Wire moving wheel and wire moving assembly for texturing machine

Abstract

The invention discloses a wire moving wheel and a wire moving assembly for a texturizing machine, comprising a wheel body and an axial hole and a guide limiting groove respectively formed on the wheel body, wherein the guide limiting groove surrounds the axial hole and is arranged concentrically with the axial hole; the guide limiting groove comprises a guide inner ring, a guide outer ring and a ring-shaped groove located therebetween, and the axial hole is arranged in the middle of the guide inner ring; the groove comprises n component grooves, each component groove comprises a first sub-groove, a second sub-groove and two third sub-grooves, and the order of connection and communication is: the first sub-groove, the third sub-groove, the second sub-groove and the third sub-groove; the width of each groove is the same, and the distance between the center of each sub-groove along its own width direction and the center of the axial hole is arranged in the order of: the second sub-groove, the third sub-groove and the first sub-groove; and a wire moving assembly comprising the above-mentioned wire moving wheel and capable of driving the wire strip to reciprocate; the wire moving wheel can effectively enlarge the wire moving spacing and reduce or even avoid the wire strip jitter.

Description

Technical Field

[0001] The invention relates to the field of texturing machines for chemical fiber production equipment, in particular to improved and optimized wire moving spare parts for chemical fiber production equipment, and specifically to a wire moving wheel and a wire moving assembly for the texturing machine. Background Art

[0002] In the process of producing DTY, each roller needs to meet the relevant process requirements of DTY production such as stretching, heating deformation, heating setting, winding forming, etc. Since the roller is made of rubber, the material is very soft and has almost no wear resistance, measures need to be taken to prevent DTY from passing through the same position of the roller and causing damage to the roller. Otherwise, once the roller is seriously worn, the surface of the roller can only be ground. In order to ensure the normal progress of the process, the surface of the roller must be smooth and there must be no light transmission when running on the machine. Usually, reciprocating grinding is required to meet the use requirements. The grinding of the roller is labor-intensive, the grinding surface of the roller is greatly damaged, and the service life of the roller is reduced.

[0003] At present, a cam disc is usually used to cooperate with a driven element for power transmission, so as to realize the back and forth movement of the wire strip on the roller to reduce the long-term wear of the same position. However, in practice, it is found that the roller still has serious wear after a short period of use. Research has found that it should be caused by the small wire moving distance. Since the existing cam disc can only drive the wire strip to move back and forth in a small range, the local groove of the roller is deep, and the other surfaces of the roller are not fully utilized. After the maintenance time and cost accounting data statistics: the average service life of the roller rubber sleeve is 5 years, the normal grinding cycle of the roller is 1-2 months / time, about 9 times a year, and the roller grinding reaches 45 times, it reaches the scrap standard, but due to the small wire moving distance, the groove of the roller is deep, and the surface depth of each grinding is 1.5 times the normal one. The actual service life of the roller is only 3 years, and the service life is only 60% of the ideal standard. The cost increased by 67%. In addition, due to the increase in the wire moving load, the existing cam disc will still have wire jitter when driven for a long time, and the operation is relatively unstable. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a new type of wire shifting wheel for a texturing machine which can effectively enlarge the wire shifting spacing and reduce or even avoid wire strip shaking.

[0005] The present invention also provides a wire moving assembly including the above-mentioned wire moving wheel, which can drive the wire strip to reciprocate linearly on the leather roller, and can maximize the wire moving distance, reduce the local wear of the wire strip on the leather roller, extend the service life of the leather roller, improve work efficiency and reduce production costs.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A wire shifting wheel for a texturizing machine, the wire shifting wheel comprising a wheel body, an axial hole formed on the wheel body, and a guide limiting groove formed on the wheel body, the guide limiting groove surrounds the axial hole and is arranged concentrically with the axial hole; wherein the guide limiting groove comprises a guide inner ring, a guide outer ring, and an annular groove formed between the guide inner ring and the guide outer ring, the axial hole being arranged in the middle of the guide inner ring;

[0008] The groove includes n component grooves, n is an integer greater than or equal to 1, and each group of the sub-grooves includes a first sub-groove, a second sub-groove and two third sub-grooves, and are connected in sequence in the following order: the first sub-groove, the third sub-groove, the second sub-groove and the third sub-groove; the width of the groove is the same at all places, and the distance between the center of the third sub-groove along its own width direction and the center of the axial hole is greater than the distance between the center of the first sub-groove along its own width direction and the center of the axial hole and is smaller than the distance between the center of the second sub-groove along its own width direction and the center of the axial hole.

