Frame longitudinal beam structure, auxiliary frame assembly and vehicle

Abstract

The utility model discloses a frame longitudinal beam structure, subframe subassembly and vehicle, said frame longitudinal beam structure includes: frame longitudinal beam, at least part of frame longitudinal beam is constructed to be inclined section, inclined section is constructed to extend outwards from back to front, inclined section is constructed to be inclined section, and the frame longitudinal beam is constructed to be inclined section. The installation support is connected to the inclined section, an installation cavity with multiple closed sides is formed in the installation support, the installation cavity is provided with a penetrating opening which is open towards the outer side of the frame longitudinal beam, and the penetrating opening is used for installing the front end of the inner side of the lower swing arm. According to the vehicle frame longitudinal beam structure, the installation support is connected to the inclined section of the vehicle frame longitudinal beam, the flexural rigidity of the installation support can be improved, the installation support is provided with the penetrating opening used for installing the lower swing arm, the lower swing arm can be assembled or separated at the penetrating opening, damage to structures such as the lower swing arm caused by impact force during collision can be reduced, and the service life of the vehicle frame longitudinal beam structure is prolonged. Therefore, the vehicle collision performance is improved, and a driver and passengers are protected to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a longitudinal beam structure of a vehicle frame, a subframe assembly with the longitudinal beam structure of the vehicle frame, and a vehicle with the subframe assembly. Background Art

[0002] At present, the automotive industry is in an era of accelerating transformation. In particular, the Chinese automotive industry is developing rapidly, and the competition is becoming increasingly fierce. The trend of new energy vehicles is constantly moving forward. At the same time, the demand for automotive technology, intelligence, and safety is increasing. Especially, people attach more importance to safety. Therefore, automotive safety is not only the bottom line of automotive manufacturers but also a respect for life. From traditional fuel vehicles to mild hybrid vehicles, plug-in hybrid vehicles, and pure electric vehicles, automotive safety has always been a topic of concern. Whether it is passive safety that has always adhered to its essence or the increasingly innovative active safety performance, the goal is to protect personal safety to the greatest extent and reduce property losses.

[0003] Automotive passive safety includes various situations such as frontal collision and offset collision. Most users encounter the small offset collision scenario more often. The existing subframe assembly cannot achieve a good impact dissipation effect inside, which will cause damage to important structures such as the lower control arm, increase the maintenance cost and risk, and there is room for improvement. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a longitudinal beam structure of a vehicle frame, which can realize the assembly or separation of the lower control arm at the through-hole, reduce the damage of the impact force to structures such as the lower control arm during a collision, thereby improving the vehicle collision performance and protecting the passengers and drivers to the greatest extent.

[0005] According to an embodiment of the utility model, the longitudinal beam structure of the vehicle frame includes: a vehicle frame longitudinal beam, at least part of which is configured as an inclined section, and the inclined section is configured to extend obliquely outward from the rear to the front; a mounting bracket, which is connected to the inclined section, and the mounting bracket forms a mounting cavity with multiple closed sides. The mounting cavity has a through-hole that is open to the outside of the vehicle frame longitudinal beam, and the through-hole is used to mount the inner front end of the lower control arm.

[0006] According to the longitudinal beam structure of the vehicle frame of the embodiment of the utility model, by setting the mounting bracket to be connected to the inclined section of the vehicle frame longitudinal beam, the bending stiffness of the mounting bracket can be improved, and a through-hole for mounting the lower control arm is provided on the mounting bracket, so that the lower control arm can be assembled or separated at the through-hole, the damage of the impact force to structures such as the lower control arm during a collision can be reduced, thereby improving the vehicle collision performance and protecting the passengers and drivers to the greatest extent.

[0007] According to the longitudinal beam structure of the frame according to some embodiments of the present invention, the mounting bracket includes a front side plate, an intermediate connecting plate, and a rear side plate. The front side plate and the rear side plate are oppositely distributed and connected to the front and rear ends of the intermediate connecting plate to jointly define the mounting cavity. The through hole is formed between the front side plate and the rear side plate and is oppositely distributed along the transverse direction of the vehicle with the intermediate connecting plate. The front side plate and / or the rear side plate are connected to the inclined section.

[0008] According to the longitudinal beam structure of the frame according to some embodiments of the present invention, a hollow cavity is formed inside the longitudinal beam of the frame. The mounting bracket is located inside the hollow cavity. The longitudinal beam of the frame includes an inner side wall, a top wall, an outer side wall, and a bottom wall that are connected in sequence. The inner side wall and the outer side wall are oppositely distributed along the inner and outer directions, and the top wall and the bottom wall are oppositely distributed along the up and down directions;

[0009] Wherein, the front side plate and / or the rear side plate are connected to the top wall and / or the bottom wall through a bracket mounting member.

[0010] According to the longitudinal beam structure of the frame according to some embodiments of the present invention, the front side plate and / or the rear side plate are formed with connecting studs. The connecting studs are formed with connecting holes. The bracket mounting member passes through the top wall, the connecting hole, and the bottom wall in sequence.

[0011] According to the longitudinal beam structure of the frame according to some embodiments of the present invention, the longitudinal beam of the frame includes a front beam section and a rear beam section. The front beam section is configured as the inclined section. The rear beam section extends in the front-rear direction. The mounting bracket is mounted on the front beam section. The rear beam section is adapted to be movably connected to the inner rear end of the lower swing arm.

[0012] The present invention also proposes a subframe assembly.

