Manual Grinding Tool Suction Control via Adjustable Flow Cross-Sections
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Solution Overview
Problem
Existing surface processing devices face inefficiencies in dust extraction, particularly when multiple processing surfaces are involved, leading to suboptimal suction performance and unwanted air flow over non-engaged surfaces.
Innovation Solution
A surface processing device with an adjustment device that allows for variable suction control by connecting and disconnecting inflow openings of different processing surface sections to a suction connection, enabling selective suction and reducing airflow over non-engaged surfaces through a combination of flow cross-section adjustment and latching mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If suction is applied to all processing surfaces simultaneously, then dust extraction from multiple surfaces is enabled, but suction capacity is diluted and unwanted airflow occurs over non-engaged surfaces
Solution Approach 1:
The processing surface is divided into multiple independent sections (first processing surface section, second processing surface section, etc.), each with its own inlet openings and duct connection to the suction device. This segmentation allows selective activation of suction for different surface sections, preventing suction capacity dilution while maintaining versatility for processing different surface types.
Solution Approach 2:
The patent introduces adjustable flow cross-sections and switching mechanisms that dynamically control the connection between processing surface sections and the suction device. This dynamic control enables the system to adapt suction distribution based on which surface section is currently engaged with the workpiece, ensuring optimal suction capacity is always directed to the active processing area.
2Adaptability or versatility
If multiple processing surface sections are connected to suction, then comprehensive dust extraction is achieved, but airflow is wasted over surfaces not in contact with the workpiece
Solution Approach 1:
Each processing surface section is equipped with locally controlled flow cross-section adjustment capabilities. This allows the suction system to provide localized airflow control matched to the specific needs of each surface section, ensuring that airflow is concentrated where dust generation occurs rather than being wasted over non-engaged surfaces.
Solution Approach 2:
The system incorporates switching mechanisms that respond to the operational state of different processing surface sections, actively controlling the connection to the suction device based on which surface is currently engaged with the workpiece. This feedback-based control prevents energy waste by disconnecting or reducing suction to inactive surface sections.
3Device complexity
If fixed suction connection is provided for all processing surfaces, then simplified structure is achieved, but inability to control suction distribution reduces dust extraction efficiency
Solution Approach 1:
The patent transforms the fixed duct arrangement into a dynamic system with adjustable flow cross-sections and switching mechanisms. These components enable active control over suction distribution to different processing surface sections, significantly improving dust extraction efficiency despite the increased structural complexity required to implement the control mechanisms.
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 solution enhances suction capacity and reduces unwanted airflow, allowing for precise control of suction power across multiple processing surfaces, improving dust extraction efficiency and user experience.
Implementation Method 1
inlet openings for suctioning off dust-laden dust air are arranged on the at least one processing surface
Implementation Method 2
Dust air can be suctioned from at least one processing surface via the suction connection
Data Source
AI summary
A surface processing device, in particular a manual grinding device, includes a processing body which has at least one processing surface for grinding or polishing a workpiece surface, wherein inlet openings are arranged on the at least one processing surface for suctioning off dust-laden dust air and these inlet openings are flow-connected via a duct arrangement to a suction connection to which a suction device can be connected. The surface processing device is provided with an adjustment means for adjustment of effective flow cross-sections, with which inlet openings of a first processing surface section of the at least one processing surface and inlet openings of at least one second processing surface section of the at least one processing surface are flow-connected to the suction connection, so that a suction effect on the first processing surface section and the at least one second processing surface section can be set and/or switched off.