KR101688321B1 - Bumper beam system for vehicle - Google Patents
Bumper beam system for vehicle Download PDFInfo
- Publication number
- KR101688321B1 KR101688321B1 KR1020150092078A KR20150092078A KR101688321B1 KR 101688321 B1 KR101688321 B1 KR 101688321B1 KR 1020150092078 A KR1020150092078 A KR 1020150092078A KR 20150092078 A KR20150092078 A KR 20150092078A KR 101688321 B1 KR101688321 B1 KR 101688321B1
- Authority
- KR
- South Korea
- Prior art keywords
- bumper beam
- crash box
- fastening hole
- bumper
- vehicle
- Prior art date
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Classifications
-
- 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
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- 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
- B60R19/18—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
- B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal
-
- 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
- B60R2019/1833—Structural beams therefor, e.g. shock-absorbing made of plastic material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Vibration Dampers (AREA)
Abstract
The present invention relates to a bumper beam system for a vehicle, which comprises an injection bumper beam having a fastening hole penetrating in the longitudinal direction on both sides thereof, and a crash box provided in the fastening hole of the bumper beam, The bumper beam system according to claim 1, wherein the bumper beam is a bumper beam.
Description
BACKGROUND OF THE
In general, vehicle bumper beams are required to meet the low-speed crash test, which is a regulation item, and the RCAR (IIHS) test. In this case, the demand performance of non-life insurers, which have a great influence on the sales of automobiles, is more demanding than the regulations. Specifically, in RCAR test, we performed two tests, 40%, 10 degree OFFSET BARRIER TEST and BUMPER DUMMY BARRIER TEST, to calculate the repair cost for body damage. Regarding the performance of these bumper beams, they require either a statutory low-speed collision test and a non-life insurer agency test, or only one of them.
On the other hand, in 40% and 10% OFFSET BARRIER TEST of RCAR TEST, which is the performance required by non-life insurers, the bumper beam and crash box must have a structure capable of absorbing maximum impact energy by compression, deformation and destruction. As such, due to the high demand strength of non-life insurers, vehicle makers have applied high-strength composite plastic materials and high-strength steel materials to bumper beams. However, when such a material is applied, the cost increases in proportion to the increase in strength, and the number of bumper beams to be developed must be increased because the performance required by each region is different from that of a non-life insurer.
Therefore, in order to reduce the cost and investment cost of the bumper beam, it is urgent to develop a bumper beam capable of satisfying both regulatory performance and performance required by the insurer at low cost. For reference, the technique of the background of the present invention is disclosed in Japanese Patent No. 10-1327016, Japanese Patent No. 10-1358294, and the like.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle bumper beam system capable of simultaneously satisfying low-speed collision rule performance and non-life insurance company performance at a minimum cost.
Another object of the present invention is to provide a bumper beam system for a vehicle that can improve the impact energy absorbing performance by improving the structure of the bumper beam, thereby ensuring collision stability in a normal temperature environment and a low temperature environment.
As means for solving the above-mentioned technical problem,
The present invention relates to an injection bumper beam having a fastening hole penetrating in both forward and backward directions on both sides thereof; And a crash box provided in the fastening hole of the bumper beam, wherein the crash box is press-fitted into the fastening hole or an insert is injected when the bumper beam is injected.
In this case, the crash box may have a circular or polygonal cross-sectional structure in the form of a hollow tube.
In this case, the crash box may have holes or recesses formed along the circumferential direction.
In this case, the crash box may be made of any one selected from steel, aluminum, and composite plastic materials.
In this case, protrusions may be formed on the inner circumferential surface of the fastening hole.
In this case, a flange may be formed at the rear end of the crash box.
In this case, the bumper beam is composed of a supporting part having a H-shaped cross-sectional structure composed of a composite plastic material including glass fibers, two vertical plates arranged in parallel to each other, and a horizontal plate connecting the two vertical plates; And an energy absorbing part formed at one end of the supporting part.
According to the present invention, the injection bumper beam is assembled and detachable so that the injection bumper beam alone is applied to a region requiring only a low-speed collision rule performance, and a bumper beam and a crash box By applying it together, it is possible to drastically reduce development investment cost and vehicle cost.
