Pantograph head device

Abstract

The invention relates to the technical field of pantographs, and particularly discloses a pantograph head device, which adopts a combined structure design of a first hinge structure and a plate spring, effectively absorbs vibration impact during contact through the characteristics of the plate spring, reduces the mechanical wear of a carbon slide plate, prolongs the service life of the carbon slide plate, and improves the safety of pantographs. The plate spring has a large adaptation interval for the height change of the contact net and is also beneficial to balance pressure distribution in the horizontal direction, so that a multi-stage flexible conductive system is further formed, continuous and stable current collection is ensured, meanwhile, the plate spring adapts to up-down fluctuation of the contact net, possibly generated electric arcs and vibration are borne, constant contact pressure is ensured, and the contact net is prevented from being damaged. The flexibility and the vibration impact resistance are effectively improved, and stable and reliable operation of a rail transit system is guaranteed. Meanwhile, installation and later maintenance are easy and convenient, large-scale disassembly of the pantograph body is not needed, and plate spring tension adjustment and carbon slide plate replacement are convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pantograph, and particularly relates to a pantograph head device. BACKGROUND

[0002] The pantograph is a core device for electric power traction vehicles (including subways, trams, etc.) to obtain power from overhead contact lines, and plays a crucial role in railway electrified transportation systems. Among them, the pantograph head is a key component of the device, which is directly related to the current collection performance of the electric power traction vehicle. Electric power traction vehicles generally adopt pantograph current collection mode, that is, through the pantograph head and the contact net wire to realize efficient conduction of electric energy from the power grid to the vehicle.

[0003] The flexibility of the pantograph head is a key core feature in the design of the pantograph, and its performance is directly related to the stability, continuity and overall current collection quality of electric power transmission. In order to ensure ideal current collection effect, the pantograph head must have multi-degree-of-freedom motion capability, so as to adapt to the height change and angle offset of the contact net that may occur in the actual operation process, and can effectively buffer and absorb various mechanical shocks and vibrations. However, the traditional pantograph head has certain degree of deficiency in flexibility and durability, and is difficult to meet the demand of modern rail transit for high reliability current collection system.

[0004] Therefore, there is an urgent need for a pantograph head device to solve the above problems. SUMMARY

[0005] The present application relates to the technical field of pantograph, and particularly relates to a pantograph head device.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] The present application provides a pantograph head device, comprising:

[0008] a support assembly;

[0009] A plurality of carbon plate assemblies are fixedly arranged on the support assembly, each of the carbon plate assemblies comprises two carbon plate seats and two carbon sliding plates, the two carbon plate seats are oppositely and spacedly arranged on the support assembly along a first direction, the two carbon sliding plates are arranged on the two carbon plate seats respectively, and the two carbon sliding plates are oppositely and spacedly arranged along a second direction, the first direction and the second direction are perpendicular to each other, and a carbon plate assembly is arranged between each of the carbon sliding plate and the carbon plate seat, the carbon plate assembly comprises a leaf spring, an upper supporting plate, a lower supporting plate and a first pin shaft, the upper supporting plate is fixedly installed between the top of the carbon sliding plate and the bottom of the leaf spring, the bottom of the leaf spring is fixedly installed between the lower supporting plate and the carbon plate seat, and the upper supporting plate and the lower supporting plate are connected through the first pin shaft to form a first hinged structure.

[0010] A plurality of joint assemblies are arranged in one-to-one correspondence with the carbon plate assemblies, and the joint assemblies are conductively connected between the carbon sliding plates and high-voltage cables.

[0011] As a preferred technical solution of the pantograph head device, the support assembly comprises a beam arm, a hinged seat, a base plate, a second pin shaft and a plurality of elastic members, the hinged seat is fixedly arranged on the base plate, the beam arm is fixedly arranged on the carbon plate seat, the beam arm and the hinged seat are connected through the second pin shaft to form a second hinged structure, and the plurality of elastic members are arranged between the beam arm and the base plate.

