JP6477777B2 - Rear body structure of the vehicle - Google Patents

Description

  The present invention relates to a rear body structure of a vehicle, and more particularly to a rear body structure of a vehicle including a rear side frame and a rear subframe.

  In vehicles such as automobiles, a rear subframe for supporting an engine, a transmission, etc. is disposed below the rear side frame extending in the longitudinal direction of the vehicle body at the rear of the vehicle body, and the rear subframe is connected to the rear side frame. Are known.

  For example, Patent Document 1 discloses a structure in which a rear subframe is disposed below a rear side frame at the rear part of a vehicle body, and the rear subframe is connected to the rear side frame. For example, in Patent Document 2, a rear subframe for mounting an engine and a rear subframe for mounting a transmission are disposed below the rear part of the vehicle body, and the rear subframe for mounting an engine is fixed to the vehicle body frame and the rear subframe for mounting a transmission. Is fixed to the engine-mounted rear subframe and the vehicle body frame.

JP 2016-43829 A Japanese Utility Model Publication No. 62-8880

  For vehicles such as automobiles, absorb the collision load to improve the safety of passengers in the passenger compartment and to suppress damage to the vehicle body when a collision load is applied from the rear of the vehicle during a rear collision (rear collision). Even in a vehicle in which a rear sub-frame is disposed below the rear side frame at the rear of the vehicle body, it is required to absorb a collision load at the time of a rear collision.

  On the other hand, a load absorbing portion such as a crash can that extends in the longitudinal direction of the vehicle body and absorbs a collision load is provided on the rear side of the rear side frame and rear subframe of the vehicle body at the rear portion of the vehicle body to absorb the collision load. It is known to absorb a collision load by buckling in the front-rear direction.

  In addition, a vehicle equipped with an engine is provided with a silencer that reduces noise when exhaust from the engine is released into the atmosphere as an exhaust system component, and the silencer is disposed at the rear of the vehicle body. Even in a vehicle such as an electric vehicle provided with a rear sub-frame below the rear side frame at the rear of the vehicle body and having a drive motor as a drive source for driving the vehicle and a battery for storing electric power supplied to the drive motor. When a generator that generates electric power for traveling, which is an important safety component, is provided and an engine is provided as a drive source for driving the generator, a silencer may be disposed at the rear of the vehicle body.

  Thus, in a vehicle having a rear side frame and a rear subframe and an exhaust system part of a drive source for driving the generator and the generator at the rear part of the vehicle body, the power generation in which the exhaust system part is an important safety part at the time of a rear collision In order to improve the safety of passengers in the passenger compartment, it is possible to prevent the interference between exhaust system parts and the generator at the time of a rear collision to protect the generator and absorb the collision load. Is desired.

  Accordingly, the present invention provides a vehicle that includes a rear side frame and a rear subframe and has a generator and an exhaust system component disposed at the rear of the vehicle body to prevent interference between the exhaust system component and the generator during a rear collision. It is an object of the present invention to provide a rear body structure of a vehicle capable of protecting a machine and absorbing a collision load.

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

  First, the invention according to claim 1 of the present application includes left and right rear side frames extending in the longitudinal direction of the vehicle body at a rear portion of the vehicle body, and a rear subframe disposed below the left and right rear side frames and extending in the longitudinal direction of the vehicle body. A rear body structure of the vehicle, wherein a power generator for generating electric power for running is provided at the rear of the vehicle body, and an exhaust system component of a drive source for driving the generator at a vehicle rear side from the generator. The sub-frame includes a load absorbing portion that extends to the rear side of the vehicle body from the generator and is provided on the rear side of the vehicle body from the generator to absorb a collision load when a collision load is applied from the rear of the vehicle body. Further, it is provided on the rear side of the vehicle body from the generator and on the front side of the vehicle body from the exhaust system parts, and extends inclined toward the lower side of the vehicle body toward the front side of the vehicle body. Wherein the guide portion for guiding the exhaust system component when the action of the collision load is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the rear sub frame includes the load absorbing portion on the rear side of the vehicle body, and extends upward in the vehicle body longitudinal direction along the rear side frame. A frame, and a lower frame that is disposed on the vehicle body lower side than the upper frame and extends in a substantially horizontal direction in the vehicle longitudinal direction and coupled to the vehicle body, and the guide portion is provided on the upper frame. It is connected with the front-end part of a load absorption part, and the rear-end part of the said lower frame.

  According to a third aspect of the present invention, in the second aspect of the present invention, the upper frame of the rear sub-frame includes the load absorbing portion on the rear side of the vehicle body and extends along the left and right rear side frames. The left and right upper frame portions extending in the longitudinal direction of the vehicle body, and the upper cross portion extending between the front end portions of the load absorbing portions provided in the left and right upper frame portions and extending in the vehicle width direction, and the guide portion. Is connected to the upper cross portion.

  The invention according to claim 4 is the invention according to claim 3, wherein the guide portion is coupled to the upper cross portion and extends from the upper cross portion toward the rear side of the vehicle body, and the upper cross portion. The portion extending further to the rear side of the vehicle body is supported by the upper cross portion in a cantilever state.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects of the present invention, the guide portion extends in a slanting manner toward the vehicle body lower side toward the vehicle body front side. A wall portion is provided, and a plurality of ridge lines extending in the vertical direction of the vehicle body are formed on the vertical wall portion.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the guide portion extends in a slanting manner toward the vehicle body lower side as it goes toward the vehicle body front side. A wall portion is provided, and the vertical wall portion extends from the generator to the vehicle body lower side so as to cover the generator from the vehicle body rear side.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the exhaust system component of the drive source is a silencer.

  According to the invention described in claim 1 of the present application, the rear side frame and the rear subframe are provided, the generator and the exhaust system parts are disposed at the rear of the vehicle body, and the rear subframe is disposed on the rear side of the vehicle body from the generator. In addition to extending, a load absorbing portion provided on the rear side of the vehicle body from the generator is provided. The rear sub-frame is provided with a guide portion that is provided on the rear side of the vehicle body from the generator and on the front side of the vehicle body from the exhaust system parts, and that extends obliquely toward the lower side of the vehicle body toward the front side of the vehicle body and guides the exhaust system parts. It is done.

  As a result, it is possible to absorb the collision load at the time of rear collision by the load absorbing portion of the rear side frame provided on the rear side of the vehicle body from the generator, and to generate power when the exhaust system parts are moved to the front side of the vehicle body at the time of rear collision. The exhaust system parts can be guided to the lower side of the vehicle body by the guide portion provided on the rear side of the vehicle body from the machine to prevent interference with the generator. Therefore, in a vehicle having a rear side frame and a rear subframe and having a generator and exhaust system parts disposed at the rear of the vehicle body, the generator is protected by preventing interference between the exhaust system parts and the generator at the time of a rear collision. At the same time, the collision load can be absorbed.

  According to the second aspect of the present invention, the rear subframe includes the upper frame and the lower frame, and the guide portion includes the front end portion of the load absorbing portion provided in the upper frame and the rear frame. By being connected to the end portion, it is possible to transmit the load input to the guide portion to the upper frame and the lower frame, and to transmit the load from the lower frame to the vehicle body side to disperse the effect. Can play.

