JPH06241340A - Solenoid valve - Google Patents

Abstract

PURPOSE:To finish components with a high degree of accuracy so as to enhance the controllability of a solenoid coil for driving a ball, by forming a bobbin of the solenoid coil in which a seat surface and a bore diameter shoulder part and the like are integrally incorporated one another with the use of resin. CONSTITUTION:A ball 4 located in a casing 5 is adapted to be reciprocated by a plunger which is moved an electromagnetic force given by a solenoid coil 2 and a spring 11. Further, the ball 4 is engaged with and disengaged from a seat surface 1d provided in a hydraulic oil feed or discharge passage so as to distribute, feed and discharge hydraulic oil. In this arrangement, a bobbin 1 constituting the solenoid coil 2 is formed by integrally incorporating the seat surface 1d and a guide 3 for limiting the radial motion of a plunger 6. Further, a space 1e in which the ball 4 is moved, and a shoulder part 1c composed of a large diameter part 1b and a small diameter part 1a are formed. Further, the plunger 6 is inserted into the small diameter part la, and a stator 7 forming a part of a magnetic path is inserted in the diameter part 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a poppet type hydraulic solenoid valve for an electronically controlled automatic transmission of an automobile.

[0002]

2. Description of the Related Art There are many kinds of poppet type hydraulic solenoid valves for automobiles. For example, 3 port 2
For the position poppet type hydraulic solenoid valve,
As shown in FIG. 14, a plunger 6 integrally caulked with a pin 13 whose tip abuts on a ball 4 movably arranged in the casing 5 in the up-and-down direction is moved in a sleeve 56 by an electromagnetic force of a spring 11 and a solenoid coil 2. It is designed to go up and down. An actuator in which a T-port side seat surface 41 that communicates with the T-port and a P-port side seat surface 42 that communicates with the P-port are provided facing each other with the ball 4 sandwiched therebetween, and a space 43 for holding the ball is not shown. It is adapted to communicate with an A port for supplying and discharging pressure oil.

When the solenoid coil 2 is not energized, the ball 4 is seated on the P port side seat surface 42 by the spring 11 via the plunger 6 so that the A port and the T port are in communication. Also, when the solenoid coil is energized. The electromagnetic force causes the plunger 6 to overcome the force of the spring 11 and be attracted upward, and the ball 4 also moves upward so that the ball is seated on the seat surface 41 on the T port side so that the A port and the P port communicate with each other. The switching of the pressure oil flow path is performed by.

Conventionally, such a 3-port 2-position poppet type hydraulic solenoid valve has a P-port side seat 44a having a P-port side seat surface 42, a recess forming a space 43 for moving the seat and the ball, or A T port side seat 44b having a T port side seat surface integrated with the recess, a lower end abutting on an upper surface 44c of the T port side seat 44b and an upper end abutting on a lower end 3a of the guide 3,
Between the T-port side seat 44b and the guide 3, the T-port space 4
6, the flange portion 5a of the casing constituting the 6, the plunger 6
Restricts the radial movement of the solenoid coil 2
Of the cylindrical casing 5 is formed by sequentially stacking the guide 3, the coil bobbin 45, the terminal cover 30, the wave spring 47, and the lid 10 that are in contact with the lower end surface 45a of the coil bobbin 45 that is wound around to form a magnetic path. It is fixed by caulking at the upper edge.

The wave spring 47 between the terminal cover 30 (coil bobbin 45) and the lid body 10 stabilizes the axial direction of assembly. The terminal cover 30 is for preventing a short circuit between the coil and the lid or casing, and there is also a terminal cover 30 integrally formed with the coil bobbin. The stator 7 at the upper end of the plunger 6 is fixed to the casing 5 side described above. A magnetic circuit is formed by the casing 5, the guide 3, the plunger 6, the stator 7, and the lid 10.

The performance of the solenoid valve having such a structure is determined by the amount of movement of the plunger and the ball. In the plunger 6, the ball 4 has the seat surface 42 on the P port side.
The lower limit is the position seated on the upper limit and the upper limit is the position contacting the stator 7. Therefore, the plunger stroke is the length between the upper end 48 of the plunger and the lower end 49 of the stator in FIG. The dimension of the lower end of the plunger is determined by the dimensions of the ball 4, the pin 13 and the plunger 6 from the P-port side seat surface 42. The dimension of the lower end of the stator is from the P-port side seat surface 44c to the T-port side seat 44b, from the lower end of the casing collar portion 5a to the upper casing portion 5c.
It depends on the cumulative dimensions of the lid 10 and the stator 7.
The vertical movement stroke of the ball 4 is a length between the position of the P-port side seat and the position of the ball seated on the T-port side seat.

