Self-Leveling Shock Absorber Relief Valve Retention
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Solution Overview
Problem
Conventional self leveling shock absorbers face issues with the relief valve escaping from its mounting position due to narrow spaces and the fixing member of the pump rod potentially escaping during use, compromising the assembly and functionality.
Innovation Solution
The relief valve is securely positioned under the pump rod with a seat, ball, and elastic member, and a leaf spring is used to prevent escape, allowing for smooth rotation and sliding movements while maintaining the assembly condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the relief valve is press-fitted into the upper holder, then the mounting space is narrow, but the relief valve may escape when high pressure is instantaneously generated
Solution Approach 1:
The relief valve is repositioned from the upper holder to the body valve, changing its spatial location and mounting orientation. This dimensional relocation provides a more suitable mounting environment with adequate space while ensuring secure retention through proper positioning under the pump rod
Solution Approach 2:
The ball and seat mechanism acts as an intermediary between the relief valve and the body valve. The ball seated on the seat provides a positive mechanical lock that prevents the relief valve from escaping under high pressure conditions
2Reliability
If the fixing member is press-fitted into the body valve to prevent pump rod escape, then the assembly is secured, but the fixing member may escape during use
Solution Approach 1:
The pump rod assembly is secured by positioning the relief valve under the pump rod and using the ball-seat mechanism, rather than using a separate fixing member press-fitted into the body valve. This alternative positioning and locking mechanism provides more reliable retention
Solution Approach 2:
The ball and seat mechanism serves dual functions: it acts as the relief valve seating mechanism and simultaneously provides the locking function to prevent pump rod escape. This self-service approach eliminates the need for a separate fixing member that could escape
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents the relief valve from escaping and ensures the assembly of the pump rod is securely maintained, allowing for effective vibration absorption and vehicle height adjustment without compromising the structural integrity.
Implementation Method 1
a ball support and an elastic member for compressing the ball toward the seat
Implementation Method 2
a leaf spring, which has elasticity and is in contact with the body valve, is installed on an external circumference surface of a lower end of the pump rod, whereby the pump rod is prevented from escaping
Data Source
AI summary
A self leveling shock absorber includes a base shell, an inner tube in the base shell, having a low pressure chamber between the shell and the inner tube, a piston rod in the inner tube and having a hollow portion with an upper portion closed, a piston valve coupled to the piston rod, dividing space in the inner tube into rebound and compression chambers. An outer tube installed to a lower portion of the inner tube having a high pressure chamber and a gas chamber between the shell and the outer tube. A diaphragm divides the high pressure chamber from the gas chamber. A body valve is installed to a lower end of the inner tube to control flow of fluid between the low pressure chamber and the high pressure chamber, and a pump rod is provided having a hollow portion and one end installed to the body valve and another end inserted into the hollow portion of the piston rod. A relief valve is positioned under the pump rod.