CN110979227A - Front end structure of automobile longitudinal beam - Google Patents
Front end structure of automobile longitudinal beam Download PDFInfo
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- CN110979227A CN110979227A CN201911362971.XA CN201911362971A CN110979227A CN 110979227 A CN110979227 A CN 110979227A CN 201911362971 A CN201911362971 A CN 201911362971A CN 110979227 A CN110979227 A CN 110979227A
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- energy absorption
- absorption box
- plate
- longitudinal beam
- energy
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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
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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
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
Abstract
The invention relates to an automobile longitudinal beam front end structure, which comprises a longitudinal beam assembly and a front collision beam assembly, and is characterized in that: the front collision beam assembly comprises a front collision beam, an energy absorption box and an energy absorption box mounting plate; the front collision beam is of a cavity structure, and an upper beam reinforcing plate and a lower beam reinforcing plate which are connected with the front and the back of the front collision beam are arranged in the front collision beam; the energy absorption box is internally provided with an energy absorption box upper reinforcing plate and an energy absorption box lower reinforcing plate which are connected with the left side surface and the right side surface of the energy absorption box, the front end parts of the energy absorption box upper reinforcing plate and the energy absorption box lower reinforcing plate are clung to the back of the front collision beam, and the rear end parts of the energy absorption box upper reinforcing plate and the energy absorption box lower reinforcing plate are clung to the energy absorption box mounting plate; the longitudinal beam assembly comprises a longitudinal beam inner plate and a longitudinal beam outer plate which is connected with the longitudinal beam inner plate in a matched mode, an upper support is connected to the upper face of the front end portion of the longitudinal beam inner plate, a lower support is connected to the lower face of the front end portion of the longitudinal beam inner plate, the upper portion of the energy absorption box mounting plate is connected with the upper support in a matched mode, and the lower portion of the energy absorption. The energy-absorbing structure has a good collision energy-absorbing effect, and has high collision resistance and high maintenance economy.
Description
Technical Field
The invention relates to an automobile body, in particular to an RCAR type longitudinal beam front end structure.
Background
In 2017, a safety index (hereinafter referred to as "C-IASI") test and evaluation system of the insurance automobiles in China is established, and marks that the safety standard of the automobile industry in China is in formal rail contact with developed countries of foreign automobiles, so that the safety index becomes a historical turning point of the development of passive safety technologies in China. The C-IASI comprises an in-vehicle passenger safety index which is usually concerned by consumers, and is added with an evaluation of crashworthiness and maintenance economy index, which is hereinafter referred to as RCAR.
According to the RCAR evaluation regulation, after a collision test is carried out at the speed of 15km/h, firstly, the displacement of parts such as a longitudinal beam, a chassis and the like of a test vehicle needs to be accurately measured to see whether the displacement exceeds 3mm or not, and the displacement is used as the evaluation basis of the 'crashworthiness' of a vehicle; and secondly, checking whether parts such as the longitudinal beam and the like are permanently deformed or not as evaluation basis of maintenance economy. The traditional longitudinal beam front end structure is designed from the angle of energy absorption, and has the following defects: firstly, in order to improve the energy absorption capacity, the energy absorption box is designed to be overlong, so that not only is the collision instability easy to occur, but also the cost and the weight are increased; and secondly, designing a large section size or a high-strength energy absorption box to meet the energy absorption requirement, but in order to ensure the rationality of rigidity gradient, the longitudinal beam needs to be reinforced and thickened in the same way, so that the cost is greatly increased. Further, at present, it is urgently needed to develop a front end structure of a longitudinal beam of an automobile, so that the longitudinal beam still has impact resistance under the condition that collision energy cannot be fully absorbed, and the 'RCAR' of the automobile is improved.
