To provide a hydraulic axle drive device that has been further miniaturized than conventional arts.SOLUTION: An axle drive device 1 comprises: an HST 3 comprising a center case 31 in which oil passages 32a, 32b for circulating hydraulic oil between a hydraulic pump 39 and a hydraulic motor 33 are formed; a reduction gear train 4 for transmitting the output of the HST 3 to axles 2L, 2R; and an axle drive case 10 for supporting the axles 2L, 2R and accommodates the HST 3 to form an oil reservoir. The hydraulic motor 33 comprises: a motor shaft 35; a cylinder block 33a in which a plurality of cylinders 33c is formed, and which is coaxially fixed to the motor shaft 35; a plurality of pistons 33b inserted into the cylinders 33c; a fixed swash plate 37 with which the plurality of pistons 33b is in contact; and a fixed swash plate holder 45 supporting the fixed swash plate 37 with respect to the axle drive case 10. The motor shaft 35 of the hydraulic motor 33 is pivotally supported by the center case 31 and the fixed swash plate holder 45.SELECTED DRAWING: Figure 5

    【課題】従来に比べさらなる小型化が実現された油圧式車軸駆動装置を提供する。【解決手段】車軸駆動装置1は、油圧ポンプ39と油圧モータ33との間で作動油を循環させる油路32a・32bが形成されるセンターケース31を備えたHST3と、HST3の出力を車軸2L・2Rに伝達する減速ギア列4と、車軸2L・2Rを支持し、HST3を収容して油溜まりを形成する車軸駆動ケース10と、を備え、油圧モータ33は、モータ軸35と、複数のシリンダ33cが形成され、モータ軸35に同軸で固定されるシリンダブロック33aと、シリンダ33cに挿通される複数のピストン33bと、複数のピストン33bが当接される固定斜板37と、固定斜板37を車軸駆動ケース10に対して支持する固定斜板ホルダー45とを備え、油圧モータ33のモータ軸35を、センターケース31と固定斜板ホルダー45とによって軸受支持する。【選択図】図5


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    Title :

    HYDRAULIC AXLE DRIVE DEVICE


    Additional title:

    油圧式車軸駆動装置


    Contributors:

    Publication date :

    2020-12-10


    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



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