Multi-gear seed screening device for wheat planting

Abstract

The utility model relates to the technical field of seed screening devices, in particular to a multi-gear seed screening device for wheat planting, which comprises a support frame, a connecting sleeve fixedly connected onto the support frame, a connecting frame fixedly connected onto the connecting sleeve, three first connecting shafts rotationally connected onto the connecting frame, and gears fixedly connected onto the first connecting shafts. The connecting sleeve is rotatably connected with a gear ring, the three gears are meshed with the gear ring, the gear ring is fixedly connected with a main shaft, the main shaft is fixedly connected with a plurality of fanning plates, the connecting sleeve is rotatably connected with four second connecting shafts, the second connecting shafts are fixedly connected with synchronous wheels, and the same synchronous belt is wound on the four synchronous wheels; wherein three second connecting shafts are slidably connected with connecting blocks, and the supporting frame is provided with a driving structure. And the rotating speed gear of the fanning plate can be adjusted according to actual conditions, so that separation between seeds and impurities is more convenient, and the use flexibility is effectively improved.

Description

Technical Field

[0001] This utility model relates to a seed screening device, specifically a multi-level seed screening device for wheat cultivation, and belongs to the technical field of seed screening devices. Background Technology

[0002] After harvesting, wheat seeds contain impurities such as husks and straw. To obtain pure, high-quality wheat seeds, these impurities need to be removed. Since these impurities are relatively light compared to wheat seeds, they can be screened using a wind-powered screening machine. Under the action of the wind-powered screening machine, the lighter impurities are blown to a farther place, while the heavier materials settle because the airflow cannot support their weight, thus achieving screening. A typical wind-powered screening machine uses the rotation of internal fan plates to blow out the air.

[0003] However, the fan blades on traditional wind-powered sorting machines are driven to rotate by the motor on the sorting machine, so the rotation speed does not change. Therefore, it cannot be adjusted when the wind force is strong or weak (strong winds can easily blow the seeds out, while weak winds cannot completely remove impurities), resulting in poor flexibility of use. Utility Model Content

[0004] The purpose of this invention is to provide a multi-speed seed screening device for wheat cultivation to solve the above problems. The device can adjust the speed of the fan blades according to the actual situation, thereby facilitating the separation of seeds and impurities and effectively improving the flexibility of use.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a multi-level seed screening device for wheat cultivation, comprising a support frame, a connecting sleeve fixedly connected to the support frame, a shifting structure provided on the connecting sleeve, the shifting structure comprising a connecting frame and a first connecting shaft, a connecting frame fixedly connected to the connecting sleeve, three first connecting shafts rotatably connected to the connecting frame, gears fixedly connected to the first connecting shafts, a gear ring rotatably connected to the connecting sleeve, the three gears meshing with the gear ring, a main shaft fixedly connected to the gear ring, multiple fan blades fixedly connected to the main shaft, four second connecting shafts rotatably connected to the connecting sleeve, synchronous pulleys fixedly connected to the second connecting shafts, the same synchronous belt wound around the four synchronous pulleys, connecting blocks slidably connected to three of the second connecting shafts, springs sleeved on the outside of the connecting blocks, a rotating shaft rotatably connected to the connecting blocks, two support blocks fixedly connected to the rotating shaft, the support blocks engaging with the second connecting shafts, a drive structure provided on the support frame, and multiple marking blocks fixedly connected to the connecting sleeve.

[0006] Preferably, one end of the spring abuts against the second connecting shaft, and the other end of the spring abuts against the connecting block.

[0007] Preferably, one end of the connecting block has a quadrangular prism structure, the other end of the connecting block has a cylindrical structure, and the cross-section of one end of the connecting block has a trapezoidal structure.

[0008] Preferably, the diameters of the three gears are all different, while the diameters of the four synchronizing pulleys are equal.

[0009] Preferably, two first connecting seats are fixedly connected to the support frame, and a main shaft is rotatably connected between the two first connecting seats.

[0010] Preferably, an air guide shroud is fixedly connected to the support frame, and the plurality of fan blades are arranged in a circular array about the center of the main shaft.

[0011] Preferably, a hopper is fixedly connected to the support frame, a connecting frame is installed on the support frame, and a screen is installed on the connecting frame.

[0012] Preferably, the support frame is provided with a shaking structure, the shaking structure including a long shaft and a second connecting seat, the second connecting seat is fixedly connected to the support frame, the long shaft is rotatably connected to the second connecting seat, a turntable is fixedly connected to the long shaft, a connecting rod is rotatably connected to the turntable, and the connecting rod is rotatably connected to the connecting frame.

