JPH02129480A - Pressure regulating valve - Google Patents

Abstract

PURPOSE:To make a nonwoven fabric ring function as a filter by interposing this nonwoven fabric ring between a flange part of a core in an electromagnet part and one end of a coil assembly, and pressing this coil assembly to a case inner surface stepwise. CONSTITUTION:When a pressure regulating valve is assembled, a nonwoven fabric ring 94 is interposed between a flange part 54 of a core 81 constituting an electromagnet part and one end of a coil assembly 82, while a flange part 53 of a valve sleeve 4 with those of supply port, output port and exhaust port 203 is assembled so as to cause the other end of the coil assembly 82 to be pressed to a step difference 201 formed in the inner circumference of a case 55. Accordingly, oil penetrating into an oil chamber 207 by movement of a plunger 84 via a through oil hole 203, a ring oil passage 206 is removed of its foreign substances by the nonwoven fabric ring 94. Thus, any load motion between the coil assembly and the core is prevented from occurring and, what is more, a separate filter setup can be dispersed with.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pressure regulating valve, and more particularly to an electromagnetic pressure regulating valve that controls fluid pressure in response to an electrical signal.

(Prior Art) Conventionally, typical electromagnetic pressure regulating valves include a diaphragm type that receives feedback pressure on a diaphragm surface and a spool type that receives feedback pressure on a spool end surface. The latter spool type 1 relates to a magnetic pressure regulating valve.

Such conventional spool-type electromagnetic pressure regulating valves generally apply an electromagnetic load, a spring load, and an output pressure feedback load to a spool valve that slides within a valve sleeve that has a supply port, an output port, and a discharge port. By balancing these loads, the supply pressure is adjusted to an output pressure that corresponds to the input electric signal to the electromagnet section.
(See Publication No. 9).

Here, when the pressure regulating valve is incorporated into a hydraulic control circuit for an automatic transmission of an automobile, hydraulic oil from an oil tank is supplied to the pressure regulating valve section to operate the pressure regulating valve. The electromagnet part of the pressure regulating valve is often filled with hydraulic oil in order to prevent hydraulic vibration at high temperatures. Hydraulic oil is sent to the pump.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional pressure regulating valve, when the hydraulic oil in the oil tank is supplied into the electromagnet part, foreign substances such as iron powder generated in other valves etc. are mixed with the hydraulic oil. 74Gm may enter the stone area. The foreign matter adheres to the plunger as an electric signal is supplied to the electromagnet and the plunger becomes magnetic, but over time this foreign matter accumulates and may cause the plunger to stick or
The magnetic circuit could be shorted. Furthermore, if the foreign matter enters between the pusher for fixing the plunger and the linear 9 rolling bearing, the linear 9 rolling bearing may be locked due to the foreign matter being caught.

For this reason, an O-ring or the like is provided between the coil assembly and the case to prevent the foreign matter from entering the electromagnet portion.

However, when disposing the above-mentioned O-ring etc. between the coil assembly and the case, a space is required to accommodate the O-ring etc., and a recess is formed as appropriate at the corresponding location of the coil assembly and the case, and a seal is added. It was necessary to perform finishing processing to improve the properties.

The present invention solves the problems of the conventional pressure regulating valve, and
The simple structure reduces the number of foreign objects! It is an object of the present invention to provide a pressure regulating valve that prevents the pressure from entering the magnet part and also improves the ease of assembling a coil assembly.

Means for Solving the Problems To that end, the present invention provides a spool valve (5) sliding within a valve sleeve (4) having a supply port (21), an output port (22) and a discharge port (23). By applying the load from the electromagnet, the spring load, and the output pressure feedback load to balance these loads, the supply pressure is adjusted to the output pressure corresponding to the input electric signal to the electromagnet part (3). Pressure regulating valve configured to output (
In 1), the electromagnet part (3) has a nonwoven fabric ring (94) interposed between the flange part (54) of the core (81) and one end of the coil assembly (82), and the case (55). The structure is such that the other end of the coil assembly (82) is pressed by a step (201) formed on the inner periphery.

(Operation and Effects of the Invention) According to the present invention, as described above, a ring (94) made of a nonwoven fabric is interposed between the flange portion (54) of the core (81) and one end of the coil assembly (82). Along with the case (
55) Since the structure is such that the step (201) formed on the inner circumference presses the other end of the coil assembly (82), when the pressure regulating valve (1) is assembled, the step (201) is pressed against the coil assembly. As a result of pressing the end of the core (82), the nonwoven fabric ring (94) is pressed against the flange (82) of the core (81).
54) and one end of the coil assembly (82).

