KR101667974B1 - Driving apparatus for electric vehicle - Google Patents

Driving apparatus for electric vehicle Download PDF

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Publication number
KR101667974B1
KR101667974B1 KR1020150115388A KR20150115388A KR101667974B1 KR 101667974 B1 KR101667974 B1 KR 101667974B1 KR 1020150115388 A KR1020150115388 A KR 1020150115388A KR 20150115388 A KR20150115388 A KR 20150115388A KR 101667974 B1 KR101667974 B1 KR 101667974B1
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KR
South Korea
Prior art keywords
rotor
drive shaft
shaft
plate
driving
Prior art date
Application number
KR1020150115388A
Other languages
Korean (ko)
Inventor
박병균
구진회
Original Assignee
주식회사 디아이씨
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Publication date
Application filed by 주식회사 디아이씨 filed Critical 주식회사 디아이씨
Priority to KR1020150115388A priority Critical patent/KR101667974B1/en
Priority to PCT/KR2015/010357 priority patent/WO2017030234A1/en
Application granted granted Critical
Publication of KR101667974B1 publication Critical patent/KR101667974B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/348—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed
    • B60K17/35—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed including arrangements for suppressing or influencing the power transfer, e.g. viscous clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles

Abstract

A first rotor rotatably connected to the inside of the drive case in a state of being inserted and disposed outside one end of the drive shaft; a second rotor rotatably inserted and disposed outside the other end of the drive shaft; A second rotor rotatably connected to the inside of the drive case, a first stator fixedly coupled to the drive case to be disposed outside the first rotor, a second stator fixedly coupled to the drive case to be disposed outside the second rotor, A stator, a first power transmission part provided inside the drive case for transmitting or disconnecting the power of the first rotor to or from the drive shaft, a second power transmission part provided inside the drive case for transmitting or disconnecting the power of the second rotor to the drive shaft, A drive device for an electric vehicle including a power transmission portion is provided.
Such a drive system for an electric vehicle includes a first rotor and a first stator for generating a separate rotational force inside the drive case and a second rotor and a second stator in a state where the second rotor and the second stator are provided, 2 power transmission portion selectively transmit the rotational force to the drive shaft. As a result, the optimum driving performance can be realized in accordance with the driving conditions of the electric vehicle, and the structure is simple, So that the installation work can be facilitated.

Description

[0001] Driving apparatus for electric vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a driving apparatus for an electric vehicle, which has several power characteristics so as to realize an optimum power according to a driving situation of a vehicle and enables efficient operation according to the driving conditions of the vehicle.

Recently, interest in compact electric vehicles has been growing as a means of short-distance transportation to replace vehicles using internal combustion engines, along with depletion of fossil fuels.

Generally, unlike an internal combustion engine, a driving source of an electric vehicle generally uses a gear box having an electric motor and a constant reduction gear ratio because the maximum torque at a low speed is high and the maximum torque decreases at a high speed.

Such an electric vehicle can realize all the power with one electric motor to secure the driving performance. Accordingly, the electric motor of the electric vehicle must have a capacity large enough to drive the vehicle, and a multi-speed transmission is used to realize the acceleration performance and the backing ability.

However, when a single electric motor is used, a large-capacity motor is used to satisfy all driving patterns according to the driving situation. In a normal driving situation, only a part of the motor performance is used, and energy efficiency is lowered and unnecessary power is consumed . Thus, the control of the speed and the torque is not easy according to the driving situation, and there is a problem that the power loss is large.

In order to solve this problem, a parallel type in which two motors are installed in parallel is used, but in the parallel type, two motors are connected and arranged in a separate structure, thereby occupying a large space for mounting, There is a problem that it takes a lot of time.

In addition, when two motors are installed in parallel, two motors are connected to a single gear box. When two motors are synchronized with the same number of revolutions, a driving force shock occurs. As a result, There is a problem that noise is generated.

