CN112319411A - Front offset collision energy absorption structure of automobile - Google Patents
Front offset collision energy absorption structure of automobile Download PDFInfo
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- CN112319411A CN112319411A CN202011098329.8A CN202011098329A CN112319411A CN 112319411 A CN112319411 A CN 112319411A CN 202011098329 A CN202011098329 A CN 202011098329A CN 112319411 A CN112319411 A CN 112319411A
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- automobile
- shotgun
- end plate
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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
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention aims to provide a front offset collision energy absorption structure of an automobile, which is used for improving the safety of the automobile in offset collision. The invention discloses a front offset collision energy absorption structure of an automobile, which comprises a front protective beam, a front longitudinal beam and a shotgun, and is characterized in that the front end of the front longitudinal beam is fixedly connected with the front end of the shotgun through a transverse connecting beam, and the end part of the front protective beam is respectively and fixedly connected with the front end of the front longitudinal beam, the front end of the shotgun and the transverse connecting beam through an energy absorption box assembly. The front offset collision energy absorption structure of the automobile can not only absorb collision energy and transfer the collision energy to the front longitudinal beam of the automobile, but also convert collision force into transverse acting force to push the automobile collision barrier, thereby greatly reducing the possibility of deformation and invasion of a passenger compartment.
Description
Technical Field
The invention belongs to the technical field of automobile structures, and particularly relates to a front structure of an automobile body.
Background
At present, the automobile safety evaluation system is various in the world, and the evaluation regulations mainly comprise E-NCAP, US-NCAP, IIHS, J-NCAP, C-NACP and the like, wherein the safety regulations in North America are comprehensively and strictly known, for example, a rigid wall collision experiment with 25% overlap of 64km/h speed, which is newly added in IIHS regulations, is also called a small offset collision experiment (see figure 1), the regulations are more strict than other regulations at present, and a plurality of vehicle types with outstanding performance in the current regulations are not used in the experiment. The 25% overlap results in no collision overlap area between the front longitudinal beam and the rigid barrier, the impact of the front longitudinal beam on deformation energy absorption in the collision area is very small, and the collision energy is mainly absorbed by the tire, shotgun (shotgun is the longitudinal beam for mounting the front fender on the automobile and is on the outermost side of the cabin) and deformation of the passenger cabin, so that the collision energy can invade and press the living space of the passenger, and the passenger is injured and killed.
The Chinese C-NACP evaluation standard is also updated every three years in a period, 2021 version C-NACP proposes MPDB (50 km/h 50% overlap collision) working condition to replace ODB (64 km/h 40% overlap deformable collision wall) working condition so as to more comprehensively examine the compatibility of two-vehicle collision, so that the vehicle can protect the passengers of the vehicle and reduce the damage to the other vehicle in collision, and the requirement is that the deformation uniformity of the barrier of the other vehicle is considered when the structure of the front part of the frame is designed, and the 630mm immersion amount of the barrier is prevented within the range of 40mm to 40 mm.
Disclosure of Invention
The invention aims to provide a front offset collision energy absorption structure of an automobile, which is used for improving the safety of the automobile in offset collision.
The invention discloses a front offset collision energy absorption structure of an automobile, which comprises a front protective beam, a front longitudinal beam and a shotgun, and is characterized in that the front end of the front longitudinal beam is fixedly connected with the front end of the shotgun through a transverse connecting beam, and the end part of the front protective beam is respectively and fixedly connected with the front end of the front longitudinal beam, the front end of the shotgun and the transverse connecting beam through an energy absorption box assembly. When the automobile is subjected to front side collision (particularly small offset collision), the collision force applied to the automobile by the barrier is absorbed by the front protective beam and the energy absorption box assembly behind the front protective beam, the impact of the collision force on the shotgun is reduced through the deformation of the energy absorption box, the collision force transmitted to the shotgun is transmitted to the front longitudinal beam through the transverse connecting beam, the front longitudinal beam with high rigidity participates in the absorption of the collision energy and bears most of the collision energy, and the shotgun only bears less collision energy, so that the damage degree of the shotgun is reduced, the passenger compartment can be protected from being deformed and invaded, and the reduction of the injury to passengers is facilitated.
