Brake Pad Backing Plate Locking Mechanism
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Solution Overview
Problem
Existing brake pad designs face challenges in securely attaching friction pads to backing plates without altering the overall configuration, leading to potential bending and noise issues due to rigid attachments and inadequate noise vibration and harshness (NVH) performance.
Innovation Solution
A multi-layered backing plate design comprising a reinforcement plate and a retention plate with locking projections and dampening layers, allowing for independent expansion and contraction, improved adhesion, and enhanced NVH performance, while maintaining the standard size and configuration of the backing plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid attachment method is used to secure the friction pad to the backing plate, then the attachment strength is improved, but bending and noise issues occur due to inadequate flexibility
Solution Approach 1:
A dampening layer comprising a flexible polymer material is positioned between the retention plate and the friction pad. This flexible layer allows for independent expansion and contraction of the retention plate and friction pad, reducing bending and noise while maintaining attachment strength through shear retention.
2Strength
If the overall configuration of the backing plate is altered to improve attachment, then attachment performance is improved, but the caliper design compatibility is reduced
Solution Approach 1:
The backing plate is divided into multiple functional layers: a reinforcement plate that maintains the standard configuration for caliper compatibility, and a retention plate with locking projections that provide enhanced attachment performance. This segmentation allows each layer to perform its specific function without compromising the other.
Solution Approach 2:
The backing plate assembly combines different materials and structures - the reinforcement plate provides structural integrity and standard configuration, while the retention plate with locking projections and dampening layer provides enhanced attachment. This composite approach improves attachment performance while maintaining compatibility with existing caliper designs.
3Object-affected harmful factors
If a multi-layered design with dampening layer is used, then NVH performance is improved, but the device complexity increases
Solution Approach 1:
The dampening layer is integrated between the retention plate and friction pad, combining noise vibration and harshness dampening functionality with the attachment mechanism in a single integrated assembly. This merging approach improves NVH performance while minimizing additional complexity.
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 multi-layered design enhances the attachment and performance of brake pads by promoting shear retention, reducing weight, and improving NVH characteristics, thereby extending the life and performance of the brake pads.
Implementation Method 1
a dampening layer between the reinforcement plate and the retention plate
Implementation Method 2
a locking projection that cooperates with the mold hole of the reinforcement plate to mechanically lock the retention plate to the reinforcement plate
Data Source
AI summary
A backing plate and associated brake pad that includes a reinforcement plate and a retention plate. The reinforcement plate has an outboard surface, an inboard surface, and a mold hole. The retention plate has an outboard surface, an inboard surface, and a locking projection that cooperates with the mold hole of the reinforcement plate to mechanically lock the retention plate to the reinforcement plate so that the inboard surface of the reinforcement plate faces the outboard surface of the retention plate. A dampening layer may be included between the reinforcement plate and the retention plate.