JP2007203893A - Vehicle body side part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rationally improve stiffness to bending compression of each portion of a locker corresponding to bending components acting on the locker in offset head-on collision, and to rationally receive a collision load inputted to the locker. <P>SOLUTION: In a vehicle fore-and-aft direction front side portion of the locker 10, a front sde reinforcement 14 (a front side high stiffness portion) is provided at an upper side corner portion on an inside in a vehicular width direction, so that stiffness to the bending compression at the upper side corner portion can be improved. In a vehicle fore-and-aft direction rear side portion of the locker 10, a rear side reinforcement 16 (a rear side high stiffness portion) is provided at a lower side corner portion on an inside in the vehicular width direction, so that the stiffness to the bending compression at the lower side corner portion can be improved. The stiffness to the bending compression of each portion of the locker 10 is improved corresponding to bending components M1, M2, M3 acting on the locker 10 in the offset head-on collision, and a collision load F inputted to the locker 10 can be rationally received. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle body side structure for a vehicle with a frame.

In the conventional vehicle body side structure, a rocker is formed by joining a rocker inner panel and a rocker outer panel, and a structure in which a reinforcement is provided only near the rocker outer panel in the rocker (see Patent Document 1). .
JP-A-9-66859

  However, in a vehicle with a large frame such as a full-size pickup truck or SUV used in North America, for example, in order to reasonably receive a collision load input at the time of an offset frontal collision, the reinforce It was desired not only to provide a reinforcement but also to provide further reinforcement.

  In consideration of the above facts, the present invention rationally increases the rigidity against bending compression of each part of the rocker corresponding to the bending component acting on the rocker at the time of offset frontal collision, and the collision load input to the rocker. The purpose is to be able to reasonably receive.

  When a vehicle with a frame collides with the front of the offset and a large amount of collision load is input to one of the rockers, the rocker mounted on the body frame is supported on the front side in the vehicle longitudinal direction, and the upward bending component and the vehicle width direction An inward bending component acts and bending compression occurs at the upper corner on the inner side in the vehicle width direction. Further, a downward bending component and a bending component inward in the vehicle width direction act on the rear side portion of the rocker in the vehicle longitudinal direction, and bending compression occurs in the lower corner portion in the vehicle width direction.

  Accordingly, the invention of claim 1 extends in the vehicle longitudinal direction on the vehicle body side portion on the vehicle body frame, and includes a front high-rigidity portion in the upper corner in the vehicle width direction on the vehicle front-rear direction front side portion. A rocker having a rear high-rigidity portion at a lower corner portion on the inner side in the vehicle width direction at the rear side portion is characterized.

  In the vehicle body side part structure according to claim 1, since the front high-rigidity portion is provided at the upper corner portion on the inner side in the vehicle width direction on the front side portion of the rocker in the vehicle longitudinal direction, the rigidity against bending compression at the upper corner portion is provided. Can be increased. Further, since the rear high rigidity portion is provided at the lower corner portion on the inner side in the vehicle width direction at the rear side portion of the rocker in the vehicle longitudinal direction, the rigidity against bending compression at the lower corner portion can be increased. For this reason, it is possible to rationally increase the rigidity against bending compression of each part of the rocker corresponding to the bending component acting on the rocker at the time of offset frontal collision, and reasonably receive the collision load input to the rocker It is.

  According to a second aspect of the present invention, in the vehicle body side part structure according to the first aspect, a cross member extends in the vehicle width direction between the left and right rockers at a substantially central portion in the front-rear direction of the vehicle body. The rear end portion and the front end portion of the rear high-rigidity portion are arranged at positions that overlap the cross member in the vehicle width direction.

  In the vehicle body side structure according to claim 2, the rear end portion of the front high-rigidity portion and the front end portion of the rear high-rigidity portion are disposed at a position overlapping the cross member in the vehicle width direction, and the front high-rigidity portion and The rear high-rigidity portion is disposed in an appropriate range in each of the vehicle front-rear direction front side portion and the vehicle front-rear direction rear side portion. For this reason, it is possible to rationally increase the rigidity against bending compression of each part of the rocker corresponding to the bending component acting on the rocker at the time of offset frontal collision, and to receive the collision load input to the rocker reasonably. is there.

