Transmission structure of electric actuator

Abstract

The transmission structure of the electric actuator comprises a shell and a shell cover, a mounting plate is fixed in the shell through screws, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft and a fifth rotating shaft are rotationally connected to the mounting plate in a sleeved mode, a second gear and a third gear are fixedly connected to the first rotating shaft in a sleeved mode, and a third gear and a fourth gear are fixedly connected to the fifth rotating shaft in a sleeved mode. The second rotating shaft is fixedly sleeved with a fourth gear and a fifth gear, the third rotating shaft is fixedly sleeved with a sixth gear and a seventh gear, the fourth rotating shaft is fixedly sleeved with an eighth gear and a ninth gear, and the fifth rotating shaft is fixedly sleeved with a tenth gear. Automatic adjustment and manual adjustment can be achieved, it is ensured that manual adjustment can still be achieved when the servo motor breaks down, double insurance is achieved, and stability is good; through five-stage speed reduction adjustment, higher adjustment precision can be achieved, the torque borne by the servo motor is small, the service life is longer, and the stability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to a transmission structure of an electric actuator. Background Art

[0002] The transmission structure of the electric actuator is one of its core components, which is mainly responsible for converting the rotational motion of the motor into the linear or rotational displacement required by the actuator to achieve precise control of valves, gates and other equipment. The transmission structure of the electric actuator is usually composed of multiple key components, including motors, reducers, transmission devices and position control mechanisms. At present, the reducer of the electric actuator mainly adopts worm gear transmission. However, we know that although the worm gear transmission has the advantages of compact structure, large transmission ratio and smooth transmission, its transmission process has the disadvantages of high heat generation, high production cost and severe wear. In order to better solve this problem, we propose a transmission structure of an electric actuator. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a transmission structure of an electric actuator.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A transmission structure of an electric actuator comprises a shell and a shell cover, a mounting plate is fixed inside the shell by screws, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, and a fifth rotating shaft are rotatably sleeved on the mounting plate, a second gear and a third gear are fixedly sleeved on the first rotating shaft, a fourth gear and a fifth gear are fixedly sleeved on the second rotating shaft, a sixth gear and a seventh gear are fixedly sleeved on the third rotating shaft, an eighth gear and a ninth gear are fixedly sleeved on the fourth rotating shaft, a tenth gear is fixedly sleeved on the fifth rotating shaft, a servo motor is mounted on the mounting plate, a first gear is fixedly sleeved on the output shaft of the servo motor, the first gear is meshed with the second gear for transmission, the third gear is meshed with the fourth gear for transmission, the fifth gear is meshed with the sixth gear for transmission, the seventh gear is meshed with the eighth gear for transmission, the ninth gear is meshed with the tenth gear for transmission, and the fifth rotating shaft is fixedly connected to a transmission shaft.

[0006] Preferably, the shell and the shell cover are fixedly connected by screws, and a connecting seat for connecting with the valve body is fixed on the bottom of the shell.

[0007] Preferably, the transmission shaft passes through the connecting seat, the transmission shaft is used to be fixedly connected to the valve stem of the valve body, and a spline groove is provided at the bottom end of the transmission shaft.

[0008] Preferably, the fifth rotating shaft is fixedly sleeved with a first connecting shaft, the first connecting shaft passes through the shell cover and is fixed with a pointer, and a scale ring for indicating the rotation angle of the pointer is installed on the shell cover.

[0009] Preferably, a sixth rotating shaft is rotatably sleeved on the mounting plate, an eleventh gear is fixedly sleeved on the sixth rotating shaft, the eleventh gear is meshed with the sixth gear for transmission, the sixth rotating shaft is fixedly connected to a second connecting shaft, the second connecting shaft passes through the shell cover, and a hexagonal groove is provided at the top end of the second connecting shaft.

[0010] Preferably, the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft, the fifth rotating shaft and the sixth rotating shaft are respectively rotatably connected to the mounting plate via bearings.

[0011] Preferably, the diameter of the first gear is smaller than the diameter of the second gear, the diameter of the third gear is smaller than the diameter of the fourth gear, the diameter of the fifth gear is smaller than the diameter of the sixth gear, the diameter of the seventh gear is smaller than the diameter of the eighth gear, the diameter of the ninth gear is smaller than the diameter of the tenth gear, and the diameter of the eleventh gear is smaller than the diameter of the sixth gear.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, automatic adjustment and manual adjustment can be realized, ensuring that manual adjustment can still be performed when the servo motor fails, realizing double insurance and good stability; through five-stage deceleration adjustment, higher adjustment accuracy can be achieved, the servo motor carries less torque, has a longer service life and better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a first axonometric diagram of a transmission structure of an electric actuator proposed by the utility model;

[0015] Figure 2 A second isometric view of a transmission structure of an electric actuator proposed in the utility model;

[0016] Figure 3 A first isometric view of a mounting plate of a transmission structure of an electric actuator proposed in the utility model;

[0017] Figure 4 This is a second isometric view of a mounting plate of a transmission structure of an electric actuator proposed in the utility model.

