阅读说明：本技术 牵引装置和加工设备 (Draw gear and processing equipment ) 是由 汪家伟 张维波 崔晓明 魏任升 欧美秀 于 2020-11-20 设计创作，主要内容包括：本发明公开一种牵引装置和加工设备,该牵引装置包括基体、驱动件、牵引结构及辅助牵引组件,驱动件设于基体；牵引结构设于基体,并与驱动件传动连接,牵引结构设有用于牵引热缩管的牵引通道；辅助牵引组件设于基体,并与驱动件传动连接,辅助牵引组件设有用于牵引热缩管的辅助牵引通道,辅助牵引通道与牵引通道呈间隔且并行设置。本发明的牵引装置能够保证热缩管在扩张时出模具后有一个稳定持续的牵引力,使扩张稳定进行,减少不良品。(The invention discloses a traction device and processing equipment, wherein the traction device comprises a base body, a driving piece, a traction structure and an auxiliary traction assembly, wherein the driving piece is arranged on the base body; the traction structure is arranged on the base body and is in transmission connection with the driving piece, and the traction structure is provided with a traction channel for traction of the heat shrinkable tube; the auxiliary traction assembly is arranged on the base body and is in transmission connection with the driving piece, the auxiliary traction assembly is provided with an auxiliary traction channel for traction of the heat shrinkable tube, and the auxiliary traction channel and the traction channel are arranged at intervals and in parallel. The traction device can ensure that the heat shrinkable tube has stable and continuous traction force after being discharged from the die during expansion, so that the expansion is stably carried out, and defective products are reduced.)

1. A traction apparatus for pulling an expanded heat shrinkable tube, comprising:

a substrate;

the driving piece is arranged on the base body;

the traction structure is arranged on the base body and is in transmission connection with the driving piece, and the traction structure is provided with a traction channel for traction of the heat shrink tube; and

the auxiliary traction assembly is arranged on the base body and is in transmission connection with the driving piece, an auxiliary traction channel for traction of the heat shrinkage pipe is arranged on the auxiliary traction assembly, and the auxiliary traction channel and the traction channel are arranged at intervals and in parallel.

2. The towing attachment of claim 1, wherein the towing attachment includes:

the mounting seat is arranged on the base body;

the two crawler assemblies penetrate through the mounting seat at intervals in parallel, one ends of the two crawler assemblies are provided with crawlers, the other ends of the two crawler assemblies are in transmission connection, one end, far away from the crawlers, of one crawler assembly is provided with a first belt wheel, the first belt wheel is in transmission connection with the driving piece through a transmission belt, and the two crawlers are oppositely arranged and matched to form the traction channel; and

the crawler belt comprises a first protection cover, the first protection cover is provided with a first containing cavity and a first notch communicated with the first containing cavity, the crawler belt is contained in the first containing cavity, part of the crawler belt is exposed out of the first notch, and the traction channel is correspondingly communicated with the first notch.

3. The traction device recited in claim 2, wherein each of the track assemblies includes:

the two crawler shafts penetrate through the mounting seat at intervals in parallel;

each traction wheel is arranged at one end of one crawler belt shaft, and the crawler belts are sleeved on the two traction wheels;

each first gear is arranged at one end, far away from the traction wheel, of one track shaft, and the two first gears are in transmission connection through a chain; and

the second gear is arranged at one end, far away from the traction wheel, of the track shaft, and the second gear and the first gear are arranged at intervals;

wherein the second gear of one of the track assemblies is in mesh with the second gear of the other track assembly.

4. The towing apparatus as claimed in claim 2, wherein the mounting seat comprises a first mounting seat fixedly arranged on the base body and a second mounting seat movably arranged on the base body, the first mounting seat and the second mounting seat are provided with mounting holes coaxially arranged, one of the track assemblies is arranged through the first mounting seat, and the other track assembly is arranged through the second mounting seat;

the towing construction further comprises an adjustment assembly comprising:

the adjusting piece comprises an adjusting rod and a first hand wheel arranged at one end of the adjusting rod, and the adjusting rod penetrates through the two mounting holes in a rotating mode; and

the reset spring is sleeved on the adjusting rod, and two ends of the reset spring are respectively elastically abutted against the first mounting seat and the second mounting seat;

the first hand wheel drives the adjusting rod to rotate, so that the second mounting base is close to or far away from the first mounting base.

5. The draft gear according to claim 4, wherein said second mounting block is provided with a slide track and said base is provided with a slide track, said slide track slidably engaging said slide track.

6. The towing attachment in accordance with claim 1 wherein the auxiliary tow assembly includes:

the fixed seat is arranged on the base body;

the two auxiliary shafts are arranged at intervals 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 one auxiliary shaft, which is far away from the auxiliary traction wheels, is provided with a second belt wheel, the second belt wheel and the third gears are arranged at intervals and are in transmission connection with the driving piece through a transmission belt, and the two auxiliary traction wheels are oppositely arranged and are matched to form an auxiliary traction channel; and

the auxiliary traction wheels are contained in the second containing cavity, the auxiliary traction wheels are partially exposed out of the second notch, and the auxiliary traction channel is correspondingly communicated with the second notch.

7. The draft gear according to claim 6, wherein said fixed base includes a fixed body provided to said base and a sliding plate, said fixed body having a movable slot, said sliding plate being slidably connected to said movable slot, one of said auxiliary shafts being inserted through said fixed body and the other of said auxiliary shafts being inserted through said sliding plate;

the auxiliary traction assembly further comprises:

the mounting plate is arranged at the notch of the movable groove and is provided with an adjusting hole communicated with the movable groove; and

the adjusting screw rod is rotatably arranged in the adjusting hole in a penetrating mode, one end, extending into the movable groove, of the adjusting screw rod is rotatably connected with the sliding plate, and a second hand wheel is arranged at the other end of the adjusting screw rod;

and the second hand wheel drives the adjusting screw rod to rotate so as to enable the sliding plate to approach or separate from the mounting plate.

