CN119160287A - Door sill reinforcement beam and vehicle - Google Patents

Abstract

The invention provides a threshold reinforcement beam and a vehicle. The threshold reinforcement beam comprises a main beam body and a buffer body coated outside the main beam body, wherein the buffer body adopts a multi-cavity structure, and all cavities on the buffer body are densely distributed in the length and height directions of the threshold reinforcement beam. The multi-cavity buffer body is arranged outside the main beam body, so that the structural performance and the buffer performance of the threshold reinforcement beam can be effectively improved, the cavities are densely arranged in the length direction and the width direction of the threshold reinforcement beam, and when the threshold reinforcement beam is arranged in the inner cavity of the threshold beam, collision impact from the side part of a vehicle can be effectively relieved due to the shrinkage deformation of the cavities on the buffer body, thereby being beneficial to improving the structural performance and the buffer effect of the threshold beam.

Description

Threshold stiffening beam and vehicle

Technical Field

The invention relates to the technical field of vehicle body structures, in particular to a threshold stiffening beam. In addition, the invention also relates to a vehicle.

Background

With the development of technology, the safety performance requirements of vehicles are increasingly high. In the process of developing the vehicle type, the analysis design is needed to be carried out on the vehicle body structure so as to reduce the injury to the passengers in the accident.

The threshold beam structure plays a vital role in side collision of the automobile, and when the side collision occurs, as the two sides of the automobile body are not provided with buffering and energy absorbing parts like a front cabin and a rear cabin, the high impact energy caused by the side collision is relieved by adopting a reinforced design of the threshold beam.

In the prior art, a threshold reinforcement beam is usually arranged in an inner cavity of a threshold beam, the threshold beam is usually formed by buckling a side wall reinforcing plate at the bottom of a side wall assembly and a threshold beam inner plate, an inner cavity of the threshold beam is formed between the side wall reinforcing plate and the threshold beam inner plate, and the threshold reinforcement beam is arranged in the inner cavity to play roles in improving the structural strength of the threshold beam and buffering and energy absorbing effects. Meanwhile, the impact force caused by side collision comes from the width direction of the vehicle, and the insufficient performance of the threshold reinforcement beam still easily causes the bending deformation of the threshold beam, thereby endangering the safety of drivers and passengers. Therefore, the automobile threshold beam reinforcing structure with excellent design structure is necessary, and the safety performance of the side face of the automobile body can be effectively improved, so that good protection is formed for the impact from the side face of the automobile body.

Disclosure of Invention

In view of the above, the present invention is directed to a sill reinforcing beam for improving structural performance and cushioning effect of the sill beam.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a threshold stiffening beam comprises a main beam body and a buffer body coated outside the main beam body;

the buffer body adopts the multicavity structure, each cavity on the buffer body is in the length of threshold stiffening beam and the dense arrangement in direction of height.

Further, a cavity is formed in the main beam body.

Further, the cross section of the main beam body is rectangular, and the buffer body comprises an upper buffer body coated on the top of the main beam body, a side buffer body coated on one side of the main beam body and a lower buffer body coated on the bottom of the main beam body.

Further, the projection of the upper buffer body in the length direction of the threshold reinforcement beam is trapezoid, and/or the projection of the side buffer body and the lower buffer body in the length direction of the threshold reinforcement beam is rectangular, and/or the side buffer body is provided with at least two layers of chambers which are arranged up and down.

Further, the buffer body is formed by criss-cross plate bodies, and each cavity is formed by surrounding adjacent plate bodies.

Further, each of the chambers is arranged to extend in the width direction of the rocker reinforcement beam.

Further, at least one end of each cavity is opened.

Further, the main beam body is made of a continuous fiber reinforced composite material, and/or the buffer body is integrally formed by nylon materials.

Compared with the prior art, the invention has the following advantages:

The multi-cavity buffer body is arranged outside the main beam body, so that the structural performance and the buffer performance of the threshold reinforcement beam can be effectively improved, the cavities are densely arranged in the length direction and the width direction of the threshold reinforcement beam, and when the threshold reinforcement beam is arranged in the inner cavity of the threshold beam, collision impact from the side part of a vehicle can be effectively relieved due to the shrinkage deformation of the cavities on the buffer body, thereby being beneficial to improving the structural performance and the buffer effect of the threshold beam.

