Power Tool Airflow Structure for Static Charge Neutralization
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Solution Overview
Problem
Power tools generate static electricity due to friction during operation, leading to potential damage of electronic components and system failures.
Innovation Solution
The power tool incorporates a friction portion made of materials with different electrostatic properties, arranged in a specific sequence to neutralize static charges, and may include a friction coating with multiple layers of such materials to manage static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fan blades are made of a single material, then manufacturing is simple, but static electricity accumulates causing electronic component damage
Solution Approach 1:
The fan blades are constructed using composite materials with different electrostatic properties. Specifically, the fan blades include a first portion made of a first material and a second portion made of a second material, where the materials have different positions in the electrostatic sequence. This composite structure enables different friction surfaces to generate opposite polarity static charges, which neutralize each other and prevent electronic component damage.
Solution Approach 2:
Different portions of the fan blades are assigned different material properties to achieve local optimization. The first friction surface (first portion) and second friction surface (second portion) use materials selected from the electrostatic sequence to generate complementary static charges. This local differentiation of material quality allows targeted electrostatic management at each friction interface.
2Reliability
If friction surfaces use materials far apart in electrostatic sequence, then static charge neutralization is effective, but manufacturing precision requirements increase
Solution Approach 1:
The fan blades are segmented into multiple portions, each made of different materials positioned at specific locations in the electrostatic sequence. By dividing the fan blade structure into distinct segments with controlled material assignments, the design achieves effective static charge neutralization while maintaining manageable manufacturing precision requirements through modular construction.
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 reduces static electricity to safe levels, preventing component damage and improving user experience.
Implementation Method 1
The friction portion is made of at least a first material and a second material; a position of the first material in an electrostatic sequence is located at one end of a position of the working object in the electrostatic sequence; and a position of the second material in the electrostatic sequence is located at the other end of the position of the working object in the electrostatic sequence
Data Source
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AI summary
A power tool includes a tool body. The tool body includes a friction portion capable of rubbing against a working object to generate static electricity during operation of the power tool. The friction portion is made of at least a first material and a second material; a position of the first material in an electrostatic sequence is located at one end of a position of the working object in the electrostatic sequence; and a position of the second material in the electrostatic sequence is located at the other end of the position of the working object in the electrostatic sequence.