JP6218878B2 - Solenoid valve and method of manufacturing the solenoid valve - Google Patents

Description

  The present invention relates to an electromagnetic valve used in, for example, a valve timing control device for an internal combustion engine and a method for manufacturing the electromagnetic valve.

  As this type of conventional solenoid valve, for example, one described in Patent Document 1 below is known.

  This solenoid valve is provided in a cylinder head of an internal combustion engine, and is used for supply / discharge control of hydraulic oil by switching a flow path of a hydraulic circuit to a valve timing control device. As a structure, it is formed in a substantially bottomed cylindrical shape, and includes a valve body in which a spool valve body is slidably accommodated, and an electromagnetic solenoid fixed to one axial end of the valve body. .

  The electromagnetic solenoid includes a casing that is a cylindrical magnetic body, a coil that is housed and disposed inside the casing, two fixed iron cores that are provided at the front and rear ends in the axial direction of the casing, and an inner periphery of the coil. A substantially columnar movable iron core slidably provided in a cylindrical member formed thereon, and a nonmagnetic magnet provided on the front end side of the movable iron core to press the spool valve body against the spring force of a return spring It is mainly composed of a body drive shaft.

  In the casing, a plurality of claw portions are integrally provided on the front end side of the body portion whose front and rear ends are open, and each claw portion is bent inward at the time of assembling each constituent member. The fixed iron core is fixed.

JP 2010-71359 A

  However, in the conventional solenoid valve, the width of each claw portion of the casing is formed in a substantially uniform rectangular shape from the root portion to the tip portion, and the bending point of the claw portion during caulking becomes the root portion. ing. Since this root portion is in the vicinity of the height of the fixed iron core, bending is difficult.

  That is, each claw portion has a relatively large width to increase the overall rigidity. Since the bending point at the time of caulking is near the height of the fixed iron core, the force at the time of caulking acts on the edge of the fixed iron core, which is the bending point, to disperse inward in the direction perpendicular to the axis. Will be. As a result, not only a sufficient caulking force can be obtained, but the deformation amount of the edge of the fixed iron core may increase.

  The present invention has been devised in view of the technical problem of the prior art, and an object thereof is to provide an electromagnetic valve capable of suppressing deformation of a fixed iron core while sufficiently securing a caulking tightening force.

According to the first aspect of the present invention, a plurality of wide end portions having a width along the circumferential direction of the casing are provided at a predetermined interval position in the circumferential direction at one end in the axial direction of the cylindrical casing. A claw portion that is provided integrally at the tip and has a narrow width portion that is narrower than the wide width portion along the circumferential direction of the casing; and the casing by the claw portion in a state where the narrow width portion is bent inward. And a valve body fixed to
An inclined surface is formed on the outer edge of the tip of all the narrow portions,
The narrow width portion is formed at substantially the center in the circumferential direction of the widened portion, and stepped shoulders are formed on both sides of the joint portion of the narrow width portion with the widened portion. It is a feature.

  According to the present invention, when the narrow portion is caulked, the pressing force due to the caulking acts inward via the inclined surface formed at the distal end portion of the narrow portion. It can be bent and deformed stably and easily.

It is a principal part enlarged view of the solenoid valve which concerns on 1st Embodiment of this invention. It is the schematic of the valve timing control apparatus with which this embodiment is applied. It is a disassembled perspective view which shows the electromagnetic solenoid provided to the solenoid valve of this embodiment. It is a perspective view which shows the solenoid valve of this embodiment. It is a side view which shows the solenoid valve of this embodiment. It is A arrow directional view of FIG. A is a principal part sectional view showing a state before the caulking work is performed using the claw part in the present embodiment, and B is a principal part sectional view showing a state where the caulking work is performed.

  Hereinafter, embodiments of a solenoid valve according to the present invention will be described in detail with reference to the drawings.

  The first embodiment is applied to a valve timing control device for a vane type internal combustion engine.

