Automobile rear floor longitudinal beam supporting plate
By designing a longitudinal beam support plate for the rear floor of a car, and adopting an integrated structure consisting of longitudinal beams, support plates, positioning blocks, extensions, and reinforcing plates, the problems of traditional longitudinal beams being undurable and lacking strength are solved, thereby improving the collision safety performance of the vehicle body and the convenience of installation and maintenance.
Patent Information
- Application Number
- CN202520806632.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-27
AI Technical Summary
Traditional car rear floor longitudinal beams are not durable and cannot withstand strong impacts. They also result in insufficient body strength, easy deformation, and compromised collision safety performance.
A longitudinal beam support plate for the rear floor of an automobile has been designed, comprising components such as longitudinal beams, support plates, positioning blocks, extensions, reinforcing plates, and guardrails. These components are connected by bolts and welding to form an integral structure to improve strength and facilitate installation and maintenance.
It enhances the overall strength of the rear floor of the car, effectively absorbs collision energy, protects passengers, and is easy to install and maintain.
Smart Images

Figure CN223962186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive rear floor technology, and in particular to a longitudinal beam support plate for automotive rear floor. Background Technology
[0002] The rear floor longitudinal beams of a car primarily support the rear passengers and house the rear suspension and exhaust pipes. Furthermore, they withstand the loads, vibrations, impacts, and torques generated during vehicle movement, making them a crucial component for ensuring rear-end collision safety. Therefore, the rear floor longitudinal beams must possess sufficient structural strength.
[0003] Traditional car rear floors are generally not durable and cannot withstand strong impacts. In the event of a collision, the vehicle's floor is only a thin steel plate, which has relatively weak torsional resistance and insufficient body strength, making it more prone to deformation. Utility Model Content
[0004] The purpose of this utility model is to provide a longitudinal beam support plate for the rear floor of an automobile, which solves the problems mentioned above.
[0005] To achieve the above objectives, a rear floor longitudinal beam support plate for automobiles is provided, comprising a longitudinal beam, a support plate provided between the two longitudinal beams, a positioning block welded to the support plate, and a rear wheel arch assembly bolted to the positioning block; an extension portion is provided on the rear side of the longitudinal beam, the extension portion is integrally formed with the longitudinal beam and bends inward, a second guardrail is provided at the rear end of the extension portion, a reinforcing plate is provided on the upper side of the support plate, the reinforcing plate is generally arc-shaped and one end is welded to the support plate, grooves are provided on the front and rear sides of the reinforcing plate, and a first guardrail is provided at the rear end.
[0006] According to the aforementioned automobile rear floor longitudinal beam support plate, both the reinforcing plate and the rear end of the extension are provided with mounting blocks, and the mounting blocks are provided with several threaded holes.
[0007] According to the aforementioned automobile rear floor longitudinal beam support plate, a connecting rod is welded to one side of both the first guardrail and the second guardrail. The connecting rod is slidably connected to the mounting block and is fixedly connected to the mounting block by bolts.
[0008] According to the aforementioned automobile rear floor longitudinal beam support plate, the left end of the rear wheel cover assembly is provided with a connecting plate and a positioning opening, and the right end is provided with a connecting hook. The connecting plate, the connecting hook and the rear wheel cover assembly are integrally cast.
[0009] According to the aforementioned automobile rear floor longitudinal beam support plate, the positioning opening is adapted to the positioning block, and the connecting plate is provided with threaded holes.
[0010] According to the aforementioned automobile rear floor longitudinal beam support plate, the connecting hook is located on the lower side of the mounting block and is adapted to the size of the mounting block, and the connecting hook is fixed to the mounting block by bolts.
[0011] According to the aforementioned automobile rear floor longitudinal beam support plate, the grooves on both sides are both curved inward.
[0012] This utility model has the following beneficial effects:
[0013] 1. Compared with the existing technology, by setting a positioning block on the support plate, fixing the rear wheel cover assembly to the support plate through the connecting plate and the positioning opening, and then fixing the connecting hook to the mounting block with bolts, it is easier to install and maintain later.
[0014] 2. Compared with the existing technology, by making the longitudinal beam and the extension part into one piece, the overall strength of the rear floor is improved. At the same time, the first guardrail and the second guardrail are respectively provided on the reinforcing plate and the extension part. The two guardrails further enhance the overall strength of the rear floor. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0016] Figure 1 This is a structural diagram of a longitudinal beam support plate for the rear floor of an automobile according to the present invention.
[0017] Figure 2 This is a partial structural diagram of a longitudinal beam support plate for the rear floor of an automobile according to the present invention.
[0018] Figure 3 This is a structural diagram of the rear wheel arch assembly of the longitudinal beam support plate for the rear floor of an automobile according to the present invention;
[0019] Figure 4 This is a structural diagram of a protective railing for a longitudinal beam support plate of the rear floor of an automobile, according to the present invention.
[0020] Figure 5 This is a rear view of the rear wheel arch assembly of the longitudinal beam support plate for the rear floor of an automobile according to the present invention.
