WO2022141988A1

WO2022141988A1 - Combine harvester

Info

Publication number: WO2022141988A1
Application number: PCT/CN2021/089968
Authority: WO
Inventors: 邢立成; 王军; 王佳军
Original assignee: 江苏沃得农业机械股份有限公司
Priority date: 2020-12-30
Filing date: 2021-04-26
Publication date: 2022-07-07
Also published as: CN112690086A

Abstract

Provided is a combine harvester. A feeding port is provided in the middle of a frame (2), so that a connecting port between a crop conveying structure communicating with the frame and a header (41) is located in the position of the header (41) that is close to the middle, and crops are fed into the connecting port from two sides of the header (41) more uniformly; moreover, a scattering structure is arranged close to a grain storage assembly, and the Chinese character "几"-shaped threshing direction of a double-spiral threshing conveying system is used, such that the crops enter the middle of the front end of the harvester and are scattered out of the middle of the tail end of the harvester, and the stability of the gravity center of the combine harvester is ensured. A cleaning transmission system is arranged on an outer side of a threshing system, centralized transmission is realized, and mounting and debugging are facilitated. The whole combine harvester has a compact structure, occupies a small space, is kept stable all the time in idle operation and harvesting operation processes, has high maneuverability and has significant operation efficiency.

Description

a combine harvester

technical field

The present application relates to the technical field of agricultural machinery, in particular to a combine harvester.

Background technique

The threshing system of the crawler combine harvester can be divided into a longitudinal axial flow threshing and cleaning system and a horizontal axial flow threshing and cleaning system. These two forms of threshing and cleaning systems are the main structural forms currently used in the market.

The length of the longitudinal axial flow drum is long, so that the crops can have time to be fully threshed and separated in the drum. However, if the length is too long, the length of the entire machine will inevitably be lengthened, the structure is not compact enough, the machine is not flexible enough during operation or turning, and the maneuverability is poor , the work efficiency is low.

The horizontal axial flow drum mainly includes a single drum horizontal axial flow threshing system and a 1.5-drum horizontal axial flow threshing system. Although its layout on the harvester is shorter than the overall length of the vertical axial flow, the threshing stroke is short due to its short drum stroke. less than one-half of the longitudinal axial flow. When encountering varieties that are difficult to thresh, such a short drum cannot allow sufficient time for the crops to be threshed in the drum, and finally some of the fed crops will be discharged from the body before threshing, and the loss of crops will increase. Therefore, the existing mainstream combine harvesters cannot achieve high mobility while ensuring high harvesting efficiency.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present application is to overcome the inability of combining harvesting in the prior art to achieve high mobility and high working efficiency at the same time.

To this end, the present application proposes a combine harvester, comprising: a frame, a running mechanism is arranged under the chassis of the frame; a power assembly, a harvesting assembly, a cab, a threshing cleaning system, and a cleaning transmission system are arranged above the chassis of the frame and grain storage components;

The harvesting assembly includes a header and a crop conveying structure; the cab and the crop conveying structure are arranged side by side at the front of the frame;

The threshing and cleaning system includes a double-screw threshing and conveying system, which has a double-shaped threshing direction; the threshing and cleaning system and the grain storage assembly are arranged in parallel at the rear of the frame; the crop conveying structure communicates with the The feeding port of the threshing and cleaning system; the feeding port is arranged at the front end of the threshing and cleaning system and is close to the grain storage component; the distributing structure in the threshing and cleaning system is arranged at the end of the threshing and cleaning system end and close to the grain storage assembly;

The power assembly includes an engine and a gearbox; the engine is fixed on the chassis of the frame between the cab and the grain storage assembly; the engine is suitable for driving the cleaning transmission system; the cleaning transmission The system is arranged on the threshing and cleaning system and is located on the side facing away from the grain storage assembly.

The double-screw threshing conveying system includes:

Two concave plate screens are arranged on the frame in parallel and at intervals in the horizontal direction; the inner screen surface of any one of the concave plate screens is in the shape of an arc; the two concave plate screens are located on the same side of the frame One end of the opening is provided with a transition port along the radial direction; the two transition ports are facing each other and communicate with each other;

a transition plate screen, laid between the two concave plate screens and connecting the two transition ports;

One of the concave plate screen is located at the opposite end of the transition port and away from the other end of the transition port to open a feeding port for crops;

Two cylinder covers, in one-to-one correspondence and buckled on the concave plate screen, form a hollow cylindrical installation cavity with the concave plate screen; any one of the cylinder covers is spaced from the wall surface of the installation cavity A number of guides are provided; the crops entering the installation cavity are adapted to be moved directionally around the axis; the guiding directions of the guides in the two cylinder covers are opposite;

Two rollers are respectively coaxially and rotatably arranged in the installation cavity; the rollers are respectively arranged with a gap between the corresponding inner screen surface and the end surface of the guide member; the working area of the rollers The length of the corresponding intaglio screen is the same; the length of the two intaglio screens is the same.

It also includes a limit adjustment structure, which is detachably arranged at the gap formed between the outer screen surfaces of the two concave plate screens and the transition plate screen.

The limit adjustment structure also includes:

The two adjusting pieces are in the shape of a circular arc as a whole, and are respectively fixed on the two concave plate screens on both sides of the gap; the two sides of the sealing plate are respectively fixed on the two adjusting pieces.

Any of the adjustment members includes:

an adjustment plate, the surface of which is in an arc shape matching the concave screen to which it is fixed; the surface of the adjustment plate is suitable for partially blocking the transition port;

Two mounting plates are bent along the adjusting plate and are respectively fixed on opposite sides of the adjusting plate; one of the mounting plates is suitable for being fixed on the concave screen, and the other is suitable for The sealing plate is fixedly connected.

The cross-section of the adjusting member is in the shape of a trough.

The screen surface of the transition plate screen is arranged tangentially to the inner screen surface of the concave plate screen that first contacts the crop.

The cylinder cover comprises a square mounting frame and a circular arc-shaped cover hingedly arranged with one side frame of the mounting frame; the mounting frame is suitable for being fixed on the edge of the concave screen by overlapping;

The cover body includes an arc-shaped top cover and side top plates blocked on both sides of the top cover; the guide pieces are arranged at intervals along the inner wall surface of the top cover, and guide pieces are formed between adjacent guide pieces aisle.

A plurality of toggle members are arranged at intervals along the axial direction of the drum on any one of the drums; all the toggle members have the same size; the distance from the end face of any of the toggle members to the axis of the drum forms the the rotation radius of the drum;

The height of the lowest point of the cylindrical surface formed by the rotation of the drum that contacts the crop later from the horizontal plane is greater than the height of the lowest point of the cylindrical surface formed by the rotation of the drum that first contacts the crop from the horizontal plane.

The threshing and cleaning system also includes a screening system; the screening system includes:

The vibrating screen has an upper screen area and a lower screen area; the screen frame of the vibrating screen has a funnel-shaped structure as a whole;

In the upper screen area, a corrugated plate, a lifting structure, at least one section of fish scale screen and a tail screen are arranged in sequence along the direction of crop movement;

A lower sieve is arranged in the lower sieve area corresponding to the fish scale sieve;

The front sealing structure is sealed and fixed at the front end of the corrugated plate;

The grain separation structure is arranged at the end of the lower screen, and is arranged between the grain collection area and the miscellaneous waste collection area;

The driving structure, fixed on the frame, is suitable for driving the vibrating screen to vibrate back and forth.

The lifting structure is a shaking screen; the shaking screen includes:

a mounting piece, which has a mounting surface and a mounting surface facing away from the mounting surface and arranged at an acute angle with the mounting surface; the mounting surface is fixed at the rear end of the corrugated plate;

The plurality of screen teeth extend along the opening direction of the angle formed by the mounting surface and the mounting surface, and one end is a fixed end, which is fixed on the mounting surface at intervals, and the other end is a free end, which is suspended.

Any one of the screen teeth is bent and arranged in a stepped shape; it is suitable for guiding crops to travel along the screen teeth from the fixed end located on the installation surface to the free end.

The front sealing structure includes:

A seal is fixed between the front material plate at the front end of the corrugated plate and the fan casing below the front material plate; the width of the seal is not less than that between the front material plate and the fan casing The width of the screen surface of the vibrating screen;

The opposite sides located in the width direction of the sealing element correspond to the left and right side walls of the frame respectively and are arranged with a gap.

The front sealing structure also includes:

The first shutter is arranged between the front material plate and the screen front plate of the vibrating screen; the first shutter is a flexible member, which has a stretch margin for the vibrating screen to vibrate back and forth.

The front sealing structure also includes:

One end of the second shutter is fixed on the end of the front material plate facing the vibrating screen, and the other end is a free end, and hangs down naturally to the screen surface of the vibrating screen.

The grain separation structure includes:

a spacer, arranged between the grain collection area and the miscellaneous waste collection area, and fixed on the screen frame; the isolation surface of the spacer extends from one side of the grain collection area to the top of the miscellaneous waste collection area;

A front curtain, which extends in the same direction as the isolation surface, one end is fixed on the isolation piece, and the other end is placed on the grain bottom shell in the grain collection area; it is suitable for shielding the isolation piece and the grains An opening formed between the bottom shells communicates the grain collection area and the miscellaneous waste collection area.

The grain separation structure also includes:

The rear curtain is arranged at an angle to the isolation surface, and one end is fixed on the spacer, and the other end is placed on the miscellaneous bottom case in the miscellaneous waste collection area; it is suitable for shielding the spacer and the An opening formed between the miscellaneous residue bottom shells and communicates the miscellaneous residue collecting area and the grain collecting area.

The drive structure includes:

Two bearing seats are respectively fixed on the side walls of the two supporting beams symmetrically and vertically arranged at the rear end of the frame; an outer spherical bearing is installed in any of the bearing seats;

a transmission shaft, the two ends of which are respectively fixed in the outer spherical bearing;

Two eccentric bearings are respectively fixed on both ends of the transmission shaft in a mirror image;

One end of the screen frame is fixed on the two eccentric bearings, and the other end is set on the frame through a reciprocating guide structure;

The driving wheel, fixed on one end of the transmission shaft, is suitable for being driven by the driver of the harvester and driving the transmission shaft to rotate.

The reciprocating guide structure includes:

two orbital bearings, symmetrically arranged on both sides of the screen frame and one end away from the transmission shaft;

Two vibrating rails are symmetrically arranged on the racks on both sides of the screen frame; the guiding direction of the vibrating rails is arranged at an angle with the horizontal plane; the rail bearings are arranged in a one-to-one correspondence and slidably on the within the track.

The threshing and cleaning system also includes an air supply system; the air supply system includes:

a fan, which has an air outlet;

An air supply channel is formed between the bottom shell at the lower part of the harvester and the upper threshing system;

The bottom casing includes a fan casing, a grain bottom casing, a miscellaneous bottom casing and a screen frame of a vibrating screen that are continuously arranged in sequence;

A tail cover is installed at the tail end of the threshing system far from the fan; a discharge port is formed between the tail cover and the screen frame; the wind is directed towards the discharge opening;

In the vertical direction, the height of the discharge port is higher than the height of the air outlet; the air outlet is inclined toward the discharge port; the fan housing, the grain bottom shell, the miscellaneous bottom shell and the screen The frame is inclined and gradually increased from the side of the air outlet toward the discharge port;

the fan casing has a cylindrical installation cavity;

Both ends of the fan casing in the axial direction are respectively provided with first air inlets communicating with the outside world;

A second air inlet is provided on the side wall of the fan casing opposite to the air outlet along its circumferential direction; in the axial direction of the fan casing, the second air inlet is located in the fan the middle position of the shell.

The cleaning transmission system includes:

an output pulley connected to the engine drive; the output pulley is divided into three-way transmission output; the three-way transmission is distributed on the same side wall surface of the frame;

The first transmission includes an output pulley, a first threshing pulley and a second threshing pulley;

The second transmission includes output pulley and chopper pulley;

The third transmission includes output pulley, fan pulley, grain pulley, miscellaneous pulley and screening pulley; all pulleys are connected by transmission.

Also includes:

a first transition wheel, fixed on the frame and arranged between the output pulley and the shredder pulley; the output pulley is in driving connection with the first transition wheel; the first transition wheel The transition wheel is drivingly connected with the chopper pulley.

Also includes:

The second transition pulley is fixed on the frame and arranged in the third transmission; the output pulley, the fan pulley, the grain pulley, the second transition pulley and the miscellaneous pulley are connected by transmission ; The second transition wheel is in driving connection with the screening pulley.

The three-way transmission adopts the V-belt transmission connection.

The first threshing pulley and the second threshing pulley are connected by a connecting belt drive.

It also includes a plurality of tensioning components, which are distributed between the adjacent pulleys and are suitable for tensioning the V-belt between the adjacent pulleys.

Any of the tensioning assemblies includes:

One end of the tensioning arm is hingedly arranged on the frame, and the other end is a free end;

The tensioning wheel is fixed on the free end of the tensioning arm;

a pull rod, fixed on the frame;

A tension spring is arranged between the tension rod and the tension arm;

The tensioning pulley is tensioned against the V-belt by the biasing force of the tension spring.

The grain auger is arranged on the frame, and one end is fixed with the grain pulley, and the other end is connected with the granary auger; a direction-changing gear box is arranged between the grain auger and the granary auger.

The miscellaneous auger is arranged on the frame, and one end is fixed with the miscellaneous pulley, and the other end is connected with the complex auger; a direction-changing gear box is arranged between the miscellaneous auger and the complex auger.

