Bottle clamping mechanism and cap screwing machine

Abstract

The utility model belongs to beverage filling equipment technical field discloses a kind of bottle clamping mechanism and cap screwing machine, including clamping assembly, drive assembly and open clamping assembly, clamping assembly includes stop rotation piece, first jaw and second jaw;Drive assembly includes transmission bracket, spring and gyro wheel, one end of transmission bracket is provided with driving gear, the other end of transmission bracket is connected with gyro wheel by spring, driving gear can drive stop rotation piece, first jaw and second jaw mutually equidistantly approach or away along the radial direction of bottle mouth;Open clamping assembly includes cam, when gyro wheel movement reaches the abutment of open clamping section of cam, stop rotation piece, first jaw and second jaw mutually away, when gyro wheel movement reaches the closure section of cam, stop rotation piece, first jaw and second jaw mutually approach.The bottle clamping mechanism and cap screwing machine of the utility model can be adjusted simply to adapt to different kinds of size bottle cap screwing operation and keep bottle transmission center unchanged, with high efficiency and low cost.

Description

Technical Field

[0001] This utility model relates to the field of beverage filling equipment technology, and in particular to a bottle clamping mechanism capping machine. Background Technology

[0002] With the development of the beverage market, in order to attract consumers' attention and promote the sales of beverage products, beverage companies have launched more and more types of bottles, including those with the same bottle opening but different bottle bodies, those with the same bottle opening and shape but different volumes, and those with different bottle openings and different bottle bodies.

[0003] In beverage bottling, capping machines are used to tighten or loosen bottle caps. In existing capping machines, changing to handle different bottle types requires replacing different conveying components, such as clamping assemblies, to ensure the machine can hold the corresponding bottle type. Currently, if the clamping assembly needs replacement, workers must use tools to unscrew the screws and other structural elements of the existing assembly, disassemble it, select the appropriate new assembly, and then retighten the screws and other structural elements. This existing technology has the following drawbacks: Completely disassembling the clamping assembly is not only time-consuming and labor-intensive, but also causes mechanical damage to the equipment, such as thread wear, thus affecting its lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a bottle clamping mechanism and a capping machine, which can adapt to the capping operation of bottles of different sizes and keep the bottle transfer center unchanged. It is simple and convenient to operate, highly efficient and low cost.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, a bottle clamping mechanism is provided, including a clamping component, a driving component, and an opening component. The clamping component includes an anti-rotation member, a first gripper, and a second gripper that rotatably engages with the first gripper.

[0007] The drive assembly includes a transmission bracket, a spring, and a roller. One end of the transmission bracket is provided with a drive gear, and the other end of the transmission bracket is connected to the roller through the spring. The drive gear is respectively connected to the anti-rotation member and the first gripper to drive the anti-rotation member, the first gripper, and the second gripper to move closer or further away from each other at equal distances along the radial direction of the bottle opening.

[0008] The clamping assembly includes a cam located on the movement trajectory of the roller. The cam has an opening section and a closing section. When the roller moves to the opening section of the cam and abuts, the anti-rotation member, the first jaw, and the second jaw move away from each other. When the roller moves to the closing section of the cam, the anti-rotation member, the first jaw, and the second jaw move closer to each other.

[0009] In one embodiment, the first gripper includes a first chuck and a first transmission gear connected to each other, and the second gripper includes a second chuck and a second transmission gear connected to each other, wherein the first transmission gear meshes with the drive gear and the second transmission gear respectively.

[0010] In one embodiment, the driving gear includes a driving gear shaft and a gear body that rotates around the driving gear shaft. The gear body is provided with a first tooth portion that meshes with the first transmission gear and a second tooth portion that meshes with the rack of the anti-rotation member.

[0011] In one embodiment, the transmission ratio between the drive gear and the first gripper, the transmission ratio between the drive gear and the anti-rotation member, and the transmission ratio between the first gripper and the first gripper are all the same.

[0012] In one embodiment, the clamping assembly further includes an adjusting base, on which an adjusting screw is rotatably connected. The cam is threadedly connected to the adjusting screw. The adjusting screw rotates and drives the cam to move along the axial direction of the adjusting screw, so as to adjust the initial contact position between the cam and the roller and the separation position between the cam and the roller.

