JP2012225429A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure, which is capable of reducing the number of components, and also capable of guiding a coil spring in a manufacturing process even when the length of a sleeve or a spool is suppressed, concerning a solenoid valve in which stick-out of a member fitted into an outer shell is not required to be taken into account in the manufacturing process.SOLUTION: This solenoid valve comprises a support member 8 supporting one end in an axial direction of a coil spring inside a sleeve. In the support member 8, a notch 29a extending from an inner circumferential edge 27a to an outer circumferential edge 27b in a base part 27 and a notch 29b extending from an inner circumferential surface 28a to an outer circumferential surface 28b in a protrusion 28 are provided continuously in an axial direction. The support member 8 is provided with elasticity in the circumferential direction by a first notch 29 obtained by merging the notches 29a, 29b continuously provided.

Description

  The present invention relates to a solenoid valve.

  2. Description of the Related Art Conventionally, an electromagnetic valve having the following configuration is well known, and is used, for example, for switching a hydraulic pressure supply destination in a variable valve timing mechanism or an automatic transmission.

  That is, the conventional solenoid valve includes a sleeve in which a plurality of ports that are fluid inflow / outflow ports are formed, and a spool that is slidably supported in the axial direction inside the sleeve and changes the communication state between the plurality of ports. The coil is disposed coaxially with the spool at the other axial end of the sleeve and the spool, generates a magnetic flux when energized, and is disposed on the inner peripheral side of the coil, and is attracted to one axial end by the magnetic flux generated by the coil. A movable iron core that drives the spool to one axial end side, and a coil spring that is set inside the sleeve to one axial end side of the spool and biases the spool to the other axial end side (for example, Patent Document 1). 2).

By the way, according to the electromagnetic valve of Patent Document 1, the sleeve is provided in a bottomed cylindrical shape having a bottom at one axial end, and the bottom of the sleeve functions as a support seat for supporting one axial end of the coil spring. It functions as a stopper for the spool driven to one axial end.
According to the solenoid valve of Patent Document 2, the sleeve is provided in a cylindrical shape with both axial ends open, and a retainer that functions as a support seat for the coil spring and a stopper for the spool is disposed at one axial end of the sleeve. Has been.

  However, when the bottom portion of the sleeve is used as a stopper for the coil spring support seat and spool by using a bottomed cylindrical sleeve like the electromagnetic valve of Patent Document 1, the manufacturing process is complicated in the following points.

  That is, according to the electromagnetic valve of Patent Document 1, for example, a member such as a coil spring or a spool is sequentially inserted into a sleeve as an outer shell of the electromagnetic valve to assemble the valve portion. A solenoid part is assembled by sequentially inserting members such as a coil and a movable iron core into a yoke as an outer shell of the valve.

  Finally, the opening edge on the member insertion side of the sleeve and the opening edge on the member insertion side of the yoke are brought into contact with each other, and the yoke is caulked and fixed to the sleeve. For this reason, it is necessary to devise so that a member once inserted into the sleeve or the yoke does not jump out of the sleeve or the yoke in the process of caulking by matching the opening edges.

  On the other hand, according to the solenoid valve of Patent Document 2, for example, after assembling the solenoid part, the sleeve is caulked and fixed, and then a spool, a coil spring, a retainer, etc. are inserted into the sleeve, and finally snapped. A ring is attached to the sleeve to prevent the inserted member from popping out. For this reason, compared with the electromagnetic valve of patent document 1, since it is not necessary to worry so much about the protrusion of the member once inserted in the manufacturing process, the manufacturing process can be simplified.

However, according to the electromagnetic valve of patent document 2, compared with the electromagnetic valve of patent document 1, two parts, a retainer and a snap ring, are additionally required, and the number of parts increases.
Moreover, according to the electromagnetic valve of patent document 2, it is necessary to assemble while compressing a coil spring, and in order to guide a coil spring in compression, it is necessary to lengthen a sleeve and a spool, for example. Furthermore, if the coil spring is compressed without being guided by avoiding lengthening the sleeve or the spool, the coil spring may be set in a poor posture due to buckling or the like.

