Feeding mechanism and bottle cap detection equipment

Abstract

The invention discloses a feeding mechanism and bottle cap detection equipment, and the feeding mechanism comprises a rack; the material receiving part is arranged on the rack, and the material receiving part is used for being in butt joint with the discharging end of an external feeding mechanism so as to receive bottle caps fed by the discharging end of the external feeding mechanism; the upper-layer negative-pressure conveying belt assembly is arranged on the rack and extends in the feeding direction, the upper-layer negative-pressure conveying belt assembly and the material receiving part are arranged in an up-down staggered mode, and the end, close to the material receiving part, of the upper-layer negative-pressure conveying belt assembly is located over the material receiving part; the upper-layer negative pressure conveying belt assembly is used for adsorbing the bottle caps received by the material receiving part and conveying the adsorbed bottle caps in the feeding direction; wherein the material receiving part is provided with an air blowing opening which is used for being connected with a positive pressure air source and blowing air to the bottom of the bottle cap received by the material receiving part. By means of the structure, the response speed of transferring the bottle caps to the upper-layer negative pressure conveying belt assembly can be increased, and meanwhile the upper-layer negative pressure conveying belt assembly can suck up the bottle caps more stably.

Description

Technical Field

[0001] The present application relates to the technical field of bottle cap detection, and in particular to a feeding mechanism and a bottle cap detection device. Background Art

[0002] Bottle caps are a common filling accessory, used to seal the filling ports of filling containers (glass bottles, plastic bottles, etc. filled with liquids). Before assembling the bottle caps at the filling ports of the filling containers, the bottle caps need to be inspected to ensure that the bottle caps entering the assembly process meet the requirements in terms of appearance, size, printing, labeling, etc.

[0003] In the related art, in order to detect the bottom area of ​​the bottle caps in the conveying state, it is necessary to cooperate in feeding through the upper layer negative pressure conveyor belt assembly and the lower layer negative pressure conveyor belt assembly that are partially overlapped and staggered up and down, wherein the upper layer negative pressure conveyor belt assembly absorbs the bottle caps conveyed by the lower layer negative pressure conveyor belt assembly by vacuum adsorption and continues to convey the absorbed bottle caps, so that the bottom area of ​​the bottle caps is exposed, so that the bottom area of ​​the bottle caps can be detected in conjunction with the visual detection technology. However, in the above-mentioned feeding process, the upper layer negative pressure conveyor belt assembly only relies on its own vacuum adsorption force to absorb the bottle caps conveyed by the lower layer negative pressure conveyor belt assembly, so that the response speed of the bottle caps transferred from the lower layer negative pressure conveyor belt assembly to the upper layer negative pressure conveyor belt assembly is slow, and it is difficult for the upper layer negative pressure conveyor belt assembly to stably absorb the bottle caps conveyed by the lower layer negative pressure conveyor belt assembly. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a feeding mechanism, which is conducive to improving the response speed of bottle caps being transferred to the upper negative pressure conveyor belt assembly, and is also conducive to the upper negative pressure conveyor belt assembly sucking up the bottle caps more stably.

[0005] The present application also proposes a bottle cap detection device having the above-mentioned feeding mechanism.

[0006] According to the first aspect of the present application, the feeding mechanism comprises: a frame; a receiving portion, which is arranged on the frame, and the receiving portion is used to dock with the discharge end of the external loading mechanism to receive the bottle caps fed by the discharge end of the external loading mechanism; an upper negative pressure conveyor belt assembly, which is arranged on the frame and extends along the feeding direction, and the upper negative pressure conveyor belt assembly is staggered with the receiving portion up and down, and one end of the upper negative pressure conveyor belt assembly close to the receiving portion is located directly above the receiving portion, and the upper negative pressure conveyor belt assembly is used to absorb the bottle caps received by the receiving portion and convey the absorbed bottle caps along the feeding direction; wherein the receiving portion is provided with a blowing port for connecting to a positive pressure air source and blowing air to the bottom of the bottle caps received by the receiving portion.

