Abstract: An outer ring has a tapered tubular portion having a tapered raceway surface, a small diameter side extension portion that extends radially outward from a small diameter side edge of the tapered tubular portion, and a large diameter side extension portion that extends from a large diameter side edge of the tapered tubular portion in a direction away from the axis of the outer ring. The small diameter side extension portion and the large diameter side extension portion are larger in thickness than the tapered tubular portion.

Abstract: A first rotation angle computing unit computes a first rotation angle corresponding to a rotation angle of a rotor based on an output signal of a first magnetic sensor and an output signal of a second magnetic sensor. A second rotation angle computing unit computes a second rotation angle corresponding to the rotation angle of the rotor based on the output signal of the second magnetic sensor and an output signal of a third magnetic sensor. A rotation angle selection unit determines a final rotation angle using the first rotation angle and the second rotation angle.

Abstract: A motor includes a cylindrical stator. The stator includes a stator core having teeth, which project inwardly in the radial direction, and coils, which are formed by winding a conductive wire onto each tooth with first and second insulators. The first insulator includes a support extending axially from an outer restriction wall. Each of first to third bus bars is supported by the support of the first insulator in a state in which a main portion is exposed. The main portions of the first to third bus bars are thus in contact with ambient air.

Abstract: An electric pump unit for a transmission, which supplies a hydraulic pressure to the transmission, includes: a pump which takes in and discharges oil; and a pump driving electric motor including a motor shaft connected to the pump, a motor rotor fixedly provided on the motor shaft, and a motor stator disposed around a circumference of the motor rotor. The pump and the electric motor are integrated with a lid that tightly closes an opening in a recess portion which is formed on a transmission housing of the transmission and into which the oil is introduced, and are accommodated within the recess portion.

Abstract: A ball screw unit includes a screw shaft that includes a screw groove, a ball screw nut that is screwed to the screw shaft via balls and that rotates to move the screw shaft linearly in an axial direction of the screw shaft, a hollow shaft that rotates together with the ball screw nut, a housing that rotatably supports the hollow shaft via a rolling bearing, and an elastic member that is provided at a position between the rolling bearing and the housing.

Abstract: A master servo motor and a slave servo motor that synchronously drive for rotation a master main spindle provided with a center that supports one end of a work piece and a slave main spindle provided with a center that supports the other end of the work piece are included. Before grinding, a slip detection cycle that detects a limit current value for the servo motors, at which the work piece and the centers slip, is executed and, during grinding, a grinding condition is changed to prevent a slip between the work piece and the centers in advance at the time when any one of current values of the servo motors has reached a slip threshold value set on the basis of the limit current value.

Abstract: A lip portion consists of two cylindrical axial lips 421, 422 extended in parallel to an axial direction of a seal 4 and in different lengths (a radial lip is obviated). A neck 22 of a cross shaft 2 is formed with a neck slant portion 221 defined by a conical surface inclined at 45° relative to an axis thereof. The two axial lips 421, 422 are pressed against the neck slant portion in the axial direction.

Abstract: A supercharger includes a housing, and a turbine shaft supported in a center hole in the housing through rolling bearings. Lubricating oil for the rolling bearings exists only within the housing. A cooling water jacket is provided within a body portion of the housing over a region from one axial end portion of the body portion to the other axial end portion thereof.

Abstract: In a manufacturing method for a grinding wheel in which a plurality of wheel chips each composed of an abrasive grain layer containing superabrasive grains and a foundation layer are adhered to a core attached to a wheel spindle carried by a wheel head of a grinding machine to be drivingly rotatable about a rotational axis and in which a grinding surface formed on the abrasive grain layers grinds a workpiece, drivingly rotatably supported by a workpiece support device of the grinding machine, in contact at a grinding point, the method forms green wheel chips each having opposite ends in a wheel circumferential direction inclined relative to the wheel circumferential direction, bakes the green wheel chips to form baked wheel chips, and adheres the plurality of baked wheel chips to the core so that an oblique groove is formed between adjoining abrasive grain layers.

Abstract: A motor vehicle steering system includes a transmission ratio variable mechanism capable of changing a transmission ratio, and a steering-assist-force imparting mechanism. The transmission ratio variable mechanism is provided with an input member and an output member capable of rotation about a first axis, a first bearing ring for differentially rotatably coupling to each of the input and output member, a second bearing ring for rotatably supporting the first bearing ring via a rolling element, and an electric motor for rotation-driving the second bearing ring. A second axis that is a center line of the first bearing ring and the second bearing ring is inclined relative to the first axis.

Abstract: A planetary carrier, formed of a cylindrical body, that receives a drive torque from a drive power source and differentially distributes the drive torque to a pair of output shafts, the planetary carrier including a gear holding portion that rotatably holds a planetary gear having two large and small gear portions, of which pitch circle diameters differ from each other. The gear holding portion has a first supporting surface that slidably supports tooth tip surfaces of the gear portion, of which the pitch circle diameter is larger, on a portion except on the radially inner side with respect to the carrier, and a second supporting surface that slidably supports tooth tip surfaces of the gear portion, of which the pitch circle diameter is smaller, on a portion except on the radially outer side with respect to the carrier.

