Resin Wheel Speed Sensor Bracket for Bolt Loosening Prevention
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Solution Overview
Problem
Conventional wheel speed sensor brackets with metal tubular components are costly and prone to bolt loosening due to corrosion, requiring high tightening torque to prevent buckling.
Innovation Solution
A bracket made of synthetic resin with a collapsible portion along the insertion hole's circumference, featuring multiple hole portions and a ring-shaped design that expands with bolt tightening, ensuring a reliable contact area and preventing loosening without the need for metal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a tubular component made of metal is formed through insert molding to ensure bolt bearing strength, then the bolt bearing surface strength is improved, but the manufacturing cost increases
Solution Approach 1:
The invention changes the material parameter from metal to synthetic resin, and introduces a collapsible portion structure that changes shape under bolt tightening force. This allows the resin bracket to achieve sufficient bolt bearing surface strength through structural design rather than relying on expensive metal materials, thereby reducing manufacturing cost while maintaining strength requirements
Solution Approach 2:
The bracket incorporates a collapsible portion that dynamically changes shape during bolt tightening. The collapsible portion deforms under the bolt head's pressure and then maintains the deformed state, providing sustained bearing force. This dynamic structural change enables the resin material to achieve performance comparable to metal without the associated cost
2Strength
If a tubular component made of metal is used to prevent buckling under high tightening torque, then the buckling resistance is improved, but the manufacturing cost increases
Solution Approach 1:
The collapsible portion provides dynamic structural adjustment during bolt tightening. As the bolt is tightened, the collapsible portion deforms to absorb and distribute the tightening torque, preventing buckling of the bracket. This dynamic response eliminates the need for expensive metal components while maintaining buckling resistance
Solution Approach 2:
The invention changes from rigid metal material to flexible resin material with collapsible structure. The collapsible portion's ability to deform and recover provides the necessary buckling resistance that would otherwise require high-strength metal, thereby reducing manufacturing cost
3Reliability
If the tightening torque is increased to prevent bolt loosening due to insufficient contact area, then the bolt loosening prevention is improved, but the risk of bracket damage increases
Solution Approach 1:
The collapsible portion dynamically adjusts the contact area between the bracket and bolt head during tightening. As the bolt is tightened, the collapsible portion deforms to increase the contact area, distributing the tightening torque and preventing both bolt loosening and bracket damage. This eliminates the need to over-tighten the bolt
Solution Approach 2:
The collapsible portion is pre-designed to deform in a controlled manner during bolt tightening, preliminarily preparing the contact surface to ensure adequate contact area. This preliminary structural adjustment prevents the need for excessive tightening torque, thereby protecting the bracket from damage while ensuring bolt security
4Reliability
If the bolt bearing surface is made of metal to ensure durability, then the anti-corrosion performance is improved, but the manufacturing cost increases
Solution Approach 1:
The invention changes the material parameter from metal to synthetic resin for the entire bracket including the bolt bearing surface. Synthetic resin inherently provides corrosion resistance without the need for metal materials or protective coatings, thereby maintaining anti-corrosion performance while reducing manufacturing cost
Solution Approach 2:
The invention uses cost-effective synthetic resin material that provides sufficient durability and corrosion resistance for the application. The resin bracket with collapsible portion offers a economical alternative to expensive metal components while maintaining the necessary service life and 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 collapsible resin bracket effectively prevents bolt loosening with reduced tightening torque and eliminates corrosion issues, achieving cost savings and reliable fixation without metal components.
Implementation Method 1
a collapsible portion that is provided along a circumferential direction of the insertion hole on a side opposite to the fixing portion, and that is collapsed in accordance with tightening of the bolt
Data Source
AI summary
The present disclosure provides a bracket for a wheel speed sensor, and a wheel speed sensor, which can be obtained at low cost and can prevent a bolt from loosening. A bracket capable of fixing a wheel speed sensor for detecting a wheel speed to a fixing portion of a vehicle includes: a main body portion made of synthetic resin through which an insertion hole that allows insertion of a bolt that is to be fixed to the fixing portion, and an attachment hole that allows insertion of a wheel speed sensor assembly are formed; and a collapsible portion that is provided along a circumferential direction of the insertion hole on a side opposite to the fixing portion, and that is collapsed in accordance with tightening of the bolt.