Wheel, bogie and rail vehicle

Abstract

The embodiment of the invention provides a wheel, a bogie and a railway vehicle. The wheel comprises a hub, a spoke and a wheel rim which are sequentially arranged from inside to outside. The hub and the wheel rim are made of a second type of metal; the spoke is made of a first type of metal alloy; an annular mounting groove or an annular convex part is arranged on the peripheral surface of the spoke; the density of the first metal alloy is smaller than that of the second metal; an annular mounting groove or an annular convex part is arranged on the inner circumferential surface of the wheel rim, the annular mounting groove and the annular convex part on the outer circumferential surface of the spoke correspond to the annular mounting groove and the annular convex part on the inner circumferential surface of the wheel rim, and the annular convex part is embedded into the annular mounting groove and used for axially limiting the spoke and the wheel rim. According to the wheel, the bogie and the railway vehicle provided by the embodiment of the invention, the problem of high difficulty in hot charging or press mounting of a traditional split type wheel can be solved, the weight of the wheel is relatively light, the lightweight design of the bogie is favorably realized, and the wheel rail noise is reduced.

Description

Technical Field

[0001] The present application relates to bogie running technology, and in particular to a wheel, a bogie and a rail vehicle. Background Art

[0002] Rail vehicles are an important link between cities, and have gradually become the main means of transportation in cities. Rail vehicles are also the main carrier for freight transportation. Rail vehicles mainly include: a car body and a bogie installed under the car body. The bogie is used to carry the car body and realize the running and steering functions.

[0003] Wheels are important parts of bogies. Traditional wheels are made of steel, which is heavy, causing greater wheel-rail wear and greater wheel-rail noise. Some wheels are integrally formed, while others are assembled from multiple parts into split wheels. Split wheels are usually assembled together by press-fitting or heat-fitting, which is difficult to install and has high requirements on the process. Summary of the invention

[0004] In order to solve one of the above-mentioned technical defects, a wheel, a bogie and a rail vehicle are provided in an embodiment of the present application.

[0005] According to a first aspect of an embodiment of the present application, there is provided a wheel, comprising: a hub, a spoke and a hoop arranged in sequence from the inside to the outside;

[0006] The hub is made of the second type of metal;

[0007] The wheel spokes are made of the first type of metal alloy; the outer peripheral surface of the wheel spokes is provided with an annular mounting groove or an annular convex portion;

[0008] The wheel hoop is made of the second type of metal; the density of the first type of metal alloy is less than that of the second type of metal; the inner circumference of the wheel hoop is provided with an annular mounting groove or an annular convex portion, the annular mounting grooves and annular convex portions on the outer circumference of the spoke and the inner circumference of the wheel hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the spoke and the wheel hoop.

[0009] According to a second aspect of an embodiment of the present application, there is provided a bogie comprising the wheels as described above.

[0010] According to a third aspect of an embodiment of the present application, there is provided a rail vehicle, comprising: a bogie as described above.

[0011] The technical solution provided in the embodiment of the present application is that the hub is made of the second type of metal; the spokes are made of the first type of metal alloy; the outer peripheral surface of the spokes is provided with an annular mounting groove or an annular convex portion; the hoop is made of the second type of metal; the density of the first type of metal alloy is less than the density of the second type of metal; the inner peripheral surface of the hoop is provided with an annular mounting groove or annular convex portion, and the annular mounting grooves and annular convex portions on the outer peripheral surface of the spokes and the inner peripheral surface of the hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the spokes and the hoop; the hub, the spokes and the hoop are assembled together as a split structure, which can solve the problem of the difficulty of hot-fitting or pressing of traditional split wheels. In addition, the density of the first type of metal alloy used in the spokes is less than the density of the second type of metal, so that the weight of the spokes is small, which is conducive to the lightweight design of the bogie and can reduce wheel-rail wear and wheel-rail noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 A cross-sectional view of a wheel provided in an embodiment of the present application;

[0014] Figure 2 An exploded view of a wheel provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the structure of the spokes in the wheel provided in the embodiment of the present application;

[0016] Figure 4 A schematic diagram of the structure of a wheel hub in a wheel provided in an embodiment of the present application;

[0017] Figure 5 A schematic diagram of the structure of a wheel hoop in a wheel provided in an embodiment of the present application.

[0018] Reference numerals:

[0019] 101-wheel hoop; 103-spoke; 104-hub; 105-annular convex portion; 106-annular mounting groove; 107-smooth groove; 108-smooth boss; 110-spoke plate; 111-outer connecting portion; 112-inner connecting portion; 113-center hole. DETAILED DESCRIPTION

[0020] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0021] This embodiment provides a wheel that can be used in a bogie of a rail vehicle. The wheel is a composite wheel.

