Servo cap screwing device for caps

Abstract

The utility model discloses a servo cap screwing device for caps, which belongs to the technical field of servo cap screwing devices and comprises a frame and height adjusting servo motors mounted on two sides of the top end face of the frame, linear guide rails corresponding to the height adjusting servo motors are fixed on the inner wall of the frame, and the height adjusting servo motors are fixed on the linear guide rails. A cap screwing bearing seat is connected to the linear guide rail in a sliding mode, a cap screwing head is arranged below the cap screwing bearing seat, a steering servo motor used for driving the cap screwing head to rotate is installed at the top end of the cap screwing bearing seat, and a height adjusting servo motor drives the cap screwing bearing seat to ascend and descend through a driving mechanism. According to the servo cap screwing device for the cap, the current torsion is fed back in real time through the steering servo motor, when the set torsion is reached, the steering servo motor stops rotating, the cap screwing head stops moving, the torque of the cap screwing head can be adjusted without stopping the machine to adjust the current of the steering servo motor, and the convenience of torque adjustment of the cap screwing head is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of servo capping device, specifically relating to a servo capping device for caps. Background Technology

[0002] A capping device is a sealing and packaging machine used to press and screw caps onto various bottles containing contents. It is commonly found in various production lines, especially filling production lines. Currently, capping devices are divided into two types: one is a capping device with a mechanical clutch, and the other is a capping device using magnetic coupling.

[0003] Mechanical clutch capping devices control the capping force by adjusting the spring pressure. However, this method is not precise in torque adjustment. If a machine has multiple capping heads, adjusting the torque will take a lot of time, and the torque will change due to the plastic deformation of the spring. Under the pressure of the spring, the capping head is prone to wear. Magnetic coupling capping devices are an upgrade from mechanical clutches, eliminating the spring and replacing it with a permanent magnet. This eliminates friction in the capping head and improves its durability. However, once the permanent magnet is demagnetized, the torque will change, and adjusting the torque also requires a lot of time for each adjustment. Neither of these two capping devices can achieve dynamic torque adjustment without stopping the machine during production. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a servo capping device for lids. This servo capping device for lids aims to solve the technical problem that existing capping devices cannot achieve dynamic adjustment of torque without stopping production, and that torque adjustment will take a lot of time.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a servo capping device for lids. The servo capping device for lids includes a frame and height adjustment servo motors installed on both sides of the top surface of the frame. The inner wall of the frame is fixed with linear guide rails corresponding to the height adjustment servo motors. A capping bearing seat is slidably connected to the linear guide rail. A capping head is provided below the capping bearing seat, and a steering servo motor for driving the capping head to rotate is installed at the top of the capping bearing seat. The height adjustment servo motor drives the capping bearing seat to rise and fall through a drive mechanism.

[0008] When using this technical solution, the capping device is fixed to the machine base by setting up a height adjustment servo motor and a steering servo motor. When the machine base's dividing turntable transports the workpiece to directly below the capping head, the positioning pin executes the cylinder push rod to push forward, causing the workpiece positioning pin to move forward and position the workpiece. The height adjustment servo motor drives the lead screw to rotate forward, and the rotation of the lead screw causes it to drive the capping bearing seat to move downward in a linear motion. At the same time, the steering servo motor drives the capping shaft and the capping head to rotate. When the cap is put into the capping head, the capping head will drive the cap to rotate. At this time, the steering servo motor provides real-time feedback on the current torque. When the set torque is reached, the steering servo motor stops rotating, the capping head stops moving, and the height adjustment servo motor rotates in the opposite direction, lifting the capping head to the high position. This eliminates the need to stop the machine to adjust the torque of the capping head by adjusting the current of the steering servo motor, thus improving the convenience of torque adjustment. By setting axial positioning teeth in the cavity at the bottom of the capping head, the groove on the bottle cap engages with the axial positioning teeth at the bottom of the capping head. At the same time, when the bottle cap is inserted into the bottom of the capping head, it pushes the lifting tube to slide upward, improving the stability of the axial connection between the capping head and the bottle cap. This method is suitable for positioning and screwing bottle caps of different heights.

[0009] Preferably, protective plates are fixedly installed at both ends of the frame, and origin sensors are fixedly installed on the side walls of the protective plates.

[0010] Furthermore, the top of both the frame and the cap bearing seat are fixed with mounting rods in a rectangular array, and the mounting rods are respectively connected to the height adjustment servo motor and the steering servo motor.

[0011] Furthermore, the drive mechanism includes a threaded connector embedded in the cap bearing housing and a ball screw rotatably mounted in the frame, the ball screw being threadedly inserted into the threaded connector.

[0012] Furthermore, a first coupling is installed at the bottom of the steering servo motor, and a second coupling connected to a ball screw is installed at the bottom of the height adjustment servo motor. A capping rod connected to a capping head is fixed at the bottom of the first coupling.

