JPH02129479A - Pressure regulating valve - Google Patents

Abstract

PURPOSE:To guide a spring with an end of a spool valve and a receiver plug and thereby secure a stable action by setting up this drum-form spring in space between the end of the spool valve sliding in a valve sleeve and the receiver plug. CONSTITUTION:Load by an electromagnet part 103, energizing force by a spring 106 and output pressure feedback load all are made to act on a spool valve 5 sliding in a valve sleeve 104 with those of supply port 121, output port 122 and exhaust port 123, and output pressure is regulated by the balance. This spring 106 is formed into a drum form and set up in space between an end of the spool valve 5 and a receiver plug 143. Thus, the specified spring force is secured without enlarging an outer diameter of the spool valve, and at both ends of the spring, it is guidable with the end of the spool valve and the receiver plug in an inner diameter of the spring, so that a stable action can be secured as a result.

Description

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

(Prior art) Conventionally, typical electromagnetic pressure steel 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 steel valve.

Such a conventional spool-type electromagnetic pressure steel valve applies an electromagnetic load, a spring load, and an output pressure feedback load to a spool valve that slides within a valve sleeve having a supply port, an output port, and a discharge port. By balancing these loads, the supply pressure is adjusted to an output pressure corresponding to the electric signal input to the electromagnet section and outputted (see Japanese Utility Model Application Publication No. 60-52509).

Conventionally, a spring that receives a load from the electromagnet side of such a spool-type electromagnetic pressure steel valve has been used, for example, in a spool valve that is slidably disposed within a valve sleeve 201, as shown in FIG. A wide washer 203 is placed on one end of the spool valve 202, and a cylindrical spring 205 with a diameter larger than the outer diameter of the spool valve 202 is placed on top of it.
The other end of 2 is a socket 204 for adjusting the spring 205.
It was configured so that it would be received at

(Problems to be Solved by the Invention) However, when a normal transmission is mounted on a vehicle, it needs to be installed in as limited a space as possible, and it goes without saying that it needs to be made smaller and more compact. Considering the arrangement of the spring 205 described above under such conditions, (1) it is necessary to increase the outer diameter of the spool valve 202 in order to eliminate the washer and reduce the number of parts, making it smaller and more compact. It is not possible to achieve this goal.

(2) If the outer diameter of the spool valve 202 is made smaller, a one-shaft seat is required, making it impossible to reduce the number of parts.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure steel regulating valve that can eliminate the above-mentioned problems, can be made smaller and more compact, and can be accurately controlled.

(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 a pressure steel valve configured to adjust and output an output pressure corresponding to an input electrical signal to the spool valve (105), a drum-shaped spring ( 106) are arranged.

(Operation and Effect of the Invention) According to the present invention, as described above, the spool valve (10
A large drum-shaped spring (
106), so the spool valve (10
5) A spring having a predetermined spring force can be provided without increasing the outer diameter of the spring. In addition, at both ends of the spring (106), the spring (106) can be guided by the end of the spool valve (105) and the socket (143) at the inner diameter of the spring, so that it can act stably. .

In the above description, for convenience of explanation, each element is given a reference numeral with reference to FIG. 1 and FIG. 2, 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 steel valve according to the present invention, and FIG. 2 is a perspective view of a spring of the pressure steel valve.

In FIG. 1, the pressure steel regulating valve 100 includes a pressure regulating valve section 102.
and an electromagnet section 103. The pressure regulating valve section 102 has a valve knob 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 lO5, 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 land portions 131 and 132 having the same diameter is such that the output port 122 can communicate alternately 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.

By the way, in the hole 145 of the valve sleeve 104, there is a female screw member 1 for applying a load to the spring 106.
51 is formed, and a receiving plug 143 having a male screw threadedly engaged with the female screw member 151 is provided. Then, by rotating the receiving plug 143 and entering the hole 145, the spring 106 is inserted into the spool valve 10.
5 can be pressed against the end face of the receiving plug 14.
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 162. This annular step 165 is formed to shorten the pressure steel valve 100 after assembly. In other words, the pressure steel valve 100 needs to be as short as possible due to the restrictions imposed by its installation location, so 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.

In this way, the pressure regulating valve section 102! After the magnet portion 103 is coupled, the receptacle 143 is rotated and moved within the female screw member 151, and the amount of compression of the spring 106 is adjusted. This adjustment is performed by applying t to the electromagnet section 103.
This is done while supplying the flow and monitoring the output pressure of the output port 122. When this adjustment is completed, the mating bin 1
44 into the locking hole 143a formed in the receiving plug 143, and by fitting the upper end of the fitting pin 144 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 its 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. Further, the outer peripheral portion 184b is the same (separated by a minute interval from the case 155).
It is designed to face the inner peripheral surface of.

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.
3, as shown in the figure, the circumferential portion of the end face of the core 18 is deformed at three places by caulking, and the sleeve 18
A stopper 187 is formed to prevent removal of the number 5.

Furthermore, the linear 9 rolling bearing 186 accommodated in the sleeve 185 includes a stopper 141 made of a disc spring provided at the left end of the push rod 13B, 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 bearing 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 the end face of the coil assembly 182° and the core 181.
195 is a connector fixed to the outside of the case 155, and 196 is an oil hole formed through the plunger 184, which prevents hydraulic vibration at high temperatures. This is to reduce the resistance of the oil filled as a countermeasure. 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. On the other hand, 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, the push rod 138 of the movable section is inserted. One end side is inserted from the other end of the case 155 constituting the stationary part and housed in the linear 9 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 electromagnetic right portion 10.
3 into the case 155 on one end side of the case 155.
By caulking the end portion 156 of the valve sleeve 104 to the outer periphery of the flange portion 153, the pressure steel regulator valve 100 is assembled.
The assembly is completed.

