| 摘要 |
PURPOSE:To dispense with an exclusive shaft for supporting a shift gear as well as to aim at reduction in the number of parts item and so on, by supporting the shift gear of the front-wheel gear shifter installed interposingly in power transmission systems for front wheels idly on a power takeoff shaft for a farm working machine. CONSTITUTION:In a transmission case 3, there is provided with a front-wheel gear shifter A which increase each peripheral speed of front wheels only at the time of turning. And, this front-wheel gear shifter A is set up between a output shaft 36 transmitting power to these front wheels and a power takeoff shaft 18 for a far working machine. In this case, in the front-wheel gear shifter A, there is provided with a shift gear 37 as being idly supported on the power takeoff shaft 18. And, in this shift gear 37, there are provided with a first member 38, transmitting power for a travel system, a second member 39, where power out of the shift gear 37 is transmitted, and a third member 40 transmitting power out of either side of these first and second members 38 and 39, respectively. And, for example, at the time of turning, the third member 40 is connected to the second member 39.
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