Granule picking substitute automatic sorting device

Abstract

The utility model discloses an automatic sorting device for picking up grains, which relates to the technical field of sorting devices and comprises a sorting box, supporting legs are respectively and fixedly connected to four corners of the outer wall of an outer fixing frame, a component conveying mechanism is arranged on the middle side of the front end of the sorting box, and a pushing mechanism is arranged at the left end of the outer fixing frame. Repeated sliding mechanisms are arranged on the upper sides of the opposite faces of the front supporting leg and the rear supporting leg correspondingly, mounting assemblies are arranged on the left side and the right side of the bottom of each repeated sliding mechanism correspondingly, a screening assembly is arranged at the tops of the two mounting assemblies, and mounting bases are fixedly arranged at the bottoms of the opposite faces of the front supporting leg and the rear supporting leg correspondingly; and a collecting frame is arranged at the tops of the four mounting seats. According to the automatic sorting device, granular materials are poured into the sorting box, so that the materials fall off in batches through the component conveying mechanism, and meanwhile, the materials with different sizes can be automatically classified through shaking by controlling the pushing mechanism.

Description

An automated sorting device for grain picking Technical Field

[0001] This utility model relates to the field of sorting device technology, specifically to an automated sorting device for granule picking. Background Technology

[0002] Sorting is the process of categorizing and stacking goods according to their type and the order in which they enter and leave the warehouse. Sorting is essential for improving delivery and supporting pre-delivery preparation. It is a necessary extension for different distribution companies to compete and improve their economic efficiency during delivery. Therefore, it can be said that sorting is a necessary requirement for the development of advanced delivery methods, and automated sorting systems are one of the essential facilities for advanced distribution centers. The following problems exist with existing technologies:

[0003] Currently, granular materials are typically sorted manually, which results in high labor intensity for workers and low sorting efficiency. Furthermore, it is inconvenient to install and disassemble material frames for different particle sizes when sorting granular materials, which affects the sorting effect. Summary of the Invention

[0004] This invention provides an automated sorting device for grain picking and processing, in order to solve the problems existing in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An automated sorting device for granule handling includes a sorting box, a feeding hopper fixedly connected to the top of the sorting box, an outer fixing frame fixedly connected to the bottom of the outer wall of the sorting box, support legs fixedly connected to the four corners of the outer wall of the outer fixing frame, a fixing frame fixedly connected to the front end of the sorting box, a weight conveying mechanism provided on the middle side of the front end of the sorting box, and the rear side of the outer wall of the weight conveying mechanism extending into the interior of the sorting box, a pushing mechanism provided on the left end of the outer fixing frame, a repetitive sliding mechanism provided on the upper side of the opposite faces of the front and rear support legs, mounting components provided on the left and right sides of the bottom of the repetitive sliding mechanism, a screening component provided on the top of the two mounting components, mounting seats fixedly provided on the bottom of the opposite faces of the front and rear support legs, a collection frame provided on the top of the four mounting seats, and a control panel provided on the left end of the sorting box.

[0007] A further improvement of this utility model is that the component conveying mechanism includes a drive motor, two driven gears, two bearings, two rotating rods, two rollers, and several dial plates. The output shaft of the drive motor is fixedly connected to the central shaft of the right gear. The two driven gears are respectively arranged on the upper side of the two gears. The central shaft of the rear end of the driven gear is rotatably connected to the front end of the bearing. The teeth on the two driven gears mesh with each other. The teeth on the left gear mesh with the teeth on the left gear, and the teeth on the right gear mesh with the teeth on the right gear. The central shaft of the rear end of the gear is fixedly connected to the front end of the rotating rod. The outer wall of the rotating rod is fixedly connected to the inside of the roller. One end of several dial plates is fixedly connected to the outer wall of the roller in a circular array. Several locking blocks are fixedly connected to the ends of several dial plates away from the roller at equal intervals. The locking blocks on the left and right dial plates engage with each other.

[0008] A further improvement of the present invention is that: the outer wall of the drive motor is fixedly connected to the inner wall of the fixed frame; the two gears are arranged on the same horizontal plane; the rear end of the bearing is fixedly connected to the front end of the sorting box; the rear end of the outer wall of the rotating rod extends through to the rear end of the inner wall of the sorting box and is rotatably connected thereto; and the roller is arranged inside the sorting box.