  According to the invention described in claim 3, the upper frame is provided between the left and right upper frame portions extending in the longitudinal direction of the vehicle body and including the load absorbing portion on the rear side of the vehicle body and the front end portion of the load absorbing portion. An upper cross portion extending in the width direction, and the guide portion is coupled to the upper cross portion, whereby the rigidity of the guide portion can be increased and a load input to the guide portion at the time of a rear collision is transmitted from the upper cross portion. It can be transmitted and distributed to each part of the rear subframe.

  According to the fourth aspect of the present invention, the guide portion is coupled to the upper cross portion, extends from the upper cross portion to the vehicle body rear side, and a portion extending from the upper cross portion to the vehicle body rear side serves as the upper cross portion. By supporting the exhaust system parts in the cantilever state, the guide part is formed to extend to the rear side of the vehicle body to the vicinity of the exhaust system parts even when the exhaust system parts are arranged on the rear side of the vehicle body from the upper cross part. The collision load can be absorbed by the load absorbing portion at the time of a collision, and when the exhaust system component is moved to the front side of the vehicle body, the exhaust system component can be effectively guided to the vehicle body lower side by the guide portion.

  According to the fifth aspect of the present invention, the guide portion includes the vertical wall portion that extends obliquely toward the vehicle body lower side toward the vehicle body front side, and a plurality of ridge lines extending in the vehicle body vertical direction are formed on the vertical wall portion. By doing so, the bending rigidity of a guide part can be improved with a ridgeline, and the said effect can be acquired effectively.

  According to the sixth aspect of the present invention, the guide portion includes the vertical wall portion that extends obliquely toward the vehicle body lower side toward the vehicle body front side, and the vertical wall portion covers the generator from the vehicle body rear side. Thus, since the barrier can be provided on the vehicle body rear side of the generator by the vertical wall portion by extending from the generator to the vehicle body lower side, it is possible to prevent the generator from being damaged from the vehicle body rear side at the time of a rear collision. Can do.

  According to the seventh aspect of the present invention, the exhaust system component of the drive source is a silencer, so that a silencer is disposed on the rear side of the vehicle body from the generator that generates power for running at the rear of the vehicle body. In such a vehicle, the effect can be effectively obtained.

1 is a bottom view of a vehicle body to which a rear vehicle body structure according to an embodiment of the present invention is applied. 1 is a side view of a vehicle body to which a rear vehicle body structure according to an embodiment of the present invention is applied. FIG. 2 is a bottom view of the vehicle body shown in FIG. 1 with a subframe unit and a battery frame removed. FIG. 2 is a bottom view of the vehicle body shown in FIG. 1 with a part of a subframe unit removed. FIG. 4 is a cross-sectional view of the vehicle body taken along line Y5-Y5 in FIG. It is sectional drawing of the vehicle body along the Y6-Y6 line in FIG. It is a perspective view of a sub-frame unit. It is a perspective view of the sub-frame unit which removed the auxiliary machine. It is a side view of the sub-frame unit shown in FIG. It is a bottom view of the sub-frame unit shown in FIG. It is a perspective view which shows the frame connection connection part which connects a rear sub-frame and a rear side frame. It is a perspective view which shows the branch frame member of a sub-frame unit. It is a perspective view which shows the frame connection part which connects a rear sub-frame and a battery frame. It is another perspective view which shows the frame connection part which connects a rear sub-frame and a battery frame. It is a perspective view which shows the lower frame member of a sub-frame unit. It is sectional drawing of the rear sub-frame unit along the Y16-Y16 line | wire in FIG. It is explanatory drawing for demonstrating attachment of the auxiliary machine to a rear sub-frame. It is explanatory drawing for demonstrating the rear side support hanger which supports a silencer. It is explanatory drawing for demonstrating the movement of the silencer at the time of a rear collision.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is a bottom view of a vehicle body to which a vehicle rear body structure according to an embodiment of the present invention is applied. FIG. 2 is a side view of a vehicle body to which the vehicle rear body structure according to the embodiment of the present invention is applied. 1 is a bottom view of the vehicle body shown in FIG. 1 with the subframe unit and the battery frame removed, FIG. 4 is a bottom view of the vehicle body shown in FIG. 1 with a part of the subframe unit removed, and FIG. FIG. 6 is a cross-sectional view of the vehicle body taken along line Y6-Y6 in FIG.

  A vehicle body 1 to which a rear body structure of a vehicle according to an embodiment of the present invention is applied includes a drive motor as a drive source that drives the vehicle, and a vehicle body such as an electric vehicle that includes a battery that stores electric power supplied to the drive motor. The vehicle body 1 is provided with a range extender device that includes a generator for generating electric power for running supplied to the battery and an engine as a drive source for driving the generator, and generates electric power with the engine to improve the cruising distance. ing. In the vehicle body 1, a drive motor is disposed at the front of the vehicle body, a battery is disposed below the passenger compartment floor, and a range extender device is disposed at the rear of the vehicle body.

  As shown in FIGS. 1 to 6, the vehicle body 1 includes a pair of left and right rear side frames 2 extending in the vehicle body front-rear direction and a vehicle body front-rear direction along the left and right rear side frames 2 below the left and right rear side frames 2. And a rear sub-frame 50 extending in the direction. The rear side frame 2 and the rear sub frame 50 are formed of a plate-like member using a metal material.

  The rear part of the vehicle body also includes a rear floor part 3 comprising a rear floor panel that extends from the left and right rear side frames 2 and extends in the longitudinal direction of the vehicle body, and a first part that is provided between the left and right rear side frames 2 on the lower surface side of the rear floor part 3. A cross member 4 is provided.

  The rear floor 3 has an opening 3a for arranging a generator 41 that generates electric power for running supplied to the battery 20 and a range extender device 40 that is integrally assembled with an engine 42 that drives the generator 41. The first cross member 4 is formed on the front side of the vehicle body of the opening 3a.

  The rear side frame 2 is formed in a substantially U-shaped cross section, is attached to the lower surface side of the rear floor portion 3, and is formed in a closed cross-sectional shape in a substantially rectangular shape that extends in the longitudinal direction of the vehicle body in cooperation with the rear floor portion 3. ing. The first cross member 4 is formed in a substantially hat shape in cross section, is attached to the lower surface side of the rear floor portion 3, and is formed in a closed cross section shape in a substantially square shape in cross section extending in the vehicle width direction in cooperation with the rear floor portion 3. Has been.

  On the vehicle body rear side of the left and right rear side frames 2, as load absorbing portions that are respectively attached to both ends of a side frame side bumper rain 5 disposed in a rear bumper (not shown) extending in the vehicle width direction and extend in the vehicle body longitudinal direction. A crash can 6 is provided.

  As shown in FIG. 5, the crash can 6 has a substantially polygonal cross section, more specifically a substantially cross-shaped cross section, in a cross section substantially orthogonal to the axial direction that is the longitudinal direction of the vehicle body. And has a plurality of recesses 6b extending in a direction substantially orthogonal to the axial direction, and is deformed so as to be folded when a collision load is applied from the rear of the vehicle body to absorb the collision load. It is like that.

  The crash can 6 is integrally formed in a closed cross-sectional shape, but has a first plate-like member formed to protrude in a convex shape on the outer side in the vehicle width direction and a convex shape in the inner side in the vehicle width direction. It is also possible to join a second plate-like member formed so as to protrude into the shape of a cross and have a substantially cross shape.

