Traction device and processing equipment

Abstract

The present invention discloses a traction device and a processing equipment. The traction device includes a base body, a driving member, a traction structure and an auxiliary traction assembly. The driving member is arranged on the base body; the traction structure is arranged on the base body and is in transmission connection with the driving member. The traction structure is provided with a traction channel for traction of a heat shrinkable tube; the auxiliary traction assembly is arranged on the base body and is in transmission connection with the driving member. The auxiliary traction assembly is provided with an auxiliary traction channel for traction of the heat shrinkable tube. The auxiliary traction channel and the traction channel are arranged at intervals and in parallel. The traction device of the present invention can ensure that the heat shrinkable tube has a stable and continuous traction force after exiting the mold during expansion, enabling the expansion to proceed stably and reducing defective products.

Description

Technical Field

[0001] The invention relates to the technical field of heat shrink tube processing equipment, and in particular to a traction device and processing equipment using the traction device. Background Art

[0002] During the processing of heat shrink tubing, after expansion and production out of the mold, a continuous and stable traction force needs to be given to the heat shrink tubing. In the related technology, a set of powered pressure rubber wheels are usually used to clamp the heat shrink tubing for continuous traction output. The pressure rubber wheels clamp the heat shrink tubing, and the heat shrink tubing needs to be flattened to a certain extent before the traction force can be transferred to the heat shrink tubing. If the heat shrink tubing is deformed too much, it will affect the circulation of compressed gas in the tube, and then affect the expansion. If the heat shrink tubing is deformed too little, the clamping force is insufficient, and it is easy to slip, resulting in unstable traction, all of which will cause the heat shrink tubing to produce defective products or crash. Summary of the invention

[0003] The main purpose of the present invention is to provide a traction device and processing equipment, which aims to provide a traction device that can stably clamp and pull the expanded heat shrink tube out, avoid the clamping force being too loose to slip or too tight to hinder the flow of gas in the tube, causing unstable expansion and then leading to a freeze. The traction device can ensure that the heat shrink tube has a stable and continuous traction force after it leaves the mold during expansion, so that the expansion can be carried out stably and defective products can be reduced.

[0004] To achieve the above object, the present invention provides a traction device for traction of the expanded heat shrinkable tube, the traction device comprising:

[0005] matrix;

[0006] A driving member, wherein the driving member is disposed on the base;

[0007] A traction structure, which is disposed on the base and is drivingly connected to the driving member, and the traction structure is provided with a traction channel for traction of the heat shrink tube; and

[0008] An auxiliary traction component is arranged on the base and is drivingly connected to the driving member. The auxiliary traction component is provided with an auxiliary traction channel for traction of the heat shrink tube, and the auxiliary traction channel is spaced apart and arranged in parallel with the traction channel.

[0009] In one embodiment, the traction structure comprises:

[0010] A mounting seat, the mounting seat being arranged on the base;

[0011] Two track assemblies, two of the track assemblies are spaced apart and arranged in parallel through the mounting base, one end of each of the two track assemblies is provided with a track, the other ends of the two track assemblies are drivingly connected, one end of a track assembly away from the track is provided with a first pulley, the first pulley is drivingly connected with the driving member through a transmission belt, the two tracks are arranged oppositely and cooperate to form the traction channel; and

[0012] A first protective cover, the first protective cover is provided with a first cavity and a first notch communicating with the first cavity, the track is received in the first cavity and partially exposed at the first notch, and the traction channel is correspondingly communicated with the first notch.

[0013] In one embodiment, each of the track assemblies includes:

[0014] Two track shafts, the two track shafts are spaced apart and arranged in parallel through the mounting base;

[0015] Two traction wheels, each traction wheel is arranged at one end of a track shaft, and the track is sleeved on the two traction wheels;

[0016] Two first gears, each first gear is arranged at one end of a track shaft away from the traction wheel, and the two first gears are drivingly connected by a chain; and

[0017] A second gear, the second gear is arranged at one end of a track shaft away from the traction wheel, and the second gear is arranged at an interval from the first gear;

[0018] Wherein, the second gear of one track assembly meshes with the second gear of the other track assembly.

[0019] In one embodiment, the mounting base includes a first mounting base fixedly arranged on the base body and a second mounting base movably arranged on the base body, the first mounting base and the second mounting base are provided with coaxially arranged mounting holes, one track assembly is arranged through the first mounting base, and the other track assembly is arranged through the second mounting base;

[0020] The traction structure further includes an adjusting assembly, and the adjusting assembly includes:

[0021] An adjusting member, the adjusting member includes an adjusting rod and a first hand wheel arranged at one end of the adjusting rod, and the adjusting rod rotates through the two mounting holes; and

[0022] A return spring, the return spring is sleeved on the adjusting rod, and two ends of the return spring are elastically abutted against the first mounting base and the second mounting base respectively;

[0023] Wherein, the first handwheel drives the adjusting rod to rotate, so that the second mounting seat approaches or moves away from the first mounting seat.

[0024] In one embodiment, the second mounting seat is provided with a chute, the base body is provided with a slide rail, and the chute is in sliding fit with the slide rail.

[0025] In one embodiment, the auxiliary traction assembly includes:

[0026] A fixed seat, which is arranged on the base body;

[0027] Two auxiliary shafts, the two auxiliary shafts are spaced apart and parallelly penetrate through the fixed seat. One ends of the two auxiliary shafts are provided with auxiliary traction wheels, the other ends of the two auxiliary shafts are provided with third gears, the two third gears are meshed and connected. One end of an auxiliary shaft away from the auxiliary traction wheel is provided with a second pulley, the second pulley is spaced from the third gear and is in transmission connection with the driving member through a transmission belt. The two auxiliary traction wheels are arranged oppositely and cooperate to form the auxiliary traction channel; and

[0028] A second protective cover, the second protective cover is provided with a second cavity and a second notch communicating with the second cavity. The two auxiliary traction wheels are accommodated in the second cavity and partially exposed at the second notch, and the auxiliary traction channel is correspondingly communicated with the second notch.

