JP2018054008A - Electromagnetic valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic valve device which achieves excellent oil resistance and water resistance and can be used in various environments in the atmosphere.SOLUTION: A core 1, a plunger pin 2, a bobbin body 4 including a first resin member 3, a coil 5, and a second resin member 7 covering an outer periphery of the coil 5 are housed in a cylindrical case 8. A first seal member 11 seals a gap between the second resin member 7 and the case 8. A second seal member 12 seals a gap between the core 1 and the bobbin body 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic valve device used for, for example, an automatic transmission of a vehicle.

  A control valve for controlling a speed change mechanism is provided in an automatic transmission of a vehicle. The control valve controls the transmission mechanism by supplying and stopping a predetermined amount of hydraulic pressure to the transmission mechanism using an electromagnetic valve device.

  Such an electromagnetic valve device is described in Patent Document 1, for example. The electromagnetic valve device of Patent Document 1 is an ON / OFF type electromagnetic valve, and this electromagnetic valve device includes a nozzle that accommodates a valve body and a solenoid that drives the valve body. The solenoid houses a bobbin body around which a coil is wound, a fixed core, and a plunger pin that reciprocates at the center of the coil inside a cylindrical case. The solenoid valve device reciprocates the plunger pin by energizing the solenoid coil, and opens and closes the valve body at the tip of the plunger pin.

Japanese Patent Laid-Open No. 2003-207069

  Since the on / off type solenoid valve device used in automatic transmissions is premised on use in oil, there is a gap between the case and the resin member, oil leakage inside the device, And it is not structured to prevent the ingress of liquids such as oil and water from the outside. Further, since the solenoid valve device of the prior art has fixed the metal core by insert molding to the resin bobbin body, oil leakage from the interface between the resin member and the metal member to be inserted or oil from the outside And water intrusion. For this reason, there is a problem in that it cannot be used in an environment where oil resistance and waterproofing are required, such as in the atmosphere, and the application is limited to the automatic transmission.

  It is an object of the present invention to provide an electromagnetic valve device that is free from oil leakage from the inside of a case and from the ingress of oil or water from the outside, is excellent in oil and water resistance, and can be used in various environments such as in the atmosphere. Objective.

The electromagnetic valve device of the present invention is characterized by having the following configuration.
(1) A cylindrical core having a through hole extending from one end side in the axial direction to the other end side.
(2) A plunger pin that is inserted into the through hole so as to be movable in the axial direction, and the other axial end projects from the core.
(3) A first bobbin body including a cylindrical bobbin body having a through space extending in the axial direction while supporting the core on the inner side, and a recessed groove portion extending in the circumferential direction on the outer peripheral surface with respect to the central axis of the through space. Resin member.
(4) A coil wound around the concave groove of the bobbin body.
(5) A second resin member that covers the peripheral surface of the coil, the peripheral surface of the bobbin body, and the peripheral surface on the other end side of the core.
(6) A cylindrical case that covers the second resin member, accommodates the core, the plunger pin, the bobbin body, and the coil therein, and is open at the other end in the axial direction.
(7) A circumferential groove provided on the entire circumference of the second resin member, and a first annular ring that is fitted in the groove and seals a gap between the second resin member and the case. Seal member.
(8) An annular second seal member that is fitted in the circumferential groove provided on the entire circumference of the peripheral surface on the other end side of the core and seals a gap between the core and the bobbin body.

In the present invention, the following configuration is preferable.
(1) The first resin member includes a nozzle portion provided so as to protrude from an opening on the other axial end side of the case,
A hollow portion extending in the axial direction is provided inside the nozzle portion,
In the hollow part of the nozzle part, the other axial end of the core is fitted,
The second seal member is disposed between an inner periphery of the hollow portion of the nozzle portion and an outer periphery on the other axial end side of the core.
(2) An annular third annular member disposed in close contact between the entire peripheral surface on one end side of the core and the inner surface of the second resin member and sealing a gap between the core and the second resin member. A sealing member is provided.
(3) A flange portion projecting toward the outer peripheral side is provided on one axial end side of the core, and a third seal member is disposed between the surface on the one end side of the bobbin body and the flange portion.
(4) The inner diameter of the case has a smaller diameter on one end side in the axial direction than the other end side, and the first seal member is in close contact with the inner surface of the small diameter portion.
(5) The outer diameter of the core has a small diameter at the other end in the axial direction, and the second seal member is disposed on the outer peripheral portion of the small diameter portion.

