JP2013087873A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve which can suppress a defect like deformation which occurs at a fixed iron core when a plurality of pawl portions are bent.SOLUTION: In the solenoid valve configured by connecting a yoke 21 to a valve body 11 together with a first fixed iron core 23 by inwardly bending a plurality of first pawl portions 31 provided at one end in an axial direction of a body portion 30, concave portions 33, 33 are formed between roots and tips of the first pawl portions 31 by being cut from both sides of a circumferential direction of the body portion 30, and a narrow width portion 31a configured between the concave portions 33, 33 is provided either at a position in the same axial direction as an outer end edge 13a of a flange portion 13 of the valve body 11 which abuts on the first fixed iron core 23 from the axial direction or at a position in the axial direction closer to the body portion 30 than the outer end edge 13a of the flange portion 13.

Description

  The present invention relates to an electromagnetic valve that is applied to, for example, a valve timing control device for an internal combustion engine and serves to control fluid pressure.

  As a conventional electromagnetic valve, for example, one described in Patent Document 1 below has been proposed.

  In this solenoid valve, a movable iron core is disposed on the inner peripheral side of a coil accommodated in a cylindrical case made of a predetermined metal material, and a fixed iron core is disposed at each axial end of the case. And a solenoid configured by deforming (bending) a plurality of claw portions provided at each end portion of the case inwardly, so that the case and each fixed iron core Are supposed to be combined.

JP 2010-71359 A

  However, in the conventional solenoid valve, the inner surfaces of the plurality of claw portions are in contact with the outer edge of the fixed iron core, so that the respective claw portions are bent inward. For this reason, depending on the wall thickness and length of each of these claw parts, the input load set based on this, etc., each said claw part will come into strong contact (pressure contact) with the outer edge of the fixed iron core, As a result, there is a possibility that inconvenience such as deformation occurs in the fixed iron core.

  The present invention has been devised in view of such a technical problem, and provides an electromagnetic valve that can suppress inconveniences such as deformation occurring in a fixed iron core when bending a plurality of claw portions.

  The present invention provides an electromagnetic valve in which a case is coupled to a valve body together with a fixed iron core by bending a plurality of claw portions provided at one axial end of a body portion inward, and each claw portion The outer edge of the valve body is formed by notching a recess from both sides in the circumferential direction of the body portion between the root portion and the tip portion of the valve body and abutting the narrowest part between the both recesses in the axial direction with respect to the fixed iron core. It is characterized in that it is provided at the same axial position as or at an axial position closer to the body portion than the outer edge of the valve body.

  Moreover, the said recessed part is good also as providing in the inner surface of the said each nail | claw part besides the both sides of each said nail | claw part.

  According to the present invention, when an input is generated on the front end side of each claw portion, stress concentration occurs in the vicinity of the both concave portions in each claw portion, whereby the front end side of each claw portion is It becomes possible to easily incline inwardly with a narrow portion (fragile portion) formed between both concave portions as a bending point. As a result, adverse effects such as deformation caused by the input on the fixed iron core can be suppressed.

  Further, even when the concave portion is provided on the inner surface of each claw portion, stress concentration occurs in the concave portion based on an input to the front end side of each claw portion, and thereby, the configuration is based on the concave portion. It is possible to easily tilt the tip side of each claw portion with the thin-walled portion (fragile portion) as a bending point. As a result, as in the case where the concave portions are provided on both sides of each of the claw portions, it is possible to suppress adverse effects such as deformation that the input gives to the fixed iron core.

1 is a hydraulic pressure supply circuit diagram of a valve timing control device to which an electromagnetic valve according to the present invention is applied. It is a disassembled perspective view of the solenoid valve shown in FIG. It is a figure showing the assembly completion state of the solenoid valve shown in FIG. 2, Comprising: It is a perspective view of the solenoid valve shown in FIG. It is the arrow view which looked at the solenoid valve shown in FIG. 3 from the A direction. It is the arrow line view which looked at the solenoid valve shown in FIG. 3 from the B direction. It is a principal part enlarged view of the solenoid valve shown in FIG. 3 which concerns on 1st Embodiment of this invention. It is a figure which shows the assembly process of the solenoid valve which concerns on the embodiment, (a) is before the caulking of a case, (b) is the principal part expanded sectional view of the solenoid valve which each showed after caulking of a case. It is a principal part enlarged view of the solenoid valve which concerns on the modification of 1st Embodiment of this invention. It is a principal part enlarged view of the solenoid valve which concerns on 2nd Embodiment of this invention. It is sectional drawing which follows the CC line of FIG.

