JP5552962B2 - Electric vehicle rear structure - Google Patents

Description

The present invention relates to a vehicle rear portion structure of an electric vehicle having a motor for driving the left and right rear wheel of each independently.

  Conventionally, as in Patent Documents 1 and 2 below, an electric vehicle that drives a wheel by using a rotational driving force of a motor is known.

  In developing an electric vehicle equipped with a motor, the present inventor has made various analyzes and studies on the running performance of the vehicle such as turning stability and stability at high speed running. As a result of earnest research, the present inventor has found that the best running performance can be obtained when the motor is disposed in the rear part of the vehicle and the left and right rear wheels are independently driven.

JP 2006-213179 A JP-A-2005-112240

  By the way, when the motor for driving the rear wheels is provided in the vehicle as described above, it is necessary to firmly support the motor on the vehicle body in consideration of the driving reaction force generated when the motor is driven to rotate.

  However, in general, if the motor is to be firmly supported by the vehicle body, significant reinforcement is required on the vehicle body side, making it difficult to share specifications with other vehicle models not equipped with a motor. Occurs. As described above, it is not preferable that the specification cannot be shared with other vehicle types because it becomes disadvantageous in terms of vehicle productivity.

  In addition, suspensions are generally provided in vehicles corresponding to the respective wheels. As this suspension, for example, there is a suspension having a connecting member that connects the left and right wheels, and depending on the type of suspension, there is a suspension that moves up and down as the suspension moves up and down.

  Here, it is conceivable to provide a motor for driving the rear wheels in a vehicle provided with a suspension having a connecting member that moves up and down. However, in this case, when the connecting member moves up and down, the connecting member and a member for attaching the motor to the vehicle body may interfere with each other.

Here, looking at the above-mentioned Patent Document 1, the Patent Document 1, the suspension is not intended to have a connecting member as described above, the member and the coupling member for attaching the motor for driving the rear wheels There is no disclosure or suggestion about a configuration that avoids the interference.

  Further, in the above-mentioned Patent Document 2, the disclosure of the suspension is not disclosed, and even in the above-mentioned Patent Document 2, there is no disclosure or suggestion about the configuration for avoiding the interference between the member for attaching the motor for driving the rear wheel and the connecting member. I have to say that there is no.

  The present invention provides a vehicle rear structure of an electric vehicle capable of avoiding interference between a member for attaching the motor to the vehicle body and a connecting member of the suspension while suppressing reinforcement on the vehicle body side when the motor is attached to the vehicle body. For the purpose.

A vehicle rear structure of an electric vehicle according to the present invention includes a motor mounted on a drive shaft and independently driving left and right rear wheels, a motor mounting member for mounting the motor on a vehicle body, and the left and right rear wheels. A rear part structure of an electric vehicle comprising a connecting member that constitutes a part of a suspension that connects the two, and moves up and down as the suspension moves up and down. The suspension has a trailing arm extending substantially in the vehicle front- rear direction and passes above the movable range , and the front end of the trailing arm has the motor in the front-rear direction. It is attached to the vehicle body via a mounting member .

According to this configuration, the motor can be supported in a wider range in the vehicle front-rear direction while reliably avoiding interference between the motor mounting member for attaching the motor to the vehicle body and the connecting member. In this case, since the motor can be supported more firmly by the motor mounting member, the reinforcement on the vehicle body side can be suppressed accordingly.

Moreover , the suspension has a trailing arm extending substantially in the vehicle front-rear direction, and the front end of the trailing arm is attached to the vehicle body via the motor mounting member.

Thus, since the trailing arm is attached to the vehicle body via the motor mounting member, vibration transmitted from the road surface via the suspension can be mainly blocked by the motor mounting member. In this case, the support portion at the front end portion of the trailing arm can have only a function of supporting the trailing arm so as to be swingable. Therefore, in this case, when designing the support portion of the trailing arm front end, it is possible to design only the function of supporting the trailing arm, thus simplifying the design of the support portion. can do.

