CN109229042B

CN109229042B - Anti-collision beam for automobile

Info

Publication number: CN109229042B
Application number: CN201810947407.3A
Authority: CN
Inventors: 王治
Original assignee: Shanghai Cotech Automotive Engineering Co ltd
Current assignee: Shanghai Cotech Automotive Engineering Co ltd
Priority date: 2018-08-20
Filing date: 2018-08-20
Publication date: 2023-09-29
Anticipated expiration: 2038-08-20
Also published as: CN109229042A

Abstract

The invention relates to an automobile anti-collision beam, which comprises a main beam, an energy absorption box and a flange, wherein the main beam is connected with a front longitudinal beam of an automobile through the flange and a bolt, the energy absorption box is arranged between the main beam and the flange, two mirror-symmetrical side beams are respectively arranged at the left end and the right end of the main beam, each side beam structure is in a hook shape, one end of each hook shape is connected with the main beam, and the other end of each hook shape is suspended and points to a shotgun structure of the automobile body. Compared with the prior art, in the small offset collision process of the automobile, after the automobile is impacted by the collision device, as the two side beams are added on the main beam edge, the length of the whole anti-collision beam is increased, and the yield strength of the two side beam materials is higher than that of the energy-absorbing box, the energy-absorbing box on one side of the collision can firstly collapse to absorb energy, and then the side beam is collapsed and bent to impact the front longitudinal beam. Therefore, the vehicle deviates and the projection surface of the driving passenger along the collision direction deviates from the collision device, so that the injury index of the passenger is reduced, and the safety of the passenger is protected.

Description

Anti-collision beam for automobile

Technical Field

The invention relates to the field of automobile safety, in particular to an automobile anti-collision beam.

Background

With the development of automobile technology and the improvement of people on safety consciousness, the requirements on automobile safety are also higher and higher. There are two collision safety standards, C-NCAP and E-NCAP, for safety testing of 40% overlap collision of vehicles at 64km/h to ensure and evaluate safety of vehicles. In 2017, the China insurance automobile safety index C-IASI regulations compiled by China automobile engineering institute and China insurance research automobile technical institute, wherein a safety test of 25% overlapping collision at a speed of 64km/h is provided, and a new requirement is provided for the safety of automobiles. In the C-NCAP and E-NCAP collision environments, 40% of the offset collision barriers are variable and absorb 30% -40% of the collision energy. While the C-IASI small offset crash barrier is a rigid body that is not deformable and cannot absorb energy during a crash. This is a very demanding new vehicle safety technical requirement for domestic vehicle manufacturers.

As shown in fig. 1, according to the current 25% offset collision specified by the vehicle bumper beam 2, the overlapping amount of the bumper beam 2 and the collision device 1 along the collision direction is only 40-105 mm, and the outer sides of the left and right energy absorption boxes, so that the whole bumper beam 2 and the energy absorption boxes cannot take the effects of collapsing and absorbing energy in the collision process, and the front longitudinal beam 3 connected with the bumper beam 2 does not take the effects of collapsing and absorbing energy, so that almost all the collision energy is directly transmitted to the vehicle body through a shotgun structure in the whole collision process, thereby causing the vehicle body to collapse to reduce the vehicle inner space and injure the driving passengers.

The existing improvement mode is as follows: the arrangement space between the front bumper and the anti-collision beam is enlarged, and a plastic reinforcing bracket or EPP energy absorption foaming is added in the space, so that the energy of the vehicle in the first stage of collision is absorbed; the structural size of the anti-collision beam, the impact strength of steel, the radial length of the energy-absorbing box and the like are increased, and the energy of the second stage in the collision process is absorbed through the bending of the anti-collision beam and the collapse of the energy-absorbing box; the rest energy in the collision process is dispersed through the front longitudinal beam, so that the damage index to the member is reduced. However, these methods require an integral modification of the front end of the entire vehicle, are not suitable for existing vehicles, and are costly to manufacture and require high structural fit and accuracy. Meanwhile, the method cannot ensure that the method can meet new safety standards.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the automobile anti-collision beam, and the automobile can pass through the new safety standard of the C-IASI rule by modifying the existing automobile anti-collision beam, so that the safety of personnel in the automobile is protected, and the damage of the automobile is reduced.

The aim of the invention can be achieved by the following technical scheme:

an anti-collision beam for an automobile comprises a main beam, wherein two side beams in mirror symmetry are arranged at the left end and the right end of the main beam, the structure of each side beam is a hook, one end of each hook is connected with the main beam, and the other end of each hook is suspended and points to a shotgun structure.

