JP2018138448A - Side part vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a buffer load transmitted to a rear pillar and concurrently inhibit decrease of a riding space located behind the rear pillar.SOLUTION: A side part vehicle body structure of a vehicle includes: a rear frame 46; a roof side rail 2; a rear wheel house 20; a C pillar 4 which extends downward from the roof side rail 2 at a rear end part of a door opening 10 located adjacent to the front side of the rear wheel house 20; and a suspension housing reinforcement 70 which connects the C pillar 4 with the rear wheel house 20. A deformation promotion part 101, which becomes a starting point of bending deformation in a vehicle width direction when a buffer load applied from the rear side to the front side acts during a rear collision, is provided at a rear end part of the suspension housing reinforcement 70.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a side body structure of a vehicle.

  2. Description of the Related Art A side body structure of a vehicle in which a rear pillar extending in a vertical direction and a rear wheel house are connected at a rear edge portion of a door opening by a reinforcing member is known. In Patent Document 1, as a side body structure of a vehicle, a rear pillar extending vertically between a rear wheel house and a roof, a rear pillar extending vertically in a rear edge portion of a door opening, a rear pillar, and a rear pillar are disclosed. And a reinforcing member extending in the front-rear direction.

  The reinforcing member of Patent Document 1 has a cross-sectional shape opened downward in order to facilitate deformation when subjected to a collision load at the time of rear collision. The reinforcing member absorbs the collision load by deforming so as to contract in the front-rear direction at the time of a rear collision, and as a result, the collision load transmitted to the rear pillar is reduced.

JP 2006-103435 A

  In the structure of Patent Document 1, since the reinforcing member receives a collision load at the time of a rear collision and deforms in the front-rear direction, the riding space on the rear side of the rear pillar tends to decrease in the front-rear direction.

  On the other hand, it is also conceivable to suppress the reduction of the riding space at the time of a rear impact by configuring the reinforcing member so as to suppress the deformation by improving the rigidity. However, in this case, the collision load transmitted to the rear pillar increases, and excessive deformation may occur in the rear pillar.

  The present invention has been made in view of the above problem, and can suppress a reduction in the riding space on the rear side of the rear pillar, while reducing the collision load transmitted to the rear pillar, and the vehicle side portion. An object is to provide a vehicle body structure.

  In order to solve the above problems, the present invention is configured as follows.

  The invention according to claim 1 of the present application is a side body structure of a vehicle, wherein a rear frame extending in a front-rear direction at a rear lower portion of the vehicle body, a roof side rail extending in a front-rear direction at an upper side portion of the vehicle body, A rear wheel house located on the outer side in the vehicle width direction of the rear frame and covering a rear wheel, and a rear edge of a door opening adjacent to the front side of the rear wheel house, extends downward from the roof side rail. A rear housing, and a suspension housing rain connecting between the rear pillar and the rear wheel house, and a rear end portion of the suspension housing rain is subjected to a collision load directed from the rear to the front at the time of a rear collision. When this is done, a deformation promoting portion is provided which is a starting point for bending deformation in the vehicle width direction.

  According to a second aspect of the present invention, in the side body structure of the vehicle according to the first aspect, the deformation promoting portion has a high rigidity that is higher than that of the remaining portion of the suspension housing rain. It is characterized by comprising a peripheral part adjacent to the rigid part.

  In addition, the “high rigidity portion” in the present specification means a portion configured to be less likely to be deformed than the surrounding portion. Specific examples of the “highly rigid portion” include a convex portion, a concave portion, a rib, or a thick portion.

  According to a third aspect of the present invention, in the vehicle side part vehicle body structure according to the first aspect, the deformation promoting portion is constituted by a hole.

  According to a fourth aspect of the present invention, in the side body structure of the vehicle according to the first aspect, the deformation promoting portion is constituted by a thin portion.

  According to the invention of each claim of the present application, the following effects can be obtained by the above configuration.

  According to the first aspect of the present invention, at the time of a rear collision, the suspension housing rain and the rear wheel house located on the rear side are caused to be deformed in the vehicle width direction with the deformation promoting portion as a base point. it can. That is, the suspension housing rain and the rear wheel house positioned on the rear side of the deformation promoting portion are configured as a crushable zone, and the deformation of the rear wheel house on the front side of the deformation promoting portion can be suppressed by the suspension housing rain. Further, at the time of rear collision, the collision energy is absorbed by the bending deformation of the deformation promoting portion itself of the suspension housing rain.

  Therefore, at the time of a rear collision, the front side of the deformation promoting portion is preferably absorbed while colliding energy by the deformation of the suspension housing rain and the rear wheel house located on the rear side of the deformation promoting portion and the bending deformation of the deformation promoting portion itself. The suspension of the rear wheel house can be suppressed by the suspension housing rain located at the position. Therefore, it is possible to reduce the collision load transmitted to the rear pillar while suppressing a reduction in the riding space on the rear side of the rear pillar.

  According to the second aspect of the present invention, the portion provided with the high-rigidity portion is higher in rigidity than the portion adjacent to the high-rigidity portion. Stress tends to concentrate. Therefore, when receiving a collision load at the time of rear collision, bending deformation is likely to occur with this portion as a base point. Therefore, the deformation promoting portion can be easily formed around this by the high-rigidity portion, and the amount of energy absorption at the time of rear collision can be increased.

  According to the third aspect of the present invention, the rigidity of the portion provided with the hole is lower than that of the portion adjacent to the hole, so that stress tends to concentrate on the portion provided with the hole. Therefore, when receiving a collision load at the time of rear collision, bending deformation is likely to occur with this portion as a base point. Therefore, the deformation promoting portion can be easily configured by the hole.

  According to the invention described in claim 4, since the rigidity of the portion provided with the thin portion is lower than that of the portion adjacent thereto, stress is concentrated on the portion provided with the thin portion. Cheap. Therefore, when receiving a collision load at the time of rear collision, bending deformation is likely to occur with this portion as a base point. Therefore, the deformation promoting portion can be easily configured by the thin portion.

  That is, according to the side body structure of the vehicle according to the present invention, it is possible to reduce the collision load transmitted to the rear pillar while suppressing a reduction in the riding space on the rear side of the rear pillar.