  As shown in FIG. 2, the crash can 6 is fixed to the crash can 6 by welding or the like and extends in a direction substantially perpendicular to the longitudinal direction of the vehicle body, and is fixed to the rear side frame 2 by welding or the like. A second plate member 8 extending in a direction substantially orthogonal to the front-rear direction is coupled to the rear side frame 2 by fastening with bolts and nuts.

  In the vehicle body 1, the rear side frame 2 is formed in a closed cross section in cooperation with the rear floor portion 3, but the rear side frame 2 may be formed in a closed cross section in a substantially square cross section. Further, the crash can 6 is provided on the rear side of the rear side frame 2 via the first plate member 7 and the second plate member 8, but the crash can 6 is integrally formed on the rear side frame 2. Also good.

  In the vehicle body 1, the load absorbing portion of the rear side frame 2 is set to have a lower strength against compression in the axial direction than the other portions of the rear side frame 2 by the crash can 6, but the load absorbing portion 6 of the rear side frame 2 is formed. It is also possible to set the steel plate to be thin to have a low strength against axial compression.

  The front end portion of the rear side frame 2 is overlapped and joined to the rear end portion of the kick-up frame 9 that is inclined to the vehicle width direction outer side and the vehicle body lower side toward the vehicle body front side, and the front end portion of the kick-up frame 9 is The second cross member 12 extends between the left and right side sills 11 and extends in the vehicle width direction. The left and right side sills 11 are disposed so as to extend in the vehicle body front-rear direction on both sides in the vehicle width direction of the vehicle compartment floor portion 10 formed of a front floor panel that forms the floor surface of the vehicle compartment.

  The left and right kick-up frames 9 are provided with kick-up portions 13 each including a kick-up panel extending obliquely upward from the rear side of the vehicle compartment floor portion 10 toward the vehicle body rear side. A rear floor portion 3 is provided so as to extend from the rear side to the vehicle body rear side.

  The kick-up frame 9 is formed in a substantially hat-shaped cross section and is attached to the lower surface side of the kick-up portion 13, and is formed in a closed cross-sectional shape in a substantially quadrangular cross-section extending in the vehicle longitudinal direction in cooperation with the kick-up portion 13. ing. The second cross member 12 is formed in a substantially hat shape in cross section, is attached to the lower surface side of the passenger compartment floor portion 10, and has a closed cross sectional shape in a substantially rectangular cross section extending in the vehicle width direction in cooperation with the passenger compartment floor portion 10. Is formed.

  As shown in FIG. 3, a floor tunnel portion 14 that extends in the vehicle longitudinal direction and bulges upward in the vehicle body is formed in the passenger compartment floor portion 10, and the floor tunnel portion 14 and the left and right side sills are formed. A floor frame 15 extending in the longitudinal direction of the vehicle body is attached to a substantially center between the tunnel tunnel 16 and a tunnel rain 16 is attached to both sides of the floor tunnel portion 14 in the vehicle width direction. The floor frame 15 and the tunnel rain 16 are formed in a substantially hat shape in cross section and joined to the passenger compartment floor portion 10.

  In the vehicle body 1, a battery 20 is disposed below the passenger compartment floor 10. As shown in FIG. 6, the battery 20 is attached to a battery frame 30 that supports the battery 20 in a state of being attached to the battery tray 21, and the battery frame 30 is connected to the vehicle compartment floor portion 10 to connect to the vehicle body 1. It is supported.

  The battery frame 30 includes a front frame (not shown) that is disposed on the front side of the vehicle body and extends in the vehicle width direction, a rear frame 31 that is disposed on the rear side of the vehicle body and extends in the vehicle width direction, and both sides of the front frame in the vehicle width direction. Both side frames 32 are connected to both sides of the rear frame 31 in the vehicle width direction and extend in the longitudinal direction of the vehicle body. The side frames 32 on both sides are disposed on the vehicle body lower side of the left and right floor frames 15. Attached to the floor frame 15.

  As shown in FIG. 6, the front frame, the rear frame 31, and the side frames 32 on both sides are respectively an upper frame 33 having a substantially L-shaped cross section constituting the upper side of the battery frame 30 and the lower side of the battery frame 30. The upper frame 33 and the lower frame 34 are joined together to form a closed cross-section with a substantially quadrangular cross-section. The battery frame 30 includes a flange portion 30 a that extends substantially inward in the vehicle width direction. The battery tray 21 is attached to the flange portion 30 a, and the battery 20 is supported by the battery frame 30.

  The battery frame 30, specifically, the side frame 32, is disposed substantially along the floor frame 15 and connected to the floor frame 15. As shown in FIG. 6, in the frame connecting portion 35 that connects the battery frame 30 and the floor frame 15, the upper surface portion 30 b of the battery frame 30 is overlapped with the bottom surface portion 15 a of the floor frame 15, and bolts B <b> 1 and nuts N <b> 1 are used. Are connected. A plurality of frame connecting portions 35 are provided in the vehicle body longitudinal direction of the side frame 32.

  In the vehicle body 1, a range extender device 40 including a generator 41 and an engine 42 is disposed at the rear of the vehicle body. The range extender device 40 is an auxiliary machine that is an important safety part because the generator 41 uses a high voltage. The range extender device 40 is disposed in the opening 3a of the rear floor portion 3, and is located above and below the vehicle body from the rear floor portion 3. It is provided so as to protrude to the side.

  A catalyst device 45 provided with a silencer 44 for reducing noise when exhaust of the engine 42 is discharged to the atmosphere as an exhaust system component and a catalyst for purifying exhaust of the engine 42 is also provided at the rear of the vehicle body in an exhaust pipe 43 extending from the engine 42. Is arranged. The silencer 44 and the catalyst device 45 are auxiliary devices that are not important safety parts, and are arranged to extend in the vehicle width direction on the vehicle body lower side of the rear floor portion 3, and the catalyst device 45 is disposed on the vehicle body rear side of the range extender device 40. The silencer 44 is arranged on the vehicle body rear side of the catalyst device 45. The silencer 44 and the catalyst device 45 are integrally connected by a connection member 46.

  The auxiliary machine, specifically, the range extender device 40, the silencer 44, and the catalyst device 45 disposed at the rear of the vehicle body are integrally assembled with the rear subframe 50 to form a subframe unit 60 that is an integral unit. The unit 60 is assembled to the vehicle body 1 as a whole. As described above, the auxiliary units 40, 44, 45 and the rear sub-frame 50 arranged at the rear of the vehicle body are integrated into the unit 60, so that the vehicle can be easily assembled to the vehicle body 1, and productivity and safety at the time of vehicle body manufacturing can be improved. It is possible to improve the performance.

  The rear portion of the vehicle body also includes a pair of left and right trailing arms (not shown) extending in the longitudinal direction of the vehicle body, and a torsion beam 17 (see the broken line in FIG. 2) extending in the vehicle width direction by connecting the pair of left and right trailing arms. A torsion beam suspension device is provided. In the vehicle body 1, the torsion beam 17 is provided on the vehicle body front side of the range extender device 40, on the vehicle body rear side of the battery frame 30, and on the vehicle body upper side of the lower frame member 71 of the rear subframe 50 described later.

