JP4706930B2 - Vehicle side body structure - Google Patents

Description

The present invention relates to a side body structure of a vehicle, and more particularly to a side body structure of a vehicle having a side sill extending in the longitudinal direction of the vehicle body.
About.

  It is known to provide an inner panel and an outer panel on a vehicle body, thereby forming a side sill having a closed cross section. A reinforcement for reinforcing the side sill is usually provided inside the side sill. Further, it is known that the inner panel and the outer panel each have a flange at the door opening, and join the flanges.

  Usually, the upper edge of the reinforcement is sandwiched and joined to each panel by the flange of such a door opening, while the lower edge is sandwiched and joined by the lower edge of each panel. In this way, a closed cross section is formed.

  Here, as shown in FIG. 9 showing a conventional vehicle body 100, a triangular portion 108 is usually formed at the rear and lower portion of the door. In the triangular portion 108, the side sill 112 is spaced considerably downward from the joint flange of the door opening. In addition, it is effective to use a high-tensile member (high-tensile steel plate) to increase the strength of the reinforcement. In that case, it is difficult to take a complicated shape due to the difficulty of formability. It has a shape that extends almost straight.

  Therefore, in this triangular portion 108, the reinforcement cannot be welded by the flange of the door opening, and as a result, the side sill 112 is not provided below such a triangular portion 108, and the vehicle body front and rear are not provided. The direction only extended to a position as shown in FIG.

  On the other hand, in Patent Document 1, the reinforcement is fixed by extending the reinforcement to the lower part of the triangular portion and applying a patch member between the reinforcement and the wheel house. It has been devised.

JP 2005-161891 A

  In recent years, vehicles having a long wheelbase and a very small rear overhang have been developed. In such a vehicle, when a rear-end collision occurs from the rear of the vehicle (at the time of rear-end collision), there is a concern that the vehicle body will be crushed and it will be easy to bite into the passenger compartment, and the fuel tank and fuel pipe may be damaged. It was happening. Here, at the time of a rear collision, the rear wheel is normally pushed forward until it comes into contact with the side sill. Therefore, as described above, when the reinforcement is not provided in the triangular portion, the rear wheel bites forward greatly. Therefore, the rear-end vehicle or the like greatly bites into the host vehicle, and as a result, there is a great risk of damage to the fuel system device such as the fuel tank. Further, in the structure as in Patent Document 1, the patch member itself may bite into the vehicle body.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a side body structure of a vehicle that can reduce the deformation amount of the vehicle body at the time of a rear collision. .

In order to achieve the above object, according to the present invention, there is provided a side body structure of a vehicle having a side sill extending in the longitudinal direction of the vehicle body, wherein the side sill is disposed inward in the vehicle width direction from the outer panel. An inner panel and a reinforcement disposed between the outer panel and the inner panel, and an extension portion extending rearward in the vehicle body front-rear direction is provided at the rear end of the reinforcement. The extension portion is characterized in that an upper edge portion thereof is spaced outward in the vehicle width direction with respect to the vehicle body side member, and a vehicular auxiliary machine is disposed inward of the extension portion in the vehicle width direction.
In the present invention configured as described above, the rear end portion of the reinforcement is provided with an extension portion extending rearward in the longitudinal direction of the vehicle body, and the upper edge portion of the extension portion with respect to the vehicle body side member is provided. The vehicle body is separated outward in the vehicle width direction, so that the amount of deformation of the vehicle body is reduced, for example, during a rear-end collision while preventing the generation of noise due to interference between the extension and the vehicle body side member during normal driving I can do it.

In the present invention, it is preferable that the side sill further includes an auxiliary reinforcement disposed at the front end portion of the extension portion and having an upper end portion and a lower end portion sandwiched between the outer panel and the inner panel, respectively. The auxiliary reinforcement has a bulging portion that bulges in the vehicle width direction, and the extension portion of the reinforcement is joined to the auxiliary reinforcement through at least the bulging portion.
In the present invention configured as described above, the rear door opening has an auxiliary reinforcement which is disposed at the front end portion of the extension portion and whose upper end portion and lower end portion are respectively sandwiched between the outer panel and the inner panel. Even when the triangular panel portion is formed in the portion and it is difficult to join the reinforcement to the vehicle body side member, the strength and rigidity of the extension portion of the reinforcement can be ensured. In particular, the auxiliary reinforcement has a bulging portion that bulges in the vehicle width direction, and the extension portion of the reinforcement is joined to the auxiliary reinforcement through at least the bulging portion, so that it is more reliable. In addition, the strength and rigidity of the extension portion of the reinforcement can be ensured. As a result, for example, even if a forward load is applied to the reinforcement at the time of a rear impact, the load input to the extension part separated from the vehicle body side member is directly received by the auxiliary reinforcement, and the received load is further assisted. Since it can be dispersed by reinforcement, the deformation amount of the vehicle body at the time of rear-end collision can be reduced more reliably.

