To secure hydraulic sources of an external hydraulic device and a hydraulic servo mechanism without largely changing a conventional constitution, to secure cooling capability of the hydraulic servo mechanism and the external hydraulic device, and to reduce cost of a hydraulic axle driving system.SOLUTION: An axle driving system 5 includes a pair of axle driving devices 4 having a housing 41, a continuously-variable transmission 40, an external oil feed circuit 78, a charge pump 70 and a servo set 100, and a mower lifting device 79, and includes a first oil feed port P1R, a first oil return port P2R and a port P3R for a tank in one of the housings 41, 41 and a second oil feed port P1L and a second oil return port P2L in the other housing, in which the external oil feed circuit 78 feeds oil to the mower lifting device 79 from the first oil feed port P1R, returns the oil fed to the mower lifting device 79 to the second oil return port P2L, feeds oil to the servo set 100 from the second oil feed port P1L, and returns the oil fed to the servo set 100 to the port P3R for a tank.SELECTED DRAWING: Figure 3

    【課題】従来の構成を大きく変更せずに、外部油圧機器と油圧サーボ機構の油圧源を確保するとともに、油圧サーボ機構と外部油圧機器の冷却能力を確保し、油圧式車軸駆動システムのコスト低減を図る。【解決手段】車軸駆動システム5は、ハウジング41、無段変速装置40、外部給油回路78、チャージポンプ70、サーボセット100、を有する一対の車軸駆動装置4とモア昇降装置79を備え、ハウジング41・41の一方の第1給油ポートP1R、第1返油ポートP2R、タンク用ポートP3Rと、他方の第2給油ポートP1L、第2返油ポートP2Lを備え、外部給油回路78が、第1給油ポートP1Rからモア昇降装置79に油を供給し、モア昇降装置79に供給した油を第2返油ポートP2Lに戻し、第2給油ポートP1Lからサーボセット100に油を供給し、サーボセット100に供給した油をタンク用ポートP3Rに戻す。【選択図】図3


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    Title :

    HYDRAULIC AXLE DRIVING SYSTEM


    Additional title:

    油圧式車軸駆動システム


    Contributors:
    YASUDA AKIFUMI (author) / MATSUURA JUN (author) / IWAKI KOJI (author)

    Publication date :

    2021-02-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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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