[0013] In one embodiment, the adjusting base is further provided with an adjusting wheel that is kinetically connected to the adjusting screw, and the adjusting wheel drives the adjusting screw to rotate.

[0014] In one embodiment, the drive assembly further includes a gear holder connected to the transmission bracket, and a sleeve bearing is disposed within the gear holder, with the drive gear embedded within the sleeve bearing.

[0015] In one embodiment, the clamping assembly further includes a slider, the cam is fixed on the slider, and the slider has a threaded hole that is threadedly connected to the adjusting screw.

[0016] In one embodiment, the clamping assembly further includes an anti-rotation guide seat, the anti-rotation guide seat having a guide groove, the anti-rotation member being movably disposed within the guide groove, the guide groove having a transmission opening on one side wall facing the drive gear, and the rack of the anti-rotation member extending out of the transmission opening and meshing with the drive gear.

[0017] In one embodiment, a cutting head is provided at the end of the anti-rotation member away from the anti-rotation member guide seat, and the cutting head partially penetrates the bottle mouth when it is pressed against the bottle mouth.

[0018] On the other hand, a capping machine is also provided, including a machine body and the above-mentioned bottle clamping mechanism. A turntable is rotatably arranged on the machine body. The clamping component and the driving component are arranged on the turntable. A bottle inlet junction point is provided on the turntable near the external bottle inlet unit. A bottle outlet junction point is provided on the turntable near the external bottle outlet unit.

[0019] The clamping assembly is mounted on the machine body. There are two sets of clamping assemblies, one set of which is located near the bottle inlet junction point, and the other set of which is located near the bottle outlet junction point.

[0020] The beneficial effects of this utility model are:

[0021] This invention discloses a bottle clamping mechanism. A cam applies external force to a roller, causing the roller to move away from its trajectory when it reaches the open clamping section of the cam. This movement, via a transmission bracket, drives a drive gear to rotate. At this point, the drive gear drives an anti-rotation component, a first gripper, and a second gripper to move equidistantly away from each other along the radial direction of the bottle opening, allowing the bottle opening to be inserted. When the roller reaches the closed section of the cam, it moves closer to its trajectory, again driving the drive gear to rotate. This drive gear then drives the anti-rotation component, the first gripper, and the second gripper to move closer together equidistantly along the radial direction of the bottle opening, clamping the bottle opening tightly.

[0022] Specifically, based on the principle that three points determine a circle, when the drive gear drives the anti-rotation component, the first gripper, and the second gripper to approach each other with the same displacement, the three points controlling the clamping of the bottle mouth change simultaneously, so that the anti-rotation component, the first gripper, and the second gripper simultaneously abut against the bottle mouth and clamp it. Furthermore, when clamping bottles of different sizes, it ensures that the center position of the bottle mouth remains unchanged, that is, it ensures that the transfer center of the bottle remains unchanged, thus ensuring the smoothness of the overall operation.

[0023] Furthermore, by adjusting the base, the position of the cam can be adjusted, thereby adjusting the contact time and position between the adjusting roller and the cam, and thus adjusting the opening and closing size and time of the first and second grippers to accommodate bottle mouths of different sizes. In this invention, no parts or structures need to be replaced; simply adjusting the cam position is sufficient to clamp bottle mouths of different sizes, adapting to the production needs of bottles of various sizes. The operation is simple, efficient, and low-cost. Attached Figure Description

[0024] Figure 1This is a partial structural schematic diagram of the bottle clamping mechanism in one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0026] Figure 3 This is a schematic diagram of the clamping component in the open state in this embodiment;

[0027] Figure 4 This is a schematic diagram of the clamping component in the closed state in this embodiment;

[0028] Figure 5 See Figure 4 Enlarged structural diagram of section B in the middle;

[0029] Figure 6 This is a comparative diagram of the clamping of bottles of different sizes in this embodiment;

[0030] Figure 7 This is a partial structural diagram of the capping machine in this embodiment.

