Drum Brake Cable Guide Support for Higher Guide Strength
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Solution Overview
Problem
The existing vehicle drum brake designs face challenges in increasing the strength of the guide part for the brake cable, necessitating thicker suppression members to withstand moments and shear forces, which can complicate the design and increase material usage.
Innovation Solution
The vehicle drum brake incorporates a support part that abuts the guide part in both the radial and parallel directions to the central axis of the back plate, ensuring strength without increasing the number of members or the thickness of the suppression member, and integrates the guide part with the suppression member to enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plate thickness of the suppression member is increased to withstand moment and shear force from the brake cable, then the strength of the guide part is improved, but the device complexity and material usage increase
Solution Approach 1:
The guide part is integrated into the suppression member as a unified structure. The suppression member includes a guide portion that guides the brake cable, eliminating the need for a separate guide component. This merging provides structural support and guidance functions simultaneously, improving strength without adding device complexity.
Solution Approach 2:
The suppression member is configured to extend in the radial direction of the back plate, creating a three-dimensional support structure. The guide part is positioned at a specific radial location to optimally resist moment and shear forces from the brake cable, utilizing spatial arrangement to enhance strength without increasing overall plate thickness.
2Strength
If the plate thickness of the suppression member is increased to withstand moment and shear force from the brake cable, then the strength of the guide part is improved, but the material usage increases
Solution Approach 1:
The guide part is integrated into the suppression member as a unified structure. The suppression member includes a guide portion that guides the brake cable, eliminating the need for a separate guide component. This merging provides structural support and guidance functions simultaneously, improving strength without adding device complexity.
Solution Approach 2:
The suppression member is designed with varying thickness and structural characteristics at different locations. The guide portion has optimized local geometry to efficiently resist moment and shear forces from the brake cable, concentrating material where needed rather than uniformly increasing thickness throughout the entire component.
Data Source
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AI summary
The vehicle drum brake comprises an anchor attachment part formed on a back plate, an anchor plate that rotatably supports a brake shoe, the anchor plate being fixed to the anchor attachment part, and a guide part that guides a brake cable coupled to a brake lever, the guide part being fixed inside of the anchor attachment part in the radial direction of the back plate, wherein a support part (50) is integrally provided on at least one of the back plate (13) and the anchor plate (21), the support part (50) abutting on the guide part (48) to support the guide part (48). Thus, the strength of the guide part against the brake cable can be increased.