Spoke wheel and rail vehicle

Abstract

This invention discloses a spoked wheel and a rail transit vehicle, relating to the field of vehicle engineering technology. The spoked wheel includes a rim, a hub, and multiple spokes; the hub is located at the center radially of the rim; all spokes constitute a spoke assembly, with the inner radial end of each spoke fixed to the outer circumferential surface of the hub and the outer radial end fixed to the inner circumferential surface of the rim; on the inner circumferential surface of the rim, the connection area of ​​the spoke assembly is located at the center axially, and annular mounting grooves are respectively provided on both sides of the connection area axially, in which noise-reducing damping rings are installed. Because the rim provides mounting space for noise-reducing damping rings axially on both sides of the connection area with the spoke assembly, noise-reducing damping rings can be installed to reduce noise, thereby improving the noise reduction capability of the spoked wheel.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and in particular to a spoked wheel and a rail transit vehicle. Background Technology

[0002] In the field of rail transit, the wheel is one of the core unsprung components of a rail vehicle. Reducing its noise can improve vehicle stability and ride comfort. However, in a certain type of spoked wheel, the two axial end faces of the wheel spokes are roughly on the same plane as the axial end face of the rim. This makes it difficult to install other noise reduction devices on the spoked wheel, thus giving it no significant advantage in noise reduction.

[0003] Therefore, how to improve the noise reduction capability of spoked wheels is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a spoked wheel and a rail transit vehicle, wherein the spoked wheel has better noise reduction capability.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A spoked wheel includes a rim, a hub, and a plurality of spokes; the hub is located at the center of the rim in the radial direction; all the spokes constitute a spoke assembly, the inner radial end of each spoke is fixed to the outer circumferential surface of the hub, and the outer radial end is fixed to the inner circumferential surface of the rim; on the inner circumferential surface of the rim, the connecting area of ​​the spoke assembly is located at the center in the axial direction, and the portions located on both sides of the connecting area in the axial direction are respectively provided with annular mounting grooves, in which noise-reducing damping rings are installed.

[0007] Preferably, the outer circumferential surface of the rim has a flange at one end in the axial direction; the spokes include flange-side spokes and non-flange-side spokes arranged sequentially in the axial direction away from the flange; a plurality of flange-side spokes are arranged sequentially around the hub in the circumferential direction, and a plurality of non-flange-side spokes are arranged sequentially around the hub in the circumferential direction.

[0008] Preferably, the number of spokes on the rim side and the number of spokes on the non-rim side are both in the range of 7-15.

[0009] Preferably, the non-rimmed spokes are perpendicular to the axial direction.

[0010] Preferably, the spokes on the rim side are inclined relative to the axial direction and move radially away from the direction where the spokes on the non-rim side are located, in a direction close to the hub.

[0011] Preferably, the angle formed between the rim spoke and the hub on the side axially away from the non-rim spoke is between 100 and 120°.

[0012] Preferably, in the axial direction, one axial end of the hub protrudes from the end of the rim where the rim is located, and the other axial end is recessed into the rim.

[0013] Preferably, elliptical rim-side spoke holes are formed between adjacent rim-side spokes; elliptical non-rim-side spoke holes are formed between adjacent non-rim-side spokes.

[0014] Preferably, the rim, hub, and spokes are an integrated structure.

[0015] A rail transit vehicle, including spoked wheels as described above.

[0016] The spoked wheel provided by the present invention includes a rim, a hub, and multiple spokes; the hub is located at the center of the rim in the radial direction; all spokes constitute a spoke assembly, with the inner radial end of each spoke fixed to the outer circumferential surface of the hub and the outer radial end fixed to the inner circumferential surface of the rim; on the inner circumferential surface of the rim, the connecting area of ​​the spoke assembly is located at the center in the axial direction, and the portions located on both sides of the connecting area in the axial direction are respectively provided with annular mounting grooves, in which noise reduction damping rings are installed.

