JPH07156673A - Driving gear for electric vehicle - Google Patents

Driving gear for electric vehicle

Info

Publication number
JPH07156673A
JPH07156673A JP30145193A JP30145193A JPH07156673A JP H07156673 A JPH07156673 A JP H07156673A JP 30145193 A JP30145193 A JP 30145193A JP 30145193 A JP30145193 A JP 30145193A JP H07156673 A JPH07156673 A JP H07156673A
Authority
JP
Japan
Prior art keywords
hollow shaft
electric vehicle
electric motor
shaft
device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP30145193A
Other languages
Japanese (ja)
Inventor
Hiroyuki Hirano
Shinichiro Kitada
Kiyonaru Ozaki
眞一郎 北田
清考 尾崎
弘之 平野
Original Assignee
Nissan Motor Co Ltd
日産自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd, 日産自動車株式会社 filed Critical Nissan Motor Co Ltd
Priority to JP30145193A priority Critical patent/JPH07156673A/en
Publication of JPH07156673A publication Critical patent/JPH07156673A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve car mountability and driving stability by mounting a rotor of an electric motor in a hollow shaft, and providing a differential gear in the hollow shaft, so as to decrease an operating angle of a drive shaft, in a vehicle having the electric motor and the differential gear. CONSTITUTION:Stators 3, 4 of winding electric coils 1a, 1b are mounted in cases 1, 2 of a driving gear 14 for rotatably supporting a hollow shaft 5 through bearings 10a, 10b, and rotors 6, 7 having cage-type conductors 6a, 7a are mounted in the hollow shaft 5. An electric motor 25 is constituted of these stators 3, 4, rotors 6, 7, etc. A gear type differential gear 8 is constituted by rotatably supporting output shafts 9a, 9b through a bearing 26 to the hollow shaft 5 injected with lubricating oil, to also fix a case 8a to a central part in the hollow shaft 5, rotatably supporting differentiating bevel gears 8c, 8d by a shaft 8b in this case 8a, and by meshing outputting bevel gears 8e, 8f mounted in the output shafts 9a, 9b respectively with the gears 8c, 8d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for an electric vehicle.

[0002]

2. Description of the Related Art FIG. 8 is a sectional view showing a conventional drive device for an electric vehicle. As shown in the figure, an electric motor 41 and a gear type differential device 42 having a reduction gear are arranged in the axial direction,
The output shafts 43a and 43b are connected to the differential device 42, and the electric motor 41, the differential device 42, and the output shafts 43a and 43b constitute an electric vehicle drive device 44.

FIG. 9 is a conceptual diagram of mounting on an electric vehicle having the electric vehicle drive device shown in FIG. As shown in the figure, the drive device 44 for an electric vehicle and the tire 15 are connected by a drive shaft 45.

[0004]

However, in such a drive device for an electric vehicle, since the drive shaft 45 is short because the axial dimension is large, the drive shaft 45 has a large operating angle, so that it can be mounted on a vehicle. Since the steering stability is poor and the case of the differential gear 42 is necessary, the weight is large.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a drive device for an electric vehicle, which has good vehicle mountability, steering stability, and weight.

[0006]

In order to achieve this object, according to the present invention, in a drive device for an electric vehicle having an electric motor and a differential device, the rotor of the electric motor is attached to a hollow shaft, and the hollow shaft is provided. The differential device is provided inside.

In this case, a speed reducer connected to the differential device is provided inside the hollow shaft.

A lubricating oil supply device for supplying lubricating oil is provided inside the hollow shaft.

[0009]

In this drive system for an electric vehicle, since the axial dimension is small, the drive shaft becomes long,
The operating angle of the drive shaft becomes smaller.

Further, when the speed reducer connected to the differential device is provided inside the hollow shaft, the output of the electric motor can be reduced.

Further, when the lubricating oil supply device for supplying the lubricating oil is provided inside the hollow shaft, the differential device and the speed reducer can be lubricated and the rotor can be cooled.

