Venturi Chip Removal in Power Tool Suction Channels
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Solution Overview
Problem
Power tools like jigsaws and routers face issues with chip clogging in the suction channel and unwanted heat transfer when used without a vacuum cleaner, as there is no active removal of chips and heat dissipation.
Innovation Solution
The system divides the air flow to create a Venturi effect within the suction channel, generating negative pressure to actively remove chips and reduce heat transfer by directing part of the airflow between the suction opening and outlet end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power tool is used without a connected vacuum cleaner, then the device can be used more freely and portably, but chips accumulate in the suction channel leading to blockage
Solution Approach 1:
The system uses its own air flow to clean the suction channel, making the cleaning function self-sufficient without requiring external vacuum cleaner assistance. The air flow generated by the tool's motor serves dual purposes: driving the blower and cleaning the suction channel.
Solution Approach 2:
The invention employs pneumatic principles by using air flow dynamics to remove chips from the suction channel. The air flow creates pressure differences that actively transport chips out of the channel, preventing blockages without mechanical moving parts.
2Productivity
If the air flow is used to blow chips into the suction channel, then chip removal from the work area is improved, but heat transfers from the air flow to the power tool components
Solution Approach 1:
The air flow is divided into two separate streams: one directed through the blower channel for chip removal, and another through the suction channel for cooling and secondary chip removal. This segmentation allows the same air source to perform multiple functions simultaneously.
Solution Approach 2:
The air flow generated by the motor serves multiple functions: primary chip removal through the blower, cooling of the tool components through the suction channel, and secondary chip removal from the suction channel. This multi-functionality eliminates the need for separate cooling systems.
3Reliability
If an external vacuum cleaner is connected to actively remove chips from the suction channel, then chip blockage is prevented, but the device complexity and requirement for external equipment increases
Solution Approach 1:
The chip removal function from the suction channel is merged with the existing air flow system. The same motor-driven air flow that powers the blower also serves to clean the suction channel, eliminating the need for separate vacuum cleaner equipment or additional motors.
Solution Approach 2:
The system cleans its own suction channel using its own air flow resources, making the maintenance function self-sufficient and eliminating dependency on external vacuum cleaner equipment.
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 solution prevents suction channel blockage and reduces heat transfer to machine components, allowing the power tool to function without a vacuum cleaner while maintaining efficient chip removal and dust accumulation on the workpiece.
Implementation Method 1
another part of the available air flow between the suction opening and an outlet end in the suction channel in order to effect a removal of the chips from the suction channel by means of the Venturi effect
Data Source
Figure 1
AI summary
The tool has a removing system with a blowing channel (11) comprising a blowing opening (13) arranged in an area of the tool. A suction channel (15) has a suction opening (17) arranged with respect to the opening (13). The channels are arranged in such a manner that a part of air flow enters into the blowing channel to blow chippings in a direction of the suction opening and another part of the air flow flows between the suction opening and an emission end (19) and enters into the suction opening to remove the chippings from the suction channel by venturi-effect.