WO2020179816A1

WO2020179816A1 - Bumper support structure

Info

Publication number: WO2020179816A1
Application number: PCT/JP2020/009112
Authority: WO
Inventors: 雄三増島; 宏二木下
Original assignee: いすゞ自動車株式会社
Priority date: 2019-03-07
Filing date: 2020-03-04
Publication date: 2020-09-10
Also published as: JP7156101B2; CN113613958B; CN113613958A; PH12021552122A1; JP2020142686A

Abstract

A bumper support structure S includes: a vehicle body frame 1 that extends in the height direction of a vehicle and has a lower end thereof fixed to the upper surface of a side frame F extending in the forward-backward direction of the vehicle; an upper bumper 2 extending in the vehicle width direction of the vehicle in front of or behind of the vehicle body frame 1; a bracket 4 that connects the upper bumper 2 to the vehicle body frame 1 as a result of one end of the bracket being fixed to the upper bumper 2 and the other end being fixed to the vehicle body frame 1 at a position different from the position of said one end in the height direction; and a support member 5 that is provided between the upper bumper 2 and the vehicle body frame 1 in the forward-backward direction of the vehicle, the support member suppressing the movement of the upper bumper 2 towards the vehicle body frame 1.

Description

Bumper support structure

The present disclosure relates to a bumper support structure for a vehicle.

Conventionally, the vehicle is provided with a bumper support structure that supports the bumper. In Patent Document 1, a bumper facer whose lower wall is fixed to the lower surface of the first cross member and whose upper wall is fixed to the upper retainer is provided between the upper retainer and the hood lock stay. A bumper mounting structure having a bracket is disclosed.

JP-A-6-316244

When a vehicle provided with a bumper support structure having a lower bumper and an upper bumper collides with a pedestrian, the upper bumper may move to the rear of the lower bumper. In this case, the upper bumper moves behind the lower bumper, so that when the vehicle collides with a pedestrian, the impact from the peripheral part of the lower bumper hits a part of the pedestrian intensively. Therefore, the problem that the impact given to a pedestrian becomes large occurred.

Therefore, the present disclosure has been made in view of these points, and an object thereof is to provide a bumper support structure that reduces an influence on a pedestrian who has collided with a vehicle.

In the first aspect of the present disclosure, a vehicle body frame extending in the height direction of the vehicle and having a lower end fixed to the upper surface of the side frame extending in the front-rear direction of the vehicle, and the vehicle body frame. In the front or rear, the upper bumper extending in the vehicle width direction and one end are fixed to the upper bumper, and the other end is fixed to the vehicle body frame at a position different from the one end in the height direction. The upper bumper is provided between the bracket for connecting the upper bumper to the vehicle body frame and the upper bumper and the vehicle body frame in the front-rear direction of the vehicle, and the upper bumper faces the vehicle body frame. A bumper support structure is provided, which has a supporting member that suppresses the movement of the bumper.

Further, it further has a lower bumper which is fixed to the front end or the rear end of the side frame and extends in the vehicle width direction of the vehicle below the upper bumper, and the bracket is the bracket of the upper bumper. The upper bumper is connected to the vehicle body frame in a state where the surface opposite to the vehicle body frame side and the surface of the lower bumper opposite to the vehicle body frame side are at the same position in the front-rear direction of the vehicle. May be.

Also, the support member may extend in the front-rear direction of the vehicle with one end fixed to the upper bumper. The other end of the support member may be in contact with the vehicle body frame by pushing the upper bumper toward the vehicle body frame.

Further, the bracket has the other end fixed to the vehicle body frame below the one end, and has an inclined region that is inclined downward between the one end and the other end. Good.

The support member may have a first end fixed to the upper bumper and a second end opposite to the first end. A clearance is provided between the second end of the support member and the vehicle body frame, and the upper bumper of the support member faces rearward in the front-rear direction of the vehicle. It may be configured to come into contact with the vehicle body frame when pushed by the user.

According to the present disclosure, in the bumper support structure, the effect on the pedestrian who has collided with the vehicle is reduced.

FIG. 1 shows a structure of a bumper support structure according to this embodiment. FIG. 2 is a cross-sectional view of the upper bumper, the lower bumper, and the bumper cover.

