JP2019077239A - Electric vehicle - Google Patents

Abstract

To provide an electric vehicle which enables improvement of attachment rigidity of a cover member attached to a motor housing while inhibiting increase of a weight.SOLUTION: In an electric vehicle, a motor 10 for driving wheels is disposed in a motor room 2 located at the vehicle front side and includes: a motor housing 40 in which the motor 10 is disposed; a cover member 60 attached to one side of the motor housing 40 as seen in a vehicle width direction; and an axle housing 50 in which a transaxle 15 including a power transmission mechanism 14 is disposed and which is attached to the other side of the motor housing 40 as seen in the vehicle width direction. A mount bracket 70 on which a cross member 4 extending in the vehicle width direction above the motor 10 is mounted and supported and a support bracket 80 which supports a front wheel drive shaft 17 to which power of the power transmission mechanism 14 is transmitted are attached to the cover member 60.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric vehicle, and more particularly to an electric vehicle in which a motor as a power source for driving a wheel is disposed in a motor room in front of the vehicle.

  Vehicles such as automobiles are provided with a motor as a power source for driving the wheels and a battery for storing electric power supplied to the motor, and the motor is disposed in the motor room in front of the vehicle and the output of the motor is a power transmission mechanism There is known an electric vehicle such as an electric car that transmits power to the front wheels via a drive shaft (see, for example, Patent Document 1).

JP, 2011-152841, A

  In an electric vehicle in which the motor for driving the wheel is disposed in the motor room ahead of the vehicle, the motor is disposed such that the motor output shaft is in the vehicle width direction, and both sides in the vehicle width direction of the motor housing In some cases, an axle housing is internally provided with a transaxle including a power transmission mechanism including a cover member and a reduction mechanism and a differential mechanism for transmitting the output of the motor to the front wheels.

  In the electric vehicle, the motor is attached to the vehicle body by suspending the cover member and the axle housing via a mounting bracket to a cross member which is extended between the left and right side frames and extends in the vehicle width direction above the motor. Sometimes.

  In such a case, it is required to secure the mounting rigidity of the cover member and the axle housing attached to the cross member, but the cover member may be less rigid than the axle housing on which the speed reduction mechanism and the differential mechanism are assembled. From the point of view, it is desirable to improve the mounting rigidity of the cover member.

  On the other hand, by increasing the thickness of the cover member, the rigidity of the cover member can be enhanced to enhance the attachment rigidity of the cover member attached to the cross member, but increasing the thickness of the cover member increases the weight of the electric vehicle It is desirable to improve the mounting rigidity of the cover member while suppressing the increase in weight.

  Therefore, the present invention can improve the mounting rigidity of the cover member attached to the motor housing while suppressing an increase in weight in the electric vehicle in which the motor for driving the wheel is disposed in the motor room in front of the vehicle. Let's make it a task.

  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 is an electric vehicle in which a motor as a power source for driving a wheel is disposed in a motor room in front of the vehicle so that a motor output shaft extends in the vehicle width direction. A transaxle including a motor housing in which the motor is disposed inside, a cover member attached to one side in the vehicle width direction of the motor housing, and a power transmission mechanism for transmitting the output of the motor to the front wheels An axle housing disposed on the other side of the motor housing in the vehicle width direction, the cover member being bridged between left and right side frames extending in the longitudinal direction of the vehicle body, the vehicle width direction above the motor Bracket for mounting and supporting to a cross member extending to the rear of the vehicle, and a drive for a front wheel to which power is transmitted from the power transmission mechanism Characterized in that a support bracket for supporting the Yafuto is attached.

  In the invention according to claim 2, in the invention according to claim 1, the mount bracket and the support bracket are respectively disposed on one side and the other side of the motor output shaft in the cover member in the longitudinal direction of the vehicle body. It is characterized in that it is attached.

  The invention according to claim 3 is that, in the invention according to claim 1 or 2, a compressor for an air conditioner is attached to the cover member on the side opposite to the motor housing side. It features.

