Pantograph system and rail train

Abstract

The utility model provides a kind of pantograph system and track train, and pantograph system includes pantograph and at least one group first limiting component.Pantograph includes underframe and lower arm.Underframe is set to the roof of track vehicle.Lower arm has first connecting part and the lower arm body being set to first connecting part, and lower arm body is pivotably connected to underframe by first connecting part, to make lower arm be configured as rotating around the axis of rotation.First limiting component includes first limiting block and second limiting block.First limiting block is set to underframe, and it is located the circumferential outside of rotation axis.Second limiting block is set to first connecting part, and swing along with lower arm. Among them, pantograph is configured to be lifted between lower first position and higher second position, and second position is lower than the position of pantograph's lifting bow, in the state that pantograph is in second position, second limiting block and first limiting block abut, to make pantograph keep in second position.

Description

Technical Field

[0001] This utility model relates to rail trains, and more particularly to a pantograph system and a rail train. Background Technology

[0002] The teaching EMU is a special EMU used for teaching demonstrations, operation training and experimental research. For example, it can be used in teaching projects such as battery emergency traction and pantograph raising and lowering operation.

[0003] In teaching scenarios, the sites of various teaching projects may overlap. Therefore, during the use of battery-powered emergency traction, the pantograph of the teaching train may scrape against the overhead contact line or become energized, causing a short circuit in the rail vehicle.

[0004] In related technologies, the current methods to prevent short circuits are to prohibit the pantograph from being raised when the battery is being used for traction, or to ensure that there is no high voltage before the battery is used for traction. However, in actual teaching, since the pantograph can be raised and lowered without restriction, there is still a safety hazard. Utility Model Content

[0005] To address at least one of the aforementioned and other technical problems in the prior art, this utility model provides a pantograph system to limit the raising and lowering of the pantograph. In view of this, this utility model provides a pantograph system including a pantograph and at least one set of first limiting components. The pantograph includes a base frame and a lower arm. The base frame is mounted on the roof of a rail vehicle. The lower arm has a first connecting portion and a lower arm body disposed on the first connecting portion. The lower arm body is pivotally connected to the base frame via the first connecting portion, such that the lower arm is configured to rotate about an axis of rotation. The first limiting components include a first limiting block and a second limiting block. The first limiting block is disposed on the base frame and located circumferentially outside the axis of rotation. The second limiting block is disposed on the first connecting portion and swings with the lower arm. The pantograph is configured to rise and fall between a lower first position and a higher second position, the second position being lower than the pantograph's raised position. When the pantograph is in the second position, the second limiting block abuts against the first limiting block to hold the pantograph in the second position.

[0006] Optionally, the pantograph system also includes a force transmission frame. A first end of the force transmission frame is connected to a first connecting portion. A second limiting block is disposed on the force transmission frame.

[0007] Optionally, the pantograph system also includes a lifting airbag. The lifting airbag is mounted on the base frame. The output end of the lifting airbag is connected to the other end of the force transmission frame to drive the pantograph to rise and fall between a first position and a second position.

[0008] Optionally, the outer periphery of the first connecting part has at least two connecting positions arranged circumferentially, and the second limiting block is detachably connected to one of the connecting positions.

[0009] Optionally, the pantograph system also includes at least two sets of first limiting components, which are symmetrically arranged on both sides of the lower arm body.

[0010] Optionally, the lower arm, at the end furthest from the base frame, also has a second connecting portion. The pantograph also includes an upper arm, which includes a third connecting portion and an upper arm body disposed on the third connecting portion. The extension direction of the third connecting portion is parallel to the extension direction of the second connecting portion, and they are pivotally connected by a connector.

[0011] Optionally, the pantograph system also includes a pull rod. One end of the pull rod is pivotally connected to the base frame. The upper arm also has a connecting plate disposed at the third connection portion and extending radially outward along the third connection portion, the end of the connecting plate away from the third connection portion being pivotally connected to the other end of the pull rod.

[0012] Optionally, the pantograph system further includes a second limiting assembly. The second limiting assembly includes a third limiting block and a fourth limiting block. The third limiting block is disposed on the outer periphery of the second connecting portion. The fourth limiting block is disposed on the connecting plate and faces the third limiting block. Wherein, in the state where the first limiting assembly fails, the fourth limiting block is configured to abut against the third limiting block, so that the pantograph is held in a third position, higher than the second position and lower than the raised pantograph position.

