Patent application number | Description | Published |
20090050827 | LUBRICANT DETERIORATION DETECTING DEVICE AND DETECTING DEVICE INCORPORATED BEARING ASSEMBLY - To provide a lubricant deterioration detecting device having a high degree of freedom in arranging within the bearing assembly or the like and capable of stably detecting the status of deterioration of the lubricant without being affected by the thickness of the lubricant and a change in temperature and also to provide a detector incorporated bearing assembly equipped with such lubricant deterioration detecting device, the lubricant deterioration detecting device includes a light source, a plurality of light detecting components for detecting rays of light emitted from the light source and subsequently transmitted through a lubricant, and a determining unit. The plural light detecting components have respective light detecting faces sequentially displaced in position. The determining unit compares respective signal strengths of outputs from the plural light detecting components to detect the status of deterioration of the lubricant. | 02-26-2009 |
20090072819 | Rotation Angle Detector and Bearing with Rotation Angle Detector - To provide a rotation angle detecting device, in which undesirable noises from an angle calculating circuit can be reduced to increase a detection accuracy, outputs of four linear magnetic sensor arrays arranged on a non-rotatable member confronting a magnetic generating element and arranged in a plane perpendicular to the axis of rotation, the sensor arrays being arranged along four sides of an imaginary rectangular shape, are read out by signal read-out circuits, and then converted into digital signals by AD converting circuits in order to calculate an angle of rotation of the magnetic generating element by an angle calculating circuit. The signal read-out circuits and the AD converter circuits are arranged outside of the magnetic sensor arrays arranged in a generally rectangular pattern, and the angle calculating circuit is arranged inside of the magnetic sensor arrays, all being mounted on a semiconductor chip. | 03-19-2009 |
20090102468 | Rotation sensor and bearing assembly using the same - A rotation sensor includes a magnetic sensor array ( | 04-23-2009 |
20090123098 | Bearing With Rotation Detection Device - To downsize a bearing assembly with a rotation detection device, a magnetic generating element ( | 05-14-2009 |
20090199660 | Bearing for Wheel with Sensor - To provide a sensor incorporated wheel support bearing assembly, in which a load sensor can be compactly installed in an automotive vehicle, the load acting on the vehicle wheel can be detected with high sensitivity and the manufacturing cost can be reduced, the bearing assembly having a plurality of rows of rolling elements interposed between an outer member and an inner member includes a sensor unit fitted to one of the outer member and the inner member, which serves as a stationary member. The sensor unit includes a sensor mounting member and a strain sensor fitted thereto. The sensor mounting member has two contact fixing portions fixed to the outer member and a first contact fixing portion is fixed to a flange surface of the outer member and a second contact fixing portion is fixed to a peripheral surface of the outer member. | 08-13-2009 |
20090263061 | Bearing with Rotation Detecting Device - A bearing assembly with a rotation detecting device ( | 10-22-2009 |
20090301222 | SENSOR-EQUIPPED BEARING FOR WHEEL - There is provided a sensor equipped wheel support bearing assembly with rolling elements interposed between outer and inner members and with a strain sensor fixed to a stationary member served by one of the outer and inner members. The strain sensor includes a strain generating member and a sensor element secured thereto. The strain generating member has first and second contact fixing segments respectively associated with a flanged face provided in the outer member and a peripheral surface of the stationary member. These contact fixing segments have a joint region therebetween having a bent portion convexed toward the outer member. A location in the strain generating member where the sensor element is secured is on the first contact fixing segment side of the bent portion and yet in the vicinity of the bent portion. | 12-10-2009 |
20090320567 | Broken piece detecting sensor - To provide a broken piece detecting sensor assembly capable of stably detecting broken piece admixed in a fluid, which broken piece is made of material characterized by non-metal, non-magnetic and non-electroconductive characteristics such as ceramics. This broken piece detecting sensor assembly is a sensor for detecting broken piece admixed in a fluid. Provided are two opposed flat plates, a shift mechanism for moving at least one of the two flat plates in a confronting direction to allow the broken piece to be sandwiched between those two flat plates, and measuring and determining section. The measuring and determining section is operable to measure the distance between the two flat plates to thereby detect the presence or absence of the broken piece, the size of the broken piece or the amount of the broken piece accumulated. | 12-31-2009 |
