Bearing of top load

The utility model discloses a bearing of top load, bearing outer ring and bearing inner ring including coaxial setting, be provided with a plurality of ball between bearing outer ring and the bearing inner ring, bearing inner ring is provided with the ball groove, the ball sets up at the ball inslot, at least, two mutual contact positions that correspond have between ball and the ball groove, it keeps the holder of ball position to set up on the ball, the ball is interior hollow structure, the draw -in groove is seted up to bearing outer ring's interior disc, be provided with the shield on the bearing, the outer tip joint of shield is in the draw -in groove, the internal surface of shield is towards the ball, the utility model discloses a ball adopts the hollow structure design, light in weight, and the thermal capacitance is little, and the ball is placed at the ball inslot simultaneously, and the ball groove is by the both ends arc surface and be located two sections sunk areas between the arc surface and c