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Specific mechanical feature

Subclass of:

180 - Motor vehicles

180400000 - STEERING GEAR

180443000 - With electric power assist

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DocumentTitleDate
20130043088ELECTRIC POWER STEERING APPARATUS - The present invention relates to an electric power steering apparatus. According to the present invention, it is possible to provide an electric power steering apparatus configured to be capable of being assembled in a state in which the tension of a belt is correctly tuned without using a separate process of measuring the tension of the belt, to substantially reduce the number of steps at the time of assembling a motor housing and a rack housing and hence the manufacturing costs, and to reduce vibration and noise to provide a pleasant steering feeling to a driver.02-21-2013
20100140011WORM GEAR FOR ELECTRIC ASSISTED STEERING APPARATUS AND METHOD CONTROLLING THE MOVEMENT OF THE WORM SHAFT IN A WORM GEARING - An electric power assisted steering system comprises a motor connected to a portion of a steering mechanism through a worm carried by a worm shaft and a wheel carried by an output shaft operatively coupled to the steering mechanism. The shaft is supported in at least one bearing which has some internal clearances and supports the worm shaft in such a manner that it is free to pivot through an angle in planes which include its own axis due to a degree of axial free play of the first bearing assembly. The bearing assembly comprises an inner race having a groove, an outer race having a groove, and a plurality of ball bearings located between the inner and outer races, and in which the outer race groove is not round when in its position of use such that the ball bearings permit a greater freedom of movement of the inner race relative to the outer race in a first radial direction than in a second radial direction that is orthogonal to the first direction. Tensile or compressive forces may be applied to the bearing assembly to cause the part of the assembly to become not round.06-10-2010
20100084215TORQUE DETECTOR, METHOD OF PRODUCING SAME AND ELECTRIC POWER STEERING DEVICE - A torque detector capable of achieving reduced size, a method of producing the same and an electric power steering device are provided. The torque detector has: a first shaft body and a second shaft body; a connecting shaft for connecting them; a permanent magnet fixed to the first shaft body; a plurality of magnetic bodies and auxiliary magnetic bodies, fixed to the second shaft body and arranged within the magnetic field of the permanent magnet, for forming the magnetic circuit of the permanent magnet; and a magnetic flux detector for detecting magnetic flux by induction of the magnetic bodies and the auxiliary magnetic bodies, and detects torque based on a detection output of the magnetic flux detector when the torque has acted on the first shaft body or the second shaft body, wherein the permanent magnet is formed into the shape of a flat annular body surrounding the connecting shaft or the first shaft body, and has different magnetic poles alternately magnetized in the axial direction, and opposes the magnetic bodies and the auxiliary magnetic bodies in the axial direction of the first shaft body.04-08-2010
20130025960ELECTRIC POWER STEERING SYSTEM - An electric power steering system includes a shaft coupling that drivably couples a worm gear to an output shaft such that the worm gear is tiltable with respect to the output shaft. The shaft coupling includes a fixing part coupled to the output shaft and a cylindrical part having an inner periphery in rectangular cross section and fixed to the fixing part. A coupling part that is inserted in the cylindrical part and that has an outer periphery in non-circular cross section, engageable with the inner periphery, is formed at a proximal end part of the worm gear, and the outer periphery is ridged such that gaps that allow the coupling part to tilt are provided inside the cylindrical part. Then, the cylindrical part presses an inner ring of the first rolling bearing toward an axially distal end side of the worm gear.01-31-2013
20090120713Motor-Vehicle/Gearwheel Arrangement for a Motor Vehicle Auxiliary Gearing, and Power Steering System Drive Gearwheel Arrangement - The invention relates to a motor-vehicle/gearwheel arrangement for a motor-vehicle auxiliary gearing having a gearwheel, having a flange arrangement with at least one, preferably two flanges, wherein the gearwheel is arranged adjacent to at least one of the flanges such that these rotate about a common rotational axis and engage one into the other, and with at least one connecting element for connecting the gearwheel to at least one of the flanges. An arrangement according to a first independent embodiment is advantageous in that the gearwheel has at least one connecting-element receiving depression which leads into the body of the gearwheel parallel to the rotational axis, or has, from the body of the gearwheel, an elevation for receiving the connecting element. An arrangement according to a second independent embodiment is advantageous in that the at least one flange has at least one connecting-element receiving depression which leads into the body of the flange parallel to the rotational axis, or has, rising from the body, an elevation for receiving the connecting element. The two embodiments therefore differ by a mirror-inverted arrangement of the individual components for their connection.05-14-2009
20090120712Electric Power Steering Device - An electric power steering device which has, on the outer surface of its gear box, the circuit modules of a control device such as a power module, a frame module, and a control module, and which is easily mountable on a vehicle and less affected by heating. The upper half of the gear box (05-14-2009
20130032430ELECTRICALLY-ASSISTED PARALLELOGRAM POWER STEERING SYSTEM - A parallelogram steering system transfers torque to a relay rod in response to steering commands. The steering system includes an input member configured to receive the steering commands. A pitman arm and an idler arm are both movably connected to the relay rod. An idler shaft is operatively connected to the idler arm for common rotation therewith. The steering system also includes at least one electric motor, which is configured to selectively supply assist torque to the idler shaft in response to the steering commands.02-07-2013
20130075190STEERING APPARATUS FOR VEHICLE - A steering apparatus for a vehicle provided with a steering wheel includes a main housing, a movable column member, a fixing bracket fixing the main housing to a vehicle body, a link mechanism, and a drive mechanism connected to the link mechanism, wherein the drive mechanism includes a motor, a threaded shaft, and a nut member moving in an axial direction of the threaded shaft, the nut member includes a female threaded portion threadedly engaged with the threaded shaft and a pivot shaft portion including a rotational axis orthogonal to an axis of the female threaded portion and including two flat surface portions being parallel to the rotational axis and facing each other while leaving a predetermined distance therebetween, and the link mechanism includes a bearing portion including a bearing hole and a cut-out portion including two flat surfaces configured to be parallel to the two flat surface portions.03-28-2013
20130075189MOTOR-DRIVEN POWER STEERING APPARATUS - In a motor-driven power steering apparatus having a preload means which energizes a bearing of a worm gear in a predetermined preload direction, the preload means has a guide case as well as having a bearing case, and the guide case accommodating the bearing case in which the bearing and a spring are accommodated is attached to an attaching portion which is provided in a gear housing.03-28-2013
20100044145ELECTRIC POWER STEERING SYSTEM WITH BELT DRIVE - The invention relates to an electric power steering for a motor vehicle, comprising a gear rack (02-25-2010
20120205184STEERING DEVICE, PARTICULARLY ELECTRIC SERVO STEERING DEVICE FOR A MOTOR VEHICLE - A steering device, in particular an electric power-steering device for a motor vehicle, comprising an axially parallel drive which has a steering gearbox housing, a steering axle, a steering element, and at least one axle steering mechanism connected to the steering element, having a motor unit disposed on the steering gearbox housing, having a servo gearbox disposed in a gearbox cover and having a control unit for the motor unit, which is disposed in a control device housing. The control device housing of the control unit is disposed on one axially parallel side of the servo gearbox, and a motor housing of the motor unit is disposed on the other axially parallel side of the servo gearbox.08-16-2012
20100101889Electric power steering system - In an electric power steering system, a motor drive controller that has an inverter circuit board and a control circuit board housed in a control case is provided so as to overlap a control case fixation surface formed at an end portion of a gear housing in the axial direction of a steering shaft, so that it is possible to reduce the projection in the axial direction of a motor as compared to the conventional one. In addition, a metallic board is used for the inverter circuit board and the inverter circuit board is fixed to the control case fixation surface so as to be in surface contact therewith, so that it is possible to efficiently dissipate the heat generated on the inverter circuit board into the gear housing and a fixation support plate.04-29-2010
20130081899ELECTRIC POWER STEERING SYSTEM - Assist force that assists an operation of a steering system of a vehicle is applied to a rack shaft by transmitting driving force of a motor to the rack shaft via a motor shaft and a ball screw nut. A step is formed on the outer periphery of the ball screw nut. An end portion of a third housing is arranged to face a bearing such that the distance that the ball screw nut is able to move relative to the motor shaft in axial direction and the relative movable length is longer than a predetermined length.04-04-2013
20090107756Motor rotation angle detection device - A motor rotation angle detection device, comprising a resolver which detects a rotation angle of a motor generating an assist torque for steering road wheels. The resolver includes an annular rotor disposed inside an annular stator with an air gap interposed in between an outer circumferential surface of the rotor and an inner circumferential surface of the stator, so that the stator and the rotor are rotatable relative to each other, wherein a rotor supporting member is connected to a rotary shaft of the motor, and the rotor extends out from an axial end portion of the rotor supporting member so as to surround an outer periphery of the rotary shaft. With the such a motor rotation angle detection device, it is possible to stabilize the magnetic permeability of the rotor, and accordingly to increase an accuracy with which the rotation angle of the motor is detected.04-30-2009
20090301804MOTOR-DRIVEN STEERING APPARATUS - In a motor-driven steering apparatus in which a handle stay provided with a steering handle is fixed to a steering shaft, and a motor-driven steering assist unit is interposed between the steering shaft and a tire wheel side steering member, and a taper coupling portion provided in the handle stay is coupled and fixed to a taper support portion provided in the steering shaft.12-10-2009
