To increase a reduction gear ratio in the entire creep transmission while suppressing increase in size of a transmission case, in a transmission device for travel of a tractor in which a creep transmission device is housed in the transmission case.SOLUTION: A creep transmission device 60 is provided with a first transmission gear 66 disposed on an output shaft gear 54b of a gear transmission 40, a first reduction gear 62 relatively rotatably supported by a relay shaft 61 in a state of being engaged with the first transmission gear 66, a second transmission gear 67 disposed on the first reduction gear 62, a second reduction gear 63 relatively rotatably supported by an output shaft 43 of the gear transmission 40 in a state of being engaged with the second transmission gear 67, a third transmission gear 68 disposed on the second reduction gear 63, a third reduction gear 64 not relatively rotatably supported by the relay shaft 61 in a state of being engaged with the third transmission gear 68, and a reduction gear pair 65 disposed over the relay shaft 61 and the output shaft 43 to decelerate power of the relay shaft 61 to transmit the same to the output shaft 43.SELECTED DRAWING: Figure 4

    【課題】クリープ変速装置がミッションケースに収容されているトラクタの走行用伝動装置において、ミッションケースの大型化を抑制しつつクリープ変速全体の減速比を高くできるようにする。【解決手段】クリープ変速装置60に、ギヤトランスミッション40の出力軸ギヤ54bに設けられた第1伝動ギヤ66、第1伝動ギヤ66に咬み合った状態で中継軸61に相対回転可能に支持された第1減速ギヤ62、第1減速ギヤ62に設けられた第2伝動ギヤ67、第2伝動ギヤ67に咬み合った状態でギヤトランスミッション40の出力軸43に相対回転可能に支持された第2減速ギヤ63、第2減速ギヤ63に設けられた第3伝動ギヤ68、第3伝動ギヤ68に咬み合った状態で中継軸61に相対回転不能に支持された第3減速ギヤ64、中継軸61と出力軸43とわたって設けられ、中継軸61の動力を減速して出力軸43に伝達する減速ギヤ対65が備えられている。【選択図】図4


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    Title :

    TRANSMISSION DEVICE FOR TRAVEL OF TRACTOR, AND TRACTOR INCLUDING TRANSMISSION DEVICE FOR TRAVEL OF TRACTOR


    Additional title:

    トラクタの走行用伝動装置とこのトラクタの走行用伝動装置を備えるトラクタ


    Contributors:

    Publication date :

    2020-03-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES






    TRAVEL TRANSMISSION DEVICE FOR TRACTOR

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    Free access

    TRAVEL TRANSMISSION DEVICE FOR TRACTOR

    SONODA SHUNSUKE / TSUJI KENICHIRO / TAKEMOTO HIROKI | European Patent Office | 2020

    Free access