Abstract: An economically producible and compact encoder element for displaying an adjustment and/or movement of a bearing constituent. The encoder element has a carrier and a magnetic or magnetizable encoder layer applied flatly to the carrier. The encoder layer is formed from a matrix material which is liquid in its raw state and a magnetic powder added thereto, and is applied directly to a carrier surface in the liquid raw state by a coating method.

Abstract: An upper surface of an outer ring is disposed axially inwardly of an end surface of a larger-diameter annular portion of a cage, and an outer diameter of the end surface of the larger-diameter annular portion of the cage is larger than an inner diameter of a lower surface of the outer ring. Chamfered portions for facilitating the taking-out of an outer ring assembly from the lower side of a stack of outer ring assemblies are formed respectively at the end surface of the larger-diameter annular portion of the cage and the lower surface of the outer ring.

Abstract: A wheel speed measurement system for a drive axle is provided within a differential assembly. The system includes a differential side bearing adjustment ring configured for adjusting the position of a differential carrier bearing assembly. A tone ring is provided having an inner bore to accommodate a coaxial axle shaft. A retainer ring member is snap-fit between the differential side bearing adjustment ring and the tone ring, permitting relative rotation of the tone ring. Sensors are provided in sensor mounts integrally formed on an exterior of a differential assembly housing.

Abstract: Provided is a roller bearing device, which is suitable for preventing misdetection of a rotation sensor when a moment load is applied. A thin motor 100 includes a cross roller bearing 14 having an inner ring 14a and an outer ring 14b, a stator 22 supported by the inner ring 14a, a rotor 12 supported by the outer ring 14b, a motor unit 16 that applies rotation torque to the rotor 12, and a resolver 30 that detects a rotation angle position of the rotor 12. The resolver 30, the cross roller bearing 14, and the motor unit 16 are arranged in the recited order from the radially inner side on a radially identical plane.

Abstract: A rolling bearing assembly for a wheel includes a cylindrical fixed bearing ring fixed to a vehicle body side, a rotary bearing ring rotatably inserted to inside of the fixed bearing ring, and plural rows of rolling elements rollably arranged between the bearing rings. An annular sensor housing is attached to an inboard side end portion of the fixed bearing ring and includes a plurality of displacement sensors for detecting gaps between the displacement sensors and outer peripheral surfaces of inboard side end portions of the rotary bearing ring in a circumferential direction. Further, an inboard side end portion of the sensor housing is sealed by an inner side seal device.

Abstract: A rotating machine is disclosed including a rotor, a stator, a radial bearing arranged for supporting radial forces between the rotor and the stator by mechanical contacts and a bearing housing. The bearing housing is provided in the stator or the rotor in direct mechanical contact with the radial bearing and the rotating machine further comprises a thermal energy exchanger, arranged in the bearing housing, and a thermal controller. The thermal energy exchanger is capable of providing both heat and cold, and the thermal controller is arranged to control the thermal energy exchange during operation of the rotating machine. The rotating machine is typically a large machine, such as a refiner. A method for vibration control of a rotating machine is also disclosed comprising measuring properties related to vibrational properties.

Abstract: A sensing system for sensing the drive torque applied to a vehicle wheel end assembly (100). The sensor system (200) is integrated into the internal spaces of the bearing assembly (103) within vehicle wheel end assembly (100), and is protected from environmental conditions. The sensor system (200) incorporates a pair of spaced-apart sensing elements (202a, 202b) disposed on a stationary member (104) of the vehicle wheel end assembly (100) in alignment with the axis or rotation. A target element (300) disposed on the rotating member (102) of the vehicle wheel end assembly (100). Each sensing element (202a, 202b) generates a signal which is responsive to the passage of the target element (300), at a frequency which is proportional to the rotational speed of the wheel end assembly (100).

