Auxiliary frame and vehicle

Abstract

The utility model provides an auxiliary frame and a vehicle, and relates to the technical field of vehicles. The auxiliary frame comprises a frame body, the frame body comprises a bottom plate and a top plate which are connected, the top plate is stacked on the bottom plate, a cavity is formed between the top plate and the bottom plate, the frame body is provided with a plurality of hole groups, and the hole groups are provided with a plurality of mounting holes arranged at intervals; the plurality of reinforcing parts are arranged in the cavity and are at least connected with the bottom plate, one reinforcing part is arranged at the position of one hole group, and the plurality of mounting holes in one hole group penetrate through the same reinforcing part. And the longitudinal bearing capacity of the auxiliary frame can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, and in particular, to a subframe and a vehicle. BACKGROUND

[0002] In vehicle design, the main role of the subframe is to bear and transfer loads (such as lateral loads and longitudinal loads), and provide mounting interfaces for peripheral components. With the development of the automotive industry, the front subframe plays an increasingly important role in vehicle safety collisions. And with the performance of weight cost, arrangement, strength, stiffness, durability, modal, etc., the design challenge is also getting higher and higher.

[0003] The longitudinal bearing capacity of the existing subframe needs to be improved.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The present disclosure provides a subframe and a vehicle, which is beneficial to improve the longitudinal bearing capacity of the subframe.

[0006] According to one aspect of the present disclosure, a subframe is provided, comprising:

[0007] a frame body comprising a bottom plate and a top plate connected, the top plate being stacked on the bottom plate, a cavity being formed between the top plate and the bottom plate, the frame body having a plurality of hole groups arranged at intervals, each hole group having a plurality of mounting holes;

[0008] a plurality of reinforcing members arranged in the cavity and connected to at least the bottom plate, one reinforcing member being arranged at one hole group, and a plurality of mounting holes in one hole group penetrating the same reinforcing member.

[0009] In one embodiment of the present disclosure, the reinforcing member comprises a first reinforcing portion, a second reinforcing portion and a connecting portion, the first reinforcing portion and the second reinforcing portion being connected by the connecting portion.

[0010] In the same hole group, one of the adjacent mounting holes penetrates the first reinforcing portion, and the other mounting hole penetrates the second reinforcing portion.

[0011] In one embodiment of the present disclosure, the first reinforcing portion is provided with a first through hole, the second reinforcing portion is provided with a second through hole, the axis of the first through hole, the axis of the second through hole and the axis of the mounting hole are parallel to each other, and the diameter of the first through hole and the diameter of the second through hole are both greater than the diameter of the mounting hole.

[0012] In an embodiment of the present disclosure, the peripheral wall of the first reinforcing part has a first gap, the first gap is in communication with the first through hole, the first gap extends along the axial direction of the first through hole, and the first gap penetrates the peripheral wall of the first reinforcing part.

[0013] In an embodiment of the present disclosure, the peripheral wall of the second reinforcing part has a second gap, the second gap is in communication with the second through hole, the second gap extends along the axial direction of the second through hole, and the second gap penetrates the peripheral wall of the second reinforcing part.

[0014] In an embodiment of the present disclosure, the connecting part is provided with a folded part, the folded part is located on the side of the connecting part close to the bottom plate, the folded part is connected with the bottom plate, and the side of the connecting part away from the bottom plate is connected with the top plate.

[0015] In an embodiment of the present disclosure, the reinforcing part further comprises an auxiliary part, the auxiliary part is connected with the first reinforcing part, and the auxiliary part is connected with the top plate and the bottom plate, respectively.

[0016] In an embodiment of the present disclosure, the included angle between the auxiliary part and the connecting part is less than 90 degrees.

[0017] In an embodiment of the present disclosure, the side of the auxiliary part away from the bottom plate is provided with a bent part, and the bent part is connected with the top plate.

[0018] In an embodiment of the present disclosure, the connecting part and the auxiliary part are each provided with at least one lightening hole.

[0019] In an embodiment of the present disclosure, the side of the top plate close to the bottom plate is provided with a groove, and the side of the connecting part away from the bottom plate is connected with the groove bottom.

[0020] In an embodiment of the present disclosure, the number of reinforcing parts is two, and the two reinforcing parts are symmetrically arranged in two adjacent mounting holes on both sides of the bottom plate.

