WO2019017251A1

WO2019017251A1 - Solenoid valve

Info

Publication number: WO2019017251A1
Application number: PCT/JP2018/026132
Authority: WO
Inventors: 直己西村; 清水　聡; 惟寛川戸
Original assignee: イーグル工業株式会社
Priority date: 2017-07-19
Filing date: 2018-07-11
Publication date: 2019-01-24
Also published as: JPWO2019017251A1; JP7068306B2

Abstract

Provided is a solenoid valve that can stably perform hydraulic control. An immersion solenoid valve 1 comprises: a spool 22; a sleeve 21 inside of which the spool 22 is disposed so as to be able to move in the axial direction; a movable iron core 4 that is disposed at one end of the spool 22 and causes the spool 22 to move; a solenoid molded body 31 that is disposed to the outer periphery of the movable iron core 4; a solenoid case 30 that accommodates the movable iron core 4 and the solenoid molded body 31; and a cylindrical body 32 that accommodates the movable iron core 4 inside an inner space S2. The solenoid valve 1 is horizontally attached to an attachment member. The cylindrical body 32 is provided with a weir 37 at a leading end 32h on the side opposite the spool 22 of the iron core 4.

Description

Solenoid valve

The present invention relates to a solenoid valve, and more particularly to an immersion type solenoid valve used for fluid pressure control of a fluid pressure circuit.

As a conventional solenoid valve for hydraulic pressure (hydraulic pressure) control, there is a valve portion having a spool housed in a sleeve, a plunger (movable iron core) for driving the spool in the axial direction, and a solenoid molded body in which a coil is covered with resin. And a solenoid unit having a solenoid case for accommodating the control oil, which is disposed between the pressure source and the load side of the pump or accumulator, and controls oil whose pressure or flow rate is adjusted by driving the spool to the load side It can be supplied.

By the way, since the drive stroke of the spool is relatively large, when the solenoid unit is driven, the hydraulic oil in the internal space of the housing member for housing the plunger may become a resistance to hinder the rapid movement of the plunger. Therefore, in the conventional oil immersion type solenoid valve, an opening (hereinafter, also referred to as a breathing hole) communicating with the outside is provided, and the internal space of the accommodating member is communicated with the opening, and the operating oil in the accommodating member There is a need to discharge the hydraulic fluid in the moving direction of the plunger to cope with the resistance by the hydraulic fluid by breathing the air from the outside.

The oil immersion type solenoid valve disclosed in Patent Document 1 mainly includes a spool valve portion (valve portion) and a solenoid portion, and the solenoid portion has a plunger having a communication hole penetrating in the axial direction, A cylindrical stator core (housing member) for housing a plunger, a solenoid molded body provided on the outer periphery of the stator core and having a coil, and a yoke (solenoid case) for housing the stator core and the solenoid molded body to form a magnetic circuit doing. The yoke has a two-step stepped tubular structure including a yoke cylindrical portion for housing a solenoid molded body and a ring core cylindrical portion to which the stator core is fitted on the rear side of the yoke cylindrical portion. The bottom portion of the ring is provided with a circular recess, and the inner wall of the ring core cylindrical portion is formed with at least one internal breathing path extending radially so as to communicate with the recess provided in the bottom. Further, on the inner wall of the yoke cylindrical portion, an external respiratory path having a breathing hole which is continuous with the internal breathing path of the ring core cylindrical portion and opened to the outside of the yoke is formed. According to this, the space formed before and after the plunger housed in the cylindrical stator core is in breathable communication with the outside through the communication hole of the plunger, the internal breathing path and the external breathing path, and Hydraulic control can be performed accurately and quickly by causing the hydraulic fluid to breathe outside the yoke in accordance with the movement of the plunger inside.

Japanese Patent Laid-Open No. 2007-154947 (page 4, FIG. 1)

However, in the solenoid valve of Patent Document 1, when mounted in the horizontal direction with respect to the hydraulic control unit (attachment member), the oil level of the hydraulic oil in the hydraulic control unit drops or the oil level is temporarily inclined. As a result, the hydraulic oil is discharged from the rear side (the ring core cylindrical portion side) of the stator core, the oil level of the hydraulic oil in the stator core is lowered, and the operability of the plunger is deteriorated to make the hydraulic control unstable. There was a fear.

