Tow material roll winding and unwinding device

Abstract

The present invention provides a filament bundle reel winding and unwinding device for a feeding mechanism applied to an automatic fiber placement machine, which relates to the technical field of aerospace material production equipment and specifically includes: a driving assembly, a bearing assembly, and a limiting assembly; a bearing shaft penetrates into the inside of a filament bundle reel to hold the filament bundle reel, and a driving motor drives the bearing shaft to rotate through a driving shaft, realizing the transmission connection to the filament bundle reel, thereby precisely controlling the unwinding speed and the strip tension, ensuring a constant laying tension and a stable unwinding speed. Moreover, the top surface of the first limiting member abuts against the filament bundle reel, and the elastic limiting portion of the second limiting member abuts against the end of the filament bundle reel, preventing the filament bundle reel from loosening or shifting during the unwinding process. When the filament bundle reel needs to be disassembled, the elastic limiting portion can be pressed to make its top surface contract to be flush with the surface of the bearing shaft, and then the filament bundle reel is pulled out to complete the disassembly. The disassembly process is simple and time-consuming, and can reduce the production downtime during the replacement process, thereby improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace material production equipment, and more particularly, to a filament bundle reel winding and unwinding device. Background Art

[0002] Composite materials have been increasingly widely used in many industrial fields due to a series of advantages such as light weight, high strength, high modulus, fatigue resistance, corrosion resistance, designability, and good processability. They are particularly suitable for large structures and integral structures and are ideal aerospace structural materials. With the enlargement of aircraft, the structural dimensions and usage amounts of composite material components used on aircraft have been continuously increasing. The automatic fiber placement technology for manufacturing large and complex composite material components has obtained rapid development and industrial application.

[0003] During the placement process of a composite material automatic fiber placement machine, the final properties of the material are very sensitive to the forming process, and the final properties are also imparted to the structural member through the forming process. Therefore, the forming process parameters determine the performance and quality of the composite material structure. The placement tension and the unwinding speed are important parameters of the fiber bundle placement forming process and have important influences on the mechanical properties, density, and resin content of the placed product.

[0004] In the existing fiber placement head unwinding device during the unwinding process, it is impossible to accurately control the unwinding speed and the strip tension during the placement process, which may lead to situations such as strip slack. In addition, the process of replacing the material roll in the existing device is cumbersome, requiring manual disassembly and installation of multiple components, which is time-consuming and requires high operation skills. The production downtime during the replacement process is relatively long, which greatly affects the production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a filament bundle reel winding and unwinding device to alleviate the technical problems in the prior art that in the unwinding process of the fiber placement head unwinding device, it is impossible to accurately control the unwinding speed and the strip tension during the placement process, and the process of replacing the material roll is cumbersome.

[0006] The present invention provides a yarn bundle material roll reel-taking-up device, which is applied to the feeding mechanism of an automatic yarn laying machine, comprising: a driving assembly, a bearing assembly and a limiting assembly, the driving assembly comprising a driving motor, which is arranged in a yarn box frame, and the driving motor has a driving shaft; the bearing assembly comprises a bearing shaft, which is transmission-connected to the driving shaft and is used to penetrate the yarn bundle and carry the yarn bundle; the limiting assembly comprises a first limiting member and a second limiting member, the first limiting member is arranged at one end of the bearing shaft close to the driving shaft, the top surface of the first limiting member protrudes from the outer wall of the bearing shaft and is used to abut against the inner wall of the yarn bundle, the second limiting member is arranged at one end of the bearing shaft away from the driving assembly, the second limiting member has an elastic limiting portion, the top surface of the elastic limiting portion protrudes from the outer wall of the bearing shaft and is used to abut against the end of the yarn bundle roll.

[0007] Furthermore, the driving shaft includes a connecting part and a bearing part; one end of the connecting part is drivingly connected to the driving shaft; one end of the bearing part is connected to the other end of the connecting part, and the other end of the bearing part is connected to the second limiting member; the first limiting member is arranged at the connection between the connecting part and the bearing part.

