Agricultural Header Arm Locking Mechanism for Rapid Rigid-Flex Changeover
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Solution Overview
Problem
The process of transitioning between flexible and rigid cutter bar configurations in agricultural headers is inefficient due to the difficulty in manually aligning and inserting pins to block or enable arm rotation, leading to delays in the harvesting process.
Innovation Solution
A locking mechanism with a movable pin and biasing assembly that automatically transitions between locked and unlocked states in response to arm orientation, allowing for rapid switching between flexible and rigid cutter bar configurations without manual alignment of pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pin is inserted through openings in the arm and header frame to block arm rotation, then the cutter bar assembly can be converted to a rigid configuration, but the process of aligning and inserting the pin is difficult and time consuming
Solution Approach 1:
The pin is pre-positioned in a recess of the arm at a location that automatically aligns with the opening in the header frame when the arm is in the desired locked position. This preliminary positioning eliminates the need for manual alignment and insertion operations, allowing rapid transition to the rigid configuration by simply engaging the pin with the opening.
Solution Approach 2:
The arm's recess is designed to automatically guide and receive the pin without requiring manual intervention for alignment. When the arm is positioned correctly, the recess self-aligns with the header frame opening, and the pin can be inserted or engaged automatically, making the system self-servicing for the locking operation.
2Stability of the object's composition
If manual movement of the arm is used to align openings for pin insertion, then the arm can be locked in position, but the weight of the arm and supported load makes manual positioning difficult
Solution Approach 1:
The recess in the arm is pre-positioned at a location that corresponds to the desired locked position. This allows the arm to be moved into position (by any means), and the recess will automatically align with the header frame opening, eliminating the need for precise manual alignment during the locking operation.
Solution Approach 2:
The recess acts as an intermediary feature between the arm and the pin. Instead of requiring direct manual alignment of the arm with the opening, the recess serves as a guide that automatically establishes proper alignment when the arm is in the correct position, reducing the operational difficulty.
3Adaptability or versatility
If the cutter bar assembly is made flexible with pivoting arms, then it can follow field contours, but the ability to convert to a rigid configuration is compromised by complex locking procedures
Solution Approach 1:
The recess is pre-formed in the arm at the exact location where the pin needs to engage for locking. This preliminary configuration simplifies the locking mechanism, as it only requires inserting the pin into the pre-aligned recess and opening, rather than requiring complex alignment procedures or adjustable components.
Solution Approach 2:
The locking function is segmented into two independent parts: the recess in the arm and the opening in the header frame. This segmentation allows each part to be simple and fixed, eliminating the need for complex adjustable mechanisms while still enabling the rigid configuration when needed.
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
Enhances the efficiency of the harvesting process by allowing quick transitions between cutter bar configurations, reducing the time and effort required for changing between flexible and rigid settings.
Implementation Method 1
a biasing assembly configured to selectively urge the pin toward the first pin position and toward the second pin position
Data Source
AI summary
A locking mechanism includes a pin configured to movably couple to a first element of an agricultural header, wherein the first element includes one of an arm and a frame. The locking mechanism also includes a mount configured to couple to a second element of the agricultural header, wherein the second element includes the other of the arm and the frame. The pin is disposed within an opening of the mount, the opening has a first portion configured to receive the pin while the pin is in a first position and to block relative movement between the pin and the mount to block rotation of the arm, and the opening has a second portion configured to receive the pin while the pin is in a second position and to enable relative movement between the pin and the mount to enable rotation of the arm.