Pantograph body insulation structure without supporting insulator

Abstract

The invention discloses a support insulator-free pantograph body insulation structure, a pantograph body is composed of a bottom frame, a lower arm, a lower guide rod, an upper arm, an upper guide rod and a pantograph head, the lower arm and the lower guide rod of the pantograph body are integrated with an insulator, and a pantograph is divided into an electrified area and a non-electrified area. When the pantograph works, due to the fact that the insulator blocks current, the upper portion of the insulator is an electrified area, the lower portion of the insulator is a non-electrified area, and the current is conveyed to a vehicle traction system through connection of a roof conducting rod and the electrified portion of the upper portion of the pantograph insulator. A pantograph supporting insulator is omitted, so that the resistance and the weight of a pantograph area can be effectively reduced, and the running energy consumption of the whole vehicle can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to a pantograph for EMUs, and particularly to an insulating structure for the pantograph body of a pantograph without a support insulator. Background Art

[0002] During the development of new high-speed EMUs, it is required to minimize the running resistance of the vehicle and thus reduce the running energy consumption of the vehicle. As a roof equipment for the EMU to obtain current from the high-voltage catenary, the entire pantograph body is in a conductive state during operation. The traditional pantograph for EMUs transmits the catenary current through the pantograph body to the vehicle top wiring terminal, and then transmits the current to the in-vehicle traction system through cables to drive the vehicle to run.

[0003] As an exposed component on the roof, the pantograph accounts for a relatively large proportion of the resistance during the operation of the EMU. Since the pantograph is in a live state in contact with the high-voltage catenary during operation, the pantograph is usually supported by relatively high support insulators to ensure the high-voltage insulation between the roof and the pantograph.

[0004] In the prior art, in order to reduce the resistance in the pantograph area, high-speed EMUs usually carry out a concave design in the pantograph installation area to reduce the resistance of the insulator. However, due to the limited internal space of the EMU, the depth of the concave area on the roof is limited, and the resistance reduction effect is limited.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The object of the present invention is to provide an insulating structure for the pantograph body of a pantograph without a support insulator to solve the above technical problems existing in the prior art.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] The insulating structure for the pantograph body of the pantograph without a support insulator of the present invention includes an insulating lower arm and an insulating lower guide rod;

[0009] The insulating lower arm includes a lower arm one 1, a lower arm insulator 2, and a lower arm two 3 that are sequentially connected through a connecting component one 4;

[0010] The insulating lower guide rod includes a lower guide rod one 6, a lower guide rod insulator 7, and a lower guide rod two 8 that are sequentially connected through a connecting component two 9. Joint bearings 5 are respectively provided at the outer ends of the lower guide rod one 6 and the lower guide rod two 8.

[0011] Compared with the prior art, the insulating structure for the pantograph body of the pantograph without a support insulator provided by the present invention realizes the application requirement of canceling the support insulator of the pantograph for the EMU. For the pantograph of the EMU without a support insulator, the resistance in the pantograph area can be further reduced, and the insulating components and the pantograph body are integrally designed. Thus, the support insulator of the pantograph can be canceled, reducing the running resistance of the vehicle and thus reducing the running energy consumption. Brief Description of the Drawings

[0012] Figure 1 Schematic diagram of the insulating structure of the pantograph bow body without a support insulator provided by an embodiment of the present invention;

[0013] Figure 2 Schematic diagram of the composition of the insulating lower arm structure according to an embodiment of the present invention;

[0014] Figure 3 Schematic diagram of the partial sectional structure of the insulating lower arm according to an embodiment of the present invention;

[0015] Figure 4 Schematic diagram of the composition of the insulating lower guide rod structure according to an embodiment of the present invention;

[0016] Figure 5 Schematic diagram of the partial sectional structure of the insulating lower guide rod according to an embodiment of the present invention;

