Electromagnetic valve

Patent metadata

Field	Value
Publication number	US-9903500-B2
Application number	US-201615365099-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Dec 3, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A self-holding electromagnetic valve includes: a solenoid having a tubular guide part having the same center as a central axis extending in an axial direction; a axially movable element located radially inside the guide part; a cover housing the solenoid and the movable element, having a hole portion, and made of a magnetic material; a pin located at the hole portion and movable along with movement of the movable element; and a valve section provided outside the cover and opened/closed along with movement of the movable element and the pin. The solenoid has a cylindrical part with an inner circumferential surface that receives the guide part, tooth parts that extend radially outward from the cylindrical part and are made of a magnetic material, bobbin parts provided each tooth part, and coils wound around the bobbin parts.

First claim

What is claimed is:

1. An electromagnetic valve, comprising:
a solenoid having a tubular guide part having the same center as a central axis extending in an axial direction;
a movable element located inside the guide part in a radial direction and configured to move in the axial direction;
a cover configured to house the solenoid and the movable element, having a hole portion, and made of a magnetic material;
a pin located at the hole portion and configured to move along with movement of the movable element; and
a valve section provided outside the cover and opened/closed along with movement of the movable element and the pin,
wherein the movable element has a permanent magnet having magnetic poles different from each other in the axial direction, and a pair of yokes disposed at opposite sides of the permanent magnet in the axial direction,
the solenoid has a cylindrical part in which the guide part is provided for an inner circumferential surface thereof, a plurality of tooth parts that extend outward from the cylindrical part in the radial direction and are made of a magnetic material, bobbin parts provided for the respective tooth parts, and coils wound around the bobbin parts, and
each of the bobbin parts has a flange part bent along an outer circumferential surface of the cylindrical part in an arcuate shape.

2. The electromagnetic valve according to claim 1 , wherein:
the cover has a tubular part that covers the solenoid from an outside in the radial direction; and
the flange parts are bent along an inner surface of the tubular part in an arcuate shape.

3. The electromagnetic valve according to claim 1 , wherein the solenoid has three or more coils disposed at regular intervals in a circumferential direction of the cylindrical part.

4. The electromagnetic valve according to claim 1 , wherein the tooth parts pass through the flange parts to come into contact with the cover.

5. The electromagnetic valve according to claim 1 , wherein inner ends of the tooth parts in the radial direction are connected in a circumferential direction.

6. The electromagnetic valve according to claim 1 , wherein the movable element, the inner and outer circumferential surfaces of the cylindrical part, and the flange parts, are disposed in a concentric shape when viewed in the axial direction.

7. The electromagnetic valve according to claim 1 , wherein the flange parts have shapes rounded with no angle when viewed in directions in which the tooth parts extend.

8. The electromagnetic valve according to claim 1 , wherein the cover has a pair of plates located at respective ends of the solenoid in the axial direction.

Assignees

• Honda Motor Co Ltd
• Nidec Tosok Corp

Inventors

• Fujita Akira
• Ue Hiroaki
• Kai Fumio
• Yasuda Tomohiro

Classifications

• F16K31/0679

  with more than one energising coil · CPC title

• F16K31/06 Primary

  using a magnet {, e.g. diaphragm valves, cutting off by means of a liquid} · CPC title

• H01F2007/086

  Structural details of the armature · CPC title

• H01F7/081

  Magnetic constructions · CPC title

• H01F7/1646

  Armatures or stationary parts of magnetic circuit having permanent magnet · CPC title