Reinforcing structure for D column of hatchback type back door

Abstract

The invention provides a hatchback type back door D column reinforcing structure which comprises a D column inner plate assembly, a rear top beam connecting plate and a D column lower reinforcing connecting plate, an inclined plane part is arranged on the lower portion of the rear top beam connecting plate and gradually gets close to the D column inner plate assembly, and the lower end of the inclined plane part is attached to and fixedly connected with the rear side face of the D column inner plate assembly; weight reduction intervals are arranged between the lower end of the D-column lower reinforcing connecting plate and the upper end of the D-column lower reinforcing connecting plate and between the lower end of the rear top beam connecting plate and the upper end of the D-column lower reinforcing connecting plate. On the premise that the overall performance of an original D column part structure is not reduced, the weight of a metal plate is reduced, and the weight utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of automobile bodies, and in particular to a D-pillar reinforcement structure for a hatchback rear door. Background Art

[0002] Since the weight of a car is highly correlated with its safety, endurance and cost, the automotive industry has put forward more stringent requirements on the effective weight of sheet metal in the face of an increasingly competitive market. The D-pillar inner panel assembly of the hatchback rear door of existing models is usually connected to a rear top beam connecting plate and a D-pillar lower reinforcement connecting plate. The lower end of the rear top beam connecting plate is fixedly connected to the upper end of the D-pillar lower reinforcement connecting plate, and is matched with the D-pillar inner panel assembly to form a reinforcement cavity. However, the existing roof cover rear top beam connecting plate and D-pillar lower reinforcement connecting plate have a large overall length, resulting in a large weight of the overall assembly structure, which is not conducive to the lightweight design of the vehicle body. Therefore, it is necessary to invent a new hatchback rear door D-pillar reinforcement structure. Summary of the invention

[0003] The object of the present invention is to provide a D-pillar reinforcement structure for a hatchback rear door, which can reduce the weight of sheet metal and improve the weight utilization rate without reducing the overall performance of the original D-pillar structure.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A hatchback rear door D-pillar reinforcement structure comprises a D-pillar inner panel assembly, a rear top beam connecting plate, and a D-pillar lower reinforcement connecting plate, wherein the lower portion of the rear top beam connecting plate is provided with an inclined portion, the inclined portion gradually approaches the D-pillar inner panel assembly, and the lower end of the inclined portion is abutted against and fixedly connected to the rear side surface of the D-pillar inner panel assembly; the D-pillar lower reinforcement connecting plate, a weight reduction spacing is provided between the lower end of the rear top beam connecting plate and the upper end of the D-pillar lower reinforcement connecting plate.

[0006] Preferably, in combination with the above solution, the rear top beam connecting plate is fixedly connected to the D-pillar inner panel assembly to form a first reinforcement cavity inside.

[0007] Preferably, in combination with the above solution, the D-pillar lower reinforcement connecting plate is fixedly connected to the D-pillar inner panel assembly to form a second reinforcement cavity inside.

[0008] Preferably, in combination with the above solution, a reinforcement support plate is fixedly connected to the upper opening of the second reinforcement cavity.

[0009] Preferably, in combination with the above solution, a first weight-reducing hole is provided on the reinforced support plate.

[0010] Preferably, in combination with the above solution, one end of the reinforcing support plate is fixedly connected to the rear side of the D-pillar inner panel assembly, and the other end of the reinforcing support plate is fixedly connected to the front side of the D-pillar lower reinforcing connecting plate.

[0011] Preferably, in combination with the above scheme, the front end of the reinforcing support plate is bent upward to provide a front fixed edge, and the rear end of the reinforcing support plate is bent downward to provide a rear fixed edge, the front fixed edge is fixedly connected to the rear side surface of the D-pillar inner panel assembly, and the rear fixed edge is fixedly connected to the front side surface of the reinforcing connecting plate under the D-pillar.

[0012] Preferably, in combination with the above solution, a rear door hinge mounting point is provided on the upper portion of the rear top beam connecting plate.

[0013] Preferably, in combination with the above solution, an electric support rod mounting point is provided on the rear side surface of the rear top beam connecting plate.

[0014] Preferably, in combination with the above solution, a plurality of groups of second weight-reducing holes are provided on the rear top beam connecting plate, and a plurality of groups of third weight-reducing holes are provided on the D-pillar lower reinforcement connecting plate.

[0015] Beneficial effects of the present invention: The present invention shortens the overall sheet metal length of the rear top beam connecting plate and the D-pillar lower reinforcing connecting plate by redesigning the rear top beam connecting plate and the D-pillar lower reinforcing connecting plate at the D-pillar position, and through a reasonable connection structure, not only can the overall structural strength be ensured, but also the redundant weight of the sheet metal can be effectively reduced, which can reduce material costs and production costs without affecting other structures of the vehicle body.

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a diagram of a D-pillar reinforcement structure of a hatchback rear door.

