A subframe assembly and a vehicle

Abstract

This application discloses a subframe assembly and a vehicle. The subframe assembly includes two longitudinal beams arranged opposite to each other and spaced apart in a first direction, and two crossbeams arranged opposite to each other and spaced apart in a second direction. The two longitudinal beams are connected between the two crossbeams. At least one of the crossbeams includes an integrated gas tank, a connecting assembly, and two connecting pipes. The outer periphery of the two connecting pipes is connected to the same end of the two longitudinal beams and is spaced apart and opposite to each other in the first direction. The gas tank is located between the two connecting pipes and spaced apart from them. The connecting assembly includes a fastening tube and a pre-tightening tube, which are respectively sleeved on the outer periphery of a corresponding connecting pipe and the outer periphery of a corresponding end of the gas tank. This improves the integration of the gas tank and the subframe assembly, increases space utilization, enhances the structural strength and rigidity of the subframe assembly, and reduces the risk of damage to the subframe assembly under external forces.

Description

Technical Field

[0001] This application relates to the field of automotive suspension components technology, and in particular to a subframe assembly and vehicle. Background Technology

[0002] With the rapid development of automotive technology, the market demand for complete vehicles is also increasing. Among the challenges facing automotive design today are maximizing the usable floor space of the vehicle interior and improving the overall spatial structure utilization.

[0003] In existing technologies, integrating the air spring tank with the subframe beams can save overall vehicle layout space. However, the connection method between the air spring tank and the subframe is too simple, resulting in low structural strength of the subframe and susceptibility to damage. Summary of the Invention

[0004] The main objective of this application is to provide a subframe assembly and a vehicle, which aims to solve the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned issues, this application provides a subframe assembly comprising two longitudinal beams and two transverse beams. The two longitudinal beams are arranged opposite to each other and spaced apart in a first direction, and the two transverse beams are arranged opposite to each other and spaced apart in a second direction intersecting the first direction. The two longitudinal beams are connected between the two transverse beams. At least one of the transverse beams includes an integrated gas tank, a connecting assembly, and two connecting pipes. The outer periphery of the two connecting pipes is connected to the same end of the two longitudinal beams and is arranged spaced apart and opposite to each other in the first direction. The gas tank is located between the two connecting pipes and spaced apart from them. The connecting assembly includes a fastening tube and a pre-tightening tube, which are respectively sleeved on the outer periphery of a corresponding connecting pipe and the outer periphery of a corresponding end of the gas tank.

[0006] In some embodiments, the pretensioning tube includes a base and a telescopic tube. One end of the base is sleeved on the outer periphery of the corresponding connecting tube. The gas cylinder is spaced apart from the base in a first direction. The telescopic tube is connected to the end of the base near the gas cylinder, and the inner wall of the telescopic tube is screwed to the outer periphery of the base and the gas cylinder.

[0007] In some embodiments, the base includes a first segment and a second segment. The first segment is sleeved on a corresponding connecting pipe, and the second segment is connected to the end of the first segment near the gas tank. The second segment is spaced apart from the gas tank. In a first state, a telescopic tube is screwed to the outer periphery of the second segment and spaced apart from the gas tank. In a second state, the telescopic tube is screwed to the outer periphery of both the second segment and the gas tank.

[0008] In some embodiments, the inner wall of the fastening tube is screwed to the outer periphery of the gas cylinder.

[0009] In some embodiments, a first flange is provided on the outer periphery of the fastening tube, and a second flange is screwed onto the outer periphery of the gas tank near one end of the fastening tube, with the first flange and the second flange abutting against each other.

[0010] In some embodiments, the end of the fastening tube away from the gas tank is fixedly connected to a corresponding connecting tube by welding.

[0011] In some embodiments, the end of the pretensioner tube furthest from the gas tank is fixedly connected to a corresponding connecting tube by welding.

[0012] In some embodiments, at least one connecting pipe is provided with a first reinforcing section extending along a first direction. The first reinforcing section is located at one end near the gas tank. The first reinforcing section includes an arcuate portion and a protrusion disposed in a circumferential direction around the first direction. The two ends of the protrusion in the circumferential direction are connected to the two ends of the arcuate portion, and the protrusion protrudes outward relative to the arcuate portion.

[0013] In some embodiments, a second reinforcing section is provided corresponding to the fastening tube and / or pre-tightening tube of the first reinforcing section. The second reinforcing section is sleeved on the outer periphery of the first reinforcing section, and the inner surface of the second reinforcing section matches the outer surface of the first reinforcing section.

