VOLVO CONSTRUCTION EQUIPMENT HOLDING SWEDEN AB Patent applications |
Patent application number | Title | Published |
20140174852 | STEP APPARATUS FOR HEAVY CONSTRUCTION EQUIPMENT AND TREE HARVESTER HAVING LEVELING SYSTEM - A step apparatus for heavy construction equipment and tree harvester having a leveling system for controlling a horizontal level of a cab and an upper frame is provided, which includes a step protector including a main body fixedly installed on one side of an upper frame, a step guide hole opened from an inside of the main body to an outside, a guide rail formed along a length direction of an inner side wall of the main body, and an insert hole formed on one side of the guide rail and open toward a vertically upward direction of the guide rail; a side step including a plurality of foot steps arranged at specified intervals on a step frame to form stairs, a step drawer formed on an upper part of the step frame and seated in the step guide hole, and a guide pin positioned adjacent to the step drawer and projected toward the side wall of the main body, wherein when the guide pin is slid along the guide rail, the step frame is seated in the main body or is drawn out from the inside of the main body; and a folding actuator including a cylinder rod coupled to the step drawer to be extended and contracted, the folding actuator drawing the step drawer to the inside of the main body of the step protector. | 06-26-2014 |
20140086757 | SYSTEM AND METHOD FOR CONTROLLING ENGINE REVOLUTIONS FOR HYBRID CONSTRUCTION MACHINE - A system and method for controlling engine revolutions for a hybrid construction machine, including an engine, a hydraulic pump which is driven by the engine to drive a hydraulic actuator with discharged hydraulic fluid, a motor-generator which is driven by the engine to generate electricity and to drive the hydraulic pump as a motor supplementing the engine, an energy storage device which is charged with electric energy generated by the motor-generator and which supplies the electric energy for motor operation of the motor-generator, a torque detection unit for detecting an output torque of the hydraulic pump that is required to drive the hydraulic actuator, and a hybrid control unit for controlling the motor operation of the motor-generator to supplement the engine output if the change of the output torque of the hydraulic pump exceeds a predetermined level and it is determined that an engine revolution drop will occur. | 03-27-2014 |
20110098150 | DISK BRAKE, PLANET TRANSMISSION, DRIVE DEVICE AND WORK VEHICLE - A disk brake includes a set of brake disks, which includes a set of rotor disks and a set of stator disks, which are arranged so that every other brake disk includes a stator disk and every second disk includes a rotor disk. The brake disks are displaceable in relation to one another along a central axis for engagement and disengagement with one another. There is a layer of coating material on at least one of the sides of the stator disk for engagement with the adjacent rotor disk. | 04-28-2011 |
20100186395 | APPARATUS FOR COOLING OVERHEATED GAS IN ENGINE ROOM - An apparatus for cooling overheated gas generated from a diesel particulate filter which is connected between a diesel engine and an exhaust pipe of the diesel engine is disclosed. The apparatus includes a tail pipe for discharging outwardly the overheated gas discharged from the diesel particulate filter, a cooling fan, provided at one side of an engine room, for generating an air stream by sucking ambient air, and a diffuser enclosing an outer circumference of the tail pipe in such a way a space is formed between the diffuser and the tail pipe to prevent the diffuser from directly contacting the tail pipe. The engine room is provided with a through-hole penetrating one side of the engine room, and the tail pipe has one end connected to the diesel particulate filter, and the other end extended outwardly from the engine room through the through-hole. | 07-29-2010 |
20100180862 | ENGINE REVOLUTION SPEED CONTROL SYSTEM FOR CONSTRUCTION MACHINE - An engine revolution speed control system for a construction machine is disclosed. The engine revolution speed control system includes an input unit that sets an engine revolution speed by a user, outputs a setting process as a set signal, and determines whether or not an engine is driven at a set engine revolution speed; a control unit that receives the set signal and stores the set engine revolution speed, receives the set signal and an ON/OFF signal to output an output signal corresponding to the received set signal and the ON/OFF signal, and controls operation of the engine at the set engine revolution speed in accordance with the ON/OFF signal; and a display that receives the output signal to visually output the setting process or whether or not the engine is driven at the set engine revolution speed. | 07-22-2010 |
20100133042 | FOOTSTEP FOR EXCAVATOR - A footstep for an excavator is provided, in which the footstep, that is fixed to a track side frame so that an operator can get on/off a cab and so on therethrough, can be prevented from being damaged by rocks and so on during operation of the excavator in an inferior working environment. The footstep for an excavator, mounted on a track side frame of the excavator, includes an upper step composed of side plates formed on left and right sides to face each other, and a front plate formed in a body with the side plates and having through-holes formed on left and right sides thereof, to protect a head part of a fastening member, which fixes the footstep to the side frame, from an external impact; a fixing plate having both ends fixed to inner surfaces of the side plates to fix the upper step to the side frame by the fastening member that is fastened to pass through the through-holes; and a lower step fixed to lower ends of elastic pieces having upper ends fixed to the side plates, respectively. | 06-03-2010 |