[0008] Furthermore, the first limiting member is a limiting wheel; the limiting wheel is embedded in the load-bearing shaft, the rotation direction of the limiting wheel is the same as the axial direction of the driving shaft, and the top surface of the limiting wheel protrudes from the axial surface of the load-bearing shaft; there are multiple limiting wheels, and the multiple limiting wheels are arranged at intervals along the circumference of the load-bearing shaft.

[0009] Furthermore, the limiting assembly also includes a limiting ring; the limiting ring is sleeved on an end of the connecting portion away from the bearing portion, and a side wall of the limiting ring abuts against a side wall of the tow roll.

[0010] Furthermore, the driving assembly also includes a mounting frame; the mounting frame is used to be connected to the yarn box frame, and the driving motor is arranged on the mounting frame; a side of the limiting ring close to the driving motor abuts against and slidably cooperates with the mounting frame.

[0011] Further, the second limiting member is a limiting seat; one end of the limiting seat has an access port, the access port is sleeved on the end of the bearing shaft away from the driving assembly, and a mounting groove is provided on the side wall of the limiting seat; the elastic limiting part includes an elastic reset member and a limiting claw, the elastic reset member is arranged in the limiting seat, the limiting claw is embedded in the mounting groove and one end is rotatably connected to the limiting seat, and the side of the limiting claw facing the limiting seat abuts against the elastic reset member.

[0012] Further, a backstop is provided on the side of the limiting claw close to the inside of the limiting seat; the backstop is located inside the limiting seat and the length of the backstop is greater than the width of the mounting groove to prevent the limiting claw from flipping out of the mounting groove.

[0013] Further, the surface of the limiting claw outside the limiting seat is a stepped structure; the side surface of the stepped structure abuts against the side wall of the tow bobbin.

[0014] Further, the carrying assembly further includes a core shaft; a support frame is provided inside the limiting seat, and a jack is provided on the support frame; the core shaft is arranged inside the carrying shaft, one end of the core shaft is in driving connection with the driving shaft, and the other end is inserted into the jack.

[0015] Further, the limiting seat and the carrying shaft are in interference fit.

[0016] Beneficial effects:

[0017] The tow bobbin winding and unwinding device provided by the present invention is applied to the feeding mechanism of an automatic fiber placement machine, and specifically includes: a driving assembly, a carrying assembly and a limiting assembly; the driving assembly includes a driving motor, the driving motor is arranged inside a yarn box frame, and the driving motor has a driving shaft; the carrying assembly includes a carrying shaft, the carrying shaft is in driving connection with the driving shaft and is used for threading through a tow bobbin and carrying it; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is arranged at one end of the carrying shaft close to the driving shaft, the top surface of the first limiting member protrudes from the outer wall of the carrying shaft and is used for abutting against the inner wall of the tow bobbin, the second limiting member is arranged at one end of the carrying shaft far from the driving assembly, and the second limiting member has an elastic limiting portion, the top surface of the elastic limiting portion protrudes from the outer wall of the carrying shaft and is used for abutting against the end of the tow bobbin.

[0018] Specifically, in this embodiment, the carrying shaft passes through the inside of the tow bobbin to hold the tow bobbin, the driving motor is arranged in the yarn box frame of the automatic fiber placement machine, and the driving motor drives the carrying shaft to rotate through its driving shaft, realizing the driving connection of the tow bobbin, thereby accurately controlling the feeding speed and the strip tension, ensuring a constant laying tension and a stable feeding speed, improving the quality and performance of the product, and moreover, the design of the carrying shaft can adapt to tow bobbins of different sizes, ensuring the versatility and flexibility of the equipment. In addition, after the top surface of the first limiting member abuts against the tow bobbin, it can prevent the tow bobbin from sliding or shifting on the carrying shaft, ensuring its fixed position. The elastic limiting portion of the second limiting member abuts against the end of the tow bobbin to prevent the tow bobbin from loosening or shifting during the feeding process. When the tow bobbin needs to be disassembled, the elastic limiting portion can be pressed to make its top surface shrink to be flush with the surface of the carrying shaft, and then the tow bobbin is pulled out to complete the disassembly. The disassembly process is simple and time-consuming short, which can reduce the production downtime during the replacement process, thereby improving the production efficiency. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of the filament bundle reel winding and unwinding device provided by the embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the cooperation relationship between the filament bundle reel winding and unwinding device provided by the embodiment of the present invention and the filament bundle reel;

[0022] Figure 3 Structural schematic diagram of the driving component in the filament bundle reel winding and unwinding device provided by the embodiment of the present invention;

[0023] Figure 4 Structural schematic diagram of the bearing component in the filament bundle reel winding and unwinding device provided by the embodiment of the present invention;

[0024] Figure 5 Structural schematic diagram of the second limiting member in the filament bundle reel winding and unwinding device provided by the embodiment of the present invention;

[0025] Figure 6 Side view sectional view of the second limiting member in the filament bundle reel winding and unwinding device provided by the embodiment of the present invention.

