Abstract: A cam device includes a cam, a cam roller, a rotary drive device, a linear motion guide device, and an action unit. A cam profile of the cam includes a rotary end at a circumferential one end, at which a camshaft is non-rotatable in a reverse direction by the cam roller, a cam surface from the rotary end to the circumferential other end, on which the cam roller is abuttable, and formed of a single CV curve from a vicinity of the rotary end to the circumferential other end of the cam surface, and a non-continuous section formed between the rotary end and the circumferential other end of the cam surface and not in contact with the cam roller.

Abstract: A drive wheel, comprising: a first input shaft and a second input shaft coaxially disposed; a first output shaft and a second output shaft disposed on different axes; a first spur gear mechanism that transmits rotational force of the first input shaft to the first output shaft; a second spur gear mechanism that transmits rotational force of the second input shaft to the second output shaft; a wheel connected to an axle; a pivot shaft that supports the wheel in a pivotable manner via the axle; a first power conversion mechanism that transmits the rotational force of the first output shaft to one end portion of the axle; a second power conversion mechanism that transmits the rotational force of the second output shaft to another end portion of the axle; a first slide mechanism; a second slide mechanism; and an elastic member.

Abstract: A steering device includes a steering shaft, a steering column, a bracket, and a fastening mechanism. An upper column includes a clamp, a cylindrical part, a pair of protrusions, and contact ribs. The clamp includes a continuous clamp and a spaced clamp. The protrusions include a continuous protrusion and a spaced protrusion. The contact ribs include first contact ribs disposed each of which is disposed on the outer peripheral surface of the clamp, second contact ribs each of which is disposed on a side surface of the protrusion and disposed opposite to the first contact rib with respect to a long groove, and at least one third contact rib disposed on a side surface of the spaced protrusion and between the first contact rib and the long groove. The third contact rib has a protrusion amount greater than those of the first contact rib and the second contact rib.

Abstract: A linear motion guide device having a long-life slider is provided. The linear motion guide device includes a guide rail, a plurality of rolling elements, and a slider. The material of the slider body 11 is alloy steel containing 0.1 mass % or more and less than 0.3 mass % of C, 0.5 mass % or more and 1.5 mass % or less of Cr, and 0.1 mass % or more and 0.4 mass % or less of Si, with the balance being Fe and inevitable impurities. An amount of retained austenite in a surface layer 14F of a slider-side rolling groove 14 subjected to a carburizing heat treatment is 15 vol % or more and 45 vol % or less. The surface hardness of the slider-side rolling groove 14 is Hv 650 or more.

Abstract: A steering device includes an input shaft coupled to a steering wheel and extending in an axial direction, an output shaft fitted to the input shaft and capable of relatively moving in the axial direction with respect to the input shaft, an upper column having a cylindrical shape that is disposed on a radially outer side of the input shaft and rotatably supports the input shaft, a lower column having a cylindrical shape that is fitted to the upper column and capable of relatively moving in the axial direction with respect to the upper column, a column bracket that includes a side plate portion located on the side of the upper column and is detachable from a vehicle body, a support member provided on the upper column, and a pin that is provided to extend along the radial direction and penetrate through the side plate portion and the support member.

Abstract: Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.

Abstract: An electric driving device and an electric power steering device. An electric driving device includes a motor and an electronic control unit that controls rotation of the motor. The electronic control unit includes a first circuit board, a second circuit board, a second housing, a lid, and an inter-board connector. The second circuit board includes a control circuit that controls an electric current supplied to a transistor of the first circuit board. The second housing accommodates the second circuit board and has a first through hole passing therethrough in the axial direction. The lid covers the second housing. The inter-board connector connects the second circuit board disposed on the anti-load side of the second housing to the first circuit board disposed on the load side of the second housing. The inter-board connector is disposed in the first through hole.

Abstract: A ball screw device has: a screw shaft rotationally moving during use, a nut having a protruding non-rotating side engaging portion at an end portion on one side in an axial direction, the nut linearly moving during use, balls arranged between a shaft-side and nut-side grooves, and a driving member fixed to the screw shaft having an arc-shaped rotating-side engaging groove portion into which the non-rotating side engaging portion can be inserted in the axial direction, and which can be engaged with the non-rotating side engaging portion in a circumferential direction.

Abstract: A ball bearing includes an inner ring, an outer ring, a plurality of balls rollably disposed between an inner ring raceway surface of the inner ring and the outer ring raceway surface of the outer ring, and a cage in which pockets rollably holding the balls are formed at intervals in a circumferential direction. An inclination angle of a cylindrical surface of each of the pockets is set more than 0° and less than a contact angle of the ball bearing, the cylindrical surface and a corresponding ball are in contact with each other at an inner side in a cage thickness direction relative to a position where a rotation axis of the ball intersects with the cylindrical surface, and a space is formed at a portion from a contact position to a circumferential surface of the cage on a side closer to the intersection position.

Abstract: A reverse-input blocking clutch, comprising a pressed member, an input member, an output member, and an engaging element, the pressed member including a first pressed member element having a pressed surface around an inner peripheral surface thereof and a second pressed member element having a mounting portion fixed to a portion that does not rotate during use, the engaging element configured to transmit rotational torque input to the input member to the output member by moving in a direction away from the pressed surface and to completely block rotational torque reversely input to the output member or transmit a part of the rotational torque reversely input to the output member to the input member and block a remaining part thereof.

