JP2019123456A - Rear part vehicle body structure of vehicle - Google Patents

Abstract

To provide a rear part vehicle body structure of a vehicle 1 which enables upper ends of rear suspension dampers 2 to be coupled to rear side frames 190 and enables improvement of support rigidity of the rear suspension dampers 2.SOLUTION: A rear part vehicle body structure of a vehicle 1 includes: a pair of left and right rear side frames 190 to which upper ends of rear suspension dampers 2 are coupled. The rear side frames 190 include: damper support members 240 which support the rear suspension dampers 2 in desired positions located at the vehicle rear side of and above a pair of left and right side sills 110; inclined frame parts 191 which extend from the side sills 110 to the vehicle rear upper side and in which the damper support members 240 are disposed at upper ends; and a pair of left and right horizontal frame parts 192 which are coupled to the inclined frame parts 191 and extend to the vehicle rear side. The rear part vehicle body structure of the vehicle 1 includes a pair of left and right first reinforcement frames 290, each of which couples a portion of the horizontal frame part 192 located at the vehicle rear side relative to the damper support member 240 to the damper support member 240.SELECTED DRAWING: Figure 2

Description

  The present invention relates to, for example, a rear body structure of a vehicle such as a space frame structure in which a rear body of the vehicle is constructed by assembling frame members.

  A vehicle such as a car is provided with a rear suspension damper that suppresses the vertical movement of the vehicle body by expanding and contracting according to the unevenness of the road surface, for example, to secure the riding comfort to the occupant. In this rear suspension damper, the load input through the rear wheel acts on the upper end thereof, so it is necessary to connect the upper end to the high rigidity portion of the vehicle body to secure the support rigidity.

  For example, Patent Document 1 discloses a rear side frame (rear side member) in a vehicle having a space frame structure including a reinforcing frame (rear shock absorber mounting reinforcing member 30) on the upper surface of a rear side frame (rear side member 10) extending in the vehicle longitudinal direction. A rear vehicle body structure of a vehicle is described in which the upper end of a rear suspension damper is connected to a connecting portion between the vehicle 10) and a reinforcing frame (rear shock absorber mounting reinforcing member 30). In this manner, the cited document 1 secures the support rigidity of the rear suspension damper by connecting the rear suspension damper to the rear side frame that is a frame member that constitutes the vehicle body of the vehicle.

  By the way, the rear suspension damper is likely to be disposed at a high position at the upper end in the vehicle vertical direction in order to secure stretchability in the vehicle vertical direction. Therefore, when the rear suspension damper is connected to the rear side frame, the position of the rear side frame is also positioned above the vehicle.

  However, generally, at the rear end of the rear side frame, as a collision load absorbing member for absorbing a collision load at the time of rear collision, a crash can extending in the longitudinal direction of the vehicle and a rear end of the crash can are connected in the vehicle width direction Rear bumper reinforcement is connected.

  Therefore, if the position of the rear side frame extending in the longitudinal direction of the vehicle is determined in accordance with the rear suspension damper, the positions of the crash can and the rear bumper reinforcement in the vertical direction of the vehicle are above the vehicle above the desired position where collision safety can be ensured. There is a risk of becoming a position.

Thus, when the upper end of the rear suspension damper is connected to the rear side frame extending in the longitudinal direction of the vehicle in order to secure the support rigidity of the rear suspension damper, the crash can and the rear bumper reinforcement are located at undesirable positions from the viewpoint of collision safety. Ment was disposed.
Therefore, when the upper end of the rear suspension damper is connected to a portion other than the rear side frame in order to ensure collision safety, the support stiffness of the rear suspension damper may be reduced compared to the case where the upper end of the rear suspension damper is connected to the rear side frame was there.

JP, 2016-222223, A

  An object of the present invention is to provide a rear vehicle body structure of a vehicle capable of connecting the upper end of the rear suspension damper to the rear side frame and improving the support rigidity of the rear suspension damper.

  The present invention is a rear vehicle body structure of a vehicle provided with a pair of left and right rear side frames which are disposed at the rear of a vehicle body of the vehicle and to which upper ends of left and right rear suspension dampers are connected. A damper support portion for supporting the upper end of the rear suspension damper at a desired position above the rear of the side sill and behind the vehicle, and extending rearward and upward of the vehicle from the rear of the side sill, the damper support is disposed at the upper end And a pair of left and right horizontal frame portions extending toward the rear of the vehicle and substantially horizontally while the front end is connected between the upper end and the lower end of the inclined frame portion; And a pair of left and right reinforcing frames for connecting the horizontal frame portion rearward of the vehicle with the damper support portion.

According to the present invention, the rear body structure of the vehicle can connect the upper end of the rear suspension damper to the rear side frame and can improve the support rigidity of the rear suspension damper.
Specifically, since the rear side frame is configured by the inclined frame portion and the horizontal frame portion, the rear vehicle body structure of the vehicle can connect the rear suspension damper to the rear side frame, while ensuring the collision safety. The crash can and rear bumper reinforcement disposed at a desired position can be connected to the rear side frame.

  Furthermore, the rear body structure of the vehicle can form a substantially triangular shape in a side view that is configured of the inclined frame portion, the horizontal frame portion, and the reinforcing frame. That is, in the rear vehicle body structure of the vehicle, the truss structure can be configured at the lower portion of the rear vehicle body by the inclined frame portion, the horizontal frame portion, and the reinforcing frame. For this reason, the rear body structure of the vehicle can improve the rigidity of the rear body by the cooperation of the inclined frame portion, the horizontal frame portion, and the reinforcing frame.

  In addition, when a load via the rear suspension damper acts on the damper support portion, the rear vehicle body structure of the vehicle is a load component acting on the damper support portion, the load component in the longitudinal direction of the vehicle, and the vertical direction of the vehicle, particularly the upper portion of the vehicle Load components can be distributively transmitted to the inclined frame portion and the reinforcing frame.

  At this time, the rear body structure of the vehicle transmits, for example, the load transmitted to the inclined frame portion further to the front of the vehicle through the side sill, and further transmits the load transmitted to the reinforcing frame through the horizontal frame portion. It can be transmitted to the rear of the vehicle.

Accordingly, when the load via the rear suspension damper acts on the damper support portion, the rear body structure of the vehicle can suppress the displacement of the damper support portion in the vehicle longitudinal direction and the vehicle vertical direction. For this reason, the rear body structure of the vehicle can improve the support rigidity of the damper support portion by the cooperation of the inclined frame portion, the horizontal frame portion, and the reinforcing frame.
Therefore, the rear body structure of the vehicle can connect the upper end of the rear suspension damper to the rear side frame without impairing the collision safety, and can improve the support rigidity of the rear suspension damper.

As an aspect of the present invention, a cross member may be provided which connects the left and right damper support portions in the vehicle width direction.
According to the present invention, the rear vehicle body structure of the vehicle can transmit and disperse the load component in the vehicle width direction of the load acting on the damper support portion to the other in the vehicle width direction via the cross member. For this reason, when the load via the rear suspension damper acts on the damper support portion, the rear body structure of the vehicle can suppress the displacement of the damper support portion in the vehicle width direction.

Thereby, the rear body structure of the vehicle can further improve the rigidity in the rear body and the support rigidity of the damper support portion by the cooperation of the inclined frame portion, the horizontal frame portion, the reinforcing frame, and the cross member. it can.
Therefore, in the rear vehicle body structure of the vehicle, the support rigidity of the rear suspension damper can be further improved by the cross members connecting the left and right damper support portions.

