Abstract: A driving force transmission device includes an input rotation member, an output rotation member, a multiple-disc clutch, a pressing mechanism, and a control device including a current supply circuit. The control device is configured to compute a torque command value, to compute a current command value, to correct the current command value, and to control the current supply circuit such that an electric current depending on the current command value is supplied to the pressing mechanism. The control device is configure to correct the current command value by a correction amount in a constant-torque state after the torque command value changes, the constant-torque state being a state where a change rate of the torque command value is in a predetermined range, the correction amount depending on a duration of the constant-torque state.

Abstract: Provided is a motor device capable of detecting entry of water into a housing before a control circuit is submerged. A first motor bus bar includes a first U-phase motor bus bar, a first V-phase motor bus bar, and a first W-phase motor bus bar. A first control circuit is connected to the first motor bus bar. The first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar are disposed on the lower side with respect to the first control circuit in a gravity direction. The first control circuit detects entry of water into a motor housing of the motor device, based on the status of power supply to the first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar.

Abstract: A wear amount measuring device includes: a light emitting unit configured to emit light on an object to be measured having a wear surface; an imaging unit configured to obtain an image of the object; and a calculation unit configured to calculate a wear amount by specifying a wear surface of the object from the obtained image. A positional relationship between the light emitting unit, the imaging unit, and the object is set such that, when a dummy object to be measured having a wear surface is arranged in place of the object, the light emitting unit and the imaging unit have a specular reflection relationship relative to the wear surface of the dummy object. The calculation unit calculates the wear amount by specifying the wear surface based on a difference in brightness of the image.

Abstract: A power steering system for a motor vehicle, having a steering column integrating an upper shaft and an intermediate shaft rotatably linked and movable in translation relative to one another, an upper tube and a lower tube rotatably linked and movable in translation relative to one another, the upper shaft being movable in rotation and linked in translation within the upper tube, and an assist module integrating an output shaft linked in rotation with the intermediate shaft via a torsion bar, a reducer having a worm screw driven by an assist motor and which meshes on a worm wheel linked to the output shaft; and an angle measuring device having an inductive sensor carried by an annular support having a central orifice dimensioned so as to let the upper tube pass, a lower target securely mounted around the output shaft and an upper target.

Abstract: To provide a gear machining apparatus capable of correcting a tooth trace error without using a special tool when a hob cutter is cantilever-supported. A gear machining apparatus includes a hob cutter machining a tooth profile on a workpiece, a tool spindle device rotatably cantilever-supporting the hob cutter, a workpiece spindle device rotatably supporting the workpiece, a driving device moving the tool spindle device and the workpiece spindle device relatively to each other, a measuring device measuring the value corresponding to a bending amount of the hob cutter or a rotation synchronization shift of the workpiece spindle device with respect to the tool spindle device and a correction processing unit correcting a cutting amount of the hob cutter T or the rotation synchronization shift of the workpiece spindle device with respect to the tool spindle device based on the value measured by the measuring device.

Abstract: An extendable shaft includes: an inner shaft including a plurality of external teeth; an outer shaft including a plurality of internal teeth that slides relatively to the external teeth; and a resin layer covering the external teeth. The pressure angle of the external teeth is different from the pressure angle of the internal teeth.

Abstract: A production management system includes a plurality of production facilities, a first operation instruction provider, and a management device. The first operation instruction provider gives a first operator an instruction to deliver workpiece into and out of a predetermined one of the production facilities in accordance with a production plan and operating statuses of the production facilities and acquires an operation status of each of the first operators. The management device transmits, to the production facility into which the workpiece has been delivered, process data for activation of the production facility in accordance with the status of delivery of the workpiece into and out of each of the production facilities.

Abstract: A steering column device includes a steering shaft; and a steering column. The steering column includes a housing, a cover, and a sealing member. The housing includes an inclined portion having an inclined surface with an inside diameter increasing from a first side to a second side, the inclined surface contacting the sealing member from the first side. The cover includes a facing portion having a facing surface contacting the sealing member from the second side, and an insertion portion having an outer peripheral surface contacting the sealing member from an inner peripheral side. The sealing member is accommodated in an accommodation space defined by the inclined surface, the facing surface, and the outer peripheral surface. An escape space continuous with the accommodation space is provided between the housing and the cover, the escape space being located closer to the first side than the inclined surface is.

Abstract: A clutch device includes a plurality of clutches; a plurality of cylinder chambers provided to respectively correspond to the clutches; a pump configured to discharge a hydraulic fluid; a plurality of control valves each of which is configured to control the hydraulic fluid supplied from the pump to a corresponding one of the cylinder chambers; and an oil passage that distributes the hydraulic fluid discharged from the pump, to the control valves. The oil passage includes at least one split point at which the hydraulic fluid discharged from the pump splits. At least one check valve is provided between the at least one split point and at least one control valve among the control valves, the at least one check valve being configured to block a flow of the hydraulic fluid in a direction from the at least one control valve toward the at least one split point.

Abstract: A steering device includes: a first moving unit that moves in an axial direction along with a shaft member to which an operating member is connected; a second moving unit; a holding unit; a first screw mechanism; a second screw mechanism; a driving unit; and a transmission mechanism that transmits driving force of the driving unit to the first screw mechanism and the second screw mechanism. One of the first screw mechanism and the second screw mechanism is provided so as to operate in a forward direction when the operating member moves between a retraction region and an operation region, and reverse efficiency of that one screw mechanism is set such that when the operating member is subjected to an external force directed toward the retraction region, that one screw mechanism does not operate in a reverse direction.

