Patent DE-102011086588-A1 (DE)
Title: Linear drive comprises a housing, in which a first component is displaceably mounted via a gear in rotation about an axis or the first component is flexibly rotated in the housing in rotation about a longitudinal axis
IPC: B23K9/20
Filed: 2011-11-17
Abstract: The linear drive comprises a housing, in which a first component (1) is displaceably mounted via a gear in rotation about an axis or the first component is flexibly rotated in the housing in rotation about a longitudinal axis. A second component (2) rotatably connected with the first component is provided, and a fastening device for rotatable fixed connection with the first and second components is provided. The second component comprises a passage opening to the first component. The fastening device is positively arranged in the passage opening. The linear drive comprises a housing, in which a first component (1) is displaceably mounted via a gear in rotation about an axis or the first component is flexibly rotated in the housing in rotation about a longitudinal axis. A second component (2) rotatably connected with the first component is provided, and a fastening device for rotatable fixed connection with the first and second components is provided. The second component comprises a passage opening to the first component. The fastening device is: positively arranged in the passage opening; eccentrically connected with the first component by a pressure welding method, a resistance welding method, a resistance butt welding method and an arc pressure welding method with respect to the axis; and formed as a cuboid-shaped fastening device or as pin-shaped fastening device having polygonal or round cross-section. The fastening device comprises a defined contact point at which it is connected with the first component by the pressure welding method. The second component is made of plastic. The first component is formed as a thread spindle (1.1) or shaft and a hollow spindle with an external thread, and the second component is formed as a drive wheel (2.1) concentrically arranged on the thread spindle or the shaft. The fastening device is connected with a thread flank and a thread pitch of the first component formed as a thread spindle. The first component is tubular, and the second component is formed as a nut with an internal thread, where the inner diameter of the nut is smaller than the inner diameter of the tubular first component. The first component in an end portion is provided with the internal thread, in which the second component is screwed on the front side with an external thread. The first component comprises a vertical front surface. The fastening device is connected with the front surface of the first component. The second component is partially covered with a radial area of the front surface, and the passage opening is arranged in the radial area. The passage opening is formed as a rectangular passage opening. A cuboid fastening device is arranged in the passage opening, and is welded on the contact point with the first component. The fastening device is welded at the front surface pointing to the first component at two contact points with the first component, where the contact points are eccentrically arranged and lying opposite to each other in an installation position with respect to the axis. Two mutually spaced pin-shaped fastening devices are connected with the front surface facing towards the second component of the first component. The second component partially extends with an axial area with respect to the axis in an axial direction radially outside of the first component, and the passage opening is arranged in an axial region (11). The axial region comprises a first cylinder surface for arranging a cylindrical bearing such as ball bearing at a radial side lying outside, in which the passage opening is discharged. The passage opening radially discharges outside in an indentation or emancipation in the first cylindrical surface.