EP0738591B1 - Transfer cylinder with electric driving unit - Google Patents

Description

The invention relates to a transfer cylinder for Printing machines and an electric motor drive unit for this.

It is known to be a transfer cylinder Printing machine, e.g. B. a pressure cylinder, by a motor to drive that elsewhere in the press is installed and the transmission elements, for. B. a transmission to which the transfer cylinder is connected. With such an arrangement, the transfer cylinder, the engine and possibly the gearbox each have their own bearings in one or several units of the printing press supporting them on, e.g. B. the side walls.

DE-U-9306369 discloses a transfer cylinder according to the preamble of claim 1.

The invention has for its object a mechanical particularly simple and largely backlash-free drive for to create a transfer cylinder.

This object is achieved by those listed in claim 1 Features resolved. Advantageous configurations are in the Subclaims specified.

Because the rotor of the electromotive drive unit together with the transfer cylinder in a common warehouse is stored and the associated stator firmly with the A separate machine can be omitted Bearing for the drive unit. There is also nowhere with any play Power transmission elements. The elimination of bearings, Power transmission elements and the corresponding Holding devices enables a particularly economical Manufacturing.

Direct drives are known per se, for example in Turntables. The cylinders of printing machines on So far you have to drive some similar way not considered because not only the uniform Run of a single cylinder must be ensured but all cylinders are always exactly synchronized with each other must be, and that with considerable drive and Load change forces. As has been shown, these can be Requirements in realizing the invention appropriate choice of engine type and by using a suitable electronic control and regulating device fulfill.

A first type of engine suitable for the invention is an internal rotor motor, the rotor of which at one axial end of the transfer cylinder and on the axis of the Transfer cylinder is arranged, for. B. by a Shaft journal of the transfer cylinder via the associated one Cylinder bearing extended and on its outside is provided with an arrangement of magnets. A Pot-shaped stator that attaches to the press encloses the rotor radially.

As already mentioned, additional storage of the Rotor can be dispensed with. However, the prerequisite for this is a sufficiently high bending stiffness of the shaft journal in order to Collisions of the rotor and stator due to shaft impact avoid.

A second suitable type of motor is an external rotor motor, its rotor through part of the transfer cylinder is formed, on the inside of which magnets are attached.

This provides such rigidity from the outset, that no collisions between rotor and stator are possible.

The high demands on the synchronism behavior of the The best solution is a slow-running, permanent drive excited synchronous motor, its concentricity are optimized, e.g. B. by oblique grooving, sinusoidal Magnetization in the air gap and a sufficiently high one Number of poles.

For synchronism control it is necessary to continuously run the Detect angular position of the transfer cylinder. A Sensor, the appropriate markings on the rotor or on Transfer cylinder scans, is preferably in one fixed installation position integrated in the stator. As a result of that formed by the markings and the sensor Position transmitter at the same end of the transfer cylinder as the rotor is located, there are practically none Angle of measurement error. Due to the high rigidity of the structure you get excellent control properties.

The assembly with the stator is without adjustment effort The whole can be mounted on the printing press and of it removable.

This unit can also be a control and Control electronics and / or power electronics for the included electromotive drive unit so that it is a forms an autonomous drive unit with local intelligence.

Thus, the transfer cylinder and the essential exist Drive components from just two units, firstly one integral unit consisting of transfer cylinder and rotor and second, a stator unit with integrated electronics, what the ease of maintenance of the printing machine benefits.

The drive according to the invention is very robust and has Comparison with known transfer cylinder drives light weight and low construction volume.

In the event that the motor is an external rotor motor, can no conventional cylinder bearings are used on the engine side use the flanged pin. In this case, the invention provides that the Transfer cylinders at least at the end with the engine Form of an open tube, the outside of both the working surface of the transfer cylinder as well Storage area forms, the work surface and the Continuous storage area with the same diameter are trained.

The rotor magnets are on the inside of the open end of the transfer cylinder attached. In addition, you can any within the transfer cylinder additional equipment required for printing be accommodated.

Such a transfer cylinder can also Pull out of the side of the machine without the bearings or the side walls have to be dismantled.