[0013] According to the subframe assembly of the embodiments of the present invention, it includes a lower swing arm and the longitudinal beam structure of the frame in any one of the above embodiments. An installation portion is provided at the inner front end of the lower swing arm. The installation portion is adapted to extend from the through hole to the installation cavity to be movably connected to the installation bracket through a breakable connecting member. The breakable connecting member passes through the installation cavity. The inner rear end of the lower swing arm is movably connected to the longitudinal beam of the frame. The outer side of the lower swing arm is adapted to be relatively fixed to the wheel. The installation bracket is adapted to act on the breakable connecting member during a collision and cause the breakable connecting member to break.

[0014] According to some embodiments of the subframe assembly of the present invention, the breakable connecting member is configured as a connecting bolt, and the installation portion is configured as an installation sleeve. The installation sleeve is sleeved outside the connecting bolt.

[0015] According to some embodiments of the present utility model, for the subframe assembly, one of the front side plate or the rear side plate of the mounting bracket is provided with a mating sunk groove, the connecting bolt penetrates through the mounting bracket in the front-rear direction, and the connecting bolt is connected to a connecting nut at the mating sunk groove.

[0016] According to some embodiments of the present utility model, for the subframe assembly, the mounting bracket is detachably connected to the inclined section through a bracket mounting member;

[0017] Wherein, the breakable connecting member is configured as a connecting bolt, the bracket mounting member is configured as a mounting bolt, and the shear strength of the mounting bolt is greater than the shear strength of the connecting bolt

[0018] According to some embodiments of the present utility model, for the subframe assembly, there are two longitudinal frame beams of the vehicle frame, and a front cross beam, a middle cross beam and a rear cross beam are connected between the two longitudinal frame beams, and the front cross beam, the middle cross beam and the rear cross beam are spaced apart in the front-rear direction;

[0019] The front end of the longitudinal frame beam of the vehicle frame is connected to the end of the front cross beam, the middle part of the longitudinal frame beam of the vehicle frame is connected to the end of the middle cross beam, and the rear end of the longitudinal frame beam of the vehicle frame is connected to the end of the rear cross beam.

[0020] The present utility model also provides a vehicle.

[0021] According to the vehicle of the embodiments of the present utility model, it includes the subframe assembly of any one of the above embodiments.

[0022] The advantages of the vehicle and the above-mentioned longitudinal frame beam structure and subframe assembly of the vehicle frame over the prior art are the same, and will not be elaborated here.

[0023] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a partial exploded view of the subframe assembly at the mounting bracket and the lower control arm according to the embodiments of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the mounting bracket of the longitudinal frame beam of the vehicle frame according to the embodiments of the present utility model.

[0027] Reference numerals:

[0028] Subframe assembly 100, Longitudinal frame beam structure 101,

[0029] The longitudinal frame beam 1, the hollow cavity 11, the inner side wall 12, the top wall 13, the second mounting hole 131, the outer side wall 14, the bottom wall 15, the front beam section 16, the rear beam section 17, the mounting bracket 2, the mounting cavity 21, the through hole 211, the front side plate 22, the connecting convex column 221, the connecting hole 2211, the first mounting hole 222, the middle connecting plate 23, the rear side plate 24, the mating sunk groove 241, the lower swing arm 3, the mounting portion 31, the first connecting hole 311, the connecting shaft 32, the frangible connecting member 4, the bracket mounting member 5, the connecting nut 6, the front cross beam 71, the middle cross beam 72, and the rear cross beam 73. Specific embodiments

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounting", "connecting", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the transverse direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0034] The following is a reference to Figure 1 - Figure 2 Describe the longitudinal frame beam structure 101 according to an embodiment of the present invention. By arranging the mounting bracket 2 to be connected to the inclined section of the longitudinal frame beam 1, the bending stiffness of the mounting bracket 2 can be improved, and a through-hole 211 for mounting the lower swing arm 3 is provided on the mounting bracket 2, so that the lower swing arm 3 can be assembled or separated at the through-hole 211, which can reduce the damage to structures such as the lower swing arm 3 caused by the impact force during a collision, thereby improving the vehicle collision performance and protecting the passengers and drivers to the greatest extent.

[0035] As Figure 1 - Figure 2 shown, a subframe assembly 100 according to an embodiment of the present invention includes: a longitudinal frame beam 1 and a mounting bracket 2.

[0036] At least part of the longitudinal frame beam 1 is configured as an inclined section, and the inclined section is configured to extend obliquely outward from the rear to the front. Among them, the longitudinal frame beam 1 can be configured as a partial inclined section or the entire inclined section, and the inclined section extends obliquely outward from the rear to the front in the vehicle longitudinal direction. When two longitudinal frame beams 1 are simultaneously configured as inclined sections, a flared shape can be formed between the two longitudinal frame beams 1, that is, an outwardly flared shape at a certain angle. The longitudinally frame beams 1 distributed in a flared shape can provide a more spacious internal space for the vehicle, especially at the front of the vehicle. The outwardly inclined design can increase the bending stiffness of the longitudinal frame beam 1 and better improve the handling stability of the vehicle.

[0037] Moreover, by optimizing the inclination angle and flared width of the longitudinal frame beam 1 and utilizing the best mechanical properties, it helps to more evenly distribute the weight and load of the vehicle, reduce local stress. In this way, during a collision, the flared longitudinal frame beam 1 can provide better energy absorption and dispersion to protect the safety of passengers. And the setting method of the longitudinal frame beam 1 is diverse and can be flexibly selected according to the actual mechanical properties.

[0038] The mounting bracket 2 is connected to the inclined section, that is, the inclined section of the longitudinal frame beam 1 is used to mount the mounting bracket 2, and the mounting bracket 2 can be connected to the inside of the inclined section. The two can be detachably connected by fasteners such as bolts. In this way, the bending strength at the mounting bracket 2 can be improved, and the mounting bracket 2 forms a mounting cavity 21 that is closed on multiple sides. That is to say, the mounting cavity 21 is closed in multiple directions. The multi-sided closure of the mounting cavity 21 can provide better structural stability and ensure the stability of the component during the installation process and use process.

