JPH1037909A - Speed controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce piping space and to facilitate installation work by arranging the first and the second needle valves substantially orthogonally in a main body and controlling pressure fluids flowing in the opposite directions between fluid pressure inlet/outlet ports. SOLUTION: A pressure fluid introduced from the first fluid pressure inlet/ outlet port 96 is led into the second body 30 via an orthogonal passage 94 and moves forward along a communication passage 44 via a clearance between the previously set throttle part 76 and a seating part 88. In addition, the pressure fluid is led into a chamber 108 of the first body 24 and passes through a check valve 66 so as to be led out from the second fluid pressure inlet/outlet port 62 via a passage 70 of a seat ring 64. Subsequently, in regulation of a pressure of pressure fluid flowing in the opposite direction, the pressure fluid is introduced from the second fluid pressure inlet/outlet port, 62, and the pressure fluid introduced into the chamber 108 via the clearance between a throttle part 50 in a needle valve main body 48 and a seating part 68 passes while deflecting a check valve 78 so as to be led out from the first fluid pressure inlet/outlet port, 96. In this constitution, installation work can be facilitated while reduction in a size and in weight can be accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed controller for controlling a pressure of a pressure fluid introduced into a hydraulic device and a pressure of a pressure fluid derived from the hydraulic device.

[0002]

2. Description of the Related Art Conventionally, a speed controller has been used for controlling a pressure fluid flowing into and out of a hydraulic device such as a cylinder. This speed controller has two types, a type A for controlling the pressure fluid introduced into the cylinder and a type B for controlling the pressure fluid introduced from the cylinder, in accordance with the control direction of the pressure fluid flowing through the fluid passage. It is roughly divided into two. This type of speed controller has substantially the same structure. For example, the speed controller is mounted inside the speed controller body with the direction of the check valve reversed, or the direction of the first port and the second port formed on the speed controller body is changed. Are connected to the fluid pressure device in the opposite manner, whereby a speed controller composed of an A type and a B type having different control directions of the pressure fluid is configured.

[0003] Normally, a type A speed controller is connected to one pressure fluid inlet / outlet port of a cylinder,
A B-type speed controller is connected to the other pressure fluid inlet / outlet port, and a total of two speed controllers are connected to a cylinder for use.

As shown in FIG. 8, when the pressure fluid flowing into the cylinder 3 and the pressure fluid flowing out of the cylinder 3 are both controlled by using the speed controllers 1 and 2 according to the prior art, a connection is required. A method is adopted in which two speed controllers 1 and 2 of type A and type B are connected in series with a member 4 interposed therebetween. In this case, the two speed controllers 1, 2 connected in series are connected to one pressure fluid inlet / outlet port 5 and the other pressure fluid inlet / outlet port 6 of the cylinder 3, respectively, so that a total of four speed controllers 1, 2 are connected. 1, 2, and 2 are required.

FIG. 9 shows a state in which the two speed controllers 1 and 2 are connected in series with the first port 8a and the second port 8b of the speed controller body 7 having the directions opposite to each other. In the speed controller body 7, the first
Fluid passage 9 for communicating between port 8a and second port 8b
One end of a needle valve 10 for controlling the flow rate of the flowing pressure fluid faces the fluid passage 9, and the other end of the needle valve 10 is rotated in a predetermined direction to rotate the needle valve 10. Knob 11 for adjusting aperture of 10
Is fixed. Reference numerals 12a and 12b indicate check valves, respectively, and the check valves 12a and 12b
The check function is exerted by sitting on the seat portion 14 under the action of the elastic force of the spring member 13.

[0009] The operation will be briefly described with reference to FIG. 9. The pressure fluid A introduced from the first port 8 a of the speed controller 1 moves the check valve 12 a downward against the elastic force of the spring member 13. Press to separate the check valve 12a from the seating portion 14. Therefore, check valve 12a
The first port 8 of the speed controller 1
a and the second port 8b communicate with each other, and the pressure fluid A is introduced from the speed controller 1 to the speed controller 2. In the speed controller 2, the needle valve 10
The pressure fluid A controlled to a predetermined pressure is led out from the first port 8a by adjusting the throttle amount of the pressure in advance.

