JPH1195843A - Pressure regulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a backlash in a joint with simple structure and to improve transmission precision by providing flexible counter members which are arranged opposite to a coupling joint for rotational driving force transmission and providing a coupling part for a rotary driving system in the center of one member and a coupling part for a pressure regulating screw in the center of the other member. SOLUTION: The coupling joint 20 connected to the rotary driving system 10 of the pressure regulating device 1 is equipped with flexible counter members 21 and 25 with circular outer peripheries almost opposite forming a closed space part E. Then one counter member 21 is cut circularly almost at its center part to form the coupling part for the rotary driving system with its peripheral edge 21a. The other counter member 25 is also cut circularly almost at its center part to form the coupling part for a pressure regulating screw 32 with the peripheral edge 25 of the circularly cut part. The materials, thicknesses, and shapes of the counter members 21 and 25 are so designed that the counter members 21 and 25 do not deform in the rotating direction of the axes, but deform as to axial movement displacement quantities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure regulating device such as a pressure regulating valve, and more particularly, to a pressure regulating screw via a coupling joint for transmitting a specific rotational driving force to enable automatic pressure regulation control. And a pressure control device having a rotary drive system connected thereto.

[0002]

2. Description of the Related Art In recent years, FA (factory automation) has rapidly progressed, and accordingly, the amount of pneumatic equipment used has been increasing.

In using a pneumatic device, air from an air pressure source is compressed by a compressor. If the air itself has a pulsation or is considerably higher than the working pressure, it cannot be used as a pressure source as it is. Therefore, when trying to move the air cylinder or the air rotor, it is necessary to prevent the pulsation of the supplied compressed air and reduce the pressure to a required pressure. Furthermore, even if the pressure of the air pressure source changes, the depressurized air needs to be stable, and it may be necessary to ensure an accurate flow rate.

As a device for automatically adjusting the pressure in response to such a demand, there is a pressure adjusting device such as a pressure adjusting valve. Pressure regulators may require remote control for automation. In this case, it is necessary to connect a rotation drive system to the pressure adjustment screw of the pressure adjustment device and accurately transmit the driving force from the rotation drive system to the pressure adjustment device. When such a system is assembled, the pressure adjusting screw itself moves up and down by rotation from the rotary drive system (that is, an axial displacement amount is generated). It is necessary to intervene. In this case, in order to maintain the working accuracy of the pressure adjusting device, strict transmission accuracy is required not only of the accuracy of the pressure adjusting device and the rotary drive system itself, but also of the connecting joint used.

FIG. 6 shows an example of a coupling joint for transmitting a driving force, which has been generally used conventionally. In this figure, a coupling joint 100 for transmitting a driving force has a rod-shaped fitting male member 110 and a cylindrical fitting female member 120. A pair of pin-shaped projecting protrusions 115 are formed on the outer periphery of the rod-shaped fitting male member 110 so as to protrude inward from the distal end of the cylindrical fitting female member 120 by a predetermined length. Cut grooves 125, 125 are formed. Then, by inserting the rod-shaped fitting male member 110 into the tubular fitting female member 120 and combining them, the pair of pin-shaped projections 115, 115 are inserted into the cut grooves 125, 125. It is to be inserted. Accordingly, the rotational force in the axial direction generated from the drive system 130 is applied to the pin-shaped projections 115, 115 and the cut grooves 125, 115.
The engagement with 125 causes transmission to operating system 140 of the pressure regulating device main body.

[0006] In such a conventional coupling joint 100 for transmitting driving force, the cut grooves 125, 125 are formed with a margin to a predetermined length, and pin-shaped projections 115, 115 are formed in the cut grooves 125, 125. Is configured to be slidable, so that the amount of axial displacement can be absorbed and buffered.

[0007]

However, a backlash due to a small gap is generated at an engagement portion between the pin-shaped projections 115, 115 and the cut grooves 125, 125. The transmission accuracy is not sufficient. In particular, this is a problem in the case of a pressure regulating device that requires precise control. In addition, it is structurally difficult to absorb and buffer (allow) a misalignment between the rod-shaped fitting male member 110 and the cylindrical fitting female member 120, which is usually slightly generated during assembly, and requires a great deal of assembly. There is also a problem of requiring a lot of labor.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of such circumstances, and its purpose is not only to enable automatic pressure regulation control but also to have a simple structure.
There is no backlash in the joint, extremely high transmission accuracy, and a coupling joint for transmitting rotational driving force that can absorb and buffer slight axial displacement and axial displacement. A pressure regulating device is provided. As a result, automatic control by remote control becomes possible while maintaining excellent accuracy of the pressure regulating device itself. Further, assembly can be easily performed because the axis deviation can be tolerated.