[0013] Preferably, the drive structure includes a motor, a first pulley is fixedly connected to the output shaft of the motor, a second pulley is fixedly connected to one of the second connecting shafts, and a first belt is wound between the first pulley and the second pulley.

[0014] Preferably, a third pulley is fixedly connected to the long shaft, and a second belt is wound between the third pulley and the first pulley.

[0015] The beneficial effects of this utility model are as follows: The drive structure enables one of the second connecting shafts to rotate at a constant speed. When the fan blade needs to rotate at a certain speed, pulling the shaft disengages the support block from the second connecting shaft. Then, rotating the shaft causes the support block to lose its support, releasing the shaft. At this point, the spring extends, causing the connecting block to move towards the first connecting shaft and engage with it. The drive structure then drives one of the second connecting shafts to rotate. This rotation drives one of the synchronous pulleys, which in turn drives the other three synchronous pulleys via a synchronous belt. The rotation of these pulleys, in turn, drives the second connecting shaft. At this point, because the connecting block on one of the second connecting shafts is engaged with one of the first connecting shafts… The shafts engage, so the rotation of the second connecting shaft drives one of the first connecting shafts to rotate via the connecting blocks. The rotation of one of the first connecting shafts drives one of the gears to rotate, which in turn drives the gear ring to rotate. The gear ring then drives the main shaft to rotate, which in turn drives multiple fan blades to rotate. Since the three gears have different diameters, when it is necessary to change the speed of the fan blades, simply engage different connecting blocks with different first connecting shafts. This allows for the adjustment of different speed settings of the fan blades, making it easier to separate seeds and impurities and effectively improving the flexibility of use. It is worth noting that, to avoid jamming, when one connecting block engages with one of the first connecting shafts, the other two connecting blocks should not engage with the other two first connecting shafts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the turntable and the connecting rod of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the main shaft and the fan blade of this utility model;

[0019] Figure 4 for Figure 3 The enlarged schematic diagram of part A shown below;

[0020] Figure 5 This is a schematic diagram of the connection structure between the synchronous pulley and the synchronous belt of this utility model.

[0021] In the diagram: 1. Support frame; 2. Connecting sleeve; 3. Gear shifting structure; 301. Connecting frame; 302. First connecting shaft; 303. Gear; 304. Gear ring; 305. Second connecting shaft; 306. Synchronous pulley; 307. Synchronous belt; 308. Connecting block; 309. Spring; 310. Rotating shaft; 311. Support block; 312. Marking block; 4. Main shaft; 5. Fan plate; 6. First connecting seat; 7. Air guide cover; 8. Drive structure; 801. Motor; 802. First pulley; 803. First belt; 804. Second pulley; 805. Second belt; 806. Third pulley; 9. Vibration structure; 901. Long shaft; 902. Second connecting seat; 903. Turntable; 904. Connecting rod; 10. Hopper; 11. Connecting frame; 12. Screen. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a multi-stage seed screening device for wheat cultivation includes a support frame 1. A connecting sleeve 2 is fixedly connected to the support frame 1. The connecting sleeve 2 is provided with a shifting structure 3. The shifting structure 3 includes a connecting frame 301 and a first connecting shaft 302. The connecting frame 301 is fixedly connected to the connecting sleeve 2. Three first connecting shafts 302 are rotatably connected to the connecting frame 301. Gears 303 are fixedly connected to the first connecting shafts 302. A gear ring 304 is rotatably connected to the connecting sleeve 2. The three gears 303 mesh with the gear ring 304. A main shaft 4 is fixedly connected to the gear ring 304. Multiple fans are fixedly connected to the main shaft 4. Plate 5, four second connecting shafts 305 are rotatably connected to the connecting sleeve 2, synchronous pulleys 306 are fixedly connected to the second connecting shafts 305, the same synchronous belt 307 is wound around the four synchronous pulleys 306, connecting blocks 308 are slidably connected to three of the second connecting shafts 305, springs 309 are sleeved on the outside of the connecting blocks 308, rotating shafts 310 are rotatably connected to the connecting blocks 308, two support blocks 311 are fixedly connected to the rotating shafts 310, the support blocks 311 are engaged with the second connecting shafts 305, the support frame 1 is provided with a drive structure 8, and multiple marking blocks 312 are fixedly connected to the connecting sleeve 2.