[0013] Optionally, the pantograph system further includes a detection component and a pantograph lowering component. The detection component is disposed on the contact surface of the third or fourth limit block and is adapted to output a detection signal when the third and fourth limit blocks are in contact. The pantograph lowering component and the detection component are communicatively connected, and the pantograph lowering component is configured to lower the pantograph to a first position when the detection signal is received.

[0014] This utility model also provides a rail train, including a rail vehicle and the aforementioned pantograph system. The pantograph system is mounted on the roof of the rail vehicle.

[0015] According to this embodiment of the invention, the abutment of the first limiting block on the base frame and the second limiting block on the first connecting part restricts the swing of the lower arm, keeping the pantograph in a second position lower than the raising position, thereby preventing the pantograph from contacting the overhead contact line. By raising and lowering the pantograph between the lower first position and the higher second position, the teaching project of pantograph raising and lowering operations is ensured to proceed smoothly. At the same time, it effectively prevents problems such as pantograph contact with the overhead contact line caused by operator error, leading to pantograph scraping or short circuits in the rail vehicle due to a live pantograph, thus ensuring the safety of pantograph operation during teaching. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0017] Figure 1 This schematic diagram illustrates the overall structure of a pantograph system according to an embodiment of the present invention.

[0018] Figure 2 This schematic diagram illustrates the state of the first limiting component on one side of the base frame when the pantograph is raised according to an embodiment of the present invention.

[0019] Figure 3 This schematic diagram illustrates the state of the first limiting component on one side of the base frame when the pantograph is lowered according to an embodiment of the present invention.

[0020] Figure 4 A partial schematic diagram of a pantograph system without a first limiting component according to an embodiment of the present invention is shown;

[0021] Figure 5 A partial schematic diagram of a pantograph system with a first limiting component according to an embodiment of the present invention is shown.

[0022] Figure 6 This schematic diagram illustrates the state of the first limiting component on the other side of the base frame when the pantograph is raised according to an embodiment of the present invention.

[0023] Figure 7 This schematic diagram illustrates the state of the first limiting component on the other side of the base frame when the pantograph is lowered according to an embodiment of the present invention.

[0024] Figure 8 The schematic diagram shows a partial view of a pantograph system with a second limiting component according to an embodiment of the present invention.

[0025] Figure 9 This schematic diagram illustrates a partial view from another perspective of a pantograph system with a second limiting component according to an embodiment of the present invention.

[0026] Figure 10 This schematically illustrates a partial view of a pantograph system with a second limiting component according to an embodiment of the present invention.

[0027] Figure 11 This schematically illustrates a partial view of a pantograph system with a second limiting component according to an embodiment of the present invention.

[0028] Figure 12A schematic diagram illustrating the communication connection of a pantograph system according to an embodiment of the present invention is shown.

[0029] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0030] 1-Base frame;

[0031] 2-Lower arm; 21-First connecting part; 22-Lower arm body; 23-Second connecting part;

[0032] 3-First limiting component; 31-First limiting block; 32-Second limiting block;

[0033] 4-Force transmission frame;

[0034] 5-Lifting bow airbag;

[0035] 6-Upper arm; 61-Third connecting part; 62-Upper arm body;

[0036] 7-Connectors;

[0037] 8-Pull-down lever;

[0038] 9-Connecting plate;

[0039] 10-Second limiting component; 101-Third limiting block; 102-Fourth limiting block;

[0040] 11-Detection components;

[0041] 12-Lift Solenoid Valve. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0044] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0045] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0046] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0047] Figure 1 The diagram schematically illustrates the overall structure of a pantograph system according to an embodiment of the present invention. Figure 2 The diagram illustrates the state of the first limiting component on one side of the base frame when the pantograph is raised according to an embodiment of the present invention. Figure 3 The diagram illustrates the state of the first limiting component on one side of the base frame when the pantograph is lowered according to an embodiment of the present invention.