If both ends of the transfer cylinder as an open tube be trained, the transfer cylinder also without complex welding and without extensive machining from a tubular semi-finished product produce. There is no pin deflection and Flange deformation as with conventional ones Transfer cylinders, and the transfer cylinder has the greatest possible rigidity for a given weight.

Such a structure is especially for Transfer cylinder with a continuous work surface suitable that have no longitudinal groove. Such Transfer cylinders can be used with a hard, wear-resistant and high-precision manufactured surface be provided to the work surface of the To impart certain properties to the transfer cylinder, which are primarily of printing importance. Becomes in a transfer cylinder according to the invention entire outer surface so formed the mentioned properties also come from the storage of the Transfer cylinder benefits. In particular, it becomes possible the hard surface at the same time as the bearing surface use and the pressure roller directly on the rolling elements a rolling bearing or in a plain bearing.

A tubular design of the transfer cylinder comes not only with an external rotor motor, but also with an internal rotor motor. In this case the rotor preferably as a substantially cylindrical Component formed that laterally from the Transfer cylinder protrudes, being radial from one cup-shaped stator is enclosed.

Fig. 1

den prinzipiellen Aufbau eines Übertragungszylinders mit einem integrierten Innenläufer-Motor;

Fig. 2

den prinzipiellen Aufbau eines Übertragungszylinders mit einem integrierten Außenläufer-Motor;

Fig. 3

einen rohrförmigen Übertragungszylinder mit einem integrierten Innenläufer-Motor;

Fig. 4

einen rohrförmigen Übertragungszylinder mit einem integrierten Außenläufer-Motor; und

Fig. 5a bis 5d Fig. 5a bis 5d

verschiedene Arten von Zylinderlagerungen, die bei den rohrförmigen Übertragungszylindern verwendet werden können.

Further features and advantages of the invention result from the following description of several exemplary embodiments and from the drawing, to which reference is made. The longitudinal section shows:

Fig. 1

the basic structure of a transfer cylinder with an integrated internal rotor motor;

Fig. 2

the basic structure of a transfer cylinder with an integrated external rotor motor;

Fig. 3

a tubular transfer cylinder with an integrated internal rotor motor;

Fig. 4

a tubular transfer cylinder with an integrated external rotor motor; and

Fig. 5a to 5d Fig. 5a to 5d

different types of cylinder bearings that can be used with the tubular transfer cylinders.

In Fig. 1, a transfer cylinder 1 has at each end a shaft journal 2, 3 on the ball bearings 4, 5 in Side walls 6, 7 of a printing press are mounted.

The shaft journal 3 is beyond the ball bearing 5 extended outside. On the extended part 8 of the Shaft journal 3 is a cylindrical sleeve 9 in a force-locking manner pressed on, pre-assembled on the outside Permanent magnets 10 are arranged.

The rotor formed in this way is concentric of a stator enclosed by electromagnet 11 is formed on the cylindrical inside of a Pot-shaped stator housing 12 are attached, with its open side attached to the side wall 7 of the printing press is.

In Fig. 2, in the with the embodiment of Fig. 1 in essentially matching elements with the same Is a Transfer cylinder 20 at one end as in FIG. 1 educated. At its other end, the Transfer cylinder 20 no shaft journal, but is formed as an open tube that in one of his Outer diameter corresponding ball bearing 21 in the Side wall 7 of the printing machine is mounted. In the open The end of the transfer cylinder 20 is a non-positively cylindrical sleeve 22 pressed, on the inside Pre-assembled permanent magnets 23 are arranged. As a rotor serves the transfer cylinder to be driven 20 in Connection with the sleeve 22 and the permanent magnet 23rd

The associated stator is by electromagnet 24 formed on the outside of a cone-shaped part a stator housing 25 are attached. The stator housing 25 is so attached to the side wall 7 of the printing press that its cone-shaped part with the electromagnet 24 concentric in the arrangement of the permanent magnets 23 immersed.

In Fig. 3 is a transfer cylinder 30 in the form of a continuous straight tube shown that extends lengthways an axis 32 extends. The outer surface of the Transfer cylinder 30 is an extremely hard, wear-resistant and high-precision ceramic surface, which, with the same diameter everywhere, is both axial middle cylindrical work surface 33 as well Bearing surfaces 34 and 35 at the axial ends of the Transfer cylinder 30 forms. In other words, make up the working surface 33 and the bearing surfaces 34 and 35 together a continuous surface with the same everywhere Diameter.

