Cover falling structure provided with protective cover

Abstract

The utility model discloses a cap falling structure with a protective cover, the cap falling structure comprises a falling cap storage channel, a cap falling base, a cap separating and conveying mechanism and the protective cover, the bottom end of the falling cap storage channel is communicated with the top end of the cap falling base, and the cap separating and conveying mechanism is installed inside the cap falling base. The protective cover is detachably installed on one side of the cover falling base, the cover separating and conveying mechanism comprises three cover conveying and separating assemblies and a cover conveying driving assembly, the three cover conveying and separating assemblies are circumferentially and evenly distributed in the cover falling base at intervals, and the three cover conveying and separating assemblies are further located below the cover falling and storing channel; and the cap conveying driving assembly is in transmission connection with the three cap conveying and distributing assemblies. The cover falling structure is provided with the protective cover, the protective cover is detachably installed on one side of the cover falling base, and whether the cover falling into the cover falling base is clamped or not is observed by detaching the protective cover.

Description

Technical Field

[0001] The utility model belongs to the technical field of can making, and in particular relates to a drop cover structure provided with a protective cover. Background Art

[0002] Cans, tea, spray cans and other cans need to be sealed and packaged with can covers. Can covers are widely used in various packaging industries such as cans, tea, spray cans, etc. With the continuous development of technology and the improvement of living standards, the demand for can covers is increasing. Existing can covers are usually made of sheet metal and formed by a multi-die punching machine. The can covers are then transported to the glue injection machine for glue injection by a conveyor belt. The multi-die punching machine has a very fast punching speed and continuously outputs the covers, while the glue injection speed of the glue injection machine is much slower than that of the punching machine. This often causes the can covers on the conveyor belt to be blocked during transportation. When the blockage occurs, the can covers will be stacked on the conveying channel, and the multi-die punching machine has to be shut down, which seriously affects the production efficiency of the can covers.

[0003] Existing can manufacturers usually set up a temporary storage tank cover structure. For example, the Chinese patent "A spray can tank cover gluing device" with the Chinese publication number CN 207971037U discloses a spray can tank cover gluing device, including a workbench, on which slide rails for limiting the tank cover are relatively arranged, a slideway is formed between the two slide rails, a cap storage mechanism and a gluing mechanism are arranged on the slideway, and a cap feeding mechanism for moving the tank cover from the cap storage mechanism to the gluing mechanism is also provided on the slideway. The gluing mechanism includes a glue injector, and a rotating assembly for driving the tank cover to rotate so that the glue injector glues the circumferential edge of the tank cover is provided on one side of the glue injector. The said cap storage mechanism includes a cap storage seat provided at one end of the slideway, and the said cap storage seat is provided with a cap storage seat. A sliding cover slot is defined along the length of the slideway for the slideway to pass through. A cover drop-off opening is defined at the top of the cover storage seat, corresponding to the slideway. A cover storage rack for stacking can lids is provided on the cover storage seat, corresponding to the cover drop-off opening. The cover feeding mechanism includes a cover feeding rod, each slidably connected to the two slide rails. A cover feeding cylinder, electrically connected to the controller, is provided within the cover storage seat. The piston rod of the cover feeding cylinder is connected to a connecting plate. One end of each of the two cover feeding rods extends into the sliding cover slot and is connected to the connecting plate. Multiple wedge-shaped blocks are spaced along the length of the cover feeding rods on the side of the two cover feeding rods closest to the slideway, with the small ends of the wedge blocks facing the cover storage seat. Although this solution provides a cover storage mechanism for temporarily storing can lids, the cover drop storage structure of this solution has the following shortcomings:

[0004] 1) The storage cover seat is designed as an integrated structure, and the four sides of the storage cover seat are non-detachable. If the tank cover falling into the storage cover seat is stuck or blocked, the staff cannot understand it in time and cannot solve the blocking problem in time, resulting in the aggravation of the tank cover blocking inside the storage cover seat, which not only affects the glue injection processing of the tank cover, but also damages the tank cover, causing the tank cover to be scrapped, increasing the difficulty of subsequent manual processing of the blocked cover, increasing labor input, and increasing production cost investment;

