CN210042794U - Harvester - Google Patents

Abstract

The utility model discloses a harvester, its characterized in that: including the frame rear is provided with power unit the place ahead of the power unit is provided with the driver's cabin the place ahead is for threshing mechanism and pull out standing grain mechanism in proper order, pull out standing grain mechanism front for pull out standing grain end, rear portion for the feeding end and with threshing mechanism's feed end intercommunication, threshing mechanism's rear portion one side is the output and the feed end of screening mechanism be connected, the rear of screening mechanism is the output and with connect the feed end of grain mechanism to be connected, screening mechanism with it is located driver's cabin one side to connect grain mechanism, the frame lower part is running gear and lower header mechanism. The utility model discloses a harvester compact structure, screening are effectual, and the trash content is low.

Description

Harvester

The technical field is as follows:

the utility model relates to a harvester especially relates to a speed change 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 rice, wheat and corn, and can complete harvesting, threshing and storing the grains in a centralized way at one time.

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 off and pulling up the cut grain from the land, or manually harvesting the crop in advance and accumulating the crop in the field, then picking up and threshing the crop by the harvester, the threshing and screening part can lead the grain to fall off from the straw and screen and separate the grain, and finally the grain separated by the collecting part is collected, packed or stored.

Chinese patent CN204014505U discloses a harvester, which comprises a cutting table, a cutting table divider, a conveying device, a chassis, a front chopper, a threshing cylinder and a caterpillar. Wherein, the conveying device is arranged between the header and the threshing cylinder and is used for conveying the ear parts of the crops gathered by the header to the threshing cylinder through the conveying device. It is clear from the drawings of the specification of this patent (see fig. 1) that the arrangement of the header at a relatively large distance from the threshing cylinder and the arrangement of the conveyor connecting the two is very long, which results in very high operational requirements for the structure of the conveyor, requires a relatively high reliability and requires a relatively high expenditure of power during operation. Even if the fault occurs, other problems still occur in the transportation process, such as defects of unsmooth operation, high power consumption, high fault rate and the like.

These are all caused by the unreasonable layout of the harvester, and the layout does not cause inconvenience in operation and use, and also causes the defects of large occupied space, loose structure, low reliability, flexible operation part and the like of the harvester.

The utility model has the following contents:

an object of the utility model is to provide a save space and convenient operation's harvester.

In order to achieve the above object, the present invention is realized as follows: a harvester, characterized by: including the frame rear is provided with power unit the place ahead of the power unit is provided with the driver's cabin the place ahead is for threshing mechanism and pull out standing grain mechanism in proper order, pull out standing grain mechanism front for pull out standing grain end, rear portion for the feeding end and with threshing mechanism's feed end intercommunication, threshing mechanism's rear portion one side is the output and the feed end of screening mechanism be connected, the rear of screening mechanism is the output and with connect the feed end of grain mechanism to be connected, screening mechanism with it is located driver's cabin one side to connect grain mechanism, the frame lower part is running gear and lower header mechanism. Through foretell setting mode, can carry out reasonable layout with used functional unit of harvester, compact structure has reduced occupation space to the operation is reliable flexible operation, convenience.

In order to further increase the operational reliability and save space, the driving platform comprises a seat, in front of and/or on one side of the seat is an operating platform, the power mechanism is arranged below the seat and comprises a power source, the output end of the power source is connected with the input end of the speed change mechanism, the output end of the speed change mechanism is connected with the middle power end through a transmission mechanism, the middle power end is connected with a threshing roller component of the threshing mechanism through a first-stage transmission system, the threshing roller component is connected with the transition roller component through a second-stage transmission system, the transition roller component is connected with a threshing auger component for threshing through a third-stage transmission system, the threshing auger assembly is connected with the feeding auger assembly of the grain pulling mechanism through a fourth-stage transmission system, and the feeding auger assembly is connected with the grain pulling assembly of the grain pulling mechanism through a fifth-stage transmission system.

In order to further improve the operation reliability, the speed change mechanism comprises a timing clutch and a reverse-time clutch, the timing clutch and the reverse-time clutch are arranged in parallel in a reverse direction, the input end of the timing clutch is connected with input power, the input end of the timing clutch is provided with a reverse-time reversing driving gear, the input end of the reverse-time clutch is provided with a reverse-time reversing driven gear in meshing transmission with the reverse-time reversing driving gear, the output end of the timing clutch is provided with a timing power output gear, the output end of the reverse-time clutch is provided with a reverse-time power output gear, the timing power output gear and the reverse-time power output gear are in meshing transmission with a primary driven gear, and the speed change mechanism is further provided with a gear shift assembly which can drive the timing clutch or the reverse-time clutch.

Preferably, the timing clutch and the reverse-time clutch both comprise clutch plate assemblies, the clutch plate assemblies of the timing clutch act on the timing power output gear, the clutch plate assemblies of the reverse-time clutch act on the reverse-time reversing driven gear, the reverse-time reversing driving gear is in transmission connection with a clutch shaft of the timing clutch, and the reverse-time power output gear is in transmission connection with the clutch shaft of the reverse-time clutch.

In order to further improve the working efficiency, the threshing mechanism comprises a threshing bin, the threshing bin is longitudinally divided into an upper threshing area and a lower blanking area, the upper threshing area and the lower blanking area are separated by a screen, a feed inlet of the upper threshing area is communicated with a discharge outlet of the grain pulling mechanism, a discharge outlet of the lower blanking area is communicated with a feed inlet of the screening mechanism, and the screen is detachably clamped and connected through a clamping groove formed in the wall of the threshing bin; the threshing bin is transversely arranged in a cylindrical shape and is vertically arranged in a split manner, the threshing bin is divided into a bin body at the lower half part and a cover body at the upper half part, the bin body and the screen form the lower blanking area, and the cover body and the screen form the upper threshing area; the clamping groove is axially arranged and comprises a fixed groove arranged on one side of the bin body and a movable groove formed by buckling the cover body and the bin body.

