CN115921282A

CN115921282A - Grain sieve separator

Info

Publication number: CN115921282A
Application number: CN202211654279.6A
Authority: CN
Inventors: 陈进; 王海
Original assignee: Agricultural Service Center In Houye Town Yunyang County
Current assignee: Agricultural Service Center In Houye Town Yunyang County
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-04-07

Abstract

The invention discloses a grain screening machine, which relates to the technical field of grain screening and comprises a lower box body, wherein a screen frame which plays a role in screening grains is arranged in the lower box body, a first discharge hole communicated with the upper part of the screen frame is arranged below the lower box body, and through the action of a limiting component, a worker adjusts the size of a discharge hole for discharging grains in a feed hopper onto the screen frame so as to adjust the speed of the grains in the feed hopper entering the inside of the screen frame, so that the screening precision of the grains is adjusted.

Description

Grain sieve separator

Technical Field

The invention relates to the technical field of grain screening, in particular to a grain screening machine.

Background

The grain is a general name of various plant seeds in cooking food, is also called as 'grain', contains rich nutrient substances, and mainly comprises protein, vitamins, dietary fiber, fat and the like. Belongs to staple food in human diet, and the harvesting season is concentrated in autumn.

The grain sieve separator screens according to grain particle size variation in size to this obtains the grain of different qualities, and the device of screening grain has a lot of, and the screening grain device that most commonly uses on the market divide into the triplex: the grain screening device comprises a feeding mechanism, a winnowing mechanism and a screening mechanism, wherein grain is firstly conveyed to the winnowing mechanism through the feeding mechanism, then winnowing is carried out on the grain through the winnowing mechanism, the grain is conveyed to the screening mechanism after winnowing, and the grain is screened through the screening mechanism to finally obtain clean grain.

However, the existing grain screening machine has the problems that grains are fed through the feed hopper, the feeding speed is the same, the grain feeding speed cannot be adjusted as required, and the grain screening precision is influenced when the feeding speed is too high.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a grain screening machine, which solves the problems that the feeding speed of grains is the same as that of the feeding hopper, the feeding speed of the grains can not be adjusted as required, and the grain screening precision is influenced when the feeding speed is too high in the conventional grain screening machine.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a grain sieve separator, includes box body down, be equipped with the screen frame that plays the screening effect to grain in the box body down, the below of box body is equipped with the first discharge gate with screen frame top intercommunication down, box body below is equipped with the second discharge gate with screen frame below intercommunication down, the box body upper surface is equipped with the upper cover of box body under the closure down, on cover be equipped with the feeder hopper of the inside intercommunication of box body down and the feeding of being convenient for, be equipped with the spacing subassembly that plays limiting displacement to the feeding size in the feeder hopper.

Through the technical scheme, inside the feeder hopper was poured into to the grain that the staff will need to carry out the screening, effect through spacing subassembly, the discharge gate size on the screen frame is discharged to grain in the staff adjustment feeder hopper, with the inside speed of grain entering screen frame in the adjustment feeder hopper, so that the screening efficiency of adjustment grain, when grain gets into the inside speed of screen frame and improves in the feeder hopper, grain screening efficiency is low, when grain gets into the inside speed of screen frame and reduces in the feeder hopper, grain screening efficiency has been improved, the screening efficiency of grain can be adjusted according to how much of impurity that grain contains, reduce the impurity in the grain.

Preferably, the upper cover is provided with a square groove communicated with the screen frame, the bottom end of the feeding hopper extends into the square groove and is fixedly connected with the inner wall of the square groove, the bottom end inside the feeding hopper is rotatably connected with a connecting shaft, the outer wall of the circumference of the connecting shaft is fixedly provided with a sealing plate for sealing the bottom end of the inner wall of the feeding hopper, the feeding hopper is penetrated by one end of the connecting shaft, the part of the connecting shaft penetrating the feeding hopper extends out of the upper cover, the connecting shaft is rotatably connected with the upper cover, and the part of the connecting shaft extending out of the upper cover is provided with a positioning assembly for positioning the rotation of the connecting shaft.

Through the technical scheme, the staff grasps the part that the connecting axle extends the upper cover, the connecting axle all rotates with upper cover and feeder hopper to be connected, the rotation of connecting axle can drive the closing plate rotation with connecting axle fixed connection, the closing plate is located feeder hopper inner wall bottom, the rotation of closing plate can adjust the speed that grain passes through on the feeder hopper bottom gets into the screen frame, and then the efficiency that adjustment grain was screened, the effect through locating component carries on spacingly to the position of closing plate, do not need the staff to hold the connecting axle always, staff's comfort level has been improved.

