JPH0858622A - Body front structure for automobile - Google Patents

Abstract

PURPOSE: To provide a body front structure for an automobile whereby increase in workability of assembly between a module carrier and a front body and work efficiency can be obtained. CONSTITUTION: A module carrier 1 on which an attachment 9 having a U-shape section is provided is lowered, the attachment 9 is fitted closely to a side member bracket 15 installed at the front end of a front side member 12, and the module carrier 1 is positioned relatively to the front side member 12. Also it is fixed with bolts 18a from the underside, and a back beam 16 for bumper is installed on the attachment 9 with bolts 19a extended from the front of a car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure.

[0002]

2. Description of the Related Art In the conventional manufacture of automobile bodies, when installing pipes, harnesses, brake boosters, etc. in the engine room, the operator must work from the front fender side because the engine room is formed in a box shape. Bend your waist,
It is performed in an unreasonable posture such that the arm is extended from the lower part of the engine room, the fatigue level of the worker is high, and the engine unit is loaded from below into the engine room which has a very limited working space, so the assembly work There was a problem such as difficulty.

As a countermeasure against this, Japanese Patent Laid-Open No. 63-112279
As shown in FIG. 3 and shown in FIG. 3, in the fitting process, the module carrier 22 attached to the front surface of the front vehicle body 21 is removed, and the radiator, headlamp, oil cooler and other parts are attached to the module carrier 22. Separately, and the worker enters through the front opening between the left and right front upper frames 23 in the engine room, and installs parts such as the brake booster, clutch cylinder, tubing, and harness on the toe board 24 and the engine room wall, In addition, an engine unit composed of drive system components such as an engine, a transmission, and a suspension is carried in from the lower surface of the front vehicle body 21, and then mounted on the front surface of the front vehicle body 21 through which the front side member 25 is fitted. The module carrier 22 having the Measures to give has been proposed.

[0004]

According to the above-mentioned conventional vehicle body front structure, by removing the module carrier from the front portion of the front vehicle body, the work of assembling the parts and the engine unit in the outfitting process becomes easy. In addition, work efficiency can be improved. However, when the module carrier is attached to the front vehicle body, the opening formed in the module carrier and the front side member of the front vehicle body are fitted and fixed by bolts, so that the radiator, the headlight, and the oil are beforehand attached. With the heavy-weight module carrier assembled with a cooler and the like positioned relative to each other with the opening and the front side member facing each other, move the module carrier toward the front vehicle body to move the opening and front side member of the module carrier. The assembling work for fitting requires skill, and imposes a heavy work load on the worker, and thus has problems such as hindering improvement in workability and work efficiency.

Therefore, an object of the present invention is to provide a vehicle body front structure capable of improving assembly workability and work efficiency of a module carrier and a front vehicle body.

[0006]

In order to achieve the above object, a vehicle body front structure according to the present invention comprises a module carrier including an upper frame and a middle frame arranged below the upper frame. In a vehicle body front structure attached to the front surface of the vehicle body, the left and right front side members extending along the vehicle front-rear direction with a closed cross-sectional shape forming the front vehicle body and the middle frame of the module carrier are provided. And an attachment having a substantially U-shaped cross section that can be fitted to a predetermined position on the front end of the front side member from above, and the fixing attachment that fits to the predetermined position on the front end of the front side member and the front side member from below. Fasteners for fixing the module carrier that penetrates through and the front ends of the left and right front side members A back beam bumper of laterally placed between attachment was engaged, and has a bumper mounting fastener for coupling to the attachments through the back beam from the front of the vehicle body.

[0007]

[Function] The module carrier is lowered from above, and an attachment having a U-shaped cross-section provided on the middle frame of the module carrier is fitted at a predetermined position on the front end of the front side member so that the module carrier and the front side member can be moved relative to each other. After positioning, the fastener for fixing the module carrier is penetrated from below to connect the attachment and the front side member, and then the back beam is laid horizontally between the attachments connected to the front ends of the left and right front side members. Attach the beam to the attachment with a bumper attachment fastener that penetrates the beam from the front of the vehicle.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the front body structure of an automobile according to the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a main part of a front body structure for explaining the present embodiment, and FIG. 2 is a sectional view taken along the line AA of FIG. 1 in an assembled state. Reference numeral 1 is a module carrier.

The module carrier 1 is an upper frame 2
A radiator mounting portion 5 surrounded by the lower middle frame 3 and the left and right vertical frames 4 is formed in the central portion, and headlamp mounting portions 6 are formed on both sides of the radiator mounting portion 5.

At a predetermined position below the module carrier 1, a fixing attachment 7 composed of a mounting bracket 8 and an attachment 9 is attached.

The upper portion of the mounting bracket 8 is fitted to the middle frame 3 of the module carrier 1 so that the mounting bracket 8 is positioned relative to the module carrier 1 and is fixed to the module carrier 1 from a base portion 8a having a U-shaped cross section and a base portion 8a. The stay portion 8b has a substantially T-shape in plan view having a stay portion 8b extending downward, and the stay portion 8b includes a back beam 16 described later.
A mounting hole 8c for mounting is attached and an attachment 9 is mounted. The base portion 8a serves as a guide groove for the harness 20.