In addition, by improving the structure of the bumper beam, it is possible to reduce the processing cost by applying the composite plastic material to the injection molding method, and to secure dimensional and performance stability at room temperature and low temperature environment.
1 is a perspective view of a bumper beam system for a vehicle according to a preferred embodiment of the present invention,
Fig. 2 is an exploded perspective view of the automotive bumper beam system shown in Fig. 1,
3 is an enlarged view of a press-fitting fastening structure of a crash box constituting the bumper beam system for a vehicle shown in Fig. 1, Fig.
FIG. 4 is a view showing a crash box of the bumper beam system for a vehicle shown in FIG. 1;
Fig. 5 is a view showing a body fastening structure of the bumper beam system for a vehicle shown in Fig. 1,
6 is a plan view of a bumper beam constituting a bumper beam system for a vehicle according to a preferred embodiment of the present invention,
7 is a cross-sectional view taken along the line AA in Fig. 6,
8 is a view showing a modified example of the energy absorbing portion of the bumper beam shown in Fig. 7;
FIGS. 9 and 10 are diagrams showing a result of a structural analysis of a conventional bumper beam system for a vehicle,
FIG. 11 and FIG. 12 are views showing a structural analysis result of a bumper beam system for a vehicle according to a preferred embodiment of the present invention. FIG.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.
FIG. 1 is a perspective view of a bumper beam system for a vehicle according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of the bumper beam system for a vehicle shown in FIG. 1, FIG. 4 is a view showing a crash box of the vehicle bumper beam system shown in FIG. 1, and FIG. 5 is a view showing a body coupling structure of the bumper beam system for a vehicle shown in FIG. 1 .
1 to 5, a vehicle
The
In the present invention, the
The
The
When the
In the meantime, in the present invention, the
On the other hand, when the
In addition, in order to increase the energy absorption efficiency of the
On the other hand, the bumper beam assembly is usually assembled with the cover and then mounted on the vehicle body. It is preferable that the vehicle body fastening nut is attached to the bumper beam in consideration of assembly with the vehicle body. In this case, the insert can be injection-molded, but when the nut is integrally formed, there arises a situation in which it is difficult to assemble with the vehicle body due to a bad fitting dimension due to the posterior deformation due to the environmental temperature. In order to solve this problem, it is a way to reduce the defect by attaching the nut to the bumper beam by correcting the assembly dimensions by post-assembly. Therefore, in the present invention, as shown in FIG. 5, a method of fixing the
The bumper beam and the crash box of the bumper beam system for a vehicle according to the preferred embodiment of the present invention have been described above. Hereinafter, the above-mentioned bumper beam will be described in more detail.
First, the bumper beam according to the present invention is characterized in that the structure is improved so as to apply a long glass fiber reinforced thermoplastic (LFT) containing glass fiber to an injection molding method.
In order to apply the glass fiber composite plastic material to the injection molding method, the bumper beam must absorb the collision energy sufficiently during the collision so that the fracture should not occur. In order to prevent the bumper beam from breaking, it is necessary to increase the elongation or fracture strength of the material considering the dimensional stability and characteristics of the low temperature environment. Increasing the elongation rate of the material degrades the material strength, So that it is difficult to increase the collision energy absorption.
As a result, a bumper beam manufactured by the present injection method is not applicable to a region where a room temperature and a low temperature environment coexist, and a new bumper beam is developed for a certain environment. Therefore, it is urgent to develop an injection bumper beam that can meet the low-speed collision performance of the global area with one bumper beam and have price competitiveness.
On the other hand, the bumper beam absorbs the collision energy sufficiently when the material constituting the bumper beam is sufficiently deformed as a whole to sufficiently absorb the energy and then be broken. However, when the bumper beam is broken, the sheared surface can damage the car body and fail to meet the required regulatory performance. Therefore, the present inventor has researched and developed a structure capable of absorbing the impact energy without collapsing the bumper beam to maximize the structure of the bumper beam as follows.
Hereinafter, the bumper beam will be described based on the above description.
Fig. 6 is a plan view of a bumper beam constituting a bumper beam system for a vehicle according to a preferred embodiment of the present invention, Fig. 7 is a sectional view taken along the line AA in Fig. 6, Fig.