20090301803VEHICULAR STEERING WHEEL AND COLUMN ASSEMBLY INCLUDING TORSIONAL DAMPER DEVICE - A steering wheel and column assembly is provided for deployment on a vehicle. In one embodiment, the steering wheel and column assemblies comprises: (i) a steering column housing, (ii) a rotatable steering assembly, and (iii) a torsional damper device. The rotatable steering assembly includes a steering column shaft, which is rotatably coupled to the steering column housing, and a steering wheel, which is fixedly coupled to the steering column shaft. The torsional damper device includes a stator body, which is fixedly coupled to the steering column housing, and a rotor body, which is fixedly coupled to the rotatable steering assembly. The rotor body frictionally engages the stator body to produce a predetermined coulomb torque frictional resistance.12-10-2009
20090057051Torque Detecting Device and Electric Power Steering Apparatus Using the Same - There is provided a torque detecting device including: magnetic flux concentrating rings which locate on a magnetic circuit forming member provided in a rotating body to which a torque is exerted, the rings concentrating a magnetic flux generated by the member, a detecting part which detects the torque to the rotating body based on a density of the magnetic flux concentrated by the rings; and a holding ring which holds the magnetic flux concentrating rings and the detecting part and includes an attachment portion attaching to a stationary substance, on a circumference of the holding ring. Both end faces of the holding ring in an axial direction of the holding ring are substantially parallel. The attachment portion includes a fitting groove into which a sealing ring, which seals a gap between the attachment portion and the stationary substance fits.03-05-2009
20090266640ELECTRIC POWER STEERING APPARATUS - Since a housing 10-29-2009
20110011667TORQUE ANGLE SENSOR AND ELECTRONIC POWER STEERING APPARATUS HAVING THE SAME - Disclosed is a torque angle sensor and an electronic power steering apparatus having the torque angle sensor, which includes an upper case, an upper side of which is assembled with a sensor housing, a rotor assembled with an inside of the upper case, the rotor fitted around an outer surface of the output shaft extending through the rotor and assembled with an inside of the upper case, a lower case, a lower side of which is assembled with a spacer cover, and a middle case assembled between the upper case and the lower case. The upper case includes holding parts opposed to each other and formed on an upper surface of the upper case, which is assembled with the sensor housing, and a seating spring protruding downward with inclination from an end of one of the holding parts and elastically bent when the upper case is assembled with the sensor housing. Therefore, it is possible to remove a circumferential clearance and an axial circumferential clearance during assembling of the torque angle sensor with peripheral elements and can absorb movement created by an impact, so as to effectively prevent breakage and mis-operation of the elements included in the torque angle sensor and facilitate the assembling of the electronic power steering apparatus.01-20-2011
20110011666STEERING CONTROL SYSTEM - An input gear rotates integrally with an input shaft, and an output gear rotates integrally with an output shaft. Pinion gears are rotatably supported by pinion gear shaft members, respectively, and are meshed with both of the input gear and the output gear. An inner end part of each pinion gear shaft member is fitted to an inner peripheral wall of a corresponding primary hole of an inner ring member, and an outer end part of each pinion gear shaft member is fitted to an inner peripheral wall of a corresponding secondary hole of an outer ring member.01-20-2011
20090250288Steering apparatus - An electric power steering apparatus 10-08-2009
20080296085ELECTRIC POWER STEERING APPARATUS - A microcomputer 12-04-2008
20130161115VARIABLE RATIO TRANSMISSION MECHANISM - A variable ratio transmission mechanism is used in an automobile. The automobile includes first and second steering shafts extending along a first direction. The variable ratio transmission mechanism includes a securing unit connected to the first steering shaft, a connecting unit connected to the second steering shaft, a motor connected to the securing unit and including a revolving shaft that extends rotatably along a second direction different from the first direction, and a transmitting unit including a worm gear that is provided on the connecting unit and a worm that is provided on the revolving shaft and that engages and is angularly-slidable relative to the worm gear.06-27-2013
20120199412Ball Screw And Steering Device Equipped With The Same - Described is a ball screw for a steering device of a motor vehicle, which ball screw has a threaded spindle (08-09-2012
20100059308ELECTRIC POWER STEERING SYSTEM WITH BELT DRIVE AND CONTACTLESS BELT TENSION - The invention relates to an electric power steering for a motor vehicle, comprising a gear rack (03-11-2010
20120186897Toothed-Rack Steering Gear, and Servo Steering System Equipped With The Same - Described is a toothed-rack steering gear having a drive pinion (07-26-2012
20120186896ELECTRIC POWER STEERING DEVICE - An electric power steering device includes a metallic housing, a steered shaft, an electric motor, a ball screw device, a rolling bearing, elastic members, and a plain bearing. The plain bearing is provided between the housing and an outer ring of the rolling bearing, and formed from a resin material.07-26-2012
20090255752BALL SCREW MECHANISM AND ELECTRIC POWER STEERING DEVICE USING THE SAME - In a ball screw mechanism, a retainer is provided between an outer circumference of a ball screw shaft and an inner circumference of a ball nut and has a plurality of retainer grooves arranged in the circumferential direction for retaining a plurality of rolling balls. Each retainer groove of the retainer takes a form that allows the rolling balls therein to move radially outward but restrains the rolling balls therein from moving radially inward. Therefore, in the ball screw mechanism and an electric power steering device incorporating the same, the movement of the retainer in radial directions can be restricted by the plurality of rolling balls which are rolled along ball rolling grooves spirally formed respectively on the outer circumference of the ball screw shaft and the inner circumference of the ball nut.10-15-2009
20110284313STEERING DEVICE, IN PARTICULAR FOR A REAR WHEEL STEERING SYSTEM - A steering device for adjusting a wheel turning angle of a wheel of a motor vehicle, in particular of a rear wheel, includes a wheel guide member via which a wheel carrier of the wheel is connected to a vehicle body, the wheel carrier being swivellable about an axis of rotation disposed parallel to the wheel plane and the wheel guide member being articulated to the wheel carrier at a distance from the axis of rotation and being adjustable in length by an electromechanical drive unit, the electromechanical drive unit being connected, on the one hand, via a push rod to a joint at the wheel carrier end in order to form a swivel bearing to establish a connection to the wheel carrier, and, on the other hand, to a joint at the vehicle body end to form a further swivel bearing to establish a connection to the vehicle body.11-24-2011
20110290581STEERING DRIVE FOR A MOTOR VEHICLE - A steering drive for a motor vehicle comprising a steering wheel, a steering column, on which the steering wheel is disposed, a connecting rod, which interacts with the steering column to deflect the wheels of the motor vehicle, an electric motor, which is provided for boosting the steering thrust, as well as a belt drive, the electric motor interacting with the connecting rod via the belt drive. Said electric motor comprises a stator having twelve stator teeth as well as a rotor having ten rotor poles, the rotor poles being spaced apart from each other by an air gap and embodied as sinus poles.12-01-2011
20110108356VARIABLE TRANSMISSION RATIO MECHANISM AND VARIABLE RATIO STEERING DEVICE - A variable transmission ratio mechanism comprises: an input member capable of rotating around a first axis; and an intermediate member that allows the differential rotation of the output member. The intermediate member is capable of rotating around a second axis that is slanted relative to the first axis. On first and second power transmission surfaces of the intermediate member, corresponding first and second engaging sections are respectively arranged according to corresponding first and second arrangement pitch circles centered on the second axis. On corresponding first and second engagement circles centered on the first axis, the first and second engaging sections are respectively engageable with corresponding first and second engageable sections. The diameter of the first arrangement pitch circle differs from the diameter of the second arrangement pitch circle.05-12-2011
20090321173Car steering wheel electromechanical booster - The invention relates to car control means. The stator of an electric motor is provided with a magnet core comprising n pronounced poles and a rotor comprising n−2 poles embodied in the form of permanent magnets. The stator three-phase winding is provided with coils placed in the six equal alternating phase areas in such a way that one area is assigned to one pole and with several coils belonging to one phase in each phase area. The winding coils in the areas belonging to one phase are connected in a parallel aiding configuration. The steering wheel booster body is provided with input and output shafts which are interconnected with the aid of a torsion bar embodied in the form of a torque sensor sensing element and are linked with the sheering wheel and sheering mechanism by the other ends thereof. The electric motor rotor is mounted on the output shaft. The inventive device also comprises a controllable source for supplying the stator winding, a rotor position sensor and a controll unit which is connected to the outputs of the torque and rotor position sensors by the inputs thereof and to the control input of the supply source by the output thereof. Said invention excludes the transmission of an outside disturbance torque to the steering wheel and makes it possible to improve the producibility of the electric motor and the steering wheel buster and to increase the useful properties thereof.12-31-2009
20120097474ELECTRIC POWER STEERING SYSTEM - A gap adjustment mechanism that moves an upper housing in a direction close to a worm is disposed in a fitting portion between the upper housing and a lower housing. The gap adjustment mechanism is disposed in the fitting portion on the side of the worm or in the fitting portion on the other side of the worm.04-26-2012
