JP2011194911A - Battery and motor mounting structure of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery and motor mounting structure of an electric vehicle reducing the yaw inertia moment, and dispersing the torque reaction of a motor.SOLUTION: The battery and motor mounting structure of the electric vehicle includes: a motor supporting member 69 supporting a motor 5 so as to be disposed between wheel axles FA, RA of front wheels 7, 9 and rear wheels 65, 67 and turn a rotary shaft 5a in a vehicle fore-and-aft direction; and a battery supporting member 71 disposed behind the motor supporting member 69, to which the motor supporting member 69 is coupled, and supporting a battery 3.

Description

  The present invention relates to a battery and a motor mounting structure of an electric vehicle including a battery and a motor that is supplied with electric power from the battery and drives driving wheels.

  In a conventional electric vehicle, a drive motor unit composed of a drive motor and a drive gear is attached to a suspension member disposed in a lower part of a motor room via front and rear motor mounts, while an air compressor is driven. There is one which is disposed obliquely above the front of the motor unit and above and ahead of the front motor mount (see, for example, Patent Document 1).

JP 2004-161260 A

  By the way, in a gasoline engine vehicle, a large engine and a transmission are arranged adjacent to each other, so the degree of freedom of the layout of the drive system is low. In an electric vehicle, there is no engine and a transmission, and it is not necessary to arrange them adjacent to each other. And the freedom of motor layout is high.

  Therefore, as a result of intensive studies on the layout of the battery and the motor, the inventors have developed a mounting structure for the battery and the motor that reduces the yaw moment of inertia and distributes the torque reaction force of the motor.

  The present invention has been made in view of such a point, and the problem is that a battery and a motor of an electric vehicle including a battery and a motor that is supplied with electric power from the battery and drives driving wheels. In the mounting structure, it is to reduce the yaw moment of inertia and to distribute the torque reaction force of the motor.

  A first aspect of the present invention is a battery and motor mounting structure for an electric vehicle comprising a battery and a motor that is supplied with electric power from the battery and drives a drive wheel. The motor is a front wheel and a rear wheel. A motor support member that is disposed between the shafts and supports the rotating shaft in a vehicle front-rear direction, and a battery that is disposed behind the motor support member and is connected to the motor support member to support the battery. And a support member.

  According to this, since the relatively heavy motor is disposed between the wheel shafts of the front wheels and the rear wheels, the yaw moment of inertia can be reduced.

  Further, since the motor support member is connected to the battery support member, the torque reaction force of the motor can be dispersed.

  As described above, the yaw moment of inertia can be reduced and the torque reaction force of the motor can be dispersed.

  According to a second aspect of the present invention, in the first aspect, a floor tunnel is formed at a vehicle width direction center portion of the floor panel so as to extend in the vehicle front-rear direction and bulge upward. It is arranged in a floor tunnel.

  According to this, since the motor is arranged in the floor tunnel, the space in the floor tunnel can be used effectively.

  According to a third aspect, in the second aspect, the rotation shaft of the motor is connected to a front wheel as the driving wheel via a differential, and the differential is located behind the front end of the front wheel. And it is arrange | positioned ahead of the vehicle of the said motor, It is characterized by the above-mentioned.

  According to this, since the relatively heavy differential is arranged behind the front of the front wheel and ahead of the motor, the yaw moment of inertia can be further reduced.

  In a fourth aspect based on the third aspect, the motor support member supports the differential in addition to the motor.

  According to this, since the motor support member supports the differential in addition to the motor, the motor and the differential can be stably supported by the motor support member.

  In a fourth aspect based on the fourth aspect, the motor support member is provided on the front suspension cross member that supports the differential, and on the front suspension cross member so as to extend rearward from the rear edge of the vehicle. An extension for supporting the motor, and the extension is connected to the battery support member.

  According to this, the motor support member has a front suspension cross member that supports the differential, and an extension portion that is provided on the front suspension cross member so as to extend rearward from the rear edge of the vehicle and supports the motor. Yes. That is, the motor is supported by a front suspension cross member attached to the vehicle body with a long span. Therefore, the motor can be supported by a wide surface, and the torque reaction force of the motor can be further dispersed.

  According to a sixth aspect, in the third aspect, the motor is spaced apart from the differential behind the vehicle, and a rotating shaft is coupled to the differential via a propeller shaft. It is.

  According to this, since the motor is spaced apart from the differential behind the vehicle and the rotating shaft is connected to the differential via the propeller shaft, the motor can be arranged at an arbitrary position in the floor tunnel.

