The invention discloses a control system for a working platform of a scissor lift truck. The control system involves a first reversing valve, an oil cylinder, a back pressure valve, a direct current motor, a metering pump and an oil tank; and the first reversing valve is provided with an opening A, an opening B, an opening P and an opening T, the opening A of the first reversing valve is connectedwith a rodless cavity of the oil cylinder, the opening B of the first reversing valve is connected with a rod cavity of the oil cylinder, the opening P of the first reversing valve is connected withan oil outlet of the metering pump, the opening T of the first reversing valve is connected with an inlet of the oil tank, the back pressure valve is arranged on a hydraulic pipeline between the opening A of the first reversing valve and the rodless cavity of the oil cylinder, and a driving shaft of the direct current motor is fixedly connected with a pump shaft of the metering pump. According tothe control system for the working platform of the scissor lift truck, the back pressure valve and the direct current motor are additionally arranged for speed regulation, and shaking and stall of thelifting platform in the lifting process are eliminated.
本申请公开了一种剪叉升降搬运车工作平台的控制系统,包括第一换向阀、油缸、背压阀、直流电机、定量泵和油箱;第一换向阀具有A口、B口、P口和T口,第一换向阀的A口与油缸的无杆腔连接,第一换向阀的B口与油缸的有杆腔连接,第一换向阀的P口与定量泵的油液出口连接,第一换向阀的T口与油箱的进口连接,背压阀设于第一换向阀的A口与油缸的无杆腔之间的液压管路上,直流电机的驱动轴与定量泵的泵轴固定连接。本申请提供的剪叉升降搬运车工作平台的控制系统通过增加背压阀和直流电机调速,消除升降平台在升降过程中的抖动和失速。
Control system for working platform of scissor lift truck
一种剪叉升降搬运车工作平台的控制系统
2020-10-02
Patent
Electronic Resource
Chinese
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
Storage and transportation integrated scissor lift and working platform
European Patent Office | 2024
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