Bottle cap assembling device

Abstract

The invention relates to a bottle cap assembling device, and relates to the technical field of bottle cap assembly.The bottle cap assembling device comprises a base, a grabbing part and a moving frame arranged on the base, the base is rotationally provided with a feeding disc, the feeding disc is provided with a feeding groove used for containing bottle caps, the base is provided with a driving part, the driving part is used for driving the feeding disc to rotate, and the grabbing part is arranged on the moving frame; the base is provided with a material moving assembly, the material moving assembly is used for feeding and discharging bottle caps, the base is provided with a conveying belt, the conveying belt is used for feeding breathable plugs, the moving frame is provided with a moving assembly used for driving a grabbing piece to move, and the grabbing piece is used for grabbing the breathable plugs. The method has the effect of improving the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bottle cap assembly, and in particular to a bottle cap assembly device. Background Art

[0002] The bottle cap is a component used to close the opening of a bottle-shaped item. Most of them are detachable to facilitate opening the bottle. In some special fields, it is necessary to maintain the air permeability inside the bottle, so a ventilation structure needs to be set on the bottle cap. Common ventilation structures are that there are ventilation holes running through the bottle cap, and a ventilation plug is installed in the inner cavity of the bottle cap to cooperate with the ventilation holes to achieve the ventilation function.

[0003] The common installation structure of the vent plug in the prior art is that a plug groove is provided in the inner cavity of the bottle cap, and the vent plug is provided with an elastic plug block, which is inserted into the plug groove with interference fit, thereby fixing the vent plug on the bottle cap.

[0004] However, in the actual assembly process of bottle caps, the vent plugs are mostly installed manually by workers. When assembling bottle caps on a large scale, workers will inevitably become fatigued, resulting in the need to improve the overall assembly efficiency. Summary of the Invention

[0005] In order to improve assembly efficiency, the present application provides a bottle cap assembly device.

[0006] The present application provides a bottle cap assembly device that adopts the following technical solutions: A bottle cap assembly device comprises a base, a grabbing piece and a movable frame arranged on the base, the base is rotatably provided with a loading tray, the loading tray is provided with a loading trough for accommodating bottle caps, the base is provided with a driving piece, the driving piece is used to drive the loading tray to rotate, the base is provided with a material moving component, the material moving component is used to load and unload bottle caps, the base is provided with a conveyor belt, the conveyor belt is used to load air plugs, the movable frame is provided with a movable component for driving the grabbing piece to move, and the grabbing piece is used to grab the air plugs.

[0007] By adopting the above technical solution, the material transfer component sends the bottle cap into the loading trough on the loading tray, and then the driving part rotates the loading tray to drive the bottle cap to move close to the movable rack, and at the same time drives the grabbing part to move to the conveyor belt through the movable component to grab the vent plug first, and then the vent plug is inserted into the bottle cap and released when the movable component drives the grabbing part to move. At this time, the loading tray continues to rotate to drive the assembled bottle cap to move, and the unloading is completed through the material transfer component. The operation is simple and convenient, and the movement and assembly of the bottle cap and the vent plug are completed through the component, which reduces labor intensity and thus improves assembly efficiency.

[0008] Preferably, the material moving assembly includes a loading track and a unloading track, the base is provided with a rotating groove, the loading plate is rotatably set in the rotating groove, the outer wall of the base is provided with a first track groove and a second track groove which are communicated with the rotating groove, the loading track is tilted on the base and inserted into the first track groove, and the unloading track is tilted on the base and inserted into the second track groove.

[0009] By adopting the above technical solution, with the help of gravity, during the rotation of the loading tray, the inclined loading track will drive the bottle caps placed therein to slide through the first track groove into the rotating groove of the loading tray to rotate with the loading tray. When the assembly is completed, the loading tray continues to rotate to drive the bottle caps to rotate until the bottle caps fall into the unloading track through the second track groove, and continue to slide to complete the unloading. The operation is simple and convenient, the labor intensity is reduced, the convenience of use is further improved, and the efficiency of bottle cap assembly is improved.