  7 is a perspective view of the sub-frame unit, FIG. 8 is a perspective view of the sub-frame unit with the auxiliary machine removed, FIG. 9 is a side view of the sub-frame unit shown in FIG. 8, and FIG. 10 is shown in FIG. It is a bottom view of a sub-frame unit. As shown in FIGS. 7 to 10, the subframe unit 60 is configured by integrally assembling a range extender device 40, a silencer 44, and a catalyst device 45 on the rear subframe 50.

  The rear subframe 50 includes an upper frame member 51 extending in the longitudinal direction of the vehicle body along the rear side frame 2, and coupled to the upper frame member 51 from the center side of the upper frame member 51 in the longitudinal direction of the vehicle body toward the front side of the vehicle body and the lower side of the vehicle body. A branch frame member 61 that branches so as to extend is provided, and a lower frame member 71 that is disposed on the vehicle body lower side than the upper frame member 51 and extends substantially horizontally from the branch frame member 61 to the vehicle body front side.

  The rear subframe 50 is also connected to a subframe-side bumper rain 18 disposed in a rear bumper (not shown) extending in the vehicle width direction, and the vehicle body rear side of the left and right upper frame members 51 is at both ends of the subframe-side bumper rain 18. Respectively. The rear subframe 50 is formed symmetrically in the vehicle width direction.

  The upper frame member 51 connects the left and right upper frame portions 52 that extend in the vehicle longitudinal direction along the left and right rear side frames 2 and the vehicle width direction center side of the left and right upper frame portions 52 that extend in the vehicle width direction. And an upper cross portion 53.

  The upper frame portion 52 is formed in a closed cross-sectional shape, extends from the range extender device 40 to the vehicle body rear side, and absorbs the collision load when the collision load from the vehicle body rearward is applied to the vehicle body rear side from the range extender device 40. 54.

  As shown in FIG. 8, the load absorbing portion 54 includes a front load absorbing portion 54a disposed on the front side of the vehicle body and a rear load absorbing portion 54b disposed on the rear side of the vehicle body from the front load absorbing portion 54a. The front load absorbing portion 54a and the rear load absorbing portion 54b are formed in the same closed cross section in an orthogonal cross section that is substantially orthogonal to the longitudinal direction of the vehicle body, and the closed cross section formed in a substantially cross shape in the same manner as the crash can 6 have. The rear load absorbing portion 54b is formed with a thinner steel plate than the front load absorbing portion 54a and has a low strength against axial compression.

  The front load absorbing portion 54a and the rear load absorbing portion 54b are not limited to this, respectively, but the first plate-like member and the vehicle width formed to protrude in a convex cross section outward in the vehicle width direction. A second plate-like member formed so as to project in a convex shape in cross section on the inner side in the direction is joined to form a substantially cross-shaped cross section.

  In the vehicle body 1, the silencer 44 and the catalyst device 45 are positioned so as to overlap the load absorbing portion 54, specifically, the front load absorbing portion 54 a in the longitudinal direction of the vehicle body on the front side of the load absorbing portion 54 of the rear subframe 50. Is provided.

  The upper frame portion 52 also includes a front frame portion 55 on the front side of the vehicle body with respect to the load absorbing portion 54. The front frame portion 55 is formed in a closed hexagonal shape with a substantially hexagonal cross section on the rear side of the vehicle body, and a substantially square cross section on the front side of the vehicle body. It has a closed cross-sectional shape.

  As shown in FIG. 4, the front frame portion 55 extends outward in the vehicle width direction toward the vehicle body front side, and is connected to the vehicle body front side of the rear side frame 2 using bolts and nuts. The front frame portion 55 is formed with a thicker steel plate than the front load absorbing portion 54a and the rear load absorbing portion 54b, and has a high strength against axial compression.

  As shown in FIG. 2, the side frame side load absorbing portion 6 provided in the rear side frame 2 and the sub frame side load absorbing portion 54 provided in the rear sub frame 50 are arranged after the sub frame side load absorbing portion 54. The end portion is disposed on the vehicle body front side from the rear end portion of the side frame side load absorbing portion 6, and the front end portion of the sub frame side load absorbing portion 54 is disposed on the vehicle body front side from the front end portion of the side frame side load absorbing portion 6. It is provided to be.

  The upper frame portion 52 is also provided with a plurality of frame connecting portions 56 that connect the rear sub-frame 50 and the rear side frame 2, and the plurality of frame connecting portions 56 are provided apart from each other in the longitudinal direction of the vehicle body. In the vehicle body 1, a front frame connecting portion 56 a and a rear frame connecting portion 56 b that connect the load absorbing portion 54 of the rear subframe 50 and the rear side frame 2 are provided.

  FIG. 11 is a perspective view showing a frame connecting member that connects the rear subframe and the rear side frame, and shows a frame connecting member 80 that constitutes the rear frame connecting portion 56b. In the rear frame connecting portion 56 b, the rear subframe 50 and the rear side frame 2 disposed close to the rear subframe 50 are connected by a frame connecting member 80.

  As shown in FIG. 11, the frame connecting member 80 has an approximately U-shaped upper frame 81 that forms the upper side of the vehicle body of the frame connecting member 80 and a substantially U-shaped cross-section that forms the lower side of the vehicle body of the frame connecting member 80. A peripheral wall 83 joined to the lower frame 82 and formed in a closed cross-sectional shape with a substantially square cross section in an orthogonal cross section orthogonal to the vehicle width direction, and a load transmission portion disposed in the peripheral wall 83 and extending in the longitudinal direction of the vehicle body 84.

  The peripheral wall portion 83 is formed in a closed cross section with an upper surface portion 83a, a lower surface portion 83b, and side surface portions 83c on both sides in the vehicle body front-rear direction. The load transmitting portion 84 is a closed cross-sectional portion 84a formed in a substantially cross-shaped cross section by joining a first plate-like member 85 formed in a convex cross section and a second plate member 86 formed in a cross-sectional convex shape. have.

  In the load transmitting portion 84, the closed cross-sectional portion of the front load absorbing portion 54a of the rear subframe 50 and the closed cross-sectional portion of the rear load absorbing portion 54b and the closed cross-sectional portion 84a are formed in the same shape. The load transmitting portion 84 is in a state where the side surface portions 85a on both sides of the first plate-like member 85 and the side surface portions 86a on both sides of the second plate-like member 86 are joined, and the load transmitting portion 84 on the vehicle body front side of the peripheral wall portion 83. The vehicle body front side is abutted and joined, and the vehicle body rear side of the load transmitting portion 84 is abutted and joined to the vehicle body rear side of the peripheral wall 83.

  Bolt insertion holes 83d are formed in the upper surface portion 83a and the lower surface portion 83b on the outer side in the vehicle width direction of the frame connecting member 80. The bolts B2 are inserted into the substantially cylindrical shape corresponding to the bolt insertion holes 83d. A cylindrical member 87 is fixed to the upper surface portion 83a.

  The frame connecting member 80 includes a front load absorbing portion 54a such that the closed cross section 84a of the load transmitting portion 84 matches the closed cross section of the front load absorbing portion 54a and the closed cross sectional portion of the rear load absorbing portion 54b in the vehicle longitudinal direction. Between the front load absorbing portion 54b and the rear load absorbing portion 54b. The front load absorbing portion 54b and the rear load absorbing portion 54b are joined and connected to each other.