20100001720 | ROTATION SENSOR-EQUIPPED BEARING DEVICE FOR WHEEL - A rotation sensor equipped wheel support bearing assembly detects rotational speed and rotational direction, in which a high resolution rotation signal is utilized in various vehicle controls with a suppressed size. The bearing assembly includes a plurality of rows of rolling elements between rolling surfaces in outer and inner members. A magnetic field generating element having anisotropy about a bearing center axis is provided in the outer member in alignment with the axis. The inner member is provided with a sensor for sensing the magnetic field of the magnetic field generating element oriented axially. The sensor detects the angle of rotation of the magnetic field generating element and is in the form of magnetic sensor arrays or elements for detecting the orientation of the magnetic field with a two-dimensional vector sensor to detect rotation of the magnetic field generating element. | 01-07-2010 |
20100040315 | Rotation detector,wheel bearing equipped therewith and process for manufacturing the same - A sensor assembly ( | 02-18-2010 |
20100046871 | SENSOR-EQUIPPED BEARING FOR WHEEL - To provide a sensor equipped wheel support bearing assembly, in which a load sensor can be installed compactly in an automotive vehicle, maintaining a high sensitivity while damage and/or malfunction caused by the external environments and/or the electromagnetic noises are avoided, with low manufacturing cost. This bearing assembly includes outer and inner members having respective rolling surfaces and a plurality of rows of rolling elements interposed between those rolling surfaces. A strain sensor unit including a sensor element is fitted to one of the outer and inner members, which is a stationary member, for example, the outer member. A sensor mounting surface of the strain sensor unit fitted with the sensor element has a covering member made of a resin, which is over-molded, or an elastomer bonded by vulcanization, so as to cover the sensor element sealingly. | 02-25-2010 |
20100066352 | Rotation detector and rotation detector-equipped bearing - A rotation detecting device capable of outputting information on the absolute angle using an ABZ phase signal and without extra operation and procedures required, and a bearing assembly having this rotation detecting device incorporated therein are provided. The device includes an absolute angle detecting sensor unit for detecting the rotation angle of a rotating member as an absolute angle and a rotation pulse signal generating section for generating a rotation pulse signal including an index signal corresponding to a zero phase of the absolute angle detecting sensor unit and a pulse signal of a constant interval, based on the absolute angle detected by the absolute angle detecting sensor unit. The rotation pulse signal is outputted in an absolute angle output mode, under which the rotational pulse signal is outputted from a time the index signal is outputted to the current absolute angle. | 03-18-2010 |
20100102801 | ROTATION SENSOR - A rotation detecting sensor, having excellent sealing capability to prevent water ingress from outside, being so robust that no damage occur in sensor component parts and circuits due to external force and/or thermal strains resulting from self-heating or change in ambient temperature, and inexpensive to manufacture, is provided. The rotation detecting sensor is fixed to a sensor fixing member to be fitted to a wheel support bearing assembly. A sensor unit, including a magnetic sensor element, a cable and a substrate, is fixed to the sensor fixing member through the substrate. A molding segment molded of a molding material bonded with the substrate is provided around the sensor unit. The substrate has a metallic pattern portion formed as a metallic coating on a substrate surface in the vicinity of an electroconductive pattern portion and the molding material is bonded to the metallic pattern portion. | 04-29-2010 |
20100129016 | SENSOR EQUIPPED WHEEL SUPPORT BEARING ASSEMBLY - This wheel support bearing assembly includes an outer member ( | 05-27-2010 |