  Hereinafter, each embodiment of the electromagnetic valve according to the present invention will be described in detail with reference to the drawings. In the following embodiments, this solenoid valve is applied to a hydraulic valve timing control device of an internal combustion engine (engine) as in the conventional case.

  First, a hydraulic valve timing control apparatus to which the electromagnetic valve according to the present invention is applied will be described. As shown in FIG. 1, the valve timing control apparatus is connected to a crankshaft of an engine (not shown) via a timing chain. A timing sprocket 1 that is rotationally driven, a camshaft 2 that is rotatably provided with respect to the timing sprocket 1, and a camshaft 2 and the timing sprocket 1 that are interposed between the camshaft 2 and the timing sprocket 1. A phase change mechanism 3 that changes the relative phase of the pressure change mechanism 2, a hydraulic supply / discharge means 4 that supplies and discharges the hydraulic pressure of the phase change mechanism 3, and an electronic control unit 5 that controls the operation of the hydraulic supply / discharge means 4. I have.

  The phase conversion mechanism 3 is fixed to the cylindrical housing 6 integrally provided on the inner peripheral side of the timing sprocket 1 and one end of the camshaft 2 from the axial direction, and is rotatably accommodated in the housing 6. The vane rotor 7 is mainly composed of. That is, for example, four shoes 6a projecting on the inner peripheral side of the housing 6 and in sliding contact with the outer peripheral surface of the annular base portion 7b of the vane rotor 7, and corresponding to each shoe 6a projecting on the outer peripheral side of the vane rotor 7 The relative phase of the vane rotor 7 with respect to the housing 5 changes by supplying and discharging hydraulic pressure to and from the retard angle side oil chamber Pr and the advance angle side oil chamber Pa separated by the four vanes 7a. The relative phase of the camshaft 2 with respect to the sprocket 1 (the crankshaft) is changed. One of the vanes 7a is provided with a lock mechanism 3a that restrains the free rotation of the vane rotor 7 on the most retarded angle side, so that stabilization at the time of starting the engine or idling is achieved. ing.

  The hydraulic supply / discharge means 4 is a pump 9 which is a hydraulic supply source for pumping hydraulic oil stored in the oil pan 8, and the hydraulic oil pumped by the pump 9 in accordance with a control signal from the electronic control unit 5. The electromagnetic valve SV which is a flow path switching valve for supplying the other hydraulic oil to the oil pan 8 and supplying the other hydraulic oil to one of the retard chamber Pr and the advance chamber Pa, and the electromagnetic valve SV and the oil pan 8 and the retard chamber. The oil passage L mainly communicates with the Pr and the advance chamber Pa.

  The oil passage L communicates a later-described retardation port P1 of the solenoid valve SV with a retardation chamber Pr of the phase change mechanism 3, and a retardation passage L1 that supplies and discharges hydraulic oil to and from the retardation chamber Pr. An advance port L2 for connecting the later-described advance port P2 of the solenoid valve SV and the advance chamber Pa of the phase change mechanism 3, and an advance passage L2 for supplying and discharging hydraulic oil to and from the advance chamber Pa; The suction passage L0 that communicates with the suction port of the pump 9 and the discharge port of the pump 9 and an introduction port P3, which will be described later, of the solenoid valve SV communicate with each other, and the hydraulic oil discharged by the pump 9 is directed to the phase changing mechanism 3 side. An introduction passage L3 for guiding, and a drain passage L4 that communicates a later-described discharge port P4 of the solenoid valve SV and the oil pan 8, and returns the hydraulic oil discharged from the discharge port P4 to the oil pan 8, The solenoid valve SV leads to the retard passage L1 and the advance passage L2. A passage L3 and drain passage L4 is adapted to be selectively switched.

  The solenoid valve SV is a so-called slide spool type four-port proportional electromagnetic switching valve. As shown in FIGS. 1 to 6, the axial direction of the spool 12 accommodated in the valve body 11 so as to be movable in the axial direction. A spool valve 10 that switches communication states of ports P1 to P4 (described later) provided in the valve body 11 according to the position, and an electromagnetic force that is coupled to the spool valve 10 and is generated based on a control current from the electronic control unit 5 And the electromagnetic solenoid 20 that drives the spool 12 via the movable iron core 25, and is attached and fixed to the engine via a bracket 21c provided on the outer periphery of a yoke 21 described later.