[0014] To address the aforementioned issues, this application also provides a vehicle that includes the aforementioned subframe assembly.

[0015] Compared with the prior art, the subframe assembly provided in this application includes two longitudinal beams and two crossbeams. The two longitudinal beams are arranged opposite to each other and spaced apart in a first direction, and the two crossbeams are arranged opposite to each other and spaced apart in a second direction intersecting the first direction. The two longitudinal beams are connected between the two crossbeams. At least one of the crossbeams includes an integrated air tank, a connecting assembly, and two connecting pipes. The outer periphery of the two connecting pipes is connected to the same end of the two longitudinal beams and is arranged spaced apart and opposite to each other in the first direction. The air tank is located between the two connecting pipes and spaced apart from them. The connecting assembly includes a fastening tube and a pre-tightening tube, which are respectively sleeved on the outer periphery of a corresponding connecting pipe and the outer periphery of a corresponding end of the air tank. Through the above embodiment, by integrating at least one crossbeam, the air tank and the crossbeam of the subframe are spatially integrated, which is beneficial to improving space utilization. The fastening tube and the pre-tightening tube are located between a connecting tube and the gas tank, respectively, and are sleeved on the outer periphery of the corresponding connecting tube and the outer periphery of the corresponding end of the gas tank. This allows the gas tank to be stably fixed between the two connecting tubes through the fastening tube and the pre-tightening tube, which can improve the structural strength and rigidity of the subframe assembly and reduce the risk of damage to the subframe assembly under external force. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a subframe assembly according to an embodiment of the present application; Figure 2 yes Figure 1 The diagram shows the disassembled structure of the subframe assembly. Figure 3 yes Figure 2 A disassembly diagram of one embodiment of the pre-tightening tube is shown; Figure 4 yes Figure 1 A magnified structural diagram of the area at point n (dashed box); Figure 5 yes Figure 2 A schematic diagram of one embodiment of the fastening tube and gas cylinder is shown; Figure 6 yes Figure 4 Sectional view along the AA direction.

[0018] Icon labels: Subframe assembly 10; longitudinal beam 100; crossbeam 200; air tank 210; second flange 211; connecting pipe 220; first reinforcing section 221; arc-shaped part 2211; protrusion 2212; connecting assembly 230; fastening pipe 231; first flange 2311; second reinforcing section 2312; pre-tightening pipe 232; base 2321; first section 2322; second section 2323; telescopic pipe 2324; first direction X; second direction Y. Detailed Implementation

[0019] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0021] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0025] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0027] With the rapid development of automotive technology, market demands for complete vehicles are increasing. Maximizing the usable floor space inside the vehicle and improving the overall spatial utilization of the vehicle design are among the current challenges in automotive design. Existing technologies integrate the air spring tank with the subframe beams to save overall vehicle layout space. However, the connection method between the air spring tank and the subframe is too simple, resulting in low structural strength and susceptibility to damage to the subframe.

[0028] To address the related technical problems, this application provides a vehicle that includes the following subframe assembly.

[0029] To address the related technical issues, this application also provides a subframe assembly, for details please refer to [link / reference needed]. Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of an embodiment of the subframe assembly provided in this application. Figure 2 yes Figure 1 The diagram shows the disassembled structure of the subframe assembly.

[0030] The subframe assembly 10 includes two longitudinal beams 100 and two crossbeams 200. The two longitudinal beams 100 are arranged opposite to each other and spaced apart in a first direction X. The two crossbeams 200 are arranged opposite to each other and spaced apart in a second direction Y that intersects with the first direction X. The two longitudinal beams 100 are connected between the two crossbeams 200. At least one of the crossbeams 200 includes an integrated air tank 210, a connecting component 230, and two connecting pipes 220. The outer periphery of the two connecting pipes 220 is connected to the same end of the two longitudinal beams 100 and is arranged spaced apart and opposite to each other in the first direction X. The air tank 210 is located between the two connecting pipes 220 and spaced apart from the two connecting pipes 220. The connecting component 230 includes a fastening tube 231 and a pre-tightening tube 232. The fastening tube 231 and the pre-tightening tube 232 are respectively sleeved on the outer periphery of a corresponding connecting pipe 220 and the outer periphery of a corresponding end of the air tank 210.