[0048] like Figures 1-3 As shown, this utility model provides a pantograph system, including a pantograph and at least one set of first limiting components 3. The pantograph includes a base frame 1 and a lower arm 2. The base frame 1 is mounted on the roof of a rail vehicle. The lower arm 2 has a first connecting portion 21 and a lower arm body 22 disposed on the first connecting portion 21. The lower arm body 22 is pivotally connected to the base frame 1 through the first connecting portion 21, so that the lower arm 2 is configured to rotate about the axis of a rotation shaft. The first limiting components 3 include a first limiting block 31 and a second limiting block 32. The first limiting block 31 is disposed on the base frame 1 and located circumferentially outside the rotation shaft. The second limiting block 32 is disposed on the first connecting portion 21 and swings with the lower arm 2. The pantograph is configured to rise and fall between a lower first position and a higher second position, the second position being lower than the pantograph's raised position. When the pantograph is in the second position, the second limiting block 32 abuts against the first limiting block 31 to keep the pantograph in the second position.

[0049] According to an embodiment of this utility model, the base frame 1 includes a frame portion and a connecting portion. The frame portion is formed by two horizontal plates and two vertical plates. The connecting portion is disposed at the bottom of the vertical plates. The bottom of both the frame portion and the connecting portion are mounted on the roof via supporting insulators to block the conduction of current from the pantograph to the roof structure. The first connecting portion 21 and the lower arm body 22 are both cylindrical. The axial direction of the first connecting portion 21 is parallel to the length direction of the horizontal plates of the base frame 1, and the axial direction of the lower arm body 22 is perpendicular to the axial direction of the first connecting portion 21. One end face of the lower arm body 22 is connected to the middle of the first connecting portion 21. The connection method between the first connecting portion 21 and the lower arm body 22 includes, but is not limited to, integral molding.

[0050] According to an embodiment of the present invention, both the first limiting block 31 and the second limiting block 32 include a bottom plate. The first limiting block 31 also includes a first head plate integrally formed with the bottom plate, and the second limiting block 32 also includes a second head plate integrally formed with the bottom plate. The first head plate, the second head plate, and the bottom plate are all rectangular plates. The length of the first head plate and the length of the second head plate are both equal to the width of the bottom plate.

[0051] According to this embodiment of the utility model, when the pantograph is raised, the lower arm 2 moves upward relative to the base frame 1 until the pantograph reaches the raised position, i.e., the pantograph contacts the contact wire; when the pantograph is lowered, the lower arm 2 moves downward relative to the base frame 1 until the pantograph reaches the first position. Furthermore, the second limiting block 32 is located below the first limiting block 31. When the lower arm 2 moves upward relative to the base frame 1, the second limiting block 32 abuts against the first limiting block 31, constraining the lower arm 2, and the pantograph can only reach the second position, at which point the pantograph does not contact the contact wire. When the pantograph is lowered, the second limiting block 32 disengages from the first limiting block 31, and the pantograph can reach the first position.

[0052] According to this embodiment of the invention, the abutment of the first limiting block 31 on the base frame 1 and the second limiting block 32 on the first connecting part 21 restricts the swing of the lower arm 2, keeping the pantograph in a second position lower than the raising position, thereby preventing the pantograph from contacting the overhead contact line. By raising and lowering the pantograph between the lower first position and the higher second position, the teaching project of pantograph raising and lowering operations is ensured to proceed smoothly. At the same time, it effectively prevents problems such as pantograph contact with the overhead contact line caused by operator error, leading to pantograph scraping or short circuits in the rail vehicle due to a live pantograph, thus ensuring the safety of pantograph operation during teaching.

[0053] Figure 4 A partial schematic diagram of a pantograph system without a first limiting component according to an embodiment of the present invention is shown. Figure 5A partial schematic diagram of a pantograph system with a first limiting component according to an embodiment of the present invention is shown.

[0054] like Figure 1 and Figures 4-5 As shown, the pantograph system also includes a force transmission frame 4. The first end of the force transmission frame 4 is connected to the first connecting portion 21. A second limiting block 32 is disposed on the force transmission frame 4. The pantograph system also includes a lifting airbag 5. The lifting airbag 5 is disposed on the base frame 1. The output end of the lifting airbag 5 is connected to the other end of the force transmission frame 4 to drive the pantograph to rise and fall between a first position and a second position.

[0055] According to this embodiment of the utility model, connecting side plates are welded to the top of the two longitudinal plates of the base frame 1. The connection method between the first end of the force transmission frame 4 and the first connecting part 21 is as follows: two support plates are installed at the first end. The two support plates are symmetrically distributed on both sides of the lower arm body 22 and each has a circular groove. The first connecting part 21 of the lower arm 2 is inserted into the circular groove. Among them, the first limiting block 31 is provided on the side of the connecting side plate near the support plate, and the second limiting block 32 is provided on the side of the support plate near the connecting side plate. The lifting airbag 5 is installed on a horizontal plate of the base frame 1, including but not limited to a rubber airbag cylinder. When the lifting solenoid valve 12 is opened, compressed air enters the lifting airbag 5. The lifting airbag 5 expands due to air pressure and pushes the force transmission frame 4. Furthermore, through the force transmission of the support plate and the first connecting part 21, the lower arm body 22 rotates around the axis and is lifted upward.