  An outline of the valve timing control device will be described with reference to FIG. 2. A timing sprocket 1 that is rotationally driven via a timing chain by a crankshaft outside the engine of the engine, and a rotatable relative to the timing sprocket 1. A camshaft 2 provided, a phase conversion mechanism 3 disposed between the sprocket 1 and the camshaft 2 for converting the relative rotational positions of the two, and a hydraulic circuit 4 for operating the phase conversion mechanism 3; It is equipped with.

  The camshaft 2 is rotatably supported by a cylinder head (not shown) via a cam bearing, and a plurality of drive cams for opening the intake valve via a valve lifter are integrally provided at a predetermined position on the outer peripheral surface. Yes.

  The phase conversion mechanism 3 includes a cylindrical housing 5 that is integrally provided on the inner peripheral side of the sprocket 1, and is fixed to one end of the camshaft 2 from the axial direction by a cam bolt so as to be rotatable in the housing 5. Each of four retard oil chambers 9 defined by a vane member 6 accommodated in the housing 5, four shoes 7 integrally formed on the inner periphery of the housing 5, and four vanes 8 of the vane member 6. The advance oil chamber 10 is provided.

  The housing 5 includes a front plate and a rear plate (not shown) that close the front and rear opening ends, and these are integrally joined together by four bolts 11 from the axial direction by tightening together.

  Each of the shoes 7 has a substantially trapezoidal side surface, and a substantially U-shaped seal member 12 is fitted in a seal groove formed along the axial direction at each tip portion.

  The vane member 6 is integrally formed of a metal material, and the vane rotor 6a fixed to one end portion of the camshaft 2 from the axial direction by the cam bolt 13 inserted through the insertion hole formed in the center from the axial direction, and the vane rotor 6a, and 4 vanes 8 projecting radially at substantially equal intervals in the circumferential direction of the outer peripheral surface of 6a.

  The vane rotor 6a is rotatably supported while sliding on a seal member 12 fitted to the top surface of the tip of each shoe 7, and communicates with each retarded oil chamber 9 in the inner radial direction. Four retard angle oil holes and four advance angle oil holes (not shown) communicating with each advance oil chamber 10 are formed.

  Each of the vanes 8 is disposed between the shoes 7 and has a substantially U-shaped seal member that is in sliding contact with the inner peripheral surface of the housing 5 in a seal groove that is formed in the axial direction on each tip surface. 14 is fitted. Further, between the maximum width vane 8 and the rear plate, there is provided a lock mechanism 15 for restraining free rotation of the vane member 6 on the most retarded angle side shown in FIG.

  As shown in FIG. 2, the hydraulic circuit 4 includes first and second hydraulic passages 16 that communicate with the retard and advance oil chambers 9 and 10 through the retard-side passages and the advance-side passages. 17, an oil pump 19 for supplying the hydraulic oil in the oil pan 18 into the oil chambers 9 and 10 through the hydraulic passages 16 and 17, and a downstream side of the oil pump 19. The hydraulic passages 16 and 17 are constituted by an electromagnetic valve 22 that selectively switches between the pump discharge passage 20 and the drain passage 21 by a control signal from the controller 23.

  2 to 6, the electromagnetic valve 22 is a direction switching valve that switches the flow path between on and off, and is inserted and fixed inside a valve housing hole formed in a cylinder head (not shown). A cylindrical valve body 36, an electromagnetic solenoid 37 provided on one end side of the valve body 36, and a valve body 36 movably accommodated (slidable) in the axial direction. And a spool valve body 38 that is pressed and moved to the electromagnetic solenoid 37 side by an armature 45 that is a movable iron core to be described later.

