Railway vehicle and grounding device thereof

Abstract

The utility model discloses a rail vehicle and a grounding device thereof, and relates to the technical field of rail traffic, and the grounding device comprises a shell, a carbon brush, a movable seat, a diversion wire, a brush holder, an end cover and a driving assembly. The end cover is fixedly installed on an axle of the railway vehicle, the brush holder is fixedly installed on the end cover, the movable seat is movably arranged in the brush holder and connected with the brush holder through a flow guide line, the shell is connected with a wheel, the carbon brush is arranged between the shell and the movable seat and is of a spherical structure, and the shell is provided with a first ball seat matched with the carbon brush. The movable seat is provided with a second ball seat matched with the carbon brush, the movable seat is used for abutting against the carbon brush so that the carbon brush can make contact with and abut against the first ball seat and the second ball seat all the time, and the driving assembly is used for applying acting force to the movable seat so that the movable seat can tend to move close to the carbon brush. In the grounding device, the shell, the carbon brush and the movable seat are in rolling friction with one another, so that the abrasion loss of friction pairs such as the carbon brush can be greatly reduced, and the maintenance period and the service life of the grounding device are prolonged.

Description

Technical Field

[0001] The present application relates to the field of rail transportation technology, and in particular to a grounding device. The present application also relates to a rail vehicle having the grounding device. Background Art

[0002] The main carbon brush part of the grounding device of traditional urban rail and locomotive vehicles is installed on the outer end cover of the bogie axle box, and the friction plate is installed on the end of the axle. The axle and the wheel rotate together, and the vehicle grounding return current is realized through the power grid-grounding device carbon brush-friction plate-wheel axle-rail.

[0003] In the existing system, the tram operation process is mainly powered by the on-board power supply device. The ground power supply device is set in the temporary parking area of ​​the road to supply power to the on-board power supply device and the tram. The axle bridge and the wheel are connected by bearings, and the axle bridge does not rotate with the wheel. One end of the grounding device is installed on the end cover of the bogie axle bridge, and the other end is installed on the wheel. Its function is to realize the grounding return from the power supply device to the tram and then to the rail when the tram is charged, so as to ensure the reliability of the vehicle charging process. The traction motor and gearbox of the four-module tram are located on the outside of the bogie wheelset. The grounding device is installed at the end of the shaft and located in the coupling inside the gearbox. Since the grounding device is located inside other equipment and is limited by the overall structure, ordinary tools cannot access the grounding device, and the entire grounding device cannot be disassembled during the vehicle frame repair period. At present, the wear of the existing structural carbon brush needs to be regularly inspected and replaced, and it cannot be used until the frame repair. Therefore, according to the special structure of the four-module tram, it is necessary to design a grounding device that does not need to be disassembled during the frame repair, has low wear and long life. Utility Model Content

[0004] The purpose of the present application is to provide a grounding device with low wear and long service life, and no need to be disassembled for maintenance during overhaul. Another purpose of the present application is to provide a rail vehicle including the grounding device.

[0005] To achieve the above-mentioned purpose, the present application provides a grounding device for a rail vehicle to realize ground return of the rail vehicle, comprising:

[0006] End cover, used for fixed installation on the axle bridge of the rail vehicle;

[0007] Brush holder, fixedly mounted on the end cover;

[0008] Carbon brush, the carbon brush is a spherical structure;

[0009] A housing is used to connect with a wheel of a rail vehicle and rotate with the wheel, and the housing is provided with a first ball seat matched with a carbon brush;

[0010] The movable seat is movably arranged in the brush holder and connected to the brush holder through the guide wire. The movable seat is provided with a second ball seat matched with the carbon brush. The movable seat is used to press the carbon brush so that the carbon brush contacts and abuts against the first ball seat and the second ball seat.

[0011] The driving assembly is used for applying a force to the movable seat so that the movable seat has a tendency to move close to the carbon brush.