[0012] As a preferred technical solution of the pantograph head device, the number of elastic members is two, and the two elastic members are symmetrically arranged relative to the axis of the second pin shaft.

[0013] As a preferred technical solution of the pantograph head device, the elastic member is a compression spring.

[0014] As a preferred technical solution of the pantograph head device, the carbon plate assembly further comprises a first limiting ring and a second limiting ring, the first limiting ring and the second limiting ring are fixedly sleeved on the beam arm, and the joint assembly is arranged between the first limiting ring and the second limiting ring.

[0015] As a preferred technical solution of the pantograph head device, a first half-key groove is formed on the end face of the beam arm, a second half-key groove is formed on the carbon plate seat, the first half-key groove and the second half-key groove are in butt joint to form a key groove cavity, and the key groove cavity is used for pressing a connecting key.

[0016] As a preferred technical scheme of the pantograph head device, the carbon plate assembly further comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are oppositely and spacedly arranged along the second direction, and the first connecting rod and the second connecting rod are fixedly connected between the two carbon plate seats.

[0017] As a preferred technical scheme of the pantograph head device, the plate spring has a ring structure, a top of the plate spring has a first ring-shaped peripheral surface part, a bottom of the plate spring has a second ring-shaped peripheral surface part, the second ring-shaped peripheral surface part is provided with a notch to form two connecting segments, the carbon plate assembly further comprises two fasteners, the two fasteners are correspondingly arranged at the two connecting segments, and the fasteners are sequentially arranged at the carbon plate seats, the connecting segments and the lower supporting plates.

[0018] As a preferred technical scheme of the pantograph head device, the carbon plate assembly further comprises a stud and a nut, the stud is protruded from the bottom of the carbon slide plate, the stud is sequentially arranged at the upper supporting plate, the first ring-shaped peripheral surface part and fixedly connected with the nut.

[0019] As a preferred technical scheme of the pantograph head device, the joint assembly is arranged between the two carbon slide plates, and the joint assembly comprises a plurality of first braided copper belts, a plurality of second braided copper belts, a copper bar and a joint base, the copper bar is fixedly arranged on the joint base, the joint base is fixedly arranged on the support assembly, one end of the plurality of first braided copper belts is electrically connected with the copper bar, the other end of the plurality of first braided copper belts is connected with one of the carbon slide plates, one end of the plurality of second braided copper belts is electrically connected with the copper bar, the other end of the plurality of second braided copper belts is connected with the other carbon slide plate, and one end of the high-voltage cable is electrically connected with the copper bar.

[0020] The pantograph head device has the following beneficial effects:

[0021] The present application provides a pantograph head device, which comprises a support assembly, a plurality of carbon plate assemblies and a plurality of joint assemblies, the plurality of carbon plate assemblies are fixedly arranged on the support assembly, each carbon plate assembly comprises two carbon plate seats and two carbon slides, the two carbon plate seats are oppositely and spacedly arranged on the support assembly along a first direction, the two carbon slides are arranged on the two carbon plate seats respectively, and the two carbon slides are oppositely and spacedly arranged along a second direction, the first direction and the second direction are perpendicular to each other, a carbon plate assembly is arranged between each carbon slide and carbon plate seat, the carbon plate assembly comprises a leaf spring, an upper supporting plate, a lower supporting plate and a first pin shaft, the upper supporting plate is fixedly installed between the top of the carbon slide and the bottom of the leaf spring, the bottom of the leaf spring is fixedly installed between the lower supporting plate and the carbon plate seat, the upper supporting plate and the lower supporting plate are connected through the first pin shaft to form a first hinged structure, the plurality of joint assemblies are arranged in one-to-one correspondence with the plurality of carbon plate assemblies, and the joint assemblies are conductively connected between the carbon slides and high-voltage cables. By adopting the combined structure design of the first hinged structure and the leaf spring, the vibration impact during contact is effectively absorbed through the characteristics of the leaf spring, the mechanical wear of the carbon slide is reduced, the service life is prolonged, the leaf spring has a large adaptive interval for the height change of the contact net, and it is also helpful to balance the pressure distribution in the horizontal direction, so as to form a multi-stage and flexible conductive system, which can adapt to the up-down fluctuation of the contact net and withstand the possible arc and vibration, ensure the constant contact pressure, effectively improve the flexibility and anti-vibration impact performance, and ensure the stable and reliable operation of the rail transit system. At the same time, the installation and later maintenance are simple, the main body of the pantograph does not need to be disassembled on a large scale, and the leaf spring tension and the carbon slide can be adjusted and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structure schematic view of the pantograph head device provided by the present application is provided.

