JP2009061817A - Vehicle body rear structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body rear structure capable of effectively receiving and distributing a load at a rear-end collision. <P>SOLUTION: The vehicle body rear structure comprises a rear wheel house 14 having an upper surface extending in an arch shape in a side view, and a rear side frame 8 which extends in the longitudinal direction of a vehicle body inside the vehicle width direction from the rear wheel house, and is coupled with the lower side of a rear floor pan with the rear end thereof connected to a rear end panel 6 at the rear end of the rear floor pan, and further comprises a reinforcing member 30 for coupling the upper surface of the wheel house with a cab side panel 24 extending thereabove, and a rear side outer frame 22 which extends along the upper surface of a wheel house, and is coupled with the upper surface of the wheel house to form a closed section. In the rear side outer frame, its rear part is coupled with the rear side frame at the back side of the wheel house, and its front part is coupled with the reinforcing member on the upper surface of the wheel house. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body rear structure, and in particular, a rear wheel wheelhouse having an upper surface extending in an arch shape in a side view and a rear end extending in the vehicle longitudinal direction are coupled to a rear end panel of a rear floor pan rear end. The present invention relates to a vehicle body rear structure having a rear side frame.

  Patent Document 1 discloses a vehicle body rear structure in which a rear end cross member and an upper reinforcement of a suspension tower in a rear pillar are connected by a pipe member so that a load at the time of a rear collision is transmitted to the upper reinforcement. Has been.

JP 2005-306192 A

However, in the vehicle body rear structure described in Patent Document 1, the pipe member is not coupled to the rear side frame, and the collision load applied to the rear side frame at the time of a rear collision is received only by the rear side frame as in the past. . Therefore, when a larger load is applied to the rear side frame than the rear end cross member, the rear side frame can only accept the load at the time of rear collision, and the rear part of the vehicle is greatly damaged and the fuel tank is damaged. There is a possibility of fuel leaking or damage to the rear compartment.
In addition, the vehicle body rear structure described in Patent Document 1 can be applied only to a vehicle type having a specific outer shape such as a coupe style. Furthermore, since the pipe member extends straight, the size of the cargo space in the vehicle width direction is reduced.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a vehicle body rear structure that can effectively receive and distribute a load at the time of a rear impact.

  In order to achieve the above object, according to the present invention, a rear wheel house having an upper surface extending in an arch shape in a side view and a rear floor pan extending in the vehicle longitudinal direction from the rear wheel house inward in the vehicle width direction. A rear body frame having a rear side frame coupled to a rear end panel or a rear end cross member at the rear end of the rear floor pan, and extending above and above the upper surface of the wheel house. A reinforcing member that couples to the cab side panel, and a rear side outer frame that extends along the upper surface of the wheel house and is coupled to the upper surface of the wheel house to form a closed cross section. Is connected to the rear side frame on the rear side of the wheel house and the front part is the upper surface of the wheel house It is characterized by being coupled to the reinforcing member in the.

  In the present invention configured as described above, the rear side outer frame is coupled to the rear side frame at the rear side of the wheel house, so that when a rear impact load is input to the rear side frame, the rear impact load is It is transmitted not only to the rear side frame but also to the rear side outer frame. And since it is couple | bonded with the reinforcement member of the upper surface part of a wheel house in the front, the transmitted load can be disperse | distributed to the part above the wheel house of a vehicle body. In addition, the portion of the rear side frame that is behind the coupling portion with the rear side outer frame can be configured as a portion that is crushed at the time of a rear collision and absorbs the collision energy, and on the other hand, is forward of the coupling portion between the rear side outer frame and the rear side frame. Then, the load can be distributed to the rear side frame and the rear side outer frame. In this way, the load at the time of rear collision can be effectively received and dispersed.

  In the present invention, it is preferable that the reinforcing member is a suspension tower gusset provided at a mounting base portion of the rear wheel suspension member.

In the present invention, it is preferable to further include a pillar portion extending in the vertical direction along the rear edge portion of the side door opening, and a part of the reinforcing member is coupled to the pillar portion. .
In the present invention configured as described above, the rear impact load can be transmitted to the pillar portion and dispersed.

