KR101488622B1 - Mode Switching Electric Actuator - Google Patents

Abstract

The present invention relates to an electric actuator and, more specifically, to a mode converting type electric actuator which has a mode converting gear capable of converting a mode disposed inside an electric actuator to enable a user to easily convert from an electric mode to a manual mode; manually open and close a valve by operating a handle on a manual mode position; and easily converting to the electric mode. According to the present invention, a mode converting type electric actuator includes: a main actuator body having an electric motor to open and close a valve disposed inside an upper portion having an accommodation space wherein a plurality of gears are accommodated and formed on a lower portion; an electric gear disposed inside the accommodation space to be rotated by the electric motor; a mode converting gear rotated by the electric gear to transfer a rotary force, and lifted and lowered to be detached from the electric gear; a manual gear detached by the lifting and lowering of the mode converting gear to transfer the rotary force; a valve opening/closing gear rotated by the rotary force of the mode converting gear to open and close a valve; and a converter disposed on a lower portion of the main body to convert a mode of the mode converting gear.

Description

Mode Switching Electric Actuator < RTI ID = 0.0 >

[0001] The present invention relates to an electric actuator, and more particularly, to an electric actuator having a mode switching gear for switching a mode to allow a user to easily switch from a motorized mode to a manual mode, To a mode switching electric actuator capable of manually opening and closing a valve and switching to a motorized mode easily.

Generally, an actuator used for opening and closing valves, such as a butterfly valve and a ball valve, and a rotary device such as a damper, is operated by an electric signal input from the outside, and the electric signal is transmitted through a micro switch , And the valve and the rotary device are rotated or rotated within a range of about 90 degrees to open and close.

In order to prevent rotation due to the reverse torque transmitted from the valve, such an actuator includes a self-locking device using a double worm gear, a manual and electric mode switching device, an overload and overcurrent protection device, And the like, so that the optimum operation state is always maintained.

The manual or electric mode switching device is a device for opening and closing the valve by selecting either the power of the motor or the manual operation of the handle in opening or closing the valve or the rotary device, Open or close the motor power or number

It can be done by work.

In this case, when electricity is input to the motor, it automatically switches from manual mode to motorized mode.

An example of such a technique is shown on the basis of a coupling state diagram at the time of manual operation by the switching lever as shown in Fig. 1 and a sectional view of the concave side of Fig. 2 and Fig.

As shown in the figure, the primary worm 31 is installed in the handle cover 11 coupled with the buddy and rotates by receiving power from the motor directly connected to the driving motor 20. A handle shaft 60 supported horizontally by a handle cover 11 of the birdie and connected to an external manual handle 40 and having a fixed clutch 50 fixedly installed at an end thereof; A secondary worm 81 provided coaxially with the handle shaft 60 for rotating the primary worm wheel 90 for opening and closing the valve; The first worm 31 and the primary worm 81 are axially rotatably connected to the worm 81 and the sprue 82 so as to be engaged with the primary worm 31, A car worm wheel 90; A movable clutch 100 axially movably supported on the secondary worm 81 between the primary worm wheel 90 and the fixed clutch 50; The movable clutch 100 is horizontally moved while being rotated together with the torsion spring 150 and the stopper plate 140 in the switching lever 110 rotatably supported on the handle cover 11 of the birdie And a yoke 120 selectively engaged with the fixed clutch 50 and the primary worm wheel 90.

Both ends of the yoke 120 constitute a protrusion 121 at both ends so as to form a space for accommodating the movable clutch 100, and the yoke 120 is fixed at its both ends by a bolt 190, The protrusion 121 is provided with a guide pin 122 to be fitted into the guide groove 104 of the movable clutch 100 and a pin 123 as a stopper for mounting the stopper 142 is provided outside the one guide pin 122 Install it.

The shaft portion 30 of the primary worm 31 is installed in the handle cover 11 and the upper end of the shaft portion 30 is directly connected to the drive motor 20 and the lower end of the shaft portion 30 is rotated by the motor, A primary worm 31 that is gear-connected to the primary worm wheel 90 is integrally formed.

The handle shaft 60 is horizontally supported on the handle cover 11 so that the manual handle 40 is fixed to the outer side via the pin 160 and the fixed clutch 50 is fixed to the inside end via the pin 170. [ do.

A pair of clutch engagement protrusions 51 are formed on the inner surface of the fixed clutch 50 at opposed positions and a groove 52 into which the coil spring 130 can be inserted is integrally formed .