20120097473MOTOR VEHICLE STEERING SYSTEM - A motor vehicle steering system includes a steered shaft inserted through a tubular housing and a screw shaft provided on the intermediate portion of the steered shaft. A ball nut threadably engaged on the screw shaft via balls is driven to rotate by electric motors. A first bushing and a second bushing held by the housing support the first end portion and the second end portion of the steered shaft slidably in the axial direction, respectively. The central axis of the intermediate portion of the steered shaft is offset from the central axis of the first end portion and the central axis of the second end portion of the steered shaft. The central axis of the ball nut and the central axis of the intermediate portion of the steered shaft match each other.04-26-2012
20090071744GEAR BOX-TYPED ACTIVE FRONT STEERING SYSTEM IN VEHICLE - According to an active front steering system (AFS) of the invention, an actuator assembly that receives steering input from a driver and AFS input from a motor is mounted to a gear box that reciprocates a rack bar connected to tie rods that are connected to wheels. Therefore, the entire size of the AFS is reduced and a decelerator that changes the steering ratio includes a single planetary gear that outputs final steering through rack bar after the steering input from the driver and the AFS input from motor are inputted across each other.03-19-2009
20120024617STEERING WHEEL FOR A MOTOR VEHICLE HAVING SUPERIMPOSED STEERING - A steering wheel for a motor vehicle is provided. The steering wheel includes a steering wheel rim for rotating actuation of the steering wheel, a steering wheel hub for connecting the steering wheel with a steering shaft of a motor vehicle, a superposition drive for the actuation of a superposition steering by means of which said steering a steering angle created by actuation of the steering wheel rim can be superposed by a superposed angle that can be created by the superposition steering so that a respective rotation movement of a steering shaft connected with the steering wheel is composed of a steering angle that can be created by actuation of the steering wheel rim and a superposed angle that can be created by actuation of the superposition steering. An arresting appliance is provided on the steering wheel, separate from the components of the superposition steering for creating the superposed angle.02-02-2012
20120024616ELECTROMECHANICAL POWER STEERING SYSTEM WITH A BALL SCREW DRIVE - The invention relates to an electromechanical power steering system with a ball screw drive (02-02-2012
20090152044Steering apparatus for vehicle - A steering apparatus for a vehicle capable of executing a steer-by-wire (SBW) mode of steering road wheels by a steering mechanism mechanically disconnected with a steering device. The steering apparatus includes a clutch which is composed of a shaft rotated together with the steering device, an internal gear ring which has a rotation center coincide with that of the shaft and transmits its rotation to the steering mechanism, an external gear ring partially intermeshed with the internal gear ring, lock members which transmit/disconnect the rotation of the shaft to the external gear, and a lock operating member for displacing the lock members to lock/unlock positions.06-18-2009
20100320025WORM GEAR HUB - A gear blank is provided. It comprises a metal hub blank having an outer perimeter. A plurality of individual adjacent tabs extend radially from the outer perimeter of the metal hub blank. A polymeric ring overlaying a portion of the metal hub blank including the tabs is provided.12-23-2010
20080277192ELECTRIC POWER STEERING APPARATUS - A microcomputer is provided with an extracting section capable of extracting a specific frequency component from an input signal. The extracting section extracts, from a pinion angle corresponding to a signal indicating the state of a steering system, a frequency component corresponding to a vibration that increases generation of a rattling noise in a speed reducing mechanism. The extracting section outputs an effective value of the extracted frequency component as a power spectrum. If the power spectrum output from the extracting section is equal to or more than a predetermined threshold value, the microcomputer outputs a motor control signal to reduce the assist force generated by the EPS actuator.11-13-2008
20090114470Electric power steering device - An electric power steering device is configured to transmit an auxiliary torque to a steering unit of front wheels, and includes: an operator; an electric motor configured to generate the auxiliary torque in accordance with at least a steering torque generated by input from the operator; the steering unit of front wheels which includes a pinion shaft; and a rotation terminating mechanism which provides a motion terminating end of the operator, the rotation terminating mechanism being disposed between the operator and the pinion shaft.05-07-2009
20090294203electric power steering apparatus - Deflectors (12-03-2009
20090294204Apparatus for Driving Steering Shaft in Motor-Driven Power Steering - An apparatus for driving a steering shaft in a motor-driven power steering system may include a pinion gear having a joining protrusion and a power transmission bearing member provided with a joining groove to be removably inserted with the joining protrusion of the pinion gear, wherein the power transmission bearing member rotates integrally with the pinion gear by being joined each other when the pinion gear is disengaged from a flywheel ring gear of an engine and thereby transmits rotation force of the power transmission bearing member to the wormwheel connected with a steering shaft.12-03-2009
20110168479LUBRICANT COMPOSITION, SPEED REDUCTION GEAR, AND ELECTRIC POWER STEERING APPARATUS - A lubricant composition, which is low in friction, does not have an attacking property against polyamide resin, etc., is excellent in heat resistance, and especially does not undergo deterioration or loss of the respective characteristics in a short term when used under a high temperature environment, is provided along with a speed reduction gear and an electric power steering apparatus that use the lubricant composition. The lubricant composition has blended therein a synthetic hydrocarbon oil, a urea thickener, zinc stearate, and a sulfur-based antioxidant. A speed reduction gear has a portion of engagement of a small gear and a large gear filled with the lubricant composition. In an electric power steering apparatus, an output of a steering assisting electric motor is speed reduced and transmitted to a steering mechanism via the speed reduction gear.07-14-2011
20080245601Clearance adjusting decelerator and electric power steering apparatus having the same - Disclosed is a clearance adjusting decelerator and an electric power steering apparatus having the same.10-09-2008
20080277190Creep Steering Control System Operable From Rearward-Facing Position - A creep steering control system for a utility vehicle is operable from a rearward-facing position. The creep steering control system includes a pivotable actuator alongside a rearward-facing seat that provides electronic output based on the position of the actuator. A linkage is provided between the pivotable actuator and steering wheel behind the seat.11-13-2008
20080277191Electric Power Steering Apparatus and Method for Controlling the Electric Power Steering Apparatus - An electric power steering apparatus includes an electric power supply device that includes a main electric power unit that supplies high-tension electric power and a sub-electric power supply unit that supplies low-tension electric power, the main electric power unit and the sub-electric power supply unit being connected to each other in parallel, and that supplies electric power to the electric motor from one of the main electric power supply unit and the sub-electric power supply unit. An assist ECU calculates a correction coefficient based on which a d-axis target current increases with a decrease in voltage output from the electric power supply device, and calculates a final corrected d-axis target current by multiplying the d-axis target current by the correction coefficient.11-13-2008
20130213727STEERING GEAR WITH ELECTRIC MOTOR, CONTROL UNIT AND SENSOR ARRANGEMENT, AND ELECTRIC POWER STEERING SYSTEM EQUIPPED THEREWITH - A steering gear comprises a helical pinion and a helical gear which are mounted in the gear housing and driven by an electric motor, wherein a control unit and a sensor system connected thereto are also disposed in or on the steering gear so as to detect and control the rotor position and/or rotation of the rotor of the electric motor. A section of the shaft of the worm located on the drive side extends in the axial direction and protrudes from the gear housing, wherein the protruding end of the section on the drive side is designed as a rotor shaft of the electric motor, and the control unit and/or the sensor system are disposed on the gear housing. The control unit and the sensor system are preferably disposed on differing sections of the gear housing. This allows a very compact, cost-saving and flexible implementation of the design.08-22-2013
20080283331VEHICLE STEERING APPARATUS - An electric motor provided in a vehicle steering apparatus includes a stator coaxially surrounding a steering shaft, an inner rotor disposed on the inner periphery of the stator, and an outer rotor disposed on the outer periphery of the stator. The facing area between the stator and the rotor can be increased by providing the inner rotor and the outer rotor in the electric motor. Consequently, the electric motor can be miniaturized while a certain output thereof is maintained. The vehicle steering apparatus can be miniaturized by miniaturizing the electric motor.11-20-2008
20080210487Power steering assembly - The invention provides for a power steering assembly and method of actuation for assisting a driver in moving the steerable wheels of a vehicle. The power steering assembly includes a housing that defines a chamber. A steering rod is disposed in the chamber and is longitudinally moveable within the chamber. A shoulder is fixed to the steering rod and has opposing sides. A shaft is supported by the housing and engages the steering rod translating the rotational movement of the shaft into a longitudinal movement of the steering rod. A first actuator and second actuator are disposed in the chamber on opposing sides of the shoulder. The first and second actuators each have an excitable material that is controlled in a series of actuations to advance the actuators in a linear movement for pushing against the shoulder to move the steering rod longitudinally within the chamber.09-04-2008
20080217096ELECTRIC POWER STEERING APPARATUS - An ECU determines whether the orientation of the vehicle is deflecting at the time of braking. In addition, in a case where it is determined that the orientation of the vehicle is deflecting, the ECU controls operation of an EPS actuator in order to reduce the assist force provided to the steering system.09-11-2008
20080277193ELECTRIC POWER STEERING DEVICE - A steering shaft is composed of an upper shaft, a lower shaft, an input shaft, and an output shaft. The upper shaft, the lower shaft, and the input shaft can rotate together, and the input shaft and the output shaft are relatively rotatably coupled to each other via a torsion bar. The rotational position of a rotor coupled to the output shaft is calculated based on the detected rotational position of the lower shaft and a steering torque detected based on the amount of relative rotational displacement of the input shaft and the output shaft. Thus, it is not necessary to include a rotor rotational position detecting unit for detecting the rotational position of the rotor within the electric motor, which reduces the size of the electric motor.11-13-2008
