Work Machine Attachment Quick Coupling with Visual Pin Notch Alignment
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Solution Overview
Problem
Existing work machine attachments face difficulties in quick and easy coupling due to the challenge of visually recognizing the fitting state between the fixing pin and notch, which hinders rapid engagement and connection.
Innovation Solution
The attachment design includes a first and second attachment body with specific projecting portions and notches, allowing the fitting pin to be easily aligned and connected, with the pin holding unit securing the fitting pin's position for stable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the notches are positioned on the inner sides of the side walls for fitting with the fixing pin, then the structural connection is achieved, but the fitting state cannot be visually recognized from the side, hindering rapid engagement
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the notches on the outer sides of the side walls rather than the inner sides. This inversion allows the fitting state to be visually recognized from the side, enabling operators to quickly confirm proper engagement without time loss.
Solution Approach 2:
The patent employs visual differentiation through the positioning of notches and projecting portions on outer sides, creating a visible contrast that indicates the fitting state. This visual cue system allows operators to rapidly identify when components are properly connected.
2Productivity
If the notches are positioned on the inner sides of the side walls, then the connection structure is simplified, but the engagement speed is reduced due to inability to visually confirm fitting state
Solution Approach 1:
The patent swaps the conventional inner-side notch positioning with outer-side positioning. This inversion, while slightly increasing structural complexity, dramatically improves engagement speed by enabling visual confirmation of the fitting state, resulting in net productivity gain.
3Reliability
If the first and second attachment bodies are connected with the fitting pin and notches, then detachable connection is achieved, but the center of gravity position affects lifting safety
Solution Approach 1:
The patent designs the connection structure to maintain the center of gravity in a safe position during lifting operations. By strategically positioning the fitting pin and notches, the structure achieves equipotentiality in terms of gravitational stability, ensuring safe lifting while maintaining ease of coupling through the visual fitting indicator.
Data Source
AI summary
An attachment of a work machine includes first and second attachment bodies connectable to each other quickly and easily. The first attachment body includes first side plates including first projecting portions formed with notches, and the second attachment body includes second side plates including second projecting portions and a fitting pin inserted through the second projecting portions. The interval between the first side plates is larger than the interval between the second side plates. The first and second attachment bodies are interconnected while the first projecting portions are disposed outside the second projecting portions, and the parts of the fitting pin protruding outward beyond the second projecting portions are fitted with the notches.