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公开(公告)号：JP2001028874A
公开(公告)日：2001-01-30
申请号：JP2000178749
申请日：2000-06-14
Applicant: IBM
Inventor： BROWN ROBERT EDWARD , BUNKER CHRISTIAN J , LO JIANN-CHANG
Abstract: PROBLEM TO BE SOLVED: To obtain a linear-actuator with a linear bearing having a preload force at an adjusted level. SOLUTION: The linear-actuator 8 contains a static stator 14 and an external armature 10 moved together with a coil moved in magnetic structure. Linear bearings 16 containing static tracks clamped to the stator 14 and movable tracks clamped to the armature 10 are extended on each side of magnetic structure. Balls are rotated among the static tracks and the movable tracks in each linear bearing 16 together with the movement of the armature 10. In the manufacturing process of the linear-actuator 8, the movable tracks of each linear bearing 16 are installed loosely to the armature 10, a preload force is given to the movable tracks by using an instrument clamping the armature 10, and the movable tracks are clamped at fixed positions so that the preload force w maintained approximately.
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公开(公告)号：JPH10122326A
公开(公告)日：1998-05-15
申请号：JP25814997
申请日：1997-09-24
Applicant: IBM
Inventor： BOYETTE JAMES EDWARD JR , BROWN ROBERT EDWARD
Abstract: PROBLEM TO BE SOLVED: To provide an actuator giving movement in a direction z by a positioning device extended between input/output stages. SOLUTION: A nut 22 rotated on an input stage 12 is provided. This nut 22 is engaged with a screw 24 extended in the nut 22 from an output stage 14. The nut 22 is driven by a motor 40 provided in the input stage 12. A plate 60 mounted in the output stage via a flexible leaf spring 64 is slid in a direction Z with movement of the output stage 14, its rotation is impeded. Lateral direction positioning of the screw is obtained from screw engagement of the screw 24 and the nut 22. The leaf spring 64 is formed so as to give a lateral direction pre-load between the screw 24 and the nut 22.
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公开(公告)号：DE69712849D1
公开(公告)日：2002-07-04
申请号：DE69712849
申请日：1997-08-22
Applicant: IBM
Inventor： BOYETTE JR , BROWN ROBERT EDWARD
Abstract: An actuator providing Z-direction movement within a positioning system extends between an input stage and an output stage. A nut is mounted to rotate on the input stage in threaded engagement with a screw extending into the nut from the output stage. The nut is driven by a motor also mounted on the input stage. A plate attached to the output stage through a flexible leaf spring slides along the input stage in the Z-direction with movement of the output stage, preventing rotation of the output stage about the axis of the screw. Lateral positioning of the screw results from the threaded engagement of the screw and nut. The leaf spring is formed to provide a lateral pre-load force between the screw and nut.
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公开(公告)号：DE69712849T2
公开(公告)日：2003-01-02
申请号：DE69712849
申请日：1997-08-22
Applicant: IBM
Inventor： BOYETTE JR , BROWN ROBERT EDWARD
Abstract: An actuator providing Z-direction movement within a positioning system extends between an input stage and an output stage. A nut is mounted to rotate on the input stage in threaded engagement with a screw extending into the nut from the output stage. The nut is driven by a motor also mounted on the input stage. A plate attached to the output stage through a flexible leaf spring slides along the input stage in the Z-direction with movement of the output stage, preventing rotation of the output stage about the axis of the screw. Lateral positioning of the screw results from the threaded engagement of the screw and nut. The leaf spring is formed to provide a lateral pre-load force between the screw and nut.
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