20100129017 | SENSOR-EQUIPPED BEARING FOR WHEEL - A sensor-equipped wheel support bearing assembly, in which a load imposed on the wheel can be accurately detected without influences from hysteresis is provided. This wheel support bearing assembly includes an outer member having a plurality of rolling surfaces, an inner member having rolling surfaces opposed respectively to the rolling surfaces of the outer member, and rolling elements between the rolling surfaces. A sensor unit is provided in a stationary member of one of the outer and inner members, which unit includes a strain generating member having two contact fixing segments to be fixed to the stationary member and a sensor fitted to the strain generating member for detecting a strain induced in this strain generating member. The two contact fixing segments are arranged at respective positions held at the same phase in a direction circumferentially of the stationary member. | 05-27-2010 |
20100157304 | LUBRICANT DETERIORATION DETECTING DEVICE AND DETECTING DEVICE INCORPORATED BEARING ASSEMBLY - A lubricant deterioration detecting device has a light emitting unit and a light receiving unit so arranged as to define a gap therebetween for accommodating a lubricant forming an object to be detected, and a determining circuit for determining a light transmittance of the lubricant in reference to an output from the light receiving unit to thereby detect a status of deterioration of the lubricant. | 06-24-2010 |
20100202718 | WHEEL BEARING WITH SENSOR - A sensor-equipped wheel support bearing assembly capable of accurately detecting load without affected by hysteresis is provided. The assembly includes a vehicle body fitting flange having bolt holes at respective circumferential portions in the form of projecting pieces. A sensor unit including a strain generating member having contact fixing segments to be fixed to the stationary member and a cutout portion, and a sensor element for detecting strain in a periphery of the cutout portion is provided with the contact fixing segments at positions of the same size in an axial direction relative to the outer diametric surface of the stationary member. The contact fixing segments are spaced each other an angle about an axis of the stationary member, and the angle between the contact fixing segments at respective end portions of the sensor unit is smaller than half the angle between the projecting pieces. | 08-12-2010 |
20100225307 | Rotational Angle Detector And Rotational Angle Detector Incorporated Bearing Assembly - To provide a rotational angle detecting device for securing accurate information on the rotational angle without time lag and a detector incorporated bearing assembly having the rotational angle detecting device, a magnet having an anisotropy in a circumferential direction about the rotation axis is mounted on a rotating member and a magnetic sensor having magnetic sensor elements is arranged on a stationary member so as to confront the magnet. An angle calculating unit for measuring an intensity of magnetic field of the magnet from an output of the magnetic sensor elements and for detecting the rotation angle of the rotating member based on the measured value, and a delay time correcting unit for correcting a delay time between detection of the magnetic field of the magnet by the magnetic sensor elements and output of a detected angle from the angle calculating unit are employed. | 09-09-2010 |
20100225309 | ROTATION DETECTING DEVICE AND BEARING ASSEMBLY EQUIPPED WITH SUCH ROTATION DETECTING DEVICE - A rotation detecting device includes a plurality of magnetic encoders disposed coaxially and having respective numbers of magnetic poles different from each other and a plurality of magnetic sensors for detecting respective magnetic fields emanating from those magnetic encoders. Each of the magnetic sensors is in a ring form and obtains the position information within the magnetic poles of the associated magnetic encoder. A phase difference detector determines the difference in phase between magnetic field signals detected respectively by the magnetic sensors. An angle calculator is provided, which is operable on the basis of the difference in phase so detected to calculate an absolute angle of each of the magnetic encoders. A corrector corrects the initial phase difference occurring in the magnetic field signals, detected respectively by the magnetic sensors, as a result of the fitting position of the magnetic encoders. | 09-09-2010 |
20100262383 | SENSOR-EQUIPPED BEARING FOR WHEEL - There is provided a sensor equipped wheel support bearing assembly including an outer member having an inner periphery formed with a plurality of rolling surfaces defined therein, an inner member having an outer periphery formed with rolling surfaces opposed to those rolling surfaces and a plurality of rows of rolling elements interposed between those rolling surfaces. One of the outer and inner members serving as a stationary member is provided with a strain amplifying mechanism for amplifying a strain in the stationary member, which occurs when the rolling elements pass by. A strain sensor element is provided for detecting the strain amplified by the strain amplifying mechanism. A calculator is provided for calculating from an output of the strain sensor element, the load acting on the bearing assembly or the load acting between the vehicle wheel and the road surface. | 10-14-2010 |
