KR20160126736A - Bumper beam unit for vehicles - Google Patents

Bumper beam unit for vehicles Download PDF

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Publication number
KR20160126736A
KR20160126736A KR1020150058197A KR20150058197A KR20160126736A KR 20160126736 A KR20160126736 A KR 20160126736A KR 1020150058197 A KR1020150058197 A KR 1020150058197A KR 20150058197 A KR20150058197 A KR 20150058197A KR 20160126736 A KR20160126736 A KR 20160126736A
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KR
South Korea
Prior art keywords
beam member
bumper beam
bumper
curvature
open
Prior art date
Application number
KR1020150058197A
Other languages
Korean (ko)
Other versions
KR101689573B1 (en
Inventor
김동섭
이문용
Original Assignee
주식회사 성우하이텍
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Application filed by 주식회사 성우하이텍 filed Critical 주식회사 성우하이텍
Priority to KR1020150058197A priority Critical patent/KR101689573B1/en
Publication of KR20160126736A publication Critical patent/KR20160126736A/en
Application granted granted Critical
Publication of KR101689573B1 publication Critical patent/KR101689573B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/24—

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

A bumper beam unit for a vehicle is disclosed. A bumper beam unit for a vehicle according to an embodiment of the present invention is a bumper beam unit for a vehicle that is assembled to a side member on a vehicle body side through the stays in a state where stays are fastened to both sides of a rear side of the bumper beam, A front beam member having an open front end opened at a rear end thereof and a front end open at a rear end thereof and being formed at a curvature smaller than a curvature of the front beam member and inserted through an open rear side of the front beam member, And a rear beam member disposed so as to be in contact with a front surface of the front surface of the front beam member at a rear side of the front beam member, the staple penetrates both longitudinal ends of the rear beam member and has a front end joined to the rear surface of the front beam member, Respectively.

Description

[0001] DESCRIPTION [0002] BUMPER BEAM UNIT FOR VEHICLES [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper beam unit for a vehicle, and more particularly, to a bumper beam unit for a vehicle that improves frontal collision performance and offset collision performance by constructing a bumper beam with two beams having different curvatures.

Generally, a bumper in a vehicle is a shock absorber installed at the front and rear of a vehicle so that when a vehicle collides with another vehicle or a fixed body, the shock is absorbed to secure passengers' safety while minimizing the deformation of the vehicle body .

In the bumper, bumper beams arranged in the vehicle width direction on the front and rear sides of the vehicle are connected to the stairs to constitute a bumper beam unit, and the bumper beam unit is mounted on the side member on the vehicle side through the stator.

Further, an energy absorber for absorbing an impact force is disposed in front of the bumper beam, and a bumper cover is installed so as to surround the bumper beam and the energy absorber.

Fig. 1 is a perspective view of a bumper beam unit for a vehicle according to the prior art, and Fig. 2 is a sectional view of a bumper beam applied to a bumper beam unit for a vehicle according to the prior art.

1 and 2, the bumper beam unit 100 is mounted on a vehicle body side 101 in a state where a stator 103 (or a crash box) is fastened to both rear sides of a bumper beam 101 (in the case of a front bumper) Member (not shown).

The bumper beam unit 100 may be provided with a reinforcing member (not shown) on the upper side of the central portion of the bumper beam 101 for ensuring collision performance and preventing under-riding phenomenon during rigidity reinforcement and collision.

However, in the conventional bumper beam unit 100, a single curvature R is formed by a single beam, so that impact force applied to the center portion of the bumper beam 101 is transmitted to both directions of the bumper beam 101 at the time of frontal collision of the vehicle. When the impact force is applied, bending or deformation of the central portion C largely occurs due to the impact force concentrated on the central portion C of the bumper beam 101, thereby deteriorating the front impact performance.

2, when the end face of the bumper beam 101 is a closed end face, the connection section in which the stamper 103 contacts the bumper beam 101 is small, so that in a situation such as an offset collision, There are disadvantages.

