Multi-load hydraulic sensing system for single-power source and multi-system working
A single power source, hydraulic system technology, applied in the direction of lifting device, fluid steering mechanism, control device, etc., can solve the problems of inability to drive in two directions and omnidirectional steering, multi-pump oil supply for explosion-proof forklifts, complex structure, etc., and achieve explosion-proof costs. Low cost, reduced explosion-proof cost and technical difficulty, and multi-functional effects
Inactive Publication Date: 2011-01-26
ORDNANCE TECH RES INST OF THE GENERAL ARMAMENT DEPT PLA
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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
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[0018] like figure 1 As shown, the multi-load sensing hydraulic system of the present invention includes a main hydraulic control handle 13, an auxiliary hydraulic control handle 14, a load sensitive variable pump 1, a load sensing main steering gear 2, a load sensing auxiliary steering gear 3, and a front wheel steering cylinder 4. Rear wheel steering oil cylinder 5, front wheel hydraulic motor 9, rear wheel hydraulic motor 10, working actuator 8 and other parts.
[0019] A shuttle valve and three three-position seven-way reversing valves 21 (the number of three-position seven-way reversing valves can be increased or decreased as required) are arranged in the PVG multi-way integrated valve 7 in a conventional manner. The entry and exit of the working actuator 8 The oil circuit is tapped on the two three-position seven-way reversing valves 21 on the right. A priority valve 19 as a preceding mechanism of the PVG manifold valve is also built in the PVG manifold valve 7 . Among...
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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...
Claims
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IPC IPC(8): B62D5/06B60K17/10B66F9/22
Inventor 穆希辉杜峰坡李良春来升罗磊马振书葛强郭浩亮夏福君张文亮
Owner ORDNANCE TECH RES INST OF THE GENERAL ARMAMENT DEPT PLA
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