Angle Grinder Dust Separator Without Filter
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Solution Overview
Problem
Hand-held power tools, such as angle grinders, face issues with dust particle contamination in the cooling air flow, which can lead to debris accumulation and impair tool functionality, particularly during metal machining, causing potential short circuits and damage.
Innovation Solution
A dust protection unit is integrated into the hand-held power tool to reduce dust particles in the air flow without using a filter, designed as a dust separator that diverts and separates dust particles from the air flow before it enters the tool, ensuring effective dust reduction and prevention of debris accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter is used to reduce dust particles in the air flow, then dust reduction effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and removes the filter component from the dust protection system, achieving dust reduction through alternative means (cooling air flow dynamics and dust separator) without relying on traditional filtering elements, thereby simplifying the device structure
Solution Approach 2:
The patent introduces a dust separator as an intermediary device that uses cooling air flow dynamics to separate dust particles from the air stream, acting as a mediator between the air inlet and the internal components without requiring a traditional filter
2Reliability
If a dust filter is installed to prevent debris accumulation, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent removes the complex filter assembly from the design, simplifying manufacturing processes while maintaining reliability through the dust separator mechanism that uses cooling air flow to naturally separate and remove dust particles
Solution Approach 2:
The cooling air flow itself serves the dual purpose of cooling the motor and simultaneously separating dust particles through its dynamic flow characteristics, eliminating the need for separate filter maintenance and replacement operations
3Temperature
If cooling air flow is increased to improve cooling effectiveness, then temperature reduction is improved, but dust particle contamination increases
Solution Approach 1:
The patent converts the harmful effect of increased air flow (which would normally bring in more dust) into a beneficial effect by using the cooling air flow dynamics themselves to separate and remove dust particles, making the increased air flow beneficial for both cooling and dust removal
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 dust particles in the air flow, preventing debris from entering the tool and minimizing the risk of short circuits and damage, thereby enhancing the tool's operational reliability and longevity.
Implementation Method 1
a dust protection unit (45) for reducing, especially without using a filter, dust particles in the air flow (35)
Implementation Method 2
a cooling unit (33) for cooling the hand-held power tool (11) by means of cooling air flow (35)
Data Source
AI summary
A hand-held power tool, more particularly angle grinder, includes a cooling unit for cooling the hand-held power tool, a machine housing for receiving the cooling unit, and an air inlet opening for admitting an air flow. The hand-held power tool has a dust protection unit for reducing, especially without using a filter, dust particles in the air flow.