B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
164/141
B26D 7/24 (2006.01) F16H 35/10 (2006.01)
Patent
CA 2039512
The invention concerns a safety device designed for limitiny the axial operating load exerted on a drive worm (1) situated within a machine assembly. To this aim, the worm (1) is fitted on a rotary shaft (12) of which the first end (12') is connected to a drive shaft (5) and the second end (12") is extended by an non-rotary auxiliary shaft (4) connected to a safety device (S) which, in the event of an axial overload, en- ables the drive worm (1) to be shifted in such a way as to annul the rotary connection of the two shafts (12 and 5) at the first end (12'). The safety device (S) has the shape of a hydraulic jack comprising a tight chamber (64) in which the auxiliary shaft (4) ends up in the shape of a holding piston (44). An adequate application of the oil pressure on either side of the piston (44) enables control of the position of the piston (44) and, hence, of the shifting of the drive worm (1). Such a safety device may be used for controlling the drive worm of a movable beam of a die- cutting press converting board into packages.
Bobst S.a.
Smart & Biggar
LandOfFree
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