[0039] The installation cavity 21 has a through-opening 211 that opens towards the outer side of the vehicle frame longitudinal beam 1. Here, the inner and outer directions are along the transverse direction of the vehicle, i.e., the Y-direction, with the inner being the direction close to the vehicle center line and the outer being the direction away from the vehicle center line. That is, the installation cavity 21 opens in the direction away from the vehicle center line and is closed in the direction close to the vehicle center line. Moreover, the structural strength at the through-opening 211 is small, and the strength in the inner direction of the through-opening 211 is large, which can ensure the structural strength of the mounting bracket 2. Among them, the through-opening 211 can be constructed as a square structure.

[0040] Among them, in actual design, the installation cavity 21 can be open in at least one direction, and one of the open sides is towards the outer side of the vehicle frame longitudinal beam 1. That is to say, the installation cavity 21 can be open on the upper side, lower side, and outer side, and its setting method is diverse, and it can be flexibly set on the premise of ensuring the structural strength of the mounting bracket 2.

[0041] The through-opening 211 is used to install the inner front end of the lower swing arm 3. For example, the inner front end of the lower swing arm 3 is extended from the outer open area to the through-opening 211 and is detachably connected to the mounting bracket 2 through fasteners such as bolts, which can realize the connection and fixation between the lower swing arm 3 and the mounting bracket 2. Moreover, the mounting bracket 2 is connected to the inclined section of the vehicle frame longitudinal beam 1, so that the lower swing arm 3 can be connected to the vehicle frame longitudinal beam 1 through the mounting bracket 2, and the connection method is simple and reliable.

[0042] Thus, by providing the through-opening 211 that opens outwards on the mounting bracket 2, the installation of the lower swing arm 3 is realized, and during the operation of the vehicle, the movement gap between the lower swing arm 3 and the mounting bracket 2 can be avoided. When the vehicle is subjected to a large impact, the impact force is transmitted through the vehicle frame longitudinal beam 1, and the mounting bracket 2 can break, so that the lower swing arm 3 can be separated from the mounting bracket 2 at the through-opening 211, which can prevent more serious damage to other structures such as the lower swing arm 3 caused by force transmission. Moreover, the mounting bracket 2 is a multi-sided closed structure with high structural strength, which can avoid the abnormal separation of the lower swing arm 3 from the vehicle frame longitudinal beam 1 and has higher safety.

[0043] According to the vehicle frame longitudinal beam structure 101 of the embodiment of the present invention, by connecting the mounting bracket 2 to the inclined section of the vehicle frame longitudinal beam 1, the bending stiffness of the mounting bracket 2 can be improved, and a through-opening 211 for installing the lower swing arm 3 is provided on the mounting bracket 2, which can realize the assembly or separation of the lower swing arm 3 at the through-opening 211, reduce the damage to structures such as the lower swing arm 3 caused by the impact force during collision, improve the vehicle collision performance, and protect the driver and passengers to the greatest extent.

[0044] In some embodiments, the mounting bracket 2 includes a front side plate 22, an intermediate connecting plate 23, and a rear side plate 24. The front side plate 22 and the rear side plate 24 are distributed oppositely and connected to the front and rear ends of the intermediate connecting plate 23 to jointly define a mounting cavity 21. A through hole 211 is formed between the front side plate 22 and the rear side plate 24 and is distributed transversely relative to the intermediate connecting plate 23 along the vehicle. The front side plate 22 and / or the rear side plate 24 is connected to the inclined section.

[0045] Specifically, the mounting bracket 2 includes three main body structures, namely, a front side plate 22, an intermediate connecting plate 23, and a rear side plate 24, and the three are bent and connected in sequence. The bending angle can be a right angle. Among them, the front side plate 22 and the rear side plate 24 extend transversely, the intermediate connecting plate 23 extends longitudinally, and the front side plate 22 and the rear side plate 24 are both located on the same side of the intermediate connecting plate 23. As Figure 2 shown, the front side plate 22 and the rear side plate 24 can both be located outside the intermediate connecting plate 23. In this way, the front side, inner side, and rear side of the mounting bracket 2 can be closed ends. The front side plate 22, the intermediate connecting plate 23, and the rear side plate 24 jointly define a mounting cavity 21 with a through hole 211. In the transverse direction of the vehicle, the through hole 211 is distributed oppositely to the intermediate connecting plate 23. Among them, the upper side and the lower side of the mounting cavity 21 are both open sides. The structure of the mounting bracket 2 is simple and convenient to process.

[0046] The front side plate 22 and / or the rear side plate 24 is connected to the inclined section, that is, one of the front side plate 22 and the rear side plate 24 can be connected to the inclined section, or both the front side plate 22 and the rear side plate 24 are connected to the inclined section. Both of these setting methods can realize the connection and fixation of the mounting bracket 2 to the vehicle frame longitudinal beam 1, and the front side plate 22 and the rear side plate 24 can be detachably connected to the inclined section through fasteners such as bolts. The assembly process is simple and convenient.

[0047] In actual design, the mounting bracket 2 can be constructed as a C-shaped structure, and the opening direction of the through hole 211 of the mounting bracket 2 is perpendicular to the rotation axis of the lower swing arm 3, which can form an avoidance gap at the through hole 211 to realize the up and down swing of the lower swing arm 3 around its rotation axis.

