To make it possible to use in combination with a hydraulic continuous variable transmission system and a mechanical transmission system and to devise simplification and miniaturization of the structure of a travel transmission device.SOLUTION: A travel transmission device of a mobile vehicle is provided with a transmission formation changeover mechanism 3 capable of operating to change to a direct coupling transmission state in which gears of an input shaft 13 and an output shaft 14 interlock and a non-direct coupling state in which interlock of the gears is released. The transmission formation changeover mechanism 3 is provided with: a clutch body 30 capable of operating to change a gear transmission mechanism 24; a lock piston 31 capable of operating the clutch body 30; a spool capable of supplying and discharging charge pressure oil of a closed circuit to an oil chamber of the lock piston 31; and a spool operation body which changes over a pressure oil supplying/discharging direction by the spool. The spool operation body controls the pressure oil supplying/discharging to the lock piston 31 by the spool so that variable speed operation by a variable speed operation tool becomes to the direct coupling transmission state in a range of prescribed speed or more.SELECTED DRAWING: Figure 1

    【課題】油圧無段変速伝動系と、機械的な伝動系と、の併用可、及び走行伝動装置の構造の簡素化、及び小型化を図る。【解決手段】入力軸13と出力軸14がギヤ連動する直結伝動状態と、ギヤ連動が解除された非直結状態と、に切り換え操作可能な伝動形態切換機構3が備えられ、伝動形態切換機構3に、ギヤ伝動機構24を切り換え操作可能なクラッチ体30と、クラッチ体30を操作可能なロックピストン31と、ロックピストン31の油室に閉回路のチャージ圧油を給排可能なスプールと、スプールによる圧油給排方向を切換るスプール操作体と、が備えられ、変速操作具による変速操作が所定速度以上の範囲では直結伝動状態となるように、スプール操作体がスプールによるロックピストン31への圧油給排を制御する。【選択図】図1


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    Titel :

    TRAVEL TRANSMISSION DEVICE OF MOBILE VEHICLE


    Weitere Titelangaben:

    作業車の走行伝動装置


    Beteiligte:
    HINO MASAKAZU (Autor:in)

    Erscheinungsdatum :

    21.01.2021


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

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



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