Differential-thickness seat cross beam structure and automobile
By applying poor thick plate technology in the seat beam structure, dividing the intervals and setting transition areas, the problem of traditional seat beam structure increasing the body burden is solved, ensuring safety performance and improving material utilization are achieved, and the goal of reducing costs and weight is achieved.
Patent Information
- Application Number
- CN202421955978.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-13
AI Technical Summary
While improving safety performance, the traditional seat beam structure increases the body burden, making it difficult to achieve the goal of reducing costs and weight.
Differential thick plate technology (TRB) is used to divide odd intervals into the seat beam structure. The plate thicknesses of adjacent intervals are different, and transition zones are set up to achieve the demand for strength and stiffness while saving materials.
On the premise of ensuring safety performance, the total thickness of the board is reduced, and the material utilization rate is improved, the body weight is reduced and the production cost is reduced, which is in line with the needs of green development.
Smart Images
Figure CN222921418U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobiles, in particular to a differential thickness seat crossbeam structure and an automobile. Background Art
[0002] In the process of the development of automobiles, new energy vehicles have attracted more and more attention, and people's requirements for safety, lightweight, energy conservation and emission reduction are also getting higher and higher. Tailor Rolled Blank (TRB) technology is a flexible rolling technology that uses dynamic change of roll gap to roll the target thickness. The method of making a TRB plate is to control the spacing of the rolling rolls in real time by a computer during the steel plate rolling process to obtain a cross-sectional thickness customized in advance along the rolling direction. The TRB technology can produce steel plates with variable thickness, which can not only meet some specific requirements, but also reduce costs and weights, and save energy and reduce emissions. At present, it has been widely used in the B-pillars of automobiles. The traditional seat crossbeam structure improves safety performance by simply increasing the material thickness, which ensures safety but brings a greater burden to the vehicle body. Therefore, extending the mature TRB technology applied to the B-pillar to the seat crossbeam structure is beneficial to cost reduction and weight reduction, and meets the needs of green development. Content of the Utility Model
[0003] The purpose of the utility model is to provide a differential thickness seat crossbeam structure, which reduces the plate thickness in some areas compared with the traditional seat crossbeam structure. On the premise of ensuring safety performance, it can not only meet the requirements of strength and stiffness, but also save materials, reduce the vehicle body weight, and contribute to the goal of vehicle body lightweight.
[0004] The utility model provides the following solutions:
[0005] In a first aspect, the utility model discloses a differential thickness seat crossbeam structure, including: a TRB differential thickness plate, the TRB differential thickness plate is divided into an odd number of intervals in the length direction, the plate thicknesses of adjacent intervals are different, the plate thickness within each interval is the same, and transition zones are provided between adjacent intervals;
[0006] The plate thicknesses of the intervals symmetrical about the center line of the TRB differential thickness plate are the same, and the lengths of the transition zones symmetrical about the center line of the TRB differential thickness plate are the same.
[0007] Preferably, the number of intervals is at least five.
[0008] Preferably, the interval includes a central interval C and two end intervals A and E, as well as several thickness-reducing intervals B and D provided between the central interval C and the two end intervals A and E. The center line of the central interval C coincides with the center line of the TRB variable-thickness plate, and the thicknesses of the central interval C and the two end intervals A and E are both greater than those of the thickness-reducing intervals B and D.
[0009] Preferably, seat mounting holes are provided on the two end intervals A and E, markings are engraved on the thickness-reducing intervals B and D, and a cavity is provided inside the central interval C.
[0010] Preferably, the thickness difference between the plates of adjacent intervals is less than or equal to 0.5 mm.
[0011] Preferably, it includes two TRB variable-thickness plates with different widths, and the TRB variable-thickness plate with a smaller width is fixedly arranged inside the TRB variable-thickness plate with a larger width.
[0012] Preferably, it further includes a patch plate. The patch plate is an equal-thickness plate. The patch plate is fixedly arranged inside the TRB variable-thickness plate. The fillet of the patch plate fits the fillet of the TRB variable-thickness plate, and the through holes of the patch plate have the same shape and are in opposite positions to the through holes of the TRB variable-thickness plate.
