Lower Link Hook Latch for Remote Tractor Attachment Coupling
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Solution Overview
Problem
Current systems lack a method for remotely and automatically coupling workable attachments to a tractor's three-point linkage, leading to increased research and inventory costs and complex operation processes.
Innovation Solution
A coupling device featuring a hook with a locking latch and actuation lever that allows automatic engagement and disengagement of attachments without manual activation, equipped with a safety locking mechanism to prevent unintended disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a three-point linkage assembly is designed to accommodate a variety of workable attachments, then adaptability is improved, but research and inventory expenditure increases
Solution Approach 1:
The patent implements a universal three-point linkage assembly with a standardized hook design that can accommodate multiple types of workable attachments through a single mating interface. The hook includes a body with an opening, locking latch, and actuation lever that work together to provide secure attachment for various implements, eliminating the need for multiple specialized coupling devices and reducing inventory requirements
2Ease of operation
If remote coupling of the three-point linkage assembly with workable attachment is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The coupling device is designed to automatically engage and lock the workable attachment to the three-point linkage without requiring manual activation or complex control systems. The locking latch automatically secures the attachment when the hitching pin engages the hook, and the actuation lever provides simple manual disengagement, allowing the system to service itself through passive mechanical engagement
Solution Approach 2:
The patent introduces a cable or rod as an intermediary mechanism that transmits force from the actuation lever to the locking latch, enabling remote operation from the operator station. This simple mechanical intermediary allows the operator to disengage the attachment from a distance without adding complex hydraulic or electronic control systems
3Productivity
If automatic coupling without activation is implemented, then productivity is improved, but reliability may worsen due to unintended disengagement
Solution Approach 1:
The locking latch is designed with a geometry that limits its motion and creates a motion curve, preventing unintended disengagement while allowing automatic coupling. The latch protrudes into the opening of the hook body and locks the mating part in place, creating a secure connection that requires deliberate action to release
Solution Approach 2:
The coupling device incorporates a safety device that can be inserted through a hole in the hook body to permanently lock the coupling mechanism. This preliminary safety action prevents any activation of the actuation lever, ensuring the attachment cannot disengage unintentionally while maintaining the ability to release when needed
Data Source
AI summary
A coupling device is disclosed which is designed as a hook with a hook body, an opening that allows the mating part of the attachment to enter the hook body, a guideway and a shoulder to counter any offset between the mating part of the attachment to the hook. Furthermore, the coupling device includes a locking latch that protrudes into the opening of the hook body and locks the mating part of the attachment in order to engage the mating part with the hook body, thereby retaining the mating part in a locked position. In an embodiment, the locking latch has a geometry that limits the motion of the locking latch and generates a motion curve. Furthermore, the locking latch moves on a motion curve to allow the locking latch to release the opening in order to allow the mating pan to enter the socket.