Rotary vacuumizing cap screwing device

Abstract

The invention relates to a rotary vacuumizing and cap screwing device, and belongs to the technical field of sealing equipment. The rotary vacuumizing and cap screwing device comprises a conveying mechanism, a driving mechanism, a movable mechanism and a guide part, the conveying mechanism is used for conveying bottle bodies, and bottle caps are put on the bottle bodies; the driving mechanism drives the movable mechanism to revolve and rotate around an axis L1 and simultaneously drives the movable mechanism to lift; the movable mechanism is provided with a pressing head and a sleeve, an air bag for holding a bottle body is arranged on the inner side of the sleeve, and the pressing head is used for pressing and rotating a bottle cap; the guide piece is used for limiting rotation of the sleeve; the conveying route partially coincides with the revolution route of the movable mechanism, so that the sleeve can take the bottle bodies away from the conveying route for cap screwing, and the bottle bodies are released and returned after cap screwing is completed; an electromagnet is further arranged in the pressing head and used for adsorbing the bottle cap before the bottle cap is pressed, so that the bottle cap is attached to the bottom face of the pressing head, and therefore parallel alignment of the bottle cap and the bottle opening is achieved. The embodiment of the invention provides a rotary vacuumizing cap screwing device which can complete alignment of a bottle cap before cap screwing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing equipment, in particular to a rotary vacuum capping device. BACKGROUND

[0002] The rotary vacuum capping machine is a key equipment in the food, beverage, pharmaceutical and other industries for vacuumizing and tightening the packaging containers (such as glass bottles, plastic bottles). Its working process usually includes steps such as grabbing the bottle body, removing the residual air at the bottle opening, and rotating the bottle cap to the predetermined torque, so as to realize the quality preservation and sealing of the product.

[0003] In the existing rotary capping technology, the bottle cap is usually simply placed on the bottle opening, and then the capping device is pressed down and rotated to complete the tightening. However, in actual production, the placed bottle cap often cannot be strictly parallel to the bottle opening due to conveying vibration, positioning error and other reasons, that is, there is an initial inclination. This initial inclination will cause a series of problems in the capping process.

[0004] Firstly, when the pressure head is pressed down and rotated, the inclined bottle cap and the bottle opening thread contact is a non-uniform line or point contact, rather than an ideal surface contact. This will cause the rotation torque transmission efficiency to be reduced, and it is easy to slip at the thread engagement. The slip not only causes the capping torque to be substandard, affecting the sealing, but also may generate debris due to friction, polluting the contents.

[0005] Secondly, due to the slip and uneven force, in order to achieve the preset tightening torque, the equipment often needs to prolong the rotation time or increase the pressing force. This easily leads to over-rotation, that is, the bottle cap thread is excessively pressed against the bottle opening thread, which may cause permanent deformation of the plastic thread or wear of the glass thread, damaging the reliability and repeated opening performance of the packaging.

[0006] Furthermore, the inclined bottle cap is difficult to achieve uniform and tight fitting with the bottle opening sealing surface. Even after vacuumizing and tightening, this uneven stress distribution may form a fine leakage channel at the sealing surface, affecting the maintenance of the vacuum degree, and ultimately leading to the shortening of the product shelf life.

[0007] Therefore, there is an urgent need for a new capping device that can complete the alignment of the bottle cap before the vacuumizing and tightening process in high-speed continuous production. SUMMARY

[0008] The purpose of the present application is to solve the above problems, and provide a rotary vacuum capping device that can complete the alignment of the bottle cap before capping, so as to improve the above problems.

[0009] The present application is achieved by the following technical scheme: The application provides a rotary vacuum capping device, which comprises a conveying mechanism, a driving mechanism, a movable mechanism and a guide piece. The conveying mechanism is used for conveying a bottle body along a conveying route, and a bottle cap is placed on the bottle body. The driving mechanism drives the movable mechanism to revolve around an axis L1 and rotate, and simultaneously drives it to lift. The movable mechanism is provided with a pressure head and a sleeve arranged outside the pressure head. The inside of the sleeve is provided with an air bag used for holding the bottle body. The pressure head is used for pressing and rotating the bottle cap. The guide piece is used for limiting the rotation of the sleeve. The conveying route is partially coincident with the revolving route of the movable mechanism, so that the sleeve can take the bottle body away from the conveying route to rotate the bottle cap, and release the bottle body to return after completion. An electromagnet is further arranged in the pressure head, which is used for adsorbing the bottle cap before pressing the bottle cap, so that the bottle cap is attached to the bottom surface of the pressure head, thereby realizing the parallel alignment of the bottle cap and the bottle mouth.

[0010] In the technical scheme of the embodiment of the application, the active alignment action of the electromagnet adsorbing first before pressing ensures that the bottle cap and the bottle mouth are in a parallel state at the moment of being screwed in. This makes the initial engagement of the thread into full circumferential surface contact, reducing the phenomenon of slipping. Uniform stress makes the transmission of rotational torque more efficient and accurate, and it is easy to stabilize the preset tightening torque, avoiding over-rotation or insufficient torque caused by slipping. At the same time, it reduces the time of invalid friction. Parallel alignment enables the sealing gasket of the bottle cap to be uniformly pressed on the sealing surface of the bottle mouth, forming a more reliable seal after vacuumizing, which is conducive to maintaining the vacuum degree for a long time. In addition, reducing slipping also reduces the risk of product contamination by plastic or metal debris caused by friction. Uniform thread engagement stress between the bottle cap and the bottle mouth avoids stress concentration, reduces scratches on the plastic thread or abnormal wear on the glass thread, and protects the integrity of the package and the possible repeated opening performance.

[0011] In some embodiments, the movable mechanism further comprises an armature block; the armature block cooperates with the electromagnet to descend and approach or contact the bottle cap when the electromagnet is de-energized, and adsorb the bottle cap when the electromagnet is energized, so that the bottle cap is attached to the bottom surface of the armature block and rises with it.

[0012] In the technical scheme of the embodiment of the application, the movable armature block is used as an intermediate medium to realize the contact adsorption and lifting of the electromagnet on the bottle cap. Its flat bottom surface provides a physical alignment reference for the bottle cap, and the alignment action is more certain and accurate compared with non-contact adsorption. The contact working mode of the armature block avoids the impact or wear on the top printing or coating of the bottle cap caused by the direct long-distance adsorption of the electromagnet. At the same time, for bottle caps with weak magnetism, physical contact can also provide a more reliable starting point for gripping, improving the applicability of the device. The action logic of first contact and then adsorption makes the bottle cap adsorption process more gentle and controllable. The relative movement of the armature block is independent of the synchronous large stroke movement of the pressure head and the sleeve, separating the fine alignment micro-motion from the overall gripping and transferring gross motion, so that each part of the system performs its own function, and the overall operation is more reliable.