  A seventh invention is characterized in that, in any one of the first to sixth inventions, the motor is disposed so that at least a part thereof is located behind the dash panel in the vehicle.

  According to this, since the motor is arranged so that at least a part thereof is located behind the dash panel in the vehicle, a space can be made in the vehicle front space in the dash panel.

  The eighth invention is characterized in that, in any one of the first to seventh inventions, a storage portion is provided in front of the motor relative to the motor.

  According to this, since the storage unit is provided in front of the vehicle relative to the motor, the convenience of the storage unit during rear parking can be improved.

  In particular, in the seventh aspect of the invention, the storage portion can be provided in a space where the dash panel has a space in front of the vehicle.

  According to a ninth invention, in any one of the first to eighth inventions, the motor support member is connected to the battery support member so as to be swingable in the vertical direction. .

  By the way, since the motor is arranged so that the rotation shaft thereof faces in the vehicle front-rear direction, the rotation direction of the motor is the vehicle width direction (vertical direction), and the torque reaction force of the motor is transmitted to the motor support member. The motor support member tries to vibrate in the vertical direction.

  Here, according to the present invention, since the motor support member is connected to the battery support member so as to be swingable in the vertical direction, the motor support member can be allowed to vibrate in the vertical direction.

  In particular, in the fifth aspect of the invention, in addition to the torque reaction force of the motor, vibration from the front wheels is transmitted to the motor support member, so that the motor support member tends to vibrate further in the vertical direction.

  Here, according to the present invention, as described above, the motor support member can be allowed to vibrate in the vertical direction.

  A tenth aspect of the invention is characterized in that, in any one of the first to ninth aspects of the invention, the motor is disposed such that a rotation shaft thereof is positioned below the wheel shaft. .

  According to this, since the motor is arranged so that the rotation shaft is positioned below the wheel shaft, the center of gravity can be lowered.

  According to the present invention, since a relatively heavy motor is disposed between the wheel shafts of the front wheel and the rear wheel, the yaw moment of inertia can be reduced, and the motor support member is connected to the battery support member. As a result, the torque reaction force of the motor can be dispersed. Thus, the yaw moment of inertia can be reduced and the torque reaction force of the motor can be dispersed.

1 is a schematic plan view showing an overall structure of an electric vehicle according to an embodiment of the present invention. It is a schematic side view which shows the whole structure of an electric vehicle. It is a schematic plan view which shows the mounting structure of a battery and a motor. It is a schematic perspective view which shows the mounting structure of a battery and a motor. It is a schematic perspective view which shows the attachment structure of a battery support member, (a) is a figure which shows the state which attached the attachment member, (b) is a figure which shows the state which removed the attachment member. It is a schematic perspective view which shows the support structure of a steering gear box. It is a schematic perspective view which shows the attachment structure of a motor and a differential gear. It is a figure which shows the modification of the connection structure of a motor and a differential gear, (a) is a schematic side view, (b) is a schematic plan view. It is a schematic sectional drawing which shows the modification of the connection structure of a motor support member and a battery support member.

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

-Configuration of electric vehicle drive system-
First, the configuration of the drive system of the electric vehicle according to the embodiment of the present invention will be described. The electric vehicle (hereinafter, also referred to as a vehicle) 1 is a battery-powered electric device that supplies electric power of a battery 3 that is charged by external power from an external power source such as a household power source to drive a driving wheel by supplying the motor 5 with electric power. It is an automobile (see FIG. 1 etc.). The vehicle 1 is a compact car (for example, a commuter car) having a short overall length, in which many parts of the vehicle body are shared with a conventional gasoline engine car.

  The battery 3 is connected to the motor 5 via an inverter (not shown), and is charged with external power and regenerative power from the motor 5. The battery 3 is driven by supplying the charging power to the motor 5.

  The inverter includes an AC-DC converter that converts AC power into DC power and a DC-AC converter that converts DC power into AC power, and performs transmission and reception of power between the battery 3 and the motor 5. Specifically, when the battery 3 is charged with regenerative power from the motor 5, AC power from the motor 5 is converted into DC power by an AC-DC converter and supplied to the battery 3. On the other hand, when the power of the battery 3 is supplied to the motor 5, the DC power from the battery 3 is converted into AC power by the DC-AC converter and supplied to the motor 5.

  The motor 5 has a rotor (not shown), a stator (not shown), and a rotating shaft (output shaft) 5a. The rotating shaft 5a is provided with differential gears on left and right front wheels 7 and 9 as drive wheels. (Hereinafter referred to as differential) 11 and the left and right drive shafts 13 and 15 are connected. The motor 5 is supplied with electric power from the battery 3 and drives the front wheels 7 and 9.

