Power transmission device with adjustable support direction

Abstract

The present invention relates to the field of electric power technology, and provides an electric power transmission device with adjustable supporting direction, comprising a bearing mechanism, a horizontal adjustment component, a first angle adjustment component, and also comprising a second angle adjustment component, a sliding part and a third angle adjustment component, wherein the horizontal adjustment component is installed above the bearing mechanism, the first angle adjustment component is installed above the horizontal adjustment component, the second angle adjustment component is installed above the first angle adjustment component, the sliding part is installed in the second angle adjustment component, and the third angle adjustment component is installed on the side wall of the sliding part, and the third angle adjustment component comprises a supporting frame and a wire hoop, the wire hoop is connected to the surface of the supporting frame, and the supporting frame is movably connected to the side wall of the sliding part, so as to solve the problem of inconvenient adjustment of the supporting direction and the inconvenient adjustment of the cable position encountered in the process of cable installation, and has the characteristics of easy adjustment and easy use.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to electric power transmission equipment with adjustable supporting direction. Background Art

[0002] Electric energy transmission refers to a method of transmitting electric energy from one place to another by a power plant or power source. Due to the immaturity of early technology, electric energy transmission mostly used direct current transmission, and later gradually evolved into alternating current transmission. AC transmission has many advantages, reducing the loss in power transmission and increasing the speed and transmission length. However, there is still a certain loss. I believe that when the technology matures in the future, more suitable electric energy transmission methods will appear.

[0003] Transmission lines can be divided into overhead transmission lines and underground transmission lines according to their structural forms. The former consists of line towers, conductors, insulators, etc., and is erected on the ground; the latter mainly uses cables and is laid underground or underwater. Transmission can be divided into direct current transmission and alternating current transmission according to the nature of the transmitted current. Direct current transmission was first successfully realized in the 1880s, but was later replaced by alternating current transmission at the end of the 19th century due to the limitation of low voltage. The success of alternating current transmission ushered in the era of electrification in the 20th century. Since the 1960s, due to the development of power electronics technology, direct current transmission has made new developments, and cooperated with alternating current transmission to form an AC / DC hybrid power system.

[0004] However, existing power transmission equipment for supporting cables has the following defects: (1) when a supported cable is repaired or installed and it is necessary to support another cable or multiple cables that are not parallel to the cable, it is impossible to quickly adjust the position of the supporting equipment according to the position of the other cable; (2) it is impossible to quickly move the supported cable over other cables or obstacles to another position or installation point, and it is impossible to quickly adjust the support angle of the supporting equipment according to the cables between two installation points at different heights. Summary of the invention

[0005] The object of the present invention is to provide a power transmission device with adjustable support direction, aiming to solve the problem that it is inconvenient to adjust the support direction and the cable position when using an existing power transmission device with adjustable support direction.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an electric power transmission device with adjustable supporting direction, comprising a bearing mechanism, a horizontal adjustment component, a first angle adjustment component, and also comprising a second angle adjustment component, a sliding part and a third angle adjustment component, wherein the horizontal adjustment component is installed above the bearing mechanism, the first angle adjustment component is installed above the horizontal adjustment component, the second angle adjustment component is installed above the first angle adjustment component, the sliding part is installed in the second angle adjustment component, the third angle adjustment component is installed on the side wall of the sliding part, the third angle adjustment component comprises a support frame and a wire hoop, the wire hoop is connected to the surface of the support frame, and the support frame is movably connected to the side wall of the sliding part.

[0007] As a further solution of the present invention, the second angle adjustment component includes a second rotating shell, a third driving part, a second center shaft, a second transmission gear, a slide groove and a toothed guide rail. The third driving part is fixedly connected above the first angle adjustment component. The bottom of the second rotating shell is rotatably connected to the top of the first angle adjustment component through the second center shaft. A second transmission gear is installed on the surface of the second center shaft. The third driving part is transmission-connected to the second transmission gear. A slide groove and a toothed guide rail are arranged in the second rotating shell. The slide groove and the toothed guide rail are communicated. The sliding part is located in the slide groove and is transmission-connected to the toothed guide rail.