In order to further enable feeding to be smoother, the lower portion of the bin body is V-shaped, the fixing grooves are formed in the V-shaped side walls, and the feeding hole is formed in the V-shaped side walls.

In order to further improve the screening effect, the screening mechanism comprises a vibrating screen, the vibrating screen comprises a support frame body and a screen, the screen is installed on the support frame body and is arranged obliquely upwards along the longitudinal direction, the screen comprises a plurality of zigzag screen bars arranged along the longitudinal direction, the zigzag screen bars are arranged transversely, a plurality of screen bar steel wires transversely penetrate through the zigzag screen bars and are fixed on the support frame body to form the screen, and a plurality of convex teeth protruding upwards are arranged on the zigzag screen bars along the longitudinal direction; the support frame body comprises screen side plates arranged on the left side and the right side of the screen, the end parts of the screen bar steel wires are connected to the screen side plates, a conveying mechanism connected with the screen is further arranged at the lower position of the screen, and 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 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.

In order to further improve the screening effect, the screening mechanism comprises a shell with a feeding hole, the vibrating screen is arranged in the shell and divides the inner area of the shell into an upper screening area and a lower material collecting area, the feeding hole is opposite to the conveying mechanism, the high position of the vibrating screen is connected with an eccentric wheel movement mechanism, the low position of the vibrating screen is arranged in a slide way of the shell in a sliding manner, the slide way is arranged on the inner wall of the shell and is inclined upwards, the inclination of the slide way is greater than that of the vibrating screen, and the lower part of the screen is also provided with a material collecting bin; the vibrating screen is characterized in that mounting plates for an eccentric wheel motion mechanism are fixedly connected to two screen side plates of the vibrating screen respectively, mounting holes are formed in the two mounting plates respectively, bearings are mounted in the mounting holes, eccentric shafts are arranged on central rotating plates of the two bearings, and the eccentric shafts are connected with the motion mechanism.

In order to further improve the screening effect, an air suction mechanism is arranged above the vibrating screen, the air suction mechanism comprises a driving mechanism and a fan, the fan comprises blades and an air volume adjusting mechanism, the air volume adjusting mechanism comprises a blade adjusting disk assembly and a blade mounting disk assembly, the blade adjusting disk assembly is arranged outside the blade 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 positioned 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; 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.

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; a blade positioning hole is formed in the outer ring of the mounting cover body, a blade adjusting hole is formed in the outer ring of the adjusting cover body, the adjusting piece is arranged between the blade positioning hole and the blade adjusting hole, the blade is provided with a mounting shaft, 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 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 which is opened towards the other side face; a guide shaft sleeve is fixedly arranged on the blade positioning hole, a 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 also arranged to penetrate through a pin hole of the mounting hole and a pin hole arranged on the mounting shaft, and the mounting shaft and the guide shaft sleeve are in clearance fit; 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.

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 harvester, its compact structure, reliability are high, and the probability of breaking down is little to it can also energy saving.

Additionally, the utility model discloses a harvester, occupation space is little, power unit is rationally distributed, can drive each functional mechanism fast accurately, uses the flexibility high.

2. The utility model discloses a threshing mechanism of harvester directly opens the lid and can take out the screen cloth, changes or dredge labour saving and time saving to the screen cloth. The longitudinal length of the harvester is shortened, the reliability of the structure of the harvester is improved, the smooth feeding of crops at the feeding port can be ensured, and the blockage is not easy to occur.

3. 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.

4. 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.

5. 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.

6. 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.

7. The utility model discloses a speed change mechanism of harvester has realized advancing and reversing of harvester through two separation and reunions, has saved the space of gearbox to operating mechanism can also be simplified through such setting.

Description of the drawings:

fig. 1 is a left side view of the harvester of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a right side view of the grain pulling mechanism and the threshing mechanism;

FIG. 4 is a left side view of the grain pulling mechanism and the threshing mechanism (without the protective cover);

FIG. 5 is a dual clutch drive configuration of the shifting mechanism;

FIG. 6 is a side view of FIG. 4;

FIG. 7 is a structural view of the shifting mechanism;

fig. 8 is an isometric view of a threshing mechanism;

fig. 9 is an isometric view of the threshing mechanism (without the cover);

FIG. 10 is a cross-sectional view of the screening mechanism;

FIG. 11 is a view of a vibrating screen configuration;

FIG. 12 is a cross-sectional view of the air aspiration device of the screening mechanism;

fig. 13 is a structural view of an adjusting member of the air suction device.

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 (b): as shown in fig. 1-13, a harvester, including frame 1 the frame rear is provided with power unit 2 power unit the place ahead is provided with driver's cabin 3 the driver's cabin the place ahead is threshing mechanism 4 and pulling out standing grain mechanism 5 in proper order, pull out standing grain mechanism front for pull out standing grain end, rear portion be the feeding end and with threshing mechanism's feed end intercommunication, threshing mechanism's rear portion one side be the output and with screening mechanism 6 the feed end be connected, screening mechanism's rear be the output and with connect the feed end of grain mechanism 7 to be connected, screening mechanism with it is located driver's cabin one side to connect grain mechanism, the frame lower part is running gear 8 and lower header mechanism 9.

The driving cab 3 includes a seat 301, an operation table 302 is provided in front of and/or on one side of the seat, the power mechanism 2 is provided below the seat, and the power mechanism includes a power source, which is generally an engine or a diesel engine. The output end of the power source is connected with the input end of the speed change mechanism 201, and the output end of the speed change mechanism drives the walking mechanism. And the power supply still is provided with multi-functional output, the multi-functional output of power supply is connected with the middle part power end 202 that sets up at the frame middle part, the middle part power end is connected with threshing cylinder subassembly 401 of threshing mechanism 4 through first order transmission 203, threshing cylinder subassembly passes through second transmission 204 and is connected with transition cylinder subassembly, transition cylinder subassembly passes through third transmission 205 and is connected with threshing mechanism's threshing auger subassembly 402, threshing auger subassembly passes through fourth transmission 206 and is connected with the feeding auger group 501 spare of pulling out standing grain mechanism 5, the feeding auger subassembly passes through fifth transmission 207 and is connected with pulling out standing grain mechanism's pulling out standing grain subassembly 502.

