Automobile backrest framework structure

Abstract

The utility model discloses an automobile backrest framework structure which comprises side plate frameworks which are oppositely arranged, a chassis framework is arranged at the lower ends of the side plate frameworks, a U-shaped pipe is arranged between the upper ends of the side plate frameworks, each side plate framework comprises a side plate body, the width of each side plate body is gradually increased from top to bottom, and the U-shaped pipe is arranged between the upper ends of the side plate frameworks. A connecting part is arranged at the lower end of the side plate body, a groove which is sunken towards the inner side is formed in the middle of the side plate body, and the bottom of the groove extends along the connecting part and forms a turnover extending part; a plurality of first reinforcing ribs are arranged on the two sides of the groove, and the first reinforcing ribs are arranged in a sunken mode from outside to inside. The utility model can solve the problems of insufficient flexural rigidity, concentrated stress, heavy weight and high cost due to the fact that the existing backrest framework structure is formed by welding pipes and plates.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, specifically to an automotive backrest frame structure. Background Technology

[0002] The car seat frame is the core load-bearing component of a car seat, and its strength and safety directly affect the comfort and safety of the occupants. As the main load-bearing structure, the backrest frame of the front seats is crucial to the overall performance of the seat. Especially in the event of a collision, the backrest frame needs to withstand enormous impact forces to prevent occupant injury and ensure the integrity of the seat.

[0003] Traditional automotive backrest frames are typically constructed by welding tubing and sheet metal. While this structural method is technologically mature, it suffers from insufficient bending stiffness, making it prone to bending deformation and resulting in a decrease in the overall rigidity of the backrest frame. To compensate for these strength and stiffness deficiencies, traditional structures often require increasing the sheet metal thickness or welding multiple reinforcing plates, which increases the weight of the backrest frame and hinders lightweight automotive design. Therefore, developing a new automotive backrest frame structure to address these issues is of significant practical importance. Utility Model Content

[0004] This utility model provides a car backrest frame structure that can solve the problems of insufficient bending stiffness, stress concentration, heavy weight, and high cost of existing backrest frame structures made of welded tubular and sheet materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a car backrest frame structure, including opposing side panel frames, a chassis frame at the lower end of the side panel frames, and a U-shaped tube between the upper ends of the side panel frames. The side panel frame includes a side panel body, the width of which gradually increases from top to bottom. A connecting portion is provided at the lower end of the side panel body, and an inwardly recessed groove is provided in the middle of the side panel body. The bottom of the groove extends along the connecting portion to form a folded extension. Multiple first reinforcing ribs are provided on both sides of the groove, and the first reinforcing ribs are recessed from the outside to the inside. The wider bottom of the side panel body improves the overall stability of the side panel frame and its ability to support the back of the user. The folded extension and the groove improve the bending stiffness of the side panel frame and increase the structural strength. The first reinforcing ribs increase the connection strength between the groove and the side panel body.

[0006] As a supplement to the technical solution described in this utility model, the front and rear sides of the side plate body are provided with an inwardly folded first flange and a second flange, and an insertion opening is formed at the top. The lower end of the U-shaped tube can be inserted into the insertion opening and welded and fixed. The insertion opening is used to position the U-shaped tube and connect and fix it.

[0007] As a supplement to the technical solution described in this utility model, the first flange is provided with flange reinforcing ribs arranged along the arc surface, and the edge of the first flange is folded backward to form a third flange. The third flange and the flange reinforcing ribs improve the strength of the first flange and prevent deformation.

[0008] As a supplement to the technical solution described in this utility model, the second flange is provided with a plurality of mounting holes, and the edge of the second flange is folded backward to form a fourth flange. The mounting holes are used to install the backrest spring. The fourth flange further enhances the structural stability of the second flange and avoids deformation.

[0009] As a supplement to the technical solution described in this utility model, a first recessed pit is provided on the rear side of the chassis frame. The first recessed pit is rectangular. Two long strip-shaped second reinforcing ribs are provided on the lower side of the chassis frame. An open-circuit curved surface is provided in the middle of the front side of the chassis frame. The first recessed pit and the second reinforcing ribs increase the strength of the chassis frame. The open-circuit curved surface can ensure structural strength and avoid interference between the backrest frame and the bottom seat cushion frame when the backrest frame is adjusted.

[0010] As a supplement to the technical solution described in this utility model, both ends of the chassis frame are integrally formed with overlapping edges. The inner sidewalls of the overlapping edges are closely fitted to the outer sidewalls of the first flange and the second flange and fixed by welding, resulting in good connection strength.

[0011] As a supplement to the technical solution described in this utility model, a third reinforcing rib is provided on the overlapping edge of the rear side of the chassis frame, which improves the structural stability of the overlapping edge and avoids deformation.

