E-Bike Motor Connector Assembly for Automatic Rear Wheel Mounting
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Solution Overview
Problem
The existing connector units in electric bicycles require time-consuming and potentially damaging processes for mounting and dismounting the rear wheel, as they need to be manually connected and disconnected, and are prone to damage if not loosened properly.
Innovation Solution
A motor device with a first and second connector unit that establish a form-fitted, electrical conductive connection transverse to the axis of rotation, allowing for automatic connection and disconnection when the rear wheel is mounted or removed, reducing the time and risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual connection and disconnection of connector units is used, then electrical connection between battery and motor is established, but mounting and dismounting rear wheel takes a long time
Solution Approach 1:
The patent combines the electrical connection function with the mechanical wheel mounting function by integrating connector units into the wheel assembly. When the wheel is mounted, the connectors automatically engage, establishing electrical connection between the battery and motor simultaneously, eliminating separate connection steps and reducing time loss during wheel replacement.
Solution Approach 2:
The connector units are designed to automatically establish electrical connection when the rear wheel is mounted onto the bicycle frame. The system serves itself by utilizing the mechanical action of wheel installation to trigger the electrical connection, without requiring separate manual intervention for connector engagement.
2Reliability
If connector unit is not loosened when removing rear wheel, then connection remains secure, but connector unit can be damaged
Solution Approach 1:
The connector unit is segmented into separable components that can be independently engaged and disengaged. This segmentation allows the electrical connection to be cleanly separated from the mechanical wheel mounting, enabling safe disconnection during wheel removal without forcing or damaging the connector components.
Solution Approach 2:
The patent introduces an intermediary mechanism that mediates between the wheel mounting action and the electrical connection. This intermediary allows the connection to be securely maintained during normal operation but provides a controlled release path during wheel removal, preventing direct stress on the connector that would cause damage.
3Ease of operation
If connector is positioned for accessibility, then battery and motor connection is easy, but connector may be exposed to damage or loss
Solution Approach 1:
The connector units are nested within protective housings that are integrated into the bicycle frame and wheel assembly. The connectors remain accessible for their intended function but are protected within these nested structures, preventing exposure to external damage or loss while maintaining operational accessibility when needed.
Data Source
AI summary
A motor device for an electric bicycle may include an electric motor, a first connector unit, and/or a second connector unit. The electric motor may include an axis of rotation. The first connector unit may include a first motor connector and a first connecting part. The first connecting part may surround the first motor connector regionally and/or outwardly. The first connector unit may be mounted on the electric motor and may be electrically conductively connected to the electric motor via the first motor connector. The second connector unit may include a second motor connector and a second connecting part. An electrical conductive connection may be established and released directly between the first motor connector and the second motor connector.