[0029] In one embodiment, the fixed seat includes a fixed main body arranged on the base body and a sliding plate. The fixed main body is provided with a movable groove, the sliding plate is slidably connected in the movable groove, one auxiliary shaft penetrates through the fixed main body, and the other auxiliary shaft penetrates through the sliding plate;

[0030] The auxiliary traction assembly further includes:

[0031] A mounting plate, which is arranged at the notch of the movable groove, and the mounting plate is provided with an adjusting hole communicating with the movable groove; and

[0032] An adjusting screw rod, which rotatably penetrates through the adjusting hole, one end of the adjusting screw rod extending into the movable groove is rotatably connected to the sliding plate, and the other end of the adjusting screw rod is provided with a second handwheel;

[0033] Wherein, the second handwheel drives the adjusting screw rod to rotate, so that the sliding plate approaches or moves away from the mounting plate.

[0034] In one embodiment, the traction device further includes a limiting assembly, and the limiting assembly is arranged on the base body and is located between the traction structure and the auxiliary traction assembly;

[0035] The limiting assembly includes:

[0036] A fixing plate, one end of the fixing plate is connected to the base; and

[0037] Two limiting rods, the two limiting rods are arranged at the end of the fixing plate away from the base, the two limiting rods are parallel and spaced apart, and cooperate to form a limiting groove for accommodating the limiting heat shrinkable tube, and one end of the limiting groove is located on the same straight line as the traction channel and one end of the auxiliary traction channel.

[0038] In one embodiment, the traction device further includes a tensioning assembly, the tensioning assembly is arranged between the traction structure and / or the auxiliary traction assembly and the driving member, and the tensioning assembly includes:

[0039] A limiting plate, the limiting plate is arranged on the base, and the limiting plate is provided with a strip-shaped hole;

[0040] A roller shaft, one end of the roller shaft passes through the strip-shaped hole, and a screw hole is arranged at the end of the roller shaft extending into the strip-shaped hole;

[0041] A roller, the roller is rotatably sleeved on the roller shaft and abuts against the transmission belt; and

[0042] A screw rod, one end of the screw rod penetrates through the base and the limiting plate and extends into the strip-shaped hole, and is arranged in the screw hole;

[0043] Wherein, the screw rod is rotatable so that the roller shaft moves along the strip-shaped hole.

[0044] The present invention also provides a processing device, including an expansion mold and the above-mentioned traction device, and the expansion mold is arranged opposite to the traction channel of the traction device.

[0045] The traction device of the technical solution of the present invention is provided with a driving member, a traction structure and an auxiliary traction assembly on the base, uses one driving member to drive the traction structure and the auxiliary traction assembly to operate at the same time, and uses the traction channel of the traction structure and the auxiliary traction channel of the auxiliary traction assembly to simultaneously traction the heat shrinkable tube, so as to ensure stable clamping and traction output of the expanded heat shrinkable tube, and avoid the instability of expansion caused by too loose clamping force and slipping or too tight clamping force hindering the gas flow in the tube, which may lead to machine failure. The traction device of the present invention not only stably clamps and traction outputs the expanded heat shrinkable tube, avoids the instability of expansion caused by too loose clamping force and slipping or too tight clamping force hindering the gas flow in the tube, which may lead to machine failure, but also can ensure that the heat shrinkable tube has a stable and continuous traction force after leaving the mold during expansion, so that the expansion proceeds stably and the number of defective products is reduced. Description of the Drawings

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0047] Figure 1 Structural schematic diagram of the traction device in an embodiment of the present invention;

[0048] Figure 2 Partial exploded view of the traction structure in an embodiment of the present invention;

[0049] Figure 3 Partial exploded view of the auxiliary traction component in an embodiment of the present invention;

[0050] Figure 4 Structural schematic diagram of the tensioning component in an embodiment of the present invention.

[0051] Explanation of the reference numerals in the drawings:

[0052] Label Name Label Name Label Name 100 Traction device 326 First pulley 461 Second cavity 1 Substrate 327 Adjustment component 462 Second notch 11 Base plate 3271 Adjusting part 471 Mounting plate 12 Protective cover 3272 Adjusting rod 472 Adjusting hole 13 Slide rail 3273 First handwheel 473 Adjusting screw 2 Driving part 3274 Return spring 474 Second handwheel 21 Drive belt 33 First protective cover 5 Limit component 3 Traction structure 331 First cavity 51 Fixed plate 31 Mounting seat 332 First notch 52 Limit rod 311 First mounting seat 4 Auxiliary traction component 53 Limit groove 312 Second mounting seat 4a Auxiliary traction channel 6 Tensioning component 313 Mounting hole 41 Fixed seat 61 Limit plate 314 Chute 411 Fixed body 611 Slotted hole 32 Track assembly 412 Moving slot 62 Roller shaft 32a Traction channel 413 Sliding plate 63 Roller 321 Track 42 Auxiliary shaft 64 Screw 322 Track shaft 43 Auxiliary traction wheel 7 Heat shrinkable tube 323 Traction wheel 44 Third gear 8 Expansion die 324 First gear 45 Second pulley 325 Second gear 46 Second protective cover

[0053] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0056] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is to include three scenarios. Taking "A and / or B" as an example, it includes the scenario of A, or the scenario of B, or the scenario where A and B are satisfied simultaneously.

[0057] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] During the processing of the heat shrinkable tube, after it is produced and expanded out of the mold, a continuous and stable traction force needs to be applied to the heat shrinkable tube. In the related art, a set of powered counter-pressure rubber-coated wheels is usually used to clamp the heat shrinkable tube and continuously traction and output it. When the counter-pressure rubber-coated wheels clamp the heat shrinkable tube, the heat shrinkable tube needs to be flattened to a certain extent to transmit the traction force to the heat shrinkable tube. If the heat shrinkable tube is flattened and deformed too much, it will affect the flow of the compressed gas inside the tube, and further affect the expansion. If the heat shrinkable tube is flattened and deformed too little, the clamping force is insufficient, and it is easy to slip, resulting in unstable traction. All of these will cause defective products or machine shutdown of the heat shrinkable tube.

[0059] Based on the above concept and problems, the present invention proposes a traction device 100. It can be understood that this traction device 100 is applied to the processing equipment of the heat shrinkable tube 7 and is used to traction the expanded heat shrinkable tube 7.

[0060] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown, in the embodiment of the present invention, the traction device 100 includes a base body 1, a driving member 2, a traction structure 3 and an auxiliary traction assembly 4. Among them, the driving member 2 is arranged on the base body 1; the traction structure 3 is arranged on the base body 1 and is in transmission connection with the driving member 2. The traction structure 3 is provided with a traction channel 32a for traction the heat shrinkable tube 7; the auxiliary traction assembly 4 is arranged on the base body 1 and is in transmission connection with the driving member 2. The auxiliary traction assembly 4 is provided with an auxiliary traction channel 4a for traction the heat shrinkable tube 7, and the auxiliary traction channel 4a is arranged at intervals and in parallel with the traction channel 32a.

