| 摘要 |
PURPOSE:To improve safety during running at a high speed by mounting cylinders for steering on front and rear drag arms and providing a control part to effect switching to a front wheel steering mode when it is detected that a shift lever is located in a high speed running position. CONSTITUTION:Final cases 3 are mounted on the right and lefts of a front shaft 2 of a riding managing machine 1 to transmit a drive force to both sides of a front axle 4. The one end part of a drag link 6 having the other end part coupled to a drag arm 7 positioned to a central part is coupled to a knuckle arm 5 protruded to a final case 3. A steering mechanism for a rear axle 12 is formed in a similar manner described above, front and rear wheels are independently steered through operation of cylinders 9 and 19 for steering coupled to drag arms 7 and 17. In this case, a sensor 31 for detecting a shift position is mounted on a shift lever, and control is executed such that, when it is detected by the sensor 31 that the shift lever is located in a high speed running position, a front wheel steering mode is selected. |
