Disk Brake Cylinder Abrasion Prevention via Metal Spacer
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Solution Overview
Problem
The reliability of disk brakes is compromised when a cylinder made of aluminum alloy is used, as the convex parts of the parking brake mechanism can abrade the concave parts, leading to degradation and potential contamination.
Innovation Solution
A disk brake design incorporating a rotation control part with convex and concave parts having curved surfaces, along with a metal spacer resiliently fitted in the cylinder, which prevents direct contact and abrasion, ensuring the convex parts do not abrade the aluminum alloy cylinder, and maintains brake fluid introduction and discharge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a cylinder is made of aluminum alloy material, then weight is reduced, but the convex part of the parking brake mechanism abrades the concave part of the cylinder, degrading reliability
Solution Approach 1:
A metal spacer is introduced as an intermediary component between the convex part of the parking brake mechanism and the concave part of the aluminum alloy cylinder. The spacer prevents direct contact and abrasion between these parts, allowing the cylinder to maintain its lightweight aluminum alloy construction while eliminating the reliability issue caused by abrasion. The spacer acts as a protective mediator that transfers the mechanical interaction without causing damage to the cylinder.
2Ease of operation
If convex parts directly engage with concave parts of the aluminum alloy cylinder, then the parking brake mechanism functions properly, but abrasion occurs leading to contamination and reliability degradation
Solution Approach 1:
The metal spacer serves as a mediator that enables the parking brake mechanism to function properly while preventing harmful abrasion and contamination. The spacer is positioned between the convex part and the concave part, allowing mechanical engagement to occur through the spacer rather than directly on the aluminum alloy cylinder surface, thus eliminating material transfer and contamination.
Solution Approach 2:
The invention changes the material parameter of the interface between the convex part and the cylinder. Instead of direct aluminum alloy-to-steel contact, a metal spacer with appropriate material properties is introduced, changing the friction and wear characteristics of the interface. This parameter change reduces abrasion while maintaining the necessary mechanical function.
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 the reliability of the disk brake by preventing abrasion and contamination, while maintaining effective brake operation and fluid flow, thus improving the overall performance and durability.
Implementation Method 1
a metal spacer resiliently disposed in an inner circumference of the cylinder
Data Source
AI summary
Provided is a disk brake in which a rotation control part for controlling relative rotation of a cartridge and a cylinder of a parking brake mechanism is formed at the cartridge and includes convex parts having curved surfaces and concave parts formed at the cylinder and having curved surfaces, and a spacer formed of stainless steel, resiliently fitted into an inner circumference of the cylinder and including arc part having the same shape as the concave parts is disposed between the convex parts and the concave parts.