Integrated lifting stretching traction device for film blowing machine

Abstract

The utility model relates to an integrated lifting stretching traction device for a film blowing machine, which comprises a rack and a stretching traction mechanism arranged on the rack, and the stretching traction mechanism comprises a traction frame, a traction assembly arranged on the traction frame and a herringbone clamp assembly arranged below the traction assembly. A containing space for containing the stretching traction mechanism is arranged at the position, corresponding to the traction frame, of the machine frame, lifting screws rotationally arranged on the traction frame are arranged at the two ends of the traction frame respectively, fixed lifting bases are correspondingly arranged at the positions, corresponding to the lifting screws, of the machine frame, and a synchronous driving assembly for driving the lifting screws on the two sides to rotate synchronously is arranged at the position of the machine frame or the traction frame. The fixed lifting seat is in threaded connection with the lifting screw, and the traction frame is driven by the synchronous driving assembly to axially enter or be separated from the containing space, so that the traction frame can completely or partially enter or exit from the containing space in the transportation process, and the stretching traction mechanism does not need to be disassembled to reduce the height; after arriving at a destination, the device can directly work after being directly lifted, so that the installation and transportation cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of blown film machines, and in particular to an integrated lifting, stretching and traction device for blown film machines. Background Technology

[0002] A blown film machine is a device that heats and melts plastic particles, then blows them into plastic films and rolls them up. The plastic films produced are widely used in various fields such as food and medicine, depending on their materials and properties. They are suitable for various high-end film packaging, plastic bag films, protective films, etc.

[0003] Chinese utility model patent CN202439215U discloses a blown film machine with a reasonable structure, computer control, high degree of automation, simple operation, and low energy consumption. The blown film machine consists of a frame, extruder, traction auxiliary machine, air compressor, electrical control box, blower, and winding mechanism. A staircase is connected to the frame, and guide wheels and a corona treatment machine are installed on one side of the frame. The frame is equipped with a foam stabilizing device, a herringbone clamp, traction auxiliary machine, and traction motor. The extruder is connected to a heating device via a hopper, and a die head is connected to the heating device. The die head is equipped with an air ring, which is connected to a blower through an air duct. A rotary traction machine is connected to the lower end of the air ring, and a traction reducer is connected to the traction motor. An extrusion reducer is connected to the extruder. When this blown film machine is working, the traction auxiliary machine (traction mechanism) needs to be installed above the air ring, and in order to ensure the stability of film delivery, it needs to be installed at a high position on the frame. This means that the traction auxiliary machine (traction mechanism) needs to be disassembled and transported before being reassembled during transportation, causing inconvenience in transportation and troublesome loading and unloading, thereby increasing transportation and labor costs. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an integrated lifting, stretching and traction device for a blown film machine, which addresses the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated lifting and stretching traction device for a blown film machine, comprising a frame and a stretching traction mechanism mounted on the frame. The stretching traction mechanism includes a traction frame, a traction component mounted on the traction frame, and a herringbone clamp component mounted below the traction component. The frame has an accommodating space for accommodating the stretching traction mechanism at the location corresponding to the traction frame. Each end of the traction frame has a rotatable lifting screw mounted on the traction frame. A fixed lifting seat is correspondingly provided on the frame at the location corresponding to the lifting screw. A synchronous drive component is provided on the frame or traction frame to drive the lifting screws on both sides to rotate synchronously. The fixed lifting seat is threadedly connected to the lifting screw and drives the traction frame to axially enter or leave the accommodating space through the synchronous drive component.

[0006] Using the above technical solution, the stretching and traction mechanism is installed on the frame, and the traction component and herringbone clamp component are installed on the traction frame. The frame, as the supporting structure of the entire device, is fixed to the ground and is used to install and support the stretching and traction mechanism. The stretching and traction mechanism, installed on the frame, is responsible for the stretching and traction of the film. Each end of the traction frame is equipped with a lifting screw, which is connected to a fixed lifting seat on the frame via threads. The synchronous drive component is installed on the frame or traction frame and is responsible for driving the lifting screws on both sides to rotate synchronously, ensuring that the traction frame can move axially smoothly within the accommodating space. This ensures that the traction frame can completely or partially enter or exit the accommodating space during transportation without disassembling the stretching and traction mechanism to reduce height. After arriving at the destination, it can be directly raised and put into operation, reducing installation and transportation costs. It also allows the traction component and herringbone clamp component to adapt to the film stretching requirements of different heights, improving the flexibility and adaptability of the blown film machine. The entire stretching and traction mechanism is integrated on a single frame, reducing the complexity of installation and debugging. The synchronous drive component ensures the synchronous rotation of the lifting screws on both sides, avoiding equipment damage or operational malfunctions caused by inconsistent lifting.

