Auxiliary frame and vehicle

Abstract

The utility model provides an auxiliary frame and a vehicle. The auxiliary frame comprises first beam bodies which are oppositely arranged in the first direction, second beam bodies which are oppositely arranged in the second direction, and a plurality of connecting structures which connect the adjacent first beam bodies and second beam bodies together. The two ends of the framework are connected with the first beam body and the second beam body respectively, the first lining and the second lining are arranged on the framework, the first lining can be connected with the vehicle body in the third direction, the second lining can be connected with the power assembly in the second direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other. According to the auxiliary frame, the connecting structures for connecting the first beam body and the second beam body together are arranged, the arrangement direction of the second lining can be changed by changing the connecting relation between the connecting structures and the first beam body and the second beam body, and therefore the arrangement diversity of the auxiliary frame can be achieved, the auxiliary frame can adapt to different vehicle types, and the service life of the auxiliary frame is prolonged. The development cost is reduced, and the platformization rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a subframe. Meanwhile, the utility model also relates to a vehicle provided with the subframe. Background Art

[0002] Platform-based production can shorten the development cycle, reduce the development cost, avoid the risk of real vehicle verification, improve the reliability of products, and shorten the development cycle of the whole vehicle. Therefore, in order to save costs and improve production efficiency, most automobile enterprises produce in a platform-based manner. The automobile platformization mainly focuses on main components such as subframes, vehicle bodies or powertrains. At present, the mounting bushings and mounts used to connect the subframe to the vehicle body are mainly designed based on the overall vehicle layout, NVH (Noise, Vibration, Harshness), handling stability, fatigue durability and other performances, resulting in a large variety of product development, high development and reliability verification costs, and a single applicable vehicle model. Summary of the Utility Model

[0003] In view of this, the utility model aims to provide a subframe which can be applicable to different vehicle model platforms and has good versatility.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A subframe includes first beam bodies arranged oppositely in a first direction, second beam bodies arranged oppositely in a second direction, and a plurality of connection structures connecting adjacent ones of the first beam bodies and the second beam bodies;

[0006] The connection structure includes a framework with two ends respectively connected to the first beam body and the second beam body, and a first bushing and a second bushing arranged on the framework. The first bushing can be connected to the vehicle body along a third direction, the second bushing can be connected to the powertrain along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other pairwise.

[0007] Furthermore, the framework is detachably connected to the first beam body and the second beam body respectively.

[0008] Furthermore, the framework includes a first split body and a second split body which are detachably connected. The first split body includes a first sleeve, and two connecting arms vertically arranged on the first sleeve. The second split body includes a second sleeve, and two extending arms arranged on two opposite sides of the second sleeve;

[0009] The first sleeve is used for installing the first bushing, and the second sleeve is used for installing the second bushing. One of the extension arms is detachably connected to one of the connecting arms, another extension arm is detachably connected to the second beam body, and another connecting arm is detachably connected to the first beam body.

[0010] Further, the connecting arm and the extension arm are inserted together and are connected by screwing with a threaded fastener; and / or,

[0011] Between another connecting arm and the first beam body, and between another extension arm and the second beam body, they are all inserted together and are connected by screwing with a threaded fastener.

[0012] Further, convex protrusions are provided on each of the connecting arms and the second beam body, and slots are provided on each of the extension arms and the first beam body;

[0013] Each of the protrusions is inserted into the corresponding slot, and through holes are provided for screwing through with threaded fasteners.

[0014] Further, the two connecting arms are symmetric about the central plane of the first sleeve; and / or,

[0015] The two extension arms are symmetric about the central plane of the second sleeve.

[0016] Further, a first reinforcing rib is provided between the first sleeve and the connecting arm, and a second reinforcing rib is provided between the second sleeve and the extension arm; and / or,

[0017] The first split body and the second split body are formed by aluminum alloy casting.

[0018] Further, the framework is integrally formed by casting and has a first part extending in a first direction and a second part extending in a second direction;

[0019] The first bushing is arranged at the intersection of the first part and the second part, and the second bushing is arranged on the first part.

