Toggle-Link Cutting Blade Drive for Collision-Free Full Stroke
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Solution Overview
Problem
Existing electric cutting devices face challenges in preventing collisions between cutting blades due to variable cutting speeds, which can lead to blade deformation or incomplete cutting.
Innovation Solution
A cutting device with a toggle link mechanism and a drive mechanism that ensures the cutting blades come closest to each other at a predetermined position, using a ball screw and electric motor to control the opening and closing operation, thereby preventing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If braking timing is delayed to allow complete cutting, then cutting completeness is improved, but blade collision risk increases
Solution Approach 1:
The patent applies preliminary action by initiating the braking process before the cutting blades complete their full stroke. The control unit starts braking when the blades reach a predetermined position before complete closure, ensuring that even if the blades continue moving forward, they will not collide with excessive force. This preliminary braking action prevents blade collision while allowing the cutting operation to complete, resolving the contradiction between cutting completeness and collision prevention.
2Reliability
If braking timing is advanced to prevent blade collision, then blade safety is improved, but cutting completeness deteriorates
Solution Approach 1:
The patent applies dynamics by implementing variable braking control rather than a fixed braking point. The control unit adjusts the braking timing and force based on the actual cutting state and blade position. The braking process is dynamic, starting at a predetermined position and continuing with adjusted intensity to ensure both complete cutting and collision prevention, resolving the contradiction between blade safety and cutting completeness.
3Adaptability or versatility
If cutting speed varies to adapt to different materials, then cutting adaptability is improved, but blade collision control deteriorates
Solution Approach 1:
The patent applies feedback by implementing a control unit that monitors the actual blade position and cutting state in real-time. Based on this feedback, the control unit dynamically adjusts the braking timing and intensity to prevent blade collision regardless of cutting speed variations. The system receives feedback about blade position and material resistance, then adapts the braking control accordingly, resolving the contradiction between cutting adaptability and collision prevention.
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 reliably prevents collisions between cutting blades while ensuring complete cutting, maintaining consistent blade positioning regardless of varying cutting speeds.
Implementation Method 1
the drive mechanism being configured to convert movement of the movement member into an opening and closing operation of the cutting blades
Data Source
AI summary
An electric cutting device includes: a pair of cutting blades for clamping and cutting an object; an electric motor; and a drive mechanism for operating the cutting blades. The drive mechanism includes a movement member movable in a predetermined direction by a driving force of the electric motor and converts movement of the movement member into an opening and closing operation of the cutting blades. The drive mechanism is configured to: when the movement member moves in the predetermined direction, cause the pair of cutting blades to move in a direction closer to each other; and after the pair of cutting blades come closest to each other, when the movement member further moves in the predetermined direction, cause the pair of cutting blades to move in a direction away from each other.