JP 2007-315557 A JP-A-11-002354

  The present invention has been made to solve the above-described problems, and its purpose is to provide a component in an electromagnetic valve that does not need to be concerned about jumping out of a member inserted into a sleeve or a yoke in a manufacturing process. An object of the present invention is to provide a structure capable of guiding a coil spring in a manufacturing process even when the number of points is reduced and the length of a sleeve or a spool is suppressed.

[Means of Claim 1]
According to the first aspect of the present invention, the electromagnetic valve includes a cylindrical sleeve having a plurality of ports that are fluid inflow / outflow ports, and an axially slidable support inside the sleeve. A spool that varies the communication state of the sleeve, a coil that is coaxially arranged with the spool at the other axial end of the sleeve and the spool, generates a magnetic flux when energized, and a magnetic flux that is arranged on the inner peripheral side of the coil and that is generated by the coil A movable iron core that is attracted to one axial end side to drive the spool to one axial end side, and a coil spring that is set on one axial end side of the spool inside the sleeve and biases the spool to the other axial end side. And a support member disposed on one end side in the axial direction of the coil spring inside the sleeve and supporting one end in the axial direction of the coil spring.

  The support member has an annular base, and a cylindrical protrusion that protrudes from the base to the other end in the axial direction so as to surround the inner peripheral edge of the base and fits to the inner periphery on the one end in the axial direction of the coil spring. Have Further, in the support member, a notch reaching from the inner peripheral edge to the outer peripheral edge at the base portion and a notch reaching from the inner peripheral surface to the outer peripheral surface at the protruding portion are provided continuously in the axial direction. And if two cuts provided in a row are combined and defined as the first cut, the support member has elasticity in the circumferential direction by the first cut.

  As a result, the support member can function as a stopper for the support seat of the coil spring and the spool, and can also function as a snap ring that is mounted to prevent the spool or the like from popping out. For this reason, for example, since the functions of the two parts of the retainer and the snap ring required in the electromagnetic valve of Patent Document 2 can be achieved by one part, the number of parts can be reduced.

  Moreover, the coil spring can be guided on the inner peripheral side by fitting the protruding portion of the support member to the inner periphery on one end side in the axial direction of the coil spring. For this reason, even if it does not lengthen a sleeve and a spool so much, since a coil spring can be guided and the possibility of buckling etc. can be reduced, the length of a sleeve or a spool can be controlled.

  As described above, in the solenoid valve in a mode in which it is not necessary to worry about the jumping out of the member inserted in the sleeve or the yoke in the manufacturing process, the number of parts can be reduced and the length of the sleeve or the spool can be suppressed. The coil spring can be guided in the manufacturing process.

[Means of claim 2]
According to the second aspect of the present invention, the one axial end of the spool is provided with a recess that opens to one axial end, and the other axial end of the coil spring is fitted inside the recess.
As a result, the coil spring can be guided on the outer peripheral side on the other axial end side. For this reason, since the coil spring can be guided on both the inner and outer peripheral sides, the possibility of buckling and the like can be further reduced.

[Means of claim 3]
According to the third aspect of the present invention, the one end in the axial direction of the spool is provided with a convex portion protruding toward the one end side in the axial direction, and the convex portion is fitted to the inner periphery of the other end side in the axial direction of the coil spring. .
Thus, when the support member functions as a stopper for the spool, the spool can be contacted by the protruding portion having a thickness in the axial direction. For this reason, it becomes easy to ensure the strength of the support member.

[Means of claim 4]
According to the means of claim 4, the protrusion is provided with a protrusion for hooking the coil spring.
Thereby, since a possibility that a coil spring may fall from a support member can be reduced, an assembly of a solenoid valve can be performed more reliably.

[Means of claim 5]
According to the means of claim 5, apart from the first notch, the notch that extends from the inner periphery to the outer periphery without reaching the outer periphery at the base and the notch that reaches the outer periphery from the inner periphery to the projecting portion in the axial direction It is provided in a series. In addition to the first cut, if two cuts provided in a row are defined as a second cut, two or more second cuts are provided.
Thereby, since the guide of the coil spring by a protrusion part can be disperse | distributed and equalized in the circumferential direction, a coil spring can be guided more stably.

