Bogie, rail vehicle and rail transit system

Abstract

The utility model relates to a bogie, a rail vehicle and a rail transit system, and the bogie comprises a mounting frame which is used for being connected with a vehicle body; the suspension assembly is used for being connected with the walking wheel, the suspension assembly is connected with the mounting frame, and the suspension assembly comprises a steering yoke used for being hinged to the walking wheel; the first suspension is connected between the steering yoke and the mounting frame; and the mounting frame is connected with the vehicle body through the second suspension. And a multi-stage vibration reduction structure is arranged, so that better vibration reduction performance can be realized, and the running comfort of the vehicle is higher.

Description

Technical Field

[0001] The present disclosure relates to the technical field of bogies, and in particular, to a bogie, a rail vehicle and a rail transit system. Background Art

[0002] In rail transit systems, rail vehicles use bogies to turn on the track. However, when current rail vehicles encounter curves or bumpy sections during driving, they often experience bumps and poor ride smoothness, which causes passengers to feel shaky, reduces ride comfort, and has a poor experience. Utility Model Content

[0003] An object of the present disclosure is to provide a bogie, a rail vehicle and a rail transit system to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a bogie, comprising: a mounting frame for connecting to a vehicle body; and a suspension assembly for connecting to a running wheel, and the suspension assembly is connected to the mounting frame, wherein the suspension assembly comprises: a steering yoke for articulating to the running wheel; a first suspension connected between the steering yoke and the mounting frame; and a second suspension, and the mounting frame is connected to the vehicle body through the second suspension.

[0005] Optionally, the first suspension includes a first spring and a first shock absorber, and the first spring is sleeved on the outer periphery of the first shock absorber.

[0006] Optionally, the first suspension includes a first spring and a first shock absorber, wherein the first spring is connected to the top of the steering yoke, and the first shock absorber is connected to the bottom of the steering yoke.

[0007] Optionally, the second suspension includes a second spring, which is used to be connected between the mounting frame and the vehicle body, and / or the second suspension includes a second shock absorber, which is used to be connected between the mounting frame and the vehicle body.

[0008] Optionally, the mounting frame is configured as a truss.

[0009] Optionally, the truss is constructed as a bilaterally symmetrical structure, and a group of the suspension components is installed on each of the left and right sides of the truss.

[0010] Optionally, the suspension assembly includes: a first swing arm, one end of which is hinged to the upper part of the steering yoke and the other end is hinged to the mounting frame; and a second swing arm, one end of which is hinged to the lower part of the steering yoke and the other end is hinged to the mounting frame.

[0011] Optionally, the bogie includes: a first steering arm, used to connect between the running wheel on the left and the guide wheel on the left; a second steering arm, used to connect between the running wheel on the right and the guide wheel on the right; and a first steering rod, connected left and right between the first steering arm and the second steering arm.

[0012] Optionally, a swivel member is rotatably connected below the mounting frame, and four guide cantilevers are connected to the swivel member, two of which are respectively used to connect the two guide wheels on the left, and the other two guide cantilevers are respectively used to connect the guide wheels on the right, and the first steering arm or the second steering arm is connected to the swivel member via a second steering tie rod.

[0013] Optionally, the two guide cantilevers on the left are configured to extend toward the left side of the vehicle body, and the two guide cantilevers on the right are configured to extend toward the right side of the vehicle body, and the guide cantilevers on the left and right sides are configured so that the opposite sides of the guide wheel on the left and the guide wheel on the right are used to abut the guide beam.

[0014] Optionally, the number of the first steering arms is two, which are used to connect the two guide wheels on the left side; the number of the second steering arms is two, which are used to connect the two guide wheels on the right side; the bogie also includes a third steering rod connected between the first steering arm and the second steering arm on the left and right sides; the third steering rod is spaced apart from the first steering rod in front and behind, and the third steering rod is configured to be retractable left and right.

[0015] Optionally, the first steering arm and the second steering arm are configured so that the interval between the left guide wheel and the right guide wheel is used to set the guide beam.

