Elastic Steering Shaft Bearing for Simpler Column Assembly
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Solution Overview
Problem
The existing processes for assembling a steering apparatus are complex and require multiple parts, including O-rings, which complicate machining and increase the weight of the apparatus.
Innovation Solution
A bearing with an inner ring, outer ring, and roller, where the inner ring and outer ring are made of a plastic-containing material, simplifies machining processes and reduces the number of parts by eliminating the need for O-rings and allowing for elastic deformation during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal bearing is used with traditional assembly processes, then the bearing provides strong support and durability, but the assembly process becomes complex and requires multiple additional parts
Solution Approach 1:
The patent combines multiple functions into the bearing itself: the expanded portion integrates the bearing support function and the positioning function that previously required separate O-rings. The groove structures are directly formed on the bearing outer ring, eliminating the need for separate positioning components and simplifying the assembly process while maintaining reliable support.
Solution Approach 2:
The bearing is designed to perform multiple functions simultaneously: it provides rotational support, positions the shaft through integrated expanded portions, and includes built-in groove structures for sealing or retention purposes. This multi-functionality reduces the total number of parts needed in the assembly.
2Reliability
If O-rings and groove machining are added to ensure smooth coupling, then the coupling reliability improves, but the number of parts and machining steps increases
Solution Approach 1:
The groove structures are integrated directly into the bearing outer ring as a single component feature rather than requiring separate O-rings and separate groove machining operations on the shaft. This merging reduces the number of discrete parts and simplifies the manufacturing process while ensuring reliable coupling.
3Strength
If traditional metal bearing with multiple components is used, then the bearing provides strong structural support, but the weight of the steering apparatus increases
Solution Approach 1:
The patent employs a composite structure where the bearing includes a plastic-containing material in combination with metal components. This composite approach reduces the overall weight compared to traditional all-metal bearings while maintaining the necessary structural support and load-bearing capabilities through the synergistic properties of the composite materials.
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 proposed solution simplifies the assembly process, reduces the weight of the steering apparatus, and eliminates the need for complex machining steps, thereby enhancing efficiency and reducing costs.
Implementation Method 1
the inner ring and outer ring are made of a plastic-containing material, simplifies machining processes and reduces the number of parts by eliminating the need for O-rings and allowing for elastic deformation during assembly
Data Source
AI summary
A bearing is disposed between a steering shaft and an inner column covering at least a part of the steering shaft. The bearing includes: an inner ring supporting an outer circumference of the steering shaft and having an elastically deformable material such as a plastic-containing material; an outer ring of which at least a part faces an inner circumference of the inner column; and a roller rotatably disposed between the inner ring and the outer ring. The bearing may be included in a steering apparatus.