The distribution structure includes:

The grass dividing board is fixed on the upper edge of the grass discharge opening;

The board surface of the grass dividing board is gradually expanded from the grass discharge port toward the end away from the grass discharge port;

A plurality of first grass guides are arranged on the lower surface of the grass dividing board at intervals along a direction parallel to the edge of the grass discharge opening; the first grass guiding boards are perpendicular to the grass dividing board and are The centerlines of the grass dividing boards are set at an angle.

The first grass guide plate is arranged at one end close to the grass discharge opening; further comprising:

A plurality of second grass guides are arranged on the lower surface of the grass dividing board at intervals along the direction parallel to the edge of the grass discharge opening, and are located at one end away from the grass discharge opening; the second grass guides is perpendicular to the grass dividing board and is arranged at an angle with the center line of the grass dividing board;

The number of the second grass guides is greater than the number of the first grass guides.

The technical solution of the present application has the following advantages:

1. In the combine harvester provided by this application, the cab and the crop conveying structure are arranged side by side at the front of the frame, the threshing and cleaning system and the grain storage component are arranged side by side at the rear of the frame, and the crop conveying structure is connected to the feeding of the threshing and cleaning system. The feeding port is set at the front end of the threshing and cleaning system and close to the grain storage component. The distribution structure in the threshing and cleaning system is set at the end of the threshing and cleaning system and close to the grain storage component. The engine is fixed on the chassis of the frame between the cab and the grain storage assembly, the engine is suitable for driving the cleaning transmission system, and the cleaning transmission system is arranged on the threshing cleaning system and located on the side facing away from the grain storage assembly. The feeding port is set in the middle of the frame, so that the connection port between the connected crop conveying structure and the header is located near the middle of the header, and the two sides of the header feed crops more evenly to the connection port; at the same time, the distribution structure is close to the The grain storage component is set up, and the double-screw threshing conveying system is used to make the crops enter from the middle of the front end of the harvester and spread out from the middle part of the rear end, so as to ensure the stability of the center of gravity of the combine harvester. The cleaning transmission system is set on the outside of the threshing system, with centralized transmission, which is convenient for installation and debugging. The whole machine has a compact structure and occupies a small space. It always maintains a stable center of gravity during empty machine operation and harvesting operations, with high mobility and remarkable work efficiency.

2. The combine harvester provided by this application has two threshing spaces arranged horizontally and at intervals in the forward and backward directions of the harvester. The threshing space is a hollow cylindrical installation cavity surrounded by a concave plate screen and a cylinder cover. Install the rollers. Guides are arranged at intervals on the inner wall of the cylinder cover to guide the crops entering the threshing space to move directionally around the axis. When the drum rotates, the crops are driven to move, and are guided by the guides from the first threshing space to the second threshing space. The working area of the threshing space is the same length, so that the crop threshing path passes the length of both drums and can be fully threshed. The two threshing spaces are arranged at horizontal intervals, which makes the structure on the rack more compact. The length of the two threshing working areas is the same, and a long enough threshing path can be ensured, which fully guarantees the overall mobility of the harvester and fully guarantees the threshing. Effect.

3. The combine harvester provided by this application is provided with a limit adjustment structure at the gap formed between the outer screen surfaces of the two concave plate screens and the transition screen plate, and the limit adjustment structure is detachably fixed on the concave plates on both sides. sieve. When the limit adjustment structure is not set, some crops only pass through the first concave plate screen and then fall into the lower vibrating screen from the gap, and directly enter the subsequent process. When the limit adjustment structure is set, the crops pass through the transition from the first concave plate screen The plate sieve enters the second concave plate sieve and passes through a complete "ji"-shaped trend, the transmission path is longer, and the threshing and screening effect is better.

4. In the combine harvester provided by this application, the vibrating screen has an upper screen area and a lower screen area. In the upper screen area, a lifting structure is arranged at the tail end of the corrugated plate to improve the drop between the corrugated plate and the fish scale screen, and cooperate with the tail screen at the tail end. , forming two stages of ascension, fully shaking the agglomerated crops and loosening them, so as to avoid the crop stalks entrained with the grains and discharged, causing waste. At the same time, a front sealing structure is set at the front end of the corrugated plate to prevent the seeds from being thrown out by the vibrating screen. A grain separation structure is set between the grain collection area and the miscellaneous waste collection area under the vibrating screen to effectively separate clean grains from straw and other miscellaneous wastes, so that the collection of grains is more complete and clean, avoiding waste and improving screening efficiency.

5. In the combine harvester provided by this application, the lifting structure is a shaking screen, including a mounting piece and a plurality of screen teeth. The mounting piece has a mounting surface and a mounting surface facing away from the mounting surface and at an acute angle with the mounting surface. The teeth extend along the opening direction of the angle formed between the mounting surface and the mounting surface, and one end is a fixed end, which is fixed on the mounting surface at intervals, and the other end is a free end, which is suspended in the air. When the vibrating screen as a whole vibrates back and forth, the crops It slides from the corrugated plate to the shaking screen, and is shaken and raised by the suspended screen teeth, and then falls on the fish scale screen to shake and loosen the crops. In addition, the shaker screen can be set on the corrugated plate according to different inclination angles according to different needs, making full use of the space and making the screening system more compact while ensuring the screening effect.

6. In the combine harvester provided by this application, a seal is fixed between the front material plate below the threshing drum of the harvester for guiding the grains to slide down and the fan casing under the front material plate, and the width of the seal is not smaller than the front material plate. The width of the screen surface of the vibrating screen between the material plate and the fan casing, and the opposite sides located in the width direction of the seal and the left and right side walls of the frame are respectively corresponding and arranged with a gap. The upper front material plate, the lower fan casing and the opening connected to the vibrating screen surrounded by the left and right side walls of the frame are blocked by the seal, and the crop grains are blocked by the seal and fall back along the fan casing Go to the grain collection area under the vibrating screen to avoid crop grains flying out of this opening and falling to the ground, causing waste.

7. In the combine harvester provided by this application, the grain separation structure includes a spacer and a front curtain, which is arranged between the grain collection area and the miscellaneous waste collection area, and is fixed on the shell of the vibrating screen. One side of the grain collection area extends to the top of the miscellaneous waste collection area. The front curtain extends in the same direction as the isolation surface, one end is fixed on the spacer, and the other end is placed on the bottom shell of the grain in the grain collection area to block the spacer and the seeds. The opening formed between the bottom shell that connects the grain collection area and the miscellaneous waste collection area allows the fan to blow air along the front curtain and the spacer and blow out from the opening formed between the spacer and the lower screen to prevent the return air from entering the miscellaneous waste. The grain collection area pollutes the grains of the granary, and at the same time, it can increase the air volume blown at the end of the lower screen and improve the effect of wind selection.

8. The combine harvester provided by this application forms an air supply channel between the bottom shell at the lower part of the harvester and the upper threshing system, and the bottom shell includes a fan shell, a grain bottom shell, a miscellaneous bottom shell and The screen frame of the vibrating screen. A tail cover is installed at the rear end of the threshing system away from the fan, a discharge port is formed between the tail cover and the screen frame, and a blocking member is arranged between the tail cover and the vibrating screen to guide the supply air toward the discharge port.

In the vertical direction, the height of the discharge port is higher than the height of the air outlet, the air outlet is inclined toward the discharge port, and the fan housing, grain bottom shell, miscellaneous bottom shell and screen frame are inclined from the air outlet side toward the discharge port And gradually increase the setting, the two ends of the fan casing are respectively provided with first air inlets that communicate with the outside world, and the side wall opposite to the air outlet in the middle of the fan casing is provided with a second air inlet along its circumferential direction, passing through the fan casing. Three air inlets evenly distributed on the body supply air, so that the air volume in the fan is uniform and stable. The air outlet is gradually increased towards the discharge port to improve the circulation, and the baffle is installed on the tail cover to guide the supply air toward the discharge port, so as to avoid the return air from entering the threshing system and the screening system, which will affect the cleanliness of crops. The air supply system has a compact and stable structure, sufficient air volume, and no return air effect, which greatly improves the air selection efficiency.

9. In the combine harvester provided by this application, the output pulley is divided into three-way transmission output, and the three-way transmission is distributed on the same side wall surface of the frame. The first drive includes output pulley, first threshing pulley and second threshing pulley, the second drive includes output pulley and chopper pulley, and the third drive includes output pulley, fan pulley, grain Pulleys, surplus pulleys and screening pulleys, all drive connections between pulleys. The power input of the threshing mechanism, the shredding mechanism, the wind sorting mechanism, the grain warehousing mechanism, the complex removal mechanism and the screening mechanism of the harvester are all arranged on the same side of the frame, which makes the transmission system of the whole machine compact. All drive pulleys are set on the same side for easy installation, control and debugging. And the power input of each mechanism is directly provided by the output pulley, which avoids the transmission loss caused by the intermediate transmission, reduces the workload of the mechanism providing the intermediate transmission, and improves the transmission efficiency and service life of the whole machine.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram 1 of the combine harvester in the embodiment of the application;

FIG. 2 is a second structural schematic diagram of the combine harvester in the embodiment of the application;

Fig. 3 is the first structural schematic diagram of the concave plate screen in the embodiment of the application;

4 is a schematic diagram of the assembly structure of the concave plate screen in the embodiment of the application;

5 is a schematic diagram of the assembly structure of the concave plate screen, the cylinder cover and the drum in the embodiment of the application;

Fig. 6 is the structural representation 2 of the concave plate screen in the embodiment of the application;

Fig. 7 is the structural schematic diagram three of the concave plate screen in the embodiment of the application;

8 is a schematic diagram of the exploded structure of the assembly of the concave plate screen and the cylinder cover in the embodiment of the application;

9 is a schematic structural diagram of a double drum in an embodiment of the application;

10 is a schematic diagram of the trend of crops in the double-drum structure in the embodiment of the application;

11 is a schematic structural diagram of a first drum in an embodiment of the application;

12 is a schematic structural diagram of a second drum in an embodiment of the application;

13 is a schematic structural diagram of a cylinder cover in an embodiment of the application;

14 is a schematic diagram of the distribution structure of the grass guides in the embodiment of the application;

15 is a schematic structural diagram of a screening system in an embodiment of the present application;

16 is a schematic structural diagram of a shaking screen in an embodiment of the application;

17 is a schematic structural diagram of a mounting plate in an embodiment of the application;

18 is a schematic structural diagram of a screen fork group in an embodiment of the application;

19 is a schematic diagram of the assembly structure of the shaking screen in the embodiment of the application;

20 is a schematic diagram of the installation structure of the sealing plate in the embodiment of the application;

21 is a schematic structural diagram of a front sealing structure in an embodiment of the application;

Figure 22 is a schematic structural diagram of the grain separation structure in the embodiment of the application;

23 is a schematic structural diagram of a spacer in an embodiment of the application;

Figure 24 is a schematic structural diagram 1 of the vibrating screen drive in the embodiment of the application;

Fig. 25 is the second structural schematic diagram of the vibrating screen drive in the embodiment of the application;

26 is a schematic structural diagram of a track bearing on a vibrating screen in an embodiment of the application;

27 is a schematic structural diagram of a vibrating guide rail in an embodiment of the application;

28 is a schematic structural diagram of a linkage in an embodiment of the application;

29 is a schematic structural diagram 1 of an air supply system in an embodiment of the application;

FIG. 30 is a second structural schematic diagram of the air supply system in the embodiment of the application;

31 is a schematic structural diagram of a flow blocking member in an embodiment of the application;

32 is a schematic structural diagram of a fan casing in an embodiment of the application;

33 is a schematic diagram of the installation structure of the windshield in the embodiment of the application;

34 is a schematic cross-sectional view of a fan structure in an embodiment of the application;

35 is a schematic structural diagram of a fan shaft in an embodiment of the application;

36 is a perspective view of a fan structure in an embodiment of the application;

37 is a schematic structural diagram 1 of a cleaning transmission system in an embodiment of the application;

Figure 38 is a schematic structural diagram of the tensioning assembly at S in Figure 37;

FIG. 39 is a second structural schematic diagram of the cleaning transmission system in the embodiment of the application;

40 is a schematic structural diagram of a chopper in an embodiment of the application;

41 is a schematic structural diagram of a fixed knife seat in an embodiment of the application;

42 is a schematic structural diagram of a moving knife roller in an embodiment of the application;

43 is a schematic diagram of the distribution structure of the movable knife seat after the movable knife roller is unfolded along its generatrix in the embodiment of the application;

FIG. 44 is a schematic structural diagram of the movable knife holder in the embodiment of the application;

45 is a schematic diagram of the assembly structure of the movable blade in the embodiment of the application;

46 is a schematic structural diagram of an anti-wrap ring in an embodiment of the application;

47 is a schematic diagram of the assembly structure of the distribution structure in the embodiment of the application;

FIG. 48 is a schematic structural diagram of a grass dividing board in an embodiment of the present application.

