A rear subframe welding assembly

Abstract

The present application relates to the technical field of rear subframe, and proposes a rear subframe welding assembly which is made of simple structure components and has a large protection area, low production process requirement, low manufacturing cost, good structural strength, good ventilation effect, good dryness maintenance of the frame, and is practical, comprising four stabilizer bar mounting supports, a first rectangular tube and a second rectangular tube, the first rectangular tube is connected with a first elbow pipe at both ends, the second rectangular tube is connected with a second elbow pipe at both ends, the four stabilizer bar mounting supports are connected at the top of the two first elbow pipes and the top of the two second elbow pipes, a plurality of sheet metal shelves are connected between the first rectangular tube and the second rectangular tube, two sheet metal flanges with opposite directions are arranged on each of the plurality of sheet metal shelves, a bottom strip hole is formed in each of the plurality of sheet metal shelves, a plurality of sheet metal side frames are fixedly connected to the first rectangular tube and the second rectangular tube, and each of the plurality of sheet metal side frames is provided with an inclined surface.

Description

Technical Field

[0001] This invention relates to the field of rear subframe technology, and more specifically to a rear subframe welded assembly. Background Technology

[0002] As is well known, the rear subframe can be regarded as the skeleton of the rear axle and is a component of the rear axle. The rear subframe is not a complete frame, but only a bracket that supports the rear axle and rear suspension, allowing the rear axle and rear suspension to be connected to the main frame through it. The subframe can effectively isolate vibration and noise, reducing the direct entry of vibration and noise into the passenger compartment. Therefore, it is mostly found in luxury cars and SUVs. To facilitate the connection and installation of the rear axle, rear suspension and main frame, a welded rear subframe assembly is proposed.

[0003] A search revealed that Chinese invention patent application number CN201210227803.1 discloses a rear subframe assembly for automobiles. Its general description includes a rear subframe outer plate formed by stamping steel sheet and a rear subframe inner plate formed by stamping steel sheet and welded to the outer plate. The outer plate has stabilizer bar mounting brackets integrated with it at both ends, and the inner plate has recesses integrated with it at both ends, smaller than the outer plate. The connecting end of the stabilizer bar mounting bracket volume of the outer panel of the rear subframe, the front side of the outer panel of the rear subframe is provided with an adjustment hole for adjusting the wheel track of the vehicle body, and the outer surface of the inner panel of the rear subframe is provided with a stamped positioning groove. In use, due to the use of the stabilizer bar mounting bracket integrated with the outer panel of the rear subframe and the connecting end integrated with the inner panel of the rear subframe, the load-bearing capacity of the rear subframe assembly is improved on the one hand, and the service life of the rear subframe assembly is improved on the other hand.

[0004] While the aforementioned existing technical solutions can improve the load-bearing capacity and extend the service life of the rear subframe assembly to some extent, their overall dimensions are relatively long and narrow, so the structural strength needs to be improved and the protection area is small. At the same time, we also note that in reality, in order to increase the protection area, a large-area sheet metal structure rear subframe has emerged. The main body of this type of frame is made of sheet metal stamping, which requires strict sheet metal processing and has high manufacturing costs. Furthermore, due to the use of a large-area sheet metal structure, the ventilation effect is poor, which can easily cause moisture and mold inside the frame, resulting in poor practicality. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a rear subframe welded assembly, which is assembled from simple structural components. It has a large protective area, low requirements for production processes, low manufacturing costs, good structural strength, good ventilation, and good internal dryness retention, making it quite practical.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a rear subframe welding assembly, comprising four stabilizer bar mounting brackets, and further comprising a first rectangular tube and a second rectangular tube. Both ends of the first rectangular tube are fixedly connected to a first bent tube, and both ends of the second rectangular tube are fixedly connected to a second bent tube. The four stabilizer bar mounting brackets are respectively fixedly connected to the top ends of two first bent tubes and two second bent tubes. Multiple sheet metal frames are fixedly connected between the first and second rectangular tubes. Each of the multiple sheet metal frames has two sheet metal flanges facing opposite directions, and the bottom ends of the multiple sheet metal frames are formed with... The first rectangular tube and the second rectangular tube have bottom strip holes. Multiple sheet metal side brackets are fixedly connected to the opposite ends of each other. Each sheet metal side bracket has a sloping surface at its bottom, and multiple side strip holes are provided on the sloping surface. An auxiliary mounting bracket is fixedly connected to the top of each sheet metal side bracket. Multiple first bottom mounting brackets are fixedly connected to the bottom of the first rectangular tube, and the tops of the multiple first bottom mounting brackets are respectively fixedly connected to the bottom of multiple sheet metal brackets. Multiple second bottom mounting brackets are fixedly connected to the bottom of the second rectangular tube, and the tops of the multiple second bottom mounting brackets are respectively fixedly connected to the bottom of multiple sheet metal brackets.