  The valve body 36 is formed with a valve hole 36a for accommodating the spool valve body 38 therein, and a supply port 36b opened from the valve hole 36a is formed in the radial direction at a substantially central position of the peripheral wall. Yes. Further, first and second output ports 36c and 36d that open to the valve hole 36a and communicate independently with the hydraulic passages 16 and 17, respectively, are formed in both radial positions of the supply port 36b from the radial direction. In addition, a drain port 36e communicating with the inside of the oil pan 18 through the drain passage 21 is formed along the radial direction at a side position of the first output port 36c. In addition, annular filters 24a to 24c for filtering dust, contamination, and the like are provided on the outer periphery of each port.

  The valve body 36 has a seal ring 25 that is fitted and fixed to the outer periphery of the base end portion 39 on the electromagnetic solenoid 37 side, and is fitted to the distal end side of the base end portion 39. Is fitted and fixed with a seal ring 26 for sealing between the casing 40 to be described later.

  Further, as shown in FIG. 1, the valve body 36 is integrally provided with a flange-like flange portion 39a that abuts on a first fixed yoke 42 (to be described later) in the axial direction on the end edge side of the base end portion 39 on the electromagnetic solenoid 37 side. In addition, an annular locking groove 39b is formed on the side portion of the flange portion 39a to lock a narrow portion 47b of the first claw portion 47 described later by caulking. Note that a breathing hole 36f is formed in the bottom wall of the valve body 36 to ensure good slidability of the spool valve body 38.

  The spool valve body 38 is integrally formed of a metal material, and as shown in FIGS. 1 and 3, the supply port 36a and the first and second output ports 36b, 36c, Two cylindrical first and second land portions 38b and 38c that selectively open and close the drain ports 36d and 36e according to their movement positions are integrally formed at a predetermined interval.

  As shown in FIG. 3, the electromagnetic solenoid 37 includes a substantially cylindrical casing 40 made of a magnetic material, a cylindrical electromagnetic coil 41 disposed on the inner periphery of the casing 40, and front and rear opening ends of the casing 40. First and second fixed yokes 42 and 43, which are two fixed iron cores that are caulked and fixed and extinguished and excited by an electromagnetic coil 41, and a cylindrical yoke 44 disposed and fixed between the fixed yokes 42 and 43. The armature 45 is slidably accommodated in the axial direction and the non-magnetic shaft 46 is slidably provided in the shaft hole of the first fixed yoke 42.

  The casing 40 is formed by rolling a plate-like magnetic material into a cylindrical shape, and two fitting recesses 40c corresponding to two circular fitting projections 40b formed at opposite ends in the circumferential direction thereof. Thus, a body portion 40a is formed in which the front and rear ends are opened.

  In addition, four first and second claw portions 47 and 48 for caulking and fixing the first and second fixing yokes 42 and 43 are integrally projected at the front opening end and the rear opening end of the body portion 40a. It is installed.

  As shown in FIGS. 1 and 3 to 6, the first and second claw portions 47 and 48 are each formed in a convex shape from the front and rear end edges of the body portion 40 a, and are arranged in the circumferential direction 180 of each opening end. A pair is formed at the left and right positions and extends along the axial direction of the body 40a. Each of the convex claw portions 47 and 48 includes a rectangular wide portion 47a and 48a on the body portion 40a side, and a narrow portion integrally formed at a substantially central position of the leading edge of the wide portion 47a and 48a. 47b and 48b, and stepped portions 47c and 48c which are shoulder portions formed between the wide portions 47a and 48a and the narrow portions 47b and 48b.

  The narrow width portions 47b and 48b have a width length W1 set to about 1/3 of the width length W of the wide width portions 47a and 48a, and the wide width portions 47a and 48a are larger than the narrow width portions 47b and 48b. The rigidity is high. In other words, the wide steps 47a and 48a having high rigidity and the narrow portions 47b and 48b having low rigidity are divided around the steps 47c and 48c. Therefore, at the time of caulking, the positions of the steps 47c and 48c are bent and formed inside. Tapered surfaces 47e and 48e are formed on the outer end edges of the tip portions 47d and 48d of the narrow width portions 47b and 48b.

