CN108413114B

CN108413114B - Actuator

Info

Publication number: CN108413114B
Application number: CN201810393716.0A
Authority: CN
Inventors: 纪翀; 王磊; 李周; 吴双峰
Original assignee: Beijing Institute Of Light Quantitative Science And Research Co Ltd
Current assignee: Beijing Institute Of Light Quantitative Science And Research Co Ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2020-03-17
Anticipated expiration: 2038-04-27
Also published as: CN108413114A

Abstract

The present invention provides an actuator comprising: a transmission mechanism; the manual mechanism is used for driving the transmission mechanism to rotate and is provided with a first position in driving connection with the transmission mechanism and a second position disconnected with the transmission mechanism; a locking mechanism having a locking position and an opening position; when the manual mechanism is located at the first position, the locking mechanism is located at the locking position to prevent the manual mechanism from being separated from the transmission mechanism; when the manual mechanism is in the second position, the locking mechanism is in the open position. Through the technical scheme provided by the invention, the problem that the actuator in the prior art is inconvenient to operate can be solved.

Description

Actuator

Technical Field

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

Background

Actuators are commonly used for automated control of valves. The valve can be accurately rotated to a required position under the action of a control signal through the driving of a motor. Actuators generally have two modes of operation, automatic and manual. The actuators on the market at present require manual intervention when switching between automatic and manual modes. After the automatic switching mode is switched to the manual mode, manual force is required to be exerted all the time to keep the disconnection state of the transmission part and the motor, and meanwhile, a hand wheel is required to be rotated to control the opening and closing of the valve. The requirement on workers is high, and operation is very laborious under some working conditions.

Disclosure of Invention

The invention provides an actuator, which aims to solve the problem that the actuator in the prior art is inconvenient to operate.

In order to solve the above problems, the present invention provides an actuator including: a transmission mechanism; the manual mechanism is used for driving the transmission mechanism to rotate and is provided with a first position in driving connection with the transmission mechanism and a second position disconnected with the transmission mechanism; a locking mechanism having a locking position and an opening position; when the manual mechanism is located at the first position, the locking mechanism is located at the locking position to prevent the manual mechanism from being separated from the transmission mechanism; when the manual mechanism is in the second position, the locking mechanism is in the open position.

Further, the manual mechanism comprises a rotating shaft, the rotating shaft can rotate and axially move, when the manual mechanism is located at the first position, the rotating shaft is in driving connection with the transmission mechanism, and the locking mechanism is in contact with the rotating shaft so as to prevent the rotating shaft and the transmission mechanism from moving relatively.

Further, the actuator further comprises a housing, the locking mechanism is movably arranged on the housing, the rotating shaft is arranged on the housing, a groove is formed in the outer circumference of the rotating shaft, and when the rotating shaft is located at the first position, the locking mechanism is clamped in the groove.

Further, the recess is annular, and locking mechanism includes: the connecting piece is arranged on the shell; the joint spare, movably setting is on the connecting piece, and the joint spare is used for with the recess joint.

Further, the locking mechanism is a push-pull electromagnet which can be switched between a locking position and an opening position, and the push-pull electromagnet can be kept at the locking position or the opening position.

Further, the transmission mechanism includes: the first end of the first transmission piece is connected with the rotating shaft in a matched mode through a spline; the second transmission piece is connected with the first transmission piece in a matched mode, and the first transmission piece can drive the second transmission piece to rotate.

Further, the first transmission part is a worm, the second transmission part is a turbine, a spline is arranged at the first end of the worm, a key groove is formed in the end portion of the rotating shaft, and the spline is used for being connected with the key groove in a matched mode.

Further, the actuator further comprises: one end of the first elastic piece is abutted with the transmission mechanism, and the other end of the first elastic piece is abutted with the manual mechanism.

Further, the actuator further comprises: the driving mechanism is used for driving the transmission mechanism to rotate and is provided with a third position in driving connection with the transmission mechanism and a fourth position disconnected with the transmission mechanism; when the manual mechanism is located at the first position, the driving mechanism is located at the fourth position; when the manual mechanism is in the second position, the drive mechanism is in a third position.

