top contact surface

Due to the above mentioned defects, early fatigue peeling occurs under the condition of overly contact stress at the top of the tooth caused by abnormal contact at the tooth surface.

因此，在齿面非正常接触导致齿顶接触应力过大的情况下，该齿轮发生了早期疲劳剥落。

When the top sleeve is reversing-rotated, the contact piece leaves the inclining surface, the upright rod is bounced back upwards, and the motor circuit is cut off.

反向转动顶套时，触片离开斜面，竖杆向上弹回，马达电路被断开。