On the other hand, the pressure fluid B introduced from the first port 8a of the speed controller 2 presses the check valve 12b downward against the resilience of the spring member 13 and pushes the check valve 12b down to the seating portion 14. Away from Therefore, the speed controller 2 is controlled by the opening operation of the check valve 12b.
The first port 8a and the second port 8b communicate with each other,
The pressure fluid B is introduced from the speed controller 2 to the speed controller 1. The speed controller 1 adjusts the throttle amount of the needle valve 10 in advance so that the pressure fluid B controlled to a predetermined flow rate can be supplied to the first port 8.
derived from a.

Thus, the speed controllers 1, 2
Are connected in series to control both the pressure fluid A and the pressure fluid B flowing in opposite directions.

[0009]

However, in the speed controllers 1 and 2 according to the prior art, since the two speed controllers 1 and 2 are connected to the cylinder 3 in series, the speed controllers 1 and 2 are used. 2 is disadvantageous in that the piping space is doubled.

Also, two speed controllers 1, 2
Requires a work to connect them in series via the connecting member 4, and there is a disadvantage that the number of mounting steps is increased.

Furthermore, the speed controllers 1 and 2 according to the prior art have a disadvantage that the direction in which the pressure fluid is removed from the speed controllers 1 and 2 is restricted depending on the installation environment.

SUMMARY OF THE INVENTION The present invention has been made to overcome all of these various inconveniences. A speed controller for controlling both a pressure fluid flowing into and out of a hydraulic device and reducing the piping space and installing the same. It is an object of the present invention to provide a speed controller that simplifies the operation to reduce the size and weight and that does not restrict the direction in which the pressure fluid is taken out.

[0013]

To achieve the above object, the present invention provides a speed controller body having a first fluid pressure input / output port and a second fluid pressure input / output port, and a speed controller body provided in the speed controller body. A first needle valve section which faces a fluid passage connecting the first fluid pressure input / output port and the second fluid pressure input / output port and adjusts a flow rate of a pressure fluid flowing through the fluid passage; A second needle valve portion that is provided substantially orthogonal to the first needle valve portion and that adjusts the flow rate of the pressure fluid flowing through the fluid passage. Controlling the pressure fluid flowing from the first fluid pressure input / output port and discharged from the second fluid pressure input / output port;
On the other hand, the pressure fluid flowing from the second fluid pressure input / output port and discharged from the first fluid pressure input / output port is controlled under the throttling action of the second needle valve portion.

According to the present invention, the first needle valve portion and the second needle valve portion are disposed in the speed controller main body substantially orthogonally to each other, and the first fluid is throttled by the first needle valve portion. The pressure fluid flowing from the pressure input / output port and discharged from the second fluid pressure input / output port is controlled, while the first fluid pressure input / output flows from the second fluid pressure input / output port under the throttling action of the second needle valve portion. Controls the pressure fluid discharged from the port. Therefore, it is possible to control both the pressure fluids flowing in the opposite directions between the first fluid pressure input / output port and the second fluid pressure input / output port by one speed controller.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a speed controller according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 20 denotes a speed controller according to the present embodiment. The speed controller 20 has a cylindrical first body 24 having a first through-hole 22 (see FIG. 2), and an outer periphery of the first body 24 via a ring body 26, and a second through-hole. 28
A speed controller main body composed of a cylindrical second body 30 having a cylindrical shape (see FIG. 2) and an elbow-shaped pipe joint portion 34 integrally connected to the second body 30 via a connecting portion 32 is provided. Including.

The second body 30 is provided so as to be rotatable in the direction of arrow A about the axis of the first body 24 as a rotation axis, and the joint 34 connects the axis of the connecting portion 32 protruding from the second body 30. It is provided rotatably in the direction of arrow B as a rotation axis.

As shown in FIG. 2, the speed controller 20 has a first needle valve portion 36 disposed inside the first body 24 along the axial direction, and an axial line inside the second body 30. A second needle valve portion 38 disposed along the direction, and provided above the first body 24;
A first operating section 40 for setting the throttle amount of the first needle valve section 36, and a second operating section 42 provided at one end of the second body 30 for setting the throttle amount of the second needle valve section 38
And

A connecting portion between the first body 24 and the second body 30 has a first through hole 22 of the first body 24,
A communication path 44 for communicating the second body 30 with the second through hole 28 is formed, and the first body 24 and the second body 30 are connected to each other.
A pair of O-rings 46a and 46b is provided at the turning portion of the pair to maintain the airtightness of the communication path 44.