[0017] In this spoked wheel, because there is space for the installation of noise-reducing damping rings on both sides of the rim, in the axial direction, where the spoke assembly is connected, noise-reducing damping rings can be installed to reduce noise, thus improving the noise reduction capability of the spoked wheel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a structural diagram of the spoked wheel on the rim side provided by the present invention;

[0020] Figure 2 This is a structural diagram of the spoked wheel on the non-rim side provided by the present invention;

[0021] Figure 3 This is an axial cross-sectional view of the spoked wheel on the rim side provided by the present invention.

[0022] Figure label:

[0023] 1. Rim; 11. Flange; 12. Mounting groove; 13. Connecting area;

[0024] Wheel hub 2;

[0025] Spoke 3, rim-side spoke 31, rim-side spoke hole 311, non-rim-side spoke 32, non-rim-side spoke hole 321;

[0026] Noise reduction damping ring 4;

[0027] Axial direction X. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The core of this invention is to provide a spoked wheel and a rail transit vehicle, wherein the spoked wheel has good noise reduction capability.

[0030] For a specific embodiment of the spoked wheel provided by this invention, please refer to [the specific embodiment]. Figures 1 to 3 It includes a rim 1, a hub 2, and multiple spokes 3 (i.e., spokes). Unless otherwise specified, the axial direction is the extension direction of the center line of the hub 2, and the circumferential and radial directions are based on this center line.

[0031] The hub 2 is located at the center of the radial direction of the rim 1. All spokes 3 constitute a spoke assembly, with the inner radial end of each spoke 3 fixed to the outer circumferential surface of the hub 2 and the outer radial end fixed to the inner circumferential surface of the rim 1. In the vehicle, the rim 1 mates with the rail, and the hub 2 mates with the axle. During the service of the wheel, the tread of the rim 1 contacts the rail, generating a large wheel-rail force, which is transmitted to the hub 2 through the spokes 3, balancing the vehicle's own weight transmitted from the axle.

[0032] Among them, such as Figure 3 As shown, on the inner circumferential surface of the rim 1: the connecting area 13 of the spoke assembly is located in the middle in the axial direction X, and the portions located on both sides of the connecting area 13 in the axial direction X are respectively provided with annular mounting grooves 12, which are fitted onto the outer side of the hub 2. Noise-reducing damping rings 4 are installed in the mounting grooves 12.

[0033] In this spoked wheel, because the rim 1 has space for the installation of noise-reducing damping rings 4 on both sides of the area 13 connecting with the spoke assembly in the axial direction X, the noise-reducing damping rings 4 can be installed to reduce noise, thereby improving the noise reduction capability of the spoked wheel.

[0034] Furthermore, such as Figure 1As shown, the outer circumferential surface of the rim 1 has a flange 11 at one end in the axial direction X, specifically a protruding arc portion on the rim 1. The spokes 3 include flange-side spokes 31 and non-flange-side spokes 32 arranged sequentially along the axial direction X away from the flange 11. (As shown...) Figure 1 As shown, multiple rim spokes 31 are arranged circumferentially around the hub 2, as follows: Figure 2 As shown, multiple non-rimmed spokes 32 are arranged circumferentially around the hub 2. By setting two rows of spokes 31 axially, the wheel's weight can be reduced while maintaining the spoke wheel's rigidity.

[0035] The number of spokes 31 on the rim side and spokes 32 on the non-rim side ranges from 7 to 15, preferably a prime number, such as 13, to ensure that the wheel obtains a better dynamic force effect on the wheel and rail.

[0036] Furthermore, such as Figure 2 and Figure 3 As shown, the non-rimmed spokes 32 are perpendicular to the axial direction X. The design of the non-rimmed spokes 32 being perpendicular to the rim 1 and hub 2 allows the non-rimmed spokes 32 on the axle box side to retract inwards, leaving sufficient space on the axle box side and avoiding spatial conflicts with the axle box. This design takes into account the spatial conflict with the bogie, especially the impact of the axle box on the wheel. Compared to traditional spoked wheels optimized from straight-spoke wheels, which cannot be directly applied to bogies with S-shaped spoked wheels due to spatial conflicts, the spoked wheel in this embodiment can be adapted to vehicles equipped with S-shaped spoked wheel structures. Of course, in other embodiments, the non-rimmed spokes 32 can also be inclined relative to the axial direction X.

