Screw engagement type clamp device, clamping system, and fluid pressure actuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Nov 17, 2009
Grant Date -
Aug 14, 2008
app pub date -
Mar 14, 2006
filing date -
Mar 18, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An annular piston (21) is inserted into a cylinder hole (20) of a housing (4) so as to be vertically movable and be prevented from rotating. Into a cylindrical hole (24) of the piston (21), a cylindrical rotating member (25) is inserted while prevented from moving vertically. A ball screw mechanism (28) is provided between the piston (21) and the rotating member (25). On an outer peripheral surface of the rotating member (25), a circulation passage (59) which communicatively connects a start end and a terminal end of a male spiral groove (56) is formed in a recessed manner. Into a guide hole (29) formed in an upper half of the housing (4), an output rod (30) is inserted rotatably and movably vertically. An input portion (41) of the output rod (30) is connected to the rotating member (25) so as to transmit rotation. By driving the piston (21) upward, a bolt (45) provided on an upper end portion of the output rod (30) is engaged with an internal threaded hole (12) of a work (10).
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