JPH02129484A - Pressure regulating valve - Google Patents

Abstract

PURPOSE:To facilitate adjustment and operation as well as to actualize high control precision by screwing a receiver plug in an internal thread formed in the edge inner circumference of a valve sleeve, and clamping a position of this receiver plug from the outside. CONSTITUTION:An internal thread 151 is formed in the edge inner circumference of a valve sleeve 104, and a receiver plug 143 receiving a drum-form spring 106 setting the regulated pressure is screwed therein. When a position of the desired receiver plug 143 is fixed, a lower end 144a of a fitting pin 144 is engaged with an engaged hole 143a formed in the receiver plug 143, while an upper end of the fitting pin 144 is fitted in the valve sleeve 104. Accordingly, regulating operation can be facilitated and finely carried out and, what is more, output hydraulic pressure is regulatable with high accuracy.

Description

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

(Prior Art) Conventionally, typical electromagnetic pressure regulating valves include a diaphragm type that receives feedback pressure on the diaphragm surface and a spool type that receives feedback pressure on the spool end surface. The invention relates to the latter spool type electromagnetic 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 right side of the tvL stone section, and is outputted (see Japanese Utility Model Application Publication No. 60-52509).

In addition, in conventional control pressure adjustment mechanisms for throttle valves, etc., the mounting load of the spring can be adjusted and controlled by changing the number of washers inserted or changing the position where the sleeve is assembled in stages. The il pressure was adjusted to ii (for example, see Utility Model Application No. 55-89105)
.

(Issues to be Solved by the Invention However, according to the above-mentioned conventional device, the hydraulic pressure is adjusted in stages, so it is difficult to set the hydraulic pressure to the optimum value for the system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure regulating valve that eliminates the above-mentioned problems, is easy to adjust, and can adjust the mounting load of a spring with higher accuracy.

(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
A pressure regulating valve (100) configured to adjust and output an output pressure corresponding to an input electric signal to 03),
A female thread (151) provided on the inner periphery of the end of the valve sleeve (104), and a male thread (145) screwed into the female thread.
) and a fixing means for fixing the position of the socket (143) from the outside.

(Operation and Effect of the Invention) According to the present invention, as described above, the valve sleep (10
4) has a female thread (151) provided on the inner periphery of the end thereof and a male thread (145) that is screwed into the female thread.
143) and a fixing means for fixing the position of the socket (143) from the outside.
The adjustment can be made simply by rotating the spigot (143), so the operation is easy and the adjustment can be made finely. Furthermore, when fixing after adjustment is performed by caulking a protrusion provided with a screw, the receiving plug (143) can be adjusted steplessly.

With this configuration, the load pressure of the spring can be set accurately, and therefore the output oil pressure can be controlled with high precision.

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 according to the present invention, FIG. 2 is a front view of the pressure regulating valve, and FIG. 3 is an exploded perspective view of a spring adjusting portion of the pressure regulating valve.

In Figure 1, the pressure is 1! The valve regulator 100 includes a pressure regulating valve section 10
2 and an electromagnet section 103. The pressure regulating valve section 102 includes a valve sleeve 104 and a spool valve 1.
05, and the valve sleeve 104 is composed of:
A large-diameter hole 107 that accommodates a spring 106 in the 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 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
37 is a contact portion of the electromagnet portion 103, which will be described later, with a push rod 138;
This is a stroke limiting member for the spool valve 105 that also serves as a guide for the valve 06.

Incidentally, a female thread 151 for applying a load to the spring 106 is formed in the hole 145 of the valve sleeve 104, and a socket 143 having a male thread that is screwed into the female thread 151 is disposed. There is. Then, the plug 1
43 into the hole 145 while rotating, the spring 106 can be pressed against the end face of the spool valve 105, and by adjusting the amount of rotation of the transfer plug 143, the amount of compression of the spring 106 can be adjusted. be able to.

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.

The spring 106 is compressed by a predetermined amount by screwing the socket 143 into the female thread 151 of the valve sleeve 151 while holding the spring 106.

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 consists of a thick wall portion 161 and a thin wall portion 162, and tapered portions 163° 166 are formed on the end surfaces of the thick wall portion 161 and the flange portion 154.
is formed. These tapered parts 163 and 166 are
This is to form a relief when the flange portion 153 is opposed to the flange portion 154. That is, due to the relief, both the flange portions 153 and 154 are separated from the outer peripheral portion 164.
Since only the outer circumferential portion 164 needs to be surface-treated to bring the two into contact,
Not only does assembly make the work easier, it also ensures that the assembly is in good condition.

