CN217683493U - High-precision pneumatic actuating mechanism - Google Patents

Abstract

The utility model discloses a high-precision pneumatic actuating mechanism, which comprises a mounting plate; the bottom surface of the mounting plate is fixedly provided with a packaging shell; a rotary cylinder is fixedly arranged on the top surface of the mounting plate, and an output shaft of the rotary cylinder is fixedly sleeved with a driving gear; the bottom surface of the packaging shell is provided with a valve rod connecting assembly, and the top end of the valve rod connecting assembly is sleeved with a driven gear; a coarse adjustment transmission component and a fine adjustment transmission component are arranged in the packaging shell; a first telescopic cylinder and a second telescopic cylinder are arranged in the packaging shell; the rotary cylinder is provided with a controller. The utility model discloses a pneumatic actuator can quick response, but accurate fine setting again.

Description

High-precision pneumatic actuating mechanism

Technical Field

The utility model relates to a drive technical field especially relates to a high accuracy pneumatic actuator.

Background

The pneumatic actuator is an actuator for opening and closing or adjusting a valve by air pressure, and is also called as a pneumatic actuator or a pneumatic device, the pneumatic actuator generally comprises an air cylinder for providing driving force and a connecting sleeve, one side of the connecting sleeve is fixedly connected with a cylinder body of the air cylinder, the other side of the connecting sleeve is used for being connected with the valve, and an output rod of the air cylinder is positioned in the connecting sleeve and is connected with a valve rod of the valve through a connecting piece. When the pneumatic actuating mechanism controls the valve, the control precision can not be ensured in order to achieve the purpose of quick response.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings or drawbacks of the prior art, it is desirable to provide a high precision pneumatic actuator that is both fast in response and fine-tuned.

The utility model provides a high-precision pneumatic actuating mechanism, which comprises a mounting plate; the bottom surface of the mounting plate is fixedly provided with a packaging shell; a rotary cylinder is fixedly arranged on the top surface of the mounting plate, an output shaft of the rotary cylinder penetrates through the mounting plate and extends into the packaging shell, and a driving gear is fixedly sleeved on the output shaft; a valve rod connecting assembly is arranged on the bottom surface of the packaging shell, and the top end of the valve rod connecting assembly extends into the packaging shell and is fixedly sleeved with a driven gear; a coarse adjustment transmission assembly is arranged on one side of the packaging shell, which is positioned on the driving gear and the driven gear, and a fine adjustment transmission assembly is arranged on the other side of the packaging shell; a first telescopic cylinder is arranged in the packaging shell and used for driving the coarse adjustment transmission assembly to be meshed with or separated from the driving gear and the driven gear; a second telescopic cylinder is arranged in the packaging shell and used for driving the fine adjustment transmission assembly to be meshed with or separated from the driving gear and the driven gear; and the rotary cylinder is provided with a controller for controlling the driving of the rotary cylinder, the first telescopic cylinder and the second telescopic cylinder.

Further, the rough adjustment transmission assembly comprises a first shaft lever and two first track plates distributed up and down, one end of each of the two first track plates is fixedly connected with the inner wall of the packaging shell, the other end of each of the two first track plates extends to a position between the driving gear and the driven gear, a first track groove is formed in the first track plate in a direction close to or far away from the driving gear and the driven gear, the first shaft lever penetrates through the two first track grooves in the vertical direction, a first upper limiting plate is fixedly sleeved on the first shaft lever above the two first track plates, a first lower limiting plate is fixedly sleeved on the first shaft lever below the two first track plates, a first bearing is sleeved on the first shaft lever, a first rough adjustment gear is fixedly sleeved on the top end of the first shaft lever, the first rough adjustment gear and the driving gear are located in the same horizontal plane, a second rough adjustment gear is fixedly sleeved on the bottom end of the first shaft lever, the second rough adjustment gear and the driven gear are located in the same horizontal plane, a third rough adjustment gear meshed with the driving gear is arranged between the first rough adjustment gear, and the rough adjustment gear is larger than the third rough adjustment gear, and the rough adjustment radius of the third driving gear is larger than the third rough adjustment radius of the third gear; the first telescopic cylinder is fixedly arranged between the two first track plates, and a piston rod of the first telescopic cylinder is fixedly connected with the side wall of the first bearing.

