Lower fender for a rear door of a vehicle

Abstract

The utility model provides a lower baffle for automobile back door, including back door lower baffle, handle installation area, lower baffle reinforcing guard, connecting roof, window baffle and window, wherein: handle installation area is set up in the back of back door lower baffle, and lower baffle reinforcing guard fixed mounting is installed on the inner wall of back door lower baffle, and the connecting roof fixed mounting is installed on the top of back door lower baffle, the window baffle fixed mounting is installed on the top of connecting roof, and the window is set up in the inside of window baffle, the utility model discloses back door lower baffle and the setting of lower baffle reinforcing guard, and the protection ability is strong, and the external force ability is high.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a lower guard plate for automotive rear doors. Background Technology

[0002] A rear door underbody protector is a protective component installed at the bottom of the rear door of a car, primarily serving to protect the internal structure of the door and enhance the overall aesthetics of the vehicle. It is typically made of engineering plastics or metal composite materials, offering scratch resistance, corrosion resistance, and protection against stone impacts, while effectively preventing rainwater and mud from entering the door. This protector is fixed to the door frame with clips or bolts. Some high-end models also integrate aerodynamic designs to optimize performance. Its surface texture and shape often coordinate with the overall vehicle exterior style, balancing practicality with visual appeal. However, existing rear door underbody protectors still suffer from poor protective capabilities and low resistance to external forces.

[0003] Therefore, it is essential to invent a lower guard plate for the rear door of a car. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a rear door lower guard plate for automobiles, solving the issues of poor protective capabilities and low resistance to external forces still present in existing rear door lower guard plates. A rear door lower guard plate for automobiles includes a rear door lower guard plate, a handle mounting area, a lower guard plate reinforcement plate, a connecting top plate, a window guard plate, and a window. The handle mounting area is located at the rear center of the rear door lower guard plate, and the lower guard plate reinforcement plate is fixedly installed on the inner wall of the rear door lower guard plate. The connecting top plate is fixedly installed on the top of the rear door lower guard plate. The window guard plate is fixedly installed on the top of the connecting top plate, and the window is located inside the window guard plate.

[0005] The rear door lower guard plate includes an inner guard plate, an outer guard plate, a self-compensating base plate, and an intermediate support pad. The self-compensating base plate is fixedly installed on the inner wall of the inner guard plate and the outer guard plate, respectively. The intermediate support pad is installed between two sets of self-compensating base plates on the inner wall of the inner guard plate and the outer guard plate.

[0006] The inner and outer panels of the rear door lower panel are connected to form a hollow aluminum alloy metal structure. The self-compensating base plate uses two flexible rubber pads, and the intermediate support pad uses one rigid rubber pad. The self-compensating base plate can deform according to the thermal expansion and contraction of the inner and outer panels. Both the self-compensating base plate and the intermediate support pad can deform under pressure from the inner and outer panels.

[0007] The lower guard plate reinforcement plate uses multiple sets of aluminum metal supports with a "T" cross section, and the lower guard plate reinforcement plate conforms to the curvature of the inner wall of the rear door lower guard plate, and is connected to the rear door lower guard plate as a whole by welding; the connection position between the lower guard plate reinforcement plate and the rear door lower guard plate is sealed with a rubber strip.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The rear door lower guard plate of this utility model features an inner and outer guard plate made of aluminum alloy, forming a lightweight hollow frame. Combined with a flexible self-compensating substrate and a rigid intermediate support pad, it forms a three-level buffer system that can absorb thermal deformation and mechanical impact. The lower guard plate is reinforced by welding to improve its bending stiffness, and it forms an integral load-bearing structure by connecting the top plate and the window guard plate. The surface integrates an ergonomic handle mounting area and a high-transmittance window, achieving scratch resistance, wear resistance, sealing and noise reduction while taking into account both operational convenience and visual safety.

[0010] The reinforcing lower guard plate of this utility model serves as the core reinforcement component of the rear door lower guard plate. It is made of T-shaped aviation aluminum material and is laser-welded to the inner wall of the guard plate to form an integrated structure. It mainly performs three functions: First, it acts as a mechanical skeleton to significantly improve the overall impact resistance and effectively disperse driving vibration loads; second, it forms a three-level buffer system with the self-compensating substrate and intermediate support pad to synergistically absorb mechanical stress; and finally, it achieves dustproof and waterproof sealing through rubber sealing strips. Its lightweight design optimizes the vehicle's energy consumption while ensuring protective performance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the back structure of this utility model.

[0013] Figure 3 This is a structural schematic diagram of the rear door lower guard plate of this utility model.

[0014] In the picture:

[0015] 1. Rear door lower guard plate, 11. Inner guard plate, 12. Outer guard plate, 13. Self-compensating base plate, 14. Intermediate support pad, 2. Handle mounting area, 3. Lower guard plate reinforcement guard plate, 4. Connecting top plate, 5. Window guard plate, 6. Window. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 should fall within the protection scope of the present invention.

[0017] As attached Figure 1 To be continued Figure 3 As shown.

