KR20180123877A - Spring return type actuator - Google Patents

Abstract

The present invention relates to a spring return type actuator. According to an embodiment of the present invention, disclosed is the spring return type actuator which includes: a motor installed at one side of a casing and having a rotation shaft to which a driving gear is coaxially coupled; a sun gear driving-coupled to the driving gear through a driving gear train; a planet gear assembly include a planet gear provided outside the sun gear and geared with the sun gear, a carrier coupled to make revolution when the planet gear rotates around the sun gear, and a ring gear provided outside the planet gear and geared with the planet gear; a rotational shaft rotated integrally with the carrier to transmit driving force of the motor to an output side; a reel spring installed at one side of an outer circumference surface of the rotational shaft, transforming the driving force of the motor into elastic resilience to be stored, and providing the elastic resilience such that the rotational shaft is rotatable to be recovered when the power of the motor is turned off; and a rotation locking unit including a solenoid provided on an opposite side of the casing, a link member connected to the solenoid and configured to be maintained at a first position in a power-on state of the solenoid and to rotate to a second position by a spring in a power-off state, a locking gear locked to or released from a locking member mounted at an opposite side of a link shaft of the link member, and including a locking gear driving-coupled to the locking gear through the locking gear train, locked and coupled to an out surface of the ring gear when the link member is at the first position and released from locking when the link member is at the second position.

Description

[0001] The present invention relates to a spring return type actuator,

[0001] The present invention relates to a spring return type actuator, and more particularly, to a spring return type actuator having a planetary gear unit and a reel spring so as to automatically rotate and restore the rotation shaft when the power is off, The present invention relates to a spring return type actuator capable of stable restoration rotation while occupying a small volume by allowing rotation of a ring gear when a power is turned off.

The actuator is a mechanical device used to move or control the system, and the spring return type actuator is a driving device that automatically opens the valve when the power is turned off.

For example, a spring return valve actuator is designed such that the vent opening is automatically opened by opening the valve to prevent smoke-induced suffocation when the power supply is cut off due to a fire or the like.

Actuator is divided into air compressing type and motor driving type according to the method of providing driving force at the time of power supply, and it is classified into a battery type or a reel spring type .

Motor-driven actuators are generally used because they are simpler to use than air compressors.

Also, among the motor-driven actuators, the spring return type actuator has an advantage in that it can be stably driven as compared with the battery type actuator in which the emergency operation is performed by the emergency battery because the valve is opened by the mechanical elements by the emergency operation Is preferred.

As an example of the prior art relating to such a spring return type actuator, there is a " spring return valve actuator using one planetary gear unit ", which was filed by the present applicant and is registered in Korean Patent Registration No. 10-1130983.

The conventional art is a spring return type actuator using one planetary gear unit. In the past, two planetary gears have been conventionally installed in a longitudinal direction so that a single planetary gear unit is used, thereby reducing overall actuator size and cost reduction. .

However, the above-mentioned prior art uses an electromagnetic brake for rotationally locking the ring gear in the power supply state and for releasing the rotational unlocking state of the ring gear in the power-off state, so that, for the rotation locking of the ring gear having a high torque, There has been a limit in reducing the size and manufacturing cost of the actuator, which is required to use a high-grade (e.g., large size) electromagnetic brake.

Korean Registered Patent No. 10-1130983 (registered on March 21, 2012)

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above problems, and it is an object of the present invention to provide a planetary gear device and a reel spring, which are capable of automatically restoring rotation of a rotating shaft when power is turned off, And it is an object of the present invention to provide a spring return type actuator capable of stable restoration rotation while occupying a small volume by rotating the ring gear when the power is turned off.

