JP2001027340A - Control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily reduce the weight of a spool and to easily make the whole structure compact. SOLUTION: In a valve body 5, a first spool 13 including a hollow chamber 11 and a second spool 19 including a fist hollow chamber 13 and a second hollow chamber 17 are rotatably provided. A plurality of pressure ports 37, 39 selectively connectable by the rotation of the first spool 13 are provided, and a plurality of fluid supplying ports 45, 47 selectively connectable by the rotation of the second spool 19 are provided. A plurality of actuator connecting holes 49, 51 connected selectively with a fluid flowing in port 33 by the rotation of the second spool 19 are provided. When a fluid flowing out port 31 of the first hollow chamber 15 and one or the other of the fluid supplying ports 45, 47 are connected by the rotation of the second spool 19, the fluid flowing in port 33 of the second hollow chamber 17 and one or the other actuator connecting holes 49, 51 are connected each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control valve capable of controlling the direction of supply of a working fluid supplied from a pressure source such as a hydraulic pump to an actuator such as a hydraulic cylinder. The present invention relates to a control valve in which it is easy to reduce the weight of the spool as compared with the size of the capacity, and to easily make the overall configuration compact.

[0002]

2. Description of the Related Art Conventionally, a circuit configuration as shown in FIG. 11, for example, is adopted as a circuit configuration for selectively supplying high-pressure and low-pressure working fluid to a hydraulic cylinder 201 as an actuator. That is, the working fluid in the tank 203 is pumped through the filter 205 for high pressure and low pressure,
209, and the high and low pressure pumps 20
7 and 209 are supplied to the high-pressure oil passage 211.
And a switching operation by a high / low pressure switching valve 215 connected via a low pressure oil passage 213, and a directional control valve 217 connected to the high / low pressure switching valve 215, the first and second hydraulic chambers 219, 219, of the hydraulic cylinder 201. 22
This is a configuration in which the supply direction of the working fluid to 1 is switched and controlled. Note that reference numerals 223 and 225 in the figure are accumulators.

[0003]

As described above, there are a high-pressure circuit and a low-pressure circuit as working fluid circuits. A high-low pressure switching valve is used to switch between the high-pressure circuit and the low-pressure circuit. is necessary. A direction control valve is required to switch and control the supply direction of the working fluid to the actuator. That is, there is a problem that a plurality of control valves are required, the overall configuration is complicated, and it is difficult to reduce the size.

Further, the conventional control valve has a structure in which a groove as a circuit is formed on the outer peripheral surface of the spool, and lands are always present on both sides of the groove. When the port diameter or the spool diameter is increased, the spool becomes heavier and larger, which makes it difficult to perform a quick and light switching operation of the spool, and increases the overall configuration for the capacity.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. According to the first aspect of the present invention, a first spool having a hollow chamber in a valve body is rotatably provided. A second spool provided with a first hollow chamber and a second hollow chamber is provided rotatably, and is selectively connectable to an inflow port provided in the first spool by the rotation of the first spool. A plurality of pressure ports are provided in the valve body, and an outflow hole which is always connected to an outlet provided in the first spool regardless of the rotation of the first spool is provided in the valve body; A fluid inlet that is always connected to the fluid inlet connected to the outlet regardless of the rotation of the second spool is provided in communication with the first hollow chamber of the second spool;
A plurality of fluid supply holes selectively connected to a fluid outlet provided in the second spool in communication with the first hollow chamber by the rotation of the second spool; A discharge port that is always connected to the drain port regardless of the rotation of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool is rotated to communicate with the second hollow chamber. A plurality of actuator connection holes selectively connectable to a fluid inlet provided in the second spool are provided in the valve main body, and a fluid outlet connected to the first hollow chamber by rotation of the second spool and one of the fluids are provided. When the fluid inlet port connected to the second hollow chamber is connected to one actuator connection hole when the supply hole is connected, and the fluid outlet port connected to the first hollow chamber is connected to the other fluid supply hole. At the second cavity In which the inlet and the other actuator connection hole is configured so as to connect.