Preferably, the positioning assembly comprises a rotary table sleeved on the connecting shaft and extending out of the upper cover part, the connecting shaft penetrates through the axis position of the rotary table and is fixedly connected with the rotary table, a crank is fixedly arranged on the part of the connecting shaft penetrating out of the rotary table, the rotary table is rotatably connected with the outer surface of the upper cover, an arc-shaped groove is formed in the rotary table, and the rotary table is fixedly connected with the upper cover through a bolt.

Through the technical scheme, the threaded groove has been seted up on the upper cover, the staff grasps the crank, and the manual crank that rotates, the rotation of crank can drive and rotate with crank fixed connection's connecting axle, the rotation of connecting axle can drive and rotate with connecting axle fixed connection's carousel, the bolt loops through the arc wall and wears to establish the carousel and get into in the threaded groove, the cooperation through bolt and arc wall plays direction limiting displacement to the rotation of carousel, after the carousel rotates to suitable position, the staff manually rotates the bolt, the bolt plays the positioning action to the carousel, and then play the locking action to the carousel, so that play the locking action to the position of closing plate.

Preferably, the inside rotation of feeder hopper is connected with radial drive shaft, the circumference outer wall of drive shaft sets firmly the stirring vane who plays the effect of breaing up grain, it is equipped with drive shaft and stirring vane pivoted drive assembly to cover on.

Through above-mentioned technical scheme, when grain gets into the feeder hopper inside, the effect drive shaft through drive assembly rotates, and the rotation of drive shaft can drive and drive shaft fixed connection's stirring vane rotates, plays the effect of breaing up to the grain that agglomerates together that condenses through stirring vane's effect, reduces the possibility that the grain that agglomerates influences the grain screening.

Preferably, drive assembly is including fixing the motor at the upper cover upper surface, the output shaft end of motor is equipped with first synchronizing wheel admittedly, the one end of drive shaft is extended the feeder hopper and is rotated with the feeder hopper and be connected, the part that the drive shaft extends the feeder hopper has set firmly second synchronizing wheel, the outside cover of first synchronizing wheel and second synchronizing wheel is equipped with the hold-in range with first synchronizing wheel and second synchronizing wheel adaptation.

Through above-mentioned technical scheme, the effect through the motor drives and rotates with motor output shaft end fixed connection's first synchronizing wheel, and the rotation through first synchronizing wheel can drive and rotate with the hold-in range of first synchronizing wheel meshing, and the rotation of hold-in range can drive and rotate with the second synchronizing wheel of hold-in range meshing, and the rotation through second synchronizing wheel can drive and rotate with second synchronizing wheel axle center fixed connection's drive shaft.

Preferably, the inside slot of having seted up of feeder hopper, and the slot interpolation is connected has the baffle, set up the cylindrical slot that all communicates with slot and baffle on the feeder hopper, the tight connection has the inserted bar in the cylindrical slot, the inserted bar is worn to establish the baffle and is got into in the feeder hopper and with the feeder hopper tight connection.

Through the technical scheme, the staff inserts the one end of baffle to the slot in, later wear to establish the feeder hopper with the inserted bar and get into in the baffle, and the inserted bar wears to establish the other end that the baffle got into the feeder hopper, the feeder hopper inner wall has set firmly the supporting shoe that plays supporting role to the baffle, supporting shoe and baffle all are located the stirring vane top, when grain inside the feeder hopper and when contacting with stirring vane, stirring vane's rotation can make grain outwards rotate because of centrifugal force, the effect through the baffle plays the effect of sheltering from grain, reduce the possibility that grain spilled over from the feeder hopper top, improve grain screening efficiency.

Preferably, the lower box body below is equipped with the support that plays supporting role to lower box body, four extreme angle departments of support up end all have set firmly down the spliced pole, four extreme angle departments of terminal surface all have set firmly the upper connecting post under the lower box body, the upper connecting post passes through damping spring fixed connection with adjacent lower spliced pole.

Through above-mentioned technical scheme, the effect through the support plays the supporting role to box down, plays the cushioning effect to box down through the cooperation of last spliced pole, spliced pole and damping spring down.

Preferably, the upper cover is fixedly connected with the lower box body through a spring fastener.

Through above-mentioned technical scheme, the effect through the snak link is convenient for upper cover and lower box body fixed connection, reduces the possibility that grain spills over from box body top down, and reduces the possibility that the dust spills over from box body down through upper cover and lower box body fixed connection.