  According to the invention described in claim 1 of the present application, an electric vehicle in which a motor for driving a wheel is disposed in a motor room in front of the vehicle has a motor housing in which the motor is disposed and one of the motor housings in the vehicle width direction. A cover member attached to the side, and an axle housing provided with a transaxle including a power transmission mechanism and attached to the other side of the motor housing in the vehicle width direction. A mount bracket mounted on a cross member extending in the vehicle width direction above the motor and a support bracket supporting a drive shaft for a front wheel to which power is transmitted from a power transmission mechanism are attached to the cover member.

  Thus, in addition to the mounting bracket, the support bracket is attached to the cover member attached to the motor housing in which the motor is disposed, in the electric vehicle in which the motor for driving the wheel is disposed in the motor room ahead of the vehicle. Compared with the case where the support bracket is attached to the motor housing and not attached to the cover member, the rigidity of the cover member can be enhanced while suppressing the increase in weight, and the attachment to the motor housing is possible while suppressing the increase in weight. The mounting rigidity of the cover member can be improved.

  In addition, since the support bracket is attached to the cover member, the joint between the joint shaft and the drive shaft is disposed on the front wheel side to increase the drive shaft bending angle as compared with the case where the support bracket is attached to the motor housing. it can. When the sub-frame extending in the vehicle longitudinal direction along the side frames below the left and right side frames is disposed below the drive shaft, interference between the drive shaft and the sub-frame can be suppressed.

  According to the second aspect of the present invention, the mount bracket and the support bracket are attached to one side and the other side of the cover member on the one side in the longitudinal direction of the vehicle from the motor output shaft. The cover member can be reinforced in the longitudinal direction of the vehicle body.

  According to the third aspect of the present invention, the compressor for the air conditioner can be further reinforced by the compressor for the air conditioner by attaching the compressor for the air conditioner to the cover member on the opposite side to the motor housing side. The rigidity of the cover member can be further enhanced.

FIG. 1 is a perspective view of a power unit disposed in a motor room of an electrically powered vehicle according to an embodiment of the present invention as viewed from the rear side and the lower side of a vehicle body. It is a rear view which shows the power unit arrange | positioned in the motor room of an electric vehicle. It is the perspective view which looked at the cover member and its vicinity from the vehicle body rear side and the vehicle body right side. It is a rear view which shows a cover member and its vicinity. It is a front view which shows a cover member and its vicinity. It is a right side view showing a cover member and its neighborhood. It is an explanatory view for explaining attachment of a mount bracket of a cover member to a cross member. It is a rear view which shows the power unit by which the support bracket was attached to the motor housing.

  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 motor as a power source for driving a wheel, and a battery for storing electric power for the motor supplied to the motor. In addition to the above, there is disposed a range extender device including a generator for generating electric power for a motor to be supplied to the battery and an engine for driving the generator. A 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.

  FIG. 1 is a perspective view of a power unit disposed in a motor room of an electric vehicle according to an embodiment of the present invention as viewed from the rear of the vehicle body and from below the vehicle body. FIG. 2 is disposed in the motor room of the electric vehicle. 3 is a perspective view of the cover member and the vicinity thereof as viewed from the rear side of the vehicle body and the right side of the vehicle body, and FIGS. 4, 5 and 6 are rear views showing the cover member and the vicinity thereof, respectively. , A front view and a right side view. 4 to 6, the joint shaft and the drive shaft are omitted, and in FIGS. 4 and 6, a part of the support bracket for supporting the drive shaft is omitted.

  As shown in FIGS. 1 and 2, in the vehicle body 1 of the electric vehicle according to the present embodiment, the motor 10 as a power source for driving the wheels is in the motor room 2 in front of the vehicle motor output shaft 11 (see FIG. 6) Are disposed horizontally to extend in the vehicle width direction. The motor 10 constitutes a power unit 30 together with a transaxle 15 including a power transmission mechanism 14 having a speed reduction mechanism 12 and a differential mechanism 13 for transmitting the output of the motor 10 to wheels, specifically front wheels.

  Motor 10 is disposed on the center side in the vehicle width direction in motor room 2, and power transmission mechanism 14 is disposed offset to the left side of the vehicle body in motor room 2. The reduction mechanism 12 is connected to the motor 10 and disposed on the left side of the motor 10, and the differential mechanism 13 is connected to the reduction mechanism 12 and disposed on the rear side of the reduction mechanism 12.

