Interlocking Rubber Bush Half Shells for Noise Reduction
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Solution Overview
Problem
Rubber bushes used to connect vehicle components, such as axle carriers to vehicle structures, experience undesirable noise due to relative movement between identical half shells, which is not effectively mitigated by existing designs.
Innovation Solution
The rubber bush design incorporates projections and depressions on the circumferential ends of the half shells, allowing for a positive connection that restricts movement between the half shells, thereby reducing noise emission and facilitating correct alignment and assembly, with the rubber body connecting the half shells and inner part for enhanced stability and ease of production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer sleeve is composed of two half shells, then the rubber bush can be produced simply and economically, but the half shells are able to move relative to one another causing undesirable noise emission
Solution Approach 1:
The outer sleeve is divided into two identical half shells that can be produced separately and then assembled, maintaining the manufacturing simplicity benefit while enabling the noise reduction solution through subsequent connection features
Solution Approach 2:
Projections and corresponding depressions are introduced as intermediary connection features between the two half shells. These features act as mediators that prevent relative movement between the half shells, thereby eliminating the noise emission while preserving the segmented structure's manufacturing advantages
2Ease of operation
If the half shells are connected by the rubber body, then the assembly process is simplified, but the manoeuvrability of the half shells relative to one another is restricted
Solution Approach 1:
The projections and depressions are pre-formed on the half shells before assembly. This preliminary action ensures that when the half shells are brought together during assembly, the connections engage automatically and correctly, simplifying the assembly process while pre-establishing the constraints on relative movement
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 design effectively reduces noise emission by preventing relative movement between half shells, simplifies assembly, and enhances the structural stability and manufacturing efficiency of the rubber bush, making it suitable for vehicle applications.
Implementation Method 1
a rubber body arranged between the inner part and the outer sleeve
Data Source
AI summary
A rubber bush with an inner part (2) which extends in an axial direction (x), an outer sleeve (3) which surrounds the inner part (2) at a spacing and comprises two half shells (4, 5) which are configured as identical parts, and a rubber body (6) which is arranged between the inner part (2) and the outer sleeve (3), wherein the half shells (3, 4) are connected to the inner part (2) by the rubber body (6) and, at their circumferential-side ends which face one another, have projections (7, 8) and depressions (9, 10), into which the projections (7, 8) are insertable.