JPS61218805A - Rotary actuator - Google Patents

Abstract

PURPOSE:To facilitate the mounting of a rotary actuator without any piping, by forming suction and exhaust ports in the mounting surface of the mount of the rotary actuator, for converting the reciprocating movement of a piston to the rotation of an output shaft. CONSTITUTION:A rotary actuator for converting the reciprocating movement of a piston 2 to the rotation of an output shaft 8a has a mount 22 for mounting a casing 3. Suction and exhaust ports 23 for taking in and discharging a fluid, respectively, are formed in the mounting surface of the mount 22. Thus, a piping tube is automatically connected to that of another member by mounting the casing 3 to said another member, via the mount 22, extremely facilitating the mounting of the rotary actuator.

Description

Detailed Description of the Invention: Limb Blood Separation The present invention is a rotary actuator that converts the reciprocating motion of a piston caused by fluid pressure into a rotational motion of a shaft and outputs the output, for example, for automatic opening/closing operation of various valves, and for operating a 90° rotation mechanism. The present invention relates to an actuator that can be used as a swing actuator for use in other purposes.

Ju” page 01 Rotary actuators of the above type are known.

A conventional rotary actuator has a cylinder part that has fluid intake and discharge ports at both ends and accommodates a reciprocating piston, and an output shaft part that is connected to the piston and rotates, which are formed as a single unit. A solenoid valve for operation, a pressure reducing valve, etc. are connected to the suction/discharge port via piping to operate the rotary actuator.

Plate H point Conventional rotary actuators require piping to install operating devices such as electromagnetic valves, so the installation process is time-consuming and there is a problem in that a large amount of space is required for the operating devices.

The present invention solves the above problems by providing an operating device mounting seat on at least one side of the main body of a rotary actuator, and installing a cylinder casing between the suction and exhaust ports at both ends of the cylinder portion and the mounting seat. The problem was solved by using a rotary actuator that can be connected to a flow path formed in the air and which allows operation equipment to be attached without piping.

According to the present invention, by directly fixing any operating device such as a solenoid valve or pressure reducing valve to the mounting seat with bolts or the like, the device and the flow path opening provided in the mounting seat are communicated with each other, and the operating device can be connected to the operating device without piping. A rotary actuator can be connected. A rotary actuator with an operating device can be configured as one compact unit by connecting other devices without piping or integrally configuring the device mounted on the mounting seat.

In FIGS. 1 to 4, a rotary actuator 1 includes a cylinder portion having a piston 2 and a cylinder case 3 that accommodates the piston 2 so as to be able to slide back and forth, and a cylinder portion that is formed integrally with the cylinder case 3 and faces each other. It has an output shaft part 9 including an output shaft 8 rotatably supported by the first support part 4 and the second support part 5 arranged through a metal 6.7.

The piston 2 has two piston parts 2a and 2b and a bridge part 2C that connects both piston parts. The bridge portion 2C is formed so as to avoid the position of the output shaft 8.

A fork-shaped arm 10 is attached to the output shaft 8 so as not to be relatively rotatable, and a fork end portion of the arm 10 is engaged with a pin 11 attached to the bridge portion 2C. A ring 12 is fitted into the pin 11 to facilitate sliding on the arm 10. The pin 11 and the arm 10 constitute a connecting portion.

The output shaft 8 is connected to the support part 4 by means of stop rings 13 and 14.
5 to prevent it from falling off.

Both ends of the cylinder case 3 are sealed by flanges 15.16, and the piston portion 2a is attached to the flanges 15.16.
Alternatively, an adjusting screw 17 that comes into contact with 2b to determine the limit position of the piston is screwed in and can be fixed in position with a nut 18.

The main body is composed of the cylinder case 3, the first support part 4, the second support part 5, and the flanges 15 and 16. The second support part 5 has an output shaft 8 with a pointer 19 attached to the output shaft 8.
Scales 20 indicating rotation angles are integrally formed at predetermined angular intervals.

Connecting end 8a of square cross section of output shaft 8 to square hole of pointer 19
It has a structure in which it is inserted into the body and fixed with a stop ring 21. Generally, by rotating the output shaft 8 by 90 degrees,
It opens and closes valves connected to the output shaft 8, switches, etc. The pointer 19 can be used to point to the scale on the right side or the scale on the left side of the plane orthogonal to the cylinder axis. For example, if the output shaft 8 is switched from the closed position to the open position by clockwise rotation while pointing to the scale on the right side, the output shaft 8 is switched from open to closed by counterclockwise rotation. In this state, if you change the position of the pointer 19 so that it points to the scale on the left, the output shaft can be used as a scale so that it switches from open to closed when rotated clockwise and from closed to open when rotated counterclockwise. can.