(III) advantageous effects

The invention provides a grain screening machine. The method has the following beneficial effects:

(1) This grain sieve separator, inside the feeder hopper is poured into to the grain that the staff will need to filter, effect through spacing subassembly, the discharge gate size on the screen frame is discharged to grain in the staff adjustment feeder hopper, with grain entering screen frame inside speed in the adjustment feeder hopper, so that the screening efficiency of adjustment grain, when grain gets into the inside speed of screen frame and improves in the feeder hopper, grain screening efficiency is low, when grain gets into the inside speed of screen frame and reduces in the feeder hopper, grain screening efficiency has been improved, the screening efficiency of grain can be adjusted according to how much of impurity that grain contains, reduce the impurity in the grain.

(2) This grain sieve separator, when grain gets into the feeder hopper inside, the effect drive shaft through drive assembly rotates, and the rotation of drive shaft can drive and drive shaft fixed connection's stirring vane rotates, and the effect through stirring vane plays the effect of breaing up to the grain that condenses to be conglomerated together, reduces the possibility that the grain that agglomerates influences the grain screening.

(3) This grain sieve separator plays the effect of sheltering from to grain through the effect of baffle, reduces the possibility that grain spilled over from the feeder hopper top, improves grain screening efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a screen frame embodying the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic cross-sectional view of the feed hopper of the present invention.

In the figure: 1. a support; 2. a lower box body; 3. an upper connecting column; 4. a lower connecting column; 5. a damping spring; 6. a first discharge port; 7. a second discharge port; 8. an upper cover; 9. a spring buckle; 10. a feed hopper; 11. a screen frame; 12. a drive shaft; 13. a stirring blade; 14. a baffle plate; 15. a rod is inserted; 16. sealing plates; 17. a connecting shaft; 18. a crank; 19. a turntable; 20. an arc-shaped slot; 21. a bolt; 22. a motor; 23. a first synchronizing wheel; 24. a synchronous belt; 25. and a second synchronizing wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a technical solution: the utility model provides a grain sieve separator, including box body 2 down, be equipped with the screen frame 11 that plays the screening effect to grain in the box body 2 down, the below of box body 2 is equipped with the first discharge gate 6 with screen frame 11 top intercommunication down, 2 below of box body is equipped with the second discharge gate 7 with screen frame 11 below intercommunication down, 2 upper surfaces of box body are equipped with the upper cover 8 that seals box body 2 down, be equipped with on the upper cover 8 with the inside intercommunication of box body 2 down and the feeder hopper 10 of the feeding of being convenient for, be equipped with the spacing subassembly that plays limiting displacement to the feeding size in the feeder hopper 10, the staff pours the grain that needs to filter into inside the feeder hopper 10, effect through spacing subassembly, the discharge gate size on the screen frame 11 is arranged into to grain in the staff adjustment feeder hopper 10, with the speed that grain got into screen frame 11 inside in the adjustment feeder hopper 10, so that the screening efficiency of grain can adjust the screening efficiency of grain, when grain gets into the inside speed of screen frame 11 and improves in the feeder hopper 10, grain screening efficiency is low, when grain gets into the inside speed reduction of screen frame 11 in grain, grain screening efficiency has improved grain.

As shown in fig. 3 and 4, a square groove communicated with the screen frame 11 is formed in the upper cover 8, the bottom end of the feeding hopper 10 extends into the square groove and is fixedly connected with the inner wall of the square groove, the bottom end inside the feeding hopper 10 is rotatably connected with the connecting shaft 17, a sealing plate 16 for sealing the bottom end of the inner wall of the feeding hopper 10 is fixedly arranged on the circumferential outer wall of the connecting shaft 17, the feeding hopper 10 is penetrated through one end of the connecting shaft 17, the part of the connecting shaft 17 penetrating out of the feeding hopper 10 extends out of the upper cover 8, the connecting shaft 17 is rotatably connected with the upper cover 8, the part of the connecting shaft 17 extending out of the upper cover 8 is provided with a positioning component for positioning the rotation of the connecting shaft 17, the connecting shaft 17 is rotatably connected with the upper cover 8 and the feeding hopper 10, the rotation of the connecting shaft 17 can drive the sealing plate 16 fixedly connected with the connecting shaft 17 to rotate, the sealing plate 16 is located at the bottom end of the inner wall of the feeding hopper 10, the sealing plate 16 can adjust the speed of grains entering the screen frame 11 through the bottom end of the feeding hopper 10, further adjust the efficiency of the screened grains, the screening of the sealing plate 16, the position of the sealing plate 16 is limited by the position of the sealing plate 16 by the positioning component, the connecting plate, the connecting shaft 17 is not needed, the worker is not needed, and the comfort of the worker is improved.

