Beating-up mechanism of non-circular gear planetary gear system

Abstract

The invention discloses a beating-up mechanism of a non-circular gear planetary gear system. A non-circular gear planetary system mechanism is adopted to convert the uniform rotation of a weaving machine spindle into the non-uniform intermittent swinging of a sley. A planet carrier is driven by the weaving machine spindle, and a driving sun gear is movably sleeved on the weaving machine spindle, wherein the driving sun gear is immovable. A planet shaft is driven by the planet carrier, and two non-circular gears are fixedly connected to the planet shaft, wherein one non-circular gear is engaged with the driving sun gear, while the other non-circular gear is engaged with a driven sun gear; the driven sun gear is fixedly connected to an output shaft, i.e. a rocking shaft; and the beating-up sley is fixedly connected to the rocking shaft. Through establishing a two-stage non-circular gear driving mathematical model, a non-circular gear pitch curve is designed according to an output rotation angle rule of a given rocking shaft so as to realize the full dwell time of the sley at a back center position of 240 DEG C. The beating-up mechanism has short drive chain and compact structure and completely meets the beating-up technological requirement of the weaving machine.

Description

technical field [0001] The invention relates to a weft beating mechanism of a loom, in particular to a non-circular gear planetary gear train beating mechanism. Background technique [0002] The function of the weft beating mechanism is to convert the uniform rotational motion of the main shaft of the loom into the non-uniform swing of the sley. It is required that the sley should have a pause time or "approximate pause" time at the back center position so that there is sufficient time for the weft insertion mechanism to Complete the weft insertion action. At present, the weft beating mechanisms of looms sold in the domestic market mainly include: conjugate cam beating mechanism, this type of mechanism can easily meet the motion law required for weft beating, and can achieve a complete pause time of about 240°, but the cam profile The processing accuracy is quite high, and if there is an error, there will be an impact; the four-link beating-up mechanism, if a beating displa...

AI Technical Summary

Problems solved by technology

At present, the weft beating mechanisms of looms sold in the domestic market mainly include: conjugate cam beating mechanism, this type of mechanism can easily meet the motion law required for weft beating, and can achieve a complete pause time of about 240°, but the cam profile The processing accuracy is quite high, and if there is an error, there will be an impact; the four-link beating-up mechanism, if a beating displacement of about 5mm is allowed, can achieve an "approximate pause" time of about 65°, and its performance is worse than that of the conjugate cam beating-up mechanism , can only be used for the integral sley; if the six-link beating-up mechanism is allowed to have a beating displacement of about 5mm, it can achieve an "approximate pause" time of about 120°, and its performance is better than that of the four-link beating-up mechanism. It can only be used for the integral sley. In addition, the mechanism has more hinge points and the cumulative error is large, so the machining accuracy is required to be greater than that of the four-link beating-up mechanism.

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