[0007] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the synchronous drive assembly includes a lifting motor mounted on the traction frame, a lifting gear mounted on the lifting screw, a bidirectional transmission gearbox mounted on the output end of the lifting motor, and a first synchronous shaft and a second synchronous shaft. One end of the first and second synchronous shafts respectively passes through the bidirectional transmission gearbox, and the other end is respectively provided with a synchronous gear meshing with the lifting gear. The lifting motor synchronously transmits power to the first and second synchronous shafts through the bidirectional transmission gearbox.

[0008] Using the above technical solution, the synchronous drive assembly includes a lifting motor that provides power to the entire synchronous drive assembly; the lifting motor is responsible for driving the entire lifting mechanism, and its speed and direction can be adjusted by the control system to adapt to different lifting speed and direction requirements. A lifting gear is set on the same end face of the lifting screws on both sides and rotates together with the lifting screws. The lifting gear meshes with the synchronous gears on the first and second synchronous shafts, transmitting the power of the lifting motor to the lifting screws to achieve rotation of the lifting screws. A bidirectional transmission gearbox is set at the output end of the lifting motor for adjusting and transmitting power. The first and second synchronous shafts are two independent shafts, which are respectively connected to the bidirectional transmission gearbox and the lifting gear. Two synchronous shafts are responsible for transmitting power synchronously from the bidirectional transmission gearbox to the lifting gears at both ends, ensuring the synchronous rotation of the lifting screws at both ends. The synchronous gears mesh with the lifting gears, transmitting the power from the bidirectional transmission gearbox to the lifting gears, thereby driving the lifting screws to rotate. The bidirectional transmission gearbox is configured to receive power from the motor and output power synchronously to both sides. Since the first and second synchronous shafts have the same power source and mesh with the lifting gears through the synchronous gears, the synchronous rotation of the lifting screws at both ends can be achieved. The first and second synchronous shafts can rotate in the same direction or in opposite directions. When rotating in opposite directions, simply reverse the threads of the lifting screws on both sides to achieve stable synchronous movement.

[0009] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the bidirectional transmission gearbox includes a housing, a drive gear disposed within the housing, and driven gears disposed at both ends of the housing and meshing with the drive gear; the first and second synchronous rotating shafts respectively pass through the housing and are fixedly connected to the driven gears; and the output end of the lifting motor passes through the housing and is fixedly connected to the drive gear.

[0010] Using the above technical solution, the lifting gear, synchronous gear, driving gear, and driven gear are all preferably bevel gears. The bidirectional transmission gearbox is equipped with a driving gear and a driven gear. The driving gear receives power from the lifting motor and transmits it to two driven gears inside the gearbox. The driven gears are located at both ends of the gearbox and mesh with the driving gear. The first and second synchronous shafts are respectively inserted into the gearbox and fixedly connected to the driven gears, transmitting the power of the driven gears to the synchronous gears at both ends of the first and second synchronous shafts. When the lifting motor starts, its output end drives the driving gear to rotate. The driving gear transmits power to the driven gear through meshing, and the driven gear then transmits power to the first and second synchronous shafts. These two shafts output power to the outside of the gearbox, driving the lifting screw to rotate in opposite directions. Since the threads of the lifting screw are arranged in opposite directions, stable synchronous motion can be achieved.

[0011] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: a positioning bushing is provided inside the housing; the first and second synchronous rotating shafts both pass through the driven gear and are inserted into the positioning bushing for rotation; an auxiliary gear is provided on the other side of the housing corresponding to the driving gear; an auxiliary mounting shaft is provided on the positioning bushing corresponding to the auxiliary gear; one end of the auxiliary mounting shaft is connected to the auxiliary bearing inside the auxiliary gear; the other end passes through the positioning bushing and is connected to the driving gear; and the output end of the lifting motor is connected to the auxiliary mounting shaft.