[0037] Furthermore, such as Figure 1 and Figure 3 As shown, the rim-side spokes 31 are inclined relative to the axial direction X, and continuously move away from the direction where the non-rim-side spokes 32 are located in the radial direction and closer to the hub 2, which can improve the stability of the wheel. Of course, in other embodiments, the rim-side spokes 31 can also be perpendicular to the axial direction.

[0038] The included angle between the spokes 31 on the rim side and the hub 2 on the side away from the non-rim side spokes 32 in the axial direction X is between 100-120°, preferably between 105-110°; correspondingly, the included angle between the spokes 31 on the rim side and the rim 1 on the side away from the non-rim side spokes 32 in the axial direction X is between 60-80°, preferably between 70-75°.

[0039] Furthermore, such as Figure 3As shown, in the axial direction X, one axial end of the hub 2 protrudes from the end of the rim 1 where the rim 11 is located, while the other axial end is recessed into the rim 1. This allows the position of the hub 2 to match the positions of the rim-side spokes 31 and the non-rim-side spokes 32. Specifically, the rim-side spokes 31 are connected to the protruding end of the hub 2, while the non-rim-side spokes 32 are connected to the recessed end of the hub 2. Of course, in other embodiments, both axial ends of the hub 2 may extend axially out of the rim 1.

[0040] Furthermore, such as Figure 1 As shown, elliptical rim side spoke holes 311 are formed between adjacent rim side spokes 31, as... Figure 2 As shown, elliptical non-rimmed spoke holes 321 are formed between adjacent non-rimmed spokes 32, which can reduce stress concentration in the vicinity of the spoke holes. Of course, in other embodiments, the spoke holes can also be other shapes.

[0041] Furthermore, the rim 1, hub 2, and spokes 3 are an integrated structure, specifically forged as a single piece, thus making the spoked wheel a one-piece molded structure. This integrated, double-spoke structure better suits the load transmission path and stress distribution under wheel service conditions, effectively increasing the wheel's axial stiffness and reducing wheel-rail contact stiffness. It eliminates the need for separate production and assembly of the rim 1, spokes, and wheel-rail, avoiding potential failure hazards caused by assembly. Compared to traditional rolled steel wheels, it eliminates many processes such as ingot casting, forming, punching, and rolling, effectively reducing production costs. Of course, in other embodiments, the rim 1, hub 2, and spokes 3 can also be assembled from separate components to form the wheel.

[0042] The spoked wheel in this embodiment has the following advantages:

[0043] (1) Structural Applicability: Abandoning the traditional concept of wheel spokes, an integrated double-sided spoke structure is adopted, which is more in line with the load transmission path and stress distribution under the service conditions of the wheel, and can effectively increase the axial stiffness of the wheel and reduce the wheel-rail contact stiffness. When optimizing the structure of the wheel, the spatial conflict with the bogie is considered, especially the influence of the axle box on the wheel. The spokes 3 on one side of the axle box are contracted inward, and the angles of the spokes 3 with the rim 1 and hub 2 are designed to leave sufficient space on the axle box side to avoid spatial conflict with the axle box.

[0044] (2) Reliability assurance: The new structure is an integrated structure, which does not require separate production and assembly of the rim 1, spokes and rails, thus avoiding potential failure risks caused by assembly.

[0045] (3) Production cost: The new wheels can be integrally formed through casting process. Compared with traditional rolled steel wheels, it saves many processes such as casting, pressing, punching and rolling, so the production cost can be effectively reduced.

[0046] (4) Significant weight reduction effect: It can effectively achieve lightweight design of wheels (approximately 290kg, weight reduction ≥10%);

[0047] (5) The structural design leaves room for the installation of the noise reduction damping ring 4, and the vibration reduction and noise reduction effect can be guaranteed by the dual means of structure + noise reduction damping ring 4.

