Connecting structure of B-pillar lower sealing plate and doorsill beam of new energy automobile

Abstract

The connecting structure of the B-pillar lower sealing plate and the doorsill beam of the new energy automobile comprises a B-pillar lower sealing plate assembly and the doorsill beam, the B-pillar lower sealing plate assembly comprises a connecting plate and a reinforcing plate, a U-shaped groove is formed in the outer side of the connecting plate, the lower end of the connecting plate is provided with an inward folding part extending towards the back face of the U-shaped groove, the reinforcing plate is of a U-shaped structure, and the reinforcing plate is provided with an inward folding part extending towards the back face of the U-shaped groove. The reinforcing plate of the U-shaped structure is fixed in the U-shaped groove in the outer side of the connecting plate, the lower end of the reinforcing plate is provided with an outward folding part extending in the opening direction of the U-shaped structure, the inward folding part at the lower end of the connecting plate is fixedly connected to the inner side of the doorsill beam, and the outward folding part at the lower end of the reinforcing plate is fixedly connected to the outer side of the doorsill beam. The connecting structure is small in part number, easy to operate, easy to master and assemble and capable of improving the overall efficiency of a production line.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle parts assembly, in particular to a connection structure between a B-pillar lower cover plate and a door sill beam of a new energy vehicle. Background Art

[0002] With the rapid development of new energy vehicles, requirements for vehicle body safety, stability, and lightweighting are increasing. Because new energy vehicles are equipped with key components such as power batteries, their body structures must not only ensure collision safety but also consider battery protection and overall vehicle lightweighting to improve range and performance.

[0003] For example, CN111891230A discloses a connection structure between the vehicle body B-pillar and the lower vehicle body sill beam. Figure 9 and Figure 10 As shown, the structure is provided with a B-pillar outer panel 1, a B-pillar reinforcement panel 2, an upper cover panel 5, a lower cover panel 6, and a sill beam 3; the B-pillar reinforcement panel 2 is spot-welded and fixed to the inner side of the B-pillar outer panel, the upper cover panel 5 is riveted with SPR self-piercing rivets to the upper inner side of the B-pillar reinforcement panel 2, the lower end of the lower cover panel 6 is connected to the inner side of the sill beam 3 with a 90-degree bent support plate connected with blind rivets, the lower cover panel 6 is riveted with SPR self-piercing rivets to the inner side of the B-pillar reinforcement panel 2, the B-pillar outer panel 1 and the B-pillar reinforcement panel 2 are fixed to the inclined surface of the sill beam 3 with an FDS connection method, and the upper cover panel and the lower cover panel are riveted with blind rivets. However, this connection structure between the B-pillar and the lower body sill beam has the following disadvantages: the connection structure has a large number of parts, and the connection and fixing methods of each part are multiple, the production is complicated, the cost is high, and it is not conducive to improving the market competitiveness of the product. Summary of the Invention

[0004] The purpose of the present invention is to address the corresponding deficiencies in the existing technology and provide a connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle. This connection structure has a small number of parts, is simple to operate, easy to master and assemble, and improves the overall efficiency of the production line.

[0005] The objective of the present invention is achieved by adopting the following scheme: a connection structure of a B-pillar lower cover plate and a sill beam of a new energy vehicle, comprising a B-pillar lower cover plate assembly 100 and a sill beam 130, characterized in that: the B-pillar lower cover plate assembly 100 comprises a connecting plate 110 and a reinforcing plate 120, the outer side of the connecting plate 110 is provided with a U-shaped groove 114, the lower end of the connecting plate 110 is provided with an inward turning portion 111 extending toward the back side of the U-shaped groove 114, the reinforcing plate 120 is a U-shaped structure, the reinforcing plate 120 of the U-shaped structure is fixed in the U-shaped groove 114 on the outer side of the connecting plate 110, the lower end of the reinforcing plate 120 is provided with an outward turning portion 121 extending toward the opening direction of the U-shaped structure, the inward turning portion 111 at the lower end of the connecting plate 110 is fixedly connected to the inner side of the sill beam 130, and the outward turning portion 121 at the lower end of the reinforcing plate 120 is fixedly connected to the outer side of the sill beam 130.

[0006] Preferably, the inward folding portion 111 of the connecting plate 110 includes a lateral extension edge 112 and a downward extension edge 113, and the inner side of the threshold beam 130 includes a top fixing surface 131 and an inner fixing surface 132. The lateral extension edge 112 is fixed to the top fixing surface 131 on the inner side of the threshold beam 130 by screws, and the downward extension edge 113 is fixed to the inner fixing surface 132 on the inner side of the threshold beam 130 by screws.

[0007] Preferably, the outward folding portion 121 of the reinforcing plate 120 has a bevel 122 extending obliquely downward, and the outer side of the threshold beam 130 has a top fixing bevel 133, and the bevel 122 and the top fixing bevel 133 on the outer side of the threshold beam 130 are fixed by screws.