Further, the actuator further comprises: the clutch, actuating mechanism passes through the clutch and is connected or breaks off with drive mechanism, and the clutch is including first separation and reunion spare and the second separation and reunion spare that can connect and separate, and first separation and reunion spare is connected with drive mechanism, and the second separation and reunion spare is connected with actuating mechanism, and when manual mechanism was located the first position, manual mechanism separated second separation and reunion spare and first separation and reunion spare.

Further, the first clutch member and the second clutch member slide or disengage relative to each other when the torque experienced by the clutch exceeds a predetermined value.

Further, the actuator further comprises: and one end of the second elastic piece is abutted with the second clutch piece, and the other end of the second elastic piece is abutted with the driving mechanism.

Furthermore, the transmission mechanism comprises a first transmission piece and a second transmission piece which are connected in a matching manner, the first transmission piece can drive the second transmission piece to rotate, and the first transmission piece is of a hollow structure; the manual mechanism further comprises a rotating shaft and an ejector rod, the first end of the first transmission piece is detachably connected with the rotating shaft, the second end of the first transmission piece is detachably connected with the driving mechanism, one end of the ejector rod is connected with the rotating shaft, the ejector rod is arranged in the first transmission piece in a penetrating mode, the rotating shaft can drive the ejector rod to move axially, and when the manual mechanism is located at the first position, the other end of the ejector rod is abutted to the driving mechanism to separate the driving mechanism from the first transmission piece.

By applying the technical scheme of the invention, the driving of the transmission mechanism can be realized by manually operating the manual mechanism, and due to the arrangement of the locking mechanism, when the manual mechanism moves to the first position, the locking mechanism can move to the locking position to limit so as to prevent the manual mechanism from separating from the transmission mechanism, so that the reliable connection between the manual mechanism and the transmission mechanism can be realized without manual intervention, thereby reducing manual force and facilitating manual operation. When the manual mechanism needs to be separated from the transmission mechanism, the locking mechanism can be separated by moving the locking mechanism to the second position. Through the technical scheme of the invention, the problem of inconvenient operation of the actuator in the prior art can be solved.

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 enlarged partial view of the actuator of FIG. 1 in position A;

fig. 3 shows a close-up view of the actuator in fig. 1 in position B.

Wherein the figures include the following reference numerals:

10. a transmission mechanism; 11. a first transmission member; 12. a second transmission member; 20. a manual mechanism; 21. a rotating shaft; 211. a groove; 22. a top rod; 30. a locking mechanism; 31. a connecting member; 32. a clamping piece; 40. a housing; 50. a first elastic member; 60. a drive mechanism; 70. a clutch; 71. a first clutch member; 72. a second clutch member; 80. a second elastic member.

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 3, an embodiment of the present invention provides an actuator including: a transmission mechanism 10; the manual mechanism 20 is used for driving the transmission mechanism 10 to rotate, and the manual mechanism 20 is provided with a first position in driving connection with the transmission mechanism 10 and a second position disconnected with the transmission mechanism 10; a locking mechanism 30, the locking mechanism 30 having a locked position and an unlocked position; when the manual operating mechanism 20 is located at the first position, the locking mechanism 30 is located at the locking position to prevent the manual operating mechanism 20 from being separated from the transmission mechanism 10; when the manual actuator 20 is in the second position, the locking mechanism 30 is in the open position.

By applying the technical scheme of the embodiment, the manual mechanism 20 can be manually operated to drive the transmission mechanism 10, and due to the arrangement of the locking mechanism 30, when the manual mechanism 20 moves to the first position, the locking mechanism 30 can move to the locking position to limit the separation of the manual mechanism 20 and the transmission mechanism 10, so that the reliable connection between the manual mechanism 20 and the transmission mechanism 10 can be realized without manual intervention, the manual force can be reduced, and the manual operation is facilitated. When the hand operated mechanism 20 needs to be disengaged from the actuator 10, the locking mechanism 30 can be moved to the second position to disengage the two. Through the technical scheme of this embodiment, can solve the inconvenient problem of executor operation among the prior art. The transmission mechanism 10 of the actuator is connected with the valve, and the valve can be opened or closed through the rotation of the transmission mechanism 10.

