JP5040722B2 - Lower body structure of automobile - Google Patents

Description

  The present invention relates to a lower body structure of an automobile.

  2. Description of the Related Art Generally, an automobile body has a side sill extending in the front-rear direction and a center pillar extending in the up-down direction and having a lower end connected to the side sill as a vehicle body strength member. The side sill is constituted by a side sill inner and a side sill outer so as to have a closed cross-sectional shape, and a reinforcement is also provided therein. In addition, the center pillar is constituted by a center pillar inner and a center pillar outer, and a center pillar reinforcement is disposed therein.

In order to cope with a side collision in the vicinity of the center pillar, Patent Document 1 provides a partition wall member extending in the front-rear direction in the connection portion of the center pillar in the side sill, and between the side sill outer and the partition wall member Providing a first knot member that partitions the first space in the front-rear direction, while providing a second knot member that partitions the second space between the side sill inner and the partition wall member in the front-rear direction is proposed. .
JP 2007-210367 A

  By the way, in recent automobiles, it has been desired to respond more sufficiently to a side collision near the center pillar.

  Therefore, an object of the present invention is to provide a lower body structure of an automobile that can more fully cope with a side collision in the vicinity of a center pillar.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1 in the claims,
A side sill that forms a closed section extending in the front-rear direction with the side sill outer and the side sill inner;
A center pillar composed of a center pillar outer and a center pillar inner, extending in the vertical direction and having a lower end connected to the side sill;
A partition wall member that partitions the inside of the side sill below the center pillar into left and right;
A first node member disposed in a first space between the side sill outer and the partition wall member, and partitioning the first space in the front-rear direction;
A second node member disposed in a second space between the partition wall member and the side sill inner and partitioning the second space in the front-rear direction;
With
A front end portion of the rear side frame is connected to an inner side surface of the side sill in the vehicle width direction, and is disposed so as to overlap with a rear end portion of the partition wall member in a side view.
The first knuckle members are respectively disposed in the vicinity of front and rear ends of the partition wall member;
The second node member is disposed near the front end of the rear side frame;
It is like that. According to the above solution, the load input in the vicinity of the center pillar is also received by the rear side frame via the side sill outer, the first node member, the partition wall member, the second node member, and the side sill inner. It is possible to cope with a side collision more effectively.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
A third node member extending in the vehicle width direction is disposed in the side sill near the front end of the partition wall member (corresponding to claim 2). In this case, a side collision in the vicinity of the center pillar can be dealt with more effectively by using the third node member.

  The length in the front-rear direction of the partition wall member is set to be larger than the length in the front-rear direction at the upper end position of the side sill of the center pillar (corresponding to claim 3). In this case, the load input near the center pillar is preferable for transmitting the side impact load over a wider range in the front-rear direction while suppressing the number of node members.

  A closing member for closing the front end portion of the rear side frame is provided (corresponding to claim 4). In this case, the load bearing performance received by the rear side frame can be improved by the closing member, and the side collision can be more effectively dealt with.

  The closing member is constituted by a kick-up portion of a floor panel (corresponding to claim 5). In this case, the closing member can be configured using an existing kick-up portion.

  The rear side frame is provided with a fourth node member that partitions the interior of the rear side frame in the front-rear direction at substantially the same position as the first node member on the rear side. 6 correspondence). In this case, it is possible to improve the load resistance performance when the rear side frame receives a side collision load transmitted from the first node member on the rear side.

A center tunnel portion that bulges upward is formed at the center of the floor panel in the vehicle width direction,
On the floor panel in front of the center pillar, a cross member is provided that extends in the vehicle width direction and bridges the side sill and the center tunnel portion,
A front end of the partition wall member extends forward to the vicinity of the cross member;
(Corresponding to claim 7). In this case, the load of the side collision is received even by the cross member, which is more preferable in terms of handling the side collision.

  The third node member is positioned at a position overlapping the cross member and the partition wall portion in a side view (corresponding to claim 8). In this case, it is preferable to receive the side collision load more effectively by the cross member.

  The rear end of the partition wall member is connected to the rear wheel house (corresponding to claim 9). In this case, the rigidity of the rear portion of the side sill is improved, and this is more preferable for dealing with a side collision.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle body structure which can respond more fully to the side collision in the center pillar vicinity is provided.

  In FIG. 1, an automobile V to which the present invention is applied is a hatchback type having a pair of left and right side doors 1 and a back door 2 that opens and closes a rear opening. The seat in the passenger compartment has a front seat (driver seat and front passenger seat) and a rear seat. Of course, the side door 1 is used for both getting on and off the front seat occupant and getting on and off the rear seat occupant.

