Disc Brake Wear Detection via Caliper-Mounted Pointer
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Solution Overview
Problem
Existing disc brake wear detection methods require removal of the vehicle wheel for visual inspection, which is inconvenient and reduces operational reliability, and existing solutions compromise the strength and fatigue resistance of the brake support.
Innovation Solution
A disc brake design featuring a pointer element connected to the fixing screws of the brake caliper, which extends opposite to the brake disc, allowing visual wear detection without modifying the carrier or other components, using a separate pointer element that moves with the brake caliper to indicate wear through a visible change in distance, and can be fixed using press-fit sleeves or a clamping screw for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If wear detection markings are produced by forming recesses or notches in the brake support, then visual wear detection is enabled, but the strength and fatigue resistance of the brake support are reduced
Solution Approach 1:
The wear detection function is segmented from the brake support structure. Instead of forming recesses or notches in the brake support, a separate pointer element is used that attaches to the brake caliper via screws. This separates the detection component from the load-bearing structure, enabling visual wear detection without compromising the brake support's strength and fatigue resistance.
Solution Approach 2:
A pointer element serves as an intermediary component between the brake caliper and the visual detection system. The pointer element attaches to the brake caliper using screws and extends outward to provide visual wear indication, mediating between the mechanical braking system and the visual detection requirement without requiring modifications to the brake support structure.
2Measurement precision
If wear detection requires removal of the vehicle wheel for inspection, then accurate wear measurement is possible, but operational reliability is reduced and convenience is compromised
Solution Approach 1:
The pointer element provides self-service wear detection by extending outward from the brake caliper in a position that is visually accessible without removing the vehicle wheel. The wear indication is automatically available through the pointer's position relative to the brake disc, allowing drivers or maintenance personnel to assess wear conditions during routine inspections while the vehicle is in operation, thereby maintaining operational reliability.
Solution Approach 2:
The wear detection is moved from an internal dimension (requiring wheel removal to access) to an external dimension (visible from the outside). The pointer element extends radially outward from the brake caliper, creating a visual indicator that can be observed from the vehicle's exterior without disassembling any components, thus enabling continuous monitoring while maintaining operational reliability.
3Strength
If a separate pointer element is used instead of modifying the carrier, then structural integrity is maintained, but device complexity increases
Solution Approach 1:
The pointer element serves multiple functions: it provides visual wear detection, indicates brake pad thickness, and can serve as a reference for brake disc runout measurement. By consolidating these detection functions into a single external component that attaches to the existing brake caliper, the solution maintains structural integrity while adding minimal complexity compared to modifying the carrier or brake support structure.
Data Source
AI summary
A disc brake is arrangeable in a space that accommodates a brake caliper having an application device. The brake caliper is held slidably with guiding elements on a brake carrier, which is fastened with screws to an axle connection at the vehicle. The caliper straddles a brake disc, against which brake pads can be pressed on either side while braking. At least the brake pad on the application side is mounted movably in the direction of the brake disc in a pad shaft of the brake carrier. A device for the visual identification of the wear of a brake pad and/or brake disc is constructed so that for identifying wear, a pointer element, extending in the opposite direction to the brake disc, is connected at least at one screw.