In the embodiment of the present invention, the two beams having different curvatures are arranged at the front and rear sides so as to be in contact with each other at the center, and are fixed at the rear ends of both ends so that the impact force is dispersed in two directions at the time of frontal collision, A bumper beam unit for a vehicle that minimizes an impact force transmitted to a vehicle body by increasing a connection section for absorbing an impact force through the stator.

In one or more embodiments of the present invention, a bumper beam unit for a vehicle is assembled to a side member on the vehicle body side through the stays in a state in which stays are fastened to both rear sides of the bumper beam, The front beam member having an open opening end and formed with a predetermined curvature and an open end having an open rear end, is formed with a curvature smaller than the curvature of the front beam member, inserted through the open rear side of the front beam member, And a rear beam member disposed so as to be in contact with a front surface of the rear surface of the beam member, wherein the staple penetrates both longitudinal ends of the rear beam member and has a front end joined to the rear surface of the front beam member, A bumper beam unit for a vehicle may be provided.

In addition, the rear beam member may be formed with through holes at both ends in the longitudinal direction through which the stairs are inserted.

Also, the rear beam member may be bonded to the outer periphery of the through-hole and one side of the staple with the staple inserted through the through-hole.

Further, the rear pipe member may be formed with a forming portion protruding rearward along the front longitudinal direction.

In addition, the rear beam member may be curved so as to overlap over the entire length of the longitudinal beam member in a state of being inserted through the open rear side of the front beam member having a certain curvature.

In addition, the front beam member may have bent ends in the vertical direction at both ends in the vertical direction.

In addition, the rear beam member may have bent ends in the vertical direction at both ends in the vertical direction.

The front collision performance and the offset collision performance can be improved by disposing the front and rear beams having different curvatures at the front and rear sides so as to be in contact with each other at the center and fixing them to the vehicle body at the rear ends of both ends.

That is, at the time of frontal collision, the impulsive force is dispersed in two directions to alleviate concentration at the central portion, so that the bending and deformation amount of the central portion can be reduced and the collision performance can be improved.

Further, at the time of an offset collision, by increasing the connecting section for absorbing the impact force through the stays connected to the front and rear beam members, it is possible to minimize the impact force transmitted to the vehicle body, thereby preventing deformation of the vehicle body.

Further, by improving the collision performance, the thicknesses of the front and rear beam members can be variously changed, and weight reduction can be induced.

1 is a plan view of a bumper beam unit for a vehicle according to the prior art.
2 is a cross-sectional view of a bumper beam applied to a bumper beam unit for a vehicle according to the prior art.
3 is a planar projection view of a bumper beam unit for a vehicle according to an embodiment of the present invention.
4 is a cross-sectional view taken along line AA in Fig.
5 is a sectional view taken along the line BB in Fig.
6 is an exploded perspective view of a bumper beam unit for a vehicle according to an embodiment of the present invention.
7 is a stress distribution diagram according to a prior art crash test (RCAR CENTER BARRIER TEST) of a bumper beam unit for a vehicle according to an embodiment of the present invention.
8 is a table showing the amount of bumper beam climbing and the amount of permanent deformation of the bumper beam unit for a vehicle according to the prior art and the embodiment of the present invention in accordance with a front impact test.
9 is a stress distribution chart according to an offset collision test (RCAR 40% OFFSET BARRIER TEST) of a bumper beam unit for a vehicle according to the prior art and the embodiment of the present invention.
10 is a table showing barrier penetration amount and side member deformation amount according to the offset collision test of the bumper beam unit for a vehicle according to the prior art and the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the present invention is not limited to the illustrated embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention. .

In order to clearly illustrate the embodiments of the present invention, parts that are not related to the description are omitted.

FIG. 3 is a plan view of a bumper beam unit for a vehicle according to an embodiment of the present invention, and FIG. 6 is an exploded perspective view of a bumper beam unit for a vehicle according to an embodiment of the present invention.

