Auxiliary frame, air suspension and automobile with auxiliary frame and air suspension

Abstract

The utility model relates to the technical field of automobiles, in particular to an auxiliary frame, an air suspension and an automobile. An auxiliary frame comprises a first cross beam, a first longitudinal beam, a second cross beam and a second longitudinal beam which are sequentially connected end to end. The auxiliary frame is characterized by further comprising a first connecting piece used for connecting the tail portion of the first cross beam and the head portion of the first longitudinal beam. The air storage chamber comprises a first air chamber, a second air chamber and a first air channel, the first air chamber is arranged in the first cross beam, and the second air chamber is arranged in the first longitudinal beam; the first air passage is arranged in the first connecting piece, and the first air passage is respectively communicated with the first air chamber and the second air chamber; the air inlet is formed in the auxiliary frame, is communicated with the air storage chamber and is used for air intake of the air storage chamber; and the air outlet is formed in the auxiliary frame, is communicated with the air storage chamber and is used for discharging air from the air storage chamber. The utility model provides an auxiliary frame integrating an air cylinder on the auxiliary frame, an air suspension and an automobile with the air suspension.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly to a subframe, an air suspension and an automobile thereof. Background Art

[0002] Existing air suspension systems require an air storage tank whether it is a closed-loop system or an open-loop system. However, the arrangement of the air storage tank has the following disadvantages:

[0003] 1. The air storage tank is connected to the vehicle body through brackets to store the air of the system to meet the lifting of the vehicle body. The air storage tank has a large volume and heavy weight, which is not conducive to the endurance of the whole vehicle.

[0004] 2. The air suspension system has a large number of components and complex assembly processes, resulting in low production efficiency.

[0005] 3. In order to increase the space of the passenger compartment, new energy passenger vehicles are equipped with large-capacity batteries, and their shapes tend to have short front and rear overhangs, which greatly increases the difficulty of arranging the air storage tank, and the volume of the air storage tank is limited. Utility Model Content

[0006] Based on this, it is necessary to provide a subframe, an air suspension and an automobile thereof that integrate the air storage tank onto the subframe.

[0007] A subframe includes a first cross beam, a first longitudinal beam, a second cross beam, and a second longitudinal beam that are sequentially connected end to end. The subframe is characterized in that the subframe further includes:

[0008] A first connecting member for connecting the tail of the first cross beam and the head of the first longitudinal beam;

[0009] An air storage chamber, including a first air chamber, a second air chamber, a first air passage, an air inlet, and an air outlet. The first air chamber is arranged in the first cross beam, and the second air chamber is arranged in the first longitudinal beam; the first air passage is arranged in the first connecting member, and the first air passage is respectively communicated with the first air chamber and the second air chamber; the air inlet is communicated with the first air chamber for the air inlet of the air storage chamber; the air outlet is communicated with the second air chamber for the air outlet of the air storage chamber.

[0010] In one embodiment, the first cross beam is a hollow structure to form the first air chamber in the first cross beam; the first longitudinal beam is a hollow structure to form the second air chamber in the first longitudinal beam.

[0011] In one embodiment, the subframe further includes a second connecting member for connecting the tail of the first longitudinal beam and the head of the second cross beam; the air storage chamber further includes a third air chamber and a second air passage. The third air chamber is arranged in the second cross beam, and the second air passage is arranged in the second connecting member, and the second air passage is respectively communicated with the second air chamber and the third air chamber.

[0012] In one embodiment, the subframe further includes a third connecting member for connecting the tail of the second cross member and the head of the second longitudinal member; the air storage chamber further includes a fourth air chamber and a third air passage. The fourth air chamber is disposed within the second longitudinal member, and the third air passage is disposed within the third connecting member. The third air passage is in communication with the third air chamber and the fourth air chamber respectively.

[0013] In one embodiment, the second cross member is a hollow structure to form the third air chamber within the second cross member; the second longitudinal member is a hollow structure to form the fourth air chamber within the second longitudinal member.

[0014] In one embodiment, the subframe further includes a fourth connecting member for connecting the tail of the second longitudinal member and the head of the first cross member; the air storage chamber further includes a fourth air passage. The fourth air passage is disposed within the fourth connecting member, and the fourth connecting member is in communication with the fourth air chamber and the first air chamber respectively.

[0015] In one embodiment, the air inlet is disposed on the first connecting member, and the air outlet is disposed on the fourth connecting member.

