A yarn guiding device for a composite material fiber yarn rack and its yarn guiding process

Abstract

The present invention discloses a yarn guiding device for a composite material fiber yarn rack and a yarn guiding process for the yarn rack, which relates to the field of composite material fiber yarn guiding. It includes a bottom plate, a fixing rod, and a fixing frame. The upper end surface of the bottom plate is fixed with the fixing rod, and the upper end surface of the bottom plate is fixed with the fixing frame. The fixing rod is fixed to the mounting frame through bolts. A yarn guiding mechanism is installed on the mounting frame, and a positioning mechanism is connected by bearings on the fixing frame. A bobbin is installed on the positioning mechanism. For the yarn guiding device for the composite material fiber yarn rack and the yarn guiding process for the yarn rack, an elastic driving mechanism is adopted. When the mounting shaft gets stuck, the tension force of the yarn can be used to provide a driving force for the rotation of the mounting shaft, so that the mounting shaft can automatically resume normal rotation, avoiding the problem of yarn breakage. A centrifugal limiting mechanism is adopted to achieve the limiting effect on the bobbin when the yarn is released, preventing the bobbin from detaching from the mounting shaft and ensuring the stable operation of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material fiber yarn guiding, and particularly to a yarn guiding device for a composite material fiber yarn frame and a yarn guiding process thereof. Background Technique

[0002] Composite material fibers are artificial limits composed of multiple component fibers, such as glass fibers, carbon fibers, and polymer fibers. They are widely used in fields such as construction, aerospace, automobiles, ships, and electronics. During the production of composite material fibers, the fibers are fixed on the yarn bobbin, and the yarn bobbin rotates to unwind the yarn under the tension of the needle hook. Then, the fibers are led out through the yarn eye for subsequent knitting processing.

[0003] However, during actual use, when the rotation of the yarn bobbin mounting shaft gets stuck (such as when the bearing rusts or foreign objects adhere, making it difficult for the mounting shaft to rotate normally and stably), it is necessary to manually rotate the mounting shaft a few turns to make the foreign objects fall off so that the mounting shaft can resume normal rotation. Moreover, when the rotation of the yarn bobbin mounting shaft gets stuck, due to the continuous existence of the tension of the needle hook, the yarn will break, thus affecting the normal operation of the device. Therefore, in view of the above problems, a yarn guiding device for a composite material fiber yarn frame and a yarn guiding process thereof are designed to better meet the actual use requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a yarn guiding device for a composite material fiber yarn frame and a yarn guiding process thereof to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A yarn guiding device for a composite material fiber yarn frame, including a bottom plate, a fixed rod, and a fixed frame. The upper end surface of the bottom plate is fixed with a fixed rod, and the upper end surface of the bottom plate is fixed with a fixed frame. The fixed rod is fixed to the mounting frame through bolts. A yarn guiding mechanism is installed on the mounting frame. A positioning mechanism is connected to the fixed frame through a bearing. A bobbin is installed on the positioning mechanism. A driving mechanism is arranged below the positioning mechanism. The driving mechanism includes a movable frame, a yarn guiding wheel, a guiding rod, a fixing plate, a third spring, a convex rack, a compound wheel, a connecting rod, a fixed wheel, a pawl, and a limiting block. The movable frame is connected to the yarn guiding wheel through a bearing. The lower end of the movable frame is fixed with a guiding rod, and the guiding rod is slidably connected to the fixing plate. The fixing plate is fixed on the fixed frame. A third spring is fixed between the fixing plate and the guiding rod. A convex rack is fixed on the movable frame, and the convex rack is engaged with the compound wheel for transmission. The outer side of the compound wheel is a gear structure, and the inner side of the compound wheel is a ratchet structure. A connecting rod is fixed on the compound wheel, and the connecting rod is slidably connected to the fixed wheel. The fixed wheel is fixedly connected to the mounting shaft. A pawl is rotatably connected to the fixed wheel through a torsion spring, and the pawl contacts the limiting block for positioning. The limiting block is fixed inside the fixed wheel.

