Grounded Dust Collection Hose for Static-Safe Tool Grinding
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Solution Overview
Problem
Conventional electric tool grinding machines accumulate static electricity during dust collection, posing safety risks and requiring expensive anti-static solutions that complicate the machine structure and increase costs.
Innovation Solution
An electric tool grinding machine with a dust collecting element connected to a power ground wire through a charge conducting element, allowing electrostatic charges to be dissipated without altering the machine's structure or using anti-static devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-static dust suction pipe with conductive wire or coating is used, then static electricity can be dissipated, but the device complexity and cost increase significantly
Solution Approach 1:
The patent merges the static electricity dissipation function with the existing dust collection system by integrating a conductive element into the dust collection hose. This allows the dissipation function to be combined with the dust collection function, eliminating the need for separate anti-static components and reducing overall device complexity.
Solution Approach 2:
The dust collection hose is designed to serve multiple functions: dust collection and static electricity dissipation. By making the hose universal (capable of both functions), the patent eliminates the need for separate anti-static devices, thereby reducing device complexity while maintaining reliability.
2Reliability
If metal parts are used for dust collecting element, then static electricity is avoided, but manufacturing cost and weight increase
Solution Approach 1:
Instead of making the entire dust collecting element out of metal, the patent applies conductive properties locally by adding a conductive element or coating to specific parts of the hose. This local application of conductivity provides static electricity dissipation while keeping the rest of the structure lightweight and cost-effective.
Solution Approach 2:
The patent uses composite materials by combining non-conductive hose material with conductive elements or coatings. This composite approach allows the hose to maintain its original lightweight and cost-effective properties while adding the necessary conductive properties to prevent static electricity accumulation.
3Reliability
If anti-static dust suction device is used, then static electricity can be dissipated, but compatibility issues among brands arise
Solution Approach 1:
The patent extracts the static electricity dissipation function from the dust suction device and integrates it directly into the dust collection hose. This separation and reintegration allows the hose to independently provide dissipation functionality, making it compatible with various dust suction devices from different brands without requiring specific anti-static configurations.
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
Effectively dissipates static electricity, enhancing safety and reducing costs by eliminating the need for anti-static components, while maintaining the machine's functionality and structure.
Implementation Method 1
the charge conducting element is electrically connected to the power ground wire by one of the following: direct connection and indirect connection. When an electrostatic charge is generated on the dust collecting element, the charge conducting element conducts the electrostatic charge to the power ground wire.
Implementation Method 2
When the relative humidity of the environment is below 20%, the electrostatic voltage is more likely to exceed 10,000 volts. Such a high electrostatic voltage is likely to generate spark discharge instantaneously when the worker touches the grinding tool
Data Source
AI summary
An electric tool grinding machine with static electricity dissipation, the electric tool grinding machine includes a machine tool body, a motor disposed in the machine tool body, a power supply unit disposed in the machine tool body and connected to the motor, a grinding disc rotating with the motor, and a dust collecting element facing the grinding disc and assembled with the machine tool body. The power supply unit includes a power ground wire. The machine tool body includes a charge conducting element contacting the dust collecting element, and the charge conducting element is electrically connected to the power ground wire by one of the following: direct connection and indirect connection, when an electrostatic charge is generated on the dust collecting element, the charge conducting element conducts the electrostatic charge to the power ground wire.