JPH0671980U - solenoid valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a solenoid valve in which the solenoid portion has a large electromagnetic force and the valve portion and the solenoid portion can be firmly coupled. [Structure] A leaf spring 3 made of a highly elastic material is assembled between a bobbin 21 of a solenoid portion 2 and a magnetic frame 25. When the valve portion 1 and the solenoid portion 2 are pressed, the claw portion 17 provided on the valve portion 1 and the engagement window 27 provided on the magnetic frame 25 are firmly coupled by the large elastic force of the leaf spring 3. Further, since the magnetic frame 25 can be formed of a material having good magnetic performance regardless of elasticity, the electromagnetic force of the solenoid portion 2 can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid valve.

[0002]

[Prior art]

 An electromagnetic valve in which a valve portion and a solenoid portion, which are separately configured, are coupled by engagement of a claw portion provided on the valve portion and an engagement window provided on a magnetic frame of the solenoid portion is disclosed in, for example, Japanese Utility Model Laid-Open No. 61-571. It is already known from the gazette. This already proposed solenoid valve has the advantage that it can be connected by pressing the valve part and the solenoid part, but in order to firmly connect them, it is necessary to form the magnetic frame with a material with large elasticity.

However, the magnetic material has a small elasticity when the magnetic performance is good, and deteriorates the magnetic performance when the elasticity is large. Therefore, the solenoid valve can be made strong without reducing the electromagnetic force of the solenoid portion. Difficult to combine.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide an electromagnetic valve in which the solenoid portion has a large electromagnetic force and the valve portion and the solenoid portion can be firmly coupled.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention connects a valve part and a solenoid part, which are separately configured, by engaging a claw part provided on the valve part and an engaging part provided on a magnetic frame of the solenoid part. The solenoid valve is characterized in that the solenoid portion is provided with a leaf spring having an elastic force for separating the bobbin around which the coil is wound from the magnetic frame. Further, in order to solve the same problem, a leaf spring has an annular elastic portion, an abutting portion that abuts a magnetic frame radially outward thereof, and a pressing portion and a fixed iron core that abut a radially inner bobbin. And a locking portion that locks to.

[0006]

[Action]

 When the valve part and the solenoid part are pressed, the claw part of the valve part is inserted into the engaging part of the magnetic frame, and when the pressing is released, the elastic force of the leaf spring causes the claw part and the engaging part to engage, and the valve part The solenoid part is joined. In this case, by making the magnetic frame and the leaf spring separate, the leaf spring can be made of a material having high elasticity regardless of the magnetic performance, so that the coupling force between the valve portion and the solenoid portion can be increased. it can.

Further, since the abutting portion of the leaf spring abuts on the magnetic frame and the pressing portion abuts on the bobbin, respectively, the elastic portion therebetween exerts a force toward the magnetic frame to the engaging portion engaged with the fixed iron core. The fixed iron core is pressed against the magnetic frame by the connection of the valve portion and the solenoid portion.

[0008]

【Example】

 1 to 3 show a first embodiment of the present invention. The solenoid valve of the first embodiment includes a valve portion 1 and a solenoid portion 2 which are separately configured, and a solenoid 2 has a leaf spring 3 which will be described later. It is incorporated. The valve body 5 of the valve portion includes a supply valve seat 6 and a discharge valve seat 7 in a passage that connects three ports (not shown), and a supply valve chamber 8 and a discharge valve that are substantially concentric with these valve seats. A chamber 9, a through hole 10 for communicating these valve chambers, and a step portion 16 formed on a pair of side faces, and a claw portion 17 ,. The supply valve element 11 is attached to a movable iron core, which will be described later, of the solenoid section 2. A discharge valve body 12 that opens and closes the discharge valve seat 7 is slidably inserted into the discharge valve chamber 9 and is attached in a direction to close the discharge valve seat 7 by a valve spring 14 that is contracted with the retainer 13. It is energized.

On the other hand, the solenoid portion 2 includes a bobbin 21 around which a coil 20 is wound, a fixed iron core 22 mounted in a center hole of the bobbin 21, a movable iron core 23 attracted to the fixed iron core 22, and a return spring 24 thereof, and An inverted U-shaped magnetic frame 25 and a magnetic plate 26 surrounding them are provided, and the magnetic frame 25 is formed of a material having good magnetic performance, and constitutes an engaging portion for engaging the claw portions 17, ... An engagement window 27 is formed, and the leaf spring 3 is assembled between the engagement window 27 and the bobbin 21.

