Abstract: A heat treatment apparatus that thermally treats an annular workpiece formed of a steel material by inductively heating the workpiece includes a treatment tank in which the workpiece is set and thermally treated, a holding portion that holds the workpiece at a predetermined position, an induction heating coil that surrounds the workpiece to inductively heat the workpiece, and a cooling medium that cools surfaces of the workpiece during the induction heating of the workpiece.

Abstract: A power steering device for an axle assembly provided with a limited-slip differential designed to transmit a drive torque to a first and second wheel and to automatically activate, in the event of a loss of synchronism and/or of grip of one of the first and second wheels, an operating mode referred to as “lockup mode” in which differential transfers most of the driving torque to the slower of the first and second wheels, the power steering also including a steering mechanism and a power steering motor controlled by a control module, steering control module containing compensation laws which allow the power steering motor to compensate for certain effects, such as alternating load backup or freezing, induced in the steering mechanism by activation of the differential lockup mode, so as to give the driver a feel close to that of an axle assembly that does not have a lockup mode.

Abstract: An axial section of a continuous portion where an outer peripheral surface of a spindle portion of a main spindle in which a punch is installed is continuous with an outer peripheral surface of a punch holder is formed of a first circular arc joined to the outer peripheral surface of the spindle portion and a second circular arc joined to the outer peripheral surface of the punch holder. The first circular arc and the second circular arc are in contact with each other. The second circular arc is smaller than the first circular arc in curvature radius.

Abstract: In a manufacturing method, an annular preform made of reinforcing fibers is set in a region of a mold which corresponds to a sleeve. In this state, this region of the mold and a region of the mold which corresponds to a tooth portion are filled with a resin. A gear is manufactured by this process.

Abstract: A bearing device includes: a first outer ring member and a second outer ring member which include a raceway surface in each inner circumferential surface and are disposed to abut on each other in an axial direction; a connection ring which fixes the first outer ring member and the second outer ring member to each other; an inner ring in which two rows of raceway surfaces are formed in an outer circumferential surface; and a plurality of rolling elements which are disposed in a space formed between the raceway surface of the first outer ring member and one of the two rows of the raceway surfaces of the inner ring, and in a space formed between the raceway surface of the second outer ring member and the other one of the two rows of the raceway surfaces of the inner ring.

Abstract: Provided is a grease composition containing a base oil, a thickener, and an additive. The base oil contains a poly-?-olefin and has a kinematic viscosity of 20-60 mm2/s at 40° C. The thickener contains a urea compound produced by reacting a diisocyanate compound with a mixed amine containing an alicyclic amine and an aromatic amine. The additive contains a phosphorous acid ester, an ether compound, and an oxidized paraffin.

Abstract: A steering system includes a rack shaft, a tubular rack housing, and a tubular rack bushing. The rack bushing is interposed between the outer surface of the rack shaft and the inner surface of the rack housing. The rack bushing supports the rack shaft such that the rack shaft is slidable in the axial direction. The rack housing includes an annular groove on its inner surface. The rack bushing includes a collar. a through slit. and first non-through slits. The collar protrudes radially outward from substantially the entire circumference of the rack bushing. The collar is fitted into the annular groove. The through slit passes through the rack bushing in the axial direction. Each first non-through slit extends in the axial direction such that the first non-through slit passes through a portion of the rack bushing whose axial position corresponds to the axial position of the collar.

Abstract: A steering control apparatus is provided which suppresses possible vibration of a steering system resulting from differential steering processing when a steering angle or a steered angle has a large value. A differential steering processing circuit calculates a differential steering correction amount based on a difference value of a target steering angle, and increases or reduces the target steering angle using the calculated amount to obtain a target steered angle. A limiting reaction force setting processing circuit increases a limiting reaction force when a maximum value of the target steering angle and the target steered angle is equal to or larger than a common threshold. When the maximum value approaches the common threshold, an angle-sensitive gain setting processing circuit reduces an angle-sensitive gain so as to correct and reduce the differential steering correction amount.

Abstract: A truer includes: a core formed into a truncated cone; and an abrasive grain layer fixed onto an outer peripheral surface of the core. The core includes: a base that is a small-diameter portion of the truncated cone and has a disc shape; and a tubular member extending from an outer peripheral edge of the base in the direction in which a rotation axis of the truncated cone extends. The tubular member has a hollow tubular shape. The tubular member includes an outer peripheral surface tapered so that a portion of the tubular member opposite to the base and adjacent to an extremity of the tubular member is a large-diameter portion of the truncated cone. A recess opening toward the extremity is defined inward of the tubular member.

