Abstract: A first electric motor cooling flow passage (120A) and a first electric motor lubrication flow passage (121A) supply oil from an electric oil pump (70) through the outer side of one end (E1) of the first electric motor (2A) to the portions (A1, A2) of the first electric motor (2A) which are to be cooled/lubricated. A second electric motor cooling flow passage (120B) and a second electric motor lubrication flow passage (121B) supply oil from the electric oil pump (70) through the outer side of the other end (E2) of the second electric motor (2B) to the portions (B1, B2) of the second electric motor (2B) which are to be cooled/lubricated.

Abstract: A drive device 1A includes: electric motors 2A and 2B that outputs drive powers; and planetary gear reducers 12A and 12B disposed between axles 10A and 10B connected to cylindrical shafts 16A and 16B serving as the output shafts of the electric motors 2A and 2B and to rear wheels LWr and RWr. The drive device 1A further includes: a one-way power transmission device that transmits the one-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B; and a two-way power transmission device that transmits the two-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B. The one-way power transmission device and the two-way power transmission device are disposed on transmission passages from the electric motors 2A and 2B to the axles 10A and 10B.

Abstract: A drive device 1A includes: electric motors 2A and 2B that outputs drive powers; and planetary gear reducers 12A and 12B disposed between axles 10A and 10B connected to cylindrical shafts 16A and 16B serving as the output shafts of the electric motors 2A and 2B and to rear wheels LWr and RWr. The drive device 1A further includes: a one-way power transmission device that transmits the one-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B; and a two-way power transmission device that transmits the two-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B. The one-way power transmission device and the two-way power transmission device are disposed on transmission passages from the electric motors 2A and 2B to the axles 10A and 10B.

Abstract: A drive device 1A includes: electric motors 2A and 2B that outputs drive powers; and planetary gear reducers 12A and 12B disposed between axles 10A and 10B connected to cylindrical shafts 16A and 16B serving as the output shafts of the electric motors 2A and 2B and to rear wheels LWr and RWr. The drive device 1A further includes: a one-way power transmission device that transmits the one-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B; and a two-way power transmission device that transmits the two-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B. The one-way power transmission device and the two-way power transmission device are disposed on transmission passages from the electric motors 2A and 2B to the axles 10A and 10B.

Abstract: A fluid flow path control unit includes a fluid supply unit supplying fluid to a hydraulic connection/disconnection unit and a fluid supplied portion, and a flow path selector valve disposed on a fluid flow path between the fluid supply unit and the fluid supplied portion or stradding between a hydraulic path communicating between the fluid supply unit and the hydraulic connection/disconnection unit and the fluid flow path. The selector valve includes a valve element switchable between a first operating position and a second operating position, a restoration member biasing the valve element from the second position toward the first position and a fluid chamber accomodating fluid biasing the valve element from the first position toward the second position. The fluid flow path has a flow path resistance differing between when the valve element is in the first position and when the valve element is in the second position.

Abstract: A rear-wheel drive system includes motors for generating driving force to drive a vehicle, hydraulic brakes on power transmission lines between the motors and rear wheels switching a motors side and a wheels side to a connected state or a disconnected state, an ECU controlling the motors and the brakes and a one-way clutch in parallel with the hydraulic brakes on the transmission line configured to be engaged when a forward rotational power on the motors side is inputted into the wheels side and disengaged when a backward rotational power on the motors side is inputted into the wheels side and vice versa. The ECU causes the hydraulic brakes to be applied so as to put the motors side and the wheels side in the connected state when the forward rotational power on the motors side is inputted into the wheels side.

Abstract: A drive device 1A includes: electric motors 2A and 2B that outputs drive powers; and planetary gear reducers 12A and 12B disposed between axles 10A and 10B connected to cylindrical shafts 16A and 16B serving as the output shafts of the electric motors 2A and 2B and to rear wheels LWr and RWr. The drive device 1A further includes: a one-way power transmission device that transmits the one-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B; and a two-way power transmission device that transmits the two-way rotation power of the electric motors 2A and 2B to the axles 10A and 10B. The one-way power transmission device and the two-way power transmission device are disposed on transmission passages from the electric motors 2A and 2B to the axles 10A and 10B.

Abstract: An electromagnetic clutch 1 is disclosed having a magnetic flux loop 31 formed, in magnetic flux loop forming members 5, 7, 9, 11, 13 involving an electromagnet 5 and an armature 13, by the electromagnet 5 to allow the armature 13 to be operatively shifted to couple and uncouple a clutch 11, and a proximate member, close proximate to the members 5, 7, 9, 11, 13, includes magnetic flux leakage minimizing sections 15, 17, 19, 21, 23, 25 that minimize magnetic fluxes leaked from the armature 13 to the proximate member.

Abstract: An installation structure of an electromagnetic multiple-disk clutch device having an electromagnet and a multiple-disk clutch pack having drive and driven plates and arranged radially outside of the electromagnet, includes a stationary housing portion accommodating therein the electromagnetic multiple-disk clutch device. An engaging member is attached to an electromagnet-coil casing of the electromagnet, and extends radially outwards from the electromagnet-coil casing. A radial length of the engaging member is dimensioned so that the outermost end of the engaging member is laid outside of the outermost portion of the multiple-disk clutch pack. Also provided is an engaging-member retainer formed in the stationary housing portion and brought into engagement with the engaging member when assembling the electromagnetic multiple-disk clutch device, for preventing rotary motion of the electromagnet and for positioning the electromagnet with respect to the stationary housing portion.

Abstract: An electromagnetic clutch 1 is disclosed having a magnetic flux loop 31 formed, in magnetic flux loop forming members 5, 7, 9, 11, 13 involving an electromagnet 5 and an armature 13, by the electromagnet 5 to allow the armature 13 to be operatively shifted to couple and uncouple a clutch 11, and a proximate member, close proximate to the members 5, 7, 9, 11, 13, includes magnetic flux leakage minimizing sections 15, 17, 19, 21, 23, 25 that minimize magnetic fluxes leaked from the armature 13 to the proximate member.