HUB LOCKING DEVICE OF A FOUR-WHEEL DRIVE VEHICLE FOR MANUALLY SWITCHING FOUR-WHEEL DRIVE BY OPERATING A DIAL MEMBER MOVING IN THE AXIAL DIRECTION OF A DRIVE SHAFT

摘要

PURPOSE: A hub locking device of a four-wheel drive vehicle is provided to switch manually four-wheel drive when a hub lock system for changing automatically two-wheel drive into four-wheel drive by vacuum is operated wrong. CONSTITUTION: A hub locking device of a four-wheel drive vehicle is composed of a four-wheel drive shaft(11) installed in a wheel-end housing(10); an inner drive gear(12) engaged with the drive shaft; a clutch ring(13) mounted to the drive shaft to move axially; a piston(15) for coupling the clutch ring to the inner drive gear; a dial member(20) disposed at the end of the wheel-end housing to move in the axial direction of the drive shaft; and a cam(21) arranged inside the dial member to push the piston. A screw unit(22) fitted in a screw unit(10a) formed in the end of the wheel-end housing is formed on the outer peripheral surface of the dial member. A grip groove(23) for rotating the dial member is formed in the front center of the dial member.