  As shown in FIGS. 1 and 3, each step 47 c on the valve body 36 side is located on the locking groove 39 b side of the flange portion 39 a of the base end portion 39 of the valve body 36 when the casing 40 or the like is assembled. It is formed at substantially the same position as the end edge 39c. On the other hand, each step 48 c on the rear end side is formed at substantially the same position as an outer end edge of a notch groove 43 c described later of the second fixed yoke 43.

  A bracket 49 for fixing to the cylinder head is fixed to the outer surface of the body 40a.

  As shown in FIG. 3, the first fixed yoke 42 and the second fixed yoke 43 are disc-shaped flange portions 42a and 43a, and the center positions of the inner surfaces of the flange portions 42a and 43a that face each other in the axial direction. And four arc-shaped cutout grooves 42c and 43c are formed at positions of approximately 180 ° in the circumferential direction of the flange portions 42a and 43a, respectively. The first fixed yoke 42 is formed with a shaft insertion hole 42d that is continuous with the insertion hole in the cylindrical portion 42b at the center position of the flange portion 42a. The flange portions 42a and 43a are set to have substantially the same outer diameter as the body portion 40a, and the cutout grooves 42c and 43c are slightly smaller than the widths of the widened portions 47a and 48a of the claw portions 47 and 48, respectively. It is set large and each widened part 47a, 48a can be fitted. The outer diameter of the flange portion 39a of the valve body base end portion 39 is set smaller than the outer diameter of the flange portion 43a by the thickness of each claw portion 47.

  A seal member 27 is interposed between the outer peripheral portion of the flange portion 42 a of the first fixed yoke 42 and the front end flange 44 a of the cylindrical yoke 44.

  The electromagnetic coil 41 is energized or de-energized on and off from the electronic controller 23 electrically connected to a terminal in a connector 41a provided on the outer periphery.

  The armature 45 is formed in a substantially cylindrical shape and moves forward when the electromagnetic coils 41 are energized and the yokes 42, 43, 44 are excited.

  A compression coil spring 50 that urges the spool valve body 38 in the left direction in FIG. 2, that is, in the direction opposite to the moving direction of the excited armature 45, between the tip wall of the valve body 36 and the spool valve body 38. Is provided.

  The shaft 46 is made of a non-magnetic material, and has a proximal end abutting against the distal end of the armature 45, while a distal end abuts against one end of the spool valve body 38, the movement of the armature 45, the compression coil spring 50, and the like. It moves in the axial direction by relative pressure.

  Hereinafter, the operation of the valve timing control device will be briefly described. When the engine is started and when the engine is idling, the controller 23 is de-energized from the controller 23 in a predetermined low speed range. . Accordingly, the spool valve body 38 is held at the maximum leftward position shown in FIG. 1 by the spring force of the compression coil spring 50, and at the same time the first land portion 38b communicates the supply port 36b and the second output port 36d. The second land portion 38c blocks communication between the supply port 36b and the first output port 36c, and connects the first output port 36c and the drain port 36e.

  Therefore, the hydraulic oil pumped from the oil pump 31 is supplied from the first hydraulic passage 16 to each retarded oil chamber 9, while the hydraulic oil in each advanced oil chamber 10 is drained from the second hydraulic passage 17. The oil is returned to the oil pan 35 through the port 36 f and the drain passage 29.

  For this reason, the vane member 6 is held at the maximum left rotation position shown in FIG. 2, and the relative rotation phase of the timing sprocket 1 and the camshaft 2 is controlled to the most retarded angle side. As a result, the startability of the engine is improved and a stable rotation of the engine during idling is obtained.

  When the engine shifts from the low rotation range to the middle rotation range, which is a steady operation range, an ON signal is output from the controller 23 to the electromagnetic valve 22 and energized, and the armature 45 is excited. Therefore, the armature 45 moves to the maximum in the right direction from the position shown in FIG. 2 against the spring force of the compression coil spring 50, and moves the spool valve body 38 in the same direction.

