| 摘要 |
PURPOSE:To decrease rear overhang and to improve short turning ability, by a method wherein a traction bracket is tightened against a car body by means of a bolt togetherwith a counterweight, and a bolt loosening protection device is formed at a mounting part. CONSTITUTION:A counterweight 20 is tightened to a car body rearframe 22 by means of a fix bolt 26 togetherwith a traction bracket 24 made of a sheet metal. A difference in level is vertically provided in a through-hole 28 part of the bolt 26 of the traction bracket 24 to form a loosening protection device 40. This constitution, even if a thickness L'1 of a bolt mounting part 20a of the counterweight 20 is the same as that of a conventional type, eliminates a flat washer and a spring washer, permits reduction in a size L'2 raging from the rear end surface of the mounting part 20a to the axis of traction pin insertion holes 32 and 34, and reduction in a size L'4. As a result, rear overhang can be decreased and short turning ability is improved. |
