JP2007331582A - Vehicle body rear part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the deformation of a vehicle body by efficiently transmitting a lateral collision load in the car width direction in the lateral collision to the vehicle body rear part. <P>SOLUTION: The cabin inside of a rear wheel house 24 is reinforced by a first reinforcing member 11 and a second load transmission member 22 and a rear seat hinge 14 is rotationally supported to the first reinforcing member 11. The rear seat hinge 14 is fixed to a seat back 30 in a position offset to a vehicle rearward side and the cabin inside from a fulcrum 34, and the seat back 30, in its inside, is provided with the rear seat hinge 14 and a load transmission member 21 facing the car width direction. Even if an input position of the lateral collision load in the lateral collision to the vehicle body rear part is offset to the vehicle frontward and vehicle vertical directions of the load transmission member 21 in the seat back 30, this constitution can efficiently transmit the lateral load in the car width direction through the rear seat hinge 14 and the load transmission member 21 so as to suppress the deformation of the vehicle body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rear structure of a vehicle body in consideration of a side collision.

As a conventional vehicle body rear structure, a load transmission member in the vehicle width direction is disposed in a seat back of a vehicle seat, and the rotation center of the seat back is provided at the position of the load transmission member in the vehicle front-rear direction. The structure is disclosed (see Patent Document 1).
JP 2003-118457 A

  However, in the above-described conventional example, when the center of rotation of the seat back is offset forward from the position of the load transmission member, it is difficult to efficiently transmit the side impact load to the load transmission member. .

  In consideration of the above facts, an object of the present invention is to efficiently transmit a side impact load in the vehicle width direction at the time of a side collision to the rear portion of the vehicle body, thereby suppressing vehicle body deformation.

  The first aspect of the present invention includes a first reinforcing member that extends in the vehicle longitudinal direction on the vehicle interior side of the rear wheel house, reinforces the rear wheel house, and extends in the vehicle vertical direction on the vehicle interior side of the rear wheel house. And is disposed between the second reinforcing member which is adjacent to or coupled to the rear portion of the first reinforcing member and reinforces the rear wheel house and the left and right rear wheel houses, and is capable of transmitting a load in the vehicle width direction. A vehicle rear seat having a flexible seat back, and a rear seat hinge that is rotatably supported with respect to the first reinforcing member and is fixed to the seat back at a position offset from the fulcrum to the vehicle rear side and the vehicle interior side It is characterized by that.

  In the vehicle body rear structure according to claim 1, the rear seat hinge is rotatably supported by the first reinforcing member, and is fixed to the seat back at a position offset from the fulcrum to the vehicle rear side and the vehicle interior side. Therefore, the degree of freedom of the locus of the rear seat hinge when the seat back is folded is high.

  On the other hand, the rear wheel house is reinforced in the vehicle longitudinal direction by the first reinforcing member, and is also reinforced in the vehicle vertical direction by the second reinforcing member adjacent to or coupled to the rear portion of the first reinforcing member. Since the rear seat hinge is supported by the member, the support rigidity of the rear seat hinge during normal use is high. This also allows the side impact load input position in the case of a side collision to the rear of the vehicle body to be offset through the rear seat hinge and the seat back even if the load transmission member in the seat back is offset in front of the vehicle or in the vertical direction of the vehicle. It is possible to efficiently transmit the side impact load in the vehicle width direction and suppress vehicle body deformation.

  According to a second aspect of the present invention, in the rear structure of the vehicle body according to the first aspect, a gap is provided between the first reinforcing member and the rear seat hinge outside the seat back in the vehicle width direction. Further, a load transmission means capable of transmitting a load in the vehicle width direction is provided.

  In the rear structure of the vehicle body according to claim 2, a gap is provided between the first reinforcing member and the rear seat hinge on the outer side in the vehicle width direction in the seat back, and a load can be transmitted to the gap in the vehicle width direction. Since the load transmitting means is provided, the side collision load input to the rear wheel house at the time of a side collision is caused to pass through the two load transmission paths of the path from the rear seat hinge and the path from the load transmitting means. It is transmitted to the load transmitting member in the bag. For this reason, the load transmission to the load transmission member becomes more reliable, and the load applied to each load transmission path is dispersed, which is more advantageous in terms of strength. Furthermore, it is possible to adjust the load transmission timing and the distribution ratio of the load transmission amount to each load transmission path by setting the load transmission means, the rigidity, and the dimension of the gap.

