| 摘要 |
A drive roller unit for driving articles on a conveyor track includes a drive roller which can be driven in rotation by an electric motor by way of a planetary transmission. The drive roller is mounted rotatably on a guide body which permits the roller to be movable relative to a base of the unit between a lower rest position and an upper drive position in which it is in engagement with the underside of the article to be driven. An internal gear ring which is fixedly connected to the drive roller is in the form of a crown wheel of the planetary transmission. A planet wheel of the planetary transmission meshes on the one hand with the internal gear ring and on the other hand with a sun wheel of the planetary transmission. The sun wheel is driven by the electric motor while the planet carrier of the planet wheel is fixedly connected to the guide body.
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