[0031] The first direction X refers to the left-right direction of the vehicle, and the second direction Y refers to the front-rear direction of the vehicle. Two longitudinal beams 100 extend along the second direction Y and are positioned opposite each other and spaced apart in the first direction X. Two transverse beams 200 extend along the first direction X and are positioned opposite each other and spaced apart in the second direction Y. The two longitudinal beams 100 are connected between the two transverse beams 200, thus forming a "well"-shaped frame structure for the subframe assembly 10. Both ends of the two transverse beams 200 in the first direction X are provided with socket frames for inserting bushings. The bushings are used to connect to the vehicle body, thereby connecting the subframe assembly 10 to the vehicle body. The bushings dampen vibrations at the connection between the subframe assembly 10 and the vehicle body and reduce the risk of noise generation.

[0032] At least one of the crossbeams 200 is integrated with the air tank 210, which stores compressed gas. The air tank 210 is connected to the air springs installed in the vehicle, providing compressed gas to the air springs to achieve shock absorption in the vehicle. The integrated crossbeam 200 includes the air tank 210, the connecting assembly 230, and two connecting pipes 220.

[0033] The connecting pipe 220 serves as the main structure connecting the crossbeam 200 and the longitudinal beam 100. Two connecting pipes 220 are connected to one longitudinal beam 100 respectively and are located at the same end of the two longitudinal beams 100. The two connecting pipes 220 being opposite and spaced apart in the first direction X means that each connecting pipe 220 has a first end and a second end. The first and second ends of the two connecting pipes 220 are spaced apart in the first direction X, with the first end being the end of the connecting pipe 220 furthest from the other connecting pipe 220 in the first direction X, and the second end being the end of the connecting pipe 220 closest to each other in the first direction X. The second segments of each of the two connecting pipes 220 are spaced apart in the first direction X, and the first end is provided with the aforementioned socket frame. A gas tank 210 is disposed between the two connecting pipes 220, with its two ends spaced apart from the two connecting pipes 220 in the first direction X. The connecting assembly 230 is used to connect the two connecting pipes 220 and the two ends of the gas tank 210 to achieve integration of the gas tank 210 with the crossbeam 200.

[0034] The connecting assembly 230 includes a fastening tube 231 and a pre-tightening tube 232. One end of the fastening tube 231 is sleeved on the outer periphery of one of the connecting tubes 220, and the other end of the fastening tube 231 in the first direction X is sleeved on the outer periphery of the gas tank 210 corresponding to the end of the fastening tube 231. One end of the pre-tightening tube 232 is sleeved on the outer periphery of the other connecting tube 220, and the other end of the pre-tightening tube 232 in the first direction X is sleeved on the outer periphery of the gas tank 210 corresponding to the end of the pre-tightening tube 232. This allows both ends of the gas tank 210 to be connected to the two connecting tubes 220 respectively through the fastening tube 231 and the pre-tightening tube 232. Since the fastening pipe 231 and the pre-tightening pipe 232 are sleeved on the outer periphery of the gas tank 210 and the connecting pipe 220, the inner periphery of the fastening pipe 231 and the pre-tightening pipe 232 matches the outer periphery of the gas tank 210 and the connecting pipe 220. At least a portion of the pipe section of the fastening pipe 231 and the pre-tightening pipe 232 overlaps with the gas tank 210 and the connecting pipe 220, thereby increasing the connection area between the fastening pipe 231 and the pre-tightening pipe 232 and the gas tank 210 and the connecting pipe 220, and constraining the gas tank 210 and the connecting pipe 220 in the circumferential direction.

[0035] Through the above-described embodiments, by integrating at least one of the crossbeams 200, the gas tank 210 and the crossbeam 200 of the subframe are spatially integrated, which helps to improve space utilization. The fastening tube 231 and the pre-tightening tube 232 are respectively located between a connecting tube 220 and the gas tank 210, and are respectively sleeved on the outer periphery of the corresponding connecting tube 220 and the outer periphery of the corresponding end of the gas tank 210. This allows the gas tank 210 to be stably fixed between the two connecting tubes 220 by the fastening tube 231 and the pre-tightening tube 232, which can improve the structural strength and rigidity of the subframe assembly 10 and reduce the risk of damage to the subframe assembly 10 under external forces.