[0009]

In order to solve such a problem, a pressure regulator of the present invention adjusts an output-side secondary pressure when an input primary pressure is output as a secondary pressure. Pressure adjusting device main body, a pressure adjusting screw connected to the pressure adjusting device main body for setting a secondary pressure on the output side, and a rotational drive for adjusting the degree of pressure adjustment by turning the pressure adjusting screw. And a connection joint for transmitting a rotational driving force interposed between the pressure adjusting screw and the rotational driving system, wherein the coupling joint for transmitting the rotational driving force is a predetermined joint. An outer circumferential flexible opposing member disposed substantially opposing to form a closed space portion, and one of the opposing members includes a coupling portion with a rotation drive system substantially at the center thereof; The other member of
It is configured to have a connection portion with a pressure adjusting screw substantially at the center thereof.

In the connecting joint for transmitting the rotational driving force used in the present invention, the opposing member is not substantially deformed in the rotational direction, but is deformed only in the axial displacement. It is set and configured to occur.

[0011] Further, in the connecting joint for transmitting a rotational driving force used in the present invention, preferably, the opposing member thereof is:
It is configured to be made of resin.

In the coupling for transmitting rotational driving force used in the present invention, one and the other of the opposing members each have a bowl shape, and the peripheral edges of these members are joined to each other. It is configured as follows.

In the coupling for transmitting rotational driving force used in the present invention, one of the opposing members has a flat plate shape, the other of the opposing members has a bowl shape, and peripheral portions of these members are formed. Are joined to each other.

In the coupling for transmitting rotational driving force used in the present invention, one of the opposing members and the other of the opposing members each have a flat plate shape, and the peripheral edge of these members is a ring-shaped side member. It is comprised so that it may mutually be joined.

[0015] In the coupling for transmitting rotational driving force used in the present invention, the opposing member having a bowl shape has a plurality of protruding ribs extending radially from the center on the curved surface toward the outer periphery. It is configured to be provided.

Further, when the connecting portion with the pressure adjusting screw moves along with the axial movement of the pressure adjusting screw, the outer peripheral circular opposing member arranged substantially opposingly deforms to reduce the axial displacement. It is configured to absorb and buffer.

Further, a control unit for controlling a rotation amount is connected to the rotation drive system.

The connecting joint for transmitting a rotational driving force used in the present invention includes a flexible opposing member having a circular outer periphery substantially opposed to each other so as to form a predetermined closed space. Therefore, since no substantial deformation of the opposing member is generated and the deformation of the opposing member is generated only with respect to the amount of displacement in the axial direction, no backlash occurs when transmitting the rotational driving force. When an axial displacement occurs, it acts to absorb and buffer the displacement. Therefore, the transmission accuracy of the connecting joint for transmitting the rotational driving force is extremely good, and automatic control by remote control becomes possible while maintaining the excellent accuracy of the pressure regulating device itself. Further, assembly can be easily performed because the axis deviation can be tolerated.

[0019]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show a first preferred embodiment of the pressure regulating device of the present invention. FIG. 1 is a front view of a pressure adjusting device in which a main part is sectioned including a use state of a connection joint for transmitting a rotational driving force (hereinafter, simply referred to as a “connection joint”) used in the present invention; FIG. 2 is a side view of FIG.

In these figures, a pressure regulating device 1 of the present invention is shown.
Outputs the input primary pressure (indicated by an arrow IN from the lower right in FIG. 1) as a secondary pressure (indicated by an arrow OUT extending to the lower left in FIG. 1), A pressure adjusting device main body 30 for adjusting the secondary pressure, a pressure adjusting screw 32 connected to the pressure adjusting device main body 30 for setting a secondary pressure on the output side, and a pressure adjusting screw which is turned by the pressure adjusting screw. It comprises a rotary drive system 10 for adjusting the degree and a coupling joint 20 for transmitting a rotary drive force interposed between the pressure adjusting screw 32 and the rotary drive system 10.

The rotary drive system 10 is provided with a motor as a rotary drive source, and it is preferable that the motor be provided with a stepping motor having extremely high accuracy and enabling remote control. In this case, the rotation drive system 10 is generally connected to a control unit for controlling the rotation amount.

A connecting member 14 is fixed to the motor shaft 12 of the rotary drive system 10. Usually, the size of the connecting member 14 is set so that the connecting member 20 can be easily fixed to the connecting joint 20 and the fixing area is increased so that local stress is not applied to the connecting joint 20 as much as possible.

The coupling joint 20 connected to the rotary drive system 10 includes flexible opposing members 21 and 25 each having a circular outer periphery and substantially opposed to each other so as to form a predetermined closed space E. ing. As shown in the drawing, one of the opposing members 21 has a substantially center cut out in a circular shape.
As a result, the peripheral edge 21a of the circular notch forms a connection with the rotary drive system. The other member 2 of the opposing member
Similarly to the member 21, the substantially center thereof is cut out in a circular shape, so that the peripheral edge 25 a of the circular cut-out portion is substantially connected to the pressure adjusting screw 32 (the connecting member 3).
4). Note that the closed space E may or may not maintain airtightness.

