Harvesting Machine Cutting Unit Remote Pivoting Maintenance
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Solution Overview
Problem
Existing harvesting machines face increased downtimes due to the complexity and time-consuming process of changing and maintaining cutting knives, particularly because the cutter frame must be manually pivoted and reconnected, which requires precise alignment and involves significant effort and time.
Innovation Solution
A harvesting machine design where the cutting unit can be pivoted about a horizontal axis and swung out laterally for maintenance, with remote-controlled locking elements and actuators allowing all manual activities to be performed from the same side, reducing the need for manual effort and improving accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutter frame is pivoted about a horizontal transverse axis and swiveled into and out of the conveying channel, then the accessibility of cutting knives for maintenance is improved, but the complexity of the pivoting device and connection elements increases
Solution Approach 1:
The cutter frame is separated from the main harvesting machine structure through a pivoting device, allowing the cutting unit to be independently positioned. This segmentation enables maintenance personnel to access the cutting knives more easily by pivoting the entire cutter frame out of the conveying channel, while the modular connection elements facilitate quick attachment and detachment without requiring complex disassembly procedures.
Solution Approach 2:
The cutter frame is designed with dynamic positioning capability through the pivoting device, which allows it to be swiveled into and out of the conveying channel as needed. This dynamic configuration enables the system to transition between operational mode (cutter frame in position) and maintenance mode (cutter frame pivoted out), providing flexibility without permanent structural modifications.
2Ease of operation
If the cutter frame is disconnected and reconnected via pivot pins and hydraulic piston-cylinder units, then the cutter frame can be pivoted for maintenance access, but the time required for reconnection increases due to precise alignment requirements
Solution Approach 1:
The connection elements are designed with self-aligning features that automatically guide the pivot pins into the correct position during the reconnection process. This self-service mechanism eliminates the need for manual alignment adjustments and reduces the time required for reconnection, as the system itself facilitates the precise positioning without requiring operator intervention for alignment.
Solution Approach 2:
The hydraulic piston-cylinder units are replaced or supplemented with simplified mechanical connection elements that rely on gravity and geometric constraints rather than hydraulic actuation for alignment. This substitution reduces the complexity of the reconnection process and eliminates the time-consuming requirement for precise hydraulic alignment, allowing for quicker attachment and detachment of the cutter frame.
3Adaptability or versatility
If manual loosening of bolt locks is required on both sides of the machine, then the cutter frame can be detached, but the effort and time required for detachment increases significantly
Solution Approach 1:
The bolt locks are extracted from the manual operation domain and replaced with remote-controlled connecting elements that can be actuated from a single location. This extraction of manual fastening operations allows the cutter frame to be detached without requiring personnel to physically access and manually loosen bolts on both sides of the machine, significantly reducing the effort and time required for detachment while maintaining the adaptability of the system.
Solution Approach 2:
Remote-controlled connecting elements serve as intermediaries between the operator and the cutter frame attachment mechanism. These intermediaries transmit the detachment command from a single control point to the connection elements on both sides of the machine, eliminating the need for direct manual intervention at multiple locations and streamlining the detachment process.
Data Source
Figure 1
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Figure 3
AI summary
The machine (1) has a circumferential driven conveying unit (7) with a conveying tooth (8) and cutting blades (11). The cutting blades are held in a blade frame (12) that is swivelable around a horizontal transverse axis (22) and in a conveying channel (5) by a swivelable unit having the blade frame. The cutting blades are laterally swivelable around a vertical axis from the machine after separation of connection elements. The separation of the connection elements for lateral swiveling of the swivelable unit is partly operable by a remote control.