[0008] As a further solution of the present invention, the sliding part includes a fourth driving part and a sliding shell, the fourth driving part includes a fourth driving motor and a fourth driving gear, the fourth driving motor is fixedly connected in the sliding shell, the fourth driving motor is transmission connected to the toothed guide rail through the fourth driving gear, the sliding shell is slidably connected in the slide groove, and the support frame is movably connected to the side wall of the sliding shell.

[0009] As a further solution of the present invention, the third angle adjustment assembly includes a fifth driving part, a third center axis and a third transmission gear. The fifth driving part is fixedly connected to the side wall of the sliding shell, the support frame is rotatably connected to the side wall of the sliding shell through the third center axis, the third transmission gear is installed on the surface of the third center axis, and the fifth driving part is transmission-connected to the third transmission gear.

[0010] As a further solution of the present invention, the bearing mechanism includes a fixed frame, a moving wheel assembly and a fixed guide rail, the fixed guide rail is installed above the fixed frame, the moving wheel assembly is installed at the bottom of the fixed frame, and the horizontal adjustment assembly is installed in the fixed guide rail.

[0011] As a further solution of the present invention, the horizontal adjustment assembly includes a first driving part, a threaded rod, a nut seat and a sleeve, the first driving part is a first driving motor, the first driving motor is connected to the threaded rod, the sleeve is installed on the surface of the nut seat, and the nut seat is threadedly connected to the surface of the threaded rod.

[0012] As a further solution of the present invention, the first angle adjustment assembly includes a first rotating shell, a first center axis, a second driving part and a first transmission gear. The first rotating shell is rotatably connected in the sleeve through the first center axis, the second driving part is fixedly connected to the surface of the nut seat, the first transmission gear is installed on the surface of the first center axis, the second driving part is transmission-connected to the first transmission gear, the third driving part is fixedly connected to the surface of the first rotating shell, and the second center axis is rotatably connected to the first rotating shell.

[0013] As a further solution of the present invention, the second driving unit includes a second driving motor and a second driving gear, and the second driving motor is connected to the first transmission gear through the second driving gear. The third driving unit includes a third driving motor and a third driving gear, and the third driving motor is connected to the second transmission gear through the third driving gear.

[0014] As a further solution of the present invention, it also includes a control device, which is installed on the surface of the fixed frame, and the first drive unit, the second drive unit, the third drive unit, the fourth drive unit and the fifth drive unit are electrically connected to the control device.

[0015] As a further solution of the present invention, the second rotating shell, the support frame and the wire hoop are all made of insulating materials, and the wire hoop is threadedly connected to the surface of the support frame.

[0016] To sum up, the beneficial effects of the present invention are as follows: the design of the horizontal adjustment component, the first angle adjustment component, the second angle adjustment component, the sliding part and the third angle adjustment component in the present invention cooperate with each other, which can adjust the position and angle of the support frame according to different situations, solves the problems of inconvenient adjustment of the support direction and the inconvenience of adjusting the cable position encountered during the cable installation process, and has the characteristics of easy adjustment and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a power transmission device with adjustable supporting direction according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the connection between the bearing mechanism and the horizontal adjustment assembly in an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the first angle adjustment component in an embodiment of the present invention.

[0020] Figure 4 It is a stereoscopic diagram of the second angle adjustment component in the embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the structure of the sliding part in the embodiment of the present invention.

[0022] Figure 6 It is an assembly diagram of the second angle adjustment component and the sliding part in an embodiment of the present invention.

[0023] Figure 7 Schematic diagram of the structure of the third angle adjustment component in an embodiment of the present invention.

[0024] Figure 8 Schematic diagram of the connection between the sliding part and the third angle adjustment component in an embodiment of the present invention.

