Watermelon seed screening device

Abstract

The utility model discloses a watermelon cultivation seed screening device relates to watermelon cultivation technical field, including support support, the top left side of support support is fixed and installed with feed inlet, the bottom of feed inlet is fixedly installed with guide port, the below of guide port is provided with screening box, the top of support support's two sides is fixedly installed with the bearing cross -board. The utility model discloses through setting servo motor drive main gear, again through transmission toothed belt drive pinion and rotating lever rotation, makes the guide roll in guide port synchronous rotation, and the shunt groove on guide roll can divide the watermelon seed that surges from feed inlet into multiple strands, and evenly transports to screening box, avoids the local accumulation of seed in screening box, and servo motor drives drive rod, and the movement of rotating short board and push -pull link, cooperate with swing lever and the support of pivot no.

Description

Technical Field

[0001] This utility model relates to the field of watermelon cultivation technology, specifically to a seed screening device for watermelon cultivation. Background Technology

[0002] Watermelon, a summer delicacy, is known for its sweet flesh. It not only brings a refreshing and cooling experience, but its seeds are also rich in oil, and its rind has medicinal value. In the process of watermelon cultivation, seedling raising is a crucial step, and the quality of the seeds is the key factor that determines the germination rate.

[0003] In the prior art, a Chinese patent document with publication number CN218924939U and publication date of April 8, 2023 was proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: a seed screening device for watermelon planting, including a base plate, a box body fixedly connected to the upper surface of the base plate, a feed inlet on the upper surface of the box body, a screen fixedly connected to the inner wall of the box body, a water tank fixedly connected to the right side of the box body, and a first discharge port on the right side of the water tank.

[0004] To address the problem of seed screening, existing technologies use vibrating motors and screens for preliminary screening. However, when seeds are fed into the hopper, they flow directly onto the screen. This concentrated feeding method causes seeds to accumulate locally on the screen, making it difficult to distribute them evenly. This results in incomplete screening and reduced screening quality. Utility Model Content

[0005] The purpose of this invention is to provide a seed screening device for watermelon cultivation to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A seed screening device for watermelon cultivation includes a support frame, a feeding hopper fixedly installed on the upper left side of the support frame, a guide port fixedly installed at the bottom of the feeding hopper, a screening box arranged below the guide port, and load-bearing horizontal plates fixedly installed at the top of the front and rear sides of the support frame.

[0008] A rotating shaft is fixedly installed on both sides of the bottom end of the bearing plate. A rocking rod is rotatably connected to the inner axis of the rotating shaft, and the other end of the rocking rod is rotatably connected to the two side shells of the screening box.

[0009] A further improvement of this utility model is that: a screening screen is fixedly installed in the middle of the inner wall of the screening box, a discharge port one is fixedly installed at the left side of the other end of the screening screen, and a discharge port two is fixedly installed at the bottom of the screening box below the screening screen on the right side.

[0010] A further improvement of this utility model is that a servo motor is fixedly installed on the front left side of the support bracket, a main gear is fixedly connected to the output end of the servo motor, a drive rod is fixedly installed on the output end of the main gear, and a rotating short plate is fixedly sleeved on the other end of the drive rod. The model of the servo motor is MSMD042G1U.

[0011] A further improvement of this utility model is that a push-pull rod is rotatably sleeved on the other end of the rotating short plate, and a second rotating shaft is rotatably connected to the other end of the push-pull rod. The second rotating shaft is fixedly installed on the bottom shell of the screening box.

[0012] A further improvement of this utility model is that a transmission toothed belt is also meshed and sleeved on the outer surface of the main gear, and a driven gear is meshed and sleeved on the other end of the transmission toothed belt.

[0013] A further improvement of this utility model is that a rotating rod is fixedly connected to the output end of the gear, and the other end of the rotating rod extends into the front end of the guide port.

[0014] A further improvement of this utility model is that a guide roller is fixedly sleeved inside the guide port on the outer surface of the rotating rod, and a flow-dividing groove is formed on the outer surface of the guide roller around its perimeter.

[0015] 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:

[0016] 1. This utility model provides a seed screening device for watermelon cultivation. By setting a servo motor to drive the main gear, and then driving the driven gear and rotating rod to rotate through the transmission tooth belt, the guide roller in the guide port rotates synchronously. The diversion groove on the guide roller can separate the watermelon seeds flowing from the feed hopper into multiple streams and transport them evenly to the screening box, avoiding local accumulation of seeds in the screening box.

