Automobile rear door crash energy absorption structure

Abstract

This utility model discloses a collision energy-absorbing structure for a car rear door, comprising an inner door panel composed of an inner panel and a side panel. Multiple reinforcing ribs are circumferentially arranged at the connection between the inner panel and the side panel. One side of each reinforcing rib has an inner groove containing multiple rib plates. The inner groove effectively reduces material usage, while the internal rib plates, through a scientifically designed force transmission path, ensure the overall rigidity and collision energy absorption performance of the structure. This composite reinforcement structure not only meets the design requirements for lightweight vehicles but also effectively absorbs impact energy through the deformation of the reinforcing ribs during a side collision, providing better safety protection for occupants.

Description

Technical Field

[0001] This utility model relates to the field of automotive rear door technology, and in particular to a collision energy absorption structure for automotive rear doors. Background Technology

[0002] In the field of automotive passive safety, the door structure is a key component of side-impact protection, and its design directly affects the integrity of the passenger compartment and the safety of the occupants. The rear doors, in particular, are subject to more complex side-impact scenarios (such as pole impacts, moving barrier impacts, and angled impacts), placing higher demands on the energy absorption capacity and force transmission path optimization of the door structure.

[0003] Currently, traditional car door energy-absorbing structures mainly use high-strength steel or aluminum alloy materials, increasing rigidity by increasing material thickness or adding reinforcing ribs. However, this design has problems such as heavy weight, which is not conducive to lightweighting, insufficient energy absorption efficiency, and suboptimal force transmission path. To address these issues, some existing technologies attempt to use honeycomb structures or foam filling materials inside car doors to improve energy absorption efficiency. However, these solutions often lead to complex manufacturing processes, increased costs, and difficulty in balancing rigidity and lightweight requirements. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a collision energy absorption structure for the rear door of an automobile, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a collision energy absorption structure for a car rear door, comprising an inner door panel composed of an inner panel and a side panel, wherein multiple reinforcing ribs are provided circumferentially at the connection between the inner panel and the side panel, and an inner groove is provided on one side of the reinforcing rib, and multiple rib plates are provided in the inner groove.

[0006] Furthermore, the inner panel has a storage cavity on the side corresponding to the vehicle cabin, and a protrusion integrally formed with the inner panel is provided in the middle of the storage cavity.

[0007] Furthermore, the inner panel facing the outer door panel has a groove that matches the shape of the protrusion.

[0008] Furthermore, the back of the storage cavity is parallel to the end face of the side panel.

[0009] Furthermore, an auxiliary rib is provided between the bottom of the back of the storage cavity and the adjacent reinforcing rib.

[0010] Furthermore, a snap fastener is installed on the end face of the reinforcing rib.

[0011] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the inner groove effectively reduces material usage, while the internal ribs, through a scientific force transmission path design, ensure the overall rigidity of the structure and its collision energy absorption performance. This composite reinforcement structure not only meets the design requirements for lightweight automobiles but also effectively absorbs impact energy through the deformation of the reinforcing ribs when the vehicle encounters a side collision, providing better safety protection for occupants.

[0012] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a perspective view of Embodiment 1 of this utility model.

[0014] Figure 2 This is a rear view of the inner panel of Embodiment 1 of this utility model.

[0015] Explanation of reference numerals in the attached diagram: Inner panel 10, storage cavity 11, protrusion 12, groove 121; Side panel 20; 30. Reinforcing rib, 31. Inner groove, 32. Rib plate, 33. Auxiliary rib, 34. Snap fastener. Detailed Implementation

[0016] Please refer to Figure 1-2 As shown, this illustrates the specific structure of a preferred first embodiment of the present invention, which is a rear door collision energy-absorbing structure for automobiles. It includes an inner door panel composed of an inner panel 10 and a side panel 20. Multiple reinforcing ribs 30 are circumferentially arranged at the connection between the inner panel 10 and the side panel 20. One side of each reinforcing rib 30 has an inner groove 31, and multiple rib plates 32 are arranged within the inner groove 31. The inner groove 31 effectively reduces material usage, while the internally arranged rib plates 32, through a scientifically designed force transmission path, ensure the overall rigidity and collision energy absorption performance of the structure. This composite reinforcement structure not only meets the design requirements for lightweight automobiles but also effectively absorbs impact energy through the deformation of the reinforcing ribs 30 during a side collision, providing better safety protection for occupants.

[0017] For example, the inner panel 10 has a storage cavity 11 on the side corresponding to the vehicle compartment, and a protrusion 12 integrally formed with the inner panel 10 is provided in the middle of the storage cavity 11. The protrusion 12 in the storage cavity 11 forms a "cavity-in-protrusion" composite structure, so that the inner panel 10 as a whole forms multiple precisely calculated buffer opening structures. These buffer openings can effectively absorb impact energy through orderly plastic deformation when a collision occurs. At the same time, the presence of the protrusion 12 ensures that the structure can still maintain the necessary support stiffness during deformation.

[0018] For example, the inner panel 10 has a groove 121 on the side facing the outer door panel that matches the shape of the protrusion 12. The groove 121, together with the storage cavity 11 and the protrusion 12, constitutes a multi-level buffer structure, which can deform in stages during a collision, absorb energy step by step, and improve energy absorption efficiency.

[0019] The back of the storage cavity 11 is parallel to the end face of the side panel 20.

[0020] For example, an auxiliary rib 33 is provided between the bottom of the back of the storage cavity 11 and the adjacent reinforcing rib 30. The auxiliary rib 33 strengthens the force transmission path between the storage cavity 11 and the reinforcing rib 30, and can more effectively disperse the impact load during a collision.

[0021] A snap fastener 34 is installed on the end face of the reinforcing rib 30.

[0022] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A collision energy-absorbing structure for a car rear door, comprising an inner door panel composed of an inner panel (10) and a side panel (20), characterized in that: The inner plate (10) and the side plate (20) are provided with a plurality of reinforcing ribs (30) in the circumferential direction at the connection. One side of the reinforcing rib (30) is provided with an inner groove (31), and a plurality of rib plates (32) are provided in the inner groove (31).

2. The collision energy absorption structure for a car rear door according to claim 1, characterized in that: The inner panel (10) has a storage cavity (11) on the side corresponding to the vehicle compartment, and the storage cavity (11) has a protrusion (12) integrally formed with the inner panel (10) in the middle.

3. The collision energy absorption structure for a car rear door according to claim 2, characterized in that: The inner panel (10) has a groove (121) on the side facing the outer door panel that matches the shape of the protrusion (12).

4. The collision energy absorption structure for a car rear door according to claim 2, characterized in that: The back of the storage cavity (11) is parallel to the end face of the side panel (20).

5. The collision energy absorption structure for a car rear door according to claim 2, characterized in that: An auxiliary rib (33) is provided between the bottom back of the storage cavity (11) and the adjacent reinforcing rib (30).

6. The collision energy absorption structure for a car rear door according to claim 1, characterized in that: The end face of the reinforcing rib (30) is fitted with a buckle (34).

Images