  According to a third aspect of the present invention, in the vehicle body side structure according to the first or second aspect, the front high-rigidity portion is obtained by reinforcing the upper corner portion with front reinforcement, and the rear high-rigidity portion. The part is characterized in that the lower corner is reinforced by rear reinforcement.

  In the vehicle body side part structure according to claim 3, since the upper corner portion on the inner side in the vehicle width direction of the rocker is reinforced by the front reinforcement to form the front high rigidity portion, the rigidity against bending compression at the upper corner portion is improved. ing. In addition, since the lower corner portion on the inner side in the vehicle width direction of the rocker is reinforced by the rear reinforcement to constitute the rear high rigidity portion, the rigidity against bending compression at the lower corner portion is improved. That is, in the vehicle body side part structure according to claim 3, by providing the reinforcement at appropriate positions corresponding to the bending component acting on the rocker at the time of the offset frontal collision, the vehicle front-rear direction front side part and the vehicle front-rear direction rear side part are provided. It is possible to more reasonably increase the rigidity against bending compression.

  According to a fourth aspect of the present invention, in the vehicle body side part structure according to any one of the first to third aspects, the ridgeline of the lower corner is inclined so as to descend toward the rear of the vehicle. It is characterized by that.

  In the vehicle body side part structure according to claim 4, since the ridge line of the lower corner is inclined so as to descend toward the rear of the vehicle, the front-rear direction of the vehicle is reduced while reducing the weight of the front-rear direction of the vehicle in the rocker. The rigidity with respect to bending compression of the lower corner part in a rear side part can be improved.

  As described above, according to the vehicle body side part structure according to claim 1 of the present invention, the rigidity against bending compression of each part of the rocker is rationalized corresponding to the bending component acting on the rocker at the time of offset frontal collision. Therefore, an excellent effect can be obtained in that the collision load input to the rocker can be reasonably received.

  According to the vehicle body side structure according to claim 2, the rigidity against bending compression of each part of the rocker is rationally increased in response to the bending component acting on the rocker at the time of the offset frontal collision, and input to the rocker. An excellent effect that the collision load can be reasonably received is obtained.

  According to the vehicle body side part structure according to claim 3, by providing the reinforcement at appropriate positions corresponding to the bending component acting on the rocker at the time of the offset frontal collision, the vehicle front-rear direction front side part and the vehicle front-rear direction rear side part are provided. It is possible to obtain an excellent effect that the rigidity against bending compression can be increased more reasonably.

  According to the vehicle body side part structure according to claim 4, it is possible to increase the rigidity against bending compression of the lower corner portion in the vehicle longitudinal direction rear side portion while reducing the weight of the vehicle longitudinal direction front side portion in the rocker. Effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
In FIG. 1, the vehicle body side structure S1 according to the present embodiment is a vehicle body side structure that takes into account offset frontal collision in a large frame vehicle such as a full-size pickup truck or SUV used in North America, for example. There is a rocker 10, a rocker reinforcement 12, a front reinforcement 14 as an example of a front high-rigidity part, and a rear reinforcement 16 as an example of a rear high-rigidity part.

  1 and 3, the rocker 10 is configured by joining a rocker inner panel 18 and a rocker outer panel 20, and in the vehicle longitudinal direction at the left and right sides of the vehicle body 22 on the vehicle body frame 44 (FIG. 4). It is extended. In FIG. 4, the rocker 10 is disposed on the vehicle body frame 44 via mounts 46 at the front end portion and the rear end portion thereof.

  The rocker inner panel 18 is formed in a substantially cross-sectional hat shape that protrudes inward in the vehicle width direction, and the rocker outer panel 20 is formed in a substantially cross-sectional hat shape that protrudes outward in the vehicle width direction, and the upper and lower flanges 18F, 20F. With the flange 12F of the rocker reinforcement 12 sandwiched therebetween, the flanges 18F and 20F are joined by, for example, spot welding to form a closed cross section.