  The spool valve 10 is almost entirely inserted into a cylinder head (not shown), and has a valve body 22 having ports P1 to P4 to be described later connected to the passages L1 to L4. And a spool 23 that is slidably housed and switches the communication state of the ports P1 to P4 according to the axial position thereof.

  The valve body 11 is formed in a substantially cylindrical shape by a non-magnetic metal material such as aluminum, for example, and through a flange portion 13 whose diameter is increased at one end portion (the left end portion in FIG. 1), The electromagnetic solenoid 20 is coupled to one end portion of the electromagnetic solenoid 20 by a plurality of first claw portions 31 provided at one end portion (right end portion in FIG. 1) of a yoke 21 described later. More specifically, an annular locking groove 14 that receives the tip end portion (second widened portion 31c described later) of each first claw portion 31 at one end portion of the valve body 11 that contacts the first fixed iron core 23. Is formed along the circumferential direction, and the locking groove 14 is formed to form the flange portion 13, and the first claw portion 31 is formed on the outer edge 13 a of the flange portion 13. The valve body 11 is caulked and fixed to the yoke 21 together with the first fixed iron core 23 by the respective leading end portions of the valve body 11 being locked.

  A spool housing chamber 15 for slidably housing the spool 12 is provided along the axial direction on the inner peripheral side of the valve body 11, and a retard angle connected to the retard passage L1 is provided on the peripheral wall. The port P1, the advance port P2 connected to the advance passage L2, and the introduction port P3 connected to the introduction passage L3 are formed with a certain axial width along the circumferential direction, respectively. A discharge port P4 connected to the discharge passage L4 is formed penetrating along the axial direction. Each of the ports P1 to P3 is provided with filters F1 to F3 for suppressing entry of foreign matters.

  The spool 12 has two large-diameter first and second lands that selectively switch the communication state between the advance and retard ports P1 and P2 and the introduction and discharge ports P3 and P4 according to their axial positions. The portions 12a and 12b are slidably accommodated in the spool accommodating chamber 15. At this time, a coil spring 16 is elastically mounted between the spool 12 and the other end wall of the valve body 11, and the coil spring 16 is always urged toward the first fixed iron core 23 side. It has become. As a result, the spool 12 is positioned at the left end of the spool housing chamber 15 in FIG. 1 when the electromagnetic solenoid 20 is not energized, and the electromagnetic solenoid 20 is energized to resist the urging force of the coil spring 16. Thus, the spool accommodating chamber 15 moves in the axial direction to the right side in FIG.

  More specifically, when the electromagnetic solenoid 20 is in a non-energized state, the spool 12 is positioned at the left end in FIG. 1 so that the annular passage is formed on the outer periphery of the reduced diameter portion between the land portions 12a and 12b. The retard port P1 and the introduction port P3 communicate with each other through the port 17, and the advance port P2 and the discharge port P4 communicate with each other through the oil passage 18 drilled in the spool 12. On the other hand, when the electromagnetic solenoid 20 is energized and the spool 12 moves to the right end in FIG. 1, the advance port P2 and the introduction port P3 communicate with each other via the annular passage 17 and the retard angle via the oil passage 18. The port P1 and the discharge port P2 communicate with each other.

  The electromagnetic solenoid 20 includes a yoke 21 corresponding to the case of the present invention formed in a substantially cylindrical shape by a magnetic material, and is accommodated on the inner peripheral side of the yoke 21, and a coil 22b is wound around the outer periphery of the bobbin 22a. The coil unit 22 is fixed to each end in the axial direction of the yoke 21 via the flanges 23b and 24b at one end thereof, and the cylindrical parts 23a and 24a on the other end are connected to the inside of the coil unit 22. A first fixed iron core 23 and a second fixed iron core 24 made of a magnetic material housed on the circumferential side and arranged to face each other, and a magnetic material slidably housed on the inner circumferential side of the second fixed iron core 24 The movable iron core 25 made of a body and the first fixed iron core 23 are accommodated on the inner peripheral side, and one end surface thereof abuts on the other end surface of the spool 12 and the other end surface abuts on one end surface of the movable iron core 25. A rod 26 made of a non-magnetic body provided in earthenware pots, and a.