According to an aspect of the present invention, there is provided a motor comprising: a motor installed at one side of a casing and coaxially coupled to a rotation shaft of a drive shaft; A sun gear coupled to the drive gear through a drive gear train, a planetary gear mounted outside the sun gear, a carrier coupled to the planetary gear so that the planetary gear rotates when revolving around the sun gear, A planetary gear body including a ring gear provided outside the planetary gear and gear-coupled; A pivot shaft configured to rotate integrally with the carrier and to transmit a driving force of the motor to an output side; A reel spring installed on one side of the outer circumferential surface of the rotating shaft to convert the driving force of the motor into an elastic restoring force and to provide the elastic restoring force so that the rotating shaft can be restored and rotated when the motor is powered off; A link member connected to the solenoid and configured to rotate in a power-off state to a second position by a spring while maintaining a first position in a power-on state of the solenoid; A lock gear engaged with the engaging member provided on the other side of the shaft and driven by the engaging gear and the lock gear train to be locked with the outer surface of the ring gear at the first position of the link member, And a rotation locking means including a lock gear configured to be unlocked at the time of unlocking the spring return type actuator.

Preferably, the actuator includes a variable worm shaft installed to be able to engage with the outer side of the ring gear, a variable worm shaft interlocked with the eccentric cam rotated by the lever, and configured to be separated or engaged with the outer side of the ring gear; And a manual handle coupled coaxially to the variable worm shaft and transmitting a manual rotational force to the ring gear via the variable worm shaft having an engaged state outside the ring gear.

Preferably, the rotation locking means includes a solenoid provided on the upper side of the upper frame provided inside the casing, and a solenoid provided on the upper side of the casing so as to be rotatable around a link shaft extending through the upper frame, A link member connected to be pivoted to the first position and pivoted to the second position opposite to the pivotal movement to the first position by the spring fixed to the upper frame; And a lock gear which is engaged with an outer surface of the ring gear and which is engaged with the engaging gear and the lock gear train And is locked to the outer surface of the ring gear at the first position and unlocked at the second position And a lock gear configured to be locked.

Preferably, the engaging gear is a ratchet gear, and the engaging member is provided with a latching protrusion inserted or drawn out between the latches of the engaging gear.

It is an advantage of the present invention to provide a spring return type actuator having a small volume occupied by components for restoring rotation of a rotary shaft when the power is off and being constructed of an electronic control element (solenoid) have.

Particularly, the present invention has an advantage of providing a durable spring return type actuator by minimizing the use of electric elements for rotation locking of the ring gear and by engaging with a mechanical element.

The present invention also has the advantage that the actuator can be operated manually in the power off state.

1 is a perspective view of a spring return type actuator according to an embodiment of the present invention, in which a casing is omitted.
2 is a partially exploded perspective view of a spring return type actuator according to an embodiment of the present invention, in which a casing and an upper frame are omitted.
3 is a front view of a spring return type actuator according to an embodiment of the present invention, in which a casing and an upper frame are omitted.
4 is a rear view of a spring return type actuator according to an embodiment of the present invention in which a casing and an upper frame are omitted.
5 and 6 are schematic plan views of a spring return type actuator according to an embodiment of the present invention, in which a casing is omitted.
7 is a cross-sectional view of a spring return type actuator according to an embodiment of the present invention, in which a casing and an upper frame are omitted.
8 is a perspective view of a spring return type actuator according to another embodiment of the present invention, in which a casing and an upper frame are omitted.
9 is a cross-sectional view of a spring return type actuator according to another embodiment of the present invention in which a casing and an upper frame are coupled.
10 is a partial perspective view of the spring return type actuator according to another embodiment of the present invention in which the manual handle side is disengaged from the ring gear.
11 is a horizontal sectional view of Fig.
12 is a partial perspective view of the spring return type actuator according to another embodiment of the present invention in a state in which the manual handle side is drivingly connected to the ring gear.
13 is a horizontal sectional view of Fig.

The present invention may be embodied in many other forms without departing from its spirit or essential characteristics. Accordingly, the embodiments of the present invention are to be considered in all respects as merely illustrative and not restrictive.

The terms first, second, etc. are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between.

