A front-end frame structure for automobiles

Abstract

This invention proposes a front-end frame structure for automobiles, belonging to the automotive field. It includes a first vertical beam and a second vertical beam spaced apart. The ends of both the first and second vertical beams on the same side are connected to a first horizontal beam, and the other ends of both are connected to a second horizontal beam. Both ends of the first and second horizontal beams are bent and extended in the same direction. The end faces of the first and second horizontal beams on the same side are connected to the same tubular beam structure. One end of the tubular beam structure near the second horizontal beam is connected to one end of a third tubular beam, and the other end of the third tubular beam is connected to the middle of the tubular beam structure. The third tubular beam and the tubular beam structure are connected to form a frame. This invention improves strength and enhances safety by forming a frame through the connection of the third tubular beam and the tubular beam structure, while also preventing injuries or fatalities caused by side collisions.

Description

Technical Field

[0001] This invention belongs to the automotive field, and specifically relates to a front-end frame structure for automobiles. Background Technology

[0002] The automotive front-end module is a crucial component of the vehicle's front frame, primarily serving to support and mount the cooling module and providing essential pedestrian protection. Given that many traffic accidents involve side impacts, designing a front-end frame structure that meets various performance specifications and offers high overall cost-effectiveness is highly significant for the side headlight area.

[0003] In addition, the front structure provides mounting points for the front bumper, left and right headlights, hood latches, front radar, and the front of the powertrain. It must not only accommodate the installation of all functional components but also ensure the vehicle conforms to GD&T (Geometric Dimensioning and Tolerancing, which describes the required level of precision for each controlled feature of a component, defining the possible size of each feature and the permissible variations in its orientation and position) to guarantee the best possible appearance and ultimately play a crucial role in safety and aesthetics. Therefore, the front structure of a non-load-bearing body requires a highly precise design, considering both the accuracy of the mounting points and the dimensional tolerances of the multi-component assembly.

[0004] Most car models on the market today are designed with a traditional monocoque body structure. This structure involves welding a large number of parts, which means there is no room for tolerance chain absorption. The tolerance of the overall vehicle size, especially the front mounting size, accumulates in one direction, leading to difficulties in the installation of parts and deviations from the GD&T design when installing the exterior trim.

[0005] Therefore, a new type of automotive front-end frame structure is needed to meet the above requirements. Summary of the Invention

[0006] To address the above problems, this invention proposes a front-end frame structure for automobiles, comprising a first vertical beam and a second vertical beam arranged at intervals.

[0007] Both the first and second vertical beams are connected to the first horizontal beam at their ends on the same side, and both the first and second vertical beams are connected to the second horizontal beam at their other ends on the same side. Both ends of the first and second horizontal beams are bent and extended in the same direction. Both the end faces of the first and second horizontal beams on the same side are connected to the same tube beam structure. The end of the tube beam structure near the second horizontal beam is connected to one end of the third tube beam, and the other end of the third tube beam is connected to the middle of the tube beam structure. The third tube beam and the tube beam structure are connected to form a frame.

[0008] Furthermore, the tube beam structure includes a first tube beam and a second tube beam connected in sequence, one end of the third tube beam is connected to the end of the first tube beam away from the second tube beam, and the other end of the third tube beam is connected to the middle of the second tube beam. The first tube beam, the second tube beam and the third tube beam form a ring frame, and a headlight mounting point is provided on the ring frame, and a headlight structure is installed on the headlight mounting point.

[0009] Furthermore, a side plate connecting mechanism is connected to the surface of the third tube beam and / or the surface of the second tube beam.

[0010] Furthermore, the side plate connecting mechanism includes a U-shaped plate and an L-shaped plate. The U-shaped plate is fixedly installed on the surface of the third pipe beam and / or the surface of the second pipe beam, and the L-shaped plate is fixedly installed on the end of the U-shaped plate away from the third pipe beam or the second pipe beam; a fender is installed on the L-shaped plate.

[0011] Furthermore, the two tube beam structures are connected by a connecting rod, and a cover plate latch is provided on the upper surface of the connecting rod.

[0012] Furthermore, both ends of the connecting rod are connected to the tube beam structure through a connecting mechanism. The connecting mechanism includes a second connecting plate and a third connecting plate, and a cavity is formed between the second connecting plate, the third connecting plate and the tube beam structure.

