Subframe and vehicle

Abstract

The utility model discloses an auxiliary frame and a vehicle, and the auxiliary frame comprises two longitudinal beams which are transversely spaced; the cross beam is connected between the two longitudinal beams which are transversely spaced; the two first reinforcing rods are transversely spaced, the front ends of the first reinforcing rods are connected to the longitudinal beams and located behind the cross beams, the rear ends of the first reinforcing rods are used for being connected with a battery pack, and in the direction from front to back, the distance between the two first reinforcing rods which are transversely spaced is gradually decreased. Therefore, by arranging the first reinforcing rod, the force transmission path between the auxiliary frame and the battery pack can be increased, so that the lateral rigidity of the longitudinal beam and the structural strength of the battery pack are improved, and the structural reliability of the auxiliary frame and the control performance of the whole vehicle are improved.

Description

Technical Field

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

[0002] Compared with the engine and gearbox of traditional fuel vehicles, the electric motor of new energy vehicles requires less space. Due to consumers' preference for rear space in the cabin, the front cabin space of new energy vehicles is extremely compressed compared with fuel vehicles. Under increasingly stringent collision requirements, the passive safety of new energy vehicles is more difficult. As the main path of head-on collision and small offset collision, the design optimization path of the body longitudinal beam and front subframe in limited space becomes extremely important.

[0003] In the related art, the front mounting point of the reinforcing bar is arranged at the lower part of the middle cross beam, and the rear mounting point is arranged at the lower part of the battery pack. Such an arrangement will lead to the problems of complex installation structure of the front electric axle and the front subframe and insufficient layout space. It will also lead to low lateral stiffness of the longitudinal beam on the subframe, resulting in the risk of severe twisting and deformation of the subframe when subjected to a lateral collision, thereby seriously affecting the safety of life and property of the driver and passengers. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a subframe, which can increase the force transmission path between the subframe and the battery pack by setting a first reinforcing rod, thereby facilitating the improvement of the lateral stiffness of the longitudinal beam and the structural strength of the battery pack.

[0005] The utility model further provides a vehicle.

[0006] According to the first aspect of the utility model, the subframe includes: two transversely spaced longitudinal beams; a transverse beam connected between the two transversely spaced longitudinal beams; two transversely spaced first reinforcing rods, the front ends of the first reinforcing rods are connected to the longitudinal beams and are located behind the transverse beams, and the rear ends of the first reinforcing rods are used to connect to the battery pack, and in the direction from front to rear, the spacing between the two transversely spaced first reinforcing rods decreases.

[0007] Therefore, by providing the first reinforcing rod, the force transmission path between the subframe and the battery pack can be increased, which is beneficial to improving the lateral stiffness of the longitudinal beam and the structural strength of the battery pack, thereby improving the structural reliability of the subframe and the handling performance of the entire vehicle.

[0008] In some examples of the present invention, a rear end of the first reinforcing rod is connected to a transverse middle portion of the battery pack.

[0009] In some examples of the present invention, the subframe further includes: a first mounting bracket, the first mounting bracket is connected to the inner side of the longitudinal beam, and the front end of the first reinforcing rod is connected to the first mounting bracket.

[0010] In some examples of the present invention, a first cavity is formed inside the first mounting bracket, and a front end of the first mounting bracket is connected to the crossbeam.

[0011] In some examples of the present invention, the first reinforcing rod includes: a rod body, a second cavity is formed in the rod body; a first mounting head, the first mounting head is arranged at the front end of the rod body, and the first mounting head is connected to the longitudinal beam; a second mounting head, the second mounting head is arranged at the rear end of the rod body, and the second mounting head is used to connect the battery pack.

[0012] In some examples of the present invention, the upper surface of the first mounting head is lower than the upper surface of the rod body; and / or the upper surface of the second mounting head is higher than the upper surface of the rod body, so as to perform installation from below the mounting hole of the battery pack.

[0013] In some examples of the present invention, the subframe further includes: two transversely spaced second reinforcing rods, the front ends of the second reinforcing rods being connected to the longitudinal beam and being located behind the front ends of the first reinforcing rods, the rear ends of the second reinforcing rods being used to connect to the sill beam, and the spacing between the two transversely spaced second reinforcing rods increasing in the direction from front to rear.

