JPH02129475A - Pressure regulating valve - Google Patents

Abstract

PURPOSE:To aim at simplification in structure by installing a first stopper, regulating the moving range of a sleeve being made up of caulking a core end, and also a second stopper regulating the moving range of a bearing cage. CONSTITUTION:A pressure regulating valve 100 makes a spool valve 105 slide in a valve sleeve 104 with those of supply, output and exhaust ports 121-123 with an electric signal for an electromagnet part 103, thereby regulating supply pressure. Here a core 181 and a ball 191 in the electromagnet part 103 are held by a bearing cage 190, and the moving range of a sleeve 185 being loosely fitted in space between an outer circumference of the bearing cage 190 and an inner circumference of the core 181 is regulated by a first stopper 187 made up of caulking a core end, and then the moving range of the bearing cage 190 is regulated by second stoppers 141, 189. Thus, a core form is simplified so that these stoppers are obtained with a simple structure.

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 feed bank pressure on a diaphragm surface and a spool type that receives feedback pressure on a spool end surface. The invention relates to the latter spool type 1 [pressure regulating valve].

Such a conventional spool-type electromagnetic pressure regulating valve applies 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. By balancing the loads, the supply pressure is adjusted to an output pressure corresponding to the electric signal input to the electromagnet section, and the output pressure is adjusted (see Utility Model Application No. 59-52509 and Japanese Patent Application Laid-Open No. 59-37309). (see publication).

By the way, since the shape of the stopper of the movable part of the electromagnetic part of such a spool-type electromagnetic pressure regulating valve is complicated, it is difficult to manufacture the stopper.

(Problems to be Solved by the Invention) As described above, in the above-described conventional stopper configuration, processing of the core of the electromagnetic portion is expensive, resulting in an increase in manufacturing costs. Another problem was that the processing of the core was quite complicated.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems, simplify the shape of the core of the electromagnet, and provide a pressure regulating valve equipped with a stopper formed with a simple structure.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a supply port (1
21), output port (122) and discharge port (123)
) The supply pressure is controlled by the electromagnet by applying a load from the electromagnet, a spring load, and an output pressure feedback load to the spool valve (105) that slides inside the valve sleeve (104) and balancing these loads. Part (1
In the pressure regulating valve configured to adjust and output an output pressure corresponding to an input electric signal to the electromagnet section (103), the core (181) and the ball (
A bearing cage (190) holding a core (191), and an outer periphery of the bearing cage (190) and the core (191)
a sleeve (185) loosely fitted between the inner peripheries of the core (181) and a first stopper (185) that restricts the movement range of at least one of the sleeve (185) formed by caulking the end of the core (181); 187) and the bearing cage (
a second stopper (141) regulating the movement range of the second stopper (190);
, 189).

(Operation and Effects of the Invention) According to the present invention, as described above, the bearing cage (190) holding the core (181) and the ball (191) that serve as an escape route for the electromagnet part (103); a sleeve (185) that loosely fits between the outer periphery of the bearing cage (190) and the inner periphery of the core (181);
The sleeve (181) is formed by caulking the end of the sleeve (181).
), and a second stopper (141, 189) that limits the movement range of the bearing cage (190).
Since the core (181) is provided, the shape of the core (181) can be simplified, and the stopper can be obtained with a simple configuration.

In the above description, for convenience of explanation, each element is given a reference numeral with reference to FIGS. 1 to 3, but these do not limit the configuration 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 an embodiment of the present invention, and FIG. 2 is a front view of the movable body of the pressure regulating valve.
FIG. 3 is a perspective view of the core including the stopper portion.

In FIG. 1, the pressure regulating valve 100 includes a pressure regulating valve section 102.
and an electromagnet section 103. The pressure regulating valve section 102 includes a valve sleeve 104 and a spool valve 10.
5, and the valve sleeve 104 has a large diameter hole 1 for accommodating a spring 106 in its internal axial direction.
07, and a small-diameter guide hole 108 and a medium-diameter guide hole 109 for slidingly guiding a spool valve 105, which will be described later, are formed to pass through the guide hole 07.

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 opposing ends of the lands 131 and 132 having the same diameter is such that the output port 122 can alternately communicate with the supply port 121 and the discharge port 123 at a predetermined ratio by sliding the spool valve 105. is formed.

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 the protruding portion 1 from the center of the end surface of the small diameter land portion 133
Reference numeral 37 denotes a contact portion with a push rod 138 of the electromagnet portion 103, which will be described later, and a rod-shaped portion 139 erected from the center of the end surface of the land portion 132 is a contact portion of the electromagnet portion 103, which will be described later.
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 receiving plug 143 having a male screw threadedly engaged with the female screw member 151 is provided. and,
By rotating the receiving plug 143 and entering the hole 145, the spring 106 is inserted into the spool valve 105.
The receiving plug 143 can be pressed against the end face of the plug 143.
The amount of compression of the spring 106 can be adjusted by adjusting the amount of rotation.

