Double-roller flexible corn thresher

Abstract

The utility model belongs to the technical field of corn threshing, and discloses a double-roller flexible corn thresher which comprises a rack, two threshing rollers which are arranged in parallel are horizontally and rotatably arranged on the rack, the threshing rollers are divided into a primary threshing roller and a secondary threshing roller, a plurality of rows of rigid threshing teeth and first flexible threshing teeth which are spirally arranged are alternately arranged on the primary threshing roller, and a plurality of rows of second flexible threshing teeth are alternately arranged on the secondary threshing roller. A plurality of rows of second flexible threshing teeth are spirally arranged on the primary threshing roller, a plurality of rows of second flexible threshing teeth are spirally arranged on the secondary threshing roller, the spiral directions of the threshing teeth on the primary threshing roller and the threshing teeth on the secondary threshing roller are the same, the spiral directions of the threshing teeth on the two threshing rollers are opposite, a grain bin and a driving assembly are arranged in the rack, and a feeding hopper is arranged on the rack and located above the feeding ends of the threshing rollers. According to the corn threshing device, the two threshing rollers are arranged side by side, the rigid threshing teeth and the flexible threshing teeth which are spirally arranged are arranged respectively, and the rigid threshing teeth and the flexible threshing teeth are used in cooperation, so that damage to corn grains is effectively reduced on the premise that thorough threshing is guaranteed, and the integrity of the corn grains is improved.

Description

Technical Field

[0001] This utility model relates to the field of corn threshing technology, and in particular to a double-roller flexible corn thresher. Background Technology

[0002] Corn is one of the world's most important food crops, and threshing is a crucial step in the corn harvesting process. Its efficiency and quality directly affect corn storage and processing.

[0003] Traditional corn threshing mainly involves farmers manually rubbing the kernels or using simple wooden threshers. This method is labor-intensive, inefficient, and prone to kernel damage, making it unsuitable for large-scale production. With continuous technological advancements, corn threshers have gradually replaced manual threshing. Most existing corn threshers use a single-roller design, relying on rigid threshing components (such as metal spikes) to collide with the corn cob at high speed. Due to the uneven distribution of mechanical friction and centrifugal force, this can easily cause physical damage such as micro-cracks in the kernel skin and bruising of the germ, affecting kernel quality. Furthermore, the single-roller design makes it difficult to completely remove the corn cob, resulting in incomplete threshing and impacting efficiency. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a double-roller flexible corn thresher.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a double-roller flexible corn thresher, comprising a frame, on which two threshing rollers are horizontally rotatably arranged in parallel. The threshing rollers are divided into a primary threshing roller and a secondary threshing roller from the feed end to the discharge end. The primary threshing roller is alternately provided with several rows of rigid threshing teeth and first flexible threshing teeth arranged in a spiral pattern. The secondary threshing roller is provided with several rows of second flexible threshing teeth arranged in a spiral pattern. The spiral direction of the threshing teeth on the primary threshing roller and the secondary threshing roller is the same, while the spiral direction of the threshing teeth on the two threshing rollers is opposite. A grain bin is provided below the threshing rollers inside the frame, and a discharge port is provided on one side of the grain bin. An obliquely arranged screen is provided between the bottom of the threshing rollers and the grain bin inside the frame. A feed hopper is provided above the feed end of the threshing rollers on the frame. A drive assembly for driving the two threshing rollers to rotate is provided inside the frame.

[0006] Furthermore, the top of the frame is provided with a top cover plate covering the threshing roller, and the top cover plate has a feed inlet at the feed end of the threshing roller, and the feed hopper is provided at the feed inlet.

[0007] Furthermore, the frame is provided with two first bearing seats at the discharge end of the threshing roller, and a first rolling bearing is provided in the first bearing seat. The top cover plate is provided with two second rolling bearings on the side wall of the feed end of the threshing roller. Rotating shafts are protruding from both ends of the two threshing rollers and are respectively connected to the corresponding rolling bearings.

[0008] Furthermore, the rotating shaft at the feed end of the threshing roller passes through the top cover plate and is equipped with a spur gear. The spur gears on the two threshing rollers mesh with each other. A large pulley is also provided on the rotating shaft at the feed end of one of the threshing rollers. The drive assembly includes a drive motor installed in the frame. A small pulley is provided on the output shaft of the drive motor. The small pulley and the large pulley are connected by a synchronous belt.

[0009] Furthermore, the horizontal gap between the two threshing rollers is greater than the diameter of the corn cob but smaller than the diameter of the corn cob.

[0010] Furthermore, the screen is an arc plate arranged along the length of the threshing roller, with its highest point located below the feed end of the threshing roller and its lowest point extending outside the frame.

