| 摘要 |
Alternate embodiments of mountings are shown which include ball and ball socket segments arranged to permit universal pivoting movement between the track frame and crossbar of a crawler tractor. The arrangement further includes planar surfaces carried by the track frame or crossbar engaged with planar surfaces formed on one or the other of the ball and ball socket segments so that the end of the crossbar is permitted to slide fore-and-aft and sideways relative to the track frame. |
