CN112212055A

CN112212055A - Actuator

Info

Publication number: CN112212055A
Application number: CN201910621972.5A
Authority: CN
Inventors: 俞舟; 康志军
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2021-01-12

Abstract

The present invention provides an actuator comprising: the first worm and the first worm wheel are in driving connection; the second worm and the second worm wheel are in driving connection, the second worm is connected with the first worm wheel, the second worm and the first worm wheel are coaxially arranged, and the second worm and the first worm are vertically arranged; the driving part is in driving connection with the first worm; the output shaft is connected with the second turbine and is coaxially arranged with the second turbine; and a first positioning portion for positioning the driving portion. Through the technical scheme provided by the invention, the problems of large volume and inconvenient assembly of the actuator in the prior art can be solved.

Description

Actuator

Technical Field

The invention relates to the technical field of actuators, in particular to an actuator.

Background

The actuator speed reducing mechanism in the prior art is complex, uses a plurality of gears for speed reduction, and has a non-compact structure and a larger volume.

Disclosure of Invention

The invention provides an actuator, which aims to solve the problem of large volume of the actuator in the prior art.

In order to solve the above problems, the present invention provides an actuator including: the first worm and the first worm wheel are in driving connection; the second worm and the second worm wheel are in driving connection, the second worm is connected with the first worm wheel, the second worm and the first worm wheel are coaxially arranged, and the second worm and the first worm are vertically arranged; the driving part is in driving connection with the first worm; the output shaft is connected with the second turbine and is coaxially arranged with the second turbine; and a first positioning portion for positioning the driving portion.

Further, the actuator further comprises a first shell and a second shell which are connected with each other, and the first worm, the first worm wheel, the second worm wheel, the driving part, the output shaft and the first positioning part are arranged between the first shell and the second shell.

Further, the first positioning portion includes: the first positioning block is arranged on the second shell; the second locating piece, the second locating piece can be dismantled with first locating piece and be connected, has first locating slot on the second locating piece, the lateral wall butt of the lateral wall in first locating slot and drive division.

Further, the first positioning portion further includes: the locating plate sets up on first casing, has the second constant head tank on the locating plate, the lateral wall butt of the lateral wall of second constant head tank and drive division.

Further, the actuator further comprises: and the circuit board is arranged between the first shell and the second shell, and the driving part is electrically connected with the circuit board.

Further, the actuator further comprises: the angle sensor is arranged on the circuit board, and the first end of the output shaft is connected with the angle sensor.

Further, the first end of output shaft passes circuit board and angle sensor, and the first end of output shaft has spacing plane, spacing plane and the spacing cooperation of angle sensor.

Further, the output shaft passes through the through hole on the second turbine, has on the inner wall of through hole and carries out spacing groove to the circumference of output shaft.

Further, the second end of output shaft wears to establish in the diapire of second casing, and the executor still includes: the axle sleeve sets up on the roof of first casing, and the first end of output shaft is worn to establish in the axle sleeve.

Further, the actuator further comprises: and the second positioning part is arranged between the first shell and the second shell and is used for positioning the second worm.

Further, the second positioning portion comprises a third positioning block, a fourth positioning block, a fifth positioning block and a sixth positioning block, wherein the third positioning block and the fourth positioning block are arranged on the first shell, the fifth positioning block and the sixth positioning block are arranged on the second shell, the third positioning block and the fifth positioning block are correspondingly arranged, the fourth positioning block and the sixth positioning block are correspondingly arranged, one end of the second worm is arranged in a cavity between the third positioning block and the fifth positioning block, and the other end of the second worm is arranged in the cavity between the fourth positioning block and the sixth positioning block.

Further, the periphery of the first shell is connected with the periphery of the second shell, and the actuator further comprises: the first positioning column is arranged on the first shell; and the second positioning column is arranged on the second shell and is connected with the first positioning column in a matching manner.

By applying the technical scheme of the invention, the actuator is provided with the first worm and the first worm wheel which are in driving connection, and the second worm wheel which are in driving connection, so as to realize the speed reduction of the driving part and the driving connection of the driving part and the output shaft. Moreover, positioning and assembling of the driving portion can be facilitated by providing the first positioning portion.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic structural diagram of an actuator provided by an embodiment of the present invention;

FIG. 2 shows an assembly view of the second housing of FIG. 1 with a portion of the components;

FIG. 3 shows a cross-sectional view of the actuator of FIG. 1;

FIG. 4 shows another cross-sectional view of the actuator of FIG. 1;

FIG. 5 shows a schematic structural view of the second turbine of FIG. 1;

FIG. 6 shows a schematic view of the second positioning block of FIG. 1;

fig. 7 shows a schematic structural view of the first housing in fig. 1.

