Quantitative-adding rice crushing equipment and method

Abstract

The invention relates to the technical field of rice processing equipment, in particular to quantitative adding type rice crushing equipment and a quantitative adding type rice crushing method. The device comprises a mounting assembly, the mounting assembly comprises a shell, a feeding hopper is arranged at the top of the shell, a sieve plate is arranged in the shell, and a sliding groove is formed in the inner side wall of the feeding hopper; a feeding hopper is arranged in the shell, a pair of quantitative feeding assemblies which are symmetrically arranged are arranged in the feeding hopper, the quantitative feeding assemblies are used for controlling the amount of added rice, a smashing assembly is arranged in the shell and located below the feeding hopper, and the smashing assembly is used for smashing the rice; according to the quantitative-adding rice crushing equipment, the extraction assembly arranged between the shell and the feeding hopper is used for extracting rice which is not fully crushed at the top of the sieve plate and taking the rice into the crushing assembly to be ground again, and in addition, the stirring and knocking assembly can stir the extraction assembly, so that the rice crushing efficiency is improved. And therefore, the range of the broken rice extracted by the extraction assembly is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of rice processing equipment, and specifically, to a rice pulverizing equipment and method with quantitative addition. Background Art

[0002] Rice is one of the agricultural products and is a major foodstuff, occupying an important position in life. When rice is processed, its grains need to be pulverized using a pulverizer. A pulverizer is a machine that pulverizes large-sized rice into required sizes. The pulverizer consists of devices such as coarse crushing, fine crushing, and pneumatic conveying, and achieves the purpose of pulverizing rice in the form of high-speed impact.

[0003] During the process of pulverizing rice by existing rice pulverizers, due to the uneven size of rice grains and the uneven force on the rice grains, the degree of fineness of the pulverized rice obtained will be uneven. The incompletely pulverized rice still needs to be collected by workers and then pulverized again, which is time-consuming. Additionally, when using a screening mechanism to screen the pulverized rice, the mixture of pulverized rice obtained by the crushing mechanism will accumulate around the discharge port, and the relatively large-sized pulverized rice may also block the sieve holes, which is not conducive to the screening of the pulverized rice and affects the processing efficiency of rice. Especially for some household rice pulverizers, for non-professional users, if the above situations occur, it will cause troubles in the use and maintenance of the equipment and is not conducive to household use.

[0004] In view of this, we propose a rice pulverizing equipment and method with quantitative addition to improve the deficiencies in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a rice pulverizing equipment with quantitative addition to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned object, one of the objects of the present invention is to provide a quantitatively added rice crushing device, including a mounting assembly, the mounting assembly including a shell, a feeding hopper is provided on the top of the shell, a sieve plate is provided inside the shell, and a slide groove is provided on the inner side wall of the feeding hopper; a pair of symmetrically arranged quantitative feeding assemblies are provided in the feeding hopper, and the quantitative feeding assemblies are used to control the amount of added rice, a crushing assembly is provided below the feeding hopper in the shell, the crushing assembly is used to crush the rice, and the sieve plate screens the crushed rice, a toggling and knocking assembly is provided below the crushing assembly, the toggling and knocking assembly is used to flatten the broken rice accumulated on the top of the sieve plate, the toggling and knocking assembly can knock on the side wall of the sieve plate to prevent the broken rice from clogging the sieve plate, an extraction assembly is connected between the shell and the feeding hopper, the extraction assembly is used to extract the rice that is not fully crushed on the top of the sieve plate, and the toggling and knocking assembly can toggle the extraction assembly to expand the range of rice that can be extracted by the extraction assembly.

[0007] As a further improvement of the present technical solution, the quantitative feeding assembly includes a weighing plate slidably connected in the slide groove, a rack is provided on one side of the weighing plate, a side of the rack away from the weighing plate is meshed with a unloading gear, and the unloading gear is driven by a motor.

[0008] As a further improvement of the present technical solution, the crushing assembly includes a pair of grinding chambers arranged on two inner side walls of the shell that are far away from each other, a grinding disc is provided between the two grinding chambers, the grinding disc is rotatably connected to the shell, a first driven wheel disc is coaxially connected to one end of the grinding disc, a first driving wheel disc is provided at one end of the first driven wheel disc, the first driven wheel disc and the first driving wheel disc are connected by a peripheral belt, and the first driving wheel disc is driven by a motor.