The singular expressions used in the present application include plural expressions unless the context clearly dictates otherwise. In the present application, the terms " comprises ", " comprising ", " having ", and the like, are used to denote that there is an element described in the specification or a combination thereof, It is not excluded in advance.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a spring return type actuator according to an embodiment of the present invention, FIG. 2 is a partially exploded perspective view of a spring return type actuator according to an embodiment of the present invention, 3 is a front view of a spring return type actuator according to an embodiment of the present invention, in which a casing and an upper frame are omitted, FIG. 4 is a rear view of a spring return type actuator according to an embodiment of the present invention, And FIG. 7 is a cross-sectional view of a spring return type actuator according to an embodiment of the present invention, in which a casing and an upper frame are omitted.

The spring return type actuator according to an embodiment of the present invention is a spring return type actuator driven by a motor 15 and includes a planetary gear set 30 including a sun gear 31 driven by a motor 15, A reel spring (55) for storing the driving force of the motor (15), and a control unit for controlling the on / off state of the power source And a rotation locking means (60) for changing the driving state of the planetary gear set (30).

The spring return type actuator may be, for example, a spring return valve actuator configured to open or close the valve by rotation of the pivot shaft 41. [

In order to facilitate understanding of the present invention, the operation of the spring return valve actuator will be described below. The direction of rotation of the rotary shaft 41 by the driving of the motor 15 is controlled in a direction in which the valve is opened, As shown in FIG.

The motor 15 is installed on one side of the casing 1 (see Fig. 9), and the driving gear 12 is coaxially coupled to the rotary shaft 11. [

The planetary gear set 30 includes a sun gear 31 driven by the drive gear 12 through drive gear trains 13a, 13b, 13c, 13d, 13e and 13f and a driven gear 14, A carrier 34 coupled to the planetary gear 33 so that the planetary gear 33 is rotated when the planetary gear 33 revolves around the sun gear 31, And a ring gear 35 provided on the outside of the ring gear 33.

For example, as shown in FIGS. 3 and 4, when the actuator is driven in a power-on state, the motor rotation shaft 11 is rotated by the motor 15 to rotate the drive gear 12, The drive gear 12 is connected to the driven gear 14 via a drive gear train 13 in which a plurality of gears 13a, 13b, 13c, 13d, 13e, 13f are sequentially gear- And transmits driving force.

The driven gear 14 transmits the driving force to the coaxially coupled sun gear 31, and rotation of the sun gear 31 is achieved.

At this time, the ring gear 35 is kept in the rotation locked state by the rotation locking means 60 and the rotation of the sun gear 31 is transmitted to the carrier 34 through the planetary gear 33, The carrier 34 on the inner side of the sun gear 35 rotates in the same direction as the sun gear 31.

The rotation of the pivot shaft 41 is achieved by the rotation of the carrier 34.

The pivot shaft 41 is configured to transmit the driving force of the motor 15 to the output side. For example, the pivot shaft 41 is integrally formed with the carrier 34 and integrally rotates with the carrier 34.

When the rotation direction of the rotation shaft 41 is the valve closing direction, the reel spring 55 for storing the driving force of the motor 15 rotates in the same direction when the rotation shaft 41 rotates, It is done. The driving force of the motor 15 is converted into an elastic restoring force by the rewinding of the reel spring 55, and the reel spring 55 is held in the closed state.

The elastic restoring force is for restoring rotation of the rotation shaft 41 when the power of the motor 15 is turned off due to a power failure or a fire. When the rotation locking state of the ring gear 35 is released The resilient restoring force stored in the reel spring 55 is provided to the rotating shaft 41 so that the rotating shaft 41 is rotated in the reverse direction so that the valve is in an emergency opening state of the actuator.

For example, a rotation recognition axis 38 is coupled to an upper end of the center of the rotation axis 41, and a rotation state indicating plate 39 is provided at an upper end of the rotation recognition axis 38.

The rotation state indicating plate 39 is configured to rotate in the same direction with the rotation axis 41 and the rotation recognition axis 38 when the rotation axis 41 rotates.

It is possible to easily determine whether the valve 15 is in the opened or closed state when the power is off as well as the driving state of the motor 15 due to the rotation state indicating plate 39 (see FIGS. 5 and 6) A transparent window 2 (see FIG. 8) for confirming the rotation state indicating plate 39 from the outside can be formed on the upper side of the display unit 1.

