Hinged Traction Bar and Swivel Gearboxes for Grain Harvester Lateral Operation
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Solution Overview
Problem
Current grain collecting and processing machines face issues with overloaded cardans and excessive vibrations when working in a displaced position, limited operation due to one-sided head displacement, inefficient straw chopping and spreading, and operator discomfort from heavy vibrating cases.
Innovation Solution
A mechanical arrangement featuring a hinged traction bar with swivel gearboxes for lateral operation, an intermediate gearbox for beater drum rotation control, a horizontal straw chopper with fins for even spreading, and separate vibrators for reduced vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head is displaced from the machine to work laterally, then the operation flexibility is improved, but the cardans become overloaded causing premature wearing and excessive vibrations
Solution Approach 1:
The patent applies dynamics by making the head displacement adjustable and controllable through a mechanical system with variable geometry. The head can be positioned at different lateral distances from the machine body according to operational needs, rather than being fixed in a displaced position. This dynamic adjustment allows the system to maintain cardan reliability while achieving operational flexibility when required.
Solution Approach 2:
The invention changes the geometric parameters of the machine configuration by introducing a variable displacement mechanism. The head's lateral position is controlled by a mechanical system that adjusts the distance between the head and machine body, thereby changing the operational parameters without permanently overloading the cardans. This parameter control resolves the contradiction between flexibility and reliability.
2Productivity
If the chopper is arranged vertically to chop straw, then the chopping function is provided, but the working life of the lower roller is reduced and material spreads irregularly
Solution Approach 1:
The patent inverts the conventional vertical arrangement of the chopper by positioning it horizontally. This inversion changes the chopping mechanism orientation so that the chopper shaft and knives are arranged horizontally rather than vertically. The horizontal arrangement eliminates the harmful vertical impact on the lower roller while maintaining effective straw chopping capability, thereby extending roller working life without sacrificing productivity.
3Device complexity
If a single-part vibrating case is used in larger equipment, then the structure is simplified, but the machine generates excessive vibrations causing wear and operator discomfort
Solution Approach 1:
The patent applies segmentation by dividing the single-part vibrating case into multiple separate sections or modules. This segmentation allows the vibration-generating components to be isolated and balanced independently, reducing the transmission of excessive vibrations to the machine body and operator. The segmented structure maintains structural simplicity while effectively mitigating harmful vibrations through modular design and independent balancing of each segment.
Data Source
AI summary
A mechanical arrangement introduced into a grain collecting and processing machine using a hinged traction bar is provided, wherein two swivel gearboxes are installed, allowing the head to be assembled in the center and the machine to work laterally displaced over the tractor vehicle, on both sides, thus facilitating both the operation and the collection process. A grain collecting and processing machine including the mechanical arrangement is also provided.