| 摘要 |
PURPOSE:To enable the starting of an engine through a trhust engagement, by providing a countershaft for transmitting motive power from a hydraulic clutch shaft to an auxiliary transmission, in such a manner that the countershaft is separated from another countershaft in a hinder stage, and by providing a one-way clutch between both the countershafts. CONSTITUTION:A transmission unit comprises a hydraulic-clutch-type transmission, in which plural hydraulic clutches provided at one of two parallel shafts are selectively engaged to change a speed, and an auxiliary transmission for changing the speed of the rotation already changed by the former transmission. A hydraulic pump and a one-way clutch 34 are provided between the main speed changing countershaft 25 of the hydraulic-clutch-type transmission and the auxiliary speed changing countershaft 35 of the auxiliary transmission. A stop groove 25a is provided on the rear end of the shaft 25. The engaging projection 5a of a pump shaft 5 is fitted in the groove 25. A pump case 33 containing a gear pump is provided around the pump shaft 5. In the one-way clutch 34, engaging members 34c constricted in the middle are provided between an outer and an inner races 34a, 34b. |