[0013] Furthermore, a positioning pin actuation cylinder is symmetrically fixed at the bottom of the frame, and a workpiece positioning pin that is slidably inserted into the frame is mounted on the positioning pin actuation cylinder.

[0014] Furthermore, the cavity at the bottom of the capping head is provided with multiple axial positioning teeth arranged in a ring array, and a lifting tube is slidably inserted into the top of the capping head.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention features a height adjustment servo motor and a steering servo motor. The capping device is fixed to the machine base. When the machine base's dividing turntable transports the workpiece to directly below the capping head, the positioning pin pushes the cylinder rod forward, causing the workpiece positioning pin to move forward and position the workpiece. The height adjustment servo motor drives the lead screw to rotate forward, and the rotation of the lead screw drives the capping bearing seat to move downward in a straight line. At the same time, the steering servo motor drives the capping shaft and the capping head to rotate. When the cap is placed inside the capping head, the capping head will drive the cap to rotate. At this time, the steering servo motor provides real-time feedback on the current torque. When the set torque is reached, the steering servo motor stops rotating, the capping head stops moving, and the height adjustment servo motor rotates in the opposite direction, lifting the capping head to a high position. This eliminates the need to stop the machine to adjust the current of the steering servo motor to adjust the torque of the capping head, thus improving the convenience of capping head torque adjustment.

[0018] By providing axial positioning teeth in the cavity at the bottom of the capping head, the groove on the bottle cap engages with the axial positioning teeth at the bottom of the capping head. At the same time, when the bottle cap is inserted into the bottom of the capping head, it pushes the lifting tube to slide upward, which improves the stability of the axial connection between the capping head and the bottle cap. It is suitable for positioning and screwing bottle caps of different heights. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model;

[0023] Figure 4 This utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0024] The markings in the attached diagram are as follows: 1. Frame; 2. Protective plate; 3. First coupling; 4. Origin sensor; 5. Second coupling; 6. Height adjustment servo motor; 7. Steering servo motor; 8. Mounting rod; 9. Capping bearing seat; 10. Capping head; 11. Capping rod; 12. Ball screw; 13. Workpiece positioning pin; 14. Positioning pin actuator cylinder; 15. Linear guide rail; 16. Threaded connector; 17. Lifting tube; 18. Axial positioning gear. Detailed Implementation

[0025] 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.

[0026] This specific embodiment is a servo capping device for lids, and its structural schematic diagram is shown below. Figure 1 and Figure 2 As shown, the servo capping device for the lid includes a frame 1 and height-adjusting servo motors 6 installed on both sides of the top surface of the frame 1. A linear guide rail 15 corresponding to the height-adjusting servo motor 6 is fixed on the inner wall of the frame 1. A capping bearing seat 9 is slidably connected to the linear guide rail 15. A capping head 10 is provided below the capping bearing seat 9, and a steering servo motor 7 for driving the capping head 10 to rotate is installed at the top of the capping bearing seat 9. The height-adjusting servo motor 6 drives the capping bearing seat 9 to rise and fall through a drive mechanism. The torque control of the servo motor is realized through a servo controller. The parameter settings in the controller directly affect the torque output. Increasing the current gain can increase the output current of the motor, thereby increasing the torque. The way the servo controller controls the servo motor is existing technology and will not be described in detail here.

[0027] Protective plates 2 are fixedly installed at both ends of the frame 1. Origin sensors 4 are fixedly installed on the side walls of the protective plates 2. The origin sensor 4 is a sensor used to determine the starting position of a servo motor or mechanical axis. It is commonly used in servo systems to help the system find a fixed reference point, thereby achieving precise position control. Mounting rods 8 are fixed in a rectangular array at the top of both the frame 1 and the capping bearing seat 9. Multiple mounting rods 8 are respectively connected to the height adjustment servo motor 6 and the steering servo motor 7. The drive mechanism includes a threaded connector 16 embedded in the capping bearing seat 9 and a ball screw 12 rotatably mounted in the frame 1. The ball screw 12 is threaded into the threaded connector 16. This capping device is fixed to the machine base for use. The frame 1 is connected to the machine base, and the machine base and its accessories... The bottle-splitting turntable is existing equipment and is not shown in the figure. The height adjustment servo motor 6 drives the lead screw to rotate in the forward direction. The rotation of the lead screw causes the capping bearing seat 9 to move downward in a straight line. At the same time, the steering servo motor 7 drives the capping shaft and the capping head 10 to rotate. When the bottle cap is put into the capping head 10, the capping head 10 will drive the bottle cap to rotate. At this time, the steering servo motor 7 provides real-time feedback on the current torque. When the set torque is reached, the steering servo motor 7 stops rotating, the capping head 10 stops moving, and the height adjustment servo motor 6 rotates in the reverse direction to lift the capping head 10 to the high position.

