Packaging film winding device

Abstract

The utility model discloses a packaging film winding device which comprises a mandrel, a driving assembly is assembled at one end of the mandrel, a pushing and pressing assembly is assembled at the other end of the mandrel, a connecting rod assembly is assembled in the middle of the mandrel, the pushing and pressing assembly comprises a thrust sliding sleeve fixed to the end of the mandrel and a push rod installed on the thrust sliding sleeve in a sliding mode and pushing along the mandrel, and the connecting rod assembly is assembled on the mandrel. The end, away from the push rod, of the spring is fixed to the mandrel, and the spring and the push rod jointly clamp the connecting rod assembly. One end of the connecting rod assembly is tightly jacked through the driving assembly, the other end of the connecting rod assembly is clamped through the pushing and pressing assembly, the connecting rod assembly comprises two impellers and a supporting rod, the two impellers are arranged at the two ends of the mandrel respectively, one impeller is clamped through a push rod and a spring, the other impeller is tightly jacked through the driving assembly, and one end of the supporting rod is connected to blades of one impeller through a connecting rod; and the other end of the supporting rod is directly or indirectly connected to the blade of the other impeller. The packaging film roll taking-out device is simple in structure, and a wound packaging film roll can be taken out rapidly, safely and efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of packaging film winding, and in particular to a packaging film winding device. Background Art

[0002] In the field of packaging machines, packaging film is needed. Usually, in order to ensure the aesthetics of the packaging, a part of the packaging film will be cut off. In order to facilitate production, it is generally necessary to collect the cut packaging film for unified processing. Since the packaging machine is running continuously, at the beginning, the diameter of the reel of the wrapped packaging film is small. Under the same angular velocity, the speed of the packaging film will be relatively slow. As more and more packaging film is wrapped, the reel diameter becomes larger and larger. Similarly, the winding speed will become faster and faster. After reaching a certain diameter, the speed of the packaging film winding will exceed the speed of unwinding. In this way, the packaging film will be pulled tighter and tighter, and the winding force will become greater and greater. In the end, the wrapped packaging film is difficult to pull out from the reel core.

[0003] Reducing the winding diameter will result in frequent handling of the wound packaging film, which greatly reduces production efficiency. However, although the use of low-friction materials and making it into a cone can reduce the pulling force on the packaging film to a certain extent, it still requires a large force to pull it out from the film roll.

[0004] Servo tracking technology is used to adjust the winding speed in real time, but it is complicated to implement. The tightness of the packaging film rolls is different, and the motor speed is also different, making it difficult to track in real time and the cost is high.

[0005] Therefore, a structure that is easy to operate and convenient for taking out the film roll is required. Utility Model Content

[0006] In view of this, the main purpose of the present application is to provide a packaging film winding device to achieve the purpose of quickly, safely and efficiently taking out the wound packaging film roll, and the device has a simple structure.

[0007] The present application provides a packaging film winding device, which comprises:

[0008] A mandrel, one end of which is equipped with a driving assembly, the other end of the mandrel is equipped with a pushing assembly, and the middle part of the mandrel is equipped with a connecting rod assembly, wherein the pushing assembly includes:

[0009] A thrust sleeve fixed to the end of the mandrel,

[0010] A push rod is slidably mounted on the thrust sleeve and is pushed along the core shaft.

[0011] A spring, one end of which is away from the push rod and is fixed on the mandrel, and the spring and the push rod clamp the connecting rod assembly together;

[0012] One end of the connecting rod assembly is tightened by the driving assembly, and the other end of the connecting rod assembly is clamped by the pushing assembly, wherein the connecting rod assembly includes:

[0013] Two impellers are respectively arranged at both ends of the core shaft, one impeller is clamped by the push rod and the spring, and the other impeller is pressed by the driving assembly.

[0014] A support rod, one end of which is connected to a blade of one impeller through a connecting rod, and the other end of which is directly or indirectly connected to a blade of another impeller.

