Bogie and vehicle

Abstract

Provided are a bogie and a vehicle, relating to the field of bogie structures. The bogie comprises: a framework; a suspension apparatus connected to the framework, wherein the suspension apparatus comprises primary suspension members (31) and secondary suspension members (32), and the secondary suspension members (32) are formed as air springs; and an anti-rolling device, comprising a bolster anchor (51) and a torsion bar (52), wherein the bolster anchor (51) is arranged above the secondary suspension members (32); and end portions of the torsion rod (52) are rotatably connected to the framework by means of links, and a side portion of the torsion rod (52) is rotatably connected to the bolster anchor (51). The air springs can provide the most suitable stiffness characteristics for a vehicle, so as to ensure that the vehicle has high comfort in the operation process; in addition, the air springs can also automatically inflate or deflate on the basis of changes in passenger load, so as to ensure that the floor surface of the vehicle is kept unchanged within a fixed height range, thereby facilitating passengers' boarding and alighting at the platform, and improving the passenger experience during travel.

Description

A bogie and vehicle

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410503072.1, filed on April 25, 2024, entitled "A Bogie and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of vehicle powertrain systems, and in particular to a bogie and a vehicle. Background Technology

[0004] With urban and economic development, the demand for commuting between the main urban area and surrounding satellite cities or suburban areas is constantly increasing. To ensure rapid commuting, trams or high-speed trains need to increase their operating speeds. However, based on the bogie structure of existing vehicles, the stability and comfort of the vehicles at high speeds are poor, reducing the passenger's riding and travel experience.

[0005] Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a bogie and vehicle to solve the problem that the structure of the bogie in existing vehicles such as trams leads to poor stability and comfort when the vehicle is running at high speed.

[0007] In accordance with the above objectives, a first aspect of the present invention provides a bogie, wherein the bogie comprises:

[0008] Framework;

[0009] A suspension device connected to the frame; the suspension device includes a primary suspension member and a secondary suspension member, the secondary suspension member being formed as an air spring; and

[0010] The anti-roll device includes a bolster and a torsion bar. The bolster is disposed above the secondary suspension component. The end of the torsion bar is rotatably connected to the frame via a connecting rod, and the side of the torsion bar is rotatably connected to the bolster.

[0011] Preferably, the bogie further includes an axle assembly comprising two axles spaced apart along a first direction; each axle extends along a second direction perpendicular to the first direction; the axle assembly further includes a wheel and an axle box; and each axle has a wheel and an axle box at both ends of its extension direction.

[0012] Preferably, the frame includes side beams and cross beams. There are two side beams distributed along the second direction, and along the second direction, the side beams are located on opposite sides of two wheels connected to the same axle. There is one cross beam located between the two axles along the first direction. The two ends of the cross beam along the second direction are respectively connected to the two side beams.

[0013] Preferably, each side beam has two first recesses at its bottom that open toward the axle, the two first recesses being distributed along the first direction such that the axle box is located in the first recesses; a second recess is formed at the center of the top of the side beam, the second recess penetrating the opposite side of the side beam along the second direction; and a third recess is formed at the top of the crossbeam corresponding to the second recess.

[0014] Preferably, the primary suspension member is located in the first recess and connected between the frame and the axle box, and the primary suspension member is formed as a rubber spring; the secondary suspension member is disposed in the second recess.

[0015] Preferably, the bolster extends along the second direction, and the bottoms of both ends of the bolster's extension direction are respectively connected to the tops of the two secondary suspension components.

[0016] Preferably, along the first direction, the torsion bar is located at the first end of the rocker; the torsion bar is formed as a U-shaped structure with an opening in a direction away from the rocker.

[0017] Preferably, the bogie further includes two traction devices; along the first direction, both traction devices are located at the second end of the bolster; along the second direction, the traction devices are located on the opposite side of the two side beams; the two ends of the traction devices are respectively connected to the frame and the bolster.

[0018] Preferably, the bogie further includes a drive unit and a braking device connected to the drive unit.

[0019] According to a second aspect of the invention, a vehicle is provided, wherein the vehicle includes a bogie as described above.

[0020] According to the bogie and vehicle of the present invention, the secondary suspension component in the suspension device is set as an air spring, which can provide the vehicle with the most suitable stiffness characteristics to ensure high comfort during vehicle operation; in addition, the air spring can automatically inflate or deflate according to the change of passenger load to ensure that the vehicle floor surface remains within a fixed height range, thereby facilitating passengers to get on and off the vehicle at the platform, thus improving the passenger travel experience.

