JPH0327903Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to the front body structure of an automobile. Specifically, the left and right front frames extending forward are connected by a cross member to provide continuity between the two. This relates to the internal structure of the front part of the vehicle body.

[Prior art]

In a wheel apron that forms the inside of the vehicle body above the front wheels of an automobile, a front frame is provided along the side of the lower part of the apron on the center side of the vehicle body in order to reinforce the vehicle body. The front frame usually consists of a frame outer and a frame inner, both of which form a closed cross section, thereby increasing the rigidity of the front vehicle body in the longitudinal direction. In such a front frame, the left and right front ends are fixed to a shroud panel such as a lamp shroud or a radiator grill at the front of the vehicle. However, since it is necessary to connect the left and right front frames to increase their lateral rigidity, a cross member that extends in the left-right direction of the vehicle body is usually used. An example of a structure that improves rigidity by providing continuity between the front frame and the cross member is the coupling structure between the front side member and the cross member described in JP-A-56-103657, for example. be.

Incidentally, in order to meet various demands from a design standpoint, such as the shape of the vehicle body such as a sunken front part and the ease of attaching other parts, the front frame may be extended in front of the shroud panel. In this case, if the cross member is connected to the shroud panel as before, the extended part will overhang, and the strength of that part cannot be ensured, making it difficult to attach bumpers, etc. may be insufficient.

In addition, if the front frame is extended directly in front of the shroud panel, it is not possible to weld the frame with a closed section structure and the shroud panel in the form of a flange connection. The problem arises that it cannot take any form. Furthermore, there is a problem in that the subassembly of predetermined members in each part is obstructed, and workability in assembling the vehicle body is significantly impaired.

[Purpose of invention]

The present invention was developed in view of the above-mentioned problems, and its purpose is to realize continuity between the left and right front frames that extend forward and the cross member in a way that increases the rigidity of the two, and to The structure can be made into a form that is highly suitable for mass production, and in addition, it is possible to sub-assemble certain parts in each part, improving assembly workability, increasing the strength of joints, and increasing the rigidity of the front frame. An object of the present invention is to provide an automobile front body structure that can be improved.

[Structure of the idea]

The features of the vehicle front body structure of the present invention are as follows. The lower part of the lamp shroud is joined to the almost horizontal front end of the wheel apron, and the front frame, which forms a closed section with the frame outer and frame inner, is connected to the side of the almost horizontal front end of the wheel apron on the center side of the vehicle body. It is placed downward along the line. A joining flange with the lamp shroud is formed at the front end of the frame outer, while the frame inner extends forward from the lamp shroud. In addition, the lower part of the lamp shroud on the center side of the vehicle body is extended downward along the joint flange of the frame outer,
The extension is triangularly shaped below the generally horizontal front end of the wheel apron. A joining flange of the frame outer is joined to the side part of this extension part on the vehicle center side, and a gusset member joined to the extension part of the front frame in front of the lamp shroud forms the front frame outer part. , whose rear end is joined to a joining flange of the frame outer via an extension of the lamp shroud.

〔Example〕

The present invention will be described in detail below based on examples thereof. FIG. 1 is an internal perspective view of the left front part of an automobile to which the front body structure of the present invention is applied. A front frame 2 is extended forward of a lamp shroud 1, and in order to strengthen the vehicle body, each of the left and right sides is A cross member 3 is bridged between the extension portions 2a.

In such a vehicle body structure, the lower part of the lamp shroud 1 is connected to the wheel apron 4 shown in FIG.
It is joined to the substantially horizontal front end portion 4a of. The above-mentioned front frame 2 is arranged below along the side of the front end 4a of the wheel apron 4 on the vehicle body center side. The frame outer 5 and frame inner 6 form a closed cross section 7, thereby increasing the rigidity of the front vehicle body in the longitudinal direction. As shown in FIG. 3, the frame outer 5
A joining flange 5A with the lamp shroud 1 is formed at the front end 5a of the lamp shroud 1, while the frame inner 6 extends forward from the lamp shroud 1.

As shown in FIG. 1, the lower part of the lamp shroud 1 on the vehicle body center side extends downward along the joint flange 5A of the frame outer 5, and the extension part 8 extends below the front end part 4a of the wheel apron 4. It is formed in a triangular shape. A frame outer 5 is attached to the side part of the extension part 8 on the side of the center of the vehicle body.
The joining flanges 5A are joined. A gusset member 9 is attached to the extension portion 8 of the front frame 2 in front of the lamp shroud 1. This gusset member 9 is located on an extension line of the frame outer 5, faces the extended frame inner 6, and functions to form an outer portion of the front frame. For this purpose, the rear end 9a is joined to the joining flange 5A of the frame outer 5 via the extension 8 of the lamp shroud 1.