For example, a stopper 52 (see FIGS. 8 and 9) for restricting the rotation angle of the rotary shaft 41 to a predetermined range is provided below the rotary shaft 41.

For example, the stopper 52 is engaged with the rotation shaft 41 and rotated together with the rotation shaft 41 in the same direction when the rotation shaft 41 rotates. The stopper 52 is formed at a position corresponding to the stopper 52 at one side of the casing 1 Rotation is restricted by the fixing bolt 6, and the rotation of the rotary shaft 41 is performed only within the set angle range, so that an accurate valve opening or closing can be achieved.

Reference numeral 84 denotes a support frame 84 for supporting the drive gear 12 and a drive gear train composed of a plurality of gears for actuator driving from below.

5 and 6 are schematic plan views of a spring return type actuator according to an embodiment of the present invention, in which a casing is omitted.

FIG. 5 is a schematic view for explaining the operation of the rotation locking means 60 when the power is turned on, and FIG. 6 is a schematic diagram for explaining the operation of the rotation locking means 60 when the power is off.

The change in the driving state of the planetary gear set 30 due to the change of the on / off state of the power supply can be understood as a change in rotation direction or rotation direction of the carrier 34 due to the rotation lock and unlocking of the ring gear 35, The rotation locking means (60) locks and unlocks the ring gear (35).

For example, the rotation locking means 60 includes a solenoid 62 installed on the other side of the casing 1 and a solenoid 62 connected to the solenoid 62 to maintain a first position in the power on state of the solenoid 62 A link member 64 configured to be rotated by a spring 65 in a power-off state to a second position and a latching member 67 provided on the other side of the link shaft of the link member 64, And a lock gear 68a and a lock gear train 69a and 69b to be locked and locked to the outer surface of the ring gear 35 at a first position of the link member 64, And a lock gear 68b configured to be unlocked at the two-position.

The solenoid 62 is installed on the upper side of the upper frame 82 provided inside the casing 1.

For example, the solenoid 62 is configured to pull the drive shaft 62a to one side (for example, the solenoid main body side) by a magnetic field when power is supplied (power on), and the drive shaft 62a The pulling force is released.

The link member 64 is installed to be rotatable about a link shaft 66 installed through the upper frame 82.

One side of the link member 64 is connected to the driving shaft 62a of the solenoid 62 by a connecting member 63 and the other side is connected to the upper frame 82 by a spring 65 fixed to the upper frame 82. The spring 65 can be understood as a known coil spring.

At this time, the link member 64 is connected to the first position by the driving shaft 62a of the solenoid 62, and is rotated by the spring 65 in the opposite direction to the first position And is pivotally connected to the second position.

5, when power is supplied to the solenoid 62 in a power-on state, the drive shaft 62a is pulled to one side (e.g., solenoid side) so that the link member 64 And the spring 65 connected to the other side of the link member 64 is extended by the pulling force.

6, the power supply to the solenoid 62 is cut off and the force for pulling the drive shaft 62a toward the solenoid 62 is removed, and the link member 64 The spring 65 is pulled toward the other side (for example, the spring side) by the elastic force to be restored to its original state and is rotated to the second position.

The engaging gear 68a is engaged with the engaging member 67 provided at the other side of the link shaft at the first position and is released from each other at the second position.

For example, the latching gear 68a is a ratchet gear, and the latching member 67 has a latching protrusion 67a inserted or drawn out between the latches of the latching gear 68a.

In this case, it can be understood that the latching member 67 and the latching protrusion 67a have a known detent form.

The engaging projection 67a is easily engaged with the engaging gear 68a even when the center distance between the engaging projection 67a and the engaging gear 68a is not exactly the same as the engaging projection 68a is formed by the latch gear. .

Accordingly, when the power supply is turned off, the latching protrusion 67a can be easily inserted into the latching gear 68a to engage the latching protrusion 67a.

