CN222185977U

CN222185977U - A micro valve electric actuator

Info

Publication number: CN222185977U
Application number: CN202420139870.6U
Authority: CN
Inventors: 林凤铖; 卢可产; 童加伟
Original assignee: Eltorque Automation Xiamen Co ltd
Current assignee: Eltorque Automation Xiamen Co ltd
Priority date: 2024-01-19
Filing date: 2024-01-19
Publication date: 2024-12-17
Anticipated expiration: 2034-01-19

Abstract

The utility model discloses a miniature valve electric actuator which comprises a shell, a driving motor fixed in the shell, an output shaft rotationally arranged in the shell and a planetary gear reduction mechanism connected with the driving motor and the output shaft. The planetary gear speed reducing mechanism comprises a planet carrier, a first annular gear, a second annular gear, a sun gear and a plurality of duplex planetary gears. The planet carrier is rotatably supported on the output shaft. The double planetary gears are rotatably connected to the planetary frame and comprise small planetary gears and large planetary gears which are coaxially fixed in sequence from the output shaft to the driving motor. The first annular gear is fixedly connected with the output shaft and meshed with each pinion gear. The second ring gear is meshed with each large planetary gear. The sun gear is connected with the motor output shaft of the driving motor and meshed with each large planetary gear. The utility model has compact structure, less parts and small whole volume, and is beneficial to realizing the whole miniaturization and light weight of the electric actuator.

Description

Miniature valve electric actuator

Technical Field

The utility model relates to the technical field of electric actuators, in particular to a miniature valve electric actuator.

Background

The electric valve is an important device in an industrial automation control system, and can accurately regulate and control the flow and pressure of fluid, so that the stability and high efficiency of an industrial production process are ensured. The core component of the electric valve is an actuator which can convert an electric signal into mechanical motion so as to control the opening and closing of the valve. The electric actuator has the core components of a motor and a speed reducer, and when the electric drive motor is started, the speed reducer is driven to transmit power to the valve main body, so that the valve main body is opened or closed.

The planetary gear reducer has wide application, and the primary planetary transmission or the secondary planetary transmission is high in use. The utility model discloses a solar pipeline emptying device, which is provided with an emptying valve arranged in a solar hot water pipeline, and comprises a controller for controlling the emptying valve to be opened and closed, wherein the controller comprises a reduction gearbox body, a first-stage planetary gear speed reducing mechanism, a second-stage planetary gear speed reducing mechanism, an input shaft connected with a motor and an output shaft connected with the emptying valve in the solar hot water pipeline are arranged in the reduction gearbox body, the first-stage planetary gear speed reducing mechanism is sleeved on the input shaft, the first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear, a first-stage gear ring, a first-stage planetary carrier and a first-stage sun gear sleeved on the input shaft, the first-stage gear ring is fixedly connected with the reduction gearbox body, the second-stage planetary gear speed reducing mechanism comprises an intermediate transmission shaft, a second-stage sun gear sleeved on the intermediate transmission shaft, a second-stage gear ring gear and a second-stage planetary carrier, the second-stage planetary carrier is fixedly connected with the reduction gearbox body, the intermediate transmission shaft is fixedly arranged at the center of the first-stage planetary carrier, and the second-stage gear ring gear is connected with the output shaft through a connecting turntable. The traditional two-stage planetary transmission relates to more spare and accessory parts, is more complicated in structural design, uses the ratio less, and the planet carrier is single part mostly, causes more parts, and overall structure is great, and is compact inadequately, is unfavorable for realizing holistic miniaturization and the lightweight of electric actuator.

Disclosure of utility model

The utility model aims to provide an external micro valve electric actuator, which solves the technical problems of more parts, larger overall structure, more complex structure and insufficient compactness of the traditional two-stage planetary transmission actuator.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

The miniature valve electric actuator comprises a shell, a driving motor fixed in the shell, an output shaft rotationally arranged in the shell, and a planetary gear reduction mechanism connected with the driving motor and the output shaft. The planetary gear speed reducing mechanism comprises a planet carrier, a first annular gear, a second annular gear, a sun gear and a plurality of duplex planetary gears. The planet carrier is rotatably supported on the output shaft. The double planetary gears are rotatably connected to the planetary frame and comprise small planetary gears and large planetary gears which are coaxially fixed in sequence from the output shaft to the driving motor. The first annular gear is fixedly connected with the output shaft and meshed with each pinion gear. The second ring gear is meshed with each large planetary gear. The sun gear is connected with the motor output shaft of the driving motor and meshed with each large planetary gear.