20090065287ROLLING DEVICE EMPLOYING LUBRICATING GREASE COMPOSITION AND ELECTRIC POWER STEERING APPARATUS EMPLOYING THE ROLLING DEVICE - A rolling device is provided which employs a lubricating grease composition which considerably diminishes irregular friction fluctuations occurring on rolling/sliding friction surfaces, shows stable low-torque characteristics in a wide temperature range, can retain a sufficient oil film even at high temperatures, has along life, and contains a novel thickener. Also provided is an electric power steering apparatus employing the rolling device.03-12-2009
20090050399ELECTRIC POWER STEERING DEVICE - In an electric power steering device, the performances of a reduction unit and a rack unit are easily warranted independently of each other, the reduction unit and the rack unit are simply assembled, the degree of freedom for the fastened positions of the reduction unit and a rack housing are raised, and advantage of the layout are taken.02-26-2009
20090211837Steering member unit - The present invention provides a steering member unit including: a metal steering member body disposed to extend substantially in a vehicle width direction; metal side brackets that are fixed respectively to both ends of the steering member body and are attachable respectively to vehicle, body side parts; and a metal stay that is fixed to an intermediate part of the steering member body and is attachable to a vehicle body floor. In an intermediate part of the steering member body, multiple ground current connecting members connectable to a vehicle body metal part are provided at intervals in a longitudinal direction (vehicle width direction) of the steering member body. Thereby, a resonance frequency of resonance of a wavelength depending on a distance in a magnetic field generated by a current flowing into the steering member body can be changed and adjusted.08-27-2009
20090260913Steering apparatus for vehicle - A steering apparatus for a vehicle capable of executing a steer-by-wire (SBW) mode in which road wheels are steered by a steering mechanism mechanically disconnected with a steering device. The steering apparatus comprises: a connecting mechanism which can connect the steering device and the steering mechanism mechanically; and an SBW control unit which sets the connecting mechanism to a disconnected state to control the steering mechanism based on an operating amount of the steering device under the steer-by-wire mode, and sets the connecting mechanism to a connected state to switch a steering mode from the steer-by-wire mode to a steer-by-wire backup mode when it has been determined that the steer-by-wire mode cannot be executed properly. The connecting mechanism is set to the disconnected state while being energized and set to the connected state while being non-energized. The SBW control unit checks whether or not the steer-by-wire mode can be executed properly at start of engine and always during operation of engine. Therefore, an SBW backup system can be activated unfailingly when the system is out of order.10-22-2009
20090255751POWER STEERING SYSTEM, SPEED REDUCTION MECHANISM AND BEARING HOLDER - [PROBLEMS] The object of the invention to provide a power steering system capable of ensuring a sufficient accuracy of meshed-engagement between toothed portions of a worm gear without complicated machining to be made to an inside of a housing.10-15-2009
20090260914ELECTRIC POWER STEERING ROTATION ISOLATOR - A steering column assembly includes a column jacket extending along a longitudinal axis and a steering shaft rotatably supported by the column jacket. A power assist module includes a housing coupled to the column jacket and a motor. The motor applies a torque to the steering shaft. An isolator connection interconnects the housing and the column jacket to permit rotational flexure of the power assist module relative to the column jacket, i.e., the power assist module may rotate relative to the column jacket, thereby preventing undesirable rotation of a lever mounted to the column jacket in response to the motor applying the torque to the steering shaft.10-22-2009
20100200326ELECTRIC POWER STEERING APPARATUS - A flange member 08-12-2010
20100181139ELECTRIC POWER STEERING APPARATUS - In an electric power steering apparatus, a worm gear is structured such that a leading end of a leading end shaft of the worm gear is always pressed and supported by a part in a peripheral direction of a diameter enlarged inner diameter portion of a collar which is urged by an elastically urging body, and is always urged toward a side coming close to a center shaft of a worm wheel.07-22-2010
20100224435OSCILLATING GEAR DEVICE, TRANSMISSION RATIO VARIABLE MECHANISM, AND MOTOR VEHICLE STEERING SYSTEM - An oscillating gear device includes an axially fixed gear piece rotatable around a first axis and an axially oscillating gear piece that oscillates while being inclined with respect to the first axis. A plurality of pins held by one of the gear pieces engage with a plurality of tooth grooves of the other gear piece in engagement regions at a predetermined length in longitudinal directions of the pins. A formula r09-09-2010
20100236860Electric power steering - An electric power steering system, and in particular a power-assisted steering system for a vehicle, comprises a steering transmission housing and a housing cover which forms an axial closure of the steering transmission housing and which is penetrated by an axially displaceable component of the steering transmission. In order to provide an electric power steering system which is easy to assemble and is not susceptible to wear, in an axially outer region of the housing cover, a first guide bushing for the axially displaceable component is integrated in the housing cover.09-23-2010
20100224436MOTOR VEHICLE STEERING SYSTEM - A motor vehicle steering system includes a transmission ratio variable mechanism capable of changing a transmission ratio, and a steering-assist-force imparting mechanism. The transmission ratio variable mechanism is provided with an input member and an output member capable of rotation about a first axis, a first bearing ring for differentially rotatably coupling to each of the input and output member, a second bearing ring for rotatably supporting the first bearing ring via a rolling element, and an electric motor for rotation-driving the second bearing ring. A second axis that is a center line of the first bearing ring and the second bearing ring is inclined relative to the first axis.09-09-2010
20100243368STEERING APPARATUS - A steering apparatus includes: a steering wheel, a shaft that transfers a rotational force from the steering wheel, a steering column that supports the shaft, a fitting bracket with which the steering column is fitted to a vehicle body-side member, a rotational force assist mechanism that applies a rotational force to the shaft, and a tilt mechanism that changes a tilt angle of the steering column. The fitting bracket includes a support portion that tiltably supports the steering column, and a secured portion secured to the vehicle body-side member. The fitting bracket is structured in such a manner that the secured portion and the support portion lie in the same plane perpendicular to the rotational axis of the shaft when the steering column is at a predetermined tilt angle that is within a range of tilt angle achievable by using the tilt mechanism.09-30-2010
20100126794MOTOR CONTROL APPARATUS, POWER STEERING APPARATUS AND BRAKE CONTROL APPARATUS - An electric power steering apparatus including: a power system board which is received in a housing, which supports a component of a power supply circuit to supply power to a motor; a control system board which is received in the housing, which supports a component of a control circuit to control the motor, and which extends radially with respect to an axis of the motor output shaft; a rotation sensor which is provided in the housing, which is located, in an axial direction of a motor output shaft, between the motor and the control system board, and which is arranged to sense a rotational position of the motor output shaft; and an output terminal which is provided with the rotation sensor, which is connected electrically with the control system board to supply a rotational position signal of the rotation sensor to the control circuit.05-27-2010
20110056762STEERING DEVICE FOR A MOTOR VEHICLE, HAVING A STEERING WHEEL AND A SUPERPOSITION GEARING - A steering device for a motor vehicle is provided. The steering device comprises a steering wheel, a superposition gearing and a gearing housing, wherein the superposition gearing is arranged in the gearing housing. The superposition gearing is designed to transmit a motor-driven adjusting movement to a steering shaft. The steering wheel forms a steering wheel base which serves for a connection to the steering shaft. It is provided that at least one constituent of the gearing housing, which constituent serves for mounting and/or fixing a gearing element of the superposition gearing or of a drive motor, is integrated into and formed in one piece with the steering wheel base of the steering wheel.03-10-2011
20090250287ELECTRIC MOTOR APPARATUS FOR ELECTRIC POWER STEERING AND ELECTRIC POWER STEERING APPARATUS - An electric motor and a control unit are integrally formed and are placed coaxially with a shaft of a gear box for reducing a speed of rotation of the electric motor and also the control unit is placed between the gear box and the electric motor, and a power feeding part of the electric motor is bonded to a bonding part of the control unit inside a housing or a case through an opening part disposed in the housing and/or the case 10-08-2009
20090038877Electrical steering device for motor vehicles - The invention relates to an electrical steering device having a ring gear arrangement made of one ring gear (02-12-2009
20120241243RECIRCULATING BALL POWER STEERING SYSTEM - A power steering system for transferring torque to a sector gear includes a first ball screw and a first ball nut circumscribing the first ball screw. The first ball nut is in torque-transfer communication with the first ball screw through a plurality of ball bearings and is meshed or engaged with the sector gear for torque transfer therewith. An electric motor is configured to selectively supply torque to the sector gear through the first ball nut.09-27-2012
20100320026VEHICLE STEERING APPARATUS - A vehicle steering apparatus (12-23-2010
20110000737VEHICLE STEERING APPARATUS - Disclosed is a vehicle steering apparatus (01-06-2011
20110108355TRANSMISSION RATIO VARIABLE MECHANISM AND VEHICLE STEERING APPARATUS INCLUDING THE SAME - A transmission ratio variable mechanism includes an input member and an output member arranged to rotate around a first axis, an intermediate member arranged to connect the input member and the output member so as to be differentially rotatable, and a motor arranged to drive the intermediate member. The motor includes a cylindrical rotor arranged to rotate around the first axis. An inner periphery of the rotor is arranged to support the intermediate member and arranged to rotatably support the input member and the output member via bearings, respectively.05-12-2011
