Cap screwing arm and bottle cap screwing device

Abstract

The utility model relates to the technical field of product packaging, and discloses a cap screwing arm and a bottle cap screwing device. The cap screwing arm comprises a rotation driving mechanism, a transmission mechanism and a pressure adjusting mechanism, the rotation driving mechanism comprises a servo motor, a driving gear, a driven gear and a long-strip gear, the servo motor is connected with the driving gear, the driving gear is meshed with the driven gear, and the driven gear and the long-strip gear are coaxial; the extension length of the transmission mechanism is adjustable, a transmission gear of the transmission mechanism is meshed with the long-strip gear and connected with a rotating shaft of the transmission mechanism, and the rotating shaft is rotatably arranged in an inner cavity of an enclosure sleeve of the transmission mechanism; the pressure adjusting mechanism is used for adjusting the pressure between the bottle cap and the bottle body. The bottle cap screwing device comprises a cam and a cap screwing arm, and the cap screwing arm is in sliding fit with a lifting sliding groove of the cam. According to the cap screwing arm and the bottle cap screwing device, proper screwing force is kept between the bottle cap and the bottle body, the bottle cap can be conveniently opened by a user while the sealing performance of the bottle body is guaranteed, and the use feeling of the user is improved.

Description

Technical Field

[0001] This utility model belongs to the field of product packaging technology, and in particular relates to a capping arm and a bottle cap screwing device. Background Technology

[0002] Bottle packaging mainly includes multiple processes such as material preparation, filling, sealing and labeling. In the sealing stage, for bottles with caps, a cap screwing device is used to tighten the cap to the bottle mouth to ensure the bottle's airtightness and prevent the product from leaking out of the bottle.

[0003] During the tightening process, the gripping arm's gripping head first grasps the bottle cap to the bottle opening. Then, a rotary drive mechanism drives the gripping arm to rotate, causing the gripping head to rotate the bottle cap, thus tightening the cap to the bottle body. However, during the tightening process, after the required torque is reached between the cap and the bottle body, the rotary drive mechanism still needs to separate the gripping head from the cap. This results in a longer tightening time, and the torque between the cap and the bottle body exceeds the required torque, affecting the accuracy of the cap's tightening force and making it more difficult for the user to open the cap, thus reducing the user experience. Conversely, if the gripping head is gradually separated from the cap before the required torque is reached, it cannot be guaranteed that the final torque between the cap and the bottle body will be the required torque, meaning the accuracy of the torque cannot be guaranteed. This also easily leads to insufficient tightening force between the cap and the bottle body, affecting the bottle's seal.

[0004] Therefore, there is an urgent need for a capping arm and a cap screwing device to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cap screwing arm and a bottle cap screwing device, which can maintain a suitable torque between the bottle cap and the bottle body, ensuring the sealing of the bottle body while making it easier for users to open the bottle cap, thus improving the user experience.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, a capping arm is provided, comprising:

[0008] The rotary drive mechanism includes a servo motor, a drive gear, a driven gear, and a rack gear. The output end of the servo motor is connected to the drive gear, the drive gear meshes with the driven gear, and the driven gear and the rack gear are coaxial.

[0009] The transmission mechanism has an adjustable extension length and includes a transmission gear, a rotating shaft, and a protective sleeve. The transmission gear meshes with a long gear and is connected to the rotating shaft. The rotating shaft is rotatably disposed in the inner cavity of the protective sleeve and is sealed to the protective sleeve.

[0010] The pressure regulating mechanism is detachably mounted at the bottom of the transmission mechanism and is sealed to the transmission mechanism. The pressure regulating mechanism is used to regulate the pressure between the bottle cap and the bottle body.

[0011] The cap gripper is detachably mounted at the bottom of the pressure regulating mechanism and is used to grip the bottle cap.

[0012] Optionally, the transmission mechanism further includes a first connecting seat and a second connecting seat. The first connecting seat is disposed on the top of the enclosure sleeve and is sealed to the enclosure sleeve. The transmission gear is rotatably disposed on the first connecting seat. The second connecting seat is disposed on the top of the first connecting seat and is detachably connected to the first connecting seat. A closed rotation space is formed between the second connecting seat and the first connecting seat. The top end of the rotating shaft passes through the first connecting seat and extends into the rotation space. The rotating shaft is rotatably connected to the first connecting seat. The distance between the first connecting seat and the second connecting seat is adjustable.

[0013] Optionally, the transmission mechanism may also include several adjusting pads, which are sandwiched between the first connecting seat and the second connecting seat.

[0014] Optionally, the pressure regulating mechanism includes a sliding sleeve, a sliding shaft, and an elastic element. The gripping head is detachably disposed at the bottom of the sliding shaft, and the rotating shaft is detachably connected to the top of the sliding sleeve. The sliding sleeve is sleeved on the sliding shaft and slides in cooperation with the sliding shaft. The elastic element is elastically limited between the top of the sliding sleeve and the bottom of the sliding shaft. When the sliding sleeve slides relative to the sliding shaft, the elastic element accumulates elastic potential energy.

[0015] Optionally, a sliding key is provided on one of the sliding sleeve and the sliding shaft, and a sliding keyway extending axially along the sliding shaft is provided on the other of the sliding sleeve and the sliding shaft. The sliding key is embedded in the sliding keyway and slides in cooperation with the sliding keyway.

[0016] On the other hand, a bottle cap screwing device is provided, including a bracket, a cam, and a plurality of the above-mentioned capping arms. The cam is disposed on the bracket, and the bracket is rotatable relative to the cam. The cam is provided with a lifting groove extending along its circumference. The lifting groove includes a plurality of rising sections, a plurality of falling sections, and a plurality of horizontal sections. The plurality of capping arms are disposed on the bracket at intervals along the circumference of the cam and are detachably connected to the bracket. The transmission mechanism of the capping arm slides in cooperation with the lifting groove, and the transmission mechanism is movably inserted through the bracket in the vertical direction.

