Rear bumper assembly of pickup truck with trailer function and machining and assembling method

Abstract

The invention provides a rear bumper assembly of a pickup truck with a trailer function, which comprises a rear bumper trailer cross beam, the rear bumper trailer cross beam comprises a beam body and connecting support parts welded and fixed at two ends of the beam body, L-shaped connecting plates are fixed on the connecting support parts through bolts, and a connecting part is fixed at the center of the beam body; the rear bumper assembly of the pickup truck with the trailer function comprises an inner integrated welding metal plate support, the inner integrated welding metal plate support comprises an inner side rear bumper lower protection plate and an outer side rear bumper upper protection plate fixed to the outer side of the inner side rear bumper lower protection plate in a welded mode, and the rear bumper assembly of the pickup truck with the trailer function is divided into a plurality of sub-modules. All the modules are manufactured in independent production units strictly according to the high-precision quality standard. In the final assembly stage, all the modules can be quickly spliced by using a pre-designed standardized interface. The process greatly reduces complex operation of repeated debugging and positioning in traditional assembly, and the assembly period is effectively shortened.

Description

Technical Field

[0001] The present invention relates to the field of bumpers, and in particular to the ultimate comfort and fully automatic functions of seats. Background Art

[0002] In the automotive engineering field, the trailer rear bumper assembly is a critical functional component of the vehicle. Its structural design and functional implementation have a critical impact on the vehicle's overall performance and usability. Traditional pickup truck rear bumpers are mostly made of metal, which, while providing a certain degree of strength, has exposed many drawbacks in actual use.

[0003] From the perspective of aerodynamics and energy consumption, traditional metal pickup truck rear bumpers, due to their relatively simple design, are unable to effectively direct airflow behind the vehicle. According to aerodynamic principles, airflow passing over such rear bumpers tends to generate significant turbulence, leading to a significant increase in wind resistance. This increase in wind resistance is directly related to the vehicle's energy consumption during driving, resulting in a significant increase in fuel consumption. Research shows that under the same driving conditions, every 10% increase in wind resistance can increase fuel consumption by 5%-8%, which undoubtedly increases the user's financial costs over the long term.

[0004] In terms of design and market acceptance, traditional pickup truck rear bumpers require a relatively simple styling, resulting in a rigid overall appearance. In today's automotive market, consumers' aesthetic preferences for vehicle appearance are becoming increasingly diverse and personalized, and vehicle design has become a key factor influencing consumer purchasing decisions. This lack of design appeal fails to meet consumers' pursuit of aesthetics and uniqueness, thus dampening their purchasing desire and limiting the product's market competitiveness.

[0005] Therefore, it is necessary to provide a new rear bumper assembly of a pickup truck with a trailer function and a processing and assembly method to solve the above technical problems. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a rear bumper assembly for a pickup truck with a trailer function, comprising: a rear bumper trailer cross beam, the rear bumper trailer cross beam comprising a beam body and connecting support portions welded to both ends of the beam body, an L-shaped connecting plate being fixed to the connecting support portion by bolts, and a connecting portion being fixed at the center of the beam body;

[0007] An internally integrated welded sheet metal bracket, the internally integrated welded sheet metal bracket comprising an inner rear bumper lower guard plate and an outer rear bumper upper guard plate welded and fixed to the outer side of the inner rear bumper lower guard plate, a left rear bumper lower mounting bracket and a right rear bumper lower mounting bracket being fixed to the inner ends of the outer rear bumper upper guard plate, and a rear left mounting bracket and a rear right mounting bracket being welded between the left rear bumper lower mounting bracket and the right rear bumper lower mounting bracket and the inner rear bumper lower guard plate;

[0008] The rear bumper skin is arranged on the outside of the internal integrated welded sheet metal bracket and is connected to the internal integrated welded sheet metal bracket by puncture welding or bolt fastening. The rear bumper trailer cross beam is arranged on the inside of the rear bumper skin, and the internal integrated welded sheet metal bracket is welded and fixedly connected to the rear bumper trailer cross beam.

[0009] Plastic parts are welded and fixed at both ends of the inner wall of the rear bumper surface, and the left rear bumper lower mounting bracket and the right rear bumper lower mounting bracket are connected to the plastic parts by screws;

[0010] The pedal module is set on top of the internal integrated welded sheet metal bracket, and the pedal module is embedded in the top of the rear bumper skin.