[0026] Icon:

[0027] 100 - Driving component; 110 - Driving motor; 111 - Driving shaft; 120 - Mounting frame;

[0028] 200 - Bearing component; 210 - Connecting part; 220 - Bearing part; 230 - Core shaft;

[0029] 300 - Limiting component; 310 - First limiting member; 320 - Second limiting member; 321 - Elastic reset member; 322 - Pressing section; 323 - Protruding section; 324 - Anti - reverse member; 325 - Support frame; 330 - Limiting ring. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0035] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0037] As Figures 1 to 6 shown, the tow bale winding and unwinding device provided in this embodiment is applied to the feeding mechanism of an automatic fiber placement machine, and specifically includes a driving assembly 100, a carrying assembly 200, and a limiting assembly 300.

[0038] Among them, the driving assembly 100 includes a driving motor 110, the driving motor 110 is arranged inside the yarn box frame, and the driving motor 110 has a driving shaft 111. The bearing assembly 200 includes a bearing shaft, the bearing shaft is in transmission connection with the driving shaft 111 and is used to penetrate into the tow bobbin and bear it. The limiting assembly 300 includes a first limiting member 310 and a second limiting member 320. The first limiting member 310 is arranged at one end of the bearing shaft close to the driving shaft 111. The top surface of the first limiting member 310 protrudes from the outer wall of the bearing shaft and is used to abut against the inner wall of the tow bobbin. The second limiting member 320 is arranged at one end of the bearing shaft far from the driving assembly 100. The second limiting member 320 has an elastic limiting portion, and the top surface of the elastic limiting portion protrudes from the outer wall of the bearing shaft and is used to abut against the end of the tow bobbin.

[0039] Specifically, in this embodiment, the bearing shaft penetrates into the interior of the tow bobbin to hold the tow bobbin, and the driving motor 110 is arranged in the yarn box frame of the automatic fiber placement machine.

[0040] The driving motor 110 drives the bearing shaft to rotate through its driving shaft 111, realizing the transmission connection of the tow bobbin, thereby accurately controlling the feeding speed and the tape tension, ensuring a constant laying tension and a stable feeding speed, and improving the quality and performance of the product.

[0041] Moreover, the design of the bearing shaft can adapt to tow bobbins of different sizes, ensuring the versatility and flexibility of the equipment.

[0042] In addition, after the top surface of the first limiting member 310 abuts against the tow bobbin, it can prevent the tow bobbin from sliding or shifting on the bearing shaft, ensuring its fixed position. The elastic limiting portion of the second limiting member 320 abuts against the end of the tow bobbin, preventing the tow bobbin from loosening or shifting during the feeding process.

[0043] When the tow bobbin needs to be disassembled, the elastic limiting portion can be pressed so that its top surface shrinks to be flush with the surface of the bearing shaft, and then the tow bobbin is pulled out along the axial direction of the bearing shaft to disassemble the tow bobbin.

[0044] Similarly, when installing the tow bobbin, the inner cylinder of the tow bobbin can be aligned with the bearing shaft and pushed along the axial direction of the bearing shaft, so that the inner wall of the tow bobbin compresses the elastic limiting portion, enabling the tow bobbin to be loaded onto the bearing shaft. When the tow bobbin is installed in place, the end of the tow bobbin disengages from the top surface of the elastic limiting portion, and the elastic limiting portion recovers its deformation under the elastic action and abuts against the end face of the tow bobbin, realizing the limiting of the tow bobbin. The disassembly and assembly operations are simple and time-consuming, which can reduce the production downtime during the replacement process, thereby improving the production efficiency.