Further, in the present invention, preferably, a rear wheel is disposed on the rear side of the side sill, and the bulging portion extends in the vehicle width direction toward an extension line passing through the center of the rear wheel in the vehicle width direction and extending forward. Bulges.
In the present invention configured as described above, for example, even when a forward load is applied to the reinforcement and a moment force is generated due to the rear wheel moving forward at the time of a rear collision, the center of the rear wheel in the vehicle width direction is Since the bulging portion bulging toward the side effectively receives the moment force, deformation of the reinforcement 12 is suppressed, and as a result, the deformation amount of the vehicle body at the time of the rear collision can be reduced more reliably.

In the present invention, preferably, the bulging portion of the auxiliary reinforcement extends in the vertical direction of the vehicle body.
In the present invention configured as described above, rigidity and strength can be ensured even against torsional force applied to the reinforcement.

In the present invention, preferably, the reinforcement has a bead at the rear end.
In the present invention configured as described above, the rigidity of the reinforcement can be more reliably improved, and as a result, the collapse of the closed section can be suppressed.

  According to the side body structure of a vehicle according to the present invention, the amount of deformation of the vehicle body can be reduced during a rear-end collision.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a side view of a side part of a vehicle body according to the present embodiment as viewed from the right side, and FIG. 2 is a side view similar to FIG. 1 in which an outer panel is not shown in the side part of the vehicle body of FIG. .
First, as shown in FIGS. 1 and 2, the vehicle body 1 of the present embodiment includes an inner panel 2 and an outer panel 4. The panels 2 and 4 are joined to each other by spot welding the flange portions 2 a and 4 a formed along the periphery of the door opening 6.

Similarly, the lower edge 2b of the inner panel 2 and the lower edge 4b of the outer panel are joined together by spot welding to form the side sill 10.
A triangular panel portion 8 is formed at a portion below and behind the door opening 6, and a fuel tank is disposed inward in the vehicle width direction of the portion extending from the front portion of the wheel house outer panel 7 to the triangular panel portion 8. 11 is arranged. Reference numeral 3 denotes a rear wheel, and a portion indicated by reference numeral 5 is a floor panel constituting a floor of a passenger compartment.

  Next, the structure of the side sill 10 will be described with reference to FIGS. 3 is an enlarged perspective view of the lower portion of the rear door opening 6 in FIG. 2 and a partially enlarged perspective view seen from the right front side and the upper side. FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3. In FIG. 3, the outer panel 4 is not shown as in FIG. Further, FIG. 6 shows the outer panel and the inner panel on the vehicle body side as viewed from the inner side of the vehicle body and the diagonally upper front side for explaining that the outer panel to which the side sill reinforcement or the like is previously attached is attached to the inner panel. FIG. 7 is a partially enlarged perspective view showing an enlarged side sill reinforcement and auxiliary side sill reinforcement in the rear and lower part of the outer panel shown in FIG.

As shown in FIGS. 3 and 4, a closed section is formed by the inner panel 2 and the outer panel 4, and this closed section is configured as a side sill that serves to reinforce the vehicle body.
Inside the closed cross section, a side sill reinforcement 12 and an auxiliary side sill reinforcement 14 for increasing the rigidity and strength of the side sill 10 are provided.

  The side sill reinforcement 12 according to the present embodiment includes a main body portion 12a that extends in the longitudinal direction of the vehicle body and an extension portion 12b that extends at a lower portion of the triangular panel portion 8 described above. As shown in FIG. 2 and FIG. 5 to be described later, in the present embodiment, the extension portion 12b is located adjacent to the front portion 7a of the wheel house outer panel 7 in the front-rear direction of the vehicle body from the rear end portion of the main body portion 12a. Extends backwards. The side sill reinforcement 12 and the auxiliary side sill reinforcement 14 are formed of high-tensile steel plates.

First, the structure of the main body 12a of the side sill reinforcement 12 will be described.
Here, as shown in FIG. 6, the side sill reinforcement 12 and the auxiliary side sill reinforcement 14 are fixed to the outer panel 4 by welding in advance. The outer panel 4, the side sill reinforcement 12 and the auxiliary side sill reinforcement 14 integrated with each other in the side sill body portion 10a are formed by a plurality of spot hitting points 16 (see FIG. 3) from the outer side of the outer panel 4. Welded to panel 2. Moreover, in this embodiment, as shown in FIG. 4, the wheel house outer panel 7 is also welded together in the side sill main body part 10a by such spot welding.

