Travel driving apparatus for a track-type vehicle

摘要

A travel driving apparatus for a track-type earthmoving machine is provided which can reduce abrasion wear of a sprocket and a bushing and which enables easy replacement of worn members. A contact member is detachably mounted to an opposing surface of a track shoe to a sprocket, and a tooth top portion of the sprocket is brought into contact with the contact member, thereby securing a gap between a bushing of a track chain and a tooth bottom portion of the sprocket. The tooth top portion of the sprocket and a surface portion of the contact member have surface portions which are brought into contact with each other at a time when the sprocket rotates.