  According to a third aspect of the present invention, in the rear structure of the vehicle body according to the first or second aspect, the seat back is configured to be foldable, and a hinge on the center side of the passenger compartment is connected to the vehicle body. It is characterized by having.

  In the vehicle body rear structure according to claim 3, since the hinge on the vehicle center side of the seat back is connected to the vehicle body, the side impact load input to the load transmitting member in the seat back is detected on the vehicle center side. It is possible to disperse the load to the vehicle body via the hinges, and to adjust the load transmission amount to the rear wheel house side on the anti-collision side.

  As described above, according to the vehicle body rear portion structure according to claim 1 of the present invention, at the time of a side collision to the vehicle body rear portion, a side collision load is efficiently transmitted in the vehicle width direction, thereby suppressing vehicle body deformation. The excellent effect of being able to be obtained is obtained.

  According to the vehicle body rear structure according to claim 2, by transmitting the side impact load to the load transmission member via the two load transmission paths, the load transmission in the vehicle width direction can be made more reliable. An excellent effect is obtained.

  According to the vehicle body rear structure according to the third aspect, the side impact load can be distributed to the vehicle body via the hinge on the center side of the passenger compartment, and the load transmission amount to the rear wheel house side on the anti-collision side is adjusted. The excellent effect of being able to be obtained is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the vehicle body rear structure S according to the present embodiment is a structure that considers a side collision with the rear part of the vehicle body 10, and includes a first reinforcing member 11, a second reinforcing member 12, a rear seat hinge 14, a load It has the transmission member 21 and the 2nd load transmission member 22 which is an example of a load transmission means.

  In FIG. 1 to FIG. 3, the first reinforcing member 11 extends in the vehicle front-rear direction of the rear wheel house 24, that is, the rear wheel house inner 26 and reinforces the rear wheel house 24. This rigid member is fixed to a height position corresponding to the lower portion of the seat back 30 in the vehicle rear seat 28. The first reinforcing member 11 is provided, for example, mainly at the front portion of the rear wheel house inner 26 along the outer shape of the rear wheel house inner 26, and forms a closed cross section with the rear wheel house inner 26. Yes. As shown in FIG. 3, the flange portion 11 </ b> F at the front end of the first reinforcing member 11 is joined together with the flange portion 26 </ b> F of the rear wheel house inner 26 and the flange portion 32 </ b> F of the rear wheel house outer 32. In order to cope with a side collision in a wider range, it is desirable that the front end of the first reinforcing member 11 is further extended to the front of the vehicle.

  2 and 3, the second reinforcing member 12 extends in the vehicle vertical direction on the vehicle interior side of the rear wheel house 24, that is, the rear wheel house inner 26, and is adjacent to the rear portion of the first reinforcing member 11. For example, a rigid member having a hat-shaped cross section is connected to reinforce the rear wheel house 24. The second reinforcing member 12 is fixed to the inner surface of the rear wheel house inner 26 in the vehicle width direction, for example, at the center in the vehicle front-rear direction, and when the side impact load F (FIG. 4) is input near the rear wheel house 24, The fall of the rear wheel house 24 is suppressed.

  The rear seat hinge 14 is rotatably supported with respect to the first reinforcing member 11 using, for example, bolts and nuts, and is offset from the fulcrum 34 made of the bolts and nuts to the vehicle rear side and the vehicle interior side. The seat back 30 is fixed, and the seat back 30 can be folded, for example, forward of the vehicle.