The vehicle rear structure of the electric vehicle according to the present invention also includes a motor mounted on the drive shaft for independently driving the left and right rear wheels, a motor mounting member for mounting the motor to the vehicle body, and the left and right A vehicle rear structure of an electric vehicle comprising a part of a suspension for connecting a rear wheel, and a connecting member that moves up and down as the suspension moves up and down. The suspension is disposed so as to extend in the vehicle front-rear direction passing above the movable range in the vertical direction, and the suspension includes a trailing arm extending substantially in the vehicle front-rear direction. The motor mounting member is set at the same position in the vehicle longitudinal direction as the vehicle body coupling position.

According to this configuration, the motor can be supported in a wider range in the vehicle front-rear direction while reliably avoiding interference between the motor mounting member for attaching the motor to the vehicle body and the connecting member. In this case, since the motor can be supported more firmly by the motor mounting member, the reinforcement on the vehicle body side can be suppressed accordingly.

Moreover, the suspension has a trailing arm extending substantially in the vehicle longitudinal direction, and the vehicle body coupling position of the trailing arm is set to the same position in the vehicle longitudinal direction as the vehicle body coupling position of the motor mounting member. It is.

According to this configuration, since the position in the vehicle longitudinal direction of the support portion of the trailing arm can be set further forward, the length between the support portion and the drive shaft can be set longer, and as a result, The running performance of the vehicle can be further improved.

  In one embodiment of the present invention, the position at which the trailing arm is connected to the motor mounting member is set near the rear of the vehicle body connecting position of the motor mounting member.

Paying attention to the length between the supporting part of the trailing arm and the drive shaft of the rear wheel, when the suspension is moved up and down by the same height (the trailing arm swings up and down), the length from the drive shaft When the length is set to be shorter, the fluctuation range of the drive shaft in the vehicle front-rear direction , that is , the change in the wheelbase length is larger than when the length from the drive shaft is set to be longer.

  In general, in consideration of vehicle runnability, it is preferable that the wheel base length change with the vertical movement of the suspension (the vertical swing of the trailing arm) is smaller. It is preferable to set the length between the support portion and the drive shaft as long as possible.

According to this configuration, the position at which the trailing arm is coupled to the motor mounting member is set near the rear of the vehicle body coupling position of the motor mounting member, so that the supporting portion of the trailing arm in the vehicle front-rear direction is set. The position can be set as forward as possible. Therefore, this case can be set longer in length between the drive shaft the supporting part, as a result, Ru can improve the running performance of the vehicle.

  In one embodiment of the present invention, the motor mounting member is connected to a vehicle body by being connected to a pair of left and right rear side frames extending in the vehicle front-rear direction, and the front portion of the motor mounting member is It is connected to the rear side frame at a position ahead of the vehicle relative to the connecting member.

According to this configuration, the motor can be supported in a wider range in the vehicle front-rear direction , whereby the motor can be supported more firmly.

  In one embodiment of the present invention, the rear end portion of the motor mounting member is connected to a cross member extending in the vehicle width direction via a damper structure.

According to this configuration, the damper structure can mitigate the influence of the vertical vibration of the motor having a certain weight on the vehicle body side.

  According to the present invention, the motor can be supported in a wider range in the vehicle front-rear direction while reliably avoiding interference between the motor mounting member for attaching the motor to the vehicle body and the connecting member. In this case, since the motor can be more firmly supported by the motor mounting member, the reinforcement on the vehicle body side can be suppressed accordingly.

The top view which shows the vehicle rear part structure which concerns on embodiment of this invention. The top view which shows a rear suspension. The side view of FIG. The exploded perspective view of a motor mounting member, a rubber bush, a damper member, and a trailing arm. It exploded perspective view of the motor and the extension member. The perspective view which shows the state which connected the motor to the motor mounting member. Explanatory drawing for demonstrating the relationship between the length between the support part of a trailing arm and the drive shaft of a rear-wheel, and the driveability of a vehicle. The top view which shows the vehicle rear part structure which concerns on other embodiment of this invention. FIG. 9 is a sectional view taken along line AA in FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing a vehicle rear structure according to an embodiment of the present invention, FIG. 2 is a plan view showing a rear suspension, and FIG. 3 is a side view of FIG. In the drawing, the arrow (F) indicates the front of the vehicle body, and the arrow (R) indicates the rear of the vehicle body.

