ELECTROMAGNETIC VALVE

摘要

In an electromagnetic valve in which a valve body unit is housed in a housing, the unit has a plunger including a groove portion at its cylindrical outer peripheral face. The groove portion extends in the cylinder axis direction and moves in the cylinder axis direction by an electromagnetic force generated by an electromagnetic coil. A rod is secured to the plunger and abuts against a valve seat for opening and closing the valve when the plunger is moved to close the valve and releasing the abutment of the rod against the seat when the plunger is moved to open the valve. A cylindrical sleeve covers the outer peripheral face of the plunger and is configured integrally with the plunger. A communication passage defined by the groove portion of the plunger and the inner peripheral face of the sleeve extends in the cylinder axis direction.

主权项

1. An electromagnetic valve including a valve body unit housed in a housing and an electromagnetic coil, said valve body unit comprising:
a plunger having a groove portion at a cylindrical outer peripheral face of said plunger, said groove portion extending in a cylinder axis direction, said plunger moving in said cylinder axis direction by electromagnetic force generated by said electromagnetic coil; a rod secured to said plunger, said rod abutting against a valve seat for opening and closing said electromagnetic valve when said plunger is moved to close said electromagnetic valve and releasing the abutment of said rod against said valve seat when said plunger is moved to open said electromagnetic valve; a cylindrical sleeve configured to cover said outer peripheral face of said plunger and integrally formed with said plunger; and a communication passage defined by said groove portion of said plunger and an inner peripheral face of said sleeve and extending in said cylinder axis direction.