Ink oscillating device for offset machine

Abstract

The invention relates to an ink oscillating device for an offset machine, comprising an ink oscillating rod, an ink oscillating rod rotating shaft, an ink oscillating gear, two bearing pedestals and two bearings. The ink oscillating device for the offset machine is characterized by further comprising an end-face cylindrical cam, a fastening mechanism, two cam rollers and two roller connecting shafts. The end-face cylindrical cam is provided with a round sliding through hole in the axis direction; the ink oscillating rod rotating shaft is arranged in the round sliding through hole; the cylindrical surface of the end-face cylindrical cam is connected with the inner side wall of the ink oscillating rod through a fastening mechanism; the two cam rollers are arranged on the ink oscillating rod rotating shaft through the two roller connecting shafts and are located at the two ends of the end-face cylindrical cam; and the two cam rollers are in contact match with the corresponding end surfaces. The ink oscillating device for the offset machine has a simpler and compacter structure; the ink oscillating gear cannot slide on the shaft to wear, so that the transmission precision and the service life of the ink oscillating gear cannot be affected, and the ink oscillating gear has longer service life; and the ink oscillating amount of the ink oscillating rod can be adjusted conveniently by adjusting the installation position of the cam rollers on the roller connecting shafts.

Description

technical field [0001] The invention relates to a printing device, in particular to an ink string device of an offset printing machine. Background technique [0002] The role of the inking device of the offset printing machine is to twist and thin the ink layer through the mutual rolling between the ink roller and the ink distribution roller, and the simultaneous axial movement of the ink roller. There are generally three schemes in the prior art: one is the crank rocker mechanism type, on one side (operating surface) of the wallboard of the offset printing machine, the power drive is the inking gear installed on the inking roller shaft, thereby driving the inking The roller rotates in the circumferential direction, and a crank and rocker mechanism is installed on the other side (transmission surface) of the wallboard of the offset printing machine. The connecting rod drives the string ink roller to move axially through the roller on the swing rod. Adjustable, but the disad...

AI Technical Summary

Problems solved by technology

There are generally three schemes in the prior art: one is the crank rocker mechanism type, on one side (operating surface) of the wallboard of the offset printing machine, the power drive is the inking gear installed on the inking roller shaft, thereby driving the inking The roller rotates in the circumferential direction, and a crank and rocker mechanism is installed on the other side (transmission surface) of the wallboard of the offset printing machine. The connecting rod drives the string ink roller to move axially through the roller on the swing rod. Adjustable, but the disadvantage is that the structure is complex; the second is the compound type, the outer casing of the ink roller is equipped with a common sleeve, and there is a spiral groove on it, and the ball is installed in the groove, so as to be installed in the outer shell of the ink roller. The fixed bushing on the inner wall of the body is separated, and the balls are attached to the ring groove of the fixed bushing. The fixed bushing is assembled with the shaft of the inking roller through the ball bearing. When the outer shell of the inking roller is driven by power When rotating, the common sleeve does not rotate, and the spiral groove on it forces the outer shell of the ink roller to move axially through the balls. The advantage is that the structure is compact and easy to manufacture and install. The disadvantage is that the amount of momentum cannot be adjusted; Three kinds are cylindrical cam type, as the Chinese utility model patent that application number is CN99223732. There is an intermediate wide gear meshed with the inking gear and a cylindrical cam with a cam groove. A support is installed on the inking roller shaft. A slider is provided on the support to match the cam groove. The middle wide gear drives the inking gear to rotate to realize Circumferential rotation of the inking roller, at the same time, the synchronously rotating cylindrical cam drives the sliding block to reciprocate axially in the cam groove, thereby driving the inking roller to perform axial serial movement. The advantage is that the structure is simple and compact, and the disadvantage is the serial momentum Size is not adjustable

[0003] The above three schemes also have the following deficiencies: since the inking rollers are all driven by the inking gears through the inking roller shafts to rotate synchronously, when the inking rollers move axially in series, the inking gears are made to work through the inking roller shafts. Axial sliding, sliding wear will easily affect the transmission accuracy and life of the ink transmission gear, and its service life is short

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