An upper side beam structure, a vehicle body and a vehicle

Abstract

The application provides an upper side beam structure, a vehicle body and a car, and relates to the field of automobile body structure design.The upper side beam structure comprises an upper side beam inner plate, an upper side beam outer plate and a variable cross-section reinforcing member.The upper side beam inner plate is installed in cooperation with the upper side beam outer plate.The variable cross-section reinforcing member is arranged between the upper side beam inner plate and the upper side beam outer plate.The variable cross-section reinforcing member is arranged in the front-rear direction of the car.The outer wall of the variable cross-section reinforcing member forms a first reinforcing cavity together with the upper side beam inner plate and the upper side beam outer plate.The variable cross-section reinforcing member is internally hollow to form a second reinforcing cavity.The scheme has the advantages that the variable cross-section reinforcing member is arranged between the upper side beam inner plate and the upper side beam outer plate, the variable cross-section reinforcing member plays the role of a reinforcing member and a partition at the same time, the inner part and the outer part of the variable cross-section reinforcing member form reinforcing cavities respectively, and the double-cavity structure improves the multi-dimensional bending and compression resistance of the entire upper side beam structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile, in particular to an upper side beam structure, a vehicle body and an automobile. BACKGROUND

[0002] The upper side beam is one of the key problems in the field of vehicle body safety development. Since the upper side beam needs to bear impact forces in three dimensions of transverse, longitudinal and vertical directions, the current safety test conditions for this area include 25% small offset collision condition, top compression condition, side movable barrier collision condition and side column collision high-speed collision condition. In order to meet the bending strength requirement, manufacturers generally increase the thickness of the upper side beam inner plate and outer plate or set a reinforcing plate to meet the safety requirement. However, this not only increases the weight, but also has limited improvement in bending capacity, and increases the blind area of the front driver's view, increasing the risk of pedestrian accidents outside the vehicle. SUMMARY

[0003] The present application aims to solve the technical problem of large weight and poor bending capacity of the existing automobile upper side beam.

[0004] In a first aspect, the present application provides an upper side beam structure, comprising an upper side beam inner plate, an upper side beam outer plate and a variable cross-section reinforcing member. The upper side beam inner plate is installed in cooperation with the upper side beam outer plate. The variable cross-section reinforcing member is arranged between the upper side beam inner plate and the upper side beam outer plate. The variable cross-section reinforcing member is arranged to extend in the front-rear direction of the vehicle. The outer wall of the variable cross-section reinforcing member forms a first reinforcing cavity with the upper side beam inner plate and the upper side beam outer plate. The inside of the variable cross-section reinforcing member is hollow to form a second reinforcing cavity.

[0005] The upper side beam structure of the present application sets a variable cross-section reinforcing member between the upper side beam inner plate and the upper side beam outer plate. The cross-sectional size of the variable cross-section reinforcing member varies in the front-rear direction of the vehicle. Therefore, the cross-sectional size of different positions can be flexibly set according to the bending requirement of the upper side beam. Compared with setting a reinforcing plate with uniform thickness according to the maximum impact force bearing requirement of the upper side beam, the overall weight and cross-sectional size of the upper side beam can be reduced, the driver's view blind area can be reduced, and the driving safety can be improved. Moreover, the variable cross-section reinforcing member not only has a reinforcing effect, but also acts as a partition. The outer wall of the variable cross-section reinforcing member forms a first reinforcing cavity with the upper side beam inner plate and the upper side beam outer plate. The inside of the variable cross-section reinforcing member forms a second reinforcing cavity. The double-cavity structure further improves the multi-dimensional bending and compression resistance of the entire upper side beam structure.

[0006] Optionally, the upper side beam outer plate comprises a front upper side beam outer plate and a rear upper side beam outer plate, the front upper side beam outer plate and the rear upper side beam outer plate are arranged at intervals along the extension direction of the variable cross-section stiffener, and the front upper side beam outer plate and the rear upper side beam outer plate are connected with the variable cross-section stiffener respectively, the cross-section size of the variable cross-section stiffener gradually increases along the direction from the front upper side beam outer plate to the rear upper side beam outer plate.

[0007] Optionally, the cross-section shape of the variable cross-section stiffener is triangular, two side walls of the variable cross-section stiffener are connected with the upper side beam outer plate in a fit manner, and the other side wall of the variable cross-section stiffener and the upper side beam inner plate form the first reinforcing cavity.