[0016] In one embodiment, a first insertion groove is provided on the first connecting member, and a second insertion groove is provided on the fourth connecting member; one end of the first cross member is inserted into the first insertion groove, and the other end is inserted into the second insertion groove; and a first transition cavity is formed by enclosing between the inner wall of the first insertion groove and the end wall of the first cross member, and a second transition cavity is formed by enclosing between the inner wall of the second insertion groove and the end wall of the first cross member; the air inlet is in communication with the first transition cavity, and the air outlet is in communication with the second transition cavity.

[0017] In one embodiment, first inclined surfaces and second inclined surfaces are respectively provided at both ends of the first cross member, and the positions of the first inclined surface and the second inclined surface respectively correspond to the positions of the air inlet and the air outlet.

[0018] In one embodiment, suspension mounting portions are respectively provided on the first cross member and the second cross member; lateral stabilizer bar mounting portions are respectively provided on the third connecting member and the fourth connecting member.

[0019] In one embodiment, steering gear mounting portions are respectively provided on the first longitudinal member, the second longitudinal member, the first connecting member, and the fourth connecting member; suspension arm mounting portions and body connection portions are respectively provided on the first connecting member, the second connecting member, the third connecting member, and the fourth connecting member.

[0020] The present application further provides an air suspension, including the subframe as described in any one of the above embodiments.

[0021] The present application also provides an automobile, including a subframe as described in any one of the above embodiments.

[0022] Compared with the prior art, the subframe stores system gas in each gas chamber to meet the body lifting, realizes the integration of the air storage tank and the subframe, reduces the system weight, and improves the vehicle endurance. At the same time, the air storage tank parts are cancelled, the assembly process is simple, and the production efficiency is high; moreover, the problems of difficult arrangement of the air storage tank and limited volume of the air storage tank are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the subframe provided by the present application.

[0025] Figure 2 is Figure 1 a cross-sectional view taken along line A-A in

[0026] Figure 3 It is a front view schematic diagram of the subframe provided by the present application.

[0027] Figure 4 is Figure 3 a cross-sectional view taken along line B-B in

[0028] Figure 5 It is a bottom view schematic diagram of the subframe provided by the present application.

[0029] Reference numerals: 11, first cross beam; 12, first longitudinal beam; 13, second cross beam; 14, second longitudinal beam; 21, first connecting member; 22, second connecting member; 23, third connecting member; 24, fourth connecting member; 30, gas chamber; 31, first gas chamber; 32, second gas chamber; 33, third gas chamber; 34, fourth gas chamber; 35, first air duct; 36, second air duct; 37, third air duct; 38, fourth air duct; 41, air inlet; 42, air outlet; 51, first insertion slot; 52, second insertion slot; 53, first transition cavity; 54, second transition cavity; 131, first inclined surface; 132, second inclined surface; 61, mounting portion for suspension; 62, mounting portion for anti-roll bar; 63, mounting portion for steering gear; 64, mounting portion for suspension arm; 65, body connection portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0035] Please refer to Figures 1 to 5, this application provides a subframe, which includes a first crossbeam 11, a first longitudinal beam 12, a second crossbeam 13, and a second longitudinal beam 14 that are connected end to end in sequence. Further, the subframe further includes a first connecting member 21 and an air storage chamber 30. The first connecting member 21 is used to connect the tail of the first crossbeam 11 and the head of the first longitudinal beam 12. The air storage chamber 30 includes a first air chamber 31, a second air chamber 32, a first air passage 35, an air inlet 41, and an air outlet 42. Among them, the first air chamber 31 is arranged in the first crossbeam 11, and the second air chamber 32 is arranged in the first longitudinal beam 12; the first air passage 35 is arranged in the first connecting member 21, and the first air passage 35 is respectively connected to the first air chamber 31 and the second air chamber 32. The air inlet 41 is connected to the first air chamber 31 for the air intake of the air storage chamber 30. The air outlet 42 is connected to the second air chamber 32 for the air outlet of the air storage chamber 30.

