Film production line, film machine synchronous stretching track and chain clamp driving device

Abstract

The application relates to the technical field of film production, and particularly discloses a film production line, a film mechanical synchronous stretching track and a chain clamp driving device. The chain clamp driving device comprises a slow-speed chain disc and a chain clamp. The slow-speed chain disc is provided with a plurality of first tooth portions. Two adjacent first tooth portions are matched to form a first tooth groove. A first shaft crown is matched with the first tooth groove and used for driving the chain clamp to move, and a second shaft crown can avoid the slow-speed chain disc. When two adjacent first shaft crowns are respectively arranged in two adjacent first tooth grooves, all the second shaft crowns located between the two adjacent first shaft crowns are covered by the projection of the first tooth portion in the axial direction. The film production line, the film mechanical synchronous stretching track and the chain clamp driving device directly act on the first shaft crown to drive the chain clamp to move, without setting a tooth groove corresponding to the position of the second shaft crown on the slow-speed chain disc. In addition, the width of the first tooth portion is large, the structural strength is large, the risk of misalignment and occlusion is effectively reduced, and the failure rate is reduced.

Description

Technical Field

[0001] This application relates to the field of thin film production technology, and in particular to a thin film production line, a thin film mechanical synchronous stretching track, and a chain clamp drive device. Background Technology

[0002] With the development of polymer film heat treatment technology, film stretching tracks have emerged. Generally, two film stretching tracks are configured, arranged side-by-side with intervals, and installed within a high-temperature oven. The film stretching track includes an annular guide rail, chain clamps, and a drive chain. The chain clamps are mounted on the annular guide rail, and the drive chain is connected to and provides power to the chain clamps, enabling them to circulate and reciprocate along the annular guide rail. The annular guide rail includes a preheating section, a stretching section, a shaping section, a cooling section, and a return section arranged sequentially along the movement direction of the chain clamps. The film is pulled along the track by the chain clamps on opposite sides, and according to process requirements, the film is continuously stretched, tensioned, or relaxed in both longitudinal and transverse directions or any one direction according to the running direction of the chain clamps.

[0003] In related technologies, each film stretching track is typically equipped with 3-4 drive chain discs. Two drive chain discs are usually configured on the inlet side of the high-temperature oven, and 1-2 drive chain discs are usually configured on the outlet side. Generally, of the two drive chain discs on the inlet side of the high-temperature oven, one is a fast chain disc and the other is a slow chain disc. The drive chain disc on the outlet side of the high-temperature oven is the fast chain disc. The fast chain disc operates at a higher speed and has a larger tooth pitch; the slow chain disc operates at a lower speed and has a smaller tooth pitch. The speed of the fast chain disc is higher than the rotational speed of the slow chain disc. The chain clamp returns at high speed to the inlet side of the high-temperature oven via the return section and enters the slow chain disc at a lower speed. The slow chain disc drives the returning chain clamp to enter the high-temperature oven at a lower speed and begin the next cycle. At this time, the distance between adjacent clamps is at its minimum.

[0004] However, slow-speed sprockets are prone to tooth wear and failure due to their small tooth pitch, which can even lead to serious mechanical failures such as misalignment and meshing between the teeth and the chain clamp. This results in frequent downtime for maintenance and higher costs. Summary of the Invention

[0005] Based on this, it is necessary to address at least one problem in the prior art by providing a film production line, a film mechanical synchronous stretching track, and a chain clamp drive device that can reduce or even avoid tooth failures of the drive chain and lower the failure rate, and is suitable for high-speed operation, thereby improving production efficiency.

[0006] On one hand, this application provides a chain clamp driving device, the chain clamp driving device comprising:

[0007] A slow-speed chain disk, wherein the slow-speed chain disk has a plurality of first teeth arranged at intervals around its outer periphery, and two adjacent first teeth cooperate to form a first tooth groove.

[0008] The chain clamp has a plurality of axle crowns arranged sequentially along its length. The plurality of axle crowns include a plurality of first axle crowns and a plurality of second axle crowns. At least one second axle crown is provided between any two adjacent first axle crowns. The first axle crowns cooperate with the first tooth grooves and are used to drive the chain clamp to move. The second axle crowns can avoid the slow-speed chain disc. Two adjacent first axle crowns and all the second axle crowns located between two adjacent first axle crowns are arranged sequentially along the movement direction of the chain clamp. When two adjacent first axle crowns are respectively inserted into two adjacent first tooth grooves, all the second axle crowns located between two adjacent first axle crowns are covered by the projection of the first tooth portion along the axial direction of the slow-speed chain disc.