[0009] As a further improvement of the present technical solution, the plucking and striking assembly includes a second driving wheel disc coaxially connected to one side of the first driving wheel disc and a swinging groove opened on the side wall of the screen plate, a second driven wheel disc is provided below the second driving wheel disc, the second driven wheel disc is coaxially connected to a driving gear on the side close to the screen plate, a driven gear is meshed with one side of the driving gear, and a protrusion is coaxially connected to the bottom of the driven gear.

[0010] As a further improvement of the technical solution, the extraction component includes an extraction pipe, and a plurality of fans are arranged in the extraction pipe, and the plurality of fans are driven by a motor.

[0011] As a further improvement of the present technical solution, the extraction pipe includes a main pipe, the main pipe is connected to the feeding hopper, the end of the main pipe away from the feeding hopper is rotatably connected to a swing pipe, the end of the swing pipe away from the main pipe is located in a swing groove, a torsion spring is provided on the top of the swing pipe, the inner ring of the torsion spring is fixedly connected to the outer wall of the main pipe, and the outer ring of the torsion spring is fixedly connected to the swing pipe.

[0012] As a further improvement of the technical solution, a blocking sponge is provided between the two outer side walls of the swing tube and the inner side wall of the swing groove.

[0013] The second object of the present invention is to provide a method for operating the above-mentioned quantitative addition rice milling device, comprising the following method steps:

[0014] S1. First, add rice to the top of the quantitative feeding component in the feeding hopper. After the weight of the rice to be added reaches a preset amount, turn on the power of the quantitative feeding component, and the two quantitative feeding components are separated from each other, so that the rice added to the feeding hopper falls into the crushing component;

[0015] S2, then, the power of the crushing component is turned on, and the crushing component grinds and crushes the rice from the quantitative feeding component, and the crushed rice of various particle sizes falls to the top of the sieve plate;

[0016] S3, after being screened by the sieve plate, the rice with larger particles and not fully crushed will continue to stay on the top of the sieve plate. At the same time, the motor driving the crushing component also drives the toggling and knocking component to work, and the broken rice accumulated on both sides of the sieve plate is evenly flattened on the top of the sieve plate. The toggling and knocking component will also continuously knock on the side wall of the sieve plate in the process of flattening the broken rice, and the broken rice blocked in the sieve holes of the sieve plate will be shaken off;

[0017] S4. The broken rice remaining on the top of the sieve plate after screening is extracted into the feeding hopper by the extraction component, and then falls into the crushing component for re-crushing. In the process of moving the knocking component to flatten the broken rice on the top of the sieve plate, the knocking component can also continuously swing the bottom of the extraction component, so that the direction of the air inlet at the bottom of the extraction component is continuously changed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the quantitatively added rice crushing equipment, the quantitative feeding component is used to control the amount of added rice, the crushing component is arranged below the feeding hopper, and is used to crush the rice, and then the crushed rice is screened by the sieve plate.

[0020] 2. In the quantitatively added rice crushing equipment, a stirring and knocking assembly is provided to flatten the broken rice accumulated on the top of the sieve plate, and the stirring and knocking assembly can knock the side wall of the sieve plate to prevent the broken rice from clogging the sieve plate.

[0021] 3. In the quantitatively added rice grinding device, an extraction component is arranged between the shell and the feeding hopper to extract the insufficiently ground rice on the top of the sieve plate, and the rice is transferred to the grinding component for re-grinding. In addition, the extraction component can be moved by turning the knocking component, thereby expanding the range of broken rice that can be extracted by the extraction component. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is an overall cutaway schematic diagram of the present invention;

[0024] Figure 3 It is the overall cutaway left view of the present invention;

[0025] Figure 4 is a cutaway view of the installation assembly of the present invention;

[0026] Figure 5 It is a structural diagram of the quantitative feeding component of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 It is a structural diagram of the crushing assembly of the present invention;

[0029] Figure 8 It is a structural diagram of the toggle knocking component of the present invention;

[0030] Figure 9 It is a structural diagram of the extraction component of the present invention;

[0031] Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle.

