Shock Absorber Cylindrical Member Assembly
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Solution Overview
Problem
The assembly of components for biasing the disc valve in existing shock absorbers is complicated, leading to difficulties in insertion and fixation, which can result in improper seating of disc valves and potential fluid leakage.
Innovation Solution
A shock absorber configuration that includes a cylindrical member with a radially extending gap on the inner side of the valve main body's inner seat, allowing the fixed shaft to be inserted through both the cylindrical member and the spring-force application means, facilitating the assembly process by eliminating the need for threadable engagement and reducing the risk of damaging the seat surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threadable engagement is used to assemble the spring-force application means to the valve main body, then the connection strength is improved, but the assembly complexity increases and the risk of damaging the seat surface increases
Solution Approach 1:
The patent replaces the threadable engagement mechanism with a press-fit cylindrical member system. The cylindrical member is pressed into the valve main body through the fixed shaft, eliminating the need for threading operations. This substitution reduces assembly complexity while maintaining connection strength through the press-fit design and the structural integration of the cylindrical member with both the valve main body and the spring-force application means.
Solution Approach 2:
The patent employs a nested structure where the cylindrical member is inserted through the fixed shaft and into the valve main body, with the spring-force application means positioned within the cylindrical member. This nesting arrangement allows multiple components to be assembled in a sequential, space-efficient manner, reducing assembly complexity while ensuring proper alignment and connection strength.
2Strength
If threadable engagement is used to assemble the spring-force application means, then the connection strength is improved, but the assembly time increases
Solution Approach 1:
The patent replaces the time-consuming threadable engagement process with a rapid press-fit operation. The cylindrical member is simply pressed into the valve main body through the fixed shaft, eliminating the need for threading operations. This substitution significantly reduces assembly time while maintaining connection strength through the press-fit design and structural integration.
Solution Approach 2:
The patent designs the cylindrical member and valve main body with pre-configured dimensions and tolerances that enable direct press-fit assembly without requiring preliminary threading or alignment operations. The fixed shaft is designed to guide the cylindrical member into proper position during insertion, eliminating the need for separate alignment steps and reducing overall assembly time.
3Ease of manufacture
If the cylindrical member is pressed into the valve main body, then the assembly is simplified, but the seat surface may be damaged due to abnormal pressing
Solution Approach 1:
The patent carefully controls the dimensional parameters of the cylindrical member and the receiving cavity in the valve main body to ensure proper fit during press assembly. The diameter, length, and tolerance specifications are optimized to achieve sufficient interference fit for strong connection while preventing excessive pressing forces that could damage the seat surface. This parameter optimization enables simplified assembly without compromising reliability.
Solution Approach 2:
The patent designs the press-fit interface with built-in protective features, such as rounded transition zones and controlled interference fit dimensions, that prevent stress concentration and abnormal pressing during assembly. The cylindrical member and valve main body are designed to distribute pressing forces evenly, preventing localized overload that could damage the seat surface while still achieving the desired connection strength.
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
This configuration simplifies the insertion and fixation operation, prevents issues related to abnormal pressing, and ensures proper seating of disc valves, thereby enhancing the operational reliability and preventing fluid leakage.
Implementation Method 1
spring-force application means for applying a force in a valve-closing direction to the disc valve
Data Source
AI summary
A shock absorber which facilitates an insertion/fixation operation. The shock absorber includes a spring-force application unit (84) for applying a force in a valve-closing direction to a disc valve while allowing the fixed shaft to be inserted therethrough; and a cylindrical member (47) for allowing the fixed shaft (21) to be inserted therethrough. The disc valve includes a plurality of valve discs (53) to (58). The cylindrical member is inserted into each of the valve discs (53) to (58) and the spring-force application unit (84), in which: the cylindrical member (47) is provided so as to have a radially extending gap on an inner side of the inner seat (31) of the valve main body (14).