  A joint shaft 16 extending to both sides in the vehicle width direction is connected to the differential mechanism 13. The joint shaft 16 on the right side of the vehicle body is formed longer than the joint shaft 16 on the left side of the vehicle body, and extends in the vehicle width direction at the rear of the motor 10.

  Drive shafts 17 extending in the vehicle width direction are connected to the outside in the vehicle width direction of the left and right joint shafts 16 respectively. The drive shaft 17 has a differential mechanism side constant velocity joint 18 connected to the joint shaft 16 and a wheel side constant velocity joint 19 connected to the front wheel.

  Like the drive shaft 17 on the right side of the vehicle shown by a two-dot chain line in FIG. 2, the drive shaft 17 has a portion on the outer side in the vehicle width direction than the differential mechanism side constant velocity joint 18 up to a predetermined drive shaft bending angle. It is possible to swing in the vertical direction of the vehicle body according to.

  The power unit 30 transmits the output of the motor 10 from the motor output shaft 11 to the left and right front wheels through the transaxle 15 including the power transmission mechanism 14 including the speed reduction mechanism 12 and the differential mechanism 13, the joint shaft 16 and the drive shaft 17. The motor 10 drives the front wheels.

  In the motor room 2, a pair of left and right side frames 3 extending in the longitudinal direction of the vehicle body outside the power unit 30 in the vehicle width direction and formed in a substantially rectangular shape in cross section are disposed. The left and right side frames 3 are connected to both ends of a side frame side bumper lane extending in the vehicle width direction via a crash can on the front side of the vehicle body.

  Between the left and right side frames 3, a cross member 4 which extends in the vehicle width direction on the vehicle body rear side of the side frame side pampere and is formed into a substantially rectangular cross section is provided. A cross member side bracket 5 extending in the form of a flat plate on the outer side in the vehicle width direction is fixed to the upper surfaces of both end portions in the vehicle width direction of the cross member 4 with fastening bolts. A side frame side bracket 6 formed in a substantially hat-shaped cross section so as to cover from the upper side is fixed using a fastening bolt.

  The cross member 4 is formed by connecting the cross member side bracket 5 and the side frame side bracket 6 via an elastic member such as rubber provided between the cross member side bracket 5 and the side frame side bracket 6. It is connected to the left and right side frames 3. It is also possible to connect the cross member 4 to the left and right side frames 3 by respectively joining both end portions in the vehicle width direction of the cross member 4 to the inner side in the vehicle width direction of the left and right side frames 3.

  An inverter 21 which converts DC power stored in a battery disposed below the vehicle floor as an electrical component for the motor 10 into AC power and supplies the AC power to the motor 10 on the upper side of the vehicle body of the cross member 4; Power from an external power supply such as a 100 V or 200 V household power supply is input to charge the battery, an on-board charger 22, a DC / DC converter 23 for converting the battery voltage to an appropriate level, connection of electric wires, branching And the like, and a vehicle control module (VCM: Vehicle Control Method) 25 for controlling various systems of the electric vehicle including the motor 10 is also provided.

  An inverter 21 and an on-vehicle charger 22 are mounted side by side in the vehicle width direction on the vehicle body upper side of the cross member 4. A junction box 24 is attached to the upper side of the vehicle body of the inverter 21, a DC / DC converter 23 is attached to the upper side of the vehicle body of the on-vehicle charger 22, and a vehicle control module 25 is attached to the upper side of the DC / DC converter 23.

  A power unit 30 including a motor 10 is disposed on the lower side of the vehicle body of the cross member 4, and the power unit 30 is suspended by and mounted on the cross member 4 bridged between the side frames 3.

  The power unit 30 includes a motor housing 40 in which the motor 10 is disposed inside and formed in a substantially cylindrical shape, and a transaxle 15 including the power transmission mechanism 14 disposed inside to cover the left side of the motor housing 40. And a cover member 60 mounted on the right side of the motor housing 40 in the vehicle width direction so as to cover the right side of the motor housing 40 in the vehicle body.

