ROLLER DEVICE FOR TRACK-TYPE WORK VEHICLE

摘要

A roller device includes a shaft, a bushing, a roller shell, a retainer, and a seal. The roller shell is fitted over the outer circumference of the bushing. The retainer is fixed detachably to an end of the bushing, and fitted in an end of the roller shell on a radially outer side. The seal is disposed on the outer circumference of the shaft so as to seal a gap between the shaft and the bushing. The seal includes a first seal member attached to the bushing and a second seal member attached to the shaft. The first seal member is rotatable relative to the second seal member. The second seal member has an outer circumferential end disposed on an inner side with respect to an inner circumferential end of the retainer.

主权项

1. A roller device for a track-type work vehicle, comprising:
a shaft having a rotation axis; a bushing 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 bushing; a retainer being formed annularly, being fixed detachably to an end of said bushing, and being fitted in an end of said roller shell on a radially outer side; and a seal disposed on the outer circumference of said shaft so as to seal a gap between said shaft and said bushing, said seal including a first seal member attached to said bushing and a second seal member attached to said shaft, said first seal member being rotatable relative to said second seal member, said second seal member having an outer circumferential end disposed on an inner side with respect to an inner circumferential end of said retainer, wherein said retainer abuts on an end face of said first seal member in the direction of said rotation axis of said shaft.