[0012] Using the above technical solution, the positioning bushing is installed inside the gearbox to fix and guide the rotation of the first and second synchronous shafts. It ensures that the first and second synchronous shafts maintain the correct position and alignment during rotation, reduces wear, and improves the stability of the gearbox. After the first and second synchronous shafts pass through the driven gear, they are inserted into the positioning bushing and rotate there, allowing the driven gear to transmit power to the first and second synchronous shafts. At the same time, the positioning bushing provides support and precise positioning. The auxiliary mounting shaft is the shaft that connects the auxiliary gear and the driving gear. When the driving gear rotates, the inner ring of the auxiliary bearing of the auxiliary gear will rotate, while the auxiliary gear connected to the outer ring will not be affected. The rotational power of the auxiliary gear is guided by the driven gear, thus making the auxiliary gear the transmission tooth on the other side of the driven gear, making the bidirectional transmission gearbox more stable.

[0013] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: both sides of the traction frame are provided with positioning rotating seats for mounting the first and second synchronous rotating shafts. One end of the first and second synchronous rotating shafts passes through the positioning rotating seats and meshes with the lifting gear, while the other end is respectively inserted into the bidirectional transmission gearbox. A linear guide rail is provided between the frame and the traction frame, which is parallel to the lifting screw.

[0014] Using the above technical solution, positioning rotating seats are provided on both sides of the traction frame. One end of the first and second synchronous rotating shafts passes through the positioning rotating seats and meshes with the lifting gear, while the other end is inserted into the bidirectional transmission gearbox. This provides a mounting support for the first and second synchronous rotating shafts on the traction frame, improving transmission stability. A linear guide rail is provided between the frame and the traction frame to ensure the smooth movement of the traction frame without deviation.

[0015] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the synchronous drive assembly includes a lifting motor mounted on the traction frame, a lifting sprocket mounted on the lifting screw, a drive sprocket mounted at the output end of the lifting motor, and a synchronous chain wound around the drive sprocket and the two lifting sprockets.

[0016] Using the above technical solution, another synchronous drive component is proposed. The output end of the lifting motor is equipped with a drive sprocket, which is set on the same horizontal plane as the lifting sprocket. A synchronous chain is wound between the drive sprocket and the two lifting sprockets to form a closed transmission loop. When the lifting motor starts, its output shaft drives the drive sprocket to rotate. The drive sprocket transmits power to the lifting sprockets on both sides through the synchronous chain. Due to the characteristics of the synchronous chain, the lifting sprockets on both sides rotate at the same speed and direction, thereby driving the lifting screws on both sides to lift synchronously. This type also includes methods such as using synchronous pulleys and synchronous belts, and pulley belts, which are considered equivalent technical solutions. This synchronous drive component design realizes the synchronous lifting of the lifting screws through chain transmission, improving the operating efficiency and stability of the lifting process of the integrated lifting and stretching traction device for blown film machines.

[0017] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the traction assembly includes an active traction roller and a driven traction roller, a traction gap for film material to pass through is provided between the active traction roller and the driven traction roller, the traction gap is correspondingly provided with the end of the herringbone clamp assembly below, a traction motor for driving the active traction roller to rotate is provided at one end of the traction frame corresponding to the active traction roller, driven traction bearing seats are provided at both ends of the driven traction roller, and a gap adjusting cylinder for driving the driven traction roller to approach or move away from the active traction roller to control the width of the traction gap is provided at one end of the traction frame away from the active traction roller.

[0018] In the above technical solution, the active traction roller is driven by a traction motor, while the driven traction roller is usually unpowered and rotates along with the active traction roller. A traction gap is provided between the active and driven traction rollers to allow the film material to pass through. The traction gap is correspondingly set at the end of the herringbone clamp assembly below to ensure that the film can be correctly guided and clamped when passing through the traction gap. The traction motor is responsible for driving the active traction roller to rotate, thereby driving the stretching and movement of the film material. Driven traction bearing seats are provided at both ends of the driven traction roller. These bearing seats support the driven traction roller and reduce friction during its rotation. The gap adjusting cylinder is used to drive the driven traction roller closer to or further away from the active traction roller, thereby controlling the width of the traction gap so that it can adapt to film materials of different widths and maintain tension control during the film stretching process.