[0061] In this embodiment, the base body 1 is used to install, support and fix structures such as the driving member 2, the traction structure 3, and the auxiliary traction assembly 4. The structure of the base body 1 can be a support frame, a mounting frame, a mounting table, a mounting shell or a housing, etc., which is not limited herein. It can be understood that as Figure 1As shown in the figure, the base body 1 includes a bottom plate 11 and a protective cover 12 provided on the bottom plate 11. An installation cavity is formed by enclosing the protective cover 12 and the bottom plate 11. The driving member 2 is arranged in the installation cavity, and part of the traction structure 3 and the auxiliary traction assembly 4 are arranged in the installation cavity, so as to protect the driving member 2, the traction structure 3 and the components of the auxiliary traction assembly 4 by using the protective cover 12.

[0062] It can be understood that the driving member 2 is used to provide driving force for the traction structure 3 and the auxiliary traction assembly 4. The driving member 2 can be a driving motor, a servo motor, a driving motor or a reduction motor, etc., which is not limited here.

[0063] In this embodiment, the traction structure 3 is used to traction the heat shrinkable tube 7. The traction structure 3 can be a structure such as a traction roller group. By setting the traction channel 32a, the heat shrinkable tube 7 is clamped and traction by using the traction channel 32a. The auxiliary traction assembly 4 is used to traction the heat shrinkable tube 7. The auxiliary traction assembly 4 can be a structure such as a traction roller group. By setting the auxiliary traction channel 4a, the heat shrinkable tube 7 is clamped and traction by using the auxiliary traction channel 4a. It can be understood that by cooperating the auxiliary traction assembly 4 with the traction structure 3, the heat shrinkable tube 7 is tractioned simultaneously by the traction channel 32a of the traction structure 3 and the auxiliary traction channel 4a of the auxiliary traction assembly 4, so as to ensure that the expanded heat shrinkable tube 7 is stably clamped and tractioned out, and avoid the expansion instability caused by too loose clamping force or too tight clamping force hindering the gas flow in the tube, which may lead to system failure.

[0064] The traction device 100 of the present invention sets a driving member 2, a traction structure 3 and an auxiliary traction assembly 4 on the base body 1. By using one driving member 2 to drive the traction structure 3 and the auxiliary traction assembly 4 to run simultaneously, and using the traction channel 32a of the traction structure 3 and the auxiliary traction channel 4a of the auxiliary traction assembly 4 to traction the heat shrinkable tube 7 simultaneously, so as to ensure that the expanded heat shrinkable tube 7 is stably clamped and tractioned out, and avoid the expansion instability caused by too loose clamping force or too tight clamping force hindering the gas flow in the tube, which may lead to system failure. The traction device 100 of the present invention not only stably clamps and tractiones out the expanded heat shrinkable tube 7, and avoids the expansion instability caused by too loose clamping force or too tight clamping force hindering the gas flow in the tube, which may lead to system failure, but also can ensure that the heat shrinkable tube 7 has a stable and continuous traction force after coming out of the mold during expansion, so that the expansion proceeds stably and the number of defective products is reduced.

[0065] In one embodiment, as Figure 1 and Figure 2As shown in the figure, the traction structure 3 includes a mounting base 31, two crawler assemblies 32 and a first protective cover 33. Among them, the mounting base 31 is arranged on the base body 1; the two crawler assemblies 32 are spaced apart and run through the mounting base 31 in parallel. One end of each of the two crawler assemblies 32 is provided with a crawler 321, and the other ends of the two crawler assemblies 32 are drivingly connected. One end of a crawler assembly 32 away from the crawler 321 is provided with a first pulley 326, and the first pulley 326 is drivingly connected to the driving member 2 through a transmission belt 21. The two crawlers 321 are arranged oppositely and cooperate to form a traction channel 32a; the first protective cover 33 is provided with a first cavity 331 and a first notch 332 communicating with the first cavity 331. The crawler 321 is received in the first cavity 331 and partially exposed at the first notch 332, and the traction channel 32a is correspondingly communicated with the first notch 332.

[0066] In this embodiment, the mounting base 31 is used to support, install and fix the two crawler assemblies 32 and the first protective cover 33. The structure of the mounting base 31 can be a structure such as a mounting plate, a mounting shell, a mounting table or a mounting frame, which is not limited herein. It can be understood that the mounting base 31 can be arranged on the bottom plate 11 and / or the protective cover 12 of the base body 1 by welding or integral molding, so as to improve the mounting stability.

[0067] It can be understood that the two crawler assemblies 32 are arranged in parallel and at intervals. The two crawler assemblies 32 pass through the mounting base 31, and one end of each crawler assembly 32 passing through the mounting base 31 is provided with a crawler 321, so that the two crawlers 321 of the two crawler assemblies 32 are arranged oppositely and cooperate to form a traction channel 32a. In order to enable the two crawler assemblies 32 to rotate synchronously, so that the traction channel 32a formed by the two crawlers 321 can drive the heat shrinkable tube 7 to move and realize the traction of the heat shrinkable tube 7, one end of each crawler assembly 32 away from the crawler 321 is drivingly connected, for example, structures such as a transmission belt, a chain or gear meshing are used to realize mutual driving connection.

[0068] In this embodiment, in order to facilitate the driving member 2 to drive the two crawler assemblies 32 to rotate, one end of a crawler assembly 32 away from the crawler 321 is provided with a first pulley 326, and the first pulley 326 is drivingly connected to the driving member 2 through a transmission belt 21. It can be understood that a pulley is provided on the output shaft of the driving member 2, so that the transmission belt 21 is sleeved on the pulley of the driving member 2 and the first pulley 326 of a crawler assembly 32, so that the driving member 2 drives the pulley to drive the transmission belt 21 and the first pulley 326 to rotate, so that the crawler assembly 32 provided with the first pulley 326 rotates, and then drives the other crawler assembly 32 to rotate synchronously, so as to provide power for the traction channel 32a.

