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US 4,540,332 AGranted
Swivel device
AssigneeFanuc Corporation
InventorsSeiichiro Nakashima, Hajimu Inaba, Shigemi Inagaki
Life of this patent
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Abstract
A swivel device for supporting a swivel unit thereon, including a hollow main frame and a comparatively slender rotatable shaft disposed upright within the hollow frame, connectable to the swivel unit at the upper end thereof and connected to a driving source at the lower end thereof through a transmission mechanism. All control cables and conduits for controlling the mechanisms mounted on the swivel unit are accommodated in the space formed within the hollow frame around the upright shaft.
Claims6
A swivel device for supporting thereon a swivel unit, comprising:
- (a) a base forming a lowermost element of said swivel device;
- (b) a hollow frame means fastened onto said base and defining therein a generally vertically extended space;
- (c) an upright shaft of substantially small diameter relative to the diameter of said hollow frame rotatably supported in substantially the center of said space of said hollow frame means, said upright shaft having an upper end thereof connectible to said swivel unit;
- (d) a drive means connected to a lower end of said upright shaft for rotation, said drive means comprising a driving motor disposed on said base and outside said hollow frame means and a transmission mechanism arranged between said driving motor and said lower end of said upright shaft, and a reduction gear connected to said lower end of said upright shaft;
- and
- (e) cable and conduit means accommodated in said vertically extended space of said hollow frame means and circumferentially disposed around said upright shaft for controlling said swivel unit.
3 more elements
Dependencies are inferred from the claim text.