[0012] In some embodiments, the driving component is an elastic component, which is connected to the movable seat and abuts against the brush holder. The elastic component is used to provide elastic force to the movable seat so that the movable seat has a tendency to move close to the carbon brush.

[0013] In some embodiments, a stopper is provided inside the brush holder, and the elastic component abuts against the stopper.

[0014] In some embodiments, the elastic component includes two coil springs, and the two coil springs are respectively connected to the outer walls on both sides of the movable seat.

[0015] In some embodiments, the driving assembly includes a first magnet disposed on the housing and a second magnet disposed on the movable seat. The second magnet and the first magnet can generate a magnetic attraction force to make the carbon brush contact and resist the first ball seat and the second ball seat.

[0016] In some embodiments, the brush holder is provided with a guide groove, and the movable seat can be movably disposed in the guide groove.

[0017] In some embodiments, the brush holder is further provided with a wear-resistant layer located within the guide groove.

[0018] In some embodiments, at least two layers of spaced-apart protrusion structures are disposed in the housing.

[0019] In some embodiments, two ends of the guide wire are respectively connected to the brush holder, and the middle part of the guide wire is connected to the movable seat.

[0020] The present application also provides a rail vehicle, comprising any of the grounding devices described above.

[0021] Compared with the above background technology, the grounding device provided in the embodiment of the present application is used for rail vehicles to realize the grounding return of rail vehicles. The grounding device includes a shell, a carbon brush, a movable seat, a guide wire, a brush holder, an end cover and a drive assembly. Among them, the end cover is used to be fixedly installed on the axle bridge of the rail vehicle, the brush holder is fixedly installed on the end cover, the movable seat can be movably arranged in the brush holder, the movable seat is connected to the brush holder through the guide wire, the shell is used to be connected to the wheel and rotate with the wheel, the carbon brush is arranged between the shell and the movable seat, at the same time, the carbon brush is a spherical structure, the shell is provided with a first ball seat that cooperates with the carbon brush, the movable seat is provided with a second ball seat that cooperates with the carbon brush, and the drive assembly is used to apply a force to the movable seat so that the movable seat has a tendency to move close to the carbon brush, so that the movable seat can always press the carbon brush so that the carbon brush is always in contact with the first ball seat and the second ball seat. It can be seen that the grounding device provided in the embodiment of the present application is applied to a rail vehicle. When the rail vehicle is charged, the current passes through the axle bridge-end cover-brush holder-guide wire-movable seat-carbon brush-housing-wheel to realize the grounding return function of the rail vehicle; when the rail vehicle is running, the housing rotates with the wheel, and the housing, carbon brush and movable seat have rolling friction with each other, which can greatly reduce the wear of friction pairs such as carbon brushes, extend the maintenance cycle and service life of the grounding device, and thus there is no need to disassemble and repair the grounding device during the frame maintenance period, reducing the workload and maintenance costs of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the external structure of the grounding device in the embodiment of the present application;

[0024] Figure 2 A cross-sectional view of a first grounding device in an embodiment of the present application;

[0025] Figure 3 A cross-sectional view of a second grounding device in an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the assembly of the first grounding device in the embodiment of the present application;

[0027] Figure 5 for Figure 2 A cross-sectional view of the housing in the first grounding device shown;

[0028] Figure 6 for Figure 2A schematic diagram of the connection between the movable seat and the coil spring in the first grounding device shown;

[0029] Figure 7 for Figure 2 A cross-sectional view of the movable seat in the first grounding device shown;

[0030] Figure 8 for Figure 2 A schematic diagram of the structure of a brush holder in the first grounding device shown;

[0031] Fig. 9 for Figure 8 a top view of the brush holder shown;

[0032] Fig.10 for Fig. 9 Sectional view of AA in the middle;

[0033] Fig.11 for Fig. 9 Cross-sectional view of BB.