  As shown in FIGS. 1 to 3, in this embodiment, a pair of left and right rear side frames 1, 1 constituting a vehicle body side frame is a vehicle on the inner side of left and right rear wheels W, W indicated by a two-dot chain line in the drawings. Between the rear side frames 1, 1, cross members 2, 3 constituting a vehicle body side frame are provided between the rear side frames 1, 1 so as to extend in the vehicle width direction. Yes.

  Further, a rear suspension 4 for connecting the left and right rear wheels W, W is disposed on the inner side of the vehicle. The rear suspension 4 is a so-called torsion beam suspension. As shown in FIGS. 1 and 2, a pair of left and right trailing arms 41 extending mainly in the vehicle front-rear direction and a torsion beam 42 extending in the vehicle width direction are provided. have. The rear suspension 4 includes a spring seat 43 disposed at a corner portion between the rear portion of the trailing arm 41 and the vehicle width direction end portion of the torsion beam 42, and a coil spring attached to the spring seat 43. 44 and a tubular damper 45 attached to the rear end of the spring seat 43.

  Among these, the trailing arm 41 has a front end attached to the vehicle body via a bush 46 and can swing up and down around the front end. Further, the trailing arm 41 has a bracket 47 at its rear end, and the rear wheel W is rotatably supported via the bracket 47.

Further, the torsion beam 42, as shown in FIG. 3, has an inverted U-shaped cross section the lower side is open over the vehicle width direction, wheels W after the right and left through the trailing arm 41 and the like, W Are connected. In FIG. 3, for convenience of illustration, it is omitted part of the configuration of the rear suspension 4.

  Moreover, in this embodiment, as shown in FIGS. 1-3, the motors 5 and 5 are arrange | positioned corresponding to the left and right rear wheels W and W, respectively. The left motor 5 is attached to the drive shaft 6 (on the drive shaft) of the left rear wheel W and the right motor 5 is connected to the right rear wheel W in order to drive the left and right rear wheels W independently. Attached to the drive shaft 6.

Further, in this embodiment, mounting the motors 5 and 5 are connected to a common motor mounting member 7, the vehicle body frame such rear side frames 1 and cross member 2 through the motor mounting member 7 It has been.

  As shown in FIG. 1, the motor mounting member 7 has a substantially Y shape in plan view, a pair of left and right front extending portions 71 and 71 at the front portion, and a rear extending portion 72 at the substantially central portion in the vehicle width direction at the rear portion. And extending in the vehicle front-rear direction and the vehicle width direction.

  In the motor mounting member 7, the front extending portion 71 is connected to the lower surface portion of the rear side frame 1, 1 as shown in FIGS. 1 and 3, while the rear extending portion 72 is connected to the rear cross member 3. It is connected to the lower surface.

  A cylindrical rubber bush 8 is attached to the front end portion of the front extension portion 71, and the rubber bush 8 is fastened to the bottom surface portion of the rear side frame 1 by a fastening member 9 made of bolts, nuts and the like. ing. Thereby, the front portion of the motor mounting member 7 is elastically supported by the rear side frame 1 via the rubber bush 8.

  On the other hand, a damper member 10 such as a hydraulic damper or a gas damper filled with fluid in a cylinder is attached to the tip of the rear extension 72, and this damper member 10 is a fastening member made of bolts, nuts and the like. 11 is fastened to the bottom surface of the cross member 3. Thereby, the rear part of the motor mounting member 7 is connected to the cross member 3 via the damper member 10, and the damper member 10 can absorb the vertical vibrations of the motors 5, 5 at the rear part of the motor mounting member 7. It is possible.

  When the motors 5 and 5 are attached to the vehicle body via the motor mounting member 7, the front cross member 2 is disposed in front of the motors 5 and 5, while the rear cross member 3 is the motor. 5 and 5 are disposed behind. The length L1 from the center position in the front-rear direction of the motors 5 and 5 to the position where the front part of the motor mounting member 7 is connected to the rear side frames 1 and 1 and the rear part of the motor mounting member 7 to the cross member 3 Comparing the length L2 to the connected position, the length L1 is longer as shown in FIGS.

