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Title:
DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/082187
Kind Code:
A1
Abstract:
A drive device which can be manufactured efficiently and which uses a feed screw is provided. Specifically, in a compound drive device (1), a feed screw (70) of a linear drive mechanism (7) has a first thread part (701) in which a helical groove (706) is provided in equal intervals at a first pitch Pa, and a second thread part (702) in which the helical groove (706) is provided in equal intervals at a second pitch Pb, the helical groove (706) not being formed in a boundary part (703) sandwiched between the first thread part (701) and the second thread part (702). A first carriage (71) has a first engaging part (716a) that engages with the helical groove (706), and a second engaging part (717a) that engages with the helical groove (706) at a position distanced from the first engaging part (716a) in the axial direction. The first engaging part (716a) and the second engaging part (717a) are able to move relative to each other in the axial direction, and are not able to rotate relative to each other about an axis (L4). The first pitch Pa, the second pitch Pb, and the axial-directional dimension L0 of the boundary part (703) satisfy the formula [L0 = Pa = n × Pb], where n is a positive integer.

Inventors:
OGAWA YOSHINORI (JP)
FURUBAYASHI KAZUMI (JP)
Application Number:
JP2016/082923
Publication Date:
May 18, 2017
Filing Date:
November 07, 2016
Export Citation:
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Assignee:
NIDEC SANKYO CORP (JP)
International Classes:
F16H25/20
Domestic Patent References:
WO2007069667A12007-06-21
Foreign References:
JP2012170284A2012-09-06
JPH07257850A1995-10-09
JPS63312562A1988-12-21
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