Multi-Layer Brake Pad Backing Plate for Friction Material Retention

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Solution Overview

Problem

Existing automotive brake pads face challenges in retaining friction material effectively, leading to reduced brake pad lifespan and performance.

Innovation Solution

A multi-layered backing plate design comprising a reinforcement plate and a locking plate with strategically aligned mold holes and locking holes, creating an undercut configuration to mechanically lock the friction material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional single-layer backing plate design is used, then manufacturing is simple, but friction material retention is insufficient

Engineering Contradiction:

Improvefriction material retentionVSAvoidbacking plate structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The backing plate is divided into two separate layers: a reinforcement plate providing structural support and a locking plate creating retention features. This segmentation allows each layer to specialize in its function, with the locking plate forming undercut configurations that mechanically interlock with friction material while the reinforcement plate maintains overall structural integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The locking plate is positioned between the friction material and the reinforcement plate, creating a nested three-layer structure. The locking plate's undercut features are formed by the alignment of mold holes in the reinforcement plate with locking holes in the locking plate, creating an interlocking mechanism that retains friction material while maintaining a compact overall structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Duration of action of stationary object

If mechanical locking features are added to retain friction material, then brake pad lifespan is prolonged, but manufacturing complexity increases

Engineering Contradiction:

Improvebrake pad lifespanVSAvoidbacking plate manufacturing

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The undercut retention features are pre-formed during the backing plate manufacturing process by aligning mold holes in the reinforcement plate with locking holes in the locking plate. This preliminary formation of locking features eliminates the need for additional post-manufacturing steps to create retention mechanisms, allowing friction material to be directly pressed and locked into place during assembly.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The manufacturing process combines the formation of retention features with the backing plate assembly process itself. The alignment of mold and locking holes creates undercuts that are formed during the pressing operation that also attaches the friction material, merging the creation of locking features with the friction material installation in a single operational step.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12264715B2Brake pad backing plate

Publication Date: 2025.04.01 FEDERAL MOGUL MOTORPARTS LLC

AI summary

A backing plate for a brake pad that helps improve attachment of the friction pad. The backing plate has a multi-layered structure including a locking plate and a reinforcement plate. Locking holes or locking rings in the locking plate create an undercut portion at mold holes in the reinforcement plate to help mechanically lock the friction material of the brake pad. In some embodiments, retention holes and/or locking rails can be provided to help further retain the friction pad by increasing the available surface area for bonding. Additionally, the retention holes and/or locking rails can help decrease the weight of the backing plate by minimizing the overall size of the locking plate.