Preferably, the planet carrier comprises a retainer, a supporting ring, a plurality of T-shaped guide shafts, a plurality of first bearings and a plurality of shaft check rings. The retainer is rotatably supported on the output shaft, and a plurality of step holes which are circumferentially distributed are formed in the retainer from one side end face of the retainer. The supporting ring is fixed on the end surface of the other side of the retainer and provided with a plurality of jacks of Xiang Paibu. One end of the T-shaped guide shaft is limited in the step hole, and the other end of the T-shaped guide shaft penetrates through the step hole and is inserted into the jack. A first bearing is assembled on the T-shaped guide shaft between the retainer and the support ring, and the first bearing is used for assembling the duplex planetary gear. And each T-shaped guide shaft is clamped with a shaft check ring for axially limiting the first bearing and the T-shaped guide shaft.

Preferably, the output shaft is fixedly sleeved with a flange plate, the first annular gear is fixedly connected with the output shaft through the flange plate, and the planet carrier and the sun gear are both rotatably supported on the output shaft.

Preferably, the sun gear is connected to the motor output shaft of the drive motor via a non-return device.

Preferably, the first inner gear ring is sleeved and fixed with a switch position display ring, and the shell is provided with a transparent window matched with the switch position display ring.

Preferably, the drive motor has a manual input shaft coaxially connected to the motor output shaft, the manual input shaft extending beyond the housing to connect to the hand wheel, the housing being fitted with a shield covering the hand wheel.

Preferably, a driving controller is fixed in the shell and is electrically connected with the driving motor.

Preferably, a plastic gear is fixed on the output shaft, an encoder feedback mechanism matched with the plastic gear is fixed in the shell, and the encoder feedback mechanism is electrically connected with the driving controller.

Preferably, the shell comprises an outer cover with two open ends, a base assembled at the opening of one end of the outer cover, a transparent window assembled between the base and the outer cover in a sealing manner, an upper cover assembled at the opening of the other end of the outer cover in a sealing manner, and a bracket fixedly connected to the inner side of the base. The base is provided with an output shaft hole, and the output shaft is rotatably supported in the output shaft hole through a second bearing. The upper cover is provided with an input shaft hole, and the manual input shaft extends out of the input shaft hole. The second annular gear is fixed on one side end face of the support towards the base, the driving motor is fixed on one side end face of the support towards the upper cover, and the encoder feedback mechanism is fixed on the side face of the support. The driving controller is fixed on the inner side of the upper cover.

Preferably, the side opening of the outer cover is provided with a side cover for sealing the opening and for connecting the cable, and a plurality of plugs are arranged on the side cover.

Preferably, a first oil seal is arranged between the output shaft hole and the output shaft, and a second oil seal is arranged between the input shaft hole and the manual input shaft.

By adopting the technical scheme, the miniature valve electric actuator has the beneficial effects that the miniature valve electric actuator adopts the secondary planetary gear reduction mechanism, compared with the primary planetary transmission mechanism, the miniature valve electric actuator can more finely control the rotation position of the output shaft, further can more accurately control the opening and closing angles of the valve, and compared with the traditional secondary planetary transmission mechanism, the miniature valve electric actuator is simpler and more compact in connection and assembly, fewer and more simplified in required parts and smaller in overall size, and is beneficial to realizing the overall miniaturization and light weight of the electric actuator.

Drawings

Fig. 1 is a schematic perspective view of a micro valve electric actuator according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic diagram of the explosive structure of fig. 1.

Fig. 3 is a schematic view of fig. 1 in semi-section.

Fig. 4 is a schematic front view of a planetary gear reduction mechanism of the micro valve electro-actuator of fig. 1.

Fig. 5 is a schematic top view of the planetary gear reduction mechanism of fig. 4.