[0021] Furthermore, the present invention assembles the torsion bar and the bolster in a corresponding manner, thereby making full use of the upper space of the bogie and releasing the lower space of the bogie to meet the requirements of the vehicle's lower clearance. At the same time, it can also effectively improve the anti-roll performance of the bogie and the vehicle, that is, it can prevent the vehicle body from tilting excessively when driving at high speed, thereby effectively improving the stability of the vehicle when running at high speed.

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 is a top view of a bogie according to an embodiment of the present invention;

[0025] Figure 2 is a front view of a bogie according to an embodiment of the present invention.

[0026] Icons: 11-Axle; 12-Wheel; 13-Axle box; 2-Side beam; 21-First recess; 22-Second recess; 31-Primary suspension; 32-Secondary suspension; 4-Traction device; 51-Ballast; 52-Torsion bar; 53-Connecting rod; 61-Gearbox; 62-Traction motor; 71-Hydraulic braking unit; 72-Magnetic track braking unit. Detailed Implementation

[0027] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0028] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0029] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0030] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0031] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0032] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0033] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0034] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0035] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0036] According to a first aspect of the present invention, a bogie is provided, as shown in Figures 1 and 2. The bogie in this embodiment includes a frame, a suspension device, an anti-roll device, a wheel axle assembly, a traction device 4, a drive device, and a braking device. The cooperation of these components enables the bogie to possess high stability and ride comfort. The specific connection and positional relationships of the aforementioned components of the bogie according to the present invention will be described in detail below.

[0037] In this embodiment, as shown in FIG1, the wheel axle assembly includes two axles 11 spaced apart along a first direction. Each axle 11 extends along a second direction, which is perpendicular to the first direction. When the bogie is assembled with the vehicle, the first direction becomes the vehicle's direction of travel, and the second direction becomes the width direction of the vehicle body. Furthermore, the wheel axle assembly also includes wheels 12 and axle boxes 13. Each axle 11 has a wheel 12 and an axle box 13 at both ends of its extension direction. The axle box 13 transmits the vehicle's weight and load to the wheels 12.

[0038] Preferably, in this embodiment, the wheel 12 is an elastic wheel 12 with a diameter of 700-800mm. The large diameter wheel 12 is more conducive to the high-speed operation of the vehicle. At the same time, the elastic wheel 12 can absorb the high-frequency vibration between the wheel and the rail to reduce the wheel-rail impact, thereby further improving the stability of the bogie and the vehicle during operation.

[0039] As shown in Figures 1 and 2, the bogie in this embodiment is provided with a frame. This frame facilitates the connection and coordination of the various components within the bogie, ensuring the consistency and rationality of the overall bogie structure. Specifically, the frame in this embodiment includes two side beams 2 and a crossbeam. The two side beams 2 are distributed along a second direction, and along this second direction (as shown in Figure 1), the side beams 2 are located on the opposite side of the two wheels 12 connected to the same axle 11, i.e., the wheels 12 are located between the two side beams 2 (the wheels 12 are located inside the side beams 2). Furthermore, along a first direction, the crossbeam is located between the two axles, and both ends of the crossbeam along the second direction are connected to the two side beams 2 respectively.

[0040] More specifically, each side beam 2 has two first recesses 21 at its bottom that open toward the axle 11. These two first recesses 21 are distributed along a first direction at both ends of the side beam 2, so that each axle box 13 is located in its corresponding first recess 21. Furthermore, a second recess 22 is formed at the center of the top of each side beam 2. This second recess 22 extends along a second direction through the opposite side of the frame. The secondary suspension components 32 are correspondingly disposed in the second recess 22. This effectively reduces the overall height of the bogie, thereby reducing the height difference between the vehicle floor and the platform, facilitating passenger boarding and alighting. To avoid interference between the secondary suspension components 32 and the crossbeam, although not shown in the figures, a third recess corresponding to the second recess 22 is formed on the top of the crossbeam in this embodiment.

