Spring reset electric actuating mechanism

Abstract

The utility model discloses a spring reset electric actuating mechanism which comprises a shell, a motor is fixedly connected to the outer wall of the top of the shell, one end of an output shaft of the motor penetrates through the shell and is fixedly connected with a first fluted disc, a rotating hole is formed in the bottom of the shell, a connecting rod is arranged in the rotating hole, the top end of the connecting rod is in key connection with a missing gear, and the missing gear is in key connection with the shell. The top of the missing gear is fixedly connected with a second fluted disc, the second fluted disc is connected with the first fluted disc in a clamped mode, a connecting shaft is rotationally connected into the shell, one end of the connecting shaft penetrates through the shell, and the circumferential outer wall of the connecting shaft is in key connection with a first gear. According to the electric actuating mechanism, the valve can be closed during power failure, resource waste is prevented, the use effect of the electric actuating mechanism is improved, the motor can be prevented from being damaged due to collision, the use safety of the motor is improved, the motor can be prevented from breaking down due to the fact that the temperature in the protective shell is too high, and the heat dissipation effect of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric execution, in particular to a spring-reset electric execution mechanism. Background Art

[0002] An electric actuator is an instrument used in various industrial automation process control links. It uses liquid, gas, electricity or other energy and converts it into a driving force through a motor or other device.

[0003] As disclosed in the patent number CN207864734, a spring return electric actuator, there is a problem in the prior art that the electric actuator cannot continue to work during a power outage, resulting in the valve not being able to close in time, thereby causing a waste of resources. In order to solve such problems, this application proposes an electric actuator with a new structure. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a spring-reset electric actuator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A spring-return electric actuator comprises a shell, the top outer wall of the shell is fixedly connected to a motor, one end of the motor output shaft passes through the shell and is fixedly connected to a first gear plate, a rotating hole is opened at the bottom of the shell, a connecting rod is arranged in the rotating hole, the top end of the connecting rod is keyed to a missing gear, the top of the missing gear is fixedly connected to a second gear plate, and the second gear plate is clamped with the first gear plate, a connecting shaft is rotatably connected in the shell, and one end of the connecting shaft passes through the shell, the circumferential outer wall of the connecting shaft is keyed to the first gear, and the first gear is meshed with the missing gear, a positioning column is fixedly connected to an inner wall of one side of the shell, a rack is slidably connected to the outer side of the positioning column, and the rack is meshed with the first gear, a spring body is sleeved on the outer side of the positioning column, and the two ends of the spring body are respectively fixed to the shell and the first gear, and a support assembly is provided on the top of the shell to support the missing gear.

[0007] As a further solution of the utility model, the supporting assembly includes a fixing ring, which is arranged on the bottom outer wall of the shell, and the fixing ring is connected to the shell through an adjusting component. A plurality of push rods are fixedly connected to the top of the fixing ring, and the push rods pass through the shell, and balls are provided on the top ends of the plurality of push rods.

[0008] As a further solution of the utility model, the adjusting component is a threaded rod, the threaded rod is rotatably connected to the bottom outer wall of the shell, and the threaded rod passes through the fixing ring and is threadedly connected to the fixing ring.

[0009] As a further solution of the utility model, a protective shell is fixedly connected to the top outer wall of the shell, and the motor is located in the protective shell.

[0010] As a further solution of the utility model, a plurality of mounting holes are provided on both sides of the protective shell, and a heat sink is fixedly connected to each of the plurality of mounting holes.

[0011] As a further solution of the utility model, a protective plate is fixedly connected to one side of the plurality of heat dissipation plates located on the same side.

[0012] As a further solution of the utility model, a knob for rotating the connecting rod is fixedly connected to the bottom end of the connecting rod.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the setting of the connecting rod, when the motor is powered off, the support assembly no longer supports the missing gear. At this time, the missing gear will move downward under the action of gravity, so that the second gear plate is disengaged from the first gear plate, and then the missing gear will continue to rotate to disengage the missing gear from the first gear. At this time, the rack will move under the action of the spring, and the rack will drive the first gear to rotate, so that the connecting shaft closes the valve, so that the valve can also be closed during a power outage, preventing waste of resources and improving the use effect of the electric actuator.

[0015] 2. Through the setting of the protective shell, the motor is set in the protective shell, and the protective shell can protect the motor, thereby preventing the motor from being damaged by collision, thereby improving the safety of the motor.