In addition, the main beam body and the buffer body are prepared from composite nylon materials, so that any random structural member can be conveniently manufactured through an injection molding process, and then the structural adhesive is used for effectively bonding with the sheet metal part of the threshold beam. The composite material not only ensures the structural performance and the buffering performance of the threshold stiffening beam, but also has higher light weight level, which is about 40 percent lighter than the steel threshold stiffening beam and about 20 percent lighter than the aluminum threshold stiffening beam.

Another object of the present invention is to provide a vehicle, in which the interior of the sill beam of the vehicle is hollow to form an inner cavity, and the inner cavity is provided with the sill reinforcement beam of the present invention.

Further, at least one side of the main beam body facing the outside of the vehicle is coated with the buffer body, and the buffer body is adhered to the inner wall of the inner cavity through epoxy resin structure adhesive.

The vehicle of the invention has the technical advantages of the threshold reinforcement beam. In addition, based on the side wall reinforcing plate which is firstly acted on one side outside the threshold beam when the impact from the side part of the vehicle is acted on, at least one side of the main beam body facing the outside of the vehicle (namely, one side facing the side wall reinforcing plate) is provided with the buffer body, and the buffer body is directly adhered to the inner wall of the buffer body (namely, the side wall reinforcing plate), so that the impact force born by the side wall reinforcing plate can be effectively absorbed, the buffer performance of the threshold reinforcing beam is better exerted, and the deformation degree of the threshold beam caused by the impact is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention, wherein the words of front and back, top and bottom, etc. are used to indicate relative position and are not intended to limit the invention unduly. In the drawings:

fig. 1 is a schematic view of the overall structure of a sill reinforcement beam according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a sill reinforcement beam according to an embodiment of the present invention at another view angle;

Fig. 3 is a schematic diagram of a split structure of a threshold reinforcement beam according to an embodiment of the invention;

fig. 4 is a top view of a sill reinforcement according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the portion A-A of FIG. 4;

fig. 6 is a schematic view of an overall structure of a sill reinforcing beam according to a second embodiment of the present invention;

FIG. 7 is a schematic view illustrating an inner structure of a threshold beam according to a second embodiment of the present invention;

fig. 8 is a schematic diagram of the split structure of the components shown in fig. 6.

Reference numerals illustrate:

1. A threshold beam; 10, a threshold beam inner plate, 11, a side wall reinforcing plate, 12, an inner cavity;

2. the door sill reinforcing beam, 20 parts of main beam body, 200 parts of cavity, 21 parts of buffer body, 211 parts of upper buffer body, 212 parts of side buffer body, 213 parts of lower buffer body, 22 parts of cavity;

30. Column A, column 31 and column B.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be noted that, if terms indicating an orientation or positional relationship such as "upper, lower, left, right, front, rear, inner, outer" or the like are used, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed or operated in a specific orientation, and thus should not be construed as limiting the present invention. In the vehicle described in the present invention, the terms of the directions such as "up, down, left, right, front, and rear" used in the embodiments are defined with reference to the up-down direction (also referred to as the height direction), the left-right direction (also referred to as the width direction), and the front-rear direction (also referred to as the length direction) of the vehicle. In particular, as shown in the drawings, the X direction is the front-rear direction of the vehicle, wherein the side pointed by the arrow is the "front", and vice versa. The Y direction is the left-right direction of the vehicle, wherein the side pointed by the arrow is "left", and vice versa. The Z direction is the up-down direction of the vehicle, wherein the side pointed by the arrow is "up", and vice versa. The "inner and outer" are defined with reference to the contour of the corresponding component, for example, "inner" and "outer" are defined with reference to the contour of the vehicle, with "inner" being the side of the contour of the vehicle closer to the vehicle middle, and "outer" being the opposite.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection may be a fixed connection, a detachable connection, or an integral connection, may be a mechanical connection, or an electrical connection, may be a direct connection, may be an indirect connection through an intermediate medium, or may be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a sill reinforcing beam which can improve structural performance and cushioning effect of a sill beam 1, an exemplary structure of which is shown in fig. 1 and 2.