Description of reference numbers:

H, vibrating screen; M, grain collection area; N, miscellaneous waste collection area; W, operation area; D, grass discharge area; K, anti-winding ring;

1. Frame; 2. Frame; 3. Traveling mechanism; 41. Header; 42. Crop conveying structure; 51. Engine; 52. Gearbox; 61. Granary; 62. Grain unloading tank; 7. Cab; 8. Dust cover;

2a, the first roller; 3a, the second roller; 4a, the roller shaft; 5a, the disc; 51a, the adjustment hole; 52a, the limit groove; 53a, the disc seat; 6a, the threshing gear rod; ; 8a, connecting plate; 9a, anti-winding ring;

11b, assembly beam; 110b, assembly hole; 111b, positioning pin; 12b, support beam; 2b, first concave plate screen; 21b, feeding port; 3b, second concave plate screen; 4b, side guard plate; 41b, steel wire 5b, connecting beam; 50b, second installation hole; 501b, positioning hole; 51b, grid bar; 6b, transition port; 7b, transition plate screen; 8b, reinforcing rib; 9b, sealing plate; 91b, adjusting plate ; 92b, mounting plate; 10b, notch;

2c, the first cylinder cover; 21c, the cover body; 211c, the top cover; 212c, the side top plate; 22c, the mounting frame; 23c, the handle; 24c, the grass guide; 3c, the second cylinder cover; 9c, the fastener; 91c, handle part; 92c, threaded part; 93c, washer;

1d, installation plate; 11d, installation surface; 12d, assembly surface; 2d, screen teeth; 3d, screen fork unit; 4d, screen fork group; 5d, pressure plate; 6d, corrugated plate; 7d, fish scale screen; 8d, lower screen ;

1e, dividing plate; 11e, flanging; 2e, connecting plate; 3e, front curtain; 4e, rear curtain; 5e, grain bottom shell; 6e, miscellaneous bottom shell;

1f, sealing plate; 2f, front material plate; 3f, fan housing; 31f, first air inlet; 32f, second air inlet; 33f, air outlet; 4f, visible parts; 5f, screen front plate; 6f , the first shutter; 7f, the second shutter; 8f, the wing nut;

2g, bearing seat; 3g, drive shaft; 4g, eccentric bearing; 5g, driving wheel; 61g, track bearing; 62g, vibration track; 7g, linkage; 71g, ring sleeve; 72g, linkage plate; 8g, counterweight ; 9g, protective plate;

1h, screen frame; 11h, rear slide plate; 12h, adjusting plate; 2h, tail screen; 21h, mounting seat; 22h, tail screen;

1i, fan shaft; 11i, flat groove; 2i, fan blade; 3i, fan blade bracket; 31i, installation section; 32i, fixed section; 4i, reinforcing plate; 51i, first windshield; 52i, second windshield plate;

1j, rear sealing plate; 2j, tail cover; 3j, spoiler; 31j, threshing sealing plate; 32j, tail cover sealing plate; 41j, upper air deflector; 42j, lower air deflector; 5j, discharge outlet;

1k, ring plate; 11k, bottom plate; 12k, side plate; 2k, card plate; 3k, slot; 4k, troubleshooting slot; 5k, assembly hole;

1p, grass divider; 11p, extension; 2p, first grass guide; 3p, second grass guide; 10p, grass discharge;

1r, movable knife roller; 2r, movable blade; 3r, fixed knife seat; 4r, fixed blade; 5r, movable knife seat; 10r, left side wall; 11r, right side wall;

1s, output pulley; 10s, intermediate drive shaft; 11s, input pulley; 2s, first threshing pulley; 3s, second threshing pulley; 4s, chopper pulley; 51s, fan pulley; 52s, Grain pulley; 521s, grain auger; 522s, granary auger; 53s, miscellaneous surplus pulley; 531s, miscellaneous auger; 532s, complex auger; 6s, screening pulley; 71s, first transition wheel; 72s, second transition wheel; 81s, tensioning arm; 82s, tensioning wheel; 83s, tie rod; 84s, tension spring; 9s, changing direction gearbox.

Detailed ways

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict with each other.

Example 1

This embodiment provides a combine harvester, as shown in FIG. 1 , including a frame 2 , a traveling mechanism 3 is arranged below the chassis of the frame 2 , and a power assembly, a harvesting assembly, a cab 7 , and a threshing unit are arranged above the chassis of the frame 2 Cleaning system, cleaning transmission system and grain storage components.

The harvesting assembly includes a header 41 and a crop conveying structure 42 , and the cab 7 and the crop conveying structure 42 are arranged side by side at the front of the frame 2 . The threshing and cleaning system includes a double-screw threshing conveying system, which has a double-shaped threshing direction. The threshing and cleaning system and the grain storage component are arranged side by side at the rear of the frame 1, and the crop conveying structure 42 is connected to the feeding port of the threshing and cleaning system. The distributing structure in the threshing and cleaning system is arranged at the end of the threshing and cleaning system and close to the grain storage component. The power assembly includes an engine 51 and a gearbox 52. The gearbox 52 is arranged at the front of the frame 2 and below the crop conveying structure 42. The engine 51 is fixed on the chassis of the frame 2 between the cab 7 and the grain storage assembly. 51 is suitable for driving the cleaning transmission system, and the cleaning transmission system is arranged on the threshing and cleaning system and is located on the side facing away from the grain storage assembly. The feeding port is set at the middle position of the frame 2, so that the connecting port between the crop conveying structure 42 and the header 41 connected with it is located at the position near the middle of the header 41, and the header 41 feeds crops more evenly; at the same time, the distribution structure is close to The grain storage component is set up, and the double-screw threshing conveying system is used to make the crops enter from the middle of the front end of the harvester and spread out from the middle part of the rear end, so as to ensure the stability of the center of gravity of the combine harvester. The cleaning transmission system is set on the outside of the threshing system, with centralized transmission, which is convenient for installation and debugging. The whole machine has a compact structure and occupies a small space. It always maintains a stable center of gravity during empty machine operation and harvesting operations, with high mobility and remarkable work efficiency.

As shown in FIG. 2, the grain storage assembly includes a granary 61 and a grain unloading cylinder 62. A lifting auger is arranged between the granary 61 and the threshing and cleaning system. The clean grains from the threshing and cleaning system are transported into the granary 61 through the lifting auger. In this embodiment, the lifting auger is located between the granary 61 and the threshing and cleaning system. The grain unloading drum 62 is erected above the grain bin 61 and the threshing and cleaning system, and is fixed on the threshing and cleaning system. As shown in FIG. 2 , a dust cover 8 is provided on the water tank located outside the cab 7 .

In this embodiment, the threshing and cleaning system includes a double-screw threshing and conveying system, a screening system and an air supply system. As shown in FIG. 3 , the double-screw threshing and conveying system includes two threshing machines arranged horizontally and at intervals in the forward and backward directions of the harvester. The threshing space is a hollow cylindrical installation cavity enclosed by a concave plate screen and a cylinder cover, and a drum is installed in each installation cavity. Guides are arranged at intervals on the inner wall of the cylinder cover to guide the crops entering the threshing space to move directionally around the axis. When the drum rotates, the crops are driven to move, and are guided by the guides from the first threshing space to the second threshing space. The working area of the threshing space is the same length, so that the crop threshing path passes the length of both drums and can be fully threshed. The two threshing spaces are arranged at horizontal intervals, which makes the structure on the rack more compact. The length of the two threshing work areas is the same, and a long enough threshing path can be ensured, which fully guarantees the overall mobility of the harvester and fully guarantees the threshing. Effect.

As shown in Fig. 4, the two concave plate screens are respectively the first concave plate screen 2b provided with the feeding port 21b and the second concave plate screen 3b arranged adjacent to the first concave plate screen 2b in the direction of crop transmission. The concave plate screen 2b and the second concave plate screen 3b have the same length, that is, the length of the screening area is the same. The inner screen surface of each concave plate screen is in the shape of a circular arc, and the axes of the two concave plate screens are parallel to each other, and are fixed on the frame 1 at intervals along the horizontal direction.

As shown in FIG. 3 , each concave panel screen includes two side shields 4b, two connecting beams 5b, a plurality of grid bars 51b, a plurality of steel wires 41b and a plurality of reinforcing bars 8b. The two side shields 4b are arc-shaped respectively, the side shields 4b are coaxial and oppositely arranged, the two ends of the two side shields 4b are welded and fixed together by the connecting beam 5b, and the two side shields 4b are An installation space is enclosed between the two connecting beams 5b. In this embodiment, the grid bars 51b are arranged in parallel with the connecting beams 5b and are fixed across the two side shields 4b. Radial distribution, that is, the plane where each grid bar 51b is located intersects on the axis of the concave screen, and the center of the arc where the side shield 4b is located is located on the axis. Each grid bar 51b has a plurality of through holes evenly spaced. The steel wire 41b is arranged in parallel with the side shield 4b, and passes through the through holes on each grid bar 51b in sequence. Both ends of the steel wire 41b are respectively fixed on the connecting beam. 5b or grid bar 51b. All the grid bars 51b and the steel wires 41b intersect each other to form a plurality of grid units, and all the grid units together form a grid-like screen surface. In this embodiment, the reinforcing ribs 8b are arranged parallel to the side shields 4b, and are fixed at intervals on the outer screen surface. The grid bars 51b are welded and fixed to the side shields 4b on both sides, and the reinforcing rib 8b and all the grid bars 51b are also fixed by welding.

In this embodiment, the separation wrapping angles of the first concave plate screen 2b and the second concave plate screen 3b are both 180 degrees, that is, the side guard plate 4b is in a semicircular arc shape as a whole. When the separation angle is greater than 180 degrees, the upper space of the concave plate screen is wasted, and the upper part is curved, and the grains are thrown out of the concave plate screen from the upper part, and may fall back into the concave plate screen when falling, which affects the cleaning effect. When the degree is less than 180 degrees, the area of the screen surface is reduced, which also affects the cleaning effect.

In this embodiment, the area of the grid cells in the first concave screen 2b is smaller than the area of the grid cells in the second concave screen 3b, so that only crop grains pass through the first concave screen 2b, and the second intaglio screen It is suitable for passing through the grains and other small debris, so as to avoid the grains being entrained by the debris and discharged from the grass discharge port, causing losses. Specifically, when the distance between two adjacent grid bars 51b in the two concave plate screens is the same, the distance between two adjacent steel wires 41b in the second concave plate screen 3b is greater than that in the first concave plate screen 2b The distance between two adjacent steel wires 41b; or, when the distance between two adjacent steel wires 41b in the two concave plate screens is the same, then the two adjacent grid bars 51b in the second concave plate screen 3b The distance between them is greater than the distance between two adjacent grid bars 51b in the first concave plate screen 2b; or the distance between the adjacent grid bars 51b and the adjacent steel wires 41b in the second concave plate screen 3b Both are larger than the spacing between adjacent grid bars 51b and adjacent steel wires 41b in the first concave plate screen 2b. Of course, the steel wires 41b in each concave plate screen can be drawn out at intervals as required, so as to increase the area of the grid unit.

As shown in FIG. 3 , transition ports 6b are respectively provided on the ends of the two concave plate screens on the same side of the frame along the radial direction, and the two transition ports 6b are arranged facing each other. The transition plate screen 7b is laid between the two transition openings 6b. The transition plate screen 7b includes a screen frame, the screen frame is in a square structure, and the grid bars 51b are arranged in the screen frame at uniform intervals. Similarly, any grid bar 51b A plurality of through holes are opened at uniform intervals on the top, and the steel wires 41b pass through the through holes on the grid bars 51b in turn in the longitudinal direction. Wherein, the width direction of the square screen frame is horizontal, and the length direction is vertical. The feeding port 21b is arranged on the side of the first concave screen 2b opposite to the transition port 6b and away from the transition port 6b.

As shown in FIG. 4, three assembling beams 11b are arranged on the frame 1 at intervals, and the connecting beams 5b on both sides of the first concave screen 2b are overlapped and fixed between the first and second two assembling beams 11b. Similarly, The connecting beams 5b on both sides of the second intaglio screen are overlapped and fixed between the second and third two assembling beams 11b. The transition port 6b is opened close to one side of the frame 1 . The structural design makes the layout of the two concave plate screens on the harvester frame 1 compact, and at the same time, it can improve the path of crops passing through the concave plate screen threshing and screening, and greatly improve the overall mobility and threshing effect of the harvester.

A hollow cylindrical installation cavity is enclosed between the cylinder cover and the corresponding concave plate screen, and the installation cavity forms a threshing space. As shown in FIG. 5 , a first threshing space is enclosed between the first cylinder cover 2c and the first concave plate screen 2b, the first drum 2a is installed in the first threshing space, and the first concave plate screen 2b and the first drum The end faces of the toggle teeth of 2a are arranged in a gap. A second threshing space is formed between the second cylinder cover 3c and the second concave plate screen 3b, and the second drum 3a is installed in the second threshing space. At the same time, the toggle teeth of the second concave plate screen 3b and the second drum 3a There is a gap between the end faces. The transition port 6b communicates with the first threshing space and the second threshing space, and the crops enter the second threshing space from the first threshing space through the transition plate screen 7b.

As shown in Figure 6, a limit adjustment structure is provided at the gap 10b formed between the outer screen surfaces of the two concave plate screens and the transition screen plate, and the limit adjustment structure is detachably fixed to the first concave plate screen on both sides. 2b and the second concave plate screen 3b. When the limit adjustment structure is not provided, part of the crops only pass through the first concave plate screen 2b and then fall into the lower vibrating screen from the gap 10b, and directly enter the subsequent process. 2b enters the second concave plate sieve 3b through the transition plate screen 7b and passes through the complete "ji"-shaped trend, the transmission path is longer, and the threshing and screening effect is better.

