Vibration reduction device for axle box and axle box

Abstract

The present invention discloses a vibration damping device for an axle box and an axle box, comprising: an axle box body, provided with a vibration damping hole; a vibration damping box, fitted to the surface of the side of the axle box body provided with the vibration damping hole and arranged around the outer periphery of the vibration damping hole, the vibration damping box having an opening corresponding to the position of the vibration damping hole, and a cavity provided inside the vibration damping box; damping particles filled in the cavity. The axle box body is provided with a vibration damping hole and a vibration damping box, and the vibration damping box is arranged near the vibration damping hole so that the vibration damping hole and the vibration damping box form a superimposed vibration damping effect, thereby achieving a better vibration damping effect. Damping particles are arranged in the cavity of the vibration damping box. In this way, during the operation of a rail vehicle containing the axle box, the damping particles in the cavity of the vibration damping box can be used to increase the structural damping, which plays a role in consuming vibration energy, thereby reducing the vibration of the axle box, especially being beneficial in suppressing broadband vibration and reducing vibration transmission, thereby reducing the vibration fatigue of the axle box, improving the working life of the axle box, and increasing the service life of the axle box.

Description

Technical Field

[0001] The present invention relates to the technical field of axle box vibration reduction, and more specifically, to a vibration reduction device for an axle box. In addition, the present invention also relates to an axle box comprising the vibration reduction device for an axle box. Background Art

[0002] As the operating mileage and speed of rail vehicles continue to increase, fatigue strength problems of the bogie frame and its main load-bearing components are gradually emerging.

[0003] The axlebox is a key component of the bogie of a railway vehicle, used to transfer the vehicle's weight and load to the wheelset. Its fatigue failure has a significant impact on the fatigue strength of the bogie. However, in related technologies, the axlebox is prone to vibration fatigue.

[0004] Therefore, how to solve the problem that the axle box is prone to vibration fatigue is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a vibration damping device for an axle box, which can be applied to the axle box to reduce vibration fatigue of the axle box.

[0006] Another object of the present invention is to provide an axle box including the above-mentioned vibration damping device for an axle box, which is not prone to vibration fatigue.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A vibration damping device for an axle box, comprising:

[0009] The axle box body is provided with a vibration reduction hole;

[0010] A vibration damping box is attached to the surface of the side portion of the axle box body where the vibration damping hole is opened, and is arranged around the outer periphery of the vibration damping hole. The vibration damping box has an opening at a position corresponding to the vibration damping hole, and a cavity is provided inside the vibration damping box.

[0011] Damping particles are filled in the cavity.

[0012] Optionally, it also includes:

[0013] A filling bag is provided in which the damping particles are filled. The filling bag is provided in the cavity.

[0014] Optionally, the filling bag comprises an elastic film sleeve.

[0015] Optionally, there is at least one cavity, and each cavity is provided with at least two filling bags.

[0016] Optionally, at least two filling bags are provided on the periphery of the vibration-damping hole.

[0017] Optionally, the damping particles are arranged in a single-layer array in the cavity.

[0018] Optionally, the axle box includes:

[0019] The axle box body has a rear cover on the top;

[0020] A front connecting part, including an axis hole, a rubber cover is provided on the top of the front connecting part, and a supporting rubber pressure plate is provided on the side of the front connecting part;

[0021] A connecting plate, connected laterally between the axle box body and the front connecting portion, is provided with a vibration-damping hole penetrating the wall thickness thereof, and the vibration-damping boxes are respectively provided on both sides of the connecting plate, and the vibration-damping boxes on both sides of the connecting plate are symmetrically arranged;

[0022] a first reinforcing rib plate connected between the axle box body and the front connecting portion, located above the connecting plate, perpendicular to the connecting plate, and arranged horizontally, wherein the width of the first reinforcing rib plate gradually increases from the end connected to the front connecting portion to the end connected to the axle box body;

[0023] a second reinforcing rib plate connected between the axle box body and the front connecting portion, located below the connecting plate, perpendicular to the connecting plate, and inclined in a direction gradually away from the connecting plate from the end connected to the front connecting portion to the end connected to the axle box body, and gradually increasing in width from the end connected to the front connecting portion to the end connected to the axle box body;

[0024] The vibration damping box includes a box body and a fixing plate detachably connected to the box body. The cavity is provided in the box body, and the cavity is an open structure with one end open. The fixing plate cover is provided at the opening.

