CN111845949B

CN111845949B - Automobile top cover assembly, manufacturing and assembling method of automobile top cover assembly and automobile

Info

Publication number: CN111845949B
Application number: CN201910358847.XA
Authority: CN
Inventors: 李敏浩; 姜叶洁; 刘向征; 陈东
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2023-05-16
Anticipated expiration: 2039-04-30
Also published as: CN111845949A

Abstract

The invention relates to an automobile roof assembly, a manufacturing and assembling method of the automobile roof assembly and an automobile, wherein the automobile roof assembly comprises the following components: the top cover frame comprises a force transmission framework, and the force transmission framework is formed by adopting a thermoplastic material through an injection molding process; and the top cover body is fixedly arranged on the top cover frame and comprises a resin matrix and a carbon fiber body which are mutually connected, and the resin matrix and the carbon fiber body are formed through a compression molding process. When the top cover body receives forward or side collision, impact force can be spread to the surrounding supporting structure of the automobile top cover assembly through the effective conduction of the force transmission framework, so that the rigidity, strength and modal performance of the automobile top cover assembly are improved, the impact resistance is improved, the weight of the automobile top cover assembly can be greatly reduced, the light weight effect is obvious, and energy conservation and consumption reduction are facilitated when the automobile runs.

Description

Automobile top cover assembly, manufacturing and assembling method of automobile top cover assembly and automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to an automobile top cover assembly, a manufacturing and assembling method of the automobile top cover assembly and an automobile.

Background

Lightweight design is one of the important subjects of modern automobile development, and in order to reduce energy consumption, various automobile manufacturers are increasingly concerned about optimizing the automobile body structure, and hope to reduce the weight to the greatest extent under the premise of unchanged performance. The automobile roof is an important component part for forming an automobile body, and the structural rigidity and the strength of the automobile roof have great influence on the safety and the stability of the whole automobile.

Conventionally, in order to ensure structural strength and rigidity, automobile top covers are often made of pure metal materials, so that the automobile top covers are complex in structure and heavy in weight, cannot realize light-weight design, and are not beneficial to energy conservation and consumption reduction of automobiles. In order to ensure that the automobile top cover has lighter weight, automobile manufacturers also adopt novel light materials, but a part of structural rigidity and strength are always required to be sacrificed, so that the local rigidity and yield strength of the automobile top cover are reduced, the shock resistance is reduced, the service life of the whole automobile is influenced, and the use safety and reliability are reduced.

Disclosure of Invention

Based on the above, it is necessary to provide an automobile roof assembly which has excellent structural rigidity, strength and impact resistance, is light in weight, meets the light-weight design requirement, and is beneficial to energy conservation and consumption reduction; the manufacturing and assembling method for producing the automobile roof assembly is capable of obtaining the automobile roof assembly which is high in structural strength and rigidity, excellent in shock resistance and light in weight, and capable of being firmly assembled with an automobile body, and the method is simple in steps and easy to implement; in addition, the automobile is good in overall structural strength and rigidity by adopting the automobile top cover assembly, good in use reliability and safety, and energy saving and consumption reduction are facilitated by adopting a light-weight design.

The technical scheme is as follows:

in one aspect, the present application provides an automotive roof assembly comprising:

the top cover frame comprises a force transmission framework, and the force transmission framework is formed by adopting a thermoplastic material through an injection molding process; a kind of electronic device with high-pressure air-conditioning system

The top cover body is fixedly arranged on the top cover frame and comprises a resin matrix and a carbon fiber body which are connected with each other, and the resin matrix and the carbon fiber body are formed through a compression molding process.

In the automobile roof assembly, the roof body is formed by connecting a resin matrix with a carbon fiber body, and the roof body is arranged on the roof frame and combined with the force transmission framework. When the top cover body receives forward or side collision, the impact force can be transmitted through the force transmission framework effectively, and the impact force is rapidly and uniformly diffused to the surrounding supporting structure of the automobile top cover assembly, so that the automobile top cover assembly can be prevented from being deformed and even cracked due to overlarge impact force. In addition, as the force transmission framework is formed by adopting a thermoplastic material through an injection molding process, and the resin matrix and the carbon fiber body are formed through a compression molding process, the weight of the automobile top cover assembly can be greatly reduced by adopting the light material, the light weight effect is obvious, and the energy saving and consumption reduction in the running process of an automobile are facilitated.

