Rail vehicle axle end grounding device, bogie and rail vehicle

Abstract

The present invention relates to a rail vehicle axle-end grounding device, a bogie, and a rail vehicle, belonging to the technical field of rail vehicles. The rail vehicle axle-end grounding device comprises: a friction disc and a grounding body; wherein one end of the friction disc is mounted on the bogie axle end, fixedly connected to the bogie axle end, and rotates with the wheel axle; the grounding body is used to conduct current to the friction disc, and includes: a brush holder disposed above the friction disc, forming a plurality of first spaces therein; an end cap fitted into the center of the brush holder, forming a second space with the brush holder; a carbon brush mounted in the first space, one end in sliding contact with the friction disc and the other end connected to a carbon brush wire located in the second space; a wire connection device on the carbon brush wire securely mounts the carbon brush to the end cap via a first fastening device; and a spring located in the second space, fixedly connected to the end cap, and in contact with the carbon brush, for compressing the carbon brush and providing support for the carbon brush to move up and down. The rail vehicle axle-end grounding device simplifies the mechanical structure, improves the safety and reliability of the product, and makes the product structure more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a rail vehicle axle end grounding device, a bogie and a rail vehicle. Background Art

[0002] The grounding device is a critical electrical component required for the safe operation of rail vehicles. Its function is to direct vehicle current, or leakage current from faulty electrical equipment, through the grounding device to the axle, ensuring personnel safety and reducing electrical corrosion damage to the vehicle's main bearings. Typically, the grounding device is mounted on the axlebox cover, where it makes sliding contact with the friction disc mounted on the axle to conduct electricity.

[0003] In the existing technology, axle-end grounding devices for trains generally use independent spring assemblies and conductive components for fixing body cables to respectively realize the conductive and spring installation functions, and use two components to realize structural support and insulation functions respectively. As a result, the internal structure of the grounding device is relatively complex and the product structure is not compact, which may cause failures caused by multiple components.

[0004] Therefore, how to provide a shaft-end grounding device that can do subtraction from the design source, reduce components as much as possible, and achieve structural simplification is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] In view of the shortcomings existing in the related art, the purpose of the present invention is to provide a rail vehicle axle end grounding device, a bogie and a rail vehicle, so as to solve the technical problem of the existing technology of how to provide a shaft end grounding device that can do subtraction from the design source, reduce components as much as possible, and simplify the structure.

[0006] The present invention provides a rail vehicle axle end grounding device, comprising:

[0007] A friction disc, one end of which is mounted on the bogie axle end, is fixedly connected to the bogie axle end and rotates with the wheel axle;

[0008] A grounding body, used for conducting current to the friction disk, comprising:

[0009] a brush holder, which is arranged above the friction disc, and has a plurality of first spaces formed inside the brush holder;

[0010] An end cover is sleeved on the center of the brush holder to form a second space with the brush holder;

[0011] a carbon brush, which is installed in the first space, one end of which is in sliding contact with the friction disk, and the other end of which is connected to a carbon brush wire, the carbon brush wire being located in the second space, and a wire connecting device on the carbon brush wire fixing the carbon brush to the end cap via a first fastening device;

[0012] A spring is located in the second space, fixedly connected to the end cover, and contacts the carbon brush to compress the carbon brush and provide support for the carbon brush to move up and down.

[0013] This technical solution integrates the conductive and spring installation functions into one through the end cover, simplifying the conductive components and independent spring components (including brackets) originally used for fixing the vehicle body cables into one component, and also eliminating the spring bracket and brush holder fixing structure, reducing components and saving equipment space.

[0014] In some embodiments of the present invention, the brush holder is made of insulating material and has a two-layer table-top structure; the end cap is made of metal and is T-shaped with a circular ring at the top. This technical solution integrates structural support and insulation functions through the brush holder, ensuring reliable insulation between the grounding device and the axle box. This reduces design complexity, improves product safety and reliability, and reduces potential failures caused by multiple components.

[0015] In some embodiments of the present invention, the carbon brush is rectangular, the first space provides a movable guide groove for the carbon brush and spring, and the second space provides movement space for the carbon brush wire. The brush holder designed with this technical solution provides installation space for the carbon brush, and the wire movement space is designed in the end cap and the brush holder cavity, thus minimizing the height space of the product and achieving a more compact product structure.

[0016] In some embodiments of the present invention, a grounding wire installation and fixing point is designed in the middle of the end cover. The grounding wire installation and fixing point can be used to fix the grounding wire on the end cover to ensure that the vehicle body current can be conducted to the end cover through the grounding wire.