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 receiving plug 143 is screwed into the female threaded member 151 of the valve sleeve 151, thereby compressing the spring 106 by a predetermined amount.

In the pressure regulating valve section 102 assembled in this way, the flange section 153 formed at the end of the valve sleeve 104 on the hole 145 side is then opposed to the flange section 154 of the electromagnet section 103, which will be described later, and the case 155 It is coupled to the electromagnet section 103 by caulking the end portion 156 of. Case 1 for the purpose of caulking.
55 A stepped portion 15 is provided on the inner surface of the portion facing the flange portion 154.
7 is formed, and the above caulking is performed in a state where the flange portion 154 is brought into contact with a piece of the stepped portion 157.

Here, the flange portion 153 is composed of a thick portion 161 and a thin portion 162, and tapered portions 163° and 166 are formed on the end surfaces of the thick portion 161 and the flange portion 154. The tapered portions 163 and 166 are for forming a relief when the flange portion 153 is opposed to the flange portion 154. That is, because of the relief, the flanges 153 and 154 come into contact only at the peripheral edge 164, so that only the peripheral edge 164 needs to be surface-treated to bring them into contact, making assembly easier. Not only that, but the assembly is also in good condition.

Further, an annular step 165 is formed at the peripheral edge of the thin portion 1620. This annular step 165 is formed to shorten the pressure regulating valve 100 after assembly. In other words, since the pressure regulating valve 100 needs to be as short as possible due to restrictions imposed by its installation location, both flange portions 15
It is preferable to make the flanges 153 and 154 thin. However, there is a limit to how thin the flanges 153 and 154 can be made due to strength issues. The annular step 165 is formed in one of the thin portions 162 . With this configuration, the electromagnet portion 1 after assembly is adjusted by the annular step 165.
03 can be shortened.

After the pressure regulating valve section 102 and the electromagnet section 103 are connected in this way, the above-mentioned receiving plug 143 is rotated and moved within the female screw member 151, and the amount of compression of the above-mentioned spring 106 is adjusted. This adjustment is performed while supplying current to the electromagnet section 103 and monitoring the output pressure of the output port 122. When this adjustment is completed, the mating pin 1
44 is engaged with a locking hole 143a formed in the socket 143, and the upper end of the fitting pin 144 is fitted into the valve sleeve 104.
43 is fixed.

Next, the electromagnet section 103 will be explained.

The electromagnet part 103 has a cylindrical case 155 made of magnetic material.
The case 155 houses a thick cylindrical core 181 also made of a magnetic material. The core 181 is arranged such that a flange 154 formed at one end contacts and engages the flange 153 of the valve sleeve 104 . Further, a coil assembly 182 is clamped and fixed at the inner part of the cylindrical space formed by the case 155 and the core 181.

The cylindrical case 155, core 181, and coil assembly 182 constitute a stationary portion.

On the other hand, a push rod 138 is inserted into the hollow portion 183 of the core 181, and a plunger 184, also made of magnetic material, is fixed to the other end of the push rod 138 and is attracted by the coil assembly 182. The movable part is constituted by.

In the movable part, a plunger 184 fixedly installed on the other end side of the push rod 138, that is, on the side away from the pressure regulating valve part 102, has a thick disk shape, and the plunger 184 on the side facing the core 181 has a thick disk shape. A cylindrical recess 184a is formed in the center, in which the end of the core 181 is accommodated with a minute interval when the plunger 184 is sucked. In addition, the outer peripheral part 1
84b faces the inner circumferential surface of the case 155 with a small distance therebetween.

A sleeve 18 is provided in the hollow portion 183 of the core 181.
A linear 9 rolling bearing 186 is disposed via 5. The sleeve 185 is connected to the hollow portion 18 of the core 181.
After the core 181 is inserted into the sleeve 18, three circumferential parts of the end face of the core 181 are deformed by caulking, as shown in the figure.
A first stopper 187 is formed to prevent the removal of the screw.

The linear 9 rolling bearing 186 housed in the sleeve 185 also has a second stopper 141 made of a disc spring provided at the left end of the pushbutton 138 and a second stopper made of brass provided on the plunger 184 side. Stopper 189
It is possible to freely slide in the space inside the sleeve 185 while being regulated by.