Wherein the transmission is a common transmission component, such as a belt transmission component, a chain transmission component, a gear transmission component, and the like.

In this embodiment, the middle power end 202 includes a driving shaft, the threshing cylinder assembly includes a threshing cylinder, and the threshing cylinder assembly further includes a housing through which the threshing cylinder passes. The first transmission system 203 comprises a first-stage driving belt pulley arranged at one end of the driving rotating shaft, a first-stage driven belt pulley arranged at one side of the threshing cylinder outside the shell, and a first-stage transmission belt arranged between the first-stage driving belt pulley and the first-stage driven belt pulley, wherein a first-stage tension pulley is further arranged on the first-stage transmission belt. The first-level tensioning wheel is connected with the driving rotating shaft through a sheet metal part, the shell is welded or fixedly connected with another sheet metal part through a screw, a screw is installed on the sheet metal part on the shell, the screw is connected with the first-level tensioning wheel through a spring, when the first-level tensioning wheel is loosened, the first-level transmission belt cannot drive the belt pulley to rotate, the first-level tensioning wheel can be adjusted through the screw, and the belt is guaranteed to be kept in a tensioning state through position adjustment of the tensioning wheel.

The transition roller assembly 208 comprises a transition roller, the second-stage transmission system comprises a second-stage driving belt pulley arranged on the other side of the threshing roller, a second-stage driven belt pulley arranged on the transition roller and a second-stage transmission belt arranged between the second-stage driving belt pulley and the second-stage driven belt pulley, and a second-stage tension pulley is further arranged on the second-stage transmission belt. Similarly, the position of the secondary tension wheel can be adjusted through a screw rod and a spring arranged on the shell, and the tension of the secondary transmission belt is guaranteed.

Threshing auger subassembly 402 is including threshing auger cylinder, third level drive train is including setting up tertiary drive sprocket on the transition cylinder, setting are in tertiary driven sprocket and setting on the threshing auger cylinder are in tertiary drive chain between tertiary drive sprocket and the tertiary driven sprocket.

Feeding auger subassembly 501 is including feeding auger cylinder, the fourth level drive system is including setting up four levels drive sprocket on the threshing auger cylinder, set up four levels driven sprocket and the setting on feeding auger cylinder are in four levels drive chain between four levels drive sprocket and the four levels driven sprocket.

The straw pulling assembly 502 comprises a straw pulling roller, the fifth-stage transmission system comprises a fifth-stage driving belt pulley arranged on the feeding auger roller, a fifth-stage driven belt pulley arranged on the straw pulling roller and a fifth-stage transmission belt arranged between the fifth-stage driving belt pulley and the fifth-stage driven belt pulley, and a fifth-stage tension pulley is further arranged on the fifth-stage transmission belt. Similarly, the position of the five-stage tension pulley can be adjusted through a screw rod and a spring arranged on the shell, and the tension of the five-stage transmission belt is guaranteed.

As another embodiment of this embodiment, the foremost of the grain pulling mechanism is a lower cutter assembly 503, the lower cutter assembly includes a transversely arranged and movable blade, and the feeding auger roller is connected with the movable blade through a connecting rod assembly 209, so that the movable blade can move left and right to cut the straw and the like. The cutting knife assembly comprises a cutting knife assembly, a connecting rod assembly and a rocker arm seat, wherein the connecting rod assembly comprises a connecting rod, one end of the connecting rod is connected with a feeding auger roller, the other end of the connecting rod is connected with the rocker arm seat, the rocker arm seat is fan-shaped, the rocker arm seat is sleeved at the center and rotatably arranged on the lower cutting knife assembly, the connecting rod is fixedly connected with one side of a sector, and the other side of the sector is located in a sliding groove formed in the cutting knife. Through the arrangement, when the feeding auger roller rotates, the movable blade can be driven by the connecting rod assembly to slide left and right and be matched with the fixed blade for cutting.

In addition, the running mechanism 8 is a crawler belt arranged on two sides of the lower part of the frame, and the crawler belt is driven by a speed change mechanism of the power mechanism. The transmission mechanism 201 includes a timing clutch 211 and a reverse clutch 212, and the timing clutch and the reverse clutch are arranged in reverse parallel. The timing clutch and the reverse timing clutch are provided with clutch shafts, one side of each clutch shaft is provided with a clutch plate assembly, the clutch plate assembly comprises a clutch plate shell, a clutch plate, a clutch steel sheet and a double-clutch plate limiting plate are arranged in the clutch plate shell, a clutch opening and closing push plate is further arranged on the clutch shaft, a pressure spring and a pressure spring adjusting gasket are further arranged between the clutch opening and closing push plate and the clutch shafts, one end of the pressure spring abuts against a shaft shoulder of the clutch shaft provided with the clutch plate, the other end of the pressure spring abuts against the pressure spring adjusting gasket, pressure is applied to the clutch plate through the push plate, the clutch plate is compressed and is in transmission connection with the clutch shaft, and the clutch shaft can drive the clutch plate to rotate with the clutch plate shell. And the clutch on-off push disc can be also provided with a thrust ball bearing. In addition, the timing clutch and the reverse timing clutch are fixed on the box body by arranging a deep groove ball bearing on the clutch shaft in a single connection mode, and a thrust ball bearing is arranged outside the deep groove ball bearing at one end of the non-clutch plate assembly.

