Motor-operated valve

Patent metadata

Field	Value
Publication number	US-10267434-B2
Application number	US-201615510767-A
Country	US
Kind code	B2
Filing date	Aug 4, 2016
Priority date	Aug 4, 2016
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A motor-operated valve includes a motor, a linear-motion shaft which receives power of the motor and is linearly moved and which includes a valve member that opens and closes a valve port formed at an end of a valve body, and an elastic member which is provided in the valve body and which contacts with an outer circumferential surface of the linear-motion shaft and regulates the lateral movement of the linear-motion shaft.

First claim

The invention claimed is:

1. A motor-operated valve comprising:
a motor;
a linear-motion shaft which receives power of the motor and is linearly moved and which includes a valve member that opens and closes a valve port formed at an end of a valve body; and
an elastic member which is provided in the valve body and which contacts with an outer circumferential surface of the linear-motion shaft and regulates a movement of the linear-motion shaft in a radial direction
a noncircular shaft portion which is provided in the linear-motion shaft, which is loosely fitted to a noncircular hole formed in the valve body so as to prevent the linear-motion shaft from being rotated and whose cross section is noncircular; and
a receiving cylindrical member which is provided in the valve body, which includes the noncircular hole and which receives the linear-motion shaft, wherein
the receiving cylindrical member includes a cylindrical main body portion which has the noncircular hole on one end side and a linear-motion bearing which is attached to the other end side of the cylindrical main body portion, and
the elastic member is formed of a sheet in a shape of an annular ring, and an outer edge portion thereof is sandwiched between the cylindrical main body portion and the linear-motion bearing.

2. The motor-operated valve according to claim 1 , comprising:
a protrusion wall which is protruded from an outer circumferential edge of the other end side of the cylindrical main body portion and which non-rotatably holds the linear-motion bearing therewithin.

3. The motor-operated valve according to claim 1 , comprising:
a rotor of the motor which is rotated with respect to the valve body in a state where the rotor is positioned in a direction of a rotation axis and which is screwed into the linear-motion shaft;
and
a circular shaft portion which is provided in the linear-motion shaft and whose cross section is circular,
wherein the linear-motion shaft is linearly moved only in a range in which the elastic member contacts with the circular shaft portion.

4. The motor-operated valve according to claim 3 ,
wherein the noncircular shaft portion and the circular shaft portion are arranged so as to be aligned between the valve member and a screw portion screwed into the rotor in the linear-motion shaft,
the receiving cylindrical member is arranged between the valve port and the rotor in the valve body, and
the elastic member is attached to the receiving cylindrical member.

Assignees

• Taiheiyo Kogyo Kk

Inventors

• MITSU Terumasa
• Takami Osamu

Classifications

• F25B2500/13

  Vibrations · CPC title

• F16K31/508

  the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element · CPC title

• F16K47/00

  Means in valves for absorbing fluid energy (for pipes F16L55/00) · CPC title

• F16K1/123

  with stationary valve member and moving sleeve · CPC title

• F16K47/04 Primary

  for decreasing pressure {or noise level}, the throttle being incorporated in the closure member · CPC title