Electric actuating mechanism

Abstract

The utility model relates to an electric actuating mechanism which comprises a box body, the box body is composed of an upper installation box and a lower installation box, the upper installation box and the lower installation box are connected together through bolts, the end portion of the upper end of the lower installation box is a sealing layer, an installation hole is formed in the sealing layer, and a control panel is further installed on the inner side face of the upper installation box. A driving structure and a detection structure are respectively mounted on the sealing layer, the driving structure and the detection structure extend into the lower mounting box, the control panel is connected with the driving structure, the detection structure is connected with the control panel and the driving structure, and a conversion structure capable of realizing manual and electric adjustment is mounted in the lower mounting box. The conversion structure comprises an adjusting structure and a clamping structure, and the conversion structure comprises a first bearing installed at the lower end of the sealing layer. The electric actuating mechanism solves the problems that a transmission relation between gears cannot be effectively guaranteed in meshing transmission between the gears, the structure is complex, and the manufacturing cost is high in an existing electric actuating mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, and specifically relates to an electric actuator. Background Art

[0002] An electric actuator mainly converts electrical energy into mechanical energy and is mainly used for the automatic opening, closing and control of various valves. It is widely used in industrial automation, agriculture, medical treatment, transportation and other fields, such as robots, automated production lines, packaging equipment, printing machinery, medical devices, transportation tools, etc. The existing electric actuators are divided into two execution modes: electric and manual. When a power outage occurs, the electric execution cannot be operated, and in this case, it can be carried out by manual execution. However, when the motor is powered off, manual execution is more laborious to rotate, and forceful rotation will wear the internal gears, which will affect the service life between the gears.

[0003] Because, in order to solve the above technical problems, Chinese Patent CN116642047B, an electric actuator points out (in combination with the attached drawings of this patent Figures 4 - 6 It can be seen, and in combination with paragraph

[0016] of the specification of this patent, it is pointed out that when it is necessary to switch to the electric execution mode, rotate the conversion structure to the first position. When the conversion structure is in the first position, the input end and the output end of the manual input structure are disengaged, and the input end and the output end of the electric input structure are connected, so as to drive the intermediate transmission structure to rotate through the electric input structure. The rotation of the intermediate transmission structure drives the output structure to rotate. Through the conversion structure, the switching between the electric execution mode and the manual execution mode can be realized. The switching is simple and the switching efficiency is high. At the same time, after switching to the manual execution mode, the electric input structure will not be forced to rotate, which not only extends the service life of the electric input structure, but also makes the rotation of the manual input structure more labor-saving. In combination with the attached drawings of this patent Figures 4 - 6 It can be seen that although this patent realizes the transformation of the meshing transmission between the second input gear and the first input gear through the rotation transformation of the first position and the second position of the conversion structure, and solves the problem that it is more laborious when manual conversion is required, this patent still has certain technical problems. When converting through the conversion structure, it is impossible to effectively ensure whether the input gear and the corresponding connecting gear form meshing transmission. Secondly, the structure of this patent is relatively complex, and the cost is relatively high, especially when opening the mold for the installation shell during the manufacturing process.

[0004] Therefore, in order to be able to effectively prevent the gears from failing to quickly achieve meshing transmission and reduce the overall manufacturing cost during the process of electric and manual conversion, an electric actuator is hereby proposed to solve the above existing technical problems. Summary of the Utility Model

[0005] In view of the deficiencies of the prior art, the present utility model provides an electric actuator, which solves the problems that the existing electric actuators cannot effectively ensure the transmission relationship between gears in the meshing transmission between gears and have a complex structure and a high manufacturing cost.

[0006] To achieve the above object, the present utility model provides the following technical solution: An electric actuator includes a box body, which is composed of an upper mounting box and a lower mounting box. The upper mounting box and the lower mounting box are connected together by bolts, and the upper end of the lower mounting box is a closed layer. An installation hole is opened on the closed layer. A control board is also installed on the inner side of the upper mounting box. A driving structure and a detection structure are respectively installed on the closed layer, and both the driving structure and the detection structure extend into the lower mounting box. The control board is connected to the driving structure, and the detection structure is connected to the control board and the driving structure. A conversion structure that can realize the conversion between manual and electric adjustment is installed in the lower mounting box. The conversion structure includes an adjustment structure and a clamping structure. The conversion structure includes a first bearing installed at the lower end of the closed layer. The inner ring of the first bearing is installed with a rotating shaft. A first gear, a second gear, and a bevel gear are respectively installed on the surface of the rotating shaft. The second gear and the bevel gear are an integral structure. A threaded bushing is installed inside the upper end of the rotating shaft, and an opening is provided on the surface of the rotating shaft. The second gear and the bevel gear can move up and down along the opening. An O-shaped connecting block is arranged inside the second gear and the bevel gear. A threaded shaft is arranged inside the O-shaped connecting block and extends upward to the upper end of the upper mounting box. A rotating handle is arranged at the upper end of the threaded shaft. A square bearing seat is installed at the front end of the lower mounting box. The inner ring of the square bearing seat is connected with a connecting shaft. A bevel driving gear is installed at the rear end of the connecting shaft, and a rocking handle is installed at the front end of the connecting shaft.