[0025] Figure markings: 1-bearing mechanism, 11-fixed frame, 12-moving wheel assembly, 13-fixed guide rail, 2-horizontal adjustment assembly, 21-first driving part, 22-threaded rod, 23-nut seat, 24-sleeve, 3-first angle adjustment assembly, 31-first rotating shell, 32-first center axis, 33-second driving part, 34-first transmission gear, 4-second angle adjustment assembly, 41-second rotating shell, 42-third driving part, 43-second center axis, 44-second transmission gear, 45-slide groove, 46-toothed guide rail, 5-sliding part, 51-fourth driving part, 52-sliding shell, 6-third angle adjustment assembly, 61-support frame, 62-wire hoop, 63-fifth driving part, 64-third center axis, 65-third transmission gear, 7-control device. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the description of the present invention, the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] See also Figures 1 to 8An embodiment of the present invention provides an adjustable supporting direction power transmission device, comprising a bearing mechanism 1, a horizontal adjustment component 2, a first angle adjustment component 3, and also comprising a second angle adjustment component 4, a sliding portion 5 and a third angle adjustment component 6, wherein the horizontal adjustment component 2 is installed above the bearing mechanism 1, the first angle adjustment component 3 is installed above the horizontal adjustment component 2, the second angle adjustment component 4 is installed above the first angle adjustment component 3, the sliding portion 5 is installed in the second angle adjustment component 4, the third angle adjustment component 6 is installed on the side wall of the sliding portion 5, the third angle adjustment component 6 comprises a support frame 61 and a wire hoop 62, the wire hoop 62 is connected to the surface of the support frame 61, and the support frame 61 is movably connected to the side wall of the sliding portion 5.

[0030] In the embodiment of the present invention, the design of the horizontal adjustment component 2, the first angle adjustment component 3, the second angle adjustment component 4, the sliding part 5 and the third angle adjustment component 6 in the present invention cooperate with each other, which can adjust the position and angle of the support frame 61 according to different situations, solves the problems of inconvenient adjustment of the support direction and the inconvenience of adjusting the cable position encountered during the cable installation process, and has the characteristics of easy adjustment and easy use.

[0031] See also Figures 1 to 7 In one embodiment of the present invention, the second angle adjustment component 4 includes a second rotating shell 41, a third driving part 42, a second central shaft 43, a second transmission gear 44, a slide groove 45 and a toothed guide rail 46. The third driving part 42 is fixedly connected above the first angle adjustment component 3. The second rotating shell 41 is rotatably connected to the first angle adjustment component 3 above through the second central shaft 43. The second transmission gear 44 is installed on the surface of the second central shaft 43. The third driving part 42 is transmission-connected to the second transmission gear 44. The second rotating shell 41 is provided with a slide groove 45 and a toothed guide rail 46. The slide groove 45 and the toothed guide rail 46 are communicated. The sliding part 5 is located in the slide groove 45 and is transmission-connected to the toothed guide rail 46.

[0032] Furthermore, the second rotating shell 41 , the support frame 61 and the wire hoop 62 are all made of insulating materials, and the wire hoop 62 is threadedly connected to the surface of the support frame 61 .

[0033] In an embodiment of the present invention, when it is necessary to quickly move the supported cable over other cables or obstacles to another position or installation point, the third drive unit 42 and the fourth drive unit 51 are started by the control device 7, and the third drive unit 42 drives the second rotating shell 41, the sliding part 5 and the third angle adjustment assembly 6 to rotate around the second center axis 43 through the second transmission gear 44, so that the cable located above the support frame 61 can cross the obstacle with the second center axis 43 as the center.

[0034] See also Figures 1 to 8 In one embodiment of the present invention, the sliding portion 5 includes a fourth driving portion 51 and a sliding shell 52, the fourth driving portion 51 includes a fourth driving motor and a fourth driving gear, the fourth driving motor is fixedly connected in the sliding shell 52, the fourth driving motor is transmission-connected to the toothed guide rail 46 through the fourth driving gear, the sliding shell 52 is slidably connected in the slide groove 45, and the support frame 61 is movably connected to the side wall of the sliding shell 52.

