Bearing Arrangement Form-Fit Transverse Force Transmission
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Solution Overview
Problem
Existing rubber/metal bushings in motor vehicle wheel suspensions lack a secure mechanism for transmitting transverse forces without relying on frictional engagement, leading to inefficiencies in force transmission and potential vibration issues.
Innovation Solution
A bearing arrangement featuring an inner sleeve with a contact portion formed at its end region, which is compressed by a connector's clamp force to create a form-fit engagement with a shaft portion, enabling secure transverse force transmission through multiple shear surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If radial spacing is provided between the bolt and inner sleeve to facilitate insertion, then ease of assembly is improved, but transverse force transmission capability deteriorates due to lack of positive fit or frictional connection
Solution Approach 1:
The inner sleeve is segmented into different functional regions: an end region with a contact portion for force transmission and a central region with radial spacing for easy insertion. This segmentation allows the bolt to be inserted easily through the spaced central region while the contact portion at the end provides secure transverse force transmission through form-fit engagement.
Solution Approach 2:
The inner sleeve has non-uniform geometry with a contact portion at the end region that is designed specifically for form-fit engagement with the bolt. This local quality change creates a positive fit at the contact portion while maintaining radial spacing in other regions, thereby achieving both easy assembly and reliable force transmission.
2Device complexity
If frictional engagement is used for transverse force transmission, then device complexity is reduced, but transmission efficiency and reliability deteriorate
Solution Approach 1:
The connector is designed to apply a clamp force that preliminarily compresses the contact portion of the inner sleeve against the shaft portion before any transverse forces are transmitted. This preliminary action creates a form-fit engagement that ensures reliable force transmission without relying on friction alone, while the overall connection mechanism remains relatively simple.
3Reliability
If the inner sleeve is compressed by clamp force to create form-fit engagement, then transverse force transmission is improved, but the inner sleeve experiences increased stress
Solution Approach 1:
The clamp force from the connector is localized to the contact portion at the end region of the inner sleeve, rather than distributing stress throughout the entire sleeve. This localized stress concentration at the contact portion achieves effective form-fit engagement for transverse force transmission while minimizing overall stress in the inner sleeve structure.
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 configuration enhances the security and efficiency of force transmission across suspension parts, reducing the reliance on frictional engagement and improving the overall stability and damping characteristics of the bearing arrangement.
Implementation Method 1
The elasticity of the rubber-elastic element allows movement between the two suspension parts to a limited extent. Defining an axial direction by the profile of the inner sleeve, axial, radial, tangential and unchanged movements are thus conceivable. The rubber-elastic element also prevents the transmission of vibrations
Implementation Method 2
A connector having a shaft portion extends through the inner sleeve wherein a clamp force of the connector presses the contact portion of the inner sleeve against the shaft portion
Data Source
AI summary
A bearing arrangement for connecting two components including a bearing bushing having an inner sleeve and an elastic element surrounding the inner sleeve. Two connection portions are arranged axially on both sides of the inner sleeve wherein a connector having a shaft portion extending through the inner sleeve applies a clamp force compressing the connection portions axially against the inner sleeve. The inner sleeve is deformed by the clamp force of the connector in such a manner that at least one contact portion of the inner sleeve presses radially to the inside and against the shaft portion.