Twisting device of two-for-one twister

Abstract

The utility model discloses a twisting device of a two-for-one twister, which comprises a mounting table, a tension balancing mechanism fixedly mounted on the upper surface of the mounting table, a first motor fixedly mounted on the upper surface of the tension balancing mechanism, a winding column fixedly mounted on the outer surface of an output shaft of the first motor, and a connecting column fixedly mounted at the other end of the upper surface of the tension balancing mechanism. A bunching mechanism is fixedly installed on the upper surface of the connecting column. Through the design of the tension balance mechanism and the bunching mechanism, the tension force applied to the wire rod in the twisting process can be automatically regulated and controlled, the proper tension force is beneficial to keeping the tightening state of the wire rod in the twisting process, the consistency of the twist degree of the twisted wire rod is guaranteed, and the twisting quality of the twisted wire rod is improved. The elastic pressing and clamping force of the transmission wheel on the wire rod can be automatically adjusted according to the thickness of the wire rod, the pressing and clamping mode can stabilize the transmission path of the wire rod, and in the twisting and winding process, the stable transmission path can reduce shaking and deviation of the wire rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to textile equipment technical field, concretely is a kind of doubling twister twisting device. BACKGROUND

[0002] Twisting refers to the one end of a plurality of filaments is clamped, the other end is rotated, and the plurality of filaments is twisted into a yarn, and before the textile enterprise produces textile products, single yarn needs to be twisted, which requires a twisting device

[0003] The patent with the authorized patent announcement No.CN215481485U discloses a twisting device of doubling twister, which comprises a workbench, a motor box, a control panel, a twisting motor, a bearing wheel, a traction plate, an electrical box, a take-up motor, a servo push rod, an annular wire block, a horizontal connecting rod, a vertical connecting rod, a convenient material changing rotating material disc structure, a tension adjustable wire pressing plate structure and a convenient disassembly and installation fastening nut structure, the left side of the upper part of the workbench is bolted with the motor box; the front middle and lower side of the motor box is screwed with the control panel; the right inner wall of the upper part of the motor box is bolted with the twisting motor, and the output shaft of the twisting motor penetrates the right upper side of the inside of the motor box; the left side of the upper part of the workbench is bolted with the bearing wheel on the front and rear sides respectively, and the bearing wheels are located on the right part of the motor box respectively. In the utility model, the rotating material disc, screw rod, material roller, long nut and annular stopper are arranged, which is beneficial to realize the function of convenient material changing.

[0004] However, the twisting device of the above-mentioned doubling twister cannot automatically control the tension applied to the wire during the twisting process, which can cause the wire to be stretched too much or to be loose, resulting in uneven twisting.

[0005] The wire block cannot expand or contract according to the thickness of the twisted wire during the process of restraining the wire, so as to always adhere to the surface of the wire, which can cause scratches and wear on the surface of the wire, affecting the appearance quality of the wire. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a doubling twister twisting device to solve the problem that the tension applied to the wire during the twisting process cannot be automatically controlled, and the wire block cannot expand or contract according to the thickness of the twisted wire during the process of restraining the wire, so as to always adhere to the surface of the wire.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A kind of doubling twister twisting device, installation platform, the upper surface of the installation platform is fixedly installed with tension balance mechanism, the upper surface of the tension balance mechanism is fixedly installed with first motor, the output shaft outer surface of the first motor is fixedly installed with winding column, the upper surface of the tension balance mechanism other end is fixedly installed with connecting column, the upper surface of the connecting column is fixedly installed with bunching mechanism;

[0009] Wherein, the upper surface of the installation platform other end is fixedly installed with second motor, the output shaft one end of the second motor is fixedly installed with cross bar, the one end of the cross bar is fixedly installed with four groups of insertion column, the insertion column outer surface of the cross bar can be slidably inserted with wire drum.

[0010] Preferably, the insertion column of the cross bar can be screwed with butterfly bolt inside, so that the butterfly bolt can be screwed and pressed on one end of the wire drum, so as to limit the wire drum at the outer surface of the cross bar insertion column.

