Wheel, bogie and rail vehicle

Abstract

The embodiment of the invention provides a wheel, a bogie and a railway vehicle, and the wheel comprises a wheel core which is made of a first metal alloy; an annular mounting groove or an annular convex part is arranged on the peripheral surface of the wheel core; the wheel rim is made of a second type of metal; 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 grooves and the annular convex parts on the outer circumferential surface of the wheel core and the inner circumferential surface of the wheel rim are correspondingly arranged; and the annular convex parts are embedded into the annular mounting grooves and are used for axially limiting the wheel core 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:

[0006] The wheel core is made of the first type of metal alloy; the outer peripheral surface of the wheel core is provided with an annular mounting groove or an annular convex portion;

[0007] 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 wheel core and the inner circumference of the wheel hoop are correspondingly arranged, and the annular convex portion is embedded in the annular mounting groove for axially limiting the wheel core and the wheel hoop.

[0008] According to a second aspect of an embodiment of the present application, there is provided a bogie comprising the wheels as described above.

[0009] According to a third aspect of an embodiment of the present application, there is provided a rail vehicle, comprising: a bogie as described above.

[0010] The technical solution provided in the embodiment of the present application is that the wheel core is made of a first type of metal alloy; the outer peripheral surface of the wheel core is provided with an annular mounting groove or an annular convex portion; the wheel hoop is made of a 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 wheel hoop is provided with an annular mounting groove or an annular convex portion; the annular mounting groove and the annular convex portion on the outer peripheral surface of the wheel core and the inner peripheral surface of the wheel hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the wheel core and the wheel hoop. This process can solve the problem of difficulty in hot-fitting or pressing of traditional split wheels. In addition, the density of the first type of metal alloy is less than the density of the second type of metal, so that the strength of the wheel hoop can meet the requirements of contacting with the rail to transfer load, and the weight of the wheel core is relatively small, which is conducive to realizing the lightweight design of the bogie, and can reduce wheel-rail wear and wheel-rail noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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:

[0012] Figure 1 A cross-sectional view of a wheel provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of the structure of a wheel core in a wheel provided in an embodiment of the present application;

[0014] Figure 3 A schematic diagram of the structure of a wheel hoop in a wheel provided in an embodiment of the present application.

[0015] Reference numerals:

[0016] 101-wheel hoop; 102-wheel core; 105-annular convex portion; 106-annular mounting groove; 107-smooth groove; 108-smooth boss; 109-center portion; 110-spoke plate; 111-connecting portion; 113-center hole. DETAILED DESCRIPTION

[0017] 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.

[0018] This embodiment provides a wheel that can be used in a bogie of a rail vehicle. The wheel is a composite wheel.

[0019] like Figures 1 to 3As shown, the wheel provided in this embodiment includes a wheel rim 101 and a wheel core 102 .

[0020] The wheel core 102 is made of a first type of metal alloy, and a first axial limiting structure is disposed on an outer peripheral surface of the wheel core 102 .

[0021] 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 wheel core 102 and the wheel hoop 101 to avoid relative movement and separation between the two along the axial direction, so as to improve the connection strength between the wheel hoop 101 and the wheel core 102.

[0022] One implementation is: the first axial limiting structure is an annular mounting groove 106 provided on the outer circumference of the wheel core 102, 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 core 102, and the annular convex portion 105 is embedded in the annular mounting groove 106, so that the wheel hoop 101 and the wheel core 102 can be positioned in the axial direction.

[0023] Another embodiment is: the first axial limiting structure is an annular mounting groove 106 arranged on the inner circumference of the wheel hoop 101, and the second axial limiting structure is an annular protrusion 105 arranged on the outer circumference of the wheel core 102. The annular protrusion 105 can be sunk into the annular mounting groove 106 to achieve axial limiting.

