Corn thresher

Abstract

The invention relates to a corn thresher. The device comprises a machine frame, threshing mechanisms and a driving mechanism, the machine frame is provided with a plurality of sets of threshing mechanisms, each threshing mechanism comprises a charging barrel, a threshing hopper and a centering assembly, the charging barrels are fixedly installed on the machine frame in the vertical direction, the threshing hoppers are installed at the bottoms of the charging barrels, and the centering assemblies are fixedly installed on the machine frame. A centering assembly used for adjusting the axis position of a corn cob is further installed on the charging barrel, and the corn cob and the threshing hopper can be kept concentric through the centering assembly. Driving mechanisms in one-to-one correspondence with the threshing mechanisms are installed on the machine frame, corn cobs can be punctured and fixed through the driving mechanisms, the corn cobs are driven to rotate and ascend and descend, and therefore the corn cobs are threshed in cooperation with the threshing hopper. According to the scheme, mechanical centering can be conducted on the corn cobs, assistance of workers is not needed, the axis of the corn cobs and the rotation center of the corn cobs are recombined, and the threshing quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of corn threshing, and in particular to a corn thresher. Background Art

[0002] There are two main types of corn threshing, one is dry corn threshing, the other is fresh corn threshing. Since dry corn kernels are hard and not easily damaged, threshing is relatively easy, and related threshing devices are relatively mature. The principle is to scrape and detach the dry corn cobs with tools, thereby removing the dry corn kernels from the corn cobs.

[0003] However, fresh corn kernels are relatively tender and crisp, and scraping and threshing can easily cause them to be damaged. In order to ensure the integrity of the corn kernels, the threshing of fresh corn cobs is currently mainly done manually, which is inefficient and labor-intensive. There are also some threshing devices for fresh corn, which use tools to drive the corn cobs to rotate rapidly and cooperate with cutters for threshing. The principle is: make the blade of the cutter close to one end of the corn cob, and when the corn cob rotates rapidly, control the tool to move along the axial direction of the corn cob to cut the connection between the corn kernels and the corn cob, thereby achieving threshing.

[0004] In the fresh corn threshing device currently used, it is difficult to realize automatic loading due to the difference in diameter of corn cobs, and manual assistance is required. The worker inserts the corn cob into the rotating tool and adjusts the position of the corn cob so that the axis of the corn cob coincides with the rotation center as much as possible. The rotating tool then drives the corn cob to rotate rapidly. If the axis of the corn cob and its rotation center are misaligned, it is easy to affect the threshing quality, resulting in incomplete threshing. Even during the threshing process, the corn cob may be directly cut off by the tool, affecting the normal threshing operation. Summary of the invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a corn thresher, which can mechanically center the corn cob without the assistance of workers, so that the axis of the corn cob coincides with its rotation center, thereby ensuring the threshing quality.

[0006] The present application provides a corn thresher, comprising: frame; A threshing mechanism, wherein the frame is provided with a plurality of threshing mechanisms, the threshing mechanism comprising a charging barrel, a threshing bucket, and a centering assembly, wherein the charging barrel is vertically fixedly mounted on the frame, a threshing bucket is mounted at the bottom of the charging barrel, and a centering assembly for adjusting the axis position of the corn cob is also mounted on the charging barrel, and the corn cob and the threshing bucket can be kept concentric by the centering assembly; A driving mechanism, wherein the frame is provided with a driving mechanism corresponding to the threshing mechanism, and the driving mechanism can pierce and fix the corn cobs, and drive the corn cobs to rotate and rise and fall, so as to cooperate with the threshing bucket to perform threshing operation on the corn cobs; When the corn cob enters the loading barrel, its pointed end needs to face downward and its tail end needs to face upward. Under the action of gravity, the pointed end of the corn cob will be stuck at the outlet of the threshing bucket, so that its pointed end is centered. The tail end of the corn cob can be centered through the centering component, so that the driving mechanism, corn cob and threshing mechanism are coaxial from top to bottom.