Wherein the figures include the following reference numerals:

11. a first worm; 12. a first turbine; 13. a second worm; 14. a second turbine; 141. a limiting groove; 20. a drive section; 31. an output shaft; 311. a limiting plane; 32. a shaft sleeve; 33. a seal ring; 41. a first housing; 42. a second housing; 51. a circuit board; 52. an angle sensor; 53. a wire harness; 61. a third positioning block; 62. a fourth positioning block; 63. a fifth positioning block; 64. a sixth positioning block; 71. a first positioning block; 72. a second positioning block; 721. a first positioning groove; 73. positioning a plate; 731. a second positioning groove; 81. a first positioning post; 82. and a second positioning column.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 7, an embodiment of the present invention provides an actuator including: a first worm 11 and a first worm wheel 12 which are in driving connection; the second worm 13 and the second worm wheel 14 are in driving connection, the second worm 13 is connected with the first worm wheel 12, the second worm 13 and the first worm wheel 12 are coaxially arranged, and the second worm 13 and the first worm 11 are vertically arranged; a driving part 20 which is in driving connection with the first worm 11; and an output shaft 31 connected to the second turbine 14, the output shaft 31 being disposed coaxially with the second turbine 14.

By applying the technical scheme of the embodiment, the actuator is provided with the first worm 11 and the first worm wheel 12 which are in driving connection, and the second worm 13 and the second worm wheel 14 which are in driving connection, so as to realize the speed reduction of the driving part 20 and the driving connection of the driving part 20 and the output shaft 31. The actuator may act as a water valve actuator. Also, positioning and assembling of the driving part 20 can be facilitated by providing the first positioning part.

In the present embodiment, the actuator further includes a first housing 41 and a second housing 42 connected to each other, and the first worm 11, the first worm wheel 12, the second worm 13, the second worm wheel 14, the driving portion 20, the output shaft 31, and the first positioning portion are disposed between the first housing 41 and the second housing 42. The first housing 41 and the second housing 42 protect the first worm 11, the first worm wheel 12, the second worm 13, the second worm wheel 14, the drive unit 20, the output shaft 31, the first positioning unit, and the like.

Specifically, the first positioning portion includes: a first positioning block 71 provided on the second housing 42; the second positioning block 72, the second positioning block 72 and the first positioning block 71 are detachably connected, the second positioning block 72 has a first positioning groove 721, and a side wall of the first positioning groove 721 is abutted to a side wall of the driving portion 20. In this way, the driving unit 20 can be positioned by the first positioning groove 721 of the second positioning block 72. The second positioning block 72 can be fixed by the first positioning block 71. The first positioning block 71 and the second positioning block 72 may be connected by screws.

Further, the second positioning block 72 has a step, the step is in positioning fit with the first positioning block 71, and the bottom wall of the first positioning groove 721 abuts against the end face of the driving portion 20. Thus, the second positioning block 72 can position the driving part 20 in the radial and axial directions, facilitating assembly and improving reliability.

As shown in fig. 7, the first positioning portion further includes: and a positioning plate 73 disposed on the first housing 41, wherein the positioning plate 73 has a second positioning slot 731, and a sidewall of the second positioning slot 731 abuts against a sidewall of the driving portion 20. The driving portion 20 can be further positioned by the positioning plate 73 to improve stability. In the present embodiment, the positioning plate 73 has two spaced apart positions.

In this embodiment, the actuator further includes: and a circuit board 51 disposed between the first case 41 and the second case 42, and the driving part 20 is electrically connected to the circuit board 51. The drive unit 20 is controllable via the circuit board 51 and can also receive and process further information. Specifically, the driving part 20 is a motor, and the motor is connected to the circuit board 51 through a wire harness 53. The circuit board 51 has an avoiding groove for avoiding the first turbine 12, which makes the actuator more compact.

In this embodiment, the actuator further includes: and an angle sensor 52 arranged on the circuit board 51, wherein the first end of the output shaft 31 is connected with the angle sensor 52. The rotation angle of the output shaft 31 can be accurately measured by the angle sensor 52, which facilitates control of the rotation angle of the output shaft 31 to open or close the valve.