Abstract: A sensor-incorporated wheel support bearing assembly (18) includes an outer member (1) having an inner peripheral surface formed with double rows of raceway surfaces (4), an inner member (2) having an outer peripheral surface formed with raceway surfaces (5) opposed to the raceway surfaces (4) in the outer member (1), and double rows of rolling elements (3) interposed between the raceway surfaces (4) and (5) in the outer and inner members (1) and (2). Rings (9A) and (9B) each having an outer peripheral surface tapered is secured to the inner member (2). A displacement sensor (10) confronting the tapered outer peripheral surfaces of the rings (9A) and (9B) is mounted on the outer member (11) or a member (17) rigidly secured to the outer member (1) for measuring the distance between such displacement sensor (10) and the rings (9A) and (9B).

Abstract: An antifriction bearing (A) for accommodating rotation about an axis (X) comprises an inner race (2) having a raceway (12), an outer race (4) having a raceway (22), rolling elements (6) positioned between the inner and outer races (2, 4) and contacting the raceways (12, 22) of those races (2, 4) so that when relative rotation occurs between the races (2, 4) the rolling elements (6) roll along the raceways (12, 22), a cage (8) positioned between the inner and outer races (2, 4) and having pockets (40) in which the rolling elements (6) are received with the cage (8) being rotatable between the races (2, 4) as the rolling elements (6) roll along the raceways (12, 22), the outer race (4) having a power transmitting coil (50) and a receiver (60), the cage (8) having a power receiving coil (52), a sensing unit (D) for sensing a condition of the bearing (A), and a transmitter (54) for sending a signal indicative of the sensed condition of the bearing (A) to the receiver (60).

Abstract: A hub unit bearing H1 includes a rotational speed detector 9 which is made up of an encoder 6 and a sensor 8. A seal 5b on a side facing a center side of a vehicle includes a primary seal 5bp and a secondary seal 5bq which are disposed in that order in an axial direction from rolling elements 32 on a side facing the center side of the vehicle towards the center side of the vehicle so as to define a primary sealed space portion I between the vehicle's center side facing rolling elements 32 and the primary seal 5bp and a secondary sealed space portion II between the primary seal 5bp and the secondary seal 5bq, with the rotational speed detector 9 disposed within the secondary sealed space portion II.

Abstract: An annular recess is formed in a vehicle inner side of a wheel rolling bearing device. A protective cover is attached to an inner ring disposed in a bottom side of the recess to protect an annular magnetic encoder. A cover body of the protective cover is formed with an annular first disk portion covering the magnetic encoder, a cylindrical portion extending from a radial outer end of the first disk portion and fitted into an inner circumferential wall of the recess, and a second disk portion extending radially outward from an upper end of the cylindrical portion and covering the end portion of the outer ring located around the recess. The cover body is formed with a to-be-separated portion constituted by at least one of half-cut grooves and perforations extending in a radial direction of the cover body. The cover body is formed with lugs which are projected from the second disk portion.

Abstract: 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.

Abstract: The bearing assembly includes a rolling bearing including a rotatable raceway member and a stationary raceway member. This bearing assembly also includes a to-be-detected member carried by the raceway member and having a magnetic characteristic which cyclically varies in a direction circumferentially of the to-be-detected element and has a cycle matching with one complete rotation of the raceway member, a magnetic sensor unit carried by the raceway member in face-to-face relation with the to-be-detected member, and a magnetic detecting circuit to supply an electric power to the unit and to process an output signal from the unit to provide an output to an external circuit. The magnetic characteristic of the to-be-detected member represents a substantially sinusoidal waveform rising and falling more steeply than a sinusoidal waveform at a zero-crossing point.

Abstract: A vehicle wheel bearing apparatus has a wheel hub integrally formed with a peripheral wheel mounting flange at one end and a double row rolling bearing. The double row rolling bearing has an outer member integrally formed with a peripheral body mounting flange and with double row outer raceway surfaces. An inner member, including the wheel hub, is formed with double row inner raceway surfaces each arranged opposite to each of the double row outer surfaces. Double row rolling elements are freely rotatably contained between the double row outer and inner raceway surfaces. The double row rolling bearing is adapted to receive a predetermined preload. A separate outer or inner ring is arranged on at least one of the outer or inner members. A preload varying mechanism is arranged at an abutting portion between the outer and inner members to vary the preload applied to the bearing.