  A rear edge portion of the opening / closing opening 1 a that is opened and closed by the side door 1 is constituted by a center pillar 10. As shown particularly in FIG. 8, the center pillar 10 is formed in a closed cross-sectional shape by an inner panel 11, an outer panel 12, and a reinforcement 13, and has excellent rigidity. In the embodiment, the outer panel 12 is formed integrally with an outer panel such as a rear fender, and the rigidity of the center pillar 10 is mainly secured by the inner panel 11 and the reinforcement 13. A rear pillar 20 is disposed behind the center pillar 10. The rear pillar 20 is also configured in a closed cross section by an inner panel and an outer panel. In the embodiment, the rear pillar 20 constitutes a side edge of the rear opening that is opened and closed by the back door 2.

  A window opening 21 is formed between the upper part of the center pillar 10 and the upper part of the rear pillar 20, and the window opening 21 is closed by a quarter window glass 22. In addition, the quarter window glass 22 may be either a killed or open / close type.

  In particular, as shown in FIG. 2, a rear wheel house 25 is formed on the inner panel from the center pillar 10 to the rear pillar 20 below the window opening 21. The rear wheel house 25 has a front edge located behind the center pillar 10 and a rear edge located near the rear end of the vehicle body.

  The center pillar 10 and the rear pillar 20 are connected by a belt line reinforcement 27 extending in the front-rear direction (see FIGS. 2 and 7). The belt line reinforcement 27 is positioned above and below the rear wheel house 25 at a substantially intermediate position in the vertical direction of the center pillar 10. The beltline reinforcement 27 constitutes the lower edge of the window opening 21 described above. The beltline reinforcement 27 is formed only by the inner panel in the embodiment, but may be formed by a closed cross section by the inner panel and the outer panel.

  The center pillar 10 and the rear wheel house 25 are spaced apart in the front-rear direction. In the inner panel, a side opening 28 is formed between the center pillar 10 and the rear wheel house 25. The side opening 28 has a front edge portion formed by the center pillar 10, an upper edge portion formed by the beltline reinforcement 27, and a rear edge portion inclined obliquely at the front edge portion of the rear wheel house 25. And is formed in a triangular shape as a whole. In the embodiment, the inner panels of the center pillar 10, the rear pillar 20, and the belt line reinforcement 27 are formed of a single common panel material. The side opening 28 is covered from the vehicle interior side by a trim material (not shown) and from the vehicle outer side by a vehicle body outer panel.

  As shown in FIGS. 8 to 10, the side sill 30 as a vehicle body strength member is formed in a closed cross-sectional shape by an inner panel 31 and an outer panel 32. Such a rigid side sill 4 extends long in the longitudinal direction of the vehicle body, and its rear end (the rear end of the inner panel 31) is joined to the front end of the rear wheel house 25 (for example, by welding, The same).

  A floor panel 40 is disposed between the pair of left and right side sills 30 and the rear wheel house 25. The floor panel 40 includes a kick-up portion 41 that extends in the vehicle width direction near the center pillar 10 and connects the pair of left and right side sills 30 to each other. The kick-up portion 41 extends short in the vertical direction, the front seat is attached to the front floor panel 42 in front of the kick-up portion 41, and the rear seat is attached to the rear floor panel 43 behind the kick-up portion 41. . In the embodiment, the kick-up portion 41, the front floor panel 42, and the rear floor panel 43 are integrally formed after being formed separately from each other. Further, in the embodiment, the rear floor panel 43 is formed with an upward bulging portion 43a for storing the fuel tank below at a position immediately after the kick-up portion 41, and a spare tire is provided at the rear end portion. A storage recess 43b for storage is formed.

  The front floor panel 42 has a tunnel portion 44 that bulges upward in an intermediate portion in the vehicle width direction, and the rear end of the tunnel portion 44 is continuous with the kick-up portion 41. A cross member 45 that extends in the vehicle width direction and bridges (connects) the side sill 30 and the tunnel portion 44 is joined to the upper surface of the front floor panel 42.

  The lower end portion of the center pillar 10 is connected to a side sill 30 as a vehicle body strength member extending in the front-rear direction. A partition wall member 50 extending in the front-rear direction is disposed in the side sill 30 in the vicinity of the center pillar 10. In the embodiment, the partition wall member 50 is configured by extending the inner panel 11 of the center pillar 10 downward. That is, the inner panel 11 of the center pillar 10 is joined to the upper and lower joining portions of the inner panel 31 and the outer panel 32 in the side sill 30, and the inside of the side sill 30 is divided in the vehicle width direction (FIG. 8, (See FIG. 9).