[0036] In some embodiments, the portion of the gas canister 210 overlapping with the fastening tube 231 and the pre-tightening tube 232 in the first direction X has a first length, and the portion of the gas canister 210 in the first direction X has a second length, with the ratio of the first length to the second length being between one-tenth and three-twentieths. The ends of the fastening tube 231 and the pre-tightening tube 232, close to each other, are fitted onto the outer periphery of both ends of the gas canister 210, such that the fastening tube 231 and the pre-tightening tube 232 overlap with the gas canister 210. The length of the portion of the gas canister 210 overlapping with the fastening tube 231 is between one-tenth and three-twentieths of the total length of the gas canister 210, and the length of the portion of the gas canister 210 overlapping with the pre-tightening tube 232 is between one-tenth and three-twentieths of the total length of the gas canister 210. If the overlap length between the gas tank 210 and the fastening tube 231 and pre-tightening tube 232 is too short, the connection strength and stability between the gas tank 210 and the fastening tube 231 and pre-tightening tube 232 will be low, resulting in high stress concentration at the connection point and making the gas tank 210 and other components prone to damage. If the overlap length is too long, although it can improve the connection strength and stability at the connection point, the disassembly and assembly efficiency will be low, and the weight of the subframe assembly 10 will be increased, which is not conducive to the realization of lightweight design.

[0037] Therefore, by controlling the ratio of the first length to the second length to between one-tenth and three-twentieth, the structural strength of the connection between the gas tank 210 and the fastening tube 231 and the pre-tightening tube 232 and the weight of the subframe assembly 10 can be balanced.

[0038] See Figure 3 , Figure 3 yes Figure 2 A disassembly diagram of one embodiment of the pre-tightening tube is shown.

[0039] In some embodiments, the pre-tightening tube 232 includes a base 2321 and a telescopic tube 2324. One end of the base 2321 is sleeved on the outer periphery of the corresponding connecting tube 220. The gas tank 210 is spaced apart from the base 2321 in the first direction X. The telescopic tube 2324 is connected to one end of the base 2321 near the gas tank 210, and the inner wall of the telescopic tube 2324 is screwed to the outer periphery of the base 2321 and the gas tank 210.

[0040] The base 2321 serves as the fixed base for the pre-tightening tube 232 and is used to connect with the connecting tube 220. The telescopic tube 2324 is a tubular component that can move relative to the base 2321 along the first direction X, and its inner wall has a threaded structure. One end of the base 2321 in the first direction X is fitted onto the outer periphery of the corresponding connecting tube 220. The fitting connection can be welding, integral molding, or interference fit, so that the base 2321 remains fixed in position relative to the connecting tube 220. The gas tank 210 is spaced apart from the base 2321 in the first direction X, which means that the base 2321 does not directly abut against the end face of the gas tank 210, but leaves a distance, which is determined by the position of the telescopic tube 2324. The telescopic tube 2324 is connected to the end of the base 2321 near the gas tank 210. Specifically, the inner wall of the telescopic tube 2324 is provided with internal threads, and the outer periphery of the parts of the base 2321 and the gas tank 210 that mate with the telescopic tube 2324 are provided with external threads. The telescopic tube 2324 is screwed with the external threads of the gas tank 210 and the base 2321 through its own internal threads, so as to realize the detachable connection between the telescopic tube 2324 and the gas tank 210.

[0041] It should be noted that none of the threaded structures mentioned in this application are shown in the figures.

[0042] During the disassembly or installation of the gas tank 210, the connecting pipe 220 is fixed on the longitudinal beam 100, and the base 2321 and the fastening pipe 231 are also connected to the corresponding connecting pipe 220. When disassembling or installing the gas tank 210, the gas tank 210 and the connecting pipe 220 can be installed or disassembled simply by rotating the telescopic pipe 2324.

[0043] For example, during the assembly and disassembly of the gas tank 210, the telescopic tube 2324 can be pre-screwed to the outer periphery of the gas tank 210 or the outer periphery of the base 2321. After the gas tank 210 is connected to the fastening tube 231, it is only necessary to rotate the telescopic tube 2324 to move the telescopic tube 2324 in the first direction X, so that the telescopic tube 2324 can be connected to both the base 2321 and the gas tank 210 at the same time.

[0044] Therefore, by setting up the combined structure of the base 2321 and the telescopic tube 2324, the pre-tensioning tube 232 has a length adjustment function, thereby achieving precise control of the pre-tensioning force. This helps ensure the positional stability and uniform stress distribution of the gas tank 210 within the integrated structure of the crossbeam 200. By fitting the base 2321 onto the outer periphery of the connecting tube 220, the base 2321 can be securely fixed at a specific position on the subframe crossbeam 200, providing a reliable support reference for the telescopic tube 2324 and further improving the structural integrity of the subframe assembly 10. Through the screw connection between the inner wall of the telescopic tube 2324 and the base 2321 and the outer periphery of the gas tank 210, the pre-tensioning tube 232 can achieve telescopic movement through a simple rotation operation. This simplifies the assembly process, reduces reliance on specialized assembly tools, and improves the efficiency of disassembling and assembling the gas tank 210.

