Wire drum device and automatic threading device for power wire wall wire pipe

Abstract

The utility model relates to a wire drum device and an automatic threading apparatus for a power wire wall wire tube. A cable is wound on a wire drum rotating shaft, and the cable is limited between the wire drum rotating shaft and a rolling body; according to the distance between each rolling body and the traction end of the cable, the rolling body closest to the traction end is the first rolling body, and the rolling body farthest from the traction end is the Nth rolling body; a preset distance is formed between the rotating axis of each rolling body and the rotating axis of the drum rotating shaft, and the preset distances are sequentially reduced from the first rolling body to the Nth rolling body. The stress condition of the rolling body is obviously improved, the abrasion of the rolling body is less, the resistance of the cable is reduced, the curvature change of the cable is smoother and the pushing process is smoother in the process of pushing the cable by adopting the cable drum rotating shaft, and the overall service life is favorably prolonged; when the wire is pushed from the tightening state, the invalid rotation stroke of the wire drum rotating shaft is reduced, and the threading efficiency is improved; and the mechanism design is ingenious, and income can be obtained almost without increasing extra cost.

Description

Technical Field

[0001] The present application relates to the field of wire threaders, and in particular to a wire drum device and an automatic wire threader for a wall wire tube of a power wire. Background Art

[0002] The wire threader is used to pull the wire rope in the pipeline, such as pulling the power wire in the wall wire tube of the power wire. The wire threader has the advantages of saving time, labor and improving work efficiency. It can be used for cleaning telecommunication pipelines and laying optical cables, cables and plastic sub-pipes, etc. However, the traditional wire threader has the problems of poor bending ability and high failure rate.

[0003] To solve this problem, a Chinese patent application with publication number CN111668762A discloses an automatic wire threader for wall conduits of electric power lines, which includes a wire winding reel, a wire winding reel seat, and a driving mechanism for driving the wire winding reel to rotate circumferentially along the wire winding reel seat, wherein the wire winding reel is sleeved outside the wire winding reel; a plurality of rolling elements for guiding are arranged circumferentially on the wire winding reel, and a traction device is provided at the coil output end on the wire winding reel, the outer ring of the wire winding reel is a gear structure, and a reversing wheel is meshed with the wire winding reel near the traction device, and the reversing wheel is meshed with an acceleration wheel, and the acceleration wheel is arranged in contact with the traction device. This invention sets an acceleration wheel at the outlet. When the traction device is fast in the process of releasing the wire and is subject to strong instantaneous resistance, it can reduce the probability of deformation and backlog of the traction device due to excessive rotation of the winding drum inside the threader, thereby achieving quick and effective threading to the ideal position, and can reduce the probability of damage and scrapping of the threader, ensuring the service life of the threader. A reversing wheel is set at the coil output end of the winding drum, i.e., the coil outlet, to freely realize winding and unwinding. This patent document adopts a rolling system in which the distance from the center axis of each rolling body to the center axis of the wire drum is equal, that is, the rolling body has the same distance from the rotating shaft of the wire drum, that is, the rolling body is arranged at the same radius relative to the center axis of the wire drum.

[0004] As shown in FIG. 1 , a conventional wire drum device 100 comprises a wire drum shaft 200 and a cable 300 wound on the wire drum shaft 200 , and a rolling body 400 is disposed on the outer ring. In conjunction with FIGS. 2 and 3 , the cable 300 has a wire end 310 extending beyond the constraint range of the entire rolling body 400 , that is, one end of the cable 300 extends out of the wire drum device 100 .

