Pivoting Cutting Guard With Dust Extraction for Inner Corners
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Solution Overview
Problem
Existing hand-held cutting devices, such as angle grinders, face challenges with covering devices that obstruct the work area and complicate dust removal, particularly when working in inner corner areas, as they need to be dismantled for access and often hinder the cutting process.
Innovation Solution
A hand-held cutting device with a movable cover element that pivots relative to a stationary side edge cover, allowing for adjustable positions between a covering and open position, and incorporating a suction connection for dust extraction directly at the source, enhancing visibility and access to inner corner areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed cover device is used to cover the cutting tool, then safety is improved and dust extraction is enabled, but the working area is obstructed and access to inner corner areas is hindered
Solution Approach 1:
The cover element is made movable instead of fixed, allowing it to pivot between a closed position for safety and an open position for access to inner corner areas. This dynamic design resolves the contradiction by enabling both safety coverage and operational accessibility at different times.
Solution Approach 2:
The cover device is divided into a stationary side edge cover and a movable cover element that can be independently positioned. This segmentation allows the stationary part to maintain safety coverage while the movable part can be opened for access to difficult-to-reach areas.
2Device complexity
If a fixed cover device is used, then dust extraction structure is simplified, but the suction port cannot maintain optimal position relative to the cutting tool
Solution Approach 1:
The suction port is positioned on the movable cover element, which pivots to maintain the suction port's optimal position relative to the cutting tool during operation. This dynamic positioning ensures effective dust extraction without requiring a complex adjustable suction system.
3Ease of operation
If the cover element is made movable to improve access, then working area accessibility is improved, but the device complexity increases
Solution Approach 1:
The cover device is segmented into a simple stationary side edge cover and a movable cover element with a straightforward pivot connection. This segmentation provides the needed mobility for access to inner corners while keeping each component relatively simple in design.
Solution Approach 2:
The cover element can be manually positioned by the operator without requiring complex actuation mechanisms. The simple pivot design allows the cover to be easily moved to the needed position, reducing the complexity of control systems.
4Productivity
If the suction port is positioned on the movable cover element, then dust extraction efficiency is improved, but the device complexity increases
Solution Approach 1:
The suction port is merged with the movable cover element, combining the dust extraction function with the existing movable structure. This integration ensures the suction port moves with the cover to maintain optimal positioning, without requiring a separate complex positioning mechanism for the suction system.
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 solution provides improved access to inner corner areas and efficient dust extraction, reducing operator intervention and enhancing safety by maintaining the cover element in an optimal position for dust removal while allowing larger angular ranges for cutting tools, thus improving operational efficiency and safety.
Implementation Method 1
a suction port for a dust extraction device is arranged on the cover element
Data Source
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AI summary
The invention relates to a hand-held cutting device (100) that can be operated hands-free and has a tool holder (18) for a disc-shaped cutting tool (19) for making a cutting cut in a work object (W1, W2) to be machined and a drive motor arranged in a machine housing (11). (12) for driving the tool holder (18) in rotation about a tool axis (29), the manual cutting device (10) for covering the cutting tool (19) having a covering device (30) arranged on the machine housing (11) which a side edge cover (31) fixed in place on the machine housing (11) during operation of the cutting device for covering a side edge (28) of the cutting tool (19). It is provided that the covering device (30) has a pivoting axis (S) relative to the side edge covering (31) which is coaxial with the tool axis (29) or parallel to the tool axis (29) between a covering position (D) and at least one open position ( O) has a pivotable cover element (40) for covering a working section of the side edge (28) of the separating tool (19) that projects in front of the stationary side edge cover (31), the covering element (40) in the covering position (D) covering a larger part of the working section of the separating tool (19) than in the open position (O) and that a suction connection (55) for a dust extraction device is arranged on the cover element (40).