Ball checking mould for bearing assembly line

The utility model discloses a ball checking mould for a bearing assembly line. The ball checking mould comprises a bottom die for mounting a mould onto a rack, wherein the upper part of the bottom die is provided with a sliding end for horizontally sliding in a slide way of a bearing conveying line; the upper part of the sliding end is provided with an annular die core; round step blind holes are vertically arranged in the bottom die and the sliding end; seven ball holes for receiving bearing balls are annularly and uniformly arranged on the die core; the bottom parts of the ball holes are provided with air suction holes; and the air suction holes are communicated with the round step blind holes. When bearings are arranged on the die core, the bearing balls are located in the ball holes, the inner parts of the bearings are vacuumized through the air suction holes by a vacuum generator arranged on the rack in combination with pressing dies arranged at the upper parts of the bearings, and a pressure value when