[0011] In summary, this utility model has the following beneficial effects: In this application, by arranging two threshing rollers side by side and respectively equipping them with a rigid threshing tooth, a first flexible threshing tooth, and a second flexible threshing tooth arranged in a spiral pattern, the corn cob can be driven to move forward between the two threshing rollers through the counter-rotation of the two threshing rollers and the spiral arrangement of the threshing teeth. Under the alternating action of the rigid threshing tooth and the first flexible threshing tooth of the primary threshing roller, most of the grains on the corn cob can be removed. Then, under the action of the second flexible threshing tooth of the secondary threshing roller, the remaining grains are threshed. Through the combined use of the rigid threshing tooth and the flexible threshing tooth, the damage to the corn grains is effectively reduced while ensuring thorough threshing, thus improving the integrity of the corn grains. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model;

[0014] Figure 3 This is a structural schematic diagram of an embodiment of the present invention to highlight the top cover plate and the threshing roller;

[0015] Figure 4 This is a schematic diagram of the structure of the threshing roller in an embodiment of this utility model.

[0016] In the diagram: 10. Frame; 11. Grain bin; 12. Discharge port; 13. Screen; 14. Feed hopper; 15. Top cover plate; 16. First bearing seat; 17. First rolling bearing; 18. Second rolling bearing; 20. Threshing roller; 21. Primary threshing roller; 22. Secondary threshing roller; 23. Rigid threshing teeth; 24. First flexible threshing teeth; 25. Second flexible threshing teeth; 26. Rotating shaft; 27. Spur gear; 28. Large pulley; 30. Drive assembly; 31. Drive motor; 32. Small pulley; 33. Synchronous belt. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] like Figure 1-4 As shown in the illustration, this application discloses a double-roller flexible corn thresher, including a frame 10, threshing rollers 20, a grain bin 11, a feed hopper 14, and a drive assembly 30. The grain bin 11 is located within the frame 10 and below the threshing rollers 20, serving to receive corn kernels threshed by the rollers 20. A discharge port 12 is provided on one side of the grain bin 11, allowing the threshed corn kernels to fall into the bin and flow through the discharge port 12 to a collection device below. The feed hopper 14 is located on the frame 10 above the feed end of the threshing rollers 20, for feeding corn cobs. Two threshing rollers 20 are arranged side-by-side and horizontally rotatable on the frame 10. The drive assembly 30 drives the two threshing rollers 20 to rotate, threshing the corn cobs.

[0019] In the specific configuration, a top cover plate 15 is provided on the top of the frame 10, covering the threshing roller 20. The top cover plate 15 is used to protect the corn kernels during threshing and prevent them from splashing out. A feed inlet is provided on the top cover plate 15 at the feed end of the threshing roller 20, and a feed hopper 14 is provided at the feed inlet. Two first bearing seats 16 are provided on the frame 10 at the discharge end of the threshing roller 20, and a first rolling bearing 17 is provided in the first bearing seat 16. Two second rolling bearings 18 are provided on the side wall of the top cover plate 15 on the side of the feed end of the threshing roller 20. Rotating shafts 26 protrude from both ends of the two threshing rollers 20, and the rotating shafts 26 at both ends are respectively connected to the corresponding first rolling bearings 17 and second rolling bearings 18. The first rolling bearings 17 and second rolling bearings 18 provide rolling support for the threshing rollers 20, allowing the threshing rollers 20 to rotate on the frame 10.

[0020] The rotating shaft 26 at the feed end of the threshing roller 20 passes through the top cover plate 15 and is equipped with a spur gear 27. The spur gears 27 on the two threshing rollers 20 mesh with each other, allowing the two threshing rollers 20 to rotate synchronously in opposite directions. Specifically, the rotation direction of the two spur gears 27 is such that the upper part of the spur gear 27 rotates from the outside towards the meshing point, thus squeezing and impacting the corn cobs to achieve threshing. A large pulley 28 is also provided on the rotating shaft 26 at the feed end of one of the threshing rollers 20. The drive assembly 30 includes a drive motor 31 installed in the frame 10. A small pulley 32 is provided on the output shaft of the drive motor 31. The small pulley 32 is connected to the large pulley 28 via a synchronous belt 33. The drive motor 31 drives the small pulley 32 to rotate, which in turn drives the large pulley 28 to rotate via the synchronous belt 33, thereby driving the rotating shaft 26 to rotate and driving the two threshing rollers 20 to rotate.

[0021] The threshing rollers 20 are divided into a primary threshing roller 21 and a secondary threshing roller 22 from the feed end to the discharge end. The primary threshing roller 21 has several rows of rigid threshing teeth 23 and first flexible threshing teeth 24 arranged in a spiral pattern, alternating between the two. The secondary threshing roller 22 has several rows of second flexible threshing teeth 25 arranged in a spiral pattern. The rigid threshing teeth 23 are made of nitrided 45# steel, while the first and second flexible threshing teeth 24 and 25 are nitrile rubber injection-fitted teeth. The spiral direction of the threshing teeth on the primary and secondary threshing rollers 21 and 22 is the same, while the spiral direction of the threshing teeth on the two rollers 20 is opposite. This allows the corn cobs to move forward together when the two rollers 20 rotate synchronously, improving the threshing effect. The horizontal gap between the two threshing rollers 20 should be greater than the diameter of the corn cob but less than the diameter of the corn cob. In the specific design, the horizontal gap between the two threshing rollers 20 should be slightly larger than the maximum diameter of the corn cob to ensure that the corn cob can fall out of the gap after threshing.

