Lower vehicle body structure and vehicle

Abstract

The utility model discloses a lower vehicle body structure and a vehicle, the lower vehicle body structure comprises: a front vehicle body frame, which comprises a front floor and two first longitudinal beams, a plurality of first cross beams are arranged between the two first longitudinal beams, two opposite ends of each first cross beam are connected with the two first longitudinal beams through first connecting pieces, the plurality of first cross beams are lapped on the front floor; the rear vehicle body frame comprises two second longitudinal beams, a plurality of second cross beams are arranged between the two second longitudinal beams, and the two opposite ends of the second cross beams are arranged on the two first longitudinal beams in a penetrating mode respectively. The front vehicle body frame and the rear vehicle body frame which are connected with each other are arranged, the first cross beams are arranged between the two first longitudinal beams of the front vehicle body frame, the first cross beams and the front floor can be welded to form a cavity, and the requirement for lap joint of the front floor is met. A plurality of second cross beams are arranged between the two second longitudinal beams of the rear vehicle body frame and can support the cargo compartment, so that the strength requirement of the rear vehicle frame for bearing the cargo compartment is met, and meanwhile, the types of parts are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body frame technology, and in particular to a lower body structure and vehicle. Background Technology

[0002] Traditional fuel-powered commercial vehicles have engines, transmissions, air filters, fuel tanks, exhaust systems, etc. The spatial layout requires the design of seat frames, left and right cover plates, engine and transmission mounting brackets, and various fixing points for fuel tanks, air filters, exhaust systems, etc. The front and rear frames both adopt round tube beam structures, making the body structure relatively complex.

[0003] The existing vehicle body structure has the following defects: 1. The front and rear crossbeams of the frame are all made of round tube beams, and the crossbeams do not overlap with the floor, so a connecting bracket is required to support the floor; 2. There is a seat frame structure, which occupies a lot of space in the driver's cabin, has poor sealing, is exposed to heat radiation from the engine, and has a cramped space and poor experience; 3. It is necessary to design left and right cover plates, suspension mounting brackets, fuel tank mounting brackets, exhaust mounting points, etc., which makes the structure more complex and increases weight and cost; 4. The manufacturing process is complex. Utility Model Content

[0004] The purpose of this utility model is to provide a lower body structure and vehicle to solve the problems in the prior art, so that the crossbeams and the floor can overlap without the need for connecting brackets, thereby simplifying the vehicle body structure and improving the manufacturing process.

[0005] In a first aspect, this utility model provides a lower body structure, comprising:

[0006] The front vehicle body frame includes a front floor and two first longitudinal beams. A plurality of first cross beams are provided between the two first longitudinal beams. The opposite ends of each first cross beam are connected to the two first longitudinal beams through a first connector. The plurality of first cross beams overlap the front floor.

[0007] The rear vehicle frame includes two second longitudinal beams, which correspond one-to-one with two first longitudinal beams. Each second longitudinal beam is connected to the corresponding first longitudinal beam. Multiple second crossbeams are provided between the two second longitudinal beams, and the opposite ends of the multiple second crossbeams pass through the two second longitudinal beams respectively.

[0008] In the vehicle body structure described above, preferably, the first connecting member is a transition joint, and the opposite ends of each first crossbeam are connected to the corresponding first longitudinal beam through the transition joint.

[0009] In the vehicle body structure described above, preferably, each of the second longitudinal beams is provided with a plurality of reinforcing members, which are used to increase the connection strength between the second longitudinal beam and the second cross beam.

[0010] In the vehicle body structure described above, preferably, the reinforcing member includes a first reinforcing plate and a second reinforcing plate, the first reinforcing plate and the second reinforcing plate are respectively disposed on the inner side and the outer side of the second longitudinal beam, and the opposite ends of the second crossbeam pass through the corresponding first reinforcing plate and the second longitudinal beam in sequence and are connected to the second reinforcing plate.

[0011] In the vehicle body structure described above, preferably, the front floor is provided with a rear lower crossbeam and a rear lower crossbeam cover plate at one end near the rear vehicle body frame, and the extension direction of the rear lower crossbeam and the extension direction of the rear lower crossbeam cover plate have a preset angle.