[0010] Preferably, the base is provided with a driving groove, the driving member is a driving motor, the driving motor is arranged in the driving groove, and the driving motor shaft is connected to the loading tray.

[0011] By adopting the above technical solution, the driving motor in the driving slot drives the loading tray to rotate, which is simple and convenient to operate and easy to use.

[0012] Preferably, the loading tray, conveyor belt and grabbing piece are each provided with two groups, the driving motor shaft is connected to one of the loading trays, a first bevel gear and a second bevel gear are rotatably arranged in the driving groove, the first bevel gear is connected to the driving motor shaft, the loading tray not connected to the driving motor is connected to the second bevel gear, and a third bevel gear and a fourth bevel gear connected to each other are also rotatably arranged in the driving groove, the third bevel gear engages with the first bevel gear, and the fourth bevel gear engages with the second bevel gear.

[0013] By adopting the above technical solution, when the driving motor is started to rotate one of the loading trays, the first bevel gear is driven to rotate, which is engaged to drive the third bevel gear to rotate, and the second bevel gear is driven to rotate with the help of the fourth bevel gear, thereby driving the other loading tray to rotate, thereby saving driving parts and achieving energy saving and consumption reduction.

[0014] Preferably, the conveyor belt is rotated with a connecting roller, which connects the rollers of two sets of conveyor belts. A first connecting gear is sleeved on the connecting roller, and a second connecting gear connected to the third bevel gear is provided in the driving groove. The first connecting gear is inserted into the driving groove and engages with the second connecting gear.

[0015] By adopting the above technical solution, after the driving motor is started, it drives the loading tray to rotate. At the same time, the rotation of the third bevel gear will drive the second connecting gear to rotate, thereby driving the connecting roller to rotate under the engagement of the first connecting gear, thereby driving the transmission belt to start and transport the air plug, saving driving parts, saving energy and reducing consumption, while the transmission connects the rotation of the loading tray and the start of the transmission belt, simplifying the operation and further improving the convenience of assembly.

[0016] Preferably, the conveyor belt housing is provided with a protective cover, which shields the connecting roller and the first connecting gear.

[0017] By adopting the above technical solution, the protective cover reduces the possibility of the rotating roller and the first connecting gear being damaged by collision, thereby improving durability.

[0018] Preferably, the moving assembly includes a horizontal moving cylinder and a moving block, the moving block is slidably arranged on the moving frame, the horizontal moving cylinder is arranged on the moving frame, and the horizontal moving cylinder piston rod is connected to the moving block.

[0019] By adopting the above technical solution, the horizontal moving cylinder drives the moving block to move horizontally on the moving frame, which is easy and convenient to operate and improves the convenience of moving the grabbing piece between the loading tray and the conveyor belt.

[0020] Preferably, the moving assembly further comprises a vertical moving cylinder, which is arranged on the moving block; the grabbing member is a suction cup, which can absorb the air plug, and the suction cup is arranged on the piston rod of the vertical moving cylinder.

[0021] By adopting the above technical solution, after the horizontal moving cylinder drives the moving block to move, the vertical moving cylinder can be started to drive the suction cup to move up and down. When the suction cup moves to the air plug, it can adsorb the air plug to complete the grabbing. The vertical moving cylinder drives the suction cup to move up and down, and cooperates with the horizontal movement of the horizontal moving cylinder to complete the movement of the suction cup, so as to complete the process of installing the air plug from the transmission belt to the bottle cap on the loading tray. The operation is simple and convenient.

[0022] Preferably, the moving assembly also includes a first moving gear, a second moving gear, a third moving gear, a first moving rack, a second moving rack and a third moving rack. The first moving gear, the second moving gear and the third moving gear are all rotatably set on the moving block. The first moving gear is engaged with the second moving gear. The third moving gear is connected to the first moving gear. The first moving rack and the second moving rack are both set on the moving frame. The first moving rack can engage with the first moving gear. The second moving rack can engage with the second moving gear. The third moving rack is slidably set on the moving block and engages with the third moving gear.

