JP4930823B2 - Connecting structure of vehicle side body and underbody - Google Patents

Description

  The present invention relates to a coupling structure of a side body and an underbody of a vehicle.

8 to 10 show a coupling structure of the side body 1 and the underbody 2 in a conventional vehicle. In this vehicle, as shown in FIG. 9, a corner gusset 3 is welded to the underbody 2 in advance, and this corner gusset 3 is welded to the inner panel 1a of the side body 1 as shown in FIG. .
JP-A-9-286355

By the way, in the joint structure of the conventional side body 1 and the underbody 2, the corner gusset 3 and the side body 1 are overlapped while being aligned with each other in the height direction and the vehicle front-rear direction when they are welded. It is necessary to weld in a combined state, and furthermore, since the mating portion has a closed cross section, it must be joined by arc welding such as bolts and nuts or CO ₂ welding, and the welding work is complicated.

  The present invention solves the above-described problems, facilitates the welding work of the side body and the underbody, and further enhances the rigidity against the impact load from the side of the vehicle acting on the side body. An object of the present invention is to provide a coupling structure.

According to the present invention, the side body of the vehicle body is provided with a protruding portion that protrudes inward in the width direction of the vehicle body and closes the tip to form a closed cross section, and a closing wall that closes the tip is disposed at the tip of the protruding portion. In addition, a welding work hole is formed in the projecting portion that is on the side of the vehicle with respect to the closing wall, an opening is formed at the end of the cross member of the underbody having a closed cross section, and the opening of the cross member is formed. The protruding portion is inserted, the closing wall is positioned in the cross member of the underbody , and the welding operation is performed between the welding operation hole and the closing wall by using the welding operation hole. The projecting portion and the cross member positioned inward of the vehicle with respect to the service hole are welded to each other, and the side body is coupled to the cross member of the underbody.
Further, the present invention resides in that the upper surface of the cross member having a closed cross section is constituted by a floor panel.
Furthermore, the present invention is such that the portion of the protruding portion inserted into the end opening of the cross member of the underbody has a shape substantially parallel to the left-right direction of the vehicle.
Further, the present invention provides a reinforcement provided outside the side body inner panel, forms a hole for welding work in the reinforcement, and curves the side body side end of the protruding portion upward. A curved portion is overlapped with the side body inner panel, and they are welded to each other through the welding work hole.
Furthermore, the present invention resides in that an end portion of the frame is positioned on a closed wall that closes the tip of the protruding portion, and the end portion of the frame is joined to the cross member.

The side body of the vehicle body is provided with a protruding portion that protrudes inward in the width direction of the vehicle body and has a closed cross section to form a closed cross section, and an opening is formed at the end of the cross body of the underbody having the closed cross section. By inserting the protruding portion into the opening of the member and connecting the side body to the cross member of the underbody, the side body and the cross member can be temporarily assembled at the horizontal portion, so that the dimensional accuracy and assembly of each part They can be combined without paying attention to accuracy, improving productivity.
Further, according to the present invention, since the closed sections of the projecting portion and the cross member are made continuous, the connection between the underbody and the side body is strengthened, the rigidity of the vehicle body can be increased, Since the impact load is sufficiently transmitted to the underbody, the deformation of the vehicle body can be reduced with respect to the impact load.
Furthermore, by configuring the upper surface of the cross member having a closed cross section with a floor panel, the accuracy of the assembly position of the floor panel and the side body can be improved.
Further, according to the present invention, the impact load from the side surface of the vehicle is sufficiently transmitted to the floor panel, so that the deformation of the vehicle body can be reduced with respect to the impact load.
Furthermore, by disposing the closing wall for closing the tip at the tip of the protrusion, the tip of the protrusion is closed, so that the close wall works as a bulkhead of the cross member, and the rigidity of the cross member is improved.
Furthermore, a welding work hole is formed in the projecting part, and the projecting part and the cross member located inside the vehicle are welded to each other through the welding work hole, whereby the tip of the projecting part is closed. Therefore, the rigidity can be ensured even if the work hole is opened, and the spot welding work can be performed through the work hole, so that the welding work is facilitated.
Further, a reinforcement is attached to the outside of the side body inner, a hole for welding work is formed in the reinforcement, and a side body side end portion of the protruding portion is bent upward to form a curved portion, By superimposing the curved portion on the side body inner panel and welding them together through the welding work hole, spot welding work can be performed through the work hole, and the work becomes easy.
Furthermore, by positioning the end of the frame on the wall that closes the tip of the protruding portion and joining the end of the frame to the cross member, input from the frame arranged before or after the cross member can be applied to the cross member. Transmission to the opposite side is possible, and the rigidity of the entire vehicle body is improved.