The following patents provide many inventive improvements and optimizations to a crash beam assembly with varying degrees of improved energy absorption, but none are considered from the standpoint of crash resistance and maintenance economics. For example, the structure of the collision beam is optimized properly as in the 'an aluminum alloy front collision beam assembly' disclosed in CN204055667U, the energy absorption effect is improved, but the energy absorption of the assembly is not improved in a breakthrough manner; in the automobile front collision beam assembly disclosed in CN202138419U, the energy absorption effect is obviously improved by adding the auxiliary energy absorption box, but the auxiliary energy absorption box occupies leg collision space for pedestrian protection, and has high weight and cost, so that mass industrial application is not easy to develop; in the aluminum alloy energy absorption box for the automobile disclosed in CN105235617A, composite materials with different densities are filled in the energy absorption box body, so that the energy absorption effect is greatly improved, but the filling of the composite materials can increase the rigidity of the energy absorption box, thereby negatively affecting the maintenance economy of the longitudinal beam, and being only suitable for high-speed collision working conditions.
Disclosure of Invention
The invention aims to provide an automobile longitudinal beam front end structure which has a high collision energy absorption effect, high collision resistance and high maintenance economy, namely, the maintenance economy is guaranteed, and meanwhile, the collision safety is also considered.
The invention relates to an automobile longitudinal beam front end structure, which comprises a longitudinal beam assembly and a front collision cross beam assembly connected with the front end part of the longitudinal beam assembly, and is characterized in that: the front collision beam assembly comprises a front collision beam, an energy absorption box of which the front end part is connected with the front collision beam, and an energy absorption box mounting plate of which the rear end part is connected with the energy absorption box; the front collision beam is of a cavity structure, and an upper beam reinforcing plate and a lower beam reinforcing plate which are connected with the front and the back of the front collision beam are arranged in the front collision beam; an energy-absorbing box upper reinforcing plate and an energy-absorbing box lower reinforcing plate which are connected with the left side surface and the right side surface of the energy-absorbing box are arranged in the energy-absorbing box, the front end parts of the energy-absorbing box upper reinforcing plate and the energy-absorbing box lower reinforcing plate are tightly attached to the back surface of the front collision beam, and the rear end parts of the energy-absorbing box upper reinforcing plate and the energy-absorbing box lower reinforcing plate are tightly attached to the energy-; the longitudinal beam assembly comprises a longitudinal beam inner plate and a longitudinal beam outer plate which is connected with the longitudinal beam inner plate in a matched mode, an upper support is connected to the upper face of the front end portion of the longitudinal beam inner plate, a lower support is connected to the lower face of the front end portion of the longitudinal beam inner plate, the upper portion of the energy absorption box mounting plate is connected with the upper support in a matched mode, and the lower portion of the energy absorption box mounting plate is connected.
Further, the beam upper reinforcing plate is inclined downwards from front to back, and the beam lower reinforcing plate is inclined upwards from front to back.
Furthermore, the outer contour of the cross section of the energy absorption box is a rectangle with four rounded corners, and the radius range of the rounded corners is 15 mm-35 mm.
Furthermore, an energy absorption box induction groove is arranged on the left side face or the right side face of the energy absorption box and is arranged in the vertical direction.
Furthermore, an energy absorption box weakening hole is formed in the upper surface or the lower surface of the energy absorption box.
Further, the length of the energy absorption box is 90mm to 140 mm.
Furthermore, the upper bracket is provided with an upper bracket front mounting part and an upper bracket lower mounting part, the upper bracket front mounting part is connected with the upper part of the energy absorption box mounting plate in a matching way, and the upper bracket lower mounting part is connected with the upper surface of the front end part of the inner plate of the longitudinal beam; the lower bracket is provided with a lower bracket front mounting part and a lower bracket mounting part, the lower bracket front mounting part is connected with the lower part of the energy absorption box mounting plate in a matching way, and the lower bracket mounting part is connected with the lower surface of the front end part of the inner plate of the longitudinal beam.
Furthermore, the upper bracket is also provided with an upper bracket left flanging which is connected with the left side of the upper bracket front mounting part and the left side of the upper bracket lower mounting part, and an upper bracket right flanging which is connected with the right side of the upper bracket front mounting part and the right side of the upper bracket lower mounting part; the lower bracket is also provided with a lower bracket left flanging which is connected with the left side of the lower bracket front mounting part and the left side of the lower bracket mounting part, and a lower bracket right flanging which is connected with the right side of the lower bracket front mounting part and the right side of the lower bracket mounting part.
