Self-Reinforcing Disc Brake Pad Stabilization
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Solution Overview
Problem
Self-reinforcing disc brakes experience premature wear due to radial oblique wear of brake pads, leading to increased operating costs and reduced service life, as existing designs fail to adequately stabilize the brake pads against pressure distribution and sliding speed profiles.
Innovation Solution
The design includes a brake pad with ramps integrated into the lining carrier plate, which provides even load distribution across the friction surface, stabilizes the brake pad in the radial direction, and features a ball track system with a plain bearing shell to reduce friction and protect components from heat, along with a snap connection for the brake stamp to ensure secure attachment and easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake pad is pressed against the brake disc during braking, then the friction force causes the brake pad to move in the direction of rotation, but this results in radial oblique wear of the brake pad
Solution Approach 1:
The invention divides the single stabilizing function into two separate stabilization mechanisms: one for circumferential direction (using the existing brake stamp geometry) and one for radial direction (using the new pressure stamps with ramps). This segmentation allows each component to specialize in stabilizing against specific wear patterns, thereby improving overall reliability and extending service life by preventing oblique wear.
Solution Approach 2:
The pressure stamps with ramps act as intermediary elements between the brake stamp and the brake pad. These intermediaries transfer and distribute the stabilizing forces more effectively, converting the circumferential movement into radial stabilization while maintaining even pressure distribution across the friction surface.
2Force
If the brake pad moves in the direction of rotation during braking, then self-reinforcement is achieved, but this causes uneven pressure distribution and sliding speed profile leading to oblique wear
Solution Approach 1:
The invention addresses the uneven pressure distribution by introducing a new spatial dimension - the ramps are inclined at specific angles relative to the friction surface. This angular dimension allows the pressure force to be decomposed into components that simultaneously provide self-reinforcement in the axial direction and even distribution across the radial dimension, eliminating oblique wear while maintaining the beneficial self-reinforcement effect.
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
This design ensures even pad wear, improved stabilization, and extended service life by maintaining consistent pressure distribution and reducing the impact of sliding speed on wear patterns, while allowing for easy pad replacement and enhanced operational safety.
Implementation Method 1
it is held in a plain bearing shell, which is preferably embedded in the front side of the pressure stamp, so that it is protected from temperature damage caused by the significantly hotter lining carrier plate
Implementation Method 2
each pressure stamp has a bearing ball on the front side, which lies in a recess provided with ramps rising from the inside to the outside in the circumferential direction of the brake disc. During braking, i.e. when the brake pad is pressed against the brake disc by means of the application device, the brake pad moves in the direction of rotation due to the frictional forces when it is pressed against the brake disc, with the associated ramp simultaneously moving along the bearing ball, reinforcing the pressure on the brake disc
Implementation Method 3
when the brake pad is pressed against the brake disc by means of the application device, the brake pad moves in the direction of rotation due to the frictional forces when it is pressed against the brake disc
Data Source
Figure 1
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AI summary
The invention relates to a self-reinforcing disc brake having a brake caliper (1) extending over a brake disc (3); brake linings (2) that can be pressed against the brake disc (3) on both sides, by means of which a brake plunger (8) mounted on a brake application side by means of a receptacle (16) and contacting a rotary lever (7) of a brake application device on the other side can be actuated; two pressure plungers (10) aligned to the brake plunger (8) and disposed at a distance thereto on both sides, each supported by means of a expansion bearing (11) of a self-reinforcing device on the brake lining (2), designed such that the expansion bearings (11) and the receptacle (16) are disposed such that theoretical lines connecting the center points defined by the center axes of the pressure plungers (10) and the brake plunger (8) form a triangle (D).