Auxiliary frame of new energy automobile

Abstract

The invention provides an auxiliary frame of a new energy automobile. Comprising a first longitudinal beam, a second longitudinal beam, a first fixing piece, a second fixing piece, a third fixing piece, a fourth fixing piece, a first cross beam, a second cross beam, a third cross beam and a fourth cross beam, wherein the first longitudinal beam and the second longitudinal beam are arranged in parallel; a reinforcing cross beam is arranged between the first longitudinal beam and the second longitudinal beam, the height of the bottom face of the reinforcing cross beam is smaller than that of the bottom face of the first cross beam, the reinforcing cross beam comprises a first C-shaped plate, a second C-shaped plate located in the first C-shaped plate and a collision rod fixedly connected to the lower portion of the first C-shaped plate, and the collision rod is fixedly connected to the lower portion of the second C-shaped plate. And profiled grooves matched with the first C-shaped plate and the second C-shaped plate are formed in the first longitudinal beam and the second longitudinal beam in a penetrating manner. The strength of the reinforcing cross beam can be improved, so that the protection effect on the battery pack is improved.

Description

A subframe for new energy vehicles Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a subframe for new energy vehicles. Background Technology

[0002] The subframe is an "intermediate bridge" or "skeleton platform" that connects key components such as the suspension system and powertrain to the main body.

[0003] In existing technology, the subframe has a crash beam that is lower than the main structure. When the vehicle encounters a tall obstacle during driving, it will first hit the crash beam to protect the battery pack structure behind it. Although the current crash beam can withstand a certain impact, the strength of the crash beam still needs to be optimized to avoid excessive deformation of the crash beam itself or the connection between the crash beam and the main structure of the subframe when dealing with strong impacts. In view of the shortcomings of the prior art, the present invention aims to provide a subframe for new energy vehicles, which is intended to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a subframe for a new energy vehicle, comprising two parallel first longitudinal beams and second longitudinal beams, a first fixing member and a second fixing member respectively disposed at the front and rear ends of the first longitudinal beams, a third fixing member and a fourth fixing member respectively disposed at the front and rear ends of the second longitudinal beams, a first crossbeam connected at both ends to the first fixing member and the third fixing member, and a second crossbeam connected at both ends to the second fixing member and the fourth fixing member, wherein a reinforcing crossbeam is provided between the first longitudinal beams and the second longitudinal beams, the bottom surface height of the reinforcing crossbeam being lower than the bottom surface height of the first crossbeam, the reinforcing crossbeam comprising a first C-shaped plate, a second C-shaped plate located inside the first C-shaped plate, and a collision rod fixed below the first C-shaped plate, wherein grooves are provided through the first longitudinal beams and the second longitudinal beams to cooperate with the first C-shaped plate and the second C-shaped plate.

[0005] According to one aspect of the above technical solution, the first C-shaped plate is located below the second C-shaped plate, and the second C-shaped plate and the first C-shaped plate are fixed together by welding.

[0006] According to one aspect of the above technical solution, the two ends of the first C-shaped plate and the second C-shaped plate extend outward from the outside of the first longitudinal beam and the second longitudinal beam, and the connection between the first C-shaped plate and the second C-shaped plate and the first longitudinal beam and the second longitudinal beam is fixed by welding.

[0007] According to one aspect of the above technical solution, the first C-shaped plate and the collision rod are provided with multiple through holes at intervals on their adjacent sides, and fixing bolts are fixed in the through holes to fix the first C-shaped plate and the collision rod together.

[0008] According to one aspect of the above technical solution, the collision rod is a hollow structure, and the bottom surface height of the collision rod is lower than the bottom surface height of the first crossbeam.

[0009] According to one aspect of the above technical solution, the first C-shaped plate is connected to the first longitudinal beam and the second longitudinal beam by inclined beams respectively.

[0010] According to one aspect of the above technical solution, the first fixing member, the second fixing member, the third fixing member and the fourth fixing member are all provided with fixing sleeves, and the fixing sleeves are used to connect the suspension of the car.