It is the perspective view which looked at the vehicle body rear part of the motor vehicle provided with the side part vehicle body structure of the vehicle which concerns on one Embodiment of this invention from the vehicle compartment outer side. It is the side view which looked at the vehicle body rear part from the vehicle compartment outer side. It is the perspective view which looked at the vehicle body rear part from the vehicle interior side. It is the perspective view which looked at the bottom face part of the rear part of the vehicle body, and its peripheral part from the vehicle body lower side. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2 when the C pillar and its peripheral part are viewed from the front side of the vehicle body. It is the perspective view which looked at the lower part of C pillar, and its peripheral part from the vehicle compartment outer side. FIG. 3 is a cross-sectional view taken along line B-B in FIG. It is a perspective view which shows the node member for C pillar reinforcement. It is CC sectional view taken on the line of FIG. 5 which looked at an anchor bracket, a node member, and its periphery from the vehicle body upper side. It is a perspective view similar to FIG. 6 which shows the modification of a deformation | transformation promotion part. It is a perspective view similar to FIG. 6 which shows the further modification of a deformation | transformation promotion part.

  Hereinafter, a side body structure of a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each of the attached drawings, the vehicle body structure on one side (the vehicle body right side) in the vehicle body width direction is mainly illustrated, but the other side (the vehicle body left side) is configured similarly. Also, in each figure of the attached drawings, the front / rear, in / out (or left / right), and up / down directions are the vehicle longitudinal direction, the vehicle width direction, and the vehicle vertical direction, respectively. Is shown.

[overall structure]
As shown in FIG. 1 to FIG. 3, the automobile 1 having the side body structure of the vehicle according to the present embodiment extends in the longitudinal direction of the vehicle body along the outer end of the roof panel (not shown) in the vehicle width direction. A pair of left and right roof side rails 2 and a plurality of pillar portions extending in the vertical direction of the vehicle body from the roof side rails 2 toward the vehicle body lower side are provided.

  The plurality of pillar portions are an A pillar (front pillar) and a B pillar (center pillar) (not shown), and a C pillar (quarter pillar) 4 and a D pillar (rear pillar) 6 shown in FIGS. It is configured. In the longitudinal direction of the vehicle body, the A pillar, the B pillar, the C pillar 4 and the D pillar 6 are arranged at intervals in this order from the front side.

  Although illustration of the seat is omitted, the automobile 1 is a so-called three-row seat car. A front door opening (not shown) for the first row seat between the A pillar and the B pillar, and a rear door opening 10 for the second row seat, C pillar between the B pillar and the C pillar 4. A quarter window 12 for the third row seat is provided between 4 and the D pillar 6. That is, the B pillar is located at the rear edge of the front door opening, the C pillar 4 is located at the rear edge of the rear door opening 10, and the D pillar 6 is located at the rear end of the vehicle body. doing.

  The automobile 1 includes a side panel 14 that constitutes a side portion of the vehicle body at a rear side portion of the vehicle body relative to the rear door opening 10 and a rear wheel house 20 that covers the rear wheels. The rear wheel house 20 is provided along the lower edge of the side panel 14. The front lower end portions of the side panel 14 and the rear wheel house 20 are connected to the rear end portion of the side sill 8 extending in the longitudinal direction of the vehicle body.

  The side panel 14 includes an upper panel 16 and a lower panel 18 that are arranged continuously in the vertical direction of the vehicle body. The lower end portion of the upper panel 16 and the upper end portion of the lower panel 18 are joined to each other, for example, by welding.

  The rear wheel house 20 includes a wheel house outer 22 (see FIGS. 1 and 2) that bulges outward from the side panel 14 in the vehicle width direction, and a wheel house inner 26 (see FIG. 1) that bulges from the side panel 14 in the vehicle width direction. 3 and FIG. 4). In FIG. 4, the wheel house outer 22 and the side panel 14 (see FIGS. 1 and 2) are not shown, and the wheel house inner 26 is shown on its outer surface.

  The wheel house outer 22 is provided integrally with the lower panel 18 of the side panel 14, and the wheel house inner 26 is joined to the surface of the lower panel 18 on the vehicle interior side by, for example, welding.

  As shown in FIG. 4, a notch 26 a is provided in the upper portion of the wheel house inner 26, and a suspension housing 30 is joined to the wheel house inner 26 so as to close the notch 26 a from above the vehicle body. A suspension portion 31 to which an upper end portion of a rear wheel suspension member (not shown) is fixed is provided at a portion from the rear side of the suspension housing 30. The suspension portion 31 is configured as a flat portion extending in a substantially horizontal direction and is formed in an elliptical shape that is long in the front-rear direction in plan view. Fastened and fixed.

  As shown in FIG. 3, a suspension housing gusset 32 is joined to the upper portion of the wheel house inner 26 via a suspension housing 30. More specifically, the suspension housing gusset 32 is positioned corresponding to the suspension portion 31, that is, joined to a portion from the rear side of the suspension housing 30. A pair of front and rear flange portions 32a and 32b joined to the wheel house inner 26 or the suspension housing gusset 32 and a flange joined to the vehicle interior side surface of the lower panel 18 of the side panel 14 are provided at the peripheral portion of the suspension housing gusset 32. A portion 32c is provided. That is, the suspension housing gusset 32 is provided across the wheel house inner 26 (part from the rear side of the suspension housing 30) and the side panel 14.

  A side brace 56 is disposed adjacent to the front side of the vehicle body of the suspension housing gusset 32. The side brace 56 is a connecting member that connects a cross member 53 described later to the C pillar 4 side.

  The side brace 56 is a long member having a hat-shaped cross section that opens to the vehicle body lower side or the vehicle body width direction outer side. The side brace 56 is disposed so that the outer portion in the vehicle body width direction is located on the upper side of the vehicle body compared to the inner portion. The side brace 56 is joined to the cross member 53 at the inner end in the vehicle body width direction, and joined to the surface of the side panel 14 (lower panel 18) on the vehicle interior side at the outer end in the vehicle body width direction. In the direction portion, the wheel house inner 26 and the portion from the front side of the suspension housing 30 are joined by welding, for example.