20110024223SUPERIMPOSITION DEVICE FOR VEHICLE STEERING SYSTEM - A rotational speed superimposition device for a vehicle steering system is proposed, having an output shaft (02-03-2011
20100133036SADDLE RIDING VEHICLE - A weight balance of a vehicle body is provided in an all terrain vehicle wherein an engine is supported by a vehicle body frame and an electric power steering device having an actuator unit is provided on a steering shaft. An electric motor is provided in the actuator unit, and heavy objects including a battery and a muffler are disposed on an opposite side to the electric motor in a vehicle width direction with respect to a vehicle body centerline extending in a longitudinal direction of the vehicle and on an opposite side to the electric motor in the longitudinal direction of the vehicle with respect to the engine. To shorten and reduce weight the steering shaft is supported on a vehicle body frame through a radial bearing and ball bearings. Of the plurality of bearings, at least one of the bearings is made self-aligning.06-03-2010
20110240399POWER STEERING APPARATUS - A power steering apparatus including a joint including a first boss disposed on an axial end portion of a motor output shaft, first projections disposed on the first boss in the circumferential direction, a second boss disposed on an axial end portion of a worm shaft and opposed to the first boss, second projections disposed on the second boss in the circumferential direction and arranged between the adjacent first projections, a first elastic member made of metal and a second elastic member made of at least one of resin and rubber, the first and second elastic members being disposed between an axial end surface of the first boss and an opposed axial end surface of the second boss and cooperating with each other to generate an elastic force in such a direction as to move the worm shaft away from the motor output shaft.10-06-2011
20110073404Electric Power Steering System Over-Speed Energizing Brake System - A bi-directional over-speed energizing brake system which implements automatically in the event an electric power steering system is in an over-speed condition. For rotational speeds of a rotating component exceeding a predetermined rotational speed threshold, centrifugal force acting on brake arms of a braking assembly overcome biasing by springs such that the brake arms will frictionally engage a non-rotating brake ring to thereby slow the rotational speed of the rotating component.03-31-2011
20090032328TORQUE SENSOR TYPE POWER STEERING SYSTEM WITH SOLID STEERING SHAFT AND VEHICLE THEREWITH - A steering apparatus includes a rotatable steering shaft having an exterior, an input end for connecting a steering member and an output end for connecting to at least one steerable wheel of a vehicle. An electric motor is operatively connected to the steering shaft for rotating the steering shaft. The shaft is magnetized and serves as a torque sensor transducer. At least one magnetic field sensor is adjacent to the exterior of the steering shaft. The steering shaft and the at least one magnetic field sensor form a torque sensor for sensing torque applied to the steering shaft by the manually operable steering member and provide a signal to operate the electric motor to assist steering of the steering shaft by the manually operable steering member.02-05-2009
20090250286WORM-BELT TRANSMISSION OF A POWER-STEERING DRIVE - A power-steering drive for a steering system in a motor vehicle includes a motor driving a motor shaft and a transmission situated between the motor shaft and an output shaft. The transmission takes the form of a combined worm-belt transmission. Furthermore, in a method for adjusting the transmission of a power-steering drive, the adjustment is performed by solely adjusting the intermediate shaft relative to the motor shaft and/or the output shaft.10-08-2009
20090229909ELECTRIC POWER STEERING SYSTEMS FOR VEHICLES WITH ADJUSTABLE TORSION BARS AND METHODS OF RETROFITTING ELECTRIC POWER STEERING SYSTEMS FOR VEHICLES - An electric power steering system for a vehicle includes a torsion bar, a controller, and an electric motor. The controller is coupled to the torsion bar, and is configured to at least facilitate adjusting the stiffness of the torsion bar based at least in part on a parameter pertaining to operation of the vehicle and generating a steering assist signal based at least in part on a deflection or a strain of the torsion bar or a torque carried by the torsion bar. The electric motor is coupled to the controller, and is configured to receive the steering assist signal therefrom and to at least facilitate implementing the steering assist signal.09-17-2009
20110067946REDUCER OF ELECTRIC POWER STEERING APPARATUS - Disclosed is a reducer of an electric power steering apparatus, which can prevent the steering feeling of a driver, and the performance from being reduced by minimizing an increase in the torque, caused by moisture absorption of a worm wheel, and a size change due to the moisture absorption, and also can eliminate the playing caused by wearing of a worm and the worm wheel, and inhibit the occurring of a rattle noise caused by a backlash and a reversely input load.03-24-2011
20110067945ELECTRIC POWER-STEERING APPARATUS MOTOR APPARATUS - A first end region of a rotating shaft of a rotor of a brushless motor is inserted through a control apparatus housing space, and is supported by a first bearing that is held by a first bearing box that is disposed on a first surface side of a base portion of a first housing that configures the control apparatus housing space, and a second end is supported by a second bearing that is held by a second bearing box that is disposed in a motor frame that configures a motor housing space. A control apparatus is disposed inside the control apparatus housing space, and an end portion of the rotating shaft that projects out through the first bearing constitutes a coupling portion.03-24-2011
20110048838ELECTRIC POWER STEERING SYSTEM - In an electric power steering system, multiple cutouts (03-03-2011
20110017542REDUCER OF ELECTRIC POWER STEERING APPARATUS - Disclosed is a reducer of an electric power steering apparatus. The disclosed reducer includes: a worm shaft bearing coupled with an end of the worm shaft's motor shaft coupling portion in such a manner that a ball coupled between an inner wheel and an outer wheel supports rotation of the worm shaft; and a first damper and a second damper which are tightly fitted in one side and the other side of the worm shaft bearing, respectively, while being insertedly-coupled with the worm shaft, so as to support the worm shaft and absorb a rattle noise transferred via the worm shaft, wherein each of the first damper and the second damper is provided with supporting plates at both sides thereof, and between the supporting plates, a damper made of an elastic material is coupled and formed. The reducer of the electric power steering apparatus reduces a rattle noise which occurs by an increase in backlash caused by abrasion of the worm and the worm wheel, or occurs by an impact transferred from a road via a wheel and the steering shaft, thereby providing a pleasant driving condition to the driver.01-27-2011
20110147113REDUCER OF ELECTRIC POWER STEERING APPARATUS - A reducer of an electric power steering apparatus is disclosed. It reduces rattle noise generated by a backlash due to friction and wear of a worm and a worm wheel or an impact transmitted from a road surface through a wheel and a steering shaft and enhances a steering feeling of a driver by improving the catching phenomenon and rotational resistance generated between a worm shaft and a worm shaft bearing.06-23-2011
20110147111ELECTRICAL AUXILIARY MODULE FOR A VEHICLE STEERING SYSTEM - An auxiliary module has a gearbox, a motor, a torque detector and a controller. The gearbox has a casing, a sun gear, a planet gear assembly, a driven gear and a driving axle. The planet gear assembly engages the sun gear and has a driving gear, multiple planet gears and an annular gear. The planet gears are mounted rotatably on the driving gear and engage the sun gear. The annular gear is mounted around and engages the planet gears. The driven gear engages the driving gear. The driving axle is mounted co-axially on the driving gear. The motor is connected co-axially to the sun gear. The torque detector is mounted on the casing of the gearbox with fasteners to detect torque applied on the driving axle. The controller is connected electrically to the motor and the torque detector to adjust torque output from the motor.06-23-2011
20110147112WORM WHEEL, POWER STEERING APPARATUS INCLUDING THE WORM WHEEL, AND METHOD OF FORMING THE WORM WHEEL - A worm wheel including an annular worm wheel main body formed from a resin material by injection molding, a plurality of teeth disposed on an outer periphery of the worm wheel main body in a circumferential direction of the worm wheel main body, wherein a non-cutting region is provided on respective tooth flanks of the teeth and located offset from a mid-position of a whole depth of the respective teeth in a radially outward direction of the worm wheel main body, the non-cutting region being not formed by cutting by a hob after completion of the injection molding, and a cutting region is provided on the respective tooth flanks, the cutting region being formed by cutting by the hob after completion of the injection molding.06-23-2011
20080236933Vehicle steering system - A motor vehicle steering system includes a transmission mechanism for transmitting a power of an electric motor to a steering mechanism. The transmission mechanism includes an intermediate gear meshed with a driving gear and a driven gear. The intermediate gear includes: an annular teeth forming portion rotatably supported by an outer periphery of a support shaft via a rolling bearing, the support shaft supported by a housing; and an annular elastic member interposed between an inner periphery of the teeth forming portion and an outer ring of the rolling bearing and interconnecting the teeth forming portion and the outer ring in a manner permitting torque transmission. An axis of the support shaft and an axis of the teeth forming portion are mutually offset, whereby an inner periphery of the elastic member is located eccentrically to an outer periphery thereof. A pre-load to press the teeth forming portion against the driving gear and the driven gear is provided by an elastic restorative force of the elastic member.10-02-2008
20090000857ELECTRIC POWER STEERING CONTROL APPARATUS - An electric power steering control apparatus can reduce a steering vibration such as shimmy vibration generated due to the structure of a vehicle without adding new mechanism elements. The apparatus includes a torque sensor for detecting steering torque generated by a driver, a torque controller for calculating an assist torque current for assisting the steering torque based on the detected steering torque, a vehicle speed detector for detecting the speed of the vehicle, a specific frequency detector for detecting a specific frequency from the detected vehicle speed, a motor angular velocity calculator for calculating a motor angular velocity from a motor angle detected by an angle detector, a phase compensator for converting a vibration frequency of the motor angular velocity, and a vibration suppression current calculator for calculating a vibration suppression current to suppress the steering vibration from respective output signals of the phase compensator and the specific frequency detector.01-01-2009