  The differential 11 distributes the power of the motor 5 to the front wheels 7 and 9 while absorbing the difference between the inner wheels (the difference in speed between the inner and outer front wheels 7 and 9) when the vehicle 1 turns a curve. ing. The differential 11 also has a function of finally reducing the rotational speed of the motor 5 and transmitting the power of the motor 5 to the front wheels 7 and 9.

-Electric vehicle battery and motor mounting structure-
Next, the vehicle body structure of the electric vehicle 1 will be described. 1 is a schematic plan view showing the overall structure of the electric vehicle, FIG. 2 is a schematic side view showing the overall structure of the electric vehicle, FIG. 3 is a schematic plan view showing the mounting structure of the battery and the motor, and FIG. 5 is a schematic perspective view showing the mounting structure of the battery support member, FIG. 6 is a schematic perspective view showing the support structure of the steering gear box, and FIG. 7 shows the mounting structure of the motor and the differential gear. It is a schematic perspective view. In these figures, illustration of members is omitted or simplified for the sake of clarity.

  A front chamber 21 as a vehicle front space of the dash panel 17, which is partitioned from the vehicle compartment 19 by the dash panel 17, is provided at the front of the vehicle 1. Left and right front side frames 23 and 25 are disposed on both sides of the front chamber 21 in the vehicle width direction so as to extend in the vehicle front-rear direction. Each of the front side frames 23 and 25 includes first horizontal portions 23a and 25a that extend in the vehicle front-rear direction in front of the dash panel 17, and an inclination of the dash panel 17 that will be described later from the rear ends of the first horizontal portions 23a and 25a. Inclined portions 23b and 25b that extend obliquely downward and rearward along the front surface of the wall portion 17a, and the rear of the vehicle along the lower surface of the floor panel 27 that forms the bottom surface of the passenger compartment 19 from the rear ends of the inclined portions 23b and 25b. 2nd horizontal part 23c, 25c extended to.

  The dash panel 17 includes an inclined wall portion 17a that extends obliquely upward and forward from the front end of the floor panel 27, and a vertical wall portion 17b that extends upward from the upper end of the inclined wall portion 17a. On the front part of the floor panel 27, a front seat 29 is provided in which a driver's seat and a passenger seat are arranged at intervals in the vehicle width direction. On both sides of the floor panel 27 in the vehicle width direction, left and right side sills 31 and 33 are provided so as to extend in the vehicle front-rear direction beside the passenger compartment 19 (under the door). The front end portions of the side sills 31 and 33 are connected to the second horizontal portions 23c and 25c of the front side frames 23 and 25, respectively. On the lower surface of the floor panel 27, left and right B frames 35 and 37 having a hat-shaped cross section are provided so as to extend in the vehicle front-rear direction inside the side sills 31 and 33 in the vehicle width direction. The front ends of the B frames 35 and 37 are connected to the rear ends of the second horizontal portions 23c and 25c of the front side frames 23 and 25, respectively, while the rear ends thereof are No. 3 cross members 45 described later. It is connected to. A floor tunnel 27a is formed at the center of the floor panel 27 in the vehicle width direction so as to bulge upward. The floor tunnel 27a extends from the dash panel 17 to the rear of the vehicle 19 between the B frames 35 and 37 and reaches a kick-up portion 27b described later.

  A kick-up portion 27b is formed at the center of the floor panel 27 in the front-rear direction of the vehicle so as to rise upward, and a rear floor panel 27c is formed so as to extend rearward from the upper end of the kick-up portion 27b. Has been. A bench-type rear seat 39 is provided on the front portion of the rear floor panel 27c. Left and right rear side frames 41 and 43 are provided on the lower surfaces of both ends in the vehicle width direction of the rear floor panel 27c so as to extend in the vehicle front-rear direction. Each of the rear side frames 41 and 43 has inclined portions 41a and 43a that are inclined upward as it goes rearward of the vehicle, and horizontal portions 41b and 43b that extend rearward from the rear ends of the inclined portions 41a and 43a. . The front end portions of the inclined portions 41 a and 43 a are connected to the rear end portions of the side sills 31 and 33.