[0017] In some embodiments of the present invention, the inner ring of the end cap is designed with several mounting points for the springs, and the outer ring is designed with several mounting points for the carbon brush wires. This technical solution provides an end cap that directly secures the springs and carbon brushes to the end cap via these mounting points, simplifying the mechanical structure.

[0018] In some embodiments of the present invention, the sealing gasket utilizes a sandwich structure of metal foam panels, flanked by rubber foam panels for improved sealing performance and a stainless steel plate in the middle for increased gasket strength. In this technical solution, the rubber foam panels on both sides of the gasket compress significantly, ensuring good sealing performance, while the stainless steel plate in the middle limits compression and enhances gasket strength.

[0019] In some embodiments of the present invention, second fastening device fixing points are provided at corresponding positions on the brush holder and the sealing gasket, and the brush holder and the sealing gasket are mounted on the axle box via the second fastening device. In this technical solution, the fastening device fixing points provided at corresponding positions on the brush holder and the sealing gasket can secure the brush holder and the sealing gasket to the axle box.

[0020] In some embodiments of the present invention, a third space is formed between the brush holder and the friction disc outside the carbon brush to store carbon powder. In this technical solution, the third space between the brush holder and the friction disc can store carbon powder generated by friction between the carbon brush and the friction disc.

[0021] The present invention also provides a bogie comprising an axle, wherein the axle end of the axle is provided with the above-mentioned rail vehicle axle end grounding device.

[0022] In addition, the present invention also provides a rail vehicle, characterized in that it includes the above-mentioned bogie.

[0023] Based on the above scheme, the rail vehicle axle end grounding device, bogie and rail vehicle in the embodiments of the present invention integrate the conductive and spring installation functions into one through the end cover, simplifying the conductive components and independent spring components (including brackets) originally used for fixing the car body cables into one component, and directly fixing the spring and carbon brush to the end cover, thereby simplifying the mechanical structure; the brush holder is made of insulating material, integrating structural support and insulation functions, and making subtraction in design, thereby improving the safety and reliability of the product and reducing possible failures caused by multiple components; the movement space of the carbon brush wire is designed in the inner cavity of the end cover and the brush holder, thereby maximizing the compression of the product height space and making the product structure more compact; the sealing gasket adopts a sandwich structure metal foam board, and the rubber foam boards on both sides have a large compression amount to ensure good sealing performance, and the middle stainless steel plate limits the compression amount to improve the gasket strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a sectional view of the three-dimensional structure of the rail vehicle axle end grounding device of the present invention;

[0026] Figure 2 It is a top view of the rail vehicle axle end grounding device of the present invention.

[0027] In the picture:

[0028] 1. Friction disc; 2. Brush holder; 3. End cover; 4. Carbon brush; 5. Carbon brush wire; 6. Spring; 7. Sealing gasket; 8. Wire clamp; 9. Fixing point for grounding wire; 10. Installation and fixing point for spring; 11. Installation and fixing point for carbon brush wire; 12. Fixing point for second fastening device; 13. First space; 14. Second space; 15. Third space. DETAILED DESCRIPTION

[0029] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] like Figure 1-Figure 2As shown, in one embodiment of the rail vehicle axle end grounding device of the present invention, the rail vehicle axle end grounding device includes a friction disk and a grounding body; wherein, one end of the friction disk is installed on the bogie axle end, fixedly connected to the bogie axle end and rotates with the wheel axle; the grounding body is used to conduct current to the friction disk, including: a brush holder is arranged above the friction disk, and a plurality of first spaces are formed inside the brush holder; an end cover is sleeved on the center of the brush holder, and forms a second space with the brush holder; a carbon brush is correspondingly installed in the first space, one end is in sliding contact with the friction disk, and the other end is connected to the carbon brush wire, the carbon brush wire is located in the second space, and the wire connection device on the carbon brush wire fixes the carbon brush to the end cover through a first fastening device; a spring is located in the second space, fixedly connected to the end cover, and is in contact with the carbon brush, and is used to press the carbon brush and provide support for the carbon brush to move up and down.

[0034] In the above-mentioned exemplary embodiment, the rail vehicle axle-end grounding device integrates the conductive and spring installation functions through the end cover, simplifies the conductive components and independent spring components (including brackets) originally used for fixing the vehicle body cables into one component, and also eliminates the spring bracket and brush holder fixing structure, thereby reducing components and saving equipment space.