Abstract: A spindle device is provided with a temperature sensor for detecting the temperature of an antifriction bearing or the temperature of a part of either one of a housing and a spindle which part is influenced by a temperature change of the antifriction bearing, and an abnormality detection section for detecting the abnormality of the antifriction bearing based on the change speed of the temperature of the antifriction bearing detected by the temperature sensor, so that the abnormality of the antifriction bearing can be detected more precisely.

Abstract: A tapered roller bearing (1) comprises an inner ring (2), an outer ring (3), a plurality of tapered rollers (4) rollably disposed between the inner and outer rings (2, 3) and a cage (5) for holding the tapered rollers (4) at predetermined circumferential intervals, wherein (the circumferential length on the PCD)?(roller diameter×the number of rollers)<roller diameter. Further, the tapered rollers (4) are uniformly disposed such that the distance between rollers on the PCD is less than (the roller diameter/the number of rollers).

Abstract: The retaining plus is used for assembling or retaining an array of needle roller bearings in the center of a gear. The plug applies a spring force through a push ball and a wire retainer clip which separates a pair of the needle roller bearings and force the array of bearings together and against the inside diameter of the gear.

Abstract: A rolling bearing device, which has a first bearing ring, a second bearing ring, rolling bodies in a pathway region that is defined between the two bearing rings, a cage device for separating the rolling bodies, and a sensor system for generating a sensor signal relating to the relative rotation of the inner ring in relation to the outer ring. The sensor system is embodied in such a way that the sensor signal is collected on the basis of an interaction effect between a signal tapping element and a structure rotating with the cage device. Thus, it is advantageously possible to create rolling bearing devices which have an integrated sensor system and outer dimensions which correspond essentially to the standard outer dimensions for such rolling bearing devices. Moreover, standard rolling bearings can be modified to form inventive rolling bearings by replacement of the bearing sealing ring.

Abstract: A rotation detecting device that includes an electric power generator having a stator and a rotor, said rotor having a plurality of alternating opposite magnetic poles in a circumferential direction of the rotor, at least a first magnetic sensor mounted on either the stator or a support member for supporting the stator and operable to detect the alternating opposite magnetic poles in the rotor; and an electric power supply circuit for utilizing an electric power generated by the electric power generator as an electric power source for the at least first magnetic sensor.

Abstract: For machinery comprising rotary components attached to at least one drive shaft, at least one rotary bearing to position the drive shaft with a rotational freedom of movement about a drive shaft axis and associated stationary components, apparatus that comprises: a rotary backup bearing sleeve attached to the drive shaft proximate the bearing comprising a rotary radial surface relative to the drive shaft axis and a rotary axial surface relative to the drive shaft axis; and a stationary backup bearing collar mounted to one of the stationary components proximate the rotary backup bearing sleeve comprising a stationary radial surface relative to the drive shaft axis proximate the rotary radial surface with a predetermined axial clearance and a stationary axial surface relative to the drive shaft axis proximate the rotary radial surface with a predetermined axial clearance.

Abstract: A wheel speed detecting apparatus incorporated with a wheel bearing apparatus. The wheel speed detecting apparatus has an encoder, and an annular sensor holder arranged opposite to the encoder. The sensor holder has an annular fitting member formed from a steel plate. A holding portion is integrally molded with the annular fitting member. A wheel speed sensor is arranged opposite to the encoder. Several substantially circular arc notches are formed on the outer circumference of the holding portion so that portions of the periphery of the annular fitting member are exposed from the holding portion.

