Pneumatic actuator

Abstract

The present invention relates to the technical field of actuators. Provided is a pneumatic actuator, which can convert a linear piston motion into a rotary motion. The pneumatic actuator comprises: an actuator body, which comprises a cylinder body and a driving assembly arranged in the cylinder body; and at least one air storage cylinder, which is mounted on the cylinder body, wherein a connection channel is formed on one side wall of the cylinder body, and the connection channel is in communication with the inner space of the at least one air storage cylinder; a first hole and a second hole are formed in the outer side of the cylinder body; and the connection channel is in communication with the first hole and the second hole, such that an airflow can directly and smoothly enter and exit the at least one air storage cylinder through the connection channel. By means of the pneumatic actuator provided in the present invention, the airflow can directly enter and exit the air storage cylinder through the connection channel, such that the airflow between the connection channel and the air storage cylinder can be unobstructed; and just by using different solenoid valves, the safe reset direction of the pneumatic actuator can be changed without disassembling and reassembling the pneumatic actuator.

Description

A pneumatic actuator Technical Field

[0001] The present invention relates to the technical field of actuators, and in particular to a pneumatic actuator. Background Art

[0002] With the advent of automated industrial production, automatic control valves are increasingly being used in flow control. Pneumatic actuators, also known as pneumatic actuators or pneumatic heads, are devices that use air pressure to open, close, or regulate valves. They consist of an actuator body and an air reservoir mounted on it. Existing pneumatic actuators typically include single-acting and double-acting types.

[0003] Existing double-acting pneumatic actuators use air intake and exhaust to open and close the valve body. Without an air supply, the actuator cannot operate. Existing single-acting pneumatic actuators use a spring to open and close the valve body. This means that when an air supply is present, the spring's tension must be overcome before the rotor can rotate to open or close the valve body. Without an air supply, the actuator uses the spring's restoring force to return the rotor to its original position for safe return. However, as the spring recovers, the torque output to return the rotor to its original position decreases. Furthermore, if the return direction needs to be changed, the actuator must be disassembled and reassembled to change the safe return direction. Technical issues

[0004] In view of this, the present invention provides a pneumatic actuator that can solve or at least alleviate the above-mentioned problems, which can ensure unobstructed airflow between the connecting channel and the air storage cylinder, and can use different solenoid valves to change the direction of safe return of the pneumatic actuator without disassembling and reassembling the pneumatic actuator. Technical Solutions

[0005] The technical solution of the present invention is: a pneumatic actuator capable of converting linear piston motion into rotational motion, comprising: an actuator body, which includes a cylinder body and a drive assembly arranged in the cylinder body; and at least one air storage cylinder, which is installed on the cylinder body; a side wall of the cylinder body is provided with a connecting channel, the connecting channel is connected to the internal space of the at least one air storage cylinder, the outer side of the cylinder body is provided with a first hole and a second hole, the connecting channel is connected to the first hole and the second hole, and the air flow can directly and unimpededly enter and exit the at least one air storage cylinder from the connecting channel.

[0006] In some embodiments, the specifications of the at least one gas storage cylinder are replaceable.

[0007] In some embodiments, the connecting channel is a continuous passage.

[0008] In some embodiments, the connecting channel and the first hole are communicated through a first channel; the connecting channel and the second hole are communicated through a second channel.

[0009] In some embodiments, a third channel is provided at a position of the at least one gas storage cylinder corresponding to the connecting channel, and the third channel is connected to the inner space of the at least one gas storage cylinder.

[0010] In some embodiments, the third channel is L-shaped.

[0011] In some embodiments, the at least one air storage cylinder includes a first air storage cylinder and a second air storage cylinder respectively installed on both sides of the actuator body; a third channel is provided at the position of the first air storage cylinder corresponding to the connecting channel, which is connected to the internal space of the first air storage cylinder; a fourth channel is provided at the position of the second air storage cylinder corresponding to the connecting channel, which is connected to the interior of the second air storage cylinder.