[0021] According to another aspect of the present disclosure, a vehicle is provided, comprising the auxiliary frame according to any one of the above embodiments.

[0022] The subframe and vehicle of the present disclosure, on the one hand, by setting multiple reinforcing members in the cavity, and one reinforcing member at each mounting hole of the hole group, in the vehicle collision test, the longitudinal load of the subframe can be transmitted through the reinforcing member, improving the longitudinal bearing capacity and strength of the subframe, making up for the defect of low longitudinal bearing capacity caused by the mounting hole on the frame body, improving the reliability of the vehicle. On the other hand, by forming a cavity between the bottom plate and the top plate, and placing multiple reinforcing members in the cavity, it is beneficial to reduce the weight of the subframe, thereby reducing the weight and cost of the vehicle, facilitating the lightweight of the vehicle, and improving the cruising range of the vehicle.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the present disclosure, and together with the specification, serve to explain the principles of the present disclosure. It is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0025] Figure 1 is a top view of the subframe in the embodiment of the present disclosure.

[0026] Figure 2 is a structural schematic view of the subframe hidden behind the top plate in the embodiment of the present disclosure.

[0027] Figure 3 is Figure 1 is a sectional view of A-A in FIG.

[0028] Figure 4 is a partial structural schematic view of the subframe in the embodiment of the present disclosure, which is intended to show the structure of the reinforcing member.

[0029] Figure 5 is a structural schematic view of the reinforcing member in the embodiment of the present disclosure.

[0030] Figure 6 is a partial structural schematic view of the subframe in the embodiment of the present disclosure, which is intended to show the structure of the connecting member.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1, frame body; 11, bottom plate; 12, top plate; 121, groove; 13, cavity; 14, mounting hole; 15, connecting sleeve; 2, reinforcing member; 21, first reinforcing portion; 211, first through hole; 212, first gap; 22, second reinforcing portion; 221, second through hole; 222, second gap; 23, connecting portion; 24, folded portion; 25, auxiliary portion; 26, bent portion; 27, weight-reducing hole; 3, middle tower; 31, connecting member; 311, notch; 4, connecting plate; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0033] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the specification. Moreover, the figures can not be to scale and some features can be exaggerated to show details of particular implementations. Measures of thicknesses and lengths and the like can not be drawn to scale for clarity.

[0034] The terms "one", "a", "an", "the", and "at least one" are used to indicate that "one or more" of the identified element(s) / component(s) / etc. is / are present; the term "or" is used to indicate a disjunction, including the conjunctive sense; and the term "comprises" and variations of the term, such as "comprising" and "comprises", mean "including but not limited to", and is used in the inclusive sense, and does not exclude additional unrecited elements / components / etc.; and the terms "first", "second", and "third", etc. are merely labels to indicate whether the objects so described are of different nature or function in the structure, and are not intended to limit the number of objects so described.

[0035] The first direction X, the second direction Y, and the third direction Z herein are directions that are orthogonal to each other. The lateral direction is the first direction X.

[0036] The vehicle according to an embodiment of the present disclosure can include a main frame, a sub-frame, a steering machine, a stabilizer bar, an axle, a suspension, a vehicle body, and an exhaust pipe. The main frame can be connected to the steering machine, the axle, the suspension, the vehicle body, and the exhaust pipe through the sub-frame, and the connection mode can be welding or bolting, so as to serve as a support structure of the vehicle.

[0037] The load transmission path of the sub-frame is generally divided into a lateral transmission path and a longitudinal transmission path. However, in the crash test of the vehicle, the load bearing capacity of the longitudinal transmission path of the sub-frame is insufficient, which causes the sub-frame to be easily deformed, thereby affecting the reliability of the vehicle.

[0038] To solve the above problems, in an embodiment of the present disclosure, referring to Figure 1 , Figure 2 , Figure 3The subframe includes a frame body 1 and multiple reinforcing members 2. The frame body 1 includes a connected base plate 11 and a top plate 12, with the top plate 12 stacked on top of the base plate 11, forming a cavity 13 between the base plate 11 and the top plate 12. The frame body 1 has multiple sets of holes arranged at intervals, each set including multiple mounting holes 14. The sets of holes are distributed along a first direction X, and at least one set of mounting holes 14 is distributed at intervals along a second direction Y. The mounting holes 14 are used to mount steering gears and stabilizer bars. Multiple reinforcing members 2 are disposed within the cavity and are at least connected to the base plate 11. Each reinforcing member 2 is located at one set of holes, and multiple mounting holes 14 in the same set of holes penetrate the same reinforcing member 2.

