JP2010155570A - Drive system for electric vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase a cruising distance and suppress an increase of reinforcement against a head-on collision of a vehicle body. <P>SOLUTION: In a drive system 10, a rotor 36 of a generator 22 is fixed on a propeller shaft 16 which is always rotated during running to be integrally rotatable. Accordingly, during running of an electric vehicle, the generator 22 generates electric power and a battery unit 24 is charged, so that a cruising distance can be increased. A propeller shaft 16 penetrates through a battery unit 24. Accordingly, when a head-on collision generates at the electric vehicle and the propeller shaft 16 is broken downward in the vertical direction of the vehicle, the propeller shaft 16 interferes with the battery unit 24, thus dropping the battery unit 24 from the vehicle body. This can separate the battery unit 24 serving as an inertia mass working on a cabin from the vehicle body, thus suppressing an increase of reinforcement against a head-on collision of the vehicle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drive system for an electric vehicle.

Patent Document 1 discloses a power generation method for an electric vehicle. In this electric vehicle power generation method, in an electric vehicle, when an accelerator is released or a brake is stepped on, a generator is connected to a propeller shaft to generate power using repulsive force, and a battery is generated by the obtained electric power. It is charged and used for running.
JP-A-11-55808 JP-A-4-27624 JP-A-6-169505 Special table 2001-519139 gazette Japanese Patent Laid-Open No. 5-280527

  However, since the method described in Patent Document 1 generates power only during braking, there is room for improvement in order to increase the power generation amount and extend the cruising range.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a drive system for an electric vehicle that can increase a power generation amount and extend a cruising range.

  In order to solve the above-mentioned problems, a drive system for an electric vehicle according to claim 1 is disposed at a front portion of a vehicle body and connected to a front wheel so as to be able to transmit a driving force, and extended in the vehicle front-rear direction. A propeller shaft whose front side in the vehicle front-rear direction is connected to the drive motor via a transfer so that the driving force can be transmitted; and a rear side of the propeller shaft arranged in the rear of the vehicle body so that the driving force can be transmitted to the rear side in the vehicle front-rear direction A differential mechanism that is connected and transmits a driving force transmitted from the propeller shaft to a rear wheel, a rotor that is fixed to the propeller shaft so as to be integrally rotatable, and a fixed that is disposed to face the rotor And a generator that generates electric power as the rotor rotates, and is fixed to the vehicle body and is below the propeller shaft in the vehicle vertical direction. Provided as with the modification interferes with the propeller shaft, and a, a battery unit for supplying the drive motor of electric power charged while being charged by power generated by the generator.

  In the electric vehicle drive system according to the first aspect, when the drive motor is driven, the drive force is transmitted from the drive motor to the front wheels, thereby causing the electric vehicle to travel. Further, a propeller shaft is connected to the drive motor via a transfer so as to be able to transmit a drive force, and the propeller shaft is always rotated while the electric vehicle is running.

  Furthermore, the rotor of the generator is fixed to the propeller shaft so as to be integrally rotatable, and this generator generates electric power when the propeller shaft is rotated, that is, when the electric vehicle is running. appear. The battery unit is charged with the electric power generated by the generator, and the electric power charged in the battery unit is supplied to the drive motor.

  Thus, according to the electric vehicle drive system of the first aspect, not only during braking but also when the electric vehicle is running, electric power is generated by the generator and the battery unit is charged. By increasing the power generation, the cruising range can be extended.

  According to the electric vehicle drive system of the first aspect, the rotor of the generator is integrally provided on the propeller shaft, and the generator and the propeller shaft are integrated. Therefore, for example, as compared with a structure in which the propeller shaft and the generator are configured separately and the driving force of the propeller shaft is transmitted to the generator via a belt mechanism or the like, the propeller is driven from the generator while the electric vehicle is running. The resistance force acting on the shaft can be reduced. Thereby, since the power consumption in a drive motor can be suppressed, the cruising range can be further extended.

  Further, according to the electric vehicle drive system of the first aspect, the battery unit is fixed to the vehicle body and provided to interfere with the propeller shaft as the propeller shaft is deformed downward in the vehicle vertical direction. Yes. Therefore, when a frontal collision occurs in the electric vehicle and the propeller shaft is deformed downward in the vehicle vertical direction, the battery unit can be dropped from the vehicle body by the interference of the propeller shaft with the battery unit.

