JP3136707B2 - Car body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure in which an undercover (front underguard) is disposed below a pair of left and right side members constituting a body frame, and more particularly, to mounting of the undercover. It relates to structural improvement.

[0002]

2. Description of the Related Art In order to protect the lower surface of an engine room from obstacles when an automobile is running, an under cover is provided at a lower front portion of a vehicle body. Conventionally, the undercover is attached by various methods as shown in FIGS.

FIGS. 7 and 8 show an under cover 5 on a pair of left and right side members 50 and 51 constituting a body frame.
2 shows a conventional example in which flanges 55 and 56 bent on upper portions of side walls 53 and 54 of an under cover 52 are attached to front end portions of the side members 50 and 51. The bolts 57 and the nuts 58 fasten and fix to the lower surfaces of 50a and 51a, respectively.

FIGS. 9 and 10 show side members 5.
This shows a conventional example in which an under cover 52 is attached to a front cross member 59 installed between the front portions of the front cross member 0, 51. In this conventional example, both ends 59a, 59b of the front cross member 59 are attached. Side member 50,
The lower surface of the front clock member 59 is welded to the lower surface of the front end portions 50a and 51a of the front
The second flanges 55 and 56 are screwed with a tapping screw 60.

Further, there is a conventional example in which a dedicated bracket or the like is attached to the side members 50 and 51 or the front cross member 59, and the under cover 52 is attached to the bracket or the like.

FIG. 11 shows a conventional example in which an under cover 52 is attached to a front bumper 61. In this conventional example, the front portion of the under cover 52 is attached to a front bumper 61 via a bracket 62. It is intended to be fixed to. In addition, as another conventional example,
In some cases, an undercover is attached to a panel member such as a fender apron or an outer plate component directly or via a bracket or the like.

[0007]

However, in the structure shown in FIGS. 7 and 8 and the structure shown in FIGS. 9 and 10, although the upper portion of the under cover 52 can be fixed firmly, It is difficult to stop the lower part. In addition, the under cover 5
If the lower portion of the second member is fixed to the body frame, the lower portion can be fixed. However, in this case, a problem occurs in that the weight is increased and the cost is significantly increased.

In the structure shown in FIG. 11, it is often difficult to firmly fix the undercover 52.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to enable the entire undercover to be firmly attached without increasing the weight and cost. It is an object of the present invention to provide a vehicle body structure of a vehicle configured to facilitate installation work and effectively guide cooling air to a radiator.

[0010]

Means for Solving the Problems] To achieve the above object, the present invention, the body structure of a motor vehicle which is disposed an undercover below the pair of side members constituting the vehicle body frame, the side of the radiator provided with a radiator stay for supporting the Rajie <br/> data in section, the La
Extends downward from the radiator mounting part to the daisstay
An extension portion is provided, and a front portion of the undercover is attached to the extension portion .

Further, in the present invention, the undercover is constituted by a bottom wall and side walls erected on both right and left sides of the bottom wall, and is provided at a front portion of the side wall at a central portion in a width direction of the under cover. A protrusion is formed to project toward the radiator stay, and a part of the protrusion is provided with a mounting surface to the radiator stay, and a front portion of the protrusion is inclined rearward toward a central portion in a width direction of the undercover. An inclined surface is formed.

In the present invention, the mounting surface of the undercover is inclined with respect to the width direction of the undercover.

[0013]

[Operation] An undercover is attached to a radiator stay that is firmly manufactured to support the radiator, and the undercover is securely attached. Also,
An inclined surface is provided on the undercover, whereby cooling air is effectively guided to the radiator. In addition, since the mounting surface of the undercover is inclined, the mounting operation of the undercover is facilitated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 to 4 show a first embodiment of a vehicle body structure according to the present invention, in which an under cover 3 as shown in FIG. Are arranged.

As shown in FIG. 3, the front portion of the body frame 2 is composed of a pair of left and right side members (apron side members) 4a and 4b, and is provided in front of these side members 4a and 4b. Front bumper (not shown)
Are arranged.