[0012]

1 is a sectional view showing a drive device for an electric vehicle according to the present invention. As shown in the figure, the stators 3 and 4 are attached to the cases 1 and 2, the electric coils 1a and 1b are wound around the stators 3 and 4, and the electric coils 1a and 1b are wound.
Is connected to the terminal portion 11 and the bearings 1 are attached to the cases 1 and 2.
The hollow shaft 5 is rotatably supported via 0a and 10b,
Rotors 6, 7 having cage conductors 6a, 7a on the hollow shaft 5
Attached, the stators 3, 4, the electric coils 1a, 1
An electric motor 25 is configured by b, the rotors 6, 7, and the like. In addition, the output shafts 9a, 9
b is rotatably supported, the case 8a is fixed to the hollow shaft 5, and the shaft 8b and the differential bevel gears 8c and 8d are provided in the case 8a.
Are provided, and the output bevel gears 8e, 8 are provided on the output shafts 9a, 9b.
f is attached, and the case 8a, the shaft 8b, the differential bevel gears 8c and 8d, and the output bevel gears 8e and 8f constitute a gear type differential device 8. The electric motor 25 and the differential device 8 are used for an electric vehicle. The drive device 14 is configured. Also,
A rotation speed detector 12 is attached to the hollow shaft 5, and sealing materials 13a and 13b are provided between the hollow shaft 5 and the output shafts 9a and 9b.
Is provided, and the seal material 1 is provided between the case 2 and the output shaft 9b.
3 c is provided, and lubricating oil is injected into the hollow shaft 5.

FIG. 2 is a conceptual diagram of mounting on an electric vehicle having the electric vehicle drive device shown in FIG. As shown in the figure, the drive device 16 for an electric vehicle and the tire 15 are connected by a drive shaft 16.

In this electric vehicle drive device, when electricity is supplied to the electric coils 1a and 1b through the terminal portion 11, an induction current is generated in the cage conductors 6a and 7a, the hollow shaft 5 rotates, and the hollow shaft 5 rotates. The rotation of the shaft 5 is transmitted to the output shafts 9a and 9b through the case 8a of the differential device 8, the shaft 8b, the differential bevel gears 8c and 8d, and the output bevel gears 8e and 8f, and the loads generated on the left and right wheels are transmitted. When there is a difference between the two, the differential bevel gears 8c and 8d and the output bevel gears 8e and 8f relatively rotate to be in a differential state.

In such a drive device for an electric vehicle, since the drive shaft 16 is long because the axial dimension is small, the operating angle of the drive shaft 16 is small, so that the vehicle mountability and the steering stability are good. Moreover, since the differential device 8 is provided inside the electric motor 25, the case of the differential device 8 is not necessary, and the weight is small.

FIG. 3 is a sectional view showing another drive system for an electric vehicle according to the present invention. As shown in the figure, the hollow shaft 5
The internal gear 17 is attached to the inner diameter portion of the internal gear 1 and the sun gear 19 is provided on the output shaft 9b.
7, a carrier 18 is provided between the sun gear 19, and the internal gear 17, the carrier 18, and the sun gear 19 constitute a planetary gear type differential device 20.
Is located inside the hollow shaft 5.

FIG. 4 is a sectional view showing another drive device for an electric vehicle according to the present invention. As shown in the figure, the hollow shaft 5
The internal gear 5a is provided on the inner diameter part of the case 2
Is provided with a sun gear 21, and a carrier 22 is provided between the internal gear 5 a and the sun gear 21.
2 is rotatably supported by the bearing 23, the carrier 22 is fixed to the case 8a, and the reduction gear 24 is constituted by the internal gear 5a, the sun gear 21, and the carrier 22. In addition, the sealing material 13d is provided between the case 2 and the hollow shaft 5.
Is provided.

In this electric vehicle drive device, the rotation of the hollow shaft 5 is reduced by the speed reducer 24, and the speed reducer 2
The rotation reduced by 4 is transmitted to the output shafts 9a and 9b via the differential device 8.

In such an electric vehicle drive device, the output of the electric motor 25 can be reduced,
The axial dimension of the electric motor 25 can be further reduced, and the weight can be reduced.

FIG. 5 is a sectional view showing another drive system for an electric vehicle according to the present invention. As shown in the figure, the hollow shaft 5
A speed reducer 24 and a differential device 20 are provided inside the device, and the speed reducer 24 and the differential device 20 are connected to each other.