[0008] Preferably, the screw fixation is performed using self-tapping screws.

[0009] Preferably, the connection portion between the connecting plate 110 and the threshold beam 130 is coated with structural adhesive, and the connection portion between the reinforcing plate 120 and the threshold beam 130 is coated with structural adhesive.

[0010] Preferably, the reinforcing plate 120 is fixed in the U-shaped groove 114 on the outside of the connecting plate 110 by spot welding.

[0011] Preferably, the connecting plate 110 and the reinforcing plate 120 are respectively integrally formed sheet metal structures, and reinforcing ribs are provided on the connecting plate 110 and the reinforcing plate 120 .

[0012] Preferably, the door sill beam 130 is an extruded aluminum profile structure with reinforcing ribs provided inside.

[0013] The advantages of the present invention are:

[0014] 1. CN111891230A discloses a connection structure between a vehicle body B-pillar and a lower vehicle body rocker beam, wherein the B-pillar outer panel 1 is located on the outer side of the vehicle, and the B-pillar reinforcement panel 2 is located on the inner side of the vehicle; the connecting plate 110 of the present invention is located on the inner side of the vehicle, and the reinforcement panel 120 is located on the outer side of the vehicle; CN111891230A discloses a connection structure between a vehicle body B-pillar and a lower vehicle body rocker beam, wherein the lower end of the lower sealing panel 6 is connected to the inner top of the rocker beam 3 with a 90-degree bent support plate connected by a blind rivet, the B-pillar outer panel 1 and the B-pillar reinforcement panel 2 are fixed on the outer inclined surface of the rocker beam 3, the connecting plate 110 of the present invention is fixed on the surface of the top fixing surface 131 on the inner side of the rocker beam 130 close to 90 degrees, and the reinforcement panel 120 is fixed on the top fixed inclined surface 133 on the outside of the door sill beam 130; the reinforcing plate 120 of the present invention is fixed on the top fixed inclined surface 133 on the outside of the door sill beam 130. When subjected to external force (such as collision), the force can be dispersed and transmitted along the inclined surface, avoiding stress concentration in a specific right-angle area and reducing the amount of material used; the connecting plate 110 is fixed on the top fixed surface 131 on the inside of the door sill beam 130 at a surface close to 90 degrees, which can provide the connecting plate 110 with a more vertical and more stable support force. During the driving of the vehicle, especially when subjected to external forces such as side impacts, this vertical support can better resist the impact force and reduce the deformation of the outer panel.

[0015] 2. The connection structure between the lower cover plate of the B-pillar and the door sill beam of the new energy vehicle of the present invention has a small number of parts, is simple to operate, easy to master and assemble, reduces the assembly process and assembly time, reduces the production cost, and improves the overall efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 Rear view;

[0018] Figure 3 It is a structural schematic diagram of the connecting plate of the present invention;

[0019] Figure 4 for Figure 3 A-direction view;

[0020] Figure 5 It is a structural schematic diagram of the reinforcement plate of the present invention;

[0021] Figure 6 for Figure 5 B-direction view;

[0022] Figure 7 This is a schematic structural diagram of the door sill beam of the present invention;

[0023] Figure 8 It is a side view of the structure of the present invention;

[0024] Figure 9 It is a structural diagram of the prior art.

[0025] Figure 10 for Figure 9 Rear view of .

[0026] Symbols in the accompanying drawings:

[0027] B-pillar lower cover assembly 100, connecting plate 110, inward folding portion 111, laterally extending edge 112, downwardly extending edge 113, U-shaped groove 114, reinforcing plate 120, outward folding portion 121, oblique edge 122, door sill beam 130, top fixing surface 131, inner fixing surface 132, top fixing oblique surface 133, and extended edge 134. Specific embodiments

[0028] The outside and outward mentioned in this article refer to the outside of the vehicle body, and the inside and inward refer to the center of the vehicle body.

