Car body side wall rear assembly structure

Abstract

The utility model discloses a vehicle body side wall rear assembly structure which comprises a C column beam, a D column beam, a wheel cover beam, a CD column connecting beam, a C column inclined supporting beam, a rear D column inclined supporting beam, a rear door opening outer upper seam allowance and a rear door opening inner upper seam allowance. The C-column beam, the D-column beam, the wheel cover beam, the CD-column connecting beam, the C-column inclined supporting beam, the rear D-column inclined supporting beam, the rear door opening outer upper seam allowance and the rear door opening inner upper seam allowance are of an integrated die-casting side wall rear assembly overall structure, and a vertically-through reinforcing structure is arranged on the rear side of the side wall rear assembly. The local thickness of the die casting can be designed as required, and the optimal balance between weight and performance can be achieved; the reinforcing structure is reasonable in design, and the structural strength and the collision safety performance are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle body structures, in particular to a vehicle body side enclosure rear assembly structure. Background Art

[0002] As one of the important parts of the passenger compartment of an electric vehicle, the rear side assembly structure needs to have a certain rigidity and strength to withstand various forces and moments from outside and inside the vehicle. Secondly, it needs to be coordinated with other body structures such as the front assembly and the bottom assembly to ensure the overall appearance and safety of the vehicle body, and plays a key role in the sealing and NVH of the passenger compartment. The traditional rear side assembly structure is composed of multiple steel stampings or aluminum stampings and aluminum profiles. There is a large structural overlap at the joints between the parts, which leads to increased weight. The various structures need to be connected together by welding or riveting, and the joints need to be sealed with special glue. The process is complicated and the sealing is poor, which affects the NVH performance of the vehicle and does not meet the requirements of energy conservation and environmental protection.

[0003] The CD column of the aluminum frame body structure is generally composed of the C column beam, D column beam, wheel cover beam, CD column connecting beam, C column diagonal brace beam, rear D column diagonal brace beam, rear door hole outer upper stop, rear door hole inner upper stop and other structural splicing. It can be welded steel stamping parts, or riveted between steel and aluminum stamping parts and profiles. There are overlaps between parts, which increases the weight. The connection between parts requires increased connection process investment. The overlap seams need to be sealed with glue. The stamping parts and profile parts must be of equal thickness, which is not conducive to the balanced design of performance and weight. Figure 2 As shown, the rear part assembly 100 of the traditional automobile body side panel is formed by connecting the traditional C-pillar beam 101, the traditional D-pillar beam, the traditional C-pillar upper inner plate 103, the traditional tailgate inner rear stop assembly 104, the traditional D-pillar upper support beam 105, the traditional CD-pillar middle connecting beam 106, the traditional D-pillar lower support beam 107, the traditional side panel rear wheel cover support beam rear section 108, the traditional side panel rear wheel cover beam 109, the traditional rear door lock mounting reinforcement plate 110 and other parts together by welding.

[0004] In order to solve the above problems, the body side panel structure currently also adopts an integrated die-casting structure; for example, Chinese patent CN218172398U discloses a body rear side panel structure and a car, the body rear side panel structure includes a rear side panel inner panel and a plurality of reinforcing ribs distributed on the rear side panel inner panel, the rear side panel inner panel and the reinforcing ribs are both made of aluminum alloy, and the two are formed by integrated die-casting; it is only reinforced by a group of small convex rib structures, and the collision safety performance and structural stiffness performance need to be improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a vehicle body side rear assembly structure to achieve the purpose of improving structural strength and collision safety performance.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] The rear assembly structure of the body side panel includes a C-pillar beam, a D-pillar beam, a wheel housing beam, a CD-pillar connecting beam, a C-pillar diagonal brace beam, a rear D-pillar diagonal brace beam, an outer upper stopper of the rear door opening, and an inner upper stopper of the rear door opening. The C-pillar beam, D-pillar beam, wheel housing beam, CD-pillar connecting beam, C-pillar diagonal brace beam, rear D-pillar diagonal brace beam, an outer upper stopper of the rear door opening, and an inner upper stopper of the rear door opening are an integral die-cast rear assembly structure of the side panel. The rear side of the rear assembly of the side panel is provided with a reinforcing structure penetrating up and down.

