CN210053922U - Harvester and screening mechanism for same - Google Patents

Abstract

The utility model discloses a harvester and be used for screening mechanism of harvester, screening mechanism includes the casing divide into screening district and lower collecting area in the casing, go up the screening district with cut apart through the reciprocating sieve down between the collecting area the upper portion in last screening district still is provided with the mechanism of induced drafting, its characterized in that: the reciprocating sieve is connected with eccentric wheel motion, the front end of reciprocating sieve is located the sharp slide, the sharp slide is greater than the inclination of reciprocating sieve by preceding tilt up backward and inclination, screening mechanism is provided with the screen cloth, be provided with multirow oblique ascending cockscomb structure grizzly strip on the screen cloth, the mechanism of induced drafting includes actuating mechanism and fan, the fan includes the blade, still includes air regulation mechanism.

Description

Harvester and screening mechanism for same

The technical field is as follows:

the utility model relates to a harvester especially relates to a screening mechanism of harvester.

Background art:

the harvester is used as a tool for modern agricultural production and is an integrated machine for harvesting crops. Can be used for harvesting grain crops such as paddy, wheat and the like, and can complete the harvesting operation of harvesting, threshing, separating, screening and bagging in one step.

The existing small-sized harvester generally comprises a straw pulling feeding part, a threshing and screening part, a collecting part and the like. The grain pulling and feeding part is used for cutting and pulling the crops from the land, the crops can be manually harvested and accumulated in the field, then the threshing machine is used for carrying out hand-held threshing, the threshing and screening part can enable grains to fall off from the straws and carry out screening and separation, and finally the separated grains are bagged through the collecting part.

In the existing harvester, part is not provided with a screening mechanism, and especially for a small-sized harvester, most of the small-sized harvester is not provided with the screening mechanism due to limited space. The grains are collected and packed after being threshed by the threshing mechanism, so that a plurality of sundries such as stones, straws, weeds and the like exist in the grains or the grains.

Most of the harvesters loaded with the screening mechanism are combine harvesters with high throughput, and the screening mechanism of the combine harvesters mainly adopts the existing common screen to carry out up-and-down vibration screening, so that the screening effect is still poor, and impurities still exist in the screened grains or grains. In order to achieve a better screening effect, a multi-channel screening mode is adopted for part of the combine harvesters, namely crops such as grains are collected after the first screening is finished, the grains after the first screening are sent to the screening mechanism again through the auger for secondary screening, and even three-channel screening is possible, so that the impurity content of the combine harvester is up to 2.0%.

However, for a small-sized harvester, there is not enough space for arranging the screening mechanism, or the screening mechanism is arranged, but the screening channel is too short to carry out screening for many times, so that the crop is harvested by the small-sized harvester, the final impurity rate of the processed crop is greatly higher than that of the combine harvester, and the impurity rate standard of the small-sized harvester is 7.0% according to the existing standard.

However, most farmers, especially farmers in the southwest region, cannot or cannot conveniently use large-scale combine harvesters due to geographical restrictions, but only small-scale harvesters can be used, but the small-scale harvesters have a high impurity rate, and crops harvested by the small-scale harvesters need to be subjected to impurity removal treatment again before being sold. Therefore, a small-sized harvester which can greatly reduce the impurity content and avoid the cost increase and labor increase caused by impurity removal treatment is urgently needed.

The utility model has the following contents:

an object of the utility model is to provide a screening mechanism of harvester that screening effect is good, that contains miscellaneous rate low.

In order to achieve the above object, the present invention is realized as follows: the utility model provides a screening mechanism for harvester, includes the casing be divided into screening district and lower collecting area in the casing, go up screening district with cut apart through the reciprocating sieve between the lower collecting area the upper portion in last screening district still is provided with the mechanism that induced drafts, its characterized in that: the reciprocating sieve is connected with eccentric wheel motion, the front end of reciprocating sieve is located the sharp slide, the sharp slide is greater than the inclination of reciprocating sieve by preceding tilt up backward and inclination, screening mechanism is provided with the screen cloth, be provided with multirow oblique ascending cockscomb structure grizzly strip on the screen cloth, the mechanism of induced drafting includes actuating mechanism and fan, the fan includes the blade, still includes air regulation mechanism.

