Abstract: An end determination unit determines that a steering apparatus is in an end touching state when an angle deviation, which is a difference between an actual turning angle and a target turning angle, exceeds a threshold. This angle deviation exceeds the threshold before a large axial force is generated in a steering shaft. Accordingly, is it possible to determine that the steering apparatus is in the end touching state more quickly.

Abstract: A rolling bearing apparatus includes a bearing main body having an outer ring that is a fixed ring and an inner ring that is a rotating ring, the outer ring and the inner ring being concentrically provided, and a plurality of rolling elements provided between the outer ring and the inner ring, and a control unit having a vibration detector attached to the outer ring and a calculation unit that calculates a value for vibration of the bearing main body and a rotation speed thereof based on a detection signal from the vibration detector. The calculation unit calculates the rotation speed based on frequency components of vibration obtained from the detection signal and the number of vibrations inherent in the bearing main body.

Abstract: An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.

Abstract: A fastening mechanism fastens a first side plate to a second side plate by a fastening member. A boss with a rhombic cross-section of the fastening member is inserted into a telescopic-adjust long groove of the second side plate. An outer periphery of the boss includes a first corner part and a third corner part each forming an obtuse angle and facing each other. The first corner part is disposed on an upper side in an axial direction, on a lower side in a tilt direction, while the third corner part is disposed on a lower side in the axial direction, on an upper side in the tilt direction. A width across the first corner part and the third corner part is shorter than a groove width W of the telescopic-adjust long groove.

Abstract: A ball bearing includes an inner ring with an inner raceway groove formed on an outer periphery of the inner ring, an outer ring with an outer raceway groove formed on an inner periphery of the outer ring, a plurality of balls interposed between the inner raceway groove and the outer raceway groove, and an annular cage that holds the balls at predetermined intervals along a circumferential direction. The cage has an annular portion positioned on an axially first side of the balls and a plurality of cage bars extending from the annular portion toward an axially second side. Each of the cage bars has a guide portion that positions the cage by contacting an area of the inner raceway groove that is different from an area contacted by the balls and pocket surfaces each come into point contact with a corresponding one of the balls.

Abstract: A tapered roller bearing includes an inner ring having an inner-ring raceway surface, an outer ring arranged radially outward of the inner ring so as to be concentric with the inner ring having an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of tapered rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface; and a cage that holds the tapered rollers at predetermined intervals along a circumferential direction. A diameter of an inner peripheral surface of a small-diameter-side end of the cage is substantially the same as a diameter of a small-diameter-side pitch circle of the tapered rollers.

Abstract: A ball bearing includes an inner ring including an inner ring raceway surface on an outer periphery, an outer ring including an outer ring raceway surface on an inner periphery, a plurality of balls arranged between the inner ring raceway surface and the outer ring raceway surface, and a retainer including a plurality of pocket holes which respectively store the plurality of the balls, and arranged between the inner ring and the outer ring. Grease is sealed between the inner ring and the outer ring. The inner periphery of the outer ring is contacted with outer peripheral surface of the retainer so as to guide the retainer. The inner periphery of the outer ring includes a grease storage groove which communicates with the outer ring raceway surface, only on one side in an axial direction of the outer ring with respect to the outer ring raceway surface.

Abstract: The steering apparatus includes a first seal member and a second seal member. The first seal member is fixed to one of an outer peripheral surface of a rack shaft and an inner peripheral surface of a housing. The first seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the other of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing. The second seal member is fixed to the other of the outer peripheral surface and the inner peripheral surface. The second seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the one of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing.

Abstract: A roller bearing includes an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring, an outer ring arranged concentric with and peripherally outside the inner ring, and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner, and a cage that holds the rollers at predetermined intervals along a circumferential direction. Opposite end portions of the outer-ring raceway surface in an axial direction serve as guide surfaces or which rotation of the cage is guided. Or an outer periphery of the cage, slidable contact surfaces are formed which slidably contact the guide surfaces and which are arranged to thee the respective guide surfaces across a labyrinth clearance.

Abstract: A bearing ring formed of quenched and tempered high carbon chromium bearing steel, including an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less, and a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner layer portion.

Abstract: A telescopic shaft includes: an inner shaft where a pair of recessed grooves that face each other in a direction perpendicular to an axis and extend in an axial direction are formed; an outer shaft where a pair of recessed grooves that face each other in the direction perpendicular to the axis and extend in the axial direction are formed; a plurality of rolling bodies that are disposed between each of the recessed grooves and the corresponding recessed groove so as to form a line in the axial direction; a pair of stoppers; and a buffer body unit. Each of the stoppers restricts falling of a rolling body at an end portion of the corresponding line from the corresponding recessed groove of the inner shaft. The buffer body unit integrally includes a pair of buffer bodies, and a connection portion that connects the pair of buffer bodies.