[0017] Optionally, the enclosure sleeve includes a cantilever portion extending outside the support, and the capping arm also includes an adjustable guide mechanism, which is sleeved on the cantilever portion and sealed to the bottom end of the cantilever portion, and the guide mechanism is detachably connected to the support.

[0018] Optionally, the guiding mechanism includes a telescopic tube and a connecting sleeve. One end of the connecting sleeve is detachably connected to the bracket, and the other end is fixedly connected to the telescopic tube. The end of the telescopic tube away from the connecting sleeve is sealed to the bottom end of the cantilever. The cantilever passes through the connecting sleeve and the telescopic tube and slides against the inner wall of the connecting sleeve. The cantilever is also in clearance fit with the inner wall of the telescopic tube.

[0019] Optionally, the transmission mechanism includes a second connecting seat disposed on the top of the rotating shaft, the second connecting seat being rotatably engaged with the rotating shaft, and a sliding member disposed on the second connecting seat, the sliding member being slidably engaged with the lifting slide groove.

[0020] Optionally, the transmission mechanism includes a second connecting seat disposed on the top of the rotating shaft. The second connecting seat is rotatably engaged with the rotating shaft. Rotational limiting members are disposed on both sides of the second connecting seat along the extension direction of the cam, and the rotational limiting members can contact the outer wall of the cam.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This invention provides a capping arm and a bottle cap screwing device. A servo motor is connected to a rotating shaft via a drive gear, a driven gear, a rack gear, and a transmission gear. The rotating shaft is connected to a cap gripping head via a pressure regulating mechanism. The servo motor is a type of motor capable of precisely controlling the rotation angle, speed, and position, enabling curve control of the rotating shaft's rotation speed. This allows for precise control of the cap gripping head's rotation speed and angle, maintaining a suitable torque between the cap and the bottle body. This ensures the bottle's seal while facilitating cap opening, improving the user experience. The drive gear, driven gear, rack gear, and transmission gear adjust the transmission ratio between the servo motor and the rotating shaft, reducing the rotating shaft's speed. This allows the cap gripping head to rotate at the required speed while preventing the rotating shaft from wobbling due to excessive speed, ensuring the overall stability of the transmission mechanism. The rack gear has a certain length, ensuring it always meshes with the transmission gear during vertical movement, guaranteeing that the servo motor can always drive the rotating shaft. When the capping arm is installed on the bottle cap screwing device, the vertical movement distance of the gripping head is limited by the lifting slide of the bottle cap screwing device, making it unsuitable for bottles of various heights. In this case, the overall length of the capping arm can be changed by adjusting the length of the transmission mechanism, thus expanding the vertical movement range of the gripping head without altering the lifting slide, making it suitable for bottles of different heights and increasing the versatility of the capping arm. The pressure regulating mechanism can adjust the pressure between the cap and the bottle body, ensuring that the cap maintains a certain pressure before and during screwing. This ensures tight contact between the cap and the bottle body before screwing, improving the bottle's seal, and also allows for more even force distribution during screwing, reducing the risk of cap damage due to excessive torque. The rotating shaft and the protective sleeve, as well as the pressure regulating mechanism and the transmission mechanism, are all sealed connections, allowing the rotating shaft and pressure regulating mechanism to rotate within a sealed space, preventing dust from affecting the accuracy of the capping arm's rotation. In addition, the pressure regulating mechanism, transmission mechanism, and cap gripping head are all detachably connected, meaning that the capping arm provided by this utility model adopts a modular design, allowing workers to disassemble the various modules of the capping arm for easy replacement and maintenance. Attached Figure Description

[0023] Figure 1 A cross-sectional view of the capping arm provided by this utility model;

[0024] Figure 2 A cross-sectional view of the rotary drive mechanism of the capping arm provided by this utility model;

[0025] Figure 3 A cross-sectional view of the transmission mechanism of the capping arm provided by this utility model;

[0026] Figure 4 A cross-sectional view of the pressure adjustment mechanism of the capping arm provided by this utility model;

[0027] Figure 5 A cross-sectional view of the bottle cap screwing device provided by this utility model;

[0028] Figure 6 A schematic diagram of the structure of the cam in the bottle cap screwing device provided by this utility model;

[0029] Figure 7 A plan view of the moving path of the cap-gripping head of the bottle cap screwing device provided by this utility model;

[0030] Figure 8A for Figure 7 Cross-sectional view at point AA;

[0031] Figure 8B for Figure 7 Cross-sectional view at point BB;

[0032] Figure 8C for Figure 7 Cross-sectional view at CC;

[0033] Figure 8D for Figure 7 Cross-sectional view at point DD;

[0034] Figure 8E for Figure 7 Cross-sectional view at the EE section;

[0035] Figure 8F for Figure 7 Cross-sectional view at the middle FF section;

[0036] Figure 8G for Figure 7 Cross-sectional view at GG in the middle;

[0037] Figure 9 A cross-sectional view of the guide mechanism for the capping arm provided by this utility model;

[0038] Figure 10 for Figure 3 Cross-sectional view at HH.