[0009] A further improvement of this utility model is that: the top left and right sides of the inner wall of the sorting box are respectively fixedly connected to buffer plate one, and the bottom left and right sides of the inner wall of the sorting box are respectively fixedly connected to buffer plate two.

[0010] A further improvement of this utility model is that: L-shaped slots are provided on the top of both the front and rear mounting seats; the outer wall of the collection frame near the four corners overlaps with the inside of the L-shaped slots; the pushing mechanism includes a mounting plate, a second drive motor, a turntable, and a protrusion; one end of the mounting plate is fixedly connected to the middle side of the left end of the outer fixing frame; the top of the second drive motor is fixedly connected to the bottom of the mounting plate; the output end of the second drive motor is fixedly connected to the central axis of the turntable; one end of the protrusion is fixedly connected to the outer wall of the turntable; and the outer wall of the protrusion overlaps with the outside of the screening assembly.

[0011] A further improvement of this utility model's technical solution is that: the repeated sliding mechanism includes a sliding rod, a return spring, a moving plate, and a positioning plate. The top of the positioning plate is fixedly connected to the right side of the bottom of the outer fixing frame. The left and right ends of the sliding rod are respectively fixedly connected to the opposite surfaces of the left support leg and the positioning plate. The outer wall of the sliding rod passes through the left and right ends of the moving plate and is slidably connected to them. The inside of the return spring is sleeved on the left side of the outer wall of the sliding rod. The left end of the return spring is fixedly connected to the inner wall of the left support leg. The right end of the return spring is fixedly connected to the left end of the moving plate.

[0012] A further improvement of the present invention is that the screening assembly includes a screening frame and a base plate. The bottom of the screening frame is provided with a vertically penetrating mounting opening. The outer wall of the base plate is fixedly connected to the inner wall of the mounting opening. The surface of the base plate is provided with a rectangular array of several vertically penetrating screening holes. Threaded holes are provided at the bottom of the front and rear ends of the screening frame.

[0013] A further improvement of this utility model's technical solution is that: the installation assembly includes a fixed plate, two clamping plates, a movable plate, a screw, and a knob; the bottoms of the two clamping plates are respectively fixedly connected to the top of the fixed plate near the outer side of the sieve frame; the tops of the two clamping plates are respectively fixedly connected to the bottom of the movable plate; the fixed plate has a vertically penetrating mounting groove on its middle side near the outer side of the sieve frame; the tops of the left and right ends of the movable plate are rotatably connected to the inner wall of the mounting groove; the middle of the movable plate has a front-to-back penetrating insertion hole; one end of the screw is fixedly connected to a knob; and the outer wall of the screw passes through the insertion hole and is threadedly connected to the inner wall of the threaded hole.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] This utility model provides an automated sorting device for granulation processing. It employs a combination of a sorting box, a weight conveying mechanism, a pushing mechanism, a repetitive sliding mechanism, a sieving component, and a collection frame. The weight conveying mechanism operates by pouring granular materials into the sorting box, causing the materials to fall in batches. Simultaneously, by controlling the pushing mechanism, the repetitive sliding mechanism drives the sieving component to repeatedly shake, automatically classifying materials of different sizes. This solves the problem of high labor intensity and low efficiency in the current method of manually sorting granular materials, achieving the beneficial effect of automating granulation processing and further reducing the labor intensity of workers.

[0016] This utility model provides an automated sorting device for granulation processing. It utilizes the cooperation between support legs, mounting base, and mounting components. When disassembling and assembling the screening component and collection frame, the mounting component is first separated from the screening component by unscrewing the knob from the threaded hole in the screening component. The screening component can then be removed, and the collection frame can be taken out from the mounting base. This solves the problem of inconvenience in assembling and disassembling material frames of different particle sizes when sorting granular materials, which affects the sorting effect. It achieves the beneficial effect of facilitating the assembly and disassembly of the screening component and mounting base. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of the automated sorting device for granule picking in this utility model.

[0018] Figure 2 is a three-dimensional structural diagram of the component conveying mechanism of this utility model;

[0019] Figure 3 is a schematic cross-sectional view of the three-dimensional structure of the sorting box of this utility model;

[0020] Figure 4 is a three-dimensional structural diagram of the pushing mechanism and the repeated sliding mechanism of this utility model;

[0021] Figure 5 is a three-dimensional structural diagram of the installation component and the screening component of this utility model.

