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 reinforcing plate is connected between the two longitudinal beams which are transversely spaced, the two longitudinal beams which are transversely spaced, the cross beam and the reinforcing plate form a closed-loop structure and jointly form a mounting space, and the rear end of the reinforcing plate is used for being connected with a doorsill beam. Therefore, by arranging the auxiliary frame, the lateral rigidity of the longitudinal beam can be effectively improved, so that the anti-collision capability of the auxiliary frame during lateral collision is improved, more arrangement space can be provided for related structures of the electric bridge and the auxiliary frame, the space arrangement is simplified, and the problem of insufficient arrangement space is solved.

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 effectively improve the lateral rigidity of the longitudinal beam and provide more layout space for the related structures of the electric bridge and the subframe.

[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; a reinforcing plate connected between the two transversely spaced longitudinal beams, the two transversely spaced longitudinal beams, the transverse beam and the reinforcing plate form a closed loop structure and together form an installation space, and the rear end of the reinforcing plate is used to connect to the threshold beam.

[0007] In the above technical solution, in the front-back direction, the cross beam and the reinforcing plate are respectively connected between two longitudinals spaced transversely. In this way, the two longitudinals spaced transversely, the cross beam and the reinforcing plate can be jointly connected to form a closed-loop force-bearing structural framework. Such an arrangement can, on the one hand, enable the above structures to enhance each other's weight and spatial mode, thereby improving the overall structural strength and bending and torsion stiffness of the subframe and reducing the deformation risk of the subframe when subjected to external forces; on the other hand, it can also form a closed force transmission path, so as to more evenly disperse external forces and avoid the risk of structural damage or fracture caused by local stress concentration, thereby improving the overall structural stability and reliability of the subframe. Among them, the cross beam, the two longitudinals spaced transversely and the reinforcing plate are configured in a closed-loop structure similar to a "mouth" character. This closed-loop structure can provide installation space for the motor, the suspension system, the cooling system and the high and low voltage lines, thereby reducing the layout complexity of the related structures at the subframe.

[0008] Therefore, by setting the subframe, the lateral stiffness of the longitudinal can be effectively improved, thereby enhancing the anti-collision ability of the subframe when subjected to a side collision. It can also provide more layout space for the relevant structures at the electric bridge and the subframe, thereby simplifying the space layout and solving the problem of insufficient layout space.

[0009] In some examples of the present utility model, the reinforcing plate includes: a base body, the base body is connected between two longitudinals spaced transversely; two mounting arms spaced transversely, the two mounting arms spaced transversely are respectively connected to the base body and extend backward, and the rear end of each mounting arm is used to connect the sill beam.

[0010] In some examples of the present utility model, two first mounting heads spaced transversely are provided at the front end of the base body, the first mounting heads protrude forward, and the first mounting heads are connected to the longitudinal.

[0011] In some examples of the present utility model, in the direction from back to front, the distance between the two first mounting heads spaced transversely increases.

[0012] In some examples of the present utility model, in the direction from back to front, the width of the first mounting head decreases.

[0013] In some examples of the present utility model, in the direction from front to back, the distance between the two mounting arms spaced transversely increases.

[0014] In some examples of the present utility model, the mounting arm includes: a second mounting head for connecting the sill beam; a connecting section connecting between the base body and the second mounting head, and in the direction from front to back, the width of the connecting section decreases.

[0015] In some examples of the present invention, an upper surface of the reinforcing plate is connected to a lower surface of the longitudinal beam.

[0016] In some examples of the present invention, the crossbeam is multiple and includes: a first crossbeam; a second crossbeam, the second crossbeam is located behind the first crossbeam, and the middle part of the second crossbeam is protruding toward the front on both sides relative to each other.

[0017] A vehicle according to a second aspect of the utility model includes: the above-mentioned subframe.

[0018] Compared with the prior art, the vehicle provided by the utility model adopts the layout of the subframe, which can effectively improve the anti-collision ability of the subframe when subjected to a lateral collision, and can also provide more layout space for related structures at the electric bridge and the subframe, solving the problem of insufficient layout space here, thereby improving the safety of the vehicle and the rationality of the space layout, and further improving the market competitiveness of the vehicle.

[0019] 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

[0020] 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:

[0021] Figure 1 It is a bottom view of the auxiliary frame according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100. Subframe;

[0024] 1. longitudinal beam; 2. transverse beam; 21. first transverse beam; 22. second transverse beam;

[0025] 3. Reinforcement plate; 31. Base; 311. First mounting head; 32. Mounting arm; 321. Second mounting head; 322. Connecting section. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0027] Reference below Figure 1 The subframe 100 according to the embodiment of the present invention is described, which can effectively improve the lateral rigidity of the longitudinal beam 1 and can also provide more arrangement space for the related structures at the electric bridge and the subframe 100 .

