CN219468778U

CN219468778U - Self-unloading grain discharging mechanism with adjustable grain discharging position

Info

Publication number: CN219468778U
Application number: CN202320095452.7U
Authority: CN
Inventors: 邓宏; 唐军; 蔡东; 何思贤; 王卿宇
Original assignee: Sichuan Gangyi Technology Group Co ltd
Current assignee: Sichuan Gangyi Technology Group Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-08-04
Anticipated expiration: 2033-02-01

Abstract

The utility model discloses a self-unloading grain discharging mechanism with an adjustable grain discharging position, wherein the bottom of a vertical grain discharging lifting mechanism is connected with one end of a grain bin auger, the top of the vertical grain discharging lifting mechanism is provided with a grain rotating bin, and the outlet of the grain rotating bin is connected with one end of a high-position grain discharging mechanism; the high-position grain unloading mechanism and the granary auger are conveyed in the horizontal direction, and the vertical grain unloading lifting mechanism is conveyed in the vertical direction; the high-position grain unloading mechanism comprises a conveying belt and a high-position grain unloading supporting pipe; the conveying belt can rotate relative to the high-position grain discharging supporting pipe, and an oil cylinder is arranged between the high-position grain discharging supporting pipe and the conveying belt to lift the conveying belt; a thrust ball bearing is arranged at the bottom of the high-position grain unloading supporting tube; the high-position grain unloading supporting tube is provided with a gear which is meshed with a gear driven to rotate by a rotating motor. The oil cylinder and the rotating motor are matched to lift and rotate the conveying belt together, and the position of the grain discharging opening is adjusted.

Description

Self-unloading grain discharging mechanism with adjustable grain discharging position

Technical Field

The utility model relates to the field of agricultural machine design, in particular to a self-discharging grain discharging mechanism with an adjustable grain discharging position.

Background

At present, most of medium and large harvesting machines need to temporarily store harvested crops when finishing harvesting operation, in order to facilitate the harvested crops to be conveyed to freight machines, a grain discharging mechanism is needed to transport the crops, most grain discharging mechanisms of the harvesting machines on the market adopt an auger conveyor (also called a screw conveyor), and in the grain discharging process, the crops and grain discharging pipelines are rubbed for a long time under the rotation of the auger due to longer grain discharging stroke, so that partial damage is generated to the crops, and the quality of the harvested crops is affected. Therefore, other grain conveying equipment is combined with the auger conveyor to shorten the travel of the auger conveyor, and damage to crops is expected to be reduced.

The bucket elevator utilizes a series of hoppers fixedly connected to a traction chain or an adhesive tape to convey bulk materials upwards in the vertical direction or near vertical direction, and normally, the materials are thrown into a bottom storage area of the bucket elevator through external equipment such as a vibrating conveyor, the hoppers scoop up the materials from the storage area below, the hoppers are lifted to the top along with the conveying chain, the hoppers overturn downwards after bypassing a top wheel, and the bucket elevator pours the materials into a receiving groove. Chain driven bucket elevators typically have two parallel drive chains with a pair of drive sprockets on or below and a pair of redirecting sprockets on or below. Bucket elevators are typically provided with a housing to prevent dust from flying in the bucket elevator and to confine the material within the lifting mechanism. The external equipment for providing materials for the bucket elevator is separated from the bucket elevator, is used in a fixed place such as a fixed area in a factory building, and is difficult to be applied to agricultural machinery for harvesting grain crops such as soybeans in the field.

The grain is transported to a high place by a bucket elevator, finally the grain is discharged from a horizontal conveyer belt positioned at the high place, the horizontal conveyer belt is positioned above the whole harvester, and grain receiving equipment follows the tail end of the horizontal conveyer belt. In the harvesting process, the grain receiving position is sometimes required to be adjusted according to the terrain or the grain crop position, so that the grain discharging position of the self-discharging grain discharging mechanism is required to be adjusted.