[0007] According to the feeding mechanism of the embodiment of the present application, at least the following beneficial effects are achieved: when in use, the bottle cap fed by the discharge end of the external feeding mechanism is received by the receiving portion, wherein one end of the upper negative pressure conveyor belt assembly close to the receiving portion is located directly above the receiving portion, so that the upper negative pressure conveyor belt assembly can absorb the bottle cap received by the receiving portion and convey the absorbed bottle cap along the feeding direction, so that the bottom area of ​​the bottle cap is exposed, so that the bottom area of ​​the bottle cap can be detected in cooperation with the visual detection technology. Further, the receiving portion is provided with a blowing port for connecting to a positive pressure air source and blowing air to the bottom of the bottle cap received by the receiving portion, and while the upper negative pressure conveyor belt assembly absorbs the bottle cap received by the receiving portion, the positive pressure air source blows air to the bottom of the bottle cap received by the receiving portion through the blowing port, so as to assist the bottle cap to break away from the support of the receiving portion and be absorbed by the upper negative pressure conveyor belt assembly. The above structure is conducive to improving the response speed of the bottle cap being transferred to the upper negative pressure conveyor belt assembly, and is also conducive to the upper negative pressure conveyor belt assembly sucking up the bottle cap more stably.

[0008] According to some embodiments of the present application, the feeding mechanism also includes a negative pressure generating device, which has an air inlet end and an air outlet end, the air inlet end is connected to the upper negative pressure conveyor belt assembly through a pipeline, and the air outlet end is connected to the air port through a pipeline.

[0009] According to some embodiments of the present application, a regulating valve is provided on the pipeline between the air outlet and the air port, and the regulating valve is used to adjust the air outlet volume of the air port.

[0010] According to some embodiments of the present application, the material receiving portion is provided with a limiting groove extending along the feeding direction and used to accommodate the bottle cap, the end of the limiting groove is an open structure, and the blowing port is located at the bottom of the limiting groove.

[0011] According to some embodiments of the present application, the feeding mechanism also includes a cap separating device, which includes two rotating wheels for clamping bottle caps and driving the clamped bottle caps to feed, the two rotating wheels are respectively arranged on both sides of the material receiving part, and the frame is provided with a first driving motor for driving the rotating wheels to rotate.

[0012] According to some embodiments of the present application, the feeding mechanism further includes a collecting hopper with an upward opening, the collecting hopper is arranged directly below the upper negative pressure conveyor belt assembly, and the collecting hopper is used to recover fallen bottle caps.

[0013] According to some embodiments of the present application, the upper negative pressure conveyor belt assembly includes a first bracket, a second drive motor, a roller and an endless conveyor belt, the first bracket is arranged on the frame and extends along the feeding direction, the rollers are arranged at both ends of the first bracket, the endless conveyor belt is wound around the outside of the first bracket, the second drive motor is arranged on the first bracket and is used to drive the endless conveyor belt to move, the interior of the first bracket is provided with a negative pressure chamber for connecting to a negative pressure gas source, and the endless conveyor belt is provided with adsorption holes that can be connected to the negative pressure chamber and used to adsorb bottle caps.

[0014] According to some embodiments of the present application, a height adjustment structure is provided on the frame corresponding to the upper negative pressure conveyor belt assembly, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly.

[0015] According to some embodiments of the present application, the height adjustment structure includes a second bracket, a movable connecting piece, a screw assembly and a driving piece, the second bracket is arranged on the frame, the movable connecting piece is connected to the second bracket movably up and down and is connected to the first bracket, the screw assembly is arranged between the second bracket and the movable connecting piece, and the driving piece is connected to the screw assembly and is used to drive the movable connecting piece to move up and down relative to the second bracket.

