Adjusting sleeve for adjusting the discharge quantity of an auger, auger and spreader

Abstract

The application discloses an adjusting sleeve for adjusting discharging capacity of an auger, a screw conveyor and a spreader, and relates to the technical field of adjusting sleeves. The adjusting sleeve is in the shape of a helically extended belt body, can be wound on the auger along the extending direction of the helical blade of the auger, and can adjust the size of the material conveying space of the auger. The adjusting mode of the adjusting sleeve based on the scheme is not dependent on the speed adjustment of the motor, the adjustable range of the spreading speed is widened, the lowest conveying speed threshold of the auger is further reduced, and the lower conveying speed requirement of a user can be met.

Description

Technical Field

[0001] This application relates to the technical field of material conveying devices, and in particular to an adjusting sleeve for adjusting the discharge volume of an auger, a screw conveyor, and a spreader. Background Technology

[0002] Screw conveyors are commonly used in various material conveying equipment applications, especially for conveying granular materials. For example, in agricultural sowing and plant protection, seeding mechanisms are typically used to spread seeds and fertilizers. Specifically, a seeding mechanism includes a hopper, a conveying pipe, a motor, and an screw. The hopper is installed above the conveying pipe, and the screw is rotatably installed inside the conveying pipe, with one end extending out of the pipe and connected to the motor. Driven by the motor, the screw uses its rotating spiral blades to continuously push the material in the conveying pipe out of the outlet at the end of the pipe, while the material in the hopper continuously replenishes the conveying pipe, thus achieving uniform spreading.

[0003] In a spreading mechanism using an auger to convey materials, the material conveying speed is affected by the rotational speed of the auger and the size of the conveying space formed between the auger and the conveying pipe. Since the size of the conveying space between the auger and the conveying pipe is fixed after they leave the factory, in current operations, when the material conveying speed needs to be adjusted, the operator can only do so by adjusting the motor speed. However, the adjustable range of the motor speed is limited, meaning the minimum spreading speed in the spreading mechanism is finite. During the sowing process, when it is necessary to reduce the sowing density, a slower spreading speed is required. When the required spreading speed is lower than the minimum spreading speed threshold of the existing spreading mechanism, the current spreading mechanism cannot meet the demand. Summary of the Invention

[0004] The purpose of this invention is to provide an adjusting sleeve, a screw conveyor, and a spreader for adjusting the output of an auger, which can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] On the one hand, an adjusting sleeve for adjusting the output of an auger is provided, including an adjusting sleeve body, the adjusting sleeve body being a spirally extending strip that can be wound around the auger along the extending direction of the spiral blades of the auger to adjust the size of the conveying space of the auger.

[0007] Optionally, the adjusting sleeve body includes a first contact surface and a second contact surface, the first contact surface being used to contact the surface of the spiral blade, and the second contact surface being used to contact the surface of the auger shaft.

[0008] Optionally, there is one first contact surface, and the adjusting sleeve body also includes a material contact surface connected between the first contact surface and the second contact surface, wherein the material contact surface is an inclined surface.

[0009] Optionally, the first contact surface has two parts, and the two contact surfaces are respectively used to contact the two sides of the spiral blade.

[0010] Optionally, the adjusting sleeve body is provided with a recess corresponding to the anti-jamming notch on the spiral blade.

[0011] Optionally, the adjusting sleeve body is provided with a plurality of positioning holes at intervals along its own spiral direction, the positioning holes allowing screws to pass through to fix the adjusting sleeve body to the auger.

[0012] Optionally, the adjusting sleeve body has a recessed groove on the side facing away from the shaft that contacts the auger, which corresponds to the positioning hole. The recessed groove is used to accommodate the nut of the screw.

[0013] Optionally, the settling tank is equipped with a filler plug.

[0014] Optionally, a magnetic block is embedded in the side of the adjusting sleeve body that is used to contact the auger.

[0015] Optionally, the adjusting sleeve includes an air valve, and the side of the adjusting sleeve body that contacts the auger is provided with a vacuum groove. The adjusting sleeve body is provided with an air extraction channel extending to the surface for contacting the material, and the air valve is installed in the air extraction channel.

[0016] Optionally, the air valve is embedded in the air extraction channel, and the opening of the air extraction channel is fitted with a filler plug.