[0012] As a supplement to the technical solution described in this utility model, the upper end of the side plate body is provided with two rectangular recesses, and the upper end of the first flange is provided with a rectangular recess. The rectangular recesses are provided with openings for welding. The structural strength of the butt joint is improved by providing rectangular recesses, and the openings facilitate rapid welding.

[0013] As a supplement to the technical solution described in this utility model, two concave portions are arranged side by side at the upper middle part of the U-shaped tube, and the concave portions are used to install the headrest connector.

[0014] As a supplement to the technical solution described in this utility model, the two ends of the chassis frame are provided with arc-shaped ribs on both sides of the second reinforcing rib. The arc-shaped ribs are arranged along the arc-shaped outer side wall of the chassis frame. The addition of arc-shaped ribs is used to improve the overall structural strength of the chassis frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The gradual width design of the side panel, the folded extension, the reinforcing ribs, and the flanges significantly improve bending stiffness, thus enhancing the structure's strength, rigidity, and stability. This provides better support, and the rectangular concave inner wall forms a positioning surface, facilitating the positioning and welding of the U-shaped tubes. This design addresses the problems of insufficient bending stiffness, stress concentration, heavy weight, and high cost inherent in existing backrest frame structures made of welded tubing and sheet metal. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 These are three-dimensional structural diagrams of the present invention from different angles;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the side plate frame of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the side plate frame at different angles of this utility model;

[0022] Figure 6 This is a cross-sectional schematic diagram of the side plate frame of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the first flange of this utility model;

[0024] Figure 8 This is a three-dimensional structural diagram of the chassis frame of this utility model;

[0025] Figure 9 This is a three-dimensional structural diagram of the chassis frame of this utility model from different angles;

[0026] Figure 10 This is a schematic diagram of the installation structure of the U-shaped tube and side plate frame of this utility model.

[0027] Figure label:

[0028] 1. Side panel frame; 11. Side panel body; 12. Connecting part; 13. Groove; 14. First flange; 141. Flanged reinforcing rib; 142. Third flange; 15. Second flange; 151. Fourth flange; 152. Mounting hole; 16. Insertion opening; 17. First reinforcing rib; 18. Folded extension; 2. Chassis frame; 21. First recess; 22. Second reinforcing rib; 23. Overlapping edge; 24. Arc-shaped convex rib; 25. Clearance curved surface; 27. Third reinforcing rib; 3. U-shaped tube; 31. Concave part; 4. Rectangular concave part; 41. Opening. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] The embodiments of this utility model relate to a car backrest frame structure, such as... Figure 1-10 As shown, the device includes a side panel frame 1 arranged opposite to each other. A chassis frame 2 is provided at the lower end of the side panel frame 1. A U-shaped tube 3 is provided between the upper ends of the side panel frame 1. Two concave portions 31 are arranged side by side at the middle of the upper end of the U-shaped tube 3. The concave portions 31 are used to install the headrest insertion frame. The side panel frame 1 includes a side panel body 11. The width of the side panel body 11 gradually increases from top to bottom. A connecting portion 12 is provided at the lower end of the side panel body 11. A groove 1 that is recessed inward is provided in the middle of the side panel body 11. 3. The bottom of the groove 13 extends along the connecting part 12 to form a folded extension 18; multiple first reinforcing ribs 17 are provided on both sides of the groove 13, and the first reinforcing ribs 17 are recessed from the outside to the inside. The bottom width of the side plate body 11 is designed to be wider, which is good for the overall stability of the side plate frame 1 and the ability to support the back of the human body. The folded extension 18 and the groove 13 improve the bending stiffness of the side plate frame 1 and improve the strength of the structure. The first reinforcing ribs 17 increase the connection strength between the groove 13 and the side plate body 11.

[0031] In this embodiment, as Figure 5 and Figure 7 As shown, the front and rear sides of the side plate body 11 are provided with an inwardly folded first flange 14 and a second flange 15, and an insertion opening 16 is formed at the top. The lower end of the U-shaped tube 3 can be inserted into the insertion opening 16 and welded and fixed. The insertion opening 16 is used to position the U-shaped tube 3 and connect and fix it.

[0032] In this embodiment, as Figure 6-7 As shown, the first flange 14 is provided with flange reinforcing ribs 141 arranged along the arc surface. The edge of the first flange 14 is folded backward to form a third flange 142. The third flange 142 and flange reinforcing ribs 141 improve the strength of the first flange 14 and prevent deformation.

[0033] In this embodiment, as Figure 5-6 As shown, the second flange 15 is provided with a plurality of mounting holes 152. The edge of the second flange 15 is folded backward to form a fourth flange 151. The cross-section of the fourth flange 151 is C-shaped. The mounting holes 152 are used to install the backrest spring. The fourth flange 151 further enhances the structural stability of the second flange 15 and avoids deformation.

