Disk Brake Pad Guide Protrusion Geometry for Squeal Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing brake pad systems for disk brakes often fail to effectively suppress squeal noises, particularly during backwards braking and on rough roads, due to relative motion between components leading to unwanted noise and vibration, and existing solutions are not universally effective across various braking conditions.
Innovation Solution
A brake pad design featuring a back plate with a guiding protrusion and bulging portion that reduces the gap width between the brake pad and carrier, providing a well-defined contact area and minimizing relative motion, thereby reducing noise through controlled contact and friction forces, without increasing mass or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a steel shim is glued to the back plate to suppress squeal noises, then noise suppression is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the steel shim component from the brake pad assembly. Instead of adding a separate noise suppression component, the solution modifies the back plate geometry itself to achieve noise reduction, thereby simplifying the overall structure and reducing manufacturing complexity
Solution Approach 2:
The invention applies local quality modification by creating a specific geometric feature (the bulging portion) at a localized area of the back plate. This localized geometric change alters the contact characteristics and dynamic behavior precisely where needed, without requiring additional components across the entire brake pad structure
2Object-affected harmful factors
If additional massive bodies are added to components to reduce noise, then noise suppression is improved, but the mass of the brake pad assembly increases
Solution Approach 1:
The invention changes the geometric parameters of the back plate by introducing a bulging portion with specific dimensions. This parameter modification alters the contact area and pressure distribution, achieving noise suppression through geometric optimization rather than adding mass, thus maintaining the lightweight characteristic of the brake pad
3Stability of the object's composition
If the contact area between brake pad and carrier is increased to improve stability, then stability is improved, but relative motion control and noise reduction are worsened
Solution Approach 1:
The invention creates a localized bulging portion on the back plate that provides a defined contact point with the carrier. This localized contact feature maintains stability through precise geometric contact while minimizing the overall contact area, thereby reducing the sliding surface that generates squeal noise during relative motion
Solution Approach 2:
The bulging portion introduces a curved geometric feature on the back plate surface. This curvature creates a specific contact characteristic with the carrier that provides stability through point or line contact rather than large surface contact, reducing friction and noise during axial relative motion while maintaining positional stability
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 brake pad design effectively suppresses squeal noises, clicking noises, and rattle by enhancing control over relative motion and contact areas, improving dynamic behavior and noise reduction without the need for additional mass or cost, and maintaining robustness throughout wear.
Implementation Method 1
The bulging portion is configured to extend toward a guiding surface of the guiding recess of the carrier to reduce a gap width between the guiding protrusion of the back plate in the region of the bulging portion and an adjacent part of the disk brake system
Data Source
AI summary
The application relates to a brake pad (2) for a disk brake system and to a disk brake system. The proposed brake pad (2) comprises a back plate (5) having a front side (4) for facing a brake disk (1) of the disk brake system and a friction layer (3) arranged on the front side (4) of the back plate (5) for contacting a friction surface of the brake disk (1). The back plate (5) comprises a guiding protrusion (9) configured to be slidably received within a guiding recess (14) of a carrier (13) of the disk brake system. The guiding protrusion (9) of the back plate (5) comprises a bulging portion (10). The bulging portion (10) is configured to extend toward a guiding surface (15) of the guiding recess (14) of the carrier (13) to reduce a gap width between the guiding protrusion (9) of the back plate (5) in the region of the bulging portion (10) and an adjacent part of the disk brake system.