[0022] like Figures 1 to 5 As shown, the wheel provided in this embodiment includes: a hub 104, spokes 103 and a wheel rim 101 which are arranged in sequence from the inside to the outside.

[0023] The spoke 103 is made of a first type of metal alloy, and a first axial limiting structure is disposed on an outer peripheral surface of the spoke 103 .

[0024] The wheel hub 104 is made of the second type of metal and has a central hole 113 for the axle to pass through.

[0025] The wheel hoop 101 is made of the second type of metal, and the inner circumference of the wheel hoop 101 is provided with a second axial limiting structure. The second axial limiting structure cooperates with the first axial limiting structure to axially limit the spoke and the wheel hoop to avoid relative movement and separation between the two in the axial direction, so as to improve the connection strength between the wheel hoop 101 and the spoke 103.

[0026] One implementation is: the first axial limiting structure is an annular mounting groove 106 provided on the outer circumference of the wheel spoke 103, and the second axial limiting structure is an annular convex portion 105 provided on the inner circumference of the wheel hoop 101, and the annular convex portion 105 can be sunk into the annular mounting groove 106 to achieve axial limiting. The wheel hoop 101 is sleeved on the outer circumference of the wheel spoke 103, and the annular convex portion 105 is embedded in the annular mounting groove 106, so that the wheel hoop 101 and the wheel spoke 103 can be positioned in the axial direction.

[0027] Alternatively, the first axial limiting structure is an annular protrusion 105 provided on the outer circumference of the spoke 103, and the second axial limiting structure is an annular mounting groove 106 provided on the inner circumference of the wheel rim 101, and the annular protrusion 105 can be sunk into the annular mounting groove 106 to achieve axial limiting.

[0028] The density of the first type of metal alloy is lower than that of the second type of metal. The spokes 103 are made of the first type of metal alloy, which has a lower density and a lighter weight, and is conducive to the lightweight design of the wheel and the bogie.

[0029] Furthermore, the hardness of the first metal alloy is less than that of the second metal, and the wheel rim 101 is made of the second metal and has a higher hardness, which can meet the requirements of long-term contact and friction with the rail. The wheel hub 104 is made of the second metal and has a higher hardness, which can meet the requirements of assembly and torque transmission between the axle and the wheel hub.

[0030] For example: the first type of metal alloy is aluminum alloy, and the second type of metal is steel. The wheel hoop 101 made of steel has high strength, so that the wheel maintains a preset shape and can withstand the pressure and friction between the rail. The spoke 103 made of aluminum alloy is light in weight and can achieve a lightweight design. The wheel hub 104 made of steel has high strength, can meet the requirements of press-fitting between the axle, and meet the requirements of transmitting torque and load between the axle. In addition, the first type of metal alloy can also be other materials, such as titanium alloy, magnesium alloy, etc. The second type of metal can also be other metals with higher hardness, such as iron, etc.

[0031] The wheel rim 101 and the wheel hub 104 are prefabricated, and the spokes 103 are formed in the area between the prefabricated wheel rim 101 and the wheel hub 104 through a liquid-solid forming process. Specifically, the prefabricated wheel rim 101 and the wheel hub 104 are placed in a mold, and then liquid first-type metal is injected into the mold. After the first-type metal solidifies, the spokes 103 are formed, and the spokes 103 are firmly assembled with the wheel rim 101 and the wheel hub 104. For example, the liquid-solid forming process can be implemented by liquid die forging technology.

[0032] When the wheel reaches its design life or is actually scrapped, the wheel can be sent to a recycling station to recover the aluminum alloy material of the spoke 103 and reuse it, thereby improving utilization and reducing resource waste.

[0033] Alternatively, the three separate structures of the wheel rim 101 , the spokes 104 and the wheel hub 104 may also be assembled together through other processes.

[0034] The technical solution provided in the embodiment of the present application is that the hub is made of the second type of metal; the spokes are made of the first type of metal alloy; the outer peripheral surface of the spokes is provided with an annular mounting groove or an annular convex portion; the hoop is made of the second type of metal; the density of the first type of metal alloy is less than the density of the second type of metal; the inner peripheral surface of the hoop is provided with an annular mounting groove or annular convex portion, and the annular mounting grooves and annular convex portions on the outer peripheral surface of the spokes and the inner peripheral surface of the hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the spokes and the hoop; the hub, the spokes and the hoop are assembled together as a split structure, which can solve the problem of the difficulty of hot-fitting or pressing of traditional split wheels. In addition, the density of the first type of metal alloy used in the spokes is less than the density of the second type of metal, so that the weight of the spokes is small, which is conducive to the lightweight design of the bogie and can reduce wheel-rail wear and wheel-rail noise.

