DE10021233B4 - Storage for cylinders and drums in printing machines - Google Patents

Abstract

Combined arrangement for the mounting of a shaft journal (1) of a cylinder or a drum in a printing machine with at least two radially superposed rolling bearings (5, 6), wherein an eccentric intermediate ring (12) by lying outside of a bearing housing (17) actuating means in Circumferentially pivotable, an outer raceway (13) for the first rolling bearing (5) and an inner raceway (14) for. the second rolling bearing (6) and wherein the rolling bearings (5, 6) for the separate absorption of axial forces are connected to a third rolling bearing, characterized in that the third rolling bearing in a receiving opening of an eccentric disc (27) is received, via the driver elements with the eccentric ring (12) is connected such that it moves in a pivoting movement, the eccentric disc (27) in the same circumferential direction, but in the axial direction relative to the eccentric disc (27) remains displaceable.

Description

Field of application of the invention

The The invention relates to a combined arrangement for the mounting of a shaft journal a cylinder or a drum in printing presses with at least two radially superimposed arranged rolling bearings, being an eccentric intermediate ring passing through outside a bearing housing lying actuating means is pivotable in the circumferential direction, an outer raceway for the first Rolling bearings and an inner career for forms the second rolling bearing and wherein the radially over each other arranged rolling bearings for absorbing axial forces connected to a third camp.

Background of the invention

Such Bearings are used in the printing press industry for the storage of printing cylinders needed wherein the one or more intermediate rings for the exact adjustment of the impression cylinder with eccentric raceways for the radially superimposed Bearings are formed. In particular, in multicolor printing misprints to avoid Such bearings in the radial and in the axial direction sufficiently rigid be.

Such a generic storage for cylinders in printing presses is from the DE 41 26 545 C2 previously known. The three-ring rolling bearing described there consists of one with a pin 4 a blanket cylinder 7 connected inner bearing ring 2.1 of the inner bearing, with a pin 4 concentric outer raceway is provided. The three-ring bearing also has in a bearing housing 1 an outer bearing ring 3.1 an outer warehouse 3 on, with one to the bore of the bearing housing 1 concentric inner raceway is provided. Between inner bearing ring 2.1 and outer bearing ring 3.1 is a career for the inner camp 2 and outer bearings 3 supporting, one-piece eccentric intermediate ring 6 provided by the outside of the bearing housing 1 lying actuating means 5 is pivotable in the circumferential direction.

For radial support are between the with the pin 4 connected inner bearing ring 2.1 and the eccentric intermediate ring 6 on the one hand and between the outer bearing ring 3.1 and the eccentric intermediate ring 6 on the other hand radial bearing rows 10 in the form of cylindrical roller bearing rows 10.1 . 10.2 provided, in addition to a cylindrical roller bearing row 10.1 at least one axial end thrust bearing rows 9 , z. B. Ball bearing rows 9.3 or cross roller thrust bearings 9.1 in the inner camp 2 or ball bearing rows 9.2 in the outer camp 3 are arranged for separate absorption of axial forces.

The disadvantage here is that when pivoting the eccentric ring in the three-ring bearing an axial movement of the eccentric ring 6 in the 0.1 mm range. This axial movement is transmitted via the axial bearing arranged for axial support 9 on the cylinder 7 and thus leads to pressure disturbances.

Summary of the invention

task The invention is therefore a generic bearing assembly for printing cylinder to develop, which is very stable and in particular does not adversely affect the print quality in multicolor printing.

According to the invention this Problem according to the characterizing part of claim 1 solved by that the third rolling bearing in a receiving opening an eccentric disc is received, which via driving elements with the Eccentric ring is connected such that this during a pivoting movement the eccentric disc moves in the same circumferential direction, but in the axial direction opposite to the Eccentric disc remains displaceable.

On In this way, decoupling of radial and axial rolling bearings the overall bearing arrangement is reached, so that by the pivoting triggered the eccentric ring Axial movement does not transfer to the impression cylinder and no deterioration the pressure occurs.

advantageous Further developments of the invention are in the dependent claims 2 to 7 described.

So is provided in a concrete embodiment of the invention according to claim 2, in the eccentric ring, a cam screw passing through the eccentric disk is anchored in the region of the eccentric disc a diameter which is smaller than a diameter of a continuous receiving bore the eccentric and that between eccentric and eccentric on the one hand and between the eccentric disc and a head of the driving screw on the other hand, an axial gap is formed.