  As shown in FIG. 3, the frame connecting member 80 also has a bolt insertion hole 2b provided in the lower surface portion 2a of the rear side frame 2 and a bolt insertion hole 83d provided in the upper surface portion 83a of the frame connecting member 80 so as to correspond to the rear side. In a state of being arranged on the vehicle body lower side of the frame 2, the bolt B <b> 2 is screwed to a nut (not shown) welded to the vehicle body upper side of the lower surface portion 2 a of the rear side frame 2 and connected to the rear side frame 2.

  Also for the front frame connecting portion 56a, the rear subframe 50 and the rear side frame 2 are connected by the frame connecting member 80, and the frame connecting member 80 is connected to the peripheral wall portion 83 formed in the same manner as the rear frame connecting portion 56b. Part 84, a bolt insertion hole 83d is formed on the outer side of the frame connecting member 80 in the vehicle width direction, and a cylindrical member 87 is fixed to the upper surface part 83a.

  In the front frame connecting portion 56a, the frame connecting member 80 includes the front load absorbing portion 54a and the front frame portion so that the closed cross section 84a of the load transmitting portion 84 coincides with the closed cross section of the front load absorbing portion 54a in the vehicle longitudinal direction. The front load absorbing portion 54a and the front frame portion 55 are joined and connected to each other.

  As for the frame connecting member 80 of the front frame connecting portion 56a, the bolt insertion hole 83b provided in the upper surface portion 83a of the frame connecting member 80 is made to correspond to the bolt insertion hole 2b provided in the lower surface portion 2a of the rear side frame 2. In a state of being arranged on the vehicle body lower side of the frame 2, the bolt B <b> 2 is screwed to a nut welded to the vehicle body upper side of the lower surface portion 2 a of the rear side frame 2 and connected to the rear side frame 2.

  The left and right frame connecting members 80 constituting the front frame connecting portion 56a are connected by a sub-cross member 90 that is formed in a closed cross section and extends in the vehicle width direction. The outer side in the vehicle width direction of the sub-cross member 90 is joined to the peripheral wall portion 83 of the left and right frame connecting members 80 to form the upper cross portion 53. The sub-cross member 90 is also provided with an inclined surface 90a that inclines toward the vehicle body lower side toward the vehicle body front side toward the vehicle width direction center side, and a guide panel described later is attached to the inclined surface 90a.

  FIG. 12 is a perspective view showing a branch frame member of the subframe unit. As shown in FIG. 12, the branch frame member 61 is disposed on the rear side of the vehicle body, and extends rearwardly extending toward the vehicle body front side, and is disposed on the vehicle body front side. A front surface portion 63 that extends in a substantially vertical direction, a bottom surface portion 64 that is disposed on the vehicle body lower side and extends in a substantially horizontal direction in the vehicle body front-rear direction, a rear surface portion 62, a front surface portion 63, and a bottom surface portion 64 Side portions 65 on both sides are provided that are connected to the outer end portions and spaced apart in the vehicle width direction in a direction substantially orthogonal to the vehicle width direction.

  The side surface portion 65 of the branch frame member 61 is formed in a substantially right trapezoidal shape in which the upper side of the vehicle body is longer in the front-rear direction of the vehicle body than the lower side of the vehicle body, and the side surface portion 65 is formed with a substantially inverted triangular opening 65a. The branch frame member 61 is connected to the upper frame member 51 by joining a flange portion 66 provided on the side surface portions 65 on both sides and extending to the upper side of the vehicle body to the upper frame member 51.

  13 is a perspective view showing a frame connecting portion that connects the rear subframe and the battery frame, FIG. 14 is another perspective view showing a frame connecting portion that connects the rear subframe and the battery frame, and FIG. It is a perspective view which shows the lower frame member of a sub-frame unit.

  As shown in FIGS. 13 to 15, in the frame connecting portion 70 that connects the rear sub frame 50 and the battery frame 30, the lower frame member 71 of the rear sub frame 50 and the battery frame 30 are connected. The lower frame member 71 includes an upper frame 72 having a substantially U-shaped cross section that forms the upper side of the vehicle body of the lower frame member 71, and a lower frame 73 having a substantially U-shaped cross section that forms the lower side of the vehicle body of the lower frame member 71. Are closed, and a closed cross-sectional portion 74 formed in a closed cross-sectional shape in an orthogonal cross-section orthogonal to the longitudinal direction of the vehicle body is provided.

  The lower frame member 71 is linearly provided in the vehicle width direction on the inner side in the vehicle width direction and extends inclined toward the vehicle width direction outer side as the vehicle width direction outer side moves toward the vehicle body front side. It is formed in a substantially right triangle shape having a width in the vehicle width direction larger on the front side of the vehicle body than on the rear side of the vehicle body.

  In the lower frame member 71, as shown in FIG. 15, a ridge line extending in the longitudinal direction of the vehicle body is formed on the inner side of the closed cross section 74 on the center side in the vehicle width direction on the front side of the vehicle body. A first recess 75 that is recessed in a substantially square frustum shape is formed, and a ridge line extending in the vehicle longitudinal direction is formed on the lower surface portion 71b on the inner side of the closed cross-sectional portion 74 on the vehicle width direction center side on the vehicle body front side. A second recess 76 is formed in the shape of a substantially quadrangular prism.

  The lower frame member 71 also has a lower frame 73 extending from the upper frame 72 to the vehicle body front side and the vehicle body rear side, and the lower frame 73 extending from the upper frame 72 to the vehicle body front side and the vehicle body rear side, respectively. A rearward extending portion 73b is provided.

  In the frame connecting portion 70, the lower frame member 71 is arranged such that the front side of the vehicle body of the closed section 74 faces the battery frame 30, and the front extending portion 73 a is overlapped with the bottom surface portion 30 c of the battery frame 30. In this state, the bolt B3 is screwed into a nut (not shown) fixed to the upper surface side of the bottom surface portion 30c of the battery frame 30, and is connected to the battery frame 30. A lower frame of the rear frame 31 extends so as to cover the side frame 32 on the vehicle body rear side of the side frame 32 of the battery frame 30.

  As shown in FIGS. 1 and 13, the side frame 32 of the battery frame 30 is offset from the rear subframe 50 in the vehicle longitudinal direction center side and from the rear subframe 50 to the vehicle width direction outward side in the vehicle longitudinal direction. More specifically, the center line C2 of the side frame 32 is offset from the vehicle width direction center line C1 of the rear sub frame 50 to the vehicle width direction outer side and extends in the vehicle body front-rear direction.

  The lower frame member 71 is inclined and extended outward in the vehicle width direction toward the front of the vehicle body, and is offset to the side frame 32 that is offset from the rear subframe 50 outward in the vehicle width direction and extends in the vehicle body front-rear direction. An opposing inclined portion 77, and a rear portion that is widened inward in the vehicle width direction from the inclined portion 77 to a position extending linearly in the longitudinal direction of the vehicle body and extends inward in the vehicle width direction from the rear end portion of the side frame 32 A widened portion 78 facing the frame 31 is provided.