  The axle housing 50 is fastened and fixed using a motor housing 40 and a fastening bolt (not shown). The axle housing 50 has a speed reduction mechanism housing portion 51 for housing the speed reduction mechanism 12 and a differential mechanism housing portion 52 for housing the differential mechanism 13.

  The reduction gear housing 51 is provided on the left side of the motor housing 40 in the vehicle body, and the differential gear housing 52 is provided on the rear side of the reduction gear housing 51 on the vehicle body. The axle housing 50 is provided such that the differential mechanism accommodating portion 52 bulges rearward from the motor housing 40.

  The left and right joint shafts 16 connected to the differential mechanism 13 accommodated in the differential mechanism accommodation portion 52 are provided on the axle housing 50 so as to extend outward in the vehicle width direction. As described above, the drive shafts 17 are connected to the joint shafts 16 respectively.

  As described later, the cover member 60 is provided with a support bracket 80 for supporting the drive shaft 17 on the rear side of the vehicle body, and the drive shaft 17 on the right side of the vehicle body is inward of the differential mechanism side constant velocity joint 18 in the vehicle width direction. A portion is rotatably supported by the support bracket 80.

  In the vehicle body 1, right and left sub-frames 20 extending in the longitudinal direction of the vehicle body along the side frames 3 are formed below the left and right side frames 3 and formed in a substantially rectangular shape in cross section. The left and right sub-frames 20 are disposed below the drive shaft 17, and the front side of the vehicle body is connected to both ends of a sub-frame side bumper lane extending in the vehicle width direction.

  As shown in FIG. 3 to FIG. 6, the cover member 60 is formed in a plate shape, and extends inward in the vehicle width direction from the vertical wall 61 extending in the direction substantially orthogonal to the motor output shaft 11 and the vertical wall 61. An extending peripheral wall portion 62 and a flange portion 63 extending outward in a direction substantially orthogonal to the motor output shaft 11 from an inner side in the vehicle width direction of the peripheral wall portion 62 are provided. The vehicle width direction inner side of the vertical wall portion 61 is configured to support the end portion of the motor output shaft 11 on the right side of the vehicle body via a bearing.

  The flange portion 63 is formed with a bolt insertion hole through which a fastening bolt B1 for attaching the cover member 60 to the motor housing 40 is inserted. In the motor housing 40, a cover member attachment boss 41 is provided corresponding to a bolt insertion hole formed in the flange 63, and a screw hole is formed in the cover member attachment boss 41.

  The cover member 60 is screwed into the screw hole of the cover member mounting boss portion 41 of the motor housing 40 through the bolt insertion hole formed by overlapping the flange portion 63 on the vehicle body right side of the motor housing 40 and forming the fastening bolt B1. By mounting, it is attached to the motor housing 40.

  In the present embodiment, a mounting bracket 70 for mounting and supporting the cross member 4 and a support bracket 80 for supporting the drive shaft 17 are attached to the cover member 60.

  FIG. 7 is an explanatory view for explaining attachment of the mounting bracket of the cover member to the cross member. In the cover member 60, as shown in FIGS. 3 to 6, the mount bracket 70 is attached to the upper side and the front side of the vehicle body. As shown in FIG. 7, the mounting bracket 70 has a substantially T-shaped cover member side fixing portion 71 attached to the cover member 60 and a substantially cylindrical cross member side attached to the cross member 4. And a fixing portion 72. The cross member side fixing portion 72 is provided on the vehicle body upper side and the vehicle rear side of the cover member side fixing portion 71 and is integrally formed with the cover member side fixing portion 71.

  The cover member side fixing portion 71 is formed with a bolt insertion hole at each end portion formed in a T-shape. As shown in FIGS. 3 to 6, the cover member 60 is provided with a mount bracket mounting portion 64 to which the cover member side fixing portion 71 is attached so as to project to the right side of the vehicle body on the vehicle body upper side.

  The mount bracket mounting portion 64 protrudes upward from the peripheral wall 62 of the cover member 60 and extends rightward from the vertical wall 61 of the cover member 60, and then protrudes upward from the vehicle body to have a substantially U shape as viewed from the front of the vehicle. Is formed. The mount bracket mounting portion 64 includes a mounting surface portion 65 extending in a direction substantially orthogonal to the vehicle longitudinal direction on the front side of the vehicle body, and the mounting surface portion 65 is provided on the vehicle front side relative to the motor output shaft 11. The mounting bracket mounting portion 64 is formed with screw holes 66 corresponding to the bolt insertion holes formed in the cover member side fixing portion 71.

