The invention provides an extension method and system for a driving chassis axle. The method comprises a normal extension mode, a resistance-meeting extension mode, a limit extension mode and a free extension mode. In the normal expansion mode process, when the pressure value of the expansion oil cylinder encounters obstacles and exceeds the set pressure of the system, the expansion oil cylinder is switched to the resistance expansion mode, after the expansion oil cylinder passes through the swing wheels, the pressure value is decreased, bridge expansion continues, and if the pressure value is not decreased, the expansion oil cylinder is switched to the limit expansion mode. The free expansion mode is that at least one wheel or axle is manually controlled by operating an equipment panel; the system comprises electromagnetic directional valves arranged on hydraulic pipelines of wheels and axles, corresponding balance valves and hydraulic locks, compensation valves are arranged between the electromagnetic directional valves and a main oil inlet pipeline, first overflow valves with the pressure value smaller than that of second overflow valves are arranged at the two ends of the electromagnetic directional valves at the extension bridge end, and graded protection is achieved. Through each single-control valve group and matched control logic, automatic de-trapping and successful bridge expansion in a limited area are realized.

    本发明提供了一种行驶底盘车桥的扩展方法及系统,方法包括正常扩展模式、遇阻扩展模式、极限扩展模式和自由扩展模式;正常扩展模式过程中,遇到阻碍扩展油缸压力值增大超过系统设定压力,转入遇阻扩展模式,经过摆动车轮后,压力值变小,则继续扩桥,若压力值未减小,则转入极限扩展模式,自由扩展模式为手动通过操作设备面板进行至少一个车轮或车桥的控制;系统包括设置在各车轮和车桥液压管路的电磁换向阀,以及对应的平衡阀和液压锁,电磁换向阀与主进油管路之间设置补偿阀,扩展桥端电磁换向阀两端设置压力值小于第二溢流阀的第一溢流阀,实现分级保护。通过单控的各阀组和配合的控制逻辑,实现自动脱困,以及有限区域内成功扩桥。


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    Title :

    Extension method and system for driving chassis axle


    Additional title:

    一种行驶底盘车桥的扩展方法及系统


    Contributors:
    GAO HAO (author) / RUAN YONGQIANG (author) / WEN QIANG (author) / TAN ZHONGRUI (author)

    Publication date :

    2025-01-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60B VEHICLE WHEELS , Räder für Fahrzeuge / B62D MOTOR VEHICLES , Motorfahrzeuge



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