  Thereby, since the battery unit as an inertial mass acting on the passenger compartment can be separated from the vehicle body, an increase in reinforcement for a frontal collision in the vehicle body can be suppressed, and the vehicle body can be reduced in weight and cost. .

  The electric vehicle drive system according to claim 2 is the electric vehicle drive system according to claim 1, wherein the propeller shaft has a fragile portion between the transfer and the differential mechanism in the vehicle front-rear direction. Has been.

  According to the electric vehicle drive system of the second aspect, the propeller shaft has the weakened portion at the middle portion in the vehicle longitudinal direction. Therefore, when a frontal collision occurs in the electric vehicle, the propeller shaft can be deformed (folded) downward in the vertical direction of the vehicle using this weak portion as a trigger.

  An electric vehicle drive system according to a third aspect is the electric vehicle drive system according to the second aspect, wherein the fragile portion is positioned on the front side in the vehicle front-rear direction with respect to the center of gravity of the vehicle body.

  According to the electric vehicle drive system of the third aspect, the fragile portion is located on the front side in the vehicle front-rear direction with respect to the center of gravity of the vehicle body. Therefore, it is possible to create a mode in which the propeller shaft is folded downward with the weak part as a trigger by utilizing the moment acting around the center of gravity in the event of a frontal collision of the electric vehicle.

  The drive system for an electric vehicle according to claim 4 is the drive system for an electric vehicle according to any one of claims 1 to 3, wherein the propeller shaft penetrates the battery unit. .

  According to the electric vehicle drive system of the fourth aspect, the propeller shaft passes through the battery unit. Therefore, when a frontal collision occurs in the electric vehicle and the propeller shaft is deformed downward in the vehicle vertical direction, the propeller shaft can be made to interfere with the battery unit.

  Further, as described above, when the propeller shaft passes through the battery unit, for example, the propeller shaft and the battery unit are downsized in the vehicle height direction as compared with the configuration in which the propeller shaft and the battery unit are arranged in the vehicle height direction. can do.

  The drive system for an electric vehicle according to claim 5 is the drive system for an electric vehicle according to any one of claims 1 to 4, wherein the stator is supported by the battery unit. Yes.

  According to the electric vehicle drive system of the fifth aspect, the stator of the generator integrated with the propeller shaft is supported by the battery unit. Therefore, when a frontal collision occurs in the electric vehicle and the propeller shaft is deformed downward in the vehicle vertical direction, the propeller shaft can be made to interfere with the battery unit (that is, the propeller shaft can be directly interfered with the battery unit, Alternatively, the deformation force of the propeller shaft can be transmitted to the battery unit via the generator).

  Moreover, according to the electric vehicle drive system of the fifth aspect, the generator and the battery unit are integrated by the stator being supported by the battery unit. Accordingly, the wire harness connecting the generator and the battery unit can be shortened, and charging loss when the battery unit is charged by the electric power generated by the generator can be suppressed.

  Further, by integrating the generator and the battery unit, the propeller shaft and the battery unit integrated with the generator are also integrated. Accordingly, since the entire drive system including the propeller shaft and the battery unit is an integral unit, for example, the drive system can be mounted on the vehicle body integrally with the chassis component.

  The electric vehicle drive system according to claim 6 is the electric vehicle drive system according to any one of claims 1 to 5, wherein the connection between the propeller shaft and the differential mechanism is cut off. A clutch and a control unit for controlling the operation of the clutch according to the running state of the electric vehicle are further provided.

  According to the electric vehicle drive system of the sixth aspect, the operation of the clutch mechanism is interrupted according to the traveling state of the electric vehicle. Thereby, according to the traveling state of the electric vehicle, the state is switched between a state where only the front wheels are driven by the drive motor and a state where the driving force of the drive motor is transmitted to the front wheels and the rear wheels and the front wheels and the rear wheels are driven. be able to.

  In order to solve the above problems, an electric vehicle drive system according to a seventh aspect of the present invention includes a drive motor disposed at the front of the vehicle body and connected to the front wheels so as to be able to transmit drive force, and extending in the vehicle longitudinal direction. A propeller shaft that is connected to the front side of the vehicle in the front-rear direction of the vehicle so as to be able to transmit a driving force via the transfer, and a rear side of the propeller shaft that transmits the driving force. And a differential mechanism that transmits the driving force transmitted from the propeller shaft to the rear wheel, a rotor that is fixed to the propeller shaft so as to be integrally rotatable, and the rotor. A generator that generates electric power as the rotor rotates, and is fixed to a vehicle body and supported by the stator. The electric power charged with is charged by the generated power and a, a battery unit for supplying to said drive motor.

