A miniature electric actuator

Abstract

This utility model belongs to the field of electric actuators, specifically a miniature electric actuator. It includes an electric actuator with a detachable top cover. Both the top of the top cover and the bottom of the electric actuator have sliding grooves, and clips can be detachably installed in both grooves. A connecting base rotatably passes through the bottom of the electric actuator. The bottom of the connecting base has a slot, and a valve stem is located at the bottom of the connecting base. The valve stem is snapped into the inner side of the slot. A clamping shell is fixedly fitted onto the outer side of the connecting base, and a connecting mechanism is located on the inner side of the clamping shell. This utility model allows for the valve stem and electric actuator to be installed using the slot, and then further limited by multiple limiting racks to contact and limit the valve stem, thereby enhancing the tightness and stability of the connection. Simultaneously, in the event of slippage, the connecting mechanism can still drive the valve stem to rotate normally, thus increasing the durability of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of electric actuator technology, and in particular to a miniature electric actuator. Background Technology

[0002] The miniature electric actuator adopts an upper-mounted structure, which reduces the number of connecting bolts on the valve body under high pressure and large diameter conditions, enhances the reliability of the valve, and can overcome the influence of the system's own weight on the normal operation of the valve. The miniature electric actuator is widely used in pipelines of coal chemical, petrochemical, rubber, papermaking, pharmaceutical and other industries as a device for diverting or merging or switching the flow direction of the medium.

[0003] Miniature electric actuators are often connected to valve stems during use. However, after prolonged use, stripping or other issues can easily occur in the connection hole between the valve stem and the miniature electric actuator, causing the miniature electric actuator to be unable to control the valve stem and greatly affecting work efficiency.

[0004] Therefore, we propose a miniature electric actuator to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A miniature electric actuator includes an electric actuator with a detachable top cover. Both the top cover and both sides of the electric actuator have sliding grooves, and the same buckle can be detachably installed in both sliding grooves on the same side. A connecting base rotatably passes through the bottom of the electric actuator. A slot is formed at the bottom of the connecting base, and a valve stem is located at the bottom of the connecting base. The valve stem is snapped into the inner side of the slot. A clamping shell is fixedly fitted onto the outer side of the connecting base, and a connecting mechanism is provided on the inner side of the clamping shell.

[0007] Specifically, a gear set is detachably installed on the inner side of the electric actuator, and a motor is provided on the top of the gear set.

[0008] Specifically, a drive gear is fixedly installed on the top of the connecting base, and the output end of the gear set is adapted to the drive gear, so that the drive gear can be driven to rotate through the gear set.

[0009] Specifically, the top cover has movable grooves on both sides, and a limit spring is fixedly installed on the inner wall of one side of each movable groove. A limit metal block is slidably installed on the inner wall of the bottom of each movable groove. The other end of each limit spring is fixedly connected to the corresponding limit metal block, so that the two limit springs can drive the corresponding limit metal block to reset after being squeezed.

[0010] Specifically, the valve stem has multiple limiting grooves on its outer side.

[0011] Specifically, the bottom inner wall of the clamping housing is provided with multiple guide grooves to facilitate the movement of multiple limiting racks.

[0012] Specifically, the connecting mechanism includes a knob, a drive assembly, a flat threaded disc, multiple limiting racks, and multiple guide metal blocks. The flat threaded disc is rotatably mounted on the inner side of the clamping housing. The drive assembly is fixedly mounted on the top of the flat threaded disc. A knob is fixedly mounted on one side of the drive assembly. Guide metal blocks are slidably mounted on the inner sides of multiple guide grooves. Limiting racks are fixedly mounted on the tops of multiple guide metal blocks. Multiple limiting racks are adapted to the same flat threaded disc. Each of the multiple limiting racks has a protrusion on one side, and the protrusions are adapted to the corresponding limiting grooves to facilitate limiting the valve stem.

[0013] Specifically, the drive assembly includes a worm gear and a worm. The worm gear is rotatably mounted on the top inner wall of the clamping housing, and the worm is rotatably mounted on one side inner wall of the clamping housing. The worm gear and the worm mesh with each other, and the knob is fixedly connected to one end of the worm, so that the worm can be rotated by turning the knob.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: through the set connection mechanism, after the valve stem and electric actuator are installed using the slot, multiple limiting racks contact and limit the valve stem, thereby enhancing the tightness and stability of the connection. At the same time, in the event of slippage, the valve stem can be driven to rotate normally through the connection mechanism, thereby increasing the durability of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a miniature electric actuator proposed in this utility model;

[0016] Figure 2 This is a three-dimensional structural disassembly diagram of a miniature electric actuator proposed in this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of a limiting mechanism for a miniature electric actuator proposed in this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional view of the connection mechanism of a miniature electric actuator proposed in this utility model.

