Double-eye drawing frame

Abstract

The utility model discloses a double-eye drawing frame, which belongs to the technical field of drawing frames and comprises a casing, the casing is provided with a working space, and at least one side of the working space is open. The storage barrel assembly is contained in the working space, the storage barrel assembly is provided with a rotatable inner barrel and a rotatable outer barrel, the inner barrel is rotatably arranged in the outer barrel, a containing space is formed between the outer peripheral wall of the inner barrel and the outer peripheral wall of the outer barrel, and the inner barrel and the containing space are used for containing cotton slivers; the drawing assembly is movably arranged in the working space, the drawing assembly is provided with a first outlet and a second outlet, and the drawing assembly moves to selectively control the first outlet and / or the second outlet to move. According to the double-hole drawing frame designed by the utility model, the cotton slivers are orderly stored in the inner barrel and / or the accommodating space, the possibility that the cotton slivers are disordered or knotted is reduced, meanwhile, the subsequent taking and processing of the cotton slivers are also facilitated, and the overall production efficiency of a production line is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the drawing -in machine technical field, concretely relates to double eye drawing -in machine. BACKGROUND

[0002] In related art, in the textile industry, the drawing-in machine is used for the process of combining multiple short fiber strips (such as cotton strips) into a thicker strip to ensure the uniformity and consistency of fibers in subsequent spinning processes, in the prior art, the double eye drawing-in machine outputs two cotton strips, and the output cotton strips directly enter the storage barrel, when the storage barrel stores too much, the cotton strips are prone to knotting, which affects the subsequent production process. UTILITARY MODEL

[0003] The utility model aims at at least solving one of the technical problems in the prior art, for this purpose, one purpose of the utility model is to provide a double eye drawing-in machine.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The utility model provides double eye drawing-in machine, include: the casing, the casing is provided with work space, work space is open at least one side in length direction Setting, storage barrel subassembly, the storage barrel subassembly is housed in work space, the storage barrel subassembly is provided with rotatable inner bucket and outer bucket, the inner bucket rotatably set in the outer bucket, the outer peripheral wall of inner bucket and the outer peripheral wall of outer bucket have the accommodation space, the inner bucket and the accommodation space are used for accommodating cotton strip respectively, drawing-in subassembly, the drawing-in subassembly movably set in work space, the drawing-in subassembly is provided with first outlet and second outlet, and the cotton strip discharged from the first outlet is suitable for entering the inner bucket, and the cotton strip discharged from the second outlet is suitable for entering the accommodation space, the drawing-in subassembly moves to selectively control the movement of the first outlet and / or the second outlet.

[0006] According to the double eye drawing-in machine of the utility model, through the rotation of the inner bucket and / or the outer bucket, and through the movement of the first outlet and / or the second outlet, the orderly storage of the cotton strip in the inner bucket and / or the accommodation space is realized, the possibility of cotton strip disorder or knotting is reduced, and the subsequent use and processing of the cotton strip are also facilitated, and the overall production efficiency of the production line is improved.

[0007] Further, the drawing-in assembly comprises a first driving motor connected with the casing, the first driving motor having a first driving end selectively movable in a radial direction towards or away from the storage barrel assembly; a first drawing-in rod provided with the first outlet, the first drawing-in rod being connected with the first driving end; a second driving motor connected with the casing, the second driving motor having a second driving end selectively movable in a radial direction towards or away from the storage barrel assembly; and a second drawing-in rod provided with the second outlet, the second drawing-in rod being connected with the second driving end.

[0008] Further, the storage barrel assembly further comprises a housing provided with a mounting cavity, the mounting cavity being rotatably provided with the outer barrel; and a driving mechanism having a rotatable driving shaft, the driving shaft being adapted to move in a height direction to selectively drive the outer barrel and / or the inner barrel to rotate.

[0009] Further, the bottom of the outer barrel is provided with a first rotation hole, the inner wall of the first rotation hole being provided with a first limiting portion, the bottom of the inner barrel is provided with a second rotation hole, the first rotation hole, the second rotation hole and the driving shaft being coaxially arranged with each other, the inner wall of the second rotation hole being provided with a second limiting portion, the driving shaft being selectively matched with the first limiting portion and / or the second limiting portion to drive the outer barrel and / or the inner barrel to rotate by moving in the height direction.