[0013] Furthermore, a first connecting plate is provided at the connection between the first tube beam and the third tube beam.

[0014] Furthermore, the first tube beam, the second tube beam, the third tube beam, and the first connecting plate are all integrally formed using hot air expansion and internal high pressure.

[0015] Furthermore, the upper surface of the second crossbeam is connected to the tube beam structure via the first mounting device; the lower surface of the second crossbeam is connected to the tube beam structure via the second mounting device; and the side surface of the second crossbeam is connected to the third tube beam via a crossbeam connecting plate.

[0016] Furthermore, both the first mounting device and the second mounting device are "L"-shaped plates. The first mounting device includes a first plate and a second plate, and the second mounting device includes a third plate and a fourth plate. The first plate and the third plate are respectively mounted on the opposite outer surfaces of the ends of the second crossbeam, and the second plate and the fourth plate overlap. The first plate, the third plate, and the second crossbeam form a space with a cavity.

[0017] Beneficial effects of this invention:

[0018] 1. The present invention forms a frame by connecting the third tube beam and the tube beam structure, thereby improving strength and enhancing safety, while preventing personal injury caused by side collisions.

[0019] 2. The first, second, and third tubular beams of this invention form a ring-shaped frame, on which headlight mounting points are provided, connecting to the headlight structure. By adjusting the position of the headlight mounting points, the position of the headlight structure is adjusted, thereby adjusting the gaps between the headlight structure and the engine hood and fenders, ensuring that the gap between the headlight structure and the fender is 3.5-0.5mm; and the gap between the headlight structure and the engine hood is 0-0.5mm; thus achieving a more aesthetically pleasing vehicle.

[0020] 3. The side panel connecting mechanism of the present invention includes a U-shaped plate and an L-shaped plate. The U-shaped plate is fixedly installed on the surface of the third tube beam and / or the surface of the second tube beam, and the L-shaped plate is fixedly installed on the end of the U-shaped plate away from the third tube beam or the second tube beam. The relative position between the U-shaped plate and the L-shaped plate can be adjusted. Adjusting the position and angle of the fender connected to the L-shaped plate facilitates the adjustment of the gap between the fender and the engine hood and headlight structure, thereby reducing the gap and making the vehicle's appearance more aesthetically pleasing.

[0021] 4. The connecting mechanism of the present invention includes a second connecting plate and a third connecting plate, both of which are U-shaped cavities. The second connecting plate and the third connecting plate are placed opposite each other, and a cavity is formed between the second connecting plate, the third connecting plate and the pipe beam structure, which improves the support strength of the second connecting plate and the third connecting plate. At the same time, the second connecting plate and the third connecting plate are connected to both ends of the first pipe beam, which improves the connection strength.

[0022] 5. The first tube beam, second tube beam, third tube beam, and first connecting plate of the present invention are all integrally formed by hot air expansion and internal high pressure. Its value lies in reducing the cumulative tolerances caused by multi-process stamping; reducing the number of parts due to cumulative tolerances from welding multiple parts; and improving the front-end stiffness mode and reducing deformation during component assembly through the hot air expansion and internal high pressure process.

[0023] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the overall structure of the automotive front-end frame in an embodiment of the present invention is shown.

[0026] Figure 2 A partial structural schematic diagram of the automotive front-end frame structure in an embodiment of the present invention is shown.

[0027] Figure 3 A schematic diagram of the connecting rods and connecting mechanisms of the automotive front-end frame structure in an embodiment of the present invention is shown.

[0028] Figure 4 The diagram shows the installation positions of the engine cover, fender, and headlight structure of the automotive front frame structure in an embodiment of the present invention.

[0029] Figure 5 The diagram shows the installation of the first mounting device and the second connecting plate of the automotive front-end frame structure in an embodiment of the present invention.

[0030] Figure 6 It shows Figure 5 Schematic diagram of section AA.

[0031] Figure 7 A schematic diagram of the crossbeam connecting plate of the automotive front frame structure in an embodiment of the present invention is shown.

