摘要:
A universal joint includes a bearing including a bearing cup fitted in a bearing hole of a yoke and rolling elements arranged between the bearing cup and a shaft portion of a cross shaft. A method for manufacturing the universal joint includes: simulating a shrunken state in which a sample bearing cup selected from bearing cups in a same lot is fitted in the bearing hole such that only an outside diameter is restrained, by press-fitting the sample bearing cup into a reference hole of a reference jig; measuring a diameter of an inscribed circle inscribed to the rolling elements in the shrunken state; setting an outside diameter of the shaft portion to a required outside diameter according to the diameter of the inscribed circle; and inserting the bearing cup with the rolling elements between the shaft portion having the required outside diameter and the bearing hole.
摘要:
A sealing assembly for a cup bearing of a universal joint includes a seal sub-assembly configured to be positioned in a space between a cup of the cup bearing and a trunnion of the universal joint. The seal sub-assembly includes an elastic sealing member configured to contact an outer surface of the trunnion, and a seal insert attached to the elastic sealing member and configured to contact an inner surface of the cup. The seal insert includes an extension portion configured to contact and extend away from a rim surface of the cup. The sealing assembly further includes an external shield including an inner portion and an outer portion. The inner portion is configured to contact the outer surface of the trunnion, and the outer portion is attached to the extension portion of the seal insert.
摘要:
A cam follower assembly includes a shaft having a body defining a flanged head having an outer bearing surface extending therefrom. An outer ring is positioned around the shaft thereby forming an annular space there between. A plurality of rollers is positioned in the annular space. A channel extends through the shaft and branches radially outward at an outlet to communicate with the annular space. A lubrication assembly is positioned in the shaft and includes a pressurizing device located upstream of a lubrication reservoir and a metering device positioned downstream of the lubrication reservoir. The lubrication reservoir is in fluid communication with the outlet. The lubrication assembly includes a membrane positioned downstream of the lubrication reservoir. A piercing device is positioned proximate the membrane to pierce the membrane and release a lubricant from the lubrication reservoir.
摘要:
An object of the present invention is to provide a chain guide superior in silence, which includes: a guide base extending in a traveling direction of a chain; a plurality of roller shafts attached to the guide base at an interval along the traveling direction of the chain; and rollers each rotatably supported by one of the roller shafts. The roller has a cylindrical outer circumferential surface for guiding the chain. The outer circumferential surface of the roller has a cylindricity not greater than 20 μm.
摘要:
A bearing position for a torque converter, wherein a pump impeller is connected to a converter neck, and the pump impeller is rotatably mounted on the bearing position by at least one roller bearing in a housing, wherein the roller bearing comprises an outer rolling raceway, assigned to the converter neck and facing radially outwards, and an inner rolling raceway, assigned to the housing and facing radially inwards, and rollers disposed radially between the rolling raceways, wherein the bearing position comprises at least one radially elastically designed section of a sleeve of the roller bearing, where the sleeve is provided with the inner rolling raceway, wherein the section, enclosing an elastic convex raceway curvature, is resiliently prestressed in the radial direction against at least a first roller of the rollers, the first roller supported on the outer rolling raceway, and supported in the opposite radial direction on the housing.
摘要:
A bearing arrangement for a camshaft and a camshaft are provided. The bearing arrangement includes a bearing point in a bearing support frame that receives a camshaft, a bearing rolling-element cage and a bearing outer sleeve. The rolling-element cage and the outer sleeve are configured such that the outer diameter of the outer sleeve is smaller than the inside diameter of the bearing point and the outer diameter of the rolling-element cage is smaller than the inner diameter of the outer sleeve. The rolling-element cage may be provided with retention features that axially secure the cage to the outer sleeve. The rolling-element cage and/or the outer sleeve may be provided with collars that axially constrain the bearing relative to the support frame. A camshaft including at least one such bearing arrangement is also provided.
摘要:
A cam follower assembly includes a shaft having a body defining a flanged head having an outer bearing surface extending therefrom. An outer ring is positioned around the shaft thereby forming an annular space there between. A plurality of rollers is positioned in the annular space. A channel extends through the shaft and branches radially outward at an outlet to communicate with the annular space. A lubrication assembly is positioned in the shaft and includes a pressurizing device located upstream of a lubrication reservoir and a metering device positioned downstream of the lubrication reservoir. The lubrication reservoir is in fluid communication with the outlet. The lubrication assembly includes a membrane positioned downstream of the lubrication reservoir. A piercing device is positioned proximate the membrane to pierce the membrane and release a lubricant from the lubrication reservoir.
摘要:
A caged roller bearing includes a plurality of rollers and a roller retaining cage having pockets defined therein at circumferential locations thereof for accommodating the respective rollers therein. A nickel plating layer, which is a plated backing layer, is applied to the entire surface of the roller retaining cage, and an Ni•PTFE plated layer, containing nickel and polytetrafluoroethylene, is applied to the surface of the nickel plating layer.
摘要:
A chain guide is provided which reduces moving resistance of a camshaft-driving, torque-transmitting timing chain. The chain guide includes a guide base (21) provided on one side of the timing chain (5) to face the timing chain and having an opposed pair of side plates (22). The side plates support the respective ends of roller shafts (31) each rotatably supporting a chain-guiding needle roller bearing (41). Each needle roller bearing includes a retainer (43) guided by the needle roller elements (45). With this arrangement, the outer races (42) of the bearings, which guide the movement of the timing chain (5) while kept in rolling contact with the timing chain, encounter less rotational resistance. This in turn reduces moving resistance of the timing chain (5) and thus fuel consumption.
摘要:
An outer ring 6a for a shell-type radial needle bearing having a cylindrical shape with a bottom is achieved for which fatigue life of the bottom plate section 9a and the continuous section between the bottom plate section 9a and the cylindrical section 8a is improved, as well as the anti-corrosion characteristic of the outer ring 6a is improved and the outer ring 6a can be prevented from coming out of the bearing without an increase in cost. After obtaining an intermediate raw material 35 having a cylindrical section and a bottom plate section from a metal raw material, shot peening is performed on the intermediate material 35 to create residual compressive stress in the surface and surface layer section on the outer surface side of the cylindrical section 8a and the bottom plate section 9a such that the residual compressive stress in the surface layer section on the outer surface side is greater than the in the surface layer section on the inner surface side, and from the surface to a depth of 0.03 mm is 700 MPa to 1600 MPa.