1 is an overall configuration diagram of a solenoid valve (Example 1). FIG. It is a principal part block diagram of a solenoid valve (Example 1). (A) is a top view of a supporting member, (b) is an AA sectional view of (a), (c) is a BB sectional view of (a), (d) is (a) (Example 1) which is CC sectional drawing of). (Example 2) which is a principal part block diagram of a solenoid valve. (Example 3) which is a principal part block diagram of a solenoid valve. It is a top view of a supporting member (modification). It is a top view of a supporting member (modification).

  The solenoid valve according to the first embodiment has a cylindrical sleeve in which a plurality of ports that are fluid inflow / outflow ports are formed, and is slidably supported in the axial direction inside the sleeve to change the communication state between the plurality of ports. A spool that is coaxially arranged with the spool at the other axial end of the sleeve and the spool, and generates a magnetic flux when energized, and is disposed on the inner peripheral side of the coil and is axially one end side by the magnetic flux generated by the coil A movable iron core that is attracted to the one end in the axial direction and driven to one end in the axial direction, a coil spring that is set on one end in the axial direction of the spool inside the sleeve, and that biases the spool toward the other end in the axial direction; A support member disposed on one end side of the coil spring in the axial direction and supporting one end of the coil spring in the axial direction.

  The support member has an annular base, and a cylindrical protrusion that protrudes from the base to the other end in the axial direction so as to surround the inner peripheral edge of the base and fits to the inner periphery on the one end in the axial direction of the coil spring. Have Further, in the support member, a notch reaching from the inner peripheral edge to the outer peripheral edge at the base portion and a notch reaching from the inner peripheral surface to the outer peripheral surface at the protruding portion are provided continuously in the axial direction. And if two cuts provided in a row are combined and defined as the first cut, the support member has elasticity in the circumferential direction by the first cut.

Further, a concave portion that opens to one axial end side is provided at one axial end of the spool, and the other axial end of the coil spring is fitted inside the concave portion.
Furthermore, apart from the first cut, a cut extending from the inner peripheral edge to the outer peripheral edge without reaching the outer peripheral edge at the base portion and a cut reaching the outer peripheral surface from the inner peripheral surface at the projecting portion are provided continuously in the axial direction. . In addition to the first cut, if two cuts provided in a row are defined as a second cut, two or more second cuts are provided.

According to the solenoid valve of the second embodiment, the one end in the axial direction of the spool is provided with a convex portion that protrudes toward one end in the axial direction, and the convex portion is fitted to the inner periphery of the other end in the axial direction of the coil spring. Yes.
According to the solenoid valve of the third embodiment, the protrusion is provided with a protrusion for hooking the coil spring.

[Configuration of Example 1]
The structure of the solenoid valve 1 of Example 1 is demonstrated based on FIGS. 1-3.
The solenoid valve 1 includes a cylindrical sleeve 3 in which a plurality of ports 2 that are fluid inflow / outflow ports are formed, and an axially slidable support inside the sleeve 3 to establish a communication state between the plurality of ports 2. The variable spool 4 is disposed coaxially with the spool 4 on the other axial end side of the sleeve 3 and the spool 4 and generates a magnetic flux when energized. The coil 5 is disposed on the inner peripheral side of the coil 5. A movable iron core 6 that is attracted to one end in the axial direction by the generated magnetic flux and drives the spool 4 to one end in the axial direction, and set inside the sleeve 3 on one end side in the axial direction of the spool 4, and the other end in the axial direction And a support member 8 that is disposed on one end side in the axial direction of the coil spring 7 inside the sleeve 3 and supports one end in the axial direction of the coil spring 7.

  Further, in the solenoid valve 1, a valve portion 10 for switching a fluid flow path is constituted by the sleeve 3, the spool 4, the coil spring 7, the support member 8, and the like, and the valve portion 10 is operated by the coil 5, the movable iron core 6 and the like. A solenoid unit 11 is configured to generate a driving force for the purpose. The solenoid valve 1 is used, for example, for switching a hydraulic pressure supply destination in a variable valve timing mechanism or an automatic transmission.

