| 摘要 |
The invention relates to a spindle drive for motor-powered adjustment of an adjustment element (1) of a motor vehicle, having a drive motor (2) with motor shaft (3), having a rotational speed reduction gearing (4) positioned downstream of the drive motor (2) and having a feed mechanism (5) positioned downstream of the rotational speed reduction gearing (4), wherein the rotational speed reduction gearing (4) has a planetary gear set (4a), and wherein the feed mechanism (5) is in the form of a spindle-spindle nut mechanism, wherein the planetary gear set (4a) has a rotatable sun gear (6) and, coaxial with respect thereto, a rotatable planet gear carrier (7) and a fixed or fixable internal gear (10), and wherein the planet gear carrier (7) bears at least one rotatable planet gear (8, 9) which is in axially parallel engagement with the sun gear (6) at one side and with the internal gear (10) at the other side, wherein the drive motor (2), the rotational speed reduction gearing (4a) and the feed mechanism (5) are accommodated one behind the other in a substantially elongate drive housing (13) and are oriented along a common drive longitudinal axis (14). It is proposed that the engagement between the sun gear (6) and the at least one planet gear (8, 9) of the planet gear carrier (7) is in the form of an evoloid toothing. |
