Bogie grounding device

Abstract

The utility model discloses a bogie grounding device, which relates to the technical field of railway vehicle bogies and comprises an axle, wheels and a grounding device. The power assembly is in transmission connection with the axle; the grounding ring assembly is in transmission connection with the axle, and the grounding ring assembly comprises a first grounding ring and a second grounding ring which are spliced together; and the axle box is rotatably connected with the axle, the grounding device body is integrally arranged on the peripheral side face of the axle box, and the grounding device body is rotatably connected with the grounding ring assembly. According to the bogie grounding device, the technical problem that when a rolling stock runs, a connecting rod device of an existing bogie grounding device always moves in all directions to adapt to the displacement between an axle and a framework, and breakage is prone to occurring is solved, and the grounding ring assembly and the grounding device body are arranged separately; a bearing and a connecting rod do not need to be designed to avoid rotation of the grounding device body, the risk of breakage of the connecting rod device is avoided, and the operation reliability of the whole bogie grounding device is improved.

Description

Technical Field

[0001] This utility model relates to the field of railway vehicle bogie technology, and in particular to a bogie grounding device. Background Technology

[0002] The bogie grounding device is responsible for returning the current obtained from the power grid to the track, forming a circuit. It also prevents current from passing through the axle box bearings and causing electro-corrosion that could damage them. Therefore, the reliability of the grounding device directly affects the safety and reliability of train operation. Currently, most external axle box bogies have their grounding devices installed on the axle box end covers. The carbon brushes of the grounding device contact the grounding plate installed at the axle end, guiding the current to the wheelset. The current is then transferred to the track through the contact between the wheels and the track, achieving a return flow. Alternatively, the grounding device can be installed on the gearbox output end cover; the current transfer is the same.

[0003] However, compared to traditional bogies, the axle box-in bogie has its axle box mounted inside the wheelset. The permanent magnet direct drive bogie does not have a gearbox, but instead mounts the motor directly between the two side beams. This results in a very compact lateral space for mounting the motor, coupling, axle box, and other components between the two wheelsets.

[0004] The current common method is to fix the grounding device to the end of the axle with fasteners, and use bearings and connecting rods to prevent the outer shell from rotating with the wheel. This method has the following problems: First, during locomotive and rolling stock operation, due to the dynamic movement of the primary springs, the connecting rod is constantly moving in all directions to adapt to the displacement between the axle and the frame. Long-term operation can easily lead to breakage of the connecting rod. Second, when turning the wheels of locomotives and rolling stock, the grounding device must be removed to position it with the turning equipment, which is inconvenient for maintenance work. Therefore, a bogie grounding device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a bogie grounding device that solves the technical problem that existing bogie grounding devices, when the locomotive is running, are prone to breakage due to the continuous movement of the connecting rod device in all directions to adapt to the displacement between the axle and the frame.

[0006] To achieve the above objectives, this utility model provides a bogie grounding device, comprising:

[0007] Frame;

[0008] An axle is rotatably mounted on the frame, and wheels are provided at both ends of the axle, with the wheels contacting the vehicle track;

[0009] A power assembly is connected to the axle via a transmission. The power assembly is used to drive the axle to rotate, thereby driving the wheels to move along the vehicle track.

[0010] A grounding ring assembly is connected to the axle via a transmission. The grounding ring assembly includes a first grounding ring and a second grounding ring spliced ​​together, wherein the first grounding ring and the second grounding ring are combined to form a closed ring shape.

[0011] An axle box is disposed on the inner side of the wheel and is rotatably connected to the axle. A grounding device body is integrally disposed on the outer peripheral side of the axle box and is rotatably connected to the grounding ring assembly.

[0012] Preferably, the power assembly includes: a motor mounted on the frame, the output end of the motor being driven by a motor end half-coupling, the motor end half-coupling being driven by a wheel end half-coupling, and the wheel end half-coupling being driven by the axle.

[0013] Preferably, the motor includes: a motor stator, a motor rotor rotatably disposed on the inner side of the motor stator in the circumferential direction, and the motor rotor being drivenly connected to the motor end half coupling.

[0014] Preferably, a hollow inner cavity is provided at the axis position of the motor rotor, and a hollow shaft transmission disk is installed inside the hollow inner cavity. The motor end half coupling and the wheel end half coupling are respectively located at the two ends of the hollow shaft transmission disk, and the axle passes through the axis position of the hollow shaft transmission disk.