The technical scheme of the application is further described below:

in one embodiment, the force transmission framework comprises a force transmission arm and a force transmission annular plate which are connected with each other, and one end point of the force transmission arm is coincident with the center of the force transmission annular plate or is in the same straight line.

In one embodiment, the number of the force transmission arms is at least two, the number of the force transmission annular plates is at least two, the force transmission annular plates are radially spaced and are mutually nested concentrically, one end of the force transmission arms is converged at the center of the force transmission annular plates, the other end of the force transmission arms is circumferentially distributed and radially extended outwards, and all the force transmission annular plates are connected with all the force transmission arms.

In one embodiment, a structural hole is formed between two adjacent force transmission arms and two adjacent force transmission annular plates in a surrounding mode.

In one embodiment, the top cover frame further comprises a connecting lug, and the connecting lug is formed at the edge of the force transmission framework and provided with an assembly hole.

In one embodiment, the resin matrix comprises a resin base layer and at least one resin bonding layer, the carbon fiber body comprises at least two carbon fiber layers, all the carbon fiber layers are woven orthogonally to each other and are stacked on the resin base layer, and one resin bonding layer is arranged between every two adjacent carbon fiber layers.

In one embodiment, the top cover body further includes a connection edge formed at a side edge of the resin base layer.

In one embodiment, the top cover body and the top cover frame are connected through adhesive.

In another aspect, the present application also provides an automobile comprising the automobile roof assembly as described above. The automobile is good in overall structural strength and rigidity by adopting the automobile top cover assembly, good in use reliability and safety, and energy saving and consumption reduction are facilitated by adopting a light-weight design.

In addition, the present application also provides a manufacturing and assembling method for producing the automobile roof assembly as described above, which includes the steps of:

injecting a thermoplastic material into an injection mold to obtain a top cover frame, wherein the top cover frame comprises a force transmission framework and connecting lugs formed on the force transmission framework;

placing a carbon fiber body into a mould pressing mould, and then injecting a resin-based material into the mould pressing mould to obtain a top cover body, wherein the top cover body comprises a resin matrix and the carbon fiber body which are connected with each other and a connecting edge formed on the resin matrix;

coating adhesive on the force transmission framework to enable the top cover body to be adhered to the force transmission framework, so as to obtain an automobile top cover assembly;

coating an adhesive on the connecting edge to enable the automobile roof assembly to be adhered to an automobile body;

the top cover frame is in threaded connection and fixation with an A column, a B column and a C column of the automobile body through connecting lugs;

and the top cover body is riveted and fixed with the side wall of the automobile body through the connecting edge, so that the assembly operation of the automobile top cover assembly and the automobile body is completed.

The manufacturing and assembling method can obtain the automobile roof assembly with high structural strength and rigidity, excellent shock resistance and light weight, and can be firmly assembled with the automobile body, and the method has simple steps and is easy to implement.

Drawings

FIG. 1 is a schematic view of an automobile roof assembly according to an embodiment of the invention;

FIG. 2 is a schematic view of the roof body of the roof assembly of FIG. 1;

FIG. 3 is a schematic view of the roof frame in the roof assembly of FIG. 1;

fig. 4 is a flowchart illustrating steps of a manufacturing and assembling method for producing the automobile roof assembly according to an embodiment of the present invention.

Reference numerals illustrate:

10. top cover frame, 11, force transmission skeleton, 111, force transmission arm, 112, force transmission annular plate, 12, structure hole, 13, connecting ear, 131, assembly hole, 20, top cover body, 21, resin matrix, 22, carbon fiber body, 23, connection limit.

Detailed Description

The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted," "disposed," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the specific manner in which one element is fixedly connected to another element may be achieved by the prior art, and is not described in detail herein, and a threaded connection is preferably used.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.

As shown in fig. 1 and 3, an automobile roof assembly for attachment to a body frame for a complete automobile body structure is shown in accordance with one embodiment of the present application. As an important component of the body structure of a motor vehicle, the weight and structural properties of the roof assembly of the motor vehicle determine to a great extent the safety and reliability of the motor vehicle.

In particular to this embodiment, the automobile roof assembly includes: a top cover frame 10 and a top cover body 20. The top cover body 20 is arranged above the top cover frame 10 in a covering manner, and is fixed by the top cover frame 10. The roof frame 10 is used for attachment to a body frame in addition to the roof body 20.

