Selectable Gear Cutting Tool for Large and Small Objects
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Solution Overview
Problem
Existing cutting tools with gears are not well suited for cutting both large and small objects efficiently, as the gear provides unnecessary complexity and additional force when cutting small objects.
Innovation Solution
A cutting tool with an actuator that allows the user to selectively engage or disengage the gear mechanism, enabling efficient cutting of both large and small objects by choosing the appropriate gear usage based on the object size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a gear mechanism is added to increase cutting force, then the cutting force is improved for large objects, but the device complexity increases and it becomes less suitable for small objects
Solution Approach 1:
The cutting tool implements a dynamic gear mechanism where the second gear section can be selectively engaged or disengaged from the second handle through an actuator. This allows the gear system to transition between locked and unlocked states, enabling the user to adapt the mechanical advantage to the cutting task at hand.
Solution Approach 2:
The cutting tool achieves multi-functionality by allowing the same tool to efficiently cut both large objects requiring high force (with gear engaged) and small objects requiring smooth operation (with gear disengaged). The actuator enables the user to select the appropriate operating mode based on the object size.
2Force
If a gear mechanism is permanently engaged, then cutting force is increased for large objects, but the ease of operation deteriorates for small objects
Solution Approach 1:
The actuator enables dynamic control of the gear engagement state, allowing the user to switch between locked and unlocked conditions based on the cutting task. This dynamic adjustment optimizes both cutting force and ease of operation for different object sizes.
Solution Approach 2:
The system changes the mechanical parameter of gear engagement (locked vs. unlocked) to adapt to different cutting requirements. By altering the engagement state of the second gear section, the tool can provide high force when needed or smooth operation when preferred.
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 actuator enables the cutting tool to provide enhanced cutting force for large objects while allowing smoother, less forceful cutting for small objects, enhancing versatility and user comfort.
Implementation Method 1
an actuator (12) which in a first position locks the second gear section (11) to rotate with the second handle (7), and which in a second position releases the second gear section from rotating with the second handle (7)
Implementation Method 2
a gear comprising a first gear section (9) extending from the first handle (6) towards the second handle (7), and a second gear section (11) provided between the second handle (7) and the second jaw member (4) for rotation around the rotation axis (10), wherein the first and second gear sections (9, 11) engage each other
Implementation Method 3
the cutting force is increased due to the gear
Data Source
AI summary
The invention relates to a cutting tool (1), comprising a jaw (2) with a first jaw member (3) and a second jaw member (4) pivotably connected to each other at a first pivot point (5). A first handle (6) has a first end (8) attached to the first jaw member (3) and a first gear section (9) extends from the first handle (6) towards a second handle (7). The second handle (7) is rotatably connected to the second jaw member (4). To obtain a cutting tool which is well suited for efficient cutting of both large and small objects, a second gear section (11) is provided between the second handle (7) to engage the first gear section (9). The second handle (7) is provided with an actuator (12) which in a first position locks the second gear section (11) to rotate with the second handle (7) and forces the second gear section (11) to rotate along the first gear section (9) to change a distance between the first (6) and second handle (7) when the second handle (7) is rotated, and which in a second position releases the second gear section (11) from the second handle (7), so that mutual rotation between the the second gear section (11) and the second handle (7) is possible.