Wherein, the reverse parallel arrangement of the timing clutch and the reverse timing clutch means that: the right clutch and the clutch shaft of the reverse clutch are arranged in parallel, but the clutch plate assembly of the right clutch and the clutch plate assembly of the reverse clutch are arranged at different ends.

One end of the non-clutch plate assembly of the timing clutch is used as an input end, and one end of the clutch plate assembly is used as an output end. The input end of the timing clutch is connected with input power, the input end of the timing clutch is provided with a reverse time reversing driving gear Z1, the input end of the reverse time clutch is provided with a reverse time reversing driven gear Z2 in meshing transmission with the reverse time reversing driving gear Z1, the output end of the timing clutch is provided with a timing power output gear Z3, the output end of the reverse time clutch is provided with a reverse time power output gear Z4, the timing power output gear Z3 and the reverse time power output gear Z4 are in meshing transmission with a primary driven gear Z5, the timing clutch or the reverse time clutch can be driven by the gear shifting assembly 213.

The reverse timing driving gear Z1 is fixedly connected to the clutch shaft of the timing clutch, that is, when the timing clutch is powered, the reverse timing driving gear Z1 rotates synchronously. The reverse time reversing driven gear Z2 is connected with the clutch plate assembly of the reverse time clutch, namely when the clutch plate is not pressed by the clutch plate, the reverse time reversing driven gear Z2 and the clutch shaft of the reverse time clutch are in a power separation state, and the rotation of the clutch shaft can not drive the reverse time reversing driven gear Z2 to rotate. The timing power output gear Z3 is connected with the clutch plate component of the timing clutch, similarly, when the clutch engaging and disengaging push plate does not press the clutch plate component, the timing power output gear Z3 and the clutch shaft of the timing clutch are in a power separation state, and the rotation of the clutch shaft cannot drive the rotation of the timing power output gear Z3. The reverse power output gear Z4 is fixedly connected to the clutch shaft of the reverse clutch, that is, when the clutch shaft of the reverse clutch rotates, the reverse power output gear Z4 is driven to rotate synchronously.

The timing power output gear Z3 and the clutch plate shell are integrally arranged or fixedly connected, and the reverse reversing driven gear Z2 and the clutch plate shell of the reverse clutch are integrally arranged or fixedly connected. In the present embodiment, the timing power output gear Z3 is provided integrally with the timing clutch plate housing, and the reverse direction driven gear Z2 is provided integrally with the clutch plate housing of the reverse clutch.

As another embodiment of the present embodiment, the shift assembly 213 includes a shift shaft 214, on which a shift fork 215 is disposed, the shift fork having two shift plates, and the two shift plates are respectively engaged with the clutch shaft of the timing clutch and the clutch shaft of the reverse timing clutch and can act on the clutch plate assembly.

Particularly, slightly dislocation set around two declutch shift pieces, and two declutch shift pieces are as an organic whole, at the prong that the top of two declutch shift pieces set up as an organic whole, the prong free sleeve is in on the separation and reunion axle, still be provided with S type spout on the prong, be provided with the fixed pin on the declutch shift axle, the fixed pin is located in the S type spout.

In this embodiment, one of the shift fork plates is sleeved on the outer wall of the clutch engaging and disengaging push plate of the timing clutch, and the other shift fork plate is sleeved on the outer wall of the clutch engaging and disengaging push plate of the reverse clutch. When the fixed pin of the declutch shift shaft slides back and forth in the S-shaped chute, the pressure on the clutch assembly of the timing clutch can be applied to enable the clutch assembly to rotate synchronously with the clutch shaft, or the pressure on the clutch assembly of the reverse-time clutch can be applied to enable the clutch assembly to rotate synchronously with the clutch shaft.

In the actual use process, the gear shifting shaft is connected with an operating hand lever through a rocker arm, the operating hand lever can slide back and forth to drive the shifting fork to move back and forth, and then the timing clutch or the reverse timing clutch is acted. When the clutch is normally moved forward, the operating handle rod is adjusted to be a forward gear, namely the shifting fork on the clutch opening and closing push disc of the timing clutch is sleeved by the shifting fork to push the shifting fork to act on the clutch plate assembly, so that the clutch plate shell of the clutch plate assembly is in power connection with the clutch shaft under the action of the clutch plate. At this time, the input end of the timing clutch receives power input, the clutch shaft rotates synchronously, and the right side of the clutch shaft drives the timing power output gear Z3 to rotate, so as to drive the primary driven wheel to rotate. The reverse time reversing driving gear Z1 fixedly connected with the input end of the clutch shaft of the timing clutch rotates synchronously under the driving of the clutch shaft and drives the reverse time reversing driven shaft Z2 meshed with the clutch shaft to rotate synchronously, however, because the clutch plate component of the reverse time clutch is not pressed, the reverse time reversing driven shaft can only drive the clutch plate shell of the reverse time clutch to rotate, and the reverse time power output gear Z4 arranged at the output end of the reverse time clutch rotates under the driving of the primary driven gear and drives the clutch shaft of the reverse time clutch to rotate, that is, the clutch plate shell of the reverse time clutch and the clutch shaft rotate reversely. At this time, the reverse clutch is not active. The harvester is a forward gear.

