JP2019073122A - Electric vehicle - Google Patents

Abstract

To improve energy absorption performance during a rear-end collision to protect a power generator and an engine in an electric vehicle in which the power generator and the engine as well as a silencer are disposed at a vehicle body rear part.SOLUTION: An electric vehicle in which a power generator 41 and an engine 42 are disposed at a vehicle body rear part includes: left and right rear sub frames 50; a sub frame connection member 18 which connects the vehicle body rear sides of the left and right rear sub frames 50 at the vehicle body rear side relative to the power generator 41 and the engine 42 and extends in a vehicle width direction; and a silencer 44 disposed at the vehicle body rear side relative to the power generator 41 and the engine 42. The silencer 44 is provided so that the vehicle body rear side of the silencer 44 rotationally moves to the vehicle body lower side when the sub frame connection member 18 moves to the vehicle body front side while a buffer load from the vehicle body rear side is acting thereon.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric vehicle, and more particularly to an electric vehicle in which a generator for generating electric power for a drive motor and an engine for driving the generator are provided at the rear of a vehicle body.

  2. Description of the Related Art In vehicles such as automobiles, electrically driven vehicles such as electric vehicles including a drive motor as a drive source for driving the vehicle and a battery storing electric power supplied to the drive motor are generally known. In recent years, there is also known an electric vehicle provided with a range extender device having a generator for generating electric power for a drive motor to be supplied to a battery and an engine for driving the generator to generate electric power by the engine to improve the cruising distance. ing.

  As such an electric vehicle, for example, Patent Document 1 includes a drive motor for driving the vehicle and a battery for storing the power supplied to the drive motor, and a generator for generating the power supplied to the battery at the rear of the vehicle body It is disclosed to have a range extender device having an engine for driving a generator.

JP, 2011-152841, A

  In a vehicle such as a car, when a collision load is applied from the rear of the vehicle body in a rear-end collision (rear-collision), the vehicle body frame extending in the front-rear direction of the vehicle body in the rear collision It is required to improve energy absorption performance by bending and deforming.

  In an electric vehicle in which a generator for generating electric power for a drive motor and an engine for driving the generator are disposed at the rear of the vehicle body, when exhaust from the engine is released to the atmosphere rearward of the vehicle body from the generator and the engine. A silencer may be provided to reduce the sound.

  In such an electric vehicle, when a rear end is deformed when a collision load is applied from the rear of the vehicle at the time of a rear-end collision, the silencer may be moved to the front of the vehicle body and interfere with the generator or engine. It is desirable to improve the energy absorption performance at the time to protect a generator and an engine.

  Therefore, according to the present invention, in an electric vehicle in which a generator and an engine are disposed at the rear of a vehicle body and a silencer is disposed, the energy absorption performance at the time of a rear collision can be enhanced to protect the generator and the engine. The task is to

  In order to solve the above-mentioned subject, the present invention is characterized by having constituted as follows.

  First, the invention according to claim 1 of the present application includes a drive motor as a drive source for driving a vehicle, a generator for generating electric power for the drive motor, and an engine for driving the generator. An electric vehicle in which the generator and the engine are disposed, the left and right rear sub-frames extending in the longitudinal direction of the vehicle body at the rear of the vehicle body, and the left and right rear sub-frames at the vehicle rear side of the generator and the engine And a sub frame connecting member extending in the vehicle width direction by connecting the rear side of the vehicle body, and formed in a flat shape in the vehicle width direction rearward of the generator and the engine and forward of the sub frame connecting member in the vehicle width direction. A silencer disposed to extend, wherein the silencer causes the sub-frame connecting member to move to the front side of the vehicle body when a collision load is applied from the rear side of the vehicle body. Vehicle body rear side of the silencer when it is characterized in that the is provided so as to rotationally move the vehicle body downward.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the silencer is arranged to be inclined toward the lower side of the vehicle body relative to the front side of the vehicle body. Do.

  According to a third aspect of the invention, in the invention according to the first or second aspect, left and right rear side frames which are disposed on the vehicle body upper side with respect to the rear sub frame and extend in the vehicle longitudinal direction A generator and a side frame connecting member extending in the vehicle width direction by connecting the vehicle rear sides of the left and right rear side frames on the vehicle rear side with respect to the vehicle rear side from the engine, the vehicle body rear side from the generator and the engine and the side frame connecting member A catalyst device is provided on the front side of the vehicle body so as to extend in the vehicle width direction above the silencer, and in the catalyst device, the side frame connecting member is in front of the vehicle body when a collision load from the rear of the vehicle body is applied. It is characterized in that it is provided so as to move to the front side of the vehicle body when being moved to the side.