[0013] In some embodiments, the projection of the bottle cap on the armature block is within the range of the armature block; the edge of the surface of the armature block that is in contact with the bottle cap is provided with an elastic positioning ring protruding towards the bottle cap; the edge area of the surface of the pressing head facing the bottle cap is provided with a wedge-shaped block; when the bottle cap is in contact with the armature block, the positioning ring is arranged around the bottle cap; when the armature block rises, the wedge-shaped block deforms the positioning ring towards the bottle cap to clamp the bottle cap.

[0014] In the technical scheme of the embodiments of the present application, the bottle cap is firmly locked from the side by the mechanical clamping of the positioning ring, and the face contact of the magnetic adsorption of the top surface forms a double insurance of lateral holding, which enhances the reliability of torque transmission and eliminates the slipping phenomenon during cap screwing. For smooth surface (such as glass cap), bottle caps with coating or heavy weight, the reliability of pure magnetic adsorption may decrease. The mechanical clamping mechanism of the design does not depend on the magnetism or surface friction coefficient of the bottle cap, which expands the application range and stability of the device. The deformation clamping of the elastic positioning ring is flexible, which can adapt to slightly different diameters of the bottle cap and can buffer the possible slight impact in the initial stage of cap screwing, protecting the appearance of the bottle cap.

[0015] In some embodiments, the positioning ring comprises an elastic inner ring and a hard outer ring, and a through hole is provided between the inner ring and the outer ring for the wedge-shaped block to extend into; the outer circumferential surface of the outer ring is in sliding fit with the inner wall of the sleeve.

[0016] In the technical scheme of the embodiments of the present application, the wedge-shaped block directly acts on the through hole between the inner and outer rings, the force flow path is short and clear, and the vertical motion can be efficiently and accurately converted into radial extrusion force on the elastic inner ring. The existence of the hard outer ring avoids the absorption of the clamping force by the deformation of the ring body itself, ensuring that most of the extrusion force is used to deform the inner ring and clamp the bottle cap, and the clamping force can be stably designed through the angle of the wedge-shaped block and the elasticity of the inner ring. The sliding fit of the outer ring with the inner wall of the sleeve adds a linear bearing for the relative movement of the armature block. The possible shaking or tilting of the armature block during lifting is eliminated, ensuring that the axis of the bottle cap remains centered with the axis of the bottle body during the whole process of being adsorbed, aligned, clamped and rotated, improving the quality of cap screwing. The hard outer ring (such as metal or hard plastic) provides the necessary structural strength and rigidity, responsible for accurate guidance and force transmission; the elastic inner ring (such as engineering rubber) is responsible for performing flexible clamping action and adapting to the tolerance of the bottle cap. This composite structure not only ensures accurate and reliable action, but also has inclusiveness for different bottle caps.

[0017] In some embodiments, a vacuum generating device is further included for generating negative pressure in the sealed space formed by the sleeve, the pressing head, the air bag and the bottle body.

[0018] The technical scheme of the embodiment of the application creates a negative pressure environment in the bottle mouth part before capping, which can effectively remove the residual air (especially oxygen) in the top gap of the bottle, thereby prolonging the shelf life of the contents (such as food, beverage, medicine). Under the negative pressure environment, the bottle cap is subjected to an atmospheric pressure acting towards the bottle mouth, so that the bottle cap is more closely attached to the bottle mouth in the initial stage of screwing, which helps to guide the smooth engagement of the threads and may make the capping process more stable.

[0019] In some embodiments, the air bag is sleeved outside the bottle body extending into the sleeve; the air bag is in sliding cooperation with the inner wall surface of the sleeve through the sliding part, and the sleeve is provided with a groove for cooperating with the sliding part to limit the rotation of the sliding part; a sealing element is arranged between the sliding part and the inner wall of the sleeve; the air bag is connected with an air pipe, and the air pipe is provided with an air pump; the air pump controls the expansion or contraction of the air bag by pumping or charging air to the air bag, so as to tightly hold or release the bottle body.

[0020] In the technical scheme of the embodiment of the application, the air bag is inflated to achieve the holding, which is suitable for different bottle diameters and ovality and protects the bottle body; the cooperation of the sliding part and the groove limits the rotation, which provides absolute circumferential positioning for the bottle body, ensures that all torques are used for tightening the bottle cap when capping, and the bottle body itself never rotates, thereby solving the problem of capping slip. The introduction of the sealing element solves the potential leakage point at the dynamic cooperation interface between the sliding part and the sleeve. This makes the sealing space formed by the enclosure have high integrity, and the pipeline negative pressure can more effectively act on the bottle mouth space when vacuumizing, instead of being consumed in making up the leakage, so that the vacuumizing speed is faster, the final vacuum degree is higher and more stable.

[0021] In some embodiments, the driving mechanism includes a positioning shaft, a rotating wheel, a first transmission module and a second transmission module; the rotating wheel is sleeved on the positioning shaft and rotates around the axis L1 of the positioning shaft under the driving of the rotating motor; the movable mechanism is movably arranged on the rotating wheel and revolves around the positioning shaft under the driving of the rotating wheel; the first transmission module is used to drive the movable mechanism to rotate; the second transmission module is arranged on the outer peripheral surface of the positioning shaft and is used to drive the movable mechanism to move up and down along the axis L1.

[0022] In the technical scheme of the embodiment of the application, the three necessary movements of revolution, lifting and rotation are integrated by mechanical means, which ensures the accuracy and repeatability of the movement trajectory and timing of the movable mechanism, and meets the requirements for positioning accuracy in high-speed continuous production. All core driving functions are concentrated on the rotating wheel rotating around the fixed shaft and its associated mechanisms, which has compact structure and clear movement chain. The mechanical transmission and guiding mode avoids complex multi-axis coordination control, and has high operation reliability. The movable mechanisms of multiple stations are driven by the same set of central driving mechanisms (rotating wheel, first transmission module and second transmission module), which realizes the synchronization of movement and simplifies the power and control system of the overall equipment.

[0023] In some embodiments, the first transmission module comprises a main gear and a planetary gear meshing with each other; the main gear is sleeved on the positioning shaft; the planetary gear is sleeved outside the movable mechanism and rotates synchronously with the movable mechanism.

