Patent ID: 7199494
Filing Date: 2007-04-03
Classification: B23Q

Abstract:
1. An electric linear actuator with a main housing having a take-off element supported thereon in a linearly adjustable fashion, wherein said take-off element is coupled to and driven by an output part of a spindle drive arranged in the main housing, and wherein a rotatable input part of said spindle drive is connected to and driven by an electric motor arranged on a rear side of the main housing via a coupling, wherein the coupling comprises a plug-type coupling in the form of a gear transmission comprising a first transmission gear that is connected in a torsionally rigid fashion to the input part of the spindle drive and mounted in a fixed position relative to the main housing, as well as a second transmission gear that is connected to the electric motor, wherein the second transmission gear forms part of a motor module together with the electric motor, and wherein the motor module can be attached to and removed from the rear side of the main housing independently of the instantaneous relative position between the input part and the output part of the spindle drive, and in such a way that the teeth of the two transmission gears are simultaneously engaged or disengaged upon the respective attachment or removal of the motor module, and wherein one of said main housing and said motor module includes a bearing part fixed thereto and projecting outwardly from a mounting face thereof and the other of said main housing and said motor module includes a recess formed in a mounting face thereof, said bearing part being fitted into said recess to center said motor module with respect to said main housing.