Brake Caliper Piston Twist Prevention Reinforcement
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Solution Overview
Problem
Conventional brake caliper systems face issues with unauthorized or improper brake pad changes due to the potential for continued manual resetting movements after the rear end position is reached, leading to unnecessary wear without beneficial effects.
Innovation Solution
A twist prevention device with integrated reinforcement is designed between the piston and drive nut, featuring asymmetric, torsionally rigid profiling with clearance cuts to prevent unwanted deformation and unauthorized changes, ensuring robust and expert-only operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual resetting device is provided in the brake caliper, then brake pad replacement is enabled, but unauthorized or improper operation leads to unnecessary wear and potential damage
Solution Approach 1:
The drive nut features an asymmetric profiling with clearance cuts that only permit rotation in one direction (threaded engagement), preventing reverse rotation and unauthorized manipulation. This asymmetric design ensures that only proper threaded operation is possible, blocking improper resetting attempts
Solution Approach 2:
The twist prevention device with asymmetric profiling is pre-configured to detect and prevent improper operation before damage occurs. The clearance cuts and rigid profiling are designed in advance to block unauthorized rotation attempts, preventing wear and damage before they happen
2Strength
If the drive nut profiling is made torsionally rigid to prevent deformation, then protection against plastic deformation is improved, but the device complexity increases
Solution Approach 1:
The drive nut combines a rigid profiling structure with asymmetric clearance cuts, creating a composite design that provides both torsional rigidity for deformation protection and geometric features for preventing unauthorized rotation. The integration of these features into a single component achieves both goals without excessive complexity
3Stability of the object's composition
If an asymmetric profiling with clearance cuts is implemented, then protection against unwanted deformation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The asymmetric profiling is segmented into distinct features: the rigid wall sections providing torsional strength and the clearance cuts providing geometric stability. This segmentation allows each feature to be optimized independently while maintaining overall manufacturability and precision requirements
Data Source
AI summary
The invention relates to a piston for a brake caliper, which can be actuated in combined fashion, of a disk brake, which piston 1 is produced by shaping processes from a metallic material, in particular from a planar metal sheet, and which piston 1 is formed as a pot which is open on one side and which has a longitudinal axis, a wall and a piston crown, and which piston has a twist prevention facility for a drive nut. The invention is based on the problem of providing a robust piston construction which is better capable of tolerating erroneous repair work. To solve the problem, it is proposed that the twist prevention facility has, between the piston and drive nut, at least one reinforcement for protecting against plastic deformation of at least one driver.