  Therefore, the land portions 38b and 38c of the spool valve body 38 allow the supply port 36b and the first output port 36c to communicate with each other and simultaneously block the communication with the drain port 36f. On the other hand, the communication between the supply port 36b and the second output port 36d is cut off, and at the same time, the second output port 36d and the drain port 36e are connected.

  Therefore, the hydraulic pressure pumped from the oil pump 31 is supplied from the second hydraulic passage 17 into each advance oil chamber 10 to increase the internal pressure, and the hydraulic pressure in each retard oil chamber 9 is changed to the oil pan 18. It is discharged inside and the inside becomes low pressure. Thereby, the vane member 6 rotates rightward from the position of FIG. 2, and the relative rotational phase of the timing sprocket 1 and the camshaft 2 is converted to the advance side. As a result, the opening / closing timing of the intake valve is advanced, the engine combustibility is improved during the steady operation, and fuel consumption and output can be improved.

  Further, when the engine shifts to a high rotation range, an off signal is output from the controller 23 to the electromagnetic solenoid 37 and the power is turned off. For this reason, the armature 45 has a large driving force as it moves to the left as shown in FIG. 2 due to the spring force of the compression coil spring 50, and the spool valve body 38 is connected to the supply port 36b as described above. While communicating with the second output port 36d, the first output port 36c and the drain port 36f are communicated.

  As a result, the hydraulic pressure is supplied to each retarded oil chamber 9 and becomes high pressure, while the hydraulic pressure in each advanced oil chamber 10 is discharged into the oil pan 35 and becomes low pressure. However, it rotates to the maximum left as shown in FIG. 2 to control the relative rotational phase of the timing sprocket 1 and the camshaft 2 to the retard side. As a result, the opening / closing timing of the intake valve is retarded, and the engine output in such a high rotation / high load region can be improved.

  In this embodiment, when the valve body 36 is caulked and fixed to the casing 40 via the first fixed yoke 42, the electromagnetic coil 41, the cylindrical yoke 44, the armature 45, After the shaft 46 and the like are accommodated, the first fixed yoke 42 is accommodated in the opening on the front side, and the widened portion 47a of each claw portion 47 is accommodated in each notch groove 42c.

  Subsequently, as shown in FIG. 7A, the front end surface of the flange portion 42a of the first fixed yoke 42 is brought into contact with the claw portions 47 while the opposed end surface of the base end portion 39 of the valve body 36 is abutted from the axial direction. The base end portion 39 is disposed on the surface. At this time, the level difference 47c of each claw portion 47 is opposed to the hole edge of the flange portion 39a, and the narrow width portion 47b is positioned outside the locking groove 39b.

  Thereafter, as shown in FIG. 7B, when the front end portion 47d of the narrow portion 47b of each claw portion 47 is pressed from the axial direction by the caulking punch 51, the pressing force acts inward through the respective tapered surfaces 47e. Accordingly, the narrow width portion 47b having a small rigidity is bent and deformed inward from the vicinity of the step 47c on the base side. Accordingly, each narrow width portion 47b has a tightening force due to the entire inner surface being in pressure contact with the inner surface of the locking groove 39b, that is, the outer surface of the flange portion 39a, while the distal end portion 47d is engaged with the locking groove 39b. Works. By this caulking force, the valve body 37 is firmly fixed to the casing 40 from the axial direction.

  As described above, when the front end portion 47d of each narrow width portion 47b is pressed by the caulking punch 51, the widened portion 47a having high rigidity has the inner surface that is the bottom surface of the notch groove 42c of the first fixed yoke 42 and the flange portion 39a. It becomes a form which supports the deformation | transformation to the inside from the base of each narrow part 47b, without deform | transforming, contact | abutting to the outer surface.