3 and 6, a bumper beam unit 10 for a vehicle according to an embodiment of the present invention basically comprises a bumper beam 1, 3) to a side member (not shown) on the vehicle body side.

In the bumper beam unit 10 according to the embodiment of the present invention, first, the bumper beam 1 is composed of the front beam member 5 and the rear beam member 7 having different curvatures R1 and R2.

That is, the front beam member 5 is formed to have a first curvature R1 having a certain curvature and having an open end whose rear side is opened.

At this time, the front beam member 5 is formed with vertically bent ends 5a at both ends in the up and down direction to reinforce its own rigidity in the longitudinal direction.

The rear beam member 7 also has an opening section with its rear side opened like the front beam member 5 and has a second curvature R2 smaller than the first curvature R1 of the front beam member 5 .

Also, the rear tube member 7 has a structure in which a bending end 7a is formed in both the upper and lower ends in the vertical direction as in the case of the front beam member 5 to reinforce its own rigidity in the longitudinal direction.

The rear beam member 7 is formed with a forming unit 9 that protrudes rearward along the front longitudinal direction. The forming unit 9 also has a function of reinforcing the self-rigidity of the rear beam member 7 .

The rear beam member 7 constructed as described above is inserted through the open rear side of the front beam member 5 and is engaged with the front face of the rear beam member 7 on the rear face F1 of the front beam member 5, So that the front beam member 5 and the rear beam member 7 are fixed to each other by the stator 3.

The vertical width W2 of the rear beam member 7 is formed to be smaller than or equal to the vertical width W1 of the front beam member 5 so that the rear beam member 7 can be inserted into the rear inner side of the front beam member 5. [ do.

The front beam member 5 and the rear beam member 7 are connected to each other by a first curvature so as to overlap each other across the longitudinal direction in a state where the rear beam member 7 is inserted through the open rear side of the front beam member 5, R1 and the second curvature R2 are formed.

4 and 5, by the first curvature R1 of the front beam member 5 and the second curvature R2 of the rear beam member 7, as shown in FIG. 4, The rear face F1 of the front beam member 5 and the front face F2 of the rear beam member 7 are kept in contact with each other at the central portion C of the rear beam member 1. [

5, the rear face F1 of the front beam member 5 and the front face F2 of the rear beam member 7 are spaced apart from each other by a predetermined gap G on one side of both ends of the bumper beam 1, Lt; / RTI >

Further, the rear beam member 7 is formed with through holes H through which the stays 3 are inserted at both ends in the longitudinal direction.

The stays 3 are inserted through the through holes H formed at both ends in the longitudinal direction of the rear beam member 7 and the front ends thereof are joined to the rear face F2 of the front beam member 5. [

The stays (3) are joined to the rear beam (7) at one side to form joints at front and rear sides.

That is, the rear beam member 7 is formed so that the circumference of the through hole H and the outer surface of one side of the stays 3 are bonded to each other with the stays 3 inserted through the through holes H, do.

In this case, the joining of the stays 3 to the front beam member 5 and the rear beam member 7 may be performed by a welding method. In particular, the welding may be performed by spot welding, laser welding, CO 2 arc welding, In embodiments of the invention, CO 2 arc welding may be ideal.

Therefore, the bumper beam unit 10 for a vehicle according to the embodiment of the present invention having the above-described structure has a structure in which the front beam member 5 and the rear beam member 7 having different curvatures (R1> R2) The front collision performance and the offset collision performance are improved by arranging the front and rear members so as to be contacted and fixed to the vehicle body at the rear end of both ends to connect to the vehicle body.

FIG. 7 is a stress distribution diagram according to a prior art crash test (RCAR CENTER BARRIER TEST) of the bumper beam unit for a vehicle according to the prior art and the embodiment of the present invention, and FIG. 8 is a stress distribution chart according to the prior art and the bumper beam unit And the amount of permanent deformation of the bumper beam.

