Plastic back door inner panel and automobile back door

Abstract

The application provides a plastic back door inner plate, which belongs to the technical field of automobile parts and components and comprises an inner plate main frame, longitudinal beams arranged in the inner plate main frame, the number of the longitudinal beams being at least two, transverse beams arranged in the inner plate main frame, the number of the transverse beams being at least two, and the longitudinal beams and the transverse beams being arranged in a cross manner. The application also provides an automobile back door which comprises the plastic back door inner plate and further comprises a plastic back door outer plate connected with the plastic back door inner plate. The plastic back door inner plate has the beneficial effects that the longitudinal beams and the transverse beams are connected with the inner plate main frame, the transverse beams can effectively improve the lateral stiffness and the torsional stiffness of the plastic back door inner plate, the longitudinal beams can effectively improve the bending stiffness of the plastic back door inner plate, and the overall stiffness of the plastic back door inner plate can be effectively improved under the action of the longitudinal beams and the transverse beams in two different directions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile parts, and relates to a plastic back door inner plate and an automobile back door. BACKGROUND

[0002] The automobile all-plastic back door is a process in which a plastic product is used to replace the traditional metal door inner and outer decoration process in the market in recent years, and has been gradually accepted by some customers and is being accepted by more customers. The automobile plastic back door will be the future trend in terms of lightweight, cost, safety and design flexibility. With the further maturity of the process technology, the balance point of weight and safety is grasped, and it is completely feasible to use plastic to replace metal on the body outer decoration. In China, the research, design and manufacturing of the automobile plastic all-plastic back door are still in the initial stage, so there are still some defects in the existing plastic back door, and the most important problem is how to ensure that the plastic back door structure has sufficient strength while achieving significant weight reduction, and avoid losing necessary safety due to excessive weight reduction.

[0003] For example, a utility model patent with the application number CN201520499210.X provides a door structure, which comprises a metal support, a plastic inner door plate and a plastic outer door plate. The plastic inner door plate and the plastic outer door plate are arranged on the two sides of the metal support, and the metal support is annular and located at the edge of the plastic inner door plate and the plastic outer door plate.

[0004] In summary, although some existing technical solutions use plastic inner door plates and plastic outer door plates to solve the problem of door weight reduction, the metal support is used to ensure the strength, so the door is still relatively heavy and has a large room for improvement. SUMMARY

[0005] The application aims to solve the above problems in the prior art, and provides a plastic back door inner plate and an automobile back door.

[0006] The purpose of the application can be achieved by the following technical solutions: a plastic back door inner plate, comprising:

[0007] An inner plate main frame;

[0008] A longitudinal beam arranged in the inner plate main frame, the number of the longitudinal beams is at least two;

[0009] A transverse beam arranged in the inner plate main frame, the number of the transverse beams is at least two, the longitudinal beams and the transverse beams are arranged in cross, and adjacent two longitudinal beams and adjacent two transverse beams surround a weight reduction hole.

[0010] In the plastic back door inner panel, the longitudinal beams and the transverse beams are bent towards the same side of the lightening hole to extend the side wall of the lightening hole and form a reinforcing part.

[0011] In the plastic back door inner panel, the inner panel main frame, the longitudinal beams, the transverse beams and the reinforcing part are integrally formed.

[0012] In the plastic back door inner panel, the end of the reinforcing part is formed with a flange for improving the strength thereof.

[0013] In the plastic back door inner panel, the end of the reinforcing part is provided with a glue part for connecting with a plastic back door outer panel.

[0014] In the plastic back door inner panel, the longitudinal beams and the transverse beams are arranged in a grid shape to form a rectangular array of the lightening holes.

[0015] Secondly, the plastic back door comprises the plastic back door inner panel and a plastic back door outer panel connected with the plastic back door inner panel.

[0016] In the plastic back door, a deformation space is formed between the plastic back door inner panel and the plastic back door outer panel.

[0017] Compared with the prior art, the plastic back door inner panel has the following advantages:

[0018] 1. The longitudinal beams and the transverse beams are connected with the inner panel main frame, the transverse beams can effectively improve the lateral stiffness and the torsional stiffness of the plastic back door inner panel, the longitudinal beams can effectively improve the bending stiffness of the plastic back door inner panel, and the overall stiffness of the plastic back door inner panel can be effectively improved under the action of the longitudinal beams and the transverse beams in two different directions.

[0019] 2. The plastic back door inner panel does not need to be thickened as a whole, but only the longitudinal beams and the transverse beams are bent towards the same side of the lightening hole to extend the side wall of the lightening hole and form a reinforcing part, so that the strength of the lightening hole position can be further increased.

[0020] 3. The inner panel main frame, the longitudinal beams, the transverse beams and the reinforcing part are integrally formed, instead of being manufactured separately and then fixedly connected, so that the overall structure is not easy to be broken due to the connection relationship.

[0021] 4. The end of the reinforcing part is formed with a flange, the flange can improve the strength around the end of the reinforcing part, prevent the end of the reinforcing part from cracking, and slow down the stress concentration problem of the reinforcing part.

[0022] 5. The end of the reinforcing part is provided with an adhesive part for connecting with the outer plastic tailgate panel. The inner plastic tailgate panel is bonded to the outer plastic tailgate panel through the adhesive part on the end of the reinforcing part, which further increases the connection between the inner plastic tailgate panel and the outer plastic tailgate panel in a local area, effectively improving the local rigidity of the car tailgate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the car tailgate of the present invention.

[0024] Figure 2 for Figure 1 A schematic diagram of the AA cross-section.