[0024] In the technical solution of the embodiments of the present application, the revolution motion is converted into the rotation motion through the meshing of the main gear and the planetary gear, and a fixed transmission ratio relationship exists between the two. This ensures that the rotation speed of the pressure head is completely synchronized with the revolution speed (i.e. production rhythm), the motion is coordinated, there is no control delay, and it is suitable for high-speed continuous operation. Gear transmission is a mature and efficient mechanical transmission mode, which runs smoothly and has low noise. The main gear is fixed on the central positioning shaft, and the planetary gear is integrated outside the movable mechanism. This layout makes full use of the space, so that the entire driving mechanism is compact in structure, high in rigidity, and good in long-term operation reliability. All the movable mechanisms installed on the rotating wheel are driven by the same fixed main gear. This mechanically ensures that the pressure head of each station has exactly the same motion characteristics (rotation speed, rotation direction) when capping, eliminates the differences that may be caused by individual driving, and ensures the consistency of the product capping quality.

[0025] In some embodiments, the second transmission module comprises a guide rail and a walking wheel; the guide rail is arranged along the outer circumferential surface of the positioning shaft; the walking wheel is rotatably arranged on the movable mechanism and cooperates with the guide rail; the guide rail undulates along the direction of the axis L1 to guide the movable mechanism to ascend and descend.

[0026] In the technical solution of the embodiments of the present application, the cooperation between the walking wheel and the guide rail is a kind of forced mechanical constraint relationship. The ascending and descending positions of the movable mechanism are uniquely determined by the angular position of the movable mechanism on the revolution circumference, and the motion trajectory is determined and unchanged. This makes the entire ascending and descending process run stably in an open loop, simplifying the control system. Compared with the transmission modes such as lead screws and synchronous belts, the rolling contact pair formed by the guide rail and the walking wheel can withstand a larger radial force and overturning moment, providing stable support for the movable mechanism under the force conditions such as grabbing and capping, and ensuring the stability of the motion.

[0027] In some embodiments, the guide rail comprises a steep section and a gentle section; the steep section is closer to the bottle body than the gentle section; the included angle between the steep section and the radial direction of the positioning shaft is greater than the included angle between the gentle section and the radial direction of the positioning shaft; in the extension direction, the length of the steep section is less than the length of the gentle section.

[0028] In the technical solution of the embodiments of the present application, the required pressing force of the sealing surface is directly and controllably applied through active axial feeding (the descent of the steep section), and the reliability is much higher than that of the traditional method which relies on the axial force generated by screwing. The gentle section ensures the stability and reliability of the preparation action, and the steep section efficiently and high-quality completes the core screwing. The combination of the two realizes high-quality production at a high rhythm.

[0029] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0031] Figure 1 Structure diagram of the rotary vacuum capping device provided by some embodiments of the application; Figure 2 Structure diagram of the rotary vacuum capping device provided by some other embodiments of the application; Figure 3 Front view of the moving mechanism provided by some embodiments of the application; Figure 4 When the armature block cooperates with the electromagnet Figure 3 Sectional view at A-A; Figure 5 Sectional view of the internal structure of the sleeve provided by some embodiments of the application; Figure 6 When the electromagnet is powered off Figure 5 Enlarged view at B; Figure 7 When the electromagnet is powered on Figure 5 Enlarged view at B; Figure 8 Structure diagram of the positioning ring provided by some embodiments of the application; Figure 9 When the air bag cooperates with the sleeve through the sliding part Figure 3 Sectional view at A-A; Figure 10 Sectional view of the internal structure of the sleeve provided by some other embodiments of the application.

[0032] Icons: 10-Bottle body; 11-Bottle cap; 2-Conveying mechanism; 3-Drive mechanism; 30-Positioning shaft; 31-Rotating wheel; 32-First transmission module; 320-Main gear; 321-Planetary gear; 33-Second transmission module; 330-Guide rail; 3300-Steep section; 3301-Slow section; 331-Walking wheel; 4-Moving mechanism; 40-Pressure head; 400-Electromagnet; 401-Wedge block; 41-Sleeve; 42-Airbag; 43-Armature block; 44-Positioning ring; 440-Inner ring; 441-Outer ring; 45-Sliding part; 450-Seal; 5-Guide. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0035] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0038] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0039] According to some embodiments of this application, optionally, such as Figures 1-5 , Figures 9-10 As shown, this application provides a rotary vacuum capping device, which includes a conveying mechanism 2, a driving mechanism 3, a movable mechanism 4, and a guide 5. The conveying mechanism 2 is used to convey the bottle body 10 along the conveying route, and the bottle cap 11 is placed on the bottle body 10. The driving mechanism 3 drives the movable mechanism 4 to revolve around the axis L1 and rotate on its own axis, while simultaneously driving its lifting and lowering. The movable mechanism 4 is provided with a pressure head 40 and a sleeve 41 sleeved on the outside of the pressure head 40. The inner side of the sleeve 41 is provided for gripping the bottle body 10. The airbag 42 and the pressure head 40 are used to press and rotate the bottle cap 11; the guide 5 is used to limit the rotation of the sleeve 41; wherein, the conveying route and the revolution route of the moving mechanism 4 are partially overlapped, so that the sleeve 41 can carry the bottle 10 away from the conveying route for capping, and release the bottle 10 to return after completion; the pressure head 40 is also provided with an electromagnet 400, which is used to attract the bottle cap 11 before pressing the bottle cap 11, so that the bottle cap 11 is in contact with the bottom surface of the pressure head 40, thereby achieving parallel alignment between the bottle cap 11 and the bottle mouth.

[0040] This application mainly relates to the tightening operation of packaging containers using metal bottle caps 11 that can be attracted by an electromagnet 400.

