Hand Milling Machine Pivotable Guide Handle for Edge Processing
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Solution Overview
Problem
Existing hand milling machines struggle with effectively processing surfaces, especially in corner areas, due to limited adjustability and obstruction issues when approaching edges.
Innovation Solution
A hand milling machine with a pivotable guide handle that can adjust 180° to 360° relative to the working plane, allowing for both pulling and pushing operations while maintaining the tool's direction, and a locking mechanism with spherical segment recesses for secure positioning, along with a suction system for efficient material removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the guide handle is fixed relative to the working plane, then the machine structure is simple and stable, but the machine cannot process surfaces in corner areas and along edges effectively
Solution Approach 1:
The guide handle is made pivotable relative to the working plane, transforming from a fixed static structure to a dynamic adjustable one. This allows the guide handle to change its angle (e.g., 180° or 360° rotation) to access corner areas and edges while maintaining structural simplicity through a straightforward pivot connection
2Adaptability or versatility
If the guide handle is made pivotable to access corner areas, then adaptability improves, but the stability and precision of the machine during operation may be compromised
Solution Approach 1:
The locking mechanism is designed to secure the guide handle at the desired angle before machining begins. This preliminary locking action ensures that once the guide handle is positioned for corner or edge processing, it remains stable and fixed during the actual machining operation, preventing any unwanted movement that would compromise precision
3Adaptability or versatility
If the guide handle blocks the path to the edge, then the machine structure is simple, but the machine cannot process surfaces right up to the edge
Solution Approach 1:
The guide handle's pivotability allows it to be dynamically repositioned out of the way when approaching edges or corners. The operator can rotate the guide handle to a position where it no longer blocks the path to the edge, enabling the machine to process surfaces right up to the edge while maintaining simple operation through intuitive manual rotation
4Manufacturing precision
If the locking mechanism uses multiple recesses for positioning, then the positioning precision improves, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into multiple discrete recesses at specific angles around the pivot axis. Each recess represents a predetermined precise positioning point. This segmentation approach provides accurate multi-position locking capability while keeping the overall structure simple, as each recess is a basic geometric feature rather than a complex mechanism
Data Source
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AI summary
A hand-operated cutting machine (100, 200), in particular a hand-operated milling machine (100) for processing a surface of a floor or wall, comprises a machine body (10) which has a housing (11) for receiving a tool (60) rotatable about a tool axis (Aw) and a handle (12) attached to the housing (11) for holding the machine body (10) and defines a working plane (EA) to which the tool axis (Aw) extends parallel, a guide handle (20) for guiding the cutting machine (100, 200) which extends inclined at an angle (α) to the working plane (EA) and is pivotably mounted on the housing (11) about a pivot axis (As) in order to adjust the angle (α), and a locking device (30) for locking the guide handle (20) relative to the working plane (EA).