| 摘要 |
PURPOSE:To simplify construction and make units compact by supporting right and left driving wheels with the casing of a power unit and connecting the casing freely swingably to a body frame through a pivot while installing suspension springs between them. CONSTITUTION:The casing 70 of a power unit P is constructed in a rigid body, with a crankcase 50 being bonded in an integrated form with a pair of transmission cases 71, 71' placed on both right and left ends of the crankcase 50. An axle 67, which is fixed to the hub 66 of a driving wheel Wf, is supported by the transmission case 71. The casing 70 is divided into a plural number of blocks, from a first to a sixth blocks 701 to 706, with neighboring blocks being bolted with each other. On supporting brackets 74 to 77 which are formed on the blocks, is mounted a pivot 83, which is also supported by the right and left supporting plates 1a, 1a' of a body frame F through a pair of right and left suspension spring deviced Sf, Sf'. Thereby the casing 70 is freely swingably connected to the frame F. |