[0015] Preferably, the motor rotor is connected to the motor end half-coupling via a first elastic element, and the hollow shaft transmission disc is connected to the wheel end half-coupling via a second elastic element.

[0016] Preferably, the grounding device body includes: an assembly housing, the assembly housing being integrally disposed on the outer peripheral side of the axle box, a grounding carbon brush assembly being disposed inside the assembly housing, and the end of the grounding carbon brush assembly facing away from the wheel abutting against the side of the grounding ring assembly.

[0017] Preferably, a grounding carbon brush spring is provided inside the assembly housing, with a first end of the grounding carbon brush spring connected to the assembly housing and a second end of the grounding carbon brush spring connected to the grounding carbon brush assembly.

[0018] Preferably, an axle box bearing is provided on the inner circumferential side of the axle box, and the axle box bearing is sleeved on the outer circumferential side of the axle.

[0019] Preferably, the first grounding ring has a first V-shaped limiting groove and a first V-shaped limiting protrusion on its two end faces along the circumferential direction, and the second grounding ring has a second V-shaped limiting groove and a second V-shaped limiting protrusion on its two end faces along the circumferential direction, the first V-shaped limiting groove being snapped into the second V-shaped limiting protrusion, and the second V-shaped limiting groove being snapped into the first V-shaped limiting protrusion.

[0020] Preferably, the first grounding ring and the second grounding ring are mounted on the wheel end half coupling by a number of bolts.

[0021] Compared to the aforementioned background technology, the bogie grounding device provided by this utility model has the following advantages: The grounding device body is integrally mounted on the outer periphery of the axle box, and the grounding ring assembly is connected to the axle. The current on the grounding device body is transmitted to the axle through the grounding ring assembly, and the current on the axle is transmitted to the vehicle track through the wheel. This avoids grounding current passing through the axle box bearings and thus preventing corrosion. Simultaneously, the linkage structure is eliminated, thereby avoiding the risk of linkage breakage and effectively improving the overall reliability of the bogie grounding device. Furthermore, the grounding ring assembly is formed by splicing a first grounding ring and a second grounding ring to form a closed loop shape, and the linkage structure is eliminated. When turning the locomotive wheels, the grounding ring assembly can be directly disassembled and installed without simultaneously disassembling the axle box and the grounding device body, making maintenance more convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is an assembly diagram of the bogie grounding device provided in an embodiment of the present utility model;

[0024] Figure 2 A perspective structural diagram of the bogie grounding device provided in an embodiment of this utility model;

[0025] Figure 3 This is a three-dimensional structural view of the bogie grounding device provided in an embodiment of the present invention from another angle;

[0026] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 5This is a partial cross-sectional schematic diagram of the bogie grounding device provided in an embodiment of the present utility model;

[0028] Figure 6 This is a plan view of the bogie grounding device provided in an embodiment of the present invention.

[0029] Specifically, 1-Axle; 2-Axle box; 3-Motor; 301-Motor stator; 302-Motor rotor; 303-Hollow inner cavity; 4-Grounding ring assembly; 401-First grounding ring; 402-First V-shaped limiting groove; 403-Second grounding ring; 404-Second V-shaped limiting protrusion; 5-Motor end half coupling; 6-Wheel end half coupling; 7-Hollow shaft transmission disc; 701-Through hole; 8-First elastic element; 9-Second elastic element; 10-Grounding device body; 1001-Assembly housing; 1002-Grounding carbon brush assembly; 1003-Grounding carbon brush spring; 11-Axle box bearing; 12-Wheel. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, in order to achieve the above objectives, this utility model provides a bogie grounding device, including: an axle 1, a power assembly, a grounding ring assembly 4, and an axle box 2, which are mounted on the frame (not shown in the figure).

[0033] The axle 1 is rotatably mounted on the frame, and wheels 12 are provided at both ends of the axle 1, with the wheels 12 contacting the vehicle track. The axle 1 is connected to a power assembly, which drives the axle 1 to rotate, thereby causing the wheels 12 to move along the vehicle track, so that the locomotive (not shown in the figure) can travel on the vehicle track.

