A corn harvester

Abstract

The application discloses a corn harvester and relates to the technical field of agricultural equipment, which comprises a power unit, a control unit, a peeling unit, a bunker, a mounting rack, a harvesting unit and an elevator unit, wherein the power unit, the control unit, the peeling unit, the bunker, the harvesting unit and the elevator unit are arranged on the mounting rack, the power unit is in transmission connection with the peeling unit, the harvesting unit and the elevator unit, the harvesting unit comprises a header assembly, a harvesting conveying part, a header frame and a header hydraulic cylinder, the header assembly and the harvesting conveying part are arranged on the header frame, the header assembly is in communication with the harvesting conveying part, the harvesting conveying part is in communication with the elevator unit, the header frame is hingedly arranged on the mounting rack, one end of the header hydraulic cylinder is connected to the mounting rack and the other end is in transmission connection with the header frame, the header hydraulic cylinder controls the height adjustment of the header frame, and the elevator unit is synchronously adjusted along with the header frame, so that the height of the harvesting unit can be adjusted according to requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural equipment, in particular to a corn harvester. BACKGROUND

[0002] The corn harvester is a kind of agricultural implement that uses machinery to complete the harvesting of corn stalks when the corn is mature or close to maturity according to the requirements of agronomy. It is a new type of agricultural machinery developed for new energy development and to reduce the labor intensity of farmers. It is a kind of agricultural machinery that is low in price and suitable for popularization in rural areas. It can harvest corn stalks with complete sets. It shortens the labor cycle of farmers and liberates people from heavy physical labor.

[0003] The height of the cutting table of the corn harvester in the prior art cannot be adjusted, so it cannot be adjusted synchronously when it is used for different varieties and growth periods of corn, and the cutting table is too low, which will affect the movement of the harvester, thereby greatly reducing the adaptability of the harvester. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a corn harvester.

[0005] A corn harvester comprises a power unit, a control unit, a peeling unit, a bunker, a mounting frame, a harvesting unit and an elevator unit. The power unit, the control unit, the peeling unit, the bunker, the harvesting unit and the elevator unit are arranged on the mounting frame. The power unit is drivingly connected to the peeling unit, the harvesting unit and the elevator unit. The harvesting unit comprises a cutting table assembly, a harvesting conveying part, a cutting table frame and a cutting table hydraulic cylinder. The cutting table assembly and the harvesting conveying part are mounted on the cutting table frame. The cutting table assembly is connected to the harvesting conveying part. The harvesting conveying part is connected to the elevator unit. The cutting table frame is hingedly arranged on the mounting frame. One end of the cutting table hydraulic cylinder is connected to the mounting frame, and the other end is drivingly connected to the cutting table frame. The cutting table hydraulic cylinder controls the height adjustment of the cutting table frame. The elevator unit is synchronously adjusted with the cutting table frame.

[0006] Further, the elevator unit comprises an upper elevator shell, a lower elevator shell and an elevator mechanism. The upper elevator shell is fixedly arranged. One end of the lower elevator shell close to the upper end is hingedly connected to the lower end of the upper elevator shell. The elevator mechanism is arranged in the upper elevator shell and the lower elevator shell. One end of the lower elevator shell close to the lower end is arranged at the cutting table frame and is connected to the harvesting conveying part. A sliding part is arranged on the cutting table frame. A sliding plate is arranged on the lower end of the lower elevator shell. The sliding part is below the sliding plate.

[0007] Further, the sliding part comprises a sliding fixed seat and a sliding bearing. The sliding fixed seat is fixedly mounted on the cutting table frame. The sliding bearing is rotatably arranged on the sliding fixed seat. The sliding bearing is in rolling contact with the lower surface of the sliding plate.

[0008] Further, the upper lifting shell is provided with side plates on both sides of the end close to the lower lifting shell, and the end of the lower lifting shell close to the upper lifting shell is between the two side plates.

[0009] Further, the sliding plate is arranged in an inclined manner.

[0010] Further, the sliding member and the sliding plate are provided in two respectively, the two sliding plates are arranged on both sides of the lower lifting shell, and the two sliding members are arranged on the cutter frame and are in rolling cooperation with the sliding plates on both sides.