[0022] In the diagram: 1. Sorting box; 2. External fixing frame; 3. Support leg; 4. Fixing frame; 5. Weight conveying mechanism; 51. Drive motor one; 52. Gear; 53. Driven gear; 54. Bearing; 55. Rotating rod; 56. Roller; 57. Paddle plate; 58. Locking block; 6. Pushing mechanism; 61. Mounting plate; 62. Drive motor two; 63. Turntable; 64. Protrusion; 7. Repeated sliding mechanism; 71. Sliding rod; 72. Return spring; 73. Moving plate; 74. 8. Positioning plate; 81. Mounting assembly; 81. Fixing plate; 810. Mounting slot; 82. Clamping plate; 83. Movable plate; 830. Insertion hole; 84. Screw; 85. Knob; 9. Screening assembly; 91. Screening frame; 910. Mounting port; 911. Threaded hole; 92. Base plate; 920. Screening hole; 10. Mounting base; 1001. L-shaped slot; 11. Feed hopper; 12. Collection frame; 13. Control panel; 14. Buffer plate one; 15. Buffer plate two. Detailed Implementation

[0023] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments:

[0024] As shown in Figure 1, this utility model provides an automated sorting device for granule handling, including a sorting box 1, a feeding hopper 11 fixedly connected to the top of the sorting box 1, an outer fixing frame 2 fixedly connected to the bottom of the outer wall of the sorting box 1, support legs 3 fixedly connected to the four corners of the outer wall of the outer fixing frame 2, a fixing frame 4 fixedly connected to the front end of the sorting box 1, a weight conveying mechanism 5 provided on the middle side of the front end of the sorting box 1, and the rear side of the outer wall of the weight conveying mechanism 5 extending into the interior of the sorting box 1, a pushing mechanism 6 provided on the left end of the outer fixing frame 2, a repetitive sliding mechanism 7 provided on the upper side of the opposite face of the front and rear support legs 3, mounting components 8 designed on the left and right sides of the bottom of the repetitive sliding mechanism 7, a screening component 9 provided on the top of the two mounting components 8, mounting seats 10 fixedly provided on the bottom of the opposite face of the front and rear support legs 3, a collection frame 12 provided on the top of the four mounting seats 10, and a control panel 13 provided on the left end of the sorting box 1.

[0025] The system consists of a sorting box 1, a weight conveying mechanism 5, a pushing mechanism 6, a reciprocating sliding mechanism 7, an installation component 8, a screening component 9, a mounting base 10, a feed hopper 11, and a collection frame 12. Through the coordinated operation of the sorting box 1 and the weight conveying mechanism 5, the incoming granular materials can be conveyed in batches, avoiding the situation where materials are directly poured into the container and accumulate. Then, through the coordinated operation of the pushing mechanism 6, the reciprocating sliding mechanism 7, and the installation component 8, the screening component 9 is installed and fixed on the installation component 8. Finally, by operating the pushing mechanism 6, the screening component 9 is driven to repeatedly shake left and right, thereby screening and classifying the granular materials according to their size.

[0026] As shown in Figure 2, this utility model provides a technical solution for an automated sorting device for granule handling: the weight conveying mechanism 5 includes a drive motor 51, two driven gears 53, two bearings 54, two rotating rods 55, two rollers 56, and several paddles 57. The output shaft of the drive motor 51 is fixedly connected to the central shaft of the right gear 52. The two driven gears 53 are respectively arranged on the upper side of the two gears 52. The central shaft of the rear end of the driven gear 53 is rotatably connected to the front end of the bearing 54. The teeth on the two driven gears 53 mesh with each other. The teeth on the left gear 52 mesh with each other, and the teeth on the right gear 52 mesh with each other. By setting two driven gears 53 between the two gears 52, after the drive motor 51 drives the gear 52 on one side to rotate, the weight conveying mechanism 5 can be connected to the gear 52 through the gear 52 and the driven gear 53. The meshing of the gears drives the gear 52 on the other side to rotate in the opposite direction. The central shaft at the rear end of the gear 52 is fixedly connected to the front end of the rotating rod 55. The outer wall of the rotating rod 55 is fixedly connected to the inside of the roller 56. One end of several paddles 57 is fixedly connected to the outer wall of the roller 56 in a circular array. Several paddles 57 are fixedly connected to several locking blocks 58 at equal intervals at the ends away from the roller 56. The locking blocks 58 on the left and right paddles 57 engage with each other. During the rotation of the roller 56, the paddles 57 on both sides of the roller 56 perform the effect of conveying the falling materials in weight. The outer wall of the drive motor 51 is fixedly connected to the inner wall of the fixed frame 4. The two gears 52 are set on the same horizontal plane. The rear end of the bearing 54 is fixedly connected to the front end of the sorting box 1. The rear end of the outer wall of the rotating rod 55 extends through to the rear end of the inner wall of the sorting box 1 and is rotatably connected between them. The roller 56 is set inside the sorting box 1.

