| 摘要 |
PURPOSE:To prevent the decrease of strength of a strut further easily perform assembly and disassembly of an exhaust pipe, by forming the strut supporting a seat supporting frame to a plate shape crossing a car body. CONSTITUTION:A frame 1 is equipped with a main mast 3 extended diagonally rear downward from a steering shaft pipe 2 and a pair of left and right bottom located pipes 4 once extended downward thereafter curved to the rear. The first reinforcer frame 23 is connected between a curved part 49 of the pipe 4 and the mast 3, and the left and right pipes 4 are mutually connected and reinforced by the second reinforcer frame 24 immediately above curved parts 4a, then a powder unit 25 comprising an engine and a speed changer is mounted between these pipes. A strut 9 is formed to a box shape by doubly welding two sheets of aluminum alloy plate materials 9a, 9b and welded respectively to left and right seat supporting frames 7 in the upper part and to a bracket 5 in the bottom part. An exhaust pipe 28 is extended through a through hole 34 provided to both sides of the strut 9. |