For this purpose, it is preferable to write open/close symbols at opposite positions in a plane perpendicular to the cylinder axis. In Figure 1, the output shaft 8 is shown with the symbol "0" for "open" and the symbol "S" for "closed".
There is an advantage that the pointer 19 can be easily adapted by simply changing the attachment state of the pointer 19 according to the opening/closing direction of the member attached to the pointer 19.

A mounting seat 22 is formed on the side of the cylinder case 3, and a solenoid valve or the like is mounted on the mounting seat 22.

The mounting seat 22 is formed with an opening 23.23, which is connected to the flange 15 by passages 24 and 25 formed in the cylinder case 3, respectively, as shown in FIG.
．． The space on the 16 side communicates with the left and right chambers of the piston portions 2a and 2b, respectively.

1 to 5 show a double-acting rotary actuator that operates by alternately switching the flow paths 24 and 25 to the suction side and the discharge side by the switching operation of a solenoid valve mounted directly or indirectly on the mounting seat 22. As a modification, as shown in FIGS. 6 and 7, a single-acting rotary actuator 1' can be formed by fixing a spring cartridge 26 to the cylinder case 3 instead of one flange, for example, the flange 15. can.

The spring cartridge 26 includes a cartridge case 27, a sleeve-shaped spring receiver 2B supported in the cartridge case 27, a spring guide 29 slidably attached to the spring receiver, and a spring receiver fixed to the spring guide 29. has a disk 30, a spring 31 stretched between the spring receiver 28 and the disk 30, and when the spring receiver is fixed to the cylinder case 3, the disk 30 of the spring receiver is connected to the piston 2 ( In the figure, it is pressed into contact with 2a).

When fluid is supplied by the action of the electromagnetic valve attached to the mounting seat 22, the piston 2 is pushed to the left in the figure against the force of the spring 31. The amount of movement of the piston is adjusted by the screwing amount of an adjustment screw 32 screwed into the cartridge case 27.

When the fluid is discharged by switching the solenoid valve, the piston 2 returns to its initial position by the force of the spring 31.

Although no particular explanation has been given for each of the rotary actuators described above, measures are taken to prevent fluid leakage at necessary portions using known sealing members.

By directly attaching a solenoid valve to the mounting seat 22 of the rotary actuator 1'' described above, a rotary actuator 1'' integrated with a pipeless operation valve is obtained as an example, as shown in FIGS. 8 to 10.

An embodiment of the electromagnetic valve used in the rotary actuator 1'' with integrated operation valve shown in FIGS. 8 to 10 will be described with reference to FIGS. 1I and 12.

The solenoid valve 40 has a main valve 41 and a pilot valve 42.

The main valve 41 has a valve body 43 that directly abuts the mounting seat 22 of the rotary actuator and can be fixed with bolts.

The mounting seat 2 is located exactly on the surface of the valve body 43 that comes into contact with the mounting seat 22.
A first output port 44 and a second output port 45 are opened at positions communicating with the two openings 23 and 23, respectively.

A spool 90 is attached to the spool hole 46 of the valve body 43 so as to be able to slide back and forth. The through hole 46 has a third annular groove 48 communicating with the air supply port 47, a first annular groove 50 communicating with the first exhaust port 49, a fifth annular groove 52 communicating with the second exhaust port 51, and the third annular groove 52 communicating with the second exhaust port 51. A second annular groove 53 communicating with the first output port 44 and a fourth annular groove 54 communicating with the second output port 45 are formed at appropriate positions, respectively. Valve body 4
3, a pilot operating flow path 56 is formed in the left end lid portion so as to be able to apply fluid pressure to one end of the spool 90 (left end in the figure).

A cylindrical hole 58 into which a spool piston 57 is slidably inserted is formed at the end of the spool 90 on the side opposite to the pilot operating flow path 56 side, and the cylindrical hole 58 is connected to the third annular groove 56 .
Two lands 59 of spool 90 located between 8
and 60 communicates with a flow path 61 formed inside the spool 90 so as to open to the circumferential surface of the spool 90. The spool piston 57 abuts against a lid 62 that seals the end of the valve body 43.

A bypass passage 63 connects the first output port 44 and the second output port 45, a bypass valve 64 is provided in the middle of the bypass passage 63 to open and close the bypass passage 63, and the bypass valve 64 is connected to the valve body. 43 protruding knob portions 65, and is configured such that by turning the knob portions 65, the valve body 66 is seated on or removed from a valve seat provided in the bypass passage 63. The knob 65 may also be structured to protrude toward the front or in other directions instead of upward in the figure.

A pilot air supply path 67 that passes through the valve body 43 and opens at the end of the lid portion 55 communicates with the air supply port 47 .

A casing 68 of the pilot valve 42 is fixed to the lid 55 of the main valve 41 with screws or the like.

