WO2022141983A1

WO2022141983A1 - Screening system and combine harvester

Info

Publication number: WO2022141983A1
Application number: PCT/CN2021/089956
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: CN112690107A

Abstract

A screening system, comprising: a vibrating screen (H), which is provided with an upper screen area and a lower screen (8d) area, wherein a screen frame (1h) of the vibrating screen (H) is of a funnel-shaped structure as a whole, a corrugated plate (6d), a lifting structure, at least one section of chaffer (7d) and a tail screen (2h) are sequentially arranged in the upper screen area in the moving direction of crops, and a lower screen (8d) is arranged in the lower screen (8d) area and corresponds to the chaffer (7d); a front sealing structure, which is fixed to the front end of the corrugated plate (6d) in a sealed manner; a grain separating structure, which is arranged at the tail end of the lower screen (8d) and arranged between a grain collecting area (M) and a residue collecting area (N) in a crossing manner; and a driving structure, which is fixed to a rack (1) and suitable for driving the vibrating screen (H) to vibrate in a reciprocating manner. By means of the screening system, grains can be collected more completely and more cleanly, and the screening efficiency is improved. Further provided is a combine harvester comprising the screening system.

Description

A screening system and combine harvester

technical field

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

Background technique

Crawler-type combine harvester threshing system can be divided into crawler-type combine harvester threshing system can be divided into longitudinal axial flow threshing and cleaning system and horizontal axial flow threshing and cleaning system, these two forms of threshing and cleaning system are currently the market The main structural form used above.

In the screening area of the existing combine harvester, crops such as grains and straw are separated and screened by the reciprocating vibration of the vibrating screen. The tail end of the machine is inclined downward to guide the movement of the crops, but the vibration component of the vibrating screen in the horizontal direction will still cause the grains to fly out from the front end of the vibrating screen.

In the prior art, a canvas is set at the front end of the vibrating screen for shielding, but the vibrating screen is in a continuous working state. There will be gaps between the vibrating screens and between the left and right side walls of the frame, and the gap will expand from time to time during the vibration process, causing crop grains to leak out and fall from the front of the frame to the ground, which cannot be collected. waste.

At the same time, the separation of the grain collection area and the miscellaneous waste collection area under the vibrating screen is not complete, and it is easy to mix straw and other miscellaneous waste into the grain, which affects the cleanliness of the grain.

The corrugated plate is inclined downward toward the rear end of the harvester, and the drop between the adjacent fish scale screen is small. At the same time, the vertical drop of the elliptical vibration track of the vibrating screen is small, which together cause the crops to be unable to be fully lifted and scattered in the vibrating screen. Fluffy, resulting in agglomeration of crop stalks, entraining the grains to discharge, resulting in waste.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present application is to overcome the low screening efficiency of the harvester screening system in the prior art, which is prone to waste of resources.

According to one aspect of the present application, a screening system is proposed, comprising:

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.

Preferably, two sections of the fish scale screen are arranged at intervals along the horizontal direction; the fish scale screen pieces in the two sections of the fish scale screen are arranged at an included angle.

Preferably, the tail screen includes:

The mounting seat is inclined in the same direction as the adjacent fish scale screen and fixed on the screen frame;

A plurality of tail screen pieces extend from the mounting seat toward the obliquely upward direction in the direction of crop movement, and are fixed on the mounting seat at even intervals in the horizontal direction.

Preferably, the screen frame includes a rear sliding plate corresponding to the tail screen and an adjusting plate slidably arranged along the board surface of the rear sliding plate.

Preferably, 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.

Preferably, 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.

Preferably, 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.

Preferably, the gap between the two sides of the sealing member and the left and right side walls of the frame is filled with sealant.

Preferably, the front sealing structure further 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.

Preferably, the front sealing structure further includes:

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

Preferably, the grain separation structure comprises:

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.

Preferably, the grain separation structure further comprises:

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.

Preferably, the driving 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.

Preferably, 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.