[0056] According to an embodiment of the present invention, both the connecting side plate and the support plate are flat plates with polygonal cross-sections. The surfaces of the connecting side plate and the support plate are arranged parallel to each other. The sum of twice the thickness of the bottom plate and the width of the first head plate and the width of the second head plate is greater than the shortest distance between the connecting side plate and the support plate.

[0057] According to the embodiment of this utility model, when the pallet is driven upward by the lifting airbag 5, the second limiting block 32 is driven upward until the top surface of the second head plate and the bottom surface of the first head plate come into contact with each other. The use of planar contact can avoid excessive local stress and also increase the stability when the pantograph is restricted.

[0058] Figure 6 The diagram illustrates the state of the first limiting component on the other side of the base frame when the pantograph is raised according to an embodiment of the present invention. Figure 7 The diagram illustrates the state of the first limiting component on the other side of the base frame when the pantograph is lowered according to an embodiment of the present invention.

[0059] like Figures 3-7As shown, the outer periphery of the first connecting portion 21 has at least two connecting positions arranged circumferentially, and the second limiting block 32 is detachably and selectively connected to one of the connecting positions. The pantograph system also includes at least two sets of first limiting components 3, which are symmetrically arranged on both sides of the lower arm body 22.

[0060] According to an embodiment of this utility model, at least two connection positions can be arranged on the tray. When the second limiting block 32 is selectively connected to one connection position, the specific form can be as follows: the bottom plates of the first limiting block 31 and the second limiting block 32 are both provided with a first reserved hole array, the first reserved hole array including two first reserved holes, the two first reserved holes are arranged in a row along the length direction of the bottom plate and are symmetrically distributed; the connecting side plate is provided with a second reserved hole array, the second reserved hole array including at least two second reserved holes; the tray is provided with a third reserved hole array, the third reserved hole array including at least two... There are three third reserved holes; wherein, two first reserved holes, at least two second reserved holes and at least two third reserved holes are completely aligned, and the first limiting block 31 and the second limiting block 32 are both connected by bolts to the bottom plate. When connected by bolts, the length direction of the first head plate is parallel to the length direction of the second head plate and is parallel to the width direction of the bottom plate. Furthermore, the centerline of the first head plate on the contact surface between the first head plate and the bottom plate coincides with the centerline of the bottom plate, and the centerline of the second head plate on the contact surface between the second head plate and the bottom plate coincides with the centerline of the bottom plate.

[0061] According to this embodiment of the invention, by changing the connection position of the second limiting block 32, the second position reached by the pantograph can be adjusted. Simultaneously, by symmetrically arranging at least two sets of first limiting components 3 on both sides of the lower arm body 22, the reliability of the first limiting components 3 is effectively improved, and the stability during the pantograph raising and limiting process is further enhanced.

[0062] Figure 8 The illustration shows a partial view of a pantograph system with a second limiting component according to an embodiment of the present invention. Figure 9 The diagram illustrates a partial view from another perspective of a pantograph system with a second limiting component according to an embodiment of the present invention. Figure 10 This schematically illustrates a partial view of a pantograph system with a second limiting component according to an embodiment of the present invention. Figure 11 The diagram illustrates a partial view from another perspective of a pantograph system with a second limiting component according to an embodiment of the present invention.

[0063] like Figure 1 and Figures 8-11As shown, the lower arm 2, at the end furthest from the base frame 1, also has a second connecting portion. The pantograph also includes an upper arm 6, which includes a third connecting portion 61 and an upper arm body 62 disposed on the third connecting portion 61. The extension direction of the third connecting portion 61 is parallel to the extension direction of the second connecting portion, and they are pivotally connected via a connector 7. The pantograph system also includes a pull rod 8. One end of the pull rod 8 is pivotally connected to the base frame 1. The upper arm 6 also has a connecting plate 9, which is disposed on the third connecting portion 61 and extends radially outward along the third connecting portion 61. The end of the connecting plate 9 furthest from the third connecting portion 61 is pivotally connected to the other end of the pull rod 8. The pantograph system also includes a second limiting assembly 10. The second limiting assembly 10 includes a third limiting block 101 and a fourth limiting block 102. The third limiting block 101 is disposed on the outer periphery of the second connecting portion. The fourth limiting block 102 is disposed on the connecting plate 9 and faces the third limiting block 101. In the case where the first limiting component 3 fails, the fourth limiting block 102 is configured to abut against the third limiting block 101 so that the pantograph is held in a third position that is higher than the second position and lower than the pantograph raising position.