The screening mechanism that above-mentioned mode set up, its reciprocating sieve is circular motion at the rear end for the motion of screening in-process, and the front end is linear motion, make cereal filter the mode of upwards throwing backward on the reciprocating sieve, even make cereal shake the screening at the in-process that upwards climbs, and the in-process that upwards climbs still has the dogtooth on the cockscomb structure grating to avoid its gliding, still can carry out the screening many times at the in-process of vibrations next time, and then totally discharge the debris in cereal or the grain, only leave clean cereal or the grain enters into next process, and the mechanism that induced drafts can suck away the impurity in the cereal at reciprocating sieve upwards backward screening in-process, reach good screening effect.

Preferably, the left and right sides of the vibrating screen are screen side plates, the conveying mechanism and the screening mechanism are fixed on the screen side plates, the rear ends of the screen side plates are connected with the eccentric wheel motion mechanism, and the front ends of the screen side plates are located in a slide way arranged on the shell in a sliding mode through bearings arranged at the support shaft and the two ends of the shaft of the screen frame.

Preferably, the left and right sieve side plates are fixedly connected with mounting plates for an eccentric wheel movement mechanism respectively, the two mounting plates are provided with mounting holes respectively, bearings are mounted in the mounting holes, and eccentric shafts are arranged on central rotating plates of the two bearings and connected with the movement mechanism.

Preferably, the screen bars are arranged transversely, the screen mesh is formed by transversely penetrating the screen bars through a plurality of screen bar steel wires and fixing the screen bars on the screen side plate, and a plurality of convex teeth protruding upwards are longitudinally arranged on the screen bars.

Preferably, the teeth are inclined with long sides and short sides, and all the teeth are uniformly inclined upwards.

In order to further improve the screening effect, the conveying mechanism comprises a conveying plate, the conveying plate comprises a plate body, the plate body is consistent with the inclination direction of the screen, and a plurality of rows of convex teeth are transversely arranged on the conveying plate.

Preferably, nearly screen cloth one side of board body is provided with decurrent down folded plate the eminence border of screen cloth is provided with decurrent back plate, down the folded plate with the back plate inclines in opposite directions and forms the aggregate bin with the V type bottom shell that the district lower part of gathering materials set up the lower part still is provided with the translation auger in the aggregate bin.

Preferably, the upper edges of the two screen side plates of the vibrating screen are connected with flexible strips, and flexible parts in contact with the shell are arranged on the front side and the rear side of the vibrating screen. Wherein through the flexible piece that sets up around, can make the last screening district of screening mechanism constitute a space that seals relatively, and then make the mechanism that induced drafts can better play a role.

Preferably, the air volume adjusting mechanism comprises a blade adjusting disk assembly and a blade mounting disk assembly, the blade adjusting disk assembly is connected with an inner shaft, the blade mounting disk assembly is connected with a hollow outer shaft, the inner shaft is positioned in the hollow outer shaft and can move axially relative to the hollow outer shaft, and the blades are rotatably arranged on the blade mounting disk assembly and connected with the blade adjusting disk assembly through adjusting pieces. The air suction mechanism arranged in the mode has a compact structure, and can directly realize the adjustment of the position of the blade by adjusting the axial relative position of the inner shaft and the hollow outer shaft, thereby realizing the adjustment of the air quantity.

To further increase the reliability, the upper part of the inner shaft is screwed to the upper part of the hollow outer shaft, and the threaded section of the inner shaft extends out of the hollow outer shaft and is provided with an adjusting nut thereon.

Preferably, the driving mechanism comprises a driving shaft, one end of the driving shaft is provided with a driving bevel gear, and a driven bevel gear in meshing transmission with the driving bevel gear is fixedly arranged on the hollow outer shaft; a support shell is arranged outside the driving shaft, a seat body used for protecting the driven bevel gear is arranged outside the hollow outer shaft, and the seat body is fixedly connected with the support shell.

Preferably, the blade mounting disc assembly comprises a mounting cover body fixedly connected with the lower part of the hollow outer shaft, the blade adjusting disc assembly comprises an adjusting cover body fixedly connected with the lower part of the inner shaft, and the adjusting cover body is positioned in the mounting cover body; the outer ring of the installation cover body is provided with a blade positioning hole, the outer ring of the adjusting cover body is provided with a blade adjusting hole, the blade positioning hole is arranged with the adjusting piece arranged between the blade adjusting holes, the blade is provided with an installation shaft, the installation shaft penetrates through the blade positioning hole and is fixedly connected with one end of the adjusting piece, and the other end of the adjusting piece is movably connected with the blade adjusting hole.