  The partition wall member 50 is set so that its longitudinal length is sufficiently larger than the longitudinal length of the center pillar 10 at the upper end position of the side sill 30. More specifically, the rear end portion of the partition wall member 50 is joined to the rear wheel house 25, and the front end of the partition wall member 50 is located near the rear end of the cross member 45 in a side view.

  A rear side frame 60 joined to the lower surface of the rear floor panel 43 is joined to the rear end of the side sill 30 (see FIGS. 3 to 5, 8, and 10). That is, the rear side frame 60 forms a closed cross section in cooperation with the rear floor panel 43, and the vehicle width direction outer side surface thereof is joined to the side sill 30 in the vehicle width direction inner side surface. The front end position of the rear side frame 60 is set so as to extend to a substantially intermediate position in the front-rear direction of the partition wall member 50 in a side view. And the front-end opening part of the rear side frame 60 is obstruct | occluded by the kick-up part 41 mentioned above especially as shown in FIG.

  In the first space K1, which is a space between the partition wall member 50 and the outer panel 32 of the side sill 30, first node members 51 and 52 are disposed (particularly, refer to FIG. 10). Each distribution member 51, 52 is disposed so as to partition the first space K1 in the front-rear direction. The first node members 51 and 52 are arranged with a space therebetween in the front-rear direction, and the first node member 51 on the front side is positioned near the front end portion of the partition wall member 50, while the first member on the rear side. The one node member 52 is positioned near the rear end of the partition wall member 50.

  In the side sill 30, a second node member 53 and a third node member 54 are further disposed. The second node member 53 is disposed so as to partition the second space K2 in the front-rear direction in the second space K2, which is a space between the partition wall member 50 and the inner panel 31 of the side sill 30. The position of the second member 53 in the front-rear direction is set to be a substantially intermediate position between the first node members 51 and 52 in the front-rear direction.

  The third node member 54 is disposed in the side sill 30 at a position slightly ahead of the partition wall member 50. The position of the third node member 54 in the front-rear direction is set to a position overlapping the cross member 45 in a side view. However, although the third node member 54 is connected and joined to the inner panel 31 of the side sill 30, the outer side end position in the vehicle width direction is close to the partition wall member 50, and the outer panel 32 of the side sill 30. It is said that the length is not reached. The length in the vehicle width direction of the third node member 54 may be sufficiently long so as to reach (join) the outer panel 32 so that the inside of the side sill 30 is partitioned in the front-rear direction.

  A fourth node member 61 is disposed on the rear side frame 60. The fourth node member 61 is disposed so as to partition the rear side frame 60 in the front-rear direction, and the position in the front-rear direction is set to be in the vicinity of the first node member 52 on the rear side. .

  In the above configuration, when a side impact load is input near the center pillar 10, the load is applied to the outer panel 32, the first node members 51 and 52, the partition wall member 50, and the second node of the side sill 30. It is transmitted to the rear side frame 60 (fourth node member 61) through the member 53 and the inner panel 31 of the side sill 30. On the other hand, the side impact load is transmitted from the outer panel 32 of the side sill 30 to the cross member 45 through the third node member 54 and the inner panel 31. As described above, the load of the side collision is not only received by the side sill 30 alone but also effectively received by the rear side frame 60 and the cross member 45, and is a very preferable load transmission path for dealing with the side collision. Is formed. In particular, since the first node member 52 on the rear side and the fourth node member 61 of the rear side frame 60 are set so as to overlap each other in a side view, the load of the side collision is applied to the rear side frame 60 (fourth The joint member 61) can be effectively transmitted. Of course, the rear side frame 60 is reinforced not only by the fourth node member 61 but also by the kick-up portion 41.

  Since the side sill 30 itself is also reinforced by the partition wall member 50 and each node member 51, 52, 53, 54, and the rear end portion of the partition wall member 50 is connected to the rear wheel house 25, This is also preferable for improving the rigidity of the side sill 30 itself. Further, by extending the inner panel 11 of the center pillar 10 downward and forming the partition wall member 50, the coupling strength between the center pillar 10 and the side sill 30 is also improved.