[0025] Optionally, the surface friction factor of the damping particles ranges from 0 to 1, the surface restitution coefficient of the damping particles ranges from 0 to 0.5, and the density of the damping particles ranges from 0.1 to 30 g / cm 3 .

[0026] Optionally, the filling rate of the damping particles includes: 10% or 30%.

[0027] An axle box comprises any one of the above-mentioned vibration damping devices for an axle box.

[0028] The vibration reduction device for an axle box provided by the present invention has the following beneficial effects:

[0029] In addition to the vibration-damping holes provided in the axle box, a vibration-damping box is further provided. The vibration-damping box is fitted to the surface of the axle box and is arranged around the outer periphery of the vibration-damping hole. That is, the vibration-damping box is arranged near the vibration-damping hole, so that the vibration-damping hole and the vibration-damping box form a superimposed vibration-damping effect, thereby achieving a better vibration-damping effect. In addition, damping particles are provided in the cavity of the vibration-damping box. In this way, during the operation of a rail vehicle containing the axle box, the damping particles in the cavity of the vibration-damping box can be used to increase structural damping, thereby consuming vibration energy, thereby reducing axle box vibration, especially facilitating the suppression of broadband vibration and reducing vibration transmission, thereby reducing vibration fatigue of the axle box, improving the service life of the axle box, and increasing the service life of the axle box.

[0030] The axle box provided by the present invention includes any one of the above-mentioned vibration damping devices for axle boxes, and has the same beneficial effects as the above-mentioned vibration damping devices for axle boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of an axle box including a vibration damping device for the axle box provided in a specific embodiment of the present invention;

[0033] Figure 2 A front view of a vibration damping device for an axle box provided in a specific embodiment of the present invention;

[0034] Figure 3 for Figure 2 Middle AA section view;

[0035] Figure 4 A front view of a vibration damping device for an axle box provided in another specific embodiment of the present invention;

[0036] Figure 5 A partially enlarged schematic diagram of the relationship between the cavity, the filling capsule, and the damping particles;

[0037] Figure 6 for Figure 1 The main view;

[0038] Figure 7 for Figure 6 Middle BB section view.

[0039] Reference numerals:

[0040] 1-axle box body; 11-axle box body; 111-rear cover; 12-front connecting part; 121-axle hole; 122-rubber cover; 123-support rubber pressure plate; 13-connecting plate; 131-vibration damping hole; 14-first reinforcing rib plate; 15-second reinforcing rib plate; 2-vibration damping box; 21-opening; 22-cavity; 23-box body; 24-fixing plate; 3-damping particles; 4-filling sac. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] The core of the present invention is to provide a vibration damping device for an axle box, which can reduce vibration fatigue of the axle box when applied to the axle box. Another core of the present invention is to provide an axle box including the above-mentioned vibration damping device for an axle box, which is not prone to vibration fatigue.

[0043] Please refer to Figure 1 、 Figure 2 and Figure 3 An embodiment of the present invention provides a vibration damping device for an axle box, including an axle box body 1, a vibration damping box 2 and damping particles 3. The axle box body 1 is provided with a vibration damping hole 131; the vibration damping box 2 is attached to the surface of the side of the axle box body 1 where the vibration damping hole 131 is opened, and the vibration damping box 2 is arranged around the outer periphery of the vibration damping hole 131. The vibration damping box 2 is provided with an opening 21 at a position corresponding to the vibration damping hole 131, and a cavity 22 is provided inside the vibration damping box 2; the damping particles 3 are filled in the cavity 22.

[0044] That is to say, in this embodiment, based on the vibration-damping hole 131 provided in the axle box body 1, a vibration-damping box 2 is further provided, so that the vibration-damping box 2 is attached to the surface of the axle box body 1 and is arranged around the outer periphery of the vibration-damping hole 131. That is, the vibration-damping box 2 is arranged near the vibration-damping hole 131, so that the vibration-damping hole 131 and the vibration-damping box 2 form a superimposed vibration-damping effect, thereby achieving a better vibration-damping effect. In addition, damping particles 3 are provided in the cavity 22 of the vibration-damping box 2. In this way, during the operation of the rail vehicle containing the axle box, the damping particles 3 in the cavity 22 of the vibration-damping box 2 can be used to increase the structural damping, play a role in consuming vibration energy, thereby reducing the vibration of the axle box, especially helping to suppress broadband vibration and reduce vibration transmission, thereby reducing the vibration fatigue of the axle box, improving the working life of the axle box, and increasing the service life of the axle box.

