CN114887876B

CN114887876B - Rice screening machine with multiple grading screens and grading screening method thereof

Info

Publication number: CN114887876B
Application number: CN202210432611.8A
Authority: CN
Inventors: 李泳作; 李乙峰; 王其玲
Original assignee: Shuyang Liming Rice Co ltd
Current assignee: Shuyang Liming Rice Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2023-04-18
Anticipated expiration: 2042-04-24
Also published as: CN114887876A

Abstract

The invention discloses a rice screening machine with multiple classified screens and a classified screening method thereof, and relates to the technical field related to the classified screening of rice.

Description

Rice screening machine with multiple grading screens and grading screening method thereof

Technical Field

The invention relates to the technical field related to rice grading and screening, in particular to a rice screening machine with various grading and screening functions and a grading and screening method thereof.

Background

The rice production process comprises harvesting, threshing, airing, shelling, screening and the like, wherein screening comprises screening stones, dust and the like in rice before threshing, screening the rice after shelling, screening rice grains of different sizes when the second type of screening is carried out, classifying and packaging, and grading and selling, in order to further classify the size of the rice grains, a grading screening mode is needed, the rice grains are classified from large to small, but the existing rice screening machines slide downwards through the gravity of the rice, and then screening is carried out through a screening plate, so that the mode is relatively mild and comprehensive, and the rice screening machine with multiple grading screens and the grading screening method are provided for solving the problems.

Disclosure of Invention

The invention aims to provide a rice screening machine with various grading screens and a grading screening method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a rice sieve machine with multiple classified screening, main part including the rice sieve machine, the receipts material frame that is used for accomodating the rice is installed to the main part internal rotation, fixed mounting has a plurality of screening mechanisms that are used for screening the rice in the receipts material frame, install the swing mechanism that is used for reciprocal swing to receive the material frame in the main part, swing mechanism includes the rotating turret, the sliding block, connecting rod and dwang, rotating turret fixed connection is in the one side of receiving the material frame, sliding block slidable mounting is on the rotating turret, the second spout that is used for the sliding block gliding is seted up to the rotating turret, the one end of connecting rod is rotated and is connected the one side at the sliding block, main part fixed mounting has the first driving piece that is used for driving connecting rod pivoted, first driving piece fixed mounting is at the other end of connecting rod, dwang fixed connection is at one side lower extreme of rotating turret, and the dwang rotates and installs on the inside wall of main part, make things convenient for the rotating turret internal rotation through the dwang, first driving piece drives the connecting rod rotation, and then make the sliding block slide in the second spout of rotating turret, and then make the reciprocating swing of rotating turret, make the rice carry out a plurality of screening mechanisms carry out multiple classified screening many times.

In further embodiment, offer the feed inlet that is used for the feeding in the middle of receiving the upper end of material frame, screening mechanism is including fixed frame, the sieve with prevent returning the board, fixed frame fixed mounting is in receiving the inside of material frame, and a plurality of fixed frames will receive the inside a plurality of cavities that divide into of material frame, the sieve sets up to a plurality of, and be different mesh numbers, the sieve mesh number that the feed inlet was kept away from more to the sieve is less, prevent returning the board fixed connection in the one side that the feed inlet was kept away from to the sieve, prevent returning the board and set up to the sheet rubber, and set up the opening of preventing returning, the opening sets up to V font structure, and the opening laminating, the rice rocks in receiving the material frame, and then filter through a plurality of sieves, prevent less rice from returning former cavity through preventing returning the board.

In further embodiment, the upper end fixedly connected with of main part is used for leading the feed mechanism in the material frame with the rice, and feed mechanism includes inlet pipe and swing pipe, and the groove that is used for installing the inlet pipe is offered to the upper end of main part, and swing pipe fixed connection makes things convenient for the rice to get into through feed mechanism and receives the material frame between inlet pipe and the material frame.

