Electrically powered road pantograph insulating nose

Abstract

The application discloses an electrified highway pantograph insulating head, adopts a double-head single slide plate structure, each head comprises a carbon slide plate, a spring box, a support plate, an insulator, a support arm, a bow angle, a center shaft, a connecting seat one, a connecting seat two and a support sleeve; during current collection, positive and negative insulating cables are connected with two head slide plate connection boards respectively, current is transmitted to a vehicle traction system, and an electric circuit is formed. The insulator is integrated in the head spring box support part, is fixedly connected with the head support arm and the spring box support plate respectively, the remaining head body part connected with the head is an electrically isolated area without electricity. The pantograph carbon slide plate adopts a single slide plate structure, the head structure is simplified and is beneficial to operation and maintenance. The insulator is arranged at the head spring support position, the quality of the upper part of the pantograph head spring is reduced, the pantograph pantograph is beneficial to followability, and then the current collection performance of the pantograph is improved.

Description

Technical Field

[0001] This invention relates to a pantograph for electrified highways, and more particularly to an insulated pantograph head for electrified highways. Background Technology

[0002] The insulated pantograph head of the electrified highway pantograph meets the current collection needs of electrified highway vehicles. When electrified highway vehicles use a roof-mounted pantograph for current collection, the vehicle cannot achieve circuit return through the contact wire and road surface like a high-speed train. Therefore, the electrified highway pantograph needs to be equipped with positive and negative contact wires. The pantograph needs to transmit current to the vehicle's drive system on one hand, and return the current to the contact wire to form an electrical circuit on the other hand. The positive and negative parts of the pantograph body need to be effectively insulated to ensure that the entire current collection of the vehicle forms an effective circuit.

[0003] As one of the key factors in the current collection performance of a pantograph, pantograph head following performance is related to the mass of the upper part of the pantograph head suspension spring. Reducing the mass of the upper part of the pantograph head suspension spring is beneficial to improving pantograph head following performance, thereby improving the current collection quality.

[0004] Existing technology:

[0005] Currently, traditional pantographs for electrified highways typically employ a double-pantograph head and double-sliding plate structure.

[0006] Because of the use of a double-slide structure, the bow head insulator is usually integrated under the slide and above the bow head suspension spring. The insulator increases the mass of the upper part of the bow head spring, affecting the bow head's following performance.

[0007] In view of this, the present invention is hereby proposed. Summary of the Invention

[0008] The purpose of this invention is to provide an insulated pantograph head for electrified highways to solve the aforementioned technical problems in the prior art.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] The present invention relates to an insulated pantograph head for electrified highways. The insulated pantograph head is a double-head single-plate structure. Each pantograph head includes a carbon plate 1, a spring box 2, a support plate 3, an insulator 4, a support arm 5, a pantograph angle 6, a central shaft 7, a connecting seat 1 8, a connecting seat 2 9, and a support sleeve 10.

[0011] The carbon slide plate 1 has a strip-shaped structure, including:

[0012] Carbon strip 101 is located on top of carbon slide plate 1 and is used to contact the contact wire to receive current. Slide plate mounting base 102 is located on both sides of the bottom of carbon slide plate 1. The slide plate mounting base 102 has a mounting hole in the middle. Terminal block 103 is located on both sides of the bottom of carbon slide plate 1. The terminal block 103 has a mounting hole in the middle and is used to connect with the insulated cable of the bow body, so that the current can be transmitted to the vehicle traction system through the insulated cable.

[0013] The spring box 2 has a columnar structure, including:

[0014] The upper body 201 of the spring box is located on the upper part of the spring box 2. When the spring box 2 is compressed, the upper body 201 of the spring box compresses the internal spring and moves downward. The top of the upper body 201 of the spring box is provided with a mounting hole 202 for mounting and connecting with the mounting hole in the middle of the slide plate mounting base 102. The lower body 203 of the spring box is located at the lower part of the spring box 2 for supporting the internal spring and the upper body 201 of the spring box. The lower body 203 of the spring box is provided with a mounting hole 204 in the middle of the spring box.

[0015] The support plate 3 is a plate-shaped structure, including a spring box mounting hole 301 and an insulator mounting hole 302; the spring box mounting hole 301 is used to connect and fix with the mounting hole 204 of the lower body of the spring box.