  As a mode of the present invention, a lower arm support portion for swingably supporting a lower arm is provided on the lower side of the vehicle than the horizontal frame portion of the rear side frame, and the reinforcement frame includes the damper via the horizontal frame portion. The support portion and the lower arm support portion may be connected.

  According to the present invention, the rear body structure of the vehicle can transmit the load acting on the lower arm support portion via the lower arm to the rear side frame via the reinforcing frame. At this time, the rear body structure of the vehicle can disperse and transmit the load acting on the lower arm support portion to the inclined frame portion and the horizontal frame portion.

Thus, when a load acts on the damper support and the lower arm support, the rear body structure of the vehicle can suppress the displacement of the damper support and the displacement of the lower arm support.
Therefore, in the rear body structure of the vehicle, the support rigidity of the rear suspension damper and the support rigidity of the lower arm can be improved by the reinforcing frame connecting the damper support portion and the lower arm support portion.

  Further, as an aspect of the present invention, the reinforcing frame is a first reinforcing frame, and the first reinforcing frame is configured to connect the damper support portion and the rear portion of the lower arm support portion via the horizontal frame portion. And the second reinforcement frame that connects the inclined frame portion and the vicinity of the connection point of the horizontal frame portion and the front portion of the lower arm support portion.

  According to the present invention, the rear vehicle body structure of the vehicle can form a substantially triangular shape in a side view configured of the inclined frame portion, the first reinforcing frame, the second reinforcing frame, and the lower arm support portion. That is, in addition to the truss structure including the inclined frame portion, the horizontal frame portion, and the first reinforcing frame, the rear body structure of the vehicle includes the inclined frame portion, the first reinforcing frame, the second reinforcing frame, and the lower arm support portion. The truss structure can be configured at the lower part of the rear body.

  For this reason, the rear body structure of the vehicle improves the rigidity of the rear body more reliably by the cooperation of the inclined frame portion, the horizontal frame portion, the first reinforcing frame, the second reinforcing frame, and the lower arm support portion. can do.

  Furthermore, in the rear vehicle body structure of the vehicle, of the load acting on the lower arm support portion, the load component in the vertical direction of the vehicle and the load component in the longitudinal direction of the vehicle can be divided into the rear side frame via the first reinforcement frame and the second reinforcement frame. Distributed transmission.

  As a result, when a load is applied to the damper support portion and the lower arm support portion, the rear body structure of the vehicle is able to move the displacement of the damper support portion in the vehicle vertical direction and the vehicle longitudinal direction and the displacement of the lower arm support portion. It can be suppressed.

For this reason, the rear body structure of the vehicle includes the support rigidity of the damper support portion and the lower arm by the cooperation of the inclined frame portion, the horizontal frame portion, the first reinforcement frame, the second reinforcement frame, and the lower arm support portion. The support rigidity of the support portion can be more reliably improved.
Therefore, in the rear body structure of the vehicle, the support rigidity of the rear suspension damper and the support rigidity of the lower arm can be further improved by the first reinforcement frame and the second reinforcement frame connected to the lower arm support.

Further, as an aspect of the present invention, the rear side frame may be provided with an upper arm support portion which is disposed at the front end of the horizontal frame portion and which pivotally supports the upper arm.
According to the present invention, not only the rear suspension damper but also the upper arm can be directly connected to the rear side frame in the rear body structure of the vehicle.

Furthermore, since the upper arm support portion is disposed at the connecting portion between the relatively rigid inclined frame portion and the horizontal frame portion, that is, at the top of the substantially triangular truss structure in a side view, the rear vehicle body structure of the vehicle is the upper arm support The support rigidity of the part can be improved.
In addition, when a load via the upper arm acts on the upper arm support, the vehicle rear body structure disperses and transmits the load acting on the upper arm support to the vehicle front and the vehicle rear via the rear side frame. it can.

Thus, when a load acts on the damper support and the upper arm support, the rear body structure of the vehicle can suppress the displacement of the damper support and the displacement of the upper arm support. For this reason, the rear body structure of the vehicle can improve the support rigidity of the upper arm support portion by the cooperation of the inclined frame portion, the horizontal frame portion, and the reinforcing frame.
Therefore, the rear vehicle body structure of the vehicle can improve the support rigidity of the rear suspension damper and the support rigidity of the upper arm by providing the upper arm support portion at the front end of the horizontal frame portion.

  According to the present invention, the upper end of the rear suspension damper can be connected to the rear side frame, and the support rigidity of the rear suspension damper can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view which shows the external appearance of the vehicle front upper view in a vehicle. The left view showing the left side in the rear body of a vehicle. The back view showing the back in the rear body of a vehicle. The bottom view which shows the bottom in the rear body of a vehicle. AA arrow sectional drawing in FIG. The top view which shows the plane in the rear body of a vehicle. BB arrow sectional drawing in FIG.

An embodiment of the invention will now be described in conjunction with the drawings.
The rear vehicle-body structure of the vehicle 1 of the present embodiment is a so-called space frame structure in which a plurality of extruded aluminum alloy frames are connected to form a vehicle body frame. A rear vehicle body structure of such a vehicle 1 will be described using FIGS. 1 to 7.

  1 shows an external perspective view of a front upper view of the vehicle 1 in the vehicle 1, FIG. 2 shows a left side view of the rear vehicle body of the vehicle 1, and FIG. 3 shows a rear view of the rear vehicle body of the vehicle 1. 5 shows a bottom view of the rear body of the vehicle 1, FIG. 5 shows a sectional view taken along the line AA in FIG. 1, FIG. 6 shows a plan view of the rear body of the vehicle 1, and FIG. BB arrow sectional drawing is shown.

  Further, in order to clarify the illustration, the rear suspension damper 2, the upper arm 3 and the lower arm 4 on the right side of the vehicle are not shown in FIG. 1, and the left and right floor panels 130 are omitted in FIG. There is. Further, in FIG. 6, the pillar upper frame 162, the pillar reinforcing frame 163, and the rear pillar 200 of the center pillar 160 are not shown, and the lower arm support member 260 is not shown in FIG.

  Further, in the drawings, arrows Fr and Rr indicate the front-rear direction, arrow Fr indicates the front, and arrow Rr indicates the rear. Furthermore, arrows Rh and Lh indicate the width direction, arrow Rh indicates the right direction, and arrow Lh indicates the left direction, with the vehicle interior side in the vehicle width direction being the inside of the vehicle width direction, and the vehicle outside in the vehicle width direction On the outside in the vehicle width direction.

  As shown in FIGS. 1 to 3, the vehicle body structure of the vehicle 1 in the present embodiment is a pair of left and right side sills 110 extending in the vehicle longitudinal direction and left and right side sills 110 at predetermined positions in the vehicle width direction. A floor tunnel 120 disposed substantially at the center in the vehicle width direction, left and right floor panels 130 disposed between the side sill 110 and the floor tunnel 120, and left and right extending in the vehicle longitudinal direction above the side sill 110 A pair of roof side rails 140, a front header 150 connecting the left and right roof side rails 140 in the vehicle width direction, a center pillar 160 connecting the side sill 110 and the roof side rail 140, and the left and right center pillars 160 in the vehicle width direction And a roof reinforcement 170 connected to the

  Furthermore, as shown in FIGS. 1 to 3, the vehicle body structure of the vehicle 1 includes a pair of left and right floor cross members 180 connecting the side sill 110 and the floor tunnel 120 in the vehicle width direction, and the rear of the vehicle from the rear end of the side sill 110. In the vehicle width direction, the rear pillar 200 extending in the vehicle longitudinal direction above the rear side frame 190, the rear header 210 connecting the left and right rear pillars 200 in the vehicle width direction, and the left and right center pillars 160 in the vehicle width direction And a second cross member 230 for connecting the left and right rear side frames 190 in the vehicle width direction.