[0048] In some embodiments, a hollow cavity 11 is formed in the vehicle frame longitudinal beam 1. The hollow cavity 11 extends along the direction of the vehicle frame longitudinal beam 1. Among them, the hollow cavity 11 is a cavity body structure, which can realize the absorption and buffering of impact energy, and can reduce the weight of the vehicle frame longitudinal beam 1 to meet the design requirements of vehicle lightweighting.

[0049] The mounting bracket 2 is located in the hollow cavity 11. The vehicle frame longitudinal beam 1 includes an inner side wall 12, a top wall 13, an outer side wall 14, and a bottom wall 15 connected in sequence. The inner side wall 12 and the outer side wall 14 are distributed oppositely in the inner and outer directions, and the top wall 13 and the bottom wall 15 are distributed oppositely in the up and down directions.

[0050] Specifically, the interior of the hollow cavity 11 is a cavity body, which can be used for installing the mounting bracket 2. The longitudinal beam 1 of the vehicle frame includes an inner side wall 12, a top wall 13, an outer side wall 14, and a bottom wall 15, which are connected in sequence. They can be connected by forms such as welding, or integrally formed. Among them, the inner side wall 12 is located inside the outer side wall 14 and they are distributed relatively. The top wall 13 is located above the bottom wall 15 and they are distributed relatively. In this way, the inner side wall 12, the top wall 13, the outer side wall 14, and the bottom wall 15 together form the hollow cavity 11. Thus, by installing the mounting bracket 2 in the hollow cavity 11, the mounting part 31 of the mounting bracket 2 and the lower swing arm 3 can be hidden inside the longitudinal beam 1 of the vehicle frame, saving the installation space of the two structures, preventing the outside of the longitudinal beam 1 of the vehicle frame from being occupied, and providing more space for the installation of other structures.

[0051] Among them, the front side plate 22 and / or the rear side plate 24 are connected to the top wall 13 and / or the bottom wall 15 through the bracket mounting member 5, that is, the front side plate 22 can be connected to the top wall 13 or the bottom wall 15 through the bracket mounting member 5 and be connected to the top wall 13 or the bottom wall 15 at the same time. The rear side plate 24 can be connected to the top wall 13 or the bottom wall 15 through the bracket mounting member 5 and be connected to the top wall 13 or the bottom wall 15 at the same time.

[0052] Specifically, the front side plate 22 and the rear side plate 24 are both connected to the longitudinal beam 1 of the vehicle frame in the same way, such as Figure 1 shown, the front side plate 22 and the rear side plate 24 are both connected to the top wall 13 and the bottom wall 15 through the bracket mounting member 5. Among them, the bracket mounting member 5 connects the front side plate 22 and the rear side plate 24 to the top wall 13 and the bottom wall 15 vertically. By connecting the front side plate 22 and the rear side plate 24 to the longitudinal beam 1 of the vehicle frame, the connection strength between the mounting bracket 2 and the longitudinal beam 1 of the vehicle frame can be ensured, and the vertical connection is simple and convenient.

[0053] In some embodiments, the front side plate 22 and / or the rear side plate 24 are formed with connection convex columns 221, and the connection convex columns 221 are formed with connection holes 2211. The bracket mounting member 5 sequentially passes through the top wall 13, the connection hole 2211, and the bottom wall 15.

[0054] Specifically, such as Figure 2As shown, both the front side plate 22 and the rear side plate 24 are provided with connecting convex columns 221. The connecting convex column 221 of the front side plate 22 can be located on the outer side of the front side plate 22, and the connecting convex column 221 protrudes towards the front side of the front side plate 22 to avoid interference with the outer side wall 14 of the vehicle frame longitudinal beam 1. And the connecting convex column 211 extends vertically. The connecting convex column 221 of the rear side plate 24 can be located on the inner side of the rear side plate 24, and the connecting convex column 221 protrudes rearward, and the connecting convex column 211 extends vertically. And both of the two connecting convex columns 221 are provided with connecting holes 2211. The connecting holes 2211 extend vertically and penetrate through the upper and lower ends of the connecting convex column 221. And both the top wall 13 and the bottom wall 15 are provided with second mounting holes 131. The two second mounting holes 131 can both be configured as round holes, and a nut is welded at another round hole, or one of them is configured as a round hole and the other is configured as a threaded hole. In this way, the mounting bracket 2 is first connected to the lower swing arm 3, and then the mounting bracket 2 is extended into the hollow cavity 11. And after the second mounting hole 131 is aligned with the connecting hole 2211, the bracket mounting member 5 is sequentially inserted from top to bottom or from bottom to top through the second mounting hole 131 of the top wall 13 or the bottom wall 15, the connecting hole 2211, and the second mounting hole 131 of the bottom wall 15 or the top wall 13, so as to realize the connection and fixation of the front side plate 22 and the rear side plate 24 with the top wall 13 and the bottom wall 15. The connection method is simple and convenient for disassembly and assembly.

[0055] Therefore, the two connecting convex columns 221 are arranged diagonally to ensure that the mounting bracket 2 is stressed evenly and symmetrically, improve the connection strength between the mounting bracket 2 and the vehicle frame longitudinal beam 1, and improve the impact resistance of the mounting bracket 2.

[0056] Among them, the setting method of the connecting convex column 221 is not limited to that described in this embodiment, and the connection method between the connecting plate and the rear side plate 24 and the vehicle frame longitudinal beam 1 is also not limited to that described in this embodiment, and can be flexibly set according to actual design requirements.

[0057] In some embodiments, the vehicle frame longitudinal beam 1 includes a front beam section 16 and a rear beam section 17. The front beam section 16 is configured as an inclined section, the rear beam section 17 extends in the front-rear direction, the mounting bracket 2 is mounted on the front beam section 16, and the rear beam section 17 is adapted to be movably connected to the inner rear end of the lower swing arm 3.