  The rocker reinforcement 12 is a reinforcing member that extends in the vehicle front-rear direction in the rocker 10 and is disposed closer to the rocker outer panel 20. For example, a rocker reinforcement 12 that is thicker than the rocker outer panel 20 is moved outward in the vehicle width direction. It is formed in a substantially cross-sectional hat shape that is convex. The rocker reinforcement 12 is joined to the rocker inner panel 18 and the rocker outer panel 20 while being sandwiched between the flanges 18F and 20F of the rocker inner panel 18 and the rocker outer panel 20 at the flange 12F.

  As shown in FIG. 1, a lower portion of the A pillar 26 is joined to the front end of the rocker 10, and a cross member 28 extends in the vehicle width direction between the left and right rockers 10 at the lower position of the A pillar 26. It is installed. The lower part of the B pillar 24 is joined to the center part of the rocker 10 in the longitudinal direction of the vehicle, and a cross member 30 extends in the vehicle width direction between the left and right rockers 10 at the lower part of the B pillar 24. Yes. Further, as shown in FIG. 5, a cross member 32 extends between the rear end portions of the left and right rockers 10 in the vehicle width direction.

  As shown in FIGS. 1 and 2, the front reinforcement 14 is an upper corner portion 18 </ b> A of the rocker inner panel 18 that is mainly disposed on the front side of the B pillar 24 of the vehicle body 22 as an example of a front side portion in the vehicle front-rear direction. It is the reinforcement member which reinforces. Specifically, the front reinforcement 14 is configured so that, for example, along the ceiling surface 18S from the upper region of the inner wall surface 18W constituting the upper corner portion 18A of the rocker inner panel 18 in the cross section of the rocker 10 shown in FIG. The cross section is substantially L-shaped, and is spot-welded, for example, to the rocker inner panel 18. As shown in FIGS. 1 and 2, the front reinforcement 14 extends to the front side of the B pillar 24, for example, to the front end where the A pillar 26 and the cross member 28 of the rocker 10 are joined. Yes.

  The rear reinforcement 16 is a reinforcing member for reinforcing the lower corner portion 18B of the rocker inner panel 18 that is mainly disposed on the rear side of the B pillar 24, which is an example of a rear side portion in the vehicle front-rear direction. Specifically, the rear reinforcement 16 extends along the floor surface 18D from the lower region of the inner wall surface 18W constituting the lower corner portion 18B of the rocker inner panel 18 in the cross section of the rocker 10 shown in FIG. For example, it is formed in a substantially L-shaped cross section and is spot welded to the rocker inner panel 18, for example. As shown in FIGS. 1 and 2, the rear reinforcement 16 extends to the rear side of the B pillar 24 to the vicinity of the rear end where, for example, the C pillar 48 of the rocker 10 is joined. Yes.

  The rear end portion 14R of the front reinforcement 14 and the front end portion 16F of the rear reinforcement 16 are disposed at a position overlapping the cross member 30 in the vehicle width direction, for example, the B pillar 24 also overlaps in the vehicle width direction. . As shown in FIG. 2, the rear end portion 14 </ b> R of the front side reinforcement 14 is disposed at a position overlapping the front end portion 16 </ b> F of the rear side reinforcement 16 in the vehicle vertical direction.

  That is, the upper corner 18A of the rocker inner panel 18 in front of the B pillar 24 is reinforced by the front reinforcement 14, and the rear corner of the rocker inner panel 18 is lower in the lower corner than the rear reinforcement 16. The part 18B is reinforced. As shown in FIGS. 1 to 3, both the upper corner portion 18A and the lower corner portion 18B of the rocker inner panel 18 are positioned at the vehicle body longitudinal direction position that overlaps the cross member 30 in the vehicle width direction of the rocker 10. However, it is in a state reinforced by the front reinforcement 14 and the rear reinforcement 16.