  According to a fourth aspect of the present invention, in the exhaust system according to the third aspect, the catalyst device is disposed extending from the engine and the silencer is disposed downstream of the catalyst device. The exhaust pipe includes a first deformation promoting portion for promoting deformation of the exhaust pipe such that the rear side of the vehicle body of the silencer is rotationally moved to the lower side between the catalyst device and the silencer. It is characterized by having.

  In the invention according to claim 5, in the invention according to claim 3 or 4, the catalyst device is disposed extending from the engine and the silencer is disposed downstream of the catalyst device. A second deformation promoting portion for promoting deformation of the exhaust pipe such that the catalyst device moves to the front side of the vehicle between the engine and the catalyst device; It is characterized by having.

  According to the invention described in claim 1 of the present application, an electric vehicle having a generator and an engine disposed at the rear of the vehicle body includes left and right rear sub-frames extending in the longitudinal direction of the vehicle body and sub-frame connecting members extending in the vehicle width direction. And a silencer disposed on the vehicle body rear side of the generator and the engine and on the vehicle body front side of the sub-frame connecting member. The silencer is provided such that when the sub-frame connecting member is moved to the vehicle front side when a collision load is applied from the rear of the vehicle body, the vehicle rear side of the silencer is rotationally moved to the vehicle lower side.

  As a result, when a collision load is applied from the rear of the vehicle body at the time of a rear collision, the vehicle body rear side of the silencer can be rotationally moved to shorten the vehicle body longitudinal length of the silencer, compared to the case where the vehicle rear side of the silencer is not rotationally moved. Thus, the energy absorbing performance can be enhanced by lengthening the longitudinal length of the rear sub-frame to be subjected to the buckling deformation. Therefore, in the electric vehicle in which the generator and the engine are disposed at the rear of the vehicle body and the silencer is disposed, the energy absorption performance at the time of the rear collision can be enhanced to protect the generator and the engine.

  If the rear side of the silencer body is not rotationally moved, it is necessary to extend the rear end of the rear sub-frame to the rear side of the vehicle body to improve the energy absorption performance in order to improve the energy absorption performance at the time of rear collision. By rotationally moving the rear side, the rear portion of the vehicle body can be made compact in the longitudinal direction of the vehicle body.

  According to the second aspect of the present invention, the silencer is disposed so that the rear side of the vehicle body is inclined to the lower side of the vehicle body relative to the front side of the vehicle body, so that a collision load acts from the rear of the vehicle body at the time of rear collision. Sometimes, the vehicle body rear side of the silencer can be rotationally moved by the sub-frame connecting member, and the above effect can be effectively obtained.

  According to the third aspect of the present invention, the catalyst device disposed on the vehicle body rear side of the generator and engine and above the silencer on the vehicle body front side of the side frame connecting member has a collision load from the rear of the vehicle body. When the side frame connecting member is moved to the vehicle body front side during operation, it is provided to move to the vehicle body front side.

  As a result, even when the catalyst device is provided above the silencer, when the collision load acts from the rear of the vehicle body at the time of a rear collision, the catalyst device is moved to the front side of the vehicle body and the vehicle rear side of the rear side frame is buckled and deformed. And the energy absorption performance can be further enhanced to protect the generator and the engine. The above effect can be effectively achieved by moving the catalyst device forward of the rear end of the silencer.

  Further, according to the invention described in claim 4, by providing the first deformation promoting portion between the catalyst device and the silencer, the exhaust pipe can receive the collision load from the rear of the vehicle body at the time of rear collision. Can be deformed in the first deformation promoting portion, so that the vehicle body rear side of the silencer can be rotationally moved without inhibiting the rotational movement of the silencer by the exhaust pipe.

  Further, according to the invention as set forth in claim 5, the exhaust pipe includes the second deformation promoting portion between the engine and the catalyst device, so that when the collision load is applied from the rear of the vehicle body at the time of rear collision, the exhaust pipe Can be deformed in the second deformation promoting portion, so that the catalyst device can be moved to the front side of the vehicle body by the exhaust pipe without inhibiting the movement of the catalyst device.

It is a bottom view of the body of the electric vehicle concerning the embodiment of the present invention. 1 is a side view of a vehicle body of an electric vehicle according to an embodiment of the present invention. It is a bottom view of the vehicle body shown in FIG. 1 which removed the sub-frame unit and the battery frame. FIG. 4 is a cross-sectional view of a vehicle body taken along line Y4-Y4 in FIG. 3; It is a perspective view of the sub-frame unit which removed the auxiliary machine. It is a top view of a sub-frame unit. It is a figure which shows typically the cross section of the vehicle body along line Y7-Y7 in FIG. It is a figure which shows the exhaust pipe connected to a catalyst apparatus and a silencer. FIG. 9 is a cross-sectional view of an exhaust pipe along the Y9A-Y9A line and the Y9B-Y9B line in FIG. 8. It is a figure which shows the exhaust pipe connected to an engine and a catalyst apparatus. It is an explanatory view for explaining movement of a silencer and a catalyst device at the time of a back collision.

