Urban rail vehicle bogie air spring and installation method thereof

Abstract

The invention discloses an urban rail vehicle bogie air spring and an installation method thereof.The urban rail vehicle bogie air spring comprises an upper cover plate (1), an air bag (2) and an auxiliary spring (3), the side edge of the upper cover plate is provided with a first air inlet channel (1.1) and a second air inlet channel (1.2), and the first air inlet channel and the second air inlet channel are communicated with the air bag; the first air inlet channel is used for being connected with an auxiliary air chamber on a vehicle, and the second air inlet channel is used for being connected with a height valve pipeline. The first air inlet channel and the second air inlet channel on the two sides of the upper cover plate are directly connected to the auxiliary air chamber and the altitude valve, the vehicle bottom chassis sleeper beam connected with the upper cover plate does not need to consider an installation connector and a sleeper beam insertion piece which are connected with an air spring air inlet in a matched mode, and therefore the universality problem of a vehicle body when the bogie air spring adopts different installation spans can be solved.

Description

Technical Field

[0001] The invention relates to a rail transit vehicle, in particular to an urban rail vehicle bogie air spring and an installation method thereof. Background Art

[0002] Air springs are the main load-bearing and shock-absorbing components of the secondary suspension of urban rail vehicles and EMU bogies. Figure 1 As shown, the conventional air spring is mainly composed of an upper cover plate 1, an air bag 2, an auxiliary spring 3 and other components, and an air inlet 11 is provided on the top of the upper cover plate 1. Figure 2 As shown, the air spring is installed between the car body chassis 4 and the bogie frame 5, wherein the upper cover plate 1 is connected to the bolster on the car body chassis 4, and the air inlet 11 is connected to the auxiliary air chamber through the bolster plug-in 41 and the air pipeline. For air springs with independent additional air chambers, the existing bogie air springs and auxiliary air chambers usually adopt the above-mentioned top vertical ventilation method. In order to ensure the versatility of the interface on the car body chassis, the lateral installation span of the air springs on both sides of the bogie frame 5 is basically consistent (usually about 1900mm).

[0003] The vertical ventilation method of air springs has been widely used in mature subway platforms, but for the newly designed axle box built-in bogie project with a smaller space, this connection scheme has the following problems: Due to the very compact spatial structure of the axle box built-in bogie, the lateral installation span of the left and right air springs of the bogie is greatly reduced compared with the lateral installation span of the air springs of the conventional bogie. Due to the reduction of the lateral installation span of the left and right air springs, the installation interface between the bogie and the car body frame also changes accordingly, which requires the bolster structure on the car body frame that is connected to the air spring air inlet to be redesigned. The existing mature platform car body is no longer suitable for the axle box built-in bogie, which greatly reduces the versatility of the car body. Summary of the invention

[0004] The technical problem to be solved by the present invention is that, in view of the deficiency that the existing air springs are not suitable for different lateral spans, the present invention provides an urban rail vehicle bogie air spring and an installation method thereof, and solves the versatility problem of the vehicle body when the bogie air spring adopts different lateral installation spans by optimizing the structure of the air spring itself and optimizing the ventilation method.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An air spring for a bogie of an urban rail vehicle comprises an upper cover plate, an air bag and an auxiliary spring, and its structural features are: a first air intake channel and a second air intake channel are arranged on the side of the upper cover plate, the first air intake channel and the second air intake channel are respectively connected to the air bag, the first air intake channel is used to connect to an auxiliary air chamber on the vehicle, and the second air intake channel is used to connect to a height valve pipeline.

[0007] The air spring of the present invention adopts a lateral ventilation method to replace the vertical ventilation structure of the traditional air spring. The air spring no longer needs to be connected to the auxiliary air chamber through a bolster plug-in installed inside the bolster, but is directly connected to the auxiliary air chamber through a lateral air pipeline connected to the first and second air intake channels. When the air spring adopts different lateral installation spans, it is no longer necessary to redesign the bolster structure of the vehicle body, thereby ensuring the versatility of the vehicle body.