The reduced diameter of the driving screw and the two axial gaps ensure that upon pivoting of the eccentric the eccentric disc taken in the circumferential direction, but is not acted upon axially forces. Due to the difference in diameter between driving screw and receiving bore the blockage of the axial displacement due to adhesion is avoided. Due to the axial gap between the screw head and the eccentric disc and between the eccentric ring and eccentric disc, the blockage of the axial displacement due to the shape avoided.

To Another feature of the invention according to claim 3, the third roller bearing be designed as a three-disc axial roller bearing, the one Center disc and two spaced wave washers, between which roll off axial cylindrical roller wreaths.

there should according to claim 4, the middle disc lying over the wave disks Have radial expansion and with this in the eccentric disc be taken, according to claim 5 of this camp on the shaft journal held with the help of a nut on a thread of the shaft journal can be screwed on.

The inventive training As a three-disc thrust roller bearing has the advantage that the negative axial operating clearance in a simple manner on the tightening torque of the retaining nut is adjustable, d. H. the thrust bearing is preloaded. The camp will centered in the eccentric of the thrust bearing unit and through Fastening fixed. This bearing can be made by the bearing manufacturer through spatial adaptation the components involved preset according to the wishes of the customer be so for the customer is no longer required to measure the storage location. A Further simplification results from the use of standardized To store.

To another additional Feature of the invention is provided according to claim 6, that the eccentric disc on a fourth rolling bearing in an outer ring is pivotally received, held in the bearing housing via mounting screws is, wherein according to claim 7, the fourth rolling bearing as a cross roller bearing should be trained.

This on the one hand has the advantage that the fourth rolling bearing of the pivoting movement the eccentric disc opposes only a very low frictional resistance, d. H. the solution very wear-resistant is. On the other hand, designed as a fourth rolling bearing cross roller bearing set free of play by the bearing manufacturer and thus delivered ready for installation become. The customer is here again the total workload for measuring the bearing point and for adapting the bearing components spared.

The Invention will be explained in more detail in the following embodiment.

Short description of the drawing

The single figure shows a longitudinal section through an inventively designed Bearing arrangement for a printing cylinder of a printing press.

Detailed description of the drawing

In the figure, the is about its bearing axis 7 rotatable shaft journals 1 a pressure cylinder shown on the right side in the conical area 2 passes over and in the end area 3 ends, which is smaller in diameter than the area 1 is. In the conical area 2 is the shaft journal 1 in the bearing housing 17 about the three-ring camp 4 radially supported, consisting of the superimposed cylindrical roller bearing 5 and the needle bearing 6 consists. To the cylindrical roller bearing 5 belongs to the inner ring 8th , the three radially outward rims 9 so that the two each in a cage 10 guided cylindrical rollers 11 are held securely in the axial direction. To the cylindrical roller bearing 5 heard further the eccentric ring 12 whose inner lateral surface is the outer raceway 13 for the cylindrical roller bearing 5 forms. To the three-ring camp 4 also belongs the needle bearing 6 with the outer ring 18 in the case 17 is anchored. For each in a cage 15 double row arranged bearing needles 16 forms the eccentric ring 12 , whose outer circumferential surface relative to the bearing axis 7 eccentrically offset, the inner race 14 for the needle bearing 6 , The warehouse 6 performs only small pivoting movements and is lubricated for life, while the cylindrical roller bearing 5 via axial and radial lubricant bores 19 . 20 can be supplied with lubricant.

The shaft journal 1 is in his field 3 via the three-pulley axial roller bearing 21 in the case 17 supported. This consists of the center disc 22 , spaced from the right and left side of the two wave disks 23 and 24 are arranged so that between these two out of cage 25 and cylindrical rollers 26 roll over existing axial cylindrical roller rings. The three-pulley axial roller bearing 21 belonging axial cylindrical roller bearings 40 is in the eccentric disc 27 over his middle disk 22 with the help of the fixing screws 31 held, with the radial extent of the center disc 22 over the radial extent of the two wave washers 23 . 24 lies. The eccentric disc 27 in turn is about the cross roller bearing 28 in the outer ring 29 pivotally mounted, wherein the outer ring 29 about holes 30 and screws, not shown, in the bearing housing 17 is fixed. The entire three-pulley axial roller bearing 21 consists of the axial cylindrical roller bearing 40 , the eccentric disc 27 , the cross roller bearing 28 and the outer ring 29 and is on the shaft journal 1 or on its end 3 with the help of the tightening nut 32 held, which is screwed onto a thread.

