초록 ▼

An electromagnetic valve unit wherein a solenoid coil is assembled within a motor housing in surrounding relationship with a stationary core, a yoke member is fitted at its outer periphery to the corresponding fitting faces of the motor housing and a valve housing, a spring-loaded shaft is slidably

An electromagnetic valve unit wherein a solenoid coil is assembled within a motor housing in surrounding relationship with a stationary core, a yoke member is fitted at its outer periphery to the corresponding fitting faces of the motor housing and a valve housing, a spring-loaded shaft is slidably supported by a pair of bearings in the stationary core and the yoke member for axial movement, and a movable core is fixed to the shaft to be moved between the stationary core and the yoke member. In such arrangement, a sleeve member of non-magnetic material is coupled over the stationary core and a stepped portion of the yoke member for alignment of the spaced bearings, and the yoke member has an annular shoulder coupled within the valve housing for alignment of the shaft in relation to a valve seat member which is assembled within the valve housing to cooperate with a valve element on the shaft.

대표청구항 ▼

An electromagnetic valve unit including a flow control valve assembly for controlling the flow of fluid passing therethrough and operatively associated with an electromagnetic motor assembly for actuating said valve assembly in response to an electric current applied thereto from an electric control

An electromagnetic valve unit including a flow control valve assembly for controlling the flow of fluid passing therethrough and operatively associated with an electromagnetic motor assembly for actuating said valve assembly in response to an electric current applied thereto from an electric control circuit, said motor assembly comprising: a motor housing of magnetic material providing at one end thereof with a fitting face; a solenoid coil concentrically assembled within said motor housing and connected to said electric control circuit; a stationary core of magnetic material surrounded by said solenoid coil; a yoke member of magnetic material fitted at its outer periphery to the fitting face of said motor housing and having a stepped portion arranged to be coaxial with said stationary core; a shaft of non-magnetic material extending through the axes of said stationary core and said yoke member into said valve assembly; first and second bearing means for axially slidably supporting said shaft, respectively, from said stationary core and said yoke member; a movable core of magnetic material fixed to said shaft to be axially moved between said stationary core and said yoke member, said stationary core and said movable core having first and second confronting end faces; a sleeve member of non-magnetic material surrounded by said solenoid coil and having positioned therewithin said stationary core and the stepped portion of said yoke member for alignment of said first and second bearing means; resilient means for loading said shaft toward said valve assembly; said valve assembly comprising: a valve housing secured to said motor housing through the outer periphery of said yoke member and being provided with first and second ports; a valve seat member assembled within said valve housing to subdivide the interior of said valve housing into first and second chambers, respectively, in open communication with said first and second ports, said valve seat member being in surrounding relationship with said shaft; and a valve element fixed to said shaft to cooperate with said valve seat member to control the flow of fluid between said first and second chambers in response to axial movement of said shaft wherein said valve assembly further comprises bellows means interposed in a fluid-tight manner between said yoke member and said shaft for preventing the flow of fluid from the interior of said valve housing into said motor assembly.