Corn seed screening mechanism

Abstract

The utility model belongs to the technical field of seed processing, and particularly relates to a corn seed screening mechanism which comprises a box body and a vibration screening device, the box body is provided with a feeding port, a discharging port and a limiting groove, and the vibration screening device comprises a first vibration screening assembly, a second vibration screening assembly and a servo motor. Each vibrating screen assembly comprises a vibrating screen frame, a cam roller and a guide rod, each vibrating screen frame comprises a screen mesh and a frame body, a fixed frame is arranged outside each screen mesh, a connecting block is arranged outside each frame body and located in the corresponding limiting groove, rolling wheels are arranged at the bottom of each frame body, the cam rollers are located below the vibrating screen frames, and the tops of the cam rollers abut against the bottoms of the rolling wheels. The guide rods are arranged in the limiting grooves and penetrate through the connecting blocks, and roller shafts of the two cam rollers in the two vibrating screen assemblies are both in transmission connection with an output shaft of the servo motor. Through two-stage screening, the device is high in screening efficiency and good in screening effect; and the vibrating screen frame adopts a split structure, so that the screen mesh is convenient to replace, and the discharging is also very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of seed processing, and in particular relates to a corn seed screening mechanism. Background Art

[0002] In order to improve the quality and purity of corn seeds and ensure the health and uniformity of the seeds, corn seeds need to be screened before sowing to screen out debris mixed in the seeds, such as mud, corn cobs, and incomplete grains and small seeds.

[0003] At present, the existing screening machines perform multi-stage screening of corn seeds by setting screens of different sizes inside, but the screens are generally fixed inside the device, which is not convenient for removal and replacement, and it is not convenient to discharge the material after the screening is completed.

[0004] Therefore, improvements are urgently needed. Utility Model Content

[0005] In view of the above-mentioned defects existing in the prior art, the utility model provides a corn seed screening mechanism, including a box body and a vibrating screening device, wherein a loading port is provided on the top of the box body, and a unloading port is provided on the bottom of the box body. The vibrating screening device includes a first vibrating screening component and a second vibrating screening component arranged inside the box body, and a servo motor arranged outside the box body, the first vibrating screening component and the second vibrating screening component are opposite to each other up and down, and limiting grooves are provided at positions corresponding to the two vibrating screening components on the left and right side walls of the box body, the first vibrating screening component and the second vibrating screening component both include a vibrating screen frame, a cam roller and a guide rod vertically arranged in the limiting groove, the vibrating screen frame includes a screen mesh and a frame body arranged inside and outside, a fixed frame is provided outside the screen mesh, and the shape of the fixed frame matches the inner cavity of the frame body, and frame edges are provided around the top of the fixed frame, and the frame edges are placed on the frame body to provide support for the fixed frame; the frame body Connecting blocks are fixed on the left and right sides, and the connecting blocks are located in the corresponding limit grooves. A mounting plate is provided at the bottom of the frame, and two rollers are provided under the mounting plate, and the mounting plate can also provide support for the fixed frame; bolt holes are provided on the frame edge and the frame body of the fixed frame, and the two can be fixed together by butterfly bolts for easy disassembly and assembly; a handle can also be provided on the frame edge for easy taking of the fixed frame and the screen; the cam roller is located under the vibrating screen frame, and the top of the cam roller abuts against the bottom of the two rollers. Roller shafts are fixed on the left and right ends of the cam roller, and the roller shafts are rotatably connected to the side walls of the box body, and the guide rod passes through the connecting block, and the roller shafts of the two cam rollers in the two vibrating screening assemblies are transmission-connected to the output shaft of the servo motor.

[0006] Optionally, two circles of grooves are provided on the roller surface of the cam roller in the circumferential direction, and the positions of the two circles of grooves correspond to the two rollers respectively.

[0007] Specifically, the width of the groove is slightly larger than the width of the roller, which is used to position the roller and improve the stability when the two rotate.

[0008] Optionally, a door is provided at the front end of the box body, and an observation window is provided on the door.

[0009] Specifically, the observation window facilitates the staff to check the operation of the equipment inside the box body.

[0010] Optionally, a ramp is provided at the bottom of the box body.

[0011] Specifically, the ramp facilitates the discharging of materials.

[0012] Optionally, legs are provided below the box body.

[0013] Optionally, the aperture of the screen mesh in the first vibrating screening assembly is larger than the aperture of the screen mesh in the second vibrating screening assembly.

[0014] Specifically, the first vibrating screening assembly is used to screen out large debris in corn seeds, such as mud blocks, corn cob cores, sand grains, etc., and the second vibrating screening assembly is used to screen out small debris in corn seeds, such as weed seeds, glumes, shriveled grains, empty grains and small seeds, etc.

[0015] Optionally, a spring is connected between the top wall of the limit groove and the connecting block.