  In addition, as shown in FIGS. 1 and 2, the vehicle body structure of the vehicle 1 is configured to be able to support the rear suspension damper 2 of the double wishbone type rear suspension, the upper arm 3 and the lower arm 4 at desired positions.

  Specifically, as shown in FIG. 1 and FIG. 2, the vehicle body structure of the vehicle 1 includes a pair of left and right damper support members 240 swingably supporting the upper end of the rear suspension damper 2 and the vehicle front of the rear suspension damper 2 A pair of upper arm support members 250 for swingably supporting the upper arm 3 disposed on the lower arm and a pair of lower arm support members 260 for swingably supporting the lower arm 4 to which the lower end of the rear suspension damper 2 is connected; , Are respectively disposed at desired positions.

  The vehicle body structure of the vehicle 1 is, as shown in FIGS. 1 to 4, a rear cross member 270 connecting the left and right lower arm support members 260, a front cross member 280 (see FIG. 4), and a damper support member 240. The first reinforcing frame 290 for supporting the lower arm support member 260 and the upper arm support member 250 at a desired position and improving the support rigidity of the damper support member 240, the lower arm support member 260, and the upper arm support member 250. The reinforcing frame 300, the third reinforcing frame 310, and the fourth reinforcing frame 320 are provided.

  The vehicle body structure of the vehicle 1 includes a pair of left and right side sills 110, a floor tunnel 120, left and right floor panels 130, a pair of left and right roof side rails 140, a center pillar 160, a front header 150, a roof reinforcement 170, and a floor cross. The member 180 constitutes a compartment in the vehicle 1.

  The left and right side sills 110 are extrusion members made of extruded aluminum alloy as shown in FIG. 1 and FIG. A substantially rectangular closed cross-section having a long length in the vertical direction of the vehicle is formed in a substantially cylindrical body extending in the longitudinal direction of the vehicle.

  Furthermore, as shown in FIG. 2, in side view, the side sill 110 is formed such that the lower surface in the vicinity of the rear end is inclined from the front of the vehicle to the rear of the vehicle. Although not shown in detail, the side sill 110 has a cross-sectional shape in a cross-section along the vehicle width direction formed into a cross-sectional shape having an internal space divided into a plurality of sections.

  Further, as shown in FIGS. 3 and 5, the floor tunnel 120 has a substantially gate-like shape in a rear view with the lower side of the vehicle open, and a pair of left and right tunnel frames 121 forming an upper surface portion in the floor tunnel 120 A pair of left and right side panel members 122 that form side surfaces in the vehicle width direction at 120 are formed.

  As shown in FIG. 5, the tunnel frame 121 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially cylindrical body obtained by extending a substantially rectangular closed cross section in the vehicle longitudinal direction. The left and right tunnel frames 121 are joined and integrated in parallel in the vehicle width direction.

  As shown in FIG. 5, the side panel member 122 is formed of a plate-like member made of aluminum alloy having a thickness in the vehicle width direction. More specifically, as shown in FIG. 5, in the longitudinal cross section along the vehicle width direction, the side panel member 122 is provided with the upper joint surface 122a and the upper joint surface 122a that contact the tunnel frame 121 in the vehicle width direction. A lower junction in which a sloped surface portion 122b extending outward in the vehicle width direction and downward to the vehicle, a side surface portion 122c substantially extending downward from the lower end of the inclined surface portion 122b, and a lower end of the side portion 122c further extending downward in the vehicle It is integrally formed with the surface portion 122d.

  As shown in FIGS. 1 and 5, in the side panel member 122 of the floor tunnel 120, the upper joint surface portion 122a is joined to the side surface in the vehicle width direction of the tunnel frame 121, and the lower joint surface portion 122d is in the floor tunnel 120. It is joined to a pair of left and right tunnel side frames 123 disposed on both sides in the vehicle width direction.

  As shown in FIGS. 1 and 5, the tunnel side frame 123 is an extruded member made of an extruded aluminum alloy, and has a substantially rectangular shape whose length in the vehicle width direction is longer than the length in the vehicle vertical direction. Is formed into a substantially cylindrical body extending in the longitudinal direction of the vehicle.

  Furthermore, a junction flange portion 123a in which a side surface on the inner side in the vehicle width direction extends upward is integrated with the tunnel side frame 123 as a junction portion to which the lower junction surface portion 122d of the side panel member 122 of the floor tunnel 120 is joined. It is formed. The rear end of the tunnel side frame 123 is joined to the front of a floor cross member 180 described later.

Further, as shown in FIG. 1, the left and right floor panels 130 are disposed between the side sill 110 and the tunnel side frame 123 and formed in a concave shape that forms the floor surface of the cabin in the vehicle 1. As shown in FIGS. 1 and 5, in the floor panel 130, the outer edge in the vehicle width direction is joined to the side surface in the vehicle width direction on the side sill 110, and the inner edge in the vehicle width direction is the tunnel side frame 123. It is joined to the upper surface.
Further, the floor panel 130 is joined at its vehicle rear edge to a floor cross member 180 described later, and is connected at its vehicle front edge to a vehicle front side cross member (not shown).

  Further, as shown in FIGS. 1 and 3, the roof side rail 140 is an extruded member made of an extruded aluminum alloy, and is disposed above the side sill 110 and slightly inward of the vehicle in the vehicle width direction. ing. The roof side rail 140 is formed in a substantially cylindrical body extending in a forward and backward direction of the vehicle so as to be curved after extending a substantially rectangular closed cross section in front of the vehicle. A portion of the roof side rail 140 that extends downward in the forward direction of the vehicle is formed as a front pillar in the vehicle 1.

  Further, as shown in FIG. 1, the front header 150 connects the vicinity of the front end of a portion of the roof side rail 140 extended in the vehicle longitudinal direction in the vehicle width direction. The front header 150 is formed in a substantially rectangular closed cross section extending in the vehicle width direction.

  Further, as shown in FIG. 2, in a side view, the center pillar 160 is a pillar lower frame 161 extending upward from the top surface of the side sill 110 and a pillar upper frame 162 extending upward from the pillar lower frame 161 in front of the vehicle. The pillar upper frame 162 and the pillar reinforcing frame 163 connecting the pillar lower frame 161 are integrally joined.

  The pillar lower frame 161 is an extruded member made of an extruded aluminum alloy as shown in FIG. 1 to FIG. 3, and extends in a predetermined direction a substantially trapezoidal closed cross section having a partition separating inner spaces. It is formed in the provided substantially cylindrical body.

  The pillar lower frame 161 is formed to have a length in a predetermined direction in which the upper end is positioned above the vehicle with respect to the joining portion with the pillar upper frame 162 in a state where the pillar upper frame 162 is joined. A portion of the upper portion of the vehicle above the junction with the pillar upper frame 162 is taken as an extended portion 161a of the pillar lower frame 161 (see FIG. 2).

  Such a pillar lower frame 161, as shown in FIGS. 2 and 3, has one end in a predetermined direction as the lower end, and the short side in the substantially trapezoidal closed cross section is positioned outside in the vehicle width direction. The upper end is disposed on the vehicle body of the vehicle 1 so as to be positioned rearward of the vehicle and inward in the vehicle width direction. The lower end of the pillar lower frame 161 is joined to the upper surface of the side sill 110.

