Servo traction device

Abstract

The utility model relates to the technical field of traction devices, in particular to a servo traction device, which is characterized in that a lower trolley is arranged in a traction housing, a photoelectric bracket is arranged on the outer surface of the traction housing, a lead screw nut support is connected in the photoelectric bracket in a sliding manner, and the lead screw nut support slides left and right in a reciprocating manner. When the lead screw nut support slides left and right in a reciprocating mode, the traction swing arm is pulled through the driving connecting rod to rotate and swing in a reciprocating mode, in the swing process of the traction swing arm, left-right reciprocating sliding of the lead screw nut support is transmitted to the lower trolley through the driving connecting rod, and therefore left-right swing of the lower trolley is achieved. The rotating swing is converted into precise rotating swing, then the lower trolley is driven to stably swing left and right according to the track, it is guaranteed that the packaging bag can be accurately pulled to the next station according to the specified stroke, the strict requirement for position precision in the packaging process is met, and the consistency and quality stability of packaged products can be improved easily.

Description

TECHNICAL FIELD

[0001] The utility model relates to a traction device technical field, especially a kind of servo traction device. BACKGROUND

[0002] Servo traction device has important role in industrial automation packaging field, mainly applied to horizontal full-automatic packaging machine, responsible for the specified range of packaging bag is drawn to next station, realizes the automation of packaging process link, ensures that packaging work is efficient, in order to meet the large-scale production demand, current servo traction device usually needs following technology in practical application:

[0003] 1, high-precision power drive technology, can accurately control the speed, displacement and timing of traction action, ensure that packaging bag is accurately drawn in place;

[0004] 2, stable mechanical structure design, to withstand various stresses in the process of traction, ensure the stability and reliability of device operation.

[0005] At present, to realize the function of servo traction device, a variety of equipment and mode are adopted. Part of the device is combined by simple motor and connecting rod, uses the rotation of motor to drive connecting rod, and then realizes traction action. This way structure is relatively simple, but there are deficiencies in precision control. Some devices use more complex hydraulic system to provide power, although it can provide greater traction force, but the equipment cost is higher, and the maintenance is more complex. In addition, some devices use cam mechanism to control traction action, through the profile curve of cam to realize specific traction motion law, but the design and manufacture of cam need higher precision, and the adjustment flexibility is poor.

[0006] However, the above-mentioned mode has some outstanding problems. On the one hand, the adjustment function of existing device is generally not flexible and accurate enough, for example, the device combined by simple motor and connecting rod is difficult to finely adjust the traction stroke and swing angle, and cannot meet the diversified traction demand of different packaging bags, on the other hand, the stability of device is poor. Like the device using hydraulic system, although the power is strong, but the hydraulic components are prone to leakage problem, which affects the stable operation of device, and the cam mechanism device is prone to inaccurate traction action due to cam wear when running at high speed. These problems make it difficult to ensure the accuracy and stability of packaging bag traction, reduce the efficiency and quality of packaging production. INVENTION CONTENTS

[0007] To address the shortcomings of existing technologies, this utility model provides a servo traction device that solves the problem of insufficient flexibility and precision in the adjustment functions of such devices. For example, devices using a simple combination of a motor and a linkage struggle to finely adjust the traction stroke and swing angle, failing to meet the diverse traction needs of different packaging bags. Furthermore, the stability of these devices is often lacking. While hydraulic systems offer strong power, leaks in hydraulic components can affect stable operation. Cam mechanisms, on the other hand, are prone to inaccurate traction actions at high speeds due to cam wear. These issues compromise the accuracy and stability of packaging bag traction, reducing the efficiency and quality of packaging production.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A servo traction device includes a traction housing, a lower trolley disposed inside the traction housing, a photoelectric bracket disposed on the outer surface of the traction housing, a lead screw nut support slidably connected inside the photoelectric bracket, a swing arm support disposed at the lower end of the photoelectric bracket, a traction swing arm rotatably connected inside the swing arm support, a drive connecting rod rotatably connected inside the traction swing arm, and the drive connecting rod rotatably connected inside the lower trolley and the lead screw nut support.

[0010] Preferably, a motor support is fixedly connected inside the photoelectric bracket, a servo motor is provided on the outer surface of the motor support, and two bearing supports are fixedly connected to the outer surface of the photoelectric bracket.

[0011] Preferably, the two bearing supports are rotatably connected to a silver screw rod, the silver screw rod is disposed on the outer surface of the servo motor, the screw rod nut support is threadedly connected to the outer surface of the silver screw rod, and a rectangular through groove is provided inside the traction swing arm.