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus and a method for manufacturing the wheel bearing apparatus has a wheel speed detecting apparatus (21) with a sensor holder (22). The sensor holder (22) includes a steel annular fitting ring (24) to be fit onto the end of the outer member (4). A holding portion (25) of plastic resin is integrally molded with the annular fitting ring (24). A wheel speed sensor (26) is embedded in the resin. An inboard side seal (11) of the seals (11, 12) is arranged between the sensor holder (22) and the outer joint member (14). The maximum diameter of the sensor holder (22) and the constant velocity universal joint (3) is smaller than the inner diameter of the knuckle (N).

Abstract: A sensor-incorporated wheel support bearing assembly including double rows of rolling elements interposed between respective raceways of outer and inner members opposed to each other, a to-be-detected ring having an eccentric or multangular outer diametric shape provided in the inner member and displacement sensors provided on the outer member confronting the to-be-detected ring. In the bearing assembly, the displacement sensors have facing portion areas, variable and invariable, respectively, arranged with rotation of the to-be-detected ring.

Abstract: A core of a fixed-side sealing member has a fitting cylindrical part fitted with the fixed-side sealing member. An outer end portion of the fitting cylindrical part is insertion-molded to be disposed within a resin member. An outer edge portion of the fitting cylindrical part in an axial direction thereof is bent.

Abstract: A sensor-equipped bearing for a wheel rotatably supporting the wheel relative to a vehicle body includes an outer member (1) provided with a double-row raceway surface (3) on an inner periphery thereof, an inner member (2) provided with raceway surfaces (4) opposing to the raceway surfaces (3) of the outer member (1), one of the outer and inner members serving as a stationary member, double-row rolling elements (5) interposed between the outer and inner raceway surfaces, a sensor fitting member (22) fixed to a peripheral surface of the stationary member, and a plurality of strain sensors (23) attached to the sensor fitting member (22) for measuring a strain thereof.

Abstract: To hold a pulsar ring (1) of a magnetic rotary encoder well concentrically by a pressure inserting jig (4) when the pulsar ring is installed on a rotary body (3), the pulsar ring (1) comprises a metallic annular holder (10) and a pulsar main body (20) of a magnetic rubber material, the holder (10) comprises a disk portion (11) where the pulsar body (20) is bonded, a mounting tube portion (12) having a diameter smaller than the outer diameter of the disk portion (11) and being fixed to the rotary body (3), a fold-back portion (15) folded inward, and an intermediate portion (13) extending therefrom toward the mounting tube portion (12) so as to be separated from the disk portion (11), and the outer circumference of the fold-back portion (15) or a guide portion (22) mounted thereon is fitted to a circumferential wall portion (42) of the jig (4).

Abstract: 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.

Abstract: This wheel support bearing assembly includes an outer member (1), an inner member (2), and a plurality of rows of rolling elements (5) between opposed rolling surfaces (3) and (4) in both members. At least one sensor unit (19) is provided on the outer diametric surface of a stationary member selected from the outer member (1) and the inner member (2). The sensor unit (19) is made up of a strain generating member (20) having two or more contact fixing segments (20a) adapted to be fixed to an outer diametric surface of the stationary member in contact therewith and a sensor (21) fitted to the strain generating member (20) for detecting a strain induced in this strain generating member (20). A groove (25) is provided in the outer diametric surface of the stationary member at a location between the neighboring two contact fixing segments (20a) of the sensor unit (19).

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus has a wheel bearing with an outer member and an inner member. A sensor holder is injection molded from synthetic resin and is embedded with a wheel speed detecting sensor. The sensor holder is mounted on an inner side end of the outer member. The inner side seal of the seals includes an annular sealing plate, a slinger and a pulser ring. An anchoring portion is formed integrally with the metal core.

