WO2017030234A1

WO2017030234A1 - Driving apparatus for electric vehicle

Info

Publication number: WO2017030234A1
Application number: PCT/KR2015/010357
Authority: WO
Inventors: 박병균; 구진회
Original assignee: 주식회사 디아이씨
Priority date: 2015-08-17
Filing date: 2015-10-01
Publication date: 2017-02-23
Also published as: KR101667974B1

Abstract

The present invention provides a driving apparatus for an electric vehicle, the driving apparatus comprising: a driving case having a driving shaft installed therein to rotate on its axis; a first rotor rotatably connected to the inside of the driving case while being mounted on one end of the driving shaft; a second rotor rotatably connected to the inside of the driving case while being mounted on an opposite end of the driving shaft; a first stator fixedly coupled to the driving case so as to be disposed outside the first rotor; a second stator fixedly coupled to the driving case so as to be disposed outside the second rotor; a first power transmitting part installed inside the driving case to transmit power of the first rotor to the driving shaft or to stop the transmission of power to the driving shaft; and a second power transmitting part installed inside the driving case to transmit power of the second rotor to the driving shaft or to stop the transmission of power to the driving shaft. As described above, the first rotor and stator and the second rotor and stator are installed inside the driving case to generate separate rotational forces, and the first and second power transmitting parts selectively transmit the respective rotational forces to the driving shaft so that the driving apparatus for an electric vehicle can implement optimal driving performance according to driving conditions of the electric vehicle. In addition, the driving apparatus occupies a small mounting space when being mounted in an electric vehicle thanks to the simple structure thereof, thereby facilitating the installation operation.

Description

Drive for electric vehicle

The present invention relates to a driving apparatus for an electric vehicle that has a plurality of power characteristics to implement the optimum power according to the driving situation of the vehicle, and enables efficient driving according to the driving conditions of the vehicle.

Recently, with the depletion of fossil fuels, interest in small electric vehicles is increasing as a short-range transportation means to replace cars using internal combustion engines.

In general, the driving source of the electric vehicle, unlike the internal combustion engine, the highest torque at low speed and the highest torque is lowered toward the high speed, so that a gearbox having an electric motor and a constant reduction ratio is used.

Such an electric vehicle secures driving performance by implementing all power with one electric motor. Therefore, the electric motor of the electric vehicle has to be large enough to drive the vehicle and to use the multi-speed transmission to implement the acceleration performance and the climbing capability.

However, when one electric motor is used, a large-capacity motor is used to satisfy all driving patterns according to driving conditions. In general driving situations, only a part of the motor performance is used, thereby reducing energy efficiency and consuming unnecessary power. . As such, there is a problem in that control of speed and torque is not easy and power loss is high depending on the driving situation.

In order to solve this problem, the parallel method of installing two motors in parallel is used, but the parallel method occupies a large amount of mounting space by connecting two motors in a separate structure and decreases efficiency due to weight increase and manufacturing cost. This is a problem that takes a lot.

In addition, when two motors are installed in parallel, a structure in which two motors are connected to one gearbox, respectively, and when two motors are synchronized at the same rotational speed, an impact of driving force occurs. There is a problem that noise occurs.

Such a driving apparatus for an electric vehicle having a conventional parallel structure is presented in Korean Patent Publication No. 10-1454870 (2014.10.20).

An object of the present invention is to provide a driving device for an electric vehicle that occupies a small mounting space and is easy to install in a vehicle, and thus, to realize an optimum driving performance according to a driving condition of the vehicle.

The present invention, the drive case is installed on the inside of the drive shaft rotatably axially rotatable, the first rotor is installed rotatably connected to the inside of the drive case in a state arranged to be inserted into the outer side of the drive shaft, the other end of the drive shaft is inserted A second rotor rotatably connected to the inside of the drive case in an arranged state; a first stator fixedly coupled to the drive case so as to be disposed outside the first rotor; and to be disposed outside the second rotor. A second stator fixedly coupled to a drive case, installed inside the drive case, a first power transmission unit for transmitting or disconnecting power of the first rotor to the drive shaft, and installed inside the drive case; It provides a drive device for an electric vehicle including a second power transmission for transmitting or disconnecting the power of the rotor to the drive shaft.