  As shown in FIGS. 1 to 3, the pillar upper frame 162 is an extruded member made of an extruded aluminum alloy, and is a substantially cylindrical member extended in a predetermined direction while gently curving a substantially triangular closed cross section. It is formed in a solid. The substantially triangular closed cross section in the pillar upper frame 162 is formed to have a cross-sectional area smaller than the cross-sectional area of the substantially trapezoidal closed cross section in the pillar lower frame 161.

  As shown in FIGS. 2 and 3, the upper end of the pillar upper frame 162 is lower than the lower end in a state where the top in the substantially triangular closed cross section is located outside in the vehicle width direction with one end in a predetermined direction as the lower end. It is disposed on the vehicle body of the vehicle 1 so as to be positioned forward of the vehicle and on the inner side in the vehicle width direction.

  The lower end of the pillar upper frame 162 is joined to the front of the lower pillar frame 161 at a position lower than the vicinity of the approximate center of the center pillar 160 in the vertical direction of the vehicle, as shown in FIG. The rear end of the side rail 140 is joined.

  As shown in FIG. 2, the pillar reinforcing frame 163 has the front surface of the pillar lower frame 161 and the rear surface of the pillar upper frame 162 in the vehicle longitudinal direction above the vehicle at the junction of the pillar lower frame 161 and the pillar upper frame 162. Connected to

  More specifically, the pillar reinforcing frame 163 is an extrusion-formed extrusion member made of an aluminum alloy, and is formed in a cylindrical body in which a substantially rectangular closed cross section is extended in the vehicle longitudinal direction. The substantially rectangular closed cross section in the pillar reinforcing frame 163 is formed to have a cross-sectional area smaller than the cross-sectional area of the substantially triangular closed cross section in the pillar upper frame 162.

  The pillar reinforcing frame 163 is joined to the extending portion 161 a of the pillar lower frame 161 and the pillar upper frame 162 at a substantially central position in the vehicle vertical direction of the extending portion 161 a of the pillar lower frame 161.

  Further, as shown in FIGS. 1 and 2, the roof reinforcement 170 connects the upper ends of the left and right center pillars 160 in the vehicle width direction via the roof connecting member 171. The roof reinforcement 170 has a cross-sectional shape in a longitudinal cross section along the longitudinal direction of the vehicle, which is formed in a substantially inverted trapezoidal shape whose short side is the lower side of the vehicle (see FIG. 7).

  The roof connecting member 171 is substantially T-shaped in a side view as shown in FIG. 7 and is joined to the roof reinforcement 170, and the upper end of the center pillar 160, the rear end of the roof side rail 140, And the front end of the rear pillar 200.

  Also, as shown in FIGS. 1, 4 and 7, the floor cross member 180 is an extruded member made of an extruded aluminum alloy, and the lower end of the rear end of the side sill 110 and the rear end of the floor tunnel 120. The lower part is connected in the vehicle width direction.

  As shown in FIG. 6 and FIG. 7, the floor cross member 180 is closed in a substantially polygonal shape in a side view substantially in the form of a polygon having a substantially rectangular closed cross section in a side view. It is formed in a cross-sectional shape.

The floor cross member 180 is connected to the side sill 110 and the floor tunnel 120 at both ends in the vehicle width direction.
Further, in the side cross section, the floor cross member 180 is joined to the rear end of the tunnel side frame 123 and is joined to a portion where the front lower portion extends in a substantially flat plate shape to the vehicle front.

  Further, as shown in FIG. 2, the pair of left and right rear side frames 190 includes an inclined frame portion 191 whose lower end is joined to the rear end of the side sill 110, and a horizontal frame portion 192 whose front end is joined to the inclined frame portion 191. It comprises a damper support member 240 and an upper arm support member 250 which will be described in detail later.

The inclined frame portion 191 is, as shown in FIGS. 1 and 2, a damper support member 240 disposed at a desired position above the rear end of the side sill 110 and on the inner side in the vehicle width direction; And are connected. The damper support member 240 will be described in detail later.
More specifically, the inclined frame portion 191 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction.

As shown in FIGS. 2 and 3, the inclined frame portion 191 is disposed on the vehicle body with one end in a predetermined direction as the lower end and the upper end positioned at the upper rear and the inner side in the vehicle width direction with respect to the lower end. ing.
The lower end of the inclined frame portion 191 is joined to the rear side of the side sill 110 in the vehicle width direction, and the upper end is joined to the damper support member 240 disposed at a predetermined position.

  On the other hand, as shown in FIGS. 1 and 2, the horizontal frame portion 192 is provided with left and right rear crash cans 193 disposed at a position rearward of the lower arm support member 260 described later and at a desired vehicle vertical direction. It connects with the upper arm support member 250 disposed at a desired position on the vehicle front lower side than the damper support member 240. At the rear end of the rear crash can 193, as shown in FIG. 2, a rear bumper reinforcement 194 is connected, which connects the left and right rear crash cans 193 in the vehicle width direction.

  More specifically, the horizontal frame portion 192 is an extrusion-formed extruded member made of an aluminum alloy, and is formed in a cylindrical body obtained by extending a substantially rectangular closed cross section in the vehicle longitudinal direction. The substantially rectangular closed cross section of the horizontal frame portion 192 is formed to have a smaller cross sectional area than the substantially rectangular closed cross section of the inclined frame portion 191.

  As shown in FIGS. 2 and 3, the horizontal frame portion 192 has its rear end inward in the vehicle width direction with respect to the front end at a position substantially the same as the rear crash can 193 disposed at the desired position. It is disposed on the vehicle body in a positioned state.

  The front end of the horizontal frame portion 192 is joined to the upper arm support member 250 disposed near the approximate center of the inclined frame portion 191 in the vertical direction of the vehicle, as shown in FIGS. It is linked to the can 193.

Further, as shown in FIG. 2, the rear pillar 200 connects the upper end of the pillar upper frame 162 in the center pillar 160 and the upper end of the inclined frame portion 191 in the rear side frame 190.
The rear pillar 200 is an extruded member made of an extruded aluminum alloy, and formed in a substantially cylindrical body extended in a predetermined direction while curving a substantially rectangular closed cross section.

  Then, as shown in FIG. 2, the rear pillar 200 has one end in a predetermined direction as a front end, the front end is joined to the upper end of the pillar upper frame 162, and the rear end is joined to the upper surface of a third reinforcing frame 310 described later. .

  In other words, the rear pillar 200 has its front end connected to the rear end of the roof side rail 140 via the pillar upper frame 162, and the rear end to the upper end of the inclined frame 191 via the third reinforcing frame 310 and the damper support member 240. Are linked.

  More specifically, as shown in FIG. 2, in a side view, the rear pillar 200 extends from the front end joined to the upper end of the pillar upper frame 162 substantially linearly toward the rear and the lower side of the vehicle. A straight portion 200a, a curved portion 200b curved and extended backward from the rear end of the front straight portion 200a, and a rear straight portion extending substantially straight from the rear end of the curved portion 200b toward the damper support member 240 It is integrally formed with 200c.

  Furthermore, as shown in FIG. 3, the rear pillar 200 is formed in a shape in which the front straight portion 200a extends substantially straight from the front end toward the rear of the vehicle in a rear view, and the curved portion 200b is below the vehicle rear, And it is formed in the shape where it curved toward the cross direction inner side, and back straight part 200c is formed in the shape extended in a substantially straight line towards the inner side in the cross direction from the front end.

  As shown in FIG. 2, the rear pillar 200 is formed such that the curved portion is located in the vicinity of a portion intersecting the virtual extension line of the pillar lower frame 161 extended in the upper direction of the vehicle in a side view.