[0069] It can be understood that the first protective cover 33 is used to protect the crawler belt 321 and the traction channel 32a. In this embodiment, the first protective cover 33 is in the structure of a shell or a box or a cover, that is, the first protective cover 33 has a first cavity 331. In order to facilitate the heat shrinkable tube 7 in the traction channel 32a to be pulled from the first cavity 331 to the auxiliary traction channel 4a, the first protective cover 33 is provided with a first notch 332 communicating with the first cavity 331, so that a part of the crawler belt 321 is exposed at the first notch 332, and the traction channel 32a is correspondingly communicated with the first notch 332.

[0070] In one embodiment, as Figure 1 and Figure 2 shown, each crawler assembly 32 includes two crawler shafts 322, two traction wheels 323, two first gears 324 and a second gear 325. Among them, the two crawler shafts 322 are spaced apart and parallelly passed through the mounting seat 31; each traction wheel 323 is arranged at one end of a crawler shaft 322, and the crawler belt 321 is sleeved on the two traction wheels 323; each first gear 324 is arranged at one end of a crawler shaft 322 away from the traction wheel 323, and the two first gears 324 are connected by chain drive; the second gear 325 is arranged at one end of a crawler shaft 322 away from the traction wheel 323, and the second gear 325 is arranged at an interval from the first gear 324; among them, the second gear 325 of one crawler assembly 32 meshes with the second gear 325 of another crawler assembly 32.

[0071] In this embodiment, each crawler assembly 32 can be provided with one or two crawler shafts 322. By arranging two crawler shafts 322, the two crawler shafts 322 are spaced apart and parallelly passed through the mounting seat 31, so that the length of the traction channel 32a can be effectively increased, thereby ensuring the traction force of the traction channel 32a on the heat shrinkable tube 7. It can be understood that the crawler shaft 322 can be rotatably installed on the mounting seat 31 through a bearing structure. One end of each crawler shaft 322 is provided with a traction wheel 323, and the other end is provided with a first gear 324, that is, the traction wheel 323 and the first gear 324 are located on opposite sides of the mounting seat 31, so as to avoid the mutual interference between the traction wheel 323 and the first gear 324 on the crawler shaft 322 and achieve force balance.

[0072] It can be understood that the crawler belt 321 is sleeved on the two traction wheels 323 of each crawler assembly 32, so that the two crawler belts 321 of the two crawler assemblies 32 are arranged oppositely, so as to cooperate to form the traction channel 32a. The two crawler shafts 322 are provided with structures such as a chain or a transmission belt sleeved on the two first gears 324 to determine the synchronous rotation of the two crawler shafts 322.

[0073] In this embodiment, by providing a second gear 325 at one end of a crawler shaft 322 away from the drive wheel 323, the two crawler assemblies 32 are meshed through the second gears 325 of the two crawler shafts 322 respectively, so as to achieve synchronous rotation while realizing drive connection.

[0074] It can be understood that a first pulley 326 is further provided on the crawler shaft 322 of one of the two crawler assemblies 32 where the second gear 325 is provided, such that the second gear 325 and the first pulley 326 are coaxially and spaced apart. In this way, when the drive member 2 drives the pulley to drive the transmission belt 21 and the first pulley 326 to rotate, the crawler shaft 322 provided with the first pulley 326 rotates, driving the two second gears 325 of the two crawler assemblies 32 to mesh and rotate, realizing synchronous rotation of the two crawler assemblies 32. At the same time, the two crawler shafts 322 of the crawler assembly 32 also achieve synchronous rotation through the first gear 324 and the chain, thereby providing power for the traction channel 32a.

[0075] In this embodiment, by providing two crawler assemblies 32, and providing two crawler shafts 322 on each crawler assembly 32, and through the cooperation of the first gear 324 and the second gear 325, synchronous rotation of the two crawler assemblies 32 and the two crawler shafts 322 of each crawler assembly 32 is achieved, ensuring that the four drive wheels 323 of the two crawler assemblies 32 drive the two crawlers 321 to rotate synchronously at the same time, realizing the transmission and traction of the heat shrinkable tube 7 by the traction channel 32a.

[0076] In one embodiment, as Figure 1 and Figure 2 shown, the mounting seat 31 includes a first mounting seat 311 fixedly provided on the base body 1 and a second mounting seat 312 movably provided on the base body 1. The first mounting seat 311 and the second mounting seat 312 are provided with coaxially arranged mounting holes 313. One crawler assembly 32 is passed through the first mounting seat 311, and the other crawler assembly 32 is passed through the second mounting seat 312.

[0077] It can be understood that by setting the mounting seat 31 as the spaced-apart first mounting seat 311 and second mounting seat 312, and making the first mounting seat 311 fixedly provided on the base body 1 and the second mounting seat 312 movably provided on the base body 1, one crawler assembly 32 is passed through the first mounting seat 311, and the other crawler assembly 32 is passed through the second mounting seat 312, so that the second mounting seat 312 drives one crawler assembly 32 to approach or move away from the other crawler assembly 32 of the first mounting seat 311, thus realizing the adjustment of the size of the traction channel 32a, and adjusting the extrusion deformation amount according to different specifications of the heat shrinkable tube 7 to provide appropriate traction force.

[0078] In one embodiment, as Figure 1 and Figure 2As shown, the traction structure 3 further includes an adjustment assembly 327. The adjustment assembly 327 includes an adjustment member 3271 and a return spring 3274. Among them, the adjustment member 3271 includes an adjustment rod 3272 and a first handwheel 3273 provided at one end of the adjustment rod 3272. The adjustment rod 3272 rotates through two mounting holes 313; the return spring 3274 is sleeved on the adjustment rod 3272, and both ends of the return spring 3274 are elastically abutted against the first mounting seat 311 and the second mounting seat 312 respectively; among them, the first handwheel 3273 drives the adjustment rod 3272 to rotate, so that the second mounting seat 312 approaches or moves away from the first mounting seat 311.

[0079] In this embodiment, by respectively providing coaxially arranged mounting holes 313 on the first mounting seat 311 and the second mounting seat 312, the adjustment rod 3272 of the adjustment member 3271 is sequentially passed through the two mounting holes 313, so that the adjustment rod 3272 is rotationally matched with the two mounting holes 313. In this way, the first handwheel 3273 can be used to drive the adjustment rod 3272 to rotate, so that the second mounting seat 312 approaches or moves away from the first mounting seat 311.