[0034] in:

[0035] 1-housing, 101-first ball seat, 102-protruding structure;

[0036] 2-Carbon brush;

[0037] 3- movable seat, 301- second ball seat;

[0038] 4- flow guide line;

[0039] 5-brush holder, 501-stopper, 502-guide groove;

[0040] 6-end cap;

[0041] 7- Elastic component;

[0042] 8- a first magnet;

[0043] 9- second magnet;

[0044] 10-axle bridge;

[0045] 11-Wheels. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0049] Please refer to Figures 1 to 11 , Figure 1 This is a schematic diagram of the external structure of the grounding device in the embodiment of the present application; Figure 2 A cross-sectional view of a first grounding device in an embodiment of the present application; Figure 3 A cross-sectional view of a second grounding device in an embodiment of the present application; Figure 4 This is a schematic diagram of the assembly of the first grounding device in the embodiment of the present application; Figure 5 for Figure 2 A cross-sectional view of the housing in the first grounding device shown; Figure 6 for Figure 2 A schematic diagram of the connection between the movable seat and the coil spring in the first grounding device shown; Figure 7 for Figure 2 A cross-sectional view of the movable seat in the first grounding device shown; Figure 8 for Figure 2 A schematic diagram of the structure of a brush holder in the first grounding device shown; Fig. 9 for Figure 8 a top view of the brush holder shown; Fig.10 for Fig. 9 Sectional view of AA in the middle; Fig.11 for Fig. 9 Cross-sectional view of BB.

[0050] The grounding device provided in the embodiment of the present application is used in a rail vehicle to realize ground return of the rail vehicle. The rail vehicle may be a tram, such as a four-module tram.

[0051] The grounding device comprises a housing 1, a carbon brush 2, a movable seat 3, a guide wire 4, a brush holder 5, an end cover 6 and a driving assembly.

[0052] Among them, the end cover 6 is used to be fixedly installed on the axle bridge 10 of the rail vehicle, the brush holder 5 is fixedly installed on the end cover 6, the movable seat 3 can be movably arranged in the brush holder 5, the movable seat 3 is connected to the brush holder 5 through the guide line 4, the outer shell 1 is used to be connected to the wheel 11 of the rail vehicle and rotate with the wheel 11, the carbon brush 2 is arranged between the outer shell 1 and the movable seat 3, at the same time, the carbon brush 2 is a spherical structure, the outer shell 1 is provided with a first ball seat 101 that cooperates with the carbon brush 2, and the movable seat 3 is provided with a second ball seat 301 that cooperates with the carbon brush 2, and the driving assembly is used to apply a force to the movable seat 3 so that the movable seat 3 has a tendency to move close to the carbon brush 2. In this way, the movable seat 3 can always press the carbon brush 2 so that the carbon brush 2 is always in contact with the first ball seat 101 and the second ball seat 301.

[0053] It should be noted that in the prior art, the carbon brush 2 of the grounding device is designed to be a carbon brush 2 with a braided wire, the braided wire of the carbon brush 2 is fixedly installed on the brush holder 5, and the carbon brush 2 itself is formed by powder pressing. In actual use, the carbon brush 2 and the braided wire are often separated, resulting in poor flow guidance. The embodiment of the present application sets the carbon brush 2 as a spherical structure, which can well solve the above problem.

[0054] In addition, the spherical carbon brush 2 is designed as a copper sphere, and many small holes are opened on the surface of the copper sphere, and many carbon rods are filled in the small holes, which can meet the conductivity and improve the wear resistance.

[0055] It can be seen that the grounding device provided in the embodiment of the present application is applied to a rail vehicle. When the rail vehicle is charged, the current passes through the axle bridge 10-end cover 6-brush holder 5-guide wire 4-movable seat 3-carbon brush 2-housing 1-wheel 11 to realize the grounding return function of the rail vehicle; when the rail vehicle is running, the housing 1 rotates with the wheel 11, and the housing 1, carbon brush 2 and movable seat 3 have rolling friction with each other, which can greatly reduce the wear of friction pairs such as the carbon brush 2, extend the maintenance cycle and service life of the grounding device, and thus there is no need to disassemble and repair the grounding device during the frame maintenance period, reducing the workload and maintenance costs of the staff.

