Asymmetric Brake Pad Liner Structure for Drag Torque and Rattle
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Solution Overview
Problem
Existing brake pad liners for brake apparatuses suffer from drag torque and rattle noise issues due to improper sliding of brake pads and fluctuations in pressurization force.
Innovation Solution
A pad liner design featuring a pad liner body with extended pad liner supports, a pad liner return part that pressurizes and restores the first brake pad, and a pad liner extension part that pressurizes the second brake pad, with the extension part disposed below the return part to ensure proper sliding and fixation of brake pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pad liner pressurizes both brake pads symmetrically, then the braking force is balanced, but the brake pads cannot slide properly causing drag torque
Solution Approach 1:
The pad liner is divided into two distinct functional parts: a pad liner return part for restoring the first brake pad, and a pad liner extension part for pressurizing the second brake pad. This segmentation allows asymmetric pressurization where only the second brake pad is pressurized by the extension part, enabling proper sliding while maintaining braking balance through the combined action of both parts.
Solution Approach 2:
The pad liner adopts an asymmetric structure where the extension part is disposed on a side lower than the return part, and the second brake pad is firmly fixed while the first brake pad slides smoothly. This asymmetric configuration resolves the contradiction by allowing differential pressurization - the return part restores the first pad without excessive pressurization, while the extension part pressurizes the second pad to prevent sliding, achieving both balanced braking and proper slide control.
2Stability of the object's composition
If the pad liner pressurization force is increased to prevent brake pad movement, then braking stability improves, but rattle noise occurs when pressurization is weakened
Solution Approach 1:
Different regions of the pad liner are designed with different functions and pressurization characteristics. The return part is designed to restore the first brake pad with elastic restoring force, while the extension part is designed to firmly fix the second brake pad through pressurization. This local differentiation allows each brake pad to have optimized pressurization - the first pad can slide smoothly during braking while the second pad remains firmly positioned, preventing rattle noise without excessive overall pressurization.
3Ease of manufacture
If the pad liner structure is simplified to reduce manufacturing cost, then production efficiency increases, but drag torque and rattle noise cannot be prevented
Solution Approach 1:
The pad liner combines multiple functions into a single integrated component: it includes the return part for restoring the first brake pad, the extension part for pressurizing the second brake pad, and the body connecting both parts. This merged structure prevents drag torque and rattle noise through its asymmetric configuration while remaining manufacturable as a single piece, avoiding the need for complex multi-component assemblies.
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 design effectively prevents drag torque and rattle noise by ensuring the first brake pad slides smoothly and the second brake pad is firmly fixed, enhancing braking performance and reducing noise.
Implementation Method 1
a pad liner return part connected to the pad liner body and configured to pressurize a first brake pad, come into contact with the first brake pad, and restore the first brake pad to its original state by providing an elastic restoring force thereof upon release of braking
Implementation Method 2
a pad liner extension part connected to the pad liner body, configured to come into contact with a second brake pad and pressurize the second brake pad, and disposed on a side lower than the pad liner return part
Implementation Method 3
a pad liner coupling part bent and extended from the second pad liner extension part to a caliper body and fit into a coupling groove part of the caliper body by an elastic force thereof
Data Source
AI summary
A pad liner for a brake apparatus according to the present disclosure includes a pad liner body disposed between a pair of pin members, a pair of pad liner supports extended and formed from both ends of the pad liner body, respectively, and configured to support a pair of pin members, respectively, a pad liner return part connected to the pad liner body and configured to pressurize a first brake pad, come into contact with the first brake pad, and restore the first brake pad to its original state by providing an elastic restoring force thereof upon release of braking, and a pad liner extension part connected to the pad liner body, configured to come into contact with a second brake pad and pressurize the second brake pad, and disposed on a side lower than the pad liner return part.