ROLLER DEVICE FOR TRACK-TYPE WORK VEHICLE, ROLLER SHELL UNIT AND ROLLER SHELL

摘要

A roller device includes a shaft, a bushing, a roller shell, a retainer, and an elastic member. The shaft has a rotation axis. The bushing has smaller-diameter parts on both ends and a larger-diameter part arranged between the smaller-diameter parts with stepped portions interposed therebetween, and is fitted over the outer circumference of the shaft to be rotatable relative to the shaft around the rotation axis. The roller shell has a cylindrical shape, and is fitted over the outer circumference of the smaller-diameter parts of the bushing to abut on the stepped portions. The retainer is formed annularly, is fixed detachably to an end face of the bushing, and abuts on the end face of the roller shell with the elastic member interposed therebetween.

主权项

1. A roller device for a track-type work vehicle, comprising:
a shaft having a rotation axis; a bushing having smaller-diameter parts on both ends and a larger-diameter part arranged between said smaller-diameter parts with stepped portions interposed therebetween, said bushing being fitted over an outer circumference of said shaft to be rotatable relative to said shaft around said rotation axis; a roller shell having a cylindrical shape and being fitted over the outer circumference of said smaller-diameter parts of said bushing to abut on said stepped portions; an elastic member; and a retainer being formed annularly, being fixed detachably to an end face of said bushing, and abutting on an end face of said roller shell with said elastic member interposed therebetween.