Abstract: A manufacturing method of a rolling bearing ring comprising: a step of obtaining a base member; a step of forming, by laser cladding, a cladded layer made of a metal material having a higher hardness than the base member on one surface of the body member; a step of forming a rolling element guide surface by finishing a surface of the cladded layer; and a step of forming, by laser hardening, a hardened layer over the entire circumference of a surface layer portion of at least a part of the base member that is separated from the cladded layer.

Abstract: A reverse-input blocking clutch includes a housing, an input shaft, an output shaft, a pair of engaging elements, a first bearing mechanism provided between the input shaft and the housing, and a second bearing mechanism provided between the output shaft and the housing. At least one of the input shaft, the output shaft, and the housing has a raceway surface which contacts at least one rolling element of the first bearing mechanism and the second bearing mechanism.

Abstract: A roller bearing includes an outer ring, an inner ring, and plural rolling elements rollably interposed between mutual raceway surfaces of the outer and inner rings, and is used by fitting an outer diameter surface of the outer ring serving as a fitting surface to a housing serving as a mating member or by fitting an inner diameter surface of the inner ring serving as a fitting surface to a shaft serving as the mating member. The fitting surface is provided with at least one protrusion so that a static torque Thold=?(F×r) generated by the protrusion is equal to or greater than a torque Tcreep generated by creep.

Abstract: A method for producing a composite material molded article includes a process of, from a solution in which reinforcing fibers with an average fiber length of 0.5 mm or more and thermosetting resin are dispersed and mixed in a solvent, removing the solvent by paper-making to form a preform, and a process of press molding the obtained preform using a mold set at a temperature equal to or higher than a curing temperature of the thermosetting resin to form the composite material molded article.

Abstract: Provided is a sliding member in which a first member having a low hardness and a second member having a high hardness slide against each other via a lubricant. The sliding member has an optimized profile relationship between large waviness and fine roughness applied to the first member, improved retention and wettability of the lubricant, and increased seizure resistance. In the sliding member in which the first member and the second member having a higher hardness than the first member slide against each other via a lubricant, an isotropic texture in which a valley area is 1000 ?m2/mm or more and 20000 ?m2/mm or less and RLo (?c: 0.08 mm) is 1% or more and 12% or less is applied to a part of the first member which is in contact with the second member.

Abstract: A reverse-input blocking clutch includes a leaf spring having: two held portions that is arranged on both sides of an input-side engaging portion of an input member with respect to a second direction perpendicular to a first direction which is a direction of movement of a pressing surface of an engaging element moving away from or toward a pressed surface of a pressed member and a center axis of the input member, and elastically held between the input-side engaging portion and an input-side engaged portion of the engaging member; and a base portion that connects the two held portions.

Abstract: A method for manufacturing a worm wheel including an inner wheel element including a side plate portion and a tubular eave portion, and an outer wheel element including a wheel tooth portion on an outer circumferential surface thereof, and coupled and fixed to the inner wheel element in a manner of covering a radially outer portion of the side plate portion and the eave portion, the method includes: molding the outer wheel element by disposing a mold around a radially outer portion of the inner wheel element, and feeding the molten synthetic resin from an annular or arc-shaped injection gate toward a pocket portion that is continuous over an entire circumference of a cavity present between an inner surface of the mold and a surface of the inner wheel element and that is present on a radially inner side of the eave portion.

Abstract: A method for diagnosing a rolling device including a rolling element and a peripheral member of the rolling element, the method including: applying an AC voltage to an electric circuit including the rolling element and the peripheral member; measuring an impedance and a phase angle when the AC voltage is applied; correcting the measured impedance and the measured phase angle using a correction formula based on a solution of Kirchhoff's law defined corresponding to a resistance and a reactance by a wiring component in the electric circuit; and calculating a lubricating film thickness and a metal contact ratio based on the corrected impedance and the corrected phase angle.

Abstract: An outer diameter of a claw portion is smaller than an outer diameter of a main portion, a radial width of the claw portion is ½ or less of a radial width of the main portion, an axial width from an upper surface of a connection portion of a pillar portion to a bottom surface of the main portion is ½ or less of an axial width of a crown type cage for a ball bearing, and in the main portion, an opening portion is provided between adjacent pockets.

Abstract: A ball screw device having a screw shaft, a nut, a plurality of balls, a carrier constituting a planetary reduction mechanism, a rolling bearing for rotatably supporting the carrier, where the screw shaft includes a screw portion having a spiral-shaped shaft-side ball screw groove on an outer circumferential surface thereof, and a fitting shaft portion, the carrier is fixed to the fitting shaft portion such that relative rotation is not possible, an inner ring raceway of the rolling bearing is formed directly on an outer circumferential surface of the carrier.

