Motor-Driven Screw Mechanism for Power Tool Actuation
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Solution Overview
Problem
Manual operation of heavy-duty tree trimming tools leads to user fatigue, and existing electric tools lack efficient mechanisms to reduce operator effort and enhance precision.
Innovation Solution
A driving mechanism for power tools, featuring a sliding member driven by a motor, with a screw and nut system, intermediate connecting members, and a resilient member to facilitate smooth operation and adjustable angles, allowing the operation member to move between open and close positions, and a telescopic structure for extended reach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor-driven screw and nut system is used to replace manual operation, then user fatigue is reduced and cutting precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces the manual mechanical operation system with a motor-driven system. The motor rotates the screw shaft, which drives the nut to move linearly along the longitudinal axis, thereby automatically actuating the cutting blade without requiring manual force from the user. This substitution of manual mechanical operation with an automated motor-mechanism system directly reduces user fatigue while improving operational precision.
2Adaptability or versatility
If a telescopic structure is added to extend reach, then operational versatility is improved, but device complexity increases
Solution Approach 1:
The patent incorporates a telescopic structure that can dynamically extend and retract along the longitudinal axis of the power tool. This dynamic adjustment capability allows the cutting blade to reach different distances from the user, providing adaptability for various trimming scenarios. The telescopic mechanism is integrated with the motor-driven screw and nut system, which coordinates the extension and cutting actions, thereby enhancing versatility without proportionally increasing overall system complexity.
3Manufacturing precision
If intermediate connecting members and pulleys are used to transmit motion, then operational precision is improved, but device complexity increases
Solution Approach 1:
The patent employs intermediate connecting members such as cables or linkages that connect the moving blade to the nut. These intermediaries transmit the linear motion generated by the motor-driven screw and nut system to the cutting blade with high precision. Pulleys may be used to guide and tension these connecting members, ensuring smooth and accurate motion transmission. This intermediary transmission mechanism enables precise control of the cutting blade's movement while maintaining a manageable level of system complexity through efficient mechanical design.
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 mechanism reduces user fatigue by enabling efficient and precise cutting operations with reduced manual effort, allowing for adjustable angles and extended reach, enhancing the usability of power tools like tree loppers.
Implementation Method 1
a screw and a nut rotatably connected to the screw, wherein the screw is arranged to rotate with respect to a rotational axis parallel to the longitudinal axis so as to drive the nut to move along the longitudinal axis
Implementation Method 2
a resilient member arranged to restore the operation member from the first operation position to the second operation position
Data Source
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AI summary
A driving mechanism for use in a power tool and a power tool comprising the driving mechanism in connection with a motor and an operation member. The driving mechanism includes a sliding member arranged to drive the operation member, the sliding member is arranged to move between a first sliding position and a second sliding position along a longitudinal axis during an operation of the power tool so as to drive the operation member to move between a first operation position and a second operation position respectively.