[0016] Optionally, the bogie includes: a first steering arm, used to connect between the running wheel on the left and the guide wheel on the left; and a second steering arm, used to connect between the running wheel on the right and the guide wheel on the right; the first steering arm and the second steering arm are configured so that the lowest sides of the guide wheel on the left and the guide wheel on the right are higher than the lowest sides of the running wheel on the left and the running wheel on the right.

[0017] Optionally, there are two groups of suspension components, the two groups of suspension components are respectively used to connect to the running wheels on the left and the running wheels on the right, and the two groups of suspension components are independently connected to the mounting frame.

[0018] According to a second aspect of an embodiment of the present disclosure, there is provided a rail vehicle, comprising a vehicle body and a bogie provided by the present disclosure.

[0019] According to a third aspect of an embodiment of the present disclosure, there is provided a rail transit system, comprising a rail beam and a rail vehicle provided by the present disclosure.

[0020] Through the above technical solution, the first suspension and the second suspension are arranged on the connection between the vehicle body and the running wheels, thereby forming a multi-stage vibration reduction structure between the vehicle body and the running wheels, which can achieve better vibration reduction performance and make the vehicle operation more comfortable.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 The figure is a front side view of a rail vehicle provided by an exemplary embodiment of the present disclosure when in use.

[0024] Figure 2 It is a structural schematic diagram of a bogie provided in an exemplary embodiment of the present disclosure.

[0025] Figure 3 It is a partial structural diagram of a bogie provided in an exemplary embodiment of the present disclosure.

[0026] Figure 4 It is a partial structural diagram of a bogie provided in an exemplary embodiment of the present disclosure.

[0027] Figure 5 It is a partial structural top view of a bogie provided in an exemplary embodiment of the present disclosure.

[0028] Figure 6 It is a partial structural top view of a bogie provided in an exemplary embodiment of the present disclosure.

[0029] Figure 7 It is a coordination diagram of a rail vehicle and a rail beam provided in an exemplary embodiment of the present disclosure.

[0030] Figure 8 It is a diagram of the coordination between a rail vehicle and a rail beam provided in an exemplary embodiment of the present disclosure.

[0031] Fig. 9 is a schematic diagram of a mounting bracket provided by an exemplary embodiment of the present disclosure.

[0032] Description of Reference Numerals

[0033] 10-car body, 20-running wheel, 21-running wheel hub, 22-track beam, 30-guide wheel, 31-guide wheel hub, 32-guide beam, 100-mounting frame, 2321-second shock absorber mounting interface, 2311-second spring mounting interface, 241-first swing arm mounting interface, 251-second swing arm mounting interface, 200-suspension assembly, 210-steering yoke, 220-first suspension, 221-first spring, 222-first shock absorber, 230-second suspension, 231-second spring, 232-second shock absorber, 240-first swing arm, 250-second swing arm, 310-first steering arm, 320-second steering arm, 330-first steering rod, 340-slewing member, 341-slewing support, 350-guide cantilever, 360-second steering rod, 370-third steering rod, 371-elastic member, 380-stabilizer bar. DETAILED DESCRIPTION

[0034] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0035] In the present disclosure, unless otherwise stated, directional words such as "up, down, horizontal, vertical" are defined according to the direction of use of the vehicle, "lateral" refers to the left and right direction of the vehicle, "longitudinal" refers to the front and rear direction of the vehicle, "left, right" refers to the direction facing the front of the vehicle, and is defined according to the front view of the vehicle. The specific directions of "up, down, left, right" can be referred to in detail. Figure 1 The terms "inside" and "outside" are defined according to the outline of the corresponding parts. The terms "first" and "second" used in this disclosure are to distinguish one element from another and have no order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] The present disclosure provides a bogie, referring to Figure 1 As shown, the bogie includes a mounting frame 100 and a suspension assembly 200 . The mounting frame 100 is used to be connected to the vehicle body 10 , and the suspension assembly 200 is used to be connected to the running wheel 20 , and the suspension assembly 200 is connected to the mounting frame 100 .

[0037] The suspension assembly 200 includes a steering yoke 210, a first suspension 220, and a second suspension 230. The steering yoke 210 is used to be hinged to the running wheel 20, for example, hinged to the running wheel hub 21 through a kingpin. The first suspension 220 is connected between the steering yoke 210 and the mounting frame 100, and can play a first-level vibration reduction role. The mounting frame 100 is connected to the vehicle body 10 through the second suspension 230, and the second suspension 230 can play a second-level vibration reduction role.