[0011] The present invention also provides a new energy vehicle, including the new energy vehicle subframe as described above.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: A first longitudinal beam, a second longitudinal beam, a first crossbeam, and a second crossbeam are provided and connected by a first fixing member, a second fixing member, a third fixing member, and a fourth fixing member. A reinforcing crossbeam is provided between the first and second longitudinal beams, with the bottom surface of the reinforcing crossbeam lower than that of the first crossbeam. Thus, when the vehicle encounters a higher obstacle during travel, it will contact the first crossbeam, which will then transfer the force to the reinforcing crossbeam, effectively blocking and absorbing energy from the obstacle, thereby reducing the impact on the rear battery pack. For slightly lower obstacles, the vehicle will directly contact the reinforcing crossbeam, which also blocks and absorbs energy from the obstacle, further reducing the impact on the rear battery pack. This application sacrifices some passability in exchange for the safety of the battery pack. Specifically, the reinforcing beam includes a first C-shaped plate, a second C-shaped plate located inside the first C-shaped plate, and a collision rod fixed below the first C-shaped plate. Regarding the structural form of the first and second C-shaped plates, the first C-shaped plate serves as the main load-bearing component, and the second C-shaped plate as the auxiliary load-bearing component. This interlocking structure significantly improves impact resistance compared to a square tube structure. The collision rod is used to contact obstacles and transmit force to the upper first C-shaped plate. Grooves corresponding to the shapes of the first and second C-shaped plates are provided on the first and second longitudinal beams, through which the first and second C-shaped plates are inserted. Because the collision rod exerts a backward pressure and a torsional force on the first and second longitudinal beams above it when it comes into contact with the obstacle, the above-mentioned structural arrangement allows the first and second C-shaped plates to penetrate through the first and second longitudinal beams. The contact area between the first and second C-shaped plates and the first and second longitudinal beams is large, and the shape of the groove is consistent with that of the first and second C-shaped plates. This improves the overall integrity between the first and second C-shaped plates and the first and second longitudinal beams, enabling the first and second longitudinal beams to withstand the backward pressure and torsional force. This prevents the collision rod from being impacted and causing the overall structure to deform due to insufficient connection strength.

[0013] This invention can increase the strength of the reinforcing beam to improve the protection of the battery pack. Figure 1 is a structural schematic diagram of the subframe of the new energy vehicle in the first embodiment of the present invention; Figure 2 is a structural schematic diagram of the reinforced crossbeam hidden in Figure 1; Figure 3 is a structural schematic diagram of the reinforced crossbeam in Figure 1 from a first perspective; Figure 4 is a structural schematic diagram of the reinforced crossbeam in Figure 1 from a second perspective; Explanation of main component symbols:

[0014] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0015] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0016] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] Please refer to Figures 1 to 4, which show a new energy vehicle subframe according to the first embodiment of the present invention. It includes two parallel first longitudinal beams 1 and second longitudinal beams 2, a first fixing member 5 and a second fixing member 6 respectively disposed at the front and rear ends of the first longitudinal beam 1, a third fixing member 7 and a fourth fixing member 8 respectively disposed at the front and rear ends of the second longitudinal beam 2, a first crossbeam 3 connected to the first fixing member 5 and the third fixing member 7 at both ends, and a second crossbeam 4 connected to the second fixing member 6 and the fourth fixing member 8 at both ends. A reinforcing crossbeam 11 is provided between the first longitudinal beam 1 and the second longitudinal beam 2. The bottom height of the reinforcing crossbeam 11 is lower than the bottom height of the first crossbeam 3. The reinforcing crossbeam 11 includes a first C-shaped plate 111, a second C-shaped plate 112 located inside the first C-shaped plate 111, and a collision rod 113 fixed below the first C-shaped plate 111. The first longitudinal beam 1 and the second longitudinal beam 2 are provided with grooves 12 that cooperate with the first C-shaped plate 111 and the second C-shaped plate 112.

