Patent ID: 6892845

Claim:
A two-wheel drive/four-wheel drive switching system for a vehicle, comprising: a switching unit installed in a casing provided on one of two final reduction gear units provided between an engine and a front wheel and between the engine and a rear wheel, said switching unit being capable of connecting or disconnecting a transmission of power between the one of the two final reduction gear units and the engine, wherein said switching unit includes: a driving shaft connected to a drive side of said switching unit; a driven shaft fitted to the driving shaft via a circular clearance; an electromagnetic clutch inserted in the circular clearance between the driving shaft and the driven shaft for connecting or disconnecting the driving shaft and the driven shaft; an electromagnetic coil for operating the electromagnetic clutch; accessories connected to the electromagnetic coil; and a speed sensor inserted into the casing for detecting a number of revolutions of the driving shaft, a stay mounted on the casing, the accessories and the speed sensor being attached to the stay.