[0039] in:

[0040] 100. Capping arm; 200. Support; 300. Cam; 301. Lifting slide; 3011. Lifting section; 3012. Cap gripping section; 3013. Approaching section; 3014. Capping section; 3015. Bottle inlet section; 3016. Transition section; 4001. Cap inlet path; 4002. Bottle inlet path; 4003. Bottle outlet path; 500. Bottle cap; 600. Bottle body;

[0041] 1. Rotary drive mechanism; 11. Servo motor; 12. Drive gear; 13. Driven gear; 14. Strip gear; 15. Motor mounting base; 16. Connecting shaft; 161. Second locking nut; 17. Connecting key; 18. Fourth bearing; 19. Bearing end cover;

[0042] 2. Transmission mechanism; 21. Transmission gear; 211. Transmission key; 22. Rotating shaft; 221. First locking nut; 222. Second bearing; 23. Enclosure sleeve; 231. Cantilever; 24. First connecting seat; 241. Clearance groove; 242. First bearing; 243. First mounting groove; 25. Second connecting seat; 251. Protrusion; 252. Sliding component; 253. Rotation limit component; 26. Rotation space; 261. First groove; 262. Second groove; 27. Adjusting pad; 28. Sealing component; 291. Annular pressure block; 292. First fastener; 293. Sealing groove; 294. First sealing ring;

[0043] 3. Pressure regulating mechanism; 31. Sliding sleeve; 311. Sliding keyway; 32. Sliding shaft; 321. Sliding key; 33. Elastic element; 34. Second sealing ring; 35. Connector; 36. Third bearing;

[0044] 4. Grasp the veil;

[0045] 5. Guide mechanism; 51. Telescopic tube; 52. Connecting sleeve; 53. Fifth bearing; 54. Limiting plate; 55. Third sealing ring. Detailed Implementation

[0046] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] like Figures 1 to 10 As shown, this embodiment provides a capping arm 100, which can maintain a suitable torque between the cap 500 and the bottle body 600, ensuring the bottle body's sealing while also making it easier for the user to open the cap 500, thus improving the user experience.

[0051] See Figure 1 and Figure 8D The capping arm 100 includes a rotary drive mechanism 1, a transmission mechanism 2, a pressure regulating mechanism 3, and a cap gripping head 4. The rotary drive mechanism 1 includes a servo motor 11, a drive gear 12, a driven gear 13, and a rack gear 14. The output end of the servo motor 11 is connected to the drive gear 12. The drive gear 12 meshes with the driven gear 13, and the driven gear 13 and the rack gear 14 are coaxial. The extension length of the transmission mechanism 2 is adjustable. The transmission mechanism 2 includes a transmission gear 21, a rotating shaft 22, and a protective sleeve 23. The transmission gear 21 meshes with the rack gear 14 and is connected to the rotating shaft 22. The rotating shaft 22 is rotatably disposed in the inner cavity of the protective sleeve 23 and is sealed to the protective sleeve 23. The pressure regulating mechanism 3 is detachably disposed at the bottom of the transmission mechanism 2 and is sealed to the transmission mechanism 2. The pressure regulating mechanism 3 is used to regulate the pressure between the bottle cap 500 and the bottle body 600. The cap gripping head 4 is detachably disposed at the bottom of the pressure regulating mechanism 3 and is used to grip the bottle cap 500.

[0052] The capping arm 100 provided in this embodiment has a servo motor 11 connected to a rotating shaft 22 via a drive gear 12, a driven gear 13, a rack gear 14, and a transmission gear 21. The rotating shaft 22 is connected to the cap gripping head 4 via a pressure regulating mechanism 3. The servo motor 11 is a motor capable of precisely controlling the rotation angle, speed, and position, enabling curve control of the rotational speed of the rotating shaft 22. This allows for precise control of the rotational speed and angle of the cap gripping head 4, maintaining a suitable torque between the cap 500 and the bottle body 600. This ensures the bottle's seal while facilitating the user's opening of the cap 500, improving the user experience. The arrangement of the drive gear 12, driven gear 13, rack gear 14, and transmission gear 21 adjusts the transmission ratio between the servo motor 11 and the rotating shaft 22, reducing the rotational speed of the rotating shaft 22. This allows the cap gripping head 4 to rotate at the required speed while preventing the rotating shaft 22 from wobbling due to excessive speed, ensuring the overall stability of the transmission mechanism 2. The long gear 14 has a certain length. When the transmission mechanism 2 moves up and down, the long gear 14 can always mesh with the transmission gear 21 to ensure that the servo motor 11 can always drive the rotating shaft 22 to rotate. When the capping arm 100 is installed on the cap screwing device, the lifting slide 301 of the cap screwing device limits the vertical movement distance of the cap gripping head 4, making it unsuitable for bottles of various heights. In this case, the overall length of the capping arm 100 can be changed by adjusting the length of the transmission mechanism 2, thereby expanding the vertical movement range of the cap gripping head 4 without altering the lifting slide 301, making it suitable for bottles of different heights and increasing the versatility of the capping arm 100. The pressure regulating mechanism 3 can adjust the pressure between the cap 500 and the bottle body 600, ensuring that the cap 500 maintains a certain pressure with the bottle body 600 before and during screwing. This ensures tight contact between the cap 500 and the bottle body 600 before screwing, improving the bottle's sealing performance, and also allows for more even force distribution on the cap 500 during screwing, reducing the risk of damage due to excessive torque. The rotating shaft 22 and the protective sleeve 23, as well as the pressure regulating mechanism 3 and the transmission mechanism 2, are all sealed together, allowing both to rotate within a closed space to prevent dust from affecting the accuracy of the capping arm 100's rotation. Furthermore, the pressure regulating mechanism 3 is detachably connected to the transmission mechanism 2 and the cap gripping head 4. This means the capping arm 100 provided in this embodiment adopts a modular design, allowing operators to disassemble the various modules of the capping arm 100 for easy replacement and maintenance.

[0053] For example, see Figure 3The rotating shaft 22 adopts a slender shaft design (diameter not greater than 30mm) to effectively reduce the rotational inertia of the rotating shaft 22 and reduce the impact of the rotational speed of the rotating shaft 22 on the torque control accuracy.

