Eagle Industry Co., Ltd.

Jatco Corporation

Yoshinari Kasagi

Hiroyuki Iwanaga

Hiroyuki Nishinosono

Kenta Furukawa

Hiroyuki Nisinosono

Hiroshi Noguchi

Hironori Dosho

Wataru Matsushima

A solenoid valve in which a plunger is disposed in an accommodation space inside a solenoid unit, includes: a first breathing flow passage extending in a circumferential direction on an outer periphery of a stator to communicate with an outside of the solenoid valve; a second breathing flow passage extending from the first breathing flow passage in an axial direction at a part in the circumferential direction to communicate with a first space formed between the stator, a sleeve, and a spool; and a third breathing flow passage extending in the axial direction on an inner periphery of the stator to allow communication between the first space and a second space.

Solenoid valve

A solenoid valve includes: a valve body; a housing which includes a valve seat and a valve chamber; a movable iron core which moves the valve body; a solenoid coil; a fixed iron core configured for moving the movable iron core by causing a current to flow to the solenoid coil; and a sleeve which is disposed inside the movable iron core, in which the sleeve is attached to the housing in such a manner that an open portion of the sleeve is inserted into an open recess portion of the housing communicating with the valve chamber and a gap between the sleeve and the housing is sealed by a seal member.

The Disclosed is a solenoid valve, in which a rod is moved by a plunger that comes into contact with and separates from a stator by electromagnetic force, causing a valve body that opens and closes a valve to move reciprocally. The valve is configured such that a first space and a second space are formed at respective sides of the plunger in the movement direction thereof, a through-hole is formed in the plunger so as to be concentric with a center axis, the rod is arranged in the first space, and a communication passage is formed between an inner surface of the plunger and an outer surface of the rod and communicates with the first space Sand the second space.

A solenoid valve main body has a space with an annular shape continually formed in a circumferential direction between a sleeve and the stator, a first breathing hole which allows an outside of the solenoid valve main body to communicate with the space and a second breathing hole which allows the space to communicate with the accommodation portion. The first breathing hole and the second breathing hole are positioned such that a clockwise distance and an anticlockwise distance in the circumferential direction from the first breathing hole to the second breathing hole are different from each other.

Solenoid valve device

A solenoid valve has a spool is moved via a rod. A breathing hole penetrates a sleeve in a radial direction and allows an inner space of a housing part to communicate with the outside when at least a circular columnar plunger is in a predetermined region provided on a solenoid case side of the sleeve. A through-hole is formed in an axial direction at the center axis of the circular columnar plunger. The rod is configured such that an opposing groove portion passes through the center of the circular columnar plunger in the radial direction and penetrates both radial sides provided with cutout portions of the rod formed at an opposing end portion facing a circular columnar plunger side and an inner surface of the opposing groove portion formed in a symmetrical arc shape as viewed in the radial direction.

The object of the present invention is to provide a solenoid valve which can be assembled easily and has good production efficiency. A solenoid valve comprising; a valve sleeve () of cylindrical shape having an inner passage () continuing in an axial direction, a spool () arranged in a movable manner in said axial direction at said inner passage of said valve sleeve, a center post () of cylindrical shape having a through hole () connected with said inner passage of said valve sleeve and constituted from a magnetic material, a plunger () constituted from a magnetic material and arranged in a movable manner in said axial direction against said valve sleeve and said center post by placing said center post between said spool in said axial direction, a shaft () constituted from a non-magnetic material comprising an axis part () in which one end is brought into contact with said spool and other end attached to an end face of said plunger and moves in said axial direction inside said through hole of said center post, and a collar part () formed as one body with said axis part and sandwiched between said plunger and said center post when said plunger closely approaches said center post by protruding out in a radial direction from said axial part, and a case part comprising a coil () generating a magnetic force transferring to said center post and housing said plunger and said shaft in inside.

A solenoid valveincluding a valve sleeve, and a solenoid portionwhich is mounted at one end along axial direction of the valve sleeve. A plurality of portstoare formed on the valve sleeve. In at least an outlet portof the plurality of ports, a relation of S1&#x2267;S0 is fulfilled, where S1 is an opening area of valve portion when the spoolmoves in an axial direction to maximally open the valve portion between the outlet portand the internal flow passage, and S0 is the total flow passage cross-sectional area.

Provided is a solenoid valve stable in response performance, whose quickness and damping performance are appropriate. In the solenoid valve, a respiration port for flowing fluid into and out from a space located on one side of a plunger that faces the spool is formed in an end portion of a valve sleeve. Further, a respiration groove, which causes the space on the one side of the plunger and the respiration port to communicate with each other when an end portion of the spool and an end portion of a center post are in contact with each other, is formed on the spool. This configuration makes it possible to discharge, with an appropriate level of flow-channel resistance, fluid placed in the space located on the one side of the plunger.

A solenoid valve wherein a valve sleeve and a solenoid case can easily be formed coaxially and manufacturing costs are reduced. The solenoid valve of the present invention comprises a valve sleeveprovided with a spoolaxially movable in said valve sleeve, a solenoid casemounted to a case mounting grooveformed near an axial rear end of said valve sleeve, and a molded bodymounted inside said solenoid caseand provided with a coilin said molded body, and a case opening portionformed at an axial end of said solenoid caseis engaged with said case mounting groove, and a concave portionis formed at an axial end of said molded bodyand said axial rear end of said valve sleeveis fitted to said concave portion

Provided are a solenoid valve which is configured such that the valve body is not deformed when a retainer is mounted and which can be easily assembled, and a method of manufacturing the solenoid valve. A solenoid valve is provided with a valve body inside which a spool is provided so as to move in an axial direction, a solenoid section which is mounted to one end of the valve body in the axial direction thereof, and a retainer which is mounted to the other end of the valve body in the axial direction thereof. The retainer is fixed by a staking section which is provided to an end of the valve body in the axial direction thereof and staked in the axial direction.

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Tokyo, Japan

Yoshinari Kasagi