[0011] Preferably, the outer surface of the connecting column is fixedly installed with traction plate at one end, and the wire on the outer surface of the wire drum can be wound on the outer surface of the winding column through the traction plate and the bunching mechanism.

[0012] Preferably, the tension balance mechanism includes slide rail, the slide rail is fixedly installed on the upper surface of the installation platform, the outer surface of the slide rail is slidably installed with sliding block, the upper surface of the sliding block is fixedly installed with first motor and connecting column.

[0013] Preferably, the upper surface of the slide rail is provided with guide groove, and the guide groove is fixedly installed with slide column. The outer surface of the slide column in the guide groove is sleeved with first spring.

[0014] Preferably, one end of the first spring is fixedly connected in one end of the guide groove, the other end of the first spring is fixedly connected in one end of the connecting plate, and the connecting plate is slidably installed in the guide groove and fixedly installed at the lower surface of the sliding block.

[0015] Preferably, the first spring can exert a spring pushing force on the sliding block, and the wire can be pressed and clamped by the bunching mechanism on the upper surface of the connecting column, so that the sliding block can exert a tensioning force on the wire clamped by the bunching mechanism.

[0016] Preferably, the bunching mechanism includes T-shaped rod, the T-shaped rod is fixedly installed on the upper surface of the connecting column, the outer surface of both ends of the T-shaped rod is provided with sliding groove, the sliding groove is fixedly installed with slide column, the outer surface of the slide column in the sliding groove is slidably installed with guide column, the outer surface of the guide column is fixedly installed with rotating column at the upper end, and the rotating column is rotatably installed with transmission wheel.

[0017] Preferably, both sets of drive wheels have pressure grooves on their outer surfaces, allowing the twisted wire to pass through them, and enabling the pressure grooves on the outer surfaces of the drive wheels to apply clamping force to the twisted wire for winding by the take-up column.

[0018] Preferably, a second spring is fitted on the outer surface of the sliding column in the sliding groove. The two ends of the second spring respectively abut against one end of the sliding groove and one end of the guide column, so that the guide column can push the transmission wheel towards the center by the elastic force applied by the second spring. This allows the two sets of transmission wheels to expand the distance between their ends according to the thickness of the wire and squeeze the second spring to always apply a clamping force to the wire.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Through the design of the first motor, second motor, crossbar, take-up column, tension balancing mechanism, and wire-binding mechanism, in use, the spool is inserted into the outer surface of the four sets of crossbar inserts and fixed with wing bolts. Then, the wire on the outer surface of the spool is passed through the traction plate and the wire-binding mechanism and fixed to the outer surface of the take-up column. The wire-binding mechanism applies a clamping force to the wire passing through it, and at the same time applies an elastic tension force, which can maintain a stable tension state of the wire during twisting. Appropriate tension helps to ensure the uniformity of twisting and avoid twisting defects caused by insufficient or excessive tension, thereby improving the quality of the twisted wire. Then, the first motor and second motor can be started. The first motor drives the spool at one end of the crossbar to rotate, thereby realizing the twisting of the wire. The rotation of the second motor drives the take-up column to wind up the twisted wire. On the outer surface, the wire becomes thicker after twisting. As it is pulled through the wire bundling mechanism, the mechanism is pushed outward to expand the spacing between the wires to match their thickness. This allows the wire bundling mechanism to consistently apply a clamping force to the wire, enabling it to adapt well to changes in wire thickness during twisting. This ensures effective constraint on the wire, preventing loosening or slippage during twisting and winding. It also helps maintain stable tension, further ensuring smooth twisting and winding, improving product quality. Furthermore, the winding column applies a pulling force to the wire while winding, continuously pulling it out from the outer surface of the spool for twisting. This ensures the continuity of the entire twisting and winding process, avoiding production interruptions or product quality issues due to insufficient wire supply, and guaranteeing efficient and stable production.