[0035] It should be noted that, in this embodiment, the spring is a constant force spring, which is fixed to the end cover by rivets.

[0036] It should be noted that, in this embodiment, the carbon brush is mounted on the end cover via a bolt through the connection terminal on the carbon brush wire.

[0037] In some embodiments, as Figure 1 As shown, the brush holder is made of insulating material and features a two-tiered, table-like structure. The metal end cap is T-shaped and topped with a circular ring. The brush holder provides insulation for the carbon brush's movable guide grooves. Combining structural support and insulation, the brush holder ensures reliable insulation between the grounding device and the axle box. This minimalist design improves product safety and reliability, reducing potential failures caused by multiple components.

[0038] It should be noted that, in this embodiment, the brush holder is made of sheet molding compound (SMC), but the present invention is not limited thereto.

[0039] It should be noted that the brush holder may also be made of metal, and a sheet molding compound (SMC) insulating plate may be added to insulate the grounding device from the axle box, but the present invention is not limited thereto.

[0040] In some embodiments, as Figure 1 As shown, the carbon brush is rectangular. The first space provides a movable guide groove for the carbon brush and spring, and the second space provides movement space for the carbon brush wire. The wire movement space is designed in the end cap and the brush holder cavity to minimize the height space of the product and make the product structure more compact.

[0041] It should be noted that, in this embodiment, the rail vehicle axle end grounding device is provided with 3 springs and 3 carbon brushes respectively, and the carbon brushes are respectively installed in the first space reserved for installing the carbon brushes in the brush holder, and each carbon brush is connected to two carbon brush wires.

[0042] It should be further explained that, in this embodiment, the carbon brush is a rectangular parallelepiped with a width of 12.5 cm, a length of 32 cm, and a height of 50 cm, but the present invention is not limited thereto.

[0043] In some embodiments, as Figure 1 or Figure 2 As shown, a grounding wire installation and fixing point is designed in the middle of the end cover. The grounding wire installation and fixing point can be used to fix the grounding wire on the end cover to ensure that current is conducted to the end cover.

[0044] In some embodiments, as Figure 1 As shown, the inner ring of the end cover is designed with several installation and fixing points for the springs, and the inner outer ring is designed with several installation and fixing points for the carbon brush wires. The springs and carbon brushes are directly fixed to the end cover through the installation and fixing points of the springs and the carbon brush wires, which simplifies the mechanical structure.

[0045] It should be noted that, in this embodiment, the inner ring of the end cover is designed with three spring mounting and fixing points, and the inner outer ring is designed with three carbon brush wire mounting and fixing points, but the present invention is not limited thereto.

[0046] In some embodiments, as Figure 1 or Figure 2 As shown, the sealing gasket adopts a sandwich structure metal foam plate, with rubber foam plates on both sides for improving sealing performance, and a stainless steel plate in the middle for improving gasket strength. The rubber foam plates on both sides have a large compression amount to ensure good sealing performance, and the stainless steel plate in the middle improves gasket strength.

[0047] It should be noted that, in this embodiment, the sealing gasket may also be made of an asbestos-free pad or a rubber plate, but the present invention is not limited thereto.

[0048] In some embodiments, as Figure 1 or Figure 2 As shown, a second fastening device fixing point is provided at the corresponding position of the brush holder and the sealing gasket, and the brush holder and the sealing gasket are installed on the axle box through the second fastening device. The fastening device fixing points provided at the corresponding positions on the brush holder and the sealing gasket can fix the brush holder and the sealing gasket on the axle box.

[0049] It should be noted that, in this embodiment, four threaded holes are respectively provided at corresponding positions of the brush holder and the sealing gasket, and the brush holder and the sealing gasket are mounted on the axle box by bolts, but the present invention is not limited thereto.

[0050] In some embodiments, as Figure 1 As shown, a third space is formed between the brush holder outside the carbon brush and the friction disk for storing carbon powder. The third space set between the brush holder and the friction disk can store the carbon powder generated by the friction between the carbon brush and the friction disk.

[0051] It should be noted that if Figure 1 or Figure 2 As shown, the grounding body also includes a wire clamp for fixing the grounding wire. By setting the wire clamp to fix the grounding wire, it is possible to ensure that the vehicle body current grounding wire is introduced into the end cover.

[0052] Based on the above-mentioned rail vehicle axle end grounding device, the present invention further provides a bogie, which includes an axle, and the axle end of the axle is provided with the above-mentioned rail vehicle axle end grounding device.

