Oil deflector

An oil deflector comprising:

• a ring support (130) disposed to surround an outer periphery of a shaft (110) and having a front surface support portion (131) formed on an air side of a front portion thereof and a rear surface support portion (133) formed on a bearing side of a rear portion thereof in such a manner as to be spaced apart from the front surface support portion (131) by a given distance;
• and
• a plurality of teeth (150) mounted along an inner periphery of the front surface support portion (131) and of the rear surface support portion (133) of the ring support (130), respectively, each tooth (150) having an end portion contacting with an outer periphery of the shaft (110) so as to prevent oil from leaking to the air side from the bearing side,
• movable teeth (160), wherein each movable tooth is mounted on a front outermost side of the teeth (150) disposed along the inner periphery of the front surface support portion (131) or on a rear outermost side of the teeth (150) disposed along the inner periphery of the rear surface support portion (133), respectively, and
• wherein pressurized gas behind the movable tooth (160) mounted on the front surface support portion (131) is injected to the outer peripheral surface of the shaft (110) through an injection passage (171) formed on the front surface support portion (131) so as to introduce the pressurized gas from an outside to form an air curtain behind the movable tooth (160) mounted on the front surface support portion, the air curtain being adapted to prevent foreign materials from being introduced from the outside and to prevent oil from spraying to the outside thereof from the inside thereof, each movable tooth (160) being made of an engineering plastic or an aluminum alloy and having the shape of a ring concentric with the front surface support portion (131) or the rear surface support portion (133), while being segmented into a plurality of parts groove-coupled to the inner peripheral surfaces of the front surface support portion (131) or the rear surface support portion (133), each movable tooth (160) having an elastic member (161) insertedly mounted on the inner surface of the groove-coupled portion thereof in such a manner as to bias the movable tooth (160) toward the center of the shaft (110), the elastic member (161) being provided in the form of a corrugated plate spring and having a stopper protrusion (161a) formed on one end portion thereof, the stopper protrusion (161a) being locked to a groove portion formed on the outer surface of the movable tooth (160) to prevent rotation of the elastic member (161).