Brake Lining Mounting Spring Retention Design
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Solution Overview
Problem
Existing brake pad holders face issues with spring deformation due to limited connection points, thermal load, and high frictional resistance, leading to reduced service life and functional reliability.
Innovation Solution
A brake pad holder design featuring a pad retaining spring with a round cross-section and a pad retaining clip adapted to its contour, reducing heat load and friction, and using a bent wire or sheet metal for the clip, ensuring proper assembly and preventing unsuitable brake pad installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad retaining spring is fastened to retaining tabs that pass through recesses in the spring, then the brake pad position is secured, but the spring is subjected to strong deflection and deformation due to being used as a handle gripped in the middle
Solution Approach 1:
The invention inverts the conventional attachment method by having the retaining tabs engage from the inside out rather than passing through recesses. The tabs are integrated into the brake pad and engage with the spring in a manner that eliminates the need to grip the spring in the middle, thereby preventing deformation and preserving spring characteristics while still securing the brake pad position.
Solution Approach 2:
The invention changes the geometric parameters of the attachment system by using a specific configuration of retaining tabs and spring engagement points that distribute forces more favorably. This parameter change prevents the strong deflection that occurs when the spring is gripped in the middle, maintaining both positional stability and spring integrity.
2Force
If the pad retaining spring has a leaf shape with broad side contact against the pad retaining bracket, then the spring provides retaining force, but the frictional resistance is relatively high when the brake pads are displaced
Solution Approach 1:
The invention transitions from a broad-surface leaf spring design to a wire-shaped spring that functions as a flexible element with line contact rather than surface contact. This reduces the frictional resistance between the spring and the pad retaining bracket while maintaining the necessary retaining force through the spring's elastic properties and geometric configuration.
Solution Approach 2:
The wire-shaped spring with circular cross-section introduces curvature and rotational symmetry that reduces contact area and friction compared to the flat leaf shape. The circular geometry allows the spring to flex and rotate slightly, reducing frictional resistance during brake pad displacement while maintaining effective retaining force.
3Reliability
If the pad retaining spring is subjected to frictional heat during braking, then the spring performs its retaining function, but the spring characteristics change in an unforeseeable extent
Solution Approach 1:
The wire-shaped spring design with reduced contact area minimizes the generation of frictional heat during operation. The line contact between the spring and the pad retaining bracket produces less heat compared to the broad surface contact of a leaf spring, thereby preventing unpredictable changes in spring characteristics and maintaining manufacturing precision throughout the service life.
4Device complexity
If only two connection points are provided for fixing the pad retaining spring, then the attachment is simple, but the spring acts as a carrier clamped on two sides with strong deflection tendency
Solution Approach 1:
The invention inverts the attachment approach by integrating the retaining tabs into the brake pad structure and having them engage with the spring in a configuration that eliminates the clamping effect. This simple yet inverted arrangement prevents the spring from being clamped on two sides, reducing deflection while maintaining attachment simplicity.
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 enhances service life, reduces frictional resistance, and improves operational reliability by minimizing heat load and ensuring correct brake pad installation, resulting in cost-effective and reliable brake pad operation.
Implementation Method 1
a pad retaining spring (5), consisting of spring wire, is fastened in an upper edge region of the brake lining (2)
Implementation Method 2
The frictional heat generated during braking results in a geometry-related thermal load on the pad retaining springs
Implementation Method 3
a geometry-related thermal load on the pad retaining springs, which influences their spring characteristics
Data Source
AI summary
The invention relates to a brake lining mounting for a disc brake, in particular for a commercial vehicle. Brake linings (2) that are assigned to each side of a brake disc are held in a spring-loaded manner by means of respective lining retaining springs (5) in a lining channel of a locally fixed backing plate or brake calliper (1). A lining retaining bracket (6) that is fixed to the brake calliper (1) is supported on said linings and extends in the axial direction of the brake disc. Said mounting is designed in such a way that each lining retaining spring (5) consists of spring wire and the lining retaining bracket (6) is adapted, in the region (9) that makes contact with at least one lining retaining spring (5), to the cross-sectional contour of the latter.