Further, as shown in FIGS. 1 and 2, the rear header 210 connects the curved portions 200 b of the left and right rear pillars 200 in the vehicle width direction in a side view.
As shown in FIGS. 2 and 3, the rear header 210 includes a header body 211 extending in the vehicle width direction, a header panel 212 forming an opening upper edge of a luggage compartment opening in the vehicle 1, a header body 211, and a header panel 212. And a pair of left and right header connecting members 213 which connect the rear pillar 200 integrally.
As shown in FIG. 7, the header body 211 is an extruded member made of an extruded aluminum alloy, and is substantially a cylinder in which a substantially triangular closed cross section whose top is located below the vehicle is extended in the vehicle width direction. It is formed in a solid.

  Further, as shown in FIG. 1 and FIG. 3, the lower pillar lower frame 161 at the left and right of the center pillar 160 with the substantially vertical center of the vehicle in the vertical direction positioned substantially at the same position as the upper surface of the floor tunnel 120. Are connected in the vehicle width direction.

  More specifically, as shown in FIGS. 6 and 7, the first cross member 220 is an extruded member made of an extruded aluminum alloy, and has a substantially hexagonal cross section having a partition that separates the internal space above and below the vehicle. The closed cross section is formed in a substantially cylindrical body extending in the vehicle width direction.

  The first cross member 220 is joined to the pillar lower frame 161 at both ends in the vehicle width direction, and the approximate center in the vehicle width direction is on the upper surface of the tunnel frame 121 in the floor tunnel 120 via the tunnel connecting member 124 described later. It is connected. The first cross member 220 is joined to the tunnel connection member 124.

Further, as shown in FIGS. 3, 6 and 7, the second cross member 230 connects the left and right damper support members 240 and the rear end of the third reinforcing frame 310 described later in the vehicle width direction. .
More specifically, as shown in FIGS. 6 and 7, the second cross member 230 is an extruded member made of an extruded aluminum alloy, and has a substantially rectangular closed cross section having a partition that separates the internal space from above and below the vehicle. Is formed in a substantially cylindrical body extending in the vehicle width direction.

  The second cross member 230 is joined so that both ends in the vehicle width direction straddle the damper support member 240 and the rear end of the third reinforcing frame 310. In other words, the second cross member 230 connects the upper end of the inclined frame portion 191 in the rear side frame 190 in the vehicle width direction via the damper support member 240.

  Further, as shown in FIGS. 1 to 3, the pair of left and right damper support members 240 includes the inclined frame portion 191, the second cross member 230, the first reinforcing frame 290 described later, and the third reinforcing frame 310. While being configured as a connecting member to be connected, the upper end of the rear suspension damper 2 can be swingably supported at a desired position with the vehicle longitudinal direction as a rotation center. The pair of left and right damper support members 240 is made of aluminum die cast.

More specifically, as shown in FIG. 2, the damper support member 240 is disposed at a desired position above the vehicle with respect to the approximate center of the horizontal frame portion 192 in the front-rear direction in side view.
The damper support member 240 is, as shown in FIG. 2, in a vehicle width direction in which the second cross member 230 is formed so as to be able to be joined with a front surface portion formed on the rear side frame 190 so that the upper end of the inclined frame portion 191 can be joined. An inner side surface portion, a rear surface portion to which the first reinforcement frame 290 is formed to be connectable, an upper surface portion to which the third reinforcement frame 310 is formed to be connectable, and an upper end of the rear suspension damper 2 can be swingably supported. It is formed in the side view substantially rectangular shape with the side part of the vehicle width direction outer side formed in this.

  In addition, as shown in FIGS. 1 to 3, the pair of upper arm support members 250 on the left and right sides is configured as a connecting member that connects the inclined frame portion 191, the horizontal frame portion 192, and a second reinforcing frame 300 described later. At the same time, one end of the upper arm 3 on the inner side in the vehicle width direction can be swingably supported at a desired position with the vehicle front-rear direction as the center of rotation. The left and right upper arm support members 250 are made of aluminum die cast.

  More specifically, as shown in FIG. 2, the upper arm support member 250 is a desired position on the vehicle front lower side and slightly inside the vehicle width direction with respect to the damper support member 240 in substantially the same vehicle vertical direction as the rear crash can 193. Is located in

  As shown in FIG. 2, the upper arm support member 250 is a rear surface portion in which the upper surface portion of the rear side frame 190 on which the lower surface of the inclined frame portion 191 can be joined and the front end of the horizontal frame portion 192 can be joined. And a lower surface portion of the second reinforcement frame 300 formed so as to be connectable at the upper end, and a side surface portion formed on the outer side in the vehicle width direction formed to be able to support the upper arm 3 swingably. It is done.

  Further, as shown in FIGS. 1 to 3, the pair of left and right lower arm support members 260 is configured as a connecting member that connects a first reinforcing frame 290 described later and the second reinforcing frame 300, and The lower end of the lower arm 4 having a substantially A-shape in plan view can be swingably supported at a desired position with the lower arm 4 as a rotation center. The lower arm support member 260 is made of aluminum die cast.

  The lower arm support member 260 is, as shown in FIG. 3, desired in the vicinity of an extension line extending an imaginary straight line (not shown) connecting the rear end of the roof side rail 140 and the damper support member 240 downward in the rear view. It is arranged at the position.

  More specifically, as shown in FIGS. 2 and 3, the lower arm support member 260 has its rear end located rearward of the damper support member 240 behind the horizontal frame 192 and inward in the vehicle width direction. It is disposed at a desired position.

  The lower arm support member 260 is, as shown in FIGS. 1 and 2, an upper surface portion formed such that the lower end of the first reinforcement frame 290 and the lower end of the second reinforcement frame 300 can be joined together, The lower arm 4 is formed in a substantially rectangular shape in a side view having a vehicle front side connection portion and a vehicle width direction outside side portion configured to be able to support the vehicle rear side connection portion in a pivotable manner.

  Further, as shown in FIGS. 4 and 7, the rear cross member 270 is an extruded member made of an extruded aluminum alloy, and extends in the vehicle width direction, and the lower rear portion of the left and right lower arm support members 260 It is connected in the vehicle width direction.

  More specifically, as shown in FIG. 7, the rear cross member 270 is, in a longitudinal cross section along the longitudinal direction of the vehicle, a member rear 271 of a closed cross section having a substantially polygonal cross section and a substantially flat plate having a thickness in the vertical direction It is formed in the shape which connected the member flat part 272 of a cross shape, and the member front 273 of the closed cross section of the cross section substantially polygonal shape whose length in the vehicle up-down direction is shorter than the member rear 271 from the vehicle rear in this order. .

  In the rear cross member 270, the member rear portion 271 and the member front portion 273 are joined to the inner side surface in the vehicle width direction of the lower arm support member 260, and the member flat plate portion 272 is joined to the lower surface of the lower arm support member 260. .

Further, as shown in FIGS. 4 and 7, the front cross member 280 is an extruded member made of extruded aluminum alloy, and connects the lower front portions of the left and right lower arm support members 260 in the vehicle width direction. .
More specifically, as shown in FIG. 7, the front cross member 280 has a substantially longitudinal length in the longitudinal direction of the vehicle with respect to the longitudinal direction of the vehicle, and has two partition walls separating the internal space in the longitudinal direction of the vehicle. A rectangular closed cross section is formed in a substantially cylindrical body extending in the vehicle width direction.

