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1. (WO2018084312) LINEAR DRIVE DEVICE, MOTOR AND LINEAR DRIVE DEVICE PRODUCTION METHOD

Pub. No.:    WO/2018/084312    International Application No.:    PCT/JP2017/040119
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Wed Nov 08 00:59:59 CET 2017
IPC: F16H 25/20
Applicants: NIDEC SANKYO CORPORATION
日本電産サンキョー株式会社
Inventors: OHKAWA Takanori
大川 高徳
HATASAKO Hiroyuki
畑迫 裕之
KASUGA Takafumi
春日 孝文
UEKI Takahisa
植木 貴久
Title: LINEAR DRIVE DEVICE, MOTOR AND LINEAR DRIVE DEVICE PRODUCTION METHOD
Abstract:
In a linear drive device (100), a movable member (6) is driven using a guide shaft (5) supported by a bracket (4) and a lead screw (2). Since a nut mechanism (30), which together with the lead screw (2) configures a feed screw mechanism, is provided with a first spring (35) between two nuts (3), it is possible to limit rattling of the nuts (3) with respect to the lead screw (2). Of the two nuts (3), the first nut (31) provided on the side opposite a motor (1) and a first plate (41) is not able to move relative to the movable member (6) in the axis (L) direction. As a result, when a member to be driven is loaded on the movable member (6) and the movable member (6) is driven in the direction approaching the first plate (41), the first plate (41) and members disposed therearound are not susceptible to interference by the member being driven. Accordingly, the range in which the movable member (6) can move can be made long even when rattling is reduced.