Fig. 6 is an exploded view of the planetary gear reduction mechanism of fig. 4.

Fig. 7 is a schematic diagram of the planetary gear reduction mechanism of fig. 4 in semi-section.

The novel gear type motor comprises a housing, a driving motor, a driving shaft, a planet carrier, a double planetary gear, a small planetary gear, a large planetary gear, a first annular gear, a second annular gear, a sun gear, a motor output shaft, a retainer, a step hole, a supporting ring, a jack, a 16T-shaped guide shaft, a first bearing, a shaft retainer, a flange, a non-return device, a switch position display ring, a transparent window, a transparent shaft, a manual input shaft, a hand wheel, a protective cover and a driving controller, a plastic gear, a coder feedback mechanism, a housing, a cover, a base, a cover, a support, a second bearing, a third bearing, a side cover, a plug and a first oil seal and a second oil seal.

Detailed Description

The utility model will be further described with reference to the drawings and detailed description.

As shown in fig. 1 to 7, the micro valve electric actuator of the present embodiment includes a housing 1, a driving motor 2, an output shaft 3, a planetary gear reduction mechanism, a backstop 20, a switch position display ring 21, a driving controller 26, a plastic gear 27, and an encoder feedback mechanism 28 which are installed in the housing 1.

The casing 1 includes a housing 29, a base 30, an upper cover 31, a bracket 32, a transparent window 22, and a side cover 35. The two ends of the outer cover 29 are open, the base 30 is assembled at the opening of one end of the outer cover 29 through screws, the transparent window 22 is clamped and fixed between the outer cover 29 and the base 30, sealing rings are arranged between the transparent window 22 and the base 30 and between the transparent window 22 and the outer cover 29, the side face of the outer cover 29 is open and is provided with a side cover 35 with sealing openings through screw assembly, the sealing rings are arranged between the side cover 35 and the outer cover 29, the side cover 35 is provided with a plurality of plugs 36, and the plugs 36 can be taken down to install a waterproof joint according to requirements in actual use. The upper cover 31 is assembled at the opening of the other end of the outer cover 29 by screws, and a sealing ring is arranged between the outer cover 29 and the upper cover 31. The bracket 32 is assembled inside the base 30 by screws. The base 30 is provided with an output shaft hole, and the upper cover 31 is provided with an input shaft hole. The housing 1 of this embodiment facilitates the assembly of the parts therein, has good sealing performance, and can be waterproof and dustproof.

The output shaft 3 is rotatably supported in the output shaft hole through the second bearing 33, and a first oil seal 37 for sealing a gap between the output shaft hole and the output shaft 3 is fitted over the output shaft 3. The output shaft 3 is sleeved and fixed with a flange 19 positioned on the inner side of the base 30.

The planetary gear speed reducing mechanism comprises a planet carrier 4, a first annular gear 8, a second annular gear 9, a sun gear 10 and a plurality of duplex planetary gears 5. The first annular gear 8 is sleeved on the output shaft 3 and is fixedly connected with the flange 19 through screws so as to realize synchronous rotation of the first annular gear 8 and the output shaft 3. The planet carrier 4 is rotatably supported on the output shaft 3, three circumferentially arranged duplex planet gears 5 are arranged on the planet carrier 4, and the duplex planet gears 5 are rotatably arranged on the planet carrier 4. The double planetary gear 5 comprises a small planetary gear 6 and a large planetary gear 7 which are integrally formed and coaxially connected. The three pinion gears 6 are each meshed with the first ring gear 8. The second annular gear 9 is sleeved on the output shaft 3 and fixed on the end face of one side of the support 32, which faces the base 30, through screws, and the second annular gear 9 is meshed with the three large planet gears 7. The sun gear 10 is rotatably supported on the output shaft 3 by a third bearing 34, the sun gear 10 meshing with the three large planet gears 7. The driving motor 2 is fixed on one side end face of the bracket 32 facing the upper cover 31, the driving motor 2 is provided with a motor output shaft 11 and a manual input shaft 23 which are coaxially connected, the motor output shaft 11 is connected with the sun gear 10 through the backstop 20, and the manual input shaft 23 extends out of the input shaft hole to be connected with the hand wheel 24. The hand wheel 24 can be used for manually controlling the opening and closing of the valve under the condition of power failure and the like. In order to avoid that the accuracy of the switch valve is affected by the false collision, a detachably connected protective cover 25 is arranged on the shell 1 to protect the hand wheel 24. In order to improve the sealing performance, a second oil seal 38 for sealing the gap between the input shaft hole and the manual input shaft 23 is sleeved on the manual input shaft 23.