[0017] On the other hand, a screw conveyor is provided, including an auger and the aforementioned adjusting sleeve, the adjusting sleeve being fitted onto the auger along the extending direction of the helical blades.

[0018] Optionally, the auger is fitted with two adjusting sleeves, which respectively contact the two sides of the spiral blade.

[0019] Optionally, the adjusting sleeve is glued and fixed to the auger.

[0020] On the other hand, a seeding machine is provided, including the aforementioned screw conveyor.

[0021] The beneficial effects of this application are as follows: This invention provides an adjusting sleeve for adjusting the output of an auger. It is a spirally extending strip that can be wound around the auger along the extension direction of the spiral blades of the auger, thereby reducing the size of the conveying space formed between the auger and the conveying pipe. The adjusting method of the adjusting sleeve based on this solution does not depend on the speed adjustment of the motor, thus widening the adjustable range of the spreading speed and further reducing the minimum conveying speed threshold of the auger to meet the user's lower conveying speed requirements. Attached Figure Description

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the adjusting sleeve described in this application;

[0024] Figure 2 for Figure 1 An axial sectional view of the structure shown.

[0025] Figure 3 In order to combine Figure 1 A schematic diagram of the structure of the screw conveyor with the adjusting sleeve shown;

[0026] Figure 4 for Figure 3 An axial sectional view of the structure shown.

[0027] Figure 5 for Figure 3 Exploded view of the structure shown;

[0028] Figure 6 This is a schematic diagram of another embodiment of the adjusting sleeve described in this application;

[0029] Figure 7 for Figure 6 An axial sectional view of the structure shown.

[0030] Figure 8 This is a schematic diagram of another embodiment of the adjusting sleeve described in this application;

[0031] Figure 9 for Figure 8 An axial sectional view of the structure shown.

[0032] Figure 10 for Figure 8 An exploded view of the structure shown.

[0033] Figure 11 This is a schematic diagram of another embodiment of the adjusting sleeve described in this application.

[0034] Figure 12 for Figure 11An axial sectional view of the structure shown.

[0035] Figure 13 for Figure 12 A magnified view of region A in the middle.

[0036] In the picture:

[0037] 1. Adjusting sleeve; 11. First contact surface; 12. Second contact surface; 13. Material contact surface; 14. Vacuum tank; 15. Air valve; 16. Filler plug; 2. Screwdriver; 21. Rotating shaft; 22. Spiral blade. Detailed Implementation

[0038] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] Screw conveyors are commonly used in various material conveying equipment applications, especially for conveying granular materials. For example, in agricultural sowing and plant protection, seeding mechanisms are typically used to spread seeds and fertilizers. Specifically, a seeding mechanism includes a hopper, a conveying pipe, a motor, and an screw. The hopper is installed above the conveying pipe, and the screw is rotatably installed inside the conveying pipe, with one end extending out of the pipe and connected to the motor. Driven by the motor, the screw uses its rotating spiral blades to continuously push the material in the conveying pipe out of the outlet at the end of the pipe, while the material in the hopper continuously replenishes the conveying pipe, thus achieving uniform spreading.

[0042] In a spreading mechanism using an auger to convey materials, the material conveying speed is affected by the rotational speed of the auger and the size of the conveying space formed between the auger and the conveying pipe. Since the size of the conveying space between the auger and the conveying pipe is fixed after they leave the factory, in current operations, when the material conveying speed needs to be adjusted, the operator can only do so by adjusting the motor speed. However, the adjustable range of the motor speed is limited, meaning the minimum spreading speed in the spreading mechanism is finite. During the sowing process, when it is necessary to reduce the sowing density, a slower spreading speed is required. When the required spreading speed is lower than the minimum spreading speed threshold of the existing spreading mechanism, the current spreading mechanism cannot meet the demand.

[0043] To overcome the above technical problems, this embodiment provides an adjusting sleeve for adjusting the discharge volume of the auger. It can adjust the conveying speed of the auger 2 by adjusting the size of the conveying space of the auger 2, so as to meet the use requirements of lower spreading discharge speed in the spreading mechanism.

