CN115257952A - An automobile frame structure and automobile - Google Patents

Abstract

The invention relates to the technical field of vehicle body structures, and specifically discloses an automobile frame structure and an automobile. The automobile frame structure includes a C-ring structure and a V-shaped supporting structure. The C-ring structure includes two opposite side plate support plates, a top beam connected to the tops of the two side plate support plates, and a bottom beam connected between the bottoms of the two side plate support plates. The two ends of the V-shaped support structure are respectively fixed on the two side plate support plates or on the top beam at the same time, and the folded corners are fixed on the bottom beam. The V-shaped support structure is V-shaped and is installed within the quadrilateral C-ring structure. The C-ring structure is divided into three triangular structures, and the torsional stiffness performance of the car is improved by using the triangular stability characteristics. In addition, the V-shaped support structure improves the torsional stiffness mode, which is conducive to reducing the NHV problem of the car, and indirectly resists the impact of the luggage compartment.

Description

A kind of automobile frame structure and automobile

technical field

The invention relates to the technical field of vehicle body structures, in particular to an automobile frame structure and an automobile.

Background technique

With the improvement of people's living standards, people's requirements for the quality of cars are getting higher and higher. During the driving process of the car, the handling stability of the whole vehicle and NHV (Noise and Vibration and Harshness, noise, vibration and stability) issues are gradually being paid attention to by people. From the perspective of vehicle performance, the torsional stiffness performance of the vehicle has the most direct relationship with these problems. To improve the torsional rigidity of the car, the C-ring structure at the rear of the car is a very important structure.

In the existing technology, the main strategy to improve the torsional performance of the vehicle is to increase the cavity and sheet metal thickness of the bottom structure for the rear C-ring structure of the car body, the structural rigidity of the sunroof's overall reinforcement plate and the side wall, and the upper and lower structural cavities of the rear door opening. body and plate thickness. These measures are costly, but the degree of improvement is limited, and there is a problem of complex assembly process. Therefore, how to design a reinforced structure with convenient assembly and high torsional stiffness performance for the C-ring structure needs to be solved urgently.

Contents of the invention

The invention discloses an automobile frame structure and an automobile, which can improve the torsional rigidity performance of the automobile and relieve the NHV problem of the automobile.

To achieve the above object, the present invention provides the following technical solutions:

An automobile frame structure, comprising a C-ring structure and a V-shaped support structure;

The C-ring structure includes two opposite side plate support plates, a top beam connected to the tops of the two side plate support plates, and a bottom beam connected between the bottoms of the two side plate support plates;

The two ends of the V-shaped support structure are respectively fixed to the two side plate support plates or to the top beam at the same time, and the knuckles of the V-shaped support structure are fixed to the bottom beam.

Since the C-ring structure is a quadrilateral structure and has no stability, a V-shaped support structure is added in the C-ring structure area. The V-shaped support structure is V-shaped and installed within the quadrilateral range. The C-ring structure is divided into three triangular structures, and the triangular stability characteristics are used to improve the torsional stiffness performance of the car, thereby alleviating the NHV problem of the car. Such a structural design can also indirectly withstand the impact of luggage loaded in the car, and has the advantages of simple structure and convenient installation, which is conducive to popularization and use.

Optionally, along the extending direction of the V-shaped support structure, the cross-section of the V-shaped support structure is corrugated.

Optionally, a reinforcing plate is further included, the reinforcing plate is arranged on a side of the corner portion away from the bottom beam; the reinforcing plate and the corner portion are fixed to the bottom beam through a first connecting piece.

Optionally, the first connecting piece is a first bolt, the reinforcing plate is provided with a first installation hole, the corner part is provided with a second installation hole, and the bottom beam is provided with a third installation hole; The first bolts pass through the first mounting hole, the second mounting hole and the third mounting hole in sequence.

Optionally, the number of the first connecting parts is two.

Optionally, the end of the V-shaped support structure is fixed to the corresponding side plate support plate through a second connecting piece; or, the end of the V-shaped supporting structure is fixed to the top beam through a second connecting piece.

Optionally, the second connecting member is a second bolt, and a fourth mounting hole is provided on the end of the V-shaped support structure;

When the end of the V-shaped support structure is fixed to the corresponding side plate support plate through the second connecting piece, the fifth mounting hole is arranged on the side plate support plate; the second bolt passes through the The fourth mounting hole is threadedly matched with the fifth mounting hole;

When the end of the V-shaped support structure is fixed to the top cross beam through the second connecting piece, the top cross beam is provided with a fifth installation hole; the second bolt passes through the fourth installation hole and the top cross beam in turn. The fifth mounting hole is threaded.

Optionally, between each group of corresponding side plate support plates and the ends of the V-shaped support structure, the number of the second connecting pieces is three.

Optionally, the three connecting parts are distributed in a triangle.

A car, including a car body and the car frame structure;

The C-ring structure is fixed to the rear of the vehicle body.