[0028] like Figure 3 and Figure 4 As shown, a first coupling 3 is installed at the bottom of the steering servo motor 7, and a second coupling 5 connected to the ball screw 12 is installed at the bottom of the height adjustment servo motor 6. A capping rod 11 connected to the capping head 10 is fixed at the bottom of the first coupling 3. A positioning pin actuation cylinder 14 is symmetrically fixed at the bottom of the frame 1. A workpiece positioning pin 13 is slidably inserted into the frame 1 on the positioning pin actuation cylinder 14. When the machine table dividing turntable transports the workpiece to directly below the capping head 10, the positioning pin actuation cylinder 13 is activated. The cylinder 14 pushes the rod forward, causing the workpiece positioning pin 13 to move forward and position the workpiece. Multiple axial positioning teeth 18 are arranged in a circular array in the cavity at the bottom of the capping head 10, and a lifting tube 17 is slidably inserted into the top of the capping head 10. The groove on the bottle cap engages with the axial positioning teeth 18 at the bottom of the capping head. At the same time, when the bottle cap is inserted into the bottom of the capping head 10, it pushes the lifting tube 17 to slide upward, which improves the stability of the axial connection between the capping head 10 and the bottle cap. It is suitable for positioning and screwing bottle caps of different heights.

[0029] Working principle: When using the device of this technical solution, the capping device is fixed on the machine base. When the machine base's dividing turntable transports the workpiece to directly below the capping head 10, the positioning pin actuator cylinder 14 pushes the rod forward, causing the workpiece positioning pin 13 to move forward and position the workpiece. The height adjustment servo motor 6 drives the lead screw to rotate in the forward direction. The rotation of the lead screw drives the capping bearing seat 9 to move downward in a straight line. At the same time, the steering servo motor 7 drives the capping shaft and the capping head 10 to rotate. When the bottle cap is put into the capping head 10, the capping head 10 will drive the bottle cap to rotate. At this time, the steering servo motor 7 provides real-time feedback on the current torque. When the set torque is reached, the steering servo motor 7 stops rotating, the capping head 10 stops moving, and the height adjustment servo motor 6 rotates in the reverse direction, lifting the capping head 10 to a high position. There is no need to stop the machine to adjust the current of the steering servo motor 7 to adjust the torque of the capping head 10, which improves the convenience of torque adjustment of the capping head 10.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A servo capping device for a lid, the servo capping device for a lid comprising a frame (1) and height-adjustable servo motors (6) mounted on both sides of the top surface of the frame (1), characterized in that, The inner wall of the frame (1) is fixed with a linear guide rail (15) corresponding to the height adjustment servo motor (6). A capping bearing seat (9) is slidably connected on the linear guide rail (15). A capping head (10) is provided below the capping bearing seat (9). A steering servo motor (7) for driving the capping head (10) to rotate is installed at the top of the capping bearing seat (9). The height adjustment servo motor (6) drives the capping bearing seat (9) to rise and fall through the drive mechanism.

2. A servo capping device for a lid according to claim 1, characterized in that, Protective plates (2) are fixedly installed at both ends of the frame (1), and origin sensors (4) are fixedly installed on the side walls of the protective plates (2).

3. A servo capping device for a lid according to claim 1, characterized in that, The top of both the frame (1) and the cap bearing seat (9) are fixed with mounting rods (8) in a rectangular array. The mounting rods (8) are respectively connected to the height adjustment servo motor (6) and the steering servo motor (7).

4. A servo capping device for a lid according to claim 1, characterized in that, The drive mechanism includes a threaded connector (16) embedded in the cap bearing seat (9) and a ball screw (12) rotatably disposed in the frame (1), the ball screw (12) being threadedly inserted into the threaded connector (16).

5. A servo capping device for a lid according to claim 4, characterized in that, The bottom end of the steering servo motor (7) is equipped with a first coupling (3), and the bottom end of the height adjustment servo motor (6) is equipped with a second coupling (5) connected to the ball screw (12). The bottom end of the first coupling (3) is fixed with a capping rod (11) connected to the capping head (10).

6. A servo capping device for a lid according to claim 1, characterized in that, The bottom end of the frame (1) is symmetrically fixed with positioning pin actuator cylinders (14), and the positioning pin actuator cylinders (14) are equipped with workpiece positioning pins (13) that are slidably inserted into the frame (1).

7. A servo capping device for a lid according to claim 1, characterized in that, The capping head (10) has multiple axial positioning teeth (18) arranged in a ring array in the cavity at the bottom end, and a lifting tube (17) is slidably inserted into the top end of the capping head (10).

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