Abstract: A rolling bearing which has a sealing arrangement and a sensor component, particularly an encoder, which is fitted with a mounting flange. The rolling bearing further has an inner ring and an outer ring between which rolling members are arranged. The sealing arrangement is equipped with at least one sealing element between the inner ring and the outer ring. In order to provide a rolling bearing which can easily be retrofitted with a retrofit sensor, particularly a retrofit encoder, and is well protected against environmental influence, the sensor component that is fitted with the mounting flange is designed as a retrofit part, while at least one water discharge port is disposed in the region of the mounting flange.

Abstract: Intended is to prevent an output cable of a magnetic sensor, even if tensed, from coming out of a sensor unit. The output cable 16c of the magnetic sensor 16a, which extends outward in the tangential direction of an arcuate sensor holding portion 15a formed on an annular core member 15 from a sensor unit mounted in the sensor holding portion 15a, is fixedly molded in a mold resin 17b which is fixed in a through hole 15c formed in the sensor holding portion 15a near the sensor unit 16. As a result, the output cable 16c is prevented, even if tensed, from coming out of the sensor unit 16.

Abstract: A magnetic encoder is provided which can prevent a magnetized member from being separated from a fixed member to which the magnetized member is fixed under a severe temperature environment. The encoder includes a fixed member which is fixed to a rotating member and a magnetized member 15 which is attached to the fixed member. The magnetized member 15, which is molded by mixing a magnetic powder in a resin, is bonded to the fixed member with a silicone resin based adhesive, and a thickness of an adhesive layer of the silicone resin based adhesive is 50 ?m or more and 100 ?m or less. In addition, an adhesive surface 17 of the fixed member with the magnetized member 15 is worked to be roughened.

Abstract: The instrumented rolling bearing device comprises a rotating ring 5, a non-rotating ring 4, and a detection assembly 3 equipped with a sensor unit 11 comprising an external annular portion 11b and a means of axially retaining the sensor unit on the non-rotating ring positioned on the external annular portion 11b. The outside diameter of the external annular portion 11b is smaller than the inside diameter of a frontal radial surface 4b of the non-rotating ring.

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member, an inner member, double row rolling elements, a sensor holder, and a pulser ring. The sensor holder cover has a cylindrical fitting portion press-fit onto the inner side end portion of the outer member. A flange portion extends radially inward from the fitting portion. The flange portion is in close contact with the end face of the outer member. A bottom portion extends further radially inward from the flange portion. The holding portion is integrally joined to the bottom portion. The flange portion is formed with a flat surface so that it forms an abutting width larger than 5 mm or more, against the end face of the outer member, or larger than 50% or more, relative to the flat width of the end face of the outer member.

Abstract: To reduce an installing space and simplify a mounting structure of a sensor (40) of a rotary encoder, a sealing device with a sensor has a retainer (10) having a fitting tube section (11) and an installation flange section (12) expanding outside thereof and fixed to an engine block (2), and a sealing device body (20) fitted to the fitting tube section (11) and slidably contacted with an outer surface of the crank shaft (4), a sensor (40) detecting a rotation of a pulsar ring (30) rotating together with the crank shaft (4) is attached to a sensor installation section (13) in the installation flange section (12), and a pulsar body (32) of the pulsar ring (30) is formed in a cylindrical shape and extends in a circumferential direction coaxial with the fitting tube section (11) between the fitting tube section (11) and the sensor installation section (13).

Abstract: A wheel support bearing assembly includes an outer member inserted in a knuckle, an inner member made up of a hub axle, double rows of rolling elements, and a cover closing an opening of one end of the outer member. The cover includes a sensor connector and a sensor cap. A pulsar ring is mounted on the inner race and a rotation sensor is opposed to the pulsar ring and embedded in the sensor connector. The cover extends over an outer surface of the sensor connector. The cover has a cylindrical portion mounted in an inner peripheral surface of one end of the outer member, which end forms a pilot portion for the knuckle. The cylindrical portion of the cover has an outer periphery provided with an annular elastic member held in contact with an inner peripheral surface of the knuckle.