[0008] Optionally, the first reinforcing cavity comprises a transverse reinforcing cavity and a vertical reinforcing cavity which are in communication with each other, the transverse reinforcing cavity is arranged along the width direction of the automobile, and the vertical reinforcing cavity is arranged along the height direction of the automobile.

[0009] Optionally, the cross-section shape of the variable cross-section stiffener is quadrilateral.

[0010] Optionally, the upper side beam outer plate is provided with a soft structure at the connection position with the B column;

[0011] And / or, the upper side beam outer plate is provided with a pressing groove near the connection position with the B column, and the pressing grooves are arranged at intervals along the extension direction of the upper side beam outer plate.

[0012] Optionally, the upper side beam inner plate comprises a front upper side beam inner plate and a rear upper side beam inner plate, and the front upper side beam inner plate and the rear upper side beam inner plate are welded and fixed.

[0013] In a second aspect, the present application provides a vehicle body comprising the above-mentioned upper side beam structure. The vehicle body has the same advantages as the above-mentioned upper side beam structure, and will not be described again.

[0014] Optionally, the vehicle body further comprises a B column, and the front upper side beam outer plate of the upper side beam structure is welded and fixed with the B column to form a half-door ring structure.

[0015] In a third aspect, the present application provides an automobile comprising the above-mentioned vehicle body. The automobile has the same advantages as the above-mentioned vehicle body, and will not be described again. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of an upper side beam structure of an embodiment of the present application;

[0017] Figure 2 FIG. 2 is an exploded structural schematic diagram of the upper side beam structure of the embodiment of the present application;

[0018] Figure 3 Structure diagram of variable cross-section reinforcement of the embodiment of the present application;

[0019] Figure 4 Structure diagram of variable cross-section reinforcement of the embodiment of the present application;

[0020] Figure 5 Structure diagram of variable cross-section reinforcement of the embodiment of the present application;

[0021] Explanation of reference numerals:

[0022] 1, upper side beam inner plate; 11, front upper side beam inner plate; 12, rear upper side beam inner plate; 2, upper side beam outer plate; 21, front upper side beam outer plate; 211, soft structure; 212, pressing groove; 22, rear upper side beam outer plate; 3, variable cross-section reinforcement; 31, second reinforcement cavity; 4, first reinforcement cavity; 41, transverse reinforcement cavity; 42, vertical reinforcement cavity; 5, B pillar. DETAILED DESCRIPTION

[0023] In order to make the above object, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0024] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fitting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In addition, it should be noted that in the description of the present application, it should be noted that the terms such as "upper", "lower", "front", "rear" and other words indicating the position in each embodiment only indicate the positional relationship based on the drawings of the specification, and do not represent that the elements and devices referred to must be operated according to the specific position and limited operation and method, structure in the specification, and such positional terms do not constitute a limitation on the present application.

[0026] A coordinate system XYZ is established herein, in which the positive direction of the X axis represents the front direction, the negative direction of the X axis represents the rear direction, the positive direction of the Y axis represents the left direction, the negative direction of the Y axis represents the right direction, the positive direction of the Z axis represents the upward direction, and the negative direction of the Z axis represents the downward direction.

[0027] Figure 4 The two thick straight arrows in the figure represent the side impact force direction and the top pressure direction, respectively, Figure 4Two arc-shaped arrows in the figure indicate the rotation direction of the roof rail structure when subjected to lateral impact force and top pressure.

[0028] In the safety test of the automobile roof rail, the roof rail needs to bear the impact force of 120KN in the small offset working condition, the pressure of 85KN in the top pressure resistance, and the side crash force transmitted by the B column in the side moving collision, and the roof rail needs to bear the bending strength in multiple dimensions. The existing method of increasing the thickness of the inner and outer plates of the reinforced roof rail and adding reinforcing plates greatly increases the overall weight, and the improvement of the bending strength is limited. Moreover, with the pursuit of the sense of permeability of the vehicle body, the B column inner plate has almost no width space in the Y direction. Although the B column inner plate with the upper wide and lower narrow shape in the Y direction provides the condition for bearing the Y direction side crash force, the B column inner plate bears the main impact force, and the force transmitted to the roof rail inner plate is greatly increased, so that the welding points between the roof rail inner and outer plates and the B column are easily broken, affecting the normal use of the vehicle.