[0019] Figure 5 This is a three-dimensional structural disassembly diagram of the connection mechanism of a miniature electric actuator proposed in this utility model.

[0020] In the diagram: 1. Electric actuator; 2. Top cover; 3. Drive gear; 4. Motor; 5. Buckle; 6. Limit spring; 7. Limit metal block; 8. Connecting base; 9. Clamping housing; 10. Knob; 11. Worm gear; 12. Worm; 13. Flat threaded disc; 14. Limit rack; 15. Guide metal block; 16. Valve stem; 17. Limit groove; 18. Guide groove; 19. Gear set. Detailed Implementation

[0021] Reference Figure 1-5 A miniature electric actuator includes an electric actuator 1. A top cover 2 is detachably installed on the top of the electric actuator 1. Slide grooves are provided on both sides of the top cover 2 and the electric actuator 1. The same buckle 5 can be detachably installed in the two slide grooves on the same side. A connecting base 8 is rotatably passed through the bottom of the electric actuator 1. A hole groove is provided on the bottom of the connecting base 8. A valve stem 16 is provided on the bottom of the connecting base 8. The valve stem 16 is snapped into the inside of the hole groove. A clamping shell 9 is fixedly sleeved on the outside of the connecting base 8. A connecting mechanism is provided on the inside of the clamping shell 9.

[0022] In this embodiment, a gear set 19 is detachably installed on the inner side of the electric actuator 1, and a motor 4 is provided on the top of the gear set 19.

[0023] In this embodiment, a drive gear 3 is fixedly installed on the top of the connecting base 8, and the output end of the gear set 19 is adapted to the drive gear 3, so that the drive gear 3 can be driven to rotate by the gear set 19.

[0024] In this embodiment, both sides of the top cover 2 are provided with movable grooves. Limiting springs 6 are fixedly installed on the inner wall of one side of each of the two movable grooves. Limiting metal blocks 7 are slidably installed on the inner wall of the bottom of each of the two movable grooves. The other ends of the two limiting springs 6 are fixedly connected to the corresponding limiting metal blocks 7, so that the two limiting springs 6 can drive the corresponding limiting metal blocks 7 to reset after being squeezed.

[0025] In this embodiment, a plurality of limiting grooves 17 are provided on the outer side of the valve stem 16.

[0026] In this embodiment, multiple guide grooves 18 are provided on the bottom inner wall of the clamping housing 9 to facilitate the movement of multiple limiting racks 14.

[0027] In this embodiment, the connecting mechanism includes a knob 10, a drive assembly, a flat threaded disc 13, multiple limiting racks 14, and multiple guide metal blocks 15. The flat threaded disc 13 is rotatably mounted on the inner side of the clamping housing 9. The drive assembly is fixedly mounted on the top of the flat threaded disc 13. The knob 10 is fixedly mounted on one side of the drive assembly. The guide metal blocks 15 are slidably mounted on the inner side of multiple guide grooves 18. The limiting racks 14 are fixedly mounted on the top of multiple guide metal blocks 15. The multiple limiting racks 14 are all adapted to the same flat threaded disc 13. Each of the multiple limiting racks 14 has a protrusion on one side. The multiple protrusions are respectively adapted to the corresponding limiting grooves 17 to facilitate the limiting of the valve stem 16.

[0028] In this embodiment, the drive assembly includes a worm gear 11 and a worm 12. The worm gear 11 is rotatably mounted on the top inner wall of the clamping housing 9, and the worm 12 is rotatably mounted on one side inner wall of the clamping housing 9. The worm gear 11 and the worm 12 mesh with each other. The knob 10 is fixedly connected to one end of the worm 12, and the worm 12 can be rotated by the knob 10.

