Wheel set structure of railway vehicle, bogie and railway vehicle

Abstract

The utility model relates to the technical field of railway vehicles, in particular to a wheel set structure of a railway vehicle, a bogie and the railway vehicle, the wheel set structure of the railway vehicle comprises an axle, the axle comprises a connection section and installation sections connected to the two ends of the connection section respectively, and the outer diameter of the end of the connection section is larger than that of the installation sections. A first bulge is formed in the circumferential direction of the connecting section; the wheel sleeves the outer side of the mounting section; the first gland is arranged between the wheel and the axle in a sleeved mode, one side of the first gland is connected with the wheel, the other side of the first gland is provided with a notch matched with the first protrusion, and the notch abuts against the first protrusion. When the first gland is installed on the wheel and the axle, the first gland can be directly positioned on the axle, then the wheel, the gland and the axle are mutually limited, bolt connection is not needed, installation is more convenient and faster, the end structure of the axle is optimized, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicles, in particular to a wheel set structure, a bogie and a rail vehicle of a rail vehicle. Background Art

[0002] The traditional wheel set uses interference fit to compress the wheel, and uses the axle box and gland method to achieve sealing. When the gland is connected to the wheel, it is usually installed and fixed by bolts, which is not conducive to the positioning of the wheel and the gland. Moreover, when the external shape structure of the axle changes due to design needs, the positioning and installation of the gland and the wheel will also be affected, and the adaptability is poor. Summary of the Utility Model

[0003] The utility model provides a wheel set structure, a bogie and a rail vehicle of a rail vehicle, so as to solve one of the defects in the prior art, enabling the first gland to be directly positioned on the axle when installed on the wheel and the axle, thereby enabling mutual limitation among the wheel, the gland and the axle, without the need for bolt connection, making the installation more convenient, optimizing the end structure of the axle and reducing the installation difficulty.

[0004] The utility model provides a wheel set structure of a rail vehicle, including:

[0005] An axle, the axle includes a connecting section and installation sections respectively connected to both ends of the connecting section, and the outer diameter of the end of the connecting section is greater than the outer diameter of the installation section to form a first protrusion in the circumferential direction of the connecting section;

[0006] A wheel, the wheel is sleeved outside the installation section;

[0007] A first gland, the first gland is sleeved between the wheel and the axle, one side of the first gland is connected to the wheel, and the other side is provided with a notch adapted to the first protrusion, and the notch abuts against the first protrusion.

[0008] According to the wheel set structure of a rail vehicle provided by the utility model, a first sealing part is arranged on the inner side of one end of the wheel close to the connecting section, a second sealing part is arranged on one side of the first gland close to the wheel, and the first sealing part and the second sealing part are hermetically connected in cooperation.

[0009] According to the wheel set structure of a rail vehicle provided by the utility model, the first sealing part and the second sealing part form a labyrinth sealing structure.

[0010] According to a wheel set structure of a rail vehicle provided by the present utility model, a first sealing portion is formed by the end face of the wheel facing the connecting section and recessing inward along the axial direction of the wheel. The longitudinal cross-sectional shape of the first sealing portion along the radial direction of the wheel is an S shape, and the first sealing portion is sealingly connected to the second sealing portion on the surface parallel to the axial direction of the wheel.

[0011] According to a wheel set structure of a rail vehicle provided by the present utility model, the first gland is provided with a second protrusion on the end face facing the connecting section. The inner side surface of the second protrusion and the end face of the first gland inside it form the notch, and the end face of the first gland outside the second protrusion is flush with the end face of the wheel.

[0012] According to a wheel set structure of a rail vehicle provided by the present utility model, the connecting section is provided with a boss at the position corresponding to the frame. The upper surface of the boss is provided with a plane, and the plane is suitable for supporting and fixing the leaf spring on the frame; the side surface of the first protrusion away from the wheel is connected to the boss.

[0013] According to a wheel set structure of a rail vehicle provided by the present utility model, the axle includes:

[0014] A core shaft;

[0015] A bushing, the bushing is sleeved outside the core shaft. The bushing includes the connecting section and the mounting section. The connecting section is provided with a mounting seat at the position corresponding to the motor, and the mounting seat is suitable for connecting with the outer shell of the motor; the connecting section is further provided with a connecting seat, and the connecting seat is suitable for connecting the connecting rod of the primary suspension device.