[0016] According to the bottle cap detection device of the second aspect embodiment of the present application, it includes the feeding mechanism according to the above-mentioned first aspect embodiment of the present application.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a structural schematic diagram of a bottle cap detection device according to an embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the partial structure of the material receiving part of the bottle cap detection device in one embodiment of the present application;

[0021] Figure 3 It is a schematic diagram of the gas path structure between the material receiving part, the upper negative pressure conveyor belt assembly and the negative pressure generating device in the bottle cap detection equipment of one embodiment of the present application;

[0022] Figure 4 yes Figure 2 A schematic diagram of another view of the structure shown;

[0023] Figure 5 It is a partial structural schematic diagram of a feeding mechanism in a bottle cap detection device according to an embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of an upper negative pressure conveyor belt assembly according to an embodiment of the present application;

[0025] Figure 7 yes Figure 6 A schematic cross-sectional view of the structure shown;

[0026] Figure 8 yes Figure 7 A partial enlarged schematic diagram in the middle.

[0027] Reference numerals:

[0028] Bottle cap a, frame 100, material receiving part 200, blowing port 210, limiting groove 220, upper negative pressure conveyor belt assembly 300, first bracket 310, negative pressure chamber 311, second drive motor 320, roller 330, endless conveyor belt 340, adsorption hole 341, negative pressure generating device 400, air inlet end 410, air outlet end 420, regulating valve 500, rotating wheel 610, first drive motor 620, collecting hopper 700, second bracket 810, guide column 811, movable connecting part 820, guide sleeve 821, screw rod assembly 830, driving part 840. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be understood that if orientation descriptions are involved, the orientations or positional relationships indicated, such as up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0031] In the description of this application, if the words "some", "greater than", "less than", "exceed", "above", "below", "within" etc. appear, "some" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number, and "above", "below", "within", etc. are understood to include the number.

[0032] In the description of this application, if the words "first", "second", etc. appear, they are only used to distinguish technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0034] Reference Figures 1 to 8 According to the embodiment of the present application, the feeding mechanism includes a frame 100, a material receiving portion 200 and an upper negative pressure conveyor belt assembly 300.

[0035] Specifically, the receiving portion 200 is arranged on the frame 100, and the receiving portion 200 is used to dock with the discharge end of the external feeding mechanism to receive the bottle cap a fed by the discharge end of the external feeding mechanism. The upper negative pressure conveyor belt assembly 300 is arranged on the frame 100 and extends along the feeding direction. The upper negative pressure conveyor belt assembly 300 and the receiving portion 200 are staggered up and down. One end of the upper negative pressure conveyor belt assembly 300 close to the receiving portion 200 is located directly above the receiving portion 200. The upper negative pressure conveyor belt assembly 300 is used to absorb the bottle cap a received by the receiving portion 200 and transport the absorbed bottle cap a along the feeding direction, wherein the receiving portion 200 is provided with a blowing port 210 for connecting to a positive pressure air source and blowing air to the bottom of the bottle cap a received by the receiving portion 200.

[0036] It should be noted that the above-mentioned feeding direction is the X direction in the drawings.

[0037] When in use, the bottle cap a fed by the discharge end of the external loading mechanism is received by the receiving portion 200, wherein one end of the upper negative pressure conveyor belt assembly 300 close to the receiving portion 200 is located directly above the receiving portion 200, so that the upper negative pressure conveyor belt assembly 300 can absorb the bottle cap a received by the receiving portion 200 and convey the absorbed bottle cap a along the feeding direction, so that the bottom area of ​​the bottle cap a is exposed, thereby being able to detect the bottom area of ​​the bottle cap a in cooperation with the visual inspection technology. Furthermore, the receiving portion 200 is provided with a blowing port 210 for connecting with a positive pressure air source and blowing air toward the bottom of the bottle cap a received by the receiving portion 200. When the upper negative pressure conveyor belt assembly 300 absorbs the bottle cap a received by the receiving portion 200, the positive pressure air source blows air toward the bottom of the bottle cap a received by the receiving portion 200 through the blowing port 210, so as to assist the bottle cap a to be separated from the support of the receiving portion 200 and be absorbed by the upper negative pressure conveyor belt assembly 300. The above structure is conducive to improving the response speed of the bottle cap a being transferred to the upper negative pressure conveyor belt assembly 300, and is also conducive to the upper negative pressure conveyor belt assembly 300 to absorb the bottle cap a more stably.

