Adaptive regulation type bar tooth assembly and threshing cylinder based on threshing force detection

Abstract

The application discloses a self-adaptive adjusting type rod tooth assembly and a threshing cylinder based on threshing force detection, which comprises a fixed cylinder, a spring and a rod tooth, a cavity I is formed in the fixed cylinder, the first end of the rod tooth is located in the cavity I, the second end of the rod tooth is outwardly extended through the perforation of the top surface of the fixed cylinder, the spring is arranged in the cavity I, and the two ends of the spring are respectively in contact with the first end of the rod tooth and the inner bottom surface of the cavity I of the fixed cylinder. Through the structural improvement, the device effectively solves the problems that the length of the rigid rod tooth of the threshing cylinder and the gap between the concave plates are not easy to adjust in the prior art, can adapt to the threshing requirements of various crops, and realizes efficient and low-loss threshing operation.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery, specifically relating to an adaptive adjustable rod tooth assembly and threshing drum based on threshing force detection. Background Technology

[0002] The threshing element is one of the core components of the threshing drum in mechanized crop harvesting. Currently, the threshing elements used in threshing drums are mainly rigid rods, whose length is difficult to adjust in real time according to the working conditions inside the drum during operation. In actual threshing, different crops require different threshing forces, as shown in Table 1, and the threshing force required for the same crop also varies under different conditions. For example, when the material feed rate suddenly increases or the moisture content is high, the rigid rods of the threshing drum are easily clogged due to limitations such as the difficulty in adjusting the rod length and the gap between the concave plates, thus affecting work efficiency and operation quality.

[0003] Table 1. Threshing Capacity Range of Typical Crops Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide an adaptive adjustable rod and tooth assembly and threshing drum based on threshing force detection. This device can adapt to the threshing needs of various crops, thereby achieving efficient and low-damage threshing operations.

[0005] To achieve the above objectives, one objective of this invention is to provide an adaptive adjustable rod tooth assembly based on threshing force detection, comprising a fixed cylinder, a spring, and rod teeth. A cavity I is formed inside the fixed cylinder. The first end of the rod teeth is located inside the cavity I, and the second end of the rod teeth extends outward from a perforation on the top surface of the fixed cylinder. The spring is disposed inside the cavity I, and both ends of the spring contact the first end of the rod teeth and the inner bottom surface of the cavity I, respectively.

[0006] As a preferred embodiment, a bottom end cap is provided at the bottom opening of the fixed cylinder, and the fixed cylinder and the bottom end cap are fixedly connected to form cavity I; the rod tooth includes a base and a top rod vertically arranged on the base, the top rod is coaxially arranged with the base, the base is located in cavity I, and the two ends of the spring are in contact with the base and the bottom end cap respectively.

[0007] As a preferred embodiment, a pressure sensor is fixedly installed at the end of the push rod to detect the compressive force applied to the end of the push rod.

[0008] As a preferred embodiment, a one-way ratchet is provided on the outer edge of the base of the rod tooth, and a movable rack is hinged to the inner wall of the fixed cylinder. The movable rack has two working positions. The movable rack can rotate around the hinge end toward the side closer to the rod tooth to the first position, at which time the movable rack and the one-way ratchet are engaged. The movable rack can rotate around the hinge end toward the side farther from the rod tooth to the second position, at which time the movable rack and the one-way ratchet are disengaged.

[0009] As a preferred embodiment, the inner wall of the fixed cylinder is further provided with a rack control assembly for controlling the rotation of the movable rack. The rack control assembly includes a spring plate and an electromagnet. The spring plate is U-shaped and includes a first short arm and a second short arm. The first short arm and the electromagnet are fixed on the fixed cylinder, and the second short arm is in contact with the movable rack. The electromagnet is used to receive control commands from the controller to control the movable rack to switch positions between two working positions.

[0010] As a preferred embodiment, the controller is connected to the pressure sensor signal to acquire the extrusion force signal at the end of the tooth and send control commands to the rack control assembly to adjust the working position of the movable rack via an electromagnet.

[0011] As a preferred embodiment, the rod tooth has a hollow cavity II formed along the axial direction, and a threaded hole for fixing the pressure sensor is provided at the end of the top rod away from the base. A controller is fixed on the base, and the wire of the pressure sensor is connected to the controller signal through the cavity II.