Referring to FIGS. 6-8, the
The supporting
The supporting
Also, since the
In this case, the distance between the
Further, in order to smoothly take out the molded article during the injection molding of the
On the other hand, in the upper and lower inner spaces formed by the
The
In this case, the
The shape of the
Meanwhile, a
The amount of energy absorbed by the
The bumper beam system for a vehicle according to the preferred embodiment of the present invention has been described above. The present inventors have conducted structural analysis to evaluate the performance of the present invention.
Specifically, the structural analysis of the bumper beam system according to the prior art and the RCAR 40% OFFSET test of the bumper beam system according to the present invention was performed, and the results are shown in FIGS. 9 to 12. FIG. 9 to 12, it can be seen that the bumper beam system according to the present invention has better impact energy absorption rate and smaller penetration amount than the bumper beam system according to the prior art and shows improved performance.
The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.
Therefore, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention. .
100: vehicle bumper beam system 110: bumper beam
111: fastening hole 112: projection
113: nut 114: guide pin
115: Bracket 116: Rivet
120:
123: Horizontal plate 124: Rib
125: X-shaped rib 130: energy absorbing part
131: first plate 132: second plate
133: rib 150: crash box
150a:
151: Flange
Claims (7)
A crash box provided in the fastening hole of the bumper beam; And
A bracket fixedly coupled to the nut and the guide pin; ≪ / RTI >
The crash box having a flange formed at one end thereof is press-fitted into the fastening hole or an insert is injected when the bumper beam is injected,
Wherein the bracket is located on the rear surface of the engagement surface of the bumper beam which prevents the insertion of the flange, and the bumper beam is engaged with the vehicle body by engagement with the nut.
Wherein the crash box has a circular or polygonal cross-sectional structure in the form of a hollow tube.
Characterized in that the crash box has a hole or groove formed along a circumference at a predetermined distance in the depth direction of the crash box so that the outer shape of the crash box is sequentially deformed by an external impact.
Wherein the crash box is made of any one selected from steel, aluminum, and composite plastic materials.
And a projection is formed on an inner circumferential surface of the fastening hole so that the crash box is press-fitted into the fastening hole.
Wherein the bumper beam is made of a composite plastic material including glass fibers,
A support having an H-shaped cross-sectional structure comprising two vertical plates arranged in parallel to each other and a horizontal plate connecting the two vertical plates; And
An energy absorbing part formed at one end of the support part;
The bumper beam system comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150092078A KR101688321B1 (en) | 2015-06-29 | 2015-06-29 | Bumper beam system for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150092078A KR101688321B1 (en) | 2015-06-29 | 2015-06-29 | Bumper beam system for vehicle |
Publications (1)
Publication Number | Publication Date |
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KR101688321B1 true KR101688321B1 (en) | 2016-12-20 |
Family
ID=57734395
Family Applications (1)
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KR1020150092078A KR101688321B1 (en) | 2015-06-29 | 2015-06-29 | Bumper beam system for vehicle |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004189063A (en) * | 2002-12-10 | 2004-07-08 | Kobe Steel Ltd | Energy absorbing member for vehicle body |
KR20090064840A (en) * | 2007-12-17 | 2009-06-22 | 한화엘앤씨 주식회사 | Bumper sysytem |
KR20120061072A (en) * | 2010-11-05 | 2012-06-12 | 현대모비스 주식회사 | Bumper back-beam for vehicle |
JP2012153254A (en) * | 2011-01-26 | 2012-08-16 | Showa Denko Kk | Shock absorbing member for vehicle |
-
2015
- 2015-06-29 KR KR1020150092078A patent/KR101688321B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004189063A (en) * | 2002-12-10 | 2004-07-08 | Kobe Steel Ltd | Energy absorbing member for vehicle body |
KR20090064840A (en) * | 2007-12-17 | 2009-06-22 | 한화엘앤씨 주식회사 | Bumper sysytem |
KR20120061072A (en) * | 2010-11-05 | 2012-06-12 | 현대모비스 주식회사 | Bumper back-beam for vehicle |
JP2012153254A (en) * | 2011-01-26 | 2012-08-16 | Showa Denko Kk | Shock absorbing member for vehicle |
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