| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller screw device reducing dynamic friction torque by suppressing the axial sliding of a rolling body. SOLUTION: The rolling body 33 formed into a conical roller shape is disposed between a screw shaft 31 and a nut 32 so that a vector inner product between rolling body axial components PS and PN' of contact loading PS and PN applying to the circumferential part 33c of the rolling body 33, and sliding frictional forces F1 and F2 produced between the circumferential part 33c of the rolling body 33 and the groove surfaces of track grooves 36 and 37 becomes a negative value. COPYRIGHT: (C)2004,JPO
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