  The inclined portion 77 of the lower frame member 71 is formed by a portion on the outer side in the vehicle width direction of the lower frame member 71, and the widened portion 78 is an inner side in the vehicle width direction on the vehicle body front side of the lower frame member 71. It is formed by the part. In addition, the vehicle body rear side of the lower frame member 71 is formed to have substantially the same width in the vehicle width direction as the upper frame member 51 and the branch frame member 61.

  The lower frame member 71 is also arranged such that the rear side of the vehicle body of the closed cross-section portion 74 faces the front surface portion 63 of the branch frame member 61 and the rear extension portion 73 b is overlapped with the bottom surface portion 64 of the branch frame member 61. In this state, the bolt B4 is screwed into a nut (not shown) fixed to the upper surface side of the bottom surface portion 64 of the branch frame member 61 and connected to the branch frame member 61.

  FIG. 16 is a cross-sectional view of the rear subframe unit along line Y16-Y16 in FIG. As shown in FIG. 16, the rear subframe 50 extends to the rear side of the vehicle body from the range extender device 40, to the front side of the vehicle body from the silencer 44 and the catalyst device 45, and to the lower side of the vehicle body toward the front side of the vehicle body. A guide portion 91 including a guide panel for guiding the silencer 44 when a collision load is applied from the rear of the vehicle body is provided.

  The guide portion 91 includes a vertical wall portion 92 that extends obliquely toward the vehicle body lower side toward the vehicle body front side, and extends from the range extender device 40 to the vehicle body lower side so as to cover the range extender device 40 from the vehicle body rear side. . The guide portion 91 is also provided with a plurality of, specifically, three concave portions 92a extending in the vertical direction of the vehicle body and recessed in the vehicle body front side in the vertical wall portion 92, and spaced apart in the vehicle width direction. A plurality of ridge lines extending in the direction are formed.

  As shown in FIG. 8, mounting brackets 93 having a substantially hat-shaped cross section are attached to both sides of the guide portion 91 on the vehicle body front side so as to cover the vehicle body front side of the recess 92a. As shown, the mounting bracket 93 is attached to the inclined surface 90 a of the sub-cross member 90 using bolts and nuts, and the guide portion 91 is coupled to the upper cross portion 53. The guide portion 91 extends to the vehicle body rear side from the upper cross portion 53, and a portion 91 a extending from the upper cross portion 53 to the vehicle body rear side is supported by the upper cross portion 53 in a cantilever state.

  The guide portion 91 also includes a bottom surface portion 94 extending from the vehicle body lower side of the vertical wall portion 92 to the vehicle body front side, and flange portions 94a provided on both sides of the bottom surface portion 94 in the vehicle width direction are bottom surface portions 64 of the branch frame member 61. The flange portion 92b is connected to the rear frame portion 61 of the lower frame member 71 together with the rearwardly extending portion 73b using bolts and nuts. It is connected to 62 using bolts and nuts.

  The guide portion 91 is connected to the front end portion of the load absorbing portion 54 provided in the upper frame member 51 via the upper cross portion 53, and extends backward from the bottom surface portion 64 of the branch frame member 61 and the lower frame member 71. It connects with the installation part 73b. It is also possible to use the bottom surface portion 94 of the guide portion 91 as a jack abutting portion that abuts the garage jack, for example, during maintenance work.

  FIG. 17 is an explanatory diagram for explaining the attachment of the auxiliary machine to the rear sub-frame, and shows parts related to the attachment of the auxiliary machine. In the drawings excluding FIGS. 17 to 19, the structure for attaching the auxiliary machine to the rear sub-frame is omitted. As shown in FIG. 17, the range extender device 40 is attached to the upper frame member 51 of the rear sub-frame 50 through elastic members by left and right side support portions 40a provided on both sides in the vehicle width direction, The rear support part 40b provided on the side is attached to the sub-cross member 90 via an elastic member.

  The silencer 44 and the catalyst device 45 are attached to the rear subframe 50 by a front support hanger 100 that supports the silencer 44 and a rear support hanger 110 that is disposed on the rear side of the vehicle body from the front support hanger 100 and supports the silencer 44. ing.

  The front support hanger 100 is provided on both sides of the exhaust pipe 43 upstream of the silencer 44 in the vehicle width direction, and is fixed to the exhaust pipe 43 on which the silencer 44 is disposed, and the silencer side rod 101 whose front end extends in the vehicle width direction. And the sub-frame side rod 102 fixed to the frame connecting member 80 of the rear frame connecting portion 56b in the rear sub-frame 50 and extending in the vehicle width direction, the silencer-side rod 101, and the sub-frame side rod 102 are inserted. And a rubber member 103 as an elastic body.

  The rubber member 103 is formed in an approximately elliptical plate shape from an elastic material such as rubber. The rubber member 103 is provided with insertion holes 103a and 103b that extend in the axial direction of the rubber member 103 and through which the silencer side rod 101 and the subframe side rod 102 are inserted, respectively. The rubber member 103 of the front support hanger 100 is provided with two insertion holes 103a and 103b extending in the vehicle width direction so as to be separated from each other in the vehicle longitudinal direction.

  The silencer-side rod 101 is provided with a silencer-side insertion portion 101a that extends in the vehicle width direction at the tip portion and is inserted into the insertion hole 103a of the rubber member 103. The sub-frame side rod 102 is provided with a sub-frame side insertion portion 102 a that extends in the vehicle width direction at the tip portion and is inserted into the insertion hole 103 b of the rubber member 103.

  In the front support hanger 100, the silencer side insertion portion 101 a of the silencer side rod 101 and the subframe side insertion portion 102 a of the subframe side rod 102 are inserted into the insertion holes 103 a and 103 b of the rubber member 103, respectively, and the elastic body 103 is interposed therebetween. Thus, the silencer 44 is supported on the rear sub-frame 50.

  FIG. 18 is an explanatory diagram for explaining the rear support hanger that supports the silencer, and schematically shows a portion related to the rear support hanger. As shown in FIGS. 17 and 18, the rear support hanger 110 is provided on both sides in the vehicle width direction on the rear side of the silencer 44 and fixed to the silencer 44, and the silencer side rod 111 extending at the front end in the vehicle longitudinal direction. And a sub-frame side rod 112 that is fixed to the sub-frame side bumper rain 18 of the rear sub-frame 50 and whose front end extends in the longitudinal direction of the vehicle body, and an elastic body through which the silencer-side rod 111 and the sub-frame side rod 112 are inserted. And a rubber member 113.

  The rubber member 113 is formed in an approximately elliptical plate shape from an elastic material such as rubber. The rubber member 113 is provided with insertion holes 113a and 113b extending in the axial direction of the rubber member 113 and through which the silencer side rod 111 and the subframe side rod 112 are inserted. The rubber member 113 of the rear support hanger 110 is provided with two insertion holes 113a and 113b extending in the vehicle front-rear direction so as to be separated from each other in the vehicle vertical direction and the vehicle width direction.

  The silencer-side rod 111 is provided with a silencer-side insertion portion 111a that extends in the front-rear direction of the vehicle body and is inserted into the insertion hole 113a of the rubber member 113 at the front end portion, and the front side of the vehicle body that is the silencer side of the silencer-side insertion portion 111a. An elastic body movement restricting portion 111b that bends and restricts the rubber member 113 from moving toward the front of the vehicle body from the silencer side insertion portion 111a is provided on the front side of the silencer side insertion portion 111a.