[0029] As shown in Figure 1 , 2 , 4, the embodiment of the present application provides a roof rail structure, which comprises a roof rail inner plate 1, a roof rail outer plate 2 and a variable cross-section reinforcing member 3. The roof rail inner plate 1 is installed in cooperation with the roof rail outer plate 2. The variable cross-section reinforcing member 3 is arranged between the roof rail inner plate 1 and the roof rail outer plate 2. The variable cross-section reinforcing member 3 is arranged to extend along the front-rear direction of the vehicle. The outer wall of the variable cross-section reinforcing member 3, the roof rail inner plate 1 and the roof rail outer plate 2 form a first reinforcing cavity 4. The inside of the variable cross-section reinforcing member 3 is hollow to form a second reinforcing cavity 31.

[0030] In the embodiment, the automobile roof rail structure is arranged on the roof and is arranged symmetrically left and right. The existing single-side roof rail structure is taken as an example for description. The roof rail inner plate 1 and the roof rail outer plate 2 are arranged oppositely and both extend along the front-rear direction of the vehicle. The roof rail inner plate 1 and the roof rail outer plate 2 are respectively formed by cold stamping, and are fixed by laser welding after being installed in cooperation. The laser welding points between the roof rail outer plate 2 and the roof rail inner plate 1 can be arranged at multiple positions.

[0031] The upper side beam inner plate 1 and the upper side beam outer plate 2 can be a semi-enclosed structure, and after being installed together, a cavity is formed inside, and the variable cross-section reinforcing member 3 is a variable cross-section profile, which is roll-formed and arranged in the cavity to strengthen the overall strength of the upper side beam. The existing reinforcing plate with uniform thickness is generally set according to the position with the maximum impact force strength requirement of the automobile upper side beam. Since the cross-sectional size of the variable cross-section reinforcing member 3 at each position along the extension direction is designed according to the strength requirement of the corresponding position, the cross-sectional size of the variable cross-section reinforcing member 3 at the position with smaller bending strength requirement is designed to be smaller, and accordingly, the outer contour surrounded by the upper side beam inner plate and the upper side beam outer plate can also be set to be smaller, thereby reducing the overall weight and cross-sectional size of the upper side beam structure and realizing the lightweight and slimness of the upper side beam structure.

[0032] Here, the first reinforcing cavity 4 is formed between the outer wall of the variable cross-section reinforcing member 3 and the upper side beam inner plate 1 and the upper side beam outer plate 2, and the second reinforcing cavity 31 is formed in the hollow interior of the variable cross-section reinforcing member 3. The variable cross-section reinforcing member 3 reduces the weight while forming a double-cavity structure together with the first reinforcing cavity 4, thereby further improving the bending resistance in multiple dimensions (different directions).

[0033] As shown in Figures 2-3 Optionally, the upper side beam outer plate 2 includes a front upper side beam outer plate 21 and a rear upper side beam outer plate 22, the front upper side beam outer plate 21 and the rear upper side beam outer plate 22 are arranged at intervals along the extension direction of the variable cross-section reinforcing member 3, and the front upper side beam outer plate 21 and the rear upper side beam outer plate 22 are connected with the variable cross-section reinforcing member 3, respectively, and the cross-sectional size of the variable cross-section reinforcing member 3 gradually increases along the direction from the front upper side beam outer plate 21 to the rear upper side beam outer plate 22.

[0034] In the embodiment, the front upper side beam outer plate 21 is arranged at a position close to the front of the automobile, and the rear upper side beam outer plate 22 is arranged at a position close to the rear of the automobile, and the front upper side beam outer plate 21 and the rear upper side beam outer plate 22 are welded and fixed with the variable cross-section reinforcing member 3.

[0035] The length of the front upper side beam outer plate 21 is relatively long and generally extends to the rear of the B pillar. The interruption between the front upper side beam outer plate 21 and the rear upper side beam outer plate 22 is arranged at a position close to the rear of the automobile, mainly considering that the automobile front upper side beam needs to bear the impact force in the 25% small offset working condition from the front, so as to avoid bending of the interruption in the extreme case. The 25% small offset working condition refers to the impact force in the forward collision and the distance deviating from the center line of the vehicle accounts for 25% of the width direction of the vehicle.

[0036] Here, the variable cross-section reinforcement 3 gradually increases in cross-sectional size from the front to the rear of the automobile, and at the rear of the roof rail outer panel 2, the variable cross-section reinforcement 3 has a large cross-sectional size, and can satisfy the bending strength requirement, so the front roof rail outer panel 21 and the rear roof rail outer panel 22 can be set to be discontinuous, thereby further reducing the weight of the automobile body and reducing the cost.