In a further embodiment, the lower extreme fixedly connected with of receipts material frame is used for receiving the receiving agencies of material, the opening that is used for dismouting receiving agencies is offered to the side of main part, receiving agencies is including accomodating bag and mounting bracket, it sets up to a plurality ofly to accomodate the bag, and communicate each other with the cavity of receiving the material frame respectively, accomodate bag fixed connection at the lower extreme of mounting bracket, mounting bracket fixed mounting is at the lower extreme of receiving the material frame, the upper end fixedly connected with of mounting bracket is used for installing the slip fixture block at receiving the material frame lower extreme, the draw-in groove that matches with the slip fixture block is offered to the lower extreme of receiving the material frame, collect categorised rice through receiving agencies.

In a further embodiment, the discharging mechanism for discharging the rice into the receiving mechanism is installed at the lower end of the receiving frame, the discharging mechanism comprises a plurality of rotating plates and hinges, the two rotating plates are in a group and rotatably installed at a cavity at the lower end of the receiving frame, the two rotating plates in the group are folded and rotated, the hinges are installed between the rotating plates and the receiving frame, and the rice in the receiving frame is discharged into the receiving mechanism through the discharging mechanism.

In further embodiment, install the link gear who is used for linking a plurality of hinges in the receipts material frame, link gear is including following the driving wheel, drive belt and action wheel, from the one end of driving wheel fixed connection at the rotor plate, the syntropy rotor plate from the driving wheel at same perpendicular, from the driving wheel dislocation distribution of non-syntropy rotor plate, the drive belt sets up to two, the distribution cup joints on the follow driving wheel lateral wall with the perpendicular, receive the material frame and offer the groove that matches with the drive belt, the one end fixedly connected with who follows the driving wheel is used for driving from driving wheel pivoted action wheel, the meshing has a plurality of intermeshing's action wheel between the action wheel, the action wheel sets up to the even number, the lateral wall fixed mounting of receiving the material frame has and is used for driving action wheel pivoted second driving piece, the rotor plate is rotated through link gear.

In a further embodiment, the sliding frame is fixedly connected to the other side of the material receiving frame, which is far away from the screening mechanism, a first sliding groove matched with the sliding frame is formed in the main body, and the material receiving frame can slide in the first sliding groove through the sliding frame so as to stably swing.

Preferably, the classifying and screening method based on the rice screening machine with multiple classifying and screening functions comprises the following steps:

a1, rice is put into a material receiving frame through a feeding hole, the rice is received by the material receiving frame, the material receiving frame is rotated in a reciprocating mode through a swinging mechanism, the rice swings in the material receiving frame, passes through sieve holes of a sieve plate according to the size of the rice, then passes through an opening of a return-preventing plate through the impact force of the rice, and accordingly the rice with different sizes is classified and screened in different cavities in the material receiving frame;

a2, make things convenient for the rotating frame at the main part internal rotation through the dwang, first driving piece drives the connecting rod and rotates, and then makes the sliding block slide in the second spout of rotating frame, and then makes the reciprocating swing of rotating frame.

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to a rice screening machine with multiple classified screening functions and a classified screening method thereof.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of an internal mounting structure of the main body according to the embodiment of the present invention;

FIG. 3 is a main body sectional view of an embodiment of the present invention;

FIG. 4 is a schematic diagram of the internal structure of the main body according to the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a swing mechanism according to an embodiment of the present invention;

FIG. 6 is an exploded view of a swing mechanism according to an embodiment of the present invention;

FIG. 7 is a schematic view of a receiving frame and a sliding frame according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a receiving frame according to an embodiment of the invention;

FIG. 9 is an enlarged view at A of FIG. 8 according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a material receiving mechanism according to an embodiment of the invention;

FIG. 11 is an enlarged view at B of FIG. 10 according to an embodiment of the present invention;

FIG. 12 is a front view of a drop feed mechanism according to an embodiment of the present invention;

FIG. 13 is an exploded view of a screening mechanism according to an embodiment of the present invention;

FIG. 14 is a partial cross-sectional view of a screening mechanism according to an embodiment of the present invention;

FIG. 15 is a top view of a linkage mechanism according to an embodiment of the present invention.