[0011] Preferably, the beam body is hollow, and includes a horizontal portion and upwardly inclined portions provided at both ends of the horizontal portion and connected to the connecting support portion.

[0012] Preferably, the connecting portion includes a square sleeve for connecting to the vehicle frame and a wrapping portion fixed to the top of the square sleeve, and the wrapping portion is wrapped around the outside of the horizontal portion.

[0013] Preferably, a V-shaped buckle is provided on the inner side of the pedal module, and a slot is provided on the rear bumper surface, the inner rear bumper lower guard plate and the outer rear bumper upper guard plate. The V-shaped buckle cooperates with the slot to facilitate the installation and removal of the pedal module.

[0014] Preferably, a positioning column is provided on the inner side of the pedal module, and positioning holes that cooperate with the positioning column are provided on the rear bumper surface, the inner rear bumper lower guard plate and the outer rear bumper upper guard plate to facilitate the positioning of the pedal module and the rear bumper surface.

[0015] Preferably, an intermediate bracket for connecting to the vehicle frame is symmetrically welded and fixed to the inner side of the inner rear bumper lower guard plate.

[0016] A method for processing and assembling a rear bumper assembly of a pickup truck with a trailer function is characterized by comprising the following steps:

[0017] S1. Preparation of the rear trailer beam: Weld the beam and the connecting support into shape. Weld the connecting section at the center of the beam. Bolt L-shaped connecting plates at both ends of the connecting support.

[0018] S2. Internal Bracket Welding: Weld the outer rear bumper upper guard plate to the outer side of the inner rear bumper lower guard plate. Weld the left and right rear bumper lower mounting brackets to each end of the guard plate assembly. Weld the rear left and right mounting brackets between each mounting bracket and the inner guard plate.

[0019] S3 assembly skeleton assembly: the rear bumper trailer beam S made and the internal integrated welded sheet metal bracket S made by welding fixed;

[0020] S4. Install the rear bumper cover: Install the rear bumper cover on the outside of the internal integrated welded sheet metal bracket by penetration welding or bolting, ensuring the rear bumper trailer cross member is positioned inside the cover.

[0021] S5. Plastic Assembly: Weld the plastic parts to both ends of the inner wall of the skin. Attach the left and right rear bumper lower mounting brackets to the corresponding plastic parts with screws.

[0022] S6. Pedal module installation: Insert the pedal module with V-shaped clips into the top of the skin, so that the clips match the slots of the guard plate assembly.

[0023] Preferably, the beam body in step S1 is formed by bending a hollow pipe to form a horizontal portion and an upward inclined portion, and the connecting support portion is welded to the end face of the inclined portion;

[0024] The installation of the connecting portion in step S1 includes sleeve-fitting the square sleeve at the center of the horizontal portion and performing circumferential wrapping welding through the wrapping portion.

[0025] Preferably, step S6 specifically includes:

[0026] Pre-positioning is achieved through the positioning columns and the positioning holes of the guard plate assembly. Vertical pressure is applied to form an interference fit between the V-shaped buckle and the slot, and anti-loosening bolts are installed at the bottom of the pedal module.

[0027] After step S2 is completed, an intermediate bracket is symmetrically welded to the inner side of the inner rear bumper lower guard plate, and the intermediate bracket is provided with a mounting plane matching the frame longitudinal beam.

[0028] Preferably, the welding of the plastic part in step S5 adopts an ultrasonic welding process, and after welding, thread locking glue is applied to the threaded hole of the plastic part and then the screws are tightened.

[0029] Compared with related technologies, the rear bumper assembly and processing and assembly method of a pickup truck with a trailer function provided by the present invention have the following beneficial effects:

[0030] Modular design, as an advanced concept, scientifically divides the rear bumper assembly of a car trailer into multiple submodules. The impact-bearing portion is designed as an independent crash module, the area responsible for connecting to the vehicle body is designated as a connection module, and the exterior protection portion comprises an exterior module. Each module is manufactured in a separate production unit to strict high-precision quality standards. During final assembly, pre-designed standardized interfaces allow for rapid assembly of the modules. This process significantly reduces the complex and repetitive adjustments and positioning required in traditional assembly, effectively shortening the assembly cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an exploded schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic structural diagram of the right wing support assembly of the backrest of the present invention;

[0033] Figure 3 This is a schematic structural diagram of the left wing support assembly of the backrest of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the backrest adaptive air bag lumbar support assembly of the present invention.