[0023] By adopting the above technical solution, when the horizontal moving cylinder drives the moving block to move toward the conveyor belt, the first moving gear engages with the first moving rack, thereby driving the first moving gear to rotate, and the third moving rack is driven to descend with the help of the third moving gear, so that the grabbing piece moves close to the air plug placed on the conveyor belt, and then the horizontal moving cylinder drives the moving block to move close to the loading disk. During this process, the first moving rack first engages with the first moving gear, thereby driving the third moving gear and the grabbed air plug to rise through the third moving gear, and moving the first moving gear to disengage from the first moving rack. At the same time, the second moving gear engages with the second moving rack and rotates, thereby driving the first moving gear to rotate, and driving the third moving gear and the grabbed air plug to descend through the third moving gear, so that the air plug is inserted into the bottle cap fixed on the loading disk, completing the assembly. The operation is simple and convenient, further simplifies the operation, and improves the assembly efficiency.

[0024] Preferably, the movable frame is provided with a movable groove for sliding insertion of the movable block, the first movable rack and the second movable rack are arranged in the movable groove, the movable block is provided with a gear groove, the first movable gear, the second movable gear and the third movable gear are all rotatably arranged in the gear groove, and the third movable rack is slidably arranged in the gear groove.

[0025] By adopting the above technical solution, components such as gears and racks are arranged in grooves, reducing the exposed area of parts, reducing the possibility of gears and racks and other components being damaged by collisions, and improving durability.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The system comprises a base, a grabbing member, a mobile frame, a loading tray, a loading chute, a driving member, a material transfer assembly, a conveyor belt and a mobile assembly. The driving member drives the loading tray on the base to rotate, thereby cooperating with the material transfer assembly and the loading chute to drive the bottle caps to move for loading and unloading. At the same time, the mobile assembly drives the grabbing member to move on the mobile frame, thereby grabbing the vent plug on the conveyor belt and inserting it into the bottle cap in the loading chute to complete the assembly. The system is simple and convenient to operate, reduces labor intensity and improves assembly efficiency. 2. By setting a loading track, unloading track, rotating groove, first track groove and second track groove, the bottle caps are placed in the inclined loading track. Under the action of gravity, the bottle caps slide into the loading groove of the loading tray through the first track groove. The bottle caps then rotate with the loading tray and are assembled. The assembled bottle caps continue to rotate and fall into the unloading track in the second track groove and continue to slide down, thus completing the unloading. The operation is simple and convenient, and the bottle caps are automatically loaded and unloaded, which improves the convenience of use, simplifies the operation, reduces labor intensity and improves the assembly efficiency. 3. By setting a driving motor, a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a driving slot, starting the driving motor in the driving slot to drive one of the loading trays to rotate, while driving the first bevel gear to rotate, engaging and driving the third bevel gear to rotate, thereby driving the fourth bevel gear to rotate, and with the help of the engagement of the second bevel gear, driving the other loading tray to rotate. The operation is simple, convenient and easy to use, while saving driving parts, saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an overall schematic diagram of a bottle cap assembly device provided in Example 1 of the present application.

[0028] Figure 2 It is a cross-sectional view used to reflect the internal structure of the base.

[0029] Figure 3 It is a cross-sectional view used to reflect the positional relationship between the drive motor and the loading tray.

[0030] Figure 4 This is an overall schematic diagram of a bottle cap assembly device provided in Example 2 of the present application.

[0031] Figure 5 It is a cross-sectional view used to show the positional relationship between the gears and racks in the moving assembly.

