Axle box assembly and rail vehicle

Abstract

The utility model provides a kind of axle box assembly and railway vehicle, it includes: axle box body, including the inner side wall and outer side wall being oppositely spaced and the bottom wall being connected respectively inner side wall and outer side wall, the accommodating cavity is formed between inner side wall, outer side wall and bottom wall, bottom wall has respectively with the first opening and the outer expansion area located in bottom wall far from the side of inner side wall Communication accommodating cavity;Bearing assembly, including bearing body, the inner end of bearing body is worn in inner side wall, the outer end of bearing body is correspondingly arranged with outer expansion area, to make the first probe of infrared axle temperature detection equipment can directly detect the temperature of the outer end of bearing body by outer expansion area.The present application can solve the problem that the infrared axle temperature detection equipment cannot accurately detect the temperature of the bearing when the railway vehicle runs through the infrared axle temperature detection equipment installed on the ground, affecting the safe operation of the railway vehicle.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, and more specifically, to an axle box assembly and a rail vehicle. Background Technology

[0002] In welded frame bogies, the bearings are housed within the axle boxes, and the wheel axles of the rail vehicle's wheelsets pass through these bearings. Currently, most axle boxes have a closed bottom structure. When a rail vehicle passes by an infrared axle temperature detection device installed on the ground, the device cannot accurately detect the bearing temperature, affecting the operational safety of the rail vehicle. Utility Model Content

[0003] The main objective of this invention is to provide an axle box assembly and a rail vehicle to solve the problem in the prior art where the infrared axle temperature detection device installed on the ground cannot accurately detect the bearing temperature when the rail vehicle is running, thus affecting the operational safety of the rail vehicle.

[0004] To achieve the above objectives, this utility model provides an axle box assembly, comprising: an axle box body, including an inner sidewall and an outer sidewall spaced apart from each other, and a bottom wall connecting the inner sidewall and the outer sidewall respectively, forming a receiving cavity between the inner sidewall, the outer sidewall and the bottom wall, and the bottom wall having a first opening communicating with the receiving cavity and an outward expansion area located on the side of the bottom wall away from the inner sidewall; and a bearing assembly, including a bearing body, the inner end of the bearing body passing through the inner sidewall, and the outer end of the bearing body corresponding to the outward expansion area, so that the first probe of the infrared axle temperature detection device can directly detect the temperature of the outer end of the bearing body through the outward expansion area.

[0005] Furthermore, the lateral distance between the inner wall surface of the outward expansion region and the end face of the outer end of the bearing body is greater than the lateral distance between the inner surface of the outer wall and the end face of the outer end of the bearing body.

[0006] Furthermore, the bottom wall includes two connecting sections and a reinforcing section for connecting the two connecting sections. A first opening is formed between the two connecting sections. The reinforcing section and the two connecting sections enclose an outwardly expanding groove that communicates with the first opening. The inner wall surface of the outwardly expanding groove encloses an outwardly expanding area.

[0007] Furthermore, the end face of the bottom of the reinforcing section is flush with the end face of the bottom of the connecting section, and the reinforcing section protrudes from the outer surface of the connecting section; or, a first reinforcing rib is provided at the bottom of the connecting section, and the first reinforcing rib is located at one end of the connecting section near the outer side wall; or, the axle box body also includes a second reinforcing rib, the second reinforcing rib is located on the side of the bottom wall near the inner side wall, one end of the second reinforcing rib is connected to the bottom end of one of the connecting sections, and the other end is connected to the bottom end of the other connecting section.

[0008] Furthermore, a through hole is provided on the outer wall, which communicates with the receiving cavity. The bottom of the through hole has a second opening, which communicates with the outward expansion area.

[0009] Furthermore, along the axial direction of the bearing assembly, the projection of the bearing assembly onto the reference plane lies within the contour of the projection of the through hole onto the reference plane, and the reference plane is a plane perpendicular to the axis of the bearing assembly.

[0010] Furthermore, the bearing assembly also includes: a bearing end cap disposed on the outer end of the bearing body, at least a portion of which passes through a through hole.