[0009] According to some preferred and specific aspects of the present invention, n is 1 or 2 or 3.

[0010] According to some preferred aspects of the present invention, the central angle angle corresponding to the first sub-groove and the central angle angle corresponding to the second sub-groove respectively account for 1 / 12-1 / 6 of the central angle angle corresponding to the sub-groove.

[0011] Furthermore, a central angle angle corresponding to the first sub-groove is the same as a central angle angle corresponding to the second sub-groove.

[0012] According to some preferred aspects of the present invention, the sidewalls of the first sub-groove and the second sub-groove are respectively elliptical arc structures or circular arc structures, and the sidewall of the third sub-groove is a circular arc structure.

[0013] According to some preferred aspects of the present invention, the one first sub-groove, the one second sub-groove and the two third sub-grooves are integrally formed to constitute the sub-groove, and the n component grooves are integrally formed to constitute the groove.

[0014] According to some preferred aspects of the present invention, the bottom of the groove is a smooth plane.

[0015] According to some preferred aspects of the present invention, the width of the groove is a, the distance between the center of the axial hole and the center line of the groove along its own width direction is b, and b is greater than or equal to 2a and less than or equal to 10a.

[0016] According to some preferred aspects of the present invention, the wire shifting wheel further comprises grease layers respectively arranged on the side walls and the bottom of the groove, and the material of the grease layer is molybdenum disulfide.

[0017] According to some preferred aspects of the present invention, the axial hole includes a clearance hole and a limiting hole connected to the clearance hole, the cross-section of the clearance hole is circular, the clearance hole is concentrically arranged with the guide limiting groove, and the cross-section of the limiting hole is square.

[0018] The present invention also provides a wire moving assembly for driving a wire strip to move back and forth linearly on a roller, the wire moving assembly comprising: a wire moving rod for driving a wire strip to move back and forth linearly on the roller, the wire moving rod being formed with a plurality of wire strip limiting grooves for accommodating and limiting the wire strip;

[0019] A transmission member, used to drive the screw moving rod to reciprocate and move linearly;

[0020] The wire shifting wheel described above;

[0021] A roller, which is arranged in the guide limit groove of the wire shifting wheel and can roll relative to the guide limit groove, the guide limit groove can drive the roller to reciprocate linearly, and the roller is in rolling contact with the guide inner ring, the guide outer ring and the bottom of the inner part of the groove respectively;

[0022] And a driving mechanism and a support rod for driving the wire moving wheel to rotate, one end of the transmission member is connected to the wire moving rod, and the other end is connected to the roller, the transmission member is slidably arranged on the support rod, and the extension direction of the support rod is the same as the reciprocating linear motion direction of the wire moving rod.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0024] In practice, although the existing cam plate driven wire moving can achieve reciprocating motion of the wire strip on the leather roller to a certain extent, after a short period of use, there is still severe wear and tear on the local position of the leather roller. After research and analysis, the applicant found that it is because the wire moving spacing is still too small, resulting in the wire strip being able to reciprocate only in a local part of the leather roller during the reciprocating motion, while the other surface parts of the leather roller are not fully utilized. Based on the above findings, the present invention provides a new type of wire shifting wheel for a texturizing machine that can effectively enlarge the wire shifting spacing and reduce or even avoid the jitter of the wire strip. The wire shifting wheel innovatively adopts a guide positioning groove to indirectly drive the wire strip to move, and the guide positioning groove is concentrically arranged with the wheel body, especially a unique design is made for the guide positioning groove, the guide positioning groove includes different sub-grooves, by changing the spacing between each sub-groove and the axis of the wheel body, and ensuring that at least one spacing becomes larger and at least one spacing becomes smaller. Due to the existence of the concentric arrangement, the wire shifting wheel can drive the wire strip not only to the left and back and forth from the starting position, but also to the right and back and forth during the rotation process through the difference in spacing, thereby expanding the wire shifting spacing of the wire strip on the leather roller, while the existing cam plate can only realize reciprocating motion to the left or right. At the same time, since the width of each sub-groove is the same, while ensuring stable driving during the rotation of the wire shifting wheel, the jitter of the wire strip can also be reduced, thereby ensuring the continuous stability of the production process, thereby avoiding the serious wear of the leather roller caused by too small wire shifting spacing or jitter, and extending the service life of the leather roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the overall structure of a wire shifting wheel used in a texturing machine according to an embodiment of the present invention;