[0006] Preferably, the yarn guiding mechanism includes a movable block, a yarn guiding ring, a positioning rod, a partition plate, a vertical rod, a first spring, a mounting plate and a ball. The movable block is slidably connected to the mounting frame, and a yarn guiding ring is fixed to the lower end of the movable block. A positioning rod is fixed to the lower end of the yarn guiding ring, and the positioning rod can be nested in a circular hole on the mounting frame to achieve positioning. Through the above structure, the position adjustment and fixation of the yarn guiding ring can be realized, so as to realize the distance adjustment between the two yarn guiding rings, so as to better meet the actual use requirements.

[0007] Preferably, a partition plate is fixed inside the movable block, and the partition plate is slidably connected to the vertical rod, and a first spring is fixed between the partition plate and the vertical rod. Through the sliding action between the partition plate and the vertical rod and the elastic action of the first spring, a basic guarantee can be provided for the automatic reset of the vertical rod.

[0008] Preferably, a mounting plate is fixed on the vertical rod, and a ball is mounted on the mounting plate, and the ball can roll in contact with the mounting frame. Through the rolling action between the ball and the mounting frame, the movable block can be conveniently moved, thus providing a basic guarantee for the position adjustment of the yarn guiding ring.

[0009] Preferably, a support plate is fixed on the fixing frame, and a yarn guiding hole is provided on the support plate, and the support plate is located above the movable frame. Through the function of the yarn guiding hole, the guiding and limiting function of the yarn can be realized.

[0010] Preferably, the positioning mechanism includes a mounting shaft, a limiting plate, an elastic strip, a sliding rod, a second spring and a gravity ball. The mounting shaft is connected to the fixing frame by a bearing, and the mounting shaft is nested with the bobbin, and a limiting plate is fixed on the mounting shaft. At the same time, the limiting plate contacts the bobbin to achieve positioning. Through the function of the limiting plate, the limiting function of the bobbin can be realized.

[0011] Preferably, elastic strips are fixed on the outer side of the mounting shaft at equal angles, and the elastic strips contact the inner wall of the bobbin to achieve fixation. Through the elastic fastening function of the elastic strips, the stability of the installation of the mounting shaft and the bobbin can be ensured.

[0012] Preferably, sliding rods are slidably connected to the front end of the mounting shaft at equal angles, and a second spring is fixed between the sliding rods and the mounting shaft. Through the elastic action of the second spring, a basic acting force can be provided for the automatic reset of the sliding rods, ensuring the normal operation of the device.

[0013] Preferably, a gravity ball is also fixed on the mounting shaft, and the gravity ball is located at one end of the mounting shaft away from the fixing frame. Through the function of the gravity ball, the sliding rods can move under the action of the centrifugal force of the gravity ball, so as to realize the outer limiting function of the bobbin and prevent the bobbin from separating from the mounting shaft.

[0014] A yarn guiding process for a composite material fiber yarn rack is as follows:

[0015] Step 1: Adjust the position of the yarn guiding ring through the sliding action between the movable block and the mounting frame, and cooperate with the nesting of the positioning rod and the circular hole on the mounting frame to achieve positioning;

[0016] Step 2: Install the bobbin on the mounting shaft, and cooperate with the elastic action of the elastic strip to achieve the positioning and supporting effect of the bobbin. When the bobbin rotates to unwind the yarn, due to the centrifugal action of the rotation of the mounting shaft, the gravity ball and the sliding rod move, so that the gravity ball limits the outer side of the bobbin to prevent the bobbin from detaching from the mounting shaft;

[0017] Step 3: When the mounting shaft is stuck accidentally, at this time the yarn is stressed and tightened, causing the movable frame, the yarn guiding wheel, the guiding rod and the convex rack to move upward. With the cooperation of the convex rack, the compound wheel, the fixed wheel and the pawl, the mounting shaft can be rotated, which is convenient for the mounting shaft to resume normal rotation, so that the bobbin can continue to unwind the yarn normally and avoid yarn breakage.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The yarn guiding device for the composite material fiber yarn rack adopts an elastic driving mechanism, which can utilize the acting force of the tightened yarn to provide an acting force for the rotation of the mounting shaft when the mounting shaft is stuck, so that the mounting shaft can automatically resume normal rotation and avoid the problem of yarn breakage. Specifically, when the mounting shaft is stuck and the bobbin cannot rotate to unwind the yarn normally, at this time, under the acting force of the tightened yarn, the movable frame, the yarn guiding wheel, the guiding rod and the convex rack move, and with the cooperation of the convex rack, the compound wheel and the pawl, the fixed wheel is forced to rotate, thereby driving the mounting shaft to rotate, and then the mounting shaft can be disengaged from the stuck state, ensuring the normal unwinding of the bobbin and avoiding yarn breakage;