[0080] It can be understood that a bearing structure is provided in the mounting hole 313 of the first mounting seat 311, so that the adjustment rod 3272 is rotatably connected to the first mounting seat 311 through the bearing structure. The mounting hole 313 of the second mounting seat 312 is provided with a thread, and the outer wall of the adjustment rod 3272 is provided with an external thread, so as to realize the rotational connection by using the external thread of the adjustment rod 3272 and the thread in the mounting hole 313 of the second mounting seat 312.

[0081] In order to prevent the second mounting seat 312 from driving one crawler assembly 32 to approach another crawler assembly 32 too forcefully or rigidly during the rotation of the adjustment rod 3272, so that the force of the traction channel 32a formed by the cooperation of the two crawlers 321 is too large and the heat shrinkable tube 7 is flattened, a return spring 3274 is sleeved on the adjustment rod 3272, so that the return spring 3274 is located between the first mounting seat 311 and the second mounting seat 312 and is elastically abutted against the first mounting seat 311 and the second mounting seat 312, so as to realize the reset buffer by using the return spring 3274. In this way, by adjusting the gap (traction channel 32a) between the two crawlers 321, the traction structure 3 can adjust the extrusion deformation amount according to different specifications of the heat shrinkable tube 7 to provide appropriate traction force, improving the versatility and convenience.

[0082] In one embodiment, as Figure 1 and Figure 2As shown, the second mounting seat 312 is provided with a sliding groove 314, and the base body 1 is provided with a sliding rail 13. The sliding groove 314 is in sliding fit with the sliding rail 13. It can be understood that by providing the sliding rail 13 on the bottom plate 11 of the base body 1 and the sliding groove 314 on the second mounting seat 312, the sliding fit between the sliding groove 314 and the sliding rail 13 is utilized to realize sliding guidance for the movement of the second mounting seat 312.

[0083] It can be understood that when the first handwheel 3273 drives the adjusting rod 3272 to rotate so as to adjust the gap (traction channel 32a) between the two crawlers 321, the two second gears 325 of the two crawler assemblies 32 can still be meshed and driven. That is, when the gap between the two crawlers 321 is finely adjusted within a certain range, the center distance of the two second gears 325 can still ensure stable meshing of the two second gears 325 within this range of change.

[0084] In one embodiment, as Figure 1 and Figure 3 shown, the auxiliary traction assembly 4 includes a fixed seat 41, two auxiliary shafts 42 and a second protective cover 46. Among them, the fixed seat 41 is provided on the base body 1; the two auxiliary shafts 42 are spaced apart and parallelly penetrate through the fixed seat 41. One end of each of the two auxiliary shafts 42 is provided with an auxiliary traction wheel 43, and the other end of each of the two auxiliary shafts 42 is provided with a third gear 44. The two third gears 44 are meshed and connected. One end of an auxiliary shaft 42 away from the auxiliary traction wheel 43 is provided with a second belt pulley 45. The second belt pulley 45 is spaced apart from the third gear 44 and is connected to the driving member 2 through a transmission belt 21. The two auxiliary traction wheels 43 are oppositely arranged and cooperate to form an auxiliary traction channel 4a; the second protective cover 46 is provided with a second cavity 461 and a second notch 462 communicating with the second cavity 461. The two auxiliary traction wheels 43 are accommodated in the second cavity 461 and partially exposed from the second notch 462. The auxiliary traction channel 4a is correspondingly communicated with the second notch 462.

[0085] In this embodiment, the fixed seat 41 is used to install, support and fix the two auxiliary shafts 42 and the second protective cover 46. The structure of the fixed seat 41 can be a structure such as a mounting plate, a mounting shell, a mounting table or a mounting frame, etc., which is not limited herein. It can be understood that the fixed seat 41 can be provided on the bottom plate 11 and / or the protective cover 12 of the base body 1 by welding or integral molding, so as to improve the installation stability.

[0086] It can be understood that the two auxiliary shafts 42 can be rotatably passed through the fixed seat 41 through bearing structures respectively. The two auxiliary shafts 42 are arranged at intervals and in parallel. One end of each auxiliary shaft 42 is provided with an auxiliary traction wheel 43, so that the two auxiliary traction wheels 43 of the two auxiliary shafts 42 are arranged oppositely and cooperate to form an auxiliary traction channel 4a. In order to enable the two auxiliary shafts 42 to drive the two auxiliary traction wheels 43 to rotate synchronously, one end of each auxiliary shaft 42 away from the auxiliary traction wheel 43 is in transmission connection, for example, structures such as transmission belts, chains, and gear meshing are used to achieve mutual transmission connection.

[0087] In this embodiment, one end of each auxiliary shaft 42 away from the auxiliary traction wheel 43 is provided with a third gear 44, that is, the third gear 44 and the auxiliary traction wheel 43 are located on opposite sides of the fixed seat 41, and the two third gears 44 of the two auxiliary shafts 42 are meshed and connected.

[0088] In order to facilitate the driving member 2 to drive the two auxiliary shafts 42 to rotate, one end of an auxiliary shaft 42 away from the auxiliary traction wheel 43 is provided with a second pulley 45. The second pulley 45 is arranged at intervals with the third gear 44 and is in transmission connection with the driving member 2 through a transmission belt 21. It can be understood that the output shaft of the driving member 2 is provided with a pulley, so that the transmission belt 21 is sleeved on the pulley of the driving member 2 and the second pulley 45 of an auxiliary shaft 42, so that the driving member 2 drives the pulley to drive the transmission belt 21 and the second pulley 45 to rotate, so that the auxiliary shaft 42 provided with the second pulley 45 rotates, and then drives the other auxiliary shaft 42 to rotate synchronously through the meshing connection of the two third gears 44, so as to provide power for the auxiliary traction channel 4a.

[0089] It can be understood that the second protective cover 46 is used to protect the two auxiliary traction wheels 43 and the auxiliary traction channel 4a. In this embodiment, the second protective cover 46 is in the structure of a shell or a box or a cover, that is, the second protective cover 46 has a second cavity 461. In order to facilitate the heat shrinkable tube 7 in the auxiliary traction channel 4a to be wound up, the second protective cover 46 is provided with a second notch 462 communicating with the second cavity 461, so that part of the auxiliary traction wheel 43 is exposed in the second notch 462, and the auxiliary traction channel 4a is correspondingly communicated with the second notch 462.

[0090] In one embodiment, as Figure 1 and Figure 3 shown, the fixed seat 41 includes a fixed main body 411 and a sliding plate 412 provided on the base body 1. The fixed main body 411 is provided with a movable groove 413. The sliding plate 412 is slidably connected in the movable groove 413. One auxiliary shaft 42 is passed through the fixed main body 411, and the other auxiliary shaft 42 is passed through the sliding plate 412.

