JP2019123459A - Rear part vehicle body structure of vehicle - Google Patents

Abstract

To provide a rear part vehicle body structure of a vehicle 1 which efficiently transmits a load acting on damper support members 240 in a dispersing manner.SOLUTION: A rear part vehicle body structure of a vehicle 1 includes a pair of left and right damper support members 240 supporting upper ends of rear suspension dampers 2, and the damper support members 240 are disposed at desired positions located at the vehicle rear and lower side relative to rear ends of a pair of left and right roof side rails 140. The rear part vehicle body structure of the vehicle 1 further includes: a pair of left and right lower arm support members 260 which swingably supports lower arms 4; a pair of left and right rear pillars 200 which couples rear ends of the roof side rails 140 to the damper support members 240; and a pair of left and right first reinforcement frames 290 which couples the damper support members 240 to rear parts of the lower arm support members 260. Each lower arm support member 260 is disposed near an extension line of a virtual straight line connecting the rear end of the roof side rail 140 to the damper support member 240 in a back view.SELECTED DRAWING: Figure 3

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, in the rear vehicle body structure of the vehicle, it is required that the load acting on the damper support portion supporting the rear suspension damper be efficiently dispersed and transmitted from the damper support portion to a further distance of the vehicle body. Therefore, in the rear vehicle body structure of the vehicle, it is necessary to configure a load transfer path capable of efficiently distributing and transmitting the load acting on the damper support portion, for example, by a framework member supporting the damper support portion.

At this time, it is desirable that the load transfer path be configured by arranging a substantially linear skeleton member with few curved portions substantially parallel to the input direction of the load acting on the damper support portion.
However, in general, the appearance design at the rear of the vehicle is often narrow in the vehicle width direction from the vehicle front side to the vehicle rear end, and the height in the vehicle vertical direction is often low. For this reason, when the frame member is disposed according to the appearance design of the vehicle to configure the rear vehicle body, the desirable shape of the frame member as described above can not constitute a desirable load transfer path, and acts on the damper support portion. There was a risk that the load could not be distributed efficiently.

JP, 2016-222223, A

  An object of the present invention is to provide a rear vehicle body structure of a vehicle capable of efficiently distributing and transmitting a load acting on a damper support portion in view of the problems described above.

  The present invention comprises a pair of left and right damper support portions for supporting the upper end of a rear suspension damper of a vehicle, and for a rear end of the pair of left and right roof side rails extending in the longitudinal direction of the vehicle at a predetermined distance in the vehicle width direction. A rear vehicle body structure of a vehicle in which the damper support portion is disposed at a desired position at the rear lower side of the vehicle, and a pair of left and right lower arms support swingably supporting lower arms located below the damper support portion. , A rear end of the roof side rail, and a pair of left and right rear pillars connecting the damper support, a pair of left and right rear frames connecting the damper support and the rear of the lower arm support, The lower arm support portion is disposed in the vicinity of an extension of a virtual straight line connecting the rear end of the roof side rail and the damper support portion in a rear view. That.

According to the present invention, the rear vehicle body structure of the vehicle can efficiently disperse and transmit the load acting on the damper support portion.
Specifically, in rear view, the lower arm support portion is disposed in the vicinity of an extension of a virtual straight line connecting the rear end of the roof side rail and the damper support portion. The rear end of the damper support portion can be easily connected with the rear pillar having a substantially linear shape with few curved portions in rear view, and the rear portion of the damper support portion and the lower arm support portion can be viewed in rear view It can be easily connected by the rear frame of a substantially linear shape with few curved portions.

  Therefore, the rear vehicle body structure of the vehicle can configure a substantially linear load transfer path with few curved portions by the load transfer path passing through the rear pillar and the load transfer path passing through the rear frame in rear view .

  Thus, the rear vehicle body structure of the vehicle transmits the load transmission path through the rear pillar and the load transfer path through the rear frame, among the load acting on the damper support portion, the load component in the vehicle vertical direction and the load component in the vehicle longitudinal direction. It can be efficiently transmitted to the route.

  Therefore, when the load via the rear suspension damper acts on the damper support portion, the rear body structure of the vehicle applies the load acting on the damper support portion to the load transfer path passing through the rear pillar and the load transfer path passing through the rear frame. It can be distributed and transmitted efficiently.

As an aspect of the present invention, the rear pillar may include reinforcement for connecting the front end of the rear pillar in the vehicle width direction, and a cross member for connecting the rear of the lower arm support portion in the vehicle width direction.
According to the present invention, the rear body structure of the vehicle can improve the rigidity in the vehicle width direction of the rear body in the range from the front end of the rear pillar to the lower arm support portion.