The undercover 3 attached below the side members 4a and 4b is, as shown in FIGS.
A bottom wall 5 and a pair of side walls 6 erected on both sides of the bottom wall 5
a and 6b, and are formed in a substantially U-shaped cross section (channel shape) as a whole. A flange 7 is provided on the upper portions of both side walls 6a and 6b of the under cover 3.
a, 7b are formed by bending, and these flanges 7a, 7b
Are fastened to the lower surfaces of the side members 4a and 4b by bolts 8 and nuts 9, respectively, as shown in FIG.

On the other hand, the side portions of the under cover 3 are connected to the side members 4a, 4a via a pair of left and right radiator stays 10.
4b. That is, the radiator stay 10 is made of a strong member made of a long, thick steel plate or the like, and the upper ends thereof are fixed to the front portions of the side members 4a, 4b, respectively. The lower end of one radiator stay 10 (see FIG. 3) has a radiator mounting portion
Below the radiator stay 10 to which the radiator 15 is attached
An extended portion 12 is formed of a bent piece extending downward from the end portion), and a bolt insertion hole is formed in these extended portions 12. Further, nuts 14 are integrally attached to the above-mentioned extending portions 12 by welding corresponding to these bolt insertion holes. Thus, radiator status 10
The radiator 15 has a side portion attached via a bracket 16 (see FIG. 3), and a front portion of the undercover 3 is attached to an extension portion 12 of the radiator stay 10.

Here, the mounting structure between the undercover 3 and the radiator stay 10 will be described in detail with reference to FIGS. 3 and 4. The undercover 3 has a front part on the side wall 6a. 3 is provided with a protruding portion 17 protruding toward the left and right central portions. And this protruding part 1
The front portion 7 has an inclined surface 18 which is inclined rearward toward the center of the under cover 3 in the width direction. The reason why the protrusion 17 is provided on the side wall 6a is as follows. That is, since the width of the radiator 15 is usually shorter than the width between the left and right side members 4a and 4b for miniaturization,
When the radiator 15 is installed at the center between the side members 4a and 4b, a gap is generated at both left and right portions. Therefore, in this example, the radiator 15 is connected to the side members 4a, 4a.
b, the side wall 6a is disposed at a position offset toward the side wall 6b, and the side wall 6a is protruded inward by an amount corresponding to the gap between the radiator 15 and the other side wall 6a. Inclined surface 18 and undercover 3
The mounting surface 19 is provided.

The mounting surface 19 is formed as a seating surface at a protruding end of the protruding portion 17 and near the bottom wall 5 of the undercover 3, and is inclined with respect to the width direction of the undercover 3. (In this example, the inclination is 45 °). The mounting surface 19 has a bolt insertion hole.

Thus, the flange 7 of the under cover 3
a, 7b are fastened and fixed to the lower surfaces of the side members 4a, 4b with bolts 8 and nuts 9, and the extending portion 12 of the radiator stay 10 joined to the mounting surface 19 of the undercover 3 and the mounting surface. 19 are fastened and fixed by the welding nut 14 and the bolt 20 as shown in FIG. Thus, the upper portion of the under cover 3 is directly attached to the side members 4a and 4b, and the front portion of the under cover 3 is indirectly attached to the side members 4a and 4b via the radiator stay 10. Although not shown, the rear portion of the under cover 3 is attached to a rack side bracket, a pinion side bracket, and the like that support a steering shaft rack and a pinion casing.

According to the above-described configuration, the front portion of the undercover 3, particularly both the left and right portions of the bottom wall 5 of the undercover 3, can be firmly fixed by using the existing radiator stay 10. Therefore, it is not necessary to use a special bracket dedicated to mounting, the number of parts and the weight are not increased, and the mounting structure of the undercover 3 is simplified. When the under cover 3 is mounted, the mounting surface 19 of the under cover 3 is inclined at 45 ° as described above (rises upward), so that the vehicle body is completely lifted up by a lift or the like. Even without,
The work of tightening the bolts 20 can be performed from below the vehicle body, so that workability can be improved. further,
As a result of the inclined surface 18 provided at the front part of the under cover 3 functioning as a wind guide plate, the cooling air is efficiently guided to the radiator 12, and the cooling efficiency of the radiator can be improved.

FIGS. 5 and 6 show a second embodiment of the vehicle body structure according to the present invention. In this example, the radiator stay 10 attached to the front cross member 21 is
a, and a lower portion of a radiator stay 10b attached to the side member 4b is provided with an extending portion 12, and the lower front portion of the under cover 3 is fastened to the extending portion 12. The other configuration is the same as that of the first embodiment described above.