In this embodiment, the limit adjustment structure includes a sealing plate 9b, and the shape of the sealing plate 9b matches the shape of the notch 10b. Further, it also includes an adjustment member connecting the sealing plate 9b and the two concave screen screens. As shown in Figures 6 and 7, the adjustment member includes an adjustment plate 91b and two mounting plates 92b fixed on both sides of the adjustment plate 91b. The plate surface of the plate 91b is in the shape of an arc that matches the concave plate screen to which it is fixed. The two mounting plates 92b are bent along the adjusting plate 91b and are respectively fixed on the opposite sides of the adjusting plate 91b. One mounting plate 92b is used for fixing the connecting recess. The plate screen, another mounting plate 92b is used to fix and connect the sealing plate 9b. In this embodiment, the cross-section of the adjusting member is indented, and the adjusting plate 91b and the mounting plates 92b on both sides are integrally formed. The plate surface of the adjustment plate 91b is suitable for partially blocking the transition port 6b, and the adjustment plate 91b can choose the size of the plate surface with different widths according to the needs, so as to realize the adjustment of the size of the transition port 6b passing through the crops, thereby partially extending the transmission path of the crops, Extend the threshing separation screening time of crops.

As shown in Fig. 8, the arc of the cross section of the concave plate screen and the cylinder cover are both 180 degrees. There are multiple sets of locking assemblies, any one of which is suitable for passing through the mounting frame 22c and the connecting beam 5b in sequence and being locked and fixed on the mounting beam 11b.

The connecting beam 5b is arranged horizontally and can be overlapped with the horizontal installation surface of the assembly beam 11b on the frame 1. During installation, only the concave screen is placed between the two assembly beams 11b, so that the connecting beam 5b It only needs to be mounted on the assembly beam 11b, and there is no need to carry out palm welding and fixation, which reduces a lot of manpower and material resources.

As shown in FIG. 8 , the mounting frame 22c is square, and the cover 21c is hinged on one side of the mounting frame 22c and is suitable for being fastened on the mounting frame 22c. The frame surface of the mounting frame 22c is suitable for overlapping with the surface of the connecting beam 5b, which is convenient for assembly.

As shown in FIG. 33 , the cover body 21c includes an arc-shaped top cover 211c and two side top plates 212c sealed on both sides of the top cover 211c. The arc of the top cover 211c is 180 degrees, and guides are evenly spaced on the inner wall surface of the top cover 211c. In this embodiment, the guides are grass guides 24c, and the grass guides 24c are arc-shaped along the arc of the top cover 211c. As shown in Fig. 34, the grass guide plate 24c is arranged at a certain angle with the axis of the cylinder cover, so as to guide the crops entering the threshing space in the same direction. And in order to satisfy the "ji"-shaped trend of crops between the two threshing spaces, as shown in Figure 34, in this embodiment, the grass guide plates 24c in the first cylinder cover 2c and the second cylinder cover 3c are assembled about the middle. The beams 11b are arranged axially symmetrically, that is, the guiding directions of the grass guide plates 24c in the two cylinder covers are opposite.

As shown in FIG. 8 again, the locking assembly includes a fastener 9c and a washer 93c. In this embodiment, the fastener 9c is made of hexagonal steel, and the fastener 9c includes a hexagonal handle The screw portion 92c below the portion 91c. Correspondingly, the assembling beam 11b is provided with assembling holes 110b which are threadedly matched with the threaded portion 92c, the installation frame 22c is provided with a plurality of first installation holes (not shown in the figure) at intervals along the frame, and a plurality of second installations are started at intervals on the connecting beam 5b. The hole 50b, the first mounting hole, the second mounting hole 50b and the mounting hole 110b are correspondingly arranged, and the fastener 9c passes through the first mounting hole and the second mounting hole 50b in sequence and is fixed in the mounting hole 110b, and the mounting frame 22c A washer 93c is provided between the fastener 9c and between the connecting beam 5b and the assembling beam 11b, and the washer 93c is coaxially sleeved on the threaded portion 92c of the fastener 9c. In this embodiment, the diameter of the corresponding first installation hole is smaller than the diameter of the second installation hole 50b, so as to correct the slight misalignment between the concave plate screen and the cylinder cover. Further, an inner thread may be set in the first installation hole to cooperate with the outer thread of the fastener 9c to increase the locking strength.

In order to improve the accuracy of installation, a positioning assembly is also provided. As shown in FIG. 8 , the positioning assembly includes at least one positioning pin 111b, which is disposed on the assembling beam 11b. In this embodiment, two ends of each assembly beam 11b are respectively provided with a positioning pin 111b, and the positioning pin 111b is cylindrical. The connecting beam 5b and the mounting frame 22c are respectively provided with positioning holes 501b, and the positioning holes 501b are suitable for being sleeved on the corresponding positioning pins 111b. The positioning holes 501b on the connecting beam 5b and the mounting frame 22c have the same diameter and are slightly larger than the diameters of the positioning pins 111b, so as to correct the slight misalignment of the first and second mounting holes 50b relative to the mounting holes 110b.

The concave plate screen and the cylinder cover are integrally assembled to the assembly beam 11b of the harvester frame 1 through the fastener 9c, the structure is simple, the installation operation is simple and easy, and manpower and material resources are saved.

As shown in Fig. 5 or Fig. 9, the axes of the two drums are parallel to each other and are arranged at intervals in the conveying direction of the crops. A plurality of toggles are arranged at intervals along the drum shaft 4a on any drum, and a working area W is formed between the two toggles at both ends of the drum. The lengths of the two working regions W and the corresponding concave screen are the same. In the embodiment, the lengths of the two concave plate screens are the same. As shown in Figure 30, the crops first enter the first drum 2a from the feeding port 21b, are rotated and threshed by the first drum 2a and are screwed into the second drum 3a located at the rear, and then rotated and threshed by the second drum 3a, and finally screwed. To the weeding area D and discharge the threshed straw, the crops spiral in the double-drum structure and are in a straight shape, the stroke length is the sum of the lengths of the two cylinders, the threshing stroke is long, and the threshing effect is obvious. One end of the two drums is flush and the overall axial direction is parallel, which does not occupy extra space, so that the overall structure of the combine harvester is compact.

The overall structure of the first drum 2a and the second drum 3a is the same, the difference is that a section of grass discharge area D is added at the end of the crop stroke of the second drum 3a, as shown in Figure 31 and Figure 32, any drum includes a drum shaft 4a, several Disc 5a and a plurality of threshing racks 6a. In this embodiment, three webs 5a are provided in the working area W of the first drum 2a and the second drum 3a, and one web 5a is provided in the drafting area D of the second roller 3a, and all webs 5a pass through the webs 5a The seats are fixed on the corresponding drum shafts 4a at even intervals.

The outer circumference of any one of the discs 5a is provided with a plurality of installation parts at intervals. In this embodiment, any installation part includes a limit groove 52a and several sets of adjustment holes 51a arranged on the outer circumference of the limit groove 52a. The limit groove 52a The groove shape matches with the threshing tooth bar 6a, and is suitable for embedding the threshing tooth bar 6a. The connecting rod is welded and fixed on the threshing toothed rod 6a, and the threshing toothed rod 6a and the web 5a are detachably connected together by a connecting plate 8a, and the connecting plate 8a is provided with a through hole corresponding to any set of adjustment holes 51a, The bolts pass through the corresponding adjustment holes 51a and the through holes on the connecting plate 8a to fix the threshing rack 6a on the web 5a, and are fixed in different adjustment holes 51a to realize the toggle on the threshing rack 6a angle adjustment.

As shown in FIG. 31 , in this embodiment, eight limit grooves 52a are provided on any one of the disks 5a, of which six limit grooves 52a are evenly spaced on the circumference of the disk 5a, and the other two limit grooves 52a As spare grooves, opposing grooves are provided on the outer circumference of the disk 5a. In this embodiment, six threshing tooth bars 6a are provided, which are respectively fixed in the six limit grooves 52a evenly distributed on the circumference of the web 5a, and each threshing tooth bar 6a is provided with a plurality of toggles at intervals. In the example, the toggle member is a cylindrical toggle tooth 7a. The toggle teeth 7a on the adjacent threshing gear rods 6a are spaced apart from each other in the axial direction of the drum to enhance the threshing effect.

All the toggle teeth 7a in the work area W have the same size. As shown in FIG. 5 , the toggle teeth 7a on the same drum have the same inclination angle with respect to the drum shaft 4a, forming a radial structure. The distance from the end face of any toggle tooth 7a to the axis of the drum forms the radius of rotation of the drum. When the drum rotates, the end surfaces of all the toggle teeth 7a together form a cylindrical surface. In this embodiment, as shown in FIG. 5 , the height of the lowest point of the cylindrical surface of the second roller 3a from the horizontal plane is greater than the height of the lowest point of the cylindrical surface of the first roller 2a from the horizontal plane. Further, the radius of rotation of the second roller 3a is smaller than the radius of rotation of the first roller 2a, while the height of the roller shaft 4a of the second roller 3a is higher than the height of the roller shaft 4a of the first roller 2a, and the second roller 3a and the The highest point of the rotating cylindrical surface of a drum 2a is at the same level. The structural design increases the distance between the drum that contacts the crop behind and the horizontal vibrating screen below, so that the debris falling from the drum that contacts the crop afterward to the vibrating screen can be sufficiently screened by wind blowing.

On the traveling path of the crops, as shown in Figures 31 and 32, the transition ends of the first drum 2a and the second drum 3a are respectively provided with anti-wrap rings 9a, that is, as shown in Figure 9, the first drum 2a is fixed on the One end of the drum shaft 4a of the right frame 1 is provided with an anti-winding ring 9a, and the second drum 3a is fixed on one end of the drum shaft 4a of the right frame 1, and an anti-winding ring 9a is provided to prevent crop straws from being wound on the drum shaft 4a Obstructing crop transport.

The working process of the double helical conveying system in the present embodiment is:

The crops enter the first threshing space from the feeding port 21b, and are stirred by the rotation of the toggle member of the drum. The crops are moved along the inner wall surface of the concave plate screen and the cylinder cover by centrifugal action, and are guided by the guide members on the cylinder cover. Do a spiral motion in the set direction. From the feeding port 21b along the first threshing space to the transition port, enter the second threshing space through the transition plate screen, thresh through the spiral guiding motion opposite to the first threshing space, and enter the grass discharging area D. The crops are threshed spirally in the two threshing spaces, and travel along the "several"-shaped path formed by the two threshing spaces. The traveling distance is long and the threshing is more sufficient.

As shown in Fig. 15, Fig. 19, Fig. 25 and Fig. 26, the screening system includes a vibrating screen H, a front sealing structure, a grain separating structure and a driving structure. The vibrating screen H has an upper screen area and a lower screen area 8d. In the upper screen area, a lifting structure is arranged at the tail end of the corrugated plate 6d to improve the drop between the corrugated plate 6d and the fish scale screen 7d. Duan Yangsheng fully shakes and loosens the agglomerated crops, so as to avoid the discharge of grains entrained by crop stalks, resulting in waste. At the same time, a front sealing structure is provided at the front end of the corrugated plate 6d to prevent the seeds from being thrown out by the vibrating screen H. A grain separation structure is set between the grain collection area M and the miscellaneous waste collection area N below the vibrating screen H, so as to effectively separate the clean grains from the miscellaneous wastes such as straw, so that the collection of grains is more complete and clean, avoiding waste and improving screening efficiency.

As shown in FIG. 15 or FIG. 19 , the screen frame 1h of the vibrating screen H has a funnel-shaped structure as a whole. In this embodiment, the lifting structure is a shaking screen, and the corrugated plate 6d and the shaking screen are sequentially arranged in the upper screen area along the moving direction of the crops. , at least a section of fish scale screen 7d and tail screen 2h, the corresponding fish scale screen 7d in the lower screen 8d area is provided with a lower screen 8d, in the present embodiment, the fish scale screen 7d is provided with two sections at intervals along the horizontal direction, and the fish scales in the two sections of fish scale screen 7d The sieves are arranged at an angle. For example, the fish scale screen pieces on the first stage fish scale screen 7d near the corrugated plate 6d are vertically upward, and the fish scale screen pieces on the second stage fish scale screen 7d near the tail screen 2h are inclined toward the tail screen 2h side. As shown in FIG. 1 , the tail screen 2h includes a mounting seat 21h and a plurality of tail screen pieces 2h. The mounting seat 21h and the fish scale screen pieces in the adjacent second stage fish scale screen 7d are inclined in the same direction and fixed on the screen frame 1h , a plurality of tail screen 2h pieces extend from the mounting seat 21h toward the obliquely upward direction in the direction of crop movement, and are fixed on the mounting seat 21h evenly spaced in the horizontal direction. The raised tail sieve 2h piece forms the second-stage lifting structure, which fully shakes off the loose crops.

As shown in Fig. 19, a rear sliding plate 11h is provided on the screen frame 1h located at one end of the tail screen 2h, and a regulating plate 12h is slidably arranged along the surface of the rear sliding plate 11h. There are three through holes (not shown in the figure) evenly spaced on the slide plate 11h, and three long waist holes are provided on the corresponding adjustment plate 12h. And fixed in the through hole of the rear sliding plate 11h, loosen the bolt, the adjusting plate 12h can slide up and down along the board surface of the rear sliding plate 11h to adjust the size of the tail crop outlet.

