Elastomer Damping Assembly Without Outer Sleeve for Secure Fit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing assemblies with spring devices for vibration damping in motor vehicle construction are complex and costly due to the need for multi-part vulcanization tools and tight tolerances for outer sleeves, which also pose safety risks for disengagement.
Innovation Solution
A damping device assembly without an outer sleeve, where the elastomer body directly bears against the inner circumferential surface of a first component, simplifying the vulcanization tool and eliminating the need for tight tolerances, while ensuring a secure fit through pretensioning and tolerance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an outer sleeve is used in the spring device, then the fit security and reliability are improved, but the device complexity and manufacturing cost increase due to multi-part vulcanization tools and tight tolerance requirements
Solution Approach 1:
The invention extracts and removes the outer sleeve component from the spring device assembly. The elastomer body is designed to directly bear against the inner circumferential surface of the opening, eliminating the need for the outer sleeve and its associated complex multi-part vulcanization tools while maintaining fit security through the elastomer's pretensioning capability
Solution Approach 2:
The invention changes the material parameter by using elastomer material with specific pretensioning properties to replace the rigid outer sleeve. The elastomer body's ability to deform and maintain pretension provides the necessary fit security without requiring tight manufacturing tolerances or complex assembly tools
2Strength
If an outer sleeve is used in the spring device, then the structural integrity is improved, but the manufacturing precision requirements and cost increase
Solution Approach 1:
The invention changes the material properties by using elastomer with inherent pretensioning capability, replacing the need for precisely fitted outer sleeves. The elastomer's elastic properties allow it to maintain structural integrity through deformation rather than relying on tight dimensional tolerances
Solution Approach 2:
The invention uses composite construction by integrating the elastomer body directly with the inner sleeve, creating a unified structure that combines the strength of the inner sleeve with the compliant, tolerance-compensating properties of the elastomer material
3Reliability
If an outer sleeve is used in the spring device, then the safety against disengagement is improved, but the ease of manufacture and assembly deteriorates
Solution Approach 1:
The invention removes the outer sleeve component that required complex assembly procedures including precise pressing and monitoring. The elastomer body's direct integration with the inner sleeve eliminates the need for separate outer sleeve installation steps while maintaining safety against disengagement through the elastomer's friction and interference fit properties
4Device complexity
If the elastomer body directly bears against the inner circumferential surface, then the manufacturing complexity is reduced, but the fit security must be maintained without an outer sleeve
Solution Approach 1:
The invention utilizes the elastomer material's inherent pretensioning parameter to provide fit security. The elastomer body is designed with specific geometric parameters that enable it to expand and bear against the inner circumferential surface with sufficient friction and normal force to prevent disengagement, replacing the mechanical security provided by the outer sleeve
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 solution reduces the complexity and cost of production, enhances the security and reliability of the damping device fit, and allows for adjustable stiffness ratios in axial and radial directions, improving vibration damping performance.
Implementation Method 1
By virtue of the fact that the elastomer body bears against the first component, its deformability serves to compensate for tolerance
Implementation Method 2
an elastomer body for fastening the damping device to the first component, which elastomer body surrounds the outer circumference of the inner sleeve and supports itself in a pretensioned manner against the inner circumferential surface
Data Source
AI summary
An assembly includes a first component having an opening with an inner circumferential surface; a clamping device through which a central longitudinal axis passes, and which comprises an inner sleeve with a bore for fastening the damping device to a second component; and an elastomer body for fastening the damping device to the first component. In embodiments, the elastomer body surrounds the outer circumference of the inner sleeve, the elastomer body supports itself in a pretensioned manner against the inner circumferential surface, and the damping device does not include an outer sleeve.