[0045] Further, to improve the vibration reduction effect, please refer to Figure 4 and Figure 5In some embodiments, the vibration damping device for the axle box further includes a filling capsule 4, in which the damping particles 3 are filled, and the filling capsule 4 is disposed within the cavity 22. In other words, in this embodiment, by adding the filling capsule 4, the damping particles 3 are first filled into the filling capsule 4, and then the filling capsule 4 is disposed within the cavity 22. By confining the damping particles 3 within the filling capsule 4, the frictional collision energy dissipation between the damping particles 3 is increased, thereby achieving a better vibration damping effect.

[0046] It should be noted that this embodiment does not limit the specific material of the filling capsule 4 , as long as the filling capsule 4 can be disposed in the cavity 22 and can be filled with the damping particles 3 .

[0047] In some embodiments, the filling capsule 4 includes an elastic film sleeve. That is, in this embodiment, the elastic film sleeve is used as the filling capsule 4. In this way, when the damping particles 3 rub and collide with the filling capsule 4, the elasticity of the film sleeve is beneficial to absorb vibration, thereby further improving the vibration reduction effect. Moreover, the structure of the film sleeve is relatively simple and easy to implement. Figure 5 As shown, the film sleeve can be a two-layer structure, that is, the film sleeve itself includes two layers of film bodies to improve structural reliability.

[0048] In addition, in order to further improve the vibration reduction effect, in some embodiments, the number of the cavity 22 is at least one, and each cavity 22 is provided with at least two filling bags 4.

[0049] That is, in this embodiment, the number of filling capsules 4 within a single cavity 22 is at least two. That is, the damping particles 3 within a single cavity 22 are divided into different filling capsules 4, allowing the damping particles 3 to be separated and filled within the cavity 22. The filling capsules 4 divide the damping particles 3 within a single cavity 22 into distinct damping particle 3 units, confining the damping particles 3 within each filling capsule 4. This further increases the frictional energy dissipation between the damping particles 3, resulting in a better vibration damping effect. Furthermore, the placement of different filling capsules 4 within the cavity 22 is equivalent to providing two or more elastomers within the cavity 22, creating secondary damping. Thus, frictional collisions between the different filling capsules 4 can further absorb and mitigate vibration, thereby enhancing the vibration effect.

[0050] In addition, in some embodiments, at least two filling capsules 4 are provided on the periphery of the vibration damping hole 131. That is, in this embodiment, different filling capsules 4 are provided at different positions around the vibration damping hole 131, so that there are multiple filling capsules 4 around the vibration damping hole 131. It can be understood that each filling capsule 4 is filled with damping particles 3, so that the damping particles 3 in each filling capsule 4 can be used to independently damp vibrations at multiple positions around the vibration damping hole 131, so that vibrations can be well damped in all directions of the periphery of the vibration damping hole 131, thereby improving the vibration damping effect. For example, Figure 4 As shown, in some embodiments, the vibration-damping hole 131 is an elliptical hole (the vibration-damping hole 131 corresponds to the opening 21 on the vibration-damping box 2), and filling capsules 4 are respectively provided on the upper side, lower side, left side and right side of the vibration-damping hole 131. Damping particles 3 are provided in the filling capsules 4 to respectively reduce vibration in the four directions of up, down, left and right of the vibration-damping hole 131. It should be noted that when the number of vibration-damping holes 131 is at least two, a filling capsule 4 can be set between the adjacent sides of any two adjacent vibration-damping holes 131, or more than two filling capsules 4 can be set. For example, the two adjacent vibration-damping holes 131 are called the first vibration-damping hole 131 and the second vibration-damping hole 131. The right side of the first vibration-damping hole 131 is adjacent to the left side of the second vibration-damping hole 131. Then, a common filling capsule 4 can be set between the right side of the first vibration-damping hole 131 and the left side of the second vibration-damping hole 131, or more than two filling capsules 4 can be set. When a common filling capsule 4 is set, the cavity 22 is close to the first vibration-damping hole 131 and the second vibration-damping hole 131 at the same time, so as to have a better vibration-damping effect on the vicinity of the first vibration-damping hole 131 and the second vibration-damping hole 131, respectively. Moreover, this setting method is convenient for processing and easy to implement.