Abstract: A wheel bearing apparatus for a driving wheel is formed as a unit of a wheel hub, a double row rolling bearing and a constant velocity universal joint. The double row rolling bearing has an outer member with a body mounting flange mounted on a knuckle and double row outer raceway surfaces. An inner member includes the wheel hub and an outer joint member of the constant velocity universal joint. The wheel hub has an inner raceway surface corresponding to one of the double row outer raceway surfaces. The outer joint member has another inner raceway surface corresponding to the other of the double row outer raceway surfaces. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces. Seals are mounted in an annular space opening formed between the outer member and the inner member. A sensor is fit into a mounting aperture formed in the knuckle. A pulser ring is mounted on the outer circumferential surface of the outer joint member.

Abstract: A speed sensor for a wheel end that has an interior that is substantially isolated from an atmosphere around the wheel end. The speed sensor is carried by a housing of the wheel end for monitoring the rotation of the wheel end and indicating the angular velocity of the wheel end. The speed sensor includes a cable leading from the sensor to a location remote from the wheel end and further includes leads that transmit a signal and a sheath that encloses the leads. The sheath is open enough to allow a fluid to flow through its interior. A vent channel provides communication between the interior of the wheel end and the interior of the sheath on the cable.

Abstract: An encoder 12 a characteristic of which is changed alternately at an equal interval in a circumferential direction is supported/fixed onto a hub 4 concentrically with the hub 4. A sensing portion of a sensor 13 supported on the outer ring 3 is positioned in close vicinity to a sensed surface of the encoder 12 to face thereto. Width dimensions of first and second sensed portions provided onto the sensed surface are changed continuously in a direction along which a to-be-sensed load is applied. Since a pattern according to which an output signal of the sensor 13 is changed is changed pursuant to a change of the load, the load is derived by observing this pattern. The output signal is also utilized to sense a rotation speed of the hub 4 in ABS or TCS control.

Abstract: In a bearing unit (10), at least one sensor device (20, 21) is locked in a recess (16, 17) formed in a superficial zone of one of the races (11, 12). The stationary race (11) is partially covered with an electrically insulating material (30). An uncovered surface zone (32) is provided for electrically connecting the stationary race (11) to an electrical supply source located outside the bearing unit.

Abstract: In a bearing constituted by a plural-layer slide member, the plural-layer slide member comprises a resin layer of polytetrafluoroethylene as a slide member and a backing strip to which the resin layer is bonded. A fitting hole having a depth exceeding the thickness of the resin layer is formed from the resin layer side. A temperature measuring metallic member formed of a white metal is fitted in the fitting hole. A temperature sensor is positioned within the temperature measuring metallic member. This bearing permits an accurate detection of its temperature. Further, in an oil cooled screw compressor having a bearing lubricating oil supply pipe, a slide surface of the bearing is covered with polyether ether ketone. Even if foaming occurs in the oil, it is possible to prevent the occurrence of a mechanical trouble such as galling.

Abstract: A vehicle wheel speed sensor 10 includes a cover member 21 having a mounting hole 26, a detection unit 31, a connector terminal 38, and a connector 61. The connector 61 is arranged on a surface of the cover member 21 at a side opposite to a rotor 17. The detection unit 31 is arranged on a surface of the cover member 21 at a side of the rotor 17. The detection unit 31 includes a Hall device 32, which detects change in a magnetic flux caused by rotation of the rotor 17. A connector terminal 38 is electrically connected to the Hall device 32 and is inserted in the mounting hole 26 of the cover member 21 and in the connector 61. A resin molding portion 71 integrates the detection unit 31 and the connector 61 through the mounting hole 26 to integrate the cover member 21, the connector 61, and the detection unit 31.

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member, inner member and double row rolling elements rollably contained between the inner and outer raceway surfaces of the inner and outer members. Seals are mounted in annular openings formed between the outer member and the inner member. An annular sensor holder, a steel base, and a magnetic encoder integrally adhered to the base are coupled with the inner and outer members. A slinger is positioned on the inner ring so that an axial gap is formed between the base and the slinger.