[0018] In the figure: 1 housing, 2 housing cover, 3 first connecting shaft, 4 scale ring, 5 hexagonal groove, 6 second connecting shaft, 7 pointer, 8 connecting seat, 9 transmission shaft, 10 mounting plate, 11 servo motor, 12 fifth rotating shaft, 13 tenth gear, 14 second rotating shaft, 15 first rotating shaft, 16 first gear, 17 second gear, 18 third gear, 19 fifth gear, 20 fourth gear, 21 seventh gear, 22 sixth gear, 23 eleventh gear, 24 sixth rotating shaft, 25 eighth gear, 26 ninth gear, 27 fourth rotating shaft, 28 third rotating shaft, 29 spline groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4A transmission structure of an electric actuator includes a housing 1 and a housing cover 2. A mounting plate 10 is fixed inside the housing 1 by screws. A first rotating shaft 15, a second rotating shaft 14, a third rotating shaft 28, a fourth rotating shaft 27, and a fifth rotating shaft 12 are rotatably sleeved on the mounting plate 10. A second gear 17 and a third gear 18 are fixedly sleeved on the first rotating shaft 15. A fourth gear 20 and a fifth gear 19 are fixedly sleeved on the second rotating shaft 14. A sixth gear 22 and a seventh gear 21 are fixedly sleeved on the third rotating shaft 28. An eighth gear 25 and a ninth gear 26 are fixedly sleeved on the fourth rotating shaft 27. A tenth gear 13 is fixedly sleeved on the fifth rotating shaft 12. A servo motor 11 is installed on the mounting plate 10. The servo motor 11 The output shaft is fixedly sleeved with a first gear 16, the first gear 16 is meshed with the second gear 17 for transmission, the third gear 18 is meshed with the fourth gear 20 for transmission, the fifth gear 19 is meshed with the sixth gear 22 for transmission, the seventh gear 21 is meshed with the eighth gear 25 for transmission, the ninth gear 26 is meshed with the tenth gear 13 for transmission, the fifth rotating shaft 12 is fixedly connected with a transmission shaft 9, a sixth rotating shaft 24 is rotatably sleeved on the mounting plate 10, an eleventh gear 23 is fixedly sleeved on the sixth rotating shaft 24, the eleventh gear 23 is meshed with the sixth gear 22 for transmission, the sixth rotating shaft 24 is fixedly connected with a second connecting shaft 6, the second connecting shaft 6 passes through the shell cover 2, and a hexagonal groove 5 is provided on the top of the second connecting shaft 6. The second rotating shaft 14, the third rotating shaft 28, the fourth rotating shaft 27, the fifth rotating shaft 12, and the sixth rotating shaft 24 are respectively rotatably connected to the mounting plate 10 through bearings. The diameter of the first gear 16 is smaller than the diameter of the second gear 17, the diameter of the third gear 18 is smaller than the diameter of the fourth gear 20, the diameter of the fifth gear 19 is smaller than the diameter of the sixth gear 22, the diameter of the seventh gear 21 is smaller than the diameter of the eighth gear 25, the diameter of the ninth gear 26 is smaller than the diameter of the tenth gear 13, and the diameter of the eleventh gear 23 is smaller than the diameter of the sixth gear 22. When adjustment is required, the servo motor 11 drives the first gear 16 to rotate, and the first gear 16 drives the first rotating shaft 15 to rotate through meshing transmission with the second gear 17. A rotating shaft 15 drives the third gear 18 to rotate, the third gear 18 drives the second rotating shaft 14 to rotate by meshing with the fourth gear 20, the second rotating shaft 14 drives the fifth gear 19 to rotate, the fifth gear 19 drives the third rotating shaft 28 to rotate by meshing with the sixth gear 22, the third rotating shaft 28 drives the seventh gear 21 to rotate, the seventh gear 21 drives the fourth rotating shaft 27 to rotate by meshing with the eighth gear 25, the fourth rotating shaft 27 drives the ninth gear 26 to rotate, the ninth gear 26 can drive the fifth rotating shaft 12 to rotate by meshing with the tenth gear 13, the fifth rotating shaft 12 drives the transmission shaft 9 to rotate, so that the valve stem of the valve body can be driven to rotate through the transmission shaft 9, so as to achieve the purpose of electric adjustment;The first gear 16 is meshed with the second gear 17 for a first-stage reduction adjustment, the third gear 18 is meshed with the fourth gear 20 for a second-stage reduction adjustment, the fifth gear 19 is meshed with the sixth gear 22 for a third-stage reduction adjustment, the seventh gear 21 is meshed with the eighth gear 25 for a fourth-stage reduction adjustment, and the ninth gear 26 is meshed with the tenth gear 13 for a fifth-stage reduction adjustment; through the above-mentioned five-stage reduction adjustment, a higher adjustment accuracy can be achieved, the servo motor 11 carries a smaller torque, has a longer service life, and has better stability; through the hexagonal wrench matching the hexagonal groove 5 on the second connecting shaft 6, the second connecting shaft 6 can be turned to rotate, and the second connecting shaft 6 drives the sixth rotating shaft 24 to rotate, and the sixth The rotating shaft 24 drives the eleventh gear 23 to rotate, the eleventh gear 23 can drive the third rotating shaft 28 to rotate by meshing with the sixth gear 22, the third rotating shaft 28 drives the seventh gear 21 to rotate, the seventh gear 21 drives the fourth rotating shaft 27 to rotate by meshing with the eighth gear 25, the fourth rotating shaft 27 drives the ninth gear 26 to rotate, the ninth gear 26 can drive the fifth rotating shaft 12 to rotate by meshing with the tenth gear 13, the fifth rotating shaft 12 drives the transmission shaft 9 to rotate, so that the valve stem of the valve body can be driven to rotate through the transmission shaft 9, thereby achieving the purpose of manual adjustment, ensuring that manual adjustment can still be performed when the servo motor 11 fails, achieving double insurance, and good stability. ;

