Anti-falling wire passing wheel
By designing and adjusting sliding components, return springs and anti-disengagement components in the reel, the breakage and disengagement problems caused by the speed of wire is solved, and a more stable and durable reel device is achieved.
Patent Information
- Application Number
- CN202411834677.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-11
AI Technical Summary
When the wire speed is fast and slow, the existing wire passes can easily lead to the problem of the wire breaking or breaking away from the wire passes.
An anti-disengagement reel is designed, and a structure such as adjusting sliding components, return springs, positioning frames and magnetic plates are used to absorb the pressure caused by changes in the wire speed through the coordination of the sliding components and return springs to prevent the wire from breaking; at the same time, through the setting of the anti-disengagement component and the barrier ring, the wire is prevented from breaking away from the wire when the speed suddenly slows down.
It effectively prevents the problem of the wire breaking or breaking away from the reel when the speed suddenly changes, improves the stability and service life of the device, and increases the scope of application.
Smart Images

Figure CN119590934A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of wire-passing wheels, in particular to an anti-slip wire-passing wheel. Background Art
[0002] The wire wheel is an important mechanical component widely used in many industrial and civil fields. Its main function is to guide the direction of the cable and reduce the friction and wear of the cable during movement to ensure the smoothness and efficiency of the cable retraction and release operation. The wire wheel needs to be installed outside the bearing when in use. When the wire passes through the inner surface of the groove, the wire wheel rotates with the wire, thereby converting the sliding friction into static friction.
[0003] When the existing wire wheel is in use, the speed of the silk thread may vary. When the speed of the silk thread suddenly increases, the wire wheel is subjected to greater force and the silk thread is easily broken. When the speed of the silk thread suddenly slows down, the silk thread is easy to fall off the wire wheel. Therefore, a wire wheel with anti-falling off is proposed to solve the above problems. Summary of the invention
[0004] The object of the present invention is to provide a wire-slip preventing wheel, so as to solve the problem in the above-mentioned background technology that the wire is easily broken or detached from the wire-slip wheel when the wire speed fluctuates.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A wire-passing prevention wheel comprises a support, a top plate arranged above the support and a driven wheel symmetrically installed at the bottom end of the top plate, an adjusting sliding assembly is installed at the top end of the support, a symmetrically arranged positioning frame is rotatably connected to the rear side of the top plate, a magnetic plate is embedded in the inner side of the positioning frame, and a wire-passing assembly is installed at the front side of the adjusting sliding assembly.
[0007] Preferably, the adjustment sliding assembly includes a sliding frame fixedly connected to the top end of the support, the sliding frame is fixedly connected to the inside of the top plate and passes through the top plate, the bottom end of the inner side of the sliding frame is fixedly connected to a vertically arranged limit column, a return spring is provided on the outer side of the limit column, a first slide plate is slidably connected to the outer surface of the limit column, the first slide plate has first positioning holes symmetrically opened on both sides, an adjustment assembly is provided under the first slide plate, a plurality of second positioning holes symmetrically opened on both sides of the sliding frame, a frame cover is rotatably connected to the top end of the sliding frame, and the frame cover and the rear side of the sliding frame are fixedly connected to symmetrically arranged iron positioning plates.
[0008] Preferably, the adjustment assembly includes a second slide plate slidably connected to the outer surface of the limit column, the second slide plate is fixedly connected to symmetrically arranged fixing plates on the left and right sides, the fixing plate is spirally connected to a first adjustment bolt that passes through the fixing plate, the top of the fixing plate is fixedly connected to a connecting plate, and the connecting plate is spirally connected to a second adjustment bolt that passes through the connecting plate.
[0009] Preferably, the first slide plate and the second slide plate are identical in shape and size, the first slide plate and the second slide plate are both slidably connected to the inner side of the slide frame, the inner diameters of the first positioning hole and the second positioning hole are identical, the outer diameters of the first adjusting bolt and the second adjusting bolt are identical, the inner diameter of the first positioning hole is larger than the outer diameter of the first adjusting bolt, the second adjusting bolt is horizontally aligned with the first positioning hole, and the rear side of the iron positioning plate is magnetically connected to the front side of the magnetic plate.
