| 摘要 |
PURPOSE:To make it possible to change over a front gear into plural driving conditions with the shift of a hub by setting a hub to the braking-side boss of a differential case in a differential mechanism for acceleration installed in a transmission system to a front wheel differential mechanism and providing a locking device in the braking-side boss. CONSTITUTION:A farm tractor is provided with differential mechanisms respectively at its front and rear driving parts and a differential mechanism for acceleration is installed in a transmission system to a front wheel differential mechanism. In this constitution, a braking-side boss 8b in the differential case 8 of the differential mechanism for acceleration is extended rearward and supported by a brake case 29 through a bearing 10. The boss 8b is also set with a hub 26 and the hub 26 is slid between the differential case 8 and the bearing 10 through a fork 37. Then, a ball 25 inlaid in the hole 24 of the boss 8 is locked or unlocked in a conical hole bored in a braking shaft 22 to constitute a locking device. And the front wheel becomes possible to change over to non-drive, drive, non-drive and double speed drive with the slide of a hub 26.
|