[0011] Further, the elevator unit further comprises an upper fan and a lower fan, the side of the upper lifting shell away from the lower lifting shell is provided with a separation part and a straw discharge part, the separation part is directly above the peeling unit, the straw discharge part is in communication with the separation part, one end of the upper fan is communicated to the upper end of the upper lifting shell, the other end of the upper fan is communicated to the separation part, the output direction of the upper fan faces the straw discharge part, the lower fan is installed below the upper lifting shell, and the air outlet of the lower fan faces downward to the straw discharge part.

[0012] Further, the included angle formed by the upper lifting shell and the horizontal plane is 45°-65°.

[0013] Further, the straw discharge part is arranged in a bent manner, the included angle formed by the bent straw discharge part is 95°-125°, and the side of the straw discharge part in communication with the separation part is higher than the side away from the separation part.

[0014] Further, the separation part comprises a feed inlet, a material inlet and a crushed material inlet, the feed inlet is in communication with the upper lifting shell, the material inlet is arranged downward and in communication with the peeling unit, and the crushed material inlet is in communication with the straw discharge part.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] Firstly, the harvesting unit in the scheme comprises a cutter assembly, a harvesting conveying part, a cutter frame and a cutter hydraulic cylinder, the cutter assembly and the harvesting conveying part are installed on the cutter frame, the cutter assembly is communicated to the harvesting conveying part, the harvesting conveying part is communicated to the elevator unit, the cutter frame is hingedly arranged on the mounting frame, one end of the cutter hydraulic cylinder is connected to the mounting frame and the other end is drivingly connected to the cutter frame, the cutter hydraulic cylinder controls the height adjustment of the cutter frame, the elevator unit is synchronously adjusted with the cutter frame, the height of the cutter frame is pushed by the cutter hydraulic cylinder, so that the setting height of the cutter assembly is changed, and when the harvester is moving, the harvesting unit can be lifted, so that the collision between the harvesting unit and the surrounding terrain during movement is prevented.

[0017] Secondly, the elevator unit comprises an upper elevator, a lower elevator and an elevator mechanism, the upper elevator is fixedly arranged, the upper elevator is fixedly connected with the mounting table, one end of the lower elevator close to the upper elevator is hingedly connected with the lower end of the upper elevator, the elevator mechanism is arranged in the upper elevator and the lower elevator, one end of the lower elevator close to the bottom is arranged at the cutting platform and communicates with the harvesting conveying part, a sliding piece is arranged on the cutting platform, a sliding plate is arranged on the lower elevator, the sliding piece is below the sliding plate, the hinged cooperation of the upper elevator and the lower elevator can ensure the flexibility of the arrangement of the lower elevator, the cooperation of the sliding piece and the sliding plate can ensure that the elevator unit can be adjusted synchronously with the harvesting unit, when the cutting platform is lifted upward, the sliding plate is pushed upward by the sliding piece to drive the lower elevator to rotate upward, when the cutting platform moves downward, the sliding plate loses the support of the sliding piece and rotates downward under the action of gravity.

[0018] Thirdly, the sliding piece comprises a sliding fixed seat and a sliding bearing, the sliding fixed seat is fixedly installed on the cutting platform, the sliding bearing is rotatably arranged on the sliding fixed seat, the sliding bearing rolls with the lower surface of the sliding plate, the rolling friction can greatly reduce the friction force when the sliding piece and the sliding plate cooperate, further improving the flexibility and stability of the equipment control and the service life of the equipment.

[0019] Fourthly, the elevator unit further comprises an upper fan and a lower fan, one side of the upper elevator away from the lower elevator is provided with a separation part and a grass discharge part, the separation part is directly above the peeling unit, the grass discharge part communicates with the separation part, one end of the upper fan communicates with the upper end of the upper elevator, the other end communicates with the upper end of the separation part, the output direction of the upper fan faces the grass discharge part, the lower fan is installed below the upper elevator, the air outlet of the lower fan faces the grass discharge part, the material corn is conveyed to the separation part by the elevator mechanism, at this time, the upper fan and the lower fan are used to remove the broken material in the corn, the suction force generated by the operation of the upper fan guides the airflow in the upper elevator to the upper fan, at the same time, the input airflow can suck the small broken material on the upper elevator, the airflow is compressed to the grass discharge part, at this time, the air flow rate in the grass discharge part increases, the air pressure in the grass discharge part decreases, so the airflow in the upper elevator is compressed into the grass discharge part, thereby further improving the separation effect of the impurity removal mechanism on the material and the grass, the material is blown upward by the lower fan, at this time, the relatively light grass and small broken material are blown to the grass discharge part for discharge under the action of the wind, the relatively heavy corn directly falls through the peeling unit for further processing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The overall structure of the corn harvester Figure 1 ;