The present invention has been made in view of such problems, and an object of the present invention is to provide a solenoid valve capable of stably performing hydraulic pressure control.

In order to solve the above-mentioned subject, the solenoid valve of the present invention,
With the spool,
A sleeve in which the spool is axially movably disposed;
A movable core disposed at one end of the spool and moving the spool;
A solenoid molded body disposed on the outer periphery of the movable core;
A solenoid case for accommodating the movable core and the solenoid molded body;
And a cylinder for accommodating the movable iron core in the inner space,
An immersion type solenoid valve horizontally mounted on a mounting member, comprising:
The cylindrical body is characterized in that a weir is provided at the end opposite to the spool of the movable iron core.
According to this feature, by providing a weir at the end opposite to the spool of the movable iron core in the cylinder, the movable iron core is obtained even when the liquid level in the mounting member is lowered or the liquid level is temporarily inclined. Since it is possible to block the fluid inside the cylinder by the weir provided on the opposite side to the spool of the cylinder, the deterioration of the liquid level inside the cylinder is suppressed to prevent the deterioration of the operation of the movable iron core, and the hydraulic pressure control Can be done stably.

A spacer may be provided between the crucible and the movable core to axially separate the crucible and the movable core.
According to this, the space between the weir provided on the opposite side to the movable iron core spool and the movable iron core is axially separated by the spacer, so that the inside of the cylinder and the opposite side of the movable iron core spool Since the space can be formed between the two, it is possible to leave the fluid on the opposite side of the movable iron spool in the interior of the cylinder when moving to the opposite side of the movable iron spool.

The crucible may be a holder detachably attached to the opening of the cylinder.
According to this, since the weir is a holder detachably attached to the opening of the cylinder, the maintainability of the inside of the cylinder can be enhanced.

The holder may be characterized in that a fluid passage communicating with the outside of the cylinder is provided at the upper part of the surface facing the cylinder.
According to this, since the holder is provided with the fluid passage communicating with the outside of the cylinder at the upper part of the surface facing the cylinder, the liquid level in the mounting member is lowered, or the liquid surface is temporarily inclined. Also, the fluid does not easily flow out of the fluid passage of the holder, and the holder can block the fluid inside the cylinder.

The movable iron core may be characterized in that a through hole penetrating in the axial direction is provided on the upper side of the radial center.
According to this, by providing the through hole extending in the axial direction on the upper side with respect to the radial center of the movable iron core, even when the liquid level in the mounting member is lowered or the liquid level is temporarily inclined, Since the amount of fluid flowing through the through hole of the movable iron core can be suppressed inside the cylinder, it is possible to suppress a drop in the liquid level inside the cylinder.

It is good also as having a positioning means which positions the above-mentioned holder and the above-mentioned cylinder in the peripheral direction.
According to this, since the holder and the cylindrical body can be positioned and attached in the circumferential direction so that the fluid passage of the holder is disposed at the upper portion by the positioning means, the fluid inside the cylindrical body can be reliably made by the holder. You can stop it.

The sleeve is attached to the cylindrical body, and a rod is disposed in the cylindrical body between the movable iron core and one end side of the spool.
The rod may be movable inside the cylinder.
According to this, in the inside of the cylinder to which the sleeve is attached, the rod is disposed between the movable core and one end side of the spool, and the spool side of the movable core becomes a space in which the movement of the fluid is suppressed. The fluid on the spool side of the movable iron core in the interior of the cylinder is blocked, and the drop in liquid level in the interior of the cylinder can be suppressed.

