Bidirectional self-locking device
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United States of America Patent
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Feb 19, 2013
Grant Date -
Sep 2, 2010
app pub date -
Oct 10, 2008
filing date -
Oct 12, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a bidirectional self-locking device including a housing (10) and a gear shaft (20). A first locking device and a second locking device are disposed in the housing (10). When a first locking cam (30) is driven to rotate in a first direction, protuberances on both sides of the first locking cam (30) are respectively in contact with a first locking element (31) and a second locking element (32), such that the first locking element (31) and the second locking element (32) tend to move radially outward and thus tightly press against an inner wall of the housing (10) so as to form a locking engagement. The second locking device has a similar structure to that of the first locking device. When a second locking cam (40) is rotated in a direction opposite to the first direction, a third locking element (41) and a fourth locking element (42) press against the inner wall of the housing (10) so as to form a locking engagement. The first locking cam (30), the second locking cam (40) and the gear shaft (20) are connected through a central shaft (80). A first spring (50) and a second spring (60) cause the first locking device and the second locking device to rotate synchronically.
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