Abstract: An abnormality diagnostic device for a feed axis mechanism diagnoses an abnormality occurrence and an abnormal portion of the feed axis mechanism. The feed axis mechanism transmits a rotation of a motor to a ball screw coupled by a coupling to rotate the ball screw. The abnormality diagnostic device includes a resonance frequency measuring unit and a diagnosis unit. The resonance frequency measuring unit measures a resonance frequency at a plurality of stroke positions within a stroke range of the feed axis mechanism. The diagnosis unit identifies the abnormal portion based on a relationship between the stroke positions and change amounts relative to a standard value of the measured respective resonance frequencies.

Abstract: The invention provides a vibration motor having a housing assembly, an elastic connector, a pole plate, a plurality of magnets and a plurality of coils. The coils and the magnets are matched to drive the pole plate to move in at least two directions within the housing assembly. The coils are arranged on the outer side of the pole plate and fixed on the housing assembly so as to be suitable for a small-size vibration motor, then limitation of coil sizes is effectively avoided. Arrangement of the coils is facilitated, and process flows of the vibration motor during specific assembly can be optimized.

Abstract: An electromagnetic energy harvester for converting vibrations of a body to electricity that includes a coil with two ends that is wound along a longitudinal axis of a ferromagnetic core, a magnet, and a suspending device that its first end is designed to be fixed to the body and its second end is designed to be fixed to the magnet. The first end of the core is design to be at close proximity to the magnet and the longitudinal axis of the core is designed to be substantially aligned vertically to the magnetic axis of the magnet. The vibrations of the body can cause a relative alternating movement between the core and the magnet that can create alternating voltage between the ends of the coil.

Abstract: A magnetic fluid sealing device, includes first pole teeth and a first magnetic fluid adsorbed on the first pole teeth functioning as a first line of defense for sealing, as well as second pole teeth and a second magnetic fluid adsorbed on the second pole teeth functioning as a second line of defense for sealing. The second pole teeth of the magnetic fluid sealing device are arranged on the permanent magnet or the flux sleeve. Since the flux sleeve is fitted over the permanent magnet, the arrangement of the second pole teeth can ensure the ability of the pole shoe to absorb the magnetic fluid, and also can make full use of a length of the permanent magnet in the axial direction of the rotating shaft. Therefore, the magnetic fluid sealing device is effectively improved in the sealing effect and the pressure resistance without increasing its axial length.

Abstract: A bearing device for a vehicle wheel that is capable of maintaining the sealability of a protective cover by preventing a seal member of the protective cover from being damaged without performing any complex machining. The bearing device for vehicle wheel (1) is provided with: a cylindrical sensor holder (11) that is fitted outside the protective cover (9), wherein in the outer ring (2), a protective cover fitting part (13A) to which the protective cover (9) is fitted, a seal part (13B) with which the seal member (10) of the protective cover (9) is brought into contact, and a sensor holder fitting part (13C) to which the sensor holder (11) is fitted are formed, the inner diameter of the seal part (13B) is equal to that of the sensor holder fitting part (13C), and the seal part (13B) and the sensor holder fitting part (13C) are adjacent to each other.

Abstract: A bearing equipped with a sensor and incorporating a power generation function in a simple configuration is provided. A bearing includes an outer ring, a plurality of rolling elements, an inner ring, a cage, a seal member, a sensor, a transmission unit, and a power generation unit. The sensor is disposed in the seal member, and detects state information of the bearing. The transmission unit transmits the state information detected by the sensor to outside. The power generation unit is disposed so as to face a bearing space sandwiched between the outer ring and the inner ring, and generates electric power that is to be supplied to the sensor and the transmission unit. The power generation unit includes an element that converts stress into electromotive force.

Abstract: The present invention discloses a magnetic rolling bearing capable of reducing the balance radial force of the gear pump, which includes a magnetized inner ring, a rolling body, a cage, and a magnetized outer ring assembly. The inner ring is magnetized to make the inner and outer ring surfaces of the magnetized inner ring have different magnetic properties; the magnetized outer ring assembly consists of four components, namely an upper ring surface of the magnetized outer ring assembly, a lower ring surface of the magnetized outer ring assembly, and two components in left and right. The left and right components are not magnetized, they are connected by recesses and are fixed with bolts, and the four components are alternately connected to form a complete ring.