In the figure: 1. a main body; 11. a first chute; 12. limiting the idler wheel; 13. a port; 2. a material receiving frame; 21. a carriage; 3. a screening mechanism; 31. a fixing frame; 32. a sieve plate; 33. the anti-return plate; 4. a swing mechanism; 41. a rotating frame; 411. a second chute; 42. a slider; 43. a connecting rod; 44. a first driving member; 45. rotating the rod; 5. a discharging mechanism; 51. a rotating plate; 52. a hinge; 6. a material receiving mechanism; 61. a storage bag; 62. a mounting frame; 621. a sliding fixture block; 7. a linkage mechanism; 71. a driven wheel; 72. a transmission belt; 73. a driving wheel; 74. a second driving member; 8. a feeding mechanism; 81. a feed pipe; 82. a swinging pipe.

Detailed Description

The following will clearly and completely describe the technical solutions 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 embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example one

Referring to fig. 1 to 8 and 12 to 14, the present embodiment provides a rice sifter having a plurality of classified siftings and a classified sifting method thereof, including a main body 1 of the rice sifter.

Be provided with in the main part 1 and receive material frame 2, wherein, receive material frame 2 swing and install in main part 1, receive to be used for accomodating the rice in the material frame 2.

In order to conveniently place rice in the material receiving frame 2, a feed inlet is formed in the center of the upper end of the material receiving frame 2.

In order to put rice into the material receiving frame 2 through the main body 1, a feeding mechanism 8 is fixedly installed at the upper end of the material receiving frame 2.

The feeding mechanism 8 includes a feeding pipe 81 and a swinging pipe 82, the feeding pipe 81 preferably adopts an inverted trapezoid structure, the main body 1 is provided with a groove for installing the feeding pipe 81, and the feeding pipe 81 is fixed through the groove.

The both ends of swing pipe 82 are connected respectively in the lower extreme of inlet pipe 81 and the feed inlet department of receiving material frame 2, and intercommunication inlet pipe 81 and receiving material frame 2 put in the rice toward the inlet pipe 81, can lead the rice to receiving in the material frame 2 through swing pipe 82.

The swing pipe 82 is preferably a telescopic corrugated pipe, so that when the material receiving frame 2 swings in the main body 1, the swing pipe 82 deforms along with the swinging of the material receiving frame 2.

In order to conveniently screen the rice in grades, a plurality of screening mechanisms 3 are fixedly arranged in the material receiving frame 2.

As shown in fig. 8, the screening mechanism 3 includes a fixing frame 31 and a screen plate 32, the fixing frame 31 uniformly divides the inside of the material receiving frame 2 into a plurality of chambers, and the plurality of chambers are symmetrically distributed in the material receiving frame 2 by the central axis of the material receiving frame 2.

Sieve 32 fixed mounting is in fixed frame 31, and the sieve 32 mesh number of keeping away from the feed inlet is less, and then makes the entering keep away from the indoor grain of rice of feeding oral cavity less, and the sieve 32 of the same mesh number sets up with the axis symmetry of receipts material frame 2, and then makes the rice size equal in bilateral symmetry, the cavity of mirror image, can accomodate the rice in the bilateral symmetry cavity together.

In order to prevent the smaller rice grains from swinging along with the material collecting frame 2, the rice grains return to the chamber of the larger rice grains through the sieve plate 32, and the side, far away from the feeding hole, of the sieve plate 32 is fixedly provided with a return-preventing plate 33.