8. The towing attachment in accordance with claim 1 wherein the towing attachment further includes a stop assembly disposed on the base and between the towing construction and the auxiliary towing assembly;

the spacing subassembly includes:

one end of the fixing plate is connected with the base body; and

the two limiting rods are arranged at one end, far away from the base body, of the fixing plate, arranged in parallel and spaced, and matched to form a limiting groove used for containing a limiting heat-shrinkable tube, and the limiting groove and one ends of the traction channel and the auxiliary traction channel are located on the same straight line.

9. A towing attachment in accordance with any one of claims 1 to 7, characterised in that the towing attachment further includes a tensioning assembly provided between the towing construction and/or the auxiliary towing assembly and the drive member, the tensioning assembly including:

the limiting plate is arranged on the substrate and provided with a strip-shaped hole;

one end of the roller shaft penetrates through the strip-shaped hole, and a screw hole is formed in one end, extending into the strip-shaped hole, of the roller shaft;

the roller is rotatably sleeved on the roller shaft and is abutted against the transmission belt; and

one end of the screw rod penetrates through the base body and the limiting plate, extends into the strip-shaped hole and is arranged in the screw hole in a penetrating mode;

wherein, the screw rod can rotate, so that the roller shaft moves along the strip-shaped hole.

10. A processing apparatus comprising an expansion die and a pulling device as claimed in any one of claims 1 to 9, the expansion die being disposed opposite a pulling channel of the pulling device.

Technical Field

The invention relates to the technical field of heat shrink tube processing equipment, in particular to a traction device and processing equipment applying the traction device.

Background

In the course of heat-shrinkable tube's processing, after the expansion production demolding, need for a continuous stable traction force for heat-shrinkable tube, in the correlation technique, generally adopt a set of to pressing rubber coating wheel centre gripping heat-shrinkable tube and pull the output in succession, and to pressing rubber coating wheel centre gripping heat-shrinkable tube, need to flatten heat-shrinkable tube clamp to certain extent just can transmit traction force to heat-shrinkable tube, heat-shrinkable tube clamp is flat to warp greatly, can influence intraductal compressed gas's circulation, and then influence going on of expansion, heat-shrinkable tube clamp is flat to warp for a short time, clamping-force is not enough, easily produce and skid, cause and pull the unstability, these all can lead to the heat-shrinkable tube to produce defective products or crash.

Disclosure of Invention

The invention mainly aims to provide a traction device and processing equipment, and aims to provide the traction device which can stably clamp and traction-output an expanded heat-shrinkable tube, avoid expansion instability caused by too loose and slippery clamping force or too tight blockage of gas flow in the tube and further cause dead halt.

In order to achieve the above object, the present invention provides a traction apparatus for drawing an expanded heat shrinkable tube, the traction apparatus comprising:

a substrate;

the driving piece is arranged on the base body;

the traction structure is arranged on the base body and is in transmission connection with the driving piece, and the traction structure is provided with a traction channel for traction of the heat shrink tube; and

the auxiliary traction assembly is arranged on the base body and is in transmission connection with the driving piece, an auxiliary traction channel for traction of the heat shrinkage pipe is arranged on the auxiliary traction assembly, and the auxiliary traction channel and the traction channel are arranged at intervals and in parallel.

In one embodiment, the pulling structure comprises:

the mounting seat is arranged on the base body;

the two crawler assemblies penetrate through the mounting seat at intervals in parallel, one ends of the two crawler assemblies are provided with crawlers, the other ends of the two crawler assemblies are in transmission connection, one end, far away from the crawlers, of one crawler assembly is provided with a first belt wheel, the first belt wheel is in transmission connection with the driving piece through a transmission belt, and the two crawlers are oppositely arranged and matched to form the traction channel; and

the crawler belt comprises a first protection cover, the first protection cover is provided with a first containing cavity and a first notch communicated with the first containing cavity, the crawler belt is contained in the first containing cavity, part of the crawler belt is exposed out of the first notch, and the traction channel is correspondingly communicated with the first notch.

In one embodiment, each of the track assemblies includes:

the two crawler shafts penetrate through the mounting seat at intervals in parallel;

each traction wheel is arranged at one end of one crawler belt shaft, and the crawler belts are sleeved on the two traction wheels;

each first gear is arranged at one end, far away from the traction wheel, of one track shaft, and the two first gears are in transmission connection through a chain; and

the second gear is arranged at one end, far away from the traction wheel, of the track shaft, and the second gear and the first gear are arranged at intervals;

wherein the second gear of one of the track assemblies is in mesh with the second gear of the other track assembly.

In one embodiment, the mounting seat comprises a first mounting seat fixedly arranged on the base body and a second mounting seat movably arranged on the base body, the first mounting seat and the second mounting seat are provided with mounting holes coaxially arranged, one crawler assembly penetrates through the first mounting seat, and the other crawler assembly penetrates through the second mounting seat;

the towing construction further comprises an adjustment assembly comprising:

the adjusting piece comprises an adjusting rod and a first hand wheel arranged at one end of the adjusting rod, and the adjusting rod penetrates through the two mounting holes in a rotating mode; and

the reset spring is sleeved on the adjusting rod, and two ends of the reset spring are respectively elastically abutted against the first mounting seat and the second mounting seat;

the first hand wheel drives the adjusting rod to rotate, so that the second mounting base is close to or far away from the first mounting base.

In an embodiment, the second mounting seat is provided with a sliding groove, and the base body is provided with a sliding rail, wherein the sliding groove is in sliding fit with the sliding rail.

In one embodiment, the auxiliary tow assembly comprises:

the fixed seat is arranged on the base body;

the two auxiliary shafts are arranged at intervals 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 one auxiliary shaft, which is far away from the auxiliary traction wheels, is provided with a second belt wheel, the second belt wheel and the third gears are arranged at intervals and are in transmission connection with the driving piece through a transmission belt, and the two auxiliary traction wheels are oppositely arranged and are matched to form an auxiliary traction channel; and

the auxiliary traction wheels are contained in the second containing cavity, the auxiliary traction wheels are partially exposed out of the second notch, and the auxiliary traction channel is correspondingly communicated with the second notch.

