Brake Retraction Spring Layout for Parallel Pad Alignment
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Solution Overview
Problem
Existing brake assembly designs face challenges in efficiently retracting brake pad assemblies due to uneven force distribution and potential misalignment, leading to uneven wear and potential damage.
Innovation Solution
The brake assembly incorporates a retraction spring with biasing arms and tips that engage with backplates, providing uniform biasing forces to maintain parallel alignment and concentrate retraction force near the bottom of the backplates, where friction is greatest, thereby improving brake pad assembly retraction and preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional retraction spring designs are used, then brake pad retraction is achieved, but uneven force distribution occurs leading to misalignment and uneven wear
Solution Approach 1:
The retraction spring is divided into multiple biasing arms (first biasing arm, second biasing arm, etc.) that independently engage with different locations on the brake pad backplate. This segmentation allows each arm to apply force at specific points, ensuring uniform force distribution across the brake pad assembly and preventing misalignment during retraction.
Solution Approach 2:
The biasing arms are positioned to engage at specific locations on the backplate (e.g., near the bottom where friction is greatest), concentrating retraction force where it is most needed. This local quality approach ensures that force is applied precisely where it will most effectively maintain parallel alignment and overcome friction.
2Ease of manufacture
If retraction force is applied at single location, then assembly is simple, but misalignment and uneven wear occur
Solution Approach 1:
The spring assembly incorporates multiple biasing arms that engage at different locations on the backplate, transforming a single-point engagement design into a multi-point engagement system. This segmentation maintains relative assembly simplicity while dramatically improving alignment precision through distributed force application.
Solution Approach 2:
Multiple biasing arms are combined into a single integrated retraction spring assembly, allowing the system to achieve precise alignment through coordinated multi-point engagement while maintaining the simplicity of a unified component structure that can be installed as one unit.
3Ease of operation
If friction material is positioned away from bottom of backplate, then assembly is easier, but retraction efficiency decreases due to greatest friction at bottom
Solution Approach 1:
The biasing arms are specifically positioned to engage near the bottom of the backplate where friction forces are greatest during retraction. This local quality approach concentrates retraction force at the critical location, maximizing retraction efficiency while the friction material can be positioned optimally on the backplate face without compromising performance.
Solution Approach 2:
The retraction force application is moved to a different spatial dimension by engaging the biasing arms at the bottom edge of the backplate rather than requiring friction material positioning changes. This dimensional shift in force application location allows independent optimization of both friction material positioning and retraction efficiency.
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 uniform force distribution across the brake pad assemblies, maintaining parallel alignment and reducing the risk of misalignment, which can cause uneven wear and damage, thereby enhancing the retraction efficiency and longevity of the brake components.
Implementation Method 1
The retraction spring may be positioned between the first brake pad assembly and the second brake pad assembly such that the retraction spring applies biasing forces to the first brake pad assembly and the second brake pad assembly
Data Source
AI summary
A brake assembly having a retraction spring and a method of assembly. The retraction spring may extend between first and second brake pad assemblies. The retraction spring may include a coil and may have an end or tip that may be received in a hole in a backplate of a brake pad assembly.