[0032] The meaning of each number in the figure is:

[0033] 10. Installation assembly; 11. Shell; 12. Feeding hopper; 13. Screen plate; 14. Slideway;

[0034] 20. Quantitative feeding assembly; 21. Weighing plate; 22. Rack; 23. Unloading gear;

[0035] 30. Crushing assembly; 31. Grinding chamber; 32. Grinding disc; 33. First driven wheel disc; 34. First driving wheel disc;

[0036] 40. Stirring and striking assembly; 41. Second driving wheel disc; 42. Swinging groove; 43. Second driven wheel disc; 44. Driving gear; 45. Driven gear; 46. Protrusion;

[0037] 50. Extraction assembly; 51. Extraction pipe; 511. Main pipe; 512. Swing pipe; 513. Torsion spring; 52. Fan; 53. Blocking sponge. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figures 1-10 As shown, the purpose of this embodiment is to provide a quantitatively added rice crushing device, including a mounting assembly 10, the mounting assembly 10 includes a shell 11, a feeding hopper 12 is provided on the top of the shell 11, a sieve plate 13 is provided inside the shell 11, and a slide groove 14 is provided on the inner side wall of the feeding hopper 12; a pair of symmetrically arranged quantitative feeding assemblies 20 are provided in the feeding hopper 12, and the quantitative feeding assembly 20 is used to control the amount of added rice, and a crushing assembly 30 is provided below the feeding hopper 12 in the shell 11, and the crushing assembly 30 is used to crush the rice, and the sieve plate 13 is provided inside the shell 11. The crushed rice is screened, a knocking assembly 40 is provided below the crushing assembly 30, the knocking assembly 40 is used to flatten the broken rice accumulated on the top of the sieve plate 13, the knocking assembly 40 can knock the side wall of the sieve plate 13, and is used to prevent the broken rice from clogging the sieve plate 13, an extraction assembly 50 is connected between the housing 11 and the feeding hopper 12, the extraction assembly 50 is used to extract the rice that is not fully crushed on the top of the sieve plate 13, the knocking assembly 40 can stir the extraction assembly 50, and is used to expand the range of rice that the extraction assembly 50 can extract.

[0041] First, the specific structure of the toggle knocking assembly 40 is disclosed. The toggle knocking assembly 40 includes a second driving wheel disc 41 coaxially connected to one side of the first driving wheel disc 34 and a swing groove 42 opened on the side wall of the screen plate 13. A second driven wheel disc 43 is provided below the second driving wheel disc 41. The second driven wheel disc 43 is coaxially connected to a driving gear 44 on a side close to the screen plate 13. A driven gear 45 is meshed with one side of the driving gear 44. A protrusion 46 is coaxially connected to the bottom of the driven gear 45.

[0042] Furthermore, driven by the motor, the second driving wheel disc 41 rotates synchronously with the first driving wheel disc 34, the second driving wheel disc 41 drives the second driven wheel disc 43 to rotate through a belt, the second driven wheel disc 43 drives the driving gear 44 to rotate, the driving gear 44 drives the driven gear 45 to rotate, and the driven gear 45 drives the protrusion 46 to rotate along the top surface of the sieve plate 13. During this process, the protrusion 46 can flatten the broken rice accumulated on the top of the sieve plate 13, and can shake off the broken rice blocked in the sieve holes of the sieve plate 13 by continuously knocking on the side wall of the sieve plate 13, and can also continuously fluctuate the swing tube 512, thereby increasing the range of the swing tube 512 to extract broken rice on the surface of the sieve plate 13.

[0043] Secondly, the specific structure of the extraction component 50 is disclosed. The extraction component 50 includes an extraction pipe 51, and a plurality of fans 52 are arranged in the extraction pipe 51. The plurality of fans 52 are driven by a motor; the extraction pipe 51 includes a main pipe 511, and the main pipe 511 is connected to the hopper 12. The end of the main pipe 511 away from the hopper 12 is rotatably connected to a swing pipe 512, and the end of the swing pipe 512 away from the main pipe 511 is located in the swing groove 42. A torsion spring 513 is arranged on the top of the swing pipe 512, and the inner circle of the torsion spring 513 is fixedly connected to the outer wall of the main pipe 511, and the outer circle of the torsion spring 513 is fixedly connected to the swing pipe 512;

