Cap screwing machine

Abstract

A cap screwing machine comprises a mounting frame. A lifting platform; the lifting driving mechanism is fixed on the mounting frame, is connected with the lifting platform through lead screw transmission and drives the lifting platform to move in the axial direction of the guide columns; the telescopic driving mechanisms are connected to the lifting platform, each telescopic driving mechanism comprises a mandrel which moves in the axial direction and is used for compensating axial movement in the cap screwing process, and a clamping jaw assembly is connected to the movable end of each mandrel; the clamping jaw assembly comprises a pre-tightening piece stretching out and drawing back in the axial direction of the mandrel, and when the clamping jaw assembly clamps the bottle cap, the pre-tightening piece applies acting force towards the bottle opening to the bottle cap. The bottle cap tightening device is compact and reasonable in structure and convenient to operate, and the bottle cap tightening efficiency is remarkably improved through accurate clamping design, adjustment in the vertical direction and flexible adaptability. The clamping problem of the bottle cap and the bottle opening in the prior art is solved, and the tight attaching effect of the bottle cap in the screwing process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a capping machine. Background Art

[0002] In modern industrial production, especially in industries such as pharmaceuticals, daily chemicals, food, and beverages, the bottle cap tightening mechanism is one of the key links in the production line. As a direct means of product sealing and protection, the tightening quality of the bottle cap directly affects the shelf life, safety, and consumer experience of the product. However, the existing bottle cap tightening technologies still face many challenges and defects in practical applications, which not only affect production efficiency but also may have an adverse impact on product quality.

[0003] Although existing technologies currently also use automated equipment, there are still the following defects in specific use:

[0004] 1. Problem of bottle cap and bottle mouth engagement: Before the bottle cap is tightened, due to various factors (such as vibration during transportation, dimensional deviation of the bottle cap, etc.), the bottle cap often fails to fully engage with the bottle mouth, that is, the bottle cap and the bottle mouth are not parallel. In this case, the bottle cap is difficult to be screwed into the bottle mouth smoothly, and may even cause damage to the tightening mechanism or the bottle cap to break. This engagement problem not only reduces the tightening efficiency but also increases the downtime and maintenance cost of the production line.

[0005] 2. During the bottle cap tightening process, ideally, the bottle cap should move vertically while rotating to ensure that the bottle cap can closely fit the bottle mouth and achieve the expected sealing effect. However, many existing tightening mechanisms only provide a rotational movement and ignore the vertical adjustment, which results in the bottle cap being unable to fully press against the bottle mouth, affecting the sealing performance. In addition, the lack of vertical movement may also cause the bottle cap to be damaged due to uneven stress during the tightening process.

[0006] Therefore, we propose a capping machine. Content of the Utility Model

[0007] The applicant of the present utility model aims at the above-mentioned disadvantages in the existing production technology and provides a capping machine, which not only solves the problem of bottle cap and bottle mouth engagement in the existing technology but also ensures the close fit and expected sealing effect of the bottle cap during the tightening process.

[0008] The technical solution adopted by the present utility model is as follows:

[0009] A capping machine, comprising:

[0010] A mounting frame;

[0011] A lifting platform, which is movably connected to the mounting frame through guide columns;

[0012] A lifting drive mechanism, which is fixed on the mounting frame and connected to the lifting platform through screw drive, driving the lifting platform to move axially along the guide column;

[0013] A telescopic drive mechanism, the number of which is multiple and is connected to the lifting platform, and the telescopic drive mechanism includes a mandrel that moves axially, used to compensate for the axial movement during the capping process, and a jaw assembly is connected to the movable end of the mandrel;

[0014] The jaw assembly includes a pre-tightening member that telescopically moves along the axial direction of the mandrel, and when the jaw assembly clamps the bottle cap, the pre-tightening member applies a force towards the bottle mouth to the bottle cap.

[0015] Furthermore, the mounting frame includes a first platform and a second platform that are parallel to each other, and the first platform and the second platform are connected to each other through a plurality of connecting columns.

[0016] Furthermore, the lifting drive mechanism includes:

[0017] A third platform, which is fixedly connected to the second platform;

[0018] A main drive structure, which is used to provide rotational driving force;

[0019] A driven structure, which is connected to the main drive structure through a transmission component;

[0020] A screw rod, which is docked with the driven structure, and the screw rod is connected to the lifting platform through a thread.