Abstract: The steering control system of a steer-by-wire vehicle includes a turning angle calculation unit for calculating a target turning angle based on a steering angle of a steering wheel, and a reaction torque calculation unit for calculating a target reaction torque based on a state of the vehicle. When an alert request is issued, the reaction torque calculation unit calculates a basic reaction torque based on the steering angle, calculates an alert reaction torque for notifying a vehicle state, and calculates the target reaction torque obtained by summing the basic reaction torque and the alert reaction torque. In a process of calculating the target turning angle from the steering angle, the turning angle calculation unit calculates the target turning angle by excluding a steering angle or a turning angle corresponding to the alert reaction torque.

Abstract: A pump apparatus includes a housing, a shaft, a rotor, a plurality of vanes, a pressure relief passage, and a bearing. The housing includes suction ports and discharge ports. The rotor and the vanes transport hydraulic oil to the discharge ports. The hydraulic oil is sucked from the suction ports. The pressure relief passage is defined in a portion of the housing facing an outer peripheral surface of the shaft. The pressure relief passage brings the discharge ports into communication with a low pressure region where the hydraulic oil is low in pressure. When a pressure of the hydraulic oil in the discharge ports is lower than a first predetermined pressure, the bearing keeps the pressure relief passage out of communication with a passage. When the pressure of the hydraulic oil in the discharge ports has increased to reach or exceed the first predetermined pressure, the bearing brings the pressure relief passage into communication with the passage.

Abstract: A thrust roller bearing includes a plurality of rollers and a cage including a plurality of cage pockets for housing the rollers. The rollers each include a cylindrical portion, an outer crowning portion, and an inner crowning portion. The cage pockets each include an outer surface, an inner surface facing a second end surface of the roller, and a pair of side surfaces facing an outer peripheral surface of the roller. The side surfaces each include a recessed surface that is not contactable with the roller, and flat surfaces that are provided on the outer side in the radial direction and on the inner side in the radial direction, respectively, and are contactable with the roller. A first dimension is larger than a second dimension.

Abstract: A rolling bearing includes: an inner ring; an outer ring; a plurality of balls provided between an inner ring raceway and an outer ring raceway; and an annular cage in which the balls are held at intervals in the circumferential direction of the cage. The cage includes an annular body, a plurality of first cage prongs, and a plurality of second cage prongs. A radially outer part of each of the first cage prongs includes a recessed portion. The recessed portion is constituted by a region surrounded by a first side wall surface, a second side wall surface, a bottom wall surface, and a third side wall surface.

Abstract: A motor control device includes a plurality of control units corresponding to a plurality of windings which is provided in a motor. The plurality of control units includes a master control unit, a slave control unit, and at least one abnormality monitoring unit. The slave control unit is configured to generate a power supply control command value using information which is acquired through a path other than communication between the control units and which is held for use in control of supply of electric power to the windings in a normal state in which an abnormality in communication between the control units is not detected and to perform backup control for holding the power supply control command value until the abnormality monitoring unit fixes an abnormality in communication between the control units after detecting the abnormality in communication.

Abstract: A steering system includes an operation member; a first movement mechanism configured to move the operation member between a normal position at which the operation member is operated by a driver, and a storage area located forward of the normal position; and a control unit configured to control the first movement mechanism. The storage area is located inward of an opening of a vehicle member located in front of a driver's seat in the vehicle. The control unit is configured to control, in a case where the operation member is retracted into the storage area, the first movement mechanism to move the operation member forward at a first speed, and to move the operation member forward at a second speed that is lower than the first speed when a distance between the operation member and the vehicle member becomes equal to or less than a predetermined distance.

Abstract: Provided is a steering control device that controls a steer-by-wire steering system for a vehicle and that is capable of reducing erroneous detection of a grip state and improving the robustness in controlling a steering reaction force. The control device includes a road surface axial force calculation circuit that calculates a road surface axial force, based on road surface information. The control device includes a second estimated axial force calculation circuit that calculates a lateral force applied to a rack shaft, based on a yaw rate and a lateral acceleration. The control device includes a grip factor calculation circuit that calculates a grip factor, based on the road surface axial force and the lateral force. The control device varies the steering reaction force in accordance with the grip factor.

Abstract: A rolling bearing includes an inner ring, an outer ring, and a plurality of balls interposed between the inner ring and the outer ring. The inner ring and the outer ring are made of stainless steel. A raceway surface with which the ball is in rolling-contact in each of the inner ring and the outer ring and is a superfinished surface and a coating layer made of a solid lubricating film is formed on the superfinished surface.

Abstract: A power supply circuit includes a first P-channel MOSFET and a first voltage application circuit. The first P-channel MOSFET is provided between an on-board power supply and a vehicular apparatus that is a power supply target, and is configured to switch a power-ON state in which electric power is supplied to the vehicular apparatus and a power-OFF state in which the supply of the electric power is interrupted. The first voltage application circuit is configured to apply a voltage having a potential lower than a potential of the on-board power supply to a gate terminal such that a state of the first P-channel MOSFET is switched to the power-ON state, and apply a voltage having a potential equal to the potential of the on-board power supply to the gate terminal such that the state of the first P-channel MOSFET is switched to the power-OFF state.

Abstract: A workpiece replacing apparatus delivers a pre-machined workpiece into an intra-machine space inside a machine tool from an extra-machine space outside the machine tool, and delivers a workpiece machined by the machine tool to the extra-machine space from the intra-machine space. The workpiece replacing apparatus includes a secured cover, an arm device, and a movable cover. The secured cover is secured to a securing member of the machine tool. The secured cover defines a partition between the intra-machine space and the extra-machine space. The secured cover is provided with an opening. The arm device delivers the workpieces between the intra-machine space and the extra-machine space through the opening. The movable cover is integral with the arm device or in engagement with the arm device such that the movable cover is operable in conjunction with operation of the arm device. The movable cover closes the opening, with the arm device located in the extra-machine space.