According to a second aspect of the present invention, there is provided the valve body,
A first spool having a hollow chamber is slidably provided, and a second spool provided with a first hollow chamber and a second hollow chamber is provided slidably, and the first spool is slid by sliding the first spool. A plurality of pressure ports selectively connectable to an inflow port provided in one spool are provided in the valve body,
An outflow hole which is always connected to an outflow port provided in the first spool regardless of sliding of the spool is provided in the valve body, and a fluid inflow hole connected to the outflow hole regardless of sliding of the second spool. Connect the fluid inlet that is always connected to the second
A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by sliding of the second spool; A hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of sliding of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool slides. By actuation, a plurality of actuator connection holes selectively communicateable with a fluid inlet provided in the second spool in communication with the second hollow chamber are provided in the valve body,
When the fluid outlet connected to the first hollow chamber and one fluid supply hole are connected by the sliding of the second spool, the fluid inlet connected to the second hollow chamber is connected to one actuator connection hole. When the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole, the fluid inlet connected to the second hollow chamber is connected to the other actuator connection hole.

[0007] The invention according to claim 3 is that the valve body has
A first spool having a hollow chamber is rotatably provided, and a second spool which divides the first hollow chamber and the second hollow chamber is slidably provided. The first spool is rotated by rotation of the first spool. A plurality of pressure ports selectively connectable to an inflow port provided in one spool are provided in the valve body,
An outflow hole which is always connected to an outflow port provided in the first spool regardless of the rotation of the spool is provided in the valve body, and a fluid inflow hole connected to the outflow hole regardless of sliding of the second spool. Connect the fluid inlet that is always connected to the second
A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by sliding of the second spool; A hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of sliding of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool slides. By actuation, a plurality of actuator connection holes selectively communicateable with a fluid inlet provided in the second spool in communication with the second hollow chamber are provided in the valve body,
When the fluid outlet connected to the first hollow chamber and one fluid supply hole are connected by the sliding of the second spool, the fluid inlet connected to the second hollow chamber is connected to one actuator connection hole. When the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole, the fluid inlet connected to the second hollow chamber is connected to the other actuator connection hole.

[0008] The invention according to claim 4 is that the valve body has:
A first spool provided with a hollow chamber is slidably provided, and a second spool provided with a first hollow chamber and a second hollow chamber is provided rotatably. The first spool is slid by sliding the first spool. A plurality of pressure ports selectively connectable to an inflow port provided in one spool are provided in the valve body,
An outflow hole which is always connected to an outflow port provided in the first spool regardless of sliding of the spool is provided in the valve body, and a fluid inflow hole connected to the outflow hole regardless of rotation of the second spool. Connect the fluid inlet that is always connected to the second
A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by rotation of the second spool. A hole is provided in the valve body, and a discharge port that is always connected to the drain port regardless of the rotation of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool is rotated. By actuation, a plurality of actuator connection holes selectively communicateable with a fluid inlet provided in the second spool in communication with the second hollow chamber are provided in the valve body,
When the fluid outlet connected to the first hollow chamber and one fluid supply hole are connected by the rotation of the second spool, the fluid inlet connected to the second hollow chamber is connected to one actuator connection hole. When the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole, the fluid inlet connected to the second hollow chamber is connected to the other actuator connection hole.