Disclosure of Invention

The utility model overcomes the defects of the prior art, and provides an implementation mode of a self-unloading grain discharging mechanism with an adjustable grain discharging position, so as to be expected to solve the problem of great damage to grains due to the long auger section of the grain discharging mechanism of the medium-sized harvester.

In order to solve the technical problems, one embodiment of the present utility model adopts the following technical scheme:

the self-unloading grain discharging mechanism comprises a vertical grain discharging lifting mechanism, a high-position grain discharging mechanism and a grain bin auger, wherein the bottom of the vertical grain discharging lifting mechanism is connected with one end of the grain bin auger, the top of the vertical grain discharging lifting mechanism is provided with a grain rotating bin, and an outlet of the grain rotating bin is connected to one end of the high-position grain discharging mechanism; the high-position grain unloading mechanism and the granary auger are conveyed in the horizontal direction, and the vertical grain unloading lifting mechanism is conveyed in the vertical direction; the high-position grain unloading mechanism comprises a conveying belt, a high-position grain unloading supporting pipe and a high-position grain unloading mechanism connecting seat; the high-position grain unloading mechanism connecting seat is fixed at the top end of the high-position grain unloading supporting tube and is rotationally connected with one end of a horizontal conveying belt through a connecting shaft, and the other end of the conveying belt is a grain unloading port; the high-order grain discharging support tube and the conveyor belt are respectively provided with an oil cylinder connecting seat, and two ends of the oil cylinder are respectively and rotatably connected with the oil cylinder connecting seats on the high-order grain discharging support tube and the conveyor belt; the bottom of the high-position grain unloading supporting tube is provided with a bearing installation shaft, and a thrust ball bearing is connected to the bearing installation shaft; the high-order grain discharging support tube is provided with a gear which is meshed with a gear driven to rotate by a rotating motor.

One end of the granary auger is internally connected with an auger butt joint, and the bottom of the vertical grain placing lifting mechanism is provided with a butt joint sleeve, and the auger butt joint is in butt joint with the butt joint sleeve.

The auger butt joint is provided with a butt-joint roll shaft, a steering locking shaft is arranged on the butt-joint roll shaft, and the steering locking shaft is perpendicular to the butt-joint roll shaft and protrudes out of the surface of the butt-joint roll shaft; one end of the butt-joint roll shaft is inserted into the auger shaft and is welded and locked on the auger shaft after being circumferentially fixed through a pin.

The butt joint sleeve is provided with a sleeve handle, one end of the sleeve handle is fixedly provided with a sleeve body, the edge of the sleeve body is provided with a steering locking groove, and the steering locking groove is matched with the steering locking shaft in size, so that the steering locking shaft can be clamped into and separated from the steering locking groove; a butt joint cavity is formed in the sleeve body, and one end of the butt joint roll shaft is inserted into the butt joint cavity; the other end of the sleeve handle is rotationally connected to the frame of the vertical grain-placing lifting mechanism through a bearing.

The vertical grain lifting mechanism is provided with a frame, a grain outlet chain wheel shaft is fixed on the frame, a vertical conveying chain is arranged in the frame, a plurality of hoppers are fixed on the conveying chain, the conveying chain is driven by a chain wheel, the chain wheel comprises an upper chain wheel and a lower chain wheel, the upper chain wheel is arranged on the grain outlet chain wheel shaft, the lower chain wheel is arranged on the butt joint sleeve, and the butt joint sleeve is rotationally connected to the frame.

The upper end of the conveying chain is positioned in the grain transferring bin, when the hopper is conveyed to the upper end of the conveying chain, grains are thrown out when the top end of the hopper is overturned, and the grains enter the high-position grain unloading mechanism from the outlet of the grain transferring bin; the grain guide plate is arranged in the grain rotating bin and comprises an arc-shaped plate and a straight plate, the straight plate is obliquely arranged and is positioned between the grain rotating bin outlet and the upper chain wheel, and the arc-shaped plate is positioned above the grain rotating bin outlet.