As shown in FIG. 16 , the shaking screen includes a mounting member and a plurality of screen teeth 2d. In this embodiment, the mounting member is a plate-like structure, that is, a mounting plate 1d. The mounting plate 1d has a mounting surface 12d and a mounting surface 11d that faces away from the mounting surface 12d and forms an acute angle with the mounting surface 12d. In this embodiment, as shown in FIG. The slope surface forms the mounting surface 11d for fixing the screen teeth 2d, and the lower bottom surface of the mounting plate 1d forms the mounting surface 12d, that is, as shown in FIG. It is fixed with the corrugated board 6d surface-to-surface. The screen teeth 2d extend along the opening direction of the angle formed between the mounting surface 12d and the mounting surface 11d, and one end is a fixed end, which is fixed on the mounting surface 11d at intervals, and the other end is a free end, which is suspended in the air. During the reciprocating vibration, the crops slide from the corrugated plate 6d to the shaking screen, are shaken and lifted by the suspended screen teeth 2d, and then fall to the fish scale screen 7d to realize the shaking and loosening of the crops. In addition, the shaking screen can be arranged on the corrugated plate 6d according to different inclination angles according to different needs, making full use of the space and making the screening system more compact while ensuring the screening effect.

As shown in FIG. 18 , in this embodiment, the screen teeth 2d have a cylindrical structure, of course, they can also be a sheet structure, depending on the specific situation. Any of the screen teeth 2d is bent and arranged in a stepped shape, and is suitable for guiding crops to travel along the screen teeth 2d from the fixed end located on the installation surface 11d to the free end. The fixed ends of the two screen teeth 2d are fixedly connected to form an indented screen fork unit 3d. The two screen fork units 3d are superimposed and arranged, and the indented vertical part of one fork unit is overlapped and fixed to the other screen fork unit. On one of the screen teeth 2d of 3d, a screen fork group 4d is formed, and a plurality of the screen fork groups 4d are evenly spaced on the installation surface 11d. As shown in FIG. 16 , all the screen fork groups 4d are fixed on the mounting surface 11d of the mounting plate 1d by pressing and welding through the pressing plate 5d. The suspended length of each sieve tooth 2d is long, on the one hand, it can increase the height of crops falling to the fish scale screen 7d, on the other hand, it can improve the elasticity of the sieve tooth 2d, so that when it moves with the vibrating screen, the shaking effect is more obvious.

In this embodiment, the mounting plate 1d, the screen teeth 2d and the pressing plate 5d are all made of aluminum alloy material, so as to reduce the weight of the entire screening system, thereby reducing the vibration inertia.

A front material plate 2f is arranged below the threshing drum for guiding crop grains to slide down. One end of the front material plate 2f is fixed to the frame 1 at the front end, and the plate surface is inclined downward from the front end of the frame 1 to the rear of the frame 1. The other end of the front material plate 2f is located above the vibrating screen H, and is located in the orthographic projection of the vibrating screen H on the horizontal plane.

As shown in FIG. 20 , the front sealing structure includes a sealing member, a first shutter 6f and a second shutter 7f. The seal is fixed between the front material plate 2f and the fan casing 3f below the front material plate 2f, and the width of the seal is not less than the screen surface width of the vibrating screen H between the front material plate 2f and the fan casing 3f, The opposite sides of the sealing member in the width direction are corresponding to the left and right side walls of the frame 1 respectively and are arranged with a gap. In this embodiment, the sealing member is a sealing plate 1f, the upper end of the sealing plate 1f is flanged, the flange is fixed on the lower surface of the front material plate 2f by bolts, and the lower end of the sealing plate 1f is fixed on the fan casing 3f by bolts. On the flanging, the gaps between the two sides of the sealing plate 1f and the left and right side walls of the rack 1 are filled and sealed with sealant.

In this embodiment, as shown in FIG. 20 or FIG. 21 , the sealing plate 1f is arranged in a bent section. 3f The outer wall surface forms a slope, which is convenient for guiding the crop grains leaking from the vibrating screen H. As shown in FIG. 20 , at least one observation port is provided in the vertical section of the sealing plate 1f. In this embodiment, two observation ports are provided, and each observation port is fixed by a wing nut 8f to a visual member 4f for observing vibration. Sieve H cannot sign the crop accumulation situation. The visual element 4f can be a transparent acrylic plate or a glass plate, preferably an acrylic plate, which is light in weight and not easily broken.

The front material plate 2f located above, the fan housing 3f located below, and the opening connected to the vibrating screen H surrounded by the left and right side walls of the frame 1 are blocked by the sealing plate 1f, and the crop grains are blocked by the sealing plate 1f. The fan housing 3f falls back to the grain collection area below the vibrating screen H to prevent crop grains from flying out of the opening and falling to the ground, causing waste.

Further, in order to prevent the accumulation of crop grains between the fan housing 3f and the sealing plate 1f, as shown in FIG. 21, a first shutter 6f is also provided, and one end of the first shutter 6f is fixed on the front material plate One end above the vibrating screen H, the other end of the first shutter 6f is fixed on the screen front plate 5f at the front end of the vibrating screen H, and the first shutter 6f and the screen surface of the vibrating screen H are arranged at a certain angle. The width of the first shielding member 6f is not less than the screen surface width of the vibrating screen H, and the first shielding member 6f is a flexible member. Avoid obstructing the motion of the shaker H.

As shown in Figure 21, the end of the front material plate 2f located at the first shutter 6f is also fixed with a second shutter 7f, and the other end of the second shutter 7f is a free end, which naturally hangs down to the screen surface of the vibrating screen H, and passes through the front and rear. The two shutters are provided for double-layer partition.

In this embodiment, both the first shutter 6f and the second shutter 7f are canvas.

As shown in FIG. 22, the grain dividing structure includes a spacer and a front curtain 3e. As shown in FIG. 15 , the spacer is arranged between the grain collection area M and the miscellaneous waste collection area N, and is fixed on the shell of the vibrating screen. The width of the spacers is the same as the width of the grain collection area M and the trash collection area N.

In this embodiment, as shown in FIG. 22, the spacer includes a dividing plate 1e and connecting plates 2e arranged on both sides of the dividing plate 1e. The width of the connecting plate 2e is the same as the width of the dividing plate 1e. The connecting plates 2e and The partition plates 1e are arranged in an indented structure. One end of the connecting plate 2e is fixed on the separating plate 1e, and the other end is fixed on the shell of the vibrating screen. The plate surface of the partition plate 1e extends upwards from the grain collection area M to the top of the miscellaneous waste collection area N. The two sides of the partition plate 1e form isolation surfaces, the front curtain 3e and the plate surface of the partition plate 1e extend in the same direction, one end is fixed on the partition plate 1e, and the other end is placed on the grain bottom in the grain collection area M On the shell 5e, to block the openings formed between the partition plate 1e and the grain bottom shell 5e to communicate with the grain collection area M and the miscellaneous waste collection area N, so that the fan blows along the front curtain 3e and the partition plate 1e and travels from the separation plate 1e. The opening formed between the upper end of the partition 1e and the lower sieve 8d is blown out, so as to prevent the return air from entering the grain collection area M with impurities, polluting the grains of the granary, and at the same time, it can increase the air volume blown at the end of the lower sieve 8d, and improve the effect of air selection. .

The front curtain 3e is a rubber curtain or a canvas curtain. In this embodiment, the front curtain 3e adopts a rubber curtain. As shown in FIG. 22 or FIG. 15 , the rubber curtain is partially erected on the seed bottom shell 5e, along the grains. The surface of the bottom shell 5e sags naturally, and the rubber-covered curtain has a certain adhesive force in surface-to-surface contact with the seed bottom shell 5e, which can better prevent the curtain from being blown up by the fan.

As shown in FIG. 22 , a rear curtain 4e is also provided in the waste collection area N. One end of the rear curtain 4e is fixed on the partition plate 1e, and the other end is placed on the waste bottom shell 6e in the waste collection area N. , to further prevent the front curtain 3e from being lifted by the return air, causing the miscellaneous residues to enter the grain collection area M. The width of the rear curtain 4e is smaller than the straight-line distance from its fixed point on the partition plate 1e to the auger in the miscellaneous waste collection area N, so as to avoid the entanglement of the rear curtain 4e when the auger rotates and cause failure. Similarly, the rear curtain 4e is a rubber curtain or a canvas curtain. In this embodiment, the rear curtain 4e adopts a rubber curtain. As shown in FIG. 22 or FIG. 15 , the rubber curtain is partially installed on the miscellaneous bottom shell 6e On the upper side, it sags naturally along the surface of the residual bottom shell 6e, and the rubber curtain is in contact with the residual bottom shell 6e surface-to-surface with a certain adhesive force, which can better prevent the curtain from being pulled along the inner wall of the residual bottom shell 6e. The whirling wind blew.

The partition plate 1e, the front curtain 3e and the rear curtain 4e form a herringbone isolation structure and are erected between the grain collection area M and the miscellaneous waste collection area N, and the grain collection area M and the miscellaneous waste collection area N are fully isolated to avoid crossing. pollution, to ensure the cleanliness of the grains in the warehouse.

As shown in FIG. 23 , one end of the grain collecting area M of the partition plate 1e is provided with a flange 11e facing the miscellaneous waste collecting area N, and the angle between the flange 11e and the surface of the partition plate 1e is an obtuse angle. The setting of the flange 11e is suitable for guiding the cyclone wind traveling along the inner wall surface of the residual bottom shell 6e and the rear curtain 4e, and blocking the crop debris entrained in the cyclone from the opening between the partition plate 1e and the lower screen 8d. Enter the grain collection area M.

As an alternative implementation of this embodiment, the rear curtain 4e may not be provided, and only the front curtain 3e may be provided.

As shown in FIG. 24, the driving structure includes two bearing seats 2g, a transmission shaft 3g, two eccentric bearings 4g and a driving wheel 5g. The frame of the harvester is composed of a plurality of vertically arranged support beams 12b and an assembly beam erected between the support beams 12b. The frame shell is installed between the adjacent beams, and an installation cavity is formed in the shell, and the vibrating screen H is installed in the inside the installation cavity.

As shown in FIG. 24 , two bearing seats 2g are respectively fixed on the side walls of two symmetrical support beams 12b at the rear end of the frame. An outer spherical bearing is installed in any bearing seat 2g, and both ends of the transmission shaft 3g are respectively fixed on the outer side. in spherical bearings. The two eccentric bearings 4g are respectively fixed on both ends of the transmission shaft 3g in a mirror image, one end of the vibrating screen H is fixed on the two eccentric bearings 4g, the other end is set on the frame through the reciprocating guide structure, and the driving wheel 5g is fixed on the transmission shaft 3g. One end is adapted to be driven by the driver of the harvester and drive the transmission shaft 3g to rotate. The bearing seat 2g is directly fixed on the support beam 12b of the frame to avoid transitional connection, and directly bear the gravity of the vibrating screen H and the inertial force of its reciprocating motion through the frame, so that the vibration of the vibrating screen H is more stable.

The reciprocating guide structure includes two orbital bearings 61g and a vibration orbit 62g corresponding to the two orbital bearings 61g. As shown in FIG. 26, the orbital bearings 61g are symmetrically fixed on both sides of the vibrating screen H and away from the end of the transmission shaft 3g. The rails 62g are symmetrically arranged on the racks on both sides of the vibrating screen H. As shown in Figure 27, the vibrating rails 62g are composed of a bottom plate and a side plate oppositely arranged on the bottom plate. A guide channel is formed between the two side plates. The guiding direction of 62g is arranged at an angle with the horizontal plane, and the track bearing 61g is slidably arranged in the vibration track 62g,

A linkage 7g is provided between the vibrating screen H and the eccentric bearing 4g. As shown in Figure 28, the linkage 7g includes a ring sleeve 71g and a linkage plate 72g welded and fixed on the ring sleeve 71g. One end of the ring sleeve 71g is open and flanged. The flange is perpendicular to the wall surface of the ring sleeve 71g, and the ring sleeve 71g is sleeved and fixed on the eccentric bearing 4g. The other end of the linkage plate 72g is fixed on the side screen body of the vibrating screen H.

As shown in FIG. 24 or FIG. 25, the protective plate 9g is fixed on the support beam 12b close to the driving wheel 5g, and the plate surface of the protective plate 9g extends along the radial direction of the transmission shaft 3g. In this embodiment, the protective plate 9g is arranged across the On the bearing seat 2g, and the bearing seat 2g is provided with a gap. The area of the protective plate 9g is larger than the cross-sectional area of the driving wheel 5g, so as to fully block the crop straw and other debris screened out from the tail of the vibrating screen H, and prevent debris from entering the driving area on one side of the frame, causing entanglement or blocking, affecting normal operation of the machine.

As shown in Fig. 24 or Fig. 25, the detachable installation counterweight 8g on the drive wheel 5g, the end of the transmission shaft 3g away from the protective plate 9g is also provided with counterweight 8g, and the breeding block is detachably fixed on the connecting block. , the connecting block is fixed on the transmission shaft 3g, and the breeding blocks at both ends of the transmission shaft 3g are arranged asymmetrically. During the rotation of the transmission shaft 3g and the reciprocating motion of the vibrating screen H, the asymmetrically arranged counterweights 8g are used to avoid vibration. The reciprocating vibration of the screen H is too violent to ensure the balance of the overall vibration of the vibrating screen H.

As shown in FIG. 29 , the air supply system includes a fan, an air supply channel, a tail cover 2j and a baffle 3j. An air supply channel is formed between the bottom shell located at the lower part of the harvester and the upper threshing system, and the bottom shell includes the fan shell 3f, the grain bottom shell 5e, the miscellaneous bottom shell 6e and the screen frame 1h of the vibrating screen, which are successively arranged in sequence. The threshing system includes a first drum 2a and a second drum 3a arranged at horizontal intervals. The tail end of the threshing system far from the fan, that is, the side of the second drum 3a close to the discharge port 5j, is installed with a tail cover 2j, a discharge port 5j is formed between the tail cover 2j and the screen frame 1h, and a flow resistance is set between the tail cover 2j and the vibrating screen 3j to direct the supply air toward the discharge port 5j.