Further, a case of a 2-port 2-position poppet type hydraulic solenoid valve will be briefly described. As shown in FIG. 13, a plunger 6 in which a ball 4 is swaged and integrated is formed of a spring 11 and a solenoid coil 2. The seat 5 is designed to move up and down in the sleeve 56 by an electromagnetic force, and has the high-pressure port 51 at the center.
The space 53 above 2 communicates with the low-pressure port 53a side. Spring 1 when solenoid coil 2 is not energized
The ball 4 at the tip of the plunger is seated on the seat 52 by 1 to close the high pressure port 51. When the solenoid coil is energized, the plunger 6 overcomes the spring force and is attracted upward by the electromagnetic force, the ball 4 is separated from the seat 52, and the pressure oil from the high pressure port is communicated with the low pressure side. Switching is performed.

The lower end 55 of the casing 5 holds the upper end peripheral portion of the seat 52 and is caulked, and the casing 5 has a flange 5a adapted to form a ball holding portion and a low pressure side space 53 on the seat surface. , Collar part 5a from above
, A coil bobbin 54, and a stator 58 having a T-shaped cross section, which abuts on the upper end surface of the coil bobbin, are sequentially laminated, and the tubular casing upper portion and the stator upper edge portion are caulked and fixed. Therefore, the plunger stroke in the case of FIG. 13 is the length between the upper end 48 of the plunger and the lower end 49 of the stator as in the case of FIG.
The dimension of the upper end of the plunger is the ball 4 from the seat surface 52a.
And plunger dimensions. The lower dimension of the stator is determined by the seat surface 52a, the lower end of the casing collar 5a to the upper casing 5c, and the cumulative dimension of the stator 58. Further, the vertical movement stroke of the ball 4 depends on the position where the ball is seated on the seat and the plunger 6
Is the length between the position where the abuts on the stator 58. The terminal cover 30 shown in FIG. 14 is integrated with the coil bobbin, and the sleeve 56 is inserted between the stator 58 and the coil bobbin 54.

Next, the electrical connection will be described. In the simple case, as shown in FIG. 14, a lead wire for external connection is provided at one end of the solenoid coil, and the crimp terminal 15 or the like is used for this to electrically connect to the outside. However, since workability is poor in this method, as shown in FIGS. 11 to 13, the housing 59 of the female adapter of the male and female adapter of the plug-in is attached to the upper portion of the solenoid valve, and the lead wire 60 from the solenoid coil 2 is attached. The one that is connected to the connector terminal 61 has been used. However,
If the housing is assembled before the winding work of the solenoid coil, an unbalanced load is applied during the winding work, so that the bobbin 54 vibrates, the winding of the solenoid coil 2 is disturbed, and the outer diameter of the solenoid coil 2 becomes large. Become. Therefore, it may interfere with the inner diameter portion 55a of the casing, and the insulation of the solenoid coil 2 may deteriorate. If the terminal 61 connected to the wound solenoid coil or the housing 59 of the connector is improperly fixed, in the subsequent working process,
The solenoid coil 2 is always pulled by the weight of the parts, and there is a possibility that the wires may be broken by being hooked on other parts or working devices.

Therefore, the connector portion is attached at the final stage of the solenoid valve assembling work. Figure 11
As shown in FIG. 13, before mounting the housing 59, one end of the solenoid coil 2 is connected to the connection terminal 6 by soldering or the like.
1 and the other end of the connection terminal is joined to the lead wire 60 by caulking or the like, the lead wire 60 is joined by soldering or the like to the connector terminal 61 inserted into the housing 59, and then to the housing 59. The housing 59 was fixed to the solenoid valve by inserting the bisected tongue-shaped fixing metal fitting 62 welded to the outer end surface 58d of the stator 58 into the slit 59b provided and deforming the same. The connecting portion between the terminal 61 and the lead wire 60 is connected to the housing 59 by the claw 59c.
The cover 59a is fitted to the three sides so as to surround the three sides, and shields the exposed electric contacts from the outside. The other end of the coil is connected to the ground terminal 2a, and the ground terminal is attached to the stator 58 and is grounded to the main body.

[0011]

A poppet type hydraulic solenoid valve for an electronically controlled automatic transmission of an automobile is required to have high-speed response and high precision control.
Further, it is desired that it is suitable for mass production and that there is no variation in performance. In order to ensure this performance, it is required to reduce variations in vertical movement strokes of the ball, to make the vertical movement stroke of the ball shorter than the plunger stroke, and to match the plunger stroke as much as possible. However, as described above, in the configuration of the conventional poppet type hydraulic solenoid valve, the stroke of the plunger largely varies because the dimensional error and the assembly error of each component are accumulated, and the high precision control of the solenoid valve and the However, there is a problem that stable characteristics cannot be obtained during mass production.