[0021] 2、Through the design of slide rail, sliding block, first spring, T-shaped rod, second spring, guide column and transmission wheel, the wire outside the wire drum is inserted through the traction plate, then passes through the wire pressing groove on the outer surface between the two sets of transmission wheels, and at the same time, the two sets of transmission wheels are pressed and clamped on the surface of the wire by the elastic force of the second spring on the guide column, then the wire can be connected at the outer surface of the winding column, and after the other end of the wire is fixedly connected and pressed and clamped, the sliding block is pulled to avoid being pushed by the first spring to slide on the outer surface of the slide rail when the first spring exerts an elastic pushing force on the sliding block, so that the sliding block can exert a tension on the wire through the elastic pushing force of the first spring, and appropriate tension can help to keep the wire tight during twisting, avoid uneven twisting due to insufficient tension, ensure the consistency of the twist of the wire after twisting, improve the twisting quality, then the first motor and the second motor can be started, the first motor drives the wire drum at one end of the cross rod to rotate, thereby realizing wire twisting, and the rotation of the second motor drives the winding column to wind the twisted wire on the outer surface, and the wire becomes thicker after twisting, thereby being pulled through the two sets of transmission wheels, which makes the transmission wheel be pushed to drive the guide column to slide outward and expand, and at the same time, the guide column can be pressed at one end of the second spring to increase the distance between the two sets of transmission wheels to match the thickness of the wire, and the second spring can also exert greater elastic pressure on the transmission wheel, thereby enabling the transmission wheel to adjust the elastic clamping force on the wire according to the thickness of the wire, and this clamping method can stabilize the transmission path of the wire, and in the twisting and winding process, the stable transmission path can reduce the shaking and deviation of the wire, ensure that the wire moves in the predetermined direction and trajectory, thereby improving the accuracy of production and product quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the overall structure of the utility model;

[0023] Figure 2 It is a schematic view of the structure of the cross rod and the traction plate of the utility model;

[0024] Figure 3 It is a schematic view of the tension balancing mechanism of the utility model;

[0025] Figure 4 It is a schematic view of the wire binding mechanism of the utility model.

[0026] In the figure: 1, installation platform; 101, first motor; 102, second motor; 103, cross rod; 104, winding column; 105, connecting column; 106, traction plate; 107, butterfly bolt; 2, tension balance mechanism; 201, sliding rail; 202, guide groove; 203, sliding block; 204, connecting plate; 205, first spring; 3, wire bundling mechanism; 301, T-shaped rod; 302, sliding groove; 303, second spring; 304, guide column; 305, rotating column; 306, transmission wheel. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0029] As Figures 1-2 Indicated, a two-for-one twister twisting device, including: installation platform 1, the upper surface of installation platform 1 is fixedly installed with tension balance mechanism 2, the upper surface of tension balance mechanism 2 is fixedly installed with first motor 101, the output shaft outer surface of first motor 101 is fixedly installed with winding column 104, the upper surface of tension balance mechanism 2 is fixedly installed with connecting column 105 on the other end, the upper surface of connecting column 105 is fixedly installed with wire bundling mechanism 3;

[0030] Wherein, the upper surface of installation platform 1 is fixedly installed with second motor 102 on the other end, the output shaft one end of second motor 102 is fixedly installed with cross rod 103, cross rod 103 one end is fixedly installed with four groups of insertion column, the insertion column outer surface of cross rod 103 can be inserted with wire cylinder.

[0031] The insertion column of cross rod 103 can be screwed with butterfly bolt 107, so that butterfly bolt 107 can be screwed and pressed on one end of wire cylinder, so as to limit and fix wire cylinder at the outer surface of cross rod 103 insertion column.

[0032] The outer surface of connecting column 105 is fixedly installed with traction plate 106 on one end, so that the wire on the outer surface of wire cylinder can be wound on the outer surface of winding column 104 through traction plate 106 and wire bundling mechanism 3.