Furthermore, the fine adjustment transmission assembly comprises a second shaft lever and two second track plates distributed up and down, one end of each of the two second track plates is fixedly connected with the inner wall of the packaging shell, the other end of each of the two second track plates extends to a position between the driving gear and the driven gear, a second track groove is formed in the second track plate in a direction close to or far away from the driving gear and the driven gear, the second shaft lever penetrates through the two second track grooves in the vertical direction, a second upper limiting plate is fixedly sleeved on the second shaft lever above the two second track plates, a second lower limiting plate is fixedly sleeved on the second shaft lever below the two second track plates, a second bearing is sleeved on the second shaft lever between the two second track plates, a first fine adjustment gear is fixedly sleeved on the top end of the second shaft lever, the first fine adjustment gear and the driving gear are located in the same horizontal plane, a second fine adjustment gear is fixedly sleeved on the bottom end of the second shaft lever, the second fine adjustment gear and the driven gear are located in the same horizontal plane, the radius of the driving gear is smaller than that of the first fine adjustment gear, and the radius of the driven gear is smaller than that of the driven gear; the second telescopic cylinder is fixedly arranged between the two second track plates, and a piston rod of the second telescopic cylinder is fixedly connected with the side wall of the second bearing.

Further, the valve rod coupling assembling includes the butt joint post, the valve rod butt joint groove has been seted up to the bottom of butt joint post, what the bottom surface of encapsulation casing was fed through is provided with the butt joint sleeve, the butt joint post pass through the third bearing rotate set up in the butt joint sleeve, the coaxial fixedly connected with third axostylus axostyle in top of butt joint post, driven gear is fixed cup joint in on the third axostylus axostyle.

Furthermore, fixed mounting components are symmetrically arranged on two sides of the packaging shell; the fixed mounting assembly comprises symmetrical L-shaped mounting rods fixedly connected to two sides of the packaging shell, and the bottom ends of the mounting rods are fixedly connected with hoops.

Further, a first reinforcing plate is arranged between the two first track plates, and a first reinforcing piece is arranged between the first track plates and the inner wall of the packaging shell; and a second reinforcing plate is arranged between the two second track plates, and a second reinforcing piece is arranged between the second track plates and the inner wall of the packaging shell.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a pneumatic actuator is provided with coarse adjustment drive assembly and fine adjustment drive assembly, and through the driving action of first telescopic cylinder and the flexible cylinder of second, can realize the transmission between driving gear and the driven gear and switch. When the valve is controlled to be opened and closed quickly, the first telescopic cylinder drives the coarse adjustment transmission assembly to be meshed with the driving gear and the driven gear, and the second telescopic cylinder drives the fine adjustment transmission assembly to be separated from the driving gear and the driven gear, so that quick response of valve control can be realized; when the valve needs to keep set flow or pressure, the driving gear and the driven gear are driven through the fine adjustment transmission assembly, when flowing media fluctuate, the valve can be precisely adjusted, and the constant flow or pressure of the media is ensured. The performance of the pneumatic actuating mechanism is greatly improved.

It should be understood that what is described in this summary section is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a high-precision pneumatic actuator;

fig. 2 is a schematic diagram of the internal structure of the package housing.

Reference numbers in the figures: 10. mounting a plate; 11. a package housing; 12. a rotating cylinder; 13. a valve stem connection assembly; 14. a coarse drive assembly; 15. finely adjusting the transmission component; 16. a first telescopic cylinder; 17. a second telescopic cylinder; 18. a controller; 19. fixing the mounting assembly;

21. an output shaft; 22. a driving gear;

31. a driven gear; 32. butting the columns; 33. butting the sleeves; 34. a third bearing; 35. a third shaft lever;

41. a first shaft lever; 42. a first track plate; 43. a first track groove; 44. a first upper limiting plate; 45. a first lower limiting plate; 46. a first bearing; 47. a first coarse adjustment gear; 48. a second coarse adjustment gear; 49. a third coarse adjustment gear; 410. a first reinforcing plate; 411 a first stiffener;

51. a second shaft lever; 52. a second track plate; 53. a second track groove; 54. a second upper limiting plate; 55. a second lower limiting plate; 56. a second bearing; 57. a first fine adjustment gear; 58. a second fine adjustment gear; 59. a second reinforcing plate; 510 a second stiffener;

