A front subframe

Abstract

This utility model discloses a front subframe, belonging to the field of automotive technology. It solves the problems of low strength and inconvenience in replacing conventional front subframes in the prior art. It mainly includes left and right longitudinal beams, with a front crossbeam and a rear crossbeam respectively installed on the front and rear sides between the two longitudinal beams. A middle crossbeam is also installed between the two longitudinal beams, situated between the front and rear crossbeams. A rear suspension connecting bracket is installed on the top of the middle crossbeam.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology, and more specifically, it relates to a front subframe. Background Technology

[0002] In automotive architecture, the front subframe is a crucial component of the chassis. It serves as a support structure for the suspension, connecting it to the vehicle body. Its primary functions include supporting components such as the steering gear, stabilizer bar, and front suspension arms.

[0003] The current conventional front subframe has the following two problems in application: 1. The current conventional front subframe usually only has two crossbeams, front and rear, which has low strength; 2. The current engine assembly is generally connected to the front subframe through three points: left mount, right mount and rear mount. When the front subframe needs to be replaced, the engine assembly needs to be disassembled together or lifted with lifting tools, which is very troublesome. Summary of the Invention

[0004] The purpose of this utility model is to provide a front subframe to overcome the problems of low strength and inconvenience in replacing conventional front subframes in the prior art.

[0005] This utility model is achieved by the following technical solution: a front subframe, including left and right longitudinal beams, with a front crossbeam and a rear crossbeam respectively installed on the front and rear sides between the two longitudinal beams, and a middle crossbeam installed between the two longitudinal beams, the middle crossbeam being between the front crossbeam and the rear crossbeam, and a rear suspension connecting bracket installed on the top of the middle crossbeam.

[0006] Furthermore, a front overlap plate is installed between the front end of the middle crossbeam and the two side longitudinal beams, and a rear overlap plate is installed between the rear end of the middle crossbeam and the two side longitudinal beams.

[0007] Furthermore, weight-reducing holes are respectively provided on the inner side of the front overlapping plates on both sides.

[0008] Furthermore, a left swing arm connecting plate is installed on the outer side of the left longitudinal beam, and a right swing arm connecting plate is installed on the outer side of the right longitudinal beam.

[0009] Furthermore, a left mounting plate and a right mounting plate are respectively connected to the left and right sides of the front crossbeam. The left mounting plate includes a left inclined section connected to the front crossbeam, which extends to the upper left relative to the front crossbeam. The top of the left inclined section is connected to a left horizontal section extending to the left. The right mounting plate includes a right inclined section connected to the front crossbeam, which extends to the upper right relative to the front crossbeam. The top of the right inclined section is connected to a right horizontal section extending to the right. Front mounting holes are respectively provided on the top surfaces of the left horizontal section and the right horizontal section.

[0010] Furthermore, a left reinforcing plate is installed on the top of the left horizontal section, and left clamping plates are installed on the front and rear sides of the left reinforcing plate respectively. The left horizontal section is located between the two left clamping plates, and the front mounting hole on the left horizontal section passes through the left reinforcing plate. A right reinforcing plate is installed on the top of the right horizontal section, and right clamping plates are installed on the front and rear sides of the right reinforcing plate respectively. The right horizontal section is located between the two right clamping plates, and the front mounting hole on the right horizontal section passes through the right reinforcing plate.

[0011] Furthermore, both the left and right mounting plates are provided with hollow cavities. A support sleeve communicating with its front mounting hole is installed in the hollow cavity of the left mounting plate, and a support sleeve communicating with its front mounting hole is installed in the hollow cavity of the right mounting plate.

[0012] Furthermore, the rear end of the longitudinal beam on the left is inclined to the left to form a left connecting section, and the rear end of the longitudinal beam on the right is inclined to the right to form a right connecting section. Rear mounting holes are respectively provided on the left connecting section and the right connecting section.

[0013] Furthermore, the rear suspension connection bracket includes two side plates, and a rear plate is installed on the rear side between the two side plates. Rear suspension connection holes are respectively provided on the two side plates.