Such an apparatus for driving an electric vehicle having a conventional parallel structure is disclosed in Korean Patent Registration No. 10-1454870 (Apr. 20, 2014).

An object of the present invention is to provide a driving apparatus for an electric automobile which occupies a small space for mounting, is easy to install in a vehicle, and can realize optimum driving performance in accordance with driving conditions of the vehicle.

A first rotor rotatably connected to the inside of the drive case in a state of being inserted and disposed outside the one end of the drive shaft; a second rotor rotatably connected to the outside of the other end of the drive shaft; A second rotor rotatably connected to the inside of the drive case in a deployed state, a first stator fixedly coupled to the drive case to be disposed outside the first rotor, A second stator which is fixedly coupled to the drive case, a first power transmission part provided inside the drive case for transmitting or disconnecting the power of the first rotor to the drive shaft, And a second power transmitting portion for transmitting or disconnecting the power of the rotor to the drive shaft.

A driving apparatus for an electric vehicle according to the present invention includes a first rotor and a first stator for generating a separate rotating force inside a drive case, a first stator and a second stator, And the second power transmission unit selectively transmits the rotational force to the drive shaft. Accordingly, the optimum driving performance can be realized in accordance with the driving conditions of the electric vehicle, and the structure is simple, So that the installation work can be facilitated.

1 is a structural cross-sectional view of a driving apparatus for an electric vehicle according to an embodiment of the present invention.
Fig. 2 is an installation state view of Fig. 1. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a structural cross-sectional view of a driving apparatus for an electric vehicle according to an embodiment of the present invention, and Fig. 2 is an installation state view 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, 2 stator 500, a first power transmission unit 600, and a second power transmission unit 700.

The drive case 100 includes a first rotor 200, a second rotor 300, a first stator 400, a second stator 500, a first power transmission unit 600, 2 is a tubular member having a space portion 100a on the inner side so that the power transmitting portion 700 can be installed. The space portion 100a of the drive case 100 includes a first mounting portion 101 for mounting the first rotor 200, the first stator 400 and the first power transmitting portion 600, And a second mounting portion 102 for mounting the second rotator 300, the second stator 500, and the second power transmitting portion 700.

The driving force generated through the first rotator 200, the first stator 400 and the first power transmission unit 600 and the driving force generated by the second rotor 300, which will be described later, The second stator 500, and the second power transmission unit 700. The driving shaft 110 is rotatably connected to the driving shaft 110 through a shaft. One end of the driving shaft 110 is located at the first mounting portion 101 of the driving case 100 and the other end of the driving shaft 110 is located at the second mounting portion 102. The inner surface of the driving case 100, more specifically, the inner surface of the first mounting portion 101 and the inner surface of the second mounting portion 101, A plurality of bearing members 120 are coupled and supported so as to connect and support the respective end portions in a rotatable manner. In addition, on 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, A plurality of bearing members 130 for coupling and supporting the electron 200 and the second rotor 300 in a rotatable state are coupled.

The first rotor 200 is a shaft member inserted into the drive case 100 so as to be inserted into one end of the drive shaft 110. The first rotor 200 is rotatably supported by a bearing member 130 provided on the drive case 100 while being disposed on the first mounting portion 101 of the drive case 100 Connection is established. The inner surface of the first rotor 200 is spaced apart from the outer surface of the drive shaft 110 so that the first outer plate 630 and the first outer plate 630 of the first power transmission unit 600, The inner plate 640 can be installed. In addition, the first rotor 200 has a tube structure having hollow openings at both ends so as to be inserted and disposed outside the one end of the drive shaft 110, The one magnetic force member 210 is fixedly coupled. Here, the first magnetic force member 210 uses a permanent magnet.

