CN206723550U - Electromagnetic valve device - Google Patents

Abstract

The utility model provides an electromagnetic valve device. The casing (6) is open on one side in the axial direction, and has a pressing portion (7) formed by bending the peripheral edge facing the opening inwardly. The cylindrical stator core (13) is mounted on the coil frame (10 ) is arranged coaxially with the bobbin (10) inside, and has a through hole penetrating in the axial direction. The annular iron core (16) is arranged between the bottom surface of the casing (6) and the stator iron core (13). The annular iron core (16) and the stator iron core (13) are sandwiched between the bottom of the casing (6) and the pressing part (7) to be fixed.

Description

Solenoid valve device

technical field

The utility model relates to a solenoid valve device, which is suitable for use as a control valve of a transmission of an automobile, for example.

Background technique

The automatic transmission of the vehicle is provided with a control valve for controlling the transmission mechanism.

The control valve controls the transmission mechanism by supplying or stopping hydraulic pressure of a predetermined magnitude to the transmission mechanism using a solenoid valve device.

Conventionally, as one of such solenoid valve devices, Japanese Laid-Open Patent Publication No. 2009-275899 or Japanese Laid-Open Patent Publication No. 2015-75165 discloses that a spool valve is reciprocated by a plunger. In this solenoid valve device, a coil and a stator core are arranged coaxially in a metal shell with a bottom that is open at one end, and a plunger inserted in the center of the stator core is reciprocated by the magnetic force generated by the coil. . The plunger presses a pin disposed on the coaxial extension line, and the end of the pin presses the spool, whereby the spool moves.

In such a solenoid valve device, a magnetic circuit passing through the metal case and the stator core provided therein is formed, and at this time, the bottom of the metal case functions as a yoke of the magnetic circuit. However, in general, since the metal case is manufactured by stamping a metal plate thinner than the stator core into a cup shape by deep drawing, the metal case has a small cross-sectional area and a large magnetic resistance. In order to improve this situation, in Patent Document 2, an annular iron core is arranged at the bottom of the metal case, and the cross-sectional area of the yoke is increased by making the annular iron core contact the stator iron core, thereby reducing the magnetic flux density. resistance.

However, the technology of Patent Document 2 has the following problem: since the ring-shaped iron core is pressed against the bottom inner surface of the metal shell by the lock washer arranged between the coil and the ring-shaped iron core, the The change of the spring force causes the surface contact between the ring-shaped iron core and the bottom of the metal shell to become unstable, and the magnetic attraction force will change.

Utility model content

The purpose of the present utility model is to provide a solenoid valve device capable of maintaining sufficient surface contact between the stator core, the annular core and the bottom of the metal shell, and allowing the magnetic flux to flow efficiently.

A solenoid valve device according to an exemplary embodiment of the present invention has the following structure.

(1) A bottomed cylindrical case made of magnetic material, one side of the case in the axial direction is open, and the case has a pressing part formed by bending the peripheral edge facing the opening inwardly. department.

(2) A cylindrical bobbin with both ends opened is coaxially arranged inside the cylindrical case and has a through hole penetrating from one side to the other side in the axial direction.

(3) A coil is wound on the outer periphery of the bobbin.

(4) The cylindrical stator core is made of a magnetic material, is disposed coaxially with the bobbin inside the bobbin, and has a through hole penetrating in the axial direction.

(5) The plunger is made of a magnetic material, and is disposed coaxially with the stator core inside the through hole so as to be movable in the axial direction.

(6) The annular iron core is made of a magnetic material and disposed between the bottom surface of the case and the stator iron core.

(7) The valve is opened and closed by the axial movement of the plunger by the excitation of the coil.

(8) The annular iron core and the stator iron core are sandwiched between the bottom of the housing and the pressing portion to be fixed.

In the present invention, the following structures can be adopted.

(1) A step portion that engages with an end portion of the stator core is provided on a surface of the annular core that faces the stator core,

The annular iron core is positioned in the radial direction by an end portion of the stator iron core engaged with the stepped portion.

