Tracked Unit Step-Up Gear System for Ground Work Vehicle Speed Compensation
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Solution Overview
Problem
Ground work vehicles, such as combine harvesters, experience a significant reduction in translation speed when switching from ordinary wheels to tracked units due to the reduced diameter of the drive wheel, which affects operational efficiency.
Innovation Solution
A tracked unit design that includes a step-up gear system and a modular flange system allowing for seamless transition between wheel and tracked configurations without altering the final reduction unit or vehicle height, ensuring consistent speed and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If tracked units with reduced diameter drive wheels are used, then ground contact area and traction are improved, but translation speed is significantly reduced
Solution Approach 1:
A step-up gear system acts as an intermediary mechanism between the drive wheel and the track. This gear system compensates for the speed reduction caused by the smaller drive wheel diameter, maintaining translation speed comparable to that of ordinary wheels while preserving the ground contact area benefits of tracked units.
Solution Approach 2:
The invention changes the gear ratio parameter in the final reduction unit by incorporating a step-up gear system. This parameter change allows the tracked unit to overcome the inherent speed limitation imposed by the reduced drive wheel diameter, effectively decoupling the relationship between wheel size and translation speed.
2Adaptability or versatility
If tracked units are fitted onto the axle, then terrain adaptability is improved, but vehicle height from ground changes
Solution Approach 1:
The flange design serves multiple functions: it supports both tracked units and ordinary wheels, maintains consistent vehicle height for both configurations, and provides a universal mounting interface. This allows the vehicle to switch between configurations without altering its overall height or requiring different mounting structures.
3Volume of moving object
If the drive wheel diameter is reduced in tracked units, then structure compactness is improved, but translation speed is reduced
Solution Approach 1:
The step-up gear system serves as a mediating mechanism that decouples the relationship between drive wheel size and translation speed. It allows the compact structure with reduced drive wheel diameter to be maintained while compensating for the speed loss through gear ratio modification.
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 maintains substantial equality in translation speed and vehicle height across configurations, enhancing operational efficiency and safety by compensating for the speed reduction caused by the smaller drive wheel diameter of the tracked units.
Implementation Method 1
a step-up gear system and a modular flange system allowing for seamless transition between wheel and tracked configurations
Data Source
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AI summary
A tracked unit for a ground work vehicle, comprising a structure (2a) for supporting a drive wheel which transmits motion to a track for resting on the ground, the tracked unit being designed to be fitted to a final reduction unit (11), which is located at one end of at least one axle (1) of the work vehicle, which is provided with a motor drive (4) adapted to give the vehicle correct translation speed values in the configuration in which wheels are fitted at the ends of the axle; moreover, a plate (8) is provided which is adapted to be associated detachably with a flange (7) that is provided monolithically at the end of the axle (1), the plate (8) being adapted to support, at one face, the final reduction unit (11) directly associated with the drive wheel (2b) of the tracked unit and, at the other face, a step-up gear system (13), in which the input shaft (13a) is connected to the drive shaft of the motor drive system (4) with which the work vehicle is provided, while the output shaft (13b) is connected to the input shaft (11a) of the final reduction unit (11).