[0016] The insulator 4 has a columnar structure, comprising:

[0017] The upper base 401 is located at the top of the insulator 4. The upper base 401 is provided with positioning holes 403 and upper base mounting holes 402. The shed 406 is located in the middle of the insulator 4 and is connected to the upper base 401 and the lower base 404 by casting. It is used for electrical insulation. The lower base 404 is located at the bottom of the insulator 4. The lower base 404 is provided with lower base mounting holes 405 for connecting and fixing with the insulator mounting holes 302 on the support plate 3.

[0018] The support arm 5 is used to connect with the central shaft 7 and the insulator 4, including:

[0019] The support shaft 501 is a tubular structure that passes through the positioning hole 403 of the upper base 401 for connection with the mounting base 503. It passes through the central circular hole of the mounting base 503 and is welded into an integral structure. The support shaft 501 is provided with a support arm mounting hole 502 for connection and fastening with the mounting hole on the central shaft 7. The mounting base 503 is provided with an insulator mounting hole 504 for connection with the upper base mounting hole 402 on the insulator 4. The mounting base 503 is provided with a bow angle mounting hole 505.

[0020] Compared with the prior art, the insulated pantograph head for electrified highways provided by this invention integrates the insulator with the single-slide pantograph head, adopting a double-head single-slide structure. The insulator is integrated into the support suspension spring, effectively avoiding increasing the upper mass of the spring and improving current collection performance. It effectively solves the problem of positive and negative pole insulation of the single-slide electrified highway pantograph body. At the same time, since the pantograph head uses a single slide, the number of pantograph slides is reduced, which helps to reduce operation and maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the insulated pantograph head structure for electrified highways provided in an embodiment of the present invention;

[0022] Figure 2 This is an axonometric schematic diagram of the insulated pantograph head structure of a single electrified highway according to an embodiment of the present invention;

[0023] Figure 3 This is a top view schematic diagram of the insulated pantograph head structure of a single electrified highway according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a carbon skateboard according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the spring box according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the spring box support plate according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of an insulator according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the support arm according to an embodiment of the present invention.

[0029] In the diagram, 1. Carbon sliding plate; 101. Carbon strip; 102. Sliding plate mounting base; 103. Terminal block; 2. Spring box; 201. Upper body of spring box; 202. Mounting hole of upper body of spring box; 203. Lower body of spring box; 204. Mounting hole of lower body of spring box; 3. Support plate; 301. Mounting hole of spring box; 302. Mounting hole of insulator; 4. Insulator; 401. Upper base; 402. Mounting hole of upper base; 403. Positioning hole of upper base; 404. Lower base; 405. Mounting hole of lower base; 406. Umbrella skirt; 5. Support arm; 501. Support shaft; 502. Mounting hole of support arm; 503. Mounting base; 504. Mounting hole of insulator; 505. Mounting hole of bow angle; 6. Bow angle; 7. Central shaft; 8. Connecting seat one; 9. Connecting seat two; 10. Support sleeve. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them, and do not constitute a limitation on the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0031] First, the following explanations are provided for the terms that may be used in this article:

[0032] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0033] The terms “including,” “comprising,” “containing,” “having,” or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, “including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.)” should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0034] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0035] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0036] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0037] The contents not described in detail in the embodiments of this invention are prior art known to those skilled in the art. Where specific conditions are not specified in the embodiments of this invention, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Where the manufacturers of the reagents or instruments used in the embodiments of this invention are not specified, they are all conventional products that can be purchased commercially.

[0038] The present invention relates to an insulated pantograph head for electrified highways, wherein the insulated pantograph head is a double-pantograph head with a single-plate structure. The double-pantograph head with a single-plate structure means that it includes two pantograph heads, which respectively contact the positive electrode contact line and the negative electrode contact line, and each pantograph head has a carbon plate.

[0039] Each bow head includes a carbon sliding plate 1, a spring box 2, a support plate 3, an insulator 4, a support arm 5, a bow angle 6, a central shaft 7, a connecting seat one 8, a connecting seat two 9, and a support sleeve 10;

[0040] The carbon slide plate 1 has a strip-shaped structure, including:

[0041] Carbon strip 101 is located on top of carbon slide plate 1 and is used to contact the contact wire to receive current. Slide plate mounting base 102 is located on both sides of the bottom of carbon slide plate 1. The slide plate mounting base 102 has a mounting hole in the middle. Terminal block 103 is located on both sides of the bottom of carbon slide plate 1. The terminal block 103 has a mounting hole in the middle and is used to connect with the insulated cable of the bow body, so that the current can be transmitted to the vehicle traction system through the insulated cable.