[0007] Optionally, in some embodiments, the threshing bucket includes a bucket body, a knife, a slide rail, a telescopic guide rod, a first spring, and a pulley. The bucket body is slidably connected to the left and right sides of the slide rail, and the bucket bodies on both sides are symmetrically arranged. The bucket body is a semi-vertebral structure, and the bucket bodies on both sides can be closed and combined into a complete conical funnel. Knives for threshing are fixedly connected to the bottom of the two bucket bodies. A telescopic guide rod is also fixedly connected to the frame, and a pulley corresponding to the bucket body is arranged at the end of the telescopic guide rod, and a first spring corresponding to the pulley is sleeved on the telescopic guide rod. The first spring can make the pulley always press against the outer wall of the bucket body, so that the bucket bodies on both sides remain in a closed state.

[0008] Optionally, in some embodiments, the cutter is in a semicircular ring structure, and the cutters on both sides can be closed to form a complete ring, the diameter of the ring is smaller than the diameter of the pointed end of the corn cob, and the cutting edge of the cutter faces upward, which is convenient for threshing the corn cob.

[0009] Optionally, in some embodiments, a limiting protrusion is provided at the middle position of the slide rail, and the travel of the bucket body can be limited by the limiting protrusion, so that the bucket bodies on both sides can be concentric with the loading barrel when closed.

[0010] Optionally, in some embodiments, the centering assembly includes a turntable, a centering rod, and a positioning plate. The turntable is rotatably installed on the loading barrel, and a plurality of arc-shaped slide grooves are evenly opened on the turntable, one end of the slide groove is close to the loading barrel, and the other end is away from the loading barrel. A plurality of centering rods are connected to the side wall of the loading barrel along its radial sliding direction. One end of the centering rod is slidably connected in the slide groove, and the other end passes through the loading barrel and is connected to the positioning plate. When the turntable rotates, the centering rod can slide along the radial direction of the loading barrel, thereby tightening or loosening the corn cob.

[0011] Optionally, in some embodiments, one end of the centering rod located in the charging barrel is slidably connected to a sliding rod, the end of the sliding rod is fixedly connected to the positioning plate, and a second spring is further provided between the centering rod and the positioning plate.

[0012] Optionally, in some embodiments, driving teeth are evenly arranged on the edge of the turntable, adjacent turntables are meshed and connected by the driving teeth, and the sliding grooves on adjacent turntables are arranged in opposite directions, so that the movement trends of all centering rods remain synchronized.

[0013] Optionally, in some embodiments, the driving mechanism includes a telescopic rod, a second motor, and spikes. A cross bar is provided on the top of the frame, one end of the telescopic rod is fixed on the cross bar, and the second motor is fixedly installed at the other end, and a spike is fixedly connected to the output shaft of the second motor.

[0014] Optionally, in some embodiments, the spikes are flat structures.

[0015] Optionally, in some embodiments, a filter plate corresponding to the threshing bucket is installed at the bottom of the frame, and a discharge plate is installed below the filter plate.

[0016] The technical solution provided by this application may have the following beneficial effects: The present application can mechanically center the corn cob through the centering component, so that the axis of the corn cob coincides with its rotation center, so that the corn cob remains stable during rapid rotation, which is convenient for subsequent threshing; the threshing bucket can keep the tool close to the corn cob at all times, and cooperate with the driving mechanism to ensure the threshing quality.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0019] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a partial structural diagram of this application; Figure 3 It is a side view of the local structure of the present application; Figure 4 It is a structural schematic diagram of the driving mechanism of the present application; Figure 5 It is a structural schematic diagram of the threshing mechanism of the present application; Figure 6 is a top view of the threshing mechanism of the present application; Figure 7 It is a partial structural schematic diagram of the threshing mechanism of the present application; Figure 8 yes Figure 7 A magnified schematic diagram of the middle A area; Fig. 9 It is a partial structural schematic diagram of the threshing mechanism of the present application.