Wherein, prevent returning the board 33 and preferably adopt the sheet rubber, a plurality of openings have been seted up to the sheet rubber, and the opening aligns each other with the sieve mesh of sieve 32, as shown in fig. 14, is the V font structure after the laminating of opening part both ends, and it is protruding towards the one side that prevents returning the board 33 and keep away from the feed inlet.

When receiving material frame 2 and rocking, the grain of rice is at the swing and then rock at the middle cavity of receiving material frame 2 along with receiving material frame 2, and then make the grain of rice of rocking in receiving material frame 2 produce certain impact force, when the grain of rice that is less than 32 sieve meshes is located the opening part of contact rubber piece in the sieve mesh, through impact force extrusion opening, make the opening both ends open, get into the chamber of keeping away from the feed inlet, when grain of rice reverse movement strikes at the protruding time of V font, because the laminating of opening both ends, can't let it produce deformation easily, and then can't return in the original cavity.

Make the rice grain carry out the classified screening through a plurality of sieve 32, and then divide into the rice of multiple different within ranges, less rice grain can rock through receipts material frame 2 and progressively pass through a plurality of sieve 32, until can't contact the unable sieve 32 that passes through.

The one side that sieve 32 kept away from and prevent returning board 33 is preferred to be provided with gluey face, and receives the inner wall of material frame 2 and be provided with gluey face equally, glues the preferred rubber material that adopts of face, certainly, is not limited to the rubber material, still can adopt latex, plastic material etc. prevents through gluing the face that the rice from colliding with after rocking in receiving material frame 2, makes rice flexible contact sieve 32 and receipts material frame 2, and then prevents that the rice from being cracked because of colliding with.

In order to conveniently shake the material receiving frame 2, a swinging mechanism 4 is fixedly arranged in the main body 1.

The swing mechanism 4 comprises a rotating frame 41, one surface of the rotating frame 41 is fixedly connected to the side edge of the material receiving frame 2, and the lower end of the other surface of the rotating frame 41 is rotatably installed on the inner side wall of the main body 1.

In order to facilitate the rotation of the rotating frame 41, a rotating rod 45 is fixedly connected to the lower end of one side of the rotating frame 41.

Wherein, the inside wall of main part 1 is seted up and is rotated the hole with dwang 45 matching, and dwang 45 rotates to be installed in the hole of dwang, makes the rotating turret 41 can rotate in main part 1 through dwang 45.

In order to facilitate the control of the swinging of the rotating frame 41, a first driving member 44 is fixedly installed in the side wall of the main body 1.

The first driving member 44 is preferably a motor, a connecting rod 43 is disposed between the motor and the rotating frame 41, one end of one side of the connecting rod 43 is fixedly connected to an output shaft of the motor, and the other end of the other side of the connecting rod away from the motor is movably connected to the rotating frame 41.

In order to facilitate the movement of the link 43 on the rotating frame 41, one end of one surface of the link 43, which is far away from the motor, is rotatably connected with a sliding block 42.

Wherein, the second spout 411 has been seted up to the lateral wall of rotating turret 41, and in the slider 42 slidable mounting second spout 411.

When the motor starts, drive connecting rod 43 rotates, and then drives sliding block 42 and slide in second spout 411, when connecting rod 43 is circular motion, drives the reciprocal swing back and forth of rotating turret 41, and then makes and receive material frame 2 reciprocal swing, makes and receive the rice in the material frame 2 and appear rocking and the dispersion, and then the rice that is less than the sieve 32 sieve mesh progressively passes through sieve 32.

In order to stabilize the material receiving frame 2 swinging in the main body 1, a sliding frame 21 is fixedly connected to one surface of the material receiving frame 2 far away from the rotating frame 41.

Wherein, first spout 11 has been seted up to the inside of main part 1, and carriage 21 slidable mounting slides in first spout 11, slides in first spout 11 through carriage 21, and then stabilizes the swing of receipts material frame 2.

In order to further stabilize the swing of the material receiving frame 2, a limit roller 12 is rotatably mounted in the main body 1.