<Structure of bumper support structure S>
FIG. 1 is a diagram showing a structure of a bumper support structure S according to the present embodiment.
The vehicle has a side frame F and a bumper support structure S. The side frame F is a member that extends in the front-rear direction of the vehicle. The side frame F has, for example, a U-shaped cross section. Two side frames F are provided in parallel in the vehicle width direction of the vehicle.

The bumper support structure S is a structure that supports the upper bumper 2 on the vehicle. The bumper support structure S includes a body frame 1, an upper bumper 2, a lower bumper 3, a bracket 4, and a support member 5.

The vehicle body frame 1 is a frame that constitutes the vehicle body. The body frame 1 is a member that extends in the height direction of the vehicle and has a lower end fixed to the upper surface of the side frame F. The vehicle body frame 1 is provided in front of or behind the vehicle body. In this embodiment, the vehicle body frame 1 is provided in front of the vehicle body.

The upper bumper 2 is a member that protects the vehicle body, occupants, and external objects by cushioning the impact when the vehicle collides with external objects. The upper bumper 2 is a member extending in the vehicle width direction of the vehicle in front of or behind the vehicle body frame 1. In the present embodiment, the upper bumper 2 is a member extending in the vehicle width direction of the vehicle in front of the body frame 1.

Similar to the upper bumper 2, the lower bumper 3 is a member for protecting the vehicle body, the occupant, and the external object by softening the impact when the vehicle collides with an external object. The lower bumper 3 is a member fixed to the front end or the rear end of the side frame F and extending in the vehicle width direction below the upper bumper 2. In this embodiment, the lower bumper 3 is a member fixed to the front end of the side frame F and extending in the vehicle width direction below the upper bumper 2.

One end of the bracket 4 is fixed to the upper bumper 2, and the other end is fixed to the vehicle body frame 1 at a position different from the one end in the height direction of the vehicle, so that the upper bumper 2 is connected to the vehicle body frame 1. It is a member that does. Specifically, the bracket 4 has one end fixed to the upper bumper 2 and the other end fixed to the vehicle body frame 1 below the one end. In the present embodiment, the bracket 4 has a front end fixed to the upper bumper 2 and a rear end fixed to the front surface of the vehicle body frame 1 below the front end.

The bracket 4 has an inclined area 41. The inclined region 41 is a region that is inclined downward between one end and the other end. In the present embodiment, the inclined region 41 is a region in which the rear end is inclined downward between the front end and the rear end.

The bumper support structure S has such a bracket 4 having one end and the other end provided at different positions in the height direction of the vehicle and having an inclined region 41, so that the bracket 4 is placed on the vehicle body frame 1 and above. When fixing to the bumper 2, it becomes easy to secure a space for using a tool. Therefore, in the bumper support structure S, workability in fixing the upper bumper 2 to the vehicle via the bracket 4 is improved. However, when the bracket 4 has the inclined region 41, when a force is applied to the upper bumper 2 from the front of the vehicle, the upper bumper 2 easily moves rearward. Therefore, the bumper support structure S has the support member 5.

The support member 5 is provided between the upper bumper 2 and the vehicle body frame 1 in the front-rear direction of the vehicle, and is a member that suppresses the upper bumper 2 from moving toward the vehicle body frame 1. In this embodiment, the support member 5 is provided between the upper bumper 2 and the vehicle body frame 1 in the front-rear direction of the vehicle, and is a member that suppresses the upper bumper 2 from moving rearward. The support member 5 may be configured as a member separate from the bracket 4.

By having such a support member 5, the bumper support structure S has a structure in which the bracket 4 has an inclined region 41, but when a vehicle collides with a pedestrian, the upper bumper 2 moves to the vehicle body frame 1. It is possible to suppress the movement toward. Therefore, according to the bumper support structure S, when a pedestrian collides with a vehicle, the pedestrian comes into contact with both the upper bumper 2 and the lower bumper 3, so that it is difficult for the pedestrian to concentrate on one place. Become. As a result, a part of the body (for example, lower limbs) of the pedestrian that collides with the vehicle is less likely to be damaged, and thus safety for the pedestrian is improved.