[0017] In the figure, 1, the first lower arm; 10, the first lower arm tube; 11, the flange; 2, the lower arm insulator; 20, the insulator flange; 21, the first umbrella skirt; 22, the first core body; 3, the second lower arm; 30, the second lower arm tube; 4, the first connection assembly; 5, the spherical plain bearing; 6, the first lower guide rod; 61, the connection seat; 7, the lower guide rod insulator; 71, the insulator connection seat; 72, the second umbrella skirt; 73, the second core body; 8, the second lower guide rod; 9, the second connection assembly. Detailed Description of the Invention

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments, which do not constitute a limitation to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] First, the following explanations are given for the terms that may be used in this article:

[0020] Descriptions with semantic meanings such as "including", "comprising", "containing", "having" or other similar ones should be interpreted as non-exclusive inclusion. For example: including a certain technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.) should be interpreted as not only including the clearly listed certain technical feature element, but also including other well-known technical feature elements in the art that are not clearly listed.

[0021] The term "consisting of" means excluding any technical feature elements not expressly listed. If this term is used in a claim, it will make the claim closed, so that it does not include technical feature elements other than those expressly listed, except for conventional impurities related thereto. If this term only appears in a certain clause of a claim, then it only limits the elements expressly listed in that clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0022] Unless otherwise expressly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this text can be understood according to specific circumstances.

[0023] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description, rather than expressly or impliedly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this text.

[0024] The content not described in detail in the embodiments of the present invention belongs to the prior art well-known to those of ordinary skill in the art. For those conditions not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the reagents or instruments not indicating the manufacturer in the embodiments of the present invention, they are all conventional products that can be obtained through commercial purchase.

[0025] The unsupported insulator pantograph bow body insulation structure of the present invention includes an insulating lower arm and an insulating lower guide rod;

[0026] The insulating lower arm includes a lower arm one 1, a lower arm insulator 2, and a lower arm two 3 that are sequentially connected through a connection component one 4;

[0027] The insulating lower guide rod includes a lower guide rod one 6, a lower guide rod insulator 7, and a lower guide rod two 8 that are sequentially connected through a connection component two 9. Joint bearings 5 are respectively provided at the outer ends of the lower guide rod one 6 and the lower guide rod two 8.

[0028] The lower arm 1 includes a lower arm tube 10 with a cavity tubular structure, which is used to connect with the pantograph underframe. The end of the lower arm tube 10 is welded to the flange 11. Columnar bosses are respectively arranged at both ends of the flange 11, which are respectively used for positioning with the lower arm tube 10 and the insulator flange 20. Installation holes are opened in the circumferential direction of the flange 11, which are used to be fixedly connected with the connection holes on the insulator flange 20 through the first connection component 4;

[0029] The lower arm insulator 2 has a columnar structure. Insulator flanges 20 are respectively arranged at both ends of the lower arm insulator 2, which are respectively used for connecting with the flange 11 and fixing the first core 22. The first core 22 is externally connected with the first umbrella skirt 21, and the first umbrella skirt 21 is used to increase the creepage distance of the lower arm insulator 2 so as to meet the electrical insulation requirements.

[0030] The lower arm 3 includes a lower arm tube 30 with a cavity tubular structure, which is used to connect with the pantograph upper arm. The end of the lower arm tube 30 is welded to the flange 11. Columnar bosses are arranged at both ends of the flange 11, which are respectively used for positioning with the lower arm tube 30 and the insulator flange 20. Installation holes are opened in the circumferential direction of the flange 11, which are used to be fixedly connected with the connection holes on the insulator flange 20 through the first connection component 4.

[0031] The spherical plain bearing 5 is connected with the first lower guide rod 6 and the second lower guide rod 8 by means of threads.

[0032] The first lower guide rod 6 has a cavity tubular structure. One end of the first lower guide rod 6 is connected to the spherical plain bearing 5 and then connected to the pantograph underframe. The other end of the first lower guide rod 6 is welded to the connection seat 61, and after the connection seat 61 is welded to the first lower guide rod 6, it is connected to the insulator connection seat 71 through the second connection component 9.

