A limiting mechanism for automatically adjusting the size of a creel and a yarn winding device

Abstract

The application provides a limiting mechanism for automatically adjusting the size of a yarn frame and a yarn winding device, comprising a main shaft, a yarn frame adjusting assembly, a shaft end driving assembly, a shaft end limiting assembly and a sliding base assembly, wherein the yarn frame adjusting assembly comprises a lead screw, the shaft end driving assembly is connected with a first limiting groove at the second end of the lead screw, is used to drive the yarn frame adjusting assembly to adjust the diameter size of the yarn frame, the shaft end limiting assembly is connected with a second limiting groove at the second end of the lead screw, is used to lock the adjusted diameter size of the yarn frame, and the sliding base assembly is fixedly connected with the shaft end driving assembly and the shaft end limiting assembly, is used to drive the shaft end driving assembly and the shaft end limiting assembly to be connected with or separated from the first limiting groove or the second limiting groove of the lead screw, and the double requirements of the full-automatic yarn winding device for the stability of the yarn frame and the automatic adjustment of the size of the yarn frame are met.

Description

Technical Field

[0001] This application relates to the field of yarn winding device technology, and in particular to a limiting mechanism for automatically adjusting the size of the yarn frame and a yarn winding device. Background Technology

[0002] In traditional yarn winding processes, the yarn frame, as a key forming component, directly affects the quality of the skein and the adaptability of the process through precise adjustment of its circumference. Currently, the commonly used manual adjustment of the yarn frame length is not only inefficient but also cumbersome and time-consuming. To address this issue, the industry often employs a screw-driven adjustable yarn frame mechanism. This mechanism uses a handwheel to drive the screw rotation, achieving mechanical adjustment of the frame spacing and relying on the self-locking characteristics of the threaded joint to maintain its working state. However, under long-term cyclic loads, the screw threads are prone to wear, leading to increased transmission clearance. Simultaneously, under high-speed operation or mechanical vibration conditions, the reliability of the thread self-locking decreases sharply, often resulting in axial movement. This not only causes poor yarn frame positioning accuracy but also triggers quality problems such as yarn tension fluctuations and interlayer misalignment, severely impacting the consistency of textile products.

[0003] In a fully automatic yarn winch machine, a device that automatically adjusts the size of the yarn frame is required; otherwise, the automatic yarn dropping action cannot be achieved.

[0004] Therefore, it is necessary to develop a limiting mechanism with high rigidity locking function, and this mechanism must be suitable for installation in the rotating yarn frame spindle to meet the dual requirements of fully automatic yarn winding device for yarn frame stability and automatic adjustment of yarn frame size. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a limiting mechanism and a yarn winding device for automatically adjusting the size of the yarn frame. By automatically adjusting the size of the yarn frame and automatically limiting the size of the yarn frame, the requirement for automatic yarn unwinding by the yarn winding device is met.

[0006] In a first aspect, this application provides a limiting mechanism for automatically adjusting the size of a yarn frame, comprising: a main shaft, a yarn frame adjusting assembly, a shaft end driving assembly, a shaft end limiting assembly, and a sliding base assembly;

[0007] The main shaft is tubular and has an internal cavity;

[0008] The yarn frame adjustment assembly includes a lead screw, which is axially disposed in the cavity of the main shaft, with its first end rotatably connected to the inner wall of the cavity of the main shaft and its second end extending to the outer side of the end of the main shaft.

[0009] The shaft end drive assembly engages with the first limiting groove at the second end of the lead screw, and is used to drive the yarn frame adjustment assembly to adjust the yarn frame diameter.

[0010] The shaft end limiting component engages with the second limiting groove at the second end of the lead screw to lock the adjusted yarn frame diameter.

[0011] The sliding base assembly is fixedly connected to the shaft end drive assembly and the shaft end limiting assembly, and is used for engaging or disengaging the shaft end drive assembly and the shaft end limiting assembly with the first limiting groove or the second limiting groove at the second end of the lead screw.

