ELECTRIC ACTUATOR - NTN TOYO BEARING CO LTD

Title:

ELECTRIC ACTUATOR

Document Type and Number:

WIPO Patent Application WO/2016/195104

Kind Code:

A1

Abstract:

Provided is an electric actuator for which a reduced weight and a more compact size is achieved by reducing the thickness of a housing, and for which collision of the threaded shaft with the housing is avoided, thereby improving reliability. In this electric actuator a pocket hole 12 for accommodating a threaded shaft 10 is formed in a housing, a cylindrical sleeve 17 is fitted therein in a manner so as to be incapable of rotating, concave grooves 17a extending in the axial direction are formed in the sleeve 17, locking pins 15 are implanted in an end part of the threaded shaft 10 and are engaged in the concave grooves 17a, and the threaded shaft 10 is supported so as to be incapable of rotating with respect to the housing, while being movable in the axial direction. Multiple spiral step-like stepped parts 31, 32, 33 are formed from one end surface of the concave grooves 17a of the sleeve 17, in parallel with the concave grooves 17a and in the direction in which the groove width increases in a stepwise manner. Therefore, when a reverse input is applied from the output side, the threaded shaft 10 rotates, the locking pins 15 are locked in the stepped part 31 and rotation is prevented, resulting in a locked state.

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Inventors:

SHIMIZU TATSUNORI (JP)
KUDOU KANZAN (JP)

Application Number:

PCT/JP2016/066692

Publication Date:

December 08, 2016

Filing Date:

June 03, 2016

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)

International Classes:

F16H25/22; F16H25/20; F16H25/24; H02K7/06; H02K7/116

Foreign References:

JP2014037854A	2014-02-27
JP2014080994A	2014-05-08
JP2007333046A	2007-12-27