Tool-Free Flexible Seal for Hand Tool Dust Extraction
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Solution Overview
Problem
Existing suction devices for motor-driven hand tools, such as hammer drills, face challenges in maintaining airtightness and user-friendly maintenance, particularly due to inaccessible and tool-dependent sealing mechanisms that wear out quickly under heavy use and exposure to dust and vibrations.
Innovation Solution
A suction device design featuring a flexible, manually accessible, and tool-free replaceable sealing means, such as a flat annular disk gasket, positioned near the attachment opening, which can be rotated for extended use and held in a self-centering receptacle with slight prestress, ensuring reliable sealing and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing means is positioned deep inside the suction device, then the sealing is more protected, but the sealing means becomes inaccessible for maintenance
Solution Approach 1:
The sealing means is repositioned from a deep internal location to a location on the peripheral surface of the housing body, changing its spatial dimension from hidden to accessible. This allows the sealing means to be easily reached by users without disassembling the device, while still maintaining its sealing function through the peripheral positioning around the dust collection container opening.
2Reliability
If the sealing means is glued or insolubly fixed, then the sealing is more secure, but the sealing means cannot be easily replaced
Solution Approach 1:
The sealing means is designed with dynamic characteristics - it can be easily removed and reinstalled by users without tools. The sealing mechanism transitions from a static, permanently fixed state to a dynamic, user-replaceable state, allowing the sealing means to be removed, cleaned, or replaced as needed while maintaining secure sealing during operation.
Solution Approach 2:
The sealing means is designed to be self-serviceable by the end user. Users can independently remove, clean, and reinstall the sealing means without requiring technical expertise or special tools. This empowers users to maintain the sealing function themselves, reducing service costs and improving ease of repair.
3Duration of action of stationary object
If the sealing means is made robust for heavy use, then the sealing durability is improved, but the sealing means becomes harder to remove and replace
Solution Approach 1:
The sealing means exhibits different properties in different aspects: it is made robust and durable for withstanding heavy use, vibrations, and dust exposure during operation, while simultaneously being designed with a simple peripheral structure that allows easy manual removal. The local quality of the sealing edge provides durability, while the overall peripheral design enables ease of replacement.
4Stability of the object's composition
If the sealing means is positioned away from edges, then the sealing is more stable, but the sealing means becomes inaccessible for manual removal
Solution Approach 1:
The sealing means is positioned on the peripheral surface of the housing body, utilizing the outer dimensional space rather than deep internal positioning. This peripheral placement provides both stability for sealing function and accessibility for user interaction, allowing users to easily reach and remove the sealing means from the external surface without compromising sealing stability.
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 design enhances maintenance accessibility, reduces maintenance and disposal costs, and provides a reliable seal, extending the sealant's lifespan and improving user convenience by allowing tool-free replacement and reorientation for continued functionality.
Implementation Method 1
a flexible sealing means (30) in the axial direction in which the dust collection container (20) can be attached or attached to the housing body (4).can be removed from the housing body (4), which rests sealingly against the housing body (4)
Implementation Method 2
the sealing means (30) is arranged in a self-centering receptacle (32) in a loosely floating manner
Data Source
Figure 1
Figure 2
AI summary
There is a flexible seal at the point where the dust extraction line (10) has an inlet opening into the dust collection container. The flexible seal rests and seals against the body of the casing (4). When the dust collection container is released from the body, the seal is made accessible for manual removal, without tools. The seal is preferably spaced by 10 mm at most, from the edge of the body casing. This edge borders an opening for insertion or attachment of the dust collection container.