Further, an annular step 165 is formed on the outer periphery of the thin portion 162. This annular step 165 is formed to shorten the pressure regulating valve 100 after assembly. That is, since the pressure regulating valve 100 needs to be as short as possible due to the 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 part 102 and the electromagnet part 103 are connected in this way, the above-mentioned receiving plug 143 is rotated and moved within the female thread 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 the adjustment is completed, the lower end 144a of the fitting bottle 144 is inserted into the locking hole 14 formed in the receiving plug 143.
3a and by fitting the upper end of the fitting pin 144 into the valve sleeve 104, the receiving plug 143 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. In addition, the case 155 and the core 181
A coil assembly 182 is clamped and fixed at the inner part of the cylindrical space formed by the two.

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, the 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 its center on the side facing the core 181 A cylindrical recess 184a is formed in the recess 184a, 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 at the same (very small) interval.

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 stopper 187 is formed to prevent removal of the number 5.

The linear 9 rolling bearing 186 accommodated in the sleeve 185 also includes a stopper 141 made of a disc spring provided at the left end of the push rod 138 and a plunger 184.
It can freely slide in the space inside the sleeve 185 while being regulated by a brass stopper 189 provided on the side. Note that the stopper 141 has a pressure regulating valve section 10.
A nonwoven fabric member 142 is provided on the second side. This member 142 made of nonwoven fabric is fixed by a stopper 167. The linear 9 rolling bearing 186 is
It is housed in a brass bearing cage 190 and a small hole formed to penetrate inside and outside the bearing cage 190, and the linear
It consists of balls 191 that slightly protrude from the inner and outer peripheries of the rolling hair ring 186, and while supporting the push rod 138 via the balls 191, the push rod 138 and the sleeve 1
This allows for relative rotation with 85.

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. As shown at 192 in the figure, the plunger 184 is fixed to one end of the plunger 184 by ring caulking. 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 that penetrates into the plunger 184. This is an oil passage hole formed to reduce the resistance of the oil filled 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 part 103 is inserted into the core 181 with the coil assembly 182 fixed thereto from one end side of the case 155, and its flange part 154 is positioned and fixed using, for example, a stepped part 157 formed on one end side of the inner surface of the case 155. After inserting the plunger 184 into the other end of the push rod 138 and fixing it by ring caulking to form a movable section, one of the push rods 138 of the movable section is inserted. The end side is inserted from the other end of the case 155 constituting the stationary part and housed in the linear rolling bearing 186.

Then, the flange portion 153 formed on the other end side of the valve sleeve 104 of the pressure regulating valve portion 102 is attached to the electromagnet portion 10.
The case 155 is inserted into the case 155 of the one end example of 3.
The assembly of the pressure regulating valve 100 is completed by caulking the end portion 156 of the valve sleeve 104 to the outer periphery of the flange portion 153 of the valve sleeve 104.

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 5, 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 z obtained by subtracting the cross-sectional area A2 of the small-diameter land portion 133 from the cross-sectional area AI of the land portion 131.

The force (AI AI ) P generated by this pressure is the force F generated by the magnet section 103. , and therefore the spool valve 105 receives this resultant force (AI At ) P + F s. , is pushed to the left in the figure. Then, the spool valve 105 is slid within the valve sleeve 104 to a position where this resultant force and the force F'sp exerted by the spring 106 are 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 = (F3P
−Fsot )/(AI At ).

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

As shown in FIGS. 1-3, valve sleeve 104
A female thread 151 and an engagement groove 104a serving as an engagement portion are provided on the inner periphery of the end portion. A male thread 145 is formed on the outer periphery of the receiving plug 143, and an index hole 143a and a retaining groove 143b for a driver serving as a rotating jig are provided on the end surface thereof. Therefore, the female thread 151 and the male thread 145 are screwed together, and the engagement groove 143b of the driver is screwed together.
The spring force of the spring 106 is adjusted by engaging the tip of the driver to rotate the stopper 143. After completing the adjustment, use the fitting pin 144 to attach the socket 143.
This fitting pin 144, which fixes the It is configured to be inclined so that elastic force can be applied between the upper piece 144b and the lower piece 144c. Therefore, when fixing the socket 143, while sliding the engaging claw 144d of the fitting pin 144 into the retaining groove 104a, insert the tip 144e of the lower piece 144C into the corresponding index hole of the socket 143. 143a.

The state fixed in this manner is shown in FIGS. 1 and 2.

Note that the number of indexing holes 143a of the receiving plug 143 is not limited to four, and can be increased as appropriate to improve the accuracy of indexing.

With this configuration, the spring force of the spring 106 can be easily adjusted, and moreover, the adjustment can be performed accurately and with high reliability without loosening.

Further, the adjusting means for the receiving plug 143 can also be constructed as shown in FIGS. 4 to 8. That is, an engagement groove 200a is provided at the end of the valve sleeve 200, and the engagement groove 200a is provided at the end of the valve sleeve 200.
Fixing the band portion 202 of the positioning member 201 to 0a,
Tip portion 20 of finger piece 203 extending from band portion 202
4 is engaged with a notch 4203 provided on the outer periphery of the end of the receiving plug 210.