[0091] It can be understood that by setting the fixed seat 41 as the fixed main body 411 and the sliding plate 412, the fixed main body 411 is fixed on the base body 1. By providing an activity groove 413 in the fixed main body 411 and slidably connecting the sliding plate 412 in the activity groove 413, an auxiliary shaft 42 is passed through the fixed main body 411, and another auxiliary shaft 42 is passed through the sliding plate 412. Thus, the sliding plate 412 drives an auxiliary shaft 42 to slide or move relative to the fixed main body 411 to approach or move away from another auxiliary shaft 42, so as to realize the size adjustment of the auxiliary traction channel 4a, and thus adjust the extrusion deformation amount according to heat shrinkable tubes 7 of different specifications to provide appropriate traction force.

[0092] In one embodiment, as Figure 1 and Figure 3 shown, the auxiliary traction assembly 4 further includes a mounting plate 471 and an adjusting screw 473. The mounting plate 471 is provided at the notch of the activity groove 413, and the mounting plate 471 is provided with an adjusting hole 472 communicating with the activity groove 413; the adjusting screw 473 is rotatably passed through the adjusting hole 472, and one end of the adjusting screw 473 extending into the activity groove 413 is rotatably connected to the sliding plate 412, and the other end of the adjusting screw 473 is provided with a second handwheel 474; wherein, the second handwheel 474 drives the adjusting screw 473 to rotate, so that the sliding plate 412 approaches or moves away from the mounting plate 471.

[0093] In this embodiment, the mounting plate 471 can be fixed on the fixed main body 411 by welding or integral molding structure and is located at the notch of the activity groove 413. Of course, in other embodiments, the mounting plate 471 can also be provided on the fixed main body 411 by means of snap connection, plug-in fit, screw connection or pin connection, etc., which can improve the disassembly and assembly convenience and is not limited herein.

[0094] It can be understood that the mounting plate 471 is provided with an adjusting hole 472 communicating with the activity groove 413. Threads can be provided in the adjusting hole 472, and external threads are provided on the outer wall of the adjusting screw 473. Thus, by using the cooperation of the external threads and the threads in the adjusting hole 472, the adjusting screw 473 is rotatably passed through the adjusting hole 472. One end of the adjusting screw 473 passes through the adjusting hole 472 and extends into the activity groove 413 and is rotatably connected to the sliding plate 412. A second handwheel 474 is provided at the end of the adjusting screw 473 away from the sliding plate 412. In this way, the second handwheel 474 can be used to drive the adjusting screw 473 to rotate, so that the sliding plate 412 drives an auxiliary shaft 42 to approach or move away from another auxiliary shaft 42, thereby realizing the size adjustment of the auxiliary traction channel 4a.

[0095] Of course, in other embodiments, an adjusting cylinder or other adjusting structure may also be used to connect to the sliding plate 412 to achieve the adjustment of the size of the auxiliary traction channel 4a, which is not limited herein. It can be understood that the inner wall of the movable slot 413 is provided with a slide rail, and the sliding plate 412 is provided with a chute that slidably cooperates with the slide rail.

[0096] In this embodiment, by providing the auxiliary traction assembly 4, the expanded heat shrinkable tube 7 is led out to the outside from the traction channel 32a of the traction structure 3 by using the auxiliary traction assembly 4 for subsequent storage. The output linear velocity of the auxiliary traction assembly 4 is slightly larger than the linear velocity of the traction structure 3, which can ensure that the heat shrinkable tube 7 is always in a taut state between the traction channel 32a and the auxiliary traction channel 4a. The auxiliary traction assembly 4 adjusts the gap (auxiliary traction channel 4a) between the two auxiliary traction wheels 43 through the adjusting screw 473. By adjusting the gap, slight slippage is generated between the heat shrinkable tube 7 and the two auxiliary traction wheels 43, which can not only ensure that the led-out heat shrinkable tube 7 always maintains a taut state, but also avoid stretching deformation of the heat shrinkable tube 7. At the same time, the extrusion deformation of the heat shrinkable tube 7 is small, which also ensures good circulation of the compressed gas inside the heat shrinkable tube 7.

[0097] It can be understood that when the second handwheel 474 drives the adjusting screw 473 to rotate to adjust the gap (auxiliary traction channel 4a) between the two auxiliary traction wheels 43, the two third gears 44 of the two auxiliary shafts 42 can still mesh and drive, that is, when the gap between the two auxiliary traction wheels 43 is finely adjusted within a certain range, the center distance of the third gears 44 can still ensure stable meshing of the two third gears 44 within this range.

[0098] In one embodiment, as Figure 1 shown, the traction device 100 further includes a limiting assembly 5, and the limiting assembly 5 is provided on the base 1 and is located between the traction structure 3 and the auxiliary traction assembly 4. Among them, the limiting assembly 5 includes a fixing plate 51 and two limiting rods 52. One end of the fixing plate 51 is connected to the base 1; the two limiting rods 52 are provided at the end of the fixing plate 51 away from the base 1. The two limiting rods 52 are arranged in parallel and at intervals, and cooperate to form a limiting groove 53 for accommodating the limiting heat shrinkable tube 7. The limiting groove 53 is located on the same straight line as one end of the traction channel 32a and the auxiliary traction channel 4a.

[0099] It can be understood that by providing the limiting assembly 5 between the traction structure 3 and the auxiliary traction assembly 4, the limiting groove 53 of the limiting assembly 5 is located on the same straight line as one end of the traction channel 32a and the auxiliary traction channel 4a, so as to use the limiting groove 53 of the limiting assembly 5 to guide and limit the heat shrinkable tube 7 located between the traction channel 32a and the auxiliary traction channel 4a, thereby ensuring that the heat shrinkable tube 7 does not slip off from the traction channel 32a and / or the auxiliary traction channel during the traction process, resulting in defective products.

[0100] In this embodiment, the fixing plate 51 can be in a plate-like or rod-like structure, which is not limited herein. The fixing plate 51 is used to support, fix and install two limiting rods 52. The limiting rods 52 can be in a plate-like or rod-like structure. The two limiting rods 52 are arranged in parallel and at intervals on the fixing plate 51 and cooperate to form a limiting groove 53.