[0009] In one embodiment, the length of the first crown is greater than the length of the second crown; the bottom surfaces of the first crown and the second crown are on the same horizontal plane, the top surface of the first crown is higher than the top surface of the second crown; and / or, the number of second crowns is the same between each pair of adjacent first crowns.

[0010] In one embodiment, the chain clamp includes a first movable component, a second movable component, and a linkage assembly; there are multiple first movable components and multiple second movable components; the multiple first movable components are sequentially and movably disposed on an inner rail, and the multiple second movable components are sequentially and movably disposed on an outer rail; the first movable components and the second movable components are alternately disposed; the first movable component includes a first body, and the first axle cap and the second axle cap are selectively connected to the first body;

[0011] The second moving component includes a second body and a clamp disposed on the second body; there are multiple connecting rod assemblies, which are correspondingly disposed between adjacent first moving components and second moving components, one end of the connecting rod assembly is rotatably connected to the first body, and the other end of the connecting rod assembly is rotatably connected to the second body; the multiple shaft crowns also include multiple third shaft crowns, each of the third shaft crowns being correspondingly connected to each of the second bodies.

[0012] In one embodiment, when the chain clamp is in a fully folded state, any two adjacent first bodies at the fully folded portion of the chain clamp abut against each other along the running direction, and / or the distance between two adjacent first shaft crowns at the fully folded portion of the chain clamp is equal to the tooth pitch value of the slow-speed chain disc.

[0013] In one embodiment, the chain clamp drive device further includes a fast chain disc, which has a plurality of second teeth arranged at intervals around its outer periphery, with two adjacent second teeth cooperating to form a second tooth groove; when the chain clamp is in a fully extended state, the distance between any two adjacent shaft crowns at the fully extended part of the chain clamp is equal to the tooth pitch value of the fast chain disc.

[0014] In one embodiment, the first tooth groove has a guide surface on at least one side along the rotation direction of the slow-speed chain, and the guide surface is guided and engaged with the first shaft crown.

[0015] In one embodiment, the inner wall of the first tooth groove includes a wrapping surface that is adapted to the shape of the outer wall of the first shaft crown, one side of each of the two guide surfaces is respectively connected to the opposite sides of the wrapping surface, and the other side of the two guide surfaces extends to the outer peripheral surface of the slow chain in a direction away from each other.

[0016] The guide surface includes a first guide portion, a second guide portion, and a transition portion. The first guide portion, the transition portion, and the second guide portion are connected in sequence. The side of the first guide portion away from the transition portion is connected to the outer peripheral surface, and the side of the second guide portion away from the transition portion is connected to the wrapping surface. The included angle between the two first guide portions is greater than the included angle between the two second guide portions.

[0017] In one embodiment, the first tooth groove is provided with guide surfaces on both sides of the opposite sides along the rotation direction of the slow chain; the two guide surfaces are arranged symmetrically to each other, and / or, the guide path length between the opposite edges of the guide surfaces along the rotation direction of the slow chain is set as S, the diameter of the shaft crown is set as D, and S / D≥20%.

[0018] On the other hand, this application provides a film mechanical synchronous stretching track, including the chain clamp drive device and an annular guide rail, wherein the chain clamp is movably disposed on the annular guide rail.

[0019] In another aspect, this application also provides a film production line, including the aforementioned film mechanical synchronous stretching track, and a high-temperature oven. The film mechanical synchronous stretching track is provided in two parallel and spaced-apart tracks that cooperate with each other to clamp and pull the film into the high-temperature oven.

