JPH0673405U - Actuator - Google Patents

Abstract

(57) [Summary] [Objective] The present invention provides a compact actuator that does not have air piping outside the cylinder and is easy to assemble. [Arrangement] Cylinder chambers A2 and B3 are provided on the left and right of the rotary shaft 9 in the actuator 1, and end portions are inserted into these cylinder chambers, respectively, and pistons A7 and B8 are provided to perform linear motion. One lot 6 was set up. Two air holes 18 and 19 are provided in the lot 6, and the air holes 18 serve as the first air chamber 14 of the cylinder chamber A2.
And the fourth air chamber 17 of the cylinder chamber B3 are communicated with each other, while the air hole 19 communicates with the second air chamber 15 of the cylinder chamber A2 and the third air chamber 16 of the cylinder chamber B3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an actuator in which linear motion is replaced by rotary motion and a valve or the like is driven via a rotary shaft.

[0002]

[Prior art]

 An actuator that combines a cylinder mechanism and a rotary shaft has been known as a mechanism for opening and closing valves and the like. For example, it is as shown in Japanese Utility Model Publication No. 2-7283. In this example, pistons are provided in each of the cylinder chambers on the left and right around the rotation axis, and two air ports for supplying and exhausting air to and from the cylinder chamber are required to interlock these pistons, for a total of four air ports. It has a structure in which the pipe connecting the is attached to the outside of the cylinder.

[0003]

[Problems to be solved by the device]

 However, with the above configuration, the piping that connects each air port is located outside the cylinder, which not only saves space in the installation location and requires additional piping work, but also damages the piping during this work. There was a drawback that An object of the present invention is to solve the above-mentioned drawbacks and to provide an actuator which is compact without air piping outside the cylinder and which is easy to assemble.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an actuator for driving a valve or the like via a rotary shaft instead of a linear motion to a rotary motion by providing cylinder chambers A and B on the left and right around the rotary shaft. One lot with the ends inserted into the cylinder chamber, each equipped with pistons A and B, and having linear motion, and a conversion part for converting the linear motion of this lot into the rotational motion of the rotary shaft are provided. , An air port for supplying and exhausting a piston as a boundary is provided in either of the cylinder chambers A and B, and the first air chamber of the cylinder chamber A and the fourth air chamber of the cylinder chamber B communicate with each other and An actuator provided with two air holes in the lot so that the second air chamber and the third air chamber of the cylinder chamber B communicate with each other.

[0005]

[Action]

 In the present invention, two air holes are provided in the lot, one air hole communicates the first air chamber of the cylinder chamber A and the fourth air chamber of the cylinder chamber B, and the other air hole is the cylinder chamber A. The second air chamber of B and the third air chamber of the cylinder chamber B are communicated with each other. Therefore, the pistons A and B are smoothly interlocked with each other by supplying or discharging the piston driving air or the like to or from one of the cylinder chambers A and B, and the rotary shaft is rotated through the conversion portion to drive the valve or the like. .

[0006]

【Example】

 An example of the actuator of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an actuator, which is provided with a cylinder chamber A2 and a cylinder chamber B3 on the left and right around a rotation axis. Partition walls 4 and 5 respectively form one wall of the cylinder chamber A 2 and the cylinder chamber B 3. 6 is a lot, both ends of which are inserted into the cylinder chamber A2 and the cylinder chamber B3 through the partition plates 4 and 5, respectively, and the pistons A7 and B8 are provided at both ends. Reference numeral 9 denotes a rotating shaft, which drives the valve and other main bodies. Reference numeral 10 denotes an arm, which is attached to the rotary shaft 9, and which is engaged with a pin 12 provided on the lot 6 through a groove 11 to convert a linear motion of the piston into a rotary motion of the rotary shaft 9 by a conversion unit 13. Constitute. The cylinder chamber A2 forms a first air chamber 14 and a second air chamber 15 with the piston 7 as a boundary, and the cylinder chamber B3 forms a third air chamber 16 and a fourth air chamber 17 with the piston 8 as a boundary. is doing. Reference numerals 18 and 19 denote air holes, which are provided in the lot 6. The air holes 18 communicate the first air chamber 14 and the fourth air chamber 17, while the air holes 19 are the second air chamber 15 and the third air chamber. It communicates with 16. Reference numerals 20 and 21 are air ports, which are supply / discharge ports for nitrogen gas and the like.

FIG. 2 is an enlarged side cross-sectional view showing the conversion portion 13 in which the pin 12 on the lot 6 and the arm 10 provided on the rotary shaft 9 are engaged. Since the air holes 18 and 19 are provided in the lot 6 as described above, the communication between the cylinder chamber A2 and the cylinder chamber B3 is facilitated, and it is necessary to separately provide an air pipe outside the cylinder as in the conventional example. Is gone.

As described above, according to this embodiment, since it is not necessary to provide air piping outside the cylinder, it is possible to make the whole compact, and it is not necessary to separately perform air piping work. It is possible to provide an actuator that is easy to assemble such that each air chamber can be easily connected by simply installing it in the actuator.

[0009]

[Effect of device]

 The present invention provides two air holes in the lot as described above, and connects the first air chamber of the cylinder chamber A and the fourth air chamber of the cylinder chamber B through these air holes, and Since the second air chamber of the chamber A and the third air chamber of the cylinder chamber B are communicated with each other, it is possible to provide an actuator which is compact as a whole. Therefore, since the internal lot is used without installing the air pipe to the outside as in the past, it is not necessary to perform the piping work in addition to the installation of the actuator, and the pipe may be damaged. It became easier to install.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an actuator shown as an embodiment of the present invention.

FIG. 2 is an enlarged side cross-sectional view of a conversion unit showing engagement between a lot pin and an arm.

[Explanation of symbols]

 1 Actuator 2 Cylinder chamber A 3 Cylinder chamber B 6 Lot 7, 8 Piston 9 Rotating shaft 13 Conversion part 14, 15, 16, 17 Air chamber 18, 19 Air hole

Claims (1)

[Scope of utility model registration request] 1. An actuator for driving a valve or the like via a rotary shaft instead of linear motion to rotary motion. Cylinder chambers A and B are provided on the left and right around the rotary shaft, and end portions are inserted into these cylinder chambers. , Piston A, respectively
B is provided, and one lot that is adapted to perform linear motion is provided, and a conversion unit that converts the linear motion of this lot into the rotational motion of the rotary shaft is provided, and a piston is used as a boundary in either of the cylinder chambers A and B. An air port for supplying and exhausting air is provided so that the first air chamber of the cylinder chamber A and the fourth air chamber of the cylinder chamber B communicate with each other, and the second air chamber of the cylinder chamber A and the third air chamber of the cylinder chamber B are connected to each other. An actuator characterized in that two air holes are provided in the lot so as to communicate with each other.