Abstract: Provided is a crank angle detection device that includes an ACG rotor supported by an end of a crank shaft and configured to rotate integrally with the crank shaft, a metal-plate-made pulsar ring including a ring-shaped plate portion and a detected portion that includes a plurality of convex portions formed at an outer circumference of the ring-shaped plate portion, and being configured to rotate integrally with the ACG rotor with the ring-shaped plate portion fixed to the ACG rotor, and a magnetic sensor arranged at an outer circumference of the pulsar ring and configured to detect the detected portion. Such a crank angle detection device is capable of detecting a crank angle with high accuracy.

Abstract: A sealed thrust bearing includes an inner ring; an outer ring facing the inner ring in an axial direction; an elastic member that covers the inner ring so as to define; an inner elastic seal member that seals a space between an inner circumferential portion of the inner ring and an inner circumferential portion of the outer ring; and an outer elastic seal member that seals a space between an outer circumferential portion of the inner ring and an outer circumferential portion of the outer ring; and a lower member that is disposed below the outer ring for being assembled with the outer ring, and is provided with cation coating. The inner elastic seal member has a lip in pressure contact with an inner surface of one of a cylinder portion and a cylindrical portion of the lower member, and the outer elastic seal member has a lip in pressure contact with an upper surface of one of an annular ring portion and an annular portion of the lower member.

Abstract: A transmission device is configured to generate at least one of a stroke motion and a reciprocating motion of an insert tool of a hand-held power tool, and includes at least one link unit configured to generate the stroke motion. The link unit includes at least one output element, at least one link element, at least one contact surface, and at least one further contact surface. The at least one contact surface is disposed at least partially on the at least one output element. The at least one link element is configured to act in combination with the at least one output element via the at least one contact surface. The at least one further contact surface is configured to generate a force that initiates the reciprocating motion, and is disposed at least partially on the at least one output element.

Abstract: An instrumented rolling bearing, comprising an outer ring and an inner ring having a rolling bearing chamber delimited therebetween. Rolling bodies are positioned in the rolling bearing chamber while being maintained by a rolling bearing cage. The rolling bearing further comprises a measuring device including at least one sensor suitable for measuring at least one operating parameter of the instrumented rolling bearing, the measuring device being at least partially integrated into the rolling bearing chamber bearing cage. The measuring device further comprises at least one cable or antenna that extends along the rolling bearing cage in the rolling bearing chamber. A method for manufacturing one such instrumented rolling bearing is also disclosed.

Abstract: A bearing assembly having an RFID (radio frequency identification) function, which can implement a communication and has a capability of accomplishing information communication on a non-contact basis. This bearing assembly includes an inlet, including an IC chip and an antenna connected with such IC chip, and a magnetic sheet, both of which are embedded in overlapped relation to each other in a bearing seal for sealing a bearing space.

Abstract: A bearing cage, including: a body fabricated of phenolic material and having an outer circumferential surface and an inner circumferential surface; and a coating of molybdenum disulfide or polytetrafluoroethylene adhered to the outer circumferential surface or the inner circumferential surface. A method of manufacturing a bearing cage, including: fabricating a body from phenolic material, the body including an outer circumferential surface and an inner circumferential surface connecting first and second sides; and adhering a coating of molybdenum disulfide or polytetrafluoroethylene to the inner or outer circumferential surface.

Abstract: A sealing device for a hub-wheel assembly that includes a rolling bearing is provided. The sealing device being has a screen assembled on an outer ring of the bearing and has an annular cylindrical wall, having an internal lateral surface press fit along an external lateral surface of a collar of the outer ring. The internal surface has a respective inner diameter (Di) and the external lateral surface has a respective outer diameter (De). A static sealing element is constrained to the screen; the ratio of the interference between inner diameter (Di) and outer diameter (De) over a screen thickness ranging between 0.22 and 0.5; a coupling length (L, L?) between the internal lateral surface and the external lateral surface is equal or greater than 5 mm; and a ratio between outer diameter (De) of the external lateral surface and coupling length (L, L?) ranging between 1 and 1.19.