It is a partially cutaway cross-sectional view which shows the OFF state of the solenoid valve in Example 1 of this invention. FIG. 2 is a perspective view showing a structure of a stator in a first embodiment. 5 is a perspective view showing the structure of a holder in Embodiment 1. FIG. It is a partially cutaway cross-sectional view showing the on state of the solenoid valve in which the plunger moves to the annular step side of the stator by energization of the coil. It is a partially cutaway sectional view showing the off state of the solenoid valve in the state where the oil level in the valve housing is lowered. It is a partially cutaway cross-sectional view showing the on state of the solenoid valve in a state where the oil level in the valve housing is lowered. It is a partially cutaway cross-sectional view which shows the OFF state of the solenoid valve in Example 2 of this invention. (A) is a perspective view which shows the structure of the holder in Example 2, (b) is a side view similarly.

EMBODIMENT OF THE INVENTION The form for implementing the solenoid valve which concerns on this invention is demonstrated below based on an Example.

The solenoid valve according to the first embodiment will be described with reference to FIGS. 1 to 6. Hereinafter, the left side of the drawing of FIG. 1 will be described as the upper side of the solenoid valve, and the right side of the drawing of FIG. 1 will be described as the lower side of the solenoid valve.

The solenoid valve 1 is a spool type solenoid valve, and is used, for example, in a hydraulically controlled device such as an automatic transmission of a vehicle. The solenoid valve 1 is a so-called oil immersion type (immersion type) solenoid valve which is horizontally mounted on a mounting member such as a valve housing (not shown) and immersed in hydraulic oil L (liquid) in the valve housing. Used as FIG. 1 shows a state in which the oil level L1 is maintained at a predetermined height position where the hydraulic oil L in the valve housing immerses the entire solenoid valve 1, and the meshed portion inside the solenoid valve 1 is , And the hydraulic oil L.

As shown in FIG. 1, the solenoid valve 1 is configured such that a valve unit 2 that adjusts the flow rate of fluid as a valve is integrally attached to the solenoid unit 3 as an electromagnetic drive unit. FIG. 1 shows the off state of the solenoid valve 1 in which the coil 34 of the solenoid molded body 31 is not energized.

As shown in FIG. 1, the valve unit 2 includes a sleeve 21 provided with an opening such as an input port and an output port (not shown) connected to a flow passage provided in a valve housing (not shown) on the outer periphery; A spool 22 having a plurality of lands (not shown) received in a fluid-tight manner through the through holes 21a, a coiled spring (not shown) for urging the spool 22 axially to the left, and a retainer 23 for holding the spring. It is done. Since this configuration is a configuration well known as a spool valve, detailed description will be omitted. The sleeve 21, the spool 22 and the retainer 23 are made of materials such as aluminum, iron, stainless steel, and resin.

Further, the diameter of the opening 21 b (opening) formed at the axial left end portion of the sleeve 21 is larger than the diameter of the spool 22, whereby the inner peripheral surface of the opening 21 b and the spool in the inside of the sleeve 21 An annular space S <b> 1 is formed between the outer circumferential surface 22 and the outer circumferential surface 22. Further, at the axial left end of the sleeve 21, a breathing hole 21 c (opening) which is a drain port penetrating in the radial direction on the lower side is formed, and the breathing hole 21 c communicates with the space S1.

The solenoid unit 3 includes a cup-shaped solenoid case 30 formed of a magnetic metal material such as iron, a solenoid molded body 31 housed in the solenoid case 30, and a stator 32 disposed inside the solenoid molded body 31. (Tube) and are mainly composed.

The solenoid case 30 is formed to have a diameter smaller than that of the first accommodation cylinder 30b at the center in the radial direction on the left side in the axial direction of the first accommodation cylinder 30b and the inside of the first accommodation cylinder 30b. It is comprised by the flanged cylindrical shape comprised from the 2nd accommodating cylinder part 30c in which the axial direction left end part of the cylinder part 32a of the stator 32 mentioned later is inserted. Further, in the inside of the solenoid case 30, the inner circumferential surfaces of the first housing cylindrical portion 30b and the second housing cylindrical portion 30c and the outer peripheral surfaces of the solenoid molded body 31 and the cylindrical portion 32a of the stator 32 extend in the radial direction. The respiratory path 33 is formed by separating.