[0014] In some examples of the present invention, the subframe further includes: a second mounting bracket, the second mounting bracket is connected to the lower surface of the longitudinal beam, and the front end of the second reinforcing rod is connected to the second mounting bracket.

[0015] The vehicle according to the second aspect of the utility model comprises: the above-mentioned subframe; a battery pack, wherein the battery pack is located behind the subframe, and the rear end of the first reinforcing rod is connected to the battery pack.

[0016] In some examples of the present invention, a mounting block is provided in the middle of the front end of the battery pack, and the rear end of the first reinforcing rod is mounted on the mounting block and is located below the mounting block.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a subframe according to an embodiment of the utility model;

[0020] Figure 2 is a top view of a subframe according to an embodiment of the utility model;

[0021] Figure 3 is a schematic structural diagram of a first reinforcing rod according to an embodiment of the utility model;

[0022] Figure 4 is a top view of a first reinforcing rod according to an embodiment of the utility model;

[0023] Figure 5 yes Figure 4 Cross-sectional view along the AA direction.

[0024] Reference numerals:

[0025] 100, subframe; 200, door sill beam; 201, mounting block;

[0026] 1. Longitudinal beam; 2. Horizontal beam;

[0027] 3. first reinforcing rod; 31. rod body; 311. second cavity; 32. first mounting head; 33. second mounting head;

[0028] 4. First mounting bracket; 5. Second reinforcing rod; 6. Second mounting bracket. DETAILED DESCRIPTION

[0029] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0030] Reference below Figure 1-Figure 5 The subframe 100 according to the embodiment of the utility model is described. The force transmission path between the subframe 100 and the battery pack can be increased by providing the first reinforcing rod 3, thereby facilitating the improvement of the lateral stiffness of the longitudinal beam 1 and the structural strength of the battery pack.

[0031] Combination Figure 1-Figure 5As shown, the sub-frame 100 according to the first embodiment of the utility model comprises two longitudinal beams 1 spaced laterally, a cross beam 2 and two first reinforcing rods 3 spaced laterally. The longitudinal beam 1 generally extends in the longitudinal direction (i.e., the front-to-back direction), the cross beam 2 extends in the transverse direction (i.e., the left-right direction), and the cross beam 2 and the two longitudinal beams 1 spaced laterally constitute the main structural framework of the sub-frame 100, so that the overall structural strength and bending-torsion rigidity of the sub-frame 100 in the transverse and longitudinal directions can be improved. In addition, the two first reinforcing rods 3 spaced laterally can further improve the structural strength of the sub-frame 100, thereby improving the overall structural reliability of the sub-frame 100.

[0032] Specifically, the cross beam 2 is connected between two laterally spaced longitudinal beams 1, the front end of the first reinforcing rod 3 is connected to the longitudinal beam 1, and the front end of the first reinforcing rod 3 is located behind the cross beam 2, and the rear end of the first reinforcing rod 3 is used to connect the battery pack. In the direction from front to rear, the distance between the two laterally spaced first reinforcing rods 3 decreases.

[0033] In detail, the longitudinal beams 1 are arranged at corresponding intervals along the transverse direction, the cross beam 2 is connected to the opposite longitudinal beams 1 along the transverse direction, the front end and the rear end of the first reinforcing rod 3 are connected to the longitudinal beam 1 and the battery pack respectively, and the spacing between the two transversely spaced first reinforcing rods 3 gradually decreases from the front to the rear, so that the cross beam 2, the two transversely spaced longitudinal beams 1, the two transversely spaced first reinforcing rods 3 and the battery pack can be connected as a whole (the above structures are together surrounded by a closed force-bearing frame), and the above structures enhance each other's weight and spatial mode, thereby improving their own structural strength and bending and torsional stiffness, thereby improving the anti-collision performance of the subframe 100 along different directions and the structural stability of the battery pack, and improving the handling performance of the whole vehicle.