[0044] The auger 2 structure includes a rotating shaft 21 and helical blades 22 spirally wound around the circumference of the rotating shaft 21. During use, the auger 2 is installed in a conveying cylinder, the inner diameter of which matches the outer diameter of the helical blades 22, thus forming a conveying space between the helical blades 22, the conveying cylinder, and the rotating shaft 21. Specifically, the size of the conveying space of the auger 2 is related to the pitch of the helical blades 22, the diameter of the rotating shaft 21, and the inner diameter of the conveying cylinder. During operation, at the same rotational speed, the larger the conveying space of the auger 2, the faster its conveying speed; conversely, the smaller the conveying space of the auger 2, the slower its conveying speed.

[0045] Reference Figure 1-13 The adjusting sleeve 1 in this embodiment includes an adjusting sleeve body, which is a spirally extending strip that can be wound around the auger 2 along the extending direction of the spiral blades 22 of the auger 2 to adjust the size of the material conveying space of the auger 2.

[0046] The specific adjustment principle is as follows: Traditional auger 2 has fixed dimensions for its shaft 21, spiral blades 22, and pitch after leaving the factory, making further adjustment impossible. Therefore, the material conveying space of the auger 2 itself is also fixed. In this design, the adjusting sleeve 1 is a spirally extending strip that can be wound around the auger 2 along the extension direction of the spiral blades 22. The adjusting sleeve 1 wound around the auger 2 occupies a certain area of ​​the original material conveying space of the auger 2, thus reducing the material conveying space on the adjusted auger 2. Therefore, at the same rotational speed as before, the conveying speed of the adjusted auger 2 is slower.

[0047] It should be noted that the adjusting sleeve 1 in this design is spiral-shaped. To avoid interfering with the normal operation of the auger 2, the outer diameter of the spiral adjusting sleeve 1 cannot exceed the outer diameter of the spiral blade 22, so that the spiral blade 22 can be properly installed into the original feed cylinder. For easy winding, the inner diameter of the spiral adjusting sleeve 1 should theoretically not be smaller than the outer diameter of the rotating shaft 21. However, when the adjusting sleeve 1 is made of a flexible material with a certain elasticity and deformation capacity (such as rubber, silicone, or flexible plastic), the inner diameter of the adjusting sleeve 1 can be slightly smaller than the outer diameter of the rotating shaft 21. In this case, the adjusting sleeve 1 wound on the auger 2 can just produce a certain amount of plastic deformation, and the retraction capacity of the adjusting sleeve 1 itself can just be fastened to the auger 2, improving the reliability of the connection between the adjusting sleeve 1 and the auger 2.

[0048] In summary, the adjusting sleeve for adjusting the auger output in this embodiment is a spirally extending strip that can be wound around the auger 2 along the extending direction of the spiral blades 22, thereby reducing the size of the conveying space formed between the auger 2 and the conveying pipe. The adjustment method of the adjusting sleeve 1 in this solution does not rely on the motor speed adjustment, thus widening the adjustable range of the spreading speed and further reducing the minimum conveying speed threshold of the auger 2 to meet users' lower conveying speed requirements. Importantly, adjusting the conveying speed of the auger 2 using the adjusting sleeve 1 in this embodiment can be achieved without changing the original auger 2 and conveying pipe, offering the advantage of low modification cost. Moreover, the modification is reversible; when it is no longer necessary to reduce the conveying space, the adjusting sleeve 1 can be directly removed.

[0049] In one embodiment, the adjusting sleeve body includes a first contact surface 11 and a second contact surface 12. The first contact surface 11 is used to contact the surface of the spiral blade 22, and the second contact surface 12 is used to contact the surface of the shaft 21 of the auger 2.

[0050] After installation, the second contact surface 12 of the adjusting sleeve 1 can contact the surface of the rotating shaft 21, meaning the adjusting sleeve 1 is tightly wound around the rotating shaft 21. This prevents the adjusting sleeve 1 from shifting and wobbling in the radial direction due to gaps between it and the rotating shaft 21, and also prevents material from getting stuck and unable to be discharged. Similarly, the first contact surface 11 of the adjusting sleeve 1 contacts the surface of the spiral blade 22, allowing the spiral blade 22 to support and restrict the axial movement of the adjusting sleeve 1, improving its stability and again preventing material from getting stuck due to gaps between it and the spiral blade 22. In summary, after installation, the adjusting sleeve 1 of this embodiment simultaneously contacts both the spiral blade 22 and the rotating shaft 21, achieving a dual fixing effect and enhancing the connection strength between the adjusting sleeve 1 and the auger 2.