[0035] Furthermore, the inner circumference of the spoke 103 is provided with a third axial limiting structure, and the outer circumference of the hub 104 is provided with a fourth axial limiting structure. The third axial limiting structure and the fourth axial limiting structure cooperate to axially limit the spoke and the hub to avoid relative movement and separation between the two in the axial direction, so as to improve the connection strength between the hub 104 and the spoke 103.

[0036] The third axial limiting structure may be an annular mounting groove 106 provided on the inner circumference of the wheel spoke 103, and the fourth axial limiting structure may be an annular convex portion 105 provided on the outer circumference of the wheel hub 104, and the annular convex portion 105 may be sunk into the annular mounting groove 106 to achieve axial limiting. The annular convex portion 105 of the wheel hub 104 is embedded in the annular mounting groove 106 on the inner circumference of the wheel spoke 103, so as to achieve axial positioning between the wheel hub 104 and the wheel spoke 103, and prevent the two from relative movement along the axial direction.

[0037] Alternatively, the third axial limiting structure may be an annular protrusion 105 provided on the inner circumference of the spoke 103 , and the fourth axial limiting structure may be an annular mounting groove 106 provided on the outer circumference of the hub 104 .

[0038] When the outer circumferential surface of the wheel spoke 103 is provided with an annular mounting groove 106, the annular mounting groove 106 is an annular groove and can be provided in the circumferential middle area of ​​the outer circumferential surface of the wheel spoke 103. Taking the structure shown in the figure as an example, on the basis of the above technical solution, in the axial direction of the wheel spoke 103, along the direction from the outer side to the inner side of the wheel spoke 103, the depth of the annular mounting groove 106 gradually increases. The shape of the annular protrusion 105 matches the shape of the annular mounting groove 106, that is, in the axial direction of the wheel hoop 101, along the direction from the outer side to the inner side of the wheel hoop 101, the height of the annular protrusion 105 gradually increases.

[0039] When the inner circumferential surface of the wheel rim 101 is provided with an annular mounting groove 106, the annular mounting groove 106 is an annular groove and can be provided in the circumferential middle area of ​​the wheel rim 101. Based on the above technical solution, in the axial direction of the wheel rim 101, along the direction from the outside to the inside of the wheel rim 101, the depth of the annular mounting groove 106 gradually increases. The shape of the annular protrusion 105 matches the shape of the annular mounting groove 106, that is, in the axial direction of the spoke 103, along the direction from the outside to the inside of the spoke 103, the height of the annular protrusion 105 gradually increases.

[0040] When the inner circumference of the wheel spoke 103 is provided with an annular mounting groove 106, the annular mounting groove 106 is an annular groove and can be provided in the circumferential middle area of ​​the inner circumference of the wheel spoke 103. Specifically, in the axial direction of the wheel spoke 103, the depth of the annular mounting groove 106 gradually increases along the direction from the outer side to the inner side of the wheel spoke 103. The shape of the annular protrusion 105 matches the shape of the annular mounting groove 106, that is, in the axial direction of the wheel hub 104, the height of the annular protrusion 105 gradually increases along the direction from the outer side to the inner side of the wheel hub 104.

[0041] When the outer peripheral surface of the wheel hub 104 is provided with an annular mounting groove 106, the annular mounting groove 106 is an annular groove and can be provided in the circumferential middle area of ​​the wheel hub 104. Based on the above technical solution, in the axial direction of the wheel hub 104, along the direction from the outer side to the inner side of the wheel hub 104, the depth of the annular mounting groove 106 gradually increases. The shape of the annular protrusion 105 matches the shape of the annular mounting groove 106, that is, in the axial direction of the spoke 103, along the direction from the outer side to the inner side of the spoke 103, the height of the annular protrusion 105 gradually increases.

[0042] On the basis of meeting the strength requirements of the wheel hoop 101 , the spoke 103 , and the wheel hub 104 , the deeper the depth of the annular mounting groove 106 , the better the axial limiting effect between the two components, and the better the connection strength between the two components.

[0043] Furthermore, the inner circumferential surface of the wheel rim 101 is provided with a second circumferential limiting structure, and the outer circumferential surface of the spoke 103 is provided with a first circumferential limiting structure. The first circumferential limiting structure and the second circumferential limiting structure cooperate to circumferentially limit the spoke 103 and the wheel rim 101 to prevent relative rotation between the two along the circumferential direction.