[0020] Reference numerals: 1-frame, 11-housing, 12-crossbar, 13-filter plate, 14-discharging plate; 2-feed chute; 3-threshing mechanism, 31-first bracket, 32-charging barrel, 321-baffle; 33-threshing bucket, 331-bucket body, 332-knife, 333-mounting plate, 334-slide rail, 3341-limiting protrusion, 335-telescopic guide rod, 336-pulley, 337-first spring; 34-centering assembly, 341-turntable, 342-slide groove, 343-centering rod, 344-slide rod, 345-second spring, 346-positioning sheet; 35-second bracket, 36-first motor; 4-driving mechanism, 41-telescopic rod, 42-second motor, 43-spike; 5-belt conveyor, 51-partition plate; 6-Corn on the cob. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] See also Figure 1-9 , a corn thresher, comprising: The frame 1 is made of square steel welded together, and an iron shell 11 is wrapped around the outside of the frame 1 to protect the internal components; Threshing mechanism 3, see Figure 5-8 In this embodiment, three groups of threshing mechanisms 3 are arranged on the frame 1, and the threshing mechanisms 3 include a charging barrel 32, a threshing bucket 33, and a centering component 34. A first bracket 31 is fixedly installed on the frame 1, and three charging barrels 32 are fixedly connected to the first bracket 31 in parallel. The charging barrel 32 is a cylindrical structure with upper and lower openings, and the charging barrels 32 are all arranged vertically. A second bracket 35 is also fixedly installed on the frame 1, and a threshing bucket 33 corresponding to the bottom position of the charging barrel 32 is installed on the second bracket 35. A centering component 34 for adjusting the axial position of the corn cob 6 is also installed on the charging barrel 32, and the corn cob 6 and the threshing bucket 33 can be kept concentric through the centering component 34; The frame 1 is provided with a driving mechanism 4 corresponding to the threshing mechanism 3. The driving mechanism 4 can pierce and fix the corn cob 6, and drive the corn cob 6 to rotate and lift, so as to cooperate with the threshing bucket 33 to perform threshing operation on the corn cob 6; When the corn cob 6 enters the loading barrel 32, its pointed end should face downward and its tail end should face upward. Under the action of gravity, the pointed end of the corn cob 6 will be stuck at the outlet of the threshing bucket 33, so that its pointed end is centered. The tail end of the corn cob 6 can be centered through the centering component 34, so that the driving mechanism 4, the corn cob 6 and the threshing mechanism 3 are coaxial from top to bottom.

[0026] See also Fig. 9 The threshing bucket 33 includes a bucket body 331, a cutter 332, a slide rail 334, a telescopic guide rod 335, a pulley 336, and a first spring 337. A plurality of mounting plates 333 are arranged on the second bracket 35. Two slide rails 334 are fixedly connected between the two mounting plates 333, and the two slide rails 334 are arranged in parallel. A limiting protrusion 3341 is arranged at the middle position of the slide rail 334. The slide rail 334 is divided into two left and right sections with the limiting protrusion 3341 as the boundary. The bucket body 331 is slidably connected to the left and right sections of the slide rails 334. The bucket bodies 331 on both sides are symmetrically arranged. The bucket body 331 has a semi-vertebral structure. The bucket bodies 331 on both sides can be closed and combined into a complete conical funnel. The bottom of the two bucket bodies 331 is fixedly connected with a cutter 332 for threshing. The cutter 332 is a semicircular ring structure. The cutters 332 on both sides can be closed to form a complete ring. The diameter of the ring is smaller than the diameter of the tip end of the corn cob 6, and the cutting edge of the cutter 332 faces upward, which is convenient for threshing the corn cob 6. A telescopic guide rod 335 is also fixedly connected to the mounting plate 333. The end of the telescopic guide rod 335 is provided with a pulley 336 corresponding to the bucket body 331, and the telescopic guide rod 335 is sleeved with a first spring 337 corresponding to the pulley 336. The first spring 337 can make the pulley 336 always press against the outer wall of the bucket body 331, so that the bucket bodies 331 on both sides are kept in a closed state. Further, the travel of the bucket body 331 can be limited by the limiting protrusion 3341, so that the bucket bodies 331 on both sides can be aligned with the bottom of the charging barrel 32 when they are closed, which is convenient for threshing.

