CN2913718Y

CN2913718Y - Compound bearing for lithographic offset duplicator

Info

Publication number: CN2913718Y
Application number: CN 200620083412
Authority: CN
Inventors: 孟范祥
Original assignee: WEIFANG DONGHANG PRECISION MACHINE CO Ltd
Current assignee: Weifang Donghang Graphic Technology Inc.
Priority date: 2006-04-21
Filing date: 2006-04-21
Publication date: 2007-06-20
Anticipated expiration: 2016-04-21

Abstract

The utility model discloses a combination bearing on an offset press, which comprises a double-outer-ring double-row spherical roller bearing. Inside an internal cavity of an inner ring of the double-outer-ring double-row spherical roller bearing, a pair of inner ring double-row spherical roller bearings are provided; rotation center of the double-inner-ring double-row spherical roller bearing is eccentrically arranged with that of the double-outer-ring double-row spherical roller bearing; the double-inner-ring double-row spherical roller bearing and the double-outer-ring double-row spherical roller bearing can apply axial pre-loads to eliminate bearing end-play, during which the pre-loads are opposite to each other and counterweigh with each other. Therefore, the pre-loads will not be transmitted to wall panels, for which high stiffness, high rotation speed and high rotary accuracy can be fulfilled on the roller drum, in order to improve printing quality of printing presses; because of the eccentric configuration, rotating the inner rings of the double-outer-ring double-row spherical roller bearing can fulfill approaching, separating and depressing between roller drums. Besides, the utility model has the advantages of simple structure, reliable operation and continuous adjustment.

Description

Combined bearing for offset press

Technical field

The utility model relates to a kind of bearing, relates in particular to the bearing that a kind of offset press is used.

Background technique

The cylinder group of offset press is installed on the offset press wallboard by bearing, bearing housing.Gap in the idler is to make cylinder when rotated, and its rotating center is uncertain in the spatial position, and produce one of reason of rocking.Consequently make on the printedmatter to produce black thick stick, ghost image, phenomenon such as unintelligible, had a strong impact on the quality of printedmatter.Gap in the idler comprises the play in the bearing and the gap in bearing housing and wallboard hole.At the play in the bearing, can be by selecting suitable bearing, as radially thrust ball bearing, tapered roller bearing etc., and apply axial preload to eliminate the radial internal clearance of bearing; But owing to common radially thrust ball bearing, the preload of tapered roller bearing can pass to the offset press wallboard, and can cause the distortion of wallboard, can influence the decline of printing quality equally.And the employing plain bearing can not be realized clutch and pressurization between the cylinder, causes the complicated of offset press structure for realizing clutch and pressurization between the cylinder.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of clutch between the cylinder and pressurization, bearing realized and transfers the crack preload can not pass to the combined bearing for offset press of wallboard.

For achieving the above object, the technical solution of the utility model is: combined bearing for offset press, comprise two outer rings biserial annular tapered roller bearing, be provided with a pair of inner ring biserial annular tapered roller bearing in the inner space of the inner ring of described pair of outer ring biserial annular tapered roller bearing, the inner ring of the outer ring of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing is an integral structure, and the rotating center of described pair of inner ring biserial annular tapered roller bearing is eccentric in the rotating center of described pair of outer ring biserial annular tapered roller bearing.

As a kind of improvement, described off-centre is between the inner ring periphery of the outer ring inner headed face of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing.

Owing to adopt technique scheme, combined bearing for offset press, comprise two outer rings biserial annular tapered roller bearing, be provided with a pair of inner ring biserial annular tapered roller bearing in the inner space of the inner ring of described pair of outer ring biserial annular tapered roller bearing, the inner ring of the outer ring of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing is an integral structure, and the rotating center of described pair of inner ring biserial annular tapered roller bearing is eccentric in the rotating center of described pair of outer ring biserial annular tapered roller bearing; The described pair of inner ring biserial annular tapered roller bearing and the described pair of outer ring biserial annular tapered roller bearing apply axial preload when eliminating the radial internal clearance of bearing, its preload in opposite directions and cancel out each other, therefore preload can not pass to wallboard, can realize the high rigidity of cylinder, high rotating speed, high-precision rotary, improve the printing quality of printing press, reach the purpose of solid clear, the good colour inkless thick stick in the full version of printedmatter site; Because eccentric setting by rotating the inner ring of two outer rings biserial annular tapered roller bearing, can realize clutch and pressurization between the cylinder, and simple in structure, reliable operation, and can adjust continuously.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation;

Fig. 2 is the left view of Fig. 1.