[0010] Preferably, the wire passing assembly includes a support plate fixedly connected to the front side of the first slide plate, a mounting plate symmetrically arranged up and down is fixedly connected to the front side of the support plate, a vertical plate is provided on the front side of the mounting plate, the outer ring of the first bearing is fixedly connected to the front side of the support plate and the rear side of the vertical plate, a cartridge is fixedly connected to the inner side of the inner ring of the first bearing, a clamping block is clamped and connected to the inner side of the cartridge, a wire passing wheel body is fixedly connected between the two clamping blocks, and an anti-slip assembly is installed on one side of the mounting plate located below.
[0011] Preferably, the anti-slip assembly includes a limit rod slidably connected to the inner side of the mounting plate located below, a circular plate is fixedly connected to the outer side of the limit rod, a compression spring located on the outer side of the limit rod is fixedly connected to the bottom end of the circular plate, an outer ring of a second bearing is fixedly connected to the top end of the limit rod, a horizontally arranged rotating shaft is fixedly connected to the inner side of the inner ring of the second bearing, and a plurality of retaining rings are fixedly connected to the outer side of the rotating shaft.
[0012] Preferably, the vertical plate is detachably mounted on the front side of the mounting plate, the bottom end of the compression spring is fixedly connected to the top of the mounting plate located below, the outer side of the rotating shaft is tightly fitted with the outer side of the wire passing wheel body, and the retaining rings are symmetrically distributed on the outer side of the wire passing wheel body.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. In the present invention, by setting the adjusting sliding assembly, the sliding frame, the limiting column, the reset spring and the first sliding plate, when the wire speed suddenly increases, the first sliding plate slides inside the sliding frame, and the reset spring can absorb the pressure brought to the wire wheel body by the increase of the wire speed, thereby preventing the problem of the wire breaking caused by the sudden increase of the wire speed. When the wire speed returns to normal, the reset spring resets and drives the first sliding plate to reset, and the device can operate normally;
[0015] 2. In the present invention, by setting the first positioning hole, adjustment component, second slide plate, fixing plate, first adjustment bolt, connecting plate, second adjustment bolt and second positioning hole, when the speed difference of the wire thread is large, the second slide plate can be moved upward to compress the return spring, and the first adjustment bolt can be rotated to be inserted into the inner side of the second positioning hole. When the speed difference of the wire thread occurs, since the return spring has been partially compressed, the speed difference of the wire thread causes the displacement of the first slide plate to be small, thereby avoiding the shortening of the service life of the device due to the frequent sliding of the first slide plate. If the running speed of the wire thread is always relatively stable, the second adjustment bolt can be rotated to be inserted into the inner side of the first positioning hole, so that the first slide plate and the second slide plate no longer move, so that the device runs more smoothly. The setting of the adjustment component enables the device to be adjusted according to the speed of the wire thread, thereby increasing the scope of application of the device.
[0016] 3. In the present invention, by providing the iron positioning plate and positioning frame, when installing the reset spring, a suitable reset spring is placed outside the limit column of the sliding frame, the frame cover is closed to align the frame cover with the iron positioning plate on the rear side of the sliding frame, and then the positioning frame on the rear side of the top plate is rotated to make the positioning frame located outside the iron positioning plate until the magnetic plate is magnetically connected to the iron positioning plate, and the installation of the reset spring is completed. This arrangement allows the reset spring to be replaced as needed;
[0017] 4. In the present invention, by arranging the wire passing assembly, the wire passing wheel body, the anti-slip assembly, the limiting rod, the circular plate, the clamping spring, the second bearing, the rotating shaft and the retaining ring, when the wire speed suddenly slows down, the wire on the outside of the wire passing wheel body may be separated from the wire passing wheel body. At this time, the rotating shaft and the retaining ring limit the wire, and the anti-slip assembly can prevent the wire from being separated from the wire passing wheel body due to the sudden slowing down of the wire speed. When the wire speed returns to normal, the wire can be normally attached to the outside of the wire passing wheel body, and the device can operate normally. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall front structure of the present invention;
[0019] Figure 2 It is a schematic diagram of the overall rear side structure of the present invention;
[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at A;
[0021] Figure 4 It is a schematic diagram of the structure of the wire-passing assembly of the present invention;
[0022] Figure 5 It is a schematic diagram of the installation structure of the wire passing wheel body of the present invention;
[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;
[0024] Figure 7 It is a schematic diagram of the disassembled structure of the adjustment component of the present invention;
[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the sliding frame of the present invention;
[0026] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure at B;
[0027] Fig.10 It is a schematic diagram of the opening structure of the frame cover of the present invention;
[0028] Fig.11 For the present invention Fig.10 Schematic diagram of the structure at C.
