Segmented Stator Device for Electric Bicycle Motor Heat Dissipation
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Solution Overview
Problem
Conventional motor stator devices in electric bicycles face challenges with heat dissipation and bearing set maintenance, as the heat dissipation is inefficient and the bearing sets are difficult to repair due to their placement within the motor housing.
Innovation Solution
A stator device design featuring two base seats with bearing-receiving grooves open away from each other, allowing for improved heat dissipation through a gel body attached to the stator, which is infused and solidified to position the stator relative to the base seats, facilitating easier repair of the bearing sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the motor is mounted in the bottom bracket to save space, then the appearance of the electric bicycle is not adversely affected, but heat dissipation becomes inefficient
Solution Approach 1:
The motor housing is divided into two separate base seats (first base seat and second base seat) that are spaced apart from each other. This segmentation creates openings between the base seats that allow heat to escape, solving the heat dissipation problem while maintaining the compact bottom bracket mounting configuration.
2Device complexity
If the bearing sets are disposed in the receiving space between the base seats, then the motor structure is compact, but the bearing sets become difficult to repair
Solution Approach 1:
The bearing receiving grooves are designed to be open away from each other along the axis, extracting the bearing sets from the enclosed receiving space and making them accessible from the outside. This allows bearing sets to be repaired or replaced without disassembling the motor housing, while still maintaining a compact overall structure.
3Ease of manufacture
If the top wall and surrounding wall are formed integrally, then the manufacturing process is simpler, but the upper bearing set becomes inaccessible for repair
Solution Approach 1:
The housing is segmented into two separate base seats instead of forming an integral top wall and surrounding wall. This segmentation provides access to the bearing receiving grooves while still allowing for relatively simple manufacturing of each base seat component.
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
Enhances heat dissipation efficiency by allowing heat to be conducted outwards and simplifies the repair process of bearing sets by separating them from the motor housing.
Implementation Method 1
heat generated by the motor can be conducted to the surrounding wall 112 and the tube wall 19 of the bottom bracket of the electric bicycle and then be dissipated out of the bottom bracket
Data Source
AI summary
A stator device for a motor including a shaft includes two spaced-apart base seats, a stator and a gel body. Each of the base seats includes a base member and a bearing receiving groove open away from the other one of the base seats along the axis. The base member is formed with an axial hole extending along an axis of the shaft through the base member and permitting the shaft to extend therethrough. The stator is disposed around the shaft and between the base members, and includes a core and a coil disposed around the core. The gel body is attached to and disposed around at least a portion of the stator, and is attached to one of the base seats so as to position the stator relative to the one of the base seats.