[0044] Furthermore, the motor drives the fan 52 coaxially connected to itself to rotate. After multiple fans 52 rotate simultaneously, negative pressure is formed in the extraction pipe 51, so that the broken rice intercepted by the sieve plate 13 is extracted into the feeding hopper 12 through the swing tube 512, and then crushed again by the crushing component 30. At the same time, the swinging and knocking component 40 drives the swinging tube 512 to swing left and right continuously in the swinging groove 42 in the process of flattening the broken rice accumulated on the top of the sieve plate 13, and the swinging tube 512 is reset under the action of the restoring force of the deformed torsion spring 513, thereby expanding the area where the extraction pipe 51 can extract the broken rice. At the same time, the broken rice on the top of the sieve plate 13, which was originally inaccessible to the swinging and knocking component 40, is sucked into the vicinity of the swinging and knocking component 40.

[0045] Since it is necessary to ensure that the amount of rice added to the shell 11 each time is determined, the quantitative feeding component 20 includes a weighing plate 21 slidably connected to the slide groove 14, a rack 22 is provided on one side of the weighing plate 21, and a discharge gear 23 is meshed on the side of the rack 22 away from the weighing plate 21, and the discharge gear 23 is driven by a motor.

[0046] The improvement lies in that a gravity sensor of model DA380 is provided inside the weighing plate 21, and a threshold value is pre-set on the weighing plate 21. When the rice added into the feeding hopper 12 reaches the threshold value, the gravity sensor controls the motor under the unloading gear 23 to rotate, and the motor drives the unloading gear 23 coaxially connected with its own output shaft to rotate. The unloading gear 23 drives the rack 22 to drive the two weighing plates 21 to separate from each other, and the rice on the top of the two weighing plates 21 is scraped by the edge of the chute 14 and all falls into the crushing assembly 30. The weighing plate 21 is an electronic scale and will not be described in detail here.

[0047] Since the rice needs to be crushed, the crushing assembly 30 includes a pair of grinding chambers 31 arranged on two inner side walls of the shell 11 that are far away from each other, a grinding disc 32 is provided between the two grinding chambers 31, the grinding disc 32 is rotatably connected to the shell 11, a first driven wheel disc 33 is coaxially connected to one end of the grinding disc 32, a first driving wheel disc 34 is provided at one end of the first driven wheel disc 33, the first driven wheel disc 33 and the first driving wheel disc 34 are connected by a peripheral belt, and the first driving wheel disc 34 is driven by a motor.

[0048] The improvement is that: all motors used in the present invention are energy-saving motors, and the energy-efficient motors selected are high-efficiency motors with IE4 energy efficiency. This motor adopts advanced design and manufacturing technology, has high conversion efficiency and energy-saving characteristics, and is suitable for use in household appliances. The motor drives the first driving wheel 34 coaxially connected to its own output shaft to rotate, and the first driving wheel 34 drives the first driven wheel 33 to rotate through a belt, and the first driven wheel 33 drives the grinding disc 32 to rotate, and grinds the rice that falls between the grinding disc 32 and the grinding bin 31. At the same time, the diameter of the first driving wheel 34 is set to be larger than the diameter of the first driven wheel 33, so that when the motor drives the first driving wheel 34 to rotate at a relatively low speed, it can drive the first driven wheel 33 to rotate at a relatively high speed, so that the motor is more efficient and energy-saving when working.

[0049] In order to prevent the broken rice from slipping out of the swing groove 42 during the process of extracting the broken rice from the swing tube 512 , a blocking sponge 53 is provided between the two outer side walls of the swing tube 512 and the inner side wall of the swing groove 42 .

[0050] The improvement lies in that: in the process of the protrusion 46 constantly moving the swing tube 512, driven by the driving force of the protrusion 46 and the restoring force of the torsion spring 513 after deformation, the swing tube 512 will continuously collide with the inner wall of the swing groove 42, and a blocking sponge 53 is arranged between the two outer walls of the swing tube 512 and the inner wall of the swing groove 42. On the one hand, it can provide a certain protection for the swing tube 512, and on the other hand, it can prevent broken rice from slipping from the gap between the swing tube 512 and the swing groove 42.

