JP2506753Y2 - Solenoid valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an electromagnetic valve device in which a movable core is controlled by energizing a coil.

(Prior Art) As a prior art relating to the present invention, there is one described in Japanese Patent Laid-Open No. 63-235778. This conventional solenoid valve device is shown in FIG. This solenoid valve device 50 has a fixed iron core 51 having an input port 51a and an output port 51b, and a sleeve 52 fitted to the fixed iron core 51 to form a fluid flow path. A bobbin 53 made of resin is arranged around the fixed iron core 51, and a coil 54 is wound around the bobbin 53. A movable valve body 55 made of a magnetic material is arranged in the sleeve 26. Movable valve body 55
A plate 56 having an output port 56a is arranged in the right direction (Fig. 4).

(Problems to be Solved by the Invention) Such an electromagnetic valve device is used, for example, for control of a transmission, and is normally immersed in hydraulic fluid in a valve body disposed at the bottom of the transmission. It is housed in. Foreign matter may be mixed in the hydraulic oil, and if this foreign matter enters the solenoid valve device, it may cause malfunction of the solenoid valve device, so-called valve stick, and interfere with transmission control. I got it. Apart from this, when the solenoid valve device constitutes a magnetic circuit, there is a risk that fine foreign particles floating in the hydraulic oil, mostly metal powder, may be sucked and deposited in the solenoid valve device. This may cause malfunction of the transmission. In order to solve such a problem, it is possible to intervene a strainer in a portion that communicates the inside and outside of the solenoid valve device.However, this method increases the number of assembly steps and significantly increases the cost. I was so sorry.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and by providing a new configuration for suppressing the intrusion of foreign matter into the solenoid valve device, the malfunction of the solenoid valve device is caused. It is a technical issue to prevent this.

[Constitution of device]

(Means for Solving the Problem) The technical means used in the present invention for solving the technical problem is a fixed core formed with an input port for inputting a fluid and an output port for outputting a fluid. A coil bobbin arranged so as to surround the fixed core, a coil wound around the coil bobbin, and a movable core slidably fitted in the coil bobbin so as to face the output port of the fixed core. In a solenoid valve device having a valve member fixed to the movable core to control opening and closing of the output port of the fixed core, and a side plate for restricting movement of the movable core, the movable core is a fluid between the output port and the side plate. The side plate is provided with a truncated cone-shaped portion whose diameter becomes smaller as it extends outward from the valve opening direction of the solenoid valve device, and the tip portion having the minimum diameter of the truncated cone-shaped portion has Movable core That is, fluid is communicated between the communication hole and the outside of the solenoid valve device, and an oil hole having the same diameter as the minimum diameter of the truncated cone shape portion is formed.

(Operation) By taking such technical means, when the solenoid valve device forms a magnetic circuit, the diameter of the solenoid valve oil hole has a small truncated cone shape, so that the coil is energized. Of the metal powder that adheres to the solenoid valve device at this time, the metal powder that enters the solenoid valve device through the oil holes is reduced, and it has become possible to suppress the entry of foreign matter into the device.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of the solenoid valve device 1. The electromagnetic valve device 1 includes a cylindrical housing 2 and the housing 2
A fixed core 3 fixed to the opening of the housing 2, a side plate 4 fixed to the other opening of the housing 2, and a side plate 4 connected to the side plate 4,
It has a fixed yoke 5 fixed to the housing 2. The fixed core 3 is formed with an oil hole 3a which communicates both ends thereof, and further has a disk-shaped flange portion 3b extending outward in the radial direction at a substantially middle portion thereof. One of the oil holes 3a serves as an input port 3d and the other serves as an output port e. This flange part 3b
Are locked by the housing 2 and both are in a fixed relationship. A step portion is formed at the tip of the fixed core 3, and a sleeve 6 that forms a fluid flow path is press-fitted into this step portion. A movable core 7 is arranged inside the sleeve 6 so as to be slidable in the axial direction. A side plate 4 is fixed to the opening of the housing 2 opposite to the part where the fixed core 3 is fixed. A fixed core 7 is fixed to the housing 2 so as to be adjacent to the side plate 4. A coil bobbin 9 is arranged around the fixed core 3 and the sleeve 6 fixed to the fixed core 3. The coil bobbin 9 has a concave cross section, and a coil 10 is wound around the concave portion. A groove 12 for accommodating the valve member 11 is formed in the movable core 7,
11 is stuck. In this embodiment, 11 valve balls are used. The fluid outlet of the fixed core 3 is the movable core 7
A valve seat 3c is formed on which the valve member 11 fixed to the seat is seated. The fluid outlet of the fixed core 3 has a diameter smaller than that of the valve member 11. In the embodiment, four movable holes 7a are formed at equal intervals in the movable core 7 so as to connect both ends thereof. The side plate 4 fixed to the housing 2 has a movable core 7
Is a regulating member for regulating the movement in the right direction in the figure. The one shown in FIG. 1 is when the solenoid valve device is in the valve open state.