[0011] Furthermore, the through hole includes a semi-circular hole section and a straight hole section that are interconnected. The semi-circular hole section is coaxial with the bearing assembly, and the straight hole section is located below the semi-circular hole section. The bottom of the straight hole section has a second opening, and the length of the straight hole section is greater than or equal to the outer diameter of the bearing assembly.

[0012] Furthermore, the through hole also includes a transition hole section, which is located between the semi-circular hole section and the straight hole section. The top end of the transition hole section is connected to the semi-circular hole section, and the bottom end of the transition hole section is connected to the straight hole section. The length of the top end of the transition hole section is less than the length of the bottom end of the transition hole section.

[0013] Furthermore, the axle box body also includes a top wall connecting the top of the inner side wall and the top of the outer side wall, and a third reinforcing rib is provided on the top wall; or, a heat dissipation hole is provided on the inner side wall, and the heat dissipation hole communicates with the receiving cavity.

[0014] According to another aspect of the present invention, a rail vehicle is provided that includes the aforementioned axle box assembly.

[0015] By applying the technical solution of this utility model, through the special design of the first opening and the outer expansion area, the first probe of the infrared shaft temperature detection device can directly detect the temperature of the outer end of the bearing body through the outer expansion area, and the second probe can directly detect the temperature of the middle part of the bearing body through the first opening. In this way, two-point temperature measurement of the bearing body can be achieved, and potential fault risks of the bearing body can be detected in time, thereby improving the safety of the rail vehicle during operation. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This invention provides a first-view structural schematic diagram of the axle box assembly.

[0018] Figure 2This invention provides a second-view structural schematic diagram of the axle box assembly.

[0019] Figure 3 This invention provides a first-view structural schematic diagram of the axle box body.

[0020] Figure 4 This invention provides a second-view structural schematic diagram of the axle box body.

[0021] Figure 5 The diagram shows a third-view structural schematic of the axle box body provided by this utility model.

[0022] The above figures include the following reference numerals:

[0023] 10. Axle box body; 101. Receiving cavity; 102. First opening; 103. Outward expansion area;

[0024] 11. Inner sidewall; 1101. Heat dissipation hole; 1102. Mounting hole;

[0025] 12. Outer wall; 121. Through hole; 1211. Semicircular hole section; 1212. Straight hole section; 1213. Transition hole section; 122. Second opening;

[0026] 13. Bottom wall; 131. Connecting section; 132. Reinforcing section;

[0027] 14. Top wall;

[0028] 20. Bearing assembly; 21. Bearing body; 211. Outer end; 22. End cap;

[0029] 30. First reinforcing rib;

[0030] 40. Second reinforcing rib;

[0031] 50. Third reinforcing rib;

[0032] 01. Infrared axle temperature detection equipment; 011. First probe; 012. Second probe; 02. Wheelset. Detailed Implementation

[0033] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] like Figures 1 to 5 As shown, this utility model embodiment provides an axle box assembly, which includes an axle box body 10 and a bearing assembly 20. The axle box body 10 includes an inner sidewall 11 and an outer sidewall 12 arranged at intervals, and a bottom wall 13 connecting the inner sidewall 11 and the outer sidewall 12 respectively. A receiving cavity 101 is formed between the inner sidewall 11, the outer sidewall 12 and the bottom wall 13. The bottom wall 13 has a first opening 102 communicating with the receiving cavity 101 and an outward expansion region 103 located on the side of the bottom wall 13 away from the inner sidewall 11. The bearing assembly 20 includes a bearing body 21. The inner end of the bearing body 21 passes through the inner sidewall 11, and the outer end 211 of the bearing body 21 is correspondingly arranged with the outward expansion region 103, so that the first probe 011 of the infrared shaft temperature detection device 01 can directly detect the temperature of the outer end 211 of the bearing body 21 through the outward expansion region 103, and the second probe 012 of the infrared shaft temperature detection device 01 can directly detect the temperature of the middle part of the bearing body 21 through the first opening 102.