[0020] In the aforementioned film production line, film machinery synchronous stretching track, and chain clamp drive device, when two adjacent first shaft crowns are respectively inserted into two adjacent first tooth grooves, all the second shaft crowns located between the two adjacent first shaft crowns are covered by the projection of the first tooth portion along the axial direction of the slow-speed chain disc. That is, the slow-speed chain disc does not have tooth grooves corresponding to the positions of the second shaft crowns; it mainly drives the chain clamp movement by directly acting on the first shaft crowns. Furthermore, the projection of the first tooth portion along the axial direction of the slow-speed chain disc can cover all the second shaft crowns between the two adjacent first shaft crowns, indicating that the width of the first tooth portion is relatively large, resulting in greater structural strength, less wear and damage, effectively reducing the risk of misalignment and meshing between the chain teeth and the chain clamp, lowering the failure rate, and making it suitable for high-speed operation, thereby improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a thin film production line according to an embodiment of this application.

[0022] Figure 2 for Figure 1 The diagram shows a partial structural diagram of the synchronous stretching track for film machinery in a film production line.

[0023] Figure 3 for Figure 2 Enlarged structural diagram at point A.

[0024] Figure 4 for Figure 2 Enlarged structural diagram at point B.

[0025] Figure 5 for Figure 2 The diagram shows a partial structural diagram of the chain clamp and annular guide rail in the synchronous stretching track for thin film machinery.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. High-temperature oven; 20. Circular guide rail; 21. Inner rail; 22. Outer rail; 23. Return section; 24. Recovery section; 30. Chain clamp; 31. First moving assembly; 311. First main body; 32. Second moving assembly; 321. Second main body; 322. Clamp; 33. Linkage assembly; 34. First shaft crown; 35. Second shaft crown; 36. Third shaft crown; 40. Drive sprocket; 41. Slow-speed sprocket; 411. First tooth; 412. First tooth groove; 413. Guide surface; 4131. First guide part; 4132. Second guide part; 4133. Transition part; 414. Wrapping surface; 42. Fast sprocket; 421. Second tooth; 422. Second tooth groove; 50. Film. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] As described in the background section, slow-speed sprockets in related technologies are prone to wear and high failure rates, leading to frequent downtime for maintenance and high costs. This is because, to match the spacing of adjacent shaft crowns in the chain clamp, the tooth pitch of slow-speed sprockets in related technologies is often extremely close. In other words, the tooth spacing on slow-speed sprockets is small, and the number of tooth grooves is large. When the tooth grooves on the outer periphery of the slow-speed sprocket are densely packed, each tooth becomes sharp, resulting in relatively weak mechanical strength. This means that the chain clamp must dynamically and precisely match the tooth grooves of the slow-speed sprocket when it re-closes; otherwise, serious mechanical failures such as tooth skipping will immediately occur. The shaft crowns of the chain clamp and the slow-speed sprocket will also be systematically damaged, leading to irreparable damage or even scrapping.

[0030] Furthermore, as the market demands for continuously improving film production efficiency, film production lines will also evolve towards high-speed operation. Under continuous high-speed operation, chain clamps are prone to various issues such as sudden changes in stability, wear and tear on parts leading to decreased precision, and occasional control failures, which seriously affect the normal operation of high-speed film production lines.

[0031] It should be noted that the "shaft crown" in this embodiment can also be understood as a shaft body set on the chain clamp, which cooperates with the tooth groove of the drive chain. When the drive chain rotates, it drives the shaft body to move accordingly, which can provide power to the chain clamp to move along the annular guide rail.

[0032] Based on the above reasons, this application provides a film production line, a film mechanical synchronous stretching track and a chain clamp drive device, which can reduce or even avoid tooth failures of the drive chain and reduce the failure rate, and is suitable for high-speed operation, thereby improving production efficiency.

[0033] It should be noted that in this embodiment, "lateral" refers to the width direction of the film, that is, as shown in the figure. Figure 1 The direction indicated by the arrow Y; the longitudinal direction refers to the length of the film, or the direction of movement of the film, that is, as shown in the image. Figure 1 The direction indicated by the arrow X in the diagram.

[0034] Please see Figure 1 , Figure 1A schematic diagram of a film production line according to an embodiment of this application is shown. An embodiment of this application provides a film production line including a high-temperature oven 10 and two film mechanical synchronous stretching tracks. The two film mechanical synchronous stretching tracks are arranged side-by-side at intervals and cooperate with each other to clamp and pull the film 50 into the high-temperature oven 10, allowing the film 50 to undergo various processes within the high-temperature oven 10. Specifically, the two film mechanical synchronous stretching tracks clamp the film 50 on opposite sides in the transverse direction at the entrance side of the high-temperature oven 10 and provide power to pull the film 50 into the high-temperature oven 10, where it undergoes various processes including but not limited to preheating, stretching, heat setting, and cooling. After the film 50 leaves the high-temperature oven 10 after processing, the two film mechanical synchronous stretching tracks release the film 50 at the exit side of the high-temperature oven 10, allowing the film 50 to continue moving to the next process.