[0020] 2. The yarn guiding device for the composite material fiber yarn rack adopts a centrifugal limiting mechanism, which can achieve the limiting effect of the bobbin when the yarn is released, prevent the bobbin from detaching from the mounting shaft, and ensure the stable operation of the device. Specifically, when the mounting shaft and the bobbin rotate to unwind the yarn, at this time, under the action of centrifugal force, the gravity ball and the sliding rod move, so as to achieve the limiting effect on the outer side of the bobbin and prevent the bobbin from detaching from the mounting shaft when rotating at high speed to unwind the yarn;

[0021] 3. The yarn guiding device for the composite material fiber uses an adjustable guiding mechanism, which can adjust the guiding position of the yarn according to actual needs to avoid yarn entanglement, so as to better meet the actual use requirements. Specifically, by pushing the movable block, the positioning rod can be separated from the round hole on the mounting frame, thus releasing the limiting effect on the movable block. Then, combined with the sliding effect of the movable block and the rolling effect of the ball, the positions of the movable block and the yarn guiding ring can be adjusted to meet the actual wire guiding requirements. After adjustment, with the action of the first spring, the positioning rod resets and nests with the round hole on the mounting frame to ensure the stability of the device. Description of the Drawings

[0022] Figure 1 It is a front view three-dimensional structure schematic diagram of the whole device of the present invention;

[0023] Figure 2 It is a three-dimensional structure schematic diagram composed of the mounting frame and the yarn guiding mechanism of the present invention;

[0024] Figure 3 It is a front view sectional three-dimensional structure schematic diagram of the mounting frame of the present invention;

[0025] Figure 4 It is a sectional three-dimensional structure schematic diagram of the yarn guiding mechanism of the present invention;

[0026] Figure 5 It is a side view three-dimensional structure schematic diagram composed of the positioning mechanism and the driving mechanism of the present invention;

[0027] Figure 6 It is a partial enlarged three-dimensional structure schematic diagram of the mounting shaft of the present invention;

[0028] Figure 7 It is a three-dimensional structure schematic diagram composed of the convex rack and the compound wheel of the present invention.

[0029] In the figure: 1, bottom plate; 2, fixed rod; 3, mounting frame; 4, yarn guiding mechanism; 401, movable block; 402, yarn guiding ring; 403, positioning rod; 404, partition board; 405, vertical rod; 406, first spring; 407, mounting plate; 408, ball; 5, fixed frame; 501, support plate; 502, yarn guiding hole; 6, positioning mechanism; 601, mounting shaft; 602, limiting plate; 603, elastic strip; 604, sliding rod; 605, second spring; 606, gravity ball; 7, bobbin; 8, driving mechanism; 801, movable frame; 802, yarn guiding wheel; 803, guiding rod; 804, fixing plate; 805, third spring; 806, convex rack; 807, compound wheel; 808, connecting rod; 809, fixed wheel; 810, pawl; 811, limiting block. Detailed Embodiment

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] See also Figures 1 - 7 The present invention provides a technical solution: a yarn drawing device for a composite fiber yarn rack, comprising a base plate 1, a fixed rod 2 and a fixed frame 5, the upper end surface of the base plate 1 is fixed with the fixed rod 2, the upper end surface of the base plate 1 is fixed with the fixed frame 5, the fixed rod 2 is fixed to the mounting frame 3 by bolts, the mounting frame 3 is installed with a yarn guiding mechanism 4, the upper bearing of the fixed frame 5 is connected with a positioning mechanism 6, the positioning mechanism 6 is installed with a bobbin 7, and the lower side of the positioning mechanism 6 is provided with a driving mechanism 8.