[0005] In practical applications, since the cable 300 is spirally wound on the drum shaft 200 , there will be gaps between the rolling elements 400 arranged with the same radius. Specifically, the number of rolling bodies 400 of the wire drum device 100 shown in the figure is 17, including a first rolling body 401, a second rolling body 402, a third rolling body 403, a fourth rolling body 404, a fifth rolling body 405, a sixth rolling body 406, a seventh rolling body 407, an eighth rolling body 408, a ninth rolling body 409, a tenth rolling body 410, an eleventh rolling body 411, a twelfth rolling body 412, a thirteenth rolling body 413, a fourteenth rolling body 414, a fifteenth rolling body 415, a sixteenth rolling body 416 and a seventeenth rolling body 417. Relative to the rotation axis of the wire drum shaft 200, each rolling body 400 has the same distance, that is, the rotation axis of each rolling body 400 has the same spacing with the rotation axis of the wire drum shaft 200, for example, the first spacing R1, the sixth spacing R6 and the sixteenth spacing R16 are the same, and the remaining spacings are similar. However, since the cable 300 is spirally wound on the drum shaft 200, i.e., the spool, the cable 300 at the innermost circle position has a first gap D1, a second gap D2, and a third gap D3 that change with the winding direction, and the first gap D1, the second gap D2, and the third gap D3 increase sequentially; wherein, along the winding direction, the first gap D1 is closest to the winding starting end 330 of the cable 300, and the third gap D3 is farthest from the winding starting end 330 of the cable 300.

[0006] In actual application, it is found that the distances between the rolling body 400 at different positions and the outer ring cable 320 at the outermost position of the wire drum device 100 are different. In the direction of the cable length, in the outer ring cable 320 at the outermost position, the closer the position is to the wire end 310, the smaller the distance between the rolling body 400 and the outer ring cable 320, and the closer the position is to the wire end 310, the larger the distance between the rolling body 400 and the outer ring cable 320. As shown in FIG3 , the fourth gap D4, the fifth gap D5 and the sixth gap D6 increase in sequence; among them, the seventh rolling body 407 at the fourth gap D4 is closest to the wire end 310 along the cable length direction, and the seventeenth rolling body 417 at the sixth gap D6 is farthest from the wire end 310 along the cable length direction.

[0007] However, when pushing the wire, as shown in FIG. 4 , the cable 300 will transmit force along its own length direction, and will first stretch the outermost cable 300 outward along the diameter direction of the wire drum shaft 200. The position change is shown by the dotted line. Within a certain stroke, the distance between the outermost cable 300 and the rolling body 400 will be filled first, almost making the outer side of the outer cable 320 at the outermost position contact each rolling body 400, and then the cable 300 can be effectively pushed out. In this process, some invalid strokes are generated, affecting efficiency. On the other hand, the process of the cable 300 first stretching and then being folded back to a smaller curvature will also consume some energy and do useless work. On the other hand, the rolling body 400 close to the cable 300 is subjected to greater pressure, and the friction between the cable 300 and the rolling body 400 is also greater, resulting in more wear, which will cause the rolling body 400 to have a shorter service life and greater overall resistance. Utility Model Content

[0008] Based on this, it is necessary to provide a wire drum device and an automatic wire threader for a power wire wall tube.

[0009] In some embodiments, a wire drum device includes a wire drum shaft, a cable and a rolling body, wherein the cable is wound around the wire drum shaft, and the cable is limited between the wire drum shaft and the rolling body; and

[0010] Along the length direction of the cable, the rolling bodies are sorted from small to large according to the distance between each rolling body and the traction end of the cable. The rolling body closest to the traction end is the first rolling body, and the rolling body farthest from the traction end is the Nth rolling body, where N is a natural number greater than 2;

[0011] A rotation axis of each rolling body has a preset distance from the rotation axis of the drum shaft, and the preset distance decreases sequentially from the first rolling body to the Nth rolling body.

[0012] The above-mentioned wire drum device, on the one hand, reduces the resistance of the cable when pulling the wire, and the distance between all the rolling elements on the surrounding sides and the outermost circle of wire is equal, which significantly improves the stress condition of the rolling elements, reduces the wear of the rolling elements and the wear is relatively balanced, and the overall service life is longer; on the other hand, in the process of using the wire drum shaft to push the wire, the curvature of the cable changes more slowly, further reducing the resistance of the cable, and the pushing process is smoother, which is conducive to further improving the overall service life; on the other hand, when pushing the wire from the tightened state, the ineffective rotation stroke of the wire drum shaft is reduced, thereby improving the threading efficiency; on the other hand, the mechanism is cleverly designed, and benefits can be obtained without adding almost any additional cost, and it is easy to promote and apply.