[0012] In some embodiments, the fourth channel is L-shaped.

[0013] In some embodiments, the connecting channel is a discontinuous passage, and the connecting channel includes a first connecting channel and a second connecting channel, wherein the first connecting channel is connected to the first gas storage cylinder, and the second connecting channel is connected to the second gas storage cylinder.

[0014] In some embodiments, the connecting channel and the first hole are communicated through the first channel; the connecting channel and the second hole are communicated through the at least one gas storage cylinder.

[0015] In some embodiments, the cylinder body is provided with a first branch, the first branch is arranged along the axial direction of the cylinder body, the second hole is connected to the first branch through a second channel, the at least one air storage cylinder is provided with a second branch corresponding to the first branch, the second branch is connected to the internal space of the at least one air storage cylinder, the at least one air storage cylinder is provided with a third channel corresponding to the connecting channel, and the connecting channel is connected to the internal space of the at least one air storage cylinder through the third channel.

[0016] In some embodiments, the at least one air storage cylinder is a first air storage cylinder disposed on one side of the actuator body.

[0017] In some embodiments, a side wall of the cylinder body is provided with a connecting channel, and the connecting channel at least partially penetrates the side wall of the cylinder body along the axial direction of the cylinder body; an opening of the connecting channel is provided on a side of the cylinder body facing the first air storage cylinder.

[0018] In some embodiments, the connecting channel and the first hole are communicated through a first channel, and the connecting channel and the second hole are communicated through a second channel.

[0019] In some embodiments, a third channel is provided at a position of the first gas storage cylinder corresponding to the connecting channel, which is connected to the internal space of the first gas storage cylinder.

[0020] In some embodiments, the connecting channel and the first hole are communicated with each other through the first channel, and the second hole is communicated with the connecting channel through a first air storage cylinder.

[0021] In some embodiments, the cylinder body is provided with a first branch, the first branch is arranged along the axial direction of the cylinder body, the second hole is connected to the first branch through a second channel, the first air storage cylinder is provided with a second branch corresponding to the first branch, the second branch is connected to the internal space of the first air storage cylinder, the first air storage cylinder is provided with a third channel corresponding to the connecting channel, and the connecting channel is connected to the internal space of the first air storage cylinder through the third channel.

[0022] In some embodiments, the first branch partially penetrates the cylinder along the axial direction of the cylinder.

[0023] In some embodiments, the pneumatic actuator is a gear cylinder or a plug-in cylinder.

[0024] In some embodiments, a connecting pipe is provided on the side wall of the cylinder body; a third hole and a fourth hole are provided on the outer side of the cylinder body having the first hole and the second hole; the connecting pipe is connected to the third hole, and air flow can enter and exit the second space and the third space of the pneumatic actuator from the connecting pipe; the fourth hole is connected to the first space of the pneumatic actuator. Beneficial effects

[0025] Compared with the prior art, the present invention has at least the following beneficial effects: the airflow can directly enter and exit the air storage cylinder from the connecting channel, so that the airflow between the connecting channel and the air storage cylinder can be unobstructed, and different solenoid valves can be used to change the direction of the safe return of the pneumatic actuator without disassembling and reassembling the pneumatic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 shows a perspective view of a pneumatic actuator according to the present invention.

[0027] FIG. 2 shows an exploded view of the first embodiment of the pneumatic actuator shown in FIG. 1 .

[0028] FIG. 3A shows a plan view of the first embodiment of the pneumatic actuator shown in FIG. 1 .

[0029] FIG. 3B shows a cross-sectional view along line AA in FIG. 3A .

[0030] FIG. 4 shows a perspective view of a cylinder of the first embodiment of the pneumatic actuator shown in FIG. 1 .

[0031] FIG. 5A shows a plan view of the cylinder shown in FIG. 4 .

[0032] FIG. 5B shows a cross-sectional view along line BB in FIG. 5A .