[0041] In practical application, the conveying mechanism 2 continuously transports the bottle 10, which has been filled with contents and has a cap 11 placed on its neck, forward along a predetermined conveying route. At this time, the cap 11 is simply placed on the bottle neck and may be slightly tilted due to vibration or positioning deviation. The driving mechanism 3 drives the movable mechanism 4 to move along its revolution route. When the revolution route of the movable mechanism 4 coincides with the conveying route, the sleeve 41 descends. The air bladder 42 inside the sleeve 41 inflates and gently and firmly holds the bottle 10 located directly below it from the side. Subsequently, the movable mechanism 4 (at this time, the bottle 10 is fixed inside the sleeve 41) continues its revolution. Through revolution, the fixed bottle 10 is pushed and transferred from the conveying route segment that coincides with it to a separate capping station. During this process, the guide 5 (such as a fixed guide rod) plays a role in restricting the rotation (i.e., self-rotation) of the sleeve 41 around its own axis, so that it only maintains lifting and revolution movements, thereby ensuring that the bottle 10 is stable and does not twist during transportation. After the sleeve 41 grips the bottle 10 and enters the capping station, the pressure head 40 descends under the drive of the drive mechanism 3. Just before the bottom surface of the pressure head 40 is about to contact the top of the bottle cap 11, the electromagnet 400 integrated inside is energized, generating a strong magnetic attraction. This attraction pulls the bottle cap 11, which may have been tilted, upward, so that its top is tightly pressed against the flat bottom surface of the pressure head 40. Since the bottom surface of the pressure head 40 is strictly horizontal, the bottle cap 11 is forced to adjust its posture under the action of its attraction force, finally achieving a complete fit between the bottle cap 11 and the bottom surface of the pressure head 40. This process essentially corrects the initial tilt of the bottle cap 11, ensuring that the sealing surface of the bottle cap 11 is parallel and aligned with the bottle mouth. After alignment, the device evacuates the space at the bottle neck head through sleeve 41 or an independent pipeline. Then, the drive mechanism 3 drives the pressure head 40 to rotate around axis L1 while maintaining a tight grip. Since the bottle cap 11 is held in place by the electromagnet 400, the rotational torque of the pressure head 40 is effectively transmitted to the bottle cap 11, allowing it to be screwed in while aligned with the bottle neck. Sleeve 41 does not rotate due to the constraint of guide 5, providing stable counter-torque support for the bottle body 10. After tightening to the preset torque, the electromagnet 400 is de-energized, releasing the bottle cap 11. The pressure head 40 and sleeve 41 rise synchronously, releasing the capped bottle body 10 onto the conveyor route or another return line, allowing it to return to the subsequent process.

[0042] The electromagnet 400's pre-aperture alignment before pressure application ensures that the cap 11 and the bottle neck are parallel to each other the moment they are screwed in. This results in full-circumferential surface contact during the initial thread engagement, reducing slippage. Uniform force distribution makes torque transmission more efficient and precise, facilitating the stable achievement of the preset tightening torque and preventing over-tightening or insufficient torque due to slippage. It also reduces ineffective friction time. Parallel alignment allows the cap 11's sealing gasket to be evenly pressed against the bottle neck sealing surface, resulting in a more reliable seal after vacuuming and facilitating long-term maintenance of vacuum levels. Furthermore, reduced slippage lowers the risk of plastic or metal debris contaminating the product due to friction. The uniform thread engagement between the cap 11 and the bottle neck prevents stress concentration, reducing scratches on plastic threads or abnormal wear on glass threads, protecting the integrity of the packaging and its ability to withstand repeated opening.

[0043] In practice, a layer of high-performance flexible wear-resistant material (such as special polyurethane) can be applied to the bottom surface of the pressure head 40. This provides better containment while ensuring flat adsorption, and also achieves good surface contact for bottle caps 11 with slightly uneven or concave tops, enhancing alignment and adsorption reliability.

[0044] To accommodate bottle caps 11 made of different materials (such as iron, and some stainless steel) or of different sizes, the electromagnet 400 inside the pressure head 40 can be adjusted with multi-level magnetic force or controlled independently in zones. For example, a lower magnetic force can be used for small bottle caps 11, while a stronger magnetic force can be used for heavy bottle caps 11; or a tilt in a known specific direction can be initially corrected by zoned adsorption.

[0045] According to some embodiments of this application, optionally, such as Figures 4-7 As shown, the active mechanism 4 also includes an armature block 43; the armature block 43 cooperates with the electromagnet 400 to descend and approach or contact the bottle cap 11 when the electromagnet 400 is de-energized, and attracts the bottle cap 11 when the electromagnet 400 is energized, so that the bottle cap 11 is attached to the bottom surface of the armature block 43 and rises with it.

[0046] In practical applications, when it is necessary to grasp the bottle 10 at the workstation, the drive mechanism 3 drives the entire movable mechanism 4 to descend synchronously. During this process, the sleeve 41 covers the bottle 10, while the pressure head 40 points towards the bottle cap 11. At this time, the electromagnet 400 is de-energized. Due to gravity or the action of the built-in return spring, the armature block 43 extends downward relative to the pressure head 40, so that its bottom surface is close to or slightly in contact with the top of the bottle cap 11 placed below. When the movable mechanism 4 descends to the working position, the air bladder 42 inside the sleeve 41 inflates, gripping the bottle 10 tightly. At the same time, the electromagnet 400 inside the pressure head 40 is instantly energized, generating a strong magnetic force that attracts the armature block 43 upward. During the ascent, the flat bottom surface of the armature block 43 firmly attracts the bottle cap 11 and lifts it a small distance, forcing the top of the bottle cap 11 to completely fit against the bottom surface of the armature block 43. This action corrects the initial tilt of the bottle cap 11, achieving parallel alignment with the bottle mouth. After grasping and aligning, the drive mechanism 3 drives the movable mechanism 4 to revolve, synchronously carrying the bottle body 10 and bottle cap 11 away from the conveyor route to the capping station. At the capping station, the drive mechanism 3 drives the pressure head 40 (along with the attracted armature block 43 and bottle cap 11) to rotate, completing the tightening action. The sleeve 41 does not rotate under the constraint of the guide 5, providing stable counter-torque support. Throughout the capping process, the electromagnet 400 remains energized, and the lifting posture of the pressure head 40, armature block 43, and sleeve 41 remains synchronous and stable. After the capping reaches the preset torque, the electromagnet 400 is de-energized, and the magnetic force disappears. The attraction force of the armature block 43 on the bottle cap 11 is released. Subsequently, the drive mechanism 3 drives the entire movable mechanism 4 (pressure head 40 and sleeve 41) to rise synchronously. The airbag 42 deflates to release the bottle body 10, and the armature block 43 returns to its drooping ready state under its own gravity. The device resets, ready for the next work cycle.

[0047] This application utilizes a movable armature block 43 as an intermediate medium to achieve contact-based adsorption and lifting of the bottle cap 11 using electromagnetic force. Its flat bottom surface provides a physical alignment reference for the bottle cap 11, resulting in a more definite and precise alignment action compared to non-contact adsorption. The contact-based operation of the armature block 43 avoids the impact or wear that might occur to the printing or coating on the top of the bottle cap 11 caused by direct long-distance adsorption from the electromagnet 400. Simultaneously, for the bottle cap 11 with weak magnetism, physical contact provides a more reliable gripping starting point, improving the applicability of the device. The action logic of contact followed by adsorption makes the adsorption process of the bottle cap 11 more gentle and controllable. The relative movement of the armature block 43 is independent of the synchronous large-stroke movement of the pressure head 40 and the sleeve 41, separating the fine alignment micro-movements from the overall coarse grasping and transfer movements, allowing each part of the system to perform its function, resulting in more reliable overall operation.