  Specifically, the rear seat hinge 14 is pivotally supported by a fulcrum 34 at a flange portion 14F that is located on the outermost side in the vehicle width direction and extends in the vehicle front-rear direction, and protrudes inward in the vehicle width direction from the rear end of the flange portion 14F. 14A, and a fixing portion 14B extending inward in the vehicle width direction along the back surface of the seat back panel 36 from the rear end of the bending portion 14A. In the fixing portion 14B, a bolt 38 and a nut 40 is fixed to the seat back panel 36. Since the bent portion 14A of the rear seat hinge 14 protrudes inward in the vehicle width direction, a gap D is formed between the bent portion 14A and the first reinforcing member 11 as shown in FIG. Although formed, the second load transmission member 22 is disposed so as to fill the gap D.

  In FIG. 1, the seat back 30 of the vehicle rear seat 28 is configured to be, for example, a foldable type, and the hinge 42 on the vehicle compartment center side of the seat back 30 is, for example, a floor panel (not shown) of the vehicle body 10. The hinge bracket 44 is fixed to the hinge bracket 44. A fulcrum 46 that supports the hinge 42 in the hinge bracket 44 coincides with the fulcrum 34 in the vehicle width direction, and the seat back 30 is configured to be rotatable about an axis C (FIG. 4) connecting the fulcrums 34 and 46. Has been. The seat back 30 is not limited to a split-foldable type, and may be configured to be integrated. In that case, since the hinge 42 and the hinge bracket 44 are not used, the load transmitting member 21 is disposed between the left and right rear seat hinges 14.

  In FIG. 1 to FIG. 3, the load transmission member 21 is provided, for example, on the front side of the seat back panel 36 in the seat back 30 so as to face the rear seat hinge 14 in the vehicle width direction, and the load from the rear seat hinge 14 is transmitted. For example, a rigid member having a hat-shaped cross section that can be transmitted in the vehicle width direction. The load transmitting member 21 extends to the vicinity of the end of the seat back 30 in the vehicle width direction, and is close to the bent portion 14A of the rear seat hinge 14 in the vehicle width direction. The load transmission member 21 is not limited to a hat-shaped member, and may be a pipe-shaped member, for example. Further, it is not always necessary to provide the load transmission member 21 as a separate component with respect to the seat back panel 36, and any configuration that can transmit the load in the vehicle width direction via the seat back 30 may be used.

  For example, the configuration shown in FIG. 9 can be used. In the vehicle body rear structure S shown in FIG. 9, the rear end portion 11R of the first reinforcing member 11 is fixed to the rear wheel house inner 26, and the rear seat hinge 54 is formed in an L shape. The vehicle front-rear direction portion 54A of the rear seat hinge 54 extends close to or abuts the first reinforcing member 11 over the entire length thereof and extends rearward to a position overlapping the seat back panel 36 in the vehicle front-rear direction. A vehicle width direction portion 54B extending inward in the vehicle width direction from the rear end of the front / rear direction portion 54A is fixed to the back surface of the seat back panel 36. Therefore, the load from the first reinforcing member 11 can be directly transmitted to the seat back panel 36 via the vehicle width direction portion 54 </ b> B of the rear seat hinge 54. The seat back panel 36 is bent at the vehicle width direction end, for example, forward of the vehicle as shown in the figure to increase the rigidity in the vehicle width direction, and the seat back panel 36 itself can transmit the load. Even if the gap D is provided between the first reinforcing member 11 and the first reinforcing member 11, it is possible to transmit a load from the first reinforcing member 11 to the seat back panel 36 in the vehicle width direction.

  Also, the configuration shown in FIG. 10 may be adopted. In the vehicle body rear structure S shown in FIG. 10, the seat back panel 36 is extended outward in the vehicle width direction until it approaches or comes into contact with the first reinforcing member 11, and is bent into an L shape from the vehicle width direction outer end portion. And pivotally supported by the first reinforcing member 11 at a fulcrum 34. Since the seat back panel 36 is directly coupled to the first reinforcing member 11, the load from the first reinforcing member 11 is provided even if the gap D is provided between the seat back 30 and the first reinforcing member 11. Can be transmitted directly to the seat back panel 36.