  The yoke 21 is formed in a cylindrical shape that surrounds the outer periphery of the coil unit 22 by rounding a plate-like magnetic metal material and joining opposite circumferential ends thereof. Specifically, by fitting a fitting convex portion 21a projecting at one end in the circumferential direction into a fitting concave portion 21b formed in a notch at the other end portion, the trunk portion 30 having both axial ends opened. Is configured. In this way, by configuring the yoke 21 by rounding the plate material and joining the both ends in the circumferential direction, it is possible to ensure good productivity of the yoke 21. Furthermore, a plurality of (four in the present embodiment) first claw portions 31 and second claw portions 32 are provided at each end in the axial direction of the yoke 12 at predetermined intervals in the circumferential direction. The first claw portion 31 is locked to the outer edge 13a of the flange portion 13 of the valve body 11, and the second claw portion 32 is locked to the outer edge of the flange portion 24b of the second fixed iron core 24. Caulking is fixed so as to be.

  The first and second claw portions 31 and 32 are extended in a convex shape along the axial direction of the trunk portion 30 at each end in the axial direction of the trunk portion 30, and are approximately 0 ° and 180 ° in the circumferential direction. They are arranged in pairs near each position of °. Further, the first claw portion 31 has a thickness at substantially the middle position in the longitudinal direction, specifically, on both sides of the axial position where it overlaps with the outer edge 13a of the flange portion 13 of the valve body 11 when the solenoid valve SV is assembled. A narrow portion 31a formed by providing a pair of recesses 33 and 33 that are notched so that the cross section is arcuate (semicircle) along the width direction, and sandwiching the narrow portion 31a The first widened portion 31b on the base portion (body portion 30) side and the second widened portion 31c on the distal end side are provided on both sides in the longitudinal direction. On the other hand, unlike the first claw portion 31, the second claw portion 32 is not provided with the concave portions 33, 33, and has a substantially constant width.

  The narrow width portion 31a is set so that the width dimension W1 of the narrowest portion is about 2/3 of the width dimension W2 of the wide width portions 31b and 31c. It is comprised so that the rigidity of 31a may become the lowest. Accordingly, when the first claw portion 31 is caulked when the yoke 21 is fixed to the valve body 11, the second widened portion 31c is bent inward with the narrow portion 31a as a bending point.

  In addition, the second widened portion 31c is provided with a pair of chamfered portions 34, 34 that gradually reduce the width dimension W2 toward the distal end on both sides of the distal end, and also on the outer end of the distal end. A chamfered portion 35 that gradually reduces the thickness width toward the distal end side is provided over the entire width direction.

  The first and second fixed iron cores 23 and 24 are formed in a substantially cylindrical shape by a magnetic metal material such as iron, for example, and are arranged so as to face each other, and are respectively accommodated on the inner peripheral side of the coil unit 22. Cylindrical portions 23a, 24a, and flange portions 23b, 24b provided on the outer end portions of the cylindrical portions 23a, 24a so as to have stepped diameters, respectively. The first fixed iron core 23 is fixed in a clamped state by the bobbin 22a and the valve body 11 via the flange portion 23b by caulking the first claw portion 31 of the yoke 21, and is attached to the peripheral wall of the yoke 21. Magnetically coupled. On the other hand, the second fixed iron core 24 is also fixed together with the bobbin 22a via the flange portion 24b by caulking the second claw portion 32 of the yoke 21, and is magnetically coupled to the peripheral wall of the yoke 21. Has been.

  Specifically, the flange portions 23b and 24b of the first and second fixed iron cores 23 and 24 are set to have substantially the same outer diameter as that of the body portion 30, and the flange portions 23b and 24b have first, Corresponding to the second claw portions 31 and 32, there are provided notched grooves 27 and 28 having four arcuate shapes in a biased manner in the vicinity of positions in the circumferential direction of approximately 0 ° and 180 °. Yes. The notch grooves 27 and 28 have a circumferential width W3 that is slightly larger than the width dimension of the claw portions 31 and 32 (the width dimension of the first widened portion 31b for the first claw portion 31) W2. And the depth width D is set to be substantially the same as the thickness width T of the claw portions 31 and 32, so that the notch grooves 27 and 28 are formed in the flange portion 13 of the valve body 11. The claw portions 31 and 32 can be fitted in the cutout grooves 27 and 28, respectively.

  The coil unit 22 is formed by winding a coil 22b around an outer periphery of a bobbin 22a formed in a substantially cylindrical shape by a resin material, and a resin connector 22c fixed to the other end of the yoke 21 and a coil connector 22c. The electronic control unit 5 is connected via a harness (not shown) to be connected. By supplying power from the electronic control unit 5, a magnetic path is formed by the yoke 21, the first and second fixed iron cores 23 and 24, and the movable iron core 25, and between the first fixed iron core 23 and the movable iron core 25. A magnetic attractive force will be generated.