[0041] In this embodiment, the suspension system includes a primary suspension component 31 and a secondary suspension component 32. As shown in Figures 1 and 2, the primary suspension component 31 uses a herringbone rubber spring, which has certain nonlinear stiffness characteristics, thus facilitating the provision of appropriate stiffness for the vehicle under different load conditions. Furthermore, the primary suspension component 31 is located in the first recess 21 and connected between the side beam 2 and the axle box 13 (specifically, a mounting bracket for the primary suspension component 31 is provided below the axle box 13, and the side beam 2 is also provided with a mounting bracket for the primary suspension component 31. Under the weight of the vehicle body, the primary suspension component 31 is fixedly clamped between the axle box 13 and the side beam 2 through the mounting brackets on the axle box 13 and the side beam 2). The rubber spring has a small volume, which is beneficial for lowering the tram floor. In addition, rubber also has certain vibration reduction and noise reduction functions as well as the ability to absorb vibration energy, thereby improving the stability and comfort of the vehicle when running at high speeds.

[0042] As shown in Figure 1, the bogie in this embodiment includes two secondary suspension components 32, which are respectively disposed in the second recesses 22 of the two side beams 2. Specifically, the secondary suspension component 32 is disposed in the second recess 22 via positioning guide posts, and is connected to the bolster 51 via intake and exhaust guide posts. Furthermore, the secondary suspension component 32 is formed as an air spring, which can provide the vehicle with the most suitable stiffness characteristics to ensure high comfort during vehicle operation; in addition, the air spring can automatically inflate or deflate according to changes in passenger load to ensure that the vehicle floor surface can be maintained within a fixed height range, thereby facilitating passenger boarding and alighting at the platform.

[0043] In this embodiment, the bogie utilizes an anti-roll device to improve vehicle stability during high-speed operation and cornering. Specifically, as shown in Figures 1 and 2, the anti-roll device includes a bolster 51 and a torsion bar 52. The bolster 51 extends along a second direction and is positioned above the secondary suspension members 32, with the bottom ends of both ends of the bolster 51 connected to the tops of the two secondary suspension members 32. Furthermore, when the bogie is assembled with the vehicle, a side-bearing center pin rotation structure is used between the bolster 51 and the vehicle body to enable large-angle rotation between the bogie and the vehicle body, thereby improving the vehicle's passability on small-radius curves.

[0044] Furthermore, along the first direction (as shown in Figure 1), the torsion bar 52 is located at the first end of the bolster 51, and the torsion bar 52 is formed into a U-shaped structure with an opening in the direction away from the bolster 51. As shown in Figure 2, the end of the bolster 51 is rotatably connected to the component via a connecting rod 53 (the rotatable connection between the two can be achieved through a hinge), and the side of the torsion bar 52 is rotatably connected to the bolster 51 (the rotatable connection between the two can be achieved through components such as a connecting seat; the connection structure between the two is not shown in the figure). This arrangement allows for full utilization of the space in the bogie; in addition, the torsion bar 52 effectively improves the anti-roll performance of the bogie and the vehicle, that is, it prevents excessive body tilting when the vehicle is traveling at high speed, thereby effectively improving the high-speed running stability and comfort of the vehicle. The torsion bar 52 can also be designed to fit the specific structural form of the bolster 51 according to the requirements of the interior floor height, in order to maximize the achievement of low floor requirements.

[0045] In this embodiment, the bogie is equipped with two traction devices 4, as shown in Figure 1. Along the first direction, both traction devices 4 are located at the second end of the bolster 51; while along the second direction, the traction devices 4 are located on the side opposite to each other of the two side beams 2 (i.e., the traction devices 4 are located on the outer side of the side beams 2). Positioning the traction devices 4 on the outer side of the side beams 2 effectively utilizes the external space of the bogie, thereby effectively saving internal space and facilitating the arrangement of the drive unit inside the bogie; simultaneously, it also helps to lower the height of the vehicle floor. In this embodiment, the two ends of the traction devices 4 are connected to the side beams 2 and the bolster 51 respectively via rubber joints.

[0046] As shown in Figure 1, this bogie also includes a drive unit and a braking device connected to the drive unit. The drive unit consists of a two-stage reduction gearbox 61 and a high-power traction motor 62. In this embodiment, the gearbox 61 and the traction motor 62 are connected by a coupling. The gearbox 61 is connected to the crossbeam of the frame via a gearbox suspension rod or an elastic node, and the traction motor 62 is connected to the crossbeam of the frame via an elastic node. The two-stage reduction gearbox 61 reduces its height, thereby lowering the vehicle floor height for easier passenger boarding and alighting. The use of the high-power traction motor 62 ensures that the vehicle has high acceleration and high-speed operation capabilities; for example, the maximum speed of the vehicle can reach 120 km / h.