[0015] From the above, the core shaft is driven to rotate by the driving assembly, an impeller and a connecting rod connected thereto, a support rod connected to the connecting rod, the support rod is directly or indirectly fixed to another impeller, the support rod can rotate around the core shaft, so as to be wound on the support rod into a packaging film roll; the connecting rod and the support rod are movably connected together, and the two can rotate around the connection point, a push rod is installed at one end of the core shaft, and the push rod is slidably installed on the thrust sleeve, and the thrust sleeve is made of low-friction material. When the wound packaging film roll needs to be removed, due to the huge winding force on the support rod, a large force is required to remove it in this state, but the device only needs to push the push rod lightly along the middle direction of the core shaft, and the balance state of the connecting rod, the support rod and the impeller will be broken. Under the action of the huge winding force of the film roll, the connecting rod is compressed inward, which is equivalent to this end of the support rod approaching the core shaft, and the packaging film roll can be easily removed at this time; after removing the packaging film roll, under the action of the spring, the connecting rod, the support rod and the impeller return to the original balance state. The device is simple and efficient, and can easily remove the packaging film roll.

[0016] Optionally, the other end of the support rod is directly or indirectly connected to the blades of another impeller, including: the other end of the support rod is directly connected to the blades of another impeller, or the other end of the support rod is connected to the blades of another impeller through a connecting rod.

[0017] As shown above, when both ends of the support rod are connected to the two impellers through a connecting rod, the support rod can be simultaneously moved closer to the center line of the core shaft through the push rod to facilitate the removal of the packaging film roll; when one end of the support rod is connected to an impeller through a connecting rod, and the other end of the support rod is directly connected to the blades of the other impeller, by gently pushing the push rod, the support rod with one end of the connecting rod is made to move closer to the center line of the core shaft, and the support rod is tilted as a whole, and the support rod, connecting rod and impeller form a cone, so that the packaging film roll can be taken out from the reduced diameter side surrounded by the support rods of the device.

[0018] Optionally, the driving assembly includes: a motor; and a transmission member connecting one end of the core shaft to a motor shaft of the motor.

[0019] As described above, the motor provides driving force for the packaging film winding device, and transmits the driving force to the core shaft through the transmission member to facilitate the winding of the packaging film.

[0020] Optionally, when there is no external force and the impeller is clamped by the push rod and the spring, the connecting rod is arranged perpendicular to the core shaft.

[0021] From the above, one of the impellers is installed between the push rod and the spring. When there is no external force, the spring is in a compressed state, pressing the impeller against one side of the push rod. Each connecting rod is perpendicular to the center line of the core shaft, and each support rod is parallel to the center line of the core shaft. The connecting rod, the impeller and the support rod are in a locked state. At this time, the support rod can withstand the huge winding force of the film roll, and no matter how much winding force is applied to the support rod, the connecting rod, the impeller and the support rod are still in a stable state and will not change.

[0022] Optionally, the transmission member includes a gear transmission member or a coupling.

[0023] As shown above, the gear transmission parts include gears and belts, which connect the motor shaft and the core shaft through gears and belts; the coupling can also be used as a transmission part, which has the functions of buffering and vibration absorption, can reduce the vibration of the device, protect the device from or reduce damage, and has high transmission efficiency.

[0024] Optionally, the packaging film winding device further comprises: a casing, inside of which the motor of the driving assembly is mounted, and outside of the casing the transmission member of the driving assembly is mounted.

[0025] From the above, the transmission part is located outside the casing, and the impeller at the end of the core shaft connected to the transmission part has two setting forms, namely, directly installing the support rod or indirectly installing the support rod through a connecting rod; the setting of the casing can protect both the motor and the staff.

[0026] Optionally, a rolling rod is provided on the same side of the housing where the transmission member is mounted, so as to support the packaging film when the packaging film is wound.

[0027] From above, the rolling rod is installed beside the core shaft. When the support rod on the core shaft rolls up the packaging film, the packaging film is supported by the rolling rod to keep the shape of the packaging film from being deformed when rolling up.

[0028] Optionally, the number of the connecting rods is equal to the number of the supporting rods and equal to the number of blades of the impeller.

[0029] As shown above, the number of blades of the two impellers is equal. The two impellers are arranged at both ends of the core shaft. The blades of the impellers make the support rod circle around the core shaft, which is convenient for rolling up the packaging film; the number of connecting rods connected to one impeller is equal to the number of blades of the impeller, and is equal to the number of support rods. The structural design is simple and convenient.

[0030] Optionally, a frame is provided on the same side of the housing where the transmission member is assembled, and sliding rods are provided on the top and bottom of the frame.