[0012] In some embodiments, the yarn frame adjustment assembly further includes multiple frame rods and multiple telescopic rods, the multiple telescopic rods being distributed circumferentially along the main shaft, with one end hinged to the lead screw or the main shaft and the other end hinged to the multiple frame rods.

[0013] In some embodiments, the shaft end drive assembly includes a first motor and a shaft end seat. The first motor and the shaft end seat are fixedly mounted on the sliding base assembly. The first motor and the shaft end seat are connected in a transmission manner. The shaft end seat includes a rotating shaft, which is engaged with a first limiting groove at the second end of the lead screw.

[0014] In some embodiments, the shaft end limiting assembly includes a stop, a reset, and a pusher. One end of the stop is hinged to one end of the reset, the first end of the stop is engaged with the second limiting groove of the lead screw, the second end of the stop slides against the pusher, the other end of the reset is fixedly connected to the main shaft, and the pusher is fixedly connected to the sliding base assembly.

[0015] In some embodiments, the pushing member includes an arc-shaped abutting surface, which slides against the second end of the stop member.

[0016] In some embodiments, the stop is S-shaped.

[0017] In some embodiments, the other end of the reset member is provided with a mounting groove adapted to the spindle.

[0018] In some embodiments, the second end of the lead screw is fitted with a limiting seat, and the side wall of the limiting seat has a plurality of second limiting grooves evenly distributed circumferentially to engage with the first end of the stop member.

[0019] In some embodiments, the sliding base assembly includes a slide table and a slide table drive cylinder, the slide table and the slide table drive cylinder being connected.

[0020] Secondly, the yarn winding device provided in this application includes: a main shaft driver and the adjustable yarn frame limiting mechanism described in the first aspect, wherein the main shaft driver is connected to the main shaft drive.

[0021] The beneficial effects that this application can achieve are:

[0022] The method provided in this application involves a sliding base assembly fixedly connected to a shaft end drive assembly and a shaft end limiting assembly. This assembly drives the shaft end drive assembly and the shaft end limiting assembly to engage or disengage with the first or second limiting groove of the lead screw. This achieves the following: when the shaft end limiting assembly disengages from the second limiting groove of the lead screw, the shaft end drive assembly engages with the first limiting groove of the lead screw to drive the yarn frame adjustment assembly to extend and retract, thereby adjusting the yarn frame diameter. When the shaft end drive assembly disengages from the first limiting groove of the lead screw, the shaft end limiting assembly engages with the second limiting groove of the lead screw, effectively locking the position of the yarn frame adjustment assembly and maintaining the adjusted yarn frame diameter.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the limiting mechanism for automatically adjusting the size of the yarn frame according to this application is shown;

[0026] Figure 2 A partial schematic diagram of the yarn frame adjustment assembly of this application is shown;

[0027] Figure 3 A schematic diagram of the shaft end drive assembly and shaft end limiting assembly of this application is shown;

[0028] Figure 4 A schematic diagram of the shaft end limiting assembly of this application is shown;

[0029] Figure 5 A schematic diagram of the limiting seat of this application is shown.

[0030] 001. Main shaft; 101. First fixing ring; 102. Second fixing ring; 103. Guide elongated hole; 002. Yarn frame adjustment assembly; 201. Lead screw; 202. Frame rod; 203. Telescopic rod; 204. Limiting seat; 2041. First limiting groove; 2042. Second limiting groove; 2031. Main telescopic rod; 2032. Secondary telescopic rod; 003. Shaft end drive assembly; 301. First motor; 302. Shaft end seat; 3021. Rotating shaft; 3022. Rotating component; 004. Shaft end limiting assembly; 401. Stop component; 402. Reset component; 4021. Mounting groove; 403. Pushing component; 005. Sliding base assembly; 501. Slide table; 502. Slide table drive cylinder; 006. Main shaft driver. Detailed Implementation