  Here, the electronic control unit 5 detects the engine operating state based on signals from various sensors such as a crank angle sensor for detecting the rotational speed of the engine and an air flow meter for detecting the intake air amount. Switching the ports P1 to P4 as described above (switching the oil passage L) is performed by supplying a control current to the coil 22 of the solenoid valve SV or cutting it off according to the state.

  The movable iron core 25 is formed in a substantially cylindrical shape having an outer diameter slightly smaller than the inner diameter of the second fixed iron core 24 using, for example, a magnetic metal material such as iron. A so-called air gap (main gap) is formed between the inner periphery of the portion 24 a and a concave portion 23 c that is substantially coaxially disposed through a cap 29 made of a nonmagnetic material and is drilled at the tip of the first fixed iron core 23. It has come to be. Further, a so-called breathing hole 25a set to a predetermined inner diameter is formed in the inner peripheral portion of the movable iron core 25 along the axial direction of the movable iron core 25, and fills the main gap through the breathing hole 25a. The axial movement of the movable iron core 25 in the working oil is secured by letting the working oil escape to the second fixed iron core 24 side. That is, the movable iron core 25 is movable relative to the second fixed iron core 24 on the inner peripheral side of the second fixed iron core 24 so as to be guided by the peripheral wall. By attracting the first fixed iron core 23 to the first fixed iron core 23 side by the magnetic flux formed in the first fixed iron core 23, one end thereof (the right end in FIG. 1) contacts the inner surface of the recess 23c of the first fixed iron core 23. It moves in the axial direction within the range until contact.

  The rod 26 is formed in a bottomed cylindrical shape that is opened to the side of the movable iron core 25 by a nonmagnetic material such as stainless steel or aluminum, and the pressing force from the spool 12 based on the biasing force of the coil spring 16. And move together with the movable iron core 25. In addition, axial grooves 26a recessed radially inward are provided on the outer periphery of the rod 26 at substantially equal intervals in the circumferential direction, and the ends of the axial grooves 26a on the second fixed iron core 24 side. A communication hole 26b that communicates the inner and outer circumferences of the rod 26 is formed through the portion in the radial direction, and hydraulic fluid that has flowed into the axial grooves 26a from the spool valve 10 side is passed through the communication holes 26b. Through the inner peripheral side of the rod 26 and further through the inner peripheral portion of the rod 26 to the breathing hole 25a of the movable iron core 25, the axial movement of the rod 26 in the hydraulic oil is ensured.

  Hereinafter, the assembly process of the solenoid valve SV, particularly the crimping process of the yoke 21, will be described in detail with reference to FIG.

  First, after the coil unit 22 is accommodated in the yoke 21, the first fixed iron core 23 in which the rod 26 is accommodated on the inner periphery of the cylindrical portion 23a is fitted into the corresponding notch groove 27. In such a manner, the yoke 21 is inserted from the inner end side opening.

  Subsequently, as shown in FIG. 7A, one end portion of the valve body 11 is fitted into the inner end side opening of the yoke 21, and the outer end surface of the flange portion 13 is connected to the flange portion of the first fixed iron core 23. The front end portion of the first claw portion 31 (second widened portion 23c) is brought into contact with the outer end surface of the second claw portion 23b so that the front end portion of the first claw portion 31 overlaps with the locking groove 14 of the valve body 11 in the radial direction. To face the locking groove 14.

  After that, as shown in FIG. 7B, the front end portion (second widened portion 31 c) of the first claw portion 31 is pressed from the axial direction with the punch 40 used for the caulking process described above, and the chamfered portion 35 is interposed therebetween. The pressing force is applied inward (inward in the radial direction). Then, in the first claw portion 31, stress concentration occurs in the vicinity of both the concave portions 33, 33 based on the pressing force, and thereby, in the first claw portion 31 in the vicinity of the both concave portions 33, 33. The narrowest width portion 31a having the lowest rigidity serves as a bending point, and the second widened portion 31c on the front end side of the narrow width portion 31a without applying an excessive load to the first fixed iron core 23 as in the prior art. Can be tilted inward so as to engage with the locking groove 14 of the valve body 11. As a result, the entire inner surface of the second widened portion 31 c is pressed against the inner surface of the locking groove 14, that is, the inner surface of the flange portion 13, and the yoke 21 can be firmly fastened to the valve body 11. It becomes possible.