[0014] Furthermore, the longitudinal beam is manufactured using a hydroforming process.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] I. This utility model can effectively improve the strength of the front subframe by setting an intermediate crossbeam between the front and rear crossbeams.

[0017] II. The front subframe of this utility model has only one engine assembly connection point on the middle crossbeam, namely the rear suspension connection bracket. In use, the engine assembly is connected to the rear suspension connection bracket on the middle crossbeam only through the rear suspension. The left and right sides of the engine assembly are connected to the frame through the left and right suspensions, respectively. Thus, when the front subframe is replaced and removed, since the left and right suspensions on the engine assembly are connected to the frame, the frame can support the engine assembly after the front subframe is removed, preventing the engine assembly from falling down with the removal of the front subframe. This eliminates the need to disassemble the engine when replacing the front subframe, greatly saving after-sales labor time and reducing maintenance costs.

[0018] III. The longitudinal beam described in this utility model adopts a hydraulic forming process, which has the following advantages compared with the current longitudinal beam mainly using the stamping sheet metal welding forming process: 1. It can save materials and reduce weight, while reducing production costs and mold costs; 2. It improves the strength and rigidity of the longitudinal beam, and due to the reduction of weld points, it can effectively improve the fatigue strength of the longitudinal beam. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a schematic diagram showing the connection between this utility model and the engine assembly.

[0023] In the diagram: 1. Longitudinal beam; 2. Front crossbeam; 3. Rear crossbeam; 4. Middle crossbeam; 5. Rear suspension connecting bracket; 6. Front overlap plate; 7. Rear overlap plate; 8. Weight reduction hole; 9. Left swing arm connecting plate; 10. Right swing arm connecting plate; 11. Left mounting plate; 12. Right mounting plate; 13. Left tilt section; 14. Left horizontal section; 15. Right tilt section; 16. Right horizontal section; 17. Front mounting hole; 18. Left reinforcing plate; 19. Left clamping plate; 20. Right reinforcing plate; 21. Right clamping plate; 22. Support sleeve; 23. Left connecting section; 24. Right connecting section; 25. Rear mounting hole; 26. Side upright plate; 27. Rear upright plate; 28. Rear suspension connecting hole. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.

[0025] A front subframe includes left and right longitudinal beams 1, symmetrically arranged on both sides. The longitudinal beams 1 are manufactured using a hydroforming process. Compared to the current main method of forming longitudinal beams by stamping sheet metal parts and welding, this invention, by using a hydroforming process for the longitudinal beams 1, has the following advantages: 1. It saves materials and reduces weight, while lowering production costs and mold expenses; 2. It improves the strength and rigidity of the longitudinal beams 1, and due to the reduction in weld points, it effectively improves the fatigue strength of the longitudinal beams 1.

[0026] A front crossbeam 2 and a rear crossbeam 3 are respectively installed on the front and rear sides between the two longitudinal beams 1. A middle crossbeam 4 is also installed between the two longitudinal beams 1, located between the front crossbeam 2 and the rear crossbeam 3. This utility model can effectively improve the strength of the front subframe by setting the middle crossbeam 4 between the front crossbeam 2 and the rear crossbeam 3.

[0027] The top of the intermediate crossbeam 4 is equipped with a rear suspension connection bracket 5. The rear suspension connection bracket 5 includes two side upright plates 26, and a rear upright plate 27 is installed on the rear side between the two side upright plates 26. The two side upright plates 26 are respectively provided with oppositely arranged rear suspension connection holes 28.

[0028] The front subframe of this invention has only one engine assembly connection point on the middle crossbeam 4, namely the rear suspension connection bracket 5. In use, the engine assembly is connected to the rear suspension connection bracket 5 on the middle crossbeam 4 only through the rear suspension. The left and right sides of the engine assembly are connected to the frame through the left and right suspensions, respectively. Thus, when the front subframe is replaced and removed, the frame can support the engine assembly after the front subframe is removed because the left and right suspensions on the engine assembly are connected to the frame. This prevents the engine assembly from falling down when the front subframe is removed, thus eliminating the need to disassemble the engine when replacing the front subframe, greatly saving after-sales labor time and reducing maintenance costs.