[0032] Explanation of the reference numerals: 1. base; 11. rotating groove; 111. first track groove; 112. second track groove; 12. driving groove; 2. moving frame; 21. first bracket; 22. second bracket; 221. moving groove; 23. connecting rod; 3. loading tray; 31. loading trough; 32. driving motor; 321. first bevel gear; 322. second bevel gear; 323. third bevel gear; 324. fourth bevel gear; 4. conveyor belt; 41. connecting roller; 42. first A connecting gear; 43. A second connecting gear; 44. An auxiliary gear; 45. A protective cover; 5. A material moving assembly; 51. A loading track; 52. A unloading track; 6. A suction cup; 7. A moving assembly; 71. A horizontal moving cylinder; 72. A vertical moving cylinder; 73. A moving block; 731. A gear slot; 74. A first moving gear; 75. A first moving rack; 76. A second moving gear; 77. A second moving rack; 78. A third moving gear; 79. A third moving rack. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The first embodiment of the present application discloses a bottle cap assembly device. Figures 1 to 2The invention comprises a base 1, a gripping member, and a mobile frame 2. The mobile frame 2 comprises a first vertical bracket 21, a second horizontal bracket 22, and a connecting rod 23 connecting the second bracket 22. The first bracket 21 is fixedly mounted on the base 1, and the second bracket 22 is fixedly connected to the first bracket 21. The gripping member is a suction cup 6, which is connected to a vacuum pump via a pipe (the pipe and vacuum pump are not shown) for gripping the vent plug. The base 1 is provided with two rotating grooves 11 on its surface, and a loading tray 3 is adapted to rotate within the rotating grooves 11. The outer wall of the loading tray 3 is provided with multiple loading grooves 31. The base 1 is provided with a driving member for rotating the loading tray 3. The base 1 is provided with a material transfer assembly 5 for loading and unloading bottle caps. The base 1 is provided with two sets of conveyor belts 4 for loading vent plugs. The mobile frame 2 is also provided with a moving assembly 7 for moving the suction cup 6. The movement and assembly of the bottle caps and vent plugs are completed by the assembly, reducing labor intensity and thus improving assembly efficiency.

[0035] In order to facilitate the loading and unloading of bottle caps, refer to Figure 1 and Figure 2 The material moving assembly 5 includes a loading track 51 and a unloading track 52. The side wall of the base 1 away from the side of the mobile frame 2 is provided with two sets of second track grooves 112 respectively communicating with the loading trough 31. The other two sides of the base 1 are provided with two sets of first track grooves 111 respectively communicating with the loading trough 31. The loading track 51 is fixedly arranged on the base 1 with a downward tilt and is adapted to be inserted into the first track groove 111. The unloading track 52 is fixedly arranged on the base 1 with a downward tilt and is adapted to be inserted into the second track groove 112. The loading track 51 is connected to the bottle cap production line. After the bottle caps enter the loading track 51, they slide into the loading trough 31 of the rotating loading tray 3 and are assembled with the rotation. After assembly, the bottle caps rotate to the top of the unloading track 52 and fall into the unloading track 52 under the action of gravity. They then slide into the receiving device connected to the unloading track 52. The operation is simple and convenient. With the help of gravity, the loading and unloading of bottle caps is convenient.

[0036] In order to save energy and reduce consumption, refer to Figure 2 and Figure 3A drive slot 12 is provided inside the base 1. The driving member is a drive motor 32 and is fixedly disposed in the drive slot 12. The rotating shaft of the drive motor 32 is coaxially fixedly connected to the rotating shaft of one of the loading trays 3. A first bevel gear 321 and a second bevel gear 322 are rotatably disposed in the drive slot 12. The first bevel gear 321 is coaxially fixedly connected to the rotating shaft of the drive motor 32. The loading tray 3 not connected to the drive motor 32 is coaxially fixedly connected to the second bevel gear 322. A third bevel gear 323 and a fourth bevel gear 324, which are coaxially connected via the rotating shaft, are also rotatably disposed in the drive slot 12. The third bevel gear 323 engages with the first bevel gear 321, and the fourth bevel gear 324 engages with the second bevel gear 322. Through the transmission of two sets of bevel gears by a single drive motor 32, the two loading trays 3 are synchronously driven to rotate at the same speed, which is simple and convenient to operate while saving energy and reducing consumption.