As shown in FIG. 3, the side sill reinforcement 12 is also fixed to the inner panel 2 via an auxiliary side sill reinforcement 14.
Here, as shown in FIGS. 5 and 7, the auxiliary side sill reinforcement 14 is formed with a bulging portion 14 a bulging outward in the vehicle width direction. More specifically, the bulging portion 14a extends in the vertical direction of the vehicle body and is formed so as to bulge toward an extension line C (see FIG. 5) of the central axis in the vehicle width direction of the rear wheel 3.

The side sill reinforcement 12 is welded to the bulging portion 14 a by spot hitting points 18, and is also welded to the auxiliary side sill reinforcement 14 by the plurality of spot hitting points 16 described above. Further, the lower part of the auxiliary side sill reinforcement 14 is also welded to the inner panel 2 and the outer panel 4 by spot welding 16.
By the welded structure as described above, the side sill reinforcement 12 and the auxiliary side sill reinforcement 14 are sandwiched between the inner panel 2 and the outer panel 4 in the side sill body portion 10a so as to increase the rigidity and strength of the side sill 10. It has become.

Next, the structure of the extended portion 12b of the side sill reinforcement 12 will be described.
In the side sill extension 10b, the lower edge 12c (see FIGS. 2, 5, and 6) of the side sill reinforcement 12 is fixed so as to be sandwiched between the outer panel 4 and the inner panel 6 by the spot welding 16 described above. Has been.

On the other hand, as shown in FIG. 5, the upper edge portion 12d of the side sill reinforcement extension portion 12b is formed at a position spaced outward from the vehicle body side member such as the wheel house outer 7 and the inner panel panel 2 in the vehicle width direction. , A free edge (a free end that is not constrained or contacted by other members).
The upper edge portion 10d is formed from the position adjacent to the vehicle body front portion 7a of the wheel house outer panel 7 from the portion of the welding spot 18 between the side sill reinforcement 12 and the auxiliary side sill reinforcement 14, that is, the auxiliary side sill rain. It extends to the portion of the bulging portion 14 a formed in the force 14.

As shown in FIGS. 5 and 8, a bead portion 12 e is formed at the rear end portion of the extension portion 12 a of the side sill reinforcement 12. FIG. 8 is a partially enlarged perspective view of a part of the extended portion 12b of the side sill reinforcement 12 and a part of the auxiliary side sill reinforcement 14 when viewed obliquely from the front and above the vehicle body.
As shown in FIGS. 5 and 8, the bead portion 12 e is formed so as to narrow the rear edge of the side sill reinforcement 12 in the longitudinal direction of the vehicle body. That is, the step is provided such that the area of the closed cross section of the side sill reinforcement 12 in the bead portion 12e is smaller than the area of the closed cross section of the other part of the side sill reinforcement 12.

Main effects of the present embodiment will be described.
First, in this embodiment, the extension part 12b is provided in the side sill reinforcement 12, and the side sill reinforcement 12 is extended to the position adjacent to the front part 7a of the wheel house outer panel 7. Therefore, it is possible to prevent the rear wheel 3 from biting into the front side of the vehicle body, in particular, the cabin side at the time of a rear collision. That is, the deformation amount of the vehicle body at the time of the rear impact can be reduced compared to the case where the side sill reinforcement 112 is extended only to the position as shown in FIG. As a result, the fuel tanks 11 disposed between the rear wheels 3 or the side sills 10 in the vehicle width direction are not easily damaged.
Further, the upper edge portion 12d of the side sill reinforcement extension portion 12b is formed so as to be separated from other members, particularly members on the inner side of the vehicle body (for example, the inner panel 2 and the wheel house outer panel 7). During traveling, the extension portion 12b and the members on the inner side of the vehicle body do not contact or interfere with each other to generate abnormal noise.

  Furthermore, in this embodiment, since the auxiliary side sill reinforcement 14 is provided at the front end of the side sill reinforcement extension 12b, a triangular panel 8 is formed in the door opening 6 of the rear door. Even if it is difficult to weld the side sill reinforcement 12 to the inner panel 2, the strength and rigidity of the side sill reinforcement extension 12b can be ensured.