[0034] In addition, the axle 1 is connected to the grounding ring assembly 4. The grounding ring assembly 4 adopts a split structure so that the grounding ring can be replaced without disassembling other components. Specifically, the grounding ring assembly 4 includes a first grounding ring 401 and a second grounding ring 403 spliced ​​together, and the first grounding ring 401 and the second grounding ring 403 are combined to form a closed ring shape. Preferably, the first grounding ring 401 and the second grounding ring 403 are installed on the wheel end half coupling 6 by several bolts. The first grounding ring 401 and the second grounding ring 403 can be flexibly disassembled and installed by removing the bolts. Moreover, since the linkage structure is eliminated, when the locomotive wheel needs to be turned, it is not necessary to disassemble and install the axle box 2 and the grounding device body 10 at the same time. The grounding ring assembly 4 can be directly disassembled and installed, which is more convenient for maintenance.

[0035] The axle box 2 is located inside the wheel 12 and is rotatably connected to the axle 1. Specifically, an axle box bearing 11 is provided on the inner circumferential side of the axle box 2, and the axle box bearing 11 is sleeved on the outer circumferential side of the axle 1. A grounding device body 10 is integrally provided on the outer circumferential side of the axle box 2, and the grounding device body 10 is rotatably connected to a grounding ring assembly 4. The current on the grounding device body 10 is transmitted to the axle 1 through the grounding ring assembly 4, and the current on the axle 1 is transmitted to the vehicle track through the wheel 12, thereby preventing grounding current from passing through the axle box bearing 11 and corroding it.

[0036] Preferably, the grounding device body 10 and the axle box 2 are integrally cast. There are two grounding device bodies 10, located on the left and right sides of the upper part of the axle box 2. Integrating the grounding device body 10 and the axle box 2 into a single casting effectively eliminates the risk of loosening and falling off caused by bolt connections. In addition, by integrally setting the grounding device body 10 on the outer periphery of the axle box 2, and connecting the grounding ring assembly 4 to the axle 1, the grounding ring assembly 4 is separated from the grounding device body 10. This eliminates the need for bearings and connecting rods to prevent the grounding device body 10 from rotating, thus eliminating the risk of connecting rod breakage. This effectively improves the reliability of the overall bogie grounding device and reduces safety hazards during locomotive and rolling stock operation.

[0037] In one embodiment of this utility model, the power assembly includes: a motor 3 mounted on a frame; the output end of the motor 3 is driven to a motor end half-coupling 5; the motor end half-coupling 5 is driven to a wheel end half-coupling 6; and the wheel end half-coupling 6 is driven to an axle 1. Specifically, a grounding ring assembly 4 is mounted on the wheel end half-coupling 6 and is fixedly connected to the wheel end half-coupling 6 through several fixing points. Specifically, the grounding ring assembly 4 is fixedly connected to the wheel end half-coupling 6 through three fixing points. At each fixing point, a first grounding ring 401 and a second grounding ring 403 are mounted on the wheel end half-coupling 6 using two bolts. Preferably, a fixing point is provided at each of the two connection points of the first grounding ring 401 and the second grounding ring 403, further improving the reliability of the connection between the first grounding ring 401 and the second grounding ring 403.

[0038] It should be noted that the motor 3 includes: a motor stator 301, with a motor end cover on the outer periphery of the motor stator 301; a motor rotor 302 rotatably mounted on the inner circumferential side of the motor stator 301; and a motor end half-coupling 5 connected to the motor rotor 302, which can drive the motor end half-coupling 5 to rotate synchronously. A hollow inner cavity 303 is located at the axis of the motor rotor 302, and a hollow shaft transmission disc 7 is installed inside the hollow inner cavity 303. The two ends of the hollow shaft transmission disc 7 are respectively provided with the motor end half-coupling 5 and the wheel end half-coupling 6. While the motor rotor 302 drives the motor end half-coupling 5 to rotate, the motor end half-coupling 5 drives the wheel end half-coupling 6 to rotate via the hollow shaft transmission disc 7.

[0039] In one embodiment of this utility model, the motor rotor 302 is connected to the motor end half-coupling 5 via a first elastic element 8, and the hollow shaft transmission disc 7 is connected to the wheel end half-coupling 6 via a second elastic element 9. During the starting, braking, or operation of the locomotive, instantaneous impact loads are generated between the motor rotor 302 and the motor end half-coupling 5. The first elastic element 8 can absorb these impacts, avoiding stress concentration and component damage caused by rigid connections, thus protecting the motor rotor 302 and the motor end half-coupling 5. On the other hand, when the motor rotor 302 rotates, the vibration of the motor rotor 302 is transmitted to the transmission system through the motor end coupling. The first elastic element 8 and the second elastic element 9 can effectively isolate the vibration, reducing the negative impact on components such as the axle box 2 and bearings, and improving operational stability. Moreover, the flexible connection between the motor rotor 302 and the motor end half-coupling 5 via the first elastic element 8, and the flexible connection between the hollow shaft transmission disc 7 and the wheel end half-coupling 6 via the second elastic element 9, makes torque transmission smoother, avoiding instantaneous impacts or fluctuations that may occur with rigid connections, and improving the stability of the locomotive during operation.