Therefore, in order to reduce the variation in the plunger stroke, the adjusting screw 50 is provided on the stator 7 as shown in FIG. 14 so that the plunger stroke can be adjusted, or in the case shown in FIG. 13, the stator neck is adjusted. I prepared several items with different lower dimensions, selected them and assembled them. However, the above-mentioned measures for improving the accuracy of the stroke dimension and the measures for preventing the solenoid coil from breaking so that the solenoid coil can be wound securely and have no breakage are all related to the assembly process and the number of parts. However, there is a problem in that there is still a large variation in performance, it is difficult to obtain stable performance, which is not suitable for mass production and the cost increases.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make it possible to assemble plunger strokes easily and surely without variation and to disconnect the wire. It is suitable for mass production because it is easy to assemble without worrying about
An object of the present invention is to provide a poppet type hydraulic solenoid valve having stable characteristics.

[0014]

In order to achieve the above object, in the present invention, a bobbin constituting a solenoid coil is integrally formed with the one seat surface and a guide for restricting radial movement of the plunger. A bobbin formed of resin into a small space above the inner diameter portion of the guide having the same space as the inner diameter of the guide and the space in which the ball moves, including the seat surface, and the sliding surface of the plunger. A small diameter portion, a large diameter portion having an inner diameter larger than that of the small diameter portion, and a shoulder portion formed of the large diameter portion and the small diameter portion, and the plunger is slidably inserted into the small diameter portion. An upper end of the stator is abuttable and forms a part of a magnetic path, and the stator is inserted into the large-diameter portion up to the shoulder position.

The shoulder portion and the seat surface portion are molded by a molding die when molding the resin of the bobbin.

In the case of a 3-port 2-position solenoid valve, the space in which the ball moves forms a seat surface facing the upper and lower sides of the ball by the second-stage seat abutting the bobbin end surface.

Further, the shoulder portion, the low pressure side seat surface portion, the lower end surface of the bobbin and the second seat surface portion are molded by a molding die during resin molding of the bobbin.

An axial direction different from the axial force that urges the stator to contact the bobbin shoulder portion by applying an axial force to the shoulder portion and urges the stator to both ends of the bobbin crimped at both ends of the casing. It has a wave spring or a flat spring that applies a force.

The female connector of the male / female connector for electrical connection can be divided into a current-carrying side portion and a male connector fitting portion, and the current-carrying side portion is resin-molded integrally with the bobbin and wound around the bobbin. Electrically connected with the coil.

[0020]

The plunger stroke is determined by the dimensions of the components such as the seat surface, balls, plunger, stator, etc., and the assembly dimensions. In the case of a 2-port 2-position solenoid valve, one seat surface is integrally formed with the seat surface facing upwards facing the bobbin side. The dimension of the lower end of the plunger is determined by the integrally formed seat surface, the ball and the dimension of the plunger. The dimensions of the upper end of the plunger are determined by the stator. The stator is in contact with the inner diameter shoulder portion of the bobbin formed integrally with resin, and as a result, the size of the seat surface and the shoulder portion integrally provided on the bobbin is determined. As described above, since the upper and lower positions of the plunger are determined on the basis of one seat surface, the plunger stroke is determined by the size between the seat surface integrally formed with the bobbin and the shoulder portion.

At the time of forming the bobbin, one sheet surface and the holes into which the plunger and the stator are inserted are simultaneously formed by a forming die. Therefore, the length from the shoulder portion of the hole into which the stator enters to the one sheet surface is determined by the size of the molding die, so that the accuracy of each size is further improved.

In the case of a 3-port 2-position solenoid valve, the space in which the ball moves is formed with a recess opening at the lower end surface of the bobbin, and one seat is integrated above the recess so that the seat surface faces downward. Is molded into. The second-stage sheet is brought into contact with the end surface of the bobbin. The dimension of the lower end of the plunger is determined by the dimensions of the seat, the ball, the pin, the plunger, etc. of the second stage that contacts the lower end of the bobbin.
On the other hand, the size of the upper end of the plunger is determined by the stator, but the stator is in contact with the inner diameter shoulder portion of the bobbin that is integrally molded with resin, and as a result, the seat surface and shoulder portion of the one integrally provided on the bobbin are Determined by dimensions. In this way, the dimensions of the upper and lower positions of the plunger are determined on the basis of the one seat surface, and therefore the plunger stroke is the dimension between the one molded seat surface and the shoulder and the one seat surface and the second-stage seat. It depends on the dimension between the end faces of the bobbin.

At the time of forming the bobbin, one sheet surface, the bobbin end surface, the hole for receiving the plunger and the stator are formed at the same time. At this time, the length from the end surface of the bobbin to the shoulder of the hole into which the stator is inserted and the length from the end surface of the bobbin to one sheet surface are determined by the dimensions of the molding die, so the accuracy of each dimension is Get better. Further, the positional accuracy between the P-port side seat and the seat B at the time of assembly is improved.