Furthermore, the adjusting piece is a plate body, one end of the adjusting piece is provided with a blade mounting hole, a through pin hole is formed in the hole wall, and the other end of the adjusting piece is provided with a U-shaped groove with an opening towards the other side face.

Furthermore, a guide shaft sleeve is fixedly arranged on the blade positioning hole, the mounting shaft of the blade penetrates through the guide shaft sleeve and is arranged in the mounting hole of the adjusting part, a pin is further arranged to penetrate through a pin hole of the mounting hole and a pin hole formed in the mounting shaft, and the mounting shaft and the guide shaft sleeve are in clearance fit.

Furthermore, an adjusting nail is arranged in the blade adjusting hole, the adjusting nail penetrates through the adjusting hole from inside to outside and is located in the U-shaped groove, and the adjusting nail can slide in the U-shaped groove.

For further improvement of reliability, the outer wall of the lower portion of the hollow outer shaft is provided with an external spline, the external spline is connected with a flange with an internal spline in a matched mode and fixed through a clamping ring, and the mounting cover body is fixedly connected with the flange.

In order to further improve the screening effect and improve the use reliability of the screening mechanism, the edge of the blade is close to the highest part of the vibrating screen.

A harvester, including above-mentioned screening mechanism.

In addition, further explain, in the utility model, "preceding", "back", "left" and "right" in with the material screening time mobile direction as the standard, the utility model provides a material is by preceding flowing backward. Meanwhile, for the harvester of the utility model, the advancing direction of the harvester is front. And the front-back direction is the longitudinal direction and the left-right direction is the transverse direction.

Has the advantages that:

1. adopt the utility model discloses a screening mechanism of harvester can treat the cereal or the grain of screening and carry out the short time and filter fast, gets rid of the impurity in cereal or the grain, reaches good screening effect.

2. The trash content of the combine harvester standard is 2.0 percent, and the small-sized harvester standard is 7.0 percent. The screening mechanism of the harvester of the utility model can reach the impurity rate of 2.0 percent of the standard of the combine harvester.

3. The utility model discloses not only can reach the miscellaneous rate that contains of combine standard, more importantly, the screening mechanism of this application is used for small-size harvester, and its occupation space is very little for combine. The combine harvester needs to rely on a large space to set the impurity containing rate which can be achieved by long screening channels and multi-channel screening, the application can achieve the purpose through an ingenious structural design, the space is greatly saved, and the small-sized harvester can also achieve the impurity containing rate of the combine harvester.

4. In addition, the impurity rate of the large-sized harvester which reaches 2.0% can be achieved through long-time multi-channel screening, and the screening mechanism of the application can reach the impurity rate of 2.0% only through one-step screening, so that the screening time is greatly reduced compared with that of the combine harvester, and the rapid screening can be realized.

5. The air volume of the air suction mechanism of the screening mechanism can be adjusted by adopting a pure mechanical means, the air suction mechanism can be adjusted at any time according to the treatment capacity, the grain type and the like of the screening mechanism, and the screening effect is improved. And through the arrangement modes of the inner shaft and the outer shaft, the driving mechanism and the like, the occupied space of the screening mechanism is reduced, and the screening mechanism can be widely applied to small harvesters.

Description of the drawings:

FIG. 1 is a view of a serrated screen bar;

FIG. 2 is a front view of a shaker;

FIG. 3 is a cross-sectional view E-E of FIG. 2;

FIG. 4 is a front view of the screening mechanism;

FIG. 5 is a front view of the suction mechanism;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a front view of a vane regulator disk assembly;

FIG. 8 is a cross-sectional view A-A of FIG. 7;

FIG. 9 is a front view of the blade mounting plate assembly;

FIG. 10 is a cross-sectional view B-B of FIG. 9;

FIG. 11 is a bottom view of the blade mounting plate assembly;

FIG. 12 is a top view of the adjustment member;

FIG. 13 is a front view of the adjustment member;

FIG. 14 is a bottom view of the suction mechanism;

FIG. 15 is a front view of the screening mechanism;

FIG. 16 is a cross-sectional view of FIG. 15;

FIG. 17 is a left side view of FIG. 15;

the specific implementation mode is as follows:

the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or replacements within the basic spirit of the embodiments still fall within the scope of the present invention claimed in the claims.