[0005] 2) The existing cover storage mechanism and cover delivery mechanism can only deliver the can cover to the linear injection cover structure. Some injection cover structures use a turntable cover. The existing cover storage mechanism and cover delivery mechanism are not suitable for turntable loading processing and their scope of use is relatively limited. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the utility model provides a protective cover that can be detachably installed on one side of the drop-cover base, the drop-cover base can be removed, and it is convenient to promptly check whether the cover inside the drop-cover base is stuck. Three groups of cover feeding and sub-cover assemblies are provided, which can improve the stability of the cover falling on the cover feeding and sub-cover assemblies, and avoid the cover from tilting when falling into the drop-cover base, unstable cover feeding and discharging, etc.

[0007] In order to solve the above technical problems, the utility model provides a falling cover structure provided with a protective cover, the falling cover structure comprising a falling cover storage channel, a falling cover base, a covering separation and feeding mechanism, and a protective cover, the bottom end of the falling cover storage channel is connected to the top of the falling cover base, the covering separation and feeding mechanism is installed inside the falling cover base, and the protective cover is detachably installed on one side of the falling cover base, the covering separation and feeding mechanism comprises three groups of covering feeding and covering assemblies and a covering feeding drive assembly, the three groups of covering feeding and covering assemblies are uniformly distributed in a circular manner inside the falling cover base, the three groups of covering feeding and covering assemblies are also located below the falling cover storage channel, and the covering feeding drive assembly is transmission-connected to the three groups of covering feeding and covering assemblies.

[0008] Furthermore, an observation port is provided on one side of the drop cover base, and a first threaded hole is provided on one side of the drop cover base, the first threaded hole being located outside the observation port. The protective cover is provided with a second threaded hole and a connecting screw that cooperates with the first threaded hole of the drop cover base. The protective cover is positioned over the observation port, and the connecting screw passes through the second threaded hole of the protective cover and the first threaded hole of the drop cover base to removably attach the protective cover to the side of the drop cover base. The provision of the connecting screw facilitates the removable attachment of the protective cover to the side of the drop cover base, making it easy to remove the protective cover and observe the drop cover condition inside the drop cover base through the observation port.

[0009] Furthermore, each set of cover feeding and separating components includes a cover feeding and separating wheel and a cover separating knife, the cover separating knife is installed on the top of the cover feeding and separating wheel, the outer wall surface of the cover feeding and separating wheel is provided with a cover guide track, and the cover guide track is distributed from top to bottom along the outer wall surface of the cover feeding and separating wheel.

[0010] Furthermore, a blade for cutting into the caps dropped from the cap dropping and storing channel is formed on one side edge of the cap separating knife, and a cap dropping notch for facilitating the caps to drop is formed on the top edge of the cap feeding and separating wheel.

[0011] Furthermore, the cap feeding drive assembly includes a cap feeding rotating element and a rotation driving element, one end of the cap feeding rotating element is transmission connected to the cap feeding sub-cap assembly, and the other end of the cap feeding rotating element is transmission connected to the rotation driving element.

[0012] Furthermore, the cover feeding rotating element includes a cover feeding wheel shaft, a cover feeding synchronous wheel, a cover feeding synchronous belt, a transmission synchronous wheel, and a transfer active shaft, the same number as the cover feeding and separating wheel. The cover feeding synchronous wheel is located above the cover feeding and separating wheel, and the cover feeding wheel shaft passes through the cover feeding synchronous wheel and the middle part of the cover feeding and separating wheel from top to bottom in sequence. The transmission synchronous wheel is located on one side of the cover feeding synchronous wheel, the upper end of the transfer active shaft is connected to the middle part of the transmission synchronous wheel, and the lower end of the transfer active shaft is connected to the rotating drive element, and the cover feeding synchronous belt is sleeved on the cover feeding synchronous wheel and the transmission synchronous wheel above the cover feeding and separating wheel.