[0051] Embodiment 2

[0052] Based on the content provided in Embodiment 1, this embodiment aims to provide a method for operating a rice grinding device with quantitative addition proposed in Embodiment 1. The specific steps are as follows:

[0053] S1. First, add rice to the top of the weighing plate 21 inside the feeding hopper 12. After the weight of the added rice reaches the pre-set amount, turn on the power supply. The gravity sensor controls the motor below the feeding gear 23 to rotate. This motor drives the feeding gear 23 coaxially connected to its output shaft to rotate. The feeding gear 23 drives the rack 22 to drive the two weighing plates 21 to separate from each other. Then, the rice on the top of the two weighing plates 21 falls onto the top of the grinding disc 32 under the scraping of the edge of the chute 14.

[0054] S2. Then, turn on the power supply of the crushing assembly 30. Under the action of its own gravity and the driving force of the rotation of the grinding disc 32, the broken rice falls between the grinding disc 32 and the grinding chamber 31. The rice is ground by the mutual frictional force between the grinding disc 32 and the grinding chamber 31. The broken rice with various particle sizes after crushing all falls onto the top of the sieve plate 13.

[0055] S3. After screening by the sieve plate 13, the rice with larger particles and insufficiently crushed will continue to stay on the top of the sieve plate 13. At the same time, the second driving wheel disc 41 rotates synchronously with the first driving wheel disc 34. The second driving wheel disc 41 drives the second driven wheel disc 43 to rotate through the belt. The second driven wheel disc 43 drives the driving gear 44 to rotate. The driving gear 44 drives the driven gear 45 to rotate. The driven gear 45 then drives the convex block 46 to rotate along the top surface of the sieve plate 13. During this process, the convex block 46 can flatten the broken rice piled up on the top of the sieve plate 13, can shake off the broken rice blocked in the sieve holes of the sieve plate 13 by continuously knocking on the side wall of the sieve plate 13, and can also continuously swing the swing pipe 512, thereby increasing the range of the swing pipe 512 to extract broken rice on the surface of the sieve plate 13.

[0056] S4. After screening, there is still a part of the broken rice remaining on the top of the sieve plate 13. The motor drives the fan 52 coaxially connected to itself to rotate. After multiple fans 52 rotate simultaneously, a negative pressure is formed in the extraction pipe 51, so as to extract the broken rice intercepted by the sieve plate 13 into the feeding hopper 12 through the swing pipe 512, and then re-crush it through the crushing assembly 30. At the same time, during the process of the convex block 46 flattening the broken rice piled up on the top of the sieve plate 13, it drives the swing pipe 512 to continuously swing left and right in the swing groove 42. And the swing pipe 512 is reset under the restoring force of the deformed torsion spring 513, thereby expanding the area range that the extraction pipe 51 can extract broken rice, and at the same time, sucking the broken rice in the area on the top of the sieve plate 13 that could not be touched by the convex block 46 before to the surrounding of the convex block 46.

[0057] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A quantitatively added rice crushing device, characterized in that: The installation assembly (10) comprises a shell (11), a hopper (12) is provided on the top of the shell (11), a sieve plate (13) is provided inside the shell (11), and a slide groove (14) is provided on the inner wall of the hopper (12); A pair of symmetrically arranged quantitative feeding components (20) are provided in the feeding hopper (12), and the quantitative feeding components (20) are used to control the amount of rice added; a crushing component (30) is provided in the housing (11) below the feeding hopper (12), and the crushing component (30) is used to crush the rice; the sieve plate (13) is used to sieve the crushed rice; a toggle knocking component (40) is provided below the toggle knocking component (30), and the toggle knocking component (40) is used to flatten the rice accumulated on the sieve plate (13); The knocking assembly (40) can knock the side wall of the sieve plate (13) to prevent the broken rice from clogging the sieve plate (13); an extraction assembly (50) is connected between the housing (11) and the hopper (12); the extraction assembly (50) is used to extract the rice that is not fully crushed on the top of the sieve plate (13); the knocking assembly (40) can knock the extraction assembly (50) to expand the range of rice that can be extracted by the extraction assembly (50).

