CN220721191U

CN220721191U - Auxiliary frame reinforcing structure, auxiliary frame and vehicle

Info

Publication number: CN220721191U
Application number: CN202322388230.7U
Authority: CN
Inventors: 杜晓跃; 岳志强; 陈帅彰; 梁勇; 马显; 祁小岑; 王骋; 王庆峰
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-05
Anticipated expiration: 2033-09-04

Abstract

The application discloses auxiliary frame additional strengthening, auxiliary frame and vehicle relates to car technical field, additional strengthening includes the frame longeron, the frame longeron is connected with the automobile body, the frame longeron includes the main part section, the tip of main part section extends along being close to the direction of automobile body forms the extension section, the width of extension section is from being close to main part section one end to keeping away from main part section one end increases gradually, the extension section is kept away from the tip edge of main part section one end is the arc; the extension section is provided with a first mounting hole for connecting the vehicle body. According to the auxiliary frame, the extension section is arranged at the end part of the main body section of the frame longitudinal beam, and serves as a rear mounting point of the auxiliary frame, the local structural strength is increased by optimizing the appearance of the extension section, the connection strength of the auxiliary frame and the vehicle body is improved, the auxiliary frame is light in weight and low in cost, the vibration transmission sensitivity is reduced, and structural support is provided for the whole vehicle to construct a quiet and comfortable space.

Description

Auxiliary frame reinforcing structure, auxiliary frame and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to a subframe reinforcing structure, a subframe and a vehicle.

Background

The auxiliary frame of the hybrid electric vehicle mainly carries tire load and motion excitation, steering system load and motion excitation and power system vibration excitation, the strength of the mounting points of the auxiliary frame directly influences the vibration noise level of the whole vehicle caused by the transmission of the tire, steering system and power system excitation to the vehicle body, and the reliable durability of the running system, steering system and power system, and meanwhile, the mounting points of the vehicle operation stability can be required to have stronger rigidity, so that the auxiliary frame has better strength foundation when the vehicle is operated stably.

The existing auxiliary frame is weaker than a vehicle body connection structure, so that the vibration excitation transmission path of a mounting point is poor in attenuation, the problem of noise vibration in the vehicle is easily caused, and the current conventional method is to improve the connection strength by adopting modes of structural increase, size increase, thickness thickening and the like on the mounting point position, so that the weight and the cost are greatly increased.

Disclosure of Invention

In view of this, the present application aims to provide a subframe reinforcing structure, so as to solve the problems of weaker subframe and vehicle body connection structure, and high weight and cost of the existing reinforcing structure.

In order to achieve the above purpose, the technical scheme of the application is realized as follows:

a subframe reinforcing structure comprising a frame rail connected to a vehicle body; the frame rail includes a main body section; the end part of the main body section extends along the direction close to the vehicle body to form an extension section, the width of the extension section gradually increases from one end close to the main body section to one end far from the main body section, and the edge of one end of the extension section far from the main body section is arc-shaped; the extension section is provided with a first mounting hole for connecting the vehicle body.

Through above-mentioned technical scheme, set up the extension section at the tip of main part section, the width of extension section is from being close to main part section one end to keeping away from main part section one end and increase gradually, forms the structure of like loudspeaker form, and the tip edge that main part section one end was kept away from to the extension section simultaneously is the arc, and the rear mounting point that the extension section was regarded as the sub vehicle frame is used for connecting the automobile body, through optimizing the appearance of extension section, has increased structural strength to strengthened the sub vehicle frame and the connection of automobile body, processing is convenient, does not excessively increase materials and weight, low cost.

Further, the auxiliary frame reinforcing structure is applied to connection of an auxiliary frame and a vehicle body of a vehicle, the vehicle comprises a stabilizer bar, the auxiliary frame comprises a swing arm, and the reinforcing structure further comprises a mounting bracket for mounting the swing arm; the main body section is provided with a mounting part, and one side of the mounting bracket and the stabilizer bar are connected to the main body section through the mounting part.

Through above-mentioned technical scheme, through setting up the installation department at the main part section of frame longeron, make one side of stabilizer bar and installing support be connected to the installation department jointly, and then make stabilizer bar and installing support can be in same position and frame longeron zonulae occludens, increase joint strength each other, compare and connect respectively in different positions, the connection structure that needs is fewer, is favorable to reducing weight.