In particular, the auxiliary side sill reinforcement 14 is formed with a bulging portion 14a to enhance rigidity. And since the side sill reinforcement 12 is welded to this bulging part 14a (spot welding 18), the intensity | strength and rigidity of the side sill reinforcement extension part 12b can be ensured more reliably. That is, even when a rearward load 3 is applied to the side sill reinforcement 12 via the wheel house outer panel 7 in the event of a rear impact, the load is applied to the side sill reinforcement 14 by the auxiliary side sill reinforcement 14. Since the load received directly can be dispersed by the auxiliary reinforcement, the deformation amount of the vehicle body at the time of the rear collision can be reduced.
Further, by forming the bulging portion 14a extending in the vertical direction of the vehicle body in the auxiliary side sill reinforcement 14, the rigidity of the side sill 10 against torsion caused by the vertical load can be improved.

Further, since the bulging portion 14a bulges toward an extension line C (refer to FIG. 5) of the central axis in the vehicle width direction of the rear wheel 3, the rear wheel 3 is side sill rain via the wheel house outer panel 7. Even if the moment force is generated in the side sill reinforcement 12 due to contact with the rear end portion of the force 12, the bulging portion 14 a bulging toward the center in the vehicle width direction of the rear wheel exerts the moment force. Since it is effectively received, the deformation of the side sill reinforcement 12 can be suppressed, and the deformation amount of the vehicle body at the time of the rear impact can be reduced more reliably.
Furthermore, since the bead portion 12e is formed at the rear end portion of the side sill reinforcement 12, the rigidity of the side sill reinforcement 12 can be improved more reliably. Can be suppressed.

It is the side view which looked at the side part of the vehicle body by this embodiment from the right side. FIG. 2 is a side view similar to FIG. 1 in which an outer panel is not shown in the side portion of the vehicle body in FIG. 1. FIG. 3 is a partially enlarged perspective view in which a lower part of the rear door opening 6 in FIG. 2 is enlarged and obliquely seen from the front right and above, and an outer panel 4 is not shown. It is sectional drawing of the side sill part seen along the III-III line of FIG. It is sectional drawing seen along the VV line of FIG. In FIG. 3, the outer panel 4 is not shown as in FIG. It is the perspective view which looked at the outer panel and the inner panel of the vehicle body side, etc. from the vehicle body inner side and diagonally forward upper side for demonstrating attaching the outer panel to which the side sill reinforcement etc. were previously attached to an inner panel. FIG. 6 is a partially enlarged perspective view showing an enlarged side sill reinforcement and auxiliary side sill reinforcement in the rear and lower part of the outer panel shown in FIG. 5. FIG. 4 is a partially enlarged perspective view of a part of an extension part 12b of the side sill reinforcement 12 and a part of the auxiliary side sill reinforcement 14 when viewed obliquely from the front and above the vehicle body. It is the side view which looked at the side part of the vehicle body by the prior art for demonstrating the side sill reinforcement of the vehicle body by a prior art from the right side.

Explanation of symbols

1 Vehicle 2 Inner panel 3 Wheel (rear wheel)
4 Outer panel 6 Door opening 7 Wheel house outer panel 8 Triangular panel 10 Side sill 11 Fuel tank 12 Side sill reinforcement 12b Side sill reinforcement extension 12c Extension lower edge 12d Extension upper edge 12e Bead part 14 Auxiliary side sill reinforcement 14a Swelling part 16, 18 Spot dot

Claims (5)

A side body structure of a vehicle having a side sill extending in a longitudinal direction of the vehicle body,
The side sill has an outer panel, an inner panel disposed inward in the vehicle width direction from the outer panel, and a reinforcement disposed between the outer panel and the inner panel,
The rear end of this reinforcement is provided with an extension that extends rearward in the longitudinal direction of the vehicle body.
The extended portion has an upper edge that is spaced outward in the vehicle width direction with respect to the vehicle body side member,
A side body structure of a vehicle, wherein a vehicle auxiliary machine is disposed inward in the vehicle width direction of the extension portion. The side sill further includes an auxiliary reinforcement that is disposed at the front side end of the extension and has an upper end and a lower end sandwiched between the outer panel and the inner panel, respectively.
This auxiliary reinforcement has a bulging portion that bulges in the vehicle width direction,
The side part body structure of the vehicle according to claim 1, wherein the extension part of the reinforcement is joined to the auxiliary reinforcement through at least the bulging part. A rear wheel is arranged on the rear side of the side sill,
The side body structure of a vehicle according to claim 1, wherein the bulging portion bulges in the vehicle width direction toward an extension line passing through a center of the rear wheel in the vehicle width direction and extending forward.   The side body structure of a vehicle according to claim 2 or 3, wherein the bulging portion of the auxiliary reinforcement extends in a vertical direction of the vehicle body.   The side body structure of a vehicle according to any one of claims 1 to 4, wherein the reinforcement has a bead at a rear end thereof.

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