Brake Shoe Claw Geometry to Prevent Friction Member Detachment
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Solution Overview
Problem
Conventional brake shoes for vehicles face issues where the friction member can become detached from the base plate due to insufficient fixing force, especially when subjected to rotational forces during braking.
Innovation Solution
The brake shoe design incorporates a base plate with claws that are bent or curved away from the support surface, providing a stronger fixing force by distributing rotational forces and preventing the friction member from detaching, with optional features like a curved support surface and multiple claw configurations for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If claws are bent and extend straight and obliquely relative to the support surface, then the structure is simple, but the fixing force of the friction member to the base plate is insufficient
Solution Approach 1:
The claws are configured to be bent or curved at a position away from the support surface, creating a curved geometry that increases the fixing force. This curvature allows the claws to better engage with and hold the friction member, preventing detachment during braking while maintaining manufacturing simplicity through cutting and bending processes.
2Force
If the friction member is held firmly between the support surface and the claws, then the fixing force increases, but the risk of damage to the friction member during braking increases
Solution Approach 1:
The curved configuration of the claws creates localized engagement points that distribute the holding force more evenly across the friction member. This localized quality improvement allows the claws to firmly hold the friction member while reducing stress concentration that could lead to damage during braking operations.
Data Source
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AI summary
A brake shoe (1) for a vehicle according to an aspect of the invention includes: a friction member (10) for braking a wheel by pressing a friction surface (11) of the friction member (10) against a wheel tread; and a base plate (20) having a support surface (21) and at least one claw (50), the support surface (21) supporting the friction member (10), the at least one claw (50) being provided on the support surface (21) and holding the friction member (10) inside the friction member (10). The at least one claw (50) is bent at a position away from the support surface (21) as viewed in a cross section (XZ cross section) that includes the axis extending in the longitudinal direction of the base plate (20) and the axis extending in the thickness direction of the friction member (10).