[0016] 3. Through the setting of the heat sink, the heat sink can dissipate the heat generated by the motor in the protective shell, thereby avoiding the motor failure caused by the excessive temperature inside the protective shell, and improving the heat dissipation effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the upper three-dimensional structure of a spring return electric actuator proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the bottom three-dimensional cross-sectional structure of a spring return electric actuator proposed by the utility model;

[0019] Figure 3 The utility model is a schematic diagram of a cross-sectional structure of a shell of a spring-return electric actuator.

[0020] In the figure: 1. protective shell; 2. heat sink; 3. protective plate; 4. shell; 5. fixing ring; 6. threaded rod; 7. connecting shaft; 8. push rod; 9. first gear plate; 10. second gear plate; 11. missing gear; 12. ball; 13. connecting rod; 14. rack; 15. positioning column; 16. spring body; 17. first gear. DETAILED DESCRIPTION

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, so that the embodiments of the application described here, based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0022] Reference Figure 1-Figure 3A spring return electric actuator comprises a housing 4, a motor is fixed to the top outer wall of the housing 4 by bolts, one end of the motor output shaft passes through the housing 4 and is fixed to a first toothed disc 9 by bolts, a rotating hole is opened at the bottom of the housing 4, a connecting rod 13 is arranged in the rotating hole, a top key of the connecting rod 13 is connected to a missing gear 11, a knob for rotating the connecting rod 13 is welded to the bottom end of the connecting rod 13, and the connecting rod 13 can be rotated by the knob, a second toothed disc 10 is fixed to the top of the missing gear 11 by bolts, and the ... The disk 10 is engaged with the first toothed disk 9, and the housing 4 is rotatably connected with the connecting shaft 7, and one end of the connecting shaft 7 passes through the housing 4, and the circumferential outer wall of the connecting shaft 7 is keyed to the first gear 17, and the first gear 17 is meshed with the missing gear 11, and a positioning column 15 is welded to the inner wall of one side of the housing 4, and the outer side of the positioning column 15 is slidably connected with the rack 14, and the rack 14 is meshed with the first gear 17, and the outer side of the positioning column 15 is sleeved with a spring body 16, and the two ends of the spring body 16 are respectively connected to the housing 4 and the first gear 17 The first gear 17 is fixed to the housing 4, and a supporting assembly is provided on the top of the housing 4 to support the missing gear 11, so that the connecting shaft 7 is connected to the valve, and then the first gear disc 9 is driven to rotate by the motor. At this time, since the first gear disc 9 is engaged with the second gear disc 10, the first gear disc 9 will drive the second gear disc 10 to rotate, and the second gear disc 10 will drive the missing gear 11 to rotate, and the missing gear 11 drives the first gear 17 to rotate, and the first gear 17 will drive the connecting shaft 7 to rotate, thereby opening the valve. When the power is off, the supporting assembly no longer supports the missing gear 11. At this time, the missing gear 11 will move downward under the action of gravity, so that the second gear disc 10 is disengaged from the first gear disc 9, and then the connecting rod 13 is rotated, and the connecting rod 13 will drive the missing gear 11 to rotate. After the missing gear 11 is rotated to disengage from the first gear 17, the rack 14 will be pushed to rotate under the action of the spring body 16, and the rack 14 will drive the first gear 17 to reverse, so that the connecting shaft 7 closes the valve, so that the valve can also be closed during a power outage to prevent waste of resources.

[0023] The supporting assembly includes a fixing ring 5, which is arranged on the bottom outer wall of the shell 4. The fixing ring 5 is connected to the shell 4 through an adjusting component. A plurality of push rods 8 are welded on the top of the fixing ring 5, and the push rods 8 pass through the shell 4. Balls 12 are arranged on the tops of the plurality of push rods 8, and the balls 12 are in contact with the missing gear 11. When the fixing ring 5 is moved downward by the adjusting component, the fixing ring 5 will drive the push rods 8 to move downward, and the push rods 8 will drive the balls 12 to move downward, and the missing gear 11 will no longer be supported.

[0024] In the utility model, the adjusting component is a threaded rod 6, which is rotatably connected to the bottom outer wall of the shell 4. The threaded rod 6 passes through the fixing ring 5 and is threadedly connected to the fixing ring 5. When the threaded rod 6 is rotated, the fixing ring 5 is driven to move downward by threaded engagement with the fixing ring 5. The top outer wall of the shell 4 is fixed with a protective shell 1 by bolts, and the motor is located in the protective shell 1. The protective shell 1 can protect the motor to prevent the motor from being damaged by collision with foreign objects. Multiple mounting holes are opened on both sides of the protective shell 1, and heat sinks 2 are welded in the multiple mounting holes. The heat sink 2 can dissipate the heat in the protective shell 1. One side of the multiple heat sinks 2 located on the same side is fixed with a protective plate 3 by bolts, and the protective plate 3 can protect the heat sink 2.