[0021] Furthermore, a drive shaft is sleeved on the mandrel, one end of the drive shaft is connected to the lifting platform, and the other end of the drive shaft is connected to the jaw assembly. The mounting frame also includes a plurality of rotary drive devices corresponding to the telescopic drive structure, which are connected to the drive shaft through a belt and pulley assembly, and the drive shaft and the belt and pulley assembly are connected by splines, that is, the belt and pulley assembly drives the drive shaft to rotate, and the belt and pulley assembly can move axially along the drive shaft.

[0022] Furthermore, a fixing mechanism is also included, which is used to fix the bottle body. The fixing mechanism includes:

[0023] A fixing platform;

[0024] Placing seats, the number of which corresponds to the telescopic drive mechanism and is on the same straight line, used to place the bottle body;

[0025] A fixing structure, which includes multiple pairs of drive rods that can telescopically clamp, and each pair of drive rods can fix the corresponding bottle body.

[0026] Furthermore, the jaw assembly includes a housing, the housing is movably and fixedly connected to the drive shaft, the mandrel passes through and is connected to the pre-tightening member, and a spring three is arranged at the connection between the pre-tightening member and the mandrel.

[0027] Further, a wedge block is connected to a side wall of a section of the mandrel located inside the housing. The housing includes at least two relatively movable jaws, and the middle of the jaws is connected to the housing through a rotating pin. One end of the jaws is embedded into the housing and connected with a top block, and the top block abuts against the wedge block, and the jaws are rotationally clamped as the wedge block moves up and down.

[0028] Further, one side of the jaws facing the housing is connected to the housing through a second spring, and when there is no external force, it drives the jaws to rotate outwards.

[0029] Further, the wedge block is movably connected to the mandrel within a certain stroke, and a first spring corresponding to the wedge block is sleeved on the mandrel.

[0030] Further, the telescopic driving mechanism includes a telescopic driving device, a driving end of the telescopic driving device is connected with an axial floating mechanism, and the driving shaft is connected to the axial floating mechanism of the telescopic driving device.

[0031] The beneficial effects of the present utility model are as follows:

[0032] The structure of the present utility model is compact and reasonable, and the operation is convenient. Through precise clamping design, vertical adjustment and flexible adaptability, the efficiency of screwing the bottle cap is significantly improved. It not only solves the problem of clamping between the bottle cap and the bottle mouth in the prior art, but also ensures the tight fit and expected sealing effect of the bottle cap during the screwing process.

[0033] At the same time, the present utility model also has the following advantages:

[0034] The present capping machine realizes precise clamping between the bottle cap and the bottle mouth through a carefully designed jaw assembly and a telescopic driving mechanism. The jaw assembly can adaptively adjust the position to ensure that the bottle cap and the bottle mouth are completely aligned before screwing, thus avoiding screwing failure or equipment damage caused by clamping problems.

[0035] During the screwing process of the present capping machine, not only a rotating action is provided, but also vertical adjustment is realized through the axial movement of the mandrel. This innovative design ensures that the bottle cap can closely fit the bottle mouth while rotating, achieving the expected sealing effect. Compared with the traditional screwing mechanism, the present capping machine significantly improves the sealing performance of the bottle cap and reduces product quality problems caused by poor sealing. At the same time, the vertical adjustment also reduces the risk of damage to the bottle cap due to uneven force during the screwing process, further improving the overall quality of the product.

[0036] The design of this capping machine fully considers the actual requirements of the production line. By combining the lifting drive mechanism and the telescopic drive mechanism, it realizes flexible adaptation to bottle bodies of different heights. This feature enables the capping machine to be widely applied to bottle bodies of various specifications and shapes, improving the compatibility and flexibility of the production line. Brief Description of the Drawings

[0037] Figure 1 It is a schematic structural diagram of the present utility model.

[0038] Figure 2 It is the front view of the present utility model.