[0038] Through the above technical solution, the first suspension 220 and the second suspension 230 are set on the connection between the vehicle body 10 and the running wheel 20, thereby forming a multi-stage vibration reduction structure between the vehicle body 10 and the running wheel 20, which can achieve better vibration reduction performance and make the vehicle operation more comfortable.

[0039] In the embodiment of the present disclosure, the number of suspension components 200 can be two groups, and the two groups of suspension components 200 are respectively used to connect to the running wheel 20 on the left and the running wheel 20 on the right, and the two groups of suspension components 200 are independently connected to the mounting frame 100, that is, the bogie is connected to the vehicle body 10 in a manner that the wheels on each side are independently suspended, so that the movement between the two can be independent and will not affect each other. The steering yoke 210 in each group of suspension components 200 can be connected to the running wheel 20 on the corresponding side. The corresponding side in the embodiment of the present disclosure refers to the same side. For example, the running wheel 20 on the corresponding side of the steering yoke 210 on the left is the running wheel on the left, and the running wheel 20 on the corresponding side of the steering yoke 210 on the right is the running wheel on the right. By adopting an independent suspension method, the running wheels 20 on the left and right sides can move independently without affecting each other. When the running heights on both sides are different, the displacement of the two running wheels 20 in the vertical direction will not affect each other, thereby reducing the impact of the uneven running surfaces on the vehicle movement, reducing bumps, and improving driving smoothness and driving comfort.

[0040] In the disclosed embodiment, the first suspension 220 may include at least one of a first spring 221 and a first shock absorber 222. In order to ensure that the vehicle can reduce vibration and quickly stabilize at the same time, the first suspension 220 may include both the first spring 221 and the first shock absorber 222.

[0041] According to an embodiment of the present disclosure, referring to Figure 2 and Figure 3 The first spring 221 may be a spiral spring, and the first spring 221 may be sleeved on the outer periphery of the first shock absorber 222. In this way, space can be saved and the support stiffness can be increased because the two have the same movement direction.

[0042] According to another embodiment of the present disclosure, referring to Figure 4The first spring 221 can be connected to the top of the steering yoke 210, and the first shock absorber 222 can be connected to the bottom of the steering yoke 210. In this embodiment, the first spring 221 can be as follows Figure 2 and Figure 3 The helical spring shown in FIG. 1 may also be Figure 4 The air spring shown in . Separately arranging the first spring 221 and the first shock absorber 222 allows the two to adjust the vehicle independently, and the vehicle body posture can be controlled more accurately.

[0043] In the embodiment of the present disclosure, the second suspension 230 may include at least one of a second spring 231 and a second shock absorber 232, for example, both of them. The second spring 231 and the second shock absorber 232 may be used to connect between the mounting frame 100 and the vehicle body 10. Figure 2 The second spring 231 and the second shock absorber 232 can be separately arranged to ensure a better stabilization effect. Of course, it is understandable that the second spring 231 and the second shock absorber 232 can also be installed in a set manner. The second spring 231 here can be a spiral spring or an air spring, which is not limited here.

[0044] exist Figure 2 In the illustrated embodiment, the second spring 231 installed more directly with the vehicle body 10 is set as an air spring, which can better ensure riding comfort, and the air spring is set separately from the second shock absorber 232 to make the vehicle control more precise. In addition, the first spring 221 which is farther from the vehicle body 10 can be set as a spiral spring to save costs, and is set with the first shock absorber 222 to save space between the two running wheels 20.