Specifically, the manual mechanism 20 includes a rotating shaft 21, the rotating shaft 21 is rotatable and axially movable, when the manual mechanism 20 is located at the first position, the rotating shaft 21 is in driving connection with the transmission mechanism 10, and the locking mechanism 30 is in contact with the rotating shaft 21 to prevent the rotating shaft 21 and the transmission mechanism 10 from moving relatively. The arrangement can prevent the rotating shaft 21 and the transmission mechanism 10 from moving relatively through the contact of the locking mechanism 30 and the rotating shaft 21, so that the reliable connection of the rotating shaft 21 and the transmission mechanism 10 can be realized without manual intervention. Therefore, the transmission mechanism 10 can be driven by rotating the rotating shaft without applying axial force manually, so that manual operation can be facilitated, and force application is reduced.

In this embodiment, the actuator further comprises a housing 40, the locking mechanism 30 is movably arranged on the housing 40, the rotating shaft 21 is rotatably arranged on the housing 40, the outer circumference of the rotating shaft 21 is provided with a groove 211, and the locking mechanism 30 is clamped in the groove 211 when the rotating shaft 21 is located at the first position. Therefore, the locking mechanism 30 is matched with the groove 211 to limit the rotating shaft 21, so that the rotating shaft 21 and the transmission mechanism 10 are prevented from moving relatively.

As shown in fig. 2, in this embodiment, the recess 211 may be configured as a ring, and the locking mechanism 30 includes: a connector 31 provided on the housing 40; and the clamping piece 32 is movably arranged on the connecting piece 31, and the clamping piece 32 is used for clamping with the groove 211. The limiting of the rotating shaft 21 can be realized through the matching of the clamping piece 32 and the groove 211. Since the groove 211 has an annular structure, smooth rotation of the rotation shaft 21 can be ensured.

In this embodiment, the locking mechanism 30 may be provided as a push-pull electromagnet that can be switched between a locking position and an opening position, and that can be held in either the locking position or the opening position. Thus, the electromagnet can be triggered by a control device or manually to act, so that the position of the locking mechanism 30 can be switched conveniently. Moreover, the push-pull electromagnet can be kept at the locking position or the opening position, so that the locking mechanism 30 can be prevented from moving accidentally, and the reliability of the actuator is ensured.

In the present embodiment, the transmission mechanism 10 includes: the first end of the first transmission piece 11 is connected with the rotating shaft 21 in a matched mode through a spline; the second transmission member 12 is connected to the first transmission member 11 in a matching manner, and the first transmission member 11 can drive the second transmission member 12 to rotate. Wherein, the second transmission piece 12 is used for driving the valve to rotate.

Specifically, the first transmission member 11 may be configured as a worm, the second transmission member 12 may be configured as a worm wheel, a first end of the worm has a spline, and an end of the rotating shaft 21 has a key groove, and the spline is used for being in fit connection with the key groove. Through the matching of the spline and the key groove, the axial movement and the torque transmission of the rotating shaft 21 and the worm can be realized.

In this embodiment, the actuator further includes: the first elastic member 50 has one end of the first elastic member 50 abutting against the transmission mechanism 10 and the other end of the first elastic member 50 abutting against the manual operating mechanism 20. Thus, the first elastic member 50 can apply a force to the transmission mechanism 10 and the manual operating mechanism 20 to move away from each other, and when the locking mechanism 30 is moved to the open position, the transmission mechanism 10 and the manual operating mechanism 20 can be separated under the elastic force of the first elastic member 50. The arrangement can disconnect the transmission mechanism 10 and the manual mechanism 20 when the manual operation mode is not needed, prevent the transmission mechanism 10 from driving the manual mechanism 20 to rotate when rotating, and improve the safety.