[0033] Through the design of the first motor 101, the second motor 102, the cross rod 103, the winding column 104, the tension balance mechanism 2 and the wire binding mechanism 3, in use, the wire drum can be inserted on the outer surface of the four sets of cross rods 103 and fixed by the butterfly bolt 107, and then the wire on the outer surface of the wire drum is inserted through the traction plate 106 and the wire binding mechanism 3 and fixedly connected at the outer surface of the winding column 104, and the wire binding mechanism 3 can exert a clamping force on the wire passing therethrough and simultaneously exert an elastic tensioning force on the wire, so that the wire can maintain a stable tension state during twisting, and appropriate tension can help to ensure the uniformity of twisting and avoid twisting defects caused by insufficient or excessive tension, thereby improving the quality of the twisted wire, and then the first motor 102 and the second motor 101 can be started, and the first motor 102 can drive the wire drum at one end of the cross rod 103 to rotate, thereby realizing wire twisting, and the rotation of the second motor 101 can drive the winding column 104 to wind the twisted wire on the outer surface, and the twisted wire will become thicker, thereby causing the wire binding mechanism 3 to be expanded outward between the spacing to match the thickness of the wire during the process of being pulled through the wire binding mechanism 3, so that the wire binding mechanism 3 can always exert a clamping force on the wire, so that the wire binding mechanism 3 can well adapt to the thickness change of the wire during twisting, ensuring effective constraint of the wire, which can prevent the wire from loosening, slipping and other situations during twisting and winding, on the other hand, it also helps to maintain stable tension, further ensures the smooth progress of twisting and winding, improves product quality, and the winding column 104 also exerts a pulling force on the wire during winding, thereby continuously pulling the wire out of the outer surface of the wire drum for twisting, ensuring the continuity of the entire twisting and winding process, avoiding production interruption or product quality problems caused by insufficient wire supply, and ensuring efficient and stable operation of production.

[0034] As shown in Figures 3-4 The tension balance mechanism 2 comprises a sliding rail 201 fixedly installed on the upper surface of the mounting table 1, a sliding block 203 slidingly installed on the outer surface of the sliding rail 201, and a first motor 101 and a connecting column 105 fixedly installed on the upper surface of the sliding block 203.

[0035] The upper surface of the sliding rail 201 is provided with a guide groove 202, and a sliding column is fixedly installed in the guide groove 202. The outer surface of the sliding column in the guide groove 202 is sleeved with a first spring 205.

[0036] One end of the first spring 205 is fixedly connected to one end in the guide groove 202, and the other end of the first spring 205 is fixedly connected to one end of a connecting plate 204 sliding in the guide groove 202 and fixedly installed at the lower surface of the sliding block 203.

[0037] The first spring 205 can exert a spring pushing force on the sliding block 203, and through the binding mechanism 3 on the upper surface of the connecting column 105, the wire can be clamped, so that the sliding block 203 can drive the wire clamped between the binding mechanism 3 to exert a pulling tension.

[0038] The binding mechanism 3 comprises a T-shaped rod 301 fixedly installed on the upper surface of the connecting column 105, and sliding grooves 302 are formed on the outer surfaces of the two ends of the T-shaped rod 301, and sliding columns are fixedly installed in the sliding grooves 302. The outer surfaces of the sliding columns in the sliding grooves 302 are slidably installed with guide columns 304, the outer surfaces of the guide columns 304 are fixedly installed with rotating columns 305, and the rotating columns 305 are rotatably installed with transmission wheels 306.

[0039] The outer surfaces of the two groups of transmission wheels 306 are provided with wire pressing grooves, so that the twisted wire can pass through the wire pressing grooves, and the wire pressing grooves on the outer surfaces of the transmission wheels 306 can exert a clamping force on the twisted wire for the winding column 104 to wind.

[0040] The outer surfaces of the sliding columns in the sliding grooves 302 are sleeved with second springs 303, and the two ends of the second springs 303 respectively abut against one end of the sliding groove 302 and one end of the guide column 304, so that the guide column 304 can push and squeeze the transmission wheel 306 to the center by the elastic force of the second spring 303, and thus the two groups of transmission wheels 306 can expand the distance between the outer ends according to the thickness of the wire and squeeze the second spring 303 to always exert a clamping force on the wire.