[0013] Furthermore, the cover feeding drive assembly includes a cam divider, a first transmission member, a second transmission member, and a synchronous tensioning assembly. The cover feeding synchronous belt of the cover feeding rotating element is also sleeved on the outside of the transmission synchronous wheel. The lower end of the transfer driving shaft is connected to the first transmission member, and the first transmission member is engaged with the second transmission member. One end of the synchronous tensioning assembly is transmission-connected to the second transmission member, and the other end of the synchronous tensioning assembly is transmission-connected to one end of the input force shaft of the cam divider.

[0014] Furthermore, the cover feeding drive assembly includes a driving motor, a driving active wheel, a driving driven wheel, and a transmission synchronous belt. The motor shaft of the driving motor is connected to the driving active wheel, and the driving driven wheel is connected to the other end of the input force shaft of the cam divider. The transmission synchronous belt is sleeved on the driving active wheel and the driving driven wheel, and the driving driven wheel is connected to the driving active wheel through the transmission synchronous belt.

[0015] The beneficial effects of the present invention are:

[0016] The present invention relates to a drop-lid structure comprising a drop-lid storage channel, a drop-lid base, a lid-separating and feeding mechanism, and a protective cover. The bottom end of the drop-lid storage channel is connected to the top end of the drop-lid base, the lid-separating and feeding mechanism is installed inside the drop-lid base, and the protective cover is detachably mounted on one side of the drop-lid base. The lid-separating and feeding mechanism comprises three sets of lid-feeding and separating assemblies and a lid-feeding drive assembly. The three sets of lid-feeding and separating assemblies are evenly spaced from each other in a circular pattern inside the drop-lid base. The three sets of lid-feeding and separating assemblies are also located below the drop-lid storage channel. The lid-feeding drive assembly is in transmission connection with the three sets of lid-feeding and separating assemblies. The present invention also includes a protective cover detachably mounted on one side of the drop-lid base. By removing the protective cover, it is possible to observe whether a lid dropped into the drop-lid base is stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the drop cover structure of the utility model;

[0018] Figure 2 This is a structural diagram of the drop cover structure of the utility model from another angle;

[0019] Figure 3 This is a schematic diagram of the relationship between the cover feeding and separating components and the cover feeding drive component of the utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the relationship between the cover feeding and separating components and the cover feeding drive component of the utility model. Figure 2 ;

[0021] Figure 5 This is a structural diagram of the cam divider of the utility model;

[0022] Figure 6 This is a schematic diagram of the relationship between the cover feeding and separating components and the cover feeding rotating element of the utility model. Figure 1 ;

[0023] Figure 7 This is a schematic diagram of the relationship between the cover feeding and separating components and the cover feeding rotating element of the utility model. Figure 2 ;

[0024] Figure 8 This is a structural diagram of the cover feeding and separating wheel of the utility model;

[0025] Figure 9 This is a schematic diagram of the cover of the present invention falling along the cover guide track of the cover feeding and separating wheel;

[0026] Figure 10 Schematic diagram of the cover drop base and cover separation and feeding mechanism in Example 2 of the present utility model;

[0027] Figure 11This is a schematic diagram of the use of the drop cover structure of the utility model for the turntable upper cover.

