Auxiliary frame assembly and air suspension assembly

Abstract

The utility model relates to the technical field of air suspension assemblies, and particularly discloses an auxiliary frame assembly and an air suspension assembly, the auxiliary frame assembly comprises an auxiliary frame, an air compressor and an air spring, the air compressor is used for generating compressed air and supplying the compressed air to the air spring, and the auxiliary frame comprises at least two longitudinal beams and at least two cross beams. Each cross beam is sequentially connected with each cross beam, a mounting part is arranged in one cross beam or one longitudinal beam, the air compressor is arranged on the mounting part, and the air compressor can be accommodated in the mounting part arranged in one longitudinal beam or cross beam of the auxiliary frame. The air compressor can reduce noise generated when the air compressor works, noise vibration and harshness (NVH) performance of a vehicle is guaranteed, the air compressor does not need to occupy external space, compared with the prior art, a cover body or an acoustic bag does not need to be arranged independently, the number of parts can be reduced, weight is reduced, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a subframe assembly and an air suspension assembly. Background Art

[0002] In order to improve the comfort of the vehicle, air springs are usually installed on the vehicle's subframe, which connect the vehicle body and the lower arm to reduce vibration. In addition, the vehicle needs to be equipped with an air compressor to provide compressed air to the air spring. The air compressor is usually set independently from the subframe, and the air compressor will generate large noise and vibration during operation, which can be easily transmitted to the vehicle. The driver and passengers can clearly feel it in the car, which will affect the NVH (Noise, Vibration, Harshness) performance of the vehicle.

[0003] Regarding the above-mentioned noise generated by the air compressor, in the prior art, a cover or an acoustic bag is usually installed on the outside of the air compressor to accommodate the air compressor. This can reduce the noise generated by the air compressor when working and transmitted to the outside of the cover or the acoustic bag. However, in this way, the external space occupied by the air compressor will be further increased, the overall weight will also increase, and the cost will be higher. Utility Model Content

[0004] The utility model aims to provide a subframe assembly and an air suspension assembly, which can reduce the space occupied by the air compressor and the weight of the air suspension assembly, thereby saving costs, while ensuring the noise reduction effect.

[0005] On the one hand, the utility model provides a subframe assembly, which includes a subframe, an air compressor and an air spring, wherein the air compressor is used to generate compressed air, and the compressed air generated by the air compressor can be supplied to the air spring, the subframe includes at least two longitudinal beams and at least two cross beams, each of the cross beams is connected to each of the cross beams in sequence, and an installation portion is provided inside one of the cross beams or one of the longitudinal beams, and the air compressor is provided on the installation portion.

[0006] As a preferred technical solution for the subframe assembly, at least two cross beams include a front cross beam, the front cross beam includes a first shell and a second shell that are detachably connected, the mounting portion is a accommodating space enclosed by the first shell and the second shell, the air compressor is located in the accommodating space, and the air compressor is connected to the first shell and / or the second shell.

[0007] As a preferred technical solution of the sub-frame assembly, the cross-section of the first shell and the cross-section of the second shell are both U-shaped.

[0008] As a preferred technical solution of the sub-frame assembly, the sub-frame assembly also includes a first elastic member, which is located in the accommodating space, and one end of the first elastic member is connected to the air compressor, and the other end of the first elastic member is supported by the first shell or the second shell.

[0009] As a preferred technical solution of the sub-frame assembly, the sub-frame assembly also includes a fastener and a second elastic member, the fastener passes through the first shell or the second shell and is connected to the first elastic member, the second elastic member is located outside the accommodating space, the second elastic member is sleeved on the fastener, and the second elastic member is elastically pressed against the fastener and one of the first shell and the second shell.

[0010] As a preferred technical solution of the sub-frame assembly, the sub-frame assembly further includes a plurality of third elastic members arranged on the sub-frame, and the third elastic members are used to connect the sub-frame and the vehicle body.

[0011] As a preferred technical solution of the subframe assembly, the subframe assembly includes a plurality of the air springs, and the subframe assembly also includes a distribution valve, the distribution valve includes an input port and a plurality of first output ports, the air compressor is connected to the input port, and the plurality of first output ports are connected to the plurality of air springs in a one-to-one correspondence.

[0012] As a preferred technical solution of the sub-frame assembly, the sub-frame assembly further includes an air storage tank, and the distribution valve further includes a second output port, and the second output port is connected to the air storage tank.