  In the sleeve 3, for example, five ports 2 (hereinafter, the port 2 may be referred to as ports 2a, 2b, 2c, 2d, and 2e sequentially from one end to the other end in the axial direction) are arranged in the axial direction. Is provided. Also, on the inner peripheral surface of the sleeve 3, one end side of the port 2a in the axial direction, between the ports 2a and 2b, between the ports 2b and 2c, between the ports 2c and 2d, between the ports 2d and 2e, and Cylindrical slidable contact surfaces 12a, 12b, 12c, 12d, 12e, and 12f that receive the slidable contact of the spool 4 are provided on the other axial end of 2e.

  The sleeve 3 is provided in a substantially cylindrical shape with both axial ends open, and one axial end inside the sleeve 3 is defined by a support member 8. A yoke 13 is caulked and fixed to the other axial end of the sleeve 3, and the other axial end of the sleeve 3 is sealed by a solenoid portion 11.

  The spool 4 includes, for example, four land portions arranged in the axial direction (hereinafter, the four land portions are sequentially referred to as land portions 14a, 14b, 14c, and 14d from one end to the other end in the axial direction). Yes. And the land part 14a is slidably contacted with the slidable contact surface 12a, and seals the fluid flow region inside the sleeve 3 at one axial end side. The land portion 14d is in sliding contact with the sliding contact surface 12f and seals the fluid flow region inside the sleeve 3 at the other end in the axial direction.

The land portion 14b is in sliding contact with at least one of the sliding contact surface 12b and the sliding contact surface 12c, is in sliding contact with the sliding contact surface 12b, and communicates between the ports 2b and 2c, and the sliding contact surface 12c. The state in which the ports 2a and 2b communicate with each other is switched.
The land portion 14c is in sliding contact with at least one of the sliding contact surface 12d and the sliding contact surface 12e, is in sliding contact with the sliding contact surface 12e, and communicates between the ports 2c and 2d, and the sliding contact surface 12d. The state in which the ports 2d and 2e communicate with each other is switched.
A contact portion 15 that contacts the movable iron core 6 is provided at the other axial end of the land portion 14d.

The coil 5 is wound around a coil bobbin 17 and is supplied with power from a power source via a terminal 18.
The movable iron core 6 is accommodated in a nonmagnetic cup 19 arranged on the inner peripheral side of the coil bobbin 17 and moves in the axial direction while sliding on the inner peripheral surface of the cup 19. Further, the contact portion 15 of the spool 4 is in contact with one end surface in the axial direction of the movable iron core 6.

  A fixed iron core 20 is disposed on the outer peripheral side of the cup 19 on one end side in the axial direction of the movable iron core 6, and a cylinder 21 made of a magnetic material is disposed between the coil bobbin 17 and the cup 19 on the outer peripheral side of the movable iron core 6. A cylindrical yoke 13 is disposed on the outer peripheral side of the coil 5. Further, a bracket 22 for attaching the electromagnetic valve 1 to an automatic transmission or the like is sandwiched between a step provided on the yoke 13 and the fixed iron core 20, and the bracket 22 is provided with a magnetic material. .

For this reason, when the coil 5 is energized, a magnetic flux passing through the movable iron core 6, the fixed iron core 20, the bracket 22, the yoke 13, and the cylindrical body 21 is generated, and the movable iron core 6 is attracted to one axial end side by this magnetic flux. Thus, the spool 4 is moved to one end side in the axial direction.
The movable iron core 6 is provided with a breathing hole (not shown) so that gas can flow in and out between one end side and the other end side of the movable iron core 6 in the axial direction. And since the inflow and outflow of gas becomes possible between the axial direction one end side and other end side of the movable iron core 6, the movable iron core 6 can move to an axial direction smoothly.

  The coil spring 7 is set in the axial direction between the support member 8 and the spool 4 inside the sleeve 3. Here, the land portion 14 a occupying one end in the axial direction of the spool 4 is provided with a recess 24 that opens to one end in the axial direction, and the other axial end of the coil spring 7 is fitted inside the recess 24.

  The support member 8 is fitted in an annular groove 25 provided on the inner periphery of the sleeve 3. The support member 8 protrudes from the base 27 to the other end in the axial direction so as to surround the annular plate-shaped base 27 and the inner peripheral edge 27 a of the base 27, and extends to the inner periphery of the coil spring 7 at one end in the axial direction. It has a cylindrical projection 28 to be fitted. Further, in the support member 8, a notch 29 a reaching from the inner peripheral edge 27 a to the outer peripheral edge 27 b in the base portion 27 and a notch 29 b reaching from the inner peripheral surface 28 a to the outer peripheral surface 28 b in the projecting portion 28 are provided continuously in the axial direction. (Hereinafter, the cuts 29a and 29b provided in a row may be collectively referred to as a first cut 29). The entire support member 8 is elastic in the circumferential direction due to the presence of the first cuts 29.

