US 6,598,852 B2Granted

Solenoid valve

AssigneeKeihin Corporation

InventorsShinichiro Tomoda, Akira Nagasaki, Masayuki Shibata, Shigeto Ryuen, Noboru Hino

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Abstract

A solenoid valve includes a coil assembly accommodated in a solenoid housing having an end wall at one end thereof. A stationary core is magnetically coupled to the end wall and inserted into one end of a center bore, and a movable core opposed to the stationary core is inserted into the other end of the center bore. A yoke plate opposed to the other end of the coil assembly is coupled to the other end of the solenoid housing, and a collar made of a non-magnetic material adapted to guide the axial movement of the movable core is inserted into the other end of the center bore through a central portion of the yoke plate. A rod operatively connected to the movable core is connected to a valve member accommodated in a valve housing connected to the solenoid housing. In such solenoid valve, in order to facilitate the processing and assembling of the collar, the movable core and the rod and to provide a reduction in cost, the valve housing is provided with a guide for guiding the axial movement of the rod, and one end of the rod is put into coaxial abutment against the other end of the movable core.

Claims29

Dependent claims

A solenoid valve comprising a coil assembly including a bobbin made of a synthetic resin and having a center bore, and a coil wound around said bobbin, said coil assembly being accommodated in a solenoid housing made of a magnetic metal and having an end wall at one end thereof;

a stationary core magnetically coupled to said end wall and inserted into one end of said center bore;
a movable core opposed to said stationary core and inserted into the other end of said center bore;
a yoke plate made of a magnetic metal, which has a through-bore in its central portion and which is opposed to the other end of said coil assembly and coupled to the other end of said solenoid housing;
a collar made of a non-magnetic material adapted to guide the axial movement of said movable core and inserted into the other end of said center bore through said through-bore;
and a valve member which is accommodated in a valve housing connected to said yoke plate and to which a rod operatively connected to said movable core is connected,
wherein said valve housing is provided with a guide portion for guiding the axial movement of said rod, and one end of said rod is put into coaxial abutment against the other end of said movable core.

3 more elements

Dependencies are inferred from the claim text.