  Referring also to FIG. 7, the suspension housing gusset 32 and the side brace 56 are joined to the upper portion of the suspension housing 30 in the longitudinal direction of the vehicle body.

  As shown in FIGS. 3 and 4, the rear panel of the automobile 1 has a floor panel 40 constituting a floor surface of a passenger compartment portion where the second row seat and the third row seat are disposed, A pair of left and right side frames 44 extending in the longitudinal direction of the vehicle body along the side portions, and a plurality of cross members 51, 52, 53, 54 provided between the left and right side frames 44 along the floor panel 40 are provided. .

  The floor panel 40 is provided with a step portion 41 for arranging a portion corresponding to the third row sheet higher than a portion corresponding to the second row sheet. The side frame 44 includes a main frame 45 extending substantially horizontally in the vehicle body front-rear direction on the inner side in the vehicle body width direction of the side sill 8 (FIG. 2), and a rear frame 46 extending in the front-rear direction at the rear lower portion of the vehicle body. And have. The rear frame 46 is positioned substantially corresponding to the third row seat in a side view of the vehicle body, and is joined to the outer side surface by, for example, welding so that the wheel house inner 26 continuously protrudes outward. Further, the floor panel 40 is provided with a tire pan 42 that bulges to the lower side of the vehicle body at a rear side portion of the vehicle body with respect to the step portion 41.

  A kick-up portion 47 is provided at the front end portion of the rear frame 46 in accordance with the step portion 41 of the floor panel 40. The kick-up portion 47 is disposed so as to extend in a direction inclined toward the vehicle body upper side toward the vehicle body rear side. The side frame 44 has curved portions 48 and 49 at the front end portion and the rear end portion of the kick-up portion 47. In the longitudinal direction of the vehicle body, the front curved portion 48 is disposed on the front side of the rear wheel house 20, and the rear curved portion 49 is disposed on the rear side of the front end of the rear wheel house 20. The front curved portion 48 is located between the main frame 45 and the rear frame 46.

  The plurality of cross members 51, 52, 53, 54 are positioned in front of the front bending portion 48, positions between the front and rear bending portions 48, 49, and positions overlapping the rear bending portion 49 in the vehicle longitudinal direction. The rear curved portion 49 is provided at a position behind the rear curved portion 49. Each cross member 51, 52, 53, 54 is disposed so as to extend in the vehicle body width direction.

  As shown in FIG. 3, the automobile 1 includes a seat belt device 80 for each seat. The seat belt device 80 shown in FIG. 3 is a three-point seat belt device for the second row seat.

  The seat belt device 80 includes, for example, an anchor 81 fixed to the side frame 44, a through anchor 82 fixed to the C pillar 4, and a belt (webbing) inserted through the through anchor 82 and fixed to the anchor 81 at one end. 83, a tongue plate 84 slidably attached to the belt 83 between the anchor 81 and the through anchor 82, and a buckle (not shown) provided on the seat so as to be engageable with the tongue plate 84 And a retractor (seat belt retractor) 85 for winding the belt 83 from the other end side.

  The retractor 85 is, for example, an emergency lock type retractor (ELR) that locks the belt when a collision is detected based on the tilt of the vehicle body, the deceleration of the vehicle, the speed of pulling out the belt, and the like. A pretensioner 86 is attached to the retractor 85. The retractor 85 is disposed inside the C pillar 4 on the vehicle body lower side than the through anchor 82.

[C pillar]
As shown in FIG. 5, the C pillar 4 includes a pillar inner 60 that forms a surface of the C pillar 4 on the vehicle interior side, and a pillar outer 64 that is joined to the outside of the vehicle interior of the pillar inner 60. By the pillar inner 60 and the pillar outer 64, the C pillar 4 is formed in a closed cross-sectional structure that is continuous in the vertical direction of the vehicle body.

  The pillar inner 60 includes a pillar inner upper 61 and a pillar inner lower 62 connected to the pillar inner upper 61 on the vehicle body lower side.

  As shown in FIG. 3, the pillar inner upper 61 is provided integrally with the upper panel 16 of the side panel 14. The pillar inner upper 61 is formed of a belt-like portion extending in the vehicle body vertical direction at the front end portion of the upper panel 16, and a notch 61 a is formed in the lower end portion of the pillar inner upper 61. The pillar inner lower 62 is constituted by a part of the lower panel 18 of the side panel 14, and a notch 62 a is formed at the upper end portion of the pillar inner lower 62.

  The notch 61a of the pillar inner upper 61 and the notch 62a of the pillar inner lower 62 are aligned in the longitudinal direction of the vehicle body. Accordingly, the pillar inner 60 is formed with a substantially rectangular opening 63 formed by combining the pair of notches 61a and 62a.

  As shown in FIGS. 2 and 5, the pillar outer 64 is a long member that extends in the vertical direction of the vehicle body along the outer surface of the pillar inner 60. The upper end portion of the pillar outer 64 is joined to the roof side rail 2 by welding, for example, and the lower end of the pillar outer 64 is spaced apart from the rear wheel house 20 to the upper side of the vehicle body.

  As shown in FIG. 9, the pillar outer 64 is formed in a cross-sectional hat shape that opens toward the inner side in the vehicle body width direction. The pillar outer 64 includes a side surface portion 64a facing the outer side in the vehicle width direction of the pillar inner 60, a front surface portion 64b extending inward in the vehicle body width direction from an edge portion on the vehicle body front side of the side surface portion 64a, and an edge portion on the vehicle body rear side of the side surface portion 64a. A rear surface portion 64c extending inward in the vehicle body width direction, a front flange portion 64d extending from the inner edge of the front surface portion 64b in the vehicle width direction to the front side of the vehicle body, and an edge portion of the rear surface portion 64c inward of the vehicle body width direction from the vehicle body rear side. An extending rear flange portion 64e is provided.

  The pillar outer 64 is joined to the outer surface of the pillar inner 60 by, for example, welding at the front flange portion 64d and the rear flange portion 64e. The front flange portion 64d and the rear flange portion 64e of the pillar outer 64 are mainly joined to the pillar inner upper 61, but are joined to the pillar inner lower 62 at the lower end thereof.

