Electric Scooter Controller Case with Recessed Circuit Board
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Solution Overview
Problem
Conventional electric scooter controlling systems require significant space due to the separation of the motor case and circuit board, which does not effectively reduce the overall size despite attempts to integrate the circuit board within the case.
Innovation Solution
The controlling system integrates a circuit board with a recessed portion within the case, allowing the driving shaft of the electric motor to be housed closer, reducing the case size, and incorporates a heat dissipating room filled with lubricant for enhanced heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the circuit board is integrated into the case, then the space occupation is reduced, but the case size increases due to the rectangular shape of the circuit board
Solution Approach 1:
The circuit board is nested within the case by utilizing the internal cavity space. The recess portion of the circuit board allows it to be positioned inside the case volume, effectively nesting one component within another to reduce overall space occupation.
Solution Approach 2:
The recess portion at the edge of the circuit board creates a dimensional feature that allows the driving shaft to pass through and be received. This dimensional change enables the circuit board to be positioned closer to the driving shaft, reducing the case size in the radial direction while maintaining electrical connection.
2Shape
If the circuit board is positioned closer to the driving shaft, then the case size is reduced, but heat dissipation becomes more difficult
Solution Approach 1:
The case is segmented into two functional rooms: a mounting room for the circuit board and driving shaft, and a heat dissipating room separated by a partition wall. This segmentation allows the circuit board to be positioned close to the driving shaft in the mounting room while providing a dedicated heat dissipating room for thermal management.
Solution Approach 2:
The partition wall acts as an intermediary structure that separates the mounting room from the heat dissipating room. It provides thermal isolation while allowing the circuit board to maintain its position near the driving shaft, enabling both compact sizing and effective heat dissipation through the dedicated heat dissipating room.
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
This configuration minimizes the scooter's size by positioning the circuit board closer to the driving shaft and effectively dissipates heat without additional components, improving space efficiency and thermal management.
Implementation Method 1
a heat dissipating room on an opposite side of the mounting room to dissipate a heat of the circuit board
Implementation Method 2
a lubrication system of a power assembly of an electric scooter, which provides a heat dissipating room beside the circuit board
Data Source
Figure 1
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AI summary
A controlling system of an electric scooter includes a case (10) having a mounting room (50) therein; and a circuit board (60) received in the mounting room (50) of the case (10), and having a recess portion (62) at an edge thereof. A driving shaft (16) of an electric motor (12) has at least a section in the mounting room (50) of the case (10) and received in the recess portion (62) of the circuit board. (60) It may reduce a size of the case (10).