The pilot valve 42 has a valve portion 69 and a solenoid portion 70. The solenoid section 70 has a fixed iron core 71, a movable iron core 72 arranged coaxially with the fixed iron core 71 and movable in the axial direction, and a fixed iron core 71 and the movable iron core 7 in a manner known per se.
2, and a yoke 74, which is housed in a solenoid casing 75.

The valve part 69 has an air supply path 76, a pilot flow path 77, and an exhaust path 7.
a casing 68 having an air supply passage 76 and a pilot passage 77 formed within the casing 68;
and a valve body 79 seated on a first valve seat 80 provided at the connection portion with the valve body. The valve body 79 connects the exhaust path 78 and the pilot flow path 77.
It is formed so that it can also be seated on a second valve seat 81 provided at a connecting portion between the valve seat and the valve seat. A leg 82 fixed to the valve body 79 acts as a valve stem, and is in contact with the movable core 72 of the solenoid section 70 by the action of a spring 83.

The excitation coil 73 is energized and the movable iron core 72 becomes the fixed iron core 71.
When the valve body 79 is attracted by the spring 83, the valve body 79 moves, opens the first valve seat 79, and seats on the second valve seat 81, and the second valve body 79 is moved.
Close the valve seat 81. At this time, the compressed air that is being supplied to the intake port 47 is supplied to the spool hole 46 through the intake passage 76 and the pilot flow passage 77. Compressed air acts on the spool 90 on the left side end surface in the drawing and on the cylindrical hole 58, but due to the difference in area, the spool 90 is pushed to the right in the drawing, toward the spool piston side. In a normal state in which the biloft channel 56 is closed, the spool 46 is held at the left end position in the figure by compressed air pressure acting on the cylindrical hole 58. In this normal state, compressed air is supplied from the air supply port 47 to the second output boat 45 and further from the opening 23 to the cylinder 3 via the flow path 25, thereby maintaining the piston 2 in the state shown in FIG.

When the solenoid section 70 is energized, the valve body 79 of the valve section 42 switches the flow path, and when compressed air acts on the pilot flow path 56, the spool 90 moves to the right in the figure, and the air supply port 47 is moved to the third annular shape. The groove 48 and the second annular groove 53 are connected to the first output boat 42 by communicating with each other. At this time, the space between the third annular groove 48 and the fourth annular groove 54 is closed, and the fourth annular groove 54 is closed.
4 and the fifth annular groove 52, the second output boat 45 is connected to the second exhaust port 51, and the compressed air acting on the piston 2a side of the rotary actuator is exhausted. Therefore, as compressed air is supplied through the first output boat 44, the opening 23, and the flow path 24, the piston 2 of the rotary actuator moves to the left in the figure, and the shaft 8 rotates 1 counterclockwise in FIG. do.

Although an example is shown in which one valve body is used as the valve body for the first valve seat 80 and the valve body 4 for the second valve seat 81, two valve bodies can also be used separately. Although the cartridge type valve body already proposed by the applicant is shown in which the seat and the valve body are housed in one small frame 84, the frame 8
4 may be integrally formed with the casing 68.

When the excitation coil 73 of the solenoid section 70 is deenergized, the spring 8
5 moves the movable core 72 away from the fixed core 71, closes the first valve seat 80 and opens the second valve seat 81. This causes the spool 46 to pass through the pilot flow path 56.
The compressed air acting on the air is discharged through the exhaust passage 78. In the illustrated example, the exhaust port is provided in the lid portion 55 and the exhaust path 78
is discharged from an exhaust port 86 provided in the lid portion 55. At this time, the pressure of the compressed air from the air supply port 47, which is constantly acting on the cylindrical hole 58 of the spool 90, returns to the position shown in the figure and is held to the left in the figure.

In this state, compressed air is supplied from the air supply port 47 to the piston portion 2a side of the cylinder casing 3 through the second output boat 45, the opening 23, and the flow path 25, and simultaneously acts on the piston portion 2b side of the cylinder casing 3. The compressed air is discharged from the first exhaust port 49 through the flow path 24, the opening 23, the first output port 44, and the gap connecting the first annular groove 50 and the second annular groove 53, and the piston 2 is discharged from the first exhaust port 49 as shown in FIG. is moved to the right in the diagram to the position shown in .

In the rotary actuator, there are cases where it is desired to manually move the output shaft 8, such as during a power outage. In such a case, if air pressure is acting on only one of the piston parts 2a and 2b in the cylinder casing 3, the output shaft 8 cannot be easily rotated.

At this time, when the knob 65 of the bypass valve 64 is turned to open the bypass passage 63 and communicate between the first output boat 44 and the second output port 45, the piston parts 2a and 2b are connected to each other in the cylinder casing 3. The acting forces become balanced. Therefore, in this state, the output shaft 8 can be easily rotated by hand.