When the reverse gear is needed, the operating handle lever is adjusted to be in the reverse gear, namely the shifting fork on the clutch opening and closing push disc of the reverse clutch is sleeved with the shifting fork to push the shifting fork to act on the clutch plate assembly, so that the clutch plate shell of the clutch plate assembly is in power connection with the clutch shaft under the action of the clutch plate. At this time, the input end of the timing clutch receives power input, the clutch shaft synchronously rotates and drives the reverse time reversing driving gear Z1 to synchronously rotate, the reverse time reversing driving gear Z1 drives the reverse time reversing driven gear Z2 on the clutch plate shell of the reverse time clutch to synchronously transmit, and the clutch plate assembly of the reverse time clutch is pressed to realize the power connection of the clutch plate shell and the clutch shaft, so the clutch shaft of the reverse time clutch and the reverse time reversing driven gear Z2 synchronously rotate, and the rotation of the clutch shaft of the reverse time clutch drives the reverse time power output gear Z4 fixedly arranged at the output end of the clutch shaft to rotate, thereby driving the primary driven gear to rotate. In the case of the timing clutch, the clutch shaft rotates under the action of power input, and the timing power output gear Z3 rotates under the action of the primary driven gear, but since the clutch plate assembly is not pressed, the clutch plate housing and the clutch shaft are in a power separation state, that is, the clutch shaft and the clutch plate housing of the timing clutch rotate in opposite directions. At this time, the timing clutch does not function. The harvester is a reverse gear.

The timing clutch 211 and the reverse timing clutch 212 are both positioned in a box body of a speed change mechanism of the harvester, and a main shaft and a secondary shaft are also arranged in the gearbox. The primary driven gear Z5 is fixedly arranged on the main shaft and drives the main shaft to rotate. At least two pairs of gear pairs are arranged between the main shaft and the auxiliary shaft. In this embodiment, four pairs of gear pairs are provided between the main shaft and the auxiliary shaft.

Particularly, the both sides of main shaft are provided with one-level driving gear Z6 of one-level gear pair and the secondary driving gear Z7 of secondary gear pair respectively, just one-level driving gear and secondary driving gear are axial fixity and empty sleeve and are in on the main shaft still be provided with a pair tooth 216 on the main shaft between one-level driving gear and the secondary driving gear, pair tooth with the main shaft is axial slidable circumference fixed connection, that is to say pair tooth with the main shaft sets up for the linkage. The utility model discloses a gear pair, including first-level driving gear and second-level driving gear, first-level driving gear and second-level driving gear are connected in series, first-level driving gear Z8 is set up to duplicate tooth one end to tertiary driving gear Z8 of tertiary gear pair, and the other end is the level four driving gear Z9 of level four gear pair, and tertiary driving gear with but the level four driving gear horizontal slip realize with the fixed connection of one-level driving gear or second-level driving gear specifically do the interior terminal surface of one-level driving gear.

And a first-stage driven gear Z10, a second-stage driven gear Z11, a third-stage driven gear Z12 and a fourth-stage driven gear Z13 which can be in meshing transmission with the first-stage driving gear, the second-stage driving gear, the third-stage driving gear and the fourth-stage driving gear are fixedly arranged on the auxiliary shaft.

When the double-linkage teeth are meshed with the first-stage driving gear internally and externally, the first-stage driving gear drives the second-stage driven gear to rotate, and the first-stage driven gear is a first gear. When the double-linkage teeth are meshed with the second-stage driving gear internally and externally, the second-stage driving gear drives the second-stage driven gear to rotate, and the second-stage driven gear is the second gear. When the three-stage driving gear of the double-linkage teeth is in meshed transmission with the three-stage driven gear, the three-stage driving gear is in three-gear. When the four-stage driving gear of the double-linkage gear is in meshed transmission with the four-stage driven gear, the four-stage driving gear is in four-gear.

In addition, a countershaft output gear Z14 is fixedly arranged in the middle of the countershaft, and the countershaft output gear Z14 also comprises a rotating shaft which is used for driving the left half-bridge 218 and the right half-bridge 218 of the harvester to rotate. And the left and right plate bridges 218 drive the traveling mechanism to move.

And a rotating shaft input gear Z15 meshed with the counter shaft output gear is fixedly arranged on the rotating shaft, two half-shaft driving gears Z16 are further arranged on the left half shaft and the right half shaft of the rotating shaft, and the half-shaft driving gears are respectively meshed with half-shaft driven gears Z17 arranged on the left half shaft and the right half shaft of the harvester.

The left half-shaft driving gear and the right half-shaft driving gear of the rotating shaft are sleeved on the rotating shaft in an empty mode and are driven by clutches 219 arranged on two sides of the rotating shaft respectively. Specifically, the clutch comprises a shell, wherein a clutch disc is arranged in the shell, the clutch disc is clamped on the half-shaft driving gear and is linked with the half-shaft driving gear, a cavity is further formed in the inner side of the half-shaft driving gear, and a spring is arranged in the cavity. And the end part of the half-shaft driving gear is also provided with a transmission pinion Z18 which synchronously rotates with the rotating shaft, and the end surface of the transmission pinion can be clamped with the end surface of the half-shaft driving gear through a latch. And a pushing disc capable of pushing the half-shaft driving gear to move axially is further arranged in the shell, and an oil cavity is formed between the pushing disc and the shell wall. Promote through the oil pressure push away the dish, it can promote to push away the dish the semi-axis driving gear is in remove in the pivot, work as semi-axis driving tooth move to the side with when the transmission pinion meshing, the pivot will drive the transmission pinion and rotate, and the transmission pinion then drives the semi-axis driving gear rotates, this drive of semi-axis driving gear the semi-axis driven gear on the left half-bridge or the right half-bridge of harvester rotates, and then realizes left half-bridge and right half-bridge and rotates. The forward movement or the backward movement of the harvester is realized.

In addition, bearings are provided at both ends of the rotating shaft for mounting the housing.

When the turning is needed, the oil pressure is controlled to enable the half-shaft driving gear on one side to be meshed with the transmission pinion, and the half-shaft driving gear on the other side is separated from the transmission pinion, so that the turning is achieved.

Threshing mechanism 4 says, threshing mechanism is including threshing warehouse 403, threshing warehouse is interior along vertically being divided into threshing area and lower blanking district, go up threshing area with blanking district separates 404 through the screen cloth down, upward threshing area and feed inlet intercommunication, blanking district and discharge gate intercommunication down, screen cloth 3 is through the draw-in groove detachable joint that sets up on the threshing warehouse wall.