(2) A circular plunger insertion hole penetrating in the axial direction is provided in the center of the annular iron core coaxially with the annular iron core, and the inner diameter of the plunger insertion hole is smaller than the The outer diameter of the plunger is slightly larger,

The stepped portion of the annular iron core is provided coaxially with the plunger insertion hole around the plunger insertion hole,

The stepped portion of the annular iron core is composed of an axial end surface of the annular iron core having a thinner thickness in the axial direction and an inner surface wall having an inner diameter larger than that of the through hole,

The inner diameter of the inner surface wall is consistent with the inner diameter of the through hole provided on the frame.

(3) The solenoid valve device has:

a pin guide core disposed between the opening portion of the housing and the stator core;

a guide hole provided in the pin guide core in the same direction as the central axis of the plunger; and

a cylindrical pin inserted into the guide hole in a reciprocating manner,

The other axial side of the pin is in contact with one axial side of the plunger, and the axial side of the pin is in contact with the valve,

The annular core and the stator core are fixed by being sandwiched between the bottom of the case and the pressing part by means of the pin guide core.

(4) A non-magnetic member is interposed between the stator core and the pin guide core, and the non-magnetic member directs the magnetic path generated between the stator core and the pin guide core to the plunger. Side circuitous.

(5) The non-magnetic member is a cylindrical member having the same outer diameter as the stator core and the same central axis as the stator core,

A stepped portion having the same outer diameter as each other and smaller than an outer peripheral diameter of both the stator core and the pin guide core is formed on opposite end portions of both the stator core and the pin guide core. ,

Both ends of the non-magnetic member are fitted into the stepped portions of the stator core and the pin guide core, and the position in the axial direction is restricted by these stepped portions.

(6) A flange portion is provided at the end portion of the pin guide core on the opening side of the case, and the other side of the flange portion in the axial direction abuts against one end side of the bobbin in the axial direction,

The bobbin and the stator core are closely held between the bottom of the housing and the pressing part by means of the pin guide core.

(7) A plunger insertion hole penetrating in the axial direction is provided in the center of the annular iron core. The inner diameter of the hole is large.

According to an exemplary embodiment of the present invention, it is possible to provide a solenoid valve device capable of maintaining sufficient surface contact between the stator core, the annular core, and the bottom of the metal case, and allowing magnetic flux to flow efficiently.

The above and other features, elements, steps, features and advantages of the present invention can be more clearly understood from the following detailed description of preferred embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a longitudinal sectional view of the first embodiment.

Fig. 2 is an enlarged sectional view of a plunger portion in the first embodiment.

3 is an enlarged cross-sectional view of a plunger portion in a second embodiment.

4A and 4B are enlarged cross-sectional views illustrating the operation of the second embodiment.

Fig. 5 is an enlarged sectional view of a plunger portion in a third embodiment.

6A and 6B are cross-sectional views showing other embodiments.

detailed description

[1. The first embodiment]

[1.1 Structure]

Hereinafter, 1st Embodiment of this invention is demonstrated with reference to FIG.1 and FIG.2. In this embodiment, the axis refers to the central axis along the longitudinal direction of the slide valve, and when referred to simply as the circumferential direction or the axial direction, refers to the circumferential direction of the central axis or the axial direction of the central axis.

The solenoid valve device of the present embodiment is composed of a spool A and a plunger B. As shown in FIG.

The spool portion A has a cylindrical sleeve 1 and a spool 2 inserted therein so as to be slidable in the axial direction. A plurality of ports 3 are provided on the sleeve 1 in a manner penetrating through its wall surface. The spool 2 is provided with a spool 4 that opens and closes the port 3 . A flange 5 is provided on the end of the sleeve 1 on the side of the plunger part B, and the flange 5 is pressed against a pressing part 7 provided on the housing 6 of the plunger part B, whereby the slide valve part A It is fixed to the plunger part B. A cap member 8 is provided at an end of the sleeve 1 opposite to the plunger portion B, and a coil spring 9 is inserted between the cap member 8 and the end of the spool 2 .

The plunger part B has a bottomed cylindrical case 6 made of a magnetic material. One axial side of the housing 6 is open, and the housing 6 has a pressing portion 7 formed by bending a peripheral edge facing the opening inward. The bobbin 10 is arranged coaxially with the case 6 inside the case 6 . Both ends of the bobbin 10 are open, and have through holes penetrating from one side to the other side in the axial direction. A coil 12 is wound around the outer periphery of the bobbin 10 . The bobbin 10 is formed of a resin molded product. Flanges are provided at both ends of the winding portion of the coil 12 in the bobbin 10 , and a connector 11 exposed to the outside of the housing 6 is integrally formed on the flange on one side in the axial direction.

