Offset Groove Guide Pin for Disc Brake Alignment
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Solution Overview
Problem
Conventional disc brake assemblies face challenges in achieving optimal alignment and contact between guide pins and anchor brackets, leading to inefficient braking performance due to lack of precise positioning and biased contact points.
Innovation Solution
The introduction of a guide pin with an offset groove and a resilient annular bushing or member, such as rubber, which biases the guide pin within the bore, creating a defined point of contact that enhances alignment and reduces friction, allowing for improved sliding support and braking efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional guide pin is used in the anchor bracket, then the structure is simple, but the alignment and contact between guide pin and anchor bracket are imprecise, leading to inefficient braking performance
Solution Approach 1:
The guide pin incorporates an offset groove whose axis is offset from the central axis of the guide pin. This asymmetric feature allows the resilient member to bias the guide pin laterally, creating a defined point of contact that improves alignment precision between the guide pin and anchor bracket bore.
Solution Approach 2:
A resilient member (such as a rubber bushing or spring) is introduced as an intermediary element within the offset groove. This mediator biases the guide pin to achieve precise positioning and optimal contact with the anchor bracket bore, resolving the alignment issue without requiring complex machining of the guide pin itself.
2Reliability
If the guide pin is simply inserted into the bore, then the installation is easy, but there is no defined point of contact, resulting in poor braking performance
Solution Approach 1:
The offset groove is pre-formed in the guide pin during manufacturing, and the resilient member is pre-installed within this groove. This preliminary preparation ensures that when the guide pin assembly is installed in the anchor bracket bore, the defined point of contact is automatically achieved without requiring additional adjustment or complex assembly procedures.
3Area of stationary object
If a standard guide pin without offset groove is used, then the contact area is small, but the structure remains simple
Solution Approach 1:
The offset groove creates an asymmetric configuration that, when combined with the resilient member, positions the guide pin to achieve optimal contact with the anchor bracket bore. This asymmetric design effectively increases the functional contact area at the defined point of contact while maintaining relatively simple overall structure.
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
This configuration ensures precise positioning and increased contact area between the guide pin and the anchor bracket, enhancing the braking performance by providing a spring-like bias that maintains optimal contact, thereby improving the overall braking efficiency and stability.
Implementation Method 1
a resilient annular bushing or member, such as rubber, which biases the guide pin within the bore, creating a defined point of contact
Data Source
AI summary
A disc brake assembly having a guide pin disposed in a bore of an anchor bracket such that a guide pin axis is offset relative to a bore axis whereby there is provided at least one defined point of contact between only a portion of the guide pin and a portion of an inner surface of the bore. The guide pin includes a groove formed therein, the groove defines a groove axis which is offset relative to the guide pin axis, and a resilient member is disposed in the groove which is operative to bias the guide pin in the bore such that the guide pin axis is offset relative to bore axis to provide the at least one defined point of contact between only a portion of the guide pin and a portion of the inner surface of the bore.