The bearing surfaces 34 and 35 are for axial rotatability of the transfer cylinder 30 in radial bearings 36 and 37 stored on the side walls 38 and 39 of the printing press are attached. The bearing surfaces 34 and 35 run immediately on rolling elements 40 and 41 of the radial bearings 36, 37.

Adjacent to the bearing surface 35 and entirely on an axial At the end, the transfer cylinder 30 has an annular shape Thrust bearing surface 42 with a slightly smaller diameter than that Storage area 35 on. Between one through the Reduced diameter formed shoulder 43 am Transfer cylinder 30 and one at its end screwed annular plate spring 44 sits Thrust bearing 45 on thrust bearing surface 42. Thrust bearing 45 contains rolling elements 46 which axially transfer cylinder 30 lead, and is just like the radial bearing 37 on the Side wall 39 attached.

The transfer cylinder 30 shown in Fig. 3 can be very simply disassemble by loosening the thrust bearing 45 is pulled out of the side of the printing press. While the transfer cylinder 30 in the shown Embodiment can be pulled out on both sides can, because the working surface 33 and the bearing surfaces 34 and 35 have the same diameter, are also embodiments possible where z. B. the diameter of the bearing surface 34 slightly larger or the diameter of the bearing surface 35 somewhat is smaller than the diameter of the working surface 3, so that the transfer cylinder 30 at least to one side can be pulled out. On the other hand, a tube with the substantially uniform surface, as in FIG. 1 shown, of course the easiest to manufacture.

In one end of the transfer cylinder 30 is concentric cylindrical rotor 47 is pressed, which is not in detail contains permanent magnets shown and the over the end of the Transfer cylinder 30 also protrudes. The above Part of the rotor 47 is radially surrounded by electromagnets 48, which are fixed in a stator housing 49. The Stator housing 49 is on the side wall 38 of the printing press attached by z. B. a clamping device, not shown the stator housing 49 presses against the side wall 38, wherein the stator housing 49 is axially fixed by pins 50. This makes it easy to assemble and disassemble the Stator housing 49 possible.

At the outer axial end of the rotor 47 is one Marking disk 51 attached. The stator housing 49 contains one or more sensors 52 adjacent to the Marking disc 51 are arranged with an air gap between. The marking disc 51 and the or Sensors 52 form a position sensor for the Angular position of the rotor 47 or Transfer cylinder 30. The position transmitter has one Resolution of 1000 periods per revolution or more, depending of the respective requirements for the synchronism behavior.

In the stator housing 49 there are also a control and Control electronics 53 and power electronics 54 housed, as shown schematically. The Power electronics 54 is via not shown Power supply lines with a power supply to the Printing machine connected and supplies the electromagnets 48th depending on control signals of the tax and Control electronics 53 with electricity. The tax and Control electronics 53 forms together with the Power electronics 54, the motor and the position transmitter, with whose sensor or sensors 52 it is connected to, one Control circuit for the synchronization control of the Transfer cylinder 30. For synchronization with further transfer cylinders or for a control and Control of cylinder rotation is the control and Control electronics 53 connected to a machine computer.

Fig. 4 is an embodiment of a tubular Transfer cylinder with an integrated Outrunner motor. Parts with the embodiment of Fig. 3 match, are with the same reference numerals designated.

In Fig. 4 are in a transfer cylinder 60 which in remaining with the transfer cylinder 30 of FIG. 1st matches, at one axial end on its inside a number of magnets 61 embedded. Inside the Transfer cylinder 60 is a stator shaft 62, carries the magnetic coils 63 that hold the magnet 61 opposite. The stator shaft 62 extends through the entire transfer cylinder 60 and is on both Ends attached to the press, as schematically indicated. This results in a particularly high one Stiffness of the stator.

Just like in the embodiment of FIG. 3, too in the embodiments of Figures 1, 2 and 4 Position transmitter, control and regulating electronics and one Power electronics can be integrated into the stator.

In addition, a transmission cylinder drive from possible on both sides by using both ends of the Transfer cylinder with drives of the type shown be provided.