  According to the present invention, the oil inside the electromagnetic valve is removed from the case by the first seal member 11 that closes the gap between the case inner surface and the resin member, and the second seal member 12 that closes the boundary surface between the core and the resin bobbin body. It is possible to effectively prevent leakage to the outside, and an electromagnetic valve device having excellent oil leakage and waterproof properties can be obtained.

FIG. 1 is a perspective view of the electromagnetic valve device according to the first embodiment cut longitudinally at the center. FIG. 2 is a longitudinal sectional view of the electromagnetic valve device according to the first embodiment.

[1. First Embodiment]
[1-1. Constitution]
A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the present embodiment, the axis refers to the central axis along the longitudinal direction of the cylindrical core 1, and simply referring to the circumferential direction or the axial direction indicates the circumferential direction of the central axis or the axial direction of the central axis. One end in the axial direction indicates the upper side in the figure, and the other end in the axial direction indicates the lower side in the figure.

  The solenoid valve device of the present embodiment includes a cylindrical core 1 having a through hole 1a extending from one end side in the axial direction to the other end side. A plunger pin 2 is inserted into the through hole 1a of the core 1 so as to be movable in the axial direction. The other end side of the plunger pin 2 in the axial direction protrudes from the core 1. A suction plate 2a that is attracted to the other axial end by excitation of the coil 5 is fixed to one axial end of the core 1, and one axial end of the plunger pin 2 is attached to the center of the suction plate 2a. Yes.

  A first resin member 3 having a cylindrical bobbin body 4 is provided outside the core 1. The bobbin body 4 has a through space 4a extending in the axial direction at the center thereof, and the core 1 is supported inside the through space 4a. On the outer peripheral surface of the bobbin body 4, a concave groove portion 4b extending in the circumferential direction with respect to the central axis of the through space 4a is provided. The coil 5 is wound around the concave groove 4b. The first resin member 3 is provided with a nozzle portion 6 that protrudes from the opening on the other axial end side of the case 8. A hollow portion 6a extending in the axial direction is provided inside the nozzle portion 6, and the other axial end side of the core 1 is fitted into the hollow portion 6a.

  A second resin member 7 is provided on the outer peripheral surface of the coil 5, the peripheral surface of the bobbin body 4, and the outer peripheral surface on the other end side of the core 1. A cylindrical case 8 having an opening at the other end in the axial direction is provided outside the second resin member 7. The case 8 has a large outer diameter on the other axial end side that is an opening, and a smaller outer diameter on one axial end side that is the bottom side. The case 8 covers the second resin member 7 and accommodates the core 1, the plunger pin 2, the bobbin body 4 and the coil 5 inside.

  A circular metal plate 9 is fitted into the opening of the case 8 so as to close the opening. An opening for inserting the other axial end of the core 1 is provided at the center of the metal plate 9, and provided on the outer edge of the other axial end of the core 1 at the edge of the axial end of the opening of the core 1. The core 1 and the metal plate 9 are positioned by hitting the stepped portion 8a. A plurality of holes are provided around the opening in the metal plate 9 at equal intervals, and the metal plate 9 is fixed to the first resin member 3 by insert molding in a state where the resin is filled in the holes.

  The outer peripheral portion of the metal plate 9 protrudes in a flange shape outward in the circumferential direction from the outer peripheral surfaces of the first resin member 3 and the second resin member 7. A step 8 a into which the outer periphery of the metal plate 9 enters is provided on the inner peripheral surface of the opening of the case 8, and the case 8 is crimped so that the edge of the opening of the case 8 holds the outer periphery of the metal plate 9. The metal plate 9 is fixed.