  Further, in the present invention, preferably, a rear wheel wheel house having an upper surface portion extending in an arch shape in a side view, and the rear wheel wheel house extending in the vehicle longitudinal direction inward in the vehicle width direction and coupled to the lower surface of the rear floor pan. And a rear body having a rear side frame connected to a rear end panel or a rear end cross member at the rear end of the rear floor pan, and extends vertically along the rear edge of the side door opening. And a rear side outer frame extending along the upper surface of the wheel house and coupled to the upper surface of the wheel house to form a closed cross section. The rear side outer frame has a rear portion on the rear side of the wheel house. To the rear side frame and its front part is connected to the pillar part.

  In the present invention configured as described above, the rear side outer frame is coupled to the rear side frame at the rear side of the wheel house, so that when a rear impact load is input to the rear side frame, the rear impact load is It is transmitted not only to the rear side frame but also to the rear side outer frame. And since it is connected with the pillar part in the front, the transmitted load can be distributed to the pillar part, and further, it can be distributed to the upper part of the vehicle body such as the roof and the side door via the pillar part. In addition, the portion behind the joint between the rear side frame and the rear side outer frame can be configured as a portion that is crushed at the time of a rear collision and absorbs collision energy, and on the other hand, is ahead of the joint between the rear side outer frame and the rear side frame. Then, the load can be distributed to the rear side frame and the rear side outer frame. In this way, the load at the time of rear collision can be effectively received and dispersed.

In the present invention, it is preferable that the rear side outer frame extends from the coupling portion with the rear side frame outward in the vehicle width direction of the rear side frame and forward in the vehicle front-rear direction and upward in the vehicle vertical direction. Has a part.
In the present invention configured as described above, the rear side frame and the rear side outer frame are divided into two branches in a plan view and two branches in a side view in front of the connecting portion between the rear side outer frame and the rear side frame. Therefore, it is difficult for the rear side frame and the rear side outer frame to be bent at the time of a rear collision, and load transmission and dispersion in the axial direction of the rear side frame and the rear side outer frame can be reliably performed. Further, the rear side outer frame can be prevented from being bent upward or outward when a load is input, so that the rear side outer frame can be prevented from jumping out to the inside of the vehicle.

  According to the present invention, it is possible to effectively receive and disperse the load at the time of rear collision.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, the structure of the vehicle body rear structure according to the first embodiment of the present invention will be described.
FIG. 1 is a perspective view of the vehicle body rear structure according to the first embodiment of the present invention viewed from the inside in the vehicle width direction and from above, and FIG. 2 is a vehicle body rear structure according to the first embodiment of the present invention viewed from above. FIG. 3 is a side view of the vehicle body rear structure according to the first embodiment of the present invention as seen from the side.
First, as shown in FIG.1 and FIG.2, the vehicle 1 is No. which extends in the vehicle width direction substantially under the rear seat. No. 3 cross member 2 and No. 3 extending in the vehicle width direction below the cargo compartment behind it. 4 has a cross member 4 and a rear end panel 6 extending in the vehicle width direction so as to partition the cargo compartment and the outside at the rearmost side of the vehicle body. The rear end panel 6 may be provided with a rear end cross member (not shown). No. 3 Cross member 2 and No. 3 The 4 cross member 4 is formed so that a member having a U-shaped cross section is joined to a rear floor pan (not shown) from below to form a closed cross section.

  No. The rear side frame 8 is joined to the rear side of both end portions of the three cross member 2 in the vehicle width direction. No. The four cross members 4 are joined to the inner side surfaces of these rear side frames 8 in the vehicle width direction. As shown in FIGS. 1 to 3, the rear end portion of the rear side frame 8 is joined to the rear end panel 6. It may be joined to a rear end cross member (not shown).

No. The side portions of both ends of the cross member 2 in the vehicle width direction are joined to the substantially rear end portion of the side sill 10 extending in the vehicle longitudinal direction at both left and right edges in the vehicle width direction. A side sill extension (side sill) 12 extending in the longitudinal direction of the vehicle body is joined to the rear end of the side sill 10.
As shown in FIG. 2, the inner side of the side sill 10 and the side sill extension 12 and the outer side of the rear side frame 8 are joined to a connecting member 9 and are connected to each other by the connecting member 9. The front side of the connecting member 9 is 3 It is joined to the cross member 2.

  As shown in FIGS. 1 to 3, a wheel house 14 is formed behind the side sill extension 12 and outside the rear side frame 8 in the vehicle width direction. The wheel house 14 includes a wheel house outer 16 and a wheel house inner 18, and each upper surface portion extends in an arch shape in a side view, and an inner edge in the vehicle width direction on the upper surface portion of the wheel house outer 16, The outer edge of the wheel house inner 18 in the vehicle width direction is overlapped and joined to each other in the substantially horizontal direction (see FIG. 4).

