Screen mechanism, rice milling device and rice milling machine
By designing a rotatable screen mechanism and using a rotating drive to rotate the screen body alternately, the problem of rice bran adhering to the screen is solved, achieving self-cleaning of the screen and improving the rice bran separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-04-10
AI Technical Summary
Rice bran easily adheres to the screen of a household rice milling machine during use, which reduces its filtration performance and affects the separation of rice bran.
Design a sieve mechanism in which the sieve body is rotatably mounted on a support. The drive component in the drive assembly drives the transmission component to output reciprocating motion, causing the sieve body to rotate alternately in the forward and reverse directions along its own circumference, thereby achieving self-cleaning of the sieve, shaking and vibrating rice bran particles and straightening rice husks.
It effectively keeps the sieve mesh pores clear, improves the filtration performance of the sieve, ensures the separation effect of rice bran, and achieves the filtration of rice husks, thereby improving the overall separation effect.
Smart Images
Figure CN121819985A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household rice milling machine technology, and in particular to a sieve mechanism, rice milling device and rice milling machine. Background Technology
[0002] With a home rice milling machine, people only need to mill a small amount of rice when they need it, thus achieving "milling less for less food, milling as needed," eliminating the need to "mill before eating," and allowing them to enjoy fresh rice anytime.
[0003] During the use of a household rice milling machine, the screen, a key component, is often covered with rice bran, which reduces the screen's filtration performance and affects the separation of rice bran. Summary of the Invention
[0004] Therefore, it is necessary to provide a screen mechanism, a rice milling device, and a rice milling machine to address the problem that rice bran often adheres to the outer surface of the screen of a household rice milling machine, which reduces the filtration performance of the screen and affects the separation effect of rice bran.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] In a first aspect, embodiments of this application provide a sieve mechanism, which is disposed within a rice milling device, and the sieve mechanism includes:
[0007] Support;
[0008] The screen body is cylindrical and rotatably mounted on the support; and
[0009] The driving assembly includes a rotary drive and a transmission component. The transmission component is connected to the rotary drive and the screen body respectively. The transmission component is used to output reciprocating motion to drive the screen body to rotate alternately in the forward and reverse directions along its own circumference.
[0010] In one embodiment of the first aspect, the drive assembly further includes a connector connected to the screen body and driven by the transmission member, the transmission member driving the screen body to rotate alternately in the forward and reverse directions along its own circumference via the connector.
[0011] In one embodiment of the first aspect, the transmission member includes a cam, one end of which is connected to the drive end of the rotary drive member, and the other end of which abuts against the connector along the circumference of the screen body.
[0012] In one embodiment of the first aspect, the cam is provided with a toggle part, which is offset from the rotation axis of the cam;
[0013] The connector is provided with an elongated groove, the width of which is perpendicular to the axial direction and radial direction of the screen body, respectively.
[0014] The actuating part is inserted into the groove along the rotation axis of the cam and slides with the groove along its length.
[0015] In one embodiment of the first aspect, the depth direction of the groove coincides with the radial direction of the screen body, and the length direction of the groove is parallel to the axial direction of the screen body.
[0016] When the cam rotates under the drive of the rotary drive, the actuating part abuts against the inner wall of the groove along the width direction.
[0017] In one embodiment of the first aspect, the depth direction of the groove is parallel to the axial direction of the screen body, and the length direction of the groove coincides with the radial direction of the screen body.
[0018] In one embodiment of the first aspect, the screen mechanism further includes a bearing, and the screen body is rotatably mounted on the support via the bearing.
[0019] In one embodiment of the first aspect, the bearings are paired and sleeved at both ends of the screen body along its own axial direction.
[0020] Secondly, this application also provides a rice milling device, including the sieve mechanism described in any of the above embodiments.
[0021] Thirdly, embodiments of this application also provide a rice milling machine, including the rice milling device described in any of the above embodiments.