Specifically, a first end of the output shaft 31 passes through the circuit board 51 and the angle sensor 52, the first end of the output shaft 31 has a limit plane 311, and the limit plane 311 is in limit fit with the angle sensor 52. The output shaft 31 and the rotor of the angle sensor 52 can be fixed in the circumferential direction by the limit plane 311. The first end of the output shaft 31 may be made of a cylindrical shaft with a portion of material removed, and the first end of the output shaft 31 may have a D-shaped cross-section.

As shown in fig. 5, in the present embodiment, the output shaft 31 passes through a through hole in the second turbine 14, and a limiting groove 141 for limiting the circumferential direction of the output shaft 31 is formed on an inner wall of the through hole. With the above arrangement, the assembly of the output shaft 31 and the second turbine 14 can be facilitated.

As shown in fig. 3, the second end of the output shaft 31 is rotatably disposed in the bottom wall of the second housing 42, and the actuator further includes: and a bushing 32 disposed on a top wall of the first housing 41, wherein a first end of the output shaft 31 is inserted into the bushing 32. By providing the sleeve 32, wear of the first end of the output shaft 31 can be reduced, and the rotation of the output shaft 31 can be made smoother. The second end of the output shaft 31 is adapted to be connected to a controlled valve. Further, the second end of the output shaft 31 has a mounting hole therein for connection with a valve.

In this embodiment, the actuator further comprises a sealing ring 33, the sealing ring 33 being arranged between the second end of the output shaft 31 and the bottom wall of the second housing 42. The sealing ring 33 can improve the sealing performance and reliability of the actuator.

In this embodiment, the actuator further includes: and a second positioning portion provided between the first housing 41 and the second housing 42, the second positioning portion being for positioning the second worm 13. The positioning and assembly of the second worm 13 can be facilitated by the second positioning portion. The second worm 13 is rotatably connected with the second positioning portion. In the present embodiment, the first worm wheel 12 is disposed on the second worm 13, so that the first worm wheel 12 can be positioned at the same time, which facilitates assembly.

Specifically, the second positioning portion includes a third positioning block 61, a fourth positioning block 62, a fifth positioning block 63 and a sixth positioning block 64, wherein the third positioning block 61 and the fourth positioning block 62 are disposed on the first housing 41, the fifth positioning block 63 and the sixth positioning block 64 are disposed on the second housing 42, the third positioning block 61 and the fifth positioning block 63 are correspondingly disposed, the fourth positioning block 62 and the sixth positioning block 64 are correspondingly disposed, one end of the second worm 13 is disposed in a cavity between the third positioning block 61 and the fifth positioning block 63, and the other end of the second worm 13 is disposed in a cavity between the fourth positioning block 62 and the sixth positioning block 64. With the above arrangement, in the process of assembling the first housing 41 and the second housing 42, the third positioning block 61 and the fifth positioning block 63 and the fourth positioning block 62 and the sixth positioning block 64 can be matched, so that the above arrangement facilitates the assembling of the actuator.

In this embodiment, the periphery of the first housing 41 is connected to the periphery of the second housing 42, and the actuator further includes: a first positioning column 81 provided on the first housing 41; and the second positioning column 82 is arranged on the second shell 42, and the second positioning column 82 is connected with the first positioning column 81 in a matching manner. By arranging the first positioning column 81 and the second positioning column 82, positioning and assembling of the first housing 41 and the second housing 42 can be facilitated, and assembling efficiency can be improved. The first positioning column 81 and the second positioning column 82 may be provided in plurality. In the present embodiment, the peripheral edge of the first housing 41 is hermetically connected to the peripheral edge of the second housing 42, which can improve the reliability of the actuator.

The installation process of the actuator is as follows: the output shaft 31 and the sealing ring 33 are installed on the second shell 42, the PCB is connected with the angle sensor 52 in a welding mode, the motor is welded with the wire harness 53 after being pressed and installed with the first worm 11, then the motor is welded with the PCB, the motor is installed on the second shell 42, then the motor is fixed through the second positioning block 72 and then placed into the second worm 13, the PCB is placed and fastened through screws, and then the pins are welded. The shaft sleeve 32 is put into the D-shaped shaft of the output shaft 31, and then the first shell 41 is installed and hermetically connected with the second shell 42, namely the assembly of the actuator is completed.

