SCREW MOTION MECHANISM AND DAMPING APPARATUS USING SAME

WIPO Patent Application WO/2012/086303

A1

Provided is a screw motion mechanism allowing a shaft end of a screw shaft to be joined to a structure simply while preventing rotation of the screw shaft, and capable of preventing damage to a nut member and the screw shaft by preventing the application of excessive torque to the nut member and the screw shaft. The screw motion mechanism comprises: a screw shaft (30) with a spiral screw groove formed on an outer peripheral surface thereof and of which at least one shaft end is joined to a first structure; a nut member (40) rotatably retained with respect to a second structure which is movable with respect to the first structure in a shaft direction of the screw shaft, and threadedly engaged with the screw shaft; and a spherical joint (32) including a spherical portion (33, 61) and a spherical portion receiver member (36, 60) that houses the spherical portion, for joining the shaft end of the screw shaft (30) to the first structure. When axial force acting on the screw shaft (30) is a variable, a rotating torque diagram intersects a sliding torque diagram and, in an initial state where the axial force is not acting on the screw shaft (30), the sliding torque exceeds the rotating torque.

WATANABE YOSHIHITO
KIDA HIDENORI
NAKAMINAMI SHIGEKI
TANAKA HISAYA

PCT/JP2011/074144

June 28, 2012

October 20, 2011

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THK CO LTD (JP)
ASEISMIC DEVICE CO LTD (JP)
WATANABE YOSHIHITO
KIDA HIDENORI
NAKAMINAMI SHIGEKI
TANAKA HISAYA

F16C11/06; F16H25/20; F16C11/10; F16F7/04; F16F9/12; F16F15/02; F16F15/023; F16H25/22; F16H25/24

JP2010261474A	2010-11-18
JP2009168095A	2009-07-30
JP2001200881A	2001-07-27
JPH10184786A	1998-07-14

See also references of EP 2657573A4

IDE Tetsuroh et al. (JP)
Tetsuro Ide (JP)

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