[0035] By applying the technical solution of this utility model, through the special design of the first opening 102 and the outer expansion area 103, the first probe 011 of the infrared shaft temperature detection device 01 can directly detect the temperature of the outer end 211 of the bearing body 21 through the outer expansion area 103, and the second probe 012 can directly detect the temperature of the middle part of the bearing body 21 through the first opening 102. In this way, two-point temperature measurement of the bearing body 21 can be achieved, and potential fault risks of the bearing body 21 can be detected in time, thereby improving the safety of the rail vehicle during operation.

[0036] In the existing technical solution, the infrared axle temperature detection device 01 for detecting the bearing body 21 of the axle box assembly of a rail vehicle includes a first probe 011 and a second probe 012. In the embodiment of this solution, the first opening 102 and the outer expansion area 103 are distributed along the axial direction of the bearing body 21. When installing the infrared axle temperature detection device 01, the first probe 011 and the second probe 012 are distributed at intervals along the axial direction of the bearing body 21. In this way, the first probe 011 is correspondingly set to the outer end 211 of the bearing body 21, and the second probe 012 is correspondingly set to the middle position of the bearing body 21.

[0037] Understandably, the first probe 011 can directly detect the temperature of the outer end 211 of the bearing body 21 through the extended region 103. This "direct detection" does not refer to direct physical contact, but rather that there is no physical barrier forming an obstruction between the outer end 211 of the bearing body 21 and the first probe 011 along the height direction, allowing the first probe 011 to directly receive the infrared radiation emitted by the outer end 211 of the bearing body 21. Similarly, the second probe 012 can directly detect the temperature of the middle part of the bearing body 21 through the first opening 102. Again, this "direct detection" does not refer to direct physical contact, but rather that there is no physical barrier forming an obstruction between the middle part of the bearing body 21 and the second probe 012 along the height direction, allowing the second probe 012 to receive the infrared radiation emitted by the middle part of the bearing body 21.

[0038] It should be noted that the axle box assembly is used in conjunction with the wheelset 02 of the rail vehicle, with one axle box assembly corresponding to each end of each wheelset 02. Among the two axle box assemblies corresponding to a single wheelset 02, the side of the two axle box assemblies that are closer to each other along the axis of the wheelset 02 is defined as the inner side, and the side of the two axle box assemblies that are farther apart from each other is defined as the outer side.

[0039] In this embodiment, the outer end 211 of the bearing body 21 is completely located within the receiving cavity 101. The lateral distance between the inner wall surface of the outward expansion region 103 and the end face of the outer end 211 of the bearing body 21 is greater than the lateral distance between the inner surface of the outer wall 12 and the end face of the outer end 211 of the bearing body 21. This configuration increases the size of the entire opening at the bottom of the axle box body 10 (formed by the first opening 102 and the outward expansion region 103) along the axial direction of the bearing body 21, allowing the first probe 011 to be aligned with the outer end 211 of the bearing body 21 at a larger field of view. This means the first probe 011 can receive more infrared radiation energy from the outer end 211 of the bearing body 21, improving detection accuracy. Furthermore, this configuration does not require increasing the size of the entire axle box body 10 along the axial direction of the bearing assembly 20, facilitating miniaturization of the axle box body 10.

[0040] Specifically, the bottom wall 13 includes two connecting sections 131 and a reinforcing section 132 for connecting the two connecting sections 131. A first opening 102 is formed between the two connecting sections 131. The reinforcing section 132 and the two connecting sections 131 form an expanding groove that communicates with the first opening 102. The inner wall of the expanding groove forms an expanding region 103. This arrangement ensures the structural stability of the bottom wall 13 while also forming the expanding region 103.

[0041] In this embodiment, the two connecting segments 131 are spaced apart along a distribution direction perpendicular to the inner sidewall 11 and the outer sidewall 12. The overall opening formed by the outward expansion region 103 and the first opening 102 is approximately rectangular.

[0042] Specifically, the end face of the bottom of the reinforcing section 132 is flush with the end face of the bottom of the connecting section 131 to ensure the flatness of the lower surface of the bottom wall 13 near the outer wall 12. The reinforcing section 132 protrudes from the outer surface of the connecting section 131. This arrangement allows the reinforcing section 132 and the two connecting sections 131 to form an expanding groove that communicates with the first opening 102.