  In the mounting bracket 70, the rear side of the cover member side fixing portion 71 of the mounting bracket 70 is superimposed on the mounting surface portion 65 of the mounting bracket mounting portion 64 provided on the cover member 60, and the fastening bolt B2 is fixed to the cover member side fixing portion 71. It is attached to the cover member 60 by screwing with the screw hole 66 formed in the mount bracket attachment portion 64 through the bolt insertion hole formed in the.

  In the cross member side fixing portion 72, an elastic body 73 made of an elastic member such as rubber is fixed and attached to the inside of a portion formed in a substantially cylindrical shape. As shown in FIG. 7, the cross member 4 is provided with a recess 45 recessed in a substantially trapezoidal shape in cross section from the front side of the vehicle body to the rear side of the vehicle body in a portion where the mount bracket 70 is supported.

  The recess 45 formed in the cross member 4 has an upper surface 45a, a side surface 45b extending obliquely from the upper surface 45a to both sides in the vehicle width direction, and a rear surface 45c extending from the rear side of the upper surface 45a to the lower side of the vehicle And. The cross member 4 is formed with a notch 46 recessed toward the vehicle body upper side in a substantially rectangular shape as viewed from the lower side of the vehicle body so as not to interfere with the mount bracket 70. The rear surface 45c is divided into a right rear surface 45d and a left rear surface 45e in the vehicle width direction by the notch 46, and screw holes are formed in the right rear surface 45d and the left rear surface 45e, respectively.

  A mounting shaft 47 extending in the vehicle width direction is inserted into an elastic body 73 provided on the cross member side fixing portion 72 of the mounting bracket 70. The mounting shaft 47 is formed in a substantially square pole shape, and bolt insertion holes extending in the longitudinal direction of the vehicle body are formed on both sides in the vehicle width direction.

  In a state where the cover member side fixing portion 71 of the mount bracket 70 is attached to the cover member 60 and the mounting shaft 74 is inserted through the elastic body 73 attached to the cross member side fixing portion 72, the mounting shaft 74 and the cross member 4 Screw holes formed in the right rear surface 45d and the left rear surface 45e of the recess 45 of the cross member through the bolt insertion holes formed in the mounting shaft 47 by superposing the rear surface 45c of the recess 45 formed The cover member 60 is mounted on and supported by the cross member 4 via the mounting bracket 70 by being screwed into position.

  In the vehicle body 1, the elastic body 73 attached to the cross member side fixing portion 72 is divided into four elastic bodies above, below, to the front and back of the mounting shaft 74, but is formed in a cylindrical shape The mounting shaft 74 may be inserted into the elastic body.

  A supporting bracket 80 for supporting the drive shaft 17 on the rear side of the motor output shaft 11 is attached to the cover member 60. The support bracket 80 includes a front support bracket 81 that supports the front side of the drive shaft 17 and a rear support bracket 86 that supports the rear side of the drive shaft 17.

  The front side support bracket 81 has a base portion 82 formed in a substantially triangular shape, and a projecting portion 83 projecting from the base portion 82 in a substantially rectangular columnar shape. The base portion 82 is disposed such that one top is disposed on the upper side of the vehicle body, and two tops are disposed spaced apart in the vehicle width direction on the lower side of the vehicle body, and bolt insertion holes are formed in each of the three peaks. .

  The projecting portion 83 has screw holes 84 respectively formed on the vehicle body upper side and the vehicle body lower side in the end face on the rear side of the vehicle body, and a substantially semicircle in a cross section orthogonal to the vehicle width direction on the center side in the vehicle vertical direction And a support portion 85 which is recessed toward the front side of the vehicle body to support the front side of the drive shaft 17.

  The cover member 60 is provided with three support bracket attachment bosses 67 which are extended toward the rear of the vehicle body corresponding to the bolt insertion holes formed in the base portion 82 of the front side support bracket 81 and in which screw holes are formed. One support bracket mounting boss 67 is provided on the upper side of the vehicle than the motor output shaft 11, and two support bracket mounting bosses 67 are provided on the lower side of the motor output shaft 11.