As shown in fig. 3, the positioning assembly includes a rotating disc 19 sleeved on the connecting shaft 17 and extending out of the upper cover 8, the connecting shaft 17 penetrates through the axis position of the rotating disc 19 and is fixedly connected with the rotating disc 19, a crank 18 is fixedly arranged on the portion of the connecting shaft 17 penetrating through the rotating disc 19, the rotating disc 19 is rotatably connected with the outer surface of the upper cover 8, an arc-shaped groove 20 is formed in the rotating disc 19, the rotating disc 19 is fixedly connected with the upper cover 8 through a bolt 21, a thread groove is formed in the upper cover 8, a worker grasps the crank 18 and manually rotates the crank 18, the rotation of the crank 18 drives the connecting shaft 17 fixedly connected with the crank 18 to rotate, the rotation of the connecting shaft 17 drives the rotating disc 19 fixedly connected with the connecting shaft 17 to rotate, the bolt 21 sequentially penetrates through the arc-shaped groove 20 and enters the thread groove, the bolt 21 and the arc-shaped groove 20 cooperate with the rotating disc 19 to play a guiding and limiting role, after the rotating disc 19 rotates to a proper position, the worker manually rotates the bolt 21, the bolt 21 plays a positioning role on the rotating disc 19, and further plays a role in locking the position of the sealing plate 16.

As figure 4, feeder hopper 10 internal rotation is connected with radial drive shaft 12, the circumference outer wall of drive shaft 12 sets firmly has the stirring vane 13 of the effect of breaing up grain, be equipped with drive shaft 12 and stirring vane 13 pivoted drive assembly on the upper cover 8, when grain gets into feeder hopper 10 inside, effect drive shaft 12 through drive assembly rotates, the rotation of drive shaft 12 can drive stirring vane 13 with drive shaft 12 fixed connection and rotate, the effect through stirring vane 13 plays the effect of breaing up the grain that condenses together into a group, reduce the possibility that the grain screening is influenced to the grain that agglomerates.

As shown in fig. 2 and 3, the driving assembly includes a motor 22 fixed on the upper surface of the upper cover 8, an first synchronizing wheel 23 is fixedly arranged at the output shaft end of the motor 22, one end of a driving shaft 12 extends out of the feeding hopper 10 and is rotatably connected with the feeding hopper 10, a second synchronizing wheel 25 is fixedly arranged at the part of the driving shaft 12 extending out of the feeding hopper 10, a synchronous belt 24 matched with the first synchronizing wheel 23 and the second synchronizing wheel 25 is sleeved outside the first synchronizing wheel 23 and the second synchronizing wheel 25, the first synchronizing wheel 23 fixedly connected with the output shaft end of the motor 22 is driven to rotate through the action of the motor 22, the synchronous belt 24 meshed with the first synchronizing wheel 23 is driven to rotate through the rotation of the first synchronizing wheel 23, the second synchronizing wheel 25 meshed with the synchronous belt 24 is driven to rotate through the rotation of the second synchronizing wheel 25, and the driving shaft 12 fixedly connected with the shaft center of the second synchronizing wheel 25 is driven to rotate through the rotation of the second synchronizing wheel 25.

As shown in fig. 4, a slot is formed inside the feeding hopper 10, a baffle 14 is connected in the slot in an inserting manner, a cylindrical groove communicated with the slot and the baffle 14 is formed in the feeding hopper 10, an inserting rod 15 is connected in the cylindrical groove in an inserting manner, the inserting rod 15 penetrates through the baffle 14 to enter the feeding hopper 10 and is connected with the feeding hopper 10 in an inserting manner, a worker inserts one end of the baffle 14 into the slot, then the inserting rod 15 penetrates through the feeding hopper 10 to enter the baffle 14, the inserting rod 15 penetrates through the baffle 14 to enter the other end of the feeding hopper 10, a supporting block for supporting the baffle 14 is fixedly arranged on the inner wall of the feeding hopper 10, the supporting block and the baffle 14 are both located above the stirring blade 13, when grains are inside the feeding hopper 10 and are in contact with the stirring blade 13, the rotation of the stirring blade 13 can enable the grains to rotate outwards under the action of centrifugal force, the effect of shielding the grains is achieved through the baffle 14, the possibility of overflowing of the grains from the top end of the feeding hopper 10 is reduced, and the grain screening efficiency is improved.