[0039] In the embodiments of this disclosure, on the one hand, by providing multiple reinforcing members 2 in the cavity 13 and providing one reinforcing member 2 at each of the multiple mounting holes 14 in a hole group, the longitudinal load of the subframe can be transferred through the reinforcing members 2 during vehicle crash testing, thereby improving the longitudinal load-bearing capacity and strength of the subframe. This compensates for the deficiency of insufficient longitudinal load-bearing capacity caused by the mounting holes 14 on the frame, and improves the reliability of the vehicle. On the other hand, by forming a cavity 13 between the bottom plate 11 and the top plate 12 and placing multiple reinforcing members 2 in the cavity, it is beneficial to reduce the weight of the subframe, thereby reducing the weight and cost of the vehicle, facilitating vehicle lightweighting, and improving the vehicle's driving range.

[0040] The structure of the subframe provided in this embodiment will now be described.

[0041] In one embodiment of this disclosure, see Figure 3 The base plate 11 has folded edges on both sides, and the two folded edges are bent along the side close to the top plate 12. The bending angle of the folded edges can not exceed 90°.

[0042] See Figure 3 The bottom plate 11 and the top plate 12 are fastened and welded together, forming a cavity 13 between the top plate 12 and the bottom plate 11 to reduce the weight of the frame 1.

[0043] In one embodiment of this disclosure, see Figure 1 , Figure 3 There are two sets of holes, symmetrically distributed about the longitudinal centerline of the frame 1. Each set contains two mounting holes 14, with the two mounting holes 14 in one set spaced apart along the second direction Y. One mounting hole 14 in the same set is used to connect to the steering gear support tube via bolts, and the other mounting hole 14 is used to connect to the stabilizer bar via bolts, thus enabling the installation of the steering gear and stabilizer bar on the subframe. There are two reinforcing members 2, one located at each set of holes. The reinforcing members 2 can be installed in the cavity 13 of the frame 1 by welding, bolting, or other methods.

[0044] In one embodiment of this disclosure, seeFigure 4 、 Figure 5 The reinforcing member 2 comprises a first reinforcing portion 21, a second reinforcing portion 22 and a connecting portion 23. The first reinforcing portion 21 and the second reinforcing portion 22 are welded through the connecting portion 23, and the connecting portion 23 is welded with the bottom plate 11. In two adjacent mounting holes 14 of the same hole group, one mounting hole 14 penetrates the first reinforcing portion 21, and the other mounting hole 14 penetrates the second reinforcing portion 22. In this way, the strength of the mounting hole 14 on the frame body 1 can be increased through the first reinforcing portion 21 and the second reinforcing portion 22, and the connecting portion 23 connects the first reinforcing portion 21 and the second reinforcing portion 22 as a whole, which facilitates to improve the longitudinal bearing capacity of the subframe.

[0045] In an embodiment of the present disclosure, the connecting portion 23 can be a straight plate structure or a curved plate structure, so as to facilitate to improve the longitudinal bearing capacity of the subframe.

[0046] In an embodiment of the present disclosure, referring to Figure 4 、 Figure 5 The first reinforcing portion 21 is provided with a first through hole 211, and the second reinforcing portion 22 is provided with a second through hole 221. The axis of the first through hole 211, the axis of the second through hole 221 and the axis of the mounting hole 14 are parallel to each other. The diameter of the first through hole 211 and the diameter of the second through hole 221 are both greater than the diameter of the mounting hole 14, so as to prevent the bolt from being stuck in the first reinforcing portion 21 and the second reinforcing portion 22, and facilitate the smooth installation of the bolt. In an example, the first through hole 211 and one mounting hole 14 are coaxially arranged, and the second through hole 221 and the other mounting hole 14 are coaxially arranged.