[0035] 1. Rear bumper trailer crossbeam;

[0036] 2. Beam;

[0037] 3. Connect the support part;

[0038] 4. L-shaped connecting plate;

[0039] 5. Connecting part;

[0040] 6. Internally integrated welded sheet metal bracket;

[0041] 7. Inner rear bumper lower guard plate;

[0042] 8. Outer rear bumper upper guard plate;

[0043] 9. Mounting bracket under the left rear bumper;

[0044] 10. Mounting bracket under the right rear bumper;

[0045] 11. Rear left mounting bracket;

[0046] 12. Rear right mounting bracket;

[0047] 13. Rear bumper skin;

[0048] 14. Plastic parts;

[0049] 15. Pedal module;

[0050] 16. Horizontal part;

[0051] 17. upwardly inclined portion;

[0052] 18. Square sleeve;

[0053] 19. Package Department;

[0054] 20. V-shaped buckle;

[0055] 21. Card slot;

[0056] 22. Positioning column;

[0057] 23. Positioning hole;

[0058] 24. Intermediate bracket;

[0059] 25. Anti-loosening bolts;

[0060] 26. Installation plane;

[0061] 27. Threaded hole;

[0062] 28. Thread anti-loosening glue. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0064] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0065] See also Figures 1-4 The embodiment of the present invention provides a rear bumper assembly for a pickup truck with a trailer function, comprising: a rear bumper trailer cross beam 1, the rear bumper trailer cross beam 1 comprising a beam body 2 and connecting support portions 3 welded and fixed at both ends of the beam body 2, an L-shaped connecting plate 4 being fixed to the connecting support portion 3 by bolts, and a connecting portion 5 being fixed at the center of the beam body 2;

[0066] An internally integrated welded sheet metal bracket 6, the internally integrated welded sheet metal bracket 6 comprising an inner rear bumper lower guard plate 7 and an outer rear bumper upper guard plate 8 welded and fixed to the outer side of the inner rear bumper lower guard plate 7, a left rear bumper lower mounting bracket 9 and a right rear bumper lower mounting bracket 10 being fixed to the inner ends of the outer rear bumper upper guard plate 8, a rear left mounting bracket 11 and a rear right mounting bracket 12 being welded between the left rear bumper lower mounting bracket 9 and the right rear bumper lower mounting bracket 10 and the inner rear bumper lower guard plate 7;

[0067] The rear bumper skin 13 is arranged on the outside of the internal integrated welded sheet metal bracket 6 and is connected to the internal integrated welded sheet metal bracket 6 by puncture welding or bolt fastening. The rear bumper trailer cross beam 1 is arranged on the inside of the rear bumper skin 13, and the internal integrated welded sheet metal bracket 6 is welded and fixedly connected to the rear bumper trailer cross beam 1;

[0068] The plastic part 14 is welded and fixed to both ends of the inner wall of the rear bumper skin 13. The left rear bumper lower mounting bracket 9 and the right rear bumper lower mounting bracket 10 are connected to the plastic part 14 by screws.

[0069] The pedal module 15 is arranged on the top of the internally integrated welded sheet metal bracket 6 , and the pedal module 15 is embedded and installed on the top of the rear bumper skin 13 .

[0070] Preferably, the beam body 2 is hollow, and includes a horizontal portion 16 and upwardly inclined portions 17 provided at both ends of the horizontal portion 16 and connected to the connecting support portion 3 .

[0071] Preferably, the connecting portion 5 includes a square sleeve 18 for connecting to the vehicle frame and a wrapping portion 19 fixed to the top of the square sleeve 18 , and the wrapping portion 19 is wrapped around the outside of the horizontal portion 16 .

[0072] Preferably, a V-shaped buckle 20 is provided on the inner side of the pedal module 15, and a slot 21 is provided on the rear bumper skin 13, the inner rear bumper lower guard plate 7 and the outer rear bumper upper guard plate 8. The V-shaped buckle 20 cooperates with the slot 21 to facilitate the installation and removal of the pedal module 15.