[0045] Reference Figure 1 and Figure 3The suspension assembly 200 may include a first swing arm 240 and a second swing arm 250. One end of the first swing arm 240 is hinged to the upper part of the steering yoke 210, and the other end is hinged to the mounting frame 100; one end of the second swing arm 250 is hinged to the lower part of the steering yoke 210, and the other end is hinged to the mounting frame 100. In this way, each running wheel 20 is connected to the vehicle body 10 through the swing arm. When the road surface on one side is uneven, the running wheel 20 on this side will rise or fall along the uneven movement there, and the first swing arm 240 and the second swing arm 250 on this side will rotate relative to each other. At this time, the suspension will be compressed or stretched, and the running wheel 20 on each side can move independently through the up and down movement of the first swing arm 240 and the second swing arm 250 on the corresponding side. The movements of the running wheels 20 on the left and right sides are not affected by each other, which can greatly improve the vehicle's ability to reduce vibration when dealing with uneven roads, avoid excessive side roll of the entire bogie, make the entire bogie more adaptable to the road surface, and be more stable when passing, thereby improving the smoothness of the vehicle when driving.

[0046] Among them, refer to Figure 3 There can be two first swing arms 240 and two second swing arms 250, and the two identical swing arms can be hinged at the same position. By setting two swing arms, the connection reliability between the bogie and the car body 10 can be guaranteed, the force transmission effect can be improved, and thus the bumps can be improved.

[0047] In the disclosed embodiment, in order to establish a steering force relationship between two independent suspension components, refer to Figures 3 to 6 The bogie may include a first steering arm 310, a second steering arm 320 and a first steering tie rod 330. The first steering arm 310 is used to connect between the running wheel 20 on the left and the guide wheel 30 on the left. As shown in the figure, it is connected between the running wheel hub 21 and the guide wheel hub 31 to establish force transmission between the running wheel 20 on the left and the guide wheel 30 on the left; the second steering arm 320 is used to connect between the running wheel 20 on the right and the guide wheel 30 on the right to establish force transmission between the running wheel 20 on the right and the guide wheel 30 on the right; the first steering tie rod 330 is connected between the first steering arm 310 and the second steering arm 320 on the left and right to connect the left and right sides, so as to achieve the same steering angle of the running wheels 20 on the left and right sides. When the guide wheel 30 receives the external force of the guide beam 32 and turns, the running wheel 20 can be driven to rotate through a series of rod systems, thereby realizing the steering of the vehicle.

[0048] In one embodiment, the first steering arm 310 and the second steering arm 320 may be indirectly connected to the guide wheel 30 through other structures. Figure 5, a swivel member 340 can be rotatably connected below the mounting frame 100, for example, it can be rotatably connected to a swivel support 341 below the mounting frame 100. Four guide cantilevers 350 are connected to the swivel member 340, and each guide cantilever 350 is used to connect a guide wheel 30. Two guide cantilevers 350 are respectively used to connect the two guide wheels 30 on the left side, and the other two guide cantilevers 350 are respectively used to connect the guide wheels 30 on the right side. The first steering arm 310 or the second steering arm 320 is connected to the swivel member 340 through the second steering tie rod 360, so as to establish a connection between the steering arm and the guide cantilever through the swivel member 340. Among them, the first steering tie rod 330 connected between the first steering arm 310 and the second steering arm 320 can be connected close to the front side of the running wheel 20, and the second steering tie rod 360 connected between the steering arm and the guide cantilever 350 can be connected close to the rear side of the running wheel 20, so as to guide the running wheel 20 in the front and rear directions.

[0049] Combination Figure 1 The two guide cantilevers 350 on the left side can be configured to extend toward the left side of the vehicle body, that is, the guide cantilevers 350 extend from the middle area of ​​the two running wheels 20 to the left, and the two guide cantilevers 350 on the right side can be configured to extend toward the right side of the vehicle body, that is, the guide cantilevers 350 extend from the middle area of ​​the two running wheels 20 to the right. Here, the guide cantilevers 350 on both sides can extend to the left and right sides respectively, so that the guide wheels 30 on the left and right sides can be far apart, so that the opposite sides of the guide wheels 30 on the left and right sides are used to abut against the guide beam 32, such as Figure 1 shown.

