Screw cap mechanism capable of being disassembled and replaced quickly

Abstract

The utility model relates to a cap screwing mechanism capable of being disassembled and replaced quickly. The cap screwing mechanism is used for solving the problems of sealing, efficiency and cap screwing head universality of a traditional cap screwing mode. The mechanism comprises a mounting base, a ball screw, a linear sliding rail, a cap screwing structure, a servo motor and the like. According to the cap screwing structure, the principle that silica gel is meshed with the appearance of a cap is utilized, and precise cap screwing and sealing are achieved through control of a servo motor. The cap screwing head has a quick-release quick-change self-locking function, and an inner hole of the silica gel contact block is conical and is in interference fit with the cap. During working, the dividing plate moves bottles to the cap screwing position, caps are screwed at the two stations at the same time, the bottle clamping air cylinder positions the bottles, the Z-axis servo motor controls the cap screwing assembly to descend, the cap screwing servo motor drives cap screwing, and the floating assembly guarantees the cap screwing quality. According to the mechanism, the cap screwing sealing effect, the production efficiency and the equipment maintenance convenience are improved, and the mechanism is suitable for cap screwing operation of various types of caps.

Description

Technical Field

[0001] This utility model belongs to the field of capping after filling, and particularly relates to a capping mechanism for quick disassembly and replacement. Background Technology

[0002] In modern industrial production, capping is an indispensable part of product packaging in many industries, and is widely used in food and beverage, pharmaceuticals and health products, and daily chemical and cosmetic products. With the continuous growth of market demand and the diversification of products, increasingly higher requirements are being placed on the performance and adaptability of capping equipment.

[0003] Traditional screw-on capping methods have gradually revealed numerous problems in practical applications. The clamping capping method, long used in the industry, has poor adaptability to the shape and material of caps. Caps for different products vary significantly in shape, size, and material, making it difficult for clamping capping methods to achieve precise matching. For example, in the pharmaceutical industry, some caps with special shapes or fragile materials are easily deformed during clamping, affecting not only their appearance but also their sealing performance, thus threatening the quality and shelf life of the medicine. In the daily chemical industry, for some caps with unique designs and irregular shapes, it is difficult to ensure stable clamping force and accurate rotation angle during clamping, easily leading to loose or crooked caps, increasing the risk of product leakage.

[0004] Furthermore, traditional capping equipment has significant shortcomings in the design of its capping heads. Most capping heads lack flexibility and versatility, often leading to complex and cumbersome adjustments when switching between different types of caps for production. This typically requires specialized technicians using specific tools for disassembly, replacement, and readjustment, which not only consumes considerable time and manpower but also causes production interruptions, severely impacting efficiency. Moreover, during long-term production, frequent contact and friction with the caps cause wear and tear on the capping head components, further reducing the accuracy and stability of capping.

[0005] Furthermore, traditional screw-on capping methods face significant challenges in achieving a good seal. Poor sealing can lead to serious problems such as product leakage and spoilage, directly impacting product quality and corporate reputation. Traditional clamp-on capping methods struggle to precisely control various parameters during the capping process, such as capping force, capping angle, and depth, making it impossible to ensure that every cap achieves an ideal seal. This limitation is particularly pronounced for products with extremely high sealing requirements, such as packaging flammable, explosive, sterile, or highly corrosive liquids, where traditional screw-on capping methods fail to meet stringent quality standards and safety regulations.

[0006] In summary, existing capping technologies have many shortcomings in terms of cap adaptability, capping head flexibility, and sealing effect control. There is an urgent need for an innovative capping mechanism to solve these problems and meet the high-efficiency, high-quality, and diversified needs of modern industrial production. Utility Model Content

[0007] The purpose of this utility model is to provide a quick-release and quick-change capping mechanism, aiming to solve the problems existing in the background art. To achieve this purpose, the technical solution adopted by this utility model is:

[0008] A quick-release capping mechanism includes a mounting base, a ball screw, a capping structure, a Z-axis motor mounting base, a first coupling, and a Z-axis lifting servo motor. The ball screw is installed inside the mounting base. The Z-axis lifting servo motor is mounted on the top of the mounting base via the Z-axis motor mounting base. The Z-axis lifting servo motor passes through the Z-axis motor mounting base and is connected to the first coupling installed inside the Z-axis motor mounting base. The top of the ball screw passes through the mounting base and is connected to the first coupling. The capping structure is mounted on the ball screw. The servo motor is used to control the ball screw, thereby controlling the lifting and lowering of the capping structure. The capping structure is used for capping bottles.

