Abstract: A lubricating oil used in a friction-type drive power transmission apparatus which includes: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2).

Abstract: There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.

Abstract: A one-way clutch includes an inner ring, an outer ring disposed coaxially with the inner ring, a plurality of rollers interposed between the inner and outer rings, a cage holding the rollers to locate these rollers in a circumferential direction of the inner and outer rings. When the rollers are brought into biting engagement with an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring, the inner and outer rings rotate in unison, and when the rollers are disposed out of biting engagement with the inner and outer rings, the inner and outer rings rotate relative to each other. Grooves are formed in the outer peripheral surface of the inner ring, and each of the grooves serves to increase a contact pressure of the corresponding roller relative to the inner ring at part of a region of contact between the roller and the inner ring.

Abstract: A motor controller and an electric power steering system including the motor controller are provided. The motor controller has a microcomputer. When the on time of one of the lower potential-side FETs corresponding to the respective phases in a drive circuit becomes shorter than the detection time for detecting the phase current value, the microcomputer estimates the phase current value of the electric current undetectable phase based on the phase current values of the two phases other than the electric current undetectable phase corresponding to the relevant FET (blind estimation). When electric current detection is performed in the blind estimation, motor control signals are output, by which the switching state of the switching arm of the electric current undetectable phase is maintained and the power loss caused by the switching operation of the FETs in the two phases other than the electric current undetectable phase is compensated for.

Abstract: A vehicle differential apparatus includes: a differential case; two side gears; and two pinions. An axial center of each pinion is provided with a first pinion shaft insertion hole. A pinion shaft is inserted in the first pinion shaft insertion holes. An inner peripheral surface of the first pinion shaft insertion hole of each pinion is provided with two sliding surfaces that are slidable on one of two pinion inner peripheral surface-supporting portions of the pinion shaft, and a non-contacting surface that is not able to contact the pinion inner peripheral surface-supporting portion. The sliding surfaces and the non-contacting surface of each first pinion shaft insertion hole are disposed at positions adjacent to each other in the axis direction of the first pinion shaft insertion hole.

Abstract: A ball screw includes a screw shaft, in which a thread groove is formed in an outer peripheral face thereof, that includes a small-diameter portion with a diameter smaller than an outer diameter of the screw shaft formed integrally at one end of the screw shaft; a nut, through which the screw shaft passes, having a thread groove formed in an inner peripheral face thereof; a plurality of balls disposed in a ball passage formed by the thread groove of the screw shaft and the thread groove of the nut; and a ring-shaped stopper, immovably fitted on the small-diameter portion, that prevents the nut from moving.

Abstract: A sliding type tripod constant velocity joint includes an outer ring of a tubular form having three raceway grooves which are formed on an inner peripheral surface and which extend in a direction of a rotation axis of the outer ring, a tripod including a boss part connected to a shaft and three tripod shaft parts which are provided upright so as to extend outward in a radial direction of the boss part from an outer peripheral surface of the boss part and which are inserted into the raceway grooves, respectively, and an intermediate member which is provided on an outer periphery of a corresponding one of the tripod shaft parts so as to be oscillated relative to the corresponding one of the tripod shaft parts and which has power transmission surfaces on both side surfaces and opposing the side surfaces of a corresponding one of the raceway grooves.

Abstract: A multilayer circuit board in which wirings are arranged so that the inductance thereof is reduced. A ground wiring and a power source wiring which are provided in a multilayer circuit board are arranged so that most of the wirings are superposed vertically along a direction of a longer side of the circuit board, and since currents flow in an opposite direction to each other in the portions which are superposed, magnetic fields generated by the currents so flowing are canceled by each other. Similarly, a W-phase wiring, a V-phase wiring and a W-phase wiring are also arranged so that the wirings are partially superposed along their longer side direction vertically, and magnetic fields generated by currents flowing in the portions which are superposed vertically are canceled by one another. By this, the inductance of the wirings can be reduced by increasing a mutual inductance between these wirings.

Abstract: A grinding machine includes: a workhead (22) that rotatably supports a solid cylindrical or hollow cylindrical workpiece (W); a grinding wheel (43) that moves relative to the workhead (22) in a direction that intersects with a rotation axis of the workhead (22) to grind an outer peripheral surface of the workpiece (W); a measuring apparatus (50) that measures a position of an outer peripheral surface of the workpiece (W) corresponding to a rotation angle of the workhead (22); an outer peripheral surface shape calculation unit (64) that calculates an outer peripheral surface shape of the workpiece (W) on the basis of the position of the outer peripheral surface of the workpiece (W) measured by the measuring apparatus (50) during grinding; and a grinding condition determination unit (65) that determines a condition of grinding, which is performed after measurement by the measuring apparatus (50), on the basis of the calculated outer peripheral surface shape of the workpiece (W).

Abstract: A method of producing a seal member includes: a mixing step of mixing an elastic material and fine particles using a kneading device, so as to form a mixed material; a molding step of charging the mixed material into a molding die, and forming an elastic molded piece having a shape corresponding to that of a molded seal of the seal member; and a particle removing step of removing the fine particles present on a surface of the elastic molded piece, so as to form the molded seal.