  In the electric vehicle drive system according to the seventh aspect, when the drive motor is driven, the drive force is transmitted from the drive motor to the front wheels, thereby causing the electric vehicle to travel. Further, a propeller shaft is connected to the drive motor via a transfer so as to be able to transmit a drive force, and the propeller shaft is always rotated while the electric vehicle is running.

  Furthermore, the rotor of the generator is fixed to the propeller shaft so as to be integrally rotatable, and this generator generates electric power when the propeller shaft is rotated, that is, when the electric vehicle is running. appear. The battery unit is charged with the electric power generated by the generator, and the electric power charged in the battery unit is supplied to the drive motor.

  As described above, according to the electric vehicle drive system of the seventh aspect, not only during braking but also when the electric vehicle is running, electric power is generated by the generator and the battery unit is charged. By increasing the power generation, the cruising range can be extended.

  According to the electric vehicle drive system of the seventh aspect, the rotor of the generator is provided integrally with the propeller shaft, and the generator and the propeller shaft are integrated. Therefore, for example, as compared with a structure in which the propeller shaft and the generator are configured separately and the driving force of the propeller shaft is transmitted to the generator via a belt mechanism or the like, the propeller is driven from the generator while the electric vehicle is running. The resistance force acting on the shaft can be reduced. Thereby, since the power consumption in a drive motor can be suppressed, the cruising range can be further extended.

  Further, according to the electric vehicle drive system of the seventh aspect, the generator stator integrated with the propeller shaft is supported by the battery unit. Accordingly, when a frontal collision occurs in the electric vehicle and the propeller shaft is deformed downward in the vehicle vertical direction, the propeller shaft interferes with the battery unit (that is, the propeller shaft directly interferes with the battery unit, or Then, the deformation force of the propeller shaft is transmitted to the battery unit via the generator), whereby the battery unit can be dropped from the vehicle body.

  Thereby, since the battery unit as an inertial mass acting on the passenger compartment can be separated from the vehicle body, an increase in reinforcement for a frontal collision in the vehicle body can be suppressed, and the vehicle body can be reduced in weight and cost. .

  And according to the drive system of the electric vehicle of Claim 7, a generator and a battery unit are integrated by the stator being supported by the battery unit. Accordingly, the wire harness connecting the generator and the battery unit can be shortened, and charging loss when the battery unit is charged by the electric power generated by the generator can be suppressed.

  Further, by integrating the generator and the battery unit, the propeller shaft and the battery unit integrated with the generator are also integrated. Accordingly, since the entire drive system including the propeller shaft and the battery unit is an integral unit, for example, the drive system can be mounted on the vehicle body integrally with the chassis component.

  As described above in detail, according to the present invention, not only during braking but also when an electric vehicle is running, electric power is generated by the generator and the battery unit is charged. Can extend the cruising range.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  Note that an arrow UP, an arrow FR, and an arrow OUT shown in the drawings respectively indicate the vehicle vertical direction upper side, the vehicle front-rear direction front side, and the vehicle width direction outer side of the electric vehicle EV according to the embodiment of the present invention.

  The electric vehicle EV shown in FIG. 1 includes a drive system 10. The drive system 10 includes a drive motor 12, a transfer 14, a propeller shaft 16, a clutch 18, a differential mechanism 20, a generator 22, a battery unit 24, and a control unit 26.

  The drive motor 12 is disposed in the front part of the vehicle body, and is connected to the front wheels 28 through the axle or the like so as to be able to transmit drive force.

  The propeller shaft 16 extends in the vehicle front-rear direction, and the front side in the vehicle front-rear direction is connected to the drive motor 12 via the transfer 14 so as to be able to transmit a driving force.

  As shown in FIGS. 1 and 4, the propeller shaft 16 is provided between the transfer 14 and the differential mechanism 20 in the longitudinal direction of the vehicle (more specifically, between the transfer 14 and the battery unit 24 in the longitudinal direction of the vehicle). A constricted fragile portion 30 is formed in the middle. The fragile portion 30 is positioned on the front side in the vehicle front-rear direction with respect to the center of gravity 32 of the vehicle body.

  The clutch 18 is configured by an electromagnetic clutch or the like that can be switched between a disconnected state in which the connection between the propeller shaft 16 and the differential mechanism 20 is disconnected and a connected state in which the propeller shaft 16 and the differential mechanism 20 are connected.