The self-unloading grain discharging mechanism with the adjustable grain discharging position further comprises a bracket, and the vertical grain discharging lifting mechanism is fixed on the bracket; and a support tube positioning sleeve is fixed on the support, and the support tube positioning sleeve rotationally connects the high-position grain unloading support tube to the support.

The self-unloading grain discharging mechanism is from a grain bin to a grain discharging port, only the grain bin is conveyed to a vertical grain discharging lifting mechanism by using a packing auger, the vertical grain discharging lifting mechanism directly inputs power through the packing auger, the conveying efficiency of the packing auger and the lifting efficiency are guaranteed to be constant, and the materials are guaranteed not to be blocked at the storage position of the lifting mechanism due to the change of the conveying efficiency, so that grain discharging is not influenced. After the vertical grain discharging lifting mechanism, the materials lifted by the hopper are thrown into the high-position grain discharging mechanism under the guidance of the grain guide plate at the high position, and the mechanism is a conveyor belt, so that the final grain discharging task is completed. The granary and the lifting mechanism are connected by adopting the butt joint sleeve and the auger butt joint to be combined, so that the granary can be independently rotated away from the machine body, and the granary is convenient to maintain and repair. The conveyor belt can be lifted and rotated, so that the position of the grain discharging opening can be adjusted.

Compared with the prior art, the utility model has at least the following beneficial effects: the self-unloading grain discharging mechanism with the adjustable grain discharging position adopts the cooperation of the oil cylinder and the rotating motor to adjust the position of the grain discharging port, the oil cylinder can lift the conveying belt, the conveying belt is lifted to the upper part of other parts, the rotating motor can rotate the high-position grain discharging supporting pipe, and the high-position grain discharging supporting pipe can drive the conveying belt to rotate together when rotating, so that the position of the grain discharging port is adjusted.

Drawings

FIG. 1 is a view of a self-dumping grain delivery mechanism in combination with a grain bin.

Fig. 2 is a view showing the structure of the self-discharging grain discharging mechanism of the present utility model.

Fig. 3 is a high-level grain unloading mechanism of the self-unloading grain unloading mechanism of the utility model.

Fig. 4 is a view showing the construction of a grain bin and a grain bin auger of the self-unloading grain discharging mechanism of the present utility model.

Fig. 5 is a side view of a vertical discharge lifting mechanism of the self-discharging discharge mechanism of the present utility model.

Fig. 6 and 7 show the internal structure of the vertical grain discharging lifting mechanism of the self-discharging grain discharging mechanism.

Fig. 8 is a mating sleeve of the self-dumping mechanism of the utility model.

Fig. 9 is a partial enlarged view of fig. 4.

Fig. 10 is a mating structure of the fork and the eccentric sleeve.

In the figure, the names of the parts represented by the serial numbers are as follows, 1, a vertical grain placing lifting mechanism; 101. a frame; 102. a conveyor chain; 103. a hopper; 104. an upper sprocket; 105. a lower sprocket; 106. a grain outlet chain wheel shaft; 2. high-order grain unloading mechanism; 201. high-order grain discharge supporting tube; 202. a conveyor belt; 203. a grain transferring interface; 204. a grain discharging port; 205. a high-position grain unloading mechanism connecting seat; 206. a connecting shaft; 207. an oil cylinder connecting seat; 208. an oil cylinder; 3. rotating the granary; 301. a grain bin outlet; 302. a straight plate; 303. an arc-shaped plate; 4. granary auger; 401. an auger shaft; 402. auger blades; 5. a granary; 6. bevel gears; 7. an auger butt joint; 701. a butt-joint roller shaft; 702. a steering lock shaft; 703. a pin; 704. a shaft shoulder; 8. a butt joint sleeve; 801. a sleeve handle; 802. a threaded hole; 803. a sleeve body; 804. a steering lock groove; 805. a butt joint cavity; 9. a grain poking plate; 10. a grain poking shaft; 11. a shifting fork; 12. a bearing seat; 13. a reinforcing plate; 14. a bearing; 15. a chain tensioner; 1501. a tensioning plate; 1502. tensioning the pull rod; 16. a gear; 17. a bracket; 18. a support tube positioning sleeve; 19. a bolt; 20. an eccentric sleeve; 21. thrust ball bearings.

