| 摘要 |
A crumber for a trencher machine is provided, the crumber including a crumber mount for mounting to a crumber boom, and a crumber arm, the crumber arm being mounted to the crumber mount by a linkage, the linkage having a first linkage arm and a second linkage arm, the linkage being arranged to allow rotation of at least one of the linkage arms of at least 75°. The crumber mount has at least one edge or surface of the crumber arm, wherein the least one edge or surface of the crumber mount and the complementary edge or surface of the crumber arm abut on each other when the crumber arm is in a lowermost position. In this manner, the crumber arm is supported along an extended length when in the lowermost position. |
