Vehicle body front end assembly and vehicle

Abstract

The vehicle body front end assembly comprises an anti-collision beam, an upper longitudinal beam, a lower longitudinal beam and a bridging part, the anti-collision beam and the lower longitudinal beam are both connected with the bridging part, the bridging part is further connected with a bridging beam, the end, away from the bridging part, of the bridging beam is connected with the upper longitudinal beam, and the end, away from the bridging part, of the bridging beam is connected with the lower longitudinal beam. And the bridging part is of a multi-cavity structure. According to the vehicle body front-end assembly, the rigidity of the vehicle body front-end assembly is improved through dispersed transmission of impact loads and two dimensions of the multi-cavity structure, the probability of crumple of the vehicle head front-end structure is further reduced, and the safety performance of people in a vehicle is improved when the vehicle is in head-on collision.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle body front end assembly and a vehicle. Background Art

[0002] With the development of the automotive industry and rising consumer spending, consumers have placed higher demands on vehicle durability, reliability, driving comfort, and handling stability. Existing front-end vehicle bodies have low rigidity. In a head-on collision, the upper and lower longitudinal beams of the front-end vehicle body assembly are prone to collapse, increasing intrusion into the front passenger compartment and compromising the vehicle's frontal collision safety performance. Utility Model Content

[0003] In order to solve the above technical problems, the present invention provides a front end assembly of the vehicle body, which can improve the rigidity of the front end assembly of the vehicle body, reduce the possibility of collapse of the front end structure of the vehicle, and improve the safety performance of the occupants in the vehicle during a head-on collision.

[0004] On the one hand, the utility model provides a vehicle body front end assembly, including an anti-collision beam, an upper longitudinal beam, a lower longitudinal beam and a bridging portion, wherein the anti-collision beam and the lower longitudinal beam are both connected to the bridging portion, and a bridging beam is also connected to the bridging portion, and one end of the bridging beam away from the bridging portion is connected to the upper longitudinal beam, and the bridging portion is a multi-cavity structure.

[0005] In one embodiment of the present invention, the bridging portion includes an energy absorbing mechanism, one end of the energy absorbing mechanism is connected to the anti-collision beam, and the other end of the energy absorbing mechanism is connected to the lower longitudinal beam.

[0006] In one embodiment of the present invention, the bridging portion further includes an energy absorbing mounting plate and a mounting bracket, the energy absorbing mounting plate is arranged between the energy absorbing mechanism and the lower longitudinal beam, and the mounting bracket is arranged between the energy absorbing mounting plate and the lower longitudinal beam.

[0007] In one embodiment of the present invention, a reinforcement cavity is formed between the mounting bracket, the energy absorbing mounting plate and the lower longitudinal beam, and an auxiliary bracket is provided in the reinforcement cavity, which divides the reinforcement cavity into several sub-cavities.

[0008] In one embodiment of the present invention, a bridging ring is provided in the reinforcement cavity, and the energy absorbing mounting plate, the mounting bracket, the auxiliary bracket and the lower longitudinal beam are all connected to the bridging ring.

[0009] In one embodiment of the present invention, the bridging portion further includes a reinforcing bracket, one end of the reinforcing bracket is connected to the mounting bracket, and the other end of the reinforcing bracket is connected to the bridging beam.

[0010] In one embodiment of the present invention, a protective cover is provided between the bridging beam and the lower longitudinal beam, and a closed ring structure is formed between the lower longitudinal beam, the protective cover, the bridging beam and the mounting bracket.

[0011] In one embodiment of the present invention, a shock-absorbing tower is connected between the upper longitudinal beam and the lower longitudinal beam, a first reinforcement portion is provided on the inner cavity wall of the shock-absorbing tower, and a second reinforcement portion is provided between the first reinforcement portion and the lower longitudinal beam.

[0012] In one embodiment of the present invention, the cross section of the bridging portion along the horizontal section and the cross section along the vertical section are both multi-cavity structures.

[0013] On the other hand, a vehicle is provided, comprising the above-mentioned front end vehicle assembly.