[0013] As a preferred technical solution of the sub-frame assembly, the sub-frame assembly further includes a plurality of brackets, the brackets are fixed to the gas tank, and the brackets are used to connect to the vehicle body.

[0014] The auxiliary frame assembly provided by the utility model has at least the following beneficial effects:

[0015] The subframe assembly includes a subframe, an air compressor and an air spring. The air compressor is used to generate compressed air and supply the air spring. The subframe includes at least two longitudinal beams and at least two cross beams. Each cross beam is connected to each cross beam in sequence. A mounting portion is provided inside one of the cross beams or one of the longitudinal beams. The air compressor is provided at the mounting portion. The subframe assembly can accommodate the air compressor through the mounting portion provided in one of the longitudinal beams or cross beams of the subframe, thereby reducing the noise generated by the air compressor when it is working, ensuring the NVH performance of the vehicle, and the air compressor does not need to occupy external space. Compared with the prior art, there is no need to separately provide a cover or an acoustic package, which can reduce the number of parts, reduce weight, and reduce production costs.

[0016] On the other hand, the utility model provides an air suspension assembly, including the subframe assembly of any of the above schemes, the air suspension assembly also includes a body and a lower arm, the subframe is connected to the body, and the air spring is connected between the body and the lower arm.

[0017] The air suspension assembly provided by the utility model has at least the following beneficial effects:

[0018] The air suspension assembly adopts the above-mentioned subframe assembly, and the air compressor is accommodated in the mounting portion of one of the crossbeams or longitudinal beams of the subframe. The air compressor does not need to occupy external space, and the structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural schematic diagram of the subframe assembly in the embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the auxiliary frame assembly in the embodiment of the utility model;

[0021] Figure 3 An exploded view of the front cross beam and the air compressor of the subframe assembly in the embodiment of the utility model;

[0022] Figure 4 It is a schematic structural diagram of the gas tank and bracket of the subframe assembly in the embodiment of the utility model.

[0023] In the figure:

[0024] 1. Subframe; 11. Left longitudinal beam; 12. Right longitudinal beam; 13. Front cross beam; 131. First housing; 132. Second housing; 133. Bolt; 14. Rear cross beam;

[0025] 2. Air compressor; 3. Air spring; 4. First elastic member; 5. Third elastic member; 6. Air storage tank; 7. Distribution valve; 8. Second air supply branch pipeline; 9. First air supply branch pipeline; 10. Air compressor pipeline; 21. Fastener; 22. Second elastic member; 23. Bracket. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The air compressor in the prior art is usually arranged independently from the subframe. During operation, the air compressor will generate relatively large noise, which is easily transmitted to the inside of the vehicle and can be clearly felt by the driver and passengers in the vehicle. In order to reduce the noise, a cover or an acoustic bag is usually installed on the outside of the air compressor to accommodate the air compressor. This can reduce the noise generated by the air compressor when it is working and transmitted to the outside of the cover or the acoustic bag. However, in this way, the external space occupied by the air compressor will be further increased, the overall weight will also increase, and the cost will be higher.

[0031] In this regard, this embodiment provides a subframe assembly to solve the above problem. The subframe assembly can be applied to an air suspension assembly, and then to a vehicle. The vehicle can be a fuel vehicle or a new energy vehicle.

[0032] For details, please refer to Figures 1 to 3 The subframe assembly includes a subframe 1, an air compressor 2 and an air spring 3, wherein the air compressor 2 is used to generate compressed air and supply the air spring 3, the air spring 3 is used to connect the vehicle body and the lower arm, and plays the role of supporting the vehicle body and reducing vibration, the subframe 1 includes at least two longitudinal beams and at least two cross beams, each cross beam is connected to each cross beam in turn, and a mounting portion is provided inside one of the cross beams or one of the longitudinal beams, and the air compressor 2 is provided in the mounting portion. In this way, the mounting portion can accommodate the air compressor 2, which can reduce the noise generated by the air compressor 2 when it is working, and ensure the NVH performance of the vehicle, and the mounting portion is provided in one of the longitudinal beams or cross beams of the subframe 1, the air compressor 2 does not need to occupy the external space, and compared with the prior art, there is no need to set up a cover or an acoustic package separately, which can reduce the number of parts, reduce weight, and reduce production costs.