[0021] Figure 2 The overall structure of the corn harvester Figure 2 ;

[0022] Figure 3 The overall structure of the corn harvester Figure 3 ;

[0023] Figure 4 The Figure 2 enlarged structure diagram of A in the middle;

[0024] Figure 5 The mechanism diagram of the elevator unit;

[0025] Figure 6 The running state diagram of the elevator unit Figure 1 ;

[0026] Figure 7 The running state diagram of the elevator unit Figure 2 ;

[0027] Figure 8 The cooperation diagram of the sliding piece and the sliding plate;

[0028] Figure 9 The structure diagram of the straw discharge part.

[0029] The drawing mark: power unit 1, control unit 2, peeling unit 3, bin 4, mounting frame 5, harvesting unit 6, header assembly 61, harvesting conveying part 62, header frame 63, sliding piece 631, sliding fixing seat 6311, sliding bearing 6312, header hydraulic cylinder 64, elevator unit 7, upper elevator shell 71, separation part 711, feeding port 7111, material port 7112, crushed material port 7113, straw discharge part 712, lower elevator shell 72, sliding plate 721, elevator mechanism 73, side plate 74, upper fan 75, lower fan 76. DETAILED DESCRIPTION

[0030] The drawings are attached Figures 1-9As shown, a corn harvester includes a power unit 1, a control unit 2, a peeling unit 3 and a bin 4, a mounting frame 5, a harvesting unit 6 and an elevator unit 7, the power unit 1, the control unit 2, the peeling unit 3, the bin 4, the harvesting unit 6 and the elevator unit 7 are arranged on the mounting frame 5, the mounting frame provides the mounting position of the overall device, the power unit 1 is drivingly connected to the peeling unit 3, the harvesting unit 6 and the elevator unit 7, the overall power of the harvester is provided by the power unit 1, while the power output of each unit can be met, the control unit 2 can control the power output of the power unit 1, so that the power unit 1 realizes the movement of the corn harvester, the harvesting, stalk removal and other actions of the corn are realized by the harvesting unit 6, the corn material after harvesting is lifted by the elevator unit 7, at the same time, part of the stalk blades in the input corn material are separated and discharged by the elevator unit 7, and the corn fruit material is put into the peeling unit 3, the peeling action of the corn is realized by the peeling unit 3, and the peeled corn is put into the bin 4 for storage.

[0031] Preferably, the harvesting unit 6 includes a header assembly 61, a harvesting conveying part 62, a header frame 63 and a header hydraulic cylinder 64, the header assembly 61 and the harvesting conveying part 62 are mounted on the header frame 63, the header assembly 61 is communicated to the harvesting conveying part 62, the harvesting conveying part 62 is communicated to the elevator unit 7, the header frame 63 is hingedly arranged on the mounting frame 5, one end of the header hydraulic cylinder 64 is connected to the mounting frame 5 and the other end is drivingly connected to the header frame 63, the header hydraulic cylinder 64 controls the height adjustment of the header frame 63, the elevator unit 7 is synchronously adjusted with the header frame 63, the height of the header frame 63 can be pushed by the header hydraulic cylinder 64, so as to change the setting height of the header assembly 61, when the harvester is moving, the harvesting unit 6 can be lifted, so as to prevent the harvesting unit 6 from colliding with the surrounding terrain during movement, thereby improving the safety of the device, similarly, during harvesting, the height of the crops can also be adaptively adjusted, thereby further improving the harvesting efficiency of the crops, the corn is harvested by the header assembly 61, the harvested corn enters the harvesting conveying part 62, the corn is conveyed to the elevator unit 7 by the harvesting conveying part 62, so as to further process the corn, at the same time, the header frame 63 in the scheme synchronously drives the elevator unit 7 to adjust during adjustment, so as to prevent the gap between the docking positions of the elevator and the harvesting conveying part 62 from being too large, thereby causing the corn or the stalk to fall or be stuck, thereby affecting the normal operation of the device.

[0032] Optionally, the cutting head assembly 61 in the scheme can adopt the corn cutting head commonly used in the prior art, including a chain and a cutter, and the power unit 1 is drivingly connected to the chain and the cutter. In operation, the chain continuously operates to pull the corn stalks to the cutting head conveying part, the corn stalks are stripped of leaves in the pulling process, and the cutter cuts the corn stalks, and the corn is conveyed to the harvesting conveying part 62 by the cutting head assembly 61 for further processing.