5a to 5d show several alternatives for storage a tubular transfer cylinder 70 in one Side wall 71. The use of a rolling bearing 72 with inner and Outer ring, as shown in Fig. 5a, is advantageous if the bearing surface of the transfer cylinder is not immediate should or can be claimed. Instead of the one in FIG. 3 or 4 illustrated needle bearings can be used as ball bearings Rolling bearings are used, as in Fig. 5a or 5b shown. The balls of a ball bearing can also be used directly roll on the bearing surface of the transfer cylinder 70, as in Fig. 5b using a roller bearing 73 without an inner ring shown.

As indicated in Fig. 5c without details, further Rolling elements directly without the interposition of bearing rings both on the transfer cylinder 70 and on one in Roll the side surface 71 formed bearing surface 74. Finally, the rolling elements can also be omitted if one Plain bearing of the transfer cylinder 70 in one Bearing bush 75 is used, as shown in Fig. 5d.

Transfer cylinder with electromotive drive unit REFERENCE SIGN LIST

1

Transfer cylinder

2nd

Shaft journal

3rd

Shaft journal

4th

ball-bearing

5

ball-bearing

6

Side wall

7

Side wall

8th

extended part

9

Sleeve

10th

Permanent magnets

11

Electromagnets

12th

Stator housing

20th

Transfer cylinder

21

ball-bearing

22

cylindrical sleeve

23

Permanent magnets

24th

Electromagnets

25th

Stator housing

30th

Transfer cylinder

32

axis

33

Work surface

34

storage area

35

storage area

36

Radial bearing

37

Radial bearing

38

Side wall

39

Side wall

40

Rolling elements

41

Rolling elements

42

Axial bearing surface

43

shoulder

44

Belleville spring

45

Thrust bearing

46

Rolling elements

47

rotor

48

Electromagnets

49

Stator housing

50

pencils

51

Marker disc

52

Sensors

53

Control and regulating electronics

54

Power electronics

60

Transfer cylinder

61

Magnets

62

Stator shaft

63

Solenoids

70

Transfer cylinder

71

Side wall

72

roller bearing

73

roller bearing

74

storage area

75

Bearing bush

Claims (7)

1. Transfer cylinder with electromotive drive unit, a rotor of the electromotive drive unit and a transfer cylinder (1; 20; 30; 60) having a common bearing (5; 21; 40) in a printing machine unit (7; 38) supporting them, characterized in that the transfer cylinder (20; 30; 60; 70) has, at one axial end or both axial ends, the form of an open tube, the outside of which forms both the working face (33) and the bearing face (34; 35), the working face and the bearing face being designed continuously and with the same diameter, and in that the outer surface of the transfer cylinder (20; 30; 60; 70) is suitable for direct mounting between rolling bodies (40; 41) of a rolling bearing (36; 37; 73) or in a sliding bearing (75).
2. Transfer cylinder according to Claim 1, characterized in that the electromotive drive unit is an internal-rotor motor, the rotor being arranged at one axial end of the transfer cylinder (1; 30) and on the shaft of the transfer cylinder.
3. Transfer cylinder according to Claim 2, characterized in that the rotor is formed by a lengthened shaft journal (8) of the transfer cylinder (1), magnets (10) being fastened to the outside of the said shaft journal.
4. Transfer cylinder according to Claim 1, characterized in that the electromotive drive unit is an external-rotor motor, the rotor being formed by a hollow part of the transfer cylinder (20; 60), magnets (23; 61) being fastened to the inside of the said hollow part.
5. Transfer cylinder according to one of the preceding claims, characterized in that the electromotive drive unit is a synchronous motor, and in that the magnets of the rotor are permanent magnets.
6. Transfer cylinder with electromotive drive unit according to one of the preceding claims, characterized in that the electromotive drive unit consists of the rotor and of a part (49) which is capable of being connected fixedly to a printing machine and into which a stator (48) and a sensor (52) for sensing the position of the transfer cylinder are integrated.
7. Transfer cylinder according to Claim 6, characterized in that, furthermore, control and regulating electronics (53) and/or power electronics (54) for the electromotive drive unit are integrated into the part capable of being connected fixedly to the printing machine.

Images