Abstract: The magnetic encoder is constituted by integrally bonding a magnet portion obtainable by forming a magnetic material containing a magnetic powder and a binder for the magnetic powder in a circular ring shape to a slinger. The binder contains at least a thermoplastic resin and an impact resistance-improving agent.

Abstract: 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.

Abstract: In a wheel supporting rolling bearing unit in which pitch circle diameters of balls 6a, 6b in an outside row and an inside row are made different, contact angles ?OUT, ?IN of the balls 6a, 6b in the two rows in a completed state are equal to each other. Initial contact angles ?OUT, ?IN of the two rows are smaller than predetermined contact angles ?OUT, ?IN. The extent [?IN??IN] to which the initial contact angle ?IN of the balls 6b, 6b in the inside row is made smaller than the predetermined contact angle ?IN of the balls 6b, 6b is made larger than the extent [?OUT??OUT] to which the initial contact angle ?OUT of the balls 6a, 6a in the outside row is made smaller than the predetermined contact angle ?OUT of the balls 6a, 6a {[?IN??IN]>[?OUT??OUT]}. By this configuration, imparting the predetermined contact angles ?OUT, ?IN to the balls 6a, 6b in the two rows in the completed state, and the preloads and contact angles of the balls 6a, 6b in the two rows are made proper.

Abstract: To provide a rolling-bearing sensor attaching sealing device capable of ensuring a sufficient magnetic force with respect to a sensor and a vehicle rolling bearing using the same. A vehicle rolling bearing 1 according to the invention includes a sensor attaching sealing device including an annular slinger 10 fixed to an inner shaft 2; a magnetic encoder 11 fixed to the slinger 10 so as to be integrally rotatable; and a sensor part 12 which includes a metal core 14 fixed to an outer ring 3 and provided with a seal member 15 slidably contacting with the slinger 10 and a magnetic sensor 13 detecting a relative rotation between the outer ring 3 and the inner shaft 2 by a variation of a magnetic pole using the magnetic encoder 11. The magnetic encoder 11 is formed by a plastic magnet which contains magnetic powders oriented with a magnetic field in a predetermined direction.

Abstract: A method for detection and quantitative evaluation of a balance error occurring in a component-bearing system. Static and dynamic forces acting upon the bearing are determined by sensors of a measuring bridge, which are disposed on a rolling bearing and which change the inherent electrical resistance according to the applied pressure, and are made available for analysis in a computer in the form of a periodic test signal that is common to both forces. In order to analyze the test signal, the weighted average of the modulation frequency generated by a balance error and the weighted mean variance thereof are determined from the test signal. The variance is then compared with a given variance threshold value. A variance lying below the variance threshold value is considered to be an indication of a significant balance error in the bearing.

Abstract: In a wheel support bearing assembly including double row rolling elements (3) between an outer member (1) and an inner member (2), a sensor unit (21) is fitted to one of the outer and inner members (1) and (2), which serves as a stationary member. The sensor unit (21) is made up of a sensor mounting member (22) and at least one or more strain sensor (23) fitted to the sensor mounting member (22). A sensor signal processing circuit (60) for processing an output signal from the strain sensor (23) is provided in the sensor mounting member (22).

Abstract: A slew bearing system includes a first bearing ring and a second bearing ring concentrically positioned relative to each other forming at least upper and lower raceways there between, a plurality of bearing rollers positioned in each raceway between the first bearing ring and the second bearing ring, a plurality of delivery nozzles capable of delivering an air and oil mixture into the raceways adjacent the upper raceway, passages capable of fluidly communicating the air and oil mixture through the raceways and collecting some oil from the mixture adjacent the lower raceway, seals capable of regulating air flow through the passages and inhibiting outflow of oil from the raceways, and at least one exit port capable of outward flow of air and oil from the raceways adjacent the lower raceway.