7, the impact force applied to the center portion C is dispersed in both directions with respect to the center portion C of the front beam member 5 and the rear beam member 7 in the frontal collision, Thereby reducing the concentration and the amount of bending and deformation of the central portion C, thereby improving the front collision performance.

That is, in the frontal crash test of the vehicle, from the result that the stress distribution at the central portion C of the bumper beam 101 (1) is uniform in the bumper beam 1 of the present invention as compared with the bumper beam 101 of the prior art Improved collision performance can be confirmed.

This is because the stress distribution on the bumper beam 101 (1) of the prior art and the present invention causes the bumper beam 101 of the prior art to be concentrated in the center portion C while the bumper beam 1 of the present invention And the stress is distributed widely to the periphery of the central portion (C).

8, although the bumper beam 1 of the present invention is rather smaller in weight than the bumper beam 101 of the prior art, in the case of deformation, The amount of thrust and the amount of permanent deformation of the bumper beam are remarkably smaller than those of the bumper beam 101 of the bumper beam 101 of FIG.

FIG. 9 is a stress distribution diagram according to an offset collision test (RCAR 40% OFFSET BARRIER TEST) of a bumper beam unit for a vehicle according to the prior art and the embodiment of the present invention. A table showing a barrier intrusion amount and a side member deformation amount according to an offset impact test of a beam unit.

Referring to FIG. 9, at the time of an offset collision, the impact force transmitted to the vehicle body is minimized by increasing the connecting section for absorbing the impact force through the stays 3 connected to the front beam member 5 and the rear beam member 7, Thus preventing deformation of the vehicle body as much as possible.

That is, in the 40% offset collision test of the vehicle, from the result that the stress distribution at one end of the bumper beam 101 (1) is uniform in the bumper beam 1 of the present invention as compared with the bumper beam 101 of the prior art Improved offset collision performance can be confirmed.

This is because the stress distribution on the bumper beam 101 (1) of the prior art and the present invention, the bumper beam 101 of the prior art is stressed at a certain point on one end, while the bumper beam 1 of the present invention This is due to the fact that the stress is distributed widely and uniformly around the periphery of one end.

10, although the bumper beam 1 of the present invention is rather less in weight than the bumper beam 101 of the prior art, The amount of barrier penetration and the amount of deformation of the side member are significantly smaller than that of the bumper beam 101 of FIG.

As described above, the bumper beam unit 10 for a vehicle according to the embodiment of the present invention has improved front and offset collision performance even when the weight is small compared with the prior art. As a result, the front beam member 5 and the rear beam member 7, It is possible to further improve the impact performance, and it is possible to reduce the weight in the same performance range.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

1: Bumper beam
3:
5: front member
7: rear member
5a and 7a:
9: forming section
R1: 1st curvature
R2: second curvature (R1 > R2)
F1: rear face of the front beam member
F2: Front of rear beam member
H: Through hole
C: Center

Claims (13)