[0031] From the top, the frame and the sliding rod are located beside the core shaft. When the support rod on the core shaft rolls up the packaging film, the packaging film is supported by the rolling rod to keep the shape of the packaging film from being deformed when rolling up.

[0032] To summarize, the packaging film winding device provided in the present application mainly includes a core shaft, two impellers, a connecting rod, a support rod, a push rod, a thrust sleeve, a spring, a motor and other parts; the core shaft is driven by a motor, and two impellers are respectively arranged at both ends of the core shaft, an impeller is arranged at the end of the core shaft away from the motor, a connecting rod connected to the impeller, and a support rod connected to the connecting rod, the two sides of the impeller are clamped by a push rod, a thrust sleeve and a spring, an impeller and a support rod are arranged at the end of the core shaft connected to the motor, or an impeller, a connecting rod and a support rod, and the packaging film roll is taken out from the end of the core shaft away from the motor. In the state without external force, the spring is in a compressed state, and the impeller is pressed against one side of the push rod. Each connecting rod is perpendicular to the center line of the mandrel, and each support rod is parallel to the center line of the mandrel. The connecting rod, the impeller and the support rod are in a locked state. At this time, the support rod can withstand the huge winding force of the film roll, and no matter how much winding force is applied to the support rod, the connecting rod, the impeller and the support rod are still in a stable state and will not change; when it is necessary to remove the wound packaging film roll, due to the huge winding force on the support rod, a lot of force is required to remove it in this state, but the device only needs to push the push rod lightly along the middle direction of the mandrel, and the balance state of the connecting rod, the support rod and the impeller will be broken. Under the action of the huge winding force of the film roll, the connecting rod is compressed inward, which is equivalent to this end of the support rod approaching the mandrel, and the packaging film roll can be easily removed at this time; after removing the packaging film roll, under the action of the spring, the connecting rod, the support rod and the impeller return to the original balance state. The device is simple and efficient, and can easily remove the packaging film roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The various technical features of the present application and the relationship between them are further explained below with reference to the accompanying drawings. The accompanying drawings are exemplary, and some technical features are not shown in actual proportion. In addition, some drawings may omit technical features that are commonly used in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features that are not essential for understanding and implementing the present application may be shown. In other words, the combination of the various technical features shown in the accompanying drawings is not used to limit the present application. In addition, throughout the present application, the same figure numbers refer to the same content. The specific description of the drawings is as follows:

[0034] Figure 1 is a schematic diagram of a specific embodiment of a packaging film winding device in the present application;

[0035] Figure 2 It is a schematic diagram of another specific embodiment of a packaging film winding device in the present application.

[0036] Description of Reference Numerals

[0037] 1-core shaft, 2-push rod, 3-thrust sleeve, 4-spring, 5-first impeller, 6-connecting rod, 7-support rod, 8-second impeller, 9-transmission member, 10-casing, 11-rolling rod, 12-frame, 13-sliding rod.

[0038] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0041] In addition, it is hereby explained that the up, down, front, and back directions of the present application are calibrated based on the state of the packaging film winding device when it is working normally.

[0042] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The specific embodiments described below can be combined with each other to form new embodiments. The same or similar ideas or processes described in one embodiment may not be repeated in other embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0043] The present application provides a packaging film winding device, which comprises:

[0044] A mandrel, one end of which is equipped with a driving assembly, the other end of the mandrel is equipped with a pushing assembly, and the middle part of the mandrel is equipped with a connecting rod assembly, wherein the pushing assembly includes:

[0045] A thrust sleeve fixed to the end of the mandrel,

[0046] A push rod is slidably mounted on the thrust sleeve and is pushed along the core shaft.

[0047] A spring, one end of which is away from the push rod and is fixed on the mandrel, and the spring and the push rod clamp the connecting rod assembly together;

[0048] One end of the connecting rod assembly is tightened by the driving assembly, and the other end of the connecting rod assembly is clamped by the pushing assembly, wherein the connecting rod assembly includes:

[0049] Two impellers are respectively arranged at both ends of the core shaft, one impeller is clamped by the push rod and the spring, and the other impeller is pressed by the driving assembly.

[0050] A support rod, one end of which is connected to a blade of one impeller through a connecting rod, and the other end of which is directly or indirectly connected to a blade of another impeller.