FIG. 6 is a sectional view showing a part of another electric vehicle driving device according to the present invention, and FIG. 7 is a sectional view showing a part of the electric vehicle driving device shown in FIG. As shown in the figure, a seal material 13e is provided between the case 1 and the hollow shaft 5, and a seal material 13f is provided between the case 1 and the output shaft 9a.
Is provided, the output shafts 9a and 9b are provided with oil passages 9c and 9d, the case 1 is provided with a discharge port 37, the case 2 is provided with a supply port 34, and the oil delivery between the supply port 34 and the oil passage 9d is performed. A portion 35 is provided, an oil delivery portion 36 between the discharge port 37 and the oil passage 9c is provided, an oil tank 30 is connected to the discharge port 37 via an oil passage 38, and an air breather 30a is provided in the oil tank 30. A strainer 31 is connected to the oil tank 30, and an oil pump 32 is attached to the strainer 31.
Is connected to the oil pump 32, the supply port 34 is connected to the oil pump 32 via the oil passage 33, and the oil tank 30 and the strainer 3 are connected.
1, the lubricating oil supply device 39 is configured by the oil pump 32 and the like.

In this electric vehicle drive device, when the lubricating oil in the oil tank 30 is sent to the supply port 34 by the oil pump 32 through the strainer 31, the lubricating oil passes through the oil delivery section 35 and the oil passage 9d. And is supplied into the hollow shaft 5. In addition, the lubricating oil inside the hollow shaft 5 is the oil passage 9
The oil is collected in the oil tank 30 through the c, the oil delivery section 36, and the discharge port 37.

In such a drive device for an electric vehicle, the differential device 8 can be lubricated, and
Since the rotors 6 and 7 can be cooled, the life can be extended.

In the embodiment shown in FIGS. 6 and 7, the lubricating oil supply device 39 cools the differential gear 8; however, the lubricating oil supply device cools the differential gear 20 and the speed reducer 24. Good.

[0025]

As described above, in the drive system for an electric vehicle according to the present invention, the operating angle of the drive shaft is small, so that the vehicle mountability and the steering stability are good, and the case of the differential device is good. Since it is unnecessary, the weight is small.

Further, when the speed reducer connected to the differential device is provided inside the hollow shaft, the output of the electric motor can be reduced, so that the axial dimension of the electric motor can be further reduced and the weight can be reduced. Can be made smaller.

Further, when the lubricating oil supply device for supplying the lubricating oil is provided inside the hollow shaft, the differential device and the speed reducer can be lubricated and the rotor can be cooled. Can be lengthened.

[Brief description of drawings]

FIG. 1 is a sectional view showing a drive device for an electric vehicle according to the present invention.

FIG. 2 is a conceptual diagram of mounting on an electric vehicle having the electric vehicle drive device shown in FIG.

FIG. 3 is a cross-sectional view showing another electric vehicle drive device according to the present invention.

FIG. 4 is a cross-sectional view showing another drive device for an electric vehicle according to the present invention.

FIG. 5 is a cross-sectional view showing another drive device for an electric vehicle according to the present invention.

FIG. 6 is a sectional view showing a part of another drive device for an electric vehicle according to the present invention.

7 is a cross-sectional view showing a part of the drive device for the electric vehicle shown in FIG.

FIG. 8 is a cross-sectional view showing a conventional drive device for an electric vehicle.

9 is a conceptual diagram of mounting on an electric vehicle having the drive device for the electric vehicle shown in FIG.

[Explanation of symbols]

 5 ... Hollow shaft 6 ... Rotor 7 ... Rotor 8 ... Differential device 20 ... Differential device 24 ... Reducer 25 ... Electric motor 39 ... Lubricating oil supply device

Claims (3)

[Claims]
1. A drive device for an electric vehicle having an electric motor and a differential gear device, wherein a rotor of the electric motor is attached to a hollow shaft, and the differential device is provided inside the hollow shaft. Drive system for electric vehicles.
2. The drive device for an electric vehicle according to claim 1, wherein a reduction gear connected to the differential gear is provided inside the hollow shaft.
3. A lubricating oil supply device for supplying a lubricating oil to the inside of the hollow shaft.
The drive device for an electric vehicle according to.
JP30145193A 1993-12-01 1993-12-01 Driving gear for electric vehicle Pending JPH07156673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30145193A JPH07156673A (en) 1993-12-01 1993-12-01 Driving gear for electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30145193A JPH07156673A (en) 1993-12-01 1993-12-01 Driving gear for electric vehicle

