Patent ID: 8991944
Filing Date: 2015-03-31
Classification: B62D

Abstract:
1. A crawler bushing assembly having a seal contact end face to be in contact with a seal member disposed axially adjacent to the crawler bushing assembly, wherein the crawler bushing assembly includes: a crawler bushing body having a large-diameter cylindrical part defining an axially intermediate section of the crawler bushing body and a small-diameter cylindrical part having a smaller diameter than that of the large-diameter cylindrical part and defining an axially end section of the crawler bushing body; an elastic ring mounted to an outer periphery of the small-diameter cylindrical part; a seal ring attached to the small-diameter cylindrical part through the elastic ring, the seal ring being formed with the seal contact end face at an outer end thereof; first locking means for preventing the elastic ring from moving outward along an axis on the small-diameter cylindrical part; second locking means for preventing the seal ring from moving outward along the axis on the small-diameter cylindrical part, the second locking means being formed by providing a circumferentially extending groove in an inner end surface of the seal ring, wherein the second locking means comprises a tongue-shaped projection that is radially inward of the groove and projects radially inward to be locked by the elastic ring, and a tapered surface connected with the tongue-shaped projection, the tapered surface narrowing radially inward while extending axially inward on an inner periphery of the seal ring.