The driving apparatus for an electric vehicle according to the present invention includes a first power transmission unit in a state in which a first rotor and a first stator and a second rotor and a second stator are installed to generate a separate rotation force inside the driving case. The second power transmission unit selectively transmits each rotational force to the driving shaft, and can realize the optimum driving performance according to the driving conditions of the electric vehicle, and the structure is simple and occupies a small space for mounting in the electric vehicle. This facilitates the installation work.

1 is a cross-sectional view of a driving device for an electric vehicle according to an embodiment of the present invention.

2 is an installation state diagram of FIG. 1.

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

1 is a cross-sectional view showing the configuration of a driving apparatus for an electric vehicle according to an embodiment of the present invention, and FIG. 2 is an installation state diagram of FIG. 1 and 2, the driving apparatus for an electric vehicle according to an embodiment includes a driving case 100, a first rotor 200, a second rotor 300, a first stator 400, and a first A second stator 500, a first power transmission unit 600, and a second power transmission unit 700 are provided.

The drive case 100 is a first rotor 200, a second rotor 300, a first stator 400, a second stator 500, a first power transmission unit 600, the following will be described later It is a cylindrical member which has the space part 100a inside so that the 2 power transmission part 700 may be installed. Here, the space part 100a of the driving case 100 may include a first installation part 101 for installing the first rotor 200, the first stator 400, and the first power transmission part 600; The second rotor 300, the second stator 500, and the second power transmission unit 700 may be configured to install the second installation unit 102.

In addition, a driving force generated through the first rotor 200, the first stator 400, and the first power transmission unit 600 to be described later, and the second rotor 300 inside the driving case 100. And the second stator 500 and the drive shaft 110 is rotated by receiving the driving force generated through the second power transmission unit 700 is installed rotatably connected. At this time, one end of the drive shaft 110 is located in the first installation portion 101 of the drive case 100, the other end of the drive shaft 110 is located in the second installation portion (102). Here, the inner surface of the drive case 100, more specifically, the inner surface where the first mounting portion 101 is located and the inner surface where the second mounting portion 101 is located of the drive shaft 110 A plurality of bearing members 120 are coupled to each other so as to support each end in an axially rotatable state. In addition, the inner surface of the drive case 100, more specifically, the inner surface on which the first mounting portion 101 is located and the inner surface on which the second mounting portion 101 is located are first described later. A plurality of bearing members 130 are coupled to support the electron 200 and the second rotor 300 in a state capable of axial rotation.

The first rotor 200 is a shaft member that is inserted into the drive case 100 to be inserted into one end of the drive shaft 110 outside. The first rotor 200 is axially rotatable by the bearing member 130 provided in the drive case 100 while being disposed on the first installation unit 101 of the drive case 100. Connection is installed. At this time, the inner surface of the first rotor 200 is installed to be spaced apart from the outer surface of the drive shaft 110, the first outer plate 630 and the first of the first power transmission unit 600 will be described later The inner plate 640 can be installed. In addition, the first rotor 200 is made of a tubular structure having a hollow with both ends open so as to be inserted into one end of the drive shaft 110, the outer surface of the first rotor 200 1 magnetic member 210 is fixedly coupled. Here, the first magnetic member 210 uses a permanent magnet.

The second rotor 300 is a shaft member that is inserted into the drive case 100 to be inserted into the other end of the drive shaft 110. The second rotor 300 is axially rotatable by the bearing member 130 provided in the drive case 100 while being disposed on the second installation part 102 of the drive case 100. Connection is installed. At this time, the inner surface of the second rotor 300 is installed to be spaced apart from the outer surface of the drive shaft 110, the second outer plate 730 and the second of the second power transmission unit 700 to be described later The inner plate 650 can be installed. In addition, the second rotor 300 is made of a tubular structure having a hollow so as to be inserted into the other end of the drive shaft 110, the second magnetic member (300) on the outer surface of the second rotor (300) 310 is fixedly coupled. Here, the second magnetic member 310 uses a permanent magnet.