Wherein, spacing gyro wheel 12 preferably sets up to two, laminates respectively in the upper end both sides of receiving material frame 2, and rotates along with the swing of receiving material frame 2.

In order to take out the rice grains classified and screened in the material receiving frame 2 conveniently, the lower end of the material receiving frame 2 is provided with a discharging mechanism 5.

Wherein, the discharging mechanisms 5 are arranged in a plurality of numbers, are respectively arranged at the lower ends of the cavities arranged on each material receiving frame 2, and discharge rice grains in a single cavity through the discharging mechanisms 5.

The discharging mechanism 5 comprises two rotating plates 51, wherein the two rotating plates 51 are arranged and are respectively rotatably installed on two sides of the lower end opening of a single cavity, one side edge of each of the two rotating plates 51 is attached after being rotated, and the lower end opening of the cavity can be closed after being attached.

In order to facilitate the rotation of the rotating plate 51, a hinge 52 is fixedly arranged at the joint of the rotating plate 51 and the side edge of the lower opening of the chamber, and the rotating plate 51 is convenient to rotate through the hinge 52.

The stack appears in the grain of rice when the screening easily in current sieving mechanism, and then leads to the grain of rice that is located the top can't pass through the sifter, and compare in the current sieving mechanism that carries out the screening through self gravity, make inside rice disperse in the cavity through sieve 32 screening through the swing of receipts material frame 2, the grain of rice can not appear the stack when the screening, can't pass through the state of sifter.

Example two

Referring to fig. 15, a further improvement is made on the basis of embodiment 1:

in order to control the rotation of the rotating plate 51 conveniently, a linkage mechanism 7 is installed in the material receiving frame 2.

The linkage mechanism 7 includes a driven wheel 71 and a transmission belt 72, the driven wheel 71 is fixedly connected to one end of the hinge 52, and the hinge 52 drives the rotating plate 51 to rotate after the driven wheel 71 is rotated.

The driven wheels 71 connected with the rotating plates 51 rotating in the same direction through the hinges 52 are positioned in the same vertical plane, and the driven wheels 71 connected with the rotating plates 51 rotating in the same direction are distributed in a staggered mode.

The transmission belt 72 is preferably arranged into two grooves which are respectively sleeved on the driven wheels 71 on all the same vertical surfaces, grooves matched with the transmission belt 72 are formed in the material receiving frame 2, and the transmission belt 72 rotates in a cambered surface mode through the grooves.

The driven wheels 71 on the same vertical plane are driven to rotate by the transmission belt 72, and then all the rotating plates 51 rotating in the same direction are driven to rotate by the hinges 52.

In order to synchronously rotate the rotating plates 51 which rotate relatively and rapidly open the opening at the lower end of the chamber, a driving pulley 73 is fixedly connected to one end of the driven pulley 71.

Two groups of driving wheels 73 positioned on the driven wheels 71 in different vertical planes are positioned on the same vertical plane, a plurality of driving wheels 73 are meshed between the driving wheels 73, so that the driving wheels 73 are linked, the number of the driving wheels 73 for linkage is preferably set to be even, and further, after the driving wheels 73 rotate, the rotating plates 51 which rotate relatively can rotate synchronously.

In order to rotate the driving wheel 73, a second driving member 74 is fixedly installed on the sidewall of the material receiving frame 2.

The second driving member 74 is also preferably configured as a motor, wherein one surface of one driving wheel 73 far away from the driven wheel 71 is fixedly connected to an output shaft of the motor, and the motor operates to drive the connected driving wheel 73 to rotate, thereby driving the plurality of meshed driving wheels 73 to rotate synchronously.

EXAMPLE III

Please refer to fig. 2, fig. 4, and fig. 8-11, which are further improved based on embodiment 1:

to receive the rice discharged from the receiving frame 2. The lower end of the material receiving frame 2 is fixedly provided with a material receiving mechanism 6.