Abstract: Magnetorheological transmission device and method for influencing the coupling intensity of two components, which can be coupled and whose coupling intensity can be influenced. A channel is provided, which contains a magnetorheological medium with magnetically polarizable particles, which can be influenced by a magnetic field. A magnetic field generating unit generates a magnetic field in the channel in order to influence the magnetorheological medium in the channel. A body is disposed in the channel. A free distance between the body and the component is at least ten times greater than a typical mean diameter of the magnetically polarizable particles in the magnetorheological medium. A space with magnetorheological medium is disposed between the body and a component. The magnetic field is applied to the region in order to optionally chain together the particles and/or wedge or release them with the body.

Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.

Abstract: A structure which can ensure a movement of a seal lip 22a disposed in a seal lip 17a is realized by preventing foreign matters from permeating a seal internal space 26a between a slinger 16 and a seal ring 17a which configure a combination seal ring 12a. A labyrinth seal 27a is disposed between an outer peripheral edge of a rotary side annular portion 19 configuring the slinger 16 and an inner peripheral surface of a stationary side cylindrical portion 23 of a metal insert 20 configuring the seal ring 17a. In addition, a thickened portion 29 is formed in a portion of an elastic member 21 a configuring the seal ring 17a over an entire periphery. An auxiliary seal lip 32 whose rigidity is lower than that of respective seal lips 22a to 22c is disposed in the thickened portion 29 over the entire periphery. The auxiliary seal lip 32 prevents the foreign matters from adhering to the seal lip 22a, and prevents the movement of the seal lip 22a from being hindered.

Abstract: A rolling bearing assembly includes an inner ring, an outer ring, at least one row of rolling elements disposed between raceways provided on the inner and outer rings, and an annular housing having at least one of the rings is arranged. The one ring includes two half ring parts, each half ring part having a radial portion and an inner and an outer axial cylindrical portions extending from the radial portion towards the outside. The inner axial cylindrical portion extend from the radial portion by a toroidal portion defining the raceway, each of the two half ring parts, defining with the annular housing, a closed space. A closed space or spaces can store lubricant and a passageway through at least one half ring part enables lubricant to pass from the closed space to the raceways. A magnetic and/or an electronic element is mounted inside at least one closed space.

Abstract: A rolling bearing sensor, especially a rotational speed sensor, having a housing and a signal pick-up which is arranged in the housing in a manner secured against rotation and is arranged, with the housing, in a stationary receptacle in a stationary part of a rolling bearing or in a stationary component adjoining a rolling bearing, for example, an axle journal, where the housing has an outer design via which the rolling bearing sensor in the receptacle is secured against rotation in a form-fitting manner. The sensor may have a groove which runs in the axial direction and interacts with a screw or a projection. Alternatively, a securing element which predefines a defined angular position may be pushed onto the sensor.

Abstract: A device including a sealing assembly having a first annular shield constrainable to a rotating first member, a second annular shield facing the first shield and constrainable to a stationary second member, and an annular seal supported by the first shield and provided with annular lips cooperating with the second shield. The device has a signal generator device having a third shield constrainable to the first member and an annular signal generator element arranged facing the first and the second shields; wherein the first shield has a flange portion, having on a side of the first shield, a first and a second L-fold in opposite directions which delimit a first annular surface facing the annular lips and the second shield; wherein the annular signal generator element is delimited towards the second shield by a second annular surface facing the annular lips forming an obtuse angle with the first annular surface.

Abstract: A bearing with a magnetic fluid seal, wherein a plurality of rolling elements are interposed between an inner ring and an outer ring, and a ring-shaped magnet is arranged at an opening side of the inner and outer rings so as to retain magnetic fluid for sealing the plurality of rolling elements, and wherein the ring-shaped magnet is magnetized such that magnetic poles are oriented in an axial direction, the bearing comprising: a ring-shaped pole plate arranged so as to be in contact with an outer side surface of the ring-shaped magnet in the axial direction; outer-ring-side magnetic fluid retained between the outer ring and the ring-shaped pole plate and/or between the outer ring and the ring-shaped magnet; and inner-ring-side magnetic fluid retained between the inner ring and the ring-shaped pole plate and/or between the inner ring and the ring-shaped magnet.

Abstract: A bearing assembly for rotatively holding a shaft with respect to a support member and comprises: a bearing, with a rotatable ring and a fixed outer ring to be immobilized within a housing of said support member. An encoder washer is fast in rotation with the rotating ring. At least one sensor is adapted to detect at least one rotation parameter of the encoder washer and a sensor body holds this sensor. An annular flange is used for mounting said sensor body with respect to the fixed outer ring. The annular flange has a first skirt and a second skirt which define, between them and a bottom wall of the flange, an annular recess for accommodating at least a part of the sensor body. In mounted configuration of the bearing assembly, the first and second skirts extend respectively towards the rotatable and fixed rings.