In the vertical direction, the height of the discharge port 5j is higher than the height of the air outlet 33f. As shown in FIG. 30 , the air outlet 33f is disposed obliquely upward. The screen frame 1h is inclined from the side of the air outlet 33f toward the discharge port 5j and is gradually increased. The two ends of the fan casing 3f are respectively provided with first air inlets 31f that communicate with the outside world, and the middle of the fan casing 3f is opposite to the air outlet 33f. The side wall of the fan is provided with a second air inlet 32f along its circumferential direction, and air is supplied through three air inlets evenly distributed on the fan casing 3f, so that the air volume in the fan is uniform and stable. The air outlet 33f is gradually increased toward the discharge port 5j to improve the flowability, and the baffle 3j is installed on the tail cover 2j to guide the supply air toward the discharge port 5j, so as to prevent the return air from entering the threshing system and the screening system and affecting the cleanliness of crops. The air supply system has a compact and stable structure, sufficient air volume, and no return air effect, which greatly improves the air selection efficiency.

As shown in FIG. 30 , two air guides are arranged in the air outlet 33f at intervals in the vertical direction, and the air outlet 33f is spaced to form three air outlet branches. In this embodiment, the air guide member is a plate-like structure, which is an upper air guide plate 41j located above and a lower air guide plate 42j located below. The two air guides are respectively mounted on the rack 1 in a rotatable manner, and are adapted to be respectively turned over to change the air outlet direction and air outlet area of the three air outlet branches. For example, the two ends of the two air guides are respectively fixed on two fixing points (not shown in the figure) of the frame 1 by two bolts, one of which is a waist-shaped hole with an arc, and the air guides can be Swing the angle around another fixed point, and lock the air guide in the waist-shaped hole when it swings to a suitable position. It is also possible that each fixed point corresponds to a strip hole, and the fixed positions of the two fixed points are different, so as to realize the adjustment of the angle between the air guide and the horizontal plane.

In this embodiment, as shown in FIG. 29 , the tail cover 2j is bent and arranged, a rear sealing plate 1j is arranged between the tail cover 2j and the second drum 3a, the rear sealing plate 1j is horizontally arranged, and the tail cover 2j is hingedly arranged on the rear sealing plate 1j. On the plate 1j, it is suitable for flipping up and opening. A cavity is formed between the tail cover 2j and the lower screen frame 1h, and the flow blocking member 3j is arranged in the cavity. As shown in FIG. 31, the baffle 3j includes a threshing sealing plate 31j horizontally fixed on the side of the second drum 3a close to the discharge port 5j, the threshing sealing plate 31j is arranged parallel to the upper rear sealing plate 1j, and the threshing sealing plate 31j is arranged on the threshing sealing plate The tail cover sealing plate 32j between 31j and the end of the tail cover 2j, the lower surface of the threshing sealing plate 31j and the tail cover sealing plate 32j form a wind guide surface, so as to prevent the wind blown by the fan from rising through the surface of the screen frame 1h and then entering the tail cover 2j and the tail cover. The cavity between the screen frames 1h, and rotates along the empty wall into the threshing system or screening system, which affects the cleanliness of crops and the efficiency of wind selection. In this embodiment, the tail cowl sealing plate 32j is provided in two sections hinged to each other, and the tail cowl sealing plate 32j and the threshing sealing plate 31j are hingedly arranged, so that the tail cowl sealing plate 32j can be simultaneously driven when the tail cowl 2j is opened upwards. Rotate upward to avoid the need to disassemble the tail cover sealing plate 32j first when the tail cover 2j is flipped upward and opened, which leads to complicated operation and affects the efficiency.

As shown in FIGS. 32 and 33 , the fan includes a fan casing 3f, a fan structure, and a fan drive.

The fan structure is installed in the cylindrical installation cavity of the fan casing 3f, and the two ends of the fan casing 3f in the axial direction are respectively provided with first air inlets 31f which communicate with the outside world. The first air inlet 31f is a circular air inlet and is arranged concentrically with the cross section of the cylindrical installation cavity. An air outlet 33f is provided on the side wall of the fan housing 3f along its axial direction, and the width of the air outlet 33f is the same as that of the installation cavity. An air guide structure can be installed on the air outlet 33f, so as to guide the air to blow in a set direction.

As shown in FIG. 32 , a second air inlet 32f is formed on the side wall of the fan casing 3f opposite to the air outlet 33f along the circumferential direction of the fan casing 3f. The projection of the second air inlet 32f on the horizontal plane is a square. In the axial direction of the fan casing 3f, the second air inlet 32f is located at the middle position of the fan casing 3f. In this embodiment, the second air inlet 32f is located on the fan housing 3f obliquely above the air outlet 33f. A second air inlet 32f is opened in the middle of the casing, and cooperates with the first air inlets 31f at both ends of the fan casing 3f to form three air inlets evenly distributed on the fan casing 3f, providing sufficient air intake volume and making the air intake more even.

As shown in FIG. 33 , each first air inlet 31f on both sides is provided with a wind shield. In this embodiment, the wind shield is a plate-like structure, and each first air inlet 31f is correspondingly provided with two shields. As shown in FIG. 33, the two wind shields are respectively a first wind shield 51i disposed on the side close to the air outlet 33f and located in the upper half of the first air inlet 31f, and a first wind shield 51i disposed on a side away from the air outlet 33f. The second wind deflector 52i on the side and located at the lower half of the first air inlet 31f. In this embodiment, the casing of the rack 1 is provided with a communication port corresponding to the first air inlet 31f to communicate with the outside world. The size of the communication port is the same as that of the first air inlet 31f. On the shell of the rack 1, and the first air inlet 31f is directly opposite to the communication port, the first air baffle 51i and the second air baffle 52i are respectively provided with strip holes, and the corresponding fan casing 3f and the rack 1 is provided with matching holes, and the strip-shaped holes on the first wind deflector 51i are arranged horizontally, so that the first wind deflector 51i can slide laterally and partially block the upper half of the first air inlet 31f. The strip holes on the second wind deflector 52i are arranged vertically, so that the second wind deflector 52i can slide vertically and partially block the lower half of the first air inlet 31f. The air intake area of the air inlet 31f changes the air intake volume under different working conditions to make it applicable to a wider range.

As shown in FIG. 36, the fan structure includes a fan shaft 1i, several support units and a plurality of fan blades 2i. As shown in FIG. 33 , both ends of the fan shaft 1i protrude from the first air inlet 31f, and are rotatably fixed in the bearing seat on the frame 1 . And one end of the fan shaft 1i is installed with a driving pulley, which is used to connect the transmission shaft and provide the driving force for the rotation of the fan structure. In this embodiment, the fan is driven by a belt drive.

As shown in FIG. 36, the support units are fixed on the fan shaft 1i at regular intervals, and the fan blades 2i are fixed on the support unit. As shown in FIG. 34, each support unit includes a plurality of fan blade brackets 3i, along the circumference of the fan shaft 1i The fan blades 2i are bolted and fixed to the fan blade brackets 3i respectively.

In this embodiment, the fan blade bracket 3i is a plate-like structure, and the fan blade bracket 3i is bent to form a fixed section 32i and an installation section 31i. In the same support unit, the fixed section 32i of one fan blade bracket 3i is bolted and fixed to the other. On the installation section 31i of the fan blade bracket 3i, a plurality of fan blade brackets 3i are connected end to end in sequence, forming a polygon around the fan shaft 1i, and the polygon circumscribes the circle of the cross section of the fan shaft 1i. The plurality of fan blade brackets 3i are fixed around the fan shaft 1i by means of bolting, the structure is simple and stable, and the parts are easily and quickly disassembled and replaced.

All fan blade supports 3i in any supporting unit form a regular polygon, and the included angle α formed between the fixed segment 32i and the mounting segment 31i is complementary to the interior angle β of the regular polygon. As shown in FIG. 34 or FIG. 36 , in this embodiment, four fan blade brackets 3i are arranged in any supporting unit, and the fixed section 32i and the installation section 31i in each fan blade bracket 3i are arranged at right angles, and together they enclose an outer circumference. The cross-sectional circle of the fan shaft 1i is a square.

In this embodiment, as shown in FIG. 35 , a flat groove 11i is formed on the fan shaft 1i corresponding to any support unit, and a reinforcing plate 4i is welded in the flat groove 11i, and the thickness of the reinforcing plate 4i is the same as the groove depth of the flat groove 11i , that is, the upper surface of the reinforcing plate 4i is in a tangent state with the circle of the cross section of the fan shaft 1i, and the width of the reinforcing plate 4i along the radial direction of the fan shaft 1i is not greater than the diameter of the fan shaft 1i, that is, it is avoided to be larger than the fan blade bracket 3i. The side length of the square makes it impossible to assemble. In this embodiment, the width of the reinforcing plate 4i is the same as the width of the flat groove 11i. The position of the flat groove 11i further avoids relative sliding between the fan blade bracket 3i and the fan shaft 1i due to the small clamping force of the fan blade bracket 3i fixed on the fan shaft 1i.

As shown in FIG. 36 , in this embodiment, four supporting units are arranged on the fan shaft 1i at intervals in sequence, and four fan blades 2i are provided on the two supporting units on the left side. The fan blades 2i are sheet-like structures. The blade 2i spans the two support units and is bolted to the mounting sections 31i of the two blade brackets 3i. The fan blades 2i on the two supporting units on the right are the same as those on the left, and the specific structures are not repeated here. The fan blades 2i on the left and right sides form two parallel fan structures, and more air inlet channels can be provided between the two fan structures, so that the fan has a large air supply area and uniform air supply.

As an alternative implementation of Embodiment 1, a plurality of flat grooves 11i may be opened on the fan shaft 1i, and the flat grooves 11i are provided in a one-to-one correspondence with the fan blade brackets 3i, and the fan blade brackets 3i are directly embedded in the flat grooves 11i. Inside, and bolted end to end in turn, locked on the fan shaft 1i.

As shown in Figure 37, the cleaning transmission system includes an output pulley 1s connected to the engine drive. The output pulley 1s is divided into three transmission lines, and the three transmission lines are distributed on the same side wall of the frame 1.

In this embodiment, the intermediate transmission shaft 10s is rotatably arranged in the two bearing seats at the front end of the frame 1, and one end of the intermediate transmission shaft 10s is fixed with the input pulley 11s, and the input pulley 11s passes through the main clutch belt and the engine on the frame 1 (Fig. Not shown) drive connection, the other end is fixed with output pulley 1s, used to drive and connect other power mechanisms of the harvester, other power mechanisms include threshing mechanism, shredding mechanism, wind sorting mechanism, grain storage mechanism, and complex removal. agencies and screening agencies. The output pulley 1s is a multi-groove pulley, and the output pulley 1s can be composed of multiple multi-groove pulleys, and is fixed at one end of the intermediate transmission shaft 10s at the same time, and is suitable for rotating with the intermediate transmission shaft 10s. In this embodiment, the output pulley 1s and the pulleys in other power mechanisms are connected by a V-belt drive. Of course, a chain can also be used, but the chain drive is not as stable as a V-belt. Secondly, the threshing drum is blocked, causing the drum When the cover and other components are damaged by rupture, the chain may not be broken, and the power will continue to be transmitted, which may easily cause damage to the components. When the V-belt is driven, when the above situation occurs, the V-belt will slip and burn, which will affect the normal operation, so that even if the user is reminded to stop for cleaning and maintenance, other parts will not be damaged. Therefore, the V-belt is preferred. transmission.

As shown in FIG. 37 , the first transmission includes an output pulley 1s, a first threshing pulley 2s, and a second threshing pulley 3s. Three C-shaped V-belts are used for transmission connection between the output pulley 1s and the first threshing pulley 2s, so that the overall cross-section of the V-belt increases and the transmission power is improved. The first threshing pulley 2s and the second threshing pulley 3s are connected by a 2HB linked belt drive. The combined belt can fit well with the pulley, the force is uniform, and the transmission stability and impact resistance are good, so as to adapt to the high-strength working environment of the threshing drum.

The second transmission includes output pulley 1s and chopper pulley 4s. The chopper is generally arranged at the rear end of the rack 1, and the span between the output pulley 1s and the output pulley 1s is relatively large. Therefore, the first The transition wheel 71s is divided into two-stage transmission. The first transition pulley 71s is rotatably disposed on the frame 1 through the mounting frame, and is located on the connection line between the output pulley 1s and the chopper pulley 4s. The first transition pulley 71s adopts a multi-groove pulley. The output pulley 1s is in a driving connection with the first transition pulley 71s, and the first transition pulley 71s is in a transmission connection with the chopper pulley 4s.

The third transmission includes output pulley 1s, fan pulley 51s, grain pulley 52s, miscellaneous excess pulley 53s and screening pulley 6s. In the third-path transmission, there are many transmission components and the transmission span is large, therefore, a second transition wheel 72s is provided in the third-path transmission, which is also divided into two-stage transmission. The first-stage transmission is the transmission connection between the output pulley 1s, the fan pulley 51s, the grain pulley 52s, the second transition pulley 72s and the miscellaneous pulley 53s; the second-stage transmission is the second transition pulley 72s and the screening pulley Transmission connection between 6s. In order to ensure that the rotation directions of the screening pulley 6s and the output pulley 1s are opposite, the second transition pulley 72s adopts a multi-slot pulley. In the first-stage transmission, the outer side of the V-belt is in contact with the groove surface of the second transition wheel 72s, so that the rotation direction of the second transition wheel 72s is opposite to the rotation direction of the output pulley, so that the transmission with the second transition wheel 72s The connected screening pulley 6s rotates in the opposite direction to the output pulley 1s.