Embodiment

As shown in Figure 1 and Figure 2, combined bearing for offset press, comprise two outer rings biserial annular tapered roller bearing, be provided with a pair of inner ring biserial annular tapered roller bearing in the inner space of the inner ring of described pair of outer ring biserial annular tapered roller bearing, the inner ring of the outer ring of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing is an integral structure, and the rotating center of described pair of inner ring biserial annular tapered roller bearing is eccentric in the rotating center of described pair of outer ring biserial annular tapered roller bearing.

Described off-centre is between the inner ring periphery of the outer ring inner headed face of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing.

Technology contents about two outer rings biserial annular tapered roller bearing and two inner ring biserial annular tapered roller bearings, the 7-189 page or leaf that " mechanical design handbook " (the 4th edition) second of publishing in January, 2002 in Chemical Industry Press rolled up has detailed diagram, its technology is that the common engineers and technicians in present technique field are known, does not repeat them here.

In the present embodiment, the inner ring of the outer ring of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing is an integral structure, and for convenience of description, as shown in Figure 1, we are referred to as centre circle 2.

Specifically, the utility model comprises centre circle 2, the outer surface of centre circle 2 has the raceway of two groups of tapered rollers 4 of race bearing, corresponding is the outer ring 1 of two tapered roller bearings therewith, be provided with retainer 41 between the some tapered rollers 4 of described every circle, be provided with race bearing spacer ring 6 between the outer ring 1 of two tapered roller bearings, race bearing spacer ring 6 is provided with lubrication oil hole 61, the width of race bearing spacer ring 6 has determined the gap of race bearing, match grinding processing as required when mounted is to satisfy the print request of offset press.

The internal surface of centre circle 2 has the raceway of two groups of tapered rollers 5 of inner-ring bearing, corresponding is the inner ring 3 of two tapered roller bearings therewith, be provided with retainer 51 between the some tapered rollers 5 of described every circle, be provided with inner-ring bearing spacer ring 7 between the inner ring 3 of two tapered roller bearings, also be provided with lubrication oil hole 71 on the inner-ring bearing spacer ring 7, the width of same inner-ring bearing spacer ring 7 has determined the gap of inner-ring bearing, also needs match grinding processing when mounted.

Another outstanding characteristics of the present utility model are: the raceway decentraction of the outer surface of the raceway of the internal surface of centre circle 2 and centre circle 2, have certain eccentric amount e between the two, and in the present embodiment, its eccentric amount e is 2-6mm; And the sidewall of centre circle 2 is provided with the oilhole 21 that leads to inner-ring bearing.。

Can realize the clutch and the pressurization of cylinder by rotating centre circle: the connecting rod (not shown) of rotational fixation on centre circle, its rotation drives bearing centre circle 2 by bolt and turns an angle.Because bearing internal layer raceway is eccentric with respect to outer raceway, thereby the inboard raceways center is that centre of the drum's line is also eccentric thereupon, mobile, so just change the centre distance between the cylinder, realized pressurization or release and clutch that the impression with the cylinder cooperating is rolled.

The utility model can realize that centre of the drum apart from adjusting and axially adjusting, has reduced the stress deformation of bearing and wallboard, printing quality and the working life that can improve offset press greatly significantly.

Claims

1. combined bearing for offset press, comprise two outer rings biserial annular tapered roller bearing, it is characterized in that: be provided with a pair of inner ring biserial annular tapered roller bearing in the inner space of the inner ring of described pair of outer ring biserial annular tapered roller bearing, the inner ring of the outer ring of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing is an integral structure, and the rotating center of described pair of inner ring biserial annular tapered roller bearing is eccentric in the rotating center of described pair of outer ring biserial annular tapered roller bearing.

2. combined bearing for offset press as claimed in claim 1 is characterized in that: described off-centre is between the inner ring periphery of the outer ring inner headed face of described pair of inner ring biserial annular tapered roller bearing and described pair of outer ring biserial annular tapered roller bearing.