[0024] As a technical optimization solution of this utility model, such as Figure 4 As shown, one end of the spring 309 abuts against the second connecting shaft 305, and the other end of the spring 309 abuts against the connecting block 308. Therefore, under the action of the spring 309, the connecting block 308 can automatically engage with the first connecting shaft 302.

[0025] As a technical optimization solution of this utility model, such as Figure 4 As shown, one end of the connecting block 308 has a quadrangular prism structure, the other end of the connecting block 308 has a cylindrical structure, and the cross-section of one end of the connecting block 308 has a trapezoidal structure, so it can play a guiding role when the connecting block 308 and the first connecting shaft 302 are engaged.

[0026] As a technical optimization solution of this utility model, such as Figure 5 As shown, the diameters of the three gears 303 are not equal, while the diameters of the four synchronous pulleys 306 are equal. Therefore, the gear position is adjusted by driving the gear ring 304 to rotate through the gears 303 of different diameters.

[0027] As a technical optimization solution of this utility model, such as Figure 3 As shown, two first connecting seats 6 are fixedly connected to the support frame 1, and a main shaft 4 is rotatably connected between the two first connecting seats 6, so the main shaft 4 can be supported by the two first connecting seats 6.

[0028] As a technical optimization solution of this utility model, such as Figure 1 and Figure 3 As shown, a wind guide shroud 7 is fixedly connected to the support frame 1, and multiple fan blades 5 are arranged in a circular array about the center of the main shaft 4, so the wind guide shroud 7 can guide the airflow.

[0029] As a technical optimization solution of this utility model, such as Figure 1 and Figure 2 As shown, a hopper 10 is fixedly connected to the support frame 1, a connecting frame 11 is installed on the support frame 1, and a screen 12 is installed on the connecting frame 11, so that wheat seeds can be further screened through the screen 12.

[0030] As a technical optimization solution of this utility model, such as Figure 1 and Figure 2As shown, the support frame 1 is provided with a shaking structure 9, which includes a long shaft 901 and a second connecting seat 902. The second connecting seat 902 is fixedly connected to the support frame 1, and the long shaft 901 is rotatably connected to the second connecting seat 902. A turntable 903 is fixedly connected to the long shaft 901, and a connecting rod 904 is rotatably connected to the turntable 903. The connecting rod 904 is rotatably connected to the connecting frame 11, thus enabling the screen 12 to shake, thereby improving the screening effect.

[0031] As a technical optimization solution of this utility model, such as Figure 1 and Figure 2 As shown, the drive structure 8 includes a motor 801, a first pulley 802 fixedly connected to the output shaft of the motor 801, a second pulley 804 fixedly connected to one of the second connecting shafts 305, a first belt 803 wound between the first pulley 802 and the second pulley 804, and a third pulley 806 fixedly connected to the long shaft 901, a second belt 805 wound between the third pulley 806 and the first pulley 802, thus enabling one of the second connecting shafts 305 to rotate at a constant speed.

