Cap screwing device of filling machine

Abstract

The utility model relates to a filling machine cap screwing device which comprises a driver, an output shaft and a cap screwing device, the upper end of the output shaft is fixedly connected with the output end of the driver, the cap screwing device is fixedly installed at the lower end of the output shaft, and the driver drives the output shaft to rotate and drives a rotary cap and a clamped bottle cap to be screwed tightly. The bottom of the contact rod makes contact with the top of a bottle cap, the bottle cap generates upward extrusion force on the bottom of the contact rod to push the contact rod to slide upwards along an inner hole of the fixing ring, when the contact rod moves upwards, the upper end of the inclined rod hinged to the surface of the contact rod synchronously moves upwards, and the lower end of the inclined rod drags the top of the clamping jaw to move towards the central axis. After the clamping jaw clamps the bottle cap, the driver drives the cap screwing device to rotate through the output shaft, the friction force between the clamping face and the surface of the bottle cap drives the bottle cap to rotate, and threaded screwing of the bottle cap and a bottle opening is achieved.

Description

Technical Field

[0001] This utility model relates to the field of capping equipment technology, specifically a capping device for a filling machine. Background Technology

[0002] In the packaging production line, the core function of the capping device of the filling machine is to achieve precise tightening of the cap and the bottle mouth. In the existing technology, the capping device mostly adopts a fixed specification of gripper structure. When facing caps of different diameters or heights, the machine needs to be stopped and the entire capping head replaced.

[0003] For example, the authorized patent document with application number CN202420009250.0 discloses a capping device for a filling machine. It includes a mounting bracket with a lifting support rod slidably connected thereon, and a cam assembly for driving the lifting support rod to move longitudinally reciprocally. A lifting mounting seat is installed on the top of the lifting support rod, and a capping shaft is rotatably connected thereon. A capping buffer assembly and a clamping component are installed on the capping shaft, and a rotary drive component and a drive pair are also included. A bottle rack structure is installed on the mounting bracket, and a turntable shaft is rotatably connected to the mounting bracket. A turntable assembly is connected to the turntable shaft, and a divider assembly is also included. A total drive assembly for driving the cam assembly and the divider assembly in linkage is also included. A positioning sleeve is fixed to the mounting bracket, and a positioning rod is telescopically inserted within the positioning sleeve. An adjustable positioning clamping assembly is installed on the positioning rod. This utility model has a reasonable structural design, secure clamping and positioning, and a high production yield.

[0004] The aforementioned patent has limitations on the specifications of the fixed grippers, making it impossible to achieve adaptive clamping of bottle caps of various sizes. It requires stopping the machine to replace the entire capping head. Therefore, we need to provide a capping device for a filling machine. Utility Model Content

[0005] The purpose of this utility model is to provide a capping device for a filling machine. By setting three grippers inside the capper, the contraction range of the grippers is automatically adjusted by the transmission component, which can adapt to bottle caps of different diameters and has strong compatibility. At the same time, the driver rotates the capper to rotate and tighten the fixed bottle cap, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a capping device for a filling machine, comprising:

[0007] The device includes a driver, an output shaft, and a cap screwdriver. The upper end of the output shaft is fixedly connected to the output end of the driver, and the cap screwdriver is fixedly installed at the lower end of the output shaft. The driver drives the output shaft to rotate, thereby rotating the cap and the clamped bottle cap to achieve tightening.

[0008] The capping device includes a sleeve, a fixing ring, grippers, and a transmission component. The outer edge of the fixing ring is welded to the middle of the inner wall of the sleeve. The three grippers are evenly distributed along the circumference of the sleeve. The upper part of each gripper is hinged to the bottom of the transmission component, and the lower part extends to the lower end opening of the sleeve. The inner side of the gripper is provided with a clamping surface.

[0009] Preferably, the transmission component includes a contact rod, an elastic part, and a diagonal rod. The contact rod is slidably mounted inside the fixed ring. Each of the three grippers has a diagonal rod hinged to its top. The upper end of the diagonal rod is hinged to the surface of the contact rod. When the bottom of the contact rod is squeezed by the bottle cap, the contact rod moves upward, and the diagonal rod drives the grippers to retract radially inward to clamp the bottle cap. The elastic part is sleeved on the surface of the contact rod and located between the floating plate and the fixed ring, and is used to reset the grippers.

