Tractor gearbox

Abstract

The invention discloses a tractor gearbox which comprises a box body, a main operating device, a main speed change mechanism and a subsidiary speed change mechanism. The main speed change mechanism comprises a first shaft as a power input shaft, an intermediate shaft parallel to the first shaft, a second shaft coaxial with the first shaft and a reverse gear shaft. The subsidiary speed change mechanism comprises a planetary gear device capable of adjusting a high gear, a low gear and a creeper gear of the rotating speed output by the main speed change mechanism. The planetary gear device comprises a planetary gear spline ring, a creeper gear ring and a joint gear sleeve used for being connected with an output shaft. The joint gear sleeve moves to be in meshing transmission with a gear shaft of the second shaft, the planetary gear spline ring and the creeper gear ring to achieve conversion between the high-gear rotating speed, the low-gear rotating speed and the creeper-gear rotating speed. According to the tractor gearbox, on the premise that the transmission part of an existing gearbox body is kept unchanged, speed change gears of the gearbox can be increased, the successiveness is good, the using demands of users are better met, and the tractor gearbox is compact in structure, convenient to operate and high in practicability.

Description

technical field [0001] The invention relates to the technical field of tractors, in particular to a tractor gearbox. Background technique [0002] Currently commonly used tractor gearboxes are mainly composed of ten-speed or twelve-speed combined structures. With the rapid development of agricultural mechanization and the increasing types of agricultural machinery and implements, the requirement for the adjustment range of the tractor's speed is increasing, and it is best to provide more gears for users to choose from. As far as the existing gearbox is concerned, generally there are only high-end and low-gear adjustments for the output speed of the main transmission mechanism, but for some equipment that requires lower-speed travel operations, the output speed is still too fast after the existing low-gear adjustment. If simply relying on adding gear pairs to increase the speed adjustment gear, it will inevitably cause the volume of the gearbox case to become larger, the str...

AI Technical Summary

Problems solved by technology

As far as the existing gearbox is concerned, generally there are only high-end and low-gear adjustments for the output speed of the main transmission mechanism, but for some equipment that requires lower-speed travel operations, the output speed is still too fast after the existing low-gear adjustment. If simply relying on adding gear pairs to increase the speed adjustment gear, it will inevitably cause the volume of the gearbox box to become larger, the structure will be complicated, and the main transmission of the existing gearbox will be greatly changed.

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