[0028] In the figure, the cover storage channel 1, the cover stopper 11, the positioning ring 12, the cover base 2, the observation port 21, the first threaded hole 22, the through groove 23, the cover separation and feeding mechanism 3, the cover feeding and feeding assembly 31, the cover feeding and feeding wheel 311, the cover separation knife 312, the blade 3121, the cover guide track 313, the cover drop notch 314, the cover feeding drive assembly 32, the cover feeding rotating element 321, the cover feeding wheel shaft 3211, the cover feeding synchronous wheel 3212, the cover feeding synchronous belt 3213, the transmission synchronous wheel 3214, the transfer driving shaft 3215, the rotation driving element 322, the cam divider 3221, the input force shaft 32211, and the first transmission member 3222 , first transmission base 32221, first transmission shaft 32222, first bevel gear 32223, second transmission member 3223, second transmission base 32231, second transmission shaft 32232, second bevel gear 32233, drive motor 3224, drive active wheel 3225, drive driven wheel 3226, transmission timing belt 3227, synchronous tensioning assembly 3228, right-angle driving wheel 32281, first tensioning synchronous wheel 32282, second tensioning synchronous wheel 32283, tensioning timing belt 32284, synchronous fixed wheel 32285, protective cover 4, second threaded hole 41, cover 5, turntable 6, workbench 7. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figures 1-9As shown, embodiment 1 of the present invention provides a drop cover structure provided with a protective cover 4, which includes a drop cover storage channel 1, a drop cover base 2, a cover separation and feeding mechanism 3, and a protective cover 4. The bottom end of the drop cover storage channel 1 is connected to the top of the drop cover base 2, the cover separation and feeding mechanism 3 is installed inside the drop cover base 2, and the protective cover 4 is detachably installed on one side of the drop cover base 2. When specifically implemented, an observation port 21 is provided on one side of the drop cover base 2, and a first threaded hole 22 is provided on one side of the drop cover base 2. The first threaded hole 22 is distributed on the outside of the observation port 21, and the protective cover 4 has a first threaded hole 22 that is connected to the drop cover base 2. A second threaded hole 41 and a connecting screw that match the threaded hole 22, the protective cover 4 covers the observation port 21, and the connecting screw passes through the second threaded hole 41 of the protective cover 4 and the first threaded hole 22 of the cover-dropping base 2 to detachably mount the protective cover 4 on one side of the cover-dropping base 2; the cover-dropping and cover-feeding mechanism 3 includes three groups of cover-dropping and cover-feeding assemblies 31 and a cover-feeding drive assembly 32. The three groups of cover-dropping and cover-feeding assemblies 31 are uniformly distributed inside the cover-dropping base 2 in a circular manner, and the three groups of cover-dropping and cover-feeding assemblies 31 are also located below the cover-dropping and cover-storing channel, and the cover-feeding drive assembly 32 is transmission-connected to the three groups of cover-dropping and cover-feeding assemblies 31. The drop-cover structure of the present invention is provided with a protective cover 4, which is detachably mounted on one side of the drop-cover base 2. By removing the protective cover 4, it is possible to observe whether the cover 5 dropped into the inside of the drop-cover base 2 is stuck. In the present invention, the cover-feeding mechanism 3 is provided with three groups of cover-feeding and cover-feeding components 31, and the three groups of cover-feeding and cover-feeding components 31 are uniformly distributed at the lower end of the drop-cover storage channel 1 in a circular manner. By utilizing the principle of three points determining a plane, it is possible to ensure that the cover 5 can stably fall on the three groups of cover-feeding and cover-feeding components 31, thereby avoiding the problem of tilting and unstable cover feeding when the cover 5 falls into the drop-cover base 2.

[0032] The utility model provides a through slot 23 at the top of the drop cover base 2, and the drop cover base 2 is communicated with the drop cover storage channel 1 through the through slot 23 at the top. A accommodating cavity is provided inside the drop cover base 2, and three groups of cover feeding and separating assemblies 31 are located in the accommodating cavity of the drop cover base 2. In specific implementation, the drop cover storage channel 1 includes a plurality of drop cover stop rods 11 and a positioning ring 12. The plurality of drop cover stop rods 11 are evenly spaced from each other in a circular shape. The plurality of drop cover stop rods 11 form a drop cover storage channel 1 for dropping and temporarily storing the lid 5, and the positioning ring 12 is sleeved on the outside of the plurality of drop cover stop rods 11.

