Floating Disc Brake Anchor Layout for Outer Pad Wear and Noise
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Solution Overview
Problem
In floating type disc brakes, the outer pad is inclined due to uneven distribution of brake tangential force, 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 that directly or indirectly bears the brake tangential force on the outer pad, either through direct contact or via the yoke, with a design that includes a cantilever-shaped anchor on the cylinder and a convex arc-shaped cross-section to stabilize the yoke and distribute the force effectively.
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 inclined due to brake tangential force causing uneven wear and noise
Solution Approach 1:
An anchor member is introduced as an intermediary component between the fixing member and the outer pad. The anchor member receives the brake tangential force from the outer pad and transmits it to the fixing member, preventing the yoke from being inclined by the tangential force while maintaining the compact support structure.
Solution Approach 2:
The support structure is segmented into distinct functional components: the fixing member (support), the movable yoke, and the anchor member. This segmentation allows each component to perform its specific function - the fixing member provides stable mounting, the yoke enables axial movement, and the anchor member handles tangential force transmission.
2Reliability
If the yoke is made movable in axial direction to enable floating brake operation, then braking performance is improved, but the yoke becomes unstable under brake tangential force
Solution Approach 1:
The anchor member serves as a mediator that decouples the axial movement function from the tangential force resistance function. The yoke remains free to move axially for braking operation, while the anchor member independently handles the tangential force transmission to the fixing member.
Solution Approach 2:
The functional responsibilities are segmented between the yoke (axial movement) and the anchor member (tangential force resistance). This segmentation allows the yoke to maintain its mobility for effective braking while the anchor member provides the necessary stability against tangential forces.
3Force
If the anchor is positioned to bear brake tangential force within the circumferential range of the outer pad lining, then force distribution is optimized, but the structure becomes more complex
Solution Approach 1:
The anchor member is designed to perform multiple functions: it transmits tangential force to the fixing member, positions the outer pad circumferentially, and works in conjunction with the yoke's axial movement capability. This multi-functionality optimizes force distribution without proportionally increasing structural complexity.
Solution Approach 2:
The anchor member combines several functions into a single component: force transmission, positional constraint, and structural linkage. By merging these functions into one element rather than using separate components, the structure achieves optimized force distribution with minimal increase in complexity.
Data Source
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AI summary
An anchor (25) is provided in a cantilever manner to a cylinder (8a) which is fixed to a support (2a) so as to constitute a fixing member together with the support (2a). The outer end of the anchor (25) in axial direction is disposed between a pair of radial-direction projections (51a, 51b) which are formed at the outer peripheral edge of an outer pad (5a) supported by a yoke (3a). Thus, a brake tangential force applied to the outer pad (5a) is directly supported by the anchor (25) through abutment of the anchor (25) against the radial-direction projections (51a, 51b) provided to the outer pad (5a) during braking.