FIG. 8 is a sectional view of a pressure regulating valve showing a second embodiment of the present invention, and FIG. 9 is a front view of the pressure regulating valve.

In these figures, l 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, 8 is a small diameter guide hole, 9 is a medium diameter guide hole, 21 is a supply port, 21a , 23
a is an annular notch, 22 is an output port, 23 is a discharge port, 31 and 32 are two lands of equal outer diameter, and 33 is the small-diameter guide hole 8 adjacent to one of the lands 31.
34 is a space between equal-diameter land portions 31 and 32, 35 is a closed space formed by the small-diameter land portion 33 and the guide hole 8.9, and 36 is a feedback oil 37 is a rod-shaped portion erected from the center of the end face of the small diameter land portion 32, 38 is a push rod, 39 is a guide member for the spring 6, 51 is a female thread, 52 is a plug, 5
3.54 is a flange part, 55 is a case, 56 is an end part, 5
7 is a stepped part, 61 is a thick part, 62 is a thin part, 63 is a tapered part, 64 is an outer peripheral part, 65 is an annular step, 66 is a notch, 7
Reference numeral 1 indicates a protrusion, and reference numeral 72 indicates a caulking portion for fixing the receiving plug 52 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 thread 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. 8, 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 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 adjustment means, the structure of the push rod 38, and the stopper structure 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 Fsr pressed by the spring 6. , and will be slid within the valve sleeve 104 to a position where it balances.

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 is expressed as P-(F,.L FSF)/(AI-Ax)
controlled so that

Other points are similar to those of the first embodiment.

In this embodiment, the adjusting means for the receiving plug 52 includes:
A thin protrusion 71 is connected to the end of the valve sleeve 4 (for example, A1 die-cast), and a female screw 51 is provided on the inner periphery thereof. Therefore, after adjusting the receiving plug 52 by screwing the receiving plug 52 provided with the male thread 52a on the outer periphery to the female thread 51,
By caulking 72 to the protrusion 71, the plug 5
Fix 2. Note that, as shown in FIG. 8, since the crimped portion is spaced from the outer diameter a of the valve sleeve 4, there is no concern that the valve sleeve 4 will be deformed due to crimping.

With this configuration, the spring 6 can be finely and steplessly adjusted.

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 cross-sectional view of a pressure regulating valve showing an embodiment of the present invention, Fig. 2 is a front view of the pressure regulating valve, Fig. 3 is an exploded perspective view of the spring adjustment part of the pressure regulating valve, and Fig. 4. Figure 5 shows a modified example of the spring adjusting part of the pressure regulating valve.
The figure is an AA sectional view of the spring adjustment part of the pressure regulation valve, and FIG. 6 is a BB-B of the spring adjustment part of the pressure regulation valve.
7 is a perspective view of the positioning member of the spring adjusting part of the pressure regulating valve, FIG. 8 is a sectional view of the pressure regulating valve showing another embodiment of the present invention, and FIG. 9 is the pressure regulating valve. 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・・・
・Drum-shaped spring, 21.121... Supply port, 22.122... Output port, 23.123...
Discharge port, 31.32.131, 132...Land part, 33.133...Small diameter land part, 36.136
... Feedback oil path, 38.138 ... Push rod, 51°151 ... Female thread, 52.143 ...
Receptacle, 52a, 145-male thread, 55.155...
・Case, 71... Protrusion, 81.181... Core, 82.182... Coil assembly, 84.184...
・Plunger, 86. , 186... Sunnier type rolling bearing, 104a... Engagement groove, 143a... Index hole, 143b... Driver engagement groove, 144...
...Mating pin. Patent applicant: Aisin AW Co., Ltd. Agent: Mamoru Shimizu (one other person)

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 pressure valve comprising: a female thread provided on the inner periphery of the end of the valve sleeve; a socket in which a male thread is formed to engage with the female thread; and a fixing means for fixing the position of the valve sleeve from the outside. Regulating valve. (2) The fixing means is provided with an index hole formed in the receiving stopper and an engaging part formed in the end of the valve sleeve, and comprises a fitting pin that fits between these parts. The pressure regulating valve according to item 1. (3) The fixing means includes a notch groove formed at the rear end of the valve sleeve and an engaging portion formed at the end of the valve sleeve, and a fitting pin that fits between them. The pressure regulating valve according to claim 1, comprising: (4) The fixing means includes a thin protrusion provided with a female thread on the inner periphery connected to the end of the valve sleeve, and a socket provided with a male thread is screwed into the female thread. 2. The pressure regulating valve according to claim 1, wherein the protruding portion is caulked after adjusting the receiving plug.