Example 1: as shown in fig. 1 to 17, a screening mechanism for a harvester includes a housing 133, which is divided into an upper screening area 134 and a lower collecting area 135, the upper screening area and the lower collecting area are separated by a vibrating screen 1, and an air suction mechanism 100 is further provided on the upper portion of the upper screening area.

Wherein, the reciprocating sieve is by preceding tilt up backward and include conveying mechanism in the front and the screening mechanism in the back, the rear end and the eccentric wheel motion of reciprocating sieve are connected, the front end of reciprocating sieve is located sharp slide, sharp slide is greater than the inclination of reciprocating sieve by preceding tilt up backward and inclination, screening mechanism is provided with the screen cloth.

Be provided with multirow ascending cockscomb structure grizzly strip in slant on the screen cloth, induced draft mechanism includes actuating mechanism and fan, the fan includes the blade, still includes air regulation mechanism.

The screening mechanism that above-mentioned mode set up, its reciprocating sieve is circular motion at the rear end for the motion of screening in-process, and the front end is linear motion, make cereal filter the mode of upwards throwing backward on the reciprocating sieve, even make cereal shake the screening at the in-process that upwards climbs, and the in-process that upwards climbs still has the dogtooth on the cockscomb structure grating to avoid its gliding, still can carry out the screening many times at the in-process of vibrations next time, and then totally discharge the debris in cereal or the grain, only leave clean cereal or the grain enters into next process, and the mechanism that induced drafts can suck away the impurity in the cereal at reciprocating sieve upwards backward screening in-process, reach good screening effect.

Example 2: as shown in fig. 1 to 17, a screening mechanism for a harvester comprises a housing 133, the housing is divided into an upper screening area and a lower collecting area, the upper screening area and the lower collecting area are separated by a vibrating screen, and an air suction mechanism is further arranged at the upper part of the upper screening area.

Wherein, the reciprocating sieve is by preceding tilt up backward and include conveying mechanism in the front and the screening mechanism in the back, the rear end and the eccentric wheel motion of reciprocating sieve are connected, the front end of reciprocating sieve is located sharp slide, sharp slide is greater than the inclination of reciprocating sieve by preceding tilt up backward and inclination, screening mechanism is provided with the screen cloth.

The vibrating screen 1 comprises a supporting frame body, the left side and the right side of the supporting frame body are screen side plates, the conveying mechanism and the screening mechanism are fixed on the screen side plates, the rear ends of the screen side plates are connected with an eccentric wheel movement mechanism, and the front ends of the screen side plates are located in a slide way arranged on the shell body in a sliding mode through bearings arranged at the supporting shafts of the screen frame and the two ends of the shaft.

Screening mechanism includes screen cloth 2, the screen cloth is installed on the sieve curb plate, the screen cloth sets up and is in along vertical tilt up be provided with multirow cockscomb structure grizzly strip on the screen cloth. Wherein, the screen cloth is from the preceding upwards slope setting of backward.

The screen cloth 2 includes along the cockscomb structure grating 21 of vertical setting, the cockscomb structure grating is a plurality of and transverse arrangement, passes through many grating steel wires 22 traversing the cockscomb structure grating is fixed form on the support frame body the screen cloth, the particle size decision of the grain that cockscomb structure grating and grating steel wire were screened according to the reality is decided to the arrangement density of cockscomb structure grating and grating steel wire, can adjust, the length of cockscomb structure grating can set up according to concrete space. Furthermore, a plurality of convex teeth 23 protruding upwards are arranged on the serrated screen bars along the longitudinal direction. This forms a plurality of rows of laterally upwardly projecting teeth.

In the present embodiment, the teeth 23 are inclined to have long and short sides, and all the teeth are uniformly inclined upward. And a rounding off angle can be arranged between the short edge of the front convex tooth and the long edge of the back convex tooth which are arranged along the longitudinal direction, or the rounding off angle is not required.

The conveying mechanism is consistent with the inclination direction of the screen and is connected with the lower part of the screen, the conveying mechanism is used for conveying grains or grains to be screened onto the screen, and a common plate body, a belt and the like can be adopted as the conveying mechanism.

In this embodiment, the conveying mechanism 3 comprises a conveying plate comprising a plate body 31 which is aligned with the inclination of the screen and on which a plurality of rows of teeth 32 are transversely arranged.