[0058] Specifically, as Figure 1As shown, the front beam section 16 is connected to the front side of the rear beam section 17. The front beam section 16 is an inclined section and extends obliquely outward from the rear to the front. The rear beam section 17 is a straight section and extends in the front-rear direction. Among them, the mounting bracket 2 is installed on the front beam section 16. That is, the lower swing arm 3 can be connected to the front beam section 16 through the mounting bracket 2, and the inner rear end of the lower swing arm 3 is connected to the rear beam section 17. Specifically, a connecting shaft 32 is provided at the inner rear end of the lower swing arm 3. The connecting shaft 32 extends in the front-rear direction, and a connecting portion is provided on the rear beam section 17. The connecting portion is provided with a mounting hole extending in the front-rear direction. Inserting the connecting portion into the mounting hole can achieve the movable connection between the connecting portion and the rear beam section 17, and its movable manner can be rotation, that is, the connecting portion can rotate relative to the mounting hole.

[0059] Thus, the inner front end of the lower swing arm 3 is movably connected to the front beam section 16, and the inner rear end of the lower swing arm 3 is movably connected to the rear beam section 17, which can enable the lower swing arm 3 to achieve two movable connections with the vehicle frame longitudinal beam 1. Moreover, the outer side of the lower swing arm 3 is relatively fixed to the wheel. In this way, the lower swing arm 3 can form a triangular structure, improving the structural stability at the lower swing arm 3, enabling the lower swing arm 3 to have force transmission paths in multiple directions. And when the vehicle is driving on a turning or uneven road surface, the suspension system such as the lower swing arm 3 can better absorb shocks and adjust the vehicle's posture, improving the vehicle's handling performance and comfort, and reducing the stress transmission between the lower swing arm 3 and the vehicle frame longitudinal beam 1, extending the service life of the lower swing arm 3.

[0060] The present utility model also proposes a subframe assembly 100.

[0061] According to the subframe assembly 100 of the embodiment of the present utility model, it includes a lower swing arm 3 and the vehicle frame longitudinal beam structure 101 of any one of the above embodiments. An installation portion 31 is provided at the inner front end of the lower swing arm 3. The installation portion 31 is adapted to extend from the through hole 211 into the installation cavity 21 to be movably connected to the mounting bracket 2 through a breakable connecting member 4. The breakable connecting member 4 is disposed in the installation cavity 21. That is to say, the installation portion 31 is connected to the mounting bracket 2 through the breakable connecting member 4, and the installation portion 31 and the mounting bracket 2 can move relative to each other, and its movable manner can be rotation, movement, etc.

[0062] Specifically, as Figure 1As shown, the installation part 31 can be configured as a circular or square structure. The contour size of the installation part 31 is smaller than the cavity size of the installation cavity 21, and the size of the penetration opening 211 is larger than the contour size of the installation part 31, which is conducive to the installation part 31 being accommodated in the installation cavity 21, and the installation part 31 extends in the front-back direction. Among them, during installation, the installation part 31 is extended from the outer penetration opening 211 into the installation cavity 21, and the breakable connecting member 4 is penetrated through the installation cavity 21 and the installation part 31 in the front-back direction, so that the installation part 31 can be connected to the installation bracket 2, realizing the connection between the lower swing arm 3 and the installation bracket 2, and the installation bracket 2 is connected to the inclined section of the vehicle frame longitudinal beam 1, so that the lower swing arm 3 can be connected to the vehicle frame longitudinal beam 1. Its connection method is simple and the installation is convenient.

[0063] And the inner rear end of the lower swing arm 3 is movably connected to the vehicle frame longitudinal beam 1, and the two can be detachably connected by fasteners such as bolts. Its movement mode can be rotation, movement, etc. The outer side of the lower swing arm 3 is adapted to be fixedly connected to the wheel relatively, that is, the outer side of the lower swing arm 3 can be fixedly connected to the wheel, and the two move synchronously.

[0064] Specifically, the lower swing arm 3 is an important part of the suspension system. The two ends of the lower swing arm 3 are respectively connected to the wheel and the vehicle frame longitudinal beam 1, playing the role of supporting the wheel, transmitting force and positioning the wheel. Among them, the inner rear end of the lower swing arm 3 is connected to the rear end of the vehicle frame longitudinal beam 1, and the outer side of the lower swing arm 3 is fixedly connected to the wheel relatively, and the inner front end of the lower swing arm 3 is connected to the vehicle frame longitudinal beam 1. In this way, when the wheel and the lower swing arm 3 move, the inner side of the lower swing arm 3 can move relative to the vehicle frame longitudinal beam 1 and transmit the force to the vehicle frame longitudinal beam 1, so that during vehicle driving, the up-and-down movement and positioning of the wheel can be realized according to different road surface conditions.

[0065] Among them, the installation bracket 2 is adapted to act on the breakable connecting member 4 during a collision and cause the breakable connecting member 4 to break. That is to say, during a vehicle collision, when the installation bracket 2 acts on the breakable connecting member 4, and when the force generated by the installation bracket 2 on the breakable connecting member 4 is greater than the set value of the breakable connecting member 4, the breakable connecting member 4 will break.