Abstract: A rolling bearing device includes: a bearing part having an inner ring, an outer ring, and balls; and an oil supply unit provided adjacent to an annular space between the inner ring and the outer ring and capable of supplying lubricating oil to the annular space. The bearing part has an annular cage provided in the annular space. The cage has a pair of annular parts and a plurality of bars. An outer circumferential surface of the annular part located on a first axial side has a contact portion capable of coming in contact with a part of an inner circumferential surface of the outer ring. A radially outer surface of the cage has, with the contact portion being a top, a first inclined surface provided from the top toward the first axial side and a second inclined surface provided from the top toward a second axial side.

Abstract: A bearing apparatus for wheels includes an outer ring, a hub shaft having a flange portion for Wheel attachment on a vehicle outer side, rolling elements provided between the outer ring and the hub shaft, a seal attached to the vehicle-outer-side part of the outer ring, and a slinger that is attached to the vehicle-outer-side part of the hub shaft and contacted by the seal An outer peripheral surface of the outer ring has a non-plated surface portion provided at a vehicle-outer-side end and a plated surface portion continuous with the non-plated surface portion. The slinger has a slinger main body portion that is contacted by the seal and a cylindrical facing portion that faces the non-plated surface portion to form a labyrinth clearance.

Abstract: In a motor control device, a velocity feed-forward control portion includes a velocity-side acceleration input portion that outputs received high-order command acceleration as a velocity-side acceleration output; a velocity-side velocity input portion that outputs a received high-order command velocity as a velocity-side velocity output; velocity-side boundary-velocity input portions which are prepared so as to respectively correspond to boundary velocities, and to output velocity-side boundary velocity outputs from the velocity-side boundary-velocity input portions corresponding to the high-order command velocity, the boundary velocities being velocities at boundaries of preset adjacent velocity ranges obtained by dividing a limited velocity range; a velocity-side first weight learning portion that changes velocity-side first learning weights in accordance with a velocity deviation, the velocity-side first learning weights respectively corresponding to velocity-side first outputs; and a velocity-side output

Abstract: A bearing apparatus for wheels includes an outer ring, a hub shaft, rolling elements, a seal attached to a vehicle-outer-side part of the outer ring, a rotating slinger attached to the vehicle-outer-side part of the hub shaft and contacted by the seal, and a fixed slinger attached to a vehicle-outer-side outer periphery of the outer ring and contacted by the seal. An outer peripheral surface of the outer ring has a non-plated surface portion provided at a vehicle-outer-side end of the outer ring and a plated surface portion that is continuous with the non-plated surface portion. The fixed slinger has an inner cylindrical portion externally fitted over and attached to the non-plated surface portion. The seal has an inner lip that contacts the rotating slinger and an outer lip that contacts the inner cylindrical portion.

Abstract: A differential gear includes: a first output gear; a second output gear; a differential case; a clutch member configured to move in a direction of a rotation axis between a connecting position where the differential case is connected to the first output gear in a relatively non-rotatable manner and a non-connecting position where the differential case and the first side gear are allowed to rotate relative to each other; an electromagnetic coil having a cylindrical shape and configured to move the clutch member in the direction of the rotation axis; and a yoke having an annular shape and serving as a magnetic path of a magnetic flux of the electromagnetic coil. The clutch member has an outermost diameter smaller than an inside diameter of the yoke.

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; and a pressing mechanism. The clutch member includes a meshing portion meshing with the second rotational member, an engageable portion circumferentially engaging with an engaged portion provided in the first rotational member, and a cam surface configured to generate a cam thrust in a direction of a rotation axis by a relative rotation with respect to the first rotational member. When the clutch member moves, a depth of meshing with the second rotational member is deepened by the cam thrust, and then the engageable portion engages with the engaged portion, so that the clutch member receives a torque from the first rotational member.

Abstract: An optical nondestructive testing method includes: a laser emitting step involving emitting a heating laser from a laser output device such that the intensity of the heating laser applied to a measurement point changes sinusoidally; a laser intensity measuring step involving measuring the intensity of the heating laser by a phase difference detector; an infrared radiation intensity measuring step involving measuring, by the phase difference detector, the intensity of infrared radiation radiating from the measurement point; a phase difference measuring step involving determining, by the phase difference detector, a phase difference between the intensity of the heating laser and the intensity of the infrared radiation, and outputting the phase difference determined to a determiner from the phase difference detector; and a connection area calculating step involving determining, by the determiner, a connection area in accordance with the phase difference and phase difference-connection area correlation informatio

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; an electromagnetic coil; and a position detecting portion. A control method for the dog clutch, includes: supplying an exciting current to the electromagnetic coil when the clutch member is moved from the non-connecting position toward the connecting position; and promptly reducing the exciting current when the position detecting portion detects that the clutch member has moved to the connecting position.

Abstract: A four-wheel-drive vehicle includes a first driving force transmission system and a second driving force transmission system. A control device controls the second driving force transmission system. The control device includes a road surface state determination section that determines whether a coefficient of friction of a road surface is equal to or higher than a predetermined value based on an index value regarding the coefficient of friction of the road surface, controls a dog clutch such that the dog clutch is engaged irrespective of the index value regarding the coefficient of friction of the road surface when an ignition switch is brought into the on-state, and controls the dog clutch such that the dog clutch is brought into the disengaged state when it is determined that the coefficient of friction of the road surface is equal to or higher than the predetermined value.