[0028] As an important component of the chassis structure of the automobile, the subframe 100 is mainly located at the front and / or rear of the vehicle, and serves as a mounting bracket for the front and rear axles and the suspension system. It is not a complete frame, but an additional frame that supports the front and rear axles and the suspension system. Through the connection with the vehicle body, it forms an intermediary between the suspension system and the vehicle body. The subframe 100 can isolate vibration and noise (that is, the subframe 100 is connected to the vehicle body through rubber bushings or hydraulic bushings, which can effectively absorb and isolate vibration and noise from the road surface and the suspension system, and improve the comfort of passengers in the vehicle), and can also enhance rigidity and stability (that is, the subframe 100 increases the overall rigidity of the suspension system, improves the vehicle's handling performance and driving stability, and reduces the distortion and vibration of the vehicle body), and can also improve its adaptability and flexibility (the design of the subframe 100 promotes the platformization of the vehicle, so that the same platform can adapt to different models, and the design requirements of different vehicles can be met by replacing the subframe 100 and the suspension configuration).

[0029] Combination Figure 1 As shown, the sub-frame 100 according to the embodiment of the first aspect of the utility model comprises two longitudinal beams 1 spaced apart in a transverse direction, a cross beam 2 and a reinforcing plate 3. Among them, the longitudinal beam 1 generally extends in the longitudinal direction (i.e., the front-rear direction), the cross beam 2 and the reinforcing plate 3 extend in the transverse direction (i.e., the left-right direction), the reinforcing plate 3 is located behind the cross beam 2, the cross beam 2, the two longitudinal beams 1 spaced apart in the transverse direction and the reinforcing plate 3 are connected to each other and together constitute the main structural frame of the sub-frame 100, so that the overall structural strength and bending and torsional rigidity of the sub-frame 100 in the transverse and longitudinal directions can be improved, thereby improving the structural reliability of the whole vehicle.

[0030] Specifically, the cross beam 2 is connected between the two laterally spaced longitudinal beams 1, the reinforcing plate 3 is connected between the two laterally spaced longitudinal beams 1, the two laterally spaced longitudinal beams 1, the cross beam 2 and the reinforcing plate 3 form a closed-loop structure and together form an installation space, and the rear end of the reinforcing plate 3 is used to connect to the threshold beam.

[0031] Specifically, in the front-to-back direction, the cross beam 2 and the reinforcing plate 3 are respectively connected between the two transversely spaced longitudinal beams 1, so that the two transversely spaced longitudinal beams 1, the cross beam 2 and the reinforcing plate 3 are connected together to form a closed-loop force-bearing structural frame. Such an arrangement can, on the one hand, enable the above structures to reinforce each other's weight and spatial mode, thereby improving the overall structural strength and bending and torsional rigidity of the subframe 100, and reducing the risk of deformation of the subframe 100 when subjected to external force; on the other hand, a closed force transmission path can be formed, thereby being able to more evenly disperse the external force, avoiding the risk of structural damage or fracture caused by local stress concentration, and thereby improving the overall structural stability and reliability of the subframe 100.

[0032] Among them, compared with the traditional reinforcement structure at the subframe (such as the arrangement form where the front end and the rear end of the fork-shaped beam are respectively connected to the cross beam 2 and the battery pack), the front end and the rear end of the reinforcement plate 3 in this case are respectively connected to the longitudinal beam 1 and the sill beam. In this way, the lateral force transmission path between the longitudinal beam 1 and the sill beam can be increased, thereby effectively improving the structural strength and the flexural and torsional stiffness of the longitudinal beam 1 and the sill beam in the transverse direction, and further enhancing the anti-collision ability of the subframe 100 and the sill beam when subjected to a lateral collision impact force, and also improving the handling performance.

[0033] In addition, compared with a vehicle with a long front overhang requirement (where the battery pack and the front panel are arranged rearward, if a reinforcement bar solution is adopted, the longitudinal angle of the reinforcement bar is small and it cannot provide lateral stiffness support, which is not conducive to achieving the front dynamic stiffness), the reinforcement plate 3 in this case extends transversely and is respectively connected to the rear end of the longitudinal beam 1 and the sill beam through its front end and rear end. With such an arrangement, the reinforcement plate 3, the longitudinal beam 1 and the sill beam can be connected as a whole, thereby effectively improving the lateral stiffness at the subframe 100 and the sill beam.

[0034] Moreover, since the general structure of the reinforcement plate 3 is a plate-like structure, on the one hand, it can provide a larger protection area for the structure above the reinforcement plate 3, and can also provide a wider installation plane, which is conducive to increasing the installation and layout space, thereby reducing the difficulty of the spatial layout of the relevant structures at the reinforcement plate 3, and further improving the practicality of the reinforcement plate 3.

