| 摘要 |
PURPOSE:To make a device small-size and simple, by providing a hydraulic speed changing part and a gear speed changing part in upper and lower positions of a mission case and by making widths of both speed changing parts equal to each other approximately. CONSTITUTION:The hydraulic speed changing part A changes the speed of the input of an input shaft 1 to forward movement, neutral, and backward movement selectively in a supporting shaft 7 and transfers it, and the supporting shaft 7 is provided with the hydraulic clutch device AF for forward movement and the hydraulic clutch device AR for backward movement, and oil is charged into oil grooves 13 and 13' in the end part of the supporting shaft 7 to operate devices AF and AR hydraulically. A gear speed changing part B changes speeds of the supporting shaft 7, which is the output shaft of a speed changing part A, and an output shaft 4 in the transfer lower level in multistages by the moving operation of a shifter fork 17. The speed changing parts A and B are provided in upper and lower positions in a mission case M, and widths of both speed changing parts are made equal to each other approximately, thereby making the whole of the device small-size, simple and compact. |