[0019] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the herringbone clamp assembly includes two adjusting plates that gradually approach each other along the direction from the frame to the traction assembly. The end of the adjusting plate facing the traction assembly is provided with an upper adjusting assembly for controlling the width of the output port between the adjusting plates, and the end facing the frame is provided with a lower adjusting assembly for controlling the width of the input port between the adjusting plates.

[0020] Using the above technical solution, the herringbone clamp assembly consists of two adjusting plates. These two adjusting plates gradually approach each other along the direction from the frame to the traction assembly, forming a herringbone-shaped structure. The main function of the adjusting plates is to clamp the film. By adjusting the position of the adjusting plates, the width of the film is controlled, ensuring that the film maintains appropriate tension and shape during traction. The upper adjusting assembly is responsible for controlling the width of the output port between the adjusting plates, i.e., adjusting the width of the film after passing through the herringbone clamp assembly. By adjusting the upper adjusting assembly, the distance between the adjusting plates can be changed, thereby adjusting the width of the film. The lower adjusting assembly is responsible for controlling the width of the input port between the adjusting plates, i.e., adjusting the width of the film before entering the herringbone clamp assembly. By adjusting the lower adjusting assembly, the initial clamping width of the adjusting plates can be changed, thus accommodating films of different widths.

[0021] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: the upper adjustment assembly includes an upper adjustment fixing plate connected to the traction frame, upper adjustment seats and an upper width adjustment screw disposed opposite to each other on the upper ends of the two adjustment plates, the upper width adjustment screw being threadedly connected to the two upper adjustment seats, and an upper adjustment handwheel being disposed at one end after passing through the adjustment fixing plate, so that the upper width adjustment screw can be rotatably disposed on the upper adjustment fixing plate to control the relative position of the two upper adjustment seats; the lower adjustment assembly includes a lower adjustment fixing plate connected to the traction frame, a lower width adjustment plate disposed opposite to each other at the lower ends of the two adjustment plates, a lower width adjustment screw and a lower width adjustment nut, the lower adjustment fixing plate being provided with a lower adjustment fixing seat, one end of the lower width adjustment screw passing through the lower adjustment fixing seat and being threadedly connected to the lower width adjustment nut, and the other end being provided with a lower adjustment handwheel; one end of the lower width adjustment plate is hinged to the adjustment plate respectively, and the other end intersects each other to form a V-shape and is hinged to the lower width adjustment nut, so that the lower width adjustment screw can be rotatably disposed on the lower adjustment fixing plate to control the included angle of the two lower width adjustment plates.

[0022] In the above technical solution, the upper adjusting fixing plate is connected to the traction frame to support and position the upper adjusting seat and the upper width adjusting screw. The upper width adjusting screw is threadedly connected to the two upper adjusting seats to adjust their relative positions, thereby changing the distance between the adjusting plates. One end of the upper width adjusting screw passes through the upper adjusting fixing plate and is fitted with an upper adjusting handwheel, allowing the operator to rotate the upper width adjusting screw by rotating the handwheel, thus adjusting the relative positions of the two upper adjusting seats. The lower adjusting fixing plate is connected to the traction frame and serves as the fixing part of the lower adjusting assembly, supporting and positioning the lower width adjusting plate and the lower width adjusting screw. The device consists of a rod and a lower width adjusting nut. The lower adjusting fixing seat is located on the lower adjusting fixing plate and is used to fix the position of the lower width adjusting screw. One end of the lower width adjusting screw passes through the lower adjusting fixing seat and is threadedly connected to the lower width adjusting nut. This screw is used to adjust the included angle between the two lower width adjusting plates. One end of the lower adjusting fixing plate is hinged to the adjusting plate, and the other end intersects with each other to form a V-shape and is hinged to the lower width adjusting nut. By rotating the lower adjusting handwheel, the lower width adjusting screw rotates, causing the two lower width adjusting plates to rotate around the lower width adjusting nut, changing the included angle between the adjusting plates, controlling the width below the adjusting plates, and adapting to films of different widths.