[0013] In some embodiments, the preset spacing decreases sequentially from the first rolling element to the Nth rolling element, so that the outer ring cable of the cable contacts each of the rolling elements.

[0014] In some embodiments, the preset spacing forms a decreasing arithmetic progression from the first rolling element to the Nth rolling element.

[0015] In some embodiments, the difference between the preset spacings between two adjacent rolling bodies is set according to the thickness t of the cable.

[0016] In some of the embodiments, the difference of the preset spacing between two adjacent rolling bodies is set according to the thickness t of the cable and the angle θ between two adjacent rolling bodies.

[0017] In some embodiments, the difference between the preset spacings of two adjacent rolling elements is the quotient of the product of the thickness t and the angle θ and 360 degrees.

[0018] In some embodiments, along the cable winding direction, the cable drum shaft is thickened to contact the inner coil of the cable.

[0019] In some of the embodiments, the number of the rolling elements is set according to the stiffness of the cable.

[0020] In some embodiments, except for the angle between the first rolling body and the Nth rolling body, the angles θ between other two adjacent rolling bodies are equal.

[0021] In some embodiments, an automatic wire threader for a wall conduit of an electric power line comprises a driving structure and a wire drum device as described in any embodiment, wherein the driving structure drives a wire drum rotating shaft connected to the wire drum device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] FIG. 1 is a schematic structural diagram of a conventional wire drum device.

[0024] FIG. 2 is another schematic diagram of the wire drum device shown in FIG. 1 .

[0025] FIG. 3 is another schematic diagram of the identification of the wire drum device shown in FIG. 1 .

[0026] FIG. 4 is a schematic diagram of the wire drum device shown in FIG. 1 in use state.

[0027] FIG. 5 is a schematic structural diagram of an embodiment of the wire drum device and the automatic wire threader for the wall wire tube of the power wire described in the present application.

[0028] FIG. 6 is another schematic diagram of identification of the embodiment shown in FIG. 5 .

[0029] FIG. 7 is another schematic diagram of identification of the embodiment shown in FIG. 5 .

[0030] Reference numerals: wire drum device 100, wire drum shaft 200, cable 300, traction end 310, outer ring cable 320, winding start end 330, inner ring cable 340, rolling body 400, first rolling body 401, second rolling body 402, third rolling body 403, fourth rolling body 404, fifth rolling body 405, sixth rolling body 406, seventh rolling body 407, eighth rolling body 408, ninth rolling body 409, tenth rolling body 410, eleventh rolling body 411, twelfth rolling body 412, thirteenth rolling body 413, fourteenth rolling body 414, fifteenth rolling body 415, The sixteenth rolling body 416, the seventeenth rolling body 417, the cable winding direction 500, the first gap D1, the second gap D2, the third gap D3, the fourth gap D4, the fifth gap D5, the sixth gap D6, the first spacing R1, the second spacing R2, the third spacing R3, the fourth spacing R4, the fifth spacing R5, the sixth spacing R6, the seventh spacing R7, the eighth spacing R8, the ninth spacing R9, the tenth spacing R10, the eleventh spacing R11, the twelfth spacing R12, the thirteenth spacing R13, the fourteenth spacing R14, the fifteenth spacing R15, the sixteenth spacing R16, and the seventeenth spacing R17. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application 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 application, so the present application is not limited by the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly 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.

[0035] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0036] The present application discloses a wire drum device and an automatic wire threader for a wall wire tube of an electric power line, which include some or all of the technical features of the following embodiments; that is, the wire drum device and the automatic wire threader for a wall wire tube of an electric power line include some or all of the following structures. In some embodiments of the present application, a wire drum device includes a wire drum shaft, a cable and a rolling body, wherein the cable is wound on the wire drum shaft, and the cable is limited between the wire drum shaft and the rolling body; and, along the length direction of the cable, according to the distance between each of the rolling bodies and the traction end of the cable, they are sorted from small to large, the rolling body closest to the traction end is the first rolling body, and the rolling body farthest from the traction end is the Nth rolling body, wherein N is a natural number greater than 2; the rotation axis of each of the rolling bodies has a preset spacing with the rotation axis of the wire drum shaft, and the preset spacing decreases sequentially from the first rolling body to the Nth rolling body. The above-mentioned wire drum device, on the one hand, reduces the resistance of the cable when pulling the wire, and the distance between all the rolling elements on the surrounding sides and the outermost circle of wire is equal, which significantly improves the stress condition of the rolling elements, reduces the wear of the rolling elements and the wear is relatively balanced, and the overall service life is longer; on the other hand, in the process of using the wire drum shaft to push the wire, the curvature of the cable changes more slowly, further reducing the resistance of the cable, and the pushing process is smoother, which is conducive to further improving the overall service life; on the other hand, when pushing the wire from the tightened state, the ineffective rotation stroke of the wire drum shaft is reduced, thereby improving the threading efficiency; on the other hand, the mechanism is cleverly designed, and benefits can be obtained without adding almost any additional cost, and it is easy to promote and apply.

