| 摘要 |
PROBLEM TO BE SOLVED: To considerably enhance whole rigidity and improve reliability by mounting a trunnion bracket on a web of a frame, eliminating the necessity of punching a hole for a fastening member in the flange and adopting a closed cross section structure.SOLUTION: A trunnion bracket 4 in which a trunnion shaft 3 is disposed so as to be bridged between boss parts 4a is mounted on lower surfaces at both width ends of a cross member 10 connecting between frames 5. A trunnion plate 17 is mounted to connect the outside surface and an outside surface of a web 5a of the frame 5. A first closed cross section structure D1 constructed by the cross member 10, the frame 5, the trunnion plate 17, the trunnion bracket 4 and the trunnion shaft 3 is formed in a vehicle width direction of the cross member 10. A second closed cross section structure D2 constructed by an end of the cross member 10, the frame 5, the trunnion plate 17 and the trunnion bracket 4 is formed at both ends of the vehicle width direction of the cross member 10. |