  In FIG. 5, a front side member 34 extending forward of the vehicle is joined to the left and right sides of the cross member 28, and a cross member 36 is extended between the left and right front side members 34 in the vehicle width direction. A rear side member 38 extending rearward of the vehicle is joined to the left and right sides of the cross member 32, and a cross member 40 is extended between the left and right rear side members 38 in the vehicle width direction.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 4, for example, when the left side of a vehicle with a frame collides with an offset front, the front portion of the vehicle body 22 on the vehicle body frame 44 is deformed and pitched in a forward tilting direction. When the vehicle body 22 is deformed, the position of the front wheel 42 is retracted, and a collision load F is input from the front wheel 42 to the vicinity of the A pillar 26 of the vehicle body 22 and the front end portion of the rocker 10.

  At this time, when viewed from the side of the vehicle, the front end portion of the rocker 10 where the A pillar 26 is located has an upward bending component that separates the front end portion from the vehicle body frame 44, that is, a clockwise bending component M1 in the drawing. Works. On the other hand, a downward bending component that lowers the rear end portion by the inertial force of the vehicle body frame 44, that is, a clockwise bending component M3 in the drawing, acts on the rear end portion of the rocker 10 where the C pillar 48 is located. To do. Since the substantially central portion of the rocker 10 where the B pillar 24 is located is not mounted on the vehicle body frame 44, the counterclockwise bending component M2 acts under the influence of the bending components M1 and M3.

  As schematically shown in FIG. 4, the rocker 10 tends to deform into an approximately S shape by these bending components M1, M2, and M3, and the upper portion of the rocker 10 in front of the B pillar 24 is subjected to bending compression. In the rocker 10 on the rear side of the B pillar 24, the lower side portion is subjected to bending compression.

  On the other hand, when the collision load F is input, as schematically shown in FIG. 5, in the plan view of the vehicle body, the front end of the rocker 10 has a bending component inward in the vehicle width direction, that is, the right side in the drawing. A bending component M4 around is acting, and a bending component inward in the vehicle width direction, that is, a counterclockwise bending component M5 on the drawing, acts on the rear end portion of the rocker 10 in the same manner. Due to the bending components M4 and M5, the inner side in the vehicle width direction of the rocker 10 is subjected to bending compression as a whole.

  In consideration of the bending compression of each part of the rocker 10 as described above, in the vehicle body side structure S1 according to the present embodiment, as shown in FIGS. 1 to 3, the rocker inner panel 18 mainly includes the B pillar 24. On the front side, the upper corner 18 </ b> A of the rocker inner panel 18 is reinforced by the front reinforcement 14, and on the rear side of the B pillar 24, the lower corner 18 </ b> B is reinforced by the rear reinforcement 16. In other words, the front reinforcement 14 and the rear reinforcement 16 reinforce the portion that receives bending compression in the rocker 10 to increase the rigidity against bending compression. Since the front reinforcement 14 and the rear reinforcement 16 are not passed through all the front and rear sides of the B pillar 24, it is possible to make the rocker 10 lightweight and highly rigid.

  Since the rear end portion 14R of the front reinforcement 14 and the front end portion 16F of the rear reinforcement 16 are disposed at positions overlapping the cross member 30 and the B pillar 24 in the vehicle width direction, the bending rigidity (with respect to the bending component M2) ( 4) and the bending rigidity (FIG. 5) with respect to the bending components M4 and M5 are both increased, and the vehicle body deformation at the position of the B pillar 24 can be further suppressed.

  Thus, in the vehicle body side structure S1, the front reinforcement 14 and the rear reinforcement 16 are not arranged over the entire length of the rocker 10, but are bending components M1 and M2 that act on the rocker 10 at the time of an offset frontal collision. , M3, M4, and M5, the front reinforcement 14 and the rear reinforcement 16 are respectively disposed in appropriate ranges of the rocker 10, thereby suppressing the weight increase of the vehicle body 22, and the rocker 10 The rigidity with respect to bending compression at each part can be increased reasonably. In addition, even if this is a vehicle with a large frame such as a full-size pickup truck or SUV used in North America, for example, the collision load F input to the rocker 10 is reasonably received, and FIGS. It is possible to suppress the deformation of the vehicle body 22 as shown in FIG.

