Two speed adjustable speed transmission device for tangential and longitudinal flow threshing separating transmission system

Abstract

The invention provides a two speed adjustable speed transmission device for a tangential and longitudinal flow threshing separating transmission system. A shifting fork mechanism is located on the topof a two speed gear transmission box body, an input cross shaft is right above an output cross shaft, and power is transfer between the two shafts through two pairs of shifting straight gears; the axes of an output longitudinal shaft and an output cross shaft are vertical, and power is reversed and transferred between the two shafts through a pair of reversing bevel gear; the power is transferredfrom the input cross shaft to the two speed gear transmission box body; the shifting fork mechanism adjusts the two pairs of shifting straight gears to achieve power transfer and two speed transmission; the power transferred to the output cross shaft is then transferred to the output longitudinal shaft through the pair of reversing bevel gears, and the other part of power on the output cross shaft is transferred to a belt wheel II and the power is finally transferred to a tangential flow roller and a longitudinal axial flow roller separately. According to the device, the twos speed transmission function of a threshing roller is achieved, the harvesting performance is improved, and meanwhile, the power transfer path between the tangential flow roller and the longitudinal axial flow rolleris also shortened, and the transfer efficiency is improved.

Description

technical field [0001] The invention belongs to the technical research field of combine harvesters, and in particular relates to a two-speed transmission device of a cutting and longitudinal flow threshing separation transmission system. Background technique [0002] Since the combine harvester has multiple working parts to complete different types of work at the same time when harvesting crops, and the requirements for the working power of each working part are different, the transmission device has become an important part of the combine harvester. The stability and reliability of the transmission directly affect the working performance and service life of the combine harvester. At present, there are two main transmission modes for the cutting and longitudinal flow type double-drum threshing of the existing full-feed rice combine harvester. One is single-side chain transmission, and the transmission structure is arranged on the same side, and the other is using two-sided p...

AI Technical Summary

Problems solved by technology

This transmission method requires multi-stage chain transmission, which has relatively large noise and vibration, and poor running stability.

[0004] In the tangential longitudinal flow threshing and separation device disclosed in Chinese patent application CN106717593A, the power transmitted by the engine through the transmission system is input from the power input end, and the drive shaft is driven to rotate through the sprocket, and the power is transmitted to the gear transmission box. While the box transmits the power to the shaft of the vertical axis flow drum, the power is transmitted to the sprocket through the drive shaft, and the sprocket chain transmits the power to the sprocket on the right end of the cutting flow drum to drive the cutting flow drum to rotate. The chain transmission has a large Noise and vibration, poor adaptability to crops, lack of overload protection, and the installation position of the transmission box and the assembly between the transmission box and the vertical axial flow drum shaft are difficult to install

This transmission mode has multi-stage chain transmission, lacks overload protection, and the shaft of the cut-off drum is the longitudinal output shaft of the transmission box, which brings inconvenience to the installation of the harvester, and the transmission has only one gear, which limits the speed of the threshing drum.

[0008] In addition, the threshing and separation device of the rice combine harvester on the market is not suitable for crops, and the threshing drum speed cannot be adjusted according to the moisture content of the crop, grass-to-grain ratio, and crop yield per unit area. In my country's rice-oil (wheat) rotation area, this not only increases the adjustment time during operation, but also reduces the operating efficiency of the harvester

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