The secondary worm 81 is provided at an appropriate interval so as to be able to engage the coil spring 130 in a straight line with the handle shaft 60. The secondary worm 81 is provided at one side thereof with a secondary And a sprue 82 is formed at the end of the shaft portion 80 of the secondary worm 81 so as to be interlocked with the movable clutch 100. [

The primary worm wheel 90 is fitted to the shaft portion 80 of the secondary worm 81 and idles to be connected to the gear portion of the primary worm 31. The primary worm wheel 90 has a pair of The clutch engaging projection 91 is formed at the opposed position.

The movable clutch 100 inserted into the secondary worm 81 is formed integrally with a cylindrical sprue 101 which is gear-connected to the sprue 82 at its center inner diameter, And a pair of protrusions 102 and 103 are integrally formed on both sides thereof at positions corresponding to the clutch engagement protrusions 51 and 91 described above, The groove 104 is integrally formed.

A coil spring 130 is compression-tacked between the movable clutch 100 and the groove 52 of the fixed clutch 50. A spline 101 is formed on an inner diameter portion of the movable clutch 100 so as to form a spline 82 on the shaft portion 80 of the secondary worm and to be engaged with the spline 82.

First, when manually opening and closing the valve, the switching lever 110 is turned to the manual position (vertical position in the drawing).

The yoke 120 fixed to the switching lever 110 is also rotated together with the switching lever to move the movable clutch 100 toward the fixed clutch 50 through the guide pin 122 so that the protrusions 51, The rotational force of the fixed clutch is transmitted to the movable clutch through the engagement of the projections 51 and 102 and the rotational force of the movable clutch is transmitted to the secondary worm 81 through the springs 101 and 82 to be rotated in the left- The opening and closing force is outputted.

At this time, the other projections 103 of the movable clutch 100 and the projections 91 of the primary worm wheel 90 are separated from each other to interrupt the electric power, and the coil spring 130 is compressed.

When the manual handle 40 is rotated in this state, the rotational force is transmitted from the handle shaft 60 to the fixed clutch 50, the movable clutch 100, the spline shaft of the secondary worm 81, the secondary worm wheel 70 So that the valve can be manually opened and closed.

At this time, since the primary worm wheel 90 installed in the secondary worm 81 is idling only, the power of the motor 20 is transferred only to the primary worm wheel 90, but is not transferred any more.

On the other hand, when switching to the electric mode, the electric power is inputted to the motor without any additional lever operation, and the primary worm wheel automatically drops the stopper to switch to the electric mode.

That is, when the power is applied in the manual mode, when the primary worm wheel 90 idles on the secondary worm 81 simultaneously with the rotation of the motor, the projection 91 on the side thereof restrains the yoke 120 The stopper plate 140 is lifted by the torsional force of the torsion spring 150 and the locking state of the yoke 120 is released.

The movable protrusions 103 are engaged with the engagement protrusions 91 of the primary worm wheel 90 while the movable clutch 100 is pushed by the spool by the resilient force of the coil spring 130 which has been compressed at the same time.

Therefore, the power of the motor is transmitted from the primary worm to the primary worm wheel to the sprue shaft of the movable clutch to the secondary worm to the secondary worm wheel, and the actuator is electrically opened and closed by the motor.

In this case, even if the manual handle is rotated, the fixed and movable clutches are spaced apart from each other, so that the handle shaft and the fixed clutch idly rotate only in place, and the rotational force is not transmitted to the secondary worm.

However, this type of method is a type in which the switching lever is exposed to the outside, so that the wrong operation may occur due to wrong operation of the other person, and the number of parts and the number of stitching are increased due to coupling the switching lever to the outside.

In addition, since the structure is complicated and the size of the actuator is large, it is not easy to manufacture.

The switching means for switching the mode inside the electric anuter is provided so that the user can easily switch from the electric mode to the manual mode and manually open and close the valve by the operation of the steering wheel in the manual mode position. And to provide a mode switching electric actuator capable of switching.

In the mode switching type actuator according to the present invention, an actuator body including an electric motor for opening and closing a valve and having a housing space in which a plurality of gears are accommodated in a lower portion, A mode switching gear which is rotated by the electric gear to transmit a rotational force and is lifted and lowered to be engaged with and detached from the electric gear; A valve opening / closing gear that is rotated by the rotational force of the mode switching gear to open and close the valve, and switching means provided in the lower portion of the main body for switching the mode of the mode switching gear.