Further, the hook type structure of the side beam is of a three-section two-fold structure, the first section is an extension section of the end part of the main beam from one end connected with the main beam, the length is 115-135 mm, the second section forms an angle of 45 degrees with the transverse direction of the vehicle, the length is 110-135 mm, the third section forms an angle of 120-125 degrees with the transverse direction of the vehicle, one end of the third section is connected with the second section, and the other end of the third section is suspended.

Further, the distance from one suspended end of the side beam to the shotgun structure is 15-30 mm.

Further, the side beam is of a three-layer overlapped structure comprising a side front beam mechanism, a reinforcing beam mechanism and a side rear beam mechanism, wherein the cross section shapes of the side front beam mechanism and the side rear beam mechanism are respectively'Type, "-herba Ciliae Dinnis>The openings of the's' type are opposite, and the edges are overlapped and connected, the whole stiffening beam mechanism is wrapped, the cross section of the stiffening beam mechanism is in a transverse 'Chinese character' ji ', and the top ends of the' Chinese character 'ji' are directed to the side front beam mechanism.

Further, the side front beam mechanism and the side rear beam mechanism are made of alloy steel with the model of 590DP and the thickness of 2 mm.

Further, the reinforcing beam mechanism adopts alloy steel with the model of 780DP and the thickness of 2.5 mm.

Further, in the side beam, the side front beam mechanism, the reinforcing beam mechanism and the side rear beam mechanism are connected in a welding mode.

Further, the main beam and the two side beams are connected in a welding mode.

Further, the side beam section is matched with the width and height dimensions of the main beam section.

Further, the main beam is arc-shaped, and the radius of the arc is more than or equal to 2.3m.

Compared with the prior art, the invention has the following advantages:

1. after the automobile is impacted by the collider in the small offset collision process, as the two side beams are added on the main beam edge, the length of the whole anti-collision beam is increased, and the two side beam materials are higher than the energy-absorbing box, the energy-absorbing box on the collision side can firstly collapse to absorb energy, then the side beam collapses and bends to impact the front longitudinal beam, and meanwhile, the automobile deviates and deviates from the collider with the projection surface of the driving passenger along the collision direction, so that the injury index of the passenger is reduced, and the safety of the passenger is protected.

2. In the process of carrying out C-IASI small offset collision test on a vehicle at present, the length of the contact surface of an anti-collision beam and a collision object is only 40-105 mm, the length of the contact surface is increased to 150-200 mm through the extending side beam, the collision area is increased, meanwhile, the side beam is of a two-fold three-section hook-type structure, the side beam is ensured to receive impact at first in the maximum range, and is folded inwards to deform when receiving the impact, and the third section is folded inwards and contacted to absorb and disperse collision energy through a shotgun structure, so that the safety of the vehicle is improved.

3. The side beam is of a three-layer overlapped structure, the anti-collision beam reinforcement beam is arranged between the side front anti-collision beam and the side rear anti-collision beam, and serves as a framework of the side beam to play a supporting role, and the cross section shape of the side front beam mechanism and the cross section shape of the side rear beam mechanism are as follows "The stiffening beam mechanism is arranged in the middle, so that the rigidity of the anti-collision beam is ensured, the structure is reliable, the appearance is attractive, and a good energy absorption effect can be achieved.

4. The side front beam mechanism and the side rear beam mechanism adopt high-strength alloy steel, and the stiffening beam mechanism adopts ultrahigh-strength alloy steel, so that more energy can be absorbed by bending and collapsing in the collision process, and the side front beam mechanism and the side rear beam mechanism are not easy to break due to embrittlement.

5. The invention has simple design structure and less manufacturing and processing procedures, and the side beam structural members are added for protecting members under the condition that the existing vehicle design structure is unchanged, so that the weight of the whole vehicle is increased by 4.2-6.5 Kg, the material cost is increased by 85-165 yuan, but the research and development cost for greatly improving the safety is reduced, the whole cost is saved, and the economic benefit is increased.

Drawings

FIG. 1 is a schematic illustration of a conventional vehicle performing a crash test;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a schematic diagram of an explosive structure according to the present invention;

FIG. 4 is a schematic view of the structure of the present invention assembled on a vehicle body;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a schematic cross-sectional view of a side rail;

FIG. 7 is a schematic diagram of a crash test performed according to an embodiment;

FIG. 8 is a schematic illustration of a collision energy transfer process;

reference numerals: 1. the crash device comprises a crash device 2, an anti-collision beam 3, a front longitudinal beam 4, a shotgun structure 21, a main beam 22, an energy absorption box 221, an energy absorption box upper part 222, an energy absorption box lower part 23, a side beam 231, a side front beam mechanism 232, a reinforcing beam mechanism 233, a side rear beam mechanism 5, a flange 6 and bolts.