[0029] In the figure: 1. support; 2. top plate; 3. driven wheel; 4. adjusting sliding assembly; 41. sliding frame; 42. limiting column; 43. reset spring; 44. first slide plate; 45. first positioning hole; 46. adjusting assembly; 461. second slide plate; 462. fixing plate; 463. first adjusting bolt; 464. connecting plate; 465. second adjusting bolt; 47. second positioning hole; 48. frame cover; 49. iron positioning plate; 5. positioning frame; 6. magnetic plate; 7. wire passing assembly; 71. support plate; 72. mounting plate; 73. vertical plate; 74. first bearing; 75. cartridge; 76. block; 77. wire passing wheel body; 78. anti-slip assembly; 781. limiting rod; 782. round plate; 783. clamping spring; 784. second bearing; 785. rotating shaft; 786. retaining ring. DETAILED DESCRIPTION
[0030] Embodiment 1:
[0031] See also Figure 1-11 , the present invention provides a technical solution:
[0032] A wire-passing wheel for preventing slipping off comprises a support 1, a top plate 2 arranged above the support 1 and a driven wheel 3 symmetrically installed at the bottom end of the top plate 2; an adjusting sliding assembly 4 is installed at the top end of the support 1; a symmetrically arranged positioning frame 5 is rotatably connected to the rear side of the top plate 2; a magnetic plate 6 is embedded and connected to the inner side of the positioning frame 5; a wire-passing assembly 7 is installed at the front side of the adjusting sliding assembly 4; when installing a reset spring 43, a suitable reset spring 43 is placed on the outside of a limiting column 42 in a slide frame 41; the frame cover 48 is closed to align the frame cover 48 with an iron positioning plate 49 on the rear side of the slide frame 41; then the positioning frame 5 on the rear side of the top plate 2 is rotated so that the positioning frame 5 is located on the outside of the iron positioning plate 49 until the magnetic plate 6 is magnetically connected to the iron positioning plate 49; the installation of the reset spring 43 is completed; this arrangement enables the reset spring 43 to be replaced as needed.
[0033] The adjusting sliding assembly 4 includes a sliding frame 41 fixedly connected to the top of the support 1, the sliding frame 41 is fixedly connected to the inside of the top plate 2 and passes through the top plate 2, a vertically arranged limiting column 42 is fixedly connected to the bottom end of the inner side of the sliding frame 41, a return spring 43 is arranged on the outer side of the limiting column 42, a first slide plate 44 is slidably connected to the outer surface of the limiting column 42, first positioning holes 45 are symmetrically opened on the left and right sides of the first slide plate 44, an adjusting assembly 46 is arranged below the first slide plate 44, and a plurality of second positioning holes 47 are symmetrically opened on the left and right sides of the sliding frame 41, a frame cover 48 is rotatably connected to the top of the sliding frame 41, and the frame cover 48 and the rear side of the sliding frame 41 are fixedly connected with symmetrically arranged iron positioning plates 49, when the silk thread speed suddenly accelerates, the first slide plate 44 slides on the inner side of the sliding frame 41, and the return spring 43 can absorb the pressure brought to the wire wheel body 77 by the accelerated silk thread speed, thereby preventing the problem of silk thread breaking due to the sudden acceleration of the silk thread speed, and when the silk thread speed returns to normal, the return spring 43 is reset to drive the first slide plate 44 to reset, and the device can operate normally.
