Clevis Pin Coupling Mechanism for Tool-Free Tractor Implement Attachment
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Solution Overview
Problem
Existing clevis devices for coupling implements to tractors are inefficient as they often require threaded fasteners and wrenches, complicating the coupling process.
Innovation Solution
A clevis device is positioned on a tractor's drawbar, engaging a tow bar on an implement, with a pin extending through the clevis and drawbar to secure the implement without the need for threaded fasteners or wrenches, using a pin with a head to prevent it from falling through the aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded fasteners and wrenches are used to secure the clevis to the drawbar, then the connection strength is improved, but the ease of operation deteriorates due to the complexity of the coupling process
Solution Approach 1:
The patent removes threaded fasteners and wrenches from the coupling system, extracting the problematic elements that caused operational complexity. The clevis is secured to the drawbar using a simple pin insertion mechanism instead of threaded fasteners, eliminating the need for tools and complex assembly steps while maintaining connection strength through the pin-and-aperture design.
Solution Approach 2:
The coupling system is designed to be self-servicing through the pin insertion mechanism. The pin with head configuration allows the implement to be self-coupled to the tractor without requiring external tools or complex fastening operations. The head on the pin prevents it from falling through the aperture, providing self-retention without additional fasteners.
2Reliability
If threaded fasteners are used to secure the implement, then the reliability of the connection is improved, but the loss of time increases due to the complexity of the coupling process
Solution Approach 1:
The patent extracts threaded fasteners and complex fastening mechanisms from the coupling system, replacing them with a simple pin insertion design. This reduction in mechanical complexity directly decreases the time required for coupling while maintaining reliable connection through the pin-and-aperture engagement system.
Solution Approach 2:
The pin is designed with a head configuration that preliminarily prevents it from falling through the aperture during assembly. This preliminary design feature ensures reliable connection without requiring additional fastening steps or tools, thereby reducing coupling time while maintaining connection reliability.
Data Source
AI summary
A clevis and drawbar system for coupling an implement to a tractor includes a tractor that has a drawbar. A clevis is selectively positioned on the drawbar. The clevis engages a tow bar on an implement thereby facilitating the tractor to tow the implement. A pin is selectively extended through the clevis and the drawbar. The pin engages the implement thereby facilitating the implement to be coupled to the tractor.