  The rear side support bracket 86 is formed in a substantially semicircular shape in the cross section orthogonal to the vehicle width direction and is recessed toward the vehicle body rear side to support the vehicle body rear side of the drive shaft 17; The two flange portions 88 each have a bolt insertion hole formed therein.

  The support bracket mounting boss 67 provided on the cover member 60 and the top of the base 82 of the front support bracket 81 are overlapped to form the fastening bolt B4 in the support bracket mounting boss 67 through the bolt insertion hole formed in the base 82 The front support bracket 81 is attached to the cover member 60 by screwing into the screw holes.

  A bearing (not shown) is press-fitted and fixed to the outer surface of a portion of the drive shaft 17 supported by the support bracket 80. The rear side support is arranged after the vehicle front side of the drive shaft 17, specifically, the front side of a portion of the drive shaft 17 whose bearing is fixed to the support portion 85 of the front side support bracket 81 attached to the cover member 60. The rear support bracket 86 is assembled by overlapping the bracket 86 from the rear side of the vehicle body and screwing the fastening bolt B5 into the screw holes 84 formed in the front support bracket 81 through the bolt insertion holes formed in the rear support bracket 86. Are attached to the front side support bracket 81. Thus, the support bracket 80 for supporting the drive shaft 17 is attached to the cover member 60.

  The drive shaft 17 is supported by the front support bracket 81 and the rear support bracket 86 of the support bracket 80, and then the front support bracket 81 of the support bracket 80 is attached to the cover member 60 to support the drive shaft 17. The bracket 80 may be attached to the cover member 60.

  In this embodiment, the mount bracket 70 is attached to the cover member 60 on the front side of the motor output shaft 11 with respect to the vehicle body, and the support bracket 80 is attached to the cover member 60 on the vehicle rear side with respect to the motor output shaft 11. The support bracket 80 is attached to one side and the other side of the cover member 60 in the front-rear direction of the vehicle than the motor output shaft 11.

  The cover member 60 is also attached with a compressor 90 for an air conditioner. The compressor 90 for the air conditioner has a compressor case 91 formed in a substantially cylindrical shape with the compressor main body for expanding the refrigerant accommodated therein.

  As shown in FIG. 5, the compressor 90 is disposed on the opposite side to the motor housing side of the cover member 60 so that the central axis 92 of the compressor case 91 extends in the longitudinal direction of the vehicle body. The cover member 60 is provided with three compressor mounting bosses 68 which extend outward in the vehicle width direction and in which screw holes are formed. One compressor mounting boss 68 is provided on the upper side of the motor output shaft 11 above the vehicle body, and two compressor mounting bosses 68 are provided on the lower side of the vehicle than the motor output shaft 11 in the longitudinal direction of the vehicle.

  The compressor case 91 extends in the vehicle width direction corresponding to the compressor mounting boss 68 provided on the cover member 60 in a state in which the cover member 60 is disposed on the opposite side to the motor housing side and forms a bolt insertion hole Three cover member mounting bosses 93 are provided.

  In the compressor 90, a compressor mounting boss 68 provided on the cover member 60 and a cover member mounting boss 93 provided on the compressor case 91 are overlapped and a bolt having a fastening bolt B6 provided on the cover member mounting boss 93 It is attached to the cover member 60 by screwing it into the screw hole formed in the compressor attachment boss 68 through the insertion hole.

  As shown in FIGS. 1 and 2, a mounting bracket 100 for mounting and supporting the cross member 4 is also attached to an axle housing 50 attached to the motor housing 40 on the opposite side to the cover member 60. In the axle housing 50, a mounting bracket 100 is attached to the upper side and the left side of the vehicle body.

  The mount bracket 100 has an axle housing side fixing portion 101 attached to the axle housing 50 and a substantially cylindrical cross member side fixing portion 102 attached to the cross member 4.

