Composite Spring Guide Structure Against Stone and Water Damage
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Solution Overview
Problem
The durability of spring guides in suspension devices, particularly those made of resin, is compromised by disturbances such as stepping stones and water, leading to potential deterioration and damage.
Innovation Solution
A spring guide design incorporating a covering portion made of a material with different physical properties from the resin main body, along with an elastic portion, to protect against impacts and water adhesion, enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the spring guide is formed of a resin material, then the weight and manufacturing cost are reduced, but the strength and durability decrease due to disturbances such as stepping stones and water
Solution Approach 1:
The spring guide is constructed using composite materials: the main body is made of resin material while the covering portion is made of a different material (such as rubber or elastomer) with superior resistance to disturbances. This composite structure combines the advantages of both materials - the lightweight and cost-effective resin body with the durable, disturbance-resistant covering layer - thereby resolving the contradiction between using resin for weight/cost reduction and needing strength/durability against external harmful factors.
2Reliability
If a covering portion made of different material is added to protect the spring guide, then the durability against disturbances is improved, but the device complexity increases
Solution Approach 1:
The covering portion is integrally molded with the resin main body in a single manufacturing process, merging two previously separate components into one unified part. This integration maintains the durability benefits of the multi-material construction while eliminating the complexity of separate assembly steps, fasteners, and joints. The single-mold process ensures reliable bonding between materials while simplifying the overall device structure and reducing manufacturing complexity.
3Ease of manufacture
If the covering portion is integrally molded with the main body, then the manufacturing process is simplified and costs are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The integral molding process uses local quality differentiation by injecting different materials into specific regions of the mold - the resin material forms the main body while the covering material is injected into the covering portion region. This localized material placement allows each region to be optimized for its specific function while maintaining the benefits of integral construction. The molding process accounts for the different physical properties of each material, ensuring precise dimensional control and proper bonding interfaces without requiring excessive overall manufacturing precision.
Data Source
AI summary
A spring guide includes: a main body portion of which a coil spring is placed on a vehicle side, the main body portion being formed of a resin material; and a covering portion that covers an anti-spring side of the main body portion opposite to the coil spring. The covering portion is formed of a material having a physical property different from that of the resin material forming the main body portion.