[0027] As shown in Figure 3, this utility model provides a technical solution for an automated sorting device for granule handling: the top left and right sides of the inner wall of the sorting box 1 are respectively fixedly connected to buffer plate 14, and the bottom left and right sides of the inner wall of the sorting box 1 are respectively fixedly connected to buffer plate 25. Buffer plate 14 and buffer plate 25 are installed on the upper and lower sides of the inner wall of the sorting box 1 to buffer the falling materials.

[0028] As shown in Figure 4, this utility model provides a technical solution for an automated sorting device for granule handling: L-shaped slots 1001 are provided on the top of both the front and rear mounting bases 10. The outer walls of the collection frame 12 near its four corners overlap with the interior of the L-shaped slots 1001. The pushing mechanism 6 includes a mounting plate 61, a second drive motor 62, a turntable 63, and protrusions 64. One end of the mounting plate 61 is fixedly connected to the middle side of the left end of the outer fixing frame 2. The top of the second drive motor 62 is fixedly connected to the bottom of the mounting plate 61. The output end of the second drive motor 62 is fixedly connected to the central axis of the turntable 63. One end of the protrusion 64 is fixedly connected to the outer wall of the turntable 63. The outer wall of the protrusion 64 overlaps the outside of the screening assembly 9. The second drive motor 62 drives the turntable 63 to rotate, thereby repeatedly pushing the protrusion 64 against the screening assembly 9. The repeated sliding mechanism 7 includes a slide rod 71, a return spring 72, a moving plate 73, and a positioning plate 74. The top of the positioning plate 74 is fixedly connected to the right side of the bottom of the outer fixed frame 2. The left and right ends of the slide rod 71 are respectively fixedly connected to the opposite surfaces of the left support leg 3 and the positioning plate 74. The outer wall of the slide rod 71 passes through the left and right ends of the moving plate 73 and is slidably connected between them. The moving plate 73 slides along the outer wall of the slide rod 71, which limits the shaking trajectory of the screening assembly 9. The inside of the return spring 72 is sleeved on the left side of the outer wall of the slide rod 71. The left end of the return spring 72 is fixedly connected to the inner wall of the left support leg 3, and the right end of the return spring 72 is fixedly connected to the left end of the moving plate 73. When the protrusion 64 is disengaged from the screening assembly 9, the elasticity of the return spring 72 can quickly reset the screening assembly 9.

[0029] As shown in Figure 5, this utility model provides a technical solution for an automated sorting device for particle handling: the sieving component 9 includes a sieving frame 91 and a base plate 92. The bottom of the sieving frame 91 has a vertically penetrating mounting port 910. The outer wall of the base plate 92 is fixedly connected to the inner wall of the mounting port 910. The surface of the base plate 92 has a rectangular array of vertically penetrating sieving holes 920. The sieving holes 920 on the base plate 92 can discharge particles smaller than the inner diameter of the sieving holes 920. Threaded holes 911 are respectively opened at the bottom of the front and rear ends of the sieving frame 91. The mounting component 8 includes a fixed plate 81, two clamping plates 82, a movable plate 83, a screw 84, and a knob 85. The two clamping plates 81 and 82 are respectively provided in the mounting component 8. The bottom of the two plates 82 are fixedly connected to the top of the fixed plate 81 near the outer side of the screening frame 91. The tops of the two plates 82 are fixedly connected to the bottom of the movable plate 73. The fixed plate 81 has a vertically through mounting groove 810 on the middle side near the outside of the screening frame 91. The tops of the left and right ends of the movable plate 83 are rotatably connected to the inner wall of the mounting groove 810. The middle of the movable plate 83 has a through insertion hole 830. One end of the screw 84 is fixedly connected to a knob 85. The outer wall of the screw 84 passes through the insertion hole 830 and is threaded to the inner wall of the threaded hole 911. The screw 84 is inserted through the insertion hole 830 and screwed into the threaded hole 911, thereby fixing the screening frame 91 on the fixed plate 81.