  Further, the relationship between the rear suspension 4 and the motor mounting member 7 will be described. The front portion of the motor mounting member 7 is connected to the rear side frames 1 and 1 at a position ahead of the vehicle relative to the torsion beam 42 of the rear suspension 4.

Here, the torsion beam 42 is a member that moves up and down with the position indicated by the two-dot chain line in FIG. 3 as the upper limit as the rear suspension 4 moves up and down. In this embodiment, the motor mounting member 7 is shown in FIG. As shown in FIG. 5 , the upper limit position of the torsion beam 42 in the up-and-down movement, that is, the upper to-be-movable range is arranged so as to extend in the vehicle front-rear direction.

Also, the rear suspension 4, the front end of the trailing arm 41 is coupled to the front extending portion 71 of the motor mounting member 7 through a bush 46 and trailing arm bracket 12, by this, the trailing arm Reference numeral 41 is attached to the rear side frame 1 on the vehicle body side via the motor mounting member 7.

Then, the position of the trailing arm 41 is connected to the motor mounting member 7, FIG. 1, the rear vicinity of the rubber bushing 8 as shown in FIG. 3, Chi words, the front extending portion 71 is connected to the rear side frame 1 It is set near the rear of the position.

Next, with further reference to FIGS. 4 to 6, the structure of the motor mounting member 7, the structure for mounting a motor 5,5 to the vehicle body via the and the motor mounting member 7 will be described in detail.
4, the motor mounting member 7, the rubber bushes 8, the damper member 10 is an exploded perspective view of and the trailing arm 41, FIG. 5 is an exploded motors 5,5 and the extension member 24, 25 FIG. 6 is a perspective view illustrating a state where the motors 5 and 5 are connected to the motor mounting member 7.

Motor mounting member 7, FIG. 1, as shown in FIGS. 3 to 6, perforated at its edges has a vertical wall 73 extending downwardly, a substantially U-shaped cross section an open bottom doing. And between the vertical wall parts 73 and 73, the 1st-4th fixing plates 20-23 which connect this vertical wall parts 73 and 73, and the extending member extended below from the motor mounting member 7 24 and 25 are provided.

As shown in FIG. 4, the first fixed plate 20 is disposed at the front end portion of the front extension portion 71 and connects the lower end portions of the vertical wall portions 73 and 73. The first fixed plate 20 has a recess 20a having the same shape as the arc-shaped recess 71a formed on the upper surface of the front end portion of the front extension 71, and the rubber bush 8 described above is fitted into the recess 20a.

  Here, a bracket 26 is provided on the rubber bush 8 side, and this bracket 26 can be inserted between the top surface of the front end portion of the front extension portion 71 and the first fixed plate 20. And the rubber bush 8 can be fixed to the front-end | tip part of the front extension part 71 by inserting the bracket 26 between the front-end | tip part of the front extension part 71, and the 1st fixing plate 20, and connecting these. It has become.

  Further, the trailing arm bracket 12 described above is attached to the rear portion of the front end portion of the front extension portion 71, and the front end of the trailing arm 41 is connected to the motor mounting member 7 via the bush 46 and the trailing arm bracket 12. Connected.

The second, third fixing plate 21 and 22, FIG. 1, as shown in FIG. 4, is disposed rearwardly extending portion 72 connects the lower ends of the vertical wall portions 73, 73. Among these, the 2nd fixed plate 21 is arrange | positioned in the rear-end part of the back extension part 72, and is the same shape as the circular arc-shaped recess 72a formed in the upper surface of the front-end | tip part of the back extension part 72. 21a. And the damper member 10 mentioned above is engage | inserted by this dent 21a.

  Here, a bracket 27 is provided on the damper member 10 side, and the bracket 27 can be inserted between the upper surface of the distal end portion of the rearward extending portion 72 and the second fixed plate 21. Then, by inserting the bracket 27 between the distal end portion of the rearward extension portion 72 and the second fixing plate 21 and connecting them, the damper member 10 can be fixed to the distal end portion of the rearward extension portion 72. It has become.

