JP3127696B2 - Car bumper mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a bumper mounting structure for an automobile, for example, as shown in Japanese Patent Application Laid-Open No. 63-97450, a reinforcement having a substantially arcuate shape in plan view is provided in at least one pair of bumper stays in the vehicle front-rear direction. A structure has been proposed which is attached to a mounting end of a body strength member extending.

[0003]

However, in the conventional vehicle bumper mounting structure, since the vehicle body strength member is vertically offset with respect to the bumper stay, the moment between them increases due to the impact energy at the time of collision. However, the body strength member to be crushed may fall and break. Therefore, the present invention has been made in view of the above points, and an object of the present invention is to transmit an initial input at the time of a collision to a vehicle body strength member as a linear input that does not generate a rotational moment, thereby providing an impact energy. It is intended to provide a bumper mounting structure for an automobile in which crushing with good absorption characteristics is generated.

[0004]

According to a first aspect of the present invention, there is provided a bumper mounting structure for a vehicle, in which a vehicle body strength member extending in the front-rear direction of the vehicle is mounted on both left and right sides of a reinforce having a substantially arcuate shape in plan view. At the end, against the body strength member
A pair of vehicles mounted offset in the vertical direction of the vehicle.
Attach to the vehicle via a bumper stay, and
At the front of the reinforcement at the
A racket is arranged, and the front of the bracket is positioned substantially at the same position as the front of the vehicle in the left-right center of the reinforce and in the front- rear direction of the vehicle.
And end portions extending from the lower end to the rear of the vehicle, respectively,
The one end fixed to the said reinforcement, and is the other <br/> end which characterized by being fixed to the vehicle body strength member. According to the second aspect of the present invention, the lower end of the bumper fascia is fixed to the bracket. According to claim 3 of the present invention, the bumper fascia is the mounting position the reinforcement in the other of said reinforcement, the mounting position of the reinforcement via a respective rib on the front portion of the bracket, before the vehicle
It is intended to be in contact with the person.

[0005]

According to an automobile bumper mounting structure according to claim 1 of the work for the present invention, to the front portion of the bracket Na front substantially the same longitudinal position of the motor vehicle left-right center position of the reinforcement,該Bu
From the upper and lower ends of the front of the racket to the rear of the vehicle, respectively
One end of the end extending to the reinforcement
And the other end is fixed to the vehicle body strength member.
Since that, upon vehicle collision, the initial input by the collision is transmitted to the vehicle body strength member as not translate input of occasions <br/> rolling moment to prevent early breakage of the body strength member, good absorption characteristics of impact energy Causes crushing. Claim 2 of the present invention
According to the bumper mounting structure of the automobile, since the lower end of the bumper fascia is fixed to the bracket,
The weight can be reduced. According to the vehicle bumper mounting structure of claim 3 of the present invention, the bumper fascia comprises:
At a position other than the mounting position of the reinforce , the front surface of the bracket is mounted on the front surface of the bracket via a rib .
Since it Luo contact, in which the input to the bumper is transmitted immediately to the reinforcement in the event of a collision.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. Referring to FIGS. 1 to 6, as a vehicle bumper mounting structure according to one embodiment of the present invention,
, A bumper stay 2, a side stay 3 as a vehicle body strength member, a bracket 4, and a bumper fascia 5. The reinforce 1 has a substantially arcuate shape in plan view, and is formed in a shell shape by the front member 11 and the rear member 12. The bumper stay 2 is configured such that a front end 22 of a main body 21 extending in the vehicle front-rear direction is supported by a rear member 12 of the reinforce 1 by welding SW, and
1 has a round hole 24 at the rear end 23 and a notch 2
5 are formed. The side stay 3 as the vehicle body strength member is formed in a U-shaped cross section extending in the vehicle front-rear direction, and has bolts 32, 32 protruding from the mounting end 31. The bracket 4 has a front surface portion 41 which is substantially the same front and rear position as a front position of the reinforcement 1 at the left and right center positions of the vehicle, and an upper end portion 42 is fixed to the reinforcement 1 by welding SW and a lower end portion 43. A bolt 44 is screwed to a nut 34 on the lower surface 33 of the side stay 3 as the vehicle body strength member. A piece 45 is fixed to the lower portion of the bracket 4 by welding SW, and is attached to the lower end 5 of the bumper fascia 5.
1 is fixedly provided by a clip 52.