[0035] In an embodiment of the present invention, when the cable located above the support frame 61 climbs over an obstacle with the second central axis 43 as the center, the fourth driving gear in the fourth driving unit 51 achieves the purpose of driving the third angle adjustment component 6 to move linearly along the second rotating shell 41 by engaging with the toothed guide rail 46, thereby realizing the function of adjusting the distance between the cable and the obstacle and adjusting the height of the support frame 61 according to the height of the installation point.

[0036] See also Figures 1 to 8 In one embodiment of the present invention, the third angle adjustment assembly 6 includes a fifth driving portion 63, a third center shaft 64 and a third transmission gear 65. The fifth driving portion 63 is fixedly connected to the side wall of the sliding shell 52, and the support frame 61 is rotatably connected to the side wall of the sliding shell 52 through the third center shaft 64. The third transmission gear 65 is installed on the surface of the third center shaft 64, and the fifth driving portion 63 is transmission-connected to the third transmission gear 65.

[0037] In the embodiment of the present invention, when it is necessary to install cables between two installation points at different heights, the fifth driving unit 63 is started by the control device 7, and the fifth driving unit 63 drives the support frame 61 to rotate around the third central axis 64 through the third transmission gear 65, so that the central axis of the cable hoop 62 is parallel to the cable.

[0038] See also Figures 1 to 4 In one embodiment of the present invention, the supporting mechanism 1 includes a fixed frame 11, a moving wheel assembly 12 and a fixed guide rail 13, the fixed guide rail 13 is installed above the fixed frame 11, the moving wheel assembly 12 is installed at the bottom of the fixed frame 11, and the horizontal adjustment assembly 2 is installed in the fixed guide rail 13.

[0039] See also Figures 1 to 4 In one embodiment of the present invention, the horizontal adjustment assembly 2 includes a first driving part 21, a threaded rod 22, a nut seat 23 and a sleeve 24. The first driving part 21 is a first driving motor, which is connected to the threaded rod 22. The sleeve 24 is installed on the surface of the nut seat 23, and the nut seat 23 is threadedly connected to the surface of the threaded rod 22.

[0040] In the embodiment of the present invention, when it is necessary to adjust the horizontal distance between the support frame 61 and the cable, the first driving part 21 is started by the control device 7, and the first driving part 21 drives the threaded rod 22 to rotate, and the rotating threaded rod 22 drives the nut seat 23 to make a linear motion in the fixed guide rail 13, thereby adjusting the horizontal positions of the first angle adjustment component 3, the second angle adjustment component 4, the sliding part 5 and the third angle adjustment component 6. When there is an obstacle directly below the cable, there is no need to move the power transmission equipment directly below the cable, and the support frame 61 can be adjusted to directly below the cable.

[0041] See also Figures 1 to 4 In one embodiment of the present invention, the first angle adjustment assembly 3 includes a first rotating shell 31, a first central axis 32, a second driving portion 33 and a first transmission gear 34. The first rotating shell 31 is rotatably connected to the sleeve 24 through the first central axis 32. The second driving portion 33 is fixedly connected to the surface of the nut seat 23. The first transmission gear 34 is installed on the surface of the first central axis 32. The second driving portion 33 is transmission-connected to the first transmission gear 34. The third driving portion 42 is fixedly connected to the surface of the first rotating shell 31. The second central axis 43 is rotatably connected to the first rotating shell 31.

[0042] In an embodiment of the present invention, after the cable supported on the support frame 61 is inspected or installed, when it is necessary to support another cable or multiple cables that are not parallel to the cable, the second drive unit 33 is started by the control device 7, and the second drive unit 33 drives the first rotating shell 31 to rotate around the first center axis 32 through the first transmission gear 34, thereby driving the second angle adjustment component 4, the sliding part 5 and the third angle adjustment component 6 to rotate around the first center axis 32, thereby quickly adjusting the support frame 61 to the position of another cable. If the position of the other cable support needs to be adjusted, the horizontal position of the support frame 61 can continue to be adjusted through the horizontal adjustment component 2.