Description of drawings

Figure 1a is a schematic structural view of an automobile frame provided by an embodiment of the present invention;

Fig. 1b is a disassembled schematic diagram of the automobile frame provided by the embodiment of the present invention;

Fig. 2a and Fig. 2b are the structural diagrams of the automobile frame that the embodiment of the present invention provides;

Fig. 3 is the front view of the V-shaped support structure provided by the embodiment of the present invention;

Fig. 4 is a schematic diagram of a reinforcing plate and a first connecting piece provided by an embodiment of the present invention;

Fig. 5 is a schematic diagram of a V-shaped support structure and a second connecting piece provided by an embodiment of the present invention.

Reference signs:

1-C ring structure; 11-top beam; 12-side support plate; 13-bottom beam;

2-V-shaped support structure; 21-the second installation hole; 22-the fourth installation hole; 3-reinforcing plate;

31 - the first mounting hole; 4 - the first connecting piece; 5 - the second connecting piece.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The present application provides an automobile frame structure, as shown in FIG. 1a and FIG. 1b , the automobile frame structure includes a C-ring structure 1 and a V-shaped support structure 2 . The C-ring structure 1 includes two opposite side plate support plates 12 , a top beam 11 connected to the top of the two side plate support plates 12 , and a bottom beam 13 connected between the bottoms of the two side plate support plates 12 . Fig. 1a shows the V-shaped supporting structure 2 fixed to the structure of the C-ring structure 1, and Fig. 1b shows the disassembled schematic view of the frame structure of the car.

On the basis of Fig. 1a, please continue to refer to Fig. 2a and Fig. 2b. As shown in Fig. 2a and Fig. 2b, the C-ring structure 1 is quadrangular. Due to the instability of the quadrangular structure, the C-ring structure 1 is easily deformed when stressed. When the rear part of the car body is subjected to a torsional load, the whole car is also easily torsional and deformed. The two ends of the V-shaped support structure 2 provided by the embodiment of the present application are respectively fixed on the two side plate support plates 12 (the schematic diagram of the structure shown in Figure 2a) or fixed on the top beam 11 at the same time (as shown in Figure 2b The schematic diagram shown). The knuckle part K of the V-shaped support structure 2 , that is, its bottommost part is fixed to the bottom beam 13 of the C-ring structure 1 .

In Fig. 2a, the two ends of the V-shaped support structure 2 are respectively fixed on two side plate support plates 12 for example, and the ends of the V-shaped support structure 2 are fixed on the end of the side plate support plate 12 close to the top beam 11 . The top beam 11 of the C-ring structure 1 and the two side beams of the V-shaped support structure 2 form an approximately triangular structure. The left side beam of structure 2 forms an approximately triangular structure, and the right side plate support plate 12 of C-ring structure 1, the right half of the bottom beam 13 and the right side beam of V-shaped support structure 2 also form an approximately triangular structure Structure.

In FIG. 2 b , the two ends of the V-shaped support structure 2 are simultaneously fixed to the top beam 11 as an example, and the two ends of the V-shaped support structure 2 are respectively fixed to the ends of the top beam 11 . The top beam 11 of the C-ring structure 1 and the two side beams of the V-shaped support structure 2 form an approximately triangular structure. The left side beam of structure 2 forms an approximately triangular structure, and the right side plate support plate 12 of C-ring structure 1, the right half of the bottom beam 13 and the right side beam of V-shaped support structure 2 also form an approximately triangular structure Structure.

Therefore, the quadrangular C-ring structure 1 is divided into three triangles by the V-shaped support structure 2 . Due to the stability of the triangles, the stability of the C-ring structure 1 increases, thereby increasing the overall torsional rigidity of the vehicle.

Since the torsional stiffness mode is calculated by the torsional stiffness, when the torsional stiffness of the vehicle increases, the torsional stiffness mode of the vehicle also increases. The torsional stiffness mode is closely related to the NHV problem of the car, because increasing the torsional stiffness mode of the car reduces the NHV problem of the car, and improves the noise, vibration and stability of the car.

Specifically, as shown in FIG. 3 , along the extension direction of the side beams of the V-shaped support structure 2 , at the cutting surface on the L side, its cross section is corrugated. Its corrugated cross-section makes the V-shaped support structure 2 have higher support strength and bending rigidity, and the V-shaped support structure 2 is less likely to break or deform when it is impacted.

Specifically, as shown in FIG. 4 , in order to prevent cracking of the knuckle portion K under stress, a reinforcing plate 3 may also be provided on the V-shaped support structure 2 . The reinforcing plate 3 is arranged on the side of the corner part K away from the bottom beam 13 , and is used to strengthen the connection between the V-shaped support structure 2 and the C-ring structure 1 . And the reinforcing plate 3 and the corner part K are fixed to the bottom beam 13 through the first connecting piece 4 . Wherein, the first connecting member 4 may be a first bolt. At the corresponding position, the reinforcing plate 3 is provided with a first installation hole 31 , the corner part K is provided with a second installation hole 21 , and the bottom beam 13 is provided with a third installation hole (not shown here). Pass the first bolt through the first installation hole 31 , the second installation hole 21 and the third installation hole in sequence, and cooperate with the thread in the hole to achieve the effect of installation and fastening. And the quantity of the first connecting piece 4 can be two, correspondingly, the quantity of the first mounting hole 31, the second mounting hole 21 and the 3rd mounting hole is also two, to prevent that there is only one mounting hole and the connecting piece , leading to the problem that the mounting hole is loaded too much and cannot bear it.