[0021] Reference Figure 2 , Figure 4 The shell 1 and the shell cover 2 are fixedly connected by screws. A connecting seat 8 for connecting with the valve body is fixed at the bottom of the shell 1. A transmission shaft 9 passes through the connecting seat 8. The transmission shaft 9 is used to be fixedly connected with the valve stem of the valve body. A spline groove 29 is provided at the bottom end of the transmission shaft 9.

[0022] Reference Figure 1 The fifth rotating shaft 12 is fixedly sleeved with the first connecting shaft 3, the first connecting shaft 3 passes through the shell cover 2 and is fixed with a pointer 7, and a scale ring 4 for indicating the rotation angle of the pointer 7 is installed on the shell cover 2. Since the transmission shaft 9, the fifth rotating shaft 12, and the first connecting shaft 3 are fixed in sequence, the transmission shaft 9, the fifth rotating shaft 12, and the first connecting shaft 3 rotate synchronously. Therefore, the angle indicated by the pointer 7 on the scale ring 4 can reflect the rotation angle of the transmission shaft 9, that is, the rotation angle of the valve stem of the valve body.

[0023] Working principle:

[0024] During electric adjustment, when adjustment is required, the servo motor 11 drives the first gear 16 to rotate, the first gear 16 drives the first shaft 15 to rotate through meshing transmission with the second gear 17, the first shaft 15 drives the third gear 18 to rotate, the third gear 18 drives the second shaft 14 to rotate through meshing transmission with the fourth gear 20, the second shaft 14 drives the fifth gear 19 to rotate, the fifth gear 19 drives the third shaft 28 to rotate through meshing transmission with the sixth gear 22, the third shaft 28 drives the seventh gear 21 to rotate, the seventh gear 21 drives the fourth shaft 27 to rotate through meshing transmission with the eighth gear 25, the fourth shaft 27 drives the ninth gear 26 to rotate, the ninth gear 26 can drive the fifth shaft 12 to rotate through meshing with the tenth gear 13, the fifth shaft 12 drives the transmission shaft 9 to rotate, so that the valve stem of the valve body can be driven to rotate through the transmission shaft 9, thereby achieving the purpose of electric adjustment;

[0025] During manual adjustment: the second connecting shaft 6 can be rotated by using an inner hexagonal wrench matching the inner hexagonal groove 5 on the second connecting shaft 6, and the second connecting shaft 6 drives the sixth rotating shaft 24 to rotate, and the sixth rotating shaft 24 drives the eleventh gear 23 to rotate, and the eleventh gear 23 can drive the third rotating shaft 28 to rotate by meshing with the sixth gear 22, and the third rotating shaft 28 drives the seventh gear 21 to rotate, and the seventh gear 21 drives the fourth rotating shaft 27 to rotate by meshing with the eighth gear 25, and the fourth rotating shaft 27 drives the ninth gear 26 to rotate, and the ninth gear 26 drives the fifth rotating shaft 12 to rotate by meshing with the tenth gear 13, and the fifth rotating shaft 12 drives the transmission shaft 9 to rotate, so that the valve stem of the valve body can be driven to rotate through the transmission shaft 9, thereby achieving the purpose of manual adjustment, ensuring that manual adjustment can still be performed when the servo motor 11 fails, realizing double insurance and good stability;