[0033] Among them, the specific number of longitudinal beams and cross beams in the subframe 1 can be set according to actual needs. Exemplarily, the present embodiment provides a scheme in which the subframe 1 includes two cross beams and two longitudinal beams. Specifically, the two cross beams are arranged at intervals along the front-to-back direction of the vehicle, and the two cross beams specifically include a front cross beam 13 and a rear cross beam 14. The two longitudinal beams are arranged at intervals along the left-to-right direction of the vehicle, and the two longitudinal beams specifically include a left longitudinal beam 11 and a right longitudinal beam 12. The left and right ends of the front cross beam 13 are respectively connected between the front end of the left longitudinal beam 11 and the front end of the right longitudinal beam 12, and the left and right ends of the rear cross beam 14 are respectively connected between the rear end of the left longitudinal beam 11 and the rear end of the right longitudinal beam 12.

[0034] In addition, the crossbeam or longitudinal beam where the mounting portion is provided can also be selected as required. In this embodiment, a solution is provided in which the mounting portion is provided on one of the crossbeams. Specifically, in this embodiment, a solution is provided in which the mounting portion is provided on the front crossbeam 13.

[0035] Optionally, see Figure 3 The front cross beam 13 includes a first shell 131 and a second shell 132, which are detachably connected. The mounting portion is a storage space surrounded by the first shell 131 and the second shell 132. The air compressor 2 is located in the storage space and is connected to the first shell 131 and / or the second shell 132. In this way, the front cross beam 13 is configured as a detachable structure, which is convenient for the installation and maintenance of the air compressor 2. In addition, the front cross beam 13 adopts a shell structure, which can reduce the weight of the front cross beam 13 and is conducive to the lightweight of the vehicle.

[0036] In this embodiment, the first shell 131 and the second shell 132 are relatively arranged along the front-to-back direction. In other embodiments, the first shell 131 and the second shell 132 may also be relatively arranged along the up-down direction.

[0037] In addition, in this embodiment, the air compressor 2 is specifically disposed in the second housing 132. In other embodiments, the air compressor 2 may also be disposed in the first housing 131, or the air compressor 2 may be disposed in both the first housing 131 and the second housing 132.

[0038] In addition, in the present embodiment, the first shell 131 and the second shell 132 are detachably connected by bolts 133 . In other embodiments, the first shell 131 and the second shell 132 may also be detachably connected by buckles, clamps, etc.

[0039] Optionally, see Figure 3 In this embodiment, the cross-section of the first shell 131 and the cross-section of the second shell 132 are both U-shaped, so that the first shell 131 and the second shell 132 can have high strength and are easy to be formed through an extrusion process to reduce production costs. It should be noted that in this embodiment, the cross-section of the first shell 131 and the cross-section of the second shell 132 are both perpendicular to the left and right directions of the vehicle. In other embodiments, as needed, one of the first shell 131 and the second shell 132 can be set to have a straight cross-section, and the other can be set to have a U-shaped cross-section; or the cross-section of the first shell 131 and the cross-section of the second shell 132 can both be L-shaped.

[0040] Optionally, the first shell 131 and the second shell 132 are both formed by an extrusion process. The extrusion process is suitable for processing thin shell parts with regular cross-sections. The processing process is simple and can effectively reduce the processing cost of the first shell 131 and the second shell 132.

[0041] Optionally, the cavity wall of the accommodating space is provided with sound insulation material, so that the noise generated by the operation of the air compressor can be further reduced through the sound insulation material, such as sound insulation felt; or, the cavity wall of the accommodating space is provided with sound absorption material, so that the noise generated by the operation of the air compressor can be further absorbed through the sound absorption material and the noise generated by the operation of the air compressor can be reduced, such as sound absorption cotton.

[0042] Optionally, please continue to refer to Figure 3 The subframe assembly further includes a first elastic member 4, which is located in the accommodation space, and one end of the first elastic member 4 is connected to the air compressor 2, and the other end of the first elastic member 4 is supported on the second housing 132. Specifically, in this embodiment, the first elastic member 4 is supported on the inner wall of the second housing 132. By providing the first elastic member 4, the vibration generated during the operation of the air compressor 2 can be buffered, thereby improving the comfort of the occupants in the vehicle and improving the NVH performance of the vehicle.

[0043] It should be noted that when the air compressor 2 is connected to the first housing 131 , the other end of the first elastic member 4 is supported on the first housing 131 .

[0044] In this embodiment, the first elastic member 4 is specifically an elastic bushing. In other embodiments, the first elastic member 4 can also be configured as required, such as using an elastic suspension rod.