[0027] See also Figure 6-8 The centering component 34 includes a turntable 341, a centering rod 343, and a positioning piece 346. The turntable 341 is rotatably installed on the loading barrel 32, and a plurality of arc-shaped slide grooves 342 are evenly opened on the turntable 341. One end of the slide groove 342 is close to the loading barrel 32, and the other end is away from the loading barrel 32. A plurality of centering rods 343 are connected to the side wall of the loading barrel 32 along its radial sliding connection. The number of centering rods 343 can be increased or decreased according to demand. It is necessary to ensure that the number of centering rods 343 is the same as the number of slide grooves 342 and corresponds to each other one by one. In the present embodiment, six centering rods 343 are provided, one end of the centering rod 343 is slidably connected in the slide groove 342, and the other end passes through the loading barrel 32 and is connected to the positioning piece 346. When the turntable 341 rotates, the centering rod 343 can slide along the radial direction of the loading barrel 32, thereby tightening or loosening the corn cob 6.

[0028] Furthermore, in order to facilitate the control of the rotation of the turntable 341, driving teeth are evenly arranged on the edge of the turntable 341, and the adjacent turntables 341 are meshed and connected by the driving teeth, and the slide grooves 342 on the adjacent turntables 341 are arranged in opposite directions, so that the movement trends of all the centering rods 343 remain synchronized, and a first motor 36 for driving the turntable 341 is also installed on the frame 1.

[0029] During use, the corn cob 6 is loaded by the belt conveyor 5. To facilitate loading, a partition 51 is installed on the belt conveyor 5 to form a conveying channel corresponding to the feeding chute 2. After the corn cob 6 enters the feeding chute 2, it slides into the loading barrel 32. To ensure that the corn cob 6 slides into the loading barrel 32 smoothly, a baffle 321 is also provided on the loading barrel 32. After entering the loading barrel 32, under the action of gravity, the pointed end of the corn cob 6 slides into and is stuck at the outlet of the threshing bucket 33, and contacts with the cutting edge of the tool 332. The tail end of the corn cob 6 rests on the inner wall of the loading barrel 32. At this time, the turntable 341 is driven to rotate by the first motor 36, so that the centering rod 343 approaches and tightens the tail end of the corn cob 6, so that the corn cob 6 remains vertical as a whole, completing the centering, which is convenient for subsequent puncture and fixation.

[0030] See also Figure 2-4 The driving mechanism 4 includes a telescopic rod 41, a second motor 42, and a spike 43. A cross bar 12 is arranged on the top of the frame 1. One end of the telescopic rod 41 is fixed on the cross bar 12, and the other end is fixedly installed with the second motor 42. The output shaft of the second motor 42 is fixedly connected with a spike 43. The telescopic rod 41 is an electric telescopic rod. It should be noted that, see Figure 3 The output shaft of the second motor 42, the spike 43, the charging barrel 32 and the threshing bucket 33 need to be kept concentric during installation.

[0031] After the corn cob 6 is centered, the telescopic rod 41 is controlled to extend, driving the second motor 42 to descend, so that the spike 43 is inserted from the tail end of the corn cob 6. When the spike 43 is fully inserted into the corn cob 6, the telescopic rod 41 is paused, and then the centering component 34 is controlled to release the corn cob 6, and the second motor 42 is started to make the corn cob 6 rotate rapidly. At this time, the telescopic rod 41 continues to extend, driving the rotating corn cob 6 to descend, and the threshing bucket 33 is opened. The cutter 332 always presses against the corn cob under the action of elastic force, and cuts the connection between the corn cob and the corn kernels to achieve threshing. When the corn cob 6 is completely threshed, the threshing bucket 33 loses support and closes again. At this time, the telescopic rod 41 is shortened and reset. Since the outlet diameter of the threshing bucket 33 is smaller than the diameter of the tail end of the corn cob 6, the corn cob 6 slips off the spike 43 under the obstruction of the threshing bucket 33, and a threshing operation is completed.

[0032] Furthermore, the spike 43 is a flat structure, which prevents the corn cob 6 from rotating on the spike 43 and ensures stability during puncture and fixation.