[0012] As a preferred embodiment, a limiting groove is formed on the end face of the bottom end cap facing the fixed cylinder, and one end of the spring is located in the limiting groove.

[0013] The second objective of this invention is to provide a threshing drum, comprising a drum and an adaptive adjustable rod tooth assembly based on threshing force detection as described in any of the above claims, wherein the adaptive adjustable rod tooth assembly is disposed on the outer cylindrical surface of the drum.

[0014] As a preferred embodiment, the adaptive adjustable rod tooth assembly is installed in a spiral manner around the outer cylindrical surface of the drum; and the axial direction of the adaptive adjustable rod tooth assembly is arranged radially along the cross-section of the drum, and the fixing cylinder of the adaptive adjustable rod tooth assembly is embedded in and fixed within the outer cylindrical surface of the drum.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] Firstly, this invention improves the structure of the rod tooth assembly, including a fixed cylinder and retractable rod teeth installed within the fixed cylinder. The rod teeth can extend and retract according to the extrusion force at their ends, and achieve adaptive adjustment of the rod tooth position by reaching a balance between the extrusion force at the inner and outer ends of the rod teeth and the spring force. Through structural improvements, this invention effectively solves the limitations of existing technologies where rigid rod teeth in threshing drums are difficult to adjust due to rod tooth length and concave plate gap. It can adapt to threshing operations under different working conditions and effectively solves the problem of clogging caused by sudden increases in feed rate or high humidity. The rod teeth can automatically adapt and adjust within the fixed cylinder, automatically adjusting the gap between the rod tooth ends and the concave plate screen, reducing the probability of clogging in the threshing device, thereby improving work efficiency and operation quality to a certain extent.

[0017] Secondly, this invention includes a pressure sensor at the end of the threshing rod to detect the compressive force applied to its end, and a controller to acquire the pressure sensor signal. The controller compares the compressive force signal with the threshing force range, and then uses a rack and pinion control assembly to limit the position of the threshing rod. When the compressive force at the end of the threshing rod is less than the minimum value of the threshing force range, the controller disengages the movable rack from the one-way ratchet. At this time, the threshing rod is not obstructed by the movable rack and can extend outward to achieve a new working equilibrium. When the compressive force at the end of the threshing rod is within the threshing force range, the movable rack and the one-way ratchet are in a basically balanced state. However, if the compressive force at the outer end of the threshing rod increases sharply, the threshing rod can be further compressed into the fixed cylinder. This invention, through the extension and retraction adjustment of the threshing rod, and the cooperation of the rack and pinion control assembly, pressure sensor, and controller, solves the problem of automatically adjusting the position of the threshing rod under different conditions, allowing the threshing device to adaptively adjust to achieve a new equilibrium according to different working states.

[0018] Thirdly, this solution also provides a threshing drum. By installing the aforementioned rod and tooth assembly, the threshing drum of this solution can automatically and adaptively adjust based on the detection of threshing force, thereby changing the extension length of the rod and teeth outside the drum. At the same time, it achieves the purpose of adjusting the gap width between the rod and teeth and the concave screen, effectively solving the problem of crop blockage caused by the threshing device. It can effectively ensure the efficiency and quality of threshing operations. In addition, the spring of the rod and tooth assembly of this device can be replaced with a suitable spring according to different crops, so that this device can be used for threshing different crops, thus improving the applicable operating range of this device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a diagram showing the internal structure of the adaptive adjustment lever teeth of the present invention;

[0021] Figure 2 This is a perspective view of the rod tooth in this invention;

[0022] Figure 3 This is a cross-sectional view of the rod tooth in this invention;

[0023] Figure 4 This is a front view of the rod tooth in this invention:

[0024] Figure 5 This is a top view of the rod tooth in this invention;

[0025] Figure 6 A perspective view of the ratchet teeth in this invention: featuring a unidirectional ratchet rack;

[0026] Figure 7 This is an exploded view of the rod tooth assembly of the present invention;

[0027] Figure 8 This is a perspective view of the rod tooth assembly of the present invention;

[0028] Figure 9 This is a schematic diagram of the threshing drum of the present invention;

