Tow material roll winding and unwinding device

Abstract

The invention provides a tow material roll winding and unwinding device applied to a feeding mechanism of an automatic tow placement machine, and relates to the technical field of aerospace material production equipment, in particular to a driving assembly, a bearing assembly and a limiting assembly; the bearing shaft penetrates into a tow roll to contain the tow roll, the driving motor drives the bearing shaft to rotate through the driving shaft, transmission connection of the tow roll is achieved, accordingly, the discharging speed and the strip tension are accurately controlled, constant laying tension and stable discharging speed are guaranteed, the top face of the first limiting piece abuts against the tow roll, and the feeding speed of the tow roll is increased. The elastic limiting part of the second limiting piece abuts against the end of the tow roll, the tow roll is prevented from loosening or shifting in the discharging process, when the tow roll needs to be disassembled, the elastic limiting part can be pressed to enable the top face of the tow roll to be shrunk to be flush with the surface of the bearing shaft, then the tow roll is pulled out to complete disassembling, the disassembling process is simple, consumed time is short, and the disassembling efficiency is high. And the production downtime in the replacement process can be shortened, so that the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace material production equipment, and in particular to a tow material roll taking-up and unwinding device. Background Art

[0002] Composite materials have been increasingly widely used in many industrial fields due to their advantages such as light weight, high strength, high modulus, fatigue resistance, corrosion resistance, designability and good process performance. They are especially suitable for large structures and integral structures and are ideal aviation structural materials. With the increasing size of aircraft, the structural size of composite components used in aircraft is increasing, and the amount is also increasing. The automatic wire laying technology used to manufacture large and complex composite components has been rapidly developed and industrialized.

[0003] During the laying process of the composite material automatic fiber placement machine, the final performance of the material is very sensitive to the molding process, and the final performance is also given to the structural parts through the molding process, so the molding process parameters determine the performance and quality of the composite material structure. Laying tension and unloading speed are important parameters of the fiber placement molding process, which have an important influence on the mechanical properties, density and glue content of the laid products.

[0004] The existing wire laying head unloading device cannot accurately control the unloading speed and the tension of the material during the unloading process, which will lead to loose material strips. In addition, the existing device is cumbersome to replace the material roll, and it is necessary to manually disassemble and install multiple parts, which is time-consuming and requires high operating skills. The production downtime during the replacement process is 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 take-up and unwinding device to alleviate the technical problems in the prior art that the wire laying head unwinding device cannot accurately control the unwinding speed and the material tension during the unwinding process, and the process of replacing the material reel 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] Furthermore, a backstop is provided on one side of the limit claw close to the limit seat; the backstop is located in the limit seat and the length of the backstop is greater than the width of the mounting groove to prevent the limit claw from flipping out of the mounting groove.

[0013] Furthermore, the surface of the limiting claw located 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.

[0014] Furthermore, the bearing assembly also includes a core shaft; a support frame is provided in the limit seat, and a socket is provided on the support frame; the core shaft is provided in the bearing shaft, one end of the core shaft is transmission-connected to the drive shaft, and the other end is inserted into the socket.

[0015] Furthermore, the limiting seat and the bearing shaft are interference fit.

[0016] Beneficial effects: The yarn bundle material roll reel-taking-up device provided by the present invention is applied to the feeding mechanism of the automatic yarn laying machine, and specifically comprises: a driving assembly, a bearing assembly and a limiting assembly; the driving assembly comprises a driving motor, which is arranged in the yarn box frame, and the driving motor has a driving shaft; the bearing assembly comprises a bearing shaft, which is transmission-connected with the driving shaft and is used to penetrate the yarn bundle roll and carry the yarn; 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 roll, 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.

[0017] Specifically, in the present embodiment, the bearing shaft is inserted into the roll of the tow roll to hold the tow roll, and the driving motor is arranged in the yarn box frame of the automatic wire laying machine. The driving motor drives the bearing shaft to rotate through its driving shaft to realize the transmission connection of the tow roll, thereby accurately controlling the discharge speed and the tension of the material, ensuring a constant laying tension and a stable discharge speed, and improving the quality and performance of the product. Moreover, the design of the bearing shaft can adapt to tow rolls of different sizes, ensuring the versatility and flexibility of the equipment. In addition, after the top surface of the first limit member abuts against the tow roll, it can prevent the tow roll from sliding or shifting on the bearing shaft, ensuring that its position is fixed. The elastic limiting portion of the second limit member abuts against the end of the tow roll to prevent the tow roll from loosening or shifting during the discharge process. When the tow roll needs to be disassembled, the elastic limiting portion can be pressed to shrink its top surface to be flush with the surface of the bearing shaft, and then the tow roll is pulled out to complete the disassembly. The disassembly process is simple and time-saving, which can reduce the production downtime during the replacement process, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a tow material roll reeling and unreeling device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the matching relationship between the yarn tow roll reeling and unreeling device and the yarn tow roll provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a driving assembly in a tow material roll reeling and unreeling device provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a load-bearing assembly in a tow material roll reeling and unwinding device provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a second position-limiting member in a tow material roll reeling and unreeling device provided in an embodiment of the present invention; Figure 6 A side structural sectional view of a second limiting member in a tow material roll reeling and unwinding device provided in an embodiment of the present invention.