[0054] Specifically, see Figure 1 and Figure 2 When the servo motor 11 drives the drive gear 12 to rotate, the drive gear 12 drives the rack gear 14 to rotate via the driven gear 13. The rack gear 14 drives the rotating shaft 22 to rotate via the transmission gear 21. The rotating shaft 22 drives the pressure regulating mechanism 3 to rotate, and the pressure regulating mechanism 3 drives the cover gripper head 4 to rotate. (See reference) Figure 1 and Figure 8D When the torque between the bottle cap 500 and the bottle body 600 is about to reach the preset torque, the servo motor 11 controls the rotation speed of the rotating shaft 22 to decrease; see reference Figure 1 and Figure 8E When the torque between the bottle cap 500 and the bottle body 600 reaches the preset torque, the servo motor 11 controls the rotating shaft 22 to stop rotating immediately.

[0055] For example, see Figure 3 A transmission keyway (not shown in the figure) is provided on the rotating shaft 22, and a transmission key 211 is provided on the transmission gear 21. The transmission key 211 is locked in the transmission keyway. When the transmission gear 21 rotates, it can drive the rotating shaft 22 to rotate through the transmission key 211, thus realizing the synchronous rotation of the transmission gear 21 and the rotating shaft 22.

[0056] See Figure 1 The connection methods between the rotating shaft 22 and the pressure regulating mechanism 3, as well as the connection methods between the pressure regulating mechanism 3 and the gripping head 4, are conventional technical means in this field and will not be described in detail here.

[0057] Optionally, see Figure 3The transmission mechanism 2 also includes a first connecting seat 24 and a second connecting seat 25. The first connecting seat 24 is disposed on the top of the enclosure sleeve 23 and is sealed to the enclosure sleeve 23. The transmission gear 21 is rotatably disposed on the first connecting seat 24. The second connecting seat 25 is disposed on the top of the first connecting seat 24 and is detachably connected to the first connecting seat 24. A closed rotation space 26 is formed between the second connecting seat 25 and the first connecting seat 24. The top end of the rotating shaft 22 passes through the first connecting seat 24 and extends into the rotation space 26. The rotating shaft 22 is rotatably connected to the first connecting seat 24. The distance between the first connecting seat 24 and the second connecting seat 25 is adjustable. This configuration ensures that the extension length of the transmission mechanism 2 is adjustable while still keeping the rotating shaft 22 in a sealed space, preventing dust from entering the inner cavity of the enclosure sleeve 23 and affecting the rotation of the rotating shaft 22. The detachable connection between the first connecting seat 24 and the second connecting seat 25 facilitates changing the distance between them. That is, the distance can be adjusted after separating the first connecting seat 24 and the second connecting seat 25, making the operation convenient and quick.

[0058] In this embodiment, see Figure 1 and Figure 3 The transmission mechanism 2 also includes several adjusting pads 27, which are sandwiched between the first connecting seat 24 and the second connecting seat 25. By adjusting the number of adjusting pads 27 sandwiched between the first connecting seat 24 and the second connecting seat 25, the distance between the first connecting seat 24 and the second connecting seat 25 can be changed, thereby adjusting the extension length of the transmission mechanism 2. Specifically, by separating the first connecting seat 24 and the second connecting seat 25, the adjusting pads 27 can be placed between the first connecting seat 24 and the second connecting seat 25 or removed from between the first connecting seat 24 and the second connecting seat 25, thus adjusting the distance between the first connecting seat 24 and the second connecting seat 25. In addition, the setting of adjusting pads 27 can also reduce the production accuracy requirements of the rotating shaft 22 and the pressure adjusting mechanism 3 along their extension direction, reducing the production difficulty of the capping arm 100.

[0059] Specifically, see Figure 3 In the orientation of the first connecting seat 24, the adjusting pad 27 is sandwiched between the bottom surface of the second connecting seat 25 and the top surface of the first connecting seat 24. The top of the first connecting seat 24 is provided with a downwardly recessed first groove 261, and the bottom of the second connecting seat 25 is provided with a protrusion 251. The protrusion 251 has an upwardly recessed second groove 262. The protrusion 251 is inserted into the first groove 261. The first groove 261 and the second groove 262 together form the rotation space 26. When the number of adjusting pads 27 changes, the length of the protrusion 251 inserted into the first groove 261 changes, so that the rotation space 26 can always be kept in a sealed state regardless of how the distance between the first connecting seat 24 and the second connecting seat 25 changes.

[0060] Further, see Figure 1 and Figure 3 The rotary drive mechanism 1 is located on one side of the transmission mechanism 2 along the horizontal direction. The first connecting seat 24 is provided with a relief groove 241 on the side facing the rotary drive mechanism 1 to avoid collision between the first connecting seat 24 and the rotary drive mechanism 1, thus ensuring the safety of the cap arm 100 structure and the smooth operation of the rotary drive mechanism 1.

[0061] For example, see Figure 3 A first bearing 242 is provided on the first connecting seat 24 to reduce the friction between the first connecting seat 24 and the rotating shaft 22, so that the rotating shaft 22 can rotate smoothly.

[0062] For example, see Figure 3 A second bearing 222 is provided at the bottom of the rotating shaft 22, and the rotating shaft 22 is rotatably connected to the enclosure sleeve 23 through the second bearing 222. Furthermore, the rotating shaft 22 is provided with a stepped surface and a first locking nut 221 threadedly connected to it. The second bearing 222 is located on the stepped surface, and the first locking nut 221 is located on the side of the second bearing 222 facing away from the stepped surface. The stepped surface and the first locking nut 221 restrict the displacement of the second bearing 222 along the axial direction of the rotating shaft 22, ensuring the stability of the second bearing 222 installed on the rotating shaft 22.