[0022] Compared to related technologies, the beneficial effects of this application are as follows: In the above-mentioned screen mechanism, the screen body is rotatably mounted on the support. Based on this, the rotary drive component in the drive assembly drives the transmission component to rotate continuously, and the transmission component outputs reciprocating motion, thereby causing the screen body to rotate alternately in the forward and reverse directions along its own circumference. This means that the screen body continuously vibrates within a small range, which can shake off rice bran particles adhering to the screen body, keeping the filter holes of the screen body clean and unobstructed, achieving the purpose of self-cleaning of the screen body, thereby improving the filtration performance of the screen body and ensuring the separation effect of rice bran. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of the screening mechanism in some embodiments of this application;
[0025] Figure 2 This is a schematic diagram of the internal structure of the rice milling device in some embodiments of this application;
[0026] Figure 3 This is a schematic diagram of the structure of the drive component and the screen body in some embodiments of this application;
[0027] Figure 4 This is a cross-sectional schematic diagram of the drive component and the screen body in some embodiments of this application;
[0028] Figure 5 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 1 ;
[0029] Figure 6 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 2 ;
[0030] Figure 7 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 3 ;
[0031] Figure 8 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 4 ;
[0032] Figure 9 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 5 ;
[0033] Figure 10 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 6 ;
[0034] Figure 11 This is a schematic diagram of the operating state of the screening mechanism in some embodiments of this application. Figure 7 ;
[0035] Figure 12 This is a schematic diagram of the screen mechanism in another embodiment of this application;
[0036] Figure 13This is a top view of the screening mechanism in another embodiment of this application;
[0037] Figure 14 This is a cross-sectional schematic diagram of the drive assembly and the screen body in another embodiment of this application.
[0038] Explanation of reference numerals in the attached figures:
[0039] 10. Screening mechanism; 20. Rice milling roller;
[0040] 100, Support; 200, Screen body; 300, Drive assembly; 310, Rotary drive component; 320, Transmission component; 320a, Cam; 321, Actuating part; 330, Connector; 331, Groove; 400, Bearing. Detailed Implementation
[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0043] Furthermore, where the term "and / or" appears, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0047] The inventors of this application have discovered that existing household rice milling machines, in the process of grinding paddy rice and separating rice from rice bran, use a method of threshing, squeezing, and friction to separate the rice from the husk. This easily breaks the rice husk into fine dust particles, i.e., rice bran. This rice bran easily adheres to the filter holes of the sieve, causing blockage and reducing the filtration performance of the sieve, thus affecting the separation effect of the rice bran.
[0048] Furthermore, after the rice is separated from the rice husk, some of the husk is not broken down into smaller pieces, but rather remains separated from the rice, forming large husks. These husks are difficult to pass through the filter holes and tend to get stuck on the inner wall of the screen, which also reduces the screen's filtration performance.
[0049] Therefore, embodiments of this application provide a sieve mechanism 10, disposed within a rice milling device. Please refer to [further details omitted]. Figure 1 and Figure 2 The screen mechanism 10 includes a support 100, a screen body 200, and a drive assembly 300.
[0050] The screen body 200 is cylindrical and rotatably mounted on the support 100.
[0051] The drive assembly 300 includes a rotary drive 310 and a transmission component 320. The transmission component 320 is connected to the screen body 200 of the rotary drive 310 and is used to output reciprocating motion to drive the screen body 200 to rotate alternately in the forward and reverse directions along its own circumference.
[0052] It should be noted that the alternating forward and reverse rotation of the screen body 200 along its circumference specifically means that the screen body 200 first rotates forward along its circumference by a preset angle, then changes the direction of rotation and rotates in the opposite direction along its circumference by the same angle until it returns to its original position, and repeats the above action. In the screen mechanism 10 described above, the screen body 200 is rotatably mounted on the support 100. Based on this, the rotary drive component 310 in the drive assembly 300 drives the transmission component 320 to rotate continuously. The transmission component 320 then outputs a reciprocating motion, thereby causing the screen body 200 to rotate alternately forward and reverse along its circumference. That is, the screen body 200 continuously vibrates within a small range, which can shake off the rice bran particles adhering to the screen body 200, keeping the filter holes of the screen body 200 clean and unobstructed, achieving the purpose of self-cleaning of the screen body 200, thereby improving the filtration performance of the screen body 200 and ensuring the separation effect of rice bran.
[0053] In addition, by shaking the screen body 200, large rice husks can be straightened out and fall into the rice bran bin along the filter holes of the screen body 200. This can also improve the filtration performance of the screen body 200, ensure the separation effect of rice bran, and filter out large rice husks.
[0054] Understandably, using the transmission component 320 to convert rotary motion into reciprocating motion reduces the requirements for the power source. Using the rotary drive component 310 as the power source results in a simple structure, low cost, and high stability.
[0055] For example, the rotary drive 310 can be an electric motor or a hydraulic motor, etc.
[0056] In some embodiments, the screen mechanism 10 further includes a bearing 400, and the screen body 200 is rotatably mounted on the support 100 via the bearing 400.