Detailed Description

The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, the self-unloading grain discharging mechanism with the adjustable grain discharging position comprises a vertical grain discharging lifting mechanism 1 and a high-position grain discharging mechanism 2; the top of the vertical grain discharging lifting mechanism is provided with a grain rotating bin 3, and an outlet of the grain rotating bin is connected to one end of the high-position grain discharging mechanism; the bottom of the vertical grain lifting mechanism is connected with one end of the granary auger 4. The high-position grain unloading mechanism and the granary auger are conveyed in the horizontal direction, and the vertical grain unloading lifting mechanism is conveyed in the vertical direction.

As shown in fig. 2 and 3, the high-level grain unloading mechanism comprises a high-level grain unloading supporting pipe 201, a horizontal conveying belt 202 and a high-level grain unloading mechanism connecting seat 205; the high-order grain unloading mechanism connecting seat is fixed on the top end of the high-order grain unloading supporting tube, and is rotationally connected with one end of the horizontal conveying belt through the connecting shaft 206. The high-order grain discharging support tube and the conveyer belt are respectively provided with an oil cylinder connecting seat 207, and two ends of the oil cylinder 208 are respectively and rotatably connected with the oil cylinder connecting seats on the high-order grain discharging support tube and the conveyer belt. The bottom of the high-position grain unloading supporting tube is provided with a bearing mounting shaft at a position corresponding to the chassis, and a thrust ball bearing 21 at the bottom of the high-position grain unloading supporting tube is connected to the bearing mounting shaft. When the oil cylinder works, the conveying belt of the high-position grain unloading mechanism can be lifted upwards, and the high-position grain unloading supporting pipe is driven by the rotating motor to rotate, so that the conveying belt of the high-position grain unloading mechanism rotates, and the grain unloading port is adjusted to a proper position for grain unloading operation.

As shown in fig. 3, a grain transferring port 203 is arranged at one end of the conveyor belt close to the high-order grain unloading supporting pipe, and a grain transferring outlet 301 is butted into the grain transferring port 203. A grain placing port 204 is arranged at one end of the conveyor belt far away from the high-position grain discharging supporting tube. The high-order grain discharging support pipe 201 is provided with a gear 16 which is meshed with a gear driven to rotate by a rotating motor, and the rotating motor drives the high-order grain discharging support pipe to automatically rotate. The self-unloading grain discharging mechanism further comprises a bracket 17, and the vertical grain discharging lifting mechanism is fixed on the bracket 17. A support tube positioning sleeve 18 is fixed on the bracket, and the support tube positioning sleeve rotatably connects the high-position grain unloading support tube to the bracket.

The position of the grain discharging port 204 is adjusted by matching the oil cylinder with the rotating motor, the oil cylinder can lift the conveying belt, the conveying belt is lifted to the upper part of other parts, the rotating motor can rotate the high-position grain discharging supporting pipe 201, and the conveying belt is driven to rotate together when the high-position grain discharging supporting pipe 201 rotates, so that the position of the grain discharging port is adjusted.