[0051] The first contact surface 11 can be one or two, depending on the specific situation.

[0052] In one embodiment, referring to 1-5, there is one first contact surface 11, and the main body of the adjusting sleeve further includes a material contact surface 13 connected between the first contact surface 11 and the second contact surface 12, wherein the material contact surface 13 is an inclined surface.

[0053] The first contact surface 11 is provided, meaning that the installed adjusting sleeve 1 only contacts one surface of the spiral blade 22. In this case, to ensure that the spiral blade 22 can be supported by the adjusting sleeve 1 in the axial direction, preferably, the first contact surface 11 of the adjusting sleeve 1 contacts the side of the spiral blade 22 facing away from the discharge side. Specifically, the discharge direction of the auger 2 is from left to right, that is, the discharge side is located on the right side, and the rotating spiral blade 22 pushes the material from left to right. At this time, the first contact surface 11 of the installed adjusting sleeve 1 should contact the left side of the spiral blade 22, so that the pushed material can provide a thrust from left to right to push against the adjusting sleeve 1, so that the adjusting sleeve 1 is further pressed tightly against the spiral blade 22.

[0054] When the adjusting sleeve 1 only contacts one surface of the spiral blade 22, setting the material contact surface on it for contacting the material as an inclined surface can avoid the problem of material jamming caused by a small gap forming between the adjusting sleeve 1 and the other side of the spiral blade 22.

[0055] In one embodiment, reference is made to Figure 6-7 The first contact surface 11 has two surfaces, which are respectively used to contact the two sides of the spiral blade 22.

[0056] In this embodiment, the adjusting sleeve 1 has two first contact surfaces 11 for contacting the helical blade 22. In other words, after assembly, the two first contact surfaces 11 of the adjusting sleeve 1 can respectively abut against the two sides of the helical blade 22. Therefore, the axial movement freedom of the adjusting sleeve 1 can be completely restricted by the helical blade 22, improving the reliability of the adjusting sleeve 1 installation. Moreover, there is no gap between the adjusting sleeve 1 and the helical blade 22, thus avoiding the problem of material jamming due to the gap between them.

[0057] In one embodiment, the adjusting sleeve body is provided with a recess corresponding to the anti-jamming notch on the spiral blade 22.

[0058] Specifically, in spreaders, material jamming often occurs at the connection point between the hopper and the conveying pipe. Therefore, some existing augers 2 have an anti-jamming notch on the outer edge of the spiral blade 22 to address this issue. In this design, the adjusting sleeve 1 has a corresponding recess on the anti-jamming notch of the spiral blade 22, which avoids affecting the functionality of the anti-jamming notch, allowing the auger 2 with the adjusting sleeve 1 to also have an anti-jamming function.

[0059] In one embodiment, the adjusting sleeve body is provided with a plurality of positioning holes spaced apart along its own spiral direction, the positioning holes allowing screws to pass through to fix the adjusting sleeve body to the auger 2.

[0060] Specifically, before installing the adjusting sleeve 1, threaded holes need to be pre-drilled at the positions corresponding to the positioning holes on the auger 2. After the adjusting sleeve 1 is put on the auger 2, the positioning holes and threaded holes are aligned. Then, screws are inserted into each positioning hole and tightened.

[0061] The adjusting sleeve 1 is fixed to the auger 2 by screws passing through the positioning holes, achieving mechanical fixation. Compared with fixing methods that rely solely on friction or material elasticity, this method is more robust and reliable, maintaining a stable connection between the adjusting sleeve 1 and the auger 2 even under high-speed rotation or significant external force. The design of the positioning holes and screws makes the installation and maintenance of the adjusting sleeve 1 simpler and faster; when it is necessary to disassemble or replace the adjusting sleeve 1, the screws can be removed directly.

[0062] In one embodiment, the adjusting sleeve body has a recessed groove on the side facing away from the rotating shaft 21 that is used to contact the auger 2, which corresponds to the positioning hole. The recessed groove is used to accommodate the nut of the screw.