The second rotor 300 is a shaft member inserted into the drive case 100 so as to be inserted and disposed outside the other end of the drive shaft 110. The second rotor 300 is rotatably supported by the bearing member 130 provided in the drive case 100 while being disposed on the second mounting portion 102 of the drive case 100 Connection is established. The inner surface of the second rotor 300 is spaced apart from the outer surface of the drive shaft 110 so that the second outer plate 730 and the second outer plate 730 of the second power transmission unit 700, The inner plate 650 can be installed. In addition, the second rotor 300 has a tube structure having a hollow to be inserted and disposed outside the other end of the drive shaft 110, and a second magnetic force member (not shown) is formed on the outer surface of the second rotor 300 310 are fixedly coupled. Here, the second magnetic force member 310 uses a permanent magnet.

The first stator 400 is inserted into the drive case 100 so as to be disposed on the outer side of the rotor 200. The first stator 400 is fixedly coupled to the driving case 100 so as not to move in a state where the first stator 400 is disposed on the first mounting portion 101 of the driving case 100. When the magnetic force is generated while power is supplied from the outside to the armature coil, the first stator 400 of the drive case 100 is provided with a shaft So that the first rotor (200) rotatably inserted and disposed is axially rotated.

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 driving case 100 so as not to move in a state where the first stator 400 is disposed on the first mounting portion 101 of the driving case 100. When the magnetic force is generated while power is supplied from the outside to the armature coil, the first stator 400 of the drive case 100 is provided with a shaft So that the first rotor (200) rotatably inserted and arranged is rotationally driven.

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 driving case 100 so as not to move in a state where the second stator 500 is disposed on the second mounting portion 102 of the driving case 100. When the magnetic force is generated while power is supplied from the outside to the armature coil, the second stator 500 of the drive case 100 is provided with a shaft So that the second rotors 300 rotatably inserted and arranged are rotationally driven.

The first power transmission unit 600 transmits or disconnects the rotational driving force of the first rotor 200 to the driving shaft 110. That is, the first power transmission unit 600 connects the first rotor 200 and the drive shaft 110 to generate a magnetic force in the first stator 400, and the first rotor 200 To the driving shaft 110 to rotate. In addition, the first power transmission unit 600 disconnects the first rotor 200 and the driving shaft 110 to generate a magnetic force in the first stator 400, and the first rotor 200 Even if a rotational driving force is generated in the driving shaft 110, the driving shaft 110 can be disconnected. The first power transmitting portion 600 is inserted into the first mounting portion 101 inside the driving case 100 and includes a first inner base 610, a first outer base 620, An outer plate 630, a first inner plate 640, a first electromagnet 650, and a first return spring 660.

The first inner base 610 is inserted and coupled to the outer surface of one end of the driving shaft 110 in a state where the first inner plate 620 is connected and supported. The first inner base 610 has a tubular structure having a ring vertical cross-sectional shape so as to maintain a stable fixed engagement state by increasing a contact area with the outer surface of the other end of the drive shaft 110. A groove (not shown) may be formed on the outer surface of the first inner base 610 so as 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 the inner surface of the first rotor 200 so as to be opposed to the first inner base 610 in a state where the first outer plate 630 is connected and supported. to be. Here, the first outer base 620 is formed in a tubular structure having a ring vertical cross-sectional shape so that the contact area with the inner surface of the first rotor 200 can be increased to maintain a stable fixed engagement state. A groove (not shown) may be formed on the inner surface of the first outer base 620 to allow the outer end of the first outer plate 620 to be inserted and inserted. At this time, the grooves of the first outer base 620 are formed so as to be slidable by a certain distance in the axial direction of the driving shaft 110, so that each first outer plate 620 is slidable.

A plurality of first outer plates 630 are connected to the inner 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 engagement state by increasing an area when the first outer plate 630 is in contact with the facing surface portions of the adjacent first inner plates 640. Here, the first outer plate 630 is spaced apart from the inner surface of the first outer base 620 by a predetermined distance in the axial direction of the drive shaft 110. At this time, the outer end of each of the first outer plates 630 is connected to the groove of the first outer base 620 so as to be reciprocally slidable by a certain distance in the axial direction of the driving shaft 110.