[0057] In use, the outer ring of the bearing 400 is fixedly connected to the support 100, and the inner ring of the bearing 400 is fixedly connected to the screen body 200, so that the screen body 200 is rotatably mounted on the support 100.
[0058] When the screen body 200 rotates alternately in the forward and reverse directions along its own circumference, the outer ring and inner ring of the bearing 400 rotate relative to each other, which can reduce the friction force on the screen body 200 during rotation and keep the screen body 200 stable.
[0059] Furthermore, in some embodiments, bearings 400 are paired and sleeved at both ends of the screen body 200 along its own axial direction.
[0060] At this time, the two bearings 400 provide rotational support to both ends of the screen body 200, which enables the screen body 200 to rotate more stably.
[0061] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the drive component 300 further includes a connector 330.
[0062] The connector 330 is connected to the screen body 200 and is also connected to the transmission component 320. In use, the transmission component 320 drives the screen body 200 to rotate alternately in the forward and reverse directions along its own circumference via the connector 330.
[0063] In some embodiments, the transmission member 320 includes a cam 320a. One end of the cam 320a is connected to the drive end of the rotary drive member 310, and the other end of the cam 320a abuts against the connector 330 along the circumference of the screen body 200.
[0064] In use, the rotary drive 310 drives the cam 320a to rotate, and the rotation axis of the cam 320a remains constant. With the cam 320a abutting against the connector 330 along the circumference of the screen body 200, the distance between the connector 330 and the rotation axis of the cam 320a continuously changes along the circumference of the screen body 200 as the cam 320a rotates. Therefore, the connector 330 moves along the circumference of the screen body 200, and for every revolution of the cam 320a, the connector 330 reciprocates once, thereby causing the screen body 200 to rotate alternately in both forward and reverse directions along its own circumference.
[0065] Understandably, the connecting member 330 can be located on one side of the cam 320a along the circumference of the screen body 200. In this case, the cam 320a abuts against the connecting member 330 in a single direction, which can push the connecting member 330 away from its own axis of rotation, completing the outward movement. At the same time, the support 100 is also provided with a spring or other reset structure, which can keep the connecting member 330 abutting against the cam 320a when the cam 320a no longer actively abuts against the connecting member 330, and reset as the cam 320a continues to rotate, completing the return movement.
[0066] Alternatively, the connecting member 330 can be located on both sides of the cam 320a along the circumference of the screen body 200. In this case, the cam 320a can abut the connecting member 330 in two opposite directions, driving the connecting member 330 to complete the outward and return movements in sequence, that is, driving the connecting member 330 to move back and forth along the circumference of the screen body 200.
[0067] In other embodiments, the transmission component 320 may also be a reciprocating lead screw and a lead screw nut. The reciprocating lead screw is connected to the drive end of the rotary drive component 310, and the lead screw nut is connected to the connecting component 330 in a transmission manner.
[0068] In use, the rotary drive 310 drives the reciprocating screw to rotate, which in turn drives the screw nut to move back and forth along the length of the reciprocating screw, converting the rotary motion into a reciprocating linear motion, thereby driving the connecting piece 330 to move back and forth along the circumference of the screen body 200.
[0069] In some other embodiments, the transmission element 320 may also be a crank connecting rod, which will not be described in detail here.
[0070] Please refer to the following: Figure 3 and Figure 4 In this embodiment, a toggle part 321 is provided on the cam 320a, and the toggle part 321 is set off from the rotation axis of the cam 320a.
[0071] Correspondingly, the connector 330 is provided with an elongated groove 331, the width direction of which is perpendicular to the axial direction and radial direction of the screen body 200, respectively.
[0072] The actuating part 321 is inserted into the groove 331 along the rotation axis of the cam 320a and slides with the groove 331 along the length of the groove 331.
[0073] Understandably, when the connector 330 is at the midpoint of the travel, the direction in which the actuating part 321 inserts into the groove 331 is the depth direction of the groove 331, and at this time the depth direction of the groove 331 coincides with the rotation axis direction of the cam 320a.
[0074] When the rotary drive 310 drives the cam 320a to rotate, the actuating part 321 rotates accordingly. Since the actuating part 321 is set off from the rotation axis of the cam 320a, the movement trajectory of the actuating part 321 is circular, and the plane containing this circle is perpendicular to the rotation axis of the cam 320a, that is, perpendicular to the depth direction of the groove 331, and parallel to the length and width directions of the groove 331.