In the present invention, the mode switching gear may include a moving shaft which is moved upward and downward by a spring provided at an upper portion thereof and whose lower end protrudes to the outside, and a moving shaft fixed to the moving shaft, 1 gear and a second gear having a larger diameter than the first gear and receiving power from the drive gear or the manual gear under the first gear.

In the present invention, it is preferable that the manual gear is a worm gear driven by a driving knob.

In the present invention, the switching means is a plate-shaped one fixed to the lower portion of the main body so as to be rotated, and the other end is bent to be rotated from the outside so as to have a protruding handle at its end, desirable.

In the present invention, it is preferable that a second switchgear further provided on one side of the valve opening / closing gear for opening and closing the valve is further provided.

The mode switching electric actuator according to the present invention is provided with a mode switching gear for switching the mode inside the electric anuter, so that the user can easily switch from the electric mode to the manual mode, Can be manually opened and closed, and the mode can be easily switched to the electric mode.

Further, the mode switching electric actuator according to the present invention has the effect of being easily switched to electric or manual by rotation of the switching means.

Further, the structure of the mode switching gear is simple, so that it is easy to manufacture, is easy to maintain, and has an excellent effect of miniaturizing the actuator.

Further, since the opening and closing of the valve is made by the meshing of the gear, there is an excellent effect that the opening and closing of the valve can be precisely controlled.

In addition, there is an effect that the user can easily select and combine the valve shaft according to the position or size of the valve shaft.

1 is a horizontal sectional view showing a mode switching device by a conventional lever,
FIG. 2 is a vertical sectional view of the worm and the worm wheel of FIG. 1,
FIG. 3 is a vertical sectional view showing the movable clutch and the yoke shown in FIG. 1,
4 is a use state diagram schematically showing a state in which an actuator of the present invention is applied;
5 is a bottom perspective view showing the actuator of the present invention.
Fig. 6 is a perspective view of a portion of Fig. 5 cut away. Fig.
FIG. 7 is a sectional view of the state before use for mode switching of FIG. 6; FIG.
8 is a plan view schematically showing the operating state of Fig. 7; Fig.
FIG. 9 is a sectional view of the state after use of the mode switching of FIG. 7; FIG.
FIG. 10 is a plan view schematically showing the operating state of FIG. 9; FIG.
11 is a plan view schematically showing another embodiment of the present invention.

Hereinafter, the mode switching electric actuator according to the present invention will be described in detail with reference to the drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

4, the mode switching electric actuator 1000 according to the present invention is used for opening and closing a valve 1004 of a pipe 1002 through which chemical or high-pressure water vapor flows, The shaft 1006 can be automatically opened and closed, and can be manually opened and closed manually in an emergency.

5 to 7, the mode switching electric actuator 1000 according to the present invention includes a main body 1100, a transmission gear 1200 provided in the main body 1100, a mode switching gear 1400, A manual gear 1600, a valve opening / closing gear 1800, and switching means 1900 for switching modes of the mode switching gear 1400.

The main body 1100 includes an accommodation space 1120 in which an electric motor M for opening and closing the valve 1002 is provided in an upper portion and a plurality of gears are accommodated in a lower portion thereof.

Further, a fixing plate 1140 for forming the accommodating space 1120 with the electric motor M is further provided, and a through hole 1160 for moving the mode switching gear 1200 up and down is provided below the main body 1100 .

The transmission gear 1200 is provided under the electric motor M and is rotated by the electric motor M.

The transmission gear 1200 is a known spur gear and may be provided with gears of various types capable of transmitting a rotational force according to the user's convenience.

The mode switching gear 1400 is rotated by the transmission gear 1200 to transmit the rotating force and is lifted and lowered to be detached from the transmission gear 1200.

The mode switching gear 1400 is fixed to the fixing plate 1140 and has an upper portion inserted into a cover 1420 in which a spring 1440 is received and is raised and lowered by the spring 1440, And a moving shaft 1460 having an end protruded to the outside.

The first gear 1482 is fixed to the middle of the moving shaft 1460 and transmits power to the valve opening and closing gear 1800. The first gear 1482 is larger than the first gear 1482 And a second gear 1484 having a diameter is provided.

The second gear is engaged with the transmission gear 1200 or the manual gear 1600 to receive power.

In addition, the first and second gears 1482 and 1484 are configured as spur gears, and may be provided in various other gears according to the user's selection.