[0019] Understandably, a first longitudinal beam 1, a second longitudinal beam 2, a first crossbeam 3, and a second crossbeam 4 are configured and connected by a first fixing member 5, a second fixing member 6, a third fixing member 7, and a fourth fixing member 8. A reinforcing crossbeam 11 is installed between the first longitudinal beam 1 and the second longitudinal beam 2, with the bottom surface of the reinforcing crossbeam 11 being lower than the bottom surface of the first crossbeam 3. This way, when the vehicle encounters a higher obstacle during driving, it will touch the first crossbeam 3, and the first crossbeam 3 will then transfer the force to the reinforcing crossbeam 11, which can act as a barrier and absorb energy from the obstacle, thereby reducing the impact of the obstacle on the rear battery pack. For slightly lower obstacles, they will directly touch the reinforcing crossbeam 11, which will also act as a barrier and absorb energy from the obstacle, thus reducing the impact of the obstacle on the rear battery pack. This application sacrifices some passability in exchange for the safety of the battery pack. Specifically, the reinforcing beam 11 includes a first C-shaped plate 111, a second C-shaped plate 112 located inside the first C-shaped plate 111, and a collision rod 113 fixed below the first C-shaped plate 111. Regarding the structural form of the first C-shaped plate 111 and the second C-shaped plate 112, the first C-shaped plate 111 serves as the main load-bearing component, and the second C-shaped plate 112 serves as the auxiliary load-bearing component. This interlocking structure significantly improves impact resistance compared to a square tube structure. The collision rod 113 is used to contact obstacles and transmit force to the upper first C-shaped plate 111. Grooves 12 corresponding to the shapes of the first C-shaped plate 111 and the second C-shaped plate 112 are provided on the first longitudinal beam 1 and the second longitudinal beam 2, through which the first C-shaped plate 111 and the second C-shaped plate 112 are disposed. Since the collision rod 113 exerts a backward pressure and a torsional force on the first longitudinal beam 1 and the second longitudinal beam 2 when it comes into contact with the obstacle, the first C-shaped plate 111 and the second C-shaped plate 112 penetrate the first longitudinal beam 1 and the second longitudinal beam 2 through the above-mentioned structural arrangement. The contact area between the first C-shaped plate 111 and the second C-shaped plate 112 and the first longitudinal beam 1 and the second longitudinal beam 2 is large, and the shape of the groove 12 is consistent with the first C-shaped plate 111 and the second C-shaped plate 112, which improves the integrity between the first C-shaped plate 111 and the second C-shaped plate 112 and the first longitudinal beam 1 and the second longitudinal beam 2. This allows the first longitudinal beam 1 and the second longitudinal beam 2 to withstand the backward pressure and torsional force, and avoids the overall deformation of the structure due to the low connection strength after the collision rod 113 is impacted.

[0020] The present invention can increase the strength of the reinforcing beam 11 to improve the protection of the battery pack.

[0021] Specifically, the first C-shaped plate 111 is located below the second C-shaped plate 112, and the second C-shaped plate 112 and the first C-shaped plate 111 are fixed together by welding; the two ends of the first C-shaped plate 111 and the second C-shaped plate 112 extend out of the outside of the first longitudinal beam 1 and the second longitudinal beam 2, and the connection between the first C-shaped plate 111 and the second C-shaped plate 112 and the first longitudinal beam 1 and the second longitudinal beam 2 is fixed together by welding.

[0022] Understandably, due to the large size of the first C-shaped plate 111, it is connected to the collision rod 113. During a collision, the collision rod 113 directly transmits the force to the upper first C-shaped plate 111, increasing the structural strength. This allows the ends of the first C-shaped plate 111 and the second C-shaped plate 112 to extend beyond the outer sides of the first longitudinal beam 1 and the second longitudinal beam 2, maximizing the contact area between the first C-shaped plate 111 and the second C-shaped plate 112 and the first longitudinal beam 1 and the second longitudinal beam 2, thereby maximizing the welding area and increasing the weld strength, ultimately improving the overall structural strength. Furthermore, multiple through holes 114 are spaced apart on the sides of the first C-shaped plate 111 and the collision rod 113 that are close to each other. Fixing bolts 115 are fixed in the through holes 114 to securely connect the first C-shaped plate 111 and the collision rod 113. The collision rod 113 is a hollow structure, and the bottom surface of the collision rod 113 is lower than the bottom surface of the first crossbeam 3.