[0035] See Figures 2 to 5 , Figure 2 for Figure 1 The diagram shows a partial structural diagram of the synchronous stretching track for film machinery in a film production line. Figure 3 for Figure 2 Enlarged structural diagram at point A. Figure 4 for Figure 2 Enlarged structural diagram at point B. Figure 5 for Figure 2 The diagram shows a partial structural representation of the chain clamp 30 and the annular guide rail 20 in the film mechanical synchronous stretching track. The following is a related diagram. Figures 1 to 5 This application provides a detailed description of a film mechanical synchronous stretching track.

[0036] Please continue reading. Figure 1 and Figure 2 For example, the film mechanical synchronous stretching track includes an annular guide rail 20 and a chain clamp drive device. The chain clamp drive device includes chain clamps 30 and multiple drive chain discs 40. The chain clamps 30 are used to clamp one side of the film 50 in the transverse direction. The chain clamps 30 of the two film mechanical synchronous stretching tracks are respectively used to clamp opposite sides of the film 50 in the transverse direction. The annular guide rail 20 is used to support and guide the chain clamps 30. Under the synchronous drive of the various drive chain discs 40, the chain clamps 30 move circumferentially and reciprocally along the annular guide rail 20.

[0037] Please continue reading. Figure 1 and Figure 2Optionally, each annular guide rail 20 includes an inner rail 21 and an outer rail 22. Both the inner rail 21 and the outer rail 22 are annular in shape, spaced apart, with the outer rail 22 surrounding the inner rail 21. When the chain clamp 30 runs on the annular guide rail 20, it adjusts the spacing of adjacent clamps 322 according to the distance between the inner rail 21 and the outer rail 22 of the annular guide rail 20. Specifically, when the distance between the inner rail 21 and the outer rail 22 decreases, the spacing of adjacent clamps 322 increases; when the distance between the inner rail 21 and the outer rail 22 increases, the spacing of adjacent clamps 322 decreases; when the distance between the inner rail 21 and the outer rail 22 remains unchanged, the spacing of adjacent clamps 322 remains unchanged.

[0038] Please see Figure 5 For example, the chain clamp 30 includes a first moving component 31, a second moving component 32, and a link assembly 33. There are multiple first moving components 31 and multiple second moving components 32. Multiple first moving components 31 are sequentially and movably mounted on the inner rail 21, and multiple second moving components 32 are sequentially and movably mounted on the outer rail 22. The first moving components 31 and second moving components 32 are alternately arranged. Each first moving component 31 includes a first body 311, and each second moving component 32 includes a second body 321 and a clamp 322 mounted on the second body 321. Multiple link assemblies 33 are correspondingly arranged between adjacent first moving components 31 and second moving components 32. One end of each link assembly 33 is rotatably connected to the first body 311, and the other end is rotatably connected to the second body 321.

[0039] Please see Figures 2 to 4 The drive chain disks 40 include a slow chain disk 41. The slow chain disk 41 has a plurality of first teeth 411 arranged sequentially at intervals around its outer periphery, and two adjacent first teeth 411 cooperate to form a first tooth groove 412.

[0040] The chain clamp 30 is provided with a plurality of axle crowns arranged sequentially along its length. These axle crowns include a plurality of first axle crowns 34 and a plurality of second axle crowns 35, with at least one second axle crown 35 positioned between any two adjacent first axle crowns 34. The first axle crowns 34 engage with the first tooth grooves 412 and are used to drive the chain clamp 30, while the second axle crowns 35 avoid the slow-speed chain disc 41. The two adjacent first axle crowns 34 and all the second axle crowns 35 located between them are arranged sequentially along the direction of movement of the chain clamp 30, i.e., in a straight line or an arc, the specific arrangement depending on the shape of the guide rail annular guide rail 20. Furthermore, when two adjacent first axle crowns 34 are respectively inserted into two adjacent first tooth grooves 412, all the second axle crowns 35 located between the two adjacent first axle crowns 34 are covered by the projection of the first tooth portion 411 along the axial direction of the slow-speed chain disc 41.

