Multi-part Brake Drum Segmentation for Thermal Warping
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Solution Overview
Problem
Brake drums in utility vehicles experience warping due to thermally induced tensions, leading to premature wear and increased risk of cracking, as the intended friction area fails to maintain complete contact with brake pads.
Innovation Solution
A brake drum design featuring a friction section and a connection section with transmission structures that engage positively and/or non-positively, allowing for torque transmission while minimizing thermal deformation through ceramic coatings and radially displaceable components, and a modular construction to reduce mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a brake drum is made as a single-piece structure, then manufacturing is simpler, but thermal deformation causes warping that prevents complete contact between the friction area and brake pad
Solution Approach 1:
The brake drum is divided into multiple independent sections (first brake drum section, second brake drum section, third brake drum section) that are not rigidly connected. This segmentation allows each section to independently accommodate thermal expansion and contraction, preventing warping while maintaining complete contact between the friction area and brake pad.
2Strength
If the brake drum is rigidly connected to maintain structural strength, then mechanical strength is improved, but thermal-induced warping increases causing premature wear and cracking
Solution Approach 1:
The brake drum employs a dynamic connection structure where the first, second, and third brake drum sections can move relative to each other in response to thermal changes. This dynamic adaptability allows the structure to maintain strength while accommodating thermal deformation, preventing warping-induced wear and cracking that would otherwise reduce service life.
3Power
If the friction area is made large to improve braking performance, then braking torque is increased, but thermal deformation causes non-uniform contact reducing effectiveness
Solution Approach 1:
The friction area is distributed across multiple segmented brake drum sections (first, second, and third sections), each capable of independent thermal movement. This segmentation maintains large total friction area for high braking torque while ensuring uniform contact across all sections by allowing each to adapt independently to thermal deformation.
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 design minimizes warping effects, reduces wear, and prevents cracking by ensuring consistent contact between the brake drum and brake pads, enhancing braking performance and extending the lifespan of the brake drum.
Implementation Method 1
at least parts of the friction section and/or the connection section can be provided with a ceramic coating. This can impede heat conduction, especially between the friction section and the connection section.
Implementation Method 2
The friction surface can in particular be designed in such a way that it is at least partially conical about the axis of rotation. In this way, the removal of dirt, impurities and/or moisture can be achieved or improved
Data Source
AI summary
A brake drum for utility vehicles configured to mount rotatably about an axis of rotation and including a friction section and a connection section, wherein the friction section includes a friction surface and a plurality of transmission structures, wherein the connection section comprises at least one mounting surface and a plurality of transfer structures, wherein the transfer structures engage positively and/or nonpositively in the respective complementary transmission structures so that a torque about the axis of rotation can be transmitted positively, and wherein the mounting surface serves to fix the brake drum indirectly or directly to a hub.