Particularly, the screen cloth is cut apart feed inlet and discharge gate be provided with the breach on the screen cloth and be used for connecting the feed inlet, and the discharge gate is covered by the screen cloth, avoids the crop to fall out by the discharge gate without threshing.

The threshing bin is transversely arranged in a cylindrical shape and is vertically arranged in a split mode, the threshing bin is divided into a bin body 405 with a lower half portion and a cover body 406 with an upper half portion, the bin body and the screen mesh form the lower blanking area, and the cover body and the screen mesh form the upper threshing area. The clamping groove is axially arranged and comprises a fixed groove arranged on one side of the bin body and a movable groove formed by buckling the cover body and the bin body.

Particularly, the lid front side with the storehouse body front side is articulated, the lid rear side with the lock joint can be dismantled to the storehouse body rear side, the fixed slot sets up storehouse body front side inner wall, be provided with the cardboard of a plurality of downward expendings in the lid rear side, the cardboard with the short riser that sets up in the storehouse body rear side forms the movable groove, and this movable groove only is connected well at lid and storehouse, just also plays when covering the during operation, when opening the lid along the lid rear side, has also opened simultaneously the movable groove, can directly take out the screen cloth this moment.

In addition, the lower part of the bin body in the embodiment is V-shaped, the fixing groove is arranged on the front side wall of the V-shaped bin body, and the feeding hole is arranged on the front side wall of the V-shaped bin body. And a supporting rib is arranged at the lower part of the bin body. The support ribs are arranged at the lower part of the bin body in a radial direction and used for supporting the screen mesh and ensuring the stability of the screen mesh.

Because the feed end of screening mechanism is higher than the discharge end of threshing mechanism, consequently the grain after threshing is sent into screening mechanism through a shorter conveyer 10, conveying mechanism includes the object and sets up the conveying cylinder in the object.

For screening mechanism, screening mechanism 6 includes reciprocating sieve 601, reciprocating sieve is including supporting support body 603 and screen cloth 602, the screen cloth is installed support body is last, the screen cloth sets up and is in along vertical tilt up be provided with the convex dogtooth that makes progress of multirow on the screen cloth. Wherein, the screen cloth is from the preceding upwards slope setting of backward.

The screen cloth 602 includes along the cockscomb structure grating 603 of vertical setting, the cockscomb structure grating is a plurality of and transverse arrangement, passes through many grating steel wires crosswise the cockscomb structure grating is fixed form on the support frame body the screen cloth, the arrangement density of cockscomb structure grating and grating steel wire has more the grain size decision of the grain that the reality will be screened, can adjust. And a plurality of convex teeth which are convex upwards are arranged on the serrated screen bars along the longitudinal direction. This forms a plurality of rows of laterally upwardly projecting teeth.

In this embodiment, the teeth are inclined with 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 support frame body 603 is including setting up the sieve curb plate of the screen cloth left and right sides, the screen rod steel wire end connection be in on the sieve curb plate the screen cloth low level still is provided with the conveying mechanism 604 of being connected with the screen cloth, conveying mechanism meets with screen cloth incline direction unanimously and with the screen cloth short department.

The conveying mechanism is used for conveying grains or grains to be screened onto the screen mesh, and a common plate body, a belt and the like can be adopted as the conveying mechanism.

In this embodiment, the conveying mechanism 604 comprises a conveying plate, which 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.

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 is provided on the side of the panel body near the screen, a downward rear plate is provided on the high edge of the screen, and the downward folded plate and the rear plate 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 implementation manner of this embodiment, an upward folded plate may be further disposed on a side of the plate body far from the screen mesh, where the upward folded plate is disposed to facilitate matching with a feeding port of the screening mechanism and feeding. Certainly also can not set up the folded plate, directly set up through the casing of screening mechanism, reach good feeding effect.

Screening mechanism still includes the casing that has the feed inlet, the reciprocating sieve sets up in the casing the reciprocating sieve upper portion forms the screening region the reciprocating sieve lower part forms the blanking region.

The feed inlet with conveyor is relative, if the reciprocating sieve is provided with the folded plate, this the folded plate with the feed inlet is relative, can guarantee that the feeding is smooth and easy.

In addition, the high position of the vibrating screen is connected with the eccentric wheel moving mechanism 605, the low position of the vibrating screen is arranged in the slide way of the shell in a sliding way, the slide way inclines upwards from front to back, and the inclination of the slide way is greater than that of the vibrating screen. Therefore, the high part of the vibrating screen does circular motion, the low part of the vibrating screen does linear motion in the slideway, and finally the whole vibrating screen moves integrally.

Wherein, about eccentric wheel motion the two sieve curb plates of reciprocating sieve are linked firmly the mounting panel that is used for eccentric wheel motion respectively, of course the mounting panel also can with two sieve curb plates integrated into one piece. The two mounting plates are respectively provided with a mounting hole, a bearing is mounted in the mounting hole, an eccentric shaft is arranged on a central rotating plate of the two bearings, and the eccentric shaft is connected with a driving mechanism. The vibrating screen is characterized in that movable shafts are arranged on two screen side plates at the lower part of the vibrating screen, the end parts of the movable shafts penetrate through the screen side plates and are respectively connected with bearings, the bearings are respectively located in a slide way arranged on the inner side wall of the shell, and the slide way is inclined upwards.

The driving mechanism is driven by the middle rotating shaft, and power transmission is carried out through a belt, a chain wheel, a gear or other modes.

Through such setting, when the eccentric shaft rotated under actuating mechanism's drive, further driven two sieve curb plates motion, finally made whole reciprocating sieve move. 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.

As another embodiment of this embodiment, a flexible strip is connected to the two screen side plates of the vibrating screen. The flexible strip can be made of rubber. The top of the front end and the rear end of the vibrating screen and the shell are provided with flexible parts such as rubber sheets, so that a relatively closed space can be formed in a screening area, and impurities in materials can be adsorbed out when the air suction mechanism is used for screening.