[0037] In order to further save energy and reduce consumption, refer to Figure 2 and Figure 3 A connecting roller 41 is coaxially fixed between the rollers of the two sets of conveyor belts 4 near one end of the base 1. A first connecting gear 42 is adapted to be mounted on the connecting roller 41. A second connecting gear 43 is mounted on the rotating shaft connecting the third bevel gear 323 and the fourth bevel gear 324. Several auxiliary gears 44 are rotatably mounted in the rotating groove 11. The auxiliary gears 44 mesh with each other, and the auxiliary gears 44 at both ends mesh with the first connecting gear 42 and the second connecting gear 43 respectively. The base 1 is provided with a protective cover 45 connected to the side wall of the protective frame of the conveyor belt 4 to shield the connecting roller 41 and the first connecting gear 42. After the drive motor 32 is started, it drives the connecting roller 41 to rotate by direct engagement of the gears, thereby controlling the synchronous start of the transmission belt and the loading tray 3. During the process of grabbing and assembling the vent plugs into the bottle caps, the loading tray 3 and the conveyor belt 4 remain stationary, improving the stability of the assembly while further saving energy and reducing consumption. Baffles are provided on both sides of the conveyor belt 4 so that the transport width of the conveyor belt 4 is consistent with the width of the vent plug, and a baffle is also provided at one end of the conveyor belt 4 close to the base to block the vent plug for positioning the vent plug.

[0038] For easy assembly, refer to Figure 1 The moving assembly 7 includes a horizontal moving cylinder 71, a moving block 73, and a vertical moving cylinder 72. The moving block 73 is slidably arranged between the second brackets 22. The horizontal moving cylinder 71 is fixedly mounted on the second bracket 22, and its piston rod is connected to the moving block 73. Two sets of vertical moving cylinders 72 are provided, both fixedly mounted on the bottom wall of the moving block 73. The vertical moving cylinder 72 is located directly above the conveyor belt 4, and its piston rod is fixedly connected to the suction cup 6. The horizontal moving cylinder 71 pushes the moving block 73 to move horizontally above the loading tray 3 and the conveyor belt 4. In conjunction with the vertical moving cylinder 72, the suction cup 6 moves up and down, thereby grabbing the vent plug on the conveyor belt 4 and inserting it into the bottle cap in the loading chute 31. The assembly is completed, and the operation is simple and convenient.

[0039] The second embodiment of the present application discloses a bottle cap assembly device, referring to Figure 4 and Figure 5 Compared with the first embodiment, the second embodiment differs in the structure of the moving assembly 7. The moving assembly 7 in the second embodiment includes a horizontal moving cylinder 71, a moving block 73, a first moving gear 74, a second moving gear 76, a third moving gear 78, a first moving rack 75, a second moving rack 77, and a third moving rack 79. A moving groove 221 is provided along the length of the opposite side of the second bracket 22. The moving block 73 is adapted to be inserted into and movable within the moving groove 221. The horizontal moving cylinder 71 is fixedly mounted on the second bracket 22, and its piston rod is connected to the moving block 73.

[0040] The moving block 73 is provided with a gear slot 731 at each end. The first moving gear 74 and the second moving gear 76 are both rotatably mounted in the gear slot 731 and mesh with each other. The first moving rack 75 and the second moving rack 77 are both fixedly mounted on the bottom wall of the moving slot 221 along the length direction. The first moving rack 75 can mesh with the first moving gear 74 but not with the second moving gear 76. The second moving rack 77 can mesh with the second moving gear 76 but not with the first moving gear 74. The third moving gear 78 is rotatably mounted in the moving slot 221 and is coaxially fixedly connected to the first moving gear 74. The third moving rack 79 is vertically slidably mounted in the moving slot 221 and meshes with the third moving gear 78. The suction cup 6 is fixedly mounted on the bottom wall of the third moving rack 79.