[0010] Preferably, the elastic part includes a floating disk and a spring, the floating disk is fixedly sleeved on the surface of the contact rod at its axis, and the spring is located between the floating disk and the fixed ring, and the spring is movably sleeved on the surface of the contact rod.

[0011] Preferably, the outer edge of the floating disk has three guide grooves, and the inner wall of the sleeve is fixedly installed with guide strips that are adapted to the guide grooves to limit the movement trajectory of the floating disk.

[0012] Preferably, guide rods are fixedly installed on the opposite sides of the three grippers, and three guide cylinders are fixedly installed on the inner wall of the sleeve, with the guide rods of the grippers slidably disposed inside the guide cylinders.

[0013] Preferably, the gripper surface is provided with an adhesive layer to protect the bottle cap surface.

[0014] Preferably, the driver includes a torque drive unit and a cap screwing motor for screwing the cap into place without damage.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features three grippers inside the capper, which automatically adjust the contraction range of the grippers via a transmission component, making it compatible with bottle caps of different diameters. Simultaneously, the driver rotates the capper to tighten the fixed bottle cap. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional sectional view of the sleeve of this utility model;

[0019] Figure 3 The structure of this utility model Figure 2 Enlarged view of a portion of point A in the middle;

[0020] Figure 4 This is a perspective view of the elastic part of this utility model.

[0021] In the diagram: 1. Driver; 2. Output shaft; 3. Capping device; 31. Sleeve; 32. Retaining ring; 33. Gripper; 34. Transmission component; 341. Contact rod; 342. Elastic part; 3421. Floating disc; 3422. Spring; 343. Diagonal bar; 4. Guide groove; 5. Guide bar; 6. Guide rod; 7. Guide cylinder; 8. Adhesive layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a capping device for a filling machine, comprising:

[0024] The driver 1, output shaft 2, and cap screwdriver 3 are provided. The upper end of the output shaft 2 is fixedly connected to the output end of the driver 1, and the cap screwdriver 3 is fixedly installed at the lower end of the output shaft 2. The driver 1 drives the output shaft 2 to rotate, thereby rotating the cap and the clamped bottle cap to achieve tightening.

[0025] The capping device 3 includes a sleeve 31, a fixing ring 32, a gripper 33, and a transmission component 34. The outer edge of the fixing ring 32 is welded to the middle of the inner wall of the sleeve 31. The three grippers 33 are evenly distributed along the circumference of the sleeve 31. The upper part of each gripper 33 is hinged to the bottom of the transmission component 34, and the lower part extends to the lower end opening of the sleeve 31. The inner side of the gripper 33 is provided with a clamping surface.

[0026] Specifically, the capper 3 is equipped with three grippers 33. The contraction range of the grippers 33 is automatically adjusted by the transmission component 34, which can adapt to bottle caps of different diameters and has strong compatibility. At the same time, the driver 1 rotates the capper 3 to tighten the fixed bottle cap.

[0027] The transmission component 34 includes a contact rod 341, an elastic part 342, and a diagonal rod 343. The contact rod 341 is slidably installed inside the fixed ring 32. The top of each of the three grippers 33 is hinged with a diagonal rod 343. The upper end of the diagonal rod 343 is hinged to the surface of the contact rod 341. When the bottom of the contact rod 341 is squeezed by the bottle cap, the contact rod 341 moves upward, and the diagonal rod 343 drives the grippers 33 to retract radially inward to clamp the bottle cap. The elastic part 342 is sleeved on the surface of the contact rod 341 and is located between the floating disk 3421 and the fixed ring 32. It is used to reset the grippers 33.

[0028] Specifically, the contact rod 341 can slide within the fixed ring 32, and the upper ends of the three inclined rods 343 are hinged to the surface of the contact rod 341, while the lower ends of the three inclined rods 343 are respectively hinged to the top of the three grippers 33. Through the axial movement of the contact rod 341, the swing of the inclined rods 343 is driven, which is converted into the radial contraction of the grippers 33, realizing the automated operation of "force-bearing clamping and force-releasing reset". It can adapt to different bottle cap diameters without manual intervention. The precise clamping and tightening of the bottle cap is achieved through mechanical transmission. When the elastic part 342 is in action, when the bottom of the contact rod 341 is not squeezed by the bottle cap, the three grippers 33 are in a naturally open state, and there is a gap between the clamping surface and the outer diameter of the bottle cap, which facilitates the bottle cap to enter the lower opening of the sleeve 31.

