JP2006089001A5 - - Google Patents

Claims (14)

A vehicle drive device comprising: a differential device that distributes the output of a drive force source to a first motor and a transmission member; and a second motor provided between the transmission member and drive wheels,
A differential limiting device for selectively switching the differential device between a differential state and a locked state, wherein the differential device and the differential limiting device are between the first electric motor and the second electric motor; It is arrange | positioned by the vehicle drive device characterized by the above-mentioned. The vehicle drive device according to claim 1,
A support member for rotatably supporting the rotor of the first electric motor;
The differential device includes three rotating elements, a first rotating element connected to the driving force source, a second rotating element connected to the first electric motor, and a third rotating element connected to the transmission member. Have
The differential limiting device is a clutch that connects any two of the three rotating elements;
The vehicle drive device, wherein the clutch is disposed on the opposite side of the first electric motor with respect to the support member. The vehicle drive device according to claim 1,
The differential device includes three rotating elements, a first rotating element connected to the driving force source, a second rotating element connected to the first electric motor, and a third rotating element connected to the transmission member. Have
The differential limiting device is a brake that connects the second rotating element to a non-rotating member;
The vehicular drive device, wherein the brake is disposed on an outer diameter side of the differential device. The vehicle drive device according to claim 1,
The differential device includes three rotating elements, a first rotating element connected to the driving force source, a second rotating element connected to the first electric motor, and a third rotating element connected to the transmission member. Have
The differential limiting device includes a clutch that connects any two rotating elements of the three rotating elements, and a brake that connects the second rotating element to a non-rotating member,
A vehicle drive device characterized in that both the clutch and the brake are hydraulic friction engagement devices.   The vehicle drive device according to claim 4, wherein a gear device having a hydraulic friction engagement device is provided between the second electric motor and the drive wheel. The vehicle drive device according to claim 1 or 2,
A case and a separation wall provided in the case and separating the inside of the case into a plurality of spaces;
The differential limiting device includes a plurality of friction plates and a piston that presses the plurality of friction plates and engages the plurality of friction plates with each other, and does not rotate a rotating element that constitutes the differential device A brake connected to the member,
The plurality of friction plates are clamped by the piston and the separation wall as the piston moves toward the separation wall, and the plurality of friction plates are engaged with each other. apparatus. The vehicle drive device according to claim 6, wherein the brake is disposed on a radially outer side of the differential device. 8. The vehicle drive device according to claim 6, wherein the separation wall rotatably supports the electric motor. The vehicle drive device according to claim 1 or 2,
The differential limiting device is:
A brake having a plurality of friction plates engaged with each other, and a hub member that supports a part of the plurality of friction plates in a relatively non-rotatable manner, and that connects a rotating element constituting the differential to a non-rotating member; ,
The non-rotating member includes a plurality of friction plates engaged with each other, a piston that presses the plurality of friction plates, and a cylinder member that accommodates the pistons. A clutch for interconnecting at least two rotating elements including rotating elements coupled to each other,
A vehicular drive device, wherein a cylinder member of the clutch and a hub member of the brake are integrated by joining. 10. The vehicle drive device according to claim 9, wherein the separation wall includes an oil passage that supplies hydraulic oil to the piston of the clutch. 11. The vehicle drive device according to claim 9, wherein the brake is disposed on a radially outer side of the differential device. A vehicle drive device according to any one of claims 6 to 11,
The second electric motor is operatively connected to a power transmission path between the transmission member and the drive wheel,
The differential device and the brake constitute a continuously variable transmission that functions as an electrical continuously variable transmission,
When the brake is released, the continuously variable transmission section becomes differential and can operate as an electric continuously variable transmission. When the brake is engaged, the difference between the continuously variable transmission section A vehicle drive device characterized in that the operation is locked. The vehicle drive device according to claim 1,
The differential limiting device is provided in the differential mechanism and functions as a transmission in which a gear ratio is electrically changed by the differential action of the differential mechanism working, and the differential action A vehicle drive device that functions as a differential state switching device for selectively switching between a non-differential state in which power is mechanically transmitted due to a locked state in which the power does not work. The vehicle drive device according to claim 2,
The vehicle drive device, wherein the support member includes an oil passage that supplies hydraulic pressure to a hydraulic friction engagement device that constitutes the differential limiting mechanism.