Abstract:
A cylinder of a rotary printing press is driven by a hollow shaft electric motor. The cylinder is supported in eccentric bushings and can be re-positioned. A coupling assembly, that includes two couplers and a connector shaft, is used to connect the shiftable cylinder to the fixed motor.

Description:
FIELD OF THE INVENTION 
     The present invention relates to the drive of a cylinder or a roller of a rotary printing press A hollow shaft motor is coupled to the cylinder or roller by couplings that compensate for angular deviations. The couplings are connected by a connector that is situated in the hollow shaft of the hollow shaft motor. 
     DESCRIPTION OF THE PRIOR ART 
     DE 94 22 044 U1 and DE 43 22 744 A1 respectively describe a directly driven cylinder of a rotary printing press. This cylinder is movably seated in eccentric bushings and is driven by an also movable electric motor. 
     U.S. Pat. No. 4,831,858 A discloses a drive for a vertically operating mill. Here, an end, which faces away form the mill, of a hollow shaft motor is connected by means of a uneversal joint with the mill. The mill itself is arranged fixed in place. The object of this patent is the reduction of the structural height. 
     GB 1,160,538, shows a drive for a cylinder, which is intended to be placed obliquely. The journal of the cylinder is seated by means of a rolling bearing in an eccentric bushing. The gear wheel is rotatably arranged on the eccentric bushing. The drive gear wheel and the journal are connected by means of a double-jointed coupling. It is the object of this arangement to prevent interference in the meshing of teeth. 
     SUMMARY OF THE INVENTION 
     The invention present is based on the object of creating a drive for a cylinder or a roller of a rotary printing press. 
     In accordance with the invention, this object is attained by the utilization of a hollow shaft motor to drive the cylinder or the roller. The motor is fixed in place while the axis of rotation of the cylinder or roller is shiftable. The motor rotor and the cylinder are both provided with couplings which compensate for angular deviation. These couplings can be joined by a connector arranged in the hollow shaft of the motor. 
     The advantages to be obtained by means of the invention consist in particular in that in connection with rotating components, whose rotating shaft is movable, or respectively whose position can be changed, a change in the tilt angle of a connector between the components and the drive motor is minimized. Stresses on compensation couplings are reduced in this way. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     A preferred embodiment of the present invention is represented in the drawings and will be explained in greater detail in what follows. 
     Shown are in: 
     FIG. 1, a schematic representation of a drive of a rotating component in accordance with the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A journal  01  of a rotating component  02 , for example a roller of an inking, or of a dampening unit, or of a cylinder  02  of an inking system, or of a folding apparatus, of a rotary printing press is movably seated in a lateral frame  03  by means of an eccentric bushing  04 . Here, a journal  01  of the cylinder  02  is seated by means of a bearing  06  in a bore  07  of the eccentric bushing  04 . A longitudinal axis  08  of this bore  07  of the eccentric bushing  04  is offset by an eccentricity e 4  with respect to a longitudinal axis  09  of an exterior surface  11  of the eccentric bushing  04 . This eccentric bushing  04  is arranged in the lateral frame  03  to be pivotable by means of a drive, not specifically represented. 
     A first coupling half  13  of a first coupling  14 , for example a spring washer coupling, is fastened at an end of the journal  01  which is remote from the cylinder on a cylinder journal flange  12 , which is fixed in place on the journal. A torsion-proof transmission element  17 , for example a washer made of spring steel, is arranged on this first coupling half  13  by means of a threaded bolt  16 . This transmission element is also connected, in a torsion-proof manner, with a second coupling half  18  by means of threaded bolts. 
     An outer ring of a rolling bearing, for example of an adjustment bearing  19 , with this outer ring having a concave interior surface, is arranged in a bore of the first coupling half  13 . This adjustment bearing  19  is provided for assuring an exact radial alignment of the two coupling halves in respect to each other. An inner ring of the adjustment bearing  19 , with this ring having a convex exterior surface, is fastened on a sleeve of the second coupling half  18 . A connector flange  21  of a connector shaft  22 , which connector shaft  22  may be, for example a torsion-proof shaft  22 , is screwed to a front face of the second coupling half  18  which is remote from the cylinder. A second end of the connector shaft  22  which is remote from the cylinder  02  is connected, for example by means of a clamping element, with a first coupling half  23  of a second coupling  24 . In cooperation with the first coupling  14 , the second coupling  24  is constructed to form a compensation coupling  14 ,  24  for compensating for angular displacement. In the second coupling  24 , the first coupling half  23  is connected by means of a torque-proof transmission element  26  and an adjustment bearing  27  with a second coupling half  28 . 
     The second coupling half  28  of the second coupling  24  is connected with a rotor end  29 , which is remote from the cylinder, of a rotor  31  of a motor  32 , for example a hollow shaft position- and/or rpm-controlled electric motor  32 . A transfer of a torque from the motor  32  to the cylinder journal  01  preferably takes place exclusively from the rotor end  29 , which is remote from the cylinder  02 , of the rotor  31 . An end of the rotor  31  which is close to the cylinder has no torque-transmitting connection with the cylinder journal  01 . 
     This rotor  31  of the hollow shaft motor  32  has a hollow shaft  33 . A length “ 133 ” of this hollow shaft  33  is less than a length “ 122 ” of the connector  22 . 
     The rotor  31  is seated rotatably in respect to a stator  36  of the hollow shaft motor  32  by means of bearings  34 , for example rolling bearings. 
     The stator  36  is screwed, by means of its stator flange  37 , on a support  38  that is fixed in place on the lateral frame. The motor  32  is also fastened, fixed in place, on the lateral frame  03 . The location of this motor  32  can be finely adjustable, but only during mounting. 
     In a first position, an axis of rotation  43  of the cylinder  02  and an axis of rotation  44  of the rotor  31 , as well as the axis of rotation  46  of the connector shaft  22  are parallel in relation to each other and are aligned. The cylinder  02  is brought into a second position by pivoting the eccentric bushing  04 . Because of this, the position of the axis of rotation  43  of the cylinder  02  changes. This axis of rotation  43  can now be, for example, offset parallel in respect to the axis of rotation  44  of the motor  32 . This is the case when both eccentric bushings  04  of the journals  01  of the cylinder  02  are equally pivoted. This cylinder axis of rotation  43  can also be placed obliquely at an angle in respect to the axis of rotation  44  of the motor  32  if for example, only one eccentric bushing  04  was pivoted. 
     In the preferred embodiment, the axis of rotation  43  of the cylinder  02  is offset parallel with the axis of rotation  44  of the motor  32 . Because of this, the end of the connector shaft  22  which is close to the cylinder  02  is displaced, while the end which is remote from the cylinder  02  and which is connected with the rotor  31  remains in place. The axis of rotation  46  of the connector shaft  22  is now arranged inclined at an angle α in relation to the axis of rotation  44  of the rotor  31 . 
     The drive in accordance with the present invention is preferably used for directly driven cylinders; i.e. cylinders, without interposed gears. These cylinders can be individually driven or, for example, can also drive further cylinders, for example via gear wheels. 
     While a preferred embodiment of a drive for a rotary component of rotary printing press in accordance with the present invention has been set forth fully and completely hereinabove, it will be apparent to one of skill in the art that a number of changes in, for example, the specific type of cylinder being driven, the type of rotary printing press, and the like could be made without departing from the true spirit and scope of the present invention which is accordingly to be limited only by the following claims.