91. mounting a rod; 92. and (5) hooping.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 2, an embodiment of the present invention provides a high-precision pneumatic actuator, including a mounting plate 10; a packaging shell 11 is fixedly arranged on the bottom surface of the mounting plate 10; a rotary cylinder 12 is fixedly arranged on the top surface of the mounting plate 10, an output shaft 21 of the rotary cylinder 12 penetrates through the mounting plate 10 and extends into the packaging shell 11, and a driving gear 22 is fixedly sleeved on the output shaft 21; a valve rod connecting assembly 13 is arranged on the bottom surface of the packaging shell 11, and the top end of the valve rod connecting assembly 13 extends into the packaging shell 11 and is fixedly sleeved with a driven gear 31; a coarse adjustment transmission assembly 14 is arranged on one side of the driving gear 22 and the driven gear 31 in the packaging shell 11, and a fine adjustment transmission assembly 15 is arranged on the other side; a first telescopic cylinder 16 is arranged in the packaging shell 11 and used for driving the coarse adjustment transmission assembly 14 to be meshed with or separated from the driving gear 22 and the driven gear 31; a second telescopic cylinder 17 is arranged in the packaging shell 11 and is used for driving the fine adjustment transmission assembly 15 to be meshed with or separated from the driving gear 22 and the driven gear 31; the rotary cylinder 12 is provided with a controller 18 for controlling the driving of the rotary cylinder 12, the first telescopic cylinder 16 and the second telescopic cylinder 17.

In this embodiment, the valve rod connecting assembly 13 is connected with the valve rod of the valve, and the driving gear 22 drives the driven gear 31 to rotate through the transmission structure, so as to drive the valve rod of the valve to rotate, thereby realizing the control of the valve. When the valve is controlled to be opened and closed quickly, the driving gear 22 and the driven gear 31 are driven through the rough adjusting transmission assembly 14; when the valve is precisely and finely controlled, the driving gear 22 and the driven gear 31 are driven by the fine adjustment transmission assembly 15. The pneumatic actuator controls the valve, can meet the requirement for quick response, can perform accurate fine adjustment, and greatly improves the performance of the pneumatic actuator.

In a preferred embodiment, as shown in fig. 1 and fig. 2, the coarse adjustment transmission assembly 14 includes a first shaft 41 and two first track plates 42 distributed up and down, one end of each of the two first track plates 42 is fixedly connected to the inner wall of the enclosure 11, and the other end extends between the driving gear 22 and the driven gear 31, a first track groove 43 is formed in the first track plate 42 in a direction close to or away from the driving gear 22 and the driven gear 31, the first shaft 41 vertically passes through the two first track grooves 43, a first upper limiting plate 44 is fixedly sleeved on the first shaft 41 above the two first track plates 42, a first lower limiting plate 45 is fixedly sleeved on the first shaft 41 below the two first track plates 42, a first bearing 46 is sleeved on the first shaft 41 between the two first track plates 42, a first coarse adjustment gear 47 is fixedly sleeved on the top end of the first shaft 41, the first coarse adjustment gear 47 and the driving gear 22 are located in the same horizontal plane, a second coarse adjustment gear 48 is fixedly sleeved on the bottom end of the first shaft 41, a second shaft 48 and the driven gear 31 are located in the same horizontal plane, a coarse adjustment gear 47 is fixedly sleeved on the top end of the first shaft 41, a coarse adjustment gear 47 and a third coarse adjustment gear 49, a coarse adjustment radius of the driving gear 49 is larger than a third coarse adjustment radius of the driving gear 49 of the driving gear 22, and a third coarse adjustment gear 49 of the driving gear 49, and a third driving gear 49 of the driving gear 49; the first telescopic cylinder 16 is fixedly disposed between the two first track plates 42, and a piston rod of the first telescopic cylinder 16 is fixedly connected to a side wall of the first bearing 46.

In this embodiment, when the valve is controlled to be opened and closed rapidly, the driving gear 22 and the driven gear 31 are driven by the coarse adjustment transmission assembly 14. The controller 18 controls the first telescopic cylinder 16 to extend, so as to push the first shaft rod 41 to slide along the first track groove 43, the first rough adjusting gear 47 is meshed with the driving gear 22 through the third rough adjusting gear 49, and the second rough adjusting gear 48 is meshed with the driven gear 31. The multi-stage speed-increasing transmission is realized, so that the valve is controlled to be opened and closed quickly.

