Hand-held Grinding Machine Ergonomic Balance and Suction
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Solution Overview
Problem
Existing hand-held grinding machines are not designed for efficient and fatigue-free operation, particularly in terms of uniform suction and ergonomic design, leading to user fatigue and inefficiencies in grinding processes.
Innovation Solution
The hand-held grinding machine incorporates a suction device with an annular or ring-shaped suction channel section that surrounds the coupling device for the transmission shaft to the tool holder, along with a planetary gear system and a pivoting tool head, allowing for uniform suction and improved ergonomic handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional suction device is used in hand-held grinding machines, then the structure is simple, but the suction uniformity is poor leading to inefficient abrasion removal
Solution Approach 1:
The suction device is segmented into multiple suction channels (first suction channel and second suction channel) that are distributed around the tool holder. This segmentation allows for localized suction at different positions, improving overall suction uniformity and grinding efficiency without requiring a completely complex new design
Solution Approach 2:
The first suction channel is arranged to surround the transmission shaft, and the second suction channel surrounds the tool holder. These channels are nested within the existing structural space of the grinding machine, utilizing the tubular rod and housing spaces. This nesting approach improves suction coverage without significantly increasing external dimensions or overall structural complexity
2Ease of operation
If the suction channel is designed to surround the transmission shaft and tool holder, then suction uniformity is improved, but the device complexity increases
Solution Approach 1:
The tubular rod serving as the holding device structure is made to serve multiple functions: it provides mechanical support for the tool head and simultaneously houses the first suction channel. The housing structure similarly provides protection and contains the second suction channel. This multi-functionality reduces the need for separate dedicated suction components, improving suction uniformity without proportionally increasing complexity
Solution Approach 2:
The suction channels are merged with the existing structural elements of the grinding machine. The first suction channel is integrated into the tubular rod, and the second suction channel is integrated into the housing. This merging approach creates uniform suction coverage around critical components while utilizing existing structural space, thereby improving ease of operation without adding significant separate components
Data Source
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AI summary
To provide a hand-held grinding machine, comprising a holding device for holding the grinding machine, comprising a drive motor and comprising a tool head, wherein the holding device comprises a substantially tubular bar with a proximal end and a distal end, wherein the drive motor is arranged at the proximal end, wherein the tool head is arranged at the distal end, wherein the grinding machine comprises a transmission shaft which connects the drive motor to a tool holder of the tool head for the transmission of torque and which runs at least in sections within the tubular bar, wherein the tubular bar comprises a grip region at which a user grips the grinding machine during grinding operation, which hand-held grinding machine permits simple, efficient and as far as possible fatigue-free grinding, it is proposed that a centre of gravity of the drive motor and a centre of gravity of the tool head are arranged on mutually opposite sides of a longitudinal axis of the tubular bar.