[0033] Optionally, the harvesting conveying part 62 in the scheme can adopt a screw conveyor type structure. The screw conveyor is continuously driven to rotate by the power unit 1, and the corn in the harvesting conveying part is conveyed and delivered by the screw conveyor, so that the corn enters the elevator unit 7 and is further delivered by the elevator unit 7.

[0034] Optionally, the harvesting conveying part 62 can also adopt a conveyor belt structure. The conveyor belt is continuously driven to operate by the power unit 1, the corn is conveyed to the conveyor belt by the cutting head assembly 61, and the corn is delivered to the elevator part for further delivery action.

[0035] Optionally, the peeling unit 3 in the scheme can adopt an existing peeling mechanism. A plurality of peeling rollers are arranged. Adjacent two peeling rollers rotate in opposite directions. The plurality of peeling rollers are driven to rotate in opposite directions by the power unit. The friction between the peeling rollers and the corn can automatically remove the husk on the corn, and the corn after peeling is conveyed to the silo for storage.

[0036] Preferably, the elevator unit 7 comprises an upper elevator shell 71, a lower elevator shell 72 and an elevator mechanism 73. The upper elevator shell 71 is fixedly arranged and fixedly connected to the mounting table. The lower end of the upper elevator shell 71 is hingedly connected to the lower end of the upper elevator shell 71. The elevator mechanism 73 is arranged in the upper elevator shell 71 and the lower elevator shell 72. The lower end of the lower elevator shell 72 is arranged at the cutting head frame 63 and communicates with the harvesting conveying part 62. The cutting head frame 63 is provided with a sliding piece 631. The lower end of the lower elevator shell 72 is provided with a sliding plate 721. The sliding piece 631 is below the sliding plate 721. The hinged cooperation of the upper elevator shell 71 and the lower elevator shell 72 can ensure the flexibility of the arrangement of the lower elevator shell 72. The cooperation of the sliding piece 631 and the sliding plate 721 can ensure that the elevator unit 7 can be adjusted synchronously with the harvesting unit 6. When the cutting head frame 63 is lifted upward, the sliding plate 721 is pushed upward by the sliding piece 631 to rotate the lower elevator shell 72 upward. When the cutting head frame 63 moves downward, the sliding plate 721 loses the support of the sliding piece 631 and rotates the lower elevator shell 72 downward under the action of gravity.

[0037] Optionally, the sliding piece 631 comprises a sliding fixed seat 6311 and a sliding bearing 6312, the sliding fixed seat 6311 is fixedly installed on the header frame 63, the sliding bearing 6312 is rotationally arranged on the sliding fixed seat 6311, the sliding bearing 6312 is rolling matched with the lower surface of the sliding plate 721, the rolling friction can greatly reduce the friction when the sliding piece 631 and the sliding plate 721 are matched, further improve the flexibility and stability of the equipment control, and improve the service life of the equipment.

[0038] Preferably, the sliding plate 721 is arranged obliquely, and the sliding piece 631 is pushed to move during the adjustment of the header frame 63, the cooperation of the sliding piece 631 and the oblique sliding plate 721 generates lifting force, so that the lifting action of the lower lifting shell 72 can be more easily realized.

[0039] Preferably, the upper lifting shell 71 is provided with side plates 74 on both sides near one end of the lower lifting shell 72, and the lower lifting shell 72 is located between the two side plates 74 near the one end of the upper lifting shell 71. The side plates 74 can limit the lower lifting shell 72, thereby ensuring the stability of the lower lifting shell 72 during rotation. The side plates 74 can also shield the gap between the upper lifting shell 71 and the lower lifting shell 72, thereby preventing corn and straw from being stuck between the upper lifting shell 71 and the lower lifting shell 72, and ensuring the flexible adjustment of the lower lifting shell 72.

[0040] Optionally, the lifting mechanism 73 in the present scheme can adopt the lifting device in the prior art, including a driving wheel, a driven wheel and a lifting conveyor belt, the power unit 1 is drivingly connected to the driving force, and the lifting conveyor belt is driven to rotate by the driving force, thereby realizing the lifting action of the corn on the lifting conveyor belt.