  The differential mechanism 20 is disposed at the rear of the vehicle body. The differential mechanism 20 is connected to the rear side in the vehicle longitudinal direction of the propeller shaft 16 and the clutch 18 so as to be able to transmit the driving force, and transmits the driving force transmitted from the propeller shaft 16 to the rear wheel 34. Has been.

  For example, as shown in FIGS. 2 and 3, the generator 22 is configured by a brushed motor having a rotor 36, a stator 38, and a rectifier 40.

  The rotor 36 includes a core and a coil, and is fixed to the propeller shaft 16 so as to be integrally rotatable. The stator 38 is composed of a motor housing 42 and a magnet 43 fixed to the inner peripheral surface of the motor housing 42, and is arranged on the radially outer side of the rotor 36 so as to face the rotor 36 in the radial direction. Has been. The rectifier 40 includes a commutator 44, a brush 46, a brush holder 48, and the like. The generator 22 is configured to generate electric power as the rotor 36 rotates.

  The generator 22 is housed in a battery case 54 to be described later, and is supported by the battery case 54 via a bracket 50.

  The battery unit 24 includes a battery 52 and a battery case 54. The battery 52 is housed inside the battery case 54 and is configured to be charged with power generated by the generator 22 and to supply the charged power to the drive motor 12. The battery 52 is also charged with electric power generated by the drive motor 12 during braking.

  The battery case 54 is fixed to a vehicle body (for example, a floor panel, a cross member, etc.) by a fixture, welding or the like (not shown). Further, the propeller shaft 16 passes through the battery case 54.

  In the drive system 10, when a frontal collision occurs in the electric vehicle EV and the propeller shaft 16 is deformed downward in the vehicle vertical direction as will be described later, the propeller shaft 16 and the battery case 54 interfere with each other. (That is, the propeller shaft 16 is directly interfered with the battery case 54 or the deformation force of the propeller shaft 16 is transmitted to the battery case 54 via the generator 22). Relative position and gap are set.

  The control unit 26 controls the operation of the drive motor 12 based on an accelerator signal or the like output according to the accelerator operation by the driver, or controls the operation of the clutch 18 according to the traveling state of the electric vehicle EV. It is configured.

  The control unit 26 keeps the clutch 18 in the disconnected state during normal running so that the driving force of the drive motor 12 is not transmitted to the rear wheel 34, and keeps the clutch 18 connected when running on an uphill road or running on a low friction road. 12 driving forces are transmitted to the rear wheel 34.

  Next, the operation and effect of one embodiment of the present invention will be described.

  In the drive system 10 according to the embodiment of the present invention, when the drive motor 12 is driven, a drive force is transmitted from the drive motor 12 to the front wheels 28, thereby causing the electric vehicle EV to travel. Further, a propeller shaft 16 is connected to the drive motor 12 via a transfer 14 so as to be able to transmit a driving force, and the propeller shaft 16 is always rotated while the electric vehicle EV is traveling.

  Further, the rotor 36 of the generator 22 is fixed to the propeller shaft 16 so as to be integrally rotatable. The generator 22 is driven when the propeller shaft 16 is rotated, that is, the electric vehicle EV is running. When you are generating power. The battery unit 24 is charged by the electric power generated by the generator 22, and the electric power charged in the battery unit 24 is supplied to the drive motor 12.

  Thus, according to the drive system 10 according to the embodiment of the present invention, not only during braking but also when the electric vehicle EV is running, electric power is generated by the generator 22 and the battery unit 24 is charged. Therefore, it is possible to increase the power generation amount and extend the cruising range.

  Moreover, according to the drive system 10 which concerns on one Embodiment of this invention, the rotor 36 of the generator 22 is integrally provided in the propeller shaft 16, and the generator 22 and the propeller shaft 16 are integrated. Therefore, for example, compared to a structure in which the propeller shaft 16 and the generator 22 are configured separately and the driving force of the propeller shaft 16 is transmitted to the generator 22 via a belt mechanism or the like, the electric vehicle EV is traveling. Further, the resistance force acting on the propeller shaft 16 from the generator 22 can be reduced. Thereby, since the power consumption in the drive motor 12 can be suppressed, the cruising range can be further extended.

  Moreover, according to the drive system 10 according to an embodiment of the present invention, the drive motor 12 is disposed at the front of the vehicle body where a load is applied during braking. For this reason, more regenerative energy can be recovered by the drive motor 12 during braking.

