Cam drive mechanism and offset press with same

Abstract

The invention discloses a cam drive mechanism, and belongs to the field of offset presses. The cam drive mechanism comprises an axle, a first cam, an expanding taper sleeve and a locking screw sleeve.The axle comprises a main section, an assembly section and a thread section. The first cam is provided with a first assembly through hole, and the first cam is arranged on the assembly section through the first assembly through hole in a sleeving manner. The expanding taper sleeve is arranged on the assembly section and / or the thread section in a sleeving manner, the expanding taper sleeve gradually becomes smaller from the end away from the first cam to the end close to the first cam, and the end, close to the first cam, of the expanding taper sleeve stretches into a gap formed between the first assembly through hole and the assembly section. The locking screw sleeve and the thread section are in thread fit, and the expanding taper sleeve is located between the locking screw sleeve and the first cam. According to the cam drive mechanism, the assembly stability between the cam and the axle can be guaranteed while the cam and the axle are conveniently dismounted and mounted, the cam and the axle rotate completely synchronously, and after the cam is replaced multiple times, it is guaranteed that the assembly stability between the cam and the axle is not affected.

Description

technical field [0001] The invention relates to the field of offset printing machines, in particular to a cam driving mechanism and an offset printing machine with the same. Background technique [0002] The offset printing machine is a kind of lithographic printing machine. When printing, the printed image and text are first printed from the printing plate to the rubber cylinder, and then transferred to the paper by the rubber cylinder. Offset printing machines can be divided into sheet-fed offset printing machines and web offset printing machines according to different feeding methods; according to the number of printing colors completed in one pass, they can be divided into single-color, two-color, four-color and multi-color printing machines; The largest paper format can be divided into small offset printing machines, six-fold, four-fold, folio and full-sheet printing machines, and there is also a double-sided printing machine that can print on both sides at the same tim...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing cam drive mechanism, the cam is usually welded on the wheel shaft, so that the cam and the wheel shaft cannot be disassembled and adjusted, so that the damaged cam cannot be replaced or the cam of different specifications can be replaced according to different printing requirements. The cam that has appeared is detachably installed on the wheel shaft, usually with a pin structure, that is, the pin is inserted into the hole provided on the cam and the wheel shaft, but because there is a gap between the hole and the pin (if there is a gap between the hole and the pin) If there is an interference fit between the cam and the axle, it is still extremely difficult to disassemble), resulting in a slight deviation of the cam when the axle rotates and cannot be completely synchronized, which seriously affects the printing quality. The holes are all worn out, resulting in an increasing gap between the pin and the socket after use

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