[0045] In this embodiment, the drive shaft 111 includes a connection part 210 and a bearing part 220. One end of the connection part 210 is in transmission connection with the drive shaft 111. One end of the bearing part 220 is connected to the other end of the connection part 210, and the other end of the bearing part 220 is connected to the second limiting member 320. The first limiting member 310 is arranged at the connection position between the connection part 210 and the bearing part 220.

[0046] Specifically, in this embodiment, one end of the connection part 210 is in transmission connection with the drive shaft 111, so as to drive the bearing part 220 connected to the other end of the connection part 210 to rotate together, thereby realizing the rotary discharging of the tow bundle roll carried by the bearing part 220.

[0047] Wherein, the specific size of the bearing part 220 can be changed according to the specifications of the tow bundle roll, so as to adapt to tow bundle rolls of different sizes, ensuring the versatility and flexibility of the tow bundle roll winding and unwinding device.

[0048] Moreover, in this embodiment, a groove is provided at the connection position between the connection part 210 and the bearing part 220, and the first connecting member is arranged in this groove, thereby realizing the embedded structure of the first connecting member.

[0049] In this embodiment, the first limiting member 310 is a limiting wheel. The limiting wheel is embedded on the bearing shaft. The rotation direction of the limiting wheel is the same as the axial direction of the drive shaft 111, and the top surface of the limiting wheel protrudes from the axial surface of the bearing shaft. There are multiple limiting wheels, and the multiple limiting wheels are arranged at intervals along the circumferential direction of the bearing shaft.

[0050] Specifically, in this embodiment, an installation shaft perpendicular to the circumferential direction of the bearing shaft is provided in the groove, and the limiting wheel is arranged on the installation shaft, so that the rotation direction of the limiting wheel is the same as the axial direction of the drive shaft 111. In this structure, when the tow bundle roll moves along the bearing part 220 towards the connection part 210, the inner wall of the tow bundle roll abuts against the wheel surface of the limiting wheel, and the limiting wheel can rotate to reduce the friction between the tow bundle roll and the limiting wheel.

[0051] Moreover, in this embodiment, the multiple limiting wheels are arranged at intervals along the circumferential direction of the bearing shaft, and can form multi-point contact with the tow bundle roll to realize multi-point support for the tow bundle roll, and the tow bundle roll is more stable when passing through the drive shaft 111.

[0052] In this embodiment, the limiting component 300 further includes a limiting ring 330. The limiting ring 330 is sleeved on the end of the connection part 210 far away from the bearing part 220, and the side wall of the limiting ring 330 abuts against the side wall of the tow bundle roll.

[0053] Among them, the limiting ring 330 is arranged at one end of the connecting part 210 away from the bearing part 220. During the process of threading the tow bobbin onto the driving shaft 111, the limiting ring 330 can limit the tow bobbin. When the tow bobbin is installed in place, the side wall of the limiting ring 330 abuts against the side wall of the tow bobbin to prevent the tow bobbin from falling off the driving shaft 111.

[0054] In this embodiment, the driving assembly 100 further includes a mounting bracket 120. The mounting bracket 120 is used to connect with the yarn box frame, and the driving motor 110 is arranged on the mounting bracket 120. One side of the limiting ring 330 close to the driving motor 110 abuts against and slidably cooperates with the mounting bracket 120.

[0055] The mounting bracket 120 is used to mount the driving motor 110 into the yarn box frame of the automatic fiber placement machine, so as to realize the arrangement of the driving motor 110, the driving shaft 111 and the limiting assembly 300.

[0056] Moreover, in this embodiment, the end face of the limiting ring 330 on the side away from the tow bobbin abuts against and slidably cooperates with the mounting bracket 120, which can prevent the limiting ring 330 from falling off under the push of the tow bobbin and does not affect the rotation of the limiting ring 330 together with the driving shaft 111.

[0057] In this embodiment, the second limiting member 320 is a limiting seat. One end of the limiting seat has an access port, the access port is sleeved on one end of the bearing shaft away from the driving assembly 100, and an installation groove is arranged on the side wall of the limiting seat. The elastic limiting part includes an elastic reset member 321 and a limiting claw. The elastic reset member 321 is arranged in the limiting seat. The limiting claw is embedded in the installation groove and one end is rotatably connected with the limiting seat. The surface of the limiting claw facing the limiting seat abuts against the elastic reset member 321.