A plurality of the first inner plates 640 are connected to the outer surface of the first inner base 610. The first inner plate 640 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable engagement state by increasing an area when the first inner plate 640 is in contact with the facing surface portions of the adjacent first outer plates 630 . The first inner plate 640 is disposed on the outer surface of the first inner base 610 at a predetermined interval in the axial direction of the drive shaft 110. At this time, the inner end of each of the first inner plates 640 is fixedly connected to the groove of the first outer base 620.

Here, a first friction member 641 may be coupled to both side surfaces of the first inner plate 640, that is, a surface portion facing the first outer plate 630. The first inner plate 640 and the first outer plate 630 are disposed such that the first friction plate 641 and the first outer plate 630 are in contact with each other. The frictional force of the first outer plate 630 is increased and the rotational driving force of the first rotator 200 is transmitted to the driving shaft 110 in a stable manner.

When the first electromagnet 650 is supplied with power from the outside, the first outer plate 630 is pulled in the axial direction of the driving shaft 110 while generating a magnetic force. That is, the first electromagnet 650 maintains the first outer plate 630 in tight contact with the first inner plate 640, so that the rotational driving force of the first rotor 200 is transmitted to the driving shaft 110 ). The first electromagnet 650 is fixedly coupled to the inner surface 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 rotated by the first electromagnet 650 in a state where the first outer plate 630 is closely contacted with the first inner plate 640 by the magnetic force of the first electromagnet 650, 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 mutually facing state to elastically support between the adjacent first outer plates 630 do. Thus, the first return spring 660 returns the first outer plate 630 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 driving shaft 110. That is, the second power transmission unit 700 connects the second rotor 300 and the drive shaft 110 to generate a magnetic force in the second stator 500, and the second rotor 300 To the driving shaft 110 to rotate. The second power transmission unit 700 disconnects the second rotor 300 and the drive shaft 110 to generate a magnetic force in the second stator 500 and the second rotor 300 Even if a rotational driving force is generated in the driving shaft 110, the driving shaft 110 can be disconnected. The second power transmitting portion 700 is inserted into the second mounting portion 102 inside the driving case 100 and inserted into the second inner base 710, the second outer base 720, An outer plate 730, a second inner plate 740, a second electromagnet 750, and a second return spring 760.

The second inner base 710 is a member inserted and coupled to the outer surface of the other end of the driving shaft 110 in a state where the second inner plate 720 is connected and supported. Here, the second inner base 710 is formed in a tubular structure having a ring vertical cross-sectional shape so as to maintain a stable fixed engagement state by increasing a contact area with the outer surface of the other end of the drive shaft 110. A groove (not shown) may be formed on the outer surface of the second inner base 710 so as 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 the inner surface of the second rotor 300 so as to be opposed to the second inner base 710 in a state in which the second outer plate 730 is connected and supported. to be. Here, the second outer base 720 is formed in a tubular structure having a ring vertical cross-sectional shape so that a contact area with the inner surface of the second rotor 300 can be increased to maintain a stable fixed engagement state. A groove (not shown) may be formed on the inner side surface of the second outer base 720 to allow the outer end of the second outer plate 720 to be inserted and inserted. At this time, the grooves of the second outer base 720 are recessed so as to be slidable by a certain distance in the axial direction of the drive shaft 110 of each second outer plate 720.

A plurality of second outer plates 730 are 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 that the second outer plate 730 can have a large area when it is in contact with the facing surface of the adjacent second inner plate 740, Here, the second outer plate 730 is spaced apart from the inner surface of the second outer base 720 by a predetermined distance in the axial direction of the drive shaft 110. At this time, the outer end of each second outer plate 730 is connected to the groove of the second outer base 720 so as to be reciprocally slidable by a certain distance in the axial direction of the driving shaft 110.