[0041] When the horizontal moving cylinder 71 drives the moving block 73 to move closer to the conveyor belt 4, the first moving rack 75 engages and drives the first moving gear 74 to rotate, thereby driving the third moving rack 79 to descend through the third moving gear 78, so that the suction cup 6 is close to the air plug on the conveyor belt 4; when the moving block 73 moves to the top of the air plug closest to the base 1, the suction cup 6 descends and fits the air plug. At this time, the vacuum operation of the suction cup 6 is started, and the moving block 73 is driven by the horizontal moving cylinder 71 to move in the opposite direction and gradually approach the loading tray 3. In this process, first the second A moving rack 75 drives the first moving gear 74 to rotate, thereby driving the third moving rack 79 to rise and reset. After the first moving gear 74 disengages from the first moving rack 75, the moving block 73 continues to move closer to the base 1, and the second moving rack 77 engages to drive the second moving gear 76 to rotate, thereby engaging and driving the first moving gear 74 to rotate, and the third moving rack 79 is driven to descend through the third moving gear 78, so that the suction cup 6 gradually approaches the bottle cap in the loading trough 31, thereby completing the assembly. The vertical movement is performed with the help of horizontal movement, which simplifies the operation and improves the assembly efficiency.

[0042] Based on the structure of the moving assembly 7 of the second embodiment, in another embodiment, the gripping member may be a robot with an ejection function to enhance the force and stability of the vent plug when inserted into the bottle cap.

[0043] The implementation principle of a bottle cap assembly device according to an embodiment of the present application is as follows: the bottle cap enters the loading trough 31 of the loading tray 3 via the loading track 51. After that, the drive motor 32 is started, and the two loading trays 3 are rotated by the meshing of the bevel gears, so that the bottle cap moves with it to the assembly point near the conveyor belt 4, so that the suction cup 6 can move to the top of the bottle cap to be assembled. At the same time, after the drive motor 32 is started, the meshing of the bevel gears and the gears drives the connecting roller 41 to rotate, thereby driving the transmission belt to rotate to load the vent plug, so that the vent plug moves to the gripping point near the base 1. Then, the suction cup 6 is driven by the moving component 7 to move to the vent plug gripping point and cooperate with the vacuum pump to grip the vent plug. The suction cup 6 is then driven by the moving component 7 to move to the assembly point of the base 1, so that the vent plug is inserted into the bottle cap, completing the assembly. Then, the drive motor 32 is started to drive the loading tray 3 to rotate, and the above steps are repeated to complete the assembly of other bottle caps. At the same time, the assembled bottle cap follows the rotation of the loading tray 3 until it falls into the unloading track 52 to complete the unloading. The operation is simple and convenient, simplifies the operation and reduces the labor intensity, thereby improving the assembly convenience and also improving the efficiency of bottle cap assembly.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bottle cap assembly device, characterized in that: The invention comprises a base (1), a grabbing member and a movable frame (2) arranged on the base (1); the base (1) is rotatably provided with a loading disc (3); the loading disc (3) is provided with a loading trough (31) for accommodating bottle caps; the base (1) is provided with a driving member, the driving member is used to drive the loading disc (3) to rotate; the base (1) is provided with a material moving assembly (5), the material moving assembly (5) is used to load and unload bottle caps; the base (1) is provided with a conveyor belt (4), the conveyor belt (4) is used to load vent plugs; the movable frame (2) is provided with a moving assembly (7) for driving the grabbing member to move, the grabbing member is used to grab the vent plugs.