[0058] After the limiting claw abuts against the elastic reset member 321, when the tow bobbin is threaded onto the driving shaft 111, the inner wall of the tow bobbin presses down the limiting claw from the top of the limiting claw to compress the elastic reset member 321, so that the limiting claw rotates along the connection with the limiting seat, and the limiting claw is pressed into the installation groove by the inner wall of the tow bobbin, without affecting the installation of the tow bobbin.

[0059] Moreover, after the tow bobbin is completely threaded onto the driving shaft 111, the top of the limiting claw loses the pressure exerted by the inner wall of the tow bobbin, and the elastic reset member 321 undergoes a restorative deformation to push up the limiting claw, so that the limiting claw can automatically return to the position where it abuts against the side wall of the tow bobbin, realizing the limiting function of the tow bobbin.

[0060] In this embodiment, a reverse stop 324 is arranged on the side of the limiting claw close to the inside of the limiting seat. The reverse stop 324 is located in the limiting seat and the length of the reverse stop 324 is greater than the width of the installation groove to prevent the limiting claw from flipping out of the installation groove.

[0061] The anti-return member 324 is arranged in the limiting seat, and when there is no object on the top of the limiting claw to apply pressure to press the limiting claw into the installation slot, the limiting claw flips out of the installation slot under the restorative deformation of the elastic reset member 321. At this time, since the length of the anti-return member 324 is greater than the width of the installation slot, the anti-return member 324 can be stuck on the inner wall of the limiting seat when following the limiting claw to flip out of the installation slot, so as to prevent the limiting claw from flipping and rotating at too large an angle, causing the limiting claw to flip outward and fail to abut against the side wall of the tow roll.

[0062] In this embodiment, the surface of the limiting claw outside the limiting seat is a stepped structure, and the side surface of the stepped structure abuts against the side wall of the tow roll.

[0063] Specifically, the side surface of the step structure in this embodiment faces one end of the limit seat connected to the drive shaft 111, the part of the limit claw close to the drive shaft 111 is the press-in section 322, and the part of the limit claw away from the drive shaft 111 is the protruding section 323. The step structure is located at the connection between the press-in section 322 and the protruding section 323, and the end of the protruding section 323 away from the press-in section 322 is rotatably connected to the limit seat.

[0064] Among them, after the limit seat is connected to the driving shaft 111 and the tow roll is installed in place, there is no pressure above the limit claw. At this time, the elastic reset member 321 is in an extended state, the pressed section 322 is in the installation groove and abuts against the inner wall of the tow roll, and the top surface of the protruding section protrudes out of the installation groove. Under this structure, the side of the step structure abuts against the side wall of the tow roll to fix the position of the tow roll and will not fall off the driving shaft 111 in the direction of the limit seat.

[0065] In addition, when removing or installing the tow roll, the limit claw is pressed to rotate the limit claw until the protruding section 323 is retracted into the installation groove. During this process, the elastic reset member 321 is gradually compressed to store potential energy, and the stepped structure and the protruding section both enter the installation groove. The tow roll can move on the limit seat to facilitate the installation and removal of the tow roll.

[0066] In this embodiment, the bearing assembly 200 further includes a core shaft 230. A support frame 325 is provided in the limiting seat, and a plug hole is provided on the support frame 325. The core shaft 230 is provided in the bearing shaft, one end of the core shaft 230 is transmission-connected to the driving shaft 111, and the other end is inserted into the plug hole.

[0067] Specifically, the core shaft 230 in this embodiment is arranged in the load-bearing shaft and plugged into the support frame 325 in the limit seat, and together with the drive shaft 111, it realizes the bearing of the limit seat, which not only further enhances the structural stability of the load-bearing shaft, but also ensures the high efficiency and accuracy of power transmission by directly connecting with the drive shaft 111.

[0068] It should be noted that, in this embodiment, the limiting seat and the bearing shaft are interference fit.