[0038] Reference Figure 3 In some embodiments, the feeding mechanism further includes a negative pressure generating device 400, which has an air inlet end 410 and an air outlet end 420. The air inlet end 410 of the negative pressure generating device 400 is connected to the upper negative pressure conveyor belt assembly 300 through a pipeline, and the air outlet end 420 of the negative pressure generating device 400 is connected to the air blowing port 210 through a pipeline. When in use, the air inlet end 410 of the negative pressure generating device 400 provides negative pressure for adsorbing the bottle cap a to the upper negative pressure conveyor belt assembly 300, and the air outlet end 420 of the negative pressure generating device 400 provides positive pressure for blowing up the bottle cap a to the air blowing port 210, thereby realizing the recycling of airflow, which is conducive to reducing energy consumption compared to the case of using independent negative pressure air source and positive pressure air source.

[0039] Specifically, the negative pressure generating device 400 is a negative pressure fan. Of course, the negative pressure generating device 400 may also be an air pump or an exhaust fan, which is not limited here.

[0040] Reference Figures 2 to 4 In some of the embodiments, a regulating valve 500 is provided on the pipeline between the air outlet 420 of the negative pressure generating device 400 and the air outlet 210, and the regulating valve 500 is used to adjust the air outlet volume of the air outlet 210 to adapt to the actual feeding requirements.

[0041] Reference Figure 2 and Figure 4 In some embodiments, the receiving portion 200 is provided with a limiting groove 220 extending along the feeding direction and used to accommodate the bottle cap a, which is beneficial to prevent the bottle cap a received by the receiving portion 200 from falling, wherein the end of the limiting groove 220 is an open structure to facilitate receiving the bottle cap a fed by the discharge end of the external feeding mechanism, and the blowing port 210 is located at the bottom of the limiting groove 220 to facilitate blowing toward the bottom of the bottle cap a received by the receiving portion 200.

[0042] Reference Figure 2 , Figure 4 and Figure 5 In some embodiments, the feeding mechanism further includes a capping device, which includes two rotating wheels 610 for clamping the bottle cap a and driving the clamped bottle cap a to feed, the two rotating wheels 610 are respectively arranged on both sides of the material receiving portion 200, and the frame 100 is provided with a first driving motor 620 for driving the rotating wheels 610 to rotate. When in use, the rotation speed of the first driving motor 620 is set so that the feeding speed of the bottle cap a clamped by the two rotating wheels 610 is less than the conveying speed of the upper negative pressure conveyor belt assembly 300, so that the bottle cap a that has been separated from the clamping of the rotating wheels 610 and is continuously conveyed by the upper negative pressure conveyor belt assembly 300 can be pulled away from the bottle cap a clamped by the two rotating wheels 610, so as to realize the function of capping.

[0043] Among them, by adjusting the rotation speed of the first driving motor 620, the distance between two adjacent bottle caps a can be changed to adapt to different feeding requirements.

[0044] Reference Figure 1 and Figure 5 In some embodiments, the feeding mechanism further includes a collecting hopper 700 with an upward opening, which is arranged directly below the upper negative pressure conveyor belt assembly 300, and the collecting hopper 700 is used to recover the fallen bottle caps a. When the bottle caps a conveyed by the upper negative pressure conveyor belt assembly 300 accidentally fall, they can be recovered by the collecting hopper 700.

