Brake Cable Holder with Closed Cross-Section and Leaf Spring
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Solution Overview
Problem
Existing hold-down devices for disc brake pads do not adequately protect signal or control cables from heat and vibrations, posing safety risks during maintenance, especially when routing cables over rotating brake parts.
Innovation Solution
A hold-down device with a cable holder featuring a transverse web that forms a closed cross-section with the retaining bracket, combined with a resilient leaf spring and positive-locking elements, ensures secure cable routing and prevents unexpected spring relaxation during maintenance, while maintaining the cable at a safe distance from heat sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cable is routed over the rotating brake parts for control or sensory purposes, then the cable can be positioned away from the brake assembly, but the cable is exposed to heat and vibrations during braking operation
Solution Approach 1:
The cable holder is nested within the hold-down device structure, specifically utilizing the pressure web as part of the cable holder assembly. This integration allows the cable to be protected within the existing structural envelope without requiring separate external routing, thereby maintaining accessibility while shielding the cable from heat and vibrations.
Solution Approach 2:
The cable holder acts as an intermediary structure between the cable and the harmful environment (heat and vibrations). By positioning the cable within the cable holder that is attached to the pressure web, the holder mediates the exposure by providing a protective barrier while still allowing the cable to extend outward for routing purposes.
2Object-affected harmful factors
If the cable holder forms a closed cross-section with the retaining bracket, then the cable is protected from heat and vibrations, but the cable holder structure becomes more complex
Solution Approach 1:
The cable holder is merged with the pressure web structure, where the pressure web itself becomes part of the cable holder assembly. This combining of functions allows the cable holder to form a closed cross-section with the retaining bracket without requiring completely separate structural elements, thereby reducing overall complexity while maintaining protective enclosure.
Solution Approach 2:
The pressure web serves multiple functions: it provides structural support for the brake pad, acts as an attachment point for the cable holder, and becomes part of the protective enclosure for the cable. This multi-functionality reduces the need for additional dedicated components, simplifying the overall structure while achieving heat and vibration protection.
3Reliability
If the leaf spring is arranged under the transverse web of the cable holder, then the spring is contained and cannot jump away during maintenance, but the cable holder must extend over a greater length
Solution Approach 1:
The leaf spring is nested within the structural envelope formed by the cable holder and retaining bracket. By positioning the spring under the transverse web and having the cable holder extend over it, the spring becomes contained within the overall assembly, preventing it from jumping away during maintenance while utilizing the existing structural space.
Data Source
Figure 1~3a
Figure 4~5
Figure 6~7
AI summary
The binder has a retaining bracket (11) fixed at a disk brake and extending transverse to a brake pad. A cable holder (20) fastened to the retaining bracket and a side (13) of the retaining bracket facing the brake pad forms a cross section closed by a partial length of the retaining bracket for passing a signal or control cable (21). The cable holder has a cross web (26) at a length (L) forming the closed cross section, under which a flat spring (12) arranged in a longitudinal direction of the bracket is fed and the flat spring is supported against the retaining bracket in a springy manner.