Therefore, it is possible to prevent rattling between the coil assembly (82) and the core (81), and the non-woven fabric ring (94) acts as a filter to remove fluid in the hydraulic oil. There is no need to provide a separate filter to remove foreign matter.

In addition, in the above description, for convenience of explanation, the first
Although the reference numerals used in the figures and FIG. 2 are given, these do not limit the structure of the present invention.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a pressure regulating valve showing a first embodiment of the present invention.

In the figure, a pressure regulating valve 1 includes a pressure regulating valve section 2 and an electromagnet section 3.
It is composed of. The pressure regulating valve section 2 is composed of a valve sleeve 4 and a spool valve 5, and the valve sleeve 4 has a large diameter hole 7 for accommodating a spring 6 in its internal axial direction, and a large diameter hole 7 which will be described later. Spool valve 5
A small-diameter guide hole 8 and a medium-diameter guide hole 9 are formed through the guide hole 8 for slidingly guiding the .

On the outer periphery of the valve sleeve 4 corresponding to the guide hole 9, a supply port 21, a discharge port 23, and an output port 22 that are open in the radial direction are formed in order from left to right, and the fluid flow in each of these ports is facilitated. annular notches 21a, 23a as necessary.

34a and 35a are formed.

The spool valve 5 also has two lands 31 and 32 of equal outer diameter which are slidably guided in the guide hole 9 of the medium diameter, and a guide of the small diameter adjacent to one of the land parts 31. The hole 8 is provided with a small diameter land portion 33 that is slidably guided by the liquid. The distance between the opposite ends of the land portions 31 and 32 having the same diameter is such that the output port 22 can communicate with the supply port 21 and the discharge port 23 alternately at a predetermined ratio by sliding the spool valve 5. is formed. Further, the space 34 between the lands 31 and 32 having the same diameter is always connected to the output port 22.

The sealed space 35 formed by the one land portion 31, the small-diameter land portion 33, and the guide holes 8 and 9 is communicated with the space 34 between the land portions 31 and 32 through a feedback oil passage 36. ing.

The feedback oil passage 36 is formed to diagonally penetrate the land portion 31, and is connected to the output port 22.
The output pressure obtained is fed back and supplied to the sealed space 35.

The rod-shaped portion 37 erected from the center of the end surface of the equal-diameter land portion 32 is a push rod 38 of the electromagnet portion 3, which will be described later.
Also, the portion protruding from the center of the end surface of the small diameter land portion 33 is the contact portion with the guide member 3 of the spring 6.
It is 9.

By the way, a female thread member 51 for applying a load to the spring 6 is formed in the hole 7 of the valve sleeve 4, and a male thread member 52 is formed to be screwed into the female thread member 51.
is installed. Then, by rotating the male screw member 52 and inserting it into the hole 7, the spring 6
can be pressed against the end face of the spool valve 5, and by adjusting the amount of rotation of the male threaded member 52, the amount of compression of the spring 6 can be adjusted.

When assembling the pressure regulating valve section 2, first, the spool valve 5 is inserted into one end of the valve sleeve 4 in which the hole 8 is formed, with the small-diameter land section 33 facing the spool valve 5, and
The spring 6 is inserted from the side so as to surround the guide member 39 and come into contact with the end surface of the small diameter land portion 33 . Then, while holding the spring 6, the male threaded member 52 is screwed into the female threaded member 51 of the valve sleeve 4, thereby compressing the spring 6 by a predetermined amount.

The pressure regulating valve section 2 assembled in this way is then
A flange portion 5 formed at the end of the valve sleeve 4 on the hole 7 side
3 is opposed to a flange portion 54 of the electromagnet portion 3, which will be described later, and is coupled to the electromagnet portion 3 by caulking an end portion 56 of the case 55. To facilitate the crimping, a step 57 is formed on the inner surface of the case 55 at a portion facing the flange 54, and the crimping is performed with the flange 54 in contact with one part of the step 57. will be held.

Here, the flange portion 53 has a thick portion 61 and a thin portion 6.
2, and a tapered portion 63 is formed on the end surface of the thick portion 61. This tapered portion 63 is for forming a relief when the flange portion 53 is opposed to the flange portion 54 . In other words, because of the relief, the flanges 53 and 54 come into contact only at the peripheral edge 64, so that only the peripheral edge 64 needs to be surface-treated to bring them into contact, making assembly easier. Not only that, but the assembly is also in good condition.