Therefore, when grains or grains enter the screen to be screened, the grains or grains can be collected in advance, the grains or grains are prevented from directly falling on the screen and falling into the collecting bin below without being screened, and the screening effect can be further improved.

In another embodiment of this embodiment, a downward folded plate 33 is provided on the side of the panel body 31 near the screen, a downward rear panel 12 is provided on the high edge of the screen, and the downward folded plate and the rear panel are inclined to each other. The purpose of setting up like this is in order to make the whereabouts position of cereal or grain through the screening more concentrated, is convenient for get into next process.

In addition, as another embodiment of this embodiment, an upward folded plate 34 may be further disposed on the side of the plate body far from the screen mesh, and the upward folded plate is disposed to facilitate the matching with the feeding hole of the screening mechanism and the feeding. Certainly also can not set up the folded plate, directly set up the feed inlet that just faces conveying mechanism through the casing of screening mechanism, reach good feeding effect.

In addition, the high position of the vibrating screen is connected with a cam motion mechanism 5, and the low position of the vibrating screen is arranged in a slide way of the shell in a sliding way. Specifically, the method comprises the following steps: regarding the eccentric shaft motion mechanism, the two screen side plates of the vibrating screen are respectively fixedly connected with a mounting plate 51 for the eccentric shaft motion mechanism, and of course, the mounting plate can also be integrally formed with the two screen side plates. The two mounting plates are respectively provided with a mounting hole, a bearing 52 is arranged in the mounting hole, and the central rotating plates of the two bearings are respectively provided with an eccentric shaft 53 which is connected with the driving mechanism 9. The lower of reciprocating sieve is exactly be provided with bank of screens back shaft 54 on two sieve curb plates of the left and right sides of conveying mechanism's lower, bank of screens back shaft axis body links firmly with conveying mechanism's this body of board, and the tip of bank of screens back shaft passes about the sieve curb plate and is connected with bearing 55 respectively, the bearing is located respectively 44 in the slide that the inside wall of casing set up, the slide tilt up sets up, and the inclination of slide is greater than the inclination of reciprocating sieve.

The power source of the driving mechanism is an engine on the harvester, and power transmission is carried out through a belt, a chain wheel, a gear or other modes.

Through the arrangement, when the eccentric shaft 53 is driven by the driving mechanism to rotate, the left and right sieve side plates are further driven to move, so that the high part of the vibrating sieve is in circular motion, the low part of the vibrating sieve is in linear motion in the slide way, and finally the whole vibrating sieve moves integrally. Make cereal or grain continuous upwards throw backward when reciprocating sieve motion, then fall down, reach the purpose of screening to because the special setting of screen cloth, can make cereal or grain can be from the front to the back on the screen cloth, from lower supreme screening many times, finally reach good screening effect. And in the screening process, the impurity is sucked out through the air suction mechanism 6, and the impurity which can not be sucked out by the air suction mechanism can be accumulated at the highest position of the screen.

In addition, the lower part of the shell is provided with a V-shaped bottom shell 45, and the lower plate, the lower folded plate and the V-shaped bottom shell form a material collecting bin. Wherein the V-shaped housing encloses the lower flap without touching, that is to say with its end opposite the plate body. And a flexible plate 14 is connected to the bottom of the lower plate, and the flexible plate is in contact with the V-shaped bottom shell. The flexible plate can be made of rubber. Therefore, all grains or grains can be guaranteed to fall into the collecting bin. The lower part of the V-shaped bottom shell is provided with a transverse translation auger 7, so that grains or grains in the collecting bin can be conveyed to the next procedure conveniently.

As another embodiment of this embodiment, a flexible strip 13 is connected to the two screen side plates of the vibrating screen along the upper edge. The flexible strip can be made of rubber.

As another embodiment of this embodiment, a flexible member, such as a rubber sheet, is disposed between the top of the front end and the top of the rear end of the vibrating screen and the casing, so that a relatively closed space is formed in the screening area, and the air suction mechanism is convenient to adsorb impurities in the material during screening.

The air suction mechanism 100 comprises a driving mechanism 101 and a fan 102, wherein the fan comprises a blade 103 and an air volume adjusting mechanism 104. The air quantity adjusting mechanism adjusts the air quantity by adjusting the angle of the fan blade.