Furthermore, a longitudinal beam front sealing plate is matched at the front end part of the longitudinal beam assembly, and is provided with a first flanging and a first welding surface which are in lap joint with the longitudinal beam inner plate, and a first front mounting surface which corresponds to the energy absorption box mounting plate, wherein the first front mounting surface is positioned between the upper support and the lower support, and the energy absorption box mounting plate.
Furthermore, a radiator support is matched at the front end part of the longitudinal beam assembly, the radiator support is provided with a second flanging and a second welding surface which are in lap joint with the inner plate of the longitudinal beam, and a second front mounting surface which corresponds to the energy absorption box mounting plate, and the second front mounting surface is overlapped with the first front mounting surface and is positioned between the upper bracket and the lower bracket and between the energy absorption box mounting plate.
Further, the front collision beam assembly is made of an aluminum alloy material.
The invention has the beneficial technical effects that:
because the upper crossbeam reinforcing plate and the lower crossbeam reinforcing plate are arranged in the front collision crossbeam, and the upper energy-absorbing box reinforcing plate and the lower energy-absorbing box reinforcing plate are arranged in the energy-absorbing box, when collision occurs, the front collision crossbeam can better realize crushing deformation, absorb part of collision energy and transmit collision force to the energy-absorbing box, the energy-absorbing box can improve the collision energy absorption, reduce the collision force transmitted to the longitudinal beam assembly, and the safety performance is high; the front collision beam assembly is connected with the longitudinal beam inner plate through the upper support and the lower support on the longitudinal beam inner plate, and the transmission path of the collision force is reasonably designed, so that the collision force can be reasonably distributed on the longitudinal beam inner plate and the longitudinal beam outer plate, the original state that the longitudinal beam inner plate and the longitudinal beam outer plate are equally stressed is changed, the longitudinal beam inner plate and the longitudinal beam outer plate cannot displace or permanently deform in the low-speed collision process, the maintenance cost of an accident vehicle is reduced to the maximum extent, and the longitudinal beam inner plate and the longitudinal beam outer plate can still realize normal crushing deformation in the high-speed collision process, namely, the maintenance economy of the vehicle is guaranteed, and the collision safety is also considered; because the upper cross beam reinforcing plate inclines downwards from front to back and the lower cross beam reinforcing plate inclines upwards from front to back, the effect of concentrating collision force to the middle part of the energy absorption box is achieved, and collision energy absorption is further improved; the energy absorption box is designed to be rectangular with the outer contour of the cross section being four-corner rounded corners, the energy absorption box induction groove is arranged on the left side surface or the right side surface of the energy absorption box, and the energy absorption box weakening hole is arranged on the upper surface or the lower surface of the energy absorption box induction groove, so that the integral rigidity of the energy absorption box is reduced, and the collision safety is improved.
Drawings
FIG. 1 is one of the schematic structural diagrams of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention;
FIG. 3 is one of the structural schematics of a front impact beam assembly;
FIG. 4 is a second schematic structural view of the front impact beam assembly;
FIG. 5 is a schematic structural view of a longeron front closure plate;
FIG. 6 is a schematic view of a heat sink brace;
FIG. 7 is a cross-sectional view of the crash box;
FIG. 8 is a schematic structural view of a crash box mounting plate;
fig. 9 is a structural schematic diagram of the upper bracket.
