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An electromotive linear drive, in particular for adjusting parts of an item of furniture, having a multi-part housing which is produced from plastic in an injection-molding process and in which are mounted at least one drive train and a block-shaped spindle nut which engages at least partially aroun

An electromotive linear drive, in particular for adjusting parts of an item of furniture, having a multi-part housing which is produced from plastic in an injection-molding process and in which are mounted at least one drive train and a block-shaped spindle nut which engages at least partially around the housing and/or at least partially into the housing. The housing is formed from at least two housing parts and has sliding tracks for the spindle nut, wherein at least the thread flights of the spindle are arranged outside the housing. In one preferred embodiment, the housing is arranged below the region of the spindle in relation to the assembled position of the electromotive linear drive. The housing parts forming the housing are of identical or similar, preferably shell-shaped, design in cross section.

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1. An electromotive linear drive, comprising: at least one rotatably driven spindle arranged outside a multi-part injection-molded plastic housing and having threads,a drive motor,a gear housing with a rotation speed reduction gear having a driven member formed as a rotational body that is formfitti

1. An electromotive linear drive, comprising: at least one rotatably driven spindle arranged outside a multi-part injection-molded plastic housing and having threads,a drive motor,a gear housing with a rotation speed reduction gear having a driven member formed as a rotational body that is formfittingly connected with the spindle,the plastic housing made of at least two formed housing parts constructed for insertion of the gear housing and defining a separation plane, wherein in relation to an installation position of the electromotive linear drive, the plastic housing extends over a region below the spindle, and wherein the separation plane of the plastic housing extends along a center longitudinal axis of the spindle, anda block-shaped and rotation-locked spindle nut disposed on the spindle and at least partially encompassing the plastid housing or at least partially engaging in the plastic housing, the plastic housing further including integrally formed sliding tracks for the spindle nut,wherein the spindle nut is formfittingly connected with the housing parts so as to be guided or supported for displacement relative to the plastic housing, and wherein at least the threads of the spindle are located outside the plastic housing. 2. The electromotive linear drive of claim 1, wherein the sliding tracks extend at least over a travel range of the spindle nut and the housing parts include free ends, wherein the free ends of the housing parts facing away from the drive motor include protrusions which include a bearing seat embodied as a slide bearing bushing fixedly mounted in a bore of the housing parts and supporting a free end of the threaded spindle. 3. The electromotive linear drive of claim 1, wherein the spindle nut is formed as a hollow body and includes a sleeve with interior threads arranged centrally between longitudinal edges, with the interior threads of the sleeve engaging with the threads of the spindle, and individual cavities of the hollow body are formed by stiffening ribs arranged in a lattice pattern and extending in a longitudinal and transverse direction of the spindle nut. 4. The electromotive linear drive of claim 3, wherein the formfitting connection between the spindle nut and in the housing parts is formed by parallel and spaced-apart guiding grooves and corresponding mating guiding ribs. 5. The electromotive linear drive of claim 1, wherein at least one housing part comprises a guiding groove or a guiding rib, and the spindle nut has corresponding guiding ribs or guiding grooves. 6. The electromotive linear drive of claim 5, wherein the guiding grooves or the guiding ribs of the housing and the corresponding guiding ribs or guiding grooves of the spindle nut mesh with the one another in such a way that the housing encompasses at least partially the spindle nut or at least partially engages in the spindle nut. 7. The electromotive linear drive of claim 1, further comprising connecting plates applied on longitudinal sides of the spindle nut and forming an input member of an adjustment fitting. 8. The electromotive linear drive of claim 1, further comprising a cover strip covering the spindle on a side facing away from the plastic housing, with the cover strip protruding over both sides of the spindle. 9. The electromotive linear drive of claim 1, wherein the rotational body comprises a worm wheel. 10. The electromotive linear drive of claim 1, further comprising limit switches or limit stops having a fixed location and delimiting end positions of the spindle. 11. The electromotive linear drive of claim 10, wherein the limit switches include a pusher and are secured in a holder having a wall, wherein at least one slot or a row of holes are disposed on a side of the wall facing away from the pusher. 12. The electromotive linear drive according of claim 1, wherein the plastic housing or the housing parts comprise molded pockets for receiving mounting hardware selected from nuts, threaded inserts, and screws. 13. The electromotive linear drive of claim 1, wherein the plastic housing is constructed to have an adjustable size, wherein an exterior or interior side, or both, of the plastic housing are formed as a tooth system configured to engage with a connecting element allowing an additional housing part to be connected, said additional housing part having an end cap which includes a bearing for a free end of the spindle, wherein the end cap engages at least in sections with the tooth system of the housing. 14. The electromotive linear drive of claim 13, wherein the end cap is formed from several parts. 15. The electromotive linear drive of claim 1, wherein at least one the housing parts has at least one section with a bezel shaped frame having openings or projections in which a limit switch is formfittingly inserted, with the openings or projections matching outer sections of the limit switch. 16. The electromotive linear drive of claim 10, further comprising an actuating element is associated with at least one limit switch, said actuating element formed as a slider and guided on guiding elements of the housing along a travel range of the spindle nut, said actuating element operated by the spindle nut and switching the limit switch. 17. The electromotive linear drive of claim 16, wherein the slider includes an engagement member which is formfittingly coupled with the spindle nut an configured to compensate dimensional and positional tolerances caused by a mechanical load and manufacturing tolerances. 18. The electromotive linear drive of claim 16, wherein the at least one limit switch comprises bores or protruding sections constructed as electrical terminals.