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Title:
ELECTROMAGNETIC VALVE
Document Type and Number:
Japanese Patent JP2014240697
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic valve which enables downsizing and improves foreign matter resistance.SOLUTION: An electromagnetic valve includes: a sleeve 4 having a supply port 41 and an output port 42; a spool valve 30 which is housed in a valve hole formed at the sleeve 4 so as to move in an axial direction and changes a flow passage area between the supply port 41 and the output port 42 through axial movement; a solenoid part which presses the spool valve 30 to the one side in the axial direction; a coil spring 50 which biases the spool valve 30 to the solenoid part side; and a piston member 6 that is housed in a housing part, which is formed at an end part of the coil spring 50 of the spool valve 30 and has a closed bottom hole shape, so as to move along a central axis of the spool valve 30. The electromagnetic valve further includes an introduction hole 320 which introduces a pressure of a working fluid output from the output port 42 into a space between a bottom surface 300b of a housing hole 300 and one end surface 6b of the piston member 6. A recessed part which may house foreign matters is formed on an inner peripheral surface 300a of the housing hole 300.

Inventors:
FUJITA KAORI
TAKANISHI KOICHI
MURAKAMI TOSHIO
ONO SHIGE
Application Number:
JP2013124107A
Publication Date:
December 25, 2014
Filing Date:
June 12, 2013
Export Citation:
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Assignee:
JTEKT CORP
International Classes:
F16K31/06
Domestic Patent References:
JPH01128804U1989-09-01
JPS6012764U1985-01-28
JPS59113580U1984-07-31
JP2006112514A2006-04-27
JPS6455485A1989-03-02
JPS59110966A1984-06-27
JPH0277301U1990-06-13
Attorney, Agent or Firm:
Tadao Hirata
Takashi Nomiyama
Hiroyuki Ito