And an air suction mechanism is arranged above the vibrating screen, and the air suction mechanism can select a fan.

The lower part of the shell is provided with a V-shaped bottom shell, 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 the bottom of the lower plate is connected with a flexible plate which 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 615, which is convenient for conveying grains or grains in the collecting bin to the next procedure.

And in the screening process, impurity is through the suction mechanism 606 suction that induced drafts, and the impurity that the mechanism can't be sucked out of induced drafts can pile up in the highest point of screen cloth, when piling up to a certain extent, the fan blade of the mechanism that induced drafts can shovel and move impurity at the rotation in-process to with its suction casing.

The air suction mechanism 606 comprises a driving mechanism 607 and a fan 608, wherein the fan comprises a blade 609 and an air volume adjusting mechanism.

The air quantity adjusting mechanism adjusts the air quantity by adjusting the deflection angle of the fan blade.

The air volume adjusting mechanism comprises an inner blade adjusting disk component 610 and an outer blade mounting disk component 611.

The vane regulator disk assembly is connected to an inner shaft that is disposed within the hollow outer shaft and is axially movable relative to the hollow outer shaft, and the vanes are rotatably mounted on the vane regulator disk assembly and are connected to the vane regulator disk assembly by an adjustment element 613.

In this embodiment, the upper part of the inner shaft is threadedly connected 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 which is pressed against or not pressed against the 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, a driving bevel gear is disposed at one end of the driving shaft, and a driven bevel gear in meshing transmission 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, the other end of the driving shaft is connected with a belt pulley, and the driving shaft is driven to rotate by the belt pulley.

As another embodiment of this embodiment, a support housing is disposed outside the driving shaft, and a seat body 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 base body is provided with through holes from top to bottom, the hollow outer shaft penetrates through the through holes, the hollow outer shaft is connected with the base body through bearings at the upper through hole and the lower through hole, and the two bearings are sealed through sealing elements. Similarly, bearings are arranged on the left side and the right side in the supporting shell and used for being connected with the driving shaft, and an opening in the side face of the seat body is used for installing a bevel gear pair and is connected with the shell.

In addition, 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. 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 of the mounting hole, and the other end of the adjusting piece is provided with a U-shaped groove with an opening towards the other side face. The blade positioning hole is 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 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. 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.

As another implementation manner of this embodiment, an external spline is provided on an outer wall of a lower portion of the hollow outer shaft, the external spline is connected with a flange plate with an internal spline in a matching manner and fixed by a snap ring, and the mounting cover body is fixedly connected with the flange.

The harvester adopting the embodiment is characterized in that when the harvester works, the grain pulling mechanism cuts off grains such as rice, wheat and the like through the matching of the lower cutting knife assembly and the grain pulling assembly and sends the grains into the threshing mechanism through the auger mechanism, fruits are threshed from straws through the matching of the threshing assembly of the threshing mechanism and the screen, the fruits fall into the threshing feeding auger, the fruits containing impurities are sent into the conveying device through the threshing feeding auger, the conveying device sends the fruits into the screening mechanism, the fruits are screened through the vibrating screen assembly of the screening mechanism and the air suction mechanism, the impurities in the fruits are removed, finally, the clean impurities are conveyed to the grain receiving mechanism, a grain receiving bag is arranged below the grain receiving mechanism, and clean fruits are collected.

The harvester in this embodiment integrates the functions of pulling out standing grain, threshing, screening, receiving grain and collecting, and the like, can also realize reversing speed change, and is very suitable for harvesting crops in the existing small or large farmland.

The harvester of the embodiment has the advantages of compact structure, high reliability, low failure probability and energy saving.

In addition, the novel multifunctional electric vehicle has the advantages of small occupied space, reasonable layout of the power mechanism, capability of quickly and accurately driving each functional mechanism and high use flexibility.

Second, the threshing mechanism of harvester of this embodiment directly opens the lid and can take out the screen cloth, changes or dredge the screen cloth, labour saving and time saving. The longitudinal length of the harvester is shortened, the reliability of the structure of the harvester is improved, the smooth feeding of crops at the feeding port can be ensured, and the blockage is not easy to occur.

Third, the trash content combine standard is 2.0% and the mini-harvester standard is 7.0%. The screening mechanism of the harvester of the embodiment can reach the impurity rate of 2.0 percent of the standard of the combine harvester. More importantly, the screening mechanism of the present application is for use on small harvesters that occupy a very small space relative to combine harvesters. 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.

The large-scale harvester needs to be screened for a plurality of times for reaching the impurity content of 2.0 percent, and the screening mechanism can reach the impurity content of 2.0 percent only by one screening, so that the screening time is greatly reduced for the combine harvester, and the rapid screening can be realized.

Fourthly, 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.

Fifth, the speed change mechanism of the harvester of the embodiment realizes the forward and backward movement of the harvester through the double clutch, saves the space of the gearbox, and can simplify the operating mechanism through the arrangement.

Claims (10)

1. A harvester, characterized by: including the frame rear is provided with power unit the place ahead of the power unit is provided with the driver's cabin the place ahead is for threshing mechanism and pull out standing grain mechanism in proper order, pull out standing grain mechanism front for pull out standing grain end, rear portion for the feeding end and with threshing mechanism's feed end intercommunication, threshing mechanism's rear portion one side is the output and the feed end of screening mechanism be connected, the rear of screening mechanism is the output and with connect the feed end of grain mechanism to be connected, screening mechanism with it is located driver's cabin one side to connect grain mechanism, the frame lower part is running gear and lower header mechanism.