[0027] Figure 2 It is a top view schematic diagram of a wire shifting wheel used in a texturing machine according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a wire moving assembly according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0030] Among them, 1. wheel body; 2. shaft hole; 21. give way hole; 22. limit hole; 31. guide inner ring; 32. guide outer ring; 33. groove; 331. first sub-groove; 332. second sub-groove; 333. third sub-groove; 4. leather roller; 5. wire strip; 6. wire moving rod; 61. wire strip limit groove; 7. transmission part; 71. first transmission rod; 72. second transmission rod; 8. roller; 9. support rod; 91. guide sliding hole; α, the central angle angle corresponding to the first sub-groove; β, the central angle angle corresponding to the second sub-groove; γ, the central angle angle corresponding to the third sub-groove. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly defined. In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] like Figure 1-2 As shown, this example provides a wire shifting wheel for a texturizing machine, the wire shifting wheel comprising a wheel body 1, an axial hole 2 formed on the wheel body 1, and a guide limiting groove formed on the wheel body 1, the guide limiting groove surrounds the axial hole 2 and is arranged concentrically with the axial hole 2; wherein the guide limiting groove comprises a guide inner ring 31, a guide outer ring 32, and a ring-shaped groove 33 formed between the guide inner ring 31 and the guide outer ring 32, and the axial hole 2 is arranged in the middle of the guide inner ring 31;

[0037] The groove 33 includes n component grooves, where n is an integer greater than or equal to 1, and each component groove includes a first sub-groove 331, a second sub-groove 332 and two third sub-grooves 333, and are connected in sequence in the following order: the first sub-groove 331, the third sub-groove 333, the second sub-groove 332 and the third sub-groove 333; the width of the groove 33 is the same at all places (that is, the widths of the first sub-groove 331, the second sub-groove 332 and the third sub-groove 333 are the same each other), and the distance between the center of the third sub-groove 333 along its own width direction and the center of the shaft hole 2 is greater than the distance between the center of the first sub-groove 331 along its own width direction and the center of the shaft hole 2 and is smaller than the distance between the center of the second sub-groove 332 along its own width direction and the center of the shaft hole 2.

[0038] In this example, the center of the first sub-groove 331 along its own width direction refers to any point on the center line of the first sub-groove 331 along its own width direction. Since the sub-grooves themselves or between them are set with equal widths in this example, that is, in fact, the distances between any point on the aforementioned center line and the center of the axis are equal, the above expression is used for ease of description. The center of the second sub-groove 332 along its own width direction and the center of the third sub-groove 333 along its own width direction are the same as above.

[0039] In practice, although the existing cam plate driven wire moving can achieve reciprocating motion of the wire strip on the leather roller to a certain extent, after a short period of use, there is still severe wear and tear on the local position of the leather roller. After research and analysis, the applicant found that it is because the wire moving spacing is still too small, resulting in the wire strip being able to reciprocate only in a local part of the leather roller during the reciprocating motion, while the other surface parts of the leather roller are not fully utilized. Based on the above findings, the present invention provides a new type of wire shifting wheel for a texturizing machine that can effectively enlarge the wire shifting spacing and reduce or even avoid the jitter of the wire strip. The wire shifting wheel innovatively adopts a guide positioning groove to indirectly drive the wire strip to move, and the guide positioning groove is concentrically arranged with the wheel body 1, especially a unique design is made for the guide positioning groove, the guide positioning groove includes different sub-grooves, by changing the spacing between each sub-groove and the axis of the wheel body 1, and ensuring that at least one spacing becomes larger and at least one spacing becomes smaller, due to the existence of the concentric arrangement, the wire shifting wheel can drive the wire strip not only to the left and back and forth from the starting position, but also to the right and back and forth during the rotation process through the difference in spacing, thereby expanding the wire shifting spacing of the wire strip on the leather roller, while the existing cam plate can only realize reciprocating motion to the left or right, and at the same time, since the width of each sub-groove is the same, while ensuring stable drive during the rotation of the wire shifting wheel, the jitter of the wire strip can also be reduced, ensuring the continuous stability of the production process, thereby avoiding the serious wear of the leather roller caused by too small wire shifting spacing or jitter, and extending the service life of the leather roller.