  Similarly, also on the second fixed core 24 side, the second fixed iron core 24 in which the movable iron core 25 is accommodated in the inner periphery of the cylindrical portion 24a is fitted into the corresponding notch groove 28. After inserting from the outer end side opening of the yoke 21, the front end portion (second widened portion 31 c) of the second claw portion 32 is held from the axial direction with the punch 40 in the same manner as the first claw portion 31 side. By pressing and inclining the second widened portion 31c inward, almost the entire inner surface of the second widened portion 31c is moved to the outer surface of the flange portion 24b of the second fixed iron core 24 (the cutout groove 28). It is possible to press-contact to the inner peripheral edge), and as a result, the yoke 21 can be firmly fastened to the second fixed iron core 24 (see FIGS. 4 and 5).

  As described above, according to the electromagnetic valve SV according to the present embodiment, in the first claw portion 31, the concave portions 33, 33 are arranged at positions where they overlap with the flange portion 13 of the valve body 11 serving as a locked portion. Due to the provision, stress concentration occurs in the vicinity of the concave portions 33 and 33 in accordance with the input from the distal end side of the first claw portion 31, and as a result, the first fixed iron core 23 is conventionally formed as in the past. Without applying an excessive load on the tip end side (second widened portion 31c) of the first claw portion 31, the narrowest portion 31a having the lowest rigidity formed between the concave portions 33 and 33 is used as a bending point. It can be easily tilted inward (inward in the radial direction).

  In other words, when the stress concentration as described above occurs, the first widened portion 31b having higher rigidity than the narrow-width portion 31a is bent in the narrow-width portion 31a (at the tip of the narrow-width portion 31a). Side tilt deformation), and thereby, a load acting directly or indirectly on the flange portion 23b of the first fixed iron core 23 based on the input from the distal end side of the first claw portion 31 by the punch 40. As a result, adverse effects such as deformation that the input from the punch 40 gives to the flange portion 23b of the first fixed iron core 23 can be suppressed.

  In addition, at this time, the concave portions 33 are provided at positions where they overlap with the outer end edge 13a of the flange portion 13 of the valve body 11 in the radial direction. Since the outer end edge 13a of the portion 13, that is, the corner portion of the outer end of the flange portion 13 can be used as a fulcrum, the first claw portion 31 can be bent more easily. As a result, the first fixed iron core 23 can be effectively suppressed from adverse effects such as deformation.

  Further, in the solenoid valve SV, the flange portion 13 of the valve body 11 and the groove bottom surface of the notch groove 27 in the flange portion 23b of the first fixed iron core 23 form a continuous smooth surface (substantially flush). (See FIG. 7), the load that the first claw portion 31 directly acts on the flange portion 23a of the first fixed iron core 23 can be minimized. It is possible to more effectively suppress adverse effects such as deformation on the fixed iron core 23.

  The recesses 33 and 33 are configured to have an arc (semicircle) shape with a substantially constant radius, thereby improving the workability of the recesses 33 and 33 related to press molding.

  Further, since the first widened portion 31b from the base portion of the first claw portion 31 to both the concave portions 33, 33 is configured such that the width dimension W2 is substantially the same in the extending direction, the first widened portion It becomes possible to ensure the rigidity of the part 31b to the maximum, and this can contribute to the effective support of the bending deformation of the first claw part 31 in the first widened part 31b.

  In addition, since the second widened portion 31c is configured to be tapered, the second claw portion 31 is also provided with good workability.

  FIG. 8 shows a modification of the first embodiment of the electromagnetic valve according to the present invention, in which the shapes of the recesses 33, 33 according to the first embodiment are changed. Since the basic configuration other than this configuration is the same as that of the first embodiment, the same configuration and operation as the first embodiment are denoted by the same reference numerals as those of the first embodiment. Description is omitted.

  In other words, in the solenoid valve SV according to the present embodiment, the concave portions 36 and 36 provided in the first claw portion 31 of the yoke 21 have a non-circular curved shape, more specifically, a width dimension as illustrated. It is formed so as to have a U shape having a different depth dimension, and is configured such that the width dimension W1 of the narrow width part 31a is approximately ½ of the width dimension W2 of the both widened parts 31b and 31c. Yes.

  According to this configuration, the width dimension W1 of the narrow width portion 31a is smaller than the concave portions 33 and 33 according to the first embodiment formed in a substantially semicircular shape, and the rigidity of the narrow width portion 31a is reduced. The stress concentration in the recesses 36 and 36 can be further increased. Thereby, it becomes possible to tilt the front end side (second widened portion 31c) of the first claw portion 31 more easily with the narrow portion 31a as a turning point, and the input by the punch 40 is the first fixed iron core. The adverse effects such as deformation given to 23 can be further suppressed.

