JP5906920B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure.

  Conventionally, in order to increase the rigidity of the jack-up part under the side sill, a bracket is interposed between the side sill and the side member, and the lower surface of the bracket and the lower flange of the side sill inner are connected by a jack reinforcement. The structure is known (for example, refer to Patent Document 1 below).

Japanese Utility Model Publication No. 1-161991

  By the way, when the vehicle collides frontward, particularly in the case of a small lap collision in which one side in the vehicle width direction receives a collision load from the front, the front part of the side sill is inclined forward from the outside in the vehicle width direction to the inside by the front wheel located in front of it. Receive a large load from For this reason, there exists a possibility that the front part of a side sill may deform | transform large toward a vehicle width direction inner side, and it is necessary to raise the rigidity of the front part periphery of a side sill more.

  Therefore, an object of the present invention is to further increase the rigidity around the front portion of the side sill.

The present invention connects the front part of the side sill and the side member located on the inner side in the vehicle width direction of the side sill via the outrigger, the connecting portion of the outrigger to the side sill, the jack reinforcement provided on the side sill, the side member, The reinforcing member is connected to the side sill, and one end of the reinforcing member is overlaid on the outrigger, and the jack reinforcement is overlaid on the one end of the reinforcing member. And

  According to the present invention, the rigidity around the front portion of the side sill is obtained by connecting the high-rigidity outrigger and jack reinforcement connected to the side sill and the side member located inside the side sill in the vehicle width direction by the reinforcing member. Can be further increased, and deformation of the front portion of the side sill at the time of a frontal collision can be suppressed.

It is a bottom view of the front part of a car showing the body structure concerning one embodiment of the present invention. It is AA sectional drawing of FIG. It is the perspective view seen from the vehicle width direction outer side which shows the front wheel periphery of the right side of FIG. FIG. 4 is a perspective view showing a main part in a state where the wheel and the suspension member of FIG. 3 are omitted, as viewed from the inner side in the vehicle width direction. It is BB sectional drawing of FIG.

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

  A vehicle body 1 shown in FIG. 1 is located on both sides in the vehicle width direction (left-right direction in FIG. 1) and extends in the vehicle front-rear direction (vertical direction in FIG. And a side member 5 that is located on the inner side in the vehicle width direction of the side sill 3 and extends in the vehicle longitudinal direction. The pair of left and right side sills 3 and the pair of left and right side members 5 are arranged in a lower part of the vehicle body 1 in a state of being substantially parallel to each other, and are connected to the floor panel 7.

  As shown in FIG. 2, the side sill 3 includes a sill outer 9 and a sill inner 11 each having a substantially U-shaped cross section, an upper flange 9 a and a lower flange 9 b of the sill outer 9, and an upper flange 11 a and a lower portion of the sill nah 11. A closed cross section is formed by joining the flange 11b.

  A lower end portion of a front pillar lower 15 which is a lower portion of the front pillar 13 shown in FIG. 3 is connected to the upper portion of the side sill 3. The front pillar lower 15 includes a pillar outer 17, a pillar inner 19, and a pillar reinforcement 21 located inside the pillar outer 17.

  Then, the lower flanges 17a and 21a of the pillar outer 17 and the pillar reinforcement 21 are joined and connected to the outer surface of the sill outer 9 in a state where they are overlapped with each other. The lower flange 19a of the pillar inner 19 is joined to the upper flange 11a so as to sandwich the upper flange 11a of the silunner 11 with the upper flange 9a of the sill outer 9.

  On the other hand, the side member 5 includes an outer panel 23 positioned at the lower part of the floor panel 7 and an inner panel 25 positioned at the upper part of the floor panel 7. With the left and right flanges 23a and 23b of the outer panel 23 and the left and right flanges 25a and 25b of the inner panel 25 facing each other, the floor panel 7 is sandwiched between them, and closed cross sections are formed on both upper and lower sides of the floor panel 7. Form.

  The floor panel 7 is formed by connecting a flange 7a formed by bending the outer end in the vehicle width direction upward to the lower inner surface of the sill inner 11 so as to project the center in the vehicle width direction toward the vehicle compartment 27 side. A center tunnel portion 7b is formed.

  In the present embodiment, as shown in FIGS. 1 and 3, the end portion 3 a on the vehicle body front side, which is the front portion in the vehicle longitudinal direction of the side sill 3, and the side member 5 are connected by the outrigger 29. The side sill 3 and the side member 5 are connected to each other by the reinforcing member 31 at the vehicle body rear position.