[0010] Further, the first limiting portion is configured as a first limiting block, the second limiting portion is configured as a second limiting block, and the outer peripheral wall of the driving shaft is provided with a third limiting block, the third limiting block being selectively circumferentially abutted with the first limiting block and / or the second limiting block.

[0011] Further, the driving mechanism comprises a telescopic motor provided in the housing, the telescopic motor having a first piston rod; and a rotation motor connected with the first piston rod, the rotation motor being provided with the driving shaft.

[0012] Further, the inner peripheral wall of the housing is provided with a first limiting ring extending in a circumferential direction, the outer peripheral wall of the outer barrel is provided with a second limiting ring extending in a circumferential direction, and the top of the first limiting ring is adapted to abut against the bottom of the second limiting ring.

[0013] Further, the bottom of the outer barrel is provided with a receiving groove extending in a circumferential direction, and a plurality of rotatable balls are received in the receiving groove, the top of the plurality of balls being adapted to abut against the bottom of the inner barrel.

[0014] The other advantages, objects, and features of the present application will become apparent from the following specification, and it is intended to be covered by the following claims, and it will be apparent that changes can be made in the application without departing from the scope of the application, and it is intended to cover what is described in the specification and its procedural equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is described in the following drawings:

[0016] Figure 1 is a schematic view of the double-eye drawing frame of the present application;

[0017] Figure 2 is a sectional view of the storage barrel assembly of the present application;

[0018] Figure 3 is Figure 2 is an enlarged view of circle A.

[0019] The following signs are marked in the drawings:

[0020] 10, machine shell; 11, working space;

[0021] 20, storage barrel assembly; 21, outer barrel; 211, first limiting block; 22, inner barrel; 221, second limiting block; 23, shell; 241, driving shaft; 2411, third limiting block; 242, telescopic motor; 243, rotating motor; 25, ball;

[0022] 31, first driving motor; 32, first drawing rod; 321, first outlet; 33, second drawing rod; 331, second outlet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is described in the following drawings:

[0024] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without these specific details. In other instances, well-known structures, circuits, materials or methods have not been described in detail in order to avoid obscuring the present application.

[0025] Reference throughout this specification to "one embodiment", "an embodiment", "one example", or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the application. Therefore, appearances of the phrases "one embodiment", "an embodiment", "one example", or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics can be combined in any suitable

[0026] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0027] Embodiment one:

[0028] As shown in Figures 1-3 The present application provides a double eye drawing frame, comprising: a casing 10, a storage bucket assembly 20 and a drawing assembly, the casing 10 is provided with a working space 11, the working space 11 is provided with at least one side open in the length direction, the storage bucket assembly 20 is accommodated in the working space 11, the storage bucket assembly 20 is provided with a rotatable inner bucket 22 and an outer bucket 21, the inner bucket 22 is rotatably arranged in the outer bucket 21, there is an accommodation space between the outer peripheral wall of the inner bucket 22 and the outer peripheral wall of the outer bucket 21, the inner bucket 22 and the accommodation space are respectively used for accommodating cotton slivers, the drawing assembly is movably arranged in the working space 11, the drawing assembly is provided with a first outlet 321 and a second outlet 331, the cotton slivers discharged from the first outlet 321 are suitable for entering the inner bucket 22, the cotton slivers discharged from the second outlet 331 are suitable for entering the accommodation space, and the drawing assembly moves to selectively control the movement of the first outlet 321 and / or the second outlet 331.

[0029] In some embodiments, the machine housing 10 is internally provided with a working space 11 for accommodating various components of the machine, one side of the working space 11 is open to facilitate the operator to put or take out the storage barrel assembly 20 from the working space 11, the storage barrel assembly 20 is selectively located in the working space 11 (when the storage barrel assembly 20 is full of stored cotton, the storage barrel assembly 20 can be moved out of the working space 11), the storage barrel assembly 20 is composed of a rotatable inner barrel 22 and an outer barrel 21, the inner barrel 22 is installed in the outer barrel 21 and can rotate in the outer barrel 21, and there is a receiving space between the inner barrel 22 and the outer barrel 21 for storing cotton, and at the same time, the inner barrel 22 itself can also directly store cotton.