  The axle housing side fixing portion 101 is formed in a substantially reverse V-shape as viewed from the vehicle width direction. The cross member side fixing portion 102 is provided on the vehicle body upper side and the inside in the vehicle width direction of the axle housing side fixing portion 101 and is integrally formed with the axle housing side fixing portion 101.

  The axle housing side fixing portion 101 is formed with two bolt insertion holes at two end portions formed in an inverted V-shape. The axle housing 50 is provided with a mount bracket mounting portion 53 to which the axle housing side fixing portion 101 is attached by protruding to the vehicle left side on the vehicle body upper side. In the mount bracket mounting portion 53, two screw holes are formed on the front and rear sides of the motor output shaft 11, corresponding to the bolt insertion holes formed in the axle housing side fixing portion 101, respectively.

  In the mounting bracket 100, the axle housing side fixing portion 101 is superimposed on the mounting bracket mounting portion 53 provided on the axle housing 50, and the fastening bolt B7 is mounted through the bolt insertion hole formed in the axle housing side fixing portion 101 It is attached to the axle housing 50 by being screwed into a screw hole formed in the 53.

  The cross member side fixing portion 102 is formed in the same manner as the cross member side fixing portion 72 of the mount bracket 70 attached to the cover member 60, and an elastic body is fixed and attached inside a substantially cylindrical portion. There is. In the cross member 4, a concave portion recessed in a substantially trapezoidal shape in cross section from the front side of the vehicle body to the rear side of the vehicle body is formed similarly to the concave portion 45 corresponding to the mount bracket 70 in the portion where the mount bracket 100 is supported There is.

  Also in the mounting bracket 100, the mounting shaft extending in the vehicle width direction is inserted into the elastic member provided in the cross member side fixing portion 102, and the mounting shaft is formed in a substantially square pole shape and the front and rear of the vehicle body on both sides in the vehicle width direction. A bolt insertion hole extending in the direction is formed.

  The mounting shaft and the cross member 4 are formed in a state where the axle housing side fixing portion 101 of the mounting bracket 100 is attached to the axle housing 50 and the mounting shaft is inserted through the elastic body attached to the cross member side fixing portion 102 From the front side of the mounting shaft on the mounting shaft of the mounting shaft by screwing the fastening bolt B7 into the screw holes formed in the right rear surface and the left rear surface of the recess of the cross member As a result, the axle housing 50 is mounted on the cross member 4 via the mounting bracket 100.

  Thus, the power unit 30 is disposed on the lower side of the cross member 4 in the vehicle body, and the cover members 60 and the axle housing 50 provided on both sides in the vehicle width direction of the power unit 30 cross the mount brackets 70 and 100, respectively. Supported by member 4

  In the vehicle body 1, the cover member 60 is provided with a mounting bracket 70 for mounting and supporting the cross member 4 and a support bracket 80 for supporting the drive shaft 17, and a compressor 90 for air conditioner is provided on the opposite side to the motor housing side. Although attached, it is also possible to make the cover member 60 not attach the air conditioner compressor.

  FIG. 8 is a rear view showing the power unit in which the support bracket is attached to the motor housing. FIG. 8 shows a power unit 30 ′ in which a support bracket for supporting the drive shaft is attached to the motor housing 40 in place of the cover member 60 in the vehicle body 1.

  As shown in FIG. 8, when the support bracket 80 ′ supporting the drive shaft 17 ′ is attached to the motor housing 40, the wheel side constant velocity joint 19 ′ connected to the front wheel is the wheel side constant velocity joint 19 of the drive shaft 17. The differential mechanism side constant velocity joint 18 ′ provided at the same position and connected to the joint shaft 16 is disposed on the center side in the vehicle width direction with respect to the differential mechanism side constant velocity joint 18 of the drive shaft 17.

  As described above, when the support bracket 80 'is attached to the motor housing 40, the differential mechanism side constant velocity joint 18' of the drive shaft 17 'is disposed on the center side in the vehicle width direction, and the drive shaft bending angle becomes smaller. Therefore, there is a possibility that the sub frame 20 ′ disposed below the side frame 3 may interfere. In this case, although it is necessary to form the notch 20a on the vehicle body upper side in the sub-frame 20 'so as to avoid interference with the sub-frame 20', the strength and rigidity of the sub-frame 20 'may be reduced.