[0041] Optionally, the lifting mechanism 73 in the present scheme can also adopt a chain wheel mechanism to realize the lifting action of the corn, including a driving chain wheel, a driven chain wheel, a lifting chain and a lifting plate, the power unit 1 is drivingly connected to the driving chain wheel, the lifting chain is driven to reciprocatingly rotate on the driving chain wheel and the driven chain wheel by the driving chain wheel, the lifting plate is provided with a plurality of lifting portions, and the plurality of lifting portions are arranged at intervals on the lifting chain, the lifting plate is driven to reciprocatingly move by the lifting chain, and the corn is driven to lift by the lifting plate.

[0042] Preferably, the sliding member 631 and the sliding plate 721 are provided with two respectively, two sliding plates 721 are provided on both sides of the lower elevator shell 72, and two sliding members 631 are provided on the header frame 63 and are in rolling cooperation with the two sliding plates 721 respectively. By providing the sliding plates 721 on both sides of the lower elevator shell 72 and cooperating with the sliding members 631 on both sides of the header frame 63, the force balance during the adjustment of the header can be ensured, thereby further improving the adjustment stability of the equipment.

[0043] Preferably, the elevator unit 7 further comprises an upper fan 75, a lower fan 76, and the upper elevator shell 71 is provided with a separation part 711 and a straw discharge part 712 on the side away from the lower elevator shell 72. The separation part 711 is directly above the peeling unit 3, the straw discharge part 712 is in communication with the separation part 711, one end of the upper fan 75 is communicated to the upper end of the upper elevator shell 71, and the other end is communicated to the upper end of the separation part 711. The output direction of the upper fan 75 is toward the straw discharge part 712, and the lower fan 76 is installed below the upper elevator shell 71. The air outlet of the lower fan 76 is downward to the straw discharge part 712. The material corn is transported to the separation part 711 by the elevator mechanism 73, and at this time the upper fan 75 and the lower fan 76 are used to remove the broken material in the corn;

[0044] Wherein: the suction force generated by the operation of the upper fan 75 guides the airflow in the upper elevator shell 71 into the upper fan 75, and at the same time the input airflow will suck the fine broken material on the upper elevator shell 71, and the airflow is pressed to the straw discharge part 712 for discharge. At this time, the air flow rate in the straw discharge part 712 increases, which reduces the air pressure in the straw discharge part 712. Therefore, the airflow in the upper elevator shell 71 is pressed into the straw discharge part 712, thereby further improving the separation effect of the impurity removal mechanism on the material and weeds;

[0045] The material is blown upward by the lower fan 76, and at this time the relatively light straw and fine debris will be blown to the straw discharge part 712 for discharge under the action of the wind force, and the relatively heavy corn will directly fall through the peeling unit 3 for further processing.

[0046] Preferably, the angle between the upper elevator shell 71 and the horizontal plane is 45°-65°, and the angle between the upper elevator shell 71 and the horizontal plane is 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64° or 65°. The inclination of the upper elevator shell 71 can further reduce the size of the corn harvester, and can facilitate the transportation of the corn material to the top of the harvester for further processing. The inclination angle of the upper elevator shell 71 can be adjusted according to the height of the header.

[0047] Optionally, the grass discharging part 712 is bent, and an included angle formed by the bent grass discharging part 712 is 95°-125°, the included angle formed by the bent grass discharging part 712 is 95°, 96°, 97°, 98°, 99°, 100°, 101°, 102°, 103°, 104°, 105°, 106°, 107°, 108°, 109°, 110°, 111°, 112°, 113°, 114°, 115°, 116°, 117°, 118°, 119°, 120°, 121°, 122°, 123°, 124° or 125°, the bent grass discharging part 712 can guide and discharge the forage to the side end of the harvester, meanwhile, if the bending angle of the grass discharging part 712 is too large, the discharging direction of the forage is close to the equipment, and the forage is easily sucked into the harvester again, if the bending angle of the grass discharging part 712 is too small, the forage is blocked in the bending area of the grass discharging part 712, and the forage is not smoothly discharged.

[0048] Preferably, the side of the grass discharging part 712 communicating with the separating part 711 is higher than the side away from the separating part 711, when the material passes through the grass discharging part 712, the forage slides along the grass discharging part 712, and the smooth discharge of the forage is further ensured.

[0049] Preferably, the separating part 711 comprises a feeding port 7111, a material port 7112 and a crushed material port 7113, the feeding port 7111 communicates with the ascending conveying shell 71, the material port 7112 is arranged downward and communicates with the peeling unit 3, and the crushed material port 7113 communicates with the grass discharging part 712, so that the separating operation of the corn material is ensured, and the operation efficiency of the subsequent peeling unit 3 is improved.