The motor can be a stepping motor or a common direct current motor, the angle sensor 52 can be omitted or not omitted when the stepping motor is adopted, so that a position feedback closed loop is realized, the common direct current motor needs to feed back through the angle sensor 52 to judge whether the motor is in place, and when the position sensor is arranged, the position of the output shaft 31 and the angle of the D-shaped shaft have to be unique. If the angle sensor 52 is not adopted, position feedback can be realized through the brush circuit, and an automatic power-off loop can be added in place for control.

The actuator can realize large transmission ratio through double-stage worm and gear transmission, and has very compact structure and small volume. A D-shaped shaft section is arranged on the output shaft 31, and the angle of the output shaft 31 is tested by an angle sensor 52 arranged on a PCB (circuit board 51), so that the actual output angle of the actuator is accurately fed back.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An actuator, comprising:

a first worm (11) and a first worm wheel (12) which are in driving connection;

a second worm (13) and a second worm wheel (14) which are in driving connection, wherein the second worm (13) is connected with the first worm wheel (12), the second worm (13) and the first worm wheel (12) are coaxially arranged, and the second worm (13) and the first worm (11) are vertically arranged;

a drive part (20) which is in drive connection with the first worm (11);

an output shaft (31) connected to the second turbine (14), the output shaft (31) and the second turbine (14) being coaxially disposed;

a first positioning section for positioning the drive section (20).

2. The actuator according to claim 1, further comprising a first housing (41) and a second housing (42) connected to each other, wherein the first worm (11), the first worm wheel (12), the second worm (13), the second worm wheel (14), the driving portion (20), the output shaft (31), and the first positioning portion are provided between the first housing (41) and the second housing (42).

3. The actuator of claim 2, wherein the first positioning portion comprises:

a first positioning block (71) provided on the second housing (42);

the second positioning block (72) is detachably connected with the first positioning block (71), a first positioning groove (721) is formed in the second positioning block (72), and the side wall of the first positioning groove (721) is abutted to the side wall of the driving portion (20).

4. The actuator of claim 3, wherein the first positioning portion further comprises:

the positioning plate (73) is arranged on the first shell (41), a second positioning groove (731) is formed in the positioning plate (73), and the side wall of the second positioning groove (731) is abutted to the side wall of the driving portion (20).

5. The actuator of claim 2, further comprising:

a circuit board (51) disposed between the first case (41) and the second case (42), the driving part (20) being electrically connected to the circuit board (51).

6. The actuator of claim 5, further comprising:

an angle sensor (52) disposed on the circuit board (51), the first end of the output shaft (31) being connected to the angle sensor (52).

7. The actuator according to claim 6, wherein the first end of the output shaft (31) passes through the circuit board (51) and the angle sensor (52), the first end of the output shaft (31) has a limit plane (311), and the limit plane (311) is in limit fit with the angle sensor (52).

8. The actuator according to claim 1, wherein the output shaft (31) passes through a through hole on the second turbine (14), and a limiting groove (141) for limiting the circumferential direction of the output shaft (31) is formed on the inner wall of the through hole.

9. The actuator of claim 2, wherein the second end of the output shaft (31) is disposed through a bottom wall of the second housing (42), the actuator further comprising:

a bushing (32) disposed on a top wall of the first housing (41), a first end of the output shaft (31) being inserted into the bushing (32).

10. The actuator of claim 2, further comprising:

a second positioning portion provided between the first housing (41) and the second housing (42), the second positioning portion being used to position the second worm (13).

11. The actuator according to claim 10, wherein the second positioning portion comprises a third positioning block (61), a fourth positioning block (62), a fifth positioning block (63) and a sixth positioning block (64), wherein the third positioning block (61) and the fourth positioning block (62) are provided on the first housing (41), the fifth positioning block (63) and the sixth positioning block (64) are arranged on the second housing (42), the third positioning block (61) and the fifth positioning block (63) are correspondingly arranged, the fourth positioning block (62) and the sixth positioning block (64) are correspondingly arranged, one end of the second worm (13) is arranged in a cavity between the third positioning block (61) and the fifth positioning block (63), the other end of the second worm (13) is arranged in a cavity between the fourth positioning block (62) and the sixth positioning block (64).

12. The actuator according to claim 2, wherein the periphery of the first housing (41) is connected to the periphery of the second housing (42), the actuator further comprising:

a first positioning column (81) provided on the first housing (41);

the second positioning column (82) is arranged on the second shell (42), and the second positioning column (82) is connected with the first positioning column (81) in a matched mode.