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 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, which is 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-At) 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 (A
I At )P+Fs. , 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 Fsr pressed by the spring 106 are balanced.

In this way, the sliding of the spool valve 105! The lands 131 and 132 move due to the Jff displacement, and the supply port 121 and discharge port 123 of the valve sleeve 104 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 electromagnet part 1
In response to the electromagnetic signal input to 03, P-CF□-F
3°t)/(AtAx).

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

As shown in FIG. 1, a drum-shaped spring 106 is disposed between the end of the spool valve 105 disposed within the valve sleeve 104 and the stopcock 143.

With this configuration, even if the spool valve 105 has a small outer diameter, it can be strongly and reliably engaged with the end of the drum-shaped spring 106, and there is no need for a washer as in the conventional case. do not have.

In that case, as shown in FIG. 2, the diameters of the ends 106a and 106b of the drum-shaped spring 106 are smaller than the diameter of the center thereof, so that the spool is attached inside the outer diameter of the center of the spring 106. Valve 105 and plug 14
It will be guided by the guide part 3 and will be stably supported.

Since this drum-shaped spring 106 has a shape without directionality, that is, a symmetrical shape, it is possible to take a large specified load, and also eliminates reverse assembly.
Assembly can be facilitated.

Further, as shown in FIGS. 3 and 4, the radius R of the guide portion of the spool valve 105 (the same applies to the spigot 143) of this spring 106 is set to be smaller than the wire diameter of the spring 106 shown in d. . With this configuration, the engagement point of the spring 106 with the guide portion does not fluctuate.

For example, as shown in FIG.
06, the end 1 of the spring 106
06a rests on the R portion, and the engagement point changes. In order to set the guide portion R to be small as described above, it is configured to avoid difficulty in accurately controlling the pressure due to such fluctuations in the engagement point of the spring 106.

Further, the tip of the guide portion of the spool valve 132 is chamfered 13.
2a, the spring 106 can be easily attached. In particular, in the case of the drum-shaped spring 106, its tip portions 106a and 106b are narrowed, which is effective for smooth installation.

FIG. 5 is a sectional view of a pressure steel valve showing a second embodiment of the present invention.

In this figure, 1 is a pressure steel valve, 2 is a pressure regulating valve part, 3 is an electromagnet part, 4 is a valve sleeve, 5 is a Subur valve, 6 is a drum-shaped spring, 7 is a large diameter hole, and 8 is a Small diameter guide hole, 9
21 is a medium diameter guide hole, 21 is a supply port, 21a, 23a are annular notches, 22 is an output port, 23 is a discharge port, 3
1. Reference numeral 32 indicates two land portions having the same outer diameter, 33 indicates 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, and 34 indicates a land portion having the same diameter. The space between the land portions 31 and 32, 34a is an annular notch, 35 is a sealed space formed by the small diameter land portion 33 and the guide holes 8 and 9, 35a is an annular notch, 36 is a feedback oil passage, and 37 is a small diameter land. A rod-shaped portion stands up from the center of the end surface of the portion 32, 38 is a push rod, 39 is a guide member for the spring 6, 51 is a female screw member, 52 is a receiving plug, 53, 54 is a flange portion, 55 is a case, 56 is the end, 57 is the step,
61 is a thick part, 62 is a thin part, 63 is a tapered part, 64 is a peripheral part, 65 is an annular step, 66 is a notch, 71 is a protruding part, and 72 is used to fix the stopper in the final alignment position. This is the caulking part.

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 TH and magnet section 3 will be explained.

In FIG. 5, a thick cylindrical core 81 made of a magnetic material is housed in a 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 adjustment means, the structure of the push rod 38, and the stopper structure of the push rod 38.

In particular, the spool valve 5 moves until the position where the combined force of the feedback hydraulic pressure and the force Fsp pressed by the spring 6 balances with the force FSQL generated by the electromagnet 3.
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 is expressed as
).

Other points are similar to those of the first embodiment.

In this embodiment, a pressure control valve 1 having such a configuration is used.
A drum-shaped spring 10 similar to that shown in the first embodiment
is installed. In other words, the end of the spool valve 5 and the stopcock 52
A drum-shaped spring 10 is installed between the two.

Therefore, the same effects as those 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 cross-sectional view of a pressure steel valve according to the present invention, FIG. 2 is a perspective view of a spring of the pressure steel valve, and FIGS. 3 and 4 are cross-sectional views showing a state in which the spring is secured. FIG. 5 is a sectional view of a pressure steel valve according to a second embodiment of the present invention, and FIG. 6 is a partial configuration diagram of a conventional pressure steel valve. 1.100... Pressure steel regulating valve, 2,102... Pressure regulating valve part, 3.103... Electromagnet part, 4.104... Valve sleeve, 5°105... Spool valve, 6. 106...
- Drum-shaped spring, 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, 55.
155...Case, 81.181...Core, 82.
182... Coil assembly, 84, 184... Plunger, 86. , 186...Linear 9 rolling bearing. Patent applicant: Aisin AW Co., Ltd. Agent: Patent attorney: Mamoru Shimizu (1 other person) Figure 2 Figure 3 Figure 4

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 steel regulating valve configured to adjust the supply pressure to an output pressure corresponding to the input electric signal to the electromagnet part and output it,
A pressure regulating valve in which a drum-shaped spring is disposed between the end of the spool valve and the stopper. (2) The pressure regulating valve according to claim 1, wherein the spring has a shape without directionality. (3) The pressure regulating valve according to claim 1 or 2, wherein the radius of the guide portion of the spool valve and the spigot of the spring is set smaller than the wire diameter of the spring. (4) The pressure regulating valve according to claim 1, 2 or 3, wherein the tip of the guide portion of the spool valve is chamfered.