High-precision anti-over-rotation small electric actuator

Abstract

The utility model relates to the technical field of electric actuators, and discloses a high-precision anti-over-rotation small electric actuator which comprises a shell assembly, a bottom shell is arranged at the bottom of the shell assembly, an upper shell is arranged at the upper end of the shell assembly, a limiting groove is formed in the bottom shell, a bone plate frame is installed in the bottom shell, and the bone plate frame is connected with the limiting groove. A limiting groove is formed in the upper shell, a bone plate frame is located above the limiting groove, a motor is arranged on the surface of the upper end of the bone plate frame, a plurality of connecting grooves are formed in the bottom of the bottom shell, speed reduction transmission assemblies are arranged in the connecting grooves, and a protection cavity is formed in the upper shell. Due to the fact that the speed reduction transmission assembly is connected with the bone plate frame through the connecting groove formed in the bottom of the bottom shell, the bone plate frame can be attached to the upper shell in a large area, the overall size of the electric actuator is reduced, and a user can conveniently conduct subsequent use and installation.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to a small-sized electric actuator with high precision and anti-overrotation. Background Art

[0002] An intelligent valve combines an actuator with a traditional valve to achieve the function of intelligent control of the valve switch. An actuator is a combination of an actuator and a control valve in an automatic control system. Its role in the automatic control system is to receive signals from a regulator and adjust the flow rate of the process medium according to its position and characteristics in the process pipeline, so as to control the controlled variable within the range required by the production process.

[0003] In the existing electric actuator, the motor and the reduction gear part are both arranged in a common chamber without an independent installation structure, and the structural layout of the existing electric actuator is relatively general, resulting in a large overall volume and great inconvenience for installation. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a small-sized electric actuator with high precision and anti-overrotation to solve the problems mentioned in the above background art that the motor and the reduction gear part of the existing electric actuator are both arranged in a common chamber without an independent installation structure, and the structural layout of the existing electric actuator is relatively general, resulting in a large overall volume and great inconvenience for installation.

[0005] To achieve the above object, the utility model provides the following technical solution: A small-sized electric actuator with high precision and anti-overrotation, including a housing assembly. A bottom housing is arranged at the bottom of the housing assembly, and an upper housing is arranged at the upper end of the housing assembly. A limiting groove is arranged inside the bottom housing, and a bone plate frame is installed inside the bottom housing. The bone plate frame is located above the limiting groove, and a motor is arranged on the upper surface of the bone plate frame. A plurality of connecting grooves are opened at the bottom of the bottom housing, and a reduction drive assembly is arranged inside the connecting grooves. A protection chamber is arranged on the upper housing, and the motor is covered by the protection chamber arranged on the upper housing. An avoidance area is arranged on the upper housing.

[0006] By adopting the above technical solution, since the positions of the reserved holes opened on the upper housing and the bottom housing coincide with each other, after the bottom housing and the upper housing are butted against each other, bolts or other fixing tools are used to insert into the reserved holes to install the housings inside the electric actuator. Then, because the reduction drive assembly is connected to the bone plate frame through the connecting grooves opened at the bottom of the bottom housing, the bone plate frame can be closely attached to the upper housing, so that the overall size of the electric actuator is reduced, facilitating subsequent use and installation by the user.

[0007] Preferably, a microswitch is provided inside the speed reduction transmission assembly. The microswitch is electrically connected to the motor. A speed reduction gear is provided inside the speed reduction transmission assembly. An output gear is provided inside the speed reduction transmission assembly. An output member is provided inside the bottom housing.

[0008] With the above technical solution, the microswitch electrically connected to the motor will stop rotating. Then, when the microswitch stops rotating, the speed reduction transmission assembly meshed with it will also stop rotating accordingly.

[0009] Preferably, a position feedback member is provided on the upper surface of the output gear.

[0010] With the above technical solution, when the position feedback member abuts against the limit member, the instantaneous current of the motor increases. Then, when the control circuit board detects the increased current, it controls the motor to stop rotating.

[0011] Preferably, a track groove is provided on the bone plate frame. The head and tail ends of the track groove can abut against the position feedback member to form a limit fit. The top end of the position feedback member is located in the avoidance area.

[0012] With the above technical solution, the avoidance area provided on the upper housing can protect the position feedback member, and at the same time, it can also provide enough installation and movement space for the position feedback member.