For ease of assembly, the planet carrier 4 of the present embodiment comprises a cage 12, a support ring 14, three T-shaped guide shafts 16, six first bearings 17 and three shaft collars 18. The holder 12 is rotatably supported on the output shaft 3, and the holder 12 is provided with three stepped holes 13 circumferentially arranged from one side end face thereof. The support ring 14 is fixed on the other end face of the retainer 12, and is provided with three circumferentially arranged insertion holes 15. The T-shaped guide shaft 16 penetrates through the step hole 13 from one end side surface of the retainer 12 to the other end of the T-shaped guide shaft 16 to be axially limited in the step hole 13, two first bearings 17 are assembled on the T-shaped guide shaft 16 and clamped and limited by the shaft retainer ring 18, meanwhile, the T-shaped guide shaft 16 is axially limited, the insertion hole 15 is aligned with the T-shaped guide shaft 16, the supporting ring 14 is fixed on the other end surface of the retainer 12 by using a screw, and two ends of the T-shaped guide shaft 16 are respectively supported on the retainer 12 and the supporting ring 14.

The switch position display ring 21 is clamped and fixed on the first annular gear 8 by a plunger radially inserted in the flange 19 and synchronously rotates along with the first annular gear 8. The switch position shows that the outer surface of the ring 21 is engraved with OPEN, CLOSE marks in the circumferential direction. The switch position display ring 21 is opposite to the transparent window 22, and the switch state of the valve can be intuitively known by observing the switch position display ring 21 through the transparent window 22.

The plastic gear 27 is coaxially fixed to the output shaft 3, the encoder feedback mechanism 28 is fixed to the side face of the bracket 32, and the encoder feedback mechanism 28 feeds back the position, the angular velocity through the plastic gear 27. The drive controller 26 is fixed inside the upper cover 31, which is electrically connected to the drive motor 2 and the encoder feedback mechanism 28. The electric actuator of this embodiment can realize modularized assembly, can regard base 30, output shaft 3, plastic gear 27, switch position display ring 21, first ring gear 8, planet carrier 4, duplex planetary gear 5 and sun gear 10 as an assembly module, regard support 32, second ring gear 9, encoder feedback mechanism 28, driving motor 2 and non-return device 20 as an assembly module, regard driving controller 26 and upper cover 31 as an assembly module, assemble each assembly module first and then carry out subsequent whole assembly to reduce the assembly degree of difficulty, improve assembly efficiency.

The micro valve electric actuator of this embodiment controls the driving motor 2 to work through the driving controller 26, the driving motor 2 drives the sun gear 10 to rotate, the sun gear 10 drives the large planetary gear 7 to rotate, meanwhile, the small planetary gear 6 drives the first annular gear 8 to rotate, the first annular gear 8 is fixed on the output shaft 3, the output shaft 3 rotates at the same time, and the output shaft 3 is used for being connected with a valve to control the opening and closing of the valve. Compared with the traditional secondary planetary transmission mechanism, the miniature valve electric actuator provided by the embodiment omits a secondary sun gear, an intermediate transmission shaft, a secondary planet carrier and the like, is more compact in structure, more simplified, smaller in whole size and beneficial to achieving overall miniaturization and light weight of the electric actuator.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The miniature valve electric actuator is characterized by comprising a shell (1), a driving motor (2) fixed in the shell (1), an output shaft (3) rotationally arranged in the shell (1), and a planetary gear reduction mechanism connected with the driving motor (2) and the output shaft (3);

The planetary gear reduction mechanism includes:

a carrier (4) rotatably supported by the output shaft (3);

The double planetary gears (5) are rotationally connected to the planet carrier (4), and the double planetary gears (5) comprise small planetary gears (6) and large planetary gears (7) which are coaxially fixed in sequence from the output shaft (3) to the driving motor (2);

The first annular gear (8) is fixedly connected with the output shaft (3) and meshed with each small planetary gear (6);

a second ring gear (9) meshed with each of the large planetary gears (7);

And a sun gear (10) connected with a motor output shaft (11) of the driving motor (2) and meshed with each large planetary gear (7).