[0035] Optionally, the cross beam 2, the two longitudinally spaced longitudinal beams 1 and the reinforcement plate 3 are configured in a closed-loop structure similar to a "mouth" character. This closed-loop structure can provide an installation space for the motor, the suspension system, the cooling system and the high and low voltage lines, thereby reducing the layout complexity of the relevant structures at the subframe 100.

[0036] Thus, by providing the subframe 100, the lateral stiffness of the longitudinal beam 1 can be effectively improved, thereby enhancing the anti-collision ability of the subframe 100 when subjected to a lateral collision, and can also provide more layout space for the relevant structures at the electric bridge and the subframe 100, thereby simplifying the spatial layout and solving the problem of insufficient layout space.

[0037] According to some alternative embodiments of the present invention, in combination with Figure 1 As shown, the reinforcement plate 3 includes a base body 31 and two transversely spaced mounting arms 32. The base body 31 is connected between the two transversely spaced longitudinal beams 1. The two transversely spaced mounting arms 32 are respectively connected to the base body 31, and the two transversely spaced mounting arms 32 extend rearward, and the rear end of each mounting arm 32 is used to connect to the sill beam.

[0038] Among them, the two transversely spaced mounting arms 32 are respectively connected to the transverse ends of the base 31, the mounting arms 32 change the extension direction of the base 31 and extend toward the rear, and the rear end of the mounting arms 32 is connected to the threshold beam, so that the reinforcing plate 3 can establish a connection relationship with the threshold beam, so that the reinforcing plate 3 can achieve the effect of connecting the longitudinal beam 1 and the threshold beam at the same time, thereby effectively enhancing the lateral stiffness of the longitudinal beam 1 and the threshold beam in the transverse direction, and improving the structural stability and handling performance of the whole vehicle.

[0039] Specifically, combined Figure 1 As shown, two first mounting heads 311 spaced laterally apart are disposed at the front end of the base 31 . The first mounting heads 311 are protruded toward the front side and are connected to the longitudinal beam 1 .

[0040] It is understandable that the first mounting head 311 can change the extension direction of the base 31, which extends forward, so that the longitudinal (i.e., front-to-back direction) span of the reinforcing plate 3 can be increased without increasing the overall longitudinal dimension of the base 31, thereby being able to establish a connection relationship with the longitudinal beam 1 on the basis of reducing the consumption of the plate material, thereby facilitating improving the economy and lightweight design effect of the subframe 100.

[0041] Furthermore, combined with Figure 1 As shown, in the direction from back to front, the spacing between the two laterally spaced first mounting heads 311 increases gradually. Such an arrangement allows the inner sides of the two laterally spaced first mounting heads 311 to form a flared outer contour with a gradually increasing lateral spacing. In this way, while meeting the structural strength of the first mounting heads 311, it is possible to reduce the material consumption of the inner sides of the two laterally spaced first mounting heads 311 relative to each other, and increase the spatial mode of the first mounting heads 311 in the lateral direction, thereby improving the bending and torsional stiffness of the first mounting heads 311, thereby improving the economy and structural reliability of the reinforcing plate 3.

[0042] Specifically, combined Figure 1 As shown, in the direction from back to front, the width of the first mounting head 311 decreases gradually. Such an arrangement can form a smooth stress transition effect in which the width of the first mounting head 311 gradually decreases as it moves away from the base 31, thereby avoiding the stress concentration problem caused by the sudden change in the width of the first mounting head 311, thereby improving the fatigue strength of the first mounting head 311 and further improving the structural reliability of the first mounting head 311.

[0043] Furthermore, combined with Figure 1As shown, in the direction from front to back, the spacing between the two installation arms 32 spaced laterally increases. That is to say, such an arrangement enables the inner sides of the two installation arms 32 spaced laterally to form an outer contour in a flared shape with a gradually increasing lateral spacing, so that on the basis of satisfying the structural strength of the installation arms 32, the material consumption of the inner sides of the two installation arms 32 spaced laterally relative to each other can be reduced, and the spatial mode of the first installation head 311 in the lateral direction can be increased, thereby improving the bending and torsional rigidity of the installation arms 32, and further improving the economy and structural reliability of the reinforcing plate 3.

[0044] Specifically, combined Figure 1 As shown, the mounting arm 32 includes a second mounting head 321 and a connecting section 322. The second mounting head 321 is used to connect to the sill beam. The connecting section 322 is connected between the base 31 and the second mounting head 321. In the direction from front to back, the width of the connecting section 322 decreases.