[0033] The lower guide rod insulator 7 has a columnar structure. Insulator connection seats 71 are respectively arranged at both ends of the lower guide rod insulator 7, which are used to connect with the connection seat 61 and fix the second core 73. The second core 73 is externally connected with the second umbrella skirt 72, and the second umbrella skirt 72 is used to increase the creepage distance of the lower guide rod insulator 7 so as to meet the electrical insulation requirements.

[0034] The second lower guide rod 8 has a cavity tubular structure. One end of the second lower guide rod 8 is connected to the spherical plain bearing 5 and then connected to the pantograph upper arm. The other end of the second lower guide rod 8 is welded to the connection seat 61, and after the connection seat 61 is welded to the second lower guide rod 8, it is connected to the insulator connection seat 71 through the second connection component 9.

[0035] The first core 22 and the second core 73 are made of epoxy glass fiber material, and the first umbrella skirt 21 and the second umbrella skirt 72 are made of silicone rubber material.

[0036] The lower arm 1 and the lower arm 3 are made of carbon steel material, and the first lower guide rod 6 and the second lower guide rod 8 are made of stainless steel material.

[0037] In summary, the unsupported insulator pantograph bow body insulation structure according to the embodiments of the present invention integrates the insulator on the pantograph bow body, thereby eliminating the support insulator of the pantograph. This solves the problem that the support insulator of the pantograph of high-speed EMUs has a large running resistance, increasing the vehicle's running energy consumption.

[0038] The present invention integrates the insulator with the lower arm and the lower guide rod of the pantograph, so that the upper part of the pantograph insulator is the energized area and the lower part of the insulator is the non-energized area. The current is connected to the upper energized area of the pantograph through the conductive rod to transmit the current to the in-vehicle traction system. A train is equipped with two pantographs. When the vehicle is running, only one pantograph is raised for current collection. The working pantograph is in the raised state, and the standby pantograph is in the lowered state. After eliminating the relatively high support insulator at the bottom of the pantograph, for the working pantograph, there is no resistance brought by the pantograph support insulator, and at the same time, the part of the pantograph underframe with a large resistance can completely fall into the depression area on the roof, greatly reducing the resistance in the pantograph area; for the non-working state standby lowered pantograph, the absence of the support insulator can effectively reduce the lowering height of the non-working pantograph, making the non-working pantograph basically in the depression area of the roof pantograph, further reducing the resistance in the pantograph area; eliminating the pantograph support insulator can further reduce the weight in the pantograph area. To sum up, the bow body insulation design of the pantograph and the elimination of the pantograph support insulator will effectively reduce the resistance in the pantograph area and also reduce the weight in the pantograph area, effectively reducing the running energy consumption of the whole vehicle.

[0039] In order to more clearly show the technical solutions provided by the present invention and the technical effects produced, the following describes in detail the embodiments provided by the present invention with specific examples.

[0040] Embodiment 1

[0041] As Figures 1 to 5 shown:

[0042] The unsupported insulator pantograph bow body insulation structure of the present invention specifically divides the pantograph into an energized area and a non-energized area by integrating the insulator with the lower arm and integrating the insulator with the lower guide rod respectively. Since the underframe connecting the pantograph to the roof is a non-energized area, the support insulator used to connect the existing pantograph to the vehicle top can be eliminated. The current is transmitted to the vehicle traction system through the conductive rod structure connected to the energized area of the lower arm. The specific components of the pantograph include a bow head, an upper arm, an upper guide rod, a lower arm, a lower guide rod, an underframe, and a conductive rod. The pantograph bow body insulation structure described in the present invention is mainly realized by insulating design with the lower arm and the lower guide rod embedded in the insulator in the pantograph bow body.

[0043] As Figures 1 - 5As shown in the figure, for the pantograph body insulation structure of this embodiment, the insulators are integrally designed with the lower arm and the lower guide rod of the pantograph respectively. The current from the catenary is insulated by the insulating lower arm and the lower guide rod of the pantograph body.

[0044] The insulating lower arm includes lower arm one 1, lower arm insulator 2, lower arm two 3, and connecting component one 4.