[0064] According to the embodiments of this utility model, the second connecting part, the third connecting part 61 and the upper arm body 62 are all cylinders, wherein the connection method between the second connecting part and the lower arm body 22 and the connection method between the third connecting part 61 and the upper arm body 62 are including but not limited to integral molding.

[0065] Furthermore, the second connecting part is also provided with a first cylindrical hole that extends axially. The connecting part 7 includes a rotating shaft and two identical side rotating plates. Specifically, the rotating shaft is cylindrical and its axis coincides with the axis of the first cylindrical hole. The diameter of the first cylindrical hole is larger than the diameter of the rotating shaft, and the length of the rotating shaft is greater than the length of the second connecting part. The side rotating plates are flat and their cross-section consists of two semicircles of different diameters and a trapezoid. Both side rotating plates are bolted to the end of the rotating shaft at one end and welded to the end face of the third connecting part 61 of the upper arm 6 at the other end.

[0066] Furthermore, the pull rod 8 can be integrally formed from the pull rod 8 body and the fourth connecting part. There can be at least two connecting plates 9, both plate-shaped with parallel surfaces, and both having a third pre-drilled hole of the same diameter at their ends. Both the pull rod 8 body and the fourth connecting part are cylindrical. The fourth connecting part is located at one end of the pull rod 8 body, and the other end of the pull rod 8 body can be bolted to a horizontal plate of the base frame 1. The diameter of the pull rod 8 body is smaller than the diameter of the lower arm body 22. The fourth connecting part has a second cylindrical hole extending axially, the diameter of which is greater than or equal to the diameter of the third pre-drilled hole. In addition, the connecting plate 9 and the pull rod 8 are connected by a first bolt. Specifically, the first bolt includes a first threaded rod and two first nuts. The diameter of the first threaded rod is set to be smaller than the diameter of the third reserved hole. All the third reserved holes are symmetrically arranged at both ends of the second cylindrical hole. The first threaded rod passes through the second cylindrical hole and all the third reserved holes. The outer surface of the first threaded rod and the inner surface of the two first nuts are threaded. The two first nuts are respectively fitted onto both ends of the first threaded rod.

[0067] According to the embodiment of this utility model, when the lifting airbag 5 drives the lower arm 2 to move away from the base frame 1, the lower arm 2 drives the upper arm 6 to move away from the base frame 1 through the coordinated force transmission of the pull rod 8, the connecting piece 7 and the connecting plate 9. During this process, the stability of the movement of the upper arm 6 when it is raised is enhanced.

[0068] According to an embodiment of the present invention, the pantograph system further includes a second limiting component 10. The second limiting component 10 includes a third limiting block 101 and a fourth limiting block 102. The third limiting block 101 is disposed on the outer periphery of the second connecting portion. The fourth limiting block 102 is disposed on the connecting plate 9 and faces the third limiting block 101. In the state where the first limiting component 3 fails, the fourth limiting block 102 is configured to abut against the third limiting block 101, so that the pantograph is held in a third position, higher than the second position and lower than the pantograph raising position.

[0069] According to an embodiment of this utility model, the third limiting block 101 includes an electrical connection plate 9 and two identical side fixing plates. The electrical connection plate 9 includes a plate body, an extension portion, and two bent portions. The plate body is flat, the extension portion extends from one of the long sides of the plate body to the second connecting portion of the lower arm 2, and each of the two bent portions has one end integrally formed with the two short sides of the plate body. The side fixing plates are flat plates with a polygonal cross-section. Both side fixing plates are welded to the bottom of the lower arm 2 and are symmetrically distributed. The welding length of both side fixing plates is greater than twice the outer diameter of the second connecting portion, and each of the two bent portions is integrally formed with the two side fixing plates at the other end.