The cylindrical stator core 13 is arranged coaxially with the bobbin 10 in the through hole of the bobbin 10 . The stator core 13 is made of a magnetic material and has a through hole penetrating in the axial direction. A plunger 15 is disposed inside the through hole of the stator core 13 . The plunger 15 is made of a magnetic material and arranged coaxially with the stator core 13 so as to be movable in the axial direction.

An annular iron core 16 made of a magnetic material is disposed between the bottom surface of the case 6 and the stator iron core 13 . The corner between the inner surface of the casing 6 and the bottom inner surface has a curved arc shape, and the radially outer peripheral surface of the annular iron core 16 does not reach the inner surface of the arc-shaped casing 6 . That is, the diameter of the annular iron core 16 is such that it can be accommodated in the flat portion of the bottom of the case 6 .

A stepped portion 17 that engages with an end portion of the stator core 13 is provided on a surface of the annular core 16 that faces the stator core 13 . The positioning of the annular iron core 16 in the radial direction is performed by the end portion of the stator iron core 13 engaged with the stepped portion 17 . A circular plunger insertion hole 18 penetrating in the axial direction is provided at the center of the annular iron core 16 coaxially with the annular iron core 16 . The inner diameter of the plunger insertion hole 18 is slightly larger than the outer diameter of the plunger 15 , and does not contact the outer peripheral surface of the plunger 15 .

The stepped portion 17 of the annular core 16 is provided around the plunger insertion hole 18 coaxially with the plunger insertion hole 18 . The stepped portion 17 is composed of an axial end face with a thinner axial thickness of the annular core 16 and an inner surface wall whose diameter is larger than the diameter of the through hole. same inner diameter.

A pin guide core 19 is disposed between the opening of the case 6 and the stator core 13 . The pin guide core 19 is separately arranged without contacting the stator core 13 . A guide hole is provided in the pin guide core 19 in the same direction as the central axis of the plunger 15 . A columnar pressing pin 21 is reciprocally inserted into the guide hole. The other axial side of the push pin 21 is in contact with one axial side of the plunger 15 , and one axial side of the push pin 21 is in contact with the slide valve 2 to press the slide valve 2 .

A non-magnetic member 22 is interposed between the stator core 13 and the pin guide core 19 to detour the magnetic path generated between the stator core 13 and the pin guide core 19 to the plunger 15 side. The non-magnetic member 22 is made of, for example, metal such as stainless steel or aluminum, or hard resin, and is a cylindrical member having the same outer diameter and the same central axis as the stator core 13 . On end portions of both the stator core 13 and the pin guide core 19 that are opposed to each other, a stepped portion 23 is formed that has the same outer diameter as each other and is larger than that of the stator core 13 and the pin guide core 19 . The outer diameter is small. Both ends of the non-magnetic member 22 are fitted into the stepped portions 23 of the stator core 13 and the pin guide core 19 , and the positions of the non-magnetic member 22 in the axial and circumferential directions are restricted by these stepped portions 23 .

A flange portion 24 is provided at an end portion of the pin guide core 19 on the opening side of the case 6 , and the other side of the flange portion 24 in the axial direction abuts against one end side of the bobbin 10 in the axial direction. The flange portion 24 overlaps with the flange 5 of the slide valve portion A and also abuts against one end of the frame in the axial direction, and the flange portion 24 is pressed toward the bottom side of the housing 6 by the pressing portion 7 .

The effects of the first embodiment having the above-mentioned structure are as follows.

(1) The pressing force of the pressing part 7 is transmitted to the ring-shaped iron core 16 according to the order of the flange 5, the pin guide core 19, the non-magnetic component 22, and the stator core 13, so that the ring-shaped iron core 16 and the housing The bottom of the 6 is snug. At the same time, the pressing force of the pressing part 7 is transmitted to the ring-shaped iron core 16 in the order of the flange 5 , the pin guide core 19 , and the bobbin 10 , so that these parts are in close contact with the bottom of the housing 6 . As a result, the surface contact between the annular iron core 16 and the bottom surface of the housing 6 is stably maintained, the loss of the magnetic circuit is reduced, and the attractive force of the plunger 15 is improved.