Abstract: This instrumented bearing comprises a bearing and a sensor unit for sensing the angular position of the rotatable ring with respect to the fixed ring of the bearing, an encoder element which is fastened to the rotatable ring, and a sensing element fastened to the fixed ring, adapted to sense a parameter representative of the rotation speed of the rotatable ring. The sensing element is mounted in a casing fastened with the fixed ring. The casing provides a peripheral wall mounted on the fixed ring and which includes at least one snap portion adapted to be received in a recess of a surface of the fixed ring, and at least one axial blocking portion adapted to abut against a lateral surface of the fixed ring, perpendicular to the rotation axis of the instrumented bearing. Each snap portion and each blocking portion alternate around a central axis (X6).

Abstract: A bearing assembly having an RFID (radio frequency identification) function, which can be compactized and contributes to reduction in labor and cost and which can also implements a favorable communication and has a capability of accomplishing information communication on a non-contact basis. This bearing assembly includes an inlet (14), including an IC chip (16) and an antenna (17) connected with such IC chip (16), and a magnetic sheet (15), both of which are embedded in overlapped relation to each other in a bearing seal (5) for sealing a bearing space.

Abstract: An improved rotary disc atomizer for use in, for example, spray dryers or congealers is disclosed. The rotary disc may be directly mounted to the shaft of a high-speed electrical motor. The high-speed electrical motor comprises a permanent magnet rotor and electro-magnetic bearings. The electro-magnetic bearings may be supported by one or more upper/lower bearing housings and used to enable frictionless support of the shaft/rotor and rotary disc. The atomizer system may further comprise a gas distributor enabled to dynamically adjust the velocity at which the gas leaves the radial vanes and meets with the atomized droplets.

Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.

Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.

Abstract: A bearing, which has a first bearing ring, a second bearing ring, a rolling element interposed between the two bearing rings and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit which has a high filling factor for the induction coil. The first claw of the claw ring is connected to a magnetically conducting section of the body of the first bearing ring in a magnetically conducting fashion. The magnetic poles of the pole pairs are mounted so as to be connected to a magnetically conducting section of the body of the second bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the two magnetic sections and the rolling element.

Abstract: A bearing, which has a first bearing ring, a second bearing ring and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit, which has a high filling factor for the induction coil. Every claw ring is connected to a section of the body of the first bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the section of the body of the first bearing ring.

Abstract: Construction is achieved that is able to prevent strain deformation in the axial direction of a flat plate section 21 of a cover 19a when a cylinder section 20 of the cover 19a, which covers the opening on the inside end in the axial direction of an internal space where an encoder 1 is located, is fitted into and fastened to the inside end section in the axial direction of an outer ring 7. A non-contact section 26a is formed all the way around the inside end section in the axial direction of the cylinder section 20 such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension L26 in the axial direction is two times or more the thickness dimension t19 of a plate member of the cover 19a.

Abstract: A bearing unit having an axis of rotation and provided with a stationary ring and a rotatable ring arranged coaxially with respect to one another, a magnetic encoder fixed onto the inner ring and extending in front of an annular surface of the stationary ring; and a protective cover mounted on the external ring to protect the encoder and close off a space defined between the two rings; an annular channel being formed in the stationary ring and sealing means being arranged between the side wall and the axial lug within the annular channel so as to seal the cover and prevent the infiltration of impurities between the cover and the axial lug.

Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.

Abstract: Mechanisms and methods for clamping force generation are described. In one embodiment, a clamping force generator system includes a permanent magnet bearing coupled to a traction ring and to a torque coupling. The traction ring can be provided with an electromagnetic bearing rotor and the torque coupling can be provided with an electromagnetic bearing stator. In some embodiments, a mechanical load cam, a permanent magnet bearing, and an electromagnetic bearing cooperate to generate a clamping force between the traction rings, the power rollers, and the idler. In other embodiments, a series of permanent magnet bearings and a mechanical bearing are configured to produce a clamping force. In one embodiment an electromagnetic bearing is coupled to a control system and produces an optimal clamping force that is associated with a torque transmitted in the transmission during operation.

Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, characterized in that a magnet for holding in a lubrication portion of the rolling bearing a lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race, and a cross-sectional profile of the yoke has an I-shape.

Abstract: A combination of a drive shaft transmitting a torque and a bearing assembly mounting the drive shaft, characterized in that the bearing assembly (3) includes at least one integrated sensor device (4) for detecting a torsion-induced change of a magnetic field of a magnetized section (5) that is provided on the drive shaft (2) in the region of the bearing assembly (3) or is connected to the drive shaft (2) in a torque-resistant manner, the change of the field being a measure of the transmitted torque.

Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic steel sheet with a cup-shaped configuration. The protective cover has a cylindrical fitting portion, a disk-shaped shield portion, a radially reducing portion, a stepped portion and a bottom portion. The cylindrical fitting portion is press-fit into the inner circumference of the inner-side end of the outer member. The disk-shaped shielding portion extends radially inward from the fitting portion, via the radially reducing portion. The inner-side surface of the shielding portion is arranged close to or in contact with a rotation speed detecting sensor. The bottom portion is continuous with the shielding portion, via the stepped portion to close the inner-side end of the inner member. A full deflection of the side surface of the shielding portion that is caused by a load the same as that applied to the protecting cover when it is press-fit into the outer member is limited to a predetermined value or less.

Abstract: A tapered roller bearing (1) with two coaxial bearing rings (2, 3) and a multiplicity of tapered rollers (4) which are arranged between the bearing rings (2, 3), are guided in a cage (10, 11, 12) and roll on raceways (7, 8) on the bearing rings (2, 3), with a rim (9) at the large diameter of the inner bearing ring (3), wherein the cage (10, 11, 12) is formed of side rings (10, 11) and webs (12) which connect them, with the formation of pockets (13) for the tapered rollers (4), and elastic projections (14) are arranged on one side ring (10), which projections (14) interact with the rim (9) and prestress the cage (10, 11, 12) with the tapered rollers (4) axially against the rim (9).

Abstract: A rolling bearing used in a power transmission device for transmitting power such as turning force, includes a magnet for holding in a lubrication portion of the rolling bearing. A lubricating magnetic fluid for lubricating the lubrication portion is provided on at least one side of an outer race of the rolling bearing, and an annular yoke made of a magnetic material loosely fitted to a rotating shaft is provided on the opposite side of said magnet relative to said outer race.

Abstract: Construction is achieved that is able to prevent strain deformation in the axial direction of a flat plate section 21 of a cover 19a when a cylinder section 20 of the cover 19a, which covers the opening on the inside end in the axial direction of an internal space where an encoder 1 is located, is fitted into and fastened to the inside end section in the axial direction of an outer ring 7. A non-contact section 26a is formed all the way around the inside end section in the axial direction of the cylinder section 20 such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension L26 in the axial direction is two times or more the thickness dimension t19 of a plate member of the cover 19a.

Abstract: A wheel bearing apparatus has a protecting cover formed from non-magnetic material with a substantially dish-shaped configuration. A cylindrical fitting portion is adapted to be press-fit onto the inner circumference of the inner-side end of the outer member. A disc-shaped shielding portion extends radially inward from the fitting portion, via a radially tapered portion. A bottom portion extends from the shielding portion, via a stepped portion. A flat relief portion is formed between the radially tapered portion and the shielding portion. The relief portion is parallel with the shielding portion. The relief portion is set slightly back from the shielding portion toward the radially tapered portion. An elastic member is integrally adhered to the outer circumference of the radially tapered portion. The elastic member elastically contacts with the inner circumference of the inner-side end of the outer member.

Abstract: Bearing unit having an axis of rotation (A) and provided with a stationary ring and a rotatable ring, these rings being coaxial with each other and axially delimited on one side (L) by respective axial surfaces which are transverse to the axis (A); a magnetic encoder fixed to an outer cylindrical surface of the inner ring; and a protective cover mounted on the outer ring to protect the encoder and to close off a space formed between the two rings, the axial surface of the outer ring and the protective cover jointly delimiting a compartment for housing said encoder, which is positioned substantially outside the space and extends radially from the outer cylindrical surface to a boundary in the proximity of an outer cylindrical surface of the outer ring.

Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.