  That is, as shown in FIG. 5, the C pillar 4 has a closed cross section that extends in the vertical direction from the roof side rail 2 to a position spaced apart from the rear wheel house 20 on the vehicle body upper side. In the space S1 defined inside the C pillar 4, a soundproof member 99 and a node member 90 are arranged with a space in the vertical direction of the vehicle body as partition members for partitioning the space S1 in the vertical direction of the vehicle body. The soundproof member 99 is disposed on the vehicle body upper side with respect to the opening 63 (see FIG. 3) of the pillar inner 60, and the node member 90 is disposed on the vehicle body lower side with respect to the opening 63.

  The soundproof member 99 includes a sound absorbing material 99a that absorbs noise and vibration, and a support material 99b that supports the sound absorbing material 99a. The sound absorbing material 99a is made of, for example, a foamed resin. The support member 99 b is attached across the pillar inner upper 61 and the pillar outer 64.

  The node member 90 is a plate-like reinforcing member disposed in the C pillar 4 in order to suppress cross-sectional deformation of the C pillar 4. A specific configuration of the node member 90 will be described later.

  As shown in FIG. 6, a suspension housing rain 70 is disposed between the C pillar 4 and the upper surface portion of the wheel house outer 22 so as to connect them in the vertical direction. The suspension housing rain 70 is formed in a bifurcated shape that branches in the longitudinal direction of the vehicle body so as to have a front suspension housing rain 71 and a rear suspension housing rain 72 located behind the suspension suspension rain 71.

  The front suspension housing rain 71 extends downward from the lower end portion of the pillar outer 64 to the upper surface portion of the wheel house outer 22 along the extending direction, and the upper end portion and the lower end portion are the lower end portion of the pillar outer 64 and the wheel house outer portion. Each is joined to the upper surface portion of 22 by welding, for example.

  As shown in FIG. 9, the front suspension housing rain 71 is formed in a cross-sectional hat shape that opens toward the inner side in the vehicle body width direction. The front suspension housing rain 71 includes a side portion 71a facing the outer side in the vehicle width direction of the pillar inner 60, a front surface portion 71b extending from the edge of the side surface portion 71a on the vehicle body front side to the vehicle body width direction inner side, and the vehicle body rear side of the side surface portion 71a. A rear surface portion 71c extending inward in the vehicle width direction from the edge of the front portion, a front flange portion 71d extending inward of the vehicle body from the edge in the vehicle width direction of the front surface portion 71b, and an edge portion in the vehicle width direction of the rear surface portion 71c. A rear flange portion 71e extending to the rear side of the vehicle body is provided.

  The front suspension housing rain 71 is joined to the outer surface of the pillar inner lower 62 of the pillar inner 60 by, for example, welding at the front flange portion 71d and the rear flange portion 71e. The front flange portion 71d and the rear flange portion 71e of the front suspension housing rain 71 are mainly joined directly to the pillar inner lower 62, but at the upper end thereof, the pillar inner via the flange portions 64d and 64e of the pillar outer 64. It is joined to the lower 62.

  At the upper end portion of the front suspension housing rain 71, the side surface portion 71a, the front surface portion 71b and the rear surface portion 71c are respectively welded to the outer sides of the side surface portion 64a, the front surface portion 64b and the rear surface portion 64c at the lower end portion of the pillar outer 64, for example. It is joined.

  As shown in FIGS. 1 and 6, at the lower end portion of the front suspension housing rain 71, the front flange portion 71 d and the rear flange portion 71 e are curved outward in the vehicle body width direction, and the wheel house outer 22 It is joined to the upper surface part by welding, for example.

  As shown in FIG. 6, the rear suspension housing rain 72 connects the rear portion of the C pillar 4 (pillar outer 64) and the front suspension housing rain 71 and the upper surface portion of the wheel house outer 22 in a brace shape. On the rear side of the front suspension housing rain 71, the rear suspension is inclined downward and extends downward. The rear suspension housing rain 72 has an L-shaped cross section including a side surface 73 facing the outer side in the vehicle width direction of the side panel 14 and a rear surface portion 74 extending inward in the vehicle width direction from the rear edge of the side surface 73. Is formed.

  The side surface portion 73 extends from the upper end portion disposed substantially flush with the lower edge portion of the quarter window 12 to the upper surface portion of the wheel house outer 22 in a direction inclined rearward downward. The side surface portion 73 is joined to the upper panel 16 and the wheel house outer 22 by spot welding at the upper end portion and the lower end portion, respectively.

  As shown in FIG. 2, a high-rigidity portion 79 extending in a direction inclined upward toward the rear is formed at the rear lower end portion of the side surface portion 73. The high rigidity portion 79 is configured as a bead that bulges outward in the vehicle body width direction. In the side surface portion 73, the portion provided with the high-rigidity portion 79 has higher rigidity than the portion adjacent to the side portion 73, so that stress is likely to concentrate on the portion adjacent to the high-rigidity portion 79 among the remaining portions.

  Here, when the rear wheel house 20 receives a collision load directed forward at the time of a rear collision, stress concentrates on the rear edge of the high-rigidity portion 79, and the edge serves as a base in the vehicle width direction. It is easy to bend and deform. Therefore, a portion that is located around the high-rigidity portion 79 (for example, the rear edge) forms a deformation promoting portion 101 that becomes a starting point for bending deformation of the rear wheel house 20 in the vehicle width direction at the time of a rear collision. . Since the high-rigidity portion 79 is inclined upward toward the rear, the deformation promoting portion 101 is also configured to be inclined upward toward the rear.

  More specifically, the first imaginary line L1 obtained by extending the deformation promoting portion 101 forward in a vehicle body side view is inclined downward and extends forward, and the kick-up portion 47 of the side frame 44 is extended. It passes through the curved portion 48 located on the front side. The first imaginary line L1 is located at the imaginary point P1 located at the rearmost end portion of the side surface portion 73 and the rear lower portion of the rear wheel house 20 (wheel house outer 22), preferably at the rear end portion and the lower end portion. It is substantially orthogonal to the second virtual line L2 connecting the virtual point P2 to be performed. The second imaginary line L2 extends in a direction inclined upward toward the front, and is generally parallel to the extending direction of the side surface portion 73. In addition, the rear lower portion of the rear wheel house 20 is a portion located substantially in the lower half of the rear wheel house 20 in the rear portion of the rear wheel house 20, as indicated by a broken line in FIG. Shall mean.