Further, the mounting bracket comprises a first connecting part, a swing arm connecting part and a second connecting part which are connected in sequence, wherein the first connecting part and the second connecting part are respectively positioned at two sides of the swing arm connecting part;

the swing arm connecting part is connected with the swing arm;

the first connecting part and the stabilizer bar are connected to the main body section through the mounting part;

the second connecting part is provided with a second mounting hole for connecting the vehicle body.

Through above-mentioned technical scheme, the swing arm connecting portion of installing support is used for installing the swing arm, first connecting portion is used for connecting the main part section of frame longeron and first connecting portion all is connected to the installation department with the stabilizer bar on, the second connecting portion then is used for connecting the automobile body, the installing support is as the installation basis of swing arm on the one hand, borrow the intensity of frame longeron and the intensity of automobile body to promote swing arm mounted position's intensity and vibration damping ability jointly, on the other hand installing support also is as the rear mounting point of sub vehicle frame, be used for being connected with the automobile body, span is big between second mounting hole and the first mounting hole, and then span is big between two rear mounting points of sub vehicle frame, it is big with automobile body contact cross-section, connect more firmly, possess higher torsional property simultaneously.

Further, an included angle exists between the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are located on different planes respectively.

Through the technical scheme, an included angle exists between the first connecting part and the second connecting part and is respectively located on different planes, and then two side installation parts of the installation support form diagonal structures, exciting forces are located on different planes when two sides are stressed, so that exciting force loading energy of the middle part of the installation support is reduced, meanwhile, the exciting forces received by the two sides are not located on the same plane, torsion angles are increased due to the fact that the two sides are affected by each other, and accordingly force decomposition is reduced.

Further, the mounting part comprises a mounting seat and a bolt fastener;

the middle part of the mounting seat is arched, the size of the arch is matched with the size of the stabilizer bar, and bolt holes matched with the bolt fasteners are respectively formed at two ends of the mounting seat;

the stabilizer bar is mounted below the mounting seat and is connected to the main body section together with the first connecting portion by the bolt fastener.

Through above-mentioned technical scheme, stabilizer bar and first connecting portion can utilize same set of bolt fastener to install on the frame longeron to reduce cost and weight.

Further, the bolt fastener comprises a bolt and a nut, wherein a plurality of protrusions are arranged on the edge of the nut, and the protrusions are distributed at intervals around the periphery of the nut.

Through above-mentioned technical scheme, set up a plurality of archs in the periphery of nut, increase the area of contact of nut and mount pad when being favorable to locking to strengthen the connection, ensure to connect firmly.

Further, the protrusions are provided in four, and the four protrusions are uniformly distributed around the periphery of the nut.

Further, the extension section is in threaded connection with the vehicle body, and the second connecting portion is in threaded connection with the vehicle body.

Compared with the prior art, the auxiliary frame reinforcing structure has the following advantages:

(1) According to the auxiliary frame reinforcing structure, the extension section is arranged at the end part of the main body section of the frame longitudinal beam and used as a rear mounting point of the auxiliary frame for connecting a vehicle body, the extension section is gradually increased in width from one end close to the main body section to one end far away from the main body section by optimizing the appearance of the extension section, a horn-like structure is formed, meanwhile, the edge of the end part of the extension section far away from one end of the main body section is arc-shaped, the structural strength is improved, the connection strength of the auxiliary frame and the vehicle body is improved on the premise that materials and weight are not excessively increased, so that vibration transmission sensitivity is reduced, and structural support is provided for the whole vehicle to construct a quiet and comfortable space; meanwhile, the joint of the auxiliary frame and the vehicle body is reinforced, the risk of local tearing under the severe driving working condition can be avoided, the durability and safety of the vehicle are improved, and the stability of operation can be improved when the operation is carried out.

(2) The application sub vehicle frame additional strengthening, through setting up the installation department at the main part section of frame longeron, be connected to the installation department jointly with one side of stabilizer bar and installing support for stabilizer bar and installing support can be in same position and frame longeron zonulae occludens, increase joint strength each other, compare in prior art stabilizer bar and installing support respectively and connect in the different positions of frame longeron moreover, the fastening connection spare that this application needs is less, is favorable to saving material cost, weight reduction.