[0025] In the diagram, 100 is the main frame of the inner panel; 200 is the longitudinal beam; 300 is the transverse beam; 400 is the weight-reducing hole; 410 is the reinforcing part; 420 is the flange; 430 is the adhesive part; and 500 is the plastic back door outer panel. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but the combination of the technical solutions should be considered not to exist and not within the protection scope of the present application when the combination of the technical solutions cannot be realized by the ordinary skilled in the art.

[0031] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0032] As shown in Figure 1 , Figure 2 , a plastic back door inner plate comprises an inner plate main frame 100, longitudinal beams 200 and transverse beams 300.

[0033] The longitudinal beams 200 are arranged in the inner plate main frame 100, and the number of the longitudinal beams 200 is at least two, and the specific number is determined according to the size and strength requirement of the plastic back door inner plate.

[0034] The transverse beams 300 are arranged in the inner plate main frame 100, and the number of the transverse beams 300 is at least two, and the specific number is determined according to the size and strength requirement of the plastic back door inner plate, the longitudinal beams 200 and the transverse beams 300 are arranged in cross, and adjacent two longitudinal beams 200 and adjacent two transverse beams 300 surround to form a weight-reducing hole 400.

[0035] In the embodiment, the longitudinal beams 200 and the transverse beams 300 are connected with the inner plate main frame 100, the transverse beams 300 can effectively improve the lateral stiffness and torsional stiffness of the plastic back door inner plate, the longitudinal beams 200 can effectively improve the bending stiffness of the plastic back door inner plate, and under the action of the longitudinal beams 200 and the transverse beams 300 in two different directions, the overall stiffness of the plastic back door inner plate can be effectively improved.

[0036] Preferably, each of the longitudinal beams 200 and each of the transverse beams 300 are arranged in a grid shape so that each of the weight-reducing holes 400 forms a rectangular array.

[0037] As shown in Figure 1 , Figure 2 , on the basis of the above-mentioned embodiment, the longitudinal beams 200 and the transverse beams 300 are bent towards the same side of the weight-reducing hole 400 so that the side wall of the weight-reducing hole 400 is extended and a reinforcing portion 410 is formed.

[0038] In the embodiment, the strength of the position of the lightening hole 400 can be further increased by bending the longitudinal beam 200 and the transverse beam 300 towards the same side of the lightening hole 400 to extend the side wall of the lightening hole 400 and form the reinforcing portion 410 without thickening the entire plastic inner back door panel.

[0039] As shown in Figure 1 , Figure 2 , the inner panel body frame 100, the longitudinal beam 200, the transverse beam 300 and the reinforcing portion 410 are integrally formed.

[0040] In the embodiment, the inner panel body frame 100, the longitudinal beam 200, the transverse beam 300 and the reinforcing portion 410 are integrally formed instead of being separately manufactured and then fixedly connected, so that the entire structure is less likely to be broken due to the connection relationship.

[0041] As shown in Figure 1 , Figure 2 , the end of the reinforcing portion 410 is formed with a flange 420 for improving the strength thereof.

[0042] In the embodiment, the end of the reinforcing portion 410 is formed with the flange 420, which can improve the strength of the end of the reinforcing portion 410, prevent the end of the reinforcing portion 410 from being cracked and slow down the stress concentration of the reinforcing portion 410.

[0043] As shown in Figure 1 , Figure 2 , the end of the reinforcing portion 410 is provided with a bonding portion 430 for connecting with the plastic outer back door panel 500.

[0044] In the embodiment, the end of the reinforcing portion 410 is provided with the bonding portion 430 for connecting with the plastic outer back door panel 500, and the plastic inner back door panel is bonded to the plastic outer back door panel 500 through the bonding portion 430 on the end of the reinforcing portion 410, which additionally increases the connection relationship between the local area of the plastic inner back door panel and the plastic outer back door panel 500 and effectively improves the local rigidity of the back door of the automobile.

[0045] Secondly, as shown in Figure 2 , a back door of an automobile includes the plastic inner back door panel and further includes a plastic outer back door panel 500 connected with the plastic inner back door panel.

[0046] Preferably, a deformation space is formed between the plastic inner back door panel and the plastic outer back door panel 500, and when one of the plastic inner back door panel and the plastic outer back door panel 500 is stressed, the other one can be deformed in the deformation space.

Claims

1. A plastic back door inner panel, characterized in that, include: Inner panel main frame; Longitudinal beams are provided within the main frame of the inner plate, and the number of longitudinal beams is at least two; A transverse beam is provided within the main frame of the inner plate. There are at least two transverse beams. The longitudinal beams are intersected with the transverse beams. A weight-reducing hole is formed by surrounding two adjacent longitudinal beams and two adjacent transverse beams. The longitudinal beam and the transverse beam are bent toward the same side of the weight-reducing hole, thereby extending the sidewall of the weight-reducing hole and forming a reinforcement. The longitudinal beams and the transverse beams are arranged in a grid pattern to form a rectangular array of weight-reducing holes.

2. The plastic back door inner panel as described in claim 1, characterized in that: The inner plate main frame, the longitudinal beams, the transverse beams, and the reinforcing parts are integrally formed.

3. The plastic back door inner panel as described in claim 1, characterized in that: The end of the reinforcing part is formed with a flange to improve its strength.

4. The plastic back door inner panel as described in claim 1, characterized in that: The end of the reinforcing part is provided with an adhesive part for connecting with the outer panel of the plastic back door.

5. A car tailgate, characterized in that, The device includes the plastic back door inner panel as described in any one of claims 1-4, and further includes a plastic back door outer panel, wherein the plastic back door outer panel is connected to the plastic back door inner panel.

6. A car tailgate as described in claim 5, characterized in that: A deformation space is formed between the inner panel of the plastic back door and the outer panel of the plastic back door.

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