[0033] FIG. 6 shows a cross-sectional view of a cylinder of a second embodiment of the pneumatic actuator shown in FIG. 1 .

[0034] FIG7 is a schematic diagram of a third embodiment of the pneumatic actuator shown in FIG1 , in which some structures are omitted.

[0035] FIG8 is a schematic diagram of a fourth embodiment of the pneumatic actuator shown in FIG1 , in which some structures are omitted.

[0036] FIG9 shows a perspective schematic diagram of another pneumatic actuator of the present invention.

[0037] FIG10 shows an exploded schematic diagram of the fifth embodiment of the pneumatic actuator shown in FIG9 , in which some structures are omitted.

[0038] FIG11 is an exploded schematic diagram of the sixth embodiment of the pneumatic actuator shown in FIG9 , in which some structures are omitted.

[0039] FIG12 is an exploded schematic diagram of the seventh embodiment of the pneumatic actuator shown in FIG9 , in which some structures are omitted.

[0040] Explanation of reference numerals: 1-actuator body; 11-cylinder body; 111-accommodation space; 112-connecting channel; 1121-first sealing member; 1122-second sealing member; 13-first hole; 131-first channel; 14-second hole; 141-second channel; 142-first branch; 12-driving assembly; 121-first space; 122-second space; 123-third space; 15-third hole; 115-connecting pipeline; 151-first pipeline; 152-second pipeline; 153-third pipeline; 16-fourth hole; 161 -Fourth pipeline; 2-First air storage cylinder; 21-First air storage cylinder body; 211-Third channel; 212-Second branch; 132-Third branch; 213-Fourth branch; 22-First end cover; 24-First sealing ring; 25-Second sealing ring; 26-Third sealing ring; 27-First partition; 28-First plug; 3-Second air storage cylinder; 31-Second air storage cylinder body; 311-Fourth channel; 32-Second end cover; 34-Fourth sealing ring; 35-Fifth sealing ring; 36-Sixth sealing ring; 37-Second partition; 38-Second plug. Best Mode for Carrying Out the Invention

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and should not be understood as limiting the present invention.

[0045] In the present invention, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations of the present invention.

[0046] Example 1

[0047] As shown in Figures 1 to 3B , a pneumatic actuator according to one embodiment of the present invention includes an actuator body 1 and at least one air cylinder mounted on the actuator body 1. The specifications of the at least one air cylinder are interchangeable; for example, the at least one air cylinder can have different volumes as needed. In this embodiment, the at least one air cylinder includes a first air cylinder 2 and a second air cylinder 3 mounted on either side of the actuator body 1. The pneumatic actuator of the present invention is capable of converting linear piston motion into rotary motion. Preferably, the pneumatic actuator of the present invention is a geared cylinder or a plug-in cylinder. In this embodiment, the actuator body 1 includes a cylinder body 11 and a drive assembly 12 disposed within the cylinder body 11. The cylinder body 11 is generally hollow and cylindrical. The interior of the cylinder body 11 is configured as a receiving space 111, in which the drive assembly 12 is housed. The drive assembly 12 can employ existing structures in the prior art and will not be described in detail here. The drive assembly 12 divides the receiving space 111 into a first space 121, a second space 122, and a third space 123. The first space 121 is located between the second space 122 and the third space 123. The second space 122, the first space 121, and the third space 123 are arranged along the axial direction of the cylinder body 11. The first air storage cylinder 2 is sealed and disposed at an end of the second space 122 away from the first space 121. The second air storage cylinder 3 is sealed and disposed at an end of the third space 123 away from the first space 121.