(3) In the sub-frame additional strengthening, the swing arm connecting portion of installing support is arranged in installing the swing arm, first connecting portion is used for connecting the frame longeron, the second connecting portion is then used for connecting the automobile body, on the one hand, the installing support is as the installation basis of swing arm, borrow the intensity of frame longeron and the intensity of automobile body to promote swing arm mounted position's intensity and vibration damping ability jointly, on the other hand installing support is also used for being connected with the automobile body as the rear mounting point of sub-frame, two rear mounting points of sub-frame are located frame longeron and installing support respectively, compare the mode of all setting up the rear mounting point on frame longeron in prior art, two rear mounting point spans of sub-frame can be designed more, and then increase the contact cross section with the automobile body in this application, make the connection more firm, improve torsional property.

The application also provides a sub vehicle frame to solve the problem that sub vehicle frame and automobile body connection structure are weaker among the prior art, current additional strengthening's weight and cost are higher.

A subframe comprising a subframe reinforcing structure as described above.

The auxiliary frame and the auxiliary frame reinforcing structure have the same advantages compared with the prior art, and are not described in detail herein.

The application also proposes a vehicle comprising a subframe reinforcing structure as described above or comprising a subframe as described above.

The vehicle and the auxiliary frame reinforcing structure have the same advantages as those of the prior art, and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:

fig. 1 is a schematic structural view of a subframe according to an embodiment of the present disclosure;

FIG. 2 is a top view of FIG. 1 of the present application;

FIG. 3 is a schematic structural view of a subframe reinforcing structure according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a mounting bracket in a subframe reinforcing structure according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a mounting portion in the subframe reinforcing structure according to the embodiment of the present application.

Reference numerals illustrate:

1. a frame rail; 11. a main body section; 12. an extension section; 121. a first mounting hole;

2. a stabilizer bar;

3. a mounting bracket; 31. a first connection portion; 32. a second connecting portion; 321. a second mounting hole; 33. a swing arm connecting part;

4. a mounting part; 41. a mounting base; 42. a bolt fastener; 421. a protrusion.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

In addition, references to orientations or positional relationships indicated by "upper", "lower", "left", "right", "front", "rear", etc. in the embodiments of the present application are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore are not to be construed as limiting the present application. Moreover, relational terms such as "first," "second," and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities or order, nor should it be construed as indicating or implying relative importance; the x-axis in the drawings of the present application represents the longitudinal direction of the vehicle, the y-axis represents the width direction of the vehicle, and the z-axis represents the height direction of the vehicle.

The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the related art, the auxiliary frame is weaker with the vehicle body connection structure, so that the vibration excitation transmission path of the installation point is poor in attenuation, the problem of noise vibration in the vehicle is easily caused, and the current conventional method is to adopt modes of structural increase, size increase, thickness increase and the like to improve the connection strength at the installation point position, so that the weight and the cost are greatly increased.

In view of this, the embodiment of the application provides a subframe reinforcing structure.

Referring to fig. 1-3, a subframe reinforcing structure includes a frame rail 1, the frame rail 1 being connected to a vehicle body; the frame rail 1 comprises a main body section 11; the end part of the main body section 11 extends along the direction approaching the vehicle body to form an extension section 12, the width of the extension section 12 gradually increases from one end approaching the main body section 11 to one end far from the main body section 11, and the end edge of one end of the extension section 12 far from the main body section 11 is arc-shaped; the extension 12 is provided with a first mounting hole 121 for connecting the vehicle body.

Along the length direction of the vehicle, the direction of the vehicle head is taken as the front direction, namely the positive direction of the x axis; along the width direction of the vehicle, the right direction is the positive y-axis direction; the upward direction is the positive z-axis direction along the height direction of the vehicle. Specifically, the frame structure of the subframe is surrounded by front and rear frame rails and left and right frame rails 1, the left and right frame rails 1 are symmetrically arranged about the longitudinal axis of the vehicle, and the rear ends of the frame rails 1 are connected to the vehicle body. The frame rail 1 includes a main body section 11, and an end portion of the main body section 11 extends in a direction approaching the vehicle body, that is, an end portion of the main body section 11 extends rearward to form an extension section 12. The extension section 12 is used as a rear mounting point of the auxiliary frame and is used for being connected with a vehicle body, the extension section 12 is provided with a first mounting hole 121, and the extension section 12 can be connected with a torsion box of the vehicle body in a threaded manner, so that the auxiliary frame is connected with the vehicle body. The width of the extension section 12 gradually increases from the end close to the main body section 11 to the end far away from the main body section 11, a horn-like structure is formed, the edge of the end of the extension section 12 far away from the main body section 11 is arc-shaped, and the stress distribution is more uniform, so that the structural stress concentration can be reduced, the structural bearing capacity is improved, and the structural strength is increased.

