Vehicle body front cabin structure and vehicle

Abstract

The vehicle body forecabin structure comprises a front anti-collision beam, a front wall cross beam and two front longitudinal beams used for connecting the front anti-collision beam and the front wall cross beam, the number of the front longitudinal beams is two, and the front longitudinal beams are symmetrically arranged between the front anti-collision beam and the front wall cross beam in the length direction of a vehicle body. The front anti-collision beam, the front wall cross beam and the front longitudinal beam are integrally formed in a die-casting mode and form an integral frame type structure. The utility model further comprises a vehicle which comprises the vehicle body forecabin structure. The front anti-collision beam, the front longitudinal beam and the front wall cross beam are integrally formed in a die-casting mode through the aluminum alloy materials, the size stability in the part forming process is guaranteed, and the collision strength of the whole vehicle is also guaranteed; meanwhile, the machining time is greatly shortened, the production efficiency is improved, more than ten parts of an original vehicle body front cabin can be reduced to one part, the vehicle type project development period and cost are reduced, and the vehicle body lightweight effect is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle body structure technical field, concretely relates to a vehicle body front cabin structure and vehicle. BACKGROUND

[0002] At present, the front cabin structure of the vehicle body is mostly sheet metal stamping parts, and is connected by welding, the technical route is that the front anti-collision beam, the front longitudinal beam, the front shock tower, the front wall lower plate, the front wall upper plate and other steel stamping sheet metal parts are connected by welding points after stamping forming in the welding workshop or the modular workshop to form the front cabin assembly.

[0003] But the front cabin structure of the vehicle body has the following problems: (1) the front longitudinal beam and the front anti-collision beam are connected as a single body, the connection strength is weak, and the strength is weak when the front vehicle collides and is rear-ended, which affects the safety of passengers; (2) the front longitudinal beam is generally a steel stamping structure, the cross section of the longitudinal beam is relatively simple, and the strength is weak, and the higher collision strength cannot be provided when the front part collides, which reduces the safety of the vehicle body structure; (3) the front wall plate formed by steel stamping is welded in two sections in an upper and lower split mode, the welding point connection strength is weak, there is a risk that the front cabin invades the passenger cabin when a collision occurs, which affects the safety of passengers; (4) it is difficult to guarantee the quality of the parts, the welding lap joints are many, the cumulative error is large, the precision size and consistency of each installation function hole on the front cabin assembly are reduced, thereby affecting the assembly of the hand tool and the gap difference quality after the assembly of the interior trim panel; (5) the traditional body-in-white adopts a stamping small part welding forming mode, the number of parts developed in the project development is large, the development cycle is long, and the cost is large.

[0004] In the prior art, with the development of the lightweight technology of the whole vehicle, many high-end vehicle models also gradually increase the proportion of lightweight alloys in the body-in-white, such as an integrated die-cast front wall cross beam, a cast shock tower and an aluminum profile front anti-collision beam, and the connection of the front cabin assembly is completed through a steel-aluminum mixed connection process, although the defects caused by the structure strength of the parts can be effectively solved, but the size deviation and the connection strength problem of the related parts in the vehicle body front cabin structure cannot be avoided when the parts are assembled and welded. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a vehicle body front cabin structure and vehicle, the front anti-collision beam, the front longitudinal beam and the front wall cross beam are integrally die-cast by using an aluminum alloy material, the stability of the size in the part forming process is guaranteed, the collision strength of the whole vehicle is guaranteed, the processing time is greatly reduced, the production efficiency is improved, the more than ten parts of the original vehicle body front cabin are reduced to one, the development cycle and the cost of the vehicle model project are reduced, and the lightweight effect of the vehicle body is greatly improved.

[0006] The front compartment structure of the vehicle body has the advantages that the front crash beam, the front longitudinal beam and the front wall cross beam are integrally pressure-cast, the overall vehicle body front compartment structure is simple and universal, and the platform design requirement is met.

[0007] Further, the front longitudinal beam is a U-shaped structure that is open to the outside in the vehicle body width direction, and a plurality of Chinese character'mi' shaped reinforcing rib structures are distributed in the front longitudinal beam along the vehicle body length direction.

[0008] Further, the reinforcing rib intersection points in the Chinese character'mi' shaped reinforcing rib structure are arranged at the parting line positions of the overall frame structure.

[0009] Further, the front crash beam is internally provided with a mesh-shaped reinforcing rib, and the mesh-shaped reinforcing rib is used for ensuring the strength of the front crash beam.

[0010] Further, the front crash beam and the front longitudinal beam are provided with a connecting reinforcing portion at the connecting position, and the connecting reinforcing portion is used for ensuring the stress conduction during the collision.