For this reason, the rear vehicle body structure of the vehicle can suppress the occurrence of twisting or falling due to the load acting on the damper support portion in the rear pillar and the rear frame.
Thus, the rear vehicle body structure of the vehicle can improve the load transfer efficiency of the load transfer path through the rear pillar and the load transfer efficiency of the load transfer path through the rear frame.

  Therefore, the rear body structure of the vehicle can disperse and transmit the load acting on the damper support more efficiently by the reinforcement connecting the left and right rear pillars and the cross member connecting the left and right lower arm supports. .

  Further, as an aspect of the present invention, the rear pillar is formed in a shape having a side view curved portion that is curved toward the damper support portion located below the rear of the roof with respect to the rear end of the roof side rail in side view The rear header may be provided to connect the side curved portions of the rear pillar in the vehicle width direction.

According to the present invention, the rear vehicle body structure of the vehicle can stably disperse and transmit the load acting on the damper support portion.
Specifically, since the curved portion in the side view of the rear pillar is an inflection portion in the load transfer direction, the rigidity is lower than that of the portion other than the curved portion in the side view, and the load transfer efficiency tends to be reduced.

Thus, by providing the rear header that connects the side pillars of the rear pillar, the rear body structure of the vehicle can improve the rigidity of the side pillar of the rear pillar. Therefore, the rear vehicle body structure of the vehicle can prevent the deformation of the curved portion in a side view due to the load transmitted from the damper support portion, and can suppress the decrease in the load transfer efficiency in the curved portion in a side view.
Thus, the rear body structure of the vehicle can suppress a decrease in load transfer efficiency of the load transfer path passing through the rear pillar, so that the load acting on the damper support can be efficiently dispersed and transferred through the rear pillar. .

  Further, as an aspect of the present invention, the rear pillar has a shape having a rear view curved portion curved toward the damper support portion positioned on the lower inside in the vehicle width direction with respect to the rear end of the roof side rail in rear view. And a pair of left and right pillar members connecting the rear ends of the pair of left and right side sills located on the lower side in the vehicle width direction with respect to the rear end of the roof side rail, and the rear end of the roof side rail; And a pair of left and right reinforcing frames that connect the pillar members substantially linearly.

According to the present invention, the rear body structure of the vehicle can improve the support rigidity of the rear body to support the damper support, and can efficiently disperse and transmit the load acting on the damper support.
Specifically, in the rear body structure of the vehicle, in addition to the rear pillar and the rear frame, the damper support portion can be supported by a reinforcing frame connected to a pillar member which is a high rigidity portion.

  Furthermore, the rear vehicle body structure of the vehicle can form a substantially triangular shape in a rear view configured of the rear pillar, the pillar member, and the reinforcing frame. That is, in the rear vehicle body structure of the vehicle, a truss structure can be formed on the upper portion of the rear vehicle body by the rear pillar, the pillar member and the reinforcing frame.

  Then, when the load via the rear suspension damper acts on the damper support portion, the rear vehicle body structure of the vehicle sets, among the loads acting on the damper support portion, a load component in the vehicle longitudinal direction and a load component in the vehicle vertical direction It is possible to distributively transmit the load transfer path through the rear pillar, the load transfer path through the rear frame, and the load transfer path through the reinforcing frame.

  Thereby, the rear body structure of the vehicle can reduce the ratio of the load transmitted to the rear pillar to the load acting on the damper support portion, as compared with the case where the reinforcing frame is not provided. Therefore, in the rear body structure of the vehicle, it is possible to suppress that the load transfer efficiency for transmitting the load acting on the damper support portion to the distant side of the vehicle body is lowered by the curved portion in the rear view of the rear pillar.

  Therefore, the rear vehicle body structure of the vehicle can improve the support rigidity of the rear vehicle body to support the damper support portion by the pair of left and right pillar members and the pair of left and right reinforcement frames, and efficiently apply the load acting on the damper support portion. It can be distributed and transmitted.

Further, as an aspect of the present invention, a pair of left and right rear side frames which connect the damper supporting portion located on the upper rear side and the inner side in the vehicle width direction with respect to the rear portion of the side sill and the rear portion of the side sill substantially linearly You may have.
According to the present invention, the rear vehicle body structure of the vehicle can further improve the support rigidity of the rear vehicle body to support the damper support portion, and can more reliably disperse and transmit the load acting on the damper support portion.

