Ventilated Brake Disc Floating Mounting Thermal Expansion
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Solution Overview
Problem
Existing internally ventilated brake discs face difficulties in simple mounting and maintain high braking performance under mechanical and thermal loads, as the friction ring's mounting is complicated and prone to shielding due to thermal expansion, leading to deteriorated braking properties.
Innovation Solution
The use of threaded bolts with cylindrical sections that protrude radially from the brake-disc chamber, engaging with the friction ring to form an annular gap, allowing for floating mounting and unhindered thermal expansion, and featuring a cylindrical fastening section with through-holes for easy access and secure fastening, preventing the friction ring from resting on the brake-disc chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are inserted into cooling ducts to fix the friction ring, then the friction ring is secured to the brake-disc chamber, but the mounting becomes complicated and difficult to insert and remove
Solution Approach 1:
The fastening system is segmented into separate components: the brake-disc chamber with through-holes and the friction ring with recesses, allowing independent assembly and disassembly without complex interactions through cooling ducts
Solution Approach 2:
The fastening mechanism is extracted from the cooling duct system entirely. Through-holes are provided directly in the brake-disc chamber wall, allowing fastening elements to be inserted and removed independently of the cooling duct geometry
2Manufacturing precision
If the friction ring is fixed with screws in cooling ducts, then the friction ring is positioned, but thermal expansion causes shielding and deteriorates braking properties
Solution Approach 1:
The fastening system transitions from a rigid fixed connection to a dynamic adjustable connection. The friction ring can move radially and axially relative to the brake-disc chamber through the floating mounting on threaded bolts, accommodating thermal expansion and preventing shielding
Solution Approach 2:
The system allows parameter changes in position and orientation of the friction ring relative to the brake-disc chamber. The threaded bolts enable adjustment of the gap between the friction ring and brake-disc chamber to maintain optimal braking performance under varying thermal conditions
3Ease of operation
If the friction ring is mounted in the cooled state, then the mounting is simple, but during operation thermal expansion causes the friction ring to rest on the brake-disc chamber
Solution Approach 1:
The mounting system is designed to be dynamically adjustable rather than statically fixed. The floating mounting on threaded bolts allows the friction ring to move with thermal expansion while maintaining proper positioning, preventing contact with the brake-disc chamber during 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
This solution enables a simple and secure mounting of the friction ring, allowing for radial movement during thermal expansion, preventing shielding, and ensuring consistent braking performance under high mechanical and thermal loads, with the ability to accommodate high temperatures and varied crosspiece geometries.
Implementation Method 1
During operation, tensions arise between the outer circumference of the brake-disc chamber and the inner circumference of the friction ring on account of thermal expansion
Implementation Method 2
Mechanical and thermal loads are transmitted to the brake-disc chamber via the threaded bolts, which engage in the friction ring in a form-fitting manner
Implementation Method 3
a brake disc (11), in particular an internally ventilated brake disc, having at least one friction ring (12)
Data Source
AI summary
The invention relates to a brake disc, particularly an internally ventilated brake disc, having at least one friction ring (12), which is connected to a brake-disc chamber (14) via fastening elements, the fastening elements taking the form of threaded bolts (19), which have a cylindrical section (22) and a threaded section (21), which can be screwed into the brake-disc chamber (14) in such a way that the cylindrical section (22) of the threaded bolt (19) extends outward in the radial force direction over an outer circumference (25) of the brake-disc chamber (14), and that the cylindrical sections (22) engage in holding sections (34) of the friction ring (12) and take up the friction ring so as to form an annular gap (36) with respect to the brake-disc chamber (14).