Furthermore, an annular step 65 is formed at the peripheral edge of the thin portion 62 . This annular step 65 corresponds to the pressure regulating valve 1 after assembly.
It is formed to shorten the length.

In other words, the pressure regulating valve 1 needs to be as short as possible due to restrictions due to its installation location, so both flange portions 53
．． It is preferable to make the flange 54 thin. However, there is a limit to how thin the flange parts 53 and 54 can be made due to strength issues, so a thick part 61 having a constant thickness is formed and the other The annular step 65 is formed in the thin portion 62 . With this configuration, this annular step 6
The tmm distance after assembly can be shortened by 5 minutes.

Note that 66 indicates the supply port 21, the discharge port 23, and the output port 2 provided in the radial direction of the outer circumference of the valve sleeve 4.
This is a notch for positioning between 2 and a hydraulic control system (not shown) of an automatic transmission for an automobile, for example.

After the pressure regulating valve section 2 and the electromagnet section 3 are coupled in this manner, the male threaded member 52 is rotated and moved within the female threaded member 51, and the amount of compression of the spring 6 is adjusted. This adjustment is performed while supplying current to the electromagnet section 3 and monitoring the output pressure of the output port 22. When this adjustment is completed, as shown at 72 in the figure, the protrusion 71 on which the female screw member 51 is formed is caulked from the outside, and the male screw member 52 is fixed. In order to facilitate this caulking, the protruding portion 71 is formed with a thin portion.

Next, the electromagnet section 3 will be explained.

The electromagnet section 3 has a cylindrical case 55 made of a magnetic material, and a thick cylindrical core 81 also made of a magnetic material is accommodated in the case 55.

The core 81 is arranged such that the flange portion 54 formed at one end contacts and engages the flange portion 53 of the valve sleeve 4 . Further, a coil assembly 82 is clamped and fixed at the inner part of the cylindrical space formed by the case 55 and the core 81. The cylindrical case 55, core 81, and coil assembly 82 constitute a stationary portion.

On the other hand, a push rod 38 is inserted into the hollow portion 83 of the core 81, and a plunger 84, also made of a magnetic material, is fixed to the other end of the push rod 38 and is attracted by the coil assembly 82. The movable part is constituted by.

In the movable part, the plunger 84 fixedly installed on the other end side of the pushbutton 38, that is, on the side away from the pressure regulating valve part 2, has a thick disk shape, and its center on the side facing the core 81 is fixed. A cylindrical recess 84a is formed in the recess 84a in which the end of the core 81 is accommodated with a small interval when the plunger 84 is pulled. Further, the outer circumferential portion 84b faces the inner circumferential surface of the case 55 at a similarly small interval.

A linear 9 rolling bearing 86 is disposed in the hollow portion 83 of the core 81 via a sleeve 85.

After the sleeve 85 is fitted into the hollow portion 83 of the core 81, three circumferential portions of the end face of the core 81 are crimped and deformed, as shown in the figure, to form a stopper 87 to prevent the sleeve 85 from being pulled out.

Moreover, the linear 9 rolling bearing 86 accommodated in the sleeve 85 is able to freely slide within the space within the sleeve 85 while being regulated by stoppers 88 and 89. And 1 linear type rolling bearing 86
consists of a bearing cage 90 made of a brass layer, and balls 91 that are accommodated in small holes formed to penetrate inside and outside of the bearing cage 90 and that slightly protrude from the inner and outer peripheries of the linear 9 rolling bearing 86, While supporting the push rod 38 via the ball 91, the push rod 38 and the sleeve 85 can be rotated relative to each other.

Incidentally, the pusher 38 is made of a non-magnetic material such as stainless steel, and its surface is nitrided to form a nitrided layer to provide wear resistance. and,
As shown at 92 in the figure, one end of the plunger has 8
4 is fixed by ring caulking. Further, a tapered portion 93 is formed at the other end of the push rod 38 facing the rod-shaped portion 37 of the spool valve 5 to prevent incorrect assembly.

Note that 94 is a ring made of nonwoven fabric interposed between the end face of the coil assembly 82 and the flange portion 54 of the core 81;
96 is a connector fixed to the outside of the case 55, and 96 is an oil hole formed through the plunger 84 to reduce the resistance of oil filled as a countermeasure against hydraulic vibration at high temperatures. A cover member 97 closes the end of the case 55 on the plunger 84 side.