[0063] For example, see Figure 3 The first connecting seat 24 is provided with a first mounting groove 243, and the transmission gear 21 is installed in the first mounting groove 243 and is in clearance fit with the groove wall of the first mounting groove 243 to avoid the first mounting groove 243 affecting the rotation of the transmission gear 21.

[0064] For example, the first connecting seat 24 can be sealed between the enclosure sleeve 23 using a rubber ring.

[0065] In this embodiment, see Figure 3 The transmission mechanism 2 also includes a sealing member 28 disposed at the bottom of the enclosure sleeve 23. The sealing member 28 is used to seal the enclosure sleeve 23. The rotating shaft 22 passes through the sealing member 28 and is sealed to the enclosure sleeve 23 through the sealing member 28.

[0066] Specifically, see Figure 3 The inner cavity of the protective sleeve 23 is also provided with an annular pressure block 291. The annular pressure block 291 is connected to the sealing member 28 by a first fastener 292. A sealing groove 293 is formed between the annular pressure block 291, the sealing member 28 and the rotating shaft 22. A first sealing ring 294 is provided in the sealing groove 293. The sealing member 28 and the rotating shaft 22 are sealed and connected by the first sealing ring 294.

[0067] For example, the first sealing ring 294 is a rubber ring, and the first fastener 292 is a pin, which passes through the sealing member 28 and is fastened to the annular pressure block 291.

[0068] Optionally, see Figure 4 and Figure 8C The pressure regulating mechanism 3 includes a sliding sleeve 31, a sliding shaft 32, and an elastic element 33. The cap gripping head 4 is detachably mounted on the bottom of the sliding shaft 32. The rotating shaft 22 is detachably connected to the top of the sliding sleeve 31. The sliding sleeve 31 is fitted onto the sliding shaft 32 and slides in cooperation with it. The elastic element 33 is elastically limited between the top of the sliding sleeve 31 and the bottom of the sliding shaft 32. When the sliding sleeve 31 slides relative to the sliding shaft 32, the elastic element 33 accumulates elastic potential energy. During the twisting process, the bottle body 600 is located below the bottle cap 500. When the cap gripping head 4 drives the bottle cap 500 to just make contact with the bottle body 600 before twisting begins, it drives the transmission mechanism 2 to move downward. The transmission mechanism 2 drives the sliding sleeve 31 to slide downward, causing the elastic element 33 to deform and accumulate elastic potential energy. The accumulated elastic potential energy acts on the cap gripping head 4 through the sliding shaft 32, thereby ensuring that there is a certain pressure between the bottle cap 500 and the bottle body 600 before and during twisting.

[0069] For example, the elastic element 33 is a spring.

[0070] Specifically, see Figure 4 A second sealing ring 34 is provided between the sliding sleeve 31 and the rotating shaft 22 to seal the gap between them and prevent dust from entering and affecting the effect of the rotating shaft 22 in driving the pressure regulating mechanism 3 to rotate. For example, the second sealing ring 34 is a rubber ring.

[0071] Further, see Figure 4 The bottom of the sliding shaft 32 is provided with a connector 35 that can be detachably connected to it. The cross-sectional width of the connector 35 is larger than that of the sliding shaft 32. The sliding shaft 32 is connected to the cap gripping head 4 through the connector 35. The connector 35 increases the contact area between the pressure regulating mechanism 3 and the cap gripping head 4, making it easier to connect the cap gripping head 4 and the pressure regulating mechanism 3.

[0072] For example, the sliding shaft 32 is connected to the connector 35 by bolts.

[0073] In this embodiment, see Figure 4A sliding key 321 is provided on one of the sliding sleeve 31 and the sliding shaft 32, and a sliding keyway 311 extending axially along the sliding shaft 32 is provided on the other of the two. The sliding key 321 is embedded in and slidably engages with the sliding keyway 311, so that the sliding sleeve 31 can both slide relative to the sliding shaft 32 and drive the sliding shaft 32 to rotate. For details, see [reference needed]. Figure 4 The sliding key 321 is set on the sliding shaft 32, and the sliding keyway 311 is set on the sliding sleeve 31. The rotating shaft 22 drives the sliding sleeve 31 to rotate, and the sliding sleeve 31 drives the sliding shaft 32 to rotate through the sliding key 321, and the sliding shaft 32 drives the gripping head 4 to rotate.

[0074] For example, see Figure 4 The sliding key 321 is made of high-hardness (hardness greater than 50) metal. Compared with keys made of plastic, the sliding key 321 made of high-hardness metal can reduce its size and processing difficulty while meeting the same load-bearing torque, thereby reducing production costs.

[0075] Further, see Figure 4 A plurality of third bearings 36 are provided between the sliding sleeve 31 and the sliding shaft 32. The plurality of third bearings 36 are spaced apart along the axial direction of the sliding shaft 32 to reduce the friction between the sliding shaft 32 and the sliding sleeve 31, so that the sliding sleeve 31 can slide smoothly. For example, the third bearings 36 are plastic sliding bearings.

[0076] Optionally, see Figure 2 The rotary drive mechanism 1 also includes a motor mounting base 15 and a connecting shaft 16. The servo motor 11 is detachably mounted on the motor mounting base 15, and the connecting shaft 16 is rotatably mounted on the motor mounting base 15. The connecting shaft 16 passes through the driven gear 13 and the rack gear 14. The connecting shaft 16 can transmit the torque between the driven gear 13 and the rack gear 14 so that the driven gear 13 and the rack gear 14 can rotate synchronously.