  In FIG. 1 to FIG. 3, the second load transmission member 22 is formed in a gap D between the first reinforcing member 11 and the rear seat hinge 14 on the outside of the seat back 30 in the vehicle width direction, for example, on the extension of the load transmission member 21. A rigid member having a hat-shaped cross section, for example, that can transmit a load in the vehicle width direction. Specifically, the second load transmission member 22 extends, for example, in the vertical direction of the vehicle, is fixed to the vehicle interior side surface of the first reinforcing member 11, and forms a closed cross section with the first reinforcing member 11. Yes. Further, the second load transmission member 22 overlaps the load transmission member 21 in the vehicle longitudinal direction and the vehicle vertical direction, respectively, so that the side collision load F (FIG. 4) at the time of a side collision is more reliably loaded. Transmission to the transmission member 21 is possible. The material of the second load transmission member 22 is not limited to metal, and may be, for example, synthetic resin as long as necessary rigidity is ensured. If the load D can be efficiently transmitted from the rear seat hinge 14 to the load transmitting member 21 even if the gap D exists between the first reinforcing member 11 and the rear seat hinge 14, the second load transmitting member 22 may not be provided.

  As shown in FIGS. 1 and 3, a side seat 48 is fixed to the vehicle interior side of the rear wheel house inner 26, the first reinforcing member 11, the rear seat hinge 14 and the second load transmission member 22, for example. A seat cushion 50 is provided below the side seat 48 and the seat back 30 so that the seat back 30 can be folded down on the seat cushion 50 by being tilted forward of the vehicle. The portion of the side seat 48 may be integrated with the seat back 30, and in that case, the side seat 48 can be folded together with the seat back 30 to the seat cushion 50.

  In the vehicle body rear structure S, as shown in FIG. 7, the first reinforcing member 11 may be divided in the vehicle front-rear direction. When the rear end portion 11R of the first reinforcing member 11 is coupled to the second reinforcing member 12, the rigidity can be further increased. In the vehicle body rear structure S, as shown in FIG. 8, the second load transmitting member 22 may be provided integrally with the first reinforcing member 11. In this case, the number of parts can be reduced to reduce the manufacturing cost. Is possible.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the vehicle body rear structure S, the rear wheel house 24 is reinforced in the vehicle front-rear direction by the first reinforcing member 11, and in the vehicle vertical direction by the second reinforcing member 12 adjacent to or coupled to the rear portion of the first reinforcing member 11. Since the rear seat hinge 14 is supported by the first reinforcing member 11, the support rigidity of the rear seat hinge 14 during normal use is high. Therefore, in FIG. 4, even if the input position of the side collision load F at the time of a side collision to the rear part of the vehicle body is offset in the vehicle front direction or the vehicle vertical direction with respect to the load transmission member 21 in the seat back 30, It is possible to efficiently transmit the side impact load F in the vehicle width direction through the rear seat hinge 14 and the load transmission member 21 to suppress deformation of the vehicle body.

  Specifically, in FIG. 4, when a side collision load F is input at a position offset by a distance OF ahead of the position of the load transmission member 21 due to a side collision, a part of the load f is applied to the rear wheel. It is transmitted from the house 24 to the first reinforcing member 11. When the rear wheel house 24 is deformed inward in the vehicle width direction due to a side collision, the second load transmission member 22 comes into contact with the rear seat hinge 14, so that the load component f 1 of the load f is a load via the path from the rear seat hinge 14. The load component f <b> 2 is transmitted to the transmission member 21, and is transmitted to the load transmission member 21 through the path from the second load transmission member 22. Even if the gap D is provided between the first reinforcing member 11 and the rear seat hinge 14, the second load transmission member 22 is provided so as to fill the gap D. Load can be transmitted.

  In this way, by transmitting the load via the two load transmission paths, the load transmission to the load transmission member 21 becomes more reliable, and the load components f1 and f2 applied to the load transmission paths are reduced. Since it is dispersed, it is more advantageous in terms of strength. Furthermore, the load transmission timing and the distribution ratio of the load transmission amount to each load transmission path can be adjusted by setting the rigidity of the second load transmission member 22 and the size of the gap D (FIG. 3).

  The load f3 transmitted to the load transmission member 21 through the two load transmission paths is transmitted as the load f4 to the load transmission member 21 on the anti-collision side via the hinge 42 and the hinge bracket 44 on the center side of the passenger compartment. Further, the load components f5 and f6 are transmitted to the first reinforcing member 11 through the two load transmission paths of the rear seat hinge 14 and the second load transmission member 22.