[0014] The above technical solution of the utility model has the following advantages compared with the prior art:

[0015] The impact load on the anti-collision beam described in the present invention is transferred through a bridge portion through a transmission path through the bridge beam. The bridge beam can help share the impact load transferred to the lower longitudinal beam, thereby increasing the rigidity of the front end assembly of the vehicle body, effectively reducing the possibility of the front end structure collapsing, and improving the safety performance of the vehicle during a frontal collision. In addition, the bridge portion is a multi-cavity structure, which can effectively increase the rigidity of the front end assembly of the vehicle body. Therefore, the front end assembly of the vehicle body of the present application increases the rigidity of the front end assembly of the vehicle body through two dimensions: the dispersed transmission of impact loads and the multi-cavity structure, further reducing the possibility of the front end structure collapsing, and improving the safety performance of the vehicle occupants during a frontal collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a first structural schematic diagram of the vehicle body front end assembly of the present utility model;

[0018] Figure 2 This is a second structural schematic diagram of the vehicle body front end assembly of the present utility model;

[0019] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0020] Figure 4This is an exploded view of the lower longitudinal beam, reinforcement bracket and mounting bracket of the front end assembly of the vehicle body of the present invention;

[0021] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0022] Figure 6 This is a front view of the vehicle body front end assembly of the present utility model;

[0023] Figure 7 yes Figure 6 Cross-section at AA;

[0024] Figure 8 yes Figure 6 Cross-section at the middle BB;

[0025] Figure 9 This is a first structural schematic diagram of the mounting bracket of the vehicle body front end assembly of the present utility model;

[0026] Figure 10 This is a second structural schematic diagram of the mounting bracket of the vehicle body front end assembly of the present invention;

[0027] Figure 11 This is a structural diagram of the bridging ring of the vehicle body front end assembly of the present invention;

[0028] Figure 12 This is a front view of the bridging ring of the vehicle body front end assembly of the present invention;

[0029] Figure 13 This is a first structural schematic diagram of the reinforcement bracket of the vehicle body front end assembly of the present invention;

[0030] Figure 14 This is a second structural schematic diagram of the reinforcement bracket of the vehicle body front end assembly of the present invention;

[0031] Figure 15 This is a front view of the reinforcement bracket of the vehicle body front end assembly of the present invention;

[0032] Figure 16 yes Figure 15 Cross-section at the middle CC;

[0033] Figure 17 This is a schematic diagram of the connection structure of the first bracket and the second bracket of the vehicle body front end assembly of the present invention;

[0034] Figure 18 This is a first structural schematic diagram of the third bracket of the vehicle body front end assembly of the present utility model;

[0035] Figure 19 This is a second structural schematic diagram of the third bracket of the vehicle body front end assembly of the present utility model;

[0036] Figure 20 This is a first structural schematic diagram of the bridging beam of the vehicle body front end assembly of the present utility model;

[0037] Figure 21 This is a second structural schematic diagram of the bridging beam of the vehicle body front end assembly of the present invention;

[0038] Figure 22 This is a front view of the bridging beam of the vehicle body front end assembly of the present invention;

[0039] Figure 23 yes Figure 22 Cross-section at the middle DD;

[0040] Figure 24 yes Figure 22 Cross-section at EE;

[0041] Figure 25 It is a structural schematic diagram of the lower longitudinal beam of the front end assembly of the vehicle body of the present invention;

[0042] Figure 26 This is a third structural schematic diagram of the vehicle body front end assembly of the present utility model;

[0043] Figure 27 This is a fourth structural schematic diagram of the vehicle body front end assembly of the present utility model;

[0044] Figure 28 This is a fifth structural diagram of the vehicle body front end assembly of the present utility model;

[0045] Figure 29 This is a sixth structural diagram of the vehicle body front end assembly of the present utility model;

[0046] Figure 30 It is a structural schematic diagram of the first reinforcement part and the second reinforcement part of the vehicle body front end assembly of the present utility model.

[0047] Description of the accompanying drawings:

[0048] 1. Anti-collision beam; 2. Upper longitudinal beam; 3. Lower longitudinal beam; 4. Bridging part; 5. Bridging beam; 6. Energy absorption mechanism; 7. Energy absorption mounting plate; 8. Mounting bracket; 9. Reinforcement cavity; 10. Auxiliary bracket; 11. Bridging ring; 12. Reinforcement bracket; 13. Protective cover; 14. Shock tower; 15. First reinforcement part; 16. Second reinforcement part; 17. Energy absorption box end plate; 18. Lower longitudinal beam inner plate; 19. Lower longitudinal beam outer plate; 20. Subframe mounting point; 21. Mounting body; 22. Upper support leg; 23. Lower support leg; 24. 1st welding edge of mounting body; 25. 2nd welding edge of mounting body; 26. 1st welding edge of upper support leg; 27. 2nd welding edge of upper support leg; 28. 1st welding edge of lower support leg; 29. ​​2nd welding edge of lower support leg; 30. 3rd welding edge of lower support leg; 31. 1st bracket; 32. 2nd bracket; 33. 3rd bracket; 34. 1st welding plate; 35. 2nd welding plate; 36. 3rd welding plate; 37. 1st welding edge of 1st bracket; 38. 2nd welding edge of 1st bracket; 39. Bottom platform; 40. 2nd bracket 41. Second bracket second welding edge; 42. Second bracket third welding edge; 43. Bracket body; 44. Bracket support leg; 45. First bolt hole; 46. Bracket support leg first welding edge; 47. Bracket support leg second welding edge; 48. Bracket support leg third welding edge; 49. Bracket body first welding edge; 50. Bracket body second welding edge; 51. Bracket body third welding edge; 52. Reinforcement rib; 53. Reinforced mounting plate; 54. First reinforcing support leg; 55. Second reinforcing support leg; 56. 6. Third reinforced support leg; 57. Mounting surface; 58. First reinforced welding edge; 59. Second reinforced welding edge; 60. Third reinforced welding edge; 61. Fourth reinforced welding edge; 62. Fifth reinforced welding edge; 63. First cavity; 64. Second cavity; 65. Third cavity; 66. Fourth cavity; 67. Fifth cavity; 68. Sixth cavity; 69. Seventh cavity; 70. Eighth cavity; 71. Upper longitudinal beam inner plate; 72. Upper longitudinal beam outer plate; 73. Second bolt hole; 74. Third bolt hole; 75. Avoidance hole. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0050] Example 1

[0051] Reference Figure 1As shown, the front end assembly of the vehicle body of the present invention includes an anti-collision beam 1, an upper longitudinal beam 2, a lower longitudinal beam 3 and a bridging portion 4. The anti-collision beam 1 and the lower longitudinal beam 3 are both connected to the bridging portion 4. A bridging beam 5 is also connected to the bridging portion 4. The end of the bridging beam 5 away from the bridging portion 4 is connected to the upper longitudinal beam 2. The bridging portion 4 is a multi-cavity structure.

[0052] This application improves the rigidity of the front end assembly of the vehicle body by using the bridging beam 5 and the bridging portion 4, so as to further improve the safety performance of the vehicle in the event of a frontal collision. Figure 1 As shown, the front end assembly of the vehicle body of the present application includes an anti-collision beam 1 (front anti-collision beam), an upper longitudinal beam 2, a lower longitudinal beam 3 and a bridging portion 4. The anti-collision beam 1 is located in front of the lower longitudinal beam 3, the upper longitudinal beam 2 is located above the lower longitudinal beam 3, and the bridging portion 4 is located between the end of the anti-collision beam 1 and the end of the lower longitudinal beam 3, wherein the anti-collision beam 1 and the lower longitudinal beam 3 are connected by the bridging portion 4, that is, the anti-collision beam 1 and the lower longitudinal beam 3 are both connected to the bridging portion 4, in addition, the bridging portion 4 is connected to the upper longitudinal beam 2 by a bridging beam 5. Therefore, when the vehicle has a head-on collision, on the one hand, the anti-collision beam 1 The impact load is transferred to the lower longitudinal beam 3, forming a load transfer path. On the other hand, the impact load on the anti-collision beam 1 is transferred to the bridging beam 5 through the bridging portion 4, and then transferred to the upper longitudinal beam 2, forming a load transfer path. Therefore, the impact load on the anti-collision beam 1 adds a transfer path through the bridging beam 5 through the bridging portion 4. The bridging beam 5 can help share the impact load transferred to the lower longitudinal beam 3, thereby improving the stiffness of the front end assembly of the vehicle body, effectively reducing the possibility of the front end structure of the vehicle head collapsing, and improving the safety performance of the vehicle during a frontal collision. In addition, the bridging portion 4 is a multi-cavity structure, and the multi-cavity structure can effectively improve the stiffness of the front end assembly of the vehicle body. Therefore, the front end assembly of the vehicle body of the present application improves the stiffness of the front end assembly of the vehicle body through two dimensions: the dispersed transfer of impact loads and the multi-cavity structure, further reducing the possibility of the front end structure of the vehicle head collapsing, and improving the safety performance of the occupants of the vehicle during a frontal collision. Among them, Figure 25 、 Figure 26 、 Figure 27 and Figure 29 As shown, the upper longitudinal beam 2 includes an upper longitudinal beam inner plate 71 and an upper longitudinal beam outer plate 72. The end of the bridge beam 5 away from the bridge portion 4 is connected between the upper longitudinal beam inner plate 71 and the upper longitudinal beam outer plate 72. When a head-on collision occurs, the impact load on the anti-collision beam 1 can be transmitted to the upper longitudinal beam 2 through the energy-absorbing mounting plate 7, the reinforcement bracket 12, and the bridge beam 5. The upper longitudinal beam inner plate 71 and the upper longitudinal beam outer plate 72 jointly bear the impact load, reducing the collapse deformation of the upper longitudinal beam 2, thereby improving vehicle safety. In addition, the bridge beam 5 is as shown in FIG. Figure 20 、 Figure 21 and Figure 22As shown, the bridging beam 5 is formed in one piece, which has a simple process and eliminates the need for multiple parts splicing processes. The simple structure can save production costs. The bridging beam 5 is composed of a tube wall, and a second bolt hole 73 is provided on the tube wall. The second bolt hole 73 is used to be bolted to the reinforcing bracket 12; a third bolt hole 74 is provided at the rear of the bridging beam 5. The third bolt hole 74 is used to be bolted to the upper longitudinal beam inner plate 71, and an avoidance hole 75 is provided on the bridging beam 5. The avoidance hole 75 corresponds to the third bolt hole 74, which is convenient for the installation tool to pass through when tightening the third bolt, so as to improve the convenience of operation; the unopened position on the tube wall can be welded to the upper longitudinal beam inner plate 71 and the upper longitudinal beam outer plate 72. The cross section of the bridging beam 5 is as shown in FIG. Figure 23 and Figure 24 As shown, it is a closed ring polygonal structure. The cross section of the bridging beam 5 can also be a closed ring such as a circle.