[0008] Preferably, the top surface of the auxiliary spring is substantially flush with the bottom surface of the upper cover plate, and the upper cover plate as a whole is configured as a concave structure that is thick at the periphery and thin in the middle, and a deformation gap is formed between the concave structure and the auxiliary spring, so that the air spring of the present invention can be installed in an extremely narrow installation gap while ensuring that the air gap height of the air spring is not affected.

[0009] Preferably, the first air inlet channel and the second air inlet channel respectively include a front section as a connection interface and a rear section as a connection pipeline, the front section is set as a circular air channel, the rear section is set as an elliptical air channel, one end of the elliptical air channel is connected to the circular air channel, and the other end is connected to the airbag, and the cross-sectional area of ​​the elliptical air channel is equal to the cross-sectional area of ​​the circular air channel. In this way, the elliptical air channel used in the present invention is a flat structure and occupies a small vertical space, so it can be adapted to an extremely narrow installation gap. At the same time, the circular air channel can be used to connect with the straight-through joint at the end of the air pipeline.

[0010] Preferably, an air damping module is arranged inside the circular air duct so that the air spring can provide damping effect, which can replace the function of the secondary vertical shock absorber, and the bogie can cancel the secondary vertical shock absorber.

[0011] Preferably, a first positioning pin and a second positioning pin are provided on the top surface of the upper cover plate for positioning and connecting the air spring to the vehicle body.

[0012] Preferably, the upper cover plate is a left-right symmetrical structure, so that the left and right air springs installed on the bogie can be interchanged, and the height valve of the bogie can be arbitrarily arranged inside and outside the frame side beam.

[0013] Based on the same inventive concept, the present invention also provides a method for installing the air spring of the urban rail vehicle bogie, wherein the upper cover plate is installed in cooperation with the vehicle body frame, the auxiliary spring is installed in cooperation with the bogie frame, the first air intake channel is directly connected to the auxiliary air chamber on the vehicle through an air pipeline, and the second air intake channel is connected to the height valve pipeline through an end joint.

[0014] Preferably, a positioning hole is provided on the vehicle body underframe, a positioning pin is provided on the upper cover plate, and the positioning pin on the upper cover plate is inserted into the positioning hole on the vehicle body underframe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The air spring of the present invention adopts a lateral ventilation method instead of a vertical ventilation method. The air inlet of the air spring no longer needs to be connected to the bolster through a bolster plug-in, and there is no need to set an air spring air inlet installation interface on the bolster. In this way, on the one hand, the vehicle body can be adapted to different air spring installation spans by flexibly adjusting the arrangement of the air pipeline, thereby solving the versatility problem of the vehicle body at different installation spans. On the other hand, the bolster plug-in connecting the air spring to the vehicle body chassis can be eliminated, thereby reducing the production and manufacturing costs of the vehicle body.

[0017] 2) The first and second air inlet channels of the air spring of the present invention are composed of a flat elliptical air channel and a circular air channel. The cross-sectional area of ​​the front half of the elliptical air channel is equivalent to the cross-sectional area of ​​the rear half of the circular air channel. This can not only ensure the ventilation efficiency per unit time, but also save the vertical installation space of the air spring by using the elliptical air channel.

[0018] 3) The upper cover plate of the present invention is configured as a concave structure with a thick periphery and a thin middle, which ensures the air gap height of the air spring within a limited height space, saves the vertical installation space of the air spring, saves the thickness of the plate, and realizes a lightweight design.

[0019] 4) The air damping module is integrated and installed in the first and second air inlet passages of the present invention, so that the air spring can provide damping effect, which can replace the function of the secondary vertical shock absorber, and the bogie can cancel the secondary vertical shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the structure of a traditional air spring.

[0022] Figure 2 This is a schematic diagram of the installation and ventilation structure of a traditional air spring.

[0023] Figure 3 It is a schematic diagram of the structure of the air spring of the present invention.

[0024] Figure 4 It is a top view of the air spring of the present invention.

[0025] Figure 5 for Figure 4 A-A section view.

[0026] Figure 6 It is a schematic diagram of the bottom surface structure of the upper cover plate of the air spring of the present invention.

