Angle Grinder Circuit Board Extraction for Thermal Management
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Solution Overview
Problem
Current angle grinders have complex structures leading to long assembly times and poor user accessibility for detachment and repair, along with heat dissipation issues affecting the circuit elements and overall tool performance.
Innovation Solution
The design includes a compact structure with a brushless motor, transmission mechanism, and a circuit board assembly, featuring a cooling element and fan for efficient heat dissipation, along with a clamping device and handle configuration for easier assembly and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the angle grinder uses a complex structure design, then it can achieve more functions, but the assembly time becomes too long and detachment and repair are not facilitated
Solution Approach 1:
The angle grinder is divided into modular components including a motor assembly, a handle assembly, and a grinding head assembly that can be independently assembled and disassembled. The motor assembly includes a motor housing, stator, and rotor that can be separated for repair. The handle assembly with trigger switch and battery compartment can be detached independently, enabling quick assembly and disassembly while maintaining full functionality.
2Adaptability or versatility
If the angle grinder uses a complex structure design, then it can achieve more functions, but the ease of repair by user becomes poor
Solution Approach 1:
The device is segmented into user-accessible modules such as the battery compartment, switch assembly, and grinding head that can be easily removed and replaced by users without requiring disassembly of the entire device. Each module is designed with external mounting features that allow tool-free attachment and detachment.
3Extent of automation
If the circuit board is provided in the housing for controlling the motor, then the motor control function is achieved, but the circuit element generates a lot of heat affecting the use time
Solution Approach 1:
The circuit board assembly is extracted from the motor housing and mounted on the external handle assembly. This separates the heat-generating electronic components from the motor compartment, allowing independent thermal management. The circuit board is positioned where ambient airflow can dissipate heat more effectively, and it does not interfere with motor cooling.
4Duration of action of moving object
If the heat cannot be dissipated in time from the circuit element, then the use time of the circuit element and the whole angle grinder may be effected
Solution Approach 1:
The circuit board assembly is positioned in the handle section away from the motor housing, placing it in a location with better natural convection and airflow for passive heat dissipation. This extraction allows the circuit elements to operate in a cooler environment, extending their operational life and reliability.
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 simplifies assembly and disassembly, enhances user safety, and effectively manages heat dissipation, improving the overall performance and usability of the angle grinder.
Implementation Method 1
a cooling element and fan for efficient heat dissipation
Data Source
AI summary
An angle grinder includes a housing formed with a handle, a clamping device for mounting a grinding disk, an output shaft for driving the clamping device to rotate, a brushless motor being provided with a motor shaft, a transmission mechanism for transmitting power between the motor shaft and the output shaft, and a circuit board assembly for providing electricity to the brushless motor. The clamping device is disposed outside of the housing and connected with the output shaft. The output shaft is at least partially disposed inside of the housing and connected with the transmission mechanism. The brushless motor is arranged between the transmission mechanism and the circuit board assembly in a direction substantially parallel to the motor shaft, and the motor shaft is disposed along a direction substantially perpendicular to the output shaft.