The solenoid molded body 31 is formed by molding the coil 34 with the resin 35, and the control voltage is supplied from the connector of the connector portion 35a extending to the outside from the opening 30d provided on the radial direction lower side of the solenoid case 30. It is supplied to the coil 34. The dimension of the opening 30d of the solenoid case 30 in the axial direction is larger than the dimension of the connector 35a of the solenoid molded body 31 in the axial direction, and the gap with the connector 35a inserted into the opening 30d is A breathing path 33 formed inside the solenoid case 30 communicates with the outside via the.

As shown in FIG. 1 and FIG. 2, the stator 32 is formed in a cylindrical shape with a flange, and a cylindrical portion 32 a in which an annular recess 32 b is formed by forming a thin wall substantially in the center in the axial direction; And a through hole 32d capable of receiving the plunger 4 (movable iron core) and the rod 5 at the radial center of the cylindrical portion 32a. A cylindrical protrusion 32k (positioning means) is provided at the left end in the axial direction of the cylindrical portion 32a in the axial direction, and a holder 37 (a weir) is attached to the cylindrical end 32h. The weir of the present invention means a wall having a space above it, and in the present embodiment, the disk-like holder 37 is a weir and the upper space is described by taking the groove 37d as an example. . Furthermore, the details of the structure of the holder 37 will be described later.

The flange portion 32c is provided with a recess 32j which is recessed leftward in the axial direction on the end surface on the right side in the axial direction, and is fixed in a state where the axial left end portion of the sleeve 21 is inserted. Further, the axial direction right end portion of the cylindrical portion 30 a of the solenoid case 30 is crimped to the flange portion 32 c, and the stator 32 and the holder 37 are axially fixed to the solenoid case 30. When the solenoid valve 1 is in the OFF state, the axial left end face 22a of the spool 22 accommodated in the sleeve 21 abuts on the inner diameter side of the recess 32j, whereby the axial leftward movement of the spool 22 is restricted. It is done.

The through hole 32d constituting the space S2 in the stator 32 is formed with a small diameter at the center in the radial direction on the right side in the axial direction of the first accommodation portion 32e where the plunger 4 is disposed on the left side in the axial direction The second housing portion 32 f in which the rod 5 is disposed is configured in a stepped cylindrical shape. An annular surface portion 32g extending in the radial direction is formed on the right side in the axial direction of the first accommodation portion 32e, and the annular surface portion 32g is continuous with the inner surface of the second accommodation portion 32f at the inner diameter side. An annular protection member 36 formed of a rubber-like elastic body for protecting the plunger 4 from an impact when the axial right end surface of the plunger 4 axially moving in the first accommodation portion 32e contacts the annular surface portion 32g. Is attached.

The plunger 4 is formed in a cylindrical shape, and the outer peripheral surface thereof is guided by the inner peripheral surface of the first accommodation portion 32 e so as to be movable in the axial direction. A slight clearance is provided in the radial direction between the outer peripheral surface of the plunger 4 and the inner peripheral surface of the first accommodation portion 32e, so that the plunger 4 can be smoothly moved in the axial direction. . Further, the plunger 4 is provided with a through hole 4a whose center is shifted from the center in the radial direction, and preferably, the through hole 4a which penetrates in the axial direction above the center in the radial direction. Further, the space S2 in the stator 32 is formed such that the space on the axial left side (the holder 37 side) of the plunger 4 and the space on the axial right side (the annular surface portion 32g side) of the plunger 4 are communicated by the through hole 4a. There is.

The rod 5 is disposed substantially coaxially with the plunger 4, that is, on an extension of a radial center, and axially movable inside the second accommodation portion 32f. A slight clearance is provided in the radial direction between the outer peripheral surface of the rod 5 and the inner peripheral surface of the second accommodation portion 32f, so that the rod 5 can be smoothly moved in the axial direction. . The plunger 4 and the rod 5 are integrally movable, and the tip of the rod 5 on the axial right side (valve portion 2 side) is the end face 22 a of the spool 22 on the axial left side (solenoid portion 3 side) In contact with The end on the axial right side of the rod 5 and the end face 22 a of the spool 22 may be fixed.