[0045] It is understandable that, as arranged above, the connecting section 322 can form a smooth stress transition effect with a gradually decreasing width in the process of moving away from the base 31, avoiding the stress concentration problem caused by a sudden change in the width of the connecting section 322, thereby improving the fatigue strength of the connecting section 322, and further improving the structural reliability of the mounting arm 32. In addition, the second mounting head 321 can smoothly establish a connection relationship between the mounting arm 32 and the longitudinal beam 1, thereby ensuring the connection stability between the reinforcing plate 3 and the longitudinal beam 1.

[0046] According to some optional embodiments of the present invention, combined with Figure 1 As shown, the upper surface of the reinforcing plate 3 is connected to the lower surface of the longitudinal beam 1. That is to say, in this way, on the basis of establishing a connection relationship between the reinforcing plate 3 and the longitudinal beam 1, the vertical space above the longitudinal beam 1 will not be occupied (avoiding the reinforcing plate 3 from 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 rate of the whole vehicle), and a certain degree of protection can be formed for the longitudinal beam 1, thereby improving the rationality of the space arrangement and structural reliability of the vehicle.

[0047] According to some optional embodiments of the present invention, combined with Figure 1 As shown, there are multiple cross beams 2 including a first cross beam 21 and a second cross beam 22. The second cross beam 22 is located behind the first cross beam 21, and the middle of the second cross beam 22 is protruding toward the front relative to both sides.

[0048] Among them, multiple cross beams 2 are arranged at intervals along the longitudinal direction (that is, the front-to-back direction), which can increase the force transmission path between the longitudinal beams 1 and the cross beams 2, thereby improving the force uniformity of the subframe 100, reducing the risks of stress concentration and local overload, and further improving the overall structural stability and reliability of the subframe 100.

[0049] In addition, the middle portion of the second cross beam 22 behind the first cross beam 21 protrudes forward relative to the lateral sides, so that the cross beam 2 can increase its own structural dimensions in the longitudinal direction within the limited lateral space, thereby improving the spatial modes of the first cross beam 21 along different directions (for example, the two sides of the first cross beam 21 are decomposed into lateral and longitudinal extension paths), thereby improving the bending and torsional rigidity and structural strength of the first cross beam 21, and improving the overall structural stability of the subframe 100.

[0050] Optionally, the two laterally spaced longitudinal beams 1, the second cross beam 22 and the reinforcing plate 3 can be configured with the front cross beam of the battery pack, the front floor of the vehicle body, and the door sill beam to form a stable load-bearing structure similar to a "K" shape and a triangle, thereby increasing the lateral stiffness (e.g., lateral and longitudinal) of the subframe 100 and further improving the handling performance of the entire vehicle.

[0051] The vehicle according to the embodiment of the second aspect of the utility model includes the subframe 100 of the above embodiment. The vehicle having the subframe 100 can effectively improve the anti-collision ability of the subframe 100 when subjected to a lateral collision, and can also provide more layout space for the related structures at the electric bridge and the subframe 100, solving the problem of insufficient layout space here, thereby improving the safety of the vehicle and the rationality of the space layout, and further improving the market competitiveness of the vehicle.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[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.

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; A reinforcing plate is connected between the two transversely spaced longitudinal beams. The two transversely spaced longitudinal beams, the transverse beam and the reinforcing plate form a closed loop structure and together form an installation space. The rear end of the reinforcing plate is used to connect to the threshold beam.

2. The subframe according to claim 1, characterized in that: The reinforcing plate comprises: A base body connected between two of the longitudinal beams spaced laterally apart; Two installation arms spaced apart in a transverse direction are respectively connected to the base body and extend backwards, and a rear end of each installation arm is used for connecting to the threshold beam.

3. The subframe according to claim 2, characterized in that: The front end of the base body is provided with two first mounting heads spaced laterally apart, the first mounting heads are protruding toward the front side, and the first mounting heads are connected to the longitudinal beam.

4. The subframe according to claim 3, characterized in that: In the direction from rear to front, the interval between the two laterally spaced first mounting heads increases gradually.

5. The subframe according to claim 3, characterized in that: In a direction from rear to front, the width of the first mounting head decreases gradually.

6. The subframe according to claim 2, characterized in that: In the direction from front to rear, the distance between two laterally spaced mounting arms increases.

7. The subframe according to claim 2, characterized in that: The mounting arm comprises: a second mounting head, the second mounting head being used for connecting the threshold beam; A connecting section is connected between the base body and the second mounting head, and the width of the connecting section decreases from the front to the rear.

8. The subframe according to claim 1, characterized in that: The upper surface of the reinforcing plate is connected to the lower surface of the longitudinal beam.

9. The subframe according to claim 1, characterized in that: The crossbeams are multiple and include: First beam; The second cross beam is located behind the first cross beam, and the middle part of the second cross beam is protruded toward the front at two opposite sides.

10. A vehicle, characterized in that: include: The subframe according to any one of claims 1 to 9.

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