[0036] It can be understood that by directly forming the first air chamber 31 and the second air chamber 32 on the subframe, and connecting the first air chamber 31 and the second air chamber 32 through the first air passage 35, an air storage chamber 30 is formed inside the subframe. And the gas can enter the air storage chamber 30 from the air inlet 41, and the gas can be sent out from the air outlet 42. It effectively replaces the air storage cylinder for storing gas and cancels the air storage cylinder. Furthermore, it effectively reduces the system weight, increases the endurance, solves the problems of difficult arrangement of the air storage cylinder and limited volume of the air storage cylinder, and reduces the assembly process and improves the production efficiency.

[0037] It can be understood that the first air chamber 31 and the second air chamber 32 are connected through the first air passage 35, and the first air passage 35 is arranged in the first connecting member 21, so that there are no exposed pipeline components outside the subframe. The installation of the subframe is not restricted by the pipeline, the installation is more convenient, and the overall shape is more beautiful. And there will be no situation such as the pipeline falling off and deflating, which improves the service life.

[0038] In an embodiment, the subframe further includes a second connecting member 22, and the second connecting member 22 is used to connect the tail of the first longitudinal beam 12 and the head of the second crossbeam 13.

[0039] Further, the air storage chamber 30 further includes a third air chamber 33 and a second air passage 36. The third air chamber 33 is arranged in the second crossbeam 13, the second air passage 36 is arranged in the second connecting member 22, and the second air passage 36 is respectively connected to the second air chamber 32 and the third air chamber 33. Without affecting the assembly, the air storage space is further increased.

[0040] In an embodiment, the air storage chamber 30 further includes a fourth air chamber 34 and a third air passage 37. The fourth air chamber 34 is arranged in the second longitudinal beam 14, the third air passage 37 is arranged in the third connecting member 23, and the third air passage 37 is respectively connected to the third air chamber 33 and the fourth air chamber 34. Without affecting the assembly, the air storage space is further increased.

[0041] Further, the subframe further includes a third connecting member 23 for connecting the tail of the second cross beam 13 and the head of the second longitudinal beam 14.

[0042] In one embodiment, the air storage chamber 30 further includes a fourth air passage 38 provided in the fourth connecting member 24, and the fourth connecting member 24 is respectively communicated with the fourth air chamber 34 and the first air chamber 31. Without affecting the assembly, the air storage space is further increased.

[0043] Further, the subframe further includes a fourth connecting member 24 for connecting the tail of the second longitudinal beam 14 and the head of the first cross beam 11.

[0044] Exemplarily, the first connecting member 21, the second connecting member 22, the third connecting member 23, and the fourth connecting member 24 can be formed with a first air passage 35, a second air passage 36, a third air passage 37, and a fourth air passage 38 inside by means of cutting, die-casting, etc.

[0045] Of course, it is not limited to this. In other embodiments, other processing methods can also be adopted as long as the groove can be opened inside the connecting member.

[0046] In this embodiment, the connection between the first cross beam 11 and the first connecting member 21 and the fourth connecting member 24 is by welding, with a tight connection and not likely to have gas leakage.

[0047] Of course, it is not limited to this. In other embodiments, other connection methods can also be adopted between the first cross beam 11 and the first connecting member 21 and the fourth connecting member 24 as long as the sealing connection between the two can be achieved, which will not be elaborated here.

[0048] In this embodiment, the connection between the first longitudinal beam 12 and the first connecting member 21 and the second connecting member 22 is by welding, with a tight connection and not likely to have gas leakage.

[0049] Of course, it is not limited to this. In other embodiments, other connection methods can also be adopted between the first longitudinal beam 12 and the first connecting member 21 and the second connecting member 22 as long as the sealing connection between the two can be achieved, which will not be elaborated here.

[0050] In this embodiment, the connection between the second cross beam 13 and the second connecting member 22 and the third connecting member 23 is by welding, with a tight connection and not likely to have gas leakage.

[0051] Of course, it is not limited to this. In other embodiments, other connection methods can also be adopted between the second cross beam 13 and the second connecting member 22 and the third connecting member 23 as long as the sealing connection between the two can be achieved, which will not be elaborated here.

[0052] In this embodiment, the connection between the second longitudinal beam 14 and the third connecting member 23 and the fourth connecting member 24 is by welding, with a tight connection and less likely to have gas leakage.

[0053] Of course, it is not limited to this. In other embodiments, other connection methods may also be adopted between the second longitudinal beam 14 and the third connecting member 23 and the fourth connecting member 24, as long as the sealed connection between the two can be achieved, which will not be elaborated here.

