Bicycle Drive Motor Mounting Support for Theft Protection
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Solution Overview
Problem
Existing bicycle drive systems lack a simple and versatile method for mounting a drive motor and battery at the driven wheel, allowing for easy installation and theft protection, while accommodating various wheel sizes and frame types.
Innovation Solution
A support with a triangular cut-out for mounting on axles of different sizes and an oblong hole for frame mounting, combined with a common frame for the motor and battery featuring a latch for secure attachment and easy removal, allows for permanent or disengagement of the drive motor from the wheel without full disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive motor and battery are permanently fixed to the bicycle frame, then the installation is secure and stable, but the drive system cannot be easily removed for theft protection
Solution Approach 1:
The mounting system is divided into separate components: a support structure attached to the bicycle frame and a detachable drive unit with motor and battery. This segmentation allows the drive unit to be easily removed while maintaining secure mounting during operation, resolving the contradiction between mounting stability and removability for theft protection.
Solution Approach 2:
The mounting system transitions from a static permanent fixation to a dynamic removable connection. The support structure includes features that allow the drive unit to be quickly attached and detached, enabling the system to adapt between secured operation mode and theft protection mode, thus resolving the contradiction between reliability and ease of removal.
2Ease of manufacture
If the drive motor is mounted directly on the wheel, then the installation is simple, but it cannot accommodate various wheel sizes and frame types
Solution Approach 1:
The support structure is designed with universal mounting features that can accommodate different wheel sizes and bicycle frame types. The support includes adjustable elements and standardized attachment points that work across various bicycle configurations, maintaining installation simplicity while achieving broad compatibility.
Solution Approach 2:
The mounting system incorporates adjustable parameters such as position, orientation, and attachment points that can be modified to suit different wheel sizes and frame types. This allows the same basic support structure to be adapted to various bicycle configurations without complicating the installation process, resolving the contradiction between simplicity and versatility.
3Ease of operation
If the drive motor is made easily removable, then theft protection is improved, but the mounting stability and security are reduced
Solution Approach 1:
The system separates the mounting function from the drive unit, with a dedicated support structure remaining on the bicycle and the motor-battery assembly being removable. This segmentation provides both secure mounting during operation and easy removal for theft protection, resolving the contradiction between stability and removability.
Solution Approach 2:
The support structure acts as an intermediary between the bicycle frame and the drive unit. It provides stable mounting during operation while enabling easy removal of the drive unit for theft protection, thus resolving the contradiction between mounting stability and ease of removal by mediating between these two requirements.
Data Source
AI summary
A drive for a wheeled vehicle having a driven wheel is described. The driven wheel is driven by a gear. The drive includes a support mounted on an axle of the driven wheel and attached to a frame element of the vehicle. A motor is located at the driven wheel. This drive motor is mounted on the support. A second drive gear connected to the drive motor. The second drive gear is also mounted on the support. The second drive gear engages the gear fixed to the driven wheel.