[0023] The aforementioned integrated lifting and stretching traction device for blown film machines can be further configured as follows: several positioning plates that gradually narrow along the direction from the frame to the traction component are provided between the adjustment plates; the lower adjustment fixing plate is provided with a positioning adjustment strip and a positioning adjustment seat at the corresponding positioning plate; one end of the positioning adjustment strip is fixedly connected to the positioning plate, and the other end is movably inserted laterally into the positioning adjustment seat; the adjustment plate includes a mounting frame and several strip-shaped rods evenly distributed on the mounting frame; the end of the strip-shaped rod facing the positioning plate is an arc-shaped end face.

[0024] Using the above technical solution, the positioning plate helps ensure that the film maintains the correct path and position when passing through the herringbone clamp assembly, preventing the film from shifting or deviating from the predetermined traction direction. The positioning adjustment seat inserted at the other end of the positioning adjustment bar is used to fine-tune the position of the positioning plate to ensure precise alignment of the film. The adjustment plate controls the width of the film by adjusting its relative position. The design of the strip-shaped rod helps to evenly distribute the clamping force and avoid damage to the film. The arc-shaped end face can smoothly guide the film through the adjustment plate, reducing damage to the film during high-speed traction.

[0025] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention in its contracted state.

[0027] Figure 2 This is a right view of Embodiment 1 of the present invention in its retracted state.

[0028] Figure 3 for Figure 2 A sectional view along line AA.

[0029] Figure 4 This is a schematic diagram of the bidirectional transmission gearbox of Embodiment 1 of this utility model.

[0030] Figure 5 This is a schematic diagram of the structure of the traction component and the herringbone clamp component in an embodiment of this utility model.

[0031] Figure 6 This is a plan view of the traction assembly and the herringbone clamp assembly according to an embodiment of the present utility model.

[0032] Figure 7 This is an exploded view of Embodiment 2 of this utility model in its contracted state.

[0033] Figure 8 This is a cross-sectional schematic diagram of Embodiment 2 of the present invention in its contracted state.

[0034] Figure 9 This is a three-dimensional schematic diagram of the working state of an embodiment of the present invention. Implementation

[0035] Example 1: As Figures 1-6As shown, the integrated lifting and stretching traction device for a blown film machine includes a frame 1 and a stretching traction mechanism mounted on the frame 1. The stretching traction mechanism includes a traction frame 2, a traction component 3 mounted on the traction frame 2, and a herringbone clamp component 4 mounted below the traction component 3. The frame 1 has a receiving space a corresponding to the traction frame 2 for accommodating the stretching traction mechanism. Each end of the traction frame 2 has a rotatable lifting screw 21 mounted on the traction frame 2. The frame 1 has a fixed lifting seat 11 corresponding to the lifting screw 21. The traction frame 2 has a synchronous drive component that drives the lifting screws 21 on both sides to rotate synchronously. The fixed lifting seat 11 is threadedly connected to the lifting screw 21, and the synchronous drive component drives the stretching traction mechanism to axially enter or leave the receiving space a, so that it can be transported by synchronous drive. The drive assembly lowers the overall height of the blown film machine, reducing transportation costs and eliminating the need for disassembly. Upon arrival at the destination, it can quickly raise the stretching and traction mechanism for rapid operation, avoiding the need for reinstallation after disassembly. The synchronous drive assembly includes a lifting motor 22 mounted on the traction frame 2, a lifting gear 211 mounted on the lifting screw 21, a bidirectional transmission gearbox 5 mounted on the output end of the lifting motor 22, and a first synchronous shaft 23 and a second synchronous shaft 24. One end of the first synchronous shaft 23 and the second synchronous shaft 24 are respectively inserted into the bidirectional transmission gearbox 5, and the other end is respectively provided with a synchronous gear 230 that meshes with the lifting gear 211. The lifting motor 22 transmits power synchronously to the first synchronous shaft 23 and the second synchronous shaft 24 through the bidirectional transmission gearbox 5.

