Brake Caliper Anti-Rotation Structure for Reduced Axial Length
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Solution Overview
Problem
Existing brake calipers face challenges with large axial dimensions due to the need for both anti-rotation and sealing structures, leading to increased overall length and spatial arrangement difficulties, and require complex split body designs to reduce axial dimension, which complicates the structure and processing.
Innovation Solution
A volume-reduced brake caliper design that incorporates a motion conversion mechanism with a rotating part and a translating part, featuring an anti-rotation mechanism with an anti-rotation boss on the translating part and an anti-rotation groove in the brake caliper body, and a sealing mechanism using a ring and dust cover, which simplifies the transmission structure and reduces the number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional piston structure with both anti-rotation groove and sealing ring is used, then both anti-rotation and sealing functions are achieved, but the axial dimension of the piston becomes large
Solution Approach 1:
The patent combines the anti-rotation groove and sealing ring structure into an integrated design where the groove is positioned at the bottom of the piston rather than along the side, allowing both anti-rotation and sealing functions to be achieved within a shorter axial space
Solution Approach 2:
The patent changes the spatial arrangement by moving the anti-rotation groove from the lateral surface to the bottom surface of the piston, utilizing a different spatial dimension to achieve the same functional requirements with reduced axial length
2Reliability
If the anti-rotation groove length is increased to accommodate wear and tear throughout the life cycle, then anti-rotation reliability is improved, but the piston length must be at least twice as long as the total stroke length
Solution Approach 1:
The patent merges the anti-rotation groove with the sealing structure by positioning the groove at the bottom of the piston, allowing both functions to share the same spatial region and reducing the overall piston length required
3Length of moving object
If the brake caliper body is designed in a split body type to reduce axial dimension, then the axial size is reduced, but the structure becomes complex and processing becomes difficult
Solution Approach 1:
The patent combines multiple functions (anti-rotation and sealing) into a single integrated structure at the piston bottom, eliminating the need for split body design and maintaining structural simplicity while achieving reduced axial dimensions
Data Source
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AI summary
A size-reduced brake caliper, comprising: a brake caliper body (2), a motion conversion mechanism (5), and an anti-rotation mechanism (6). The motion conversion mechanism (5) comprises a rotation member (3) and a translation member (4). The anti-rotation mechanism (6) comprises an anti-rotation boss (4a) provided on the outer wall of the translation member (4), and an anti-rotation recess (2b) provided in the inner wall of a cylinder hole (2a) of the brake caliper body (2). The anti-rotation recess (2b) matches the anti-rotation boss (4a) so as to limit the rotation of the translation member (4). By optimizing the anti-rotation structure of the motion conversion mechanism, the axial size of the brake caliper is reduced, thus facilitating machining.