The bobbin and the stator are pressed by two kinds of separate forces by one spring. The inner part of the spring acts to press the stator against the bobbin shoulder and the outer part acts to prevent axial movement of the entire bobbin, ensuring caulking by the casing. Also, since a flat or wave washer is used that does not reduce the outer diameter of the stator,
There is no restriction on the magnetic path area.

Since the current-carrying side portion of the female connector is integrally resin-molded with the bobbin, the coil and the terminal of the current-carrying portion can be connected by soldering or caulking without using lead wires or the like. Further, since there is no movable part, vibration does not occur when the coil is wound, and it is not caught during work.

[0026]

EXAMPLES Examples will be described with reference to the drawings. 1 to 3 show a first embodiment of the present invention, which is an embodiment of a 2-port 2-position solenoid valve. Figure 1
In FIG. 3, the bobbin 1 is integrally molded with the solenoid coil 2, the winding portion 1k, the guide 3, the seat surface 1d of the ball 4, the seat 1g having the port portion, and the connector mounting portion 1h by resin molding. The solenoid coil is wound.

The inner diameter portion of the bobbin has a small diameter portion 1a on the lower side and a large diameter portion 1b on the upper side, and the shoulder portion 1 is at the boundary between the small diameter portion and the large diameter portion.
have c. The guide 3 is made of a magnetic material and constitutes a part of the external magnetic path of the solenoid coil. The seat 1g forms a space 1e in which the ball 4 moves, which communicates with the outlet port, and has a seat surface 1d on which the ball can be seated, and an inlet port 1f which communicates with the seat surface 1d. It is formed so as to ensure the dimensional accuracy of the dimension L between the seat surface 1d and the shoulder portion 1d of the inner diameter of the bobbin. The connector mounting portion 1h is integrally resin-molded with a coil bobbin together with a conductive member 31 for connecting to an external solenoid valve drive signal. One end of the conductive member 31 on the coil side is a solenoid coil 2 wound around a bobbin winding portion. Is connected to the end of the device by soldering, welding, crimping, or the like. Similarly, the other end of the solenoid coil 2 is connected to the ground terminal 2a, and the ground terminal 2a is welded to the lid 10 and grounded.

The bobbin is inserted into the casing such that the end of the guide 3 of the bobbin 1 is in contact with the lower end step 5a of the casing 5 that houses the entire valve. The bobbin inner diameter small diameter portion 1a is provided with a plunger 6 slidably provided in the axial direction. The plunger 6 has a shaft hole 6a at the lower end, and the ball 4 is fixed by caulking or the like, and the ball 4 is arranged so that it can be seated on a seat surface 1d integrally formed with the bobbin. A stator 7 made of a magnetic material is inserted into the bobbin inner diameter large diameter portion 1b concentrically with the plunger 6, and a spacer 8 made of a non-magnetic material is sandwiched between the stator 7 and the plunger 6. Holes 6b and 7b are respectively provided in the axial directions of the attraction surfaces of the plunger 6 and the stator 7, and the holes 6b
A spring 11 made of a non-magnetic material is attached to b and 7b.

A coil spring 9 is attached to the small diameter portion 7a on the upper portion of the stator.
Is installed. A substantially ring-shaped lid 10 made of a magnetic material that escapes the small-diameter portion 7a of the stator 7 is sandwiched between the upper casing 5c and the upper caulking portion 5b of the casing, and the lid 10 causes the coil spring 9 to move toward the stator. It is supposed to be urged. A bobbin 1 in which a solenoid coil 2 is wound between a lower end step portion 5a and an upper crimp portion 5b of a casing 5, a stator 7, a coil spring 9, and a lid body 10.
Are sequentially laminated, and are fixed and sealed in the axial direction by the coil spring 9. Between the stator 7 and the bobbin seat surface 1d,
The ball 4, the plunger 6, and the spring 11 are clamped,
The ball 4 is pressed against the seat surface 1d by the spring 11 and is seated.

Casing 5, guide 3, plunger 6,
A magnetic path is formed by the stator 7 and the lid 10. The plunger 6 is attracted to the stator 7 with the spacer 8 sandwiched by exciting the solenoid coil 2, and the plunger 6 is separated from the stator when demagnetized.

When no current is flowing in the solenoid coil 2, the seat surface 1d is moved to the ball 4 by the force of the spring 11.
Since it is blocked by, the pressure oil in the inlet port 1f does not flow into the outlet port. The working pressure of the solenoid valve according to the present invention is generally low, and the working pressure is lower than the spring force 11. On the other hand, when a current flows through the solenoid coil 2, the plunger 6 and the ball 3
Is attracted upward against the spring 11, and the ball leaves the seat surface 1d. At this time, the pressure oil in the inlet port 1f flows out to the outlet port 1e through the space between the seat surface 1d and the ball.