[0034] In this embodiment, as Figure 8-9 As shown, the chassis frame 2 has a first recess 21 that is recessed forward on the rear side. The first recess 21 is rectangular. The chassis frame 2 has two long strip-shaped second reinforcing ribs 22 on the lower side. The chassis frame 2 has a relief curved surface 25 in the middle of the front side. The first recess 21 and the second reinforcing ribs 22 increase the strength of the chassis frame 2. The relief curved surface 25 can ensure structural strength and avoid interference between the backrest frame and the bottom seat cushion frame when the backrest frame is adjusted.

[0035] In this embodiment, as Figure 8-9 As shown, both ends of the chassis frame 2 are integrally formed with overlapping edges 23. The inner sidewalls of the overlapping edges 23 are tightly fitted to the outer sidewalls of the first flange 14 and the second flange 15 and fixed by welding, resulting in good connection strength. At both ends of the chassis frame 2, arc-shaped ribs 24 are provided on both sides of the second reinforcing rib 22. The arc-shaped ribs 24 are arranged along the arc-shaped outer sidewalls of the chassis frame 2. The addition of arc-shaped ribs 24 is used to improve the overall structural strength of the chassis frame 2. A third reinforcing rib 27 is provided on the overlapping edge 23 on the rear side of the chassis frame 2, which improves the structural stability of the overlapping edge 23 and avoids deformation.

[0036] In this embodiment, as Figure 4-5 As shown, the upper end of the side plate body 11 is provided with two rectangular recesses 4, and the upper end of the first flange 14 is provided with a rectangular recess 4. The rectangular recess 4 is provided with an opening 41 for welding. The rectangular recess 4 is provided to improve the structural strength of the docking position, and the opening 41 is provided to facilitate rapid welding.

[0037] In this embodiment, as Figure 1 As shown, during the docking process, side plate frames 1 are first installed at both ends of the chassis frame 2. The overlapping edge 23 of the chassis frame 2 is attached to the outer side wall of the first flange 14 and the second flange 15. Welding is performed along the edge of the overlapping edge 23. After completion, the two ends of the U-shaped tube 3 are inserted into the insertion opening 16 of the two side plate frames 1. The U-shaped tube 3 is attached to the inner side wall of the rectangular recess 4. The U-shaped tube 3 is connected to the side plate frame 1 by welding through the opening 41 on the rectangular recess 4, thus completing the assembly of the backrest frame.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

Claims

1. A car backrest frame structure, comprising opposing side panel frames (1), wherein a chassis frame (2) is provided at the lower end of the side panel frames (1), and a U-shaped tube (3) is provided between the upper ends of the side panel frames (1), characterized in that: The side plate frame (1) includes a side plate body (11), the width of which gradually increases from top to bottom. A connecting part (12) is provided at the lower end of the side plate body (11), and a groove (13) is provided inwardly in the middle of the side plate body (11). The bottom of the groove (13) extends along the connecting part (12) and forms a folded extension part (18). Multiple first reinforcing ribs (17) are provided on both sides of the groove (13), and the first reinforcing ribs (17) are recessed from the outside to the inside.

2. The automobile backrest framework structure according to claim 1, characterized by: The front and rear sides of the side plate body (11) are provided with an inwardly folded first flange (14) and a second flange (15), and an insertion opening (16) is formed at the top.

3. The automobile backrest framework structure according to claim 2, characterized by: The first flange (14) is provided with flange reinforcing ribs (141) arranged along the arc surface, and the edge of the first flange (14) is folded back to form a third flange (142).

4. The automobile backrest framework structure according to claim 2, characterized by: The second flange (15) is provided with a plurality of mounting holes (152), and the edge of the second flange (15) is folded backward to form a fourth flange (151).

5. The automotive seat back frame structure of claim 1, wherein: The chassis frame (2) has a first recess (21) that is recessed forward on the rear side. The first recess (21) is rectangular. The chassis frame (2) has two long strip-shaped second reinforcing ribs (22) on the lower side. The chassis frame (2) has a relief curved surface (25) in the middle of the front side.

6. The automotive seat back frame structure of claim 2, wherein: Both ends of the chassis frame (2) are integrally formed with overlapping edges (23). The inner sidewalls of the overlapping edges (23) are tightly fitted to the outer sidewalls of the first flange (14) and the second flange (15) and fixed by welding.

7. The automotive seat back frame structure of claim 6, wherein: A third reinforcing rib (27) is provided on the overlapping edge (23) on the rear side of the chassis frame (2).

8. The automotive seat back frame structure of claim 2, wherein: The upper end of the side plate body (11) is provided with two rectangular recesses (4), and the upper end of the first flange (14) is provided with a rectangular recess (4). The rectangular recess (4) is provided with an opening (41) for welding.

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