JPH05193527A - Automotive frame structure - Google Patents

Abstract

PURPOSE:To provide the above automotive frame structure which can sufficiently increase the durability and the installation strength of an engine under guard. CONSTITUTION:Aa for the frame structure of an automobile, an engine under guard 2 for protecting the lower part of an engine is between a pair of cross members 4 and 5 which are laid between a pair of side members 3 and positioned in the vicinity of the engine. The engine under guard 2 is constituted of a pair of first members 6, a pair of second members 7, and a screen board 8, and one edge of the first member is fixed with one cross member, and the other edge is fixed with the side member, and further one edge of the second member is fixed with one cross member or the first member, and fixed with the cross member at the other edge, and the screen board 8 is laid at least between a pair of second members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile frame structure.

[0002]

2. Description of the Related Art Conventionally, in order to protect the engine from contact with stones on the road bounced by wheels or the like and bumpy road surface, a screen board is arranged below the engine.

6 and 7 show a frame structure of a conventional automobile, in which 20 is a side member and 21 is a first member.
A cross member, 22 is a second cross member, and 23 is an engine underguard which is disposed between the first and second cross members 21 and 22 and is located below an engine (not shown).

The engine underguard 23 includes a pair of pipes 24 and 24 which are curved slightly downward, and a screen board 2 which is bridged between the pipes 24 and 24.
It is composed of 5 and.

The screen board 25 of the engine underguard 23 is welded to the pipes 24, 24 at both ends thereof, and the both ends of the pipes 24, 24 are bolts (not shown) on the first and second cross members 21, 22 respectively. It has been fixed using.

[0006]

By the way, in the above-mentioned conventional automobile frame structure, the screen board 25 is connected to the first and second cross members 21, 22 via the pipes 24, 24. For,
It was difficult to set the durability of the engine underguard 23 sufficiently high, and it was also difficult to sufficiently increase the attachment strength of the engine underguard 23.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a frame structure for an automobile capable of sufficiently increasing the durability of an engine arder guard and its mounting strength.

[0008]

According to the present invention, in order to achieve the above-mentioned object, between a pair of cross members which are passed between a pair of side members and which are located in the vicinity of an engine,
In a frame structure of an automobile in which an engine arder guard for protecting the lower part of the engine is arranged,
The engine underguard comprises a pair of first members, a pair of second members and a screen board,
One end of the pair of first members is fixed to one cross member, the other end is fixed to the side member, and one end of the pair of second members is fixed to the one cross member or the first member. While fixing it, fix the other end to the other cross member, and
The screen board is stretched between at least the pair of second members.

[0009]

Embodiments of the frame structure of an automobile according to the present invention will be described below in detail with reference to the accompanying drawings.

1 to 5 show an embodiment of the present invention. In the frame structure of the automobile of this embodiment, the front of the vehicle body frame 1 of the automobile (direction shown by arrow F in FIG. 1)
The engine under guard 2 is installed in the.

The body frame 1 has a pair of left and right side members 3, 3, and first and second cross members 4, 5 are arranged in front of them.

As shown in detail in FIG. 3, the engine underguard 2 is composed of a pair of first members 6 and 6, a pair of second members 7 and 7, a screen board 8 and a pair of reinforcing members 9 and 10. ing.

The pair of first members 6, 6 are largely curved so as to project downward, and one end of each of the pair of second members 7, 7 is welded and fixed in the middle thereof.

A reinforcing member 9 is provided between the first members 6 and 6, and a reinforcing member 10 is provided between the second members 7 and 7.

Further, the front half of the first members 6 and 6 and the second half
A screen board 8 is welded to the lower portions of the members 7, 7.

As shown in FIGS. 4 and 5, the screen board 8 is formed in either a flat surface or a curved surface in accordance with the surface formed by the first members 6 and 6 and the second members 7 and 7. May be.