FIGS. 5 to 6 show a second embodiment of the present invention, which is applied to a 3-port 2-position solenoid valve. The same components as those in the first embodiment have the same reference numerals as those in FIG. 5 and 6, the bobbin 21 includes a solenoid coil 2 winding portion 21k, a guide 3, a T port side sheet 21n, a low pressure void portion 21p provided between the guide 3 and the T port side sheet 21n, and a T port side sheet surface. 21
An opening concave portion 21q that forms a downward concave portion including d is integrally molded with the resin, and the solenoid coil 2 is provided in the winding portion.
Is wound.

The inner diameter portion of the bobbin has a small diameter portion 21a on the lower side, a large diameter portion 21b on the upper side, and a shoulder portion 21c at the boundary between the small diameter portion and the large diameter portion. The guide 3 is concentrically provided on the lower side of the small diameter portion 21a and constitutes a part of the external magnetic path of the solenoid coil. The T port side seat 21n has a seat surface 21d on the lower surface on which the ball 4 can be seated, a low pressure void 21p communicating with the T port and an opening recess 21q at the bottom. In particular, it is formed so as to ensure the dimensional accuracy of the dimension L1 between the T-port side seat surface 21d and the shoulder portion 21c into which the stator 7 enters, and at the same time, is provided so as to face the T-port side seat surface 21d and this seat surface. Bobbin 2 with which P port side seat 12 abuts
It is formed so that the dimensional accuracy of the dimension L2 up to the lower end surface 21m of 1 can be secured.

A P-port side seat 12 which is a disk-shaped non-magnetic member is provided in the lower step portion 5a of the casing 5 which houses the entire valve.
Is bent by fixing the lower end portion 5d of the casing and fixed by caulking, and the lower end surface 21m of the bobbin 21 is attached to the seat upper surface 12b.
The bobbin 21 is inserted into the casing 5 so as to abut. The ball 4 is arranged in the opening recess 21q including the P-port side seat 12 and the T-port side seat surface 21d so that the ball 4 can be seated on the P-port side seat surface 12a or the T-port side seat surface 21d. A plunger 26 provided with a pin 13 that comes into contact with the ball 4 is axially slidably inserted into a small diameter portion 21a of the bobbin, and a stator 7 is inserted into a large diameter portion 21b of the bobbin. The spring 11 abuts on one end of the plunger 26 and urges the spring hole 7b of the stator 7 to be assembled. The terminal cover 30, the wave spring 29, and the lid 10 are sequentially laminated by contacting the small diameter portion 7a 'of the stator 7 and the step portion 7c' of the bobbin 21 and the upper end portion 21s of the bobbin 21. It is fixed between the parts.

The wave spring 29 causes the bobbin 21 to abut on the P-port side seat upper surface 12b, and the stator 7 to abut on a shoulder portion 21c inside the bobbin 21 to be fixed in the axial direction. The P-port side seat 12 is attached in contact with a valve block or the like (not shown) that supplies and discharges pressure oil, but a seal formed of an elastic material to prevent pressure oil from leaking between the valve block and the P-port side seat. A plate 14 is attached.

Casing 5, guide 3, plunger 2
6, the stator 7 and the lid 10 are made of a magnetic material and form a magnetic path. The terminal 15 is connected to an external solenoid valve drive signal, and is connected to the end of the solenoid coil 2 wound around the bobbin winding portion by soldering, welding, crimping, or the like. The terminal portion 15 may have the connector mounting portion 1h integrated with the bobbin as in the first embodiment.

When no current is flowing through the solenoid coil 2, the plunger 26, the pin 13 and the ball 4 are pushed down by the spring 11 until the ball completely closes the seat surface 12a of the P-port side seat 12. The oil flow at this time does not flow because the pressure oil from the P port extends from the center hole 14a of the seal plate 14 to the seat surface 12a of the P port side seat, but the ball 4 completely seals the hole. . Also, the pressure oil on the A port side is
From the seal plate 14 side hole 14b, through the side hole 12c of the P port side seat 12, the P port side seat 12 and the opening recess 21q between the T port side seat 21n of the bobbin,
It flows through the gap between the ball 4 and the seat surface 21d into the low pressure void 21p, and then out through the T port hole formed in the casing 5.

On the other hand, when a current flows through the solenoid coil 2, the plunger 26, the pin 13, and the ball 4 are attracted upward against the spring 11, and the ball 4 leaves the seat surface 12a of the P-port side seat, and the bobbin side. Sit on the seat surface 21d. At this time, the flow of oil is such that the pressure oil of the P port passes from the seal plate center hole 14a, through the gap between the seat surface of the P port side seat and the ball 4, through the downward opening concave portion 21q of the bobbin, and in the P port side seat. Side hole 12
c, through the side hole 14b of the seal plate to reach the A port.

