Grinder Dust Hood With Segmented Chamber Airflow
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Solution Overview
Problem
Existing dust hoods for grinders face issues with high negative pressure, making it difficult to extract subsurface material and requiring excessive user force, and are prone to dust accumulation due to inadequate air pressure during suction.
Innovation Solution
Incorporating through-openings in the hood body surface facing the grinder, allowing ambient air to flow in and reduce negative pressure, along with a web separating main and segment chambers to enhance suction performance and facilitate dust detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dense curtain (e.g., brush element) is used in the dust hood, then dust extraction effectiveness is improved, but negative pressure inside the hood increases excessively
Solution Approach 1:
The hood body is divided into multiple chambers (main chamber and segment chambers) separated by webs with openings. This segmentation allows air to flow through multiple paths, distributing the pressure reduction across different zones while maintaining effective dust extraction at the curtain location.
Solution Approach 2:
The web openings act as intermediary flow paths between the segment chambers and main chamber, allowing controlled air flow that mediates between the need for strong dust extraction at the curtain and the need to limit excessive negative pressure buildup.
2Object-affected harmful factors
If a dense curtain is used in the dust hood, then dust extraction effectiveness is improved, but the force required by the user to move the grinder increases
Solution Approach 1:
Dividing the hood into multiple chambers with interconnected web openings creates multiple air flow pathways. This reduces the overall resistance to air flow compared to a single dense enclosure, thereby reducing the force required to move the grinder while maintaining dust extraction effectiveness.
Solution Approach 2:
The invention changes the pressure distribution parameters inside the hood by introducing web openings that allow pressure equalization between chambers. This modifies the airflow characteristics to reduce drag forces on the grinder body.
3Productivity
If the suction connection alone is used for dust removal, then dust extraction is achieved, but accumulated dust is not properly cleaned from the hood body
Solution Approach 1:
The web openings extract the function of dust flushing from the main suction system. By providing dedicated openings that allow air to flow into the hood body during operation, accumulated dust is continuously detached and carried away, supplementing the main suction connection's extraction function.
Solution Approach 2:
The web openings perform preliminary dust detachment action before the main suction system removes the dust. Air flowing through the web openings during operation continuously flushes accumulated dust from surfaces, preventing buildup that would otherwise require separate cleaning operations.
4Ease of operation
If multiple through-openings are provided in the hood body, then air flow and dust detachment are improved, but the structural complexity of the hood increases
Solution Approach 1:
The hood structure is segmented into modular chambers connected by webs with openings. This segmentation approach systematically organizes multiple openings into a structured pattern that improves airflow and dust detachment while maintaining manufacturing feasibility through modular construction.
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 improves handling of the grinding device by reducing negative pressure and effectively flushing out accumulated dust, enhancing suction efficiency and user convenience.
Implementation Method 1
there is a very high negative pressure due to the dust extraction
Implementation Method 2
Due to the ambient air flowing into the passage opening during the grinding operation, a negative pressure inside the dust hood is reduced
Implementation Method 3
a suction connection 40 via which a subsoil removal (dust) can be sucked out of the hood body 10
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a dust hood (100) for a grinder (200) having a gearbox neck (210) for fastening the dust hood (100) and having a hood body (10) for covering one side of a predominant part of the grinding wheel (220), wherein the dust hood (100) has a hood section (20), which is movable along the hood body (10) in the circumferential direction (U) of the hood body (10), which hood section is provided for gradual covering and exposing a remaining part of the grinding wheel (220) as required, and having an extraction connection (40) via which a substrate erosion can be extracted from the hood body (10), wherein at least one opening (13) is formed in a surface (OK) of the hood body (10) facing the grinder (200), via which the ambient air (UL) can flow into the hood body (10).