| 摘要 |
The door pivoting assembly consists of at least three ball bearings, at each end of a vertical pivot tube at one side of a door, circumferentially arranged about the pivot centre and with fixed inner races and outer races running around the inner surface of the ends of the pivot tube. The pivot tube (10), to which a door leaf is attached, has a bearing arrangement (14,15) at each end mounted upon an upper (2) and a lower (3) fixed part. Small ball bearings (19,21) are arranged with their centres fixed (20) on a circumference such that the outer races contact the inside surface of the tube. |