[0013] In a second aspect, the present invention also records an automobile, including the above-mentioned variable-thickness seat crossbeam structure.
[0014] The present invention has the following advantages compared with the prior art:
[0015] 1. The present invention adopts a TRB variable-thickness plate, without weld seams, with good surface quality of the steel plate and good uniformity of tissue properties; it eliminates a series of welding and related processes, reduces production costs, energy consumption and process losses; it can be continuously produced, with high production efficiency, easy operation and good reliability; it can conveniently process different thicknesses on the plate, and is suitable for producing plates with a combination of two or more thicknesses; the length and shape of the transition zone can be controlled, and the transition curve can be designed according to the stress conditions of the stamping part during service.
[0016] 2. Based on the symmetrical structure of the seat crossbeam and the functions to be achieved by each part, the present invention divides the TRB variable-thickness plate into multiple symmetrical intervals. Among them, the thicknesses of the two end intervals and the central interval are relatively thick, and the thickness of the thickness-reducing interval located in the middle of the two is relatively thin. On the premise of ensuring safety performance, it can not only meet the requirements for strength and stiffness of the two end intervals and the central interval, but also save the materials used in the thickness-reducing interval, achieving the design goals of improving material utilization rate, reducing weight and cost, and contributing to the goal of vehicle body lightweighting.
[0017] 3. When a higher strength is required for the seat crossbeam structure of the present utility model, it can be achieved by using a combination of two TRB tailor rolled blanks or a combination of one patch plate and one tailor rolled blank, which has a high assembly flexibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 It is a schematic diagram of the distribution of intervals and transition zones on the tailor rolled blank of the present utility model;
[0020] Figure 2 It is a schematic diagram of the structure of the tailor rolled blank and the patch plate of the present utility model.
[0021] In the figure:
[0022] 1. Tailor rolled blank; 2. Patch plate; A. Left end interval; B. Left thickness reduction interval; C. Central interval; D. Right thickness reduction interval; E. Right end interval. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.
[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.
[0025] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.
[0026] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present application for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.
[0027] Depending on the context, as used herein, the words "if", "when" can be interpreted as "when...", "when...", or "in response to determining", or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined", "in response to determining", "when detected (stated condition or event)", or "in response to detecting (stated condition or event)".
[0028] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a commodity or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or device comprising said element.
[0029] It should be particularly noted that symbols and / or numbers present in the specification that are not marked in the drawings description are not drawing reference numerals.
[0030] Embodiment 1
[0031] See Figure 1 As shown, a differential thickness seat crossbeam structure provided by an embodiment of the present application includes: a TRB differential thickness plate 1, the TRB differential thickness plate 1 divides an odd number of intervals in the length direction, the plate thicknesses of adjacent intervals are different, the plate thickness within each interval is the same, and transition zones are provided between adjacent intervals;
[0032] The plate thicknesses of the intervals symmetrical about the center line of the TRB differential thickness plate 1 are the same, and the lengths of the transition zones symmetrical about the center line of the TRB differential thickness plate 1 are the same.
[0033] The TRB differential thickness plate 1 divides a plurality of symmetrical intervals according to the symmetrical structure of the seat crossbeam and the functions to be achieved by each part. When designing the plate thickness within each interval, the intervals with low strength requirements are thinned to save materials and thus reduce cost and weight; the transition zones are provided between two intervals and are flat or curved to ensure a smooth transition between adjacent intervals.
[0034] See Figure 1 As shown, the number of intervals is at least five.
[0035] If the number of intervals is one, it is essentially an equal-thickness plate, which is the same as the conventional seat crossbeam structure. If the number of intervals is three, it cannot well ensure the strength requirements at both ends and in the middle of the seat crossbeam structure. Therefore, it is generally not three. When dividing the intervals, it is necessary to comprehensively consider the shape of the crossbeam structure and the things arranged on the crossbeam structure. For example, the engraved markings cannot span intervals. If there is a thickness change on the plate, the markings cannot be engraved. Designing too many intervals will also increase the processing procedures. Therefore, the number of intervals is generally five or seven.
