Bicycle Disc Brake Layout With Reduced Disc-to-Spoke Clearance
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Solution Overview
Problem
Conventional disc brake mechanisms on bicycles result in excessive space wastage and a higher risk of collision or injury due to the large distance between the brake disc and the wheel spokes, leading to protrusion and potential damage.
Innovation Solution
A disc brake device design that reduces the distance between the brake disc and the wheel spokes by optimizing the positioning of the brake disc and wheel hub, with specific distances between the brake disc edges and the fork sheet, allowing for a more compact and safer installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the brake disc and the wheel spokes is increased, then the brake disc and fork sheet have sufficient clearance for operation, but more space is wasted and the protruding portions are more likely to be collided or hurt people
Solution Approach 1:
The patent changes the key parameter of the distance between the brake disc and wheel spokes from the conventional large distance to a reduced distance of less than or equal to 10mm, while simultaneously adjusting the distance between the brake disc and fork sheet to maintain adequate clearance. This parameter optimization resolves the contradiction by achieving both space efficiency and operational reliability.
2Reliability
If the distance between the brake disc and the wheel spokes is increased, then the brake mechanism has sufficient clearance, but the protruding portions are more likely to be collided to be damaged or to hurt people
Solution Approach 1:
The patent optimizes the spatial parameters by reducing the distance between the brake disc and wheel spokes to ≤10mm, which minimizes the protruding portions and thereby reduces collision risk and potential harm to people, while maintaining sufficient clearance through optimized positioning relative to the fork sheet.
3Reliability
If the brake disc is positioned farther from the wheel hub, then the brake mechanism has sufficient clearance, but the structure becomes less compact and more space is wasted
Solution Approach 1:
The patent optimizes the axial position of the brake disc relative to the wheel hub by reducing the distance to ≤10mm, achieving a more compact structure. The clearance requirement is satisfied through optimized positioning and design rather than increased distance, thereby improving structural compactness while maintaining operational reliability.
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 solution reduces space wastage and minimizes the risk of collision or injury by reducing the protrusion of the brake disc from the wheel's center plane, enhancing safety and structural efficiency.
Implementation Method 1
the disc brake stops rotating under the friction force applied by the disc brake, so that the wheel stops rotating and the purpose of braking is achieved
Data Source
AI summary
A disc brake device and a bicycle. The disc brake device comprises a bicycle frame, a mounting shaft, a wheel, and a brake disc; fork pieces is fixedly connected to a frame body; the mounting shaft is fixedly connected to the fork pieces; a hub is movably connected to the mounting shaft; spokes are provided between the hub and a rim; the brake disc is fixedly connected to the hub; the brake disc and the wheel can rotate together with respect to the mounting shaft; the brake disc has an inner surface disposed facing the spokes and an outer surface disposed facing a fork piece; a first distance, in the axial direction of the mounting shaft, between the edge of the inner surface of the brake disc farthest from the hub in the radial direction of the mounting shaft and each spoke is less than or equal to 10 mm.