In the figure: 1-a front collision beam assembly, 2-a longitudinal beam assembly, 3-a longitudinal beam front closing plate and 4-a radiator support;
11-front collision beam, 12-energy absorption box, 13-energy absorption box mounting plate;
111-beam upper stiffening plate, 112-beam lower stiffening plate;
121-an upper reinforcing plate of the energy absorption box, 122-a lower reinforcing plate of the energy absorption box, 123-an energy absorption box induction groove and 124-an energy absorption box weakening hole;
131-mounting holes, 132-positioning holes;
21-longitudinal beam inner plate, 22-longitudinal beam outer plate, 23-upper support and 24-lower support;
231-front mounting part of upper bracket, 232-lower mounting part of upper bracket, 233-left flanging of upper bracket, and 234-right flanging of upper bracket;
31-a first flange, 32-a first welding surface, 33-a first front mounting surface;
41-second flange, 42-second welding surface and 43-second front mounting surface.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1 to 9, an automobile longitudinal beam front end structure includes a longitudinal beam assembly 2, and a front collision cross beam assembly 1 connected to a front end of the longitudinal beam assembly 2, and is characterized in that: the front collision beam assembly 1 comprises a front collision beam 11, an energy absorption box 12 of which the front end part is connected with the front collision beam 11, and an energy absorption box mounting plate 13 connected with the rear end part of the energy absorption box 12; the front collision beam 11 is of a cavity structure, and a beam upper reinforcing plate 111 and a beam lower reinforcing plate 112 which are connected with the front and the back of the front collision beam are arranged in the front collision beam; an energy-absorbing box upper reinforcing plate 121 and an energy-absorbing box lower reinforcing plate 122 which are connected with the left side surface and the right side surface of the energy-absorbing box 12 are arranged in the energy-absorbing box, the front end parts of the energy-absorbing box upper reinforcing plate 121 and the energy-absorbing box lower reinforcing plate 122 are tightly attached to the back surface of the front collision beam 11, and the rear end parts of the energy-absorbing box upper reinforcing plate 121 and the energy-absorbing box lower reinforcing plate 122 are tightly attached to the energy; the longitudinal beam assembly 2 comprises a longitudinal beam inner plate 21 and a longitudinal beam outer plate 22 which is connected with the longitudinal beam inner plate in a matched mode, an upper support 23 is connected to the upper face of the front end portion of the longitudinal beam inner plate 21, a lower support 24 is connected to the lower face of the front end portion of the longitudinal beam inner plate, the upper portion of the energy absorption box mounting plate 13 is connected with the upper support 23 in a matched mode, and the lower portion of the energy absorption box mounting plate 13 is connected. The front collision beam assembly 1 is made of aluminum alloy, the front collision beam 11 is divided into three transverse cavities by the beam upper reinforcing plate 111 and the beam lower reinforcing plate 112, and the energy absorption box 12 is divided into three longitudinal cavities by the energy absorption box upper reinforcing plate 121 and the energy absorption box lower reinforcing plate 122; when collision occurs, the three cavities of the front collision beam 11 can crush and deform to absorb part of collision energy and transmit collision force to the energy absorption box 12, and the three cavities of the energy absorption box 12 can improve the collision energy absorption and reduce the collision force transmitted to the longitudinal beam assembly 2. Because the front collision beam assembly 1 is connected with the upper bracket 23 and the lower bracket 24 on the inner longitudinal beam plate 21 through the energy absorption box mounting plate 13, collision force is transmitted to the energy absorption box mounting plate 13 through the energy absorption box 12, then transmitted to the upper bracket 23 and the lower bracket 24 and finally transmitted to the inner longitudinal beam plate 21; in the low-speed collision process, the longitudinal beam inner plate 21 and the longitudinal beam outer plate 22 cannot be displaced or permanently deformed, so that the maintenance cost of the accident vehicle is reduced to the maximum extent; the side member inner panel 21 and the side member outer panel 22 can still be deformed in normal crushing during a high-speed collision. The maintenance economy is guaranteed, and meanwhile, the collision safety is also considered.
The upper cross member reinforcing plate 111 is inclined downward from front to rear, and the lower cross member reinforcing plate 112 is inclined upward from front to rear. The three cavities of the front collision beam 11 are an upper cavity, a middle cavity and a lower cavity in sequence, and the front height of the middle cavity is greater than the rear height of the middle cavity; the impact force can be transmitted to the middle part of the energy absorption box 12, and the impact energy absorption is further improved.
The outer contour of the cross section of the energy absorption box 12 is a rectangle with four rounded corners, and the radius range of the rounded corners is 15mm (millimeters) to 35mm (millimeters). The four rounded corners of the crash box 12 can reduce the overall stiffness of the crash box.
An energy absorption box induction groove 123 is formed in the left side face or the right side face of the energy absorption box 12, and the energy absorption box induction groove 123 is arranged in the vertical direction; the crash box 12 is provided with crash box weakening holes 124 above or below it. The crash box induction slots 123 and crash box weakening holes 124 can reduce the stiffness of the crash box 12.