In the present embodiment, the formation of the connecting portion of the connecting joint 20 (the connection to the rotary drive system and the driven operating system) is shown as a circular cutout, but the present invention is not limited to this. Instead, various forms are possible. FIG.
In the embodiment shown in FIG. 2 and FIG. 2, one and the other members 21 and 25 of the opposing members each have a bowl shape as shown in the figure, and the peripheral edges of these members are joined to each other to form a ring-shaped fixing member. It is fixed at 28. Note that, without using the fixing member 28, the facing members 21 and
After installing 5, these peripheral portions can be fused and fixed.

When designing the material, thickness, shape and the like of the opposed members 21 and 25 of the coupling joint 20 used in the present invention,
No substantial deformation of the opposing members 21 and 25 occurs in the rotation direction of the shaft, and the amount of displacement in the axial direction (FIG.
It is necessary to design so that the deformation of the facing member occurs only for (b)). The above-mentioned “substantial deformation does not occur” refers to a state in which the rotation driving force is not deformed within a range that can be accurately transmitted. As the material of the facing members 21 and 25, a material having flexibility, that is, a resin or a metal having a limited thickness can be used. However, in consideration of durability such as repeated fatigue, ease of manufacturing, and the like, resin is used. It is most preferred to use. The resin to be used may be either a thermoplastic resin or a thermosetting resin, and the specific thickness, shape, and the like may be appropriately set in consideration of the above-described deformability. Further, by forming each of the opposing members 21 and 25 into a bowl shape as shown in the figure, there is an excellent merit that the allowable range of the axial displacement can be widened and the displacement can be set in a wide range.

As shown, a pressure adjusting screw 32 is substantially connected to the other member 25 of the opposed members. Pressure adjusting screw 32
Is substantially integrated with the pressure regulating device main body 30. By rotating the pressure regulating screw 32 and moving it up and down in the axial direction, the output side of the pressure regulating device main body 30 is The next pressure can be adjusted.

The pressure regulating device main body 30 is not particularly limited as long as it has a mechanism capable of adjusting the secondary pressure on the output side when the input primary pressure is output as the secondary pressure. Things are used. As the structure itself, various types of regulators have been commercialized,
In the present invention, the main parts of these devices can be used as they are. Since the present invention aims at realizing a high-precision pressure adjusting operation as a whole of the apparatus, it is desirable to adopt a high-precision pressure adjusting device body 30 itself.

FIG. 3 shows a connecting joint 2 used in the present invention.
0 a second embodiment is shown. The connection joint of the second embodiment differs from that of the first embodiment (FIGS. 1 and 2) in that one of the bowl-shaped opposing members 25 is replaced with a substantially plate-shaped opposing member 22. It is in. In this case, although the allowable range of the axial displacement is small, there is an advantage that the manufacturing is relatively easy.

FIG. 4 shows a connecting joint 2 used in the present invention.
0 a third embodiment is shown. In the connection joint of the third embodiment, one of the opposing members and the other
Each of the members 3 and 24 has a flat plate shape, and the peripheral portions of these members are joined to each other via a ring-shaped inwardly curved side surface member 29 as shown in the figure. In the case of the third embodiment, there is an advantage that a coupling joint having various deformation characteristics can be obtained by appropriately changing and combining the materials of the opposing members 23 and 24 and the side member 29.

FIG. 5 shows a connecting joint 2 used in the present invention.
0 a fourth embodiment is shown. The connection joint of the fourth embodiment differs from that of the first embodiment (FIGS. 1 and 2) in that a plurality of ribs 27 are provided on a curved surface of a bowl-shaped facing member 26. . In this more preferred embodiment, the ribs 27 are formed as a plurality of protrusions extending radially from the center to the outer periphery on the curved surface. By providing the rib 27, the strength in the rotational direction can be further increased, and substantial deformation of the opposing member in the rotational direction can be more reliably eliminated. Further, it is also possible to reduce the molding thickness of the facing member and reduce the cost. In addition, the form of the rib can be adopted as long as it can perform the above-mentioned action. For example, the form composed of a plurality of concentric projections along the outer circumference of the facing member, It is also possible to adopt a form composed of spiral-shaped protrusions.

As described above, the connecting joint 2 used in the present invention
0 indicates that no substantial deformation of the opposing member occurs in the rotation direction, and when the connection portion with the pressure adjusting screw moves in accordance with the axial movement of the pressure adjusting screw, the outer peripheral portion opposingly disposed. Since the circular opposing member is configured to be deformed to absorb and buffer the axial displacement, there is no backlash in the joint, and the transmission accuracy is extremely good. Furthermore, it is also possible to absorb a slight axis deviation and to cushion the axis.