[0075] During the rotation of the actuating part 321, the actuating part 321 can slide within the groove 331 along its length direction. Decomposing the displacement of the actuating part 321, its component along the length direction of the groove 331 causes relative sliding between the actuating part 321 and the connecting member 330, while its component along the width direction of the groove 331 causes the actuating part 321 to move the connecting member 330.
[0076] Since the width direction of the groove 331 is perpendicular to the axial direction and radial direction of the screen body 200, when the actuating part 321 drives the connecting piece 330 to move along the width direction of the groove 331, it will not drive the connecting piece 330 to move along the axial direction of the screen body 200, nor will it drive the connecting piece 330 to move along the radial direction of the screen body 200. Instead, it will drive the connecting piece 330 to move back and forth in the circumference of the screen body 200.
[0077] It should be noted that the radial direction of the screen body 200 specifically refers to the direction of the line connecting the center of the connector 330 and the center of the screen body 200, that is, the straight line direction of the radial line of the screen body 200 that passes through the center of the connector 330, which will not be elaborated further below.
[0078] For example, please refer to Figure 1 and Figure 5 In the initial state, the actuating part 321 is located to the right of the rotation axis of the cam 320a. At this time, the connecting member 330 is located at the midpoint of the travel stroke.
[0079] Please combine Figure 6 and Figure 7Subsequently, the actuating part 321 rotates counterclockwise with the cam 320a and abuts against the upper side wall of the groove 331, thereby driving the connecting member 330 to move upward until the actuating part 321 is above the rotation axis of the cam 320a. At this time, the connecting member 330 is located at one end of the travel stroke.
[0080] Please combine Figure 8 and Figure 9 Based on this, the actuating part 321 continues to rotate counterclockwise with the cam 320a and presses against the lower side wall of the groove 331, thereby driving the connecting member 330 to move downward until the actuating part 321 is located to the left of the rotation axis of the cam 320a. At this time, the connecting member 330 returns to the midpoint of its travel stroke.
[0081] Please combine Figure 10 and Figure 11 Subsequently, the actuating part 321 continues to rotate counterclockwise with the cam 320a, also pressing downward against the lower side wall of the groove 331, and continues to drive the connecting member 330 downward until the actuating part 321 is below the rotation axis of the cam 320a. At this time, the connecting member 330 is at the other end of the travel stroke.
[0082] Finally, the actuating part 321 continues to rotate counterclockwise with the cam 320a, and once again abuts against the upper side wall of the groove 331, thereby driving the connecting member 330 to move upward until the actuating part 321 is located to the right of the rotation axis of the cam 320a. At this time, the connecting member 330 returns to the midpoint of its travel stroke.
[0083] As a result, the actuating part 321 rotates one revolution, and the connecting part 330 moves back and forth once.
[0084] For example, the actuating part 321 is cylindrical, and the axis of the actuating part 321 is parallel to the rotation axis of the cam 320a.
[0085] Please refer to it again. Figure 3 and Figure 4 Furthermore, in some embodiments, the depth direction of the groove 331 coincides with the radial direction of the screen body 200, and the length direction of the groove 331 is parallel to the axial direction of the screen body 200.
[0086] At this time, the rotary drive 310, cam 320a and connector 330 are arranged in sequence along the radial direction of the screen body 200.
[0087] Correspondingly, when the cam 320a rotates under the drive of the rotary drive member 310, the actuating part 321 abuts against the inner wall of the groove 331 along the width direction.
[0088] It should be noted that the width of the groove 331 is greater than the width of the actuating part 321, but smaller than the diameter of the circular motion trajectory of the actuating part 321.
[0089] When the connecting member 330 reciprocates along the circumference of the screen body 200 under the drive of the actuating part 321, the orientation of the connecting member 330 continuously changes, and the direction of the line connecting the center of the connecting member 330 and the center of the screen body 200 changes accordingly. That is to say, the depth direction of the groove 331 continuously changes. At the same time, the orientation of the actuating part 321 remains unchanged, always parallel to the rotation axis of the cam 320a. Therefore, the connecting member 330 deflects relative to the actuating part 321.
[0090] At this time, the width of the groove 331 is made greater than the width of the actuating part 321, allowing the actuating part 321 to move slightly within the groove 331 along the width direction of the groove 331. This can prevent the connector 330 and the actuating part 321 from getting stuck, and does not affect the movement of the connector 330 by the actuating part 321 along the width direction of the groove 331.
[0091] Please refer to the following: Figure 12 , Figure 13 and Figure 14 In other embodiments, the depth direction of the groove 331 is parallel to the axial direction of the screen body 200, and the length direction of the groove 331 coincides with the radial direction of the screen body 200.