2. The micro valve electric actuator according to claim 1, wherein the planet carrier (4) comprises:

The retainer (12) is rotatably supported on the output shaft (3), and a plurality of step holes (13) which are circumferentially distributed are formed in the retainer (12) from one side end surface of the retainer;

The support ring (14) is fixed on the end surface of the other side of the retainer (12) and is provided with a plurality of jacks (15) with a circumference Xiang Paibu;

One end of each T-shaped guide shaft (16) is limited in each step hole (13), and the other end of each T-shaped guide shaft (16) penetrates through each step hole (13) and is inserted into each jack (15);

A plurality of first bearings (17) are assembled on a T-shaped guide shaft (16) between the retainer (12) and the support ring (14), and the first bearings (17) are used for assembling the duplex planetary gears (5);

and the shaft check rings (18) are clamped on the T-shaped guide shaft (16) and used for axially limiting the first bearing (17) and the T-shaped guide shaft (16).

3. The miniature valve electric actuator of claim 1, characterized in that the output shaft (3) is fixedly sleeved with a flange plate (19), the first annular gear (8) is fixedly connected with the output shaft (3) through the flange plate (19), and the planet carrier (4) and the sun gear (10) are both rotatably supported on the output shaft (3).

4. The micro valve electric actuator according to claim 1, wherein the sun gear (10) is connected to a motor output shaft (11) of the drive motor (2) via a non-return device (20).

5. The micro valve electric actuator according to any one of claims 1-4, wherein the first ring gear (8) is sleeved and fixed with a switch position display ring (21), and the housing (1) is provided with a transparent window (22) matched with the switch position display ring (21).

6. The micro valve electric actuator according to claim 5, wherein the driving motor (2) has a manual input shaft (23) coaxially connected to the motor output shaft (11), the manual input shaft (23) extends out of the housing (1) to connect with the hand wheel (24), and the housing (1) is equipped with a protective cover (25) covering the hand wheel (24).

7. The electrically operated micro valve actuator of claim 6, further comprising a drive controller (26) fixed within the housing (1), said drive controller (26) being electrically connected to the drive motor (2).

8. The micro valve electric actuator of claim 7, further comprising a plastic gear (27) and an encoder feedback mechanism (28) cooperating with the plastic gear (27), wherein the plastic gear (27) is coaxially fixed on the output shaft (3), and wherein the encoder feedback mechanism (28) is fixed in the housing (1) and electrically connected with the drive controller (26).

9. The micro valve electric actuator according to claim 8, wherein the housing (1) comprises a housing (29) with two open ends, a base (30) assembled at one open end of the housing (29), a transparent window (22) assembled between the base (30) and the housing (29) in a sealing manner, an upper cover (31) assembled at the other open end of the housing (29) in a sealing manner, and a bracket (32) fixedly connected to the inner side of the base (30);

The base (30) is provided with an output shaft hole, the output shaft (3) is rotatably supported in the output shaft hole through a second bearing (33), the upper cover (31) is provided with an input shaft hole, the manual input shaft (23) extends out of the input shaft hole, the second annular gear (9) is fixed on one side end face of the support (32) facing the base (30), the driving motor (2) is fixed on one side end face of the support (32) facing the upper cover (31), the encoder feedback mechanism (28) is fixed on the side face of the support (32), and the driving controller (26) is fixed on the inner side of the upper cover (31).

10. The micro valve electric actuator according to claim 9, wherein the lateral opening of the housing (29) is provided with a side cover (35) for sealing the opening and connecting cables, the side cover (35) is provided with a plurality of plugs (36), a first oil seal (37) is arranged between the output shaft hole and the output shaft (3), and a second oil seal (38) is arranged between the input shaft hole and the manual input shaft (23).