[0031] In the picture:

[0032] 1. Bottle; 11. Bottle neck; 2. Bottle inlet unit; 3. Bottle outlet unit;

[0033] 100. Clamping assembly; 110. Anti-rotation component; 111. Rack; 112. Cutting head; 120. First gripper; 121. First chuck; 122. First transmission gear; 130. Second gripper; 131. Second chuck; 132. Second transmission gear; 140. Anti-rotation component guide seat; 200. Drive assembly; 210. Transmission bracket; 220. Spring; 230. Roller; 240. Drive gear; 24. 1. Gear body; 242. First tooth; 243. Second tooth; 250. Gear fixing seat; 251. Sleeve bearing; 300. Clamping assembly; 310. Adjusting base; 320. Cam; 321. Clamping section; 322. Closing section; 330. Adjusting screw; 340. Adjusting wheel; 350. Slider; 400. Machine body; 410. Turntable; 411. Bottle inlet junction point; 412. Bottle outlet junction point. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figures 1 to 6 As shown, a bottle clamping mechanism in this embodiment includes a clamping assembly 100, a driving assembly 200, and an opening assembly 300. The clamping assembly 100 includes an anti-rotation member 110, a first gripper 120, and a second gripper 130 that rotatably engages with the first gripper 120. The driving assembly 200 includes a transmission bracket 210, a spring 220, and a roller 230. One end of the transmission bracket 210 is provided with a drive gear 240, and the other end of the transmission bracket 210 is connected to the roller 230 via the spring 220. The drive gear 240 is driven to the anti-rotation member 110 and the first gripper 120, respectively, to drive the anti-rotation member 110, the first gripper 120, and the second gripper 130 to move closer or further apart from each other at equal distances along the radial direction of the bottle opening 11. The drive gear 240 drives the first gripper 120 to rotate, and then the first gripper 120 drives the second gripper 130 to rotate synchronously.

[0039] The clamping assembly 300 includes a cam 320, which is located on the movement trajectory of the roller 230. The cam 320 is provided with an opening section 321 and a closing section 322. When the roller 230 moves to the opening section 321 of the cam 320, the anti-rotation member 110, the first jaw 120 and the second jaw 130 move away from each other. When the roller 230 moves to the closing section 322 of the cam 320, the anti-rotation member 110, the first jaw 120 and the second jaw 130 move closer to each other.

[0040] In this embodiment, the cam 320 applies an external force to the roller 230, causing the roller 230 to move away from its trajectory when it reaches the opening section 321 of the cam 320. This movement, via the transmission bracket 210, drives the drive gear 240 to rotate. Figure 3 The drive gear 240 rotates counterclockwise, driving the anti-rotation member 110, the first gripper 120, and the second gripper 130 to move equidistantly away from each other radially from the bottle opening 11, allowing the bottle opening 11 to be inserted. When the roller 230 moves to the closed section 322 of the cam 320, the roller 230 moves towards its trajectory and drives the drive gear 240 to rotate via the transmission bracket 210, i.e. Figure 4 The drive gear 240 rotates clockwise. At this time, the drive gear 240 drives the anti-rotation member 110, the first gripper 120 and the second gripper 130 to approach each other at equal distances along the radial direction of the bottle mouth 11 so as to clamp the bottle mouth 11.

[0041] Specifically, such as Figure 6 As shown, based on the principle that three points determine a circle, when the drive gear 240 drives the anti-rotation member 110, the first gripper 120, and the second gripper 130 to approach each other with the same displacement, the three points controlling the clamping of the bottle mouth 11 change simultaneously, so that the anti-rotation member 110, the first gripper 120, and the second gripper 130 simultaneously abut against the bottle mouth 11 and clamp the bottle mouth 11. Furthermore, when clamping bottles 1 with different sized bottle mouths 11, the center position of the bottle mouth 11 can be kept constant, that is, the transmission center of the bottle 1 remains unchanged, ensuring the smoothness of the overall operation.

[0042] The clamping force of the clamping assembly 100 on the bottle mouth 11 is controlled by the spring 220. In actual operation, different specifications of spring 220 are replaced according to the actual situation so that the clamping assembly 100 has sufficient clamping force to ensure that the bottle mouth 11 is clamped and to prevent the bottle 1 from sliding or falling during transportation or capping.

[0043] Furthermore, by adjusting the base 310, the position of the cam 320 can be adjusted, thereby adjusting the contact time and position between the adjusting roller 230 and the cam 320. This allows for adjustment of the opening and closing size and time of the first gripper 120 and the second gripper 130 to accommodate bottle mouths 11 of different sizes. In this invention, no parts or structures need to be replaced; simply adjusting the position of the cam 320 is sufficient to clamp bottle mouths 11 of different sizes, adapting to the production needs of bottles 1 of different sizes. The operation is simple, efficient, and low-cost.