[0066] Among them, it should be noted that the collisions of the vehicle include frontal collisions and offset collisions, etc. Among them, the frontal collision can be a collision from directly in front of the vehicle's traveling direction, and the offset collision can be a collision from the left front or right front of the vehicle's traveling direction. The breakable connecting member 4 in the present invention can break during both frontal collisions and offset collisions, and can effectively swing the lower control arm 3 outward, avoiding the wheels connected to the lower control arm 3 from invading the passenger compartment and posing a safety hazard to the occupants. Especially during offset collisions, the extension direction of the inclined section of the longitudinal frame beam 1 has a smaller included angle with the acting direction of the offset collision force, so that the collision force on the inclined section acts on the breakable connecting member 4 and makes the breakable connecting member 4 more likely to break, which is beneficial to improving the occupant safety during offset collisions.

[0067] Thus, through the breakable characteristic of the breakable connecting member 4, when the force received by the breakable connecting member 4 is greater than its set value after the vehicle is subjected to a large impact, the breakable connecting member 4 releases part of the impact force by breaking, which can prevent more serious damage to other structures such as the lower control arm 3 caused by force transmission. Moreover, the multiple side walls of the installation cavity 21 can protect the breakable connecting member 4, ensure the installation strength of the breakable connecting member 4, and avoid the occurrence of abnormal breakage of the breakable connecting member 4, so that it cannot meet the preset breakage requirements. The structural performance is better and the safety is higher. And after the breakable connecting member 4 breaks, it can protect the safety of other structures, reduce the maintenance cost, thereby improving the vehicle collision safety strategy and protecting the drivers and passengers to the greatest extent.

[0068] In some embodiments, the breakable connecting member 4 is configured as a connecting bolt, and the installation portion 31 is configured as an installation sleeve. The installation sleeve is sleeved outside the connecting bolt, so that the installation sleeve can be coaxially connected to the connecting bolt, and the installation sleeve can rotate around the axis of the connecting bolt or move along the axis.

[0069] Specifically, as Figure 1 and Figure 2As shown, the installation sleeve is provided with a first connection hole 311. The first connection hole 311 extends along the axial direction of the installation sleeve and penetrates through both axial ends of the installation sleeve. The first connection hole 311 can be configured as a circular hole. The front side plate 22 and the rear side plate 24 of the installation bracket 2 are both provided with first installation holes 222. The two first installation holes 222 are concentrically arranged. The two first installation holes 222 can both be configured as circular holes. In this way, when the installation sleeve extends into the installation cavity 21 and the first connection hole 311 is aligned with the two first installation holes 222, the connecting bolts are sequentially penetrated through the first installation hole 222 of the front side plate 22, the first connection hole 311, and the first installation hole 222 of the rear side plate 24, connecting the installation sleeve between the front side plate 22 and the rear side plate 24, and the installation sleeve is sleeved outside the connecting bolts, which can increase the axial matching dimension between the two, making the movement of the installation sleeve and the connecting bolts more reliable. Its connection method is simple and the installation is convenient. Moreover, the installation direction of the connecting bolts can also be from back to front, and the connection methods are diverse.

[0070] In some embodiments, in the vehicle's inside-outside direction, the length of one of the front side plate 22 and the rear side plate 24 is greater than the length of the other. That is to say, the length of the front side plate 22 can be greater than the length of the rear side plate 24, or the length of the rear side plate 24 can be greater than the length of the front side plate 22, which can be selectively set according to actual needs and space size.

[0071] One of the front side plate 22 or the rear side plate 24 of the installation bracket 2 is provided with a mating sunk groove 241. The connecting bolts penetrate through the installation bracket 2 in the front-back direction, and the connecting bolts are connected to the connecting nuts 6 at the mating sunk groove 241.

[0072] That is to say, the mating sunk groove 241 can be set on the front side plate 22, or can be set on the rear side plate 24, and the mating sunk groove 241 can also be set on both the front side plate 22 and the rear side plate 24. The setting methods are diverse and can be flexibly selected.

[0073] Specifically, as Figure 2 shown, both the front side plate 22 and the rear side plate 24 extend along the vehicle's transverse direction, and the extension length of the front side plate 22 is greater than the extension length of the rear side plate 24. In this way, the installation bracket 2 can be installed in the inclined section, ensuring that there is enough installation space for the front side plate 22 and the rear side plate 24, and avoiding interference with the internal structure of the inclined section of the vehicle frame longitudinal beam 1, resulting in a situation where installation is impossible.

[0074] In this embodiment, a mating sunk groove 241 is provided on the rear side plate 241, and the mating sunk groove 241 is provided on the side of the rear side plate 24 facing away from the front side plate 22, that is, the mating sunk groove 241 is provided on the rear side of the rear side plate 24. The mating sunk groove 241 can be configured as a circular groove, a square groove, etc., and the side of the mating sunk groove 241 facing the front side plate 22 is recessed. In this way, when installing the installation part 31, the breakable connecting member 4 is sequentially inserted through the front side plate 22, the installation part 31 and the rear side plate 24 in the front-rear direction, and then the connecting nut 6 is attached to the mating sunk groove 241 and threadedly connected to the connecting bolt, which can ensure reliable connection between the two and improve the connection strength between the installation part 31 and the installation bracket 2.

[0075] In some embodiments, the installation bracket 2 is detachably connected to the inclined section through the bracket mounting member 5. Among them, there are two bracket mounting members 5, and the two bracket mounting members 5 connect the installation bracket 2 to the inclined section of the vehicle frame longitudinal beam 1, which can ensure the connection strength between the installation bracket 2 and the vehicle frame longitudinal beam 1. And the installation bracket 2 is connected to the lower swing arm 3 through the breakable connecting member 4, that is, the lower swing arm 3 is connected to the inclined section of the vehicle frame longitudinal beam 1 through the installation bracket 2. In this way, after the vehicle collides, especially in an offset collision, the inclined section can withstand the collision impact force, that is, the anti-impact ability at the installation bracket 2 can be improved. And after the vehicle is severely collided, the installation bracket 2 can apply a force to the breakable connecting member 4, which can cause the breakable connecting member 4 to break, and the lower swing arm 3 can be separated from the installation bracket 2, that is, the damage to other structures such as the lower swing arm 3 caused by the impact force can be reduced.