[0031] The term "comprising" in the specification, claims, and accompanying drawings of this application is synonymous with "including," "containing," or "characterized in," and is inclusive of endpoints or open-ended, and does not exclude additional unstated elements or method steps. "Comprising" is a technical term used in the language of the claims, meaning that the stated element is present, but other elements may be added and still form a construction or method within the scope of the claims.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In traditional yarn winding processes, fixed-size yarn frames are difficult to adapt to the radial dimension requirements of different processes. Existing adjustable yarn frame mechanisms typically employ a screw drive system, where a handwheel drives the screw to rotate, which in turn drives the yarn frame adjustment mechanism to change the frame spacing, relying on thread self-locking to prevent slippage. However, after long-term operation, the screw thread is prone to self-locking failure due to vibration or friction, resulting in unstable adjustable yarn frame positioning and affecting the quality of yarn winding. Therefore, this application proposes an automatic yarn frame size adjustment limiting mechanism and a winding device to improve operational stability.

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] like Figure 1 , 4 As shown in Figure 5, an automatic yarn frame size adjustment limiting mechanism provided in this application includes: a main shaft 001, a yarn frame adjustment assembly 002, a shaft end drive assembly 003, a shaft end limiting assembly 004, and a sliding base assembly 005; the main shaft 001 is tubular and has an internal cavity; the yarn frame adjustment assembly 002 includes a lead screw 201, which is axially disposed in the cavity of the main shaft 001, and its first end is rotatably connected to the inner wall of the cavity of the main shaft 001, and its second end extends to the outer side of the end of the main shaft 001; the shaft end drive assembly 003 is connected to the lead screw... The first limiting groove 2041 at the second end of the screw 201 engages with the yarn frame adjusting assembly 002 to adjust the yarn frame diameter. The shaft end limiting assembly 004 engages with the second limiting groove 2042 at the second end of the screw 201 to lock the adjusted yarn frame diameter. The sliding base assembly 005 is fixedly connected to the shaft end driving assembly 003 and the shaft end limiting assembly 004 to drive the shaft end driving assembly 003 and the shaft end limiting assembly 004 to engage or disengage with the first limiting groove 2041 or the second limiting groove 2042 at the second end of the screw.

[0037] Specifically, the main shaft 001 has a cavity, and the lead screw 201 is inserted into the cavity. The first end of the lead screw 201 is rotatably connected to the inside of the cavity, while the second end protrudes from the cavity. The top of the second end of the lead screw 201 has a first limiting groove 2041, and the side wall has a second limiting groove 2042. The shaft end drive assembly 003 includes a shaft end seat 302, which has a rotating shaft 3021 that engages with the first limiting groove 2041. The shaft end drive assembly 003 can drive the lead screw 201 to rotate, thereby driving the yarn frame adjustment assembly 002 to adjust the yarn frame diameter. The shaft end limiting assembly 004 includes a stop 401, which engages with the second limiting groove 2042, preventing the lead screw 201 from rotating under the action of the shaft end limiting assembly 004.

[0038] The working process is as follows: When the sliding base assembly 005 drives the shaft end drive assembly 003 and the shaft end limit assembly 004 to approach the yarn frame, the rotating shaft 3021 of the shaft end drive assembly 003 engages with the first limit groove 2041 at the second end of the lead screw 201, and the stop 401 of the shaft end limit assembly 004 separates from the second limit groove 2042 at the second end of the lead screw 201. At this time, the shaft end drive assembly 003 can drive the yarn frame adjustment assembly 002 to perform telescopic movement, thereby increasing or decreasing the diameter of the yarn frame. When the diameter of the yarn frame reaches the required size, the sliding base assembly 005 returns to the initial position. At this time, the rotating shaft 3021 separates from the first limit groove 2041 at the second end of the lead screw 201, and the shaft end limit assembly 004 engages with the second limit groove 2042 at the second end of the lead screw 01, so that the adjusted diameter of the yarn frame is maintained.

[0039] In this embodiment of the application, the yarn frame adjustment assembly 002 further includes multiple frame rods 202 and multiple telescopic rods 203. The multiple telescopic rods 203 are distributed circumferentially along the main shaft 001, and one end is hinged to the lead screw 201 and the main shaft 001, and the other end is hinged to the multiple frame rods 202.