The threshold reinforcement beam includes a main beam 20 and a buffer 21 covering the main beam 20. Wherein, the buffer body 21 adopts a multi-cavity structure, and each cavity 22 on the buffer body 21 is densely distributed along the length and height directions of the threshold stiffening beam 2.

Specifically, the main beam 20 of the present embodiment preferably adopts a hollow structure, and has a cavity 200 therein. The adoption of the hollow structure is beneficial to reducing the dead weight of the main girder body 20, so that the lightweight design level of the threshold stiffening girder 2 is improved. Preferably, the cavity 200 of the main beam 20 is directly surrounded by the outer wall of the main beam 20, forming a single cavity 200. Meanwhile, the thickness of the outer wall of the main girder 20 is preferably controlled to be 1mm to 3 mm. The thickness of the outer wall of the main beam body 20 is 1 mm-3 mm, so that the weight and the material consumption of the main beam body 20 can be effectively reduced on the basis of ensuring the reasonable structural strength of the main beam body 20, for example, the thickness of the outer wall of the main beam body 20 can be 1mm, 2mm or 3mm, and is preferably 2mm.

It should be noted that the materials of the main beam 20 and the buffer 21 may be flexibly selected, for example, steel, aluminum, or plastic. In this embodiment, the main beam 20 is made of a continuous fiber reinforced composite material, the buffer 21 is made of a nylon material, and the main beam 20 and the buffer 21 can be injection molded by an integral molding process. The main beam body 20 is made of a continuous fiber reinforced composite material, takes thermoplastic (nylon) or thermosetting (polyurethane) resin as a matrix and continuous fibers as a reinforcing material, and can be manufactured into a single-cavity or multi-cavity structure beam body product by adopting an integral injection molding process, so that the main beam body has good structural performance and light weight level.

The main beam body 20 and the buffer body 21 are prepared from composite nylon materials, so that any random structural member can be conveniently manufactured through an injection molding process, and then the structural adhesive is used for effectively bonding with the sheet metal part of the threshold beam 1. The composite material not only ensures the structural performance and buffering performance of the threshold reinforcement beam 2, but also has higher light weight level, which is about 40% lighter than the steel threshold reinforcement beam 2 and about 20% lighter than the aluminum threshold reinforcement beam 2.

As shown in fig. 3,4 and 5, the cross section of the main beam 20 of the present embodiment is rectangular, and the buffer body 21 includes an upper buffer body 211 coated on the top of the main beam 20, a side buffer body 212 coated on one side of the main beam 20, and a lower buffer body 213 coated on the bottom of the main beam 20. The main beam body 20 adopts a cuboid structure shape, which is convenient for the processing and forming of the main beam body 20 and the cladding arrangement of the buffer bodies 21 outside the main beam body 20, wherein the lower buffer body 213 can be directly arranged on the bottom surface of the main beam body 20, the upper buffer body 211 can be directly arranged on the top surface of the main beam body 20, the side buffer bodies 212 are directly arranged on the side surface of the main beam body 20, and each buffer body 21 can be fixedly connected on the main beam body 20 in a bonding or welding mode. The buffer body 21 is arranged outside the main beam body 20 in a semi-surrounding mode, so that the cross section size of the threshold reinforcement beam 2 can be effectively increased, and the impact resistance and the buffer performance of the threshold reinforcement beam 2 in the transverse direction can be well enhanced.

Based on the above arrangement, it is preferable that the cross-sectional shape of each buffer body 21 be designed differently depending on the position. In this embodiment, the projection of the upper cushion body 211 in the length direction of the threshold reinforcement beam 2 is trapezoidal, that is, the surface of the upper cushion body 211 facing the vehicle exterior (that is, the same side as the side of the side cushion body 212 facing away from the main beam body 20) adopts a form of tilting from bottom to top. The side cushion body 212 and the lower cushion body 213 are rectangular in projection in the longitudinal direction of the rocker reinforcement beam 2. In such a design, the load bearing area of the upper cushion body 211 increases gradually in the width direction of the rocker reinforcement beam 2 (i.e., the width direction of the vehicle), so that the cushioning property increases gradually during the impact bearing process, and the entire cushion body 21 has a better cushioning effect.