A bumper beam unit for a vehicle, which is assembled to a side member on a vehicle body side through the stator in a state in which stays are fastened to both rear sides of the bumper beam,
The bumper beam
A front beam member having an open front end opened at a rear end thereof and a front end open at a rear end thereof and being formed at a curvature smaller than a curvature of the front beam member and inserted through an open rear side of the front beam member, And a rear beam member disposed on the front surface of the front beam member so as to be in contact with the rear surface of the front beam member,
The staple
And the front ends thereof are joined to the back surface of the front beam member and are joined to the rear beam members at one side. The method according to claim 1,
The rear beam member
Wherein the through holes are formed at both longitudinal ends of the bumper beam unit so as to penetrate the stays. 3. The method of claim 2,
The rear beam member
And a periphery of the through hole and one outer surface of the stamper are bonded to each other with the stamper inserted through the through hole. The method according to claim 1 or 2 or 3,
The rear tubing
And forms a forming portion protruding rearward along the front longitudinal direction. The method according to claim 1,
The rear beam member
Wherein a curvature is formed so as to overlap over a longitudinal direction in a state of being inserted through an open rear side of the front beam member having a constant curvature. The method according to claim 1,
The front beam member
And bending ends are formed in both the upper and lower ends in the vertical direction. The method according to claim 1,
The rear beam member
And bending ends are formed in both the upper and lower ends in the vertical direction. A bumper beam unit for a vehicle, which is assembled to a side member on a vehicle body side through the stator in a state in which stays are fastened to both rear sides of the bumper beam,
Wherein the bumper beam is arranged such that the front and rear beam members having different curvatures are mutually contacted with each other at the central portion and the stamper is fixed to both longitudinal ends of the front and rear beam members. 9. The method of claim 8,
The front beam member is formed with an open end whose rear side is opened, is molded with a certain curvature,
Wherein the rear beam member is formed into an open section having an open rear side and is formed with a curvature smaller than the curvature of the front beam member and inserted through the open rear side of the front beam member so that the front surface contacts the rear surface of the front beam member at the center, Through holes are formed at both ends,
Wherein the stator is inserted through each of the through holes of the rear beam member so that the front end thereof is joined to the rear face of the front beam member and the one end thereof is joined around the through hole of the rear beam member. 10. The method according to claim 8 or 9,
The rear tubing
And forms a forming portion protruding rearward along the front longitudinal direction. 10. The method according to claim 8 or 9,
The rear beam member
Wherein a curvature is formed so as to overlap over a longitudinal direction in a state of being inserted through an open rear side of the front beam member having a constant curvature. 9. The method of claim 8,
The front beam member
And bending ends are formed in both the upper and lower ends in the vertical direction. 9. The method of claim 8,
The rear beam member
And bending ends are formed in both the upper and lower ends in the vertical direction.
KR1020150058197A 2015-04-24 2015-04-24 Bumper beam unit for vehicles KR101689573B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150058197A KR101689573B1 (en) 2015-04-24 2015-04-24 Bumper beam unit for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150058197A KR101689573B1 (en) 2015-04-24 2015-04-24 Bumper beam unit for vehicles

Publications (2)

Publication Number Publication Date
KR20160126736A true KR20160126736A (en) 2016-11-02
KR101689573B1 KR101689573B1 (en) 2017-01-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6485606B1 (en) * 2017-08-15 2019-03-20 新日鐵住金株式会社 Bumper beam and vehicle
KR20220087236A (en) * 2020-12-17 2022-06-24 주식회사 성우하이텍 Bumper beam for vehicles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120128988A (en) * 2011-05-18 2012-11-28 성준엽 a Bumper back beam for vehicle
KR20130019221A (en) * 2011-08-16 2013-02-26 주식회사 성우하이텍 Automotive bumper beam unit
KR101327627B1 (en) * 2012-12-03 2013-11-13 정운덕 a Bumper back beam for vehicle
KR101338046B1 (en) * 2012-03-28 2013-12-06 주식회사 성우하이텍 Bumper beam unit for vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120128988A (en) * 2011-05-18 2012-11-28 성준엽 a Bumper back beam for vehicle
KR20130019221A (en) * 2011-08-16 2013-02-26 주식회사 성우하이텍 Automotive bumper beam unit
KR101338046B1 (en) * 2012-03-28 2013-12-06 주식회사 성우하이텍 Bumper beam unit for vehicles
KR101327627B1 (en) * 2012-12-03 2013-11-13 정운덕 a Bumper back beam for vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6485606B1 (en) * 2017-08-15 2019-03-20 新日鐵住金株式会社 Bumper beam and vehicle
US10994681B2 (en) 2017-08-15 2021-05-04 Nippon Steel Corporation Bumper beam and vehicle
KR20220087236A (en) * 2020-12-17 2022-06-24 주식회사 성우하이텍 Bumper beam for vehicles

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