[0050] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0051] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0052] In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A maize harvester comprising a power unit (1), a control unit (2), a husking unit (3) and a bunker (4), characterized in that, The assembly includes a mounting frame (5), a harvesting unit (6), and a lift unit (7). The power unit (1), control unit (2), peeling unit (3), hopper (4), harvesting unit (6), and lift unit (7) are mounted on the mounting frame (5). The power unit (1) drives the peeling unit (3), harvesting unit (6), and lift unit (7). The harvesting unit (6) includes a header assembly (61), a harvesting conveyor (62), a header frame (63), and a header hydraulic cylinder (64). The header assembly (61) and the harvesting conveyor (62) are mounted on the header frame (63). The header assembly (61) is connected to the harvesting conveyor (62), and the harvesting conveyor (62) is connected to the elevator unit (7). The header frame (63) is hinged on the mounting frame (5). One end of the header hydraulic cylinder (64) is connected to the mounting frame (5), and the other end is driven to the header frame (63). The header hydraulic cylinder (64) controls the header frame (63) to adjust its height. The elevator unit (7) adjusts synchronously with the header frame (63). The lifting unit (7) includes an upper lifting shell (71), a lower lifting shell (72), and a lifting mechanism (73). The upper lifting shell (71) is fixedly installed. The upper end of the lower lifting shell (72) is hinged to the lower end of the upper lifting shell (71). The lifting mechanism (73) is installed inside the upper lifting shell (71) and the lower lifting shell (72). The lower end of the lower lifting shell (72) is installed at the cutting table frame (63) and communicates with the harvesting conveyor (62). A sliding member (631) is installed on the cutting table frame (63), and a sliding plate (721) is installed on the lower lifting shell (72). The sliding member (631) is located below the sliding plate (721).

2. A corn harvester according to claim 1, characterized in that The sliding component (631) includes a sliding fixed seat (6311) and a sliding bearing (6312). The sliding fixed seat (6311) is fixedly installed on the cutting table frame (63), and the sliding bearing (6312) is rotatably mounted on the sliding fixed seat (6311). The sliding bearing (6312) is in rolling contact with the lower surface of the sliding plate (721).

3. A corn harvester according to claim 1, wherein The ascending shell (71) has side plates (74) on both sides near the lower ascending shell (72), and the lower ascending shell (72) is located between the two side plates (74) at the end near the ascending shell (71).

4. A corn harvester according to claim 1, wherein, The sliding plate (721) is inclined.

5. A corn harvester according to claim 1, wherein Two sliding elements (631) and two sliding plates (721) are respectively provided. The two sliding plates (721) are respectively provided on both sides of the lower lifting shell (72). The two sliding elements (631) are provided on the cutting table frame (63) and respectively roll in cooperation with the sliding plates (721) on both sides.

6. A corn harvester according to claim 1, wherein, The elevator unit (7) further comprises an upper fan (75) and a lower fan (76), the upper elevator shell (71) is provided with a separation part (711) and a straw discharging part (712) on the side away from the lower elevator shell (72), the separation part (711) is directly above the peeling unit (3), the straw discharging part (712) is communicated with the separation part (711), one end of the upper fan (75) is communicated to the upper end of the upper elevator shell (71), the other end of the upper fan (75) is communicated to the separation part (711), the output direction of the upper fan (75) is towards the straw discharging part (712), the lower fan (76) is installed below the upper elevator shell (71), and the air outlet of the lower fan (76) is towards the straw discharging part (712).

7. A corn harvester according to claim 6, characterized in that The included angle between the upper elevator shell (71) and the horizontal plane is 45°-65°.

8. A corn harvester according to claim 6, wherein, The straw discharging part (712) is bent, the included angle formed by the bending of the straw discharging part (712) is 95°-125°, and the side of the straw discharging part (712) communicated with the separation part (711) is higher than the side away from the separation part (711).

9. A corn harvester according to claim 6, wherein, The separation part (711) comprises a feeding port (7111), a material port (7112) and a crushed material port (7113), the feeding port (7111) is communicated with the upper elevator shell (71), the material port (7112) is downwardly arranged and communicated with the peeling unit (3), and the crushed material port (7113) is communicated with the straw discharging part (712).

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