Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.

Abstract: An urging member urges a first end of a worm shaft toward a worm wheel via a first bearing. The worm shaft includes a tooth flank forming portion and a non-tooth flank forming portion formed between the first end and the tooth flank forming portion. In a housing, a shaft housing portion that houses the worm shaft includes a substantially straight portion and a reduced diameter portion. The substantially straight portion has a substantially constant bore diameter, and extends in an axial direction of the worm shaft. The reduced diameter portion is arranged on the first end side with respect to the substantially straight portion, and has a bore diameter reduced from a position that overlaps tooth flanks in the axial direction to a position that overlaps the non-tooth flank forming portion in the axial direction.

Abstract: In a manufacturing method for a sliding member, a nitrogen diffusion layer, a nitrogen compound layer, and an oxidation layer are formed by executing a first step of cooling a workpiece formed of a steel material after heating the workpiece in an atmosphere containing ammonia at 570 to 660° C., a second step of performing, subsequently to the first step, tempering while pressurizing a front surface side of the workpiece, and a third step of performing, subsequently to the second step, steam treatment of heating the workpiece in a steam atmosphere.

Abstract: A method of manufacturing a spline telescopic shaft includes a masking step in which, in a prescribed axial-direction region of an intermediate manufacturing product, partial tooth grooves that are equally spaced circumferentially are respectively covered by masking members that are equally spaced circumferentially; a resin coating step in which a resin layer is formed, and inner surfaces of the partial tooth grooves covered by the masking members are left as metal exposed portions that are equally spaced circumferentially; and a coating film forming step in which, in a state where the intermediate manufacturing product provided with the resin layer is centered with respect to a broach via the metal exposed portions, the intermediate manufacturing product and the broach are caused to slide relative to each other in an axial direction by press-fitting such that the resin layer is shaved to form a resin coating film.

Abstract: A grease composition includes a base oil, a thickener, and zirconium oxide particles. The base oil is a poly-?-olefin. The zirconium oxide particles have a median diameter D50 of 0.6 ?m to 4 ?m. A content of the zirconium oxide particles is 2% by mass to 15% by mass with respect to a total amount of the base oil and the thickener.

Abstract: A grease composition includes a base oil, a thickener, and polymethyl methacrylate particles. The base oil is a poly-?-olefin. The polymethyl methacrylate particles have an average particle size of 2 ?m to 7 ?m. A content of the polymethyl methacrylate particles is 10% by mass to 20% by mass with respect to a total amount of the base oil and the thickener.

Abstract: An inner ring unit includes an inner ring, a plurality of tapered rollers, and a cage having an annular shape. The cage includes a plurality of cage bars. The cage includes a stopper portion that is provided to protrude from an axial intermediate portion of the cage bar in the circumferential direction of the cage and configured to hinder the tapered rollers from falling off toward a radially outer side by bringing an axial intermediate portion on an outer peripheral surface of each tapered roller housed in a pocket into contact with the stopper portion. The axial intermediate portion on the outer peripheral surface of the tapered roller is a portion that is disposed on a one axial side and on the radially outer side of the tapered roller with respect to the center of gravity of the tapered roller.

Abstract: A quality estimation device for an additive product includes an imaging device configured to illuminate a region including a molding surface during manufacturing of the additive product and image the region, when manufacturing the additive product at a molding position by irradiating with a light beam and a material powder melting and solidifying, a luminance acquisition unit acquires a luminance obtained by quantifying a brightness of a light reflected by at least the molding surface of the region in an image in which the imaging device images the region, and a molding density estimation unit estimates a molding density indicating a density of the material powder in a solidified state after melting based on the luminance of the molding surface acquired by the luminance acquisition unit. The material powder is supplied to the molding position.

Abstract: If a B system microcomputer is reset and reactivated while an A system microcomputer is operating normally, tasks of the A system microcomputer and tasks of the B system microcomputer can be synchronized. The B system microcomputer is reset when voltage applied to a battery decreases and falls below an operation guarantee voltage. Thereafter, when the applied voltage becomes equal to or higher than the operation guarantee voltage and the B system microcomputer is activated, the B system microcomputer outputs a request signal for requesting a synchronization signal to the A system microcomputer. The A system microcomputer outputs the synchronization signal synchronized with a periodic task. The B system microcomputer determines an execution timing of the periodic task based on the synchronization signal.

Abstract: A power supply voltage monitoring circuit includes a power supply switching circuit, a series circuit including a first series resistor connected to an input power supply line, a second series resistor connected to a ground potential, and a third series resistor connected between the first series resistor and the second series resistor, a first parallel circuit including a first switching element and connected in parallel to the first series resistor, a second parallel circuit including a second switching element and connected in parallel to the second series resistor, a first determination circuit configured to determine whether a first divided voltage between the first series resistor and the third series resistor is in a normal range, and a second determination circuit configured to determine whether a second divided voltage between the second series resistor and the third series resistor is in a normal range.