[0041] In the aforementioned chain clamp drive device, when two adjacent first shaft crowns 34 are respectively inserted into two adjacent first tooth grooves 412, all second shaft crowns 35 located between the two adjacent first shaft crowns 34 are covered by the projection of the first tooth portion 411 along the axial direction of the slow-speed chain disc 41. That is, the slow-speed chain disc 41 does not have tooth grooves corresponding to the positions of the second shaft crowns 35, and mainly drives the chain clamp 30 to move by directly acting on the first shaft crowns 34. Furthermore, the projection of the first tooth portion 411 along the axial direction of the slow-speed chain disc 41 can cover all the second shaft crowns 35 between the two adjacent first shaft crowns 34, indicating that the width of the first tooth portion 411 is relatively large, resulting in greater structural strength, less wear and damage, effectively reducing the risk of misalignment and engagement between the first tooth portion 411 and the chain clamp 30, reducing the failure rate, and making it suitable for high-speed operation, thereby improving production efficiency.

[0042] For example, the first crown 34 and the second crown 35 are selectively connected to the first body 311. Specifically, for example, the first crown 34 and the second crown 35 are alternately arranged on the first body 311 according to the arrangement order of the first body 311.

[0043] For example, the plurality of crowns also include a plurality of third crowns 36, each third crown 36 being connected to a corresponding second body 321.

[0044] The third axle crown 36 can be consistent with the first axle crown 34 or the second axle crown 35, specifically a long axle crown or a short axle crown; of course, the third axle crown 36 can also be different from the first axle crown 34 and the second axle crown 35, which is not restricted here.

[0045] It is worth noting that as the chain clamp 30 travels along the annular guide rail 20 through the slow-speed chain disk 41, the chain clamp 30 is in a fully folded state, which causes the second body 321 and the third shaft crown 36 to always avoid the slow-speed chain disk 41. Thus, the third shaft crown 36 cannot be directly driven by the slow-speed chain disk 41.

[0046] For the high-speed chainring 42 with a large tooth pitch, the risk of misalignment and skipped teeth is very low, and there is no need to separately drive the chain clamps 30. For the slow-speed chainring 41 with a small tooth pitch, taking the example of a second shaft crown 35 between any two adjacent first shaft crowns 34, the density of the first teeth 411 is reduced by 50% compared to related technologies. This allows the tooth pitch of the slow-speed chainring 41 to be increased by a factor of two, and the width of each first tooth 411 is increased accordingly. Various defects such as easy wear and damage caused by the sharp tooth tips are effectively improved.

[0047] Please see Figures 3 to 5In some embodiments, the length of the first axle crown 34 is greater than the length of the second axle crown 35. This can also be understood as the first axle crown 34 being a long axle crown and the second axle crown 35 being a short axle crown. The bottom surfaces of the first axle crown 34 and the second axle crown 35 are on the same horizontal plane, and with this horizontal plane as a reference, the top surface of the first axle crown 34 is higher than the top surface of the second axle crown 35. Thus, when the first axle crown 34 enters the slow-speed chainring 41, the portion of the first axle crown 34 that is higher than the second axle crown 35 enters the first tooth groove 412. The second axle crown 35 is located directly below the first tooth portion 411, thus avoiding the first tooth portion 411. Consequently, the portion of the slow-speed chainring 41 corresponding to the second axle crown 35 does not need to have a tooth groove, resulting in fewer tooth grooves and a correspondingly increased width of the first tooth portion 411.

[0048] Please see Figures 2 to 5 In some embodiments, the number of second axle crowns 35 between each pair of adjacent first axle crowns 34 is the same. The arrangement of the first axle crowns 34 and second axle crowns 35, when cooperating with the slow-speed chain 41, is such that multiple first axle crowns 34 are correspondingly inserted into multiple first tooth grooves 412, while each second axle crown 35 avoids the slow-speed chain 41. Optionally, the number of second axle crowns 35 between each pair of adjacent first axle crowns 34 can be one, two, three, or other numbers, which is not limited here. When the number of second axle crowns 35 between each pair of adjacent first axle crowns 34 is large, for example greater than three, that is, the tooth pitch value of the slow-speed chain 41 is large, although this increases the structural strength of the first tooth portion 411 of the slow-speed chain 41, it reduces the number of first axle crowns 34 driven by the slow-speed chain 41, and reduces the operational stability of the chain clamp 30. Therefore, in this embodiment, the number of second axle crowns 35 between each pair of adjacent first axle crowns 34 is preferably one, two, or three. Specifically, in this embodiment, the second axle crown 35 between each pair of adjacent first axle crowns 34 is described as one example. The first axle crowns 34 and the second axle crowns 35 are alternately connected to the first body 311.