The first needle valve section 36 is connected to the first body 24.
A first needle valve main body 48 having a rod shape disposed along the axial direction therein, a first throttle portion 50 formed in a tapered shape in which one end of the first needle valve main body 48 gradually decreases in diameter,
An O-ring 52 fitted in an annular groove formed in an intermediate portion of the first needle valve body 48. At the other end of the first needle valve main body 48, a first operating portion 40 is provided. It has a first knob 56 that is displaced along the direction, and a first lock nut 58 that holds the first needle valve body 48 at a predetermined position.

On the outer peripheral surface of the first body 24, a second screw portion 6 is provided.
In the lower part of the first body 24, a seat ring 64 having a through hole functioning as a second fluid pressure input / output port 62 is inserted. A first check valve 6 having a V-shaped cross section is provided on an upper portion of the seat ring 64 through an annular recess.
6 is mounted on the inner peripheral surface of the seat ring 64 on which the first check valve 66 is mounted.
A first seating portion 68 on which the first throttle portion 50 is seated is formed. A first through hole 2 is provided at an intermediate portion of the seat ring 64.
A first cross-shaped passage 70 that connects the second fluid pressure inlet / outlet port 62 with the second fluid pressure inlet / outlet port 62 is formed.

The second needle valve section 38 includes a second body 30
A rod-shaped second needle valve main body 72 disposed along the axial direction of the main body; a support member 74 for closing the opening of the second body 30 and rotatably supporting the second needle valve main body 72; A second throttle portion 76 formed in a tapered shape in which one end of the second needle valve main body 72 gradually decreases in diameter.
A second check valve 78 attached to an annular recess formed in the second needle valve body 72 and having a V-shaped cross section, and fitted in an annular groove formed in an intermediate portion of the second needle valve body 72. O-ring 80.

A second operating portion 42 is provided at one end of the second needle valve main body 72, and the second operating portion 42
A second knob 84 for displacing the second needle valve main body 72 along the axial direction under the screwing action of the screw portion 82, a second lock nut 86 for holding the second needle valve main body 72 at a predetermined position, Having.

At a substantially central portion of the supporting member 74, a second seating portion 88 on which the second throttle portion 76 is seated is formed, and a second seating portion 88 which is close to the second seating portion 88 and communicates with the pipe joint portion 34. Two passages 90 are formed. Further, the second check valve 78 attached to one end of the support member 74 is disposed such that the flowing direction of the passing pressure fluid is opposite to that of the first check valve 66.

In this case, the first needle valve main body 48 is
By screwing into a thread groove engraved on the inner peripheral surface of the first body 24 via the screw portion 54 and rotating the first knob 56 in a predetermined direction, the first throttle portion 50 and the first seating portion are rotated. The distance between the pressure restricting member and the pressure fluid flowing through the first restricting portion 50 is set.

On the other hand, the second needle valve main body 72 is screwed into a screw groove formed on the inner peripheral surface of the support member 74 via the third screw portion 82, and rotates the second knob 84 in a predetermined direction. By doing so, the separation distance between the second throttle portion 76 and the second seating portion 88 is adjusted, and the throttle amount of the pressurized fluid flowing through the second throttle portion 76 is set.

The pipe joint 34 is, as shown in FIG.
The second body 3 includes a pipe joint body 92 that is rotatable about an axis of the connecting portion 32 protruding from the second body 30 as a rotation axis.
A third passage 94 that communicates with the second passage 90 in 0 is formed. The opening at the end of the third passage 94 is substantially the first opening.
It functions as a fluid pressure input / output port 96. The opening is provided with a so-called one-touch joint mechanism 98. The one-touch joint mechanism 98 is provided with a synthetic resin collet 102 on the outer periphery of a release bush 100 having a plurality of cutouts, and an outer periphery of the collet 102. And a seal member 106 made of an elastic material such as natural rubber or synthetic rubber.
And are each configured as an exterior.

The reference numeral 108 is used to communicate with the communication passage 44, and to the first body 24 and the first check valve 66.
Shows a chamber surrounded by.

The speed controller 20 according to the present embodiment is basically configured as described above.
Next, the operation and the effect will be described.