[0044] In one embodiment, the first gripper 120 includes a first chuck 121 and a first transmission gear 122 connected to each other, and the second gripper 130 includes a second chuck 131 and a second transmission gear 132 connected to each other. The first transmission gear 122 meshes with the drive gear 240 and the second transmission gear 132 respectively. Specifically, the drive gear 240 rotates to drive the first transmission gear 122 to rotate, and the first transmission gear 122 then drives the second transmission gear 132 to rotate, so as to realize the synchronous rotation of the first gripper 120 and the second gripper 130, which move closer or further away from each other, thus realizing the gripping or releasing operation of the clamping assembly 100.

[0045] In one embodiment, the drive gear 240 includes a drive gear shaft and a gear body 241 that rotates around the drive gear shaft. The gear body 241 is provided with a first tooth portion 242 that meshes with the first transmission gear 122 and a second tooth portion 243 that meshes with the rack 111 of the anti-rotation member 110. The rotation of the gear body 241 synchronously drives the first gripper 120, the second gripper 130, and the anti-rotation member 110 to move synchronously. This ensures that the first gripper 120, the second gripper 130, and the anti-rotation member 110 are synchronized and safe during the opening and closing process, preventing any abnormal situations such as the bottle 1 becoming tilted or even damaged due to asynchronous movement of the first gripper 120, the second gripper 130, or the anti-rotation member 110.

[0046] Furthermore, the transmission ratios between the drive gear 240 and the first gripper 120, between the drive gear 240 and the anti-rotation member 110, and between the first grippers 120 are all the same. For example... Figure 6As shown, based on the principle that three points determine a circle, the driving gear 240 meshes with the first gripper 120 and the anti-rotation member 110, respectively. At the same time, the second gripper 130 also meshes with the first gripper 120 through gears. This ensures that the driving gear 240 has a fixed transmission ratio with the first gripper 120, the second gripper 130, and the anti-rotation member 110, allowing the first gripper 120, the second gripper 130, and the anti-rotation member 110 to open and close synchronously. This controls the simultaneous change of the three points that clamp the bottle opening 11, so that after different sizes of bottle openings 11 are clamped, the transmission center of the bottle 1 remains unchanged. This achieves automatic adaptation to clamping any size bottle 1 within a specific range without changing any parts.

[0047] In one embodiment, the clamping assembly 300 further includes an adjusting base 310, on which an adjusting screw 330 is rotatably connected. A cam 320 is threadedly connected to the adjusting screw 330. The adjusting screw 330 rotates and drives the cam 320 to move along the axis of the adjusting screw 330, thereby adjusting the initial contact position between the cam 320 and the roller 230 and the separation position between the cam 320 and the roller 230. This adjusts the opening and closing position nodes of the clamping assembly 100, enabling it to adapt to the clamping operations of bottle mouths 11 of different sizes of bottles 1. In this embodiment, the opening and closing position nodes of the clamping assembly 100 can be adjusted simply by adjusting the position of the cam 320. When changing to different sizes of bottles 1, it is not necessary to disassemble and replace the clamping assembly 100, making the operation simple and convenient, highly versatile, and conducive to improving work efficiency.

[0048] In one embodiment, the adjusting base 310 is further provided with an adjusting wheel 340 that is pulverizedly connected to the adjusting screw 330. The adjusting wheel 340 drives the adjusting screw 330 to rotate, thereby causing the cam 320 to move along the axis of the adjusting screw 330, thus adjusting the position of the cam 320. The adjusting wheel 340 facilitates manual operation of the cam 320 by the operator, reducing the labor intensity of the operator. In actual operation, scale markings are provided on the adjusting base 310 or the adjusting screw 330 to facilitate accurate control of the distance and position of the cam 320 during adjustment. Of course, in other embodiments, a motor, cylinder, or other driving device can also be pulverizedly connected to the adjusting screw 330 to drive its rotation, achieving automated adjustment operation, improving the accuracy and stability of the adjustment, and saving manpower.

[0049] Furthermore, the clamping assembly 300 also includes a slider 350, with a cam 320 fixed on the slider 350. The slider 350 has a threaded hole that is threadedly connected to the adjusting screw 330, so that when the adjusting screw 330 is driven to rotate by the adjusting wheel 340, the slider 350 can move along the axial direction of the adjusting screw 330, and drive the cam 320 fixed on the slider 350 to move along the axial direction of the adjusting screw 330, thereby realizing the adjustment of the position of the cam 320.

