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CN-121986647-A - Combine harvester

CN121986647ACN 121986647 ACN121986647 ACN 121986647ACN-121986647-A

Abstract

The invention provides a combine harvester, which can improve screening precision of a screening part on threshing processed objects. The combine harvester is provided with a threshing part for threshing crops, a swing screening device (43) for screening threshing objects threshed by the threshing part, and a thresher (47) for conveying screening wind to the swing screening device (43), wherein the swing screening device (43) is provided with a grain screen (130) for screening the threshing objects, and the grain screen (130) is arranged to rotate in a manner that the windward side of the screening wind is taken as a support shaft part (138) and the windward side of the screening wind moves up and down.

Inventors

  • MASANO JUNICHI
  • Yi Cangjin

Assignees

  • 洋马控股株式会社

Dates

Publication Date
20260508
Application Date
20251104
Priority Date
20241106

Claims (9)

  1. 1. A combine harvester is provided with a threshing part for threshing crops, a swing screening device for screening threshing objects threshed by the threshing part, and a thresher for conveying screening wind to the swing screening device, It is characterized in that the method comprises the steps of, The swing screening device is provided with a grain screen for screening threshing treatment objects, The grain sieve is provided so as to be rotatable so that a leeward side of the screening wind is a spindle portion and a windward side of the screening wind is moved up and down.
  2. 2. A combine harvester according to claim 1, characterized in that, The swing screening device is provided with a coarse screen which is arranged above the grain screen and screens threshing treatment objects, The coarse screen comprises a plurality of blades which are arranged in a manner of adjusting the inclination angle, and is configured to adjust the downward leakage amount of the threshing processed object according to the inclination angle of the blades, The grain sieve is configured to rotate in conjunction with a change in the angle of inclination of the plurality of blades.
  3. 3. A combine harvester according to claim 1 or claim 2, characterized in that, The swing screening device comprises a grain tray which is arranged at the front side of the grain screen and receives threshing objects leaked downwards from the coarse screen, A plurality of screen wire parts are arranged in parallel on the rear side of the grain tray.
  4. 4. A combine harvester according to claim 1, characterized in that, The swing screening device is arranged between the left side plate part and the right side plate part, The left and right outer side plate portions of the left and right side plate portions are provided with an opening portion including at least a part of the grain sieve in an opening range when viewed from the side.
  5. 5. A combine harvester according to claim 2, characterized in that, The combine harvester further comprises: a processed object amount detection sensor for detecting the amount of the threshing processed object on the coarse screen, and A control unit that controls the inclination angles of the plurality of blades based on the detection value of the processed object amount detection sensor, The grain sieve is configured to rotate in conjunction with a change in the angle of inclination of the plurality of blades.
  6. 6. A combine harvester according to claim 5, characterized in that, The combine harvester further comprises a second processed object amount detection sensor which is arranged on the upwind side of the screening wind relative to the grain screen and detects the amount of threshing processed objects, The control unit corrects the angle of the grain sieve in the control based on the detection value of the second processed amount detection sensor.
  7. 7. A combine harvester according to claim 5 or claim 6, characterized in that, The swing screening device is arranged between the left side plate part and the right side plate part, The combine harvester further comprises an actuator which is arranged on any one of the left side plate part and the right side plate part and changes the inclination angle of the blades.
  8. 8. A combine harvester is provided with a threshing part for threshing crops, a swing screening device for screening threshing objects threshed by the threshing part, and a thresher for conveying screening wind to the swing screening device, It is characterized in that the method comprises the steps of, The swing screening device has: a coarse screen configured to vary a downward leakage amount of the threshing processed object according to an inclination angle of the plurality of blades, and A grain sieve which is arranged below the coarse sieve and screens threshing treatment objects, The grain sieve is provided so as to be rotatable with the leeward side of the screening wind as a spindle portion so that the windward side of the screening wind moves up and down, The combine harvester further comprises: a processed object amount detection sensor that detects an amount of threshing processed objects on the coarse screen; a second processed matter amount detection sensor provided on the upstream side of the screening wind with respect to the grain screen and detecting the amount of the threshing processed matter, and And a control unit that performs control for adjusting the inclination angle of the plurality of blades based on the detection value of the processed-material-amount detection sensor and control for adjusting the rotation angle of the grain sieve based on the detection value of the second processed-material-amount detection sensor.
  9. 9. A combine harvester according to claim 8, characterized in that, The swing screening device is arranged between the left side plate part and the right side plate part, The combine harvester further comprises: a first actuator provided on either one of the left and right side plate portions and changing the inclination angle of the plurality of blades, and And a second actuator provided to either one of the left and right side plate portions and configured to change a rotation angle of the grain sieve.