Accordingly, the support member 8 has a snap ring function, is compressed in the circumferential direction so that the first cut 29 is narrowed in the circumferential direction, and is fitted into the groove 25, and the outer peripheral edge 27 b of the base portion 27 is the bottom surface of the groove 25. The ring is pressed against the ring.
Here, the cuts 29a spread radially from the inner peripheral edge 27a toward the outer peripheral side and are opened at the outer peripheral edge 27b. In addition, the notch 29b is continuous perpendicularly to the other end side in the axial direction from the opening in the inner peripheral edge 27a of the notch 29a, and reaches the outer peripheral surface 28b from the inner peripheral surface 28a in the entire axial range of the protruding portion 29b. Yes.

  Moreover, the opening in the outer peripheral edge 27b of the notch 29a is narrowed by the bulging part 30 extended from the circumferential direction both ends of an opening. The bulging portion 30 is provided with a hole 31 into which a part of a jig (not shown) for holding the support member 8 is fitted when the support member 8 is mounted on the sleeve 3. A part of the jig fitted in the hole 31 is held by the jig and attached to the sleeve 3.

  The support member 8 is urged toward the one end side in the axial direction by the coil spring 7, abuts against the side face on one end side in the axial direction of the both sides of the groove 25, and the shaft is between the side face on the other end side in the axial direction. A gap in the direction is formed. That is, the axial width of the groove 25 is set so as to have a margin with respect to the axial width of the base portion 27 in order to facilitate mounting of the support member 8.

  Further, in addition to the first notch 29, the support member 8 has a notch 33 a that extends from the inner peripheral edge 27 a to the outer peripheral edge 27 b without reaching the outer peripheral edge 27 b at the base portion 27, and an inner peripheral surface 28 a to an outer peripheral surface 28 b at the protruding portion 28. The reaching notches 33b are continuously provided in the axial direction (hereinafter, the notches 33a and 33b provided in succession may be collectively referred to as the second notches 33 separately from the first notches 29). . The protrusion 28 has elasticity in the circumferential direction due to the presence of both the first and second cuts 29 and 33.

Thus, the projecting portion 28 is compressed in the circumferential direction so that the notches 29a and 33a are narrowed in the circumferential direction, is fitted to the inner circumference on one end side in the axial direction of the coil spring 7, and is stretched on the outer circumferential side to be the shaft of the coil spring 7 Guide one end of the direction.
Here, the notches 33a spread radially from the inner peripheral edge 27a of the base portion 27 toward the outer peripheral side, and stop spreading on the inner peripheral side of the outer peripheral edge 27b. The notch 33b is continuous perpendicularly to the other end side in the axial direction from the opening at the inner peripheral edge 27a of the notch 33a, and reaches the outer peripheral surface 28b from the inner peripheral surface 28a in the entire axial range of the protruding portion 28. Yes.

  Further, since the protruding portion 28 has a smaller diameter than the recessed portion 24, the protruding portion 28 relatively moves into the recessed portion 24 when the spool 4 is driven to the one axial end side, and one end in the axial direction of the land portion 14a. (One end in the axial direction of the spool 4) is in contact with the base 27 and is further restricted from moving toward one end in the axial direction. For this reason, the base 27 functions as a stopper for the spool 4.

Further, the projecting portion 28 is fitted to the inner periphery of the coil spring 7 on one end side in the axial direction, so that one end in the axial direction of the coil spring 7 contacts the base portion 27. For this reason, the base 27 functions as a support seat for the coil spring 7.
Two second cuts 33 are provided, and the protrusion 28 is equal to the total number of the first and second cuts 29 and 33 in the circumferential direction due to the presence of the first and second cuts 29 and 33 3. It is divided into two. The first cuts 29 and the two second cuts 33 are provided at substantially equal angular intervals around the axis of the support member 8.