[0008] Further:

[0009] The one-piece die-cast side panel rear assembly is an one-piece die-cast aluminum alloy structure.

[0010] The minimum thickness of the one-piece die-cast side panel rear assembly is controlled at 1-1.5 mm.

[0011] The die-casting tonnage of the one-piece die-cast side panel rear assembly is above 6500 tons.

[0012] The front part of the one-piece die-cast side rear assembly forms a side rear assembly front joint structure, the rear part of the one-piece die-cast side rear assembly forms a side rear assembly rear joint structure, and the lower part of the one-piece die-cast side rear assembly forms a side rear assembly rear wheel cover structure.

[0013] The die-casting pressure of the one-piece die-cast side rear assembly is above 30 MPa.

[0014] The rear joint structure of the side panel rear assembly includes an upper rear joint structure of the side panel rear assembly and a lower rear joint structure of the side panel rear assembly, and the upper and lower penetrating reinforcement structure is arranged between the upper rear joint structure of the side panel rear assembly and the lower rear joint structure of the side panel rear assembly.

[0015] A group of reinforcing rib structures are provided at the edge of the rear wheel cover structure of the side enclosure rear assembly.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The rear assembly structure of the body side is reasonably designed. The C-pillar beam, D-pillar beam, wheel arch beam, CD-pillar connecting beam, C-pillar diagonal brace beam, rear D-pillar diagonal brace beam, rear door opening outer upper stop and rear door opening inner upper stop are integrated into one-piece die-casting to form an one-piece die-cast side panel structure. The local thickness of the die-casting can be designed as required to achieve the best balance between weight and performance; the reinforced structural design is reasonable to effectively improve the structural strength and collision safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a schematic diagram of the rear assembly structure of the side panel of the utility model.

[0020] Figure 2 It is a schematic diagram of the existing side panel rear assembly structure.

[0021] In the figure:

[0022] 200. One-piece die-cast side panel rear assembly, 201. Side panel rear assembly front joint structure, 202. Side panel rear assembly rear upper joint structure, 203. Side panel rear assembly body, 204. Side panel rear assembly rear wheel cover structure, 205. Side panel rear assembly rear lower joint structure, 206. Reinforcement structure. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the rear body side assembly structure is an integral die-cast structure, which includes a C-pillar beam, a D-pillar beam, a wheel arch beam, a CD-pillar connecting beam, a C-pillar diagonal brace beam, a rear D-pillar diagonal brace beam, an outer upper stopper of the rear door opening, and an inner upper stopper of the rear door opening.

[0025] In the utility model, the C-pillar beam, D-pillar beam, wheel arch beam, CD-pillar connecting beam, C-pillar diagonal brace beam, rear D-pillar diagonal brace beam, rear door opening outer upper stop and rear door opening inner upper stop are integrally die-cast to form an integral die-cast side rear assembly 200 overall structure, and the rear side of the side rear assembly is provided with a reinforcing structure 206 penetrating from top to bottom.

[0026] Furthermore, the one-piece die-cast side panel rear assembly 200 is an one-piece die-cast structure of aluminum alloy; the alloy elements of the side panel rear assembly body 203 can be one or a combination of several of magnesium, copper, silicon, and manganese, and the alloy content can be between 3% and 15%. If multiple elements are alloyed, the total content generally does not exceed 15%. The tensile strength of this material is 280-350Mpa, the yield strength is 150-210Mpa, and the elongation is 10%-16%. The products after die-casting of this material do not need to be heat treated.

[0027] According to the structural form of the rear assembly of the side panel, the high-pressure vacuum casting process is adopted. The technical characteristics of high-pressure vacuum casting are that it can form relatively complex structures and thin-walled structures, with a minimum thickness of 1mm to 1.5mm. The tonnage of the press used for die casting must be above 6500T, and the pressure during die casting must be above 30Mpa. The products after die casting using the multi-element alloy aluminum material that does not require heat treatment meet the requirements in terms of strength and ductility, and do not require heat treatment and subsequent shaping.