[0051] In addition, it should be noted that the above embodiments do not limit the specific arrangement of the damping particles 3 in the cavity 22 , as long as the damping particles 3 are arranged in the cavity 22 .

[0052] In some embodiments, the damping particles 3 are arranged in a single-layer array within the cavity 22. That is, this embodiment, based on the size of the cavity 22 and the physical structure of the vibration damping box 2, limits the damping particles 3 to being arranged in a single-layer array within the cavity 22. This reduces the thickness and installation space of the vibration damping box 2, facilitating a reduction in the size of the axle box. This is particularly true for bogies with built-in axle boxes, where the installation space is relatively small. Therefore, this structural design helps save axle box space. Furthermore, this arrangement helps constrain the position of the damping particles 3, ensuring that they move only within a single layer of space. This, in turn, helps enhance the collision effect between different damping particles 3 and improves the vibration damping effect.

[0053] In addition, the above embodiments do not limit the specific structure of the axle box body. In some embodiments, the axle box body 1 includes an axle box body 11, a front connecting portion 12, a connecting plate 13, a first reinforcing rib plate 14 and a second reinforcing rib plate 15. The connecting plate 13 is connected between one side of the axle box body 11 and the front connecting portion 12, and the connecting plate 13 is arranged sideways. The first reinforcing rib plate 14 and the second reinforcing rib plate 15 are both connected between one side of the axle box body 11 and the front connecting portion 12. The first reinforcing rib plate 14 is perpendicular to the connecting plate 13 and is located at the upper end of the connecting plate 13. The second reinforcing rib plate 15 is perpendicular to the connecting plate 12 and is located at the lower end of the connecting plate 13. The first reinforcing rib plate 14 is arranged obliquely, and the second reinforcing rib plate 15 is horizontal. It is arranged flat, and the first reinforcing rib 14 is inclined from the end connected to the front connecting part 12 to the end connected to the shaft box body 11, gradually tilting in the direction away from the connecting plate 13; the width of the first reinforcing rib 14 and the second reinforcing rib 15 gradually increases from the end connected to the front connecting part 12 to the end connected to the shaft box body 11, and the connecting plate 13 is provided with a vibration-damping hole 131 running through its wall thickness, and vibration-damping boxes 2 are respectively provided on both sides of the connecting plate 13, and the vibration-damping boxes 2 on both sides of the connecting plate 13 are symmetrically arranged; a rear cover 111 is provided on the top of the shaft box body 11, the front connecting part 12 includes an axis hole 121, a rubber cover 122 is provided on the top of the front connecting part 12, and a supporting rubber pressure plate 123 is provided on the side of the front connecting part 12. That is to say, in this embodiment, the axle box body 11 and the front connecting part 12 are connected by the connecting plate 13, the first reinforcing rib plate 14 and the second reinforcing rib plate 15 to improve the reliability of the connection between the axle box body 11 and the front connecting part 12 and improve the connection strength; in addition, vibration damping boxes 2 are provided on the two side surfaces of the connecting plate 13 corresponding to the two ends of the vibration damping hole 131, so that the two vibration damping boxes 2 can be used to dampen the vibration of the axle box body 1 near the vibration damping hole 131, thereby improving the vibration damping effect; moreover, the two vibration damping boxes 2 are symmetrically arranged, which is conducive to improving the balance of the force on the vibration damping box 2 and further reducing the vibration of the axle box; the top and side of the front connecting part 12 are respectively provided with a rubber cover 122 and a supporting rubber pressure plate 123, which help to assist in the vibration reduction effect.

[0054] For further information, please refer to Figure 3In some embodiments, the vibration damping box 2 includes a box body 23 and a fixing plate 24 detachably connected to the box body 23. A cavity 22 is located within the box body 23, and the cavity 22 is open at one end. The fixing plate 24 covers the opening. Specifically, the cavity 22 is located within the box body 23. When the fixing plate 24 is not installed, one end of the cavity 22 is open, facilitating the filling of the damping particles 3 into the cavity 22 through this opening. After the damping particles 3 are filled, the fixing plate 24 is fixedly connected to the box body 23 to seal the cavity 22, confining the damping particles 3 within the cavity 22 and preventing them from escaping. Furthermore, the fixing plate 24 is detachably connected to the box body 23. During maintenance, the damping particles 3 within the cavity 22 can be replaced by removing the fixing plate 24. This solution avoids the need for drilling holes in the vibration damping box 2 to facilitate filling and replacement of the damping particles 3, thereby increasing the service life of the vibration damping box 2.

