Reversing and high-and-low-gear gearbox control system for tractor load

Abstract

The invention relates to a transmission control system of mechanical equipment, in particular to a reversing and high-and-low-gear gearbox control system for a tractor load. The reversing and high-and-low-gear gearbox control system for the tractor load comprises a power supply unit, and further comprises an information acquiring unit, a control unit and an executing unit, wherein the informationacquiring unit is used for acquiring a stepped-down / popped-up state signal of a clutch pedal and acquiring an electric signal of reversing and high-and-low-gear selection information; the control unitis used for receiving a signal output by the information acquiring unit and judging whether an executing action is carried out or not according to the signal output by the information acquiring unit;the executing unit is used for executing the corresponding action according to a control signal transmitted from the control unit; and the executing unit uses a hydraulic control valve block, comprises a three-channel electric proportional hydraulic valve, and uses an electric hydraulic control mode. The system can be matched with different gearboxes, and has compatibility, reliability and convenience in debugging, the power of an engine does not need to be cut off in reversing and gear shifting processes, and the system is convenient to operate.

Description

technical field [0001] The invention relates to a transmission control system of mechanical equipment, in particular to a tractor load reversing and high-low gear transmission control system. Background technique [0002] At present, most of the large and medium-power wheeled tractors produced in China use mechanical gearboxes, and the forward and reverse directions are changed by setting reverse gears in the gearboxes and using mechanical shifting methods such as sliding gears, meshing sleeves or synchronizers. To switch between forward and reverse gears. When changing the forward direction, the main clutch of the tractor must be disengaged first, and then the forward or reverse gears are connected. In case of overload, the tractor must be stopped and adjusted before starting. Moving forward, the process is complicated and cumbersome, and the work efficiency is low. [0003] With the rapid development of the tractor industry, load reversing and high-low gear gearboxes have...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the large and medium-power wheeled tractors produced in China use mechanical gearboxes, and the forward and reverse directions are changed by setting reverse gears in the gearboxes and using mechanical shifting methods such as sliding gears, meshing sleeves or synchronizers. To switch between forward and reverse gears. When changing the forward direction, the main clutch of the tractor must be disengaged first, and then the forward or reverse gears are connected. In case of overload, the tractor must be stopped and adjusted before starting. Moving forward, the process is complicated and cumbersome, and the work efficiency is low

[0003] With the rapid development of the tractor industry, load reversing and high-low gear gearboxes have become the research direction of domestic tractor manufacturers. Load reversing means setting two wet multi-disc clutches in the gearbox, and realizing tractor forward by controlling different clutch engagements. Or the reverse direction is changed, and there is no need to stop in the state of overload. The actual operation process is as follows: figure 1 As shown in , but this operation method is only suitable for the operation of load reversing and shifting. Manufacturers need to develop a new generation of gearbox products, which will increase costs. Therefore, there is an urgent need for a compatible load reversing and high-low gear gearbox , reliability, and easy debugging control system, suitable for different gearboxes, easy to operate in actual use

Images