Automobile seat backrest side plate structure based on TRB technology

Abstract

The utility model relates to the technical field of automobile seat, specifically disclose a car seat back side plate structure based on TRB technique, including back side plate (1), upper crossbeam (2), lower crossbeam (3), backrest spring frame (4) and buckle (5), its characterized in that: back side plate (1) is equipped with stress area (C), assembly area (H), thinning area (D) and unequal thick transition area (T). The utility model designs science, adopts the technology of different thick plates to reduce reasonable upper crossbeam thickness, and the structure is reasonable, and the effect is safe and reliable, and durable, and the weight loss effect is ideal.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to an automotive seat back panel structure based on TRB technology. Background Technology

[0002] Seats are an essential component of automobiles. Current technology for car seat back panels mostly uses uniformly thick steel plates or welded multi-section sheet metal, which has the following drawbacks:

[0003] 1. Weight redundancy: To meet the local strength requirements of the car seat back panel, the overall thickness and weight have increased.

[0004] 2. Stress concentration: Stress concentration is likely to occur around the mounting holes of the seat back panel, which can easily lead to breakage after long-term use or impact.

[0005] 3. Insufficient testing performance: In static strength tests (such as ECE R17 standard) and dynamic impact tests of seat back panels, traditional structures have low energy absorption efficiency, which can easily lead to excessive displacement of the seat back.

[0006] 4. Complex process: Multi-segment welding process increases manufacturing costs, and the weld area is prone to fatigue weak points. Summary of the Invention

[0007] The purpose of this utility model is to address the shortcomings of the existing technology by providing a car seat back panel structure based on TRB technology.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A car seat back panel structure based on TRB technology includes a back panel, an upper crossbeam, a lower crossbeam, a backrest spring frame, and buckles. The upper and lower crossbeams are fixedly connected to the upper and lower ends of the back panels on both sides of the seat, respectively, forming a backrest frame. The backrest spring frame is located inside the backrest frame and is connected to the backrest frame via buckles. The back panel has a stress zone, an assembly zone, a thinning zone, and an unequal thickness transition zone. The thickness of the stress zone is greater than the thickness of the assembly zone, and the thickness of the assembly zone is greater than the thickness of the thinning zone. The stress zone and the assembly zone are smoothly connected via the unequal thickness transition zone, and the assembly zone and the thinning zone are also smoothly connected via the unequal thickness transition zone.

[0010] The back panel has a stress-bearing area thickness of 11mm-12mm, an assembly area thickness of 10mm-11mm, and a thinning area thickness of 7mm-8mm.

[0011] The stress zone and assembly zone are smoothly transitioned by a double curvature gradient design through an unequal thickness transition zone. The assembly zone and thinning zone are also smoothly transitioned by a double curvature gradient design through an unequal thickness transition zone.

[0012] This utility model relates to a car seat back panel structure based on TRB technology. It is scientifically designed and uses differential thickness plate technology to reasonably reduce the thickness of the back panel. The structure is reasonable, safe and reliable, durable, and has an ideal weight reduction effect. Attached Figure Description

[0013] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0014] Figure 1 This is a schematic diagram of the seat back structure;

[0015] Figure 2 for Figure 1 Schematic diagram of the back panel from the right;

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of the AA-axis rotational section;

[0017] In the diagram: 1-Back panel; 2-Upper crossbeam; 3-Lower crossbeam; 4-Backrest spring frame; 5-Snap fastener; C-Stress zone; T-Unequal thickness transition zone; H-Assembly zone; D-Thinning zone; t1-Length of the transition zone between the welding zone and the assembly zone; t2-Length of the transition zone between the assembly zone and the thinning zone; cc-Thickness of the stress zone; hh-Thickness of the assembly zone; dd-Thickness of the thinning zone. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are merely illustrative of this utility model. Key terms that need attention in these descriptions, including "TRB technology," "symmetry (mirror image)," "hypercurvature gradient design," "unequal thickness transition zone," and "thinning zone," are only for the purpose of facilitating and simplifying the description of this utility model, and therefore should not be construed as limiting this utility model.

[0019] like Figure 1-2As shown, this utility model relates to an automotive seat back panel structure based on TRB technology. The back panel 1 is locally thickened in the stress zone C and assembly zone H of the lower crossbeam 3, and a gradient energy absorption scheme in the unequal thickness transition zone T. This significantly improves the installation strength and collision safety of the seat back panel. While ensuring lightweight, this structure uses a new rolling process of TRB technology—flexible rolling technology—to obtain a continuous variable cross-section thin plate. The thickness is reasonably reduced by using differential thickness plate technology to achieve integrated molding and avoid welding defects. It is suitable for passenger car and commercial vehicle seat systems with high safety requirements.