20110155499Gearbox Assembly for an Electric Power Steering System - A gearbox assembly for all electric power steering apparatus comprises an input shaft which carries a worm gear and is supported relative to the housing at one end by a first bearing assembly and at the other by a second bearing assembly, an output shaft which carries a wheel gear which is fixed relative to a housing and which meshes with a worm gear on the input shaft, and a spring assembly which acts between the housing and the first bearing assembly, and the spring assembly applying a biasing force onto the second bearing in a first direction away from the neutral position so as to ensure that the worm and wheel are fully engaged. The spring assembly has a spring rate which has a step change about the neutral position such that the rate of change in the force exerted by the spring assembly on the second bearing assembly as the spring moves in the first direction from its neutral position is lower than the rate of change in the force as the spring moves in the second direction away from the neutral position.06-30-2011
20110162904LOWER TYPE MOTOR DRIVEN COLUMN APPARATUS - A lower type motor-driven column apparatus includes a tilt unit having a column tube and a tilt link forming a plurality of hinge fixed points in order to tilt up/down a steering wheel by vertical motion generated with rotation due to straight motion of a tilt rod through a tilt motor, a telescopic unit implementing telescopic movement pushing or pulling the column tube by means of straight motion of a tele-rod through a tele-motor, and a shock-absorbing member absorbing and attenuating a shock stroke of the column tube, ahead of the tilt unit and the telescopic unit, in which the operation mechanism of the tilt unit and the operation mechanism of the telescopic unit are individually implemented, such that the MDPS can be easily used for middle-sized and large-sized vehicles which are difficult to use the upper type and it is possible to save fuel of the middle-sized and large-sized vehicles.07-07-2011
20110132682STEER BY WIRE APPARATUS - A steer by wire apparatus performing steering operation by turning a wheel when a vehicle turns, may include a tie rod provided with one end pivotally connected to a knuckle of the wheel, a coupling unit rotatably mounted at a sub-frame of a vehicle body, connected to the other end of the tie rod, and converting rotation direction of torque from a first rotation direction to a second rotation direction which is substantially perpendicular to the first rotation direction so as to slidably move the tie rod from the coupling unit and control a steering angle of the wheel, and a motor unit fixed to the sub-frame and supplying the torque to the coupling unit according to a control signal of a vehicle ECU, the rotation direction of the torque being the same as the first rotation direction or being opposite to the first rotation direction.06-09-2011
20100116582REDUCER OF ELECTRONIC POWER STEERING APPARATUS BACKGOUND OF THE INVENTION - A reducer of an electronic power steering apparatus is disclosed. The reducer of an electronic power steering apparatus aids the operation of a steering wheel by the driver by preventing a clearance from being caused by frictional wear between a worm and a worm wheel, by reducing rattle noise caused by backlash, and by minimizing the change in the clearance due to a change in torque.05-13-2010
20090308682Power steering for an all terrain vehicle - An all-terrain vehicle including a frame having longitudinally-spaced ends defining a first longitudinal axis, and a power steering unit supported by the frame. The power steering unit has an output shaft which is held at its free end in an aperture, and rotates within a bearing.12-17-2009
20080217097ELECTRIC-POWERED POWER STEERING APPARATUS - An assist apparatus for electric-powered power steering apparatus is provided to have a torque sensor, steering shaft, preload pad 09-11-2008
20100243367POWER STEERING APPARATUS - A power steering apparatus includes a worm wheel mounted on the steering shaft, a worm shaft engaged with the worm wheel, a gear housing having a wheel accommodating portion to accommodate the worm wheel and a shaft accommodating portion to accommodate the worm shaft, a bearing mounted on the worm shaft to rotatably support the worm shaft, a holder disposed in the shaft accommodating portion and having a bearing retaining portion to retain the bearing and a resilient element disposed in the shaft accommodating portion and having a resilient body portion formed with a curvature. The resilient body portion is so structured as to become deformed in such a manner as to increase or decrease in diameter when the bearing shifts in a direction that moves the worm shaft away from the worm wheel and bias the bearing in a direction that urges the worm wheel toward the worm wheel.09-30-2010
20110108354TRANSMISSION RATIO VARIABLE MECHANISM AND VEHICLE STEERING APPARATUS - A transmission ratio variable mechanism includes an input member and an output member, which are rotatable around a first axis, an inner ring arranged to connect the input and output members to each other so as to be differentially rotatable, an outer ring, and a motor. A second axis serving as a center axis of the inner ring and the outer ring is inclined to the first axis. The transmission ratio variable mechanism includes uneven engagement sections including a projection provided on one of each of end surfaces of the inner ring and a power transmission surface corresponding to the end surface, and a recess. The inner ring includes a first member forming the first end surface and a second member forming the second end surface. The first and second members are formed separately from each other and coupled to each other so as to be movable together.05-12-2011
20120152646EPS MOTOR HAVING STEERING ANGLE SENSOR - Disclosed is an EPS motor having a steering angle sensor for an electronic power steering system, wherein the EPS motor includes a housing, a bracket, a rotating shaft, a stator and a rotor, and the housing includes an upper housing having the stator and the rotor in an internal space thereof, the bracket coupled to an upper portion thereof, and the rotating shaft coupled to the upper housing to protrude downwards therefrom, and a lower housing disposed under the upper housing to receive the steering angle sensor therein.06-21-2012
20120043156ELECTRIC POWER STEERING DEVICE - An electric power steering device including an input shaft to which a steering wheel is connected, an output shaft connected to a wheel side, a torsion bar provided between the input shaft and the output shaft, and a torque sensor that detects steering torque input from the steering wheel. An electric motor is driven in accordance with the torque detected by the torque sensor. A worm wheel is provided on the output shaft to transmit rotation of the electric motor to the output shaft in a housing, wherein a boss of the worm wheel is fitted into an outer circumference of the output shaft, and a bearing fitted into the outer circumference of the boss is supported on the housing.02-23-2012
20090000858STEERING DEVICE WITH VARIABLE STEERING RATIO MECHANISM - A first reduction ratio established between first internal teeth of an input gear and first external teeth of a first planetary gear of an annular planetary gear unit is set different from a second reduction ratio established between a second internal teeth of an output gear and second external teeth of a second planetary gear of the annular planetary gear unit. A rotation cam unit is installed in a circular opening of the annular planetary gear unit to cause, upon rotation thereof, the first and second planetary gears to make an eccentric rotation relative to a common axis of the first and second internal teeth thereby to induce a circumferential movement of a first meshed portion between the first external teeth and the first internal teeth and a second meshed portion between the second external teeth and the second internal teeth. The rotation cam unit is actuated by an electric motor.01-01-2009
20120111657ELECTRIC POWER STEERING SYSTEM - A curvature radius of a raceway groove of an inner ring of a first bearing supporting a first end portion of a worm shaft and a curvature radius of a raceway groove of an outer ring of the first bearing are larger than 50% of a diameter of each rolling element of the first bearing, whereby the worm shaft is pivotable about the first end portion. Internal clearances in the first bearing are eliminated because the first bearing is pressed in a radial direction by a pressing member. When the worm shaft vibrates relative to a housing in an axial direction, paired second elastic members and damp and absorb the vibration.05-10-2012
20110048839ELECTRIC POWER STEERING SYSTEM - In an electric power steering system, a ball screw nut (03-03-2011
20120055730Steering control apparatus - A steering control apparatus has a variable gear ratio device and a power steering device. If abnormality arises in the VGRS device, an EPS motor is controlled based on a steering wheel angle and a speed increase ratio. Thus, vehicle wheels are controlled appropriately when abnormality arises in the VGRS device. Steered angle of the vehicle wheels relative to the steering wheel angle is not changed between before and after occurrence of abnormality in the VGRS device. As a result, movement of a vehicle does not deviate from the steering wheel angle and feeling of discomfort in steering a vehicle can be reduced.03-08-2012
20120061167TORQUE SENSING SYSTEM HAVING TORQUE SENSOR, METHOD FOR DETERMINING AN AMOUNT OF TORQUE, AND STEERING SYSTEM - A torque sensing system, a torque sensor, a method for determining an amount of torque, and a steering system are provided. The method includes generating a first output signal utilizing a first plurality of piezo-electric transducers disposed between a first plurality of tooth portions of a first hub portion and a second plurality of tooth portions of a second hub portion when the first hub portion is rotated in a first direction relative to the second hub portion. The transducers are electrically coupled in series with one another. The method further includes filtering the first output signal to obtain a first filtered signal and amplifying the first filtered signal to obtain a first amplified signal. The method further includes determining a first torque value indicative of a first amount of torque applied to an input shaft based on the first amplified signal.03-15-2012
20120118663LOCK DEVICE AND ELECTRIC POWER STEERING SYSTEM - A lock device that restricts movement of a movable body includes: a lock member that is engageable with an engagement portion formed at the movable body; an urging member that urges the lock member in a direction away from the engagement portion; and an actuator that moves the lock member toward the engagement portion to engage the lock member with the engagement portion against an urging force generated by the urging member.05-17-2012