  Grooves 10 extending in the circumferential direction are provided on the entire circumference of the second resin member 7. An annular first seal member 11 that seals the gap between the second resin member 7 and the case 8 is fitted into the groove 10. The inner diameter of the case 8 has a smaller diameter at one end in the axial direction than the other end, and the first seal member 11 is in close contact with the inner surface of the small diameter portion. As the first seal member 11, for example, an O-ring can be used, but a seal member having another shape may be used. The same applies to a second seal member 12 and a third seal member 13 which will be described later.

  Grooves 10 extending in the circumferential direction are provided on the entire circumference of the outer peripheral surface on the other end side of the core 1. An annular second seal member 12 is fitted into the groove 10. The outer diameter of the core 1 has a small diameter on the other end side in the axial direction, and the second seal member 12 is disposed on the outer peripheral portion of the small diameter portion. The second seal member 12 is disposed in close contact between the inner periphery of the hollow portion 6 a of the nozzle portion 6 and the outer periphery on the other axial end side of the core 1, and seals the gap between the core 1 and the bobbin body 4. .

  A flange portion 1 b that protrudes to the outer peripheral side is provided on the entire circumference of the peripheral surface on one axial end side of the core 1. An annular third seal member 13 is disposed between the surface on the other axial end side of the flange portion 1 b and the one end side surface of the bobbin body 4 provided on the second resin member 7. The third seal member 13 seals the gap between the core 1 and the second resin member 7.

  The nozzle portion 6 has a substantially cylindrical shape having a hollow portion 6a inside. A pin receiving portion 6b for inserting the plunger pin 2 is provided on one end side in the axial direction of the nozzle portion 6 so as to communicate with the hollow portion 6a. The nozzle portion 6 is provided with a first port 6c and a second port 6d that communicate with the hollow portion 6a. A spherical valve body 6e that is driven by the plunger pin 2 to open and close between the first port 6c and the second port 6d is accommodated in the hollow portion 6a of the nozzle portion 6. The valve body 6e is pressed to one axial end side by a coil spring 6f inserted into the hollow portion 6a. When the coil 5 is excited against the coil spring 6f and the plunger pin 2 is moved downward, the valve body 6e moves to the other end side in the axial direction, and the valve is released.

  The outer diameter of the nozzle portion 6 on the other end side in the axial direction is one step smaller in diameter from the metal plate 9 on the other end side in the axial direction, and further one step smaller in diameter on the other end side in the axial direction than the small diameter portion. Yes. On the outer periphery of each stage of the nozzle section 6 that has a small diameter in two stages, an O-ring that secures the sealing performance between the nozzle section 6 and the valve body when the solenoid valve device is attached to the valve body or the like of an automatic transmission. Each of the sealing members 6h is provided.

[1-2. Action]
(1) Manufacturing method of electromagnetic valve device The electromagnetic valve device of the present embodiment is manufactured as follows.

(a) After the metal plate 9 is insert-molded on the first resin member 3 and both are fixed, the coil 5 is wound around the concave groove portion 4 b on the outer periphery of the bobbin body 4 provided on the first resin member 3.

(b) The second resin member 7 is molded so as to cover the periphery of the bobbin body 4 and the core 1 by a molding method, and the second resin member 7, the bobbin body 4 and the core 1 are fixed. The first seal member 11 is fitted into the groove 10 on the peripheral surface of the second resin member 7.

(c) The second seal member 12 is fitted into the groove 10 provided on the outer periphery on the other axial end side of the core 1 and the other axial end of the flange portion 1b provided on the one axial end side of the core 1 The third seal member 13 is fitted on the side. The core 1 fitted with the second seal member 12 and the third seal member 13 is inserted into the through space 4a of the bobbin body 4 from one end side in the axial direction.

(d) With the core 1, the bobbin body 4 and the second resin member 7 fixed, the plunger pin 2 is inserted into the through-hole 1a of the core 1 from one axial end side, and the axial end of the plunger pin 2 is inserted A suction plate 2a is attached.