[0025] Working principle: when it is needed, connect the connecting shaft 7 to the valve, and then drive the first toothed disc 9 to rotate through the motor. At this time, since the first toothed disc 9 is engaged with the second toothed disc 10, the first toothed disc 9 will drive the second toothed disc 10 to rotate, and the second toothed disc 10 will drive the missing gear 11 to rotate, and the missing gear 11 will drive the first gear 17 to rotate, and the first gear 17 will drive the connecting shaft 7 to rotate, so as to open the valve. During the rotation, the first gear 17 will drive the rack 14 to move along the positioning column 15, and the rack 14 will squeeze the spring body 16. When the power is off, rotate the threaded rod 6, and the threaded rod 6 will drive the fixing ring 5 to move downward through the threaded engagement with the fixing ring 5. , the fixing ring 5 will drive the push rod 8 to move downward, and the push rod 8 will drive the ball 12 to move downward, and no longer support the missing gear 11. At this time, the missing gear 11 will move downward under the action of gravity, so that the second gear plate 10 will be disengaged from the first gear plate 9, and then the connecting rod 13 will be rotated, and the connecting rod 13 will drive the missing gear 11 to rotate. After the missing gear 11 is rotated to disengage from the first gear 17, the rack 14 will be pushed to rotate under the action of the spring body 16, and the rack 14 will drive the first gear 17 to reverse, so that the connecting shaft 7 will close the valve, so that the valve can also be closed during a power outage, preventing waste of resources and improving the use effect of the electric actuator.

[0026] The present invention has been described through the above-mentioned embodiments. Those skilled in the art will appreciate that the present invention is not limited to the above-mentioned embodiments, and more modifications may be made according to the teachings of the present invention. These modifications are all within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A spring return electric actuator, comprising a housing (4), characterized in that: The top outer wall of the housing (4) is fixedly connected to a motor, one end of the motor output shaft passes through the housing (4) and is fixedly connected to a first toothed disc (9), a rotating hole is provided at the bottom of the housing (4), a connecting rod (13) is provided in the rotating hole, the top of the connecting rod (13) is key-connected to a missing gear (11), the top of the missing gear (11) is fixedly connected to a second toothed disc (10), and the second toothed disc (10) is snap-fitted to the first toothed disc (9), a connecting shaft (7) is rotatably connected inside the housing (4), one end of the connecting shaft (7) passes through the housing (4), and the circular portion of the connecting shaft (7) is A first gear (17) is keyed to the outer wall, and the first gear (17) meshes with the missing gear (11); a positioning column (15) is fixedly connected to the inner wall of one side of the housing (4); a rack (14) is slidably connected to the outer side of the positioning column (15), and the rack (14) meshes with the first gear (17); a spring body (16) is sleeved on the outer side of the positioning column (15), and two ends of the spring body (16) are respectively fixed to the housing (4) and the first gear (17); a support assembly is provided on the top of the housing (4) to support the missing gear (11).

2. A spring return electric actuator according to claim 1, characterized in that: The support assembly comprises a fixing ring (5), the fixing ring (5) being arranged on the bottom outer wall of the shell (4), the fixing ring (5) being connected to the shell (4) via an adjusting component, a plurality of push rods (8) being fixedly connected to the top of the fixing ring (5), and the push rods (8) passing through the shell (4), and a ball (12) being arranged at the top end of each of the plurality of push rods (8).

3. A spring return electric actuator according to claim 2, characterized in that: The adjusting component is a threaded rod (6), the threaded rod (6) is rotatably connected to the bottom outer wall of the housing (4), and the threaded rod (6) passes through the fixing ring (5) and is threadedly connected to the fixing ring (5).

4. The spring return electric actuator according to claim 1, characterized in that: The top outer wall of the housing (4) is fixedly connected to a protective shell (1), and the motor is located inside the protective shell (1).

5. A spring return electric actuator according to claim 4, characterized in that: A plurality of mounting holes are provided on both sides of the protective shell (1), and a heat sink (2) is fixedly connected to each of the plurality of mounting holes.

6. A spring return electric actuator according to claim 5, characterized in that: A protective plate (3) is fixedly connected to one side of the plurality of heat dissipation plates (2) located on the same side.

7. The spring return electric actuator according to claim 1, characterized in that: The bottom end of the connecting rod (13) is fixedly connected with a knob for rotating the connecting rod (13).

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