[0048] According to some embodiments of this application, optionally, such as Figures 4-7As shown, the projection of the bottle cap 11 onto the armature block 43 is located within the range of the armature block 43; the edge of the surface of the armature block 43 that is in contact with the bottle cap 11 is provided with an elastic positioning ring 44 protruding toward the bottle cap 11; the edge area of ​​the pressure head 40 toward the surface of the bottle cap 11 is provided with a wedge block 401; when the bottle cap 11 is in contact with the armature block 43, the positioning ring 44 is arranged around the bottle cap 11; when the armature block 43 rises, the wedge block 401 pushes the positioning ring 44 to deform toward the bottle cap 11 to clamp the bottle cap 11.

[0049] In practical application, the moving mechanism 4 descends, the electromagnet 400 is de-energized, and the armature block 43, under the action of gravity, approaches or contacts the bottle cap 11. At this time, the elastic positioning ring 44 (made of rubber, silicone, or elastic metal) set on the edge of the bottom surface of the armature block 43, due to its natural convex state, acts like a fence around the outer perimeter of the side wall of the bottle cap 11, playing a preliminary positioning and guiding role. The electromagnet 400 is energized, and the armature block 43 is attracted and moves upward. At the initial moment of this upward process, the bottom surface of the armature block 43 attracts and lifts the bottle cap 11, forcing the top of the bottle cap 11 to fit against its bottom surface, completing the posture alignment. As the armature block 43 rises relative to the pressure head 40, the wedge-shaped block 401 (with its inclined surface facing down) fixed on the surface edge area of ​​the pressure head 40 facing the bottle cap 11 begins to contact and squeeze the outer inclined surface or upper surface of the elastic positioning ring 44. Since the positioning ring 44 surrounds the bottle cap 11, the downward slope of the wedge block 401 transforms the vertical movement of the armature block 43 upward into radial inward compression of the positioning ring 44. Under the continuous compression of the wedge block 401, the elastic positioning ring 44 deforms towards the center, causing its inner ring 440 to clamp the side wall of the bottle cap 11, which has been attracted and aligned. At this time, the bottle cap 11 is doubly fixed: its top surface is magnetically attracted by the bottom surface of the armature block 43, and its side wall is mechanically clamped by the deformed positioning ring 44. Throughout the vacuuming and capping process, the electromagnet 400 remains energized, and the armature block 43 remains in the rising position, so that the positioning ring 44 is continuously clamped and deformed under the action of the wedge block 401, providing an extremely stable grip for the bottle cap 11. After the capping is completed, the electromagnet 400 is de-energized, and the armature block 43 descends and resets under the action of gravity. As the armature block 43 descends, the positioning ring 44 gradually disengages from the pressure of the wedge block 401. Its elasticity allows it to return to its initial protruding and encircling state, the clamping force is released, and the bottle cap 11 is released.

[0050] When the cap is rotated at high speed, especially at the moment of initiation or when encountering resistance, the cap 11 may slip relative to the bottom surface of the armature block 43. This design uses the mechanical clamping of the positioning ring 44 to firmly lock the cap 11 from the side, forming a double guarantee of surface contact and lateral clamping with the magnetic adsorption of the top surface, enhancing the reliability of torque transmission and eliminating slippage during the capping process. For caps 11 with smooth surfaces (such as glass caps), coatings, or heavy weight, the reliability of pure magnetic adsorption may decrease. The mechanical clamping mechanism of this design does not rely on the magnetism of the cap 11 or the surface friction coefficient, expanding the applicability and stability of the device. The deformable clamping of the elastic positioning ring 44 is flexible, adaptable to caps 11 with slightly different diameters, and can buffer the minor impacts that may occur at the beginning of capping, protecting the appearance of the cap 11.

[0051] In practice, the wedge block 401 can be designed with a structure that allows for fine adjustment of its angle or radial position. By adjusting the wedge angle or the initial gap, the ideal clamping force for bottle caps 11 of different sizes and materials can be precisely set, enabling a single device to more flexibly adapt to a variety of products.

[0052] According to some embodiments of this application, optionally, such as Figures 5-8 As shown, the positioning ring 44 includes an elastic inner ring 440 and a rigid outer ring 441. A through hole is provided between the inner ring 440 and the outer ring 441 for the wedge block 401 to extend into. The outer circumferential surface of the outer ring 441 is in sliding fit with the inner wall of the sleeve 41.

[0053] In practical applications, when the electromagnet 400 is energized, the armature block 43 carries the entire positioning ring 44 upward relative to the pressure head 40. During this process, the rigid outer ring 441 slides smoothly along the inner wall of the sleeve 41, ensuring that the positioning ring 44 and even the entire armature block 43 do not wobble or tilt during relative upward movement, and the movement trajectory is straight. As it rises, the fixed wedge block 401 extends deeper into the through hole between the inner and outer rings 441, and its inclined surface begins to simultaneously squeeze the ring material on both sides of the through hole. Since the outer ring 441 is rigid, it mainly transmits force to the structure; while the elastic inner ring 440, under the direct pushing of the wedge block 401, produces controllable radial inward deformation, thereby uniformly clamping the side wall of the adsorbed bottle cap 11 from all sides.

[0054] At the capping station, the armature block 43 remains at its highest position, and the compression of the wedge block 401 against the through-hole area keeps the elastic inner ring 440 clamping the bottle cap 11. The sliding engagement between the outer ring 441 and the inner wall of the sleeve 41 provides additional radial support for the armature block 43 and the bottle cap 11 assembly during the capping process, suppressing radial vibrations that may be caused by high-speed rotation and making the capping action smoother. Upon completion of the capping process, the electromagnet 400 is de-energized, and the armature block 43 descends. The positioning ring 44 then descends, the wedge block 401 gradually withdraws from the through-hole, and the clamping force of the elastic inner ring 440 is released, restoring its original state. Throughout the entire descent and reset process, the outer ring 441 continues to slide along the inner wall of the sleeve 41, ensuring a smooth and precise release action.

[0055] The wedge block 401 acts directly on the through hole between the inner and outer rings 441, resulting in a short and clear force flow path. This efficiently and precisely converts vertical motion into radial compressive force on the elastic inner ring 440. The presence of the rigid outer ring 441 prevents the clamping force from being absorbed by the deformation of the ring itself, ensuring that most of the compressive force is used to deform the inner ring 440 and clamp the bottle cap 11. The magnitude of the clamping force can be stably designed through the angle of the wedge block 401 and the elasticity of the inner ring 440. The sliding fit between the outer ring 441 and the inner wall of the sleeve 41 adds a linear bearing to the relative movement of the armature block 43. This eliminates the possible swaying or tilting of the armature block 43 during lifting and lowering, ensuring that the alignment of the bottle cap 11's axis with the bottle body 10 axis is maintained throughout the entire process of being attracted, aligned, clamped, and rotated, thus improving the capping quality. The rigid outer ring 441 (such as metal or hard plastic) provides the necessary structural strength and rigidity, and is responsible for precise guidance and force transmission; the flexible inner ring 440 (such as engineering rubber) is responsible for performing flexible clamping action and adapting to the tolerances of the bottle cap 11. This composite structure ensures accurate and reliable operation while also being accommodating to different bottle caps 11.