[0029] A front lap plate 6 is installed between the front end of the middle crossbeam 4 and the two side longitudinal beams 1, and a rear lap plate 7 is installed between the rear end of the middle crossbeam 4 and the two side longitudinal beams 1. This invention improves the connection strength between the middle crossbeam 4 and the two side longitudinal beams 1 by providing the front lap plate 6 and the rear lap plate 7.

[0030] Weight-reducing holes 8 are respectively provided on the inner side of the front overlapping plates 6 on both sides. By providing weight-reducing holes 8, the weight of the front overlapping plates 6 can be reduced, thereby reducing the weight of the present invention.

[0031] A left swing arm connecting plate 9 is installed on the outer side of the left longitudinal beam 1, and a right swing arm connecting plate 10 is installed on the outer side of the right longitudinal beam 1. The left swing arm connecting plate 9 is used to connect the left swing arm assembly, and the right swing arm connecting plate 10 is used to connect the right swing arm assembly.

[0032] The top surface of the longitudinal beams on both sides of this utility model is also provided with multiple fixing holes for fixing components such as the steering gear assembly and the stabilizer bar assembly.

[0033] The left and right sides of the front crossbeam 2 are respectively connected to a left mounting plate 11 and a right mounting plate 12. The left mounting plate 11 includes a left inclined section 13 connected to the front crossbeam 2. In addition to being welded and fixed to the front crossbeam 2, the left inclined section 13 is also welded and fixed to the left longitudinal beam 1. The left inclined section 13 extends to the upper left relative to the front crossbeam 2, and the top of the left inclined section 13 is connected to a left horizontal section 14 extending to the left.

[0034] The right mounting plate 12 includes a right inclined section 15 connected to the front crossbeam 2. In addition to being welded and fixed to the front crossbeam 2, the right inclined section 15 is also welded and fixed to the right longitudinal beam 1. The right inclined section 15 extends to the upper right relative to the front crossbeam 2, and the top of the right inclined section 15 is connected to the right horizontal section 16 extending to the right.

[0035] The top surfaces of the left horizontal section 14 and the right horizontal section 16 are respectively provided with front mounting holes 17. This utility model is connected to the longitudinal beams of the frame on both sides of the frame through the front mounting holes 17 on the left horizontal section 14 and the right horizontal section 16 respectively.

[0036] A left reinforcing plate 18 is installed at the top of the left horizontal segment 14, and left clamping plates 19 are installed on the front and rear sides of the left reinforcing plate 18, respectively. The left horizontal segment 14 lies between the two left clamping plates 19, and the front mounting hole 17 on the left horizontal segment 14 passes through the left reinforcing plate 18. A right reinforcing plate 20 is installed at the top of the right horizontal segment 16, and right clamping plates 21 are installed on the front and rear sides of the right reinforcing plate 20, respectively. The right horizontal segment 16 lies between the two right clamping plates 21, and the front mounting hole 17 on the right horizontal segment 16 passes through the right reinforcing plate 20. This invention strengthens the structural strength of the left horizontal segment 14 by providing the left reinforcing plate 18, preventing structural deformation of the left horizontal segment 14; similarly, it strengthens the structural strength of the right horizontal segment 16 by providing the right reinforcing plate 20, preventing structural deformation of the right horizontal segment 16.

[0037] Both the left mounting plate 11 and the right mounting plate 12 are provided with hollow cavities. A support sleeve 22 communicating with its front mounting hole 17 is installed in the hollow cavity of the left mounting plate 11, and a support sleeve 22 communicating with its front mounting hole 17 is installed in the hollow cavity of the right mounting plate 12. By providing the support sleeve 22, this utility model can further enhance the structural strength of the left horizontal section 14 and the right horizontal section 16.