Wherein, receiving agencies 6 is including accomodating bag 61, and accomodating bag 61 is preferred to adopt the nylon material, certainly, not being restricted to the nylon material, still can adopt rope woven bag etc. as long as ventilative, the material that toughness is strong all can, and accomodating bag 61 is preferred to be set up to a plurality ofly, respectively fixed mounting at the opening part of cavity lower extreme.

When the rotating plate 51 rotates downwards, the lower end opening of the inner cavity of the material receiving frame 2 is opened, rice grains in the inner cavity slide downwards through gravity, and fall into the receiving bag 61 below the material receiving frame 2 for receiving.

In order to conveniently install the material receiving frame 2, the upper end of the receiving bag 61 is fixedly connected with an installation frame 62, and the receiving bag 61 is conveniently and fixedly installed at the lower end of the material receiving frame 2 through the installation frame 62.

In order to connect the mounting frame 62 to the lower end of the material receiving frame 2, sliding blocks 621 are fixedly connected to two sides of the upper end of the mounting frame 62.

Wherein, receive material frame 2's cavity lower extreme opening part both sides and seted up the draw-in groove, slip fixture block 621 slidable mounting is in the draw-in groove, and works as slip fixture block 621 slidable mounting in the draw-in groove, makes cavity lower extreme opening and accomodates bag 61 upper end opening and aligns the back, and slip fixture block 621's lateral wall and draw-in groove inner wall provide a reverse acting force each other, and then pass through the fixed slip fixture block 621 of damping.

In order to conveniently disassemble and assemble the material receiving mechanism 6, the through hole 13 is formed in one side of the main body 1, and the arm can conveniently stretch into the through hole 13, so that the material receiving mechanism 6 can be disassembled and assembled.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various 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. A rice screening machine with multiple classified screening, includes main part (1) of rice screening machine, its characterized in that: a material receiving frame (2) for receiving rice is rotatably mounted in the main body (1), a plurality of screening mechanisms (3) for screening the rice are fixedly mounted in the material receiving frame (2), and a swinging mechanism (4) for swinging the material receiving frame (2) in a reciprocating manner is mounted in the main body (1);

the swing mechanism (4) comprises a rotating frame (41), a sliding block (42), a connecting rod (43) and a rotating rod (45), the rotating frame (41) is fixedly connected to one surface of the material receiving frame (2), the sliding block (42) is installed on the rotating frame (41) in a sliding mode, and a second sliding groove (411) used for the sliding block (42) to slide is formed in the rotating frame (41);

one end of the connecting rod (43) is rotatably connected to one surface of the sliding block (42), a first driving part (44) for driving the connecting rod (43) to rotate is fixedly installed on the main body (1), the first driving part (44) is fixedly installed at the other end of the connecting rod (43), the rotating rod (45) is fixedly connected to the lower end of one side of the rotating frame (41), and the rotating rod (45) is rotatably installed on the inner side wall of the main body (1);

a feed inlet used for feeding is formed in the middle of the upper end of the material receiving frame (2), the screening mechanism (3) comprises a fixed frame (31), a screen plate (32) and a return-preventing plate (33), the fixed frame (31) is fixedly installed in the material receiving frame (2), the fixed frame (31) divides the interior of the material receiving frame (2) into a plurality of cavities, the screen plates (32) are multiple and are different in mesh number, and the mesh number of the screen plate (32) which is far away from the feed inlet is smaller;

prevent returning board (33) fixed connection in the one side that the feed inlet was kept away from in sieve (32), prevent returning board (33) and set up to the sheet rubber, and set up the opening of preventing returning, the opening sets up to V font structure, and the opening laminating.

2. The rice sifter of claim 1 wherein: the upper end fixedly connected with of main part (1) is used for leading the rice to feed mechanism (8) in receiving material frame (2), feed mechanism (8) are including inlet pipe (81) and swing pipe (82), the groove that is used for installing inlet pipe (81) is offered to the upper end of main part (1), swing pipe (82) fixed connection is between inlet pipe (81) and receiving material frame (2).

