Brake Pad Wear Indicator Layout That Protects the Fixation Clip
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Solution Overview
Problem
Existing brake caliper wear indication devices face issues with unreliable mounting and premature failure of the fixation means, leading to incomplete wear detection and unnecessary replacement of the entire device.
Innovation Solution
The signal wire is externally arranged on the wear indication device to meet the brake disc first, protecting the fixation means and allowing only the ruptured wire to be replaced, with a clamping mechanism for simplified mounting that secures the wear indication device to the brake pad carrier without requiring additional recesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wear indication device is mounted using friction-based clips or press-fit connections, then the mounting is simplified, but the fixation means becomes unreliable and may detach or slip during operation
Solution Approach 1:
The wear indication device is divided into separate functional components: a head portion for wear detection and a fixation means for mounting. This segmentation allows the fixation means to be optimized for secure attachment while the head portion remains accessible for wear monitoring, resolving the contradiction between simple mounting and reliable fixation.
Solution Approach 2:
Instead of having the fixation means subject to wear like conventional designs, the invention inverts the arrangement by positioning the signal wire to contact the brake disc first, while the fixation means remains protected from wear. This inversion ensures reliable fixation while enabling accurate wear detection.
2Measurement precision
If the fixation means is positioned to be worn off by the brake disc, then wear indication is achieved, but the fixation means fails prematurely and the entire device must be replaced
Solution Approach 1:
The wear indication device is segmented into a reusable fixation means and a consumable signal wire. The signal wire is designed to be worn off and ruptured to indicate wear limit, while the fixation means remains intact and reusable. This segmentation allows precise wear detection without compromising the service life of the mounting mechanism.
Solution Approach 2:
The invention applies the principle of discarding and recovering by designing the signal wire as a disposable component that is consumed during wear indication, while the fixation means is recovered and reused. When the signal wire ruptures after indicating wear limit, only the wire needs replacement while the fixation means remains functional for subsequent installations.
3Reliability
If additional recesses are added to the brake pad carrier for mounting the wear indication device, then the fixation is more secure, but the device complexity and manufacturing cost increase
Solution Approach 1:
The fixation means is designed to utilize existing structural features of the brake pad carrier (such as existing recesses or surfaces) for mounting purposes, rather than requiring dedicated specialized recesses. This multi-functional approach allows secure mounting while maintaining simplicity of the overall structure and reducing manufacturing complexity.
Data Source
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AI summary
A brake caliper(10) for a vehicle brake, the brake caliper comprising: - a brake pad (100) having a friction lining (120) and a brake pad carrier configured to carry the friction lining proximate to a brake disc of the vehicle brake, wherein the friction lining has a contact surface (121) facing away from the brake pad carrier which is configured to bear against the brake disc of the vehicle brake during braking, and - a wear indication device (200) having a fixation means (210) and a signal wire, wherein the fixation means (210) is configured to engage the brake pad carrier such that the wear indication device (200) projects from the brake pad carrier towards the contact surface, the signal wire (220) being at least partly arranged externally on the wear indication device (200) and projects therefrom towards the contact surface.