In the case of such a configuration, the same operation and effect as in the first embodiment can be obtained.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention. For example, the radiator status 1 of the under cover 3
0a, 10b are attached to the radiator
It is not always necessary to be the lower end of a, 10b, and the under cover 3 may be attached to the middle of the radiator stay 10 or 10a, 10b. The radiator stay 10 or 10a, 10b is
Needless to say, the present invention can be applied to a case where the present invention is attached to a vehicle body frame portion other than the a, 4b or the front cross member 21.

[0026]

As described above, the present invention is directed to the radiator side.
When a radiator stay that supports the radiator is provided in the
In both cases, the radiator stay is below the radiator mounting part.
Is provided so that the front portion of the undercover is attached to the extension portion, so that the front portion of the undercover can be attached without using a special bracket, and relatively. The front part of the undercover can be firmly fixed by a radiator stay (a member optimal for a mounting member) that is firmly manufactured. Therefore, the under cover can be securely and firmly mounted with a simple configuration that does not increase the number of parts and increase the weight.

Further, according to the present invention, the front surface of the side wall of the undercover is provided with the inclined surface which is inclined rearward toward the center in the width direction of the undercover. Thereby, the cooling air is efficiently guided to the radiator, and the cooling efficiency of the radiator can be improved.

Furthermore, according to the present invention, since the so tilts the mounting surface of the under cover with respect to the width direction of the under cover, completely Niri off up the vehicle body when mounting the under cover the radiator stay necessary to perform the mounting work without, it is possible to easily perform the mounting operation without completely Niri off up the vehicle from the bottom of the vehicle body, thus making it possible to improve the mounting workability Te .

[Brief description of the drawings]

FIG. 1 is a perspective view of an automobile having a vehicle body structure according to the present invention.

FIG. 2 is a perspective view of an undercover disposed at a front portion of the vehicle body.

FIG. 3 is a perspective view showing a first embodiment of a vehicle body structure of an automobile according to the present invention, and showing a main portion of the vehicle body structure as viewed from the front side.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a perspective view showing a second embodiment of the vehicle body structure of the automobile according to the present invention, and showing a main portion of the vehicle body structure as viewed from the rear side.

6 is a sectional view taken along line BB in FIG.

FIG. 7 is a perspective view showing one embodiment of a conventional vehicle body structure.

FIG. 8 is a sectional view taken along line CC in FIG. 7;

FIG. 9 is a perspective view showing another embodiment of the conventional vehicle body structure.

FIG. 10 is a sectional view taken along line DD in FIG. 9;

FIG. 11 is a perspective view showing still another embodiment of the conventional vehicle body structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body frame 3 Undercover 4a, 4b Side member 5 Bottom wall 6a, 6b Sidewall 7a, 7b Flange 10, 10a, 10b Radiator status 12 Extension part 14 Nut 15 Radiator 17 Projection part 18 Inclined surface 19 Mounting surface 20 Bolt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 2-56753 (JP, U) Japanese Utility Model 2-54662 (JP, U) Japanese Utility Model 1-1171784 (JP, U) Japanese Utility Model 1 123587 (JP, U) Japanese Utility Model Showa 61-95632 (JP, U) Japanese Utility Model Showa 58-115472 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/20 B62D 25 / 08

Claims (3)

(57) [Claims] 1. An automobile body structure in which an undercover is provided below a pair of left and right side members constituting a body frame, a radiator stay for supporting the radiator is provided on a side portion of the radiator, and the radiator is provided.
-Extending from the radiator mounting part to the lower side
A vehicle body structure for a vehicle, wherein a front portion of the undercover is attached to the extension portion . 2. The undercover comprises a bottom wall and side walls erected on both left and right sides of the bottom wall, and protrudes from a front portion of the side wall toward a central portion of the under cover in a width direction. A projecting portion is formed and a part of the projecting portion is provided with a mounting surface to the radiator stay, and a front surface of the projecting portion is provided with an inclined surface that is inclined rearward as it goes toward a central portion in the width direction of the undercover. The vehicle body structure according to claim 1, wherein the vehicle body structure is formed. 3. The vehicle body structure according to claim 1, wherein a mounting surface of the undercover is inclined with respect to a width direction of the undercover.