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US 2015/0027573 A1Published application
Electromagnetic valve
AssigneeDenso Corporation
InventorsMasahiko OCHIAI, Jiro KONDO
Life of this patent
Estimating the term…
Abstract
An oil control valve has a cup shaft and a plunger. The cup shaft and the plunger have a projection and a recess to provide a male-female joint. The male-female joint provides contact points which can reduce lateral offset and inclination. The projection and The recess provides two or more force transmitting points from the plunger to the cup shaft, when the projection and the recess are inclined with each other. The force transmitting points are located about the central axis of the spool in a distributed manner.
Claims13
An electromagnetic valve comprising:
- a spool valve having a sleeve formed in a cylindrical shape extending along a central axis from a base end to a distal end, and a spool supported within a spool bore formed in the sleeve in a reciprocally movable manner;
- a shaft disposed axially next to the spool to come into contact with the base end of the spool;
- and
- an electromagnetic actuator having a stator core formed in a cylindrical shape and fixed on the base end of the sleeve, a cup guide formed in a bottomed cylindrical shape and disposed radial inside of the stator core, a movable core supported in a guide bore formed within the cup guide in a reciprocally movable manner and connected to the spool via the shaft in an integrally movable manner, and a coil excited by current to magnetize the movable core and the stator core, wherein
- the shaft has a first stepped portion formed in a shape to provide a male-female joint, the first stepped portion being formed on a first end portion, which comes in contact with the movable core, and wherein
- the movable core has a second stepped portion formed in a shape to provide the male-female joint with the first stepped portion, the second stepped portion being formed on a second end portion, which comes in contact with the shaft.
3 more elements
Dependencies are inferred from the claim text.