[0009] The invention according to claim 5 is that the valve body has
A spool having a first hollow chamber and a second hollow chamber is provided so as to be rotatable, and a fluid inlet that is always connected to the fluid inflow hole regardless of the rotation of the spool is provided on the first spool of the spool. A plurality of fluid supply holes which are provided in communication with the hollow chamber and which are selectively connected to a fluid outlet provided in the spool in communication with the first hollow chamber by rotation of the spool; The discharge port which is always connected to the drain port regardless of the rotation of the spool is connected to the second port of the spool.
A plurality of actuator connection holes provided in communication with the hollow chamber, and selectively connectable to a fluid inlet provided in the spool in communication with the second hollow chamber by rotation of the spool, are provided in the valve body; When the fluid outlet connected to the first hollow chamber and one fluid supply hole are connected by the rotation of the spool, the fluid inlet connected to the second hollow chamber is connected to one actuator connection hole, When the fluid outlet connected to one hollow chamber is connected to the other fluid supply hole, the fluid inlet connected to the second hollow chamber is connected to the other actuator connection hole.

[0010] According to a sixth aspect of the present invention, in the valve body,
A spool having a first hollow chamber and a second hollow chamber is provided so as to be slidable, and a fluid inflow port always connected to a fluid inflow hole is provided on the first spool of the spool regardless of sliding of the spool. A plurality of fluid supply holes provided in communication with the hollow chamber and selectively connected to a fluid outlet provided in the spool in communication with the first hollow chamber by sliding of the spool; The discharge port which is always connected to the drain port regardless of the sliding of the spool is connected to the second port of the spool.
A plurality of actuator connection holes provided in communication with the hollow chamber and selectively connected to a fluid inlet provided in the spool in communication with the second hollow chamber by sliding the spool; When the fluid outlet connected to the first hollow chamber and one of the fluid supply holes are connected by the sliding of the spool, the fluid inlet connected to the second hollow chamber is connected to the one actuator connection hole, When the fluid outlet connected to one hollow chamber is connected to the other fluid supply hole, the fluid inlet connected to the second hollow chamber is connected to the other actuator connection hole.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
The control valve 1 according to the embodiment has a configuration in which a valve body 5 is integrally provided in a casing 3 having an appropriate shape. In the valve body 5, sleeves 7 in which divided first and second concave portions are formed concentrically from both ends are densely and integrally fitted and fixed.

A first cylindrical spool 13 having a hollow chamber 11 is rotatably fitted in a first concave portion of the sleeve 7, and a first hollow 13 is provided in the second concave portion. Room 15
A second spool 19 having a cylindrical shape and having a second hollow chamber 17 partitioned in the axial direction is rotatably fitted. The first spool 13 is connected to an appropriate rotation shaft 21S of a first control motor 21 such as a slapping motor or a servomotor mounted on the casing 3, and the second spool 19 is Is connected to a rotation shaft 23S of a similar second control motor 23 mounted on the motor.

As can be understood from the above configuration, the first spool 13 and the second spool 19 are individually rotated forward and backward by the first and second control motors 21 and 23, respectively. An inflow port 25 and an outflow port 27 communicating with the hollow chamber 11 are formed in the spool 13 so as to be axially separated from each other. Then, the second spool 19
A fluid inflow port 29 and a fluid outflow port 31 communicating with the first hollow chamber 15 are formed axially separated from each other, and a fluid inflow port 33 communicating with the second hollow chamber 17 and a drainage port. The outlet 35 is formed so as to be spaced apart in the axial direction.

The valve body 5 and the sleeve 7 are provided with first and second pressure ports 37 and 39 corresponding to the inlet 25, and an outlet hole corresponding to the outlet 27. 41 are provided.

The first and second pressure ports 37, 39
Are appropriately connected to first and second pressure sources P1 and P2 such as hydraulic pumps having different discharge pressures. When the first spool 13 is in the neutral position,
The second pressure ports 37 and 39 are shut off without being connected to the inlet 25. The first and second pressure ports 37 and 39 are connected to the flow ports located in the neutral position so that the first spool 13 is connected to the inflow port 25 as soon as the first spool 13 is rotated forward or backward from the neutral position. Entrance 25
, And arranged at a position different in phase in the rotation direction of the first spool 13.

That is, by rotating the first spool 13 forward or backward from the neutral position, the inflow port 25 is rotated.
Can be selectively connected to the first pressure port 37 or the second pressure port 39, and the pressure of the working fluid can be selected between low pressure and high pressure.

