Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1997-10-17
2000-04-25
Bucci, David A.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
744248A, 74441, 384 45, F16H 2322, F16C 2906
Patent
active
060530626
ABSTRACT:
A linear motion apparatus comprises a linear track rail having a roller running groove; a feeding threaded shaft rotatably arranged in parallel with the track rail; and a movable block arranged on the track rail through rollers, and provided with a nut portion having a threaded bore into which the feeding threaded shaft is to be screwed. The movable block comprises (i) a block body having a roller running counter-groove which faces on the roller running groove of the track rail and a roller returning passage and (ii) direction changing passage forming members respectively provided on both ends of the block body, each of which members forms a U-shaped direction changing passage connecting the roller running counter-groove and the roller returning passage to each other. The movable block is linearly moved on the track rail through the rollers by rotating the feeding threaded shaft. The nut portion is integrally formed on the direction changing passage forming member, and a position of a center axis of the threaded bore of the nut portion is determined by the direction changing passage forming member on a basis of a position of the roller running counter-groove.
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Hirokawa Tadashi
Ishikawa Hirokazu
Shirai Takeki
Bucci David A.
Joyce William C
THK Co. Ltd.
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