Next, the structure of the holder 37 will be described. As shown in FIGS. 1 and 3, the holder 37 is formed in a disk shape having substantially the same diameter as the outer diameter of the cylindrical portion 32 a of the stator 32. A cylindrical convex portion 37 b protruding rightward is provided. The convex portion 37 b is formed to have an outer diameter substantially the same as the inner diameter of the through hole 32 d (first accommodation portion 32 e) of the stator 32, and the convex portion 37 b can be inserted into the through hole 32 d of the stator 32. In addition, a cylindrical protrusion 37 c having a diameter smaller than that of the protrusion 37 b and projecting to the right in the axial direction is provided at the radial center of the protrusion 37 b.

The holder 37 is provided with a substantially L-shaped groove portion 37d (fluid passage) extending in the radial direction from the radial upper side of the convex portion 37b to the outer peripheral portion of the end face 37a. A bottomed insertion hole 37e (positioning means) is formed on the outer diameter of the cylindrical projection 32k of the stator 32 described above. According to this, when attaching the holder 37 to the opening end face 32 h of the stator 32, the end face 37 a of the holder 37 and the opening end face 32 h of the stator 32 abut each other, and the projection 32 k of the stator 32 in the insertion hole 37 e of the holder 37 The holder 37 and the stator 32 can be positioned in the circumferential direction such that the groove 37 d of the holder 37 is disposed on the radial upper side by inserting and inserting the connector 37. At this time, since the groove 37 d of the holder 37 is opened radially upward between the opening end surface 32 h of the stator 32, the space S 2 in the stator 32 passes through the groove 37 d of the holder 37. It is in communication with the respiratory pathway 33 formed inside. Alternatively, without providing the insertion hole 37e of the holder 37, the protrusion 32k of the stator 32 may be inserted into the groove 37d of the holder 37 to position the holder 37 and the stator 32 in the circumferential direction.

Next, the operation of the solenoid valve 1 will be described. In the OFF state of the solenoid valve 1 shown in FIG. 1, a magnetic circuit is formed by the solenoid case 30, the stator 32, and the plunger 4 by energizing the coil 34, and a magnetic force is generated between the annular surface portion 32g of the stator 32 and the plunger 4. As a result, as shown in FIG. 4, the plunger 4 can be moved axially to the right toward the annular surface portion 32 g of the stator 32. At this time, the axial right end of the rod 5 pushes the end face 22 a on the left side in the axial direction of the spool 22 by integrally moving the rod 5 to the right in the axial direction using the driving force of the plunger 4. The amount of control fluid flowing from the input port (not shown) of the sleeve 21 to the output port can be changed by moving the shaft 22 to the right in the axial direction against the biasing force of a spring (not shown).

Further, when the current to the coil 34 is cut off and the magnetic force generated between the annular surface portion 32g of the stator 32 and the plunger 4 is relatively weakened, as shown in FIG. As a result, the spool 22 moves to the left in the axial direction, and the end face 22a on the left side in the axial direction of the spool 22 abuts against the recess 32j of the stator 32 to restrict the movement of the spool 22. Side) to the predetermined position shown in FIG.

According to this, by switching the off state of the solenoid valve 1 shown in FIG. 1 and the on state of the solenoid valve 1 shown in FIG. 4, the plunger 4 is moved to the first accommodation portion 32 e of the stator 32 (space S2). It can be moved axially inside. At this time, the hydraulic oil L filling the inside of the first accommodation portion 32 e of the stator 32 passes through the through hole 4 a provided in the plunger 4 and the space on the axial left side (holder 37 side) of the plunger 4 and the axial direction of the plunger 4 It is moving between the space on the right side (ring surface 32g side).

