JPH0542291Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Purpose of the invention [Field of industrial application] The present invention relates to a solenoid valve, in particular a solenoid valve that forms an outer passage between the inner peripheral surface of a housing and communicates with the outer passage. An inner member is disposed in the housing and includes an inner passage formed inside in the extending direction, and a valve member disposed at the tip of the plunger is disposed at the end of the inner passage. This invention relates to a solenoid valve in which communication between an outer passage and an inner passage is interrupted by abutting and separating from a valve seat member.

[Prior Art] Conventionally, this type of solenoid valve, like the solenoid valve 10 shown in FIG.
The distal end of the plunger 22 to be drawn into the interior a and the distal end of the cylindrical member 18 disposed on the outer periphery of the plunger 22 are made to protrude from the housing 15, and the distal end of the plunger 22 and the distal end of the cylindrical member 18 are A device with a valve installed has been proposed.

That is, in the solenoid valve 10 , a communication passage 20 is formed on the circumferential surface of the tip end of the plunger 22 protruding from the housing 15, and a communication passage 20 is formed on the circumferential surface of the tip end of the plunger 22 protruding from the housing 15.
Openings 17A and 17B are formed at the tip of the plunger 20, and as the plunger 20 moves, the opening 1
7A and 17B are communicated or blocked from each other by a communication passage 20.

[Problems to be solved] Therefore, in the conventional solenoid valve 10 ,
Since the valve part protruded from the housing 15, there were the following drawbacks: (1) a large installation space had to be secured within a mating member such as a hydraulic conduit, and (2) the overall size was increased. .

Therefore, the present invention aims to eliminate these drawbacks.
It is an object of the present invention to provide a solenoid valve in which a valve member and a valve seat member are disposed within a housing.

(2) Structure of the invention [Means for solving the problem] The solution to the problem provided by the invention is to move the plunger in response to the magnetic force generated by the solenoid coil while resisting the spring force of the return spring. A solenoid valve that is opened and closed by (a) a valve member disposed on one end surface of a plunger, and (b) disposed within a through hole of a housing that accommodates a solenoid coil, with an outer circumferential surface of the housing. an inner member that forms a first passage between the inner circumferential surface of the through hole and includes a second passage that is communicated with the first flow passage and is formed inside in the extending direction; (c) a valve seat member disposed at the end of the second passage, which interrupts communication between the first and second passages by abutting and separating the valve member; ``Solenoid valve''.

[Function] The solenoid valve according to the present invention is a solenoid valve that is opened and closed by moving a plunger in accordance with the magnetic force generated by a solenoid coil while resisting the spring force of a return spring. (b) The solenoid coil is disposed within the through hole of the housing that accommodates the solenoid coil, and the outer circumferential surface forms a first passage between the inner circumferential surface of the through hole of the housing and the solenoid coil. and (c) an inner member comprising a second passage formed therein in communication with the first flow passage and extending in the extending direction; and (c) disposed at an end of the second passage. , and a valve seat member that interrupts and communicates between the first and second passages depending on the abutment and spacing of the valve member, so that () the installation space required within the mating member is (), and also achieves miniaturization as a whole.

[Example] Next, the solenoid valve according to the present invention will be described in detail with reference to a preferred example thereof. However, the embodiments described below are described to facilitate or accelerate understanding of the present invention, and are not described to limit the present invention. In other words, each member disclosed in the embodiments described below includes all design changes and equivalent substitutions that fall within the spirit and technical scope of the present invention.

FIG. 1 is a sectional view showing an embodiment of the solenoid valve according to the present invention, in which a passage 17 and a passage 19 are communicated with each other, and fluid supplied to the passage 17 is discharged from the passage 19. This indicates the state in which the

FIG. 2 is a cross-sectional view showing the operation of the embodiment shown in FIG. It shows the state of being.

First, with reference to FIGS. 1 and 2, an embodiment of the solenoid valve according to the present invention will be explained.
Its configuration will be explained in detail.

10. A solenoid valve according to the present invention, which includes a solenoid coil 12 wound around a cylindrical coil bobbin 11 having an internal space 11a, and a housing 1 disposed on one end surface of the coil bobbin 11.
3, a housing 14 disposed on the outer peripheral surface of the solenoid coil 12 and the coil bobbin 11, and a housing 15 disposed on the other end surface of the coil bobbin 11 and having a through hole 15a communicating with the internal space 11a. ing.

The solenoid valve 10 also includes a sleeve 16 disposed on the inner peripheral surface of the coil bobbin 11 and a passage (""Outerpassage"
) 17, one end protrudes outward from the housing 15 and the other end secures the sleeve 1.
and an inner member 18 disposed in contact with the inner circumferential surface of 6. A passage (also referred to as an "inner passage") 19 is formed in the inner member 18 from one end to the other end in the direction of extension thereof, and is open to the outside at one end and connected to the sleeve at the other end. 16 internal space and thus the internal space 1 of the coil bobbin 11
It is open to 1a. The inner passage 19 communicates with the outer passage 17 through a communication passage 20 at its middle expanded portion 19a.

The solenoid valve 10 further includes an inner passage 19
The valve seat member 21 disposed in the intermediate expanded portion 19a of
A plunger 22 includes a valve member 22a whose tip end can come into contact with the valve seat member 21, and a magnetic body 22b attached to the rear end of the valve member 22a.
It is equipped with

The solenoid valve 10 additionally has an inner passage 1
A bushing member 23 is disposed at the other end of the valve member 22a and supports the valve member 22a movably in the thrust direction.
and a return spring which is disposed between one end surface of the magnetic body 22b and one end surface of the bushing member 23 and presses the valve member 22a and the magnetic body 22b in a direction away from the bushing member 23 and, in turn, from the inner member 18. 24, and an O-ring 25 disposed at the base of the outer peripheral surface of the protrusion 15A of the housing 15 to ensure a sealing function when attached to a mating member.
and an O-ring 26 disposed on one end of the inner member 18, that is, on the outer peripheral surface of the protrusion 18A protruding from the housing 15, in order to ensure a sealing function when attached to a mating member. A threaded portion 15b for attachment to a mating member is formed on the outer peripheral surface of the protruding portion 15A.