[0048] Figures 2 to 5B illustrate the cylinder body of the first embodiment of the pneumatic actuator described above. In this embodiment, a connecting channel 112 is provided on a side wall of the cylinder body 11. This connecting channel 112 extends axially through the side wall of the cylinder body 11. Air can flow in and out of the first and second air reservoirs 2 and 3 through this connecting channel 112. In this embodiment, the connecting channel 112 connects the first and second air reservoirs 2 and 3, and no one-way valve is provided within the connecting channel 112. This ensures unimpeded airflow between the connecting channel 112 and the first and second air reservoirs 2 and 3. Different solenoid valves can be used to change the direction of the pneumatic actuator's safety reset without disassembling or reassembling the pneumatic actuator. For example, air from a source can be directed to the first and second air reservoirs 2 and 3 for storage. The solenoid valve structure (not shown) controls the airflow in and out of the pneumatic actuator, thereby changing the direction of motion of the drive assembly 12. A switching unit (not shown) can also be used to switch between a safety reset mode and a double-acting mode.

[0049] In this embodiment, the connecting channel 112 is a continuous passage. Preferably, the connecting channel 112 is a linear channel. A first hole 13 and a second hole 14 are provided on the outside of the cylinder body 11. Preferably, the first hole 13 and the second hole 14 are arranged on the outside of the cylinder body 11. In this embodiment, the first hole 13 and the second hole 14 are arranged on the outside of the side wall of the cylinder body 11 provided with the connecting channel 112. It is conceivable that the connecting channel 112 and the first hole 13 and the second hole 14 are located on different side walls of the cylinder body 11. The connecting channel 112 and the first hole 13 are connected through the first channel 131, and the connecting channel 112 and the second hole 14 are connected through the second channel 141. Preferably, the first hole 13 and the first channel 131 form an L-shaped straight hole. Also preferably, the second hole 14 and the second channel 141 form a vertical short hole. In addition, a connecting pipeline 115 is opened on the side wall of the cylinder body 11 provided with the connecting channel 112. Optionally, the connecting line 115 and the connecting channel 112 are located on different sidewalls of the cylinder body 11. The connecting line 115 extends axially through the sidewall of the cylinder body 11. Air can flow into and out of the second space 122 and the third space 123 through the connecting line 115. In this embodiment, the connecting line 115 is a linear channel. A first plug 28 and a second plug 38 are provided at each axial end of the connecting line 115 to seal the connecting line 115. A third hole 15 and a fourth hole 16 are also provided on the outer side of the sidewall of the cylinder body 11 where the first hole 13 and the second hole 14 are located. The connecting line 115 and the third hole 15 are connected via a first line 151, the connecting line 115 is connected to the second space 122 via a second line 152, and the connecting line 115 is connected to the third space 123 via a third line 153. The fourth hole 16 is connected to the first space 121 via a fourth line 161.

[0050] A first seal 1121 and a second seal 1122 are respectively provided at the two axial ends of the connecting channel 112 to prevent gas leakage at the adjacent positions of the connecting channel 112 and the first and second gas storage cylinders 2 and 3. Preferably, the first seal 1121 and the second seal 1122 are both sealing rings.

[0051] In this embodiment, the first gas cylinder 2 includes a first gas cylinder body 21, a first partition 27, and a first end cap 22. The first gas cylinder body 21 is generally a hollow cylinder with both ends open. The axial length of the first gas cylinder body 21 along the cylinder body 11 can be adjusted as needed. A third channel 211 is provided at a position on the first gas cylinder body 21 corresponding to the connecting channel 112. The third channel 211 is generally L-shaped and connects to the interior of the first gas cylinder body 21. The first partition 27 is sealingly mounted within the end of the first gas cylinder body 21 adjacent to the cylinder body 11. Preferably, the first partition 27 is partially disposed within the first gas cylinder body 21. A first sealing ring 24 and a second sealing ring 25 are provided on the outside of the first partition 27 to ensure sealing between the first partition 27 and the cylinder body 11 and the first gas cylinder body 21. The first end cap 22 is sealingly mounted on the end of the first gas cylinder body 21 away from the cylinder body 11. Preferably, a third sealing ring 26 is provided between the first end cover 22 and the first gas storage cylinder body 21 .