A quarter panel 20 that is formed so as to cover the side sill 10 and the wheel house 14 in the vehicle width direction is provided so as to cover them. The rear edge of the quarter panel 20 is joined to the rear end panel 6.
As shown in FIG. 3, a rear side outer frame 22 is formed on the upper surface portion of the wheel house 14 so as to extend in an arch shape along the upper surface portion of the wheel house 14 in a side view. The rear side outer frame 22 is composed of two members (reference numerals 22a and 22b) as described later.

Here, FIG. 4 shows a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, the rear side outer frame 22 is joined to the vehicle width direction inner edge portion on the upper surface portion of the wheel house outer 16 and the vehicle width direction outer edge portion on the upper surface portion of the wheel house inner 18. It is formed in a U-shaped cross section so as to straddle the part, and is joined to the wheel house 14 to form a closed cross section together with the wheel house 14.
As shown in FIGS. 1, 2, and 4, a cab side panel 24 is formed above the wheel house 14 to separate the cargo compartment from the outer portion thereof. Further, as shown in FIGS. 1 to 3, the lower end portion of the C pillar reinforcement 26 is joined to the inclined portion on the front side of the rear side outer frame 22, and the C pillar reinforcement 26 is attached to the upper roof. It extends toward.

The cab side panel 24 extends from the side surface of the rear edge of the C pillar reinforcement 26 to the rear edge of the wheel house 14, and the front edge is joined to the C pillar reinforcement 26. As shown in FIGS. 1, 2, and 4, the lower edge portion of the cab side panel 24 is formed along the arched shape of the rear side outer frame 22 and joined to the upper surface portion of the rear side outer frame 22. Yes.
As shown in FIG. 5, the cab side panel 24 may be joined to the inner side surface of the rear side outer frame 22 in the vehicle width direction. FIG. 5 is a cross-sectional view similar to FIG. 4 showing a modified example related to the arrangement of the rear side outer frame 22 and the cab side panel 24 according to the first embodiment of the present invention.

  As shown in FIG. 1 to FIG. 3, a suspension tower gusset (reinforcing member) 30 is formed at a portion that is a substantially intermediate portion of the wheel house 14 in the longitudinal direction of the vehicle body and that is a top portion of the upper surface portion of the wheel house 14. Yes. The suspension tower gusset 30 includes a suspension tower gusset outer 32 and a suspension tower gusset inner 34, and is formed so as to sandwich the cab side panel 24, respectively.

  Here, FIG. 6 shows a cross-sectional view taken along line VI-VI in FIG. As shown in FIG. 6, the lower edge portion of the suspension tower gusset outer 32 is joined to the wheel house outer 16, and the upper edge portion is joined to the outer side surface of the cab side panel 24. The lower edge portion of the suspension tower gusset inner 34 is joined to the wheel house inner 18, and the upper edge portion is joined to the inner side surface of the cab side panel 24.

  These suspension tower gussets 30 are formed in a U-shaped cross section so as to form a closed cross section together with the wheel house 14, the cab side panel 24 and the rear side outer frame 22, and the shape of the wheel house 14 and the cab side panel 24. , And such edges are joined to the wheel house 14 and the cab side panel 24.

  FIG. 7 shows a suspension tower gusset according to a modification. FIG. 7 is a perspective view showing a suspension tower gusset according to a modification according to the first embodiment of the present invention. The suspension tower gusset 30 is formed in a shape such that the suspension tower gusset inner 34 extends to the C-pillar reinforcement 26 as shown in FIG. 7 (a), and the suspension tower gusset 30 as shown in FIG. 7 (b). The gusset outer 32 may be formed in a shape extending to the C pillar reinforcement 26 and joined to the C pillar reinforcement 26.

  Next, FIG. 8 shows a plan view of the rear side outer frame at the top of the upper surface of the wheel house 14 as viewed from above. As shown in FIG. 8, the rear side outer frame 22 includes a front side rear outer frame 22a and a rear side rear frame 22b. In FIG. 8, the cab side panel 24 and the suspension tower gusset 30 are not shown. At the top of the upper surface of the wheel house 14, inside the suspension tower gusset 30, as shown in FIG. 8, a front side rear side outer frame 22a and a rear side rear side outer frame 22b are denoted by reference numeral 22c. They are overlapped with each other and joined by spot welding. Thus, the assembly | attachment property is improved by comprising the rear side outer frame 22 with a some member. The joining position between the rear side outer frame 22a and the rear side rear outer frame 22b may be other than the top of the upper surface of the wheel house 14.