[0043] In this embodiment of the solution, the reinforcing segment 132 is generally a straight-line structure. The extension direction of the reinforcing segment 132 is the same as the distribution direction of the two connecting segments 131. The two ends of the reinforcing segment 132 are respectively connected to the outer surface arc transition of the two connecting segments 131.

[0044] Furthermore, each connecting segment 131 is provided with a first reinforcing rib 30 at its bottom. The first reinforcing rib 30 is located at the end of the corresponding connecting segment 131 near the outer wall 12, and the length direction of the first reinforcing rib 30 is the same as the length direction of the reinforcing segment 132. This arrangement can improve the structural stability of the outer side of the connecting segment 131.

[0045] In this embodiment, the axle box body 10 further includes a second reinforcing rib 40. The second reinforcing rib 40 is located on the side of the bottom wall 13 near the inner sidewall 11. One end of the second reinforcing rib 40 is connected to the bottom end of one of the connecting segments 131, and the other end is connected to the bottom end of the other connecting segment 131. The second reinforcing rib 40 is located on the side of the first opening 102 near the inner sidewall 11, and the length direction of the second reinforcing rib 40 is the same as the length direction of the reinforcing segment 132. The provision of the second reinforcing rib 40 can further improve the structural strength of the bottom wall 13.

[0046] It is understandable that the first reinforcing rib 30 and the second reinforcing rib 40 are not obstructed by the first opening 102 and the outward expansion area 103. This arrangement facilitates the detection of the temperature of the bearing body 21 by the first probe 011 and the second probe 012 of the infrared shaft temperature detection device 01.

[0047] Furthermore, a through hole 121 is provided on the outer wall 12, which communicates with the receiving cavity 101. The bottom of the through hole 121 has a second opening 122, which communicates with the outward expansion area 103. This arrangement reduces the material used in the outer wall 12, thereby reducing the weight of the axle box body 10. Moreover, the through hole 121's communication with the receiving cavity 101 promotes air circulation between the internal space of the axle box body 10 and the outside environment, helping to dissipate the heat generated by the bearing assembly 20 during operation.

[0048] Furthermore, along the axial direction of the bearing assembly 20, the projection of the bearing assembly 20 onto the reference plane lies within the contour of the projection of the through hole 121 onto the reference plane, where the reference plane is a plane perpendicular to the axis of the bearing assembly 20. The bearing assembly 20 also includes a bearing end cap 22, which is disposed on the outer end 211 of the bearing body 21, with at least a portion of the bearing end cap 22 passing through the through hole 121. This arrangement provides space for the bearing end cap 22 within the through hole 121, improving the structural compactness of the axle box assembly.

[0049] It is understood that the bearing body 21 includes an outer ring and an inner ring that are nested together. The inner ring is rotatably disposed relative to the outer ring. One end of the outer ring passes through the inner sidewall 11 and is fixedly connected to the inner sidewall 11. The bearing end cap 22 is fixed on the end of the outer ring near the outer sidewall 12.

[0050] Furthermore, the through hole 121 includes a semi-circular hole section 1211 and a straight hole section 1212 that are interconnected. The semi-circular hole section 1211 is coaxial with the bearing assembly 20, and the straight hole section 1212 is located below the semi-circular hole section 1211. The bottom of the straight hole section 1212 has a second opening 122, and the length of the straight hole section 1212 is greater than or equal to the outer diameter of the bearing assembly 20. It can be understood that the length direction of the straight hole section 1212 is the same as the length direction of the reinforcing section 132. The above arrangement allows the contour of the semi-circular hole section 1211 to match the contour of the top end of the bearing end cover 22, facilitating the bearing end cover 22 to pass through the semi-circular hole section 1211. The length of the straight hole section 1212 is greater than or equal to the outer diameter of the bearing assembly 20, which allows the dimension of the straight hole section 1212 along the running direction of the rail vehicle to be greater than or equal to the outer diameter of the bearing assembly 20, facilitating the first probe 011 to detect the temperature of the outer end 211 of the bearing body 21.