[0033] The cover delivery and separation assembly 31 comprises a cover delivery and separation wheel 311 and a cover separation knife 312. The cover separation knife 312 is mounted on the top of the cover delivery and separation wheel 311. When the cover delivery and separation wheel 311 is implemented, the cover separation knife 312 is mounted on one side of the top of the cover delivery and separation wheel 311 by bolts. The outer wall surface of the cover delivery and separation wheel 311 is provided with a cover guide track 313. The cover guide track 313 is distributed from top to bottom along the outer wall surface of the cover delivery and separation wheel 311. A cover is formed on the edge of one side of the cover separation knife 312 for cutting into the cover drop and storage channel. The blade 3121 of the lid 5 and the edge of the top of the lid feeding and separating wheel 311 are formed with a lid dropping notch 314 for facilitating the falling of the lid 5. The edge of the falling lid 5 can fall on the lid dropping notch 314 on the edge of the lid feeding and separating wheel 311. The lid separating knife 312 rotates with the lid feeding and separating wheel 311, and the lid 5 falling on the lid dropping notch 314 is separated by the lid separating knife 312. The top of the lid guide track 313 is connected to the lid dropping notch 314 on the edge of the lid feeding and separating wheel 311, and the lid separating knife 312 is also located at the top of the lid guide track 313. After the cap 5 passes through the blade 3121 of the cap separating knife 312 and is separated, the cap 5 at the edge of the cap feeding and separating wheel 311 is guided into the cap guide track 313 during the falling process under the rotation of the cap feeding and separating wheel 311, so that the cap 5 moves downward in the cap guide track 313 until the cap 5 reaches the bottom of the cap guide track 313 of the cap feeding and separating wheel 311. The speed and time for the cap 5 to fall from the top edge of the cap feeding and separating wheel 311 to the bottom thereof are the same as the speed and time for the cap separating knife 312 to rotate.

[0034] The cover feeding drive assembly 32 of the present invention includes a cover feeding rotating element 321 and a rotating driving element 322. One end of the cover feeding rotating element 321 is connected to the cover feeding and separating assembly 31 for transmission, and the other end of the cover feeding rotating element 321 is connected to the rotating driving element 322 for transmission. The cover feeding rotating element 321 includes a cover feeding wheel shaft 3211, a cover feeding synchronous wheel 3212, a cover feeding synchronous belt 3213, a transmission synchronous wheel 3214, a transfer driving shaft 3215, and a cover feeding synchronous wheel 3212. Located above the cover feeding and separating wheel 311, the cover feeding wheel shaft 3211 passes through the cover feeding synchronous wheel 3212 and the middle part of the cover feeding and separating wheel 311 from top to bottom. The transmission synchronous wheel 3214 is located on one side of the cover feeding synchronous wheel 3212. The upper end of the transfer driving shaft 3215 is connected to the middle part of the transmission synchronous wheel 3214. The lower end of the transfer driving shaft 3215 is connected to the rotation driving element 322. The cover feeding synchronous belt 3213 is sleeved on the cover feeding synchronous wheel 3212 and the transmission synchronous wheel 3214 above the cover feeding and separating wheel 311. By arranging the cover feeding synchronous belt 3213, the cover feeding wheel shaft 3211, the cover feeding synchronous wheel 3212 and the transmission synchronous wheel 3214, the synchronous rotation of the cover feeding and separating wheels 311 is achieved, so as to control the three cover feeding and separating wheels 311 to be driven at a uniform speed and in the same direction. In this embodiment, the transmission method of using the cover feeding synchronous belt 3213 to drive the cover feeding and separating wheels 311 to rotate can improve the transmission stability and reduce noise.