The attachment 9 has an attachment main body 9a having a U-shaped cross section which is fitted from above into a side member bracket 15 having a closed cross section which is fixed to a front end of a front side member 12, which will be described later, and a front end of the main body 9a. It has an upper flange 9c which protrudes upward from the upper part and is coupled to the stay portion 8b of the mounting bracket 8 and which has a mounting hole (not shown) continuous with the mounting hole 8c, and is provided at a portion corresponding to the mounting hole. The nut 19b is welded.
Further, it has side flanges 9d protruding left and right from both sides of the front end of the attachment body 9a, and mounting holes 9b are formed in each side flange 9d. A nut 19b is welded to a portion corresponding to the mounting hole 9b. A rear flange 9e is formed at the rear end of the attachment body 9a.

On the other hand, the front vehicle body 11 on which the module carrier 1 is attached to the front portion is provided with left and right front upper frames (not shown) extending forward from both ends in the vehicle width direction of the toe board which divides the engine room from the vehicle interior. Left and right front side members 12 that extend from the front part of the floor panel along the left and right front upper frames, a bracket 13 that connects the front upper frame and the front side member 12, and a front end that connects the left and right front side members 12. Cross member 14
And a side member bracket 15 connected to the front end of each front side member 12 and extending forward of the vehicle body.

The side member bracket 15 has a substantially rectangular closed cross-section and has bolt insertion holes 15a in the upper and lower walls thereof. The front side member 12 and the side member bracket 15 are formed at the front and rear ends of each of them. The flanges 12a and 15b are connected so as to be inclined so as to be gradually displaced toward the front of the vehicle body as they move downward.

The back beam 16 has a substantially hat-shaped cross section, is horizontally inserted between the left and right fixing attachments 7 and is inserted through the mounting holes 16a formed in the vicinity of both ends thereof to the mounting bracket 8 and the attachment 9. It is attached to the attachment 9, that is, the front end of the front vehicle body 11 by bolts 19a and nuts 19b that penetrate through the opening attachment holes 8c and 9b and serve as a bumper attachment fastener. Reference numeral 16b is a locking piece that is inserted from the front end opening of the side member bracket 15 and placed and locked on the lower wall surface to perform its positioning function.

The shock absorbing material of the back beam 16 mounted laterally between the left and right fixing attachments 7 is interposed and fitted into the recesses of the middle frame 3 of the module carrier 1 or the base 8a of the mounting bracket 8. The bumper is formed by covering the harness 20 and the harness 20 with a bumper face (not shown).

The assembling of the vehicle body front structure of this embodiment having the above-mentioned structure will be described below.

A radiator is attached to the radiator assembly portion 5 of the module carrier 1 in which the fixing attachment 7 is attached to a predetermined position in advance, the headlamp is attached to the headlamp attachment portion 6, and the cooling fan and the condenser of the air conditioner are attached. The module carrier 1 having other parts attached thereto is attached to the rear side of the vehicle body of the module carrier 1 by abutting or sliding contact between the flange 15b of the side member bracket 15 connected to the front end of the front side member 12 and the rear flange 9e of the attachment 9. The attachment body 9a of the attachment 9 is brought into contact with the side member bracket 15 so that the attachment 9 and the side member bracket 15 are engaged with each other so that the attachment 9 and the side member bracket 15, and thus the module carrier 1 and the front vehicle body 11 are restrained. Relative position to Improve the fit.

Subsequently, the bolt insertion holes 15a formed in the upper and lower walls of the side member bracket 15 and the bolt insertion holes 9f formed in the upper wall of the attachment body 9a of the attachment 9 serve as fasteners for fixing the module carrier from below. The bolt 18a is inserted and penetrated so that the side member bracket 15 and the attachment 9 are attached to the nut 18b welded at a position corresponding to the bolt insertion hole 18a of the attachment body 9a, and thus the module carrier 1 and the front side member. Integrate with 12.
In the vicinity of the end of the front end cross member 14,
A through hole 14a for inserting a bolt 18a, a bolt tightening tool (not shown) and the like is opened.

Further, the front side member 12 is provided through the fixing attachment 7, the side member bracket 15 and the like.
The module carrier 1, which is integrally coupled with the front carrier, is fixed to the front upper frame, the bracket 13 connecting the front upper frame and the front side member 12 and the like at appropriate points from the front of the vehicle body by bolts or the like (not shown).

Subsequently, a locking piece 16b formed at the lower end edge of the back beam 16 is placed and locked on the lower wall surface of the side member bracket 15 and positioned in the vertical direction and the vehicle body width direction. The bolts 19a, which are fasteners for mounting bumpers, are inserted through the lower edges of the mounting holes 16a and the mounting holes 16a that open to the lower edges, and the stay portions 8 of the mounting brackets 8 are attached.
b through the mounting hole 8c formed in b and the mounting hole 9b formed in each of the flange portions 9c and 9d of the attachment 9 and screwed into the nut 19b.
6 is mounted laterally between the left and right front side members 12 via the left and right fixing attachments 7.

