Hollow Tool Bit Dust Extraction for Clearer Drilling Access
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Solution Overview
Problem
Existing dust extracting devices for power tools are inefficient in collecting dust and debris, and they do not allow for easy review of the working area and tool bit during operation.
Innovation Solution
The dust extracting device is arranged inside the tool shaft of the tool bit, allowing for a higher vacuum level and optimized airflow, while also enabling full access to the tool bit for operator review.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction tube is arranged outside the tool shaft, then the device complexity is reduced, but the dust extraction efficiency decreases and the working area visibility is blocked
Solution Approach 1:
The suction tube is nested inside the tool shaft, with the suction head positioned within the hollow interior of the tool shaft. This nesting arrangement allows the dust extraction system to be integrated within the existing tool structure, maximizing dust collection efficiency while maintaining a compact and simple overall device configuration.
2Productivity
If the suction tube flow cross-section is reduced to increase vacuum level, then the dust extraction efficiency improves, but the airflow resistance increases
Solution Approach 1:
The flow cross-section of the suction tube is optimized to specific dimensional parameters that balance vacuum level generation with airflow resistance. By carefully selecting the tube diameter and length parameters, the system achieves high vacuum levels for effective dust extraction while minimizing excessive airflow resistance that would reduce overall system efficiency.
3Productivity
If the suction head width is reduced to fit inside the tool shaft, then the dust collection capacity improves, but the suction area decreases
Solution Approach 1:
The suction head is designed with localized suction openings positioned at critical areas where dust generation occurs during operation. Rather than reducing the overall suction area, the suction capacity is concentrated at specific locations along the suction head that are optimally positioned to capture dust and debris generated by the tool bit, thereby maintaining high dust collection efficiency within the constrained dimensions.
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 configuration significantly enhances the efficiency of dust and debris extraction, reduces the need for protective gear and work area preparation, and minimizes dust dispersal outside the tool shaft.
Implementation Method 1
a high level of vacuum is required, and the level of vacuum can be increased by reducing the flow cross-section of the suction tube
Data Source
AI summary
An apparatus (70) configured to be connected in a rotatably fixed manner to a power tool, including a tool bit (71) including a hollow tool shaft (73) and a cutting ring (77), and a dust extracting device (72) including a suction head (84) and a suction tube (85), and a connecting device (101) configured to connect the dust extracting device (72) to the tool bit (71), wherein in the connected state of the tool bit (71) and the dust extracting device (72), the suction tube (85) is arranged inside of the tool shaft (73).