The outlet 27 is formed as a long hole that is long in the rotation direction (circumferential direction) of the first spool 13, and the outlet hole 41 is used for the flow when the first spool 13 is located at the neutral position. The outlet 2 is provided so as to correspond to the central portion in the longitudinal direction of the outlet 27, and even if the first spool 13 is rotated forward or backward from the neutral position, the outlet 2
The connection between 7 and the outflow hole 41 is always maintained.

The second recess is provided with the first hollow chamber 15.
A fluid inflow hole 43 is formed corresponding to the fluid inflow port 29, and first and second fluid supply holes 45, 47 are formed corresponding to the fluid outflow port 31. Further, the sleeve 7 is provided with first and second actuator connection holes 49 and 51 corresponding to the fluid inlet 33 of the second hollow chamber 17 and a drain port 53 corresponding to the outlet 35. It is formed. The fluid inlet 29 is formed as a long hole that is long in the rotation direction (circumferential direction) of the second spool 19, and the fluid inlet hole 43 is provided when the second spool 19 is located at the neutral position. The fluid inlet 29 and the fluid inlet 43 are always arranged even when the second spool 19 is rotated forward or backward from the center position. It is kept connected.

The outflow hole 41 and the fluid inflow hole 43
Are connected via a communication passage 55 formed on the outer peripheral surface of the sleeve 7.

When the second spool 19 is at the neutral position, the first and second fluid supply holes 45 and 47 are closed without being connected to the fluid outlet 31. Then, the first and second fluid supply holes 45 and 47 are connected to the fluid flow outlet 31 located at the neutral position so that the second spool 19 is connected to the fluid outlet 31 as soon as the second spool 19 is rotated forward or backward from the neutral position. The second spool 19 is provided near the outlet 31 at a position different in phase in the rotation direction of the second spool 19.

That is, by rotating the second spool 19 forward or backward from the neutral position, the fluid outlet 31 is rotated.
Can be selectively connected to the first and second fluid supply holes 45 and 47.

The first actuator connection hole 49 is connected to the second fluid supply hole 47 through a first connection path 57 formed in the sleeve 9, and the second actuator connection hole 51 is connected to the second actuator connection hole 51.
Is connected to the first fluid supply hole 45 via the second connection path 59.

When the second spool 19 is located at the neutral position, the first and second actuator connection holes 49 and 51 are shut off without being connected to the fluid inlet 33. The first and second actuator connection holes 49 and 5 are connected to the fluid inlet 33 as soon as the motor 19 is rotated forward or backward from the neutral position.
1 is a second position close to the fluid inlet 33 located at the neutral position.
It is provided at a position different in phase in the rotation direction of the spool 19.

That is, by rotating the second spool 19 forward or backward from the neutral position, the fluid inlet 33 is
It can be selectively connected to the first and second actuator connection holes 49, 51. Note that the first and second
The actuator connection holes 49 and 51 or the first and second fluid supply holes 45 and 47 are appropriately connected to a first chamber 61A and a second chamber 61B of an actuator 61 such as a hydraulic cylinder, for example.

The discharge port 35 is formed in a long hole that is long in the rotation direction of the second spool 19, and the drain port 53
Is disposed so as to correspond to the central portion in the longitudinal direction of the discharge port 35 when the second spool 19 is located at the neutral position, and the second spool 19 is rotated forward or backward from the neutral position. Even in this case, the drain port 53 and the discharge port 35 are always kept connected. Note that the drain port 53 is appropriately connected to the tank T.

In the above configuration, the first control motor 21 rotates the first spool 13 forward or reverse to rotate the first spool 13 or the second pressure port 39 and the inlet 2.
5, the working fluid of the first pressure source P1 or the second pressure source P2 flows into the hollow chamber 11 of the first spool 13, and flows from the outlet 27 and the outlet 41 through the communication passage 55. It reaches the fluid inflow hole 43 and flows into the first hollow chamber 15 from the fluid inflow port 29 of the second spool 19.

