Work Vehicle Transmission PTO Clutch Timing Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional transmission devices for work vehicles often result in timing disparities between the vehicle body stopping and the PTO clutch disengagement, leading to increased tillage residue and operational inefficiencies, especially on inclined fields.
Innovation Solution
A transmission device with a hydraulically operated PTO clutch linked to the braking operation tools, where the PTO clutch is disengaged after traveling stops and engaged before starting, ensuring synchronized operation with precise timing, and incorporating sensors for optimal control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PTO clutch is automatically disengaged when the brake pedal is pressed, then the stopping distance is reduced and the tractor frame is protected from being pushed, but the timing between vehicle body stopping and PTO clutch disengagement becomes uncorrelated due to inclines and traveling speed
Solution Approach 1:
The patent employs feedback mechanisms through sensors (vehicle speed sensor, PTO shaft rotation detection sensor) that continuously monitor the operational state of the vehicle and PTO shaft, and feed this information back to the control unit. The control unit processes this feedback to determine the appropriate timing for PTO clutch engagement and disengagement, ensuring synchronized operation with the vehicle body regardless of external conditions like inclines or varying speeds.
2Manufacturing precision
If the PTO clutch is disengaged before the vehicle body stops or engaged before the vehicle starts traveling, then a large amount of tillage residue remains in the cultivated field, making subsequent processing work troublesome
Solution Approach 1:
The control unit performs preliminary actions by predicting the timing for PTO clutch engagement and disengagement based on current vehicle state and operational parameters. Before the vehicle actually stops or starts moving, the control unit has already determined and prepared the appropriate clutch state transitions, ensuring that the PTO shaft is synchronized with the vehicle body motion to minimize tillage residue without requiring additional processing work.
3Loss of time
If the brake pedals are rapidly pressed or released, then the time disparity between vehicle body stopping and PTO clutch disengagement is reduced, but there is a greater possibility of timing reversal where the PTO clutch disengages after the vehicle body stops or the vehicle body starts traveling before the PTO clutch engages
Solution Approach 1:
The patent implements dynamic control by continuously adjusting the PTO clutch engagement and disengagement timing based on real-time vehicle conditions. The control unit processes dynamic inputs from sensors monitoring vehicle speed, brake pedal position, and PTO shaft rotation, and dynamically determines the optimal clutch state transitions. This dynamic approach allows the system to adapt to rapid brake operations while maintaining accurate timing sequences, preventing timing reversals even during sudden braking or release conditions.
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 solution ensures reliable disengagement and engagement of the PTO clutch, reducing tillage residue and improving operational efficiency by maintaining appropriate timing between vehicle travel and PTO clutch operation, even under sudden braking or release conditions.
Implementation Method 1
a hydraulically operated PTO clutch for interrupting the transmission of power to the external power take-off shaft
Data Source
AI summary
A transmission device for a work vehicle, comprising a travel drive system for transmitting engine power to a travel device; an implement drive system for transmitting engine power to an external power take-off shaft; braking operation tools for a braking operation; a stop operation mechanism provided to the travel drive system and capable of interrupting the transmission of power to the travel device; and a hydraulically operated PTO clutch for interrupting the transmission of power to the external power take-off shaft, the PTO shaft being provided to the implement drive system; whereinthe stop operation mechanism and the PTO clutch are linked with the braking operation tools so that the stop operation mechanism is operated to a power transmission stopping position and the PTO clutch is disengaged along with a pressing operation of the braking operation tools, and the PTO clutch is engaged along with a press-releasing operation of the braking operation tools; and an operation timing is set so that the PTO clutch is disengaged after traveling is detected to have stopped when the braking operation tools are operated in the pressing direction, and that the PTO clutch is engaged before traveling is started when the braking operation tools are operated in the press-releasing direction.