Steering Rotation Limiting Device Assembly Simplification
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Solution Overview
Problem
Existing rotation limiting devices for steer-by-wire type steering systems are complex to assemble due to separate components that need to be integrated around the steering shaft.
Innovation Solution
A rotation limiting device comprising a first member, a second member, at least one intermediate member, and a rotation support mechanism, allowing for preassembly and easy attachment between a rotation member and a fixed portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate components (first rotation member, second rotation member, housing) are used to limit rotation in steer-by-wire systems, then rotation limitation function is achieved, but assembly complexity increases and component management becomes difficult
Solution Approach 1:
The patent combines the first rotation member, second rotation member, and housing into a single integrated rotation limiting device. This merging of previously separate components into one unified structure achieves the rotation limitation function while significantly reducing assembly complexity and improving component management.
2Ease of operation
If multiple separate components are used for rotation limitation, then rotation control is achieved, but manufacturing and assembly processes become more complex
Solution Approach 1:
By integrating the housing, first rotation member, and second rotation member into a single manufactured unit, the patent simplifies the manufacturing process. The integrated design allows for more straightforward production and assembly compared to managing multiple separate components, while maintaining the same rotation control functionality.
3Reliability
If separate rotation members are used around the steering shaft, then rotation limiting is achieved, but the number of parts increases making management difficult
Solution Approach 1:
The patent reduces the number of separate components by merging the housing, first rotation member, and second rotation member into a single integrated rotation limiting device. This consolidation maintains the rotation limiting function while significantly reducing the total number of parts that need to be managed, stored, and assembled.
Data Source
AI summary
A rotation limiting device includes: a first member having a first protrusion; a second member having a second protrusion disposed on an axial one side with respect to the first protrusion, the second member being disposed around the first member and configured to rotate relative to the first member; at least one intermediate member, disposed between the first member and the second member in a radial direction and supported in a relatively rotatable manner with respect to the first and the second members, including a side plate portion, an intermediate side first protrusion protruding from an axial other side surface of the side plate portion, and an intermediate side second protrusion protruding from an axial one side surface of the side plate portion; and a rotation support mechanism configured to support the second member around the first member in a relatively rotatable manner with respect to the first member.