Multi-load hydraulic sensing system for single-power source and multi-system working

Abstract

The invention relates to a multi-load hydraulic sensing system for single-power source and multi-system working, comprising a main liquid-control handle, an assistant liquid-control handle a load-sensitive variable pump, a load-sensing main steerer, a load-sensing assistant steerer, a front wheel steering oil cylinder, a back wheel steering oil cylinder, a front wheel hydraulic motor, a back wheel hydraulic motor and an operation actuating mechanism, wherein the load-sensitive variable pump is connected with a PVG multipath integrated valve, and the PVG multipath integrated valve is respectively connected with the main liquid-control handle and the assistant liquid-control handle, the front wheel steering oil cylinder and the rear wheel steering oil cylinder, and the operation actuating mechanism and also respectively connected with the load-sensing main steerer and the load-sensing assistant steerer through an anti-explosion two-position three-way electromagnetic valve; the load-sensing main steerer is connected with the front wheel steering oil cylinder, the load-sensing assistant steerer is connected with the back wheel steering oil cylinder, and the front wheel steering oil cylinder and the back wheel steering oil cylinder are connected through a three-position four-way electromagnetic valve; and a posture-adjusting valve and an anti-explosion two-position four-way electrohydraulic valve are arranged between the front wheel hydraulic motor and the back wheel hydraulic motor. The multi-load hydraulic sensing system can realize single-pump oil supply of a running system, a steering system and an operation actuating mechanism, and can also realize electric explosion prevention, two-way driving and all-around steering of the hydraulic system.

Description

technical field [0001] The invention relates to a hydraulic working system on a forklift, in particular to a multi-load sensing hydraulic system with a single power source and multiple systems working. Background technique [0002] Forklifts are classified according to the transmission mode, which can be divided into mechanical type (pure mechanical type and electromechanical type), hydraulic mechanical type and hydraulic transmission type. Purely mechanical forklifts generally have a complex structure; electromechanical forklifts require expensive electric speed control systems, and the explosion-proof problem of electric speed control devices must also be considered; hydraulic mechanical forklifts have low efficiency and high oil temperature. High, it is easy to cause high temperature on the surface of components, and the speed range is not wide enough; hydraulic transmission forklifts have the characteristics of low explosion-proof cost, stable transmission, continuou...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-load sensing hydraulic system with a single power source and multiple systems to solve the problems of explosion-proof forklift multi-pump oil supply, high fuel consumption, complex structure, and inability to drive in two directions and turn in all directions

Images