[0034] In addition, the spacing between the two first reinforcing rods 3 spaced laterally decreases gradually in the direction from front to rear. Compared with the cross-type reinforcing rods (that is, the spacing between the two reinforcing rods spaced laterally first decreases and then increases gradually in the direction from front to rear), it can not only meet the structural strength of the sub-frame 100, but also avoid the problem of occupying too much vertical (that is, up and down direction) space due to the cross-setting of the reinforcing rods. The arrangement of the two first reinforcing rods 3 spaced laterally in this case is simpler and more efficient, and can also improve the utilization rate of the vertical space of the sub-frame 100 (for example, such an arrangement can provide more vertical arrangement space for the motor, suspension system, cooling system and high and low voltage lines), thereby improving the rationality of the arrangement.

[0035] Moreover, the arrangement of the first reinforcing rod 3 can also form a force transmission path between the longitudinal beam 1 and the battery pack, so that the subframe 100 or the battery pack can transmit the force to each other through the first reinforcing rod 3 when subjected to an external force of a collision, thereby effectively restraining the lateral displacement of the subframe 100 or the battery pack, thereby achieving the effect of effectively dispersing the impact force of the collision and improving the stability and reliability of the entire vehicle structure.

[0036] Therefore, by providing the first reinforcing rod 3, the force transmission path between the subframe 100 and the battery pack can be increased, which is beneficial to improving the lateral stiffness of the longitudinal beam 1 and the structural strength of the battery pack, thereby improving the structural reliability of the subframe 100 and the handling performance of the entire vehicle.

[0037] According to some optional embodiments of the present invention, combined with Figure 1-Figure 2 As shown, the rear end of the first reinforcing rod 3 is connected to the transverse middle part of the battery pack. Such an arrangement can facilitate the two transversely spaced first reinforcing rods 3 to maintain good alignment with the battery pack, and the connection between the first reinforcing rod 3 and the battery pack is located in the transverse middle part of the battery pack. In this way, the force on the battery pack along both sides of the transverse direction can be more uniform, avoiding the problem of stress concentration on one lateral side of the battery pack, thereby effectively improving the force uniformity between the battery pack and the first reinforcing rod 3, and then improving the structural stability of the battery pack.

[0038] According to some optional embodiments of the present invention, combined with Figure 1-Figure 2 As shown, the subframe 100 further includes a first mounting bracket 4, which is connected to the inner side of the longitudinal beam 1, and the front end of the first reinforcing rod 3 is connected to the first mounting bracket 4. The first mounting bracket 4 is formed on the inner side of the longitudinal beam 1, and the first mounting bracket 4 can increase the weight and spatial mode of the longitudinal beam 1, thereby increasing the structural strength and rigidity of the longitudinal beam 1.

[0039] In addition, the first mounting bracket 4 can provide a mounting and fixing position for the first reinforcing rod 3 under the premise of shortening the connection path between the first reinforcing rod 3 and the longitudinal beam 1, so that the first reinforcing rod 3 can smoothly establish an indirect connection relationship with the longitudinal beam 1. On the one hand, the span size of the first reinforcing rod 3 can be reduced, and on the other hand, the first reinforcing rod 3 can be stably and firmly installed on the first mounting bracket 4, thereby effectively improving the structural reliability of the subframe 100.

[0040] Specifically, combined Figure 1-Figure 2As shown, a first cavity is formed inside the first mounting bracket 4, and the front end of the first mounting bracket 4 is connected to the cross beam 2. It can be understood that the front end of the first mounting bracket 4 is connected to the rear side of the cross beam 2, and the lateral end of the first mounting bracket 4 is connected to the inner side of the longitudinal beam 1, so that the weight and spatial mode of the connection between the cross beam 2 and the longitudinal beam 1 can be increased, thereby focusing on improving the structural strength and bending and torsional rigidity of the weak force point (that is, the connection between the cross beam 2 and the longitudinal beam 1), thereby improving the structural stability of the subframe 100.

[0041] According to some optional embodiments of the present invention, combined with Figure 3-Figure 5 As shown, the first reinforcing rod 3 includes a rod body 31, a first mounting head 32 and a second mounting head 33. A second cavity 311 is formed in the rod body 31. The first mounting head 32 is arranged at the front end of the rod body 31. The first mounting head 32 is connected to the longitudinal beam 1. The second mounting head 33 is arranged at the rear end of the rod body 31. The second mounting head 33 is used to connect the battery pack.

