Brake Disc Elastic Coupling to Reduce Rattling and Axial Clearance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing disc brake systems experience rattling noises due to impacts between the braking band and the disc bell, and they are not compact enough in axial direction while still needing to accommodate space for bearings and other devices.
Innovation Solution
The solution involves a disc brake system with a braking band and a bell connected by elastic elements that preload the radial teeth of the braking band against the axial teeth of the bell, minimizing clearances and impacts in both axial and circumferential directions, allowing for a more compact design without reducing mechanical strength and providing space for wheel hub components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If radial teeth and axial teeth are used to connect braking band and bell, then the structure is simple and production cost is low, but rattling noises occur due to impacts between braking band and bell
Solution Approach 1:
The patent introduces elastomeric elements positioned between the braking band and bell to absorb impacts before they occur. These elastomeric cushions are pre-installed in the connection system to prevent rattling noises generated by direct metal-to-metal impacts between the braking band and bell during operation.
2Ease of operation
If clearance is guaranteed in axial direction by axial retaining ring and abutment, then braking band can slide axially to orient coplanar to pads, but axial impacts occur between braking band and bell
Solution Approach 1:
Elastomeric elements are positioned between the braking band and the axial abutment surface of the bell to cushion axial impacts. This allows the braking band to maintain the necessary axial clearance for proper positioning and coplanar orientation with the brake pads, while simultaneously preventing harmful axial impacts during operation.
3Volume of moving object
If disc brake system is made compact in axial direction, then space for wheel hub components is increased, but clearance between braking band and bell may be insufficient
Solution Approach 1:
The elastomeric elements are designed with optimized dimensions and positioning to provide adequate cushioning within the compact axial space. This allows the disc brake system to achieve a reduced overall axial dimension while still maintaining sufficient clearance for proper braking band positioning and coplanar orientation with the brake pads.
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 design significantly reduces rattling noises and minimizes axial and circumferential clearances, enabling a more compact axial dimension while maintaining mechanical strength and accommodating space for wheel hub components, ensuring silent operation and efficient heat dissipation.
Implementation Method 1
a plurality of elastic elements (11), suitable to elastically preload the braking band (2) with respect to said bell (6)
Data Source
AI summary
A disc has a braking band, a bell and elastic elements. The braking band has a plurality of radial teeth projecting from a radially internal edge portion, delimiting a plurality of band seats. Each radial tooth has a radially internal edge surface, a first and a second axial tooth side, and at least one circumferential side. A plurality of axial teeth project delimiting a plurality of bell seats. The plurality of radial teeth is housed in the plurality of bell seats. The internal bell surface is aligned with the radially internal edge surface of each radial tooth. Each elastic element is removably connected to the axial teeth and embraces a portion of first and second axial tooth sides and of circumferential side of the radial teeth of the braking band, elastically preloading the radial teeth with respect to the bell.