Specifically, the top cover frame 10 comprises a force transmission framework 11, and the force transmission framework 11 is formed by adopting a thermoplastic material through an injection molding process. More preferably, the thermoplastic material used for manufacturing the force transmission framework 11 is long glass fiber reinforced polypropylene plastic, and the type of material has the advantages of low density, high specific strength, high specific modulus, strong impact resistance, stable size, low warping degree and the like, and has obvious light weight effect and simple processing and forming. Of course, in other embodiments, the force-transmitting skeleton 11 may be made of other types of materials. Such as modified polypropylene, fibrilia, etc.

The top cover body 20 is fixedly arranged on the top cover frame 10, and in an alternative embodiment, the top cover body 20 is connected with the top cover frame 10 through adhesive. Specifically, the adhesive may be a structural adhesive, so that the assembly and connection of the top cover body 20 and the top cover frame 10 are simple, the connection strength is ensured, and meanwhile, the manufacturing difficulty is reduced, and the production efficiency is improved. Of course, in other embodiments, the top cover body 20 and the top cover frame 10 may be connected in other manners. Such as welding, riveting, snap-fit connection, etc.

With continued reference to fig. 2, the top cover body 20 includes a resin matrix 21 and a carbon fiber body 22 that are connected to each other, and the resin matrix 21 and the carbon fiber body 22 are formed by a compression molding process. During manufacturing, the carbon fiber body 22 is placed in a mould and is molded, and then resin-based materials are injected, so that the carbon fiber body 22 is fully soaked in the resin-based materials; then, the pressure maintaining and heating operation is carried out on the die, the resin matrix 21 is formed after the resin matrix material is solidified, and the resin matrix 21 can be firmly connected with the carbon fiber body 22 into a whole to obtain the top cover body 20.

In the automobile roof assembly, the roof body 20 is formed by connecting a resin matrix 21 and a carbon fiber body 22, and the roof body 20 is arranged on the roof frame 10 and combined with the force transmission framework 11. When the roof body 20 receives forward or side collision, the impact force can be quickly and evenly spread to the surrounding supporting structure of the automobile roof assembly through the effective conduction of the force transmission framework 11, so that the automobile roof assembly can be prevented from being deformed and even cracked due to overlarge impact force. In addition, as the force transmission framework 11 is formed by adopting a thermoplastic material through an injection molding process, and the resin matrix 21 and the carbon fiber body 22 are formed by adopting a compression molding process, the weight of the automobile top cover assembly can be greatly reduced by adopting a light material, the light weight effect is obvious, and the energy saving and consumption reduction in the running process of an automobile are facilitated.

The roof assembly is typically located on the topmost surface of the entire vehicle and is susceptible to impact forces from the height direction, either vertically downward or diagonally downward, or laterally. For example, in severe weather, the roof is extremely susceptible to frontal impacts of rain water and hail, or impacts of falling high-altitude foreign matters, or lateral impact between vehicles when traffic accidents occur during running of the vehicles, which all put high demands on the structural performance of the roof assembly of the vehicles. If the structural rigidity and strength of the automobile roof assembly are weak, or effective conduction and diffusion of impact force cannot be realized, expansion and contraction deformation and even rupture are extremely easy to occur. With continued reference to fig. 3, in an alternative embodiment, the force transmission skeleton 11 includes a force transmission arm 111 and a force transmission ring plate 112 that are connected to each other, and an end point of the force transmission arm 111 coincides with or is in the same line as a center of the force transmission ring plate 112. Therefore, when the automobile roof assembly is impacted in the front, the force transmission framework 11 can serve as a main load bearing component, so that impact force can be rapidly conducted and diffused from the force transmission arm 111 to the periphery by taking the center of the force transmission annular plate 112 as an origin, and damage caused by overlarge stress on the roof body 20 is prevented. In terms of structural composition, the force transfer arm 111 may have one end disposed in the center of the force transfer ring plate 112 and the other end extending outward after passing over the force transfer ring plate 112. Alternatively, the force transfer arms 111 are arranged exactly on the diameter of the force transfer ring plate 112, and both ends of the force transfer arms 111 are respectively connected with the force transfer ring plate 112.

