Patent ID: 7887450

Claim:
A differential device comprising: a differential case rotatable about an axis and axially immovable; a differential gear set housed in the differential case, the differential gear set being capable of having links with axles so as to differentially transmit a driving force acting on the differential case to the axles; a clutch configured to either limit differential motion of the differential gear set or control transmission of the driving force from the differential case to the differential gear set, the clutch being housed in and rotatable with the different case; a plunger configured to disengageably engage the clutch; a solenoid configured to generate a magnetic flux for driving the plunger; a magnetic core slidably placed in contact with a portion of the differential case and incompletely enclosing the solenoid to expose the solenoid to the portion, the magnetic core in combination with the portion and the plunger being so dimensioned as to surround the solenoid; and a support member configured to support the magnetic core to fit with the differential case in an axial direction along the axis, wherein the clutch comprises a cam face configured to convert torque of the differential case into axial force on the clutch to assist engagement of the clutch, the cam face being so formed on a side face of the clutch as to butt against a side face of an opening of the differential case to generate the axial force.