[0016] According to a wheel set structure of a rail vehicle provided by the present utility model, the wheel set structure further includes:

[0017] An end cover, the end cover is provided with a through hole, the end of the core shaft is inserted into the through hole, and the hole wall of the through hole is spline-connected to the outer wall of the end of the core shaft. The end cover is connected to the wheel;

[0018] A second gland, the second gland is arranged between the end cover and the wheel. The second gland is connected to the end cover through a labyrinth seal structure, and the second gland is fixedly connected to the bushing.

[0019] The present utility model further provides a bogie, including a frame, a motor and the wheel set structure of the rail vehicle as described above. The frame is arranged above the wheel set structure, the leaf spring of the frame is installed on the boss, and the housing of the motor is connected to the mounting seat.

[0020] The present utility model further provides a rail vehicle, including the wheel set structure of the rail vehicle as described above or the bogie as described above.

[0021] The wheel set structure of the rail vehicle provided by the present utility model, the axle mainly includes a connecting section and two mounting sections. The two mounting sections are coaxially connected to both ends of the connecting section respectively. The wheels are mounted on the connecting section, and the wheels can rotate self - driven by the axle, that is, wheels are mounted at both ends of the axle respectively. The first gland is a component required for mounting the wheels on the axle. The outer diameter of the end of the connecting section is greater than the outer diameter of the mounting section, so that the axle forms a stepped - shaft form. The end of the connecting section protrudes outwards compared with the mounting section to form a first protrusion. The first gland is arranged between the inner side of the wheel and the outer side of the axle. The first gland is provided with a notch at a position close to the connecting section. The shape of the notch matches the first protrusion and abuts against the first protrusion. The outer side of the first gland is connected to the wheel, thereby realizing the positioning of the wheel on the axle.

[0022] In this embodiment, the structures of the axle and the first gland are improved. Through the cooperation of the first protrusion and the notch, when the first gland is mounted on the wheel and the axle, the first gland can be directly positioned on the axle, and then the wheel, the gland and the axle are mutually limited. There is no need to use bolt connection, the installation is more convenient, the end structure of the axle is optimized, and the installation difficulty is reduced. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is one of the structural schematic diagrams of the wheel set structure of the rail vehicle provided by the embodiment of the present utility model;

[0025] Figure 2 is the second structural schematic diagram of the wheel set structure of the rail vehicle provided by the embodiment of the present utility model;

[0026] Figure 3 is Figure 1 the enlarged view of the partial A of

[0027] Figure 4 is the partial exploded view of the bogie provided by the embodiment of the present utility model.

[0028] Reference Signs:

[0029] 100, axle; 110, connecting section; 120, mounting section; 130, first protrusion; 140, boss; 150, mandrel; 160, bushing; 170, mounting seat; 180, connecting seat;

[0030] 200, Wheel; 210, First sealing part;

[0031] 300, First gland; 310, Notch; 320, Second sealing part; 330, Second protrusion;

[0032] 400, End cover; 410, Through hole; 420, Spline;

[0033] 500, Second gland;

[0034] 600, Motor; 610, Node;

[0035] 700, Frame; 710, Leaf spring;

[0036] 800, Connecting rod; 900, Gearbox. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0038] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the wheel set structure of the rail vehicle provided by the embodiment of the present utility model includes an axle 100, a wheel 200 and a first gland 300. The axle 100 includes a connecting section 110 and mounting sections 120 respectively connected to both ends of the connecting section 110. The outer diameter of the end of the connecting section 110 is greater than the outer diameter of the mounting section 120 to form a first protrusion 130 in the circumferential direction of the connecting section 110; the wheel 200 is sleeved outside the mounting section 120; the first gland 300 is sleeved between the wheel 200 and the axle 100. One side of the first gland 300 is connected to the wheel 200, and a notch 310 adapted to the first protrusion 130 is provided on the other side, and the notch 310 abuts against the first protrusion 130.