[0076] Among them, the breakable connecting member 4 is configured as a connecting bolt, and the bracket mounting member 5 is configured as a mounting bolt. The shear strength of the mounting bolt is greater than that of the connecting bolt. In this way, after the connecting bolt and the mounting bolt are subjected to the same impact force, the connecting bolt is more likely to break than the mounting bolt.

[0077] Specifically, the mounting bolt is used to fix the installation bracket 2, and the connecting bolt is used to connect the lower swing arm 3 and the installation bracket 2. Both the mounting bolt and the connecting bolt have a certain shear strength, which can ensure that the mounting bolt and the connecting bolt will not break during normal use, and the overall structure is stable and reliable. However, the shear strength of the mounting bolt is relatively large, and the shear strength of the connecting bolt is relatively small. After encountering other extreme situations such as collisions, the force is transmitted to the installation bracket 2. When the force received by the connecting bolt is greater than the set value, the connecting bolt breaks. Among them, the set value can be 120N.

[0078] Further, after the vehicle is collided, the impact force is sequentially transmitted to the vehicle frame longitudinal beam 1, the mounting bolt, the installation bracket 2, the connecting bolt, and the lower swing arm 3. And the part strengths of each part can be in descending order as the vehicle frame longitudinal beam 1, the lower swing arm 3, the installation bracket 2, the mounting bolt 5, and the connecting bolt 4. After the installation bracket 2 applies a shear force of 120N to the connecting bolt 4, the connecting bolt will break first.

[0079] Thus, the connecting bolt is made to break first as a weak link to absorb and release the collision energy, which can avoid more serious structural damages such as the mounting bracket 2 or the lower swing arm 3. By sacrificing the connecting bolt, the safety of other structures can be protected, potential maintenance costs and risks can be reduced, and the collision performance of the subframe assembly 100 can be improved.

[0080] In some embodiments, there are two frame side members 1, and a front cross member 71, a middle cross member 72, and a rear cross member 73 are connected between the two frame side members 1. The front cross member 71, the middle cross member 72, and the rear cross member 73 are spaced apart in the front - rear direction.

[0081] Specifically, in the embodiment as Figure 1 shown, the number of the frame cross members is three, and the three frame cross members are spaced apart in the vehicle longitudinal direction. Thus, the impact force during a frontal collision of the vehicle can be absorbed simultaneously from three positions by the three frame cross members, so as to enhance the reliability of protecting the vehicle body structure and passenger safety. And the three frame cross members are respectively the front cross member 71, the middle cross member 72, and the rear cross member 73. Thus, the impact force during the frontal collision of the vehicle can be absorbed and dispersed jointly by the front cross member 71, the middle cross member 72, and the rear cross member 73. At the same time, by spacing the front cross member 71, the middle cross member 72, and the rear cross member 73 apart in sequence in the vehicle longitudinal direction, the impact force during the frontal collision of the vehicle can be absorbed and dispersed simultaneously from three positions by the front cross member 71, the middle cross member 72, and the rear cross member 73, and the reliability of absorbing and dispersing the impact force can be enhanced.

[0082] The front end of the frame side member 1 is connected to the end of the front cross member 71, the middle part of the frame side member 1 is connected to the end of the middle cross member 72, and the rear end of the frame side member 1 is connected to the end of the rear cross member 73.

[0083] Specifically, by arranging the front cross member 71 between the front ends of the two frame side members 1, the front ends of the two frame side members 1 can be supported and connected by the front cross member 71. By arranging the middle cross member 72 between the middle parts of the two frame side members 1, the middle parts of the two frame side members 1 can be supported and connected by the middle cross member 72. By arranging the rear cross member 73 between the rear ends of the two frame side members 1, the rear ends of the two frame side members 1 can be supported and connected simultaneously by the rear cross member 73. The accuracy of the installation positions of the two frame side members 1 can be ensured, the reliability of the work of the frame side members 1 can be enhanced, and the impact force can be transmitted between the two frame side members 1 through the frame cross members, so as to enhance the reliability of absorbing and dispersing the impact force, that is, enhance the reliability of protecting the vehicle body structure and passenger safety.

[0084] Among them, the frame cross member 7 and the frame side member 1 can be integrally connected by welding with higher connection strength, or connected by fasteners such as bolts.

[0085] There are two lower control arms 3, and the two lower control arms 3 are respectively connected to the mounting brackets 2 of the two vehicle frame side members 1. The two vehicle frame side members 1 are symmetrically distributed along the transverse direction of the vehicle, and the two mounting brackets 2 are symmetrically distributed along the transverse direction of the vehicle. Moreover, the two lower control arms 3 are respectively connected to the two mounting brackets 2, which can make the lower control arms 3 symmetrically distributed along the transverse direction of the vehicle. The overall structure of the subframe assembly 100 is symmetric, the assembly is simple, and the structural strength at the two vehicle frame side members 1 is the same. When one of the two vehicle frame side members 1 of the vehicle is subjected to an offset collision, when the impact force is transmitted to their respective mounting brackets 2, the mounting brackets 2 exert a force on the connecting bolts, and both of the two connecting bolts can release the impact energy by breaking, reducing the damage of the impact energy to the mounting brackets 2 or the lower control arms 3 and improving the safety performance of the vehicle.