[0009] Based on the aforementioned scheme, the top ends of the first rectangular tube and the second rectangular tube are provided with multiple auxiliary support pads, and the top ends of the multiple sheet metal frame frames and the multiple sheet metal side frames are flush with the bottom ends of the auxiliary support pads.

[0010] In a preferred embodiment based on the aforementioned scheme, a bridge rod is provided inside the sheet metal frame, and the two ends of the bridge rod are respectively fixedly connected to the ends of the first rectangular tube and the second rectangular tube that are close to each other.

[0011] Furthermore, based on the aforementioned scheme, both the first and second bottom mounting brackets are provided with mounting slots.

[0012] Furthermore, based on the aforementioned solution, multiple sheet metal side frames are fixedly connected with reinforcing ribs, and the multiple reinforcing ribs are respectively fixedly connected to the opposite ends of the first rectangular tube and the second rectangular tube.

[0013] Furthermore, based on the aforementioned scheme, multiple weight-reducing holes are provided on both the first rectangular tube and the second rectangular tube.

[0014] As a further step of the above solution, the bottom end of the auxiliary mounting bracket is provided with a leveling groove that matches the sheet metal side frame, and the auxiliary mounting bracket is provided with three auxiliary mounting holes.

[0015] As a further step of the above solution, the sheet metal side frame has two through holes, which coincide with the two auxiliary mounting holes closest to the sheet metal frame among the three auxiliary mounting holes.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a rear subframe welded assembly, which has the following beneficial effects:

[0018] 1. In this invention, the main structure of the rear subframe welding assembly is formed by the cooperation of the first rectangular tube, the second rectangular tube and multiple sheet metal frames. The whole assembly is made of simple structural parts, which has a large protective area and low requirements for production process, resulting in low manufacturing cost.

[0019] 2. In this invention, the design of sheet metal flanges improves the structural strength of the sheet metal frame and enhances the protection of the corresponding automotive components mounted on the rear subframe welding assembly. The cooperation of the stabilizer bar mounting bracket, the first bend, and the second bend facilitates the connection between the rear subframe welding assembly and the main frame. The cooperation of the sheet metal side frame and the auxiliary mounting bracket enables the auxiliary connection between the rear subframe welding assembly and the main frame and the vehicle body. With multiple connection points, the connection is more reliable.

[0020] 3. In this invention, the opening of bottom strip holes and side strip holes can improve the internal and external ventilation of the sheet metal frame and sheet metal side frame, resulting in better ventilation and better dryness retention inside the frame. At the same time, it can effectively reduce the overall weight of the rear subframe welding assembly, making it quite practical. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0022] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0023] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the local structure at point B;

[0024] Figure 4 This is a three-dimensional structural diagram of the bridge rod of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the entire invention viewed from below;

[0026] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point C in the middle;

[0027] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the local structure at point D;

[0028] Figure 8 This is a three-dimensional structural diagram showing the disassembled assembly of the auxiliary mounting bracket and sheet metal side frame of the present invention.

[0029] In the diagram: 1. Stabilizer bar mounting bracket; 2. First rectangular tube; 3. Second rectangular tube; 4. First bend; 5. Second bend; 6. Sheet metal frame; 7. Sheet metal flange; 8. Bottom strip hole; 9. Sheet metal side frame; 10. Sloping surface; 11. Side strip hole; 12. Auxiliary mounting bracket; 13. First bottom mounting bracket; 14. Second bottom mounting bracket; 15. Auxiliary support pad; 16. Bridge rod; 17. Mounting strip opening; 18. Reinforcing rib plate; 19. Weight reduction hole; 20. Leveling groove; 21. Auxiliary mounting hole; 22. Through hole. Detailed Implementation

[0030] 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, and 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.

[0031] Example

[0032] Please see Figure 1-8A rear subframe welding assembly includes four stabilizer bar mounting brackets 1, a first rectangular tube 2, and a second rectangular tube 3. First bent tubes 4 are welded and fixedly connected to both ends of the first rectangular tube 2, and second bent tubes 5 are welded and fixedly connected to both ends of the second rectangular tube 3. The four stabilizer bar mounting brackets 1 are welded and fixedly connected to the top ends of two first bent tubes 4 and two second bent tubes 5, respectively. The cooperation of the stabilizer bar mounting brackets 1, the first bent tubes 4, and the second bent tubes 5 facilitates the connection between the rear subframe welding assembly and the main frame. Multiple sheet metal frames 6 are welded and fixedly connected between the first rectangular tubes 2 and the second rectangular tubes 3. The cooperation of the first rectangular tubes 2, the second rectangular tubes 3, and the multiple sheet metal frames 6 forms the main structure of the rear subframe welding assembly. Its overall design is simple. It is assembled from single structural components, which has a large protective area and low requirements for production process, resulting in low manufacturing cost. The sheet metal frame 6 is equipped with a bridge rod 16. The two ends of the bridge rod 16 are welded and fixed to the ends of the first rectangular tube 2 and the second rectangular tube 3 that are close to each other. The bridge rod 16 has a gradient structure that is high in the middle and low at both ends. The bridge rod 16 is nested inside the sheet metal frame 6, that is, the highest position of the bridge rod 16 is lower than the highest position of the sheet metal frame 6. Each of the sheet metal frames 6 is provided with two sheet metal flanges 7 in opposite directions. Through the design of the sheet metal flanges 7, the structural strength of the sheet metal frame 6 is improved on the one hand, and the protection of the corresponding car parts assembled on the rear subframe welding assembly is improved on the other hand. The bottom of each of the sheet metal frames 6 is provided with bottom strip holes 8.

