Dual-Mode Blade Lifting in Power Cutting Tools
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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 lack efficient switching between manual and electric operation modes.
Innovation Solution
A power tool with a cutting unit that moves between two positions under a driving device, implementing blade lifting and cutting motions in two modes, with adjustable blade lifting times and speeds, and an operational switch to select between these modes, enhancing cutting efficiency and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade lifting time is shortened to improve cutting efficiency, then productivity increases, but the cutting unit may not have sufficient time to reset to the first position, affecting cutting quality
Solution Approach 1:
The patent implements dynamic blade lifting time adjustment by providing two distinct modes: first mode with a shorter blade lifting time for high-efficiency cutting of softer materials, and second mode with a longer blade lifting time for ensuring complete reset and high-quality cutting of harder materials. The control unit dynamically selects the appropriate mode based on operational requirements, allowing the system to adapt between speed and quality as needed.
2Productivity
If the power tool operates in high-speed mode to improve productivity, then cutting efficiency increases, but the device complexity increases due to multiple operation modes and control mechanisms
Solution Approach 1:
The patent changes the time parameter of blade lifting motion by providing two distinct blade lifting time settings (first blade lifting time and second blade lifting time). This parameter change allows the same cutting unit to operate in different efficiency modes without requiring additional hardware components, thereby improving productivity while minimizing increases in device complexity.
Solution Approach 2:
The control unit is designed to universally manage multiple operation modes within a single integrated component. It can select between first mode and second mode based on the selected blade lifting time, and also control the blade lifting switch functionality, consolidating multiple control functions into one unit rather than requiring separate components for each function.
3Adaptability or versatility
If the blade lifting switch is designed with multiple positions to select different blade lifting modes, then adaptability improves, but the ease of operation decreases due to more complex switch operation
Solution Approach 1:
The patent combines the blade lifting mode selection function with the blade lifting activation function into a single integrated switch. The blade lifting switch serves dual purposes: it can be moved to different positions (first position, second position, or middle position) to select different blade lifting modes, and it also activates the blade lifting motion when moved from the middle position. This merging reduces the number of separate controls needed and simplifies the overall operation.
Data Source
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AI summary
A power tool includes a housing including a support portion; a cutting unit for cutting a target object; 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.