[0040] Specifically, such as Figure 2 As shown, the telescopic rod 203 includes a secondary telescopic rod 2031 and a main telescopic rod 2032. The length of the secondary telescopic rod 2031 is less than the length of the main telescopic rod 2032. The two are connected by a hinge and form an included angle. A first annular seat 205 is movably sleeved on the main shaft 001, and a second annular seat 206 is fixedly sleeved on it. Multiple main telescopic rods 2032 are hinged to the first annular seat 205, and multiple secondary telescopic rods 2031 are hinged to the second annular seat 206. A guide elongated hole 103 is also provided on the main shaft 001. A connecting nut is installed on the lead screw 201. The connecting nut passes through the guide elongated hole 103 and connects to the first annular seat 205. When the shaft end drive assembly 003 drives the lead screw 201 to rotate, the connecting nut on the lead screw 201 moves axially within the guide elongated hole 103, causing the first annular seat 205 to move on the main shaft 001, thereby increasing or decreasing the angle between the multiple auxiliary telescopic rods 2031 and the main telescopic rod 2032, pushing or pulling the frame rod 202 closer to or away from the main shaft 001, thus increasing or decreasing the diameter of the yarn frame.

[0041] In the embodiments of this application, such as Figures 3-5 As shown, the shaft end drive assembly 003 includes a first motor 301 and a shaft end seat 302. The first motor 301 and the shaft end seat 302 are fixedly mounted on the sliding base assembly 005. The first motor 301 and the shaft end seat 302 are connected in a transmission manner. The shaft end seat 302 includes a rotating shaft 3021, which is engaged with the first limiting groove 2041 at the second end of the lead screw 201.

[0042] Specifically, the first motor 301 is an absolute servo motor. The first motor 301 and the shaft end seat 302 transmit power through a transmission mechanism and are fixedly connected to the sliding base assembly 005. The shaft end seat 302 includes a rotating shaft 3021 and a rotating component 3022. The rotating component 3022 is fixedly sleeved on the rotating shaft 3021 and can drive the rotating shaft 3021 to rotate. The rotating shaft 3021 is engaged with the first limiting groove 2041 at the second end of the lead screw 201. The first motor 301 acts on the rotating component 3022 through the transmission structure, causing the rotating shaft 3021 to drive the lead screw 201 to rotate, thereby adjusting the diameter of the yarn frame. The transmission mechanism can be a gear set or a synchronous belt.

[0043] In this embodiment, the shaft end limiting assembly 004 includes a stop member 401, a reset member 402, and a push member 403. The stop member 401 and the reset member 402 are hinged together. The first end of the stop member 401 is engaged with the second limiting groove 2042 of the lead screw 201, and the second end is slidably engaged with the push member 403. The reset member 402 is fixedly connected to the main shaft 001, and the push member 403 is fixedly connected to the sliding base assembly 005.

[0044] Specifically, the center point of the stop 401 and the reset 402 are hinged by a pin to form a lever structure. A pre-tension spring is provided at the hinge of the reset 402. Under the pre-tension force of the spring, the first end of the stop 401 is stably inserted into the second limiting groove 2042 at the second end of the lead screw 201, which can stably limit the circumferential rotation of the yarn frame adjusting assembly 002. At the same time, the pre-tension spring can restore the first end of the stop 401 to its original position after separating from the second limiting groove 2042 of the lead screw 201, ensuring the second accurate engagement of the stop 401 with the second limiting groove 2042. The reset 402 is locked to the main shaft 001 by bolts.

[0045] The specific working process is as follows: When the sliding base assembly 005 moves towards the yarn frame, it drives the pusher 403 to push the stop 401, causing the stop 401 to rotate around the hinge point. The first end of the stop 401 disengages from the second limiting groove 2042 of the lead screw 201, releasing the locking state of the yarn frame adjusting assembly 002. When the sliding base assembly 005 retracts, the pusher 403 retracts, and the stop 401 automatically resets under the elastic force of the pre-tension spring. The first end of the stop 401 re-engages with the second limiting groove 2042 of the lead screw 201, restoring the restriction on the circumferential rotation of the yarn frame adjusting assembly 002.