[0077] Specifically, see Figure 2 The connecting shaft 16 is provided with a connecting keyway (not shown in the figure) extending vertically. Both the driven gear 13 and the rack gear 14 are provided with connecting keys 17, which are embedded in the connecting keyway. When the driven gear 13 rotates, it drives the connecting shaft 16 to rotate through the connecting key 17 and the connecting keyway on the connecting shaft 16. The connecting shaft 16 drives the rack gear 14 to rotate through the connecting keyway and the connecting key 17 on the rack gear 14.

[0078] In this embodiment, see Figure 2A second locking nut 161 is provided on the connecting shaft 16 and is threadedly connected thereto. The second locking nut 161 abuts against the end of the rack gear 14 that is away from the driven gear 13, so as to prevent the rack gear 14 from moving on the connecting shaft 16 and to limit the rack gear 14.

[0079] For example, see Figure 2 The connecting shaft 16 and the motor mounting base 15 are rotatably connected by a fourth bearing 18. Specifically, a fourth bearing 18 is provided at both ends of the connecting shaft 16, and a bearing end cover 19 fixedly connected to the motor mounting base 15 is provided at the top of the connecting shaft 16. The fourth bearing 18 located at the top of the connecting shaft 16 is sandwiched between the bearing end cover 19 and the driven gear 13 to prevent the bearing located at the top of the connecting shaft 16 from detaching from the connecting shaft 16.

[0080] Furthermore, the servo motor 11 is secured to the motor connector using a second fastener to ensure the servo motor 11 is firmly installed on the motor connector. For example, the second fastener is a bolt.

[0081] Example 2

[0082] like Figures 5 to 10As shown, this embodiment provides a bottle cap screwing device, including a bracket 200, a cam 300, and several capping arms 100 as in Embodiment 1. The cam 300 is disposed on the bracket 200, and the bracket 200 is rotatable relative to the cam 300. The cam 300 is provided with a lifting groove 301 extending circumferentially therefrom. The lifting groove 301 includes several rising sections 3011, several descending sections, and several horizontal sections. Several capping arms 100 are spaced apart on the bracket 200 circumferentially along the cam 300 and are detachably connected to the bracket 200. The transmission mechanism 2 of the capping arm 100 slides in cooperation with the lifting groove 301, and the transmission mechanism 2 is movably inserted through the bracket 200 in the vertical direction. Driving the bracket 200 to rotate relative to the cam 300, the bracket 200 drives the capping arms 100 to move along the extending direction of the lifting groove 301 to complete the screwing of the bottle cap 500 and the bottle body 600. Specifically, when the transmission mechanism 2 moves to the horizontal section of the lifting slide 301, the height of the cap gripping head 4 remains unchanged. At this time, the distance between the bottle cap 500 and the bottle body 600 remains unchanged, and the bottle body 600 can gradually move to below the bottle cap 500. When the transmission mechanism 2 moves to the descending section of the lifting slide 301, the transmission mechanism 2 drives the cap gripping head 4 to move downward. At this time, the bottle cap 500 gradually approaches the bottle body 600, or the bottle cap 500 generates pressure with the bottle body 600 under the action of the pressure regulating mechanism 3. Moreover, after the bottle cap 500 contacts the bottle body 600, the servo motor 11 is activated during the downward movement of the bottle cap 500 to drive the cap gripping head 4 to rotate the bottle cap 500, thus completing the screwing of the bottle cap 500 and the bottle body 600. When the transmission mechanism 2 moves to the ascending section of the lifting slide 301, the lifting slide 301 drives the transmission mechanism 2 to move upward. At this time, the cap gripping head 4 can separate from the bottle cap 500, thereby completing the packaging of a bottle.

[0083] In this embodiment, see Figure 7 The descending section includes a cap-grabbing section 3012, a proximity section 3013, and a cap-screwing section 3014. The horizontal section includes a bottle-infeeding section 3015 and a transition section 3016. The cap-grabbing section 3012, bottle-infeeding section 3015, proximity section 3013, cap-screwing section 3014, ascending section 3011, and transition section 3016 are connected sequentially. The end of the transition section 3016 furthest from the ascending section 3011 is connected to the cap-grabbing section 3012. (See also...) Figure 5 and Figure 7 This drives the support 200 to rotate in the X direction. (See reference) Figure 8A and Figure 8B The cap-grabbing head 4 descends in the cap-grabbing section 3012, and the bottle cap 500 enters the cap-screwing device along the cap-entry path 4001. The cap-grabbing head 4 gradually contacts and locks the bottle cap 500. (See also...) Figure 8CThe cap-grabbing head 4 moves the bottle cap 500 to the inlet section 3015. The bottle body 600 enters the cap-screwing device along the inlet path 4002 and rotates synchronously with the bottle cap 500. At this time, the bottle body 600 is directly below the bottle cap 500. (See also...) Figure 8D The cap-grabbing head 4 moves the bottle cap 500 downwards in the approach section 3013, gradually bringing it closer to and into contact with the bottle body 600. The transmission mechanism 2 continues to move downwards in the approach section 3013, causing the elastic element 33 to deform, creating pressure between the bottle cap 500 and the bottle body 600. This drives the support 200 to continue rotating, and the transmission mechanism 2 enters the capping section 3014. The cap-grabbing head 4 continues to move the bottle cap 500 downwards, and simultaneously, the servo motor 11 is activated, causing the cap-grabbing head 4 to rotate the bottle cap 500. (See reference...) Figure 8E The bottle cap 500 and bottle body 600 are gradually screwed together; when the transmission mechanism 2 moves to the intersection of the capping section 3014 and the rising section 3011, the servo motor 11 is turned off, and a suitable torque is maintained between the bottle cap 500 and the bottle body 600; in the rising section 3011, the transmission mechanism 2 drives the cap gripping head 4 to move upward, see reference. Figure 8F The cap-grabbing head 4 gradually separates from the bottle cap 500, and the separated bottle body is removed from the cap screwing device along the bottle exit path 4003; subsequently, refer to Figure 8G The cap-grabbing head 4 moves from the rising section 3011 to the cap-grabbing section 3012 via the transition section 3016 to screw on the next cap 500. The methods by which the cap-grabbing head 4 grasps the cap 500 and separates from it are common techniques in the art and will not be described in detail here.