  As shown in FIG. 4, the outrigger 29 includes a lower surface portion 29 a facing the floor panel 7, and a front surface portion 29 b facing the vehicle body front-rear direction by bending the vehicle body front side of the lower surface portion 29 a upward. I have. An attachment flange 29c on the outer side in the vehicle width direction of the front surface portion 29b is joined to the front end surface 11c of the sill inner 11, and an attachment flange 29d on the outer side in the vehicle width direction of the lower surface portion 29a is joined to the lower surface of the sill inner 11 in the vicinity of the front end surface 11c.

  The front portion 29b of the outrigger 29 is formed so that the inner side in the vehicle width direction gradually increases with respect to the outer side in the vehicle width direction, and the mounting flange 29e (see FIG. 3) on the inner side in the vehicle width direction becomes wider. The side member 5 is joined to the outer side surface in the vehicle width direction. The lower surface portion 29a of the outrigger 29 is also formed so that the inner side in the vehicle width direction gradually becomes wider with respect to the outer side in the vehicle width direction, and the mounting flange 29f on the inner side in the vehicle width direction is connected to the side member 5 (outer panel 23). ).

  On the other hand, the reinforcing member 31 joins the mounting flange 31 a on the outer side in the vehicle width direction to the lower surface of the sill inner 11. At that time, a part of the mounting flange 31a on the front side of the vehicle body is overlapped and fixed from below a part of the mounting flange 29d of the outrigger 29 on the rear side of the vehicle body. The inner side in the vehicle width direction of the reinforcing member 31 is in a state in which end surfaces 31b (see FIG. 3) bent at both sides in the longitudinal direction of the vehicle body are in contact with the outer surface in the vehicle width direction of the side member 5 with respect to the end surface 31b. The bent mounting flange 31c is joined to the lower surface of the side member 5 (outer panel 23).

  The above-described reinforcing member 31 is arranged in the vehicle width direction (the left and right sides of the vehicle body 1 in FIG. 1) so that the vehicle width direction inner side provided with the mounting flange 31c is located on the vehicle body rear side with respect to the vehicle width direction outer side provided with the mounting flange 31a. Direction).

  The reinforcing member 31 includes a convex portion 31d that protrudes downward between the mounting flanges 31a and 31c. The convex portion 31d has a lower surface portion 31d1, a front surface portion 31d2, and a rear surface portion 31d3 that form substantially the same surface as the mounting flange 31c, and has a substantially U-shaped cross section. The upper ends of the front surface portion 31d2 and the rear surface portion 31d3 A joining flange 31e and a joining flange 31f projecting from the edge to the front and rear of the vehicle body are provided. These joining flanges 31e and 31f are joined and fixed to the lower surface of the floor panel 7 to form a closed cross section with the floor panel 7 as shown in FIG.

  The above-described lower surface portion 31d1 of the convex portion 31d is provided with an inclined portion 31d4 which is located at an upper position on the outer side in the vehicle width direction on the outer side in the vehicle width direction, and is continuous with the mounting flange 31a.

  As shown in FIG. 4, the sill lower flange 33 formed by joining the lower flanges 9b and 11b of the side sill 3 shown in FIG. A jack-up portion 35 is provided at the rear position of the vehicle body. The jack-up portion 35 is a portion for fitting a claw portion of a jack (not shown) to jack up the vehicle body 1 when the front wheel 37 located in front of the jack-up portion 35 is replaced or repaired.

  A jack reinforcement 39 is joined and fixed to the jack-up portion 35 for reinforcement. The jack reinforcement 39 includes a main portion 39a corresponding to the lower surface of the sill inner 11, and an inner surface of the sill lower flange 33 which is bent downward from the vehicle width direction outer side of the main portion 39a, that is, the lower flange 11b of the sill inner 11. And a bent portion 39b to be joined. The main body portion 39a forms a bulging portion 39a1 that bulges downward to increase the rigidity.

  Then, the three mounting flange portions 39a2 around the bulging portion 39a1 are overlapped and fixed to the mounting flange 31a of the reinforcing member 31 from below. Here, the attachment flange 31a of the reinforcing member 31 is joined to a region of about half of the lower surface of the sill inner 11 in the vehicle width direction, and therefore is located on both sides in the vehicle longitudinal direction and extends in the vehicle width direction. The two mounting flange portions 39 a 2 are joined between the mounting flange 31 a of the reinforcing member 31 and the lower surface of the sill inner 11.