The length of the crash box 12 is 90mm (millimeters) to 140mm (millimeters). When the crash box 12 transmits the crash force, the upper and lower surfaces of the crash box 12, the upper crash box reinforcing plate 121, and the lower crash box reinforcing plate 122 form a primary force transmission path, and the left and right side surfaces of the crash box 12 form a secondary force transmission path.
The upper bracket 23 is provided with an upper bracket front mounting part 231 and an upper bracket lower mounting part 232, the upper bracket front mounting part 231 is connected with the upper part of the energy absorption box mounting plate 13 in a matching way, and the upper bracket lower mounting part 232 is connected with the upper surface of the front end part of the longitudinal beam inner plate 21; the lower bracket 24 is provided with a lower bracket front mounting part and a lower bracket mounting part, the lower bracket front mounting part is connected with the lower part of the energy absorption box mounting plate 13 in a matching way, and the lower bracket mounting part is connected with the lower surface of the front end part of the longitudinal beam inner plate 21. The upper bracket 23 and the lower bracket 24 have the same structure, are both in a widened L-shaped design, are main force transmission parts and can transmit most of collision force to the longitudinal beam inner plate 21. The upper bracket 23 and the lower bracket 24 are both formed by stamping high-strength steel plates, and the thickness is between 2.0mm (millimeter) and 3.0mm (millimeter); the upper part and the lower part of the energy-absorbing box mounting plate 13 are respectively provided with a mounting hole 131, the middle part of the energy-absorbing box mounting plate is provided with a positioning hole, the upper bracket front mounting part 231 is provided with a through hole corresponding to the mounting hole 131 at the upper part of the energy-absorbing box mounting plate 13, and the lower bracket front mounting part is provided with a through hole corresponding to the mounting hole 131 at the lower part of the energy-absorbing box mounting; the upper bracket front mounting part 231, the lower bracket front mounting part and the energy absorption box mounting plate 13 on the front collision beam assembly 1 are assembled and connected together through bolts, and the upper bracket lower mounting part 232, the lower bracket mounting part and the longitudinal beam inner plate 21 are in lap joint.
The upper bracket 23 is further provided with an upper bracket left flange 233 connecting the left side of the upper bracket front mounting part 231 and the left side of the upper bracket lower mounting part 232, and an upper bracket right flange 234 connecting the right side of the upper bracket front mounting part 231 and the right side of the upper bracket lower mounting part 232; the lower bracket 24 further has a lower bracket left flange connecting the left side of the lower bracket front mounting part and the left side of the lower bracket mounting part, and a lower bracket right flange connecting the right side of the lower bracket front mounting part and the right side of the lower bracket mounting part. The upper bracket left flange 233, the upper bracket right flange 234, and the lower bracket left flange and the lower bracket right flange are in lap joint with the longitudinal beam inner plate 21.
The front end part of the longitudinal beam assembly 2 is matched with a longitudinal beam front sealing plate 3, the longitudinal beam front sealing plate 3 is provided with a first flanging 31 and a first welding surface 32 which are lapped with the longitudinal beam inner plate 21, and a first front mounting surface 33 corresponding to the energy absorption box mounting plate 13, and the first front mounting surface 33 is positioned between the upper bracket 23 and the lower bracket 24 and the energy absorption box mounting plate 13.
The front end part of the longitudinal beam assembly 2 is matched with a radiator support 4, the radiator support 4 is provided with a second flanging 41 and a second welding surface 42 which are lapped with the longitudinal beam inner plate 21, and a second front mounting surface 43 which corresponds to the energy absorption box mounting plate 13, and the second front mounting surface 43 is overlapped with the first front mounting surface 33 and is positioned between the upper bracket 23 and the lower bracket 24 and the energy absorption box mounting plate 13. Namely, the upper bracket front mounting part 231 of the upper bracket 23, the first front mounting surface 33 of the side member front sealing plate 3, the second front mounting surface 43 of the radiator support 4 and the upper part of the energy-absorbing box mounting plate 13 are connected together through bolts; the lower bracket front mounting surface of the lower bracket 24, the first front mounting surface 33 of the side member front closure plate 3, the second front mounting surface 43 of the radiator support 4, and the lower portion of the crash box mounting plate 13 are bolted together. The radiator support posts 4 are all designed to be U-shaped in cross section, and the radiator support posts 4 are matched with the longitudinal beam front sealing plate 3 to form a secondary force transmission path so as to transmit a small amount of collision force to the longitudinal beam outer plate 22.