[0101] It can be understood that one of the two limiting rods 52 is fixedly connected to the fixing plate 51, and the other limiting rod 52 is movably connected to the fixing plate 51, so as to adjust the distance between the two limiting rods 52 to adjust the size of the limiting groove 53, thereby ensuring that the limiting groove 53 can be applicable to heat shrinkable tubes 7 of different sizes, improving the versatility and convenience of use.

[0102] In this embodiment, a strip-shaped hole is provided on the fixing plate 51. One limiting rod 52 passes through the strip-shaped hole and can move along the strip-shaped hole to realize the adjustable distance between the two limiting rods 52, which is not limited herein.

[0103] The limiting component 5 of this embodiment is used to limit the conveying position of the heat shrinkable tube 7 through the limiting groove 53, ensure that the heat shrinkable tube 7 is transmitted on the central plane of the traction channel 32a or the auxiliary traction channel 4a, and prevent the heat shrinkable tube 7 from running off track.

[0104] In one embodiment, as Figure 1 and Figure 4 shown, the traction device 100 further includes a tensioning component 6. The tensioning component 6 is arranged between the traction structure 3 and / or the auxiliary traction component 4 and the driving part 2. The tensioning component 6 includes a limiting plate 61, a roller shaft 62, a roller 63 and a screw 64. Among them, the limiting plate 61 is arranged on the base body 1, and the limiting plate 61 is provided with a strip-shaped hole 611; one end of the roller shaft 62 passes through the strip-shaped hole 611, and a threaded hole is provided at the end of the roller shaft 62 extending into the strip-shaped hole 611; the roller 63 is rotatably sleeved on the roller shaft 62 and abuts against the transmission belt 21; one end of the screw 64 passes through the base body 1 and the limiting plate 61 and extends into the strip-shaped hole 611 and is arranged in the threaded hole; among them, the screw 64 rotates to make the roller shaft 62 move along the strip-shaped hole 611.

[0105] In this embodiment, the limiting plate 61 is used to support, install and fix the roller shaft 62, the roller 63 and the screw 64. The structure of the limiting plate 61 can be a plate-like structure, an installation table, an installation frame or an installation seat, etc., which is not limited herein. It can be understood that the limiting plate 61 can be arranged on the bottom plate 11 of the base body 1 by welding or integral molding, so as to improve the installation stability. Of course, in other embodiments, the limiting plate 61 can also be arranged on the bottom plate 11 of the base body 1 by detachable methods such as snap connection, plug-in fit, screw connection or pin connection, so as to improve the disassembly and assembly convenience of the tensioning component 6.

[0106] It can be understood that by providing a strip-shaped hole 611 on the limit plate 61, the strip-shaped hole 611 is arranged to extend along the length direction of the limit plate 61, so that the roller shaft 62 is inserted into the strip-shaped hole 611, facilitating the movement of the roller shaft 62 along the strip-shaped hole 611, thereby realizing the adjustable position of the roller shaft 62. In this embodiment, the roller 63 is rotatably sleeved on the roller shaft 62 through a bearing structure. By using the roller 63 to abut against the transmission belt 21, the roller 63 can press or tension the transmission belt 21 by adjusting the position of the roller shaft 62, ensuring good transmission of the driving member 2.

[0107] In this embodiment, by providing a screw rod 64 and providing a threaded hole at one end of the roller shaft 62 extending into the strip-shaped hole 611, one end of the screw rod 64 penetrates through the base body 1 and the limit plate 61 and extends into the strip-shaped hole 611 and is inserted into the threaded hole. Thus, by rotating the screw rod 64, the roller shaft 62 can move along the strip-shaped hole 611, realizing the adjustable position of the roller shaft 62. Of course, in other embodiments, the screw rod 64 can also be replaced with an adjusting cylinder or other adjusting structures, which is not limited herein.

[0108] The traction device 100 of the present invention is provided with a traction structure 3. By means of the traction structure 3, the heat-shrinkable tube 7 is evenly and stably drawn out from the expansion die 8. The crawler 321 type structure is adopted, which can ensure that sufficient traction force is provided to the heat-shrinkable tube 7 under a small extrusion deformation. The crawler 321 adjusts the gap, and adjusts the extrusion deformation amount according to heat-shrinkable tubes 7 of different specifications to provide appropriate traction force. By providing an auxiliary traction assembly 4, the expanded heat-shrinkable tube 7 is drawn out from the inside of the traction structure 3 to the outside for subsequent storage. The output linear velocity of the auxiliary traction assembly 4 is slightly larger than the linear velocity of the traction structure 3, which can ensure that the heat-shrinkable tube 7 is always in a taut state between the traction channel 32a and the auxiliary traction channel 4a. The gap between the two auxiliary traction wheels 43 of the auxiliary traction assembly 4 is adjustable. By adjusting the gap, slight slippage is generated between the heat-shrinkable tube 7 and the two auxiliary traction wheels 43. In this way, it can not only ensure that the drawn heat-shrinkable tube 7 always maintains a taut state, but also avoid stretching deformation of the heat-shrinkable tube 7. At the same time, the extrusion deformation of the tube is small, which also ensures good circulation of the compressed gas inside the heat-shrinkable tube 7. By using a transmission belt 21 to drive the output shaft of the driving member 2 to be connected to the traction structure 3 and the auxiliary traction assembly 4 simultaneously, it is ensured that stable power is provided to the traction structure 3 and the auxiliary traction assembly 4. The setting of the limiting assembly 5 uses the limiting groove 53 to limit the conveying position of the heat-shrinkable tube 7, ensuring that the heat-shrinkable tube 7 is transmitted on the central plane of the traction channel 32a and / or the auxiliary traction channel 4a, preventing the heat-shrinkable tube 7 from running off. It can be understood that by providing a tensioning assembly 6, the cooperation of the roller shaft 62 with the strip-shaped hole 611 and the screw 64 on the limiting plate 61 is utilized, so that the roller shaft 62 drives the roller 63 to press or tension the transmission belt 21 between the output shaft of the driving member 2 and the traction structure 3 and / or the transmission belt 21 between the output shaft of the driving member 2 and the auxiliary traction assembly 4, ensuring smooth transmission.

[0109] The present invention also proposes a processing device, which includes an expansion die 8 and a traction device 100. The expansion die 8 is disposed opposite to the traction channel 32a of the traction device 100. The specific structure of the traction device 100 refers to the foregoing embodiments. Since this processing device uses all the technical solutions of the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated herein one by one.