[0055] It should be noted that the present embodiment does not limit the specific connection method between the fixing plate 24 and the box body 23, as long as the two can be detachably connected. In some embodiments, the fixing plate 24 is threadedly connected to the box body 23. This connection method is simple and easy to implement.

[0056] In addition, this embodiment does not limit the specific materials of the fixing plate 24 and the box body 23. In some embodiments, the material of the fixing plate 24 includes carbon steel or fiberglass reinforced plastics, and the material of the box body 23 includes carbon steel or fiberglass reinforced plastics.

[0057] In addition, the above-mentioned embodiments do not limit the specific connection method between the vibration damping box 2 and the shaft box body 1, as long as the connection between the two can be achieved. In some embodiments, the vibration damping box 2 and the shaft box body 1 are connected by fasteners or welding or bonding, etc. In addition, in order to improve the service life of the shaft box body 1, in some embodiments, the shaft box body 1 is provided with a vibration sensor for detecting the vibration of the shaft box body 1, and the vibration sensor is connected to the controller to calculate the vibration condition of the shaft box body 1 according to the detection data of the vibration sensor, so that the user can adjust the damping particles 3 in the vibration damping box 2 according to the vibration condition of the shaft box body 1. In other words, this embodiment can adjust the vibration condition of the shaft box body 1 by timely adjusting the damping particles 3 in the vibration damping box 2 according to the real-time vibration condition of the shaft box body 1, so that the shaft box body 1 always works within a smaller vibration range, thereby improving the service life of the shaft box body 1.

[0058] In addition, the above embodiments do not specifically limit the outer surface of the damping particles 3 and the inner surface of the cavity 22. For example, the outer surface of the damping particles 3 can be smooth or rough; similarly, the inner surface of the cavity 22 can be smooth or rough.

[0059] To enhance the vibration damping effect, in some embodiments, the outer surfaces of the damping particles 3 and the inner surface of the cavity 22 are both roughened. It is understood that the provision of roughened surfaces can increase the frictional dissipation of vibration energy between the damping particles 3 and between the damping particles 3 and the inner surface of the cavity 22, thereby enhancing the vibration damping effect.

[0060] Considering the convenience of setting the rough surface, in some embodiments, the outer surface of the damping particles 3 and the inner surface of the cavity 22 are both provided with a patterned portion, so that the patterned portion forms a rough surface. This structure is easy to process. It should be noted that this embodiment does not limit the specific pattern structure of the patterned portion.

[0061] In addition, the above embodiments do not limit the parameters of the damping particles 3, as long as the damping particles 3 can be provided to increase the structural damping and consume the vibration energy.

[0062] In some embodiments, the surface friction factor of the damping particles 3 ranges from 0 to 1, the surface restitution coefficient of the damping particles 3 ranges from 0 to 0.5, and the density of the damping particles 3 ranges from 0.1 to 30 g / cm 3 The surface friction factor of the damping particles 3 includes a static friction factor and a kinetic friction factor. In this embodiment, both the static friction factor and the kinetic friction factor on the surface of the damping particles 3 range from 0 to 1. Furthermore, in some embodiments, the surface restitution coefficient of the damping particles 3 is 0.014, which exhibits a good vibration reduction effect.

[0063] In addition, the above embodiments do not specifically limit the particle size of the damping particles 3. In some embodiments, the particle size of the damping particles 3 is 0.5-2 mm.

[0064] In addition, the above embodiments do not specifically limit the filling rate of the damping particles 3 in the cavity 22. In some embodiments, the filling rate of the damping particles 3 in the cavity 22 ranges from 10% to 100%. For example, in some embodiments, the filling rate of the damping particles 3 in the cavity 22 is 10%, 30%, 50%, 80%, or 100%.

[0065] In addition, the above embodiments do not specifically limit the shape of the damping particles 3. In some embodiments, the damping particles 3 are polyhedrons, cones, ellipsoids or spheres, etc., wherein the polyhedrons include cuboids, cubes or other irregular polyhedrons.