The first stator 400 is inserted into the drive case 100 so as to be disposed outside the rotor 200. The first stator 400 is fixedly coupled to the drive case 100 so that the first stator 400 does not move while being disposed on the first installation unit 101 of the drive case 100. The first stator 400 has a structure in which an armature coil is wound around an iron core. When magnetic force is generated while power is supplied to the armature coil from the outside, the first stator 400 has a shaft in the first installation unit 101 of the driving case 100. The first rotor 200 is rotatably inserted to be rotatable.

The first stator 400 is inserted into the drive case 100 so as to be disposed outside the first rotor 200. The first stator 400 is fixedly coupled to the drive case 100 so that the first stator 400 does not move while being disposed on the first installation unit 101 of the drive case 100. The first stator 400 has a structure in which an armature coil is wound around an iron core, and when a magnetic force is generated while power is supplied to the armature coil from the outside, the first stator 400 has a shaft in the first installation part 101 of the driving case 100. Rotatingly drive the first rotor 200 is inserted rotatably.

The second stator 500 is inserted into the drive case 100 so as to be disposed outside the second rotor 300. The second stator 500 is fixedly coupled to the drive case 100 so that the second stator 500 does not move while being disposed on the second installation unit 102 of the drive case 100. The second stator 500 has a structure in which an armature coil is wound around an iron core, and when a magnetic force is generated while power is supplied to the armature coil from the outside, the second stator 500 includes a shaft in the second installation part 102 of the driving case 100. The second rotor 300 is rotatably driven to be rotatably inserted.

The first power transmission unit 600 transmits or disconnects the rotational driving force of the first rotor 200 to the drive shaft 110. That is, the first power transmission unit 600 is connected to the first rotor 200 and the drive shaft 110, the magnetic force is generated in the first stator 400 and the first rotor 200 The rotational driving force generated in the transmission to the drive shaft 110 to be rotated. In addition, the first power transmission unit 600 causes the first rotor 200 and the drive shaft 110 to be disconnected, so that magnetic force is generated in the first stator 400 and the first rotor 200. Even if the rotational driving force is generated in the) may be a disconnected state that is not transmitted to the drive shaft (110). The first power transmission unit 600 is inserted into and disposed in the first installation unit 101 inside the driving case 100, and includes a first inner base 610, a first outer base 620, and a first The outer plate 630, the first inner plate 640, the first electromagnet 650, and the first return spring 660 are included.

The first inner base 610 is a member inserted into and coupled to one outer side surface of the drive shaft 110 in a state of supporting and supporting the first inner plate 620. Here, the first inner base 610 is formed in a tubular structure having a ring vertical cross-sectional shape so as to increase the contact area with the other end outer surface of the drive shaft 110 to maintain a stable fixed coupling state. A groove (not shown) may be recessed in the outer surface of the first inner base 610 to fix the inner end of the first inner plate 620 in an inserted state.

The first outer base 620 is inserted and coupled to an inner surface of the first rotor 200 to be disposed to face the first inner base 610 while supporting and supporting the first outer plate 630. to be. Here, the first outer base 620 is formed in a tubular structure having a ring vertical cross-sectional shape so as to increase the contact area with the inner surface of the first rotor 200 to maintain a stable fixed coupling state. Such a groove (not shown) may be formed in the inner surface of the first outer base 620 so that the outer end of the first outer plate 620 can be installed in an inserted state. In this case, the grooves of the first outer base 620 are recessed to be slidably moved by a predetermined distance in the first outer plate 620 in the axial direction of the drive shaft 110.

A plurality of first outer plates 630 are connected to an inner side surface of the first outer base 620. The first outer plate 630 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable coupling state by increasing an area when the first outer plate 630 is in contact with an opposing face portion of an adjacent first inner plate 640. Here, the first outer plate 630 is disposed on the inner surface of the first outer base 620 to be spaced apart from each other in the axial direction of the drive shaft 110. At this time, the outer end of each of the first outer plate 630 is connected to the groove of the first outer base 620 so as to reciprocally slide by a predetermined distance in the axial direction of the drive shaft 110.