Preferably, the driving structure further includes:

a protective plate, fixed on the support beam on one side of the driving wheel; the plate surface of the protective plate extends along the radial direction of the transmission shaft;

The area of the guard plate is larger than the cross-sectional area of the driving wheel.

According to another aspect of the present application, a combine harvester is proposed, comprising the above-mentioned screening system.

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

1. The screening system provided by the present application includes a vibrating screen, a front sealing structure, a grain separation structure and a driving structure. The vibrating screen has an upper screen area and a lower screen area. In the upper screen area, a lifting structure is set at the end of the corrugated plate to improve the drop between the corrugated plate and the fish scale screen. With the tail screen at the end, two stages of lifting are formed to fully lift the agglomerated particles. The crops are shaken and loosened, avoiding the discharge of grains entrained by the crop stalks, resulting in 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 waste, so that the collection of grains is more complete and clean, avoiding waste and improving screening efficiency.

2. In the screening system provided by this application, the lifting structure is a shaking screen, which includes 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 screen teeth It extends 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 at intervals on the mounting surface, and the other end is a free end, which is suspended in the air. The corrugated plate slides down onto the shaker screen, is shaken up by the suspended screen teeth, and then falls onto 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.

3. In the screening system provided by this application, a seal is fixed between the front material plate used to guide the grains to slide under the threshing drum of the harvester and the fan casing under the front material plate, and the width of the seal is not less than the width of the front material. The width of the screen surface of the vibrating screen between the plate and the fan casing, and the opposite sides located in the width direction of the sealing member correspond to the left and right side walls of the frame respectively and are 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.

4. In the screening system 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 collection area extends to the top of the miscellaneous waste collection area, and 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 grain bottom shell in the grain collection area to block the spacer and the grain bottom. The opening formed between the shells to connect the grain collection area and the miscellaneous waste collection area allows the fan to blow air along the front curtain and the separator and blow out from the opening formed between the separator and the lower screen, so as to prevent the return air from carrying miscellaneous waste into the grains The collection area will pollute 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 air selection.

5. In the screening system provided by the present application, the driving structure includes two bearing seats, a transmission shaft, two eccentric bearings and a driving wheel. The two bearing seats are respectively fixed on the side walls of the two symmetrical support beams at the rear end of the frame, an outer spherical bearing is installed in any bearing seat, and the two ends of the transmission shaft are respectively fixed in the outer spherical bearing. Two eccentric bearings are fixed on both ends of the drive shaft in a mirror image, one end of the vibrating screen is fixed on the two eccentric bearings, the other end is set on the frame through a reciprocating guide structure, and the driving wheel is fixed on one end of the drive shaft, suitable for harvesting The drive of the machine drives and drives the transmission shaft to rotate. The bearing seat is directly fixed on the support beam of the frame to avoid transitional connection, and directly bear the gravity of the vibrating screen and the inertial force of its reciprocating motion through the frame, so that the vibration of the vibrating screen is more stable.

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 that need to be used 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.

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

Fig. 2 is the structural representation of the shaking screen in the embodiment of the application;

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

Fig. 4 is the structural representation of the sieve fork group in the embodiment of the application;

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

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

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

FIG. 8 is a schematic structural diagram of a grain separation structure in an embodiment of the application;

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

Figure 10 is a schematic structural diagram 1 of the vibrating screen drive in the embodiment of the application;

Fig. 11 is the second structural schematic diagram of the vibrating screen drive in the embodiment of the application;

12 is a schematic structural diagram of the orbital bearing on the vibrating screen in the embodiment of the application;

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

FIG. 14 is a schematic structural diagram of a linkage member in an embodiment of the present application.

Description of reference numbers:

H, vibrating screen; M, grain collection area; N, miscellaneous residue collection area;

1. Frame; 12b. Support beam;

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; 4f, visible part; 5f, screen front plate; 6f, first shutter; 7f, second shutter; 8f, 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.