[0056] It should be noted that the material of the shell 1 is a metal material with low resistivity, preferably aluminum alloy; the material of the carbon brush 2 is metal graphite, and the exterior of the carbon brush 2 can also be copper-plated or tin-plated; the movable seat 3 is made of copper alloy, and the copper alloy is preferably wear-resistant material tin bronze or aluminum bronze.

[0057] In this embodiment, in order to ensure that the carbon brush 2 is always in contact with and against the first ball seat 101 of the housing 1 and the second ball seat 301 of the movable seat 3, a driving component is further provided, which can provide a force to the movable seat 3 so that the movable seat 3 always has a tendency to move close to the carbon brush 2, thereby ensuring that the carbon brush 2 can always maintain a rolling friction contact state with the first ball seat 101 and the second ball seat 301.

[0058] In some embodiments, the driving component may be an elastic component 7 , which is connected to the movable seat 3 and abuts against the brush holder 5 . The elastic component 7 is used to provide elastic force to the movable seat 3 so that the movable seat 3 tends to move closer to the carbon brush 2 .

[0059] In order to facilitate the installation of the elastic component 7, a stopper 501 is provided inside the brush holder 5, and the elastic component 7 abuts against the stopper 501. In addition, the function of the stopper 501 also includes preventing the movable seat 3 from being separated from the brush holder 5 under the elastic force of the elastic component 7.

[0060] Specifically, the elastic component 7 includes two coil springs, and the two coil springs are respectively connected to the outer walls on both sides of the movable seat 3. The two coil springs can be fixedly connected to the movable seat 3, and can also be set as an integrated structure with the movable seat 3.

[0061] As a result, when the coil spring is in a stretched state, the coil spring has a tendency to contract, thereby providing pressure to the movable seat 3 so that the movable seat 3 has a tendency to move close to the carbon brush 2 .

[0062] It should be noted that during installation, the coil spring is in a stretched state, that is, the initial state of the coil spring is a stretched state, so that the coil spring can always provide pressure to the movable seat 3, and even if the carbon brush 2 is worn, it can ensure that the carbon brush 2 can always maintain a rolling friction contact state with the first ball seat 101 and the second ball seat 301.

[0063] In this embodiment, the elastic force of the coil spring is preferably between 20N and 30N.

[0064] In some embodiments, the driving component can be a magnetic component. For example, the magnetic component includes a first magnet 8 provided on the housing 1 and a second magnet 9 provided on the movable seat 3. The second magnet 9 and the first magnet 8 can generate a magnetic attraction force to make the carbon brush 2 contact and resist the first ball seat 101 and the second ball seat 301.

[0065] It can be seen that the end face of the first magnet is flush with the end face of the first ball seat 101 close to the movable seat 3, and the end face of the second magnet 9 is flush with the end face of the second ball seat 301 close to the first ball seat 101. The distance between the two magnets can maintain magnetic attraction between the two, so that the carbon brush 2 always has a tendency to move close to the first ball seat 101.

[0066] Of course, according to actual needs, the second magnet 9 and the first magnet 8 can be electromagnets or permanent magnets, so that the magnetic field generated by the conductive current can strengthen the magnetic force but cannot offset the magnetic force of the magnets.

[0067] In order to facilitate the guidance of the movement of the movable seat 3 , the brush holder 5 is provided with a guide groove 502 , and the movable seat 3 can be movably arranged in the guide groove 502 .

[0068] For example, two oppositely arranged guide grooves 502 can be set inside the brush holder 5, and the two guide grooves 502 extend along the axial direction of the brush holder 5. Correspondingly, guide structures are provided on both sides of the movable seat 3, and the two guide structures can be slidably connected to the two guide grooves 502 respectively. In this way, the movable seat 3 can be movably installed in the guide groove 502 of the brush holder 5, thereby realizing directional movement in the guide groove 502 of the brush holder 5.