On the other hand, the above-mentioned cross member 3 has one end fixed to the frame inner 6.
It is joined to the gusset member 10 shown in FIG. 4, so that the left and right front ends of the extended front frame 2 are bridged. Note that in this example, cross member 3
adopts a pipe structure and is fixed at a short cylindrical flange 11 formed on the gusset member 10, and the gusset member 10 is attached to the frame inner 6.
The lamp shroud 1 is connected to a reinforcing portion 12 that projects forward in a triangular shape at the inner end of the vehicle body.

According to such a front body structure of an automobile, subassembly of predetermined members is performed prior to assembly of the vehicle body. First, as shown in FIG. 2, the frame outer 5 and frame inner 6 of the front frame 2 form a closed section 7, and this is attached along the side of the almost horizontal front end 4a of the wheel apron 4 on the vehicle body center side. and connect it downward. To the wheel apron 4, the lower part of the lamp shroud 1 is joined to its front end 4a as shown in FIG. 1, forming one subassembly. At this time, in the triangular extension 8 formed below the front end 4a of the wheel apron 4,
A joining flange 5A of the frame outer 5 is joined to the side portion on the center side of the vehicle body. The frame inner 6 is extended forward from the lamp shroud 1. Separately, both ends of the cross member 3 are joined to a gusset member 10 shown in FIG. 4 fixed to the frame inner 6 to form a bridging subassembly for continuity with the front frame 2. be done.

Each sub-assembly is prepared on the car body assembly line, and when the sub-assembly of the wheel apron 4 and lamp shroud 1 is attached to the car body and transported, the cross member 3 is attached to the lamp shroud 1. A subassembly including the is assembled. A gusset member 10 integrated with the cross member 3 is joined to the reinforcing portion 12 of the frame inner 6 and the lamp shroud 1 projecting forward by spot welding. next,
The gusset member 9 is made to face the frame inner 6 extending forward, and the frame outer 5
It is placed so that it is located on the extension line of. Therefore, the rear end 9a of the gusset member 9 is joined to the joining flange 5A of the frame outer 5 by spot welding via the triangular extension 8 of the lamp shroud 1, as shown in FIG. lastly,
The bumper mounting member 13 is attached to the gusset members 9 and 10.
It is joined to flanges 9b and 10b formed at the front end of the.

According to this type of assembly, members with complex shapes can be made into sub-assemblies, and even if the front frame, which has a closed cross section, is extended forward of the lamp shroud, it is possible to , it becomes possible to join by spot welding, and the workability of assembly is significantly improved. Moreover, the front frame, which is extended in front of the lamp shroud, is easily connected to the cross member, and the strength at the joint and the rigidity of the frame can be improved.

[Effect of idea]

As can be seen from the description of the embodiments above, the present invention has the following features:
The front end of the frame outer integrated with the wheel apron is joined to the lamp shroud, and the frame inner is extended forward of the lamp shroud to form a triangular extension at the lower part of the lamp shroud. The rear end of the gusset member, which is joined to the extension of the front frame in front of the shroud, is joined to the joining flange of the frame outer through the extension of the lamp shroud, so the left and right front ends are extended forward. The continuity of the connection between the frame and cross member,
It can be realized in a form with increased rigidity. Moreover, the joining structure can be made highly workable, and it is possible to make them into sub-assemblies.
As a result, the workability of assembly is significantly improved, and in addition, the strength and rigidity of the vehicle body structure including the front frame can be improved.

[Brief explanation of the drawing]

FIG. 1 is an internal perspective view of the left front part of the vehicle body to which the front vehicle body structure of the present invention is applied, FIG. 2 is an inside perspective view of the right front part of the vehicle body including the wheel apron, and FIG. 3 is the same as that shown in FIG. 1. line cut perspective view,
FIG. 4 is a partial perspective view of the mounting surface of the cross member. 1... Lamp shroud, 2... Front frame, 3... Cross member, 4... Wheel apron, 4a... Front end, 5... Frame outer,
5a...front end, 5A...joining flange, 6...
Frame inner, 8... extension part, 9... gusset member, 9a... rear end part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a front body structure in which the front frame is extended forward from the lamp shroud and a cross member is bridged between the extensions on the left and right sides, the lower part of the lamp shroud is a wheel apron. The front frame, which is joined to the substantially horizontal front end of the wheel apron and forms a closed cross section with the frame outer and the frame inner, is arranged downwardly along the side of the substantially horizontal front end of the wheel apron on the vehicle body center side. , a joining flange with the lamp shroud is formed at the front end of the frame outer;
The frame inner extends forward from the lamp shroud, and the lower part of the lamp shroud on the vehicle body center side extends downward along the joint flange of the frame outer, and the extended portion extends forward from the wheel apron. It is formed in a triangular shape below the almost horizontal front end, and the joining flange of the frame outer is joined to the side part of this extension on the center side of the vehicle body, and the joint flange of the frame outer is joined to the extension of the front frame in front of the lamp shroud. A front part of a motor vehicle, characterized in that a rear end of the gusset member to be joined is joined to a joining flange of a frame outer via an extension of a lamp shroud so as to form a front frame outer part. Vehicle structure.