[0045] In some embodiments, such as Figure 3 As shown, the base 2321 includes a first segment 2322 and a second segment 2323. The first segment 2322 is sleeved on a corresponding connecting pipe 220. The second segment 2323 is connected to the end of the first segment 2322 near the gas tank 210. The second segment 2323 is spaced apart from the gas tank 210. The telescopic pipe 2324 is screwed to the outer periphery of the second segment 2323 in the first state and spaced apart from the gas tank 210. In the second state, the telescopic pipe 2324 is screwed to the outer periphery of the second segment 2323 and the gas tank 210.

[0046] The base 2321 is the main fixing part of the pre-tightening tube 232, and it includes a first section 2322 and a second section 2323. The first section 2322 is used to connect with the connecting tube 220. The second section 2323 is connected to the end of the first section 2322 near the gas tank 210. The second section 2323 serves as a support and guide base for the telescopic tube 2324, and the end of the second section 2323 away from the first section 2322 is spaced apart from the gas tank 210 to reserve an installation position for the connection between the gas tank 210 and the fastening tube 231 and the telescopic tube 2324. The first state refers to the state where the telescopic tube 2324 is not yet connected to both the gas tank 210 and the base 2321. The second state refers to the state where the telescopic tube 2324 is simultaneously connected to both the gas tank 210 and the base 2321. The outer periphery of the second segment 2323 is provided with external threads. In the first state, the internal thread of the telescopic tube 2324 is connected to the outer periphery thread of the second segment 2323, so that the telescopic tube 2324 is pre-connected to the second segment 2323. After the end of the gas tank 210 away from the second segment 2323 is connected to the fastening tube 231, the telescopic tube 2324 is rotated to move the telescopic tube 2324 towards the gas tank 210 until the telescopic tube 2324 is simultaneously screwed to the outer periphery of the gas tank 210 and the second segment 2323, so that the telescopic tube 2324 changes from the first state to the second state, realizing the connection between the telescopic tube 2324, the gas tank 210, and the base 2321.

[0047] Therefore, by setting a base 2321 including a first section 2322 and a second section 2323, with the first section 2322 connected to the connecting pipe 220 and the telescopic pipe 2324 pre-screwed to the second section 2323, the gas tank 210 can be disassembled and assembled simply by rotating the telescopic pipe 2324 toward the gas tank 210 without disassembling or assembling any other parts, thus simplifying the disassembly and assembly process and improving efficiency.

[0048] In some embodiments, the inner wall of the fastening tube 231 is screwed to the outer periphery of the gas tank 210.

[0049] The fastening tube 231 is used to connect the corresponding connecting tube 220 and the end of the air tank 210 away from the pre-tightening tube 232. The fastening tube 231 is provided with internal threads, and the outer circumference of the end of the air tank 210 near the fastening tube 231 may be provided with external threads. The fastening tube 231 is screwed to the external threads of the air tank 210 through the internal threads, so that a firm mechanical connection is formed between the air tank 210 and the fastening tube 231, which can effectively transmit the axial load and bending moment borne by the air tank 210 and reduce the risk of relative slippage or separation of the connection.

[0050] Therefore, the connection strength and stability between the gas tank 210 and the fastening pipe 231 are better, and the disassembly and assembly of the gas tank 210 can be carried out without damaging other parts, which helps to simplify the assembly process and improve the disassembly and assembly efficiency.

[0051] See Figure 4 and Figure 5 And continue to refer to Figure 1 , Figure 4 yes Figure 1 A magnified structural diagram of the area at point n (dashed box). Figure 5 yes Figure 2 A schematic diagram of one embodiment of the fastening tube and gas cylinder is shown.

[0052] In some embodiments, a first flange 2311 is provided on the outer periphery of the fastening tube 231, and a second flange 211 is screwed onto the outer periphery of the gas tank 210 near one end of the fastening tube 231, with the first flange 2311 and the second flange 211 abutting against each other.

