| 摘要 |
PROBLEM TO BE SOLVED: To provide a conversion efficiency measuring device for a rotation/linear motion converting mechanism, which precisely measures a conversion efficiency of the rotation/linear motion converting mechanism. SOLUTION: The rotation/linear motion converting mechanism 1 has a bearing which supports a sun shaft while rotating integrally with a nut about the axis of the nut, and converts the rotation of the nut into the linear motion of the sun shaft. The conversion efficiency measuring device for measuring the conversion efficiency of work of the rotation/linear motion converting mechanism 1 includes a load measuring unit 70 for applying a towed load on the sun shaft 10 and measuring a change of the towed load occurring when the sun shaft 10 moves, and a housing 80 for fixing the rotation/linear motion converting mechanism 1. The load measuring unit 70 is provided with a connecting mechanism 73 for inputting the towed load to the sun shaft 10 via a universal joint. The housing 80 is provided with: a hole 82 in which the connecting mechanism 73 is inserted; and an alignment mechanism for aligning the axis of the nut 20 with the axis of the hole 82. COPYRIGHT: (C)2008,JPO&INPIT
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