2. A harvester as in claim 1, in which: the driver's cabin includes the seat place ahead and/or one side are the operation panel, the seat below does power unit, power unit includes the power supply, the output of power supply is connected with speed change mechanism's input, speed change mechanism's output with through drive mechanism and middle part power end connection, middle part power end is connected with threshing mechanism's threshing cylinder subassembly through first order drive system, threshing cylinder subassembly passes through the second order drive system and is connected with transition cylinder subassembly, transition cylinder subassembly passes through the third order drive system and is connected with threshing auger subassembly of threshing, threshing auger subassembly passes through the fourth order drive system and is connected with the feeding auger subassembly of pulling out standing grain mechanism, feeding auger subassembly passes through the fifth order drive system and is connected with the standing grain pulling out subassembly of pulling out standing grain mechanism.

3. A harvester as in claim 2, in which: the speed change mechanism comprises a timing clutch and a reverse-time clutch, the timing clutch and the reverse-time clutch are arranged in parallel in a reverse direction, the input end of the timing clutch is connected with input power, a reverse-time reversing driving gear is arranged at the input end of the timing clutch, a reverse-time reversing driven gear in meshing transmission with the reverse-time reversing driving gear is arranged at the input end of the reverse-time clutch, a timing power output gear is arranged at the output end of the timing clutch, a reverse-time power output gear is arranged at the output end of the reverse-time clutch, the timing power output gear and the reverse-time power output gear are in meshing transmission with a primary driven gear, and a gear shift assembly is further arranged and can drive the timing clutch or the reverse-time clutch.

4. A harvester as in claim 3, in which: the timing clutch and the reverse-time clutch both comprise clutch plate assemblies, the clutch plate assemblies of the timing clutch act on the timing power output gear, the clutch plate assemblies of the reverse-time clutch act on the reverse-time reversing driven gear, the reverse-time reversing driving gear is in transmission connection with a clutch shaft of the timing clutch, and the reverse-time power output gear is in transmission connection with the clutch shaft of the reverse-time clutch.

5. A harvester as in claim 1, 2, 3 or 4, in which: the threshing mechanism comprises a threshing bin, the threshing bin is longitudinally divided into an upper threshing area and a lower discharging area, the upper threshing area is separated from the lower discharging area through a screen, a feeding hole of the upper threshing area is communicated with a discharging hole of the grain pulling mechanism, a discharging hole of the lower discharging area is communicated with a feeding hole of the screening mechanism, and the screen is detachably clamped through a clamping groove formed in the wall of the threshing bin; the threshing bin is transversely arranged in a cylindrical shape and is vertically arranged in a split manner, the threshing bin is divided into a bin body at the lower half part and a cover body at the upper half part, the bin body and the screen form the lower blanking area, and the cover body and the screen form the upper threshing area; the clamping groove is axially arranged and comprises a fixed groove arranged on one side of the bin body and a movable groove formed by buckling the cover body and the bin body.

6. A harvester as in claim 5, in which: the lower portion of the bin body is V-shaped, the fixing grooves are formed in the V-shaped side walls, and the feed inlets are located in the V-shaped side walls.

7. A harvester as in claim 6, in which: the screening mechanism comprises a vibrating screen, the vibrating screen comprises a support frame body and a screen, the screen is installed on the support frame body and is arranged obliquely upwards along the longitudinal direction, the screen comprises a plurality of zigzag screen bars arranged along the longitudinal direction, the zigzag screen bars are arranged transversely, a plurality of screen bar steel wires transversely penetrate through the zigzag screen bars and are fixed on the support frame body to form the screen, and a plurality of convex teeth protruding upwards are arranged on the zigzag screen bars along the longitudinal direction; the support frame body comprises screen side plates arranged on the left side and the right side of the screen, the end parts of the screen bar steel wires are connected to the screen side plates, a conveying mechanism connected with the screen is further arranged at the lower position of the screen, and 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 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.

8. A harvester as in claim 7, in which: the screening mechanism comprises a shell with a feeding hole, the vibrating screen is arranged in the shell and divides the inner area of the shell into an upper screening area and a lower material collecting area, the feeding hole is opposite to the conveying mechanism, the high part of the vibrating screen is connected with the eccentric wheel movement mechanism, the low part of the vibrating screen is slidably arranged in a slide way of the shell, the slide way is arranged on the inner wall of the shell and is inclined upwards, the inclination of the slide way is greater than that of the vibrating screen, and the lower part of the screen is also provided with a material collecting bin; the vibrating screen is characterized in that mounting plates for an eccentric wheel motion mechanism are fixedly connected to two screen side plates of the vibrating screen respectively, mounting holes are formed in the two mounting plates respectively, bearings are mounted in the mounting holes, eccentric shafts are arranged on central rotating plates of the two bearings, and the eccentric shafts are connected with the motion mechanism.

9. A harvester as in claim 7 or 8, in which: an air suction mechanism is arranged above the vibrating screen, the air suction mechanism comprises a driving mechanism and a fan, the fan comprises blades and an air volume adjusting mechanism, the air volume adjusting mechanism comprises an inner blade adjusting disc component and an outer blade mounting disc component, the blade adjusting disc component is connected with an inner shaft, the blade mounting disc component is connected with a hollow outer shaft, the inner shaft is positioned in the hollow outer shaft and can axially move relative to the hollow outer shaft, and the blades are rotatably arranged on the blade mounting disc component and are connected with the blade adjusting disc component through adjusting pieces; 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.

10. A harvester as in claim 9, in which: 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 mounting 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 adjusting piece is arranged between the blade positioning hole and the blade adjusting hole, the blade is provided with a mounting shaft, 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 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 wall of the hole, and the other end of the adjusting piece is provided with a U-shaped groove which is opened towards the other side face; a guide shaft sleeve is fixedly arranged on the blade positioning hole, a 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 also arranged to penetrate through a pin hole of the mounting hole and a pin hole arranged on the mounting shaft, and the mounting shaft and the guide shaft sleeve are in clearance fit; 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.

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