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

  An electric vehicle according to an embodiment of the present invention is an electric vehicle including a drive motor as a drive source for driving the vehicle and a battery for storing electric power for the drive motor supplied to the drive motor. In addition to the drive motor and the battery, a range extender device including a generator for generating electric power for the drive motor to be supplied to the battery and an engine for driving the generator is disposed. A drive motor is disposed at the front of the vehicle body, a battery is disposed below the floor of the cabin, and a range extender device is disposed at the rear of the vehicle body.

  1 is a bottom view of the vehicle body of the electric vehicle according to the embodiment of the present invention, FIG. 2 is a side view of the vehicle body of the electric vehicle according to the embodiment of the present invention, and FIG. 1 is a bottom view of the vehicle body shown in FIG. 1, and FIG. 4 is a cross-sectional view of the vehicle body taken along line Y4-Y4 in FIG.

  As shown in FIGS. 1 to 4, the vehicle body 1 of the electric vehicle according to the present embodiment has left and right rear side frames 2 extending in the longitudinal direction of the vehicle and rear left and right rear side frames 2 at the rear of the vehicle. Left and right rear sub-frames 50 extending in the longitudinal direction of the vehicle body along the rear side frame 2 are disposed. The rear side frame 2 and the rear sub frame 50 are formed of plate-like members using a metal material.

  At the rear of the vehicle body, a rear floor portion 3 formed of a rear floor panel that extends across the left and right rear side frames 2 and extends in the longitudinal direction of the vehicle body, and a first floor surface between the left and right rear side frames 2 A cross member 4 is provided.

  An opening for arranging a range extender device 40 integrally assembled with a generator 41 for generating electric power for a drive motor supplied to the battery 20 and an engine 42 for driving the generator 41 in the rear floor portion 3 A first cross member 4 is disposed on the front side of the opening 3a.

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

  At the rear of the vehicle body, a side frame bumper 5 is provided as a side frame connecting member that connects the vehicle rear side of the left and right rear side frames 2. The side frame side bumper lane 5 has a closed cross section formed in a substantially rectangular closed cross section in an orthogonal cross section orthogonal to the vehicle width direction. The side frame bumpers 5 are disposed in a rear bumper (not shown) and extend in the vehicle width direction, and are connected to the rear side frame 2 via crash cans 6 mounted in the front and rear direction of the vehicle body attached to both ends.

  The crash can 6, as shown in FIG. 4, has a closed cross section 6a formed in a substantially cross-shaped closed cross section in an orthogonal cross section substantially orthogonal to the axial direction which is the longitudinal direction of the vehicle body A plurality of recessed portions 6b (see FIGS. 1 to 3) extending in directions are provided so as to be buckled and deformed so as to be folded when a collision load acts from the rear of the vehicle body to absorb the collision load.

  In the vehicle body 1, the rear side frame 2 is formed to have a closed cross section in cooperation with the rear floor portion 3, but the rear side frame 2 may be formed to have a substantially rectangular cross section. Moreover, although the crash can 6 is provided on the vehicle body rear side of the rear side frame 2, it is also possible not to provide the crash can 6.

  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 which inclines outward in the vehicle width direction toward the front side of the vehicle body and the vehicle lower 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 width direction on both sides in the vehicle width direction of a cabin floor portion 10 formed of a front floor panel forming a floor surface of the cabin.

  The left and right kick-up frames 9 are bridged by a kick-up portion 13 composed of a kick-up panel extending obliquely to the upper side of the vehicle body from the rear end of the cabin floor 10 toward the rear of the vehicle body. A rear floor portion 3 is provided so as to extend from the rear to the vehicle rear side.

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

  As shown in FIG. 3, a floor tunnel portion 14 extending in the longitudinal direction of the vehicle body and bulging toward the upper side of the vehicle body is formed in the vehicle room floor portion 10, and the floor tunnel portion 14 and left and right side sills are formed. A floor frame 15 extending in the longitudinal direction of the vehicle body is attached substantially at the center between the two and 11 and a tunnel rain 16 is attached to both sides in the vehicle width direction of the floor tunnel portion 14.

  The battery 20 disposed below the compartment floor 10 is attached to the battery frame 30 supporting the battery 20 in a state of being attached to the upper surface side of the battery tray 21, and the battery frame 30 is attached to the compartment floor 10 It is supported by the vehicle body 1 by being connected.

