Title:
LINEAR ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2022/154043
Kind Code:
A1
Abstract:
In the present invention, in order to prevent the occurrence of a lock state when a linear screw element of a linear actuator has moved fully backward, a screw mechanism that converts the rotational force of a first screw element (1) into thrust in the axial direction of a second screw element (2) and a driving mechanism (3) that imparts rotational force to the first screw element (1) are supported by a case (4). The second screw element (2) stops rotating with respect to the case (4). The friction coefficient of a site that resists the rotation of the first screw element (1) is reduced by interposing a backward movement stopper (7), which comprises a thrust needle bearing, between a front end surface (1c) of the first screw element (1) and a rear end surface (2d) of the second screw element (2), which has moved fully backward relative to the case (4) by means of thrust in the rearward direction.
Inventors:
SAITO TAKAHIDE (JP)
ISHIKAWA SHINTAROU (JP)
ISHIKAWA SHINTAROU (JP)
Application Number:
PCT/JP2022/000886
Publication Date:
July 21, 2022
Filing Date:
January 13, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H25/20; F16H25/24
Domestic Patent References:
| WO2017150150A1 | 2017-09-08 | |||
| WO2020179477A1 | 2020-09-10 |
Foreign References:
| CN104595446A | 2015-05-06 | |||
| JP2002176746A | 2002-06-21 |
Attorney, Agent or Firm:
KAMADA Naoya et al. (JP)
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