(e) A component comprising the core 1, the bobbin body 4, the second resin member 7, and the plunger pin 2 is inserted into the case 8 from the other axial end side, and the outer edge of the metal plate 9 is the inner periphery of the opening of the case 8. The metal plate 9 is fixed by crimping the edge of the opening of the case 8 inward while being pressed and positioned against the step 8a. At this time, the gap between the inner peripheral surface of the case 8 and the second resin member 7 is closed by the first seal member.

(f) The valve body 6e and the coil spring 6f are inserted into the hollow portion 6a of the nozzle portion 6 from the other axial end side of the first port 6c, and a ring-shaped cap is formed on the other axial end side of the first port 6c. 6g is fitted to prevent the valve body 6e and the coil spring 6f from coming off.

(2) Sealing function In the solenoid valve device of the present embodiment, as shown in FIG. 2, a first sealing member 11, a second sealing member 12, and a third sealing member 13 are provided, and these sealing members It prevents oil from leaking from the inside to the outside of the solenoid valve device, and also prevents water from entering from the outside.

  The first seal member 11 seals the gap between the second resin member 7 and the case 8. Therefore, as shown in FIG. 2A, the gap between the opening of the case 8 and the second resin member 7 and the interface between the metal plate 9 and the first resin member 3 shown in FIG. Prevent oil and water from entering the solenoid valve device.

  The second seal member 12 is provided between the outer peripheral surface of the core 1 and the inner peripheral surface of the first resin member 3. Therefore, as shown in FIG. 2C, oil that has entered from the valve body via the nozzle portion 6 is prevented from entering the gap between the core 1 and the bobbin body 4. Further, as shown in FIG. 2D, external water passes through the gap between the opening of the case 8 and the nozzle portion 6, and the gap between the inner peripheral surface of the nozzle portion 6 and the outer peripheral surface of the core 1. Prevents entry into the valve body.

  The third seal member 13 is provided between one axial end side of the core 1 and the second resin member 7. Therefore, as shown to E of FIG. 2, the oil which penetrates from the nozzle side through the clearance between the inner peripheral surface of the core 1 and the plunger pin 2 is prevented from entering the clearance between the core 1 and the bobbin body 4.

[1-3. effect]
According to this embodiment, the following effects are exhibited.

(1) Conventionally, by inserting the core 1 that has been insert-molded when the bobbin body 4 is molded into the bobbin body 4 after molding, the seal member can be disposed on the outer periphery of the core 1. Thereby, the outside and the inside of the electromagnetic valve device are shut off, an airtight structure is formed, and leakage and intrusion of oil and water can be prevented. As a result, the place where the electromagnetic valve device is used is not limited to an automatic transmission that is premised on use in oil, and the application of the electromagnetic valve device is expanded.
(2) A hollow portion 6 a extending in the axial direction is provided inside the nozzle portion 6, and the other axial end of the core 1 is fitted into the hollow portion 6 a of the nozzle portion 6, and the inside of the hollow portion 6 a of the nozzle portion 6 Since the second seal member 12 is disposed between the circumference and the outer circumference on the other end side in the axial direction of the core 1, in the resin nozzle protruding from the case 8, the gap between the cylindrical core 1 and the nozzle inner surface Can be prevented.
(3) An annular third annular member arranged in close contact between the entire circumference of the peripheral surface on one end side of the core 1 and the inner surface of the second resin member 7 and sealing the gap between the core 1 and the second resin member 7. Since the seal member 13 is provided, the core 1 and the plunger pin 2 are prevented from entering from the other axial end side.
(4) A flange portion 1b that protrudes to the outer peripheral side is provided on one axial end side of the core 1, and a third seal member 13 is disposed between the surface on one end side of the bobbin body 4 and the flange portion 1b. Since the third sealing member 13 is sandwiched between the bobbin body 4 and the bobbin body 4, the sealing member can be easily positioned.
(5) Since the inner diameter of the case 8 is smaller on the one end side in the axial direction than the other end side, and the first seal member 11 is in close contact with the inner surface of the smaller diameter portion, the case 8 is placed on the larger diameter portion side. The resin member can be covered, and the fitting operation of the case 8 is easy.
(6) Since the outer diameter of the core 1 has a small diameter at the other end in the axial direction, and the second seal member 12 is disposed on the outer peripheral portion of the small diameter portion, the core 1 is fitted into the nozzle portion 6. Work is easy.

