Lifting structure of engraving machine
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United States of America Patent
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-
Oct 15, 2019
Grant Date -
Feb 14, 2019
app pub date -
Aug 13, 2017
filing date -
Aug 13, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A lifting structure of an engraving machine is provided. A lifting platform of the engraving machine has four pivot holes each provided with a screw seat, and is mounted with a shaft seat having a drive gear. A sprocket is provided under each screw seat. A driven gear is provided under one of the sprockets to mesh with the drive gear. The sprockets of the pivot holes are connected by a chain. The screw seat includes an upper screw sleeve, a lower screw sleeve, an upper thrust bearing, a lower thrust bearing, and a spring. The lower screw sleeve is rotatable in the pivot hole through the upper thrust bearing and the lower thrust bearing. The spring is located between the upper screw sleeve and the lower screw sleeve. Two screws pass through the upper screw seat and are screwed to the lower screw seat, respectively.
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