Bicycle Hub Assembly With Movable Cable Protector
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Solution Overview
Problem
Existing hub assemblies for human-powered vehicles lack effective mechanisms to manage cables and restrict rotation, leading to potential interference and inefficient power transmission during pedaling and coasting.
Innovation Solution
A hub assembly featuring a cable protector that can pivotally move between two positions, with a wire rod design allowing the cable to be restrained in an angled position, and a rotation restriction part that is detachably attached to the hub axle, ensuring proper alignment and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cable is allowed to extend freely along the rotational center axis, then the cable can be pulled easily during pedaling, but the cable may interfere with rotating components during hub rotation
Solution Approach 1:
The cable protector is designed to be movable between a first position (where the cable extends freely along the rotational center axis for easy pulling) and a second position (where the cable is restrained at an angled position to prevent interference). This dynamic repositioning allows the system to adapt between different operational states: pedaling mode requiring cable tension and coasting mode requiring cable protection.
Solution Approach 2:
The cable protector acts as an intermediary component between the cable and the rotating hub components. It provides a mechanical barrier that can be positioned to either allow cable movement or prevent cable interference with rotating parts, effectively mediating between the cable's operational needs and the hub's rotational safety.
2Object-affected harmful factors
If a fixed cable protection mechanism is used, then cable interference is prevented, but the device complexity increases and ease of operation decreases
Solution Approach 1:
Instead of a fixed protection mechanism, the patent employs a movable cable protector that can transition between positions. This dynamic approach reduces overall device complexity by using a single movable component rather than multiple fixed protective structures, while maintaining effective cable interference prevention when needed.
Solution Approach 2:
The cable protector is designed to be manually operable by the user, allowing them to switch between protection modes as needed. This self-service capability eliminates the need for complex automated control systems, reducing device complexity while maintaining effective cable protection when required.
3Stability of the object's composition
If the cable protector is rigidly mounted, then structural stability is improved, but ease of installation and adjustment decreases
Solution Approach 1:
The cable protector employs a pivotal mounting mechanism that provides rotational stability when in position, while allowing for relatively easy installation and removal. The pivot connection maintains structural stability during operation while simplifying the manufacturing and assembly process compared to rigid fixed-mounting solutions.
Data Source
AI summary
A hub assembly is provided for a human-powered vehicle. The hub assembly includes a hub axle, a hub body, a cable and a cable protector. The hub axle has a first axial end and a second axial end. The hub body is rotatably mounted on the hub axle to rotate around a rotational center axis of the hub assembly. The cable has a first portion disposed inside of the hub assembly and a second portion disposed outside of the hub assembly. The cable protector is movably arranged between a first position and a second position. The second portion of the cable extends along the rotational center axis where the cable protector is in the first position. The second portion of the cable being at least partly restrained in an angled position with respect to the rotational center axis where the cable protector is in the second position.