Integrated air spring piston with pressure maintaining function

By integrating the pressure holder valve inside the air spring piston, the problems of easy damage to the external pressure holder valve and airbag deformation in the prior art affecting the gas exhaust are solved, and a more efficient pressure holder function and a simpler installation process are achieved.

CN119687136APending Publication Date: 2025-03-25ZHEJIANG MEILI HIGH TECH
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Patent Information

Application Number
CN202411726880.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The external installation of the existing air spring pressure-keeping valve is easily damaged or failed, and the airbag deformation during operation causes the gas to be exhausted through the pressure-keeping valve to be poorly exhausted, affecting the normal operation of the air spring.

Method used

An integrated air spring piston is designed, and the pressure holding valve is integrated inside the piston and located at the outlet of the exhaust passage. It realizes the sealing and pressure holding functions through a combination of brackets, seals, springs and fixtures.

Benefits of technology

This design makes the pressure-holding valve simple structure and convenient installation, and can effectively protect the air spring and suspension accessories, ensuring that the air spring always maintains a certain pressure, and avoid damage to parts caused by low air pressure.

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Abstract

The invention discloses an integrated air spring piston with a pressure maintaining function, relates to the technical field of automobile air suspension systems, solves the problem that a pressure maintaining valve is externally installed on an air spring and is prone to damage or failure, and comprises a piston body, a cavity is formed in the piston body, and an air inlet channel and an air outlet channel are formed in the piston body. A mounting cavity is formed in the position, located at an outlet of the exhaust channel, in the piston body, and a pressure retaining valve is mounted in the mounting cavity and comprises a support, a first through hole, a second through hole and a third through hole; a seal; air outlet holes are formed in the fixing part or the periphery of the fixing part; the spring is located between the fixing piece and the sealing piece and exerts abutting force on the sealing piece, so that the sealing piece is in sealing contact with the first through hole. The pressure retaining valve is integrated in the air spring piston, so that the air spring with the built-in height valve function has a certain pressure retaining function and is used for protecting the air spring and other accessories of an air suspension.
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