Hereinafter, a connecting structure of a vehicle side body and an underbody according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a rear portion of a side body applied to a structure for joining a side body and an underbody of a vehicle according to the present invention, and FIG. 2 is a view before the side body shown in FIG. 1 is assembled to the underbody. FIG. 3 is a perspective view showing the state where the side body and the underbody shown in FIG. 2 are assembled, with the floor panel omitted, and FIG. 4 is a vehicle according to the present invention. The perspective view which looked at the state which joined the frame to the cross member in the joint structure of the side body and the underbody from the bottom, FIG. 5 is the VV sectional view taken on the line in FIG. 2, FIG. FIG. 7 is a cross-sectional view of the main part showing a state in which the cross member is joined, and FIG.

FIG. 1 shows a side body 10. As shown in FIG. 5, the side body 10 has a reinforcement 13 interposed between a side body inner panel 11 and a side body outer panel 12. A projecting portion 16 is formed at the lower end portion of the side body 10 so as to project toward the inner side in the vehicle width direction with respect to the side body 10. The protrusion 16 has a corner gusset panel 14 on the upper side of the vehicle, a tail skirt extension panel 15 on the front and lower sides of the vehicle, and a back pillar outer panel 18 on the rear side of the vehicle. It is formed in a cylindrical shape.
The fixing of the protrusion 16 to the side body 10 by welding is as follows.

  Below the protrusion 16, one end of the tail skirt extension panel 15 is welded to the lower end of the side body outer panel 12 and the lower end of the reinforcement 13. As shown in FIG. 7, the front end portion of the tail skirt extension panel 15 is welded to the side body inner panel 11 and the reinforcement 13 on the front side of the protruding portion 16. On the rear side of the protruding portion 16, the side end portion of the back pillar outer panel 18 is welded to the side body outer panel 12 and the reinforcement 13 by welding w5 and w6. On the upper side of the protrusion 16, one end of the corner gusset panel 14 is welded to the side body inner panel 11 (see FIG. 5). That is, the fixing of the protrusion 16 to the side body 10 is fixed by welding to the reinforcement 13 that is a reinforcing member that is provided long in the vertical direction in the back pillar of the vehicle on the front and rear and the lower side thereof. With these welded structures, the protrusion 16 can be firmly fixed to the side body 10 by welding.

Further, as shown in FIGS. 5 to 7, the protrusion 16 reaches the corner gusset panel 14 and the back pillar outer panel 18 so that the other end of the tail skirt extension panel 15 closes the end opening. A front end portion 16 inward of the vehicle in the width direction is coupled to the corner gusset panel 14 and the back pillar outer panel 18 to close the opening portion via a closing wall 15a.
As shown in FIG. 4, the underbody 20 has a frame 25 welded to the lower surface of the floor panel 23 along the vehicle front-rear direction. The frame 25 includes a cross member 24 and an end bracket 25 a of the frame 25. To the front surface of the cross member 24 (tail skirt inner panel 21). As shown in FIG. 7, the closing wall 15a is disposed at the joining position of the frame 25 and the cross member 24 in the left-right direction of the vehicle.

In this side body 10, the corner gusset panel 14 and the tail skirt extension panel 15 are welded w2 to form a protrusion 16 to create a part (protrusion), and the part is connected to the side body inner panel 11 and Welding w1, w3, and w4 are performed on the reinforcement 13 (see FIGS. 5 to 7). At that time, the welding w3 between the corner gusset panel 14 of the protruding portion 16 and the side body inner panel 11 is performed through a welding work hole 17 formed in the reinforcement 13 (see FIG. 5).
Next, the back pillar outer panel 18 is welded w5 to the side body outer panel 12, and the side body outer panel 12 is welded w6 to the reinforcement 13 on the side body inner panel 11 side which is assembled as described above to create the side body 10 (FIG. 7). reference).