[0042] That is to say, the rod body 31 forms a second cavity 311 along its length direction, and the cross section of the cavity can provide a larger section modulus. Such a design can reduce the deadweight while meeting the requirements of the structural strength and bending and torsional rigidity of the rod body 31, thereby improving practicality and economy. In addition, the front end and the rear end of the rod body 31 are respectively provided with a first mounting head 32 and a second mounting head 33, and the first mounting head 32 and the second mounting head 33 are respectively connected to the longitudinal beam 1 and the battery pack, so that the first reinforcing rod 3, the longitudinal beam 1 and the battery pack can be connected as a whole, thereby improving the structural strength of each other.

[0043] Optionally, combined Figure 3-Figure 4 As shown, the upper surface of the first mounting head 32 is lower than the upper surface of the rod body 31. With this arrangement, the first mounting head 32 can change the upper surface position of the rod body 31 in the vertical direction, thereby facilitating the first reinforcing rod 3 to be adapted and connected to the lower surface of the longitudinal beam 1, and can also increase the connection contact area between the first reinforcing rod 3 and the longitudinal beam 1, thereby improving the connection firmness between the first reinforcing rod 3 and the longitudinal beam 1.

[0044] Alternatively, combining Figure 3-Figure 4 As shown, the upper surface of the second mounting head 33 is higher than the upper surface of the rod body 31 so that it can be installed from below the mounting hole of the battery pack. With this arrangement, the second mounting head 33 can lift the upper surface position of the rod body 31 in the vertical direction, thereby facilitating the first reinforcing rod 3 to be adapted and connected to the mounting hole of the battery pack, and can also increase the connection contact area between the first reinforcing rod 3 and the battery pack, thereby improving the connection firmness and installation convenience between the first reinforcing rod 3 and the battery pack.

[0045] According to some optional embodiments of the present invention, combined with Figure 1-Figure 2As shown, the subframe 100 further includes two transversely spaced second reinforcing rods 5, the front ends of the second reinforcing rods 5 are connected to the longitudinal beam 1, and the front ends of the second reinforcing rods 5 are located behind the front ends of the first reinforcing rods 3, and the rear ends of the second reinforcing rods 5 are used to connect to the sill beam 200. In the direction from front to rear, the spacing between the two transversely spaced second reinforcing rods 5 increases gradually.

[0046] Among them, the front end and the rear end of the second reinforcing rod 5 are connected to the longitudinal beam 1 and the threshold beam 200 respectively, so that the longitudinal beam 1, the second reinforcing rod 5 and the threshold beam 200 can be connected as a whole, and the three can enhance each other's weight and spatial mode, thereby improving their own structural strength and bending and torsional rigidity, thereby improving the anti-collision performance of the subframe 100 in different directions and the structural stability of the threshold beam 200, and improving the handling performance of the whole vehicle.

[0047] In addition, the spacing between the two transversely spaced second reinforcing rods 5 gradually increases in the direction from front to rear. Such an arrangement can, on the one hand, match the positional relationship between the longitudinal beam 1 and the door sill beam 200. On the other hand, since the battery pack is located on the inner side of the second reinforcing rod 5, a certain degree of protection can be provided to the battery pack. A force path of the longitudinal beam 1-second reinforcing rod 5-door sill beam 200 can also be formed, thereby further achieving the effect of fully dispersing the collision impact force, thereby improving the structural reliability and stability of the entire vehicle.

[0048] Specifically, combined Figure 1-Figure 2 As shown, the subframe 100 further includes a second mounting bracket 6 , which is connected to the lower surface of the longitudinal beam 1 , and the front end of the second reinforcing rod 5 is connected to the second mounting bracket 6 .

[0049] It is understandable that the lower surface of the longitudinal beam 1 is formed with a second mounting bracket 6, and the second mounting bracket 6 can provide a mounting and fixing position for the second reinforcing rod 5, thereby ensuring the connection firmness and position stability between the second reinforcing rod 5 and the longitudinal beam 1. For example, the second mounting bracket 6 can be directly fixed to the longitudinal beam 1 by screwing, that is, the longitudinal beam 1 is provided with an internal thread, and the fastener passes through the second mounting bracket 6 from bottom to top and is threadedly matched with the internal thread of the longitudinal beam 1, thereby connecting the second mounting bracket 6 and the longitudinal beam 1 as a whole.

