Fixed-length paper feeding assembly and fixed-length paper feeding method

By using the gear differential device and eccentric differential transmission unit in the inner frame paper fixed-length feeding assembly, the phase error between the paper feeding mechanism and the scoring mechanism is dynamically compensated, solving the problem of inconsistent linear speed in the paper feeding device and realizing precise and uninterrupted cutting of the paper tape scoring.

CN122276249APending Publication Date: 2026-06-26FUJIAN TOBACCO MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUJIAN TOBACCO MACHINERY
Filing Date
2026-04-28
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In the existing cigarette packaging machine, the linear speed of the active and driven paper feeding wheels is inconsistent with the linear speed of the scoring wheel group during the power transmission process. This results in a systematic error in the position of the U-shaped scoring on the paper tape, affecting the paper tape cutting accuracy.

Method used

The paper feed assembly with fixed length of inner frame paper is adopted, including a scoring mechanism, a paper feeding mechanism, a first servo motor, a gear differential device and a color mark detector. The phase error is dynamically compensated by the gear differential device to realize the synchronization of the scoring mechanism and the paper feeding mechanism. The eccentric differential transmission unit and the second servo motor are used for dynamic correction.

Benefits of technology

Without stopping the machine or changing the speed, the phase error is dynamically compensated to ensure that the paper tape markings are accurate and uninterrupted, thus improving the precision and consistency of paper tape cutting.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of cigarette packaging technology, specifically to an inner frame paper fixed-length feeding assembly and a fixed-length feeding method. The feeding assembly includes: a scoring mechanism including a first drive shaft; a feeding mechanism including a second drive shaft; a first servo motor, drivingly engaged with the first drive shaft; and a gear differential device, drivingly engaged between the first and second drive shafts, comprising a drive gear on the first drive shaft, a driven gear on the second drive shaft, and an eccentric differential transmission unit drivingly engaged between the drive gear and the driven gear. This invention forms a gear transmission path of "drive gear - first double gear - transmission gear shaft - second double gear - driven gear". When phase error accumulates, the second servo motor can superimpose compensation angles during the internal meshing rotation of the transmission gear shaft and the second double gear, achieving dynamic compensation and correction of phase difference. This is suitable for processing score lines without obvious discontinuities on paper tape.
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