[0007] Through the above technical solution, further, a movable pin is provided at the front end of the rocking handle and extends toward the rear end of the connecting shaft to the rear side of the bevel driving gear. A telescopic spring is arranged inside the connecting shaft. A stop block is arranged on the surface of the movable pin located inside the connecting shaft. The stop block contacts the telescopic spring. A blocking tooth block is installed at the rear end of the movable pin. The bevel driving gear and the bevel gear form a gear transmission.

[0008] Further, the driving structure includes a motor installed at the upper end of the closed layer. The output end of the motor is connected with a rotating shaft. A small gear is installed at the lower end of the rotating shaft. The small gear and the second gear form a gear transmission.

[0009] As a preferred technical solution, the distance between the second gear and the bevel gear is 1.2 - 1.5 times the width of the small gear.

[0010] Further, a second bearing is also provided at the lower end of the closed layer. The inner ring of the second bearing is connected with the surface of the rotating shaft.

[0011] As a preferred technical solution, the detection structure includes a connection seat installed at the upper end of the closed layer. A detector is installed at the upper end of the connection seat. A shaft is provided at the lower end of the detector and extends into the lower mounting box. A large gear is installed on the surface of the shaft, and the large gear and the first gear form a gear drive.

[0012] Furthermore, the distance between the conical drive gear and the conical gear for meshing drive is greater than the thickness of the small gear, and the height of the blocking tooth block is the width between the second gear and the conical gear.

[0013] As a preferred technical solution, a protective cover is provided at the upper end of the upper mounting box, and the protective cover wraps the rotating handle.

[0014] Compared with the prior art, the present utility model provides an electric actuator, which has the following beneficial effects:

[0015] 1. This electric actuator mainly rotates the rotating handle, so that the threaded shaft rotates to drive the second gear and the conical gear to move upward, so that the small gear is disengaged from the meshing drive with the second gear. Due to the upward movement of the conical gear, the conical gear and the conical drive gear form a gear drive, so that turning the crank can realize manual adjustment. This operation method is relatively convenient. And referring to the attached drawings, the structure is simple and the manufacturing cost is low. When the conical gear moves upward, it is necessary to turn the crank to make the conical drive gear rotate, so as to realize the meshing drive between the conical drive gear and the conical gear. In the comparative document CN116642047B, in an electric actuator, when the conversion rocker arm is rotated, the second fork will push the second input gear backward, but this method cannot be effectively realized. First, the conversion shaft rotates axially, and the second fork rotates axially along the conversion shaft. Therefore, when the second fork rotates, it is impossible to move the second input gear backward (or the movement amount is very small and cannot form a meshing drive). Secondly, even if it can be realized, in the actual operation process, when electric execution is required, the connection relationship between the first input gear and the first connection gear cannot be realized. While this electric actuator can make the blocking tooth block approach the second gear by pressing the movable pin (it should be noted that the blocking tooth block is made of rubber), so that the tooth block is located between the two sets of tooth blocks of the second gear. Because the tooth number relationship of the second gear is the same as that of the small gear, as long as the blocking tooth block is stuck between the two sets of tooth blocks of the second gear, the meshing of the second gear and the small gear can be realized. Therefore, there is no need to worry about the problem that the gears cannot be combined and driven, and it is more laborious during adjustment. Secondly, compared with the comparative document CN116642047B, an electric actuator, this device simplifies the structure, reduces the manufacturing cost, and thus solves the problems that the existing electric actuator cannot effectively ensure the transmission relationship between gears in the meshing drive and the structure is complex and the manufacturing cost is high. Description of the Drawings

[0016] Figure 1 Schematic diagram of the structure of an electric actuator of the present utility model;

[0017] Figure 2 Schematic diagram of the internal structure of an electric actuator of the present utility model;

[0018] Figure 3 Schematic diagram of the structure of the first gear of an electric actuator of the present utility model;