[0053] In one embodiment, the bridging portion 4 includes an energy absorbing mechanism 6 , one end of the energy absorbing mechanism 6 is connected to the anti-collision beam 1 , and the other end of the energy absorbing mechanism 6 is connected to the lower longitudinal beam 3 .

[0054] The bridge portion 4 of the present application includes an energy absorbing mechanism 6, which absorbs part of the impact load of the vehicle during a collision. Figure 2 and Figure 3 As shown, the energy absorption mechanism 6 of the present application is an energy absorption box, one end of the energy absorption box is connected to the anti-collision beam 1, and the other end of the energy absorption box is connected to the lower longitudinal beam 3. When the vehicle collides head-on, part of the impact load on the anti-collision beam 1 is absorbed by the energy absorption box, and part of the remaining impact load is transferred to the lower longitudinal beam 3, and part is transferred to the bridging beam 5 through the bridging portion 4, and then transferred to the upper longitudinal beam 2, so as to improve the stiffness of the front end assembly of the vehicle body through the dispersed transmission of the impact load, further reduce the possibility of collapse of the front end structure of the vehicle, and improve the safety performance of the occupants of the vehicle during a head-on collision.

[0055] In one embodiment, the bridging portion 4 further includes an energy absorbing mounting plate 7 and a mounting bracket 8 . The energy absorbing mounting plate 7 is disposed between the energy absorbing mechanism 6 and the lower longitudinal beam 3 , and the mounting bracket 8 is disposed between the energy absorbing mounting plate 7 and the lower longitudinal beam 3 .

[0056] The bridge portion 4 of the front end assembly of the present application further includes an energy absorbing mounting plate 7 and a mounting bracket 8. The energy absorbing mounting plate 7 is used to connect the energy absorbing mechanism 6 with the lower longitudinal beam 3. The mounting bracket 8 is used to improve the supporting stiffness of the front end assembly of the vehicle body and realize the supporting function of the subframe on the front end assembly of the vehicle body. Specifically, Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the energy absorbing mounting plate 7 is provided between the energy absorbing mechanism 6 and the lower longitudinal beam 3, so as to realize the connection between the energy absorbing mechanism 6 and the lower longitudinal beam 3 through the energy absorbing mounting plate 7, wherein the energy absorbing mounting plate 7 and the energy absorbing box are connected through the energy absorbing box end plate 17. Furthermore, a mounting bracket 8 is provided between the energy absorbing mounting plate 7 and the lower longitudinal beam 3, as shown in FIG. Figure 25 As shown, the lower longitudinal beam 3 includes an inner longitudinal beam plate 18 and an outer longitudinal beam plate 19. The inner plate is located inside the vehicle, and the outer plate is located outside the vehicle. The mounting bracket 8 is connected between the outer longitudinal beam plate 19 of the lower longitudinal beam 3 and the energy absorbing mounting plate 7. The mounting bracket 8 can improve the support stiffness of the front end assembly of the vehicle body. The bottom of the mounting bracket 8 is provided with a subframe mounting point 20, as shown in FIG. Figure 9 As shown, the mounting bracket 8 is connected to the subframe through the subframe mounting point 20. Furthermore, the anti-collision beam 1 is welded to the energy absorption box, and the energy absorption box is welded to the energy absorption box end plate 17. The front anti-collision beam, the energy absorption box and the energy absorption box end plate 17 constitute the front anti-collision beam 1 assembly, and the front anti-collision beam 1 assembly is connected to the energy absorption mounting plate 7 by bolts. Figure 9 and Figure 10 As shown, the mounting bracket 8 includes a mounting body 21, an upper support leg 22 and a lower support leg 23; a first welding edge 24 of the mounting body and a second welding edge 25 of the mounting body are respectively provided on both sides of the mounting body 21, the first welding edge 24 of the mounting body is welded to the lower longitudinal beam outer plate 19, and the second welding edge 25 of the mounting body is welded to the energy absorbing mounting plate 7; a first welding edge 26 of the upper support leg and a second welding edge 27 of the upper support leg are provided on the upper support leg 22, the first welding edge 26 of the upper support leg is connected to the inner wall of the side of the mounting body 21, and the upper support leg is welded to the inner wall of the side of the mounting body 21. The second welding edge 27 of the support leg is welded to the lower longitudinal beam inner plate 18 and the lower longitudinal beam outer plate 19; the lower support leg 23 is provided with a first welding edge 28 of the lower support leg, a second welding edge 29 of the lower support leg and a third welding edge 30 of the lower support leg, the first welding edge 28 of the lower support leg is welded to the energy absorption mounting plate 7, the second welding edge 29 of the lower support leg is welded to the second welding edge 50 of the bracket body on the third bracket 33, and the third welding edge 30 of the lower support leg is connected to the side inner wall of the mounting body 21; the subframe mounting point 20 is set on the lower support leg 23.

