Direct drive for a cylinder of a converting machine
View Patent ↗The invention relates to a direct drive for a cylinder of a converting machine, in particular a printing press or coating machine that converts sheet-type printed materials. The aim of the invention is to develop a direct drive for a cylinder of the afore-mentioned type in such a way that the required lateral corrections are significantly reduced. To this end, the direct drive includes a rotor ( 14 ) that is detachably mounted on the end of the cylinder ( 6, 10 ) and a stator ( 15 ) that is concentric with the rotor and is detachably fixed to the side frame ( 13 ). A register motor ( 16 ), which is fixed to the frame, is coupled to gearing ( 17, 18 ) and this gearing ( 17, 18 ) is coupled to a helical gear or screw drive ( 19, 2, 21, 22 ), which is in turn coupled to the cylinder ( 6, 10 ) by means of an axial/rotative coupling ( 23, 24 ).
1. A direct drive for a cylinder of a converting machine with at least one printing or coating unit, wherein the cylinder is mounted in a side frame and is mechanically decoupled from a printing material transport drive acting on one or more sheet transport cylinders of the printing or coating unit, the direct drive comprising:
a rotor detachably mounted to an end of the cylinder, the rotor having an annular construction;
a stator concentrically arranged relative to the rotor and detachably mounted on the side frame;
a register motor supported on the side frame and coupled with a gear drive, the register motor being arranged in the interior of the rotor; and
a screw drive coupled to the gear drive, the screw drive being coupled to the cylinder by an axial/rotating coupling.
2. The direct drive according to claim 1 wherein:
the rotor is coupled by circuitry to a machine controller;
the gear drive is formed by a pinion gear on the register motor and a second gear engaging with the pinion gear;
the second gear is coupled with the screw drive with the second gear being fixed to a register shaft, the register shaft having a threaded spindle that forms a screw link in a mounting structure fixed to the frame, a first end of the register shaft being mounted to the mounting by an axial guide; and
the axial/rotating coupling being arranged a second end of the register shaft, the axial/rotative coupling including a two-sided axial bearing on the register shaft and a disk that is coupled with the rotor and rotatively engages the axial bearing.
3. The direct drive according to claim 1 wherein the cylinder is a plate cylinder.
4. The direct drive according to claim 1 wherein the cylinder is a form cylinder.
5. The direct drive according to 2 wherein the register motor, the mounting structure and the stator are detachably mounted on the side frame.
6. The direct drive according to claim 2 wherein the rotor is detachably connected to the cylinder by a flange and the disk detachably fixed to the flange.
7. A direct drive for a cylinder of a converting machine with at least one printing or coating unit, wherein the cylinder is mounted in a side frame and is mechanically decoupled from a printing material transport drive acting on one or more sheet transport cylinders of the printing or coating unit, the direct drive comprising
a rotor detachably mounted to an end of the cylinder;
a stator concentrically arranged relative to the rotor and detachably mounted on the side frame, the rotor being coupled with the cylinder by a flange;
a bearing that supports a freely rotating intermediate gear is arranged on a circumference of the flange; and
an input drive engageable with the intermediate gear so as to produce an output drive for driving another assembly of the converting machine.
8. The direct drive according to claim 7 further including a register motor supported on the side frame, the register motor being coupled with the gear drive and being arranged in an interior of the rotor, the gear drive being coupled with a screw drive that is coupled with the cylinder by an axial/rotative coupling.
9. The direct drive according to claim 8 wherein:
the register motor is coupled by circuitry to a machine controller;
the gear drive is formed by a pinion gear on the register motor and a second gear engaging with the pinion gear;
the second gear is coupled with the screw drive with the second gear being fixed to a register shaft, the register shaft having a threaded spindle that forms a screw link in a mounting structure fixed to the frame, a first end of the register shaft being mounted to the mounting by an axial guide; and
the axial/rotating coupling being arranged a second end of the register shaft, the axial/rotative coupling including a two-sided axial bearing on the register shaft and a disk that is coupled with the rotor and rotatively engages the axial bearing.
10. The direct drive according to claim 7 wherein the other assembly of the converting machine driven via the input drive engageable with the intermediate gear comprises a component of a metering device.
11. The direct drive according to claim 7 wherein the cylinder is a plate cylinder.
12. The direct drive according to claim 7 wherein the cylinder is a form cylinder.