Further, in order to move the plunger 4 accurately and quickly by switching the solenoid valve 1 on and off, the hydraulic oil L in the first accommodation portion 32e of the stator 32 is moved to the breathing hole 21c of the sleeve 21 and the solenoid case 30. By causing the outside to breathe through the opening 30d, the hydraulic oil L in the moving direction of the plunger 4 can be discharged, and the resistance by the hydraulic oil L can be suppressed. Furthermore, the holder 37 is provided at the tip of the first accommodation portion 32e of the stator 32 opposite to the spool 22 of the plunger 4, that is, the open end surface 32h of the stator 32, the valve housing shown in FIGS. At the time when the oil level of the hydraulic oil L decreases (for example, at the oil level L2 or when the oil level of the hydraulic oil L is temporarily inclined), the space 37 in the stator 32 (in particular, the first accommodation portion 32e) The hydraulic oil L can be blocked, so that the deterioration of the oil level in the space S2 in the stator 32 can be suppressed, the deterioration of the operability of the plunger 4 can be prevented, and the hydraulic control can be performed stably. The amount of hydraulic oil flowing out from the space S2 in the stator 32 to the space S1 in the sleeve 21 via the clearance between the inner peripheral surface of the second accommodation portion 32f of the stator 32 and the outer peripheral surface of the rod 5 is small. is there.

Further, the stator 32 axially extends to a substantially bottom portion of the solenoid case 30 so as to accommodate the plunger 4, and in the space S2 in the stator 32, the axial right side of the plunger 4 in the first accommodation portion 32 e (annular surface portion 32g) is substantially closed by the rod 5 disposed in the annular surface portion 32g of the stator 32 and the second accommodation portion 32f, the space in the axial direction right of the plunger 4 in the first accommodation portion 32e of the stator 32 The hydraulic oil L is blocked, and the decrease in the oil level of the hydraulic oil L in the space S2 in the stator 32 can be further suppressed.

On the other hand, as in the prior art, in the solenoid valve 1 in which the holder 37 is not provided at the open end face 32h of the stator 32, the oil level of the hydraulic oil L in the valve housing decreases (for example, in the case of the oil level L2), The hydraulic oil L in the space S2 in the stator 32 flows from the opening end face 32h of the stator 32 through the breathing path 33 in the solenoid case 30 to the outside from the opening 30d, and the oil in the hydraulic oil L in the space S2 in the stator 32 Due to the reduction of the surface, the operability of the plunger 4 is deteriorated and the hydraulic control becomes unstable.

Further, the holder 37 provided on the opening end surface 32h of the stator 32 is provided with a groove portion 37d extending in the radial direction upward in the radial direction, thereby, for example, breathing of the sleeve 21 when the oil level of the hydraulic oil L in the valve housing decreases. Even when the working oil L mixed with air is sucked into the space S2 in the stator 32 through the hole 21c, the spool 22 of the plunger 4 is discharged by discharging the air to the outside of the stator 32 through the groove 37d of the holder 37. Since the air which has turned around to the opposite side (holder 37 side) can be prevented from staying in the space S2 in the stator 32, the driving of the plunger 4 can be stabilized. Furthermore, since the groove 37 d of the holder 37 is formed to open radially upward with respect to the space S 2 in the stator 32, the hydraulic oil L from the groove 37 d of the holder 37 decreases when the oil level of the hydraulic oil L decreases. And the space S2 in the stator 32 is axially closed by the holder 37, and the space S2 in the stator 32 is easily filled with the hydraulic oil L. Since the groove 37d of the holder 37 linearly extends upward in the radial direction, the air mixed in the space S2 in the stator 32 does not stay in the middle of the groove 37d, and the air is outside the stator 32. Can be discharged smoothly.

Further, by inserting the projection 32k of the stator 32 into the insertion hole 37e of the holder 37, the holder 37 and the stator 32 are positioned in the circumferential direction so that the groove 37d of the holder 37 is disposed radially upward. Therefore, the groove 37d of the holder 37 can be disposed radially upward, and the hydraulic oil L in the space S2 in the stator 32 can be reliably blocked.

Further, since the holder 37 is detachably attached to the open end face 32 h of the stator 32, the maintainability of the inside of the stator 32 can be enhanced.