Description

Combine harvester Technical Field The present invention relates to a combine harvester including a swing screening device for screening grains threshed by a threshing unit. Background The combine harvester has a structure in which crops cut by a cutting and harvesting part are conveyed by a conveying device and supplied to a threshing part, and grains (threshing processed objects) threshed by the threshing part are screened by a screening part arranged below the threshing part. The screening unit has a swing screening device for screening grains by swinging. The swing screening apparatus includes a coarse screen having a plurality of blades, and a grain screen disposed below the coarse screen. In addition, the screening unit is provided with a structure for generating screening wind for obtaining a wind screening action, such as a thresher and a fan. Regarding the structure of the screening unit, patent document 1 describes a structure in which the area of the grain screen can be changed and the amount of screening wind flowing over the grain screen can be switched for the screening wind from the thresher. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 6-292448 Disclosure of Invention In the conventional screening unit, for example, when the amount of the threshing processed product is large, there is a problem that the screening accuracy of the threshing processed product cannot be sufficiently obtained in the screening unit. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a combine harvester capable of improving screening accuracy of a screening unit for threshing processed objects. The combine harvester comprises a threshing part for threshing crops, a swing screening device for screening threshing objects threshed by the threshing part, and a thresher for conveying screening wind to the swing screening device, wherein the swing screening device is provided with a grain screen for screening the threshing objects, and the grain screen is arranged to rotate in a mode that the windward side of the screening wind is taken as a supporting shaft part and the windward side of the screening wind moves up and down. The combine harvester according to the present invention is characterized in that the swing screening device includes a coarse screen provided above the grain screen and screening the threshing processed object, the coarse screen includes a plurality of blades provided so as to be capable of adjusting an inclination angle, and is configured to adjust a downward leakage amount of the threshing processed object according to the inclination angle of the plurality of blades, and the grain screen is provided so as to rotate in conjunction with a change in the inclination angle of the plurality of blades. The combine harvester according to the present invention is characterized in that the swing screening device includes a grain tray provided on a front side of the grain sieve and receiving threshing objects leaked downward from the coarse sieve, and a screen portion provided on a rear side of the grain tray and having a plurality of screen line portions arranged in parallel. In the combine according to the present invention, the swing screening device is provided between left and right side plate portions, and an opening portion including at least a part of the grain sieve in an opening range when seen from the side is provided in left and right outer side plate portions of the left and right side plate portions. A combine harvester according to the present invention includes a threshing unit configured to perform threshing of a crop, a swing screening device configured to screen a threshing processed object threshed by the threshing unit, and a thresher configured to convey screening wind to the swing screening device, wherein the swing screening device includes a coarse screen configured to change a downward leakage amount of the threshing processed object according to an inclination angle of a plurality of blades, and a grain screen provided below the coarse screen and configured to screen the threshing processed object, and further includes a processed object amount detection sensor configured to detect an amount of the threshing processed object on the coarse screen, and a control unit configured to perform control to adjust an inclination angle of the plurality of blades based on a detection value of the processed object amount detection sensor, wherein the grain screen is configured to be rotatably supported so as to allow an upwind side of the screening wind to move up and down with a downwind side of the screening wind as a support shaft, and to rotate in association with the change of the inclination angle of the plurality of blades. In the combine according to another aspect of the present invention, the combine further includes a second processed-material-amount detection sen