[0032] The positioning mechanism 6 includes an installation shaft 601, a limit plate 602, an elastic strip 603, a slide bar 604, a second spring 605 and a gravity ball 606. The installation shaft 601 is connected to the fixing frame 5 by a bearing, and the installation shaft 601 and the bobbin 7 are nested and connected. The limit plate 602 is fixed on the installation shaft 601, and the limit plate 602 is in contact with the bobbin 7 to achieve positioning; an elastic strip 603 is fixed at an equal angle on the outer side of the installation shaft 601, and the elastic strip 603 is in contact with the inner wall of the bobbin 7 to achieve fixation; a slide bar 604 is slidably connected at an equal angle to the front end of the installation shaft 601, and a second spring 605 is fixed between the slide bar 604 and the installation shaft 601; a gravity ball 606 is also fixed on the installation shaft 601, and the gravity ball 606 is located at the end of the installation shaft 601 away from the fixing frame 5;

[0033] When using the composite fiber creel yarn drawing device, Figures 1 - 7 As shown, firstly, the bobbin 7 is installed, and the installation of the bobbin 7 can be realized by the nesting effect between the bobbin 7 and the installation shaft 601, until the bobbin 7 contacts the limiting plate 602, at which time the inner wall of the bobbin 7 contacts the elastic strip 603, and the one-time positioning of the bobbin 7 can be realized by the elastic effect of the elastic strip 603, and in the subsequent wire-releasing process, the yarn is pulled by the needle hook to rotate the bobbin 7 and the installation shaft 601 to release the wire, at this time, under the centrifugal force of the rotation of the installation shaft 601, the gravity ball 6 06 and the slide bar 604 move, so that the gravity ball 606 and the slide bar 604 block and limit the outer side of the wire drum 7, so as to prevent the wire drum 7 from being separated from the installation shaft 601 when the wire drum 7 rotates at a high speed to release the wire, thereby ensuring the stable operation of the device. When the wire release is completed, the wire drum 7 and the installation shaft 601 are no longer rotating, and the elastic effect of the second spring 605 is cooperated to make the gravity ball 606 and the slide bar 604 reset, and the blocking effect of the wire drum 7 is released, which is convenient for the disassembly and replacement of the wire drum 7, and improves the convenience of device operation.

[0034] The yarn guiding mechanism 4 includes a movable block 401, a yarn guiding ring 402, a positioning rod 403, a partition plate 404, a vertical rod 405, a first spring 406, a mounting plate 407 and a ball 408. The movable block 401 is slidably connected to the mounting frame 3, and a yarn guiding ring 402 is fixed to the lower end of the movable block 401, and a positioning rod 403 is fixed to the lower end of the yarn guiding ring 402. At the same time, the positioning rod 403 is nested with the circular hole on the mounting frame 3 to achieve positioning; a partition plate 404 is fixed inside the movable block 401, and the partition plate 404 is slidably connected to the vertical rod 405, and a first spring 406 is fixed between the partition plate 404 and the vertical rod 405; a mounting plate 407 is fixed on the vertical rod 405, and a ball 408 is mounted on the mounting plate 407, and the ball 408 can roll in contact with the mounting frame 3; a support plate 501 is fixed on the fixed frame 5, and a yarn guiding hole 502 is formed in the support plate 501, and the support plate 501 is located above the movable frame 801;

[0035] After the bobbin 7 is installed, as Figures 1 - 7 shown, adjust the position of the yarn guiding ring 402 according to the actual production needs to avoid entanglement between the yarns. At this time, only need to push the movable block 401 upward to separate the positioning rod 403 from the circular hole on the mounting frame 3, so as to release the positioning function of the movable block 401 and the yarn guiding ring 402. Then, with the sliding action between the movable block 401 and the mounting frame 3 and the rolling action between the ball 408 and the mounting frame 3, the yarn guiding ring 402 can be moved, so as to realize the position adjustment of the yarn guiding ring 402 to better meet the actual use requirements. After the adjustment is completed, by releasing the movable block 401, at this time, under the elastic action of the first spring 406, the positioning rod 403 is reset and nested with the circular hole on the mounting frame 3 for positioning to ensure the stability of the position of the yarn guiding ring 402 after adjustment. Finally, pass the yarn of the bobbin 7 through the yarn guiding hole 502 and the yarn guiding ring 402 and connect it with the needle hook, so as to facilitate the subsequent knitting process of the yarn;