The manual gear 1600 includes a worm gear 1660 which is detachably attached to the mode switching gear 1400 to transmit rotational force and a shaft 1620 protruding from the worm gear 1660 and projecting to the outside of the main body, And a driving knob 1640 coupled to the shaft 1620 and driving the shaft 1620 and the worm gear 1660 from outside the main body 1100.

The manual gear 1600 may be provided in various gears that can transmit power at right angles, rather than the worm gear type, at the user's option.

The valve opening and closing gear 1800 is provided with a driving gear 1820 that always contacts with the second gear 1484 of the mode switching gear 1600 to receive power, And an insertion groove 1860 into which the insertion hole 1006 is inserted.

A lower gear 1840 having a diameter smaller than that of the driving gear 1820 is provided below the driving gear 1820 of the valve opening and closing gear 1800 and an outer valve shaft 1006 It is more preferable that the insertion groove 1860 is inserted.

One end of the switching means 1900 is fixed to be fixed by the fixing means 1920 and the other side is rotated to open and close the through hole 1160 provided in the lower portion of the main body 1100, And is provided with a plate provided with a protruding knob 1940.

It is preferable that the other side of the switching means 1900 is fixed to the main body 1100 by a separate fixing means 1960.

The fixing means 1920 and 1960 are preferably bolts.

The coupling relationship and the operating relationship of the mode switching actuator of the present invention will be described in detail as follows.

First, a passive gear 1600 which is rotated by a driving knob 1640 is provided on one side in the lower portion of the main body 1100.

The lower portion of the moving shaft 1460 of the mode switching gear 1400 is inserted into the through hole 1160 and is coupled to the lower portion of the main body 1100 in a protruded state.

At this time, the switching means 1900 for controlling the mode switching gear 1400 is positioned to be rotated as shown in FIG. 9 with one side fixed to the fixing means to facilitate the coupling of the mode switching gear 1400.

Of course, the second gear 1484 of the mode switching gear 1400 keeps the worm gear 1660 of the manual gear 1600 engaged with each other.

The driving gear 1820 of the valve opening / closing gear 1800 is engaged with the first gear of the mode switching gear 1400 in an interlocking manner.

At this time, the insertion groove 1860 of the valve opening / closing gear 1800 is positioned such that the valve shaft 1006 inserted in the lower portion of the main body 1100 is inserted.

The fixing plate 1140 to which the electric motor M is fixed is fixed to the upper portion of the main body 1100 in a state where the mode switching gear 1400, the manual gear 1600, and the valve opening and closing gear 1800 are coupled to each other, do.

At this time, the transmission gear 1200 is positioned at an upper portion capable of interlocking with the second gear 1484 by the elevation of the mode switching gear 1400.

The upper part of the moving shaft 1460 of the mode switching gear 1400 is inserted and inserted into the cover 1420 fixed to the fixing plate 1140 and coupled with the spring 1440.

When the user pushes the protruding moving shaft 1460 of the mode switching gear 1400 into the through hole 1160 and at the same time rotates the switching means 1900 so as to return and connects the other side of the switching means 1900 to the fixing means 1960).

This is to prevent the switching means from being disengaged from the main body 1100 by an external shock or vibration or a simple mistake of the user.

7 and 8, the mode switching electric actuator 1000 coupled to each other as described above maintains a state in which the valve can be automatically opened and closed by the electric motor M. [

This is because the movable shaft 1460 of the mode change gear 1400 is maintained in the elevated state by the switching means 1900 so that the second gear 1484 of the transmission gear 1200 and the mode change gear 1400 always rotate The contact state is maintained.

Therefore, when the electric motor M is driven, the transmission gear 1200 rotates the second gear 1484 of the mode switching gear 1400, and the second gear 1484 rotates the first gear And the valve opening / closing gear 1800 is rotated by the rotation of the first gear 1484.

The valve shaft 1006 inserted into the insertion groove 1860 of the valve opening and closing gear 1800 is inserted into the main body 1100 by the rotation of the valve opening and closing gear 1800, Can be opened and closed.

9 and 10, when the valve 1004 is opened and closed automatically as described above, or when the valve 1004 is manually opened or closed when the electric motor M fails.

First, the user releases the fixing means 1960 fixed to the other side of the switching means 1900 and then rotates the switching means 1900 using the protruding knob 1940.

At this time, when the through hole 1160 is opened by the rotation of the switching means 1900, the mode switching gear 1400 is lowered by the spring 1440 provided in the cover 1420, 1460 are projected to the outside through the through hole 1160. [

The second gear 1484 of the mode switching gear 1400 falls off the transmission gear 1200 and descends and meshes with the worm gear 1660 of the manual gear 1600. [

Of course, the first gear 1482 of the mode switching gear 1400 maintains the interlocked state with the driving gear 1820 of the valve opening / closing gear 1800.

