Damping structure
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United States of America Patent
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Aug 25, 2015
Grant Date -
Oct 24, 2013
app pub date -
Jan 13, 2012
filing date -
Jan 14, 2011
priority date (Note) -
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Abstract
A damping mechanism has a housing body defining a cavity with a central axis, a threaded section disposed with female threads revolving about the central axis and a smooth section; a rotating shaft inserted into the cavity; and a piston, wherein the piston comprises a threaded section disposed with male threads revolving about the central axis and a piston head. The threaded section of the cavity and the threaded section of the piston constitute a screw-on fit relationship between the female and male threads. The piston head is clearance-fitted or seal-fitted with the smooth section of the cavity. An axial hole section of the piston is clearance-fitted or seal-fitted with the rotating shaft. The rotating shaft is provided with a radially outwardly-opening and axially-extending oiling slot on the sliding path of the piston head while the depth and/or width of the oiling slot changes gradually.
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