Preferably, the energy absorption box assembly is composed of an energy absorption box rear end plate and a frame-shaped structure fixed on the front end face of the energy absorption box rear end plate, and the length of the energy absorption box assembly in the vehicle length direction is gradually reduced from the inner side end of the vehicle to the outer side end of the vehicle. The frame-shaped structure can absorb collision energy through deformation, and also can generate a certain guiding effect through an asymmetric structure, so that the collision force part in front can be converted into a transverse acting force in the middle direction of the automobile, the automobile can generate a transverse kinetic energy, and the automobile can move towards the middle direction of the automobile through the acting force and reaction force principle and is far away from a collision barrier, so that the front cabin is protected from deformation.
Preferably, the frame shape structure is formed by two slot type boards butt joint, the both sides cell wall of slot type board all is equipped with the bending segment, and above-mentioned bending segment can effectively strengthen the intensity of frame shape structure, according to calculating, its section force can promote about 10% with regular quadrangle coming, corresponds the promotion of 1 st stage acceleration value, reduces 2 nd stage acceleration's peak value, also can increase simultaneously in MPDB operating mode with the barrier Y to the coincidence area, does benefit to the barrier uniform deformation, avoids deducting.
Preferably, a transverse connecting piece is further fixed on the front end face of the rear end plate of the energy absorption box, and the transverse connecting piece extends from the inner side end of the rear end plate of the energy absorption box to the outer side end of the rear end plate of the energy absorption box. The transverse connecting piece can strengthen the rigidity of the energy absorption box assembly and guide the collision force to the direction of the front longitudinal beam of the automobile.
Preferably, the transverse connecting beam is composed of a trough-shaped part and a front end plate, the trough-shaped part is clamped between the front longitudinal beam and the shotgun, and the front end plate is located at the front ends of the front longitudinal beam and the shotgun and is fixedly connected with the front longitudinal beam, the shotgun and the trough-shaped part respectively. The channel-shaped piece, the front end plate, the front longitudinal beam and the shotgun form a hollow cavity structure, the structural stability is greatly enhanced, and the direction of the collision force to the front longitudinal beam of the automobile is favorably guided.
Preferably, the outer side face of the front longitudinal beam is connected with the rear end face of the channel profile through a triangular diagonal support piece, and the width of the triangular diagonal support piece is gradually reduced from one side of the front longitudinal beam to the shotgun direction. The triangular diagonal support piece increases the connection stability between the groove-shaped piece and the front longitudinal beam and is beneficial to guiding the collision force to the direction of the front longitudinal beam of the automobile through the bevel edge when collision occurs. More importantly, the cross section area of the triangular diagonal support piece in the vehicle length direction is gradually reduced from the front longitudinal beam to the shotgun direction, so that the triangular diagonal support piece is developed from one side of the shotgun and gradually towards the front longitudinal beam when the triangular diagonal support piece is collapsed and deformed under the action of collision force, and the automobile can move towards the middle of the automobile and is far away from a collision barrier to protect the front cabin from deformation.
Preferably, in order to improve the strength of the triangular diagonal bracing piece, the section of the triangular diagonal bracing piece is groove-shaped, and when the triangular diagonal bracing piece is assembled with the front longitudinal beam and the groove-shaped piece, a cavity structure with stable structure is formed.
Preferably, the front end plate is fixedly connected with the rear end plate of the energy absorption box through bolts.
Preferably, the front side surface of the end part of the front protective beam is an inclined surface, and the inclined surface is gradually inclined backwards from the side of the middle part of the automobile to the direction of the outer side of the automobile. When the end part of the front protective beam contacts the barrier, the inclined plane can convert part of collision force into transverse acting force towards the middle direction of the automobile, so that the automobile moves towards the middle direction of the automobile and is far away from the collision barrier.
The front offset collision energy absorption structure of the automobile can not only absorb collision energy and transfer the collision energy to the front longitudinal beam of the automobile, but also convert collision force into transverse acting force to push the automobile collision barrier, thereby greatly reducing the possibility of deformation and invasion of a passenger compartment.
Drawings
FIG. 1 is a schematic view of a 25% small offset bump.
FIG. 2 is a schematic view of the front offset crash energy absorbing structure of an automobile of the present invention during a 25% low offset crash test.
Fig. 3 is an overall structural view of the front offset collision energy absorbing structure of example 1.
Fig. 4 is a schematic structural view of a front bumper beam in embodiment 1.
Fig. 5 is an exploded view of the front fender beam in example 1.
Fig. 6 is a cross-sectional view a-a of fig. 4.
Fig. 7 is a cross-sectional view B-B of fig. 4.
