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Patent Searching and Data


Title:
ELECTRIC VALVE ACTUATOR AND VALVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/216526
Kind Code:
A1
Abstract:
Provided is an electric valve actuator that can open and close a valve with high accuracy with a compact structure. An electric valve actuator 1 is provided with: a motor 2 that receives a supply of electric power and generates a rotary driving force; a ball screw device 3; a valve shaft 4; and a motion conversion mechanism 5 that converts linear motion of a nut member 32 of the ball screw device 3 into rotational motion of the valve shaft 4. In this electric valve actuator 1, a screw shaft 31 of the ball screw device 3 is rotatably supported by a pair of bearings 33, 34, and the valve shaft 4 is disposed between the bearings 33, 34.

Inventors:
MATSUTO TAKUSHI (JP)
YAMASHITA YOUHEI (JP)
Application Number:
JP2018/018537
Publication Date:
November 29, 2018
Filing Date:
May 14, 2018
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16K31/44; F02M26/67; F16K31/04; F16H21/16; F16H25/22; H02K7/06
Foreign References:
JP2521278B21996-08-07
JP2017009032A2017-01-12
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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