[0018] Figure 2 This is a structural diagram of a D-pillar reinforcement structure of a hatchback rear door in another direction of the present invention.

[0019] Figure 3 It is a partial structural exploded view of a D-pillar reinforcement structure of a hatchback rear door according to the present invention.

[0020] Figure 4 The present invention is a front view of a D-pillar reinforcement structure of a hatchback rear door.

[0021] Figure 5 for Figure 4 AA cross-section diagram.

[0022] Figure 6 for Figure 4 BB cross-section diagram.

[0023] Figure 7 It is a structural diagram of the rear top beam connecting plate in the present invention.

[0024] Figure 8 It is a structural diagram of the D-pillar lower reinforcement connecting plate in the present invention.

[0025] Fig. 9 It is a structural diagram of the reinforced support plate in the present invention. DETAILED DESCRIPTION

[0026] like Figures 1 to 4 The D-pillar reinforcement structure of a hatchback rear door shown in the figure comprises a D-pillar inner panel assembly 1 arranged on the left and right sides of the vehicle body, two groups of rear top beam connecting plates 2 connected to the D-pillar inner panel assembly 1, and two groups of D-pillar lower reinforcement connecting plates 3, the upper part of the rear top beam connecting plate 2 is fixed to the rear top beam assembly 5 by welding, and the lower part of the D-pillar lower reinforcement connecting plate 3 is fixed to the rear enclosure assembly 6 by welding. The D-pillar inner panel assembly 1 is still a traditional structure, and there is no structural change in this embodiment.

[0027] The lower part of the rear top beam connecting plate 2 is provided with an inclined portion 21, and the inclined portion 21 gradually tilts toward the D-pillar inner panel assembly 1, so that the cavity width between the D-pillar inner panel assembly 1 and the rear top beam connecting plate 2 gradually decreases from top to bottom, until the lower fixed edge of the inclined portion 21 is attached to the rear side surface of the D-pillar inner panel assembly 1 and fixedly connected by welding; the D-pillar lower reinforcement connecting plate 3, a weight reduction spacing is provided between the lower end of the rear top beam connecting plate 2 and the upper end of the D-pillar lower reinforcement connecting plate 3. There is a weight reduction spacing of about one-third of the height between the rear top beam connecting plate 2 and the D-pillar lower reinforcement connecting plate 3, and only the sheet metal part of the D-pillar inner panel assembly 1 is between the weight reduction spacing, which can reduce the weight of the D-pillar structure.

[0028] In order to increase the structural rigidity of the upper part of the D-pillar, such as Figure 5 As shown, the rear top beam connecting plate 2 is fixedly connected to the D-pillar inner panel assembly 1 by welding to form a first reinforcement cavity 10 inside.

[0029] In order to increase the structural rigidity of the lower part of the D-pillar, such as Figure 6 As shown, the D-pillar lower reinforcement connecting plate 3 is fixedly connected to the D-pillar inner panel assembly 1 by welding to form a second reinforcement cavity 20 inside.

[0030] In order to increase the structural rigidity of the upper end cavity opening portion of the D-pillar lower reinforcement connecting plate 3 and the D-pillar inner panel assembly 1 , a reinforcement support plate 4 is fixedly connected to the upper end opening of the second reinforcement cavity 20 .

[0031] In order to achieve lightweight design, Fig. 9As shown, the reinforcing support plate 4 is provided with a first weight-reducing hole 43. In order to facilitate positioning during welding, the reinforcing support plate 4 is also provided with two groups of welding positioning holes 44.

[0032] In order to better fix the reinforcing support plate 4 to the surrounding parts, one end of the reinforcing support plate 4 is fixedly connected to the rear side of the D-pillar inner panel assembly 1 by welding, and the other end of the reinforcing support plate 4 is fixedly connected to the front side of the reinforcing connecting plate 3 under the D-pillar by welding.

[0033] In order to strengthen the connection between the support plate 4 and the surrounding parts more firmly, Fig. 9 As shown, the front end of the reinforcing support plate 4 is bent upward to provide a front fixed edge 41, and the rear end of the reinforcing support plate 4 is bent downward to provide a rear fixed edge 41, the front fixed edge 41 is fixedly connected to the rear side of the D-pillar inner panel assembly 1, and the rear fixed edge 41 is fixedly connected to the front side of the D-pillar lower reinforcing connecting plate 3.

[0034] To facilitate the assembly of the back door hinge, Figure 7 As shown, a tailgate hinge mounting point 22 is provided on the upper portion of the rear top beam connecting plate 2. The tailgate hinge mounting point 22 is provided with a boss structure and a mounting hole to increase structural rigidity and facilitate assembly of the tailgate hinge.

[0035] To facilitate the assembly of the electric support rod for the back door, Figure 7 As shown, an electric support rod mounting point 23 is provided on the rear side surface of the rear top beam connecting plate 2. The electric support rod mounting point 23 is also provided with a boss structure and a mounting hole to increase the structural rigidity and facilitate the assembly of the electric support rod of the rear door.