[0054] Exemplarily, the first cross beam 11 is a hollow structure to form a first air chamber 31 inside the first cross beam 11. It is convenient for processing, has high production efficiency, and meets the lightweight requirement.

[0055] Of course, it is not limited to this. In other embodiments, the first air chamber 31 can also be processed by other methods, as long as a cavity can be formed inside the subframe to store gas.

[0056] Preferably, the first longitudinal beam 12 is a hollow structure to form a second air chamber 32 inside the first longitudinal beam 12. It is convenient for processing, has high production efficiency, and meets the lightweight requirement.

[0057] Of course, it is not limited to this. In other embodiments, the second air chamber 32 can also be processed by other methods, as long as a cavity can be formed inside the subframe to store gas.

[0058] Exemplarily, the second cross beam 13 is a hollow structure to form a third air chamber 33 inside the second cross beam 13. It is convenient for processing, has high production efficiency, and meets the lightweight requirement.

[0059] Of course, it is not limited to this. In other embodiments, the third air chamber 33 can also be processed by other methods, as long as a cavity can be formed inside the subframe to store gas.

[0060] Preferably, the second longitudinal beam 14 is a hollow structure to form a fourth air chamber 34 inside the second longitudinal beam 14. It is convenient for processing, has high production efficiency, and meets the lightweight requirement.

[0061] Of course, it is not limited to this. In other embodiments, the fourth air chamber 34 can also be processed by other methods, as long as a cavity can be formed inside the subframe to store gas.

[0062] Furthermore, the air inlet 41 is provided on the first connecting member 21, and the air outlet 42 is provided on the fourth connecting member 24.

[0063] It can be understood that since the first cross beam 11, the first longitudinal beam 12, the second cross beam 13, and the second longitudinal beam 14 are connected end to end through the first connector 21, the second connector 22, the third connector 23, and the fourth connector 24. And the first air chamber 31, the second air chamber 32, the third air chamber 33, and the fourth air chamber 34 in the first cross beam 11, the first longitudinal beam 12, the second cross beam 13, and the second longitudinal beam 14 are interconnected through the first air duct 35, the second air duct 36, the third air duct 37, and the fourth air duct 38 in the first connector 21, the second connector 22, the third connector 23, and the fourth connector 24, and thus the entire subframe becomes the air storage chamber 30.

[0064] That is, the first connector 21 becomes the head of the entire air storage chamber 30, and the fourth connector 24 becomes the tail of the entire air storage chamber 30. Further, the air inlet 41 is provided on the first connector 21, and the air outlet 42 is provided on the fourth connector 24, so that gas can enter from the head of the air storage chamber 30 and exit from the tail of the air storage chamber 30, ensuring that the entire air storage chamber 30 is fully utilized.

[0065] Of course, it is not limited to this. In other embodiments, several of the first air chamber 31, the second air chamber 32, the third air chamber 33, and the fourth air chamber 34 can be selected for setting according to actual needs.

[0066] For example, only the first air chamber 31 and the second air chamber 32 are set, and the third air chamber 33 and the fourth air chamber 34 are not set. Or only the first air chamber 31, the second air chamber 32, and the third air chamber 33 are set, and the fourth air chamber 34 is not set, etc. There are various specific selection methods and will not be elaborated here.

[0067] Furthermore, in other embodiments, several of the first air duct 35, the second air duct 36, the third air duct 37, and the fourth air duct 38 can also be selected for setting according to actual needs.

[0068] For example, only the first air duct 35 and the third air duct 37 are set, and the second air duct 36 and the fourth air duct 38 are cancelled, as long as the first air chamber 31 and the second air chamber 32 are interconnected, and the third air chamber 33 and the fourth air chamber 34 are interconnected. There are various specific selection methods and will not be elaborated here.

[0069] Furthermore, a first insertion slot 51 is provided on the side of the first connector 21 close to the first cross beam 11, and one end of the first cross beam 11 is in plug-in fit with the first insertion slot 51. A second insertion slot 52 is provided on the side of the fourth connector 24 close to the first cross beam 11, and the other end of the first cross beam 11 is plugged into the second insertion slot 52.

[0070] Among them, a first transition cavity 53 is formed by enclosing between the inner wall of the first socket groove 51 and the end wall of the first cross beam 11, and the first air duct 35 is communicated with the first transition cavity 53. A second transition cavity 54 is formed by enclosing between the inner wall of the second socket groove 52 and the end wall of the first cross beam 11, and the fourth air duct 38 is communicated with the second transition cavity 54.