[0023] Figure 2 A structure schematic view of the support assembly provided by the present application is provided.

[0024] Figure 3 A structure schematic view of the joint assembly provided by the present application is provided.

[0025] Figure 4 A structure schematic view of the carbon plate assembly provided by the present application is provided.

[0026] Figure 5 An explosion view of the carbon plate assembly provided by the present application is provided.

[0027] Among them:

[0028] 100, support assembly; 200, carbon plate assembly; 300, joint assembly.

[0029] 1. carbon plate base; 2. carbon slide plate; 3. leaf spring; 4. upper supporting plate; 5. lower supporting plate; 6. first pin shaft; 7. beam arm; 8. hinged base; 9. base plate; 10. second pin shaft; 11. elastic member; 12. first limiting ring; 13. second limiting ring; 14. first connecting rod; 15. second connecting rod; 16. fastener; 17. stud; 18. nut; 19. first braided copper strip; 20. second braided copper strip; 21. copper bar; 22. joint base; 23. high-voltage cable. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals used in different figures refer to the same or like components. The embodiments described below are illustrative only, and are not intended to be limiting on the present application.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0032] Unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Unless otherwise clearly specified and limited, "on" or "under" of the first feature to the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 5 As shown, this embodiment provides a pantograph head device, which includes: a support assembly 100, a plurality of carbon plate assemblies 200, and a plurality of connector assemblies 300. The plurality of carbon plate assemblies 200 are all fixedly mounted on the support assembly 100. Each carbon plate assembly 200 includes two carbon plate seats 1 and two carbon plate slides 2. The two carbon plate seats 1 are disposed opposite to each other and spaced apart on the support assembly 100 along a first direction. The two carbon plate slides 2 are respectively disposed on the two carbon plate seats 1, and the two carbon plate slides 2 are arranged opposite to each other and spaced apart along a second direction. The first direction and the second direction are perpendicular to each other. A carbon plate assembly is disposed between the carbon plate slides 2 and the carbon plate seats 1. The carbon plate assembly includes a leaf spring 3 and an upper support. Plate 4, lower support plate 5 and first pin 6, carbon slide plate 2 is mounted on carbon plate seat 1 via leaf spring 3, upper support plate 4 is fixedly installed between the top of carbon slide plate 2 and leaf spring 3, and bottom of leaf spring 3 is fixedly installed between lower support plate 5 and carbon plate seat 1 to protect the components from being scratched by leaf spring 3. Upper support plate 4 and lower support are saddle-shaped, and there is a waist-shaped hole at the junction of upper support plate 4 and lower support for the first pin 6 to pass through to form a first hinge structure. Cotter pin is used at the opening of the first pin 6 to fix the first pin 6. Several connector assemblies 300 are arranged one-to-one with several carbon plate assemblies 200, and the connector assemblies 300 are electrically connected between carbon slide plate 2 and high voltage cable 23. This design, employing a combination of a first hinge structure and leaf spring 3, effectively absorbs vibration and impact during contact through the characteristics of leaf spring 3, reducing mechanical wear on carbon sliding plate 2 and extending its service life. Leaf spring 3 has a large adaptability range to changes in contact wire height and also helps to balance pressure distribution in the horizontal direction, further forming a multi-stage, flexible conductive system. While ensuring continuous and stable current collection, it adapts to the vertical fluctuations of the contact wire and withstands potential arcing and vibration, ensuring constant contact pressure and effectively improving flexibility and vibration resistance, thus guaranteeing the stable and reliable operation of the rail transit system. Simultaneously, installation and subsequent maintenance are simple, requiring no large-scale disassembly of the pantograph body, and facilitating adjustment of leaf spring 3 tension and replacement of carbon sliding plate 2. It should be noted that the first direction and the second direction are respectively... Figure 1 The arrow in the image indicates the direction.