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

Abstract: Provided with a sealed rotational output unit (3) which includes a tubular shaft (12) having an outer circumferential surface sealed with a ferrofluidic seal (13); a rotating output shaft (14) disposed inside the tubular shaft (12); and an O-ring (17, 18) that seals between the tubular shaft (12) and the rotating output shaft (14). When the rotating output shaft (14) is directly coupled to a hollow motor shaft (9), shaking thereof is absorbed by the O-ring (17, 18), causing no excessive stress to be produced on the bearing side of the hollow motor shaft (9) or on a bearing (15, 16) side of the ferrofluidic seal (13). Since the tubular shaft (12) rotates in conjunction with the rotating output shaft (14), the O-ring (17, 18) that seals therebetween does not degrade in sealing capability due to wear by sliding. The sealed rotational output unit can be used with high rotational accuracy by directly coupling to a hollow motor (2) without any joint.

Abstract: 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.

Abstract: Mechanisms and methods for clamping force generation are disclosed. In one embodiment, a clamping force generator system includes a permanent magnet bearing coupled to a traction ring and to a torque coupling. The traction ring can be provided with an electromagnetic bearing rotor and the torque coupling can be provided with an electromagnetic bearing stator. In some embodiments, a mechanical load cam, a permanent magnet bearing, and an electromagnetic bearing cooperate to generate a clamping force between the traction rings, the power rollers, and the idler. In other embodiments, a series of permanent magnet bearings and a mechanical bearing configured to produce a clamping force. In one embodiment an electromagnetic bearing is coupled to a control system and produces a specified clamping force that is associated with a torque transmitted in the transmission during operation.

Abstract: The magnetic encoder (17) includes a slinger (18) fixed to a rotation-side raceway ring of a bearing and including an outer side surface (22) opposed to the side of a sensor to detect rotation speed of the rotation-side raceway ring and having a surface roughness Ra: 0.3 to 3.0 ?m, and an inner side surface (23) opposed to the side of a sealing member (16) to seal the bearing; a multipolar magnet (19) bonded to the outer side surface (22) through an adhesive; and a film (25b) formed on the inner side surface (23), having a surface roughness Ra of 0.3 ?m or less, and being in sliding contact with the sealing member (16).

Abstract: In a wheel support structure for a motorcycle, a magnetic encoder 34 for detecting rotational speed is mounted and fastened to the inner circumferential surface of a cylindrical section 36a, which extends outward in the axial direction from the outer ring 22, of an encoder installation plate 35a that is attached to the end section in the axial direction of the outer ring 22 of the one of the rolling bearings 21a on the side toward the other rolling bearing 4, or is mounted and attached to the side surface toward the side of the other rolling bearing 4 of a slinger 73, which is attached to the end section in the axial direction of the outer ring 22b of the one of the rolling bearings 21a on the side toward the other rolling bearing 4 such that the end surface on the inner diameter side closely faces the outer surface of the inner ring 24 to form labyrinth space 42.

Abstract: A cooling fan includes a fan housing (30) having a central tube (34) extending upwardly therefrom, a bearing (60) being received in the central tube, a stator (20) being mounted around the central tube, and a rotor (10) having a shaft (18) extending through the bearing. At least one notch (180, 184) is defined in an end of the shaft. A balance structure (62) is mounted around the shaft, and has a portion facing and surrounding an upper portion of the at least one notch of the shaft. The balance structure is made of magnetic material, which can attract the shaft downward to thereby counter the upward force generated by the rotor when it is driven to rotate. Accordingly, the noise problem incurred by the floating of the rotating rotor can be resolved by the present invention.

Abstract: A wheel bearing apparatus incorporating a rotational speed detecting apparatus has a protecting cover. A cylindrical fitting portion of the cover is press-fit into the end inner circumference of the outer member. A donut-shaped shielding portion extends radially inward from the fitting portion, via a radially reducing portion. A bottom portion is continuous with the shielding portion, via a stepped portion, to close the inner-side end of the inner member. A sealing member is integrally adhered to the outer circumference of the radially reducing portion. The sealing member and annular portion has a diameter slightly smaller than the outer diameter of the fitting portion of the protecting cover. The sealing member projected portion has a diameter slightly larger than the outer diameter of the fitting portion of the protecting cover. The projected portion is press-fit into the end inner circumference of the outer member via a predetermined interference.