The air volume adjusting mechanism comprises an inner blade adjusting disk assembly 105 and an outer blade mounting disk assembly 106. The vane regulating disc assembly is connected to an inner shaft 107, the vane mounting disc assembly is connected to an outer hollow shaft 108, the inner shaft is located within the outer hollow shaft and is axially movable relative to the outer hollow shaft, and the vanes are rotatably mounted on the vane mounting disc assembly and are connected to the vane regulating disc assembly via an adjusting member 109.

In this embodiment, the upper portion of the inner shaft is threadedly coupled to the upper portion of the hollow outer shaft, and the threaded section of the inner shaft extends out of the hollow outer shaft and is provided with an adjustment nut 110 thereon, which may or may not abut against an end surface of the hollow outer shaft for adjustment. By rotating the adjusting nut, the inner shaft can move up and down, so that the adjusting piece can rotate, the blade is driven to rotate by the rotation of the adjusting piece, and finally the angle of the blade is adjusted to adjust the air volume.

In this embodiment, the driving mechanism includes a driving shaft 111, a driving bevel gear 112 is disposed at one end of the driving shaft, and a driven bevel gear 113 that is engaged with the driving bevel gear is fixedly disposed on the hollow outer shaft. And the other end of the driving shaft can be connected with power from an engine of the harvester so as to drive the driving shaft to rotate. In this embodiment, a pulley 114 is connected to the other end of the driving shaft, and the driving shaft is driven to rotate by the pulley.

As another embodiment of this embodiment, a support housing 115 is disposed outside the driving shaft, and a seat body 116 for protecting the driven bevel gear is disposed outside the hollow outer shaft, and the seat body is fixedly connected to the support housing. The pedestal all is equipped with the through-hole from top to bottom, the hollow outer axle passes the through-hole, and adopts bearing 117 to be connected hollow outer axle and pedestal in two through-hole departments about, adopts sealing member 118 to seal two bearings in addition again. Similarly, bearings 117 are also arranged on the left side and the right side in the support shell for connecting with the driving shaft, and the side opening of the seat body is used for installing a bevel gear pair and is connected with the shell.

And the air suction mechanism is fixedly connected with the seat body of the air suction mechanism and the shell of the screening mechanism through two fixing plates 121 arranged on two sides of the seat body. An adjusting window is further arranged on the shell above the air volume adjusting mechanism of the air suction mechanism, and a covering shield plate 122 is arranged outside the adjusting window.

In addition, the blade mounting disk assembly 106 includes a mounting cover 119 fixedly attached to the lower portion of the hollow outer shaft, and the blade adjusting disk assembly 105 includes an adjusting cover 120 fixedly attached to the lower portion of the inner shaft, the adjusting cover being located within the mounting cover; the outer ring of the mounting cover body is provided with a blade positioning hole 123, the outer ring of the adjusting cover body is provided with a blade adjusting hole 124, the blade positioning hole and the blade adjusting hole are provided with the adjusting piece 109, the blade is provided with a mounting shaft 125, the mounting shaft penetrates through the blade positioning hole and is fixedly connected with one end of the adjusting piece, and the other end of the adjusting piece is movably connected with the blade adjusting hole. The adjusting piece 109 is a plate body, one end of the adjusting piece is provided with a blade mounting hole 126, a through pin hole 127 is arranged on the hole wall of the mounting hole, and the other end of the adjusting piece is provided with a U-shaped groove 128 which is opened towards the other side face. The blade positioning hole is provided with a guide shaft sleeve 129, the installation shaft of the blade penetrates through the guide shaft sleeve and is arranged in the installation hole 126 of the adjusting part, a pin is further arranged to penetrate through a pin hole of the installation hole and a pin hole formed in the installation shaft, and the installation shaft and the guide shaft sleeve are in clearance fit. An adjusting nail 130 is arranged in the blade adjusting hole 124, penetrates through the adjusting hole from inside to outside and is positioned in the U-shaped groove, and the adjusting nail can slide in the U-shaped groove.

As another embodiment of this embodiment, the outer spline is disposed on the outer wall of the lower portion of the hollow outer shaft, the outer spline is engaged with the flange 131 with the inner spline and fixed by the snap ring 132, and the mounting cover is fixedly connected to the flange.