[0049] Please see Figures 1 to 4For example, the multiple drive chain disks 40 also include a fast chain disk 42. The number of fast chain disks 42 in the chain clamp drive device is, but not limited to, one, two, or three. In this application, two fast chain disks 42 in the chain clamp drive device are specifically used as an example, but this is not a limitation. The two fast chain disks 42 are respectively arranged on the inlet side and the outlet side of the high-temperature oven 10. The slow chain disk 41 is located on the inlet side of the high-temperature oven 10. The two fast chain disks 42 and the slow chain disk 41 cooperate with each other to drive the chain clamp 30 to move along the annular guide rail 20. The rotational speed of the slow chain disk 41 and the fast chain disk 42 is not specifically limited here, and can be flexibly adjusted and set according to actual needs. Among them, the fast chain disk 42 is provided with a plurality of second teeth 421 arranged sequentially at intervals around its outer periphery, and two adjacent second teeth 421 cooperate to form a second tooth groove 422. When the chain clamp 30 is in the fully extended state, that is, when the chain clamp 30 moves to the return section 23, the distance between any two adjacent axle crowns at the fully extended part of the chain clamp 30 is equal to the tooth pitch of the fast sprocket 42. Thus, each axle crown of the extended chain clamp 30 can enter the second tooth groove 422. When the chain clamp 30 is in the fully folded state, that is, when the chain clamp 30 moves from the recovery section 24 to the entrance side of the annular guide rail 20, or in other words, to the part that engages with the slow sprocket 41, the distance between two adjacent first axle crowns 34 at the fully folded part of the chain clamp 30 is equal to the tooth pitch of the slow sprocket 41. Thus, each first axle crown 34 in the folded chain clamp 30 can enter the first tooth groove 412.

[0050] In some embodiments, when the chain clamp 30 is in a fully folded state, any two adjacent first bodies 311 at the fully folded portion of the chain clamp 30 abut against each other along the running direction. Thus, while the slow-speed chain disc 41 stably drives each of the passing first axle crowns 34, the width of the first bodies 311 is flexibly adjusted and controlled to ensure close proximity between adjacent first bodies 311. This helps to transmit the driving force of the slow-speed chain disc 41 to the second body 321, thereby enabling the chain clamp 30 to be smoothly driven by the slow-speed chain disc 41.

[0051] The width of the first body 311 refers to the distance between two opposite sides of the first body 311 along the running direction.

[0052] The annular guide rail 20 includes a recovery section 24. The recovery section 24 is located between the fast-speed chain wheel 42 and the slow-speed chain wheel 41 on the inlet side of the high-temperature oven 10. The distance between the inner rail 21 and the outer rail 22 of the recovery section 24 increases along the direction of movement of the chain clamp 30. Therefore, during the movement of the chain clamp 30 to the recovery section 24, the distance between adjacent first bodies 311 gradually decreases until they abut against each other along the direction of movement, and the distance between adjacent second bodies 321 gradually decreases until they abut against each other along the direction of movement. The movement speed of the chain clamp 30 gradually decreases from the high speed of the return section 23 to a slow speed.

[0053] During the operation of the chain clamp 30 and the slow-speed chain disc 41, in order to improve the stability of the first shaft crown 34 entering the first tooth groove 412, auxiliary guiding measures for the dynamic entry of the first shaft crown 34 into the tooth can be adopted in this embodiment.

[0054] Please see Figure 4 As the pitch value of the slow chain 41 increases by a multiple, sufficient space is created to set an effective guide surface 413. The auxiliary guiding effect enables the first shaft crown 34 to be reliably connected, gripped, and driven by the slow chain 41. Even if the track chain clamp 30 mechanism experiences slight fluctuations during high-speed operation, the stability can be effectively improved, and the occurrence of serious consequences can be suppressed to the greatest extent.