[0047] In an embodiment of the present disclosure, the first reinforcing portion 21 and the second reinforcing portion 22 are both hollow cylindrical. In other words, the first reinforcing portion 21 and the second reinforcing portion 22 have the same structure.

[0048] In an embodiment of the present disclosure, referring to Figure 5 The peripheral wall of the first reinforcing portion 21 has a first gap 212, the first gap 212 communicates with the first through hole 211, the first gap 212 extends along the axis direction of the first through hole 211, and the first gap 212 penetrates the peripheral wall of the first reinforcing portion 21. In this way, the first gap 212 is arranged on the peripheral wall of the first reinforcing portion 21, which can reduce the weight of the first reinforcing portion 21 and facilitate the lightweight of the subframe.

[0049] In an embodiment of the present disclosure, referring to Figure 5The circumferential wall of the second reinforcing portion 22 is provided with a second gap 222, the second gap 222 is in communication with the second through hole 221, the second gap 222 extends along the axis direction of the second through hole 221, and the second gap 222 penetrates through the circumferential wall of the second reinforcing portion 22. In this way, the second gap 222 provided on the circumferential wall of the second reinforcing portion 22 can reduce the weight of the second reinforcing portion 22, which is conducive to the light weight of the auxiliary frame.

[0050] In an embodiment of the present disclosure, referring to Figure 4 、 Figure 5 The connecting portion 23 is provided with a folded portion 24, the folded portion 24 is located on the side of the connecting portion 23 close to the bottom plate 11, the folded portion 24 is integrally connected with the connecting portion 23, the folded portion 24 is welded with the bottom plate 11, the bottom plate 11 can be provided with a welding hole for welding with the folded portion 24, and the side of the connecting portion 23 away from the bottom plate 11 is welded with the top plate 12. In this way, the folded portion 24 can increase the contact area of the connecting portion 23 and the bottom plate 11, which is conducive to the welding of the connecting portion 23 and the bottom plate 11.

[0051] In an embodiment of the present disclosure, referring to Figure 4 、 Figure 5 The reinforcing member 2 further comprises an auxiliary portion 25, the auxiliary portion 25 can extend in the first direction, the auxiliary portion 25 is connected with the first reinforcing portion 21, and the auxiliary portion 25 is connected with the top plate and the bottom plate 11 respectively. In this way, the auxiliary portion 25 can increase the strength of the reinforcing member 2, so as to further improve the longitudinal bearing capacity of the auxiliary frame.

[0052] In an embodiment of the present disclosure, the included angle between the auxiliary portion 25 and the connecting portion 23 is less than 90 degrees. For example, the included angle between the auxiliary portion 25 and the connecting portion 23 can be 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, etc. In this way, the space occupied by the reinforcing member 2 can be reduced, and the space utilization rate can be improved.

[0053] In an embodiment of the present disclosure, referring to Figure 4 、 Figure 5 The side of the auxiliary portion 25 away from the bottom plate 11 is provided with a bent portion 26, the bent portion 26 is welded with the top plate, and the top plate can be provided with a welding hole for welding with the bent portion 26. In this way, the bent portion 26 can increase the contact area of the auxiliary portion 25 and the top plate, so as to facilitate the welding of the top plate and the bent portion 26, and further facilitate the fixation of the auxiliary portion 25.

[0054] In an embodiment of the present disclosure, referring to Figure 5The connecting part 23 is integrally connected to the second reinforcing part 22, which is formed by a tube rolling process. The auxiliary part 25 is integrally connected to the first reinforcing part 21, which is also formed by a tube rolling process, and the connecting part 23 is welded to the first reinforcing part 21. Thus, the first reinforcing part 21 and the second reinforcing part 22 are formed by a tube rolling process, resulting in stable process quality, fewer process steps, and cost savings.

[0055] In one embodiment of this disclosure, see Figure 4 , Figure 5 Both the connecting part 23 and the auxiliary part 25 are provided with at least one weight-reducing hole 27. In one example, both the connecting part 23 and the auxiliary part 25 have three weight-reducing holes 27 to reduce weight, save materials, and reduce costs.

[0056] In one embodiment of this disclosure, see Figure 3 The top plate 12 has a groove 121 on the side near the bottom plate 11. The side of the connecting part 23 away from the bottom plate 11 is welded to the bottom of the groove 121. The side of the top plate 12 away from the groove 121 protrudes in the direction away from the bottom plate 11 at the groove 121. In this way, the groove 121 on the top plate 12 facilitates the positioning of the connecting part 23.