[0020] Further, the first beam body and / or the second beam body are formed by aluminum alloy casting.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] For the subframe described in the present utility model, by providing a plurality of connection structures that connect the first beam body and the second beam body, and enabling the connection structures to have a first bushing and a second bushing, the arrangement direction of the second bushing can be changed by altering the connection relationship between both ends of the connection structure and the first beam body and the second beam body. Thus, the diversity of its arrangement can be achieved, enabling it to adapt to different vehicle models, having good versatility, reducing development costs, and increasing the platformization rate.

[0023] In addition, the framework is detachably connected to both the first beam body and the second beam body, which can reduce the volume of the workbench during bushing pressing, facilitate the repair and replacement of each component, and reduce after-sales maintenance costs. The framework includes a first split body and a second split body that are detachably connected, which is convenient for processing and manufacturing and can reduce after-sales maintenance costs.

[0024] Secondly, the connecting arm and the extension arm are inserted together and connected by a threaded fastener in a screwed manner. Also, between another connecting arm and the first beam body, and between another extension arm and the second beam body, they are all inserted together and connected by a threaded fastener in a screwed manner, all having the advantages of simple structure and being convenient for processing and manufacturing. By providing outwardly protruding protrusions on each connecting arm and the second beam body, and providing slots on each extension arm and the first beam body, it is beneficial to achieve rapid assembly positioning during production assembly and after-sales maintenance, and improve the fitting accuracy.

[0025] Symmetrizing the two connecting arms with respect to the central plane of the first sleeve, and symmetrizing the two extension arms with respect to the central plane of the second sleeve, can reduce the types of mold cavities developed for the first split body and the second split body, and reduce the process complexity and cost investment. A first reinforcing rib is provided between the first sleeve and the connecting arm, which can improve the structural strength of the first split body. And a second reinforcing rib is provided between the second sleeve and the extension arm, which can improve the structural strength of the second split body. And by casting the first split body and the second split body from aluminum alloy, not only can it have relatively high structural strength, but it is also beneficial for lightweight design.

[0026] In addition, casting the framework into shape is convenient for processing and manufacturing and has good structural strength. And by arranging the first bushing at the intersection of the first part and the second part, the setting strength of the first bushing can be improved. And by casting the first beam body and / or the second beam body from aluminum alloy, the overall structural strength of the subframe can be improved.

[0027] Another object of the present utility model is to provide a vehicle, on which the above-mentioned subframe is provided.

[0028] The vehicle described in the present utility model has all the beneficial effects of the above-mentioned subframe, which will not be elaborated herein. Description of the Drawings

[0029] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0030] Figure 1 It is an assembly state diagram of the subframe and the powertrain according to an embodiment of the present utility model;

[0031] Figure 2 It is a schematic structural diagram of the subframe according to an embodiment of the present utility model;

[0032] Figure 3 It is a schematic structural diagram of the skeleton according to an embodiment of the present utility model;

[0033] Figure 4 It is a sectional view of the skeleton according to an embodiment of the present utility model;

[0034] Figure 5 It is a schematic structural diagram of the first split according to an embodiment of the present utility model;

[0035] Figure 6 It is a schematic structural diagram of the first split from another perspective according to an embodiment of the present utility model;

[0036] Figure 7 It is a schematic structural diagram of the first bushing according to an embodiment of the present utility model;

[0037] Figure 8 It is a schematic structural diagram of the second split according to an embodiment of the present utility model;

[0038] Figure 9 It is a schematic structural diagram of the second split from another perspective according to an embodiment of the present utility model;

[0039] Figure 10 It is a schematic structural diagram of the first beam according to an embodiment of the present utility model;

[0040] Figure 11 It is a schematic structural diagram of the second beam according to an embodiment of the present utility model;

[0041] Figure 12 It is another schematic structural diagram of the skeleton according to an embodiment of the present utility model.

[0042] Explanation of reference numerals:

[0043] 1. First beam; 2. Second beam; 3. Skeleton; 4. First bushing; 5. Second bushing; 6. Powertrain;

[0044] 101. Connection hole;

[0045] 301. First split body; 3011. First sleeve; 3012. Connecting arm; 3013. Protrusion; 3014. First reinforcing rib; 3a. First part; 3b. Second part;

[0046] 302. Second split body; 3021. Second sleeve; 3022. Extension arm; 3023. Slot; 3024. Second reinforcing rib;

[0047] 401. Inner tube; 402. Outer tube; 403. Rubber body. Detailed implementation mode