[0045] The insulating lower guide rod includes a spherical plain bearing 5, lower guide rod one 6, lower guide rod insulator 7, lower guide rod two 8, and connecting component two 9.

[0046] For the pantograph body insulation structure of the unsupported insulator of the present invention, lower arm one 1 is connected to the pantograph underframe, lower arm two 3 is connected to the pantograph upper arm. By setting the lower arm insulator 2 in the middle of lower arm one 1 and lower arm two 3, the electrical insulation of the lower arm structure of the pantograph is realized. Lower guide rod one 6 is connected to the pantograph underframe, lower guide rod two 8 is connected to the pantograph upper arm. By setting the lower guide rod insulator 7 in the middle of lower guide rod one 6 and lower guide rod two 8, the electrical insulation of the lower guide rod structure of the pantograph is realized. When the pantograph receives current, the pantograph head contacts the catenary. The areas of the pantograph head, upper arm, upper guide rod, lower arm two 3, and lower guide rod two 8 are live areas. Since the lower arm insulator 2 is provided between lower arm one 1 and lower arm two 3, and the lower guide rod insulator 7 is provided between lower guide rod one 6 and lower guide rod two 8, the current cannot flow through the pantograph body, and the pantograph body forms a live area and a non-live area. Among them, the underframe, lower arm one 1, and lower guide rod 6 are in the non-live area under the action of the insulator. When the pantograph works specifically, the current flows from the pantograph head to the upper arm, and then the current is transmitted to the vehicle traction system by the conducting rod to drive the vehicle to run.

[0047] The beneficial effects brought by the technical solution of the present invention:

[0048] To solve the problem that the pantograph support insulator of high-speed EMUs has a large running resistance, increasing the vehicle's running energy consumption, a pantograph body insulation structure without a support insulator is provided. By integrating the insulator into the pantograph body, the pantograph support insulator is thus eliminated. In the present invention, the insulator is integrally designed with the lower arm and the lower guide rod of the pantograph, so that the upper part of the pantograph insulator is a live area and the lower part of the insulator is a non-live area. The current is connected to the live area of the upper part of the pantograph through the conductive rod and transmitted to the on-board traction system. A train is equipped with two pantographs. When the vehicle is running, only one pantograph is raised for current collection. The working pantograph is in the raised state, and the standby pantograph is in the lowered state. After eliminating the relatively high support insulator at the bottom of the pantograph, there is no resistance brought by the pantograph support insulator for the working pantograph. At the same time, the part of the underframe with a large pantograph resistance can completely fall into the concave area of the roof, greatly reducing the resistance in the pantograph area; for the standby lowered pantograph in the non-working state, the absence of the support insulator can effectively reduce the lowering height of the non-working pantograph, making the non-working pantograph basically in the concave area of the roof pantograph, further reducing the resistance in the pantograph area; eliminating the pantograph support insulator can further reduce the weight in the pantograph area. In summary, insulating the pantograph body and eliminating the pantograph support insulator will effectively reduce the resistance in the pantograph area and also reduce the weight in the pantograph area, which is beneficial to reducing the running energy consumption of the whole vehicle.

[0049] The technical key points of the present invention:

[0050] By integrating the insulator with the lower arm and integrating the insulator with the lower guide rod respectively, the pantograph is divided into a live area and a non-live area during operation. Since the underframe connecting the pantograph to the roof is a non-live area, the support insulator used for connecting the existing pantograph to the vehicle top can be eliminated. The current is transmitted to the vehicle traction system through the conductive rod structure connected to the live area of the upper arm. The specific components of the pantograph include the pantograph head, upper arm, upper guide rod, lower arm, lower guide rod, underframe, and conductive rod. The pantograph body insulation structure described in the present invention is mainly achieved by insulating design with the lower arm and the lower guide rod embedded in the pantograph body.

[0051] As mentioned above, the above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art.