20100058666 | SLIDING DOOR SAFETY DEVICE FOR HEAVY CONSTRUCTION EQUIPMENT - A sliding door safety device for heavy construction equipment is provided, which includes an outer side wall having a doorway formed thereon, an upper rail and a lower rail formed on an upper part and a lower part of the outer side wall, respectively, a sliding door sliding to move to a front or rear side of a cab by an upper roller and a lower roller engaged with the upper rail and the lower rail, respectively, to open or close the doorway, and first and second door position sensing switches mounted on one side of the outer side wall to sense a door position when the door is in its open position where the door is fully opened or in its closed position where the door is fully closed. | 03-11-2010 |
20100045092 | METHOD AND AN ARRANGEMENT FOR PREVENTING OVERTURNING A DUMP VEHICLE - A method for preventing overturning a dump vehicle, the vehicle including a forward vehicle section with a forward frame and a wheel axle supported by the frame. The dump vehicle further includes a rear vehicle section with a rear frame and at least one wheel axle supported by the frame. The dump vehicle further includes an articulation joint, which connects the forward frame and the rear frame and allows the forward frame and the rear frame to pivot in relation to each other about an axis extending in a longitudinal direction of the vehicle. During a tilting procedure for unloading material from a container of the dump vehicle, the method includes determining if there is a risk for a pair of wheels of the wheel axle of the forward vehicle section to lose ground contact or if the pair of wheels have already lost ground contact. A warning signal for preventing an uncontrolled rotation of the forward vehicle section relative to the rear vehicle section via the articulation joint is further established when it is determined that the wheels of the forward wheel axle have lost or are about to lose ground contact. | 02-25-2010 |
20100043420 | HYDRAULIC SYSTEM FOR CONSTRUCTION EQUIPMENT - A hydraulic system for construction equipment is provided, which can increase the driving speed of a corresponding working device by making hydraulic fluid of a hydraulic pump, which is added to the hydraulic system having two hydraulic pumps in the construction equipment, join hydraulic fluid on the working device side, and can intercept the supply of hydraulic fluid from the working device side to a traveling apparatus side when the working device and the traveling apparatus are simultaneously manipulated. | 02-25-2010 |
20100031648 | HYDRAULIC FLOW SHARING SYSTEM FOR EXCAVATING AND PIPE LAYING WORK - A hydraulic flow sharing system for excavating and pipe laying work is provided, which can prevent the abrupt change of a traveling speed during traveling through compulsory sharing of the flow rate applied to a working device and a traveling apparatus when a combined operation, in which the traveling apparatus and the working device such as a boom are simultaneously driven, is performed. | 02-11-2010 |
20090217491 | ATTACHMENT MEANS AND A METHOD FOR FASTENING VEHICLE PANELS USING SAID ATTACHMENT MEANS - Patent An attachment arrangement and a method for attaching a panel to a supporting structure on a vehicle are provided. The attachment arrangement includes a profile with a first section extending outwards from the supporting structure and a second section extending in a plane substantially parallel to the supporting structure, wherein the second section is arranged to extend into a recess in an outer edge along one side of the panel. | 09-03-2009 |
20090071765 | Arrangement for Reducing a Rotational Speed of a Rotating Member - An arrangement for reducing a rotational speed of a rotating member includes a first and second pressure member arranged at a distance from each other and an opposite sides of the rotating member for movement relative to each other between a retracted position and a forward position engaging the rotating member. The arrangement includes an adjustment device including a friction structure forming a friction joint with one of the pressure members for maintaining a position relative to one another provided a maximum friction force is not exceeded. The arrangement further includes a spring acting on the friction structure for separating the pressure members after having been compressed. The spring has a gradually increasing spring force between a non-compressed state and a totally compressed state. An intermediate spring force value of the spring, which corresponds to compression of the spring to an extent less than the totally compressed state, equals a maximum friction force of the friction joint so that the friction structure is forced to move relative to the pressure member, with which it forms the friction joint, when the maximum friction force is exceeded. | 03-19-2009 |
20080290724 | Wheel Axle Bearing Arrangement - A wheel axle bearing arrangement includes a wheel axle housing and a wheel axle support, which is configured to be rigidly connected to a vehicle frame, and a bearing arrangement configured to pivotably mount the wheel axle housing relative to the wheel axle support. The bearing arrangement includes at least two bearing sleeves arranged side by side. | 11-27-2008 |