[0069] In some embodiments, the brush holder 5 is further provided with a wear-resistant layer located in the guide groove 502 .

[0070] Specifically, a wear-resistant layer or a wear-resistant material may be welded or bonded in the guide groove 502 of the brush holder 5 , thereby preventing damage to the brush holder 5 and increasing the service life of the brush holder 5 .

[0071] In some embodiments, at least two layers of spaced-apart protrusion structures 102 are disposed in the housing 1 .

[0072] Optionally, two layers of raised structures 102 are provided inside the housing 1. The purposes of such provision are: first, to prevent the coil spring from affecting other components after failure; second, to prevent carbon powder generated after wear from entering the external bearing.

[0073] In some embodiments, both ends of the guide wire 4 are connected to the brush holder 5 by bolts, and the middle part of the guide wire 4 is connected to the movable seat 3 by bolts.

[0074] The grounding device provided in the embodiment of the present application is applied to a rail vehicle. When the rail vehicle is charged, the current passes through the axle bridge 10-end cover 6-brush holder 5-guide wire 4-movable seat 3-carbon brush 2-housing 1-wheel 11 to realize the grounding return function of the rail vehicle; when the rail vehicle is running, the housing 1 rotates with the wheel 11, and the housing 1, carbon brush 2 and movable seat 3 have rolling friction with each other, which can greatly reduce the wear of friction pairs such as the carbon brush 2, extend the maintenance cycle and service life of the grounding device, and thus do not need to disassemble and repair the grounding device during the frame repair period, reducing the workload and maintenance costs of the staff.

[0075] The present application provides a rail vehicle, including the grounding device described in the above specific embodiment; other parts of the rail vehicle can refer to the prior art and will not be elaborated in this article.

[0076] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0077] The rail vehicle and its grounding device provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the scheme and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A grounding device for a rail vehicle to realize ground return of the rail vehicle, characterized in that: include: An end cover, used for fixed installation on the axle bridge of the rail vehicle; A brush holder is fixedly mounted on the end cover; A carbon brush, wherein the carbon brush is a spherical structure; A housing, used to be connected to a wheel of the rail vehicle and rotate with the wheel, the housing being provided with a first ball seat matched with the carbon brush; A movable seat is movably disposed in the brush holder and connected to the brush holder through a guide line. The movable seat is provided with a second ball seat that matches the carbon brush. The movable seat is used to press the carbon brush so that the carbon brush contacts and abuts against the first ball seat and the second ball seat. The driving assembly is used to apply a force to the movable seat so that the movable seat has a tendency to move close to the carbon brush.

2. The grounding device according to claim 1, characterized in that: The driving component is an elastic component, which is connected to the movable seat and abuts against the brush holder. The elastic component is used to provide elastic force to the movable seat so that the movable seat has a tendency to move close to the carbon brush.

3. The grounding device according to claim 2, characterized in that: A stopper is provided inside the brush holder, and the elastic component abuts against the stopper.

4. The grounding device according to claim 2, characterized in that: The elastic component includes two coil springs, and the two coil springs are respectively connected to the outer walls on both sides of the movable seat.

5. The grounding device according to claim 1, characterized in that: The driving assembly includes a first magnet disposed on the housing and a second magnet disposed on the movable seat. The second magnet and the first magnet can generate a magnetic attraction force to make the carbon brush contact and abut against the first ball seat and the second ball seat.

6. The grounding device according to claim 1, characterized in that: The brush holder is provided with a guide groove, and the movable seat can be movably arranged in the guide groove.

7. The grounding device according to claim 6, characterized in that: The brush holder is also provided with a wear-resistant layer located in the guide groove.

8. The grounding device according to claim 1, characterized in that: At least two layers of spaced-apart convex structures are arranged in the shell.

9. The grounding device according to claim 1, characterized in that: The two ends of the guide wire are respectively connected to the brush holder, and the middle part of the guide wire is connected to the movable seat.

10. A rail vehicle, characterized in that: Comprising a grounding device as described in any one of claims 1-9.

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