Further, with reference to FIGS. 1 and 2, an embodiment of the solenoid valve according to the present invention will be described.
Its action will be explained in detail.

(“Open” state) When the power is not connected to the solenoid coil 12 and no current is supplied, the plunger 22 is sufficiently separated from the inner member 18 by the return spring 24, and the valve is closed. The tip of the member 22a is spaced apart from the end surface of the valve seat member 21.

Therefore, the fluid supplied as indicated by arrow _A1 to the outer passage 17 formed between the inner peripheral surface of the through hole 15a formed in the housing 15 and the outer peripheral surface of the inner member 18 is After moving along the outer peripheral surface of the inner member 18 as shown in ₂ , the intermediate expanded portion 19 of the inner passage 19 is moved through the communication passage 20.
Reach a.

The fluid that has reached the intermediate expanded portion 19a then passes through the through hole 21 formed in the axial direction of the valve seat member 21 via the gap between the valve member 22a and the valve seat member 21.
Move from a to the inner passage 19 as shown by arrow A ₃ , and then move to the inner passage 1 as shown by arrow A ₄ .
9 is discharged from one end toward a mating member (not shown).

(Transition to “closed” state) When a power source is connected to the solenoid coil 12 and a current is applied, the solenoid coil 12 is excited, and the magnetic body 20b of the plunger 22 moves into the inner space of the sleeve 16 and eventually the inner space of the coil bobbin 11. It is pulled into the interior of the return spring 11a as shown by the arrow X while resisting the spring force of the return spring 24 (see FIG. 1). As a result, the tip of the valve member 22a of the plunger 22 comes into contact with the end surface of the valve seat member 21 (see FIG. 2). Therefore, the fluid provided to the outer passage 17 is transferred from the communication passage 20 to the valve seat member 2.
1 cannot move to the through hole 21a, and cannot move to the inner passage 19.

(“Closed” state) As long as the power is connected to the solenoid coil 12 and current continues to be applied, the solenoid coil 1
2 continues to be excited. Therefore, the tip of the valve member 22a of the plunger 22 continues to be in contact with the end surface of the valve seat member 21, and continues to block the movement of fluid between the outer passage 17 and the inner passage 19 (see FIG. 2).

(Return to "open" state) When the power supply connected to the solenoid coil 12 is cut off and the current is removed, the excitation by the solenoid coil 12 is removed, and the plunger 22 is moved in the direction of arrow Y by the spring force of the return spring 24. , and returns to its original state (see Figure 2).

In the above description, only the case where the outer passage 17 and the inner passage 19 function as an inlet passage and an outlet passage, respectively, has been described, but the present invention is not limited to this, and the outer passage 1
7 and the inner passage 19 function as an outlet passage and an inlet passage, respectively.

Further, when no current is applied to the solenoid coil 12, the valve member 2
Although the description has been made only for the case where the 2a are spaced apart, the present invention is not limited to this.
This also includes the case where the valve member is in contact with the valve seat member when no current is applied to the solenoid coil.

(3) Effects of the invention As is clear from the above, the solenoid valve according to the invention is a solenoid valve that is opened and closed by moving a plunger in accordance with the magnetic force generated by a solenoid coil while resisting the spring force of a return spring. The valve includes: (a) a valve member disposed on one end surface of the plunger; and (b) disposed within a through hole of a housing that accommodates a solenoid coil, the outer circumferential surface of which is aligned with the inner circumferential surface of the through hole of the housing. (c) an inner member forming a first passageway therebetween and including a second passageway formed therein in communication with the first passageway and oriented in the extending direction; The present invention is characterized by comprising a valve seat member disposed at the end of the passage, which interrupts and communicates communication between the first and second passages by abutting and spacing the valve member. ) It has the effect of substantially eliminating the mounting base required in the mating member, and (ii) it has the effect of achieving miniaturization as a whole.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the solenoid valve according to the present invention, FIG. 2 is a sectional view illustrating the operation of the embodiment shown in FIG. 1, and FIG. 3 is a sectional view showing a conventional example. . 10 ... Solenoid valve, 11... Coil bobbin, 11a... Internal space, 12... Solenoid coil, 13, 14, 15... Housing, 15
A... Protrusion, 15a... Through hole, 15b... Threaded part, 16... Sleeve, 17... Outer passage, 1
8...Inner member, 19...Inner passage, 19a...
Intermediate expansion part, 20... Communication passage, 21... Valve seat member, 21a... Through hole, 22... Plunger, 2
2a...Valve member, 22b...Magnetic material, 23...Button member, 24...Return spring, 25,2
6...O-ring.

Claims (1)

[Scope of Claim for Utility Model Registration] In a solenoid valve that is opened and closed by moving a plunger in response to magnetic force generated by a solenoid coil while resisting the spring force of a return spring, (a) disposed on one end surface of the plunger; (b) disposed within the through hole of the housing that accommodates the solenoid coil, the outer circumferential surface forming a first passage between the inner circumferential surface of the through hole of the housing and the first passage; (c) an inner member comprising a second passage formed therein in communication with the flow passage and extending in the direction of extension; (c) an inner member disposed at an end of the second passage; A solenoid valve comprising: a valve seat member which interrupts and communicates between the first passage and the second passage depending on the abutting distance between the solenoid valve and the valve seat member.