Abstract: A double row bearing device includes an outer ring, a first inner ring body, a second inner ring body, and a protrusion. The first inner ring body is provided on an outer circumferential surface of a tube portion and is rotatable as a unit with the tube portion. The second inner ring body fits on the outer circumferential surface of the tube portion and is located to provide an axial clearance between the first and the second inner ring body. The protrusion includes at least one of a first portion and a second portion. The first portion protrudes toward the second inner ring body from a first end face of the first inner ring body facing the second inner ring body. The second portion protrudes toward the first inner ring body from a second end face of the second inner ring body facing the first inner ring body.

Abstract: A steering system includes: a rack shaft movable in the axial direction; a cylindrical nut member made of metal and threadedly engaged with a spiral screw groove formed in the outer peripheral surface of the rack shaft via a plurality of balls; a pulley made of a resin and externally fitted with the nut member so as not to be rotatable relative to the nut member; a belt wound around the pulley; an electric motor that rotates the pulley and the nut member via the belt; and a retention ring, a plate spring portion of which is disposed between the outer peripheral surface of the nut member and the inner peripheral surface of the pulley in an elastically deformed state. The retention ring presses a second planar portion formed on the inner peripheral surface of the pulley radially outward using a restoring force of the plate spring portion.

Abstract: A rack housing includes first and second rack housing members aligned in the axial direction of the rack shaft and coupled to each other in the vicinity of a speed reducer. A speed reducer casing is provided in its outer wall with a through hole. A belt tension adjusting mechanism includes: an adjusting shaft rotatably attached to the speed reducer casing; an eccentric shaft attached to the outer periphery of the adjusting shaft so as to be rotatable together with the adjusting shaft; two bearings disposed on the outer periphery of the eccentric shaft and axially away from each other; and a tension pulley rotatably attached to the outer periphery of the eccentric shaft via the bearings. A first end of the adjusting shaft is exposed to the outside of the speed reducer casing through the through hole.

Abstract: A sliding member includes: a lining layer formed from an alloy having a predetermined shape; and an overlay layer formed on an inner circumferential surface of the lining layer, the overlay layer being formed of a resin, the overlay layer sliding with a shaft, the overlay layer including a raised portion a height of which in a predetermined area including each of an edge in an axial direction of the shaft is greater than a height of another area of the overlay layer.

Abstract: A steering system includes a motor, a rack shaft, and a nut that is screw-thread on the rack shaft via a plurality of balls. The steering system further includes a reduction mechanism having a driving pulley, a driven pulley, a belt, and an idler pulley that applies tension to the belt. The steering system further includes a housing that houses the motor, the rack shaft, the nut, and the reduction mechanism. Compressive rigidity in an axial direction is set to vary between a near-end area and a far-end area of the housing. The idler pulley is provided so as to contact a portion of the belt which is loosened when end contact occurs at an axial end of the housing where the compressive rigidity is set to a larger value.

Abstract: Bearing 13 has lining layer 17 that is formed of an alloy having a predetermined shape and that has chamfered portion 25, and overlay layer 19 that is formed of a resin on an inner circumferential surface of lining layer 17, the inner circumferential surface sliding relative to a mating shaft, and that covers at least a portion of chamfered portion 25.

Abstract: A rack housing includes first and second rack housing members aligned in the axial direction of the rack shaft and coupled to each other in the vicinity of a speed reducer. A speed reducer casing is provided in its outer wall with a through hole. A belt tension adjusting mechanism includes: an adjusting shaft rotatably attached to the speed reducer casing; an eccentric shaft attached to the outer periphery of the adjusting shaft so as to be rotatable together with the adjusting shaft; two bearings disposed on the outer periphery of the eccentric shaft and axially away from each other; and a tension pulley rotatably attached to the outer periphery of the eccentric shaft via the bearings. A first end of the adjusting shaft is exposed to the outside of the speed reducer casing through the through hole.

Abstract: In a method, in which a plain bearing alloy layer is bonded to a surface of a backing steel sheet, and, a Bi-based overlay layer is then deposited on the plain bearing alloy layer by electroplating, replacement of Bi with the backing steel sheet and deposition of Bi on the backing steel sheet are prevented. Prior to the step of electroplating of the Bi-based overlay layer, the following metals and the like are formed on at least the back surface of the backing steel sheet. An electrochemically more noble metal than Bi, an electrochemically more base metal than Bi and capable of forming a passivation state, or resin.