[0052] The second air cylinder 3 includes a second air cylinder body 31, a second partition 37, and a second end cap 32. The second air cylinder body 31 is generally a hollow cylinder with both ends open. The axial length of the second air cylinder body 31 along the cylinder body 11 can be adjusted as needed. A fourth channel 311 is provided on the second air cylinder body 31 at a position corresponding to the connecting channel 112. The fourth channel 311 is generally L-shaped and connects to the interior of the second air cylinder body 31. The second partition 37 is sealingly mounted within the end of the second air cylinder body 31 adjacent to the cylinder body 11. Preferably, the second partition 37 is partially disposed within the second air cylinder body 31. A fourth sealing ring 34 and a fifth sealing ring 35 are disposed outside the second partition 37 to ensure sealing between the second partition 37 and the cylinder body 11 and the second air cylinder body 31. The second end cap 32 is sealingly mounted on the end of the second air cylinder body 31 facing away from the cylinder body 11. Preferably, a sixth sealing ring 36 is disposed between the second end cap 32 and the second air cylinder body 31. The first end cover 22 and the second end cover 32 may adopt existing structures in the prior art, and will not be described in detail here.

[0053] Example 2

[0054] FIG6 illustrates a cylinder body 11 according to a second embodiment of a pneumatic actuator of the present invention. Referring to FIG1 through FIG3B and FIG6 , this second embodiment differs from the first embodiment in that the connecting channel 112 is a discontinuous passage. Preferably, the connecting channel 112 includes a first connecting channel 1121 and a second connecting channel 1122, wherein the first connecting channel 1121 connects to the first air storage cylinder 2, and the second connecting channel 1122 connects to the second air storage cylinder 3. Neither the first connecting channel 1121 nor the second connecting channel 1122 is provided with a one-way valve, thereby ensuring unimpeded airflow between the first connecting channel 1121 and the first air storage cylinder 2, and unimpeded airflow between the second connecting channel 1122 and the second air storage cylinder 3.

[0055] Example 3

[0056] Figure 7 schematically illustrates a cylinder body 11 of a third embodiment of a pneumatic actuator according to the present invention. Referring to Figures 1 to 3B and Figure 7 , this third embodiment differs from the first embodiment in that the second hole 14 of the cylinder body 11 communicates with the connecting channel 112 via the first air reservoir 2. Specifically, the cylinder body 11 is provided with a first branch 142, which is arranged axially along the cylinder body 11. The second hole 14 communicates with the first branch 142 via a second channel 141. Preferably, the first branch 142 partially penetrates the cylinder body 11 axially; more preferably, the opening of the first branch 142 is located on the side of the cylinder body 11 facing the first air reservoir 2. The first air reservoir body 21 of the first air reservoir 2 is provided with a second branch 212 corresponding to the first branch 142. The second branch 212 communicates with the interior of the first air reservoir body 21. In other words, the first branch 142 communicates with the interior of the first air reservoir body 21 via the second branch 212. In addition, the first gas cylinder body 21 is provided with a third channel 211 corresponding to the connecting channel 112, and the connecting channel 112 is connected to the interior of the first gas cylinder body 21 through the third channel 211. The third channel 211 is generally L-shaped and is connected to the interior of the first gas cylinder body 21.

[0057] It is conceivable that the second hole 14 of the cylinder body 11 can also be connected to the connecting channel 112 through the second air storage cylinder 3. The communication structure between the second hole 14 and the second air storage cylinder 3 is similar to the communication structure between the second hole 14 and the first air storage cylinder 2, and will not be repeated here.

