Non-Circular Bearing Unit Anti-Rotation Design
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Solution Overview
Problem
Existing bearing units for commercial vehicle axle systems face challenges such as high installation forces, risk of damage to elastically deformable materials, overheating, and increased wear due to twisting movements between bearing elements and bearing eyes.
Innovation Solution
A bearing unit design featuring a holding element, a sleeve element, and a bearing element with a non-circular shape and specific recesses, where the bearing element is resiliently mounted and secured via a screw-nut connection to prevent twisting, and the sleeve element is fixed to prevent displacement, ensuring a non-positive connection and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bearing elements are pressed into circular bearing eyes with high forces, then the bearing element can be fixed in the bearing eye, but the elastically deformable material of the bearing element is at risk of damage and requires hydraulic tools for installation
Solution Approach 1:
The patent employs a non-circular bearing eye cross-section (e.g., oval, rectangular, or polygonal) instead of a circular one. This asymmetric shape creates a geometric interference fit that prevents rotation and eliminates the need for high pressing forces during installation, while still providing secure fixation of the bearing element.
Solution Approach 2:
Instead of forcing the bearing element into a circular bearing eye with high pressure, the patent inverts the approach by using a non-circular bearing eye shape that naturally provides both fixation and anti-rotation functionality through its geometry, thereby avoiding the need for excessive installation forces.
2Ease of manufacture
If circular bearing eyes and bearing elements are used, then the bearing element can be installed, but the bearing eye and bearing element can rotate in relation to one another causing overheating and abrasive wear
Solution Approach 1:
The non-circular cross-section of the bearing eye (such as oval, rectangular, or polygonal shapes) creates a unique geometric interface with the bearing element. This asymmetric geometry prevents relative rotation between the bearing eye and bearing element, thereby eliminating abrasive wear and overheating while maintaining simple installation procedures.
3Strength
If high forces are applied to press the bearing element into the bearing eye, then the bearing element can be fixed, but the installation process becomes complex requiring hydraulic tools
Solution Approach 1:
The non-circular bearing eye cross-section creates a geometric interference fit that provides strong fixation without requiring high pressing forces. This allows the bearing element to be installed using simple manual tools or even by hand, eliminating the need for complex hydraulic installation equipment while maintaining secure fixation.
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 simplifies assembly, reduces the risk of damage and wear, and prevents overheating by ensuring a secure, non-positive connection between the bearing element and the holding element, enhancing the durability and reliability of the bearing unit.
Implementation Method 1
the bearing element being resiliently mounted via the bearing element in the plane E relative to the holding element
Data Source
Figure 1a~1d
Figure 2a~2b
AI summary
A bearing unit, in particular for axle systems of commercial vehicles, comprising a holding element, a sleeve element and a bearing element, wherein the holding element has a first engagement region which is designed in order substantially to enclose the bearing element in one plane, wherein the bearing element has a first recess which is directed transversely with respect to the plane and in which the sleeve element is arranged, wherein the sleeve element is mounted resiliently in the plane relative to the holding element via the bearing element, wherein the holding element has a second engagement region, in which a fixing element engages, in order to fix the first engagement region frictionally on the bearing element, and wherein the first fastening region and/or the bearing element have/has a non-circular shape such that a rotational movement of the bearing element relative to the holding element is prevented.