[0012] In the vehicle body structure described above, preferably, the opposite ends of the lower rear crossbeam are connected to the opposite ends of the lower rear crossbeam cover plate, so that a cavity structure is formed between the lower rear crossbeam and the lower rear crossbeam cover plate, and the cavity structure can enhance the rigidity of the vehicle body structure.

[0013] In the vehicle body structure described above, preferably, the front floor includes a front floor rear crossbeam, and a seat mounting bracket is provided on the front floor. The seat mounting bracket is connected to the front floor, the front floor rear crossbeam, and the rear lower crossbeam cover plate, respectively.

[0014] In the vehicle body structure described above, preferably, a first support plate and a second support plate are provided at both ends of the lower crossbeam of the rear panel. The first support plate is connected to the lower crossbeam of the rear panel, the frame, the side panel, and the inner sill plate, and the second support plate is connected to the frame, the side panel, and the inner sill plate.

[0015] In the vehicle body structure described above, preferably, both the first longitudinal beam and the second longitudinal beam are provided with multiple battery mounting points.

[0016] Secondly, this utility model provides a vehicle including the aforementioned undercarriage structure.

[0017] Compared with existing technologies, this utility model features an interconnected front and rear vehicle body frame. The front vehicle body frame has multiple first crossbeams between two first longitudinal beams. These first crossbeams can be welded to the front floor to form cavities, eliminating the need for a supporting structure on the front floor and fulfilling the requirements for front floor overlap. The rear vehicle body frame has multiple second crossbeams between two second longitudinal beams. These second crossbeams support the cargo box, thus meeting the strength requirements for the rear frame to bear the cargo box. This design also reduces the number of parts, simplifies the manufacturing process, and contributes to weight reduction and cost reduction. Attached Figure Description

[0018] Figure 1 This is a perspective view of the lower body structure provided in an embodiment of the present utility model;

[0019] Figure 2 This is a perspective view of the lower body structure provided in an embodiment of the present invention;

[0020] Figure 3 This is a partial schematic diagram of the front vehicle frame provided in an embodiment of the present invention;

[0021] Figure 4 This is a partial schematic diagram of the rear vehicle frame provided in an embodiment of the present utility model;

[0022] Figure 5 This is a first partial cross-sectional view of the front vehicle frame provided in an embodiment of the present invention;

[0023] Figure 6 This is a second partial cross-sectional view of the front vehicle frame provided in an embodiment of the present invention;

[0024] Figure 7 This is a partial schematic diagram of the undercarriage structure provided in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10-Front body frame, 11-Front floor, 12-First longitudinal beam, 13-First crossbeam, 14-First connector, 15-Lower crossbeam of the rear panel, 16-Lower crossbeam cover plate of the rear panel, 17-Cavity structure, 18-Seat mounting bracket, 191-First support plate, 192-Second support plate;

[0027] 20-Rear body frame, 21-Second longitudinal beam, 22-Second cross beam, 23-Strengthening member, 231-First reinforcing plate, 232-Second reinforcing plate;

[0028] 30 - Battery mounting point. Detailed Implementation

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Firstly, referring to Figure 1 as well as Figure 2 As shown, this utility model provides a lower body structure, including a front body frame 10 and a rear body frame 20, wherein:

[0031] The front vehicle frame 10 includes a front floor 11 and two first longitudinal beams 12. Multiple first crossbeams 13 are provided between the two first longitudinal beams 12. The opposite ends of each first crossbeam 13 are connected to the two first longitudinal beams 12 via first connectors 14. All the first crossbeams 13 overlap the front floor 11. The multiple first crossbeams 13 increase the connection strength between the two first longitudinal beams 12, thereby improving the structural strength of the front vehicle frame 10.

[0032] In the embodiments provided in this application, the first crossbeam 13 is a stamped crossbeam. Based on the structural characteristics of the stamped crossbeam, multiple stamped crossbeams are set between the two first longitudinal beams 12. The multiple stamped crossbeams overlap the front floor 11, which can improve the overall strength and stability of the frame. When the lower body structure is applied to the vehicle, the stamped crossbeams can disperse the impact force to other reasonable parts when the vehicle body is hit, which is beneficial to improving the vehicle's crash resistance performance and thus protecting the key parts of the vehicle.