Specifically, in addition to the rear pillar, the rear frame, and the reinforcement frame, the rear body structure of the vehicle can support the damper support portion by the rear side frame which is a high rigidity portion.
Furthermore, the rear vehicle body structure of the vehicle forms a rear view approximately triangle formed of the pillar member, the reinforcement frame, and the rear side frame adjacent to a rear view approximately triangle formed of the rear pillar, the pillar member, and the reinforcement frame. be able to.

  That is, in the rear body structure of the vehicle, a truss structure adjacent to the truss structure formed on the upper portion of the rear body can be formed in the lower portion of the rear body with the rear pillar, the pillar member and the reinforcing frame. For this reason, the rear body structure of the vehicle can further improve the support rigidity with which the rear body supports the damper support.

  When the load via the rear suspension damper acts on the damper support portion, the rear vehicle body structure of the vehicle sets the load component in the longitudinal direction of the vehicle and the load component in the vertical direction of the vehicle among the loads acting on the damper support portion. The load transfer path through the rear pillar, the load transfer path through the rear frame, the load transfer path through the reinforcing frame, and the load transfer path through the rear side frame can be dispersedly transmitted.

  As a result, the rear body structure of the vehicle can suppress the displacement of the damper support portion due to the input load from the rear suspension damper, and disperses and more reliably transmits the load acting on the damper support portion further from the rear body. be able to.

  Therefore, the rear vehicle body structure of the vehicle can further improve the support rigidity of the rear vehicle body to support the damper support portion by the pair of left and right rear side frames, and can more reliably disperse and transmit the load acting on the damper support portion. .

  According to the present invention, it is possible to provide a rear vehicle body structure of a vehicle capable of efficiently distributing and transmitting the load acting on the damper support portion.

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, the left and right roof support rails 240 for supporting the upper end of the rear suspension damper 2 of the vehicle 1 are provided, and the left and right roof side rails 140 extend in the vehicle longitudinal direction at positions separated by a predetermined distance in the vehicle width direction. The rear body structure of the vehicle 1 in which the damper support member 240 is disposed at a desired position below the rear of the vehicle with respect to the rear end swingably supports the lower arm 4 located below the damper support member 240 in the vehicle. A pair of left and right lower arm support members 260, a rear end of the roof side rail 140, and a pair of left and right rear pillars 200 connecting the damper support member 240, and a pair of left and right pairs connecting the rear portions of the damper support member 240 and the lower arm support member 260. And the lower arm support member 260 is a rear end of the roof side rail 140 in a rear view. By disposed near an extended line of a virtual straight line connecting the damper supporting member 240 can be a load applied to the damper supporting member 240 to efficiently dispersed and transmitted.

  Specifically, in a rear view, lower arm support member 260 is disposed in the vicinity of an extension of a virtual straight line connecting the rear end of roof side rail 140 and damper support member 240, so that the rear body structure of vehicle 1 is The rear end of the roof side rail 140 and the damper support member 240 can be easily connected by the rear pillar 200 having a substantially linear shape with few curved portions in rear view, and the damper support member 240 and the lower arm support member The rear portion 260 can be easily connected by the first reinforcing frame 290 having a substantially linear shape with few curved portions in rear view.

  For this reason, the rear vehicle body structure of the vehicle 1 has a substantially linear load transfer path with few curved portions by the load transfer path through the rear pillar 200 and the load transfer path through the first reinforcing frame 290 in rear view. It can be configured.

  Thus, the rear body structure of the vehicle 1 includes the load transfer path through the rear pillar 200 and the first reinforcement, among the load acting on the damper support member 240, the load component in the vehicle vertical direction and the load component in the vehicle longitudinal direction. The load can be efficiently transmitted to the load transfer path through the frame 290.

  Therefore, in the rear body structure of the vehicle 1, when the load via the rear suspension damper 2 acts on the damper support member 240, the load acting on the damper support member 240 is transmitted through the rear pillar 200 and the first reinforcement frame It can be distributed and transmitted efficiently to the load transfer path through 290.

  In addition, a roof reinforcement 170 for connecting the front end of the rear pillar 200 in the vehicle width direction and a rear cross member 270 for connecting the rear of the lower arm support member 260 in the vehicle width direction The structure can improve the rigidity in the vehicle width direction of the rear vehicle body in the range from the front end of the rear pillar 200 to the lower arm support member 260.

For this reason, the rear vehicle body structure of the vehicle 1 can suppress the occurrence of twisting or tilting of the rear pillar 200 and the first reinforcing frame 290 due to the load acting on the damper support member 240.
Thereby, the rear vehicle body structure of the vehicle 1 can improve the load transfer efficiency of the load transfer path through the rear pillar 200 and the load transfer efficiency of the load transfer path through the first reinforcing frame 290.

