Countershaft planetary transmission backing device for tractor

Abstract

The fixed axle satellite drive regressive device for tractors mainly comprises a satellite bracket, a front center gear, a satellite wheel, a satellite axle, a back center gear and a shifter case, with the front center gear and back center gear of the circle inside the inner cavity of the satellite bracket having three satellite wheels evenly distributed respectively and the three satellite wheels being able o be assembled into an independent part and conveniently hanged to the spline back to the sub transmission output axle. And the shifter case is set on the front of the conical gear of the rear transaxle, setting three locations, namely the regressive, forward and neutral locations. The invention is compact in structure, convenient to dismantle, free from changing the structure of the gearbox, while acquiring the same number of regressive shifter with the forward shifter, ensuring the 1:1 precision driving ratio and same forward and backward shifting speed. It is simple in the gearbox structure, less precision processing stations for the case, without increasing the noises made by the drive system and the shifting convenience of the gearbox.

Description

technical field [0001] The invention relates to the field of agricultural machinery, in particular to a tractor fixed-axis planetary transmission retrograde device. It is widely suitable for various engineering operations. Background technique [0002] The main transmission part of the tractor includes a main gearbox connected with the engine; the main gearbox is connected with a retrograde device; the rear of the main gearbox is also provided with an auxiliary gearbox. At present, the retrograde device used in China mainly has the following two forms: [0003] The first form is the front gear transmission type, that is, the retrograde device is arranged at the front of the main gearbox; after the power from the engine changes the direction of rotation through the gear transmission in the retrograde device, Then power is input to the main gearbox. The above-mentioned retrograde device has the following defects: one is that the front part of the main gearbox body needs to ...

AI Technical Summary

Problems solved by technology

The above-mentioned retrograde device has the following defects: one is that the front part of the main gearbox body needs to increase a large space, and two partition walls need to be added to lengthen the main gearbox body and increase the wheelbase of the tractor. , while the number of precision machined parts of the main gearbox body increases, the structure is complex and the processing cost is high; the second is that the moment of inertia increases due to the increase in front-stage parts when the main gearbox is shifted, resulting in the The above-mentioned main gearbox is difficult to shift gears; the third is that the gear speed of the retrograde device arranged at the front of the main gearbox is high, and the noise of the transmission system increases

Due to the loss of four forward gears of this retrograde device; and the addition of a first-stage reduction device at the rear of the sub-gearbox to become eight forward gears plus eight reverse gears, a large number of modifications have been made to the original transmission structure, and the degree of generalization Low, complex structure, and the number of gears is reduced at the same time, which cannot meet the requirements of use

[0005] Therefore, the structure of the above existing two types of retrograde devices is relatively complicated, and the manufacturing cost is relatively high; and it is not conducive to fully exerting and effectively improving the efficiency of various operations.

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