　One end of the support member 5 is fixed to the upper bumper 2. The other end of the support member 5 comes into contact with the vehicle body frame 1 when the upper bumper 2 is pushed toward the vehicle body frame 1. A clearance is provided between the other end of the support member 5 and the vehicle body frame 1. In the present embodiment, the rear end of the support member 5 contacts the front surface of the vehicle body frame 1 when the upper bumper 2 is pushed rearward. Therefore, the bumper support structure S can prevent the upper bumper 2 from moving toward the vehicle body frame 1 by contacting the other end of the support member 5 with the vehicle body frame 1 when the vehicle collides with a pedestrian. it can. The other end of the supporting member 5 may be provided above the vehicle and ahead of the vehicle with respect to the other end of the bracket 4.

Further, the bracket 4 is on the upper side in a state where the surface of the upper bumper 2 opposite to the vehicle body frame 1 side and the surface of the lower bumper 3 opposite to the vehicle body frame 1 side are in the same position in the front-rear direction of the vehicle. The bumper 2 is connected to the vehicle body frame 1. In this embodiment, the bracket 4 connects the upper bumper 2 to the vehicle body frame 1 in a state where the front surface of the upper bumper 2 and the front surface of the lower bumper 3 are at the same position in the front-rear direction of the vehicle.

By having such a bracket 4, the bumper support structure S makes it easy for the pedestrian to come into contact with both the upper bumper 2 and the lower bumper 3 when the pedestrian collides with the vehicle. It is hard to apply shock to the.

The support member 5 extends in the front-rear direction of the vehicle with one end fixed to the upper bumper 2. In this embodiment, the support member 5 extends in the front-rear direction of the vehicle with its front end fixed to the upper bumper 2. By having such a support member 5, the bumper support structure S can more easily suppress the upper bumper 2 from moving backward in response to an impact from the front of the vehicle on the upper bumper 2.

<Modification 1>
FIG. 2 is a cross-sectional view of the upper bumper 2, the lower bumper 3, and the bumper cover 6.
The bumper support structure S has a bumper cover 6. The bumper cover 6 is provided in front of the upper bumper 2 and the lower bumper 3 and has an area extending in the height direction of the vehicle. In the bumper support structure S, the length between the rear end of the support member 5 and the front surface of the vehicle body frame 1 may be different depending on the strength of the bumper cover 6.

That is, as the support members 5, a plurality of support members 5 having different lengths in the front-rear direction of the vehicle are prepared, and the plurality of support members 5 having different lengths in the front-rear direction of the vehicle are prepared according to the strength of the bumper cover 6. One support member 5 may be selected from the above, and the selected one support member 5 may be used for the bumper support structure S.

Specifically, for example, when the strength of the bumper cover 6 is the first value, the length between the rear end of the support member 5 and the front surface of the vehicle body frame 1 is set as the first length, and the bumper cover 6 When the strength is a second value larger than the first value, the length between the rear end of the support member 5 and the front surface of the vehicle body frame 1 is defined as the second length larger than the first length. ..

That is, as the support members 5, a plurality of support members 5 having different lengths in the front-rear direction of the vehicle are prepared, and the greater the strength of the bumper cover 6, the more the support members 5 having different lengths in the front-rear direction of the vehicle. One support member 5 having a smaller length in the front-rear direction of the vehicle is selected from among them, and one support member 5 having a smaller length in the front-rear direction of the vehicle is used for the bumper support structure S. You can

By having such a structure, the bumper support structure S makes it possible to adjust the size of the clearance between the support member 5 and the vehicle body frame 1 according to the ease of deformation of the bumper cover 6. Therefore, the bumper support structure S makes it possible to adjust the size of the clearance between the support member 5 and the vehicle body frame 1 in this way, so that when a pedestrian collides with the vehicle according to the bumper cover 6. The pedestrian can be adjusted so as to easily contact both the upper bumper 2 and the lower bumper 3.

<Modification 2>
In the above embodiment, the bumper support structure S is shown as a structure provided in front of the vehicle in the front-rear direction, but is not limited to this. The bumper support structure S may be a structure provided behind the vehicle.