  A No. 3 cross member 45 extending in the vehicle width direction below the front end portion of the rear floor panel 27c and connected to the front end portions of the inclined portions 41a and 43a of the rear side frames 41 and 43 is provided on the rear surface of the kick-up portion 27b. Is provided. On the lower surface of the vehicle front-rear direction central portion of the rear floor panel 27c, the vehicle extends in the vehicle width direction behind the No. 3 cross member 45, and the vehicle front-rear direction center portions of the rear side frames 41, 43 (inclinations in the rear side frames 41, 43). A No. 4 cross member 47 having a hat-shaped cross section is provided which is connected to the portions 41a and 43a and the horizontal portions 41b and 43b). The No. 4 cross member 47 has a lower height position than the No. 3 cross member 45.

  Next, the mounting structure of the battery 3 and the motor 5 of the electric vehicle 1 will be described. Below the rear ends of the first horizontal portions 23a and 25a of the front side frames 23 and 25 and the inclined portions 23b and 25b, they extend in the vehicle width direction and are connected and fixed to the rear end portions of the inclined portions 23b and 25b. A front suspension cross member 49 is provided. The front suspension cross member 49 includes a U-shaped main body portion 49a arranged in the vehicle width direction central portion of the vehicle 1 in plan view and left and right lower arm support provided on both sides of the main body portion 49a in the vehicle width direction. Part 49b, 49c. The lower arms 51 and 53 of the front suspension connected to the front wheels 7 and 9 are supported by the lower arm support portions 49b and 49c.

  The main body portion 49a includes left and right side portions 49d and 49e extending in the vehicle front-rear direction, and a rear portion 49f extending in the vehicle width direction and coupled to the rear portions of the side portions 49d and 49e. A portion partitioned by the side portions 49d and 49e and the rear portion 49f constitutes a space portion 49g.

  On the upper surface of the rear portion 49f, a first concave portion 49h having a width smaller than that of the space portion 49g and a second concave portion 49i continuous to the rear of the vehicle in the first concave portion 49h are formed. The inner peripheral surface of the first recess 49h is formed in a semicircular shape. The inner peripheral surface of the second concave portion 49i is a half whose diameter is smaller than that of the first concave portion 49h so as to correspond to the outer peripheral surface of the front end portion of the motor 5 (specifically, the cover 5b covering the outer protruding portion of the rotating shaft 5a). It is formed in a circular shape. The front end of the motor 5 is accommodated and supported in the second recess 49i.

  The front suspension cross member 49 configured as described above supports the differential 11 in a state where the lower portion is accommodated in the space 49g and the first recess 49h. Details of this support structure will be described later.

  The differential 11 narrows as it goes to the rear of the vehicle. Two attachment projections 11a (shown only in FIG. 7) are formed on the front surface of the differential 11 so as to protrude forward from the lower edge of the vehicle. Trapezoidal steering gear box support portions 49j and 49k are provided in the vehicle width direction inward portions of the front surfaces of the side portions 49d and 49e as viewed from the side of the vehicle. A steering gear box 55 is attached and fixed to the front surfaces of the steering gear box support portions 49j and 49k by substantially hat-like attachment members 57 and 57 so as to extend in the vehicle width direction.

  Between the steering gear box support portions 49j and 49k, inward in the vehicle width direction, a rectangular differential support portion 49l is installed so as to extend in the vehicle width direction. Insertion holes 49m are formed through the portions of the differential support portion 49l corresponding to the mounting protrusions 11a. The mounting protrusion 11a is inserted and supported in each insertion hole 49m. As a result, the differential 11 is fixedly attached to the differential support portion 49l.

  Mounting portions 11b and 11c (shown only in FIG. 7) are formed on both sides of the rear end portion of the differential 11 in the vehicle width direction so as to protrude outward in the vehicle width direction. The left attachment portion 11b passes through the left attachment portion 11b and the main body portion 49a with a fastening member such as a bolt (not shown; the same applies hereinafter), whereby the first concave portion 49h and the first recess portion on the upper surface of the main body portion 49a. 2 is fastened and fixed in the vicinity of the left side of the vehicle at the boundary of the recess 49i. On the other hand, the right mounting portion 11c penetrates the fastening member to the right mounting portion 11c and the main body portion 49a, so that the boundary portion between the first concave portion 49h and the second concave portion 49i on the upper surface of the main body portion 49a It is fastened and fixed in the vicinity. For these reasons, the differential 11 is fixedly attached to the front suspension cross member 49.

  The differential 11 is supported by the front suspension cross member 49 as described above, and is disposed close to the front of the motor 5 so as to be positioned behind the front ends of the front wheels 7 and 9.

  Further, an extension 59 is integrally provided at the center in the vehicle width direction of the main body 49a so as to extend rearward from the rear edge. The extension 59 is disposed below the floor tunnel 27a, and has a U-shaped motor support 61 in plan view, and a case-shaped battery support formed continuously behind the motor support 61 in the vehicle. Part 63.