[0057] In one embodiment, a reinforcement cavity 9 is formed between the mounting bracket 8 and the energy absorbing mounting plate 7 and the lower longitudinal beam 3 . An auxiliary bracket 10 is provided in the reinforcement cavity 9 . The auxiliary bracket 10 divides the reinforcement cavity 9 into several sub-cavities.

[0058] like Figure 7 and Figure 8 As shown, the interior of the mounting bracket 8 forms a multi-cavity structure to improve the connection stiffness between the mounting bracket 8 and the energy absorbing mounting plate 7 and the lower longitudinal beam 3. Specifically, the energy absorbing mounting plate 7 is arranged between the energy absorbing mechanism 6 and the lower longitudinal beam 3, and the mounting bracket 8 is arranged between the energy absorbing mounting plate 7 and the lower longitudinal beam 3, as shown in FIG. Figure 3 An L-shaped structure is formed between the energy-absorbing mounting plate 7 and the lower longitudinal beam 3, and the mounting bracket 8 is connected at the inner corner of the L-shaped structure, that is, the mounting bracket 8 is connected at the L-shaped right angle between the energy-absorbing mounting plate 7 and the lower longitudinal beam 3. Therefore, a reinforced cavity 9 is formed between the mounting bracket 8 and the energy-absorbing mounting plate 7 and the lower longitudinal beam 3, that is, a reinforced cavity 9 is formed between the mounting bracket 8 and the energy-absorbing mounting plate 7 and the lower longitudinal beam outer plate 19. Furthermore, a number of auxiliary brackets 10 are provided in the reinforcement cavity 9. Preferably, three auxiliary brackets 10 are provided in the reinforcement cavity 9. The auxiliary brackets 10 are plate-shaped. The three auxiliary brackets 10 are preferably arranged vertically in pairs. The three brackets are connected between the energy absorbing mounting plate 7, the lower longitudinal beam outer plate 19 and the mounting bracket 8 to divide the reinforcement cavity 9 into several sub-cavities. Therefore, the multi-cavity structure formed between the energy absorbing mounting plate 7, the lower longitudinal beam outer plate 19 and the mounting bracket 8 effectively improves the connection stiffness between the energy absorbing mounting plate 7, the lower longitudinal beam outer plate 19 and the mounting bracket 8, and further improves the connection stiffness of the front end assembly of the vehicle body; in addition, the stiffness of the subframe mounting point 20 is improved, and the vehicle dynamic driving perception experience is good. At the same time, the reinforcement cavity 9 formed by the mounting bracket 8 reinforces the lower longitudinal beam 3, and the safety performance is excellent. Among them, the three auxiliary brackets 10 are as follows Figure 4 and Figure 5 As shown, the auxiliary bracket 10 includes a first bracket 31, a second bracket 32 ​​and a third bracket 33. The third bracket 33 is connected to the lower longitudinal beam outer plate 19, the bridging ring 11 and the mounting bracket 8. The first bracket 31 and the second bracket 32 ​​are connected to the energy absorbing mounting plate 7, the mounting bracket 8 and the third bracket 33. Figure 17 As shown, the first bracket 31 and the second bracket 32 ​​are connected through three-level welding surfaces to form a stepped shape; the first bracket 31 is provided with a first welding plate 34, a second welding plate 35 and a third welding plate 36, the second welding plate 35 is located between the first welding plate 34 and the third welding plate 36, the first welding plate 34 is parallel to the third welding plate 36, the second welding plate 35 is perpendicular to the first welding plate 34, the first welding plate 34 is connected to the bottom inner wall of the mounting bracket 8, and the first bracket first welding edge 37 and the first bracket second welding edge 38 are provided on both sides of the second welding plate 35. The first bracket first welding edge 37 is connected to the side inner wall of the mounting bracket 8, and the first bracket second welding edge 38 is connected to the bracket body 43 of the third bracket 33, as shown Figure 17 As shown, the first welding surface of the first bracket 31, the second welding plate 35 and the third welding plate 36 form a three-level welding surface. The second bracket 32 ​​includes a bottom platform 39, on which are provided a second bracket first welding edge 40, a second bracket second welding edge 41 and a second bracket third welding edge 42. The second bracket first welding edge 40 is connected to the side inner wall of the mounting bracket 8, the second bracket second welding edge 41 is connected to the energy absorbing mounting plate 7, and the second bracket third welding edge 42 is connected to the bracket body 43 of the third bracket 33. Figure 18 and Figure 19 As shown, the third bracket 33 includes a bracket body 43 and a bracket support leg 44. Two first bolt holes 45 are provided on the bracket body 43. A bolt passes through one of the first bolt holes 45 to connect the bracket body 43 to the lower longitudinal beam inner plate 18, and another bolt passes through the other first bolt hole 45 to connect the bracket body 43 to the lower longitudinal beam outer plate 19; the bracket support leg 44 includes a bracket support leg first welding edge 46, a bracket support leg second welding edge 47 and a bracket support leg third welding edge 48. The bracket support leg first welding edge 46 is connected to the side inner wall of the mounting body 21, the bracket support leg second welding edge 47 is connected to the bridge ring 11 and the side inner wall of the mounting body 21 by three layers of spot welding, and the bracket support leg third welding edge 48 is connected to the energy absorption mounting plate 7. The bracket body 43 is provided with a first welding edge 49 of the bracket body, a second welding edge 50 of the bracket body and a third welding edge 51 of the bracket body. The first welding edge 49 of the bracket body is connected to the lower half of the first welding edge 24 of the mounting body, the upper half of the first welding edge 24 of the mounting body is connected to the lower longitudinal beam outer plate 19, the second welding edge 50 of the bracket body is connected to the second welding edge 29 of the lower support leg of the mounting bracket 8, and the third welding edge 51 of the bracket body is connected to the energy absorption mounting plate 7.