In addition, as shown in FIG. 5 , both ends of the V-shaped support structure 2 are fixed to the corresponding side plate support plates 12 through the second connecting piece 5 . The second connecting piece 5 can be a second bolt, and a fourth installation hole 22 is provided at a corresponding position of the end of the V-shaped support structure 2 , and a fifth installation hole is provided at a corresponding position of the side plate support plate 12 . Make the second bolt pass through the fourth installation hole 22 and the fifth installation hole in sequence, and cooperate with the thread in the hole, so that both ends of the V-shaped support structure 2 are fixedly connected with the C-ring structure 1 .

It should be understood that the end of the V-shaped support structure 2 can also be fixed to the top beam 11 through the second connecting piece 5 . When the end of the V-shaped support structure 2 can also be fixed to the top crossbeam 11 through the second connecting piece 5 , fifth mounting holes are provided at both ends of the top crossbeam 11 . Make the second bolt pass through the fourth installation hole 22 and the fifth installation hole in sequence, and cooperate with the thread in the hole, so that both ends of the V-shaped support structure 2 are fixedly connected with the C-ring structure 1 .

It should be noted that the number of the second connecting parts 5 may be three, and the corresponding number of mounting holes is three. And the installation positions of the three connecting pieces can be distributed in a triangle, so that the load on the V-shaped support structure 2 can be evenly borne by the three bolts and the installation holes. As shown in FIG. 4 , the two mounting holes provided by the embodiment of the present application are located on a straight line where the side plate support plate 12 is located, and the third mounting hole is set away from this straight line, thereby forming a triangular shape.

The embodiment of the present application also provides a car, which includes a car body and the above-mentioned car frame structure, and the C-ring structure 1 is fixed at the rear of the car body. In some test experiments, it can be known through calculation that the torsional stiffness of the vehicle is 22.03 kN.m/deg without the V-shaped support structure 2; The torsional stiffness has been increased to 29.1kN.m/deg. In contrast, setting the V-shaped support structure 2 increases the torsional rigidity of the vehicle by about 32%. And because the top cross beam 11 place in the vehicle body can be the place where a coat rack is set, so articles such as luggage are often placed. After the V-shaped support structure 2 is provided, the V-shaped support structure 2 can resist the impact of luggage and improve the safety of luggage impact.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A car frame structure, characterized in that, comprises a C-ring structure and a V-shaped support structure; The C-ring structure includes two opposite side plate support plates, a top beam connected to the tops of the two side plate support plates, and a bottom beam connected between the bottoms of the two side plate support plates; The two ends of the V-shaped support structure are respectively fixed to the two side plate support plates or to the top beam at the same time, and the knuckles of the V-shaped support structure are fixed to the bottom beam. 2. The automobile frame structure according to claim 1, characterized in that, along the extension direction of the V-shaped support structure, the cross-section of the V-shaped support structure is corrugated. 3. The automobile frame structure according to claim 1, further comprising a reinforcement plate, the reinforcement plate being arranged on the side of the corner part away from the bottom beam; the reinforcement plate, the corner part It is fixed to the bottom cross beam through the first connecting piece. 4. The automobile frame structure according to claim 3, wherein the first connecting member is a first bolt, the reinforcement plate is provided with a first installation hole, and the knuckle part is provided with a second installation hole , the bottom beam is provided with a third mounting hole; the first bolt passes through the first mounting hole in turn, and the second mounting hole is screwed into the third mounting hole. 5. The automobile frame structure according to claim 3, characterized in that, the number of the first connecting parts is two. 6. The automobile frame structure according to claim 1, wherein the end of the V-shaped support structure is fixed to the corresponding side plate support plate through a second connecting piece; or, the V-shaped support structure The end part of is fixed to the top beam through the second connecting piece. 7. The automobile frame structure according to claim 6, wherein the second connecting member is a second bolt, and the end of the V-shaped support structure is provided with a fourth mounting hole; When the end of the V-shaped support structure is fixed to the corresponding side plate support plate through the second connecting piece, the fifth mounting hole is arranged on the side plate support plate; the second bolt passes through the The fourth mounting hole is threadedly matched with the fifth mounting hole; When the end of the V-shaped support structure is fixed to the top beam through the second connecting piece, the two ends of the top beam are provided with fifth installation holes; the second bolts pass through the fourth installation holes in turn It is threadedly matched with the fifth installation hole. 8 . The automobile frame structure according to claim 7 , characterized in that, between each set of side plate support plates corresponding to each other and the ends of the V-shaped support structure, the number of the second connecting pieces is three. 9. The automobile frame structure according to claim 8, characterized in that, the three second connecting members are distributed in a triangular shape. 10. An automobile, characterized in that it comprises a car body and the automobile frame structure according to any one of claims 1-9; The C-ring structure is fixed to the rear of the vehicle body.

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