[0036] Specifically, the embodiment exemplarily provides the technical scheme as follows: the support assembly 100 comprises a beam arm 7, a hinge seat 8, a base plate 9, a second pin shaft 10 and a plurality of elastic members 11. The hinge seat 8 is fixedly arranged on the base plate 9. The beam arm 7 is fixedly arranged in the carbon plate seat 1. The beam arm 7 and the hinge seat 8 are connected by the second pin shaft 10 to form a second hinge structure. The plurality of elastic members 11 are arranged between the beam arm 7 and the base plate 9. The base plate 9 is installed on the pantograph main body, so that the pantograph head has the ability of large-angle floating. In this way, the combination structure of the second hinge structure and the elastic member 11 is adopted, wherein the hinge provides the rotation freedom, and the elastic member 11 provides the reset buffer or the nonlinear buffer force, and the two work together to realize the floating of “large angle” and “controllable and resettable”, so as to make the pantograph head adapt to complex traffic conditions and further improve the flexibility and durability of the whole device.

[0037] It should be noted that the beam arm 7 is made of insulating material, which can be epoxy glass material, but is not limited to epoxy glass material.

[0038] Further, the number of elastic members 11 is two, and the two elastic members 11 are symmetrically arranged relative to the axis of the second pin shaft 10. Further, the elastic member 11 is a compression spring.

[0039] In the embodiment, the number of carbon plate assemblies 200 is two, and the two carbon plate assemblies 200 are symmetrically arranged relative to the center of the beam arm 7. In each carbon plate assembly 200, the two carbon sliding plates 2 supported by the four leaf springs 3 have small omnidirectional angle adaptation force, and the first hinge structure formed by the intersection of the upper supporting plate 4 and the lower supporting plate 5 prevents the leaf spring 3 from being excessively deformed to cause the mechanism to fail.

[0040] Optionally, in order to avoid the axial movement and other adverse phenomena of the joint assembly 300, the carbon plate assembly 200 further comprises a first limiting ring 12 and a second limiting ring 13, the first limiting ring 12 and the second limiting ring 13 are fixedly sleeved on the beam arm 7, and the joint assembly 300 is arranged between the first limiting ring 12 and the second limiting ring 13.

[0041] Optionally, in order to avoid the circumferential rotation of the carbon plate assembly 200, a first half key groove is formed on the end face of the beam arm 7, and a second half key groove is formed on the carbon plate seat 1. The first half key groove and the second half key groove are in butt joint to form a key groove cavity. The key groove cavity is used for pressing a connecting key, and the width of the key groove cavity is slightly larger than the width of the connecting key.

[0042] Optionally, in order to further improve the connection strength of the carbon plate assembly 200, the carbon plate assembly 200 further comprises a first connecting rod 14 and a second connecting rod 15, the first connecting rod 14 and the second connecting rod 15 are arranged opposite and spaced apart along the second direction, and the first connecting rod 14 and the second connecting rod 15 are both fixedly connected between the two carbon plate seats 1.

[0043] Optionally, the plate spring 3 has a ring structure, the top of the plate spring 3 has a first annular peripheral surface portion, the bottom of the plate spring 3 has a second annular peripheral surface portion, the second annular peripheral surface portion is provided with a gap to form two connecting segments, and the carbon plate assembly further comprises two fasteners 16, the two fasteners 16 are arranged one-to-one corresponding to the two connecting segments, and the fastener 16 is sequentially arranged through the carbon plate seat 1, the connecting segment and fixed to the lower supporting plate 5. Further, the fastener 16 is a bolt.