[0030] The doubling assembly is also located in the working space 11 and can be moved, and the doubling assembly includes a first outlet 321 and a second outlet 331 corresponding to the inner barrel 22 or the receiving space for delivering cotton respectively, by moving the doubling assembly, the position of the first outlet 321 and / or the second outlet 331 can be selectively controlled to determine the position of the vertical falling of the cotton.

[0031] It can be understood that the cotton can enter the inner barrel 22 through the first outlet 321, and the cotton can enter the receiving space between the inner barrel 22 and the outer barrel 21 through the second outlet 331, since the inner barrel 22 is rotatable, and the doubling assembly can be moved to adjust the position of the first outlet 321 and / or the second outlet 331, when the cotton is discharged from the first outlet 321, with the rotation of the inner barrel 22 and the adjustment of the position of the first outlet 321, the cotton will be wound and stored one turn after another in the circumferential direction of the inner barrel 22 (specifically, the inner barrel 22 rotates, and the first outlet 321 moves in the direction away from the axis of the inner barrel 22, so that the cotton stored in the inner barrel 22 forms one turn after another of cotton wound spirally from inside to outside, and the one turn after another of cotton wound spirally constitutes the first layer of cotton of the inner barrel 22, then the first outlet 321 moves in the direction close to the axis of the inner barrel 22, so that the second layer of cotton forms one turn after another of cotton wound spirally from outside to inside, of course, the third layer of cotton is the same as the first layer of cotton, and so on). Similarly, if the cotton needs to be stored in the receiving space, the rotation of the outer barrel 21 and the movement of the second outlet 331 can also achieve similar effects.

[0032] According to the double-eye doubling machine of the utility model, through the rotation of the inner barrel 22 and / or the outer barrel 21, and through the movement of the first outlet 321 and / or the second outlet 331, the orderly storage of the cotton in the inner barrel 22 and / or the receiving space is realized, the possibility of the cotton being disordered or knotted is reduced, and the subsequent taking and processing of the cotton are also facilitated, and the overall production efficiency of the production line is improved.

[0033] Embodiment two:

[0034] The embodiment is based on the first embodiment, and the doubling assembly comprises a first driving motor 31, a first doubling rod 32, a second driving motor and a second doubling rod 33. The first driving motor 31 is connected to the machine shell 10, and the first driving motor 31 has a first driving end that can be moved in the radial direction towards or away from the storage barrel assembly 20. The first doubling rod 32 is provided with a first outlet 321, and the first doubling rod 32 is connected to the first driving end. The second driving motor is connected to the machine shell 10, and the second driving motor has a second driving end that can be moved in the radial direction towards or away from the storage barrel assembly 20. The second doubling rod 33 is provided with a second outlet 331, and the second doubling rod 33 is connected to the second driving end.

[0035] In some embodiments, the first driving motor 31 is mounted on the machine shell 10 and has a first driving end that can be moved in the radial direction, and the first driving end can be moved towards or away from the storage barrel assembly 20. The first doubling rod 32 is connected to the first driving end of the first driving motor 31 and is provided with a first outlet 321. With the movement of the first driving end, the first doubling rod 32 can also move in the radial direction accordingly to adjust the position of the first outlet 321.

[0036] The second driving motor is also mounted on the machine shell 10, but the second driving motor is responsible for driving the second doubling rod 33. The second driving motor has a second driving end that can be moved in the radial direction. The second doubling rod 33 is connected to the second driving end of the second driving motor and is provided with a second outlet 331. The second doubling rod 33 can be moved in the radial direction as needed to adjust the position of the second outlet 331.

[0037] It can be understood that the first doubling rod 32 and the second doubling rod 33 are respectively controlled by the first driving motor 31 and the second driving motor. The first doubling rod 32 and the second doubling rod 33 can move in different directions at different time points, providing higher operation flexibility. Moreover, through the radial movement of the first driving end and the second driving end, the first outlet 321 and the second outlet 331 can be accurately aligned with the target area, ensuring the correct placement of the sliver. Of course, the first doubling rod 32 and the second doubling rod 33 can work simultaneously to handle two slivers respectively, or work alternately according to production needs, improving the working efficiency of the double eye doubling machine. At the same time, the positions of the first doubling rod 32 and the second doubling rod 33 can be adjusted, so that the double eye doubling machine can adapt to different specifications of the sliver and different production process requirements, enhancing the versatility and adaptability of the double eye doubling machine.