[0012] Preferably, an adjusting rod is provided inside the rectangular through groove, and a traction connecting rod is rotatably connected to the outer surface of the adjusting rod.

[0013] Preferably, the lower end of the adjusting rod is fixedly connected to an adjusting screw, which is located inside the traction swing arm.

[0014] Preferably, the outer surface of the traction swing arm is provided with an adjusting lock block, the adjusting screw is threadedly connected inside the adjusting lock block, and the outer surface of the adjusting lock block is provided with a limit support.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The left and right reciprocating sliding of the lead screw and nut support: When the lead screw and nut support reciprocates left and right, it will pull the traction swing arm to rotate and swing back and forth through the drive linkage. During the swinging process of the traction swing arm, the left and right reciprocating sliding of the lead screw and nut support will be transmitted to the lower trolley through the drive linkage, thereby realizing the left and right swinging of the lower trolley. This linear motion is transmitted to the traction swing arm through the drive linkage and converted into precise rotational swinging, which in turn drives the lower trolley to swing left and right stably according to the trajectory. This ensures that the packaging bag can be accurately pulled to the next station according to the specified stroke, meeting the strict requirements of the packaging process for positional accuracy, and helping to improve the consistency and quality stability of the packaged products.

[0017] 2. The position of the adjusting screw in the adjusting lock block can be adjusted by turning the adjusting screw, thereby adjusting the position of the adjusting rod in the rectangular through slot. When the adjusting rod rotates with the traction swing arm, it will push the slider connected to the end of the traction swing arm away from the sliding arm to slide on the surface of the limit support. The surface of the limit support is equipped with a slide rail. By adjusting the position of the adjusting rod in the rectangular through slot, the rotation swing angle of the traction swing arm can be finely adjusted, thereby realizing the fine adjustment of the single traction stroke path of the trolley. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is an exploded view of the servo motor connection of this utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 For the present utility model Figure 2 Enlarged view of section B in the middle.

[0023] Legend: 11. Traction cover; 12. Lower trolley; 13. Photoelectric bracket; 14. Screw nut support; 15. Swing arm support; 16. Traction swing arm; 17. Drive link; 18. Motor support; 19. Servo motor; 21. Bearing support; 22. Shangyin screw; 23. Rectangular through slot; 24. Adjusting rod; 25. Traction link; 26. Adjusting screw; 27. Adjusting lock block; 28. Limit support. Detailed Implementation

[0024] This application provides a servo traction device that effectively solves the problem that the adjustment function of such devices is generally not flexible and precise enough. For example, devices with a simple combination of a motor and a linkage are difficult to finely adjust the traction stroke and swing angle, and cannot meet the diverse traction needs of different packaging bags. On the other hand, the stability of the device is poor. Hydraulic systems, while powerful, are prone to leaks, affecting stable operation. Cam mechanisms, on the other hand, are susceptible to inaccurate traction due to cam wear at high speeds. These issues compromise the accuracy and stability of bag traction, reducing production efficiency and quality. The reciprocating sliding of the screw nut support drives the traction arm to rotate and swing back and forth via the drive link. This swinging motion transmits the reciprocating sliding motion of the screw nut support to the lower trolley, causing it to swing left and right. This linear motion is converted into precise rotational oscillation, ensuring the lower trolley swings stably along its trajectory. This guarantees the bag is accurately traction to the next station according to the specified travel distance, meeting the stringent positional accuracy requirements of the packaging process and contributing to improved product consistency and quality stability.