[0027] Legend:

[0028] 1 multifunctional cover, 2 airbag, 3 auxiliary spring, 4 car body frame, 5 bogie frame, 11 air intake, 41 bolster plug-in;

[0029] 1.1 first air inlet channel, 1.2 second air inlet channel, 1.3 first positioning pin, 1.4 second positioning pin, 1.5 concave structure;

[0030] 1.1.1 Circular air duct, 1.1.2 Oval air duct, 1.1.3 Air damping module, 1.2.1 Circular air duct, 1.2.2 Oval air duct, 1.2.3 Air damping module. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 3 As shown, an embodiment of the air spring of the present invention is mainly composed of an upper cover plate 1, an air bag 2, and an auxiliary spring 3. The upper cover plate 1 is installed in cooperation with the vehicle body underframe, and the auxiliary spring 3 is installed in cooperation with the bogie frame.

[0035] like Figure 4 , Figure 5As shown, a first air inlet channel 1.1 is arranged on the left side of the upper cover plate, and a second air inlet channel 1.2 is arranged on the right side. The first air inlet channel 1.1 is connected to the auxiliary air chamber on the vehicle through an air pipeline, and the second air inlet channel 1.2 is connected to the height valve pipeline through an end joint. In this way, the air spring of the present invention takes in and out air through the first air inlet channel 1.1 and the second air inlet channel 1.2 on the side, replacing the vertical air inlet in the middle of the upper cover plate of the traditional air spring.

[0036] The first air inlet channel 1.1 of the upper cover plate 1 is composed of a front section and a rear section, the front section is a circular air channel 1.1.1, and the rear section is an elliptical air channel 1.1.2. The circular air channel 1.1.1 and the elliptical air channel 1.1.2 are connected by welding, and the cross-sectional area of ​​the rear section of the circular air channel is designed to be equivalent to the cross-sectional area of ​​the front section of the elliptical air channel. The elliptical air channel 1.1.2 is a flat structure, which occupies a small vertical space, and the circular air channel 1.1.1 is connected to the straight-through joint at the end of the air pipeline.

[0037] The second air intake channel 1.2 of the upper cover plate 1 is symmetrically designed with the first air intake channel 1.1, wherein the front section is a circular air intake channel 1.2.1 and the rear section is an elliptical air intake channel 1.2.2. The circular air intake channel 1.2.1 and the elliptical air intake channel 1.2.2 are connected by welding, and the cross-sectional area of ​​the rear section of the circular air intake channel is designed to be equivalent to the cross-sectional area of ​​the front section of the elliptical air intake channel.

[0038] An air damping module 1.1.3 is provided inside the first air inlet passage 1.1 of the upper cover plate 1 for easy disassembly and installation, and the air damping module 1.1.3 is connected to the circular air passage 1.1.1 by threads. An air damping module 1.2.3 is provided inside the second air inlet passage 1.2 for easy disassembly and installation, and the air damping module 1.2.3 is connected to the circular air passage 1.2.1 by threads. The installation of the air damping module enables the air spring to provide a secondary damping effect at the same time, which can replace the function of the secondary vertical shock absorber on the bogie, so that the secondary vertical shock absorber can be eliminated on the bogie.

[0039] A first positioning pin 1.3 and a second positioning pin 1.4 are arranged on the upper cover plate 1 for positioning and connecting the air spring with the vehicle body.

[0040] like Figure 4 , Figure 6 As shown, the upper cover plate 1 is configured as a circle as a whole and has a left-right symmetrical structure. The left and right air springs installed on the bogie are interchangeable, and the height valve of the bogie can be arbitrarily arranged inside and outside the frame side beam.

[0041] The upper cover plate 1 is a "concave" structure 1.5 with a thick circumference and a thin middle. Since the airway is to be set on the outer circumference of the upper cover plate 1, the plate is relatively thick, and the middle circular surface is processed into a thin plate, so that the inner side of the upper cover plate 1 is a "concave" structure 1.5 as a whole. At the same time, the design of this "concave" structure 1.5 ensures the required air gap height of the air spring, saves the vertical installation space of the air spring, saves the thickness of the upper cover plate, and realizes a lightweight design.