[0071] Further, the air inlet 41 is communicated with the first transition cavity 53, and the air outlet 42 is communicated with the second transition cavity 54.

[0072] It can be understood that the gas entering from the air inlet 41 will first pass through the first transition cavity 53 and then be delivered to the gas storage chamber 30. The gas undergoes a buffer, making the intake flow rate and intake speed of the gas storage chamber 30 more stable.

[0073] Similarly, the gas exiting from the air outlet 42 will first pass through the second transition cavity 54 and then be delivered outwards. The gas undergoes a buffer, making the outlet flow rate and outlet speed of the air outlet 42 more stable.

[0074] Preferably, first inclined surfaces 131 and second inclined surfaces 132 are respectively provided at both ends of the first cross beam 11, and the positions of the first inclined surfaces 131 and the second inclined surfaces 132 respectively correspond to the positions of the air inlet 41 and the air outlet 42. Through the setting of the inclined surfaces, the space sizes of the first transition cavity 53 and the second transition cavity 54 are increased, further improving the air flow stability.

[0075] Secondly, the existence of the inclined surfaces can also directly make way for the air inlet 41 and the air outlet 42, so that there is no need to open holes on the first cross beam 11, and the processing procedure is simpler.

[0076] In other embodiments, the two ends of the first longitudinal beam 12, the second cross beam 13, and the second longitudinal beam 14 can also be set as inclined surfaces to increase the number of transition cavities.

[0077] Further, suspension mounting parts 61 are respectively provided on the first cross beam 11 and the second cross beam 13, and the suspension can be connected to the suspension mounting parts 61. The connection method between the two can be selected according to actual needs and will not be elaborated here.

[0078] Specifically, in the vehicle body height direction, the suspension mounting parts 61 are provided on one side of the top surfaces of the first cross beam 11 and the second cross beam 13.

[0079] Further, lateral stabilizer bar mounting parts 62 are respectively provided on the third connecting member 23 and the fourth connecting member 24, and the lateral stabilizer bar can be connected to the lateral stabilizer bar mounting parts 62. The connection method between the two can be selected according to actual needs and will not be elaborated here.

[0080] Specifically, in the vehicle body height direction, the lateral stabilizer bar mounting portion 62 is provided on one side of the bottom surfaces of the third connecting member 23 and the fourth connecting member 24.

[0081] Furthermore, steering gear mounting portions 63 are respectively provided on the first longitudinal beam 12, the second longitudinal beam 14, the first connecting member 21, and the fourth connecting member 24. The steering gear can be connected to the steering gear mounting portion 63. The connection manner between the two can be selected according to actual needs and will not be elaborated herein.

[0082] Specifically, in the vehicle body height direction, the steering gear mounting portion 63 is provided on one side of the bottom surfaces of the first longitudinal beam 12, the second longitudinal beam 14, the first connecting member 21, and the fourth connecting member 24.

[0083] Furthermore, suspension arm mounting portions 64 and vehicle body connection portions 65 are respectively provided on the first connecting member 21, the second connecting member 22, the third connecting member 23, and the fourth connecting member 24. The suspension arm can be connected to the suspension arm mounting portion 64. The connection manner between the two can be selected according to actual needs and will not be elaborated herein.

[0084] Furthermore, the subframe is connected to the vehicle body through the vehicle body connection portion 65. The connection manner between the two can be selected according to actual needs and will not be elaborated herein. Preferably, the vehicle body connection portion 65 is provided at the four corners of the subframe.

[0085] This application also provides an air suspension, including the subframe of any one of the above embodiments.

[0086] This application also provides a vehicle, including the subframe of any one of the above embodiments.

[0087] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0088] The above-described embodiments merely represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application shall be subject to the appended claims.

Claims

1. A subframe, comprising a first cross beam (11), a first longitudinal beam (12), a second cross beam (13), and a second longitudinal beam (14) connected end to end in sequence; characterized in that: The subframe also includes: A first connecting member (21) for connecting the tail of the first cross beam (11) and the head of the first longitudinal beam (12); The air storage chamber (30) comprises a first air chamber (31), a second air chamber (32), a first air duct (35), an air inlet (41) and an air outlet (42); the first air chamber (31) is arranged in a first cross beam (11), and the second air chamber (32) is arranged in a first longitudinal beam (12); the first air duct (35) is arranged in a first connecting member (21), and the first air duct (35) is respectively connected to the first air chamber (31) and the second air chamber (32); the air inlet (41) is connected to the first air chamber (31) and is used for air intake of the air storage chamber (30); the air outlet (42) is connected to the second air chamber and is used for air outlet of the air storage chamber (30).