Conventionally, each component fixed by the casing 5 is prevented from axial vibration by a single flat or wave spring. However, as described above, in the present invention, since the shoulder portion is provided on the inner diameter of the bobbin formed by resin molding with one sheet and the stator is brought into contact with the shoulder portion, both the bobbin and the stator are fixed. It is necessary to devise. Therefore, in FIG.
A coil spring 9 is provided between 0 and the stator 7 so that the stator 7 abuts on the inner diameter shoulder portion 1c of the bobbin. The caulking force of the case sizing is the lid body 10, the spring 9, the stator step portion 7c, the stator 7, the bobbin shoulder portion 1c, the bobbin 1,
The spring 9 works by the guide 3 integrally formed with the bobbin and the lower end step portion 5a of the casing, and prevents a gap in the axial direction from occurring.

However, in this case, since the spring 9 is inserted between the lid 10 and the stator 7, the stator 7 requires the vertically elongated small diameter portion 7a. Therefore, the area of the magnetic path is reduced, and the magnetic saturation reduces the attractive force.
Further, a new problem arises that the surface pressure on the shoulder of the inner diameter of the bobbin becomes excessive. Therefore, as described above, the axial fixing is performed by using one wave spring or flat spring that biases the stator and the bobbin in the axial direction with different forces.

9 to 10 show the first embodiment of claim 3 relating to this axial fixing structure. FIG. 9 shows the same two-position two-port valve as in FIG. 2, and the stator pressing spring portion is different from that in FIG. The terminal portion is omitted. As shown in FIG. 10, the small-diameter portion 7 of the stator 7
As shown in FIG. 9, the outer edge portion 16b of the elastic thin flat spring 16 formed by cutting out the inner diameter portion 16a so as to allow a'to escape and cutting out a part of the outer shape into a donut-shaped disc shape,
It is crimped by being sandwiched between the casing 5 and a lid 20 having an inner diameter equal to the outer diameter portion of the stator. The inner diameter portion 16a of the flat spring 16 is in contact with the step portion 7c 'around the small diameter portion 7a' of the stator 7. Then, the elastic force of the flat spring fixes the casing upper portion caulking portion 5b, the flat spring 16, the lid 20, the terminal cover 30, the bobbin 1, the guide 3 integrally formed with the bobbin, and the lower end step portion 5a of the casing in the axial direction. Is
Further, the stator 7 and the bobbin shoulder 1c are axially fixed by different forces. Therefore, the pressure on the shoulder of the bobbin inner diameter is reduced, deformation of the shoulder can be eliminated, and the magnetic path area of the stator can be secured.

FIGS. 7 and 8 show a wave spring according to the second embodiment of the present invention used in FIG. In the method according to FIG. 9 described above, a flat spring is sandwiched between the casing 5 and the lid body 20,
Although the elasticity of the flat portion of the flat spring is used, in the second embodiment, a double wave spring is sandwiched between the lid and the terminal cover (or bobbin) and between the lid and the stator. 7,
In FIG. 8, the wave spring 17 has a plurality of wavy shapes 1 in the axial direction.
8 has two wave springs coaxial with each other, which are different in spring force between the outer ring 17a and the inner ring 17b on the same plane, and the outer ring and the inner ring of the wave springs are integrated by a radial connecting portion 19. ing. As shown in FIG. 5, the lid 10
Is fixed between the casing upper step portion 5c and the casing upper portion caulking portion 5b, and the outer ring 17a of the wave spring 17 is sandwiched between the lid body 10 and the bobbin 21 via the terminal cover 30, and the lid body 10 and the stator 7 are fixed. The inner ring 17b of the wave spring 17 is sandwiched between the bobbin and the stator, and different loads are applied to the bobbin and the stator at the same time.

1 to 4 show an embodiment of claim 4 of the present invention. As shown in FIG. 1, an axial portion 31 a of an L-shaped flat conductive member 31 having a connection portion with a solenoid coil 2 wound around a bobbin 1 is resin-molded integrally with the bobbin 1. The L-shaped flat conductive member 31 integrally molded with the bobbin 1 has a plate-shaped outer periphery in the axial direction, and as shown in FIG. The connector mounting portion 1h is provided, and a claw 33b adapted to be locked in the axis-perpendicular direction is provided at the end of the plate-shaped connector mounting portion 1h. A guide plate with a claw in which the portion 31b perpendicular to the axis of the L-shaped conductive member is exposed at a position slightly closer to the coil than the end 33a of the plate-shaped connector mounting portion 1h and extends parallel to the L-shaped conductive member 31b. 33c and a guide plate 33d are sequentially provided. The claw guide plate 33c is provided with a claw 33e that projects in the width direction and is locked in the direction perpendicular to the axis.