[0058] Example 4

[0059] FIG8 schematically illustrates a fifth embodiment of the pneumatic actuator of the present invention. Referring to FIG1 to FIG3B and FIG8 simultaneously, the fourth embodiment differs from the first embodiment in that: the second hole 14 of the cylinder body 11 is connected to the connecting channel 112 via the first air storage cylinder 2; and the first hole 13 of the cylinder body 11 is connected to the connecting channel 112 via the second air storage cylinder 3. Specifically, the cylinder body 11 is provided with a first branch 142, which is arranged along the axial direction of the cylinder body 11, and the second hole 14 is connected to the first branch 142 via the second channel 141. Preferably, the first branch 142 partially penetrates the cylinder body 11 along the axial direction of the cylinder body 11; more preferably, the opening of the first branch 142 is arranged on the side of the cylinder body 11 facing the first air storage cylinder 2. The first air reservoir body 21 of the first air reservoir 2 is provided with a second branch 212 corresponding to the first branch 142. The second branch 212 communicates with the interior of the first air reservoir body 21. Specifically, the first branch 142 communicates with the interior of the first air reservoir body 21 via the second branch 212. The cylinder body 11 is also provided with a third branch 132, which is arranged axially along the cylinder body 11. The first hole 13 communicates with the third branch 132 via the first passage 131. The third branch 132 partially penetrates the cylinder body 11 axially. More preferably, the opening of the third branch 132 is located on the side of the cylinder body 11 facing the second air reservoir 3. The second air reservoir body 31 of the second air reservoir 3 is provided with a fourth branch 213 corresponding to the third branch 132. The fourth branch 213 communicates with the interior of the second air reservoir body 31. Specifically, the third branch 132 communicates with the interior of the second air reservoir body 31 via the fourth branch 213.

[0060] Furthermore, the first air reservoir body 21 is provided with a third channel 211 corresponding to the connecting channel 112. The connecting channel 112 communicates with the interior of the first air reservoir body 21 via the third channel 211. The third channel 211 is generally L-shaped and communicates with the interior of the first air reservoir body 21. The second air reservoir body 31 is provided with a fourth channel 311 corresponding to the connecting channel 112. The connecting channel 112 communicates with the interior of the second air reservoir body 31 via the fourth channel 311. The fourth channel 311 is generally L-shaped and communicates with the interior of the second air reservoir body 31.

[0061] Example 5

[0062] Figure 9 shows a pneumatic actuator according to another embodiment of the present invention, which includes an actuator body 1 and at least one air storage cylinder arranged on the actuator body 1. In this embodiment, the at least one air storage cylinder includes a first air storage cylinder 2 installed on one side of the actuator body 1. In other words, the pneumatic actuator in this embodiment is provided with an air storage cylinder only on one side. Preferably, the pneumatic actuator of the present invention is a gear-type cylinder or a plug-in cylinder. The actuator body 1 includes a cylinder body 11 and a drive assembly arranged in the cylinder body 11. The cylinder body 11 is roughly in the shape of a hollow column. The interior of the cylinder body 11 is provided as a receiving space 111, and the drive assembly is accommodated in the receiving space 111.

[0063] Figure 10 schematically shows a fifth embodiment of the pneumatic actuator of the present invention. A connecting channel 112 is provided on one side wall of the cylinder body 11, and the connecting channel 112 at least partially penetrates the side wall of the cylinder body 11 along the axial direction of the cylinder body 11. Preferably, the opening of the connecting channel 112 is provided on the side of the cylinder body 11 facing the first air storage cylinder 2. Also preferably, the connecting channel 112 penetrates the side wall of the cylinder body 11 along the axial direction of the cylinder body 11. Air flow can enter and exit the first air storage cylinder 2 through the connecting channel 112. In this embodiment, no one-way valve is provided in the connecting channel 112, thereby allowing unimpeded air flow between the connecting channel 112 and the first air storage cylinder 2, and enabling the use of different solenoid valves to achieve the purpose of changing the direction of the pneumatic actuator's safe return without disassembling and reassembling the pneumatic actuator. For example, the air flow from the air source can be introduced into the first air storage cylinder 2 to store air, and the direction of the air flow in and out of the pneumatic actuator can be changed by controlling the solenoid valve structure (not shown) to change the movement direction of the drive component, and the safety return mode and the double-acting mode can be switched by operating the switching part (not shown).