20110088963STEERING DEVICE FOR A MOTOR VEHICLE, HAVING A STEERING WHEEL, A STEERING SHAFT AND A SUPERPOSITION GEARING - A steering device for a motor vehicle is provided. The steering device has a steering wheel, having a steering shaft and having a superposition gearing which is arranged in or on the steering wheel and which is designed to transmit a motor-driven adjusting movement to the steering shaft. In one form, at least one interface is provided which, in the presence of a defined condition, separates or limits a transmission of force between the steering shaft and the superposition gearing. The interface is for example an overload clutch.04-21-2011
20110088962POWER-OPERATED STEERING ASSISTING DEVICE FOR VEHICLES - A power-operated steering assisting device is provided for a vehicle and includes a rotation detector, a motor assembly, and a reduction and driving mechanism coupled to a steering shaft of a steering wheel of the vehicle. Upon detecting the rotation of the steering shaft, the rotation detector activates the motor assembly to drive the operation of the reduction and driving mechanism, so that through the engagement between an internal-toothed output ring of the reduction and driving mechanism and a toothed section formed on an outer circumference of the steering shaft, the steering shaft is rotated and an assistance to the steering operation carried out by a driver of the vehicle is realized to provide an effort-saved operation of turning the steering wheel by the driver. No hydraulic system is included in the steering assisting device and thus maintenance of the hydraulic system can be eliminated.04-21-2011
20090133955ELECTRIC POWER STEERING APPARATUS - A drive control unit alone can be replaced without detaching an electric power steering apparatus from a gear housing. A motor housing of an electric motor, which outputs assist torque to a steering wheel of a vehicle, and a drive housing of the drive control unit, which controls the driving of the electric motor, are coupled to each other at a mating surface in a surface to surface contact manner, and the drive housing and the gear housing are coupled with each other on the same axis. A location of connection, at which a power supply input terminal block of the electric motor and power supply bus bars of the drive control unit are connected to each other by us of screws, is arranged at a joint location at which the motor housing and the drive housing are joined to each other by screws.05-28-2009
20100206656BALL SCREW UNIT AND ELECTRIC POWER STEERING APPARATUS - A fitting recess portion that connects fitting holes to each other is formed in a peripheral face of a ball screw nut. A circulation member includes a pair of fitted portions that are fitted in the fitting holes, and a connecting portion that provides communication between the fitted portions. A communication groove that has an opening on the fitted end side of the connecting portion and that extends in the axial direction is formed in the connecting portion. When the connecting portion is fitted in the fitting recess portion and the opening of the communication groove formed in the connecting portion is blocked by a bottom portion of the fitting recess portion, a second path that forms a return path together with first paths formed in the fitted portions is formed.08-19-2010
20090294205 GEAR ASSEMBLIES - In a gearbox for use in an electric power assisted steering system comprises a housing, an input shaft located at least partially within the housing which carries a worm gear and includes means for coupling to a motor rotor at one end, an output shaft located at least partially within the housing which carries a wheel gear, and a first bearing means which supports the input shaft at a side of the worm distal from the end of the shaft which connects to the motor rotor and second bearing means which supports the input shaft at the other side of the worm, the invention comprises further providing a first biasing means adapted to apply an axial load to the input shaft to bias the axial clearance in the second bearing, the second biasing means acting upon a part of the first bearing means; and a second biasing means adapted to apply a radial load to the input shaft to bias the worm into engagement with the wheel gear, the second biasing means also acting upon a part of the first bearing means.12-03-2009
20100051378ELECTRIC POWER STEERING DEVICE - A parallel shaft gear mechanism (03-04-2010
20100012419ELECTRICAL POWER STEERING WITH AIR DISCHARGE SYSTEM - The invention relates to an electrical power steering system for a motor vehicle with a steering housing, in which a gear system is arranged, wherein a bar mounted such as to be displaceable longitudinally in the housing is a gear element for actuating steerable wheels, and wherein the steering housing is closed off by at least one folding bellows element, which is secured on one side to the steering housing and on the other side to the bar. Rapid pressure compensation in the event of temperature change is guaranteed, because a hose is connected at one end such as to communicate with the interior volumes of the steering housing, and when in operation is secured at a second free end above the steering housing.01-21-2010
20120181102STEERING SYSTEM - A steering system includes a motor that rotates a power transmitting member, a rotating body to which rotative power of the motor is transmitted via the power transmitting member, a rack shaft that is driven in its axial direction according to rotation of the rotating body, a rack housing that houses the rack shaft and the rotating body, and a bearing interposed between the rack housing and the rotating body. A receiving portion of the rotating body which engages with the power transmitting member is provided at an opposed surface as a portion of an outer circumferential surface of the rotating body which is opposed to an output shaft of the motor, and the bearing is provided on a non-opposed surface other than the opposed surface.07-19-2012
20120217085MOTOR-DRIVEN POWER STEERING APPARATUS - In a motor-driven power steering apparatus, a guided surface is provided in an outer periphery of a bearing case which retains a bearing of a worm gear, and a gear housing is provided with a guide member having a guide surface which comes into contact with the guided surface of the bearing case so as to guide a motion of the bearing case in an energizing direction of the bearing.08-30-2012
20110120798ELECTRIC POWER STEERING SYSTEM - An electric power steering system (05-26-2011
20120080258SPLINE TELESCOPIC SHAFT, VEHICLE STEERING APPARATUS WITH THE SPLINE TELESCOPIC SHAFT, AND METHOD FOR MANUFACTURING THE SPLINE TELESCOPIC SHAFT - A spline telescopic shaft includes an inner shaft and a tubular outer shaft fitted slidably in an axial direction, outer splines provided on an outer periphery of the inner shaft, inner splines provided on an inner periphery of the outer shaft, a resin coating provided on at least one of the outer splines and the inner splines, and a lubricant retaining groove formed on the resin coating by using any of a laser, water jet, and compressed air, and extending in a direction crossing the axial direction.04-05-2012
20120241245ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus for assisting steering of a steered wheel. The electric power steering apparatus includes an electric motor with a built-in controller for controlling rotation, a transmission mechanism for transmitting the rotation of the electric motor to the steering shaft, a connector used to pull out wiring from the controller to the outside, a first casing in which the connector and the electric motor are to be mounted and which includes an work hole used for a wire connection operation of the controller and the connector, a lid member for closing the work hole, and a second casing to be fixed to the first casing while housing the transmission mechanism. The second casing including a cover part for covering the lid member in a state fixed to the first casing.09-27-2012
20120241244RECIRCULATING BALL POWER STEERING SYSTEM - A power steering system includes an input shaft operatively connected to an input member, and a sector gear operatively connected to a pitman arm. A first ball screw is formed on the input shaft. A first ball nut circumscribes the first ball screw and is in torque-transfer communication therewith through a plurality of ball bearings. A first rack is rigidly attached to the first ball nut, and is meshed with the sector gear for torque transfer therewith. A second ball screw is not substantially coaxial with the first ball screw. A second ball nut circumscribes the second ball screw and is in torque-transfer communication with the second ball screw through the ball bearings. A second rack is meshed with the sector gear for torque transfer therewith. An electric motor is configured to selectively supply torque to the sector gear through the second ball screw.09-27-2012
20080245600Electric Power Steering Apparatus - The present invention relates to an electric power steering apparatus for assisting steering of a steering shaft by the rotation power of an electric motor through a reducer based on the steering torque detected by a torque sensor. A rotary potentiometer is disposed in the reducer, and a portion of a swing arm of the potentiometer is engaged with a swirl groove formed on the side of a worm wheel in the reducer as well as the swing arm is swingingly rotated according to the rotation of the worm wheel to thereby detect the rotation angle of the steering shaft.10-09-2008
20130133974ELECTRIC POWER STEERING SYSTEM - There is provided an urging mechanism that elastically urges a second end portion of a worm shaft that is supported so as to be pivotable about a first end portion. The urging mechanism is configured to adjust a backlash between the worm shaft and a worm wheel by elastically urging the second end portion in a perpendicular direction that is perpendicular to a direction in which an inter-axis distance between the worm shaft and the worm wheel increases and decreases, in a state where increases and decreases in the inter-axis distance is prevented.05-30-2013
20130112493RACK-DRIVEN STEERING APPARATUS AND RACK-DRIVEN AUXILIARY POWER STEERING APPARATUS INCLUDING THE SAME - Disclosed are a rack-driven steering apparatus and a rack-driven auxiliary power steering apparatus including the same. The present invention can protect peripheral parts such as a motor for driving a nut pulley and an electronic control unit to improve durability when an excessive load reversely input from the outside is transmitted during an operation of a belt by the motor, and prevent a steering disabling state during a high speed travel of the vehicle, thereby providing a driver with a stable steering condition.05-09-2013
20130126260POWER STEERING SYSTEM FOR VEHICLE - A power steering device of a vehicle is provided to minimize a rattle noise and improve a steering feel. The power steering device of a vehicle may include a worm gear that is rotated by a motor, a worm wheel that is connected to a steering wheel to be rotated by the rotation of the worm gear, an elastic member that applies a load to the worm gear such that the worm gear contacts the worm wheel, and an operating portion that selectively varies the load of the elastic member that is applied to the worm gear.05-23-2013