[0051] Specifically, the core shaft is driven to rotate by a driving assembly, an impeller and a connecting rod connected thereto, a support rod connected to the connecting rod, the support rod is directly or indirectly fixed to another impeller, the support rod can rotate around the core shaft, so as to be wound on the support rod to form a packaging film roll; the connecting rod and the support rod are movably connected together, and the two can rotate around the connection point, a push rod is installed at one end of the core shaft, and the push rod is slidably installed on the thrust sleeve, and the thrust sleeve is made of low-friction material. When the wound packaging film roll needs to be removed, due to the huge winding force on the support rod, a large force is required to remove it in this state, but the device only needs to push the push rod lightly along the middle direction of the core shaft, and the balance state of the connecting rod, the support rod and the impeller will be broken. Under the action of the huge winding force of the film roll, the connecting rod is compressed inward, which is equivalent to the end of the support rod approaching the core shaft, and the packaging film roll can be easily removed at this time; after the packaging film roll is removed, under the action of the spring, the connecting rod, the support rod and the impeller return to the original balance state. The device is simple and efficient, and can easily remove the packaging film roll.

[0052] Optionally, the other end of the support rod is directly or indirectly connected to the blades of another impeller, including: the other end of the support rod is directly connected to the blades of another impeller, or the other end of the support rod is connected to the blades of another impeller through a connecting rod.

[0053] Specifically, when both ends of the support rod are connected to the two impellers through a connecting rod, the support rod can be simultaneously moved closer to the center line of the core shaft through the push rod to facilitate the removal of the packaging film roll; when one end of the support rod is connected to an impeller through a connecting rod, and the other end of the support rod is directly connected to the blades of the other impeller, the support rod with one end of the connecting rod is made closer to the center line of the core shaft by gently pushing the push rod, and the support rod is tilted as a whole, and the support rod, connecting rod and impeller form a cone, so that the packaging film roll can be taken out from the reduced diameter side surrounded by the support rods of the device.

[0054] Optionally, the driving assembly includes: a motor; and a transmission member connecting one end of the core shaft to a motor shaft of the motor.

[0055] Specifically, the motor provides driving force for the packaging film winding device, and transmits the driving force to the core shaft through the transmission member to facilitate the winding of the packaging film.

[0056] Optionally, the transmission member includes a gear transmission member or a coupling.

[0057] Specifically, the gear transmission parts include gears and belts, which connect the motor shaft and the core shaft through the gears and belts; the coupling can also be used as a transmission part, which has the functions of buffering and vibration absorption, can reduce the vibration of the device, protect the device from or reduce damage, and has high transmission efficiency.

[0058] Optionally, when there is no external force and the impeller is clamped by the push rod and the spring, the connecting rod is arranged perpendicular to the core shaft.

[0059] Specifically, one of the impellers is installed between the push rod and the spring. When there is no external force, the spring is in a compressed state, pressing the impeller against one side of the push rod. Each connecting rod is perpendicular to the center line of the core shaft, and each support rod is parallel to the center line of the core shaft. The connecting rod, the impeller and the support rod are in a locked state. At this time, the support rod can withstand the huge winding force of the film roll, and no matter how large the winding force is applied to the support rod, the connecting rod, the impeller and the support rod are still in a stable state and will not change.

[0060] Optionally, the packaging film winding device further comprises: a casing, inside of which the motor of the driving assembly is mounted, and outside of the casing the transmission member of the driving assembly is mounted.

[0061] Specifically, the transmission part is located outside the casing, and the impeller at the core shaft end connected to the transmission part has two setting forms, namely, directly installing the support rod or indirectly installing the support rod through a connecting rod; the setting of the casing can protect both the motor and the staff.

[0062] Optionally, a rolling rod is provided on the same side of the housing where the transmission member is mounted, so as to support the packaging film when the packaging film is wound.

[0063] Specifically, the rolling rod is installed beside the core shaft. When the supporting rod on the core shaft rolls up the packaging film, the packaging film is supported by the rolling rod to keep the shape of the packaging film from being deformed when rolling up.

[0064] Optionally, a frame is provided on the same side of the housing where the transmission member is assembled, and sliding rods are provided on the top and bottom of the frame.

[0065] Specifically, the frame and the sliding rod are located beside the core shaft. When the supporting rod on the core shaft rolls up the packaging film, the packaging film is supported by the rolling rod to keep the shape of the packaging film from being deformed when rolling up.