(2) Since the cylindrical non-magnetic member 22 is combined with the stator core 13 and the pin guide core 19 through the stepped portion 23, the stator core 13, the non-magnetic member 22, and the pin guide core 19 are aligned in the circumferential and axial directions. Up is reliably positioned. As a result, it is possible to reliably withstand the pressing force of the opening of the housing 6, and the adhesion between the annular iron core 16 and the stator iron core 13, and between the annular iron core 16 and the bottom of the housing 6 is improved, and there is no magnetism. through leaks.

(3) Since the contact area between the stator core 13 and the annular core 16 is increased by the stepped portion 17 , the loss of magnetic flux is reduced and the magnetic flux is reliably transmitted to the bottom of the housing 6 .

(4) By providing the non-magnetic member 22 between the stator core 13 and the pin guide core 19 , the magnetic circuit necessarily passes through the plunger 15 , and the magnetic force generated by the coil 12 acts efficiently on the plunger 15 .

(5) Since the plunger 15 enters the plunger insertion hole 18 at the center of the annular iron core 16, even if the annular iron core 16 exists at the bottom of the housing 6, the stroke of the plunger 15 can be ensured. , the miniaturization corresponding to the thickness of the annular iron core 16 can be realized.

(6) The radially outer circumferential surface of the annular magnetic core does not reach the casing 6 , so that the housing workability in the casing 6 is improved, and the number of man-hours for processing and assembling is also reduced.

(7) Since the ring-shaped iron core 16 is brought into contact with the bobbin 10 and the pressing force of the pressing part 7 is transmitted from the bobbin 10 to the ring-shaped iron core 16, the positioning of the bobbin 10 in the axial direction is also stable. Very accurate.

(8) Since the corner between the inner surface of the housing 6 and the inner surface of the bottom is arc-shaped, the radial outer peripheral surface of the annular magnetic core does not reach the inner surface of the housing 6, so that the bottom surface side is also It does not float up, and it is also possible to maintain the close contact between the annular magnetic core and the bottom surface of the housing 6 .

[2. Second embodiment]

A second embodiment will be described with reference to FIGS. 3 and 4 . In the second embodiment, as shown in FIG. 3 , the inner diameter of the plunger insertion hole 18 is sufficiently larger than the outer diameter of the plunger 15 , and when the plunger 15 is inserted into the inner side of the annular core 16 Next, a gap 25 is formed between the outer periphery of the plunger 15 and the plunger insertion hole 18 .

In the first embodiment, as shown in FIG. 4A , the inner diameter of the plunger insertion hole 18 provided in the annular iron core is slightly larger than the outer shape of the plunger 15 so that the plunger 15 can move. On the other hand, in the second embodiment, as shown in FIG. 4B , the inner diameter of the plunger insertion hole 18 is sufficiently larger than the outer diameter of the plunger 15 . Therefore, in the second embodiment, in addition to the effects of the first embodiment, there is an advantage that when the plunger 15 advances and retreats relative to the plunger insertion hole 18, the end of the plunger 15 and the plunger The edge of the insertion hole 18 does not touch, and the stroke of the plunger 15 is sufficiently ensured.

[3. The third embodiment]

A third embodiment will be described based on FIG. 5 . In the third embodiment, a structure in which no stepped portion 17 is provided on the annular core 16 is employed. The stator core 13 is in contact with the surface of the annular core 16 at the end portion on the other axial side. Fix the annular iron core 16 and the bottom of the housing 6, the annular iron core 16 and the stator core 13, or the annular iron core 16 and the bobbin 10 with an adhesive, or In the case where the bottom of the annular iron core 16 and the housing 6 or the annular iron core 16 and the bobbin 10 are provided with steps or unevenness for positioning, and the circumferential positioning of the annular iron core 16 can be performed, The stepped portion 17 may not be provided on the annular core 16 .

In the third embodiment, since the pressing force of the pressing part 7 is transmitted to the annular iron core 16 via the stator iron core 13, the adhesion between the annular iron core 16 and the bottom of the housing 6 can be ensured, and the Efficient magnetic circuit.

[4. Other embodiments]

The present invention is not limited to the above embodiments. The above-mentioned embodiment is presented as an example, and it can be implemented in other various forms. Various omissions, substitutions, or changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and spirit of the invention, and their equivalents. An example thereof is shown below.