Abstract: An application position of a processing force directed radially outward is continuously changed in the circumferential direction of a cylindrical portion (25) while applying the processing force to a part of the cylindrical portion (25) of a hub main body (21) in the circumferential direction. An application position of a processing force directed radially inward is continuously changed in the circumferential direction of a staking portion intermediary body (41) while applying the processing force to a part of the staking portion intermediary body (41) in the circumferential direction.

Abstract: A wireless power reception system 1 includes: a power reception device 5 including a power reception coil 51 that receives power supplied wirelessly from a power transmission coil 41 of a power transmission device 4 installed in a road surface, at least a portion of the power reception coil 51 being housed in a wheel 3 of a moving body 2; and an onboard device 6 which is installed in the moving body 2 and which is electrically connected to the power reception device 5, wherein the power reception device 5 can transmit received power to the onboard device 6, and the power reception coil 51 has a convex shape pointing downward in a side view as seen from an axial direction of the wheel 3.

Abstract: A nut of the present disclosure includes a cylindrical nut main body penetrated by a screw shaft, a plurality of inner peripheral raceway surfaces and a plurality of S-shaped groove surfaces recessed to an outer side in a radial direction from an inner peripheral surface of the nut main body, and a flange protruding to the outer side in the radial direction from an outer peripheral surface of the nut main body. The flange includes at least one or more partial flanges extending only in a part of a circumferential direction along the outer peripheral surface of the nut main body.

Abstract: An object is to provide an evaluation method for detecting the amount of hydrogen supposed to influence white structure flaking in a simple manner in a short period of time and evaluating possibility of white structure flaking from the detected hydrogen amount. The provided is a possibility evaluation method of white structure flaking that, by measuring an amount of hydrogen gas generated under a condition simulating a use condition of a rolling device used in industrial equipment and existing in an atmosphere, evaluates possibility of white structure flaking in the rolling device.

Abstract: A linear motion device includes a linear motion body that is fitted onto a screw shaft and moves straight along the screw shaft, a large number of balls held in a ball groove formed on an inner surface side of the linear motion body and rolling between the ball groove and the screw shaft, a separator interposed between each ball, a circulation passage formed in the linear motion body and circulating the ball from one end side of the ball groove to the other end side, where at least one of the separator and the circulation passage is formed from polyamide 410 by injection molding.

Abstract: An angular ball bearing includes an outer ring having an outer ring raceway surface, an inner ring having an inner ring raceway surface, and a plurality of balls being rollable between the outer ring raceway surface and the inner ring raceway surface at a contact angle, a bearing ring of at least one of the outer ring and the inner ring being a press-formed product of a steel plate. The bearing ring includes an extending portion extending in an axial direction from the raceway surface toward a side opposite to a side on which a line of action of the contact angle relative to a center of the ball passes through the raceway surface. The extending portion has a bent portion bent in a radial direction and the bent portion overlaps the ball when viewed from the axial direction so as to define an overlap allowance.

Abstract: A grease composition includes: (A) a trimellitic acid ester, (B1) a phenyl ? naphthylamine, (B2) an alkyl diphenylamine, (C1) a succinic acid half ester, (C2) a sorbitan monoester, and (D) a urea-based thickener. This grease composition is excellent in anti-flaking, rust prevention, and oxidation resistance properties, and furthermore, a fatigue life of a rolling device and the like in which the grease is enclosed can be maintained for a long time.

Abstract: A wireless power transfer system 1 includes a power transmission device 2 and a power reception device 3. The power transmission device 2 is a power transmission device 2 installed in a road 4, is provided with a power transmission coil 21 that transmits power wirelessly, and is configured such that when installed in the road 4, the normal line of a coil plane of the power transmission coil 21 is inclined with respect to the normal line of the road surface of the road 4 in a lateral cross section of the road 4. The power reception device 3 is provided with a power reception coil 31 that receives power wirelessly, and at least a portion of the power reception coil 31 is housed in the wheel 6 of the moving body 5.

Abstract: Provided are a friction engagement device connected by pressing a friction plate and a separate plate against each other and disconnected by releasing the force pressing them; a rotation transmission state switching device having at least a free mode in which rotation of a first member relative to a second member is allowed and a lock mode in which rotation of the first member relative to the second member is prevented; and a control device having a function to switch the rotation transmission state switching device to a lock mode while maintaining the friction engagement device in a connected state and a function to switch to a state where the friction engagement device is disconnected and the rotation transmission state switching device is in a free mode.

Abstract: A fitting shaft portion has an inner-diameter side engaging portion on an outer peripheral surface with external teeth arranged in a circumferential direction; a fitting member has an outer-diameter side engaging portion on an inner peripheral surface with internal teeth arranged in the circumferential direction and engaging with the inner-diameter side engaging portion; an engaging portion between the inner-diameter side engaging portion and the outer-diameter side engaging portion includes a portion having interference in the radial direction in a portion in the axial direction; and the fitting shaft portion has a crimped portion at an end portion on one side in the axial direction that engages in the axial direction with the fitting member.