[0047] In addition, the braking device includes a hydraulic braking unit 71 and a magnetic rail braking unit 72. The hydraulic braking unit 71 is relatively small, and connecting it to the aforementioned gearbox 61 effectively saves internal space in the bogie, helps reduce the height of the vehicle floor, and simplifies the frame structure, facilitating weight reduction. The magnetic rail braking unit 72 employs an articulated magnetic rail brake, which increases the contact area between the magnetic rail and the rail surface, ensuring a large braking deceleration and thus guaranteeing vehicle braking safety.

[0048] According to the bogie of the present invention as described above, the secondary suspension component 32 in the suspension device is set as an air spring, which can provide the vehicle with the most suitable stiffness characteristics to ensure high comfort during vehicle operation. In addition, the air spring can automatically inflate or deflate according to changes in passenger load to ensure that the vehicle floor remains within a fixed height range, thereby facilitating passenger boarding and alighting at platforms and improving the passenger experience. Furthermore, the present invention assembles the torsion bar 52 and the bolster 51 in a corresponding manner, thereby making full use of the upper space of the bogie and freeing up the lower space of the bogie to meet the requirements of the vehicle's lower clearance. At the same time, it can also effectively improve the anti-roll performance of the bogie and the vehicle, that is, prevent the vehicle body from tilting excessively at high speeds, thereby effectively improving the stability of the vehicle at high speeds.

[0049] According to a second aspect of the present invention, a vehicle is provided, which is equipped with a bogie as described above, such that more than 70% of the vehicle's interior floor area is a low-floor area, thereby effectively reducing the height difference between the floor and the platform to facilitate passenger boarding and alighting; in addition, the vehicle's maximum speed can reach 120 km / h, the minimum passable curve radius can be reduced to 25 m, and the comfort level can reach 2.5.

[0050] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A bogie, characterized in that, The bogie includes: Framework; A suspension device connected to the frame; the suspension device includes a primary suspension member and a secondary suspension member, the secondary suspension member being formed as an air spring; and The anti-roll device includes a bolster and a torsion bar. The bolster is disposed above the secondary suspension component. The end of the torsion bar is rotatably connected to the frame via a connecting rod, and the side of the torsion bar is rotatably connected to the bolster.

2. The bogie according to claim 1, characterized in that, The bogie also includes an axle assembly comprising two axles spaced apart along a first direction; each axle extends along a second direction perpendicular to the first direction; the axle assembly also includes a wheel and an axle box; the wheel and the axle box are provided at both ends of the extension direction of each axle.

3. The bogie according to claim 2, characterized in that, The frame includes side beams and cross beams. There are two side beams distributed along the second direction, and along the second direction, the side beams are located on the opposite side of the two wheels connected to the same axle. There is one cross beam located between the two axles along the first direction. The two ends of the cross beam along the second direction are respectively connected to the two side beams.

4. The bogie according to claim 3, characterized in that, Each of the side beams has two first recesses at its bottom that open toward the axle, the two first recesses being distributed along the first direction such that the axle box is located in the first recesses; a second recess is formed at the center of the top of the side beam, the second recess penetrating the opposite side of the side beam along the second direction; and a third recess is formed at the top of the crossbeam corresponding to the second recess.

5. The bogie according to claim 4, characterized in that, The primary suspension element is located in the first recess and connected between the frame and the axle box, and the primary suspension element is formed as a rubber spring; the secondary suspension element is disposed in the second recess.

6. The bogie according to claim 5, characterized in that, The bolster extends along the second direction, and the bottoms of both ends of the bolster's extension direction are respectively connected to the tops of the two secondary suspension components.

7. The bogie according to claim 6, characterized in that, Along the first direction, the torsion bar is located at the first end of the rocker arm; the torsion bar is formed as a U-shaped structure with an opening in a direction away from the rocker arm.

8. The bogie according to claim 3, characterized in that, The bogie also includes two traction devices; along the first direction, both traction devices are located at the second end of the bolster; along the second direction, the traction devices are located on the side opposite to each other of the two side beams; the two ends of the traction devices are respectively connected to the frame and the bolster.

9. The bogie according to claim 1, characterized in that, The bogie also includes a drive unit and a braking device connected to the drive unit.

10. A vehicle, characterized in that, The vehicle includes a bogie as described in any one of claims 1 to 9.

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