[0018] This utility model provides a rear door lower guard plate for automobiles, including a rear door lower guard plate 1, a handle mounting area 2, a lower guard plate reinforcement plate 3, a connecting top plate 4, a window guard plate 5, and a window 6. The handle mounting area 2 is located at the middle and rear of the rear door lower guard plate 1, and the lower guard plate reinforcement plate 3 is fixedly installed on the inner wall of the rear door lower guard plate 1. The connecting top plate 4 is fixedly installed on the top of the rear door lower guard plate 1. The window guard plate 5 is fixedly installed on the top of the connecting top plate 4, and the window 6 is located inside the window guard plate 5.

[0019] The rear door lower guard plate 1 includes an inner guard plate 11, an outer guard plate 12, a self-compensating base plate 13, and an intermediate support pad 14. The self-compensating base plates 13 are respectively fixedly installed on the inner walls of the inner guard plate 11 and the outer guard plate 12. The intermediate support pad 14 is installed between two sets of self-compensating base plates 13 on the inner walls of the inner guard plate 11 and the outer guard plate 12.

[0020] The inner panel 11 and outer panel 12 inside the rear door lower panel 1 are connected at their outer edges to form a hollow aluminum alloy metal structure. The self-compensating base plate 13 uses two flexible rubber pads, and the intermediate support pad 14 uses one rigid rubber pad. The self-compensating base plate 13 can deform according to the thermal expansion and contraction of the inner panel 11 and outer panel 12. Both the self-compensating base plate 13 and the intermediate support pad 14 can deform under pressure from the inner panel 11 and outer panel 12.

[0021] The lower guard plate reinforcement plate 3 uses multiple sets of aluminum metal supports with a "T" cross section, and the lower guard plate reinforcement plate 3 fits the curvature of the inner wall of the rear door lower guard plate 1, and is connected to the rear door lower guard plate 1 as a whole by welding; the connection position between the lower guard plate reinforcement plate 3 and the rear door lower guard plate 1 is sealed by a rubber strip.

[0022] This system achieves comprehensive protection through the coordinated action of multiple components. The rear door lower guard plate 1 serves as the main protective structure, consisting of an inner guard plate 11 and an outer guard plate 12 forming a hollow aluminum alloy frame. This, along with the T-shaped support frame of the lower guard plate reinforcement guard plate 3, forms a rigid protective layer. The three-stage buffer system effectively absorbs thermal deformation and mechanical impact. The connecting top plate 4 integrates the window guard plate 5 and the window 6, while the handle mounting area 2 optimizes the human-machine interface experience.

[0023] The system employs an aluminum alloy and rubber composite design, maintaining stability in environments ranging from -40℃ to 80℃. Laser welding ensures seamless connections between components, and rubber sealing strips provide an IP54 protection rating. Through lightweight construction and mechanical optimization, it achieves a balance between protection, durability, and ease of operation, showcasing the integrated design philosophy of modern automotive components.

[0024] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A lower guard plate for a car rear door, characterized in that: It includes a rear door lower guard plate (1), a handle mounting area (2), a lower guard plate reinforcement guard plate (3), a connecting top plate (4), a window guard plate (5), and a window (6), wherein: the handle mounting area (2) is located in the middle and rear of the rear door lower guard plate (1), and the lower guard plate reinforcement guard plate (3) is fixedly installed on the inner wall of the rear door lower guard plate (1), and the connecting top plate (4) is fixedly installed on the top of the rear door lower guard plate (1); the window guard plate (5) is fixedly installed on the top of the connecting top plate (4), and the window (6) is located inside the window guard plate (5).

2. The lower guard plate for a car rear door as described in claim 1, characterized in that: The rear door lower guard plate (1) includes an inner guard plate (11), an outer guard plate (12), a self-compensating substrate (13), and an intermediate support pad (14), and the self-compensating substrate (13) is fixedly installed on the inner wall of the inner guard plate (11) and the outer guard plate (12); the intermediate support pad (14) is installed between two sets of self-compensating substrates (13) on the inner wall of the inner guard plate (11) and the outer guard plate (12).

3. A lower guard plate for a car rear door as described in claim 2, characterized in that: The inner panel (11) and outer panel (12) inside the rear door lower panel (1) are connected at their outer edges to form a hollow aluminum alloy metal structure. The self-compensating substrate (13) uses two flexible rubber pads, and the intermediate support pad (14) uses one rigid rubber pad. The self-compensating substrate (13) can deform according to the thermal expansion and contraction of the inner panel (11) and outer panel (12). Both the self-compensating substrate (13) and the intermediate support pad (14) can deform under pressure from the inner panel (11) and outer panel (12).

4. A lower guard plate for a car rear door as described in claim 1, characterized in that: The lower guard plate reinforcement plate (3) adopts multiple sets of aluminum metal supports with a "T" cross section, and the lower guard plate reinforcement plate (3) fits the curvature of the inner wall of the rear door lower guard plate (1) and is connected to the rear door lower guard plate (1) as a whole by welding; the connection position between the lower guard plate reinforcement plate (3) and the rear door lower guard plate (1) is sealed by a rubber strip.

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