The leaf spring 3 has an annular elastic portion 31 having an inward taper, abutting portions 32, 32 abutting on the magnetic frame 25 at the outer peripheral edge thereof, and a pressing portion 3 abutting on the coil 20 at the inner peripheral edge. 3, 33, and locking portions 34, 34 that lock with the groove 22a of the fixed iron core 22, and are integrally formed of a highly elastic material. Reference numeral 28 in FIG. 1 is a cover that is capped on the magnetic frame 25.

In the first embodiment, when the valve portion 1 and the solenoid portion 2 incorporating the leaf spring 3 are pressed, the engaging window 27 of the magnetic frame 25, ... .. is inserted, and when the pressing is released, the elastic force of the leaf spring 3 causes the claw portions 17, ... And the engagement windows 27 ,. Since the leaf spring 3 is made of a material having a large elastic force, the connection is strong.

Further, the abutting portions 32, 32 and the pressing portions 33, 33 of the leaf spring 3 are pressed against the magnetic frame 25 and the bobbin 21 by the elastic force of the elastic portion 31 therebetween, so that the fixed iron core 22 Since the locking portions 34, 34 locked in the groove 22 a are displaced toward the magnetic frame 25, the elasticity of the leaf spring 3 presses the fixed iron core 22 against the magnetic frame 25. Therefore, the electromagnetic force of the solenoid portion 2 can be increased by forming the magnetic frame 25 with a material having good magnetic performance and pressing the fixed iron core 22 against the magnetic frame 25.

When the valve portion 1 and the solenoid portion 2 are separated for maintenance or the like, when the valve portion 1 and the solenoid portion 2 are pressed against each other, the engagement between the claw portions 17, ... And the engagement windows 27 ,. Is canceled.

In the first embodiment, on the right side of FIG. 1 in which the coil 20 is not energized, the supply valve body 11 closes the supply valve seat 6 by the urging force of the return spring 24, and the discharge valve body 12 passes. The discharge valve seat 7 is opened by being pressed by a push rod (not shown) that passes through the holes 10. When the coil 20 is energized, the fixed iron core 22 attracts the movable iron core 23, the supply valve body 11 opens the supply valve seat 6, and the discharge valve body 12 closes the discharge valve seat 7 by the urging force of the valve spring 14. (See Figure 1, left side).

FIG. 4 shows a second embodiment of the present invention, in which the movable iron core 36 of the second embodiment has a recess which opens on the supply valve seat 6 side, and the supply valve slidably inserted into the recess. The body 37 is urged toward the supply valve seat 6 by an overtravel spring 38, and a locking member 39 attached to the movable iron core 36 prevents the body 37 from jumping out from the recess. Since the other structure and operation of the second embodiment are the same as those of the first embodiment, the same reference numerals are given to the main parts of the drawing, and the detailed description will be omitted.

[0016]

[Effect of device]

 In the solenoid valve of the present invention, a leaf spring is provided between the magnetic frame of the solenoid portion and the bobbin, and the leaf spring is elastic regardless of the magnetic performance by connecting the valve portion and the solenoid portion by the elastic force. Since it can be made of a large material, the coupling force between the valve section and the solenoid section can be increased. In addition, the magnetic frame can be made of a material with good magnetic performance regardless of elasticity, and the fixed iron core is pressed against the magnetic frame by the elastic force of the leaf spring due to the coupling of the valve part and the solenoid part. The electromagnetic force can be increased.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of a leaf spring.

FIG. 4 is a vertical sectional view of a second embodiment.

[Explanation of symbols]

 1 Valve part 2 Solenoid part 3 Leaf spring 17 Claw part 21 Bobbin 25 Magnetic frame 27 Engaging window 31 Elastic part 32 Abutting part 33 Holding part 34 Locking part

Claims (2)

[Scope of utility model registration request] 1. A solenoid valve in which a valve portion and a solenoid portion are separately formed by engaging a claw portion provided on the valve portion and an engaging portion provided on a magnetic frame of the solenoid portion, The solenoid valve is characterized in that the solenoid portion is provided with a leaf spring having an elastic force that separates the coil bobbin and the magnetic frame from each other. 2. A member for engaging a leaf spring with an annular elastic portion, an abutting portion that abuts a magnetic frame radially outward, a retainer portion that abuts a bobbin radially inward, and a fixed iron core. The solenoid valve according to claim 1, further comprising a stop portion .