Disc Brake Pad Clip Structure for Stable Pad Retention
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Solution Overview
Problem
Existing pad clips for disc brake devices with circumferential bridges face interference issues, making it difficult to apply them without compromising the braking performance and stability.
Innovation Solution
A pad clip made of a metal plate, designed to elastically press a pair of pads and attach to a caliper with a central bridge, end bridges, and a circumferential bridge, ensuring stable application of pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pad clip is provided between the end bridge and the central bridge to prevent pad rattling, then pad stability is improved, but interference occurs between the circumferential bridge and the pad clip making it difficult to apply
Solution Approach 1:
The pad clip is divided into multiple functional portions: a main body portion, first fixing portions that press against the central bridge, and a second fixing portion that presses against the end bridge. This segmentation allows each portion to be optimized for its specific function while avoiding interference with the circumferential bridge
Solution Approach 2:
Different portions of the pad clip have different properties: the main body portion is made of elastic material to provide pressing force, while the fixing portions are designed with specific pressing surfaces to engage with the bridges. This local differentiation enables the pad clip to function effectively without interfering with the circumferential bridge structure
2Force
If the inner body and outer body are elastically deformed to apply braking force, then braking performance is achieved, but rigidity of the caliper is reduced leading to deteriorated braking feeling
Solution Approach 1:
The caliper is constructed as a composite structure combining the inner body, outer body, central bridge, end bridges, and circumferential bridge. This composite structure distributes the braking forces and elastic deformations across multiple components, maintaining overall rigidity while enabling the necessary elastic deformation for braking force application
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 pad clip effectively stabilizes the pressing force on the pads, enhancing braking performance and preventing rattling during non-braking conditions, while also being compatible with disc brake devices featuring circumferential bridges.
Implementation Method 1
a pad clip made of a metal plate and configured to elastically press a pair of pads
Data Source
AI summary
A pad clip for a disc brake device includes a main body portion elastically supported between a central bridge and an end bridge; and a pair of pad pressing portions configured to press outer circumferential edge portions of a pair of pads toward a radially inner side. A radially outer side surface of the main body portion is configured to be pressed against a radially inner side surface of a circumferential bridge by an elastic force of the pair of pad pressing portions.