Vehicle body middle channel structure based on advanced high-strength steel

Abstract

The utility model provides an automobile body middle channel structure based on advanced high-strength steel, which relates to the field of automobile structure optimization design and comprises a middle channel, a bottom left floor and a bottom right floor are respectively welded on two sides of the middle channel, and side wing seat cross beams are respectively arranged on the bottom left floor and the bottom right floor. A plurality of top double-side reinforcing pieces are arranged above the middle channel, the top double-side reinforcing pieces are of a double-body structure, and the top double-side reinforcing pieces and the middle channel form a double-cavity structure. By the adoption of the structure, the intrusion amount of the firewall can be effectively reduced during front collision of the vehicle body, the bending rigidity of the vehicle body is improved, and the safety performance and control performance of the vehicle body are integrally improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile structure optimization design especially, relate to a car body middle passageway structure based on advanced high strength steel. BACKGROUND

[0002] In recent years, along with people living standard unceasing enhancement, people to the demand of car is bigger and bigger, and the car as an important means of transportation, it also plays a very important role in people's daily life and work, it is due to these factors promote, so make our country's automobile industry in recent years has been good development.

[0003] In recent years, the consumer to the car body safety and the control performance requirement is higher and higher, to the car body design rationality and the reliability also follow the improvement.

[0004] The traditional car body mostly adopts single layer structure in the middle passageway area, the structure does not have the advantage when facing the car body frontal crash test, leading to the firewall intrusion amount is too high, influence the cockpit safety. Meanwhile single layer structure is not conducive to the improvement of the bending stiffness of the car body, influence the overall control performance. In recent years, the big enterprises gradually adopt double layer type middle passageway structure, the structure effectively improves the frontal crash test data, and the bending stiffness of the car body also has certain improvement. But at present the upper cover plate in double layer structure mostly uses ordinary high strength steel, and the improvement degree of the car body performance is limited. To further improve the car body performance, the car body structure still needs continuous optimization. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a car body middle passageway structure based on advanced high strength steel, improves the bending stiffness of the car body, reduces the firewall intrusion when frontal crash.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A car body middle passageway structure based on advanced high strength steel, including middle passageway, the both sides of the middle passageway are respectively welded bottom left floor and bottom right floor, the bottom left floor, bottom right floor are respectively provided with side wing seat crossbeam, the top of the middle passageway is provided with several top double side reinforcing pieces.

[0008] Further, the side wing seat crossbeam includes front seat crossbeam and rear seat crossbeam, one end of the front seat crossbeam and rear seat crossbeam is respectively welded with the middle passageway.

[0009] Further, the top double side reinforcing piece is double body structure, and the top double side reinforcing piece forms a double cavity structure with the middle passageway.

[0010] Further, the top double side reinforcing pieces gradually increase from front to rear cavity.

[0011] Further, the top double-sided reinforcement uses DH780 or DH980 level advanced high-strength steel.

[0012] Further, the top double-sided reinforcement is connected with the middle channel by spot welding, and the top double-sided reinforcement is connected with the side wing seat cross beam by spot welding or protective welding or screwing.

[0013] The beneficial effects of the utility model lie in:

[0014] The structure can effectively reduce the intrusion amount of the firewall during the front collision of the vehicle body, improve the bending stiffness of the vehicle body, and improve the safety performance and control performance of the vehicle body as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0016] Figure 1 It is a schematic diagram of the prior art part composition.

[0017] Figure 2 It is a schematic diagram of the structure composition of the utility model.

[0018] Figure 3 It is a schematic diagram of the prior art cross section.

[0019] Figure 4 It is a schematic diagram of the cross section of the utility model.

[0020] Explanation of reference numerals:

[0021] 1, middle channel; 2, bottom left floor; 3, bottom right floor; 4, front seat cross beam; 5, rear seat cross beam; 6, middle channel cover plate; 7, top double-sided reinforcement. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is merely illustrative, and is by no means intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0025] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application unless specifically stated otherwise. It should be clear that the sizes of the various portions shown in the drawings are not drawn to scale for ease of description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the authorized description where appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as limiting. Thus, other examples of exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of contrary statements, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application: the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0027] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "front", "back", "upper", "lower", "horizontal", "vertical", "above", "below", "top", "bottom", "under", and the like, can be used herein for ease of description to describe one element's or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is inverted or rotated by 90 degrees, then an element described as "above" or "up" another element or feature would now be oriented "below" or "down" the other element or feature. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. can be used herein to describe various elements, regions, layers and / or sections but are not intended to be used herein to designate importance or a particular order of manufacture.