[0110] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A traction device for traction of the expanded heat shrink tube. It is characterized in that The traction device comprises: matrix; A driving member, wherein the driving member is disposed on the base; A traction structure, which is disposed on the base and is drivingly connected to the driving member, and the traction structure is provided with a traction channel for traction of the heat shrink tube; and An auxiliary traction component, the auxiliary traction component is arranged on the base and is drivingly connected to the driving member, the auxiliary traction component is provided with an auxiliary traction channel for traction of the heat shrink tube, and the auxiliary traction channel is spaced apart and arranged in parallel with the traction channel; The outlet speed of the auxiliary traction channel is greater than the outlet speed of the traction structure; The auxiliary traction assembly comprises: A fixing seat, the fixing seat being arranged on the base; Two auxiliary shafts, the two auxiliary shafts are arranged at intervals and in parallel on the fixed seat, one end of the two auxiliary shafts is provided with an auxiliary traction wheel, the other end of the two auxiliary shafts is provided with a third gear, the two third gears are meshingly connected, and one end of the auxiliary shaft away from the auxiliary traction wheel is provided with a second pulley, the second pulley is arranged at intervals from the third gear, and is connected to the driving member through a transmission belt, the two auxiliary traction wheels are arranged opposite to each other, and cooperate to form the auxiliary traction channel.

2. The traction device according to claim 1, It is characterized in that The traction structure comprises: A mounting seat, the mounting seat being arranged on the base; Two crawler assemblies, the two crawler assemblies are arranged in parallel and at intervals on the mounting seat, one end of the two crawler assemblies is provided with a crawler, the other ends of the two crawler assemblies are transmission-connected, one end of the crawler assembly away from the crawler is provided with a first pulley, the first pulley is transmission-connected to the driving member through a transmission belt, the two crawlers are arranged opposite to each other, and cooperate to form the traction channel; and The first protective cover is provided with a first cavity and a first notch communicating with the first cavity, the crawler belt is accommodated in the first cavity and partially exposed in the first notch, and the traction channel is correspondingly communicated with the first notch.

3. The traction device according to claim 2, It is characterized in that Each of the track assemblies comprises: Two crawler shafts, the two crawler shafts are spaced apart and arranged in parallel on the mounting seat; Two traction wheels, each of which is arranged at one end of a track shaft, and the track is sleeved on the two traction wheels; Two first gears, each of which is disposed at one end of the track shaft away from the traction wheel, and the two first gears are connected by a chain transmission; and A second gear, the second gear is arranged at one end of the track shaft away from the traction wheel, and the second gear is spaced apart from the first gear; Wherein, the second gear of one track assembly is meshed with the second gear of another track assembly.

4. The traction device according to claim 2, It is characterized in that The mounting base includes a first mounting base fixedly provided on the base body and a second mounting base movably provided on the base body. The first mounting base and the second mounting base are provided with coaxially arranged mounting holes. One crawler assembly is inserted through the first mounting base, and the other crawler assembly is inserted through the second mounting base; The traction structure further includes an adjusting assembly, and the adjusting assembly includes: An adjusting member, the adjusting member includes an adjusting rod and a first handwheel provided at one end of the adjusting rod. The adjusting rod rotatably passes through the two mounting holes; and A return spring, the return spring is sleeved on the adjusting rod, and two ends of the return spring are elastically abutted against the first mounting base and the second mounting base respectively; Wherein, the first handwheel drives the adjusting rod to rotate, so that the second mounting base approaches or moves away from the first mounting base.

5. The traction device according to claim 4, wherein, The second mounting base is provided with a sliding groove, and the base body is provided with a sliding rail. The sliding groove is in sliding fit with the sliding rail.

6. The traction device according to claim 1, wherein, The auxiliary traction assembly includes: A second protective cover, the second protective cover is provided with a second accommodating cavity and a second notch communicating with the second accommodating cavity. The two auxiliary traction wheels are accommodated in the second accommodating cavity and partially exposed at the second notch. The auxiliary traction channel corresponds to and communicates with the second notch.

7. The traction device according to claim 6, wherein, The fixed seat includes a fixed main body provided on the base body and a sliding plate. The fixed main body is provided with a movable groove, and the sliding plate is slidably connected in the movable groove. One auxiliary shaft is inserted through the fixed main body, and the other auxiliary shaft is inserted through the sliding plate; The auxiliary traction assembly further includes: A mounting plate, the mounting plate is provided at the notch of the movable groove, and the mounting plate is provided with an adjusting hole communicating with the movable groove; and An adjusting screw, the adjusting screw rotatably passes through the adjusting hole, and one end of the adjusting screw extending into the movable groove is rotatably connected to the sliding plate, and the other end of the adjusting screw is provided with a second handwheel; Wherein, the second handwheel drives the adjusting screw to rotate, so that the sliding plate approaches or moves away from the mounting plate.

8. The traction device according to claim 1, wherein, The traction device further includes a limiting assembly, and the limiting assembly is provided on the base body and is located between the traction structure and the auxiliary traction assembly; The limiting assembly includes: A fixing plate, one end of the fixing plate is connected to the base body; and Two limiting rods, the two limiting rods are provided at the end of the fixing plate away from the base body. The two limiting rods are parallel and spaced apart, and cooperate to form a limiting groove for accommodating a limiting heat shrinkable tube. The limiting groove and one ends of the traction channel and the auxiliary traction channel are located on the same straight line.

9. The traction device according to any one of claims 1 to 7, wherein, The traction device further includes a tensioning assembly, and the tensioning assembly is provided between the traction structure and / or the auxiliary traction assembly and the driving member. The tensioning assembly includes: A limiting plate, the limiting plate is arranged on the base body, and the limiting plate is provided with a strip-shaped hole; A roller shaft, one end of the roller shaft is inserted into the strip-shaped hole, and a threaded hole is arranged at the end of the roller shaft extending into the strip-shaped hole; A roller, the roller is rotatably sleeved on the roller shaft and abuts against the transmission belt; and A screw rod, one end of the screw rod penetrates through the base body and the limiting plate and extends into the strip-shaped hole, and is inserted into the threaded hole; Wherein, the screw rod is rotatable to enable the roller shaft to move along the strip-shaped hole.

10. A processing device, characterized in that it includes an expansion die and the traction device according to any one of claims 1 to 9, and the expansion die is arranged opposite to the traction channel of the traction device.

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