[0045] Reference Figures 6 to 8 In some embodiments thereof, the upper negative pressure conveyor belt assembly 300 includes a first bracket 310, a second drive motor 320, a roller 330 and an endless conveyor belt 340. The first bracket 310 is arranged on the frame 100 and extends along the feeding direction. Rollers 330 are arranged at both ends of the first bracket 310. The endless conveyor belt 340 is wound around the outside of the first bracket 310. The second drive motor 320 is arranged on the first bracket 310 and is used to drive the endless conveyor belt 340 to move. A negative pressure chamber 311 for connecting to a negative pressure gas source is arranged inside the first bracket 310. The endless conveyor belt 340 is provided with an adsorption hole 341 that can be connected to the negative pressure chamber 311 and is used to adsorb bottle caps a. The structure is simple and easy to implement.

[0046] It should be noted that, in some embodiments, the output shaft of the second driving motor 320 is connected to one of the rollers 330 to drive the roller 330 to rotate, thereby driving the endless conveyor belt 340 to move.

[0047] It should be noted that in some other embodiments, a tensioning assembly is provided on the first bracket 310, and the tensioning assembly includes multiple tensioning rollers. The output shaft of the second drive motor 320 is connected to one of the tensioning rollers to drive the tensioning roller to rotate, and the annular conveyor belt 340 is wound around the tensioning roller so that the annular conveyor belt 340 can be driven to move when the tensioning roller rotates.

[0048] It should be noted that, in some of the embodiments, a height adjustment structure is provided on the frame 100 corresponding to the upper negative pressure conveyor belt assembly 300, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly 300, so as to adapt to bottle caps a of different heights.

[0049] Reference Figure 1 and Figure 5In some embodiments, the height adjustment structure includes a second bracket 810, a movable connecting member 820, a screw assembly 830 and a driving member 840. The second bracket 810 is arranged on the frame 100. The movable connecting member 820 is connected to the second bracket 810 and can be moved up and down and is connected to the first bracket 310. The screw assembly 830 is arranged between the second bracket 810 and the movable connecting member 820. The driving member 840 is connected to the screw assembly 830 and is used to drive the movable connecting member 820 to move up and down relative to the second bracket 810. Its structure is simple and easy to implement.

[0050] It should be noted that in some embodiments, at least two guide posts 811 are spaced apart on the second bracket 810 , and a guide sleeve 821 passing through the guide posts 811 is provided on the movable connecting member 820 , so that the movable connecting member 820 can move up and down relative to the second bracket 810 .

[0051] It should be noted that in some other embodiments, guide grooves are arranged at intervals on the second bracket 810, and a slider slidably connected to the guide grooves is arranged on the movable connecting member 820, so that the movable connecting member 820 can move up and down relative to the second bracket 810.

[0052] It should be noted that, in some of the embodiments, the nut of the screw assembly 830 is fixedly set on the second bracket 810, and the screw of the screw assembly 830 is connected to the movable connecting member 820. At this time, when the driving member 840 drives the screw of the screw assembly 830 to rotate, the nut of the screw assembly 830 is fixed to drive the screw of the screw assembly 830 to move up and down, thereby driving the movable connecting member 820 to move up and down relative to the second bracket 810, and then driving the first bracket 310 to move up and down relative to the second bracket 810 to adjust the height of the upper negative pressure conveyor belt assembly 300.

[0053] It should be noted that, in some other embodiments, the nut of the screw assembly 830 is fixedly arranged on the movable connecting member 820, and the screw of the screw assembly 830 is rotatably arranged between the second bracket 810 and the frame 100. At this time, when the driving member 840 drives the screw of the screw assembly 830 to rotate, the screw of the screw assembly 830 can only rotate to drive the nut of the screw assembly 830 to move up and down, thereby driving the movable connecting member 820 to move up and down relative to the second bracket 810, and then driving the first bracket 310 to move up and down relative to the second bracket 810 to adjust the height of the upper negative pressure conveyor belt assembly 300.

[0054] Specifically, the driving member 840 is a hand wheel. Of course, the driving member 840 may also be a motor, which is not limited here.

[0055] It should be noted that, in some other embodiments, the height of the upper negative pressure conveyor belt assembly 300 may also be adjusted by a linear drive structure such as an electric push rod, a pneumatic cylinder, or an oil cylinder, which is not limited here.