[0066] Optionally, the number of the connecting rods is equal to the number of the supporting rods and equal to the number of blades of the impeller.

[0067] Specifically, the two impellers have the same number of blades, and the two impellers are arranged at both ends of the core shaft. The impeller blades make the support rod circle around the core shaft, which is convenient for rolling up the packaging film; the number of connecting rods connected to one impeller is equal to the number of blades of the impeller, and is equal to the number of support rods. The structural design is simple and convenient.

[0068] Figure 1 A specific embodiment of the packaging film winding device of the present application is shown, such as Figure 1 As shown, a thrust sleeve 3 is provided at one end of the core shaft 1, and the thrust sleeve 3 is made of low-friction material. The push rod 2 is slidably installed on the thrust sleeve 3, and one end of the push rod 2 is close to the side of the first impeller 5, and the push rod 2 can be pushed along the middle position of the core shaft 1. There is a certain friction between the thrust sleeve 3 and the push rod 2. In the absence of external force, the first impeller 5 is clamped together with the spring 4. The end of the spring 4 away from the first impeller 5 is fixed on the core shaft 1, and the end of the spring 4 close to the first impeller 5 is retractable. In the absence of external force, the first impeller 5 is pressed by the compressed spring 4 and close to the push rod 2. Five blades are provided on the first impeller 5, each blade is connected to one end of the support rod 7 through a connecting rod 6, and the five support rods 7 surround the center line of the core shaft 1 for one week and can rotate with the core shaft 1; the other end of the core shaft 1 is equipped with a second impeller 8, and the second impeller 8 is provided with five blades. A groove is provided in the middle of each blade, which can be directly connected to one end of the support rod 7. When the push rod 2 is gently pushed at the middle position along the core shaft 1, the diameter of the film roll core composed of the support rods 7 will change. The diameter of the film roll core composed of the support rods 7 on the side of the first impeller 5 changes from the original A1 to A2, and the diameter of the film roll core composed of the support rods 7 on the side of the second impeller 8 remains unchanged at A1. At this time, A2 is smaller than A1, so the packaging film roll can be smoothly removed from the side of the first impeller 5.

[0069] In the above embodiment, a variation of the packaging film winding device is designed as follows: the second impeller 8 is designed to be the same shape as the first impeller 5, and is connected to the support rod 7 through a connecting rod 6; when the push rod 2 is gently pushed at the middle position along the core shaft 1, the connecting rod 6 located on the first impeller 5 and the second impeller 8 moves at the same time, and at this time, the diameter of the film roll core formed by the two ends of the support rod 7 is reduced at the same time, and the diameters at both ends are changed from the original A1 to A2 (at this time A2 is smaller than A1), and the winding force is unloaded more thoroughly at this time. This structure can be used for large-scale winding devices, and the winding diameter of the film roll will also be larger.

[0070] Figure 2 The structure of a specific embodiment of the packaging film winding device of the present application is shown. Figure 2 As shown, the motor is wrapped inside the casing 100, which protects both the motor and the staff. On the same side of the outer side of the casing 100, a core shaft 1 assembled with parts such as a support rod 7 passes through the casing 100 through a transmission member 9 and is connected to the internal motor shaft. The second impeller 8 is tightened by the transmission member 9. The transmission member 9 can use couplings of different types, or a combination of gears and belts for transmission; next to the transmission member 9, a rolling rod 11 is also provided on the casing 10, and the height of the rolling rod 11 is almost flush with the height of the top of the support rod 7 at the highest point on the core shaft 1, and the rolling rod 11 supports the packaging film; next to the rolling rod 11, a frame 12 is also provided on the casing 10, and sliding rods 13 are provided on the top and bottom of the frame 12. The sliding rod 13 protects the packaging film from being scratched by the frame, and the frame 12 defines the transmission path of the packaging film. The packaging film passes through the frame 12, goes around the top of the rolling rod 11 (or below it), and is wound around the support rod 7. The support rod 7 rotates around the core shaft 1 to wind the packaging film into a packaging film roll.

