Commercial Disc Brake Caliper Resetting for Low Rubbing Torque
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Solution Overview
Problem
Existing disc brakes for commercial vehicles experience residual rubbing torques after braking, leading to increased fuel consumption and reduced service life of components due to wobbling movements and vibrations during driving, which existing resetting devices fail to effectively mitigate.
Innovation Solution
A disc brake design featuring a sliding caliper with a central opening, equipped with a spreading device that engages on both brake pads to reset the caliper synchronously, using resilient spreading elements that act counter to the application direction, ensuring uniform spring force distribution and minimizing oblique wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resetting device is arranged in the guide beam (DE 10 2007 001 213), then the brake caliper can be reset into initial position, but reliable functioning is not permitted in all situations due to component tolerances and deformations
Solution Approach 1:
The patent introduces a resetting device with a resilient element that acts as an intermediary between the brake caliper and the guide beam. This resilient element compensates for component tolerances and deformations, ensuring reliable resetting function under varying conditions without requiring complex adjustment mechanisms.
Solution Approach 2:
The resetting device utilizes a resilient element whose elasticity parameters allow it to adapt to different operational conditions. The resilient nature enables the device to maintain functionality despite variations in component dimensions and deformations, resolving the reliability issue without increasing structural complexity.
2Device complexity
If the brake caliper remains in displaced position after brake release, then the structure is simple, but residual rubbing torques increase fuel consumption and reduce service life
Solution Approach 1:
The resetting device is designed to automatically reset the brake caliper to its initial position as soon as the braking force is released. This preliminary action prevents the caliper from remaining in the displaced position, thereby eliminating residual rubbing torques that would otherwise increase fuel consumption and reduce component service life.
3Reliability
If resetting device acts on brake caliper with brake carrier as counterbearing, then resetting function is achieved, but oblique wear and non-uniform contact occur
Solution Approach 1:
Instead of having the resetting device act directly on the brake caliper in a way that causes oblique contact, the patent inverts the approach by using a resilient element that distributes the resetting force more uniformly. This inversion of the force application method prevents oblique wear and ensures non-uniform contact is avoided, while maintaining reliable resetting function.
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 effectively reduces residual rubbing torques, prolongs the service life of brake pads and discs, and lowers operating costs by ensuring precise resetting and uniform wear patterns.
Implementation Method 1
The spreading device has resilient spreading elements which engage on the respective pad carrier plate
Implementation Method 2
The spreading device has resilient spreading elements which engage on the respective pad carrier plate
Data Source
AI summary
A resetting device by which a brake caliper can be reset after a braking-induced displacement and release of a brake. The resetting device has a spreading device which has resilient spreading elements. The spreading device is arranged in a central opening of the brake caliper. The spreading elements engage, outside the friction pads, directly or indirectly on one side at at least two abutment regions arranged spaced apart from one another relative to the center, of the brake pads, where the abutment regions have one abutment surface and one bearing surface on which the spreading elements are movably arranged. The spreading device has spring arms, of which in each case two lie against an associated pad carrier plate, where the spring arms are connected to one another in the central region of the opening. The spring arms are connected to a retaining bow which is attached to a brake carrier.