[0041] Through the design of the slide rail 201, the sliding block 203, the first spring 205, the T-shaped rod 301, the second spring 303, the guide column 304 and the transmission wheel 306, after the wire on the outer surface of the wire drum is inserted through the traction plate 106, it will pass through the wire pressing groove on the outer surface between the two groups of transmission wheels 306 again, and at the same time, the two groups of transmission wheels 306 will be pressed and clamped on the surface of the wire by the elastic force of the second spring 303 on the guide column 304, and then the wire can be connected at the outer surface of the winding column 104, and after the other end of the wire is fixedly connected and pressed and clamped, the sliding block 203 will be pulled to avoid being pushed by the first spring 205 to slide on the outer surface of the slide rail 201 when the first spring 205 exerts an elastic pushing force on the sliding block 203, thereby enabling the sliding block 203 to exert a tension on the wire by the elastic pushing force of the first spring 205. A suitable tension helps to maintain the tight state of the wire during twisting, avoids uneven twisting due to insufficient tension, ensures the consistency of the twist of the wire after twisting, improves the twisting quality, and then the first motor 102 and the second motor 101 can be started. The first motor 102 will drive the wire drum at one end of the cross rod 103 to rotate, thereby realizing the twisting of the wire, and the rotation of the second motor 101 will drive the winding column 104 to wind the twisted wire on the outer surface. After the wire is twisted, it will become thicker, and then be pulled through the two groups of transmission wheels 306, which will make the transmission wheel 306 be pushed to drive the guide column 304 to slide outward and expand, and at the same time, the guide column 304 can be pressed at one end of the second spring 303 to increase the distance between the two groups of transmission wheels 306 to match the thickness of the wire, which will also make the second spring 303 exert greater elastic pressure on the transmission wheel 306, thereby enabling the transmission wheel 306 to adjust the elastic clamping force on the wire according to the thickness of the wire. This clamping method can stabilize the transmission path of the wire, and in the twisting and winding process, the stable transmission path can reduce the shaking and deviation of the wire, ensuring that the wire moves according to the predetermined direction and trajectory, thereby improving the accuracy of production and product quality.

[0042] According to the above technical scheme, the working steps of the present scheme are summarized and combed: when in use, the wire drum can be inserted into the outer surface of the four sets of cross rods 103 and fixed by the butterfly bolts 107, then the wire on the outer surface of the wire drum is inserted through the traction plate 106 and the wire pressing groove on the outer surface between the two sets of transmission wheels 306, and at the same time, the two sets of transmission wheels 306 are pressed on the surface of the wire by the elastic force of the guide column 304 driven by the second spring 303, then the wire can be connected at the outer surface of the winding column 104, and after the other end of the wire is fixedly connected and compressed, the sliding block 203 is pulled to avoid being pushed by the first spring 205 to slide on the outer surface of the sliding rail 201 when the first spring 205 exerts an elastic pushing force on the sliding block 203, thereby enabling the sliding block 203 to exert a tension on the wire by the elastic pushing force of the first spring 205, then the first motor 102 and the second motor 101 can be started, and the first motor 102 will drive the wire drum at one end of the cross rod 103 to rotate, thereby realizing twisting of the wire, and the rotation of the second motor 101 will drive the winding column 104 to wind the twisted wire on the outer surface, and the wire will become thicker after being twisted, thereby being pulled through the two sets of transmission wheels 306, which will drive the guide column 304 to slide outward and expand, and at the same time, the guide column 304 will press on one end of the second spring 303 to increase the distance between the two sets of transmission wheels 306 to match the thickness of the wire, and the second spring 303 will also exert greater elastic force on the transmission wheels 306, and the winding column 104 will also exert a pulling force on the wire while winding, thereby continuously pulling the wire out of the outer surface of the wire drum for twisting, ensuring the continuity of the twisting and winding process.

[0043] In summary, the tension exerted on the wire during twisting can be automatically controlled, and appropriate tension helps to maintain the tight state of the wire during twisting, avoids uneven twisting due to insufficient tension, ensures the consistency of the twist of the twisted wire, and enables the transmission wheels 306 to adjust the elastic clamping force on the wire according to the thickness of the wire. This clamping method can stabilize the transmission path of the wire, reduce the shaking and deviation of the wire during twisting and winding, ensure that the wire moves in the predetermined direction and trajectory, thereby improving the accuracy of production and the quality of the product.