[0051] In this embodiment, the through hole 121 further includes a transition section 1213. The transition section 1213 is located between the semi-circular hole section 1211 and the straight hole section 1212. The top end of the transition section 1213 connects to the semi-circular hole section 1211, and the bottom end of the transition section 1213 connects to the straight hole section 1212. The length of the top end of the transition section 1213 is shorter than the length of the bottom end of the transition section 1213. It is understood that the length direction of the transition section 1213 is the same as the length direction of the straight hole section 1212. The provision of the transition section 1213 serves as a transition between the semi-circular hole section 1211 and the straight hole section 1212, reducing abrupt changes in the dimensions of the through hole 121 along the length direction of the reinforcing section 132, and improving the structural strength of the outer wall 12.

[0052] Specifically, along the direction from the semicircular hole section 1211 to the straight hole section 1212, the length of the transition hole section 1213 gradually increases. In this embodiment, the transition hole section 1213 is an isosceles trapezoidal hole structure.

[0053] Furthermore, the axle box body 10 also includes a top wall 14 connecting the top end of the inner side wall 11 and the top end of the outer side wall 12, and a third reinforcing rib 50 is provided on the top wall 14. The provision of the third reinforcing rib 50 can further improve the structural strength of the axle box body 10.

[0054] In this embodiment, multiple third reinforcing ribs 50 are provided, and the multiple third reinforcing ribs 50 are distributed at intervals along the direction from the inner sidewall 11 to the outer sidewall 12.

[0055] In some embodiments of this solution, the axle box assembly also includes a bearing saddle, which is disposed in the receiving cavity 101, located above the bearing body 21, engaging with the outer ring of the bearing body 21, and fixed to the axle box body 10.

[0056] Furthermore, an installation hole 1102 is provided on the inner sidewall 11, and one end of the outer ring of the bearing body 21 passes through the installation hole 1102 and is fixedly connected to the hole wall of the installation hole 1102.

[0057] In this embodiment of the solution, a heat dissipation hole 1101 is also provided on the inner sidewall 11, and the heat dissipation hole 1101 communicates with the receiving cavity 101. The provision of the heat dissipation hole 1101 can improve the heat dissipation effect of the inner end of the bearing assembly 20 and extend the service life of the bearing assembly 20.

[0058] This solution does not limit the number, shape, or specific location of the heat dissipation holes 1101.

[0059] In this embodiment, there is one heat dissipation hole 1101, which is an elongated hole located below the mounting hole 1102 and above the second reinforcing rib 40. This arrangement minimizes the impact of the heat dissipation hole 1101 on the structural strength of the inner wall 11.

[0060] According to another aspect of the present invention, a rail vehicle is provided that includes the aforementioned axle box assembly.

[0061] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0062] 1. By forming a first opening 102 and an outward expansion area 103 on the bottom wall 13, infrared temperature detection can be achieved at two key locations: the middle and the outer end 211 of the bearing body 21. That is, the first probe 011 and the second probe 012 of the infrared shaft temperature detection device 01 installed on the ground can directly receive the infrared radiation from the outer end 211 and the middle of the bearing body 21 without being blocked by physical obstacles, thus improving the accuracy of temperature monitoring of the bearing body 21.

[0063] 2. The bottom wall 13 of the axle box body 10 includes two connecting sections 131 and a reinforcing section 132. A first reinforcing rib 30 and a second reinforcing rib 40 are provided on the connecting section 131. Neither the first reinforcing rib 30 nor the second reinforcing rib 40 obstructs the first opening 102 and the outward expansion area 103. This arrangement can ensure the structural strength of the bottom wall 13 while also ensuring that the infrared shaft temperature detection device 01 can detect the temperature of the outer end 211 and the middle part of the bearing body 21.