As shown in fig. 4, the granary auger 4 is horizontally arranged at the bottom outlet of the granary 5, and horizontally conveys grains in the granary to the outside of the granary; one end of the granary auger 4 is connected with a power source through bevel gear 6 transmission, and the other end of the granary auger 4 is internally connected with an auger butt joint 7. The auger butt joint is in butt joint with the butt joint sleeve 8 arranged at the bottom of the vertical grain placing lifting mechanism, the butt joint is convenient to separate, the grain bin is rotated in the state that the auger butt joint is connected with the butt joint sleeve, the auger butt joint can be separated from the butt joint sleeve, the grain bin is independently rotated away from the harvester body, and convenience in treatment such as overhaul is guaranteed. A grain poking plate 9 is arranged in the granary, the grain poking plate is fixed on a grain poking shaft 10, two ends of the grain poking shaft are rotatably connected to the outer wall of the granary, and one end of the grain poking shaft 10 is connected with the upper end of a shifting fork 11. As shown in fig. 10, the shifting fork 11 is inserted into the eccentric sleeve 20 mounted on the auger shaft 401, and the granary auger 4 rotates to drive the shifting fork 11 to swing and drive the grain poking plate 9 to swing back and forth, so that grains in the granary 5 can smoothly enter the granary auger 4, and meanwhile, possible foreign matters are prevented from entering the granary auger 4 to damage the structure.

As shown in fig. 5, 6 and 7, the vertical grain lifting mechanism 1 is provided with a frame 101, a grain outlet sprocket shaft is fixed on the frame, a vertical conveying chain 102 is arranged in the frame, a plurality of hoppers 103 are fixed on the conveying chain, the conveying chain is driven by a sprocket, the sprocket comprises an upper sprocket 104 and a lower sprocket 105, the upper sprocket and the lower sprocket are both arranged in the frame, the upper sprocket is arranged on the grain outlet sprocket shaft 106, the lower sprocket is arranged on the butt joint sleeve 8, and the butt joint sleeve 8 is rotationally connected to the frame. As shown in fig. 7, the upper end of the conveyor chain 102 is positioned in the grain bin and when the hopper is conveyed to the upper end of the chain, the hopper 103 throws grain out as the top end of the chain is turned over, from the grain bin outlet into the high-level grain unloading mechanism. Grain guide plates are arranged in the grain rotating bin and comprise straight plates 302 and arc plates 303, the straight plates are obliquely arranged and positioned between the grain rotating bin outlet 301 and the upper chain wheel 104, and the arc plates are positioned above the grain rotating bin outlet.

As shown in fig. 7, two openings are arranged below the grain rotating bin, one opening is connected with the frame of the vertical grain discharging lifting mechanism, the other opening is a grain rotating bin outlet 301, and the grain rotating bin outlet is connected into a grain rotating interface of the high-position grain discharging mechanism in an opposite mode. As shown in fig. 2, the grain rotating bin 3 is provided with a chain tensioner 15. As shown in fig. 5, the chain tensioner comprises a tensioning plate 1501 having a bar hole and a tensioning rod 1502 welded on the tensioning plate, the tensioning rod being a screw rod, the tensioning rod being moved up and down by an adjusting nut; as shown in fig. 5 and 6, two bolts 19 pass through the strip holes on the tensioning plate to connect the tensioning plate with the grain-discharging chain wheel shaft, so that when the adjusting nut is adjusted, the grain-discharging chain wheel shaft moves within the limit range of the strip holes, and at the moment, the chain can be tensioned or loosened only by controlling the position of the adjusting nut.

As shown in fig. 8, the auger abutment 7 has an abutment roller 701 on which a steering lock shaft 702 is provided, the steering lock shaft being perpendicular to the abutment roller and protruding from the surface of the abutment roller, and a shoulder 704 is provided on the abutment roller between the steering lock shaft and the pin 703. One end of the butt-joint roll shaft is inserted into the auger shaft and is welded and locked on the auger shaft after being circumferentially fixed through a pin 703. And chamfering the end part, close to the auger locking shaft, of the auger pair joint. The shaft shoulder is used for assisting in positioning when the butt-joint roller shaft is inserted into the auger shaft. The butt joint sleeve 8 is provided with a sleeve handle 801, one end of the sleeve handle is provided with a threaded hole 802, the other end of the sleeve handle is fixedly provided with a sleeve body 803, the edge of the sleeve body is provided with a steering locking groove 804, and the steering locking groove is matched with a steering locking shaft 702 on the auger butt joint 7 in size, so that the steering locking shaft can be clamped into and separated from the steering locking groove. The sleeve body is internally provided with a butt joint cavity 805, and one end of a butt joint roll shaft on the auger butt joint is inserted into the butt joint cavity. After the barn returns to the harvester body and is locked, the butt joint sleeve 8 is in butt joint with the auger butt joint 7, the rotational freedom degree of the butt joint sleeve 8 and the auger butt joint 7 is 1, and the butt joint sleeve 8 and the auger butt joint 7 do rotary motion at the same time and cannot be separated.