A plurality of first inner plate 640 is connected to the outer surface of the first inner base 610 is installed. The first inner plate 640 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable coupling state by increasing an area when the first inner plate 640 is in contact with an opposite surface portion of the adjacent first outer plate 630. . Here, the first inner plate 640 is disposed on the outer surface of the first inner base 610 to be spaced apart from each other in the axial direction of the drive shaft 110. At this time, each inner end of the first inner plate 640 is coupled to the groove of the first outer base 620 in a fixed state.

Here, first friction members 641 may be coupled to both side surfaces of the first inner plate 640, that is, the surface portions facing the first outer plate 630. When the first friction member 641 is disposed to contact the surface portions of the first inner plate 640 and the first outer plate 630 that are in contact with each other, the first inner plate 640 and the The frictional force of the first outer plate 630 is increased to ensure a stable transmission of the rotational driving force of the first rotor 200 to the drive shaft 110.

The first electromagnet 650 pulls the first outer plate 630 in the axial direction of the drive shaft 110 while generating magnetic force when the power is supplied from the outside. That is, the first electromagnet 650 maintains the state in which the first outer plate 630 is in close contact with the first inner plate 640 to control the rotational driving force of the first rotor 200 by the driving shaft 110. To be passed). The first electromagnet 650 is fixedly coupled to the inner side of the other end of the driving case 100 so as to be adjacent to the first outer plate 630 disposed at the edge of the first outer base 620. do.

The first return spring 660 is in close contact with the first outer plate 630 with the first inner plate 640 due to the magnetic force generated by the first electromagnet 650, and then the first electromagnet 650. In order to stop the generation of magnetic force, the first outer plate 630 is spaced apart from the first inner plate 640. The first return spring 660 is connected between the first outer plates 630 disposed adjacent to each other in a state in which they face each other, so as to elastically support the first outer plates 630 adjacent to each other. do. As such, the first return spring 660 causes the first outer plate 630 to return to its original position when there is no magnetic force generated by the first electromagnet 650.

The second power transmission unit 700 transmits or disconnects the rotational driving force of the second rotor 300 to the drive shaft 110. That is, the second power transmission unit 700 is connected to the second rotor 300 and the drive shaft 110, the magnetic force is generated in the second stator 500 and the second rotor 300 The rotational driving force generated in the transmission to the drive shaft 110 to be rotated. In addition, the second power transmission unit 700 causes the second rotor 300 and the drive shaft 110 to be disconnected, so that a magnetic force is generated in the second stator 500 and the second rotor 300. Even if the rotational driving force is generated in the) may be a disconnected state that is not transmitted to the drive shaft (110). The second power transmission unit 700 is inserted into the second installation unit 102 inside the driving case 100, and includes a second inner base 710, a second outer base 720, and a second one. The outer plate 730, the second inner plate 740, the second electromagnet 750, and the second return spring 760 are included.

The second inner base 710 is a member inserted into and coupled to the outer side of the other end of the drive shaft 110 in a state of supporting and supporting the second inner plate 720. Here, the second inner base 710 is formed in a tubular structure having a ring vertical cross-sectional shape so as to increase the contact area with the other end outer surface of the drive shaft 110 to maintain a stable fixed coupling state. The outer surface of the second inner base 710 may be provided with a recess (not shown) to fix the inner end of the second inner plate 720 in an inserted state.

The second outer base 720 is inserted and coupled to an inner surface of the second rotor 300 to be disposed to face the second inner base 710 while supporting and supporting the second outer plate 730. to be. Here, the second outer base 720 is formed in a tubular structure having a ring vertical cross-sectional shape so as to increase the contact area with the inner surface of the second rotor 300 to maintain a stable fixed coupling state. A groove (not shown) may be formed in the inner side surface of the second outer base 720 so that the outer end portion of the second outer plate 720 may be installed in an inserted state. In this case, the groove of the second outer base 720 is recessed to be slidably moved by a predetermined distance in each of the second outer plate 720 in the axial direction of the drive shaft 110.