[0017] 2. This utility model provides a seed screening device for watermelon cultivation. By setting a servo motor to drive the drive rod, rotating short plate and push-pull rod to move, and with the support of the swing rod and the rotating shaft, the screening box swings back and forth, allowing the evenly falling seeds to shake fully on the screening screen, effectively reducing screening dead corners caused by seed accumulation and improving screening thoroughness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the rear side of the screening box structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the screening mesh structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the bottom of the screening box structure of this utility model;

[0022] Figure 5 This is a cross-sectional schematic diagram of the feed hopper structure of this utility model.

[0023] In the diagram: 1. Support bracket; 11. Servo motor; 12. Main gear; 121. Transmission belt; 122. Driven gear; 123. Rotating rod; 124. Guide roller; 125. Diverter trough; 13. Drive rod; 14. Rotating short plate; 15. Push-pull rod; 16. Rotating shaft two; 2. Feed hopper; 21. Guide port; 3. Screening box; 31. Screening screen; 32. Discharge port one; 33. Discharge port two; 4. Bearing cross plate; 41. Rotating shaft one; 42. Swing rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1-5As shown, this utility model provides a seed screening device for watermelon cultivation, including a support bracket 1. A feeding hopper 2 is fixedly installed on the top left side of the support bracket 1. A guide port 21 is fixedly installed at the bottom end of the feeding hopper 2. A screening box 3 is arranged below the guide port 21. A bearing plate 4 is fixedly installed at the top of both the front and rear sides of the support bracket 1. A rotating shaft 41 is fixedly installed on both sides of the bottom end of the bearing plate 4. A rocker arm 42 is rotatably connected to the inner axis of the rotating shaft 41. The other end of the rocker arm 42... A servo motor 11 is fixedly installed on the front left side of the support bracket 1, which is rotatably connected to the two side shells of the screening box 3. A main gear 12 is fixedly connected to the output end of the servo motor 11, and a drive rod 13 is fixedly installed on the output end of the main gear 12. A rotating short plate 14 is fixedly sleeved on the other end of the drive rod 13, and a push-pull rod 15 is rotatably sleeved on the other end of the rotating short plate 14. A rotating shaft 16 is rotatably connected to the other end of the push-pull rod 15, and the rotating shaft 16 is fixedly installed on the bottom shell of the screening box 3.

[0027] Furthermore, when the drive rod 13 rotates with the main gear 12, the rotating short plate 14 fixedly sleeved at its end will make a circular motion. The other end of the rotating short plate 14 is connected to the rotating shaft 16 at the bottom of the screening box 3 through the push-pull rod 15. The circular motion is converted into a reciprocating thrust in the front and back direction through the push-pull rod 15 to drive the screening box 3 to move. The two sides of the screening box 3 are connected to the rotating shaft 41 of the bearing cross plate 4 through the swing rod 42. Under the action of the reciprocating thrust of the push-pull rod 15, the screening box 3 will swing back and forth with the rotating shaft 41 as the fulcrum. The screening screen 31 inside the screening box 3 swings synchronously with the box body to screen the seeds that fall evenly. Seeds with full grains and qualified size cannot pass through the screening screen 31 and will be discharged from the discharge port 32 on the left side with the swinging motion. Impurities or inferior seeds with dry grains and small size fall into the bottom of the screening box 3 through the screening screen 31 and are finally discharged from the discharge port 33 on the right side.

[0028] Example 2

[0029] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a transmission toothed belt 121 is also meshed and sleeved on the outer surface of the main gear 12, and a driven gear 122 is meshed and sleeved on the other end of the transmission toothed belt 121. A rotating rod 123 is fixedly connected to the output end of the driven gear 122, and the other end of the rotating rod 123 extends into the front end of the guide port 21. A guide roller 124 is fixedly sleeved on the outer surface of the rotating rod 123 inside the guide port 21. Diverting grooves 125 are opened on the outer surface of the guide roller 124.

[0030] Furthermore, when the gear 122 rotates, the rotating rod 123 fixedly connected to its output end rotates synchronously. The rotating rod 123 extends into the inside of the feed inlet 21 and a feed roller 124 is fixedly sleeved on its outer surface. The rotating rod 123 drives the feed roller 124 to rotate inside the feed inlet 21. The operator pours watermelon seeds into the feed hopper 2. The seeds slide down the feed hopper 2 to the feed inlet 21. At this time, the diversion groove 125 on the feed roller 124 rotates with the roller body, which will separate the concentrated inflow of seeds into multiple streams and transport them to the screening box 3 below in a gradual and even manner, so as to avoid the seeds from accumulating locally in the screening box 3.

[0031] The solution uses a PLC as the core control component. The PLC establishes a connection with the servo motor 11 through RS-485 communication. When the servo motor 11 needs to be started, the PLC sends a start command to the servo motor 11, causing the servo motor 11 to start.

[0032] The working principle of this seed screening device for watermelon cultivation will be explained in detail below.