[0050] In one embodiment, each guide wheel 30 may be directly connected to the first steering arm 310 and the second steering arm 320. Figure 6 There are two first steering arms 310, and the two first steering arms 310 can be one in front of the other, and used to connect the two guide wheels 30 on the left. There are two second steering arms 320, and the two second steering arms 320 can be one in front of the other, and used to connect the two guide wheels 30 on the right. In this embodiment, the bogie can also include a third steering rod 370 connected between the first steering arm 310 and the second steering arm 320 on the left and right. The third steering rod 370 can be spaced apart from the first steering rod 330 in front and back, and the third steering rod 370 is configured to be retractable left and right, so as to attenuate vibration during steering. For example, in one embodiment, an elastic member 371 can be connected to the middle of the third steering rod 370, and the third steering rod 370 is divided into two by the elastic member 371, so as to attenuate vibration by the elastic member 371. It should be noted here that in the embodiments of the present disclosure, all the connections between the steering rods and other structures are hinged, refer to Figure 6 The central axis of the articulation is the vertical direction of the vehicle, that is, perpendicular to Figure 6 Direction of drawing.

[0051] Combination Figure 7 When each guide wheel 30 is directly connected to the steering arm, the first steering arm 310 and the second steering arm 320 can be configured so that the interval between the left guide wheel 30 and the right guide wheel 30 is used to set the guide beam 32. In this embodiment, the guide wheel 30 can be guided in the middle area, and the guide beam 32 can be set as follows: Figure 7 In the T-shape, in this case, there is no need to set a guide cantilever to arrange the guide wheel 30 to the left and right sides, which effectively saves excessive structures and simplifies the structure, thereby reducing the unsprung mass and improving vehicle performance.

[0052] According to an embodiment of the present disclosure, the bogie may include the first steering arm 310 for connecting between the left running wheel 20 and the left guide wheel 30 and the second steering arm 320 for connecting between the right running wheel 20 and the right guide wheel 30, but does not include a steering tie rod. Figure 8 As shown, the first steering arm 310 and the second steering arm 320 can be arranged so that the lowest sides of the left guide wheel 30 and the right guide wheel 30 are higher than the lowest sides of the left running wheel 20 and the right running wheel 20, that is, the guide wheel 30 can be arranged higher than 20 to adapt to the situation where the guide beam 32 is higher than the track beam 22. In this case, the running wheel 20 is located between the guide beams 32 on both sides, and the steering of the running wheels 20 on the left and right sides can be changed accordingly without the need to set a steering rod for further connection. This embodiment can expand the scope of use of the bogie and can be applicable to any track beam 22, because it only needs to add a suitable guide beam 32 upward on the track beam 22, without the need for a steering rod like Figure 1 The structure of the track beam 22 itself is destroyed as in the above method, and the guide beam 32 is dug out by digging a groove in the track beam 32.

[0053] In the present disclosure, refer to Figure 4 A stabilizer bar 380 may be connected between the steering yokes 210 on the left and right sides to prevent the vehicle from having an excessive roll angle.

[0054] In the embodiment of the present disclosure, the mounting frame 100 can be in various forms, as long as it can mount various components. Fig. 9 The mounting frame 100 can be constructed as a truss, that is, a plurality of rods connected together. The truss has high strength and light weight, and can reduce the unsprung mass compared to the axle method in the prior art.

[0055] The truss structure is a bilaterally symmetrical structure, and a set of suspension components 200 are installed on each of the left and right sides of the truss, so that the structures on the left and right sides are uniform, and the two suspension components 200 can be installed through one mounting frame 100, saving the number of parts and saving space. In other embodiments, the two suspension components 200 can be connected to the vehicle body through one mounting frame respectively, and the present disclosure does not limit this. The mounting frame 100 can be provided with a second shock absorber mounting interface 2321, a second spring mounting interface 2311, a first swing arm mounting interface 241, a second swing arm mounting interface 251, a mounting interface of the first suspension 220, and a mounting interface of the stabilizer bar.

[0056] According to a second aspect of the embodiment of the present disclosure, a rail vehicle is provided, comprising a vehicle body 10 and the above-mentioned bogie, and having all the beneficial effects of the above-mentioned bogie, which will not be repeated here. The rail vehicle may include multiple bogies, and one or more of the multiple bogies may be set as the bogie in the embodiment of this disclosure.