[0009] Preferably, the capping structure includes a capping servo motor, a second coupling, a motor mounting base, a floating shaft, a spring, a sleeve, a bit connecting shaft, a bit, a capping machine, and silicone. The motor mounting base is connected to a ball screw. The second coupling is installed inside the motor mounting base. The capping servo motor is installed on the top of the motor mounting base. The motor shaft of the capping servo motor passes through the motor mounting base and is installed inside the second coupling. The floating shaft passes through the bottom of the motor mounting base and is installed inside the second coupling. A spring is provided on the surface of the floating shaft, and a sleeve is provided on the outside of the spring. The bit is installed at the bottom of the floating shaft through the bit connecting shaft, and the silicone is installed at the bottom of the bit through the capping machine.

[0010] Preferably, the inner pore of the silicone is tapered.

[0011] Preferably, the mounting base is also equipped with a bottle positioning cylinder, which is installed below the ball screw and is used for positioning the bottle body.

[0012] Preferably, multiple linear guides are also installed around the ball screw, and the motor mounting base is also connected to the linear guides. The linear guides are used to assist the ball screw in driving the lifting and lowering of the cap structure.

[0013] The beneficial effects of this utility model are:

[0014] Superior capping and sealing performance: This capping mechanism, tailored to the cap's shape and material, utilizes the friction of a silicone block to engage with the cap's shape, achieving axial rotation and providing a self-locking and sealing effect. The silicone inner hole is tapered, providing an interference fit with the cap's shape. During the capping process, precise control of the servo motor torque and feedback force causes the capping assembly to float, rotating and pressing down simultaneously, maintaining consistent friction. This effectively prevents liquid leakage, extends product shelf life, and improves product quality.

[0015] Highly efficient capping operation and improved production efficiency: The indexing plate moves the bottle cap to the capping position, allowing for simultaneous capping at two stations, significantly reducing the capping time for a single bottle and improving overall production efficiency. Furthermore, the capper features a quick-release and quick-change design, allowing for easy and rapid replacement of the silicone sealant block when it wears down due to friction, reducing equipment maintenance time, ensuring production continuity, and further improving equipment utilization efficiency.

[0016] Precise and stable bottle positioning and capping control: After the bottle reaches the capping position, the bottle clamping cylinder positions itself according to the bottle's shape, ensuring the bottle's position remains stable during the capping process and guaranteeing precise capping. The Z-axis servo motor controls the capping assembly to move linearly downwards, with adjustable stroke to accommodate bottles and caps of different heights, making the capping operation more precise and reliable, and reducing the capping defect rate caused by differences in bottle and cap dimensions. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 Perspective view-A and cross-sectional view-B provided for embodiments of this utility model;

[0019] Figure 3 The diagram shows the screw cap structure-A and the overall structure diagram-B provided for embodiments of this utility model.

[0020] The following are the labeling elements in the figure:

[0021] 1. Mounting base; 2. Ball screw; 3. Capping structure; 301. Capping servo motor; 302. Second coupling; 303. Motor mounting base; 304. Floating shaft; 305. Spring; 306. Sleeve; 307. Bit connecting shaft; 308. Bit; 309. Capper; 310. Silicone; 4. Z-axis motor mounting base; 5. First coupling; 6. Z-axis lifting servo motor; 7. Bottle positioning cylinder; 8. Linear slide rail. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0026] like Figures 1-3 As shown, this utility model embodiment provides a quick-release and quick-change capping mechanism, including a mounting base 1, a ball screw 2, a capping structure 3, a Z-axis motor mounting base 41, a first coupling 5, and a Z-axis lifting servo motor 6. The ball screw 2 is installed inside the mounting base 1. The Z-axis lifting servo motor 6 is mounted on the top of the mounting base 1 through the Z-axis motor mounting base 41. The Z-axis lifting servo motor 6 passes through the Z-axis motor mounting base 41 and is connected to the first coupling 5 installed inside the Z-axis motor mounting base 41. The top of the ball screw 2 passes through the mounting base 1 and is connected to the first coupling 5. The capping structure 3 is mounted on the ball screw 2. The servo motor is used to control the ball screw 2, thereby controlling the lifting and lowering of the capping structure 3. The capping structure 3 is used for capping bottles.