  As shown in FIG. 4, the front cross member 280 is joined to a pair of left and right rear member connecting members 281 fastened and fixed to the lower surface of the front portion of the lower arm support member 260. In other words, the front cross member 280 connects the lower arm support member 260 via the rear member connection member 281.

  The front cross member 280 is connected to the rear cross member 270 via a pair of left and right first inclined members 330 extending substantially in the front-rear direction of the vehicle, as shown in FIG. A pair of side sill cross members 340 extending in the vehicle width direction in front of the vehicle is connected via a pair of left and right second inclined members 350 and a pair of left and right third inclined members 360.

  Specifically, the first inclined member 330 is an extrusion-formed extrusion member made of an aluminum alloy, and is formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction. The first inclined member 330 is disposed on the vehicle body in a state where the rear end is positioned inward in the vehicle width direction with respect to the front end with one end in a predetermined direction as the front end in bottom view as shown in FIG. .

  The front end of the first inclined member 330 is joined to the rear member connecting member 281, and the rear end is joined to the vicinity of the approximate center in the vehicle width direction of the rear cross member 270. That is, the first inclined member 330 is connected to the front cross member 280 via the rear member connection member 281.

As shown in FIG. 4 and FIG. 7, the side sill cross member 340 connects the rear end lower surface of the left and right side sills 110 in the vehicle width direction.
More specifically, as shown in FIGS. 4 and 7, the side-sill cross member 340 is an extruded member made of an extruded aluminum alloy, and has a vehicle width longer than the length in the vehicle width direction of the front cross member 280. A substantially rectangular closed cross section is formed in a substantially cylindrical body extending in the vehicle width direction with a length in the direction.

  And both ends in the vehicle width direction are joined to the pair of left and right front member connecting members 341 fastened and fixed to the lower surface of the rear end of the side sill 110 in the side sill cross member 340. That is, the side sill cross member 340 connects the rear end lower surface of the side sill 110 in the vehicle width direction via the front member connecting member 341.

  Further, as shown in FIG. 4, the pair of left and right second inclined members 350 connect both ends in the vehicle width direction of the front cross member 280 with both ends in the vehicle width direction of the side sill cross member 340 in bottom view. ing.

  More specifically, the second inclined member 350 is an extruded member made of an extruded aluminum alloy, and is formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction. As shown in FIG. 4, the second inclined member 350 is disposed on the vehicle body in a state where the rear end is positioned inward in the vehicle width direction with respect to the front end with one end in a predetermined direction as the front end in bottom view .

  The second inclined member 350 is joined at its front end to the front member connecting member 341 and at its rear end to the rear member connecting member 281. That is, the second inclined member 350 is connected to the side sill cross member 340 via the front member connecting member 341 and is connected to the front cross member 280 via the rear member connecting member 281.

  Further, as shown in FIG. 4, the pair of left and right third inclined members 360 in the vicinity of the approximate center of the front cross member 280 in the vehicle width direction and the two ends of the side sill cross member 340 in the vehicle width direction It is connected.

  More specifically, the third inclined member 360 is an extruded member made of an extruded aluminum alloy, and formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction. As shown in FIG. 4, the third inclined member 360 is disposed on the vehicle body in a state where the rear end is located outside in the vehicle width direction with respect to the front end with one end in a predetermined direction as the front end in bottom view .

  A front end of the third inclined member 360 is joined near the approximate center of the front member connecting member 341 in the vehicle width direction, and a rear end is joined to the rear member connecting member 281. That is, the third inclined member 360 is connected to the front cross member 280 via the rear member connection member 281.

Further, as shown in FIGS. 2 and 3, the pair of left and right first reinforcement frames 290 connects the damper support member 240 and the lower arm support member 260 substantially linearly.
More specifically, as shown in FIG. 2, FIG. 3 and FIG. 6, the first reinforcing frame 290 is an extruded member made of extruded aluminum alloy, and extends a substantially rectangular closed cross section in a predetermined direction It is formed into a cylindrical body.

  As shown in FIGS. 2 and 3, the first reinforcement frame 290 has one end in a predetermined direction as an upper end, and the lower end with respect to the upper end is positioned below the rear of the vehicle and inward in the vehicle width direction. It is disposed on the vehicle body in a state of being inclined so as to pass through the inner side in the vehicle width direction.

  The first reinforcing frame 290 is inclined inward in the vehicle width direction so as to be continuous with the rear pillar 200 extending from the outside in the vehicle width direction toward the inside in the vehicle width direction in rear view as shown in FIG. Are arranged in

  The first reinforcement frame 290 is joined to the damper support member 240 at a position slightly lower than the upper end of the vehicle, and the lower end is joined to the rear upper surface of the lower arm support member 260, and the lateral side in the vehicle width direction is horizontal It is joined to the inner side surface of the frame portion 192 in the vehicle width direction.

  That is, the first reinforcement frame 290 is connected at its upper end near the upper end to the upper end of the inclined frame portion 191 via the damper support member 240 and is connected at the lower end to the lower arm support member 260 and is horizontal between the upper end and the lower end. It is connected to the frame portion 192.

Further, as shown in FIGS. 2 and 6, the pair of left and right second reinforcing frames 300 substantially linearly connect the upper arm support member 250 and the front portion of the lower arm support member 260.
More specifically, the second reinforcing frame 300 is an extruded member made of an extruded aluminum alloy, and is formed in a cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction.

In the second reinforcement frame 300, as shown in FIGS. 2 and 6, with one end in a predetermined direction as the upper end, the lower end is inclined downward toward the front of the vehicle and inward in the vehicle width direction with respect to the upper end. It is disposed on the vehicle body.
The upper end of the second reinforcing frame 300 is joined to the inside in the vehicle width direction of the upper arm support member 250, and the lower end is joined to the front upper surface of the lower arm support member 260.

  That is, the upper end of the second reinforcing frame 300 is connected to the connecting portion between the inclined frame portion 191 and the horizontal frame portion 192 via the upper arm supporting member 250, and the lower end is connected to the lower arm supporting member 260.

  Further, as shown in FIG. 2, the pair of left and right third reinforcing frames 310 substantially linearly connect the upper end of the pillar lower frame 161 in the center pillar 160 and the upper end of the first reinforcing frame 290.

  More specifically, the third reinforcing frame 310 is an extruded member made of an extruded aluminum alloy, and formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction. As shown in FIGS. 2 and 3, the third reinforcing frame 310 is inclined such that the rear end is positioned below the rear of the vehicle and inward in the vehicle width direction with respect to the front end with one end in a predetermined direction as the front end. Is mounted on the car body.

  The third reinforcement frame 310 has its front end joined to the pillar connecting member 164 joined to the side in the vehicle width direction at the extension portion 161a of the pillar lower frame 161, and the rear end is the top surface of the damper support member 240, and 1 is joined to the front surface of the reinforcing frame 290. Further, the rear end of the rear pillar 200 is joined to the upper surface of the rear of the third reinforcing frame 310.

  That is, the front end of the third reinforcing frame 310 is connected to the upper end of the pillar lower frame 161 via the pillar connection member 164, and the rear end is connected to the upper end of the inclined frame portion 191 via the damper support member 240. .

Further, as shown in FIGS. 2, 6, and 7, the pair of left and right fourth reinforcing frames 320 substantially linearly connect the upper surface of the floor tunnel 120 and the front surface of the second cross member 230.
More specifically, the fourth reinforcing frame 320 is an extruded member made of an extruded aluminum alloy, and formed in a substantially cylindrical body in which a substantially rectangular closed cross section is extended in a predetermined direction.

