| 摘要 |
PURPOSE:To aim at simplifying structure by constructing the title structure in such a way as to stop a machine body and a working device when a continuously variable transmission is forcibly operated into a neutral stop position by means of an artificial operating tool and return the speed change part automatically into a position corresponding to the speed change operating tool by return operation. CONSTITUTION:An artificial operating tool 29 is operated (stepped in) in the state of a speed change operating tool 19 being optionally fixed by a lock mechanism 28 so as to shift a continuously variable transmission 14 forcibly to a neutral stop position N by a servo mechanism 23 through a flexible mechanism 25, a machine body stops as well as a working device such as a seedling planting device and the like connected to the lower side of the continuously variable transmission 4 stops so as to enable work such as seedling supply and the like. When the artificial operating tool 29 is return operated, the speed changed part of the continuously variable transmission 14 is also automatically shifted into a position corresponding to the fixed speed change operating tool 19 by the restoring action of the flexible device 25, the machine body restarts, and the working device is reoperated. A main clutch as a separate body thus becomes unnecessary, so that the structure is simplified as well as the improvement of work efficiency can be promoted. |