[0063] The recessed groove design allows the screw nut to be embedded in the adjusting sleeve 1, preventing the nut from protruding and damaging the flatness of the surface of the adjusting sleeve 1 after installation. This improves the smoothness of material feeding, avoids the problem of protruding nuts hindering the material's progress, and prevents the nut from being worn down by friction with the material over a long period of time.

[0064] In one embodiment, the adjusting sleeve 1 is fitted with a filling plug 16 in the sink.

[0065] Specifically, after fixing the adjusting sleeve 1 with screws, filler plugs 16 are inserted into each settling tank position. The filler plugs 16 can prevent the nuts from directly contacting the material, thus protecting the nuts. At the same time, after installation, the surface of the filler plugs 16 can be flush with the surface of the adjusting sleeve 1, preventing the accumulation of material powder in the settling tank and improving the smoothness of material movement along the surface of the adjusting sleeve 1.

[0066] In one embodiment, a magnetic block is embedded in the side of the adjusting sleeve body that is used to contact the auger 2.

[0067] This method is suitable for cases where the auger 2 is made of iron. The magnetic block uses magnetic force to tightly attract the adjusting sleeve 1 to the auger 2. This non-mechanical connection method can provide additional stability in some cases, reduce the risk of the adjusting sleeve 1 loosening and falling off due to vibration, and ensure that the adjusting sleeve 1 always stays in the correct position.

[0068] In one embodiment, reference is made to Figure 11-13 The adjusting sleeve 1 and the air valve 15 are provided. The side of the adjusting sleeve body that is used to contact the auger 2 is provided with a vacuum groove 14. The adjusting sleeve body is provided with an air extraction channel that extends to the surface for contacting the material. The air valve 15 is installed in the air extraction channel.

[0069] Specifically, a vacuum groove 14 is provided on the side of the adjusting sleeve body that contacts the auger 2. That is, after installation, a cavity is formed between the adjusting sleeve body and the auger 2. In this case, a vacuum device can be connected to an air valve 15, which can be opened to draw air from the cavity, creating a negative pressure. Under atmospheric pressure, the adjusting sleeve 1 can be tightly fitted onto the auger 2, preventing movement of the auger 2 during use. When it is necessary to remove the adjusting sleeve 1, simply open the air valve 15 to allow air to enter the vacuum groove 14, and the adjusting sleeve 1 can be easily removed.

[0070] The adjusting sleeve 1 is fixed to the auger 2 by vacuum adsorption. No drilling or gluing is required on the auger 2 during the whole process. It will not cause any damage to the original structure of the auger 2. Moreover, the reliability after installation is good and it can be repeatedly disassembled and used.

[0071] In one embodiment, the air valve 15 is embedded in the air extraction channel, and the opening of the air extraction channel is fitted with a filler plug 16.

[0072] Specifically, after installation and completion of the suction fixation, a filler plug 16 is inserted into the opening of the suction channel. The filler plug 16 prevents the air valve 15 from directly contacting the material, providing protection for the air valve 15 and preventing it from being blocked by material powder. At the same time, after installation, the surface of the filler plug 16 can be flush with the surface of the adjusting sleeve 1, preventing the accumulation of material powder in the suction channel and improving the smoothness of material movement along the surface of the adjusting sleeve 1.

[0073] On the other hand, this embodiment also provides a screw conveyor, including an auger 2 and the aforementioned adjusting sleeve 1, wherein the adjusting sleeve 1 is sleeved on the auger 2 along the extending direction of the helical blade 22.

[0074] Based on the above-mentioned adjusting sleeve 1, without replacing the original motor or changing the structure of the original auger 2, the screw conveyor of this embodiment can achieve a lower material conveying speed, meeting more user needs.

[0075] In one embodiment, reference is made to Figure 8-10 The auger 2 is fitted with two adjusting sleeves 1, which respectively contact the two sides of the spiral blade 22.

[0076] Specifically, by setting two adjusting sleeves 1 to contact the two sides of the spiral blade 22 respectively, the reliability of the installation of the two adjusting sleeves 1 can be ensured simultaneously. At the same time, the size of the adjusting sleeves 1 can be designed to be smaller, and one or two adjusting sleeves 1 can be freely selected to be installed according to the adjustment requirements.

