Disc Brake Protective Disc Shielding Sealing Element
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Solution Overview
Problem
Disc brake sealing elements are susceptible to damage from high temperatures and external loads, leading to reduced service life due to their temperature-sensitive materials and complex structures, which fail to provide long-term protection against contamination and wear.
Innovation Solution
A disc brake design featuring a protective disc made of metal or thermally resilient plastic, positioned between the brake pad and sealing element, which acts as a heat shield and guide for the force transmission element, with passage openings to allow moisture escape while preventing coarse contaminants from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing element is made of temperature-sensitive material to ensure flexibility and sealing effectiveness, then sealing performance is improved, but susceptibility to damage from high temperatures increases
Solution Approach 1:
A protective disc made of heat-resistant material (metal or thermally resilient plastic) is introduced as an intermediary component between the brake disc and the sealing element. This protective disc absorbs and blocks radiant heat, preventing direct thermal exposure to the temperature-sensitive sealing element while maintaining its flexibility and sealing effectiveness
Solution Approach 2:
The sealing system is segmented into multiple functional zones: the protective disc forms an outer heat-resistant barrier, while the sealing element remains contained in a protected inner region. This segmentation allows each component to operate in its optimal thermal environment
2Adaptability or versatility
If the sealing element is made highly deformable axially to compensate for axial movements, then adaptability is improved, but susceptibility to damage from external loads increases
Solution Approach 1:
The sealing element is nested within the protective disc structure, which acts as a protective shell. The protective disc contains the sealing element in a shielded environment, protecting it from external loads such as splash water, coarse dust, and stone chips while allowing the sealing element to maintain its deformability for axial movement compensation
Solution Approach 2:
The protective disc serves as a pre-positioned protective barrier that cushions the sealing element against external contaminants and loads before they can directly contact and damage the sealing element
3Reliability
If the sealing element expands further into the space between brake caliper housing and brake disc with increasing wear, then sealing coverage is improved, but exposure to external loads increases
Solution Approach 1:
The protective disc acts as a permanent intermediary barrier that extends with the brake wear, ensuring the sealing element remains protected even as it expands into the exposed region. The protective disc maintains a consistent protective boundary between the sealing element and external contaminants
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 protective disc enhances the durability of the sealing element by shielding it from radiant heat and external loads, improving the disc brake's resistance to damage and maintaining effective sealing over its service life.
Implementation Method 1
the protective disc enhances the durability of the sealing element by shielding it from radiant heat
Implementation Method 2
a sealing element having a first end region opposite the brake caliper housing and a second end region opposite the power transmission element, the power transmission element being fixed, the sealing element having an axially compressible middle region, which is designed as a bellows
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The disk brake is provided with a sealing element (10) with an end region (16) lying opposite a caliper housing (2) and another end region (17). A protective cover (15) is arranged between a brake lining (12) and the sealing element surrounds a power transfer element (5) and is fixed to the caliper housing by its outer edge. An independent claim is included for a protecting cover for a disk brake.