When the auger butt joint 7 is clamped into the butt joint sleeve 8, the butt joint sleeve correspondingly rotates when the auger butt joint rotates. The granary auger consists of an auger shaft 401 and auger blades 402, and one end of an auger butt joint is inserted into the auger shaft 401 and locked on the auger shaft by a pin 703. As shown in fig. 8, the position of the docking sleeve is fixed, and the position of the auger docking head moves with the movement of the auger so as to be separable from the docking sleeve. The butt joint sleeve and the auger butt joint are very convenient to separate and clamp.

As shown in fig. 9, the screw is engaged with the screw hole 802 to fixedly connect the bearing 14 to the socket 801, the outer edge of the bearing 14 is clamped on the bearing housing 12, the bearing housing 12 and the reinforcing plate 13 are connected to the frame 101 by the bolt 19, and the socket is rotatably connected to the frame by the bearing 14 and the bearing housing 12.

When crops stored in the granary are transported to other transport mechanisms, the crops are transported to the bottom of the vertical grain placing lifting mechanism by using the granary auger, transported to a high place by a hopper fixed on a conveying chain, falls into a grain transferring interface through a grain transferring outlet, and transported to a grain placing opening by using a conveying belt to finish grain placing.

According to the utility model, crops in the granary are input into the vertical grain placing lifting mechanism by utilizing the auger, the hopper in the vertical grain placing lifting mechanism is driven by the chain to grab grains for lifting, the crops are thrown out at the top end and fall onto the conveying belt, the conveying belt is used for completing conveying, and the grain placing operation is completed through the grain placing opening.

According to the utility model, the auger is only used in the grain discharging section below the granary, and the hopper is used for vertical conveying and the belt is used for horizontal conveying in other grain discharging sections, so that the rapid friction between crops and grain discharging pipelines caused by auger conveying is reduced, the mutual abrasion of the two sides is reduced, and the existing problems are effectively solved. The lower end of the vertical grain-releasing lifting mechanism is clamped with the auger by the butt joint sleeve, so that the auger and the vertical grain-releasing lifting mechanism can be smoothly separated and connected.

According to the utility model, the auger is driven to rotate by a power source of the auger, and the butt joint sleeve is clamped with the butt joint of the auger, so that the auger drives the lower chain wheel connected to the butt joint sleeve to synchronously rotate during rotation of the auger, thereby driving the conveying chain to rotate; the conveyor belt uses a power source such as a motor or the like alone.

The utility model can rotate the conveyer belt by matching the oil cylinder and the rotating motor, thereby achieving the purpose of adjusting the position of the grain discharging opening of the conveyer belt.

Although the utility model has been described herein with reference to illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.

