Agricultural Wagon Gearbox for Dual-Side Unloading
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Solution Overview
Problem
Existing grain cart designs face stability issues due to the need for a driveshaft extending along the length of the cart, which reduces ground clearance and requires the lower auger to be raised, and they often require separate setups for left-hand and right-hand unloading options, increasing complexity and cost.
Innovation Solution
A gearbox is integrated at the junction of the unload auger and lower auger, allowing direct drive from a single input shaft, eliminating the need for a long driveshaft and enabling the lower auger to be positioned closer to the ground, while also allowing the unload auger to pivot freely for left or right discharge, using a combination of bevel and spur gears for efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a driveshaft extends along the length of the grain cart to drive the lower auger, then the lower auger can be driven from the front, but the ground clearance is reduced and the lower auger must be raised, resulting in poor stability
Solution Approach 1:
The invention extracts and removes the long driveshaft from the system by implementing a gearbox at the junction point where the unload auger and lower auger meet. This eliminates the need for a driveshaft extending the length of the cart, allowing the lower auger to be positioned closer to the ground for improved stability while maintaining the driving connection through the gearbox mechanism.
2Adaptability or versatility
If separate drive connections are used for the lower auger and unload auger, then each auger can be driven independently, but the device complexity increases
Solution Approach 1:
The invention merges the drive connections for both the lower auger and unload auger into a single gearbox located at their junction. The gearbox receives power from the tractor's power take-off shaft and simultaneously drives both augers through integrated gear mechanisms, eliminating the need for separate drive connections while maintaining independent drive capability for each auger.
3Ease of operation
If traditional right-angle gearbox with pulley and rubber belt is used, then the vertical auger can be driven, but the minimum distance between axes is determined by the radius of flighting plus drive shaft radius, increasing the overall height
Solution Approach 1:
The invention replaces the traditional pulley and rubber belt mechanical system with a direct gear-driven mechanism within the gearbox. The gearbox uses gear teeth engagement instead of friction-based belt transmission, allowing for more compact arrangement of the drive shafts and eliminating the need for large pulleys, thereby reducing the minimum distance between axes and the overall cart height.
4Adaptability or versatility
If the unload auger is positioned for left-hand or right-hand discharge, then operational preference can be accommodated, but separate auger tube builds are required for each configuration
Solution Approach 1:
The invention implements a universal gearbox design at the junction of the unload auger and lower auger that can accommodate both left-hand and right-hand discharge configurations using the same auger tube build. The gearbox's symmetric gear arrangement allows the unload auger to be positioned on either side without requiring different tube configurations, enabling a single standardized tube design to serve multiple discharge orientations.
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
This design enhances stability by lowering the overall height of the grain cart, allows for symmetric left or right unloading configurations without additional transmission systems, and increases capacity by reducing the horizontal auger height, resulting in a more stable and efficient unloading process.
Implementation Method 1
a first pair of meshing gears operatively connected between the input shaft and the main shaft so as to transfer the input drive rotation from the input shaft to the main shaft and rotate the unload auger in a first direction; and a second pair of meshing gears operatively connected between the output shaft and one of input shaft or main shaft so as to transfer the input drive rotation to the output shaft and rotate the lower auger in a second direction opposite to the first direction
Data Source
AI summary
An agricultural wagon, for example a grain cart, of the type including an upright unload auger at the front end of the grain receiving bin which can be pivoted between left side and right side discharge positions, further includes a gearbox supported at the bottom end of the unload auger. The gearbox has a main shaft directly coupled to the unload auger. An input shaft of the gearbox, coupled to the main shaft by gear reducing bevel gears, receives an input rotation from a drive source external of the gearbox, for example the PTO of a tractor, for driving the main shaft and the unload auger. A second pair of bevel gears transfer some of the input rotation of the main shaft to an output shaft of the gearbox which is connected to a lower auger along the bottom of the grain receiving bin.