Cam-and-Hook Header Coupling Mechanism for Combine Harvesters
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Solution Overview
Problem
Existing combine harvesters require manual and time-consuming operations for coupling the header to the feeder, which is impractical, unsafe, and inefficient.
Innovation Solution
An agricultural machine with a cam-and-hook mechanism that automatically secures the header to the feeder and establishes hydraulic and/or electric coupling, using a rotatable cam and actuating means to maintain distance, reduce it, and interlock coupling parts for secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual coupling operations are used to secure the header to the feeder, then the coupling can be established, but the operation becomes time-consuming and inefficient
Solution Approach 1:
The coupling mechanism performs automatic self-service through the cam-and-hook system. When the header is lifted by the hydraulic system, the cam automatically rotates to engage the hook with the header, securing it without manual intervention. The coupling parts with connectors automatically interlock, establishing hydraulic and electric connections self-service style.
Solution Approach 2:
The cam is pre-positioned in a retracted state before coupling, allowing the header to be lifted first. The actuating means are pre-configured to rotate the cam into the engagement position once lifting is complete, preparing the securing action in advance of actual contact.
2Reliability
If manual securing operations are required, then the header can be attached, but the operation becomes unsafe and impractical
Solution Approach 1:
The manual mechanical securing operation is replaced by an automated cam-and-hook mechanism. The cam, actuated by hydraulic or electric means, automatically rotates to engage the hook with the header, eliminating the need for the operator to manually rotate hooks or secure connections, thereby improving safety while maintaining reliability.
Solution Approach 2:
The cam acts as an intermediary between the lifting mechanism and the hook. It translates the lifting motion into the rotational motion required to engage the hook with the header, mediating the coupling process in a controlled and safe manner without direct operator intervention.
3Adaptability or versatility
If multiple manual steps are used for coupling, then all connections can be established, but the process becomes complex and time-consuming
Solution Approach 1:
The invention merges multiple coupling functions into a single integrated mechanism. The cam rotation simultaneously performs multiple tasks: it secures the header with the hook, brings the coupling parts into alignment, and enables the interlocking of connectors for hydraulic and electric connections. This consolidation reduces the number of discrete steps while maintaining complete coupling functionality.
Solution Approach 2:
The cam-and-hook mechanism serves multiple functions: it acts as both the lifting transmission element and the securing element, while also positioning the coupling parts for automatic interlocking. This multi-functionality reduces the overall complexity of the coupling system while ensuring all necessary connections are established.
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
Facilitates quick, safe, and efficient automatic coupling of the header to the feeder, reducing manual intervention and improving operational efficiency.
Implementation Method 1
the feeder comprises at least one rotatable cam located lower than the carrying structure, and actuating means for rotating the cam about an axis, wherein the cam and actuating means are configured to: maintain the lower portion of the header at a distance from the feeder, after the header has been lifted from the ground or trailer, by extending the cam towards the header; and gradually reduce the distance between the feeder and the header, by rotating the cam away from the header
Implementation Method 2
the actuating means comprise at least one hydraulic cylinder, configured to actuate the rotation of a lever that is configured to actuate the rotation of the hook and the cam about the axis
Implementation Method 3
the feeder further comprises at least one first hook, configured for rotation by said actuating means about said axis, whilst maintaining a fixed relative position with respect to the cam, said position being such that the hook rotates towards the header while the cam moves away from the header, so that the hook thereby grips a bar or pin located on the header
Implementation Method 4
the agricultural machine is provided with a coupling mechanism for automatically establishing a hydraulic and/or electric coupling between the feeder and the header, said mechanism comprising a first coupling part mounted on the header, and a second coupling part mounted on the feeder, the coupling parts being configured so as to automatically interlock
Data Source
AI summary
The feeder of a combine has at least one rotatable cam and hook, rotatable about a common axis. The cam is arranged to gradually reduce the distance between the feeder and the header by rotating the cam away from the header and the hook is arranged to grip a bar located on the header as the cam is being rotated away from the header, thereby securing the header to the feeder. A coupling mechanism automatically establishes a hydraulic and/or electric coupling between the feeder and the header, through the reduction of the distance between feeder and header.