In the prior art, in order to improve the connection strength of the auxiliary frame and the vehicle body, the size of the connection part of the frame longitudinal beam and the vehicle body is widened and thickened, so that the material cost is increased, and the weight of the vehicle body is increased. In this application, the extension section 12 is formed by extending the main body section 11 of the frame rail 1 backward, so that the width of one end of the extension section 12 close to the main body section 11 is consistent with that of the main body section 11, the width of the extension section 12 is not increased along the extending direction of the extension section, and the material and weight are not excessively increased, but the structural stress is improved by optimizing the appearance of the extension section 12, and the local structural strength is improved, so that the connection between the auxiliary frame and the vehicle body is enhanced.

Further, the vehicle comprises a stabilizer bar 2, the auxiliary frame comprises a swing arm, and the reinforcing structure further comprises a mounting bracket 3 for mounting the swing arm; the main body section 11 is provided with a mounting part 4, and one side of the mounting bracket 3 and the stabilizer bar 2 are connected to the main body section 11 through the mounting part 4.

Specifically, the main body section 11 of the frame rail 1 is provided with a mounting portion 4, the stabilizer bar 2 is connected to the mounting portion 4, one side of the mounting bracket 3 is also connected to the mounting portion 4, and by providing the mounting portion 4, the stabilizer bar 2 and the mounting bracket 3 are jointly fixed to the same position and connected with the frame rail 1 at the same position, so that the frame rail 1, the stabilizer bar 2 and the mounting bracket 3 form a tight connection structure at the same mounting point, and the connection strength is increased.

In the prior art, a stabilizer bar is connected with a frame longitudinal beam, a mounting bracket is used as a mounting foundation of a swing arm, the purpose of the connection of the swing arm and the frame longitudinal beam is to realize the connection of the swing arm and the frame longitudinal beam, and the mounting position of the stabilizer bar on the frame longitudinal beam is different from the mounting position of the stabilizer bar on the frame longitudinal beam, so that the two mounting positions are required to be fixed by using fastening connectors respectively; the auxiliary frame has the advantages that the original structure of the auxiliary frame is effectively utilized, the mounting positions of the mounting support 3 and the stabilizer bar 2 on the frame longitudinal beam 1 are arranged at the same point position through optimizing the layout between the structures, the connecting strength is increased, one side of the stabilizer bar 2 and one side of the mounting support 3 can be fixed to the frame longitudinal beam 1 only by one mounting part 4, fastening connectors are not required to be arranged at multiple points, and the weight of the whole vehicle is reduced.

Further, the mounting bracket 3 includes a first connection portion 31, a swing arm connection portion 33, and a second connection portion 32 that are sequentially connected, where the first connection portion 31 and the second connection portion 32 are respectively located at two sides of the swing arm connection portion 33; the swing arm connecting part 33 is connected with the swing arm; the first connecting part 31 and the stabilizer bar 2 are connected to the main body section 11 together through the mounting part 4; the second connecting portion 32 is provided with a second mounting hole 321 for connecting the vehicle body.

Specifically, referring to fig. 3, the swing arm connecting portion 33 of the mounting bracket 3 is used for mounting the swing arm, the first connecting portion 31 is used for connecting the main body section 11 of the frame rail 1 and both the first connecting portion 31 and the stabilizer bar 2 are connected to the mounting portion 4, and the second connecting portion 32 is used for connecting the vehicle body. On one hand, the mounting bracket 3 is used as a mounting base of the swing arm, and the strength and the vibration damping capacity of the mounting position of the swing arm are jointly improved by the strength of the frame longitudinal beam 1 and the strength of the vehicle body; on the other hand, the mounting bracket 3 is also used as a rear mounting point of the auxiliary frame and is used for being connected with a vehicle body, the second connecting part 32 of the mounting bracket 3 is provided with a second mounting hole 321, and the mounting bracket 3 and the longitudinal beam of the vehicle body can be connected together in a threaded manner, so that the auxiliary frame and the vehicle body are connected.