[0028] The utility model provides a technical scheme: a car body middle channel structure based on advanced high strength steel, as shown in the figure, including middle channel 1, the both sides of middle channel 1 are welded bottom left floor 2 and bottom right floor 3 respectively, and the bottom left floor 2, bottom right floor 3 are provided with side wing seat crossbeam respectively, and the top of middle channel 1 is provided with several top double side reinforcing members 7. Figures 1-4

[0029] The side wing seat crossbeam includes front seat crossbeam 4 and rear seat crossbeam 5, and one end of the front seat crossbeam 4 and the rear seat crossbeam 5 is welded with the middle channel 1 respectively.

[0030] The top double side reinforcing member 7 is connected with the middle channel 1 in the mode of spot welding, and is connected with the side wing seat crossbeam in the mode of spot welding or protective welding or screwing.

[0031] The top double side reinforcing member 7 is a double body structure, and the top double side reinforcing member 7 forms a double cavity structure with the middle channel 1, effectively strengthens the frontal impact resistance and the local bending resistance of the car body.

[0032] The top double side reinforcing member 7 can be adjusted in shape according to actual lapping requirements.

[0033] The size of the double cavity formed by the top double side reinforcing member 7 can be adjusted according to actual performance requirements, so as to obtain an optimal weight and cost scheme.

[0034] The top double side reinforcing member 7 uses advanced high strength steel as the material to ensure the improvement of structural strength, for example, DH780, DH980 grade material.

[0035] The top double side reinforcing member 7 adopts a design of gradually increasing from the front to the rear cavity to maintain the gradually enhanced effect of the cavity structure formed by the middle channel.

[0036] Embodiment 1

[0037] ​The original structure vehicle body frontal impact selects three points in the middle channel lap joint area for verification, and the intrusion amounts are 39.6mm, 40.4mm and 38.5mm respectively;

[0038] The original structure vehicle body bending stiffness test result is 23430N / mm;

[0039] According to the original vehicle body structure, the middle channel cover plate 6 is further optimized to be a top double-sided reinforcement 7, the reinforcement plate is selected to be DH780+Z material, the thickness is consistent with the original cover plate, the overall weight is reduced by 0.35kg, the cavity width formed by the top double-sided reinforcement 7 and the middle channel 1 is 65mm, the height is the same as the original design cover plate height, only the rear area is increased by 5mm, all the functional lap joint areas remain unchanged, the top double-sided reinforcement 7 and the middle channel 1 are point welded, the front seat cross beam 4 is protection welded, and the rear seat cross beam 5 is screwed.

[0040] The optimized vehicle body frontal impact selects three points in the middle channel lap joint area for verification, and the intrusion amounts are 33.3mm, 36.4mm and 35.1mm respectively;

[0041] The optimized vehicle body bending stiffness test result is 26086N / mm.

[0042] The optimized firewall intrusion amount is reduced by about 4mm, the vehicle body bending stiffness is increased by 10.1%, and the optimization effect is good.

[0043] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A vehicle body central tunnel structure based on advanced high-strength steel, characterized in that, It includes a central channel (1), with a bottom left floor (2) and a bottom right floor (3) welded to both sides of the central channel (1). Side wing seat beams are respectively provided on the bottom left floor (2) and bottom right floor (3). Several top double-sided reinforcing members (7) are provided above the central channel (1).

2. The vehicle body channel structure based on advanced high-strength steel according to claim 1, characterized in that, The side wing seat crossbeams include a front seat crossbeam (4) and a rear seat crossbeam (5), with one end of the front seat crossbeam (4) and the rear seat crossbeam (5) respectively welded to the central channel (1).

3. The vehicle body channel structure based on advanced high-strength steel according to claim 1, characterized in that, The top double-sided reinforcing member (7) is a double-body structure, and the top double-sided reinforcing member (7) and the middle channel (1) form a double-cavity structure.

4. The vehicle body channel structure based on advanced high-strength steel according to claim 3, characterized in that, The cavity of the top double-sided reinforcing member (7) gradually increases from front to back.

5. The vehicle body channel structure based on advanced high-strength steel according to claim 1, characterized in that, The top double-sided reinforcing member (7) is made of advanced high-strength steel of grade DH780 or DH980.

6. The vehicle body channel structure based on advanced high-strength steel according to claim 1, characterized in that, The top double-sided reinforcing member (7) is connected to the central channel (1) by spot welding, and the top double-sided reinforcing member (7) is connected to the side wing seat crossbeam by spot welding, shielded welding or screw connection.

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