[0053] The first flange 2311 refers to an annular protrusion or disc-shaped structure disposed on the fastening tube 231 and perpendicular to the first direction X. The first flange 2311 can be fixedly connected to the outer periphery of the fastening tube 231, or the first flange 2311 can also be screwed to the outer periphery of the fastening tube 231. The outer periphery of the gas tank 210 near the end of the fastening tube 231 refers to the cylindrical outer wall of the gas tank 210 that is connected to the fastening tube 231. The second flange 211 refers to an annular protrusion or disc-shaped structure disposed on the outer periphery of the gas tank 210 and perpendicular to the first direction X. The second flange 211 can be spaced apart from the end of the gas tank 210 near the fastening tube 231 in the first direction X. The second flange 211 is fixed to the gas tank 210 by a threaded connection. During the installation of the gas cylinder 210 into the fastening tube 231, the gas cylinder 210 is screwed into the fastening tube 231. As the screwing depth increases, the second flange 211 gradually approaches the first flange 2311 of the fastening tube 231 until their approaching end faces are completely fitted. At this point, the internal thread of the fastening tube 231 engages with the external thread of the gas cylinder 210. Simultaneously, the first flange 2311 and the second flange 211 abut against each other, forming a rigid connection interface. The load between the gas cylinder 210 and the fastening tube 231 can be supported by the two flanges. Furthermore, after the first flange 2311 and the second flange 211 abut against each other, the second flange 211 can be rotated further, increasing the interaction force between the first flange 2311 and the second flange 211. This, combined with the screw connection between the fastening tube 231 and the gas cylinder 210, restricts the movement of the gas cylinder 210 in the first direction X, resulting in a more stable fixation.

[0054] Therefore, after the gas cylinder 210 is installed on the fastening pipe 231, the first flange 2311 and the second flange 211 abut against each other. The two flanges can support the load in the first direction X and play a role in positioning and limiting the gas cylinder 210, which can improve the connection strength and stability between the fastening pipe 231 and the gas cylinder 210. In addition, the position of the gas cylinder 210 relative to the fastening pipe 231 can be adjusted by adjusting the screw-in depth of the second flange 211, which is beneficial to improving assembly accuracy and connection reliability.

[0055] In some embodiments, the end of the fastening tube 231 away from the gas tank 210 is fixedly connected to a corresponding connecting tube 220 by welding.

[0056] In addition to being fitted onto the outer periphery of the connecting pipe 220, the fastening pipe 231 is also rigidly connected to the connecting pipe 220 by welding, thus fixing the fastening pipe 231 and the connecting pipe 220 into a single structure. This structure allows the gas tank 210 to form a stable connection system with the connecting pipe 220 through the fastening pipe 231. The load can be directly transferred through the fastening pipe 231 to the connecting pipe 220, and then to the longitudinal beam 100 and another cross beam 200, reducing the risk of loosening or insufficient strength at the connection between the connecting pipe 220 and the fastening pipe 231.

[0057] Therefore, by welding the end of the fastening tube 231 away from the gas tank 210 to the corresponding connecting tube 220, the fastening tube 231 and the connecting tube 220 form a rigid whole, eliminating the possibility of relative movement between them. This improves the connection stiffness and overall stability of the fastening tube 231 and the connecting tube 220, which is beneficial to enhancing the subframe assembly 10's ability to withstand complex loads. Furthermore, the fixed connection design of the fastening tube 231 and the connecting tube 220 reduces the number of parts and assembly steps, facilitating the subsequent disassembly and assembly of the gas tank 210 and improving disassembly and assembly efficiency.

[0058] In some embodiments, the end of the pretensioning tube 232 away from the gas tank 210 is fixedly connected to a corresponding connecting tube 220 by welding.

[0059] Similar to the connection method of the fastening tube 231 and the connecting tube 220, the end of the pre-tightening tube 232 away from the gas tank 210 is also rigidly connected to the other connecting tube 220 by welding, thereby fixing the pre-tightening tube 232 and the connecting tube 220 into a whole structure. This improves the connection rigidity and overall stability of the pre-tightening tube 232 and the connecting tube 220, which is beneficial to increasing the ability of the subframe assembly 10 to withstand complex loads, and also helps to improve the efficiency of disassembly and assembly.

[0060] See Figure 6 And continue to refer to Figure 1 , Figure 6 yes Figure 4 Sectional view along the AA direction.