[0039] The wheel set structure of the rail vehicle according to the embodiment of the present utility model, the axle 100 mainly includes a connecting section 110 and two mounting sections 120. The two mounting sections 120 are coaxially connected to both ends of the connecting section 110 respectively. The wheel 200 is mounted on the connecting section 110. Driven by the axle 100, the wheel 200 can rotate. That is, the wheels 200 are respectively mounted at both ends of the axle 100. The first gland 300 is a component required for mounting the wheel 200 on the axle 100. The outer diameter of the end of the connecting section 110 is greater than the outer diameter of the mounting section 120, so that the axle 100 forms a stepped shaft form. The end of the connecting section 110 protrudes outward compared with the mounting section 120 to form a first protrusion 130. The first gland 300 is arranged between the inner side of the wheel 200 and the outer side of the axle 100. The first gland 300 is provided with a notch 310 at a position close to the connecting section 110. The shape of the notch 310 matches the first protrusion 130 and abuts against the first protrusion 130. The outer side of the first gland 300 is connected to the wheel 200, thereby realizing the positioning of the wheel 200 on the axle 100.

[0040] In this embodiment, the structures of the axle 100 and the first gland 300 are improved. Through the cooperation of the first protrusion 130 and the notch 310, when the first gland 300 is mounted on the wheel 200 and the axle 100, the first gland 300 can be directly positioned on the axle 100, and then the wheel 200, the gland and the axle 100 are mutually limited. There is no need to use bolt connection, the installation is more convenient, the end structure of the axle 100 is optimized, and the installation difficulty is reduced.

[0041] According to an embodiment provided by the present utility model, a first sealing portion 210 is provided on the inner side of one end of the wheel 200 close to the connecting section 110, and a second sealing portion 320 is provided on the side of the first gland 300 close to the wheel 200. The first sealing portion 210 and the second sealing portion 320 are cooperatively and sealingly connected. In this embodiment, the connection between the wheel 200 and the first gland 300 is realized through the sealing portion, that is, the connection between the wheel 200 and the first gland 300 belongs to a sealed connection.

[0042] The inner side of the wheel 200 has a shaft hole. An inner protective bearing and an outer protective bearing are arranged in the shaft hole of the wheel 200. The inner protective bearing is close to the connecting section 110, and the outer protective bearing is far from the connecting section 110. Thus, the wheel 200 together with the inner protective bearing and the outer protective bearing are sleeved and mounted on the mounting section 120. The first sealing portion 210 is arranged at a position of the shaft hole of the wheel 200 close to the connecting section 110. The first gland 300 also has a shaft hole. The mounting section 120 of the axle 100 passes through the shaft hole of the first gland 300. The second sealing portion 320 is arranged on the circumferential outer side of the first gland 300. The second sealing portion 320 and the first sealing portion 210 are cooperatively connected to form a sealed connection effect.

[0043] Thus, when the wheel 200 and the first gland 300 are installed on the axle 100, the first gland 300 can directly seal the wheel 200, seal the space inside the shaft hole of the wheel 200 at the end where the first gland 300 is located, ensure the installation requirements of each bearing inside the shaft hole, and there is no need to add other sealing components, further improving the sealing effect. The first gland 300 is integrated with a second sealing portion 320 for sealing the wheel 200 and a notch 310 for positioning and installation. At the same time, in cooperation with the first sealing portion 210 of the wheel 200 and the first protrusion 130 of the axle 100, the overall positioning and installation and sealing effects are achieved.

[0044] According to an embodiment provided by the present invention, the first sealing portion 210 and the second sealing portion 320 form a labyrinth sealing structure. In this embodiment, the sealing connection structure formed by the first sealing portion 210 and the second sealing portion 320 is selected as a labyrinth sealing type. The labyrinth sealing structure can not only achieve a good sealing effect but also meet good connection requirements.

[0045] In this embodiment, both the first sealing portion 210 and the second sealing portion 320 can be structures formed by right-angled bending surfaces, and positioning connection and sealing can be achieved by using multiple bending surfaces. The bending surface of the first sealing portion 210 forming the labyrinth sealing structure can be located on the end face of the wheel 200. Correspondingly, the bending surface of the second sealing portion 320 forming the labyrinth sealing structure can be located on the end face of the first gland 300. At this time, the labyrinth sealing structure extends along the radial direction of the wheel 200; the bending surface of the first sealing portion 210 forming the labyrinth sealing structure can also be located on the inner wall of the shaft hole of the wheel 200. Correspondingly, the bending surface of the second sealing portion 320 forming the labyrinth sealing structure can also be located on the outer peripheral surface of the first gland 300. At this time, the labyrinth sealing structure extends along the axial direction of the wheel 200.