  Next, the structure in the vicinity of the rear end portion of the rear side outer frame will be described with reference to FIGS. 9 to 13. FIG. 9 is a perspective view showing the structure in the vicinity of the rear end portion of the wheel house and the rear side outer frame mainly according to the first embodiment of the present invention when viewed from the rear and obliquely upward in the vehicle width direction. FIG. 11 is a perspective view showing parts constituting a rear side pocket formed at the rear of the rear side outer frame according to the first embodiment of the present invention, and FIG. 11 is a rear side outer frame and a rear side outer frame according to the first embodiment of the present invention. FIG. 12 is a perspective view seen from the rear side and obliquely below the vehicle width direction outer side for explaining the structure of the lower, and FIG. 12 explains the structure of the wheel house and the rear side outer frame lower according to the first embodiment of the present invention. FIG. 13 is a perspective view of the rear side door according to the modification according to the first embodiment of the present invention. Is a perspective view showing a joint structure to the rear side outer frame lower the data frame.

  As shown in FIG. 9, the rear side outer frame 22 extends downward along the wheel house 14 from the top of the wheel house 14 toward the rear. A rear side outer frame lower 23 is provided at the rear end. A rear side pocket 36 is provided behind the rear side outer frame lower 23 to accommodate a jack (not shown) and small items. As shown in FIG. 10, the rear side pocket 36 is composed of parts having walls on the rear side frame 8 side, the rear side outer frame lower 23 side, and the lower surface side, and an area surrounded by these parts and the quarter panel 20 is the rear side. It is a pocket 36. A rear bumper 21 is provided below the quarter panel 20. The rear bumper 21 extends to below the rear end panel 6.

  Next, as shown in FIG. 11, the rear end portion of the rear side outer frame 22 is joined to the upper end portion of the rear side outer frame lower 23. As shown in FIG. 12, the rear side outer frame lower 23 has a flange portion 23f extending substantially horizontally along the two sides. As shown in FIG. 11, the rear side outer frame 22 similarly has flange portions 22f along the two sides, and the flange portion 23f and the flange portion 22f are joined to each other. As described above, the rear side outer frame 22 is formed in a U-shaped cross section, and the other one side is formed on the rear side frame 8 via a rear floor pan (not shown) as shown in FIG. It is joined to the flange portion 8f.

  As shown in FIG. 13, the rear edge of the rear side outer frame lower 23 is eliminated to form an opening, and the rear side outer frame 22 is extended downward along the wheel house 14 and then bent into a dogleg shape. Then, the two sides on both sides may be joined to the flange portion 8 f of the rear side frame 8 via the rear floor pan 7 on one side flange portion 23 g of the rear side outer frame lower 23.

  Next, as shown in FIG. 11, one end portion of the rear suspension subframe 40 is coupled to the lower side of the rear side frame 8, and a rear suspension lower arm 42 is attached to the other end portion. A coil spring 44 and a damper 46 are attached to the rear suspension subframe 40 to support the rear suspension lower arm 42. A wheel 48 is attached in the wheel house 14 to the outer end of the rear suspension lower arm 42.

Next, the structure in the vicinity of the front end portion of the rear side outer frame will be described with reference to FIG. FIG. 14 is a perspective view showing the structure in the vicinity of the front end portions of the wheel house and the rear side outer frame according to the first embodiment of the present invention as seen from the front side and obliquely upward in the vehicle width direction.
As shown in FIG. 14, a C pillar reinforcement 26 is joined to the wheel house 14 on the front side of the suspension tower gusset 30. The base end portion of the C pillar reinforcement 26 is joined over the wheel house outer 16, the rear side outer frame 22, and the wheel house inner 18. The C pillar reinforcement 26 may be a B pillar reinforcement in the case of a two-door vehicle or the like.

  Next, as shown in FIG. 14, the rear side outer frame 22 extends along the upper surface of the wheel house 14 from the top of the wheel house 14 toward the front and downward. The lower end portion 22 e is joined to the end portion of the side sill extension 12. More specifically, the side sill extension 12 is abutted against the rear side outer frame 22, and the flange portion 12 g and the flange portion 22 g of the rear side outer frame 22 are joined to the wheel house 14. The lower edge portion of the rear side outer frame 22 coincides with the lower edge portion at the end portion of the side sill extension 12. In addition, the side sill extension 12 and the side sill 10 are located inward of the side sill outer 13 comprised as those outer plates.