  The motor support portion 61 includes left and right side wall portions 61a and 61b extending in the vehicle front-rear direction, and a rear wall portion 61c extending in the vehicle width direction and coupled to the rear end portions of the side wall portions 61a and 61b. . Inner surfaces in the vehicle width direction of the side wall portions 61 a and 61 b are formed in an arc shape so as to correspond to the outer peripheral surface of the motor 5. The rear wall portion 61c becomes narrower as it goes rearward of the vehicle.

  The motor support portion 61 configured as described above is configured such that the motor 5 is mounted on the arcuate portion 61d on the inner side in the vehicle width direction of both side wall portions 61a and 61b, so that the rotation shaft 5a of the motor 5 is front and rear of the vehicle. It is supported in a vertical position facing the direction.

  Attachment portions 5c to 5f (shown only in FIG. 7) are formed on both sides in the vehicle front-rear direction on the outer peripheral surface of the motor 5 so as to protrude outward in the vehicle width direction. The left attachment portions 5c and 5d penetrate the fastening members through the left attachment portions 5c and 5d and the left wall portion 61a of the motor support portion 61, so that the left attachment portions 5c and 5d are provided at both ends in the vehicle front-rear direction on the upper surface of the left wall portion 61a. Each is fastened and fixed. On the other hand, the right attachment portions 5e and 5f pass through the fastening members through the right attachment portions 5e and 5f and the right side wall portion 61b of the motor support portion 61, respectively, so that they are respectively provided at both ends in the vehicle longitudinal direction on the upper surface of the right side wall portion 61b. Fastened and fixed. For these reasons, the motor 5 is attached and fixed to the motor support 61.

  The motor 5 is placed and supported on the motor support 61 as described above, so that the motor 5 is disposed between the wheel shaft FA at the center of the front wheels 7 and 9 and the wheel shaft RA at the center of the rear wheels 65 and 67. ing. Specifically, the motor 5 is mostly located at the rear of the dash panel 17 except for the front end, and the rotating shaft 5a is positioned below the wheel axes FA and RA of the front wheels 7 and 9 and the rear wheels 65 and 67. Thus, it is arranged at the front end in the floor tunnel 27a.

  The battery support 63 is narrower than the motor support 61. The battery support portion 63 includes a rectangular bottom wall portion 63a, a front wall portion 63b that extends upward from a front end edge portion of the bottom wall portion 63a and is integrated with the rear wall portion 61c of the motor support portion 61, and a bottom It has a left wall 63c extending upward from the left edge of the wall 63a and a right wall 63d extending upward from the right edge of the bottom wall 63a. The front wall portion 63b becomes narrower as it goes rearward of the vehicle. A connecting portion 63e is formed at the rear end of each of the side wall portions 63c and 63d so as to protrude rearward from the inner side in the vehicle width direction. An insertion hole 63g is formed through the center of each connecting portion 63e.

  The battery support part 63 configured as described above can support the battery by placing the battery inside thereof (not supported in the figure). The battery is placed and supported on the battery support portion 63 as described above, so that the battery is spaced apart from the rear of the motor 5 in the vehicle.

  As described above, the front suspension cross member 49 and the extension 59 constitute the motor support member 69 that mounts and supports the motor 5 and the differential 11. The motor 5 and the differential 11 are mounted on the front portion of the vehicle 1 as an integrated module by being supported by the motor support member 69 as described above.

  A case-shaped battery support member 71 is provided behind the motor support member 69 in the vehicle. The battery support member 71 is disposed so as to extend in the vehicle width direction below the rear seat 39 arrangement portion of the rear floor panel 27c, and extends upward from the rectangular bottom wall portion 71a and the front edge of the bottom wall portion 71a. A front wall portion 71b extending upward, a rear wall portion 71c extending upward from the rear end edge portion of the bottom wall portion 71a, a left side wall portion 71d extending upward from the left end edge portion of the bottom wall portion 71a, and a bottom wall portion 71a And a right side wall 71e extending upward from the right edge.

  A connecting portion 71f is formed at a portion corresponding to each connecting portion 63e of the motor support member 69 on the front surface of the front wall portion 71b so as to protrude forward of the vehicle. Each connecting portion 71 f overlaps the outer surface in the vehicle width direction of the connecting portion 63 e of the motor support member 69. An insertion hole 71h is formed through the central part of each connection part 71f so as to correspond to the insertion hole 63g of the connection part 63e of the motor support member 69. The front wall portion 71 b is attached and fixed to the rear surface of the No. 3 cross member 45. Thus, the battery support member 71 is attached and fixed to the No. 3 cross member 45.