[0024] The wheel core 102 is made of the first type of metal alloy, which has a low density and a light weight, and is conducive to the lightweight design of the wheel and the bogie. Furthermore, the hardness of the first type of metal alloy is less than that of the second type of metal, and the wheel rim 101 is made of the second type of metal, which has a high hardness and can meet the requirements of long-term contact and friction with the rail.

[0025] For example: the first type of metal alloy is aluminum alloy, and the second type of metal is steel. The wheel rim 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 wheel core 102 made of aluminum alloy is light in weight and can achieve a lightweight design. 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.

[0026] The wheel rim 101 is prefabricated, and the wheel core 102 is formed in the area surrounded by the prefabricated wheel rim 101 through a liquid-solid forming process. Specifically, the prefabricated wheel rim 101 is placed in a mold, and then liquid first-type metal is injected into the mold. The first-type metal solidifies to form the wheel core 102, and the wheel core 102 is firmly assembled with the wheel rim 101. For example, the liquid-solid forming process can be implemented by liquid die forging technology.

[0027] When the wheel reaches the design life or is actually scrapped, the wheel can be sent to a recycling station to recover the aluminum alloy material of the wheel core 102 and reuse it to improve utilization and reduce resource waste.

[0028] The technical solution provided in the embodiment of the present application is that the wheel core is made of a first type of metal alloy; the outer peripheral surface of the wheel core is provided with an annular mounting groove or an annular convex portion; the wheel hoop is made of a 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 wheel hoop is provided with an annular mounting groove or an annular convex portion; the annular mounting groove and the annular convex portion on the outer peripheral surface of the wheel core and the inner peripheral surface of the wheel hoop are arranged correspondingly, and the annular convex portion is embedded in the annular mounting groove for axially limiting the wheel core and the wheel hoop. This process can solve the problem of difficulty in hot-fitting or pressing of traditional split wheels. In addition, the density of the first type of metal alloy is less than the density of the second type of metal, so that the strength of the wheel hoop can meet the requirements of contacting with the rail to transfer load, and the weight of the wheel core is relatively small, which is conducive to realizing the lightweight design of the bogie, and can reduce wheel-rail wear and wheel-rail noise.

[0029] When the outer peripheral surface of the wheel core 102 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 core 102. Based on the above technical solution, in the axial direction of the wheel core 102, along the direction from the outside to the inside of the wheel core 102, 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 rim 101, along the direction from the outside to the inside of the wheel rim 101, the height of the annular protrusion 105 gradually increases.

[0030] On the basis of meeting the strength requirement of the wheel core 102 , the deeper the depth of the annular mounting groove 106 is, the better the axial limiting effect between the wheel core 102 and the wheel hoop 101 is, and the stronger the connection between the two is.

[0031] 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 wheel core 102, along the direction from the outside to the inside of the wheel core 102, the height of the annular protrusion 105 gradually increases.

[0032] Furthermore, a second circumferential limiting structure is provided on the inner circumferential surface of the wheel rim 101, and a first circumferential limiting structure is provided on the outer circumferential surface of the wheel core 102 correspondingly. The first circumferential limiting structure and the second circumferential limiting structure cooperate to circumferentially limit the wheel core and the wheel rim to avoid relative rotation between the two along the circumferential direction.

[0033] One implementation method is: the second circumferential limiting structure is a plurality of smooth grooves 107 arranged on the inner circumferential surface of the wheel rim 101, and the first circumferential limiting structure is a smooth boss 108 arranged on the outer circumferential surface of the wheel core 102, the smooth boss 108 cooperates with the smooth grooves 107, and the smooth boss 108 is embedded in the smooth grooves 107 to achieve circumferential limiting between the wheel rim 101 and the wheel core 102.

[0034] Another embodiment is: the second circumferential limiting structure is a plurality of smooth bosses 108 arranged on the inner circumferential surface of the wheel rim 101, and the first circumferential limiting structure is a smooth groove 107 arranged on the outer circumferential surface of the wheel core 102, 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 wheel core 102.