[0013] Preferably, a docking port is provided at the bottom of the bottom housing. A plurality of reserved holes are provided inside the bottom housing. The positions of the reserved holes provided on the bottom housing coincide with the positions of the reserved holes provided on the upper housing. A through hole is provided at the bottom of the bottom housing. Connecting plates are fixedly installed on both side end faces of the bottom housing. Positioning holes are provided on the connecting plates.

[0014] With the above technical solution, by using bolts or other fixing tools to insert into the reserved holes, the installation between the housings inside the electric actuator can be achieved. Then, the docking port provided at the bottom of the bottom housing is convenient for the user to dock with the valve stem on the flow meter subsequently. The positioning holes provided on the connecting plates on both sides of the bottom housing cooperate with the through hole provided at the bottom of the bottom housing, which can make the electric actuator better installed.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. For this highly precise anti-overrotation small electric actuator, since the speed reduction transmission assembly is connected to the bone plate frame through the connecting groove provided at the bottom of the bottom housing, the bone plate frame can be made to fit closely with the upper housing over a large area, thereby reducing the overall size of the electric actuator, which is convenient for the user to use and install subsequently.

[0017] 2. The highly precise anti-overrotation small electric actuator is convenient for the user to subsequently dock with the valve stem on the flow meter through the docking port opened at the bottom of the bottom housing. Then, the positioning holes opened on the connecting plates on both sides of the bottom housing cooperate with the through holes opened at the bottom of the bottom housing, enabling the better installation of the electric actuator. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the anti-overrotation small electric actuator of the present utility model;

[0019] Figure 2 It is an exploded structural schematic diagram of the anti-overrotation small electric actuator of the present utility model;

[0020] Figure 3 It is a schematic diagram of the reduction drive assembly and its related structures of the present utility model;

[0021] Figure 4 It is a schematic diagram of the positioning hole and its related structures of the present utility model.

[0022] In the figures: 1. Housing assembly; 2. Bottom housing; 3. Upper housing; 4. Limiting groove; 5. Bone plate frame; 6. Motor; 7. Connecting groove; 8. Reduction drive assembly; 9. Microswitch; 10. Reduction gear; 11. Output gear; 12. Output component; 13. Position feedback component; 14. Trajectory groove; 15. Avoidance area; 16. Docking port; 17. Reserved hole; 18. Through hole; 19. Connecting plate; 20. Positioning hole. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1:

[0025] Please refer to FIGS. 1-4 for combination. A highly precise anti-overrotation small electric actuator. A limiting groove 4 is arranged in the bottom shell 2. A bone plate frame 5 is installed in the bottom shell 2. The bone plate frame 5 is located above the limiting groove 4. A plurality of connection grooves 7 are formed in the bottom of the bottom shell 2. A speed reduction transmission assembly 8 is arranged in the connection groove 7. A motor 6 is arranged on the upper surface of the bone plate frame 5. A plurality of connection grooves 7 are formed in the bottom of the bottom shell 2. A speed reduction transmission assembly 8 is arranged in the connection groove 7. A protection cavity is arranged on the upper shell 3. The motor 6 is covered by the protection cavity arranged on the upper shell 3. An avoidance area 15 is arranged on the upper shell 3. A microswitch 9 is arranged in the speed reduction transmission assembly 8. The microswitch 9 is electrically connected to the motor 6. A speed reduction gear 10 is arranged in the speed reduction transmission assembly 8. An output gear 11 is arranged in the speed reduction transmission assembly 8. An output component 12 is arranged in the bottom shell 2. A position feedback member 13 is arranged on the upper surface of the output gear 11. A track groove 14 is formed in the bone plate frame 5. The head and tail ends of the track groove 14 can abut against the position feedback member 13 to form a limiting fit. The top end of the position feedback member 13 is located in the avoidance area 15.