In this state, when the second spool 19 is rotated by the second control motor 23 and the fluid outlet 31 of the first hollow chamber 15 and the first fluid supply hole 45 are connected, The fluid inlet 33 and the first actuator connection hole 49 are connected.

Therefore, the working fluid in the first hollow chamber 15 passes through the fluid outlet 31 and the first fluid supply hole 45 (or the second connection path 59 to the second actuator connection hole 51), and thereby the first chamber of the actuator 61. 61A. The working fluid in the second chamber 61 </ b> B of the actuator 61 is supplied to the second fluid supply hole 47 and the first actuator connection hole 4.
9. The fluid flows into the second hollow chamber 17 via the fluid inlet 33,
In addition, it is discharged to the tank T via the discharge port 35 and the drain port 53.

Next, when the second spool 19 is rotated in the opposite direction by the second control motor 23 to connect the fluid outlet 31 of the first hollow chamber 15 to the second fluid supply hole 47, the second hollow The fluid inlet 33 of the chamber 17 is connected to the second actuator connection hole 51 so that the second
The working fluid is supplied to the chamber 61B, and the working fluid is discharged from the first chamber 61A.

As will be understood, the first spool 13
By rotating forward or backward, the hollow chamber 11 of the first spool 13 can be selectively connected to the first and second pressure sources P1 and P2. Therefore, the first
When the discharge pressures of the second pressure sources P1 and P2 are different, a low pressure and a high pressure of the working fluid can be easily selected.

The direction in which the working fluid is supplied to the actuator 61 can be easily switched by rotating the second spool 19 forward or backward by the second control motor 23. When the second spool 19 is rotated forward or backward by the second control motor 23, the rotation position of the second spool 19 is controlled so that the fluid outlet 31 and the first and second fluid supply holes 45 are formed. , 4
7 and the fluid inlet 33 and the first and second actuator connection holes 49 and 51, that is, the degree of opening (the degree of restriction) can be adjusted, and the supply amount of working fluid to the actuator 61 can be adjusted. That is, the flow rate can be controlled. That is, the configuration serves as both the direction control valve and the flow control valve.

As already understood, in the first embodiment, the first and second spools 13 and 19 both use the hollow chamber formed therein as a flow path for switching the flow path of the working fluid. By forming the hollow chamber, the first and second spools 13 and 19 can be formed in a cylindrical shape.

Therefore, for example, even when the overall configuration is increased to increase the capacity, the thickness of the first and second spools 13 and 19 may be maintained at the required thickness. , The second spools 13 and 19 can be reduced in weight. Therefore, the switching operation of the first and second spools 13 and 19 can be performed quickly and lightly, and the first and second control motors 21 and 23 can be prevented from increasing in size. Thus, the overall configuration can be made compact.

FIG. 5 shows a second embodiment.
In the second embodiment, the first connection path 57 and the second connection path 59 are omitted, and the first and second fluid supply holes 4 are omitted.
5, 47 and the first and second actuator connection holes 49,
51 are both connected to the actuator 61 via the connection paths L1 and L2, and the other configuration is almost the same as that of the first embodiment and has the same operation and effect. Components having the same function are denoted by the same reference numerals, and redundant description is omitted.

FIG. 6 shows a third embodiment. In the third embodiment, the first and second control motors 21 and 23 are respectively linear actuators such as linear motors, and the first and second spools 13 and 19 are slid in the axial direction. It is a configuration provided freely.
That is, by sliding the first and second spools 13 and 19 in the axial direction, the same operation and effect as in the above-described first embodiment can be obtained.