The mode switching gear 1400 is simply lowered by the rotation of the switching means 1900 as described above and drives the driving knob 1640 provided outside the main body 1100 in a state of being interlocked with the manual gear 1600.

At this time, the worm gear 1660 of the manual gear 1600 is rotated by the drive knob 1640, and the second gear 1484 of the mode switching gear 1400, which meshes with the manual gear 1600, The first gear 1482 provided on the second gear 1484 is rotated and the valve opening and closing gear 1800 is rotated by the rotation of the first gear 1482.

The valve shaft 1006 inserted into the insertion groove 1860 of the valve opening and closing gear 1800 is inserted into the main body 1100 by the rotation of the valve opening and closing gear 1800, Can be opened and closed.

Therefore, the mode switching electric actuator according to the present invention is easy to switch to electric or manual by rotation of the switching means.

Further, the structure of the mode switching gear is simple, so that it is easy to manufacture, easy to maintain, and the actuator can be downsized.

Further, since the valve is opened and closed by engagement of the gear, the opening and closing of the valve can be precisely controlled.

11 is a plan view schematically showing another embodiment of the present invention. As shown in FIG. 11, the configuration and operating relationship of the mode switching electric actuator of the embodiment of FIGS. 4 to 10 of the present invention A detailed description thereof will be omitted.

11, the second opening and closing gear 1800-1 is interlocked with the lower gear 1840 provided in the valve opening and closing gear 1800, and the second opening and closing gear 1800-1 An insertion groove 1860-1 into which the valve shaft 1006 is inserted is further provided.

The second opening and closing gear 1800-1 provided as described above is rotated by the rotation of the valve opening / closing gear 1800 rotated by the rotation of the mode switching gear 1400 to rotate the second opening and closing gear 1800-1 .

This can be easily selected and combined by the user depending on the position or size of the valve shaft.

Of course, according to the user's selection, no insertion groove is formed in the valve opening / closing gear, and an insertion groove can be formed only in the second opening and closing gear.

It is to be understood that the present invention is not limited to the above-described embodiment, and variations and modifications may be made without departing from the scope of the present invention as set forth in the appended claims. It will be understood by those of ordinary skill in the art that various changes and modifications may be made without departing from the scope of the present invention.

1000: actuator 1002: tube
1004: valve 1006: valve shaft
1100: main body 1120: accommodation space
1140: Fixing plate 1200: Electric gear
1400: Mode switching gear 1420: Cover
1440: spring 1460: moving shaft
1482: first gear 1484: second gear
1600: Manual gear 1620: Axis
1640: drive handle 1660: worm gear
1800: valve opening / closing gear 1820: drive gear
1840: Lower gears 1860, 1860-1: Insert groove
1800-1: second opening and closing gear

Claims (5)

An actuator body having an electric motor for opening and closing a valve, the actuator body having a housing space in which a plurality of gears are housed,
A transmission gear provided in the accommodation space and rotated by the electric motor,
And an upper portion is inserted into a cover which is fixed to the fixing plate to be detachable from the power transmission gear and is received in a spring, and is lifted and lowered by the spring, And a second gear having a larger diameter than the first gear is provided under the first gear, and a second gear having a larger diameter than the first gear is provided under the first gear, A mode switching gear,
A manual gear which is detachably attached to the mode switching gear to transmit the rotational force at a right angle and has a shaft protruding to the outside of the main body and a drive handle coupled to the shaft to drive the shaft outside the main body,
And a drive gear which is constantly in contact with the second gear of the mode switching gear to receive power, and an insertion groove into which an external valve shaft is inserted is provided inside the drive gear, A valve opening / closing gear which is provided at an inner side of the lower gear and has an insertion groove into which an outer valve shaft is inserted and which is rotated by the rotational force of the mode switching gear to open and close the valve,
A plate having one side fixed to rotate by a fixing means for opening and closing a through hole provided in a lower portion of the main body and the other side rotated and being bent upwardly corresponding to the shape of the main body and having a protruding handle, And switching means provided at a lower portion of the main body to switch a mode of the gear.
delete The method according to claim 1,
Wherein the manual gear is a worm gear driven by a driving knob.
delete The method according to claim 1,
Further comprising a second switch for opening and closing the valve further provided on one side of the valve opening / closing gear.

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