Abstract: A sliding type tripod constant velocity joint includes an outer ring of a tubular form having three raceway grooves which are formed on an inner peripheral surface and which extend in a direction of a rotation axis of the outer ring, a tripod including a boss part connected to a shaft and three tripod shaft parts which are provided upright so as to extend outward in a radial direction of the boss part from an outer peripheral surface of the boss part and which are inserted into the raceway grooves, respectively, and a pair of intermediate members which are arranged so as to sandwich a corresponding one of the tripod shaft parts from both sides of side surfaces of the raceway grooves and which are provided so as to be oscillated relative to the corresponding one of the tripod shaft parts.

Abstract: A variable transmission ratio mechanism comprises: an input member capable of rotating around a first axis; and an intermediate member that allows the differential rotation of the output member. The intermediate member is capable of rotating around a second axis that is slanted relative to the first axis. On first and second power transmission surfaces of the intermediate member, corresponding first and second engaging sections are respectively arranged according to corresponding first and second arrangement pitch circles centered on the second axis. On corresponding first and second engagement circles centered on the first axis, the first and second engaging sections are respectively engageable with corresponding first and second engageable sections. The diameter of the first arrangement pitch circle differs from the diameter of the second arrangement pitch circle.

Abstract: A vehicle steering apparatus in which a mechanical coupling between a steering member and steered wheels is uncoupled, includes a steering actuator for driving a steered mechanism and a control unit for drive-controlling the steering actuator. The control unit reduces steering-stiffness using a PID control portion for drive-controlling the steering actuator according to a deviation between a target steered angle and a steered-angle detected by the steered angle sensor. A gain setting portion sets gains of the PID control portion to be relatively low when a predetermined condition is satisfied.

Abstract: A solenoid valve device includes: a solenoid valve that includes a solenoid that is supplied with driving current to generate magnetic flux, and a valve element that is moved by the magnetic flux generated from the solenoid; and a control device that controls the solenoid valve. The control device includes an alternating current component in the driving current and supplies the driving current including the alternating current component to the solenoid, and detects an impedance of the solenoid.

Abstract: A rotational angle sensor includes: a magnet rotor in which multiple magnetic poles are formed along the circumferential direction of the magnet rotor; and three sensor devices that are arranged on a circle concentric with the magnet rotor at regular angle intervals. Each of the sensor devices includes three half-bridge circuits each of which has a pair of spin valve magnetic resistances that are connected in series in such a manner that the magnetization directions of spin fixed layers of the spin valve magnetic resistances are opposite to each other. Each of the sensor devices is formed in such a manner that phases of the sensor signals output from the respective half-bridge circuits based on a change in magnetic flux caused by the rotation of the magnet rotor are offset from each other by an electrical angle of 120°.

Abstract: In a vehicle bearing device hub spindle, annular first to third grinding undercut portions, each being a recess in sectional view, are formed in the same shape, through turning, at a large-rib-surface-side end portion of an inner raceway surface, a large-diameter-portion-side end portion of the inner raceway surface, and a large-diameter-portion-side end portion of an outer peripheral surface of an intermediate-diameter portion.

Abstract: An electric power steering device includes a first housing that supports an output shaft rotatable together with a driven member with a first bearing placed there between and a second housing that rotatably supports a driving member. The first housing includes an eccentric engagement section that is eccentric with respect to a first bearing holding section holding the first bearing. The eccentric engagement section is fitted to an engagement section of the second housing. When the center-to-center distance between the driving member and the driven member is adjusted, the eccentric engagement section of the first housing is rotated with respect to the engagement section of the second housing.

Abstract: A bearing mechanism 1 includes a housing 3 having a cylindrical inner peripheral surface 2, a rack shaft 5 inserted and secured in the housing 3 and having a cylindrical outer peripheral surface 4, and a sliding bearing 6 interposed between the inner peripheral surface 2 of the housing 3 and the outer peripheral surface 4 of the rack shaft 5.

Abstract: In an electric power steering system, when a motor rotation angular speed ? and a motor rotation angular acceleration ? of a steering assisting motor both exceed corresponding predetermined values ?s and ?s, respectively, an abnormal external force application-determining section determines that an external force equal to or greater than a predetermined value is applied to a steering mechanism, and sets an abnormal external force application determination flag (FLG) to 1. When the abnormal external force application determination flag (FLG) is 1, a d-axis electric current command value-calculating section activates a motor rotation angular speed-reducing section and performs field-strengthening control based on a motor rotation speed/d-axis electric current command value map.

Abstract: It is an object of the present invention to provide a steering apparatus for a vehicle mounting a steering lock device to an upper tube by small numbers of constructing parts. A guide supporting mechanism guiding and supporting a upper tube in relation to a lower housing along an axial direction of the upper tube includes a guide bracket portion fixed to the upper tube, and a guide portion mounted in the lower housing to guide and support the guide bracket along the axial direction of the guide tube. A steering lock device locking and unlocking rotation of the upper shaft includes a lock housing guiding a cylinder in back and forth direction, and a lock bracket portion mounted in a shape of grasping the upper tube by the lock housing therewith. The guide bracket and the lock bracket portion are formed to one piece as a whole.