If fig. 1 and fig. 2, 2 below of box body are equipped with the support 1 that plays supporting role to box body 2 down, four extreme angle departments of 1 up end of support all set firmly down spliced pole 4, four extreme angle departments of terminal surface all set firmly last spliced pole 3 under the lower box body 2, it passes through damping spring 5 fixed connection with adjacent lower spliced pole 4 to go up spliced pole 3, the effect through support 1 plays supporting role to box body 2 down, through last spliced pole 3, lower spliced pole 4 and damping spring 5's cooperation plays the cushioning role to box body 2 down.

As shown in figure 1, the upper cover 8 is fixedly connected with the lower box body 2 through the spring fastener 9, the upper cover 8 and the lower box body 2 are fixedly connected through the spring fastener 9, the possibility that grains overflow from the top end of the lower box body 2 is reduced, and the possibility that dust overflows from the lower box body 2 is reduced through the upper cover 8 and the lower box body 2.

When the grain screening machine is used, a power supply is switched on, a switch is switched on, the lower box body 2 is supported through the support 1, grains are screened through the screen frame 11 positioned in the lower box body 2, the lower box body 2 is fixedly provided with the vibration motor which enables the screen frame 11 to vibrate so as to improve screening efficiency, and the screening of the grains by the screen frame 11 and the use of the vibration motor are the prior art, so that the screening of the grains by the screen frame 11 and the use of the vibration motor are not described in detail herein;

the upper cover 8 seals the opening part at the top end of the lower box body 2, the upper cover 8 is fixedly connected with the lower box body 2 through the spring fastener 9, and the spring fastener 9 is the prior art, so that redundant description is not provided herein, and meanwhile, the upper cover 8 seals the lower box body 2, so that dust generated when the lower box body 2 and the screen frame 11 vibrate is reduced, and the influence of the dust on operators is reduced;

a square groove communicated with the inside of the lower box body 2 is formed in the upper cover 8, the bottom end of the inside of the feed hopper 10 extends into the square groove, and the feed hopper 10 is communicated with the inside of the lower box body 2;

a worker grasps the crank 18 and manually rotates the crank 18, the rotation of the crank 18 can drive the connecting shaft 17 fixedly connected with the crank 18 to rotate, the rotation of the connecting shaft 17 can drive the turntable 19 fixedly connected with the connecting shaft 17 to rotate, the rotation of the turntable 19 can drive the connecting shaft 17 fixedly connected with the turntable 19 to rotate, the rotation of the connecting shaft 17 can drive the sealing plate 16 fixedly connected with the connecting shaft 17 to rotate, the sealing plate 16 rotates to a proper position, and the speed of grains entering the lower box body 2 through the feed hopper 10 can be adjusted through the rotation of the sealing plate 16;

the bolt 21 and the arc-shaped groove 20 are matched to play a role in guiding and limiting the rotation of the turntable 19, when the sealing plate 16 rotates to a proper position, a worker manually rotates the bolt 21 to enable the bolt 21 to be abutted against the turntable 19, the bolt 21 plays a role in locking the turntable 19, the rotating angle of the sealing plate 16 is further locked, and the possibility that the sealing plate 16 shakes in the grain falling process is reduced;

after the position of the sealing plate 16 is adjusted, the motor 22 is turned on, the first synchronizing wheel 23 fixedly connected with the motor 22 can be driven to rotate under the action of the motor 22, the rotation of the first synchronizing wheel 23 can drive the synchronous belt 24 adaptive to the first synchronizing wheel 23 to rotate, the rotation of the synchronous belt 24 can drive the second synchronizing wheel 25 adaptive to the synchronous belt 24 to rotate, the rotation of the second synchronizing wheel 25 can drive the driving shaft 12 fixedly connected with the second synchronizing wheel 25 to rotate, the rotation of the driving shaft 12 can drive the stirring blades 13 fixedly connected with the driving shaft 12 to rotate, the effect of scattering the grains condensed into clusters under the action of the stirring blades 13 is achieved, and the possibility that the grains condensed out of the clusters influence the screening is reduced;

