combine harvester

Abstract

The present invention provides a combine harvester that adjusts threshing to an optimal state so that the loss amount calculated by using the threshing drum loss sensor and the swing loss sensor falls within the loss amount target range. The loss calculated by the loss sensor is used for feedback control, and the dust delivery valve, chaff sieve and vehicle speed can be controlled to make adjustments so that the loss falls within the loss target range. The combine harvester is characterized in that the loss sensor is arranged at the end of the processing path of the harvested ear stalks, the dust delivery valve and the chaff sieve are connected together with the control device, and the dust delivery valve, the chaff sieve And the driving part performs feedback control so that when the loss value calculated by the loss sensor falls within the loss target range, if the loss exceeds the target range, the control is performed as follows: first, adjust the dust delivery valve, and if it reaches the measured If the loss cannot fall within the limit value of the dust delivery valve within the target range, next, adjust the chaff sieve. If the measured loss cannot fall within the target range, then adjust the vehicle speed; When the loss is lower than the target range, control is performed as follows: Adjust the vehicle speed, and if the vehicle speed limit value at which the measured loss cannot fall within the target range is reached, next, adjust the chaff sieve, and if the measured loss cannot fall within the target The chaff sieve limit value within the range, then next, adjust the dust delivery valve.

Description

technical field [0001] The present invention relates to the technique of detecting grain loss and controlling a dust valve, chaff sieve and vehicle speed related to grain screening according to the loss. Background technique [0002] Conventionally, the technique of the combine harvester which detects the loss amount of a grain is well-known. For example, as described in Patent Document 1. [0003] The purpose of the conventional combine harvester is to detect the wastage amount of grains in different parts by using both the threshing drum wear sensor installed under the rear part of the threshing drum and the swing loss sensor installed in the rear part of the swing screening device. Compared with the target value, the dust delivery valve and chaff sieve are controlled, so as to minimize the loss of grain and fully thresh and recover the grain. [0004] Usually, as the cause of the increase in grain loss, the following situations can be cited: (i) the threshing drum canno...

AI Technical Summary

Problems solved by technology

[0004] Usually, as the cause of the increase in grain loss, the following situations can be cited: (i) the threshing drum cannot be used for smooth threshing, and the amount of grain leaked from the rear end of the receiving net is large; (ii) Because the fin opening of the bran sieve of the swing screening device is too small, the grains will not fall smoothly from the fins

[0005] However, it is difficult to determine whether the increase in grain loss is caused by the above (i) or the above (ii) by the above-mentioned loss sensor, and in order to control the loss to an appropriate target value, as a control One of the means is control to lower the vehicle speed. However, it has the following disadvantages: if the vehicle speed control is performed, the work efficiency will be reduced. In addition, if you want to adjust various controls in the correlation relationship between the loss amount target values, While controlling to reduce the amount of loss, the operator must adjust the control settings for the various control means used for it, which makes the control adjustment correspondingly complicated

Images