Harvester Separator Rotor With Recessed Holding Elements
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Solution Overview
Problem
Existing separator rotors in harvesters face issues with damage due to overloading and wear, particularly with screws being exposed to the material flow, leading to increased weight and difficulty in replacing driver elements.
Innovation Solution
The design incorporates recesses in the rotor body for holding elements, which are inserted and welded, keeping fastening screws out of the material flow, with driver elements featuring a predetermined breaking point for easy replacement and a gabled roof central part to minimize weight and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If holding elements are welded onto the peripheral surface of the basic rotor body, then the rotor can retain its closed hollow-cylindrical shape, but the weight of the rotor is increased
Solution Approach 1:
The rotor design segments the holding elements from the basic rotor body by creating recesses in the rotor body into which holding elements are inserted. This segmentation allows the holding elements to be integrated into the rotor structure without adding significant weight, as they fill voids rather than adding external mass.
Solution Approach 2:
The holding elements are nested within recesses of the basic rotor body, with the bent edge of the holding element fitting into the recess and being welded to the rotor body. This nesting approach allows the holding elements to be positioned correctly while minimizing additional weight, as the holding elements occupy space that would otherwise be empty.
2Ease of operation
If fastening screws are placed on the lateral surface of the basic rotor body, then driver elements can be easily attached, but the screw heads wear out due to exposure to crop flow
Solution Approach 1:
The fastening screws are extracted from the crop flow environment by positioning them inside the holding elements, which are themselves positioned within recesses of the rotor body. This extraction removes the screws from the harmful material flow, preventing wear while maintaining the ability to attach driver elements through the holding elements.
Solution Approach 2:
The holding elements serve as an intermediary between the fastening screws and the driver elements. The screws fasten to the holding elements, which are welded to the rotor body, and the driver elements attach to the holding elements. This intermediary structure protects the screws from direct exposure to crop flow while enabling driver element attachment.
3Ease of repair
If driver elements are screwed onto holding elements, then driver elements can be replaced in the event of damage, but damage to the holding elements cannot be ruled out
Solution Approach 1:
The design segments the driver elements, holding elements, and basic rotor body into distinct replaceable components. Driver elements can be replaced by unscrewing from the holding elements, and if holding elements are damaged, they can be replaced by removing them from the recesses and welding new ones. This segmentation enables easy replacement at multiple levels without requiring replacement of the entire rotor assembly.
Solution Approach 2:
The design anticipates potential damage to holding elements by making them replaceable through the recess structure. The recesses are designed to accommodate holding elements that can be removed and replaced, providing a cushion against the need for complex repair procedures if holding elements are damaged.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a separator rotor (1) for a harvesting machine with radially projecting drive elements (2) and a hollow cylindrical base body to which retaining elements (6) are permanently attached, and to which the drive elements (2) are detachably attached. To improve both the service life and ease of maintenance of the separator rotor (1) while maintaining a lightweight design, the rotor base body (4) is provided with recesses into which the retaining elements (6) are inserted. These recesses primarily absorb forces exerted on the drive elements (2) and ensure that the fastening screws securing the drive elements are located outside the crop flow and are therefore subject to minimal wear.