[0032] In the diagram, 1. Tube beam structure; 11. First tube beam; 12. Second tube beam; 2. Headlight mounting point; 3. Third tube beam; 4. First connecting plate; 5. Connecting rod; 6. Cover plate latch; 7. Connecting mechanism; 71. Second connecting plate; 72. Third connecting plate; 8. Side plate connecting mechanism; 81. U-shaped plate; 82. L-shaped plate;

[0033] 21. First vertical beam; 22. Second vertical beam; 23. First horizontal beam; 24. Second horizontal beam; 25. Protective horizontal beam; 26. Fourth connecting plate; 27. First mounting device; 2701. First welding positioning hole; 2702. Second welding positioning hole; 2703. Long slot hole; 2704. Mounting hole; 28. Second mounting device; 29. ​​Horizontal beam connecting plate; 2901. First positioning hole; 2902. Second positioning hole; 2903. Wire harness mounting hole; 2904. Connecting hole; 2905. Reinforcing rib;

[0034] 31. Engine cover; 32. Fender; 33. Headlight structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] refer to Figure 1 , Figure 1 This diagram illustrates an overall schematic of a vehicle front-end frame structure according to an embodiment of the present invention. A vehicle front-end frame structure includes a first vertical beam 21 and a second vertical beam 22 spaced apart. The ends of both the first vertical beam 21 and the second vertical beam 22 on the same side are connected to a first horizontal beam 23 (i.e., the lower ends of the first vertical beam 21 and the second vertical beam 22 are connected to the first horizontal beam 23), and the other ends of both the first vertical beam 21 and the second vertical beam 22 on the same side are connected to a second horizontal beam 24 (i.e., the upper ends of the first vertical beam 21 and the second vertical beam 22 are connected to the second horizontal beam 24). The two ends of the first horizontal beam 23 and the second horizontal beam 22... 4. Both ends are bent and extended in the same direction; the end faces of the first crossbeam 23 and the second crossbeam 24 on the same side are connected to the tube beam structure 1 (i.e., the left end face of the first crossbeam 23 and the left end face of the second crossbeam 24 are connected to one tube beam structure 1, and the right end face of the first crossbeam 23 and the right end face of the second crossbeam 24 are connected to another tube beam structure 1); the end of the tube beam structure 1 near the second crossbeam 24 is connected to one end of the third tube beam 3, and the other end of the third tube beam 3 is connected to the middle of the tube beam structure 1. The third tube beam 3 and the tube beam structure 1 are connected to form a frame. This invention improves strength and prevents personal injury caused by side collisions by forming a frame through the connection of the third tube beam 3 and the tube beam structure 1.

[0037] Specifically, the two ends of the first crossbeam 23 are connected to the tube beam structure 1 via the fourth connecting plate 26. A protective crossbeam 25 is installed between the first crossbeam 23 and the second crossbeam 24, with its two ends connected to the first vertical beam 21 and the second vertical beam 22, respectively. The protective crossbeam 25 protrudes away from the ends of the first crossbeam 23 and the second crossbeam 24. Specifically, the first vertical beam 21, the second vertical beam 22, the first crossbeam 23, the second crossbeam 24, and the protective crossbeam 25 are all tube beams. Tube beam structures have simple manufacturing processes, and their shapes can be directly bent and formed according to design requirements, avoiding the stamping process used in traditional sheet metal structures. This avoids the need for multi-stage forming molds, resulting in high mold costs, long mold cycles, and long cycles for subsequent mold modifications, leading to large inventory requirements and increased stocking pressure. The tube beam structure avoids these disadvantages and optimizes and improves manufacturing efficiency.

[0038] refer to Figure 2The tube beam structure 1 includes a first tube beam 11 and a second tube beam 12 connected in sequence. One end of the third tube beam 3 is connected to the end of the first tube beam 11 away from the second tube beam 12, and the other end of the third tube beam 3 is connected to the middle of the second tube beam 12. The first tube beam 11, the second tube beam 12 and the third tube beam 3 form a ring frame. A headlight mounting point 2 is provided on the ring frame, and a headlight structure 33 is installed on the headlight mounting point 2.