In this embodiment, the actuator further includes: the driving mechanism 60 is used for driving the transmission mechanism 10 to rotate, and the driving mechanism 60 is provided with a third position in driving connection with the transmission mechanism 10 and a fourth position disconnected with the transmission mechanism 10; when the manual mechanism 20 is in the first position, the drive mechanism 60 is in the fourth position; when the hand operating mechanism 20 is in the second position, the drive mechanism 60 is in the third position. The drive mechanism 60 may be an electric or hydraulic drive, such as an electric motor, which effects automatic actuation of the actuator. Through the technical scheme of the embodiment, the actuator can be switched between the manual operation mode and the automatic operation mode through the cooperation of the driving mechanism 60 and the manual mechanism 20.

As shown in fig. 3, in the present embodiment, the actuator further includes: the clutch 70, the driving mechanism 60 is connected with or disconnected from the transmission mechanism 10 through the clutch 70, the clutch 70 includes a first clutch 71 and a second clutch 72 which can be connected and disconnected, the first clutch 71 is connected with the transmission mechanism 10, the second clutch 72 is connected with the driving mechanism 60, and when the manual mechanism 20 is located at the first position, the manual mechanism 20 disconnects the second clutch 72 from the first clutch 71. This allows the transmission 10 to be connected to or disconnected from the drive 60 by means of the clutch 70.

To improve actuator safety, the first clutch 71 and the second clutch 72 slip or disengage relative to each other when the torque experienced by the clutch 70 exceeds a predetermined value. This allows the transmission mechanism 10 to be separated from the drive mechanism 60 in the event of excessive torque, so that the drive mechanism 60 can be protected.

In this embodiment, the actuator further includes: one end of the second elastic member 80 abuts against the second clutch member 72, and the other end of the second elastic member 80 abuts against the driving mechanism 60. Such that the second resilient member 80 can apply a force to the second clutch member 72 toward the first clutch member 71. When the manual mechanism 20 is located at the second position, the first clutch 71 and the second clutch 72 can be automatically connected, so that the driving mechanism 60 and the transmission mechanism 10 can be connected, and the reliability of connection can be ensured.

In this embodiment, the transmission mechanism 10 includes a first transmission member 11 and a second transmission member 12 that are connected in a matching manner, the first transmission member 11 can drive the second transmission member 12 to rotate, and the first transmission member 11 is a hollow structure; the manual mechanism 20 further includes a rotating shaft 21 and a push rod 22, the first end of the first transmission member 11 is detachably connected to the rotating shaft 21, the second end of the first transmission member 11 is detachably connected to the driving mechanism 60, one end of the push rod 22 is connected to the rotating shaft 21, the push rod 22 is inserted into the first transmission member 11, the rotating shaft 21 can drive the push rod 22 to axially move, and when the manual mechanism 20 is located at the first position, the other end of the push rod 22 abuts against the driving mechanism 60 to separate the driving mechanism 60 from the first transmission member 11. In this way, when the manual mechanism 20 moves to the first position, the push rod 22 moves toward the driving mechanism 60, and the driving mechanism 60 is separated from the first transmission member 11 by the force applied by the push rod 22. Specifically, the first clutch 71 and the second clutch 72 can be separated by the carrier rod 22. Therefore, the actuator can be switched between a manual operation mode and an automatic operation mode, and the operation of the actuator is convenient.

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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Claims

1. An actuator, comprising:

a transmission mechanism (10);

the manual mechanism (20) is used for driving the transmission mechanism (10) to rotate, and the manual mechanism (20) is provided with a first position in driving connection with the transmission mechanism (10) and a second position disconnected with the transmission mechanism (10);

a locking mechanism (30), the locking mechanism (30) having a locked position and an unlocked position;

when the manual mechanism (20) is in the first position, the locking mechanism (30) is in the locking position to prevent the manual mechanism (20) from being separated from the transmission mechanism (10);

when the manual mechanism (20) is in the second position, the locking mechanism (30) is in the open position;

