Fiber-Reinforced Spring Guide for Shock Absorber Insertion Strength
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Solution Overview
Problem
Resin spring seats used in vehicle suspension systems are prone to damage due to low strength and brittleness when the cylinder is inserted, posing a risk of structural failure.
Innovation Solution
A spring guide made of fiber-reinforced resin with a disc-shaped base portion and a barrel portion, where the fiber-reinforced resin is oriented in the circumferential direction to enhance strength, and features ribs and a hub to improve structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a resin spring seat is used, then the weight is reduced and ease of manufacture is improved, but the strength and reliability deteriorate due to low strength and brittleness
Solution Approach 1:
The patent uses fiber-reinforced resin as a composite material to manufacture the spring seat. The resin contains reinforcing fibers (such as glass fibers or carbon fibers) that significantly enhance the strength and stiffness of the spring seat while maintaining the weight advantages of plastic materials. This composite structure allows the spring seat to withstand the mechanical loads and insertion forces without breaking.
Solution Approach 2:
The patent implements local reinforcement by concentrating fiber reinforcement in the barrel portion where the cylinder is inserted. The fiber orientation is specifically designed to align with the radial load directions that occur during cylinder insertion. This local quality enhancement ensures that the critical areas have the necessary strength while other areas maintain the lightweight characteristics of plain resin.
2Ease of manufacture
If a resin spring seat is used, then the ease of manufacture is improved, but the reliability deteriorates due to brittleness and risk of damage during cylinder insertion
Solution Approach 1:
The fiber-reinforced resin provides both manufacturability through injection molding and enhanced reliability through the reinforcing fibers. The composite material can be processed using standard injection molding techniques while the fibers provide crack resistance and prevent catastrophic failure during cylinder insertion.
Solution Approach 2:
The patent applies local reinforcement specifically in the barrel portion where reliability is most critical during cylinder insertion. The fiber concentration and orientation are optimized in this area to prevent damage, while other areas of the spring seat maintain the ease of manufacture characteristics of thermoplastic materials.
3Ease of operation
If the cylinder is inserted through the cylindrical portion, then the assembly is completed, but the spring seat is damaged due to radial load on the brittle resin
Solution Approach 1:
The patent provides localized reinforcement in the barrel portion specifically designed to handle the radial loads during cylinder insertion. The fiber orientation in this region is arranged to resist the circumferential stresses that occur during the insertion process, allowing easy assembly without damage to the spring seat.
Solution Approach 2:
The fiber reinforcement acts as a preemptive strengthening measure that is built into the spring seat before assembly. This beforehand reinforcement ensures that when the cylinder insertion radial loads are applied, the spring seat has sufficient strength to withstand the stress without damage, effectively cushioning against potential failure.
Data Source
AI summary
A spring guide made of fiber-reinforced resin, includes: a disc-shaped base portion configured to support a coil spring, the coil spring being configured to elastically support a vehicle body; and a barrel portion through which a cylinder of a shock absorber is inserted, in the barrel portion, the fiber-reinforced resin is oriented in a circumferential direction.