Floating Disc Brake Anchor Layout to Prevent Outer Pad Wear
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Solution Overview
Problem
In floating type disc brakes, the outer pad is prone to inclination due to uneven distribution of brake tangential forces, leading to uneven wear and noise during braking, as the yoke supporting the outer pad is not effectively stabilized by the brake tangential force.
Innovation Solution
The introduction of an anchor mechanism that directly or indirectly bears the brake tangential force on the outer pad, using a cantilever-shaped anchor integrated with the cylinder or support, which is positioned to overlap with the circumferentially central portion of the outer pad, ensuring stable abutment and distribution of forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the outer pad is supported directly by the yoke to reduce support size and weight, then the support structure becomes more compact, but the yoke becomes prone to inclination under brake tangential force causing uneven wear and noise
Solution Approach 1:
The support structure is segmented into two independent components: the yoke that supports the outer pad and enables axial movement, and the anchor that is fixed to the support to bear brake tangential force. This segmentation allows each component to perform its specific function optimally - the yoke remains lightweight and movable while the anchor provides stable force bearing, resolving the contradiction between weight reduction and stability.
Solution Approach 2:
The anchor acts as an intermediary element between the support and the brake tangential force. Instead of the yoke directly bearing the tangential force (which causes inclination), the anchor intercepts and bears this force through its abutment with the outer pad or yoke. This intermediary structure transfers the tangential force to the fixed support without causing yoke inclination, maintaining stability while preserving the direct support configuration.
2Device complexity
If the abutment portions are positioned at axially inner side while brake tangential force acts at outer side, then the yoke structure simplifies, but the yoke inclines under braking force causing uneven pad wear
Solution Approach 1:
The force-bearing function is extracted from the yoke structure and assigned to the separate anchor component. The anchor is positioned to abut the outer pad or yoke at a location that directly counteracts the brake tangential force, removing the inclination problem from the yoke. This extraction allows the yoke to maintain its simple structure while the anchor ensures uniform pad wear by preventing yoke inclination during braking.
3Stability of the object's composition
If the anchor is positioned to bear brake tangential force within circumferential range of outer pad lining, then yoke inclination is prevented, but the anchor structure becomes more complex
Solution Approach 1:
The anchor is merged with either the outer pad or the yoke as an integrated component rather than being a completely separate assembly. This merging reduces the overall device complexity by eliminating additional fastening and positioning mechanisms, while still providing the necessary function of bearing brake tangential force to prevent yoke inclination. The anchor becomes a unified part of the existing structure, achieving stability without excessive complexity.
Data Source
AI summary
A floating disc brake includes an outer pad disposed on an axially outer side relative to a rotor, an inner pad disposed on an axially inner side relative to the rotor, a fixing member disposed on the axially inner side relative to the rotor, the fixing member being configured to support the inner pad to be movable in an axial direction and being fixed to a vehicle body, and a yoke supported to the fixing member by a slide pin to be movable in the axial direction, the yoke supporting the outer pad. The fixing member is provided with an anchor disposed on a radially outer side relative to the rotor, the anchor being configured to bear a brake tangential force that acts on the outer pad at the time of braking within a circumferential range of a lining constituting the outer pad.