Brake Pad Shim With Lateral Heat Dissipation for Brake Fluid Protection
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Solution Overview
Problem
Existing brake pad assemblies in vehicle disc brakes suffer from inefficient heat management, leading to non-uniform heating, deformation, and potential heat transfer to brake fluid, which poses safety risks and generates acoustic noise.
Innovation Solution
A brake pad assembly with a shim featuring laterally protruding heat dissipation portions that redirect and dissipate heat laterally, increasing the surface area for heat dissipation and preventing heat from reaching the brake fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat is conducted along the displacement axis towards the brake piston, then heat transfer to brake fluid occurs, but this poses safety risks
Solution Approach 1:
The shim incorporates localized heat dissipation portions with different thermal conductivity properties in specific regions. These portions are strategically positioned to redirect heat flow laterally away from the brake piston, creating non-uniform heat distribution that prevents heat transfer to brake fluid while maintaining effective heat dissipation.
Solution Approach 2:
The invention transitions heat flow from a one-dimensional path (along the displacement axis towards the brake piston) to a two-dimensional lateral distribution pattern. The heat dissipation portions extend in the radial direction and distribute heat laterally across the shim's surface, redirecting heat away from the axial path that would lead to the brake fluid.
2Temperature
If conventional shim design is used, then结构简单性 is maintained, but heat dissipation efficiency is insufficient
Solution Approach 1:
The shim is segmented into distinct functional zones: a base portion for structural support and heat conduction, and protruding heat dissipation portions for lateral heat distribution. This segmentation allows each zone to perform its specific function optimally while maintaining overall structural integrity.
Solution Approach 2:
The heat dissipation portions are integrated as protrusions from the main shim body, forming a nested structure where the lateral extensions are part of the single-piece shim component. This nesting approach adds heat dissipation functionality without requiring separate components or complex assembly.
3Stability of the object's composition
If heat is distributed uniformly within brake components, then stress and deformation are generated, but non-uniform heating occurs
Solution Approach 1:
The shim creates intentionally non-uniform heat distribution through its heat dissipation portions, which are positioned to channel heat laterally in specific directions. This localized heat management prevents uniform heating that would cause thermal expansion and deformation, instead creating controlled temperature gradients that maintain component 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 shim effectively dissipates heat away from the brake fluid, reducing deformation and noise, while maintaining a lightweight and cost-effective design.
Implementation Method 1
the shim may be configured to conduct significant amounts of heat received from the backplate and especially the friction material in a lateral direction
Implementation Method 2
the heat dissipation portion may define a large surface that is in contact with air. For example, said protruding part may form a free end of the heat dissipation portion that does not contact any further components. This way, significant amounts of heat can be emitted into the surroundings
Implementation Method 3
significant amounts of heat can be emitted into the surroundings
Data Source
AI summary
The invention relates to a shim and to a brake pad assembly for a vehicle disc brake, wherein the vehicle disc brake comprises a brake disc that is configured to rotate about a rotation axis and the brake pad assembly comprises:a backplate that is configured to carry a friction material lining at its front face for contacting the brake disc;a shim that is arranged at a rear face of the backplate;wherein the shim has a radially upper edge and a radially lower edge and the radially upper edge and the radially lower edge are connected by two opposite side portions of the shim;wherein the shim has at least one laterally protruding heat dissipation portion that is comprised by one of the side portions and that protrudes past a side edge of the backplate.