That is, in the first embodiment, the operation direction of the first and second spools 13 and 19 is a rotating direction, whereas in the third embodiment, the first and second spools 13 and 19 are in the rotation direction. Since the operation directions of the spools 13 and 19 are axial, the operation directions are different.
Therefore, due to the difference in the operating direction of the first and second spools 13 and 19, the inflow port 25 provided in the first spool 13
The arrangement relationship between the first and second pressure ports 37 and 39 is in the operation direction, that is, the arrangement relationship in the axial direction, and the outlet 27 is formed long in the axial direction.

Also, since the second spool 19 slides in the axial direction similarly to the first spool 13, the fluid inlet 29 and the discharge port 35 are elongated in the axial direction, and the first and second The fluid supply holes 45 and 47 are disposed on both sides of the fluid outlet 31 in the axial direction, and the first and second actuator connection holes 49 and 51 are disposed on both sides of the fluid inlet 33 in the axial direction.

Therefore, in the third embodiment,
By sliding the first spool 13 in the axial direction, the inlet 25 can be selectively connected to the first and second pressure ports 37 and 39, and by sliding the second spool 19 in the axial direction, the actuator 61 can be moved. It can switch and control the direction of supply of the working fluid to be supplied to the second embodiment, and has the same operation and effects as those of the first embodiment.

Incidentally, also in the third embodiment,
The first and second connection paths 57 and 59 are omitted, and the first and second connection paths 57 and 59 are omitted.
The actuator connection holes 49 and 51 may be connected to the actuator 61 in the same manner as in the second embodiment.

As can be understood, since the first and second spools 13 and 19 can be configured to be rotatable or slidable together, as shown in FIGS. 7 and 8,
One of the first and second spools 13 and 19 can be provided rotatably and the other can be slidably provided. 7 and 8, components having the same functions as those of the above-described embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

Incidentally, in each of the above-described embodiments, for example, the first and second spools 13 and 19 are provided for switching between high pressure and low pressure. But high pressure,
If there is no need to switch the low pressure, the first spool 13
May be omitted.

That is, in the case where the second spool 19 rotates, as shown in FIG.
In the case of the type that slides in the axial direction, the configuration on the first spool 13 side may be omitted and the fluid inflow hole 43 may be connected to the pressure source P as shown in FIG. . The other configuration is the same as the configuration of the directional control valve including the second spool 19 described above.
Since the effects can be obtained, the components having the same functions are denoted by the same reference numerals, and redundant description will be omitted.

In order to make the operation of the spool smoother and quicker and to keep the axis of the recess and the axis of the spool coincident with each other, as shown by an imaginary line in FIG. It is preferable that a plurality of chambers C are formed to hold the working fluid in the minute gap between them, and that a configuration like a hydrodynamic bearing is formed, and that each chamber C is connected to a pressure source by a connection path L. is there.

[0044]

As will be understood from the above description of the embodiment, in the present invention, the spool for switching the fluid flow path is formed in a cylindrical shape having a hollow chamber. Since the configuration is used as a flow path for switching the hollow chamber, even if the spool has a large diameter in order to increase the capacity, the weight of the spool can be reduced by increasing the inner diameter of the hollow chamber. Can be done.

Therefore, the control motor for controlling the operation of the spool can be relatively small in comparison with the size of the spool, so that the overall structure can be easily made compact and the spool can be quickly and lightly moved. It is possible to provide a control valve which can be operated and has a high response to a command, and can solve the conventional problems as described above.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a configuration of a control valve according to a first embodiment of the present invention.

FIG. 2 is an explanatory sectional view taken along line II-II in FIG.

FIG. 3 is an explanatory sectional view taken along line III-III in FIG. 1;

FIG. 4 is an explanatory sectional view taken along line IV-IV in FIG. 1;

FIG. 5 is an explanatory sectional view of a control valve according to a second embodiment of the present invention.

FIG. 6 is an explanatory sectional view of a control valve according to a third embodiment of the present invention.

FIG. 7 is a sectional explanatory view of a control valve according to a fourth embodiment of the present invention.

FIG. 8 is an explanatory sectional view of a control valve according to a fifth embodiment of the present invention.

