Elastically Deformable Brake Pad Carrier for Drum Brakes
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Solution Overview
Problem
Conventional brake devices, such as drum brakes, require multiple components and complex mechanisms, leading to a bulky configuration and potential asymmetrical loading issues during operation, which can result in unintended contact and reduced braking performance.
Innovation Solution
A brake device featuring a single elastically deformable brake pad carrier that transitions between braking and freewheeling states without additional spring elements, utilizing a wedge mechanism or simplex cam mechanism for actuation, allowing for a compact design and reduced component count, with a brake pad carrier extending over 180° to maximize surface area and minimize deformation energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drum brakes with multiple brake shoes and articulation mechanisms are used, then braking function is achieved, but device complexity and number of components increase
Solution Approach 1:
The patent merges multiple brake shoes and articulation mechanisms into a single elastically deformable brake pad carrier. This single component performs the function of multiple separate brake shoes while eliminating the need for articulation joints and associated components, directly reducing device complexity while maintaining braking functionality.
Solution Approach 2:
The elastically deformable brake pad carrier serves multiple functions simultaneously: it acts as the structural support, the actuating mechanism, the return spring, and the mounting platform for brake pads. This multi-functionality eliminates the need for separate components for each function, resolving the contradiction between reliability and complexity.
2Reliability
If traditional brake shoe articulation mechanisms are used, then braking action is achieved, but asymmetrical loading and unintended contact occur
Solution Approach 1:
The brake pad carrier is designed as an elastically deformable dynamic structure that adapts its shape during braking. The elastic deformation allows the carrier to distribute forces symmetrically and naturally return to its original position, eliminating asymmetrical loading issues inherent in rigid articulation mechanisms.
Solution Approach 2:
The elastic brake pad carrier automatically returns to its freewheeling position after braking without requiring separate return mechanisms. The elastic restoration force self-corrects any positional deviations and ensures symmetrical loading, eliminating the need for complex adjustment mechanisms.
3Ease of operation
If additional spring elements and adjusting mechanisms are added, then brake pad carrier return function is improved, but device complexity increases
Solution Approach 1:
The elastically deformable brake pad carrier inherently possesses the ability to return to its original position after deformation. The elastic material itself serves as the return mechanism, eliminating the need for additional spring elements or adjusting mechanisms while improving ease of operation.
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 solution enables a more compact and efficient brake system with reduced component count, improved braking performance, and self-returning mechanism to the freewheeling state, eliminating the need for additional spring elements and adjusting mechanisms, while maintaining consistent braking action.
Implementation Method 1
the brake pad carrier being elastically deformable for the transfer from the freewheeling state into the braking state
Implementation Method 2
the brake pad which is pressed against the inner side of the brake drum via the brake pad carrier then forms a frictional resistance which leads to the braking of the brake drum
Implementation Method 3
the elastically deformed brake pad carrier is to be attributed a restoring force which returns the brake pad carrier back into the freewheeling state if no additional forces act on the brake pad carrier
Data Source
AI summary
A brake device for braking a wheel includes a brake drum, a brake pad carrier which is arranged or can be arranged in the brake drum and has at least one brake pad, and an actuator apparatus for the reversible transfer of the brake pad carrier between a braking state, in which the brake pad is operatively connected to the brake drum, and a freewheeling state, in which the operative connection between the brake pad and the brake drum is canceled, the brake pad carrier being elastically deformable for the transfer from the freewheeling state into the braking state.