[0029] The markings in the diagram are: 1. Concave screen, 2. Adaptive adjustable rod tooth assembly, 3. Roller, 4. Fixed cylinder, 41. Pin hole, 42. Cavity I, 43. Groove I, 44. Perforation, 5. Spring plate, 6. Electromagnet, 7. Movable rack, 71. Rack hole, 8. One-way ratchet rack, 9. Rod tooth, 91. Base, 92. Top rod, 93. Side groove notch, 94. Threaded hole, 95. Groove II, 96. Cavity II, 10. Pressure sensor, 11. Controller, 12. Spring, 13. Pin, 14. Bottom end cap, 15. Limiting groove. Detailed Implementation

[0030] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0032] As shown in the figure, this embodiment provides an adaptive adjustable rod tooth assembly based on threshing force detection, including a fixed cylinder 4. The fixed cylinder 4 has a cavity I 42 inside. The first end of the rod tooth 9 is disposed in the cavity I 42, and the second end of the rod tooth 9 extends outward from the fixed cylinder 4. A spring 12 is disposed in the cavity I 42. The spring 12 is located between the rod tooth 9 and the inner bottom surface of the fixed cylinder 4. One end of the spring 12 contacts the first end of the rod tooth 9, and the other end contacts the bottom surface of the cavity I 42. With this design, the spring 12 provides a certain elastic force to the rod tooth 9, thereby enabling adaptive adjustment of the length of the rod tooth 9.

[0033] In this embodiment, the structure of the fixed cylinder 4 can be implemented as follows: the bottom opening of the fixed cylinder 4 and the bottom end cap 14 form a cavity I 42. A through hole 44 is formed at the center of the top wall of the fixed cylinder 4 opposite to the bottom end cap 14. The through hole 44 is used for the outward extension of the rod tooth 9 and for telescopic adjustment within the through hole 44. A groove I 43 for fixing the rack control assembly is formed on the circumferential inner side wall of the fixed cylinder 4. A limiting groove 15 with a certain axial length is provided at the bottom center of the bottom end cap 14. The limiting groove 15 is a hollow cylindrical structure. One end of the spring 12 is set inside the limiting groove 15 to limit the fixed position of one end of the spring 12. The function of the limiting groove 15 is to limit one end of the spring 12 inside the limiting groove 15. By limiting the installation position of the spring 12 within a specific area, the rod tooth 9 can obtain a more stable restoring force.

[0034] In this design, the lever tooth 9 can adopt the following structure: the lever tooth 9 includes a base 91 and a top rod 92 disposed at the center of one end face of the base 91. The base 91 has a disc-shaped structure, and the top rod 92 is disposed perpendicular to the end face of the base 91. A side groove 93 is formed at the circumferential position of the edge of the base 91. A one-way ratchet rack 8 is fixedly installed in the side groove 93. The length direction of the one-way ratchet rack 8 is arranged along the axial direction of the lever tooth 9. Preferably, there are 3-6 side groove 93 evenly distributed along the edge of the base 91. More preferably, there are 4 side groove 93. Each side groove 93 is fixedly installed inside by bolts. There is one unidirectional ratchet 8, and four sets of unidirectional ratchet 8 are evenly fixed around the base 91. A groove II 95 is formed at the end of the top rod 92. The purpose of groove II 95 is to fix and install pressure sensor 10. Pressure sensor 10 is a piezoelectric pressure sensor used to detect the compressive force on the top of the rod tooth 9. The piezoelectric pressure sensor can convert the pressure signal into an electrical signal (i.e., current) through the controller 11 and transmit the compressive force signal to the controller 11. A threaded hole 94 is provided at the bottom of groove II 95. The threaded hole 94 is used to tighten and fix pressure sensor 10 through the threaded structure. A cavity II 96 is formed along the axial direction of the rod tooth 9. Cavity II 96 is arranged through the entire axial direction of the rod tooth 9, and one end of cavity II 96 is connected to threaded hole 94. Controller 11 is fixedly installed on the end face of base 91. Cavity II 96 is used for the signal line to pass through when the pressure sensor 10 is installed. The signal line is used for signal transmission between pressure sensor 10 and controller 11. This design achieves the coordinated movement of the lever teeth 9 and the one-way ratchet rack 8 through the cooperation and fixation of the lever teeth 9 and the one-way ratchet rack 8.

