| abstract |
The invention relates to a device (1) for the rotary drive of part of a machine or piece of equipment, for example a crane, an elevating working platform, a tracking photovoltaic assembly or heliostat or the like equipment for tracking mirrors within the context of a solar thermal power station, etc., on a foundation or on a chassis, for example of a heavy goods vehicle, or another part of a machine or piece of equipment, comprising a worm gear mechanism having a housing (2) which has a connecting surface for connecting to a part of the machine or piece of equipment, to a chassis or to a foundation, having a worm which can be caused to rotate manually or by means of a drive motor, and having a worm gear (4) which is rotatably mounted in the housing, in that, on both sides of the toothing of the worm gear provided to engage with the worm (3), at least one rolling contact bearing is provided in each case, and which has a connecting surface for connecting to a part of a machine or piece of equipment, to a chassis or to a foundation; according to the invention, the housing (2) and the worm gear (4) are each formed in one piece, wherein the smallest internal diameter of the housing (2) is larger than the largest external diameter of the worm gear (4). |