Cutting Blade Pin-Lock Assembly for Fast Blade Replacement
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Solution Overview
Problem
Existing cutting devices require cumbersome procedures to replace worn-out cutting blades, involving the loosening of nuts and reattachment of blades, which is time-consuming and inefficient.
Innovation Solution
The cutting device incorporates a first and second opening in the cutting blade, connected via shaft members and movement restriction members, allowing for easy detachment and replacement of the cutting blades by removing a cover and manipulating the pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cutting blade is attached to the body with a bolt and a nut, then the cutting blade can be securely fixed to the body, but the replacement of the cutting blade becomes cumbersome and time-consuming
Solution Approach 1:
The cutting blade assembly is segmented into detachable components: the cutting blade itself, the link with opening, and the frame with opening. These segments are connected through shaft members that can be quickly inserted and restricted, allowing the cutting blade to be replaced by simply detaching the link from the frame without disturbing the entire mounting structure.
Solution Approach 2:
The shaft member is extracted as a separate, removable component that connects the cutting blade link to the frame. By removing the shaft member, the cutting blade can be easily detached from the body. The movement restriction member is also extracted as a separate element that can be independently manipulated to secure or release the shaft member.
2Reliability
If a cutting blade is attached to the body with a bolt and a nut, then the cutting blade can be securely fixed to the body, but the replacement procedure becomes complex and cumbersome
Solution Approach 1:
The attachment system is divided into modular segments: the cutting blade, the link with opening, the frame with opening, and the shaft member. This segmentation allows the cutting blade to be replaced by manipulating only the shaft member and movement restriction member, rather than dealing with a complex bolt-and-nut assembly involving multiple components and steps.
Solution Approach 2:
The movement restriction member is designed to automatically secure the shaft member in place through its own structural features (such as a protrusion fitting into a groove or a snap-fit mechanism), eliminating the need for separate fastening operations. The component serves its own fixation function, simplifying the replacement procedure.
3Reliability
If traditional bolt-and-nut system is used to attach cutting blade, then reliable fixation is achieved, but operational efficiency decreases due to time-consuming replacement
Solution Approach 1:
The cutting blade attachment system is segmented into independently replaceable components (cutting blade, link, frame, shaft member, movement restriction member). This allows the cutting blade to be replaced by manipulating only the shaft member and movement restriction member, significantly reducing replacement time and improving operational efficiency while maintaining reliable fixation through the movement restriction member.
Solution Approach 2:
The movement restriction member is pre-configured with features (such as protrusions, grooves, or elastic elements) that automatically engage with the shaft member to secure it in place before any detachment operation begins. This preliminary securing action ensures reliable fixation is already established, and the same pre-configured features enable quick release by simply removing the movement restriction member.
Data Source
AI summary
A cutting device includes: a first cutting blade in which a first opening and a second opening are formed; a first link in which an opening is formed; a frame in which an opening is formed; at least one of a first shaft member pivotably connecting the first cutting blade to the first link by being inserted through the first opening and the opening of the first link, and a second shaft member pivotably connecting the first cutting blade to the frame by being inserted through the second opening and the opening of the frame; and at least one of a first movement restriction member configured to restrict the first shaft member from moving in a direction of detaching from the first opening, and a second movement restriction member configured to restrict the second shaft member from moving in a direction of detaching from the second opening.