Dual-Spring Shock Absorber Crossover Bumper for Noise Damping
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Solution Overview
Problem
Dual-spring shock absorbers generate loud noise and cause surface damage due to the rigid contact between the spring coupler and the aluminum crossover ring, especially at high speeds, leading to undesirable noise and potential wear on the crossover ring.
Innovation Solution
The implementation of a crossover bumper system comprising a backer ring and a damper ring with different materials and configurations, such as a polymer-based backer ring and an elastomeric damper ring, to absorb the impact and reduce noise, preventing direct contact between the spring coupler and the crossover ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid aluminum crossover ring is used, then the structural strength and durability are improved, but loud noise is generated when the spring coupler strikes it
Solution Approach 1:
A polymer bumper is introduced as an intermediary component between the rigid aluminum crossover ring and the spring coupler. The bumper absorbs impact forces and prevents direct metal-to-metal contact, thereby eliminating the loud noise generated during compression while maintaining the structural integrity of the aluminum ring.
Solution Approach 2:
The crossover assembly uses a composite structure combining aluminum (for strength) and polymer materials (for noise damping). The aluminum crossover ring provides structural support while the polymer bumper layer provides noise reduction, creating a multi-material solution that addresses both strength and noise concerns simultaneously.
2Stability of the object's composition
If a rigid aluminum crossover ring is used, then the structural stability is improved, but surface damage and marks occur from spring contact
Solution Approach 1:
The polymer bumper acts as a protective intermediary between the springs and the aluminum crossover ring. It absorbs the friction and contact forces during compression, preventing the springs from directly marking or damaging the aluminum surface while the ring maintains its structural stability.
Solution Approach 2:
The polymer bumper is positioned in advance to cushion and absorb potential impact forces before they reach the aluminum crossover ring. This pre-cushioning effect prevents surface damage from occurring in the first place, protecting the ring during normal operation.
3Speed
If the spring coupler directly contacts the aluminum crossover ring at high speeds, then the response time is improved, but loud noise is generated
Solution Approach 1:
The polymer bumper serves as a mediator that allows rapid compression response while dampening the impact noise. The polymer material can deform quickly to accommodate high-speed compression but absorbs the strike energy, preventing noise generation even during fast movements.
Solution Approach 2:
The introduction of the polymer bumper changes the material parameters at the contact interface from rigid aluminum-to-rigid plastic impact to a more compliant polymer absorption mechanism. This parameter change allows maintaining response speed while reducing the harmful noise output.
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
Significantly reduces noise and prevents surface damage on the crossover ring by absorbing the impact, ensuring a quieter and more durable operation of the shock absorber.
Implementation Method 1
a second ring attached to the first side of the first ring and comprising a second material forming a ring-shaped body... wherein the first material has a modulus of elasticity that is greater than a modulus of elasticity of the second material
Implementation Method 2
crossover bumper for damping noise in a dual-spring shock absorber
Data Source
AI summary
A crossover bumper for damping noise in a dual-spring shock absorber that includes a spring coupler and a crossover ring. The crossover bumper includes a first ring having a first material forming a ring-shaped body that includes a first side and a second side facing opposite to the first side, and that defines a central opening, an inside diameter and an outside diameter; and a second ring attached to the first side of the first ring and including a second material forming a ring-shaped body defining a central opening aligned with the central opening of the first ring, an inside diameter and an outside diameter. The first material has a modulus of elasticity that is greater than a modulus of elasticity of the second material.