Actuator Thermal Coupling Between Motor Coil End and Reducer Casing
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Solution Overview
Problem
Existing actuators face challenges in effectively dissipating heat generated by the motor, which affects cooling performance.
Innovation Solution
Incorporating a heat transfer member with elasticity between the motor's coil end and the speed reducer casing to enhance heat dissipation, utilizing the motor casing and speed reducer casings for improved thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipation fins are provided on the motor casing, then heat dissipation is improved, but cooling performance is insufficient
Solution Approach 1:
The patent combines the motor casing and speed reducer casing into a thermally integrated structure, where the speed reducer casing serves as a heat sink for the motor. Heat transfer members are provided at contact surfaces between the motor stator and speed reducer casing, creating a merged thermal management system that improves cooling performance beyond what separate casings with fins could achieve.
Solution Approach 2:
Heat transfer members are introduced as intermediary components between the motor stator and speed reducer casing. These members facilitate efficient thermal coupling, acting as mediators that transfer heat from the motor to the speed reducer casing, which then dissipates heat to the surrounding environment, thereby enhancing overall cooling performance.
2Temperature
If a heat transfer member is disposed between the coil end and speed reducer casing, then heat dissipation is enhanced, but dimensional control becomes more complex
Solution Approach 1:
The heat transfer members are designed with compressible or deformable properties, allowing them to adapt to variations in assembly dimensions. By changing the physical state or dimensional parameters of the heat transfer member (e.g., using elastomeric materials that can be compressed), the system achieves reliable thermal contact without requiring extremely tight dimensional tolerances on the casings and motor components.
3Reliability
If heat transfer members are added to improve cooling, then device complexity increases, but structural integrity must be maintained
Solution Approach 1:
The speed reducer casing is designed to serve multiple functions: it provides mechanical support for the speed reducer components and simultaneously acts as a heat sink for the motor. This multi-functional design eliminates the need for separate cooling structures, reducing overall device complexity while maintaining improved cooling performance.
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 from the motor, improving cooling performance without requiring strict dimensional control and maintaining structural integrity.
Implementation Method 1
a heat transfer member having elasticity is disposed between a coil end of the motor and a speed reducer casing of the speed reducer
Implementation Method 2
a heat transfer member having elasticity is disposed between a coil end of the motor and a speed reducer casing of the speed reducer
Data Source
AI summary
An actuator includes a motor and a speed reducer that are connected to each other, in which a heat transfer member having elasticity is disposed between a coil end of the motor and a speed reducer casing of the speed reducer.