<Effects of the bumper support structure S according to the present embodiment>
The bumper support structure S according to the present embodiment extends in the vehicle height direction, and has a body frame 1 whose lower end is fixed to the upper surface of a side frame F extending in the vehicle front-rear direction, and a body frame. In front of 1, the upper bumper 2 extending in the vehicle width direction of the vehicle is provided. In the bumper support structure S, the front end is fixed to the upper bumper 2 and the rear end is fixed to the vehicle body frame 1 at a position different from the front end in the vehicle height direction. It has a bracket 4 connecting to 1. Further, the bumper support structure S is provided between the upper bumper 2 and the vehicle body frame 1 in the front-rear direction of the vehicle, and has a support member 5 that restrains the upper bumper 2 from moving toward the vehicle body frame 1. ..

The bumper support structure S according to the present embodiment is provided between the upper bumper 2 and the vehicle body frame 1 in the front-rear direction of the vehicle in this way, and suppresses the upper bumper 2 from moving toward the vehicle body frame 1. The supporting member 5 is provided. Therefore, by having such a support member 5, the bumper support structure S has a structure in which the bracket 4 has an inclined region 41, but when the vehicle collides with a pedestrian, the upper bumper 2 is a vehicle body. It is possible to suppress the movement toward the frame 1. Therefore, according to the bumper support structure S, when a pedestrian collides with a vehicle, the pedestrian comes into contact with both the upper bumper 2 and the lower bumper 3, so that it is difficult for the pedestrian to concentrate on one place. Become. As a result, a part of the body (for example, lower limbs) of the pedestrian that collides with the vehicle is less likely to be damaged, and thus safety for the pedestrian is improved.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist thereof. is there. For example, all or part of the apparatus can be functionally or physically distributed/integrated in arbitrary units and configured. Further, a new embodiment that occurs due to an arbitrary combination of a plurality of embodiments is also included in the embodiments of the present invention. The effect of the new embodiment produced by the combination also has the effect of the original embodiment.

This application is based on a Japanese patent application filed on March 7, 2019 (Japanese Patent Application 2019-41415), the contents of which are incorporated herein by reference.

The present invention has the effect of reducing the impact on pedestrians that have collided with the vehicle, and is useful for vehicle bumper support structures and the like.

F... Side frame S... Bumper support structure 1... Body frame 2... Upper bumper 3... Lower bumper 4... Bracket 41... Inclined area 5... Support member 6... ..Bumper covers

Claims

A vehicle body frame that extends in the height direction of the vehicle and whose lower end is fixed to the upper surface of the side frame that extends in the front-rear direction of the vehicle.
An upper bumper extending in the vehicle width direction in front of or behind the vehicle body frame, and
One end is fixed to the upper bumper, and the other end is fixed to the vehicle body frame at a position different from the one end in the height direction, thereby connecting the upper bumper to the vehicle body frame,
A support member provided between the upper bumper and the vehicle body frame in the front-rear direction of the vehicle and suppressing the upper bumper from moving toward the vehicle body frame.
Bumper support structure characterized by having.
Fixed to the front end or the rear end of the side frame, further has a lower bumper extending in the vehicle width direction of the vehicle below the upper bumper,
In the bracket, the surface of the upper bumper opposite to the body frame side and the surface of the lower bumper opposite to the body frame side are in the same position in the front-rear direction of the vehicle, Characterized in that the upper bumper is connected to the body frame,
The bumper support structure according to claim 1.
The support member is characterized in that one end thereof is fixed to the upper bumper and is extended in the front-rear direction of the vehicle.
The bumper support structure according to claim 1 or 2.
The other end of the support member comes into contact with the vehicle body frame when the upper bumper is pushed toward the vehicle body frame.
The bumper support structure according to any one of claims 1 to 3.
The bracket is characterized in that the other end is fixed to the vehicle body frame below the one end, and has an inclined region that is inclined downward between the one end and the other end. ,
The bumper support structure according to any one of claims 1 to 4.
The support member is
A first end fixed to the upper bumper,
A second end opposite to the first end,
A clearance is provided between the second end portion of the support member and the vehicle body frame, and the second end portion of the support member is configured such that the upper bumper faces rearward in the front-rear direction of the vehicle. The bumper support structure according to claim 1, wherein the bumper support structure is configured to be in contact with the vehicle body frame when pushed.