SOLENOID VALVE AND MANUFACTURING METHOD OF THE SAME

摘要

A solenoid valve has a coil spring that biases a spool valve toward a solenoid portion, and an adjuster screw that is positioned to interpose the coil spring between the adjuster screw and the spool valve and that is screwed in an internally threaded portion of a sleeve so that its axial position is adjusted. The sleeve is swaged with a swaging tool etc. from an outer peripheral surface located on the outer peripheral side of the internally threaded portion of the sleeve, whereby the swaged part of the internally threaded portion is plastically deformed to the opposite side from the coil spring. The adjuster screw is thus fixed.

主权项

1. A solenoid valve, comprising:
a solenoid portion having a plunger that moves in an axial direction according to a current supplied to an electro-magnetic coil; a cylindrical sleeve placed coaxially with the plunger and having an internally threaded portion formed on an inner peripheral surface of its end located on an opposite side from the solenoid portion; a spool valve that is accommodated in a valve hole formed in the sleeve and that slides on an inner surface of the sleeve according to the axial movement of the plunger; an elastic member that biases the spool valve toward the solenoid portion; and an adjusting screw that is positioned to interpose the elastic member between the adjusting screw and the spool valve, and that is screwed in the internally threaded portion of the sleeve so that its axial position is adjusted; wherein rotation of the adjusting screw relative to the sleeve is restricted by swaging the sleeve from an outer periphery of the internally threaded portion with a swaging tool, and a part of the internally threaded portion which is swaged with the swaging tool is plastically deformed to an opposite side from the elastic member.