  Moreover, the lower end part of the side part 73 is joined to the wheel house outer 22 not only in the part which overlaps with the suspension part 31 but in the part located in this back side by the vehicle body side view. The deformation promoting part 101 is configured on the rear side of the suspension part 31 in the longitudinal direction of the vehicle body.

  As shown in FIG. 6, a plurality of openings 73 a are formed in the side surface portion 73. The plurality of openings 73a are formed in consideration of the weight reduction of the rear suspension housing rain 72 and workability at the time of assembling each member (for example, insertability such as a spot welding gun or jig). A bead portion 73b for reinforcing the opening edge is formed around the opening 73a.

  Further, at the lower end portion of the side surface portion 73, a portion joined to the wheel house outer 22 is formed with a bead portion 73c that bulges outward in the vehicle body width direction, except for a spot welded portion. The lower edge portion of the side surface portion 73 is reinforced by the bead portion 73c. Furthermore, since the lower edge part of the side part 73 is partially joined to the wheel house outer 22 by the bead part 73c, it is easy to follow the wheel house outer 22.

  The rear suspension housing rain 72 is joined to the front side of the vehicle body of the side surface portion 73 across the pillar outer 64 and the side surface portions 64a and 71a of the front suspension housing rain 71 by spot welding from the outside in the vehicle width direction. A flange portion 76 is further provided.

  Here, the pillar outer 64 and the front suspension housing rain 71 have the side surface portions 64a and 71a located outside the quarter window 12 in the vehicle body width direction. Therefore, the position in the vehicle body width direction is different between the side surface portion 73 of the rear suspension housing rain 72, the pillar outer 64, and the side surface portions 64 a and 71 a of the front suspension housing rain 71. Specifically, the side surface 73 of the rear suspension housing rain 72 is located on the inner side in the vehicle body width direction with respect to the pillar outer 64 and the side surfaces 64 a and 71 a of the front suspension housing rain 71.

  Therefore, the front flange portion 76 is located on the outer side in the vehicle width direction from the side surface portion 73 via the step surface portion 75 in order to eliminate the difference in position in the vehicle body width direction between the side surface portion 73 and the side surface portions 64a and 71a. It is configured. Between the side surface portion 73 and the stepped surface portion 75, two high-rigidity portions 78 extending in the vehicle body front-rear direction are formed at positions spaced vertically.

  Referring also to FIG. 9, the high-rigidity portion 78 is configured as a so-called triangular rib that protrudes in a triangular shape when viewed from above at the corner between the side surface portion 73 and the step surface portion 75. The rigidity in the vehicle body width direction of the front flange portion 76 is increased by the high rigidity portion 78, and thereby the rigidity in the joint portion between the rear suspension housing rain 72, the pillar outer 64, and the front suspension housing rain 71 is increased. ing.

  In the front flange portion 76, spot welded portions are recessed inward in the vehicle body width direction and are formed along the pillar outer 64 and the side surface portions 64 a and 71 a of the front suspension housing rain 71, respectively.

  The rear suspension housing rain 72 has a rear flange portion 77 extending from the inner edge of the rear surface portion 74 in the vehicle width direction to the vehicle body rear side. The rear flange portion 77 extends in the vehicle body vertical direction along the outer surface of the side panel 14, and is curved outward in the vehicle body width direction so that the lower end portion is along the upper surface portion of the wheel house outer 22. The rear flange portion 77 has a plurality of extended flange portions 77a that are partially expanded on the vehicle body rear side.

  The rear flange portion 77 is joined to the side panel 14 and the wheel house inner 26 by, for example, spot welding in a plurality of extended flange portions 77a. Specifically, the plurality of extended flange portions 77 a are provided at two locations at the junction with the upper panel 16, at one location at the junction between the upper panel 16 and the lower panel 18, and at one location at the junction with the lower panel 18. It is provided at one place at the joint with the wheel house outer 22.

  The extended flange portion 77a located at the joint portion with the lower panel 18 faces the rear flange portion 32b or the upper flange portion 32c of the suspension housing gusset 32 located on the inner side in the vehicle width direction with the lower panel 18 interposed therebetween. It is formed wider than other expansion flange portions 77a so as to be positioned. The extended flange portion 77a and the flange portions 32b and 32c of the suspension housing gusset 32 are joined by spot welding at a plurality of points in a state where three pieces are sandwiched with the lower panel 18 in between.

  Referring also to FIG. 7, the front suspension housing rain 71 is located opposite to the side brace 56 with the lower panel 18 interposed therebetween. That is, the rear wheel house 20 includes a side brace 56 and a front suspension housing rain 71 disposed on both sides in the vehicle body width direction with the lower panel 18 sandwiched between the portions where the suspension housing 30 is provided. The rear part is supported by a suspension housing gusset 32 and a rear suspension housing rain 72 disposed on both sides in the vehicle body width direction with the lower panel 18 interposed therebetween.

  Accordingly, the suspension housing 30 is firmly supported in the longitudinal direction of the vehicle body by the suspension housing gusset 32, the side brace 56, the front suspension housing rain 71, and the rear suspension housing rain 72.

A load input transmitted from the suspension member to the suspension housing 30 via the suspension portion 31 is efficiently transmitted from the expansion flange portion 77a to the rear suspension housing rain 72 via the suspension housing gusset 32. . Further, as described above, since the joint portion of the rear suspension housing rain 72 to the wheel house outer 22 is located overlapping the suspension portion 31 in the side view of the vehicle body, the load input from the suspension member is It is more efficiently transmitted from the top portion 31 to the rear suspension housing rain 72.
[Node members]
The node member 90 and the configuration related thereto will be described with reference to the perspective view of the node member 90 shown in FIGS. 8A and 8B and the cross-sectional view of the C pillar 4 shown in FIG.

