JP2022103639A - Vehicle body structure and vehicle - Google Patents

Abstract

To provide a vehicle body structure and a vehicle, which can suppress vibration and breaking of a bumper beam while suppressing an increase in weight of the vehicle as much as possible.SOLUTION: A vehicle body structure includes: a bumper beam which is fixed to a front end of a chassis frame and extends in a vehicle width direction; a reinforcement member which is provided in a cab and extends toward the bumper beam; and a first vibration attenuation member which is provided between the bumper beam and the reinforcement member.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to vehicle body structures and vehicles.

Conventionally, a vehicle in which a bumper beam is provided in front of a vehicle body in order to reduce damage at the time of a head-on collision with another vehicle or the like is known (see, for example, Patent Document 1).

FIG. 1 is a top view schematically showing an example of a conventional vehicle body structure (specifically, a vehicle body structure of a front portion of a vehicle). As shown in FIG. 1, the bumper beam 14 is provided at the front end of the ladder frame 11 to which the right front wheel 12 and the left front wheel 13 are attached. Further, the bumper beam 14 is provided so as to extend in the vehicle width direction (vertical direction in the drawing).

In this vehicle body structure, the bumper beam 14 vibrates due to the vibration transmitted from the ladder frame 11. Further, when an impact is applied to the bumper beam 14 from the direction of the arrow shown in FIG. 1, the end portion of the bumper beam 14 may be broken.

In order to suppress the vibration and breakage of the bumper beam 14 described above, it is conceivable to reinforce the bumper beam 14 by using a highly rigid steel material. For example, it is conceivable to provide a steel material in the bumper beam 14 along the stretching direction, or to connect the back surface side of the bumper beam 14 and the ladder frame with the steel material.

Japanese Unexamined Patent Publication No. 2019-13101

However, if a steel material for reinforcing the bumper beam 14 is mounted on the vehicle, the weight of the vehicle is greatly increased. As a result, the kinetic performance and fuel efficiency of the vehicle are deteriorated.

An object of one aspect of the present disclosure is to provide a vehicle body structure and a vehicle capable of suppressing vibration and bending of a bumper beam while suppressing an increase in the weight of the vehicle as much as possible.

The vehicle body structure according to one aspect of the present disclosure includes a bumper beam fixed to the front end of the chassis frame and extended in the vehicle width direction, a reinforcing member provided in the cab and extended toward the bumper beam, and the bumper beam. It has a first vibration damping member provided between the reinforcing member and the reinforcing member.

The vehicle according to one aspect of the present disclosure has a vehicle body structure according to the above-mentioned one aspect of the present disclosure.

According to the present disclosure, it is possible to suppress the vibration and breakage of the bumper beam while suppressing the increase in the weight of the vehicle as much as possible.

Top view schematically showing an example of a conventional vehicle body structure Side view schematically showing the vehicle and the vehicle body structure according to the embodiment of the present disclosure. Top view schematically showing the vehicle body structure shown in FIG. An enlarged view schematically showing the portion a shown in FIG. An enlarged view schematically showing a modified example of the portion a shown in FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to FIGS. 2 to 4. The components common to FIGS. 2 to 4 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 2 is a side view schematically showing the vehicle V and the vehicle body structure 100 of the present embodiment. FIG. 3 is a top view schematically showing the vehicle body structure 100 of FIG. FIG. 4 is an enlarged view schematically showing a portion a (a portion near the left end portion of the bumper beam 5) of FIG. In FIGS. 2 to 4, the double-headed arrow A indicates the vehicle length direction, the double-headed arrow B indicates the vehicle height direction, and the double-headed arrow C indicates the vehicle width direction. Of the two directions indicated by the double-headed arrow A, the right direction indicates the front of the vehicle V, and the left direction indicates the rear of the vehicle V.

The vehicle V shown in FIG. 2 is, for example, a passenger car. The vehicle V is not limited to this, and may be a commercial vehicle such as a bus or a truck.

As shown in FIG. 2, in the vehicle V, a rudder frame 1 (an example of a chassis frame) to which wheels (reference numerals are omitted) and a cab 2 arranged above the rudder frame 1 (not shown) forming a vehicle interior (not shown) are , Are connected via a plurality of mounts 3 (an example of a third vibration damping member). As shown in FIG. 3, the mount 3 is provided on the mounting portion 8 connected to the ladder frame 1.

Further, as shown in FIG. 2, between the rudder frame 1 and the cab 2, the cab 2 and the rudder frame 1 do not interfere with each other while the vehicle V is traveling in the portion where the mount 3 is not provided. A gap 4 is formed for this purpose.

The mount 3 is a member that attenuates the vibration of the ladder frame 1 (for example, vibration generated while traveling on a rough road, vibration generated by driving an engine, etc.). Examples of the material of the mount 3 include, but are not limited to, an elastic material such as rubber. By providing the mount 3, it is possible to suppress the vibration of the ladder frame 1 from being transmitted to the cab 2. In the present embodiment, the shape of the mount 3 is cylindrical, but the shape is not limited to this.

As shown in FIG. 2, the vehicle V has a vehicle body structure 100 in front of the vehicle V.

