Full-automatic continuously variable transmission of tractor

Abstract

The invention discloses an automatic continuously variable transmission of a tractor. The continuously variable transmission is characterized in that power of an engine is shunted and distributed to a mechanical transmission section and a hydraulic transmission section by a transmission mechanism, and then converged by front and rear planetary gear rows (4) and (5), continuous infinitely variable speed is realized in each region by controlling the flow quantities, the rotate speeds and the rotate directions of a hydraulic system and an executive component. The gearbox has the characteristics by being capable of automatically adapting load and realizing stepless speed regulation so as to guarantee the engine to be in the best working condition. The novel continuously variable transmission device has the advantages of a mechanical transmission and a hydraulic transmission. Compared with the common mechanical continuously variable transmission, the novel transmission has the characteristics of great transmitting power, high efficiency and the like, and contributes to the improvement of the dynamic property, economy and working performance of the tractor.

Description

technical field [0001] The invention relates to a fully automatic stepless gearbox for tractors, in particular to a stepless gearbox in the confluence mode of double-row planetary gears in which hydraulic power and mechanical power are combined. Background technique [0002] The development of tractors towards large-scale multi-purpose and multi-functional compound operations is becoming a trend. Therefore, after the high-power tractor adopts stepless automatic transmission, it is convenient to realize the automatic shifting and reduce the labor intensity of the driver; the fully automatic stepless tractor can automatically adapt to the change of load and driving resistance, and realize the variable speed, so as to ensure that the engine power meets the needs of the tractor. The power of the tractor achieves the best match, and improves the vehicle's power, fuel economy and work efficiency, which is especially important for agricultural machinery with harsh working condition...

AI Technical Summary

Problems solved by technology

At present, there are many types of stepless transmission, but the type of stepless transmission suitable for high-power tractors is limited, such as the size and weight of electric stepless transmission are too large; the transmission power of mechanical steel belt friction stepless transmission is limited; in pure hydraulic stepless transmission, Although continuously controllable continuously variable speed can be realized, the transmission efficiency is extremely low

Images