On the other hand, in the underbody 20, as shown in FIG. 2, a floor panel 23 is disposed on the upper edges of the tail skirt inner panel 21 and the tas skirt outer panel 22 as shown in FIG. A member 24 is configured.
As shown in FIG. 4, this underbody 20 is made by welding the tail skirt inner panel 21 of the cross member 24, the end bracket 25a of the frame 25, the bumper bracket 26, etc. It is created by welding the floor panel 23.

  Then, as shown in FIG. 5, the side body 10 has its protruding portion 16 inserted into the end opening 24 a of the cross member 24, and the corner gusset panel 14 is placed on the floor constituting the cross member 24 as shown in FIG. 6. The side body 10 is joined to the underbody 20 by welding w7 to the panel 23 and welding the tail skirt extension panel 15 to the lower surface of the cross member 24.

  Further, as shown in FIG. 7, on the front side of the vehicle, the tail skirt extension panel 15 that constitutes the protruding portion 16 is welded to the front wall of the tail skirt inner panel 21 that constitutes the cross member 24, and the rear side of the vehicle. Then, the side body 10 is joined to the underbody 20 by welding the back pillar outer panel 18 constituting the protruding portion 16 to the tas skirt outer panel 22 constituting the cross member 24. Here, the corner gusset panel 14 is formed in a shape that curves upward as it goes to the side of the vehicle, and the tail skirt extension panel 15 is formed in a shape that curves forward as it goes to the side of the vehicle. However, the portion of the protruding portion 16 inserted into the end opening 24a of the cross member 24 has a shape substantially parallel to the left-right direction of the vehicle. Further, as shown in FIG. 5, the tip end portion of the protruding portion 16 is caught because the edge of the corner gusset panel 14 is bent and the tail skirt extension panel 15 is bent with a relatively large radius. It is easy to insert.

  In addition, welding of the corner gusset panel 14 and the floor panel 23 and welding of the tail skirt extension panel 15 and the lower surface of the cross member 24 are performed in a hole 27 formed in the back pillar outer panel 18, for example, a ventilation hole inside and outside the vehicle interior. Is done through.

  According to the above embodiment, the side body 10 of the vehicle body is provided with the protruding portion 16 that protrudes inward in the width direction of the vehicle body and closes the tip to form a closed section, and the cross of the underbody 20 having the closed section. An opening 24 a is formed at the end of the member 24, the protrusion 16 is inserted into the opening 24 a of the cross member 24, and the side body 10 is coupled to the cross member 24 of the underbody 20. Since the cross member 24 can be temporarily assembled at the horizontal portion, the parts can be joined without paying attention to the dimensional accuracy and assembly accuracy of the respective parts, thereby improving productivity.

Further, according to the present invention, since the closed sections of the projecting portion 16 and the cross member 24 are made continuous, the connection between the underbody 20 and the side body 10 becomes strong, and the rigidity of the vehicle body can be increased. Since the impact load from the side of the vehicle is sufficiently transmitted to the underbody 20, the deformation of the vehicle body can be reduced with respect to the impact load. Since the rigidity of the vehicle body at the part is improved, the running stability and durability of the vehicle are improved. In particular, this part is a joining part of the back pillar and tail end cross member at the rearmost part of the vehicle, and further, since the large opening for the back door is formed, the rigidity of the vehicle body can be improved more effectively.
By configuring the upper surface of the cross member 24 having a closed cross section with the floor panel 23, the accuracy of the assembly position of the floor panel 23 and the side body 10 can be improved.

In addition, according to the present invention, the impact load from the side surface of the vehicle is sufficiently transmitted to the floor panel 23 and the cross member 24, so that the deformation of the vehicle body can be reduced with respect to the impact load.
By disposing the closing wall 15a for closing the tip at the tip of the protruding portion 16, the tip of the protruding portion 16 is closed, so that the closing wall 15a functions as a bulkhead of the cross member 24 and the rigidity of the cross member 24 is increased. Will improve.
Since a welding work hole 27 is formed in the protrusion 16 and the protrusion 16 and the cross member 24 located inside the vehicle can be welded through the welding work hole 27 by spot welding work. Welding work becomes easy. Further, since the tip of the protruding portion 16 is closed, the rigidity of the protruding portion 16 can be ensured even if the work hole 27 is opened, and the welding operation is facilitated.