[0029] Working principle: In use, the operator first assembles and debugs the motor 4 and gear set 19 in the electric actuator 1, then closes the top cover 2, installs the two latches 5 in the corresponding two sliding grooves, and then pushes the two latches 5. One side of the two latches 5 presses against the corresponding limiting metal block 7, causing it to slide inward. After the two latches 5 move to the designated position, they no longer press against the limiting metal block 7. The two limiting metal blocks 7 are reset by the rebound force of the corresponding limiting spring 6, thus limiting the two latches 5. After completing the initial limiting, the operator fixes the electric actuator 1 and the top cover 2 with bolts to ensure that they will not detach. Then, the slot on the connecting base 8 at the bottom of the electric actuator 1 is engaged with the valve stem 16. After connection, the operator manually rotates knob 10. Rotation of knob 10 drives worm gear 12 to rotate, which in turn drives worm wheel 11 to rotate. Rotation of worm wheel 11 drives planar threaded disc 13 to rotate. Rotation of planar threaded disc 13 drives multiple limiting racks 14 to move closer to each other. Each limiting rack 14 has a guide metal block 15 fixedly installed at its bottom. The guide metal blocks 15 are slidably installed in their respective guide grooves 18. Therefore, the movement trajectory of the guide metal blocks 15 and the limiting racks 14 is restricted, and they can only move back and forth. Each limiting rack 14 has a limiting protrusion. The limiting protrusions move closer to each other and slide into their respective limiting grooves 17 to complete the limiting. At this time, if slippage occurs, the connecting mechanism can still ensure that the valve stem 16 rotates stably.

[0030] The technological advancement of this invention compared to the prior art is that after the valve stem 16 and the electric actuator 1 are installed using slots, multiple limiting racks 14 can then contact and limit the valve stem 16, thereby enhancing the tightness and stability of the connection. At the same time, in the event of slippage, the valve stem 16 can be rotated normally through the connecting mechanism, thus increasing the durability of the equipment.

Claims

1. A micro electric actuator, characterized by, Includes an electric actuator (1), the top of which is detachably mounted with a top cover (2), and both sides of the top cover (2) and the electric actuator (1) are provided with sliding grooves, and the same buckle (5) can be detachably mounted in the two sliding grooves on the same side. The bottom of the electric actuator (1) is rotatably connected to a connecting base (8). The bottom of the connecting base (8) is provided with a slot. The bottom of the connecting base (8) is provided with a valve stem (16). The valve stem (16) is snapped into the inside of the slot. The outside of the connecting base (8) is fixedly fitted with a clamping shell (9). The inside of the clamping shell (9) is provided with a connecting mechanism. The clamping housing (9) has multiple guide grooves (18) on its bottom inner wall. The connecting mechanism includes a knob (10), a drive assembly, a flat threaded disc (13), multiple limiting racks (14) and multiple guide metal blocks (15). The flat threaded disc (13) is rotatably mounted on the inner side of the clamping housing (9). The drive assembly is fixedly mounted on the top of the flat threaded disc (13). The knob (10) is fixedly mounted on one side of the drive assembly. The guide metal blocks (15) are slidably mounted on the inner side of the multiple guide grooves (18). The limiting racks (14) are fixedly mounted on the top of the multiple guide metal blocks (15). The multiple limiting racks (14) are all adapted to the same flat threaded disc (13). The multiple limiting racks (14) have a protrusion on one side. The multiple protrusions are adapted to the corresponding limiting grooves (17). The drive assembly includes a worm gear (11) and a worm (12). The worm gear (11) is rotatably mounted on the top inner wall of the clamping housing (9), and the worm (12) is rotatably mounted on one side inner wall of the clamping housing (9). The worm gear (11) meshes with the worm (12), and the knob (10) is fixedly connected to one end of the worm (12).

2. A micro-electric actuator according to claim 1, wherein The electric actuator (1) has a gear set (19) detachably installed on its inner side, and a motor (4) is provided on the top of the gear set (19).

3. A micro-electric actuator according to claim 2, wherein The top of the connecting base (8) is fixedly installed with a drive gear (3), and the output end of the gear set (19) is adapted to the drive gear (3).

4. A micro-electric actuator according to claim 1, wherein The top cover (2) has movable slots on both sides. Limiting springs (6) are fixedly installed on the inner wall of one side of each movable slot. Limiting metal blocks (7) are slidably installed on the inner wall of the bottom of each movable slot. The other ends of the two limiting springs (6) are fixedly connected to the corresponding limiting metal blocks (7).

5. A miniature electric actuator according to claim 1, characterized in that, The valve stem (16) has multiple limiting grooves (17) on its outer side.

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