As shown in FIGS. 6 and 7, the fourth reinforcing frame 320 is disposed on the vehicle body in a state where the rear end is positioned on the rear upper side and the outer side in the vehicle width direction with respect to the front end with one end in a predetermined direction as the front end. It is set up.
The fourth reinforcement frame 320 has its front end joined to the tunnel connection member 124 joined to the upper surface of the floor tunnel 120, and its rear end is slightly on the front side inward of the vehicle in both vehicle width directions of the second cross member 230. It is joined.

  Further, as shown in FIGS. 6 and 7, the tunnel connecting member 124 is formed in a substantially box-like shape having a substantially trapezoidal shape in a plan view and a short side in front of the vehicle in a plan view. The tunnel connection member 124 is configured to be able to integrally connect the front ends of the left and right fourth reinforcement frames 320.

  As shown in FIG. 7, the front end of the tunnel connecting member 124 is joined to the upper surface of the tunnel frame 121 in the floor tunnel 120, and the rear end is joined to the rear surface of the first cross member 220.

  As described above, in the rear body structure of the vehicle 1 provided with the left and right rear side frames 190 to which the upper ends of the left and right rear suspension dampers 2 are disposed while being disposed at the rear of the vehicle body of the vehicle 1. A damper support member 240 for supporting the upper end of the rear suspension damper 2 at a desired position above the rear of the pair of left and right side sills 110, extends from the rear of the side sill 110 to the rear of the vehicle and upwards, and A front end is connected between an upper end and a lower end of the inclined frame 191, and a pair of left and right horizontal frames 192 extending toward the rear of the vehicle and substantially horizontally. And the horizontal frame portion 192 and the damper support member 240 at the rear of the vehicle than the damper support member 240. More with a pair of left and right first reinforcing frame 290 forms an, it is possible to connect the upper end of the rear suspension damper 2 to the rear side frame 190, it is possible to improve the supporting rigidity of the rear suspension damper 2.

  Specifically, since the rear side frame 190 is configured by the inclined frame portion 191 and the horizontal frame portion 192, the rear vehicle body structure of the vehicle 1 can connect the rear suspension damper 2 to the rear side frame 190, while having collision safety. The rear crash can 193 and the rear bumper reinforcement 194 disposed at desired positions in the vertical direction of the vehicle, which can be secured, and the rear side frame 190 can be connected.

  Furthermore, the rear vehicle-body structure of the vehicle 1 can form a substantially triangular shape in a side view configured of the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290. That is, in the rear body structure of the vehicle 1, a truss structure can be formed at the lower portion of the rear body by the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290. For this reason, the rear body structure of the vehicle 1 can improve the rigidity of the rear body by cooperation of the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290.

  In addition, when a load via the rear suspension damper 2 acts on the damper support member 240, the rear vehicle body structure of the vehicle 1 is a load component acting on the damper support member 240, the load component in the vehicle longitudinal direction, and the vehicle vertical direction In particular, a load component in the upper direction of the vehicle can be distributively transmitted to the inclined frame portion 191 and the first reinforcing frame 290.

  At this time, the rear body structure of the vehicle 1 transmits the load transmitted to the inclined frame portion 191 further to the front of the vehicle through the side sill 110, and the load transmitted to the first reinforcing frame 290 is a horizontal frame portion It can be further transmitted to the rear of the vehicle via 192.

  Thus, when the load via the rear suspension damper 2 acts on the damper support member 240, the rear vehicle body structure of the vehicle 1 can suppress the displacement of the damper support member 240 in the vehicle longitudinal direction and the vehicle vertical direction.

For this reason, the rear body structure of the vehicle 1 can improve the support rigidity of the damper support member 240 by the cooperation of the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290.
Therefore, the rear body structure of the vehicle 1 can connect the upper end of the rear suspension damper 2 to the rear side frame 190 without deteriorating the collision safety, and can improve the support rigidity of the rear suspension damper 2.

  Further, by providing the second cross member 230 that connects the left and right damper support members 240 in the vehicle width direction, the rear vehicle body structure of the vehicle 1 can be configured such that a load in the vehicle width direction among The component can be transmitted and dispersed through the second cross member 230 to the other in the vehicle width direction. Therefore, when the load via the rear suspension damper 2 acts on the damper support member 240, the rear body structure of the vehicle 1 can suppress the displacement of the damper support member 240 in the vehicle width direction.

Thereby, the rear body structure of the vehicle 1 is configured by combining the inclined frame portion 191, the horizontal frame portion 192, the first reinforcing frame 290, and the second cross member 230 with each other to provide rigidity and a damper support The support rigidity of 240 can be further improved.
Accordingly, in the rear vehicle body structure of the vehicle 1, the support rigidity of the rear suspension damper 2 can be further improved by the second cross member 230 connecting the left and right damper support members 240.

  Further, a lower arm support member 260 for swingably supporting the lower arm 4 is provided below the horizontal frame portion 192 of the rear side frame 190 in the vehicle, and the first reinforcement frame 290 has a damper support member via the horizontal frame portion 192. By connecting the lower arm support member 260 to the lower arm support member 260, the rear vehicle body structure of the vehicle 1 receives the load acting on the lower arm support member 260 via the lower arm 4 and the rear side frame 190 via the first reinforcing frame 290. Can be transmitted to At this time, the rear body structure of the vehicle 1 can disperse and transmit the load acting on the lower arm support member 260 to the inclined frame portion 191 and the horizontal frame portion 192.

Thus, when a load acts on damper support member 240 and lower arm support member 260, the rear vehicle body structure of vehicle 1 can suppress the displacement of damper support member 240 and the displacement of lower arm support member 260.
Therefore, the rear vehicle body structure of the vehicle 1 improves the support rigidity of the rear suspension damper 2 and the support rigidity of the lower arm 4 by the first reinforcement frame 290 connecting the damper support member 240 and the lower arm support member 260. be able to.

  In addition, the first reinforcing frame 290 is configured to connect the damper support member 240 and the rear portion of the lower arm support member 260 via the horizontal frame portion 192, and the vicinity of the connection portion of the inclined frame portion 191 and the horizontal frame portion 192 The rear vehicle body structure of the vehicle 1 includes the inclined frame portion 191, the first reinforcing frame 290, and the second reinforcing frame 300 by providing the second reinforcing frame 300 connecting the front and rear of the lower arm support member 260 with each other. The lower arm support member 260 can form a substantially triangular shape in a side view.

  That is, in addition to the truss structure including the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290, the rear body structure of the vehicle 1 includes the inclined frame portion 191, the first reinforcing frame 290, and the second reinforcing member. The frame 300 and the lower arm support member 260 can form a truss structure at the lower part of the rear vehicle body.

  For this reason, the rear vehicle body structure of the vehicle 1 is formed in the rear vehicle body by the cooperation of the inclined frame portion 191, the horizontal frame portion 192, the first reinforcing frame 290, the second reinforcing frame 300, and the lower arm support member 260. The rigidity can be more reliably improved.

  Further, the rear vehicle body structure of the vehicle 1 includes the load component in the vertical direction of the vehicle and the load component in the longitudinal direction of the vehicle of the load acting on the lower arm support member 260 via the first reinforcement frame 290 and the second reinforcement frame 300. Can be distributed to the rear side frame 190.

  Thus, when a load acts on the damper support member 240 and the lower arm support member 260, the rear vehicle body structure of the vehicle 1 displaces the damper support member 240 in the vehicle vertical direction and the vehicle longitudinal direction, and the lower arm support member The displacement of 260 can be further suppressed.