Abstract: A steering system includes a two-way clutch, a worm wheel that is rotatable together with an input shaft, and a coil that generates a drive force for the two-way clutch to couple/decouple the input shaft and an output shaft to/from each other. The worm wheel has a center circular plate portion fixed to the input shaft, a radial ring portion that projects forward from a peripheral edge of the center circular plate portion, and a toothed portion that projects outward in the radial direction from the radial ring portion. The two-way clutch is disposed in a space surrounded by the center circular plate portion and the radial ring portion and formed on the front side with respect to the center circular plate portion. The coil surrounds an outer peripheral surface of the radial ring portion.

Abstract: In a self-aligning roller bearing, in a longitudinal section including a center line of a spherical roller and an axis of the self-aligning roller bearing, a clearance X between an outer end surface of a spherical roller on an axially outer side of the self-aligning roller bearing and a rib portion, and a clearance Y between an inner end surface of the spherical roller on an axially inner side of the self-aligning roller bearing and a guide ring have a relation of X<Y.

Abstract: A ball screw mechanism includes a ball nut member that threadedly engages with a rack shaft via a plurality of balls, and a rolling bearing including an outer ring retained by a housing, an inner ring retained by the ball nut member, and a plurality of rolling elements. The ball screw mechanism moves the rack shaft in an axial direction relative to the housing through rotation of the ball nut member. A method for inspecting the ball screw mechanism includes fixing the outer ring to a fixing jig, pressing the rack shaft in the axial direction while restricting its rotation to rotate the ball nut member together with the inner ring relative to the outer ring, measuring an amount of a run-out of the rack shaft along with the rotation of the ball nut member, and determining whether the amount of the run-out satisfies a predetermined condition.

Abstract: Provided is a vehicle control system that appropriately performs synchronization control for a plurality of control systems. A monitoring circuit generates a command signal when only a first reset signal is input. The monitoring circuit generates a command signal when the state in which only the first reset signal is input is changed to the state in which the input of the first reset signal is stopped. With the command signal, a second clock signal is output to a timer generator as a second timing signal. With the command signal, the second clock signal generated by a second synchronization signal generating circuit is output to a first synchronization signal generating circuit, and a third clock signal generated by the first synchronization signal generating circuit is output to a timer generator as a first timing signal.

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 grinding wheel includes a disc-like member and a grinding stone layer disposed on an outer peripheral surface of the disc-like member. A grinding surface of the grinding stone layer includes a cylinder grinding surface, end grinding surfaces, and corner grinding surfaces. The grinding stone layer includes a cylindrical-portion grinding stone layer including a part of the corner grinding surfaces and the cylinder grinding surface, and end grinding stone layers including the remaining part of the respective corner grinding surfaces and the respective end grinding surfaces and having a property different from a property of the cylindrical-portion grinding stone layer. Joint surfaces are each formed by joining a boundary surface of the cylindrical-portion grinding stone layer and a boundary surface of the end grinding stone layer such that the boundary surfaces have a preset inclination ? to an axis of rotation.

Abstract: A damper pulley manufacturing method includes an arranging process in which a circular hub having a cylindrical outer peripheral surface and a circular pulley having a cylindrical inner peripheral surface are arranged such that the cylindrical outer peripheral surface opposes the cylindrical inner peripheral surface, a centering process in which a tapered portion of a first centering jig is made to abut on an axial end portion of the hub and a tapered portion of a second centering jig is made to abut on an axial end portion of the pulley to perform centering of the hub and the pulley, and a press-fitting process in which after the centering process, a damper rubber is press-fitted between the cylindrical outer peripheral surface and the cylindrical inner peripheral surface.

Abstract: An actuator includes a motor, a first gear coupled to the motor, a second gear that meshes with the first gear, and a clutch. The clutch includes an outer ring and an inner ring. A plurality of wedge spaces are formed along a circumferential direction between an inner peripheral surface portion of the outer ring and an outer peripheral surface portion of the inner ring. The clutch further includes rolling elements provided in the wedge spaces. While a radial load is not applied to the outer ring, each rolling element does not engage with the outer peripheral surface portion or the inner peripheral surface portion, so that a clearance is generated. While the radial load is applied to the outer ring, each rolling element engages with the outer peripheral surface portion and the inner peripheral surface portion without the clearance.

Abstract: A ball screw device includes a screw shaft, a nut, and a housing that has a bottomed cylindrical shape and to which the nut is attached. The ball screw device converts rotational motion of the screw shaft into linear motion of the housing. The ball screw device is switched between a normal use state and a supply state. In the normal use state, along with the linear motion, a bottom portion of the housing reciprocates between a first position spaced apart from an end of the screw shaft and a second position closer to the end. In the supply state, along with the linear motion, the bottom portion of the housing is located in a third position even closer to the end of the screw shaft, such that grease present in the nut and the bottom portion of the housing is introduced to a radially inner side of the nut.