[0046] According to an embodiment provided by the present invention, the first sealing portion 210 is formed by the end face of the wheel 200 facing the connecting section 110 and recessing inward along the axial direction of the wheel 200. The longitudinal cross-sectional shape of the first sealing portion 210 along the radial direction of the wheel 200 is S-shaped, and the first sealing portion 210 and the second sealing portion 320 are sealingly connected on the surface parallel to the axial direction of the wheel 200.

[0047] In this embodiment, the bending surface of the first sealing portion 210 that forms the labyrinth sealing structure may be located at the end face of the wheel 200. Correspondingly, the bending surface of the second sealing portion 320 that forms the labyrinth sealing structure may be located at the end face of the first gland 300. At this time, the labyrinth sealing structure extends along the radial direction of the wheel 200. The bending surface cooperates with the sealing ring to form the sealing portion. To ensure the sealing effect, the sealing ring is arranged on the surface parallel to the axial direction of the wheel 200 in the bending surface. Compared with being arranged on the surface perpendicular to the axial direction of the wheel 200 in the bending surface, the setting position of the sealing ring can better ensure the stability of the sealing ring and the pressing degree between the first sealing portion 210 and the second sealing portion 320. Moreover, when the labyrinth sealing structure extends along the radial direction of the wheel 200, it can meet the installation requirements of the wheel set. The first sealing portion 210 and the second sealing portion 320 can be cooperatively connected by insertion along the axial direction of the wheel 200.

[0048] According to an embodiment provided by the present utility model, the first gland 300 is provided with a second protrusion 330 on the end face facing the connecting section 110. The inner side surface of the second protrusion 330 and the end face of the first gland 300 inside it form a notch 310. The end face of the first gland 300 outside the second protrusion 330 is flush with the end face of the wheel 200.

[0049] In this embodiment, the first gland 300 is provided with a second protrusion 330. The second protrusion 330 is located on the end face of the first gland 300 and is annular. The end face of the first gland 300 is sequentially divided into a first end face portion and a second end face portion from the inside to the outside along the radial direction of the first gland 300. The first end face portion and the inner side surface of the second protrusion 330 form a notch 310. Thus, the inner side surface of the second protrusion 330 abuts against the outer peripheral surface of the first protrusion 130, and the first end face portion abuts against the end face of the first protrusion 130. The second end face portion is flush with the end face of the wheel 200 facing the connecting section 110. Thus, the effect of compacting the installation structure of the axle 100 and the wheel 200 is achieved.

[0050] In other embodiments, the notch 310 can also be directly formed as an inwardly concave notch 310 at the intersection position of the axial hole and the end face of the first gland 300.

[0051] According to an embodiment provided by the present utility model, a boss 140 is provided at the position of the connection section 110 corresponding to the frame 700. The upper surface of the boss 140 is provided with a flat surface, and the flat surface is suitable for supporting and fixing the leaf spring 710 on the frame 700. In this embodiment, the frame 700 is arranged above the wheel set structure. The frame 700 can connect the wheel set structure with the vehicle body, and shock absorption structures, motors 600, etc. are arranged thereon. Corresponding installation bases need to be provided at the ends of the leaf springs 710 on the frame 700. Therefore, the boss 140 is provided on the connection section 110 of the axle 100. The position of the boss 140 facing the frame 700 is the upper surface. To ensure the stable installation of the leaf spring 710, the upper surface of the boss 140 is set in the form of a flat surface to form a displacement platform. It is proved by simulation that the load of the displacement platform is more uniform and the stress area is larger.

[0052] According to an embodiment provided by the present utility model, the side surface of the first protrusion 130 away from the wheel 200 is connected to the boss 140. In this embodiment, the boss 140 is a partial structure and is not arranged circumferentially around the axle 100. To ensure the position of the boss 140 and the force dispersion and balance effect, the boss 140 is arranged at a position close to the first protrusion 130 and is in an integrally connected state with the first protrusion 130. However, in the longitudinal section direction of the axle 100, the flat surface of the boss 140 is higher than the first protrusion 130.