[0050] In one embodiment, the drive assembly 200 further includes a gear holder 250, which is connected to the transmission bracket 210. A sleeve bearing 251 is provided inside the gear holder 250, and the drive gear 240 is embedded in the sleeve bearing 251 to ensure smooth rotation of the drive gear 240, thereby ensuring smooth opening and closing control of the clamping assembly 100.

[0051] In one embodiment, the clamping assembly 100 further includes an anti-rotation guide seat 140, which has a guide groove. The anti-rotation member 110 is movably disposed in the guide groove. A transmission opening is formed on the side wall of the guide groove facing the drive gear 240. The rack 111 of the anti-rotation member 110 extends out of the transmission opening and meshes with the drive gear 240. By setting the anti-rotation guide seat 140 to position and limit the movement trajectory of the anti-rotation member 110, the movement stability of the anti-rotation member 110 is ensured. This ensures that after the first gripper 120 and the second gripper 130 clamp the bottle 1, the anti-rotation member 110 can stably move to the bottle mouth 11 of the bottle 1 and press against the bottle mouth 11.

[0052] In one embodiment, the anti-rotation member 110 is provided with a sharp and pointed blade 112 at the end away from the anti-rotation member guide seat 140. When the blade 112 is pressed against the bottle mouth 11, it partially penetrates the bottle mouth 11. Thus, when the bottle 1 is clamped by the first gripper 120 and the second gripper 130, the bottle 1 is also fixed to the anti-rotation member 110, which improves the clamping degree of the clamping assembly 100 on the bottle 1 and effectively prevents the bottle 1 from slipping or falling.

[0053] like Figure 7 As shown, this embodiment also provides a capping machine, including a machine body 400 and the aforementioned bottle clamping mechanism. A turntable 410 is rotatably mounted on the machine body 400. A clamping assembly 100 and a driving assembly 200 are mounted on the turntable 410. A bottle inlet junction point 411 is provided on the turntable 410 near the external bottle inlet unit 2, and a bottle outlet junction point 412 is provided on the turntable 410 near the external bottle outlet unit 3. An opening clamping assembly 300 is mounted on the machine body 400. Two sets of opening clamping assemblies 300 are provided, one set of which is located near the bottle inlet junction point 411, and the other set of which is located near the bottle outlet junction point 412.

[0054] Specifically, during the bottle transfer operation, before the clamping assembly 100 reaches the bottle transfer point 411 as the turntable 410 rotates, the roller 230 first abuts against the opening section 321 of the corresponding cam 320, driving the drive gear 240 to reverse and drive the first gripper 120 and the second gripper 130 to move away from each other, so that the bottle 1 of the bottle-feeding unit 2 can be inserted between the first gripper 120 and the second gripper 130. Then, as the turntable 410 rotates, the roller 230 moves from the opening section 321 of the corresponding cam 320 to the closing section 322, and drives the drive gear 240 to rotate forward, driving the first gripper 120 and the second gripper 130 to move closer to each other. Finally, at the bottle transfer point 411, the first gripper 120 and the second gripper 130 completely clamp the bottle mouth 11 of the bottle 1. At this time, the anti-rotation member 110 also abuts against the bottle mouth 11, completing the bottle transfer operation.

[0055] During the bottle transfer operation, when the clamping assembly 100 rotates with the turntable 410 to the bottle transfer point 412, the roller 230 abuts against the opening section 321 of the corresponding cam 320, driving the drive gear 240 to reverse so as to drive the first gripper 120 and the second gripper 130 to move away from each other, so that the clamping assembly 100 gradually releases the bottle mouth 11 of the bottle 1 and takes the bottle 1 away through the bottle transfer unit 3, thus completing the bottle transfer operation.