the method comprises the following steps that a worker pours grains into a feed hopper 10, inserts a baffle 14 into a slot in the feed hopper 10, sequentially penetrates an insertion rod 15 through the feed hopper 10, the baffle 14 and the feed hopper 10, the baffle 14 is fixedly connected with the feed hopper 10 under the action of the insertion rod 15, and the baffle 14 is supported under the action of a supporting block, so that when the stirring blades 13 rotate and scatter the grains, the grains rotate under the rotation of the stirring blades 13 due to centrifugal force, and the possibility that the grains overflow out of the feed hopper 10 from the top end of the feed hopper 10 is reduced under the action of the baffle 14;

under the effect of the screen frame 11, the impurities of the grain fall above the screen frame 11 and overflow through the first discharge hole 6, and the grain overflows from the second discharge hole 7 under the screening effect of the screen frame 11, which is the prior art, so that the details are not repeated here, which is the using process of the grain screening machine, and the contents which are not described in detail in the specification belong to the prior art known by the professional skilled in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a grain sieve separator, includes box body (2) down, its characterized in that: be equipped with screen frame (11) that play the screening effect to grain in box body (2) down, the below of box body (2) is equipped with first discharge gate (6) with screen frame (11) top intercommunication down, box body (2) below is equipped with second discharge gate (7) with screen frame (11) below intercommunication down, box body (2) upper surface is equipped with upper cover (8) of box body (2) under the closure, be equipped with on upper cover (8) with the inside intercommunication of box body (2) down and feeder hopper (10) of the feeding of being convenient for, be equipped with the spacing subassembly that plays limiting displacement to the feeding size in feeder hopper (10).

2. The grain screening machine of claim 1, wherein: offer the square groove with sieve frame (11) intercommunication on upper cover (8), feeder hopper (10) bottom extend to square inslot and with square inslot wall fixed connection, feeder hopper (10) inside bottom is rotated and is connected with connecting axle (17), the circumference outer wall of connecting axle (17) sets firmly closing plate (16) of feeder hopper (10) inner wall bottom, feeder hopper (10) are worn to establish by the one end of connecting axle (17), the part that feeder hopper (10) were worn to establish by connecting axle (17) extends upper cover (8), connecting axle (17) rotate with upper cover (8) and are connected, the part that connecting axle (17) extended upper cover (8) is equipped with the locating component who plays the positioning action to the rotation of connecting axle (17).

3. The grain screening machine of claim 2, wherein: locating component establishes carousel (19) that upper cover (8) part extends including the cover at connecting axle (17), connecting axle (17) wear to establish the axle center position of carousel (19) and with carousel (19) fixed connection, the part that carousel (19) were worn to establish in connecting axle (17) has set firmly crank (18), carousel (19) rotate with upper cover (8) surface and are connected, arc wall (20) have been seted up on carousel (19), carousel (19) pass through bolt (21) fixed connection with upper cover (8).

4. The grain screening machine of claim 1, wherein: feeder hopper (10) internal rotation is connected with radial drive shaft (12), the circumference outer wall of drive shaft (12) has set firmly stirring vane (13) of playing the effect of breaing up grain, be equipped with drive shaft (12) and stirring vane (13) pivoted drive assembly on upper cover (8).

5. The grain screening machine of claim 4, wherein: drive assembly is including fixing motor (22) at upper cover (8) upper surface, the output shaft end of motor (22) is equipped with first synchronizing wheel (23) admittedly, the one end of drive shaft (12) extends feeder hopper (10) and rotates with feeder hopper (10) and is connected, the part that drive shaft (12) extends feeder hopper (10) has set firmly second synchronizing wheel (25), the outside cover of first synchronizing wheel (23) and second synchronizing wheel (25) is equipped with hold-in range (24) with first synchronizing wheel (23) and second synchronizing wheel (25) adaptation.

6. The grain screening machine of claim 1, wherein: the feed hopper (10) is internally provided with a slot, a baffle (14) is connected in the slot in an inserting mode, a cylindrical groove communicated with the slot and the baffle (14) is formed in the feed hopper (10), an inserting rod (15) is tightly connected in the cylindrical groove, and the inserting rod (15) penetrates through the baffle (14) to enter the feed hopper (10) and is tightly connected with the feed hopper (10).

7. The grain screening machine of claim 1, wherein: box body (2) below is equipped with support (1) that plays supporting role to box body (2) down, four end angle departments of support (1) up end all have set firmly down spliced pole (4), four end angle departments of terminal surface all have set firmly down spliced pole (3) down box body (2), go up spliced pole (3) and adjacent lower spliced pole (4) through damping spring (5) fixed connection.

8. The grain screening machine of claim 1, wherein: the upper cover (8) is fixedly connected with the lower box body (2) through a spring buckle (9).