Tractor Front Axle Vertical Positioning for In-Place Turning
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Solution Overview
Problem
Conventional tractors have a wide minimum turning radius due to direct coupling of front wheel axles with front wheels, limiting their ability to turn in small spaces and reducing work efficiency, especially when trying to turn around in place.
Innovation Solution
The tractor is designed with front wheel axles positioned above the front wheels, allowing for maximum steering angles up to a right angle, and features a central differential device to control RPM differences between front and rear wheels, along with a four-bar link structure for enhanced steering and shock absorption, enabling tighter turns without axle interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If front wheel axles are directly coupled to front wheels, then the structure is simple, but the minimum turning radius becomes wide and the tractor cannot turn in place
Solution Approach 1:
The front wheel axles are repositioned from a horizontal alignment with the front wheels to a vertical arrangement where they extend above the front wheels. This dimensional change in axle positioning allows the front wheels to steer to extreme angles (including 90 degrees) without mechanical interference from the axles, enabling the tractor to turn in place while maintaining structural simplicity
2Ease of operation
If front wheel axles are positioned above front wheels, then the turning radius is reduced and in-place turning is enabled, but the power transmission path becomes more complex
Solution Approach 1:
The power transmission system incorporates a central differential device that dynamically distributes power between the front and rear wheels based on their rotational speed differences. This dynamic power distribution mechanism accommodates the elevated axle configuration and enables the front wheels to achieve extreme steering angles including 90-degree turns, allowing the tractor to turn in place while managing the complexity of the power transmission path
3Ease of operation
If the tractor must move forward and backward repeatedly to turn around, then the turning capability is maintained, but work efficiency is reduced
Solution Approach 1:
By repositioning the front wheel axles vertically above the front wheels, the system enables the front wheels to steer to extreme angles including 90 degrees relative to the tractor's longitudinal axis. This dimensional change in axle positioning allows the tractor to rotate in place in a single motion, eliminating the need for repeated forward and backward movements and significantly improving work efficiency in confined spaces
Data Source
AI summary
The present invention provides a tractor which is configured such that front wheel axles are disposed above upper portions of front wheels so that the front wheels are prevented from being impeded by the front wheel axles even when the front wheels are steered to maximum angles in a clockwise or counterclockwise direction and turned to an angle over or approximate to a right angle with respect to the longitudinal direction of the tractor, whereby the tractor can be turned in place by manipulating a steering wheel.