[0070] According to an embodiment of the present invention, the fourth limiting block 102 is a flat plate with a polygonal cross-section. Furthermore, at least two identical fourth limiting blocks 102 are respectively connected to the connecting plate 9 by bolts, wherein the fourth limiting blocks 102 and the surface of the connecting plate 9 are arranged parallel to each other.

[0071] According to this embodiment of the invention, when the pantograph is raised, the connecting plate 9 drives the fourth limiting block 102 to approach the second connecting part and the third connecting part 61. When the fourth limiting block 102 reaches the position where it abuts against the plate of the third limiting block 101, the transmission process from the lower arm 2 to the upper arm 6 is restricted. The second limiting component 10 further ensures that the pantograph does not come into contact with the contact wire, effectively improving the operational safety and reliability of the pantograph system.

[0072] Figure 12 A schematic diagram illustrating the communication connection of a pantograph system according to an embodiment of the present invention is shown.

[0073] like Figures 1-12 As shown, the pantograph system also includes a detection component 11. The detection component 11 is disposed on the contact surface of the third limiting block 101 or the fourth limiting block 102, and is adapted to output a detection signal when the third limiting block 101 and the fourth limiting block 102 are in contact. The pantograph system also includes a pantograph lowering component. The pantograph lowering component is communicatively connected to the detection component 11, and is configured to lower the pantograph to a first position when a detection signal is received.

[0074] According to an embodiment of this utility model, the solenoid valve 12 for activating the airbag 5 is disposed in the airbag raising circuit, and the control switch for activating the airbag lowering assembly is connected in series with the airbag raising circuit. The airbag lowering assembly can employ an insulating device; when the control switch is closed, the airbag raising circuit is cut off through insulation, causing the solenoid valve 12 to close. Furthermore, the detection component 11 can be configured to output a detection signal to drive the control switch to close when the received pressure exceeds a set value.

[0075] Furthermore, after the pantograph lifting solenoid valve 12 is closed, the compressed air in the pantograph lifting airbag 5 is discharged through the exhaust pipe. Under the action of gravity, the upper arm 6 and the lower arm 2 move downward relative to the base frame 1 until the pantograph reaches the first position.

[0076] According to this embodiment of the invention, when the first limiting component 3 fails, the pantograph may reach a position higher than the second position after raising. In this case, under the action of the second limiting component 10, the pantograph can still be maintained at a third position lower than the raised position. Simultaneously, when the second limiting component 10 is functioning, by setting a detection component 11 and communicating with the pantograph lowering component, the pantograph can be lowered in a timely manner, effectively preventing the pantograph from exceeding the third position. Through this automatic pantograph lowering process, the problem of the pantograph contacting the overhead contact line due to long-term wear or accidental damage to the first limiting component 3 or the second limiting component 10 can be avoided in a timely manner. This effectively prevents problems such as pantograph scraping or short circuits caused by the pantograph becoming energized during the transition from a contactless to a contactless system. Furthermore, the failure of the first limiting component 3 or the second limiting component 10 can be promptly reported to the instructors for timely repair or replacement.

[0077] This utility model also provides a rail train, including a rail vehicle and the aforementioned pantograph system. The pantograph system is mounted on the roof of the rail vehicle.

[0078] According to an embodiment of the present invention, the upper arm 6 further includes two connecting cranks. Specifically, the two connecting cranks are located at one end of the upper arm body 62 and the third connecting part 61 is located at the other end of the upper arm body 62. The connection method between the two connecting cranks and the upper arm body 62 includes, but is not limited to, integral molding. The cross-section of the connecting crank is circular and the axis is curved. The axes of the two connecting cranks are located in the same horizontal plane and are symmetrical to each other.

[0079] Furthermore, the pantograph also includes a pantograph head. Specifically, the pantograph head includes a first crossbeam, a second crossbeam, a sliding plate, and a spring connecting assembly. The first crossbeam is cylindrical and has two bolt seats on its body. The two bolt seats are respectively connected to the ends of two connecting cranks by bolts. The sliding plate is a rectangular plate and is located on the top surface of the second crossbeam. The second crossbeam is connected to the first crossbeam by the spring connecting assembly. The length directions of the sliding plate, the first crossbeam, and the second crossbeam are all parallel to the length direction of the horizontal plate.

[0080] Furthermore, the sliding plate is located on top of the pantograph. When the pantograph reaches the raising position, the sliding plate can contact the contact wire to introduce current. The material of the sliding plate includes, but is not limited to, metal-impregnated carbon material, pure carbon material, or carbon fiber reinforced resin matrix composite material.