[0043] See also Figures 1 to 8 In one embodiment of the present invention, the second driving unit 33 includes a second driving motor and a second driving gear, and the second driving motor is connected to the first transmission gear 34 through the second driving gear. The third driving unit 42 includes a third driving motor and a third driving gear, and the third driving motor is connected to the second transmission gear 44 through the third driving gear.

[0044] See also Figures 1 to 7 In one embodiment of the present invention, it also includes a control device 7, which is installed on the surface of the fixed frame 11, and the first driving part 21, the second driving part 33, the third driving part 42, the fourth driving part 51 and the fifth driving part 63 are electrically connected to the control device 7.

[0045] The working process of the embodiment of the present invention is as follows: when it is necessary to adjust the horizontal distance between the support frame 61 and the cable, the first driving part 21 is started by the control device 7, the first driving part 21 drives the threaded rod 22 to rotate, and the rotating threaded rod 22 drives the nut seat 23 to make a linear motion in the fixed guide rail 13, thereby adjusting the horizontal positions of the first angle adjustment component 3, the second angle adjustment component 4, the sliding part 5 and the third angle adjustment component 6. When there is an obstacle directly below the cable, it is not necessary to move the power transmission device directly below the cable, and the support frame 61 can be adjusted to be directly below the cable;

[0046] When the cable supported on the support frame 61 is repaired or installed, if it is necessary to support another cable or multiple cables that are not parallel to the cable, the second driving part 33 is started by the control device 7, and the second driving part 33 drives the first rotating shell 31 to rotate around the first central axis 32 through the first transmission gear 34, thereby driving the second angle adjustment component 4, the sliding part 5 and the third angle adjustment component 6 to rotate around the first central axis 32, so that the support frame 61 is quickly adjusted to the position of another cable. If the position of another cable support needs to be adjusted, the horizontal position of the support frame 61 can be further adjusted through the horizontal adjustment component 2;

[0047] When it is necessary to quickly move the supported cable over other cables or obstacles to another position or installation point, the third driving part 42 and the fourth driving part 51 are started by the control device 7, and the third driving part 42 drives the second rotating shell 41, the sliding part 5 and the third angle adjustment component 6 to rotate around the second central axis 43 through the second transmission gear 44, so that the cable located above the support frame 61 can climb over the obstacle with the second central axis 43 as the center. In this process, the fourth driving gear in the fourth driving part 51 achieves the purpose of driving the third angle adjustment component 6 to make a linear motion along the second rotating shell 41 by meshing with the toothed guide rail 46, thereby realizing the function of adjusting the distance between the cable and the obstacle and adjusting the height of the support frame 61 according to the height of the installation point; when it is necessary to install the cable between two installation points at different heights, the fifth driving part 63 is started by the control device 7, and the fifth driving part 63 drives the support frame 61 to rotate around the third central axis 64 through the third transmission gear 65, so that the central axis of the cable hoop 62 is parallel to the cable.