The rectangular tube-shaped connector 32 is provided with a substantially cruciform hole 34, and the lateral width of the central portion 34a of the cruciform hole is made equal to the width dimension of the guide plate 33c with a claw of the connector mounting portion 1h. There is. The bobbin side of the connector 32 is provided with a fitting portion 35 that crosses the upper portion of the vertical hole of the cross-shaped hole to form a T-shaped hole, and the connector mounting portion 1h is fitted along the T-shaped hole. ing. On the upper portion of the fitting portion 35, a claw 33b provided on the end surface of the connector mounting portion 1h.
An indentation 32c into which is fitted is provided.

An upper guide plate 32a separated by a T-shaped hole longitudinal hole 34b is provided below the center of the T-shaped hole of the fitting portion 35, and further, the guide plate 3 with a claw of the connector mounting portion 1h is provided.
A lower guide plate 32b is provided so as to sandwich 3c with the upper guide plate 32a. Also, the lower guide plate 3
2b is sandwiched by a claw-guided plate 33c and a guide plate 33d. The width of the fitting portion 32d of the claw guide plate 33c between the upper and lower guide plates of the connector 32 is substantially the same as that of the claw guide plate, and the concave portion 32f into which the claw of the claw guide plate fits is formed. It is provided in the width direction.

As shown in FIG. 1 or 4, in the assembled state, the upper and lower guide plates 32a and 32b, the claw-guide guide plate 33c and the guide plate 33d are alternately fitted to absorb the play in the vertical direction. Is being done. In addition, the claw 33b provided at the end of the connector mounting portion 1h, the recess 32c of the connector fitting portion, and the claw 33 of the guide plate 33c with a claw.
The recessed portion 32f provided in the width direction is engaged with the fitting portion 32d between the connector e and the upper and lower guide plates of the connector so that the connector 32 and the connector mounting portion 1h cannot be easily separated, and a female connector is formed. It With this configuration, the rectangular tubular connector portion 32 of the female connector can be mounted at the final stage of valve assembly. Then, by fitting a male connector (not shown) into the assembled female connector, the coil of the solenoid valve can be electrically connected to the outside.

The ball 4 is generally made of a magnetic or non-magnetic steel material, but has excellent durability such as fluororubber having an increased hardness for the purpose of cost reduction and noise reduction. Resins can be used instead.
The sheet integrally formed with the bobbin may be formed of the same material as the bobbin at the same time as shown in FIG. 3 or may be made of a different material such as metal as shown in FIG. . In addition, positioning accuracy and durability at the time of molding are heat resistant, hard, and have a small heat shrinkage ratio, for example, a linear PPS resin (polyphenylene sulfide resin) Is further improved. If a glass fiber-containing material is used, the effect is further enhanced.

[0048]

Since the present invention is configured as described above, it has the following effects.

The space between one seat surface of the bobbin and the inner diameter shoulder portion of the bobbin is integrally molded with resin, and the end surface of the bobbin is also integrally molded in the case of 3 ports. Since the dimension between the seat surface of the second stage and the shoulder of the bobbin is finished with high accuracy, dimensional accuracy can be secured simply by assembling as parts of fixed dimensions without measuring the dimensions of each part, especially the plunger stroke, It is possible to improve the dimensional accuracy of both the ball stroke and the controllability of the solenoid valve. Since a mold is used during resin molding to ensure high-precision dimensions, there is no variation between parts and it is more suitable for mass production.

Further, since the ball moving and holding space opposed to the seat surface and the oil flow path are also integrally resin-molded, complicated processing parts can be omitted. Further, when the linear PPS resin is used, strength is improved. As a result, the sleeve conventionally provided between the bobbin and the plunger becomes unnecessary, resulting in a significant cost reduction.

Since the axial force generated by the caulking of the casing is urged at a value corresponding to the required axial force of each of the bobbin pressing force and the stator pressing force,
The axial force on the bobbin side did not become insufficient, there was no play between the casing, guide, stator, second-stage seat, etc., and there was no malfunction and durability was improved. Further, the axial force on the stator side is not so great that the shoulder portion of the bobbin is excessively pressed and is not crushed or damaged, so that the solenoid valve having much higher durability is provided.

Conventionally, two springs which are required have a simple structure.
Plate springs such as individual wave springs or flat springs are used, and different spring forces are applied, so there is no need to reduce the magnetic path area by reducing the diameter of the stator. , Has decided to provide a solenoid valve with good magnetic efficiency. Also, the cost is reduced, and moreover, spring assembly,
In addition, positioning becomes easy and accuracy can be secured.