[0029] The elastic part 342 includes a floating disk 3421 and a spring 3422. The floating disk 3421 is fixedly sleeved on the surface of the contact rod 341 at the axis, and the spring 3422 is located between the floating disk 3421 and the fixed ring 32. The spring 3422 is movably sleeved on the surface of the contact rod 341.

[0030] It should be noted that when the bottom of the contact rod 341 is not squeezed by the bottle cap, the three grippers 33 are in a naturally open state, with a gap between the gripping surface and the outer diameter of the bottle cap, which facilitates the bottle cap entering the lower opening of the sleeve 31. When the bottom of the contact rod 341 is squeezed by the bottle cap, the spring 3422 is compressed and generates an elastic reaction force. This reaction force is transmitted to the contact rod 341 through the floating plate 3421, so that the gripping force of the grippers 33 automatically matches the diameter of the bottle cap. This structure does not require sensors or complex control systems, and achieves self-adaptation through pure mechanical elastic feedback. The spring 3422 is made of 304 stainless steel, which extends its service life.

[0031] The floating disk 3421 has three guide grooves 4 on its outer edge, and a guide strip 5 adapted to the guide grooves 4 is fixedly installed on the inner wall of the sleeve 31 to limit the movement trajectory of the floating disk 3421.

[0032] It is worth noting that the guide groove 4 on the outer edge of the floating disk 3421 cooperates with the guide strip 5 on the inner wall of the sleeve 31 to limit the movement trajectory of the floating disk 3421 to a strict axial movement, so as to prevent the spring 3422 from deflecting when it is compressed, and ensure that the three grippers 33 contract synchronously, thus solving the problem of easy jamming in the existing spring 3422 structure.

[0033] Guide rods 6 are fixedly installed on the opposite sides of the three grippers 33, and three guide cylinders 7 are fixedly installed on the inner wall of the sleeve 31. The guide rods 6 of the grippers 33 are slidably disposed in the guide cylinders 7.

[0034] Among them, the guide rod 6 slides linearly in the guide cylinder 7, controlling the radial contraction / opening offset of the gripper 33 within ±0.2mm, avoiding the bottle cap clamping eccentricity caused by the shaking of the gripper 33. The three guide rods 6 are evenly distributed in a 120° circumferential direction with the guide cylinder 7, and the gripper 33 is subjected to symmetrical force when it moves radially.

[0035] The gripper 33 has an adhesive layer 8 on its gripping surface to protect the bottle cap surface;

[0036] Furthermore, the adhesive layer 8 protects the bottle cap surface and prevents packaging damage. The adhesive layer 8 uses a polyurethane adhesive layer with a Shore hardness of 60A. The surface of the adhesive layer is treated with micro-sandblasting to form a matte texture of Ra0.8μm, which increases the coefficient of friction.

[0037] The driver 1 includes a torque drive unit and a cap screwing motor, which is used to screw the bottle cap into place without damage;

[0038] The torque drive unit in the driver 1 can monitor the tightening resistance. The capping motor is used to rotate the cap. When the cap is tightened to the correct position, the torque reaches the set threshold. The driver 1 automatically adjusts the speed or stops to avoid over-tightening and damaging the cap or bottle opening.

[0039] The torque drive unit monitors the tightening resistance in real time. When the torque reaches the preset threshold, it triggers the motor to slow down or stop within 0.1 seconds.

[0040] The driver 1 involved in this application is implemented using existing mature technology and is connected to an external PLC controller and power supply. This is a conventional technical means in this field, so its specific circuit connection, control logic and working process will not be described in detail.

