Angle Grinder Dust Hood With Pivoted Tool Exposure
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Solution Overview
Problem
Existing dust extraction devices for electric tools, such as angle grinders, often lack a secure and adjustable mechanism for attaching the dust extraction hood, leading to inefficient dust collection and user convenience issues.
Innovation Solution
A dust extraction device with a hood that uses an angular metal strip with a short and long leg for secure attachment, a pivot bearing positioned to allow a segment of the processing tool to protrude through the working opening, and an adjustable shaft cover made of elastic material for accommodating various power tools, along with a base plate that can pivot to adjust the size of the processing tool's segment and be locked in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dust extraction hood is attached to the power tool using existing methods, then the attachment can be made, but the attachment lacks security and adjustability leading to inefficient dust collection
Solution Approach 1:
The dust extraction hood is designed with a pivotable connection to the base plate, allowing it to be adjusted to different angular positions. This dynamic adjustment capability enables the hood to be optimized for different dust collection scenarios while maintaining secure attachment through the locking mechanism with the angled metal strip and fastening elements.
2Reliability
If the hood is fixed rigidly to the power tool, then attachment security is improved, but adaptability to different power tools and processing tool positions is reduced
Solution Approach 1:
The connection between the hood and base plate is designed to be pivotable rather than rigidly fixed, allowing the hood to be adjusted to different angular positions. This dynamic connection maintains secure attachment while providing adaptability to different power tool configurations and processing tool positions.
Solution Approach 2:
The dust extraction device is divided into separable components: the hood, the base plate, and the connection elements. This segmentation allows the base plate to be positioned relative to the power tool handle while the hood can be independently adjusted, providing flexibility and adaptability to different power tool configurations.
3Reliability
If the processing tool is completely enclosed in the hood, then dust collection is improved, but access to the tool and adjustment of processing parameters becomes difficult
Solution Approach 1:
The hood is designed to enclose only a portion of the processing tool rather than completely enclosing it. The working opening in the rear wall allows a segment of the processing tool to protrude through, providing sufficient dust collection coverage while maintaining easy access to the tool for adjustment and operation.
4Manufacturing precision
If the shaft cover is made of rigid material with fixed length, then manufacturing precision is improved, but adaptability to various power tool shaft lengths is reduced
Solution Approach 1:
The shaft cover is designed with variable axial length, allowing it to be adjusted to accommodate different power tool shaft lengths. This dynamic dimensioning provides adaptability to various power tools while maintaining precise fit through the adjustable mechanism.
Data Source
Figure 1
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AI summary
The invention relates to a dust extraction device for a power tool (12), comprising a hood (1) having a cavity (2) bounded by a rear wall (3), a narrow wall (52) and a working opening (4) and a suction nozzle (5), a shaft extension piece (7) which projects into the cavity (2) with an output end (8) to which a circular disc-shaped processing tool (9) can be attached, which is rotatably attached to the rear wall (3) by a rotary bearing (10) and which has a drive end (11) to which an output shaft (13) of the power tool (12) can be attached, and a rotation-locking element (14) which can be attached to the power tool (12) to fix the hood (1) to the power tool (12) in a rotationally fixed manner.By having the rotary bearing (10) at such a distance from the working opening (4) that a circular segment (9') of the machining tool (9) protrudes outwards through the working opening (4), the dust extraction device is usable for an angle grinder.