[0037] In some embodiments, a wire drum device 100 is shown in Figure 5, which includes a wire drum shaft 200, a cable 300 and a rolling body 400, wherein the cable 300 is wound on the wire drum shaft 200, and the cable 300 is limited between the wire drum shaft 200 and the rolling body 400; and, unlike the conventional technology shown in Figure 1, the position of each of the rolling bodies 400 in the wire drum device 100 of the present application is set to contact the outer ring cable 320 of the cable 300. With such a structural design, when pushing the wire from a tightened state, it directly presents the use state shown in Figure 4, and there is no need for the wire drum shaft to rotate through a period of invalid rotation stroke after a period of time as shown in the conventional technology in Figure 1 before it can present the use state shown in Figure 4, thereby improving the threading efficiency.

[0038] In each embodiment, along the length direction of the cable, the rolling bodies 400 are arranged from small to large according to the distance between each rolling body 400 and the traction end 310 of the cable 300. The rolling body 400 closest to the traction end 310 is the first rolling body 401, and the rolling body 400 farthest from the traction end 310 is the Nth rolling body, wherein N is a natural number greater than 2; further, in some embodiments, N is a natural number greater than 3, that is, the number of the rolling bodies 400 is at least four. The length direction of the cable, that is, the direction of the cable itself, that is, the direction defined by the cable itself, can also be called the extension direction of the cable itself, is spiral inside the wire drum device 100, and is linear, such as a straight line, outside the wire drum device 100. With such a structural design, when the wire drum shaft 200 is used to pull the wire, the distances between all the rolling elements on all sides and the outermost wire are equal, the forces applied are relatively consistent, and the wear is relatively balanced; while in the process of pushing the wire using the wire drum shaft 200, the curvature of the cable 300 changes more gradually, the resistance of the cable 300 is reduced, and the pushing process is smoother, which is beneficial to increasing the overall service life of the wire drum device 100.

[0039] In conjunction with FIG6 , the wire drum device 100 has 17 rolling bodies 400 , wherein the first rolling body 401 is closest to the traction end 310 , that is, along the length direction of the cable, the first rolling body 401 is the shortest distance from the traction end 310 , the second rolling body 402 is the second shortest distance from the traction end 310 , and so on, the seventeenth rolling body 417 is the longest distance from the traction end 310 , that is, the above-mentioned order is from small to large. In conjunction with FIG5 , it can also be understood that relative to the traction end 310 extending from the outlet of the wire drum device 100 , each of the rolling bodies 400 is ordered in the reverse direction of the cable winding direction 500 , and the first rolling body 401 to the seventeenth rolling body 417 are obtained. In the above embodiment, the number of the rolling bodies 400 is 17; in other embodiments, the number of the rolling bodies 400 is not limited to 17, and can be 9, 10, 12, 16, 20, 40 or 81, etc. In some embodiments, the number of the rolling bodies 400 is set according to the stiffness of the cable 300, that is, the value of N is set according to the stiffness of the cable 300. Undoubtedly, when the wire drum device 100 is larger and the number of rolling bodies 400 is greater, the beneficial effect of the present application relative to the conventional technology is better. Moreover, with such a structural design, the arrangement of the rolling bodies 400 adopts an innovative spiral distribution, which significantly improves the stress condition of the rolling bodies 400, reduces the wear of the rolling bodies 400, reduces the resistance of the cable 300, increases the service life, improves the smoothness of the wire pushing, and reduces the ineffective rotation stroke of the wire drum shaft 200.