[0056] According to some embodiments of this application, optionally, a vacuum generating device is also included, used to generate negative pressure within the sealed space formed by the sleeve 41, the pressure head 40, the air bladder 42, and the bottle body 10.

[0057] In practical applications, when the moving mechanism 4 descends, the sleeve 41 grips the bottle body 10 via the air bladder 42, while the pressure head 40 descends and finally presses the bottle cap 11 (or remains pressed after adsorption and alignment). At this time, the inner wall of the sleeve 41, the sealing lip of the air bladder 42, the bottom surface of the pressure head 40 (or armature block 43), and the bottle shoulder and bottle mouth area of ​​the bottle body 10 together form a temporary sealed space surrounding the bottle mouth. After the sealed space is formed, the vacuum generator is connected to and activated through a preset pipeline, quickly extracting the air within, thereby generating negative pressure (i.e., a vacuum state) within the sealed space. During the maintenance of a certain negative pressure level, residual air in the headspace of the bottle mouth is effectively removed. Subsequently, after maintaining the negative pressure or reaching a preset vacuum level, the drive mechanism 3 drives the pressure head 40 to rotate, tightening the aligned bottle cap 11. Since the tightening process is carried out in a low-oxygen environment, the oxygen content in the headspace of the bottle can be minimized. Once the cap reaches the preset torque, the vacuum generator stops working, and outside air can re-enter the pipeline and sealed space through a controllable valve, restoring its pressure to normal. Afterward, the electromagnet 400 is de-energized, the air bladder 42 deflates, and the moving mechanism 4 rises, completing one working cycle.

[0058] Creating a negative pressure environment at the bottle opening before screwing on the cap can effectively remove residual air (especially oxygen) from the headspace inside the bottle, extending the shelf life of the contents (such as food, beverages, and medicines). Under negative pressure, the cap 11 is subjected to atmospheric pressure towards the bottle opening, making it fit more tightly against the bottle opening in the initial screwing-in stage, which helps guide the threads to engage smoothly and may make the capping process more stable.

[0059] According to some embodiments of this application, optionally, such as Figures 9-10 As shown, the airbag 42 is sleeved on the outside of the bottle 10 that extends into the sleeve 41; the airbag 42 slides with the inner wall of the sleeve 41 through the sliding part 45, and the sleeve 41 is provided with a groove for cooperating with the sliding part 45 to restrict the rotation of the sliding part 45; a sealing element 450 is provided between the sliding part 45 and the inner wall of the sleeve 41; the airbag 42 is connected to an air tube, and an air pump is provided on the air tube. The air pump controls the expansion or contraction of the airbag 42 by drawing air or inflating it, thereby tightening or loosening the bottle 10.

[0060] In practical application, when the bottle 10 moves to the workstation along the conveyor line and is covered by the descending movable mechanism 4, the upper part of the bottle 10 (the bottle shoulder and bottle mouth area) extends into the sleeve 41. When the movable mechanism 4 descends to its position, the air pump quickly inflates the airbag 42 through the air pipe. The airbag 42 expands under air pressure, and the flexible material (such as rubber) on its inner side presses evenly against the outer wall of the bottle 10, thereby holding the bottle 10 tightly. During this process, since the sliding part 45 is restricted from rotating by the groove, the bottle 10, which is held tightly, is also indirectly restricted from rotating. More importantly, the sealing element 450 (such as an O-ring) set between the sliding part 45 and the inner wall of the sleeve 41 ensures that the sliding interface can maintain good airtightness even under the slight sliding or vibration that may exist in the sliding part 45. After the airbag 42 reliably holds the bottle 10 and the overall seal is formed, the vacuum generator is activated, establishes negative pressure in the sealed space and completes the vacuuming. Subsequently, the pressure head 40 performs the capping operation. Because the bottle 10 is flexibly held in place by the airbag 42 and its rotation is restricted by the cooperation of the sliding part 45 and the groove, it provides extremely stable support for capping without any back torque loss. After capping is completed, the vacuum generator stops and the vacuum is broken. Then, the air pump evacuates the airbag 42 through the air tube, causing its internal pressure to decrease and it to contract, thereby loosening its grip on the bottle 10. Subsequently, the entire moving mechanism 4 rises, the bottle 10 disengages, and one cycle is completed. The airbag 42 and the sliding part 45 can naturally fall back as the bottle 10 disengages during the reset process.

[0061] The capping device provided in this application achieves a tight seal through the inflation of the airbag 42, adapting to different bottle diameters and ovality to protect the bottle body 10. The sliding part 45, in conjunction with the groove, restricts rotation, providing absolute circumferential positioning for the bottle body 10. This ensures that all torque is used to tighten the cap 11 during capping, preventing the bottle body 10 from rotating and solving the capping slippage problem. The introduction of the sealing element 450 eliminates potential leakage points at the dynamic interface between the sliding part 45 and the sleeve 41. This results in a high degree of integrity in the enclosed sealing space, allowing the negative pressure in the pipeline to act more effectively on the bottle opening space during vacuuming, rather than being consumed in compensating for leaks. Consequently, the vacuuming speed is faster, and the final vacuum level is higher and more stable.

[0062] According to some embodiments of this application, optionally, such as Figures 1-2 As shown, the drive mechanism 3 includes a positioning shaft 30, a rotating wheel 31, a first transmission module 32, and a second transmission module 33. The rotating wheel 31 is sleeved on the positioning shaft 30 and rotates around the axis L1 of the positioning shaft 30 under the drive of the rotating motor. The movable mechanism 4 is vertically mounted on the rotating wheel 31 and revolves around the positioning shaft 30 under the drive of the rotating wheel 31. The first transmission module 32 is used to drive the movable mechanism 4 to rotate. The second transmission module 33 is located on the outer circumferential surface of the positioning shaft 30 and is used to drive the movable mechanism 4 to move up and down along the axis L1.

[0063] The guide part can be a guide rod provided on the rotating wheel 31 and extending along the axis L1, which restricts its rotation by cooperating with the off-axis through hole on the sleeve 41.