  The battery frame 30 includes a front frame (not shown) disposed on the front side of the vehicle body and extending in the vehicle width direction, a rear frame 31 disposed on the vehicle body rear side and extending in the vehicle width direction, a front frame and a rear frame 31 The side frames 32 connected on both sides and extending in the longitudinal direction of the vehicle body are provided, and the side frames 32 on both sides are attached to the floor frame 15.

  The range extender device 40 disposed at the rear of the vehicle body and having the generator 41 and the engine 42 is an auxiliary device which is an important safety part because the generator 41 uses high voltage, and the opening 3a of the rear floor portion 3 It is disposed inside and provided so as to project to the vehicle body upper side and vehicle body lower side than the rear floor portion 3.

  At the rear of the vehicle body, an exhaust pipe 43 extending from the engine 42 is also provided with a silencer 44 that reduces noise when the exhaust of the engine 42 is discharged to the atmosphere, and a catalyst device 45 having a catalyst that purifies the exhaust of the engine 42 The silencer 44 is provided in the exhaust pipe 43 downstream of the catalyst device 45.

  The silencer 44 and the catalyst device 45 are auxiliary devices that are not important safety parts, and are disposed so as to extend in the vehicle width direction rearward of the range extender device 40 on the vehicle lower side of the rear floor portion 3. The silencer 44 is formed to be flat in cross section, and the catalyst device 45 is formed to be substantially circular in cross section and disposed above the silencer 44. The silencer 44 and the catalyst device 45 are set to have higher strength against compression in the vehicle longitudinal direction than the rear side frame 2 and the rear sub frame 50.

  Auxiliary equipment disposed at the rear of the vehicle body, specifically, the range extender device 40, the silencer 44 and the catalyst device 45 are integrally assembled to the left and right rear sub frames 50 to form a sub frame unit 60 which is an integral unit, The sub frame unit 60 is assembled to the vehicle body 1 as a whole.

  FIG. 5 is a perspective view of the sub-frame unit with accessories removed, and FIG. 6 is a top view of the sub-frame unit. Note that, in FIG. 6, a support portion that supports the range extender device 40 and the silencer 44 is indicated by a two-dot chain line. As shown in FIG. 6, the sub-frame unit 60 is configured by integrally assembling the range extender device 40, the silencer 44 and the catalyst device 45 on the left and right rear sub-frames 50.

  As shown in FIGS. 5 and 6, the left and right rear sub-frames 50 are formed symmetrically in the vehicle width direction. The rear sub-frame 50 is coupled to the upper frame member 51 extending in the vehicle longitudinal direction along the rear side frame 2 and the upper frame member 51, and from the vehicle longitudinal longitudinal center side of the upper frame member 51 to the vehicle front side and the vehicle lower side And an extending lower frame member 61.

  At the rear of the vehicle body, a subframe side bumper lane 18 is provided as a subframe connecting member that connects the rear side of the left and right rear subframes 50 to the vehicle body. The subframe side bumper lane 18 has a closed cross section formed in a substantially rectangular closed cross section in an orthogonal cross section orthogonal to the vehicle width direction. The subframe side bumper lane 18 is disposed in a rear bumper (not shown) and extends in the vehicle width direction, and both ends thereof are connected to the vehicle body rear side of the left and right upper frame members 51 and connected to the rear subframe 50.

  In addition, a third cross member 55 is provided to connect the center sides of the left and right rear sub-frames 50 in the front-rear direction of the vehicle body. The third cross member 55 is disposed on the front side of the subframe side bumper lane 18 in the vehicle body direction and extends in the vehicle width direction, and both ends thereof are connected to the left and right upper frame members 51 and connected to the rear sub frame 50.

  The upper frame member 51 extends in the longitudinal direction of the vehicle along the rear side frame 2 and is formed in a closed cross section. The upper frame member 51 is provided with a load absorbing portion 52 which extends in the vehicle longitudinal direction from the range extender device 40 and absorbs a collision load when the collision load acts from the rear of the vehicle body on the vehicle rear side of the range extender device 40.

  The load absorbing portion 52 is formed in substantially the same closed cross-sectional shape in an orthogonal cross section which is substantially orthogonal to the longitudinal direction of the vehicle body, and has a closed cross-sectional portion formed in a substantially cross shape in cross section. The load absorbing portion 52 is set to have a lower strength against axial compression than the front side of the upper frame member 51 in the vehicle body.

  The silencer 44 and the catalyst device 45 are provided at a position overlapping the load absorbing portion 52 of the rear sub frame 50 in the longitudinal direction of the vehicle, and are disposed rearward of the range extender device 40 and forward of the bumper side 18 on the subframe side. It is set up.

  The upper frame member 51 includes a front frame portion 53 on the front side of the load absorbing portion 52 in the vehicle body, and the front frame portion 53 is formed in a closed cross section having a substantially rectangular cross section. The front frame portion 53 extends outward in the vehicle width direction toward the front side of the vehicle body, and is connected to the front side of the rear side frame 2 with a bolt and a nut. The front frame portion 53 is formed so that the thickness of the steel plate is thicker than that of the load absorbing portion 52, and the strength against axial compression is set high.