Abstract: In a method, in which a plain bearing alloy layer is bonded to a surface of a backing steel sheet, and, a Bi-based overlay layer is then deposited on the plain bearing alloy layer by electroplating, replacement of Bi with the backing steel sheet and deposition of Bi on the backing steel sheet are prevented. Prior to the step of electroplating of the Bi-based overlay layer, the following metals and the like are formed on at least the back surface of the backing steel sheet. An electrochemically more noble metal than Bi, an electrochemically more base metal than Bi and capable of forming a passivation state, or resin.

Abstract: Seizure resistance and wear resistance of Cu—Bi—In copper-alloy sliding material are enhanced by forming a soft phase of as pure as possible Bi. Mixed powder of Cu—In cuprous alloy powder and Cu—Bi containing Cu-based alloy powder is used. A sintering condition is set such that Bi moves outside particles of said Cu—Bi containing Cu-based powder and forms a Bi grain-boundary phase free of In, and In diffuses from said Cu—In containing Cu-based powder to said Cu—Bi containing Cu-based powder.

Abstract: An object of the present invention is to provide a sliding member suitable to a soft mating member low in hardness. The present invention relates to a sliding member for sliding with a mating member having a ferrite phase at least on a surface thereof, the sliding member including a coating layer containing a binder resin, molybdenum disulfide, and hard substance particles.

Abstract: Bearing 13 has lining layer 17 that is formed of an alloy having a predetermined shape and that has chamfered portion 25, and overlay layer 19 that is formed of a resin on an inner circumferential surface of lining layer 17, the inner circumferential surface sliding relative to a mating shaft, and that covers at least a portion of chamfered portion 25.

Abstract: With regard to an Al—Cr—Zr based alloy having annealing temper, a high temperature strength at 180 to 200 degrees C. is ensured. An aluminum alloy for a plain bearing having improved fatigue resistance is to be provided. An aluminum alloy for a plain bearing solving the problems has a composition of 3 to 7 mass % Mg, 0.1 to 0.3 mass % Cr, and 0.1 to 0.3 mass % Zr, with the balance being Al and inevitable impurities. A principal structure of the aluminum alloy consist of an Al matrix containing solute Mg, minute particles of Cr, and Zr.

Abstract: A sliding member includes: a lining layer formed from an alloy having a predetermined shape; and an overlay layer formed on an inner circumferential surface of the lining layer, the overlay layer being formed of a resin, the overlay layer sliding with a shaft, the overlay layer including a raised portion a height of which in a predetermined area including each of an edge in an axial direction of the shaft is greater than a height of another area of the overlay layer.

Abstract: An object of the present invention is to provide a sliding member capable of rapidly wrapping a mating member, and reducing the surface roughness of the mating member after wrapping. The present invention relates to a sliding member for sliding with a mating member subjected to hardening treatment, the sliding member including a coating layer containing a binder resin, molybdenum disulfide, and hard substance particles in massive form.

Abstract: An object of the present invention is to provide a sliding member capable of rapidly wrapping a mating member, and reducing the surface roughness of the mating member after wrapping. The present invention relates to a sliding member for sliding with a mating member subjected to hardening treatment, the sliding member including a coating layer containing a binder resin, molybdenum disulfide, and hard substance particles in massive form.

Abstract: Seizure resistance and wear resistance of Cu—Bi—In copper-alloy sliding material are enhanced by forming a soft phase of as pure as possible Bi. Mixed powder of Cu—In cuprous alloy powder and Cu—Bi containing Cu-based alloy powder is used. A sintering condition is set such that Bi moves outside particles of said Cu—Bi containing Cu-based powder and forms a Bi grain-boundary phase free of In, and In diffuses from said Cu—In containing Cu-based powder to said Cu—Bi containing Cu-based powder.

Abstract: According to the manufacturing method of a bearing which is a sliding member, a bimetal sintered alloy is formed by sintering a metal powder on a surface of a back metal which is a plate shaped metal member to form a sintered layer. In addition, following this, the sintered alloy is molded as a cylindrical bush and the bush undergoes a heat treatment. Following this, the bearing is formed by press-fitting the bush into a collar which is a cylindrical metal member.

Abstract: An object of the present invention is to provide a sliding member suitable to a soft mating member low in hardness. The present invention relates to a sliding member for sliding with a mating member having a ferrite phase at least on a surface thereof, the sliding member including a coating layer containing a binder resin, molybdenum disulfide, and hard substance particles.

Abstract: An object of the present invention is to provide a sliding member capable of rapidly wrapping a mating member, and reducing the surface roughness of the mating member after wrapping. The present invention relates to a sliding member for sliding with a mating member subjected to hardening treatment, the sliding member including a coating layer containing a binder resin, molybdenum disulfide, and hard substance particles in massive form.