[0025] Example

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in this application embodiment effectively solves the problem that the adjustment function of the device is generally not flexible and precise enough. For example, the device with a simple combination of motor and linkage is difficult to finely adjust the traction stroke and swing angle, and cannot meet the diverse traction needs of different packaging bags. On the other hand, the stability of the device is poor. For example, the device using a hydraulic system, although powerful, is prone to leakage problems of hydraulic components, which affects the stable operation of the device. When the cam mechanism device is running at high speed, it is easy to cause inaccurate traction action due to cam wear. These problems make it difficult to guarantee the accuracy and stability of packaging bag traction, reducing the efficiency and quality of packaging production. The overall idea is as follows: A servo traction device includes a traction cover 11, a lower carriage 12 is arranged inside the traction cover 11, a photoelectric bracket 13 is arranged on the outer surface of the traction cover 11, a lead screw nut support 14 is slidably connected inside the photoelectric bracket 13, a swing arm support 15 is arranged at the lower end of the photoelectric bracket 13, a traction swing arm 16 is rotatably connected inside the swing arm support 15, a drive link 17 is rotatably connected inside the traction swing arm 16, and the drive link 17 is rotatably connected to the lower carriage 12. Inside the lead screw and nut support 14, a motor support 18 is fixedly connected inside the photoelectric bracket 13. A servo motor 19 is set on the outer surface of the motor support 18. The lead screw and nut support 14 slides left and right. When the lead screw and nut support 14 slides left and right, it will pull the traction swing arm 16 to rotate and swing back and forth through the drive link 17. During the swinging process, the traction swing arm 16 will transmit the left and right sliding of the lead screw and nut support 14 to the lower trolley 12 through the drive link 17, thereby realizing the left and right swing of the lower trolley 12. By swinging the lower trolley 12 left and right, the packaging bag is pulled to the next station according to the specified stroke. The whole device can be connected to the host control screen. The host control screen will control the forward and reverse rotation, speed and other parameters of the output shaft of the servo motor 19 through the connection of PLC, thereby adjusting the overall traction stroke and traction timing parameters of the lower trolley 12.

[0027] Two bearing supports 21 are fixedly connected to the outer surface of the photoelectric bracket 13. The upper silver lead screw 22 is rotatably connected inside the two bearing supports 21. The upper silver lead screw 22 is set on the outer surface of the servo motor 19. The lead screw nut support 14 is threadedly connected to the outer surface of the upper silver lead screw 22. When the servo motor 19 installed in the motor support 18 is started, the output shaft of the servo motor 19 will drive the upper silver lead screw 22 to rotate. The rotation of the upper silver lead screw 22 will drive the lead screw nut support 14 threadedly connected to it to slide left and right. When the lead screw nut support 14 slides, it will pull the traction swing arm 16 to rotate and swing through the drive linkage 17 rotatably connected to it. By controlling the forward and reverse rotation of the output shaft of the servo motor 19, the left and right reciprocating sliding of the lead screw nut support 14 can be realized.

[0028] A rectangular through slot 23 is provided inside the traction arm 16. An adjusting rod 24 is installed inside the rectangular through slot 23. A traction connecting rod 25 is rotatably connected to the outer surface of the adjusting rod 24. An adjusting screw 26 is fixedly connected to the lower end of the adjusting rod 24. The adjusting screw 26 is located inside the traction arm 16. An adjusting locking block 27 is provided on the outer surface of the traction arm 16. The adjusting screw 26 is threaded into the adjusting locking block 27. A limit support 28 is provided on the outer surface of the adjusting locking block 27. After the limit support 28 is fixed, before the traction operation, the adjusting screw 26 and the adjusting locking block 27 are... The screw is threaded, and the position of the adjusting screw 26 in the adjusting lock block 27 can be adjusted by turning it, thereby adjusting the position of the adjusting rod 24 in the rectangular through slot 23. When the adjusting rod 24 rotates with the traction swing arm 16, it will push the slider connected to the end surface of the traction swing arm 16 away from the slider and slide it on the surface of the limiting support 28. The surface of the limiting support 28 is equipped with a slide rail. By adjusting the position of the adjusting rod 24 in the rectangular through slot 23, the rotation swing angle of the traction swing arm 16 can be finely adjusted, thereby realizing the fine adjustment of the single traction stroke path of the lower trolley 12.

[0029] To address the problems existing in the prior art, this utility model provides a servo traction device. The lead screw nut support 14 slides left and right reciprocatingly. When the lead screw nut support 14 slides left and right reciprocatingly, it pulls the traction swing arm 16 to rotate and swing back and forth via the drive link 17. During the swinging process, the traction swing arm 16 transmits the left and right reciprocating sliding of the lead screw nut support 14 to the lower carriage 12 via the drive link 17, thereby realizing the left and right swinging of the lower carriage 12. This linear motion is transmitted to the traction swing arm 16 via the drive link 17 and converted into precise rotational swinging, which in turn drives the lower carriage 12 to swing left and right stably along the trajectory. This ensures that the packaging bag can be accurately pulled to the next workstation according to the specified stroke, meeting the strict requirements for positional accuracy in the packaging process and helping to improve the consistency and quality stability of the packaged products.

