Wheel Hub Speed Change Control Device via Magnetic Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electric speed change devices for bicycles have complex structures, numerous components, high costs, and heavy weights, making them unsuitable for high industrial utilization and economic benefits.
Innovation Solution
A control device for an internal speed change device of a wheel hub that uses a lever connected to a controlling claw sliding block, with magnetic units and a rotating gear to control axial movement via attraction or repulsion forces, reducing complexity and weight while maintaining high industrial and economic benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If prior electric speed change devices are used, then electrical controlling function is achieved, but structure becomes complex and components increase
Solution Approach 1:
The patent combines the electrical control function with the mechanical speed change mechanism into an integrated unit. The electric sliding block with magnetic units is merged with the lever and gear system, eliminating the need for separate control components and reducing overall structural complexity while maintaining automated electrical control.
Solution Approach 2:
The controlling ring serves multiple functions: it transmits rotational motion from the gear, generates magnetic fields through the first magnetic unit, and provides structural support. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device structure while maintaining electrical control capability.
2Extent of automation
If prior electric speed change devices are used, then electrical controlling function is achieved, but weight increases
Solution Approach 1:
By merging the electrical control components with the mechanical transmission elements, the patent eliminates redundant structural elements and reduces overall weight. The integrated design allows shared materials and reduced component count, directly addressing the weight issue while maintaining automated control.
3Extent of automation
If prior electric speed change devices are used, then electrical controlling function is achieved, but manufacturing cost increases
Solution Approach 1:
The integration of control and transmission functions reduces the total number of parts that need to be manufactured and assembled. This simplification directly lowers manufacturing costs while preserving the automated electrical controlling capability.
Solution Approach 2:
Multi-functional components reduce the bill of materials and assembly complexity, leading to lower manufacturing costs. The controlling ring and electric sliding block perform multiple functions, eliminating the need for separate dedicated components and reducing overall production expenses.
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 provides a simple, lightweight, and cost-effective control mechanism for the internal speed change device, enhancing safety, practicability, and industrial utilization while achieving efficient clutching operations.
Implementation Method 1
force of attraction or repulsion between the first magnetic unit of the controlling ring and the second magnetic unit of the electric sliding block drives the electric sliding block to rotate so as to drive the lever to move forwards or backwards axially
Data Source
AI summary
A control device of an internal speed change device of a wheel hub for clutching operation includes a rod; a lever installed on the rod; the lever being connected to a controlling claw sliding block; an electric sliding block installed on a lever sleeve; the lever sleeve serving to receive a back end of the lever; an electric bushing located at an outer side of the lever sleeve; a controlling ring located at an outer side of the electric bushing; and wherein force of attraction or repulsion between the controlling ring and the electric sliding block drives the electric sliding block to rotate or move axially so as to drive the lever to move forwards or backwards axially; and moving of the lever drives the controlling claw sliding block to control clutching of the internal speed change device.