[0086] In addition, a reinforcing plate is provided in the hollow cavity 11 of the vehicle frame side member 1. The reinforcing plate is used to support the vehicle frame side member 1, which can improve the structural strength of the vehicle frame side member 1. Among them, the reinforcing plate and the vehicle frame side member 1 can be connected by welding or bolts and other means.

[0087] The present utility model also proposes a vehicle.

[0088] The vehicle according to the present utility model includes the subframe assembly 100 of any one of the above embodiments. The subframe assembly 100 includes a lower control arm 3 and a vehicle frame side member structure 101, and the vehicle frame side member structure 101 includes a vehicle frame side member 1 and a mounting bracket 2. The mounting bracket 2 is arranged to be connected to the inclined section of the vehicle frame side member 1, which can improve the bending stiffness of the mounting bracket 2. And a through hole 211 for mounting the lower control arm 3 is provided in the mounting bracket 2, which can realize the assembly or separation of the lower control arm 3 at the through hole 211, reduce the damage of the impact force during a collision to structures such as the lower control arm 3, and the mounting cavity 21 of the mounting bracket 2 can form peripheral protection for the breakable connecting member 4, avoiding the abnormal breakage of the breakable connecting member 4. In this way, after the vehicle is collided, the breakable connecting member 4 will break normally in a set manner to protect the safety of other structures, reduce the maintenance cost, thereby improving the safety strategy of vehicle collision and protecting the passengers and drivers to the greatest extent.

[0089] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0090] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A frame longitudinal beam structure, characterized in that: include: A frame longitudinal beam, wherein at least a portion of the frame longitudinal beam is configured as an inclined section, and the inclined section is configured to extend outwardly from rear to front; A mounting bracket is connected to the inclined section, wherein the mounting bracket forms a mounting cavity with multiple closed sides, wherein the mounting cavity has a through-hole opened toward the outside of the frame longitudinal beam, and the through-hole is used to mount the inner front end of the lower swing arm.

2. The frame longitudinal beam structure according to claim 1, characterized in that: The mounting bracket includes a front side plate, an intermediate connecting plate and a rear side plate, the front side plate and the rear side plate are relatively distributed and connected to the front and rear ends of the intermediate connecting plate to jointly define the mounting cavity, the penetration opening is formed between the front side plate and the rear side plate and is relatively distributed with the intermediate connecting plate along the transverse direction of the vehicle, and the front side plate and / or the rear side plate are connected to the inclined section.

3. The frame longitudinal beam structure according to claim 2, characterized in that: A hollow cavity is formed in the frame longitudinal beam, the mounting bracket is located in the hollow cavity, the frame longitudinal beam comprises an inner side wall, a top wall, an outer side wall and a bottom wall connected in sequence, the inner side wall and the outer side wall are relatively distributed along the inner-outer direction, and the top wall and the bottom wall are relatively distributed along the upper-lower direction; Wherein, the front side plate and / or the rear side plate are connected to the top wall and / or the bottom wall via a bracket mounting member.

4. The frame longitudinal beam structure according to claim 3, characterized in that: The front side plate and / or the rear side plate are formed with connecting bosses, the connecting bosses are formed with connecting holes, and the bracket mounting piece is sequentially penetrated through the top wall, the connecting hole and the bottom wall.

5. The frame longitudinal beam structure according to claim 1, characterized in that: The frame longitudinal beam includes a front beam section and a rear beam section, the front beam section is constructed as the inclined section, the rear beam section extends along the front-to-back direction, the mounting bracket is mounted on the front beam section, and the rear beam section is suitable for being movably connected to the inner rear end of the lower swing arm.

6. A subframe assembly, characterized in that: The invention comprises a lower control arm and a frame longitudinal beam structure as described in any one of claims 1 to 5, wherein a mounting portion is provided at an inner front end of the lower control arm, and the mounting portion is suitable for extending from the penetration opening into the mounting cavity to be movably connected to the mounting bracket through a breakable connecting piece, the breakable connecting piece is penetrated through the mounting cavity, the inner rear end of the lower control arm is movably connected to the frame longitudinal beam, the outer side of the lower control arm is suitable for being fixed relative to a wheel, and the mounting bracket is suitable for acting on the breakable connecting piece and causing the breakable connecting piece to break during a collision.

7. The subframe assembly according to claim 6, characterized in that: The breakable connecting member is configured as a connecting bolt, and the mounting portion is configured as a mounting sleeve, and the mounting sleeve is sleeved outside the connecting bolt.

8. The subframe assembly according to claim 7, characterized in that: One of the front side plate or the rear side plate of the mounting bracket is provided with a matching recessed groove, the connecting bolt penetrates the mounting bracket along the front-to-back direction, and the connecting bolt is connected to the connecting nut at the matching recessed groove.

9. The subframe assembly according to claim 6, characterized in that: The mounting bracket is detachably connected to the inclined section via a bracket mounting member; Wherein, the breakable connecting member is configured as a connecting bolt, the bracket mounting member is configured as a mounting bolt, and the shear strength of the mounting bolt is greater than the shear strength of the connecting bolt.

10. The subframe assembly according to claim 6, characterized in that: There are two frame longitudinal beams, and a front cross beam, a middle cross beam and a rear cross beam are connected between the two frame longitudinal beams, and the front cross beam, the middle cross beam and the rear cross beam are spaced apart and distributed along the front-to-back direction; The front end of the frame longitudinal beam is connected to the end of the front cross beam, the middle part of the frame longitudinal beam is connected to the end of the middle cross beam, and the rear end of the frame longitudinal beam is connected to the end of the rear cross beam.

11. A vehicle, characterized in that: The vehicle comprises the subframe assembly according to any one of claims 6 to 10.

Images