Detailed Description

The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.

Example 1

As shown in fig. 2 and 3, the present embodiment provides an automobile anti-collision beam, which includes a main beam 21, an energy absorption box 22 and a flange 5, wherein the main beam 21 is connected with a front longitudinal beam 3 of an automobile through the flange 5 and a bolt 6, and the energy absorption box 22 is arranged between the main beam 21 and the front longitudinal beam 3. At present, the main beams of automobiles are made of various materials and have various manufacturing process types, and are mainly divided into steel high-strength anti-collision beams; steel ultra-high strength anti-collision beam; an aluminum impact beam, and the like. The manufacturing process mainly comprises the following steps: a rolling process and a stamping process; casting process; extrusion process, and the like. The left/right crash box 22 is divided into a crash box upper 221 and a crash box lower 222, and the crash box upper 221 and the crash box lower 222 are connected by welding. The manufacturing process of the upper energy absorption box 221 and the lower energy absorption box 222 adopts stamping, bending, punching and the like. And then welded with the flange 5, the flange 5 is made of high-strength steel, and the manufacturing process comprises blanking, stamping, punching and the like.

Two mirror symmetry side beams 23 are respectively arranged at the left end and the right end of the main beam 21, each side beam 23 is in a hook-shaped structure, one end of the hook-shaped structure is connected with the main beam 21, and the other end of the hook-shaped structure is suspended and points to the shotgun structure 4. The cross section of the side beam 23 is matched with the width and height of the cross section of the main beam 21, the main beam 21 and the two side beams 23 are connected in a welding mode, and all welding processes are completed on the fixture. The main beam 21 is made of alloy steel with the model 590DP and the thickness of 1.8 mm. The width of the main beam 21 is 35mm, the height is 95mm, and the forming process adopts a rolling process. The main beam 21 is arc-shaped, and the radius of the arc is greater than or equal to 2.3m.

As shown in fig. 4 and 5, the hook-shaped structure of the side beam 23 is a three-section two-fold structure, from one end connected with the main beam 21, the first section L1 is an extension section on both sides of the main beam 21, the length is 115mm, the included angle a between the second section L2 and the transverse direction of the vehicle is 45 degrees, the length is 110mm, the included angle b between the third section L3 and the transverse direction of the vehicle is 120 degrees, one end of the hook-shaped structure is connected with the second section L2, and the other end of the hook-shaped structure is suspended. The distance from the suspended end of the third section L3 to the shotgun structure 4 is 20mm. The first section L1 of the side member 23 is inserted into the main beam 21 without interfering with the crash box 22 by an amount not less than 110mm overlapping the main beam 21.

As shown in fig. 6, the side member 23 has a three-layer structure including a side front beam mechanism 231, a reinforcement beam mechanism 232, and a side rear beam mechanism 233, which are stacked in this order, wherein the cross-sectional shapes of the side front beam mechanism 231 and the side rear beam mechanism 233 are both "Type, "-herba Ciliae Dinnis>The openings of the's' shape are opposite, and the edges are overlapped and connected, so that the whole stiffening beam mechanism 232 is wrapped, the cross section of the stiffening beam mechanism 232 is in a transverse 'shape, and the top ends of the' shape are directed to the side front beam mechanism 231. The side front beam mechanism 231 and the side rear beam mechanism 233 are made of alloy steel with the model 590DP and the thickness of 2 mm. The stiffening beam mechanism 232 is formed from an alloy steel of model 780DP and thickness 2.5 mm. The side front beam mechanism 231, the reinforcement beam mechanism 232, and the side rear beam mechanism 233 are connected to each other by welding.

As shown in fig. 7 and 8, the working principle of the present embodiment is:

based on the existing vehicle design: considering the safety of protection members, on the basis of the original design, the side beams 23 are added to the main beams 21 of the anti-collision beam, so that the small offset overlapping area in the CIASI procedure is increased, and meanwhile, the shotgun structure 4 is optimized on the two sides of the engine compartment, namely, a reinforcing rib is arranged between the shotgun structure 4 and the front longitudinal beam 3, and in the small offset collision process, the energy in the first stage in the collision process is absorbed through the bending of the side beams 23 and the collapse of the energy absorption box; at the same time, the front side member 3 is pressed by the bent side member 23, so that the vehicle is deviated from the striker 1 in the vertical collision direction with the occupant, thereby protecting the occupant and reducing the injury index to the occupant. The collision energy of the second stage is absorbed by the contact of the hook-shaped structure of the side beam 23 and the shotgun structure 4, and the front tire pressing; the rest energy in the collision process is transmitted to the upper surface of the vehicle body through two parts of the front longitudinal beam 3, namely the collapse absorption energy and the shotgun structure 4; the upper side reaches the side enclosure through the a-pillar and is transferred to the other side of the vehicle through the roof rail. The lower side is transferred to the other side of the vehicle through the lower surrounding plate and the lower cross beam. Thereby reducing injury to the member during the collision. In this embodiment, the side beams 23 are added to protect members under the condition that the existing vehicle design structure is unchanged, so that the weight of the whole vehicle can be increased, and the added weight is changed according to different vehicle types and is not more than 10 kg. There is also an increase in cost, but no greater than 200 yuan. But it reduces the development costs that are expended in a great amount to improve the safety, and increases the economic efficiency as a whole.

Example two

The girder of this embodiment adopts the alloy steel of model 980DP, thickness 1.8mm, and the width of girder is 45mm, highly is 110mm. The hook type of curb girder is three sections two folding structures, from the one end of being connected with the girder, and first section is the extension section of girder both sides, and length is 135mm, and the second section is 45 degrees angles with the vehicle transversely, and length is 135mm, and the third section is 125 degrees angles with the vehicle transversely, and second section is connected to its one end, and the other end is unsettled, and the distance of unsettled one end on the curb girder to shotgun structure is 30mm, and the other part is the same as embodiment one.

Example III

The girder of the embodiment adopts alloy steel with the model of 1100DP and the thickness of 1.0mm, the width of the girder is 40mm, and the height is 105mm; the hook type of curb girder is three sections two folding structures, from the one end of being connected with the girder, and first section is the extension section of girder both sides, and length is 120mm, and the second section is 45 degrees angles with the vehicle is horizontal, and length is 120mm, and the third section is 123 degrees angles with the vehicle is horizontal, and second section is connected to its one end, and the other end is unsettled, and the distance of unsettled one end on the curb girder to shotgun structure is 15mm, and the other part is the same with embodiment one.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. An automobile anti-collision beam comprises a main beam (21), and is characterized in that two mirror symmetry side beams (23) are arranged at the left end and the right end of the main beam (21), the structure of each side beam (23) is a hook, one end of the hook is connected with the main beam (21), and the other end of the hook is suspended and points to a shotgun structure (4); the hook type side beam (23) is of a three-section two-fold structure, the first section is an extension section of the end part of the main beam (21) from one end connected with the main beam (21), the length is 115-135 mm, the second section forms an angle of 45 degrees with the transverse direction of the vehicle, the length is 110-135 mm, the third section forms an angle of 120-125 degrees with the transverse direction of the vehicle, one end of the third section is connected with the second section, and the other end of the third section is suspended; the distance from one suspended end of the side beam to the shotgun structure (4) is 15-30 mm.

2. The automobile bumper beam according to claim 1, wherein the side member (23) is a three-layered structure including a side front member mechanism (231), a reinforcement member mechanism (232), and a side rear member mechanism (233), wherein the cross-sectional shapes of the side front member (231) and the side rear member (233) areIs (1)>The openings are opposite and connected in an overlapping manner, and the edges wrap the whole stiffening beam mechanism (232), and the cross section of the stiffening beam mechanism (232) is transverseThe top of the Chinese character 'ji' is pointed to the side front beam mechanism (231).

3. The automobile anti-collision beam according to claim 2, wherein the side front beam mechanism (231) and the side rear beam mechanism (233) are made of alloy steel with the model number of 590DP and the thickness of 2 mm.

4. The automotive bumper beam of claim 2, wherein the reinforcement beam mechanism (232) is formed from a gauge 780DP, 2.5mm thick alloy steel.

5. The automobile bumper beam according to claim 2, wherein the side member (23) is welded to each other by a side front member mechanism (231), a reinforcing member mechanism (232), and a side rear member mechanism (233).

6. An automotive bumper beam according to claim 1, characterized in that the main beam (21) and the two side beams (23) are connected by welding.

7. An automotive bumper beam according to claim 1, characterized in that the cross section of the side beams (23) is matched to the width and height dimensions of the cross section of the main beams (21).

8. The automobile anti-collision beam according to claim 1, wherein the main beam (21) is arc-shaped, and the radius of the arc is greater than or equal to 2.3m.