  FIGS. 9 and 10 show a second embodiment of the electromagnetic valve according to the present invention, in which the arrangement of the recesses 33 according to the first embodiment is changed. Since the basic configuration other than this configuration is the same as that of the first embodiment, the same configuration and operation as the first embodiment are denoted by the same reference numerals as those of the first embodiment. Description is omitted.

  That is, in the electromagnetic valve SV according to the present embodiment, both the concave portions 33 and 33 are eliminated in the first claw portion 31 of the yoke 21, and instead the longitudinal position (valve in which the concave portions 33 and 33 are formed) The inner surface of the first claw portion 31 at the outer edge 13a of the flange portion 13 of the body 11 and the axial position overlapping in the radial direction) on the entire width direction of the first claw portion 31 along the width direction. A recess 37 having a substantially semicircular cross-sectional shape similar to both the recesses 33 and 33 is cut out.

  And from such a structure, in the 1st nail | claw part 31, it is comprised so that the rigidity of the thin part 31d provided with the said recessed part 37 may become the lowest. As a result, when the first claw portion 31 is caulked when the yoke 21 is fixed to the valve body 11, the second widened portion 31c tilts inward (inward in the radial direction) with the thin portion 31d as a bending point. (Refer to the broken line in FIG. 10).

  As described above, according to the electromagnetic valve SV according to the present embodiment, when the yoke 21 is caulked to the valve body 11 when the electromagnetic valve SV is assembled, the tip end portion of the first claw portion 31 is held by the punch 40. By pressing, stress concentration occurs in the concave portion 37, and thereby the thin-walled portion 31 d having the lowest rigidity due to the concave portion 37 is used as a bending point, and the distal end side of the concave portion 37 of the first claw portion 31. The (second widened portion 31c) can be easily tilted inward.

  Therefore, also according to the present embodiment, similarly to the first embodiment, it is possible to suppress adverse effects such as deformation that the input by the punch 40 gives to the flange portion 23b of the first fixed iron core 23.

  Moreover, in this embodiment, since the said recessed part 37 is provided over the whole width direction of the 1st nail | claw part 31, the rigidity of the said thin part 31d can be reduced effectively, and the 2nd widening part It becomes possible to deform 31c more easily. Thereby, the deformation of the first claw portion 31 is further reduced in adverse effects on the first fixed iron core 23.

  Furthermore, since the concave portion 37 is configured so that the cross section thereof is substantially arcuate, excessive stress concentration in the concave portion 37 can be suppressed. Problems such as damage can be avoided.

  The present invention is not limited to the configuration of each of the above embodiments. For example, each of the recesses 33, 36, and 37 is not necessarily at the same axial position as the outer edge 13 a of the flange portion 13 of the valve body 11. It does not need to be formed, and any axial position can be set as long as it is an axial position overlapping with the flange portion 13 in the radial direction.

  And the fixing structure by caulking of the yoke 21 which concerns on each said embodiment is widely applicable also to things other than the said solenoid valve SV.

  The technical ideas other than the invention described in each claim within the scope of the claims ascertained from the embodiment will be described below.

(A) In the solenoid valve according to claim 1,
A solenoid valve characterized in that a radius of an arc constituting the recess is constant.

  By setting it as this structure, the workability of the said recessed part can be improved.

(B) In the solenoid valve according to claim 1,
Each said claw part is set to the substantially same circumferential direction width from the said base part to the said recessed part, The solenoid valve characterized by the above-mentioned.

  By adopting such a configuration, it becomes possible to secure the rigidity of the base part side of each claw part to the maximum. Therefore, in bending deformation of each claw part, the bending deformation of each claw part is changed to the base part side. Can be effectively supported.

(C) In the solenoid valve according to (b),
The solenoid valve according to claim 1, wherein a tip portion of each claw portion is formed in a tapered shape.

  By setting it as this structure, it is provided to ensuring the favorable workability of each said nail | claw part.

(D) In the solenoid valve according to (c),
The solenoid valve according to claim 1, wherein a tip portion of each of the claw portions is formed in a tapered shape.

  By setting it as this structure, it is provided to ensuring the favorable workability of each said nail | claw part.

(E) In the solenoid valve according to claim 1,
The said case is comprised by rounding a plate member into a cylinder shape and joining the circumferential direction both ends, The electromagnetic valve characterized by the above-mentioned.