[0035] In this scheme, when the crop pressing force is less than the minimum threshing force within the threshing force range, the controller 11 sends a control signal to the rack control assembly to disengage the movable rack 7 from the one-way ratchet 8, thereby eliminating the obstruction of the movable rack 7 to the movement of the rod tooth 9 in the extension direction, so as to ensure that the rod tooth 9 can extend outward along the axial direction to the outside of the fixed cylinder 4.

[0036] When the crop pressing pressure exceeds the maximum threshing force within the threshing force range, the pressure sensor 10 and controller 11 do not function. At this time, under the elastic force of the spring plate 5, the spring plate 5 naturally extends and presses against the movable rack 7. The movable rack 7 and the one-way ratchet 8 are in a meshing state. The rod tooth 9 can be compressed in the positive meshing direction to reach a new position (the contraction direction of the rod tooth 9). At this time, due to the cooperation between the movable rack 7 and the one-way ratchet 8, the one-way ratchet 8 can only move in the positive direction. Therefore, the rod tooth 9 cannot extend outward. As the position of the rod tooth 9 is adjusted, the pressing force on the rod tooth 9 and the spring force of the spring 12 will reach a balance again.

[0037] When the pressure sensor 10 detects the extrusion force within the threshing force range set by the controller 11 (i.e., greater than the minimum threshing force but less than the maximum threshing force), the extrusion force from the crop on the outer end of the tooth 9, the force from the spring 12 on the inner end of the tooth 9, and the meshing force of the two racks combine to maintain a basic equilibrium between the forces on the inner and outer ends of the tooth 9. At this time, the tooth 9 maintains a basically stable axial position and will not move significantly along the axial direction. However, because the movable rack 7 and the one-way ratchet rack 8 use the aforementioned specific structure of external teeth, when the extrusion force at this point surges beyond the set threshing force range, the tooth 9 can only compress inward. When the extrusion force at this point decreases beyond the set threshing force range, the movable rack 7 needs to be rotated open before the tooth 9 can extend outward. The purpose of this one-way tooth design is to ensure that under normal fluctuations in the threshing force range, the position of the tooth 9 will not arbitrarily change its axial position with the normal fluctuations in the threshing force range, thereby ensuring that the position of the tooth 9 is basically fixed under normal operation within the threshing force range.

[0038] In a typical embodiment of the present invention, the rack control assembly includes a spring plate 5, an electromagnet 6, and a movable rack 7. The spring plate 5 is U-shaped, comprising a U-bend, a first short arm 51 and a second short arm 52 disposed on the U-bend. The first short arm 51 and the electromagnet 6 are fixed within the groove I 43 of the fixed cylinder 4. A protruding structure is formed on the first short arm 51, which cooperates with the electromagnet 6 within the groove I 43 to fix the spring plate 5 and the electromagnet 6 and prevent... To prevent the spring plate 5 and electromagnet 6 from moving, one end of the movable rack 7 is hinged to the side wall of the fixed cylinder 4. The second short arm 52 is in contact with the movable rack 7. Specifically, a pin hole 41 is provided on the side wall of the fixed cylinder 4, and both ends of the pin shaft 13 are fixed in the pin hole 41. The movable rack 7 is provided with a rack hole 71, which is rotatably set on the pin shaft 13, or the movable rack 7 is fixedly connected to the pin shaft 13, and the pin shaft 13 is rotatably set inside the pin hole 41. Both of the above embodiments can realize the rotation of the movable rack 7 relative to the hinge point of the fixed cylinder 4. The movable rack 7 is made of a metal material that can be attracted by the electromagnet 6 when energized. The movable rack 7 can be in contact with the second short arm 52, or the second short arm 52 can be fixed to or integrally set with the movable rack 7, so as to better realize the synchronous movement of the movable rack 7 and the spring plate 5.

