Double-energy-storage type hydro-pneumatic spring integrated damping suspension hydraulic cylinder and vehicle

By integrating the design of the dual-energy storage type oil-air spring integrated damping suspension hydraulic cylinder and using a redundant pressure compensation mechanism, the problems of large space occupation, pressure loss and insufficient reliability of traditional suspension systems are solved, and a stable vibration reduction effect is achieved under high-frequency vibration conditions.

CN120963271AActive Publication Date: 2025-11-18XCMG HYDRAULICS CO LTD
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Patent Information

Application Number
CN202511421048.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-30
Publication Date
2025-11-18
Estimated Expiration
2045-09-30

AI Technical Summary

Technical Problem

Traditional suspension systems suffer from problems such as large space occupation, complex oil circuit layout, significant pressure loss, insufficient reliability, difficulty in coping with off-center load conditions, and poor sealing performance, especially insufficient damping performance under high-frequency vibration conditions.

Method used

The system adopts a dual-accumulator integrated damping suspension hydraulic cylinder with a dual-accumulator type air-oil spring. The internal oil circuit is directly connected through the integrated cylinder bottom. The dual accumulators are symmetrically arranged to form redundant pressure compensation. Combined with steel ball damping and floating piston structure, the system pressure stability and sealing performance are ensured.

Benefits of technology

This achieves a more compact suspension system structure, reduces space occupation, lowers pressure loss, improves system reliability and shock absorption, adapts to high-frequency vibration conditions, and prevents seal leakage.

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Abstract

The invention discloses a double-energy-storage type hydro-pneumatic spring integrated damping suspension hydraulic cylinder and a vehicle. The double-energy-storage type hydro-pneumatic spring integrated damping suspension hydraulic cylinder comprises a mounting cylinder bottom, a suspension cylinder and an energy accumulator. An oil passing channel is formed in the mounting cylinder bottom, and a first communicating opening and two second communicating openings are formed in the mounting cylinder bottom. The suspension cylinder and the energy accumulators are both fixedly installed on the installation cylinder bottom, the two sets of energy accumulators are arranged and located on the two sides of the suspension cylinder in the radial direction respectively, the suspension cylinder and the energy accumulators are communicated with the oil passing channel through the first communication opening and the second communication opening respectively, and the suspension cylinder and the energy accumulators are communicated through the oil passing channel. The problem of pressure loss caused by a lengthy oil way of a traditional suspension system is effectively solved, and internal transmission of the oil way is achieved through integrated installation of the cylinder bottom. The double energy accumulators are symmetrically arranged to form a redundant pressure compensation mechanism, and the pressure stability of the system under the continuous vibration working condition is ensured. The overall structure is compact in design, occupied space is reduced, and the requirement for miniaturization of a suspension system of a special vehicle is met.
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