eccentric 12 and eccentric disc 27 are through the driving screws 33 connected with their threaded part 34 firmly in the eccentric ring 12 are anchored. To the threaded part 34 closes the shaft part 35 whose diameter is smaller than the receiving bore 36 the eccentric disc 27 is. On the right side is the driving screw 33 through her head 37 completed. Three-ring bearing 4 and three-pulley axial roller bearings 21 are in a neutral position by the driving screws 33 so interconnected that between eccentric ring 12 and eccentric disc 27 on the one hand, the axial gap 38 and between eccentric disc 27 and head 37 the driving screw 33 on the other hand, the axial gap 39 is formed. Now, by an actuator, not shown, the eccentric ring 12 pivoted in the circumferential direction, so raises or lowers according to the arrow of the shaft journal 1 of the printing cylinder in the radial direction upwards or downwards. The pivoting movement of the eccentric ring 12 is through the driving screws 33 on the eccentric disc 27 transferred, ie this pivots in the same way in the circumferential direction, the eccentricities of eccentric 12 and eccentric disc 27 to match. Because of the shaft part 35 the driving screw 33 has a diameter which is less than the receiving bore 36 is and in that ring between eccentric 12 and eccentric disc 27 and between eccentric disc 27 and head 37 the driving screw 33 the axial column 38 and 39 are formed, the unwanted axial displacement of the eccentric ring 12 not on the eccentric disc 27 transfer.

1

shaft journal

2

conical Area

3

end

4

Three-ring bearing

5

Cylindrical roller bearings

6

needle roller bearings

7

bearing axle

8th

inner ring

9

shelf

10

Cage

11

cylindrical roller

12

eccentric

13

Outer race

14

Inner raceway

15

Cage

16

bearing needle

17

bearing housing

18

outer ring

19

axial Lubricant supply hole

20

radial Lubricant supply hole

21

Three slices-axial roller

22

center disc

23

wave washer

24

wave washer

25

Cage

26

cylindrical roller

27

eccentric

28

Crossed roller bearings

29

outer ring

30

drilling

31

fixing screw

32

mother suit

33

driver screw

34

threaded part

35

shank part

36

location hole

37

head

38

axial gap

39

axial gap

40

axial cylindrical roller bearings

Claims (7)

Combined arrangement for the bearing of a shaft journal ( 1 ) of a cylinder or a drum in a printing machine with at least two radially superimposed bearings ( 5 . 6 ), wherein an eccentric intermediate ring ( 12 ), which by outside of a bearing housing ( 17 ) lying in the circumferential direction pivotally, an outer raceway ( 13 ) for the first rolling bearing ( 5 ) and an inner career ( 14 ) For. the second rolling bearing ( 6 ) and wherein the rolling bearings ( 5 . 6 ) are connected for separate absorption of axial forces with a third rolling bearing, characterized in that the third rolling bearing in a receiving opening of an eccentric disc ( 27 ), which via driver elements with the eccentric ring ( 12 ) is connected such that this in a pivoting movement, the eccentric disc ( 27 ) moved in the same circumferential direction, but in the axial direction relative to the eccentric disc ( 27 ) remains displaceable. Bearing arrangement according to claim 1, characterized in that in the eccentric ring ( 12 ) an eccentric disc ( 27 ) entraining driver screw ( 33 ) anchored in the region of the eccentric disc ( 27 ) has a diameter which is smaller than a diameter of a continuous receiving bore ( 36 ) of the eccentric disc ( 27 ) and that between eccentric ring ( 12 ) and eccentric disc ( 27 ) on the one hand and between eccentric disc ( 27 ) and a head ( 37 ) of the driving screw ( 33 ) On the other hand, an axial gap ( 38 . 39 ) is formed. Bearing arrangement according to claim 1, characterized in that the third roller bearing is a three-disc axial roller bearing ( 21 ), which is a center disc ( 22 ) and two spaced wavy washers ( 23 . 24 ), between which roll off axial cylindrical roller rings. Bearing arrangement according to claim 3, characterized in that the middle disc ( 22 ) one over the wave washers ( 23 . 24 ) has radial expansion and with this in the eccentric disc ( 27 ) is recorded. Bearing arrangement according to claim 1, characterized in that the third rolling bearing on the shaft journal ( 1 ) with the help of a mother ( 32 ) is held on a thread of the shaft journal ( 1 ) can be screwed on. Bearing arrangement according to claim 1, characterized in that the eccentric disc ( 27 ) via a fourth rolling bearing in an outer ring ( 29 ) is pivotally received in the bearing housing ( 17 ) is held by fastening screws. Bearing arrangement according to claim 6, characterized in that the fourth rolling bearing is a cross roller bearing ( 28 ).