Urban rail vehicle bogie air spring and installation method thereof

Abstract

The application discloses a kind of urban rail vehicle bogie air spring and its installation method, including upper cover plate (1), air bag (2) and auxiliary spring (3), the side of the upper cover plate is provided with first air inlet channel (1.1) and second air inlet channel (1.2), the first air inlet channel and the second air inlet channel are communicated with the air bag respectively, the first air inlet channel is used to connect auxiliary air chamber on vehicle, and the second air inlet channel is used to be connected with height valve pipeline.The first air inlet channel and the second air inlet channel of the upper cover plate two sides are directly connected to auxiliary air chamber and height valve, and the bogie pillow beam connected with it does not need to consider the installation interface and pillow beam insert matched with air spring air inlet, and then the universality problem of vehicle body when bogie air spring uses different installation span can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to rail transit vehicles, in particular to an air spring for a metro vehicle bogie and a mounting method thereof. BACKGROUND

[0002] The air spring is a main bearing and damping component for the secondary suspension of a metro vehicle bogie or a motor train unit bogie. Figure 1 As shown in the figure, the conventional air spring mainly comprises an upper cover plate 1, an air bag 2 and an auxiliary spring 3, and the top of the upper cover plate 1 is provided with an air inlet 11. Figure 2 As shown in the figure, the air spring is mounted between a vehicle body underframe 4 and a bogie frame 5, wherein the upper cover plate 1 is connected to a bolster beam on the vehicle body underframe 4, and the air inlet 11 is in communication with an auxiliary air chamber through a bolster beam insert 41 and an air pipe. For the air spring provided with an independent auxiliary air chamber, the existing bogie air spring and the auxiliary air chamber usually adopt the above-mentioned top vertical ventilation mode.

[0003] The air spring vertical ventilation mode has been widely used in mature metro platforms, but for a newly designed small-space axle box built-in bogie project, the above-mentioned communication scheme has the following problems: due to the very compact space 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 conventional bogie air spring. Due to the reduction of the lateral installation span of the left and right air springs, the installation interface of the bogie and the vehicle body underframe is also changed, which requires that the bolster beam structure on the vehicle body underframe which is connected with the air spring air inlet must be redesigned. SUMMARY

[0004] The technical problem to be solved by the present application is that the existing air spring is not suitable for different lateral spans, and the present application provides an air spring for a metro vehicle bogie and a mounting method thereof.

[0005] To solve the above-mentioned technical problem, the present application adopts the following technical scheme:

[0006] An air spring for a metro vehicle bogie, comprising an upper cover plate, an air bag and an auxiliary spring, characterized in that: a first air inlet channel and a second air inlet channel are arranged on the side of the upper cover plate, the first air inlet channel and the second air inlet channel are respectively in communication with the air bag, the first air inlet channel is used for connecting an auxiliary air chamber on the vehicle, and the second air inlet channel is used for connecting with a height valve pipe.

[0007] The air spring of the present application adopts a lateral ventilation mode to replace the vertical ventilation structure of the conventional air spring, and the air spring no longer needs to be connected to the auxiliary air chamber through the pillow beam insert installed in the pillow beam, but is directly connected to the auxiliary air chamber through the lateral air pipeline connected with the first and second air inlet channels, so that the air spring no longer needs to be redesigned when it is installed in different lateral installation spans, thereby ensuring the universality 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 is integrally provided as a concave structure with a thick periphery and a thin middle portion, and a deformation gap is formed between the concave structure and the auxiliary spring, so that the air gap height of the air spring is not affected under the premise of being installed in an extremely narrow installation gap.

[0009] Preferably, the first air inlet channel and the second air inlet channel each include a front section as a connection interface and a rear section as a connection pipeline, the front section is provided as a circular air duct, the rear section is provided as an elliptical air duct, one end of the elliptical air duct is connected to the circular air duct, the other end of the elliptical air duct is connected to the air bag, and the cross-sectional area of the elliptical air duct is equal to the cross-sectional area of the circular air duct. In this way, the elliptical air duct adopted by the present application has a flat structure and occupies less vertical space, so it can be adapted to an extremely narrow installation gap, and the circular air duct can be connected to the straight-through connector 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 action and replace the function of the secondary vertical damper, and the bogie can cancel the secondary vertical damper.

[0011] Preferably, the top surface of the upper cover plate is provided with a first positioning pin and a second positioning pin for positioning and connecting the air spring and 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 arranged on the inside or outside of the side beam of the bogie frame.

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

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

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1) The air spring of the present application adopts a lateral venting mode instead of a vertical venting mode, the air inlet of the air spring no longer needs to be connected with the pillow beam through a pillow beam insert, and the pillow beam does not need to be provided with an air spring air inlet mounting interface, so that on the one hand, the vehicle body can be adapted to different air spring installation spans by flexibly adjusting the arrangement of the air pipe, thereby solving the problem of the universality of the vehicle body under different installation spans, and on the other hand, the pillow beam insert for connecting the air spring with the vehicle body chassis can be cancelled, thereby reducing the production and manufacturing cost of the vehicle body.

[0017] 2) The first and second air inlets of the air spring of the present application 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 that of the rear half of the circular air channel, so that the venting efficiency per unit time can be ensured, and the vertical installation space of the air spring can be saved by using the elliptical air channel.