The electromagnet section 3 is connected to the ring 9 from one end side of the case 55.
4 and the core 81 with the coil assembly 82 fixed thereon,
The flange portion 54 is positioned and fixed using, for example, a step portion 57 formed on one end side of the inner surface of the case 55 to constitute a stationary portion.
After fitting and fixing by ring caulking to form a movable part, a stopper 89 is inserted and one end side of the push rod 38 of the movable part is connected to the case 55 which forms the stationary part.
is inserted from the other end of the linear 9 rolling bearing 86 via the sleeve 85.

Then, the flange portion 53 and the stopper 8 formed on the other end side of the valve sleeve 4 of the pressure regulating valve portion 2 described above are fitted into the case 55 on the one end side of the electromagnet portion 3.
The assembly of the pressure regulating valve 1 is completed by caulking the end portion 56 of the valve sleeve 4 to the outer periphery of the flange portion 53 of the valve sleeve 4.

Since the present embodiment has the above-described configuration, when pressure fluid, such as pressure oil, is supplied from a pump or the like to the supply port 21 of the valve sleeve 4, the pressure oil is supplied from the supply port 21 to the valve sleeve 4 and the spool valve. It reaches between the land parts 31 and 32 of the spool valve 5 through an opening formed between the land parts 31 and 31 of the spool valve 5, and further via the output port 22 of the valve sleeve 4, which is always in communication with the land parts 31 and 32. The oil is then supplied to each hydraulic device in a hydraulic system that requires pressure oil, such as an automatic transmission.

The pressure P of the pressure oil output at the output port 22 is simultaneously fed back via the feedback oil passage 36 to the land portion 31 and the small diameter land portion 33 adjacent thereto.
Then, it is guided into the sealed space 35 formed by the valve sleeve 4, and is applied with an area difference A+At obtained by subtracting the cross-sectional area A2 of the small-diameter land portion 33 from the cross-sectional area IA of the land portion 31.

The force (A1-At)P generated by this pressure is added to the force FtP pressed by the spring 6, and the spool valve 5
is pressed to the right in the figure by the resultant force (At - Ax) P + F sr. The spool valve 5 receives the combined force and the force F generated by the electromagnet section 3. , are slidably displaced within the valve sleeve 4 until 1 is balanced.

In this way, the lands 31, 32 move due to the sliding displacement of the spool valve 5, and the supply bow 21 of the valve sleeve 4 is moved.
and the discharge port 23 are controlled to open and close at a predetermined ratio with respect to the output port 22, and as a result, the output pressure P at the output port 22 becomes P-(F 's.L -Fsr) / (At Ax
).

Here, the inside of the solenoid valve section will be explained based on FIG.

The inside of the electromagnet section 3 is filled with hydraulic oil used in a hydraulic control system in order to prevent hydraulic vibration at high temperatures. Therefore, foreign matter such as iron powder in the oil tank may enter the electromagnet section 3 together with the hydraulic oil. ring 94 made of
is intervened. The nonwoven fabric constituting the ring 94 is
It is made of heat-resistant nylon "Nomex (trade name)" and has sufficient liquid permeability to separate and filter foreign matter when hydraulic oil passes through it.

By the way, on the inner peripheral surface of the case 55 surrounding the electromagnet part 3, there is a step 201 that comes into contact with the other end of the coil assembly 82.
is formed. The step 201 is formed to press the end of the coil assembly 82 when the pressure regulating valve section 2 and the T4 magnet section 3 are assembled by caulking the end 56 of the case 55. The ring 94 is compressed between the flange portion 54 of the core 81 and the end of the coil assembly 82.

The pressing action of the step 201 and the elasticity of the ring 94 make it possible to prevent looseness between the coil assembly 82 and the core 81.

With the above configuration, the hydraulic oil in the oil tank (not shown) tries to enter the electromagnet section 3 through the gap 202 between the connector 95 and the case 55, but the step 201
This is prevented by the pressing force in the oil passage hole 203.
Hydraulic oil entering the electromagnet portion 3 through the ring 204 and hydraulic oil entering the gap 205 between the connector 95 and the case 55 are filtered when passing through the ring 94, and enter the oil chamber via the annular oil passage 206. It reaches 207.

Next, FIG. 3 shows a sectional view of a pressure regulating valve showing another embodiment of the present invention.

In the figure, 100 is a pressure regulating valve, which is composed of a pressure regulating valve section 102 and an electromagnet section 103, as in the first embodiment. The pressure regulating valve section 102 has a valve sleeve 104.
and a spool valve 105.