[0084] Optionally, see Figure 1 and Figure 5 The enclosure sleeve 23 includes a cantilever portion 231 extending outside the bracket 200. The capping arm 100 also includes a guide mechanism 5 with an adjustable extension length. The guide mechanism 5 is sleeved on the cantilever portion 231 and sealed to the bottom end of the cantilever portion 231. The guide mechanism 5 is detachably connected to the bracket 200. The enclosure sleeve 23 has a relatively long vertical extension length. The portion of the enclosure sleeve 23 that passes through the bracket 200 can be constrained by the bracket 200, but the cantilever portion 231 extending outside the bracket 200 cannot be constrained by the bracket 200. The guide mechanism 5 prevents the cantilever portion 231 from swinging when the rotating shaft 22 rotates, ensuring the stability of the capping arm 100 installed on the bracket 200. In addition, the extension length of the guide mechanism 5 is adjustable, so that when the transmission mechanism 2 moves up and down, that is, when the length of the cantilever portion 231 changes, the guide mechanism 5 can cooperate with the change in the length of the cantilever portion 231.

[0085] Specifically, see Figure 5 and Figure 9The guide mechanism 5 includes a telescopic tube 51 and a connecting sleeve 52. One end of the connecting sleeve 52 is detachably connected to the bracket 200, and the other end is fixedly connected to the telescopic tube 51. The end of the telescopic tube 51 away from the connecting sleeve 52 is sealed to the bottom end of the cantilever portion 231. The cantilever portion 231 passes through the connecting sleeve 52 and the telescopic tube 51, and slides against the inner wall of the connecting sleeve 52. The cantilever portion 231 also has a clearance fit with the inner wall of the telescopic tube 51. When the transmission mechanism 2 moves up and down under the influence of the lifting slide 301, the length of the cantilever portion 231 changes, and the cantilever portion 231 slides vertically relative to the connecting sleeve 52. At the same time, the cantilever portion 231 can drive the telescopic tube 51 to extend and retract, so that the guide mechanism 5 can restrict the swing of the cantilever portion 231 while still cooperating with the vertical movement of the connecting sleeve 52.

[0086] For example, the connecting sleeve 52 is detachably connected to the bracket 200 by bolts, and the telescopic tube 51 is a corrugated tube. The corrugated tube is welded to the bottom of the connecting sleeve 52 and the cantilever 231. The welded connection can also ensure the sealing of the connection between the corrugated tube and the cantilever 231.

[0087] In this embodiment, see Figure 5 and Figure 9 A fifth bearing 53 is provided between the connecting sleeve 52 and the cantilever 231 to reduce the friction between the cantilever 231 and the connecting sleeve 52 when the cantilever 231 moves vertically, so that the cantilever 231 can slide vertically relative to the connecting sleeve 52.

[0088] For example, the fifth bearing 53 is a sliding bearing.

[0089] Specifically, see Figure 5 and Figure 9 The inner wall of the connecting sleeve 52 is provided with a second mounting groove (not shown in the figure), and the fifth bearing 53 is installed in the second mounting groove to prevent the cantilever portion 231 from driving the fifth bearing 53 to move vertically. Further, see [reference needed]. Figure 9 The top surface of the fifth bearing 53 is flush with the top surface of the connecting sleeve 52. The guide mechanism 5 also includes a limiting plate 54 disposed on the top of the connecting sleeve 52 to prevent the cantilever 231 from driving the fifth bearing 53 to move upward and disengage from the second mounting groove.

[0090] Further, see Figure 5 and Figure 9 A third sealing ring 55 is also provided between the connecting sleeve 52 and the bracket 200 to ensure a sealed connection between the connecting sleeve 52 and the bracket 200, preventing dust from entering the connecting sleeve 52 and affecting the sliding of the cantilever portion 231. For example, the third sealing ring 55 is a rubber ring.

[0091] Optionally, see Figure 1 , Figure 6 and Figure 10 The transmission mechanism 2 includes a second connecting seat 25 disposed on the top of the rotating shaft 22. The second connecting seat 25 is rotatably engaged with the rotating shaft 22. A sliding member 252 is disposed on the second connecting seat 25, and the sliding member 252 is slidably engaged with the lifting slide 301, so that the transmission mechanism 2 can slide along the lifting slide 301 to realize the vertical movement of the transmission mechanism 2. The sliding member 252 is disposed on the second connecting seat 25. When the servo motor 11 drives the rotating shaft 22 to rotate, the second connecting seat 25 does not rotate, so as to avoid collision between the second connecting seat 25 and the cam 300, and ensure the stability and safety of the bottle cap screwing device during the bottle cap screwing process.

[0092] For example, the sliding member 252 adopts a shaft bearing, the bearing of the shaft bearing is slidably engaged with the lifting slide 301, and the shaft of the shaft bearing is fixed on the second connecting seat 25.

[0093] Optionally, see Figure 3 and Figure 10 The second connecting seat 25 is provided with rotation limiting members 253 on both sides along the extension direction of the cam 300. The rotation limiting members 253 can contact the outer wall of the cam 300 to prevent the second connecting seat 25 from rotating when the rotating shaft 22 rotates.

[0094] For example, see Figure 10 The rotation limiter 253 is a flat plate structure and is connected to the second connecting seat 25 by bolts.