2. The quantitatively added rice crushing equipment according to claim 1, characterized in that: The quantitative feeding assembly (20) comprises a weighing plate (21) slidably connected in the slide groove (14); a rack (22) is provided on one side of the weighing plate (21); a feeding gear (23) is meshed with the side of the rack (22) away from the weighing plate (21); and the feeding gear (23) is driven by a motor.

3. The quantitatively added rice crushing equipment according to claim 1, characterized in that: The pulverizing assembly (30) comprises a pair of grinding chambers (31) arranged on two inner side walls of the shell (11) that are separated from each other; a grinding disc (32) is arranged between the two grinding chambers (31); the grinding disc (32) is rotatably connected to the shell (11); a first driven wheel disc (33) is coaxially connected to one end of the grinding disc (32); a first driving wheel disc (34) is arranged at one end of the first driven wheel disc (33); the first driven wheel disc (33) and the first driving wheel disc (34) are connected via a peripheral belt; and the first driving wheel disc (34) is driven by a motor.

4. The quantitatively added rice milling device according to claim 3, characterized in that: The plucking and striking assembly (40) comprises a second driving wheel disc (41) coaxially connected to one side of the first driving wheel disc (34) and a swinging groove (42) provided on the side wall of the screen plate (13); a second driven wheel disc (43) is provided below the second driving wheel disc (41); the second driven wheel disc (43) is coaxially connected to a driving gear (44) on a side close to the screen plate (13); a driven gear (45) is meshed with one side of the driving gear (44); a protrusion (46) is coaxially connected to the bottom of the driven gear (45).

5. The quantitatively added rice crushing device according to claim 4, characterized in that: The extraction component (50) comprises an extraction pipe (51), a plurality of fans (52) are arranged inside the extraction pipe (51), and the plurality of fans (52) are all driven by a motor.

6. The quantitatively added rice milling device according to claim 5, characterized in that: The extraction pipe (51) comprises a main pipe (511), the main pipe (511) is connected to the feeding hopper (12), one end of the main pipe (511) away from the feeding hopper (12) is rotatably connected to a swing pipe (512), one end of the swing pipe (512) away from the main pipe (511) is located in a swing groove (42), a torsion spring (513) is provided at the top of the swing pipe (512), the inner ring of the torsion spring (513) is fixedly connected to the outer wall of the main pipe 511, and the outer ring of the torsion spring (513) is fixedly connected to the swing pipe (512).

7. The quantitatively added rice milling device according to claim 6, characterized in that: A blocking sponge (53) is provided between the two outer side walls of the swing tube (512) and the inner side wall of the swing groove (42).

8. A method for operating the quantitative addition rice milling device as claimed in claim 1, characterized in that: The method comprises the following steps: S1. First, rice is added to the top of the quantitative feeding component (20) in the feeding hopper (12). When the weight of the added rice reaches a preset amount, the power supply of the quantitative feeding component (20) is turned on, and the two quantitative feeding components (20) are separated from each other, so that the rice added to the feeding hopper (12) falls into the crushing component (30); S2, then, the power supply of the crushing assembly (30) is turned on, and the crushing assembly (30) grinds and crushes the rice from the quantitative feeding assembly (20), and the crushed rice of various particle sizes falls onto the top of the sieve plate (13); S3, after being screened by the sieve plate (13), the rice with larger particles and not fully crushed will continue to stay on the top of the sieve plate (13), and at the same time, the motor driving the crushing assembly (30) also drives the toggling and knocking assembly (40) to work, so that the broken rice accumulated on both sides of the sieve plate (13) is evenly spread on the top of the sieve plate (13), and the toggling and knocking assembly (40) will also continuously knock on the side wall of the sieve plate (13) in the process of flattening the broken rice, so as to shake off the broken rice blocked in the sieve holes of the sieve plate (13); S4, the broken rice remaining on the top of the sieve plate (13) after screening is extracted by the extraction component (50) into the feeding hopper (12), and then falls into the crushing component (30) to be crushed again. In the process of moving the knocking component (40) to flatten the broken rice on the top of the sieve plate (13), the knocking component (40) can also continuously swing the bottom of the extraction component (50), so that the direction of the air inlet at the bottom of the extraction component (50) is continuously changed.

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