In this embodiment, a tensioning assembly is installed between adjacent pulleys. As shown in FIG. 38 , any tensioning assembly includes a tensioning arm 81s, a tensioning pulley 82s, a tension rod 83s and a tension spring 84s. In this embodiment, the tensioning arm 81s has a triangular structure, one corner of the triangle is hingedly mounted on the frame 1, and the other two corners are free ends, one free end of which is rotatably installed with the tensioning wheel 82s, and the other free end A tension spring 84s is arranged between the tension rod 83s, the tension rod 83s is fixed on the frame 1, and the tensioning pulley 82s is located between the hinge point of the tension arm 81s on the frame 1 and the fixing point of the tension rod 83s on the frame 1. so that under normal conditions, the tensioning pulley 82s is tensioned and pressed against the V-belt by the biasing force of the tension spring 84s.

As shown in Fig. 39, in this embodiment, the grain auger 521s is horizontally installed at the bottom of the frame 1, one end of which is fixed with the grain pulley 52s, and the other end is connected to the granary auger 522s through the direction changing gear box 9s, and the granary auger 522s It is a vertical lifting auger, which is suitable for lifting the grain conveyed by the lower grain auger 521s upward and entering the granary from the upper inlet of the granary. The miscellaneous auger 531s is horizontally installed at the bottom of the frame 1, one end of which is fixed with the miscellaneous pulley 53s, and the other end is connected to the reeling auger 532s through the direction-changing gearbox 9s, and the reeling auger 532s is inclined in the vertical direction. The hoisting auger is suitable for lifting the miscellaneous waste carrying the grains conveyed by the miscellaneous waste auger 531s up to the threshing drum for re-threshing, so as to avoid waste of grains. The power for grain entering and re-feeding is provided by the output pulley 1s, and the structure is simple and compact.

The power input of the threshing mechanism, the shredding mechanism, the wind sorting mechanism, the grain warehousing mechanism, the complex removal mechanism and the screening mechanism of the harvester are all arranged on the same side of the frame 1, so that the transmission system of the whole machine has a compact structure. All drive pulleys are set on the same side for easy installation, control and debugging. And the power input of each mechanism is directly provided by the output pulley 1s, which avoids the transmission loss caused by the intermediate transmission, reduces the workload of the mechanism providing the intermediate transmission, and improves the transmission efficiency and service life of the whole machine.

As shown in Figures 40 and 47, the chopper assembly includes a grass discharge channel, a grass inlet (not shown) and a grass discharge opening 10p at both ends of the grass discharge channel, and both ends of the movable knife roller 1r are rotatably fixed. On the left side wall 10r and the right side wall 11r of the grass discharging channel, in order to clearly show other structures, the left side wall 10r and the right side wall 11r are only partially shown in FIG. 40 . The movable knife roll 1r is a cylindrical roll. A plurality of movable blades 2r are arranged in a spiral shape and are detachably mounted on the movable knife roller 1r, and any movable blade 2r is parallel to the cross section of the movable knife roller 1r.

As shown in FIG. 42 , a plurality of movable knife bases 5r are welded and fixed to the movable knife roller 1r, and the movable blades 2r are in one-to-one correspondence and fixedly installed in the movable knife base 5r. Each movable knife seat 5r has a recessed structure. In this embodiment, the movable blade 2r is bolted and fixed in the recessed mounting cavity of the movable knife seat 5r.

As shown in FIG. 43 , in the square structure after the movable knife roller 1r is spread and tiled along one of its cylindrical generatrixes, in the longitudinal direction, a plurality of movable knife seats 5r are arranged in a row and inclined, as shown in FIG. 43 . , the six movable knife seats 5r form a row, and the first movable knife seat 5r from the upper left is arranged in an inclining interval to the lower right. In the width direction, the movable knife seats 5r are arranged in multiple rows. As shown in FIG. 43 , in this embodiment, the movable knife seats 5r form four rows from top to bottom, and the four rows of movable knife seats 5r are inclined in the same direction. And the movable knife seats 5r in the adjacent rows are arranged at intervals in the length direction, that is, the first movable knife seat 5r and the second movable knife seat 5r are arranged in dislocation, and the first movable knife seat 5r is arranged with the third movable knife seat 5r. The position of the knife seats 5r is the same, forming a row-by-row intersection, and the distribution state on the movable knife roller 1r is shown in Figure 44, so that the orthographic projection of all the movable knife seats 5r on the plane where the cross section of the movable knife roller 1r is located is a closed ring. 45, after the movable blade 2r is installed in the movable knife seat 5r, the movable blade 2r can also form a closed loop on the plane where the cross section of the movable knife roller 1r is located.

The fixed knife seat 3r is arranged obliquely below the movable knife roller 1r. As shown in FIG. 41, a plurality of fixed blades 4r are arranged on the fixed knife seat 3r in the same direction and evenly spaced, and a row of adjacent fixed blades 4r passes through correspondingly. The movable blade 2r, for example, in FIG. 43, the first row of movable blades 2r is the movable blade 2r on the first movable blade seat 5r from the left in the first row and the third row, and the second row of movable blades 2r is the second row and the movable blade 2r. The movable blade 2r on the first movable blade seat 5r from the left in the fourth row, and so on.

When the movable knife roller 1r is driven to rotate, the movable knife roller 1r drives the movable blade 2r to rotate through the gap between the fixed blades 4r. The movable blades 2r are arranged in a spiral shape on the roller surface of the movable knife roller 1r. When the movable knife roller 1r is in any rotational position, it can be ensured that all the movable blades 2r can pass through the gap between the fixed blades 4r, that is, it can be The cutting state between the movable blade 2r and the fixed blade 4r is always maintained. Under the normal rotation speed of the movable blade roller 1r, the cutting efficiency is still improved, the power output cost for increasing the rotation speed is reduced, and the damage caused by increasing the rotation speed is avoided. Safety hazards brought about by dynamic balancing.

As shown in Fig. 46, the anti-wrap ring K is sleeved on the bearing seats at both ends of the movable knife roller 1r and fixed on the left side wall 10r and the right side wall 11r. As shown in FIG. 46, each anti-winding ring K includes at least two ring plates 1k and at least two clamping plates 2k. The ring plates 1k are respectively in circular arc structures, and all the ring plates 1k are connected end to end to form an annular isolation area. At least two card boards 2k are fixed on one of the two adjacent ring boards 1k, and a slot 3k is formed between them and the ring board 1k; the other ring board 1k is suitable for being inserted and fixed on The slot is 3k.

In this embodiment, as shown in FIG. 46 , any ring plate 1k includes a bottom plate 11k and a side plate 12k, the bottom plate 11k is a flat plate and is bent in a circular arc shape, and the side plate 12k is a curved plate, along the outer edge of the bottom plate 11k In this embodiment, the bottom plate 11k and the side plate 12k are integrally formed.

In this embodiment, two ring plates 1k are provided, and the two ring plates 1k are both semi-circular arc shapes. Drill holes on the top, and connect the two ring plates 1k by bolts. The bottom plate 11k also has a number of mounting holes 5k. The mounting holes 5k match the size of conventional bolts. The bolts pass through the mounting holes 5k to install and fix the anti-winding ring on the left side wall 10r and the right side wall 11r. Of course, the number of the ring plates 1k can also be three or four, etc., which are connected end to end in sequence, and can be enclosed in a circular isolation area. The specific number of the ring plates 1k depends on the specific situation.

In this embodiment, the side plate 12k of any ring plate 1k is arranged perpendicular to the bottom plate 11k, the clamping plate 2k is bent in an L-shape, and the short side of the L-shape is welded and fixed on the outer wall surface of the side plate 12k, and is located on the side plate At both ends of 12k, the L-shaped long side and the side plate 12k are arranged in parallel, a slot 3k is formed between the card board 2k and the side plate 12k, and the two ends of the other side plate 12k are correspondingly inserted into the slot 3k .

As shown in FIG. 46, the bottom plate 11k is also provided with at least one barrier removal port for observing or extending into other equipment. In this embodiment, the barrier removal port is directed from the inner edge of the arc-shaped bottom plate 11k to the outer ring. The barrier removal groove 4k is formed with a concave edge. The barrier removal groove 4k is an isosceles trapezoid as a whole, and the width of the groove is larger than the width of the groove bottom. The notch is located on the inner ring of the bottom plate 11k, and the hole enclosed by the bottom plate 11k of the anti-winding ring is used to sleeve and fix it on the bearing seat. Therefore, the notch is fastened to the surface of the bearing seat, and the size of the notch is large, which is more convenient to observe the inside. Happening. In this embodiment, two barrier removal grooves 4k are respectively provided on the bottom plate 11k of each ring plate 1k, and four barrier removal grooves 4k are evenly spaced on the circumference.

The annular isolation area is enclosed by the ring plate 1k, which is suitable for being sleeved and fixed on the driving shaft, and blocked in the gap, so as to prevent weeds or straws from being entangled on the driving shaft.

As shown in FIGS. 47 and 48 , the spreading structure includes a grass distributor 1p, a plurality of first grass guides 2p, and a plurality of second grass guides 3p. As shown in Fig. 48, an extension section 11p is provided on the grass dividing board 1p. The width of the extension section 11p is the same as the width of the grass discharge opening 10p. edge. The grass dividing board 1p is inclined downward as a whole.

The board surface of the grass dividing board 1p is gradually increased from the extending section 11p to the end away from the grass discharging opening 10p. on the lower surface and close to one end of the grass discharge opening 10p. The first grass guide plate 2p is perpendicular to the grass dividing plate 1p and is arranged at an angle with the center line of the grass dividing plate 1p. In this embodiment, there are three first grass guide plates 2p, which are arranged on the grass dividing plate 1p at different angles, and are suitable for guiding the broken straw in different directions. The first grass guides 2p may also be provided with four, five, etc., depending on specific needs, and the first grass guides 2p are symmetrically arranged with respect to the center line of the grass dividing board 1p.

As shown in FIG. 48 , a plurality of second grass guides 3p are provided on the end of the grass dividing plate 1p away from the grass discharging opening 10p, and the second grass guiding plates 3p are arranged at intervals on the grass dividing plate along the direction parallel to the edge of the grass discharging opening 10p 1p on the lower surface. Similarly, the second grass guide plate 3p is perpendicular to the grass dividing plate 1p and is arranged at an angle with the center line of the grass dividing plate 1p. In this embodiment, the number of the second grass guides 3p is greater than the number of the first grass guides 2p. For example, there are seven second grass guides 3p, and the seven second grass guides 3p are evenly spaced, and the number of the second grass guides 3p is evenly spaced. The midline of the grass board 1p is set symmetrically. The angle between the second grass guide 3p and the center line of the grass divider 1p gradually increases from the second grass guide 3p close to the center line of the grass divider 1p to the second grass guide 3p away from the center line of the grass divider 1p To increase the setting, in this embodiment, except for the second grass guide 3p located on the middle line of the grass dividing board 1p, the other second grass guides 3p are curved panels, so that all the second grass guides 3p are fan-shaped as a whole. The first grass guide plate 2p and the second grass guide plate 3p form a trapezoidal structure, and the crushed straw coming out of the grass discharge port 10p is guided and dispersed for the first time through the first grass guide plate 2p, and then passes through the second grass guide. The plate 3p spreads in a wide range and at multiple angles, so that the grains and grasses cut and broken by the movable blade 2r and the fixed blade 4r are evenly spread in the field, avoiding in-line accumulation in the field, and improving the spreading efficiency.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived from this are still within the protection scope of the present application.