[0044] One implementation method is: the first circumferential limiting structure is a plurality of smooth bosses 108 arranged on the outer circumferential surface of the spoke 103, and the second circumferential limiting structure is a plurality of smooth grooves 107 arranged on the inner circumferential surface of the wheel rim 101. The smooth bosses 108 cooperate with the smooth grooves 107, and the smooth bosses 108 are embedded in the smooth grooves 107 to achieve circumferential limiting between the wheel rim 101 and the spoke 103.

[0045] Alternatively, the first circumferential limiting structure is a plurality of smooth grooves 107 arranged on the outer circumferential surface of the spoke 103 , and the second circumferential limiting structure is a plurality of smooth bosses 108 arranged on the inner circumferential surface of the wheel rim 101 .

[0046] The surface of the smooth groove 107 is a curved surface, and smoothly transitions with the inner circumference of the wheel rim 101. The surface of the smooth boss 108 is a curved surface, and smoothly transitions with the outer circumference of the wheel spoke 103.

[0047] Furthermore, the smooth grooves 107 are arranged at equal intervals along the circumferential direction, and the smooth grooves 107 correspond to the smooth bosses 108 one by one.

[0048] On the basis of the above technical solution, this embodiment provides an implementation of the spoke 103: the spoke 103 includes: an inner connecting portion 112, a spoke plate 110 and an outer connecting portion 111 which are integrally formed. The spoke plate 110 is arranged on the outer peripheral surface of the hub 104, and the extension direction of the spoke plate 110 is perpendicular to the axial direction of the hub 104. The outer connecting portion 111 is arranged at the outer end of the spoke plate 110 away from the hub 104, and the outer peripheral surface of the outer connecting portion 111 is provided with an annular mounting groove 106 for connecting with the wheel hoop 101. The inner connecting portion 112 is arranged at the inner end of the spoke plate 110, and the inner connecting portion 112 is provided with an annular mounting groove 106 for connecting with the hub 104.

[0049] The spokes 103, hub 104 and wheel rim 101 are manufactured by applying a novel liquid die forging technology to realize integrated forming and preparation, simplify the process flow, improve production efficiency, reduce manufacturing costs, and promote the economy of wheelset manufacturing, as well as driving safety and comfort.

[0050] This embodiment shows a scheme in which an annular mounting groove 106 is provided on the outer circumference of the spoke 103 and an annular protrusion 105 is provided on the inner circumference of the wheel rim 101. Through the cooperation of the annular mounting groove 106 and the annular protrusion 105, the interface between the wheel rim 101 and the spoke 103 is a "Y"-shaped design structure (such as Figure 1 Alternatively, the interface between the wheel rim 101 and the spoke 103 is a "T"-shaped design structure, that is, the top of the annular protrusion 105 is a plane, and the bottom of the annular mounting groove 106 is a plane.

[0051] In addition, this embodiment shows a scheme of setting an annular mounting groove 106 on the inner circumference of the spoke 103 and setting an annular convex portion 105 on the outer circumference of the hub 104. Through the cooperation of the annular mounting groove 106 and the annular convex portion 105, the interface between the hub 104 and the spoke 103 is a "Y"-shaped design structure, that is, the annular convex portion 105 is a pointed top, and the annular mounting groove 106 is a "V"-shaped groove, which can achieve axial fixation. Alternatively, the interface between the hub 104 and the spoke 103 is a "T"-shaped design structure, that is, the top of the annular convex portion 105 is a plane, and the bottom of the annular mounting groove 106 is a plane.

[0052] The outer circumference of the spoke 103 is evenly arranged with smooth bosses 108. In this embodiment, 9 smooth bosses 108 are evenly arranged along the circumference of the outer circumference of the spoke 103. The inner circumference of the wheel rim 101 is provided with the same number of smooth grooves 107, which correspond to the positions of the smooth bosses 108 to achieve circumferential fixation.

[0053] Alternatively, the inner circumference of the wheel rim 101 and the outer circumference of the wheel spoke 103 are matched with each other through interference fit, key groove or other structures.

[0054] Furthermore, a structure in which a boss and a groove cooperate with each other may be provided between the spoke 103 and the hub 104 to achieve circumferential positioning between the spoke 103 and the hub 104. For example, a third circumferential positioning structure is provided on the inner circumference of the spoke 103, and a fourth circumferential positioning structure is provided on the outer circumference of the hub 104. The third circumferential positioning structure cooperates with the fourth circumferential positioning structure to perform circumferential positioning of the spoke and the hub.