[0056] The aforementioned turntable 410 drives the clamping assembly 100 and the drive assembly 200 to rotate cyclically, repeatedly receiving the bottle 1 from the bottle inlet unit 2, capping it (this part is the same as the operation of the capping machine in the prior art, and will not be described again here), and then passing the capped bottle 1 to the bottle outlet unit 3.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bottle clamping mechanism, characterized in that, include: A clamping assembly (100) includes an anti-rotation member (110), a first gripper (120), and a second gripper (130) rotatably engaged with the first gripper (120). A drive assembly (200) includes a transmission bracket (210), a spring (220), and a roller (230). One end of the transmission bracket (210) is provided with a drive gear (240), and the other end of the transmission bracket (210) is connected to the roller (230) through the spring (220). The drive gear (240) is connected to the anti-rotation member (110) and the first gripper (120) respectively to drive the anti-rotation member (110), the first gripper (120), and the second gripper (130) to move closer or further away from each other at equal distances along the radial direction of the bottle mouth (11). An opening clamping assembly (300) includes a cam (320) located on the movement trajectory of the roller (230). The cam (320) is provided with an opening clamping section (321) and a closing section (322). When the roller (230) moves to the opening clamping section (321) of the cam (320), the anti-rotation member (110), the first jaw (120) and the second jaw (130) move away from each other. When the roller (230) moves to the closing section (322) of the cam (320), the anti-rotation member (110), the first jaw (120) and the second jaw (130) move closer to each other.

2. The bottle clamping mechanism according to claim 1, characterized in that, The first gripper (120) includes a first chuck (121) and a first transmission gear (122) connected to each other, and the second gripper (130) includes a second chuck (131) and a second transmission gear (132) connected to each other. The first transmission gear (122) meshes with the drive gear (240) and the second transmission gear (132) respectively.

3. The bottle clamping mechanism according to claim 2, characterized in that, The driving gear (240) includes a driving gear shaft and a gear body (241) that rotates around the driving gear shaft. The gear body (241) is provided with a first tooth (242) that meshes with the first transmission gear (122) and a second tooth (243) that meshes with the rack (111) of the anti-rotation member (110).

4. The bottle clamping mechanism according to claim 3, characterized in that, The transmission ratios of the drive gear (240) and the first gripper (120), the drive gear (240) and the anti-rotation member (110), and the first gripper (120) and the first gripper (120) are all the same.

5. The bottle clamping mechanism according to any one of claims 1 to 4, characterized in that, The clamping assembly (300) further includes an adjusting base (310), on which an adjusting screw (330) is rotatably connected. The cam (320) is threadedly connected to the adjusting screw (330). The adjusting screw (330) rotates and drives the cam (320) to move along the axis of the adjusting screw (330) to adjust the initial contact position of the cam (320) and the roller (230) and the separation position of the cam (320) and the roller (230).

6. The bottle clamping mechanism according to claim 5, characterized in that, The adjusting base (310) is also provided with an adjusting wheel (340) that is hygienically connected to the adjusting screw (330), and the adjusting wheel (340) drives the adjusting screw (330) to rotate.

7. The bottle clamping mechanism according to claim 5, characterized in that, The clamping assembly (300) further includes a slider (350), the cam (320) is fixed on the slider (350), and the slider (350) is provided with a threaded hole that is threadedly connected to the adjusting screw (330).

8. The bottle clamping mechanism according to any one of claims 1 to 4, characterized in that, The clamping assembly (100) further includes an anti-rotation guide seat (140), in which a guide groove is provided. The anti-rotation member (110) is movably disposed in the guide groove. A transmission opening is provided on the side wall of the guide groove facing the drive gear (240). The rack (111) of the anti-rotation member (110) extends out of the transmission opening and meshes with the drive gear (240).

9. The bottle clamping mechanism according to claim 8, characterized in that, The anti-rotation member (110) has a blade (112) at one end away from the anti-rotation member guide seat (140), and the blade (112) partially penetrates the bottle mouth (11) when it is pressed against the bottle mouth (11).

10. A capping machine, characterized in that, The device includes a body (400) and a bottle clamping mechanism as described in any one of claims 1 to 9. A turntable (410) is rotatably disposed on the body (400). The clamping assembly (100) and the driving assembly (200) are disposed on the turntable (410). A bottle inlet junction point (411) is provided on the turntable (410) near the external bottle inlet unit (2), and a bottle outlet junction point (412) is provided on the turntable (410) near the external bottle outlet unit (3). The clamping assembly (300) is disposed on the body (400). There are two sets of clamping assemblies (300), one set of which is disposed near the bottle inlet junction point (411), and the other set of which is disposed near the bottle outlet junction point (412).

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