  The rear wall 71c has a higher height on the upper surface than the front wall 71b. An attachment portion 71j is formed at the left end portion, the vehicle width direction center portion, and the right end portion of the rear surface of the rear wall portion 71c so as to protrude rearward from the upper end edge portion. Each mounting portion 71j is fastened and fixed to the lower surface of the No. 4 cross member 47 by passing through the fastening member through the mounting portion 71j and the No. 4 cross member 47. Accordingly, the battery support member 71 is fixedly attached to the No. 4 cross member 47.

  Each of the side walls 71d and 71e is formed continuously with the front portion 71k having the same height as the front wall portion 71b and the rear of the front portion 71k, and the height of the upper surface is at the rear of the vehicle. It has a rear portion 71l that becomes higher as it goes. The rear end portion of the rear portion 71l has the same height as the rear wall portion 71c.

  Attaching portions 71m are formed on the front portions 71k of the side wall portions 71d and 71e so as to protrude outward in the vehicle width direction from the outer surfaces in the vehicle width direction. Each of the attachment portions 71m includes a rectangular support portion 71n extending outward in the vehicle width direction from the upper edge end portion of the front surface 71k in the vehicle width direction outer surface, and the bottom surface of the support portion 71n and the vehicle width of the front portion 71k. It has three triangular plate-like ribs 71o that are arranged at intervals in the vehicle front-rear direction so as to straddle the direction outward surface. An insertion hole 71p is formed through each end of each support portion 71n in the vehicle longitudinal direction. A mounting member 71q is placed and supported on the upper surface of each support portion 71n. Each mounting member 71q has a bottom wall portion 71r and a peripheral wall portion 71s extending upward from the upper surface of the outer peripheral edge portion of the bottom wall portion 71r in the vehicle width direction outer portion. In the bottom wall portion 71r, through holes 71t are formed through the portions corresponding to the respective through holes 71p of the support portion 71n. Each attachment member 71q is fastened and fixed to the upper surface of the support portion 71n by passing the fastening member through the bottom wall portion 71r and the insertion holes 71t and 71p of the support portion 71n. The left mounting member 71q has a peripheral wall portion 71s fastened or welded to the inclined portion 41a of the left rear side frame 41 by a fastening member. On the other hand, the peripheral wall 71s of the right mounting member 71q is fastened or welded to the inclined part 43a of the right rear side frame 43 by a fastening member. Accordingly, the battery support member 71 is attached and fixed to the rear side frames 41 and 43.

  The battery support member 71 configured as described above supports the battery 3 by placing the battery 3 therein. The battery 3 is placed and supported on the battery support member 71 as described above, so that the battery 3 is spaced from the rear of the motor 5 and mounted on the rear portion of the vehicle 1.

  Further, the motor support member 69 has an extended portion 59 directly coupled to the battery support member 71. Specifically, the motor support member 69 is inserted into the insertion holes 63g and 71h of the connection portions 63e and 71f of the motor support member 69 and the battery support member 71, thereby inserting the battery support member 71 into the battery support member 71. On the other hand, at the rear end portion of the extension portion 59, the pin member 73 extending in the vehicle width direction is connected so as to be swingable in the vertical direction. Thus, the motor support member 69 is attached and supported by the battery support member 71 at the rear end thereof.

  As described above, since the motor support member 69 connected to the battery support member 71 is supported with a long span in the vehicle front-rear direction, deformation due to the driving force applied to the differential 11 and the torque reaction force of the brake can be suppressed. In addition, the transmission accuracy of the driving force can be improved.

  As described above, the motor support member 69 and the battery support member 71 are attached to the vehicle body.

  In addition, a storage case 75 (storage portion) that opens upward is provided at the vehicle longitudinal direction central portion of the front chamber 21 so as to extend in the vehicle width direction. Further, although not shown, the front chamber 21 is provided with an inverter, a charger, and the like.

-Effect-
As described above, according to the present embodiment, since the relatively heavy motor 5 is disposed between the wheel axles FA and RA of the front wheels 7 and 9 and the rear wheels 65 and 67, the yaw moment of inertia can be reduced. Can do.

  Further, since the motor support member 69 is connected to the battery support member 71, the rigidity can be improved and the torque reaction force of the motor 5 can be dispersed.

  Thus, the yaw moment of inertia can be reduced, the rigidity can be improved, and the torque reaction force of the motor 5 can be dispersed.

  In addition, since the motor 5 is disposed in the floor tunnel 27a, the space in the floor tunnel 27a can be used effectively.