The lock gear 68b is gear-engaged with the outer surface of the ring gear 35. [

The lock gear 68b is driven and coupled through the engagement gear and the lock gear trains 69a and 69b so as to be locked to the outer surface of the ring gear 35 at the first position and unlocked at the second position .

5, when the link member 64 is rotated to the first position in a power-on state, the latching protrusion 67a is inserted into the latching gear 68a, 68a.

At this time, a lock gear 68b driven by a lock gear train 69a, 69b that is gear-engaged (and / or coaxially coupled to) the engagement gear 68a and a lock gear 68b, (35) is locked and the rotation lock state of the ring gear (35) is established.

6, when the power supply is turned off, the link member 64 is rotated to the second position, the latching protrusion 67a is pulled out of the latching gear 68a, The rotation unlocking is performed.

At this time, the lock gear 68b driven and connected through the lock gear trains 69a and 69b that are gear-engaged (and / or coaxially coupled to) the engagement gear 68a is in a rotatable state, and the lock gear 68b And the ring gear 35 is released from the rotation lock state of the ring gear 35 so that the ring gear 35 can be rotated and the elastic restoring force of the reel spring 55 is restored And manual opening / closing of the valve due to manual rotation of the rotary shaft 41 by the manual handle 77 described later can be achieved.

Reference numeral 61 denotes a power supply unit for supplying power to the solenoid 62, and a known power supply unit can be used, so that detailed description is omitted.

FIG. 8 is a perspective view of a spring return type actuator according to another embodiment of the present invention, in which a casing and an upper frame are omitted; FIG. 9 is a perspective view of a spring return type actuator according to another embodiment of the present invention, Fig.

FIG. 10 is a partial perspective view of the spring return type actuator according to another embodiment of the present invention in a state in which the manual handle side is disengaged from the ring gear, FIG. 11 is a horizontal sectional view of FIG. FIG. 13 is a horizontal sectional view of FIG. 12; FIG. 13 is a partial cross-sectional view of the spring return type actuator according to another embodiment in a state in which the manual handle side is drive-

The spring return type actuator according to another embodiment of the present invention is provided with a manual handle 77 so as to be able to manually pivot the rotary shaft 41 of the actuator in the power off state.

To this end, the spring return type actuator further comprises a variable worm axis 70 and a manual handle 77 coaxially coupled to the variable worm axis 70.

For example, the manual handle 77 is linked to the variable worm shaft 70 by a hinge pin 75.

For example, the variable worm shaft 70 is provided on the outer side of the ring gear 35 so as to be engageable with the gear, and is connected to the eccentric cam 73 rotated by the lever 71 at one end, And is configured to be separated or coupled to the outside.

The eccentric shaft 73-1 of the eccentric cam 73 is engaged with the driven bar operating slit 75 attached to the driven bar 74, (74-1).

For example, a movable bar limiting wall (1-1) is formed inside the casing (1) so that a space through which the driven bar (74) can be moved is formed.

For example, the manual handle 77 transmits a manual rotational force to the ring gear 35 through the variable worm shaft 70, which is engaged with the outside of the ring gear 35.

12, when the lever 71 is rotated in the clockwise direction, the lever 71 is rotated in the clockwise direction, for example, in order to rotate the rotary shaft 41 using the manual handle 77, The eccentric cam 73 integrally formed with the eccentric cam 73 eccentrically rotates and the variable worm shaft 70 is gear-engaged with the outer surface of the ring gear 35.

11 and 13, by the eccentric rotation of the eccentric cam 73, the eccentric shaft 73-1 moves the driven bar 74 through the operating slit 74-1 to the lower side in the figure And the variable worm shaft 70 connected to the driven bar 74 moves toward the ring gear 35 and the gear is coupled to the outer surface of the ring gear 35 as the follower bar 74 moves.

In this state, when the manual handle 77 is rotated, the ring gear 35 rotates clockwise or counterclockwise according to the rotational direction, and the carrier 34 rotates in the rotational direction of the ring gear 35 do.

The rotation shaft 41 which rotates integrally with the carrier 41 is rotated in the same direction as the carrier 34 by the rotation of the carrier 34, (55) is wound to rotate while storing the elastic restoring force, or the reel spring (55) is loosened and rotated.

