Bicycle Brake Disc Heat Dissipation Baffle Design
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Solution Overview
Problem
Conventional bicycle brake discs lack effective heat dissipation, leading to deformation and instability during high temperatures, fluid boiling in hydraulic oil tubes, and the risk of foreign matter entry, which increases manufacturing and assembly costs and weight.
Innovation Solution
A bicycle brake disc design incorporating a heat dissipation baffle with a higher heat conductivity coefficient than the disc body, featuring a disc body, rotor carrier, and connecting elements with a heat dissipation layer, which rapidly dissipates heat and prevents foreign matter entry by creating a gap in the assembly space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional brake disc design is used without additional heat dissipation apparatus, then the manufacturing and assembly costs are low and the structure is simple, but the heat dissipation effect is poor leading to connecting hole deformation and brake instability
Solution Approach 1:
The brake disc is divided into multiple functional components: a disc body with connecting portions, a rotor carrier with carrier arms, and heat dissipation baffles. This segmentation allows each component to perform its specific function while collectively achieving effective heat dissipation without requiring a completely redesigned complex structure.
Solution Approach 2:
The heat dissipation baffle is nested within the assembly space formed between the disc body and rotor carrier. The baffle fits into the gap between these components, utilizing the existing structural space efficiently. This nesting approach adds heat dissipation functionality without significantly increasing overall structural complexity or requiring additional external protective covers.
2Reliability
If a protective cover is added outside the brake disc to prevent foreign matter entry, then the safety is improved, but the manufacturing and assembly costs and weight increase
Solution Approach 1:
The heat dissipation baffle is extracted and placed within the assembly space between the disc body and rotor carrier. This internal placement creates a physical barrier that prevents foreign matter from entering the assembly space while avoiding the need for an external protective cover. The baffle utilizes the existing structural gap, providing safety functionality without adding external weight.
3Stability of the object's composition
If the brake disc operates without effective heat dissipation, then the structure remains simple, but the connecting holes deform due to high temperature causing unstable attachment to the hub
Solution Approach 1:
Heat dissipation baffles are strategically positioned at specific locations within the assembly space where heat accumulation occurs. The baffles are placed near the connecting portions and carrier arms to locally address heat-related deformation risks. This localized approach protects critical attachment areas without requiring a complete redesign of the entire brake disc structure.
4Duration of action of stationary object
If conventional brake disc design is used, then the manufacturing cost is low, but the fluid in hydraulic oil tube boils due to poor heat dissipation reducing service life
Solution Approach 1:
The heat dissipation baffle acts as an intermediary component between the heat source (brake friction surfaces) and the hydraulic oil tube. It intercepts and redirects heat away from the hydraulic system, preventing fluid boiling and extending service life. This intermediary approach protects the hydraulic system without requiring expensive thermal management systems or modifying the oil tube itself.
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 effectively prevents brake failure due to heat-induced deformation and fluid boiling, ensuring stable attachment to the hub and reducing the risk of foreign matter entry, thereby reducing manufacturing and assembly costs and weight.
Implementation Method 1
a heat dissipation baffle with a heat conductivity coefficient greater than that of a material of a disc body, to rapidly dissipate heat
Implementation Method 2
heat is generated due to clamping friction exerted to the brake disc 1 by the brake caliper 140
Data Source
AI summary
A bicycle brake disc includes: a disc body, having connecting portions extending from an inner periphery of the disc body, and each connecting portion including a connecting hole, and first connecting elements; a rotor carrier having a center hole and carrier arms formed by extending from the center hole to an outer periphery of the rotor carrier, and each carrier arm having a through hole; each heat dissipation baffle has a first and second end portions, and fitting holes, the first and second end portions of each heat dissipation baffle respectively clamped between two adjacent connecting portions and two adjacent carrier arms, so that the connecting hole, the fitting hole, and the through hole are sequentially aligned; and the first connecting element passing through the holes to fixedly connect the disc body, the heat dissipation baffles, and the rotor carrier.