  Therefore, in the rear vehicle body structure of the vehicle 1, the load acting on the damper support member 240 by the roof reinforcement 170 connecting the left and right rear pillars 200 and the rear cross member 270 connecting the left and right lower arm support members 260 is It can be distributed and transmitted more efficiently.

  Further, in a side view, rear pillar 200 is formed in a shape having a curved portion 200b curved toward damper support member 240 located below the rear end of roof side rail 140 toward the rear of the vehicle. The rear vehicle body structure of the vehicle 1 can stably disperse and transmit the load acting on the damper support member 240 by providing the rear header 210 that connects 200 b in the vehicle width direction.

Specifically, since the curved portion 200b of the rear pillar 200 is an inflection portion in the load transfer direction, the rigidity is lower than that of the portion other than the curved portion 200b, and the load transfer efficiency is likely to be reduced.
Therefore, by providing the rear header 210 connecting the curved portion 200b of the rear pillar 200, the rear vehicle body structure of the vehicle 1 can improve the rigidity of the curved portion 200b of the rear pillar 200.

Therefore, the rear vehicle-body structure of the vehicle 1 can prevent the deformation of the curved portion 200b due to the load transmitted from the damper support member 240, and can suppress the reduction in load transfer efficiency in the curved portion 200b.
As a result, the rear vehicle body structure of the vehicle 1 can suppress a decrease in load transfer efficiency of the load transfer path through the rear pillar 200, so that the load acting on the damper support member 240 can be distributed efficiently through the rear pillar 200. can do.

  Further, the rear pillar 200 is formed in a shape having a curved portion 200b curved toward the damper support member 240 located at the lower inside in the vehicle width direction with respect to the rear end of the roof side rail 140 in rear view Rear ends of a pair of left and right side sills 110 located on the lower side in the vehicle width direction with respect to a rear end of the 140 and a pair of left and right center pillars 160 connecting a rear end of the roof side rail 140, a damper support member 240, and a center pillar The rear vehicle body structure of the vehicle 1 can improve the support rigidity with which the rear vehicle body supports the damper support member 240 by providing the left and right third reinforcing frames 310 that connect the 160 substantially linearly, and can also support the damper support The load acting on the member 240 can be distributed and transmitted efficiently.

  Specifically, in addition to the rear pillar 200 and the first reinforcing frame 290, the rear body structure of the vehicle 1 supports the damper supporting member 240 by the third reinforcing frame 310 connected to the center pillar 160 which is a high rigidity portion. can do.

  Furthermore, the rear vehicle-body structure of the vehicle 1 can form a substantially triangular shape in a rear view formed of the rear pillar 200, the center pillar 160, and the third reinforcing frame 310. That is, in the rear vehicle body structure of the vehicle 1, the rear pillar 200, the center pillar 160, and the third reinforcing frame 310 can form a truss structure in the upper portion of the rear vehicle body.

  When the load via the rear suspension damper 2 acts on the damper support member 240, the rear 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. The load components can be distributively transferred to the load transfer path through the rear pillar 200, the load transfer path through the first reinforcing frame 290, and the load transfer path through the third reinforcing frame 310.

  Thereby, the rear body structure of the vehicle 1 can make the ratio of the load transmitted to the rear pillar 200 among the loads acting on the damper support member 240 smaller than in the case where the third reinforcing frame 310 is not provided. it can. For this reason, the rear vehicle body structure of the vehicle 1 can suppress the decrease in load transfer efficiency for transmitting the load acting on the damper support member 240 to the distant side of the vehicle body by the curved portion 200b of the rear pillar 200.

  Therefore, the rear vehicle body structure of the vehicle 1 can improve the support rigidity of the rear vehicle body to support the damper support member 240 by the pair of left and right center pillars 160 and the pair of left and right third reinforcement frames 310. It is possible to disperse and transmit the load applied to the

  Also, by providing a pair of left and right rear side frames 190 that substantially linearly connect the damper support member 240 located on the vehicle rear upper side and the vehicle width direction inner side with respect to the rear of the side sill 110 and the rear of the side sill 110 The rear vehicle-body structure of the vehicle 1 can further improve the support rigidity with which the rear vehicle-body supports the damper support member 240, and can more reliably disperse and transmit the load acting on the damper support member 240.

  Specifically, in addition to the rear pillar 200, the first reinforcement frame 290, and the third reinforcement frame 310, the rear body structure of the vehicle 1 may support the damper support member 240 by the rear side frame 190, which is a high rigidity portion. it can.