Fig. 8 is a schematic structural view of the front side member in embodiment 1.
Fig. 9 is an exploded view of the front side member 2 in example 1.
Fig. 10 is a cross-sectional view C-C of fig. 8.
The figures are numbered: 1. a front bumper beam; 2. a front longitudinal beam; 3. shotgun; 4. a transverse connecting beam; 41. a channel member; 42. a front end plate; 5. an energy absorption box assembly; 51. a rear end plate of the energy absorption box; 52. a trough plate; 53. a transverse connector; 6. a triangular diagonal stay member; 7. and (4) a barrier.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
Example 1:
the embodiment provides a front offset collision energy absorption structure of an automobile, which is used for improving the safety of the automobile in offset collision.
As shown in fig. 3, the front offset crash energy absorption structure of the automobile of the embodiment includes a front protective beam 1, a front longitudinal beam 2 and a shotgun3, wherein the front end of the front longitudinal beam 2 is fixedly connected with the front end of the shotgun3 through a transverse connecting beam 4, and the end of the front protective beam 1 is fixedly connected with the front end of the front longitudinal beam 2, the front end of the shotgun3 and the transverse connecting beam 4 through an energy absorption box assembly 5; the outer side face of the front longitudinal beam 2 is connected with the rear end face of the transverse connecting beam 4 through a triangular diagonal support member 6, and the width of the triangular diagonal support member 6 is gradually reduced from one side of the front longitudinal beam 2 to the shotgun3 direction. Of course, the two sides of the front end of the automobile are symmetrical structures, and the description is omitted here.
As shown in fig. 4 to 7, in the present embodiment, the energy absorption box assembly 5 includes an energy absorption box rear end plate 51 and a frame structure welded and fixed on a front end surface of the energy absorption box rear end plate 51, the frame structure is formed by two groove-shaped plates 52 in butt joint, and both side groove walls of the two groove-shaped plates 52 are provided with bending sections; the length of the energy absorption box assembly 5 in the vehicle length direction is gradually reduced from the inner side end of the vehicle to the outer side end of the vehicle; the front end face of the energy-absorbing box rear end plate 51 is further fixedly welded with a transverse connecting piece 53, the transverse connecting piece 53 extends from the inner side end of the energy-absorbing box rear end plate 51 to the outer side end of the energy-absorbing box rear end plate 51, the cross section of the transverse connecting piece 53 is groove-shaped, and the transverse connecting piece 53 and the rear end plate are welded and fixed to form a long-strip-shaped cavity structure. The energy absorption box assembly 5 is welded and fixed with the rear end face of the front protective beam 1 to form a cavity structure.
As shown in fig. 7 to 10, in the present embodiment, the transverse connecting beam 4 is composed of a groove member 41 and a front end plate 42, and the groove member 41 is sandwiched between the front longitudinal beam 2 and the shotgun3, and is welded and fixed to the front longitudinal beam 2 and the shotgun3, respectively; the front end plate 42 is located at the front end of the front longitudinal beam 2 and the shotgun3, and is welded and fixed with the front longitudinal beam 2, the shotgun3 and the trough member 41 respectively. The channel-shaped part 41 forms a cavity structure with the front end plate 42, the front longitudinal beam 2 and the shotgun 3. In order to improve the strength of the triangular diagonal support member 6, the section of the triangular diagonal support member 6 is in a groove shape, and when the triangular diagonal support member 6 is welded with the front longitudinal beam 2 and the groove-shaped member 41, a cavity structure with a stable structure is formed.
The front end plate 42 is fixedly connected with the energy absorption box rear end plate 51 through bolts.
In this context, the inner side surface refers to a side near the center of the vehicle, and the outer side surface refers to a side near the outer side of the vehicle.
As shown in fig. 2, in a front side collision (especially a small offset collision) of a vehicle, a collision force applied to the vehicle by the barrier 7 is firstly absorbed by the front bumper beam 1 and the energy-absorbing box assembly 5 behind the front bumper beam 1, the impact of the collision force on the shotgun3 is reduced by the deformation of the energy-absorbing box, and the collision force transmitted to the shotgun3 is transmitted to the front longitudinal beam 2 through the transverse connecting beam 4, so that the front longitudinal beam 2 with higher rigidity participates in the absorption of the collision energy and bears most of the collision energy, thus the shotgun3 only bears less collision energy, the damage degree of the shotgun3 is reduced, the passenger compartment can be protected from deformation and intrusion, and the injury of passengers is reduced.