[0064] The capping device provided in this application integrates the three necessary movements of revolution, lifting, and rotation into one mechanical unit, ensuring the accuracy and repeatability of the motion trajectory and timing of the movable mechanism 4, and meeting the positioning accuracy requirements in high-speed continuous production. All core driving functions are concentrated on the rotating wheel 31 and its associated mechanisms around a fixed axis, resulting in a compact structure and a clear kinematic chain. The mechanical transmission and guiding method avoids complex multi-axis coordination control, ensuring high operational reliability. The movable mechanisms 4 at multiple workstations are driven by the same central drive mechanism 3 (rotating wheel 31, first transmission module 32, and second transmission module 33), achieving motion synchronization and simplifying the overall power and control system of the equipment.

[0065] According to some embodiments of this application, optionally, such as Figures 1-2 As shown, the first transmission module 32 includes a main gear 320 and a planetary gear 321 that mesh with each other; the main gear 320 is sleeved on the positioning shaft 30; the planetary gear 321 is sleeved on the outside of the movable mechanism 4 and rotates synchronously with the movable mechanism 4.

[0066] In practical applications, the main gear 320 is fixedly mounted on the stationary positioning shaft 30, with its axis coinciding with axis L1, and it does not rotate around axis L1. The planetary gear 321 is mounted on a shaft that can rotate around its own axis. This shaft is fixedly connected to the movable mechanism 4 (specifically, the transmission shaft that drives the pressure head 40 to rotate), thus enabling the planetary gear 321 to drive the movable mechanism 4 to rotate synchronously. The planetary gear 321 and the main gear 320 always remain meshed. When the rotating wheel 31, driven by the rotating motor, drives the movable mechanism 4 to revolve around the positioning shaft 30 (i.e., axis L1), because the planetary gear 321 is meshed with the fixed main gear 320, the planetary gear 321 is forced to generate a rotational motion around its own axis while following the revolve of the movable mechanism 4. This rotational motion is directly transmitted to the pressure head 40 in the movable mechanism 4 through the transmission shaft, thus realizing the rotation of the pressure head 40. Throughout the process, revolution is the active motion, generated by the rotating wheel 31 driven by the rotating motor; rotation is the driven motion derived from revolution, mechanically and deterministically generated through the meshing relationship between the main gear 320 and the planetary gear 321. The lifting and lowering of the moving mechanism 4 is controlled by an independent second transmission module 33. The three work together to ensure that the pressure head 40 can perform the capping action at the correct position, with the correct posture and speed.

[0067] This application converts revolution into rotation by meshing the main gear 320 and planetary gear 321, with a fixed transmission ratio between them. This ensures that the rotational speed of the press head 40 is completely synchronized with its revolution speed (i.e., production cycle time), resulting in coordinated movement, no control delay, and suitability for high-speed continuous operation. Gear transmission is a mature and efficient mechanical transmission method, offering smooth operation and low noise. Fixing the main gear 320 to the central positioning shaft 30 and integrating the planetary gear 321 on the outside of the movable mechanism 4, this layout fully utilizes space, making the entire drive mechanism 3 compact, highly rigid, and reliably reliable over long-term operation. All movable mechanisms 4 mounted on the rotating wheel 31 generate their rotational motion through the meshing of the same fixed main gear 320. This mechanically ensures that the press head 40 at each station has identical motion characteristics (speed and direction) during capping, eliminating potential differences caused by individual drives and guaranteeing consistent capping quality.

[0068] In the specific implementation process, the pressure head 40 and the planetary gear 321 can be connected by two connecting rods, and the two are connected by a magnetic coupler. This allows them to rotate relative to each other when the reaction force of the bottle cap 11 on the pressure head 40 is too large, so as to release the torsional stress and avoid damage to the connecting rods.

[0069] According to some embodiments of this application, optionally, such as Figures 1-2 As shown, the second transmission module 33 includes a guide rail 330 and a traveling wheel 331; the guide rail 330 is arranged along the outer peripheral surface of the positioning shaft 30; the traveling wheel 331 is rotatably mounted on the movable mechanism 4 and cooperates with the guide rail 330; the guide rail 330 undulates along the axis L1 to guide the movable mechanism 4 to rise and fall.

[0070] In practical applications, the guide rail 330 is fixedly installed on the outer circumferential surface of the stationary positioning shaft 30. Its profile is not straight, but rather designed as a curved shape with specific undulations along the axis L1, according to the required lifting sequence of the process. The traveling wheel 331 (such as a bearing roller) is rotatably installed at the corresponding part of the movable mechanism 4. When the movable mechanism 4 is driven by the wheel 31 to revolve around the positioning shaft 30, the traveling wheel 331 always maintains contact with the surface of the guide rail 330 and rolls along its undulating profile. Since the guide rail 330 is fixed, the height of its profile along the circumferential direction (corresponding to the revolution path) (along the axis L1 direction) varies. When the traveling wheel 331 rolls along the undulating guide rail 330 during the revolution with the movable mechanism 4, the traveling wheel 331 itself will generate a vertical displacement relative to the positioning shaft 30. This displacement is directly transmitted to the movable mechanism 4, thereby forcing the movable mechanism 4 as a whole to produce precise lifting and lowering movements along the axis L1. The higher sections of the guide rail 330 correspond to the higher positions of the movable mechanism 4 (such as the transfer stroke), while the lower sections correspond to the lower positions of the movable mechanism 4 (such as the bottle gripping and capping stations). Throughout the entire work cycle, the rotary wheel 31 provides continuous revolution power, and the cooperation between the traveling wheel 331 and the guide rail 330 converts this revolution into a preset lifting trajectory. Therefore, the lifting action of the movable mechanism 4 strictly corresponds to the revolution angle position and is executed automatically, without the need for a separate lifting drive motor. This lifting motion, in conjunction with the rotational motion generated by the first transmission module 32, ensures that the pressure head 40 performs capping in the correct spatial position.

[0071] The engagement between the traveling wheel 331 and the guide rail 330 is a mandatory mechanical constraint. The lifting position of the movable mechanism 4 is uniquely determined by its angular position on the revolution circle, and its motion trajectory remains constant. This allows the entire lifting process to operate stably in a completely open-loop manner, simplifying the control system. Compared with transmission methods such as lead screws and synchronous belts, the rolling contact pair formed by the guide rail 330 and the traveling wheel 331 can withstand larger radial forces and overturning moments, providing stable support for the movable mechanism 4 under stress conditions such as gripping and capping, ensuring smooth movement.

[0072] In practice, the undulating working surface of the guide rail 330 is equipped with a centralized lubrication system or a self-lubricating coating to ensure smooth long-term operation. At the same time, cleaning devices such as brushes or air curtains can be installed to prevent dust or foreign objects from adhering to the surface of the guide rail 330, which would affect the rolling accuracy of the traveling wheel 331 and the life of the guide rail 330.

