Spherical sliding bearing
AssigneeDaido Metal Company Ltd.
InventorsTakayoshi Sasaki, Kotaro Kashiyama
Life of this patent
Estimating the term…
Abstract
A spherical sliding bearing comprising a hollow inner rotating metallic shaft member having a spherical convex surface on its periphery, an outer load-carrying member having a spherical concave surface generally in conformity with the convex surface, the inner rotating shaft member being supported by the outer load-carrying member so as to freely rotate and oscillate under the sliding-contact relationship between the convex and concave surfaces, and a pressure-bearing seat being interposed between the convex and concave surfaces, which contains a fluorocarbon resin, a modifier dispersed in the fluorocarbon resin and a metallic member which is entirely embedded in the fluorocarbon resin and assures the strength of the pressure-bearing seat.
Claims13
A spherical sliding bearing comprising:
- a hollow inner rotating metallic shaft member having a spherical convex surface on its periphery;
- an outer load-carrying member having a spherical concave surface generally in conformity with said spherical convex surface, said hollow inner rotating shaft member being supported by said outer load-carrying member so as to rotate and oscillate under the fitting relationship between the convex and concave surfaces;
- and
- a pressure-bearing seat being interposed between the convex and concave surfaces, which comprises a fluorocarbon resin, a modifier dispersed in said fluorocarbon resin, and a reinforcement metallic member which is not exposed to the sliding-contact surface of the pressure-bearing seat;
- wherein at least the convex surface of said hollow inner rotating shaft member is provided with a Ni-P electroless plating film having a thickness of from 8 to 15 .mu.m and a hardness of from Hv 900 to 1100.
A spherical sliding bearing comprising:
- a hollow inner rotating metallic shaft member having a spherical convex surface on its periphery;
- an outer load-carrying member having a spherical concave surface generally in conformity with said spherical convex surface, said hollow inner rotating shaft member being supported by said outer load-carrying member so as to rotate and oscillate under the fitting relationship between the convex and concave surfaces;
- and
- a pressure-bearing seat being interposed between the convex and concave surfaces, which comprises a fluorocarbon resin, a modifier dispersed in said fluorocarbon resin, and a reinforcement metallic member which is not exposed to the sliding-contact surface of the pressure-bearing seat;
- wherein said fluorocarbon resin is at least one selected from tetrafluoroethylene resin (PTFE), tetrafluoroethylene-perfluoroalkyl-vinyl-ether copolymer resin, tetrafluoroethylene-hexafluoropropylene copolymer resin, and fluoroethylene-propylene ether resin;
- wherein said modifier is at least one material selected from the group consisting of oxybenzoyl-polyester, polyphenylene sulfide, a thermosetting resin, a metal lubricant, metal oxide, metal sulfide, metal fluoride, a carbonic solid lubricant, and ceramics;
- wherein said modifier is dispersed in the fluorocarbon resin in the form of .grains or fibers;
- wherein said reinforcing metallic member comprises a net completely embedded in the fluorocarbon resin containing the modifier so that the fluorocarbon resin entirely covers said net and fills meshes of said net;
- and
- wherein at least the convex surface of said hollow inner rotating shaft member is provided with a Ni-P electroless plating film having a hardness of from Hv 900 to 1100.
Dependencies are inferred from the claim text.