  With such a configuration, it is possible to ensure good productivity of the case.

(F) In the solenoid valve according to claim 1,
The said case is comprised with the magnetic body, The solenoid valve characterized by the above-mentioned.

(G) In the solenoid valve according to claim 3,
The solenoid valve according to claim 1, wherein the concave groove is provided over the entire width direction of each of the claw portions.

  By adopting such a configuration, it becomes possible to more easily deform each of the claw portions, thereby further reducing the influence of the deformation of each of the claw portions on the fixed iron core.

(H) In the solenoid valve according to claim 3,
The solenoid valve according to claim 1, wherein the concave groove is provided inside each of the claw portions.

  By adopting such a configuration, it is possible to easily deform the respective claw portions inward, and thereby, it is possible to further reduce the influence of the deformation of the respective claw portions on the fixed iron core.

(I) In the solenoid valve according to claim 3,
The solenoid valve according to claim 1, wherein the groove has a substantially arcuate cross section.

  By adopting such a configuration, it is possible to suppress excessive stress concentration in the concave groove, thereby serving to avoid problems such as breakage of the respective claw portions.

(J) A fixing structure using a plurality of claw portions for fixing the second member to the first member by deforming the plurality of claw portions provided on the first member to the second member side,
Between the base part and the tip part of each claw part, an arcuate recess is formed from both sides in the width direction of each claw part, and
The narrowest part between the recesses is provided at the same axial position as the outer edge of the second member or at the axial position on the base side of each claw part relative to the outer edge of the second member. A fixing structure using a plurality of claws characterized by the above.

SV ... solenoid valve 11 ... valve body 12 ... spool 21 ... yoke 22b ... coils 23, 24 ... first and second fixed iron cores (fixed iron cores)
25 ... movable iron core 30 ... trunk 31 ... first claw part (plural claw parts)
33 ... recess

Claims (3)

A coil wound in a ring;
Provided so as to surround the outer peripheral side of the coil, and is constituted by a trunk portion that is open to at least one end side in the axial direction, and a plurality of claw portions that are integrally formed at the open end of the trunk portion. A case made of magnetic material,
A movable iron core disposed axially movable on the inner peripheral side of the coil;
A fixed iron core disposed at the open end of the body,
A hollow valve body fixed to the open end of the trunk together with the fixed iron core by deforming the claw inward;
A spool that moves in the valve body in the axial direction along with the axial movement of the movable iron core,
Between the root and the tip of each claw, an arc-shaped recess is cut out from both sides in the circumferential direction of the trunk, and
The narrowest part between the recesses is the same axial position as the outer edge of the valve body that abuts against the fixed iron core from the axial direction, or the axial position on the trunk side of the outer edge of the valve body. A solenoid valve characterized by being provided in the above. A coil wound in a ring;
Provided so as to surround the outer peripheral side of the coil, and is constituted by a trunk portion that is open to at least one end side in the axial direction, and a plurality of claw portions that are integrally formed at the open end of the trunk portion. A case made of magnetic material,
A movable iron core disposed axially movable on the inner peripheral side of the coil;
A fixed iron core disposed at the open end of the body,
A hollow valve body fixed to the open end of the trunk together with the fixed iron core by deforming the claw inward;
A spool that moves in the valve body in the axial direction along with the axial movement of the movable iron core,
Between the root part and the tip part of each claw part, a concave part cut out in a curved shape is formed from both sides in the circumferential direction of the trunk part,
The narrowest part between the recesses is the same axial position as the outer edge of the valve body that abuts against the fixed iron core from the axial direction, or the axial position on the trunk side of the outer edge of the valve body. A solenoid valve characterized by being provided in the above. A coil wound in a ring;
Provided so as to surround the outer peripheral side of the coil, and is constituted by a trunk portion that is open to at least one end side in the axial direction, and a plurality of claw portions that are integrally formed at the open end of the trunk portion. A case made of magnetic material,
A movable iron core disposed axially movable on the inner peripheral side of the coil;
A fixed iron core disposed at the open end of the body,
A hollow valve body fixed to the open end of the trunk together with the fixed iron core by deforming the claw inward;
A spool that moves in the valve body in the axial direction along with the axial movement of the movable iron core,
A concave groove extending in the width direction of each claw part is formed between the root part and the tip part in each claw part, and
The concave groove is provided at the same axial position as the outer end edge of the valve body that abuts the fixed iron core from the axial direction or at an axial position closer to the body portion than the outer end edge of the valve body. An electromagnetic valve characterized by

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