[0073] According to some embodiments of this application, optionally, such as Figure 2As shown, the guide rail 330 includes a steep section 3300 and a gentle section 3301. The steep section 3300 is closer to the bottle body 10 than the gentle section 3301. The radial angle between the steep section 3300 and the positioning axis 30 is greater than the radial angle between the gentle section 3301 and the positioning axis 30. In the extension direction, the length of the steep section 3300 is less than the length of the gentle section 3301.

[0074] In the illustrative application process, the steep section 3300 corresponds to the tightening process. When the traveling wheel 331 is running in this section, the moving mechanism 4 is undergoing a controlled and continuous axial (along the axis L1 direction) displacement while revolving. The slow section 3301 corresponds to the gripping, alignment, and initial vacuuming stages before tightening, as well as the holding and releasing actions after tightening, which require highly stable preparation and completion.

[0075] In the steep section 3300, the large included angle of the guide rail 330 forces the moving mechanism 4 to continuously and slowly feed downwards along the bottle opening axially while rotating the bottle cap 11. This means that the rotation of the cap and the axial pressing are two synchronous and coupled active actions. The continuous and controllable axial feeding force ensures that the sealing gasket of the bottle cap 11 is always evenly pressed against the sealing surface of the bottle opening during the tightening process, unaffected by thread machining errors or slight differences in the height of the bottle opening, thus forming a reliable seal. The final tightening torque is the result of the combined effect of rotational resistance and axial feeding force. By designing the profile (including angle and length) of the steep section 3300, an ideal rotational pressing curve can be set. When the preset torque is reached, the bottle cap 11 is just screwed into place, and the sealing surface receives the best pressing force, avoiding the lack of axial follow-up after pure rotation into place, or the over-rotation phenomenon that occurs in pursuit of torque.

[0076] Before entering the steep section 3300 to begin tightening, the slow section 3301 provides a stable and undisturbed environment for the airbag 42 to hold the bottle body 10, for the electromagnet 400 (or armature block 43) to attract and align the bottle cap 11, and for the establishment of initial negative pressure. When the traveling wheel 331 leaves the steep section 3300 (tightening completed) and enters the next slow section 3301, the mechanism returns to a high degree of stability. At this time, a brief torque holding and vacuum confirmation can be performed, and then the release actions such as airbag 42 deflating and pressure head 40 rising are smoothly executed.

[0077] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rotary vacuum capping device, characterized in that, include: A conveying mechanism for conveying bottles along a conveying route, with bottle caps placed on the bottles; The driving mechanism and the movable mechanism are provided. The driving mechanism drives the movable mechanism to revolve around axis L1 and rotate on its own axis, while simultaneously driving its lifting and lowering. The active mechanism is equipped with a pressure head and a sleeve fitted on the outside of the pressure head. The inner side of the sleeve is provided with an air bladder for holding the bottle body tightly. The pressure head is used to press and rotate the bottle cap. A guide element is used to limit the rotation of the sleeve; The conveying route partially overlaps with the revolution route of the moving mechanism, enabling the sleeve to carry the bottle away from the conveying route for capping and release the bottle back after completion. The pressure head is also equipped with an electromagnet, which is used to attract the bottle cap before pressing it, so that the bottle cap is in contact with the bottom surface of the pressure head, thereby achieving parallel alignment between the bottle cap and the bottle mouth.

2. The rotary vacuum capping device according to claim 1, characterized in that, The active mechanism also includes an armature block; The armature block cooperates with the electromagnet to descend and approach or contact the bottle cap when the electromagnet is de-energized, and attracts the bottle cap when the electromagnet is energized, so that the bottle cap is attached to the bottom surface of the armature block and rises with it.

3. The rotary vacuum capping device according to claim 2, characterized in that, The projection of the bottle cap onto the armature block is within the range of the armature block; The edge of the surface of the armature block that is in contact with the bottle cap is provided with an elastic positioning ring that protrudes toward the bottle cap. The pressure head has a wedge-shaped block on its edge region facing the bottle cap surface; When the bottle cap is in contact with the armature block, the positioning ring is positioned around the bottle cap; when the armature block rises, the wedge block pushes the positioning ring to deform toward the bottle cap, so as to clamp the bottle cap.

4. The rotary vacuum capping device according to claim 3, characterized in that, The positioning ring includes an elastic inner ring and a rigid outer ring, and a through hole is provided between the inner ring and the outer ring for the wedge block to extend into. The outer circumferential surface of the outer ring slides in contact with the inner wall of the sleeve.

5. A rotary vacuum capping device according to claim 1, characterized in that, It also includes a vacuum generating device, used to generate negative pressure within the sealed space formed by the sleeve, pressure head, air bladder and bottle body.

6. A rotary vacuum capping device according to claim 5, characterized in that, The airbag is fitted onto the outside of the bottle body that extends into the sleeve; The airbag slides into the inner wall of the sleeve via a sliding part, and the sleeve is provided with a groove for engaging with the sliding part to restrict the rotation of the sliding part; A sealing element is provided between the sliding part and the inner wall of the sleeve; The airbag is connected to an air tube, and an air pump is installed on the air tube. The air pump controls the expansion or contraction of the airbag by drawing air into or inflating it, thereby tightening or loosening the bottle.

7. A rotary vacuum capping device according to claim 1, characterized in that, The drive mechanism includes: A positioning shaft and a rotating wheel, wherein the rotating wheel is sleeved on the positioning shaft and rotates around the axis L1 of the positioning shaft under the drive of a rotating motor; The movable mechanism is vertically mounted on the rotating wheel and revolves around the positioning axis under the drive of the rotating wheel; The first transmission module is used to drive the movable mechanism to rotate. The second transmission module is located on the outer circumferential surface of the positioning shaft and is used to drive the movable mechanism to move up and down along the axis L1.

8. A rotary vacuum capping device according to claim 7, characterized in that, The first transmission module includes a main gear and planetary gears that mesh with each other; The main gear is sleeved on the positioning shaft; The planetary gear is sleeved on the outside of the movable mechanism and rotates synchronously with the movable mechanism.

9. A rotary vacuum capping device according to claim 7, characterized in that, The second transmission module includes guide rails and wheels; The guide rail is arranged along the outer circumferential surface of the positioning axis; The walking wheels are rotatably mounted on the movable mechanism and cooperate with the guide rail; The guide rail undulates along axis L1 to guide the moving mechanism up and down.

10. A rotary vacuum capping device according to claim 7, characterized in that, The guide rail includes a steep section and a gentle section, with the steep section being closer to the bottle than the gentle section; The angle between the steep section and the radial direction of the positioning axis is greater than the angle between the slow section and the radial direction of the positioning axis; In the direction of extension, the length of the steep section is less than the length of the slow section.

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