| 摘要 |
PROBLEM TO BE SOLVED: To provide a travelling drive unit of a track-laying-type vehicle with increased durability in a sprocket and the bush of a crawler and improved easiness of replacement of an abrasion member and the driving force transmission function of the sprocket. SOLUTION: In the travelling drive unit of the track-laying-type vehicle, gear thickness is set slightly smaller than the circular arc length between bushes 5, 5 of the crawler 3 meshing with a gear section 21 in the sprocket 20, and a groove 22 force earth movement is provided in a centripetal direction on the side of the gear section 21. COPYRIGHT: (C)2004,JPO
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