Wheel Hub Gear Shift Control Ring for Compact Electric Switching
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Solution Overview
Problem
Existing bicycle speed change devices have complex structures, numerous components, high costs, and large volumes, making them inefficient and unsuitable for industrial use.
Innovation Solution
A compact electrical control apparatus for an internal wheel hub speed change device with a simplified structure, featuring a control base, circuit board, motor, and logic driving ring, where the circuit board receives gear switching signals to drive the motor and logic driving ring, enabling precise rotation and positioning for gear switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional electrical control apparatus for gear switching is used, then gear switching function is achieved, but structure becomes complicated with many components, high cost, large volume and heavy weight
Solution Approach 1:
The patent combines multiple components into a simplified integrated structure. The control base integrates the motor mounting, logic driving ring gear mounting, and lever connection into a single component, reducing the number of separate parts while maintaining the gear switching function. This merging approach directly addresses the contradiction by reducing structural complexity without sacrificing reliability.
Solution Approach 2:
The logic driving ring serves multiple functions: it transmits rotational motion from the motor, provides positioning through logic loops, and controls the lever for gear switching. This multi-functionality reduces the need for separate components, thereby simplifying the overall structure while ensuring reliable gear switching operation.
2Device complexity
If traditional electrical control apparatus for gear switching is used, then gear switching function is achieved, but cost increases due to many components
Solution Approach 1:
By merging multiple functions into fewer components, the patent reduces the total number of parts that need to be manufactured, assembled, and quality-checked. This directly lowers manufacturing costs while maintaining the gear switching capability.
Solution Approach 2:
The patent extracts and eliminates unnecessary components from traditional designs, keeping only the essential elements needed for gear switching. This extraction approach reduces component count and associated manufacturing costs without compromising functionality.
3Device complexity
If traditional electrical control apparatus for gear switching is used, then gear switching function is achieved, but volume and weight increase
Solution Approach 1:
The integration of multiple functions into compact components significantly reduces the overall volume of the control apparatus. The control base consolidates what would traditionally require multiple separate mounting brackets and support structures.
Solution Approach 2:
The logic driving ring is nested within the motor assembly, with the logic driving ring gear directly engaged to the motor gear. This nested arrangement minimizes the spatial footprint of the apparatus while maintaining all necessary functional elements.
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 results in a lightweight, cost-effective, and practical gear switching system that is safe and efficient for industrial use, reducing the number of components and overall volume while maintaining effective gear switching functionality.
Implementation Method 1
a motor (3), wherein the motor (3) is used to drive the logic driving ring (4) to rotate by repeated rotation and positioning
Implementation Method 2
the logic driving ring (4) is used to drive the logic loop (41) to rotate with a rotation angle and be positioned to an object position so as to control a lever
Data Source
AI summary
An electrical control apparatus of an internal speed change device of a wheel hub for gear switching has a control base and a lateral cover; a circuit board, a motor and a logic driving ring being assembled in an interior receiving space between the control base and the lateral cover; the circuit board being installed with at least one signal transmission contact joint; the logic driving ring being installed with at least one logic loop and a logic driving ring gear; wherein the circuit board is used to drive the motor so that a motor gear of the motor drives the logic driving ring to rotate; rotation of the logic driving ring drives the at least one logic loop to rotate and be positioned to an object position so as to complete electrically control gear switching.