[0035] In an embodiment of the present utility model, the cover feeding drive assembly 32 includes a cam divider 3221, a first transmission member 3222, a second transmission member 3223, and a synchronous tensioning assembly 3228. The cover feeding synchronous belt 3213 of the cover feeding rotating element 321 is also sleeved on the outside of the transmission synchronous wheel 3214. The lower end of the transfer driving shaft 3215 is connected to the first transmission member 3222, and the first transmission member 3222 is engaged with the second transmission member 3223. One end of the synchronous tensioning assembly 3228 is transmission-connected to the second transmission member 3223, and the other end of the synchronous tensioning assembly 3228 is transmission-connected to one end of the input force shaft 32211 of the cam divider 3221. In a specific implementation, the cap feeding drive assembly 32 includes a drive motor 3224, a drive driving pulley 3225, a drive driven pulley 3226, and a transmission timing belt 3227. The motor shaft of the drive motor 3224 is connected to the drive driving pulley 3225, the drive driven pulley 3226 is connected to the other end of the input force shaft 32211 of the cam divider 3221, and the transmission timing belt 3227 is sleeved over the drive driving pulley 3225 and the drive driven pulley 3226. The drive driven pulley 3226 is connected to the drive driving pulley 3225 via the transmission timing belt 3227. Driven by the drive motor 3224, the drive driving pulley 3225, the drive driven pulley 3226, and the transmission timing belt 3227, the input force shaft 32211 of the cam divider 3221 rotates, so that the input force shaft 32211 of the cam divider 3221 drives the synchronous tensioning assembly 3228 to move.

[0036] In the embodiment of the present utility model, the first transmission member 3222 includes a first transmission seat 32221, a first transmission shaft 32222, and a first bevel gear 32223. The first transmission shaft 32222 passes through the first transmission seat 32221, one end of the first transmission shaft 32222 is connected to the transfer driving shaft 3215, and the other end of the first transmission shaft 32222 is connected to the first bevel gear 32223; the second transmission member 3223 includes a second transmission seat 32231, a second transmission shaft 32232, and a second bevel gear 32233. The second transmission shaft 32232 passes through the second transmission seat 32231, one end of the second transmission shaft 32232 is connected to one end of the synchronous tensioning assembly 3228, and the other end of the second transmission shaft 32232 is connected to the second bevel gear 32233. The gear 32233 is connected, and the second transmission shaft 32232 is meshed with the first bevel gear 32223 through the second bevel gear 32233. The synchronous tensioning assembly 3228 includes a right-angle driving wheel 32281, a first tensioning synchronous wheel 32282, a second tensioning synchronous wheel 32283, a tensioning synchronous belt 32284, and a synchronous fixed wheel 32285. The tensioning synchronous belt 32284 is sleeved on the right-angle driving wheel 32281, the first tensioning synchronous wheel 32282, the second tensioning synchronous wheel 32283, and the synchronous fixed wheel 32285. The right-angle driving wheel 32281 is transmission-connected to one end of the second transmission shaft 32232, and the synchronous fixed wheel 32285 is transmission-connected to the input force shaft 32211 of the cam divider 3221.

[0037] Example 2

[0038] Embodiment 2 of the present invention provides a drop cover structure provided with a protective cover 4, and its structure is basically the same as that of embodiment 1. For the convenience of description and to save space, only the contents different from embodiment 1 will be described below.

[0039] A drop cover structure provided with a protective cover 4, the drop cover structure includes a drop cover storage channel 1, a drop cover base 2, and a cover separation and feeding mechanism 3. An observation port 21 is provided on one side of the drop cover base 2. The cover separation and feeding mechanism 3 includes two sets of cover feeding and separating components 31 and a cover feeding drive component 32. The two sets of cover feeding and separating components 31 are symmetrically distributed inside the drop cover base 2, such as Figure 10 shown.

[0040] The cover dropping structure of the present invention utilizes the cover feeding drive assembly 32 to drive the three sets of cover feeding and separating assemblies 31 to rotate synchronously in the same direction, which is convenient for the three sets of cover feeding and separating assemblies 31 to separate and feed the covers 5, and can improve the stability of the cover dropping, separating and transferring of the covers 5. In addition, the cover separating and feeding mechanism 3 provided in the present invention is suitable for the cover on the turntable 6, and is highly practical. Figure 11 , which is a schematic diagram of the use state of the drop cover structure of the utility model for the upper cover of the turntable 6. The drop cover structure of the utility model can be installed on the workbench 7.