[0048] It is evident that this spoked wheel, based on the existing bogie structure and considering the installation method and space of the inner and outer noise-reducing damping rings 4, can effectively reduce wheel weight and improve the problem of wheel-rail vibration and noise radiation; it facilitates the installation of the noise-reducing damping rings 4; adopting an integrated double-spoke structure, based on the principle of structural optimization (topology optimization, shape optimization, size optimization), and based on actual service conditions (straight lines, curves, turnouts), the stress distribution and transmission direction of the wheel structure are analyzed, and the material distribution in the spoke area is optimized to make the stress distribution in the wheel service state more uniform, more in line with the load transmission path under the wheel service conditions, avoid stress concentration, effectively increase the axial stiffness of the wheel, reduce the wheel-rail contact stiffness, and effectively achieve the lightweight design of the wheel; it retains the spoke structure, and at the same time, the noise-reducing damping rings 4 can be installed like traditional rolled steel wheels, fully ensuring its vibration reduction and noise reduction advantages. After verification, one spoked wheel structure meets the strength requirements, while the weight is reduced to about 290kg, compared with the 339kg of traditional rolled steel wheels, the weight reduction can reach more than 14%.

[0049] In addition to the spoked wheel described above, the present invention also provides a rail transit vehicle that includes a spoked wheel. Specifically, the spoked wheel can be any of the spoked wheels provided in the above embodiments, and the beneficial effects can be referred to the respective embodiments above. The structure of other parts of this rail transit vehicle is described in the prior art and will not be repeated here.

[0050] It should be noted that when an element is referred to as "fixing" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as "connecting" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, in the description of this invention, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0051] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0054] The foregoing has provided a detailed description of the spoked wheel and rail transit vehicle provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A spoked wheel, characterized in that, The wheel assembly includes a rim (1), a hub (2), and multiple spokes (3); the hub (2) is located at the center of the rim (1) in the radial direction; all the spokes (3) constitute a spoke assembly, with the inner radial end of each spoke (3) fixed to the outer circumferential surface of the hub (2) and the outer radial end fixed to the inner circumferential surface of the rim (1); on the inner circumferential surface of the rim (1), the connecting area (13) of the spoke assembly is located at the center in the axial direction (X), and the portions located on both sides of the connecting area (13) in the axial direction (X) are respectively provided with annular mounting grooves (12), and noise reduction damping rings (4) are installed in the mounting grooves (12); The outer circumferential surface of the rim (1) has a flange (11) at one end in the axial direction (X); the spokes (3) include flange-side spokes (31) and non-flange-side spokes (32) arranged sequentially along the axial direction (X) away from the flange (11); a plurality of flange-side spokes (31) are arranged sequentially around the hub (2) in the circumferential direction, and a plurality of non-flange-side spokes (32) are arranged sequentially around the hub (2) in the circumferential direction; the non-flange-side spokes (32) are perpendicular to the axial direction (X), and the flange-side spokes (31) are inclined relative to the axial direction (X) and are radially close to the hub (11). 2) The direction is constantly away from the direction where the non-rim side spoke (32) is located. The angle formed between the rim side spoke (31) and the hub (2) on the side away from the non-rim side spoke (32) in the axial direction (X) is between 100-120°. In the axial direction (X), one axial end of the hub (2) protrudes from the end of the rim (11) where the rim (1) is located, and the other axial end is recessed in the rim (1). The rim side spoke (31) is connected to the protruding end of the hub (2), and the non-rim side spoke (32) is connected to the recessed end of the hub (2).

2. The spoked wheel according to claim 1, characterized in that, The number of spokes on the rim side (31) and spokes on the non-rim side (32) are both between 7 and 15.

3. The spoked wheel according to claim 1 or 2, characterized in that, Elliptical rim-side spoke holes (311) are formed between adjacent rim-side spokes (31); elliptical non-rim-side spoke holes (321) are formed between adjacent non-rim-side spokes (32).

4. The spoked wheel according to claim 1 or 2, characterized in that, The rim (1), hub (2) and spokes (3) are an integrated structure.

5. A rail transit vehicle, characterized in that, Includes the spoked wheel as described in any one of claims 1 to 4.

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