In the pressure regulating valve 100, 106 is a spring;
107 is a large diameter hole that accommodates the spring 106;
8 is a small-diameter guide hole, and 109 is a medium-diameter guide hole.

Also, 121 is a supply port, 122 is an output port, 123
are discharge ports, and each port portion of the valve sleeve 104 has annular notches 121a, 123a, 134a.
, 135a are formed.

The spool valve 105 has equal diameter land portions 131 and 132.
and a valve sleeve 10 having a small diameter land portion 133.
4 to form a space 134 and a sealed space 135.

A feedback oil passage 1 is provided in the land portion 131.
36 are formed. In addition, 137 is a protrusion, 138
is a push rod, 139 is a rod-shaped portion, 141 , 187 , 1
89° is a stopper.

The spring 106 is adjusted by screwing the male threaded member 143 into the female threaded member 151.

Here, 143a is a locking hole, 144 is a fitting pin, 144
a is its lower end, and 145 is a hole.

153 and 154 are the flange parts of the valve sleeve 104 and the electromagnet part 103, respectively, and the end part 156 of the case 155.
By caulking both flanges 153°1
54 are connected. Here, 157 is a step part, 161 is a thick part, 162 is a thin part, 163 and 166 are tapered parts,
164 is a peripheral edge portion, and 165 is an annular step.

The electromagnet section 103 has a stationary section consisting of a cylindrical core 181 and a coil assembly 182, and a movable section consisting of a plunger 184 and a push rod 138. In the core 181, 183 is a hollow part of the core 181, 184a is a recessed part, 184b is an outer peripheral part, 185 is a sleeve, 186 is a linear 9 rolling bearing, 190 is a bearing cage, 1
91 is a ball accommodated in the bearing cage 190;
93 is a contact portion, 194 is a ring made of nonwoven fabric, 195 is a connector, 196 is an oil hole, and 197 is a lid member.

This embodiment is different from the first embodiment in the structure of the spool valve 105 in the pressure regulating valve section 102, the structure of the valve sleeve 104, and the structure of the joint between the pressure regulating valve section 102 and the electromagnet section 103.

That is, the valve sleeve 104 has a large-diameter hole 107 accommodating the spring 106 in its internal axial direction, followed by a small-diameter guide hole 108 and a medium-diameter guide hole 109 that slide and guide a spool valve 105, which will be described later. is formed so as to penetrate through it.

On the outer periphery of the valve sleeve 104 corresponding to the guide hole 109, a supply port 121, an output port 122, and a discharge port 123, which are opened in the radial direction, are formed in order from right to left to ensure smooth fluid flow in each of these ports. Annular cutouts 121a, 123a,
134a and 135a are formed.

The spool valve 105 also has two lands 131 with equal outer diameters that are slidably guided in the medium diameter guide hole 109.
, 132, and a small-diameter land portion 133 adjacent to one of the land portions 131 and slidably guided in the small-diameter guide hole 108. The distance between the opposite ends of the land portions 131 and 132 having the same diameter is such that the output capo H22 can alternately communicate with the supply port 121 and the discharge port 123 at a predetermined ratio by sliding the spool valve 105. formed to the dimensions.

Also, the space 13 between the lands 131 and 132 having the same diameter
4 is always communicated to output port 122.

Then, the one land portion 131 and the small diameter land portion 13
A sealed space 135 formed by the guide holes 108 and 109 is communicated with the space 134 between the lands 131 and 132 through a feedback oil passage 136. The feedback oil passage 136 is formed to diagonally penetrate the land portion 131, and feeds back the output pressure obtained from the output port 122 and supplies it to the sealed space 135.

Note that a protruding portion 137 from the center of the end surface of the small diameter land portion 133 is a contact portion with a push rod 138 of the electromagnet portion 103, which will be described later, and is also a rod-shaped portion erected from the center of the end surface of the land portion 132. 139 is the spring 10
This is a stroke limiting member for the spool valve 105 that also serves as a guide for No. 6.

Incidentally, the hole 145 of the valve sleeve 104 has a female screw member 15 for applying a load to the spring 106.
1 is formed, and a male screw member 143 that is screwed into the female screw member 151 is provided. By rotating the male threaded member 143 and inserting it into the hole 145, the spring 106 can be pressed against the end face of the spool valve 105, and the male threaded member 143 can be pressed against the end face of the spool valve 105.
By IAs the amount of rotation of spring 10
6 pressure 1ift can be adjusted.