20080268998 | Planet Transmission, Drive Device Comprising the Planet Transmission and Vehicle Comprising the Drive Device - A planetary transmission includes a sun gear, which constitutes an input drive to the planetary transmission, a ring gear arranged around the sun gear, and a planet carrier which is designed to rotate and which carries at least one planet wheel, which planet wheel meshes with the sun gear and the ring gear. The planet carrier constitutes an output drive from the planetary transmission. The planetary transmission further includes a wet disk brake, a first set of brake disks in the brake being rotationally locked to the planet carrier and thereby in operation rotating at the rotational speed of the planet carrier. The planetary transmission further comprises an arrangement for circulation of a cooling fluid through the brake which is rotationally locked to the sun gear and thereby in operation rotates at the rotational speed of the sun gear. | 10-30-2008 |
20080265646 | Foldable Armrest - An armrest for a vehicle seat includes a seat cushion and a backrest. The armrest is intended to be turned around a pivot axis between a first active position and a second folded-away position. The armrest includes an upper part, which in the active position is positioned with its longitudinal axis essentially parallel to an essentially vertical plane through a side surface constituting an outer edge surface of the vehicle seat and intended to support a user's forearm, and at least one lower part provided with a fixing device for attaching the upper part to the vehicle seat. The lower part includes a linking mechanism arranged for setting the upper part in a transverse direction between a first position outside the side surface and an adjustable second position, and a locking device that is arranged to activate a catch that locks the upper part in a set position after it has been moved to the second position. The invention also relates to a vehicle seat provided with such an armrest and to a vehicle including such an armrest. | 10-30-2008 |
20080262685 | Method For Performing Gear Shifting - A method for performing gear shifting by engaging a coupling element with a gear wheel includes moving the coupling element relative to the gear wheel from a disengaged position to an engaged position, in which a particular gear is selected. A speed of the coupling element relative to a speed of the gear wheel is controlled during movement of the coupling element so that a speed difference is maintained until the coupling element reaches the engaged position. | 10-23-2008 |
20080229873 | Shift Member and Gear Shifting Arrangement Comprising the Shift Member - A shift member for gear shifting in a gear box is provided. The shift member is cylindrical and it includes an arrangement for activating different gears at different angular positions of the shift member and an actuation part for effecting pivoting of the shift member when actuated. The shift member actuation part includes an actuation structure with angularly spaced depressed portions and projecting portions. A gear shifting arrangement is also provided and includes the shift member and an actuation system including at least one actuation member for selective engagement with the actuation structure at different positions in the circumferential direction of the shift member for a stepwise rotation of the shift member. | 09-25-2008 |
20080221771 | Method for Controlling Rotation Speed - A method for controlling the rotational speed of at least one rotating element in a vehicle's drive line is provided. A first control model and a second control model are defined. The first control model calculates a permitted slippage of at least one of the vehicle's ground-engaging elements at its point of contact with the ground, which ground-engaging element is driven via the rotating element. The second control model calculates a torque delivered to the said ground-engaging element. The result of one of the said control models is utilized for controlling the rotational speed of the rotating element. | 09-11-2008 |
20080213075 | System and a Method of Controlling the Tilting of a Loadcarrying Implement of a Movable Work Machine, and a Movable Work Machine - A system is provided for controlling the tilting of a load-carrying implement of a movable work machine that includes a frame and the implement, pivotally connected to the frame, and a tilting arrangement for tilting the implement in relation to the frame. The system includes a control for controlling the tilting of the implement based upon a sensor-registered movement of the movable work machine, and for controlling the tilting of the implement such that the implement counteracts the inertia of a load carried by the implement. | 09-04-2008 |
20080210505 | Method for Damping Relative Movements Occurring in a Work Vehicle During Advance - A method for damping relative movements occurring between a first and a second part of a work vehicle during advance of the vehicle, which parts are interconnected by means of at least one hydraulic actuator, includes detecting at least one operation parameter of the vehicle, determining whether a damping condition is present based on the detected operation parameter and if the determined damping condition is present, controlling a displacement of a variable displacement hydraulic motor arranged downstream of the actuator in such a way that energy from a hydraulic fluid transmitted from the actuator is converted to a rotational energy in the motor, and transmitting the recovered energy from the motor to a power source. | 09-04-2008 |