[0036] The driving mechanism 8 includes a movable frame 801, a yarn guiding wheel 802, a guiding rod 803, a fixing plate 804, a third spring 805, a convex rack 806, a compound wheel 807, a connecting rod 808, a fixed wheel 809, a pawl 810 and a limiting block 811. A yarn guiding wheel 802 is connected to the movable frame 801 by a bearing. A guiding rod 803 is fixed to the lower end of the movable frame 801. The guiding rod 803 is slidably connected with the fixing plate 804. The fixing plate 804 is fixed on the fixed frame 5. A third spring 805 is fixed between the fixing plate 804 and the guiding rod 803. A convex rack 806 is fixed on the movable frame 801. The convex rack 806 cooperates with the compound wheel 807 to achieve transmission. The outer side of the compound wheel 807 is a gear structure, and the inner side of the compound wheel 807 is a ratchet structure. A connecting rod 808 is fixed on the compound wheel 807. The connecting rod 808 is slidably connected with the fixed wheel 809. The fixed wheel 809 is fixedly connected with the mounting shaft 601. A pawl 810 is rotatably connected to the fixed wheel 809 through a torsion spring. The pawl 810 contacts the limiting block 811 to achieve positioning. The limiting block 811 is fixed inside the fixed wheel 809;

[0037] During the operation of the device, as Figures 1 - 7 shown, when the mounting shaft 601 gets stuck, at this time, under the traction force of the needle hook, the yarn is in a tensioned state, so that the movable frame 801, the yarn guiding wheel 802 and the guiding rod 803 are forced to move upward, and then drive the convex rack 806 to move upward. With the sliding guiding effect between the guiding rod 803 and the fixing plate 804, the stability of the movement of the convex rack 806 can be ensured. When the convex rack 806 moves, with the meshing transmission effect between the convex rack 806 and the outer gear of the compound wheel 807, the compound wheel 807 is forced to rotate counterclockwise. With the cooperation of the pawl 810 and the inner ratchet structure of the compound wheel 807, the fixed wheel 809 rotates counterclockwise synchronously with the compound wheel 807, thereby driving the mounting shaft 601 and the bobbin 7 to rotate, so that the mounting shaft 601 can better get out of the stuck state, ensure the normal operation of the device, and thus ensure the normal yarn unwinding function of the bobbin 7. When the mounting shaft 601 gets out of the stuck state, at this time, under the action of the third spring 805, the movable frame 801, the yarn guiding wheel 802, the guiding rod 803 and the convex rack 806 automatically reset. When the convex rack 806 moves downward, at this time the compound wheel 807 rotates clockwise. When cooperating with the rotation of the pawl 810, at this time the fixed wheel 809 does not rotate with the compound wheel 807, thus ensuring the normal operation of the device. This is the working principle of the yarn guiding device of the yarn frame for composite material fibers.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite fiber yarn drawing device, comprising a base plate (1), a fixing rod (2) and a fixing frame (5), wherein the fixing rod (2) is fixed to the upper end surface of the base plate (1), and the fixing frame (5) is fixed to the upper end surface of the base plate (1), characterized in that: The fixing rod (2) is fixed to the mounting frame (3) by bolts, a yarn guide mechanism (4) is mounted on the mounting frame (3), a positioning mechanism (6) is connected to a bearing on the fixing frame (5), a bobbin (7) is mounted on the positioning mechanism (6), a driving mechanism (8) is arranged on the lower side of the positioning mechanism (6), and the driving mechanism (8) comprises a movable frame (801), a yarn guide wheel (802), a guide rod (803), a fixing plate (804), a third spring (805), a convex rack (806), a composite wheel (807), a connecting rod (808), a fixed wheel (809), a ratchet (810) and a limit block (811); a yarn guide wheel (802) is connected to a bearing on the movable frame (801); a guide rod (803) is fixed to the lower end of the movable frame (801); the guide rod (803) and the fixed plate (804) are slidably connected; the fixed plate (804) is fixed on the fixed frame (5); a third spring (805) is fixed between the fixed plate (804) and the guide rod (803); and a convex rack (806) is fixed on the movable frame (801). The convex rack (806) cooperates with the composite wheel (807) to realize transmission, and the outer side of the composite wheel (807) is a gear structure, and the inner side of the composite wheel (807) is a ratchet structure. A connecting rod (808) is fixed to the composite wheel (807), and the connecting rod (808) and the fixed wheel (809) are slidably connected. The fixed wheel (809) and the mounting shaft (601) are fixedly connected. A ratchet (810) is rotatably connected to the fixed wheel (809) through a torsion spring, and the ratchet (810) contacts the limit block (811). To achieve positioning, the limit block (811) is fixed in the fixed wheel (809), the positioning mechanism (6) comprises a mounting shaft (601), a limit plate (602), an elastic strip (603), a sliding rod (604), a second spring (605) and a gravity ball (606), the mounting shaft (601) is bearing-connected to the fixed frame (5), the mounting shaft (601) and the bobbin (7) are nested, and the limit plate (602) is fixed on the mounting shaft (601), and the limit plate (602) is in contact with the bobbin (7) to achieve positioning.