[0016] Specifically, the spring can play a buffering role in the movement of the connecting block on the guide rod.

[0017] Optionally, a support frame is provided at the bottom of the servo motor.

[0018] The present utility model further includes other components that can enable a corn seed screening mechanism to be used normally, which are all conventional technical means in the art. In addition, the devices or components not defined in the present utility model all adopt conventional technical means in the art, such as servo motors.

[0019] The working principle of the present utility model is as follows: Corn seeds are put into the box from the feeding port. The servo motor is started to drive the rotation of two cam rollers in two vibration screening components, thereby periodically pushing two vibrating sieve frames to move up and down reciprocally. The guide rods and connecting blocks can provide guidance for the movement of the vibrating sieve frames. In this way, under the two-stage vibration screening action of the two vibration screening components, large debris in the corn seeds will be filtered out on the sieve mesh of the first vibration screening component, and small debris in the corn seeds will pass through the sieve mesh of the second vibration screening component and fall off, and be discharged from the discharge port. Only plump, large-grained, and high-quality corn seeds remain on the sieve mesh of the second vibration screening component. The staff opens the box door, removes the wing bolts, takes out the fixed frame and the sieve mesh from the box body, pours out the qualified corn seeds, and at the same time clears away the large debris. Finally, the fixed frame is reinstalled into the box body to start the next round of screening work.

[0020] The beneficial effects of the present utility model are as follows: Through two-stage screening, the debris in the corn seeds can be screened out, with high screening efficiency and good effect; the vibrating sieve frame adopts a split structure, and the connection structure between the box body and the fixed frame with the sieve mesh is detachable, which is convenient for disassembly and assembly and for replacing the sieve mesh. The staff only needs to remove the wing bolts to take out the sieve mesh, which is convenient for discharging materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0023] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of part A in

[0024] Figure 3 It is a schematic diagram of the structure of the vibrating sieve frame of the present utility model.

[0025] Figure 4 is Figure 3 an exploded view of

[0026] Figure 5 It is a schematic diagram of the structure of the cam roller of the present utility model.

[0027] In the figure: 1. Box body, 2. First vibration screening component, 3. Second vibration screening component, 4. Servo motor, 5. Limit groove, 6. Vibrating sieve frame, 7. Cam roller, 8. Guide rod, 9. Sieve mesh, 10. Box body, 11. Fixed frame, 12. Box edge, 13. Connecting block, 14. Mounting plate, 15. Roller, 16. Wing bolt, 17. Roller shaft, 18. Groove, 19. Spring, 20. Box door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present utility model and specific embodiments. The description here is only used to explain the present utility model, but not to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present utility model.

[0029] Embodiment

[0030] Such as Figures 1-5As shown in the figure, an embodiment of the present utility model provides a corn seed screening mechanism, including a box body 1 and a vibration screening device. A feeding port is provided at the top of the box body 1, and a discharging port is provided at the bottom of the box body 1. The vibration screening device includes a first vibration screening component 2 and a second vibration screening component 3 arranged inside the box body 1, and a servo motor 4 arranged outside the box body 1. The first vibration screening component 2 and the second vibration screening component 3 are relatively arranged up and down. Limiting grooves 5 are provided at positions corresponding to the two vibration screening components on the left and right side walls of the box body 1. Both the first vibration screening component 2 and the second vibration screening component 3 include a vibration screen frame 6, a cam roller 7, and a guide rod 8 vertically arranged in the limiting groove 5. The vibration screen frame 6 includes a screen mesh 9 and a frame body 10 arranged inside and outside. A fixed frame 11 is arranged outside the screen mesh 9, and the outer shape of the fixed frame 11 matches the inner cavity of the frame body 10. Frames 12 are provided around the top of the fixed frame 11, and the frames 12 are placed on the frame body 10 to provide support for the fixed frame 11; connecting blocks 13 are fixed on both the left and right sides of the frame body 10, and the connecting blocks 13 are located in the corresponding limiting grooves 5. A mounting plate 14 is arranged at the bottom of the frame body 10, and two rollers 15 are arranged below the mounting plate 14. The mounting plate 14 can also provide support for the fixed frame 11; bolt holes are provided on both the frames 12 of the fixed frame 11 and the frame body 10, and the two can be fixed together through a wing bolt 16, which is convenient for disassembly and assembly; a handle can also be arranged on the frames 12 to facilitate taking the fixed frame 11 and the screen mesh 9; the cam roller 7 is located below the vibration screen frame 6, the top of the cam roller 7 abuts against the bottoms of the two rollers 15, both the left and right ends of the cam roller 7 are fixed with roller shafts 17, and the roller shafts 17 are rotatably connected to the side wall of the box body 1. Two circles of grooves 18 are arranged along the circumferential direction on the roller surface of the cam roller 7, and the positions of the two circles of grooves 18 correspond to the two rollers 15 respectively. The width of the grooves 18 is slightly larger than the width of the rollers 15, which is used to provide positioning for the rollers 15 and improve the stability during their rotation; the guide rod 8 penetrates through the connecting block 13, and a spring 19 is connected between the top wall of the limiting groove 5 and the connecting block 13. The spring 19 can play a buffering role in the movement of the connecting block 13 on the guide rod 8; the roller shafts 17 of the two cam rollers 7 in the two vibration screening components are all drivingly connected to the output shaft of the servo motor 4; the aperture of the screen mesh 9 in the first vibration screening component 2 is larger than the aperture of the screen mesh 9 in the second vibration screening component 3. The first vibration screening component 2 is used to screen out large debris in the corn seeds, such as mud blocks, corn cob cores, sand grains, etc., and the second vibration screening component 3 is used to screen out small debris in the corn seeds, such as weed seeds, glumes, shriveled grains, empty grains, and small seeds, etc.