[0055] Please see Figure 4 For example, the first tooth groove 412 has a guide surface 413 on at least one side along the rotation direction of the slow-speed sprocket 41, or guide surfaces 413 on both opposite sides. The guide surface 413 guides and engages with the first shaft crown 34. Thus, as the chain clamp 30 passes through the slow-speed sprocket 41, the guide surface 413 guides the first shaft crown 34, allowing the first shaft crown 34 to smoothly enter the first tooth groove 412, improving operational stability.

[0056] When the first tooth groove 412 is provided with guide surfaces 413 on both sides of the rotation direction of the slow-speed chain 41, the guiding effect on the first shaft crown 34 will be further enhanced.

[0057] Based on the aforementioned embodiment, the two guide surfaces 413 are arranged symmetrically to each other.

[0058] Based on the aforementioned embodiment, the inner wall of the first tooth groove 412 further includes a wrapping surface 414. The wrapping surface 414 adapts to the outer wall of the first shaft crown 34. The wrapping surface 414 is arc-shaped. The angle of the arc shape includes, but is not limited to, 120°, 150°, 180°, 210°, or any value between 120° and 210°. Each of the two guide surfaces 413 is connected to the opposite sides of the wrapping surface 414 on one side along the rotation direction. The two guide surfaces 413 are inclined away from each other on the side away from the wrapping surface 414 and extend to the outer peripheral surface of the slow-speed chain 41. Both guide surfaces 413 serve a guiding function, allowing the first shaft crown 34 to enter the wrapping surface 414. When the first shaft crown 34 enters the wrapping surface 414, it abuts against the wrapping surface 414.

[0059] Based on the aforementioned embodiment, the guide path length between the opposite two edges of the guide surface 413 along the rotation direction of the slow-speed chain disc 41 is set as S, and the diameter of the shaft crown is set as D, with S / D ≥ 20%. Specifically, S / D includes, but is not limited to, 20%, 30%, 50%, 80%, or 100%. In this way, the guide path length S is relatively large, which can ensure that the guide surface 413 and the first shaft crown 34 abut against each other and guide each other during the movement of the slow-speed chain disc 41 and the chain clamp 30.

[0060] Optionally, S / D ≤ 300%. When the length S of the guide path is too large, it will increase the smoothness of the guide surface 413 and affect the guiding effect. Therefore, the length S of the guide path satisfies S / D ≤ 300% to ensure the guiding effect of the guide surface 413.

[0061] The guide path between the two opposite edges can be understood as a path that selects a point on one edge as the starting point and moves from the starting point along the guide surface 413 in a direction perpendicular to the edge to the other edge.

[0062] Based on the aforementioned embodiments, the guide surface 413 may be one or any combination of plane, arc surface, curved surface, polygonal surface, etc., and can be flexibly adjusted and set according to actual needs, without limitation.

[0063] Please see Figure 4 In one specific embodiment, the guide surface 413 includes a first guide portion 4131, a second guide portion 4132, and a transition portion 4133. The first guide portion 4131, the transition portion 4133, and the second guide portion 4132 are connected sequentially. The side of the first guide portion 4131 away from the transition portion 4133 is connected to the outer peripheral surface, and the side of the second guide portion 4132 away from the transition portion 4133 is connected to the wrapping surface 414. The included angle between the two first guide portions 4131 is greater than the included angle between the two second guide portions 4132. Thus, the larger included angle between the two first guide portions 4131 can quickly guide the first shaft crown 34. The smaller included angle between the two second guide portions 4132 is smaller than the included angle between the two first guide portions 4131, allowing the first shaft crown 34 to accurately enter the first tooth groove 412.