Claims

A combine harvester is characterized in that it comprises: a vehicle frame (2), a walking mechanism (3) is arranged below the chassis of the vehicle frame (2); (7), threshing and cleaning system, cleaning transmission system and grain storage components;

The harvesting assembly comprises a header (41) and a crop conveying structure (42); the cab (7) and the crop conveying disassembly structure are arranged in parallel at the front of the frame (2);

The threshing and cleaning system includes a double-screw threshing and conveying system, which has a figure-shaped threshing direction; the threshing and cleaning system and the grain storage assembly are arranged in parallel at the rear of the frame (1); the crop conveying The structure (42) communicates with the feeding port of the threshing and cleaning system; the feeding port is arranged at the front end of the threshing and cleaning system and is close to the grain storage component; the distributing structure in the threshing and cleaning system is arranged at the The tail end of the threshing and cleaning system is close to the grain storage assembly;

The power assembly includes an engine (51) and a gearbox (52); the engine (51) is fixed on the chassis of the vehicle frame (2) between the cab (7) and the grain storage assembly; the engine (51) is suitable for driving the cleaning transmission system; the cleaning transmission system is arranged on the threshing and cleaning system and is located on the side facing away from the grain storage assembly.
The combine harvester according to claim 1, wherein the double screw threshing conveying system comprises:

Two concave plate screens are arranged on the frame (1) in parallel and at intervals in the horizontal direction; the inner screen surface of any one of the concave plate screens is in the shape of an arc; the two concave plate screens are located on the machine A transition port (6b) is provided radially at one end of the frame (1) on the same side; the two transition ports (6b) face each other and communicate with each other;

a transition plate screen (7b), which is laid between the two concave plate screens and connects the two transition ports (6b);

A feeding port (21b) for crops is provided on the other end of the concave screen which is located opposite to the transition port (6b) and away from the transition port (6b);

Two cylinder covers, in one-to-one correspondence and buckled on the concave plate screen, form a hollow cylindrical installation cavity with the concave plate screen; any one of the cylinder covers is spaced from the wall surface of the installation cavity A number of guides are provided; the crops entering the installation cavity are adapted to be moved directionally around the axis; the guiding directions of the guides in the two cylinder covers are opposite;

Two rollers are respectively coaxially and rotatably arranged in the installation cavity; the rollers are respectively arranged with a gap between the corresponding inner screen surface and the end surface of the guide member; the working area of the rollers The length of the corresponding intaglio screen is the same; the length of the two intaglio screens is the same.
The combine harvester according to claim 2, characterized in that it further comprises a limit adjustment structure, which is detachably arranged between the outer screen surfaces of the two concave plate screens and the transition plate screen (7b) to form a the gap (10b).
The combine harvester according to claim 3, wherein the limit adjustment structure further comprises:

Two adjusting pieces, which are in the shape of an arc as a whole, are respectively fixed on the two concave screen screens on both sides of the gap (10b); the two sides of the sealing plate (9b) are respectively fixed on the two adjusting pieces on the piece.
The combine harvester according to claim 4, wherein any one of the adjusting members comprises:

an adjusting plate (91b), the surface of which is in an arc shape matching the concave screen to which it is fixed; the surface of the adjusting plate (91b) is suitable for partially blocking the transition port (6b);

Two mounting plates (92b) are bent along the adjusting plate (91b) and are respectively fixed on opposite sides of the adjusting plate (91b); one of the mounting plates (92b) is suitable for being fixed on the concave plate On the screen, the other mounting plate (92b) is adapted to be fixedly connected to the sealing plate (9b).
The combine harvester according to claim 5, wherein the cross-section of the adjusting member is in the shape of a concave shape.
The combine harvester according to claim 2, characterized in that, the screen surface of the transition plate screen (7b) is arranged tangentially to the inner screen surface of the concave plate screen that first contacts the crops.
The combine harvester according to claim 2, wherein the barrel cover comprises a square mounting frame (22c) and a circular arc-shaped cover (21c) hingedly arranged with one side frame of the mounting frame (22c). ); the mounting frame (22c) is adapted to be overlapped and fixed on the edge of the concave plate screen;

The cover body (21c) includes an arc-shaped top cover (211c) and side top plates (212c) sealed on both sides of the top cover (211c); the guide member is along the inner wall surface of the top cover (211c) They are arranged at intervals, and guide channels are formed between the adjacent guide pieces.
The combine harvester according to claim 2, characterized in that, on any one of the drums, a plurality of toggles are arranged at intervals along the axial direction of the drum; all the toggles have the same size; The distance from the end face of the toggle member to the axis of the drum forms the rotation radius of the drum;

The height of the lowest point of the cylindrical surface formed by the rotation of the drum that contacts the crop later from the horizontal plane is greater than the height of the lowest point of the cylindrical surface formed by the rotation of the drum that first contacts the crop from the horizontal plane.
The combine harvester according to claim 1, wherein the threshing and cleaning system further comprises a screening system; the screening system comprises:

The vibrating screen (H) has an upper screen area and a lower screen (8d) area; the screen frame (1h) of the vibrating screen (H) has a funnel-shaped structure as a whole;

In the upper screen area, a corrugated plate (6d), a lifting structure, at least a section of fish scale screen (7d) and a tail screen (2h) are arranged in sequence along the direction of crop movement;

A lower sieve (8d) is arranged in the area of the lower sieve (8d) corresponding to the fish scale sieve (7d);

a front sealing structure, which is sealed and fixed at the front end of the corrugated plate (6d);

The grain separation structure is arranged at the end of the lower screen (8d), and is arranged across the grain collection area (M) and the miscellaneous waste collection area (N);

The driving structure is fixed on the frame (1) and is suitable for driving the vibrating screen (H) to vibrate back and forth.
The combine harvester according to claim 10, wherein the lifting structure is a shaking screen; the shaking screen comprises:

The mounting piece has a mounting surface (12d) and a mounting surface (11d) facing away from the mounting surface (12d) and arranged at an acute angle with the mounting surface (12d); the mounting surface (12d) is fixed on the corrugated surface (12d) the rear end of the plate (6d);

A plurality of screen teeth (2d) extend along the opening direction of the angle formed by the mounting surface (12d) and the mounting surface (11d), and one end is a fixed end, which is fixed on the mounting surface (11d) at intervals , and the other end is the free end, which is suspended.
The combine harvester according to claim 11, characterized in that, any one of the screen teeth (2d) is bent and arranged in a stepped shape; it is suitable for guiding crops along the screen teeth (2d) from a position on the installation surface (11d) The fixed end of the travels toward the free end.
The combine harvester of claim 10, wherein the front sealing structure comprises:

a seal, fixed between the front material plate (2f) at the front end of the corrugated plate (6d) and the fan casing (3f) located below the front material plate (2f); the width of the seal is not less than the width of the the width of the screen surface of the vibrating screen (H) between the front material plate (2f) and the fan housing (3f);

The opposite sides located in the width direction of the sealing element correspond to the left and right side walls of the frame (1) respectively and are arranged with a gap.
The combine harvester according to claim 13, wherein the front sealing structure further comprises:

A first shutter (6f) is arranged between the front material plate (2f) and the screen front plate (5f) of the vibrating screen (H); the first shutter (6f) is a flexible member, which is There is a stretch margin for the reciprocating vibration of the vibrating screen (H).
The combine harvester of claim 14, wherein the front sealing structure further comprises:

A second shutter (7f), one end of which is fixed on the end of the front material plate (2f) facing the vibrating screen (H), the other end is a free end, and naturally hangs down to the screen of the vibrating screen (H) face.
The combine harvester of claim 10, wherein the grain separation structure comprises:

A spacer is arranged between the grain collection area (M) and the miscellaneous waste collection area (N), and is fixed on the screen frame (1h); the spacer surface of the spacer is separated from the grain collection area (M) One side extends above the miscellaneous collection area (N);

A front curtain (3e), which extends in the same direction as the isolation surface, one end is fixed on the spacer, and the other end is placed on the grain bottom shell (5e) in the grain collecting area (M); suitable for The opening formed between the spacer and the grain bottom shell (5e) that communicates with the grain collection area (M) and the miscellaneous waste collection area (N) is blocked.
The combine harvester of claim 16, wherein the grain separation structure further comprises:

The rear curtain (4e) is arranged at an angle to the isolation surface, and one end is fixed on the spacer, and the other end is placed on the miscellaneous waste bottom case (6e) in the miscellaneous waste collection area (N); It is suitable for shielding the opening formed between the spacer and the miscellaneous bottom shell (6e) to communicate with the miscellaneous waste collection area (N) and the grain collection area (M).
The combine harvester of claim 10, wherein the drive structure comprises:

Two bearing seats (2g) are respectively fixed on the side walls of the two supporting beams (12b) symmetrically and vertically arranged at the rear end of the frame (1); any one of the bearing seats (2g) is installed inside and outside spherical bearing;

a transmission shaft (3g), the two ends of which are respectively fixed in the outer spherical bearing;

Two eccentric bearings (4g) are respectively fixed on both ends of the transmission shaft (3g) in a mirror image;

One end of the screen frame (1h) is fixed on the two eccentric bearings (4g), and the other end is arranged on the frame (1) through a reciprocating guide structure;

A driving wheel (5g), fixed on one end of the transmission shaft (3g), is suitable for being driven by the driver of the harvester and driving the transmission shaft (3g) to rotate.
The combine harvester according to claim 18, wherein the reciprocating guide structure comprises:

Two orbital bearings (61g), symmetrically arranged on both sides of the screen frame (1h) and away from the end of the drive shaft (3g);

Two vibrating rails (62g) are symmetrically arranged on the frame (1) on both sides of the screen frame (1h); the guiding direction of the vibrating rails (62g) is arranged at an angle with the horizontal plane; the rail bearings (61g) are slidably arranged in the vibration track (62g) in a one-to-one correspondence.
The combine harvester according to claim 1, wherein the threshing and cleaning system further comprises an air supply system; the air supply system comprises:

a fan having an air outlet (33f);

An air supply channel is formed between the bottom shell at the lower part of the harvester and the upper threshing system;

The bottom casing comprises a fan casing (3f), a grain bottom casing (5e), a miscellaneous bottom casing (6e) and a screen frame (1h) of the vibrating screen, which are successively arranged in sequence;

A tail cover (2j) is installed at the rear end of the threshing system far from the fan; a discharge port (5j) is formed between the tail cover (2j) and the screen frame (1h); the tail cover (2j) A baffle (3j) is arranged between the vibrating screen to guide the supply air towards the discharge port (5j);

In the vertical direction, the height of the discharge port (5j) is higher than the height of the air outlet (33f); the air outlet (33f) is inclined toward the discharge port (5j); the fan casing The body (3f), the grain bottom shell (5e), the miscellaneous bottom shell (6e) and the screen frame (1h) are inclined from the side of the air outlet (33f) toward the discharge port (5j) and are gradually increased;

The fan housing (3f) has a cylindrical installation cavity;

Both ends of the fan casing (3f) in the axial direction are respectively provided with first air inlets (31f) communicating with the outside world;

A second air inlet (32f) is provided on the side wall of the fan casing (3f) opposite to the air outlet (33f) along its circumferential direction; in the axial direction of the fan casing (3f) , the second air inlet (32f) is located in the middle of the fan housing (3f).
The combine harvester according to claim 1, wherein the cleaning transmission system comprises:

an output pulley (1s) connected to the engine drive; the output pulley (1s) is divided into three transmissions for output; the three transmissions are distributed on the same side wall surface of the frame (1);

The first drive includes an output pulley (1s), a first threshing pulley (2s) and a second threshing pulley (3s);

The second transmission includes output pulley (1s) and chopper pulley (4s);

The third transmission includes output pulley (1s), fan pulley (51s), grain pulley (52s), miscellaneous pulley (53s) and screening pulley (6s); all pulleys are connected by transmission.
The combine harvester of claim 21, further comprising:

A first transition wheel (71s), fixed on the frame (1) and arranged between the output pulley (1s) and the chopper pulley (4s); the output pulley (1s) ) is drivingly connected with the first transition wheel (71s); the first transition wheel (71s) is drivingly connected with the chopper pulley (4s).
The combine harvester of claim 21, further comprising:

The second transition wheel (72s) is fixed on the frame (1) and arranged in the third transmission; the output pulley (1s), the fan pulley (51s), the grain pulley (52s) ), the second transition pulley (72s) and the miscellaneous pulley (53s) in a transmission connection; the second transition wheel (72s) is in transmission connection with the screening pulley (6s).
The combine harvester of claim 21, wherein

The three-way transmission adopts the V-belt transmission connection.
The combine harvester according to claim 24, characterized in that, the first threshing pulley (2s) and the second threshing pulley (3s) are connected by a connecting belt drive.
The combine harvester according to claim 24, further comprising a plurality of tensioning assemblies distributed between adjacent pulleys and adapted to tension the V-belts between adjacent pulleys.
The combine of claim 26, wherein any one of the tensioning assemblies comprises:

One end of the tension arm (81s) is hingedly arranged on the frame (1), and the other end is a free end;

The tensioning wheel (82s) is fixed on the free end of the tensioning arm (81s);

The pull rod (83s) is fixed on the frame (1);

A tension spring (84s) is arranged between the tension rod (83s) and the tension arm (81s);

The tensioning pulley (82s) is tensioned against the V-belt by the biasing force of the tension spring (84s).
The combine harvester according to claim 21, characterized in that the grain auger (521s) is threaded on the frame (1), one end is fixed with a grain pulley (52s), and the other end is connected to the granary auger (521s). 522s); a direction-changing gear box (9s) is arranged between the grain auger (521s) and the granary auger (522s).
The combine harvester according to claim 21, characterized in that the miscellaneous auger (531s) is pierced on the frame (1), and one end is fixed with the miscellaneous pulley (53s), and the other end is connected to the complex The auger (532s); a direction-changing gearbox (9s) is arranged between the miscellaneous auger (531s) and the reeling auger (532s).
The combine harvester of claim 1, wherein the distribution structure comprises:

Grass dividing board (1p), fixed on the upper edge of the grass discharge port (10p);

The board surface of the grass dividing board (1p) is gradually expanded from the grass discharge opening (10p) toward the end away from the grass discharge opening (10p);

A plurality of first grass guide plates (2p) are arranged on the lower surface of the grass dividing plate (1p) at intervals along a direction parallel to the edge of the grass discharge opening (10p); the first grass guide plates (2p) ) is perpendicular to the grass dividing board (1p) and is arranged at an angle with the center line of the grass dividing board (1p).
The combine harvester according to claim 30, characterized in that, the first grass guide plate (2p) is arranged at one end close to the grass discharge opening (10p); further comprising:

A plurality of second grass guides (3p) are arranged on the lower surface of the grass dividing board (1p) at intervals along a direction parallel to the edge of the grass discharge opening (10p), and are located away from the grass discharge opening ( 10p); the second grass guide plate (3p) is perpendicular to the grass dividing plate (1p) and is arranged at an angle with the center line of the grass dividing plate (1p);

The number of the second grass guides (3p) is greater than the number of the first grass guides (2p).