the manual mechanism (20) comprises a rotating shaft (21), the rotating shaft (21) can rotate and move axially, when the manual mechanism (20) is located at the first position, the rotating shaft (21) is in driving connection with the transmission mechanism (10), and the locking mechanism (30) is in contact with the rotating shaft (21) to prevent the rotating shaft (21) and the transmission mechanism (10) from moving relatively;

the actuator further comprises a shell (40), the locking mechanism (30) is movably arranged on the shell (40), the rotating shaft (21) is arranged on the shell (40), a groove (211) is formed in the outer circumference of the rotating shaft (21), and the locking mechanism (30) is clamped in the groove (211) when the rotating shaft (21) is located at the first position;

the locking mechanism (30) is a push-pull electromagnet which can be switched between the locking position and the opening position and can be kept in the locking position or the opening position.

2. Actuator according to claim 1, wherein the recess (211) is annular and the locking mechanism (30) comprises:

a connector (31) provided on the housing (40);

the clamping piece (32) is movably arranged on the connecting piece (31), and the clamping piece (32) is used for being clamped with the groove (211).

3. Actuator according to claim 1, wherein the transmission mechanism (10) comprises:

the first end of the first transmission piece (11) is connected with the rotating shaft (21) in a matched mode through a spline;

the second transmission piece (12) is connected with the first transmission piece (11) in a matched mode, and the first transmission piece (11) can drive the second transmission piece (12) to rotate.

4. The actuator according to claim 3, wherein the first transmission member (11) is a worm, the second transmission member (12) is a worm wheel, a first end of the worm has a spline, and an end of the rotary shaft (21) has a key groove, and the spline is used for matching connection with the key groove.

5. The actuator of claim 1, further comprising:

one end of the first elastic piece (50) is abutted with the transmission mechanism (10), and the other end of the first elastic piece (50) is abutted with the manual mechanism (20).

6. The actuator of claim 1, further comprising:

the driving mechanism (60) is used for driving the transmission mechanism (10) to rotate, and the driving mechanism (60) is provided with a third position in driving connection with the transmission mechanism (10) and a fourth position disconnected with the transmission mechanism (10);

when the manual mechanism (20) is in the first position, the drive mechanism (60) is in the fourth position;

the drive mechanism (60) is in the third position when the manual mechanism (20) is in the second position.

7. The actuator of claim 6, further comprising:

clutch (70), actuating mechanism (60) pass through clutch (70) with drive mechanism (10) connect or break off, clutch (70) are including first clutch (71) and second clutch (72) that can connect and separate, first clutch (71) with drive mechanism (10) are connected, second clutch (72) with actuating mechanism (60) are connected, work as manual mechanism (20) are located when first position, manual mechanism (20) will second clutch (72) with first clutch (71) separation.

8. Actuator according to claim 7, wherein the first clutch member (71) and the second clutch member (72) slide or disengage relative to each other when the torque to which the clutch (70) is subjected exceeds a predetermined value.

9. The actuator of claim 7, further comprising:

and one end of the second elastic piece (80) is abutted with the second clutch piece (72), and the other end of the second elastic piece (80) is abutted with the driving mechanism (60).

10. The actuator of claim 6,

the transmission mechanism (10) comprises a first transmission piece (11) and a second transmission piece (12) which are connected in a matched mode, the first transmission piece (11) can drive the second transmission piece (12) to rotate, and the first transmission piece (11) is of a hollow structure;

the manual mechanism (20) further comprises a rotating shaft (21) and an ejector rod (22), the first end of the first transmission piece (11) is detachably connected with the rotating shaft (21), the second end of the first transmission piece (11) is detachably connected with the driving mechanism (60), one end of the ejector rod (22) is connected with the rotating shaft (21), the ejector rod (22) penetrates through the first transmission piece (11), the rotating shaft (21) can drive the ejector rod (22) to axially move, and when the manual mechanism (20) is located at the first position, the other end of the ejector rod (22) is abutted to the driving mechanism (60) so as to separate the driving mechanism (60) from the first transmission piece (11).