[0031] In addition, a box door 20 is provided at the front end of the box body 1, and an observation window is provided on the box door 20. The observation window facilitates the staff to check the operation of the equipment inside the box body 1. A slope is provided at the bottom of the box body 1, and the slope is convenient for discharging. Legs are provided below the box body 1. A support frame is provided at the bottom of the servo motor 4.

[0032] The working principle of the present utility model is as follows: Corn seeds are put into the box body 1 from the feeding port. The servo motor 4 is started to drive the two cam rollers 7 in the two vibration screening components to rotate, thereby periodically pushing the two vibration sieve frames 6 to perform reciprocating up and down movements. The guide rods 8 and the connecting blocks 13 can provide guidance for the movement of the vibration sieve frames 6. In this way, under the two-stage vibration screening action of the two vibration screening components, large debris in the corn seeds will be filtered out on the screen 9 in the first vibration screening component 2, and small debris in the corn seeds will pass through the screen 9 in the second vibration screening component 3 and fall off, and be discharged from the discharge port. Only plump, large-grained, and high-quality corn seeds remain on the screen 9 in the second vibration screening component 3. The staff opens the box door 20, removes the butterfly bolts 16, takes out the fixed frame 11 and the screen 9 from the frame body 10, pours out the qualified corn seeds, and at the same time clears away the large debris. Finally, the fixed frame 11 is reinstalled into the frame body 10 to start the next round of screening work.

[0033] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A corn seed screening mechanism, comprising a box body and a vibration screening device, characterized in that: A loading port is provided on the top of the box body, and a unloading port is provided on the bottom of the box body; the vibrating screening device comprises a first vibrating screening assembly and a second vibrating screening assembly arranged inside the box body, and a servo motor arranged outside the box body, the first vibrating screening assembly and the second vibrating screening assembly are opposite to each other up and down, and position limit grooves are provided at positions corresponding to the two vibrating screening assemblies on the left and right side walls of the box body, the first vibrating screening assembly and the second vibrating screening assembly each comprise a vibrating screen frame, a cam roller and a guide rod vertically arranged in the limit groove, the vibrating screen frame comprises a screen mesh and a frame body arranged inside and outside, and the screen mesh is arranged outside A fixed frame is provided, and the shape of the fixed frame matches the inner cavity of the frame. Frame edges are provided around the top of the fixed frame. Connecting blocks are fixed on the left and right sides of the frame, and the connecting blocks are located in corresponding limit grooves. A mounting plate is provided at the bottom of the frame, and two rollers are provided below the mounting plate. The cam roller is located below the vibrating screen frame, and the top of the cam roller abuts against the bottom of the two rollers. Roller shafts are fixed at both ends of the cam roller, and the roller shafts are rotatably connected to the side walls of the box. The guide rod passes through the connecting block, and the roller shafts of the two cam rollers in the two vibrating screening assemblies are both drivingly connected to the output shaft of the servo motor.

2. The corn seed screening mechanism according to claim 1, characterized in that: Two circles of grooves are arranged on the roller surface of the cam roller in the circumferential direction, and the positions of the two circles of grooves correspond to the two rollers respectively.

3. The corn seed screening mechanism according to claim 2, characterized in that: A box door is arranged at the front end of the box body, and an observation window is arranged on the box door.

4. The corn seed screening mechanism according to claim 3, wherein: The bottom of the box is provided with a slope.

5. The corn seed screening mechanism according to claim 4, characterized in that: Support legs are arranged below the box body.

6. The corn seed screening mechanism according to claim 5, characterized in that: The aperture size of the screen in the first vibrating screening assembly is larger than the aperture size of the screen in the second vibrating screening assembly.

7. The corn seed screening mechanism according to claim 6, characterized in that: A spring is connected between the top wall of the limiting groove and the connecting block.

8. The corn seed screening mechanism according to claim 7, wherein: A supporting frame is arranged at the bottom of the servo motor.

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