[0040] It should be noted that a through hole 701 is provided at the axial position of the hollow shaft transmission disk 7. The axle 1 passes through the through hole 701 and is rotatably connected to the through hole 701. The axle 1 is also rotatably connected to the motor end half coupling 5. The motor end half coupling 5 is sleeved on the outer circumferential side of the axle 1. The motor rotor 302 drives the motor end half coupling 5 to rotate. The motor end half coupling 5 drives the wheel end half coupling 6 to rotate through the hollow shaft transmission disk 7. The wheel end half coupling 6 drives the wheel 12 to rotate through the axle 1, so as to drive the locomotive and rolling stock to move on the vehicle track.

[0041] The grounding device body 10 includes: a mounting housing 1001, which is integrally disposed on the outer peripheral side of the axle box 2. A grounding carbon brush assembly 1002 is disposed inside the mounting housing 1001. The end of the grounding carbon brush assembly 1002 facing away from the wheel 12 abuts against the side of the grounding ring assembly 4. The grounding carbon brush assembly 1002 abuts against the grounding ring assembly 4 to transmit the current on the grounding device body 10 to the axle 1 through the grounding ring assembly 4. Furthermore, by integrally disposing of the mounting housing 1001 on the outer peripheral side of the axle box 2, the grounding carbon brush assembly 1002 is within the visible range for routine maintenance, facilitating inspection by personnel to check the wear condition of the grounding carbon brush assembly 1002 and whether the grounding carbon brush spring 1003 has failed, effectively improving maintenance efficiency and enhancing practicality.

[0042] like Figure 2 and Figure 5 As shown, a grounding carbon brush spring 1003 is provided inside the assembly housing 1001. The first end of the grounding carbon brush spring 1003 is connected to the assembly housing 1001, and the second end of the grounding carbon brush spring 1003 is connected to the grounding carbon brush assembly 1002. Specifically, the length direction of the grounding carbon brush spring 1003 is consistent with the axial direction of the axle 1 to ensure that the grounding carbon brush assembly 1002 can move in and out along the axial direction of the axle 1, so that the grounding carbon brush assembly 1002 can always maintain stable contact with the grounding ring assembly 4, thereby ensuring that the current on the grounding device body 10 can be continuously transmitted to the grounding ring assembly 4.

[0043] like Figure 4 and Figure 6As shown, in one embodiment of this utility model, the first grounding ring 401 is provided with a first V-shaped limiting groove 402 and a first V-shaped limiting protrusion on its two end faces along the circumferential direction, and the second grounding ring 403 is provided with a second V-shaped limiting groove and a second V-shaped limiting protrusion 404 on its two end faces along the circumferential direction. The first V-shaped limiting groove 402 is engaged with the second V-shaped limiting protrusion 404, and the second V-shaped limiting groove is engaged with the first V-shaped limiting protrusion. This allows the first grounding ring 401 and the second grounding ring 403 to be stably fitted together, and also prevents the first grounding ring 401 and the second grounding ring 403 from being misaligned in the axial direction. This prevents the grounding carbon brush assembly 1002 from jumping during the process of moving from the axial side of the first grounding ring 401 to the axial side of the second grounding ring 403, and during the process of moving from the axial side of the second grounding ring 403 to the axial side of the first grounding ring 401. This ensures that the grounding carbon brush assembly 1002 can smoothly transition at the connection between the first grounding ring 401 and the second grounding ring 403.