[0061] In some embodiments, at least one connecting pipe 220 is provided with a first reinforcing section 221 extending along a first direction X. The first reinforcing section 221 is located at one end near the gas tank 210. The first reinforcing section 221 includes an arcuate portion 2211 and a protrusion 2212 disposed in a circumferential direction around the first direction X. The two ends of the protrusion 2212 are connected to the two ends of the arcuate portion 2211 in the circumferential direction, and the protrusion 2212 protrudes outward relative to the arcuate portion 2211.

[0062] An integrated crossbeam 200 includes two connecting pipes 220, one or both of which have a first reinforcing section 221. The first reinforcing section 221 is located at the end of the connecting pipe 220 near the gas tank 210 and extends in a first direction X. The first reinforcing section 221 is used to be fitted with a fastening pipe 231 or a pre-tightening pipe 232. Since the end of the connecting pipe 220 near the gas tank 210 is used to connect with other components, this area bears a large local load and stress concentration. The first reinforcing section 221 can improve the structural strength of this area. Specifically, the first reinforcing section 221 includes an arc-shaped portion 2211 and a protrusion 2212. The arc-shaped portion 2211 is the main structure of the first reinforcing section 221 and extends in the circumferential direction. The arc shape of the arc-shaped portion 2211 can reduce stress concentration. The two ends of the protrusion 2212 in the circumferential direction are connected to the two ends of the arc-shaped portion 2211 in the circumferential direction, and the protrusion 2212 protrudes radially outward from the arc-shaped portion 2211, forming a structure similar to a reinforcing rib. This causes the first reinforcing segment 221 to form a structural abrupt change at the protrusion 2212, and increases the cross-sectional size of the first reinforcing segment 221 in the circumferential direction.

[0063] Therefore, by providing an arcuate portion 2211 and a protrusion 2212 extending along the first direction X in the first reinforcing section 221, the local cross-sectional moment of inertia of the first reinforcing section 221 is increased, thereby improving the ability of the area to resist bending and torsional deformation. This helps to reduce the risk of structural fatigue or damage caused by stress concentration at the connection between the first reinforcing section 221 and other components.

[0064] Furthermore, the connection between the protrusion 2212 and the arcuate portion 2211 can be arcuately transitioned, thereby reducing stress concentration between the protrusion 2212 and the arcuate portion 2211.

[0065] In some embodiments, a second reinforcing section 2312 is provided for the fastening tube 231 and / or pre-tightening tube 232 corresponding to the first reinforcing section 221. The second reinforcing section 2312 is sleeved on the outer periphery of the first reinforcing section 221, and the inner side of the second reinforcing section 2312 matches the outer side of the first reinforcing section 221.

[0066] As an example, if the connecting pipe 220 corresponding to the fastening pipe 231 has a first reinforcing section 221, then the fastening pipe 231 has a second reinforcing section 2312. As another example, if the connecting pipe 220 corresponding to the pre-tightening pipe 232 has a first reinforcing section 221, then the pre-tightening pipe 232 has a second reinforcing section 2312. As yet another example, if both connecting pipes 220 have a first reinforcing section 221, then both the pre-tightening pipe 232 and the fastening pipe 231 have a second reinforcing section 2312. The structure of the second reinforcing segment 2312 is similar to that of the first reinforcing segment 221. That is, the second reinforcing segment 2312 has a curved surface and other structures that are adapted to the arc-shaped portion 2211 and the protrusion 2212. The difference is that the radial dimension of the second reinforcing segment 2312 is slightly larger than that of the first reinforcing segment 221, so that the second reinforcing segment 2312 can be fitted onto the outer periphery of the first reinforcing segment 221, so that the inner surface of the second reinforcing segment 2312 matches the outer surface of the first reinforcing segment 221, and the first reinforcing segment 221 and the second reinforcing segment 2312 can fit tightly together.

[0067] Therefore, by providing a second reinforcing section 2312 corresponding to the fastening tube 231 and / or pre-tightening tube 232 of the first reinforcing section 221, and by fitting the second reinforcing section 2312 onto the outer periphery of the first reinforcing section 221, the local stiffness and strength of the connection area between the two are significantly improved, which helps to reduce the risk of deformation at the connection due to uneven load transfer. The design of matching the inner surface of the second reinforcing section 2312 with the outer surface of the first reinforcing section 221 allows for a tight fit, forming a continuous reinforcing structure. This facilitates a more even load transfer between the fastening tube 231, the pre-tightening tube 232, and the overlapping tube 220, reducing stress concentration and thus improving the structural reliability and durability of the subframe assembly 10 under complex working conditions.