  In this way, the reinforcing member 31 has one end corresponding to the outer side in the vehicle width direction connected to the connecting portion of the outrigger 29 to the side sill 3 and the jack reinforcement 39, and the other end corresponding to the inner side in the vehicle width direction. It is connected to the side member 5.

  Reference numeral 41 in FIG. 1 is a suspension member, and the suspension member 41 and the front wheel 37 are omitted in FIG.

  Next, a description will be given of a deformation mode of the vehicle body at the time of a small lap collision that receives a collision load from the front of the front wheel 37 on one side in the vehicle width direction when a vehicle having the above-described vehicle body structure collides with the front. At this time, the impact load input to the front bumper at the front of the vehicle body is transmitted to the front wheel 37 by deformation caused by the movement of the front bumper to the rear of the vehicle body.

  The front wheel 37 that has received the impact load moves rearward as indicated by an arrow D in FIG. 1 and rotates around a suspension device positioned inward in the vehicle width direction as indicated by an arrow E. It moves from the front outer side toward the vehicle body rear inner side. By such movement of the front wheel 37 from the front outer side of the vehicle body toward the rear inner side of the vehicle body, the end portion 3a of the side sill 3 on the front side of the vehicle body receives a load F directed from the front outer side of the vehicle body toward the rear inner side of the vehicle body.

  Here, in the vehicle body structure of the present embodiment, the rigid outrigger 29 and the jack reinforcement 39, and the side member 5 are connected by the reinforcing member 31, and the side sill 3 near the front end 3a of the vehicle body Increased rigidity. For this reason, the vicinity of the end 3a of the side sill 3 on the vehicle body front side can sufficiently resist the load F and suppress deformation.

  At this time, in this embodiment, the reinforcing member 31 is connected to the outrigger 29 and the jack reinforcement 39, while the other end connected to the side member 5 is located on the rear side of the vehicle body. ing. That is, the extending direction connecting the connecting portions at both ends of the reinforcing member 31 in the vehicle width direction substantially coincides with the input direction of the load F. For this reason, the input of the load F can be efficiently canceled by the reinforcing member 31, and the deformation of the side sill 3 in the vicinity of the end portion 3a on the vehicle body front side can be more effectively suppressed.

  In the present embodiment, the reinforcing member 31 forms a closed cross section with the floor panel 7 to which the side sill 3 and the side member 5 are connected. Therefore, the rigidity of the vicinity of the end 3a of the side sill 3 on the vehicle body front side is further improved, and deformation can be more effectively suppressed.

  As described above, according to the vehicle body structure of the present embodiment, even when the front end portion 3a on the front side of the vehicle body of the side sill 3 receives a large load F through the front wheel 37 in front of the front sill 3, the reinforcing member 31 Deformation of the side sill 3 toward the inside of the vehicle body can be suppressed.

  In the above-described embodiment, the deformation of the side sill 3 that receives a collision load from the right front part of the vehicle body in FIG. 1 has been described. However, in FIG. The deformation can be similarly suppressed.

  In the present embodiment, the reinforcing member 31 is arranged on the lower surface of the floor panel 7, that is, outside the vehicle body as shown in FIG. Similar effects can be obtained.

3 Side sill 5 Side member 7 Floor panel 29 Outrigger 31 Reinforcement member 35 Jack up part 39 Jack reinforcement

Claims (3)

A side sill positioned on both sides in the vehicle width direction and extending in the longitudinal direction of the vehicle body, a side member positioned on the inner side of the side sill in the vehicle width direction and extending in the vehicle longitudinal direction, and a front portion of the side sill in the vehicle longitudinal direction And an outrigger that connects the side member, a jack reinforcement that is provided at a jack-up portion at a lower portion of the side sill and that is positioned at the rear of the outrigger in the vehicle body front-rear direction, and one end of the outrigger to the side sill of the outrigger A vehicle body structure having a connection portion and a reinforcement member connected to the jack reinforcement and having the other end connected to the side member ;
The vehicle body structure according to claim 1 , wherein the one end of the reinforcing member is overlaid on the outrigger connected to the side sill, and the jack reinforcement is overlaid on the one end of the reinforcing member .   2. The vehicle body structure according to claim 1, wherein the reinforcing member has the other end portion located rearward in the vehicle longitudinal direction with respect to the one end portion.   The vehicle body structure according to claim 1, wherein the reinforcing member forms a closed cross section between the side sill and a floor panel to which the side member is connected.

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