[0036] See Figure 1 As shown, the intervals include the central interval C and the end intervals A and E, as well as several thickness-reducing intervals B and D arranged between the central interval C and the end intervals A and E. The center line of the central interval C coincides with the center line of the TRB variable-thickness plate. The thicknesses of the central interval C and the end intervals A and E are both greater than those of the thickness-reducing intervals B and D.
[0037] The seat crossbeam structure undertakes the task of the main load transfer path in the vehicle safety - side impact condition. The strength of the crossbeam plays a crucial role in side impact safety. The left end interval A and the right end interval E are close to the sill, and they are subjected to large forces during a side impact. Although the central interval C basically does not directly collide, it spans the middle channel and has a cavity inside, making it prone to bending. Therefore, the plate thicknesses of the central interval C and the end intervals A and E are thicker to ensure higher strength.
[0038] The plate thickness ranges of the central interval C and the end intervals A and E are 1.9 - 2.2 mm, and the plate thickness ranges of the thickness-reducing intervals B and D are 1.6 - 1.9 mm. When the plate thickness difference between two adjacent intervals in the transition zone is 0 - 0.2 mm, the length of the transition zone is 10 - 20 mm; when the plate thickness difference between two adjacent intervals in the transition zone is 0.2 - 0.3 mm, the length of the transition zone is 20 - 30 mm; when the plate thickness difference between two adjacent intervals in the transition zone is 0.3 - 0.5 mm, the length of the transition zone is 30 - 50 mm. The TRB variable-thickness plate 1 that meets the above indicators can not only ensure strength but also achieve cost reduction and weight reduction.
[0039] See Figure 1 、 2 As shown, seat mounting holes are provided on the end intervals A and E, markings are engraved on the thickness-reducing intervals B and D, and a cavity is provided inside the central interval C.
[0040] Seat mounting holes are provided at both ends of the seat crossbeam structure for installing seats. A marking engraving area is set on the thickness-reducing interval D. For the thickness-reducing interval B, whether to set a marking engraving area can be selected according to different vehicle models. The central interval C spans the middle channel, has a cavity inside, and is provided with seat mounting holes.
[0041] See Figure 1 As shown, when the thickness difference of the plates in adjacent intervals is less than or equal to 0.5 mm, it has better use effects.
[0042] See Figure 1 As shown, it includes two TRB differential thickness plates 1 with different widths. The TRB differential thickness plate 1 with a smaller width is fixedly arranged inside the TRB differential thickness plate 1 with a larger width.
[0043] When a seat crossbeam structure with higher strength is needed, it can be selected to sleevethe TRB differential thickness plate 1 with a larger width outside the TRB differential thickness plate 1 with a smaller width. Since the TRB differential thickness plate 1 is provided with flange plates for connecting to the bottom plate on both sides, during vehicle body assembly, the flange plates of the two TRB differential thickness plates 1 are fixedly connected to the bottom plate located below the seat crossbeam structure by welding or other means, but the total thickness of the two flange plates and the bottom plate cannot exceed 6 mm, otherwise welding cannot be performed.
[0044] See Figure 1 、 2 As shown, it further includes a patch plate 2. The patch plate 2 is an equal-thickness plate. The patch plate 2 is fixedly arranged inside the TRB differential thickness plate 1. The fillet of the patch plate 2 fits the fillet of the TRB differential thickness plate 1. The through holes of the patch plate 2 have the same shape and relative positions as the through holes of the TRB differential thickness plate 1, that is, the sizes of the through holes and the XY coordinates of the hole centers are the same.
[0045] When a seat crossbeam structure with higher strength is needed, it can also be selected to use a combination of one TRB differential thickness plate 1 and one patch plate 2. The patch plate 2 is closely attached inside the TRB differential thickness plate 1 by welding, so as to strengthen the strength of the TRB differential thickness plate 1. Since flange plates are not provided on both sides of the patch plate 2, during vehicle body assembly, the flange plate of the TRB differential thickness plate 1 can be welded to the bottom plate. When the total thickness of the flange plates of the two TRB differential thickness plates 1 and the bottom plate exceeds 6 mm, a combination of one TRB differential thickness plate 1 and one patch plate can be selected to strengthen the structure.
