Eccentric bearings for printing machines
An eccentric bearing and bearing technology, used in printing presses, rotary printing presses, printing and other directions, can solve the problems of poor printing effect and blurred surface patterns of printed products, and achieve clear surface patterns, good printing effects, and radial vibration. Effects of small time and amplitude
Active Publication Date: 2019-03-15
SCHAEFFLER TECH AG & CO KG
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Problems solved by technology
[0007] The problem solved by the present invention is that when the surface of the printing plate has embossed lines, the surface pattern of the printed product obtained by using the existing eccentric bearing printing machine is blurred, and the printing effect is not good
Method used
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[0027] refer to figure 2 , the eccentric bearing used for the printing machine of the present embodiment includes: the first bearing 10 and the second bearing 20, the first bearing 10 and the second bearing 20 share a central circle 30, the central circle 30 is an eccentric circle, and the center of its inner circle It is not concentric with the center of the outer circle and has an eccentricity greater than 0, and the center ring 30 can rotate at a certain angle in the circumferential direction.
[0028] The first bearing 10 includes an inner ring 11 , a center ring 30 surrounding the inner ring 11 and a first group of rolling elements 12 located between the center ring 30 and the inner ring 11 . The first group of rolling elements 12 is divided into multiple rows along the axial direction. The first bearing 10 is used to control the radial movement of the cylinder of the printing press along the central axis of the inner ring 11 . Specifically, one axial end of the cylinde...
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The invention relates to an eccentric bearing for a printing machine. The eccentric bearing comprises a first bearing and a second bearing, wherein the first bearing and the second bearing share a center ring; the first bearing comprises an inner ring, the center ring and a first group of rolling bodies; the second bearing comprises the center ring, an outer ring and a second group of rolling bodies; the second group of rolling bodies are divided into at least two lines along the axial direction; at least one of the center ring and the outer ring is an eccentric ring; the eccentric bearing also comprises an oil hole passes through one side surface in the axial direction of the outer ring; the outer circumferential surface of the center ring between the two adjacent lines of rolling bodies in the second group of rolling bodies is provided with a coating, and a radial gap is formed between the coating and the outer ring; or the inner circumferential surface of the outer ring is provided with a coating, and a radial gap is formed between the coating and the center ring; or the outer circumferential surface of the center ring and the inner circumferential surface of the outer ring are provided with coatings, and a radial gap is formed between the two coatings; the oil hole is communicated with the gap; and the surface of the coating can adsorb oil in the gap. The oil in the gap can buffer the radial vibration of a rolling tube, so that patterns on the surface of an obtained printed finished product are clear and distinguishable.
Description
technical field [0001] The invention relates to the technical field of printing machines, in particular to an eccentric bearing used in printing machines. Background technique [0002] A current printing press generally includes a printing plate cylinder, an impression cylinder and a blanket cylinder positioned between the printing plate cylinder and the impression cylinder. At the beginning of printing, the axis of the rubber cylinder should be moved radially to realize the radial pressure of the rubber cylinder with the plate cylinder and the impression cylinder respectively; Cylinder and impression cylinder are radially separated from each other. In addition, when the thickness of the printing paper at the pressing position of the blanket cylinder and the impression cylinder changes, it is also necessary to adjust the gap between the blanket cylinder and the impression cylinder according to the paper thickness to adjust the pressure. [0003] Existing printing machines ...
Claims
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IPC IPC(8): B41F13/28
Inventor 张淼拉尔夫·戴希特
Owner SCHAEFFLER TECH AG & CO KG