Next, the function and effect of the first embodiment will be described.
First, in the first embodiment, a wheel house 14 having an upper surface extending in an arch shape in a side view and extending in the vehicle longitudinal direction from the wheel house 14 in the vehicle width direction are coupled to the lower surface of the rear floor pan 7. The rear end portion has a rear side frame 8 connected to the rear end panel 6 (or rear end cross member) at the rear end portion of the rear floor pan. And it has the suspension tower gusset 30 which couple | bonds the upper surface part of the wheel house 14, and the cab side panel 24 extended above it. Furthermore, it has the rear side outer frame 22 extended along the upper surface part of the wheel house 14 so that a closed cross section may be formed with the upper surface part of the wheel house 14. The rear side outer frame 22 has a rear portion coupled to the rear side frame 8 on the rear side of the wheel house 14 and on the front side of the rear end panel 6, and coupled to the suspension tower gusset 30 on the upper surface portion of the wheel house in front of the rear side outer frame 22.

  Thus, since the rear side outer frame 22 is coupled to the rear side frame 8 at the rear side of the wheel house 14 and at the front side of the rear end panel 6, when a rear impact load is input to the rear side frame 8, The rear impact load is transmitted not only to the rear side frame 8 but also to the rear side outer frame 22. And since it is couple | bonded with the suspension tower gusset 30 of the upper surface part of a wheel house in the front, the transmitted load can be disperse | distributed to the upper part (at least the part above the wheel house 14) of a vehicle body. Further, the rear side frame 8 behind the coupling portion between the rear side outer frame 22 and the rear side frame 8 can be configured as a portion that is crushed at the time of a rear collision and absorbs collision energy, while the rear side outer frame 22 and the rear side frame 8 are arranged. The load can be distributed to the rear side frame 8 and the rear side outer frame 22 in front of the connecting portion.

  Next, since a part of the suspension tower gusset 30 is coupled to the C-pillar reinforcement 26, the rear impact load can be transmitted to the C-pillar reinforcement 26 and dispersed.

Next, the rear side outer frame 22 is connected to the C side pillar reinforcement 26 whose rear portion is coupled to the rear side frame 8 on the rear side of the wheel house 14 and on the front side of the rear end panel 6 and joined to the wheel house 14 on the front side thereof. Are combined.
Therefore, as described above, when a rear impact load is input to the rear side frame 8, the rear impact load is transmitted not only to the rear side frame 8 but also to the rear side outer frame 22. Since the rear side outer frame 22 is coupled to the C pillar reinforcement 26 in the front, the load transmitted to the rear side outer frame 22 is transmitted through the C pillar reinforcement 26 to the vehicle body such as a roof or a side door. Can be dispersed in the upper part of.

  Next, the rear side outer frame 22 extends from the connecting portion with the rear side frame 8 to the outside in the vehicle width direction of the rear side frame 8 and to the front in the vehicle body front-rear direction and to the upper side in the vehicle body vertical direction. In front of the connecting portion between the outer frame 22 and the rear side frame 8, the rear side frame 8 and the rear side outer frame 22 are divided into two branches in a plan view and two branches in a side view. Therefore, the rear side frame 8 and the rear side outer frame 22 are less likely to be bent at the time of a rear collision, and load transmission and dispersion in the axial direction of the frames 8 and 22 can be reliably performed. Further, the rear side outer frame 22 can suppress the bending of the rear side frame 8 upward or outward when a load is input. Further, the rear side outer frame 22 can be prevented from jumping out to the inside of the vehicle.

  Next, in the first embodiment, the wheel house 14 having an upper surface portion that extends in an arch shape in a side view and the lower surface of the rear floor pan 7 that extends from the wheel house 14 in the vehicle longitudinal direction inward in the vehicle width direction. A rear side frame 8 is connected to the rear end panel 6 (or rear end cross member) at the rear end of the rear floor pan. And it has the side sill 10 extended in the vehicle body front-back direction in the lower edge part of the side door of the vehicle width direction outer side. Furthermore, it has the rear side outer frame 22 extended along the upper surface part of the wheel house 14 so that a closed cross section may be formed with the upper surface part of the wheel house 14. The rear side outer frame 22 is coupled to the rear side frame 8 on the rear side of the wheel house 14 and on the front side of the rear end panel 6 and to the rear portion of the side sill 12 on the front side.