[0053] According to an embodiment provided by the present utility model, the axle 100 includes a core shaft 150 and a sleeve 160. The sleeve 160 is sleeved outside the core axis. The sleeve 160 includes a connection section 110 and an installation section 120. An installation seat 170 is provided at the position of the connection section 110 corresponding to the motor 600, and the installation seat 170 is suitable for connecting with the outer shell of the motor 600.

[0054] In this embodiment, the axle 100 is composed of a core shaft 150 rotating and a sleeve 160 bearing mode. The overall shape of the sleeve 160 is such that the cross-sectional area gradually increases along the axial direction. The connection section 110 and the installation section 120 are embodied in the sleeve 160, that is, the two ends of the sleeve 160 are the installation sections 120, and the wheels 200 are arranged on the installation sections 120. The connection section 110 of the sleeve 160 is between the two installation sections 120. The gearbox 900 is arranged on the axle 100, and the outer shell of the gearbox 900 is integrated with the sleeve 160. Thus, the part of the sleeve 160 from the installation section 120 far from the gearbox 900 to the connection section 110 reaching the position of the gearbox 900 is in a flared shape. A boss 140 is provided at one end of the connection section 110, and the other end is the outer shell of the gearbox 900. An installation seat 170 is formed between the boss 140 and the outer shell of the gearbox 900, and the installation seat 170 and the outer shell of the motor 600 are connected by a node 610.

[0055] In this embodiment, there are a total of four mounting seats 170, two of which are located at the upper part of the bushing 160, and the other two are located at the lower part of the bushing 160, and they are evenly distributed opposite to each other. There are also two bosses 140, which are located at both ends of the connecting section 110 on the outside of the mounting seat 170. In this way, the bearing surfaces of each connection and support position are dispersed through the bushing 160 of the axle 100, ensuring the structural strength while balancing the stress.

[0056] According to an embodiment provided by the present invention, the wheel set structure further includes an end cover 400 and a second gland 500. The end cover 400 is provided with a through hole 410, and the end of the mandrel 150 is inserted into the through hole 410. The hole wall of the through hole 410 is connected to the outer wall spline 420 of the end of the mandrel 150, and the end cover 400 is connected to the wheel 200; the second gland 500 is arranged between the end cover 400 and the wheel 200, and the second gland 500 is connected to the end cover 400 through a labyrinth seal structure, and the second gland 500 is fixedly connected to the bushing 160.

[0057] In this embodiment, the first gland 300 and the second gland 500 are respectively located on both sides of the wheel 200. Therefore, the first gland 300 is the rear gland, and the second gland 500 is the front gland, so as to seal both ends of the axle hole of the wheel 200. An end cover 400 is also arranged outside the second gland 500 to encapsulate the entire wheel set structure.

[0058] The outer periphery of the end cover 400 is fixedly connected to the wheel 200, and the middle through hole 410 of the end cover 400 is connected to the mandrel 150 through splines 420. That is to say, the mandrel 150 sequentially passes through the first gland 300, the wheel 200, the second gland 500, and finally inserts into the through hole 410 of the end cover 400. The end cover 400 is hermetically connected to the second gland 500, and the connection part is also a labyrinth seal structure, which is the same as the composition form of the first seal part 210 and the second seal part 320. The second gland 500 is fixedly connected to the bushing 160. Thus, the end cover 400 integrally connects the mandrel 150, the wheel 200, the second gland 500, and the bushing 160, strengthening the integrity of the wheel set structure.

[0059] During the installation process, first push the first gland 300 to the outside of the bushing 160 until the notch 310 abuts against the first protrusion 130, then push the wheel 200 to the outside of the bushing 160 until the first seal part 210 is connected to the second seal part 320, then push the second gland 500 to the outside of the bushing 160, connect the second gland 500 to the bushing 160 through bolts, and finally push the end cover 400 onto the mandrel 150 until the end cover 400 is hermetically connected to the second gland 500. At this time, the splines 420 cooperate to fix the end cover 400 and the mandrel 150, and the end cover 400 is fixedly connected to the wheel 200 through bolts.

[0060] According to an embodiment provided by the present utility model, the connecting section 110 is further provided with a connecting seat 180, and the connecting seat 180 is adapted to connect a connecting rod 800 of a suspension device.