[0042] When the present invention is used, the air inside the airbag 2 first passes through the elliptical air passage 1.1.1 in the first air inlet passage 1.1, then passes through the damping hole on the air damping valve block 1.1.3, and finally enters the auxiliary air chamber (not shown) through the circular air passage 1.1.2 and the air pipeline connected thereto. Conversely, the air in the auxiliary air chamber reaches the circular air passage 1.1.2 through the air pipeline, and then returns to the airbag 2 through the elliptical air passage 1.1.1. In this way, the present invention can reduce the vertical stiffness of the air spring and provide better comfort performance for the vehicle by exchanging air between the airbag 2 and the auxiliary air chamber. The second air inlet passage 1.2 is connected to the height valve pipeline through the end joint, which is used to control the inflation and deflation of the air spring when the vehicle changes due to load.

[0043] Thus, the air spring of the present invention adopts the ventilation mode of the left and right sides (the first and second air inlet channels) instead of the original vertical ventilation mode (upper air inlet), that is, the first and second air inlet channels on both sides of the present invention are directly connected to the auxiliary air chamber and the height valve, and the bolster of the vehicle bottom frame does not need to consider the installation interface and bolster plug-in that are connected with the top air inlet of the traditional air spring. In this way, the universality problem of the vehicle body when the bogie air spring adopts different installation spans can be solved.

[0044] Obviously, the air spring of the present invention is not limited to the above-mentioned form, and can also be changed as follows:

[0045] 1) The first and second air inlet channels on the upper cover plate 1 are not limited to two, and multiple channels may be provided according to functional requirements.

[0046] 2) The cross-sectional shapes of the first and second air inlet passages are not limited to elliptical or circular, and may also be other shapes such as rectangular or square.

[0047] The above is only a specific implementation scheme of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the art can make many possible changes and modifications to the technical scheme of the present invention by using the technical content disclosed above without departing from the scope of the technical scheme of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical scheme of the present invention should fall within the protection scope of the technical scheme of the present invention.

Claims

1. An urban rail vehicle bogie air spring, comprising an upper cover plate (1), an air bag (2) and an auxiliary spring (3), characterized in that: A first air intake channel (1.1) and a second air intake channel (1.2) are arranged on the side of the upper cover plate, the first air intake channel and the second air intake channel are respectively connected to the airbag, the first air intake channel is used to connect to the auxiliary air chamber on the vehicle, and the second air intake channel is used to connect to the height valve pipeline.

2. The urban rail vehicle bogie air spring according to claim 1, characterized in that: The top surface of the auxiliary spring is substantially flush with the bottom surface of the upper cover plate, and the upper cover plate as a whole is configured as a concave structure (1.5) that is thick at the periphery and thin in the middle, and a deformation gap is formed between the concave structure and the auxiliary spring.

3. The urban rail vehicle bogie air spring according to claim 1, characterized in that: The first air inlet channel and the second air inlet channel respectively include a front section serving as a connecting interface and a rear section serving as a connecting pipeline, the front section is configured as a circular airway, and the rear section is configured as an elliptical airway, one end of the elliptical airway is connected to the circular airway, and the other end is connected to the airbag, and a cross-sectional area of ​​the elliptical airway is equal to a cross-sectional area of ​​the circular airway.

4. The urban rail vehicle bogie air spring according to claim 1, characterized in that: An air damping module (1.1.3) is arranged inside the circular air passage.

5. The urban rail vehicle bogie air spring according to claim 1, characterized in that: A first positioning pin (1.3) and a second positioning pin (1.4) are provided on the top surface of the upper cover plate.

6. The urban rail vehicle bogie air spring according to claim 1, characterized in that: The upper cover plate is a left-right symmetrical structure.

7. A method for installing an air spring for a bogie of an urban rail vehicle according to any one of claims 1 to 6, characterized in that: The upper cover plate is installed in cooperation with the vehicle body frame, the auxiliary spring is installed in cooperation with the bogie frame, the first air intake channel is directly connected to the auxiliary air chamber on the vehicle through an air pipeline, and the second air intake channel is connected to the height valve pipeline through an end joint.

8. The method for installing an air spring for a bogie of an urban rail vehicle according to claim 7, characterized in that: The vehicle body underframe is provided with a positioning hole, the upper cover is provided with a positioning pin, and the positioning pin on the upper cover is inserted into the positioning hole on the vehicle body underframe.

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