In one embodiment, the fixed base includes a fixed body and a sliding plate, the fixed body is provided with a movable slot, the sliding plate is slidably connected in the movable slot, one of the auxiliary shafts is inserted into the fixed body, and the other auxiliary shaft is inserted into the sliding plate;

the auxiliary traction assembly further comprises:

the mounting plate is arranged at the notch of the movable groove and is provided with an adjusting hole communicated with the movable groove; and

the adjusting screw rod is rotatably arranged in the adjusting hole in a penetrating mode, one end, extending into the movable groove, of the adjusting screw rod is rotatably connected with the sliding plate, and a second hand wheel is arranged at the other end of the adjusting screw rod;

and the second hand wheel drives the adjusting screw rod to rotate so as to enable the sliding plate to approach or separate from the mounting plate.

In one embodiment, the traction device further comprises a limiting assembly, wherein the limiting assembly is arranged on the base body and is positioned between the traction structure and the auxiliary traction assembly;

the spacing subassembly includes:

one end of the fixing plate is connected with the base body; and

the two limiting rods are arranged at one end, far away from the base body, of the fixing plate, arranged in parallel and spaced, and matched to form a limiting groove used for containing a limiting heat-shrinkable tube, and the limiting groove and one ends of the traction channel and the auxiliary traction channel are located on the same straight line.

In an embodiment, the traction device further comprises a tensioning assembly provided between the traction structure and/or the auxiliary traction assembly and the drive member, the tensioning assembly comprising:

the limiting plate is arranged on the substrate and provided with a strip-shaped hole;

one end of the roller shaft penetrates through the strip-shaped hole, and a screw hole is formed in one end, extending into the strip-shaped hole, of the roller shaft;

the roller is rotatably sleeved on the roller shaft and is abutted against the transmission belt; and

one end of the screw rod penetrates through the base body and the limiting plate, extends into the strip-shaped hole and is arranged in the screw hole in a penetrating mode;

wherein, the screw rod can rotate, so that the roller shaft moves along the strip-shaped hole.

The invention also provides processing equipment which comprises an expansion die and the traction device, wherein the expansion die is arranged opposite to the traction channel of the traction device.

According to the traction device, the driving piece, the traction structure and the auxiliary traction assembly are arranged on the base body, the driving piece is used for driving the traction structure and the auxiliary traction assembly to operate simultaneously, and the traction channel of the traction structure and the auxiliary traction channel of the auxiliary traction assembly are used for simultaneously traction the heat shrink tube, so that the heat shrink tube after expansion is stably clamped and output in a traction mode, and the phenomenon that expansion is unstable due to the fact that clamping force is too loose and slipping or gas in the tube is blocked by too tight clamping force to cause crash is avoided. The traction device not only stably clamps and pulls the expanded heat-shrinkable tube for output, avoids the phenomenon that the clamping force is too loose and slips or too tight, so that the expansion is unstable and further the dead halt is caused due to the fact that the gas in the heat-shrinkable tube flows is blocked by the clamping force, but also can ensure that the heat-shrinkable tube has stable and continuous traction force after being taken out of a die during expansion, so that the expansion is stably carried out, and defective products are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a towing attachment in accordance with an embodiment of the present invention;

FIG. 2 is a partially exploded view of a traction structure in accordance with an embodiment of the present invention;

FIG. 3 is a partially exploded schematic view of an auxiliary tow assembly in accordance with an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a tension assembly according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						100	Traction device	326	First pulley	461	Second chamber
1	Base body	327	Adjusting assembly	462	Second gap
						11	Base plate	3271	Adjusting part	471	Mounting plate
12	Protective cover	3272	Adjusting rod	472	Adjusting hole
						13	Sliding rail	3273	First hand wheel	473	Adjusting screw
2	Driving member	3274	Reset spring	474	Second hand wheel
						21	Transmission belt	33	First protective cover	5	Limiting assembly
3	Traction structure	331	A first chamber	51	Fixing plate
						31	Mounting seat	332	First gap	52	Limiting rod
311	First mounting seat	4	Auxiliary traction assembly	53	Limiting groove
						312	Second mounting seat	4a	Auxiliary traction channel	6	Tensioning assembly
313	Mounting hole	41	Fixed seat	61	Limiting plate
						314	Sliding chute	411	Fixing main body	611	Strip-shaped hole
32	Track assembly	412	Movable groove	62	Roller shaft
						32a	Traction channel	413	Sliding plate	63	Roller wheel
321	Caterpillar band	42	Auxiliary shaft	64	Screw rod
						322	Track shaft	43	Auxiliary traction wheel	7	Heat shrink tube
323	Traction wheel	44	Third gear	8	Expansion die
						324	First gear	45	Second belt wheel
325	Second gear	46	Second protective cover

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the course of heat-shrinkable tube's processing, after the expansion production demolding, need for a continuous stable traction force for heat-shrinkable tube, in the correlation technique, generally adopt a set of to pressing rubber coating wheel centre gripping heat-shrinkable tube and pull the output in succession, and to pressing rubber coating wheel centre gripping heat-shrinkable tube, need to flatten heat-shrinkable tube clamp to certain extent just can transmit traction force to heat-shrinkable tube, heat-shrinkable tube clamp is flat to warp greatly, can influence intraductal compressed gas's circulation, and then influence going on of expansion, heat-shrinkable tube clamp is flat to warp for a short time, clamping-force is not enough, easily produce and skid, cause and pull the unstability, these all can lead to the heat-shrinkable tube to produce defective products or crash.

Based on the above concepts and problems, the present invention provides a draft gear 100. It is understood that the pulling device 100 is applied to a heat shrinkable tube 7 processing apparatus for pulling the expanded heat shrinkable tube 7.

Referring to fig. 1, fig. 2 and fig. 3, in an embodiment of the present invention, the traction apparatus 100 includes a base 1, a driving member 2, a traction structure 3 and an auxiliary traction assembly 4, wherein the driving member 2 is disposed on the base 1; the traction structure 3 is arranged on the base body 1 and is in transmission connection with the driving piece 2, and the traction structure 3 is provided with a traction channel 32a for drawing 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 piece 2, the auxiliary traction assembly 4 is provided with an auxiliary traction channel 4a used for traction of the heat shrinkable tube 7, and the auxiliary traction channel 4a and the traction channel 32a are arranged at intervals and in parallel.

