| 摘要 |
<p>Conventional linear motors had issues in that play and fluctuation were brought about between a bearing and a shaft member for the amount of a minute gap between the bearing and the shaft member, and in that, as a result thereof, precision deteriorated in the positioning of the front-tip section of the shaft that transmits thrust force to a machine. In order to attain a linear motor that can solve these issues, that can get rid of the play and fluctuation between the bearing and the shaft member, and that can enhance positioning precision of a movable section, the linear motor was made to have an anchored section (1) and a movable section (2). The movable section (2) is provided with: permanent magnets (21); and a sliding member (32) that comprises magnetic material, that is arranged at one front-tip section of the permanent magnets (21), and that slides within the anchored section (1) in the axis direction. The anchored section (1) is provided with: a plain bearing (31) that is made to come in contact with the inner face of the anchored section (1), and that supports the sliding member (32) in slidable state; and a coil (11) that is formed within the anchored section (1), and within the inner space of which the movable section (2) moves relative thereto. The sliding member (32) has the center axis thereof arranged to be eccentric to the plain bearing (31) side with respect to the center axis of the cross section of the inner space formed by the coil (11), and is made to come in contact with the plain bearing (31).</p> |
