Electrical stressing means
AssigneeRoehm GmbH
InventorsJohann Taglang, Thorsten Kusnik
Life of this patent
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Abstract
The invention relates to an electrical stressing means having a housing (2) which can be attached to the drive spindle of a machine tool and in which a threaded rod (3) for adjustment of the clamping jaws of a chuck is mounted such that it can be moved axially, and having an electric actuating motor (4), whose rotor is connected for drive purposes to a drive wheel (6). The drive wheel (6) is connected to the shaft generator (7) of a harmonic drive, and the internal gearwheel (8) of the harmonic drive is connected to the housing (2), with the steel bush (9) (flexspline), which has an external tooth system, of the harmonic drive being provided as a drive for the spindle nut associated with the threaded rod (3).
Claims18
An electrical actuator comprising
- a housing that can be attached to the drive spindle of a machine tool;
- a threaded rod for moving the jaws of a chuck and movable axially in the housing;
- a nut threaded on the rod;
- an electric actuating motor having a rotor connected to a drive wheel;
- and
- a harmonic drive having a wave generator connected to the drive wheel, a circular spline connected to the housing, and an externally toothed flexspline operatively connected to the nut for rotation of the threaded rod by the electric motor.
Dependencies are inferred from the claim text.