[0032] In use, this invention allows wheat seeds to be screened to be added to the hopper 10, from which they fall. As the seeds fall, air is blown out from one end of the air guide 7 by the rotation of multiple fan blades 5. Lighter impurities are blown away, while heavier seeds fall onto the screen 12 for further screening. When the fan blades 5 need to be rotated at a certain speed, the rotating shaft 310 can be pulled to disengage the support block 311 from the second connecting shaft 305. Then, the rotating shaft 310 can be rotated to remove the support block 311 from its support, and the rotating shaft 310 can be released. At this point, the spring 3... 09 will extend, causing the connecting block 308 to move towards the first connecting shaft 302 and engage with it. Then, by starting the motor 801, the output shaft of the motor 801 will rotate, driving the first pulley 802 to rotate. The first pulley 802, through the first belt 803, drives the second pulley 804 to rotate. The second pulley 804 drives one of the second connecting shafts 305 to rotate. The rotation of one of the second connecting shafts 305 will drive one of the synchronous pulleys 306 to rotate. The rotation of one of the synchronous pulleys 306 will drive the other three synchronous pulleys 306 to rotate through the synchronous belt 307. The rotation of the synchronous pulleys 306 will drive the second connecting shaft 305 to rotate. At this time, due to the first... The connecting block 308 on the second connecting shaft 305 engages with one of the first connecting shafts 302. Therefore, rotation of the second connecting shaft 305 drives one of the first connecting shafts 302 to rotate via the connecting block 308. Rotation of the first connecting shaft 302 drives one of the gears 303 to rotate, which in turn drives a gear ring 304 to rotate. Rotation of the gear ring 304 drives the main shaft 4 to rotate, which in turn drives multiple fan blades 5 to rotate. Since the three gears 303 have different diameters, changing the rotation speed of the fan blades 5 simply requires engaging different connecting blocks 308 with different first connecting shafts 302, thus achieving different rotation speeds for the fan blades 5. Adjusting the speed gears makes it easier to separate seeds and impurities, effectively improving the flexibility of use. It is worth noting that, in order to avoid jamming, when one connecting block 308 is engaged with one of the first connecting shafts 302, the other two connecting blocks 308 should not be engaged with the other two first connecting shafts 302. When the first pulley 802 rotates, it will also drive the third pulley 806 to rotate through the second belt 805. The rotation of the third pulley 806 will drive the long shaft 901 to rotate. The rotation of the long shaft 901 will drive the turntable 903 to rotate. The rotation of the turntable 903 will cause the connecting frame 11 to vibrate through the connecting rod 904, thereby improving the screening effect of the screen 12.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-stage seed screening device for wheat cultivation, comprising a support frame (1), characterized in that: A connecting sleeve (2) is fixedly connected to the support frame (1). A shifting structure (3) is provided on the connecting sleeve (2). The shifting structure (3) includes a connecting frame (301) and a first connecting shaft (302). The connecting frame (301) is fixedly connected to the connecting sleeve (2). Three first connecting shafts (302) are rotatably connected to the connecting frame (301). Gears (303) are fixedly connected to the first connecting shafts (302). A gear ring (304) is rotatably connected to the connecting sleeve (2). The three gears (303) mesh with the gear ring (304). A main shaft (4) is fixedly connected to the gear ring (304). Multiple fan blades (5) are fixedly connected to the main shaft (4). Four second connecting shafts (305) are rotatably connected. Synchronous pulleys (306) are fixedly connected to the second connecting shafts (305). The same synchronous belt (307) is wound around the four synchronous pulleys (306). Connecting blocks (308) are slidably connected to three of the second connecting shafts (305). Springs (309) are sleeved on the outside of the connecting blocks (308). Rotating shafts (310) are rotatably connected to the connecting blocks (308). Two support blocks (311) are fixedly connected to the rotating shafts (310). The support blocks (311) are engaged with the second connecting shafts (305). A drive structure (8) is provided on the support frame (1). Multiple marking blocks (312) are fixedly connected to the connecting sleeve (2).

2. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: One end of the spring (309) abuts against the second connecting shaft (305), and the other end of the spring (309) abuts against the connecting block (308).

3. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: One end of the connecting block (308) has a quadrangular prism structure, the other end of the connecting block (308) has a cylindrical structure, and the cross section of one end of the connecting block (308) has a trapezoidal structure.

4. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: The diameters of the three gears (303) are not equal, while the diameters of the four synchronous pulleys (306) are equal.

5. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: Two first connecting seats (6) are fixedly connected to the support frame (1), and a main shaft (4) is rotatably connected between the two first connecting seats (6).

6. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: A wind guide hood (7) is fixedly connected to the support frame (1), and multiple fan blades (5) are arranged in a circular array about the center of the main shaft (4).

7. The multi-stage seed screening device for wheat cultivation according to claim 1, characterized in that: A hopper (10) is fixedly connected to the support frame (1), a connecting frame (11) is installed on the support frame (1), and a screen (12) is installed on the connecting frame (11).

8. The multi-stage seed screening device for wheat cultivation according to claim 7, characterized in that: The support frame (1) is provided with a shaking structure (9), which includes a long shaft (901) and a second connecting seat (902). The second connecting seat (902) is fixedly connected to the support frame (1), and the long shaft (901) is rotatably connected to the second connecting seat (902). A turntable (903) is fixedly connected to the long shaft (901), and a connecting rod (904) is rotatably connected to the turntable (903). The connecting rod (904) is rotatably connected to the connecting frame (11).

9. The multi-stage seed screening device for wheat cultivation according to claim 8, characterized in that: The drive structure (8) includes a motor (801), a first pulley (802) is fixedly connected to the output shaft of the motor (801), a second pulley (804) is fixedly connected to one of the second connecting shafts (305), and a first belt (803) is wound between the first pulley (802) and the second pulley (804).

10. A multi-stage seed screening device for wheat cultivation according to claim 9, characterized in that: A third pulley (806) is fixedly connected to the long shaft (901), and a second belt (805) is wound between the third pulley (806) and the first pulley (802).

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