[0064] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A chain clamp drive device, characterized in that, The chain clamp drive device includes: Slow-speed chain disk, wherein the slow-speed chain disk has a plurality of first teeth arranged at intervals around its outer periphery, and two adjacent first teeth cooperate to form a first tooth groove; and The chain clamp has a plurality of axle crowns arranged sequentially along its length. The plurality of axle crowns includes a plurality of first axle crowns and a plurality of second axle crowns. At least one second axle crown is provided between any two adjacent first axle crowns. The top surface of the first axle crown is higher than the top surface of the second axle crown. The first axle crowns cooperate with the first tooth grooves and are used to drive the chain clamp to move. The second axle crowns can avoid the slow-speed chain disc. Two adjacent first axle crowns and all the second axle crowns located between two adjacent first axle crowns are arranged sequentially along the movement direction of the chain clamp. When two adjacent first axle crowns are respectively inserted into two adjacent first tooth grooves, all the second axle crowns located between two adjacent first axle crowns are covered by the projection of the first tooth portion along the axial direction of the slow-speed chain disc.

2. The chain clamp drive device according to claim 1, characterized in that, The length of the first axle crown is greater than the length of the second axle crown; the bottom surfaces of the first axle crown and the second axle crown are on the same horizontal plane; and / or, the number of second axle crowns between each pair of adjacent first axle crowns is the same.

3. The chain clamp drive device according to claim 1, characterized in that, The chain clamp includes a first moving component, a second moving component, and a connecting rod assembly; there are multiple first moving components and multiple second moving components; the multiple first moving components are movably disposed sequentially on the inner rail, and the multiple second moving components are movably disposed sequentially on the outer rail; the first moving components and the second moving components are alternately disposed; the first moving component includes a first body, and the first axle cap and the second axle cap are selectively connected to the first body; The second moving component includes a second body and a clamp disposed on the second body; there are multiple connecting rod assemblies, which are correspondingly disposed between adjacent first moving components and second moving components, one end of the connecting rod assembly is rotatably connected to the first body, and the other end of the connecting rod assembly is rotatably connected to the second body; the multiple shaft crowns also include multiple third shaft crowns, each of the third shaft crowns being correspondingly connected to each of the second bodies.

4. The chain clamp drive device according to claim 3, characterized in that, When the chain clamp is in a fully folded state, any two adjacent first bodies at the fully folded part of the chain clamp abut against each other along the running direction, and / or the distance between two adjacent first shaft crowns at the fully folded part of the chain clamp is equal to the tooth pitch value of the slow-speed chain.

5. The chain clamp drive device according to claim 1, characterized in that, The chain clamp drive device also includes a fast chain disc, which has a plurality of second teeth arranged at intervals around its outer circumference, with two adjacent second teeth cooperating to form a second tooth groove; when the chain clamp is in a fully extended state, the distance between any two adjacent shaft crowns at the fully extended part of the chain clamp is equal to the tooth pitch value of the fast chain disc.

6. The chain clamp drive device according to claim 1, characterized in that, The first tooth groove has a guide surface on at least one side along the rotation direction of the slow-speed chain, and the guide surface is guided and engaged with the first shaft crown.

7. The chain clamp drive device according to claim 6, characterized in that, The inner wall of the first tooth groove includes a wrapping surface, which is adapted to the shape of the outer wall of the first shaft crown. One side of each of the two guide surfaces is respectively connected to the opposite sides of the wrapping surface, and the other side of each of the two guide surfaces extends to the outer peripheral surface of the slow-speed chain track in a direction away from each other. The guide surface includes a first guide portion, a second guide portion, and a transition portion. The first guide portion, the transition portion, and the second guide portion are connected in sequence. The side of the first guide portion away from the transition portion is connected to the outer peripheral surface, and the side of the second guide portion away from the transition portion is connected to the wrapping surface. The included angle between the two first guide portions is greater than the included angle between the two second guide portions.

8. The chain clamp drive device according to claim 6, characterized in that, The first tooth groove is provided with guide surfaces on both sides of the slow-speed chain drive rotation direction; the two guide surfaces are arranged symmetrically to each other, and / or the guide path length between the opposite edges of the guide surfaces along the slow-speed chain drive rotation direction is set as S, the diameter of the shaft crown is set as D, and S / D≥20%.

9. A film mechanical synchronous stretching track, characterized in that, The device includes the chain clamp drive as described in any one of claims 1 to 8, and further includes an annular guide rail, wherein the chain clamp is movably disposed on the annular guide rail.

10. A thin film production line, characterized in that, The device includes the film mechanical synchronous stretching track as described in claim 9, and also includes a high-temperature oven. The film mechanical synchronous stretching track is provided in two, which are arranged side by side at intervals and cooperate with each other to clamp and pull the film into the high-temperature oven.

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