[0068] In some embodiments, the side of the protrusion 2212 that is radially away from the arcuate portion 2211 can be an arcuate surface, a plane, or an undulating curved surface. When it is a plane or an undulating curved surface, the rigidity and strength of the area can be further improved, and other components can be avoided. The specific shape can be set to avoid other components according to the outer contour of the adjacent components.

[0069] In some embodiments, the gas tank 210 includes a tank body and a valve body. The valve body has an air inlet and an air outlet, both of which are connected to the internal cavity of the tank body. The internal cavity is used to store compressed gas. The air inlet can be connected to a compressor so that the compressor provides compressed gas to the tank body. The air outlet is connected to an air spring so that compressed air is stably delivered to the air spring through the tank body.

[0070] In summary, by integrating at least one of the crossbeams 200, the gas tank 210 and the crossbeam 200 of the subframe are spatially integrated, which helps to improve space utilization. The fastening tube 231 and the pre-tightening tube 232 are respectively located between a connecting tube 220 and the gas tank 210, and are respectively fitted onto the outer periphery of the corresponding connecting tube 220 and the outer periphery of the corresponding end of the gas tank 210. This allows the gas tank 210 to be stably fixed between the two connecting tubes 220 by the fastening tube 231 and the pre-tightening tube 232, which can improve the structural strength and rigidity of the subframe assembly 10 and reduce the risk of damage to the subframe assembly 10 under external forces.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A subframe assembly comprising: The subframe assembly includes: Two longitudinal beams are positioned opposite each other and spaced apart in the first direction; Two crossbeams are arranged opposite each other and spaced apart in a second direction that intersects with the first direction, and two longitudinal beams are connected between the two crossbeams; At least one of the crossbeams includes an integrated gas tank, a connecting assembly, and two connecting pipes. The outer periphery of the two connecting pipes is connected to the same end of the two longitudinal beams and is spaced apart and opposite to each other in the first direction. The gas tank is located between the two connecting pipes and spaced apart from them. The connecting assembly includes a fastening pipe and a pre-tightening pipe. The fastening pipe and the pre-tightening pipe are respectively sleeved on the outer periphery of a corresponding connecting pipe and the outer periphery of a corresponding end of the gas tank.

2. The subframe assembly according to claim 1, characterized in that, The pre-tightening tube includes a base and a telescopic tube. One end of the base is sleeved on the outer periphery of the corresponding connecting tube. The gas cylinder is spaced apart from the base in the first direction. The telescopic tube is connected to the end of the base near the gas cylinder, and the inner wall of the telescopic tube is screwed to the outer periphery of the base and the gas cylinder.

3. The subframe assembly according to claim 2, characterized in that, The base includes a first section and a second section. The first section is sleeved on a corresponding connecting pipe. The second section is connected to the end of the first section near the gas tank. The second section is spaced apart from the gas tank. In a first state, the telescopic pipe is screwed to the outer periphery of the second section and spaced apart from the gas tank. In a second state, the telescopic pipe is screwed to the outer periphery of both the second section and the gas tank.

4. The subframe assembly according to claim 1, characterized in that, The inner wall of the fastening tube is screwed to the outer periphery of the gas tank.

5. The subframe assembly according to claim 4, characterized in that, The fastening tube is provided with a first flange on its outer periphery, and the gas tank is screwed to a second flange on its outer periphery near one end of the fastening tube, with the first flange and the second flange abutting against each other.

6. The subframe assembly according to claim 1, characterized in that, The end of the fastening tube away from the gas tank is fixedly connected to a corresponding connecting tube by welding.

7. The subframe assembly according to claim 6, characterized in that, The end of the pre-tightening tube away from the gas tank is fixedly connected to a corresponding connecting tube by welding.

8. The subframe assembly according to claim 1, characterized in that, At least one of the connecting pipes is provided with a first reinforcing section extending along the first direction. The first reinforcing section is located at one end near the gas tank. The first reinforcing section includes an arcuate portion and a protruding portion arranged in a circumferential direction around the first direction. The two ends of the protruding portion are connected to the two ends of the arcuate portion in the circumferential direction, and the protruding portion protrudes outward relative to the arcuate portion.

9. The subframe assembly according to claim 8, characterized in that, The fastening tube and / or the pre-tightening tube corresponding to the first reinforcing section are provided with a second reinforcing section, the second reinforcing section is sleeved on the outer periphery of the first reinforcing section, and the inner side of the second reinforcing section matches the outer side of the first reinforcing section.

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

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