  The upper frame member 51 is provided with a plurality of frame connecting portions 56 connecting the rear sub-frame 50 and the rear side frame 2, and the plurality of frame connecting portions 56 are provided separately in the vehicle longitudinal direction. In the vehicle body 1, a front frame connecting portion 56a and a rear frame connecting portion 56b are provided.

  In the rear frame connecting portion 56b, the rear sub-frame 50 and the rear side frame 2 are connected by the connecting member 70. Connecting member 70 has a peripheral wall portion 71 formed in a substantially rectangular shape in a cross section orthogonal to the vehicle width direction, and a load transfer portion 72 disposed in the peripheral wall portion 71 and extending in the vehicle width direction on the inner side in the vehicle width direction. (See FIG. 5).

  The load transfer portion 72 has a closed cross-section having the same shape as the load absorbing portion 52 of the upper frame member 51, and the load transfer portion 72 is joined to the vehicle front side of the peripheral wall portion 71 at the vehicle front side. The rear side of the vehicle body is joined to the rear side of the peripheral wall portion 71.

  A bolt insertion hole 73 is formed on the vehicle body upper side and the vehicle lower side of the peripheral wall 71 on the outer side in the vehicle width direction of the connecting member 70, and as shown in FIG. A cylindrical member 74 which is formed in a shape and into which a bolt is inserted is fixed in the peripheral wall portion 71.

  In the vehicle body 1, the load absorbing portion 52 of the upper frame member 51 is divided into a front load absorbing portion 52a and a rear load absorbing portion 52b. The connecting member 70 is disposed between the front load absorbing portion 52a and the rear load absorbing portion 52b such that the closed cross section of the load transfer portion 72 coincides with the closed cross section of the load absorbing portion 52 in the vehicle longitudinal direction. The front load absorbing portion 52a and the rear load absorbing portion 52b are joined and connected.

  Also, as shown in FIG. 3, in the state where the bolt insertion holes 73 correspond to the bolt insertion holes 2 a provided in the rear side frame 2 and are arranged on the vehicle lower side of the rear side frame 2 as shown in FIG. It is connected to the rear side frame 2 by screwing on a nut welded inside.

  The front frame connecting portion 56a is also configured in the same manner as the rear frame connecting portion 56b, and the rear subframe 50 and the rear side frame 2 are connected by the connecting member 70.

  The connecting member 70 of the front frame connecting portion 56 a has the front load absorbing portion 52 a and the front frame portion 53 such that the closed cross section of the load transmitting portion 72 matches the closed cross section of the load absorbing portion 52 in the vehicle longitudinal direction. , And joined and connected to the front load absorbing portion 52a and the front frame portion 53.

  The left and right connecting members 70 constituting the front frame connecting portion 56 a are connected by the third cross member 55. The third cross member 55 is formed in a closed cross-sectional shape, and both ends thereof are joined and connected to the inner side in the vehicle width direction of the left and right connecting members 70.

  The lower frame member 61 is joined to the vehicle body front side of a connecting member 70 constituting the front frame connecting portion 56 a on the vehicle body rear side, and is connected to the upper frame member 51 via the connecting member 70. The lower frame member 61 has a closed cross section formed in a substantially rectangular closed cross section in an orthogonal cross section orthogonal to the vehicle longitudinal direction, and extends substantially linearly in the vehicle longitudinal direction. As shown in FIGS. 1 and 2, the lower frame member 61 is joined to the battery frame 30 by joining the front side of the vehicle body to the battery frame 30.

  As shown in FIG. 6, the range extender device 40 is disposed on the front side of the load absorbing portion 52 of the upper frame member 51 on the vehicle body side, and the upper frame member 51 is provided by left and right side support portions 75 provided on both sides in the vehicle width direction. , And is attached to the third cross member 55 by a rear support 76 provided on the rear side of the vehicle body.

  The silencer 44 is attached to a connecting member 70 constituting the rear frame connecting portion 56 b by left and right side support portions 77 provided on both sides in the vehicle width direction. The side support portion 77 is configured to be capable of releasing the support of the silencer 44 with respect to the connection member 70 when a collision load acts from the rear of the vehicle body.