  The sub-frame side rod 112 is provided with a sub-frame side insertion portion 112a that extends in the front-rear direction of the vehicle body and is inserted into the insertion hole 113b of the rubber member 113 at the front end, and the rear sub-frame side of the sub-frame side insertion portion 112a. The sub-frame side insertion allowing portion 112b that allows the rear side of the vehicle body to extend straight a predetermined distance in the longitudinal direction of the vehicle body and pass through the insertion hole 113b of the rubber member 113 is provided.

  The subframe side rod 112 is also bent at the rear side of the vehicle body, which is the rear subframe side of the subframe side insertion allowing portion 112b, and is allowed to be inserted into the rubber member 113 on the rear side of the subframe side insertion allowing portion 112b. An elastic body insertion restricting portion 112c that restricts insertion of the rear side of the vehicle body from the portion 112b is provided.

  In the rear support hanger 110, the silencer side insertion portion 111 a of the silencer side rod 111 and the subframe side insertion portion 112 a of the subframe side rod 112 are inserted into the insertion holes 113 a and 113 b of the rubber member 113, respectively. The silencer 44 is supported by the rear sub-frame 50 via the gap.

  FIG. 19 is an explanatory diagram for explaining the movement of the silencer at the time of a rear collision. As shown in FIG. 19A, when a collision load is applied from the rear of the vehicle body at the time of rear collision of the vehicle body 1, the rear portion of the vehicle body is deformed and the collision load is input to the rear side frame 2 and also to the rear subframe 50. The collision load is input.

  When a collision load is input to the rear subframe 50, as shown in FIG. 19B, the subframe-side bumper rain 18 of the rear subframe 50 is moved to the front side of the vehicle body, and the rear side of the rear subframe 50 is moved. The load absorbing portion 54b buckles and deforms in the longitudinal direction of the vehicle body to absorb the collision load.

  When the sub-frame side bumper rain 18 of the rear sub-frame 50 is moved to the front side of the vehicle body, the sub-frame side insertion allowing portion 112b provided on the sub-frame side rod 112 of the rear support hanger 110 moves to the front side of the vehicle body. The rear load absorbing part 54b of the rear subframe 50 absorbs the collision load without moving the silencer side rod 111 of the rear support hanger 110 through the insertion hole 113b of the rubber member 113.

  As shown in FIG. 19C, when the sub-frame-side bumper rain 18 of the rear sub-frame 50 is further moved to the front side of the vehicle body, the front load absorbing portion 54a of the rear sub-frame 50 is buckled and deformed in the vehicle front-rear direction. While absorbing the collision load, the silencer 44 and the catalyst device 45 are moved to the front side of the vehicle body. However, the silencer 44 and the catalyst device 45 are moved to the vehicle body lower side along the guide portion 91 toward the vehicle body front side. The

  When the subframe-side bumper rain 18 is further moved to the front side of the vehicle body, the subframe-side rod 112 is inserted into the rubber member 113 by the elastic body insertion restricting portion 112c provided on the subframe-side rod 112 of the rear support hanger 110. The rubber member 113 is restricted from moving forward by the elastic body movement restricting portion 111b provided on the silencer side rod 111 of the rear support hanger 110, and the silencer 44 and the catalyst device 45 are restricted. Is moved to the vehicle body lower side along the guide portion 91 toward the vehicle body front side, and the silencer side rod 111 of the rear support hanger 110 is detached from the rubber member 113.

  In the vehicle body 1 configured as described above, when a collision load is applied from the rear of the vehicle body at the time of a rear collision, when the collision load is input to the rear side frame 2, the collision load is provided by the load absorbing portion 6 provided on the rear side frame 2. The load input to the rear side frame 2 is transmitted to the vehicle body front side of the rear side frame 2 and dispersed.

  Further, after the buckling deformation of the load absorbing portion 6 provided on the rear side frame 2 is started, a collision load is also input to the rear subframe 50, and the load absorbing portion 54 provided on the rear subframe 50 is buckled and deformed. Absorbs load. In the rear sub-frame 50, after the buckling deformation of the rear load absorbing portion 54b, the front load absorbing portion 54a is buckled and deformed to absorb the collision load.

  The load input to the rear sub-frame 50 is transmitted from the upper frame member 51 of the rear sub-frame 50 to the front side of the vehicle body and is transmitted to the rear side frame 2 connected to the front side of the vehicle body of the rear sub-frame 50 to the front side of the vehicle body. To the rear surface portion 62 of the branch frame member 61 from the upper frame member 51 of the rear subframe 50 and the bottom surface portion 64 of the branch frame member 61 of the rear subframe 50 from the side surface portions 65 on both sides in the vicinity of the rear surface portion 62. It is transmitted to the side surface portions 65 on both sides near the bottom surface portion 64, transmitted to the lower frame member 71, and transmitted from the lower frame member 71 to the battery frame 30.

  The load input to the rear subframe 50 is also transmitted to the rear surface portion 62 of the branch frame member 61 and the side surface portions 65 in the vicinity of the rear surface portion 62 through the upper cross portion 53 and the guide portion 91 to the lower frame member 71. Is transmitted from the lower frame member 71 to the battery frame 30.

  Further, when a collision load acts on the guide portion 91 from the rear of the vehicle body at the time of a rear collision, the collision load input to the guide portion 91 is applied to the rear surface portion 62 of the branch frame member 61 and the side surface portions 65 in the vicinity of the rear surface portion 62. Is transmitted to the lower frame member 71, transmitted from the lower frame member 71 to the battery frame 30, and transmitted from the upper cross portion 53 to the upper frame member 51 of the rear subframe 50. It is transmitted to each part.

  The vehicle body 1 according to the present embodiment includes a rear side frame 2 and a rear subframe 50. As shown in FIGS. 2 and 7, a generator 41 and exhaust system parts 44 and 45 are disposed at the rear of the vehicle body. The rear sub-frame 50 includes a load absorbing portion 54 that extends from the generator 41 to the rear side of the vehicle body and is provided at the rear side of the vehicle body from the generator 41. The rear sub-frame 50 is provided on the rear side of the vehicle body from the generator 41 and on the front side of the vehicle body from the exhaust system parts 44 and 45 and extends obliquely toward the lower side of the vehicle body toward the front side of the vehicle body and extends to the exhaust system parts 44 and 45. A guide portion 91 for guiding the above is provided.

  The rear sub frame 50 includes an upper frame 131 and a lower frame 132, and the guide portion 91 is provided between a front end portion of the load absorbing portion 54 provided in the upper frame 131 and a rear end portion of the lower frame 132. Connected. The upper frame 131 is configured by the upper frame member 51 and the sub-cross member 90, and the lower frame 132 is configured by the bottom surface portion 64 of the branch frame member 61, the side surface portions 65 in the vicinity of the bottom surface portion 64, and the lower frame member 71. Has been.

  As described above, the rear body structure of the vehicle according to the present embodiment includes the rear side frame 2 and the rear subframe 50, and the generator 41 and the exhaust system parts 44 and 45 are disposed at the rear of the vehicle body. 50 includes a load absorbing portion 54 that extends from the generator 41 toward the rear side of the vehicle body and is provided at the rear side of the vehicle body from the generator 41. The rear sub-frame 50 is provided on the rear side of the vehicle body from the generator 41 and on the front side of the vehicle body from the exhaust system parts 44 and 45 and extends toward the lower side of the vehicle body toward the front side of the vehicle body. A guide portion 91 for guiding 45 is provided.