In the present embodiment, the base body 1 is used for mounting, supporting and fixing the driving member 2, the traction structure 3, the auxiliary traction assembly 4 and the like, and the structure of the base body 1 may be a support frame, a mounting table, a mounting shell or a housing and the like, which is not limited herein. It can be understood that, as shown in fig. 1, the base body 1 includes a bottom plate 11 and a protective cover 12 disposed on the bottom plate 11, the protective cover 12 and the bottom plate 11 enclose to form a mounting cavity, the driving member 2 is disposed in the mounting cavity, and the traction structure 3 and the auxiliary traction assembly 4 are partially disposed in the mounting cavity, so that the driving member 2, the traction structure 3 and the auxiliary traction assembly 4 are protected by the protective cover 12.

It is understood that the driving member 2 is used for providing a driving force for the traction structure 3 and the auxiliary traction assembly 4, and the driving member 2 may be a driving motor, a servo motor, a driving motor or a speed reducing motor, etc., and is not limited herein.

In this embodiment, the traction structure 3 is used for traction of the heat shrinkable tube 7, and the traction structure 3 may be a traction roller set or the like, and by providing the traction channel 32a, the heat shrinkable tube 7 is clamped and pulled by using the traction channel 32 a. The auxiliary traction assembly 4 is used for traction of the heat shrink tube 7, the auxiliary traction assembly 4 can be of a traction roller set structure and the like, and the heat shrink tube 7 is clamped and dragged by the auxiliary traction passage 4a through the auxiliary traction passage 4 a. It can be understood that, through with supplementary subassembly 4 and the cooperation of pulling structure 3 of pulling to the supplementary passageway 4a that pulls of passageway 32a and supplementary subassembly 4 of pulling that utilizes structure 3 pulls heat shrinkable tube 7 realization simultaneously and pulls, thereby ensures to stabilize the centre gripping and pull the output to heat shrinkable tube 7 after the expansion, avoids the clamping-force too loose to skid or too tight expansion that hinders that the intraductal gas flow causes unstably and then lead to the crash.

According to the traction device 100, the driving piece 2, the traction structure 3 and the auxiliary traction assembly 4 are arranged on the base body 1, the traction structure 3 and the auxiliary traction assembly 4 are driven to operate simultaneously by the driving piece 2, and the heat shrink tube 7 is dragged simultaneously by the traction channel 32a of the traction structure 3 and the auxiliary traction channel 4a of the auxiliary traction assembly 4, so that the expanded heat shrink tube 7 is stably clamped and output in a traction manner, and the phenomenon that the clamping force is too loose and skids or the expansion is unstable due to too tight blockage of gas flowing in the tube, and the dead halt is caused is avoided. The traction device 100 not only stably clamps and pulls and outputs the expanded heat shrinkable tube 7, so that the phenomenon that the expansion is unstable due to too loose and slippery clamping force or too tight clamping force blocking gas flow in the tube to cause dead halt is avoided, but also a stable and continuous traction force is ensured after the heat shrinkable tube 7 is taken out of a mold during expansion, so that the expansion is stably carried out, and defective products are reduced.

In one embodiment, as shown in fig. 1 and 2, the towing structure 3 comprises a mounting seat 31, two track assemblies 32 and a first protection cover 33, wherein the mounting seat 31 is provided on the base 1; the two crawler assemblies 32 are arranged in the mounting seat 31 in a spaced and parallel penetrating manner, one ends of the two crawler assemblies 32 are provided with crawlers 321, the other ends of the two crawler assemblies 32 are in transmission connection, one end of one crawler assembly 32, which is far away from the crawler 321, is provided with a first belt wheel 326, the first belt wheel 326 is in transmission connection with the driving part 2 through a transmission belt 21, and the two crawlers 321 are oppositely arranged and matched to form a traction channel 32 a; the first protection cover 33 is provided with a first cavity 331 and a first notch 332 communicated with the first cavity 331, the track 321 is accommodated in the first cavity 331 and partially exposed from the first notch 332, and the traction passage 32a is correspondingly communicated with the first notch 332.

In the present embodiment, the mounting seat 31 is used for supporting, mounting and fixing the two track assemblies 32 and the first protection cover 33, and the structure of the mounting seat 31 may be a mounting plate, a mounting shell, a mounting table or a mounting rack, which is not limited herein. It will be appreciated that the mounting seat 31 may be welded or integrally formed on the base plate 11 and/or the protective cover 12 of the base 1, thereby improving the mounting stability.

It will be appreciated that two track assemblies 32 are arranged in parallel and spaced apart, two track assemblies 32 are disposed through the mounting block 31, and each track assembly 32 is provided with a track 321 at one end thereof extending through the mounting block 31, such that the two tracks 321 of the two track assemblies 32 are disposed opposite to each other and cooperate to form a traction channel 32 a. In order to enable the two track assemblies 32 to synchronously rotate, so that the traction channel 32a formed by the two tracks 321 can drive the heat shrinkable tube 7 to move, and traction on the heat shrinkable tube 7 is realized, one end of each track assembly 32, which is far away from the track 321, is in transmission connection, for example, the transmission connection is realized by adopting structures such as a transmission belt, a chain, gear engagement, and the like.

In this embodiment, in order to facilitate the driving member 2 to drive the two track assemblies 32 to rotate, one end of one track assembly 32 away from the track 321 is provided with a first pulley 326, and the first pulley 326 is in transmission connection with the driving member 2 through the transmission belt 21. It will be appreciated that the output shaft of the driving member 2 is provided with a pulley, such that the belt 21 is sleeved on the pulley of the driving member 2 and the first pulley 326 of one track assembly 32, such that the driving member 2 drives the pulley to rotate the belt 21 and the first pulley 326, such that the track assembly 32 provided with the first pulley 326 rotates, thereby driving the other track assembly 32 to rotate synchronously, thereby providing power for the traction channel 32 a.