FIG. 9 is an explanatory sectional view of a control valve according to a sixth embodiment of the present invention.

FIG. 10 is a sectional explanatory view of a control valve according to a seventh embodiment of the present invention.

FIG. 11 is an explanatory diagram of a hydraulic circuit having a conventional configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control valve 5 Valve body 11 Hollow chamber 13 1st spool 15 1st hollow chamber 17 2nd hollow chamber 19 2nd spool 21 1st control motor 23 2nd control motor 25 Inflow 27 Outflow 29, 33 Fluid inflow 31 Fluid outlet 35 Outlet 37 First pressure port 39 Second pressure port 41 Outflow hole 43 Fluid inflow hole 45 First fluid supply hole 47 Second fluid supply hole 49 First actuator connection hole 51 Second actuator connection hole 53 Drain port 61 Actuator

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F16K 11/22 F15B 11/00 D (72) Inventor Kinshiro Naito 318-3 Ishida, Isehara-shi, Kanagawa (72) Inventor Hideo Hara 2420-4 Koyamacho, Machida-shi, Tokyo (72) Inventor Osamu Takahashi 2-12-17 Higashinakahara, Hiratsuka-shi, Kanagawa F-term (reference) 3H053 AA25 BA12 DA11 3H067 AA12 AA33 BB04 BB14 CC32 DD03 DD13 DD32 EA14 EA15 EC04 FF12 FF17 GG15 3H089 AA02 BB14 BB27 CC01 DA02 DA06 DB32 DB43 GG02 HH05

Claims (6)