[0092] At this time, the rotary drive 310, cam 320a and connector 330 are arranged in sequence along the axial direction of the screen body 200.
[0093] When the connector 330 reciprocates along the circumference of the screen body 200 under the drive of the actuating part 321, the depth direction of the groove 331 remains unchanged regardless of the orientation of the connector 330. The depth direction of the groove 331, the axial direction of the screen body 200, and the rotation axis direction of the cam 320a are parallel to each other. Correspondingly, the actuating part 321 is always inserted into the groove 331 along the depth direction of the groove 331. The actuating part 321 and the inner wall of the groove 331 along the width direction can be either clearance-fitted or tightly fitted.
[0094] In summary, in the aforementioned screen mechanism 10, the screen body 200 is rotatably mounted on the support 100. Based on this, the rotary drive component 310 in the drive assembly 300 drives the transmission component 320 to rotate continuously. The transmission component 320 then outputs reciprocating motion, thereby causing the screen body 200 to rotate alternately in the forward and reverse directions along its own circumference. This means that the screen body 200 is continuously vibrating within a small range, which can shake off rice bran particles adhering to the screen body 200 and straighten out large rice husks, allowing them to fall into the rice bran bin through the filter holes of the screen body 200. This keeps the filter holes of the screen body 200 clean and unobstructed, achieving the self-cleaning purpose of the screen body 200, thereby improving the filtration performance of the screen body 200, ensuring the separation effect of rice bran, and also filtering out large rice husks.
[0095] Please see Figure 2 The embodiments of this application also provide a rice milling device, including the sieve mechanism 10 in any of the above embodiments.
[0096] This embodiment has the screen mechanism 10 of any of the above embodiments, and therefore has all the beneficial effects of the screen mechanism 10 of any of the above embodiments, which will not be described in detail here.
[0097] Specifically, the rice milling device also includes a rice milling roller 20.
[0098] During use, the rice milling roller 20 rotates relative to the screen body 200. Unhulled rice rubs against the rice milling roller 20 and the screen body 200, causing the rice husks to break down and fall off, thus separating the rice from the husks. The fallen husks fall through the filter holes of the screen body 200 and enter the rice bran bin.
[0099] Embodiments of this application also provide a rice milling machine, specifically a household rice milling machine, which includes the rice milling device in any of the above embodiments.
[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A sieve mechanism, characterized in that, The sieve mechanism is disposed within the rice milling device, and the sieve mechanism includes: Support; The screen body is cylindrical and rotatably mounted on the support; and The driving assembly includes a rotary drive and a transmission component. The transmission component is connected to the rotary drive and the screen body respectively. The transmission component is used to output reciprocating motion to drive the screen body to rotate alternately in the forward and reverse directions along its own circumference.
2. The screen mechanism according to claim 1, characterized in that, The drive assembly also includes a connector, which is connected to the screen body and driven by the transmission component. The transmission component drives the screen body to rotate alternately in the forward and reverse directions along its own circumference through the connector.
3. The sieve mechanism according to claim 2, characterized in that, The transmission component includes a cam, one end of which is connected to the driving end of the rotary drive component, and the other end of which abuts against the connecting component along the circumference of the screen body.
4. The screen mechanism according to claim 3, characterized in that, The cam is provided with a toggle part, which is offset from the rotation axis of the cam; The connector is provided with an elongated groove, the width of which is perpendicular to the axial direction and radial direction of the screen body, respectively. The actuating part is inserted into the groove along the rotation axis of the cam and slides with the groove along its length.
5. The screen mechanism according to claim 4, characterized in that, The depth direction of the groove coincides with the radial direction of the screen body, and the length direction of the groove is parallel to the axial direction of the screen body. When the cam rotates under the drive of the rotary drive, the actuating part abuts against the inner wall of the groove along the width direction.
6. The screen mechanism according to claim 4, characterized in that, The depth direction of the groove is parallel to the axial direction of the screen body, and the length direction of the groove coincides with the radial direction of the screen body.
7. The sieve mechanism according to any one of claims 1 to 6, characterized in that, The screen mechanism also includes a bearing, and the screen body is rotatably mounted on the support via the bearing.
8. The screen mechanism according to claim 7, characterized in that, The bearings are fitted in pairs at both ends of the screen body along its own axis.
9. A rice milling device, characterized in that, Includes the screen mechanism as described in any one of claims 1 to 8.
10. A rice milling machine, characterized in that, Includes the rice milling apparatus as described in claim 9.