[0044] The parts not involved in the present application are the same as or can be realized by the prior art. Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A two-for-one twister twisting device characterized in that, The application relates to a wire winding device. The installation table (1) is provided with a tension balance mechanism (2) fixedly arranged on the upper surface, a first motor (101) fixedly arranged on the upper surface of the tension balance mechanism (2), a winding column (104) fixedly arranged on the output shaft of the first motor (101), a connecting column (105) fixedly arranged on the other end of the upper surface of the tension balance mechanism (2), and a wire binding mechanism (3) fixedly arranged on the upper surface of the connecting column (105). The other end of the upper surface of the installation table (1) is provided with a second motor (102), the output shaft of the second motor (102) is provided with a cross rod (103) fixedly arranged on one end, the cross rod (103) is provided with four groups of inserting columns fixedly arranged on one end, and the inserting columns of the cross rod (103) can be slidably inserted with wire cylinders.

2. A twist multiplier twist adding device according to claim 1, characterized in that: The inserting columns of the cross rod (103) are provided with butterfly bolts (107) threadedly arranged in the inserting columns, so that the butterfly bolts (107) can be threadedly pressed on one end of the wire cylinders, and the wire cylinders are limited and fixed on the outer surface of the inserting columns of the cross rod (103).

3. A twist multiplier twist adding device according to claim 1, characterized in that: The outer surface of the connecting column (105) is provided with a traction plate (106) fixedly arranged on one end, and the wire lines on the outer surface of the wire cylinders can pass through the traction plate (106) and the wire binding mechanism (3) and be wound on the outer surface of the winding column (104).

4. A twist multiplier twist adding device according to claim 1, characterized in that: The tension balance mechanism (2) comprises a sliding rail (201) fixedly arranged on the upper surface of the installation table (1), a sliding block (203) slidably arranged on the outer surface of the sliding rail (201), and the first motor (101) and the connecting column (105) fixedly arranged on the upper surface of the sliding block (203).

5. A twist multiplier twist adding device according to claim 4, characterised in that: The upper surface of the sliding rail (201) is provided with a guide groove (202), the guide groove (202) is provided with a sliding column fixedly arranged in the guide groove (202), and the outer surface of the sliding column in the guide groove (202) is provided with a first spring (205).

6. A twist multiplier twist adding device according to claim 5, characterised in that: One end of the first spring (205) is fixedly connected to one end in the guide groove (202), the other end of the first spring (205) is fixedly connected to one end of a connecting plate (204), the connecting plate (204) is slidably arranged in the guide groove (202) and fixedly arranged on the lower surface of the sliding block (203).

7. A twist multiplier twist adding device according to claim 6, characterized in that: The first spring (205) can exert an elastic pushing force on the sliding block (203), and the wire material can be pressed and clamped through the wire binding mechanism (3) on the upper surface of the connecting column (105), so that the sliding block (203) can drive the wire binding mechanism (3) to exert a pulling tension on the clamped wire material.

8. A twist multiplier twist adding device according to claim 1, characterized in that: The wire binding mechanism (3) comprises a T-shaped rod (301) fixedly arranged on the upper surface of the connecting column (105), sliding grooves (302) formed on the outer surfaces of the two ends of the T-shaped rod (301), sliding columns fixedly arranged in the sliding grooves (302), guide columns (304) slidably arranged on the outer surfaces of the sliding columns in the sliding grooves (302), rotating columns (305) fixedly arranged on the outer surfaces of the upper ends of the guide columns (304), and transmission wheels (306) rotatably arranged on the outer surfaces of the rotating columns (305).

9. A twist multiplier twist adding device according to claim 8, characterized in that: The outer surface of the transmission wheel (306) is provided with a pressure line groove, which allows the twisted wire to pass through and enables the transmission wheel (306) to exert pressure on the twisted wire for winding.

10. A twist multiplier twist adding device according to claim 8, characterized in that: The outer surface of the sliding column in the sliding groove (302) is sleeved with a second spring (303), and the two ends of the second spring (303) are respectively in contact with one end of the sliding groove (302) and one end of the guide column (304), so that the guide column (304) can push the transmission wheel (306) to the center by the elastic force of the second spring (303), and then the two groups of transmission wheels (306) can expand the distance between the outer ends according to the thickness of the wire and squeeze the second spring (303) to always exert pressure on the wire.

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