Publications (1)

Publication Number Publication Date
JPH07156673A true JPH07156673A (en) 1995-06-20

Family

ID=17897053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30145193A Pending JPH07156673A (en) 1993-12-01 1993-12-01 Driving gear for electric vehicle

Country Status (1)

Country Link
JP (1) JPH07156673A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760549A1 (en) * 1995-09-04 1997-03-05 Toyota Jidosha Kabushiki Kaisha Drive assembly having electric motor and differential gear device disposed within rotor of the motor
FR2801144A1 (en) * 1999-11-12 2001-05-18 Linde Ag Drive device with electric motor applicable in particular to a carrier
EP1469232A2 (en) 2003-04-18 2004-10-20 Kabushiki Kaisha Toyota Jidoshokki Differential apparatus
JP2005278319A (en) * 2004-03-25 2005-10-06 Honda Motor Co Ltd Motor-type power device
WO2006051361A1 (en) * 2004-10-12 2006-05-18 Nissan Motor Co., Ltd. Vibration damping for a rotating shaft
CN100447444C (en) * 2004-10-12 2008-12-31 日产自动车株式会社 Vibration damping for a rotating shaft
JP2009502628A (en) * 2005-07-29 2009-01-29 ボーグワーナー・インコーポレーテッド Auxiliary electric drive assembly
WO2012052201A1 (en) * 2010-10-18 2012-04-26 Schaeffler Technologies AG & Co. KG Drive device
WO2012096310A1 (en) * 2011-01-11 2012-07-19 株式会社ジェイテクト Device for transmitting driving force of motors
CN108128230A (en) * 2017-12-30 2018-06-08 吴波挺 A kind of Novel industrial robot hydraulic car

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5759128A (en) * 1995-09-04 1998-06-02 Toyota Jidosha Kabushiki Kaisha Drive assembly having electric motor and differential gear device disposed within rotor of the motor
EP0760549A1 (en) * 1995-09-04 1997-03-05 Toyota Jidosha Kabushiki Kaisha Drive assembly having electric motor and differential gear device disposed within rotor of the motor
FR2801144A1 (en) * 1999-11-12 2001-05-18 Linde Ag Drive device with electric motor applicable in particular to a carrier
US7220207B2 (en) * 2003-04-18 2007-05-22 Kabushiki Kaisha Toyota Jidoshokki Differential apparatus
EP1469232A2 (en) 2003-04-18 2004-10-20 Kabushiki Kaisha Toyota Jidoshokki Differential apparatus
EP1469232A3 (en) * 2003-04-18 2010-04-07 Kabushiki Kaisha Toyota Jidoshokki Differential apparatus
JP4538253B2 (en) * 2004-03-25 2010-09-08 本田技研工業株式会社 Motor type power unit
JP2005278319A (en) * 2004-03-25 2005-10-06 Honda Motor Co Ltd Motor-type power device
WO2006051361A1 (en) * 2004-10-12 2006-05-18 Nissan Motor Co., Ltd. Vibration damping for a rotating shaft
CN100447444C (en) * 2004-10-12 2008-12-31 日产自动车株式会社 Vibration damping for a rotating shaft
US7692347B2 (en) 2004-10-12 2010-04-06 Nissan Motor Co., Ltd. Vibration damping for a rotating shaft
JP2009502628A (en) * 2005-07-29 2009-01-29 ボーグワーナー・インコーポレーテッド Auxiliary electric drive assembly
WO2012052201A1 (en) * 2010-10-18 2012-04-26 Schaeffler Technologies AG & Co. KG Drive device
WO2012096310A1 (en) * 2011-01-11 2012-07-19 株式会社ジェイテクト Device for transmitting driving force of motors
WO2012096308A1 (en) * 2011-01-11 2012-07-19 株式会社ジェイテクト Motor drive force transmission device
CN108128230A (en) * 2017-12-30 2018-06-08 吴波挺 A kind of Novel industrial robot hydraulic car
CN108128230B (en) * 2017-12-30 2018-11-09 深圳供电局有限公司 A kind of Novel industrial robot hydraulic car

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