2. The bottle cap assembly device according to claim 1, characterized in that: The material moving assembly (5) comprises a loading track (51) and a unloading track (52); the base (1) is provided with a rotation groove (11); the loading plate (3) is rotatably arranged in the rotation groove (11); the outer wall of the base (1) is provided with a first track groove (111) and a second track groove (112) which are in communication with the rotation groove (11); the loading track (51) is tiltedly arranged on the base (1) and inserted into the first track groove (111); the unloading track (52) is tiltedly arranged on the base (1) and inserted into the second track groove (112).

3. The bottle cap assembly device according to claim 1, characterized in that: The base (1) is provided with a driving groove (12), the driving member is a driving motor (32), the driving motor (32) is arranged in the driving groove (12), and the rotating shaft of the driving motor (32) is connected to the loading tray (3).

4. The bottle cap assembly device according to claim 3, characterized in that: The loading tray (3), the conveyor belt (4) and the grabbing member are each provided with two groups, the driving motor (32) rotating shaft is connected to one of the loading trays (3), a first bevel gear (321) and a second bevel gear (322) are rotatably provided in the driving groove (12), the first bevel gear (321) is connected to the driving motor (32) rotating shaft, the loading tray (3) not connected to the driving motor (32) is connected to the second bevel gear (322), and a third bevel gear (323) and a fourth bevel gear (324) connected to each other are also rotatably provided in the driving groove (12), the third bevel gear (323) is engaged with the first bevel gear (321), and the fourth bevel gear (324) is engaged with the second bevel gear (322).

5. The bottle cap assembly device according to claim 4, characterized in that: The conveyor belt (4) is provided with a connecting roller (41) for rotating. The connecting roller (41) connects the rotating rollers of the two sets of conveyor belts (4). A first connecting gear (42) is sleeved on the connecting roller (41). A second connecting gear (43) connected to the third bevel gear (323) is provided in the driving groove (12). The first connecting gear (42) is inserted into the driving groove (12) and meshes with the second connecting gear (43).

6. The bottle cap assembly device according to claim 5, characterized in that: The outer shell of the conveyor belt (4) is provided with a protective cover (45), and the protective cover (45) shields the connecting roller (41) and the first connecting gear (42).

7. The bottle cap assembly device according to claim 4, characterized in that: The moving assembly (7) comprises a horizontal moving cylinder (71) and a moving block (73); the moving block (73) is slidably arranged on the moving frame (2); the horizontal moving cylinder (71) is arranged on the moving frame (2); and the piston rod of the horizontal moving cylinder (71) is connected to the moving block (73).

8. The bottle cap assembly device according to claim 7, characterized in that: The moving assembly (7) further comprises a vertical moving cylinder (72), which is arranged on a moving block (73); the grabbing member is a suction cup (6), which can suck up the vent plug; the suction cup (6) is arranged on a piston rod of the vertical moving cylinder (72).

9. The bottle cap assembly device according to claim 7, characterized in that: The moving assembly (7) further comprises a first moving gear (74), a second moving gear (76), a third moving gear (78), a first moving rack (75), a second moving rack (77) and a third moving rack (79); the first moving gear (74), the second moving gear (76) and the third moving gear (78) are all rotatably arranged on the moving block (73); the first moving gear (74) is engaged with the second moving gear (76); the third moving gear (78) is connected to the first moving gear (74); the first moving rack (75) and the second moving rack (77) are both arranged on the moving frame (2); the first moving rack (75) can engage with the first moving gear (74); the second moving rack (77) can engage with the second moving gear (76); the third moving rack (79) is slidably arranged on the moving block (73) and engages with the third moving gear (78).

10. The bottle cap assembly device according to claim 9, characterized in that: The movable frame (2) is provided with a movable groove (221) for the movable block (73) to be slidably inserted, the first movable rack (75) and the second movable rack (77) are arranged in the movable groove (221), the movable block (73) is provided with a gear groove (731), the first movable gear (74), the second movable gear (76) and the third movable gear (78) are all rotatably arranged in the gear groove (731), and the third movable rack (79) is slidably arranged in the gear groove (731).

Images