10, the lever 71 is rotated counterclockwise so that the eccentric cam 73 formed integrally with the lever 71 eccentrically rotates while the variable worm shaft 70 is rotated in the ring gear It is preferable that the driving force of the manual handle 77 is not transmitted to the ring gear 35 by separating the ring gear 35 from the outer surface of the ring gear 35.

Reference numeral 36 denotes a fastening bolt for rotating the planetary gear 33 while coupling the carrier 34 to the upper and lower portions of the planetary gear 33 when they are formed separately. (38) is provided in the vertical through hole (37) with a vertical through hole formed at the center of the through hole (41).

Although the present invention has been described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it will be apparent to those skilled in the art that many other obvious modifications can be made therein without departing from the scope of the invention. Accordingly, the scope of the present invention should be interpreted by the appended claims to cover many such variations.

1: casing 2: transparent window
6: Fixing bolt 11: Motor rotation axis
12: drive gear
13, 13a, 13b, 13c, 13d, 13e, 13f: drive gear train
14: driven gear 15: motor
30: planetary gear body 31: sun gear
33: planetary gear 34: carrier
35: ring gear 38: rotation recognition axis
39: rotation state indicating plate 41:
52: stopper 55: reel spring
60: rotation locking means
62: solenoid 62a: drive shaft
63: connecting member 64: link member
65: spring 66: link shaft
67: engaging member 67a: engaging projection
68a: Engaging gear 68b: Lock gear
69a, 69b: Lock gear train
70: Variable worm shaft 71: Lever
73: eccentric cam 77: manual handle
82: upper frame 84: support frame

Claims (4)

A motor installed at one side of the casing, the driving gear being coaxially coupled to the rotating shaft;
A sun gear coupled to the drive gear through a drive gear train, a planetary gear mounted outside the sun gear, a carrier coupled to the planetary gear so that the planetary gear rotates when revolving around the sun gear, A planetary gear body including a ring gear provided outside the planetary gear and gear-coupled;
A pivot shaft configured to rotate integrally with the carrier and to transmit a driving force of the motor to an output side;
A reel spring installed on one side of the outer circumferential surface of the rotating shaft to convert the driving force of the motor into an elastic restoring force and to provide the elastic restoring force so that the rotating shaft can be restored and rotated when the motor is powered off;
A link member connected to the solenoid and configured to rotate in a power-off state to a second position by a spring while maintaining a first position in a power-on state of the solenoid; A lock gear engaged with the engaging member provided on the other side of the shaft and driven by the engaging gear and the lock gear train to be locked with the outer surface of the ring gear at the first position of the link member, And a rotation lock means including a lock gear configured to be unlocked at the time of unlocking the spring return type actuator.
The method according to claim 1,
A variable worm shaft installed on the outer side of the ring gear so as to be able to be engaged with the gear and configured to be separated or connected to the outside of the ring gear by interlocking with the eccentric cam rotated by the lever; And
And a manual handle coupled coaxially to the variable worm shaft and transmitting a manual rotational force to the ring gear via the variable worm shaft having an engaged state outside the ring gear.
The method according to claim 1,
Wherein the rotation locking means comprises:
A solenoid provided on the upper side of the upper frame provided inside the casing,
And a second spring fixed to the upper frame to be rotatable about a link shaft installed through the upper frame, one side of which is connected to the first frame by the drive shaft of the solenoid to rotate to the first position, A link member connected to be pivoted to a second position opposite to the pivotal movement of the link member,
A retaining member provided on the other side of the link shaft and a retaining gear engaged with each other at the first position and releasing from each other at a second position,
And a lock gear that is gear-engaged with the outer surface of the ring gear and is configured to be unlocked at a second position when the lock gear is engaged with the outer surface of the ring gear at the first position, And the spring return type actuator.
The method of claim 3,
Wherein the latching gear is a ratchet gear, and the latching member includes a latching protrusion inserted or withdrawn between the latches of the latching gear.

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