A plurality of the second outer plate 730 is connected to the inner surface of the second outer base 720. The second outer plate 730 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable coupling state by increasing an area when the second outer plate 730 comes into contact with an opposing face portion of an adjacent second inner plate 740. Here, the second outer plate 730 is disposed on the inner surface of the second outer base 720 to be spaced apart from each other by a predetermined interval in the axial direction of the drive shaft 110. At this time, the outer end of each of the second outer plate 730 is connected to the groove of the second outer base 720 so as to reciprocally slide by a predetermined distance in the axial direction of the drive shaft 110.

A plurality of second inner plate 740 is connected to the outer surface of the second inner base 710 is installed. The second inner plate 740 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable coupling state by increasing an area when the second inner plate 740 is in contact with an opposite surface portion of the adjacent second outer plate 730. . Here, the second inner plate 740 is disposed on the outer surface of the second inner base 710 to be spaced apart from each other in the axial direction of the drive shaft 110. At this time, the inner end of each of the second inner plate 740 is coupled to the groove of the second outer base 720 in a fixed state.

Here, the second friction member 741 may be coupled to both side surfaces of the second inner plate 740, that is, the surface portion facing the second outer plate 730. When the second friction member 741 is disposed to contact the surface portions of the second inner plate 740 and the second outer plate 730 that are in contact with each other, the second inner plate 740 and the The frictional force of the second outer plate 730 is increased to ensure a stable transmission of the rotational driving force of the second rotor 300 to the drive shaft 110.

The second electromagnet 750 pulls the second outer plate 730 in the axial direction of the drive shaft 110 while generating magnetic force when the power is supplied from the outside. That is, the second electromagnet 750 maintains the state in which the second outer plate 730 is in close contact with the second inner plate 740 to maintain the rotational driving force of the second rotor 300 on the driving shaft 110. To be passed). The second electromagnet 750 is coupled to the driving case 100 at an inner side in a fixed state so as to be adjacent to the second outer plate 730 disposed at the edge of the second outer base 720. do.

The second return spring 760 is in close contact with the second outer plate 730 with the second inner plate 740 due to the magnetic force generated by the second electromagnet 750, and then the second electromagnet 750. In order to stop the generation of magnetic force, the second outer plate 730 is spaced apart from the second inner plate 740. The second return spring 760 is connected between the second outer plates 730 disposed adjacent to each other in a state in which they face each other, so as to elastically support the second outer plates 730 adjacent to each other. do. As such, when the second return spring 760 does not generate magnetic force of the second electromagnet 750, the second return spring 760 returns the second outer plate 730 to its original position.

As such, the electric vehicle driving apparatus according to an embodiment may selectively rotate only one of the first rotor 200 or the second rotor 300 to rotate the driving shaft 110. The first rotor 200 and the second rotor 300 may be simultaneously driven to rotate to rotate the drive shaft 110. Here, the rotational driving force generated by the first rotor 200 and the second rotor 300 in a state in which power of the same size is supplied to the first stator 400 and the second stator 500 from the outside. The rotational driving force generated at) may be different. That is, the drive shaft 110 for finally outputting the rotational force to the axles (10, 11) of the electric vehicle in the state that the same size of power supplied from the outside to the first stator 400 and the second stator (500). Rotation force generated in the first rotor 200 adjacent to one edge portion of the) is greater than the rotation force generated in the second rotor 300, so that the transmission efficiency can be maintained large.

Such, the driving force generated in the driving apparatus for the electric vehicle of one embodiment, after transmitting the axles (10, 11) of the electric vehicle through the reducer (800) and the differential (900), wheels (20, 21) Will rotate. In this case, the speed reducer 800 is connected to one end of the drive shaft 110 in a state in which the input shaft 811 connected to the drive shaft 110 is disposed on the same axis as the drive shaft 110. The reduction gear 800 may include a reduction case 810, an intermediate shaft 820, and a reduction gear 830. Here, the deceleration case 810 is connected to one end outer surface of the drive case 100. The deceleration case 810 is a cylindrical member having a space portion inside the input shaft 811, the intermediate shaft 820, and the reduction gear 830.