[Claims] 1. A first spool having a hollow chamber is rotatably provided in a valve body, and a second spool having a first hollow chamber and a second hollow chamber is provided rotatably in a valve body. ,
A plurality of pressure ports selectively connectable to an inflow port provided in the first spool by the rotation of the first spool are provided in the valve body, and provided in the first spool regardless of the rotation of the first spool. The valve body is provided with an outflow hole which is always connected to the outflow port, and the fluid inflow port which is always connected to the fluid inflow hole connected to the outflow hole regardless of the rotation of the second spool. A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by rotation of the second spool. A hole is provided in the valve body, and a discharge port that is always connected to the drain port regardless of the rotation of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool is rotated. By the movement, during the second A plurality of actuator connection holes selectively connectable to a fluid inlet provided in a second spool in communication with the chamber are provided in the valve body, and the fluid flow communicated with the first hollow chamber by the rotation of the second spool. When the outlet is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow chamber is connected to the one actuator connection hole, and the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole. A fluid connection port connected to the second hollow chamber and the other actuator connection hole are connected when the connection is established. 2. A first spool having a hollow chamber is slidably provided in a valve body, and a second spool having a first hollow chamber and a second hollow chamber is provided slidably. ,
A plurality of pressure ports selectively connectable to an inflow port provided in the first spool by sliding the first spool are provided in the valve body, and provided in the first spool regardless of the sliding of the first spool. The valve body is provided with an outflow hole that is always connected to the fluid outlet, and the fluid inflow port that is always connected to the fluid inflow hole connected to the outflow hole regardless of sliding of the second spool. A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by sliding of the second spool; A hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of sliding of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool slides. By the movement, during the second A plurality of actuator connection holes selectively connectable to a fluid inlet provided in the second spool in communication with the chamber are provided in the valve body, and the fluid flow communicated with the first hollow chamber by sliding the second spool. When the outlet is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow chamber is connected to the one actuator connection hole, and the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole. A fluid connection port connected to the second hollow chamber and the other actuator connection hole are connected when the connection is established. 3. A first spool having a hollow chamber is rotatably provided in a valve body, and a second spool having a first hollow chamber and a second hollow chamber is provided slidably. ,
A plurality of pressure ports selectively connectable to an inflow port provided in the first spool by the rotation of the first spool are provided in the valve body, and provided in the first spool regardless of the rotation of the first spool. The valve body is provided with an outflow hole that is always connected to the fluid outlet, and the fluid inflow port that is always connected to the fluid inflow hole connected to the outflow hole regardless of sliding of the second spool. A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by sliding of the second spool; A hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of sliding of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool slides. By the movement, during the second A plurality of actuator connection holes selectively connectable to a fluid inlet provided in the second spool in communication with the chamber are provided in the valve body, and the fluid flow communicated with the first hollow chamber by sliding the second spool. When the outlet is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow chamber is connected to the one actuator connection hole, and the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole. A fluid connection port connected to the second hollow chamber and the other actuator connection hole are connected when the connection is established. 4. A first spool having a hollow chamber is slidably provided in a valve body, and a second spool having a first hollow chamber and a second hollow chamber is rotatably provided in the valve body. ,
A plurality of pressure ports selectively connectable to an inflow port provided in the first spool by sliding the first spool are provided in the valve body, and provided in the first spool regardless of the sliding of the first spool. The valve body is provided with an outflow hole which is always connected to the outflow port, and the fluid inflow port which is always connected to the fluid inflow hole connected to the outflow hole regardless of the rotation of the second spool. A plurality of fluid supplies provided in communication with a first hollow chamber of a spool and selectively connected to a fluid outlet provided in a second spool in communication with the first hollow chamber by rotation of the second spool. A hole is provided in the valve body, and a discharge port that is always connected to the drain port regardless of the rotation of the second spool is provided in communication with the second hollow chamber of the second spool, and the second spool is rotated. By the movement, during the second A plurality of actuator connection holes selectively connectable to a fluid inlet provided in a second spool in communication with the chamber are provided in the valve body, and the fluid flow communicated with the first hollow chamber by the rotation of the second spool. When the outlet is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow chamber is connected to the one actuator connection hole, and the fluid outlet connected to the first hollow chamber is connected to the other fluid supply hole. A fluid connection port connected to the second hollow chamber and the other actuator connection hole are connected when the connection is established. 5. A spool having a first hollow chamber and a second hollow chamber defined therein is rotatably provided in a valve body, and is always connected to a fluid inflow hole regardless of rotation of the spool. A plurality of fluid inlets are provided in communication with the first hollow chamber of the spool, and a plurality of fluid outlets selectively connectable to a fluid outlet provided in the spool in communication with the first hollow chamber by rotation of the spool. A fluid supply hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of rotation of the spool is provided in communication with the second hollow chamber of the spool,
By rotating the spool, a plurality of actuator connection holes that are selectively connected to a fluid inlet provided in the spool in communication with the second hollow chamber are provided in the valve body. When the fluid outlet connected to the hollow chamber is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow is connected to the one actuator connecting hole, and the fluid flow is connected to the first hollow. A control valve, wherein when the outlet and the other fluid supply hole are connected, a fluid inflow port communicating with the second hollow chamber is connected to the other actuator connection hole. 6. A spool provided with a first hollow chamber and a second hollow chamber in a slidable manner in a valve body, and is always connected to a fluid inflow hole regardless of sliding of the spool. A plurality of fluid inlets are provided in communication with the first hollow chamber of the spool, and a plurality of fluid outlets selectively connectable to the fluid outlet provided in the spool in communication with the first hollow chamber by sliding the spool. A fluid supply hole is provided in the valve body, and a discharge port that is always connected to a drain port regardless of sliding of the spool is provided in communication with the second hollow chamber of the spool,
By sliding the spool, a plurality of actuator connection holes which are selectively connected to a fluid inlet provided in the spool in communication with the second hollow chamber are provided in the valve body. When the fluid outlet connected to the hollow chamber is connected to one of the fluid supply holes, the fluid inlet connected to the second hollow is connected to the one actuator connecting hole, and the fluid flow is connected to the first hollow. A control valve, wherein when the outlet and the other fluid supply hole are connected, a fluid inflow port communicating with the second hollow chamber is connected to the other actuator connection hole.