[0041] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A drop cover structure provided with a protective cover, characterized in that: The cover-dropping structure includes a cover-dropping and storage channel, a cover-dropping base, a cover-splitting and cover-feeding mechanism, and a protective cover. The bottom end of the cover-dropping and storage channel is communicated with the top end of the cover-dropping base. The cover-splitting and cover-feeding mechanism is installed inside the cover-dropping base. The protective cover is detachably installed on one side of the cover-dropping base. The cover-splitting and cover-feeding mechanism includes three groups of cover-feeding and cover-splitting assemblies and a cover-feeding drive assembly. The three groups of cover-feeding and cover-splitting assemblies are uniformly distributed in a circular manner inside the cover-dropping base. The three groups of cover-feeding and cover-splitting assemblies are also located below the cover-dropping and storage channel. The cover-feeding drive assembly is transmission-connected to the three groups of cover-feeding and cover-splitting assemblies.

2. The drop cover structure with a protective cover according to claim 1, characterized in that: An observation port is provided on one side of the drop cover base, and a first threaded hole is provided on one side of the drop cover base. The first threaded hole is distributed on the outside of the observation port. A second threaded hole and a connecting screw that match the first threaded hole of the drop cover base are provided on the protective cover. The protective cover covers the observation port, and the connecting screw passes through the second threaded hole of the protective cover and the first threaded hole of the drop cover base to detachably mount the protective cover on one side of the drop cover base.

3. The drop cover structure provided with a protective cover according to claim 1, characterized in that: Each set of cover feeding and separating components includes a cover feeding and separating wheel and a cover separating knife. The cover separating knife is installed on the top of the cover feeding and separating wheel. The outer wall of the cover feeding and separating wheel is provided with a cover guide track, which is distributed from top to bottom along the outer wall of the cover feeding and separating wheel.

4. The drop cover structure provided with a protective cover according to claim 3, characterized in that: The edge of one side of the cap separating knife is formed with a blade for cutting into the caps dropped from the cap dropping and storing channel, and the edge of the top end of the cap feeding and cap separating wheel is formed with a cap dropping notch for facilitating the caps to drop.

5. The drop cover structure provided with a protective cover according to claim 1, characterized in that: The cap feeding drive assembly includes a cap feeding rotating element and a rotating drive element. One end of the cap feeding rotating element is transmission-connected to the cap feeding and separating assembly, and the other end of the cap feeding rotating element is transmission-connected to the rotating drive element.

6. The drop cover structure provided with a protective cover according to claim 5, characterized in that: The cap feeding rotating element includes a cap feeding wheel shaft, a cap feeding synchronous wheel, a cap feeding synchronous belt, a transmission synchronous wheel, and a transfer driving shaft, the cap feeding synchronous wheel is located above the cap feeding and separating wheel, the cap feeding wheel shaft passes through the middle of the cap feeding synchronous wheel and the cap feeding and separating wheel from top to bottom, the transmission synchronous wheel is located on one side of the cap feeding synchronous wheel, the upper end of the transfer driving shaft is connected to the middle of the transmission synchronous wheel, the lower end of the transfer driving shaft is connected to the rotation driving element, and the cap feeding synchronous belt is sleeved on the cap feeding synchronous wheel and the transmission synchronous wheel above the cap feeding and separating wheel; The cover feeding drive assembly includes a cam divider, a first transmission member, a second transmission member, and a synchronous tensioning assembly. The cover feeding synchronous belt of the cover feeding rotating element is also sleeved on the outside of the transmission synchronous wheel. The lower end of the transfer driving shaft is connected to the first transmission member, and the first transmission member is engaged with the second transmission member. One end of the synchronous tensioning assembly is transmission-connected to the second transmission member, and the other end of the synchronous tensioning assembly is transmission-connected to one end of the input force shaft of the cam divider.

7. The drop cover structure provided with a protective cover according to claim 6, characterized in that: The cover feeding drive assembly includes a driving motor, a driving active wheel, a driving driven wheel, and a transmission synchronous belt. The motor shaft of the driving motor is connected to the driving active wheel, and the driving driven wheel is connected to the other end of the input force shaft of the cam divider. The transmission synchronous belt is sleeved on the driving active wheel and the driving driven wheel, and the driving driven wheel is connected to the driving active wheel through the transmission synchronous belt.

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