| 摘要 |
The drive, e.g. for a double door, consists of two shafts (11, 12) with cylindrical sections (13, 14) which are located coaxially and able to rotate about an axle (30), and a number of bearings (17). Some of the bearings are engaged with tracks on the cylindrical sections, maintaining fixed angular positions. At least one bearing is in the form of a needle bearing cage (15) with needle rollers (17), the cage made so that it can be fixed relative to a frame. The bearing tracks on the cylindrical elements have antislip coatings.
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