[0040] In each embodiment, there is a preset distance between the rotation axis of each rolling body 400 and the rotation axis of the wire drum shaft 200. It can be understood that the rolling body 400 can be rotatably arranged, and it has a rotation axis shown in the figure as the rotation center, that is, the center of the rotation axis; similarly, the wire drum shaft 200 can also be rotatably arranged, and it also has a rotation axis; the distance from the rotation axis of the rolling body 400 to the rotation axis of the wire drum shaft 200 is the preset distance.

[0041] In each embodiment, the preset spacing decreases sequentially from the first rolling body 401 to the Nth rolling body. In some embodiments, the preset spacing decreases sequentially from the first rolling body 401 to the Nth rolling body, so that the outer ring cable 320 of the cable 300 contacts each of the rolling bodies 400. In some embodiments, as shown in Figures 6 and 7, the preset spacing of the first rolling body 401, i.e., the first spacing R1, is the largest, the preset spacing of the second rolling body 402, i.e., the second spacing R2, is the second, and then the preset spacing of the third rolling body 403, i.e., the preset spacing of the fourth rolling body 404, i.e., the fourth spacing R4, the preset spacing of the fifth rolling body 405, i.e., the fifth spacing R5, the preset spacing of the sixth rolling body 406, i.e., the sixth spacing R6, the preset spacing of the seventh rolling body 407, i.e., the seventh spacing R7, the preset spacing of the eighth rolling body 408, i.e., the eighth spacing R8, the preset spacing of the ninth rolling body 409, i.e., the ninth spacing R9, the preset spacing of the tenth rolling body 410, i.e., the tenth spacing R10, the preset spacing of the eleventh rolling body 411, i.e., the eleventh spacing R11, the preset spacing of the twelfth rolling body 412, i.e., the twelfth spacing R12, and the preset spacing of the thirteenth rolling body 413. The preset spacing of the rolling body 413 is the thirteenth spacing R13, the preset spacing of the fourteenth rolling body 414 is the fourteenth spacing R14, the preset spacing of the fifteenth rolling body 415 is the fifteenth spacing R15, the preset spacing of the sixteenth rolling body 416 is the sixteenth spacing R16, and the preset spacing of the seventeenth rolling body 417 is the seventeenth spacing R17, that is, the seventeenth spacing R17 is the smallest; that is, the preset spacings corresponding to the first rolling body 401, the second rolling body 402, the third rolling body 403, the fourth rolling body 404, the fifth rolling body 405, the sixth rolling body 406, the seventh rolling body 407, the eighth rolling body 408, the ninth rolling body 409, the tenth rolling body 410, the eleventh rolling body 411, the twelfth rolling body 412, the thirteenth rolling body 413, the fourteenth rolling body 414, the fifteenth rolling body 415, the sixteenth rolling body 416 and the seventeenth rolling body 417 decrease in order. The same is true for embodiments with other numbers of rolling elements 400. Such a structural design reduces the ineffective rotation stroke of the drum shaft 200 when pushing the wire from the tightened state, thereby improving the threading efficiency. In addition, the overall structural design of the drum device 100 is ingenious, and benefits can be obtained without adding additional costs, and it is easy to promote and apply.

[0042] In some embodiments, from the first rolling element 401 to the Nth rolling element, the preset spacing is a decreasing arithmetic progression. Taking FIG. 7 as an example, the first gap D1, the second gap D2, the third gap D3, the fourth gap D4, the fifth gap D5, the sixth gap D6, the first spacing R1, the second spacing R2, the third spacing R3, the fourth spacing R4, the fifth spacing R5, the sixth spacing R6, the seventh spacing R7, the eighth spacing R8, the ninth spacing R9, the tenth spacing R10, the eleventh spacing R11, the twelfth spacing R12, the thirteenth spacing R13, the fourteenth spacing R14, the fifteenth spacing R15, the sixteenth spacing R16 and the seventeenth spacing R17 are a decreasing arithmetic progression, and the specific tolerance can be set according to the actual situation and requirements, and is not specifically limited here. Such a structural design, on the one hand, improves the stress condition of the rolling body 400 and increases the overall service life of the wire drum device 100; on the other hand, during the process of the wire drum device 100 pushing the wire, the curvature change of the cable 300 is smoother, the resistance of the cable 300 is reduced, and the pushing process is smoother; still further, when pushing the wire from a tightened state, the ineffective stroke of the wire drum device 100 is reduced, thereby improving the user experience.