[0059] In one embodiment, a bridging ring 11 is provided in the reinforcement cavity 9 , and the energy absorbing mounting plate 7 , the mounting bracket 8 , the auxiliary bracket 10 and the lower longitudinal beam 3 are all connected to the bridging ring 11 .

[0060] A reinforcement cavity 9 is formed between the mounting bracket 8, the energy absorbing mounting plate 7, and the lower longitudinal beam 3 (lower longitudinal beam outer plate 19). A bridging ring 11 is provided in the reinforcement cavity 9. The energy absorbing mounting plate 7, the mounting bracket 8, the auxiliary bracket 10, and the lower longitudinal beam 3 are connected via the bridging ring 11. Specifically, Figure 11 and Figure 12 As shown, the bridge ring 11 is a plate-shaped profile with welding edges set at both ends of the plate-shaped profile. The two welding edges are welded to form a closed ring-shaped bridge ring 11. Reinforcement ribs 52 are set on the inner wall of the bridge ring 11 to improve the rigidity of the bridge ring 11. Figure 4 and Figure 5 As shown, the front side of the bridging ring 11 is welded to the energy absorbing mounting plate 7, the right side of the bridging ring 11 is welded to the inner plate of the lower cross beam, the left side of the bridging ring 11 is connected to the mounting bracket 8, the upper part of the bridging ring 11 is connected to the inner plate of the lower cross beam and the mounting bracket 8, and the lower side of the bridging ring 11 is spot-welded to the second welding edge of the support leg on the third bracket 33 and the side inner wall of the mounting body 21 in three layers.

[0061] In one embodiment, the bridging portion 4 further includes a reinforcing bracket 12 , one end of the reinforcing bracket 12 is connected to the mounting bracket 8 , and the other end of the reinforcing bracket 12 is connected to the bridging beam 5 .

