The invention discloses a low-pressure control valve set, an electro-hydraulic control system and a tractor, and relates to the technical field of power gear shifting. The low-pressure control valve set comprises an oil inlet pipeline, an oil return pipeline, a first electromagnetic valve set, a second electromagnetic valve set, a third electromagnetic valve set, a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve set, the second electromagnetic valve set, the third electromagnetic valve set, the first electromagnetic valve and the second electromagnetic valve are connected between the oil inlet pipeline and the oil return pipeline; the first electromagnetic valve set is connected with an AMT oil cylinder module, the second electromagnetic valve set is connected with a rear power output shaft, and the third electromagnetic valve set is connected with a clutch set used for controlling gears; the first electromagnetic valve is connected with a clutch used for controlling four-wheel drive; and the second electromagnetic valve is connected with a differential mechanism. The low-pressure control valve set is suitable for function control of the electro-hydraulic control system in a power gear shifting tractor, high integration of the low-pressure control valve set is realized, the mounting space is smaller and the pipeline arrangement is more convenient due to the compact valve body design, and the cost is effectively reduced.

    本发明公开了一种低压控制阀组、电液控制系统和拖拉机,涉及动力换挡技术领域。低压控制阀组包括:进油管路、回油管路以及连接在进油管路与回油管路之间的第一电磁阀组、第二电磁阀组、第三电磁阀组、第一电磁阀和第二电磁阀,其中,第一电磁阀组与AMT油缸模块连接,第二电磁阀组与后动力输出轴连接,第三电磁阀组与用于控制挡位的离合器组连接,第一电磁阀与用于控制四驱的离合器连接,第二电磁阀与差速器连接。本发明提供的低压控制阀组,适用于动力换挡拖拉机中电液控制系统的功能控制,实现了低压控制阀组的高度集成,紧凑的阀体设计使得安装空间更小,管路布置更加方便,有效地降低了成本。


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    Title :

    Low-pressure control valve set, electro-hydraulic control system and tractor


    Additional title:

    低压控制阀组、电液控制系统和拖拉机


    Contributors:
    CAI ERPENG (author) / SHENTU JUNYANG (author)

    Publication date :

    2021-09-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / 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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