When assembling the pressure regulating valve section 102, first, the spool valve 105 is inserted from the left side into one end of the valve sleeve 104 in which the small diameter guide hole 108 is formed, with the small diameter land section 133 facing. The spring 106 is inserted from the hole 145 side so as to surround the rod-shaped portion 139 and come into contact with the end surface of the land portion 132.

Then, while holding the spring 106, the male threaded member 143 is inserted into the female threaded member 151 of the valve sleeve 151.
By screwing into the spring 106, the spring 106 is compressed by a predetermined amount.

Furthermore, in the structure of the joint between the pressure regulating valve section 102 and the electromagnet section 103, the linear 9 rolling bearing 186 accommodated in the sleeve 185 of the electromagnet section 103 is connected to the push rod 13.
Stopper 141 consisting of a disc spring provided at the left end of 8
It is possible to freely slide in the inner space of the sleeve 185 while being regulated by a brass stopper 189 provided on the brange gear 184 side. Note that the stopper 141 is provided with a nonwoven fabric member 142 on the pressure regulating valve portion 102 side. Like the first embodiment, this nonwoven fabric member 142 is made of the same heat-resistant nylon "Nomex (trade name)" as the nonwoven fabric ring 194, and is fixed by a retaining ring weight 7. .

Since this embodiment has the above-described configuration, pressure fluid is supplied from a pump or the like to the supply port 121 of the valve sleeve 104.
For example, when pressure oil is supplied, the pressure oil is supplied to the supply port 121
From the valve sleeve 104 and the land portion 1 of the spool valve 105
31 and reaches between the land portions 131 and 132 of the spool valve 5, and furthermore, the land portion 13
The oil is supplied to each hydraulic device in a hydraulic system that requires pressure oil, such as an automatic transmission, through the output port 122 of the valve sleeve 104, which is always in communication with the valve sleeve 104 and 132.

The pressure P of the pressure oil output at the output port 122 is simultaneously returned via the feedback oil passage 136, and the airtight seal formed by the land portion 131, the small diameter land portion 133 adjacent thereto, and the valve sleeve 104 It is guided into the space 135 and applied to the area difference A + −A z obtained by subtracting the cross-sectional area A of the small-diameter land portion 133 from the cross-sectional area A of the land portion 131 .

The force (A, -At) P generated by this pressure is the force F generated by the electromagnet section 103. , and therefore the spool valve 105 receives this resultant force (At
-At)P+FS. , is pushed to the left in the figure. Then, the spool valve 105 combines this combined force with the spring 1.
The valve sleeve 104 is slid within the valve sleeve 104 to a position where the pressing force Fsr of the valve sleeve 106 is balanced.

In this way, the lands 131 and 132 move due to the sliding displacement of the spool valve 105, and the valve sleeve 104
The supply port 121 and the discharge port 123 are controlled to open and close at a predetermined ratio with respect to the output port 122, and as a result, the output pressure P at the output port 122 is lower than that of the electromagnet section 103.
P=(Fsp
Fs. L)/(At-Ax).

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a pressure regulating valve showing a first embodiment of the present invention, Fig. 2 is a vertical sectional view of a main part of an electromagnet section, and Fig. 3 is a pressure regulating valve showing another embodiment of the present invention. FIG. 1.100...Pressure regulating valve, 2,102...Pressure regulating valve section, 3.103...Electromagnet section, 4,104...Valve sleeve, 5゜105...Spool valve, 6.106・・・
・Spring, 21°] 21... Supply port, 22.
122... Output port, 23° 123... Ejection port, 31.32.131, 132... Land portion, 3
3.133... Small diameter land portion, 36.136... Feedback oil path, 38.138... Push rod, 53.
54.153154...Flange part, 55.155.
・・Case, 81.181 ・・Core, 82.182・
... Coil assembly, 84.184 ... Blunger, 8
6.186...Linear 9 rolling bearing, 94.1
94...Ring, 95.195...Connector, 20
1...Step, 203.204...Oil hole.

Claims (1)

[Claims] Supply pressure can be increased by applying a load from an electromagnet, a spring load, and an output pressure feedback load to a spool valve that slides inside a valve sleeve that has a supply port, an output port, and a discharge port, and by balancing these loads. In a pressure regulating valve configured to adjust and output an output pressure corresponding to an input electric signal to the electromagnet part, the electromagnet part has a ring made of nonwoven fabric between the flange part of the core and one end of the coil assembly. A pressure regulating valve characterized in that the other end of the coil assembly is pressed by a step formed on the inner periphery of the case.