[0045] In addition, this embodiment does not limit the number of the first elastic members 4 disposed between the air compressor 2 and the second housing 132 , and the number can be selected according to specific needs.

[0046] Optionally, the subframe assembly further includes a fastener 21 and a second elastic member 22, the fastener 21 passes through the second housing 132 and is connected to the first elastic member 4, the second elastic member 22 is located outside the accommodation space, the second elastic member 22 is sleeved on the fastener 21, and the second elastic member 22 elastically presses against the fastener 21 and the second housing 132. By providing the second elastic member 22, the vibration generated during the operation of the air compressor 2 can be further buffered, and the transmission of the vibration to the subframe 1 can be avoided or weakened, so that the comfort of the occupants in the vehicle and the NVH performance of the vehicle can be further improved.

[0047] It should be noted that when the air compressor 2 is connected to the first housing 131 , the fastener 21 passes through the first housing 131 and is connected to the first elastic member 4 , and the second elastic member 22 elastically presses against the fastener 21 and the first housing 131 .

[0048] In other embodiments, the first elastic member 4 may also be directly connected to the second shell 132 .

[0049] In this embodiment, the number of the first elastic member 4, the fastener 21, and the second elastic member 22 is set in a one-to-one correspondence, the fastener 21 is specifically a bolt, and the second elastic member 22 is specifically a compression spring. In other embodiments, the fastener 21 can also be selected as a rivet, etc., and the second elastic member 22 can also be selected as a rubber pad, etc. as needed.

[0050] Optionally, see Figure 1 and Figure 2, the subframe assembly also includes a plurality of third elastic members 5 arranged on the subframe 1, and the third elastic members 5 are used to connect the subframe 1 and the vehicle body. Specifically, in this embodiment, a plurality of third elastic members 5 are distributed on the left longitudinal beam 11 and the right longitudinal beam 12. By setting the third elastic member 5, the vibration transmitted from the subframe 1 to the vehicle body can be reduced, and the third elastic member 5 cooperates with the first elastic member 4 to enable the vibration generated when the air compressor 2 is working to be transmitted to the vehicle body through two-stage vibration reduction, which can further improve the NVH performance of the vehicle and improve the comfort of the occupants in the vehicle. Exemplarily, in this embodiment, the specific number of the third elastic members 5 is four, and the four third elastic members 5 are sequentially arranged at the front end of the left longitudinal beam 11, the rear end of the left longitudinal beam 11, the front end of the right longitudinal beam 12, and the rear end of the right longitudinal beam 12. In other embodiments, the number of the third elastic members 5 arranged on the left longitudinal beam 11 and the right longitudinal beam 12 can also be set as needed.

[0051] Preferably, the third elastic member 5 is specifically an elastic bushing, which can be a rubber bushing or a hydraulic bushing. Since the existing subframe usually uses an elastic bushing as a vibration damping member to connect with the vehicle body, the third elastic member 5 is set as an elastic bushing in this embodiment, without changing the existing design, which is conducive to reducing costs. In other embodiments, the third elastic member 5 can be selected as other elastic elements as needed.

[0052] Optionally, the sub-frame assembly includes a plurality of air springs 3, and the sub-frame assembly also includes a distribution valve 7, the distribution valve 7 includes an input port and a plurality of first output ports, the air compressor 2 is connected to the input port, and the plurality of first output ports are connected to the plurality of air springs 3 in a one-to-one correspondence. The compressed air output by the air compressor 2 can be accurately diverted to the plurality of first output ports through the distribution valve 7, and then accurately diverted to the plurality of air springs 3, so as to ensure the control accuracy of the air springs 3. Among them, the distribution valve 7 is a prior art, and its specific structure is not repeated here. Specifically, in this embodiment, an exemplary scheme is given in which the sub-frame assembly includes two air springs 3, and the two air springs 3 are respectively arranged on the left and right sides of the sub-frame 1, and the distribution valve 7 has two first output ports, and the two first output ports are respectively connected to the two first air supply branch pipes 9, and the two first air supply branch pipes 9 are respectively connected to the two air springs 3. In other embodiments, the number of air springs 3 can also be set as needed.

[0053] Optionally, see Figure 2 The sub-frame assembly further includes an air storage tank 6, and the distribution valve 7 further includes a second output port, which is connected to the air storage tank 6 and can store compressed air through the air storage tank 6 and supply other components that need to use compressed air. Specifically, the second output port is connected to the air storage tank 6 through a second air supply branch pipeline 8.