Further, in the case where the height dimension of the side cushion 212 is large, it is preferable to arrange at least two layers of the chambers 22 up and down in the height direction of the side cushion 212.

As shown in fig. 3, the buffer body 21 of the present embodiment is constructed of crisscrossed plate bodies, and each chamber 22 is surrounded by adjacent plate bodies. Meanwhile, each of the chambers 22 is arranged to extend in the width direction of the rocker reinforcement beam 2.

Further, each chamber 22 is preferably provided with at least one end open. In this embodiment, each chamber 22 on the side buffer 212 is open at one end, and each opening is disposed toward one side of the main beam 20. Each chamber 22 on the upper buffer body 211 and the lower buffer body 213 is also open at one end, and the direction of each opening is opposite to the direction of each chamber 22 on the side buffer body 212. The buffer body 21 is conveniently integrally injection molded and ejected by adopting a mode that one end is opened.

The buffer body 21 of the present embodiment is formed by criss-cross plate bodies, so that adjacent plate bodies can enclose each cavity 22 on the buffer body 21, and the processing structure forming of the buffer body 21 is also facilitated. Under the condition that the cavity 22 is formed by the separation and the enclosure of the plate bodies, the cross section of the cavity 22 is rectangular, the cavity 22 is in a cuboid shape, the length direction of the cavity 22 is set to be consistent with the width direction of the threshold reinforcement beam 2, and the shock resistance of the buffer body 21 in the transverse direction of the threshold reinforcement beam 2 can be effectively improved, so that the structural performance and the buffering effect of the threshold reinforcement beam 2 are further improved.

The thickness of the buffer 21 can be set reasonably, and in this embodiment, the thickness of the plate is 1.5 mm-3.5 mm. The thickness of the plate body of the buffer body 21 is controlled to be 1.5 mm-3.5 mm, so that reasonable structural strength of the buffer body 21 can be ensured, and the light weight effect of the buffer body 21 is improved. For example, the thickness of the buffer 21 may be set to 1.5mm, 2mm, 2.5mm or 3.5mm, and preferably set to 2.5mm.

In summary, the threshold reinforcement beam of the present embodiment can form a good basic skeleton by arranging the main beam 20, and improve the structural strength of the threshold beam 1, and the buffer body 21 with a multi-cavity structure is arranged outside the main beam 20, so that the structural performance and the buffer performance of the threshold reinforcement beam 2 can be effectively improved, and the chambers 22 are densely arranged in the length direction and the width direction of the threshold reinforcement beam 2, so that when the threshold reinforcement beam 2 is arranged in the inner cavity 12 of the threshold beam 1, the collision impact from the side of the vehicle can be effectively relieved due to the crumple deformation of the chambers 22 on the buffer body 21, thereby being beneficial to improving the structural performance and the buffer effect of the threshold beam 1.

In the scheme of the embodiment, the continuous fiber reinforced composite material profile structure is designed in the whole length direction of the threshold reinforcement beam 2, so that small offset collision of a vehicle can be well coped with, and the arrangement form and the direction of each cavity 22 in the buffer body 21 can improve the energy absorption effect of the buffer body 21 facing side collision. The threshold stiffening beam 2 is made of composite nylon material, and the purpose of reducing the weight by about 20% is achieved compared with the existing common aluminum alloy extrusion.

Example two

The present embodiment relates to a vehicle in which a cavity 12 is formed in a rocker 1 of the vehicle, and a rocker reinforcement 2 provided in the first embodiment is provided in the cavity 12. An exemplary structure of the threshold beam 1 is shown in fig. 6, 7 and 8.

As shown in fig. 6, the side frame of the present embodiment includes an a pillar 30, a B pillar 31, and a rocker 1 connected between the bottoms of the a pillar 30 and the B pillar 31, the rocker 1 being formed by buckling a rocker inner panel 10 located on the inside and a side gusset 11 located on the outside, thereby forming an inner cavity 12 of the rocker 1 therebetween.

Specifically, at least the side of the main beam body 20 facing the outside of the vehicle should be covered with the buffer body 21, and preferably, the buffer body 21 is adhered to the inner wall of the inner cavity 12 by an epoxy resin structure adhesive, wherein the thickness of the adhesive layer is preferably controlled to be about 2 mm.