[0019] Figure 4 Schematic diagram of the structure of the large gear of an electric actuator of the present utility model;

[0020] Figure 5 Schematic diagram of the connection between the first gear and the large gear of an electric actuator of the present utility model;

[0021] Figure 6 Schematic diagram of the structure of the small gear of an electric actuator of the present utility model;

[0022] Figure 7 Schematic diagram of the sectional structure of the connecting shaft of an electric actuator of the present utility model;

[0023] Figure 8 Schematic diagram of the structure of the O-shaped connecting block of an electric actuator of the present utility model;

[0024] Figure 9 Schematic diagram of the structure of the threaded shaft of an electric actuator of the present utility model;

[0025] Figure 10 Schematic diagram of an electric actuator of the present utility model Figure 1 Schematic diagram of the partially enlarged structure at position A;

[0026] Figure 11 Schematic diagram of an electric actuator of the present utility model Figure 5 Schematic diagram of the partially enlarged structure at position B;

[0027] Figure 12 Schematic diagram of the engaged state of the blocking tooth block and the second gear of an electric actuator of the present utility model.

[0028] In the figure: 1. Upper mounting box; 2. Lower mounting box; 3. Connecting seat; 4. Detector; 5. Large gear; 6. Rotating shaft; 7. Small gear; 8. First bearing; 9. Rotating shaft; 10. First gear; 11. Second gear; 12. Bevel gear; 13. Square bearing seat; 14. Crank; 15. Connecting shaft; 16. Motor; 17. Conical drive gear; 18. Movable pin; 19. Blocking tooth block; 20. Telescopic spring; 21. Second bearing; 22. Threaded bushing; 23. O-shaped connecting block; 24. Threaded shaft; 25. Rotating handle; 26. Protective cover. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Embodiment

[0031] Please refer to Figures 1 - 12 , the present invention provides the following technical solutions: An electric actuator includes a box body, which is composed of an upper mounting box 1 and a lower mounting box 2. The upper mounting box 1 and the lower mounting box 2 are connected together by bolts, and the upper end of the lower mounting box 2 is a closed layer with a mounting hole opened on it. A control board is also installed on the inner side of the upper mounting box 1. A driving structure and a detection structure are respectively installed on the closed layer, and both the driving structure and the detection structure extend into the lower mounting box 2. The control board is connected to the driving structure, and the detection structure is connected to the control board and the driving structure. A conversion structure that can realize the conversion between manual and electric adjustment is installed in the lower mounting box 2. The conversion structure includes an adjustment structure and a clamping structure. The conversion structure includes a first bearing 8 installed at the lower end of the closed layer. The inner ring of the first bearing 8 is installed with a rotating shaft 9. A first gear 10, a second gear 11, and a bevel gear 12 are respectively installed on the surface of the rotating shaft 9. The second gear 11 and the bevel gear 12 are an integral structure. A threaded bushing 22 is installed inside the upper end of the rotating shaft 9, and an opening is provided on the surface of the rotating shaft 9. The second gear 11 and the bevel gear 12 can move up and down along the opening. An O-shaped connecting block 23 is arranged inside the second gear 11 and the bevel gear 12. A threaded shaft 24 is arranged inside the O-shaped connecting block 23 and extends upward to the upper end of the upper mounting box 1. A rotating handle 25 is arranged at the upper end of the threaded shaft 24. A square bearing seat 13 is installed at the front end of the lower mounting box 2. The inner ring of the square bearing seat 13 is connected to a connecting shaft 15. A conical drive gear 17 is installed at the rear end of the connecting shaft 15, and a crank 14 is installed at the front end of the connecting shaft 15.