[0036] like Figure 3 , Figure 4As shown, the bidirectional transmission gearbox 5 includes a housing 51 fixed on the traction frame 2, a driving gear 52 disposed inside the housing 51, and driven gears 53 disposed at both ends of the housing 51 and meshing with the driving gear 52. A first synchronous shaft 23 and a second synchronous shaft 24 are respectively inserted into the housing 51 and fixedly connected to the driven gears 53. The output end of the lifting motor 22 is inserted into the housing 51 and fixedly connected to the driving gear 52. The driving gear 52 drives the driven gears 53 on both sides to rotate in opposite directions, thereby driving the lifting screws 21 on both sides to rotate in opposite directions. By setting the lifting screws 21 to reverse threads, synchronous lifting of the tensioning traction mechanism is achieved. A positioning sleeve 54 is provided inside the housing 51. Both the first synchronous shaft 23 and the second synchronous shaft 24 pass through the driven gears 53 and are inserted into the positioning sleeve 54 for positioning and rotation. An auxiliary gear 55 is provided on the other side of the corresponding drive gear 52. An auxiliary mounting shaft 56 is provided on the positioning bushing 54 corresponding to the auxiliary gear 55. One end of the auxiliary mounting shaft 56 is connected to the inner ring of the auxiliary bearing 551 in the auxiliary gear 55, and the other end passes through the positioning bushing 54 and is connected to the drive gear 52. The output end of the lifting motor 22 is fixedly connected to the auxiliary mounting shaft 56, and drives the drive gear 52 to rotate by driving the auxiliary mounting shaft 56. Both sides of the traction frame 2 are provided with positioning rotating seats 20 for mounting the first synchronous rotating shaft 23 and the second synchronous rotating shaft 24. One end of the first synchronous rotating shaft 23 and the second synchronous rotating shaft 24 passes through the positioning rotating seat 20 and meshes with the lifting gear 211. The other end is respectively inserted into the bidirectional transmission gearbox 5. A linear guide rail 12 is provided between the frame 1 and the traction frame 2, which is parallel to the lifting screw 21.

[0037] like Figure 3 , Figure 5 , Figure 6As shown, the traction assembly 3 includes an active traction roller 31 and a driven traction roller 32. A traction gap for the film material to pass through is provided between the active traction roller 31 and the driven traction roller 32. The traction gap is correspondingly set at the end of the herringbone clamp assembly 4 below. The traction frame 2 is provided with a traction motor 33 at one end corresponding to the active traction roller 31 to drive the active traction roller 31 to rotate. Driven traction bearing seats 321 are provided at both ends of the driven traction roller 32. The traction frame 2 is provided with a gap adjusting cylinder 34 at the end away from the active traction roller 31 to drive the driven traction roller 32 to approach or move away from the active traction roller 31, thereby controlling the width of the traction gap. The output end of the gap adjusting cylinder 34 is connected to the driven traction bearing seat 321. The herringbone clamp assembly 4 includes two adjusting plates 41 that gradually approach each other along the direction from the frame 1 to the traction assembly 3. The adjusting plates 41 face towards One end of the traction assembly 3 is provided with an upper adjustment assembly 42 that controls the width of the output port between the control adjustment plates 41, and the other end facing the frame 1 is provided with a lower adjustment assembly 43 that controls the width of the input port between the control adjustment plates 41. There are two positioning plates 44 between the adjustment plates 41 that gradually narrow along the direction from the frame 1 to the traction assembly 2. The lower adjustment fixing plate 431 is provided with a positioning adjustment strip 45 and a positioning adjustment seat 46 corresponding to the positioning plate 44. One end of the positioning adjustment strip 45 is fixedly connected to the positioning plate 44, and the other end is movably inserted into the positioning adjustment seat 46 and can slide laterally along the positioning adjustment seat 46 to adjust the relative position of the positioning adjustment strip 45. The adjustment plate 41 includes a mounting frame 411 and several strip-shaped rods 412 evenly distributed on the mounting frame 411. The end of the strip-shaped rod 412 facing the positioning plate 44 is an arc-shaped end face.