[Effect of Example 1]
The electromagnetic valve 1 according to the first embodiment is set on one end side in the axial direction of the spool 4 inside the sleeve 3, and the coil spring 7 that biases the spool 4 toward the other end side in the axial direction, and the coil spring 7 inside the sleeve 3. And a support member 8 that is disposed on one axial end side of the coil spring 7 and supports one axial end of the coil spring 7. Further, in the support member 8, a notch 29a reaching from the inner peripheral edge 27a to the outer peripheral edge 27b in the base portion 27 and a notch 29b reaching from the inner peripheral surface 28a to the outer peripheral surface 28b in the projecting portion 28 are provided continuously in the axial direction. Yes. And the supporting member 8 comprises elasticity in the circumferential direction by the 1st notch 29 which combined the notches 29a and 29b provided in a row.

Thereby, the manufacturing process of the electromagnetic valve 1 can be made into a simple process which does not need to worry so much about the protrusion of the member once inserted in the outer shell body of the electromagnetic valve 1 such as the sleeve 3 and the yoke 13.
That is, for example, after the solenoids 11 are assembled by sequentially inserting members such as the coil 5 and the movable iron core 6 into the yoke 13, the sleeve 3 is caulked and fixed to the yoke 13, and then the spool 4 and the like are placed in the sleeve 3. The coil spring 7 and the like are inserted, and finally the support member 8 is elastically compressed in the circumferential direction and attached to the sleeve 3 to prevent the inserted member from popping out.

  For this reason, in the manufacturing process of the electromagnetic valve 1, it is necessary to be more concerned about the protruding member once inserted than when the sleeve 3 is caulked and fixed to the yoke 13 after the valve portion 10 and the solenoid portion 11 are individually assembled. Since there is no, the manufacturing process can be simplified.

  Further, the support member 8 can function as a support seat for the coil spring 7 and a stopper for the spool 4 and can also function as a snap ring that is mounted to prevent the spool 4 and the like from popping out. For this reason, for example, since the functions of the two parts of the retainer and the snap ring required in the electromagnetic valve of Patent Document 2 can be achieved by one part, the number of parts can be reduced.

  Furthermore, the coil spring 7 can be guided on the inner peripheral side by fitting the protruding portion 28 of the support member 8 to the inner periphery on the one axial end side of the coil spring 7. For this reason, even if the sleeve 3 and the spool 4 are not so long, the one end side in the axial direction of the coil spring 7 can be guided in the manufacturing process of the electromagnetic valve 1 to reduce the possibility of buckling. Further, the length of the spool 4 can be suppressed.

  As described above, the number of parts can be reduced and the lengths of the sleeve 3 and the spool 4 can be reduced with respect to the electromagnetic valve 1 which is not required to be concerned about the protrusion of the member inserted into the sleeve 3 or the yoke 13 in the manufacturing process. Even in the manufacturing process, the coil spring 7 can be guided.

A recess 24 that opens to one end in the axial direction is provided at one axial end of the spool 4, and the other axial end of the coil spring 7 is fitted inside the recess 24.
Thereby, the coil spring 7 can be guided on the outer peripheral side on the other axial end side. For this reason, since the coil spring 7 can be guided on both the inner and outer peripheral sides, the risk of buckling and the like can be further reduced in the manufacturing process.

In addition to the first notch 29, the support member 8 includes a notch 33 a that extends from the inner peripheral edge 27 a to the outer peripheral edge 27 b without reaching the outer peripheral edge 27 b at the base portion 27, and an inner peripheral surface 28 a to an outer peripheral surface 28 b at the protruding portion 28. The reaching notch 33b is provided continuously in the axial direction. In addition to the first cuts 29, two second cuts 33 including the cuts 33a and 33b provided in a row are provided.
Thereby, since the guide of the axial direction one end side of the coil spring 7 by the protrusion part 28 can be disperse | distributed and equalized in the circumferential direction, the coil spring 7 can be guided more stably.

[Example 2]
According to the electromagnetic valve 1 of the second embodiment, as shown in FIG. 4, the land portion 14 a is provided with a convex portion 35 projecting toward one end in the axial direction at one end in the axial direction. Is fitted to the inner circumference on the other axial end side.