Note that the second stopper 141 is provided with a nonwoven fabric member 142 on the pressure regulating valve portion 102 side. This member 142 made of nonwoven fabric is fixed by a stopper 167. The linear 9 rolling bearing 186 is housed in a brass bearing cage 190 and a small hole formed to penetrate inside and outside of the bearing cage 190, and slightly protrudes from the inner and outer peripheries of the linear 9 rolling bearing 186. ball 1
91, and supports the push rod 138 via the ball 191 while allowing relative rotation between the push rod 138 and the sleeve 185.

By the way, the push rod 138 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. The plunger 184 is fixed to one end of the plunger 184 by crimping, as shown at 192 in the figure. Also, the push rod 13 facing the protrusion 137 of the spool valve 105
On the other end side of 8, an abutting portion 193 having different dimensions is formed to prevent incorrect assembly.

In addition, 194 is a ring made of nonwoven fabric interposed between the end face of the coil assembly 182 and the flange portion 154 of the core 181, 195 is a connector fixed to the outside of the case 155, and 196 is a ring formed through the plunger 184. This is an oil hole that is filled with oil to reduce the resistance of the oil as a countermeasure against hydraulic vibration at high temperatures. A cover member 197 closes the end of the case 155 on the plunger 184 side.

The electromagnet section 103 includes a core 18 to which a ring 194 and a coil assembly 182 are fixed from one end side of the case 155.
1, and its flange portion 154 is attached to the case 15, for example.
A step part 157 formed on one end of the inner surface of the push rod 13B is used to position and fix it to form a stationary part, while a plunge medium 184 is fitted into the other end of the push rod 13B and fixed by ring caulking to form a movable part. After configuring the portion, a stopper 189 is inserted, and one end side of the push pJ 138 of the movable portion is inserted from the other end of the case 155 that constitutes the stationary portion, and the linear 9 is inserted through the sleeve 185. rolling bearing 1
86.

A flange portion 153 and a stopper 141 are formed on the other end side of the valve sleeve 104 of the pressure regulating valve portion 102.
is fitted into the case 155 on one end side of the electromagnet part 103, and the end part 156 of the case 155 is caulked to the outer periphery of the flange part 153 of the valve sleeve 104, thereby completing the assembly of the pressure regulating valve 100.

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 1
31 and 132 through the output port 122 of the valve sleeve 104, which is in constant communication with each other, 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 122 described above is simultaneously returned via the feedback oil passage 136 and is formed by the land portion 131, the small diameter land portion 133 adjacent thereto, and the valve sleeve 104. It is applied to the area difference A + A t obtained by subtracting the cross-sectional area A2 of the small-diameter land portion 133 from the cross-sectional area A of the land portion 131.

The force (AI*t)p generated by this pressure is the force F generated by the electromagnet section 103. 1 and therefore, the spool valve 105 receives this resultant force (At
-Ax)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 FOP 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 P''(Fsr Fs
. L ) / (AI At ).

Next, the main configuration of the present invention will be explained in detail.

As shown in FIG. 1, a push rod 138 made of non-magnetic stainless steel is arranged on the center line of the electromagnet section 103, and a bearing cage 190 is provided so that a ball 191 comes into contact with the push rod 138.

Further, a sleeve 185 is disposed around the outer periphery of the bearing cage 190, and these sleeves are loosely movable with each other. A core 181 of the electromagnet section 103 is fixed to the outer periphery of this sleeve 185.

According to the present invention, the range of movement of the sleeve 185 is determined by caulking both ends of the core 181, for example, as shown in FIGS. regulated by stopper 187, sleeve 185
can be prevented from coming off. Further, the range of movement of the bearing cage 190 is between the plunge 184 and the core 181.
A stopper member 189 is interposed between the ring-shaped second stopper made of brass, and a push rod is provided between the pressure valve section 102 and the electromagnet section 103. and a stopper member 166 as a second stopper made of a disc spring with a nonwoven fabric 142.

As configured as above, the stopper 14 has a simple configuration.
1, 187, and 189, the shape of the core is simplified, and the bearing cage 190 and sleeve 185 are
It is possible to effectively prevent the material from coming off.

FIG. 4 is a sectional view of a pressure regulating valve showing another embodiment of the present invention.