[0029] See also Figures 1 to 8A connection structure between a B-pillar lower cover plate and a sill beam of a new energy vehicle includes a B-pillar lower cover plate assembly 100 and a sill beam 130. The characteristics are as follows: the B-pillar lower cover plate assembly 100 includes a connecting plate 110 and a reinforcing plate 120. The connecting plate 110 and the reinforcing plate 120 are respectively an integrally formed sheet metal structure. The connecting plate 110 and the reinforcing plate 120 are both provided with reinforcing ribs. The outer side of the connecting plate 110 is provided with a U-shaped groove 114. The lower end of the connecting plate 110 is provided with an inward fold extending toward the back of the U-shaped groove 114. The reinforcing plate 120 is a U-shaped structure. The reinforcing plate 120 of the U-shaped structure is fixed in the U-shaped groove 114 on the outside of the connecting plate 110. In this embodiment, the reinforcing plate of the U-shaped structure and the U-shaped groove 114 on the outside of the connecting plate are fixed on both sides and the middle connection part by spot welding; the lower end of the reinforcing plate 120 is provided with an outward turning portion 121 extending in the direction of the opening of the U-shaped structure, and the inward turning portion 111 at the lower end of the connecting plate 110 is fixedly connected to the inner side of the door sill beam 130. The inward turning portion 111 of the connecting plate 110 is fixed to the inner side of the door sill beam 130. 1 includes a transversely extending edge 112 and a downwardly extending edge 113. The inner side of the threshold beam 130 includes a top fixing surface 131 and an inner fixing surface 132. The transversely extending edge 112 is fixed to the top fixing surface 131 on the inner side of the threshold beam 130 by screws, and the downwardly extending edge 113 is fixed to the inner fixing surface 132 on the inner side of the threshold beam 130 by screws. The screw fixation in this embodiment adopts self-tapping screws and is assembled using the FDS process. The outward folded portion 121 at the lower end of the reinforcing plate 120 is fixedly connected to the threshold On the outer side of the beam 130, the outward folding portion 121 of the reinforcing plate 120 has a bevel 122 extending obliquely downward, and the outer side of the threshold beam 130 has a top fixed bevel 133. The bevel 122 and the top fixed bevel 133 on the outer side of the threshold beam 130 are fixed by screws. The screw fixation in this embodiment is fixed with self-tapping screws, and the FDS process is adopted for assembly; the connection part between the connecting plate 110 and the threshold beam 130 is coated with structural glue, and the connection part between the reinforcing plate 120 and the threshold beam 130 is coated with structural glue.

[0030] The sill beam 130 is an extruded aluminum structure with internal reinforcement ribs. The side of the sill beam 130 facing the interior of the vehicle is provided with an extended edge 134, which is the matching surface of the vehicle's front cabin integral casting and the rear floor integral casting.

[0031] The present invention uses a robot to assemble the screws using the FDS process, thereby ensuring the anti-collision strength of the B-pillar, and applies structural adhesive to the connection between the B-pillar lower cover assembly and the door sill beam to improve the sealing and corrosion resistance.

[0032] Through test detection, the cross tensile and shear forces of the B-pillar lower cover plate and the door sill beam FDS are as follows:

[0033]

[0034] This structure meets the collision requirements in the vehicle collision test.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A connection structure between a B-pillar lower cover plate and a sill beam of a new energy vehicle, comprising a B-pillar lower cover plate assembly (100) and a sill beam (130), characterized in that: The B-pillar lower cover plate assembly (100) includes a connecting plate (110) and a reinforcing plate (120), wherein the outer side of the connecting plate (110) is provided with a U-shaped groove (114), and the lower end of the connecting plate (110) is provided with an inward folding portion (111) extending toward the back of the U-shaped groove (114), and the reinforcing plate (120) is a U-shaped structure. The reinforcing plate (120) of the U-shaped structure is fixed in the U-shaped groove (114) on the outer side of the connecting plate (110), and the lower end of the reinforcing plate (120) is provided with an outward folding portion (121) extending toward the opening direction of the U-shaped structure, and the inward folding portion (111) at the lower end of the connecting plate (110) is fixedly connected to the inner side of the door sill beam (130), and the outward folding portion (121) at the lower end of the reinforcing plate (120) is fixedly connected to the outer side of the door sill beam (130).

2. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1, characterized in that: The inwardly folded portion (111) of the connecting plate (110) includes a transversely extending edge (112) and a downwardly extending edge (113); the inner side of the threshold beam (130) includes a top fixing surface (131) and an inner fixing surface (132); the transversely extending edge (112) and the top fixing surface (131) on the inner side of the threshold beam (130) are fixed by screws; and the downwardly extending edge (113) and the inner fixing surface (132) on the inner side of the threshold beam (130) are fixed by screws.

3. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1 is characterized by: The outward folding portion (121) of the reinforcing plate (120) has an oblique edge (122) extending obliquely downward, and the outer side of the threshold beam (130) has a top fixed oblique surface (133), and the oblique edge (122) and the top fixed oblique surface (133) on the outer side of the threshold beam (130) are fixed by screws.

4. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 2 or 3, characterized in that: The screw fixation adopts self-tapping screw fixation.

5. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1 is characterized by: The connection portion between the connecting plate (110) and the threshold beam (130) is coated with structural adhesive, and the connection portion between the reinforcing plate (120) and the threshold beam (130) is coated with structural adhesive.

6. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1 is characterized by: The reinforcing plate (120) is fixed in the U-shaped groove (114) outside the connecting plate (110) by spot welding.

7. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1, characterized in that: The connecting plate (110) and the reinforcing plate (120) are respectively integrally formed sheet metal structures, and reinforcing ribs are provided on the connecting plate (110) and the reinforcing plate (120).

8. The connection structure between the lower cover plate of the B-pillar and the door sill beam of a new energy vehicle according to claim 1, characterized in that: The threshold beam (130) is an extruded aluminum profile structure with reinforcing ribs provided inside.

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