The pilot valve 42 is not limited to the type shown in the figure, and any valve having any structure can be used as long as it can be fixed to the main valve 41 as long as it is a three-bottom, two-position switching valve.

The first exhaust port 49 and the second exhaust port 51 of the main valve 41 of the solenoid valve
A speed controller 86 can be connected to the speed controller 86 as shown in FIG.

When the piston 2 is in the normal state shown in FIG. 2 at the position of the pointer in FIG. The output shaft 8 rotates counterclockwise (indicated as left rotation in the figure) and switches to the closed (S) state.

When a device whose normal state is closed (S) and is switched to open (0) by the energization of the solenoid of the viroft valve section 42 is connected to the output shaft 8, the pointer 19 should be moved to the position shown in the figure as shown by the chain line. are installed 180° apart. In this state, counterclockwise rotation of the output shaft 8 switches from closed to open.

Conventionally, the use of a rotary actuator has been limited by attaching a scale plate, but it can be easily adapted to the equipment used by simply changing the attachment position of the pointer 19. Moreover, since the scale is integrally formed on the cylinder casing in advance, it is possible to provide the scale at an accurate position, and the problem of mounting errors that occurs with scale plates in the system of attaching the scale plate later can be solved.

According to the present invention, the mounting seat is integrally formed on the main body, and the flow path connecting the cylinder space and the opening of the mounting seat can be integrally formed on the main body, making it possible to easily mass-produce rotary actuators that are simple and have a smart appearance. Now you can.

Further, according to the present invention, by attaching a solenoid valve as an operating device to a mounting seat, a rotary actuator with an operating device without piping and having a simple structure can be obtained.

By turning the adjustment screws at both ends of the rotary actuator, the rotation angle position can be easily adjusted within a range of ±5° at both ends.

The rotary actuator has the advantage that it can be used as a common item even for devices whose opening/closing rotation direction is reversed by the simple operation of changing the position of the pointer.

[Brief explanation of drawings]

FIG. 1 is a plan view of a rotary actuator according to the present invention, FIG. 2 is a plan cross-sectional view, FIG. 3 is a front vertical cross-sectional view, and FIG.
5 is a partially cutaway front view, FIG. 6 is a partially cutaway plan view showing another embodiment of the single-acting rotary actuator, and FIG. 7 is a partially cutaway perspective view of the rotary actuator shown in FIG. Figure 8 is a front vertical sectional view of the actuator, and Figure 8 is a plan view of a rotary actuator with an operating device in which a solenoid valve with a speed controller is fixed as an example of the operating device.
Fig. 10 is a right side view of Fig. 9, Fig. 11 is a front vertical sectional view of the solenoid valve as an operating device, and Fig. 12 is a sectional view taken along line x-xn in Fig. 11. be. 1... Rotary actuator 2... Piston 3... Cylinder casing 8... Output shaft 10... Arm (connection part) 11
... Pin (connection part) 22 ... Mounting seat 23 ... Opening 24.25 ... Channel 40 ... Solenoid valve
41...Main valve 42...Pilot valve 44,4
5... Output boat 47... Air supply port 49.5
1...Exhaust port Figure 1 Figure 5

Claims (2)

[Claims] (1) A piston, a cylinder part that accommodates the piston in a reciprocating manner, an output shaft rotatably supported by the cylinder part and extending in a direction perpendicular to the axis of the cylinder part, and a piston and an output shaft. and a connecting member that converts the reciprocating linear motion of the piston into reciprocating rotational motion of the output shaft, the rotary actuator having a mounting seat integrally formed on at least one side surface of the cylinder body, and a mounting seat formed on the mounting seat. The cylinder is characterized by having two openings for sucking and discharging fluid, and a flow path formed in the main body and communicating each of the openings with the space at both ends of the cylinder part, so that an operating device can be attached without piping. rotary actuator. (2) A piston, a cylinder part that accommodates the piston in a reciprocating manner, an output shaft rotatably supported by the cylinder part and extending in a direction perpendicular to the axis of the cylinder part, and the piston and the output shaft. and a connecting member that converts the reciprocating linear motion of the piston into reciprocating rotational motion of the output shaft, the rotary actuator having a mounting seat integrally formed on at least one side surface of the cylinder body, and a mounting seat formed on the mounting seat. two openings for sucking and discharging fluid; a flow path formed in the main body and communicating each of the openings with spaces at both ends of the cylinder; and an operating solenoid valve removably fixed to the mounting seat. The operating solenoid valve has a main valve and a pilot valve part, and the main valve has two output ports formed on a surface that contacts the mounting seat at a position communicating with the opening; A rotary actuator characterized in that it has an air supply port and two exhaust ports that open on the other side, and that an operating device is integrally attached without piping.