[0055] One implementation method is: the third circumferential limiting structure is a plurality of smooth bosses 108 arranged on the inner circumference of the spoke 103 (i.e., the inner circumference of the inner connecting portion 112), and the fourth circumferential limiting structure is a plurality of smooth grooves 107 arranged on the outer circumference of the hub 104, and the smooth bosses 108 are embedded in the smooth grooves 107 to achieve circumferential limiting between the hub 104 and the spoke 103, thereby preventing the two from rotating relative to each other along the circumferential direction.

[0056] Alternatively, the third circumferential limiting structure is a plurality of smooth grooves 107 arranged on the inner circumferential surface of the spoke 103 , and the fourth circumferential limiting structure is a plurality of smooth bosses 108 arranged on the outer circumferential surface of the hub 104 .

[0057] The surface of the smooth groove 107 is a curved surface, and smoothly transitions with the outer peripheral surface of the hub 104. The surface of the smooth boss 108 is a curved surface, and smoothly transitions with the inner peripheral surface of the spoke 103.

[0058] On the basis of the above technical solution, this embodiment also provides a bogie, comprising wheels provided by any of the above contents.

[0059] This embodiment also provides a rail vehicle, comprising the above-mentioned bogie.

[0060] The bogie and rail vehicle provided in this embodiment have the same technical effects as the above-mentioned wheels.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A wheel, characterized in that: include: The hub, spokes and wheel hoops are arranged in sequence from the inside to the outside; The hub is made of the second type of metal; The wheel spoke is made of the first type of metal alloy; the outer peripheral surface of the wheel spoke is provided with an annular mounting groove or an annular convex portion; The wheel hoop is made of the second type of metal; the density of the first type of metal alloy is less than that of the second type of metal; the inner circumference of the wheel hoop is provided with an annular mounting groove or an annular convex portion, the annular mounting grooves and annular convex portions on the outer circumference of the spoke and the inner circumference of the wheel hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the spoke and the wheel hoop.

2. The wheel according to claim 1, characterized in that The spokes are formed in the area between the prefabricated wheel rim and the hub by a liquid forming process.

3. The wheel according to claim 1 or 2, characterized in that: When the wheel spoke is provided with an annular installation groove, the depth of the annular installation groove gradually increases along the direction from the outer side to the inner side of the wheel spoke in the axial direction of the wheel spoke; When the inner circumferential surface of the wheel rim is provided with an annular installation groove, the depth of the annular installation groove gradually increases along the direction from the outer side to the inner side of the wheel rim in the axial direction of the wheel rim; The shape of the annular protrusion matches the shape of the annular mounting groove.

4. The wheel according to claim 3, characterized in that The wheel spoke comprises: an outer connecting portion, a spoke plate and an inner connecting portion which are integrally formed; the spoke plate is arranged on the outer peripheral surface of the wheel hub, and the extending direction of the spoke plate is perpendicular to the axial direction of the wheel hub; the outer connecting portion is located on the outer side of the spoke plate, and the inner connecting portion is located on the inner side of the spoke plate; the outer peripheral surface of the outer connecting portion is provided with an annular mounting groove or an annular protrusion.

5. The wheel according to claim 4, characterized in that The outer peripheral surface of the hub is provided with an annular mounting groove or an annular convex portion; The inner circumference of the inner connecting part of the spoke is provided with an annular mounting groove or an annular convex portion, and the annular mounting grooves and annular convex portions on the inner circumference of the spoke and the outer circumference of the hub are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the spoke and the hub.

6. The wheel according to claim 4, characterized in that The inner circumference of the wheel rim is provided with a plurality of smooth grooves or smooth bosses; the outer circumference of the wheel spoke is provided with a plurality of smooth grooves or smooth bosses, the smooth bosses and smooth grooves on the inner circumference of the wheel rim and the outer circumference of the wheel spoke are arranged correspondingly, and the smooth bosses can be embedded in the smooth grooves for circumferentially limiting the wheel spoke and the wheel rim.

7. The wheel according to claim 5, characterized in that When the inner circumferential surface of the wheel spoke 103 is provided with an annular installation groove, the depth of the annular installation groove gradually increases along the direction from the outer side to the inner side of the wheel spoke in the axial direction of the wheel spoke; When the outer peripheral surface of the wheel hub is provided with an annular mounting groove, the depth of the annular mounting groove gradually increases along the direction from the outer side to the inner side of the wheel hub in the axial direction of the wheel hub.

8. The wheel according to claim 1, characterized in that The first type of metal alloy has a hardness less than the second type of metal alloy.

9. The wheel according to claim 8, characterized in that The first type of metal alloy is aluminum alloy, and the second type of metal is steel.

10. A bogie, characterized in that: A wheel comprising any one of claims 1-9.

11. A rail vehicle, characterized in that: include: The bogie as claimed in claim 10.

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