  In addition, since the relatively heavy differential is arranged behind the front end of the front wheels 7 and 9 and in front of the motor 5, the yaw moment of inertia can be further reduced.

  Further, since the motor support member 69 supports the differential 11 in addition to the motor 5, the motor 5 and the differential 11 can be stably supported by the motor support member 69.

  The motor support member 69 includes a front suspension cross member 49 that supports the differential 11, and an extension 59 that is provided on the front suspension cross member 49 so as to extend rearward from the rear edge of the vehicle and supports the motor 5. Have. That is, the motor 5 is supported by the front suspension cross member 49 attached to the vehicle body with a long span. Therefore, the motor 5 can be supported by a wide surface, and the torque reaction force of the motor 5 can be further dispersed.

  Further, since the motor 5 is arranged so that a part thereof is located behind the dash panel 17 in the vehicle, a space can be made in the front chamber 21.

  In addition, since the storage case 75 is provided in front of the motor 5 relative to the motor 5, the convenience of the storage portion during rear parking can be improved.

  In particular, in the present embodiment, the storage case 75 can be provided in an empty space in the front chamber 21.

  By the way, since the motor 5 is arranged so that the rotating shaft 5a faces in the vehicle front-rear direction, the rotation direction of the motor 5 is the vehicle width direction (vertical direction), and the torque reaction force of the motor 5 on the motor support member 69. Is transmitted, the motor support member 69 tends to vibrate in the vertical direction.

  Here, according to the present embodiment, since the motor support member 69 is connected to the battery support member 71 so as to be swingable in the vertical direction, the motor support member 69 can be allowed to vibrate in the vertical direction. it can.

  In particular, in the present embodiment, vibration from the front wheels 7 and 9 is transmitted to the motor support member 69 in addition to the torque reaction force of the motor 5, so the motor support member 69 tends to vibrate further in the vertical direction.

  Here, according to the present embodiment, as described above, the motor support member 69 can be allowed to vibrate in the vertical direction.

  Further, since the motor 5 is disposed such that the rotation shaft 5a is positioned below the wheel shafts FA and RA of the front wheels 7 and 9 and the rear wheels 65 and 67, the center of gravity can be lowered.

(Other embodiments)
In the above embodiment, the motor 5 drives the front wheels 7 and 9, but may drive the rear wheels 65 and 678.

  Moreover, in the said embodiment, although the motor 5 is arrange | positioned in the floor tunnel 27a, as long as it arrange | positions between the wheel axles FA and RA of the front wheels 7 and 9 and the rear wheels 65 and 67, it is not limited to this, For example, it may be arranged in the front chamber 21.

  In the above-described embodiment, the motor support member 69 is configured by the front suspension cross member 49 and the extension 59. However, the configuration is not limited to this. For example, the motor support member 69 may be configured by only the front suspension cross member 49 or may be configured by a subframe. You may do it.

  Moreover, in the said embodiment, although the front suspension cross member 49 and the extension part 59 are united, you may connect these with separate volt | bolts etc. as these.

  Moreover, in the said embodiment, although the motor 5 is arrange | positioned close to the vehicle rear of the differential 11, and the rotating shaft 5a of this motor 5 is directly connected with the differential 11, it is not restricted to this, For example, it shows in FIG. Thus, the motor 5 may be spaced apart from the differential 11 at the rear of the vehicle, and the rotating shaft 5a of the motor 5 may be connected to the differential 11 via the speed reducer 77 and the propeller shaft 79 (corresponding to claim 6). . In FIG. 8, the motor support member 69 extends in the vehicle width direction and is provided so as to extend from the center of the cross member 69a in the vehicle width direction to the rear of the vehicle. The extended portion 69b supports the motor 5 and the speed reducer 77. Thus, if the motor 5 is separated from the rear of the differential 11 and the rotation shaft 5a is connected to the differential 11 via the propeller shaft 79, the motor 5 is arranged at an arbitrary position in the floor tunnel 27a. be able to.

  Moreover, in the said embodiment, although the motor 5 is arrange | positioned so that one part may be located in the vehicle back of the dash panel 17, even if it arrange | positions so that all may be located in the vehicle back of the dash panel 17, Good.

