| 摘要 |
<p>The assembly (10) protects a track chain (28) from damage when some foreign object, such as a rock, is trapped between the chain link assembly (28) and a chain supporting element (24). An idler link (30) is pivotally connected to a track frame (12) and a recoilable rear idler (24) is rotatably positioned on an idler hub (54) itself pivotally connected to the idler link (30). An increase in tension on the endless chain link assembly (28) causes the idler hub (54) to rotate away from the endless chain link assembly (28) decreasing track path length and, consequently, tension. This rotation is resiliently resisted by a recoil pad (66) mounted between the idler hub (54) and the idler link (30). An adjustable tensile link (68) prevents any recoil up to a preselected endless chain link assembly (28) tension.</p> |