[0021] Legend:
[0022] 1. Longitudinal beam; 11. Extension section; 2. Support plate; 21. Positioning block; 3. Rear wheel arch assembly; 31. Connecting plate; 32. Positioning opening; 33. Connecting hook; 4. Reinforcing plate; 41. Mounting block; 42. Groove; 5. First guardrail; 6. Second guardrail; 7. Connecting rod. Detailed Implementation
[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0024] Reference Figure 1-5 This utility model provides a rear floor longitudinal beam support plate for automobiles, which includes a longitudinal beam 1, a support plate 2 between the two longitudinal beams 1, a positioning block 21 welded on the support plate 2, and a rear wheel cover assembly 3 installed on the positioning block 21 by bolts.
[0025] An extension 11 is provided on the rear side of the longitudinal beam 1. The extension 11 is integrally set with the longitudinal beam 1 and bends inward to improve the overall strength of the rear floor. At the same time, if the protective plate is involved in a collision, the bending part between the longitudinal beam 1 and the extension 11 can absorb more energy, thereby protecting the passengers. A second protective railing 6 is provided at the rear end of the extension 11. A reinforcing plate 4 is provided on the upper side of the support plate 2. The reinforcing plate 4 is arc-shaped and one end is welded to the support plate 2. The front and rear sides of the reinforcing plate 4 are provided with grooves 42, and the rear end is provided with a first protective railing 5. Both sides of the grooves 42 are arc-shaped and bend inward. The grooves 42 are used to install the rear wheel arch assembly 3. The rear ends of the reinforcing plate 4 and the extension 11 are provided with mounting blocks 41. The mounting blocks 41 are provided with several threaded holes. The first protective railing 5 and the second protective railing 6 are fixedly connected to the reinforcing plate 4 and the extension 11 by bolts. If the protective railing is damaged due to a collision, it can be directly removed by bolts for easy replacement and maintenance.
[0026] Connecting rods 7 are welded to one side of both the first guardrail 5 and the second guardrail 6. The connecting rods 7 are slidably connected to the mounting block 41 and are fixedly connected to the mounting block 41 by bolts. The left end of the rear wheel arch assembly 3 is provided with a connecting plate 31 and a positioning opening 32, and the right end is provided with a connecting hook 33. The connecting plate 31, the connecting hook 33 and the rear wheel arch assembly 3 are integrally cast. The positioning opening 32 is adapted to the positioning block 21. The connecting plate 31 is provided with a threaded hole. The connecting hook 33 is located on the lower side of the mounting block 41 and is adapted to the size of the mounting block 41. The connecting hook 33 is fixed to the mounting block 41 by bolts. During installation, the connecting hook 33 is fixedly connected to the mounting block 41 by bolts, which facilitates installation and subsequent maintenance.
[0027] Working principle: During installation, the rear wheel cover assembly 3 is fixed to the support plate 2 through the connecting plate 31 and the positioning opening 32, and then the connecting hook 33 is fixed to the mounting block 41 with bolts, which facilitates installation and subsequent maintenance.
[0028] During use, by integrating the longitudinal beam 1 with the extension 11, the overall strength of the rear floor is improved. At the same time, the reinforcing plate 4 and the extension 11 are respectively provided with a first guardrail 5 and a second guardrail 6, which further enhance the overall strength of the rear floor.
[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A longitudinal beam support plate for the rear floor of an automobile, characterized in that, Includes a longitudinal beam (1), a support plate (2) is provided between the two longitudinal beams (1), a positioning block (21) is welded on the support plate (2), and a rear wheel cover assembly (3) is installed on the positioning block (21) by bolts; The longitudinal beam (1) is provided with an extension (11) on the rear side. The extension (11) is integrally formed with the longitudinal beam (1) and bends inward. The rear end of the extension (11) is provided with a second guardrail (6). The upper side of the support plate (2) is provided with a reinforcing plate (4). The reinforcing plate (4) is arc-shaped and one end is welded to the support plate (2). The front and rear sides of the reinforcing plate (4) are provided with grooves (42), and the rear end is provided with a first guardrail (5).
2. The automotive rear floor longitudinal beam support plate according to claim 1, characterized in that, The rear ends of the reinforcing plate (4) and the extension (11) are both provided with mounting blocks (41), and the mounting blocks (41) are provided with several threaded holes.
3. The automotive rear floor longitudinal beam support plate according to claim 2, characterized in that, The first guardrail (5) and the second guardrail (6) are each welded with a connecting rod (7) on one side. The connecting rod (7) is slidably connected to the mounting block (41) and is fixedly connected to the mounting block (41) by bolts.
4. The automotive rear floor longitudinal beam support plate according to claim 3, characterized in that, The rear wheel cover assembly (3) has a connecting plate (31) and a positioning opening (32) on the left end, and a connecting hook (33) on the right end. The connecting plate (31), the connecting hook (33) and the rear wheel cover assembly (3) are cast as a whole.
5. A longitudinal beam support plate for the rear floor of an automobile according to claim 4, characterized in that, The positioning opening (32) is adapted to the positioning block (21), and the connecting plate (31) is provided with a threaded hole.
6. A longitudinal beam support plate for the rear floor of an automobile according to claim 5, characterized in that, The connecting hook (33) is located on the underside of the mounting block (41) and is adapted to the size of the mounting block (41). The connecting hook (33) and the mounting block (41) are fixed together by bolts.
7. A longitudinal beam support plate for the rear floor of an automobile according to claim 6, characterized in that, Both sides of the groove (42) are curved inward.