[0020] icon: 100-driving assembly; 110-driving motor; 111-driving shaft; 120-mounting frame; 200-bearing assembly; 210-connecting portion; 220-bearing portion; 230-core shaft; 300-limiting assembly; 310-first limiting member; 320-second limiting member; 321-elastic reset member; 322-pressing section; 323-protruding section; 324-anti-return member; 325-support frame; 330-limiting ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0028] like Figures 1 to 6 As shown, the yarn bundle reel reeling and unwinding device provided in this embodiment is applied to the feeding mechanism of an automatic yarn laying machine, and specifically includes a driving assembly 100, a bearing assembly 200 and a limiting assembly 300.

[0029] The driving assembly 100 includes a driving motor 110, which is arranged in the yarn box frame and has a driving shaft 111. The bearing assembly 200 includes a bearing shaft, which is connected to the driving shaft 111 and is used to penetrate the yarn roll and carry the yarn. 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, and 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 yarn roll. The second limiting member 320 is arranged at one end of the bearing shaft away from the driving assembly 100, and 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 yarn roll.

[0030] Specifically, in the present embodiment, the bearing shaft is passed through the yarn bundle roll to hold the yarn bundle roll, and the driving motor 110 is disposed in the yarn box frame of the automatic yarn laying machine.

[0031] The driving motor 110 drives the bearing shaft to rotate through its driving shaft 111 to realize the transmission connection of the tow roll, thereby accurately controlling the unwinding speed and the belt tension, ensuring a constant laying tension and a stable unwinding speed, and improving the quality and performance of the product.

[0032] In addition, the design of the load-bearing shaft can adapt to tow rolls of different sizes, ensuring the versatility and flexibility of the equipment.

[0033] In addition, after the top surface of the first stopper 310 abuts against the tow roll, the tow roll can be prevented from sliding or shifting on the bearing shaft, ensuring that its position is fixed. The elastic stopper of the second stopper 320 abuts against the end of the tow roll to prevent the tow roll from loosening or shifting during the unwinding process.

[0034] When the tow roll needs to be disassembled, the elastic limiting portion can be pressed to shrink its top surface to be flush with the surface of the load-bearing shaft, and then the tow roll can be pulled out along the axial direction of the load-bearing shaft to disassemble the tow roll.

[0035] Similarly, when installing the tow roll, the inner cylinder of the tow roll can be aligned with the load-bearing shaft and pushed in along the axial direction of the load-bearing shaft, so that the inner wall of the tow roll compresses the elastic limiting part, so that the tow roll can be loaded onto the load-bearing shaft. When the tow roll is installed in place, the end of the tow roll is separated from the top surface of the elastic limiting part, and the elastic limiting part recovers its deformation under the action of elasticity and abuts against the end surface of the tow roll to limit the tow roll. The disassembly and assembly operation is simple and time-saving, which can reduce the production downtime during the replacement process, thereby improving production efficiency.

[0036] In this embodiment, the driving shaft 111 includes 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 stopper 320. The first stopper 310 is provided at the connection between the connecting portion 210 and the bearing portion 220.

[0037] Specifically, one end of the connecting portion 210 in this embodiment is transmission-connected to the driving shaft 111 , thereby driving the bearing portion 220 connected to the other end of the connecting portion 210 to rotate together, thereby realizing the rotational discharge of the tow roll carried by the bearing portion 220 .

[0038] The specific size of the bearing portion 220 can be changed according to the specifications of the tow roll, so as to adapt to tow rolls of different sizes, thereby ensuring the versatility and flexibility of the tow roll reeling and unwinding device.

[0039] Furthermore, in this embodiment, a groove is provided at the connection between the connecting portion 210 and the bearing portion 220 , and the first connecting member is disposed in the groove, thereby realizing an embedded structure of the first connecting member.

[0040] 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 driving 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 circumference of the bearing shaft.

[0041] Specifically, a mounting shaft perpendicular to the circumferential direction of the bearing shaft is provided in the groove in this embodiment, and the limiting wheel is provided on the mounting shaft so that the rotation direction of the limiting wheel is the same as the axial direction of the driving shaft 111. Under this structure, when the tow roll moves along the bearing portion 220 toward the connecting portion 210, the inner wall of the tow roll abuts against the wheel surface of the limiting wheel, and the limiting wheel can rotate to reduce the friction between the tow roll and the limiting wheel.