  In this embodiment, since the support bracket 80 for supporting the drive shaft 17 is attached to the cover member 60, the differential mechanism side constant velocity joint 18 between the joint shaft 16 and the drive shaft 17 is disposed on the front wheel side, and the drive shaft is broken. The angle can be increased, and the interference between the drive shaft 17 and the sub-frame 20 can be suppressed.

  As described above, according to the electric vehicle according to the present embodiment, the motor 10 for driving the wheels is disposed in the motor room 2 in front of the vehicle, and the motor housing 40 in which the motor 10 is disposed A cover member 60 mounted on one side in the width direction, and an axle housing 50 provided with the transaxle 15 including the power transmission mechanism 14 mounted on the other side in the vehicle width direction of the motor housing 40 are provided. A mounting bracket 70 mounts and supports the cross member 4 extending in the vehicle width direction above the motor 10 on the cover member 60, and a support bracket supporting the drive shaft 17 for the front wheel to which power is transmitted from the power transmission mechanism 14. 80 and is attached.

  Thus, in the electric vehicle in which the motor 10 for driving the wheels is disposed in the motor room 2 in front of the vehicle, the mounting bracket 70 is supported by the cover member 60 attached to the motor housing 40 in which the motor 10 is disposed. Since the bracket 80 is attached, the rigidity of the cover member 60 can be increased while suppressing an increase in weight as compared with the case where the support bracket is attached to the motor housing 40 and not attached to the cover member 60. The attachment rigidity of the cover member 60 attached to the motor housing 40 can be improved while suppressing the increase.

  Further, since the support bracket 80 is attached to the cover member 60, the joint 18 of the joint shaft 16 and the drive shaft 17 is disposed on the front wheel side as compared with the case where the support bracket is attached to the motor housing 40 You can make the corners larger. When a sub-frame 20 extending in the longitudinal direction of the vehicle along the side frames 3 below the left and right side frames 3 is disposed below the drive shaft 17, interference between the drive shaft 17 and the sub-frame 20 may be suppressed. it can.

  The mounting bracket 70 and the support bracket 80 are attached to one side and the other side of the cover member 60 in the longitudinal direction of the vehicle from the motor output shaft 11, so that the cover member 60 can be It can be reinforced in the front-rear direction.

  In addition, the compressor 90 for air conditioner is attached to the cover member 60 on the opposite side to the motor housing side, so that the cover member 60 can be further reinforced by the compressor 90 for air conditioner, and the rigidity of the cover member 60 is further enhanced. It can be enhanced.

  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 motor for driving the wheel is disposed in the motor room in front of the vehicle, the mounting rigidity of the cover member attached to the motor housing is suppressed while suppressing the increase in weight. As it can be improved, it may be suitably used in this type of electric vehicle.

Reference Signs List 1 vehicle body 2 motor room 3 side frame 4 cross member 10 motor 11 motor output shaft 14 power transmission mechanism 15 transaxle 17 17 ′ drive shaft 30 30 ′ power unit 40 motor housing 50 axle housing 60 cover member 70 mount bracket 80 , 80 'support bracket 90 compressor

Claims (3)

An electric vehicle wherein a motor as a power source for driving a wheel is disposed in a motor room in front of the vehicle so that a motor output shaft extends in the vehicle width direction,
A motor housing in which the motor is disposed;
A cover member attached to one side in the vehicle width direction of the motor housing;
A transaxle including a power transmission mechanism for transmitting the output of the motor to the front wheels is internally provided, and an axle housing mounted on the other side of the motor housing in the vehicle width direction;
A mount bracket mounted on the cover member between left and right side frames extending in the longitudinal direction of the vehicle body and mounted on and supported by a cross member extending in the vehicle width direction above the motor, and front wheels to which power is transmitted from the power transmission mechanism And a support bracket for supporting the drive shaft of the
An electric vehicle characterized by The mount bracket and the support bracket are attached to one side and the other side of the cover member in the vehicle longitudinal direction with respect to the motor output shaft.
The electric vehicle according to claim 1, A compressor for an air conditioner is attached to the cover member on the side opposite to the motor housing side.
The electric vehicle according to claim 1 or 2, wherein

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