HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME

摘要

PURPOSE: A hydraulic dynamic pressure assembly and a motor including the same is provided to increase a lifetime of a motor by preventing an oil leakage according to an external impact and temperature rising and maximize the lifetime of the motor by minimizing rubbing between a hub which is a rotary member and a sleeve which is a fixing member. CONSTITUTION: A hydraulic dynamic pressure assembly(100) comprises a hub(210), a sleeve(120), and a protrusion unit(250). The hub is joined to a shaft and rotated by being connected to the shaft. The sleeve supports the shaft. The upper part of the sleeve is concavely formed so that a storing groove(140) storing oil is formed between the hubs. The protrusion unit is projected to a side of the hub corresponding to the upper part of the sleeve. The protrusion unit makes the oil seclude between the sleeves. An oil interface is formed in the outer side of the radius direction of the protrusion unit.