[0033] The rear body frame 20 includes two second longitudinal beams 21, which correspond one-to-one with two first longitudinal beams 11. Each second longitudinal beam 21 is connected to a corresponding first longitudinal beam 12, so that the front body frame 10 and the rear body frame 20 form a complete lower body structure. Multiple second crossbeams 22 are provided between the two second longitudinal beams 21, with each second crossbeam 22 having its opposite ends passing through the two second longitudinal beams 21.

[0034] The second crossbeam 22 is a circular tube crossbeam. The circular tube crossbeam has a hollow tube structure and has a strong load-bearing capacity. Setting multiple circular tube crossbeams between the two second longitudinal beams 21 can reduce the weight of the rear vehicle frame 20 and is conducive to the lightweight design of the lower vehicle structure.

[0035] The front body frame 10 of this application adopts a structure of several stamped crossbeams, and the rear body frame 20 adopts a structure of several round tube crossbeams to form the lower body structure, so as to meet the requirements of front floor overlap and rear frame load-bearing strength of cargo box.

[0036] Reference Figure 3 As shown, the first connector 14 is a transition joint. The two ends of each first crossbeam 13 are connected to the corresponding first longitudinal beam 12 through the transition joint. The transition joint can effectively eliminate manufacturing problems caused by dimensional errors and improve the overall strength and stability of the undercarriage structure.

[0037] Since the two ends of the second crossbeam 22 pass through the corresponding second longitudinal beam 21, in order to enhance the connection strength between the second crossbeam 22 and the second longitudinal beam 21, refer to Figure 4As shown, each of the second longitudinal beams 21 is provided with multiple reinforcing members 23. The multiple reinforcing members 23 are used to increase the connection strength between the second longitudinal beam 21 and the second cross beam 22. In the embodiment provided in this application, the reinforcing member 23 includes a first reinforcing plate 231 and a second reinforcing plate 232. The first reinforcing plate 231 and the second reinforcing plate 232 are respectively disposed on the inner side and the outer side of the second longitudinal beam 21. The two ends of the second cross beam 22 pass through the corresponding first reinforcing plate 231 and the second longitudinal beam 21 in sequence and are connected to the second reinforcing plate 232.

[0038] The first reinforcing plate 231 is spot-welded to the inner side of the second longitudinal beam 21, enhancing the connection strength between the second cross beam 22 and the second longitudinal beam 21 at the first reinforcing plate 231. After passing through the first reinforcing plate 231 and the second longitudinal beam 21, the second cross beam 22 extends to the outer side of the second longitudinal beam 21 and is fixedly connected to the second reinforcing plate 232 by MIG welding. Under the action of the second reinforcing plate 232, the connection strength between the second cross beam 22 and the outer side of the second longitudinal beam 21 is increased. The second cross beam 22 and the second longitudinal beam 21 have two connection points, thereby increasing the overall strength of the rear vehicle frame 20.

[0039] In the embodiments provided in this application, the front floor 11 is provided with a rear lower crossbeam 15 and a rear lower crossbeam cover plate 16 at one end near the rear vehicle frame 20. The rear lower crossbeam 15 is an important component of the rear floor structure and mainly bears the transmission of rear load and collision force. The rear lower crossbeam cover plate 16 mainly plays the role of protecting and reinforcing the rear floor longitudinal beam. The extension direction of the rear lower crossbeam 15 and the extension direction of the rear lower crossbeam cover plate 16 have a preset angle.

[0040] Reference Figure 5 As shown, the two ends of the lower rear crossbeam 15 are connected to the two ends of the lower rear crossbeam cover plate 16. Since there is a preset angle between the extension direction of the lower rear crossbeam 15 and the extension direction of the lower rear crossbeam cover plate 16, a cavity structure 17 can be formed between the lower rear crossbeam 15 and the lower rear crossbeam cover plate 16. This cavity structure 17 can enhance the rigidity and torsional resistance of the lower body structure. In the event of a collision, the cavity structure 17 can better disperse and absorb the impact force.

[0041] Furthermore, the front floor 11 includes a front floor rear crossbeam, and a seat mounting bracket 18 is provided on the front floor 11. The seat mounting bracket 18 is connected to the front floor 11, the front floor rear crossbeam, and the rear lower crossbeam cover plate 16, which can not only improve the installation strength of the seat mounting bracket 18 on the front floor 11, but also enhance the strength and rigidity of the rear panel area.