[0037] As shown in Figure 4 Optionally, the variable cross-section reinforcement 3 has a triangular cross-sectional shape, two side walls of the variable cross-section reinforcement 3 are connected to the roof rail outer panel 2, and the other side wall of the variable cross-section reinforcement 3 forms the first reinforcement cavity 4 with the roof rail inner panel 1.

[0038] In the embodiment, the triangular structure has stability, and the variable cross-section reinforcement 3 and the second reinforcement cavity 31 can have a triangular cross-sectional shape, which can improve the bending strength in multiple directions such as 25% small offset collision, side collision, and top pressure compared with the existing vertical straight reinforcement plate. Here, each apex angle of the triangle can be a rounded angle or a sharp angle.

[0039] Here, the roof rail outer panel 2 has a semi-enclosed structure, and the opening is directed to the side of the roof rail inner panel 1, two side walls of the variable cross-section reinforcement 3 are connected to the top and side of the roof rail outer panel 2, and are fixed by multi-point welding, thereby increasing the connection strength and stability.

[0040] As shown in Figure 4 Optionally, the first reinforcement cavity 4 includes a transverse reinforcement cavity 41 and a vertical reinforcement cavity 42 that are in communication with each other, the transverse reinforcement cavity 41 is arranged in the width direction of the automobile, and the vertical reinforcement cavity 42 is arranged in the height direction of the automobile.

[0041] In the embodiment, the first reinforcement cavity 4 has an L-shaped structure, the transverse reinforcement cavity 41 of the first reinforcement cavity 4 is arranged in the width direction of the automobile, and the end of the transverse reinforcement cavity 41 away from the vertical reinforcement cavity 42 is directed to the roof rail outer panel 2, thereby resisting side impact and improving side collision strength; the end of the vertical reinforcement cavity 42 away from the transverse reinforcement cavity 41 is arranged in the direction of the top of the automobile, thereby resisting top pressure.

[0042] Optionally, the variable cross-section reinforcement 3 has a quadrilateral cross-sectional shape.

[0043] The existing straight reinforcing plate arranged vertically has good bending resistance for small offset collision conditions, but poor bending resistance for side collision. In the embodiment, the cross-sectional shape of the variable cross-section reinforcing member 3 can be arranged as required, and is not limited to a triangle or a quadrilateral, and is preferably a triangle. The straight flat plate is replaced by a polygonal structure to improve the bending resistance in multiple directions. It should be noted that each vertex of the cross section of the variable cross-section reinforcing member 3 can be a rounded corner or a sharp corner.

[0044] As shown in Figure 2 , 5 Optionally, the upper side beam outer plate 2 is provided with a soft structure 211 at the connection with the B pillar 5.

[0045] And / or, the upper side beam outer plate 2 is provided with a pressing groove 212 near the connection with the B pillar 5, and the pressing groove 212 is arranged along the extension direction of the upper side beam outer plate 2.

[0046] In the embodiment, the connection corners of the B pillar 5 on the front and rear sides with the upper side beam outer plate 2 are both provided with a soft structure, and the soft structure 211 can be an arc-shaped structure made of a hot-formed material and has high toughness. When the B pillar receives a side collision, the upper side beam outer plate 2 rotates around the Z axis, at which time the upper side beam outer plate 2 pulls the welding point between the upper side beam outer plate 2 and the B pillar 5. The soft structure 211 increases the stretching space, and the soft structure 211 deforms during the rotation of the upper side beam outer plate 2, so that the position of the welding point is not pulled apart, thereby improving the connection stability between the upper side beam outer plate 2 and the B pillar 5.

[0047] The upper side beam outer plate 2 is provided with a pressing groove 212 near the welding point with the B pillar 5, and the pressing groove 212 can be located on both sides of the B pillar or on one side of the B pillar 5. The pressing groove 212 also serves to increase the stretching space, and its principle is similar to that of the soft structure 211. When the upper side beam outer plate 2 receives a side collision force, the pressing grooves 212 arranged along the extension direction of the upper side beam outer plate 2 are stretched, thereby protecting the welding point from being pulled apart.

[0048] The more the number of the pressing grooves 212 or the longer the length of the soft structure 211, the better the toughness, but at the same time, the strength is reduced. On the basis of comprehensively considering the toughness and the strength, the number of the pressing grooves 212 and the length of the soft structure 211 are reasonably arranged.

[0049] As shown in Figure 2 Optionally, the upper side beam inner plate 1 includes a front upper side beam inner plate 11 and a rear upper side beam inner plate 12, and the front upper side beam inner plate 11 and the rear upper side beam inner plate 12 are welded and fixed.