[0033] like Figure 1-5As shown, during operation, the operator first sends a start signal to the PLC-controlled core component via a control switch. The PLC then issues a running command to the servo motor 11. After starting, the servo motor 11 drives the main gear 12 at the output end to rotate synchronously. The main gear 12 transmits power through two paths: on one hand, the main gear 12 directly drives the coaxial drive rod 13 to rotate, providing power for the swaying motion of the screening box 3; on the other hand, the main gear 12 drives the driven gear 122 to rotate through the transmission belt 121 meshing with its outer surface. To provide power for uniform feeding at the feed inlet 21, during the uniform feeding stage, the rotating rod 123, which is fixedly connected to the output end of the gear 122, rotates synchronously. The rotating rod 123 extends into the feed inlet 21, and a guide roller 124 is fixedly sleeved on its outer surface. The rotating rod 123 drives the guide roller 124 to rotate inside the feed inlet 21. When the operator pours watermelon seeds into the feed hopper 2, the seeds slide down the feed hopper 2 to the feed inlet 21. At this time, the diversion groove 125 on the guide roller 124 rotates with the roller body, which will divert the concentrated seeds. The seeds are divided into multiple streams and fed evenly into the screening box 3 below, preventing local accumulation of seeds within the screening box 3. During the oscillating screening stage, when the drive rod 13 rotates with the main gear 12, the rotating short plate 14 fixedly sleeved at its end will perform circular motion. The other end of the rotating short plate 14 is connected to the rotating shaft 16 at the bottom of the screening box 3 through the push-pull rod 15. The circular motion is converted into a reciprocating thrust in the front-back direction through the push-pull rod 15, which drives the screening box 3 to move. The two sides of the screening box 3 are connected to the rotating shaft 41 of the bearing horizontal plate 4 through the oscillating rod 42. Next, under the reciprocating thrust of the push-pull rod 15, the screening box 3 will swing back and forth around the pivot 41. The screening screen 31 inside the screening box 3 swings synchronously with the box body, screening the evenly falling seeds. Seeds with full grains and qualified size cannot pass through the screening screen 31 and will be discharged from the discharge port 32 on the left side with the swinging motion. Impurities or inferior seeds with shriveled grains and small size will fall into the bottom of the screening box 3 through the screening screen 31 and finally be discharged from the discharge port 33 on the right side, completing the seed grading and screening.

[0034] 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. A seed screening device for watermelon cultivation, comprising a support frame (1), characterized in that: A feeding hopper (2) is fixedly installed on the top left side of the support bracket (1), a guide port (21) is fixedly installed at the bottom of the feeding hopper (2), a screening box (3) is set below the guide port (21), and a bearing cross plate (4) is fixedly installed at the top of both the front and rear sides of the support bracket (1). A rotating shaft (41) is fixedly installed on both sides of the bottom end of the bearing plate (4). A rocking rod (42) is rotatably connected to the inner axis of the rotating shaft (41). The other end of the rocking rod (42) is rotatably connected to the two side shells of the screening box (3).

2. The seed screening device for watermelon cultivation according to claim 1, characterized in that: A screening screen (31) is fixedly installed in the middle of the inner wall of the screening box (3). A discharge port (32) is fixedly installed on the left side of the other end of the screening screen (31). A discharge port (33) is fixedly installed at the bottom of the screening box (3) below the right side of the screening screen (31).

3. The seed screening device for watermelon cultivation according to claim 1, characterized in that: A servo motor (11) is fixedly installed on the left side of the front of the support bracket (1). A main gear (12) is fixedly connected to the output end of the servo motor (11). A drive rod (13) is fixedly installed on the output end of the main gear (12). A rotating short plate (14) is fixedly sleeved on the other end of the drive rod (13).

4. The seed screening device for watermelon cultivation according to claim 3, characterized in that: A push-pull rod (15) is rotatably sleeved on the other end of the rotating short plate (14), and a rotating shaft (16) is rotatably connected to the other end of the push-pull rod (15). The rotating shaft (16) is fixedly installed on the bottom shell of the screening box (3).

5. The seed screening device for watermelon cultivation according to claim 3, characterized in that: A transmission toothed belt (121) is also meshed on the outer surface of the main gear (12), and a driven gear (122) is meshed on the other end of the transmission toothed belt (121).

6. The seed screening device for watermelon cultivation according to claim 5, characterized in that: A rotating rod (123) is fixedly connected to the output end of the gear (122), and the other end of the rotating rod (123) extends into the front end of the feed inlet (21).

7. The seed screening device for watermelon cultivation according to claim 6, characterized in that: Inside the feed inlet (21), a feed roller (124) is fixedly sleeved on the outer surface of the rotating rod (123), and a flow divider groove (125) is opened on all four outer surfaces of the feed roller (124).

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