[0011] Further, the size of the front crash beam in the vehicle body width direction is greater than 80% of the overall vehicle width.

[0012] Further, a shock tower mounting point is pre-cast on the front longitudinal beam.

[0013] Further, a wire harness pipeline mounting point is also pre-cast on the front longitudinal beam.

[0014] Further, the front crash beam, the front wall cross beam and the front longitudinal beam are integrally pressure-cast by using an aluminum alloy material.

[0015] A vehicle is also provided, which comprises the above-mentioned vehicle body front compartment structure.

[0016] The utility model has the following beneficial effects:

[0017] (1) the front crash beam, the front longitudinal beam and the front wall cross beam are integrally pressure-cast, the overall vehicle body front compartment structure is simple and universal, and the platform design requirement is met;

[0018] (2) the front crash beam, the front longitudinal beam and the front wall cross beam are integrally pressure-cast by using an aluminum alloy material, the overall vehicle light weight can be greatly improved, and the cruising range is improved;

[0019] (3) the front crash beam, the front longitudinal beam and the front wall cross beam are integrally pressure-cast, the number of assembly connecting points is greatly reduced, and the vehicle body torsional stiffness and NVH performance are improved;

[0020] (4) By integrally die-casting the front bumper beam, the front longitudinal beam, and the front cross member, the processing and manufacturing time can be significantly reduced, which is beneficial for cost reduction of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0022] Figure 1 It is a front view structural diagram of the front cabin structure of the present utility model;

[0023] Figure 2 It is a rear view structural diagram of the front cabin structure of the present utility model;

[0024] Among them, the reference numerals are: 1 - front bumper beam; 2 - front cross member; 3 - front longitudinal beam; 4 - connecting and strengthening part; 5 - "rice" - shaped reinforcing rib; 6 - mesh - shaped reinforcing rib; 7 - wiring harness and pipeline installation point; 8 - shock tower installation point. SPECIFIC EMBODIMENTS

[0025] As shown in the figure, the front cabin structure provided by the present utility model includes a front bumper beam 1, a front cross member 2, and a front longitudinal beam 3 for connecting the front bumper beam 1 and the front cross member 2. There are two front longitudinal beams 3, which are symmetrically arranged along the vehicle body length direction between the front bumper beam 1 and the front cross member 2. The front bumper beam 1, the front cross member 2, and the front longitudinal beam 3 are integrally die - cast to form an integral frame - type structure. Among them, by forming an integral frame - type structure with a closed - structure ring for the front bumper beam 1, the front cross member 2, and the front longitudinal beam 3, the traditional steel part solder joints are eliminated, thereby optimizing the body bending strength, improving the body torsional stiffness and NVH performance. The overall strength is greatly improved compared with the separate welding of parts, which not only ensures the dimensional stability during the forming process of parts, but also ensures the collision strength of the front cabin structure of the vehicle body. And the closed - loop force - transmission path enables it to have higher strength during frontal and side collisions, ensuring that the occupant compartment is not invaded and improving the safety of the whole vehicle body.

[0026] In this embodiment, the front longitudinal beam 3 is a U - shaped structure that opens outward in the vehicle body width direction. Inside the front longitudinal beam 3, there are several "rice" - shaped reinforcing rib 5 structures distributed along the vehicle body length direction; Figure 1 As shown, the reinforcing ribs inside the front longitudinal beam 3 area adopt the "rice" - shaped reinforcing rib 5 structure design. The wall thickness of the central rib is 10 mm, which is convenient for the ingate of die - casting to enter. The wall thickness of the remaining ribs is 3 - 5 mm, and the weight is reduced as much as possible on the premise of ensuring the structural strength of the front longitudinal beam 3. And the "rice" - shaped reinforcing rib 5 structure inside the front longitudinal beam 3 is distributed along the vehicle body length direction to finally form a honeycomb - shaped reinforcing rib structure. This structure is both an aluminum liquid filling channel and a force - transmission path during a collision, improving the structural strength of the vehicle body during frontal and side collisions.

[0027] In this embodiment, the reinforcing rib intersection point in the "rice" shaped reinforcing rib 5 structure is arranged at the parting line position of the overall frame structure; by designing the reinforcing rib intersection point in the "rice" shaped reinforcing rib 5 structure at the product parting line position, the strength of the front longitudinal beam 3 itself is ensured, the normal flow and filling effect of the aluminum liquid in the mold during die casting are ensured, and then the high elongation of the front longitudinal beam 3 area product is ensured, and the overall frame structure strength is improved.