The front collision beam 11 is of a crushable design made of a low-rigidity and high-strength material grade, and the yield strength is not lower than 310 MPa; the energy absorption box mounting plate 13 is made of high-strength material, and the yield strength is not lower than 310 MPa; to provide sufficient bending and support strength. The energy absorption box 12 is made of 6063 series aluminum alloy material, and the yield strength is not lower than 260 MPa. The longitudinal beam front closing plate 3 and the radiator support 4 are both formed by stamping common steel plates, and are thinner and between 0.8mm (millimeter) and 1.2mm (millimeter).
Because the rigidity of the inner side beam plate 21 of the automobile is higher than that of the outer side beam plate 22 of the automobile, when the automobile collides, the front collision cross beam 11 absorbs part of collision energy and then transmits collision force to the energy absorption box 12; then, most of the collision force is transmitted to the side member inner panel 21 through the upper bracket 23 and the lower bracket 24, and a small portion of the collision force is transmitted to the side member outer panel 22 through the side member front shroud 3 and the radiator support pillar 4. According to the invention, through reasonably designing the transmission path of the collision force, the collision force can be reasonably distributed on the longitudinal beam inner plate 21 and the longitudinal beam outer plate 22, and the original state that the longitudinal beam inner plate 21 and the longitudinal beam outer plate 22 are equally stressed is changed; after the vehicle is collided at low speed, the longitudinal beam assembly 2 can not be displaced or permanently deformed, and the maintenance cost of the accident vehicle is reduced to the maximum extent; after a high-speed collision, the longitudinal beam assembly 2 can realize normal crushing deformation.
The stress state of the inner plate and the outer plate of the longitudinal beam can be reasonably distributed, the energy absorption effect can be improved, and the vehicle has higher collision resistance and maintenance economy, so that the maintenance economy is guaranteed, and the collision safety is also considered; meanwhile, the structure is simple, the weight is light, the application range is wide, and the manufacturing cost is low.
Claims (10)
1. The utility model provides an automobile longitudinal beam front end structure, includes longeron assembly (2), with the front impact beam assembly (1) that the front end of longeron assembly (2) links to each other, characterized by: the front collision beam assembly (1) comprises a front collision beam (11), an energy absorption box (12) with the front end part connected with the front collision beam (11), and an energy absorption box mounting plate (13) connected with the rear end part of the energy absorption box (12); the front collision beam (11) is of a cavity structure, and an upper beam reinforcing plate (111) and a lower beam reinforcing plate (112) which are connected with the front and the back of the front collision beam are arranged in the front collision beam; an energy-absorbing box upper reinforcing plate (121) and an energy-absorbing box lower reinforcing plate (122) which are connected with the left side surface and the right side surface of the energy-absorbing box (12) are arranged in the energy-absorbing box, the front end parts of the energy-absorbing box upper reinforcing plate (121) and the energy-absorbing box lower reinforcing plate (122) are tightly attached to the back surface of the front collision beam (11), and the rear end parts of the energy-absorbing box upper reinforcing plate and the energy-absorbing box lower reinforcing plate are tightly attached to the energy-absorbing box mounting; the longitudinal beam assembly (2) comprises a longitudinal beam inner plate (21) and a longitudinal beam outer plate (22) which is connected with the longitudinal beam inner plate in a matched mode, an upper support (23) is connected to the upper face of the front end portion of the longitudinal beam inner plate (21), a lower support (24) is connected to the lower face of the front end portion of the longitudinal beam inner plate, the upper portion of the energy absorption box mounting plate (13) is connected with the upper support (23) in a matched mode, and the lower portion of the energy absorption box mounting plate is connected with.