[0048] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0049] In the description of the present utility model, it should be noted that the orientation terms such as "up, down, left, right, front, back" used in this embodiment are defined based on the up-down direction, left-right direction and front-back direction of the vehicle. Among them, the up-down direction of the vehicle is also the height direction (Z direction) of the vehicle, the front-back direction of the vehicle is also the length direction (X direction) of the vehicle, and the left-right direction of the vehicle is also the width direction (Y direction) of the vehicle. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection piece" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0051] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0052] This embodiment relates to a subframe. In terms of overall composition, it includes a first beam body 1 arranged oppositely in the first direction, a second beam body 2 arranged oppositely in the second direction, and a plurality of connection structures connecting the adjacent first beam body 1 and the second beam body 2. Among them, the connection structure includes a framework 3 with two ends respectively connected to the first beam body 1 and the second beam body 2, and a first bushing 4 and a second bushing 5 arranged on the framework 3. The first bushing 4 can be connected to the vehicle body along the third direction, the second bushing 5 can be connected to the power assembly 6 along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0053] The subframe of this embodiment is provided with a plurality of connecting structures that connect the first beam body 1 and the second beam body 2, and the connecting structures are provided with a first bushing 4 and a second bushing 5. Thus, by changing the connection relationship between the two ends of the connecting structure and the first beam body 1 and the second beam body 2, the arrangement direction of the second bushing 5 can be changed, so that its arrangement diversity can be realized, it can adapt to different vehicle models, has good versatility, reduces the development cost, and improves the platformization rate.

[0054] Based on the above overall introduction, an exemplary structure of the subframe of this embodiment is as Figure 1 and Figure 2 shown. The subframe is generally rectangular in shape, and based on Figure 2 the state shown, the first direction is the Figure 2 left - right direction in Figure 2 , and the second direction is the up - down direction in

[0055] In the prior art, the subframe has a large volume. When the bushing is pressed, the workbench has a large volume, and during after - sales maintenance, the entire subframe usually needs to be returned to the factory for replacement. In this embodiment, by detachably connecting the skeleton 3 to the first beam body 1 and the second beam body 2, the disadvantages of the production assembly line and the need to invest in large - scale bushing pressing equipment for after - sales maintenance can be avoided, which is beneficial for quick matching and replacement during the performance debugging of in - vehicle NVH and handling stability, etc. At the same time, it can also reduce the development and after - sales maintenance costs.

[0056] Among them, as a preferred embodiment, as Figure 3 and Figure 4 shown, the skeleton 3 of this embodiment includes a first split body 301 and a second split body 302 that are detachably connected, which is convenient for processing and manufacturing and can reduce the after - sales maintenance cost. And, as a preferred implementation manner, combined with Figure 5 and Figure 6 shown, the first split body 301 of this embodiment includes a first sleeve 3011 and two connecting arms 3012 vertically arranged on the first sleeve 3011. And combined with Figure 7 and Figure 8 shown, the second split body 302 includes a second sleeve 3021 and two extension arms 3022 arranged on two opposite sides of the second sleeve 3021.

[0057] In addition, combined with Figure 1 and Figure 2As shown in the figure, the first sleeve 3011 is used to install the first bushing 4, and the second sleeve 3021 is used to install the second bushing 5. One extension arm 3022 is detachably connected to one connecting arm 3012, the other extension arm 3022 is detachably connected to the second beam body 2, and the other connecting arm 3012 is detachably connected to the first beam body 1. In addition, as a further embodiment, both the first split body 301 and the second split body 302 of this embodiment are formed by die-casting aluminum alloy. Such a design not only facilitates the processing and manufacturing of the first split body 301 and the second split body 302, but also enables both to have good structural strength, and is also conducive to lightweight design. It should be noted that in addition to forming both the first split body 301 and the second split body 302 by die-casting aluminum alloy, other conventional processes can also be used.

[0058] Specifically, in combination with Figures 4 to 6 As shown in the figure, the first sleeve 3011 of the first split body 301 is generally cylindrical, and each connecting arm 3012 is generally rectangular and extends radially along the first sleeve 3011. One connecting arm 3012 extends in the first direction, and the other connecting arm 3012 extends in the second direction. The structure of the first bushing 4 is the same as that of the prior art, and as Figure 7 As shown in the figure, it includes an inner tube 401, an outer tube 402 sleeved outside the inner tube 401, and a rubber body 403 vulcanized between the inner tube 401 and the outer tube 402. Specifically, during assembly, the first split body 301 can be fixed by a tooling first, and then the first bushing 4 can be press-fitted into the first sleeve 3011 with interference by a press-fitting device. As Figure 6 As shown in the figure, as a further implementation manner, the two connecting arms 3012 are symmetric about the central plane of the first sleeve 3011. Such a design can reduce the types of mold cavities developed for the first split body 301, and reduce the process complexity and cost investment.

