Nested Dust Extraction Tube for Tool Bit Visibility and Vacuum
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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
A dust extracting device with a suction head and suction tube designed to fit inside the tool shaft of a tool bit, allowing for a high vacuum level and efficient dust collection, while enabling full access to the tool bit for operator review.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the suction tube is made from a stiff material and arranged outside of the tool shaft, then the structural stability is improved, but the device complexity and space occupation increase
Solution Approach 1:
The dust extracting device is nested inside the tool shaft of the tool bit. The suction tube is arranged within the hollow tool shaft, utilizing the existing space of the tool bit structure. This nesting approach provides structural stability while avoiding additional external components that would increase device complexity.
Solution Approach 2:
The tool shaft serves dual functions: it houses the cutting elements for material removal and simultaneously accommodates the dust extracting device. This multi-functionality eliminates the need for separate external dust collection structures, reducing overall device complexity while maintaining structural integrity.
2Productivity
If the flow cross-section of the suction tube is reduced to increase vacuum level, then the extraction efficiency is improved, but the device complexity increases
Solution Approach 1:
The flow cross-section of the suction tube is optimized to specific dimensions that balance vacuum generation with structural simplicity. By carefully selecting the tube diameter and length parameters within the constraints of the tool shaft, high extraction efficiency is achieved without requiring complex adjustable mechanisms or multiple components.
3Adaptability or versatility
If the maximum width of the suction head and suction tube is smaller than the inner diameter of the cutting ring, then the device can be arranged inside the tool shaft, but the suction head size is constrained
Solution Approach 1:
The suction head and suction tube are designed with maximum width smaller than the inner diameter of the cutting ring, allowing them to nest within the hollow tool shaft. This nesting configuration enables the dust extracting device to be integrated inside the tool bit without interfering with the cutting operation, achieving adaptability while maintaining adequate suction capability through optimized internal geometry.
4Area of moving object
If the dust extracting device is arranged outside the tool shaft, then the suction tube can be larger, but the operator cannot easily review the working area and tool bit
Solution Approach 1:
The dust extracting device is nested inside the tool shaft, which has a hollow structure. This internal arrangement ensures that the suction tube and head do not obstruct the operator's view or access to the working area and tool bit. The operator can easily review and monitor the cutting operation without interference from external dust collection components.
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 device effectively collects dust and debris inside the tool bit, reducing the need for protective gear and work area cleanup, and extends the life of power tools by preventing dust contact.
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
A dust extracting device (72) configured to be connected to a tool bit (71) of a power tool system that performs a defined operation of a workpiece, the dust extracting device (72) configured to collect dust and debris generated during operating the workpiece, including a suction head (84) having a body part (91) with a through-opening (92) and having a contact face (93) configured to be placed against the workpiece, a suction tube (85) having a length direction (86), a flow cross-section (Atube), and a connecting element (106) configured to be connected to the tool bit (71), wherein a maximum width (Wmax) of the suction head (84) and suction tube (85) is smaller than an inner diameter (Din) of a cutting ring (77) of the tool bit (71).