A reinforcement 13 is attached to the outside of the side body inner panel 11, a welding work hole 17 is formed in the reinforcement 13, and a side body 10 side end portion of the protruding portion 16 is curved upward. Forming a portion, overlapping the curved portion on the side body inner panel 11, and welding them together via the welding work hole 17, thereby enabling spot welding work through the work hole 17, Becomes easier.
The end of the frame 25 is positioned on the wall 15 a that closes the tip of the protrusion 16, and the end of the frame 25 is joined to the cross member 24, thereby inputting from the frame disposed before or after the cross member 24. Can be transmitted to the opposite side of the cross member 24, and the rigidity of the entire vehicle body is improved.

  In the above embodiment, the back pillar lower portion constituting the opening of the back door at the rear part of the vehicle body and the tail skirt are coupled, but for example, the center pillar and the cross member are coupled in the vehicle width direction. The present invention can be applied to any floor structure that has a structure in which a member that protrudes inward in the vehicle width direction from the side body is inserted into and coupled to a floor member that has cylindrical openings at both ends. . Needless to say, the present invention can be implemented with appropriate modifications within a range not changing the gist of the present invention.

It is the perspective view which showed the rear part of the side body applied to the coupling structure of the side body and underbody of the vehicle which concerns on this invention. It is the perspective view which showed the state before attaching the side body shown in FIG. 1 to an underbody. It is the perspective view which abbreviate | omitted and showed the state which assembled | attached the side body and underbody which were shown in FIG. It is the perspective view which looked at the state where the frame was joined to the cross member in the joint structure of the side body and underbody of the vehicle concerning the present invention from the lower part. It is the VV sectional view taken on the line in FIG. FIG. 6 is a cross-sectional view of a main part showing a state in which the side body and the cross member in FIG. 5 are coupled together. It is the VII-VII line cross section in FIG. It is the perspective view which showed the coupling | bonding structure of the side body of a conventional vehicle, and the underbody, and showed the state before attaching a side body to an underbody. It is the IV-IV sectional view taken on the line which showed the state which couple | bonded the side body and underbody in FIG. FIG. 10 is a cross-sectional view showing a joined state of the part in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Side body 11 Side body inner panel 12 Side body outer panel 13 Reinforce 14 Corner gusset panel 15a Closing wall 15 Tail skirt extension panel 16 Protruding part 17 hole (hole for welding work)
18 Back pillar outer panel 20 Underbody 21 Tail skirt inner panel 22 Tail skirt outer panel 23 Floor panel 24 Cross member 25 Frame 25a Bracket 26 Bumper bracket 27 Hole (ventilation hole)

Claims (5)

Provided on the side body of the vehicle body is a protruding portion that protrudes inward in the width direction of the vehicle body and that closes the tip to form a closed cross section, and a closing wall that closes the tip is disposed at the tip of the protruding portion. A welding work hole is formed in the protruding portion that is on the side of the vehicle with respect to the closed wall, an opening is formed at the end of the cross member of the underbody having a closed cross section, and the protruding portion is formed in the opening of the cross member. And inserting the closed wall into the cross member of the underbody and using the welding work hole between the welding work hole and the closing wall and more than the welding work hole. A vehicle side body / underbody coupling structure, wherein the projecting portion and the cross member positioned inside the vehicle are welded together to couple the side body to the crossbody of the underbody.   The joint structure of a vehicle side body and an underbody according to claim 1, wherein an upper surface of the cross member having a closed cross section is constituted by a floor panel.   3. The side body and under of a vehicle according to claim 1 or 2, wherein a portion of the projecting portion inserted into an end opening of a cross member of the under body is substantially parallel to the left-right direction of the vehicle. The combined structure of the body. A reinforcement is attached to the outside of the side body inner panel, a hole for welding work is formed in the reinforcement, a side body side end portion of the protruding portion is bent upward to form a curved portion, The side body of the vehicle according to any one of claims 1 to 3 , wherein a curved portion is overlapped with the side body inner panel and they are welded to each other through the welding hole. And underbody combined structure. 5. The vehicle side body and underbody according to claim 3 , wherein an end portion of the frame is positioned on a closed wall that closes a tip of the protruding portion, and the end portion of the frame is joined to the cross member. Bonding structure.

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