First, a tube (not shown) communicating with a pressure fluid supply source (not shown) is connected to the pipe joint part 34 and the second thread part 6 formed on the bottom of the first body 24 is formed.
0, a set of pressure fluid inlet / outlet ports 5,
The speed controller 20 is screwed into each of the motors 6 (see FIG. 4). By screwing the speed controller 20 into the pressure fluid inlet / outlet ports 5 and 6 respectively, the cylinder 3
And the second fluid pressure inlet / outlet port 62 of the speed controller 20 are in communication with each other.

Further, the second knob 84 is rotated in a predetermined direction to adjust the distance between the second throttle portion 76 and the second seating portion 88 of the second needle valve body 72 to a desired value.
The second needle valve main body 72 is fixed at a predetermined position via the lock nut 86. In this case, since the separation distance between the first throttle portion 50 and the first seating portion 68 of the first needle valve main body 48 does not affect the state, the first throttle portion 50 is seated on the first seating portion 68, or 1 throttle section 50 is the first seating section 6
8 may be in any state separated by a predetermined distance.

After such a preparation operation, as shown in FIGS. 5 and 6, the pressure fluid introduced from the first fluid pressure inlet / outlet port 96 under the urging action of a pressure fluid supply source (not shown) is The inside of the second body 30 is reached via the third passage 94 and the second passage 90. The pressure fluid introduced into the second body 30 flows along the communication passage 44 through a predetermined gap between the second throttle portion 76 and the second seating portion 88 under the check operation of the second check valve 78. proceed. further,
The pressurized fluid introduced into the chamber 108 of the first body 24 via the communication passage 44 causes the first check valve 6
6 is bent in the direction of the arrow, passes through the first check valve 66, advances along the first through-hole 22, and then passes through the first passage 70 of the seat ring 64 to the second fluid pressure inlet / outlet port 62.
Is derived from

Thus, the first fluid pressure input / output port 9
The pressure fluid introduced from 6 is regulated to a desired pressure, is led out from the second fluid pressure input / output port 62, and is supplied to the cylinder 3 communicating with the second fluid pressure input / output port 62.

Next, when the pressure fluid flowing in the opposite direction to the above is regulated, that is, the pressure fluid discharged from the cylinder 3 is introduced from the second fluid pressure inlet / outlet port 62 and regulated to a desired pressure. The case of deriving from the first fluid pressure input / output port 96 will be described.

In this case, the first knob 56 is rotated in a predetermined direction in advance, and the first throttle 5 of the first needle valve main body 48 is rotated.
After adjusting the distance between the first seat portion 68 and the first seating portion 68 to a desired value, the first needle valve body 48 is fixed at a predetermined position via the first lock nut 58. In this case, the distance between the second throttle portion 76 and the second seating portion 88 has no effect, so that any state may be used as described above.

As shown in FIG. 7, the pressure fluid led out of the cylinder 3 is introduced from the second fluid pressure inlet / outlet port 62, and further, the inside of the seat ring 64 is checked under the check operation of the first check valve 66. It passes through and passes through the gap between the first throttle portion 50 and the first seat portion 68 of the first needle valve body 48 to reach the chamber 108. The pressure fluid introduced into the chamber 108 travels along the second through-hole 28 in the second body 30 through the communication passage 44, and deflects the second check valve 78 in the direction of the arrow to cause the second check valve 78 to flex. Go through 78. The pressure fluid that has passed through the second check valve 78 is led out of the first fluid pressure inlet / outlet port 96 of the pipe joint part 34 via the second passage 90 and the third passage 94.

As described above, in the speed controller 20 according to the present embodiment, the first needle valve portion 36 is disposed inside the first body 24, and the inside of the second body 30 orthogonal to the first body 24 is provided. The first fluid pressure inlet / outlet port 96 is provided by disposing a second needle valve portion 38 at the first port and a first check valve 66 and a second check valve 78 for restricting the flow direction of the pressure fluid to opposite directions. From the second
A pressure fluid flowing toward the fluid pressure input / output port 62;
Contrary to the above, it is possible to control both the pressure fluid flowing from the second fluid pressure input / output port 62 toward the first fluid pressure input / output port 96.

Therefore, in the speed controller 20 according to the present embodiment, compared to the speed controllers 1 and 2 according to the prior art, two of which are connected in series, the piping space (installation space) is reduced and the mounting work is reduced. It is possible to simplify and reduce the size and weight.