A plurality of second inner plates 740 are connected to the outer surface of the second inner base 710. The second inner plate 740 is formed in a plate structure having a ring vertical cross-sectional shape so as to maintain a stable engagement state by increasing an area when the second inner plate 740 is in contact with the facing surface portions of the adjacent second outer plates 730 . Here, the second inner plate 740 is disposed on the outer surface of the second inner base 710 at a predetermined interval in the axial direction of the drive shaft 110. At this time, the inner end of each second inner plate 740 is fixedly connected to the groove of the second outer base 720.

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

When the second electromagnet 750 is supplied with power from the outside, the second outer plate 730 is pulled in the axial direction of the driving shaft 110 while generating a magnetic force. That is, the second electromagnet 750 keeps the second outer plate 730 in tight contact with the second inner plate 740 so that the rotational driving force of the second rotor 300 is transmitted to the driving shaft 110 ). The second electromagnet 750 is fixedly coupled to the inner surface of the first end of the driving case 100 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 rotated by the second electromagnet 750 in a state where the second outer plate 730 is closely contacted with the second inner plate 740 by the generation of the magnetic force of the second electromagnet 750, 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 mutually facing state to elastically support between the adjacent second outer plates 730 do. Thus, the second return spring 760 restores the second outer plate 730 to its original position when there is no magnetic force generated by the second electromagnet 750.

In this way, the driving apparatus for an electric vehicle according to an embodiment of the present invention can selectively rotate only the first rotor 200 and the second rotor 300 to rotate the driving shaft 110 , The first rotor (200) and the second rotor (300) are driven to rotate simultaneously so that the drive shaft (110) can be rotated. Here, the rotational driving force generated by the first rotor (200) and the rotational driving force generated by the second rotor (300) in a state where power of the same magnitude is externally supplied to the first stator (400) and the second stator ) May be different from each other. That is, when the power of the same magnitude is externally supplied to the first stator 400 and the second stator 500, the driving shaft 110 (or 110) which finally outputs the rotational force to the axles 10 and 11 of the electric vehicle The rotational force generated by the first rotor 200 adjacent to the one end of the second rotor 300 is greater than the rotational force generated by the second rotor 300,

The rotational driving force generated in the driving apparatus for an electric vehicle according to one embodiment is transmitted to the wheels 20 and 21 after the axles 10 and 11 of the electric vehicle are transmitted through the speed reducer 800 and the differential motor 900, . At this time, the speed reducer 800 is connected to one end of the driving shaft 110 in a state where the input shaft 811 connected to the driving shaft 110 is disposed on the same axis as the driving shaft 110. The decelerator 800 may include a deceleration case 810, an intermediate shaft 820, and a reduction gear 830. Here, the deceleration case 810 is coupled to the outer surface of one end of the driving case 100. The deceleration case 810 is a tubular member having a space portion on the inner side so that the input shaft 811, the intermediate shaft 820, and the reduction gear 830 can be installed.

An input shaft 811 connected to a rim portion of the driving shaft 110 is rotatably connected to the inner side of the deceleration case 810. At this time, one end of the driving shaft 110 and the end of the input shaft 811 may be spline coupled to each other. A bearing member 812, which rotatably supports the input shaft 811 and the intermediate shaft 820, is fixedly installed inside the deceleration case 810.

The intermediate shaft 820 is rotatably connected to the inner side of the deceleration case 810 through the bearing member 812 in a state where the intermediate shaft 820 is disposed in parallel with the input shaft 811. The intermediate shaft 820 is connected to the input shaft 811 through a reduction gear 830 and receives rotation force of the input shaft 811 to rotate. An output gear 821 connected to the differential motor 900 and transmitting the rotational force to the differential motor 900 may be coupled to one side of the intermediate shaft 820.

The reduction gear 830 is fixedly coupled to the other side of the intermediate shaft 820 and is disposed inside the reduction case 810 so as to be aligned with one side of the input shaft 810, To be transmitted to the intermediate shaft (820).