  Further, in the drive system 10 according to the embodiment of the present invention, as shown in the upper diagram of FIG. 5, when a frontal collision occurs in the electric vehicle EV, the drive motor 12 that is a heavy object disposed in the front part of the vehicle body. Movement in the vehicle front-rear direction is restricted. As with the drive motor 12, the heavy battery unit 24 becomes an inertial mass and continues to move to the front side of the vehicle. However, as shown in the middle diagram of FIG. The propeller shaft 16 is stretched.

  However, the propeller shaft 16 has a fragile portion 30 between the transfer 14 and the battery unit 24 in the vehicle front-rear direction. Moreover, the fragile portion 30 is located on the front side in the vehicle front-rear direction with respect to the center of gravity 32 of the vehicle body. Therefore, at the time of a frontal collision of the electric vehicle EV, a mode in which the propeller shaft 16 is folded downward with the fragile portion 30 as a trigger, as shown in the lower diagram of FIG. Can be produced.

  Moreover, the propeller shaft 16 passes through the battery unit 24, and the stator 38 of the generator 22 integrated with the propeller shaft 16 is supported by the battery case 54. For this reason, when a frontal collision occurs in the electric vehicle EV and the propeller shaft 16 is bent downward in the vehicle vertical direction, the propeller shaft 16 interferes with the battery case 54 (that is, the propeller shaft 16 directly contacts the battery case 54). The battery unit 24 is dropped from the vehicle body as shown in the lower diagram of FIG. 5 due to interference or the deformation force of the propeller shaft 16 is transmitted to the battery case 54 via the generator 22). Can do.

  Thereby, since the battery unit 24 as an inertial mass acting on the passenger compartment can be separated from the vehicle body, an increase in reinforcement for a frontal collision in the vehicle body can be suppressed, and the vehicle body can be reduced in weight and cost. it can.

  Further, if the drive motor 12 is disposed at the rear part of the vehicle body, the inertia mass increases at the rear part of the vehicle body. For this reason, in order to absorb energy at the time of a frontal collision of the electric vehicle EV, it is necessary to reinforce the front portion of the vehicle body. However, according to the drive system 10 according to the embodiment of the present invention, since the drive motor 12 is disposed in the front portion of the vehicle body, the reinforcement of the front portion of the vehicle body can be reduced.

  Further, as described above, when the propeller shaft 16 penetrates the battery unit 24, for example, the vehicle height is higher than the configuration in which the propeller shaft 16 and the battery unit 24 are arranged side by side in the vehicle height direction. It can be downsized in the direction.

  Moreover, according to the drive system 10 which concerns on one Embodiment of this invention, the generator 22 is provided in the battery unit 24 integrally. Therefore, the wire harness connecting the generator 22 and the battery unit 24 can be shortened, and charging loss when the battery unit 24 is charged by the electric power generated by the generator 22 can be suppressed.

  Further, by integrating the generator 22 and the battery unit 24, the propeller shaft 16 and the battery unit 24 integrated with the generator 22 are also integrated. Accordingly, since the entire drive system 10 including the propeller shaft 16 and the battery unit 24 is an integral unit, for example, the drive system 10 can be mounted on the vehicle body integrally with the chassis component.

  Moreover, according to the drive system 10 which concerns on one Embodiment of this invention, operation | movement of the clutch 18 mechanism is interrupted | blocked according to the driving | running | working state of the electric vehicle EV. Thus, only the front wheels 28 are driven by the drive motor 12 in accordance with the traveling state of the electric vehicle EV, and the driving force of the drive motor 12 is transmitted to the front wheels 28 and the rear wheels 34 so that the front wheels 28 and the rear wheels 34 are driven. Can be switched to a driven state.

  That is, the load acting on the drive motor 12 can be reduced by keeping the clutch 18 in the disconnected state during normal travel so that the driving force of the drive motor 12 is not transmitted to the rear wheels 34. On the other hand, when traveling on an uphill road or traveling on a low friction road, the clutch 18 can be connected to transmit the driving force of the drive motor 12 to the rear wheel 34. As a result, a higher driving force can be obtained while the electric vehicle EV is driven by the front wheels 28 that can recover a large amount of regenerative energy.

  Next, a modification of one embodiment of the present invention will be described.

  In the above-described embodiment, the generator 22 is configured by a motor with a brush. However, as illustrated in FIG. 6, the generator 22 may be configured by a brushless motor having a rotor 36 and a stator 38. In this case, the rotor 36 is composed of a magnet, and the stator 38 is composed of a core and a coil.

