Disc Brake Rolling Bearing Detent Assembly for Precise Alignment
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Solution Overview
Problem
Existing disc brake systems face issues with the precise alignment of rolling bearings between the pivot lever and the thrust piece, which can lead to reduced braking action if not correctly assembled.
Innovation Solution
The proposed solution involves a rolling bearing design where the bearing cage has a detent face with recesses that engage with detent parts on the bearing shell segment, creating a clamping effect in the assembly position to ensure precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a holding mechanism with latching elements is provided on the bearing cage to prevent sliding off during assembly, then the alignment precision is improved, but the device complexity increases and parts may snap off during first brake activation
Solution Approach 1:
The patent employs a disposable holding mechanism where the holding element is designed to break away after serving its temporary purpose during assembly. This resolves the contradiction by providing sufficient alignment precision during assembly while avoiding complex permanent mechanisms that would remain in the final product.
Solution Approach 2:
The holding mechanism performs its function of preventing sliding off during assembly before being discarded. The element is designed to be sufficient for the preliminary assembly stage but is intended to break away during first activation, thus resolving the contradiction between needing precision during assembly and avoiding complexity in the final product.
2Ease of operation
If the bearing cage is freely movable during assembly, then the ease of assembly is improved, but the alignment precision deteriorates due to potential inadvertent release
Solution Approach 1:
The patent implements a dynamic holding mechanism that transitions from a constrained state during assembly to a broken-away state during operation. The holding element is designed to be sufficient during assembly but break away during first activation, resolving the contradiction between ease of assembly and alignment precision.
3Reliability
If a holding mechanism is provided to prevent inadvertent release, then the reliability is improved, but the device complexity increases and movable residues may compromise brake functioning
Solution Approach 1:
The holding element is designed as a disposable component that breaks away after serving its temporary purpose. This resolves the contradiction by ensuring reliable assembly without leaving complex or problematic residues in the final product.
Solution Approach 2:
The holding mechanism is intentionally designed to be discarded after serving its purpose during assembly. The element breaks away during first activation, eliminating the complexity and potential harm of permanent holding mechanisms while maintaining assembly reliability.
Data Source
AI summary
A rolling bearing (10) for a disc brake includes a bearing shell segment (12) and a bearing cage (14) having rolling members (16) that roll on the bearing shell segment (12). The bearing cage (14) is movable in the circumferential direction of the bearing shell segment (12) and releasably fixed in an assembly position in relation to the bearing shell segment (12). The bearing cage (14) has a detent face (22) with at least one recess (24, 24′, 24″), and the bearing shell segment (12) has at least one detent part (20, 20′), the recess (24, 24″) and the detent part (20, 20′) being assigned to one another and mutually engaged in the assembly position while generating a clamping effect.