The rotational driving force transmitted to the speed reducer 800 through the driving shaft 110 is transmitted to the differential gear mechanism 910 of the differential motor 900 and then transmitted to the left and right axles 10, So that the wheels 20 and 21 are rotated. Here, the differential synchronizer 900 can be applied to a differential synchronous motor, which is generally used in an automobile, and a detailed description of the structure will be omitted.

An operation of the driving apparatus for an electric vehicle according to the present invention will now be described.

First, when the driver wants to start the electric vehicle in a state where the ignition key of the electric vehicle is turned on, a large torque is required. Therefore, in order to secure the driving force for moving the electric vehicle, 200 and the second rotor 300 simultaneously generate a rotational driving force.

That is, the first stator 400, the second stator 500, the first electromagnet 650 of the first power transmission portion 600, and the second electromagnet of the second power transmission portion 700 750 < / RTI > The first outer plate 630 and the first inner plate 640 of the first power transmission unit 600 are in contact with each other and the second outer plate 630 of the second power transmission unit 700 730 and the second inner plate 740 are brought into mutual contact. In this state, the driving force generated by the rotation of the first and second rotors 200 and 300 is transmitted to the driving shaft 110, so that the electric vehicle can be started.

Thereafter, when the speed of the electric vehicle is increased by operating the accelerator pedal of the electric vehicle, the torque required by the inertia of the electric vehicle is reduced, while the number of revolutions for increasing the speed of the electric vehicle must be high. Accordingly, the driving force required during the traveling of the electric vehicle is sufficient to operate only the second stator 500 and the second rotor 300, which are small in the generated rotational force but capable of high-speed rotation, City). 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 electrically connected to each other The transmission of the rotational driving force to the driving shaft 110 through the first stator 400 is disconnected.

When the running controller of the electric vehicle determines that an additional high torque is required when the vehicle runs uphill according to the running state of the electric vehicle, power is supplied to the first stator 400, (200) is rotationally driven. Thereafter, when the rotation speed of the first rotor 200 becomes equal to the running speed of the electric vehicle, power is supplied to the first electromagnet 650 of the first power transmission portion 600, The outer plate 630 and the first inner plate 640 are in contact with each other to transmit the rotational driving force to the driving shaft 110.

The first stator 400 and the second stator 500 and the first electromagnet 500 of the first power transmission unit 600 and the second electromagnet 500 of the first power transmission unit 600 are turned on when the running of the electric vehicle is completed, The second electromagnet 750 of the second power transmission unit 700 is cut off. Then, the rotation driving force of the first and second rotors 200 and 300 is stopped, and the first outer plate 630 of the first power transmitting unit 600 and the first inner plate 630 of the first power transmitting unit 600 are rotated, The second outer plate 730 and the second inner plate 740 of the second power transmission unit 700 are spaced apart from each other while the plates 640 are spaced apart from each other, The braking of the electric vehicle can be stably performed.

As described above, the driving apparatus for an electric vehicle according to an embodiment of the present invention includes the first rotor 200, the first stator 400, and the second stator 400, which generate a separate rotational force in the drive case 100, The first power transmission unit 600 and the second power transmission unit 700 selectively transmit rotational force to the drive shaft 110 with the electrons 300 and the second stator 500 installed, So that the optimum driving performance can be realized in accordance with the driving conditions of the electric vehicle, and the structure is simple, so that the installation work can be facilitated owing to a small installation space when mounted on the electric vehicle.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: drive case 110: drive shaft
200: first rotor 300: second rotor
400: first stator 500: second stator
600: first power transmitting portion 610: first inner base
620: first outer base 630: first outer plate
640: first inner plate 650: first electromagnet
660: first return spring 700: second power transmission portion
710: second inner base 720: second outer base
730: second outer plate 740: second inner plate
750: second electromagnet 760: second return spring
800: Reduction gear 900:

Claims (9)