[0039] In this invention, the electromagnet 6 is used to receive control commands from the controller 11 to control the movable rack 7 to switch between two working positions. When the extrusion force detected by the pressure sensor 10 is within the range of the threshing force set by the controller 11 or greater than the maximum threshing force, the movable rack 7 is in the first working position, and the electromagnet 6 is not energized. At this time, the electromagnet 6 will not generate magnetic force to attract the movable rack 7, and the first short arm 51 and the second short arm 52 are basically parallel to each other. The second short arm 52 located on the back side of the movable rack 7 will abut against the movable rack 7 in its natural state. At this time, the movable rack 7 is in the first working position, that is, the movable rack 7 and the one-way ratchet 8 are in a state of mutual engagement. It should be noted that when the movable rack 7 and the one-way ratchet 8 are in the engagement state, the rod teeth 9 move towards the retraction cavity I 42. The movement direction of the one-way ratchet 8 relative to the movable rack 7 is a positive engagement mode, while the rod teeth 9 cannot move towards the extension cavity I 42 (the teeth set on the one-way ratchet 8 relative to the movable rack 7 can only move relative to each other in the positive engagement direction, and cannot move relative to each other in the opposite direction in the engagement state). When the pressure sensor 10 detects that the extrusion force at the end of the tooth 9 is lower than the minimum threshing force set by the controller 11, the controller 11 sends a control command to the rack control assembly. The electromagnet 6 is energized, and at this time, the electromagnet 6 generates magnetic force and attracts the movable rack 7. The movable rack 7 presses the second short arm 52 and rotates away from the tooth 9, that is, the end of the second short arm 52 approaches the first short arm 51. At this time, the movable rack 7 is in the second position, and the movable rack 7 and the one-way ratchet 8 are disengaged. The movable rack 7 eliminates the obstruction to the movement of the one-way ratchet 8 in the direction of the tooth 9. In this state, the tooth 9 extends outward under the elastic force of the spring 12, and adaptively adjusts to achieve a state of internal and external force balance under the action of external extrusion force and internal elastic force.

[0040] In this solution, spring 12 can be replaced with a suitable spring according to the threshing force requirements of different crops. When different crops need to be threshed, replacing the spring 12 with a suitable spring can expand the applicability of the adaptive adjustable rod tooth assembly 2.

[0041] This invention also provides a threshing drum, comprising the aforementioned adaptive adjustable rod tooth assembly 2, concave screen 1, and drum 3. The adaptive adjustable rod tooth assembly 2 is fixed to the drum 3 and partially embedded within it. The adaptive adjustable rod tooth assembly 2 is arranged in a circumferential spiral pattern on the outer cylindrical surface of the drum 3, serving to thresh the material and convey the stalks. When threshing different crops, the spring 12 of the adaptive adjustable rod tooth assembly 2 can be replaced. This makes it suitable for threshing different crops, thereby increasing the applicability of the device. Simultaneously, the threshing force range of the controller 11 can be controlled and adjusted to achieve threshing of different crops.

[0042] In this scheme, when the pressure generated between the rod tooth 9 and the crop on the outer wall of the drum 3 exceeds the maximum threshing force set by the controller 11, the controller 11 and the pressure sensor 10 do not function. At this time, due to the action of the spring plate 5, the movable rack 7 and the one-way ratchet rack 8 of the rod tooth 9 are in a positive meshing state. Because the end of the rod tooth 9 is subjected to a large compressive force, the rod tooth 9 can be compressed inward and contracted, and the spring 12 is compressed and contracted until the balance between the inner and outer ends of the rod tooth 9 is reached, and the threshing work continues. Since the material conditions in different areas of the outer wall of the drum 3 are different during operation, the adaptive adjustment rod tooth assembly 2 of this scheme can realize targeted adjustment for specific working conditions in different areas of the outer wall of the drum 3, thereby improving the overall adaptive adjustment effect of the device.

