Brake Pad Wear Indicator Clamping for Replaceable Mounting
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Solution Overview
Problem
Existing brake pad wear indication systems are limited by the need for a non-reversible coupling to the brake pad carrier, which restricts the ability to replace the wear indication device and does not accommodate applications requiring device replacement.
Innovation Solution
A brake pad design featuring a recess with a clamping member that applies a clamping force in a radial direction to secure the wear indication device, allowing for a detachable connection and improved tolerance compensation and vibration damping through a non-positive connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positive and non-reversible snap-fit coupling is used to secure the wear indication device to the brake pad carrier, then the coupling reliability is improved, but the adaptability for device replacement deteriorates
Solution Approach 1:
The coupling mechanism transitions from a static non-reversible snap-fit to a dynamic reversible connection. The spring element provides continuous elastic force that maintains secure coupling during operation, while allowing controlled disassembly when needed. This dynamic characteristic enables the system to adapt between secure operation and maintenance modes.
Solution Approach 2:
The coupling mechanism is divided into separate functional elements: a spring element for providing clamping force, a clamping member for direct contact with the wear indication device, and a recess for positioning. This segmentation allows independent optimization of each component and facilitates assembly/disassembly operations.
2Manufacturing precision
If a positive connection is used to couple the wear indication device with the brake pad carrier, then the positioning accuracy is improved, but the ease of operation for device removal deteriorates
Solution Approach 1:
The coupling mechanism utilizes elastic deformation of the spring element to create a force-based connection rather than a rigid geometric fit. By changing from a position-dependent positive connection to a force-dependent elastic connection, the system achieves both precise positioning during operation and easy removal when needed.
3Ease of repair
If a non-positive connection with clamping force is used to secure the wear indication device, then the ease of repair is improved, but the stability of the connection deteriorates
Solution Approach 1:
The spring element provides continuous dynamic clamping force that adapts to operational conditions. The elastic deformation capability allows the connection to accommodate vibrations and tolerances while maintaining stable clamping pressure, thus achieving both ease of repair and connection stability.
Solution Approach 2:
The spring element acts as a cushioning element that absorbs vibrations and compensates for tolerance variations before they can affect the connection stability. This beforehand cushioning ensures stable operation while maintaining easy removability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design provides a secure, cost-effective, and simplified coupling that enables easy maintenance and replacement of the wear indication device while maintaining operational safety, with the clamping force effectively damping vibrations and compensating for tolerances.
Implementation Method 1
a clamping member, wherein the clamping member rests against an inner wall of the recess, wherein the clamping member is configured to apply a clamping force on the wear indication device in a radial direction
Implementation Method 2
the clamping force, tolerances between the wear indication device and the recess can be compensated for and vibration occurring during operation can be damped
Data Source
AI summary
A brake pad of a vehicle brake, in particular of a disc brake of a commercial vehicle, includes a brake pad carrier having a support surface, a friction lining attached to the support surface, a recess extending into the support surface in an axial direction, and a wear indication device arranged at least partially inside the recess. The brake pad carrier includes a clamping member coupled to the wear indication device that rests against an inner wall of the recess. The clamping member is configured to apply a clamping force on the wear indication device in a radial direction. The wear indication device and the clamping member are inserted axially into the recess.