The invention belongs to the technical field of tractors, and particularly relates to a mechanical hydraulic stepless transmission system of a tractor, which comprises an engine output shaft, a planetary gear shaft, a transmission output shaft, an HMT clutch and an HST clutch, the hydraulic output end of the variable pump is communicated with the liquid inlet end of the constant displacement motor, the output end of the constant displacement motor is in transmission connection with the sun gear and an HST side gear of the HMT and HST clutch through an HMT transmission gear and an HST transmission gear, the inner gear ring is in linkage with the HMT side gear of the HMT and HST clutch, and the output end of the HMT and HST clutch is in transmission connection with the transmission output shaft through a variable speed gear mechanism. And the transmission output shaft is in transmission fit with the rear axle assembly or/and the front axle assembly. The transmission system has the HST transmission path and the HMT transmission path at the same time, switching of the HST transmission path and the HMT transmission path is achieved through the HMT and the HST clutch, the speed of the HST and the speed of the HMT are overlapped, the output speed range of the transmission system is expanded, and high transmission efficiency is achieved.
本发明属于拖拉机技术领域,特指一种拖拉机的机械液压无级传动系统,包括有发动机输出轴、行星齿轮轴、传动输出轴、HMT及HST离合器,发动机输出轴与变量泵的输入端联动、并通过输入齿轮与行星架传动,变量泵的液压输出端与定量马达的进液端连通,定量马达的输出端通过HMT传动齿、HST传动齿分别与太阳轮、HMT及HST离合器的HST侧齿轮传动连接,内齿圈与HMT及HST离合器的HMT侧齿轮联动,HMT及HST离合器的输出端与传动输出轴通过变速挡位机构传动连接,传动输出轴与后桥总成或/和前桥总成传动配合。本发明同时具备HST与HMT两条传动路径,借助HMT及HST离合器实现HST与HMT两条传动路径的切换,使HST与HMT的速度叠加而扩大了传动系统的输出速度范围、并具备较高的传动效率。
Mechanical hydraulic stepless transmission system of tractor
一种拖拉机的机械液压无级传动系统
2023-11-03
Patent
Elektronische Ressource
Chinesisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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