[0035] The surface of the smooth groove 107 is a curved surface, and smoothly transitions with the inner circumference of the wheel rim 101 or the outer circumference of the wheel core 102. The surface of the smooth boss 108 is a curved surface, and smoothly transitions with the outer circumference of the wheel core 102 or the inner circumference of the wheel rim 101.

[0036] 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.

[0037] On the basis of the above technical solution, this embodiment provides an implementation of a wheel core 102: the wheel core 102 comprises: an integrally formed central portion 109, a spoke plate 110 and a connecting portion 111. The central portion 109 is provided with a central hole 113 for the axle to pass through, the spoke plate 110 is provided on the outer peripheral surface of the central portion 109, and the extending direction of the spoke plate 110 is perpendicular to the axial direction of the wheel core 102. The connecting portion 111 is provided at the end of the spoke plate 110 away from the central portion 109, and the outer peripheral surface of the connecting portion 111 is provided with an annular mounting groove 106.

[0038] The above-mentioned wheel core and wheel rim are made using a new liquid die forging forming technology to achieve integrated forming and preparation, simplify the process flow, improve production efficiency, reduce manufacturing costs, promote the economy of wheelset manufacturing, as well as driving safety and comfort.

[0039] This embodiment shows a scheme in which an annular mounting groove 106 is provided on the outer circumference of the wheel core 102 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 wheel core 102 is a "Y"-shaped design structure (such as Figure 1 The annular protrusion 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 wheel rim 101 and the wheel core 102 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.

[0040] The outer circumference of the wheel core 102 is evenly arranged with smooth bosses 108. In this embodiment, 9 smooth bosses 108 are evenly arranged along the circumference. 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.

[0041] Alternatively, the inner circumference of the wheel rim 101 and the outer circumference of the wheel core 102 are matched with each other through structures such as interference fit and key grooves.

[0042] On the basis of the above technical solution, this embodiment also provides a bogie, comprising wheels provided by any of the above contents.

[0043] This embodiment also provides a rail vehicle, comprising the above-mentioned bogie.

[0044] The bogie and rail vehicle provided in this embodiment have the same technical effects as the above-mentioned wheels.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 wheel core is made of the first type of metal alloy; the outer peripheral surface of the wheel core 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 wheel core and the inner circumference of the wheel hoop are correspondingly arranged, and the annular convex portion is embedded in the annular mounting groove for axially limiting the wheel core and the wheel hoop.

2. The wheel according to claim 1, characterized in that The wheel core is formed by a liquid-solid forming process in the area surrounded by the pre-manufactured wheel hoop.

3. The wheel according to claim 1, characterized in that When the outer peripheral surface of the wheel core 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 core in the axial direction of the wheel core; 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 core comprises: an integrally formed central portion, a spoke plate and a connecting portion; the central portion is provided with a central hole for the axle to pass through; the spoke plate is arranged on the outer peripheral surface of the central portion, and the extending direction of the spoke plate is perpendicular to the axial direction of the wheel core; the connecting portion is arranged at the end of the spoke plate away from the central portion; the outer peripheral surface of the connecting portion is provided with an annular mounting groove or an annular protrusion.

5. The wheel according to claim 1, 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 core is provided with a plurality of smooth grooves or smooth bosses; the inner circumference of the wheel rim is provided with corresponding smooth bosses and smooth grooves on the outer circumference of the wheel core, and the smooth bosses can be embedded in the smooth grooves for circumferentially limiting the wheel core and the wheel rim.

6. The wheel according to claim 5, characterized in that The surface of the smooth groove is a curved surface, and smoothly transitions with the surface of the wheel rim or the wheel core; the surface of the smooth boss is a curved surface, and smoothly transitions with the surface of the wheel rim or the wheel core.

7. The wheel according to claim 6, characterized in that The smooth grooves are arranged at equal intervals along the circumferential direction; the smooth grooves correspond to the smooth bosses one by one.

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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