Agricultural Roller Pair Spur Gear Layout for Adjustable Gaps
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Solution Overview
Problem
Existing agricultural roller drive devices with spur gear transmissions are bulky, subject rollers to high torsional stress, and require complex mechanisms to adjust the gap between rollers, leading to inefficiencies in power transmission and processing force.
Innovation Solution
A drive device with two spur gear drives, each with a different number of spur gears, is used to drive a roller pair from a common shaft, allowing for compact design and synchronized counter-rotation without transmitting torque between rollers, and includes separate gearbox housings and lubricant reservoirs to simplify sealing and accommodate angular errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spur gear drive is used to transmit drive motion between rollers, then the structure is simpler, but the rollers cannot rotate in opposite directions with synchronized speeds
Solution Approach 1:
The drive system is segmented into two independent spur gear drives, each with an odd number of gears, both driven from a common drive shaft. This segmentation allows each roller to be driven independently while maintaining synchronized counter-rotation, resolving the contradiction between structural simplicity and synchronization precision.
2Adaptability or versatility
If spur gears are arranged to allow roller adjustment movements, then the adaptability is improved, but the device becomes bulky and complex
Solution Approach 1:
The spur gear drives are designed to be movable relative to the rollers, allowing them to accommodate adjustment movements of the rollers. This dynamic arrangement enables the drive mechanism to adapt to roller position changes without requiring complex additional mechanisms, maintaining simplicity while improving adaptability.
3Ease of operation
If the drive shaft is positioned to accommodate roller movements, then the ease of operation is improved, but the power transmission efficiency decreases
Solution Approach 1:
The spur gear drives act as intermediary elements between the common drive shaft and the rollers. They transmit drive motion while accommodating roller adjustments, minimizing power transmission losses despite the offset position of the drive shaft. The gear meshing ensures efficient torque transfer even during roller movement.
4Volume of moving object
If a common drive shaft is used for both spur gear drives, then the device compactness is improved, but the sealing complexity increases
Solution Approach 1:
The common drive shaft system is segmented into two separate, sealed gear drive units. Each unit with an odd number of spur gears is independently sealed, allowing the compact common drive shaft arrangement while simplifying the sealing requirement compared to a fully integrated system. This segmentation maintains compactness while managing sealing complexity.
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
The solution enables efficient, compact, and synchronized roller operation with minimal power loss and backlash, allowing adjustable gaps between rollers to adapt to crop flow, while avoiding excessive stress and maintaining processing efficiency.
Implementation Method 1
drive the rollers of the cooperating roller pair from a separate drive shaft via two spur gear drives, each transmitting the drive motion from the drive shaft to the respective roller
Data Source
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AI summary
The present invention relates generally to agricultural machinery with a cooperating pair of rollers, the rollers of which can be driven in opposite directions by a drive device. The invention relates in particular to the drive device for driving such a pair of rollers with a spur gear transmission. According to the invention, the drive device has a first spur gear transmission with an odd number of spur gears for driving a first roller of the pair of rollers and a second spur gear transmission with an even number of spur gears for driving a second roller of the pair of rollers, wherein a common drive shaft, on which both spur gear transmissions, each with an input spur gear, are mounted, is provided and is arranged offset from the rollers.