[0038] Embodiment three:

[0039] The embodiment is based on the embodiment two, the storage barrel assembly 20 further comprises: a shell 23 and a driving mechanism, the shell 23 is provided with a mounting cavity, the mounting cavity is rotatably provided with an outer barrel 21, and the driving mechanism has a rotatable driving shaft 241, the driving shaft 241 is suitable for moving in the height direction to selectively drive the outer barrel 21 and / or the inner barrel 22 to rotate.

[0040] In some embodiments, the storage barrel assembly 20 has a shell 23, the shell 23 is internally formed with a mounting cavity, the mounting cavity is used to accommodate other components (the outer barrel 21, the inner barrel 22, etc.), the outer barrel 21 is rotatably arranged in the mounting cavity in the shell 23, the inner barrel 22 is also rotatable, and the inner barrel 22 is located inside the outer barrel 21, there is a gap between the inner barrel 22 and the outer barrel 21, which is a storage space, which can be used to store cotton, and the driving mechanism includes a driving shaft 241, the driving shaft 241 can move in the height direction (i.e. up and down), and can selectively drive the outer barrel 21 or the inner barrel 22 to rotate. That is, according to the position of the driving shaft 241, the driving shaft 241 can contact the outer barrel 21 or the inner barrel 22 and drive them to rotate.

[0041] It can be understood that the working principle of the driving mechanism mainly depends on the vertical movement of the driving shaft 241 to selectively drive the outer barrel 21 or the inner barrel 22. When the driving shaft 241 moves to a certain position, the driving shaft 241 will contact the specific structure (such as a limiting block) at the bottom of the outer barrel 21 or the inner barrel 22, so as to drive the corresponding part to rotate when the driving shaft 241 rotates. In this way, it can be accurately controlled which part (the outer barrel 21 or the inner barrel 22) rotates at what time to achieve the ideal cotton management effect.

[0042] It is worth mentioning that the driving shaft 241 can be individually matched with the inner barrel 22 or the outer barrel 21 to realize the independent driving of the inner barrel 22 or the outer barrel 21 to rotate, of course, the driving shaft 241 can be matched with the inner barrel 22 and the outer barrel 21 at the same time to realize the simultaneous driving of the inner barrel 22 and the outer barrel 21 to rotate.

[0043] It should be noted that, with the discharge of the cotton and the rotation of the inner barrel 22, the discharged cotton can be stored in the inner barrel 22 in the circumferential direction, so that the storage of the cotton in the inner barrel 22 is more neat, and the phenomenon of knotting of the cotton stored in the inner barrel 22 is avoided. Of course, the storage principle of the cotton in the outer barrel 21 is the same as that in the inner barrel 22, which will not be described here.

[0044] According to some embodiments of the present application, the bottom of the outer barrel 21 is provided with a first rotating hole, the inner wall of the first rotating hole is provided with a first limiting part, the bottom of the inner barrel 22 is provided with a second rotating hole, the first rotating hole, the second rotating hole and the driving shaft 241 are coaxially arranged with each other, the inner wall of the second rotating hole is provided with a second limiting part, and the driving shaft 241 moves in the height direction to selectively cooperate with the first limiting part and / or the second limiting part to drive the outer barrel 21 and / or the inner barrel 22 to rotate.

[0045] It can be understood that the driving shaft 241 can move in the height direction and can selectively cooperate with the first limiting part or the second limiting part, by controlling the position of the driving shaft 241, one of the outer barrel 21 or the inner barrel 22 can be selected to rotate, or both can be driven to rotate at the same time. Specifically, when the driving shaft 241 rises and contacts the first limiting part, the driving shaft 241 can drive the outer barrel 21 to rotate together; if the driving shaft 241 descends and contacts the second limiting part, the driving shaft 241 can drive the inner barrel 22 to rotate.

