Patent ID: 8118682
Filing Date: 2012-02-21
Classification: C10M,C10N,F16D,Y10S

Abstract:
1. A universal joint comprising: an outer member and an inner member; a torque transmission member such that a rotational torque is transmitted by engagement between said torque transmission member and tracks provided on said outer member and said inner member and such that said torque transmission member rolls along said tracks, thus moving in an axial direction; and a porous solid lubricant that is enclosed on a periphery of said torque transmission member, wherein said porous solid lubricant contains a lubricating component and a resin component as essential components thereof and is a solid matter made porous by foaming and hardening said resin component; wherein said porous solid lubricant is made by foaming and hardening a mixture including said lubricating component and said resin component which is filled on a periphery of said torque transmission member before foaming and hardening of the mixture is completed, wherein said lubricating component consists of lubricating oil, wax or grease and said lubricating component is dispersed in said resin component, and said resin component consists of a resin having rubber-like elasticity or rubber, wherein said porous solid lubricant has properties of exuding said lubricating component owing to deformation thereof caused by an external force; and wherein said universal joint comprises a scattering prevention means for preventing said lubricating component from scattering from said solid matter.