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US 7,717,021 B2Granted
Punch tool lift spindle
AssigneeTRUMPF Werkzeugmaschinen GmbH + Co. KG
InventorWerner Erlenmaier
Life of this patent
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Abstract
In one embodiment, a punching machine having a tool bearing, a drive spindle coupled to the tool bearing, and a drive system configured to move the tool bearing axially along a lifting axis and to rotate the tool bearing about the lifting axis, the drive system having a motor system having a stator and a rotor internally coupled to the stator and a spindle nut coupled to the rotor and cooperating with the drive spindle, wherein the spindle nut is at least partially disposed within the stator.
Claims15
A punching machine comprising:
- a tool bearing;
- a drive spindle coupled to the tool bearing;
- a threaded spindle nut sitting on the drive spindle and forming a spindle transmission together with the drive spindle;
- and
- a drive system configured to move the tool bearing axially along a lifting axis and to rotate the tool bearing about the lifting axis, the drive system comprising:
- a motor system comprising a stator and a rotor internally coupled to the stator;
- and
- the rotor coupled to the spindle nut, wherein the spindle nut cooperates with the drive spindle and wherein the spindle nut is at least partially disposed within the stator.
5 more elements
Dependencies are inferred from the claim text.