[0033] See also Figure 3A filter plate 13 corresponding to the threshing bucket 33 is installed at the bottom of the frame 1, and a discharge plate 14 is installed below the filter plate 13. The corn cobs after threshing fall on the filter plate 13 and roll out of the device along the filter plate 13. The corn kernels pass through the filter plate 13, fall on the discharge plate 14, and are led out of the device along the discharge plate 14 for unified collection.

[0034] In some embodiments, since the corn cob 6 is not a perfect cylindrical structure, there may be unevenness in some areas. When centering, some positioning pieces 346 have already contacted the corn cob 6, while some positioning pieces 346 have not yet contacted the corn cob 6. Since all positioning pieces 346 need to be pressed against the corn cob 6 to tighten it, in order to avoid crushing the corn kernels, a sliding rod 344 is slidably connected to one end of the centering rod 343 located in the charging barrel 32, and the end of the sliding rod 344 is fixedly connected to the positioning piece 346, and a second spring 345 is also provided between the centering rod 343 and the positioning piece 346. Thus, the contact mode between the positioning piece 346 and the corn kernel is changed from rigid contact to elastic contact, leaving a buffer margin to prevent the corn kernels from being crushed when the corn cob 6 is tightened.

[0035] How it works: The worker puts the corn cob 6 into the conveying channel. When putting it in, it is necessary to ensure that the pointed end of the corn cob 6 faces the feeding chute 2. The corn cob 6 falls into the charging barrel 32 through the feeding chute 2. Under the action of gravity, the pointed end of the corn cob 6 slides into and is stuck at the outlet of the threshing bucket 33, and contacts the cutting edge of the cutter 332. The tail end of the corn cob 6 rests on the inner wall of the charging barrel 32. The tail end of the corn cob 6 is centered by the centering component 34, so that the axis of the corn cob 6 coincides with the charging barrel 32 and the threshing bucket 33. The centering is completed. After that, by controlling the extension of the telescopic rod 41, the second motor 42 is driven to descend, so that the spike 43 is inserted from the tail end of the corn cob 6 to pierce and fix the corn cob 6. Then, the centering assembly 34 is controlled to release the corn cob 6, and the second motor 42 is started to make the corn cob 6 rotate rapidly. At this time, the telescopic rod 41 continues to extend, driving the rotating corn cob 6 to descend, and the threshing bucket 33 is opened. The cutter 332 always presses against the corn cob under the action of elastic force, and cuts the connection between the corn cob and the corn kernels to achieve threshing. When the corn cob 6 is completely threshed, the threshing bucket 33 loses support and closes again. At this time, the telescopic rod 41 is shortened and reset. Since the outlet diameter of the threshing bucket 33 is smaller than the diameter of the tail end of the corn cob 6, the corn cob 6 slips off the spike 43 under the obstruction of the threshing bucket 33, and a threshing operation is completed.

[0036] Finally, it should be noted that, in this article, relationships such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A corn thresher, characterized in that: include Rack(1); A threshing mechanism (3), wherein the frame (1) is provided with a plurality of threshing mechanisms (3), the threshing mechanism (3) comprising a loading barrel (32), a threshing bucket (33), and a centering assembly (34), wherein the loading barrel (32) is fixedly mounted on the frame (1) in a vertical direction, the threshing bucket (33) is mounted at the bottom of the loading barrel (32), and the loading barrel (32) is also provided with a centering assembly (34) for adjusting the axial position of a corn cob (6), and the corn cob (6) and the threshing bucket (33) can be kept concentric by the centering assembly (34); A driving mechanism (4), wherein the frame (1) is provided with a driving mechanism (4) corresponding to the threshing mechanism (3) in a one-to-one manner, and the driving mechanism (4) can pierce and fix the corn cobs (6) and drive the corn cobs (6) to rotate and rise and fall, thereby cooperating with the threshing bucket (33) to perform a threshing operation on the corn cobs (6); When the corn cob (6) enters the loading barrel (32), its pointed end is directed downward and its tail end is directed upward. Under the action of gravity, the pointed end of the corn cob (6) is stuck at the outlet of the threshing bucket (33), so that its pointed end is centered. The tail end of the corn cob (6) can be centered by the centering component (34), so that the driving mechanism (4), the corn cob (6) and the threshing mechanism (3) are coaxial from top to bottom.