[0022] An obliquely arranged screen 13 is installed inside the frame 10, between the bottom of the threshing roller 20 and the grain hopper 11. The screen 13 is an arc-shaped plate arranged along the length of the threshing roller 20, with its highest point located below the feed end of the threshing roller 20 and its lowest point extending outside the frame 10. The screen 13 has several holes larger than the diameter of corn kernels, allowing the threshed corn kernels to fall through the holes into the grain hopper 11, while the corn cobs slide down the screen 13 to the outside of the frame 10, achieving separate collection of corn kernels and corn cobs. The screen 13 is made of stainless steel, which has good wear resistance and corrosion resistance.

[0023] The operating principle of the double-roller flexible corn thresher in this embodiment is as follows: the corn cob reaches the feeding end of the two threshing rollers 20 from the feeding hopper 14. The two threshing rollers 20 rotate synchronously in opposite directions under the drive of the drive motor 31, driving the threshing teeth on them to rotate spirally, thereby moving the corn cob towards the discharge end. When passing through the primary threshing roller 21, the rigid threshing teeth 23 and the first flexible threshing teeth 24 alternately strike the corn cob, which can remove most of the grains on the corn cob. When the corn cob reaches the secondary threshing roller 22, the remaining grains are threshed under the action of the second flexible threshing teeth 25. The threshed corn grains fall onto the screen 13, pass through the screen holes and fall into the grain bin 11. The corn cobs that have been thoroughly threshed fall onto the screen 13 and slide down the screen 13 to the outside of the frame 10, thus realizing corn threshing and separation. During threshing, the rigid threshing teeth 23 first create some notches on the corn cob by striking the corn cob, and then the flexible threshing teeth peel the corn kernels off from the notches. This ensures thorough threshing, reduces damage to the corn kernels, and improves the integrity of the corn kernels.

[0024] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without threshing the grains according to the principles of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A double-roller flexible corn thresher, comprising a frame (10), characterized in that: Two threshing rollers (20) are horizontally rotatably mounted on the frame (10). The threshing rollers (20) are divided into a primary threshing roller (21) and a secondary threshing roller (22) from the feed end to the discharge end. The primary threshing roller (21) has several rows of rigid threshing teeth (23) and first flexible threshing teeth (24) arranged in a spiral pattern, alternating between the two. The secondary threshing roller (22) has several rows of second flexible threshing teeth (25) arranged in a spiral pattern. The spiral direction of the threshing teeth on the primary threshing roller (21) and the secondary threshing roller (22) is the same. The threshing teeth on the threshing roller (20) have opposite spiral directions. A grain bin (11) is provided in the frame (10) below the threshing roller (20). A discharge port (12) is provided on one side of the grain bin (11). An obliquely arranged screen (13) is provided in the frame (10) between the bottom of the threshing roller (20) and the grain bin (11). A feed hopper (14) is provided on the frame (10) above the feed end of the threshing roller (20). A drive assembly (30) for driving the two threshing rollers (20) to rotate is provided in the frame (10).

2. The double-roller flexible corn thresher according to claim 1, characterized in that: The top of the frame (10) is provided with a top cover plate (15) covering the threshing roller (20). The top cover plate (15) has a feed inlet at the feed end of the threshing roller (20), and the feed hopper (14) is provided at the feed inlet.

3. The double-roller flexible corn thresher according to claim 2, characterized in that: The frame (10) is provided with two first bearing seats (16) at the discharge end of the threshing roller (20). The first bearing seats (16) are provided with first rolling bearings (17). The top cover plate (15) is provided with two second rolling bearings (18) on the side wall of the feed end of the threshing roller (20). The two ends of the two threshing rollers (20) are provided with rotating shafts (26) and are respectively connected to the corresponding rolling bearings.

4. A double-roller flexible corn thresher according to claim 3, characterized in that: The rotating shaft (26) at the feed end of the threshing roller (20) passes through the top cover plate (15) and is equipped with a spur gear (27). The spur gears (27) on the two threshing rollers (20) mesh with each other. A large pulley (28) is also provided on the rotating shaft (26) at the feed end of one of the threshing rollers (20). The drive assembly (30) includes a drive motor (31) installed in the frame (10). A small pulley (32) is provided on the output shaft of the drive motor (31). The small pulley (32) and the large pulley (28) are connected by a synchronous belt (33).

5. A double-roller flexible corn thresher according to claim 1, characterized in that: The horizontal gap between the two threshing rollers (20) is greater than the diameter of the corn cob but less than the diameter of the corn cob.

6. A double-roller flexible corn thresher according to claim 1, characterized in that: The screen (13) is an arc plate arranged along the length of the threshing roller (20), with its highest point located below the feed end of the threshing roller (20) and its lowest point extending outside the frame (10).

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