Cutting Tool Electric Component Cooling via Blade Airflow
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Solution Overview
Problem
Existing cutting tools face challenges in effectively cooling electric components due to space restrictions and complex air introduction passages required for motor cooling air to reach these components.
Innovation Solution
The cutting tool design positions electric components within the blade case, where they can be cooled by air flow produced by the rotating cutting blade, eliminating the need for complex air introduction passages and allowing efficient cooling without space limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electric components are cooled by motor cooling air in the handle space, then cooling function is provided, but design complexity increases due to required baffle plate modifications and complex air introduction passages
Solution Approach 1:
The electric components are extracted from the handle space and relocated to the blade case space. This extraction eliminates the need for complex air introduction passages through the handle, as the components are now positioned where the rotating blade naturally generates cooling airflow.
Solution Approach 2:
The rotating cutting blade serves a dual function: cutting the workpiece and generating cooling airflow for the electric components. The blade's rotation naturally creates airflow that cools the components without requiring additional cooling devices or complex passage design.
2Volume of moving object
If electric components are stored in the handle space, then space utilization is improved, but cooling effectiveness deteriorates due to space restrictions and complex passage requirements
Solution Approach 1:
Electric components are taken out from the handle space and relocated to the blade case. This relocation improves cooling effectiveness by placing components in a space where airflow is naturally generated by the rotating blade, without the spatial constraints of the handle.
Solution Approach 2:
The components are relocated from the handle dimension to the blade case dimension, utilizing the spatial volume around the rotating blade. This dimensional change allows direct exposure to the dynamic airflow generated by blade rotation, significantly improving cooling effectiveness.
3Temperature
If complex air introduction passages are provided to cool electric components, then cooling function is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
By extracting electric components from the handle and placing them in the blade case, the invention eliminates the need for complex air introduction passages. The components are positioned where they can be directly cooled by the airflow generated during normal blade operation, greatly simplifying manufacturing.
Solution Approach 2:
The rotating blade's airflow generation function is extended to serve dual purposes: cutting the workpiece and cooling the electric components. This multi-functionality eliminates the need for separate cooling passages and devices, reducing manufacturing complexity and cost.
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 design enables effective cooling of electric components using the air flow from the rotating cutting blade, improving cooling efficiency and maintaining a compact tool structure without additional cooling devices.
Implementation Method 1
An electric component is disposed within the blade case at a position capable of being cooled by a flow of air produced by the rotation of the rotary cutting blade
Data Source
AI summary
A cutting tool includes a tool unit including an electric motor, a rotary cutting blade rotatably driven by the electric motor, and a blade case covering at least apart of the rotary cutting blade. An electric component is disposed within the blade case at a position capable of being cooled by a flow of air produced by the rotation of the rotary cutting blade.