Further, to improve the structural strength and rigidity of the roof assembly of the automobile, and improve the impact resistance, in one embodiment, the number of the force transfer arms 111 is at least two, the number of the force transfer ring plates 112 is at least two, the at least two force transfer ring plates 112 are spaced radially and are nested concentrically, one end of the at least two force transfer arms 111 is converged at the center of the force transfer ring plates 112, the other end of the at least two force transfer arms 111 is distributed circumferentially and extends radially outwards, and all the force transfer ring plates 112 are connected with all the force transfer arms 111. In this embodiment, to facilitate understanding of the technical solution, it may be understood that each force transmission arm 111 and each force transmission annular plate 112 cooperate with each other to form a spider-web structure. The impact force can be rapidly and uniformly conducted and diffused to the periphery through the force transmission arms 111 and the force transmission annular plates 112 by taking one converged end of the force transmission arms 111 as a transmission origin, and the spider-web structure can provide more force transmission paths, so that the conducting and diffusing efficiency of the impact force is ensured, and the automobile top cover is prevented from being broken when in instantaneous impact and continuous impact.

In addition, because the impact force can be quickly and uniformly conducted and spread to the supporting structures around the automobile roof assembly, such as the upright posts, the side beams and the like, the modal rigidity of the automobile roof assembly is indirectly increased, and the influence on the NVH performance of the automobile caused by low-frequency resonance in the running process of the automobile can be avoided.

It should be noted, of course, that in other embodiments, the force transfer arms 111 cooperate with the force transfer ring plates 112 to form other types of force transfer structures. For example, a mesh pattern, an arch pattern, etc.

With continued reference to fig. 3, further, a structural hole 12 is formed between two adjacent force transfer arms 111 and two adjacent force transfer ring plates 112. Therefore, on the premise of meeting the structural rigidity and the force transmission performance of the force transmission framework 11, the structural holes 12 can realize the material reduction manufacture of the top cover frame 10, which is beneficial to reducing the overall weight of the automobile top cover assembly, so that the whole automobile is designed in a lightweight way, and the purposes of energy conservation and consumption reduction are achieved.

With continued reference to fig. 3, in any of the foregoing embodiments, the top cover frame 10 further includes a connecting lug 13, where the connecting lug 13 is formed at an edge of the force transmission skeleton 11 and has an assembly hole 131. The attachment lugs 13 are provided so that the roof frame 10 can be assembled with the vehicle body. More preferably, the number of the connecting lugs 13 is six, and each two connecting lugs are arranged on the long side of the force transmission framework 11 and are respectively arranged in the front area, the middle area and the rear area. When the automobile roof assembly is assembled, each group of connecting lugs 13 can be assembled and connected with the A column, the B column and the C column respectively, so that the assembly strength of the automobile roof assembly and the automobile body is improved. Optionally, the assembly holes 131 formed on the connecting lugs 13 are threaded holes, and correspondingly, corresponding positions on the A column, the B column and the C column are reserved with threaded holes, and the assembly is performed by adopting bolts for locking, so that the assembly method is simple, and the connection strength is high. Of course, in other embodiments, other connection methods may be used to assemble the connecting lugs 13 to the vehicle body. Such as welding, riveting, cementing, etc.

In an embodiment of the present disclosure, the resin matrix 21 includes a resin base layer and at least one resin bonding layer, the carbon fiber body 22 includes at least two carbon fiber layers, all the carbon fiber layers are woven orthogonally to each other and are stacked on the resin base layer, and a layer of the resin bonding layer is disposed between two adjacent carbon fiber layers. The carbon fiber body 22 is formed by braiding at least two carbon fiber layers in an orthogonal mode, the tensile strength of the carbon fiber material is high, the comprehensive indexes of specific strength and specific modulus are far superior to those of the existing other materials, and the rigidity, strength and light weight requirements of a vehicle body structure can be effectively met; the material has small thermal expansion coefficient, small deformation under the condition of temperature change and good dimensional stability; the electrochemical activity is low, the method can adapt to various complex environments, and the service life is long. Therefore, when the device is applied to the automobile top cover assembly, the device can meet the requirements of complex and changeable use environments of automobiles, and has high reliability. The resin base layer is formed by resin base material, because the resin base material has excellent thermosetting property, can be quickly and fully combined with the carbon fiber body 22 under the condition of pressurizing and heating in a mould pressing die, and can ensure the structural strength and the forming quality of the top cover body 20.

