초록 ▼

An actuator for a four wheel drive transfer mechanism which is laid in a power transmission device and is controlled by an electrical signal sent from a controlling unit comprises a torque generating mechanism which converts electrical energy into a torque, and a torque-thrust conversion mechanism w

An actuator for a four wheel drive transfer mechanism which is laid in a power transmission device and is controlled by an electrical signal sent from a controlling unit comprises a torque generating mechanism which converts electrical energy into a torque, and a torque-thrust conversion mechanism which converts the torque generated by the torque generating mechanism into a thrust force. The thrust force generated from the torque-thrust conversion mechanism is applied to the frictional engaging device to control torque distribution between front and rear vehicle wheels.

대표청구항 ▼

An actuator for a transfer mechanism for a four wheel drive vehicle, said transfer mechanism transferring torque from a transmission to at least one of a front wheel side output member and a rear wheel side output member, said actuator comprising: a friction clutch connected to the front wheel side

An actuator for a transfer mechanism for a four wheel drive vehicle, said transfer mechanism transferring torque from a transmission to at least one of a front wheel side output member and a rear wheel side output member, said actuator comprising: a friction clutch connected to the front wheel side output member and the rear wheel side output member, said friction clutch controlling torque distribution to the front and rear wheel side output members, a non-rotating casing for receiving the friction clutch therein, an electric motor situated outside the casing, a reduction mechanism connected to the electric motor, said reduction mechanism reversibly reducing rotational number of the motor, a torque-thrust conversion mechanism situated inside the casing and connected to the reduction mechanism, said torque-thrust conversion mechanism reversibly converting rotation force transmitted from the reduction mechanism to linear movement, a pressing member for pressing the friction clutch, and a thrust bearing situated between the pressing member and the torque-thrust conversion mechanism so that when the electric motor is actuated, the friction clutch is moved smoothly and accurately to control distribution of torque between the front and rear wheel side output members, the front and rear wheel side output members being drivingly connected to front and rear wheels, respectively, of the four wheel drive vehicle.