[0034] The adjusting assembly 46 includes a second slide plate 461 slidably connected to the outer surface of the limiting column 42, the second slide plate 461 is fixedly connected with symmetrically arranged fixing plates 462 on the left and right sides, the fixing plate 462 is spirally connected with a first adjusting bolt 463 that penetrates the fixing plate 462, the fixing plate 462 is fixedly connected with a connecting plate 464 at the top, the connecting plate 464 is spirally connected with a second adjusting bolt 465 that penetrates the connecting plate 464, the first slide plate 44 and the second slide plate 461 are the same in shape and size, the first slide plate 44 and the second slide plate 461 are both slidably connected to the inner side of the slide frame 41, the first positioning hole 45 and the second positioning hole 47 have the same inner diameter, the first adjusting bolt 463 and the second adjusting bolt 465 have the same outer diameter, the inner diameter of the first positioning hole 45 is larger than the outer diameter of the first adjusting bolt 463, and the second adjusting bolt 465 is spirally connected with the first positioning hole 45. The positioning holes 45 are horizontally aligned, and the rear side of the iron positioning plate 49 is magnetically connected to the front side of the magnetic plate 6. When the speed difference of the silk thread is large, the second slide plate 461 can be moved upward to compress the reset spring 43, and the first adjusting bolt 463 is rotated to insert it into the inner side of the second positioning hole 47. When the silk thread speed has a difference, since the reset spring 43 has been compressed a part, the difference in the silk thread speed causes the displacement of the first slide plate 44 to be smaller, thereby avoiding the shortening of the service life of the device due to the frequent sliding of the first slide plate 44. If the silk thread running speed is always relatively stable, the second adjusting bolt 465 can be rotated to insert it into the inner side of the first positioning hole 45, so that the first slide plate 44 and the second slide plate 461 no longer move, so that the device runs more smoothly. The setting of the adjustment component 46 enables the device to be adjusted according to the speed of the silk thread, thereby increasing the scope of application of the device.
[0035] The wire-passing assembly 7 includes a support plate 71 fixedly connected to the front side of the first slide plate 44, a mounting plate 72 symmetrically arranged in the upper and lower parts is fixedly connected to the front side of the support plate 71, a vertical plate 73 is provided on the front side of the mounting plate 72, the outer ring of the first bearing 74 is fixedly connected to the front side of the support plate 71 and the rear side of the vertical plate 73, a cartridge 75 is fixedly connected to the inner side of the inner ring of the first bearing 74, a clamping block 76 is clamped and connected to the inner side of the cartridge 75, a wire-passing wheel body 77 is fixedly connected between the two clamping blocks 76, and an anti-slip assembly 78 is installed on one side of the mounting plate 72 located below, and the anti-slip assembly 78 includes a limiting rod 781 slidably connected to the inner side of the mounting plate 72 located below, a circular plate 782 is fixedly connected to the outer side of the limiting rod 781, a compression spring 783 located on the outer side of the limiting rod 781 is fixedly connected to the bottom end of the circular plate 782, and a second bearing 78 is fixedly connected to the top of the limiting rod 781 4, the inner side of the inner ring of the second bearing 784 is fixedly connected with a horizontally arranged rotating shaft 785, and the outer side of the rotating shaft 785 is fixedly connected with a plurality of retaining rings 786, the vertical plate 73 is detachably mounted on the front side of the mounting plate 72, the bottom end of the compression spring 783 is fixedly connected to the top of the mounting plate 72 located below, the outer side of the rotating shaft 785 is tightly fitted with the outer side of the wire passing wheel body 77, and the retaining rings 786 are symmetrically distributed on the outer side of the wire passing wheel body 77. When the speed of the silk thread suddenly slows down, the silk thread on the outer side of the wire passing wheel body 77 may be separated from the wire passing wheel body 77. At this time, the rotating shaft 785 and the retaining ring 786 limit the silk thread, and the setting of the anti-detachment component 78 can prevent the silk thread from being separated from the wire passing wheel body 77 due to the sudden slowing down of the silk thread speed. When the silk thread speed returns to normal, the silk thread can be normally attached to the outer side of the wire passing wheel body 77, and the device can operate normally.
