Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1999-01-29
2000-09-12
Enad, Elvin
Electrical generator or motor structure
Dynamoelectric
Rotary
310 78, 310 83, 310 84, 310 75D, 310 66, 310 92, H02K 710
Patent
active
061181951
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a cylinder drive for a rotary printing press.
DESCRIPTION OF THE PRIOR ART
A cylinder drive for a rotary printing press in accordance with the prior art is known from DE 41 38 479 C2. A cylinder, which is shiftable in a lateral frame by means of an eccentric bush, is directly driven by means of an electric motor. To this end, a rotor of the electric motor is fixedly connected with a journal of the cylinder. A stator of the electric motor is fixedly connected with the lateral frame by means of a separate connecting device.
In this prior art device it is disadvantageous that an elaborate device for following up the stator is required. In addition, the stator and the rotor of the electric motor are not seated directly rotatable in relation to each other, so that an even air gap between the rotor and the stator is not assured. Such inaccuracies can occur, in particular, because of inaccuracies during manufacture, assembly errors or because of the follow-up separate connecting device itself. Undesired vibrations can occur because of this which, for example, can lead to mackling of the printed image.
DE 44 22 097 A1 describes an arrangement of an electric motor for driving a printing cylinder of a rotary printing press, which printing cylinder is rotatably or shiftably seated in an adjustable eccentric bush. In this device, the rotor of the electric motor is rigidly connected with the cylinder.
DE 44 30 693 A1 discloses an offset rotary printing press with a printing unit having a cylinder seated in an eccentric bush. This cylinder is directly driven by means of an electric motor, wherein a stator of the electric motor is rigidly fastened on a journal of the cylinder.
DE 34 32 572 A1 discloses a cylinder drive, wherein a rotor of an electric motor is connected with a journal of the cylinder by means of a quick-release coupling. This quick-release coupling rigidly connects the cylinder journal and the motor rotor.
SUMMARY OF THE INVENTION
The object of the present invention is directed to creating a cylinder drive for a rotary printing press.
In accordance with the invention, this object is attained by utilizing an electric motor to drive a cylinder of a rotary printing press. The cylinder is rotatably supported in an eccentric bush or bushing which, in turn, is shiftably seated in a lateral or side frame of the press. Shifting of the eccentric bushing will change the position of the axis of rotation of the cylinder. The rotor of the electric motor is connected to the journal of the cylinder by a compensation coupling or clutch which accommodates these changes in the location of the axis of rotation of the cylinder journal.
The advantages which can be achieved with the present invention reside, in particular, in that no relative movement between the stator and the rotor of an electric motor driving the cylinder will occur when the cylinder is displaced or shifted. In this way, an even air gap between the stator and the rotor is assured, so that good running properties of the electric motor are surely provided at all times.
A flanged motor, for example, is used with the cylinder drive in accordance with the present invention, and whose flange is fastened directly on the front of an eccentric bush receiving the cylinder. No elaborate separate connecting devices are required for this. Production and installation costs, as well as inaccuracies, are minimized.
If the cylinder and the electric motor are connected with each other by means of a coupling, the latter can be installed so that it compensates for errors, such as for example, axial offset, inclined position of the axes, or angular errors, so that such errors have no effect on the service life or running properties of the electric motor, for example. This is particularly advantageous in connection with cylinders which can be adjusted by means of an eccentric bush, since the cylinder can be differently stressed as a function of the position of the eccentric bush and therefore an axial offset, for exa
REFERENCES:
patent: 3753016 (1973-08-01), Klein
patent: 3945266 (1976-03-01), Dufour et al.
patent: 4602262 (1986-07-01), Milligan et al.
patent: 4707712 (1987-11-01), Buckley et al.
patent: 4935683 (1990-06-01), Kolber et al.
patent: 5293107 (1994-03-01), Akeel
patent: 5497220 (1996-03-01), Inomata et al.
patent: 5610491 (1997-03-01), Gotz
patent: 5656909 (1997-08-01), Gotz
patent: 5668455 (1997-09-01), Gotz
Enad Elvin
Koenig & Bauer Aktiengesellschaft
LandOfFree
Electric motor drive for eccentrically supported cylinder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric motor drive for eccentrically supported cylinder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric motor drive for eccentrically supported cylinder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-98658