Biaxial rotary drive unit
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United States of America Patent
Stats
-
Oct 6, 1992
Grant Date -
N/A
app pub date -
Dec 19, 1990
filing date -
Dec 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A biaxial rotary drive unit drives an antenna Ant on a vehicle for rotation in both azimuthal and elevational directions. A first axis Y represents a vertical axis, and an azimuth turntable 120 is rotatable about the first axis. The second axis X represents a horizontal axis, and the antenna Ant is mounted on the turntable so as to be rotatable about the second axis in the elevational direction. The turntable 120 represents a gear of an increased diameter, which is meshed by a gear 144 of a reduced diameter to be driven thereby for rotation. A cylindrical shaft 116 extends through the center of the larger diameter gear 120. The cylindrical shaft 116 carries a ring gear meshing with a pinion gear 154, which serves driving the cylindrical shaft 116 up and down. The vertical movement of the cylindrical shaft 116 is transmitted through a link 115 to drive the antenna Ant for rotation in the elevational direction. The cylindrical shaft 116 is formed with a flute 116r extending parallel to the first axis Y and in which a rib 120r on the azimuth turntable 120 is fitted, whereby the cylindrical shaft 116 and the link 115 rotates with the azimuth turntable 120.
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