Accordingly, when the support member 8 functions as a stopper for the spool 4, the spool 4 can be contacted by the protruding portion 28 having a thickness in the axial direction. For this reason, it is easy to ensure the strength of the support member 8.
The convex portion 35 is provided with substantially the same diameter as the protruding portion 28, and the concave portion 24 is provided with a smaller diameter than the convex portion 35 and opens at one end in the axial direction of the convex portion 35.

Example 3
According to the solenoid valve 1 of the third embodiment, as shown in FIG. 5, the protrusion 28 is provided with a protrusion 36 that hooks the coil spring 7. Here, the protrusion 36 has, for example, a hook shape protruding from the outer peripheral surface 28b at the other end in the axial direction of the protruding portion 28 to the outer peripheral side. The protrusion 36 hooks the coil spring 7 from the inner peripheral side of the coil spring 7.
Thereby, since possibility that the coil spring 7 may drop | omit from the support member 8 can be reduced, the assembly of the solenoid valve 1 can be performed more reliably.

[Modification]
The aspect of the electromagnetic valve 1 is not limited to Examples 1-3, and various modifications can be considered.
For example, according to the solenoid valve 1 of the first to third embodiments, the support member 8 is provided with two second cuts 33, but may be provided with three or more second cuts 33, for example, FIG. As shown in FIG. 6, five second cuts 33 may be provided in the support member 8. Further, as shown in FIG. 7, only the first cut 29 may be provided without providing the second cut 33.
Further, the recess 24 does not need to be closed at the other end in the axial direction. For example, the recess 24 may be opened at the other end in the axial direction of the spool 4 to form a hole.

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Port 3 Sleeve 4 Spool 5 Coil 6 Movable iron core 7 Coil spring 8 Support member 24 Recessed part 27 Base 27a Inner peripheral edge 27b Outer peripheral edge 28 Projection part 28a Inner peripheral face 28b Outer peripheral face 29 First notch 29a Notch 29b Notch 33 1st 2 notches 33a notches 33b notches 35 protrusions 36 protrusions

Claims (5)

A cylindrical sleeve formed with a plurality of ports that are fluid outlets;
A spool that is slidably supported in the axial direction inside the sleeve and changes a communication state between the plurality of ports;
A coil that is arranged coaxially with the spool at the other axial end of the sleeve and the spool, and generates a magnetic flux when energized;
A movable iron core disposed on the inner peripheral side of the coil and attracted to one end in the axial direction by a magnetic flux generated by the coil to drive the spool to one end in the axial direction;
A coil spring which is set on one end side in the axial direction of the spool inside the sleeve and biases the spool toward the other end side in the axial direction;
A support member disposed on one end side in the axial direction of the coil spring inside the sleeve and supporting one end in the axial direction of the coil spring;
The support member has an annular base and a cylindrical protrusion that protrudes from the base to the other axial end so as to surround the inner peripheral edge of the base and fits to the inner circumference of the coil spring at one axial end. And
Furthermore, in the support member, a notch reaching from the inner peripheral edge to the outer peripheral edge in the base portion and a notch reaching from the inner peripheral surface to the outer peripheral surface in the projecting portion are provided continuously in the axial direction,
If the two cuts provided in a row are collectively defined as a first cut, the support member has elasticity in the circumferential direction due to the first cut. The solenoid valve according to claim 1,
One end of the spool in the axial direction is provided with a recess that opens to one end in the axial direction.
The other end of the coil spring in the axial direction is fitted inside the recess. The solenoid valve according to claim 1,
One end of the spool in the axial direction is provided with a convex portion that protrudes toward one end in the axial direction.
The convex portion is fitted to the inner circumference on the other axial end side of the coil spring. In the solenoid valve according to any one of claims 1 to 3,
The electromagnetic valve according to claim 1, wherein a protrusion for hooking the coil spring is provided on the protrusion. In the solenoid valve according to any one of claims 1 to 4,
Aside from the first cut, a cut that extends from the inner periphery to the outer periphery without reaching the outer periphery in the base portion and a cut that reaches the outer peripheral surface from the inner peripheral surface in the projecting portion are provided continuously in the axial direction,
Separately from the first cut, if the two cuts provided in a row are defined together as a second cut,
An electromagnetic valve characterized in that two or more second cuts are provided.

Images