[0040] As some embodiments, n is 1 or 2 or 3. In this example, n is 1, such as Figure 1-2 As shown, the groove 33 includes only one group of grooves. In fact, the groove 33 in this example is equivalent to the sub-groove. The groove 33 is formed by a first sub-groove 331, a second sub-groove 332 and two third sub-grooves 333, and is connected in sequence in the following order: the first sub-groove 331, the third sub-groove 333, the second sub-groove 332 and the third sub-groove 333; wherein the first sub-groove 331 and the second sub-groove 332 are arranged opposite to each other, and the two third sub-grooves 333 are respectively arranged between the first sub-groove 331 and the second sub-groove 332 and all form a ring shape. The function of the first sub-groove 331 is to indirectly drive the wire strip to reciprocate in one direction of the left or the right during the rotation of the wire shifting wheel. The function of the second sub-groove 332 is to indirectly drive the wire strip to reciprocate in the other direction of the left or the right during the rotation of the wire shifting wheel. The third sub-groove 333 exists as a smooth transition to avoid directly turning to the right after turning to the left or directly turning to the left after turning to the right, thereby reducing the possibility of wire strip shaking.

[0041] In this example, the central angle angle α corresponding to the first sub-groove 331 and the central angle angle β corresponding to the second sub-groove 332 respectively account for 1 / 12-1 / 6 of the central angle angle corresponding to the sub-groove. Figure 1-2 As shown, the central angle angle corresponding to the sub-groove is 360°, the central angle angle α corresponding to the first sub-groove 331 and the central angle angle β corresponding to the second sub-groove 332 are respectively approximately 60°, and the central angle angle γ corresponding to the third sub-groove 333 is approximately 120°, which can not only increase the wire moving distance, but also ensure a smooth transition during the wire moving process to avoid shaking of the wire strip.

[0042] Specifically, the side walls of the first sub-groove 331 and the second sub-groove 332 are respectively elliptical arc structures or circular arc structures, and the side wall of the third sub-groove 333 is a circular arc structure. Figure 1 or Figure 2 As shown, the outer contour of the guide inner ring 31 in this example is similar to a peach shape, the first sub-groove 331 is concave inward relative to the third sub-groove 333, and the second sub-groove 332 is convex outward relative to the third sub-groove 333. The design of the elliptical arc structure or the circular arc structure is conducive to ensuring that jitter is reduced during the wire moving process.

[0043] Specifically, the bottom of the groove 33 is a smooth plane, and the wire shifting wheel also includes a grease layer respectively arranged on the side wall and the bottom of the groove 33. The material of the grease layer is molybdenum disulfide, which ensures the smoothness of each surface and reduces the wear caused by excessive friction during operation. The grease layer can be replaced or replenished regularly.

[0044] In this example, the width of the groove 33 is a, the distance between the center of the axial hole 2 and the center line of the groove 33 along its own width direction is b, b is greater than or equal to 2a and less than or equal to 10a. Such a setting can better ensure that the equipment driven by the groove 33 can run at a stable and reasonable speed in the groove 33 within a controllable time.

[0045] In this example, the shaft hole 2 includes a clearance hole 21 and a limiting hole 22 connected to the clearance hole 21. The cross-section of the clearance hole 21 is circular. The clearance hole 21 is concentrically arranged with the guide limiting groove. The cross-section of the limiting hole 22 is square. The clearance hole 21 allows the shaft to pass through. The design of the limiting hole 22 can ensure a firm fit with the drive shaft, which is conducive to driving the wire shifting wheel to rotate stably and smoothly.