[0038] like Figure 5 As shown, the upper adjustment assembly 42 includes an upper adjustment fixing plate 421 connected to the traction frame 2, upper adjustment seats 422 disposed opposite to each other on the upper ends of the two adjustment plates 41, and an upper width adjustment screw 423. The upper width adjustment screw 423 is threadedly connected to the two upper adjustment seats 422, and one end passes through the adjustment fixing plate 421 and is followed by an upper adjustment handwheel 4231, so that the upper width adjustment screw 423 can be rotatably mounted on the upper adjustment fixing plate 421 to control the relative position of the two upper adjustment seats 422. The lower adjustment assembly 43 includes a lower adjustment fixing plate 431 connected to the traction frame 2, and upper adjustment seats 422 disposed opposite to each other on the lower ends of the two adjustment plates 41. The system includes a lower width adjustment plate 432, a lower width adjustment screw 433, and a lower width adjustment nut 434. A lower adjustment fixing plate 431 is provided with a lower adjustment fixing seat 4311. One end of the lower width adjustment screw 433 passes through the lower adjustment fixing seat 4311 and is threadedly connected to the lower width adjustment nut 434. The other end is provided with a lower adjustment handwheel 4331. One end of the lower width adjustment plate 432 is hinged to the adjustment plate 41, and the other end intersects with each other to form a V-shape and is hinged to the lower width adjustment nut 434, so that the lower width adjustment screw 433 can be rotatably set on the lower adjustment fixing plate 431 to control the included angle of the two lower width adjustment plates 432.

[0039] Example 2: Figure 7 , Figure 8 As shown, the synchronous drive assembly includes a lifting motor 22 mounted on the traction frame 2, a lifting sprocket 212 mounted on the lifting screw 21, a drive sprocket 221 mounted at the output end of the lifting motor 22, and a synchronous chain 222 wound around the drive sprocket 221 and the two lifting sprockets 212. In this embodiment, the lifting motor 1 is installed inside the traction frame 2, and drives the drive sprocket 221 to make the synchronous chain 222 rotate synchronously and in the same direction with the lifting sprockets 212 on both sides, thereby controlling the tension traction mechanism to enter or leave the accommodating space a axially.

Claims

1. An integrated lifting and stretching pulling device for a film blowing machine, comprising a machine frame and a stretching pulling mechanism arranged on the machine frame, characterized in that: The stretching traction mechanism comprises a traction frame, a traction assembly arranged on the traction frame, and a herringbone clamp assembly arranged below the traction assembly, the frame is provided with a containing space for containing the stretching traction mechanism at the position corresponding to the traction frame, both ends of the traction frame are respectively provided with rotating lifting screws arranged on the traction frame, the frame is correspondingly provided with fixed lifting seats corresponding to the lifting screws, and the frame or the traction frame is provided with a synchronous driving assembly for driving the lifting screws on both sides to rotate synchronously, the fixed lifting seat is threadedly connected with the lifting screw, and the traction frame is driven by the synchronous driving assembly to axially enter or leave the containing space.

2. The integrated elevation-stretching haul-off device for a film blowing machine according to claim 1, characterized in that: The synchronous driving assembly comprises a lifting motor arranged on the traction frame, a lifting gear arranged on the lifting screw, a bidirectional transmission gear box arranged at the output end of the lifting motor, and first and second synchronous rotating shafts, one end of each of the first and second synchronous rotating shafts penetrates into the bidirectional transmission gear box, and the other end of each of the first and second synchronous rotating shafts is respectively provided with a synchronous gear meshing with the lifting gear, and the lifting motor synchronously transmits power to the first and second synchronous rotating shafts through the bidirectional transmission gear box.

3. The integrated elevation-stretching draw device for a film blowing machine according to claim 2, characterized in that: The bidirectional transmission gear box comprises a box body, a driving gear arranged in the box body, and driven gears arranged at both ends of the box body and meshing with the driving gear, the first and second synchronous rotating shafts respectively penetrate into the box body and are fixedly connected with the driven gears, and the output end of the lifting motor penetrates into the box body and is fixedly connected with the driving gear.

4. The integrated elevation-stretching draw device for a film blowing machine according to claim 3, characterized in that: The box body is provided with a positioning shaft sleeve, the first and second synchronous rotating shafts are inserted into the positioning shaft sleeve and rotate after penetrating through the driven gears, the other side of the box body corresponding to the driving gear is provided with an auxiliary gear, the positioning shaft sleeve is provided with an auxiliary mounting shaft corresponding to the auxiliary gear, one end of the auxiliary mounting shaft is connected with an auxiliary bearing in the auxiliary gear, the other end of the auxiliary mounting shaft penetrates through the positioning shaft sleeve and is connected with the driving gear, and the output end of the lifting motor is connected with the auxiliary mounting shaft.