  As a result, in the vicinity of the step 47c that is the bending point of the narrow width portion 47b, strong force does not act on the edge of the flange portion 39a, and the caulking force is concentrated on the inner surface of the flange portion 39a in the entire narrow width portion 47b. Act on. As a result, a sufficient caulking tightening force can be obtained, and deformation of the edge of the first fixed yoke 42 can be suppressed.

  The caulking action on the first claw portion 47 side has been described above, but the caulking action on the second fixed yoke 43 is the same on the second claw portion 48 side even though the valve body 36 does not exist.

  In the present embodiment, the narrow width portion 47b has the same width from the base to the tip, but the width can be changed. For example, the step 47c and the narrow portion 47b can be continued in an arc shape.

  As described above, the level difference is not a portion where the rigidity changes continuously with respect to the widened portion 47a, but a portion where there is a stepwise change in rigidity that only deforms the narrowed portion 47b with respect to the widened portion 47a. That is.

  The electromagnetic valve of the present invention is not limited to the configuration of each of the above embodiments, and the application object is not limited to the valve timing control device and valve lift control device of an internal combustion engine, but also the hydraulic control and flow of other equipment. It can be applied to path switching control.

  Furthermore, the specification of the solenoid valve can be a multistage type in addition to the proportional control type, the on / off type, and the like.

The technical idea of the invention grasped from the embodiment will be described below.
[Claim a]
A coil wound in a ring;
A casing that surrounds the outer peripheral side of the coil and has a barrel portion that is open at least at one end in the axial direction and a plurality of claw portions that are integrally formed at the open end of the barrel portion;
A movable iron core disposed on the inner circumference of the coil so as to be movable in the axial direction;
A fixed iron core disposed on the open end side of the casing;
A hollow valve body fixed to the open end of the casing together with the fixed iron core by bending the claw portion inwardly;
A spool valve element that moves in the axial direction in the valve body as the movable iron core moves in the axial direction;
With
The claw part includes a widened part formed on the root side, and a narrowed part formed on the tip side of the widened part via a stepped part,
The stepped portion is positioned at the same position as the outer edge of the one end of the valve body that abuts the fixed iron core from the axial direction or on the body side of the outer edge of the one end of the valve body. Solenoid valve characterized by.
[Claim b]
A coil wound in a ring;
A casing that surrounds the outer peripheral side of the coil, and has a trunk portion that is open at one end in the axial direction, and a plurality of claw portions that are integrally formed at the open end of the trunk portion;
A movable iron core disposed on the inner circumference of the coil so as to be movable in the axial direction;
A fixed iron core disposed at least at an open end of the casing;
A hollow valve body fixed to the open end of the casing together with the fixed iron core by bending the claw portion inwardly;
A spool valve element that moves in the axial direction in the valve body as the movable iron core moves in the axial direction;
With
The solenoid valve according to claim 1, wherein the claw portion has a structure in which a predetermined position between the root portion side and the outer end edge in the axial direction of the valve body is easily bent and deformed to the inside of the root portion.
[Claim c]
A fixing structure for fixing the second member to the first member by caulking and deforming the tip portions of the plurality of claws provided on the first member to the second member,
The fixing structure is characterized in that the rigidity of the claw portion is formed so that the predetermined position on the tip side is smaller than the root portion.
[Claim d]
The solenoid valve according to claim 1,
The casing is formed by rolling plate members into a cylindrical shape, and is configured by joining ends facing each other in the circumferential direction.

According to this invention, the molding operation of the casing is facilitated.
(Claim e) In the solenoid valve according to claim 1,
The solenoid valve according to claim 1, wherein the casing is made of a magnetic material.