In the prior art, the rear mounting points of the auxiliary frame are all positioned at the rear end of the frame longitudinal beam, the span between the two rear mounting points is smaller due to the limited width of the frame longitudinal beam, the contact section with the vehicle body is smaller, and the connection is weaker, although the span can be increased by increasing the width of the rear end of the frame longitudinal beam, the span is limited by the material cost and the weight of the whole vehicle, the increment is not large, and the span of the rear mounting point of the conventional auxiliary frame is generally within 100 mm. The utility model provides a structure of make full use of sub vehicle frame itself to extension 12 is as a rear mounting point of sub vehicle frame, with mounting bracket 3 as another rear mounting point of sub vehicle frame, do not need to increase the width of frame longeron 1 by a wide margin, but just can increase the span of two rear mounting points through the distance between rational control second installation department 4 and extension 12, can reach 180mm, increased the contact cross section with the automobile body, make the sub vehicle frame more firm with the connection structure of automobile body, possess higher torsional characteristics, but also can control material cost and whole car weight well simultaneously.

Further, an included angle exists between the first connecting portion 31 and the second connecting portion 32, and the first connecting portion 31 and the second connecting portion 32 are respectively located in different planes.

Specifically, the first connecting portion 31 and the second connecting portion 32 are respectively located at two sides of the swing arm connecting portion 33, an included angle exists between the first connecting portion 31 and the second connecting portion 32 and are respectively located on different planes, and then the 4 positions of the two side mounting portions of the mounting support 3 form an oblique diagonal structure, so that structural stress distribution is improved, excitation forces are located on different planes when the two sides are stressed, excitation force loading energy of the middle portion of the mounting support 3 can be reduced, meanwhile, the two sides are not located on the same plane when the two sides are subjected to excitation forces, torsion angles are increased due to the fact that the two sides are affected by each other, and force decomposition is reduced. As shown in fig. 4, when the mounting bracket 3 receives an energizing force in the vertical direction, the force is transmitted from one side to the other side of the mounting bracket 3 along the diagonal structure, and the energizing force in the vertical direction is decomposed into two oblique component forces of left and right, so that the decomposition is lowered.

Further, the mounting portion 4 includes a mounting seat 41 and a bolt fastener 42.

The middle part of mount pad 41 is the arch, the arched size with the size adaptation of stabilizer bar 2, the both ends of mount pad 41 have been seted up respectively with the bolt hole of bolt fastener 42 adaptation.

The stabilizer bar 2 is mounted below the mounting seat 41 and is connected to the main body section 11 together with the first connecting portion 31 by the bolt fastener 42.

Specifically, the middle part of the mounting seat 41 is arched, and is adapted to the shape and the size of the stabilizer bar 2, two ends of the mounting seat 41 are respectively provided with a bolt hole, and correspondingly, the main body section 11 and the first connecting part 31 are respectively provided with a bolt hole matched with the main body section 11. During installation, the first connecting portion 31 is placed on the main body section 11, the stabilizer bar 2 is placed above the first connecting portion 31, the mounting seat 41 is pressed on the stabilizer bar 2, so that the stabilizer bar 2 passes through an arch area in the middle of the mounting seat 41 and is pressed between the mounting seat 41 and the first connecting portion 31, and the mounting seat 41, the stabilizer bar 2 and the first connecting portion 31 are locked and fixed with the main body section 11 by using the same set of bolt fasteners 42, so that the stabilizer bar 2 and the mounting bracket 3 are jointly fixed to the same position on the frame longitudinal beam 1, a fastening connector is not required to be arranged at multiple points, and cost and weight are reduced.

Further, the bolt fastener 42 includes a bolt and a nut, and the edge of the nut is provided with a plurality of protrusions 421, and the plurality of protrusions 421 are spaced around the outer circumference of the nut.