[0061] The bogie provided by the present utility model will be described below. The bogie described below can be correspondingly referred to the wheel set structure of the rail vehicle described above.

[0062] An embodiment of the present utility model further provides a bogie, which includes a frame 700, a motor 600, and the wheel set structure of the rail vehicle as described in the above embodiment. The frame 700 is disposed above the wheel set structure, the leaf spring 710 of the frame 700 is installed on the boss 140, and the housing of the motor 600 is connected to the mounting seat 170.

[0063] The rail vehicle provided by the present utility model will be described below. The rail vehicle described below can be correspondingly referred to the bogie and the wheel set structure of the rail vehicle described above.

[0064] An embodiment of the present utility model further provides a rail vehicle, which includes the wheel set structure of the rail vehicle as described in the above embodiment or the bogie as described in the above embodiment.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A wheelset structure for a rail vehicle, characterized in that: include: An axle, the axle comprising a connecting section and mounting sections respectively connected to both ends of the connecting section, the outer diameter of the end of the connecting section being larger than the outer diameter of the mounting section, so as to form a first protrusion in the circumferential direction of the connecting section; A wheel, wherein the wheel is sleeved on the outside of the mounting section; A first pressure cover is sleeved between the wheel and the axle, one side of the first pressure cover is connected to the wheel, and the other side is provided with a notch adapted to the first protrusion, and the notch abuts against the first protrusion.

2. The wheelset structure of a rail vehicle according to claim 1, characterized in that: A first sealing portion is provided on the inner side of one end of the wheel close to the connecting section, and a second sealing portion is provided on the side of the first gland close to the wheel. The first sealing portion cooperates with the second sealing portion to be sealed and connected.

3. The wheelset structure of a rail vehicle according to claim 2, characterized in that: The first sealing portion and the second sealing portion form a labyrinth sealing structure.

4. The wheelset structure of a rail vehicle according to claim 3, characterized in that: The wheel is formed by an end face facing the connecting section which is recessed inwardly along the axial direction of the wheel to form the first sealing portion, the longitudinal cross-section of the first sealing portion along the radial direction of the wheel is S-shaped, and the first sealing portion is sealingly connected to the second sealing portion on a surface parallel to the axial direction of the wheel.

5. The wheelset structure of a rail vehicle according to claim 1, characterized in that: The first gland is provided with a second protrusion on the end face facing the connecting section, the inner side face of the second protrusion and the end face of the first gland inside it form the notch, and the end face of the first gland outside the second protrusion is flush with the end face of the wheel.

6. The wheelset structure of a rail vehicle according to any one of claims 1 to 5, characterized in that: The connecting section is provided with a boss at a position corresponding to the frame, and a plane is provided on the upper surface of the boss, and the plane is suitable for supporting the leaf spring on the fixed frame; the first protrusion is connected to the boss at a side away from the wheel.

7. The wheelset structure of a rail vehicle according to claim 6, characterized in that: The axle comprises: Mandrel; A shaft sleeve, wherein the shaft sleeve is sleeved on the outside of the shaft core, and the shaft sleeve comprises the connecting section and the mounting section. The connecting section is provided with a mounting seat at a position corresponding to the motor, and the mounting seat is suitable for connecting to the housing of the motor; the connecting section is also provided with a connecting seat, and the connecting seat is suitable for connecting a connecting rod of a suspension device.

8. The wheelset structure of a rail vehicle according to claim 7, characterized in that: The wheelset structure further comprises: An end cover, wherein the end cover is provided with a through hole, the end of the mandrel is inserted into the through hole, the hole wall of the through hole is spline-connected with the outer wall of the end of the mandrel, and the end cover is connected to the wheel; A second gland, wherein the second gland is disposed between the end cover and the wheel, the second gland is connected to the end cover via a labyrinth seal structure, and the second gland is fixedly connected to the shaft sleeve.

9. A bogie, characterized in that: It comprises a frame, a motor and a wheelset structure of a rail vehicle as described in claim 7 or 8, wherein the frame is arranged above the wheelset structure, the leaf spring of the frame is mounted on the boss, and the housing of the motor is connected to the mounting seat.

10. A rail vehicle, characterized in that: A wheelset structure for a rail vehicle comprising any one of claims 1 to 8 or a bogie according to claim 9.

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