  Furthermore, the rear vehicle body structure of the vehicle 1 is adjacent to a substantially triangular shape in a rear view formed of the rear pillar 200, the center pillar 160 and the third reinforcing frame 310, and the center pillar 160, the third reinforcing frame 310 and the rear side frame 190 It is possible to form a substantially triangular shape in a rear view configured by

  That is, the rear body structure of the vehicle 1 may be configured by the rear pillar 200, the center pillar 160, and the third reinforcing frame 310 to form a truss structure adjacent to the truss structure configured on the upper portion of the rear body in the lower portion of the rear body. it can. For this reason, the rear body structure of the vehicle 1 can further improve the support rigidity with which the rear body supports the damper support member 240.

  When the load via the rear suspension damper 2 acts on the damper support member 240, the rear 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. The load components are distributively transmitted to the load transfer path through rear pillar 200, the load transfer path through first reinforcing frame 290, the load transfer path through third reinforcing frame 310, and the load transfer path through rear side frame 190. be able to.

  Thereby, the rear body structure of the vehicle 1 can suppress the displacement of the damper support member 240 due to the input load from the rear suspension damper 2, and the load acting on the damper support member 240 can be more surely distant from the rear body. It can be distributed and transmitted.

  Therefore, the rear vehicle body structure of the vehicle 1 can further improve the support rigidity of the rear vehicle body to support the damper support member 240 by the pair of left and right rear side frames 190, and more reliably distribute and transmit the load acting on the damper support member 240 can do.

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 lower arm support portion corresponds to the lower arm support member 260,
The rear frame corresponds to the first reinforcing frame 290,
The reinforcement corresponds to the roof reinforcement 170,
The cross member corresponds to the back cross member 270,
The side view curved portion and the back view curved portion correspond to the curved portion 200b,
The pillar member corresponds to the center pillar 160,
The reinforcement frame corresponds to the third reinforcement frame 310, 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 4 lower arm 110 side sill 140 roof side rail 160 center pillar 170 roof reinforcement 190 rear side frame 200 rear pillar 200b curved portion 210 rear header 240 damper support member 260 lower arm Support member 270 ... rear cross member 290 ... first reinforcement frame 310 ... third reinforcement frame

Claims (5)

A pair of left and right damper support portions for supporting an upper end of a rear suspension damper of the vehicle;
A rear vehicle body structure of a vehicle in which the damper support portion is disposed at a desired position below the rear of the vehicle with respect to the rear ends of a pair of left and right roof side rails extending in the longitudinal direction of the vehicle at predetermined positions in the vehicle width direction. And
A pair of left and right lower arm support portions for swingably supporting lower arms located below the damper support portion in the vehicle;
A rear end of the roof side rail and a pair of left and right rear pillars connecting the damper support portion;
The damper support portion and a pair of left and right rear frames that connect the rear portions of the lower arm support portion,
The lower arm support portion is
A rear body structure of a vehicle disposed in the vicinity of an extension of a virtual straight line connecting a rear end of the roof side rail and the damper support portion in a rear view. Reinforcement which connects the front end of the rear pillar in the vehicle width direction;
The rear vehicle body structure of a vehicle according to claim 1, further comprising: a cross member connecting a rear portion of the lower arm support portion in a vehicle width direction. The rear pillar is
In a side view, the roof side rail is formed in a shape having a side view curved portion that is curved toward the damper support portion positioned below the rear of the vehicle with respect to the rear end of the roof side rail,
The rear body structure of a vehicle according to claim 1 or 2, further comprising a rear header that connects the curved portion in a side view of the rear pillar in the vehicle width direction. The rear pillar is
In a rear view, the roof side rail is formed in a shape having a rear view curved portion curved toward the damper support located at the lower inside in the vehicle width direction with respect to the rear end of the roof side rail.
A rear portion of a pair of left and right side sills located on an outer lower side in a vehicle width direction with respect to a rear end of the roof side rail, and a pair of left and right pillar members connecting the rear end of the roof side rail;
The vehicle rear body structure according to any one of claims 1 to 3, further comprising a pair of left and right reinforcing frames that connect the damper support portion and the pillar members substantially linearly. 5. The vehicle according to claim 4, further comprising: a pair of left and right rear side frames that connect the damper supporting portion positioned on the upper rear side and the inner side in the vehicle width direction with respect to the rear portion of the side sill and the rear portion of the side sill substantially linearly. Rear body structure of the vehicle.

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