[0036] Workflow: Before use, install the various components of the device. First, determine the model of the reset spring 43 according to the type of silk thread and the speed of silk thread transmission, place the appropriate reset spring 43 on the outside of the limit column 42 in the slide frame 41, close the frame cover 48 to align the frame cover 48 with the iron positioning plate 49 on the rear side of the slide frame 41, then rotate the positioning frame 5 on the rear side of the top plate 2 so that the positioning frame 5 is located on the outside of the iron positioning plate 49 until the magnetic plate 6 is magnetically connected to the iron positioning plate 49, and the installation of the reset spring 43 is completed. The setting of the iron positioning plate 49 and the positioning frame 5 makes the installation and replacement of the reset spring 43 more convenient. Next, install the wire wheel body 77 in the wire passing assembly 7, pull the limit rod 781, and make the limit rod 781 in the mounting plate 72 located below. The second bearing 784 and its connecting components rise until the outer side of the rotating shaft 785 is tightly fitted with the outer side of the wire wheel body 77 and the retaining ring 786 is located on the outer side of the wire wheel body 77. The installation of various components on the device can be completed. When the device needs to be used, the silk thread is passed between the top plate 2 and one of the driven wheels 3, and then the silk thread is passed through the wire wheel body 7 7 and the rotating shaft 785, and finally the silk thread passes through the top plate 2 and the other driven wheel 3, and the device can be used normally. When the silk thread speed suddenly increases, the first slide plate 44 drives the support plate 71 and its connecting components to slide on the inner side of the slide frame 41 at the top of the support 1, and the return spring 43 is compressed to absorb the pressure brought to the wire wheel body 77 by the increase of the silk thread speed. The setting of the adjusting sliding component 4 can prevent the problem of the silk thread breaking due to the sudden increase of the silk thread speed. When the silk thread speed returns to normal, the return spring 43 is reset to drive the first slide plate 44 to reset, and the device can operate normally. When the silk thread speed suddenly slows down, the silk thread on the outside of the wire wheel body 77 may be separated from the wire wheel body 77. At this time, the rotating shaft 785 and the retaining ring 786 are used to tighten the silk thread. The setting of the limit and anti-slip assembly 78 can prevent the silk thread from detaching from the wire wheel body 77 due to a sudden slowdown in the silk thread speed. When the silk thread speed returns to normal, the silk thread can be normally attached to the outside of the wire wheel body 77, and the device can operate normally. When the silk thread speed difference is large, the second slide plate 461 can be moved upward to compress the return spring 43, and the first adjusting bolt 463 in the fixing plate 462 is rotated until the first adjusting bolt 463 is inserted into the inside of the second positioning hole 47, so that the positioning of the second slide plate 461 can be completed. When the silk thread speed difference occurs, since the return spring 43 has been compressed a part, the difference in silk thread speed causes the displacement of the first slide plate 44 to be small, thereby avoiding the shortening of the service life of the device due to frequent sliding of the first slide plate 44.If the running speed of the wire is always relatively stable, the second adjusting bolt 465 inside the connecting plate 464 can be rotated until the second adjusting bolt 465 is inserted into the inside of the first positioning hole 45, and the first slide plate 44 and the second slide plate 461 are simultaneously fixed to the outside of the slide frame 41, so that the first slide plate 44 and the second slide plate 461 no longer move, making the device run more smoothly. The setting of the adjusting component 46 enables the device to be adjusted according to the speed of the wire, thereby increasing the application range of the device.
[0037] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.
Claims
1. An anti-slip wire wheel, comprising a support (1), a top plate (2) arranged above the support (1), and a driven wheel (3) symmetrically installed at the bottom end of the top plate (2), characterized in that: An adjusting sliding assembly (4) is installed at the top end of the support (1); a symmetrically arranged positioning frame (5) is rotatably connected to the rear side of the top plate (2); a magnetic plate (6) is embedded in the inner side of the positioning frame (5); and a wire passing assembly (7) is installed at the front side of the adjusting sliding assembly (4).