It will be appreciated that the first protective cover 33 serves to protect the track 321 and the traction channel 32 a. In this embodiment, the first protection cover 33 is in a shell or box or cover structure, that is, the first protection cover 33 has a first cavity 331, so that for the convenience that the heat shrinkable tube 7 in the traction passage 32a can be pulled from the first cavity 331 to the auxiliary traction passage 4a, the first protection cover 33 is provided with a first notch 332 communicating with the first cavity 331, so that the track 321 is partially exposed at the first notch 332, and the traction passage 32a is correspondingly communicated with the first notch 332.

In one embodiment, as shown in fig. 1 and 2, each track assembly 32 includes two track shafts 322, two traction wheels 323, two first gears 324 and two second gears 325, wherein the two track shafts 322 are spaced and parallelly disposed through the mounting base 31; each traction wheel 323 is arranged at one end of a crawler belt 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 one track shaft 322 far away from the traction wheel 323, and the two first gears 324 are in transmission connection through a chain; the second gear 325 is arranged at one end of a caterpillar band shaft 322 far away from the traction wheel 323, and the second gear 325 and the first gear 324 are arranged at intervals; wherein the second gear 325 of one track assembly 32 meshes with the second gear 325 of another track assembly 32.

In this embodiment, each track assembly 32 may be provided with one or two track shafts 322, and by providing two track shafts 322, the two track shafts 322 are spaced and parallelly inserted into the mounting seat 31, so as to effectively increase the length of the traction channel 32a, thereby ensuring the traction force of the traction channel 32a on the heat shrinkable tube 7. It will be appreciated that the track shaft 322 may be rotatably mounted to the mount 31 by a bearing arrangement. One end of each track 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 at 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 track shaft 322 and achieve the stress balance.

It will be appreciated that the tracks 321 are mounted on the two traction wheels 323 of each track assembly 32 such that the two tracks 321 of the two track assemblies 32 are disposed opposite to each other to cooperatively form the traction channel 32 a. The two track shafts 322 are configured by sleeving a chain or a transmission belt on the two first gears 324, so as to ensure that the two track shafts 322 rotate synchronously.

In the embodiment, the second gear 325 is arranged at one end of one track shaft 322 far away from the traction wheel 323, so that the two track assemblies 32 are respectively meshed through the second gears 325 of the two track shafts 322, and synchronous rotation is realized while transmission connection is realized.

It will be appreciated that a track shaft 322 of the two track assemblies 32, which is provided with the second gear 325, is further provided with a first pulley 326, such that the second gear 325 is coaxial with and spaced from the first pulley 326, such that the driving pulley of the driving member 2 drives the driving belt 21 and the first pulley 326 to rotate, such that a track shaft 322 of the first pulley 326 rotates, which drives the two second gears 325 of the two track assemblies 32 to rotate in mesh, thereby achieving synchronous rotation of the two track assemblies 32, and such that the two track shafts 322 of the track assemblies 32 are also rotated synchronously via the first gear 324 and the chain, thereby providing power for the traction channel 32 a.

In this embodiment, two track assemblies 32 are provided, two track shafts 322 are provided on each track assembly 32, and the two track assemblies 32 and the two track shafts 322 of each track assembly 32 rotate synchronously through the cooperation of the first gear 324 and the second gear 325, so that the four traction wheels 323 of the two track assemblies 32 simultaneously drive the two tracks 321 to rotate synchronously, and the heat shrinkable tube 7 is conveyed and pulled by the traction channel 32 a.

In an embodiment, as shown in fig. 1 and fig. 2, the mounting seat 31 includes a first mounting seat 311 fixedly disposed on the base 1 and a second mounting seat 312 movably disposed on the base 1, the first mounting seat 311 and the second mounting seat 312 are provided with mounting holes 313 coaxially disposed, one of the track assemblies 32 is disposed through the first mounting seat 311, and the other track assembly 32 is disposed through the second mounting seat 312.

It can be understood that, the first mounting seat 311 and the second mounting seat 312 are arranged at intervals on the mounting seat 31, the first mounting seat 311 is fixedly arranged on the base 1, the second mounting seat 312 is movably arranged on the base 1, one crawler assembly 32 is arranged on the first mounting seat 311 in a penetrating manner, the other crawler assembly 32 is arranged on the second mounting seat 312 in a penetrating manner, so that the second mounting seat 312 drives the other crawler assembly 32 which is close to or far away from the first mounting seat 311, the size of the traction channel 32a is adjusted, and the extrusion deformation amount is adjusted according to the heat shrinkable tubes 7 with different specifications to provide proper traction force.

In one embodiment, as shown in fig. 1 and 2, the towing structure 3 further includes an adjusting assembly 327, the adjusting assembly 327 includes an adjusting part 3271 and a return spring 3274, wherein the adjusting part 3271 includes an adjusting rod 3272 and a first hand wheel 3273 disposed at one end of the adjusting rod 3272, and the adjusting rod 3272 rotates to pass through the two mounting holes 313; the adjusting rod 3272 is sleeved with the return spring 3274, and two ends of the return spring 3274 are elastically abutted to the first mounting seat 311 and the second mounting seat 312 respectively; the first hand wheel 3273 drives the adjusting lever 3272 to rotate, so that the second mounting base 312 is close to or far from the first mounting base 311.

In this embodiment, the first mounting seat 311 and the second mounting seat 312 are respectively provided with the mounting holes 313 coaxially arranged, so that the adjusting rod 3272 of the adjusting member 3271 sequentially penetrates through the two mounting holes 313, the adjusting rod 3272 is rotationally matched with the two mounting holes 313, and thus the first hand wheel 3273 can be used to drive the adjusting rod 3272 to rotate, so that the second mounting seat 312 is close to or far away from the first mounting seat 311.

