Disk Brake Restoring Device for Residual Torque Reduction
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Solution Overview
Problem
Residual grinding torques in disc brakes, especially in sliding caliper disc brakes, lead to increased fuel consumption and maintenance costs due to incomplete release of brake pads from the brake disc, and existing solutions are either expensive or prone to failure in heavy commercial vehicles.
Innovation Solution
A disc brake design with a resetting device for the rear brake pad that uses slidably guided restoring elements, which are securely mounted to the pad carrier and elastically supported, allowing for complete detachment of the brake pad from the disc after braking, thereby avoiding residual torques and unnecessary wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clamping elements are used to give the brake caliper a quasi-fixed position, then clearance adjustment on both sides is made possible, but the solution is expensive and prone to failure due to component tolerances and deformations
Solution Approach 1:
The invention extracts the clearance adjustment function from the brake caliper assembly and transfers it to the brake pad itself through the restoring device. This separates the adjustment mechanism from the caliper, eliminating the need for clamping elements on the caliper and reducing overall system complexity while maintaining reliable clearance adjustment.
Solution Approach 2:
The restoring device acts as an intermediary mechanism between the brake pad and the braking system. It provides a dedicated structure for clearance adjustment that mediates between the brake pad's friction surface and the brake disc, ensuring reliable clearance control without involving the brake caliper's sliding mechanism.
2Reliability
If clamping elements are used for clearance adjustment, then both sides can be adjusted, but the clamping elements are susceptible to dirt, corrosion, and heavy loads from vibrations
Solution Approach 1:
The invention removes the clamping elements from the brake caliper assembly and relocates the adjustment function to the brake pad's restoring device. This extraction eliminates the exposure of adjustment components to harmful environmental factors like dirt and corrosion in the caliper's sliding path.
Solution Approach 2:
Instead of adjusting the caliper's position relative to the brake disc (external adjustment), the invention inverts the approach by adjusting the brake pad's position relative to the caliper through the restoring device. This internal adjustment mechanism is protected from environmental exposure.
3Reliability
If clamping elements are used to support the brake pad, then clearance can be adjusted, but the clamping elements can rust and block, impairing brake effectiveness
Solution Approach 1:
The invention extracts the clamping function from the brake pad support system and replaces it with a restoring device that uses elastic elements. This eliminates the rust and blocking problems associated with traditional clamping elements while maintaining reliable brake pad support and clearance adjustment.
Solution Approach 2:
The restoring device uses simple elastic elements that are inexpensive and reliable, replacing complex clamping mechanisms. These elastic restoring elements do not suffer from rust or blocking issues and maintain their function throughout the brake pad's service life.
4Reliability
If the brake pad is connected to the actuating piston, then the piston can restore clearance during retraction, but this does not work with sliding calipers where the caliper remains freely movable
Solution Approach 1:
The invention segments the clearance restoration function from the caliper's sliding mechanism and places it directly on the brake pad through the restoring device. This segmentation allows the restoration function to work independently of the caliper type, making it compatible with both fixed and sliding calipers.
Solution Approach 2:
The restoring device serves as an intermediary mechanism between the brake pad and the caliper system. It provides a universal solution that mediates the clearance restoration function regardless of whether the caliper is fixed or sliding, ensuring adaptability across different brake system configurations.
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 solution effectively reduces residual grinding torques and brake pad wear, is robust, and suitable for heavy commercial vehicles, without the need for prone-to-failure clamping elements, ensuring efficient operation and reduced maintenance costs.
Implementation Method 1
a restoring head (94, 94'') that can be reset elastically against a predetermined force protrudes
Implementation Method 2
this axle body is held spring-loaded in the outer casing
Data Source
AI summary
A disk brake for a motor vehicle has a brake application device, a floating caliper that reaches over a brake disk (4), preferably a lining wear adjustment device, a brake bracket (2) having guiding surfaces opposite each other in the circumferential direction of the brake disk (4), wherein between the guiding surfaces, on the brake application side and the back side of the brake disk (4), at least one respective brake lining having a lining carrier (7) and having at least one friction lining (6) is guided movably parallel to an axis of rotation of the brake disk (4) and can be actuated by a brake application force, and at least one restoring device, which supports at least the back-side brake lining on the brake bracket (2) by means of the lining carrier (7), wherein the restoring device comprises at least two restoring elements (9), which are attached to the lining carrier (7) of at least the back-side brake lining in such a way that the restoring elements are guided movably parallel to the axis of rotation of the brake disk (4).