Electric Bicycle Motor Mounting Assembly with Adapting Pieces
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Solution Overview
Problem
Conventional motor supporting frames for electric bicycles lack stability and durability due to the weight of the motor unit and are manufacturer-specific, limiting rider choice and increasing manufacturing complexity and costs.
Innovation Solution
A motor mounting assembly featuring a motor-installation mount with a mounting frame and lateral cover, along with adapting pieces that allow for secure fastening of motor units of various specifications, enhancing stability, durability, and manufacturing efficiency while enabling rider choice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the motor unit is fastened to the motor supporting frame with multiple bolts, then the motor unit is securely fixed, but the stability and durability are insufficient due to the considerable weight of the motor unit and multiple loads
Solution Approach 1:
The motor supporting frame is divided into an upper frame and a lower frame that are separately connected to the bicycle frame, with the motor unit positioned between them. This segmentation allows each frame portion to independently bear and distribute loads, improving overall stability and durability compared to a single rigid supporting structure.
2Manufacturing precision
If the motor supporting frame is designed for a specific motor unit from a certain manufacturer, then the motor unit can be properly installed, but the manufacturing complexity and costs increase, and rider choice is limited
Solution Approach 1:
The motor supporting frame is designed with a universal structure that can accommodate motor units from different manufacturers. The upper and lower frames provide standardized mounting positions and spacing that are compatible with various motor specifications, allowing the same bicycle frame to support different motor units without requiring manufacturer-specific supporting frames.
3Ease of manufacture
If the motor unit is fixed to the motor supporting frame in a suspended manner, then the motor unit can be installed, but the stability is insufficient under multiple loads from motor driving and rider stepping
Solution Approach 1:
The upper frame and lower frame are merged into a unified motor supporting structure that works together to provide stable support. The upper frame connects to the seat tube and down tube, while the lower frame connects to the bottom bracket, creating a combined structural system that distributes loads effectively and improves overall installation stability.
Data Source
AI summary
A motor mounting assembly of an electric bicycle has a motor-installation mount, a motor unit, and at least one adapting piece. The motor-installation mount has a mounting frame and a lateral cover. The mounting frame is annular and has a first lateral side, a second lateral side, and a lateral opening disposed on the first lateral side. The lateral cover is assembled to the first lateral side and covers the lateral opening. The motor unit is received within the motor-installation mount. Each one of the at least one adapting piece has two fastening portions. One of the fastening portions of each adapting piece is connected to the motor unit. The other fastening portion is clamped between and is connected to the lateral cover and the mounting frame.