[0046] Furthermore, the TRB differential thickness plate 1 is a hot-formed plate produced by rolling, and the material is 22MnB5 AS, which can achieve higher strength with lower weight and thinner thickness; when the production method of the patch plate 2 is hot forming, the material is FC650 / 980DP+Z-50 / 50 (where C: cold rolling, 650: specified minimum yield strength is 650, unit MPa; 980: specified minimum tensile strength is 980, unit MPa, DP: dual-phase steel, Z: pure zinc coating; 50 / 50: zinc coating weight on the upper surface is 50 g, zinc coating weight on the lower surface is 50 g); when the production method is cold stamping, the material is 22MnB5 AS, and the width of the patch plate 2 is 5-10 mm less than the width of the TRB differential thickness plate 1.
[0047] Embodiment 2
[0048] An embodiment of the present application provides an automobile, including the above-mentioned differential-thickness seat crossbeam structure, which realizes the lightweight of the vehicle body and meets the requirements of energy conservation and environmental protection.
[0049] The working principle of the present utility model is as follows:
[0050] The thickness of the sheet at both ends of the interval A and E near the sill and at the central interval C across the middle channel is relatively thick, while the thickness of the sheet at the thinning intervals B and D with lower strength requirements is relatively thin. Compared with the traditional seat crossbeam structure, on the premise of ensuring safety performance, it can not only meet the requirements of strength and stiffness, but also save materials, reduce the vehicle body weight, and contribute to the lightweight goal of the vehicle body.
[0051] Finally, it should be noted that the embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.
[0052] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A differential thickness seat crossbeam structure, characterized in that: The invention comprises: a TRB differential thickness plate (1), wherein the TRB differential thickness plate (1) is divided into an odd number of sections in the length direction, the thickness of the plates in adjacent sections is different, the thickness of the plates in each section is the same, and transition zones are provided between adjacent sections; The plate thickness of the interval symmetrical with the center line of the TRB thickness difference plate (1) as the symmetry axis is the same, and the length of the transition zone symmetrical with the center line of the TRB thickness difference plate (1) as the symmetry axis is the same.
2. The differential thickness seat crossbeam structure according to claim 1, characterized in that: The number of the intervals is at least five.
3. The differential thickness seat cross beam structure according to claim 2, characterized in that: The interval includes a central interval (C) and two end intervals (A, E) and a plurality of thickness reduction intervals (B, D) arranged between the central interval (C) and the two end intervals (A, E). The center line of the central interval (C) coincides with the center line of the TRB differential thickness plate, and the thickness of the central interval (C) and the two end intervals (A, E) are both greater than the thickness reduction interval (B, D).
4. The differential thickness seat cross beam structure according to claim 3, characterized in that: The two end sections (A, E) are provided with seat mounting holes, the reduced thickness sections (B, D) are engraved with logos, and the central section (C) is provided with a cavity.
5. The differential thickness seat cross beam structure according to claim 1, characterized in that: The thickness difference of the plate materials between adjacent sections is less than or equal to 0.5 mm.
6. The differential thickness seat cross beam structure according to claim 1, characterized in that: It comprises two TRB thickness difference plates (1) with different widths, wherein the TRB thickness difference plate (1) with a smaller width is fixedly arranged inside the TRB thickness difference plate (1) with a larger width.
7. The differential thickness seat cross beam structure according to claim 1, characterized in that: It also includes a patch plate (2), which is a plate of equal thickness. The patch plate (2) is fixedly arranged in the TRB differential thickness plate (1), the rounded corners of the patch plate (2) are in contact with the rounded corners of the TRB differential thickness plate (1), and the through holes of the patch plate (2) are of the same shape as the through holes of the TRB differential thickness plate (1) and are positioned opposite to each other.
8. A car, characterized in that: It comprises a differential thickness seat crossbeam structure as claimed in any one of claims 1 to 7.