In a preferred embodiment, as shown in fig. 1 and fig. 2, the fine adjustment transmission assembly 15 includes a second shaft rod 51 and two second track plates 52 distributed up and down, one end of each of the two second track plates 52 is fixedly connected to an inner wall of the package housing 11, and the other end extends to a position between the driving gear 22 and the driven gear 31, a second track groove 53 is formed in the second track plate 52 along a direction close to or away from the driving gear 22 and the driven gear 31, the second shaft rod 51 passes through the two second track grooves 53 along a vertical direction, a second upper limiting plate 54 is fixedly sleeved on the second shaft rod 51 above the two second track plates 52, a second lower limiting plate 55 is fixedly sleeved on the second shaft rod 51 below the two second track plates 52, a second bearing 56 is sleeved on the second shaft rod 51 between the two second track plates 52, a first fine adjustment gear 57 is fixedly sleeved on a top end of the second shaft rod 51, the first fine adjustment gear 57 and the driving gear 22 are located in a same horizontal plane, a second fine adjustment gear 58 is fixedly sleeved on a bottom end of the second shaft rod 51, the second fine adjustment gear 58 and the second fine adjustment gear 31 is located in a same horizontal plane, and a radius of the driven gear 31 is smaller than a radius of the second driven gear 31, and a radius of the second fine adjustment gear 31 is smaller than a radius of the second fine adjustment gear 31; the second telescopic cylinder 17 is fixedly arranged between the two second track plates 52, and a piston rod of the second telescopic cylinder 17 is fixedly connected with a side wall of the second bearing 56.

In the present embodiment, when the precise fine control of the valve is performed, the driving gear 22 and the driven gear 31 are driven by the fine adjustment transmission assembly 15. The controller 18 controls the second telescopic cylinder 17 to extend, so that the second shaft rod 51 is pushed to slide along the second track groove 53, the first fine adjustment gear 57 is meshed with the driving gear 22, and the second fine adjustment gear 58 is meshed with the driven gear 31. The multistage speed reduction transmission is realized, so that the valve is controlled to be accurately and finely adjusted.

In a preferred embodiment, as shown in fig. 1 and 2, the valve rod connecting assembly 13 includes a docking post 32, a valve rod docking groove is opened at a bottom end of the docking post 32, a docking sleeve 33 is disposed in communication with a bottom surface of the packaging housing 11, the docking post 32 is rotatably disposed in the docking sleeve 33 through a third bearing 34, a third shaft 35 is fixedly connected to a top end of the docking post 32 coaxially, and the driven gear 31 is fixedly sleeved on the third shaft 35.

In this embodiment, the docking sleeve 33 is sleeved on the valve, and the valve rod docking slot is sleeved on the top end of the valve rod in a matching manner. The top end of the valve rod is mostly in a regular quadrangle shape, and also has a regular hexagon shape, a regular triangle shape or a quincunx shape. The valve rod butt joint groove is matched with the valve rod butt joint groove, and the valve rod is driven to rotate through the rotation of the butt joint column 32. The pneumatic actuating mechanism is connected with the valve and is installed quickly and conveniently.

In a preferred embodiment, as shown in fig. 1, the two sides of the package housing 11 are symmetrically provided with fixed mounting components 19; the fixed mounting assembly 19 includes L-shaped mounting rods 91 symmetrically and fixedly connected to two sides of the package housing 11, and the bottom ends of the mounting rods 91 are fixedly connected with hoops 92. The anchor ears 92 are fixedly installed on the pipelines at the two ends of the valve, so as to fixedly install the packaging shell 11.

In a preferred embodiment, as shown in fig. 2, a first reinforcing plate 410 is disposed between the two first rail plates 42, and a first reinforcing member 411 is disposed between the first rail plates 42 and the inner wall of the package housing 11; a second reinforcing plate 59 is disposed between the two second rail plates 52, and a second reinforcing member 510 is disposed between the second rail plates 52 and the inner wall of the package housing 11. The structural strength of the coarse and fine drive assemblies 14, 15 is increased.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (6)

1. A high-precision pneumatic actuator is characterized by comprising an installation plate; the bottom surface of the mounting plate is fixedly provided with a packaging shell; a rotary cylinder is fixedly arranged on the top surface of the mounting plate, an output shaft of the rotary cylinder penetrates through the mounting plate and extends into the packaging shell, and a driving gear is fixedly sleeved on the output shaft; the bottom surface of the packaging shell is provided with a valve rod connecting assembly, and the top end of the valve rod connecting assembly extends into the packaging shell and is fixedly sleeved with a driven gear; a coarse adjustment transmission assembly is arranged on one side of the packaging shell, which is positioned on the driving gear and the driven gear, and a fine adjustment transmission assembly is arranged on the other side of the packaging shell; a first telescopic cylinder is arranged in the packaging shell and used for driving the coarse adjustment transmission assembly to be meshed with or separated from the driving gear and the driven gear; a second telescopic cylinder is arranged in the packaging shell and used for driving the fine adjustment transmission assembly to be meshed with or separated from the driving gear and the driven gear; and the rotary cylinder is provided with a controller for controlling the driving of the rotary cylinder, the first telescopic cylinder and the second telescopic cylinder.