[0064] In this embodiment, the connecting channel 112 is a linear channel. A first hole 13 and a second hole 14 are provided on the outer side of the cylinder body 11. The connecting channel 112 and the first hole 13 are connected through a first channel 131, and the connecting channel 112 and the second hole 14 are connected through a second channel 141.

[0065] In this embodiment, the first gas cylinder 2 includes a first gas cylinder body 21, a first partition, and a first end cap. The first gas cylinder body 21 is generally a hollow cylinder with two open ends. A third passage 211 is provided in the first gas cylinder body 21 at a location corresponding to the connection passage 112. The third passage 211 is generally L-shaped and connects to the interior of the first gas cylinder body 21.

[0066] Example 6

[0067] Figure 11 schematically illustrates a sixth embodiment of a pneumatic actuator according to the present invention. This sixth embodiment differs from the fifth embodiment in that the second hole 14 of the cylinder body 11 communicates with the connecting channel 112 via the first air reservoir 2. Specifically, the cylinder body 11 is provided with a first branch 142, which is arranged axially along the cylinder body 11. The second hole 14 communicates with the first branch 142 via a second channel 141. Preferably, the first branch 142 partially penetrates the cylinder body 11 axially; more preferably, the opening of the first branch 142 is located on the side of the cylinder body 11 facing the first air reservoir 2. The first air reservoir body 21 of the first air reservoir 2 is provided with a second branch 212 corresponding to the first branch 142. The second branch 212 communicates with the interior of the first air reservoir body 21. In other words, the first branch 142 communicates with the interior of the first air reservoir body 21 via the second branch 212. In addition, the first gas cylinder body 21 is provided with a third channel 211 corresponding to the connecting channel 112, and the connecting channel 112 is connected to the interior of the first gas cylinder body 21 through the third channel 211. The third channel 211 is generally L-shaped and is connected to the interior of the first gas cylinder body 21.

[0068] Example 7

[0069] Figure 12 schematically illustrates a seventh embodiment of a pneumatic actuator according to the present invention. This seventh embodiment differs from the fifth embodiment in that the second hole 14 of the cylinder body 11 communicates with the connecting channel 112 via the first air reservoir 2. Specifically, the cylinder body 11 is provided with a first branch 142, which is arranged axially along the cylinder body 11. The second hole 14 communicates with the first branch 142 via a second channel 141. Preferably, the first branch 142 extends axially through the cylinder body 11. The first air reservoir body 21 of the first air reservoir 2 is provided with a second branch 212 corresponding to the first branch 142. The second branch 212 communicates with the interior of the first air reservoir body 21. In other words, the first branch 142 communicates with the interior of the first air reservoir body 21 via the second branch 212. Furthermore, the first air reservoir body 21 is provided with a third channel 211 corresponding to the connecting channel 112. The connecting channel 112 communicates with the interior of the first air reservoir body 21 via the third channel 211. The third channel 211 is substantially L-shaped and communicates with the interior of the first air storage cylinder body 21 .

[0070] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A pneumatic actuator capable of converting linear piston motion into rotary motion, comprising: An actuator body, comprising a cylinder and a drive assembly disposed in the cylinder; as well as at least one gas storage cylinder mounted on the cylinder body; It is characterized in that a connecting channel is provided on one side wall of the cylinder body, the connecting channel is connected to the internal space of the at least one gas storage cylinder, a first hole and a second hole are provided on the outer side of the cylinder body, the connecting channel is connected to the first hole and the second hole, and the air flow can directly and unimpededly enter and exit the at least one gas storage cylinder through the connecting channel.

2. The pneumatic actuator according to claim 1, characterized in that: The specifications of the at least one gas storage cylinder are replaceable.

3. The pneumatic actuator according to claim 1, characterized in that The connecting channel is a continuous passage.

4. The pneumatic actuator according to claim 1, characterized in that: The connecting channel and the first hole are communicated through a first channel; the connecting channel and the second hole are communicated through a second channel.