[0039] By adjusting the shape and connection position of the first tube beam 11, the second tube beam 12 and the third tube beam 3, the wheel rim of the entire vehicle can be adjusted, thereby adjusting the position and shape of the headlight structure 33, and thus adjusting the gap between the headlight structure 33 and the engine cover 31 and the fender 32.

[0040] By adjusting the position of the headlight mounting point 2, the position of the headlight structure 33 is adjusted, thereby adjusting the gaps between the headlight structure 33 and the engine hood 31 and fender 32. This ensures the gap between the headlight structure 33 and fender 32 is 3.5-0.5mm, and the gap between the headlight structure 33 and engine hood 31 is 0-0.5mm, thus improving the vehicle's aesthetics. This invention, as an adjustable non-load-bearing front-end structure, is adjustable and uses an integrated installation, reducing deviations caused by accumulated tolerance chains. This invention satisfies the installation function while fully considering the structural design of tolerance dimensional chains, significantly improving the quality of exterior assembly and enhancing the overall vehicle's appeal.

[0041] In this invention, a side plate connecting mechanism 8 is welded to the surface of the third pipe beam 3 and / or the surface of the second pipe beam 12.

[0042] Specifically, by moving the side plate connecting mechanism 8 to different positions on the surface of the third tube beam 3 and / or the surface of the second tube beam 12, the position and angle of the fender 32 connected to the side plate connecting mechanism 8 can be adjusted, thereby facilitating the adjustment of the gap between the fender 32 and the engine cover 31 and the headlight structure 33, thus making the gap smaller and the appearance of the car more beautiful.

[0043] Furthermore, the side plate connecting mechanism 8 includes a U-shaped plate 81 and an L-shaped plate 82. The U-shaped plate 81 is fixedly installed on the surface of the third pipe beam 3 and / or the surface of the second pipe beam 12, and the L-shaped plate 82 is fixedly installed on the end of the U-shaped plate 81 away from the third pipe beam 3 or the second pipe beam 12. The relative position between the U-shaped plate 81 and the L-shaped plate 82 can be adjusted.

[0044] Specifically, both the U-shaped plate 81 and the L-shaped plate 82 are formed by stamping and bending a single sheet of material. By adjusting the position and angle of the fender 32 connected to the L-shaped plate 82, it is easier to adjust the gap between the fender 32 and the engine cover 31 and the headlight structure 33, thereby making the gap smaller and the car's appearance more aesthetically pleasing. The gap between the fender 32 and the engine cover 31 is 0.3-3.8mm.

[0045] In the above embodiments, another optional implementation is that the two tube beam structures 1 are connected by a connecting rod 5, and a cover plate latch 6 is provided on the upper surface of the connecting rod 5.

[0046] Specifically, the two cover plate latches 6 are connected by the connecting rod 5, thereby reinforcing the two pipe beam structures 1. An engine cover plate 31 is installed on the surface formed by the two pipe beam structures 1 and the connecting rod 5. The engine cover plate 31 is locked with the connecting rod 5.

[0047] refer to Figure 3 Both ends of the connecting rod 5 are connected to the pipe beam structure 1 via a connecting mechanism 7. The connecting mechanism 7 includes a second connecting plate 71 and a third connecting plate 72, both of which are U-shaped cavities. The second connecting plate 71 and the third connecting plate 72 are placed opposite each other, and a cavity is formed between the second connecting plate 71, the third connecting plate 72, and the pipe beam structure 1. Specifically, the second connecting plate 71 and the third connecting plate 72 are both formed by stamping and bending a single sheet. The relative placement of the second connecting plate 71, the third connecting plate 72, and the pipe beam structure 1 to form a cavity improves the support strength of the second connecting plate 71 and the third connecting plate 72. At the same time, the second connecting plate 71 and the third connecting plate 72 are connected to both ends of the first pipe beam 11, improving the connection strength.

[0048] Furthermore, a first connecting plate 4 is provided at the connection between the first pipe beam 11 and the third pipe beam 3. The first connecting plate 4 improves the connection strength between the first pipe beam 11 and the third pipe beam 3.

[0049] In a specific embodiment, the first tube beam 11, the second tube beam 12, the third tube beam 3, and the first connecting plate 4 are all integrally formed using hot air expansion and internal high pressure. Specifically, the value of integral forming is to reduce the cumulative tolerance caused by multi-process stamping; to reduce the number of parts due to the cumulative tolerance caused by welding of multiple parts; and to improve the front-end stiffness mode and reduce the amount of deformation during component assembly by the hot air expansion and internal high pressure process.