The key point is that the special structure of the triangular diagonal support piece 6, the energy absorption box assembly 5 and the front protective beam 1 is adopted in the embodiment, when collision occurs, part of front collision force is converted into transverse acting force towards the middle direction of the automobile, so that the automobile generates transverse kinetic energy, and the automobile moves towards the middle direction of the automobile through the principle of acting force and reacting force and is far away from the collision barrier 7, so that the front cabin is protected from deformation.
The embodiment has been verified by CAE analysis that the vehicle employing the energy absorbing structure has excellent performance in small offset and MPDB experiments.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the invention is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides an energy-absorbing structure is bumped in front portion biasing of car, includes that preceding guarantor's crossbeam, front longitudinal and shotgun, its characterized in that, the front end of front longitudinal passes through transverse connection roof beam fixed connection with shotgun's front end, the tip of preceding guarantor's crossbeam passes through energy-absorbing box assembly respectively with front end, shotgun's front end and transverse connection roof beam fixed connection of front longitudinal.
2. The front offset crash energy absorbing structure of an automobile according to claim 1, wherein the energy absorbing box assembly is composed of a rear end plate of the energy absorbing box and a frame-shaped structure fixed on a front end surface of the rear end plate of the energy absorbing box, and the length of the energy absorbing box assembly in the automobile length direction is gradually reduced from an inner end of the automobile to an outer end of the automobile.
3. The automobile front offset crash energy absorber structure according to claim 2, wherein said frame-shaped structure is formed by two channel-shaped plates butt-jointed, and both side channel walls of said channel-shaped plates are provided with bent sections.
4. The automobile front offset crash energy absorber structure according to claim 3, wherein a transverse connecting member is further fixed to the front end face of the rear end plate of the energy absorber box, and the transverse connecting member extends from the inner end of the rear end plate of the energy absorber box to the outer end of the rear end plate of the energy absorber box.
5. The front offset crash energy absorbing structure according to claim 1, 2, 3 or 4, wherein said transverse connecting beam is composed of a channel member and a front end plate, said channel member is sandwiched between said front side member and shotgun, said front end plate is located at the front end of said front side member and shotgun and is fixedly connected with said front side member, shotgun and channel member, respectively.
6. The automobile front offset crash energy absorption structure according to claim 5, wherein the outer side surface of the front side member is connected to the rear end surface of the channel member through a triangular cross-brace member, and the width of the triangular cross-brace member is gradually reduced from one side of the front side member to the shotgun direction.
7. The automobile front offset crash energy absorbing structure according to claim 6, wherein the triangular diagonal stay has a channel shape in cross section.
8. The automobile front offset crash energy absorber structure according to claim 5, wherein said front end plate is fixedly connected to said energy absorber box rear end plate by means of bolts.
9. The automobile front offset crash energy absorber structure according to claim 5, wherein the front side surface of the end portion of the front fender beam is an inclined surface, and the inclined surface is gradually inclined backward from the automobile middle portion side toward the automobile outer side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098329.8A CN112319411A (en) | 2020-10-14 | 2020-10-14 | Front offset collision energy absorption structure of automobile |
| PCT/CN2021/123837 WO2022078455A1 (en) | 2020-10-14 | 2021-10-14 | Front offset collision energy-absorption structure for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098329.8A CN112319411A (en) | 2020-10-14 | 2020-10-14 | Front offset collision energy absorption structure of automobile |
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| Publication Number | Publication Date |
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| CN112319411A true CN112319411A (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011098329.8A Pending CN112319411A (en) | 2020-10-14 | 2020-10-14 | Front offset collision energy absorption structure of automobile |
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| Country | Link |
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| CN (1) | CN112319411A (en) |
| WO (1) | WO2022078455A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113460166A (en) * | 2021-06-30 | 2021-10-01 | 东风汽车集团股份有限公司 | Modular offset touch reinforcing structure |
| WO2022078455A1 (en) * | 2020-10-14 | 2022-04-21 | 奇瑞汽车股份有限公司 | Front offset collision energy-absorption structure for automobile |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115649098B (en) * | 2022-11-30 | 2024-05-28 | 重庆长安汽车股份有限公司 | Vehicle body system and vehicle for improving small offset collision performance |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2022078455A1 (en) | 2022-04-21 |
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