[0026] Working principle: The connection groove 7 arranged in the bottom shell 2 can maintain the stability of the speed reduction transmission assembly 8. Then the position feedback member 13 abuts against the limiting member to form a limiting fit. When the position feedback member 13 abuts against the limiting member, the instantaneous current of the motor 6 increases. Then when the control circuit board detects the increase in current, it controls the motor 6 to stop rotating. Then, by combining the operating characteristics of the motor 6 with the circuit characteristics and applying them to the product of the electric actuator, once the motor 6 encounters limiting and jamming, the instantaneous current at the motor 6 in the circuit will increase significantly, so that the control circuit board can capture the signal of abnormal current, and immediately issue an order to the motor 6 to stop rotating. After the motor 6 issues the order to stop rotating, the microswitch 9 electrically connected to the motor 6 will stop rotating. Then when the microswitch 9 stops rotating, the speed reduction transmission assembly 8 meshed with it will also stop rotating accordingly. At the same time, the avoidance area 15 arranged on the upper shell 3 can protect the position feedback member 13, and at the same time, it can also provide enough installation and movement space for the position feedback member 13. Since the speed reduction transmission assembly 8 is connected to the bone plate frame 5 through the connection groove 7 formed in the bottom of the bottom shell 2, the bone plate frame 5 can be closely attached to the upper shell 3 over a large area, so as to reduce the overall size of the electric actuator, making it convenient for users to use and install subsequently.

[0027] Embodiment 2:

[0028] Please refer to FIGS. 1-4 for reference. A highly precise anti-overrotation small electric actuator, a bottom housing 2 is provided at the bottom of the housing assembly 1, an upper housing 3 is provided at the upper end of the housing assembly 1, a docking port 16 is opened at the bottom of the bottom housing 2, a plurality of reserved holes 17 are opened inside the bottom housing 2, the positions of the reserved holes 17 opened on the bottom housing 2 coincide with the positions of the reserved holes 17 opened on the upper housing 3, a through hole 18 is opened at the bottom of the bottom housing 2, connecting plates 19 are fixedly installed on both end faces of the bottom housing 2, and positioning holes 20 are opened on the connecting plates 19.

[0029] Working principle: Since the positions of the reserved holes 17 opened on the upper housing 3 and the bottom housing 2 coincide with each other, after the bottom housing 2 and the upper housing 3 are docked, bolts or other fixing tools are used to insert into the reserved holes 17, so as to install the housings inside the electric actuator. Then, the docking port 16 opened at the bottom of the bottom housing 2 facilitates the subsequent docking of the user with the valve stem on the flow meter. Then, the positioning holes 20 opened on the connecting plates 19 on both sides of the bottom housing 2 cooperate with the through hole 18 opened at the bottom of the bottom housing 2, which can make the electric actuator better installed.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly precise small electric actuator for preventing over-rotation, comprising a housing assembly (1), characterized in that: A bottom housing (2) is provided at the bottom of the housing assembly (1), an upper housing (3) is provided at the upper end of the housing assembly (1), a limiting groove (4) is provided in the bottom housing (2), a bone plate frame (5) is installed in the bottom housing (2), the bone plate frame (5) is located above the limiting groove (4), a motor (6) is provided on the upper surface of the bone plate frame (5), a plurality of connection grooves (7) are formed in the bottom of the bottom housing (2), a speed reduction transmission assembly (8) is provided in the connection groove (7), a protection cavity is provided on the upper housing (3), the motor (6) is covered by the protection cavity provided on the upper housing (3), and an avoidance area (15) is provided on the upper housing (3).

2. The high-precision anti-overrotation small electric actuator according to claim 1, characterized in that: A micro switch (9) is provided in the speed reduction transmission assembly (8), the micro switch (9) is electrically connected to the motor (6), a speed reduction gear (10) is provided in the speed reduction transmission assembly (8), an output gear (11) is provided in the speed reduction transmission assembly (8), and an output component (12) is provided in the bottom housing (2).

3. The high-precision anti-overrotation small electric actuator according to claim 2, characterized in that: A position feedback member (13) is provided on the upper surface of the output gear (11).

4. A highly accurate anti-overrotation small electric actuator according to claim 1, characterized in that: A track groove (14) is formed in the bone plate frame (5), the head and tail ends of the track groove (14) can abut against the position feedback member (13) to form a limiting fit, and the top end of the position feedback member (13) is located in the avoidance area (15).

5. A highly precise anti-overrotation small electric actuator according to claim 1, characterized in that: An interface (16) is formed in the bottom of the bottom housing (2), a plurality of reserved holes (17) are formed in the interior of the bottom housing (2), the positions of the reserved holes (17) formed in the bottom housing (2) coincide with those of the reserved holes (17) formed in the upper housing (3), a through hole (18) is formed in the bottom of the bottom housing (2), connecting plates (19) are fixedly installed on both side end faces of the bottom housing (2), and positioning holes (20) are formed in the connecting plates (19).

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