[0042] Furthermore, in this embodiment, a plurality of limiting wheels are arranged at circumferential intervals on the load-bearing shaft, which can form multi-point contact with the tow roll to achieve multi-point support for the tow roll, and the tow roll is more stably supported when it is passed through the drive shaft 111.

[0043] In this embodiment, the limiting assembly 300 further includes a limiting ring 330. The limiting ring 330 is sleeved on one end of the connecting portion 210 away from the bearing portion 220, and the side wall of the limiting ring 330 abuts against the side wall of the tow roll.

[0044] The limiting ring 330 is disposed at one end of the connecting portion 210 away from the bearing portion 220, and the limiting ring 330 can limit the position of the tow roll when the tow roll is passed through the driving shaft 111. When the tow roll is installed in place, the side wall of the limiting ring 330 abuts against the side wall of the tow roll to prevent the tow roll from falling off the driving shaft 111.

[0045] In this embodiment, the driving assembly 100 further includes a mounting frame 120. The mounting frame 120 is used to be connected to the yarn box frame, and the driving motor 110 is disposed on the mounting frame 120. A surface of the limiting ring 330 close to the driving motor 110 abuts against and slidably cooperates with the mounting frame 120.

[0046] The mounting frame 120 is used to install the driving motor 110 into the yarn box frame of the automatic yarn placing machine, so as to realize the arrangement of the driving motor 110 , the driving shaft 111 and the limiting assembly 300 .

[0047] Moreover, in this embodiment, the end face of the limiting ring 330 away from the filament roll abuts against and slides with the mounting frame 120, which can prevent the limiting ring 330 from falling off under the push of the filament roll and does not affect the limiting ring 330 from rotating with the driving shaft 111.

[0048] In this embodiment, the second limiting member 320 is a limiting seat. One end of the limiting seat has an access port, which is sleeved on the end of the bearing shaft away from the driving assembly 100, and a mounting groove is provided 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 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 321.

[0049] After the limiting claw abuts against the elastic reset member 321, when the tow roll is inserted onto the driving shaft 111, the inner wall of the tow roll presses the limiting claw from the top 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 roll, which does not affect the installation of the tow roll.

[0050] Furthermore, after the tow roll is completely passed through the drive shaft 111, the top of the limiting claw loses the pressure exerted by the inner wall of the tow roll, and the elastic reset member 321 undergoes restorative deformation to lift up the limiting claw, so that the limiting claw can automatically return to the position abutting against the side wall of the tow roll, thereby realizing the limiting function of the tow roll.

[0051] In this embodiment, a side of the limit claw close to the limit seat is provided with a backstop 324. The backstop 324 is located in the limit seat and the length of the backstop 324 is greater than the width of the installation slot to prevent the limit claw from flipping out of the installation slot.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] It should be noted that, in this embodiment, the limiting seat and the bearing shaft are interference fit.

[0060] The interference fit creates a very close contact between the limit seat and the load-bearing shaft, eliminating any possible gap. Even if the equipment is subjected to vibration or impact during operation, the limit seat will not loosen easily, ensuring the stability of the connection.

[0061] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, 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; The 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 filament 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 filament roll.

2. The tow material roll taking-up and unwinding device according to claim 1, characterized in that: 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).

3. The tow material roll taking-up and unwinding device according to claim 2, characterized in that: 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.

4. The tow material roll taking-up and unwinding device according to claim 2, 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.

5. The tow material roll taking-up and unwinding device according to claim 4, 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).

6. 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 portion comprises an elastic reset member (321) and a limit claw. The elastic reset member (321) is arranged in the limit seat. The limit claw is embedded in the installation groove and one end is rotatably connected to the limit seat. The limit claw has a side facing the limit seat abutting against the elastic reset member (321).

7. The tow material roll taking-up and unwinding device according to claim 6, characterized in that: A backstop (324) is provided on one side of the limiting claw close to the limiting seat; The anti-return member (324) is located in the limiting seat and the length of the anti-return member (324) is greater than the width of the installation slot, so as to prevent the limiting claw from flipping out of the installation slot.

8. The tow material roll taking-up and unwinding device according to claim 7, characterized in that: The surface of the limiting claw located outside the limiting seat is a stepped structure; The side surfaces of the step structure abut against the side walls of the tow roll.

9. The tow material roll taking-up and unwinding device according to claim 6, characterized in that: The bearing assembly (200) further comprises 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 arranged 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 insertion hole.

10. The tow material roll taking-up and unwinding device according to claim 6, characterized in that: The limiting seat is interference fit with the bearing shaft.

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