When the screening mechanism of the embodiment is adopted, materials to be screened, such as grains and corns, are threshed and then fed through the feeding port of the feeding end of the screening mechanism, the materials fall onto the conveying mechanism of the vibrating screen in the shell of the screening mechanism, the vibrating screen is driven by the driving mechanism, the high portion of the vibrating screen performs circular motion and drives the low portion to perform linear motion in the slide way, and the inclination of the slide way is larger than that of the vibrating screen. Therefore, the materials move backwards and upwards under the action of the vibrating screen, the short part of the vibrating screen gradually climbs towards the high part, impurities in the materials in the climbing process can be sucked away by the air suction mechanism, the screened grains and the like can fall into a blanking area through the screen, the materials can be screened once when the vibrating screen moves once, the materials are screened until the materials climb to the highest position, and the screening is finished even when the materials to be screened are few in climbing. And the material falling into the blanking area is moved to the next working procedure by the translation packing auger.

Sundries in grains or grains are sucked away through the air suction mechanism in the screening process, and the air quantity can be stopped and adjusted according to the screening quantity, the grain types and the like in the using process. When the wind-driven generator is adjusted, the generator needs to be stopped, the covering shielding plate is uncovered, then the adjusting nut is manually or by adopting a tool to go deep into the adjusting window to rotate, so that the inner shaft rises or falls, the blade adjusting disc component rises or falls, the angle of the blade is changed through the adjusting component, and finally the purpose of adjusting the wind quantity is achieved.

If more impurities are screened out and accumulated on the top of the screen, or the impurities with larger volume or heavier weight are accumulated on the top of the screen, the blades can shovel the accumulated impurities in the rotating process, suck the impurities out through the air suction mechanism and blow the impurities out through the adjusting window.

Adopt the pure mechanical mode of adoption of this embodiment to carry out air regulation to the mechanism that induced drafts, simple structure convenient to use improves the screening effect, sieves debris in cereal or the grain as far as possible and avoids cereal or grain to be blown away by the mechanism that induced drafts as far as possible.

By adopting the screening mechanism of the embodiment, grains or grains to be screened can be screened for a plurality of times for a long time, impurities in the grains or the grains are removed, a good screening effect is achieved, and the impurity content is only 2.0%. Through the slope setting of screen cloth, can reduce occupation space when guaranteeing the screening effect for can use on small-size harvester the utility model discloses a screening mechanism. The structure is reliable and the service life is long.

A small-size harvester includes foretell screening mechanism.

Claims (18)

1. The utility model provides a screening mechanism for harvester, includes the casing be divided into screening district and lower collecting area in the casing, go up screening district with cut apart through the reciprocating sieve between the lower collecting area the upper portion in last screening district still is provided with the mechanism that induced drafts, its characterized in that: the reciprocating sieve is connected with eccentric wheel motion, the front end of reciprocating sieve is located the sharp slide, the sharp slide is greater than the inclination of reciprocating sieve by preceding tilt up backward and inclination, screening mechanism is provided with the screen cloth, be provided with multirow oblique ascending cockscomb structure grizzly strip on the screen cloth, the mechanism of induced drafting includes actuating mechanism and fan, the fan includes the blade, still includes air regulation mechanism.

2. A screening mechanism for a harvester as in claim 1, wherein: the vibrating screen is characterized in that the left side and the right side of the vibrating screen are screen side plates, the conveying mechanism and the screening mechanism are fixed on the screen side plates, the rear ends of the screen side plates are connected with the eccentric wheel moving mechanism, and the front ends of the screen side plates are located in a slide way arranged on the shell in a sliding mode through bearings arranged at the support shaft of the screen frame and the two ends of the shaft.

3. A screening mechanism for a harvester as in claim 2, wherein: the left and right sieve side plates are fixedly connected with mounting plates for an eccentric wheel movement mechanism respectively, the two mounting plates are provided with mounting holes respectively, bearings are mounted in the mounting holes, and eccentric shafts are arranged on central rotating plates of the two bearings and connected with the movement mechanism.

4. A screening mechanism for a harvester according to claim 2 or 3, wherein: the screen bars are arranged transversely and penetrate through the screen bars in the transverse direction through a plurality of screen bar steel wires and are fixed on the screen side plate to form the screen, and a plurality of convex teeth protruding upwards are longitudinally arranged on the screen bars.

5. A screening mechanism for a harvester as in claim 4, wherein: the convex teeth are inclined and all convex teeth are uniformly inclined upwards, and the convex teeth are provided with long edges and short edges.