[0027] In this embodiment, the capping structure 3 includes a capping servo motor 301, a second coupling 302, a motor mounting base 303, a floating shaft 304, a spring 305, a sleeve 306, a bit connecting shaft 307, a bit 308, a capping machine 309, and silicone 310. The motor mounting base 303 is connected to the ball screw 2. The second coupling 302 is installed inside the motor mounting base 303. The capping servo motor 301 is installed on the top of the motor mounting base 303. The motor shaft of the capping servo motor 301 passes through the motor mounting base 303 and is installed inside the second coupling 302. The floating shaft 304 passes through the bottom of the motor mounting base 303 and is installed inside the second coupling 302. A spring 305 is provided on the surface of the floating shaft 304. A sleeve 306 is provided on the outside of the spring 305. The bit 308 is installed at the bottom of the floating shaft 304 through the bit connecting shaft 307. The silicone 310 is installed at the bottom of the bit 308 through the capping machine.

[0028] In the embodiment, the inner hole of the silicone 310 is tapered.

[0029] In this embodiment, a bottle positioning cylinder 7 is also provided inside the mounting base 1. The bottle positioning cylinder 7 is installed below the ball screw 2 and is used for positioning the bottle body shape.

[0030] In this embodiment, multiple linear slide rails 8 are also installed around the ball screw 2, and the motor mounting base 303 is also connected to the linear slide rails 8. The linear slide rails 8 are used to assist the ball screw 2 in driving the lifting and lowering of the capping structure 3.

[0031] Working principle

[0032] Bottle positioning stage

[0033] When the bottle to be capped is conveyed to the working area of ​​the capping mechanism, the bottle positioning cylinder 7 inside the mounting base 1 is activated first. The bottle positioning cylinder 7 extends and precisely positions itself according to the outer contour of the bottle. Through close contact with the bottle, it ensures that the bottle will not shift or wobble during the subsequent capping process, thus providing a stable foundation for accurate capping.

[0034] Screw cap structure descent preparation

[0035] After the bottle is positioned, the Z-axis lifting servo motor 6, located on top of the Z-axis motor mounting base 41, begins to operate. The motor shaft of the Z-axis lifting servo motor 6 rotates, driving the first coupling 5 connected to it to rotate. Since the top of the ball screw 2 is connected to the Z-axis lifting servo motor 6 via the first coupling 5, the rotation of the first coupling 5 causes the ball screw 2 to begin rotating. With the assistance of multiple linear guides 8 installed around the ball screw 2, the motor mounting base 303 connected to the ball screw 2 begins to move downwards along the direction of the linear guides 8. The movement of the motor mounting base 303 causes the entire capping structure 3 to descend synchronously. The stroke of this descent can be precisely adjusted according to the actual height requirements of the bottle and cap, ensuring that the capping structure 3 can accurately approach the cap on the bottle.

[0036] Capping process

[0037] When the capping structure 3 descends to the appropriate position, i.e., when the capper 309 approaches the top of the cap, the capping servo motor 301 on the top of the motor mounting base 303 starts. The motor shaft of the capping servo motor 301 rotates, transmitting power to the floating shaft 304 through the second coupling 302, causing the floating shaft 304 to begin rotating. Since the bit 308 is mounted on the bottom of the floating shaft 304 through the bit connecting shaft 307, the bit 308 rotates synchronously. At the same time, the silicone 310 is mounted on the bottom of the bit 308 through the capping machine, and the inner hole of the silicone 310 is tapered, forming an interference fit with the shape of the cap. When the bit 308 rotates, friction is generated between the silicone 310 and the cap. Based on the principle of the silicone block's friction and the cap's shape engaging, the cap begins to rotate axially.