[0033] It should be further explained that multiple sheet metal side frames 9 are welded and fixedly connected to the far ends of the first rectangular tube 2 and the second rectangular tube 3. Each sheet metal side frame 9 has a ramp surface 10 at its bottom end, and multiple side strip holes 11 are provided on the ramp surface 10. The opening of the bottom strip holes 8 and the side strip holes 11 improves the internal and external ventilation of the sheet metal frame 6 and the sheet metal side frames 9, resulting in better ventilation. This improves the internal dryness retention of the rear subframe welded assembly and effectively reduces the overall weight of the rear subframe welded assembly, making it quite practical. Each sheet metal side frame 9 has an auxiliary mounting bracket 12 fixedly connected to its top end. Through the cooperation of the sheet metal side frames 9 and the auxiliary mounting bracket 12, the auxiliary stabilizer bar mounting bracket 1 realizes the installation of the rear subframe... The auxiliary connection between the frame welding assembly and the main frame and body has multiple connection points, making the connection relatively reliable. The bottom end of the auxiliary mounting bracket 12 is provided with a leveling groove 20 that matches the sheet metal side frame 9, which increases the contact area between the auxiliary mounting bracket 12 and the sheet metal side frame 9, improves the connection reliability, and ensures the structural strength between the two. The auxiliary mounting bracket 12 is provided with three auxiliary mounting holes 21, which facilitates the connection and installation between the auxiliary mounting bracket 12 and the external main frame or body. The sheet metal side frame 9 is provided with two through holes 22, which coincide with the two auxiliary mounting holes 21 closest to the sheet metal frame 6, respectively, which facilitates the passage of connecting bolts when the auxiliary mounting bracket 12 is connected to the main frame or body.

[0034] Furthermore, it should be noted that multiple first bottom mounting brackets 13 are welded and fixedly connected to the bottom end of the first rectangular tube 2, and the top ends of the multiple first bottom mounting brackets 13 are respectively welded and fixedly connected to the bottom ends of multiple sheet metal frame 6. Multiple second bottom mounting brackets 14 are fixedly connected to the bottom end of the second rectangular tube 3, and the top ends of the multiple second bottom mounting brackets 14 are respectively welded and fixedly connected to the bottom ends of the multiple sheet metal frame 6. Multiple auxiliary support pads 15 are provided at the top ends of both the first rectangular tube 2 and the second rectangular tube 3. The top ends of the multiple sheet metal frame 6 and the multiple sheet metal side frame 9 are flush with the bottom ends of the auxiliary support pads 15, improving the auxiliary support for the first rectangular tube 2 and the second rectangular tube 3 and the structures or devices above them. The first bottom mounting bracket 13 and the second bottom mounting bracket 14... Each of the four sections has an installation slot 17 to facilitate the installation of external vehicle wheel assembly running gear. Multiple sheet metal side frames 9 are fixedly connected with reinforcing ribs 18, which are welded and fixedly connected to the opposite ends of the first rectangular tube 2 and the second rectangular tube 3, respectively, to improve the structural strength between the sheet metal side frame 9 connected to the first rectangular tube 2 and the second rectangular tube 3. Multiple weight-reducing holes 19 are provided on the first rectangular tube 2 and the second rectangular tube 3 to reduce the weight of the first rectangular tube 2 and the second rectangular tube 3 while ensuring the overall structural strength of the first rectangular tube 2 and the second rectangular tube 3.