The female connector housing is separated into a bobbin-integrated resin-molded plate-shaped connector mounting portion and a rectangular tube-shaped connector portion, and the plate-shaped connector mounting portion is small and has a small unbalanced load, and has no vibrating portion or loose portion. Therefore, when the solenoid coil is wound around the bobbin, the bobbin will not vibrate and the winding of the electromagnetic coil will not be disturbed, and the outer diameter of the electromagnetic coil will not increase and will not interfere with the inner diameter of the casing. The insulation does not deteriorate. Further, in the work process after winding, the electromagnetic coil is not continuously pulled by the weight of the parts or hooked on other parts or the working device, so that the trouble due to disconnection is drastically reduced.

As described above, according to the present invention, the plunger strokes can be assembled easily and surely without variation, the assembly is easy, there is no fear of disconnection, the number of parts is small, and mass production is possible. The present invention provides a poppet type hydraulic solenoid valve having suitable and stable characteristics.

[Brief description of drawings]

FIG. 1 is a top view of a first embodiment of the present invention.

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

FIG. 3 is a sectional view of the bobbin in FIG.

FIG. 4 is a perspective view of a portion excluding a case in FIG.

FIG. 5 is a sectional view of a second embodiment of the present invention.

6 is a cross-sectional view of the bobbin in FIG.

FIG. 7 is a plan view of the wave spring used in FIG.

8 is a perspective view of the wave spring of FIG. 7. FIG.

FIG. 9 is a sectional view of a third embodiment of the present invention.

10 is a perspective view of a flat spring used in FIG. 9. FIG.

FIG. 11 is a top view of a conventional poppet type solenoid valve (2 ports, 2 positions).

FIG. 12 is a side view of FIG. 11.

13 is a cross-sectional view taken along the line BB of FIG.

FIG. 14 is a sectional view of a conventional poppet type solenoid valve (3 ports, 2 positions).

[Explanation of symbols]

 1, 21 bobbin 1a, 21a small diameter portion 1b, 21b large diameter portion 1c, 21c shoulder portion 1d, 21d seat surface 1e, 21q ball moving space (opening concave portion) 1g, 21n seat 1h energizing side portion (connector mounting portion) 2 Solenoid coil 3 Guide 4 Ball 5 Casing 6 Plunger 7 Stator 8 Spacer 9 Coil spring 10 Lid 11 Spring 12 Second stage seat (P port side seat) 12a Second stage seat surface (P port side seat) 16 Flat Spring 29 Wave Spring 30 Terminal Cover 31 Conductive Member 32 Male Connector Fitting Part (Connector) 59 Female Connector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mineyuki Naruse 20 Ishigane, Toyama City, Toyama Prefecture Fujikoshi Co., Ltd. (72) Inventor Shuichi Nakata 20 Ishigane, Toyama City, Toyama Prefecture (72) Inventor Yuki Takeuchi 20 Ishigane, Toyama City, Toyama Prefecture Fujikoshi Co., Ltd.

Claims (4)

[Claims] 1. A ball provided movably in a casing is reciprocated through a plunger movable by an electromagnetic force of a solenoid coil and a spring, and is provided between a pressure oil supply path or a pressure oil discharge path. Alternatively, in a poppet type hydraulic solenoid valve for distributing or supplying / discharging pressure oil by seating or detaching balls on / from a plurality of seat surfaces, the bobbin forming the solenoid coil has a diameter of the one seat surface and that of the plunger. A bobbin integrally molded with a resin that regulates a movement in a direction, a space in which the ball moves, including the seat surface,
It is formed by a small diameter portion having the same diameter as the inner diameter of the guide and above the inner diameter portion of the guide where the sliding surface of the plunger is formed, a large diameter portion having an inner diameter larger than the small diameter portion, and a large diameter portion and a small diameter portion. A stator having a shoulder portion, the plunger being slidably inserted into the small diameter portion, the upper end of the plunger being capable of contacting, and forming a part of a magnetic path; A solenoid valve characterized by being inserted into the large diameter part up to the shoulder position. 2. The solenoid valve according to claim 1, wherein the space in which the ball moves has a seat surface which is opposed to the upper and lower sides of the ball by a second-stage seat abutting the end surface of the bobbin. 3. An axial force different from the axial force that urges the stator against the shoulder of the bobbin by applying an axial force to the abutment and urges the stator to both ends of a bobbin crimped at both ends of the casing. The solenoid valve according to any one of claims 1 and 2, further comprising a wave spring or a flat spring that applies an axial force. 4. A female connector of a male / female connector for electrical connection is separable into a conducting side portion and a male connector fitting portion, and the conducting side portion is formed integrally with the bobbin and wound around the bobbin. The solenoid valve according to any one of claims 1 to 3, wherein the solenoid valve is electrically connected to the turned coil.