The third fixed plate 22 extends in the vehicle width direction in front of the second fixed plate 21 and connects the vertical wall portions 73 and 73 to each other. As shown in FIGS. 1 and 4 to 6, the fourth fixed plate 23 extends in the vehicle width direction at the vehicle longitudinal direction intermediate portion of the motor mounting member 7, and the vertical wall portions 73, 73 are connected to each other. Connected. And between the 3rd fixed plate 22 mentioned above and the 4th fixed plate 23, the plate-shaped three extending members 24, 25, 25 extended below from the upper surface part of the motor mounting member 7 are set to a vehicle width direction. The front and rear ends thereof are fixed to the third and fourth fixing plates 23 and 24, respectively.

1 and 4 to 6, the extending member 24 is disposed at the center in the vehicle width direction of the rear extending portion 72 of the motor mounting member 7, and a part thereof includes a plurality of members. A fastening hole 24a is formed.

  Further, the two extending members 25, 25 are arranged so as to be symmetric with respect to the extending member 24, and an arc-shaped recess 25 a formed in accordance with the shape of the motor 5 at the lower end portion. And a plurality of fastening holes 25b are formed in the vicinity of the recess 25a.

  Incidentally, the motors 5 and 5 are provided with first and second flanges 28 and 29 having a plurality of fastening holes 28a and 29a, respectively, as shown in FIG. 1, FIG. 3, FIG. 5, and FIG. Yes. The first flange 28 is disposed at the inner end in the vehicle width direction of the motor 5, while the second flange 29 is disposed at a position spaced from the first flange 28 to the outer side in the vehicle width direction.

When connecting the motor 5 to the motor mounting member 7, first , the inner ends in the vehicle width direction of the motors 5 , 5 are brought into contact with both surfaces of the extending member 24 without gaps, and positioning in the vehicle width direction is performed. Then, the motor 5 is fitted to the arc-shaped recess 25a of the extending member 25, for positioning in the vertical direction and the vehicle longitudinal direction of the motor 5.

  At this time, the position of the fastening hole 24a of the extending member 24 and the position of the fastening hole 28a of the first flange 28 coincide with each other, and the extending member 25 and the second flange 29 come into contact with each other without any gap, thereby extending the extending member 25. The position of the fastening hole 25a and the position of the fastening hole 29a of the second flange 29 coincide with each other.

  Therefore, as shown in FIGS. 1, 3, and 6, the extending member 24 and the left and right first flanges 28 and 28 are fastened in a triple manner by a fastening member 30 made of bolts, nuts, and the like, and further extended. The member 25 and the second flange 29 are fastened by a fastening member 31 made of a bolt, a nut or the like.

In the present embodiment, as described above, the left and right motors 5 and 5 are connected to the common motor mounting member 7 by fastening the first and second flanges 28 and 29 to the extending members 24 and 25, respectively. Can be done. Then, the motor mounting member 7, as shown in FIG. 1, FIG. 3, by connecting to the vehicle body frame such rear side frames 1 and the cross member 3 through the rubber bushes 8 and the damper member 10, the motor 5 motor mounting It can be attached to the vehicle body via the member 7.

  As described above, in this embodiment, the motors 5 and 5 for independently driving the left and right rear wheels W and W are provided, and the motor mounting member 7 for attaching the motors 5 and 5 to the vehicle body is provided. The motor mounting member 7 has a rear portion connected to the cross member 2 and a front portion connected to the pair of left and right rear side frames 1 and 1 to attach the motors 5 and 5 to the vehicle body.

Thus, in the present embodiment, the left and right rear wheels W, a motor 5 and 5 for driving W to independently can be supported in a wide range of vehicle longitudinal direction and vehicle width direction by the motor mounting member 7 Even if the driving reaction force is generated in various directions along with the rotational driving of the motors 5 and 5, this can be received by the motor mounting member 7 on the surface. Therefore, the motors 5 and 5 can be firmly supported against the driving reaction force.

  Further, since the motor mounting member 7 is connected to the rear side frame 1 at a position in front of the vehicle rather than the torsion beam 42 of the rear suspension 4, the motors 5 and 5 can be supported in a wider range in the vehicle front-rear direction. For this reason, the motors 5 and 5 can be supported more firmly.