[0059] In addition, continue to refer to Figure 5 and Figure 6 As shown in the figure, as a further implementation manner, a first reinforcing rib 3014 is provided between the first sleeve 3011 and the connecting arm 3012. And, as a preferred implementation manner, as Figure 6As shown, first reinforcing ribs 3014 are provided on both sides between the first sleeve 3011 and each connecting arm 3012. And the first reinforcing ribs 3014 extend from the outer wall of the first sleeve 3011 to the side wall of the connecting arm 3012 and are triangular in shape. Thus, the first reinforcing ribs 3014 on both sides and the corresponding connecting arm 3012 approximately enclose a trapezoid. With this arrangement, not only can the overall structural strength of the first split part 301 be improved, but also, based on the characteristics that a triangle has good stability and a trapezoid is not easily deformed, the installation stiffness of the first bushing 4 can be enhanced and vibration transmission can be reduced. Here, it should be noted that the number and shape of the first reinforcing ribs 3014 can be adjusted accordingly according to design requirements.

[0060] In addition, continuing to refer to Figure 5 and Figure 6 As shown, in order to facilitate the overall lightweight design, weight-reducing grooves are provided on each connecting arm 3012 and the first reinforcing ribs 3014. Among them, as a preferred embodiment, the weight-reducing grooves are triangular in shape so as to utilize the characteristic that a triangle has good stability to ensure the structural strength of the first split part 301. In this embodiment, in order to achieve the detachable connection between the first split part 301 and the second split part 302, one connecting arm 3012 and one extension arm 3022 are inserted together and are connected by screwing with a threaded fastener. In addition, the other connecting arm 3012 and the first beam body 1, and the other extension arm 3022 and the second beam body 2 are also inserted together and are connected by screwing with a threaded fastener.

[0061] Based on this, as a preferred embodiment, in combination with Figure 5 and Figure 8 and Figure 10 As shown, convex protrusions 3013 are provided on each connecting arm 3012 and the second beam body 2, and slots 3023 are provided on each extension arm 3022 and the first beam body 1. At the same time, each protrusion 3013 is inserted into the corresponding slot 3023, and through holes for threaded fasteners are provided. This structure is simple and convenient for design and implementation. At the same time, it is also conducive to realizing rapid assembly positioning during production assembly and after-sales maintenance, and can improve the fitting accuracy.

[0062] At this time, in order to facilitate each protrusion 3013 to be inserted into the corresponding slot 3023, as Figure 6 As shown, as a preferred embodiment, the protrusion 3013 is in a "convex" shape and has a connecting part with a larger width and an end part with a smaller width. Thus, it is conducive for the end part to be inserted into the slot 3023 first, and then each protrusion 3013 can be quickly inserted into the corresponding slot 3023. It should be noted that in addition to setting the protrusion 3013 in a "convex" shape, it can also be set in a rectangular shape, and a guiding surface is provided at the end of the protrusion 3013 to guide the protrusion 3013 to be inserted into the slot 3023, which is also feasible.

[0063] As a preferred embodiment, the structure of the second split body 302 in this embodiment is as shown in Figure 8 and Figure 9 . Among them, the second sleeve 3021 is also cylindrical as a whole. The overall structure of the second bushing 5 is the same as that of the first bushing 4 described above, and mainly includes an outer tube 402, an inner tube 401, and a rubber body 403 connected between the two. Its specific structure can refer to the prior art. The two extension arms 3022 are respectively rectangles extending along the first direction to the two opposite sides of the second split body 302, and the above-mentioned slots 3023 are provided at the ends of each extension arm 3022, and mounting holes are provided through the slots 3023. Thus, threaded fasteners such as bolts can pass through the mounting holes and the through holes of the protrusions 3013 and then be screwed with nuts, so as to detachably connect the second split body 302 to the first split body 301 and the second beam body 2 together.