[0095] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A spin cap arm (100) characterized by, The utility model relates to a bottle cap grabbing device, comprising: a rotating drive mechanism (1) comprising a servo motor (11), a driving gear (12), a driven gear (13) and a long gear (14), the output end of the servo motor (11) is connected with the driving gear (12), the driving gear (12) is engaged with the driven gear (13), the driven gear (13) and the long gear (14) are coaxial; a transmission mechanism (2) with adjustable extension length, the transmission mechanism (2) comprising a transmission gear (21), a rotating shaft (22) and a surrounding sleeve (23), the transmission gear (21) is engaged with the long gear (14) and connected with the rotating shaft (22), the rotating shaft (22) is rotatably arranged in the inner cavity of the surrounding sleeve (23) and sealingly connected with the surrounding sleeve (23); a pressure adjusting mechanism (3) which is detachably arranged at the bottom of the transmission mechanism (2) and sealingly connected with the transmission mechanism (2), the pressure adjusting mechanism (3) is used for adjusting the pressure between the bottle cap (500) and the bottle body (600); a cap grabbing head (4) which is detachably arranged at the bottom of the pressure adjusting mechanism (3) and used for grabbing the bottle cap (500).

2. The spin-on lid arm (100) of claim 1, wherein, The transmission mechanism (2) further comprises a first connecting seat (24) and a second connecting seat (25), the first connecting seat (24) is arranged at the top of the surrounding sleeve (23) and sealingly connected with the surrounding sleeve (23), the transmission gear (21) is rotatably arranged in the first connecting seat (24), the second connecting seat (25) is arranged at the top of the first connecting seat (24) and detachably connected with the first connecting seat (24), a closed rotating space (26) is formed between the second connecting seat (25) and the first connecting seat (24), the top end of the rotating shaft (22) penetrates through the first connecting seat (24) and extends into the rotating space (26), the rotating shaft (22) is rotatably connected with the first connecting seat (24), and the distance between the first connecting seat (24) and the second connecting seat (25) is adjustable.

3. The spin-cup arm (100) of claim 2, wherein, The transmission mechanism (2) further comprises a plurality of adjusting pads (27), the adjusting pads (27) are clamped between the first connecting seat (24) and the second connecting seat (25).

4. The spin-cup arm (100) of claim 1, wherein, The pressure adjusting mechanism (3) comprises a sliding sleeve (31), a sliding shaft (32) and an elastic member (33), the cap grabbing head (4) is detachably arranged at the bottom of the sliding shaft (32), the rotating shaft (22) is detachably connected with the top of the sliding sleeve (31), the sliding sleeve (31) is sleeved on the sliding shaft (32) and slidably matched with the sliding shaft (32), the elastic member (33) is elastically limited between the top of the sliding sleeve (31) and the bottom of the sliding shaft (32), and when the sliding sleeve (31) slides relative to the sliding shaft (32), the elastic member (33) accumulates elastic potential energy.

5. The spin-cup arm (100) of claim 4, wherein, A sliding key (321) is arranged on one of the sliding sleeve (31) and the sliding shaft (32), and a sliding key groove (311) extending axially along the sliding shaft (32) is arranged on the other one of the sliding sleeve (31) and the sliding shaft (32), and the sliding key (321) is embedded in and slidingly matched with the sliding key groove (311).

6. A bottle cap screwing device characterized by comprising: The cap rotating device comprises a support (200), a cam (300) and a plurality of cap rotating arms (100) according to any one of claims 1-5, the cam (300) is arranged on the support (200), and the support (200) is rotatable relative to the cam (300), the cam (300) is provided with a lifting slide groove (301) extending along the circumference thereof, the lifting slide groove (301) comprises a plurality of ascending sections (3011), a plurality of descending sections and a plurality of horizontal sections, a plurality of the cap rotating arms (100) are arranged on the support (200) along the circumference of the cam (300) and are detachably connected with the support (200), the transmission mechanism (2) of the cap rotating arm (100) is slidingly matched with the lifting slide groove (301), and the transmission mechanism (2) is movably arranged in the support (200) in the vertical direction.

7. The bottle cap screwing device according to claim 6, characterized by The enclosure sleeve (23) comprises a cantilever portion (231) extending to the outside of the support (200), the cap rotating arm (100) further comprises a guide mechanism (5) with adjustable extension length, the guide mechanism (5) is sleeved on the cantilever portion (231) and is sealingly connected with the bottom end of the cantilever portion (231), and the guide mechanism (5) is detachably connected with the support (200).

8. The bottle cap screwing device according to claim 7, characterized in that, The guide mechanism (5) comprises a telescopic tube (51) and a connecting sleeve (52), one end of the connecting sleeve (52) is detachably connected with the support (200), the other end is fixedly connected with the telescopic tube (51), the end of the telescopic tube (51) away from the connecting sleeve (52) is sealingly connected with the bottom end of the cantilever portion (231), the cantilever portion (231) is arranged in the connecting sleeve (52) and the telescopic tube (51) and is slidingly matched with the inner wall of the connecting sleeve (52), and the cantilever portion (231) is clearance-fitted with the inner wall of the telescopic tube (51).

9. The bottle cap screwing device according to claim 6, characterized by The transmission mechanism (2) comprises a second connecting seat (25) arranged on the top of the rotating shaft (22), the second connecting seat (25) is rotationally matched with the rotating shaft (22), and the second connecting seat (25) is provided with a sliding piece (252) slidingly matched with the lifting slide groove (301).

10. The bottle cap screwing device according to claim 6, characterized in that, The transmission mechanism (2) comprises a second connecting seat (25) arranged at the top of the rotating shaft (22), the second connecting seat (25) is in rotation fit with the rotating shaft (22), and rotating limiting pieces (253) are arranged on both sides of the second connecting seat (25) in the extension direction of the cam (300), and the rotating limiting pieces (253) can be in contact with the outer wall of the cam (300).

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