[0046] Preferably, the first limiting part is configured as a first limiting block 211, the second limiting part is configured as a second limiting block 221, and the outer peripheral wall of the driving shaft 241 is provided with a third limiting block 2411, which selectively abuts against the first limiting block 211 and / or the second limiting block 221 in the circumferential direction.

[0047] It can be understood that when the driving shaft 241 moves up and down, the third limiting block 2411 will correspondingly approach or move away from the first limiting block 211 or the second limiting block 221, if the third limiting block 2411 abuts against the first limiting block 211, the driving shaft 241 will drive the outer barrel 21 to rotate together when rotating; if the third limiting block 2411 abuts against the second limiting block 221, the driving shaft 241 will drive the inner barrel 22 to rotate together when rotating; if it is required to drive the inner and outer barrels 21 to rotate at the same time, the position of the driving shaft 241 can be adjusted so that the third limiting block 2411 abuts against the first and second limiting blocks 221 at the same time.

[0048] It is worth mentioning that through the abutting action of the limiting block, the rotation of the inner and outer barrels 21 can be very accurately controlled, ensuring the accuracy and reliability of the driving process, compared with other possible solutions (such as using multiple independent driving devices), this single driving shaft 241 plus limiting block design greatly simplifies the mechanical structure, reduces the number of parts, improves the compactness and reliability of the system, and the above-mentioned arrangement allows flexible selection of driving which barrel to rotate or driving both barrels to rotate at the same time according to actual needs, increasing the adaptability and flexibility of the system. At the same time, due to the relatively simple mechanical structure, the potential failure points are reduced, and the maintenance cost and frequency are reduced.

[0049] According to some embodiments of the utility model, driving mechanism includes: telescopic motor 242 and rotation motor 243, telescopic motor 242 is set up in the shell 23, telescopic motor 242 has first piston rod, rotation motor 243 is connected with first piston rod, rotation motor 243 is provided with driving shaft 241.

[0050] In some embodiments, telescopic motor 242 is installed inside the shell 23, telescopic motor 242 is responsible for providing the moving power in the vertical direction, telescopic motor 242 is equipped with first piston rod, first piston rod can move up and down according to the instruction of telescopic motor 242, rotation motor 243 is connected with the first piston rod of telescopic motor 242, and driving shaft 241 is arranged on rotation motor 243, when first piston rod moves, will drive rotation motor 243 and the driving shaft 241 on it move together.

[0051] It can be understood that telescopic motor 242 adjusts the height position of driving shaft 241 through the telescopic of first piston rod, so that the third limit block 2411 on driving shaft 241 can selectively contact first limit block 211 or second limit block 221, once driving shaft 241 reaches the appropriate position, rotation motor 243 starts to work, and rotates force is transmitted to outer drum 21 or inner drum 22 through driving shaft 241, or to both.

[0052] Embodiment four:

[0053] This embodiment is based on embodiment three, the inner circumferential wall of shell 23 is provided with a first limit ring extending in the circumferential direction, the outer circumferential wall of outer drum 21 is provided with a second limit ring extending in the circumferential direction, the top of first limit ring is adapted to abut against the bottom of second limit ring.

[0054] In some embodiments, the first limit ring is arranged on the inner circumferential wall of shell 23 and extends in the circumferential direction, the first limit ring provides a fixed reference surface for limiting the up-down movement range of outer drum 21, the second limit ring is arranged on the outer circumferential wall of outer drum 21, the second limit ring also extends in the circumferential direction, the bottom of second limit ring is designed to abut against the top of first limit ring to limit the downward movement of outer drum 21, so that outer drum 21 can be stably matched with shell 23, and the stable position of outer drum 21 in shell 23 is ensured, and good stability can be maintained even in high-speed rotation.

[0055] It is worth mentioning that the matching mode of outer drum 21 and shell 23 is simple and stable through the above-mentioned arrangement, and the matching of outer drum 21 and shell 23 can be realized only by putting outer drum 21 into shell 23, of course, when it is necessary to separate outer drum 21 and shell 23, outer drum 21 can be taken out in the height direction.

[0056] According to some embodiments of the present application, the bottom of the outer barrel 21 is provided with a circumferentially extending receiving groove, and a plurality of rotatable balls 25 are received in the receiving groove, the top of the balls 25 being adapted to abut against the bottom of the inner barrel 22.