[0064] In addition, as a further implementation method, as shown in Figure 9 , the two extension arms 3022 are symmetric about the central plane of the second sleeve 3021. Such a setting can reduce the types of mold cavities developed for the second split body 302, and reduce the process complexity and cost investment. In addition, continue to refer to Figure 8 and Figure 9 . A second reinforcing rib 3024 is provided between the second sleeve 3021 and the extension arm 3022. And, as a preferred implementation method, as shown in Figure 9 , second reinforcing ribs 3024 are provided on both sides between the second sleeve 3021 and each extension arm 3022. And the second reinforcing rib 3024 extends from the outer wall of the second sleeve 3021 to the side wall of the extension arm 3022 and is triangular, so that the second reinforcing ribs 3024 on both sides and the corresponding extension arm 3022 approximately enclose a trapezoid.

[0065] Such a design can not only improve the overall structural strength of the second split body 302, but also, based on the characteristics that a triangle has good stability and a trapezoid is not easily deformed, improve the installation stiffness of the second bushing 5 and reduce vibration transmission. In addition, continue to refer to Figure 8 and Figure 9 . In order to facilitate the overall lightweight design, weight-reducing grooves are provided on each connecting arm 3012 and the second reinforcing rib 3024. It should be noted here that the number and shape of the second reinforcing rib 3024 can be adjusted according to design requirements.

[0066] As shown in Figure 1 and 10As shown in the figure, in this embodiment, as a preferred embodiment, the first beam body 1 is linear and extends along the second direction, and slot holes 3023 are respectively provided at both ends thereof, and through holes 101 are provided in a penetrating manner. Thus, after a threaded fastener such as a bolt passes through the through hole 101 and the through hole of the protrusion 3013 and is screwed with a nut, the first beam body 1 can be detachably connected to the first split body 301. In addition, to improve the use effect of the subframe, as a preferred embodiment, the first beam body 1 is formed by aluminum alloy casting, so that the first beam body 1 can not only have high structural strength, but also facilitate the lightweight design of the subframe.

[0067] The structure of the second beam body 2 in this embodiment is as shown in Figure 11 the figure. It is linear and extends along the first direction, and protrusions 3013 protruding outward along its length direction are respectively provided at both ends thereof. And, as a preferred embodiment, the protrusions 3013 on the second beam body 2 are also in a "convex" shape. Obviously, it is also feasible to set them in other shapes. In addition, to improve the use effect of the subframe, as a preferred embodiment, the second beam body 2 is also formed by aluminum alloy casting, so that it has high structural strength and is also conducive to the overall lightweight design of the subframe.

[0068] It should be noted here that in addition to being connected by the two structures of plugging and screwing between the two detachable connected components, the two components can also be detachably connected together only by the screwing structure. In addition, in addition to providing the protrusion 3013 on the connecting arm 3012 and the slot hole 3023 on the extending arm 3022, the protrusion 3013 can also be provided on the extending arm 3022, and the slot hole 3023 can be provided on the connecting arm 3012.

[0069] In addition, it should be noted that in addition to the above-mentioned frame 3 including the first split body 301 and the second split body 302 that are detachably connected. As another implementation manner, as shown in Figure 12 the figure, the frame 3 of this embodiment is integrally cast and formed, and has a first part 3a extending along the first direction and a second part 3b extending along the second direction. And, the first bushing 4 is provided at the intersection of the first part 3a and the second part 3b, and the second bushing 5 is provided on the first part 3a. This structure can make the frame 3 easy to process and manufacture and have good structural strength, and setting the first bushing 4 at the intersection of the first part 3a and the second part 3b can improve the setting strength of the first bushing 4.

[0070] By adopting the above structure, the subframe of this embodiment can make the first bushing 4 and the second bushing 5 have different stiffnesses based on the performance requirements such as NVH, handling stability, and fatigue durability. In addition, to achieve the installation of platform-based models, different specifications of subframes can be assembled by changing the lengths of the first beam body 1 and the second beam body 2, so that it has characteristics and advantages such as diversified assembly and diversified cooperation, which is convenient for the construction and building of platformization and serialization. Thus, the development risk and unnecessary cost investment of vehicle models can be reduced, the production ratio can be further increased, and the vehicle model benefits can be improved.