[0038] The rear end of the left longitudinal beam 1 is inclined to the left to form a left connecting section 23, and the rear end of the right longitudinal beam 1 is inclined to the right to form a right connecting section 24. Rear mounting holes 25 are respectively provided on the left connecting section 23 and the right connecting section 24. This utility model connects to the longitudinal beams of the frame on both sides of the vehicle frame through the rear mounting holes 25 on the left connecting section 23 and the right connecting section 24, respectively.

Claims

1. A front subframe characterized by, It includes left and right longitudinal beams (1), front crossbeam (2) and rear crossbeam (3) are installed on the front and rear sides between the two longitudinal beams (1), and a middle crossbeam (4) is also installed between the two longitudinal beams (1). The middle crossbeam (4) is between the front crossbeam (2) and the rear crossbeam (3), and a rear suspension connecting bracket (5) is installed on the top of the middle crossbeam (4).

2. A front subframe according to claim 1, characterized in that A front overlap plate (6) is installed between the front end of the middle crossbeam (4) and the two side longitudinal beams (1), and a rear overlap plate (7) is installed between the rear end of the middle crossbeam (4) and the two side longitudinal beams (1).

3. A front subframe according to claim 2, characterized in that Weight reduction holes (8) are respectively provided on the inner side of the front overlapping plate (6) on both sides.

4. A front subframe according to claim 1, characterized in that A left swing arm connecting plate (9) is installed on the outer side of the left longitudinal beam (1), and a right swing arm connecting plate (10) is installed on the outer side of the right longitudinal beam (1).

5. A front subframe according to claim 1, characterized in that, The left and right sides of the front crossbeam (2) are respectively connected to a left mounting plate (11) and a right mounting plate (12). The left mounting plate (11) includes a left inclined section (13) connected to the front crossbeam (2). The left inclined section (13) extends to the upper left relative to the front crossbeam (2). The top of the left inclined section (13) is connected to a left horizontal section (14) extending to the left. The right mounting plate (12) includes a right inclined section (15) connected to the front crossbeam (2). The right inclined section (15) extends to the upper right relative to the front crossbeam (2). The top of the right inclined section (15) is connected to a right horizontal section (16) extending to the right. The top surfaces of the left horizontal section (14) and the right horizontal section (16) are respectively provided with front mounting holes (17).

6. A front subframe according to claim 5, characterized in that A left reinforcing plate (18) is installed on the top of the left horizontal section (14), and left clamping plates (19) are installed on the front and rear sides of the left reinforcing plate (18). The left horizontal section (14) is between the two left clamping plates (19), and the front mounting hole (17) on the left horizontal section (14) passes through the left reinforcing plate (18). A right reinforcing plate (20) is installed on the top of the right horizontal section (16), and right clamping plates (21) are installed on the front and rear sides of the right reinforcing plate (20). The right horizontal section (16) is between the two right clamping plates (21), and the front mounting hole (17) on the right horizontal section (16) passes through the right reinforcing plate (20).

7. A front subframe according to claim 5, characterized in that Both the left mounting plate (11) and the right mounting plate (12) are provided with hollow cavities. The hollow cavity of the left mounting plate (11) is equipped with a support sleeve (22) that communicates with its front mounting hole (17), and the hollow cavity of the right mounting plate (12) is equipped with a support sleeve (22) that communicates with its front mounting hole (17).

8. A front subframe according to claim 1, characterized in that The rear end of the longitudinal beam (1) on the left side is inclined to the left to form a left connecting section (23), and the rear end of the longitudinal beam (1) on the right side is inclined to the right to form a right connecting section (24). The left connecting section (23) and the right connecting section (24) are respectively provided with rear mounting holes (25).

9. A front subframe according to claim 1, characterized in that The rear suspension connection bracket (5) includes two side upright plates (26), and a rear upright plate (27) is installed on the rear side between the two side upright plates (26). The two side upright plates (26) are respectively provided with oppositely arranged rear suspension connection holes (28).

10. A front subframe according to any one of claims 1-9, characterized in that The longitudinal beam (1) is manufactured using a hydroforming process.

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