The invention discloses a four-wheel hydraulic steering system which comprises a first electro-hydraulic steering gear, a first flow amplifier, a front axle left steering cylinder, a front axle right steering cylinder, a steering valve set, a plunger pump and a hydraulic oil tank. The plunger pump is used for generating pressure oil and providing pressure and flow for hydraulic oil of the system; the steering valve set is used for providing pressure oil for the first flow amplifier, the first flow amplifier is used for controlling the front axle steering cylinder to act, the first electro-hydraulic steering gear is used for providing pilot control oil for the first flow amplifier, and the front axle steering cylinder serves as an execution device and is used for driving a front wheel steering mechanism of a vehicle to complete steering. The hydraulic oil tank is used for storing hydraulic oil. The invention further discloses an unmanned mining dump truck with the electric wheels and a four-wheel hydraulic steering method. The two flow amplifiers are controlled through the two electro-hydraulic steering gears to achieve steering actions of the front steering cylinder and the rear steering cylinder, and the steering requirement of bidirectional driving is met.

    本发明公开了一种四轮液压转向系统,包括:第一电液转向器、第一流量放大器、前桥左转向缸、前桥右转向缸、转向阀组、柱塞泵、液压油箱;柱塞泵用于产生压力油,为系统的液压油提供压力与流量;转向阀组用于给第一流量放大器提供压力油,第一流量放大器用于控制前桥转向缸动作,第一电液转向器用于为第一流量放大器提供先导控制油,前桥转向缸作为执行装置,用于驱动车辆的前轮转向机构完成转向;液压油箱用于液压油的储存。本发明还公开了一种无人驾驶电动轮矿用自卸车、四轮液压转向方法。本发明通过两个电液转向器控制两个流量放大器实现前后转向缸的转向动作,满足双向行驶的转向要求。


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    Title :

    Unmanned mining dump truck with electric wheels and four-wheel hydraulic steering system and method


    Additional title:

    无人驾驶电动轮矿用自卸车、四轮液压转向系统及方法


    Contributors:
    MA CHAO (author) / MENG YOUPING (author) / CHEN JUNYU (author) / WANG FENGQUAN (author) / ZHANG BO (author) / CHEN MINMIN (author) / WANG FEIYU (author) / DI ZHIHONG (author) / ZHAO LEI (author)

    Publication date :

    2025-03-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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