6. A screening mechanism for a harvester as in claim 1, 2, 3 or 5, wherein: the conveying mechanism comprises a conveying plate, the conveying plate comprises a plate body, the plate body is consistent with the inclination direction of the screen, and a plurality of rows of convex teeth are transversely arranged on the conveying plate.

7. A screening mechanism for a harvester as in claim 6, wherein: the board body is provided with decurrent down folded plate on one side of nearly screen cloth the eminence border of screen cloth is provided with decurrent back plate, down the folded plate with the back plate inclines in opposite directions and forms the aggregate bin with the V type under casing that the district lower part of gathering materials set up the lower part still is provided with the translation auger in the aggregate bin.

8. A screening mechanism for a harvester as in claim 7, wherein: the upper edges of two screen side plates of the vibrating screen are connected with flexible strips, and flexible parts in contact with the shell are arranged on the front side and the rear side of the vibrating screen.

9. A screening mechanism for a harvester as in claim 8, wherein: the air volume adjusting mechanism comprises a blade adjusting disk assembly and a blade mounting disk assembly, wherein the blade adjusting disk assembly is arranged inside the air volume adjusting mechanism, the blade mounting disk assembly is arranged outside the air volume adjusting mechanism, the blade adjusting disk assembly is connected with an inner shaft, the blade mounting disk assembly is connected with a hollow outer shaft, the inner shaft is arranged inside the hollow outer shaft and can axially move relative to the hollow outer shaft, and the blades are rotatably arranged on the blade mounting disk assembly and are connected with the blade adjusting disk assembly through adjusting pieces.

10. A screening mechanism for a harvester as in claim 9, wherein: the upper part of the inner shaft is in threaded connection with the upper part of the hollow outer shaft, and the threaded section of the inner shaft extends out of the hollow outer shaft and is provided with an adjusting nut.

11. A screening mechanism for a harvester as in claim 10, wherein: the driving mechanism comprises a driving shaft, a driving bevel gear is arranged at one end of the driving shaft, and a driven bevel gear in meshing transmission with the driving bevel gear is fixedly arranged on the hollow outer shaft; a support shell is arranged outside the driving shaft, a seat body used for protecting the driven bevel gear is arranged outside the hollow outer shaft, and the seat body is fixedly connected with the support shell.

12. A screening mechanism for a harvester according to claim 9, 10 or 11, wherein: the blade mounting disc assembly comprises a mounting cover body fixedly connected with the lower part of the hollow outer shaft, the blade adjusting disc assembly comprises an adjusting cover body fixedly connected with the lower part of the inner shaft, and the adjusting cover body is positioned in the mounting cover body; the outer ring of the installation cover body is provided with a blade positioning hole, the outer ring of the adjusting cover body is provided with a blade adjusting hole, the blade positioning hole is arranged with the adjusting piece arranged between the blade adjusting holes, the blade is provided with an installation shaft, the installation shaft penetrates through the blade positioning hole and is fixedly connected with one end of the adjusting piece, and the other end of the adjusting piece is movably connected with the blade adjusting hole.

13. A screening mechanism for a harvester as in claim 12, wherein: the adjusting piece is a plate body, one end of the adjusting piece is provided with a blade mounting hole, a through pin hole is formed in the hole wall, and the other end of the adjusting piece is provided with a U-shaped groove with an opening towards the other side face.

14. A screening mechanism for a harvester as in claim 13, wherein: the blade positioning hole is fixedly provided with a guide shaft sleeve, the installation shaft of the blade penetrates through the guide shaft sleeve and is arranged in the installation hole of the adjusting part, a pin is further arranged to penetrate through the pin hole of the installation hole and the pin hole formed in the installation shaft, and the installation shaft and the guide shaft sleeve are in clearance fit.

15. A screening mechanism for a harvester according to claim 13 or 14, wherein: the blade adjusting hole is internally provided with an adjusting nail which penetrates through the adjusting hole from inside to outside and is positioned in the U-shaped groove, and the adjusting nail can slide in the U-shaped groove.

16. A screening mechanism for a harvester as in claim 15, wherein: the outer wall of the lower portion of the hollow outer shaft is provided with an external spline, the external spline is connected with a flange with an internal spline in a matched mode and fixed through a clamping ring, and the mounting cover body is fixedly connected with the flange.

17. A screening mechanism for a harvester as in claim 16, wherein: the blade edge is adjacent to the highest portion of the shaker.

18. A harvester, characterized by: a screening mechanism comprising any preceding claim.

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