[0042] The spring box 2 has a columnar structure, including:

[0043] The upper body 201 of the spring box is located on the upper part of the spring box 2. When the spring box 2 is compressed, the upper body 201 of the spring box compresses the internal spring and moves downward. The top of the upper body 201 of the spring box is provided with a mounting hole 202 for mounting and connecting with the mounting hole in the middle of the slide plate mounting base 102. The lower body 203 of the spring box is located at the lower part of the spring box 2 for supporting the internal spring and the upper body 201 of the spring box. The lower body 203 of the spring box is provided with a mounting hole 204 in the middle of the spring box.

[0044] The support plate 3 is a plate-shaped structure, including a spring box mounting hole 301 and an insulator mounting hole 302; the spring box mounting hole 301 is used to connect and fix with the mounting hole 204 of the lower body of the spring box.

[0045] The insulator 4 has a columnar structure, comprising:

[0046] The upper base 401 is located at the top of the insulator 4. The upper base 401 is provided with positioning holes 403 and upper base mounting holes 402. The shed 406 is located in the middle of the insulator 4 and is connected to the upper base 401 and the lower base 404 by casting. It is used for electrical insulation. The lower base 404 is located at the bottom of the insulator 4. The lower base 404 is provided with lower base mounting holes 405 for connecting and fixing with the insulator mounting holes 302 on the support plate 3.

[0047] The support arm 5 is used to connect with the central shaft 7 and the insulator 4, including:

[0048] The support shaft 501 is a tubular structure that passes through the positioning hole 403 of the upper base 401 for connection with the mounting base 503. It passes through the central circular hole of the mounting base 503 and is welded into an integral structure. The support shaft 501 is provided with a support arm mounting hole 502 for connection and fastening with the mounting hole on the central shaft 7. The mounting base 503 is provided with an insulator mounting hole 504 for connection with the upper base mounting hole 402 on the insulator 4. The mounting base 503 is provided with a bow angle mounting hole 505.

[0049] The bow angle 6 is a variable cross-section strip structure used for contact wire transition. It is located on both sides of the bow head end, and the upper part is provided with mounting holes that are connected and fixed to the bow angle mounting holes 505 on the mounting base 503.

[0050] The central shaft 7 is a tubular structure located in the middle of the pantograph head and is used to connect the support arm 5. When the pantograph is installed, the central shaft 7 is connected to the upper arm of the pantograph to support the pantograph head.

[0051] The connecting seat 8 is located at one end of the central shaft 7 and is used to connect the support arm 5 and the central shaft 7. At the same time, the connecting seat 8 is provided with mounting holes to connect with the guide rod on the pantograph, which serves to adjust the level of the pantograph head.

[0052] The connecting seat 2 9 is located at the other end of the central shaft 7 and is used to connect another support arm 5 and the central shaft 7.

[0053] The support sleeve 10 is a hollow cylindrical structure used for structural support connection when the spring box 2 is connected to the support plate 3, the support plate 3 is connected to the insulator 4, and the insulator 4 is connected to the support arm 5, in order to improve the structural connection strength.

[0054] The umbrella skirt 406 is made of epoxy resin, the support plate 3, the upper base 401, the lower base 404, the support arm 5, and the central shaft 7 are made of stainless steel, and the bow corner 6 is made of insulating material.

[0055] The insulator 4 is integrally formed with the upper base 401 and the lower base 404 by casting process.

[0056] In summary, the insulated pantograph head for electrified highways in this embodiment of the invention is a double-head, single-slide plate structure. During current collection, the positive and negative insulated cables are connected to the terminal blocks of the two pantograph head slide plates, respectively, transmitting the current to the vehicle traction system and forming an electrical circuit. The insulator is integrated into the pantograph head spring box support area and fixedly connected to the pantograph head support arm and spring box support plate. When the pantograph is working, the bottom connecting part of the insulator is a energized electrical area. The insulator insulates the circuit, making the remaining pantograph body parts connected to the pantograph head a non-energized electrical isolation area. The pantograph carbon slide plate, as a vulnerable and consumable component, adopts a single-slide plate structure, simplifying the pantograph head structure and facilitating operation and maintenance. The insulator is positioned at the pantograph head spring support location, reducing the upper mass of the pantograph head spring, which improves pantograph-catenary following performance and thus enhances the pantograph's current collection performance.

[0057] By adopting a single-slide bow head integrated insulator structure, the problem of positive and negative pole insulation of the bow body in electrified highways is effectively solved; by adopting a double-bow head single-slide structure, the insulator is integrated into the suspension spring support part, which effectively avoids increasing the upper mass of the bow head spring and improves the current collection performance.