[0044] Optionally, the carbon plate assembly further comprises a stud 17 and a nut 18, the stud 17 is protruded on the bottom of the carbon slide plate 2, and the stud 17 is sequentially arranged through the upper supporting plate 4, the first annular peripheral surface portion, and fastened with the nut 18.

[0045] Optionally, the joint assembly 300 is arranged between the two carbon slide plates 2, and the joint assembly 300 comprises a plurality of first braided copper belts 19, a plurality of second braided copper belts 20, a copper bar 21 and a joint base 22, the copper bar 21 is fixedly arranged on the joint base 22, the joint base 22 is fixedly sleeved on the beam arm 7, one end of the plurality of first braided copper belts 19 is electrically connected with the copper bar 21, the other end of the plurality of first braided copper belts 19 is connected with one of the carbon slide plates 2, one end of the plurality of second braided copper belts 20 is electrically connected with the copper bar 21, the other end of the plurality of second braided copper belts 20 is connected with the other of the carbon slide plates 2, and one end of the high-voltage cable 23 is electrically connected with the copper bar 21. Further, the joint base 22 is made of insulating material, which can be epoxy glass material, but is not limited to epoxy glass material.

[0046] In the embodiment, the number of the first braided copper belts 19 and the second braided copper belts 20 is three, and the first braided copper belts 19 and the second braided copper belts 20 are arranged on opposite sides of the joint base 22, the copper bar 21 is folded and formed to be wrapped around the joint base 22 in a half-wrapped manner, and the copper bar 21 is fastened at the top end of the joint base 22. Of course, in other embodiments, the number and current-carrying size of the first braided copper belts 19 and the second braided copper belts 20 can be set according to specific needs, which is not limited herein.

[0047] It should be noted that the specific power transmission route of the pantograph head is as follows: the carbon slide plate 2 is in direct contact with the contact net conductor, and then the current is conducted from the bottom of the carbon slide plate 2 to the braided copper belt, and then the current is transmitted from the braided copper belt to the copper bar 21 of the joint assembly 300 through the high-voltage cable 23. Among them, the carbon slide plate 2 has good conductivity, lubricity and wear resistance, and its core function is to reliably collect the dynamic current sliding from the contact net, and the current flows from the contact net conductor into the contact surface of the carbon slide plate 2, and then conducts downward in the carbon slide plate 2 to the bottom and to the plurality of braided copper belts, the current from the plurality of braided copper belts is finally collected on the copper bar 21 of the joint assembly 300, the copper bar 21 is a rectangular copper conductor with a large cross section, which has strong current carrying capacity, stable structure and is convenient for installation of multiple connection points, which collects the dispersed current from the braided copper belt and provides a solid and reliable interface, and one or more high-voltage cables 23 with thick cross section and high insulation level are firmly connected to the copper bar 21 of the joint assembly 300 by means of bolts or pressure connection, and the current flows from the copper bar 21 into the high-voltage cable 23, and then passes through the roof insulator and enters the electrical system inside the locomotive.

[0048] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. All embodiments need not be exhaustively enumerated here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A pantograph head device, characterized in that, include: Support assembly (100); A plurality of carbon plate assemblies (200) are fixedly mounted on the support assembly (100). Each carbon plate assembly (200) includes two carbon plate seats (1) and two carbon plate slides (2). The two carbon plate seats (1) are disposed opposite to each other and spaced apart on the support assembly (100) along a first direction. The two carbon plate slides (2) are respectively disposed on the two carbon plate seats (1) and are disposed opposite to each other and spaced apart along a second direction. The first direction and the second direction are opposite to each other. The carbon plate assembly is provided between the carbon plate slide (2) and the carbon plate seat (1), and the carbon plate assembly includes a leaf spring (3), an upper support plate (4), a lower support plate (5) and a first pin (6). The upper support plate (4) is fixedly installed between the top of the carbon plate slide (2) and the leaf spring (3). The bottom of the leaf spring (3) is fixedly installed between the lower support plate (5) and the carbon plate seat (1). The upper support plate (4) and the lower support plate (5) are connected by the first pin (6) to form a first hinge structure. A plurality of connector assemblies (300) are provided in a one-to-one correspondence with a plurality of carbon plate assemblies (200), and the connector assembly (300) is electrically connected between the carbon plate (2) and the high voltage cable (23).