[0018] 3) The upper cover plate of the present application is provided as a concave structure with a thick periphery and a thin middle, so that the air gap height of the air spring can be ensured in a limited height space, the vertical installation space of the air spring can be saved, the thickness of the plate material can be saved, and lightweight design can be realized.

[0019] 4) The air damping module is integrated and installed in the first and second air inlets of the present application, so that the air spring can provide a damping effect and can replace the function of the secondary vertical damper, and the bogie can cancel the secondary vertical damper. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0021] Figure 1 It is a structural schematic diagram of a traditional air spring.

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

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

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

[0025] Figure 5 It is a sectional view of A-A of Figure 4

[0026] ​Figure 6 Figure 1 is a schematic view of the bottom surface structure of the upper cover plate of the air spring of the present application.

[0027] Figure legend:

[0028] 1 multifunctional cover plate, 2 air bag, 3 auxiliary spring, 4 vehicle body frame, 5 bogie frame, 11 air inlet, 41 bolster insert;

[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 passage, 1.1.2 elliptical air passage, 1.1.3 air damping module, 1.2.1 circular air passage, 1.2.2 elliptical air passage, 1.2.3 air damping module. DETAILED DESCRIPTION

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

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As shown in Figure 3 An embodiment of the air spring of the present application mainly comprises an upper cover plate 1, an air bag 2, and an auxiliary spring 3. The upper cover plate 1 is mounted in cooperation with the vehicle body frame, and the auxiliary spring 3 is mounted in cooperation with the bogie frame.

[0035] As shown in Figure 4 , Figure 5As shown, the left side of the upper cover plate is provided with a first air inlet channel 1.1, and the right side is provided with a second air inlet channel 1.2. The first air inlet channel 1.1 is connected to the auxiliary air chamber on the vehicle through an air pipe, and the second air inlet channel 1.2 is connected to the height valve pipe through an end joint. In this way, the air spring of the present application enters and exits 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 duct 1.1.1, and the rear section is an elliptical air duct 1.1.2. The circular air duct 1.1.1 is connected to the elliptical air duct 1.1.2 by welding, and the cross-sectional area of the rear section of the circular air duct is designed to be equivalent to the cross-sectional area of the front section of the elliptical air duct. The elliptical air duct 1.1.2 is a flat structure that occupies less vertical space, and the circular air duct 1.1.1 is connected to a straight-through joint at the end of the air pipe.

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

[0038] The first air inlet channel 1.1 of the upper cover plate 1 is provided with an air damping module 1.1.3 for easy disassembly and installation. The air damping module 1.1.3 is connected to the circular air duct 1.1.1 by threading. The second air inlet channel 1.2 is provided with an air damping module 1.2.3 for easy disassembly and installation. The air damping module 1.2.3 is connected to the circular air duct 1.2.1 by threading. The installation of the air damping module enables the air spring to provide a secondary damping effect, replacing the function of the secondary vertical shock absorber on the bogie, so that the bogie can cancel the secondary vertical shock absorber.

[0039] The upper surface of the upper cover plate 1 is provided with a first positioning pin 1.3 and a second positioning pin 1.4 for positioning and connecting the air spring and the vehicle body.

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

[0041] The upper cover plate 1 is a "concave" structure 1.5 with thick circumference and thin middle, because the outer circumference of the upper cover plate 1 is provided with air passages, the plate is 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. Meanwhile, the design of the "concave" structure 1.5 ensures the air spring air gap height requirement, saves the vertical installation space of the air spring, saves the thickness of the upper cover plate, and realizes the lightweight design.

[0042] When the air bag 2 is used, the air in the air bag 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 in the figure) 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 air bag 2 through the elliptical air passage 1.1.1. In this way, the air exchange between the air bag 2 and the auxiliary air chamber can reduce the vertical stiffness of the air spring and provide better comfort performance for the vehicle. The second air inlet passage 1.2 is connected to the height valve pipeline through the end joint, and is used to control the inflation and deflation of the air spring when the load of the vehicle changes.

[0043] In this way, the air spring of the present application replaces the original vertical ventilation (upper air inlet) mode with the left and right ventilation modes (first and second air inlet passages), that is, the first and second air inlet passages of the present application are directly connected to the auxiliary air chamber and the height valve, and the vehicle bottom frame bolster does not need to consider the installation interface and the bolster plug for cooperation and connection with the traditional air spring top air inlet. 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 application is not limited to the above form, and the following changes can also be made:

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

[0046] 2) The cross-sectional shape of the first and second air inlet passages is not limited to an elliptical or circular shape, and can also be a rectangular or square shape or other shapes.

[0047] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application by using the disclosed technical content, or modify equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. An air spring for a bogie of an urban rail vehicle, 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 provided 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; the first air intake channel and the second air intake channel respectively include a front section as a connection interface and a rear section as a connection pipeline, the front section is provided as a circular air channel, and the rear section is provided 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.

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, with a deformation gap formed between the concave structure and the auxiliary spring.

3. 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 duct.

4. 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.

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

6. A method for installing an air spring on a bogie of an urban rail vehicle according to any one of claims 1 to 5, 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.

7. The method for installing an air spring on a bogie of an urban rail vehicle according to claim 6, characterized in that: The vehicle body chassis 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 chassis.

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