  Thus, since the rear side outer frame 22 is coupled to the rear side frame 8 at the rear side of the wheel house 14 and at the front side of the rear end panel 6, when a rear impact load is input to the rear side frame 8, The rear impact load is transmitted not only to the rear side frame 8 but also to the rear side outer frame 22. Since the rear side outer frame 22 is coupled to the rear portion of the side sill 12 in the front, the transmitted load can be distributed to the side sills 10 and 12. Further, the rear side frame 8 behind the coupling portion between the rear side outer frame 22 and the rear side frame 8 can be configured as a portion that is crushed at the time of a rear collision and absorbs collision energy, while the rear side outer frame 22 and the rear side frame 8 are arranged. The load can be distributed to the rear side frame 8 and the rear side outer frame 22 in front of the connecting portion.

  Next, since the rear side frame 8 is connected to the inner portions of the side sills 10 and 12 in the vehicle width direction, the rear impact load is distributed through the two paths of the rear side frame 8 and the rear side outer frame 22, and the side sills 10 are dispersed. , 12, the load can be transmitted to the side sills 10, 12 more reliably.

Next, the rear side outer frame 22 includes a first rear side outer frame 22b that extends upward and forward along the upper surface portion of the wheel house 14 from the rear portion coupled to the rear side frame 8, and the side sills 10, 12. A second rear side outer frame 22a that extends upward and rearward along the upper surface of the wheel house 14 from the front portion coupled to the rear portion; The rear portion 22a of the two rear side outer frames is coupled.
As described above, the rear side outer frame 22 is composed of two members to ensure assemblability, and the front part of the first rear side outer frame 22a and the rear part of the second rear side outer frame 22b are combined. Thus, reliable load distribution can be realized.

  Next, since the rear side outer frame 22 is connected to a C pillar reinforcement 26 extending in the vertical direction along the rear edge of the side door opening, the rear impact load transmitted to the rear side outer frame 22 is transmitted to the side sills. 10 and 12 as well as the C pillar reinforcement 26 can be distributed and transmitted.

  Next, since the rear side outer frame 22 is connected to a suspension tower gusset 30 that joins the upper surface portion of the wheel house 14 and the cab side panel 24 extending thereabove, the rear impact load transmitted to the rear side outer frame 22 is reduced. Not only the side sills 10 and 12 but also the suspension gusset 30 can be distributed and transmitted to the upper part of the vehicle body.

  Next, a second embodiment of the present invention will be described with reference to FIGS. 15 and 16. FIG. 15 is a perspective view of the structure in the vicinity of the front end portion of the wheel house, C pillar reinforcement, and rear side outer frame according to the second embodiment of the present invention, viewed from the front side and obliquely upward in the vehicle width direction. FIG. 16 is a partially enlarged perspective view showing an enlarged structure of the joint portion between the rear side outer frame and the C pillar reinforcement according to the second embodiment of the present invention. In the second embodiment, the configuration of the C pillar reinforcement 50, the configuration of the rear side outer frame 52, and the configuration of the cab side panel 54 are greatly different from those of the first embodiment, and other configurations are different from those of the first embodiment. It is almost the same. Here, the description of the same configuration as that of the first embodiment is omitted.

As shown in FIG. 15, the C pillar reinforcement 50 includes a C pillar reinforcement upper 50a and a C pillar reinforcement lower 50b.
The lower end portion 50 e of the C pillar reinforcement lower 50 b is joined to the end portion of the side sill extension 56. More specifically, the side sill extension 56 is abutted against the C pillar reinforcement lower 50b, and the flange portion 56g and the flange portion 50g of the C pillar reinforcement lower 50b are both joined to the wheel house 14. ing.

  The C pillar reinforcement lower 50b is formed in a U-shaped cross section, and its flange portion 50g is joined to the wheel house 14 to form a closed cross section together with the wheel house 14. The C pillar reinforcement lower 50 b extends from the lower end portion upward along the wheel house 14 and terminates at an inclined portion in front of the top portion of the wheel house 14. As shown in FIG. 16, the lower end portion of the C-pillar reinforcement upper 50a is inserted into the end portion of the C-pillar reinforcement lower 50b and joined to each other.

  As shown in FIG. 16, a C-pillar reinforcement upper 50a has a U-shaped member 50c and an L-shaped member 50d joined together to form a closed cross-section with a B-shaped cross section. It is supposed to be. The lower end portion of the C pillar reinforcement upper 50a is formed to be slightly smaller in size than the main body thereof and is inserted into the C pillar reinforcement lower 50b. The upper end portion of the C pillar reinforcement upper 50 a is joined to the roof side frame 60.