It can be understood that a bearing structure is arranged in the mounting hole 313 of the first mounting seat 311, so that the adjusting rod 3272 is rotatably connected with the first mounting seat 311 through the bearing structure, a thread is arranged in the mounting hole 313 of the second mounting seat 312, and an external thread is arranged on the outer wall of the adjusting rod 3272, so that the rotation connection is realized by the matching of the external thread of the adjusting rod 3272 and the thread in the mounting hole 313 of the second mounting seat 312.

In order to avoid that the second mounting seat 312 drives one crawler assembly 32 to be close to another crawler assembly 32 in the rotation process of the adjusting rod 3272 is too hard or too rigid, so that the strength of the traction channel 32a formed by matching the two crawlers 321 is too large and the heat shrink tube 7 is flattened, the adjusting rod 3272 is sleeved with a return spring 3274, the return spring 3274 is located between the first mounting seat 311 and the second mounting seat 312 and elastically abuts against the first mounting seat 311 and the second mounting seat 312, so that the return buffering is realized by the return spring 3274, and thus, by adjusting the gap (the traction channel 32a) between the two crawlers 321, the traction structure 3 can adjust the extrusion deformation amount according to the heat shrink tubes 7 with different specifications to provide proper traction force, and the universality and the convenience are improved.

In one embodiment, as shown in fig. 1 and 2, the second mounting seat 312 is provided with a sliding groove 314, the base 1 is provided with a sliding rail 13, and the sliding groove 314 is slidably engaged with the sliding rail 13. It can be understood that, by providing the slide rail 13 on the bottom plate 11 of the base body 1 and providing the slide groove 314 on the second mounting seat 312, the sliding guide for the movement of the second mounting seat 312 is realized by the sliding fit of the slide groove 314 and the slide rail 13.

It can be understood that when the first hand wheel 3273 drives the adjusting rod 3272 to rotate, so as to adjust the gap (the traction channel 32a) between the two tracks 321, the two second gears 325 of the two track assemblies 32 can still be in meshing transmission, that is, the gap between the two tracks 321 is finely adjusted within a certain range, and the change of the center distance of the second gears 325 within this range can still ensure that the two second gears 325 can be stably meshed.

In an embodiment, as shown in fig. 1 and 3, the auxiliary traction assembly 4 includes a fixing base 41, two auxiliary shafts 42, and a second protection cover 46, wherein the fixing base 41 is disposed on the base 1; two auxiliary shafts 42 are arranged at intervals and parallelly penetrate through the fixed seat 41, one ends of the two auxiliary shafts 42 are provided with auxiliary traction wheels 43, the other ends of the two auxiliary shafts 42 are provided with third gears 44, the two third gears 44 are meshed and connected, one end of one auxiliary shaft 42, which is far away from the auxiliary traction wheels 43, is provided with a second belt wheel 45, the second belt wheel 45 and the third gear 44 are arranged at intervals and are in transmission connection with the driving part 2 through a transmission belt 21, and the two auxiliary traction wheels 43 are oppositely arranged and are matched to form an auxiliary traction channel 4 a; the second protection cover 46 is provided with a second cavity 461 and a second gap 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 gap 462, and the auxiliary traction passage 4a is correspondingly communicated with the second gap 462.

In this embodiment, the fixing base 41 is used for mounting, supporting and fixing the two auxiliary shafts 42 and the second protection cover 46, and the fixing base 41 may be a mounting plate, a mounting shell, a mounting table, a mounting rack, or the like, which is not limited herein. It is understood that the fixing seat 41 may be welded or integrally formed on the bottom plate 11 and/or the protection cover 12 of the base 1, thereby improving the installation stability.

It can be understood that the two auxiliary shafts 42 can respectively pass through the fixing base 41 through the rotation of the bearing structure, the two auxiliary shafts 42 are arranged in parallel at intervals, and 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 the auxiliary traction channel 4 a. In order to enable the two auxiliary shafts 42 to drive the two auxiliary traction wheels 43 to synchronously rotate, one end of each auxiliary shaft 42, which is far away from the auxiliary traction wheels 43, is in transmission connection, for example, the transmission connection is realized by adopting structures such as a transmission belt, a chain, gear engagement, and the like.

In this embodiment, a third gear 44 is disposed at an end of each auxiliary shaft 42 away from the auxiliary traction wheel 43, that is, the third gear 44 and the auxiliary traction wheel 43 are disposed at opposite sides of the fixed seat 41, and the two third gears 44 of the two auxiliary shafts 42 are meshed and connected.

In order to facilitate the driving member 2 to drive the two auxiliary shafts 42 to rotate, one end of one auxiliary shaft 42 away from the auxiliary traction wheel 43 is provided with a second belt wheel 45, and the second belt wheel 45 is spaced apart from the third gear 44 and is in transmission connection with the driving member 2 through the transmission belt 21. It can be understood that the output shaft of the driving member 2 is provided with a pulley, so that the belt pulley 21 is sleeved on the pulley of the driving member 2 and the second pulley 45 of the auxiliary shaft 42, so that the driving member 2 drives the pulley to drive the belt pulley 21 and the second pulley 45 to rotate, so that the auxiliary shaft 42 provided with the second pulley 45 rotates, and therefore, the two third gears 44 are meshed to connect, so as to drive the other auxiliary shaft 42 to synchronously rotate, thereby providing power for the auxiliary traction passage 4 a.

It will be appreciated that the second protective cover 46 serves to protect the two auxiliary traction wheels 43 and the auxiliary traction channel 4 a. In this embodiment, the second protection cover 46 is a housing or a box or a cover structure, that is, the second protection cover 46 has a second cavity 461, so that the heat shrinkable tube 7 in the auxiliary traction channel 4a can be rolled up, the second protection cover 46 has a second notch 462 communicating with the second cavity 461, so that the auxiliary traction wheel 43 is partially exposed at the second notch 462, and the auxiliary traction channel 4a is correspondingly communicated with the second notch 462.

In an embodiment, as shown in fig. 1 and 3, the fixing base 41 includes a fixing main body 411 and a sliding plate 412, the fixing main body 411 is provided with a movable slot 413, the sliding plate 412 is slidably connected in the movable slot 413, one auxiliary shaft 42 is inserted through the fixing main body 411, and the other auxiliary shaft 42 is inserted through the sliding plate 412.

