Shock Absorber Support Structure for Rebound Spring Eccentricity
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Solution Overview
Problem
Conventional shock absorbers face deformation issues due to eccentricity of the rebound spring with respect to the support, leading to increased manufacturing costs and weight.
Innovation Solution
The shock absorber incorporates a regulating portion in the support to manage the eccentricity of the lower collar, preventing deformation by ensuring the spring force is applied effectively without bending the support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support thickness is increased to prevent deformation when the rebound spring becomes eccentric, then the strength and deformation resistance of the support is improved, but the manufacturing cost and weight of the shock absorber increase
Solution Approach 1:
The patent applies local quality by providing a reinforcing rib only at the specific location where the lower collar contacts the support (the receiving portion), rather than uniformly thickening the entire support. This localized reinforcement concentrates material where the eccentric load is applied, preventing deformation at the critical point while keeping the rest of the support lightweight and cost-effective.
2Reliability
If the support thickness is increased to prevent deformation when the rebound spring becomes eccentric, then the durability of the support is improved, but the manufacturing cost increases
Solution Approach 1:
The reinforcing rib provides localized durability enhancement only at the receiving portion where eccentric loads are transmitted. This allows the support to maintain high durability at the critical load-bearing location while using minimal additional material, thereby avoiding the need to uniformly increase support thickness and associated manufacturing costs.
Solution Approach 2:
The support is segmented into different thickness regions: a thicker receiving portion with the reinforcing rib to handle eccentric loads, and a thinner cylindrical portion for general structural support. This segmentation allows optimization of material distribution, providing durability where needed while controlling overall manufacturing cost.
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 enhances the durability and strength of the support while preventing deformation, thus maintaining the shock absorber's performance without increasing manufacturing costs or weight.
Implementation Method 1
the coil spring contracts and exerts a spring force to suppress extension of the shock absorber
Implementation Method 2
a spring force is exerted to press a lower collar 103 against the receiving portion 100b of the support 100
Data Source
AI summary
A shock absorber of the present invention includes a cylinder, a piston slidably inserted into the cylinder, a piston rod movably inserted into the cylinder, a rebound spring including a coil spring disposed on an outer periphery of the piston rod and an annular lower collar attached to the coil spring, and an annular support facing the lower collar in an axial direction and supporting a piston side end of the lower collar, in which the support includes a cylindrical portion attached to the outer periphery of the piston rod, and a receiving portion that is annular, has an inner periphery connected to an anti-piston side end of the cylindrical portion, faces a piston side end of the lower collar in the axial direction, and is capable of abutting on the lower collar, and a regulating portion that regulates eccentricity of the lower collar with respect to the receiving portion is provided.