[0071] To summarize, the packaging film winding device provided in the present application mainly includes a core shaft, two impellers, a connecting rod, a support rod, a push rod, a thrust sleeve, a spring, a motor and other parts; the core shaft is driven by a motor, and two impellers are respectively arranged at both ends of the core shaft, an impeller is arranged at the end of the core shaft away from the motor, a connecting rod connected to the impeller, and a support rod connected to the connecting rod, the two sides of the impeller are clamped by a push rod, a thrust sleeve and a spring, an impeller and a support rod are arranged at the end of the core shaft connected to the motor, or an impeller, a connecting rod and a support rod, and the packaging film roll is taken out from the end of the core shaft away from the motor. In the state without external force, the spring is in a compressed state, and the impeller is pressed against one side of the push rod. Each connecting rod is perpendicular to the center line of the mandrel, and each support rod is parallel to the center line of the mandrel. The connecting rod, the impeller and the support rod are in a locked state. At this time, the support rod can withstand the huge winding force of the film roll, and no matter how much winding force is applied to the support rod, the connecting rod, the impeller and the support rod are still in a stable state and will not change; when it is necessary to remove the wound packaging film roll, due to the huge winding force on the support rod, a lot of force is required to remove it in this state, but the device only needs to push the push rod lightly along the middle direction of the mandrel, and the balance state of the connecting rod, the support rod and the impeller will be broken. Under the action of the huge winding force of the film roll, the connecting rod is compressed inward, which is equivalent to this end of the support rod approaching the mandrel, and the packaging film roll can be easily removed at this time; after removing the packaging film roll, under the action of the spring, the connecting rod, the support rod and the impeller return to the original balance state. The device is simple and efficient, and can easily remove the packaging film roll.

[0072] Unless otherwise defined, all technical and scientific terms used in this application are the same as those generally understood by those skilled in the art to which this application belongs. If there is any inconsistency, the meaning described in the full text of this application or the meaning derived from the content recorded in the full text of this application shall prevail. In addition, the terms used in this description are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0073] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the technical concept of the present application, all of which belong to the protection scope of the present application.

[0074] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A packaging film winding device, characterized in that: include: A mandrel, one end of which is equipped with a driving assembly, the other end of the mandrel is equipped with a pushing assembly, and the middle part of the mandrel is equipped with a connecting rod assembly, wherein the pushing assembly includes: A thrust sleeve fixed to the end of the mandrel, A push rod is slidably mounted on the thrust sleeve and is pushed along the core shaft. A spring, one end of which is away from the push rod and is fixed on the mandrel, and the spring and the push rod clamp the connecting rod assembly together; One end of the connecting rod assembly is tightened by the driving assembly, and the other end of the connecting rod assembly is clamped by the pushing assembly, wherein the connecting rod assembly includes: Two impellers are respectively arranged at both ends of the core shaft, one impeller is clamped by the push rod and the spring, and the other impeller is pressed by the driving assembly. A support rod, one end of which is connected to a blade of one impeller through a connecting rod, and the other end of which is directly or indirectly connected to a blade of another impeller.

2. The packaging film winding device according to claim 1, characterized in that: The other end of the support rod is directly or indirectly connected to the blade of another impeller, comprising: The other end of the support rod is directly connected to the blade of another impeller, or The other end of the support rod is connected to the blade of another impeller through a connecting rod.

3. The packaging film winding device according to claim 1, characterized in that: The drive assembly comprises: Motor; A transmission member connects one end of the core shaft to the motor shaft of the motor.

4. The packaging film winding device according to claim 1, characterized in that: When there is no external force, when the impeller is clamped by the push rod and the spring, the connecting rod is arranged perpendicular to the core shaft.

5. The packaging film winding device according to claim 3, characterized in that: The transmission member includes a gear transmission member or a coupling.

6. The packaging film winding device according to claim 3, characterized in that: Also includes: A casing, wherein the motor of the driving assembly is assembled inside, and the transmission member of the driving assembly is assembled outside the casing.

7. The packaging film winding device according to claim 6, characterized in that: On the same side of the housing where the transmission member is mounted, a rolling rod is provided to support the packaging film when the packaging film is wound.

8. The packaging film winding device according to claim 1, characterized in that: The number of the connecting rods is equal to the number of the supporting rods and equal to the number of the blades of the impeller.

9. The packaging film winding device according to claim 6, characterized in that: A frame is arranged on the same side of the housing where the transmission member is assembled, and sliding rods are arranged on the top and bottom of the frame.

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