  As a result, it is possible to absorb the collision load at the time of rear collision by the load absorbing portion 54 of the rear side frame 2 provided on the rear side of the vehicle body from the generator 41, and the exhaust system parts 44 and 45 are moved to the front side of the vehicle body at the time of rear collision. When it is moved, the exhaust system parts 44 and 45 can be guided to the lower side of the vehicle body by the guide portion 91 provided on the rear side of the vehicle body from the generator 41 to prevent interference with the generator 41. Therefore, in a vehicle having the rear side frame 2 and the rear subframe 50 and having the generator 41 and the exhaust system parts 44 and 45 disposed at the rear part of the vehicle body, the exhaust system parts 44 and 45 and the generator 41 are It is possible to protect the generator 41 by preventing interference and absorb the collision load.

  The rear sub frame 50 includes an upper frame 131 and a lower frame 132, and the guide portion 91 is provided between a front end portion of the load absorbing portion 54 provided in the upper frame 131 and a rear end portion of the lower frame 132. Connected. Thereby, the load input to the guide portion 91 can be transmitted to the upper frame 131 and the lower frame 132 and can be transmitted from the lower frame 132 to the vehicle body side to be dispersed.

  The upper frame 131 includes a load absorbing portion 54 on the rear side of the vehicle body and is extended between the left and right upper frame portions 52 extending in the longitudinal direction of the vehicle body and the front end portion of the load absorbing portion 54 so as to extend in the vehicle width direction. 53, and the guide portion 91 is coupled to the upper cross portion 53. Accordingly, the rigidity of the guide portion 91 can be increased, and a load input to the guide portion 91 at the time of rear collision can be transmitted from the upper cross portion 53 to each portion of the rear subframe 50 and dispersed.

  The guide portion 91 is coupled to the upper cross portion 53 and extends from the upper cross portion 53 to the vehicle body rear side, and a portion extending from the upper cross portion 53 to the vehicle body rear side is supported by the upper cross portion 53 in a cantilever state. The Thereby, even when the exhaust system parts 44 and 45 are arranged on the rear side of the vehicle body from the upper cross part 53, the guide part 91 is formed so as to extend to the rear side of the vehicle body to the vicinity of the exhaust system parts 44 and 45. The collision load can be absorbed by the load absorbing portion 54 at the time of a rear collision, and when the exhaust system components 44 and 45 are moved to the front side of the vehicle body, the exhaust system components 44 and 45 are effectively moved to the lower side of the vehicle body by the guide portion 91. I can guide you.

  Further, the guide portion 91 includes a vertical wall portion 92 that extends obliquely toward the vehicle body lower side toward the vehicle body front side, and a plurality of ridge lines extending in the vehicle body vertical direction are formed on the vertical wall portion 92. Thereby, the bending rigidity of the guide part 91 can be improved with a ridgeline.

  In addition, the guide portion 91 includes a vertical wall portion 92 that extends obliquely toward the vehicle body lower side toward the vehicle body front side. The vertical wall portion 92 covers the generator 41 from the generator 41 so as to cover the generator 41 from the vehicle rear side. Extends downward. Thereby, since the barrier can be provided on the vehicle body rear side of the generator 41 by the vertical wall portion 92, it is possible to suppress the generator 41 from being damaged from the vehicle body rear side at the time of a rear collision.

  In the present embodiment, a vehicle such as an electric vehicle in which the range extender device 40 is disposed at the rear of the vehicle body has been described. However, in other vehicles such as an electric vehicle, a generator and an exhaust system component are disposed at the rear of the vehicle body. The present invention can be similarly applied to the installed vehicle.

  The present invention is not limited to the illustrated embodiments, and various improvements and design changes can be made without departing from the scope of the present invention.

  As described above, according to the present invention, in a vehicle including a rear side frame and a rear subframe and having a generator and an exhaust system component disposed at the rear of the vehicle body, the interference between the exhaust system component and the generator during a rear-end collision. It is possible to protect the generator and absorb the collision load, so that it may be suitably used in the manufacturing industry of this type of vehicle.

DESCRIPTION OF SYMBOLS 1 Car body 2 Rear side frame 20 Battery 30 Battery frame 40 Range extender apparatus 41 Generator 42 Engine 44 Silencer 45 Catalyst apparatus 50 Rear sub frame 52 Upper frame part 53 Upper cross part 54 Load absorption part 60 Sub frame unit 91 Guide part 92 Vertical wall Part 131 Upper frame 132 Lower frame

Claims (7)

A rear vehicle body structure comprising a left and right rear side frame extending in the vehicle body longitudinal direction at the vehicle body rear portion and a rear subframe disposed below the left and right rear side frames and extending in the vehicle body longitudinal direction,
A generator that generates electric power for traveling at the rear of the vehicle body and an exhaust system component of a drive source that drives the generator behind the generator from the vehicle body are disposed.
The rear sub-frame includes a load absorbing portion that extends to the rear side of the vehicle body from the generator and that is provided on the rear side of the vehicle body from the generator and absorbs a collision load when a collision load is applied from the rear of the vehicle body,
The rear sub-frame is provided on the rear side of the vehicle body from the generator and on the front side of the vehicle body from the exhaust system parts, and extends inclined toward the lower side of the vehicle body toward the front side of the vehicle body. A guide portion for guiding the exhaust system parts is provided;
A vehicle body structure for a rear portion of a vehicle. The rear sub-frame is provided with the load absorbing portion on the rear side of the vehicle body and extends in the longitudinal direction of the vehicle body along the rear side frame. A lower frame connected to the vehicle body,
The guide portion is connected to a front end portion of the load absorbing portion provided in the upper frame and a rear end portion of the lower frame.
The rear body structure of the vehicle according to claim 1. The upper frame of the rear sub-frame includes the left and right upper frame portions that extend in the longitudinal direction of the vehicle body along the left and right rear side frames, respectively, and the left and right upper frame portions. An upper cross portion extending between the front end portions of the load absorbing portion and extending in the vehicle width direction,
The guide portion is coupled to the upper cross portion,
The rear body structure of the vehicle according to claim 2. The guide portion extends from the upper cross portion to the vehicle body rear side, and a portion extending from the upper cross portion to the vehicle body rear side is supported by the upper cross portion in a cantilever state.
The rear body structure of a vehicle according to claim 3. The guide portion includes a vertical wall portion extending inclined toward the vehicle body lower side toward the vehicle body front side,
A plurality of ridge lines extending in the vertical direction of the vehicle body are formed on the vertical wall portion.
The vehicle rear body structure according to any one of claims 1 to 4, wherein the vehicle body structure is a rear body structure. The guide portion includes a vertical wall portion extending inclined toward the vehicle body lower side toward the vehicle body front side,
The vertical wall extends from the generator to the vehicle body lower side so as to cover the generator from the vehicle body rear side.
The rear body structure of a vehicle according to any one of claims 1 to 5, wherein the vehicle body structure is a rear body structure. The exhaust system component of the drive source is a silencer.
The rear body structure of a vehicle according to any one of claims 1 to 6, wherein the vehicle body structure is a rear body structure.

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