20100303394 | SENSOR-EQUIPPED BEARING FOR WHEEL - A sensor-equipped wheel support bearing assembly capable of accurately detecting load acting on the vehicle wheel by reducing concentration of strain on a cutout portion corner area of a strain generating member in a sensor unit is provided. The wheel support bearing assembly having rolling elements interposed between rolling surfaces in outer and inner members, includes at least one sensor unit provided in a stationary member, which is one of the outer and inner members. The sensor unit includes a strain generating member, having two or more contact fixing segments secured to the stationary member in contact therewith, and a sensor fitted to the strain generating member for detecting a strain in the strain generating member. The strain generating member has a cutout portion between the contact fixing segments, and corner area of such cutout portion is of an arcuately sectioned shape. | 12-02-2010 |
20100310202 | SENSOR EQUIPPED WHEEL SUPPORT BEARING ASSEMBLY - A wheel support bearing assembly includes rolling elements ( | 12-09-2010 |
20110125421 | WHEEL BEARING WITH SENSOR - A sensor-equipped wheel support bearing assembly capable of accurately detecting the load acting on the bearing assembly is provided. The sensor-equipped wheel support bearing assembly includes a sensor unit in an outer member that serves as a stationary member. The sensor unit includes a strain generating member, having two or more contact fixing segments to be fixed to the stationary member, and two or more sensors for detecting strain in the strain generating member. The contact fixing segments are spaced from each other in a direction circumferentially of the stationary member at the same axial positions. An estimating section is provided in the bearing assembly for estimating load thereon based on the difference between respective output signals from the sensors by calculating amplitudes of the output signals or values corresponding to such amplitudes from the difference between the respective output signals. | 05-26-2011 |
20110127995 | ROTATION SENSOR - A rotation sensor fixed to a sensor fixing member with simplified fixing system and excellent in water proofing property and vibration proofing property is provided. The rotation sensor includes a sensor unit having a magnetic sensor element for detecting rotation of a to-be-detected element provided in a rotating ring, a cable for drawing an output signal of the sensor element to the outside, and a substrate with an electroconductive region for electrically connecting the sensor element and a core line of the cable while the sensor element and the cable are fitted to the substrate. The substrate has at least one recess portion or projection portion engageable with a projection portion or recess portion in the sensor fixing member to fix the sensor unit to the sensor fixing member. A molding segment formed by molding is provided for covering the sensor unit. | 06-02-2011 |
20110158570 | ROTATION DETECTING DEVICE AND BEARING WITH ROTATION DETECTING DEVICE - A rotation detecting device, which is simple in structure and capable of detecting the absolute angle accurately with a high resolution, includes a plurality of ring-shaped magnetic encoders provided concentrically with each other and having different numbers of magnetic poles, each of the magnetic encoders having a magnetization row pattern with magnetic poles arranged circumferentially thereof; a plurality of magnetic sensors each operable to detect a magnetic field emanating from the corresponding magnetic encoder; and an angle calculating unit for determining an absolute angle of the magnetic encoders based on magnetic field signals detected by the magnetic sensors; in which the magnetic encoders are fitted to at least one core metal that is formed integrally with a projection portion protruding towards an encoder support surface side, on which the magnetic encoders are mounted, the projection portion being situated between the neighboring magnetic encoders. | 06-30-2011 |
20110291780 | Method of magnetizing magnetic encoder and magnetizing apparatus - A magnetic encoder magnetizing method, in which magnetization of the plural neighboring tracks of the magnetic encoder can be accurately performed, is provided. While an annular magnetic body having a plurality of annular, unmagnetized magnetic encoder tracks integral therewith and juxtaposed relative to each other is rotated, the tracks of the magnetic encoder are individually magnetized by a magnetizing head, made up of a magnetizing yoke and an exciting coil, to thereby provide the magnetic encoder. In the practice of this magnetizing method, when one of the tracks of the magnetic encoder is magnetized, the other track is covered with a magnetic shielding mask. | 12-01-2011 |
