JPH058754A - Front vehicle body structure for vehicle - Google Patents

Abstract

PURPOSE:To restrain rearward movement of a power plant as far as possible upon a vehicle bumping so as to reduce affection upon a cowling part of an engine. CONSTITUTION:A power plant 13 is supported by an engine mount member 18 which extends in a substantially horizontal direction and in the longitudinal direction of a vehicle body, and a support member 20 extending downward from a bumperette 15a in the front part of the vehicle supports the other end of the engine mount member 18 through the intermediary of a coupling part 21 by which the coupling between the members 18, 20 are disengaged by a relative displacement exceeding a predetermined value in the longitudinal direction, thereby it is possible to drop the power plant upon a bump.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in a vehicle in which a power plant is arranged in the front, a front body structure for supporting the power plant is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-176768. Place the engine mount member in the front-rear direction between the frontmost cross member and the front suspension cross member located behind this cross member, and mount at least a part of the power plant on this engine mount member. This structure is known.

[0003]

However, in the front body structure as described above, when the vehicle collides, the power plant moves rearward and hits the cowl portion to deform the cowl portion to the inside of the vehicle compartment. May be affected.

In view of the above circumstances, the present invention provides a front vehicle body structure for a vehicle that suppresses the rearward movement of the power plant during a vehicle collision as much as possible and reduces the influence on the cowl portion of the engine. It is intended.

[0005]

To achieve the above object, a vehicle body structure for a front portion of a vehicle according to the present invention supports at least a power plant by an engine mount member having one end fixed to the vehicle body and extending substantially horizontally in the vehicle body front-rear direction. The other end of the engine mount member is supported by a support member extending downward from a bumper rain at the front of the vehicle through a coupling portion that disengages the two from each other by a relative displacement of a predetermined amount or more in the vehicle front-rear direction. ..

[0006]

In the vehicle body structure for a vehicle as described above, when the front bumper rain retracts by a predetermined amount or more due to the impact at the time of a vehicle collision, the support member provided on the bumper rain and the tip of the engine mount member are By removing the connection by the connecting part of the engine mount member, the support of the tip part of the engine mount member is lost, and the power plant falls due to its weight, and as a result, the rearward movement of the power plant at the time of a vehicle collision is suppressed as much as possible, and the cowl and the vehicle The effect on the indoor side can be reduced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic side structure of a front body structure of a vehicle of one embodiment, and FIG. 2 shows a schematic plan structure.

A vehicle 10 has a power plant 13 including an engine E, a transmission T, etc. installed in an engine room 12 formed in a front portion of a vehicle body 11. A passenger compartment 14 is provided behind the engine room 12. Is provided.

A front bumper 15 is arranged laterally at the front end of the vehicle body 11. The front bumper 15 has a U-shaped cross section and has a U-shaped cross section. Front side frame 1
6,16 tips are connected. In the connection structure of the both, the connecting member 1 extended from the bumper rain 15a
7,17 are firmly connected to the tips of the front side frames 16,16.

The power plant 13 installed in the engine room 12 has the front side frame 1
It is supported by 6, 16 and engine mount member 18. The engine mount member 18 extends substantially horizontally in the front-rear direction of the vehicle body, and as will be described later in detail, the front end portion 18a of the engine mount member 18 has a predetermined amount on a support member 20 extending downward from the bumper rain 15a. It is supported via the coupling portion 21 that separates by the above relative movement,
The rear end portion 18b is rotatably joined to the front end of a bracket 23 installed below the cowl portion 22 behind the engine room 12 via a connecting pin 24, and is fixed to the vehicle body 11.

The front part and the lower part of the rear part of the transmission T of the power plant 13 are supported by the engine mount member 18 by a front mount 26 and a rear mount 27, and both mounts 26, 27 are mounted. Rubber 28 is interposed. Further, both sides of the power plant 13 are supported by the side mounts 29, 29 (see FIG. 4) on the front side frames 16, 16 on both sides, and the mount rubber 30 is also interposed in the side mounts 29. ..