Abstract: A steering column has a cylindrical front-side column and a cylindrical rear-side column having a front-end portion that is connected to a rear-end portion of the front-side column. The steering shaft has a front-side shaft rotatably supported inside the front-side column, a rear-side shaft rotatably supported inside the rear-side column and has a rear-end portion to which the steering wheel is attached, and a universal joint connecting the rear-end portion of the front-side shaft and the front-end portion of the rear-side shaft. The front-end portion of the front-side column is always arranged above a portion of the extension line of the center axis of the rear-side column which exists at the same location in the front-rear direction as the front-end portion.

Abstract: A frictional roller reducer having a sun roller; a ring roller; a plurality of intermediate rollers having rolling surfaces coming in rolling contact with the sun roller and the ring roller; the sun roller or the ring roller having a pair of roller elements including inclined surface portions on a circumferential surface coming in rolling with rolling surfaces, the inclined surface portions inclined in directions going toward the intermediate rollers in a radial direction as going away from each other in the axial direction; a pressing device pressing the pair of roller elements in directions going closer to each other, and an elastic member arranged between the pair of roller elements, the elastic member urging the pair of roller elements in directions going away from the rolling surface of the intermediate rollers.

Abstract: In a predetermined first state, a distance (D1) in a second direction between a contact portion (Pin) between a input-side engaging part (9) and an input-side engaging part (17) and a rotation center (O) is larger than a distance (D2) in the second direction between a contact portion (Pout) between an output-side engaging part (12) and an output-side engaged part (14) and the rotation center (O). In a locked state or a semi-locked state, a contact portion (C1) between the output-side engaging part (12) and the output-side engaged part (14) is located closer to the rotation center (O) of the output member (4) in a first direction than an imaginary straight line (L) connecting a contact portion (C2) between one pressing surface (13) of the pair of pressing surfaces (13) and a pressed surface (6) to the rotation center (O) of the output member (4).

Abstract: A motor control device includes temperature detection elements that are mounted on a circuit board on which a first power conversion circuit and a second power conversion circuit are mounted and are arranged at a position between the first power conversion circuit and the second power conversion circuit.

Abstract: This load estimating device for a rolling bearing comprises: a vibration sensor for measuring vibrations of the rolling bearing during rotation; a rotational speed sensor for measuring the rotational speed of the rolling bearing during rotation; a deriving means for deriving a vibration value for a predetermined vibration frequency, using vibration information measured by the vibration sensor; and an estimating means for estimating a load acting on the rolling bearing, said load corresponding to the rotational speed measured by the rotational speed sensor and the vibration value derived by the deriving means, using a table defining a correspondence relationship between the load acting on the rolling bearing, the vibration value for the predetermined vibration frequency, and the rotational speed.

Abstract: A steering device including a steering column supporting a steering shaft to be coupled to a steering wheel. The steering column is sandwiched between a bracket including a first support plate and a second support plate with a tightening shaft penetrating the first support plate and the second support plate and including a male thread at an end of the tightening shaft on a side close to the second support plate having a nut attached thereon. An operation lever is disposed between the nut and the second support plate and penetrated by the tightening shaft. A case including a bottom surface facing an end surface of the tightening shaft is attached to the operation lever, and a coil spring coming into contact with the bottom surface and the tightening shaft.

Abstract: The nut has a first fitting surface provided with a first retaining ring groove on an end portion on the other side in the axial direction; the fitting cylinder, at an end portion on the one side in the axial direction, has a second fitting surface provided with a second retaining ring groove in a portion facing the first retaining ring groove with regard to a radial direction; and the retaining ring is engaged so as to span between the first retaining ring groove and the second retaining ring groove.

Abstract: The present invention provides a grease composition which makes it possible to prevent deterioration in sealing properties even when base oil having a kinetic viscosity of as low as, for example, 5-40 mm2/s is used and which makes it possible to realize both sealing properties and a decrease in torque. The present invention also provides a rolling device. A sealing member (12a) comprises a plurality of sealing lips (114), (115), (116) each of which is made of an elastic material. A grease composition is sealed in void parts (121), (122) that are each located between a sliding surface of a slinger (106), on which the plurality of sealing lips slide, and two adjacent sealing lips. This grease composition contains base oil and a polar polymer. The polar polymer has a weight-average molecular weight of 5,000-140,000.

Abstract: The rolling bearing includes: an outer ring having an outer ring raceway surface on an inner peripheral surface; an inner ring having an inner ring raceway surface on an outer peripheral surface; rolling elements rotatably arranged between the outer ring raceway surface and the inner ring raceway surface; and a seal member that is fixed to a seal attachment groove formed in an axially end portion of the outer ring by a snap ring and seals an axially end portion of a bearing internal space between the outer ring and the inner ring, in which an outer diameter of the seal member is larger than an outer diameter of the snap ring in the seal attachment groove, and in which a radially outer end portion of the seal member is sandwiched between an inner peripheral surface of the seal attachment groove and an outer peripheral surface of the snap ring.

Abstract: A motor control device includes a third harmonic calculation unit configured to calculate a first third harmonic on a basis of an average value between a voltage command value of a maximum phase with a maximum duty ratio and a voltage command value of a minimum phase with a minimum duty ratio among three-phase voltage command values; an amplitude calculation unit configured to calculate an amplitude of the three-phase voltage command values; a third harmonic conversion unit configured to convert the first third harmonic into a second third harmonic on a basis of the first third harmonic and the amplitude; a correction unit configured to correct the three-phase voltage command values by subtracting the second third harmonic from the three-phase voltage command values.