[0081] Furthermore, the distance between the contact wire and the ground can be set to 5300mm. When the upper arm 6 drives the bow head to move upward away from the base frame 1, the maximum height that the slide can reach relative to the ground is 4995mm through the contact between the second limiting block 32 and the first limiting block 31; when the upper arm 6 drives the bow head to move upward away from the base frame 1, under the condition that the second limiting block 32 and the first limiting block 31 are not in contact at all, the maximum height that the slide can reach relative to the ground is 5100mm through the contact between the third limiting block 101 and the fourth limiting block 102.

[0082] According to the embodiments of this utility model, by installing the above-mentioned pantograph system in the rail train, it is beneficial to achieve safe and controllable operation of the rail vehicle during the process of moving from a contactless to a contactless system.

[0083] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A pantograph system, characterized by, include: Pantograph, including: The underframe (1) is installed on the roof of the rail vehicle; The lower arm (2) has a first connecting part (21) and a lower arm body (22) disposed on the first connecting part (21). The lower arm body (22) is pivotally connected to the base frame (1) through the first connecting part (21) so that the lower arm (2) is configured to rotate about the axis of rotation. At least one set of first limiting components (3), the first limiting components (3) comprising: The first limiting block (31) is disposed on the base frame (1) and located on the circumferential outer side of the rotating shaft; The second limiting block (32) is disposed on the first connecting part (21) and swings with the lower arm (2); The pantograph is configured to move up and down between a lower first position and a higher second position, the second position being lower than the pantograph's raised position. When the pantograph is in the second position, the second limiting block (32) abuts against the first limiting block (31) to keep the pantograph in the second position.

2. The pantograph system according to claim 1, characterized in that, Also includes: Force transmission frame (4), the first end of which is connected to the first connecting part (21); The second limiting block (32) is disposed on the force transmission frame (4).

3. The pantograph system according to claim 2, characterized in that, Also includes: The lifting airbag (5) is mounted on the base frame (1); The output end of the pantograph airbag (5) is connected to the other end of the force transmission frame (4) to drive the pantograph to rise and fall between the first position and the second position.

4. The pantograph system according to claim 1, characterized in that, The outer periphery of the first connecting part (21) has at least two connecting positions arranged circumferentially, and the second limiting block (32) is detachably connected to one of the connecting positions.

5. The pantograph system according to claim 1, characterized in that, It includes at least two sets of the first limiting components (3), which are symmetrically arranged on both sides of the lower arm body (22).

6. The pantograph system according to claim 1, characterized in that, The lower arm (2) also has a second connecting part at the end away from the base frame (1); The pantograph also includes an upper arm (6), which includes a third connecting part (61) and an upper arm body (62) disposed on the third connecting part (61). The extension direction of the third connecting part (61) is parallel to the extension direction of the second connecting part, and they are pivotally connected by a connector (7).

7. The pantograph system according to claim 6, characterized in that, Also includes: A pull rod (8), one end of which is pivotally connected to the base frame (1); The upper arm (6) also has a connecting plate (9) disposed on the third connecting part (61) and extending radially outward along the third connecting part (61), and one end of the connecting plate (9) away from the third connecting part (61) is pivotally connected to the other end of the pull rod (8).

8. The pantograph system according to claim 7, characterized in that, Also includes: The second limiting component (10) includes: The third limiting block (101) is disposed on the outer periphery of the second connecting part; The fourth limiting block (102) is disposed on the connecting plate (9) and faces the third limiting block (101); In the case where the first limiting component (3) is ineffective, the fourth limiting block (102) is configured to abut against the third limiting block (101) so that the pantograph is held in a third position that is higher than the second position and lower than the pantograph raising position.

9. The pantograph system according to claim 8, characterized in that, Also includes: The detection component (11) is disposed on the contact surface of the third limiting block (101) or the fourth limiting block (102) and is adapted to output a detection signal when the third limiting block (101) and the fourth limiting block (102) are in contact. The pantograph lowering assembly, which is communicatively connected to the detection assembly (11), is configured to lower the pantograph to the first position when the detection signal is received.

10. A rail train, characterized in that, Includes rail vehicles and pantograph systems as described in any one of claims 1 to 9; The pantograph system is mounted on the roof of the rail vehicle.

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