Next, FIG. 3 shows the structure of the connecting portion 21 between the front end portion 18a of the engine mount member 18 and the support member 20 of the bumper rain 15a. The support member 20 has its front end fixed to the rear surface of the bumper rain 15a. A first connecting member is provided at the tip extending downward from the bumper rain 15a and curving downward.
21a is provided, and the first coupling member 21a is formed in a plate shape extending in the front-rear direction. On the other hand, a front end portion 18a of the engine mount member 18 is provided with a second coupling member 21b which extends forward and is curved upward, and which engages with the first coupling member 21a slidably in the front-rear direction. The second coupling member 21b is supported so as to be suspended from the first coupling member 21a. Further, in the joint portion 21, when the bumper rain 15a, that is, the support member 20 moves backward by a predetermined value or more, the engine mount member 18
The second connecting member 21b of the first connecting member 21b of the supporting member 20 is
The lengths of the first coupling member 21a and the second coupling member 21b are set so as to be deviated from a, and further, the coupling strength between them is sufficient to support the weight of the power plant 13. ing.

On the other hand, FIG. 4 shows the structure of the side mount 29 of the power plant 13, and the front side frame 16
A mount bracket 29b attached to the power plant 13 side is connected and supported by a nut 32 fastened by a horizontal bolt 31 to a mount rubber 30 provided on a mount bracket 29a fixed to the. The bolt 32 is cut when the weight dropped by the power plant 13 acts, and the strength of the material, diameter, etc. of the bolt 32 is adjusted so that the power plant support by the side mounts 29, 29 is released. It is set.

According to the structure of the above embodiment, the vehicle
At the time of collision of 10, the front bumper 15 is deformed rearward and moves as shown by an imaginary line in FIG. Bumper rain 15
The movement of the support member 20 associated with the rearward movement of a disengages the first coupling member 21a at the tip of the support member 20 and the second coupling member 21b at the tip of the engine mount member 18.
As a result, the front end portion 18a of the engine mount member 18 is
Is released, the engine mount member 18 rotates about the rear end portion 18b so as to drop downward,
The drop load of the power plant 13 acts on the side mounts 29 on both sides, and the bolts 32 are cut off, so that the power plant
When the power plant 13 loses the force to support it on the vehicle body 11 side and the power plant 13 falls as shown by the imaginary line, the amount of rearward movement is reduced, and the amount of entry from the cowl portion 22 into the passenger compartment 14 is small and the occupant is small. Impact on

The structure of the connecting portion 21 between the supporting member 20 and the engine mount member 18 is usually strong enough to support the power plant 13, but the connection between the supporting member 20 and the engine mount member 18 is disengaged when the relative movement exceeds a predetermined value. If so, the structure is not limited to the structure of the above-described embodiment, and for example, a support structure using a pin and an elongated hole can be appropriately adopted. Further, although the tip end of the engine mount member 18 is supported so as to be suspended from the support member 20, the tip end of the engine mount member 18 may be supported so as to be mounted on the tip end of the support member 20.

Further, in the above embodiment, the rear end portion of the engine mount member 18 is rotatably connected to the bracket 23 by the connecting pin 24, but the rear end portion is rotatable. It is not limited to such a connecting structure, but may be a structure that is simply connected to the vehicle body side as long as it is deformed downward when the power plant falls.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a front body structure of a vehicle according to an embodiment of the present invention.

FIG. 2 is a schematic plan configuration diagram of the vehicle body structure.

FIG. 3 is a perspective view showing a structural example of a coupling portion.

FIG. 4 is a perspective view showing a structure example of a side mount.

[Explanation of symbols]

 10 Vehicle 13 Power plant 15 Front bumper 15a Bumper rain 16 Front side frame 18 Engine mount member 20 Supporting member 21 Coupling 22 Cowl

Claims (1)

Claim: What is claimed is: 1. A front vehicle body of a vehicle, wherein a power plant arranged at a front portion of the vehicle body is supported at least by an engine mount member having one end fixed to the vehicle body and extending substantially horizontally in a vehicle longitudinal direction. In the structure, the other end of the engine mount member is supported by a support member extending downward from a bumper rain at the front of the vehicle through a coupling portion that disengages the two from each other by a relative displacement of a predetermined amount or more in the vehicle front-rear direction. The front body structure of the vehicle characterized by the above.