2. The front end structure of a vehicle side member according to claim 1, wherein: the beam upper reinforcing plate (111) inclines downwards from front to back, and the beam lower reinforcing plate (112) inclines upwards from front to back.
3. The front end structure of a vehicle side member according to claim 1 or 2, wherein: the outer contour of the cross section of the energy absorption box (12) is a rectangle with four rounded corners, and the radius range of the rounded corners is 15mm to 35 mm.
4. The front end structure of a vehicle side member according to claim 3, wherein: the energy absorption box is characterized in that an energy absorption box inducing groove (123) is formed in the left side face or the right side face of the energy absorption box (12), and the energy absorption box inducing groove (123) is arranged in the vertical direction.
5. The front end structure of a vehicle side member according to claim 4, wherein: the energy absorption box is characterized in that an energy absorption box weakening hole (124) is formed in the upper surface or the lower surface of the energy absorption box (12).
6. The front end structure of a vehicle side member according to claim 5, wherein: the length of the energy absorption box (12) is 90mm to 140 mm.
7. The front end structure of a vehicle side member according to claim 3, wherein: the upper bracket (23) is provided with an upper bracket front mounting part (231) and an upper bracket lower mounting part (232), the upper bracket front mounting part (231) is connected with the upper part of the energy absorption box mounting plate (13) in a matching way, and the upper bracket lower mounting part (232) is connected with the upper surface of the front end part of the longitudinal beam inner plate (21); the lower support (24) is provided with a lower support front mounting part and a lower support mounting part, the lower support front mounting part is connected with the lower part of the energy absorption box mounting plate (13) in a matched mode, and the lower support mounting part is connected with the lower surface of the front end part of the longitudinal beam inner plate (21).
8. The front end structure of a vehicle side member according to claim 7, wherein: the upper bracket (23) is also provided with an upper bracket left flanging (233) for connecting the left side of the upper bracket front mounting part (231) and the left side of the upper bracket lower mounting part (232), and an upper bracket right flanging (234) for connecting the right side of the upper bracket front mounting part (231) and the right side of the upper bracket lower mounting part (232); the lower support (24) is also provided with a lower support left flanging which is connected with the left side of the lower support front mounting part and the left side of the lower support mounting part, and a lower support right flanging which is connected with the right side of the lower support front mounting part and the right side of the lower support mounting part.
9. The front end structure of a vehicle side member according to claim 7 or 8, wherein: the front end part of the longitudinal beam assembly (2) is matched with a longitudinal beam front sealing plate (3), the longitudinal beam front sealing plate (3) is provided with a first flanging (31) and a first welding surface (32) which are overlapped with the longitudinal beam inner plate (21), and a first front mounting surface (33) corresponding to the energy absorption box mounting plate (13), and the first front mounting surface (33) is positioned between the upper bracket (23) and the energy absorption box mounting plate (13) and between the lower bracket (24) and the energy absorption box mounting plate (13).
10. The front end structure of a vehicle side member according to claim 9, wherein: the front end part of the longitudinal beam assembly (2) is matched with a radiator support column (4), the radiator support column (4) is provided with a second flanging (41) and a second welding surface (42) which are overlapped with the longitudinal beam inner plate (21), and a second front mounting surface (43) corresponding to the energy absorption box mounting plate (13), and the second front mounting surface (43) is overlapped with the first front mounting surface (33) and is positioned between the upper bracket (23) and the energy absorption box mounting plate (13) and between the lower bracket (24) and the energy absorption box mounting plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911362971.XA CN110979227B (en) | 2019-12-26 | 2019-12-26 | Front end structure of automobile longitudinal beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911362971.XA CN110979227B (en) | 2019-12-26 | 2019-12-26 | Front end structure of automobile longitudinal beam |
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| Publication Number | Publication Date |
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| CN110979227A true CN110979227A (en) | 2020-04-10 |
| CN110979227B CN110979227B (en) | 2023-03-28 |
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| CN201911362971.XA Active CN110979227B (en) | 2019-12-26 | 2019-12-26 | Front end structure of automobile longitudinal beam |
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| CN110979227B (en) | 2023-03-28 |
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