Chainsaw Battery Chamber Filtration for Dust-Free Motor Cooling
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Solution Overview
Problem
Conventional electric machine tools, such as chain saws, suffer from dust particles entering the motor receiving chamber, reducing cooling efficiency and maintenance frequency due to the accumulation of dust, which complicates maintenance.
Innovation Solution
An electric machine tool design featuring a communication path between the battery receiving chamber and the motor receiving chamber, equipped with an air filter at the inflow port, filters dust particles before they enter the motor chamber, and allows easy maintenance by removing the air filter from the outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air flows from the battery receiving chamber into the motor receiving chamber for cooling, then the cooling efficiency of the motor and control board is improved, but dust particles enter the motor receiving chamber reducing cooling efficiency and increasing maintenance frequency
Solution Approach 1:
An air filter is introduced as an intermediary component in the communication path between the battery receiving chamber and motor receiving chamber. The air filter allows air to pass through for cooling purposes while blocking dust particles generated during cutting operations, thus resolving the contradiction between maintaining cooling efficiency and preventing dust contamination.
2Object-affected harmful factors
If the air filter is positioned inside the body, then dust particles are filtered effectively, but the attachment and cleaning of the air filter becomes complex
Solution Approach 1:
The air filter is designed as a separable component that can be independently removed from the body. The inflow port is configured to allow the air filter to be detached from the outside of the body by simply removing the battery, dividing the maintenance operation from the main body structure and enabling easy access for cleaning or replacement without disassembling the entire device.
3Temperature
If the communication path is opened between battery receiving chamber and motor receiving chamber, then cooling function is enabled, but dust particles can freely enter the motor chamber
Solution Approach 1:
The air filter serves as a mediating component in the communication path, enabling the opening between the battery receiving chamber and motor receiving chamber for effective cooling while simultaneously preventing dust particles from entering the motor chamber, thus maintaining motor performance 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
Prevents dust particles from entering the motor receiving chamber, extending the time between cleanings and reducing maintenance frequency while maintaining efficient cooling of the motor and control board.
Implementation Method 1
An air filter is fitted over the inflow port of the communication path. When air flows through the air filter into the communication path, the dust particles in the air are filtered off by the air filter.
Data Source
Figure 1
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AI summary
A chain saw (1) (an electric machine tool) comprises a body (10), to which a cutter (a work tool) (20) is attached, a motor (30), and a battery (50). The body (10) has a motor receiving chamber (15), a battery receiving chamber (16) opening through an outer surface of the body (10), and a communication path (17), through which the battery receiving chamber (16) is in communication with the motor receiving chamber (15). A first air inlet opening (81) is formed between the inner edge of an opening of the battery receiving chamber (16) and the outer periphery of the battery (50) disposed in the battery receiving chamber (16). Further, an inflow port (17a) of the communication path (17) opens to an inner side surface of the battery receiving chamber (16) and an air filter (70) is fitted over the inflow port (17a).