  As shown in FIGS. 15 and 16, the rear side outer frame 52 extends forward along the wheel house 14 from the rear end of the wheel house 14 in the longitudinal direction of the vehicle body, as in the first embodiment. , And ends at the C pillar reinforcement upper 50a. A flange portion 52f is formed at a terminal portion of the rear side outer frame 52, and is joined to a rear side surface of the C pillar reinforcement upper 50a. In the second embodiment, as shown in FIG. 16, the cab side panel 54 is joined to the inner side surface of the rear side outer frame 52 in the vehicle width direction. This shows the same cross section as FIG. 5 described above.

Since the operational effects of the second embodiment are also substantially the same as those of the first embodiment, only significant differences will be described.
In the second embodiment, the wheel house 14 having an upper surface extending in an arch shape in a side view and the rear end of the wheel house 14 extending in the vehicle longitudinal direction inward in the vehicle width direction and coupled to the lower surface of the rear floor pan. Has a rear side frame 8 connected to the rear end panel 6 (or rear end cross member) at the rear end of the rear floor pan. Further, the upper surface portion of the wheel house 14 is formed so that a closed cross section is formed by the C pillar reinforcement 50 that is a reinforcing member extending in the vertical direction along the rear edge portion of the side door opening portion and the upper surface portion of the wheel house 14. And a rear side outer frame 52 extending along the vertical axis. The rear side outer frame 52 is coupled to the rear side frame 8 on the rear side of the wheel house 14 and on the front side of the rear end panel 6 and to the C pillar reinforcement 50 on the front side thereof.

  Thus, since the rear side outer frame 52 is coupled to the rear side frame 8 at the rear side of the wheel house 14 and the front side of the rear end panel 6, when a rear impact load is input to the rear side frame 8, The rear impact load is transmitted not only to the rear side frame 8 but also to the rear side outer frame 52. Since the rear side outer frame 52 is coupled to the C pillar reinforcement 50 in the front, the transmitted load is also transmitted to the C pillar reinforcement 50, and further, via the C pillar reinforcement 50. Can be dispersed on the roof, door or side sill. Further, the rear side frame 8 behind the connecting portion between the rear side outer frame 52 and the rear side frame 8 can be configured as a portion that is crushed at the time of a rear collision and absorbs collision energy, while the rear side outer frame 52 and the rear side frame 8 The load can be distributed to the rear side frame 8 and the rear side outer frame 52 in front of the connecting portion.

  Next, the rear portion of the rear side outer frame 52 is coupled to the rear side frame 8 on the rear side of the wheel house 14 and on the front side of the rear end panel 6, and is coupled to the suspension tower gusset 30 on the upper surface portion of the wheel house on the front side. Therefore, when a rear collision load is input to the rear side frame 8, the rear collision load is transmitted not only to the rear side frame 8 but also to the rear side outer frame 52. And since it is couple | bonded with the suspension tower gusset 30 of the upper surface part of a wheel house in the front, the transmitted load can be disperse | distributed to the upper part (at least the part above the wheel house 14) of a vehicle body. Further, the rear side frame 8 behind the connecting portion between the rear side outer frame 52 and the rear side frame 8 can be configured as a portion that is crushed at the time of a rear collision and absorbs collision energy, while the rear side outer frame 52 and the rear side frame 8 The load can be distributed to the rear side frame 8 and the rear side outer frame 52 in front of the connecting portion.

  Next, the rear side outer frame 52 extends from the connecting portion with the rear side frame 8 outward in the vehicle width direction of the rear side frame 8 and forward in the longitudinal direction of the vehicle body, and extends upward in the vertical direction of the vehicle body. In front of the connecting portion between the outer frame 52 and the rear side frame 8, the rear side frame 8 and the rear side outer frame 52 are divided into two branches in a plan view and two branches in a side view. Therefore, the rear side frame 8 and the rear side outer frame 52 are difficult to bend at the time of a rear collision, and load transmission and dispersion in the axial direction of each frame 8, 52 can be reliably performed. Further, the rear side outer frame 52 can suppress bending of the rear side frame 8 upward or outward when a load is input. Further, the rear side outer frame 52 can be prevented from jumping out to the inside of the vehicle.

