Eagle Industry Co., Ltd.

Kabushiki Kaisha Toyota Jidoshokki

Jatco Corporation

Hiroyuki Iwanaga

Yoshinari Kasagi

Kenta Furukawa

Naoki Nishimura

Hiroshi Noguchi

Tadanobu Kawato

Masaki Hoshi

Hiroyuki Nishinosono

Fuminobu Enokijima

Akitaka Matsuzaki

Wataru Matsushima

Hironori Dosho

A solenoid valve includes: a valve body; a sleeve which the valve body is accommodated; a solenoid casing connected to the sleeve on a first end side in an axial direction of the solenoid valve, and is closed on a second end side opposed to the first end side in the axial direction; a solenoid molded body in the solenoid casing; a yoke including a tubular portion inside the solenoid molded body, a flange portion projecting radially outward from an end portion of the tubular portion on the second end side; a movable iron core, which moves in the axial direction inside the yoke. The valve body is moved with the iron core by energizing a coil of the solenoid molded body, and the flange portion has an annular outer peripheral surface that is continuous, and is disposed on the second end side of the solenoid molded body.

Solenoid valve

A solenoid valve includes: a movable iron core; a solenoid molded body disposed outside the movable iron core in a radial direction and including a coil; a solenoid casing accommodating the movable iron core and the solenoid molded body; a fixed iron core disposed inside the solenoid molded body in the radial direction to generate a magnetic force between the fixed iron core and the movable iron core when the coil is energized; and a valve unit that opens and closes a flow passage in accordance with a movement of the movable iron core. A magnetic material separate from the solenoid casing is disposed at an axial end portion of the coil outside the solenoid casing.

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.

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 switching valve device for switching an intermediate flow path through which a fluid flows from an inlet to an outlet includes: a first valve which switches a flow path extending from the inlet to one of two flow paths; and a second valve which is provided on a downstream side of the first valve and switches the intermediate flow path by a differential pressure generated by depressurization in an external flow path Lout connected to the intermediate flow path connected to one of the two flow paths.

Switching valve device

A solenoid valve includes a sleeve configured such that a spool is movably arranged in the axial direction in the sleeve, a stationary iron core, a movable iron core, and a solenoid unit fixed to one end of the sleeve in the axial direction and configured to move the spool in the axial direction in accordance with movement of the movable iron core. The sleeve has a groove provided at the outer periphery thereof on a side of the solenoid unit and a through hole communicating with the groove and the inside of the sleeve. An attachment portion adjacent to the groove in the axial direction is provided at one end of the sleeve in the axial direction. A recess portion having a larger axial dimension than that of the attachment portion is provided at the stationary iron core.

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.

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.

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Tokyo, Japan

Hiroyuki Iwanaga