[0041] When the device is not in contact with the bottle cap, the transmission component 34 remains in its initial position under the action of the spring 3422, and does not push the gripper 33 to retract. The gripper 33 is in a naturally open state, and there is a gap between the gripping surface and the outer diameter of the bottle cap, which facilitates the bottle cap entering the lower opening of the sleeve 31. When the sleeve 31 moves down, the bottom of the contact rod 341 contacts the top of the bottle cap, and the bottle cap generates an upward squeezing force on the bottom of the contact rod 341, pushing the contact rod 341 to slide upward along the inner hole of the fixing ring 32. When the contact rod 341 moves upward, the upper end of the inclined rod 343 hinged to its surface moves upward synchronously, and the lower end of the inclined rod 343 pulls the top of the gripper 33 to move towards the central axis. 3. The upper part is hinged to the transmission component 34, and the lower part is pulled radially inward by the inclined rod 343, so that the clamping surface is tightly attached to the outer wall of the bottle cap. After the clamping jaw 33 clamps the bottle cap, the driver 1 drives the capping device 3 to rotate through the output shaft 2. The friction between the clamping surface and the bottle cap surface drives the bottle cap to rotate, so as to tighten the thread with the bottle mouth. After the capping action is completed, the driver 1 stops rotating, the output shaft 2 and the capping device 3 stop, the sleeve 31 moves upward, the squeezing force of the bottle cap on the contact rod 341 disappears, the spring 3422 returns to its deformation, pushes the floating disk 3421 and the contact rod 341 to return downward, and the inclined rod 343 drives the clamping jaw 33 to open radially outward, releasing the bottle cap.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A capping device for a filling machine, characterized in that, include: The driver (1), output shaft (2) and cap screwdriver (3) are provided. The upper end of the output shaft (2) is fixedly connected to the output end of the driver (1). The cap screwdriver (3) is fixedly installed at the lower end of the output shaft (2). The driver (1) drives the output shaft (2) to rotate, thereby rotating the cap and the clamped bottle cap to achieve tightening. The capping device (3) includes a sleeve (31), a fixing ring (32), a gripper (33) and a transmission component (34). The outer edge of the fixing ring (32) is welded to the middle of the inner wall of the sleeve (31). The three grippers (33) are evenly distributed along the circumference of the sleeve (31). The upper part of each gripper (33) is hinged to the bottom of the transmission component (34), and the lower part extends to the lower end opening of the sleeve (31). The inner side of the gripper (33) is provided with a clamping surface.

2. The capping device for a filling machine according to claim 1, characterized in that: The transmission component (34) includes a contact rod (341), an elastic part (342), and a diagonal rod (343). The contact rod (341) is slidably installed inside the fixed ring (32). The top of each of the three grippers (33) is hinged with a diagonal rod (343). The upper end of the diagonal rod (343) is hinged to the surface of the contact rod (341). When the bottom of the contact rod (341) is squeezed by the bottle cap, the contact rod (341) moves upward, and the diagonal rod (343) drives the grippers (33) to retract radially inward to hold the bottle cap. The elastic part (342) is sleeved on the surface of the contact rod (341) and is located between the floating disk (3421) and the fixed ring (32) for resetting the grippers (33).

3. The capping device for a filling machine according to claim 2, characterized in that: The elastic part (342) includes a floating disk (3421) and a spring (3422). The floating disk (3421) is fixedly sleeved on the surface of the contact rod (341) at the axis, and the spring (3422) is located between the floating disk (3421) and the fixed ring (32). The spring (3422) is movably sleeved on the surface of the contact rod (341).

4. The capping device for a filling machine according to claim 3, characterized in that: The floating disk (3421) has three guide grooves (4) on its outer edge, and a guide strip (5) adapted to the guide grooves (4) is fixedly installed on the inner wall of the sleeve (31) to limit the movement trajectory of the floating disk (3421).

5. A capping device for a filling machine according to claim 1, characterized in that: Each of the three grippers (33) has a guide rod (6) fixedly installed on the opposite side, and three guide cylinders (7) are fixedly installed on the inner wall of the sleeve (31). The guide rod (6) of the gripper (33) is slidably disposed in the guide cylinder (7).

6. A capping device for a filling machine according to claim 5, characterized in that: The gripper (33) has an adhesive layer (8) on its gripping surface to protect the bottle cap surface.

7. A capping device for a filling machine according to claim 1, characterized in that: The driver (1) includes a torque drive unit and a cap screwing motor for screwing the cap into place without damage.

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