Claims

1. A pantograph body insulation structure without supporting insulator, characterized in that: It includes an insulating lower arm and an insulating lower guide rod; The insulating lower arm comprises a lower arm one (1), a lower arm insulator (2), and a lower arm two (3) which are sequentially connected via a connecting assembly one (4); The insulating lower guide rod comprises a lower guide rod 1 (6), a lower guide rod insulator (7) and a lower guide rod 2 (8) which are sequentially connected via a connecting assembly 2 (9); the outer ends of the lower guide rod 1 (6) and the outer ends of the lower guide rod 2 (8) are respectively provided with joint bearings (5).

2. The pantograph insulation structure without support insulator according to claim 1, characterized in that: The lower arm one (1) comprises a lower arm tube one (10) of a hollow tubular structure, which is used to be connected to the pantograph base frame. The end of the lower arm tube one (10) is welded to the flange (11). Both ends of the flange (11) are respectively provided with columnar bosses, which are respectively used to position the lower arm tube one (10) and the insulator flange (20). The flange (11) is provided with mounting holes around it, which are used to be fastened to the connection holes on the insulator flange (20) through a connection assembly one (4).

3. The pantograph insulation structure without support insulator according to claim 2, characterized in that: The lower arm insulator (2) is a columnar structure. Both ends of the lower arm insulator (2) are provided with insulator flanges (20) respectively, which are used to connect with the flanges (11) and fix the core body (22). The core body (22) is externally connected to the shed (21). The shed (21) is used to increase the creepage distance of the lower arm insulator (2) so as to meet the electrical insulation requirements.

4. The pantograph insulation structure without support insulator according to claim 3, characterized in that: The lower arm 2 (3) comprises a lower arm tube 2 (30) of a hollow tubular structure, which is used to be connected to the upper arm of the pantograph. The end of the lower arm tube 2 (30) is welded to the flange (11). Columnar bosses are provided at both ends of the flange (11), which are respectively used to position the lower arm tube 2 (30) and the insulator flange (20). The flange (11) is provided with mounting holes around it, which are used to be fastened to the connection holes on the insulator flange (20) through a connection assembly 1 (4).

5. The pantograph insulation structure without support insulator according to claim 4, characterized in that: The joint bearing (5) is connected to the lower guide rod 1 (6) and the lower guide rod 2 (8) by means of threads.

6. The pantograph insulation structure without support insulator according to claim 5, characterized in that: The lower guide rod 1 (6) is a hollow tubular structure. One end of the lower guide rod 1 (6) is connected to the joint bearing (5) and then connected to the pantograph base frame. The other end of the lower guide rod 1 (6) is welded to the connecting seat (61). The connecting seat (61) and the lower guide rod 1 (6) are welded and then connected to the insulator connecting seat (71) through the connecting assembly 2 (9).

7. The pantograph insulation structure without support insulator according to claim 6, characterized in that: The lower guide rod insulator (7) is a columnar structure. Insulator connection seats (71) are respectively provided at both ends of the lower guide rod insulator (7) for connecting with the connection seat (61) and fixing the second core (73). The second core (73) is externally connected to the second shed (72). The second shed (72) is used to increase the creepage distance of the lower guide rod insulator (7) so as to meet the electrical insulation requirements.

8. The pantograph insulation structure without support insulator according to claim 1, characterized in that: The lower guide rod 2 (8) is a hollow tubular structure. One end of the lower guide rod 2 (8) is connected to the joint bearing (5) and then connected to the upper arm of the pantograph. The other end of the lower guide rod 2 (8) is welded to the connecting seat (61). The connecting seat (61) and the lower guide rod 2 (8) are welded and then connected to the insulator connecting seat (71) through the connecting assembly 2 (9).

9. The pantograph insulation structure of an unsupported insulator according to any one of claims 1 to 8, characterized in that: The core body 1 (22) and the core body 2 (73) are made of epoxy glass fiber material, and the umbrella skirt 1 (21) and the umbrella skirt 2 (72) are made of silicone rubber material.

10. The pantograph insulation structure of an unsupported insulator according to any one of claims 1 to 8, characterized in that: The lower arm 1 (1) and the lower arm 2 (3) are made of carbon steel, and the lower guide rod 1 (6) and the lower guide rod 2 (8) are made of stainless steel.

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