[0030] Working principle:

[0031] The first step involves fixing the traction housing 11, the Shangyin lead screw 22, the swing arm support 15, and the limit support 28 to the traction housing 11 using screws. A slide rail is installed on the inner wall of the traction housing 11, and the lower trolley 12 slides on the slide rail surface. The servo motor 19 installed inside the motor support 18 is started. The output shaft of the servo motor 19 drives the Shangyin lead screw 22 to rotate. The rotation of the Shangyin lead screw 22 causes the lead screw nut support 14, which is threaded to it, to slide left and right. When the lead screw nut support 14 slides, it pulls the traction swing arm 16 to rotate and swing through the drive linkage 17, which is rotatably connected to it. By controlling the forward and reverse rotation of the output shaft of the servo motor 19, the left and right reciprocating sliding of the lead screw nut support 14 is achieved. (The lead screw nut installed inside the lead screw nut support 14 is threaded to the Shangyin lead screw 22, and the lead screw nut...) The rectangular planes at both ends fit into the surface of the photoelectric bracket 13, thus preventing the lead screw nut support 14 from being driven to rotate together by the lead screw 22. When the lead screw nut support 14 slides back and forth, it will pull the traction swing arm 16 to rotate back and forth through the drive link 17. During the swing of the traction swing arm 16, it will transmit the back and forth sliding of the lead screw nut support 14 to the lower trolley 12 through the drive link 17, thereby realizing the left and right swing of the lower trolley 12. By swinging the lower trolley 12 left and right, the packaging bag is pulled to the next station according to the specified stroke. The whole device can be connected to the host control screen. The host control screen will control the forward and reverse rotation, speed and other parameters of the output shaft of the servo motor 19 through the connection of PLC (controllable logic editor), thereby adjusting the overall traction stroke and traction timing parameters of the lower trolley 12.

[0032] In the second step, after the limiting support 28 is fixed, before the traction operation, the adjusting screw 26 and the adjusting lock block 27 are threadedly connected. The position of the adjusting screw 26 in the adjusting lock block 27 can be adjusted by turning it, thereby adjusting the position of the adjusting rod 24 in the rectangular through slot 23. When the adjusting rod 24 rotates with the traction swing arm 16, it will push the slider connected to the end surface of the traction swing arm 16 away from the sliding arm 16 to slide on the surface of the limiting support 28. The surface of the limiting support 28 is equipped with a slide rail. By adjusting the position of the adjusting rod 24 in the rectangular through slot 23, the rotation swing angle of the traction swing arm 16 can be finely adjusted, thereby realizing the fine adjustment of the single traction stroke path of the lower trolley 12.

[0033] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A servo traction device comprising a traction housing (11) inside which a lower trolley (12) is provided, characterised in that, The outer surface of the traction cover (11) is provided with a photoelectric support (13), the inside of the photoelectric support (13) is slidably connected with a screw nut support (14), the lower end of the photoelectric support (13) is provided with a swing arm support (15), the inside of the swing arm support (15) is rotatably connected with a traction swing arm (16), the inside of the traction swing arm (16) is rotatably connected with a drive connecting rod (17); Wherein, the drive connecting rod (17) is rotatably connected inside the lower trolley (12) and the screw nut support (14), the inside of the photoelectric support (13) is fixedly connected with a motor support (18), the outer surface of the motor support (18) is provided with a servo motor (19).

2. A servo-tensioning device as claimed in claim 1, characterized in that The outer surface of the photoelectric support (13) is fixedly connected with two bearing supports (21); Wherein, the inside of the two bearing supports (21) is rotatably connected with an upper silver wire rod (22).

3. A servo-tensioning device as claimed in claim 2, characterized in that The upper silver wire rod (22) is arranged on the outer surface of the servo motor (19), and the screw nut support (14) is threadedly connected on the outer surface of the upper silver wire rod (22); Wherein, the inside of the traction swing arm (16) is provided with a rectangular through slot (23).

4. A servo-tensioning device as claimed in claim 3, characterized in that The inside of the rectangular through slot (23) is provided with an adjusting pull rod (24); Wherein, the outer surface of the adjusting pull rod (24) is rotatably connected with a traction connecting rod (25).

5. A servo-tensioning device as claimed in claim 4, characterized in that The lower end of the adjusting pull rod (24) is fixedly connected with an adjusting screw rod (26); Wherein, the adjusting screw rod (26) is arranged in the inside of the traction swing arm (16).

6. A servo-tensioning device as claimed in claim 5, characterized in that The outer surface of the traction swing arm (16) is provided with an adjusting lock block (27), and the adjusting screw rod (26) is threadedly connected in the inside of the adjusting lock block (27); Wherein, the outer surface of the adjusting lock block (27) is provided with a limiting support (28).

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