  In the above embodiment, the motor support member 69 is connected to the battery support member 71 so as to be swingable in the vertical direction around the pin member 73 extending in the vehicle width direction at the rear end of the motor support member 69. However, the connection structure of the motor support member 69 and the battery support member 71 is not limited to this. For example, the connection structure may be as follows. That is, as shown in FIG. 9, a rear wall 63i extending upward from the rear edge is formed on the bottom wall 63a of the battery support 63 of the motor support member 69, and the rear wall 63i is formed on the rear surface of the rear wall 63i. The connecting portion 63j is formed so as to protrude rearward from the upper edge of the vehicle. An insertion hole 63k is formed through the central portion of the connecting portion 63j. A portion corresponding to the connecting portion 63j of the motor supporting member 69 on the front surface of the front wall portion 71b of the battery supporting member 71 protrudes forward from the lower edge of the vehicle and faces the lower portion of the connecting portion 63j of the motor supporting member 69. Thus, the connecting portion 71u is formed. An insertion hole 71v is formed through the central portion of the connection portion 71u so as to correspond to the insertion hole 63k of the connection portion 63j of the motor support member 69. Then, with the rubber bush 81 sandwiched between the connecting portions 63j and 71u of the motor support member 69 and the battery support member 71, fastening members are inserted into the insertion holes 63k and 71v and the rubber bush 81 of the connecting portions 63j and 71u. The motor support member 69 is connected to the battery support member 71 so as to be swingable in the vertical direction around the rubber bush 81 by passing through and fastening and fixing the rubber bush 81 between the connecting portions 63j and 71u. ing. According to this connection structure, the motor support member 69 can be allowed to vibrate in the vertical direction.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the battery and motor mounting structure of the electric vehicle according to the present invention can be applied to applications and the like that need to reduce the yaw moment of inertia and distribute the torque reaction force of the motor.

DESCRIPTION OF SYMBOLS 1 Electric vehicle 3 Battery 5 Motor 5a Rotating shaft 7, 9 Front wheel (drive wheel)
11 differential 17 dash panel 27 floor panel 27a floor tunnel 49 front suspension cross member 59 extension parts 65, 67 rear wheel 69 motor support member 71 battery support member 75 storage case (storage part)
79 Propeller shaft FA Front wheel axle RA Rear wheel axle

Claims (10)

A battery and a motor mounting structure of an electric vehicle including a battery and a motor that is supplied with electric power from the battery and drives a driving wheel,
A motor support member that is disposed between the wheel shafts of the front wheels and the rear wheels and supports the motor in a state in which the rotation shaft faces the vehicle longitudinal direction;
A battery and motor mounting structure for an electric vehicle, comprising: a battery support member disposed behind the motor support member and connected to the motor support member to support the battery. In the electric vehicle battery and motor mounting structure according to claim 1,
A floor tunnel is formed in the vehicle width direction center portion of the floor panel so as to extend in the vehicle longitudinal direction and bulge upward.
The electric motor battery and motor mounting structure, wherein the motor is disposed in the floor tunnel. In the electric vehicle battery and motor mounting structure according to claim 2,
The rotation shaft of the motor is connected to the front wheel as the driving wheel via a differential, and the differential is disposed behind the front end of the front wheel and in front of the motor. An electric vehicle battery and motor mounting structure. In the electric vehicle battery and motor mounting structure according to claim 3,
In addition to the motor, the motor support member supports the differential and a battery and motor mounting structure of an electric vehicle. In the electric vehicle battery and motor mounting structure according to claim 4,
The motor support member includes a front suspension cross member that supports the differential, and an extension portion that is provided on the front suspension cross member so as to extend rearward from a rear edge portion of the front suspension cross member and supports the motor. A battery and motor mounting structure for an electric vehicle, wherein the extension is connected to the battery support member. In the electric vehicle battery and motor mounting structure according to claim 3,
A structure for mounting a battery and a motor of an electric vehicle, wherein the motor is spaced apart from the differential behind the vehicle, and a rotation shaft is connected to the differential via a propeller shaft. In the electric vehicle battery and motor mounting structure according to any one of claims 1 to 6,
An electric vehicle battery and motor mounting structure, wherein the motor is disposed so that at least a part thereof is positioned behind the dash panel in the vehicle. In the electric vehicle battery and motor mounting structure according to any one of claims 1 to 7,
A battery and motor mounting structure for an electric vehicle, wherein a storage portion is provided in front of the motor. In the electric vehicle battery and motor mounting structure according to any one of claims 1 to 8,
A structure for mounting a battery and a motor of an electric vehicle, wherein the motor support member is connected to the battery support member so as to be swingable in a vertical direction. In the electric vehicle battery and motor mounting structure according to any one of claims 1 to 9,
An electric vehicle battery and motor mounting structure, wherein the motor is disposed such that a rotating shaft thereof is positioned below the wheel shaft.

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