Steering Rod Anti-Rotation Damping for Sensor Accuracy
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Solution Overview
Problem
Steer-by-wire type steering apparatuses experience noise and vibrations due to increased gaps between the anti-rotation member and housing caused by wear, leading to reduced accuracy of the rod position sensor.
Innovation Solution
A steering apparatus with a housing, sensor coupler, rotation preventer, damper, magnet holder, and sensing unit, where the damper is compressed between the sensor coupler and rotation preventer to absorb gaps and vibrations, and the magnet holder is designed to maintain sensor accuracy with a spherical fastener and support portions for stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the anti-rotation member is used to limit rotation of the rod, then the rod rotation is prevented, but gaps increase due to wear causing noise and vibrations
Solution Approach 1:
A damper is introduced as an intermediary component between the anti-rotation member and the housing. The damper absorbs the impact and wear between these components, preventing direct contact and the resulting noise and vibrations while maintaining the rotation limitation function.
Solution Approach 2:
The damper is pre-installed between the anti-rotation member and the housing to provide cushioning before wear occurs. This beforehand cushioning prevents impact and reduces noise and vibrations during operation, addressing the harmful effects before they can develop from wear.
2Stability of the object's composition
If the anti-rotation member limits rod rotation, then rotation is prevented, but sensor accuracy deteriorates due to increased gaps
Solution Approach 1:
The damper serves as a mediator that maintains the positional relationship between the anti-rotation member and the housing. By absorbing wear-induced gaps, the damper ensures the sensor continues to accurately measure rod position through the anti-rotation member without deterioration from increased gaps.
3Ease of operation
If the rod slides with rotation limited by the anti-rotation member, then steering function is achieved, but wear occurs increasing the gap
Solution Approach 1:
The damper is positioned between the anti-rotation member and the housing to intercept wear particles and absorb impact forces. This intermediary protection allows the rod to slide freely for steering operation while preventing the wear that would otherwise increase gaps and compromise reliability.
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 effectively minimizes noise and vibrations, maintains sensor accuracy by compensating for wear-induced gaps, and prevents deterioration of steering precision.
Implementation Method 1
a damper coupled to the rotation preventer to be disposed between the sensor coupler and the rotation preventer
Data Source
AI summary
Disclosed herein is a steering apparatus. According to one aspect of the present disclosure, the steering apparatus includes a housing in which a rod slidably provided in an axial direction for wheel steering is accommodated and a sensor coupler passing through an inner surface and an outer surface to expose a part of the rod is provided, a rotation preventer coupled to the rod through the sensor coupler to be moved together with the rod and supported in a width direction of the housing to limit rotation of the rod, a damper coupled to the rotation preventer to be disposed between the sensor coupler and the rotation preventer, a magnet holder coupled to the rotation preventer to be moved together with the rod and provided with a magnet, and a sensing unit coupled to the sensor coupler and including a sensor configured to sense a position of the magnet.