[0043] In some embodiments, the difference between the preset spacings of two adjacent rolling bodies 400 is set according to the thickness t of the cable 300. That is, the difference between the preset spacings of two adjacent rolling bodies 400 is related to the thickness t of the cable 300. In some embodiments, as shown in FIG6 , the difference between the preset spacings of two adjacent rolling bodies 400 is set according to the thickness t of the cable 300 and the angle θ between two adjacent rolling bodies 400. That is, the difference between the preset spacings of two adjacent rolling bodies 400 is related to the thickness t of the cable 300 and the angle θ between two adjacent rolling bodies 400. In this embodiment, except for the angle between the first rolling body and the Nth rolling body, the angles θ between the other two adjacent rolling bodies 400 are equal. In other embodiments, the angles θ between two adjacent rolling bodies 400 may also be set to be the same or different.

[0044] In some embodiments, the difference between the preset spacings of two adjacent rolling elements 400 is the quotient of the product of the thickness t and the angle θ and 360 degrees.

[0045] △R=t×θ / 360

[0046] Among them, the thickness of the cable 300 is t, the angle between adjacent rolling bodies 400 is θ, the distance between the central axis of the rolling body 400, that is, the rotation axis, and the rotation axis of the wire drum shaft is R, △R is the distance difference between the central axis of the adjacent rolling body and the center of the wire drum shaft, and in this state, the rolling bodies 400 are arranged and distributed in a spiral shape in the wire drum device 100. When pulling the wire, the distance between all the rolling bodies around and the outermost circle wire is equal, the force is relatively consistent, the wear is relatively balanced, and the overall service life is longer. When pushing the wire from the tightened state, the invalid rotation stroke of the wire drum shaft 200 can be reduced, and the user experience can be improved; at the same time, the curvature of the entire cable 300 changes smoothly during the pushing process, and the curvature is in a state of gradual release, so that the resistance gradually decreases, which is conducive to making the cable 300 smoother during the pushing process, less wear of the rolling body 400, and reducing the failure rate.

[0047] Taking the first spacing R1 and the second spacing R2 as an example, the first spacing R1 is greater than the second spacing R2, and the difference between the two is the product of the thickness t of the cable 300 and the angle θ between the two, and then divided by 360 degrees to obtain the quotient; it can also be understood that the difference between the two is the quotient of the angle θ between the two and 360 degrees, and then multiplied by the thickness t of the cable 300 to obtain the product. The above two methods are mathematically equivalent.

[0048] In order to balance the force on the inner circle cable 340 of the cable 300, in some embodiments, the wire drum shaft 200 is thickened along the cable winding direction 500 to contact the inner circle cable 340 of the cable 300, so that there is no gap between the inner circle cable 340 and the wire drum shaft 200, that is, the inner circle cable 340 is fully supported by the wire drum shaft 200. Such a structural design is conducive to providing an internal support environment, so that the inner circle cable 340 can also abut the wire drum shaft 200 without leaving a gap, thereby improving the force balance and protecting the inner circle cable 340. Moreover, the modification is relatively small and easy to promote.