[0036] In order to achieve lightweight design, Figure 8 As shown, a plurality of groups of second weight-reducing holes 24 are provided on the rear top beam connecting plate 2, and a plurality of groups of third weight-reducing holes 31 are provided on the D-pillar lower reinforcement connecting plate 3.

[0037] The rear top beam connecting plate 2 and the D-pillar lower reinforcing connecting plate 3 on the traditional hatchback rear door are welded to each other and connected into an integral structure. Due to the large overall length of the sheet metal, the weight also becomes larger. However, on the basis of the unchanged thickness of the original material, the rear top beam connecting plate 2 is cut off at the upper third of the D-pillar, and only the upper half of the rear top beam connecting plate 2 is retained. At the same time, the rear top beam connecting plate 2 and the inner plate body are added with an inclined overlap structure, and the opening is changed to a closed structure, and a partition can also be used to seal and connect by resistance welding. And the D-pillar lower reinforcing connecting plate 3 is cut off at the lower third of the D-pillar, and only the lower half of the D-pillar lower reinforcing connecting plate 3 is retained. At the same time, the D-pillar lower reinforcing connecting plate 3 and the D-pillar inner plate assembly 1 are added with an overlap structure, and the opening is changed to a reinforcing support plate 4 to seal, and a closed structure can also be used, and connected by resistance welding. After CAE software calculation in the early stage and actual vehicle testing in the later stage, this scheme can meet the original design performance requirements, will not affect the overall rigidity of the D-pillar, and can significantly reduce the weight of the D-pillar structure.

[0038] In the description of the present invention, it is necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "bottom", "inside", "outside", "one end", "one side", "two ends", "both sides", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements made by adopting the method concept and technical solution of the present invention, or directly applied to other occasions, they all fall within the protection scope of the present invention.

Claims

1. A D-pillar reinforcement structure for a hatchback rear door, comprising a D-pillar inner panel assembly (1), a rear top beam connecting plate (2), and a D-pillar lower reinforcement connecting plate (3), wherein: The lower part of the rear top beam connecting plate (2) is provided with an inclined portion (21), the inclined portion (21) gradually approaches the D-pillar inner panel assembly (1), and the lower end of the inclined portion (21) is in contact with and fixedly connected to the rear side surface of the D-pillar inner panel assembly (1); the D-pillar lower reinforcement connecting plate (3), a weight reduction spacing is provided between the lower end of the rear top beam connecting plate (2) and the upper end of the D-pillar lower reinforcement connecting plate (3).

2. The hatchback rear door D-pillar reinforcement structure according to claim 1, characterized in that: After the rear top beam connecting plate (2) is fixedly connected to the D-pillar inner plate assembly (1), a first reinforcement cavity (10) is formed inside.

3. The hatchback rear door D-pillar reinforcement structure according to claim 1, characterized in that: After the D-pillar lower reinforcement connecting plate (3) is fixedly connected to the D-pillar inner plate assembly (1), a second reinforcement cavity (20) is formed inside.

4. The hatchback rear door D-pillar reinforcement structure according to claim 3, characterized in that: A reinforcement support plate (4) is fixedly connected to the upper opening of the second reinforcement cavity (20).

5. The hatchback rear door D-pillar reinforcement structure according to claim 4, characterized in that: The reinforcing support plate (4) is provided with a first weight-reducing hole (43).

6. The hatchback rear door D-pillar reinforcement structure according to claim 4, characterized in that: One end of the reinforcing support plate (4) is fixedly connected to the rear side of the D-pillar inner plate assembly (1), and the other end of the reinforcing support plate (4) is fixedly connected to the front side of the D-pillar lower reinforcing connecting plate (3).

7. The hatchback rear door D-pillar reinforcement structure according to claim 6, characterized in that: The front end of the reinforcing support plate (4) is bent upward to provide a front fixed edge (41), and the rear end of the reinforcing support plate (4) is bent downward to provide a rear fixed edge (41), the front fixed edge (41) is fixedly connected to the rear side surface of the D-pillar inner panel assembly (1), and the rear fixed edge (41) is fixedly connected to the front side surface of the D-pillar lower reinforcing connecting plate (3).

8. The hatchback rear door D-pillar reinforcement structure according to claim 1, characterized in that: A rear door hinge mounting point (22) is arranged on the upper portion of the rear top beam connecting plate (2).

9. The hatchback rear door D-pillar reinforcement structure according to claim 1, characterized in that: An electric support rod mounting point (23) is provided on the rear side surface of the rear top beam connecting plate (2).

10. The hatchback rear door D-pillar reinforcement structure according to claim 1, characterized in that: A plurality of groups of second weight-reducing holes (24) are arranged on the rear top beam connection plate (2), and a plurality of groups of third weight-reducing holes (31) are arranged on the D-pillar lower reinforcement connection plate (3).

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