[0057] In one embodiment of this disclosure, see Figure 2 , Figure 3 There are two reinforcing members 2, which are symmetrically arranged about the longitudinal centerline of the frame 1. The connecting part 23 is welded to the bottom plate 11 and the top plate 12, so that the connecting part 23, the bottom plate 11, and the top plate 12 together form a "U"-shaped reinforcing cavity, which improves the strength of the frame 1. In this way, the load in the second direction Y can be divided into two transmission paths. One load transmission path is transmitted by one reinforcing member 2, and the other load transmission path is transmitted by the other reinforcing member 2, thereby improving the strength and modal characteristics of the frame 1 and facilitating the transmission of the load in the second direction Y during collision testing.

[0058] In one embodiment of this disclosure, the subframe further includes a plurality of center towers 3, which are disposed at the edges of the frame body 1, with at least two center towers 3 located on both sides of the frame body 1. The center towers 3 extend in a third direction Z and are provided with connectors 31 for connecting to the vehicle body. For example, see... Figure 1 , Figure 2The number of the middle towers 3 can be two, and the two middle towers 3 are connected with the edges of the frame body 1 and located on both sides of the frame body 1. The middle towers 3 protrude along the third direction Z, and each of the sides of the two middle towers 3 away from each other is provided with a connecting piece 31 which can be disconnected with the vehicle body during the collision process. In this way, the middle towers 3 are connected with the vehicle body through the connecting pieces 31, and the connecting pieces 31 can be disconnected with the vehicle body in the collision test of the vehicle so as to transmit the load in the first direction X to the auxiliary frame.

[0059] In an embodiment of the present disclosure, referring to Figure 2 and Figure 6 The connecting pieces 31 extend along the third direction Z and are welded with the middle towers 3. The connecting pieces 31 have through grooves which extend along the third direction Z. The peripheral walls of the connecting pieces 31 have notches 311 which extend along the third direction Z and are arranged through the connecting pieces 31. The notches 311 are located on the sides of the two connecting pieces 31 away from each other. In other words, the connecting pieces 31 are connecting pipes provided with slits which extend through the connecting pipes along the axial direction of the connecting pipes. In this way, the vehicle body can be connected with the middle towers 3 by means of bolts passing through the through grooves, and the bolts can be disconnected from the notches 311 in the collision test of the vehicle so as to transmit the load in the first direction X to the auxiliary frame. Compared with the disconnection structure of the split type, this design not only simplifies the assembly process required by the split structure, but also achieves the purpose of weight reduction and cost reduction.

[0060] In an embodiment of the present disclosure, the material of the connecting pieces 31 can be stainless steel, which facilitates the disconnection of the vehicle body and the middle towers 3.

[0061] In an embodiment of the present disclosure, the connecting pieces 31 can be clamping structures, for example, the clamping structure can be a clamp. The clamping structure can clamp the bolts, and in the collision test of the vehicle, the clamping structure can loosen the bolts so as to realize the disconnection of the vehicle body and the middle towers 3.

[0062] In an embodiment of the present disclosure, the frame body 1 is provided with a relief hole which extends through the frame body 1 along the third direction Z, that is, the relief hole extends through the bottom plate 11 and the top plate 12 and is located between the two reinforcing pieces 2. In this way, the motor of the steering machine can be arranged in the relief hole, and the relief hole can provide a certain relief space for different types of steering machines, so that different types of steering machines can be installed on the auxiliary frame, improving the compatibility of the auxiliary frame and reducing the weight of the auxiliary frame.

[0063] In an embodiment of the present disclosure, referring to Figures 1-3The auxiliary frame further comprises a connecting sleeve 15 installed in the avoiding hole, the connecting sleeve 15 is connected with the bottom plate 11 and the top plate 12 respectively, the connecting mode can be welding, bolting and the like, and the motor of the steering engine can be located in the connecting sleeve 15. In this way, by installing the connecting sleeve 15 in the avoiding hole, the strength of the frame body 1 at the avoiding hole can be improved.