Further, as shown in FIG. 3, the motor mounting member 7 is disposed so as to extend in the vehicle front-rear direction passing above the movable range in the vertical direction of the torsion beam 42, thereby attaching the motor 5 to the vehicle body. The motors 5 and 5 can be supported in a wider range in the vehicle front-rear direction while reliably avoiding interference between the motor mounting member 7 and the torsion beam 42. In this case, since the motors 5 and 5 can be more firmly supported by the motor mounting member 7, reinforcement on the vehicle body side can be suppressed accordingly. In this way, by suppressing the reinforcement on the vehicle body side as much as possible, it is easy to share specifications with other vehicle types not equipped with the motor 5, and as a result, there is an advantage that the productivity of the vehicle can be secured.

  By the way, with respect to the trailing arm 41 of the rear suspension 4, the bush 46 at the front end is generally connected directly to the vehicle body conventionally, and vibration transmitted from the road surface via the rear suspension 4 is transmitted to the vehicle body. The function of blocking so that the trailing arm 41 is not transmitted and the function of supporting the trailing arm 41 so as to be swingable are combined. Therefore, the design of the bush 46 has been extremely difficult due to the requirement that the two functions described above must be compatible.

  On the other hand, in the present embodiment, the trailing arm 41 is attached to the vehicle body via the motor mounting member 7, and therefore vibrations transmitted from the road surface via the rear suspension 4 are mainly The motor mounting member 7 (more specifically, the rubber bushing 8 that attaches the motor mounting member 7 to the vehicle body) can be blocked. For this reason, in this embodiment, it becomes possible to give the bush 46 only the function of supporting the trailing arm 41 in a swingable manner. Therefore, in this case, when the bush 46 is designed, it is possible to perform the design considering only the function of supporting the trailing arm 41, and thus there is an advantage that the design of the bush 46 can be simplified.

  Further, when attention is paid to the length between the support portion of the trailing arm 41 constituted by the bush 46 and the drive shaft 6 of the rear wheel W, for example, as shown in the bushes 46 ′ and 46 ″ shown in FIG. When the length from the shaft 6 is different, when the trailing arms 41 'and 41 "are swung up and down by the same height, the length from the drive shaft 6 should be set shorter (see bush 46"). It can be seen that the fluctuation range of the drive shaft 6 in the longitudinal direction of the vehicle, that is, the change in the wheel base length is larger by δ than when the length from the drive shaft 6 is set longer (see the bush 46 ′).

  In general, in consideration of the running performance of the vehicle, it is preferable that the change in the wheel base length accompanying the swinging of the trailing arm 41 in the vertical direction is smaller. It is preferable to set the length between the drive shaft 6 as long as possible.

  Therefore, in the present embodiment, the bracket 12 is provided near the rear of the vehicle body connection position of the front portion of the motor mounting member 7, that is, the position where the front portion of the motor mounting member 7 is connected to the rear side frame 1, thereby The position of the bush 46 in the vehicle front-rear direction is set as front as possible. Therefore, in this case, the length between the bush 46 and the drive shaft 6 can be set long, and as a result, the running performance of the vehicle can be improved.

Also, the rear portion of the vehicle body connecting position of the motor mounting device 7, Chi words, the damper member 10 is provided at a position where the rear of the motor mounting member 7 is connected to the cross member 3, the connecting portion, the vertical vibration of the motor 5 By adopting a damper structure that can absorb, the influence of the vertical vibrations of the motors 5 and 5 having a certain weight on the vehicle body side can be mitigated by the damper structure.

  Further, in particular, a vibration coupling input to the rear portion of the motor mounting member 7 is made by using a damper structure at the rear connecting portion of the motor mounting member 7 in which the length L2 from the center position of the motor 5 in the vehicle longitudinal direction is set short. Can be effectively reduced by the damper structure located close to the motor 5.

  In addition, by fixing the motors 5 and 5 in the vehicle width direction by the extending member 24 disposed between the motors 5 and 5, the motors 5 and 5 can be moved not only in the vertical direction but also in the vehicle width direction. Can also be supported stably.