[0050] refer to Figure 2 The upper surface of the second crossbeam 24 is connected to the pipe beam structure 1 through the first mounting device 27, the lower surface of the second crossbeam 24 is connected to the pipe beam structure 1 through the second mounting device 28, and the side surface of the second crossbeam 24 is connected to the third pipe beam 3 through the crossbeam connecting plate 29.

[0051] The second crossbeam 24 is connected to the tube beam structure 1 through the first mounting device 27, the second mounting device 28 and the crossbeam connecting plate 29, thereby improving the strength of the connection, making the frame more robust, the vehicle more crash-resistant and better protecting the safety of the driver and passengers.

[0052] In conjunction with the embodiments of the present invention, both the first mounting device 27 and the second mounting device 28 are "L" shaped plates. The first mounting device 27 includes a first plate and a second plate, and the second mounting device 28 includes a third plate and a fourth plate. The first plate and the third plate are respectively mounted on the opposite outer surfaces of the ends of the second crossbeam 24, and the second plate and the fourth plate overlap. The first plate, the third plate, and the second crossbeam 24 form a space with a cavity.

[0053] Specifically, the first mounting device 27 and the second mounting device 28 are respectively mounted on opposite outer surfaces at the ends of the second crossbeam 24.

[0054] In this invention, both the first mounting device 27 and the second mounting device 28 are L-shaped plates. The first mounting device 27 includes a first plate and a second plate, and the second mounting device 28 includes a third plate and a fourth plate. The first plate and the third plate are respectively mounted on opposite outer surfaces of the ends of the second crossbeam 24, and the second plate and the fourth plate overlap. The first plate, the third plate, and the second crossbeam 24 form a space with a cavity (i.e., forming a box shape).

[0055] Specifically, the two first mounting devices 27 are symmetrical about the second crossbeam 24, and are connected to the first pipe beam 11 by bolts; the two second mounting devices 28 are symmetrical about the second crossbeam 24, and are connected to the first pipe beam 11 by bolts (the overlapping parts of the first mounting devices 27 and the second mounting devices 28 share bolts); the first pipe beam 11 is connected by two fourth connecting plates 26, and the first mounting devices 27 and the second mounting devices 28 are also connected to the first pipe beam 11, which improves the sturdiness.

[0056] like Figure 5 As shown, the first plate and the third plate are welded together to form a box shape, which improves the connection strength of the parts. The first welding positioning hole 2701 is the main welding positioning hole; the second welding positioning hole 2702 is the auxiliary welding positioning hole, used to fix the relative position between the first mounting device 27 and the second mounting device 28; the elongated hole 2703 is for connecting the second mounting device 28, i.e., the first mounting device 27 and the second mounting device 28 are welded together through the elongated hole 2703; the mounting hole 2704 is used for installing the cooling module, and the mounting hole 2704 uses a flanged hole to increase the rigidity of the opening position, such as... Figure 6As shown; in order to enhance the rigidity and strength requirements of the cooling module, the overall structure is bolted to the lower part of the vehicle body, with two sets of first mounting devices 27 and a symmetrical design, so that the vehicle body forms a solid closed structure.

[0057] The crossbeam connecting plate 29 is installed on the outer surface of both ends of the second crossbeam 24. The crossbeam connecting plate 29 has connecting holes 2904, which are connected to the vehicle body via bolts. The crossbeam connecting plate 29 also has reinforcing ribs 2905. Specifically, refer to... Figure 7 The present invention includes two crossbeam connecting plates 29, which are symmetrically installed about a second crossbeam 24. Each crossbeam connecting plate 29 has a first positioning hole 2901, a second positioning hole 2902, a wire harness mounting hole 2903, and a connecting hole 2904. The first positioning hole 2901 and the second positioning hole 2902 are used to assist in positioning the crossbeam connecting plates 29. The wire harness mounting hole 2903 is used for wire harness installation. The connecting hole 2904 is connected to the vehicle body via bolts. Reinforcing ribs 2905 are used to strengthen the crossbeam connecting plates 29, increasing the rigidity of the parts themselves. Figure 7 As shown. The overall structure solves the problem of multiple paths for the transfer of collision energy and also protects the cooling module from damage.