  For example, the side support portion 77 is formed so that the side support portion 77 is divided when a collision load acts from the rear of the vehicle body, and the support of the silencer 44 with respect to the connection member 70 can be released. Further, for example, in the side support portion 77, the connecting member side rod fixed to the connecting member 70, the silencer side rod fixed to the silencer 44, and the connecting member side rod and the silencer side rod are respectively in the vehicle longitudinal direction. A rubber member as an elastic body to be inserted is formed, and the silencer side rod is formed to be separated from the rubber member when a collision load acts from the rear of the vehicle body, so that the support of the silencer 44 with respect to the connecting member 70 can be released. Configured

  FIG. 7 is a view schematically showing a cross section of the vehicle body taken along line Y7-Y7 in FIG. In FIG. 7, the rear side frame 2 and the rear sub frame 50 are also indicated by two-dot chain lines. As shown in FIG. 7, the silencer 44 is disposed such that the rear side of the vehicle body is inclined to the lower side of the vehicle body as compared to the front side of the vehicle body. The silencer 44 is disposed on the vehicle body front side with respect to the subframe side bumper lane 18 and is provided such that the upper surface 44 a on the vehicle body rear side faces the closed cross section of the subframe side bumper lane 18 in the vehicle longitudinal direction.

  The rear side of the silencer 44 is pushed by the subframe side bumper lane 18 which is moved to the front side of the vehicle when a collision load is applied from the rear side of the vehicle, and the silencer 44 moves to the front side of the vehicle. It is provided to rotate downward.

  The catalyst device 45 is provided above the silencer 44 so as to overlap the silencer 44 in the longitudinal direction of the vehicle body. The catalyst device 45 is disposed forward of the side frame side bumper lane 5 in the vehicle body, and is disposed such that the vehicle body rear side faces the closed cross section of the side frame side bumper lane 5 in the vehicle longitudinal direction.

  The catalyst device 45 is provided so that the vehicle frame rear side of the catalyst device 45 is pushed by the side frame side bumper lane 5 moved to the vehicle front side when a collision load is applied from the rear of the vehicle body and moves to the vehicle front side. .

  FIG. 8 is a view showing an exhaust pipe connected to the catalyst device and the silencer. As shown in FIG. 8, an exhaust pipe 43 connected to the catalyst device 45 and the silencer 44 extends from the silencer 44 to the catalyst device 45 toward the vehicle body upper side. The exhaust pipe 43 promotes deformation of the exhaust pipe 43 so that the vehicle rear side of the silencer 44 rotationally moves to the vehicle lower side when a collision load acts from the rear of the vehicle between the catalyst device 45 and the silencer 44 The first deformation promoting portion 43a is provided.

  FIG. 9 is a cross-sectional view of the exhaust pipe taken along the Y9A-Y9A line and the Y9B-Y9B line in FIG. 8, FIG. 9A is a cross-sectional view along the Y9A-Y9A line, and FIG. , Y9B-Y9B, respectively. As shown in FIG. 9A, the exhaust pipe 43 is formed in a substantially circular shape in cross section, but in the first deformation promoting portion 43a, the length in the vehicle longitudinal direction is shorter than the length in the vehicle width direction As such, the cross section is deformed into a substantially flat shape.

  FIG. 10 is a view showing an exhaust pipe connected to an engine and a catalyst device. As shown in FIG. 10, the exhaust pipe 43 connected to the engine 42 and the catalyst device 45 is located on the center side in the vehicle longitudinal direction between the engine 42 and the catalyst device 45 obliquely upward from the engine 42 toward the vehicle body rear side. It extends up to the catalyst device 45 obliquely downward from the center side in the longitudinal direction of the vehicle between the engine 42 and the catalyst device 45 toward the rear side of the vehicle body.

  The exhaust pipe 43 promotes deformation of the exhaust pipe 43 so that the catalyst device 45 moves to the front side of the vehicle body when a collision load acts from the rear of the vehicle body between the catalyst device 45 and the silencer 44. A deformation promoting portion 43 b is provided. Similar to the first deformation promoting portion 43a, the second deformation promoting portion 43b is deformed so as to have a substantially flat cross section so that the length in the front-rear direction of the vehicle body is shorter than the length in the vehicle width direction.

  In the vehicle body 1 configured in this manner, when a collision load is applied to the side frame side bumper lane 5 and the subframe side bumper lane 18 when a collision load acts from the rear of the vehicle body at the time of rear collision, the rear side frame 2 and the rear sub The side frame side bumper reinforcement 5 and the subframe side bumper reinforcement 18 are moved to the front side of the vehicle body while the frame 50 buckles and deforms from the rear side of the vehicle body to absorb an impact load.

  FIG. 11 is an explanatory view for explaining the movement of the silencer and the catalyst device at the time of the rear collision. As shown in FIG. 11A, when a collision load acts from the rear of the vehicle body at the time of a rear collision of the vehicle body 1, the rear portion of the vehicle body is deformed from the rear side of the vehicle body, and the collision load is applied to the side frame side bumper rain 5 and the subframe side bumper rain 18 Is input.