2. The corn thresher according to claim 1, characterized in that: The threshing bucket (33) comprises a bucket body (331), a cutter (332), a slide rail (334), a telescopic guide rod (335), a pulley (336), and a first spring (337). The left and right sides of the slide rail (334) are both slidably connected to the bucket body (331), and the bucket bodies (331) on both sides are symmetrically arranged. The bucket body (331) is a semi-vertebral structure. The bucket bodies (331) on both sides can be closed and combined into a complete conical funnel. A cutter (332) for threshing is fixedly connected to the bottom, and a telescopic guide rod (335) is also fixedly connected to the frame (1). A pulley (336) corresponding to the bucket body (331) is arranged at the end of the telescopic guide rod (335), and a first spring (337) corresponding to the pulley (336) is sleeved on the telescopic guide rod (335). The first spring (337) can make the pulley (336) always press against the outer wall of the bucket body (331), so that the bucket bodies (331) on both sides are kept in a closed state.

3. The corn thresher according to claim 2, characterized in that: The cutter (332) is in a semicircular ring structure, and the cutters (332) on both sides can be closed to form a complete ring, the diameter of the ring is smaller than the diameter of the pointed end of the corn cob (6), and the cutting edge of the cutter (332) faces upward, so as to facilitate threshing of the corn cob (6).

4. The corn thresher according to claim 3, characterized in that: A limiting protrusion (3341) is provided at the middle position of the slide rail (334), and the travel of the bucket body (331) can be limited by the limiting protrusion (3341), so that the bucket bodies (331) on both sides can be concentric with the charging barrel (32) when they are closed.

5. The corn thresher according to claim 1, characterized in that: The centering assembly (34) comprises a rotating disk (341), a centering rod (343), and a positioning piece (346). The rotating disk (341) is rotatably mounted on the loading barrel (32), and a plurality of arc-shaped sliding grooves (342) are evenly formed on the rotating disk (341). One end of the sliding groove (342) is close to the loading barrel (32), and the other end is away from the loading barrel (32). A plurality of centering rods (343) are slidably connected to the side wall of the loading barrel (32) along its radial direction. One end of the centering rod (343) is slidably connected in the sliding groove (342), and the other end passes through the loading barrel (32) and is connected to the positioning piece (346). When the rotating disk (341) rotates, the centering rod (343) can slide along the radial direction of the loading barrel (32), thereby tightening or loosening the corn cob (6).

6. The corn thresher according to claim 5, characterized in that: One end of the centering rod (343) located in the loading barrel (32) is slidably connected to a sliding rod (344), an end of the sliding rod (344) is fixedly connected to a positioning piece (346), and a second spring (345) is further provided between the centering rod (343) and the positioning piece (346).

7. The corn thresher according to claim 6, characterized in that: The edges of the rotating disks (341) are evenly provided with driving teeth, and adjacent rotating disks (341) are meshed and connected via the driving teeth. The slide grooves (342) on adjacent rotating disks (341) are arranged in opposite directions, so that the movement trends of all centering rods (343) remain synchronized.

8. The corn thresher according to claim 1, characterized in that: The driving mechanism (4) comprises a telescopic rod (41), a second motor (42), and a spike (43); a cross bar (12) is arranged on the top of the frame (1); one end of the telescopic rod (41) is fixed to the cross bar (12); the second motor (42) is fixedly mounted on the other end; and the spike (43) is fixedly connected to the output shaft of the second motor (42).

9. The corn thresher according to claim 8, characterized in that: The spike (43) has a flat structure.

10. The corn thresher according to claim 1, characterized in that: A filter plate (13) corresponding to the threshing bucket (33) is installed at the bottom of the frame (1), and a discharge plate (14) is installed below the filter plate (13).

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