[0043] When the piezoelectric pressure sensor 10 on the threshing tooth 9 is subjected to a small pressure, that is, when the squeezing force at the end of the threshing tooth 9 is less than the minimum value of the threshing force range, the piezoelectric pressure sensor 10 will transmit a squeezing force signal. The controller 11 will then issue a control command, causing the electromagnet 6 to be energized and generate a certain magnetism. The spring plate 5 and the movable rack 7 will be attracted by the electromagnet 6 and pressed together, and the two racks will be disengaged. At this time, the outer end of the threshing tooth 9 will be subjected to the squeezing force of the crop, and the base of the threshing tooth 9 will be subjected to the elastic force of the spring 12. Because the squeezing force of the crop on the threshing tooth 9 is small at this time, the threshing tooth 9 cannot reach a balanced state and will be ejected by the elastic force of the spring 12. The threshing tooth 9 will extend and, under the action of internal and external forces, will reach a new balance again, that is, reach the appropriate threshing force range to continue to complete the threshing work. When no crop is fed into the threshing drum 3, that is, when the pressure on the piezoelectric pressure sensor 10 is zero, the controller 11 will send a control command, and the electromagnet 6 will be energized until the threshing tooth 9 reaches its longest extended state, that is, the reset state.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An adaptive adjustable rod tooth assembly based on threshing force detection, characterized in that: The device includes a fixed cylinder, a spring, and a rod tooth. The fixed cylinder has a cavity I inside. The first end of the rod tooth is located inside the cavity I, and the second end of the rod tooth extends outward from a perforation on the top surface of the fixed cylinder. The spring is disposed inside the cavity I, and both ends of the spring contact the first end of the rod tooth and the inner bottom surface of the cavity I, respectively. The spring is used to provide a certain elastic force to the rod tooth, thereby enabling adaptive adjustment of the rod tooth length. The base of the rod tooth is provided with a one-way ratchet rack on its outer edge, and a movable rack is hinged to the inner wall of the fixed cylinder. The movable rack has two working positions. The movable rack can rotate around the hinge end to the side closer to the rod tooth to the first position. At this time, the movable rack and the one-way ratchet rack are engaged, and the movable rack hinders the movement of the rod tooth in the extension direction, so the rod tooth cannot move in the direction of the extension cavity I. The movable rack can rotate around the hinge end to the side away from the rod tooth to the second position. At this time, the movable rack and the one-way ratchet rack are disengaged, which is used to eliminate the obstruction of the rod tooth by the movable rack, so as to realize the adaptive adjustment of the rod tooth length. The inner wall of the fixed cylinder is also provided with a rack control assembly for controlling the rotation of the movable rack. The rack control assembly includes a spring plate and an electromagnet. The spring plate is U-shaped and includes a first short arm and a second short arm. The first short arm and the electromagnet are fixed on the fixed cylinder. The second short arm is in contact with the movable rack. The electromagnet is used to receive control commands from the controller to control the movable rack to switch positions between two working positions. The controller is connected to a pressure sensor to obtain the extrusion force signal at the end of the rack teeth and send control commands to the rack control assembly to adjust the working position of the movable rack via the electromagnet. When the pressure sensor detects that the extrusion force is within the threshing force range set by the controller, the forces on the inner and outer ends of the rod teeth are in a basically balanced state and will not move significantly along the axial position. When the extrusion force exceeds the set threshing force range, the rod teeth can only compress inward. When the extrusion force decreases to exceed the set threshing force range, the movable teeth rotate and open, and the rod teeth extend outward.

2. The adaptive adjustable rod tooth assembly based on threshing force detection according to claim 1, characterized in that: The bottom opening of the fixed cylinder is provided with a bottom end cap, and the fixed cylinder and the bottom end cap are fixedly connected to form cavity I; the rod tooth includes a base and a top rod vertically arranged on the base, the top rod is coaxially arranged with the base, the base is located in cavity I, and the two ends of the spring are in contact with the base and the bottom end cap respectively.

3. The adaptive adjustable rod tooth assembly based on threshing force detection according to claim 2, characterized in that: A pressure sensor is fixedly installed at the end of the push rod to detect the compressive force applied to the end of the push rod.

4. The adaptive adjustable rod tooth assembly based on threshing force detection according to claim 2, characterized in that: The rod tooth has a hollow cavity II formed along the axial direction. A threaded hole for fixing the pressure sensor is provided at the end of the top rod away from the base. A controller is fixed on the base. The wire of the pressure sensor is connected to the controller signal through the cavity II.

5. The adaptive adjustable rod tooth assembly based on threshing force detection according to claim 2, characterized in that: A limiting groove is formed on the end face of the bottom end cap facing the fixed cylinder, and one end of the spring is located in the limiting groove.

6. A threshing drum, characterized in that: The device includes a drum and an adaptive adjustable rod tooth assembly based on threshing force detection as described in any one of claims 1-5, wherein the adaptive adjustable rod tooth assembly is disposed on the outer cylindrical surface of the drum.

7. A threshing drum according to claim 6, characterized in that: The adaptive adjustable rod tooth assembly is spirally mounted on the outer cylindrical surface of the drum; and the axial direction of the adaptive adjustable rod tooth assembly is radially arranged along the cross-section of the drum, and the fixing cylinder of the adaptive adjustable rod tooth assembly is embedded in the outer cylindrical surface of the drum and fixed.

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