It is the perspective view which looked at the vehicle body rear part structure by 1st Embodiment of this invention from the vehicle width direction inner side and upper direction. It is the top view which looked at the vehicle body rear part structure by 1st Embodiment of this invention from upper direction. It is the side view which looked at the vehicle body rear part structure by 1st Embodiment of this invention from the side. It is sectional drawing seen along the IV-IV line of FIG. FIG. 5 is a cross-sectional view showing a modified example related to the arrangement of the rear side outer frame 22 and the cab side panel 24 according to the first embodiment of the present invention, similarly to FIG. 4. It is sectional drawing seen along the VI-VI line of FIG. It is a perspective view which shows the suspension tower gusset by a modification. It is a perspective view which shows the suspension tower gusset by the modification by 1st Embodiment of this invention. It is the perspective view seen from the back of the vehicle width direction outward and the diagonally upper side which mainly shows the structure of the rear-end part vicinity of a wheel house and a rear side outer frame by 1st Embodiment of this invention. FIG. 3 is a perspective view showing components constituting a rear side pocket formed at the rear of the rear side outer frame according to the first embodiment of the present invention. It is the perspective view seen from the back side of the vehicle width direction outside and the slanting lower part for explaining the structure of the rear side outer frame and rear side outer frame lower by a 1st embodiment of the present invention. It is a perspective view for demonstrating the structure of the wheel house and rear side outer frame lower by 1st Embodiment of this invention, and is a figure which abbreviate | omitted illustration of other components. FIG. 6 is a perspective view showing a joining structure of a rear side outer frame to a rear side outer frame lower according to a modification according to the first embodiment of the present invention. It is the perspective view seen from the front side of the vehicle width direction outer side and the diagonally upper side which mainly shows the structure of the front-end part vicinity of a wheel house and a rear side outer frame by 1st Embodiment of this invention. It is the perspective view seen from the front side of the vehicle width direction outside and the diagonally upper side which shows the structure near the front-end part of the wheel house, C pillar reinforcement, and rear side outer frame by 2nd Embodiment of this invention. It is a partial expansion perspective view which expands and shows the structure of the junction part of the rear side outer frame and C pillar reinforcement by 2nd Embodiment of this invention.

Explanation of symbols

1 Vehicle 8 Rear side frame 10 Side sill 12, 56 Side sill extension (side sill)
14 wheel house 22, 52 rear side outer frame 23 rear side outer frame lower 24, 54 cab side panel 26, 50 C pillar reinforcement 30 suspension tower gusset

Claims (5)

A rear wheel house having an upper surface extending in an arch shape when viewed from the side, and extending in the vehicle longitudinal direction from the rear wheel house in the vehicle width direction and coupled to the lower surface of the rear floor pan and the rear end portion of the rear floor A vehicle body rear structure having a rear side frame connected to a rear end panel or a rear end cross member at the rear end of the pan,
A reinforcing member that joins the upper surface of the wheel house and a cab side panel extending above the wheel house;
A rear side outer frame that extends along the upper surface of the wheel house and is coupled to the upper surface of the wheel house to form a closed cross-section;
The rear side outer frame has a rear portion coupled to the rear side frame on the rear side of the wheel house and a front portion coupled to the reinforcing member at the upper surface portion of the wheel house. .   The vehicle body rear part structure according to claim 1, wherein the reinforcing member is a suspension tower gusset provided at a mounting base portion of a rear wheel suspension member. Furthermore, it has a pillar portion extending in the vertical direction along the rear edge of the side door opening,
The vehicle body rear part structure according to claim 1 or 2, wherein a part of the reinforcing member is coupled to the pillar part. A rear wheel house having an upper surface extending in an arch shape when viewed from the side, and extending in the vehicle longitudinal direction from the rear wheel house in the vehicle width direction and coupled to the lower surface of the rear floor pan and the rear end portion of the rear floor A vehicle body rear structure having a rear side frame connected to a rear end panel or a rear end cross member at a rear end of the pan,
A pillar portion extending vertically along the rear edge of the side door opening,
A rear side outer frame that extends along the upper surface of the wheel house and is coupled to the upper surface of the wheel house to form a closed cross-section;
The rear body outer structure according to any one of claims 1 to 3, wherein a rear portion of the rear side outer frame is coupled to the rear side frame at a rear side of the wheel house and a front portion thereof is coupled to the pillar portion. .   2. The rear side outer frame has a portion extending from a connecting portion with the rear side frame to an outer side in the vehicle width direction of the rear side frame and forward in a front-rear direction of the vehicle body and upward in a vertical direction of the vehicle body. The vehicle body rear structure according to any one of claims 1 to 4.

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