The rear surface 53 of the bumper fascia 5
In a position corresponding to the front member 11 of the reinforce 1 as shown in FIG. 4, the front member 11 of the reinforce 1 is attached to the bracket 4 as shown in FIG.
At a position corresponding to the front surface portion 41, the bracket 4 comes into contact with the front surface portion 41 of the bracket 4 via ribs 54 and 55, respectively. According to the present embodiment, the front portion 41 of the bracket 4 is located at substantially the same front and rear position as the front position of the front member 11 of the reinforce 1 at the left and right center positions of the vehicle, and therefore, as shown in FIG. At the time of collision, bracket 4
And the front portion of the front member 11 of the rain force 1 collides simultaneously with the front position of the vehicle, so that the initial input due to the collision has no rotational moment Mz.
The translational input is transmitted to the side stay 3 as the vehicle body strength member, thereby preventing the side stay 3 as the vehicle body strength member from being initially broken. Also, as shown in FIGS. 1 and 2 , the bumper stay 2 and the lower end 43 of the bracket 4 receive a load at the same time and cancel the moment Mx around the bolt 32, so that the shock energy absorption characteristics are good. Causes crushing. In addition, as shown in FIG. 1, the lower end 51 of the bumper fascia 5 is fixed to the piece 45 of the bracket 4, so that a heavy member does not have to be used.
The weight can be reduced accordingly. The bumper fascia 5 is a front member 1 of the reinforce 1.
1 at the position corresponding to the front member 11 of the reinforce 1, and at the position corresponding to the front surface 41 of the bracket 4, the ribs 54, 5.
5, the input to the bumper fascia 5 is immediately transmitted to the reinforce 1 at the time of a collision.

[0008]

As is evident from the foregoing description, the bumper mounting structure for an automobile according to claim 1 of the present invention, to the front portion of the bracket Na front substantially the same longitudinal position of the motor vehicle left-right center position of the reinforcement, the bracket The top and bottom of the front
One end of the end extending to the rear of the vehicle
Fixed to the reinforce and the other end of the vehicle
Since it is fixed to the body strength member, at the time of collision of the vehicle, the initial input due to the collision is transmitted to the vehicle body strength member as a translational input having no rotational moment, and the initial breakage of the vehicle body strength member is prevented, and the impact energy absorbing property is good. Crushing can occur. In the bumper mounting structure for a vehicle according to the second aspect of the present invention, since the lower end of the bumper fascia is fixed to the bracket, the weight can be reduced. In the bumper mounting structure for a vehicle according to claim 3 of the present invention, the bumper fascia is attached to the reinforce except for the mounting position of the reinforce , and the bracket of the bracket is mounted to the reinforce at the mounting position of the reinforce .
It comes into contact with the front part from the front of the vehicle via the respective ribs
Therefore , in the event of a collision, the input to the bumper fascia can be immediately transmitted to the reinforcement.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line AA of FIG. 2 in a vehicle bumper mounting structure according to one embodiment of the present invention.

FIG. 2 is an explanatory plan view of FIG. 1;

FIG. 3 is an exploded perspective view of the reinforcement and the bracket of FIG. 1;

FIG. 4 is a cross-sectional view taken along line BB of FIG. 2;

FIG. 5 is an operation explanatory view at the time of a collision in FIG. 2;

FIG. 6 is an operation explanatory view at the time of a collision in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 reinforcement 2 bumper stay 3 side stay as body strength member 4 bracket 5 bumper fascia 31 mounting end 41 front 42 upper end 43 lower end

Claims (3)

(57) [Claims] 1. A left and right side portion of a reinforce having a substantially arcuate shape in a plan view is attached to a mounting end of a vehicle body strength member extending in a vehicle front-rear direction in a vehicle vertical direction with respect to the vehicle body strength member.
A pair of offset bumper stays
Through, in bumper mounting structure for an automobile mounting the vehicle, rain Four in the mounted position of the reinforcement
A bracket on the front side of the
The rain force of the car left and right center position in front and in front of the car
It is located at the same position in the rear direction and
Ends extending rearward from the upper and lower ends of the front part
With one end fixed to the reinforce
And, and a bumper mounting structure for an automobile in which the other end is characterized by being fixed to the vehicle body strength member. 2. The vehicle bumper mounting structure according to claim 1, wherein a lower end of the bumper fascia is fixed to the bracket. 3. The bumper fascia is provided on the reinforce at a position other than the mounting position of the reinforce.
Before the of the bracket at the mounting position of the reinforcement
3. The vehicle bumper mounting structure according to claim 1 , wherein the surface portion is in contact with the front side of the vehicle via a rib.