| 摘要 |
<p>A reciprocation drive mechanism converting the rotation of a motor to linear motion to produce reciprocating drive force and a press using the mechanism are provided. The rotation of a first motor (20A), one of two motors (20A, 20B), is converted into high-speed, low-torque rotational output by a first power transmission mechanism (30) and transmitted to a ball-screw mechanism (50). The rotation of the second motor (20B) is converted into low-speed, high-torque rotational output by a second power transmission mechanism (40) and transmitted to the ball-screw mechanism (50). In the ball-screw mechanism (50), a feeder screw (52) is supported in a screw hole of a nut member (51) so as to be rotated by screw feeding. The first power transmission mechanism (30) is connected to the feeder screw (52), and the second power transmission mechanism (40) is connected to the nut member (51). The co-rotation of the feeder screw (52) caused by the rotation of the nut member (51) is prevented by a co-rotation prevention mechanism (80).</p> |