[0058] To more clearly demonstrate the technical solution and its effects provided by the present invention, the embodiments of the present invention will be described in detail below with reference to specific examples.

[0059] Example 1

[0060] like Figure 1-8 As shown, the insulated pantograph head of the electrified highway in this embodiment is a double-head structure. Each pantograph head includes a carbon sliding plate 1, a spring box 2, a support plate 3, an insulator 4, a support arm 5, a pantograph angle 6, a central shaft 7, a connecting seat 1 8, a connecting seat 2 9, and a support sleeve 10.

[0061] Carbon skateboard 1 includes carbon strip 101, skateboard mounting base 102, and wiring board 103.

[0062] Spring box 2 includes upper body 201, upper body mounting hole 202, lower body 203, and lower body mounting hole 204.

[0063] The support plate 3 includes a spring box mounting hole 301 and an insulator mounting hole 302.

[0064] Insulator 4 includes an upper base 401, an upper base positioning hole 402, an upper base mounting hole 403, a shed 406, a lower base 404, and a lower base mounting hole 405.

[0065] The support arm 5 includes a support shaft 501, a support arm mounting hole 501, a mounting base 503, an insulator mounting hole 504, and a bow angle mounting hole 505.

[0066] Carbon slide plate 1 is fixedly connected to spring box 2 by fastening components passing through the through hole on slide plate mounting base 102 and the upper body mounting hole 202 of spring box. Spring box 2 is fixedly connected to support plate 3 by fastening components passing through the spring box mounting hole 301 and the lower body mounting hole 204 on support plate 3. Support plate 3 is fixedly connected to insulator 4 by fastening components passing through the lower base mounting hole 405 on insulator 4, the insulator mounting hole 504 on support plate 3, and the through hole of support sleeve 10. Insulator 4 is positioned by cooperating with support shaft 501 on support arm 5 through upper base positioning hole 402. Insulator 4 is fixedly connected to support arm 5 by fastening components passing through the upper base mounting hole 403 on insulator 4, support sleeve 10, and insulator mounting hole 504 on support arm 5. Support arm 5 is fixedly connected to the central shaft 7 by fastening components using connecting seat 1 8 and connecting seat 2 9 respectively.

[0067] The electrified highway pantograph of this invention features an insulated pantograph head with a double-pantograph head and a single-slide plate structure. During current collection, the positive and negative insulated cables are connected to the two pantograph head slide plates respectively, transmitting the current to the vehicle traction system and forming an electrical circuit. The insulator is integrated into the pantograph head spring box support area and fixedly connected to the pantograph head support arm and spring box support plate. When the pantograph is operating, the bottom connecting part of the insulator is a energized electrical area. The insulator insulates the circuit, making the remaining pantograph body parts connected to the pantograph head a non-energized electrical isolation area. The pantograph carbon slide plate, as a wear and tear component, adopts a single-slide plate structure, simplifying the pantograph head structure and facilitating operation and maintenance. The insulator's placement at the pantograph head spring support position reduces the upper mass of the pantograph head spring, improving pantograph-catenary following performance and thus enhancing the pantograph's current collection performance.

[0068] During installation and use, the pantograph head is connected to the pantograph body. The insulated cable terminals of the pantograph body are connected to the terminal blocks 103 on the carbon sliding plates 1 of the positive and negative pantograph heads, respectively. When the pantograph is collecting current, one pantograph head carbon sliding plate 1 is in contact with the positive contact wire, and the other pantograph head carbon sliding plate 1 is in contact with the negative contact wire. Since the pantograph head is equipped with an insulator and the pantograph body cable is an insulated cable, the current cannot pass through the insulator. Therefore, the pantograph head and pantograph body parts behind the insulator are in a non-energized state, preventing the pantograph body from conducting the positive and negative terminals of the contact wire. The current is transmitted to the electrified highway vehicle traction system through the carbon sliding plate 1 of one pantograph head and the insulated cable of the pantograph body. It then forms a circuit with the contact wire through the carbon sliding plate 1 of the other pantograph head, driving the vehicle to run.

[0069] By adopting a single-slide pantograph head integrated insulator structure, the problem of positive and negative pole insulation of the pantograph body in electrified highways is effectively solved. Meanwhile, pantograph head following performance is one of the key factors in pantograph current collection performance. Good pantograph-catenary following performance is related to the upper mass of the pantograph head suspension spring; reducing the upper mass of the pantograph head suspension spring helps improve pantograph-catenary following performance, thereby improving current collection quality.