[0038] During the capping process, the spring 305 on the surface of the floating shaft 304 plays a crucial role. As the capping servo motor 301 continues to rotate, the Z-axis lifting servo motor 6 continues to control the downward movement of the capping structure 3 as a whole. At this time, the floating method adopted by the capping assembly ensures that the spring 305 is aligned with the rotating shaft (floating shaft 304). In this way, while the cap rotates, the capping structure 3 can rotate and press down simultaneously, always maintaining consistent friction between the silicone 310 and the cap. By precisely setting the torque parameters of the capping servo motor 301, and according to the specific requirements of the cap and bottle, such as the cap material, size, and sealing standards, the capping force and depth are precisely controlled, allowing the cap to gradually achieve the ideal self-locking function and sealing effect, ensuring that the contents of the bottle will not leak and effectively guaranteeing product quality.

[0039] Capping completed and components reset

[0040] Once the capping operation is complete and the cap is tightened to the required sealing standard, the Z-axis lifting servo motor 6 reverses, driving the ball screw 2 to rotate in the opposite direction. Under the coordinated action of the ball screw 2 and the linear slide rail 8, the motor mounting base 303 moves upward along the linear slide rail 8, causing the capping structure 3 to rise back to its initial position. Simultaneously, the bottle positioning cylinder 7 retracts, releasing the capped bottle, which can then be transported to the next workstation for subsequent packaging or processing operations. Throughout the entire process, all components work closely together, achieving efficient, precise, and stable capping operations. Furthermore, the quick-release and quick-change design of the capping head facilitates equipment maintenance and switching between capping operations for different types of caps, effectively improving production efficiency and equipment applicability.

[0041] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A quick-release and quick-change capping mechanism, characterized in that: The device includes a mounting base, a ball screw, a capping structure, a Z-axis motor mounting base, a first coupling, and a Z-axis lifting servo motor. The ball screw is installed inside the mounting base. The Z-axis lifting servo motor is mounted on top of the mounting base via the Z-axis motor mounting base. The Z-axis lifting servo motor passes through the Z-axis motor mounting base and is connected to the first coupling installed inside the Z-axis motor mounting base. The top of the ball screw passes through the mounting base and is connected to the first coupling. The capping structure is mounted on the ball screw. The servo motor controls the ball screw, thereby controlling the lifting and lowering of the capping structure. The capping structure is used for capping bottles.

2. The quick-release and quick-change capping mechanism according to claim 1, characterized in that: The capping structure includes a capping servo motor, a second coupling, a motor mounting base, a floating shaft, a spring, a sleeve, a bit connecting shaft, a bit, a capping machine, and silicone. The motor mounting base is connected to the ball screw. The second coupling is installed inside the motor mounting base. The capping servo motor is mounted on the top of the motor mounting base. The motor shaft of the capping servo motor passes through the motor mounting base and is installed inside the second coupling. The floating shaft passes through the bottom of the motor mounting base and is installed inside the second coupling. The spring is provided on the surface of the floating shaft, and the sleeve is provided on the outside of the spring. The bit is installed at the bottom of the floating shaft through the bit connecting shaft, and the silicone is installed at the bottom of the bit through the capping machine.

3. The quick-release and quick-change capping mechanism according to claim 2, characterized in that: The inner pore of the silicone is tapered.

4. The quick-release and quick-change capping mechanism according to claim 3, characterized in that: The mounting base is also equipped with a bottle positioning cylinder, which is installed below the ball screw and is used for positioning the bottle body.

5. The quick-release and quick-change capping mechanism according to claim 4, characterized in that: Multiple linear slide rails are also installed around the ball screw, and the motor mounting base is also connected to the linear slide rails. The linear slide rails are used to assist the ball screw in driving the lifting and lowering of the cap structure.

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