Synthesis of the transforming mechanism of the rocking machine
DOI:
https://doi.org/10.26577/JMMCS.2022.v116.i4.05Keywords:
Synthesis, rocking machine, drive, connecting rod, four-link articulated-lever mechanism, converting mechanismAbstract
This article discusses the synthesis of a six-link transforming mechanism of a rocking machine.
First, the problem of synthesizing a four-link articulated-lever mechanism for reproducing a vertical
line was solved. For this purpose, the problem of synthesizing a rectilinear-guiding mechanism of
the Evans type, which is a hinged-lever four-link mechanism with a straight vertical line drawing
point, is considered. The task of synthesis is to implement the constraint equation. The geometric
meaning of the constraint equation is to determine the hinge, the positions of which in the absolute
coordinate system are equidistant from the origin of the OXY coordinate system.
The problem of synthesis is formulated as a problem of quadratic approximation. According to the
found dimensions of the articulated four-link, performing the position analysis, the true positions
of the suspension point of the rod column were determined. After that, the found parameters
were refined using the output criterion directly, that is, the deviation from the given rectilinear
trajectory.
After the synthesis of a straight-line guiding mechanism, a drive kinematic chain was synthesized,
which consists of a crank and a connecting rod.
Thus, a rocking machine drive mechanism was obtained, containing a base, a crank pair connected
to the main hinged four-link mechanism. The technical result is achieved by the fact that a two-link
group is attached to the main four-link mechanism, forming a class III mechanism. The attached
two-drive group is the leading crank connected to the rack and connecting rod.
Based on the obtained dimensions of the six-link converting mechanism, an experimental model
was developed, which fully confirmed the efficiency of the transforming mechanism.
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