[0057] According to a third aspect of the embodiment of the present disclosure, a rail transit system is provided, referring to Figure 1 The rail transit system may include a rail beam 22 and the above-mentioned rail vehicle, and has all the beneficial effects of the above-mentioned rail vehicle, which will not be repeated here.

[0058] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0060] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A bogie, characterized in that: include: A mounting frame, used for connection with the vehicle body; as well as A suspension assembly is used to connect with the running wheel, and the suspension assembly is connected with the mounting frame, Wherein, the suspension assembly comprises: A steering yoke, used for being articulated with the running wheel; A first suspension connected between the steering yoke and the mounting frame; and A second suspension, wherein the mounting frame is connected to the vehicle body via the second suspension.

2. The bogie according to claim 1, characterized in that: The first suspension includes a first spring and a first shock absorber, and the first spring is sleeved on the outer periphery of the first shock absorber.

3. The bogie according to claim 1, characterized in that: The first suspension includes a first spring and a first shock absorber, wherein the first spring is connected to the top of the steering yoke, and the first shock absorber is connected to the bottom of the steering yoke.

4. The bogie according to claim 1, characterized in that: The second suspension includes a second spring, which is used to be connected between the mounting frame and the vehicle body, and / or the second suspension includes a second shock absorber, which is used to be connected between the mounting frame and the vehicle body.

5. The bogie according to claim 1, characterized in that: The mounting frame is configured as a truss.

6. The bogie according to claim 5, characterized in that: The truss structure is a bilaterally symmetrical structure, and a group of the suspension components is respectively installed on the left and right sides of the truss.

7. The bogie according to claim 1, characterized in that: The suspension assembly comprises: A first swing arm, one end of which is hinged to the upper part of the steering yoke, and the other end of which is hinged to the mounting frame; and The second swing arm has one end hinged to the lower part of the steering yoke and the other end hinged to the mounting frame.

8. The bogie according to claim 1, characterized in that: The bogie comprises: A first steering arm is used to connect between the left running wheel and the left guide wheel; a second steering arm, used to be connected between the right running wheel and the right guide wheel; and The first steering tie rod is connected between the first steering arm and the second steering arm on the left and right sides.

9. The bogie according to claim 8, characterized in that A swivel member is rotatably connected below the mounting frame, and four guide cantilevers are connected to the swivel member, two of which are respectively used to connect the two guide wheels on the left, and the other two guide cantilevers are respectively used to connect the guide wheels on the right, and the first steering arm or the second steering arm is connected to the swivel member via a second steering tie rod.

10. The bogie according to claim 9, characterized in that The two guide cantilevers on the left are configured to extend toward the left side of the vehicle body, and the two guide cantilevers on the right are configured to extend toward the right side of the vehicle body, and the guide cantilevers on the left and right sides are configured so that the opposite sides of the guide wheel on the left and the guide wheel on the right are used to abut the guide beam.

11. The bogie according to claim 8, characterized in that The number of the first steering arms is two, which are used to connect the two guide wheels on the left side. The number of the second steering arms is two, which are used to connect the two guide wheels on the right side. The bogie also includes a third steering rod connected between the first steering arm and the second steering arm on the left and right sides. The third steering rod is spaced apart from the first steering rod in front and behind, and the third steering rod is configured to be retractable left and right.

12. The bogie according to claim 11, characterized in that The first steering arm and the second steering arm are configured such that a space between the left guide wheel and the right guide wheel is used to set a guide beam.

13. The bogie according to claim 1, characterized in that The bogie comprises: A first steering arm, used for connecting between the left running wheel and the left guide wheel; and A second steering arm is used to connect between the right running wheel and the right guide wheel; The first steering arm and the second steering arm are arranged so that the lowest sides of the left guide wheel and the right guide wheel are both higher than the lowest sides of the left running wheel and the right running wheel.

14. The bogie according to claim 1, characterized in that There are two groups of suspension components, which are respectively used to connect to the running wheels on the left and the running wheels on the right, and the two groups of suspension components are independently connected to the mounting frame.

15. A rail vehicle, characterized in that: The vehicle comprises a vehicle body and a bogie according to any one of claims 1-14.

16. A rail transit system, characterized in that: The invention comprises a track beam and a rail vehicle according to claim 15 .

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