[0032] In this implementation, the specific working principle is as follows: When this electric actuator is mainly converted to a manual actuator, by rotating the rotary handle 25 (mainly through the threaded connection relationship between the O-shaped connecting block 23 and the threaded shaft 24), the second gear 11 and the bevel gear 12 move upward along the opening on the surface of the rotating shaft 9. At this time, it should be noted that the operator needs to press the movable pin 18 so that the blocking tooth block 19 can contact the surface of the second gear 11, preventing the problem that the rotation of the rotating shaft 9 itself causes the second gear 11 from being unable to move upward (for details, see Figure 12 as shown). It should also be noted that the blocking tooth block 19 is made of plastic, so it will not cause wear to the surface of the second gear 11. After the second gear 11 continues to rise, the gear connection relationship between the second gear 11 and the pinion gear 7 is released, and then the bevel gear 12 and the bevel driving gear 17 form a gear drive. At this time, rotating the rocker 14 can drive the connecting shaft 15 to rotate, thereby driving the bevel driving gear 17 to rotate, driving the second gear 11 to rotate, driving the rotating shaft 9 to rotate, driving the first gear 10 to rotate, and driving the large gear 5 to rotate, so as to achieve manual adjustment. When performing electric adjustment, only need to press the movable pin 18 to drive the blocking tooth block 19 to insert between the two tooth blocks of the second gear 11, and refer to Figure 12 as shown. The number of teeth of the second gear 11 and the pinion gear 7 and the matching relationship of the corresponding teeth are set in advance during installation. Therefore, only by snapping the blocking tooth block 19 can it be ensured that the second tooth block 11 and the pinion gear 7 generate gear drive. Compared with the existing patent CN116642047B, an electric actuator, there is no need to worry about whether the gear drive between the internal gears of the device is realized, the operation is more convenient, the structure is simplified, and the manufacturing cost is reduced, thus solving the problems that the existing electric actuator cannot effectively ensure the gear drive relationship between gears and has a complex structure and high manufacturing cost.

[0033] It should also be noted that compared with the existing patent CN116642047B, an electric actuator, this electric actuator only changes the conversion method. How to accurately open and close the valve, and its control principle is the same as that of the existing technology CN116642047B, an electric actuator, which is through the combined control of the control board, the detector 4, and the motor 16, and is specifically similar to the description in paragraph 45 of the above patent specification.

[0034] According to the above, in order to prevent the problem that the second gear 11 cannot move upward when rotating the rotary handle 25, for details, see Figure 2 , Figure 7 , Figure 12It can be seen that a movable pin 18 is provided at the front end of the crank 14 and extends towards the rear end of the connecting shaft 15 to the rear side of the conical drive gear 17. A telescopic spring 20 is provided inside the connecting shaft 15. A stop block is provided on the surface of the movable pin 18 located inside the connecting shaft 15. The stop block contacts the telescopic spring 20. A blocking tooth block 19 is installed at the rear end of the movable pin 18. The conical drive gear 17 and the conical gear 12 form a gear drive. Press the movable pin 18 to push the blocking tooth block 19 to move, so that the blocking tooth block 19 is stuck between two groups of tooth blocks of the second gear 11. After the conversion process is completed, release the movable pin 18, and through the action of the telescopic spring 20, the automatic reset of the movable pin 18 is realized.

[0035] For the specific drive structure, reference can be made to Figure 2 It can be seen that the drive structure includes a motor 16 installed at the upper end of the closed layer. The output end of the motor 16 is connected to a rotating shaft 6. A small gear 7 is installed at the lower end of the rotating shaft 6. The small gear 7 and the second gear 11 form a gear drive. The motor 16 drives the rotating shaft 6 to rotate, and then drives the small gear 7 to rotate, so as to drive the second gear 11 to rotate.

[0036] In order to prevent the problem that when the second gear 11 moves upward and after the conical gear 12 contacts the conical drive gear 17, the second gear 11 does not disengage from the gear drive relationship with the small gear 7, resulting in difficult rotation, for the specific situation, reference can be made to Figure 6 It can be seen that the distance between the second gear 11 and the conical gear 12 is 1.2 - 1.5 times the width of the small gear 7. By reducing the width of the small gear 7, the distance between the second gear 11 and the conical gear 12 is made greater than the width of the small gear 7. Therefore, when the small gear 7 disengages from the second gear 11, the state of not being disengaged will not occur.

[0037] Reference Figure 6 It can be seen that a second bearing 21 is further provided at the lower end of the closed layer. The inner ring of the second bearing 21 is connected to the surface of the rotating shaft 6.

[0038] Reference Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 It can be seen that the detection structure includes a connecting seat 3 installed at the upper end of the closed layer. A detector 4 is installed at the upper end of the connecting seat 3. A shaft is provided at the lower end of the detector 4 and extends into the lower mounting box 2. A large gear 5 is installed on the surface of the shaft. The large gear 5 and the first gear 10 form a gear drive. Whether it is electrically actuated or manually actuated, the first gear 10 drives the large gear 5 to rotate. That is to say, the first gear 10 is fixedly installed on the surface of the rotating shaft 9. Moreover, the opening on the surface of the rotating shaft 9 is located on the surface of the rotating shaft 9 below the first gear 10.