One end of each of the pair of first members 6 and 6 is fixed to the first cross member 4, and the other end thereof is directly fixed to the pair of side members 3 and 3, respectively.

The other ends of the pair of second members 7, 7 are
It is fixed to each of the second cross members 5.

In this embodiment, the other ends of the pair of first members 6 and 6 are directly fixed to the side frames 3 and 3, and
A pair of second members is provided between the first member and the second cross member.
Since there is a supporting structure for the members 3 connected by the members 7, 7,
A part of the impact load applied to the engine underguard 2 is directly received by the side frames 3 and 3, so that the rigidity of the engine underguard 2 becomes sufficiently high.

Further, the pair of first members 6 and 6 of the engine underguard 2 also serve as a reinforcing member for the side frames by connecting the first cross member 4 and the side frames 3 and 3. Therefore, the weight of the side frame itself can be reduced.

Further, in this embodiment, the rigidity of the engine underguard 2 is increased, and the engine underguard itself vibrates and becomes difficult.
It is also possible to reduce the noise inside the vehicle.

In the above embodiment, the reinforcing members 9 and 1 are
Although 0 is provided, the present invention is not necessary in the present invention and may be provided as needed.

Further, the reinforcing members 9 and 10 are not limited to be arranged in parallel with each other as shown by the solid line in FIG. 3, but may be arranged so as to be crossed with each other as shown by the chain double-dashed line. But of course it's good.

Further, in the above embodiment, the second member 7,
One end of 7 is fixed in the middle of the first members 6 and 6 to form a substantially Y shape, but the present invention is not limited to this, and one end of the second members 7 and 7 is also fixed directly to the first cross member. It may be done. In this case, the screen board 8 may be provided only on the pair of second members.

[0025]

As described above, according to the automobile frame structure of the present invention, the engine underguard is composed of the pair of first members, the pair of second members and the screen board, and the pair of the first members. One end of one member is fixed to one cross member, the other end is fixed to the side member, and further, one end of the pair of second members is fixed to the one cross member or the first member. Since the end is fixed to the other cross member and the screen board is stretched between at least the pair of second members, part of the impact load applied to the engine underguard is directly applied to the side member of the vehicle body frame. It is received and absorbed by the engine, which improves the durability of the engine underguard. Together, it is possible to its attachment strength sufficiently high.

Further, since the rigidity of the engine underguard itself is improved by the above structure, the engine underguard is less likely to vibrate and the noise transmitted to the inside of the vehicle can be reduced.

Further, since the first member of the engine underguard of the present invention connects the first cross member and the side member to increase the rigidity therebetween, it is possible to reduce the weight of the side member.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an automobile frame structure according to the present invention.

FIG. 2 is an enlarged perspective view showing a main part of the embodiment shown in FIG.

FIG. 3 is a perspective view showing an engine underguard of the embodiment shown in FIG.

FIG. 4 is a side view showing a main part of the embodiment shown in FIG.

5 is a side view showing a main part of the embodiment shown in FIG. 1. FIG.

FIG. 6 is an enlarged perspective view showing a main part of a conventional automobile frame structure.

FIG. 7 is a perspective view showing a conventional engine underguard.

[Explanation of symbols]

 1 Body Frame 2 Engine Under Guard 3 Side Frame 4 First Cross Member 5 Second Cross Member 6 First Member 7 Second Member 8 Screen Board

Claims (1)

[Claims] 1. An automobile frame in which an engine underguard for protecting a lower portion of the engine is arranged between a pair of cross members which are provided between the pair of side members and which are located near the engine. In the structure, the engine underguard is composed of a pair of first members, a pair of second members, and a screen board, and one end of the pair of first members is fixed to one cross member and the other end thereof is the side member. Fixed to
Further, one end of the pair of second members is fixed to the one cross member or the first member, and the other end is fixed to the other cross member, and the screen is at least provided between the pair of second members. A frame structure for automobiles, which is characterized in that boards are stretched.