[0046] To facilitate understanding of the working principle of the above-mentioned wire shifting wheel, further, as Figure 3-4 As shown, this example also provides a wire moving assembly including the wire moving wheel, which is used to drive the wire strip 5 to reciprocate linearly on the roller 4. The wire moving assembly includes: a wire moving rod 6, which is used to drive the wire strip 5 to reciprocate linearly on the roller 4. The wire moving rod 6 is formed with a plurality of wire strip limiting grooves 61 for accommodating and limiting the wire strip 5;

[0047] The transmission member 7 is used to drive the screw rod 6 to reciprocate linearly;

[0048] The above-mentioned wire shifting wheel;

[0049] The roller 8 is arranged in the guide limit groove of the wire shifting wheel and can roll relative to the guide limit groove. The guide limit groove can drive the roller 8 to reciprocate linearly. The roller 8 is in rolling contact with the bottom of the guide inner ring 31, the guide outer ring 32 and the inner part of the groove 33 respectively;

[0050] And a driving mechanism (not shown) and a support rod 9 for driving the wire moving wheel to rotate. One end of the transmission member 7 is connected to the wire moving rod 6, and the other end is connected to the roller 8. The transmission member 7 is slidably arranged on the support rod 9, and the extension direction of the support rod 9 is the same as the reciprocating linear motion direction of the wire moving rod 6.

[0051] In this example, a guide sliding hole 91 is provided on the support rod 9, and the transmission member 7 passes through the guide sliding hole 91 and is slidably arranged relative to the guide sliding hole 91; further, the transmission member 7 includes a first transmission rod 71 and a second transmission rod 72, the first transmission rod 71 is inserted in the guide sliding hole 91 and is slidably arranged relative to the guide sliding hole 91, one end of the second transmission rod 72 is connected to the first transmission rod 71, and the other end is rotatably connected to the roller, and the guide sliding hole 91 can both guide the movement of the transmission member 7 and limit the transmission member 7 to avoid deviation or change in movement direction; specifically, the support rod 9 has two side-by-side arrangements, the first transmission rod 71 respectively passes through the guide sliding holes 91 respectively provided by the two support rods 9, and the screw rod 6 is connected to the part of the first transmission rod 71 located between the two support rods 9.

[0052] like Figure 3-4 As shown, the first transmission rod 71 extends in the horizontal direction, and the second transmission rod 72 extends in the vertical direction; a plurality of wire limiting grooves 61 are arranged in sequence in parallel along the extension direction of the wire moving rod 6.

[0053] In this example, roller 8 is arranged in the guide limit groove, and the two sides of roller 8 are in rolling contact with the side walls of the guide limit groove respectively, and the bottom of roller 8 is in rolling contact with the bottom inside the guide limit groove. In this way, roller 8 can be restricted in the guide limit groove but will not be restricted from rolling. The two can be in rolling contact during the rotation of the wire shifting wheel to reduce friction, and the roller 8 will not deviate or jitter in the process of driving the roller 8 to move left or right, thereby reducing the possibility of wire jitter and avoiding the situation where the wire shifting wheel rotates but it is difficult to drive the wire to reciprocate. The size of roller 8 and the width or depth of the guide limit groove can be adjusted according to the production process.

[0054] In this example, the second transmission rod 72 is pressed on the roller 8 and the roller 8 is rotatably connected, that is, the roller 8 is located between the second transmission rod 72 and the wire shifting wheel, which can further prevent the roller 8 from escaping from the guide limit groove.

[0055] The driving mechanism may include a driving motor and a shaft drivingly connected to the driving motor. The shaft is arranged in the shaft hole 2. The structure of the matching part between the shaft and the shaft hole 2 corresponds to the special design structure of the shaft hole 2 to achieve stable and smooth driving.