A drive case having a drive shaft provided therein so as to be rotatable about an axis;
A first rotor rotatably connected to the inside of the drive case in a state of being inserted and disposed outside the one end of the drive shaft;
A second rotor rotatably connected to the inside of the drive case while being inserted and disposed outside the other end of the drive shaft;
A first stator fixedly coupled to the drive case to be disposed outside the first rotor;
A second stator fixedly coupled to the drive case to be disposed outside the second rotor;
The first rotor and the drive shaft are connected to each other so that the rotational driving force generated by the first rotor is transmitted to the drive shaft to rotate the first and second rotors, A first power transmission unit for turning off the transmission to the drive shaft even when a rotational driving force is generated in the first rotor; And
And the second rotor is connected to the drive shaft so that the rotational driving force generated by the second rotor is transmitted to the drive shaft to rotate, or the second rotor and the drive shaft are disconnected And a second power transmitting portion that makes the second rotor rotate to a disengaged state in which transmission to the drive shaft is blocked even if a rotational driving force is generated in the second rotor. The method according to claim 1,
Wherein the first power transmitting portion includes:
A first inner base fixedly coupled to an outer surface of one end of the driving shaft,
A first outer base fixedly coupled to the inner surface of the first rotor,
A plurality of first outer plates connected to inner side surfaces of the first outer base so as to be spaced apart from each other in a state of being slidable in the axial direction of the drive shaft,
A plurality of first inner plates fixedly coupled to the outer surface of the first inner base so as to be inserted between the first outer plates,
The first outer plate is coupled to the inner side of one end of the driving case so as to be adjacent to the first outer plate, and when the power is supplied from the outside, the first outer plate is pulled in the axial direction of the driving shaft while generating a magnetic force, A first electromagnet for causing the plate to be tightly coupled with the first inner plate, and
And a first return spring connected between the first outer plates facing each other to elastically support the first outer plate so that the first outer plate is returned to its original position when the power supply to the first electromagnet is interrupted A driving device for an electric vehicle. The method of claim 2,
And a first friction member is coupled to both side surfaces of the first inner plate facing the first outer plate. The method according to claim 1,
The second power transmission unit includes:
A second inner base fixedly coupled to the outer surface of the other end of the drive shaft
A second outer base fixedly coupled to the inner surface of the second rotor,
A plurality of second outer plates connected to inner side surfaces of the second outer base so as to be spaced apart from each other in a state of being slidable in an axial direction of the drive shaft,
A plurality of second inner plates fixedly coupled to the outer surface of the second inner base to be inserted and disposed between the second outer plates,
The second outer plate is coupled to the other end of the driving case so as to be adjacent to the second outer plate, and when the power is supplied from the outside, the second outer plate is pulled in the axial direction of the driving shaft while generating a magnetic force, A second electromagnet for causing the plate to be tightly engaged with the second inner plate, and
And a second return spring connected between the second outer plates facing each other to elastically support the second outer plate so that the second outer plate is returned to its original position when the power supply of the second electromagnet is interrupted A driving device for an electric vehicle. The method of claim 4,
And a second friction member is coupled to both side surfaces of the second inner plate facing the second outer plate. The method according to claim 1,
Wherein when the power of the same magnitude is externally supplied to the first stator and the second stator, the rotational force of the first rotor and the rotational force of the second rotor are different from each other. The method of claim 6,
Wherein the rotational force of the first rotor is larger than the rotational force of the second rotor. The method according to claim 1,
Further comprising a speed reducer coupled to one end of the drive shaft in a state arranged on the same axis as the drive shaft and having an input shaft receiving the rotational force of the drive shaft. The method of claim 8,
The speed reducer includes:
A deceleration case having the input shaft axially rotatably connected to the inside thereof,
An intermediate shaft axially rotatably connected to the inner side of the reduction case in a state of being arranged in parallel with the input shaft,
And a reduction gear which is fitted to one side of the input shaft in a state of being coupled to the intermediate shaft and transmits the rotational force of the input shaft to the intermediate shaft.
KR1020150115388A 2015-08-17 2015-08-17 Driving apparatus for electric vehicle KR101667974B1 (en)

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