Disc Brake Lining Recess Geometry for Wheel Clearance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The structural constriction between disk brake components and the vehicle wheel leads to a risk of brake parts grinding against the rotating wheel, as existing brake pads do not provide sufficient clearance for the hold-down means, resulting in potential contact and damage.
Innovation Solution
The brake pad design features a depression in the upper margin of both the backplate and friction pad, creating a clearance for the hold-down means, which reduces the radial extent of the hold-down's position, thereby minimizing the risk of contact with the vehicle wheel. Additionally, the hold-down means is designed with an S-shaped cranked portion and a straight longitudinal section to further alleviate this constriction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake pad is designed with a standard circular-arc-shaped upper margin to adapt to the brake disk contour, then the braking performance is maintained, but the hold-down means cannot pass through the brake pad, causing structural constriction and risk of grinding against the vehicle wheel
Solution Approach 1:
The upper margin of the brake pad is segmented into two distinct parts: a first upper margin with a circular-arc-shaped profile for adapting to the brake disk contour, and a second upper margin with a different profile (flat, inclined, or stepped) that creates clearance for the hold-down means. This segmentation allows the brake pad to simultaneously maintain braking performance and prevent structural constriction with the vehicle wheel.
2Object-affected harmful factors
If the brake pad upper margin is modified to create clearance for the hold-down means, then the structural constriction is reduced, but the adaptation to the circular circumferential contour of the brake disk is compromised
Solution Approach 1:
Different regions of the brake pad upper margin are given different geometric qualities: the first upper margin maintains the circular-arc-shaped profile for optimal contact with the brake disk, while the second upper margin features a modified profile (flat, inclined, or stepped) specifically designed to accommodate the hold-down means. This local differentiation resolves the contradiction between maintaining shape adaptation and reducing structural constriction.
3Strength
If the hold-down means is positioned radially outward to provide sufficient support for the brake pad, then the brake pad support is improved, but the clearance to the vehicle wheel is reduced, increasing the risk of contact
Solution Approach 1:
The hold-down means is designed with a cranked portion that extends in a direction angled relative to the radial direction of the brake disk. This dimensional change allows the hold-down means to provide sufficient radial support for the brake pad while its angled configuration creates additional clearance in the radial direction, preventing contact with the vehicle wheel.
Data Source
AI summary
A disc brake is proposed having a brake calliper (1) which reaches over a brake disc (2) and brake linings (3) which are arranged on the two sides thereof and are composed in each case of a friction lining (4) and a rear plate (5), and having a hold-down (7) which runs transversely over the brake linings (3) and is supported against the brake linings towards the disc brake axis (A). The circumferential contour of the rear plate (5) of at least one of the brake linings is defined by an upper edge (21), a lower edge (22) and two side edges (23A, 23B) which extend between the upper and the lower edge. The circumferential contour of the friction lining (4) is also defined by an upper edge (31), a lower edge and two side edges which extend between the upper and the lower edge. In order to make a contribution to the solution of the problem of the structural tightness between the components of the disc brake and the vehicle wheel which rotates around the brake, the main course of the upper edges (21 and 31) of the rear plate (5) and the friction lining (4) where the hold-down (7) runs over the brake lining (3) is interrupted by a recessed portion (25 and 35) of the upper edge (21 and 31) in the direction of the brake disc axis (A).