[0062] The reinforcing bracket 12 is used to realize the connection between the mounting bracket 8 and the bridging beam 5. Specifically, Figure 13 and Figure 14 As shown, the reinforcement bracket 12 includes a reinforcement mounting plate 53, a first reinforcement support leg 54, a second reinforcement support leg 55 and a third reinforcement support leg 56. A mounting surface 57 is provided on the reinforcement mounting plate 53, and the mounting surface 57 is in contact with the side inner wall of the mounting body 21, and then the reinforcement mounting plate 53 is connected to the mounting body 21 by bolts. A first reinforcement welding edge 58 is provided on the first reinforcement support leg 54, a second reinforcement welding edge 59 and a third reinforcement welding edge 60 are provided on the second reinforcement support leg 55, a fourth reinforcement welding edge 61 is provided on the third reinforcement support leg 56, and a fifth reinforcement welding edge 62 is provided on the reinforcement mounting plate 53. The first reinforcement welding edge 58 and the second reinforcement welding edge 59 are welded to the energy absorbing mounting plate 7, and the third reinforcement welding edge 60, the fourth reinforcement welding edge 61 and the fifth reinforcement welding edge 62 are welded to the surface of the mounting body 21. As shown Figure 15 and Figure 16 As shown, the reinforcing mounting plate 53 of the reinforcing bracket 12 forms an "X" shape with the third support leg, the fourth reinforcing welded edge 61, the second support leg, and the third reinforcing welded edge 60. The bridging beam 5 forms a direct force transmission channel between the reinforcing bracket 12 and the upper longitudinal beam 2, which helps improve the stiffness of the subframe mounting point 20 on the mounting bracket 8 in the X, Y, and Z directions.

[0063] In one embodiment, a protective cover 13 is provided between the bridging beam 5 and the lower longitudinal beam 3 , and a closed ring structure is formed between the lower longitudinal beam 3 , the protective cover 13 , the bridging beam 5 and the mounting bracket 8 .

[0064] like Figure 1 and Figure 28 As shown, a protective cover 13 is connected between the bridging beam 5 and the lower side member 3. The protective cover 13 is located behind the mounting bracket 8. A closed loop structure is formed between the lower side member 3, the protective cover 13, the bridging beam 5, and the mounting bracket 8. This helps to improve the front end rigidity of the vehicle and provide excellent frontal collision safety performance. The protective cover 13 is a wheel housing.

[0065] In one embodiment, a shock-absorbing tower 14 is connected between the upper longitudinal beam 2 and the lower longitudinal beam 3 , a first reinforcement portion 15 is provided on the inner wall of the shock-absorbing tower 14 , and a second reinforcement portion 16 is provided between the first reinforcement portion 15 and the lower longitudinal beam 3 .

[0066] like Figure 30As shown, a shock tower 14 is disposed between the upper longitudinal beam 2 and the lower longitudinal beam 3. This tower 14 is used to mount shock-absorbing components such as the suspension. A first reinforcement 15 is disposed within the top inner cavity of the shock tower 14 to enhance the rigidity of the shock tower 14. Furthermore, a second reinforcement 16 is connected between the first reinforcement 15 and the lower longitudinal beam 3 (lower longitudinal beam outer plate 19) to enhance the stability of the connection between the lower longitudinal beam 3 and the shock tower 14. Both the first reinforcement 15 and the second reinforcement 16 are plate materials and are connected to the inner wall of the shock tower 14.

[0067] In one embodiment, the cross section of the bridge portion 4 along the horizontal section and the cross section along the vertical section are both multi-cavity structures.

[0068] like Figure 6 and Figure 7 As shown, the horizontal cross-section of the bridge portion 4 has a four-cavity structure. Specifically, the lower longitudinal sill inner plate 18 and the lower longitudinal sill outer plate 19 form a first cavity 63, the lower longitudinal sill outer plate 19 and the mounting bracket 8 form a second cavity 64, the reinforcing bracket 12, the energy-absorbing mounting plate 7, and the mounting bracket 8 form a third cavity 65, and the bridge beam 5 forms a fourth cavity 66. These four cavities form a four-square grid structure, which facilitates the distributed transfer of force at the subframe mounting point 20 when the mounting bracket 8 is connected to the subframe, thereby increasing the stiffness of the subframe mounting point 20 and thereby enhancing the vehicle's dynamic handling performance.