In the speed controller 20 according to the present embodiment, the second body 30 is provided rotatably about the axis of the first body 24 in the direction of arrow A, and the axis of the connecting portion 32 is As the pipe joint 34
Are provided rotatably in the direction of arrow B. Therefore, in the speed controller 20 according to the present embodiment, as compared with the related art in which the speed controllers 1 and 2 are connected in series, the speed controller 20 is connected via a tube or the like.
There is no restriction on the direction in which the pressure fluid is removed from the fluid.

[0040]

According to the present invention, the following effects can be obtained.

That is, in contrast to the prior art in which two speed controllers are connected in series, in the present invention, one speed controller allows the first fluid pressure input / output port and the second fluid pressure input / output port to be connected to each other. Since the pressurized fluid flowing in the opposite direction can be controlled together, the piping space (installation space) can be reduced, and the mounting work can be simplified to reduce the size and weight.

Further, in the present invention, the first body, the second body, and the pipe joint that constitute the speed controller main body are provided so as to be rotatable in predetermined directions, respectively.
The direction in which the pressure fluid is removed is not restricted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a speed controller according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view taken along the line II-II shown in FIG.

FIG. 3 is a partial vertical sectional view taken along a line III-III shown in FIG. 2;

FIG. 4 is a circuit configuration diagram in which the speed controller shown in FIG. 1 is incorporated in a cylinder.

FIG. 5 is an operation explanatory diagram showing a flow state of a pressure fluid based on FIG. 3;

FIG. 6 is an operation explanatory diagram showing a flow state of a pressure fluid based on FIG. 2;

FIG. 7 is an operation explanatory diagram showing a state in which a pressure fluid flows in a direction opposite to that of FIG. 6;

FIG. 8 is a circuit configuration diagram in which a speed controller according to the related art is incorporated in a cylinder.

FIG. 9 is a longitudinal sectional view of a speed controller according to the related art.

[Explanation of symbols]

Reference Signs List 20 speed controller 22, 28 through hole 24, 30 body 32 connecting part 34 pipe joint part 36, 38 needle valve part 40, 42 operating part 44 communication path 48, 72 needle valve body 50 76: throttle portions 54, 60, 82 ... screw portions 56, 84 ... knob portions 58, 86 ... lock nuts 66, 78 ... check valves 68, 88 ... seat portions 70, 90, 9
4. Passageway 62, 96 ... Fluid pressure inlet / outlet port 92 ... Pipe fitting body 98 ... One-touch fitting mechanism 108 ... Chamber

Claims (5)

[Claims] A speed controller main body having a first fluid pressure inlet / outlet port and a second fluid pressure inlet / outlet port;
A first needle valve section that faces a fluid passage that connects the fluid pressure inlet / outlet port and the second fluid pressure inlet / outlet port, and adjusts a flow rate of a pressure fluid flowing through the fluid passage; and the first needle in the speed controller body. A second needle valve portion that is provided substantially orthogonal to the valve portion and that adjusts the flow rate of the pressure fluid flowing through the fluid passage.
The pressure fluid flowing from the fluid pressure input / output port and discharged from the second fluid pressure input / output port is controlled. A speed controller for controlling a pressure fluid discharged from an access port. 2. The speed controller according to claim 1, wherein the speed controller body includes a first body and a second body that are orthogonal to each other, and a rod-shaped first needle valve body is disposed inside the first body. And a rod-shaped second needle valve main body is disposed inside the second body. 3. The speed controller according to claim 1, wherein a first check valve and a second check valve are arranged in the speed controller main body so that a flow direction of the pressure fluid is opposite to each other. Characterized speed controller. 4. The speed controller according to claim 1, wherein the main body of the speed controller includes a first body and a second body that are orthogonal to each other, and is provided at one end of the first body. Is provided with a first operating portion for setting the throttle amount of the first needle valve portion, and a second operating portion for setting the throttle amount of the second needle valve portion is provided at one end of the second body. A speed controller characterized by that: 5. The speed controller according to claim 1, wherein the main body of the speed controller has a cylindrical first body, an axis perpendicular to the first body, and an axis of the first body. A second body that rotates in a predetermined direction as a rotation axis; and an elbow-shaped pipe joint that rotates in a predetermined direction about an axis of a connecting portion protruding from the second body. A speed controller, wherein the two-needle valve portion is provided substantially orthogonally along the axis of the first body and the second body.