[0056] The bottle cap detection device according to the embodiment of the present application includes the above-mentioned feeding mechanism.

[0057] It can be understood that, since the bottle cap detection device of the embodiment of the present application includes the above-mentioned feeding mechanism, the bottle cap detection device of the embodiment of the present application has all the technical effects of the above-mentioned feeding mechanism.

[0058] In the description of this specification, if the description involves reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" and "some examples", it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A feeding mechanism, characterized in that: include: frame; A material receiving portion, disposed on the frame, and used to dock with the discharge end of the external feeding mechanism to receive the bottle caps fed by the discharge end of the external feeding mechanism; An upper negative pressure conveyor belt assembly is arranged on the frame and extends along the feeding direction. The upper negative pressure conveyor belt assembly and the material receiving portion are arranged in an offset manner up and down. One end of the upper negative pressure conveyor belt assembly close to the material receiving portion is located directly above the material receiving portion. The upper negative pressure conveyor belt assembly is used to absorb the bottle caps received by the material receiving portion and convey the absorbed bottle caps along the feeding direction. Wherein, the material receiving portion is provided with a blowing port for being connected to a positive pressure air source and blowing air toward the bottom of the bottle cap received by the material receiving portion.

2. The feeding mechanism according to claim 1, characterized in that: The feeding mechanism also includes a negative pressure generating device, which has an air inlet end and an air outlet end. The air inlet end is connected to the upper negative pressure conveyor belt assembly through a pipeline, and the air outlet end is connected to the air outlet through a pipeline.

3. The feeding mechanism according to claim 2, characterized in that: A regulating valve is arranged on the pipeline between the air outlet and the air port, and the regulating valve is used to adjust the air outlet volume of the air port.

4. The feeding mechanism according to claim 1, characterized in that: The material receiving portion is provided with a limiting groove extending along the feeding direction and used for accommodating the bottle cap, the end of the limiting groove is an open structure, and the blowing port is located at the bottom of the limiting groove.

5. The feeding mechanism according to claim 1, characterized in that: The feeding mechanism also includes a cap separating device, which includes two rotating wheels for clamping bottle caps and driving the clamped bottle caps to feed, the two rotating wheels are respectively arranged on both sides of the material receiving part, and the frame is provided with a first driving motor for driving the rotating wheels to rotate.

6. The feeding mechanism according to claim 1, characterized in that: The feeding mechanism also includes a collecting hopper with an upward opening, which is arranged directly below the upper negative pressure conveyor belt assembly and is used to recover fallen bottle caps.

7. The feeding mechanism according to claim 1, characterized in that: The upper negative pressure conveyor belt assembly includes a first bracket, a second drive motor, a roller and an endless conveyor belt. The first bracket is arranged on the frame and extends along the feeding direction. The rollers are arranged at both ends of the first bracket. The endless conveyor belt is wound around the outside of the first bracket. The second drive motor is arranged on the first bracket and is used to drive the endless conveyor belt to move. A negative pressure chamber connected to a negative pressure gas source is arranged inside the first bracket, and adsorption holes that can be connected to the negative pressure chamber and used to adsorb bottle caps are arranged on the endless conveyor belt.

8. The feeding mechanism according to claim 7, characterized in that: A height adjustment structure is provided on the frame corresponding to the upper negative pressure conveyor belt assembly, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly.

9. The feeding mechanism according to claim 8, characterized in that: The height adjustment structure includes a second bracket, a movable connecting piece, a screw assembly and a driving piece, the second bracket is arranged on the frame, the movable connecting piece is connected to the second bracket and is connected to the first bracket so as to be movable up and down, the screw assembly is arranged between the second bracket and the movable connecting piece, and the driving piece is connected to the screw assembly and is used to drive the movable connecting piece to move up and down relative to the second bracket.

10. A bottle cap detection device, characterized in that: Comprising a feeding mechanism as described in any one of claims 1 to 9.

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