[0039] In order to ensure that when the conical drive gear 17 and the bevel gear 12 form a gear drive, the second gear 12 can be completely disengaged from the pinion gear 7, making the transmission between the conical drive gear 17 and the bevel gear 12 more convenient. Therefore, the distance between the conical drive gear 17 and the bevel gear 12 for meshing transmission is greater than the thickness of the pinion gear 7, and the height of the blocking tooth block 19 is the width between the second gear 11 and the bevel gear 12.

[0040] To prevent potential safety hazards caused by the rotation of the rotary handle 25, please refer to Figure 1 As can be seen, a protective cover 26 is provided at the upper end of the upper mounting box 1, and the protective cover 26 wraps the rotary handle 25. Since the rotary handle 25 rotates whether manually or electrically, the protective cover 26 wraps the rotary handle 25, thus preventing potential safety hazards.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric actuator, comprising a box body, which is composed of an upper mounting box (1) and a lower mounting box (2). The upper mounting box (1) and the lower mounting box (2) are connected together by bolts, and the upper end of the lower mounting box (2) is a closed layer. An installation hole is opened on the closed layer. A control board is also installed on the inner side surface of the upper mounting box (1). A driving structure and a detection structure are respectively installed on the closed layer, and both the driving structure and the detection structure extend into the lower mounting box (2). The control board is connected to the driving structure, and the detection structure is connected to the control board and the driving structure. It is characterized in that: Inside the lower mounting box (2), a conversion structure that can achieve manual and electric adjustment is installed. The conversion structure includes an adjustment structure and a clamping structure. The conversion structure includes a first bearing (8) installed at the lower end of the closed layer. The inner ring of the first bearing (8) is installed with a rotating shaft (9). On the surface of the rotating shaft (9), a first gear (10), a second gear (11), and a bevel gear (12) are respectively installed. The second gear (11) and the bevel gear (12) are an integral structure. Inside the upper end of the rotating shaft (9), a threaded bushing (22) is installed, and an opening is provided on the surface of the rotating shaft (9). The second gear (11) and the bevel gear (12) can move up and down along the opening. Inside the second gear (11) and the bevel gear (12), an O-shaped connecting block (23) is provided. Inside the O-shaped connecting block (23), a threaded shaft (24) is provided and extends upward to the upper end of the upper mounting box (1). At the upper end of the threaded shaft (24), a rotating handle (25) is provided. At the front end of the lower mounting box (2), a square bearing seat (13) is installed. The inner ring of the square bearing seat (13) is connected with a connecting shaft (15). At the rear end of the connecting shaft (15), a bevel driving gear (17) is installed. At the front end of the connecting shaft (15), a rocking handle (14) is installed.

2. An electric actuator according to claim 1, characterized in that: At the front end of the rocking handle (14), a movable pin (18) is provided and extends toward the rear end of the connecting shaft (15) to the rear side of the bevel driving gear (17). Inside the connecting shaft (15), a telescopic spring (20) is provided. On the surface of the movable pin (18) located inside the connecting shaft (15), a stop block is provided. The stop block contacts the telescopic spring (20). At the rear end of the movable pin (18), a blocking tooth block (19) is installed. The bevel driving gear (17) and the bevel gear (12) form a gear transmission.

3. An electric actuator according to claim 1, characterized in that: The driving structure includes a motor (16) installed at the upper end of the closed layer. The output end of the motor (16) is connected with a rotating shaft (6). At the lower end of the rotating shaft (6), a small gear (7) is installed. The small gear (7) and the second gear (11) form a gear transmission.

4. An electric actuator according to claim 3, characterized in that: The distance between the second gear (11) and the bevel gear (12) is 1.2 - 1.5 times the width of the small gear (7).

5. An electric actuator according to claim 1, characterized in that: At the lower end of the closed layer, a second bearing (21) is further provided. The inner ring of the second bearing (21) is connected with the surface of the rotating shaft (6).

6. An electric actuator according to claim 1, characterized in that: The detection structure includes a connecting seat (3) installed at the upper end of the closed layer. At the upper end of the connecting seat (3), a detector (4) is installed. At the lower end of the detector (4), a shaft is provided and extends into the lower mounting box (2). On the surface of the shaft, a large gear (5) is installed. The large gear (5) and the first gear (10) form a gear transmission.

7. An electric actuator according to claim 1, characterized in that: The distance between the bevel driving gear (17) and the bevel gear (12) for meshing transmission is greater than the thickness of the small gear (7), and the height of the blocking tooth block (19) is the width between the second gear (11) and the bevel gear (12).

8. An electric actuator according to claim 1, characterized in that: At the upper end of the upper mounting box (1), a protective cover (26) is provided. The protective cover (26) wraps the rotating handle (25) inside.

Images