[0069] like Figure 6 and Figure 8 As shown, the vertical cross-section of the bridging portion 4 along the left-right direction has a four-cavity structure. Specifically, the lower longitudinal sill inner plate 18 and the bridging ring 11 form a fifth cavity 67, the bracket body 43 and bracket support leg 44 of the third bracket 33, the bracket body 43 of the mounting bracket 8, and the second bracket 32 ​​form a sixth cavity 68, the bottom platform 39 of the second bracket 32, the bracket body 43 of the third bracket 33, and the bracket body 43 of the mounting bracket 8 form a seventh cavity 69, and the reinforcing bracket 12 and the mounting bracket 8 form an eighth cavity 70. The four cavities form a four-square grid structure, which facilitates the distributed transmission of the force applied to the subframe mounting point 20 when the mounting bracket 8 is connected to the subframe, thereby improving the stiffness of the subframe mounting point 20 and enhancing the vehicle's dynamic handling performance.

[0070] Example 2

[0071] A vehicle is provided, which includes the above-mentioned front end assembly, the front end assembly including an anti-collision beam 1, an upper longitudinal beam 2, a lower longitudinal beam 3 and a bridging portion 4, the anti-collision beam 1 and the lower longitudinal beam 3 are both connected to the bridging portion 4, the bridging portion 4 is also connected to a bridging beam 5, the end of the bridging beam 5 away from the bridging portion 4 is connected to the upper longitudinal beam 2, and the bridging portion 4 is a multi-cavity structure.

[0072] The front end assembly of the vehicle body of the present application improves the rigidity of the front end assembly through two dimensions: dispersed transmission of impact loads and multi-cavity structure, further reduces the possibility of collapse of the front end structure of the vehicle, and improves the safety performance of the occupants in the vehicle during a head-on collision.

[0073] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. A front end assembly of a vehicle body, characterized by: The invention comprises an anti-collision beam (1), an upper longitudinal beam (2), a lower longitudinal beam (3) and a bridging portion (4); the anti-collision beam (1) and the lower longitudinal beam (3) are both connected to the bridging portion (4); a bridging beam (5) is further connected to the bridging portion (4); an end of the bridging beam (5) away from the bridging portion (4) is connected to the upper longitudinal beam (2); and the bridging portion (4) is a multi-cavity structure.

2. The front end assembly of the vehicle body according to claim 1, characterized in that: The bridging portion (4) includes an energy absorbing mechanism (6), one end of the energy absorbing mechanism (6) is connected to the anti-collision beam (1), and the other end of the energy absorbing mechanism (6) is connected to the lower longitudinal beam (3).

3. The front end assembly of the vehicle body according to claim 2, characterized in that: The bridging portion (4) further comprises an energy absorbing mounting plate (7) and a mounting bracket (8); the energy absorbing mounting plate (7) is arranged between the energy absorbing mechanism (6) and the lower longitudinal beam (3); and the mounting bracket (8) is arranged between the energy absorbing mounting plate (7) and the lower longitudinal beam (3).

4. The front end assembly of the vehicle body according to claim 3, characterized in that: A reinforcement cavity (9) is formed between the mounting bracket (8), the energy absorbing mounting plate (7) and the lower longitudinal beam (3); an auxiliary bracket (10) is provided in the reinforcement cavity (9); and the auxiliary bracket (10) divides the reinforcement cavity (9) into a plurality of sub-cavities.

5. The front end assembly of the vehicle body according to claim 4, characterized in that: A bridging ring (11) is provided in the reinforcement cavity (9), and the energy absorbing mounting plate (7), the mounting bracket (8), the auxiliary bracket (10) and the lower longitudinal beam (3) are all connected to the bridging ring (11).

6. The front end assembly of the vehicle body according to claim 3, characterized in that: The bridging portion (4) further comprises a reinforcing bracket (12), one end of the reinforcing bracket (12) being connected to the mounting bracket (8), and the other end of the reinforcing bracket (12) being connected to the bridging beam (5).

7. The front end assembly of the vehicle body according to claim 3, characterized in that: A protective cover (13) is provided between the bridging beam (5) and the lower longitudinal beam (3); a closed ring structure is formed between the lower longitudinal beam (3), the protective cover (13), the bridging beam (5) and the mounting bracket (8).

8. The front end assembly of the vehicle body according to claim 1, characterized in that: A shock-absorbing tower (14) is connected between the upper longitudinal beam (2) and the lower longitudinal beam (3); a first reinforcement portion (15) is provided on the inner cavity wall of the shock-absorbing tower (14); and a second reinforcement portion (16) is provided between the first reinforcement portion (15) and the lower longitudinal beam (3).

9. The vehicle front end assembly according to any one of claims 1 to 8, characterized in that: The cross section of the bridging portion (4) along the horizontal section and the cross section along the vertical section are both multi-cavity structures.

10. A vehicle, characterized in that: The vehicle body front end assembly comprises the vehicle body front end assembly according to any one of claims 1 to 9.

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