Claims

1. The self-unloading grain discharging mechanism is characterized by comprising a vertical grain discharging lifting mechanism, a high-position grain discharging mechanism and a grain bin auger, wherein the bottom of the vertical grain discharging lifting mechanism is connected with one end of the grain bin auger, a grain rotating bin is arranged at the top of the vertical grain discharging lifting mechanism, and an outlet of the grain rotating bin is connected to one end of the high-position grain discharging mechanism; the high-position grain unloading mechanism and the granary auger are conveyed in the horizontal direction, and the vertical grain unloading lifting mechanism is conveyed in the vertical direction; the high-position grain unloading mechanism comprises a conveying belt, a high-position grain unloading supporting pipe and a high-position grain unloading mechanism connecting seat; the high-position grain unloading mechanism connecting seat is fixed at the top end of the high-position grain unloading supporting tube and is rotationally connected with one end of a horizontal conveying belt through a connecting shaft, and the other end of the conveying belt is a grain unloading port; the high-order grain discharging support tube and the conveyor belt are respectively provided with an oil cylinder connecting seat, and two ends of the oil cylinder are respectively and rotatably connected with the oil cylinder connecting seats on the high-order grain discharging support tube and the conveyor belt; the bottom of the high-position grain unloading supporting tube is provided with a bearing installation shaft, and a thrust ball bearing is connected to the bearing installation shaft; the high-order grain discharging support tube is provided with a gear which is meshed with a gear driven to rotate by a rotating motor.

2. The self-unloading grain discharging mechanism with adjustable grain discharging position according to claim 1, wherein one end of the granary auger is internally connected with an auger butt joint, and the bottom of the vertical grain discharging lifting mechanism is provided with a butt joint sleeve, and the auger butt joint is in butt joint with the butt joint sleeve.

3. The self-unloading grain discharging mechanism with adjustable grain discharging position according to claim 2, wherein the auger butt joint is provided with a butt-joint roll shaft, a steering locking shaft is arranged on the butt-joint roll shaft, and the steering locking shaft is perpendicular to the butt-joint roll shaft and protrudes out of the surface of the butt-joint roll shaft; one end of the butt-joint roll shaft is inserted into the auger shaft and is welded and locked on the auger shaft after being circumferentially fixed through a pin.

4. The self-unloading grain discharging mechanism with adjustable grain discharging position according to claim 3, wherein the butt joint sleeve is provided with a sleeve handle, one end of the sleeve handle is fixedly provided with a sleeve body, the edge of the sleeve body is provided with a steering locking groove, and the steering locking groove is matched with the steering locking shaft in size, so that the steering locking shaft can be clamped into and separated from the steering locking groove; a butt joint cavity is formed in the sleeve body, and one end of the butt joint roll shaft is inserted into the butt joint cavity; the other end of the sleeve handle is rotationally connected to the frame of the vertical grain-placing lifting mechanism through a bearing.

5. The self-unloading grain discharging mechanism with adjustable grain discharging position according to claim 2, wherein the vertical grain discharging lifting mechanism is provided with a frame, a grain discharging chain wheel shaft is fixed on the frame, a vertical conveying chain is arranged in the frame, a plurality of hoppers are fixed on the conveying chain, the conveying chain is driven by a chain wheel, the chain wheel comprises an upper chain wheel and a lower chain wheel, the upper chain wheel is arranged on the grain discharging chain wheel shaft, the lower chain wheel is arranged on the butt joint sleeve, and the butt joint sleeve is rotatably connected to the frame.

6. The adjustable self-unloading mechanism of claim 5, wherein the upper end of the conveyor chain is positioned in the grain-transferring bin, and when the hopper is conveyed to the upper end of the conveyor chain, the hopper throws out grains when the top end of the hopper is turned over, and the grains enter the high-level grain-unloading mechanism from the outlet of the grain-transferring bin; the grain guide plate is arranged in the grain rotating bin and comprises an arc-shaped plate and a straight plate, the straight plate is obliquely arranged and is positioned between the grain rotating bin outlet and the upper chain wheel, and the arc-shaped plate is positioned above the grain rotating bin outlet.

7. The adjustable discharge position self-unloading mechanism of claim 1, further comprising a bracket, wherein the vertical discharge lifting mechanism is fixed on the bracket; and a support tube positioning sleeve is fixed on the support, and the support tube positioning sleeve rotationally connects the high-position grain unloading support tube to the support.