IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0663858
(2005-09-27)
|
등록번호 |
US-8360928
(2013-01-29)
|
우선권정보 |
JP-2004-280653 (2004-09-27); JP-2004-280654 (2004-09-27) |
국제출원번호 |
PCT/JP2005/018251
(2005-09-27)
|
§371/§102 date |
20080321
(20080321)
|
국제공개번호 |
WO2006/035981
(2006-04-06)
|
발명자
/ 주소 |
- Tabata, Atsushi
- Taga, Yutaka
- Miyazaki, Terufumi
|
출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
17 |
초록
▼
A drive apparatus for a vehicle includes a differential action limiting device for selectively switching a differential device in a differential state and a locked state, with the differential device and the differential action limiting device being disposed between a first electric motor and a seco
A drive apparatus for a vehicle includes a differential action limiting device for selectively switching a differential device in a differential state and a locked state, with the differential device and the differential action limiting device being disposed between a first electric motor and a second electric motor.
대표청구항
▼
1. A drive apparatus for a vehicle having a differential device through which an output of a drive power source is distributed to a first electric motor and a transmitting member, and a second electric motor disposed between the transmitting member and drive wheels, comprising: a differential action
1. A drive apparatus for a vehicle having a differential device through which an output of a drive power source is distributed to a first electric motor and a transmitting member, and a second electric motor disposed between the transmitting member and drive wheels, comprising: a differential action limiting device for selectively switching the differential device in a differential state and a locked state;the differential device and the differential action limiting device being disposed between the first electric motor and the second electric motor;a case accommodating the first electric motor, the differential device and the second electric motor therein; anda partition wall protruding inwardly from the case to partition an inside of the case into a plurality of compartments and having a convex portion of thick-wall shape formed at an outer circumferential periphery end portion thereof, the convex portion protruding inward toward an inside of the case,wherein the differential action limiting device includes a brake including a plurality of friction plates and a piston for forcing the plurality of friction plates to be coupled to each other, for coupling rotating elements forming the differential device to a non-rotating member; andupon movement of the piston toward the convex portion of the partition wall, the piston and the convex portion of the partition wall pressurize the plurality of friction plates into a coupled condition. 2. The drive apparatus for vehicle according to claim 1, further comprising a supporting member for rotatably supporting a rotor of the first electric motor; the differential device including three rotating elements including a first rotary element coupled to the drive power source, a second rotary element coupled to the first electric motor, and a third rotary element coupled to the transmitting member;the differential action limiting device including a clutch through which among the three rotating elements, two rotating elements are coupled to each other; andthe clutch being placed on one side of the supporting member in opposition to the first electric motor. 3. The drive apparatus for vehicle according to claim 2, wherein the supporting member is provided with an oil passage for supplying oil to a hydraulic-type frictionally coupling device constituting the differential action limiting device. 4. The drive apparatus for vehicle according to claim 1, wherein the differential device includes three rotating elements having a first rotary element coupled to the drive power source, a second rotary element coupled to the first electric motor, and a third rotary element coupled to the transmitting member, the second rotary element is coupled to a non-rotating member through the brake; andthe brake being placed in a radially outward area of the differential device. 5. The drive apparatus for vehicle according to claim 1, wherein the differential device includes three rotating elements including a first rotary element coupled to the drive power source, a second rotary element coupled to the first electric motor, and a third rotary element coupled to the transmitting member; the differential action limiting device including a clutch through which, of the three rotating elements, two rotating elements are coupled to each other, and the brake through which the second rotary element is coupled to a non-rotating member; andboth the clutch and the brake including hydraulic-type frictionally coupling devices. 6. The drive apparatus for vehicle according to claim 5, further comprising a gear device including a hydraulic-type frictionally coupling device disposed between the second electric motor and the drive wheels. 7. The drive apparatus for vehicle according to claim 1, wherein the brake is disposed in a radially outward area of the differential device. 8. The drive apparatus for vehicle according to claim 1, wherein the partition wall serves to rotatably support the first electric motor. 9. The drive apparatus for vehicle according to claim 1, wherein the brake includes a hub member supporting parts of the plurality of friction plates to be non-rotatable relative to each other, for coupling the rotating elements forming the differential device to the non-rotating member; the differential action limiting device includes a clutch including a plurality of friction plates engageable with each other, a piston forcing the plurality of friction plates, and a cylinder member for accommodating the piston and operative to allow at least two rotating elements including a rotating element coupled to the non-rotating member with the brake, of rotating elements forming the differential device to be coupled to each other; and the cylinder member of the clutch and the hub member of the brake being unitized to each other by bonding. 10. The drive apparatus for vehicle according to claim 9, wherein the partition wall includes hydraulic passages through which actuating oil is supplied to the piston of the clutch. 11. The drive apparatus for vehicle according to claim 9, wherein the brake is disposed in a radially outward area of the differential device. 12. The drive apparatus for vehicle according to claim 9, wherein the plurality of friction plates include a plurality of outwardly oriented friction plates spline-coupled to an outer circumferential periphery of a radially outward tubular section of the hub member. 13. The drive apparatus for vehicle according to, claim 1, wherein the second electric motor is operatively coupled to a power transmitting path between the transmitting member and the drive wheels; the differential device and the brake forming a continuously-variable shifting portion that functions as an electrically continuously variable transmission; and upon release of the brake the continuously-variable shifting portion being placed in a differential state to be operative as the electrically continuously variable transmission, and upon engagement of the brake a differential action of the continuously-variable shifting portion being locked. 14. The drive apparatus for vehicle according to claim 1, wherein the differential action limiting device is provided on the differential device and functions as a differential state switching device for switching the differential device to the differential state operative as a transmission to electrically change a shifting ratio due to a differential operation thereof, or to a non-differential state to mechanically transmit power due to the locked state of the differential device. 15. The drive apparatus for vehicle according to claim 1, wherein the plurality of friction plates include a plurality of inwardly oriented friction plates and a plurality of outwardly oriented friction plates. 16. The drive apparatus for vehicle according to claim 15, wherein a tubular spacer member is interposed between an innermost friction plate of the plurality of inwardly oriented friction plates and the convex portion. 17. The drive apparatus for vehicle according to claim 16, wherein the plurality of inwardly oriented friction plates are spline-coupled to spline teeth extending from the case. 18. The drive apparatus for vehicle according to claim 15, wherein the piston is configured to directly contact an outermost friction plate of the plurality of inwardly oriented friction plates when the piston forces the plurality of friction plates to be coupled to each other.
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