It can be understood that, by arranging the fixing base 41 as the fixing body 411 and the sliding plate 412, the fixing body 411 is fixedly arranged on the base body 1, by arranging the movable groove 413 in the fixing body 411 and slidably connecting the sliding plate 412 in the movable groove 413, one auxiliary shaft 42 is inserted into the fixing body 411, and the other auxiliary shaft 42 is inserted into the sliding plate 412, so that the sliding plate 412 drives the one auxiliary shaft 42 to slide or move relative to the fixing body 411 to be close to or far away from the other auxiliary shaft 42, so as to realize the size adjustment of the auxiliary traction channel 4a, thereby adjusting the extrusion deformation amount according to the heat shrinkable tubes 7 of different specifications to provide a proper traction force.

In an embodiment, as shown in fig. 1 and 3, the auxiliary traction assembly 4 further includes a mounting plate 471 and an adjusting screw 473, the mounting plate 471 is disposed at the notch of the movable slot 413, the mounting plate 471 is provided with an adjusting hole 472 communicated with the movable slot 413; the adjusting screw 473 is rotatably arranged in the adjusting hole 472 in a penetrating manner, one end of the adjusting screw 473 extending into the movable groove 413 is rotatably connected with the sliding plate 412, and the other end of the adjusting screw 473 is provided with a second wheel 474; wherein the second hand wheel 474 rotates the adjusting screw 473 to move the sliding plate 412 closer to or away from the mounting plate 471.

In this embodiment, the mounting plate 471 can be fixed on the fixed body 411 by welding or an integral structure and is located at the notch of the movable groove 413. Of course, in other embodiments, the mounting plate 471 may also be disposed on the fixing body 411 by a snap connection, a plug fit, a screw connection, or a pin connection, which may improve the convenience of assembly and disassembly, and is not limited herein.

It can be understood that the mounting plate 471 is provided with an adjusting hole 472 communicating with the movable groove 413, threads can be arranged in the adjusting hole 472, and an outer wall of the adjusting screw 473 is provided with external threads, so that the external threads are matched with the threads in the adjusting hole 472, the adjusting screw 473 is rotatably arranged in the adjusting hole 472 in a penetrating manner, and one end of the adjusting screw 473 penetrates through the adjusting hole 472 and extends into the movable groove 413 and is rotatably connected with the sliding plate 412. The end of the adjusting screw 473 remote from the sliding plate 412 is provided with a second hand wheel 474, so that the second hand wheel 474 can be used to drive the adjusting screw 473 to rotate, so that the sliding plate 412 drives one auxiliary shaft 42 to approach or separate from another auxiliary shaft 42, thereby realizing the size adjustment of the auxiliary traction channel 4 a.

Of course, in other embodiments, an adjusting cylinder or other adjusting structure may be connected to the sliding plate 412 to adjust the size of the auxiliary traction channel 4a, which is not limited herein. It is understood that the inner wall of the movable slot 413 is provided with a sliding rail, and the sliding plate 412 is provided with a sliding slot in sliding fit with the sliding rail.

In the present embodiment, the auxiliary pulling member 4 is provided, so that the expanded heat shrinkable tube 7 is led out to the outside from the pulling channel 32a of the pulling structure 3 by the auxiliary pulling member 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, so that the heat shrink tube 7 can be always in a tight state between the traction channel 32a and the auxiliary traction channel 4a, the auxiliary traction assembly 4 adjusts a gap (the auxiliary traction channel 4a) between the two auxiliary traction wheels 43 through the adjusting screw 473, and the heat shrink tube 7 and the two auxiliary traction wheels 43 slightly slip by adjusting the gap, so that the drawn heat shrink tube 7 can be always kept in a tight state, and the heat shrink tube 7 can be prevented from being stretched and deformed. Meanwhile, the extrusion deformation of the heat shrinkable tube 7 is small, and the good circulation of the compressed gas inside the heat shrinkable tube 7 is also ensured.

It can be understood that when the second handwheel 474 drives the adjusting screw 473 to rotate, so as to adjust the gap between the two auxiliary traction wheels 43 (the auxiliary traction channel 4a), the two third gears 44 of the two auxiliary shafts 42 can still be in meshing transmission, i.e. the gap between the two auxiliary traction wheels 43 can be finely adjusted within a certain range, and the change of the center distance of the third gears 44 within this range can still ensure that the two third gears 44 can be stably meshed.

In one embodiment, as shown in fig. 1, the towing apparatus 100 further includes a limiting assembly 5, and the limiting assembly 5 is disposed on the base 1 and located between the towing structure 3 and the auxiliary towing assembly 4. The limiting assembly 5 comprises a fixing plate 51 and two limiting rods 52, wherein one end of the fixing plate 51 is connected with the base body 1; the two limiting rods 52 are arranged at one end of the fixing plate 51 far away from the base body 1, the two limiting rods 52 are arranged in parallel and at intervals and are matched to form a limiting groove 53 for accommodating the limiting heat shrinkable tube 7, and the limiting groove 53, one end of the traction channel 32a and one end of the auxiliary traction channel 4a are positioned on the same straight line.

It can be understood that, by arranging the limiting component 5 between the traction structure 3 and the auxiliary traction component 4, the limiting groove 53 of the limiting component 5 is located on the same straight line with one end of the traction channel 32a and one end of the auxiliary traction channel 4a, so that the limiting groove 53 of the limiting component 5 is used for guiding and limiting the heat shrinkable tube 7 between the traction channel 32a and the auxiliary traction channel 4a, thereby ensuring that the heat shrinkable tube 7 is prevented from sliding off from the traction channel 32a and/or the auxiliary traction channel 4 in the traction process to cause defective products.

In the present embodiment, the fixing plate 51 may have a plate-like or rod-like structure, and is not limited herein. The fixing plate 51 is used to support, fix and mount two stopper rods 52. The limiting rods 52 may be plate-shaped or rod-shaped, and the two limiting rods 52 are disposed in parallel and spaced apart from each other on the fixing plate 51, and cooperate to form a limiting groove 53.