[0020] This utility model relates to a car seat back panel structure based on TRB technology, such as... Figure 1 As shown, it includes a backrest panel 1, an upper crossbeam 2, a lower crossbeam 3, a backrest spring frame 4, and a buckle 5. The upper crossbeam 2 and lower crossbeam 3 are respectively fixedly welded to the upper and lower ends of the backrest panels 1 on both sides of the seat, forming a backrest frame. The main body outline of the backrest panels 1 on the left and right sides of the seat is symmetrical (mirror image). The backrest spring frame 4 is located inside the backrest frame and is connected to the backrest frame 4 by the buckle 5. (See also...) Figure 2-3 As shown, in this embodiment, the integrated back panel 1 is provided with a stress-bearing area C, an assembly area H, a thinning area D, and an uneven thickness transition area T. Based on the actual stress situation, the stress-bearing area C of the back panel 1 is subjected to a large stress. The thickness cc of the stress-bearing zone C is greater than the thickness hh of the assembly zone H, and the thickness hh of the assembly zone H is greater than the thickness dd of the thinning zone D. The height (length) of the back side plate 1 of this utility model is generally 500-620mm. In this embodiment, the back side plate 1 has a height (length) of 560mm. As a preferred option, the thickness cc of the stress-bearing zone C is 1.1mm, the thickness hh of the assembly zone H is 1.0mm, and the thickness dd of the thinning zone D is 0.7mm. The stress-bearing zone C and the assembly zone H are smoothly connected by a transition zone T with unequal thickness. The length of their transition zone T (the transition zone length t1 between the stress-bearing zone C and the assembly zone H) is 10mm. The assembly zone H and the thinning zone D are also smoothly connected by a transition zone T with unequal thickness. The length of their transition zone T (the transition zone length t2 between the assembly zone H and the thinning zone D) is 30mm.

[0021] In this embodiment, the seat back panel 1 is made of high-quality, high-strength hot-rolled pickled steel sheet (QSte420TM). The specific design details of this embodiment are as follows:

[0022] I. Zoning

[0023] 1. Assembly Area H:

[0024] The assembly area H assembles some seat back accessories and backrest spring frames 4, etc. The edges of the mounting holes adopt a progressive chamfer (R angle 3-5mm) to reduce stress concentration. The assembly area thickness hh of the assembly area H is 1.0-1.1mm.

[0025] 2. Unequal thickness transition zone T:

[0026] The unequal thickness transition zone T is located on both sides of the headrest guide assembly area H, and its length is 100-120 times the thickness difference (for example, when the thickness difference is 0.1mm, the transition zone is 10-12mm long, and the thickness gradually changes from 1.1mm to 1.0mm). The unequal thickness transition zone T adopts a double curvature gradient design to ensure a smooth transition and avoid sudden changes in stiffness.

[0027] 3. Stress zone C:

[0028] The stress-bearing area C is the welding area between it and the lower crossbeam 3, which is the main stress-bearing area, and its stress-bearing area thickness cc is 1.1-1.2mm.

[0029] 4. Thinning zone D:

[0030] The thickness dd of the thinning region D is 0.7-0.8 mm, and weight reduction is achieved by thinning through the thinning region D.

[0031] II. Application of TRB Technology

[0032] 1. Two sets of back side panels are symmetrically arranged along the length of the sheet material during cutting, with a material utilization rate of ≥70%;

[0033] 2. Rolling tolerance is controlled within ±0.05mm;

[0034] 3. After hot stamping, the sheet metal has a yield strength ≥1200MPa and a tensile strength ≥1600MPa.

[0035] III. Testing Performance Advantages

[0036] 1. Assembly Static Strength Test: The radial reinforcing rib design of the back panel 1 increases the tensile strength of the mounting point by 30% and reduces the displacement by 40%;

[0037] 2. Dynamic impact test: The energy absorption ratio of the uneven thickness transition zone T reaches 60%, and the peak impact force is reduced by 15% (meeting the C-NCAP 5-star requirements).

[0038] 3. Fatigue test: The radial reinforcing rib design in relevant parts increases the cycle life by 50% and prevents the propagation of peripore cracks.

[0039] This utility model relates to a car seat back panel structure based on TRB technology. The thickness of the back panel 1 is measured by CATIA software. The original weight of a single back panel 1 was 0.872 kg. After reducing the thickness using the differential thickness plate technology of this utility model, the measured weight is 0.603 kg, which is a weight reduction of about 30%.

[0040] The above description is only a general embodiment of this utility model. For those skilled in the art, there are various other embodiments with modifications and variations, which will not be elaborated here. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model are included within the protection scope claimed by this utility model.

Claims

1. A car seat back panel structure based on TRB technology, comprising a back panel (1), an upper crossbeam (2), a lower crossbeam (3), a backrest spring frame (4), and a buckle (5), characterized in that, The upper crossbeam (2) and the lower crossbeam (3) are fixedly connected to the upper and lower ends of the backrest panels (1) on both sides of the seat to form a backrest frame. The backrest spring frame (4) is located inside the backrest frame and is connected to the backrest frame (4) by a buckle (5). The backrest panel (1) is provided with a stress area (C), an assembly area (H), a thinning area (D) and an unequal thickness transition area (T). The stress area thickness (cc) of the stress area (C) is greater than the assembly area thickness (hh) of the assembly area (H). The assembly area thickness (hh) of the assembly area (H) is greater than the thinning area thickness (dd) of the thinning area (D). The stress area (C) and the assembly area (H) are smoothly connected by the unequal thickness transition area (T). The assembly area (H) and the thinning area (D) are also smoothly connected by the unequal thickness transition area (T).

2. The automotive seat back panel structure based on TRB technology according to claim 1, characterized in that, The back panel (1) has a stress zone thickness (cc) of 1.1mm-1.2mm in the stress zone (C), an assembly zone thickness (hh) of 1.0mm-1.1mm in the assembly zone (H), and a thinning zone thickness (dd) of 0.7mm-0.8mm in the thinning zone (D).

3. The automotive seat back panel structure based on TRB technology according to claim 1, characterized in that, The stress zone (C) and assembly zone (H) are smoothly transitioned by a double curvature gradient design through an unequal thickness transition zone (T). The assembly zone (H) and thinning zone (D) are also smoothly transitioned by a double curvature gradient design through an unequal thickness transition zone (T).

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