Electric Motor Cooling Device with Vibration-Isolating Abutting Part
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Solution Overview
Problem
Conventional electric motor cooling systems face reliability issues due to foreign matter adhesion on the stator and vibration-induced damage to the fan motor, with existing vibration absorption methods restricting design freedom and requiring cumbersome mounting processes.
Innovation Solution
A cooling device featuring a cylindrical cover with abutting parts that form an air blowing gap between the cover and the electric motor, using vibration-absorbing materials and a detachable design to prevent vibration transmission and simplify attachment, while isolating the soldered parts from the air blowing path to protect against foreign matter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fan motor is fastened to the electric motor by bolts or other joining members, then the fan motor can be securely attached to the electric motor, but vibration of the load apparatus is directly transmitted through the electric motor to the fan motor, causing potential damage
Solution Approach 1:
A vibration-absorbing member is introduced as an intermediary component between the fan motor and the electric motor. This member absorbs vibrations from the load apparatus before they reach the fan motor, preventing direct transmission of harmful vibrations while maintaining secure attachment. The vibration-absorbing member acts as a buffer that protects the fan motor from resonance and fatigue fracture.
2Reliability
If a vibration absorbing member is interposed between the fan motor and the electric motor, then vibration absorption performance is improved, but the degree of freedom of design of the electric motor is substantially restricted
Solution Approach 1:
The vibration-absorbing member is designed with multi-functionality to minimize its impact on design freedom. It serves both as a vibration isolation element and as a mounting structure that can accommodate various fan motor configurations. The member is configured to work with different electric motor types and sizes, making the vibration solution universally applicable without restricting design options.
3Strength
If bolts, screws, etc., are used to mount a fan motor to an electric motor, then secure attachment is achieved, but a lot of time and trouble are required for attaching/detaching the fan motor
Solution Approach 1:
The mounting structure is segmented into modular components: the vibration-absorbing member and the fan motor mounting interface. This segmentation allows the fan motor to be quickly attached and detached as a unit without requiring multiple fastening operations. The modular design enables tool-free or minimal-tool assembly and disassembly, significantly reducing attachment time while maintaining secure connection.
4Temperature
If the stator is partially exposed through the air vent to the outside of the electric motor, then cooling is achieved, but the reliability of the electric motor may decrease due to adhesion of foreign matter to the stator
Solution Approach 1:
A protective mesh or screen (thin film structure) is installed over the air vent opening. This mesh allows air to pass through for cooling purposes while physically blocking foreign matter such as cutting fluid droplets and particles from reaching the stator. The mesh maintains cooling efficiency by permitting airflow while providing a barrier that protects the stator from contamination and adhesion of harmful substances.
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
The solution effectively prevents vibration-induced damage to the fan motor, enhances design flexibility, and simplifies the attachment process, improving the torque characteristics and reliability of the electric motor cooling system.
Implementation Method 1
a fan motor which is attached to the main part so as to blow air to the inside of the main part
Implementation Method 2
the abutting part is formed from a vibration absorbing material
Data Source
AI summary
A cooling device for an electric motor, comprising a cover which has a cylindrical-shaped main part which can house the electric motor, and a fan motor which is attached to the main part so as to blow air to the inside of the main part. The cover further has an abutting part which protrudes from an inside periphery of the main part and can abut against the electric motor. The abutting part forms a gap for blowing air between the main part and the electric motor.