It can be understood that one limiting rod 52 of the two limiting rods 52 is fixedly connected with the fixing plate 51, and the other limiting rod 52 is movably connected with the fixing plate 51, so that the distance between the two limiting rods 52 is adjusted to adjust the size of the limiting groove 53, thereby ensuring that the limiting groove 53 can be suitable for heat shrinkable tubes 7 with different sizes, and improving the universality and the use convenience.

In this embodiment, a strip-shaped hole is formed in the fixing plate 51, and a limiting rod 52 penetrates through the strip-shaped hole and can move along the strip-shaped hole, so that the distance between the two limiting rods 52 can be adjusted, which is not limited herein.

The limiting component 5 of this embodiment is used for limiting the conveying position of the heat shrinkable tube 7 through the limiting groove 53, so as to ensure that the heat shrinkable tube 7 is transmitted in the central plane of the traction channel 32a or the auxiliary traction channel 4a, and prevent the heat shrinkable tube 7 from deviating.

In an embodiment, as shown in fig. 1 and 4, the traction apparatus 100 further includes a tensioning assembly 6, the tensioning assembly 6 is disposed between the traction structure 3 and/or the auxiliary traction assembly 4 and the driving element 2, the tensioning assembly 6 includes a limiting plate 61, a roller shaft 62, a roller 63 and a screw 64, wherein the limiting plate 61 is disposed on the base 1, and the limiting plate 61 is provided with a strip-shaped hole 611; one end of the roller shaft 62 penetrates through the strip-shaped hole 611, and a screw hole is formed in one end, extending into the strip-shaped hole 611, of the roller shaft 62; the roller 63 is rotatably sleeved on the roller shaft 62 and is abutted against the transmission belt 21; one end of the screw 64 penetrates through the substrate 1 and the limiting plate 61 and extends into the strip-shaped hole 611, and penetrates through the screw; wherein the screw 64 is rotated to move the roller shaft 62 along the bar-shaped hole 611.

In the present embodiment, the limiting plate 61 is used for supporting, mounting and fixing the roller shaft 62, the roller 63 and the screw 64, and the structure of the limiting plate 61 may be a plate-shaped structure, a mounting table, a mounting frame or a mounting seat, and is not limited herein. It can be understood that the limiting plate 61 may be disposed on the bottom plate 11 of the base 1 by welding or integral molding, so that the mounting stability may be improved. Of course, in other embodiments, the limiting plate 61 may also be detachably disposed on the bottom plate 11 of the base 1 by using a snap connection, a plug-in fit, a screw connection, a pin connection, or the like, so as to improve the convenience of assembling and disassembling the tensioning assembly 6.

It can be understood that, by providing the strip-shaped hole 611 on the position-limiting plate 61, the strip-shaped hole 611 extends along the length direction of the position-limiting plate 61, so that the roller shaft 62 is inserted into the strip-shaped hole 611, thereby facilitating the movement of the roller shaft 62 along the strip-shaped hole 611, and thus achieving the position adjustment of the roller shaft 62. In the embodiment, the roller 63 is rotatably sleeved on the roller shaft 62 through a bearing structure, the roller 63 abuts against the belt 21, and the position of the roller shaft 62 is adjusted to enable the roller 63 to press or tension the belt 21, thereby ensuring good transmission of the driving member 2.

In the embodiment, the screw 64 is provided, and a screw hole is provided at one end of the roller shaft 62 extending into the bar hole 611, so that one end of the screw 64 extends into the bar hole 611 through the base 1 and the limiting plate 61, and penetrates through the screw hole, and the roller shaft 62 moves along the bar hole 611 by rotating the screw 64, thereby realizing the position adjustment of the roller shaft 62. Of course, in other embodiments, the screw 64 may be replaced by an adjusting cylinder or other adjusting structure, which is not limited herein.

According to the traction device 100, the traction structure 3 is arranged, the heat shrinkable tube 7 is uniformly and stably led out from the expansion die 8 by the traction structure 3, the caterpillar band 321 type structure is adopted, enough traction force can be guaranteed to be provided for the heat shrinkable tube 7 under smaller extrusion deformation, the caterpillar band 321 adjusts the gap, and the extrusion deformation amount is adjusted according to the heat shrinkable tubes 7 with different specifications to provide proper traction force. By arranging the auxiliary traction assembly 4, the expanded heat shrinkable tube 7 is led out from the interior 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, the heat shrinkable tube 7 can be ensured to be always in a tightening 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, and the heat shrinkable tube 7 and the two auxiliary traction wheels 43 can slightly slip by adjusting the gap, so that the drawn heat shrinkable tube 7 can be ensured to be always kept in the tightening state, the tensile deformation of the heat shrinkable tube 7 can be avoided, meanwhile, the extrusion deformation of a tube is smaller, and the good circulation of compressed gas in the heat shrinkable tube 7 is also ensured. By using the drive belt 21 to drive the output shaft of the drive member 2 in simultaneous transmission connection with the traction structure 3 and the auxiliary traction assembly 4, it is ensured that stable power is provided to the traction structure 3 and the auxiliary traction assembly 4. The limiting component 5 is arranged, the limiting groove 53 is used for limiting the conveying position of the heat shrink tube 7, the heat shrink tube 7 is guaranteed to be transmitted on the central surface of the traction channel 32a and/or the auxiliary traction channel 4a, and the heat shrink tube 7 is prevented from deviating. It can be understood that, by arranging the tensioning assembly 6 so that the roller shaft 62 cooperates with the strip-shaped hole 611 and the screw 64 on the limit plate 61, the roller shaft 62 drives the roller 63 to press or tension the belt 21 between the output shaft of the driving member 2 and the traction structure 3 and/or the belt 21 between the output shaft of the driving member 2 and the auxiliary traction assembly 4, thereby ensuring smooth transmission.

The invention also provides a processing device which comprises an expansion die 8 and a traction device 100, wherein the expansion die 8 is arranged opposite to the traction channel 32a of the traction device 100. The specific structure of the traction apparatus 100 refers to the foregoing embodiments, and since the processing device uses all technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.