[0053] In addition, the present invention also provides a rail vehicle, which includes the above-mentioned bogie.

[0054] Depending on the product's operating state, the vehicle body current is introduced through a grounding wire into the end cap (including a spring). The grounding wire is secured to the grounding device with a wire clamp. The vehicle body current then flows through the end cap to the carbon brush wire connected to the end cap. The carbon brush wire conducts the current to the friction disc, then through the axle and rail to the return line. A sealing gasket seals the connection between the grounding device and the axle box, ensuring a sealing performance that meets IP66 standards.

[0055] The rail vehicle shaft end grounding devices described in the aforementioned embodiments can reduce component count and simplify mechanical structure, while also improving product safety and reliability and ensuring effective sealing. The other positive technical benefits of the rail vehicle shaft end grounding devices described in the aforementioned embodiments are also applicable to bogies and rail vehicles and will not be further elaborated here.

[0056] Through the description of multiple embodiments of the rail vehicle shaft end grounding device of the present invention, it can be seen that the rail vehicle shaft end grounding device of the present invention has at least one or more of the following advantages:

[0057] 1. The spring and carbon brush are fixed to the end cover. The end cover integrates the conductive and spring mounting functions to simplify the mechanical structure.

[0058] 2. The brush holder integrates structural support and insulation functions, and makes subtraction in design, which improves the safety and reliability of the product and reduces the possible failures caused by multiple components.

[0059] 3. Design the wire movement space in the end cover and the brush holder cavity to compress the product height space to the maximum extent and make the product structure more compact.

[0060] 4. The sealing gasket is a sandwich structure metal foam board. The rubber foam boards on both sides have a large compression volume to ensure good sealing performance. The stainless steel plate in the middle limits the compression volume to improve the strength of the gasket.

[0061] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A rail vehicle axle end grounding device, arranged at the axle end of a bogie with an axle box, characterized in that: include: A friction disc, one end of which is mounted on the bogie axle end, is fixedly connected to the bogie axle end and rotates with the wheel axle; A grounding body, used for conducting current to the friction disk, comprising: a brush holder, which is arranged above the friction disc, and has a plurality of first spaces formed inside the brush holder; An end cover is sleeved on the center of the brush holder to form a second space with the brush holder; a carbon brush installed in the first space, one end of which is in sliding contact with the friction disc, and the other end of which is connected to a carbon brush wire, the carbon brush wire being located in the second space, and a wire connecting device on the carbon brush wire fixing the carbon brush to the end cap via a first fastening device; A spring is located in the second space, fixedly connected to the end cover, and contacts the carbon brush to compress the carbon brush and provide support for the carbon brush to move up and down.

2. The rail vehicle shaft end grounding device according to claim 1, characterized in that: The brush holder is made of insulating material and has a two-layer table structure; the end cover is made of metal and is T-shaped, with a circular ring on the top.

3. The rail vehicle shaft end grounding device according to claim 1, characterized in that: The carbon brush is in a rectangular parallelepiped shape, the first space provides a movable guide groove for the carbon brush and the spring, and the second space provides a movement space for the carbon brush wire.

4. The rail vehicle axle end grounding device according to claim 1, characterized in that , an installation and fixing point for the grounding wire is designed in the middle of the outer side of the end cover.

5. The rail vehicle shaft end grounding device according to claim 1, characterized in that: The inner ring of the end cover is designed with several installation and fixing points for the spring, and the inner outer ring is designed with several installation and fixing points for the carbon brush wire.

6. The rail vehicle shaft end grounding device according to claim 1, characterized in that: The grounding body also includes a sealing gasket, which is arranged between the outer side of the brush holder and the axle box. The sealing gasket adopts a sandwich structure metal foam plate, with rubber foam plates on both sides for improving sealing performance and a stainless steel plate in the middle for improving gasket strength.

7. The rail vehicle shaft end grounding device according to claim 6, characterized in that: A second fastening device fixing point is provided at corresponding positions of the brush holder and the sealing gasket, and the brush holder and the sealing gasket are installed on the axle box through the second fastening device.

8. The rail vehicle shaft end grounding device according to claim 1, characterized in that: A third space is formed between the brush holder outside the carbon brush and the friction disc for storing carbon powder.

9. A bogie, characterized in that: The invention comprises an axle, the shaft end of which is provided with the rail vehicle shaft end grounding device according to any one of claims 1 to 8.

10. A rail vehicle, characterized in that: Comprising a bogie as claimed in claim 9.

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