[0026] The first gear 16 is meshed with the second gear 17 for a first-stage reduction adjustment, the third gear 18 is meshed with the fourth gear 20 for a second-stage reduction adjustment, the fifth gear 19 is meshed with the sixth gear 22 for a third-stage reduction adjustment, the seventh gear 21 is meshed with the eighth gear 25 for a fourth-stage reduction adjustment, and the ninth gear 26 is meshed with the tenth gear 13 for a fifth-stage reduction adjustment. Through the above-mentioned five-stage reduction adjustment, a higher adjustment accuracy can be achieved, the servo motor 11 carries a smaller torque, has a longer service life, and has better stability.

[0027] It should be particularly noted that in the present invention, the connecting seat 8 is fixedly connected to the valve body, the transmission shaft 9 is fixedly connected to the valve stem of the valve body, and a spline shaft matching the spline groove 29 is provided on the valve stem of the valve body, and the spline shaft is inserted into the spline groove 29 to achieve connection.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transmission structure of an electric actuator, comprising a housing (1) and a housing cover (2), characterized in that: A mounting plate (10) is fixed inside the housing (1) by screws, and a first rotating shaft (15), a second rotating shaft (14), a third rotating shaft (28), a fourth rotating shaft (27), and a fifth rotating shaft (12) are rotatably sleeved on the mounting plate (10); a second gear (17) and a third gear (18) are fixedly sleeved on the first rotating shaft (15); a fourth gear (20) and a fifth gear (19) are fixedly sleeved on the second rotating shaft (14); a sixth gear (22) and a seventh gear (21) are fixedly sleeved on the third rotating shaft (28); and an eighth gear (25) and a ninth gear (26) are fixedly sleeved on the fourth rotating shaft (27). ), a tenth gear (13) is fixedly sleeved on the fifth rotating shaft (12), a servo motor (11) is mounted on the mounting plate (10), a first gear (16) is fixedly sleeved on the output shaft of the servo motor (11), the first gear (16) is meshed with the second gear (17) for transmission, the third gear (18) is meshed with the fourth gear (20) for transmission, the fifth gear (19) is meshed with the sixth gear (22) for transmission, the seventh gear (21) is meshed with the eighth gear (25) for transmission, the ninth gear (26) is meshed with the tenth gear (13) for transmission, and the fifth rotating shaft (12) is fixedly connected to a transmission shaft (9).

2. The transmission structure of an electric actuator according to claim 1, characterized in that: The housing (1) and the housing cover (2) are fixedly connected by means of screws, and a connecting seat (8) for connecting to a valve body is fixed on the bottom of the housing (1).

3. The transmission structure of an electric actuator according to claim 2, characterized in that: The transmission shaft (9) passes through the connecting seat (8); the transmission shaft (9) is used to be fixedly connected to the valve stem of the valve body; a spline groove (29) is provided at the bottom end of the transmission shaft (9).

4. The transmission structure of an electric actuator according to claim 1, characterized in that: The fifth rotating shaft (12) is fixedly sleeved with a first connecting shaft (3), the first connecting shaft (3) passes through the shell cover (2) and is fixed with a pointer (7), and a scale ring (4) for indicating the rotation angle of the pointer (7) is installed on the shell cover (2).

5. The transmission structure of an electric actuator according to claim 1, characterized in that: A sixth rotating shaft (24) is rotatably sleeved on the mounting plate (10), an eleventh gear (23) is fixedly sleeved on the sixth rotating shaft (24), the eleventh gear (23) is meshed with the sixth gear (22) for transmission, the sixth rotating shaft (24) is fixedly connected to a second connecting shaft (6), the second connecting shaft (6) passes through the shell cover (2), and a hexagonal recess (5) is formed at the top end of the second connecting shaft (6).

6. The transmission structure of an electric actuator according to claim 5, characterized in that: The first rotating shaft (15), the second rotating shaft (14), the third rotating shaft (28), the fourth rotating shaft (27), the fifth rotating shaft (12), and the sixth rotating shaft (24) are respectively rotatably connected to the mounting plate (10) via bearings.

7. The transmission structure of an electric actuator according to claim 6, characterized in that: The diameter of the first gear (16) is smaller than the diameter of the second gear (17), the diameter of the third gear (18) is smaller than the diameter of the fourth gear (20), the diameter of the fifth gear (19) is smaller than the diameter of the sixth gear (22), the diameter of the seventh gear (21) is smaller than the diameter of the eighth gear (25), the diameter of the ninth gear (26) is smaller than the diameter of the tenth gear (13), and the diameter of the eleventh gear (23) is smaller than the diameter of the sixth gear (22).

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