PLAID GROOVE BEARING ROTATING IN TWO DIRECTIONS

PURPOSE: A plaid groove bearing rotating in two directions is provided to make smooth the rotation by forming an oil film when rotating in two directions and by forming a plaid groove on a rotor or a stator. CONSTITUTION: A spindle motor has a plaid groove(19) on one side of a shaft(8) or a sleeve(16). If a rotor rotates according to the driving power generated from an electromagnetic circuit consisting of a rotor magnet(6) and a coil(14), the oil between the shaft and the sleeve faces the central part of the plaid groove. Herein, the rotating driving power of the spindle motor is determined in its direction according to the direction of the current fed to the coil. When the rotor rotates in two directions(clockwise or counterclockwise), the oil gathers to the central part of the plaid groove without regard to the rotating direction of the rotor. Then the rotor rotates with rigidity in radius direction. Therefore, the rotor and the stator moves relatively on both sides of the oil film in any rotating directions when the rotor rotates in two directions. 본 발명은 양방향 회전에 적합하도록 한 격자무늬 그루브 베어링에 관한 것이다. 본 발명의 양방향 회전형 격자무늬 그루브 베어링은 샤프트와 슬리브 중 어느 일측에 격자무늬의 그루브가 형성된다. 본 발명에 의하면, 격자무늬의 그루브를 회전자부 또는 고정자부에 형성함으로써 양방향 회전시 유막을 형성하여 회전을 원할하게 함으로써 양방향 회전에 적합하게 된다.