DESCRIPTION OF SYMBOLS 1 ... Timing sprocket 2 ... Cam shaft 3 ... Phase conversion mechanism 4 ... Hydraulic circuit 6 ... Vane member 9 ... Retarded oil chamber 10 ... Advance oil chamber 16/17 ... Hydraulic passage 19 ... Oil pump 22 ... Solenoid valve 23 ... Electron Controller 36 ... Valve body 36a ... Supply port 36b / 36c ... First and second output ports 37 ... Electromagnetic solenoid 38 ... Spool valve 38a ... Valve shaft 38b, 38c ... First, second land portion 39 ... Base end of valve body Part 39a ... Flange part 39b ... Groove for engagement 40 ... Casing 40a ... Body part 41 ... Electromagnetic coils 42, 43 ... First and second fixed yokes (fixed iron cores)
47, 48 ... first and second claw portions 47a, 48a ... first and second widened portions 47b, 48b ... first and second narrow portions 47c, 48c ... step 47e ... tapered surface (inclined surface)

Claims (4)

A plurality of circumferentially-spaced predetermined intervals at one end in the axial direction of the cylindrical casing, the casing having a widened portion having a width along the circumferential direction of the casing, and integrally provided at a tip of the widened portion. A claw portion having a narrow portion having a narrower width than the widened portion along the circumferential direction of
A valve body fixed to the casing by the claw in a state where the narrow portion is bent inward;
With
An inclined surface is formed on the outer edge of the tip of all the narrow portions,
The narrow width portion is formed at substantially the center in the circumferential direction of the widened portion, and stepped shoulders are formed on both sides of the joint portion of the narrow width portion with the widened portion. Characteristic solenoid valve. The electromagnetic valve according to claim 1,
The solenoid valve according to claim 1, wherein a width of the narrow portion is set to about 1/3 of a width of the wide portion . A coil wound in a ring;
A cylindrical casing that surrounds the outer peripheral side of the coil and has a body portion that is open at least at one end in the axial direction;
A plurality of circumferentially-spaced portions provided at a predetermined interval position in the circumferential direction at the open end of the body portion, and a circumferentially extending direction of the casing provided integrally with a widened portion having a width along the circumferential direction of the casing and the widened portion step having on both sides of the coupling portion between the Chi also narrower than the wide portion, the narrow portion formed substantially in the center of the circumferential direction of the wider section, the wider section of the narrow width portion along the A claw with a shoulder , and
A movable iron core disposed on the inner circumference of the coil so as to be movable in the axial direction;
A fixing having a disk-shaped flange portion disposed on the open end side of the casing, and a plurality of notch grooves formed on the outer peripheral side of the flange portion and into which the widened portions of the plurality of claw portions are respectively fitted. Iron core,
It has an annular portion that abuts the fixed iron core from the axial direction, and has an internal hollow shape fixed to the open end of the casing together with the fixed iron core in a state where the narrow width portion of the claw portion is bent inward. A valve body;
A spool valve that moves in the valve body in the axial direction by movement in the axial direction of the movable iron core;
An inclined surface formed on the outer edge of the tip of all the narrow portions;
A solenoid valve characterized by comprising: A coil wound in a ring;
A casing that surrounds the outer peripheral side of the coil and has a body portion that is open at least in one axial direction;
A plurality of circumferentially-spaced predetermined intervals are provided at the open end of the body portion, and a widened portion having a width along the circumferential direction of the casing, and integrally provided at the tip of the widened portion, are arranged in the circumferential direction of the casing. A step-like shape having a narrower width than the widened portion along the narrow portion formed at substantially the center in the circumferential direction of the widened portion and both sides of the joint portion of the narrowed portion with the widened portion. A claw with a shoulder , and
A movable iron core disposed on the inner circumference of the coil so as to be movable in the axial direction;
A cylindrical valve body provided via a fixed iron core disposed on the open end side of the casing;
A spool valve that moves in the valve body in the axial direction as the movable iron core moves in the axial direction;
An inclined surface formed on the outer edge of the tip of all the narrow portions;
A method of manufacturing a solenoid valve comprising:
The valve body is fixed from the axial direction to the casing by pressing the inclined surface of the claw portion extending in the axial direction of the casing from the axial direction with a caulking punch to deform the narrow portion inward. A method for manufacturing a solenoid valve.

Images