[0039] Figure 3 It is Figure 2 the side view of

[0040] Figure 4 It is Figure 3 the sectional view of the A-A section in

[0041] Figure 5 It is Figure 4 the partial enlarged view of part B in

[0042] Wherein:

[0043] 100, mounting frame; 200, lifting platform; 300, lifting drive mechanism; 400, telescopic drive mechanism; 500, fixing mechanism; 600, rotary drive device;

[0044] 101, platform one; 102, platform two; 103, connecting column;

[0045] 301, platform three; 302, main drive structure; 303, driven structure; 304, screw drive assembly;

[0046] 401, telescopic drive device; 402, drive shaft; 403, jaw assembly; 4011, axial floating mechanism; 4012, mandrel; 4021, wedge block; 4022, spring one; 4031, jaw; 4032, pre-tightening member; 40311, top block; 40312, rotating pin; 40313, spring two; 40321, spring three;

[0047] 501, fixed platform; 502, placement seat; 503, fixing structure; 601, belt pulley assembly. Detailed Embodiment

[0048] The following combines the drawings to illustrate the detailed embodiment of the present utility model.

[0049] The present utility model aims to solve the defects existing in the existing bottle cap tightening technology, and provides a capping machine which can ensure the accurate engagement of the bottle cap and the bottle mouth, and realize appropriate vertical movement during the tightening process to improve the tightening quality and production efficiency.

[0050] As Figures 1 - 5 shown, this embodiment discloses a capping machine, which mainly includes a mounting frame 100, a lifting platform 200, a lifting drive mechanism 300, a telescopic drive mechanism 400 and a fixing mechanism 500.

[0051] Specifically, in this embodiment, as Figure 1 shown, the mounting frame 100 is the main support structure of the capping machine, which includes a platform one 101 and a platform two 102 that are parallel to each other. The platform one 101 and the platform two 102 are connected to each other through a plurality of connecting columns to form a stable support frame. This design ensures the stability and reliability of the capping machine during the working process.

[0052] The lifting platform 200 is movably connected to the mounting frame 100 through guide columns. It can move along the axial direction of the guide columns to adapt to bottle bodies of different heights. The movement of the lifting platform 200 is controlled by the lifting drive mechanism 300, ensuring precise position adjustment during the bottle cap tightening process.

[0053] As Figures 1 - 3 shown, the lifting drive mechanism 300 is fixed to the mounting frame 100 and is connected to the lifting platform 200 through a screw drive. It mainly includes a platform three 301, a main drive structure 302, a driven structure 303 and a screw 304. The platform three 301 is fixedly connected to the platform two 102, providing stable support for the main drive structure 302 and the driven structure 303. The main drive structure 302 is used to provide rotational driving force and is connected to the driven structure 303 through a transmission component. The screw 304 is docked with the driven structure 303 and is threadedly connected to the lifting platform 200. When the main drive structure 302 works, it drives the driven structure 303 to rotate through the transmission component, and then makes the screw 304 rotate, driving the lifting platform 200 to move along the axial direction of the guide columns. Through a large stroke displacement, it is convenient to dock with the bottle mouth of the packaging bottle, and at the same time, the bottle cap can be tightened for packaging bottles of different heights by controlling the lifting distance.

[0054] As Figure 4As shown, the number of telescopic drive mechanisms 400 is multiple and they are connected to the lifting platform 200. In this embodiment, four are taken as an example, and the specific number is not limited. It mainly includes a telescopic drive device 401, an axial floating mechanism 4011, a drive shaft 402 and a core shaft 4012. The drive end of the telescopic drive device 401 is connected with the axial floating mechanism 4011, enabling the drive shaft 402 to axially float within a certain range, making the acting force more flexible and avoiding excessive acting force. One end of the drive shaft 402 is connected to the lifting platform 200, and the other end is connected to the jaw assembly 403. The core shaft 4012 is sleeved on the drive shaft 402 and can move axially to compensate for the axial movement during the capping process.

[0055] As Figure 1 shown, it further includes a fixing mechanism 500. The fixing mechanism 500 is used to fix the bottle body and mainly includes a fixing platform 501, a placement seat 502 and a fixing structure 503. The fixing platform 501 provides stable support. The number of placement seats 502 corresponds to that of the telescopic drive mechanisms 400 and they are on the same straight line for placing the bottle body. The fixing structure 503 includes multiple pairs of drive rods that can telescopically clamp, and each pair of drive rods can fix the corresponding bottle body to ensure the stability of the bottle body during the capping process.

[0056] As Figure 4 and Figure 5 shown, the jaw assembly 403 in this embodiment is one of the key components of the capping machine of the present utility model. It mainly includes components such as a housing, a core shaft 4012, a pre-tightening member 4032 and jaws 4031.

[0057] The housing is the main part of the jaw assembly 403, and it is movably and fixedly connected to the drive shaft 402. The interior of the housing is designed with a receiving space and a guiding structure for installing and guiding other components.