[0064] In one embodiment of the present disclosure, referring to Figure 1 、 Figure 2 The auxiliary frame further comprises two connecting plates 4, the two connecting plates 4 are respectively arranged on two sides of the bottom plate 11 along the second direction Y, and the connecting plate 4 is connected with the bottom plate 11 by welding or bolting. In this way, the main frame can be connected with the auxiliary frame through the connecting plate 4, which is conducive to improving the strength of the auxiliary frame.

[0065] Other embodiments of the present disclosure will be apparent to those skilled in the art after consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptive changes of this disclosure that follow the general principles of the present disclosure and include common knowledge or conventional technical means in the art not disclosed by the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A subframe characterized by, The utility model relates to a kind of reinforced shelf, including: Frame body (1), including connected bottom plate (11) and top plate (12), the top plate (12) is stacked on the bottom plate (11), cavity (13) is formed between the top plate (12) and the bottom plate (11), the frame body (1) has a plurality of hole groups arranged at intervals, the hole group has a plurality of mounting holes (14); A plurality of reinforcing members (2) are arranged in the cavity (13), and at least the bottom plate (11) is connected, a reinforcing member (2) is arranged at a hole group, and a plurality of mounting holes (14) in a hole group penetrate the same reinforcing member (2).

2. The subframe of claim 1, wherein The reinforcing member (2) includes a first reinforcing portion (21), a second reinforcing portion (22) and a connecting portion (23), the first reinforcing portion (21) and the second reinforcing portion (22) are connected by the connecting portion (23); In the adjacent two mounting holes (14) of the same hole group, one mounting hole (14) penetrates the first reinforcing portion (21), and the other mounting hole (14) penetrates the second reinforcing portion (22).

3. The subframe of claim 2, wherein The first reinforcing portion (21) is provided with a first through hole (211), the second reinforcing portion (22) is provided with a second through hole (221), the axis of the first through hole (211), the axis of the second through hole (221) and the axis of the mounting hole (14) are parallel to each other, and the diameter of the first through hole (211) and the diameter of the second through hole (221) are both greater than the diameter of the mounting hole (14).

4. The subframe of claim 3, wherein The peripheral wall of the first reinforcing portion (21) has a first gap (212), the first gap (212) communicates with the first through hole (211), the first gap (212) extends along the axis direction of the first through hole (211), and the first gap (212) penetrates the peripheral wall of the first reinforcing portion (21).

5. The subframe of claim 3, wherein The peripheral wall of the second reinforcing portion (22) has a second gap (222), the second gap (222) communicates with the second through hole (221), the second gap (222) extends along the axis direction of the second through hole (221), and the second gap (222) penetrates the peripheral wall of the second reinforcing portion (22).

6. The subframe of claim 3, wherein The connecting portion (23) is provided with a folded portion (24), the folded portion (24) is located on the side of the connecting portion (23) close to the bottom plate (11), the folded portion (24) is connected with the bottom plate (11), and the side of the connecting portion (23) away from the bottom plate (11) is connected with the top plate (12).

7. The subframe of claim 3, wherein The reinforcing member (2) further includes an auxiliary portion (25), the auxiliary portion (25) is connected with the first reinforcing portion (21), and the auxiliary portion (25) is connected with the top plate (12) and the bottom plate (11) respectively.

8. The subframe of claim 7, wherein The included angle between the auxiliary portion (25) and the connecting portion (23) is less than 90 degrees.

9. The subframe of claim 7, wherein The side of the auxiliary portion (25) away from the bottom plate (11) is provided with a bending portion (26), and the bending portion (26) is connected with the top plate (12).

10. The subframe of claim 9, wherein The connecting portion (23) and the auxiliary portion (25) are each provided with at least one lightening hole (27).

11. The subframe of claim 2, wherein The top plate (12) is provided with a groove (121) near one side of the bottom plate (11), and the connecting part (23) is connected with the groove bottom of the groove (121) away from one side of the bottom plate (11).

12. Subframe according to any one of claims 1 to 11, characterized in that The number of the reinforcing pieces (2) is two, and the two reinforcing pieces (2) are symmetrically arranged in two adjacent mounting holes (14) on both sides of the bottom plate (11).

13. A vehicle characterized by comprising: The auxiliary frame comprises the auxiliary frame according to any one of claims 1-12.

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