[0030] The working principle of this automated sorting device for grain picking is explained in detail below.

[0031] As shown in Figures 1-5, when using this automated sorting device to sort granular materials by size, firstly, the control panel 13 is connected to an external power source via wires. The control panel 13 is then activated to start drive motor 51 and drive motor 62. The output shaft of drive motor 51 drives the right-side gear 52 to rotate, which in turn drives the two driven gears 53 above to rotate, causing the right-side gear 52 to rotate in the opposite direction. This, in turn, drives the two rollers 56 to rotate in opposite directions via the rotating rod 55. Then, the material is poured into the sorting box 1 through the feed hopper 11. After being buffered by the buffer plate 14, the material is then divided into batches by the rotating baffles 57 on both sides and falls along the buffer plate 15 into the screening frame 91. The output shaft of drive motor 62 drives the turntable 63 to rotate. The movement causes repeated pushing of the outer surface of the screening frame 91. The screening frame 91 slides along the slide bar 71 via the moving plates 73 on both sides. When the protrusion 64 disengages from the surface of the screening frame 91, the elasticity of the return spring 72 drives the screening frame 91 to move quickly back to its original position, thereby shaking the screening frame 91 left and right. During the continuous shaking, smaller particles in the screening frame 91 fall into the collection frame 12 through the screening holes 920 and are collected. After sorting, by rotating the knobs 85 on both sides outward, the screw 84 is disengaged from the threaded hole 911 and removed. The moving plate 83 hangs down along the mounting groove 810, so that the screening frame 91 can be removed to the right. Then, the collection frame 12 is lifted up and removed from the L-shaped slot 1001, thus completing the automated sorting of granular materials.

[0032] The control panel and drive motor used are existing products in terms of type and structure, and the specific circuit connection structure and control relationship between the control panel and drive motor are also existing technologies, which will not be elaborated on here.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An automated sorting device for grain picking and processing, comprising a sorting box (1), characterized in that: The top of the sorting box (1) is fixedly connected to a feed hopper (11), the bottom of the outer wall of the sorting box (1) is fixedly connected to an outer fixing frame (2), the outer wall of the outer fixing frame (2) is fixedly connected to four corners, the front end of the sorting box (1) is fixedly connected to a fixing frame (4), a weight conveying mechanism (5) is provided on the middle side of the front end of the sorting box (1), and the rear side of the outer wall of the weight conveying mechanism (5) extends into the interior of the sorting box (1). The left end of the outer fixing frame (2) is provided with a pusher. The mechanism (6) has a repetitive sliding mechanism (7) on the upper side of the opposite face of the two front and rear support legs (3), and an installation component (8) on the left and right sides of the bottom of the repetitive sliding mechanism (7). A sieve component (9) is provided on the top of the two installation components (8). An installation seat (10) is fixedly provided on the bottom of the opposite face of the two front and rear support legs (3). A collection frame (12) is provided on the top of the four installation seats (10). A control panel (13) is provided on the left end of the sorting box (1).

2. The kind of grain sub-contracted automation sorting device according to claim 1, its characterized in that: The component conveying mechanism (5) includes a drive motor (51), two driven gears (53), two bearings (54), two rotating rods (55), two rollers (56), and several levers (57). The output shaft of the drive motor (51) is fixedly connected to the central shaft of the right gear (52). The two driven gears (53) are respectively arranged on the upper side of the two gears (52). The central shaft of the rear end of the driven gear (53) is rotatably connected to the front end of the bearing (54). The teeth on the two driven gears (53) mesh with each other. The teeth on the left gear (52) mesh with the teeth on the left side. The teeth on the gear (52) mesh with each other, and the teeth on the right gear (52) mesh with each other. The central shaft at the rear end of the gear (52) is fixedly connected to the front end of the rotating rod (55). The outer wall of the rotating rod (55) is fixedly connected to the inside of the roller (56). One end of several dial plates (57) is fixedly connected to the outer wall of the roller (56) in a circular array. Several locking blocks (58) are fixedly connected at equal intervals on the ends of several dial plates (57) away from the roller (56). The locking blocks (58) on the left and right dial plates (57) engage with each other.

