Hydraulic automatic opening and closing device for vehicle door and opening and closing method

Through the door hydraulic automatic shutter, the design of the two-way hydraulic pump and valve block is driven by the motor, the problem of insufficient door driving force and unstable performance in extreme environments is solved, and large driving force and multi-mode operation is achieved, which improves the comfort and safety of door opening.

CN120486859APending Publication Date: 2025-08-15HOERBIGER DRIVE TECH (CHANGZHOU) CO LTD
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Patent Information

Application Number
CN202510803406.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-16
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

The existing car door opening methods have insufficient driving force, large motor size, unstable performance in extreme environments, and traditional limiters cannot be maintained at any position, resulting in limited door opening angle, affecting comfort and safety.

Method used

The door hydraulic automatic shutter is adopted, and the two-way hydraulic pump is driven by a motor, combined with the valve block and hydraulic cylinder, multiple oil circuits and auxiliary oil circuits are designed to realize automatic or manual opening and closing of the door, including the first hydraulically controlled check valve, the second hydraulically controlled check valve and the shuttle valve to ensure that it can still work normally in extreme environments.

Benefits of technology

It realizes the door's stepless driving force, good freezing resistance, can work normally in extreme environments, and can still open and close manually when the motor is powered off, providing flexible installation methods and multiple operating modes, improving the comfort and safety of door opening.

✦ Generated by Eureka AI based on patent content.
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Abstract

A first output end of a two-way hydraulic pump is connected with one end of a second oil way, one end of a third oil way and one end of a first auxiliary oil way, the other end of the second oil way is connected with a left end connector of a shuttle valve, the second oil way is communicated with the third oil way, and a first hydraulic control one-way valve is installed in the third oil way; the other end of the third oil way is connected with a rodless cavity of the hydraulic cylinder, and the other end of the first auxiliary oil way is matched with one end of the second hydraulic control one-way valve. A second output end of the bidirectional hydraulic pump is connected with one end of a fourth oil way, one end of a fifth oil way and one end of a second auxiliary oil way, the other end of the fourth oil way is connected with a right end connector of the shuttle valve, the fourth oil way is communicated with the fifth oil way, a second hydraulic control one-way valve is installed in the fifth oil way, and the other end of the fifth oil way is connected with a rod cavity of the hydraulic cylinder. The other end of the second auxiliary oil way is matched with one end of the first hydraulic control one-way valve. According to the invention, the vehicle door can be automatically opened or closed.
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