[0050] In the embodiment, the upper side beam inner plate 1 has a large length and an irregular arc shape, and is designed in a split type, the front upper side beam inner plate 11 and the rear upper side beam inner plate 12 are respectively formed, and then are fixed by welding, so that the forming process can be greatly simplified.

[0051] As shown in Figure 5 Another embodiment of the present application provides a vehicle body comprising the above-mentioned upper side beam structure. The vehicle body has the same advantages as the above-mentioned upper side beam structure, and will not be repeated here.

[0052] Optionally, the vehicle body further comprises a B pillar 5, and the front upper side beam outer plate 21 of the upper side beam structure is fixed with the B pillar 5 by welding to form a half door ring structure.

[0053] In the embodiment, the B pillar 5 is arranged along the height direction of the automobile, the front upper side beam outer plate 21 is welded with the B pillar 5 as a whole, and the upper side beam outer plate 2 is welded with the variable cross-section reinforcing member 3, so that the integration degree of the whole structure is improved, the connection strength is increased, the overall bending strength and NVH performance are ensured.

[0054] Another embodiment of the present application provides an automobile comprising the above-mentioned vehicle body. The automobile has the same advantages as the above-mentioned vehicle body, and will not be repeated here.

[0055] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present application.

Claims

1. A top beam structure, characterized in that, The device includes an inner plate (1) of an upper beam, an outer plate (2) of an upper beam, and a variable cross-section reinforcement (3). The inner plate (1) of the upper beam and the outer plate (2) of the upper beam are fitted together. The variable cross-section reinforcement (3) is disposed between the inner plate (1) of the upper beam and the outer plate (2) of the upper beam. The variable cross-section reinforcement (3) is used to extend along the front-rear direction of the vehicle. The outer wall of the variable cross-section reinforcement (3) forms a first reinforcement cavity (4) with the inner plate (1) of the upper beam and the outer plate (2) of the upper beam. The interior of the variable cross-section reinforcement (3) is hollow to form a second reinforcement cavity (31). The upper beam outer plate (2) includes a front upper beam outer plate (21) and a rear upper beam outer plate (22). The front upper beam outer plate (21) and the rear upper beam outer plate (22) are spaced apart along the extension direction of the variable cross-section reinforcement member (3), and the front upper beam outer plate (21) and the rear upper beam outer plate (22) are respectively connected to the variable cross-section reinforcement member (3). A part of the side wall of the variable cross-section reinforcement member (3) is fitted and connected to the upper beam outer plate (2), and another part of the side wall of the variable cross-section reinforcement member (3) forms the first reinforcement cavity (4) between it and the upper beam inner plate (1). The cross-sectional shape of the variable cross-section reinforcement (3) is triangular. Two of the side walls of the variable cross-section reinforcement (3) are attached to the outer plate (2) of the upper beam, and the other side wall of the variable cross-section reinforcement (3) forms the first reinforcement cavity (4) between the inner plate (1) of the upper beam.

2. The upper beam structure according to claim 1, characterized in that, The cross-sectional dimensions of the variable cross-section reinforcement (3) gradually increase along the direction from the outer plate of the front upper beam (21) to the outer plate of the rear upper beam (22).

3. The upper beam structure according to claim 1, characterized in that, The first reinforcing cavity (4) includes a transverse reinforcing cavity (41) and a vertical reinforcing cavity (42) that are interconnected. The transverse reinforcing cavity (41) is arranged along the width direction of the vehicle, and the vertical reinforcing cavity (42) is arranged along the height direction of the vehicle.

4. The upper beam structure according to claim 1, characterized in that, The upper beam outer plate (2) is provided with a flexible structure (211) at the connection point with the B column (5); And / or, the outer plate of the upper beam (2) is provided with a pressure groove (212) near the connection with the B column (5), and the pressure groove (212) is provided at intervals along the extension direction of the outer plate of the upper beam (2).

5. The upper beam structure according to claim 1, characterized in that, The upper beam inner plate (1) includes a front upper beam inner plate (11) and a rear upper beam inner plate (12), and the front upper beam inner plate (11) and the rear upper beam inner plate (12) are welded and fixed.

6. A vehicle body, characterized in that, Includes the upper beam structure as described in any one of claims 1-5.

7. The vehicle body according to claim 6, characterized in that, It also includes a B-pillar (5), and the outer plate (21) of the front upper beam of the upper beam structure is welded and fixed to the B-pillar (5) to form a semi-door ring structure.

8. A car, characterized in that, Including the vehicle body as described in any one of claims 6-7.

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