2. A composite material fiber creel yarn drawing device according to claim 1, characterized in that: The yarn guiding mechanism (4) comprises a movable block (401), a yarn guiding ring (402), a positioning rod (403), a partition (404), a vertical rod (405), a first spring (406), a mounting plate (407) and a ball (408); the movable block (401) and the mounting frame (3) are slidably connected, the yarn guiding ring (402) is fixed at the lower end of the movable block (401), and the positioning rod (403) is fixed at the lower end of the yarn guiding ring (402); and the positioning rod (403) is nested with a circular hole on the mounting frame (3) to achieve positioning.

3. A composite fiber creel yarn drawing device according to claim 2, characterized in that: A partition plate (404) is fixed inside the movable block (401), and the partition plate (404) and the vertical rod (405) are slidably connected, and a first spring (406) is fixed between the partition plate (404) and the vertical rod (405).

4. A composite fiber creel yarn drawing device according to claim 3, characterized in that: A mounting plate (407) is fixed on the vertical rod (405), and a ball (408) is mounted on the mounting plate (407), and the ball (408) is in contact with the mounting frame (3) and can roll.

5. A composite material fiber creel yarn drawing device according to claim 4, characterized in that: A support plate (501) is fixed on the fixed frame (5), a yarn guide hole (502) is provided on the support plate (501), and the support plate (501) is located above the movable frame (801).

6. A composite material fiber creel yarn drawing device according to claim 5, characterized in that: Elastic strips (603) are fixed at equal angles on the outside of the installation shaft (601), and the elastic strips (603) are in contact with the inner wall of the wire barrel (7) to achieve fixation.

7. A composite material fiber creel yarn drawing device according to claim 6, characterized in that: The front end of the installation shaft (601) is equiangularly slidably connected to a slide rod (604), and a second spring (605) is fixed between the slide rod (604) and the installation shaft (601).

8. A composite material fiber creel yarn drawing device according to claim 7, characterized in that: A gravity ball (606) is also fixed on the installation shaft (601), and the gravity ball (606) is located at an end of the installation shaft (601) away from the fixing frame (5).

9. A composite fiber creel yarn drawing process, applied to a composite fiber creel yarn drawing device according to claim 8, characterized in that: The specific steps are as follows: Step 1: adjusting the position of the yarn guide ring (402) by means of the sliding action between the movable block (401) and the mounting frame (3), and achieving positioning by means of the positioning rod (403) being nested with the circular hole on the mounting frame (3); Step 2: Install the bobbin (7) on the installation shaft (601), cooperate with the elastic effect of the elastic strip (603) to achieve the positioning and supporting function of the bobbin (7), when the bobbin (7) rotates to release the line, the centrifugal effect of the rotation of the installation shaft (601) causes the gravity ball (606) and the slide bar (604) to move, so that the gravity ball (606) limits the outer side of the bobbin (7) to prevent the bobbin (7) from being separated from the installation shaft (601); Step 3: When the installation shaft (601) is stuck due to an accident, the yarn is tightened, causing the movable frame (801), the yarn guide wheel (802), the guide rod (803) and the convex rack (806) to move upward. With the help of the convex rack (806), the composite wheel (807), the fixed wheel (809) and the ratchet (810), the installation shaft (601) can be rotated, which facilitates the installation shaft (601) to resume normal rotation, so that the bobbin (7) can continue to release the thread normally to avoid thread breakage.

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