Patent ID: 8443684

Claim:
A rotary drive device, having a device housing in which drive means are disposed which are in rotary driving connection with a power takeoff part supported rotatably relative to the device housing, the power takeoff part having a power takeoff disc which over at least a portion of its axial length is disposed in a bearing receptacle surrounded radially outward by the device housing, and the power takeoff disc being surrounded concentrically radially outward by at least one annular roller bearing unit which has a bearing assembly, the bearing assembly comprising the following: a plurality of rolling elements distributed over the circumference of the power takeoff disc; an annular inner running surface arrangement serving to radially brace the rolling elements relative to the power takeoff disc; and an annular outer running surface arrangement serving to radially brace the rolling elements with respect to the device housing, wherein the entire bearing assembly is received axially inside the bearing receptacle of the device housing, in such a manner that the entire outer running surface arrangement is surrounded and braced by a boundary wall portion of the device housing, the boundary wall portion delimiting the bearing receptacle radially outward wherein the inner running surface arrangement comprises a front inner bearing ring axially spaced-apart from a rear inner bearing ring, the rear inner bearing ring being associated with the bottom of the bearing receptacle and being braced directly on the power takeoff disc, and the front inner bearing ring being braced directly on an adjusting ring screwed coaxially on the power takeoff disc, and wherein the power takeoff part has a power takeoff shaft extending centrally from the power takeoff disc into the interior of the device housing, the power takeoff shaft being in rotary driving connection with the drive means.