2. The pantograph head device according to claim 1, characterized in that, The support assembly (100) includes a beam arm (7), a hinge seat (8), a base plate (9), a second pin (10), and a plurality of elastic elements (11). The hinge seat (8) is fixedly disposed on the base plate (9), and the beam arm (7) is fixedly disposed through the carbon plate seat (1). The beam arm (7) and the hinge seat (8) are connected by the second pin (10) to form a second hinge structure. The plurality of elastic elements (11) are disposed between the beam arm (7) and the base plate (9).

3. The pantograph head device according to claim 2, characterized in that, The number of elastic elements (11) is two, and the two elastic elements (11) are arranged symmetrically with respect to the axis of the second pin (10).

4. The pantograph head device according to claim 2, characterized in that, The elastic element (11) is a compression spring.

5. The pantograph head device according to claim 2, characterized in that, The carbon plate assembly (200) further includes a first limiting ring (12) and a second limiting ring (13), both of which are fixedly sleeved on the beam arm (7), and the joint assembly (300) is disposed between the first limiting ring (12) and the second limiting ring (13).

6. The pantograph head device according to claim 2, characterized in that, The beam arm (7) is provided with a first half keyway on its end face, and the carbon plate seat (1) is provided with a second half keyway. The first half keyway and the second half keyway are mated together to form a keyway cavity, which is used to press in a connecting key.

7. The pantograph head device according to any one of claims 1-6, characterized in that, The carbon plate assembly (200) further includes a first link (14) and a second link (15), the first link (14) and the second link (15) being arranged opposite to each other and spaced apart along the second direction, and the first link (14) and the second link (15) being fixedly connected between the two carbon plate seats (1).

8. The pantograph head device according to any one of claims 1-6, characterized in that, The leaf spring (3) has a ring structure, and the top of the leaf spring (3) has a first annular circumferential surface, and the bottom of the leaf spring (3) has a second annular circumferential surface. The second annular circumferential surface has a notch to form two connecting sections. The carbon plate assembly also includes two fasteners (16). The two fasteners (16) are arranged one-to-one with the two connecting sections, and the fasteners (16) pass through the carbon plate seat (1) and the connecting sections in sequence and are fixed to the lower support plate (5).

9. The pantograph head device according to claim 8, characterized in that, The carbon plate assembly also includes a stud (17) and a nut (18). The stud (17) protrudes from the bottom of the carbon plate (2) and passes through the upper support plate (4) and the first annular circumferential surface in sequence, and is fastened to the nut (18).

10. The pantograph head device according to any one of claims 1-6, characterized in that, The connector assembly (300) is disposed between the two carbon slide plates (2), and the connector assembly (300) includes a plurality of first braided copper strips (19), a plurality of second braided copper strips (20), a copper busbar (21) and a connector base (22). The copper busbar (21) is fixedly disposed on the connector base (22), and the connector base (22) is fixedly disposed on the support assembly (100). One end of the plurality of first braided copper strips (19) is electrically connected to the copper busbar (21), and the other end of the plurality of first braided copper strips (19) is connected to one of the carbon slide plates (2). One end of the plurality of second braided copper strips (20) is electrically connected to the copper busbar (21), and the other end of the plurality of second braided copper strips (20) is connected to the other carbon slide plate (2). One end of the high-voltage cable (23) is electrically connected to the copper busbar (21).

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