[0046] In a further embodiment, the pushing member 403 includes an arc-shaped abutting surface, which slides against the second end of the stop member 401.

[0047] The arc-shaped contact surface of the pusher 403 can convert the axial translation of the sliding base assembly 005 into the lever movement of the stop 401.

[0048] In a further embodiment, the stop 401 is S-shaped.

[0049] The S-shaped stop 401 extends the lever arm within a limited space through a double-bend structure, increasing the unlocking torque. However, the shape of the stop 401 is not limited to S-shape; any shape that can enable the stop 401 to generate a lever effect is within the protection range.

[0050] In some embodiments, the end of the reset member 402 is provided with a mounting groove 4021 that is adapted to the spindle 001.

[0051] The mounting groove 4021 of the reset component 402 adopts an arc-shaped clamp structure, with its inner wall conforming to the outer arc surface of the spindle 001. In order to further reduce the impact of the vibration of the spindle 001 on the shaft end limiting component 004, a rubber damping pad can be added to the inner wall of the mounting groove 4021.

[0052] In this embodiment of the application, as shown in FIG5, the second end of the lead screw 201 is fitted with a limiting seat 204, and the side wall of the limiting seat 204 has a plurality of first limiting grooves 2041 evenly distributed around it, which are engaged with one end of the stop member 401.

[0053] Specifically, when it is inconvenient to set a limiting groove on the diameter of the lead screw 201, a limiting seat 204 is fixedly sleeved on the second end of the lead screw 201. A first limiting groove 2041 and a second limiting groove 2042 are set on the limiting seat 204. The circumferential spacing of the second limiting groove 2042 depends on the adjustment accuracy requirements. The smaller the spacing, the more precise the adjustment of the yarn frame diameter can be achieved. In addition, the outline shape of the second limiting groove 2042 should match the first end of the stop 401 to avoid slippage.

[0054] In this embodiment of the application, the sliding base assembly 005 includes a slide table 501 and a slide table drive cylinder 502, and the slide table 501 and the slide table drive cylinder 502 are connected.

[0055] The slide table 501 is rigidly connected to the piston rod of the slide table drive cylinder 502. Driven by the slide table drive cylinder 502, the slide table 501 can perform linear motion, driving the shaft end drive assembly 003 and shaft end limit assembly 004 fixed on it to move synchronously, realizing the engagement or disengagement of the shaft end drive assembly 003 and shaft end limit assembly 004 with the lead screw 201. The slide table drive cylinder 502 can be replaced by other linear drive mechanisms.

[0056] A yarn winding device includes: a main shaft driver 006 and an adjustable yarn frame limiting mechanism as described in the first aspect, wherein the main shaft driver 006 is drively connected to the main shaft 001.

[0057] The spindle driver 006 uses a motor, which is connected to the spindle 001 via a synchronous belt to provide rotational power. When the equipment starts, the slide drive cylinder 502 in the sliding base assembly 005 first pushes the slide 501 to move linearly along the axial direction. The movement of the slide 501 drives the shaft end seat 302 fixed on it. The rotating shaft 3021 of the shaft end seat 302 engages with the first limiting groove 2041 at the second end of the lead screw 201. At the same time, it drives the pusher 403 in the shaft end limiting assembly 004 to push the stop 401, so that its first end separates from the second limiting groove 2042 at the second end of the lead screw 201, thus releasing the lock on the circumferential movement of the lead screw 201. After the shaft end drive assembly 003 engages with the lead screw 201, the first motor 301 drives the lead screw 201 to rotate via the rotating shaft 3021 of the shaft end seat 302. The rotation of the lead screw 201 drives the yarn frame adjustment assembly 002 to extend and retract, adjusting the diameter of the yarn frame to meet the requirements of the yarn winding process. When the yarn frame adjustment assembly 002 is adjusted to the required yarn frame diameter, the slide table drive cylinder 502 drives the slide table 501 to retract axially. At this time, the shaft end seat 302 of the shaft end drive assembly 003 separates from the lead screw 201, and the stop 401 in the shaft end limit assembly 004 resets under the action of the spring, re-engaging with the lead screw 201, restoring the locking of the circumferential movement of the lead screw 201, and ensuring that the yarn frame adjustment assembly 002 remains stable during the yarn winding process. Finally, the main shaft driver 006 starts, driving the main shaft 001 to rotate through the transmission connection, and the yarn winding operation begins.