[0028] The front part of the one-piece die-cast side rear assembly forms a side rear assembly front joint structure 201, the rear part of the one-piece die-cast side rear assembly forms a side rear assembly rear joint structure, and the lower part of the one-piece die-cast side rear assembly forms a side rear assembly rear wheel cover structure 204.

[0029] Furthermore,

[0030] The rear joint structure of the side enclosure rear assembly includes the rear upper joint structure 202 of the side enclosure rear assembly and the rear lower joint structure 205 of the side enclosure rear assembly. The reinforcing structure penetrating from top to bottom is arranged between the rear upper joint structure of the side enclosure rear assembly and the rear lower joint structure of the side enclosure rear assembly. A group of reinforcing rib structures are arranged at the edge of the rear wheel cover structure of the side enclosure rear assembly. The reinforcing structure is reasonably designed to effectively improve the structural strength and collision safety performance.

[0031] The technical solution adopted by the utility model is to integrate the C-pillar beam, D-pillar beam, wheel cover beam, CD-pillar connecting beam, C-pillar diagonal brace beam, rear D-pillar diagonal brace beam, rear door opening outer upper stop, rear door opening inner upper stop and other structures into a whole according to the die-casting process, using heat-treatment-free materials such as aluminum silicon magnesium manganese, and forming them in one piece through high-pressure casting. Its structural features cover the main features of the above-mentioned traditional parts structure. During the structural design process, the structural thickness of different areas can be freely designed according to needs, and the surrounding parts can be effectively connected. The horizontal and vertical beam structures such as wheel cover beams and D-pillar beams can freely arrange the position and thickness of the reinforcing ribs according to their function and performance requirements, so as to achieve the best balance between performance and weight.

[0032] The above is only an explanation of the preferred embodiments of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0033] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A rear body side assembly structure, comprising a C-pillar beam, a D-pillar beam, a wheel house beam, a CD-pillar connecting beam, a C-pillar diagonal brace beam, a rear D-pillar diagonal brace beam, an outer upper stopper of a rear door opening, and an inner upper stopper of a rear door opening, characterized in that: The C-pillar beam, D-pillar beam, wheel arch beam, CD-pillar connecting beam, C-pillar diagonal brace beam, rear D-pillar diagonal brace beam, rear door opening outer upper stop and rear door opening inner upper stop are an integral die-cast side panel rear assembly structure, and the rear side of the side panel rear assembly is provided with a reinforcing structure penetrating from top to bottom.

2. The vehicle body side rear assembly structure as claimed in claim 1, characterized in that: The one-piece die-cast side panel rear assembly is an one-piece die-cast structure of aluminum alloy.

3. The vehicle body side rear assembly structure as claimed in claim 1, characterized in that: The minimum thickness of the one-piece die-cast side panel rear assembly is controlled at 1-1.5 mm.

4. The vehicle body side rear assembly structure as claimed in claim 1, characterized in that: The die-casting tonnage of the one-piece die-cast side panel rear assembly is above 6500 tons.

5. The vehicle body side rear assembly structure as claimed in claim 1, characterized in that: The front part of the one-piece die-cast side rear assembly forms a side rear assembly front joint structure, the rear part of the one-piece die-cast side rear assembly forms a side rear assembly rear joint structure, and the lower part of the one-piece die-cast side rear assembly forms a side rear assembly rear wheel cover structure.

6. The vehicle body side rear assembly structure as claimed in claim 4, characterized in that: The die-casting pressure of the one-piece die-cast side rear assembly is above 30 MPa.

7. The vehicle body side rear assembly structure as claimed in claim 5, characterized in that: The rear joint structure of the side panel rear assembly includes an upper rear joint structure of the side panel rear assembly and a lower rear joint structure of the side panel rear assembly, and the upper and lower penetrating reinforcement structure is arranged between the upper rear joint structure of the side panel rear assembly and the lower rear joint structure of the side panel rear assembly.

8. The vehicle body side rear assembly structure as claimed in claim 5, characterized in that: A group of reinforcing rib structures are provided at the edge of the rear wheel cover structure of the side enclosure rear assembly.

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