Interchangeable Brake Guard for Disc Brakes
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Solution Overview
Problem
Disc brakes in velocipedes and small motorcycles are prone to overheating, causing burns, have sharp edges that pose cutting risks, and are susceptible to the 'slicer' and 'trap' effects, leading to accidents and mechanical deformations that reduce braking efficiency.
Innovation Solution
A protection device featuring an interchangeable brake guard with a 'C'-like cross-sectional profile that covers the disc's surfaces and edges, providing partial or total coverage depending on the wheel's mounting status, and includes a central opening for secure attachment to the hub, preventing contact with hot surfaces and sharp edges, and accommodating the brake caliper's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the disc thickness is reduced to minimize weight, then the weight of the disc is reduced, but the edges become extremely sharp causing cutting risks
Solution Approach 1:
A protective cover is introduced as an intermediary element between the sharp disc edges and the user's hands. The cover completely surrounds the peripheral circumferential edge and both surfaces of the disc, providing physical isolation that eliminates the cutting hazard while allowing the disc to maintain its thin, lightweight design.
2Weight of moving object
If the disc is made thinner to reduce weight, then the weight is reduced, but the disc becomes more susceptible to mechanical deformations and chippings
Solution Approach 1:
The protective cover serves as a preventive cushion that shields the thin disc from impacts and abrasions before they can cause damage. By covering both surfaces and the peripheral edge, the system protects the disc against mechanical stresses that would otherwise lead to chippings or deformations, thereby maintaining reliability despite the reduced thickness.
3Temperature
If the disc surfaces are exposed to improve heat dissipation, then heat dissipation is improved, but the risk of burns to users increases
Solution Approach 1:
The protective cover acts as a thermal intermediary that physically separates the user's skin from the hot disc surfaces. While the disc itself remains exposed for heat dissipation, the cover prevents direct contact between the user and the heated surfaces, thereby eliminating the burn hazard while maintaining effective thermal management.
4Temperature
If the disc is designed with through-holes to improve heat dissipation and reduce weight, then heat dissipation and weight reduction are improved, but the edges of the holes become additional sharp edges increasing cutting risks
Solution Approach 1:
The protective cover provides comprehensive mediation by extending to cover not only the outer peripheral edge but also the edges of all through-holes in the disc. This complete enclosure eliminates exposure to all sharp edges while preserving the heat dissipation benefits of the through-hole design and the weight reduction achieved by removing material.
Data Source
Figure 1~2
Figure 3~3A
Figure 4
AI summary
A protection device (10, 10', 10") for disc brakes of velocipedes of the racing bike, mountain bike, city bike, electric pedal assisted cycle, and/or small motorcycle type, which comprises an interchangeable brake guard (12, 16, 18), secured to a wheel (20) of the velocipede, arrange coaxially to a disc (14) and featuring a basically "C"-like cross-sectional profile which comprises a front side (12', 16', 17) intended for covering a front surface of the disc (14), a rear side (12", 16", 17') intended for partially covering a rear surface of the disc in correspondence with a brake track which pads of a brake caliper (28) act on, and an intermediate side (12"', 16' ", 17") intended for connecting said front side (12', 16', 17) and rear side (12", 16", 17') to each other and for covering a peripheral circumferential edge of the disc (14), said brake guard (12, 16, 18) comprising a central opening or hole (13, 15, 29) shaped for a quick coupling and an anti-rotation of said brake guard with respect to an axle (40) of a hub (42) of the wheel (20) which the protection device is secured to.