[0058] refer to Figure 4 The plane formed by the tube beam structure 1 and the connecting rod 5 is used to install the engine cover plate 31; the frame formed by the tube beam structure 1 and the third tube beam 3 is used to place the headlight structure 33; the plane formed by the first tube beam 11, the second tube beam 12 and the third tube beam 3 is used to install the fender 32.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A front-end frame structure for automobiles, characterized in that, Includes a first vertical beam (21) and a second vertical beam (22) that are spaced apart; The ends of the first vertical beam (21) and the second vertical beam (22) on the same side are connected to the first horizontal beam (23), and the other ends of the first vertical beam (21) and the second vertical beam (22) on the same side are connected to the second horizontal beam (24); the two ends of the first horizontal beam (23) and the two ends of the second horizontal beam (24) are bent and extended in the same direction; the end faces of the first horizontal beam (23) and the second horizontal beam (24) on the same side are connected to the same tube beam structure (1); the end of the tube beam structure (1) near the second horizontal beam (24) is connected to one end of the third tube beam (3), and the other end of the third tube beam (3) is connected to the middle of the tube beam structure (1); the third tube beam (3) and the tube beam structure (1) are connected to form a frame; The tube beam structure (1) includes a first tube beam (11) and a second tube beam (12) connected in sequence. One end of the third tube beam (3) is connected to the end of the first tube beam (11) away from the second tube beam (12), and the other end of the third tube beam (3) is connected to the middle of the second tube beam (12). The first tube beam (11), the second tube beam (12) and the third tube beam (3) form a ring frame. A headlight mounting point (2) is provided on the ring frame, and a headlight structure (33) is installed on the headlight mounting point (2). The two tube beam structures (1) are connected by a connecting rod (5), and a cover plate latch (6) is provided on the upper surface of the connecting rod (5). Both ends of the connecting rod (5) are connected to the first tube beam (11) through the connecting mechanism (7). The connecting mechanism (7) includes a second connecting plate (71) and a third connecting plate (72), and a cavity is formed between the second connecting plate (71), the third connecting plate (72) and the first tube beam (11).

2. The automotive front-end frame structure according to claim 1, characterized in that, A side plate connecting mechanism (8) is connected to the surface of the third tube beam (3) and / or the surface of the second tube beam (12).

3. The automotive front-end frame structure according to claim 2, characterized in that, The side plate connecting mechanism (8) includes a U-shaped plate (81) and an L-shaped plate (82). The U-shaped plate (81) is fixedly installed on the surface of the third pipe beam (3) and / or the surface of the second pipe beam (12). The L-shaped plate (82) is fixedly installed on one end of the U-shaped plate (81) away from the third pipe beam (3) or the second pipe beam (12). A fender (32) is installed on the L-shaped plate (82).

4. The automotive front-end frame structure according to claim 1, characterized in that, A first connecting plate (4) is provided at the connection between the first tube beam (11) and the third tube beam (3).

5. The automotive front-end frame structure according to claim 4, characterized in that, The first tube beam (11), the second tube beam (12), the third tube beam (3) and the first connecting plate (4) are all integrally formed by hot air expansion and internal high pressure.

6. The automotive front-end frame structure according to claim 1, characterized in that, The upper surface of the second crossbeam (24) is connected to the tube beam structure (1) via the first mounting device (27); the lower surface of the second crossbeam (24) is connected to the tube beam structure (1) via the second mounting device (28); and the side surface of the second crossbeam (24) is connected to the third tube beam (3) via the crossbeam connecting plate (29).

7. A car front-end frame structure according to claim 6, characterized in that, The first mounting device (27) and the second mounting device (28) are both "L" shaped plates. The first mounting device (27) includes a first plate and a second plate, and the second mounting device (28) includes a third plate and a fourth plate. The first plate and the third plate are respectively mounted on the opposite outer surfaces of the ends of the second crossbeam (24), and the second plate and the fourth plate overlap. The first plate, the third plate and the second crossbeam (24) form a space with a cavity.

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