2. The subframe according to claim 1, characterized in that: The first cross beam (11) is a hollow structure so as to form the first air chamber (31) inside the first cross beam (11); the first longitudinal beam (12) is a hollow structure so as to form the second air chamber (32) inside the first longitudinal beam (12).

3. The subframe according to claim 1, characterized in that: The subframe further comprises a second connecting member (22), the second connecting member (22) being used to connect the rear portion of the first longitudinal beam (12) and the front portion of the second cross beam (13); the air storage chamber (30) further comprises a third air chamber (33) and a second air duct (36), the third air chamber (33) being arranged in the second cross beam (13), the second air duct (36) being arranged in the second connecting member (22), and the second air duct (36) being respectively connected to the second air chamber (32) and the third air chamber (33).

4. The subframe according to claim 3, characterized in that: The subframe further comprises a third connecting member (23), the third connecting member (23) being used to connect the rear portion of the second cross beam (13) and the front portion of the second longitudinal beam (14); the air storage chamber (30) further comprises a fourth air chamber (34) and a third air duct (37), the fourth air chamber (34) being arranged in the second longitudinal beam (14), the third air duct (37) being arranged in the third connecting member (23), and the third air duct (37) being respectively connected to the third air chamber (33) and the fourth air chamber (34).

5. The subframe according to claim 4, characterized in that: The second cross beam (13) is a hollow structure so as to form the third air chamber (33) inside the second cross beam (13); the second longitudinal beam (14) is a hollow structure so as to form the fourth air chamber (34) inside the second longitudinal beam (14).

6. The subframe according to claim 4, characterized in that: The subframe further comprises a fourth connecting member (24), the fourth connecting member (24) being used to connect the rear portion of the second longitudinal beam (14) and the front portion of the first cross beam (11); the air storage chamber (30) further comprises a fourth air passage (38), the fourth air passage (38) being arranged in the fourth connecting member (24), and the fourth connecting member (24) being respectively connected to the fourth air chamber (34) and the first air chamber (31).

7. The subframe according to claim 6, characterized in that: The air inlet (41) is provided on the first connecting member (21), and the air outlet (42) is provided on the fourth connecting member (24).

8. The subframe according to claim 6, characterized in that: The first connecting member (21) is provided with a first plug-in slot (51), and the fourth connecting member (24) is provided with a second plug-in slot (52); one end of the first cross beam (11) is plugged into the first plug-in slot (51), and the other end is plugged into the second plug-in slot (52); a first transition cavity (53) is formed between the inner wall of the first plug-in slot (51) and the end wall of the first cross beam (11), and a second transition cavity (54) is formed between the inner wall of the second plug-in slot (52) and the end wall of the first cross beam (11); the air inlet (41) is connected to the first transition cavity (53), and the air outlet (42) is connected to the second transition cavity (54).

9. The subframe according to claim 8, characterized in that: A first inclined surface (131) and a second inclined surface (132) are respectively provided at both ends of the first crossbeam (11), and the positions of the first inclined surface (131) and the second inclined surface (132) correspond to the positions of the air inlet (41) and the air outlet (42), respectively.

10. The subframe according to claim 6, characterized in that: The first cross beam (11) and the second cross beam (13) are respectively provided with a suspension mounting portion (61); the third connecting member (23) and the fourth connecting member (24) are respectively provided with a transverse stabilizer bar mounting portion (62).

11. The subframe according to claim 6, characterized in that: A steering gear mounting portion (63) is provided on the first longitudinal beam (12), the second longitudinal beam (14), the first connecting member (21), and the fourth connecting member (24), respectively; a suspension arm mounting portion (64) and a vehicle body connecting portion (65) are provided on the first connecting member (21), the second connecting member (22), the third connecting member (23), and the fourth connecting member (24), respectively.

12. An air suspension, characterized in that: It comprises a subframe as described in any one of claims 1 to 11 above.

13. A car, characterized in that: It comprises a subframe as described in any one of claims 1 to 11 above.

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