  Since the hinge bracket 44 that supports the hinge 42 on the center side of the passenger compartment is fixed to the vehicle body, a part of the side impact load f3 is also distributed to the vehicle body such as a floor panel via the hinge 42 and the hinge bracket 44. Is done. By distributing a part of the load f3 to the vehicle body, it is possible to adjust the load transmission amount to the rear wheel house 24 side on the anti-collision side.

  Next, an operation when the seat back 30 is folded in the vehicle body rear structure S will be described. As shown in FIG. 3, in the vehicle body rear structure S, the rear seat hinge 14 is rotatably supported by the first reinforcing member 11 and at a position offset from the fulcrum 34 to the vehicle rear side and the vehicle interior side. Since the seat back 30 is fixed, the degree of freedom of the locus of the rear seat hinge 14 when the seat back 30 is folded is high.

  Specifically, as shown in FIG. 5, the side seat 48 is formed with a notch 48 </ b> A corresponding to the locus of the rear seat hinge 14 in consideration of folding of the seat back 30. If the rear seat hinge 14 is an L-shaped hinge 54, the locus of the hinge 54 about the axis C becomes larger, so that a larger notch 48B needs to be provided. When the notch 48B is large, the notch 48B is easily exposed when the seat back 30 is folded. However, by providing the rear seat hinge 14 with the bent portion 14A, the locus can be reduced and the cutout portion 48A can be reduced, thereby exposing the cutout portion 48A when the seat back 30 is folded. It is possible to suppress and improve the appearance.

It is a perspective view which shows a vehicle body rear part structure. It is sectional drawing which shows a vehicle body rear part structure. FIG. 3 is a cross-sectional view taken along arrow 3-3 in FIG. 2 showing a vehicle body rear structure. FIG. 6 is a cross-sectional view showing a state in which a side collision load is transmitted in the vehicle width direction when a side collision load is input to the rear part of the vehicle body. It is a perspective view which shows the rear seat hinge and the notch part of a side seat in the state in which the seat back is standing. It is a perspective view which shows the notch part of the rear seat hinge and side seat in the state by which the seat back is folded. It is sectional drawing which shows the vehicle body rear part structure where the 1st reinforcement member is divided | segmented into the front and back. It is sectional drawing which shows the vehicle body rear part structure which provided the 2nd reinforcement member integrally in the 1st reinforcement member. It is sectional drawing of the vehicle body rear part structure using an L-shaped rear seat hinge. It is sectional drawing of the vehicle body rear part structure which extended the seat back panel to the 1st reinforcement member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Car body 11 1st reinforcement member 12 2nd reinforcement member 14 Rear seat hinge 21 Load transmission member 22 2nd load transmission member 24 Rear wheel house 28 Vehicle rear seat 30 Seat back 34 Support point 54 Rear seat hinge D Cavity part F Side impact load S Vehicle body Rear structure

Claims (3)

A first reinforcing member that extends in the vehicle longitudinal direction on the vehicle interior side of the rear wheel house and reinforces the rear wheel house;
A second reinforcing member that extends in the vehicle vertical direction on the vehicle interior side of the rear wheel house and is adjacent to or coupled to a rear portion of the first reinforcing member to reinforce the rear wheel house;
A vehicle rear seat disposed between the left and right rear wheel houses and having a seat back capable of transmitting a load in the vehicle width direction;
A rear seat hinge that is rotatably supported with respect to the first reinforcing member and is fixed to the seat back at a position offset from the fulcrum to the vehicle rear side and the vehicle interior side;
A vehicle body rear structure characterized by comprising: On the outer side in the vehicle width direction of the seat back, a gap is provided between the first reinforcing member and the rear seat hinge,
The vehicle body rear part structure according to claim 1, wherein a load transmitting means capable of transmitting a load in the vehicle width direction is provided in the gap. The seat back is configured to be splittable,
The vehicle body rear part structure according to claim 1 or 2, wherein a hinge on the vehicle central side of the seat back is connected to the vehicle body.

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