In this figure, 1 is a pressure regulating valve, 2 is a pressure regulating valve part, 3 is an electromagnet part, 4 is a valve sleeve, 5 is a spool valve, 6 is a drum-shaped spring, 7 is a large diameter hole, and 8 is a small diameter guide Hole, 9
is a medium diameter guide hole, 21 is a supply port, 21a, 23a,
34a, 35a are annular notches, 22 is an output port, 23
3 is a discharge port, 31 and 32 are two land portions having the same outer diameter, and 33 is a small-diameter land portion that is adjacent to one of the land portions 31 and is slidably guided into the small-diameter guide hole 8;
4 is a space between lands 31 and 32 of equal diameter, 35 is a sealed space formed by the small diameter land 33 and the guide hole 8.9, 36 is a feedback oil passage, and 37 is the equal diameter land 32
38 is a push rod, 39 is a guide member for the spring 6, 51 is a female screw member, 52 is a socket, 53 and 54 are flange parts, 55 is a case, and 56 is an end. 57 is a stepped portion, 61 is a thick walled portion, 62 is a thin walled portion, 63 is a tapered portion, 64 is a peripheral portion, 65 is an annular step,
66 is a notch, 71 is a protrusion, and 72 is a caulking portion for fixing the receiving plug at the final adjustment position.

After the pressure regulating valve part 2 and the electromagnet part 3 are connected in this way, the above-mentioned receiving plug 52 is rotated and moved within the female threaded member 51, and the amount of compression of the above-mentioned 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. .

Next, the electromagnet section 3 will be explained.

In FIG. 4, a thick cylindrical core 81 made of a magnetic material is housed 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.

Note that 84a is a cylindrical recess, 84b is a circumferential portion thereof, and 84a is a cylindrical recess.
5 is a sleeve, 86 is a linear 9 rolling bearing, 87
, 88 and 89 are stoppers, 90 is a brass bearing cage, 91 is a ball, 93 is a tapered portion, 94 is a nonwoven fabric ring, 95 is a connector, 96 is an oil hole, and 97 is a lid member.

Differences between this embodiment and the first embodiment can be seen in the structure of the spool valve 5, the spigot 52 and its adjusting means, the structure of the push rod 38, and the structure of the stopper 7 of the push rod 38.

In particular, the spool valve 5 has a force F generated by the electromagnet 3, which is a composite force of the feedback hydraulic pressure and the force Fsp pressed by the spring 6. , until the position balances with .
There will be a sliding displacement within the valve sleeve 104.

Therefore, in this embodiment, the output pressure P at the output port 22 corresponds to the electromagnetic signal input to the electromagnet section 3, and P=<Fs. L Fsp) / (A+ Az
).

Other points are similar to those of the first embodiment.

In this embodiment, a pressure control valve 1 having such a configuration is used.
Next, a stopper 87 is formed at the end of the core 81 by caulking, as in the first embodiment.

Further, movement of the sleeve 83 and the bearing cage 90 is restricted by a ring-shaped stopper 88 provided between the pressure regulating valve section 102 and the electromagnet section 103.

Therefore, in this embodiment as well, the same effects as shown in the first embodiment can be achieved.

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 an embodiment of the present invention, FIG. 2 is a front view of a stopper portion of a movable body of the pressure regulating valve,
FIG. 3 is a perspective view of the core including the stopper portion, and FIG. 4 is a sectional view of a pressure regulating valve showing another embodiment of the present invention. 1.100... Pressure regulating valve, 2.102... Pressure regulating valve section, 3, Hj3... Electromagnet section, 4,104... Valve sleeve, 5105... Spool valve, 6.106...・
Drum-shaped spring, 21... Supply port, 22.1
22... Output port, 23° 123... Ejection port, 31.32.131, 132... Land portion, 33
．． 133...Small diameter land portion, 36.136...Feedback oil path, 38.138...Push rod, 55.1
55...Case, 81.181...Core, 82.1
82...Coil assembly, 83, 185...Sleeve, 84.184...Plunger, 86°186...
Linear 9 rolling bearing, 87.88.141°18
7...Stopper, 90.190...Bearing cage, 142...Nonwoven fabric, 166, 189...Stopper member, 191...Ball.

Claims (4)

[Claims] (1) 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 balancing these loads,
In a pressure regulating valve configured to adjust supply pressure to an output pressure corresponding to an input electric signal to an electromagnet part and output it,
A bearing cage is formed by holding a core and balls that form a magnetic path of an electromagnet, a sleeve loosely fitted between an outer periphery of the bearing cage and an inner periphery of the core, and an end portion of the core is caulked. A pressure regulating valve comprising: a first stopper that restricts a movement range of at least one of the sleeves; and a second stopper that restricts a movement range of the bearing cage. (2) The pressure regulating valve according to claim 1, wherein both ends of the core are caulked to restrict the movement range of the sleeve. (3) The pressure regulating valve according to claim 1, wherein the second stopper includes a ring-shaped member interposed between the plunger of the electromagnet and one end of the core. (4) The pressure regulating valve according to claim 1, wherein the second stopper includes a member provided between the electromagnet section and the pressure regulating valve section.