Brake Disk Hub Connection Thermal Insulation
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Solution Overview
Problem
Existing brake disc/hub connections suffer from significant heat transfer between the brake disc and hub, which reduces cooling efficiency and can lead to increased frictional heat-related issues, such as cracking, due to direct contact and restricted ventilation.
Innovation Solution
The implementation of C-shaped intermediate elements with locking pins and low thermal conductivity materials or sleeves minimizes direct contact between the brake disc and hub, enhancing ventilation and reducing heat transfer by providing a non-contact, thermally insulating interface, while maintaining axial security through leaf springs or two-part stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct contact between brake disc and hub is used for axial securing, then axial security is improved, but heat transfer increases and cooling efficiency deteriorates
Solution Approach 1:
The patent introduces intermediate elements as mediators between the brake disc and hub. These intermediates carry the brake disc without direct contact to the hub, thereby preventing heat transfer while maintaining axial security. The intermediates act as thermal insulators that allow the brake disc to be secured axially through leaf springs while preventing conductive heat paths to the hub.
2Temperature
If intermediate elements are used to prevent heat transfer, then cooling efficiency is improved, but axial securing capability deteriorates
Solution Approach 1:
The intermediate elements serve as mediators that simultaneously enable thermal isolation and mechanical support. They are positioned between the brake disc and hub to prevent direct thermal contact while allowing the leaf springs to attach to them for axial securing, thus fulfilling both functions without compromise.
Solution Approach 2:
The connection system is segmented into distinct functional components: intermediate elements for thermal isolation, leaf springs for axial securing, and support elements for torque transmission. This segmentation allows each component to optimize its specific function without interfering with others, particularly enabling thermal isolation while maintaining securing capability through the spring elements.
3Reliability
If stop elements are used for axial securing, then axial position is improved, but ventilation and cooling are restricted
Solution Approach 1:
The intermediate elements act as mediators that enable axial positioning through leaf springs without creating obstacles to ventilation. By carrying the brake disc away from direct contact with the hub stop, they allow air to flow freely through the ventilation channels while the spring elements maintain axial position, thus resolving the conflict between positioning and cooling.
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 solution effectively reduces heat transfer and enhances cooling efficiency, minimizing the risk of brake disc cracking and maintaining secure torque transmission, even under vibration loads, by creating a thermally insulating and ventilated interface between the brake disc and hub.
Implementation Method 1
The intermediate elements, which can be designed as a wire clip or as a sintered part, are C-shaped... made of a material with low thermal conductivity, for example stainless steel
Implementation Method 2
Each C-shaped intermediate element 5 has a locking pin 11 adjoining each of the short legs 9, which extend in the longitudinal direction of the hub 2
Implementation Method 3
the brake disc is braced against a stop on the hub with leaf spring elements
Implementation Method 4
leaf springs which are attached to the support webs or the cams of the hub and which, on the other hand, cover the support elements of the brake disc
Implementation Method 5
air intake for cooling the internally ventilated brake disc
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A brake disk/hub connection for connecting an inner-ventilated brake disk (1) to a hub (2) having a hollow-cylindrical section, with the following characteristics: a) the brake disk (1) on the inner circumference has support elements (4), b) the hub (2) is provided with cams (6) on the outer circumference of the hollow-cylindrical section, the cams reaching between the support elements (4) in the circumferential direction in order to form an anti-turn mechanism for the brake disk (1), c) intermediate elements (5) are provided between the cams (6) and the associated support elements (4) for torque transmission, is configured such that the intermediate elements (5) are configured as brackets, which are slid on associated supporting ribs (3) provided on the hollow-cylindrical section of the hub (2) in the axial direction and which rest axially secured in the slide-on direction against shoulders (8) provided on the supporting ribs (3) and forming a stop each, wherein the supporting ribs (3) in the covering region with the brake disk (1) form the cams (6).