5. The pneumatic actuator according to claim 1, characterized in that: The at least one gas storage cylinder is provided with a third channel at a position corresponding to the connecting channel, which is connected to the inner space of the at least one gas storage cylinder.

6. The pneumatic actuator according to claim 5, characterized in that: The third channel is L-shaped.

7. The pneumatic actuator according to claim 1, characterized in that: The at least one air storage cylinder includes a first air storage cylinder and a second air storage cylinder respectively installed on both sides of the actuator body; a third channel is provided at a position of the first air storage cylinder corresponding to the connecting channel, which is connected to the internal space of the first air storage cylinder; a fourth channel is provided at a position of the second air storage cylinder corresponding to the connecting channel, which is connected to the interior of the second air storage cylinder.

8. The pneumatic actuator according to claim 7, characterized in that: The fourth channel is L-shaped.

9. The pneumatic actuator according to claim 7, characterized in that: The connecting channel is a discontinuous passage, and includes a first connecting channel and a second connecting channel, wherein the first connecting channel is connected to the first gas storage cylinder, and the second connecting channel is connected to the second gas storage cylinder.

10. The pneumatic actuator according to claim 1, characterized in that: The connecting channel and the first hole are communicated through the first channel; the connecting channel and the second hole are communicated through the at least one gas storage cylinder.

11. The pneumatic actuator according to claim 10, characterized in that: The cylinder body is provided with a first branch, which is arranged along the axial direction of the cylinder body. The second hole is connected to the first branch through a second channel. The at least one air storage cylinder is provided with a second branch corresponding to the first branch, and the second branch is connected to the internal space of the at least one air storage cylinder. The at least one air storage cylinder is provided with a third channel corresponding to the connecting channel, and the connecting channel is connected to the internal space of the at least one air storage cylinder through the third channel.

12. The pneumatic actuator according to claim 1, characterized in that The at least one air storage cylinder is a first air storage cylinder provided on one side of the actuator body.

13. The pneumatic actuator according to claim 12, characterized in that: A connecting channel is provided on one side wall of the cylinder body, and the connecting channel at least partially penetrates the side wall of the cylinder body along the axial direction of the cylinder body; an opening of the connecting channel is provided on a side of the cylinder body facing the first air storage cylinder.

14. The pneumatic actuator according to claim 13, characterized in that: The connecting channel and the first hole are communicated through a first channel, and the connecting channel and the second hole are communicated through a second channel.

15. The pneumatic actuator according to claim 14, characterized in that: A third channel is provided at a position of the first gas storage cylinder corresponding to the connecting channel, and the third channel is connected to the inner space of the first gas storage cylinder.

16. The pneumatic actuator according to claim 13, characterized in that: The connecting channel and the first hole are communicated with each other through the first channel, and the second hole is communicated with the connecting channel through the first air storage cylinder.

17. The pneumatic actuator according to claim 16, characterized in that: The cylinder body is provided with a first branch, which is arranged along the axial direction of the cylinder body. The second hole is connected to the first branch through a second channel. The first air storage cylinder is provided with a second branch corresponding to the first branch, and the second branch is connected to the internal space of the first air storage cylinder. The first air storage cylinder is provided with a third channel corresponding to the connecting channel, and the connecting channel is connected to the internal space of the first air storage cylinder through the third channel.

18. The pneumatic actuator according to claim 17, characterized in that: The first branch passage partially penetrates the cylinder body in the axial direction of the cylinder body.

19. The pneumatic actuator according to claim 1, characterized in that It is a gear cylinder or a plug-in cylinder.

20. The pneumatic actuator according to claim 1, characterized in that A connecting pipe is provided on the side wall of the cylinder body; a third hole and a fourth hole are provided on the outer side of the cylinder body provided with the first hole and the second hole; the connecting pipe is connected to the third hole, and air flow can enter and exit the second space and the third space of the pneumatic actuator from the connecting pipe; the fourth hole is connected to the first space of the pneumatic actuator.

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