Solenoid valve with armature guide

摘要

A coil (96) attracting an armature (80) is housed in a main body part (70). A valve part (82) adapted to rest on and move off a valve seat (74) is formed integral with the armature (80). The valve seat (74) is disposed at a location between a high-pressure path (78) and a low-pressure path (83). When the valve part (82) rests on the valve seat (74), the high-pressure path (78) and the low-pressure path (83) are disconnected from each other, while, when the valve part (82) moves off the valve seat (74), the high-pressure path (78) and the low-pressure path (83) communicate with each other. A through-hole (86) is formed in a portion of the armature (80) through which a smaller amount of magnetic flux from the coil (96) passes. A guide pin (102) secured to the main body part (70) engages with the through-hole (86).

主权项

1. A solenoid valve comprising:
a main body part; a coil housed in said main body part; an armature adapted to be attracted by said coil; a valve part formed integral with said armature; and a valve seat which said valve part is adapted to rest on and move off; said valve seat being disposed between a high-pressure path and a low-pressure path; said valve part, when resting on said valve seat, disconnecting said high-pressure path and said low-pressure path from each other, said valve part, when moving off said valve seat, making said high-pressure path and said low-pressure path communicate with each other; said solenoid valve further comprising: a guided portion for said armature formed in a portion of said armature through which a smaller amount of magnetic flux from said coil passes; and a guide secured to said main body part, said guide engaging with said guided portion, said guide supporting said armature in such a manner that said armature is movable between the rest position and the off-position:
wherein said armature comprises a magnetic portion made of a magnetic material and disposed at a location where the density of the magnetic flux generated by said coil is high, and a high-strength portion made of a high-strength material having a relatively high strength and disposed at a location where the density of the magnetic flux generated by said coil is low, said magnetic portion and said high-strength portion being secured to each other; andsaid guided portion of said armature is formed in the shape of a through-hole in said high-strength portion.