With continued reference to fig. 2, the top cover body 20 further includes a connecting edge 23, and the connecting edge 23 is formed on a side edge of the resin base layer. Therefore, when the whole vehicle is assembled, the roof body 20 can be assembled and connected with the side wall of the vehicle body through the connecting edge 23. The connection mode can be a mode of gluing and/or riveting by structural adhesive.

In addition to the above, the application further provides an automobile, which comprises the automobile top cover assembly. The automobile is good in overall structural strength and rigidity by adopting the automobile top cover assembly, good in use reliability and safety, and energy saving and consumption reduction are facilitated by adopting a light-weight design.

Further, the present application also provides a manufacturing and assembling method for producing the automobile roof assembly as described above, which includes the steps of:

step S100: injecting a thermoplastic material into an injection mold, and demolding after pressure maintaining and cooling to obtain a top cover frame 10, wherein the top cover frame 10 comprises a force transmission framework 11 and connecting lugs 13 formed on the force transmission framework 11;

step S200: placing a carbon fiber body 22 into a mould, and then injecting a resin-based material into the mould to obtain a top cover body 20, wherein the top cover body 20 comprises a resin matrix 21 and the carbon fiber body 22 which are connected with each other, and a connecting edge 23 formed on the resin matrix 21;

step S300: coating adhesive on the force transmission framework 11 to enable the top cover body 20 to be adhered to the force transmission framework 11, so as to obtain an automobile top cover assembly;

step S400: coating adhesive on the connecting edge 23 to enable the automobile roof assembly to be adhered to an automobile body;

step S500: the top cover frame 10 is screwed and fixed with an A column, a B column and a C column of the car body through connecting lugs 13;

step S600: the roof body 20 is riveted and fixed with the side wall of the vehicle body through the connecting edge 23, so that the assembly operation of the automobile roof assembly and the vehicle body is completed.

In order to avoid excessive glue quantity, the glue overflows during assembly, the assembly quality is affected, the vehicle body is clean, or the glue is too little, the bonding strength is insufficient, the vehicle body stability is affected, the width of the glue is controlled to be 20-50 mm, and the thickness is controlled to be about 3mm during gluing. When in cementing, external pressure is required to be uniformly applied, so that the glue solution is uniformly spread on the assembly surface, and the glue solution is kept still until firm in connection.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An automotive roof assembly, comprising:

The top cover body is fixedly arranged on the top cover frame and comprises a resin matrix and a carbon fiber body which are connected with each other, and the resin matrix and the carbon fiber body are formed through a compression molding process; the method also comprises the following steps:

2. The automobile roof assembly according to claim 1, wherein the force transmission framework comprises a force transmission arm and a force transmission annular plate which are connected with each other, and one end point of the force transmission arm is coincident with the center of the force transmission annular plate or is in the same straight line.

3. The automobile roof assembly according to claim 2, wherein the number of the transmission arms is at least two, the number of the transmission annular plates is at least two, the at least two transmission annular plates are radially spaced and are arranged in a mutually concentric nested manner, one identical end of the at least two transmission arms is converged at the center of the transmission annular plates, the other identical ends of the at least two transmission arms are circumferentially distributed and radially extended outwards, and all the transmission annular plates are connected with all the transmission arms.

4. The automobile roof assembly according to claim 3, wherein structural holes are formed between two adjacent force transmission arms and two adjacent force transmission annular plates in a surrounding manner.

5. The automobile roof assembly of claim 2, wherein the roof frame further comprises a connecting lug formed at an edge of the force transmission skeleton and provided with an assembly hole.

6. The automotive roof assembly of claim 1, wherein the resin matrix comprises a resin base layer and at least one resin tie layer, the carbon fiber body comprises at least two carbon fiber layers, all of the carbon fiber layers are woven orthogonal to each other and are stacked on the resin base layer, and one resin tie layer is disposed between two adjacent carbon fiber layers.

7. The automotive roof assembly of claim 6, wherein the roof body further includes a connecting edge formed on a side of the resin base layer.

8. The automotive roof assembly of any one of claims 1 to 7, wherein the roof body and the roof frame are connected by an adhesive.

9. An automobile comprising an automobile roof assembly as claimed in any one of claims 1 to 8.