  As shown in FIG. 8A and FIG. 8B, the node member 90 is provided at the partition wall portion 91 that partitions the space S <b> 1 inside the C pillar 4 in the vehicle body vertical direction, and at the peripheral edge portion of the partition wall portion 91. A plurality of flange portions 93, 94, 95, 96.

  The partition wall portion 91 is disposed along a plane that intersects the vehicle body vertical direction. More specifically, the partition wall portion 91 is disposed along a plane substantially perpendicular to the length direction of the C pillar 4. The partition wall 91 has a substantially trapezoidal shape in accordance with the closed cross-sectional shape of the C pillar 4 (see FIG. 9). The inner edge of the partition wall 91 in the vehicle width direction is formed to be long and parallel to the outer edge in the vehicle width direction.

  For example, one bead 92 is formed in the partition wall portion 91. The bead 92 is formed so as to bulge from the partition wall portion 91 to the vehicle body lower side, for example. The bead 92 is elongated so as to extend in the vehicle body width direction.

  The plurality of flange portions 93, 94, 95, 96 of the node member 90 are provided at the outer flange portion 93 provided at the outer edge portion of the node member 90 in the vehicle width direction and at the edge portion of the node member 90 on the vehicle body front side. A front flange portion 94, a rear flange portion 95 provided at an edge of the node member 90 on the vehicle body rear side, and an inner flange portion 96 provided at an edge portion of the node member 90 on the inner side in the vehicle width direction. Have.

  The outer flange portion 93, the front flange portion 94, and the rear flange portion 95 are provided so as to protrude from the partition wall portion 91 to the vehicle body upper side. The outer flange portion 93 is provided so as to be integrally connected to each of the front flange portion 94 and the rear flange portion 95.

  The inner flange portion 96 is provided so as to protrude from the partition wall portion 91 to the vehicle body lower side. A notch 96 a is provided at the rear end portion of the inner flange portion 96. Further, the inner flange portion 96 has an extension portion 96b that increases the amount of protrusion toward the vehicle body lower side. The extension part 96b is disposed adjacent to the front side of the notch 96a in the longitudinal direction of the vehicle body.

  In the corner portion between the partition wall portion 91 and the inner flange portion 96, for example, a pair of high-rigidity portions 97 and 98 are provided. The pair of high-rigidity parts 97 and 98 are disposed with a space in the front-rear direction of the vehicle body. Each of the high-rigidity portions 97 and 98 is configured by a bead that bulges downward on the vehicle body, for example. By providing these high-rigidity portions 97 and 98, the node member 90 is effectively suppressed from being bent and deformed at the corner portion between the partition wall portion 91 and the inner flange portion 96.

  As shown in FIG. 9, the node member 90 is joined to the pillar outer 64 of the C pillar 4 at the outer flange portion 93, the front flange portion 94, and the rear flange portion 95. More specifically, for example, the outer flange portion 93, the front flange portion 94, and the rear flange portion 95 of the node member 90 are joined to the joint portion between the lower end portion of the pillar outer 64 and the upper end portion of the front suspension housing rain 71. Has been.

  At the joint between the lower end portion of the pillar outer 64 and the upper end portion of the front suspension housing rain 71, for example, the front suspension housing rain 71 is overlapped on the outside of the pillar outer 64.

  Further, on the inner side of the side surface portion 64a, the front surface portion 64b, and the rear surface portion 64c at the lower end portion of the pillar outer 64, an outer flange portion 93, a front flange portion 94, and a rear flange portion 95 of the node member 90 are disposed so as to overlap each other. In these overlapping portions, the flange portions 93, 94, 95 of the joint member 90, the pillar outer 64, and the front suspension housing rain 71 are in a three-layered state.

  The node member 90 is fixed by being welded in a three-ply state to the pillar outer 64 and the front suspension housing rain 71 at the outer flange portion 93, the front flange portion 94, and the rear flange portion 95. Yes.

  As described above, the node member 90 is bonded to a plurality of surfaces including a pair of surfaces (front surface portions 64b and 71b and rear surface portions 64c and 71c) facing each other in the C pillar 4, whereby the C pillar 4 It is firmly fixed against. Therefore, by providing the node member 90 in this way, collapse of the closed cross section of the C pillar 4 is effectively suppressed.

  The node member 90 may be joined to the pillar inner lower 62 at the inner flange portion 96 by welding, for example. Specifically, for example, the vehicle body front side portion of the inner flange portion 96 may be joined to the peripheral portion of the notch 62a in the pillar inner lower 62.

[Retractor support structure]
As schematically shown in FIG. 5, the retractor 85 is attached to the pillar inner lower 62 by the anchor bracket 100, and the vehicle body upper and lower between the soundproof member 99 and the node member 90 in the space S <b> 1 inside the C pillar 4. It is arranged at a directional position. The retractor 85 is partially disposed in the space S <b> 1 of the C pillar 4, and the remaining portion of the retractor 85 is disposed so as to protrude from the opening 63 of the pillar inner 60 toward the vehicle interior side.

  In this way, by arranging the retractor 85 using the space S1 of the C pillar 4, the C pillar 4 can be compared to the case where the entire retractor 85 is disposed closer to the vehicle interior side than the C pillar 4. And a pillar trim (not shown) covering this from the vehicle interior side, the space required for housing the retractor 85 is reduced. Therefore, the pillar trim can be disposed close to the outer side in the vehicle body width direction, and thereby, a living space for the occupant of the third row seat can be secured widely in the vehicle body width direction.

  According to the side vehicle body structure configured as described above, the rear suspension housing rain 72 and the rear wheel house 20 located on the rear side of the deformation promoting portion 101 are used in the vehicle width direction at the time of a rear collision. Can cause deformation. That is, while the rear suspension housing rain 72 and the rear wheel house 20 positioned on the rear side of the deformation promoting portion 101 are configured as a crushable zone, the deformation of the rear wheel house 20 on the front side of the deformation promoting portion 101 is changed to the suspension housing. It can be suppressed by rain 70. Further, at the time of a rear collision, the collision energy is absorbed by the bending deformation of the deformation promoting portion 101 itself of the rear suspension housing rain.