[0069] The interference fit results in a very tight contact between the limit seat and the bearing shaft, eliminating any possible gaps. During the operation of the device, even if it is subjected to vibration or impact, the limit seat will not loosen easily, ensuring the stability of the connection.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tow material roll taking-up and unwinding device, characterized in that: The feeding mechanism used in the automatic wire laying machine includes: A driving assembly (100) comprises a driving motor (110), wherein the driving motor (110) is arranged in a yarn box frame, and the driving motor (110) has a driving shaft (111); A bearing assembly (200) comprises a bearing shaft, the bearing shaft being in driving connection with the driving shaft (111) and used for passing through the tow roll and bearing the tow roll; A limiting assembly (300) comprises a first limiting member (310) and a second limiting member (320), wherein the first limiting member (310) is arranged at one end of the load-bearing shaft close to the driving shaft (111), the top surface of the first limiting member (310) protrudes from the outer wall of the load-bearing shaft and is used to abut against the inner wall of the tow roll, and the second limiting member (320) is arranged at one end of the load-bearing shaft away from the driving assembly (100), the second limiting member (320) has an elastic limiting portion, the top surface of the elastic limiting portion protrudes from the outer wall of the load-bearing shaft and is used to abut against the end of the tow roll; The driving shaft (111) comprises a connecting portion (210) and a bearing portion (220); One end of the connecting portion (210) is drivingly connected to the driving shaft (111); One end of the bearing portion (220) is connected to the other end of the connecting portion (210), and the other end of the bearing portion (220) is connected to the second limiting member (320); The first limiting member (310) is arranged at the connection between the connecting portion (210) and the bearing portion (220); The first limiting member (310) is a limiting wheel; The limiting wheel is embedded in the bearing shaft, the rotation direction of the limiting wheel is the same as the axial direction of the driving shaft (111), and the top surface of the limiting wheel protrudes from the axial surface of the bearing shaft; There are a plurality of the limiting wheels, and the plurality of limiting wheels are arranged at intervals along the circumference of the bearing shaft.

2. The tow material roll taking-up and unwinding device according to claim 1, characterized in that: The limiting assembly (300) further comprises a limiting ring (330); The limiting ring (330) is sleeved on an end of the connecting portion (210) away from the bearing portion (220), and the side wall of the limiting ring (330) is in contact with the side wall of the tow roll.

3. The tow material roll taking-up and unwinding device according to claim 2, characterized in that: The drive assembly (100) further comprises a mounting frame (120); The mounting frame (120) is used to be connected to the yarn box frame, and the driving motor (110) is arranged on the mounting frame (120); A surface of the limiting ring (330) close to the driving motor (110) abuts against and slidably engages with the mounting frame (120).

4. The tow material roll taking-up and unwinding device according to claim 1, characterized in that: The second limiting member (320) is a limiting seat; One end of the limit seat has an access port, the access port is sleeved on an end of the bearing shaft away from the driving assembly (100), and a mounting groove is provided on the side wall of the limit seat; The elastic limiting part includes an elastic reset member (321) and a limiting claw. The elastic reset member (321) is arranged in the limiting seat. The limiting claw is embedded in the installation groove and one end thereof is rotatably connected to the limiting seat. One side of the limiting claw facing the limiting seat abuts against the elastic reset member (321).

5. The tow bobbin winding and unwinding device according to claim 4, characterized in that A reverse prevention member (324) is provided on one side of the limiting claw close to the inside of the limiting seat; The reverse prevention member (324) is located in the limiting seat and the length of the reverse prevention member (324) is greater than the width of the installation groove to prevent the limiting claw from flipping out of the installation groove.

6. The tow bobbin winding and unwinding device according to claim 5, characterized in that The surface of the limiting claw located outside the limiting seat is a stepped structure; The side surface of the stepped structure abuts against the side wall of the tow bobbin.

7. The tow bobbin winding and unwinding device according to claim 4, characterized in that The bearing assembly (200) further includes a core shaft (230); A support frame (325) is arranged in the limiting seat, and a jack is provided on the support frame (325); The core shaft (230) is arranged in the bearing shaft, one end of the core shaft (230) is in transmission connection with the drive shaft (111), and the other end is inserted into the jack.

8. The tow bobbin winding and unwinding device according to claim 4, characterized in that The limiting seat and the bearing shaft are in interference fit.

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