High Power Tractor Continuously Variable Transmission

Abstract

High-power tractor continuously variable transmission, including: gearbox front box, middle box, rear box, first partition, second partition, third partition, hydraulic-mechanical double-flow transmission device and fixed-axis variable-speed transmission device , forward transmission device and reverse transmission device, four-wheel drive transmission device, power output device; the front box, middle box and rear box of the gearbox are arranged in sequence, and the front box and middle box of the gearbox pass through the first partition Bolts are connected, the rear box and the middle box are connected by bolts, the second partition and the third partition are respectively installed in the middle box and the rear box by bolts, and six component installation cavities are formed in the gearbox box ; The front end of the hydraulic-mechanical double-flow transmission device extends out of the front box to connect with the tractor engine, the rear end of the fixed-axis transmission device extends out of the rear box to connect with the input end of the rear axle, and the rear end of the power output device extends out of the rear box to connect with the power output shaft The input end is connected, and the front end of the four-wheel drive transmission device extends out of the rear box to connect with the front axle of the tractor.

Description

technical field [0001] The invention belongs to the field of tractors and relates to a tractor gearbox . especially involve one A High Power Tractor Continuously Variable Transmission 。 Background technique [0002] At present, domestically produced high-power tractors generally adopt stepped shifting. The disadvantages are that there are many working gears, complex structure, discontinuous transmission ratio and low comfort. When the tractor is faced with different operating conditions, the engine cannot always be in the most ideal working condition, so that the energy saving and environmental protection of the tractor cannot be further realized. At present, foreign high-power tractors are mainly equipped with segmented power-split gearboxes. In order to realize the speed regulation, section change and direction change of the gearbox, there are mainly three structural forms: one is fixed-axis splitter device + integrated hydrostatic transmission device + hydraulic mec...

AI Technical Summary

Problems solved by technology

The first structural form, compact structure but high processing and assembly precision requirements

The second type of structure has a simple structure and a small number of parts, but requires high performance of hydraulic components

The third form requires low processing and assembly precision, but complex control

The above three schemes all use integrated hydraulic components and share the oil source with the gearbox lubrication system, which requires high cleanliness of the hydraulic system, and the reliability of the gearbox is not easy to guarantee

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