As shown in FIGS. 2 and 3, the vehicle body structure 100 includes a bumper beam 5, a reinforcing member 6, and a vibration damping member 7 (an example of a first vibration damping member).

The bumper beam 5 is fixed to the front end of the ladder frame 1 and extends in the vehicle width direction.

The reinforcing member 6 is provided in the cab 2 and extends toward the bumper beam 5. The tip portion of the reinforcing member 6 is arranged on the back surface side of the bumper beam 5. The reinforcing member 6 may be integrally formed with the cab 2. Further, the material of the reinforcing member 6 may be the same as the material of the cab 2.

The vibration damping member 7 is provided between the bumper beam 5 and the reinforcing member 6. More specifically, the vibration damping member 7 is provided between the front surface of the reinforcing member 6 and the rear surface of the bumper beam 5.

As a method of fixing the vibration damping member 7, for example, fastening with bolts / nuts can be used. For example, as shown in FIG. 4, a bolt 9 through which a bolt hole (not shown) provided in each of the bumper beam 5, the vibration damping member 7, and the reinforcing member 6 is inserted from the inside of the bumper beam 5, and the inside of the reinforcing member 6. By using the nut 10 provided on the side, the vibration damping member 7 can be fixed between the bumper beam 5 and the reinforcing member 6.

As a result, the front surface of the reinforcing member 6 and the rear surface of the bumper beam 5 are connected via the vibration damping member 7. The vibration damping member 7 may be fixed between the bumper beam 5 and the reinforcing member 6 by means other than the bolt 9 and the nut 10.

The vibration damping member 7 is a member that damps the vibration of the bumper beam 5 (vibration generated by transmission from the ladder frame 1). The vibration damping member 7 is lighter than the steel material. Examples of the material of the vibration damping member 7 include, but are not limited to, an elastic material such as rubber, as in the case of the mount 3.

In the above, the fixing method has been described with reference to FIG. 4 showing the configuration near the left end portion of the bumper beam 5, but the configuration near the right end portion of the bumper beam 14 is also the same as in FIG.

As described above, the vehicle body structure 100 of the present embodiment is fixed to the front end of the rudder frame 1 and extended in the vehicle width direction, and is provided in the cab 2 and extended toward the bumper beam 5. It is characterized by having a reinforcing member 6 and a vibration damping member 7 provided between the bumper beam 5 and the reinforcing member 6.

With this feature, it is possible to suppress the vibration and breakage of the bumper beam 5 while suppressing the increase in the weight of the vehicle V as much as possible.

Therefore, it is possible to suppress deterioration of the kinetic performance and fuel efficiency of the vehicle V.

Further, since the vibration of the bumper beam 5 can be suppressed, it is not necessary to take a large gap 4 between the cab 2 and the rudder frame 1.

Further, since the breakage of the bumper beam 5 can be suppressed, the function of the bumper beam 5 (the function of receiving an impact) can be reliably exerted.

Further, it is possible to suppress the vibration of the bumper beam 5 from being transmitted to the cab 2.

It should be noted that the present disclosure is not limited to the description of the above embodiment, and various modifications can be made without departing from the spirit of the present embodiment.

For example, in the embodiment, the case where the vibration damping member 7 is provided only between the bumper beam 5 and the reinforcing member 6 has been described, but the present invention is not limited to this. FIG. 5 shows another installation example of the vibration damping member 7. FIG. 5 is an enlarged view schematically showing a modified example of the portion a shown in FIG. In FIG. 5, the same reference numerals are given to the components common to those in FIGS. 2 to 4.

For example, as shown in FIG. 5, a vibration damping member 7 (an example of a second vibration damping member) may be provided inside the bumper beam 5. In that case, as shown in FIG. 5, the vibration damping member 7 in the bumper beam 5 may be provided adjacent to the vibration damping member 7 between the bumper beam 5 and the reinforcing member 6.

The vehicle body structure and vehicle of the present disclosure are useful for vehicle body structures and vehicles equipped with a bumper beam fixed to a chassis frame.

1 Ladder frame 2 Cab 3 Mount 4 Gap 5 Bumper beam 6 Reinforcing member 7 Vibration damping member 8 Mounting part 9 Bolt 10 Nut 11 Ladder frame 12 Right front wheel 13 Left front wheel 14 Bumper beam 100 Body structure V vehicle

Claims (5)

A bumper beam fixed to the front end of the chassis frame and extended in the vehicle width direction,
A reinforcing member provided in the cab and extended toward the bumper beam, and
It has a first vibration damping member provided between the bumper beam and the reinforcing member.
Body structure. The front surface of the reinforcing member and the rear surface of the bumper beam are connected via the first vibration damping member.
The vehicle body structure according to claim 1. Further having a second vibration damping member provided in the bumper beam so as to be adjacent to the first vibration damping member.
The vehicle body structure according to claim 1 or 2. Further having a third vibration damping member connecting the chassis frame and the cab.
The vehicle body structure according to any one of claims 1 to 3. A vehicle having the vehicle body structure according to any one of claims 1 to 4.

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