[0049] In some of the embodiments, an automatic wire threader for a wall conduit of an electric power line is also provided, which includes a driving structure and the wire drum device 100 described in any embodiment, wherein the driving structure drives a wire drum shaft 200 connected to the wire drum device 100. In some of the embodiments, the automatic wire threader for a wall conduit of an electric power line includes a driving structure and a wire drum device 100, wherein the wire drum device 100 includes a wire drum shaft 200, a cable 300 and a rolling body 400, wherein the cable 300 is wound around the wire drum shaft 200, and the cable 300 is limited between the wire drum shaft 200 and the rolling body 400; the driving structure drives the wire drum shaft 200; and, along the length direction of the cable, according to the traction of each of the rolling bodies 400 and the cable 300, the wire drum shaft 200 is driven by the driving structure. The distances from the leading end 310 are arranged in ascending order, the rolling body 400 closest to the traction end 310 is the first rolling body 401, and the rolling body 400 farthest from the traction end 310 is the Nth rolling body, wherein N is a natural number greater than 2; the rotation axis of each rolling body 400 has a preset spacing with the rotation axis of the wire drum shaft 200, and the preset spacing decreases sequentially from the first rolling body 401 to the Nth rolling body; the remaining embodiments are analogous and will not be elaborated on. Such a design, on the one hand, reduces the resistance of the cable 300 when the wire is pulled, and the distances between all the rolling elements on the surrounding sides and the outermost wire are equal, which significantly improves the stress condition of the rolling element 400, and the rolling element 400 is less worn and the wear is relatively balanced, and the overall service life is longer; on the other hand, in the process of using the wire drum shaft 200 to push the wire, the curvature of the cable 300 changes more gradually, further reducing the resistance of the cable 300, and the pushing process is smoother, which is conducive to further improving the overall service life; on the other hand, when pushing the wire from the tightened state, the ineffective rotation stroke of the wire drum shaft 200 is reduced, thereby improving the threading efficiency; on the other hand, the mechanism is cleverly designed, and benefits can be obtained without adding any additional costs, and it is easy to promote and apply.

[0050] It should be noted that other embodiments of the present application also include a wire drum device and an automatic wire threader for a wall conduit of a power line that are formed by combining the technical features in the above-mentioned embodiments and can be implemented.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A wire drum device (100), comprising a wire drum shaft (200), a cable (300) and a rolling body (400), wherein the cable (300) is wound around the wire drum shaft (200), and the cable (300) is located between the wire drum shaft (200) and the rolling body (400); characterized in that: Along the length direction of the cable, the rolling bodies (400) are arranged in ascending order according to the distance between each rolling body (400) and the traction end (310) of the cable (300), the rolling body (400) closest to the traction end (310) being the first rolling body (401), and the rolling body (400) farthest from the traction end (310) being the Nth rolling body, wherein N is a natural number greater than 2; A preset distance is provided between the rotation axis of each rolling body (400) and the rotation axis of the drum shaft (200), and the preset distance decreases sequentially from the first rolling body (401) to the Nth rolling body.

2. The wire drum device (100) according to claim 1, characterized in that: The preset spacing decreases sequentially from the first rolling body (401) to the Nth rolling body, so that the outer ring cable (320) of the cable (300) contacts each of the rolling bodies (400).

3. The wire drum device (100) according to claim 2, characterized in that: From the first rolling body (401) to the Nth rolling body, the preset spacing forms a decreasing arithmetic progression.

4. The wire drum device (100) according to claim 1, characterized in that: The difference between the preset spacings of two adjacent rolling bodies (400) is set according to the thickness t of the cable (300).

5. The wire drum device (100) according to claim 4, characterized in that: The difference between the preset spacings of the two adjacent rolling bodies (400) is set according to the thickness t of the cable (300) and the included angle θ between the two adjacent rolling bodies (400).

6. The wire drum device (100) according to claim 5, characterized in that: The difference between the preset spacings of two adjacent rolling bodies (400) is the quotient of the product of the thickness t and the angle θ and 360 degrees.

7. The wire drum device (100) according to claim 1, characterized in that: Along the cable winding direction (500), the cable drum rotating shaft (200) is arranged to be thickened so as to contact the inner circle cable (340) of the cable (300).

8. The wire drum device (100) according to claim 1, characterized in that: The number of the rolling bodies (400) is set according to the stiffness of the cable (300).

9. The wire drum device (100) according to any one of claims 1 to 8, characterized in that: Except for the included angle between the first rolling body and the Nth rolling body, the included angles θ between the other two adjacent rolling bodies (400) are equal.

10. An automatic wire threader for a power wire wall tube, characterized in that: It comprises a driving structure and a wire drum device (100) as claimed in any one of claims 1 to 9, wherein the driving structure drives a wire drum rotating shaft (200) connected to the wire drum device (100).

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