[0044] In use, when the present invention is activated, the motor 3 is started, and the motor rotor 302 drives the motor end half-coupling 5 to rotate synchronously through the first elastic element 8. The motor end half-coupling 5 drives the wheel end half-coupling 6 to rotate through the hollow shaft transmission disc 7. The wheel end half-coupling 6 drives the wheel 12 to rotate through the axle 1, thereby driving the locomotive and vehicle to move on the vehicle track. The wheel end half-coupling 6 drives the grounding ring assembly 4 to rotate, and the grounding carbon brush assembly 1002 on the grounding device body 10 alternately contacts the first grounding ring 401 and the second grounding ring 403. At the same time, the grounding current is transmitted from the grounding device body 10 to the grounding carbon brush assembly 1002, the current on the grounding carbon brush assembly 1002 is transmitted to the grounding ring assembly 4, the current on the grounding ring assembly 4 is transmitted to the wheel end half-coupling 6, the current on the wheel end half-coupling 6 is transmitted to the axle 1, the current on the axle 1 is transmitted to the wheel 12, and the current on the wheel 12 is finally transmitted to the vehicle track, thereby preventing grounding current from passing through the axle box bearing 11 and corroding the bearing.

[0045] In summary, by integrating the grounding device body 10 onto the outer periphery of the axle box 2 and setting the grounding ring assembly 4 on the wheel end half coupling 6, and separating the grounding ring assembly 4 from the grounding device body 10, it is no longer necessary to design bearings and connecting rods to prevent the grounding device body 10 from rotating. This avoids the risk of connecting rod breakage and effectively improves the reliability of the overall bogie grounding device operation.

[0046] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0047] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A bogie grounding device, characterized by, include: Frame; An axle is rotatably mounted on the frame, and wheels are provided at both ends of the axle, with the wheels contacting the vehicle track; A power assembly is connected to the axle via a transmission. The power assembly is used to drive the axle to rotate, thereby driving the wheels to move along the vehicle track. A grounding ring assembly is connected to the axle via a transmission. The grounding ring assembly includes a first grounding ring and a second grounding ring spliced ​​together, and the first grounding ring and the second grounding ring are combined to form a closed ring shape. An axle box is disposed on the inner side of the wheel and is rotatably connected to the axle. A grounding device body is integrally disposed on the outer peripheral side of the axle box and is rotatably connected to the grounding ring assembly.

2. The truck grounding device of claim 1, wherein, The power assembly includes: a motor mounted on the frame, the output end of the motor being driven by a motor end half-coupling, the motor end half-coupling being driven by a wheel end half-coupling, and the wheel end half-coupling being driven by the axle.

3. A bogie grounding device according to claim 2, wherein The motor includes: a motor stator, and a motor rotor rotatably disposed on the inner side of the motor stator in the circumferential direction, the motor rotor being drivenly connected to the motor end half coupling.

4. The truck grounding device of claim 3, wherein, A hollow inner cavity is provided at the axis position of the motor rotor, and a hollow shaft transmission disk is installed inside the hollow inner cavity. The motor end half coupling and the wheel end half coupling are respectively located at the two ends of the hollow shaft transmission disk, and the axle passes through the axis position of the hollow shaft transmission disk.

5. A bogie grounding device according to claim 4, wherein The motor rotor is connected to the motor end half coupling via a first elastic element, and the hollow shaft transmission disc is connected to the wheel end half coupling via a second elastic element.

6. The bogie grounding device of claim 1, wherein The grounding device body includes: an assembly housing, which is integrally disposed on the outer peripheral side of the axle box, and a grounding carbon brush assembly is disposed inside the assembly housing, with one end of the grounding carbon brush assembly facing away from the wheel abutting against the side of the grounding ring assembly.

7. A bogie grounding device according to claim 6, wherein A grounding carbon brush spring is provided inside the assembly housing. The first end of the grounding carbon brush spring is connected to the assembly housing, and the second end of the grounding carbon brush spring is connected to the grounding carbon brush assembly.

8. The truck grounding device of claim 1, wherein, An axle box bearing is provided on the inner circumferential side of the axle box, and the axle box bearing is sleeved on the outer circumferential side of the axle.

9. The truck grounding device of claim 2, wherein, The first grounding ring has a first V-shaped limiting groove and a first V-shaped limiting protrusion on its two end faces along the circumferential direction, and the second grounding ring has a second V-shaped limiting groove and a second V-shaped limiting protrusion on its two end faces along the circumferential direction. The first V-shaped limiting groove is snapped into the second V-shaped limiting protrusion, and the second V-shaped limiting groove is snapped into the first V-shaped limiting protrusion.

10. The truck grounding device of claim 9, wherein, The first grounding ring and the second grounding ring are mounted on the wheel end half coupling by a number of bolts.

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