Abstract: A ball bearing is provided which includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially convex circular arc shape in cross sections along a circumferential direction are formed on one of the cage-side sliding contact surface and the seal-side sliding contact surface at constant pitches in the circumferential direction.

Abstract: Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.

Abstract: A rotor unit 1 used in an electric motor, the rotor unit 1 including a rotor core 5, a rotary shaft 3 inserted in an inner periphery of the rotor core 5, a plurality of magnets 6 attached to an outer peripheral surface of the rotor core 5, and a cover member 4 covering an outer periphery of each of the plurality of the magnets 6, in which the rotary shaft 3 is provided, on an outer peripheral surface of the rotary shaft 3, with a caulking part 3c configured to restrict an axial movement of the rotor core 5 with respect to the rotary shaft 3, and the caulking part 3c is configured to restrict an axial movement of the cover member 4 with respect to the rotor core 5.

Abstract: Provided is a sintered bearing formed mainly of an iron structure (33) and a copper structure (31) which are formed of a partially diffusion-alloyed powder (11) of an iron powder (12) and a copper powder (13). The sintered bearing includes a copper structure (31d) formed of a granular elemental copper powder (13?) having a grain diameter of 45 ?m or less, the ratio of the copper structure (31d) being 10 mass % or less. With this, a further increase in strength of the sintered bearing can be realized.

Abstract: A power transmission mechanism (2) includes left and right drive shafts (3L, 3R) that transmit rotational torque from a drive source to drive wheels provided on left and right sides of a vehicle. In the right drive shaft (3R) and the left drive shaft (3L), the numbers of rolling elements (23, 33) included in plunging type constant velocity universal joints (6L, 6R) are different from each other.

Abstract: A bearing includes a plurality of claws located in a circumferential direction at an end face of an inner ring and protruding from the end face of an inner ring in an axial direction. A lock mechanism can be used to fasten the claws to a shaft. At least one of the plurality of claws has an opening provided therein.

Abstract: A sealed rolling bearing includes slingers and seal members disposed between an inner ring and an outer ring, and sealing a rolling element installation area. The radially inner and outer portions of each slinger are bent axially inwardly such that a labyrinth portion is defined between the radially outer bent portion of the slinger and the radially inner surface of the outer ring, the labyrinth portion having a path length, in the axial direction of the bearing, longer than the material thickness of the slinger.

Abstract: Provided is a tapered roller bearing of an inner ring guidance design. A smaller diameter annular part of a cage and a smaller rib of an inner ring of the bearing defines a smaller diameter-side clearance S1. A larger diameter annular part of the cage and a larger rib of the inner ring defines a larger diameter-side clearance S2. The bearing defines a dimensionless number Y which is in the range of at least 0.39 to no more than 0.

Abstract: A bearing device for a vehicle wheel includes: an outer member having a plurality of rows of outer raceway surfaces; an inner member including a hub ring and an inner ring and having a plurality of rows of inner raceway surfaces; a plurality of rows of rolling members interposed between raceway surfaces of the outer member and the inner member; and an outer-side seal member that blocks an outer-side opening end of an annular space formed by the outer member and the inner member, wherein an annular recess around a rotation axis of the hub ring is provided in an inner-side base end portion of a vehicle wheel mounting flange in the hub ring, and an outer-side end portion of the outer member is inserted into the recess, and at least a part of the outer-side seal member is accommodated in the recess.

Abstract: A fixed type constant velocity universal joint has outer joint member track grooves each with a raceway center line that includes an arc-shaped portion having a curvature center that has no offset with respect to a joint center in an axial direction. The track grooves are formed such that adjacent track grooves are inclined in opposite directions. The joint also has inner joint member track grooves that are each mirror-symmetric with a corresponding one of the outer joint member track grooves. When at a maximum operating angle, a torque transmission ball that moves toward an opening side of the outer joint member track groove loses contact with an opening-side end portion of that track groove, and when at an operating angle of 0°, an end portion of a cage projects from the opening-side end portion of the outer joint member in the axial direction.

Abstract: Provided is a steering system capable of enhancing traveling stability when a vehicle drives straight and improving small-turn performance. The steering system includes: a first steering device; a second steering device including a mechanical section configured to individually steer each of left and right wheels by driving a steering actuator and a control section configured to control the steering actuator; and a vehicle information detection section configured to detect a velocity of the vehicle and a steering angle. The control section includes a turning angle control module configured to control the steering actuator pursuant to a predetermined rule in accordance with the velocity of the vehicle and the steering angle so as to control turning angles of the left and right wheels.

Abstract: A clutch unit includes an operation lever, an operation member, an input-side clutch, an output-side clutch, and a bottomed cylindrical housing. The input-side clutch includes an input-side inner ring member and an operation bracket. The operation bracket includes an engagement portion that engages with the input-side inner ring member, a facing portion that faces the bottom surface of the housing with a gap therebetween, a fastened portion that penetrates a through hole formed in the bottom surface of the housing and is fastened to the operation member, and a sliding-contact portion that extends from the facing portion toward the bottom surface of the housing and comes into sliding-contact with the bottom surface of the housing.