Abstract: A vehicle steering device (1) has a steering actuator (14) for steerable wheels (5) to be steered according to operation of a steering member (2), a transmission mechanism (18) including cables (22, 23), a connection mechanism (19) for allowing and interrupting mechanical connection between the steering member (2) and the wheels (5), and control unit (9). When the steering actuator (14) is normal, the control unit (9) causes the connection mechanism (19) to release mechanical connection between the steering member (2) and the wheels (5) and drives and controls the steering actuator (14) according to operation of the steering member (2). The control unit (9) includes a fail detecting section (29) for detecting, when the steering actuator (14) is normal, a fail of the transmission mechanism (18) based on a load on the steering actuator (14).

Abstract: A gap with a predetermined size is formed between adjacent links arranged in a chain width direction, the size of the gap is set smaller than a maximum warpage amount of the links.

Abstract: A lock device that restricts movement of a movable body includes: a lock member that is engageable with an engagement portion formed at the movable body; an urging member that urges the lock member in a direction away from the engagement portion; and an actuator that moves the lock member toward the engagement portion to engage the lock member with the engagement portion against an urging force generated by the urging member.

Abstract: A motor control device with which both high-accuracy current detection and improvement in voltage utilization factor are achieved is provided. When an ON time of any one of low potential side switching elements corresponding to respective phases in a driving circuit is shorter than a detection time of a current value, a microcomputer estimates a phase current value of a current undetectable phase based on current values of two phases other than the current undetectable phase corresponding to the said FET. Then, at the time of current detection using the blind correction, during current detection for two phases, other than the current undetectable phase, based on which the blind correction is performed, motor control signals for maintaining switching states of a switching arm corresponding to the current undetectable phase are output.

Abstract: In a vitrified bonded grinding wheel that is formed so that superabrasives formed of cubic boron nitride (CBN) grains or diamond grains are bonded and held with a vitrified binder, the vitrified binder is formed of oxide particles and amorphous glass, and the vitrified binder has no open pore that is in fluid communication with outside air.

Abstract: A double row thrust roller bearing includes a pair of inner and outer cages arranged radially in two rows in separate coaxial relation, each cage including an annular inner peripheral wall, an annular outer peripheral wall, a plurality of pillar portions interconnecting the annular inner and outer peripheral walls at intervals in a circumferential direction thereof, and a plurality of pockets each formed between the adjacent pillar portions. Rollers are rotatably held and retained respectively in the pockets. The annular inner peripheral wall of the inner cage is guided by an annular flange formed at an inner peripheral edge of one race, and the annular inner peripheral wall of the outer cage is guided at an inner periphery thereof by the annular outer peripheral wall of the inner cage.

Abstract: It is one object of the present invention to provide a steering device for a vehicle improving a resolution of detecting a steering reaction force thereby to control precisely a reaction actuator and to improve a steering feeling. The steering device for the vehicle is equipped with a reaction actuator 19 acting a steering reaction force on a steering wheel 1. This device further includes a steering angle sensor 11 detecting a steering angle ?h of the steering wheel 1, a controller 20 controlling the reaction actuator 19 according to the steering angle ?h, a torque sensor 12 detecting a steering torque Th acted on the steering wheel 1. The controller 20 controls in a feedback way the reaction actuator 11 based on the steering torque Th in a predetermined range including a middle point of the steering angle. The controller 20 drives, in a open-loop way without feed-backing the steering torque Th, the reaction actuator 19 out of the predetermined range of the steering angle ?h.

Abstract: A microcomputer 17 (signal generating section 24) includes an attenuating section 31, which attenuates a specific frequency component included in an input signal. The attenuating section 31 receives a d-axis current value Id and a q-axis current value Iq, which are actual currents supplied to a motor 12. The attenuating section 31 receives a rotational angular velocity ?e of the motor 12. The attenuating section 31 changes the specific frequency component to be attenuated based on the input rotational angular velocity ?e. Then, the microcomputer 17 executes current feedback control for feeding power to the motor 12 based on the d-axis current value Id? and the q-axis current value Iq? that have been attenuated.

Abstract: A curvature radius of a raceway groove of an inner ring of a first bearing supporting a first end portion of a worm shaft and a curvature radius of a raceway groove of an outer ring of the first bearing are larger than 50% of a diameter of each rolling element of the first bearing, whereby the worm shaft is pivotable about the first end portion. Internal clearances in the first bearing are eliminated because the first bearing is pressed in a radial direction by a pressing member. When the worm shaft vibrates relative to a housing in an axial direction, paired second elastic members and damp and absorb the vibration.