Hydraulic brake valve and hydraulic system thereof

By integrating components such as check valves and brake valve groups into a hydraulic brake valve, eliminating the filling valve, and using the priority valve CF port as the oil source, the problems of high cost and high energy consumption of the fully hydraulic power braking system are solved, and a high-efficiency and low-cost fully hydraulic power braking system is realized.

CN120156489BActive Publication Date: 2025-12-23GUANGDONG TINGJIA HYDRAULIC TECH CO LTD
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Patent Information

Application Number
CN202510471126.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-15
Publication Date
2025-12-23
Estimated Expiration
2045-04-15

AI Technical Summary

Technical Problem

Fully hydraulic power braking systems are costly and energy-intensive on loaders. The filling valve has a complex structure and accounts for more than half of the cost. The addition of a hydraulic pump increases costs and makes installation difficult.

Method used

Design a hydraulic brake valve that integrates a check valve, brake valve assembly, brake light pressure switch, low pressure alarm pressure switch, shuttle valve, high and low pressure unloading valves, and throttle orifice. The oil source is taken from the original priority valve CF port of the equipment. The pressure feedback signal is selected through the shuttle valve, eliminating the need for a filling valve, and realizing the filling and steering operation of the fully hydraulic power braking system.

Benefits of technology

It achieves a fully hydraulic power braking system with fast braking response, low noise, low failure rate, high safety factor, compact structure, low cost, and low energy consumption.

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Abstract

The application relates to the technical field of loader brake valves, and discloses a hydraulic brake valve and a hydraulic system thereof, which comprises a hydraulic brake valve, wherein the hydraulic brake valve is composed of a check valve, a brake valve group, a brake lamp pressure switch, a low-pressure alarm pressure switch, a shuttle valve, a high-low pressure unloading valve and a throttle hole, the high-low pressure unloading valve and the throttle hole are integrated, and the hydraulic brake valve is externally provided with a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch. By canceling a liquid filling valve, the oil source of a full-hydraulic power brake system is taken from a priority valve CF port of an existing device, a shuttle valve on the hydraulic brake valve is used for selecting a pressure feedback signal, the pressure feedback signal is transmitted to the priority valve, the full-hydraulic power brake system is filled with liquid and energy is supplemented, or the steering system is used for steering, and the hydraulic brake valve has the advantages of fast brake response, small noise, low failure rate, high safety coefficient, compact structure, low cost, low energy consumption and the like.
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