[0056] Specifically, when working, the wire moving wheel is driven to rotate by the driving mechanism. During the rotation of the wire moving wheel, based on the change in the distance between each sub-groove and the center of the shaft hole 2, when the wire moving wheel rotates to the first sub-groove 331 to cooperate with the roller 8, since the first sub-groove 331 is concave inward, the roller 8 will be driven to move left while rolling. The left movement of the roller 8 can drive the second transmission rod 72 to the left, and then drive the first transmission rod 71 to the left, and then the first transmission rod 71 drives the wire moving rod 6 to the left, and finally the wire moving rod 6 is driven to the left. The thread strip 5 moves to the left by the thread moving rod 6, and when the roller 8 is located in the middle of the first sub-groove 331, it reaches the limit position of moving to the left. Finally, when the thread moving wheel continues to rotate and the roller 8 comes out of the first sub-groove 331, due to the change in the spacing, the thread strip 5 has returned to the initial position (the middle position of the roller), and then passes through a transitional third sub-groove 333, and runs smoothly until the thread moving wheel rotates to the second sub-groove 332 to cooperate with the roller 8. When the roller 8 is in the middle of the second sub-groove 332, it reaches the limit position of moving to the right. Finally, when the wire moving wheel 8 continues to rotate and the roller 8 comes out of the second sub-groove 332, the wire strip 5 has returned to its initial position due to the change in spacing. Then, it passes through a third sub-groove 333 of transition and runs smoothly. This reciprocating process realizes the continuous and stable reciprocating motion of the wire strip 5 in the production process. The wire moving spacing becomes larger and can basically cover the surface of the leather roller 4 to avoid defects caused by repeated friction in some parts. The whole process runs stably and there is almost no shaking of the wire strip 5, which ensures the continuous stability of the production process.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A wire moving assembly, characterized in that: The wire moving assembly comprises: The screw moving rod is used to drive the silk strip to reciprocate linearly on the roller, and the screw moving rod is formed with a plurality of silk strip limiting grooves for accommodating and limiting the silk strip; A transmission member, used to drive the screw moving rod to reciprocate and move linearly; A wire shifting wheel; the wire shifting wheel comprises a wheel body, an axial hole formed on the wheel body, and a guide limit groove formed on the wheel body, wherein the guide limit groove surrounds the axial hole and is arranged concentrically with the axial hole; wherein the guide limit groove comprises an inner guide ring, an outer guide ring, and an annular groove formed between the inner guide ring and the outer guide ring, wherein the axial hole is arranged in the middle of the inner guide ring; the groove comprises n component grooves, wherein n is an integer greater than or equal to 1, and each group of the sub-grooves comprises a first sub-groove, a second sub-groove, and two third sub-grooves, and are connected in sequence in the following order Connected: the first sub-groove, the third sub-groove, the second sub-groove and the third sub-groove; the widths of the grooves are the same at all places, the distance between the center of the third sub-groove along its own width direction and the center of the shaft hole is greater than the distance between the center of the first sub-groove along its own width direction and the center of the shaft hole and is smaller than the distance between the center of the second sub-groove along its own width direction and the center of the shaft hole; the width of the groove is a, the distance between the center of the shaft hole and the center line of the groove along its own width direction is b, b is greater than or equal to 2a and less than or equal to 10a; A roller, which is arranged in the guide limit groove of the wire shifting wheel and can roll relative to the guide limit groove, the guide limit groove can drive the roller to reciprocate linearly, and the roller is in rolling contact with the guide inner ring, the guide outer ring and the bottom of the inner part of the groove respectively; And a driving mechanism and a support rod for driving the wire moving wheel to rotate, the support rod is provided with a guide sliding hole; the transmission member includes a first transmission rod extending in a horizontal direction and a second transmission rod extending in a vertical direction, the first transmission rod is inserted in the guide sliding hole and can be slidably arranged relative to the guide sliding hole, one end of the second transmission rod is connected to the first transmission rod, and the other end is rotationally connected to the roller, the wire moving rod is connected to the first transmission rod, and the extension direction of the support rod is the same as the reciprocating linear motion direction of the wire moving rod.

2. The wire moving assembly according to claim 1, characterized in that: n is 1 or 2 or 3.

3. The wire moving assembly according to claim 1, characterized in that: The central angle angle corresponding to the first sub-groove and the central angle angle corresponding to the second sub-groove respectively account for 1 / 12-1 / 6 of the central angle angle corresponding to the sub-groove.

4. The wire moving assembly according to claim 1, characterized in that: The central angle of the first sub-groove is the same as the central angle of the second sub-groove.

5. The wire moving assembly according to claim 1, characterized in that: The side walls of the first sub-groove and the second sub-groove are respectively elliptical arc structures or circular arc structures, and the side wall of the third sub-groove is a circular arc structure.

6. The wire moving assembly according to claim 1, characterized in that: The one first sub-groove, one second sub-groove and two third sub-grooves are integrally formed to form the sub-groove, and the n component grooves are integrally formed to form the groove.

7. The wire moving assembly according to claim 1, characterized in that: The bottom of the groove is a smooth plane; and / or the wire shifting wheel further comprises grease layers respectively arranged on the side wall and the bottom of the groove, and the material of the grease layer is molybdenum disulfide.

8. The wire moving assembly according to claim 1, characterized in that: The shaft hole comprises a clearance hole and a limiting hole connected with the clearance hole, the cross section of the clearance hole is circular, the clearance hole is concentrically arranged with the guide limiting groove, and the cross section of the limiting hole is square.

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