2. The high-precision pneumatic actuator according to claim 1, wherein the coarse adjustment transmission assembly includes a first shaft rod and two first track plates distributed up and down, one end of each of the two first track plates is fixedly connected to an inner wall of the package housing, and the other end of each of the two first track plates extends between the driving gear and the driven gear, a first track groove is formed in each of the first track plates in a direction close to or away from the driving gear and the driven gear, the first shaft rod penetrates through the two first track grooves in a vertical direction, a first upper limiting plate is fixedly sleeved on the first shaft rod above the two first track plates, a first lower limiting plate is fixedly sleeved on the first shaft rod below the two first track plates, a first bearing is sleeved on the first shaft rod between the two first track plates, a first coarse adjustment gear is connected to a top end of the first shaft rod, the first coarse adjustment gear and the driving gear are located in a same horizontal plane, a second coarse adjustment gear is connected to a bottom end of the first shaft rod, the second coarse adjustment gear and the driven gear are located in a same horizontal plane, a first coarse adjustment gear and a third coarse adjustment gear is arranged between the first shaft rod and the driven gear, a third coarse adjustment gear is larger than a third driving gear, and a third driving gear is meshed with the driving gear; the first telescopic cylinder is fixedly arranged between the two first track plates, and a piston rod of the first telescopic cylinder is fixedly connected with the side wall of the first bearing.

3. The high-precision pneumatic actuator according to claim 2, wherein the fine adjustment transmission assembly comprises a second shaft rod and two second track plates distributed up and down, one end of each of the two second track plates is fixedly connected with the inner wall of the packaging shell, the other end of each of the two second track plates extends between the driving gear and the driven gear, a second track groove is formed in the second track plate in a direction close to or away from the driving gear and the driven gear, the second shaft rod penetrates through the two second track grooves in the vertical direction, a second upper limiting plate is fixedly sleeved on the second shaft rod above the two second track plates, a second lower limiting plate is fixedly sleeved on the second shaft rod below the two second track plates, a second bearing is sleeved on the second shaft rod between the two second track plates, a first fine adjustment gear is fixedly sleeved on the top end of the second shaft rod, the first fine adjustment gear and the driving gear are located in the same horizontal plane, a second fine adjustment gear is fixedly sleeved on the bottom end of the second shaft rod, the second fine adjustment gear and the driven gear are located in the same horizontal plane, the radius of the second fine adjustment gear is smaller than the radius of the first fine adjustment gear, and the driven gear is smaller than the radius of the second adjustment gear; the second telescopic cylinder is fixedly arranged between the two second track plates, and a piston rod of the second telescopic cylinder is fixedly connected with the side wall of the second bearing.

4. The high-precision pneumatic actuator according to claim 3, wherein the valve rod connecting assembly comprises a butt joint column, a valve rod butt joint groove is formed in the bottom end of the butt joint column, a butt joint sleeve is arranged on the bottom surface of the packaging shell in a communicating mode, the butt joint column is rotatably arranged in the butt joint sleeve through a third bearing, a third shaft rod is fixedly connected to the top end of the butt joint column coaxially, and the driven gear is fixedly sleeved on the third shaft rod.

5. The high-precision pneumatic actuator according to claim 4, wherein the fixed mounting components are symmetrically arranged on two sides of the packaging shell; the fixed mounting assembly comprises symmetrical L-shaped mounting rods fixedly connected to two sides of the packaging shell, and the bottom ends of the mounting rods are fixedly connected with hoops.

6. The high-precision pneumatic actuator according to claim 5, wherein a first reinforcing plate is arranged between the two first track plates, and a first reinforcing member is arranged between the first track plates and the inner wall of the packaging shell; and a second reinforcing plate is arranged between the two second track plates, and a second reinforcing piece is arranged between the second track plates and the inner wall of the packaging shell.

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