3. The rice sifter of claim 2, wherein the sifter comprises: the lower end of the material receiving frame (2) is fixedly connected with a material receiving mechanism (6) for receiving materials, a through hole (13) for disassembling and assembling the material receiving mechanism (6) is formed in the side edge of the main body (1), the material receiving mechanism (6) comprises a plurality of receiving bags (61) and mounting frames (62), and the receiving bags (61) are communicated with the cavities of the material receiving frame (2) respectively;

accomodate bag (61) fixed connection at the lower extreme of mounting bracket (62), mounting bracket (62) fixed mounting is at the lower extreme of receiving material frame (2), the upper end fixedly connected with of mounting bracket (62) is used for installing in the slip fixture block (621) of receiving material frame (2) lower extreme, the draw-in groove that matches with slip fixture block (621) is seted up to the lower extreme of receiving material frame (2).

4. The rice sifter of claim 3 wherein the sifter comprises: receiving the lower extreme of material frame (2) and installing drop feed mechanism (5) that are used for discharging to material receiving mechanism (6), drop feed mechanism (5) include rotor plate (51), hinge (52), rotor plate (51) set up to a plurality ofly, and two rotor plates (51) are a set of, rotate and install in receiving material frame (2) lower extreme cavity department, and two rotor plates (51) fifty percent discount in a set of rotate, hinge (52) are installed between rotor plate (51) and receiving material frame (2).

5. The rice sifter of claim 4 wherein the sifter comprises: the material collecting frame (2) is internally provided with a linkage mechanism (7) used for linking a plurality of hinges (52), the linkage mechanism (7) comprises a driven wheel (71), a transmission belt (72) and a driving wheel (73), the driven wheel (71) is fixedly connected to one end of a rotating plate (51), the driven wheels (71) of the rotating plate (51) in the same direction are arranged on the same vertical plane and are distributed in a staggered manner with the driven wheels (71) of the rotating plate (51) in the non-same direction, the transmission belt (72) is arranged in two numbers and is sleeved on the outer side wall of the driven wheel (71) in the same vertical plane in a distributed manner, and the material collecting frame (2) is provided with a groove matched with the transmission belt (72);

follow the one end fixedly connected with of driving wheel (71) and be used for driving from driving wheel (71) pivoted action wheel (73), the meshing has a plurality of intermeshing's action wheel (73) between action wheel (73), action wheel (73) set up to the even number, the lateral wall fixed mounting of receipts material frame (2) is used for driving action wheel (73) pivoted second driving piece (74).

6. The rice sifter of claim 5 wherein: the other side of the material receiving frame (2) far away from the screening mechanism (3) is fixedly connected with a sliding frame (21), and a first sliding groove (11) matched with the sliding frame (21) is formed in the main body (1).

7. A classifying screen method of a rice screening machine with a plurality of classifying screens, which adopts the rice screening machine with a plurality of classifying screens of claim 1, characterized by comprising the following steps:

a1, rice is thrown into a material receiving frame (2) through a feeding hole, the rice is received through the material receiving frame (2), the material receiving frame (2) is rotated in a reciprocating mode through a swinging mechanism (4), the rice swings in the material receiving frame (2), passes through sieve holes of a sieve plate (32) according to the size of the rice, then passes through openings of a return preventing plate (33) through self impact force, and accordingly the rice with different sizes is classified and screened in different cavities in the material receiving frame (2);

a2, the rotating frame (41) can rotate in the main body (1) conveniently through the rotating rod (45), the first driving piece (44) drives the connecting rod (43) to rotate, the sliding block (42) slides in the second sliding groove (411) of the rotating frame (41), and the rotating frame (41) can swing in a reciprocating mode.