Pivoting-Roll Serpentine Arm for Agricultural Baler Belt Tension
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Solution Overview
Problem
Existing agricultural balers face challenges in maintaining optimal belt tension and preventing belt mistracking during the bale formation process, particularly as the bale size increases, which can lead to inefficiencies and potential damage.
Innovation Solution
A serpentine arm assembly with a primary and secondary arm, featuring rotatable rolls, is designed to move between positions to maintain belt tension and reduce the risk of mistracking by adjusting the distance between rolls based on the bale size, using a spring and actuator for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serpentine arm maintains fixed distance between rolls, then the structure is simple, but belt tension is lost as bale size increases
Solution Approach 1:
The serpentine arm assembly transitions from a fixed configuration to a dynamic one where the secondary arm can pivot relative to the primary arm. This allows the distance between rolls to change as the bale grows, maintaining belt tension throughout the baling process. The movable connection between arms enables the system to adapt to varying bale sizes while preserving structural integrity.
2Reliability
If the distance between rolls is reduced as bale size increases, then belt tension is maintained, but the mechanism becomes more complex
Solution Approach 1:
The serpentine arm is divided into a primary arm and a secondary arm that are moveably connected. This segmentation allows the secondary arm to independently adjust its position relative to the primary arm, enabling precise control over the distance between rolls. The divided structure provides the necessary complexity only where needed, while keeping other portions of the system simple.
3Reliability
If fixed belt loops are used around rolls, then the structure is simple, but contact between adjacent belt loops occurs
Solution Approach 1:
The roll positioning system is made dynamic through the movable connection between the primary and secondary arms. As the bale grows and the secondary arm pivots, the rolls automatically adjust their positions to maintain optimal spacing. This dynamic adjustment prevents contact between adjacent belt loops while avoiding the need for complex fixed positioning mechanisms.
Data Source
AI summary
A take-up or serpentine arm assembly for an agricultural baler, which arm assembly is moveable between a first position corresponding to an empty bale chamber of the baler and a second position corresponding to an at least partially filled bale chamber of the baler. The arm assembly includes a primary arm having a first rotatable roll mounted thereto and a secondary arm having a second rotatable roll mounted thereto. The secondary arm is moveably connected to the primary arm, or vice versa, such that in the first position of the arm assembly, the second rotatable roll is positioned a first distance away from the first rotatable roll, and in the second position of the arm assembly, the second rotatable roll is positioned a second distance away from the first rotatable roll that is less than the first distance.