Next, it is attached to the module carrier 1,
Alternatively, a harness 20 such as an attached electric component, a lamp attached to a bumper, or another electric component (not shown) is fitted and locked in the recess of the middle frame 3 of the module carrier 1 and the base 8a of the mounting bracket 8. Arrange. The harness 20 is preferably protected by being covered with a corrugated tube or the like.

Middle frame 3 of module carrier 1
The harness 20 arranged along the back beam 16
It is covered by a bumper face with a shock absorbing material arranged on the front surface of the.

According to the present embodiment described above, the front side member 1 is moved by lowering the module carrier 1 provided with the attachment 9 having a U-shaped cross section.
2 The side member bracket 15 coupled to the front end is fitted so as to be sandwiched from above, so that relative positioning between the module carrier 1 and the front vehicle body 11 can be obtained, and the work is easier than the conventional positioning work. And back beam 1
6. The harness including the mounting work of 6 can be performed only from the front and the front of the vehicle with bolts and the like for assembling each member, and the harness 20 is disposed by fitting the harness 20 to the middle frame 3 of the module carrier 1. In addition to the fact that the mounting holes and mounting tools can be eliminated and the harness installation work can be rationalized, the work can be greatly simplified and the workability can be improved.

Further, since the back beam 16 is coupled via the attachment 9 having a substantially U-shaped cross section which is coupled to the side member bracket extending to the front end of the front side member 12, the attachment 9 is easily deformed in the event of a collision. Then, it effectively functions as an energy absorbing member that absorbs the impact energy from the back beam 16, and a slight collision can be dealt with by exchanging only the attachment 9.

In the illustrated embodiment, an example in which the mounting bracket 8 and the attachment 9 are integrally connected to the module carrier 1 has been described. It is also possible to make it easy to remove the parts and to easily replace and repair each part. It is also possible to integrally form the front side member 12 and the side member bracket 15 to reduce the number of parts to be assembled.

[0028]

According to the vehicle body front structure according to the present invention described above, the module carrier provided with the attachment having a U-shaped cross section is lowered and the side provided at the attachment and the front side member or the front end of the front side member. The module carrier and the front side member can be easily positioned relative to each other by fitting the member bracket, and the module carrier and the front side member can be easily connected by the fastener from below, and the back beam for the bumper. It is also possible to easily attach the parts by using fasteners from the front of the vehicle body, which facilitates the work of assembling the module carrier etc. and the front body of the vehicle body, and improves workability and work efficiency. It has an effect peculiar to the invention.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts for explaining an embodiment of a vehicle body front structure according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is an exploded perspective view of a main part for explaining a conventional vehicle body front structure.

[Explanation of symbols]

 1 Module Carrier 2 Upper Frame 3 Middle Frame 9 Attachment 11 Front Body Body 12 Front Side Member 15 Side Member Bracket 16 Back Beam 18a Bolt 18b Nut 19a Bolt 19b Nut 20 Harness

Claims (4)

[Claims] 1. A vehicle body front structure for an automobile in which a module carrier including an upper frame and a middle frame arranged below the upper frame is attached to a front portion of a front vehicle body. Left and right front side members having a closed cross-sectional shape that extend along the vehicle front-rear direction, and a substantially U-shaped cross-section that is provided on the middle frame of the module carrier and that can be fitted from above to a predetermined position on the front end of the front side member. -Shaped attachment, a module carrier fixing fastener that penetrates and connects the front side member and the above-mentioned fixing attachment that fits in a predetermined position on the front end of the front side member, and is connected to the front ends of the left and right front side members. Back beam for the bumper that crosses between the attachments and this back beam A vehicle body front structure, comprising: a bumper attachment fastener that penetrates the front of the vehicle body and is coupled to the attachment. 2. A vehicle body front structure of an automobile in which a module carrier having an upper frame and a middle frame disposed below the upper frame is attached to a front portion of a front vehicle body, and a front vehicle body is formed. The side member brackets having a closed cross-section fixed to the front ends of the left and right front side members extending along the front-rear direction of the vehicle body and the middle frame of the module carrier are provided, and the side member brackets are fitted to predetermined positions of the side member brackets from above. A module carrier fixing fastener that connects the possible attachment with a U-shaped cross section, the side member bracket and the above-mentioned attachment that fits at a predetermined position of the side member bracket, and couples to the left and right side member brackets. Bumpers for bumpers that lie horizontally between attached attachments And a bumper mounting fastener that penetrates the back beam from the front of the vehicle body and couples it to the attachment. 3. A mounting bracket provided with a guide groove for fitting and holding a harness along a vehicle body width direction is provided between a middle frame of a module carrier and an attachment. Car body front structure. 4. The vehicle body front structure according to claim 1, wherein the module carrier fixing fastener and the bumper attaching fastener are bolts and nuts screwed with the bolts.