Segmented Brake Disc Fastening for Thermal Expansion Control
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Solution Overview
Problem
Existing braking assemblies for vehicles face challenges in securely coupling segmented brake discs due to thermal expansion, requiring numerous segments and complex fastening systems to manage heat-generated stress.
Innovation Solution
A braking assembly with segmented brake discs and a fastening system that includes brackets and sliding pins, allowing for thermal expansion to enhance securing forces during braking, using a combination of brackets and fastening devices to compress segments against the wheel web, reducing the number of required segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If segmented brake rings with numerous individual ring segments are used to account for thermal expansion, then thermal expansion is accommodated, but the number of segments and fastening complexity increases
Solution Approach 1:
The brake disc is divided into a limited number of segments (typically 2-4) rather than using numerous segments. This segmentation allows thermal expansion while maintaining structural integrity and reducing complexity compared to traditional designs with many more segments.
Solution Approach 2:
The fastening device utilizes thermal expansion of the brake disc segments as a parameter change. As the segments expand due to heat, the fastening device allows for this expansion while maintaining secure coupling, transforming the thermal effect from a problem into an accommodated parameter.
2Reliability
If a secure coupling of brake disc segments to the wheel web is provided, then braking performance is maintained, but the number of segments increases to account for thermal expansion
Solution Approach 1:
The brake disc is segmented into a minimal number of large segments (2-4 segments) rather than numerous small segments. This reduces the total quantity of segments while maintaining secure coupling through the fastening device that accommodates thermal expansion.
Solution Approach 2:
The fastening device acts as an intermediary between the brake disc segments and the wheel web. It provides secure coupling while accommodating thermal expansion, allowing fewer segments to maintain reliable braking performance.
3Stress or pressure
If numerous individual ring segments are used to account for thermal expansion, then thermal stress is managed, but the fastening system becomes complex
Solution Approach 1:
The fastening device is designed to accommodate parameter changes in the brake disc segments due to thermal expansion. It allows for dimensional changes while maintaining secure coupling, managing thermal stress without requiring a complex fastening system.
Solution Approach 2:
The fastening device incorporates dynamic characteristics that allow it to adapt to thermal expansion. The fastening mechanism can move or adjust slightly to accommodate the changing dimensions of the segments under thermal stress, simplifying the overall fastening system.
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 provides a secure and efficient coupling of brake disc segments to the wheel web, reducing the number of segments needed while maintaining effective braking performance under thermal stress conditions.
Implementation Method 1
The sliding pin can be configured to thermally expand to engage the wheel web during braking
Data Source
AI summary
A braking assembly can include a brake disc that may have a first segment and a second segment arranged to form a portion of a friction ring. The assembly can also include a fastening assembly that can include a first bracket that may have a first face configured to contact the wheel web and a second face opposite to the first face. The fastening assembly may also include a fastening device with a sliding pin disposed around a shaft. The first bracket may be disposed around the sliding pin and secured between the wheel web and a first component of the fastening device. The shaft may be disposed through the wheel web and the first bracket. The first component can contact the second face of the first bracket and may compress the first bracket against the wheel web to secure the first segment and the second segment to the wheel.