Based on the fact that the impact from the side of the vehicle will first act on the side wall reinforcing plate 11 on the outer side of the threshold beam 1, the buffer body 21 is arranged on the side of the main beam body 20 facing the outside of the vehicle (i.e. the side wall reinforcing plate 11), and the buffer body 21 is directly adhered to the inner wall of the buffer body 21 (i.e. the side wall reinforcing plate 11), the impact force received by the side wall reinforcing plate 11 can be effectively absorbed, so that the buffer performance of the threshold beam 2 can be better exerted, and the degree of deformation of the threshold beam 1 due to the impact can be reduced. For one side of the sill beam inner plate 10, the sill reinforcement beam 2 and the sill beam inner plate 10 can be directly abutted to improve the stability of the sill reinforcement beam 2 in the inner cavity 12 of the sill beam 1, and of course, a certain buffer gap can be reserved between the sill reinforcement beam 2 and the sill beam inner plate 10 to increase the overall buffer performance of the sill beam 1.

The buffer body 21 made of nylon resin materials is bonded with the side wall reinforcing plates 11 through structural adhesives, so that the stability of the arrangement of the threshold reinforcing beam 2 can be guaranteed, the threshold reinforcing beam 2 can better participate in collision energy absorption and force transmission through the structure, and the safety of side collision of an automobile is improved.

Meanwhile, in the threshold beam 1 of the embodiment, the threshold stiffening beam 2 is formed by combining a composite nylon material with a structural adhesive, so that the cost and the weight are low, the weight of the threshold stiffening beam 2 can be effectively reduced on the premise of ensuring the safety, the rigidity, the strength and other performances of the whole vehicle, various clamps required by welding are reduced, and the processing process beat of the whole threshold beam 1 is improved. Nylon and sheet metal are combined through high-strength epoxy resin structural adhesive to form a stable structural cavity structure, and the bending resistance and energy absorption effects of the threshold reinforcing beam 2 can be remarkably improved, so that injuries to passengers caused by side collision of a vehicle are reduced.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. A threshold stiffening beam, characterized in that:

comprises a main beam body (20) and a buffer body (21) coated outside the main beam body (20);

the buffer body (21) adopts a multi-cavity structure, and all cavities (22) on the buffer body (21) are densely distributed in the length and height directions of the threshold reinforcement beam (2).

2. The threshold reinforcement beam of claim 1, wherein:

the main beam body (20) is internally provided with a cavity (200).

3. The threshold reinforcement beam of claim 1, wherein:

the cross section of the main beam body (20) is rectangular, and the buffer body (21) comprises an upper buffer body (211) coated on the top of the main beam body (20), a side buffer body (212) coated on one side of the main beam body (20) and a lower buffer body (213) coated on the bottom of the main beam body (20).

4. A threshold reinforcement beam according to claim 3, characterized in that:

The projection of the upper buffer body (211) in the length direction of the threshold reinforcement beam (2) is trapezoid, and/or the projection of the side buffer body (212) and the lower buffer body (213) in the length direction of the threshold reinforcement beam (2) is rectangular, and/or the side buffer body (212) is provided with at least two layers of chambers (22) which are arranged up and down.

5. The threshold reinforcement beam of claim 1, wherein:

the buffer bodies (21) are constructed by criss-cross plate bodies, and each cavity (22) is formed by surrounding adjacent plate bodies.

6. The sill reinforcement as in claim 5, wherein:

Each of the chambers (22) is arranged to extend in the width direction of the rocker reinforcement beam (2).

7. The threshold reinforcement beam of claim 6, wherein:

each chamber (22) is provided with at least one opening.

8. The sill reinforcement as in any of claims 1 to 7, wherein:

The main beam body (20) is made of a continuous fiber reinforced composite material, and/or the buffer body (21) is integrally formed by nylon materials.

9. A vehicle, characterized in that:

The vehicle door sill beam (1) is internally hollow and provided with an inner cavity (12);

The inner cavity (12) is provided with a threshold reinforcement beam according to any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that:

at least one side of the main beam body (20) facing the outside of the vehicle is coated with the buffer body (21), and the buffer body (21) is adhered to the inner wall of the inner cavity (12) through epoxy resin structure adhesive.