  For this reason, the rear body structure of the vehicle 1 is a damper support member by the cooperation of the inclined frame portion 191, the horizontal frame portion 192, the first reinforcement frame 290, the second reinforcement frame 300, and the lower arm support member 260. The support rigidity of 240 and the support rigidity of the lower arm support member 260 can be more reliably improved.

  Therefore, the rear body structure of the vehicle 1 further improves the support rigidity of the rear suspension damper 2 and the support rigidity of the lower arm 4 by the first reinforcing frame 290 and the second reinforcing frame 300 connected to the lower arm support member 260. Can.

  Further, the rear side frame 190 is disposed at the front end of the horizontal frame portion 192, and is provided with the upper arm support member 250 for pivotally supporting the upper arm 3. Not only that, the upper arm 3 can also be directly connected to the rear side frame 190.

  Furthermore, since the upper arm support member 250 is disposed at the connecting portion between the relatively rigid inclined frame portion 191 and the horizontal frame portion 192, that is, at the top of the truss structure having a substantially triangular shape in side view, the rear body structure of the vehicle 1 Thus, the support rigidity of the upper arm support member 250 can be improved.

  In addition, when the load via the upper arm 3 acts on the upper arm support member 250, the rear body structure of the vehicle 1 moves the load acting on the upper arm support member 250 forward and backward of the vehicle via the rear side frame 190. It can be distributed and transmitted.

  Thus, when a load is applied to the damper support member 240 and the upper arm support member 250, the rear body structure of the vehicle 1 can suppress the displacement of the damper support member 240 and the displacement of the upper arm support member 250. For this reason, the rear body structure of the vehicle 1 can improve the support rigidity of the upper arm support member 250 by the cooperation of the inclined frame portion 191, the horizontal frame portion 192, and the first reinforcing frame 290.

  Therefore, by providing the upper arm support member 250 at the front end of the horizontal frame 192, the rear vehicle body structure of the vehicle 1 can improve the support rigidity of the rear suspension damper 2 and the support rigidity of the upper arm 3.

In correspondence with the configuration of the present invention and the above-described embodiment,
The damper support portion of the present invention corresponds to the damper support member 240 of the embodiment,
And so on
The reinforcing frame and the first reinforcing frame correspond to the first reinforcing frame 290,
The cross member corresponds to the second cross member 230,
The lower arm support portion corresponds to the lower arm support member 260,
The second reinforcing frame corresponds to the second reinforcing frame 300,
The upper arm support corresponds to the upper arm support 250, but
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the embodiment described above, the inclined frame portion 191 of the rear side frame 190, the second cross member 230, the first reinforcing frame 290, and the third reinforcing frame 310 are connected via the damper support member 240. The invention is not limited thereto, and the inclined frame portion 191 of the rear side frame 190, the second cross member 230, the first reinforcing frame 290, and the third reinforcing frame 310 are directly joined, and the rear suspension damper is joined to the joint portion. It is good also as composition provided with the damper supporting member which supports the upper end of 2 rockably.

  Similarly, although the inclined frame portion 191 of the rear side frame 190, the horizontal frame portion 192, and the second reinforcing frame 300 are connected via the upper arm support member 250, the present invention is not limited thereto. The frame portion 192 and the second reinforcement frame 300 may be directly joined, and an upper arm support member may be provided at the joint portion to pivotally support the connection portion of the upper arm 3.

  Furthermore, although the pillar lower frame 161 of the center pillar 160 and the third reinforcement frame 310 are connected via the pillar connection member 164, the present invention is not limited thereto. The pillar lower frame 161 of the center pillar 160 and the third reinforcement frame It may be directly joined with 310.

Although the center pillar 160 has been described as the pillar member, the present invention is not limited to this, and any pillar member connecting the rear end of the side sill 110 and the rear end of the roof side rail 140 in the vehicle vertical direction It may be a pillar.
In addition, although the center pillar 160 is configured by the pillar lower frame 161 and the pillar upper frame 162, the present invention is not limited to this, and may be a center pillar configured by one aluminum alloy extrusion member.

  In addition, although the vehicle 1 of the double wishbone type rear suspension is used, the present invention is not limited to this. For example, a vehicle of a strut type rear suspension may be used. In this case, the upper arm support member 250 is unnecessary, and the inclined frame portion 191, the horizontal frame portion 192, and the second reinforcing frame 300 are connected or directly joined via the connection member.

  Also, the side sill 110, the tunnel frame 121, the center pillar 160, the floor cross member 180, the rear side frame 190, the rear pillar 200, the first cross member 220, the second cross member 230, the rear cross member 270, the front cross member 280, the first The closed cross-sectional shapes of the reinforcing frame 290, the second reinforcing frame 300, the third reinforcing frame 310, and the fourth reinforcing frame 320 are not limited to the closed cross-sectional shapes of the embodiments described above, and may be any appropriate closed cross-sectional shape.

  In addition, although each frame is made of aluminum alloy, and the damper support member 240, the upper arm support member 250, and the lower arm support member 260 are made of aluminum die casting, the present invention is not limited thereto and may be made of an appropriate metal material.

Moreover, although the upper surface part of the floor tunnel 120 was comprised with two tunnel frames 121, it may not limit to this, and the upper surface part of the floor tunnel 120 may be comprised with one tunnel frame.
In addition, although the roof side rail 140 and the rear pillar 200 are connected via the center pillar 160, the roof side rail 140 and the rear pillar 200 may be directly joined together, and the center pillar may be joined to the joined portion.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... rear suspension damper 3 ... upper arm 4 ... lower arm 110 ... side sill 190 ... rear side frame 191 ... inclined frame part 192 ... horizontal frame part 230 ... second cross member 240 ... damper support member 250 ... upper arm support member 260 ... lower arm support Member 290 ... first reinforcement frame 300 ... second reinforcement frame

Claims (5)

A rear vehicle body structure of a vehicle provided with a pair of left and right rear side frames which are disposed at the rear of the vehicle body of the vehicle and to which upper ends of left and right rear suspension dampers are connected,
The rear side frame is
A damper support portion for supporting the upper end of the rear suspension damper at a desired position above the rear of the vehicle relative to the rear portions of the pair of left and right side sills;
An inclined frame portion extending from a rear portion of the side sill to a rear side of the vehicle and an upper side of the vehicle and having the damper support portion at an upper end;
A front end is connected between the upper end and the lower end of the inclined frame portion, and is constituted by a pair of left and right horizontal frame portions extending toward the rear of the vehicle and substantially horizontal.
A rear vehicle body structure of a vehicle comprising a pair of left and right reinforcing frames connecting the horizontal frame portion rearward of the damper support portion and the damper support portion. 2. The rear vehicle body structure of a vehicle according to claim 1, further comprising a cross member connecting the left and right damper support portions in the vehicle width direction. A lower arm support portion for swingably supporting a lower arm is provided below the horizontal frame portion of the rear side frame, in a vehicle lower side.
The reinforcing frame is
The rear vehicle body structure of a vehicle according to claim 1 or 2, wherein the damper support portion and the lower arm support portion are connected via the horizontal frame portion. The reinforcing frame is a first reinforcing frame,
The first reinforcing frame is
The damper support portion and a rear portion of the lower arm support portion are connected via the horizontal frame portion,
4. The rear vehicle-body structure of a vehicle according to claim 3, further comprising a second reinforcing frame that connects the inclined frame portion and the vicinity of the connection point of the horizontal frame portion and the front portion of the lower arm support portion. The rear side frame is
The rear vehicle body structure of a vehicle according to any one of claims 1 to 4, further comprising an upper arm support portion which is disposed at the front end of the horizontal frame portion and which pivotally supports the upper arm.

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