Further, since the holder 37 is provided with the small diameter projecting portion 37c which protrudes to the right in the axial direction from the projecting portion 37b, when the plunger 4 is moved to the opposite side to the spool 22 when the solenoid valve 1 is off. Since it is possible to axially separate between the holder 37 and the end surface on the axial left side of the plunger 4 (see FIGS. 4 and 6), the inside of the stator 32 is moved when moving the plunger 4 to the opposite side to the spool 22. The hydraulic oil L can be easily left in the space S2.

In addition, since the plunger 4 is provided with the through hole 4a penetrating in the axial direction on the upper side with respect to the radial center, the space S2 in the stator 32 when the oil level of the hydraulic oil L in the valve housing decreases. Since the amount of fluid flowing through the through hole 4a of the plunger 4 can be suppressed, the decrease in the oil level of the hydraulic oil L in the space S2 in the stator 32 can be suppressed.

Next, a solenoid valve according to a second embodiment will be described with reference to FIGS. 7 and 8. The same reference numerals are given to the same components as the components shown in the above embodiment, and the redundant description will be omitted.

The solenoid valve 101 in the second embodiment will be described. As shown in FIG. 7, in the solenoid valve 101 of the present embodiment, the stator 132 is formed in a cylindrical shape with a flange, and vertically below the inner peripheral portion of the end on the left side in the axial direction of the cylindrical portion 132a A bottomed insertion groove 132k (positioning means) which is recessed from the inner diameter side to the outer diameter side and opens in the axial left direction is provided, and a holder 137 (a weir) is attached.

As shown in FIGS. 7 and 8, the holder 137 is formed in a disk shape having substantially the same diameter as the outer diameter of the cylindrical portion 132a of the stator 132, and the end surface 137a on the right side in the axial direction A cylindrical convex portion 137 b protruding rightward is provided. The convex portion 137 b is formed to have an outer diameter substantially the same as the inner diameter of the through hole 132 d (first accommodation portion 132 e) of the stator 132, and the convex portion 137 b can be inserted into the through hole 132 d of the stator 132. Further, on the axial left side (end face 137a side) of the outer peripheral portion of the convex portion 137b, a shallow annular groove 137f is provided in the radial direction. In addition, a cylindrical protrusion 137 c having a diameter smaller than that of the protrusion 137 b and projecting to the right in the axial direction is provided at the radial center of the protrusion 137 b.

Further, the holder 137 is provided with a substantially L-shaped groove portion 137d (fluid passage) extending in the radial direction from the radial upper side of the convex portion 137b to the outer peripheral portion of the end surface 137a. A projecting portion 137e (positioning means) having a substantially rectangular cross section which protrudes downward in the vertical direction from the outer peripheral portion on the side is provided. The projecting portion 137e is formed to have an outer shape that is substantially the same as the circumferential dimension of the concave insertion groove 132k of the stator 132 described above. According to this, when attaching the holder 137 to the opening end face 132h of the stator 132, the end face 137a of the holder 137 and the opening end face 132h of the stator 132 abut each other, and the projection 137e of the holder 137 is inserted into the insertion groove 132k of the stator 132. The holder 137 and the stator 132 can be positioned in the circumferential direction such that the groove portion 137d of the holder 137 is disposed on the radially upper side by inserting and fitting the through hole from the opening on the axial left side. In addition, since the holder 137 and the stator 132 can be positioned in the circumferential direction by being guided by two side surfaces in the circumferential direction of the protruding portion 137e, the mounting operation of the holder 137 can be easily performed and the attachment accuracy is good.

