Bicycle Magnetism Generator Nesting Between Rotor and Hub
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Solution Overview
Problem
Existing bicycle wheel rotation state detection technologies face challenges in effectively detecting the rotation state while minimizing contact with foreign matter and maintaining stability between the disc brake rotor and hub.
Innovation Solution
A bicycle magnetism generation device is configured to be partially arranged between the disc brake rotor and hub, utilizing a base with contact surfaces to restrict movement and a magnetism generator supported by a plate member, which includes an annular portion and projections to minimize enlargement and stabilize the device, allowing for detection of the wheel's rotation state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the magnetism generation device is arranged close to the wheel for accurate rotation detection, then measurement precision is improved, but the device contacts foreign matter such as pebbles and sand, worsening reliability
Solution Approach 1:
The magnetism generation device is nested within the space between the disc brake rotor and hub, utilizing the existing structural cavity. The base is inserted through the central hole of the disc brake rotor, positioning the magnetism generator close to the wheel for accurate detection while the disc brake rotor serves as a protective outer shell that prevents foreign matter contact.
Solution Approach 2:
The disc brake rotor acts as an intermediary protective barrier between the magnetism generation device and foreign matter. The base contacts both the disc brake rotor and hub, creating a stable mounting position that maintains detection accuracy while the disc brake rotor structure shields the sensitive magnetism generator from pebbles, sand, and other contaminants.
2Stability of the object's composition
If the magnetism generation device is arranged between the disc brake rotor and hub for stable positioning, then device stability is improved, but the axial dimension of the bicycle is enlarged, worsening compactness
Solution Approach 1:
The base is inserted through the central hole of the disc brake rotor, nesting the magnetism generation device within the existing axial space between the disc brake rotor and hub. This utilizes the available cavity without requiring additional axial length, maintaining bicycle compactness while achieving stable positioning through contact with both the disc brake rotor and hub.
3Ease of manufacture
If the base is shaped to facilitate easy arrangement between the disc brake rotor and hub, then ease of manufacture is improved, but the structural complexity increases, worsening device simplicity
Solution Approach 1:
The base features localized structural variations - a central hole for insertion through the disc brake rotor, contact surfaces for stable mounting, and projection shapes for positioning. These local quality modifications enable easy arrangement and stable positioning without requiring complex overall base structure, maintaining device simplicity while facilitating manufacture.
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 enables effective detection of the bicycle wheel's rotation state while reducing contact with foreign matter and maintaining stability, ensuring reliable operation without enlarging the bicycle's axial dimension.
Implementation Method 1
a magnetism generator (52) generating magnetism
Data Source
AI summary
A bicycle magnetism generation device and a disc brake adapter are configured to allow a rotation state of a bicycle wheel to be detected in a suitable manner. The bicycle magnetism generation device includes a magnetism generator generating magnetism. In a state where the disc brake rotor is coupled to a hub of a bicycle, the bicycle magnetism generation device is at least partially arrangeable between the disc brake rotor and the hub.