FIG. 3 is a partial detailed sectional view including the movable core 7 and the side plate 4. The side plate 4 extends inward from the diameter of the movable core 7, and has a slope 4a so as to rise from the extending end. The inclined surface 4a is formed so that its cross section has a truncated cone shape, and the opening is narrowed to a diameter approximately equal to that of the valve member 11. This truncated cone portion forms the oil hole 4b. This truncated cone is designed so that the solenoid valve device opens and converges along the direction in which the fluid flows.

 Next, the operation of the present invention will be described.

The working fluid flows in from an oil hole 3a (left end in FIG. 1) formed in the fixed core 3. In the illustrated state in which electricity is not supplied to the coil 10, the working fluid flows into the working space 13 defined by the fixed core 3 and the movable core 7. Further, it is guided to the outflow port 14 through the communication hole 7a of the movable core 7 and output to the outside of the solenoid valve device.

When the coil 10 is energized, the coil 10 and the fixed yoke
5, the fixed core 3 forms a magnetic circuit, and the movable core 7 is attracted to the fixed core 3. By this operation, the valve member 11 is seated on the valve seat 3c of the fixed yoke 3 to restrict the flow of fluid. As illustrated, the flow of the working fluid flows along the arrow direction F.

In this embodiment, by making the side plate 4 from which hydraulic oil is output into a truncated cone shape and increasing the flow velocity of the output portion, even if foreign matter enters the outflow port 14, the foreign matter can be easily eliminated. .

Further, even if a magnetic circuit is formed by energizing the coil and the side plate is magnetized to adsorb foreign matter (for example, metal powder), the foreign matter is adsorbed to the rising portion of the slope of the side plate, and Never break into.

[Effect of device]

As described above, in the present invention, since the fluid outlet of the side plate that is the regulating member of the movable core has a truncated cone shape,
When the coil is energized, foreign matter such as metal powder mixed in the hydraulic oil does not enter the solenoid valve device, and the factor that hinders the operation of the solenoid valve can be eliminated.

In other words, the valve stick of the solenoid valve device can be prevented,
Further, the device in which the solenoid valve device is used (eg, transmission)
It is possible to prevent the malfunction of. Also, when the coil is de-energized, the diameter of the oil hole is the same as the minimum diameter of the frustoconical portion, so fluid flows smoothly from the communication hole to the outside of the solenoid valve device along the taper of the frustoconical portion. Is discharged to. Therefore, cavitation due to the fluid does not occur near the oil hole.

[Brief description of drawings]

FIG. 1 is a sectional view of an electromagnetic valve device according to the present invention, FIG. 2 is an enlarged sectional view of an essential part of FIG. 1, and FIG. 3 is a sectional view of a conventional electromagnetic valve device. Input port …… 3d, output port …… 3e, fixed core ……
3, coil bobbin …… 9, movable core …… 7, valve member ……
11, side plate …… 4, oil hole …… 4b.

Claims (1)

(57) [Scope of utility model registration request] 1. A fixed core having an input port for inputting a fluid and an output port for outputting a fluid, a coil bobbin arranged so as to surround the fixed core, and a coil wound around the coil bobbin. A movable core that is slidably inserted into the coil bobbin and is disposed so as to face the output port of the fixed core; and a movable core fixed to the movable core to control opening and closing of the output port of the fixed core. In a solenoid valve device having a valve member and a side plate that restricts movement of the movable core, the movable core is provided with a communication hole capable of communicating fluid between the output port and the side plate, and the side plate is an electromagnetic valve. The valve device is provided with a truncated cone-shaped portion whose diameter becomes smaller as it extends outward from the valve opening direction, and the communication hole of the movable core and the electromagnetic valve device are provided at the tip end portion having the smallest diameter of the truncated cone-shaped portion. Out of A solenoid valve device, characterized in that a fluid is communicated with the portion and an oil hole having the same diameter as the minimum diameter of the truncated cone-shaped portion is formed.