Rubber-Metal Bearing Bush Locking for Higher Press-Out Force
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Solution Overview
Problem
Existing bearing arrangements for motor vehicle components, such as axle subframes and engine mounts, face challenges in achieving a higher service life and increased press-out force during the press-in operation of rubber/solid bearings, often resulting in unintended deformation or breakage of projections and depressions.
Innovation Solution
A bearing arrangement featuring a metallic bearing bush with inwardly directed projections and complementary depressions on the outer sleeve of the rubber/solid bearing, where projections are angled and offset to engage positively with depressions, providing a secure locking mechanism and increased press-out force, while avoiding deformation during the press-in operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inwardly directed projections are configured in the bearing bush to provide a fixed seat and increase press-out force, then the service life and press-out force are improved, but unintended deformation or breakage of projections may occur during press-in operation
Solution Approach 1:
The bearing bush is divided into multiple circumferential zones with projections distributed across these zones. Each zone contains a set of projections that engage with corresponding depressions in the outer sleeve, distributing the locking force across multiple engagement points rather than relying on a single continuous projection structure.
Solution Approach 2:
Adjacent projections are arranged at different axial heights, creating an asymmetric pattern around the circumference. This asymmetric arrangement ensures that projections engage with depressions at staggered positions during the press-in operation, preventing simultaneous engagement that could cause deformation or breakage.
2Stability of the object's composition
If projections are arranged to engage positively with depressions for a secure locking mechanism, then the fixed seat is improved, but the complexity of the press-in operation increases
Solution Approach 1:
The locking mechanism is segmented into multiple discrete projection-depression pairs distributed circumferentially. Each pair acts as an independent locking element that engages sequentially during press-in, providing cumulative stability without requiring a single complex locking feature.
Solution Approach 2:
The projections are designed with specific geometric parameters including angled surfaces and offset positions. The angle of the projections with respect to the circumferential face and their axial offsets are optimized to enable smooth engagement during press-in while ensuring positive locking in the final assembled state.
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
The solution enhances the service life of the bearing arrangement by ensuring a secure seat for the rubber/solid bearing and increasing the press-out force, preventing unintended deformation and breakage of projections, and optimizing force transmission, thereby improving the durability and performance of the bearing system.
Implementation Method 1
an elastomer material being arranged between the outer sleeve and the inner sleeve, which elastomer material is connected, by way of vulcanization to the inner and the outer sleeve
Implementation Method 2
the projections engage in a positively locking manner into the depressions, with the result that the rubber/solid bearing is latched in the bearing bush
Implementation Method 3
The rubber/solid bearing is additionally held in the bearing bush by way of a press fit between the outer sleeve and the bearing bush
Data Source
AI summary
The present disclosure relates to a bearing arrangement having a bearing bush and a rubber/solid bearing which is inserted into the bearing bush with an outer sleeve and an elastomer material which is arranged therein. The bearing bush has inwardly pointing projections, and depressions are configured in the outer sleeve, into which depressions the projections engage.