[0050] The vehicle according to the second embodiment of the utility model includes the subframe 100 and the battery pack of the above embodiment, the battery pack is located behind the subframe 100, and the rear end of the first reinforcing rod 3 is connected to the battery pack. In this way, the vehicle with the subframe 100 can effectively improve the lateral stiffness of the subframe 100 and improve the protection of the battery pack, thereby improving the safety of the whole vehicle and further improving the market competitiveness of the vehicle.

[0051] Specifically, combined Figure 1-Figure 2As shown, a mounting block 201 is provided in the middle of the front end of the battery pack, and the rear end of the first reinforcing rod 3 is mounted on the mounting block 201 , and the rear end of the first reinforcing rod 3 is located below the mounting block 201 .

[0052] That is to say, the rear end of the first reinforcing rod 3 is installed and connected below the mounting block 201 in the middle of the front end of the battery pack, so that a connection relationship with the battery pack can be established without occupying the vertical space below the battery pack, thereby avoiding the first reinforcing rod 3 interfering with the arrangement of the motor, suspension system, cooling system and high and low voltage lines in the vertical space, increasing the vertical space utilization of the whole vehicle, and thus improving the rationality of the vehicle's space layout.

[0053] Optionally, the battery pack and the two first reinforcing rods 3 spaced laterally apart can be constructed into a stable force-bearing structure similar to a K-shape; the first reinforcing rod 3, part of the longitudinal beam 1, the second reinforcing rod 5, the sill beam 200 and the battery pack can be constructed into a stable force-bearing structure similar to a triangle. The above arrangement can effectively improve the force stability between the subframe 100, the battery pack and the sill beam 200, thereby improving the structural reliability of the entire vehicle.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A subframe, characterized in that: include: two longitudinal beams spaced laterally; A cross beam connected between two of the longitudinal beams spaced laterally apart; Two first reinforcing rods are spaced apart laterally, wherein the front end of the first reinforcing rod is connected to the longitudinal beam and is located behind the cross beam, and the rear end of the first reinforcing rod is used to connect the battery pack. In the direction from front to rear, the spacing between the two first reinforcing rods spaced apart laterally decreases.

2. The subframe according to claim 1, characterized in that: The rear end of the first reinforcing rod is connected to the transverse middle portion of the battery pack.

3. The subframe according to claim 1, characterized in that: Also includes: A first mounting bracket is connected to the inner side of the longitudinal beam, and a front end of the first reinforcing rod is connected to the first mounting bracket.

4. The subframe according to claim 3, characterized in that: A first cavity is formed inside the first mounting bracket, and a front end of the first mounting bracket is connected to the crossbeam.

5. The subframe according to claim 1, characterized in that: The first reinforcing rod comprises: A rod body, wherein a second cavity is formed in the rod body; A first mounting head, the first mounting head is arranged at the front end of the rod body, and the first mounting head is connected to the longitudinal beam; A second mounting head is disposed at the rear end of the rod body, and the second mounting head is used to connect the battery pack.

6. The subframe according to claim 5, characterized in that: The upper surface of the first mounting head is lower than the upper surface of the rod body; and / or The upper surface of the second mounting head is higher than the upper surface of the rod body so as to be mounted from below the mounting hole of the battery pack.

7. The subframe according to claim 1, characterized in that: Also includes: Two second reinforcing rods are spaced apart laterally, wherein the front ends of the second reinforcing rods are connected to the longitudinal beam and are located behind the front ends of the first reinforcing rods, and the rear ends of the second reinforcing rods are used to connect to the threshold beam. In the direction from front to rear, the spacing between the two second reinforcing rods spaced apart laterally increases.

8. The subframe according to claim 7, characterized in that: Also includes: A second mounting bracket is connected to a lower surface of the longitudinal beam, and a front end of the second reinforcing rod is connected to the second mounting bracket.

9. A vehicle, characterized in that: include: The subframe according to any one of claims 1 to 8; A battery pack is located behind the sub-frame, and a rear end of the first reinforcing rod is connected to the battery pack.

10. The vehicle according to claim 9, characterized in that A mounting block is provided at the middle of the front end of the battery pack, and the rear end of the first reinforcing rod is mounted on the mounting block and is located below the mounting block.

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