[0032]

As described above, the pressure regulating device of the present invention comprises: a pressure regulating device main body for regulating the output-side secondary pressure when the input primary pressure is output as the secondary pressure; A pressure adjusting screw connected to the pressure adjusting device main body to set a secondary pressure on the output side, a rotation drive system for adjusting the degree of pressure adjustment by turning the pressure adjusting screw, and the pressure adjusting screw. A connection joint for transmitting rotational driving force interposed between the rotational driving system and a coupling joint for transmitting rotational driving force, wherein the coupling joint for transmitting rotational driving force forms a predetermined closed space. It comprises a flexible opposing member having an outer peripheral circular shape arranged substantially opposing, and one of the opposing members includes a connection portion with a rotation drive system at substantially the center thereof,
The other member of the opposing member is configured to have a connection portion with the pressure adjusting screw substantially at the center thereof, and no substantial deformation of the opposing member occurs in the rotation direction, and the axial displacement It is set so that the deformation of the opposing member occurs only with respect to the amount, so the backlash at the joint
There is no backlash and the transmission accuracy is extremely good. Furthermore,
It is also possible to absorb and offset a slight axis deviation. As a result, the pressure regulator of the present invention can be automatically controlled by remote control while maintaining excellent accuracy of the pressure regulator itself. Further, assembly can be easily performed because the axis deviation can be tolerated.

[Brief description of the drawings]

FIG. 1 is a front view of a pressure regulating device of the present invention (a main portion of a coupling joint is shown in a cross section).

FIG. 2 is a side view of FIG.

FIG. 3 is a cross-sectional view showing a second embodiment of the connection joint used in the present invention.

FIG. 4 is a cross-sectional view showing a third embodiment of the connection joint used in the present invention.

FIG. 5 is a perspective view showing a fourth embodiment of a connection joint used in the present invention (however, only one opposing member is shown).

FIG. 6 is a perspective view for explaining an example of a coupling joint generally used conventionally.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure adjusting device 10 ... Rotation drive system 20 ... Connection joint 21, 25 ... Opposing member 21, 22 ... Opposing member 23, 24 ... Opposing member 26 ... Opposing member (one side) 21a, 25a ... Connection part 28 ... Fixed member 30 … Pressure adjusting device 32… Pressure adjusting screw E… Closed space

Claims (9)

[Claims] 1. A pressure regulating device main body for adjusting a secondary pressure on an output side when an input primary pressure is output as a secondary pressure, and the pressure regulating device for setting a secondary pressure on an output side. A pressure adjusting screw connected to a device main body; a rotation drive system for adjusting the degree of pressure adjustment by turning the pressure adjustment screw; and a rotational driving force interposed between the pressure adjustment screw and the rotation drive system. A coupling joint for transmission, wherein the coupling joint for transmitting the rotational driving force is a flexible outer peripheral circular opposing member that is disposed substantially opposing to form a predetermined closed space. One member of the opposing member is provided with a connection portion with the rotary drive system at substantially the center thereof, and the other member of the opposing member is provided with a connection portion with the pressure adjusting screw at substantially the center thereof. A pressure regulating device characterized by the above-mentioned. 2. The coupling member according to claim 1, wherein the opposing member is not substantially deformed in the rotational direction, but is deformed only in the axial displacement. The pressure regulating device according to claim 1, wherein the pressure regulating device is set to: 3. The pressure regulating device according to claim 1, wherein the facing member is made of resin. 4. The pressure regulating device according to claim 1, wherein one of the opposing members and the other member each have a bowl shape, and peripheral portions of these members are joined to each other. apparatus. 5. The device according to claim 1, wherein one of the opposed members has a flat plate shape, and the other of the opposed members has a bowl shape, and peripheral portions of these members are joined to each other. The pressure regulating device according to any one of the above. 6. The device according to claim 1, wherein one of the opposing members and the other member have a flat plate shape, and peripheral portions of these members are joined to each other via a ring-shaped side member. The pressure regulating device according to any one of the above. 7. The tuning device according to claim 4, wherein the bowl-shaped facing member includes a plurality of protruding ribs extending radially from a central portion on a curved surface to an outer peripheral portion. Pressure device. 8. When the connecting portion with the pressure adjusting screw moves in accordance with the axial movement of the pressure adjusting screw, the substantially circularly opposed outer circumferentially opposed member is deformed to reduce the axial displacement. The pressure regulating device according to claim 1, wherein the pressure regulating device is configured to absorb and buffer. 9. A control unit for controlling a rotation amount is connected to the rotation drive system.
The pressure regulating device according to any one of the above.