[0058] The core shaft 4012 passes through the housing and is connected to the pre-tightening member 4032. It can move axially to compensate for the axial movement during the capping process. A wedge block 4021 is also connected to a section of the side wall of the core shaft 4012 located inside the housing for realizing the rotational clamping of the jaws 4031.

[0059] The pre-tightening member 4032 is sleeved on the core shaft 4012 and can axially expand and contract along the core shaft 4012. A spring three 40321 is provided at the connection between it and the core shaft 4012 for providing a pre-tightening force. When the jaw assembly 403 clamps the bottle cap, the pre-tightening member 4032 exerts a force towards the bottle mouth on the bottle cap, making the bottle cap fit tightly with the bottle mouth.

[0060] The jaw 4031 is the clamping component of the jaw assembly 403, which mainly includes a clamping portion and a connecting portion. The clamping portion is used to clamp the bottle cap, and the connecting portion is connected to the housing through a rotating pin 40312. The middle of the jaw 4031 is movably connected to the housing through the rotating pin 40312, enabling the jaw 4031 to rotate around the rotating pin 40312. One end of the jaw 4031 is embedded in the housing and connected with a top block 40311, and the top block 40311 abuts against the wedge block 4021. When the wedge block 4021 moves up and down, the top block 40311 will be subjected to the thrust or pull of the wedge block 4021, thereby driving the jaw 4031 to rotate around the rotating pin 40312 to achieve the action of clamping or loosening the bottle cap.

[0061] The second spring 40313 is connected between the side of the jaw 4031 facing the housing and the housing. When there is no external force, the second spring 40313 will drive the jaw 4031 to rotate outwards, making the jaw 4031 in a loosened state. In this way, before clamping the bottle cap, the jaw 4031 will not interfere with the placement and positioning of the bottle cap.

[0062] The first spring 4022 is sleeved on the mandrel 4012 and is arranged corresponding to the wedge block 4021. It is used to provide the elastic force for the reset of the wedge block 4021. When the wedge block 4021 moves under the action of an external force, the first spring 4022 will deform and store elastic force. When the external force disappears, the first spring 4022 will release the elastic force to make the wedge block 4021 reset to the initial position.

[0063] The working principle of a capping machine of the present utility model is as follows:

[0064] First, place the bottle body with the bottle cap to be tightened on the placement seat 502 of the fixing mechanism 500 and fix it through the driving rod of the fixing structure 503. Then, the lifting drive mechanism 300 starts to work, drives the lifting platform 200 to move axially along the guide column through the screw drive, so that the jaw assembly 403 of the telescopic drive mechanism 400 aligns with the bottle mouth.

[0065] Next, the telescopic drive device 401 of the telescopic drive mechanism 400 starts to work, drives the mandrel 4012 to move towards the bottle mouth through the telescopic drive device 401. At the same time, the pre-tightening member 4032 of the jaw assembly 403 applies a force towards the bottle mouth to the bottle cap, making the bottle cap fit tightly with the bottle mouth.

[0066] After the bottle cap fits with the bottle mouth, the rotary drive device 600 starts to work, drives the drive shaft 402 to rotate through the belt pulley assembly 601. Since the drive shaft 402 and the belt pulley assembly 601 are connected by splines, the belt pulley assembly 601 can move axially along the drive shaft 402, and at the same time drives the drive shaft 402 and the mandrel 4012 to rotate. In this way, the jaw assembly 403 can clamp the bottle cap and rotate it to tighten.

[0067] During the tightening process, since the mandrel 4012 can move axially, the axial movement during the capping process can be compensated, ensuring that the bottle cap can fit tightly against the bottle mouth and achieve the expected sealing effect. At the same time, the pre-tightening member 4032 of the jaw assembly 403 always exerts a force towards the bottle mouth on the bottle cap, maintaining the tight fit state between the bottle cap and the bottle mouth.

[0068] After the bottle cap is tightened, the telescopic driving device 401 of the telescopic driving mechanism 400 works in reverse, driving the driving shaft 402 and the mandrel 4012 away from the bottle mouth. At the same time, the lifting driving mechanism 300 also works in reverse, driving the lifting platform 200 to axially move back to its original position along the guide column. In this way, the tightening process of one bottle cap is completed.

[0069] The above description is an explanation of the present utility model, not a limitation thereof. The scope defined by the present utility model can be seen in the claims. Any form of modification can be made within the protection scope of the present utility model.

