Work Vehicle Transmission Switching for Equal Track and Wheel Speed
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Solution Overview
Problem
Existing work vehicles are limited to lower travel speeds when using tracks compared to wheels, restricting their maximum speed when tracks are attached.
Innovation Solution
A work vehicle equipped with a transmission device that switches between decelerating and accelerating power transmission modes, allowing equal or similar maximum travel speeds with both wheels and tracks by adjusting the drive rate of the axles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tracks are attached to the work vehicle, then the work vehicle can travel on various terrains, but the maximum travel speed is reduced compared to using wheels
Solution Approach 1:
The transmission device is configured to dynamically adjust the drive rate of the axle based on the attached travel device type. When tracks are detected, the system automatically switches to a higher drive rate mode, and when wheels are detected, it switches to a lower drive rate mode, optimizing speed for each configuration
Solution Approach 2:
The system changes the operational parameters of the transmission device by adjusting the drive rate of the axle. The drive rate is increased when tracks are attached and decreased when wheels are attached, allowing the maximum travel speed to be equalized across different travel device configurations
2Adaptability or versatility
If the drive wheel outer diameter is made smaller to match track specifications, then track compatibility is improved, but the maximum travel speed with tracks is reduced
Solution Approach 1:
The system dynamically adjusts the drive rate parameter based on the attached travel device. When tracks with smaller drive wheels are attached, the drive rate is automatically increased to compensate for the reduced wheel diameter, maintaining equal maximum travel speed across different configurations
Solution Approach 2:
The transmission device changes the drive rate parameter in response to different travel device attachments. The control system detects the attached device type and adjusts the drive rate accordingly, transforming the smaller drive wheel configuration into an equivalent speed performance
Data Source
AI summary
A work vehicle includes a prime mover; a transmission device; and an axle. The transmission device includes first and second transmission sections. The first transmission section is switchable into a decelerating power transmission mode and an accelerating power transmission mode. The axle is driven at a first drive rate with the first transmission section in the accelerating power transmission mode and the second transmission section in a transmission mode for a maximum speed and at a second drive rate with the first transmission section in the decelerating power transmission mode and the second transmission section in the transmission mode for a maximum speed. The first drive rate is higher than the second drive rate.