  When a collision load is input to the side frame side bumper lane 5 and the subframe side bumper lane 18, as shown in FIG. 11 (b), the side frame side bumper lane 5 and the subframe side bumper lane 18 are moved to the vehicle front side. The rear side frame 2 and the rear sub frame 50 undergo buckling deformation from the rear side of the vehicle body to absorb an impact load.

  As shown in FIG. 11B, when the subframe side bumper lane 18 is moved to the front side of the vehicle body, the silencer 44 is provided so as to face the subframe side bumper lane 18 in the vehicle longitudinal direction. The subframe side bumper lane 18 contacts the rear side of the vehicle body.

  When the subframe side bumper lane 18 is further moved to the vehicle body front side, it is pushed by the subframe side bumper lane 18 as shown by arrow A1 in FIG. 11C, and the vehicle body rear side of the silencer 44 rotationally moves to the vehicle body downward side. At the same time, the vehicle rear side of the rear sub-frame 50 is further subjected to buckling deformation to absorb impact load. The rotationally moved silencer 44 is disposed within the remaining range of the rear sub-frame 50.

  Further, when the side frame side bumper lane 5 is further moved to the front side of the vehicle body, as shown by arrow A2 in FIG. 11C, the side frame side bumper lane 5 pushes the catalyst device 45 and the catalyst device 45 is moved to the vehicle front side. At the same time, the vehicle rear side of the rear side frame 2 is further subjected to buckling deformation to absorb impact load. The silencer 44 moved to the front side of the vehicle body is disposed within the range of the remaining crushing of the rear side frame 2.

  In this manner, the vehicle rear side of the silencer 44 is rotationally moved to the vehicle lower side, whereby the vehicle front-rear length of the silencer 44 can be shortened, and the vehicle front-rear length of the rear sub-frame 50 buckled and deformed at the time of rear collision. To increase energy absorption performance.

  When a collision load is applied from the rear of the vehicle body at the time of a rear collision, the exhaust pipe 43 is bent and deformed starting from the first deformation promoting portion 43 a so as not to inhibit the rotational movement of the silencer 44. It bends and deforms from the second deformation promoting portion 43b so as not to inhibit the movement to the lower side.

  In the present embodiment, the first deformation promoting portion 43a and the second deformation promoting portion 43b provided in the exhaust pipe 43 are formed in a substantially flat cross-section having a longer vehicle width direction than the vehicle front-rear direction. The thickness of the exhaust pipe 43 is reduced, the diameter of the exhaust pipe 43 is reduced, or a recess is formed in the exhaust pipe 43 to form a fragile portion in the exhaust pipe 43 so as to promote the deformation of the exhaust pipe 43 It is also possible.

  As described above, in the electric vehicle according to the present embodiment, the generator 41 and the engine 42 are disposed at the rear of the vehicle body, and the left and right rear sub-frames 50 extending in the vehicle longitudinal direction and the subframe side bumpers 18 extending in the vehicle width direction And a silencer 44 disposed on the vehicle body rear side of the generator 41 and the engine 42 and on the vehicle body front side of the subframe side bumper lane 18. The silencer 44 is provided so that the vehicle rear side of the silencer 44 is rotationally moved to the vehicle lower side when the subframe side bumper lane 18 is moved to the front of the vehicle when a collision load is applied from the rear of the vehicle.

  Thereby, when a collision load acts from the rear of the vehicle body at the time of a rear collision, the vehicle body rear side of the silencer 44 can be rotationally moved to shorten the vehicle body longitudinal length of the silencer 44 and the vehicle body rear side of the silencer 44 is not rotationally moved. As compared with the above, it is possible to increase the energy absorbing performance by lengthening the longitudinal length of the rear sub-frame 50 to be subjected to the buckling deformation. Therefore, in the electric vehicle in which the generator 41 and the engine 42 are disposed at the rear of the vehicle body and the silencer 44 is disposed, the energy absorption performance at the time of a rear collision can be enhanced to protect the generator 41 and the engine 42. .

  When the vehicle rear side of the silencer 44 is not rotationally moved, it is necessary to extend the rear end of the rear sub frame 50 to the rear side of the vehicle to enhance the energy absorption performance in order to enhance the energy absorption performance at the rear collision. By rotationally moving the rear side of the vehicle body 44, the rear portion of the vehicle body can be made compact in the longitudinal direction of the vehicle body.

  Further, the silencer 44 is disposed so that the rear side of the vehicle body is inclined to the lower side of the vehicle body as compared to the front side of the vehicle body. As a result, when a collision load acts from the rear of the vehicle body at the time of a rear-end collision, the vehicle body rear side of the silencer 44 can be rotationally moved by the subframe side bumper lane 18, effectively protecting the generator 41 and the engine 42. it can.