[0028] In this embodiment, the front anti-collision beam 1 is internally provided with a mesh reinforcing rib 6, and the mesh reinforcing rib 6 is used to ensure the strength of the front anti-collision beam 1; in combination with Figure 1 and Figure 2 It is shown that the front anti-collision beam 1 is internally provided with a mesh reinforcing rib structure to ensure the structural strength of the front anti-collision beam 1.

[0029] In this embodiment, the front anti-collision beam 1 and the front longitudinal beam 3 are provided with a connecting reinforcing part 4 at the connecting position, and the connecting reinforcing part 4 is used to ensure the stress conduction during the collision; in combination with Figure 2 It is shown that the connecting reinforcing part 4 is a diagonal support structure arranged at the connecting position of the front anti-collision beam 1 and the front longitudinal beam 3, and a diagonal parallel reinforcing rib structure is arranged inside the cavity of the connecting reinforcing part 4, wherein the wall thickness of the diagonal parallel reinforcing rib is 5mm, so as to ensure the collapse energy absorption and stress conduction of the front anti-collision beam 1 during the collision.

[0030] In this embodiment, the size of the front anti-collision beam 1 in the vehicle body width direction is greater than 80% of the overall vehicle width; since the front anti-collision beam also needs to consider the requirement of small area offset collision during design, the size of the front anti-collision beam 1 in the vehicle body width direction is greater than 80% of the overall vehicle width, so as to realize the defense of small area offset collision.

[0031] In this embodiment, the front longitudinal beam 3 is pre-cast with a shock tower mounting point 8, and the front longitudinal beam 3 is also pre-cast with a wire harness pipeline mounting point 7; by pre-casting the shock tower mounting point 8 and the wire harness pipeline mounting point 7 on the front longitudinal beam 3, the mounting point requirements of the front engine compartment of the vehicle body during subsequent installation with other parts are ensured, the processing and manufacturing time can be greatly reduced, and the overall vehicle cost can be reduced.

[0032] In this embodiment, the front anti-collision beam 1, the front wall cross beam 2 and the front longitudinal beam 3 are integrally die cast by using aluminum alloy material; wherein the front anti-collision beam 1, the front wall cross beam 2 and the front longitudinal beam 3 all use die cast aluminum alloy material, which is lighter than the traditional steel material, can greatly improve the overall vehicle lightweight, improve the cruising range, and also greatly improve the corrosion resistance of the overall vehicle.

[0033] The embodiment also provides a vehicle comprising the vehicle body front compartment structure, and by applying the vehicle body front compartment structure on the vehicle, the overall vehicle light weight can be greatly improved, the endurance mileage is improved, the processing time is greatly shortened, the production efficiency is improved, the vehicle body front compartment structure originally comprising more than ten parts is reduced to a whole structure, the vehicle model project development cycle and cost are reduced, meanwhile, the structure is simple and universal, and the platform design demand is met.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A vehicle body front compartment structure, characterized by: It includes a front bumper beam, a front bulkhead crossbeam, and a front longitudinal beam for connecting the front bumper beam and the front bulkhead crossbeam. There are two front longitudinal beams, which are symmetrically arranged between the front bumper beam and the front bulkhead crossbeam along the length of the vehicle body. The front bumper beam, the front bulkhead crossbeam, and the front longitudinal beam are integrally die-cast to form an integral frame structure.

2. The vehicle body front compartment structure according to claim 1, characterized by: The front longitudinal beam is a U-shaped structure that opens outward in the width direction of the vehicle body, and the interior of the front longitudinal beam has several cross-shaped reinforcing ribs distributed along the length direction of the vehicle body.

3. The vehicle body front compartment structure according to claim 2, characterized by: The intersection point of the reinforcing ribs in the cross-shaped reinforcing rib structure is located at the parting line of the overall frame structure.

4. The vehicle front compartment structure according to claim 1, characterized by: The front bumper beam is equipped with a mesh reinforcing rib, which is used to ensure the strength of the front bumper beam itself.

5. The vehicle front compartment structure according to claim 1, characterized by: A connecting reinforcement is provided at the connection between the front anti-collision beam and the front longitudinal beam, which is used to ensure the transmission of force during a collision.

6. The vehicle front compartment structure according to claim 1, characterized by: The front bumper beam is designed to be 80% larger than the width of the entire vehicle in the width direction.

7. The vehicle front compartment structure according to claim 2, characterized by: The front longitudinal beam has pre-cast installation points for the shock absorber tower.

8. The vehicle front compartment structure according to claim 2, characterized by: The front longitudinal beam also has pre-cast wiring harness installation points.

9. The vehicle front compartment structure according to claim 1, characterized by: The front bumper beam, the front crossbeam, and the front longitudinal beam are integrally die-cast from aluminum alloy.

10. A vehicle characterized by: Includes the vehicle front compartment structure as described in any one of claims 1-9.

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