[0064] 3. By providing a through hole 121 on the outer side wall 12, and having at least a portion of the bearing end cover 22 pass through the through hole 121, the device can be made lightweight and compact.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shaft box assembly, characterized in that, The axle box assembly includes: The axle box body (10) includes an inner sidewall (11) and an outer sidewall (12) arranged at relative intervals, and a bottom wall (13) connecting the inner sidewall (11) and the outer sidewall (12) respectively. A receiving cavity (101) is formed between the inner sidewall (11), the outer sidewall (12) and the bottom wall (13). The bottom wall (13) has a first opening (102) communicating with the receiving cavity (101) and an outwardly expanding region (103) located on the side of the bottom wall (13) away from the inner sidewall (11). The bearing assembly (20) includes a bearing body (21), the inner end of which passes through the inner sidewall (11), and the outer end (211) of the bearing body (21) is correspondingly arranged with the outer expansion area (103) so that the first probe (011) of the infrared shaft temperature detection device (01) can directly detect the temperature of the outer end (211) of the bearing body (21) through the outer expansion area (103).

2. The axle box assembly according to claim 1, characterized in that, The lateral distance between the inner wall of the outer expansion area (103) and the end face of the outer end (211) of the bearing body (21) is greater than the lateral distance between the inner surface of the outer wall (12) and the end face of the outer end (211) of the bearing body (21).

3. The axle box assembly according to claim 1, characterized in that, The bottom wall (13) includes two connecting sections (131) and a reinforcing section (132) for connecting the two connecting sections (131). The first opening (102) is formed between the two connecting sections (131). The reinforcing section (132) and the two connecting sections (131) form an outwardly expanding groove that communicates with the first opening (102). The inner wall surface of the outwardly expanding groove forms the outwardly expanding area (103).

4. The axle box assembly according to claim 3, characterized in that, The end face of the bottom end of the reinforcing section (132) is flush with the end face of the bottom end of the connecting section (131), and the reinforcing section (132) protrudes from the outer surface of the connecting section (131); or, The bottom of the connecting segment (131) is provided with a first reinforcing rib (30), and the first reinforcing rib (30) is located at one end of the connecting segment (131) near the outer side wall (12); or, The axle box body (10) also includes a second reinforcing rib (40), which is located on the side of the bottom wall (13) near the inner side wall (11). One end of the second reinforcing rib (40) is connected to the bottom end of one of the connecting segments (131), and the other end is connected to the bottom end of the other connecting segment (131).

5. The axle box assembly according to any one of claims 1 to 4, characterized in that, A through hole (121) is provided on the outer side wall (12), the through hole (121) is connected to the receiving cavity (101), and the bottom of the through hole (121) has a second opening (122), the second opening (122) is connected to the outward expansion area (103).

6. The axle box assembly according to claim 5, characterized in that, Along the axial direction of the bearing assembly (20), the projection of the bearing assembly (20) on the reference surface is located within the outline of the projection of the through hole (121) on the reference surface, and the reference surface is a plane perpendicular to the axis of the bearing assembly (20).

7. The axle box assembly according to claim 6, characterized in that, The bearing assembly (20) also includes: A bearing end cap (22) is disposed on the outer end (211) of the bearing body (21), and at least a portion of the bearing end cap (22) passes through the through hole (121).

8. The axle box assembly according to claim 6, characterized in that, The through hole (121) includes a semi-circular hole section (1211) and a straight hole section (1212) that are connected to each other. The semi-circular hole section (1211) is coaxial with the bearing assembly (20). The straight hole section (1212) is located below the semi-circular hole section (1211). The bottom of the straight hole section (1212) has the second opening (122). The length of the straight hole section (1212) is greater than or equal to the outer diameter of the bearing assembly (20).

9. The axle box assembly according to claim 8, characterized in that, The through hole (121) further includes a transition hole section (1213), which is located between the semi-circular hole section (1211) and the straight hole section (1212). The top end of the transition hole section (1213) is connected to the semi-circular hole section (1211), and the bottom end of the transition hole section (1213) is connected to the straight hole section (1212). The length of the top end of the transition hole section (1213) is less than the length of the bottom end of the transition hole section (1213).

10. The axle box assembly according to any one of claims 1 to 4, characterized in that, The axle box body (10) further includes a top wall (14) connecting the top end of the inner side wall (11) and the top end of the outer side wall (12), and the top wall (14) is provided with a third reinforcing rib (50); or, The inner sidewall (11) is provided with heat dissipation holes (1101), which are connected to the receiving cavity (101).

11. A rail vehicle, characterized in that, Includes the axle box assembly according to any one of claims 1 to 10.

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