Bale Wrapping Apparatus Pantographic Loading Mechanism
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Solution Overview
Problem
Existing agricultural bale wrapping apparatuses face challenges in efficiently loading cylindrical bales from the ground onto a wrapping apparatus, particularly when mounted on a tractor via a three-point hitch, as they often require driven arms or complex mechanisms.
Innovation Solution
A cylindrical bale wrapping apparatus with a main frame, two sub-frames, and a wrapping table that includes a pivotable bale support element with free-running rollers, allowing the bale to be rotated and lifted onto the wrapping table using a pantographic relationship between the sub-frames and the main frame, eliminating the need for additional driven parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If driven arms or complex mechanisms are used to load bales from ground onto wrapping table, then the loading capability is achieved, but the device complexity increases
Solution Approach 1:
The apparatus is divided into a main frame and two independently adjustable sub-frames (first sub-frame for wrapping table, second sub-frame for wrapping ring). This segmentation allows each sub-frame to be positioned independently, enabling the bale to be loaded and wrapped without complex coordinated mechanisms. The first sub-frame can be positioned at the bale loading position while the second sub-frame remains at transport position, simplifying the loading operation.
Solution Approach 2:
Both sub-frames are adjustably mounted on the main frame, allowing dynamic repositioning between different operational positions (transport position and bale wrapping position). This dynamic adjustability enables the apparatus to adapt to different operational phases without requiring complex fixed mechanisms, as the sub-frames can be moved and locked into position as needed.
2Productivity
If additional driven parts are added to enable bale loading, then the loading function is improved, but the device complexity and cost increase
Solution Approach 1:
The bale support element with free-running rollers allows the bale to be passively supported and guided during the loading process. The bale's own weight and the gravitational force naturally guide it onto the wrapping table as the sub-frames are repositioned, eliminating the need for additional driven parts to push or lift the bale. The system uses the bale's inherent properties (weight, shape) to assist in the loading process.
Solution Approach 2:
The bale support element is positioned to align with the bale's center of gravity, and the free-running rollers are arranged to contact the bale at points that naturally guide its movement. This equipotential arrangement ensures that the bale moves smoothly onto the wrapping table under its own weight without requiring additional energy input from driven mechanisms.
3Ease of manufacture
If the bale support element is fixed, then the structure is simpler, but the bale loading and positioning becomes difficult
Solution Approach 1:
The bale support element is mounted on the second sub-frame, which is adjustably mounted on the main frame. This allows the bale support element to be dynamically repositioned between transport position and bale wrapping position. The adjustability is achieved through mechanical linkages that allow the support element to move to different angular positions while maintaining structural integrity, enabling both simple construction and easy operation.
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 efficient and ergonomic loading of cylindrical bales onto the wrapping apparatus, ensuring smooth wrapping and transportation without additional driven components, enhancing operational efficiency and ease of use.
Implementation Method 1
a pivotable bale support element with free-running rollers
Data Source
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AI summary
A cylindrical bale wrapping apparatus is disclosed comprising a main frame including a vehicle mounting apparatus, a first sub-frame adjustably mounted on the main frame between a bale loading position and a bale wrapping position, and a second sub-frame adjustably mounted on the main frame between a transport position and a bale wrapping position. A wrapping table adapted to rotate a cylindrical bale about a central axis is associated with the first sub-frame. A wrapping ring including at least one roll support device adapted to rotate about the wrapping table is mounted on the second sub-frame. The second sub-frame further comprises a depending bale support element.