  In the above embodiment, the generator 22 is housed in the battery case 54 and supported by the battery case 54 via the bracket 50. However, the generator 22 may be configured as follows.

  That is, as shown in FIGS. 7 and 8, the generator 22 may be arranged outside the battery case 54 and supported by the battery case 54 via the bracket 50.

  Moreover, in the said embodiment, the propeller shaft 16 may be rotatably supported by the battery case 54 by the bearing 56 grade | etc., As FIG. 9 shows. Even if configured in this way, the battery unit 24 can be dropped from the vehicle body when the propeller shaft 16 is bent downward in the vehicle vertical direction with the fragile portion 30 as a trigger.

  Moreover, in the said embodiment, although the weak part 30 was formed in the shape of a constriction, as FIG. 10 shows, you may be comprised by the taper part 58 and the small diameter part 60. As shown in FIG. In this case, the propeller shaft 16 is bent downward in the vehicle vertical direction at the boundary between the tapered portion 58 and the small diameter portion 60.

  As mentioned above, although one Embodiment of this invention and its modification were demonstrated, this invention is not limited above, In the range which does not deviate from the main point, it carries out various deformation | transformation in addition to the above. Of course, it is possible.

1 is a side view of an electric vehicle according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is a side view of the propeller shaft shown by FIG. It is a figure explaining the operation | movement at the time of the front collision of the drive system shown by FIG. It is a figure which shows the modification of the drive system which concerns on one Embodiment of this invention. It is a figure which shows the modification of the drive system which concerns on one Embodiment of this invention. It is a figure which shows the modification of the drive system which concerns on one Embodiment of this invention. It is a figure which shows the modification of the drive system which concerns on one Embodiment of this invention. It is a figure which shows the modification of the propeller shaft which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Drive system 12 Drive motor 14 Transfer 16 Propeller shaft 18 Clutch 20 Differential mechanism 22 Generator 24 Battery unit 26 Control unit 30 Weak part 32 Center of gravity EV Electric vehicle

Claims (7)

A drive motor disposed at the front of the vehicle body and connected to the front wheels to transmit driving force;
A propeller shaft extending in the vehicle front-rear direction and connected to the front side of the vehicle front-rear direction so as to be able to transmit a driving force via the drive motor and a transfer;
A differential mechanism disposed at the rear of the vehicle body and connected to the rear side of the propeller shaft in the vehicle front-rear direction so as to be able to transmit a driving force, and to transmit the driving force transmitted from the propeller shaft to a rear wheel;
A generator configured to have a rotor fixed to the propeller shaft so as to be integrally rotatable, and a stator disposed to face the rotor, and generates electric power as the rotor rotates,
Fixed to the vehicle body and provided to interfere with the propeller shaft as the propeller shaft is deformed downward in the vehicle vertical direction, and is charged by the power generated by the generator and the charged power is driven. A battery unit to be supplied to the motor;
Electric vehicle drive system equipped with. The propeller shaft has a fragile portion between the transfer and the differential mechanism in the vehicle longitudinal direction.
The drive system for an electric vehicle according to claim 1. The fragile portion is positioned on the front side in the vehicle front-rear direction with respect to the center of gravity of the vehicle body,
The drive system for an electric vehicle according to claim 2. The propeller shaft passes through the battery unit;
The drive system of the electric vehicle as described in any one of Claims 1-3. The stator is supported by the battery unit;
The drive system of the electric vehicle as described in any one of Claims 1-4. A clutch for disconnecting the connection between the propeller shaft and the differential mechanism;
A control unit for controlling the operation of the clutch according to the running state of the electric vehicle;
The drive system of the electric vehicle as described in any one of Claims 1-5 provided with these. A drive motor disposed at the front of the vehicle body and connected to the front wheels to transmit driving force;
A propeller shaft extending in the vehicle front-rear direction and connected to the front side of the vehicle front-rear direction so as to be able to transmit a driving force via the drive motor and a transfer;
A differential mechanism disposed at the rear of the vehicle body and connected to the rear side of the propeller shaft in the vehicle front-rear direction so as to be able to transmit a driving force, and to transmit the driving force transmitted from the propeller shaft to a rear wheel;
A generator configured to have a rotor fixed to the propeller shaft so as to be integrally rotatable, and a stator disposed to face the rotor, and generates electric power as the rotor rotates,
A battery unit that is fixed to a vehicle body and that supports the stator, is charged by power generated by the generator, and supplies the charged power to the drive motor;
Electric vehicle drive system equipped with.

Images