Claims

1. A capping machine, characterized in that: include: Mounting frame (100); A lifting platform (200) movably connected to the mounting frame (100) via a guide column; A lifting drive mechanism (300) is fixed on the mounting frame (100) and connected to the lifting platform (200) via a screw drive, driving the lifting platform (200) to move along the axial direction of the guide column; A plurality of telescopic drive mechanisms (400) are connected to the lifting platform (200), and the telescopic drive mechanism (400) comprises a core shaft (4012) that moves in an axial direction and is used to compensate for the axial movement during the capping process, and a clamping claw assembly (403) is connected to the movable end of the core shaft (4012); The clamping jaw assembly (403) comprises a pre-tightening member (4032) which is axially retractable along the core shaft (4012), and when the clamping jaw assembly (403) clamps the bottle cap, the pre-tightening member (4032) applies a force to the bottle cap towards the bottle mouth.

2. A capping machine as claimed in claim 1, characterized in that: The mounting frame (100) comprises a platform 1 (101) and a platform 2 (102) which are parallel to each other, and the platform 1 (101) and the platform 2 (102) are connected to each other via a plurality of connecting columns.

3. A capping machine as claimed in claim 2, characterized in that: The lifting drive mechanism (300) comprises: Platform three (301), which is fixedly connected to platform two (102); A main driving structure (302) for providing a rotational driving force; A driven structure (303) connected to the main driving structure (302) via a transmission assembly; The screw rod (304) is butt-jointed with the driven structure (303), and the screw rod (304) is connected to the lifting platform (200) via threads.

4. A capping machine as claimed in claim 1, characterized in that: The core shaft (4012) is sleeved with a drive shaft (402), one end of the drive shaft (402) is connected to the lifting platform (200), and the other end of the drive shaft (402) is connected to the clamping claw assembly (403). The mounting frame (100) also includes a plurality of rotating drive devices (600) corresponding to the telescopic drive mechanism (400), which are connected to the drive shaft (402) via a transmission pulley assembly (601), and the drive shaft (402) and the transmission pulley assembly (601) are spline-connected, that is, the transmission pulley assembly (601) drives the drive shaft (402) to rotate, and the transmission pulley assembly (601) can move axially along the drive shaft (402).

5. The capping machine according to claim 1, characterized in that: It also includes a fixing mechanism (500) for fixing the bottle body, and the fixing mechanism (500) includes: Fixed platform (501); The placement seats (502) have a corresponding number to the telescopic drive mechanisms (400) and are located on the same straight line, and are used to place the bottles; The fixing structure (503) comprises a plurality of pairs of drive rods capable of telescopic clamping, and each pair of drive rods can fix a corresponding bottle body.

6. A capping machine as claimed in claim 1, characterized in that: The clamping jaw assembly (403) comprises a shell, which is movably fixedly connected to the driving shaft (402); the core shaft (4012) passes through and is connected to the pre-tightening member (4032); and a spring three (40321) is provided at the connection between the pre-tightening member (4032) and the core shaft (4012).

7. A capping machine as claimed in claim 6, characterized in that: The core shaft (4012) is located on a side wall of the shell and is also connected to a wedge block (4021). The shell includes at least two relatively movable clamping jaws (4031), and the middle part of the clamping jaw (4031) is connected to the shell through a rotating pin (40312). One end of the clamping jaw (4031) is embedded in the shell and is connected to a top block (40311). The top block (40311) contacts the wedge block (4021) and realizes rotational clamping of the clamping jaw (4031) as the wedge block (4021) moves up and down.

8. A capping machine as claimed in claim 7, characterized in that: The side of the clamping jaw (4031) facing the housing is connected to the housing via a second spring (40313), and when no external force is applied, the clamping jaw (4031) is driven to rotate outward.

9. A capping machine as claimed in claim 8, characterized in that: The wedge block (4021) is movably connected to the core shaft (4012) within a certain stroke, and a spring 1 (4022) corresponding to the wedge block (4021) is sleeved on the core shaft (4012).

10. The capping machine according to claim 6, characterized in that: The telescopic drive mechanism (400) comprises a telescopic drive device (401), the driving end of the telescopic drive device (401) is connected to an axial floating mechanism (4011), and the driving shaft (402) is connected to the axial floating mechanism (4011) of the telescopic drive device (401).

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