[0073] Preferably, a positioning column 22 is provided on the inner side of the pedal module 15, and a positioning hole 23 that cooperates with the positioning column 22 is provided on the rear bumper skin 13, the inner rear bumper lower guard plate 7 and the outer rear bumper upper guard plate 8, so as to facilitate the positioning of the pedal module 15 and the rear bumper skin 13.

[0074] Preferably, an intermediate bracket 24 for connecting to the vehicle frame is symmetrically welded and fixed to the inner side of the inner rear bumper lower guard plate 7 .

[0075] A method for processing and assembling a rear bumper assembly of a pickup truck with a trailer function is characterized by comprising the following steps:

[0076] S1. Preparation of rear trailer beam 1: The beam body 2 and the connecting support portion 3 are welded and formed, the connecting portion 5 is welded at the center of the beam body 2, and the L-shaped connecting plate 4 is fixed at both ends of the connecting support portion 3 by bolts;

[0077] S2 internal bracket welding: the outer rear bumper upper guard plate 8 is welded to the outer side of the inner rear bumper lower guard plate 7, and the left rear bumper lower mounting bracket 9 and the right rear bumper lower mounting bracket 10 are welded at both ends of the guard plate assembly, and the left mounting bracket 11 and the rear right mounting bracket 12 are welded between each mounting bracket and the inner guard plate;

[0078] S3 assembly skeleton assembly: the rear bumper trailer beam S1 made 1 and the internal integrated welded sheet metal bracket S2 made 6 are welded and fixed;

[0079] S4. Installation of the rear bumper skin 13: The rear bumper skin 13 is installed on the outside of the internal integrated welded sheet metal bracket 6 by puncture welding or bolt fastening, ensuring that the rear bumper trailer crossbeam 1 is located inside the skin;

[0080] S5. Plastic part 14 assembly: Welding the plastic part 14 at both ends of the inner wall of the skin, and connecting the left rear bumper lower mounting bracket 9 and the right rear bumper lower mounting bracket 10 and the corresponding plastic part 14 by screws;

[0081] S6. Install the pedal module 15: embed the pedal module 15 with the V-shaped buckle 20 into the top of the skin so that the buckle fits in the slot 21 of the guard plate assembly.

[0082] Preferably, the beam body 2 in step S1 is formed by bending a hollow tube to form a horizontal portion 16 and an upward inclined portion 17, and the connecting support portion 3 is welded to the end face of the inclined portion 17;

[0083] The installation of the connecting portion 5 in step S1 includes sleeve-fitting the square sleeve 18 on the center of the horizontal portion 16 and performing circumferential wrapping welding through the wrapping portion 19 .

[0084] Preferably, step S6 specifically includes:

[0085] Pre-positioning is achieved by applying vertical pressure through the positioning column 22 and the positioning hole 23 of the guard plate assembly to form an interference fit between the V-shaped buckle 20 and the slot 21, and a locking bolt 25 is installed at the bottom of the pedal module 15;

[0086] After step S2 is completed, an intermediate bracket 24 is symmetrically welded to the inner side of the inner rear bumper lower guard plate 7 . The intermediate bracket 24 is provided with a mounting plane 26 that matches the frame longitudinal beam.

[0087] Preferably, in step S5 , the plastic part 14 is welded using an ultrasonic welding process, and after welding, thread locking glue is applied to the threaded hole 27 of the plastic part 14 and then the screws are tightened.

[0088] The trailer rear bumper assembly of the present invention is mainly composed of modular components such as pedals, rear bumper skin, internal integrated welded sheet metal brackets and trailer crossbeams. The metal and plastic parts work together through a specific connection method to form a stable and efficient load-bearing structure.

[0089] The step is located on the rear bumper and connected to the rear bumper surface via a step. Its surface is often textured to increase the coefficient of friction. Based on the principles of tribology, this effectively improves safety and stability when entering and exiting the vehicle and maneuvering the rear end. From a mechanical perspective, the step's structural design must meet ergonomic requirements, ensuring it will not deform or break excessively when subjected to human weight and dynamic forces, thereby ensuring reliability.