20130126261RACK-DRIVEN AUXILIARY POWER STEERING APPARATUS - A rack-driven auxiliary power steering apparatus prevents a ball nut and a nut pulley from idling due to a slip thereof and increases durability when the drive belt is operated by driving of a motor, and minimizes vibrations and noise transferred through the rack bar, the ball nut, and the nut pulley when the rack bar is slid while the nut pulley and the ball nut are rotating, thereby providing a comfortable steering feeling to the driver.05-23-2013
20130126259STEERING APPARATUS OF VEHICLE AND SYSTEM OF CONTROLLING THE SAME - A steering apparatus may include a motor; a motor shaft connected to the motor and adapted to deliver torque of the motor; a variable steering section connected to a steering column coupled to a steering handle and adapted to change angle and length of the steering column; and a connecting section adapted to receive from the motor shaft and deliver to the variable steering section the torque of the motor, wherein the variable steering section includes a tilting device adapted to change the angle of the steering column, a telescopic device adapted to change the length of the steering column, a variable steering clutch adapted to be coupled with one of the tilting device and the telescopic device selectively, and a delivery member coupled to the variable steering clutch and adapted to deliver the torque of the motor received from the connecting section to the variable steering clutch.05-23-2013
20130126258STEERING APPARATUS OF VEHICLE AND SYSTEM OF CONTROLLING THE SAME - A steering apparatus of a vehicle including a motor, a motor shaft, a power delivery section selectively engaged to the motor shaft, a variable steering section connected to the steering column and selectively engaged to the motor shaft to control an angle and a length of the steering column, a connecting section selectively engaged to the motor shaft and delivering the torque of the motor to the variable steering section, and a first converting section delivering the torque of the motor to one of the power delivery section and the connecting section, wherein the first converting section includes a motor clutch coupling a power delivery shaft of the power delivery section to or decoupling the power delivery shaft from the motor shaft, and a delivery member engaged to the motor shaft when the motor shaft is decoupled from the power delivery shaft by the motor clutch.05-23-2013
20110220432ELECTRIC POWER STEERING ASSEMBLY - An improved structure for a rack drive assembly adapted for use in a vehicle electric power steering assembly includes a ball nut assembly operatively connected to a screw portion of a rack portion of a steering member of the power steering assembly for effecting axial movement of the steering member upon rotation of a vehicle steering wheel. According to one embodiment, the ball nut assembly includes a ball nut having an outer surface; a bearing assembly fixedly disposed in the rack housing and carried by the ball nut for rotatably supporting the ball nut assembly relative to the steering member; and a damper disposed on an outer race of the bearing assembly. The damper includes a pair of dampers disposed on the outer race of the bearing assembly, each of the dampers including at least a first member formed from a first rigid material and a second member formed from a second damping material.09-15-2011
20100282535MOTOR VEHICLE STEERING SYSTEM - A vehicle steering system including a transmission ratio variable mechanism that has a first shaft connected to a steering member and a second shaft connected to a turning mechanism, coupled coaxially to each other, and a transmission ratio variable mechanism motor disposed coaxially with the first and second shafts for driving the transmission ratio variable mechanism. The transmission ratio variable mechanism motor includes a tubular rotor, and an accommodation space is defined on the inner side in the radial direction of the tubular rotor. At least one of sensors is disposed inside the accommodation space.11-11-2010
20120273292Electric Power Steering Device - There is provided an electric power steering device for solving unsolved problems with ensuring advantages of a control device of motor housing mounting type and gearbox mounting type. An electric power steering device includes: a steering column in which a steering shaft for transmitting a steering torque is built; an electric motor for transmitting a steering assist force through a gear mechanism in a gearbox to the steering shaft; and a control device for driving and controlling the electric motor. The control device including at least: a drive circuit module including a switching element for driving the electric motor, and mounted on a housing of the electric motor; and a control module, mounted on the gearbox, for controlling the drive circuit module.11-01-2012
20100314192VEHICLE STEERING APPARATUS AND MANUFACTURING METHOD OF SAME - An electric power steering apparatus (12-16-2010
20130180794Power Steering System - A power steering system has: a steering shaft; a pinion shaft; a torque sensor; a rack housing communicating with inside of the sensor housing; a rack shaft provided in the rack housing; a motor housing communicating with inside of the rack housing; an electric motor provided in the motor housing; an ECU housing communicating with inside of the motor housing; a motor control unit housed in the ECU housing; and a respiration valve provided at any of the sensor housing, the rack housing and the motor housing and located at an upper side with respect to an upper end of the ECU housing in vehicle-mounted state. The respiration valve has function by which air passes through each house and between inside and outside of the ECU housing so as to absorb change of expansion/contraction of the air in the ECU housing while suppressing entry of water from the outside.07-18-2013
20110303480ELECTRIC POWER STEERING APPARATUS - In an electric power steering apparatus, an elastic member, disposed between the steering shaft and the housing, configured to be elastically deformed in accordance with rotation or displacement in a vehicle width direction, of the steering shaft. At least two bearings, disposed with a gap in an axial direction of the steering shaft, are configured to support the steering shaft. The elastic member is disposed between the bearings. A supporting member may be disposed between the steering shaft and the elastic member and configured to be displaced by a rotation of a predetermined angle or predetermined distance in accordance with the rotation or a displacement, in the width direction of the vehicle, of the steering shaft with slidable support for the steering shaft. The elastic member is fixed to the supporting member and abuts the housing.12-15-2011
20110303479Steering control apparatus - A steering control apparatus acquires vibration torque, which is generated by vibration of a gear mechanism when a steering wheel is operated at a steering angle. By setting the acquired vibration torque as a torque difference, an EPS motor current command value is corrected based on the torque difference thereby to calculate a corrected EPS motor current command value. Rattling and vibration caused in the gear mechanism are suppressed from being transferred to the steering wheel through an input shaft so that a driver is released from uncomfortable feeling.12-15-2011
20120018242ELECTRIC POWER STEERING APPARATUS AND ASSEMBLY METHOD THEREFOR - An electric power steering apparatus includes a gear housing that has a pulley space in which a driven pulley, a driving pulley and a timing belt that are placed so as to be operatable and which communicates with the outside of the gear housing. The gear housing also has a motor-side hole into which a drive shaft of an electric motor is inserted, and a pulley-side hole into which the drive pulley is inserted and which is formed at a position opposite the motor-side hole across the pulley space.01-26-2012
20130199867STEERING APPARATUS AND CONNECTOR - A steering apparatus includes a wire fitting bracket that is fitted to an end portion of a connecting wire for connecting an outer tube to an inner tube and that has a bracket body and a plurality of protrusions. The bracket body is fitted to a steering column-side member with a bolt, and has a bolt insertion hole through which the bolt is passed. The protrusions protrude from the bracket body, and are arranged around an axis of the bolt insertion hole. The protrusions are formed of rotation restricting protrusions that restrict rotation of the wire fitting bracket and an erroneous fitting prevention protrusion that prevents erroneous fitting of the wire fitting bracket.08-08-2013
20120061168ELECTRIC POWER STEERING SYSTEM - A reduction gear coupled to an electric motor includes: a first bearing that rotatably supports a first end portion of a worm shaft such that the worm shaft is allowed to oscillate in an oscillation direction about the first end portion; and a first elastic member that elastically urges a second bearing in such a direction that an axis-to-axis distance between the worm shaft and the worm wheel reduces. The first end portion and an output shaft of the electric motor are coupled by a joint. A second elastic member located between the joint and the first end portion elastically urges the worm shaft toward a second end portion and applies a preload on the first bearing. An outer ring of the first bearing is interposed in an axial direction by the third elastic member and the fourth elastic member.03-15-2012
20130206497HELICAL GEARING FOR A STEERING SYSTEM OF A MOTOR VEHICLE - Helical gearing for a steering system of a motor vehicle comprises a helical pinion which engages a helical gear. Minimization of friction in the gearing and increased efficiency since continuous elastically urging with an approximately consistent spring force during the entire service life is attained. It is not necessary for a very large spring force to be applied. By way of the continuous elastically urging with an approximately consistent spring force, clattering noises or disturbing noises are prevented or largely reduced throughout the entire service life. Due to the simple design the requirements on assembly are reduced. It is advantageous that the elastically urging of the helical pinion or the worm need not be adjusted during assembly since the necessary elastically urging is automatically adjusted.08-15-2013
20130206498POWER STEERING SYSTEM - An electric auxiliary power steering system for a vehicle, comprises a rotating component driven by a servomotor and comprises a rolling bearing for axially and radially supporting the component in the frame. At least one inner race or one outer race of the rolling bearing is split into two race parts along a parting plane that runs approximately perpendicular to a longitudinal axis of the rotating component, the two parts being axially spring-loaded against one another, wherein the ends of the race parts facing one another are aligned at an angle from the radial outer side thereof to the radial inner side thereof, and an element with a conical cross section and having a higher coefficient of thermal expansion than the coefficient of thermal expansion of the outer ring or the inner ring is placed between the ends so that when heat is introduced, the element expands and the race parts are able to move toward one another, and when the element cools the race parts can move apart axially.08-15-2013

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