Abstract: Provided is a bearing device for a vehicle wheel that is suitable in being able to prevent impairment in assemblability of the bearing device for a vehicle wheel to a knuckle without cost increase. A bearing device for a vehicle wheel (1) is provided with an inner member and an outer ring (2) which is an outer member having a vehicle-body-mounting flange part (2d), wherein the outer ring (2) has a pilot part (2e) disposed inward of the vehicle-body-mounting flange part (2d), and the pilot part (2e) has a fitting portion (2f) configured to be fitted to a knuckle (10) and a guiding portion (2g) having a diameter which gradually decreases inward from the inner-side end of the fitting portion (2f).

Abstract: To provide an axle bearing having a low torque property and superior bearing lifetime. A hub bearing 6 is configured to rotatably support a wheel of a vehicle, and has a grease composition 10 sealed in an inner space thereof. The grease composition 10 contains a base oil and a thickener. The shear stress of the grease composition at the shear rate of 1,000-10,000 s?1 at 25° C. is 3,000 Pa or less. The viscosity of the grease composition is 1 Pas or less. The yield stress of the grease composition at 25° C. measured by a dynamic viscoelasticity analysis method using a rheometer is 1,300-3,000 Pa.

Abstract: Provided is a clutch unit in which an output-side outer ring member is attached to a base plate without welding. A clutch unit (100) includes an output-side clutch (60) and a housing (11) that accommodates the output-side clutch (60). The output-side clutch (60) includes an output-side outer ring member (62). The output-side outer ring member (62) and the housing (11) have an engagement protrusion (62s) and an engagement groove (11s) that engage with each other to restrict relative rotation therebetween.

Abstract: The electric-powered actuator includes a control device including: a motor angle estimation unit, and a reverse-input holding control section having a function of engaging an engaging part with an engaged part by controlling a solenoid to set the reverse-input holding mechanism into a reverse-input holding state while the electric-powered actuator is applying a load and a function of, from the reverse-input holding state, disengaging the engaging part from the engaged part to set the reverse-input holding mechanism into a reverse-input holding release state. The reverse-input holding control section includes an engagement intermediate control function section configured to control the estimated rotation angle such that the engaged part and the engaging part come into a predetermined positional relation within a certain period of time, when the engaging part is brought into engagement with the engaged part and when the engaging part is brought out of engagement with the engaged part.

Abstract: A condition monitoring system comprises a measurement device and a processing server. The measurement device measures a condition of an apparatus provided for a wind power generation facility. The processing server associates measurement data measured by the measurement device with load data representing an operating load of the wind power generation facility acting at a time when the measurement data is measured and cumulative load data representing a cumulative operating load accumulated up to the time when the measurement data is measured, to generate a data set of the load data, the cumulative load data, and the measurement data for the time when the measurement data is measured.

Abstract: A bearing device includes: a magnetic ring fixed to an inner ring; and a stator fixed to an outer ring so as to face magnetic ring. Magnetic ring and stator constitute a claw pole type generator. Stator includes a coil and a magnetic yoke surrounding coil. The magnetic yoke is configured by combining a first member and a second member that are magnetic bodies. First member and second member have an identical shape. Each of first member and second member has a plurality of second claws arranged in a comb shape. A plurality of first claws of first member and the plurality of second claws of second member are alternately arranged on a surface facing magnetic ring.

Abstract: A sintered metal connecting rod (10) includes as an integrated body, a large end portion (11), a small end portion (12), and a stem portion (13). In the sintered metal connecting rod (10), division marks (14a, 14b) of a molding die by a compression molding are formed between the large end portion (11) and the stem portion (13) and between the small end portion (12) and the stem portion (13) on one of front and back surface (11c to 13c) in which the through-holes (11a, 12a) are formed, respectively. The large end portion (11) and the stem portion (13) have a density difference of 4% or less, and the small end portion (12) and the stem portion (13) have a density difference of 4% or less.

Abstract: A bearing device for a wheel, which has improved axial assembly accuracy of a sealing member by reducing the amount of springback. The bearing device for a wheel comprises an inner sealing member that blocks an inner opening end of an annular space formed by an outer ring and an inner ring. A sealing ring of the inner sealing member has a core metal fitting in the outer ring and an elastic member joined to the core metal. The elastic member has: a pressing part that is pressed inward in the axial direction when the sealing ring is press-fitted into the outer ring; and a non-pressing part that is not pressed inward in the axial direction when the sealing ring is press-fitted into the outer ring, wherein the axial thickness of the pressing part is thinner than the axial thickness of the non-pressing part.