[0090] The rear bumper's surface is typically the same color as the vehicle's body and is painted. While satisfying aesthetic requirements, it also plays a crucial role in aerodynamics and structural mechanics. The specialized styling on either side aims to effectively direct airflow at the rear of the vehicle through optimized geometry. This, according to aerodynamic principles, reduces air resistance during driving and, consequently, fuel consumption. From a structural mechanics perspective, while the rear bumper's surface primarily serves a decorative and aerodynamic purpose, it must work in conjunction with the internal support structure to absorb and disperse some of the impact force in collisions and other conditions, protecting critical rear components.

[0091] An internally integrated welded sheet metal bracket serves as the rear bumper assembly's core support structure, connecting components using welding to form a rigid frame. Its primary function is to provide stable support for the rear bumper's surface and bolt to the trailer's crossbeam, ensuring the structural integrity of the entire rear bumper assembly. Mechanical analysis requires that the material selection and structural design of the sheet metal bracket meet strength and rigidity requirements to withstand the tensile forces of towing, dynamic loads during vehicle operation, and potential collision impacts. Numerical simulation methods such as finite element analysis can optimize the sheet metal bracket's structure, achieving lightweight materials and reducing overall vehicle weight while maintaining mechanical properties.

[0092] The trailer crossbeam is a key component connecting the rear bumper assembly to the vehicle frame, and is tightly connected to the vehicle frame via bolts during assembly. This connection method ensures ease of installation while effectively transferring the tension generated during towing to the frame, ensuring the vehicle's structural stability during towing operations. According to the principles of material mechanics, trailer crossbeams must possess sufficient strength and toughness to withstand the combined stresses of tension, bending, and shear under heavy load conditions. At the same time, the design of the connection parts must consider the preload and shear strength of the bolts to prevent loosening or failure under extreme conditions, ensuring vehicle driving safety.

[0093] Modular design, as an advanced concept, scientifically divides the rear bumper assembly of a car trailer into multiple submodules. The impact-bearing portion is designed as an independent crash module, the area responsible for connecting to the vehicle body is designated as a connection module, and the exterior protection portion comprises an exterior module. Each module is manufactured in a separate production unit to strict high-precision quality standards. During final assembly, pre-designed standardized interfaces allow for rapid assembly of the modules. This process significantly reduces the complex and repetitive adjustments and positioning required in traditional assembly, effectively shortening the assembly cycle.

[0094] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rear bumper assembly for a pickup truck with a trailer function, characterized in that: include: A rear bumper trailer cross beam (1), comprising a beam body (2) and connecting support portions (3) welded to both ends of the beam body (2), an L-shaped connecting plate (4) being fixed to the connecting support portion (3) by bolts, and a connecting portion (5) being fixed at the center of the beam body (2); An internal integrated welded sheet metal bracket (6), the internal integrated welded sheet metal bracket (6) comprising an inner rear bumper lower guard plate (7) and an outer rear bumper upper guard plate (8) welded and fixed to the outer side of the inner rear bumper lower guard plate (7), a left rear bumper lower mounting bracket (9) and a right rear bumper lower mounting bracket (10) being fixed to the inner ends of the outer rear bumper upper guard plate (8), and a rear left mounting bracket (11) and a rear right mounting bracket (12) being welded between the left rear bumper lower mounting bracket (9) and the right rear bumper lower mounting bracket (10) and the inner rear bumper lower guard plate (7); The rear bumper skin (13) is arranged on the outside of the internal integrated welded sheet metal bracket (6) and is connected to the internal integrated welded sheet metal bracket (6) by puncture welding or bolt fastening. The rear bumper trailer cross beam (1) is arranged on the inside of the rear bumper skin (13), and the internal integrated welded sheet metal bracket (6) is welded and fixedly connected to the rear bumper trailer cross beam (1); The plastic part (14) is welded and fixed at both ends of the inner wall of the rear bumper skin (13), and the left rear bumper lower mounting bracket (9) and the right rear bumper lower mounting bracket (10) are connected to the plastic part (14) by screws; The pedal module (15) is arranged on the top of the internally integrated welded sheet metal bracket (6), and the pedal module (15) is embedded and installed on the top of the rear bumper skin (13).

2. The rear bumper assembly of a pickup truck with trailer function according to claim 1, characterized in that: The beam body (2) is hollow and comprises a horizontal portion (16) and upwardly inclined portions (17) arranged at both ends of the horizontal portion (16) and connected to the connecting support portion (3).