[0042] In one feasible implementation, refer to Figure 6As shown, the lower rear crossbeam 15 is provided with a first support plate 191 and a second support plate 192 at both ends. The first support plate 191 is connected to the lower rear crossbeam 15, the frame, the side panels, and the inner sill plate, while the second support plate 192 is connected to the frame, the side panels, and the inner sill plate. The lower rear crossbeam 15 is connected to the frame, the side panels, and the inner sill plate through the first support plate 191 and the second support plate 192 to form a stable structure, significantly improving the rigidity and torsional resistance of the entire vehicle.

[0043] Reference Figure 7 As shown, multiple battery mounting points 30 are provided on both the first longitudinal beam 12 and the second longitudinal beam 21. Since the first longitudinal beam 12 and the second longitudinal beam 21 have sufficiently high strength to meet the requirements of battery installation, the battery can be installed on the first longitudinal beam 12 and the second longitudinal beam 21, which can reduce the number of battery mounting brackets and the number of parts in the lower body structure, thus saving costs.

[0044] Preferably, four battery mounting points 30 can be provided on the first longitudinal beam 12 and the second longitudinal beam 21 on the same side to meet the battery installation requirements.

[0045] Secondly, this utility model provides a vehicle including the aforementioned lower body structure. Because the aforementioned lower body structure has high structural strength and features simplified structure and lightweight design, it can meet the spatial arrangement and structural strength requirements of a vehicle, thus improving NVH performance.

[0046] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A lower body structure, characterized in that, include: The front vehicle body frame includes a front floor and two first longitudinal beams. A plurality of first cross beams are provided between the two first longitudinal beams. The opposite ends of each first cross beam are connected to the two first longitudinal beams through a first connector. The plurality of first cross beams overlap the front floor. The rear vehicle frame includes two second longitudinal beams, which correspond one-to-one with two first longitudinal beams. Each second longitudinal beam is connected to the corresponding first longitudinal beam. Multiple second crossbeams are provided between the two second longitudinal beams, and the opposite ends of the multiple second crossbeams pass through the two second longitudinal beams respectively.

2. The undercarriage structure according to claim 1, characterized in that, The first connector is a transition joint, and each of the opposite ends of the first crossbeam is connected to the corresponding first longitudinal beam through the transition joint.

3. The undercarriage structure according to claim 1, characterized in that, Each of the second longitudinal beams is provided with multiple reinforcing members, which are used to increase the connection strength between the second longitudinal beam and the second cross beam.

4. The undercarriage structure according to claim 3, characterized in that, The reinforcing member includes a first reinforcing plate and a second reinforcing plate. The first reinforcing plate and the second reinforcing plate are respectively disposed on the inner side and the outer side of the second longitudinal beam. The two ends of the second crossbeam pass through the corresponding first reinforcing plate and the second longitudinal beam in sequence and are connected to the second reinforcing plate.

5. The undercarriage structure according to claim 1, characterized in that, The front floor is provided with a rear lower crossbeam and a rear lower crossbeam cover plate at one end near the rear vehicle frame. The extension direction of the rear lower crossbeam and the extension direction of the rear lower crossbeam cover plate have a preset angle.

6. The undercarriage structure according to claim 5, characterized in that, The two ends of the lower rear crossbeam are connected to the two ends of the lower rear crossbeam cover plate, so that a cavity structure is formed between the lower rear crossbeam and the lower rear crossbeam cover plate, and the cavity structure can enhance the rigidity of the lower body structure.

7. The undercarriage structure according to claim 5, characterized in that, The front floor includes a front floor rear crossbeam, and a seat mounting bracket is provided on the front floor. The seat mounting bracket is connected to the front floor, the front floor rear crossbeam, and the rear floor lower crossbeam cover plate, respectively.

8. The undercarriage structure according to claim 5, characterized in that, The lower crossbeam of the rear panel is provided with a first support plate and a second support plate at both ends. The first support plate is connected to the lower crossbeam of the rear panel, the frame, the side panel and the inner sill plate, and the second support plate is connected to the frame, the side panel and the inner sill plate.

9. The undercarriage structure according to claim 1, characterized in that, Both the first and second longitudinal beams are equipped with multiple battery mounting points.

10. A vehicle, characterized in that, Includes the undercarriage structure as described in any one of claims 1 to 9.

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