In addition, an input shaft 811 coupled to one end portion of the driving shaft 110 is connected to the deceleration case 810 so as to be rotatable. At this time, one edge portion of the drive shaft 110 and the end portion of the input shaft 811 may be connected in a spline structure. Here, a bearing member 812 is fixedly installed inside the deceleration case 810 to support the input shaft 811 and the intermediate shaft 820 so as to be rotatable.

The intermediate shaft 820 is axially rotatable through the bearing member 812 inside the deceleration case 810 in a state arranged in parallel with the input shaft 811. The intermediate shaft 820 is connected to the input shaft 811 through the reduction gear 830 to rotate by receiving the rotational force of the input shaft 811. Here, one side of the intermediate shaft 820 is connected to the differential 900, the output gear 821 for transmitting a rotational force to the differential 900 may be provided with a coupling.

The reduction gear 830 is coupled to the other side of the intermediate shaft 820 in a fixed state, and is disposed inside the reduction case 810 to be aligned with one side of the input shaft 810, and the input shaft 810. The rotational force of the to be transmitted to the intermediate shaft 820.

As such, the rotational driving force transmitted to the speed reducer 800 through the drive shaft 110 is transmitted to the differential gear mechanism 910 of the differential 900, and then the left and

right axles

10 and 11 of the electric vehicle. Is transmitted to the

wheels

20 and 21 to be rotated. Here, the differential 900 can be applied to the structure of the differential generally used in automobiles, the description of the detailed structure will be omitted.

Referring to the operation according to the driving situation of the electric vehicle drive device of an embodiment configured as described above are as follows.

First, when the driver wants to start while the driver turns on the ignition key of the electric vehicle, a large torque is required, so as to secure a driving force for moving the electric vehicle. 200 and the second rotor 300 to generate a rotational driving force at the same time.

That is, the first stator 400 and the second stator 500, and the first electromagnet 650 of the first power transmission unit 600 and the second electromagnet of the second power transmission unit 700 ( 750 is powered. Then, the first outer plate 630 of the first power transmission unit 600 and the first inner plate 640 are in contact with each other, and the second outer plate of the second power transmission unit 700 ( 730 and the second inner plate 740 are in contact with each other. In this state, the driving force generated while the first rotor 200 and the second rotor 300 are rotated is transmitted to the driving shaft 110 so that the electric vehicle can be started.

Subsequently, when the speed of the electric vehicle is increased by manipulating the accelerator pedal of the electric vehicle, the torque required by the inertia of the electric vehicle decreases while the rotation speed for increasing the speed of the electric vehicle should be high. Accordingly, the driving force required while the electric vehicle is traveling is small, but only the operation of the second stator 500 and the second rotor 300 capable of high-speed rotation is sufficient. Will be judged in Accordingly, the power to the first electromagnet 650 and the first stator 400 of the first power transmission unit 600 is cut off and the first outer plate 630 and the first inner plate 640 are mutually While being released from the contact state, the transmission of the rotational driving force to the drive shaft 110 through the first stator 400 is in a disconnected state.

In addition, when driving uphill according to the driving condition of the electric vehicle, if it is determined by the traveling controller of the electric vehicle that additional torque is required, the first rotor while the power is supplied to the first stator (400) Let 200 be driven to rotate. Subsequently, when the rotational speed of the first rotor 200 becomes equal to the traveling speed of the electric vehicle, power is supplied to the first electromagnet 650 of the first power transmission unit 600 to provide the first power. The outer plate 630 and the first inner plate 640 are in contact with each other to transmit a rotational driving force to the drive shaft 110.

Thereafter, when the driving of the electric vehicle is completed and the ignition is turned off, the first electromagnet of the first stator 400, the second stator 500, and the first power transmission unit 600. 650 and the power supply to the second electromagnet 750 of the second power transmission unit 700 is cut off. Then, the rotational driving force generation of the first rotor 200 and the second rotor 300 is stopped, and the first outer plate 630 and the first inner of the first power transmission unit 600 are stopped. The plate 640 is spaced apart from each other, and the second outer plate 730 and the second inner plate 740 of the second power transmission unit 700 are spaced apart from each other, thereby transmitting rotational driving force to the drive shaft 110. Without this, the braking of the electric vehicle is achieved stably.