[2. Other Embodiments]
The present invention is not limited to the above embodiment. The above embodiments are presented as examples, and can be implemented in various other forms. Various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope, gist and equivalent range of the invention. An example is shown below.

(1) The case 8 and the internal members may be fixed by other structures such as screwing, press-fitting, and screwing without depending on the caulking process of the metal plate 9 and the case 8.

(2) Although 1st Embodiment provided the nozzle part 6 in a part of 1st resin member 3, the 1st resin member 3 and the nozzle part 6 which have the bobbin body 4 are comprised separately, and both May be fixed by caulking or screwing.

(3) As a method of covering the coil 5 and the first resin member 3 with the second resin member 7, in addition to the insert molding of the first embodiment, separately molded resin members may be fitted and fixed. .

(4) The nozzle unit 6 can also be applied to a normal high type solenoid valve device.

DESCRIPTION OF SYMBOLS 1 ... Core, 1a ... Through-hole, 1b ... Flange part, 2 ... Plunger pin, 2a ... Adsorption plate, 3 ... 1st resin member, 4 ... Bobbin body, 4a ... Through space, 4b ... Concave groove part, 5 ... Coil 6 ... Nozzle part, 6a ... Hollow part, 6b ... Pin receiving part, 6c ... 1st port, 6d ... 2nd port, 6e ... Valve body, 6f ... Coil spring, 6g ... Cap, 6h ... Seal member, 7 ... 2nd resin member, 8 ... case, 8a ... step, 9 ... metal plate, 10 ... groove, 11 ... first seal member, 12 ... second seal member, 13 ... third seal member.

Claims (6)

A cylindrical core having a through hole extending from one end side in the axial direction to the other end side;
A plunger pin that is inserted in the through hole so as to be movable in the axial direction, and whose other axial end projects from the core;
A first resin member provided with a cylindrical bobbin body having a through space extending in the axial direction while supporting the core on the inner side, and a recessed groove portion extending in the circumferential direction on the outer peripheral surface with reference to the central axis of the through space When,
A coil wound around the concave groove of the bobbin body;
A second resin member covering a peripheral surface of the coil, a peripheral surface of the bobbin body, and a peripheral surface on the other end side of the core;
A cylindrical case that covers the second resin member, accommodates the core, plunger pin, bobbin body, and coil therein, and that is open at the other end in the axial direction;
In a solenoid valve device comprising:
A circumferential groove provided on the entire circumference of the second resin member, and an annular first seal member which is fitted in the groove and seals a gap between the second resin member and the case; ,
A circumferential groove provided on the entire circumference of the peripheral surface on the other end side of the core, and an annular second seal member that is fitted in the groove and seals a gap between the core and the bobbin body;
Solenoid valve device with The first resin member includes a nozzle portion provided to protrude from the opening portion on the other axial end side of the case,
A hollow portion extending in the axial direction is provided inside the nozzle portion,
In the hollow part of the nozzle part, the other axial end of the core is fitted,
2. The electromagnetic valve device according to claim 1, wherein the second seal member is disposed between an inner periphery of the hollow portion of the nozzle portion and an outer periphery on the other axial end side of the core.   An annular third sealing member disposed in close contact between the entire circumference of the peripheral surface on one end side of the core and the inner surface of the second resin member and sealing a gap between the core and the second resin member. The electromagnetic valve device according to claim 1 or claim 2 provided.   The flange part which protruded to the outer peripheral side was provided in the axial direction one end side of the said core, The 3rd sealing member is arrange | positioned between the surface of the one end side of the said bobbin body, and the said flange part. Solenoid valve device.   The inner diameter of the case has a smaller diameter at one end in the axial direction than the other end, and the first seal member is in close contact with the inner surface of the small diameter portion. Solenoid valve device. 6. The outer diameter of the core according to claim 1, wherein the other end side in the axial direction has a small diameter, and the second seal member is disposed on an outer peripheral portion of the small diameter portion. Solenoid valve device.