  Therefore, at the time of a rear collision, while suitably absorbing the collision energy by the deformation of the rear suspension housing rain 72 and the rear wheel house 20 located on the rear side of the deformation promoting portion 101 and the deformation of the deformation promoting portion 101 itself, Deformation of the rear wheel house 20 can be suppressed by the suspension housing rain 70 located on the front side of the deformation promoting portion 101. Therefore, it is possible to reduce the collision load transmitted to the C pillar 4 while suppressing a decrease in the riding space on the rear side of the C pillar 4.

  Further, the deformation promoting portion 101 extends in a direction inclined upward toward the rear. Here, the side frame 44 is formed with a curved portion 48 that is curved upward between the main frame 45 and the rear frame 46, and at the time of a rear collision, the rear frame 46 has a front portion with the curved portion 48 as a base point. Deformation that rotates upward tends to occur. In this case, the rear wheel house 20 is deformed so as to be compressed in a direction inclined upward from the rear lower portion toward the front. On the other hand, in the rear suspension housing rain 72, the first imaginary line L1 obtained by extending the deformation promoting portion 101 forward passes through the curved portion 48. While effectively deforming the rear wheel house 20 positioned, deformation of the rear wheel house 20 positioned in front of the first imaginary line L1 can be suppressed.

  Therefore, the deformation suppression portion and the crushable zone of the rear wheel house 20 can be set separately above and below (front and rear) the first virtual line L1.

  In addition, since the deformation promoting portion 101 extends obliquely upward toward the rear, the lower end portion of the rear suspension housing rain 72 is positioned forwardly above the deformation promoting portion 101 and is deformed at the time of a rear collision. The resisting part and the crushable zone located rearward and lower than the deformation promoting portion 101 are overlapped in the front-rear direction. As a result, the rear suspension housing rain 72 is greatly configured in the front-rear direction and the up-down direction to improve rigidity, but it is easy to ensure a large crushable zone of the rear wheel house 20 in the front-rear direction by overlapping this. In other words, the support of the wheel house outer 22 by the rear suspension housing rain 72 and the absorption of the collision energy by the rear wheel house 20 can be highly compatible.

  The longest part of the crushable zone of the rear wheel house 20 (the phantom point P1 located at the rear end of the rear suspension housing rain 72 and the rear lower part of the rear wheel house 20 in the vehicle body side view, preferably The deformation promoting portion 101 of the rear sus-housing rain 72 is set so as to be substantially orthogonal to the portion along the second imaginary line L2 connecting the imaginary point P2 located at the rear end portion and the lower end portion. That is, the rear suspension housing rain 72 is formed on the upper front side while the crushable zone is configured to be longer in the direction inclined upward toward the front (the direction in which the front end of the rear frame 46 pivots forward and upward). Can be made to act efficiently adjacent to the crushable zone.

  Further, the second imaginary line L2 extends obliquely upward toward the front, and is substantially parallel to the extending direction of the rear suspension housing rain 72 (side surface portion 73). Accordingly, the rear wheel house 20 has a crushable zone that is longer in the direction in which the second imaginary line L2 extends, and the rear wheel that advances along the second imaginary line L2 by the rear suspension housing rain 72 that extends in this direction. The rear suspension housing rain 72 can effectively act against deformation of the house 20.

  Further, the deformation promoting portion 101 can be easily formed around the high rigidity portion 79. In addition, the high rigidity portion 79 can effectively improve the rigidity of the rear suspension housing rain 72 on the front side of the deformation promoting portion 101.

  Further, when a forward load is input to the rear wheel house 20 via the rear frame 46 at the time of a rear collision, the suspension housing rain 70 disposed between the wheel house outer 22 and the pillar outer 64 is vertically moved. Acts like a stretch. Further, since the suspension housing rain 70 is formed in a bifurcated shape having a front suspension housing rain 71 and a rear suspension housing rain 72 positioned behind the suspension housing rain 70, the wheel house outer 22 is positioned upward in a wider range in the front-rear direction. It is supported from. As a result, at the time of the rear collision, the upward deformation of the rear wheel house 20 is suitably suppressed by the suspension housing rain 70, and the decrease in the vertical direction of the passenger compartment space is suppressed.

  Further, since the load input to the rear wheel house 20 can be transmitted and dispersed to the roof side rail 2 via the C pillar 4 from the suspension housing rain 70 configured in a bifurcated shape in the wheel house outer 22. The deformation of the rear wheel house 20 can be further suppressed.

  Further, the suspension housing rain 70 is formed in a bifurcated shape so as to have a front suspension housing rain 71 and a rear suspension housing rain 72, whereby the rear wheel house 20 is disposed above this by a separate path. The suspension housing rain 70 can be prevented from increasing in size as compared with a case where it is connected to a skeleton portion (for example, the roof side rail 2 and the C pillar 4).

  Further, the front flange portion 76 of the rear suspension housing rain 72 is enhanced in rigidity in the vehicle width direction by the high rigidity portion 78. As a result, the rear suspension housing rain 72 is restrained from deforming the front flange portion 76 at the joint portion between the C pillar 4 and the front suspension housing rain 71, and therefore, the rear suspension housing rain 72 is changed from the C pillar 4 and the front suspension. A load can be efficiently transmitted to the housing rain 71. As a result, the load transmitted from the rear wheel house 20 to the rear suspension housing rain 72 can be distributed to the pillar outer 64, the front suspension housing rain 71, and the roof side rail 2 side while suppressing loss. The upward deformation of the rear wheel house 20 can be further suppressed.

  Therefore, the collision load (energy) at the time of the rear collision is suitably absorbed and reduced by the rear wheel house 20, and is suitably supported by the rear suspension housing rain 72 with improved rigidity, while being appropriately supported by the C pillar 4 side. Is transmitted to. Therefore, it is possible to reduce the collision load transmitted to the C pillar 4 while suppressing a decrease in the riding space on the rear side of the C pillar 4.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  In the above-described embodiment, the deformation promoting portion 101 is configured by a portion adjacent to the rear side of the high-rigidity portion 79. However, when a collision load is applied from the rear to the front at the time of a rear collision, Any material can be used as long as it becomes a starting point of bending deformation.