By the way, in the above-described embodiment, the position where the trailing arm 41 is connected to the motor mounting member 7 is set near the rear of the position where the motor mounting member 7 is connected to the rear side frame 1. As shown , the vehicle body connection position of the trailing arm 141 of the rear suspension 104 may be set at the same position as the vehicle body connection position of the motor mounting member 107 in the vehicle longitudinal direction. 8 is a plan view showing a vehicle rear structure according to another embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line AA in FIG. In FIG. 8 and FIG. 9, the same components as those in the first embodiment shown in FIG. 1 to FIG.

In the present embodiment, similarly to the first embodiment, a rear suspension 104 having a trailing arm 141 and the torsion beam 42 such as a motor mounting member 107 having a forward extending portion 171 and rearwardly extending portions 172 Yes. The bush 146 at the front end of the trailing arm 141 and the rubber bush 108 that connects the front of the front extension 171 to the vehicle body are fastened to the bracket 112 by a common fastening member 109 as shown in FIG. are, by the bracket 112 is coupled to the lower surface of the rear side frame 1, the front portion of the trailing arm 141 and the motor mounting member 107 is attached to the vehicle body.

In the present embodiment, the position of the bushing 146, Chi words, the vehicle body coupling position of the trailing arm 141, and the vehicle body coupling position of the front of the motor mounting member 107, the vehicle as shown in FIG. 8, FIG. 9 The same position is set in the front-rear direction. In this case, since the position of the bush 146 in the vehicle front-rear direction can be set further forward, the length between the bush 146 and the drive shaft 6 can be set longer, and as a result, the running performance of the vehicle is further improved. There is an advantage that can be made.

  Although not shown in FIG. 8, in this embodiment as well as the extending member 73 of the first embodiment, an extending member for fixing the left and right motors 5, 5 in the vehicle width direction is provided. preferable.

In correspondence between the configuration of the present invention and the above-described embodiment,
The drive shaft of the present invention corresponds to the drive shaft 6,
Similarly,
The connecting member corresponds to the torsion beam 42,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Rear side frame 2, 3 ... Cross member 4, 104 ... Rear suspension 5 ... Motor 6 ... Drive shaft (drive shaft)
7, 107 ... Motor mounting member 10 ... Damper members 41, 141 ... Trailing arm 42 ... Torsion beam (connection member)

Claims (5)

A motor mounted on the drive shaft and independently driving the left and right rear wheels;
A motor mounting member for attaching the motor to the vehicle body;
A vehicle rear structure of an electric vehicle comprising a part of a suspension for connecting the left and right rear wheels, and a connecting member that moves up and down as the suspension moves up and down,
The motor mounting member is disposed so as to extend in the vehicle front-rear direction passing above the movable range in the vertical direction of the connecting member ,
The suspension has a trailing arm extending substantially in the vehicle longitudinal direction,
The front end of the trailing arm is attached to the vehicle body via the motor mounting member . A motor mounted on the drive shaft and independently driving the left and right rear wheels;
A motor mounting member for attaching the motor to the vehicle body;
A vehicle rear structure of an electric vehicle comprising a part of a suspension for connecting the left and right rear wheels, and a connecting member that moves up and down as the suspension moves up and down,
The motor mounting member is disposed so as to extend in the vehicle front-rear direction passing above the movable range in the vertical direction of the connecting member,
The suspension has a trailing arm extending substantially in the vehicle longitudinal direction,
The body connection position of the trailing arm is set to the same position in the vehicle longitudinal direction as the vehicle body connection position of the motor mounting member.
Electric vehicle rear structure. The position where the trailing arm is coupled to the motor mounting member, the vehicle rear structure for an electric vehicle according to claim 1, wherein the set behind the vicinity of the vehicle body connecting position of the motor mounting member. The motor mounting member is attached to the vehicle body by being connected to a pair of left and right rear side frames extending in the vehicle longitudinal direction,
The vehicle rear portion structure for an electric vehicle according to any one of claims 1 to 3, wherein a front portion of the motor mounting member is connected to the rear side frame at a position ahead of the vehicle relative to the connecting member . Rear end of the motor mounting member, the vehicle for an electric vehicle according to what Re or claim <br/> claims 1-4 coupled to a cross member extending in the vehicle width direction via the damper structure rear structure.

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