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 screening system, as shown in FIG. 1 , FIG. 5 , FIG. 11 and FIG. 12 , including 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. 1 or FIG. 5 , 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. In the upper screen area, a corrugated plate 6d and a shaking screen are sequentially arranged 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 and loosens the loose crops.

As shown in Figure 5, a rear sliding plate 11h is provided on the screen frame 1h 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. 2 , 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. 4 , in this embodiment, the screen teeth 2d have a cylindrical structure, but 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. 2 , 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. 6 , 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. 6 or FIG. 7 , the sealing plate 1f is arranged in a bent section, a section close to the front material plate 2f is vertically disposed, and a section close to the fan casing 3f is disposed obliquely, and is connected to the fan casing. 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. 6 , at least one observation port is provided at the vertical section of the sealing plate 1f. In this embodiment, two observation ports are provided, and each observation port is fixed with 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. 7, a first shutter 6f is also provided, and one end of the first shutter 6f is fixed on the front material 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 7, 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. 8, the grain separating structure includes a spacer and a front curtain 3e. As shown in Fig. 1, the separator 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. 8 , 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 that 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. 8 or FIG. 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. 8 , 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. 8 or FIG. 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. 9 , one end of the grain collecting area M of the separating plate 1e is provided with a flange 11e facing the miscellaneous waste collecting area N, and the included angle between the flange 11e and the surface of the separating 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. 10 , 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. 10 , two bearing seats 2g are respectively fixed on the side walls of two symmetrical supporting beams 12b at the rear end of the frame, and an outer spherical bearing is installed in any bearing seat 2g, and both ends of the transmission shaft 3g are respectively fixed on the outside 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. 12, 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 13, 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 arranged between the vibrating screen H and the eccentric bearing 4g. As shown in Figure 14, 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. 10 or FIG. 11 , 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. 10 or FIG. 11 , the detachable installation counterweight 8g on the driving wheel 5g, the end of the transmission shaft 3g away from the protective plate 9g is also provided with a 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.

Example 2

This embodiment provides a combine harvester, including the screening system in Embodiment 1.

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 screening system, characterized in that it includes:

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 screening system according to claim 1, characterized in that, the fish scale screen (7d) is provided with two sections at intervals along the horizontal direction; the fish scale screen pieces in the two sections of the fish scale screen (7d) are arranged at an included angle.
The screening system according to claim 2, wherein the tail screen (2h) comprises:

The mounting seat (21h) is inclined in the same direction as the adjacent fish scale screen and is fixed on the screen frame (1h);

A plurality of tail screen (2h) pieces are extended from the mounting seat (21h) toward the obliquely upward direction in the direction of crop movement, and are fixed on the mounting seat (21h) at even intervals in the horizontal direction.
The screening system according to claim 1, characterized in that, the screen frame (1h) comprises a rear slide plate (11h) provided corresponding to the tail screen (2h) and a rear slide plate (11h) slidably arranged along the board surface of the rear slide plate (11h). adjustment plate (12h).
The screening system according to any one of claims 1-4, 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 screening system according to claim 5, 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 the screen positioned on the installation surface (11d). The fixed end travels toward the free end.
The screening system according to any one of claims 1-4, 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 screening system according to claim 7, characterized in that the gaps between the two sides of the sealing member and the left and right side walls of the frame (1) are filled with sealant.
The screening system of claim 7, 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 screening system of claim 7, 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 screening system of any one of claims 1-4, 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 screening system of claim 11, 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 blocking 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 screening system according to any one of claims 1-4, wherein the driving 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 screening system of claim 13, 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 screening system of claim 14, wherein the drive structure further comprises:

A protective plate (9g) is fixed on the support beam (12b) on one side of the driving wheel (5g); the plate surface of the protective plate (9g) is extended along the radial direction of the transmission shaft (3g) ;

The area of the protective plate (9g) is larger than the cross-sectional area of the driving wheel (5g).
A combine harvester is characterized by comprising the screening system according to any one of claims 1-15.