3. The kind of grain sub-contracted automation sorting device according to claim 2, characterized in that: The outer wall of the drive motor (51) is fixedly connected to the inner wall of the fixed frame (4), the two gears (52) are set on the same horizontal plane, the rear end of the bearing (54) is fixedly connected to the front end of the sorting box (1), the rear end of the outer wall of the rotating rod (55) extends through to the rear end of the inner wall of the sorting box (1) and is rotatably connected between them, and the roller (56) is set inside the sorting box (1).

4. The kind of grain sub-contracted automation sorting device according to claim 1, characterized in that: The top left and right sides of the inner wall of the sorting box (1) are fixedly connected to the first buffer plate (14), and the bottom left and right sides of the inner wall of the sorting box (1) are fixedly connected to the second buffer plate (15).

5. The kind of grain sub-contracted automation sorting device according to claim 1, characterized in that: The top of both the front and rear mounting bases (10) are provided with L-shaped slots (1001). The outer wall of the collection frame (12) near the four corners overlaps with the inside of the L-shaped slots (1001). The pushing mechanism (6) includes a mounting plate (61), a second drive motor (62), a turntable (63), and a protrusion (64). One end of the mounting plate (61) is fixedly connected to the middle side of the left end of the outer fixing frame (2). The top of the second drive motor (62) is fixedly connected to the bottom of the mounting plate (61). The output end of the second drive motor (62) is fixedly connected to the central axis of the turntable (63). One end of the protrusion (64) is fixedly connected to the outer wall of the turntable (63). The outer wall of the protrusion (64) overlaps with the outside of the screening assembly (9).

6. The automated sorting device for granule handling according to claim 1, characterized in that: The repeated sliding mechanism (7) includes a slide rod (71), a return spring (72), a moving plate (73), and a positioning plate (74). The top of the positioning plate (74) is fixedly connected to the right side of the bottom of the outer fixing frame (2). The left and right ends of the slide rod (71) are respectively fixedly connected to the opposite sides of the left support leg (3) and the positioning plate (74). The outer wall of the slide rod (71) passes through the left and right ends of the moving plate (73) and is slidably connected between them. The inside of the return spring (72) is sleeved on the left side of the outer wall of the slide rod (71). The left end of the return spring (72) is fixedly connected to the inner wall of the left support leg (3). The right end of the return spring (72) is fixedly connected to the left end of the moving plate (73).

7. The automated sorting device for granule handling according to claim 1, characterized in that: The sieving assembly (9) includes a sieving frame (91) and a base plate (92). The bottom of the sieving frame (91) is provided with an installation port (910) that runs vertically through it. The outer wall of the base plate (92) is fixedly connected to the inner wall of the installation port (910). The surface of the base plate (92) is provided with a rectangular array of several sieving holes (920) that run vertically through it. The bottom of the front and rear ends of the sieving frame (91) is provided with threaded holes (911).

8. The automated sorting device for granule handling according to claim 1, characterized in that: The mounting assembly (8) includes a fixed plate (81), two clamping plates (82), a movable plate (83), a screw (84), and a knob (85). The bottoms of the two clamping plates (82) are fixedly connected to the top of the fixed plate (81) near the outer side of the sieve frame (91). The tops of the two clamping plates (82) are fixedly connected to the bottom of the movable plate (73). The fixed plate (81) has a vertically penetrating mounting groove (810) on the middle side near the outer side of the sieve frame (91). The tops of the left and right ends of the movable plate (83) are rotatably connected to the inner wall of the mounting groove (810). The middle part of the movable plate (83) has a front-to-back penetrating insertion hole (830). One end of the screw (84) is fixedly connected to the knob (85). The outer wall of the screw (84) passes through the insertion hole (830) and is threadedly connected to the inner wall of the threaded hole (911).

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