  Although the front reinforcement 14 and the rear reinforcement 16 are separate reinforcing members, the present invention is not limited to this, and may be an integral member that is continuous with the cross member 30 in the vehicle width direction in a plan view of the vehicle body. . Further, in FIGS. 1 and 2, the rear end portion of the rear reinforcement 16 is drawn so as to terminate in the middle of the rocker 10, but the present invention is not limited to this, as shown in FIGS. 4 and 5. The rocker 10 may extend to the vicinity of the rear end.

[Second Embodiment]
In FIG. 6, in the vehicle body side part structure S2 according to the present embodiment, the ridge line 18L of the lower corner 18B of the rocker inner panel 18 is inclined so as to descend toward the rear of the vehicle.

  Specifically, as shown in FIG. 7 (A), in the region of the rocker inner panel 18 on the front side of the B pillar 24, which is an example of the front side portion of the vehicle body 22 in the vehicle front-rear direction, the ridge line 18L has an upper corner portion. 18A is approaching, the height of the inner wall surface 18W is low, and the floor 18D from the lower corner 18B to the flange 18F is greatly inclined. On the other hand, as shown in FIG. 7B, in the region on the rear side of the B pillar 24 of the rocker inner panel 18 that is an example of the rear side portion of the vehicle body 22 in the vehicle front-rear direction, the ridge line 18L has an upper corner. The inner wall surface 18W is spaced apart from the portion 18A, and the inclination of the floor surface 18D from the lower corner portion 18B to the flange 18F is reduced.

  Note that, in the region on the rear side of the B pillar 24, the ridge line 18L does not necessarily have to be inclined if the cross-sectional shape of the rocker inner panel 18 is as shown in FIG. That is, the ridge line 18L may be inclined in a region in front of the B pillar 24 and parallel to the longitudinal direction of the rocker 10 in a region in rear of the B pillar 24.

  On the other hand, the inclined state of the ceiling surface 18S extending from the upper corner portion 18A to the upper flange 18F is constant over the entire length of the rocker inner panel 18, as shown in FIGS. In the region behind the B-pillar 24, it is mainly the lower corner 18B that is subjected to bending compression at the time of the offset frontal collision, so the ridgeline (not shown) of the upper corner 18A is located in the rear of the vehicle. The rocker inner panel 18 may be further reduced in weight by being inclined to descend as it goes.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 8, for example, when the left side of a vehicle with a frame collides with an offset front and a collision load F is input from the front wheel 42 to the A pillar 26 of the vehicle body 22 and the vicinity of the front end of the rocker 10, Similarly, in a vehicle side view, a clockwise bending component M1 is present at the front end of the rocker 10 where the A pillar 26 is located, and a clockwise bending component M3 is present at the rear end of the rocker 10 where the C pillar 48 is located. A counterclockwise bending component M2 acts on the substantially central portion of the rocker 10 where the B pillar 24 is located.

  As schematically shown in FIG. 8, the rocker 10 tends to deform into an approximately S shape by these bending components M1, M2, and M3, and the upper portion of the rocker 10 in front of the B pillar 24 is subjected to bending compression. In the rocker 10 on the rear side of the B pillar 24, the lower side portion is subjected to bending compression.

  On the other hand, when the collision load F is input, as schematically shown in FIG. 9, a clockwise bending component M4 is present at the front end of the rocker 10 and at the rear end of the rocker 10 in plan view of the vehicle body. A counterclockwise bending component M5 acts. Due to the bending components M4 and M5, the inner side in the vehicle width direction of the rocker 10 is subjected to bending compression as a whole.

  In consideration of the bending compression of each part of the rocker 10 as described above, in the vehicle body side structure S2 according to the present embodiment, the ridge line 18L of the lower corner 18B of the rocker inner panel 18 is as shown in FIG. Since the vehicle is inclined so as to descend toward the rear of the vehicle, as shown in FIG. 7A, bending compression in the upper corner 18A in the region on the front side of the B pillar 24 of the rocker inner panel 18 is performed. While maintaining the rigidity of the inner wall surface 18W, the height of the inner wall surface 18W can be lowered to reduce the weight of the rocker inner panel 18. The weight reduction of the vehicle body 22 can be expected to improve fuel consumption.