[0066] In addition, the above embodiments do not specifically limit the material of the damping particles 3. The damping particles 3 may be made of one or more of a metal material, a non-metal material, a metal composite material, a non-metal composite material, and a polymer composite material. The metal material may include an iron-based alloy, a tungsten-based alloy, or an aluminum-based alloy, and the non-metallic material may be a ceramic material. In other words, the damping particles 3 may be ceramic particles.

[0067] In addition to the above-mentioned vibration damping device for an axle box, the present invention also provides an axle box including the vibration damping device for an axle box disclosed in the above-mentioned embodiment. For the structures of other parts of the axle box, please refer to the relevant technology and will not be described in detail herein.

[0068] The key point of this embodiment is that the vibration damping device for the axle box disclosed in any one of the above embodiments has the same beneficial effects as the above vibration damping device for the axle box, which will not be described in detail here.

[0069] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0070] 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.

[0071] The above is a detailed introduction to the vibration damping device for the axle box and the axle box provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A vibration damping device for an axle box, characterized in that: include: The axle box body (1) is provided with a vibration reduction hole (131); A vibration damping box (2) is attached to the surface of the side of the axle box body (1) where the vibration damping hole (131) is opened, and is arranged around the outer periphery of the vibration damping hole (131); the vibration damping box (2) is provided with an opening (21) at a position corresponding to the vibration damping hole (131); and a cavity (22) is provided inside the vibration damping box (2); Damping particles (3) are filled in the cavity (22); Also includes: A filling capsule (4), wherein the damping particles (3) are filled in the filling capsule (4), and the filling capsule (4) is arranged in the cavity (22); The axle box body comprises: The axle box body (11) has a rear cover (111) on the top; A front connecting portion (12) includes an axial hole (121), a top portion of which is provided with a rubber cover (122), and a side portion of the front connecting portion (12) is provided with a supporting rubber pressure plate (123); A connecting plate (13) is connected laterally between the axle box body (11) and the front connecting portion (12), and is provided with a vibration-damping hole (131) penetrating the wall thickness thereof. The vibration-damping boxes (2) are respectively provided on both sides of the connecting plate (13), and the vibration-damping boxes (2) on both sides of the connecting plate (13) are symmetrically arranged. A first reinforcing rib plate (14) is connected between the axle box body (11) and the front connecting portion (12), is located above the connecting plate (13), is perpendicular to the connecting plate (13), and is inclined from one end connected to the front connecting portion (12) to one end connected to the axle box body (11) in a direction gradually away from the connecting plate (13), and the width of the first reinforcing rib plate (14) gradually increases from one end connected to the front connecting portion (12) to one end connected to the axle box body (11); A second reinforcing rib plate (15) is connected between the axle box body (11) and the front connecting portion (12), is located below the connecting plate (13), is perpendicular to the connecting plate (13), is arranged horizontally, and has a width gradually increasing from the end connected to the front connecting portion (12) to the end connected to the axle box body (11); The vibration-damping box (2) includes a vibration-damping hole (131) and a fixing plate (24) detachably connected to the box body (23). The cavity (22) is provided in the box body (23), and the cavity (22) is an open structure with one end open. The fixing plate (24) is covered at the opening.

2. The vibration damping device for an axle box according to claim 1, characterized in that: The filling bag (4) comprises an elastic film sleeve.

3. The vibration damping device for an axle box according to claim 1, characterized in that: The number of the cavity (22) is at least one, and each cavity (22) is provided with at least two filling bags (4).

4. The vibration damping device for an axle box according to claim 3, characterized in that: At least two filling bags (4) are provided on the outer periphery of the vibration-damping hole (131).

5. The vibration damping device for an axle box according to any one of claims 1 to 4, characterized in that: The damping particles (3) are arranged in a single-layer array within the cavity (22).

6. The vibration damping device for an axle box according to any one of claims 1 to 4, characterized in that: The range of the surface friction factor of the damping particles (3) includes 0-1, the range of the surface restitution coefficient of the damping particles (3) includes 0-0.5, and the range of the density of the damping particles (3) includes 0.1-30 g / cm3.

7. The vibration damping device for an axle box according to any one of claims 1 to 4, characterized in that: The filling rate of the damping particles (3) includes: 10% or 30%.

8. An axle box, characterized in that: The vibration damping device for an axle box comprises the vibration damping device for an axle box according to any one of claims 1 to 7.

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