To provide an auxiliary drive device which restrains brake force from being generated by lack of oil quantity and at the same time can prevent a motor from being damaged even if a vehicle is towed by a traction vehicle at speed exceeding speed that is considered as limit of use of an auxiliary drive motor in the auxiliary drive device.SOLUTION: A hydraulic circuit 6 includes a hydraulic drain passage 64 which communicates a storage tank 69 which stores working fluid with a hydraulic drain port 43 and a pilot valve 67 which cuts off the hydraulic drain passage 64 by the hydraulic force applied from a gauge port 44 and at the same time opens the hydraulic drain passage 64 by spring force urged by hydraulic force when the hydraulic force is lost.SELECTED DRAWING: Figure 3

    【課題】 補助駆動装置における補助駆動モータの使用限界とされる速度を超えて牽引車両により牽引されたとしても、油量不足によるブレーキ力の発生を抑制するとともに、モータの損傷を防止することのできる、補助駆動装置を提供する。【解決手段】 油圧回路6は、油圧抜きポート43と作動油を貯留する貯留タンク69とを連通する油圧抜き路64と、ゲージポート44から受けた油圧力によって油圧抜き路64を遮断するとともに油圧力が無くなった場合に当該油圧力で付勢されていたバネ力によって油圧抜き路64を開放するパイロットバルブ67とを有する。【選択図】 図3


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    Title :

    AUXILIARY DRIVE DEVICE


    Additional title:

    補助駆動装置


    Contributors:

    Publication date :

    2024-06-21


    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 / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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