Abstract: A steering angle calculation apparatus includes an electronic control unit configured to calculate a steering angle based on a torque caused by a driver and at least one of vehicle information, surrounding environment information, and driver information.

Abstract: A multi-stage planetary roller power transmission device includes a high-speed power transmission mechanism including a first sun shaft, a first fixed ring, first planetary rollers disposed between the first sun shaft and the first fixed ring with a first negative clearance, first support shafts, and an annular first carrier into which the first support shafts are press-fitted; and a low-speed power transmission mechanism including a second sun shaft, a second fixed ring, second planetary rollers disposed between the second sun shaft and the second fixed ring with a second negative clearance, second support shafts, and an annular second carrier into which the second support shafts are press-fitted. A clearance amount of the first negative clearance and a clearance amount of the second negative clearance are equal to each other, and the number of the first planetary rollers is smaller than the number of the second planetary rollers.

Abstract: A method for controlling a power steering system of a vehicle, having a steering wheel, and an inverter powering an assist motor, when a short-circuit failure is detected between a phase of the assist motor and an electric line of the inverter, wherein it includes:—a configuration step intended to determine, for a magnetic field of the assist motor, a controllable zone and a non-controllable zone, —a step of compensating for a space-average brake torque in the controllable zone.

Abstract: A steering device includes an electric motor and an electronic control unit controls the electric motor. The electronic control unit includes a first friction torque computation circuit, a second friction torque computation circuit, a first load torque-column angle estimation circuit, a pinion angle estimation circuit, a second load torque estimation circuit, and an axial force estimation circuit. The first friction torque computation circuit computes first friction torque. The second friction torque computation circuit computes second friction torque. The first load torque-column angle estimation circuit estimates first load torque and a column angle. The pinion angle estimation circuit estimates an estimated pinion angle value. The second load torque estimation circuit estimates second load torque. The axial force estimation circuit estimates an axial force that acts on a rack shaft.

Abstract: A sealing member includes a sliding portion made of a vulcanized rubber composition. The rubber composition includes a carboxyl-containing acrylic rubber, a silica, and a glass fiber. A content of the silica is 25 to 100 parts by weight per 100 parts by weight of the carboxyl-containing acrylic rubber.

Abstract: An abnormality detection apparatus for working tools configured to be used in a machining process performed by a machine tool, the abnormality detection apparatus includes a storage portion which previously stores correlations between features of a plurality of operating portions relation to the machining process performed by the machine tool, and a tool condition of each of a plurality of working tool types, and a tool condition determining portion which determines the tool condition of the working tools based on the correlations.

Abstract: A housing includes a case made of a resin material and having an open side, and a cover that covers the open side of the case. Screw holes that are open toward the cover are formed in a side wall of the case. Through holes are formed in the cover at positions facing the respective screw holes. The cover is fastened to the case by screwing cover bolts into the respective screw holes through the respective through holes. Insertion holes are formed to extend through the side wall in an assembly direction of the cover with respect to the case. The housing is attached to an attachment target made of a metal material, by screwing attachment bolts into respective attachment holes in the attachment target through the respective insertion holes. The attachment bolts are formed to press the cover against the side wall when inserted in the respective attachment holes.

Abstract: A needle roller thrust bearing includes an annular cage and a plurality of rollers. The cage includes a plurality of cage pockets that is radially disposed. The plurality of rollers is housed in the cage pockets and disposed between a first raceway surface and a second raceway surface that axially face each other. Lubricating oil flows from a radially inner side to a radially outer side in an annular space in which the cage and the rollers are provided. The cage includes inner grooves and drainage grooves. Each of the inner grooves connects a circumferentially adjacent pair of the cage pockets by connecting radially inner areas of the pair of cage pockets. Each of the drainage grooves has an opening at an outer circumferential surface of the cage to drain lubricating oil in a circumferential area including radially outer areas of the cage pockets.

Abstract: A crosswind effect estimation device is mounted in a vehicle and configured to estimate an effect on the vehicle due to a crosswind. The crosswind effect estimation device includes a processor configured to i) acquire information on the crosswind in a predetermined region forward of the vehicle in a traveling direction of the vehicle, ii) acquire information on a shielding object that is located on a windward side in a direction of the crosswind, and iii) estimate the effect on the vehicle due to the crosswind based on the acquired information on the crosswind and the acquired information on the shielding object.

Abstract: A control device includes a processor. The processor is configured to perform a route acquisition process for acquiring route information indicating a target route of a vehicle. The processor is configured to perform a behavior optimization process for correcting, based on at least one of a plurality of state quantities indicating a behavior of the vehicle during traveling, each of a left turning command value and a right turning command value such that the behavior of the vehicle becomes a target behavior. The processor is configured to perform a locus stabilization process for correcting, based on at least one of the state quantities indicating the behavior of the vehicle during traveling, a steering command value such that the vehicle travels on the target route.