  FIG. 11 shows a second embodiment of the present invention. The same components as those of the above-mentioned embodiment are denoted by the same reference numerals, and redundant description thereof is omitted. In the present embodiment, the partition wall member 50 is further extended forward as compared with the above-described embodiment so that the cross member 45 and the front end portion of the partition wall member 50 overlap in a side view. In this overlapping portion, the third node member 54 is positioned (the second space K2 is extended forward, and the third node member 54 is the second space K2 in the same manner as the second node member 53). Is divided in the front-rear direction). In the present embodiment, the side impact load can be more effectively transmitted to the cross member 45.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. For example, the partition wall member 50 may be a separate dedicated member, or may be constituted by a reinforcement of the side sill 30. The side opening 28 may not be provided. The outer panel 12 of the center pillar 10 may be formed as a separate body without being integrally formed with a vehicle body outer panel such as a rear fender (an outer panel dedicated to the center pillar 10). In this case, in particular, the outer panel The improvement of the rigidity of the center pillar 10 can be expected. The present invention can be similarly applied to a four-door type vehicle as well as a two-door vehicle. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

The simplified side view which shows an example of the motor vehicle to which this invention was applied. The perspective view which looked at the center pillar vicinity from the vehicle interior side. The expansion perspective view which shows the state which removed the rear floor panel from the state of FIG. The expansion perspective view which shows the state which removed the kick-up part and the front floor panel from the state of FIG. The expansion perspective view which shows the state which removed the inner panel of the side sill from the state of FIG. The expansion perspective view which shows the state which removed the rear side frame from the state of FIG. The perspective view which looked at the center pillar part from the vehicle outer side in the state which removed the outer panel. FIG. 11 is a cross-sectional view corresponding to line X8-X8 in FIG. FIG. 11 is a cross-sectional view corresponding to line X9-X9 in FIG. 10. FIG. 10 is a cross-sectional view corresponding to line X10-X10 in FIG. 9; Sectional drawing which shows the 2nd Embodiment of this invention and respond | corresponds to FIG.

Explanation of symbols

V: Automobile 10: Center pillar 11: Inner panel 12: Outer panel 13: Reinforcement 20: Rear pillar 25: Rear wheel house 30: Side sill 31: Inner panel (side sill inner)
32: Outer panel (side sill outer)
40: Floor panel 41: Kick-up part 44: Tunnel part 45: Cross member 50: Partition wall member 51: First node member (front side)
52: First node member (rear side)
53: Second node member 54: Third node member 60: Rear side frame 61: Fourth node member

Claims (9)

A side sill that forms a closed section extending in the front-rear direction with the side sill outer and the side sill inner;
A center pillar composed of a center pillar outer and a center pillar inner, extending in the vertical direction and having a lower end connected to the side sill;
A partition wall member that partitions the inside of the side sill below the center pillar into left and right;
A first node member disposed in a first space between the side sill outer and the partition wall member, and partitioning the first space in the front-rear direction;
A second node member disposed in a second space between the partition wall member and the side sill inner and partitioning the second space in the front-rear direction;
With
A front end portion of the rear side frame is connected to an inner side surface of the side sill in the vehicle width direction, and is disposed so as to overlap with a rear end portion of the partition wall member in a side view.
The first knuckle members are respectively disposed in the vicinity of front and rear ends of the partition wall member;
The second node member is disposed near the front end of the rear side frame;
A lower body structure of an automobile characterized by that. In claim 1,
A lower body structure for an automobile, wherein a third node member extending in the vehicle width direction is disposed in the side sill in the vicinity of the front end portion of the partition wall member. In claim 1 or claim 2,
A lower body structure of an automobile, wherein a length of the partition wall member in the front-rear direction is set to be larger than a length in the front-rear direction at the upper end position of the side sill of the center pillar. In any one of Claims 1 thru | or 3,
A lower body structure of an automobile, wherein a closing member for closing a front end portion of the rear side frame is provided. In claim 4,
A lower body structure of an automobile, wherein the closing member is constituted by a kick-up portion of a floor panel. In any one of Claims 1 thru | or 5,
The rear side frame is provided with a fourth node member for partitioning the rear side frame forward and backward at substantially the same position as the first node member on the rear side in the front-rear direction. Lower body structure. In claim 3,
A center tunnel portion that bulges upward is formed at the center of the floor panel in the vehicle width direction,
On the floor panel in front of the center pillar, a cross member is provided that extends in the vehicle width direction and bridges the side sill and the center tunnel portion,
A front end of the partition wall member extends forward to the vicinity of the cross member;
A lower body structure of an automobile characterized by that. In claim 7,
The lower body structure of an automobile, wherein the third node member is located at a position overlapping the cross member and the partition wall portion in a side view. In any one of Claims 1 thru | or 8,
A lower body structure of an automobile, wherein a rear end portion of the partition wall member is connected to a rear wheel house.

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