[0048] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A power transmission device with adjustable support direction, comprising a bearing mechanism (1), a horizontal adjustment component (2), and a first angle adjustment component (3), characterized in that: It also comprises a second angle adjustment component (4), a sliding part (5) and a third angle adjustment component (6), wherein the horizontal adjustment component (2) is installed above the bearing mechanism (1), the first angle adjustment component (3) is installed above the horizontal adjustment component (2), the second angle adjustment component (4) is installed above the first angle adjustment component (3), the sliding part (5) is installed in the second angle adjustment component (4), the third angle adjustment component (6) is installed on the side wall of the sliding part (5), the third angle adjustment component (6) comprises a support frame (61) and a wire hoop (62), the wire hoop (62) is connected to the surface of the support frame (61), and the support frame (61) is movably connected to the side wall of the sliding part (5); The second angle adjustment component (4) comprises a second rotating shell (41), a third driving part (42), a second central shaft (43), a second transmission gear (44), a slide groove (45) and a toothed guide rail (46); the third driving part (42) is fixedly connected to the top of the first angle adjustment component (3); the bottom of the second rotating shell (41) is rotatably connected to the top of the first angle adjustment component (3) through the second central shaft (43); a second transmission gear (44) is mounted on the surface of the second central shaft (43); the third driving part (42) is transmission-connected to the second transmission gear (44); a slide groove (45) and a toothed guide rail (46) are arranged in the second rotating shell (41); the slide groove (45) and the toothed guide rail (46) are in communication; the sliding part (5) is located in the slide groove (45) and is transmission-connected to the toothed guide rail (46); The sliding part (5) comprises a fourth driving part (51) and a sliding housing (52); the fourth driving part (51) comprises a fourth driving motor and a fourth driving gear; the fourth driving motor is fixedly connected in the sliding housing (52); the fourth driving motor is transmission-connected to the toothed guide rail (46) via the fourth driving gear; the sliding housing (52) is slidably connected in the slide groove (45); and the support frame (61) is movably connected to the side wall of the sliding housing (52).

2. The power transmission device with adjustable support direction according to claim 1, characterized in that: The third angle adjustment assembly (6) comprises a fifth driving part (63), a third central shaft (64) and a third transmission gear (65); the fifth driving part (63) is fixedly connected to the side wall of the sliding housing (52); the support frame (61) is rotatably connected to the side wall of the sliding housing (52) via the third central shaft (64); the third transmission gear (65) is mounted on the surface of the third central shaft (64); and the fifth driving part (63) is transmission-connected to the third transmission gear (65).

3. The power transmission device with adjustable support direction according to claim 2, characterized in that: The bearing mechanism (1) comprises a fixed frame (11), a moving wheel assembly (12) and a fixed guide rail (13); the fixed guide rail (13) is installed above the fixed frame (11); the moving wheel assembly (12) is installed at the bottom of the fixed frame (11); and the horizontal adjustment assembly (2) is installed inside the fixed guide rail (13).

4. The power transmission device with adjustable support direction according to claim 3, characterized in that: The horizontal adjustment assembly (2) comprises a first driving part (21), a threaded rod (22), a nut seat (23) and a sleeve (24), wherein the first driving part (21) is a first driving motor, the first driving motor is connected to the threaded rod (22), the sleeve (24) is installed on the surface of the nut seat (23), and the nut seat (23) is threadedly connected to the surface of the threaded rod (22).

5. The power transmission device with adjustable support direction according to claim 4, characterized in that: The first angle adjustment assembly (3) comprises a first rotating shell (31), a first central axis (32), a second driving part (33) and a first transmission gear (34); the first rotating shell (31) is rotationally connected to the sleeve (24) via the first central axis (32); the second driving part (33) is fixedly connected to the surface of the nut seat (23); the first transmission gear (34) is mounted on the surface of the first central axis (32); the second driving part (33) is transmission-connected to the first transmission gear (34); the third driving part (42) is fixedly connected to the surface of the first rotating shell (31); and the second central axis (43) is rotationally connected to the first rotating shell (31).

6. The power transmission device with adjustable support direction according to claim 5, characterized in that: The second driving unit (33) comprises a second driving motor and a second driving gear, the second driving motor is drivingly connected to the first transmission gear (34) via the second driving gear, and the third driving unit (42) comprises a third driving motor and a third driving gear, the third driving motor is drivingly connected to the second transmission gear (44) via the third driving gear.

7. The power transmission device with adjustable support direction according to claim 6, characterized in that: The invention also comprises a control device (7), wherein the control device (7) is mounted on the surface of the fixed frame (11), and the first drive unit (21), the second drive unit (33), the third drive unit (42), the fourth drive unit (51) and the fifth drive unit (63) are electrically connected to the control device (7).

8. The power transmission device with adjustable support direction according to claim 1, characterized in that: The second rotating shell (41), the support frame (61) and the wire hoop (62) are all made of insulating materials, and the wire hoop (62) is threadedly connected to the surface of the support frame (61).

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