  More specifically, in the region on the front side of the B pillar 24, the rigidity against bending compression at the upper corner 18A is ensured, and on the rear side from the B pillar 24, the rigidity against bending compression at the lower corner 18B is secured. Therefore, the bending components M1, M2, M3, M4, and M5 that act on the rocker 10 at the time of the offset frontal collision can be rationally handled, whereby the collision load F input to the rocker 10 can be rationalized. Therefore, the deformation of the vehicle body 22 as shown in FIGS. 8 and 9 can be suppressed. When the vehicle body 22 tilts forward at the time of an offset collision, the direction of the inclined ridge line 18L approaches horizontal, so that the collision load F can be efficiently transmitted to the rocker 10.

  In each of the above embodiments, an area on the front side from the B pillar 24 is given as an example of the front side part in the vehicle front-rear direction, and an area on the rear side from the B pillar 24 is given as an example in the rear side part in the vehicle front-rear direction. The boundary is not limited to the B pillar 24, and it is desirable that the boundary is the position where the bending component M2 in FIG. It depends on the setting of the rigidity of each part of the rocker 10. Moreover, although the structure in planar view of the vehicle body 22 was shown in FIG. 5, FIG. 9, the structure of the vehicle body 22 is not restricted to the thing of illustration.

1 to 5 relate to the first embodiment, and FIG. 1 is a partially broken perspective view showing a vehicle body side part structure. FIG. 2 is a view taken along arrow 2-2 in FIG. 1, showing the arrangement of front reinforcement and rear reinforcement provided on the rocker inner panel. FIG. 3 is a cross-sectional view taken along arrow 3-3 in FIG. 1 showing the internal structure of the rocker at the position of the B pillar. It is a side view which shows typically the bending component which acts on this rocker, and the deformation | transformation shape of this rocker when a collision load is input into the front-end part of a rocker. It is a top view which shows typically the bending component which acts on this rocker when a collision load is input into the front-end part of a rocker, and the deformation | transformation shape of this rocker. 6 to 9 relate to the second embodiment, and FIG. 6 is a side view showing the vehicle body side part structure. (A) It is 7A-7A arrow sectional drawing in FIG. 6 which shows the internal structure of a rocker. (B) It is a 7B-7B arrow sectional drawing in FIG. 6 which shows the internal structure of a rocker. It is a side view which shows typically the bending component which acts on this rocker, and the deformation | transformation shape of the rocker by this bending component when a collision load is input into the front-end part of a rocker. It is a top view which shows typically the bending component which acts on this rocker when a collision load is input into the front-end part of a rocker, and the deformation | transformation shape of this rocker.

Explanation of symbols

10 Rocker 14 Front reinforcement (front high rigidity part)
14R Rear end 16 Rear reinforcement (rear high rigidity part)
16F Front end 18A Upper corner 18B Lower corner 22 Car body 30 Cross member 44 Car body frame S1 Car body side structure S2 Car body side part structure

Claims (4)

  A vehicle body side portion on the body frame extends in the vehicle front-rear direction, a front high-rigidity portion is provided in an upper corner portion on the vehicle width direction inner side in the vehicle front-rear direction front portion, and a vehicle width direction inner side in the vehicle front-rear direction rear side portion A vehicle body side structure comprising a rocker provided with a rear high-rigidity portion at a lower corner of the vehicle body. A cross member extends in the vehicle width direction between the left and right rockers at a substantially central portion in the vehicle longitudinal direction.
2. The vehicle body side portion according to claim 1, wherein a rear end portion of the front high-rigidity portion and a front end portion of the rear high-rigidity portion are disposed at positions overlapping the cross member in the vehicle width direction. Construction. The front high-rigidity portion is a reinforcement of the upper corner portion by front reinforcement,
The vehicle body side part structure according to claim 1 or 2, wherein the rear high-rigidity part is obtained by reinforcing the lower corner part by rear reinforcement.   The vehicle body side part structure according to any one of claims 1 to 3, wherein a ridgeline of the lower corner is inclined so as to descend toward the rear of the vehicle.

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