Power Tool Blade Lifting Modes for Faster Yet Controlled Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shearing devices, both manual and electric, have low cutting efficiency and are inconvenient to operate, especially when dealing with objects of large hardness, and there is a lack of effective solutions for switching from manual to electric operation.
Innovation Solution
A power tool with a cutting unit that implements a blade lifting motion between two positions, featuring two modes of operation: a first mode with a shorter blade lifting time and a second mode with a longer blade lifting time, driven by a transmission device connected to an electric motor, allowing for adjustable cutting efficiency and convenience through a blade lifting switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade lifting time is shortened to improve cutting efficiency, then productivity increases, but safety and controllability deteriorate
Solution Approach 1:
The patent implements dynamic blade lifting time adjustment by providing two distinct operation modes: a first mode with a first blade lifting time and a second mode with a second blade lifting time. The control unit switches between these modes based on operating conditions, allowing the system to optimize between cutting efficiency and safety controllability dynamically rather than using a fixed lifting time
2Productivity
If the blade lifting speed is increased to improve working efficiency, then productivity increases, but the complexity of controlling the blade motion increases
Solution Approach 1:
The system dynamically adjusts blade lifting speed by switching between two operation modes with different lifting times, rather than implementing a continuously variable speed control system. This approach achieves the benefit of optimized working efficiency while avoiding the complexity of sophisticated speed control mechanisms
Solution Approach 2:
The patent changes the blade lifting time parameter between two discrete values (first blade lifting time and second blade lifting time) to optimize performance. This discrete parameter change approach simplifies the control system compared to continuous parameter adjustment, reducing device complexity while maintaining improved working efficiency
3Device complexity
If a fixed blade lifting time is used, then the device complexity is reduced, but the adaptability to different cutting requirements deteriorates
Solution Approach 1:
The system becomes dynamically adaptable by providing two distinct operation modes with different blade lifting times. The control unit can switch between the first operation mode (with first blade lifting time) and the second operation mode (with second blade lifting time) based on different cutting requirements, thereby achieving versatility without significantly increasing device complexity
Solution Approach 2:
The control unit is designed to perform multiple functions: it controls the motor, selects between two operation modes, and adapts to different cutting requirements. This multi-functionality allows a single device to handle various cutting scenarios (different materials, thicknesses, and conditions) without requiring multiple specialized devices, improving adaptability while maintaining relatively simple device architecture
Data Source
AI summary
A power tool includes a housing including a support portion, a cutting unit, and a driving device configured to drive the cutting unit, where the cutting unit moves between a first position and a second position relative to the support portion under the action of the driving device. The cutting unit implements a blade lifting motion under the action of the driving device: the cutting unit moves from the first position to the second position. The blade lifting motion includes a first mode and a second mode; in the first mode, a time for the cutting unit to implement the blade lifting motion is a first blade lifting time; and in the second mode, a time for the cutting unit to implement the blade lifting motion is a second blade lifting time; where the first blade lifting time is less than the second blade lifting time.