[0058] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, this description is not intended to be helpful.

Claims

1. A limiting mechanism for automatically adjusting the size of a yarn frame, characterized in that, include: Main shaft (001), yarn frame adjustment assembly (002), shaft end drive assembly (003), shaft end limiting assembly (004), and sliding base assembly (005); The main shaft (001) is tubular and has an internal cavity; The yarn frame adjustment assembly (002) includes a lead screw (201), which is axially disposed in the cavity of the main shaft (001), and its first end is rotatably connected to the inner wall of the cavity of the main shaft (001), and its second end extends to the outer side of the end of the main shaft (001). The shaft end drive assembly (003) engages with the first limiting groove (2041) at the second end of the lead screw (201) to drive the yarn frame adjustment assembly (002) to adjust the yarn frame diameter. The shaft end limiting component (004) engages with the second limiting groove (2042) at the second end of the lead screw (201) to lock the adjusted yarn frame diameter. The sliding base assembly (005) is fixedly connected to the shaft end drive assembly (003) and the shaft end limiting assembly (004), and is used to drive the shaft end drive assembly (003) and the shaft end limiting assembly (004) to engage or disengage from the first limiting groove (2041) or the second limiting groove (2042) at the second end of the lead screw (201).

2. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 1, characterized in that, The yarn frame adjustment assembly (002) also includes multiple frame rods (202) and multiple telescopic rods (203). The multiple telescopic rods (203) are distributed circumferentially along the main shaft (001), and one end is hinged to the lead screw (201) or the main shaft (001), and the other end is hinged to the multiple frame rods (202).

3. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 1, characterized in that, The shaft end drive assembly (003) includes a first motor (301) and a shaft end seat (302). The first motor (301) and the shaft end seat (302) are fixedly mounted on the sliding base assembly (005). The first motor (301) and the shaft end seat (302) are connected in a transmission manner. The shaft end seat (302) includes a rotating shaft (3021). The rotating shaft (3021) is engaged with a first limiting groove (2041) at the second end of the lead screw (201).

4. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 1, characterized in that, The shaft end limiting assembly (004) includes a stop (401), a reset (402), and a pusher (403). The stop (401) is hinged to one end of the reset (402). The first end of the stop (401) is engaged with the second limiting groove (2042) of the lead screw (201), and the second end is slidably abutted against the pusher (403). The other end of the reset (402) is fixedly connected to the main shaft (001), and the pusher (403) is fixedly connected to the sliding base assembly (005).

5. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 4, characterized in that, The pusher (403) includes an arc-shaped abutment surface, which slides against the second end of the stop (401).

6. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 5, characterized in that, The stop (401) is S-shaped.

7. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 4, characterized in that, The other end of the reset component (402) is provided with a mounting groove (4021) that is adapted to the spindle (001).

8. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 4, characterized in that, The second end of the lead screw (201) is fitted with a limiting seat (204), and the side wall of the limiting seat (204) is evenly distributed with a plurality of second limiting grooves (2042) that engage with the first end of the stop (401).

9. The limiting mechanism for automatically adjusting the size of the yarn frame according to claim 1, characterized in that, The sliding base assembly (005) includes a slide (501) and a slide drive cylinder (502), the slide (501) and the slide drive cylinder (502) being connected.

10. A yarn winding device, characterized in that, include: The main shaft driver (006) and the limiting mechanism for automatically adjusting the size of the yarn frame according to any one of claims 1-9, wherein the main shaft driver (006) is connected to the main shaft (001) in a transmission connection.

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