[0071] In addition, based on factors such as the layout position of the vehicle engine compartment, NVH, handling stability, fatigue durability performance, and uniform force on the bushing load, the assembly directions of both ends of the frame 3 with the first beam body 1 and the second beam body 2 can be changed to achieve the layout of the second bushing 5 in different directions, realizing the diversity design of the layout, further improving the compatibility of different positioning vehicle models with the product, and easily adapting to the changing performances such as the layout of the vehicle engine compartment and NVH performance, and it can have good versatility. For example, Figure 2 In a state, the first split body 301 of the frame 3 is connected to the first beam body 1, and the second split body 302 is connected to the second beam body 2. Thus, the axial direction of the second bushing 5 is arranged along the second direction. At this time, by changing the assembly direction, the first split body 301 of the frame 3 can be connected to the second beam body 2, and the second split body 302 can be connected to the first beam body 1. Thus, the axial direction of the second bushing 5 can be arranged along the first direction, which can meet the requirements of different vehicle models.

[0072] In addition, this embodiment also relates to a vehicle, and the above subframe is provided on the vehicle.

[0073] The vehicle of this embodiment has all the beneficial effects of the above subframe, which will not be elaborated here.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A subframe, characterized in that: It comprises first beam bodies (1) arranged opposite to each other in a first direction, second beam bodies (2) arranged opposite to each other in a second direction, and a plurality of connection structures for connecting adjacent first beam bodies (1) and second beam bodies (2); The connection structure comprises a frame (3) whose two ends are respectively connected to the first beam body (1) and the second beam body (2), and a first bushing (4) and a second bushing (5) arranged on the frame (3), wherein the first bushing (4) can be connected to the vehicle body along a third direction, and the second bushing (5) can be connected to the powertrain (6) along a second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The subframe according to claim 1, characterized in that: The frame (3) is detachably connected to the first beam body (1) and the second beam body (2).

3. The subframe according to claim 2, characterized in that: The frame (3) comprises a first split body (301) and a second split body (302) which are detachably connected, and the first split body (301) comprises a first sleeve (3011) and two connecting arms (3012) vertically arranged on the first sleeve (3011), and the second split body (302) comprises a second sleeve (3021) and two extension arms (3022) arranged on two opposite sides of the second sleeve (3021); The first sleeve (3011) is used for installing the first bushing (4), the second sleeve (3021) is used for installing the second bushing (5), one of the extension arms (3022) is detachably connected to one of the connecting arms (3012), the other of the extension arms (3022) is detachably connected to the second beam body (2), and the other of the connecting arms (3012) is detachably connected to the first beam body (1).

4. The subframe according to claim 3, characterized in that: The connecting arm (3012) and the extension arm (3022) are inserted together and screwed together by a threaded fastener; and / or, The other connecting arm (3012) and the first beam body (1), as well as the other extending arm (3022) and the second beam body (2), are inserted together and are screwed together via threaded fasteners.

5. The subframe according to claim 4, characterized in that: Each of the connecting arms (3012) and the second beam body (2) is provided with an outwardly protruding protrusion (3013), and each of the extending arms (3022) and the first beam body (1) is provided with a slot (3023); Each protrusion (3013) is inserted into the corresponding slot (3023) and is provided with a through hole through which the thread is fastened.

6. The subframe according to claim 3, characterized in that: The two connecting arms (3012) are symmetrical about the central plane of the first sleeve (3011); and / or, The two extension arms (3022) are symmetrical about the center plane of the second sleeve (3021).

7. The subframe according to claim 3, characterized in that: A first reinforcing rib (3014) is provided between the first sleeve (3011) and the connecting arm (3012), and a second reinforcing rib (3024) is provided between the second sleeve (3021) and the extending arm (3022); and / or, The first sub-body (301) and the second sub-body (302) are formed by casting of aluminum alloy.

8. The subframe according to claim 1, characterized in that: The frame (3) is integrally cast and has a first portion (3a) extending along a first direction, and a second portion (3b) extending along a second direction; The first bushing (4) is arranged at the intersection of the first part (3a) and the second part (3b), and the second bushing (5) is arranged on the first part (3a).

9. The subframe according to any one of claims 1 to 8, characterized in that: The first beam body (1) and / or the second beam body (2) are formed by casting of aluminum alloy.

10. A vehicle, characterized in that: The vehicle is provided with the subframe according to any one of claims 1 to 9.

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