[0057] It can be understood that the presence of the balls 25 significantly reduces the direct contact area between the inner barrel 22 and the bottom of the outer barrel 21, thereby greatly reducing the friction between the inner barrel 22 and the outer barrel 21, allowing the inner barrel 22 to rotate more easily within the outer barrel 21. Moreover, the balls 25 not only reduce friction but also provide a support function. When the inner barrel 22 rotates, the balls 25 are evenly distributed in the receiving groove on the bottom of the outer barrel 21, supporting the weight of the inner barrel 22, ensuring smooth rotation of the inner barrel 22. At the same time, since the balls 25 can rotate freely, they can provide a rolling contact surface when the inner barrel 22 rotates, helping to guide the rotation path of the inner barrel 22 and maintaining the smoothness and accuracy of the rotation of the inner barrel 22.

[0058] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and detail without departing from the scope defined by the claims of the present application.

Claims

1. A double drawing frame, characterized in that, The application relates to a yarn feeding device, which comprises: a cabinet provided with a working space, which is open on at least one side in the length direction; a storage barrel assembly accommodated in the working space, which is provided with a rotatable inner barrel and an outer barrel, the inner barrel is rotatably arranged in the outer barrel, and a receiving space is formed between the outer peripheral wall of the inner barrel and the outer peripheral wall of the outer barrel, the inner barrel and the receiving space are used for accommodating cotton yarn respectively; a doubling assembly movably arranged in the working space, which is provided with a first outlet and a second outlet, the cotton yarn discharged from the first outlet is suitable for entering the inner barrel, and the cotton yarn discharged from the second outlet is suitable for entering the receiving space, and the doubling assembly is moved to selectively control the movement of the first outlet and / or the second outlet.

2. The double drawing frame according to claim 1, characterized in that, The doubling assembly comprises: a first driving motor connected with the cabinet, which has a first driving end selectively movable in the radial direction towards or away from the storage barrel assembly; a first doubling rod provided with the first outlet and connected with the first driving end; a second driving motor connected with the cabinet, which has a second driving end selectively movable in the radial direction towards or away from the storage barrel assembly; a second doubling rod provided with the second outlet and connected with the second driving end.

3. The double drawing frame according to claim 2, characterized in that The storage barrel assembly further comprises: a housing provided with a mounting cavity, and the outer barrel is rotatably arranged in the mounting cavity; a driving mechanism having a rotatable driving shaft, which is suitable for moving in the height direction to selectively drive the outer barrel and / or the inner barrel to rotate.

4. The double drawing frame according to claim 3, characterized in that The bottom of the outer barrel is provided with a first rotating hole, the inner wall of the first rotating hole is provided with a first limiting part, the bottom of the inner barrel is provided with a second rotating hole, the first rotating hole, the second rotating hole and the driving shaft are coaxially arranged, the inner wall of the second rotating hole is provided with a second limiting part, and the driving shaft is moved in the height direction to selectively cooperate with the first limiting part and / or the second limiting part to drive the outer barrel and / or the inner barrel to rotate.

5. The double drawing frame according to claim 4, characterized in that The first limiting part is configured as a first limiting block, the second limiting part is configured as a second limiting block, the outer peripheral wall of the driving shaft is provided with a third limiting block, and the third limiting block is selectively circumferentially abutted against the first limiting block and / or the second limiting block.

6. A double drawing frame according to claim 5, characterised in that, The driving mechanism comprises: a telescopic motor arranged in the housing, which has a first piston rod; a rotating motor connected with the first piston rod, and the rotating motor is provided with the driving shaft.

7. A double drawing frame according to claim 3, characterized in that The inner peripheral wall of the housing is provided with a first limiting ring extending in the circumferential direction, the outer peripheral wall of the outer barrel is provided with a second limiting ring extending in the circumferential direction, and the top of the first limiting ring is suitable for abutting against the bottom of the second limiting ring.

8. A double drawing frame according to claim 7, characterised in that, The bottom of the outer barrel is provided with a receiving groove extending in the circumferential direction, and a plurality of rotatable balls are accommodated in the receiving groove, and the top of the plurality of balls is suitable for abutting against the bottom of the inner barrel.

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