(1) The positioning of the stator core 13 , the non-magnetic member 22 , and the pin guide core 19 may be simply butt jointed, adhesively welded, or molded with resin-made parts.

(2) The pressing part 7 of the housing 6 may not press the pin guide core 19 or the sleeve 1 , or the pressing part 7 of the housing 6 may directly press the stator core 13 .

(3) The stepped portion 17 may be provided on the bottom side of the case 6 to position the annular core 16 in the circumferential direction.

(4) In each of the above-mentioned embodiments, the stepped portion 17 is shaped to embrace the stator core 13 from the outside as shown in FIG. The inner side of the iron core 13.

Claims (8)

1. A solenoid valve device, characterized in that, has: The casing is a bottomed cylindrical casing made of magnetic material, one axial side of the casing is open, and the casing has a pressing part formed by bending the peripheral edge facing the opening inwardly. department; A cylindrical coil bobbin with both ends open, which is coaxially arranged inside the housing and has a through hole penetrating from one axial side to the other; a coil wound around the outer circumference of the bobbin; a cylindrical stator core made of a magnetic material, disposed coaxially with the coil bobbin inside the coil bobbin, and having a through hole penetrating in the axial direction; a plunger made of a magnetic material disposed inside the through hole so as to be coaxial with the stator core and capable of moving in the axial direction; an annular core made of a magnetic material disposed between the bottom surface of the housing and the stator core; and a valve that performs an opening and closing action through the axial movement of the plunger by means of the excitation of the coil, The annular iron core and the stator iron core are sandwiched between the bottom of the housing and the pressing portion to be fixed. 2. The electromagnetic valve device according to claim 1, characterized in that, A stepped portion engaged with an end portion of the stator core is provided on a surface of the annular core that is opposite to the stator core, The annular iron core is positioned in the radial direction by an end portion of the stator iron core engaged with the stepped portion. 3. The electromagnetic valve device according to claim 2, characterized in that, A circular plunger insertion hole penetrating in the axial direction is provided at the center of the annular iron core coaxially with the annular iron core, and the inner diameter of the plunger insertion hole is smaller than that of the plunger. The outer diameter is slightly larger, The stepped portion of the annular iron core is provided coaxially with the plunger insertion hole around the plunger insertion hole, The stepped portion of the annular iron core is composed of an axial end surface of the annular iron core having a thin axial thickness and an inner surface wall having an inner diameter larger than that of the through hole, The inner diameter of the inner surface wall is consistent with the inner diameter of the through hole provided on the frame. 4. The solenoid valve device according to any one of claims 1 to 3, wherein the solenoid valve device has: a pin guide core disposed between the opening portion of the housing and the stator core; a guide hole provided in the pin guide core in the same direction as the central axis of the plunger; and a cylindrical pin inserted into the guide hole in a reciprocating manner, The other axial side of the pin is in contact with one axial side of the plunger, and the axial side of the pin is in contact with the valve, The annular core and the stator core are fixed by being sandwiched between the bottom of the case and the pressing part by means of the pin guide core. 5. The electromagnetic valve device according to claim 4, characterized in that, A non-magnetic member that detours a magnetic path generated between the stator core and the pin guide core toward the plunger is interposed between the stator core and the pin guide core. 6. The solenoid valve device according to claim 5, characterized in that, The non-magnetic member is a cylindrical member having the same outer diameter as the stator core and the same central axis as the stator core, A stepped portion having the same outer diameter as each other and smaller than an outer peripheral diameter of both the stator core and the pin guide core is formed on opposite end portions of both the stator core and the pin guide core. , Both ends of the non-magnetic member are fitted into the stepped portions of the stator core and the pin guide core, and the position in the axial direction is restricted by these stepped portions. 7. The solenoid valve device according to claim 6, characterized in that, The pin guide core has a flange at its end on the opening side of the case, and the other side of the flange in the axial direction abuts against one end of the bobbin in the axial direction, The bobbin and the stator core are closely held between the bottom of the housing and the pressing part by means of the pin guide core. 8. The solenoid valve device according to any one of claims 1 to 3, characterized in that, A plunger insertion hole penetrating in the axial direction is provided in the center of the annular iron core, and the inner diameter of the plunger insertion hole is larger than the outer diameter of the plunger and the through hole of the stator core. Large inner diameter.