  Further, the catalyst device 45 disposed on the vehicle body rear side of the generator 41 and the engine 42 and above the silencer 44 on the vehicle body front side than the side frame side bumper rain 5 is a side frame side bumper lane when a collision load from the vehicle body rear acts. 5 is provided to move to the front side of the vehicle body when it is moved to the front side of the vehicle body.

  Thus, even when the catalyst device 45 is provided above the silencer 44, the catalyst device 45 is moved forward of the vehicle body when the collision load acts from the rear of the vehicle body at the time of a rear collision, and the vehicle rear side of the rear side frame 2 Can be buckled and the energy absorption performance can be further enhanced to protect the generator 41 and the engine 42. By moving the catalyst device 45 to the front side of the vehicle body from the rear end portion of the silencer 44, the generator 41 and the engine 42 can be effectively protected.

  In addition, the exhaust pipe 43 includes a first deformation promoting portion 43 a between the catalyst device 45 and the silencer 44. Thus, the exhaust pipe 43 can be deformed in the first deformation promoting portion 43a when a collision load is applied from the rear of the vehicle body at the time of a rear collision, so the exhaust pipe 43 does not inhibit the rotational movement of the silencer 44. The rear side of the vehicle can be rotationally moved.

  In addition, the exhaust pipe 43 is provided with a second deformation promoting portion 43 b between the engine 42 and the catalyst device 45. As a result, the exhaust pipe 43 can be deformed in the second deformation promoting portion 43b when a collision load acts from the rear of the vehicle body at the time of rear-end collision, so the exhaust pipe 43 does not inhibit the movement of the catalyst device 45. 45 can be moved to the front side of the vehicle body.

  The present invention is not limited to the illustrated embodiment, and various improvements and design changes are possible without departing from the scope of the present invention.

  As described above, according to the present invention, in the electric vehicle in which the generator and the engine are disposed at the rear of the vehicle body and the silencer is disposed, the energy absorption performance at the time of the rear collision is enhanced to protect the generator and the engine. It is possible to be suitably used in this type of electric vehicle.

Reference Signs List 1 vehicle body 2 rear side frame 5 side frame side bumper lane 18 subframe side bumper lane 20 battery 40 range extender device 41 generator 42 engine 43 exhaust pipe 43a first deformation promoting portion 43b second deformation promoting portion 44 silencer 45 catalyst device 50 rear subframe 60 subframe unit

Claims (5)

An electric motor comprising a drive motor as a drive source for driving a vehicle, a generator for generating electric power for the drive motor, and an engine for driving the generator, the generator and the engine being disposed at the rear of a vehicle body A vehicle,
Left and right rear sub-frames extending in the longitudinal direction of the vehicle at the rear of the vehicle;
A sub frame connecting member extending in the vehicle width direction by connecting the rear side of the left and right rear sub-frames on the rear side with respect to the generator and the vehicle;
And a silencer which is formed flat and extends in the vehicle width direction on the vehicle body rear side of the generator and the engine and on the vehicle body front side of the sub frame connecting member.
The silencer is provided so that the vehicle rear side of the silencer is rotationally moved downward when the sub-frame connecting member is moved to the front of the vehicle when a collision load is applied from the rear of the vehicle.
An electric vehicle characterized by The silencer is disposed such that the rear side of the vehicle body is inclined downward relative to the front side of the vehicle body.
The electric vehicle according to claim 1, Left and right rear side frames disposed on the vehicle body upper side with respect to the rear sub-frame and extending in the vehicle longitudinal direction;
A side frame connecting member extending in the vehicle width direction by connecting the vehicle body rear sides of the left and right rear side frames on the vehicle body rear side with respect to the generator and the engine;
The generator and a catalyst device disposed on the vehicle body rear side of the engine and on the vehicle body front side of the side frame connecting member so as to extend in the vehicle width direction above the silencer;
The catalyst device is provided so as to move forward of the vehicle body when the side frame connecting member is moved forward of the vehicle body when a collision load is applied from the rear of the vehicle body.
The electric vehicle according to claim 1 or 2, wherein The exhaust pipe is provided with the catalyst device extending from the engine and the silencer disposed downstream of the catalyst device.
The exhaust pipe is provided with a first deformation promoting portion between the catalyst device and the silencer for promoting deformation of the exhaust pipe so that the rear side of the vehicle body of the silencer rotationally moves downward.
The electric vehicle according to claim 3, The exhaust pipe is provided with the catalyst device extending from the engine and the silencer disposed downstream of the catalyst device.
The exhaust pipe is provided with a second deformation promoting portion between the engine and the catalyst device, which promotes deformation of the exhaust pipe so that the catalyst device moves to the front side of the vehicle body.
The electric vehicle according to claim 3 or 4, characterized in that:

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