[0023] Understandably, the connection between the first C-shaped plate 111 and the collision rod 113 is made by fixing bolts 115, which makes the connection between the first C-shaped plate 111 and the collision rod 113 firm and strong in shear and compression resistance. When the obstacle touches the collision rod 113, the force can be smoothly transferred to the first C-shaped plate 111 above.

[0024] Furthermore, the first C-shaped plate 111 is connected to the first longitudinal beam 1 and the second longitudinal beam 2 by inclined beams 10 respectively.

[0025] Understandably, by connecting the first C-shaped plate 111 to the first longitudinal beam 1 and the second longitudinal beam 2 with inclined beams 10, when the first C-shaped plate 111 is under pressure, the inclined beams 10 can support the middle part of the first C-shaped plate 111, thus preventing the middle part of the first C-shaped plate 111 from being impacted and deformed too much.

[0026] Furthermore, the first fixing member 5, the second fixing member 6, the third fixing member 7 and the fourth fixing member 8 are all provided with fixing sleeves 9, which are used to connect the vehicle's suspension.

[0027] Understandably, the subframe is connected to the suspension via four fasteners at the four corners to improve body strength and reduce vibration and noise from the suspension system.

[0028] In summary, the new energy vehicle subframe in the above embodiments of the present invention can increase the strength of the reinforcing beam to improve the protection effect on the battery pack. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0029] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A subframe for a new energy vehicle, characterized in that, The device includes two parallel longitudinal beams, a first and a second longitudinal beam, a first and a second fixing member respectively located at the front and rear ends of the first longitudinal beam, a third and a fourth fixing member respectively located at the front and rear ends of the second longitudinal beam, a first crossbeam connected at both ends to the first and the third fixing members respectively, and a second crossbeam connected at both ends to the second and the fourth fixing members respectively. A reinforcing crossbeam is provided between the first and second longitudinal beams. The bottom surface of the reinforcing crossbeam is lower than the bottom surface of the first crossbeam. The reinforcing crossbeam includes a first C-shaped plate, a second C-shaped plate located inside the first C-shaped plate, and a collision rod fixed below the first C-shaped plate. Grooves that cooperate with the first and the second C-shaped plates are provided through the first and the second longitudinal beams.

2. The new energy vehicle subframe according to claim 1, characterized in that, The first C-shaped plate is located below the second C-shaped plate, and the second C-shaped plate and the first C-shaped plate are fixed together by welding.

3. The new energy vehicle subframe according to claim 1, characterized in that, The first C-shaped plate and the second C-shaped plate extend beyond the outer sides of the first longitudinal beam and the second longitudinal beam, and the connection between the first C-shaped plate and the second C-shaped plate and the first longitudinal beam and the second longitudinal beam is fixed by welding.

4. The new energy vehicle subframe according to claim 1, characterized in that, The first C-shaped plate and the collision rod are provided with multiple through holes at intervals on their adjacent sides, and fixing bolts are fixed in the through holes to fix the first C-shaped plate and the collision rod together.

5. The new energy vehicle subframe according to claim 1, characterized in that, The collision rod has a hollow structure, and the bottom surface of the collision rod is lower than the bottom surface of the first crossbeam.

6. The new energy vehicle subframe according to claim 1, characterized in that, The first C-shaped plate is connected to the first longitudinal beam and the second longitudinal beam by inclined beams.

7. The new energy vehicle subframe according to claim 1, characterized in that, The first, second, third, and fourth fixing members are all provided with fixing sleeves, which are used to connect the vehicle's suspension.

8. A new energy vehicle, characterized in that, The new energy vehicle subframe includes any one of claims 1 to 7.

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