Hydraulic mechanical type dual-clutch automatic transmission of tractor and control method

Abstract

The invention discloses a hydraulic mechanical type dual-clutch automatic transmission of a tractor. The transmission comprises a power main input shaft, a hydraulic torque converter, a load power output shaft and a dual-clutch automatic transmission; the power main input shaft is connected into the hydraulic torque converter, a hydraulic operation system is arranged on the hydraulic torque converter, the dual-clutch automatic transmission comprises a shell, a solid input shaft, a hollow input shaft, a first clutch, a second clutch, a main speed reducer, a first output shaft and a second output shaft, an automatic gear shifting control system is arranged on the dual-clutch automatic transmission, the main speed reducer comprises an odd number gear shifting and selecting gear set, a differential mechanism, an even number gear selecting and shifting gear set and a gear reversing, selecting and shifting gear set, the odd number gear shifting and selecting gear set and the differential mechanism are arranged on the solid input shaft, the even number gear selecting and shifting gear set and the gear reversing, selecting and shifting gear set are arranged on the hollow input shaft, and the differential mechanism comprises a differential mechanism shell, a differential mechanism gear, a main speed reducer driving conical gear, a main speed reducer driven conical gear, and an axle shaft. An automatic gear shifting control method achieved by the hydraulic mechanical type dual-clutch automatic transmission of the tractor can solve the problem of power transmission interruption and ensures the stable starting of the tractor.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, more specifically, to a tractor hydromechanical dual-clutch automatic transmission and a control method. Background technique [0002] At present, the technology of automatic transmission is developing very rapidly, especially the dual-clutch automatic transmission has a very good development momentum. Its technology is relatively mature and can better solve the problem of power transmission interruption for shifting. In recent years, its application has become more and more more widely. [0003] Although the dual-clutch automatic transmission in the prior art can better solve the problem of power transmission interruption, when it is used on a tractor driven by a diesel engine, due to the complex operating conditions of the tractor, many gear requirements, and a large traction load etc., especially for the load power output shaft of a tractor, it is required that the rotation speed...

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Problems solved by technology

[0003] Although the dual-clutch automatic transmission in the prior art can better solve the problem of power transmission interruption, when it is used on a tractor driven by a diesel engine, due to the complex operating conditions of the tractor, many gear requirements, and a large traction load etc., especially for the load power output shaft of a tractor, it is required that the rotation speed of the load power output shaft can only depend on the rotation speed of the engine crankshaft and has nothing to do with the driving speed of the tractor. The existing dual-clutch automatic transmission cannot meet the above conditions. Therefore, there is a need for a tractor hydromechanical dual-clutch automatic transmission and its control method. The hydraulic torque converter has the functions of ensuring the smooth start of the tractor, attenuating the torsional vibration in the transmission system, and preventing the transmission system from being overloaded. The dual-clutch The selection and shifting speed of the gearbox is very fast, which can better solve the problem of interruption of power transmission

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