2. The anti-slip wire wheel according to claim 1, characterized in that: The adjusting sliding assembly (4) comprises a sliding frame (41) fixedly connected to the top end of the support (1), the sliding frame (41) being fixedly connected to the inside of the top plate (2) and penetrating the top plate (2), a vertically arranged limiting column (42) being fixedly connected to the bottom end of the inner side of the sliding frame (41), a return spring (43) being arranged on the outer side of the limiting column (42), a first sliding plate (44) being slidably connected to the outer surface of the limiting column (42), first positioning holes (45) being symmetrically provided on the left and right sides of the first sliding plate (44), an adjusting assembly (46) being arranged below the first sliding plate (44), a plurality of second positioning holes (47) being symmetrically provided on the left and right sides of the sliding frame (41), a frame cover (48) being rotatably connected to the top end of the sliding frame (41), and symmetrically arranged iron positioning plates (49) being fixedly connected to the rear sides of the frame cover (48) and the sliding frame (41).
3. The anti-slip wire wheel according to claim 2, characterized in that: The adjustment assembly (46) includes a second slide plate (461) slidably connected to the outer surface of the limiting column (42), the second slide plate (461) is fixedly connected to symmetrically arranged fixing plates (462) on the left and right sides, the fixing plate (462) is internally spirally connected to a first adjustment bolt (463) that passes through the fixing plate (462), the fixing plate (462) is fixedly connected to the top end with a connecting plate (464), and the connecting plate (464) is internally spirally connected to a second adjustment bolt (465) that passes through the connecting plate (464).
4. The anti-slip wire wheel according to claim 3, characterized in that: The first slide plate (44) and the second slide plate (461) are of the same shape and size. The first slide plate (44) and the second slide plate (461) are both slidably connected to the inner side of the slide frame (41). The inner diameters of the first positioning hole (45) and the second positioning hole (47) are the same. The outer diameters of the first adjusting bolt (463) and the second adjusting bolt (465) are the same. The inner diameter of the first positioning hole (45) is larger than the outer diameter of the first adjusting bolt (463). The second adjusting bolt (465) is horizontally aligned with the first positioning hole (45). The rear side of the iron positioning plate (49) is magnetically connected to the front side of the magnetic plate (6).
5. The anti-slip wire wheel according to claim 2, characterized in that: The wire passing assembly (7) comprises a support plate (71) fixedly connected to the front side of the first slide plate (44); the front side of the support plate (71) is fixedly connected to a mounting plate (72) symmetrically arranged up and down; the front side of the mounting plate (72) is provided with a vertical plate (73); the front side of the support plate (71) and the rear side of the vertical plate (73) are both fixedly connected to the outer ring of a first bearing (74); the inner side of the inner ring of the first bearing (74) is fixedly connected to a cartridge (75); the inner side of the cartridge (75) is snap-connected with a clamping block (76); a wire passing wheel body (77) is fixedly connected between the two clamping blocks (76); and an anti-slip assembly (78) is installed on one side of the mounting plate (72) located below.
6. The anti-slip wire wheel according to claim 5, characterized in that: The anti-slip assembly (78) includes a limit rod (781) slidably connected to the inner side of the mounting plate (72) located below, a circular plate (782) is fixedly connected to the outer side of the limit rod (781), a compression spring (783) located on the outer side of the limit rod (781) is fixedly connected to the bottom end of the circular plate (782), the outer ring of the second bearing (784) is fixedly connected to the top end of the limit rod (781), a horizontally arranged rotating shaft (785) is fixedly connected to the inner side of the inner ring of the second bearing (784), and a plurality of retaining rings (786) are fixedly connected to the outer side of the rotating shaft (785).
7. The anti-slip wire wheel according to claim 6, characterized in that: The vertical plate (73) is detachably mounted on the front side of the mounting plate (72); the bottom end of the compression spring (783) is fixedly connected to the top end of the mounting plate (72) located below; the outer side of the rotating shaft (785) is tightly fitted to the outer side of the wire passing wheel body (77); and the retaining ring (786) is symmetrically distributed on the outer side of the wire passing wheel body (77).