| 摘要 |
PROBLEM TO BE SOLVED: To reduce mud and snow accumulated at an attaching part of a truck frame in a tractor comprising a semi-crawler device so as to reduce frequency of operations for removal of accumulation. ! SOLUTION: In a semi-crawler device for a tractor, a crawler 19 is wound on a driving sprocket 14, a front tension wheel 17, a plurality of idle wheels 16, and a rear driven wheel 18. A truck supporting bracket supporting a crawler frame 15 journaling the plurality of idle wheels 16 is journaled with a rear axle case. The truck supporting bracket is constructed with a cast member having an integral construction consisting of a journaling part 22b, an attaching part 22a of a crawler frame 15 and legs 22c and 22d branching from the journaling part 22b to the attaching part 22a in a longitudinal direction. ! COPYRIGHT: (C)2015,JPO&INPIT |