[0035] In summary, during the production of this rear subframe welding assembly, each part is first cut. Standard profiles are used preferentially where possible. For parts that cannot be directly made from standard profiles, standard sheet metal is used for sheet metal processing. After processing, the welding assembly is started. During the welding process, the two ends of the bridge rod 16 are first welded to the first rectangular tube 2 and the second rectangular tube 3 respectively. During welding, local spot welding is used first, followed by full welding. During spot welding, attention should be paid to the sufficiency and uniformity of the spot welding positions. During full welding, diagonal welding and segmented welding are used to balance welding stress and reduce structural deformation after welding by filling in any missing welds. Then, the sheet metal frame 6 is welded. During the welding of the sheet metal frame 6, the sheet metal frame 6 is first moved relative to the bridge rod 16 so that the bridge rod 16 sinks into the middle area of ​​the sheet metal frame 6. Finally, the sheet metal frame 6 is welded relative to the first rectangular tube 2 and the second rectangular tube 3. After welding is completed, welding of multiple sheet metal side frames 9 is initiated. Then, the reinforcing ribs 18 on the sheet metal side frames 9 are welded. After welding is completed, welding of auxiliary mounting brackets 12, first bend 4, second bend 5 and stabilizer bar mounting brackets 1 are performed respectively. Finally, the first bottom mounting bracket 13 and the second bottom mounting bracket 14 are welded to their respective positions. During the welding process, the position can be pre-marked or welding jigs can be used as needed. When in use, the rear axle and rear suspension components are first installed on the rear subframe welding assembly. Then, the rear subframe welding assembly is connected to the main frame to complete the installation. The rear subframe welding assembly after installation has a large protective area and large gaps in the structure to ensure necessary ventilation. At the same time, external bottom protection plates can be selected and installed according to the needs of use, ensuring the protective effect while making the maintenance and replacement of the bottom protection plates more convenient.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rear subframe welded assembly, comprising four stabilizer bar mounting brackets (1), characterized in that, It also includes a first rectangular tube (2) and a second rectangular tube (3). The first rectangular tube (2) is fixedly connected to both ends of a first bent tube (4), and the second rectangular tube (3) is fixedly connected to both ends of a second bent tube (5). Four stabilizer mounting supports (1) are fixedly connected to the top ends of the two first bent tubes (4) and the two second bent tubes (5), respectively. Multiple sheet metal frames (6) are fixedly connected between the first rectangular tube (2) and the second rectangular tube (3). Each of the multiple sheet metal frames (6) is provided with two sheet metal flanges (7) in opposite directions. The bottom ends of the multiple sheet metal frames (6) are provided with bottom strip holes (8). The first rectangular tube (2) and the second rectangular tube (3) are far apart from each other. One end of each of the sheet metal side frames (9) is fixedly connected to a plurality of sheet metal side frames (9), the bottom end of each of the plurality of sheet metal side frames (9) is provided with a slope surface (10), the slope surface (10) is provided with a plurality of side strip holes (11), the top end of each of the plurality of sheet metal side frames (9) is fixedly connected to an auxiliary mounting bracket (12), the bottom end of the first rectangular tube (2) is fixedly connected to a plurality of first bottom mounting brackets (13), the top end of each of the plurality of first bottom mounting brackets (13) is fixedly connected to the bottom end of a plurality of sheet metal plate frames (6), the bottom end of the second rectangular tube (3) is fixedly connected to a plurality of second bottom mounting brackets (14), the top end of each of the plurality of second bottom mounting brackets (14) is fixedly connected to the bottom end of a plurality of sheet metal plate frames (6).

2. The rear subframe welding assembly according to claim 1, characterized in that, The top ends of the first rectangular tube (2) and the second rectangular tube (3) are provided with multiple auxiliary support pads (15), and the top ends of the multiple sheet metal frame (6) and the multiple sheet metal side frame (9) are flush with the bottom end of the auxiliary support pads (15).

3. The rear subframe welding assembly according to claim 2, characterized in that, The sheet metal frame (6) is provided with a bridge rod (16), and the two ends of the bridge rod (16) are fixedly connected to the ends of the first rectangular tube (2) and the second rectangular tube (3) that are close to each other.

4. The rear subframe welding assembly according to claim 3, characterized in that, Mounting slots (17) are provided on both the first bottom mounting bracket (13) and the second bottom mounting bracket (14).

5. A rear subframe welding assembly according to claim 4, characterized in that, Each of the sheet metal side frames (9) is fixedly connected with a reinforcing rib plate (18), and the reinforcing rib plates (18) are respectively fixedly connected to the opposite ends of the first rectangular tube (2) and the second rectangular tube (3).

6. A rear subframe welding assembly according to claim 5, characterized in that, Multiple weight-reducing holes (19) are provided on both the first rectangular tube (2) and the second rectangular tube (3).

7. A rear subframe welding assembly according to claim 6, characterized in that, The bottom end of the auxiliary mounting bracket (12) is provided with a leveling groove (20) that matches the sheet metal side frame (9), and the auxiliary mounting bracket (12) is provided with three auxiliary mounting holes (21).

8. A rear subframe welding assembly according to claim 7, characterized in that, The sheet metal side frame (9) has two through holes (22), and the two through holes (22) coincide with the two auxiliary mounting holes (21) that are closer to the sheet metal frame (6) among the three auxiliary mounting holes (21).

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