Referring to fig. 5, a plurality of protrusions 421 are provided on the outer circumference of the nut, which is advantageous in increasing the contact area between the nut and the mounting seat 41 during locking, thereby reinforcing the connection and ensuring the stable connection. The shape of the protrusions 421 can be triangle, trapezoid, rectangle or any other suitable shape, and the size and number of the protrusions 421 can be flexibly adjusted according to practical requirements. As an example, four protrusions 421 may be provided, and four protrusions 421 are uniformly distributed around the outer circumference of the nut, so that the tightening effect is improved while the contact area is increased.

According to the auxiliary frame reinforcing structure, the structure of the auxiliary frame is fully utilized, and the local rigidity is improved by optimizing the structural shape and the layout, so that the connection strength of the auxiliary frame and a vehicle body is increased, the vibration transmission sensitivity is reduced, structural support is provided for the construction of a quiet and comfortable space of the whole vehicle, and the cost and the weight can be effectively controlled; under the working condition of violent driving, the risk of local tearing can be avoided, the durable safety of the vehicle is improved, the stability of operation can be improved when the operation is carried out, and a good structural design foundation is laid for building high-end comfortable hybrid motor vehicles.

The application also provides a subframe, comprising the subframe reinforcing structure.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but rather is intended to cover any and all modifications, equivalents, alternatives, and improvements within the spirit and principles of the present application.

Claims

1. The utility model provides a sub vehicle frame additional strengthening, includes frame longeron (1), frame longeron (1) are connected its characterized in that with the automobile body:

the frame rail (1) comprises a main body section (11);

the end part of the main body section (11) extends along the direction approaching the vehicle body to form an extension section (12), the width of the extension section (12) gradually increases from one end approaching the main body section (11) to one end far away from the main body section (11), and the end edge of one end of the extension section (12) far away from the main body section (11) is arc-shaped;

the extension section (12) is provided with a first mounting hole (121) for connecting the vehicle body.

2. The subframe reinforcing structure as claimed in claim 1, wherein: the reinforcing structure is used for connecting a subframe of a vehicle with a vehicle body, the vehicle comprises a stabilizer bar (2), the subframe comprises a swing arm, and the reinforcing structure further comprises a mounting bracket (3) for mounting the swing arm; the main body section (11) is provided with a mounting part (4), and one side of the mounting bracket (3) and the stabilizer bar (2) are connected to the main body section (11) through the mounting part (4).

3. The subframe reinforcing structure as claimed in claim 2, wherein: the mounting bracket (3) comprises a first connecting part (31), a swing arm connecting part (33) and a second connecting part (32) which are sequentially connected, wherein the first connecting part (31) and the second connecting part (32) are respectively positioned at two sides of the swing arm connecting part (33);

the swing arm connecting part (33) is connected with the swing arm;

the first connecting part (31) and the stabilizer bar (2) are connected to the main body section (11) through the mounting part (4);

the second connecting part (32) is provided with a second mounting hole (321) for connecting the vehicle body.

4. A subframe reinforcing structure as claimed in claim 3, wherein: an included angle exists between the first connecting part (31) and the second connecting part (32), and the first connecting part (31) and the second connecting part (32) are respectively located on different planes.

5. A subframe reinforcing structure as claimed in claim 3, wherein: the mounting part (4) comprises a mounting seat (41) and a bolt fastener (42);

the middle part of the mounting seat (41) is arched, the size of the arch is matched with the size of the stabilizer bar (2), and bolt holes matched with the bolt fasteners (42) are respectively formed at two ends of the mounting seat (41);

the stabilizer bar (2) is mounted below the mounting seat (41) and is connected to the main body section (11) together with the first connecting portion (31) by the bolt fastener (42).

6. The subframe reinforcing structure as claimed in claim 5, wherein: the bolt fastener (42) comprises a bolt and a nut, wherein a plurality of protrusions (421) are arranged on the edge of the nut, and the protrusions (421) are distributed at intervals around the periphery of the nut.

7. The subframe reinforcing structure as claimed in claim 6, wherein: the protrusions (421) are provided with four, and the four protrusions (421) are uniformly distributed around the outer circumference of the nut.

8. A subframe reinforcing structure as claimed in claim 3, wherein: the extension section (12) is in threaded connection with the vehicle body, and the second connecting portion (32) is in threaded connection with the vehicle body.

9. A subframe comprising the subframe reinforcing structure of any one of claims 1-8.

10. A vehicle comprising the subframe reinforcing structure as claimed in any one of claims 1 to 8 or comprising the subframe as claimed in claim 9.