[0070] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of the present invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. An insulated pantograph head for electrified highways, characterized in that, The insulating bow head is a double bow head single plate structure. Each bow head includes a carbon plate (1), a spring box (2), a support plate (3), an insulator (4), a support arm (5), a bow angle (6), a central shaft (7), a connecting seat one (8), a connecting seat two (9), and a support sleeve (10). The carbon slide plate (1) has a strip-shaped structure, comprising: The carbon strip (101) is located on the top of the carbon slide plate (1) and is used to contact the contact wire to receive current. The slide plate mounting base (102) is located on both sides of the bottom of the carbon slide plate (1). The slide plate mounting base (102) has a mounting hole in the middle. The terminal block (103) is located on both sides of the bottom of the carbon slide plate (1). The terminal block (103) has a mounting hole in the middle and is used to connect with the insulated cable of the bow body, so that the current can be transmitted to the vehicle traction system through the insulated cable. The spring box (2) has a columnar structure, including: The upper body (201) of the spring box is located on the upper part of the spring box (2). When the spring box (2) is compressed, the upper body (201) of the spring box compresses the internal spring and moves downward. The top of the upper body (201) of the spring box is provided with a mounting hole (202) for mounting and connecting with the mounting hole in the middle of the slide plate mounting base (102). The lower body (203) of the spring box is located at the lower part of the spring box (2) for supporting the internal spring and the upper body (201) of the spring box. The lower body (203) of the spring box is provided with a mounting hole (204) in the middle of the spring box; The support plate (3) is a plate-shaped structure, including a spring box mounting hole (301) and an insulator mounting hole (302); the spring box mounting hole (301) is used to connect and fix with the lower body mounting hole (204) of the spring box; The insulator (4) has a columnar structure, comprising: The upper base (401) is located at the top of the insulator (4). The upper base (401) is provided with positioning holes (403) and upper base mounting holes (402). The awning (406) is located in the middle of the insulator (4) and is connected to the upper base (401) and the lower base (404) by casting. It is used for electrical insulation. The lower base (404) is located at the bottom of the insulator (4). The lower base (404) is provided with lower base mounting holes (405) for connecting and fixing with the insulator mounting holes (302) on the support plate (3). The support arm (5) is used to connect with the central shaft (7) and the insulator (4), and includes: The support shaft (501) is a tubular structure that passes through the positioning hole (403) of the upper base (401) for connection with the mounting base (503). It passes through the central circular hole of the mounting base (503) and is welded into an integral structure. The support shaft (501) is provided with a support arm mounting hole (502) for connection and fastening with the mounting hole on the central shaft (7). The mounting base (503) is provided with an insulator mounting hole (504) for connection with the upper base mounting hole (402) on the insulator (4). The mounting base (503) is provided with a bow angle mounting hole (505).

2. The insulated pantograph head for electrified highways according to claim 1, characterized in that, The bow angle (6) is a variable cross-section strip structure used for contact line transition. It is located on both sides of the bow head end and has mounting holes on the upper part to connect and fix with the bow angle mounting holes (505) on the mounting base (503).

3. The insulated pantograph head for electrified highways according to claim 2, characterized in that, The central shaft (7) is a tubular structure located in the middle of the bow head and is used to connect the support arm (5). When the pantograph is installed, the central shaft (7) is connected to the upper arm of the pantograph to support the bow head.

4. The insulated pantograph head for electrified highways according to claim 3, characterized in that, The connecting seat 1 (8) is located at one end of the central shaft (7) and is used to connect the support arm (5) and the central shaft (7). At the same time, the connecting seat 1 (8) is provided with mounting holes to connect with the guide rod on the pantograph, which plays the role of adjusting the horizontality of the pantograph head. The connecting seat 2 (9) is located at the other end of the central shaft (7) and is used to connect another support arm (5) and the central shaft (7).

5. The insulated pantograph head for electrified highways according to claim 4, characterized in that, The support sleeve (10) is a hollow cylindrical structure used for structural support connection when the spring box (2) is connected to the support plate (3), the support plate (3) is connected to the insulator (4), and the insulator (4) is connected to the support arm (5), in order to improve the structural connection strength.

6. The insulated pantograph head for electrified highways according to claim 5, characterized in that, The umbrella skirt (406) is made of epoxy resin, the support plate (3), upper base (401), lower base (404), support arm (5), and central shaft (7) are made of stainless steel, and the bow corner (6) is made of insulating material.

7. The insulated pantograph head for electrified highways according to claim 6, characterized in that, The insulator (4) is integrally formed with the upper base (401) and the lower base (404) by casting process.

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