20110309824 | ROTATION DETECTING DEVICE AND BEARING HAVING ROTATION DETECTING DEVICE - Provided are a rotation detecting device that highly precisely detects absolute angle with low noise, as well as a bearing assembly with such a rotation detecting device. Such a rotation detecting device includes magnetic encoders arranged coaxially with different number of magnetic poles as well as magnetic sensors that detect magnetic fields of those encoders. Each of the magnetic sensors can detect the encoders within each magnetic pole, and includes sensor elements as well as a phase detector that determines the phase of the sensor element in reference to a detected magnetic field signal and then outputs an ABZ phase signal. Such a rotation detecting device further includes a phase difference detector that determines a phase difference of the magnetic field signals in reference to an output from the phase detectors and an angle calculator that calculates the absolute angle of the encoders based on the detected phase difference. | 12-22-2011 |
20120014632 | SENSOR-EQUIPPED BEARING FOR WHEEL - A sensor-equipped wheel support bearing assembly capable of accurately estimating a load acting on a wheel, without the detecting accuracy deteriorated as a result of a long term use and/or a change in environment, is provided. The assembly includes a sensor unit provided in an outer member, which serves as a stationary member. The sensor unit has a strain generator and a sensor for detecting a strain occurring in the generator. A principal load estimator estimates the load acting on the wheel, with the use of an average value of a signal from the sensor, and an amplitude processed load estimator estimates the load, using amplitude of a signal wave outputted from the sensor, resulting from passage of rolling elements. A drift amount estimator estimates a drift amount of an estimated load output utilizing the average value and the amplitude, which is used to correct the estimated load. | 01-19-2012 |
20120086440 | ROTATION DETECTING DEVICE AND BEARING EQUIPPED WITH ROTATION DETECTING DEVICE - A rotation detecting device, which is compatible regardless of whether a process control device for processing an output signal of the rotation detecting device is standard one or new one having high input signal resolving power, and, also, a rotation detecting device equipped bearing assembly having such rotation detecting device, are provided. The rotation detecting device includes an encoder provided rotatably and having a plurality of circumferentially equidistantly arranged to-be-detected poles, and a sensor for detecting the to-be-detected poles. The use is made of a multiplying unit for multiplying the phase of the to-be-detected poles from an output of the sensor. The use is also made of a pulse outputting unit for receiving an output of the multiplying unit or both the output of the multiplying unit and an output of the sensor and output pulses having two multiplying powers different from each other. | 04-12-2012 |
20120105055 | ROTATION ANGLE DETECTOR FOR AUTOMOTIVE DRIVE MOTOR AND BEARING ASSEMBLY EQUIPPED WITH THE SAME - Provided is a rotation angle detection device for an automotive vehicle drive motor. The device includes a magnetic encoder including magnetic tracks with different numbers of magnetic poles. The magnetic tracks form coaxial rings. The device also includes magnetic sensors operable to sense the magnetic fields of the magnetic tracks. The magnetic sensors obtain information on a location within a magnetic pole of the magnetic tracks and generate magnetic field signals indicative of respective phases. The device further includes a phase difference determination unit that determines a difference between the respective phases of the magnetic field signals, an angle computation unit that computes an absolute angle of the magnetic encoder, based on the determined difference, and a signal output unit that outputs the computed absolute angle. The magnetic encoder is associated with an output shaft of the drive motor or with a bearing assembly equipped to the drive motor. | 05-03-2012 |
20130058121 | VEHICLE LAMP - A vehicle lamp includes a light source, a front cover made of a transparent material to transmit light emitted by the light source, a lamp body forming a lamp housing together with the front cover, and a vibrator configured to vibrate the front cover to generate a vibration sound. The vibrator is supported by the lamp housing such that the vibrator contacts the front cover at a location where, when the vehicle lamp is mounted on a vehicle, the vibrator is not visible from an outside of the vehicle lamp. | 03-07-2013 |