3. The rear bumper assembly of a pickup truck with trailer function according to claim 2, characterized in that: The connecting portion (5) comprises a square sleeve (18) for connecting to a vehicle frame and a wrapping portion (19) fixed on the top of the square sleeve (18), and the wrapping portion (19) wraps around the outside of the horizontal portion (16).

4. The rear bumper assembly of a pickup truck with trailer function according to claim 1, characterized in that: A V-shaped buckle (20) is provided on the inner side of the pedal module (15); a clamping groove (21) is provided on the rear bumper surface (13), the inner rear bumper lower guard plate (7), and the outer rear bumper upper guard plate (8); and the V-shaped buckle (20) cooperates with the clamping groove (21).

5. The rear bumper assembly of a pickup truck with trailer function according to claim 4, characterized in that: A positioning column (22) is provided on the inner side of the pedal module (15), and positioning holes (23) that cooperate with the positioning column (22) are provided on the rear bumper surface (13), the inner rear bumper lower guard plate (7), and the outer rear bumper upper guard plate (8).

6. The rear bumper assembly of a pickup truck with trailer function according to claim 1, characterized in that: An intermediate bracket (24) for connecting with the vehicle frame is symmetrically welded and fixed to the inner side of the inner rear bumper lower guard plate (7).

7. An assembly method for manufacturing a rear bumper assembly of a pickup truck with trailer function according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Preparation of rear trailer beam (1): The beam body (2) and the connecting support portion (3) are welded together, a connecting portion (5) is welded at the center of the beam body (2), and an L-shaped connecting plate (4) is fixed at both ends of the connecting support portion (3) by bolts; S2. Internal bracket welding: Weld the outer rear bumper upper guard plate (8) to the outer side of the inner rear bumper lower guard plate (7), weld the left rear bumper lower mounting bracket (9) and the right rear bumper lower mounting bracket (10) at both ends of the guard plate assembly, and weld the rear left mounting bracket (11) and the rear right mounting bracket (12) between each mounting bracket and the inner guard plate; S3 assembly skeleton assembly: the rear bumper trailer beam (1) obtained from S1 and the internal integrated welded sheet metal bracket (6) obtained from S2 are welded and fixed; S4. Installation of the rear bumper skin (13): The rear bumper skin (13) is installed on the outside of the internal integrated welded sheet metal bracket (6) by puncture welding or bolt fastening, ensuring that the rear bumper trailer crossbeam (1) is located on the inside of the skin; S5. Plastic part (14) assembly: Weld the plastic part (14) at both ends of the inner wall of the skin, and connect the left rear bumper lower mounting bracket (9) and the right rear bumper lower mounting bracket (10) with the corresponding plastic part (14) by screws; S6. Pedal module (15) installation: embed the pedal module (15) with the V-shaped buckle (20) into the top of the skin so that the buckle fits in the slot (21) of the guard plate assembly.

8. The processing and assembling method according to claim 7, characterized in that: In step S1, the beam body (2) is formed by bending a hollow tube to form a horizontal portion (16) and an upward inclined portion (17), and the end faces of the connecting support portion (3) and the inclined portion (17) are welded; The installation of the connecting portion (5) in step S1 includes sleeve-fitting the square sleeve (18) at the center of the horizontal portion (16) and performing circumferential wrapping welding through the wrapping portion (19).

9. The processing and assembling method according to claim 7, characterized in that: Step S6 specifically includes: Pre-positioning is achieved by applying vertical pressure through the positioning column (22) and the positioning hole (23) of the guard plate assembly to form an interference fit between the V-shaped buckle (20) and the slot (21), and a locking bolt (25) is installed at the bottom of the pedal module (15); After step S2 is completed, an intermediate bracket (24) is symmetrically welded on the inner side of the inner rear bumper lower guard plate (7), and the intermediate bracket (24) is provided with a mounting plane (26) matching the frame longitudinal beam.

10. The processing and assembling method according to claim 7, characterized in that: In step S5, the plastic part (14) is welded using an ultrasonic welding process. After welding, thread anti-loosening glue is applied to the threaded hole (27) of the plastic part (14) and then the screws are tightened.

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