Hydraulic control system for double brake structure of stacker

Abstract

The invention relates to a hydraulic control system for a dual brake structure of a fork lift truck. The hydraulic control system mainly comprises two sets of identical brake control system bodies. Each brake control system body comprises a quick response module, a two-stage pressure regulation module, a brake feedback pressure-stabilization control module, a pedal assembly, a center feedback controller, a small oil pump and an energy accumulator. Each quick response module controls a brake pad through two electro-hydraulic servo control valves connected in parallel. The two-stage pressure regulation modules are used for regulating output pressure of a work oil path. The brake feedback pressure-stabilization control modules feed back the intensity of force of the pedal assemblies so as to stabilize the pressure and quickly supply work pressure oil. The hydraulic control system can achieve the brake effect quickly and stably, especially, due to the fact that the two sets of identical assemblies are adopted, the redundancy effect is generated, and the two sets of assemblies are spare to each other; due to the dual brake structure, when emergency brake happens, advantages are achieved, the left foot and the right foot can pedal brake pedal valves together during emergency brake, and the vehicle speed is reduced quickly and stably till a vehicle stops.

Description

technical field [0001] The invention relates to a brake structure of a stacker, in particular to a hydraulic control system for a double brake structure of a stacker. Background technique [0002] At present, with the rapid development of my country's cargo logistics, more and more goods such as containers, boxes, etc. need to be stacked together to save storage space, resulting in the emergence of stackers. The stacker has simple structure, flexible operation, good micro-movement, and high explosion-proof safety performance. It is suitable for operations in narrow passages and limited spaces, and is an ideal equipment for loading and unloading pallets in high-bay warehouses and workshops. It can be widely used in petroleum, chemical, pharmaceutical, textile, military, paint, pigment, coal and other industries, as well as in ports, railways, freight yards, warehouses and other places containing explosive mixtures, for loading, unloading, stacking and handling operations. I...

AI Technical Summary

Problems solved by technology

[0004] First of all, the gear pump is used in the braking system, which is a quantitative pump, and it is matched with an ordinary valve (switch valve). When the driver steps on the pedal, the pedal controls the brake valve. Since such a brake valve is Ordinary valves usually cannot quickly and preliminarily control the output hydraulic displacement according to the strength used by the driver, and when the driver steps on the pedal, the brake valve may be fully opened, and when the pedal is lifted, it will reset and brake. The valve is closed, so the fully open and fully closed situation results in wasted power absorbed by the pump

[0005] Secondly, an accumulator is used in the braking system, and the stacker may have multiple braking gears for backing up pressure on the brake pads due to the weight of the cargo being carried, but the general hydraulic system for braking cannot provide Corresponding to a variety of pressure adjustment levels, if one pressure adjustment level is always used, in the case of different weights, if there is no suitable pressure adjustment level corresponding to it, it will either lead to waste of power, or there will be a problem in the hydraulic system. Possibility of causing impact, in severe cases it will lead to damage of hydraulic components

[0006] Third, most of the current braking systems use ordinary valves (on-off valves) to directly provide pressure oil to the brake pads to control the action of the brake pads. This has the disadvantages of insufficient response speed and insufficient output flow. Failure to brake quickly will cause major safety accidents to the stacker, and seriously endanger the safety of surrounding personnel and goods

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