  For example, as shown in FIG. 10, the deformation promoting portion 101 may be configured by a hole portion 102 (opening portion) formed in the rear end portion of the side surface portion 73 of the rear suspension housing rain 72. The hole 102 extends in a direction inclined upward toward the rear. The side surface portion 73 of the rear suspension housing rain 72 is relatively weak in rigidity at the portion where the hole portion 102 is formed, so that stress tends to concentrate on the hole portion 102. Therefore, the deformation promoting portion 101 is configured as a starting point of the bending deformation in the vehicle width direction along the extending direction of the hole portion 102 when receiving a forward collision load at the time of rear collision. Moreover, the deformation promotion part 101 can be easily comprised by the hole part 102. FIG.

  Further, as shown in FIG. 11, the deformation promoting portion 101 may be constituted by a thin portion 103 provided at the rear end portion of the side surface portion 73 of the rear suspension housing rain 72. A boundary portion between the thin portion 103 and the remaining portion is inclined upward toward the rear. In the side surface portion 73 of the rear suspension housing rain 72, stress tends to concentrate on the boundary portion between the portion where the thin portion 103 is provided and the remaining portion.

  Therefore, the deformation promoting portion 101 is formed as a starting point of the bending deformation in the vehicle width direction along the boundary portion between the thin portion 103 and the remaining portion when a forward collision load is received during the rear collision. Moreover, the deformation promotion part 101 can be easily comprised by the thin part 103. FIG. Note that the thin portion 103 may be provided on the entire rear lower end portion of the side surface portion 73. Moreover, as shown by a two-dot chain line in the cross section aa in FIG. 11, the thin portion 103 may be formed as a groove 104 extending along the first imaginary line L1.

  In addition, the deformation promoting portion 101 may be configured by a slit instead of the hole portion 102. Further, by forming a notch (notch) extending along the first imaginary line L1 at the lower edge of the rear suspension housing rain 72, stress may be concentrated in the cross section where the notch is formed.

  Moreover, although the above-mentioned embodiment demonstrated the example which comprised the highly rigid part 78 provided between the side part 73 and the level | step difference surface part 75 of the rear part suspension housing rain 72 with the triangular rib, a convex part, A bead portion may be provided by a concave portion or the like, or the thickness may be partially increased, or a member formed separately may be joined in a brace shape. In short, what is necessary is just to improve the bending rigidity between the side surface part 73 and the level | step difference surface part 75. FIG. Similarly, a high rigidity portion may be provided between the step surface portion 75 and the front flange portion 77, and a high rigidity portion may be provided across the side surface portion 73, the step surface portion 75, and the front flange portion 77. .

  In the above-described embodiment, the example in which the high-rigidity portion 79 is configured by a bead has been described. However, a bead portion may be provided by a convex portion, a concave portion, or the thickness may be partially increased. Good.

  In the above-described embodiment, the C pillar 4 includes the pillar inner 60 and the pillar outer 64, and the pillar inner 60 is further divided into the pillar inner upper 61 and the pillar inner lower 62. You may comprise by one member. Further, the front suspension housing rain 71 continuous to the lower side may be integrated with the pillar outer 64 to be configured as one member, and further, the suspension housing rain 70 may be integrated with the pillar outer 64 as one member. It may be configured.

  In the above-described embodiment, the C pillar 4 is configured by the pillar inner 60 and the pillar outer 64. However, the C pillar 4 including the front suspension housing rain 71 continuously extending below the C pillar 4 is referred to as a C pillar. Also good. In this case, it can be considered that the front suspension housing rain 71 is integrated with the C pillar.

  In the above embodiment, the rear suspension housing rain 72 is connected to the pillar outer 64 and the rear portion of the front suspension housing rain 71. However, the rear suspension housing rain 72 is connected to the pillar outer 64 and the front suspension housing rain 71. You may comprise so that it may connect to any one of 71.

  Furthermore, in the above-described embodiment, the present invention has been described by taking a three-row seat car as an example. However, in the present invention, the number of seat rows in the vehicle is not particularly limited. The present invention can be similarly applied to a two-row seat car. In this case, the present invention can be suitably implemented around the periphery of the pillar portion (rear pillar) extending in the vertical direction at the rear edge portion of the door opening located adjacent to the front of the rear wheel house 20.

  As described above, according to the present invention, it is possible to reduce the collision load transmitted to the rear pillar while suppressing a reduction in the riding space on the rear side of the rear rear pillar. There is a possibility of being suitably used in the manufacturing industry of automobiles having a structure.

1 Car 2 Roof Side Rail 4 C Pillar (Rear Pillar)
12 Quarter window 14 Side panel 20 Rear wheel house 22 Wheel house outer 26 Wheel house inner 30 Suspension housing 31 Sustop section 32 Suspension housing gusset 45 Main frame 46 Rear frame 48 Curved section 56 Side brace 60 Pillar inner 61 Pillar inner upper 62 Pillar inner Lower 63 Opening 64 Pillar outer 70 Suspension housing rain 71 Front suspension housing rain 72 Rear suspension housing rain 78 High rigidity portion 79 High rigidity portion 80 Seat belt device 85 Retractor 90 Joint member (partition member)
101 Deformation promotion part

Claims (4)

A rear frame extending in the front-rear direction at the rear lower part of the vehicle body;
A roof side rail extending in the front-rear direction on the upper side of the vehicle body;
A rear wheel house located outside the rear frame in the vehicle width direction and covering the rear wheel;
A rear pillar extending downward from the roof side rail at the rear edge of the door opening adjacent to the front side of the rear wheel house;
A suspension housing rain connecting between the rear pillar and the rear wheel house,
The rear end portion of the suspension housing rain is provided with a deformation promoting portion that is a starting point for bending deformation in the vehicle width direction when a collision load is applied from the rear to the front in the case of a rear collision. Body structure. The deformation promoting portion is constituted by a peripheral portion adjacent to a high-rigidity portion whose rigidity is increased compared to the remaining portion of the suspension housing rain.
The side body structure of the vehicle according to claim 1. The deformation promoting part is constituted by a hole,
The side body structure of the vehicle according to claim 1. The deformation promoting part is constituted by a thin part,
The side body structure of the vehicle according to claim 1.

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