[0054] Optionally, see Figure 4The subframe assembly further includes a plurality of brackets 23, which are fixed to the gas tank 6 and are used to connect the vehicle body. Specifically, in this embodiment, a scheme in which the number of brackets 23 is four is exemplarily provided. Two brackets 23 are arranged at the front side of the gas tank 6 and are arranged at intervals along the left-right direction of the vehicle, and the other two brackets 23 are arranged at the rear side of the gas tank 6 and are arranged at intervals along the left-right direction of the vehicle.

[0055] This embodiment also provides an air suspension assembly, including the above-mentioned subframe assembly. The air suspension assembly also includes a vehicle body and a lower arm, the subframe 1 is connected to the vehicle body, the air spring 3 is connected between the vehicle body and the lower arm, the air spring 3 is used to support the vehicle body, and can adjust the height of the vehicle body from the ground, and can also play a role in vibration reduction. The air compressor 2 is arranged in the subframe 1, which can effectively reduce the space occupied. In addition, the vibration generated by the air compressor 2 when working can be reduced by the first elastic member 4 for the first level, and then by the third elastic member 5 on the subframe 1 for the second level, which can reduce the vibration transmitted to the vehicle.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A subframe assembly, comprising a subframe (1), an air compressor (2) and an air spring (3), wherein the air compressor (2) is used to generate compressed air, and the compressed air generated by the air compressor (2) can be supplied to the air spring (3), characterized in that: The subframe (1) comprises at least two longitudinal beams and at least two transverse beams, each of the transverse beams being connected in sequence to the other transverse beams, a mounting portion being arranged inside one of the transverse beams or one of the longitudinal beams, and the air compressor (2) being arranged on the mounting portion.

2. The subframe assembly according to claim 1, characterized in that: The at least two cross beams include a front cross beam (13), the front cross beam (13) includes a first shell (131) and a second shell (132) that are detachably connected, the mounting portion is a receiving space enclosed by the first shell (131) and the second shell (132), the air compressor (2) is located in the receiving space, and the air compressor (2) is connected to the first shell (131) and / or the second shell (132).

3. The subframe assembly according to claim 2, characterized in that: The cross-section of the first shell (131) and the cross-section of the second shell (132) are both U-shaped.

4. The subframe assembly according to claim 2, characterized in that: The sub-frame assembly further comprises a first elastic member (4), the first elastic member (4) being located in the accommodating space, one end of the first elastic member (4) being connected to the air compressor (2), and the other end of the first elastic member (4) being supported on the first shell (131) or the second shell (132).

5. The subframe assembly according to claim 4, characterized in that: The sub-frame assembly further comprises a fastener (21) and a second elastic member (22); the fastener (21) passes through the first shell (131) or the second shell (132) and is connected to the first elastic member (4); the second elastic member (22) is located outside the accommodating space; the second elastic member (22) is sleeved on the fastener (21), and the second elastic member (22) elastically presses against the fastener (21) and one of the first shell (131) and the second shell (132).

6. The subframe assembly according to any one of claims 1 to 5, characterized in that: The subframe assembly further comprises a plurality of third elastic members (5) arranged on the subframe (1), wherein the third elastic members (5) are used to connect the subframe (1) and the vehicle body.

7. The subframe assembly according to any one of claims 1 to 5, characterized in that: The sub-frame assembly comprises a plurality of the air springs (3), and the sub-frame assembly further comprises a distribution valve (7), the distribution valve (7) comprises an input port and a plurality of first output ports, the air compressor (2) is connected to the input port, and the plurality of first output ports are connected to the plurality of the air springs (3) in a one-to-one correspondence.

8. The subframe assembly according to claim 7, characterized in that: The sub-frame assembly further comprises an air storage tank (6), and the distribution valve (7) further comprises a second output port, wherein the second output port is in communication with the air storage tank (6).

9. The subframe assembly according to claim 8, characterized in that: The sub-frame assembly further comprises a plurality of brackets (23), wherein the brackets (23) are fixed to the gas storage tank (6), and the brackets (23) are used to connect to the vehicle body.

10. An air suspension assembly, characterized in that: The air suspension assembly comprises the subframe assembly as claimed in any one of claims 1 to 9, wherein the air suspension assembly further comprises a vehicle body and a lower swing arm, the subframe (1) is connected to the vehicle body, and the air spring (3) is connected between the vehicle body and the lower swing arm.

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