As such, the driving device for an electric vehicle of the embodiment includes the first rotor 200, the first stator 400, and the second time for generating a separate rotational force inside the driving case 100. The first power transmission unit 600 and the second power transmission unit 700 selectively transmit the respective rotational force to the drive shaft 110 with the electron 300 and the second stator 500 installed. In addition, the optimum driving performance can be realized according to the driving conditions of the electric vehicle, and the structure is simple, thereby facilitating the installation work by occupying a small amount of mounting space when the electric vehicle is mounted.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A drive case provided with a drive shaft rotatably inside thereof;

A first rotor rotatably connected to the inside of the drive case in a state in which one end of the driving shaft is inserted and disposed;

A second rotor rotatably connected to the inside of the drive case while being inserted into the other end of the drive shaft;

A first stator fixedly coupled to the driving case so as to be disposed outside the first rotor;

A second stator fixedly coupled to the driving case so as to be disposed outside the second rotor;

A first power transmission unit installed inside the drive case and configured to transmit or disconnect power of the first rotor to the drive shaft; And

Is installed inside the drive case, the driving device for an electric vehicle including a second power transmission unit for transmitting or disconnecting the power of the second rotor to the drive shaft.
The method according to claim 1,

The first power transmission unit,

A first inner base fixedly coupled to an outer surface of one end of the drive shaft;

A first outer base fixedly coupled to the inner side of the first rotor,

A plurality of first outer plates connected to the inner side of the first outer base so as to be spaced apart from each other in a slidable state in the axial direction of the drive shaft;

A plurality of first inner plates fixedly coupled to an outer surface of the first inner base so as to be inserted between the first outer plates;

The first outer plate is coupled to one end of the driving case so as to be adjacent to the first outer plate, and the first outer plate is pulled and moved in the axial direction of the driving shaft while generating magnetic force when the power is supplied from the outside. A first electromagnet for tightly coupling the plate to the first inner plate, and

It is connected between the first outer plate facing each other, when the power supply of the first electromagnet is interrupted, includes a first return spring for elastically supporting the first outer plate so that the first outer plate is returned to its original position Driving device for electric vehicles.
The method according to claim 2,

The first friction member is coupled to both sides of the first inner plate facing the first outer plate, the driving device for an electric vehicle.
The method according to claim 1,

The second power transmission unit,

A second inner base fixedly coupled to an outer surface of the other end of the drive shaft;

A second outer base fixedly coupled to the inner side of the second rotor,

A plurality of second outer plates connected to the inner side of the second outer base so as to be spaced apart from each other in a slidable state in the axial direction of the drive shaft;

A plurality of second inner plates fixedly coupled to an outer surface of the second inner base so as to be inserted between the second outer plates;

The second outer plate is coupled to the other end of the driving case so as to be disposed adjacent to the second outer plate, and the second outer plate is pulled and moved in the axial direction of the drive shaft while generating magnetic force when the power is supplied from the outside. A second electromagnet for tightly coupling the plate to the second inner plate, and

A second return spring elastically supporting the second outer plate such that the second outer plate is returned to its original position when the power supply of the second electromagnet is cut off. Driving device for electric vehicles.
The method according to claim 4,

Driving device for an electric vehicle is provided with a second friction member is coupled to both sides of the second inner plate facing the second outer plate.
The method according to claim 1,

When the power of the same size from the outside to the first stator and the second stator, the rotational force of the first rotor and the rotational force of the second rotor is generated differently.
The method according to claim 6,

And a rotational force of the first rotor is greater than that of the second rotor.
The method according to claim 1,

And a reduction gear connected to one end of the driving shaft in a state in which the driving shaft is disposed on the same axis as the driving shaft and provided with an input shaft receiving the rotational force of the driving shaft.
The method according to claim 8,

The reducer,

A deceleration case having the input shaft connected to the shaft in a rotatable manner;

An intermediate shaft installed to be rotatably connected to the inside of the reduction case in a state in which the input shaft is disposed side by side;

The driving device for an electric vehicle comprising a reduction gear that is coupled to one side of the input shaft in a state coupled to the intermediate shaft, to transmit the rotational force of the input shaft to the intermediate shaft.