[0077] Preferably, the surfaces of the two adjusting sleeves 1 facing each other are beveled, which can avoid the formation of narrow and deep gaps between the two adjusting sleeves 1 and the problem of material jamming.

[0078] In one embodiment, the adjusting sleeve 1 is glued and fixed to the auger 2.

[0079] The adjusting sleeve 1 is fixed to the auger 2 by adhesive, which has the advantages of simple fixing and good reliability.

[0080] Preferably, to facilitate repeated disassembly and assembly, hot melt adhesive is used to fix the adjusting sleeve 1 to the auger 2. When it is necessary to remove the adjusting sleeve 1, it is only necessary to heat it to melt the adhesive.

[0081] On the other hand, a seeding machine is provided, including the aforementioned screw conveyor.

[0082] Based on the above screw conveyor, the sowing in this embodiment can achieve a lower material conveying speed without replacing the original motor or changing the original auger 2 structure, thus meeting more user needs.

[0083] In practical applications, when users require a lower spreading density, and the original motor of the spreader is adjusted to the lowest speed but still cannot meet the requirement, the adjusting sleeve 1 can be wound around the auger 2 and fixed, which will allow the spreader to have a slower spreading speed.

[0084] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0085] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification 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.

[0087] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An adjusting sleeve for adjusting the discharge rate of an auger, characterized in that, The device includes an adjusting sleeve body, which is a spirally extending strip that can be wound around the auger (2) along the extending direction of the spiral blades (22) of the auger (2) to adjust the size of the material conveying space of the auger (2); the adjusting sleeve body includes a first contact surface (11) and a second contact surface (12), the first contact surface (11) is used to contact the surface of the spiral blades (22), and the second contact surface (12) is used to contact the surface of the rotating shaft (21) of the auger (2).

2. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 1, characterized in that, The first contact surface (11) has one, and the main body of the adjusting sleeve also includes a material contact surface (13) connecting the first contact surface (11) and the second contact surface (12), wherein the material contact surface (13) is an inclined surface.

3. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 1, characterized in that, The first contact surface (11) has two surfaces, which are respectively used to contact the two sides of the spiral blade (22).

4. The adjusting sleeve for adjusting the auger discharge rate according to claim 1, characterized in that, The main body of the adjusting sleeve is provided with a recess corresponding to the anti-jamming notch on the spiral blade (22).

5. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 1, characterized in that, The adjusting sleeve body is provided with a number of positioning holes at intervals along its own spiral direction, the positioning holes allowing screws to pass through to fix the adjusting sleeve body to the auger (2).

6. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 5, characterized in that, The adjusting sleeve body has a recessed groove on the side facing away from the shaft (21) for contacting the auger (2) that corresponds to the positioning hole. The recessed groove is used to accommodate the nut of the screw.

7. The adjusting sleeve for adjusting the auger discharge rate according to claim 6, characterized in that, The settling tank is equipped with a filling plug (16).

8. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 1, characterized in that, The side of the adjusting sleeve body that is used to contact the auger (2) has a magnetic block embedded in it.

9. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 1, characterized in that, Includes an air valve (15), the side of the adjusting sleeve body that is used to contact the auger (2) is provided with a vacuum groove (14), the adjusting sleeve body is provided with an air extraction channel extending to the surface for contacting the material, and the air valve (15) is installed in the air extraction channel.

10. The adjusting sleeve for adjusting the discharge rate of the auger according to claim 9, characterized in that, The air valve (15) is embedded in the air extraction channel, and the opening of the air extraction channel is fitted with a filler plug (16).

11. A screw conveyor, characterized in that, Includes an auger (2) and an adjusting sleeve (1) as described in any one of claims 1-10, wherein the adjusting sleeve (1) is fitted onto the auger (2) along the extending direction of the spiral blade (22).

12. The screw conveyor according to claim 11, characterized in that, Two adjusting sleeves (1) are fitted on the auger (2), and the two adjusting sleeves (1) respectively contact the two sides of the spiral blade (22).

13. The screw conveyor according to claim 11, characterized in that, The adjusting sleeve (1) is glued and fixed to the auger (2).

14. A seeding machine, characterized in that, Includes the screw conveyor as described in any one of claims 11-13.

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