Further, a gap spaced apart in the radial direction is formed between the protrusion 137e of the holder 137 and the insertion groove 132k of the stator 132, and the gap is in communication with the space S2 in the stator 132 and the protrusion The groove portion 137d communicates with an annular groove 137f provided on the axial left side (end surface 137a side) of the outer peripheral portion of the portion 137b. According to this, since the hydraulic oil L can be made to turn from the inside of the insertion groove 132k of the stator 132 to the groove portion 137d on the radially upper side via the annular groove 137f, the movement of the plunger 4 to the opposite side to the spool 22 Sometimes, the hydraulic oil L can be easily left in the space S2 in the stator 132.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions may be made without departing from the scope of the present invention. Be

For example, in the above embodiment, the

solenoid valve

1, 101 is a separate holder 37 having

grooves

37d, 137d on the radially upper side as a weir for stopping the hydraulic oil L at the open end faces 32h, 132h of the

stators

32, 132. 137 is described above, but the invention is not limited thereto, and the weir may be used to block the hydraulic oil in the space in the stator and to circulate the hydraulic oil from the radially upper side to the outside of the stator For example, it may be configured integrally with the stator.

Further, although the

grooves

37 d and 137 d are provided in the

holders

37 and 137 in the embodiment, the grooves may be provided on the open end surfaces 32 h and 132 h of the

stators

32 and 132.

Moreover, although the said embodiment demonstrated the aspect in which the

stators

32 and 132 are provided as a cylinder which accommodates the plunger 4, a cylinder may be comprised by the inner peripheral space of a solenoid molded object.

Further, in the above embodiment, as a spacer for axially separating between the

holders

37 and 137 and the end surface on the left side in the axial direction of the plunger 4, it protrudes axially rightward from the

convex portions

37 b and 137 b of the

holders

37 and 137. Although the small

diameter projecting portions

37c and 137c are provided, the present invention is not limited to this, and the spacer may be provided separately from the holder.

1, 101 Solenoid valve 2 Valve part 3 Solenoid part 4 Plunger (movable iron core)
4a through hole 5 rod 21 sleeve 21a through hole 21b opening 21c breathing hole (opening)
22 spool 30 solenoid case 30a cylindrical portion 30b first housing cylindrical portion 30c second housing cylindrical portion 30d opening (opening)
31 Solenoid compact 32, 132 Stator (cylindrical body)
32a, 132a cylindrical portion 32b annular recessed portion

32c flange portion

32d, 132d through

hole

32e, 132e first accommodating portion 32f second accommodating portion 32g

annular surface portion

32h, 132h opening end face 32j recessed portion 32k protruding portion (positioning means)
33 Respiratory path 34

Coil

37, 137 Holder (堰)
37a, 137a

end face

37b, 137b

convex portion

37c,

137c projecting portion

37d, 137d groove portion (fluid passage)
37e Insertion hole (positioning means)
132k insertion groove (positioning means)
137e Protrusions (positioning means)
137f Annular groove L Hydraulic oil L1, L2 Oil surface S1, S2 space

Claims

With the spool,
A sleeve in which the spool is axially movably disposed;
A movable core disposed at one end of the spool and moving the spool;
A solenoid molded body disposed on the outer periphery of the movable core;
A solenoid case for accommodating the movable core and the solenoid molded body;
And a cylinder for accommodating the movable iron core in the inner space,
An immersion type solenoid valve horizontally mounted on a mounting member, comprising:
A solenoid valve characterized in that the cylinder has a weir at the end opposite to the spool of the movable iron core.
The solenoid valve according to claim 1, wherein a spacer is provided between the weir and the movable core to axially separate the weir and the movable core.
The solenoid valve according to claim 1 or 2, wherein the weir is a holder detachably attached to the opening of the cylinder.
The solenoid valve according to claim 3, wherein the holder is provided with a fluid passage communicating with the outside of the cylinder at an upper portion of a surface facing the cylinder.
The solenoid valve according to any one of claims 1 to 4, wherein the movable iron core is provided with a through hole which penetrates in the axial direction above the radial center.
The solenoid valve according to any one of claims 3 to 5, further comprising positioning means for positioning the holder and the cylindrical body in the circumferential direction.
The sleeve is attached to the cylindrical body, and a rod is disposed in the cylindrical body between the movable iron core and one end side of the spool.
The solenoid valve according to any one of claims 1 to 6, wherein the rod is movable inside the cylinder.