Disc Brake Pad Spring Structure for Caliper Movement Suppression
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Solution Overview
Problem
In disc brakes, the increased load on retainers due to elastic support of caliper bodies leads to a decrease in durability, as the retainer's small length in the disc axial direction results in higher loads and potential durability issues.
Innovation Solution
A disc brake design incorporating a mounting member with pad springs that include suppression parts to restrict caliper movement in the rotation and radial directions, reducing the load on the retainer and enhancing durability by supporting friction pads and suppressing caliper movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retainer is used to elastically support the caliper body, then the caliper movement is controlled, but the load on the retainer increases and durability decreases
Solution Approach 1:
The pad spring is divided into multiple functional parts: a pad support part for supporting friction pads and a suppression part for suppressing caliper movement. This segmentation allows the suppression part to have a larger area to distribute loads, reducing stress concentration and improving retainer durability while maintaining caliper movement control.
Solution Approach 2:
The suppression part is designed with an extended structure in the disc axial direction, increasing its area beyond what a simple retainer provides. This dimensional extension allows the suppression part to distribute loads over a larger area, reducing the load on the retainer and improving durability while maintaining effective caliper suppression.
2Length of moving object
If the retainer length in the disc axial direction is kept small, then the structure is compact, but the load on the retainer increases
Solution Approach 1:
The suppression part extends in the disc axial direction to increase its area, providing a larger surface to distribute loads. This dimensional extension allows the structure to handle higher loads without increasing the overall footprint in other directions, effectively decoupling length from load capacity.
Solution Approach 2:
The pad spring serves multiple functions: supporting friction pads through the pad support part and suppressing caliper movement through the suppression part. This multi-functionality allows the structure to manage loads more effectively without requiring additional components, maintaining compactness while handling increased forces.
3Force
If the retainer is made larger to reduce load, then the structure becomes more complex, but compactness is reduced
Solution Approach 1:
The suppression part is integrated with the pad spring structure rather than being a separate component. This merging combines the friction pad support function and the caliper suppression function into a single unified structure, improving load distribution without increasing overall device complexity.
Solution Approach 2:
The pad spring is designed to perform multiple functions: supporting friction pads and suppressing caliper movement. This multi-functionality eliminates the need for separate retainers or suppression mechanisms, distributing loads effectively while maintaining structural simplicity and avoiding increased complexity.
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 suppresses caliper movement in directions other than the axial direction, reducing dragging and uneven wear of friction pads, thereby enhancing the durability of both the pad springs and the disc brake system.
Implementation Method 1
a pad spring provided on the mounting member... at least one of the pair of pad springs includes a pad support part supporting the friction pads, and a suppression part suppressing at least one of movement of the caliper in a rotation direction of the disc and movement of the caliper in a radial direction of the disc
Data Source
AI summary
This disc brake includes a mounting member fixed to a non-rotating portion of a vehicle and provided to straddle an outer circumferential side of a disc, a caliper provided on the mounting member to be movable in an axial direction of the disc, a pair of friction pads provided on the mounting member to be movable and pressed against both sides of the disc by the caliper, and a pair of pad springs provided on the mounting member. At least one of the pair of pad springs includes a pad support part supporting the friction pads, and a suppression part suppressing at least one of movement of the caliper in a rotation direction of the disc and movement of the caliper in a radial direction of the disc.