5. The integrated elevation-stretching haul-off device for a film blowing machine according to claim 2, characterized in that: Both sides of the traction frame are provided with positioning rotating seats for mounting the first and second synchronous rotating shafts, one end of each of the first and second synchronous rotating shafts penetrates out of the positioning rotating seat and meshes with the lifting gear, and the other end of each of the first and second synchronous rotating shafts is respectively inserted into the bidirectional transmission gear box, and the frame and the traction frame are provided with straight linear guides arranged in parallel with the lifting screws.

6. The integrated elevation-stretching haul-off device for a film blowing machine according to claim 1, characterized in that: The synchronous driving assembly comprises a lifting motor arranged on the traction frame, a lifting chain wheel arranged on the lifting screw, a driving sprocket arranged at the output end of the lifting motor, and a synchronous chain wound around the driving sprocket and the two lifting chain wheels.

7. The integrated elevation-stretching draw device for a film blowing machine according to any one of claims 1-6, characterized in that: The traction assembly comprises a driving traction roller and a driven traction roller, a traction gap for passing the film is arranged between the driving traction roller and the driven traction roller, the traction gap is correspondingly arranged with the end of the herringbone clamp assembly below, one end of the traction frame corresponding to the driving traction roller is provided with a traction motor for driving the driving traction roller to rotate, both ends of the driven traction roller are provided with driven traction bearing seats, and one end of the traction frame away from the driving traction roller is provided with a gap adjusting cylinder for driving the driven traction roller to approach or move away from the driving traction roller, thereby controlling the width of the traction gap.

8. The integrated elevation-stretching draw device for a film blowing machine according to any one of claims 1-6, characterized in that: The V-shaped clamp assembly comprises two adjusting plates gradually approaching each other in the direction from the frame to the traction assembly, one end of each adjusting plate is provided with an upper adjusting assembly for controlling the width of the outlet between the two adjusting plates, and the other end of each adjusting plate is provided with a lower adjusting assembly for controlling the width of the inlet between the two adjusting plates.

9. The integrated elevation-stretching draw device for a film blowing machine according to claim 8, characterized in that: The upper adjusting assembly comprises an upper adjusting fixed plate connected with the traction frame, upper adjusting seats arranged opposite to each other at the upper ends of the two adjusting plates, and an upper width adjusting screw, one end of which is provided with an upper adjusting hand wheel after penetrating through the adjusting fixed plate, so that the upper width adjusting screw is rotatably arranged on the upper adjusting fixed plate to control the relative positions of the two upper adjusting seats.

10. The integrated elevation-stretching draw device for a film blowing machine according to claim 9, characterized in that: The lower adjusting assembly comprises a lower adjusting fixed plate connected with the traction frame, lower width adjusting plates arranged opposite to each other at the lower ends of the two adjusting plates, a lower width adjusting screw, and a lower width adjusting nut, the lower adjusting fixed plate is provided with a lower adjusting fixed seat, one end of the lower width adjusting screw is threadedly connected with the lower width adjusting nut after penetrating through the lower adjusting fixed seat, and the other end is provided with a lower adjusting hand wheel, one end of each lower width adjusting plate is hingedly connected with the adjusting plate, and the other end of each lower width adjusting plate is hingedly connected with the lower width adjusting nut to form a V-shaped structure, so that the lower width adjusting screw is rotatably arranged on the lower adjusting fixed plate to control the included angle of the two lower width adjusting plates. A plurality of positioning plates gradually narrowing in the direction from the frame to the traction assembly are arranged between the two adjusting plates, the lower adjusting fixed plate is provided with a positioning adjusting strip and a positioning adjusting seat corresponding to the positioning plates, one end of the positioning adjusting strip is fixedly connected with the positioning plate, and the other end is movably transversely inserted into the positioning adjusting seat, and the adjusting plate comprises a mounting frame and a plurality of strip-shaped rods uniformly arranged on the mounting frame, one end of each strip-shaped rod is an arc-shaped end face facing the positioning plate.

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