Cam driving mechanism and offset printing machine with same

Abstract

The invention discloses a cam driving mechanism, which belongs to the field of offset printing machines. The cam driving mechanism includes a wheel shaft, including a main section, an assembly section, and a thread section; a first cam is provided with a first assembly through hole, and the first cam passes through the first assembly The through hole is sleeved on the assembly section; the expansion taper sleeve is sleeved on the assembly section and / or the threaded section, and the expansion taper sleeve gradually becomes smaller from the end far away from the first cam to the end close to the first cam, and is tightened The end of the taper sleeve close to the first cam extends into the gap formed between the first assembly through hole and the assembly section; the locking screw sleeve is threadedly matched with the threaded section, and the expansion taper sleeve is located between the locking screw sleeve and the first cam between. The cam drive mechanism disclosed in the present invention can realize the convenience of disassembly and assembly between the cam and the wheel shaft, and at the same time ensure the stability of the assembly between the cam and the wheel shaft, so that the rotation between the cam and the wheel shaft is completely synchronized, and the cam can be replaced after many times. Ensure 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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