KR100501246B1 - Mode exchanger of electric actuator for a valve - Google Patents

Abstract

The present invention relates to a mode switching device for a valve opening and closing electric actuator for automatically switching the mode switching device of the valve opening and closing actuator for the automatic operation manually by pulling the conventional handle, not lever.

To do this, remove the yoke and the

Clutch holder to move in the secondary worm shaft direction along the handle cover horizontal groove of the handle cover coupled to the buddy when the movable clutch and the fixed clutch is wrapped in the upper and lower separable from the outer circumferential surface and pull the handle to the outside for the manual mode; And

The second worm by the torsion spring to block the power transmission of the primary worm wheel and the movable clutch in the manual mode is coupled to the screw holder of the bolt guided to the guide groove of the movable clutch by the screw coupling in the clutch holder to rotate the shaft It comprises a clutch stopper placed in the axial direction of the.

Description

Mode changer of electric actuator for valve opening and closing

The present invention is to switch the mode of the electric valve for opening and closing the valve (maneuvering mode) from the electric mode to the manual mode by pulling the manual handle, when the motor is operated in the manual mode position of the valve opening and closing electric actuator for switching to the electric mode automatically It relates to a mode switching device.

More specifically, the valve opening and closing motor which enables the valve to be switched from the electric mode to the manual mode by pulling the handle when the actuator is operated from the electric mode to the manual mode by using the manual mode switching handle protruding to the outside of the buddy. It relates to a mode switching device of the actuator.

In general, actuators used to open and close valves such as butterfly valves and ball valves, and rotary devices such as dampers are operated by an electrical signal input from the outside, and the electrical signals are generally transmitted through a micro switch. The valve and the rotary device are opened and closed by rotating the motor or manually in the range of about 90 °.

In addition, these actuators have a self-locking device with dual worm gears, manual and electric mode switching devices, overload and overcurrent protection devices, and condensation and condensation water protection to prevent rotation by reverse torque transmitted from the valve. Built-in heater, etc. for maintaining the optimum operating state at all times.

Dual, manual and electric mode switching device is a device that can open and close the valve by selecting any one of the power of the motor or the handle manual operation in opening and closing the valve or rotary machine, depending on whether the manual / motor mode switching Opening and closing can be performed by motor power or by hand. In this case, when electricity is input to the motor, it automatically switches from manual mode to electric mode. An example of such a technique may be based on a coupling state diagram at the time of a manual operation by the switching lever as shown in FIG. 1 and a main sectional side view of FIGS. 2 and 3.

A primary worm 31 installed in the handle cover 11 coupled to the buddy and being directly connected to the motor 20 as a driving source to rotate by receiving power from the motor;

A handle shaft 60 horizontally supported by the handle cover 11 of the buddy and connected to an external manual handle 40 and having a fixed clutch 50 fixedly formed at an end thereof;

A secondary worm 81 installed coaxially with the handle shaft 60 to rotate the primary worm wheel 90 for opening / closing the valve;

1 which rotates in place by the motor 20 by being engaged with the primary worm 31 so as to be idle between the worm 81 and the spline 82 on the secondary worm 81 shaft. A car worm wheel 90;

A movable clutch (100) axially movable on the secondary worm (81) between the primary worm wheel (90) and the fixed clutch (50);

It is constructed with the torsion spring 150 and the stopper plate 140 on the switching lever 110 rotatably supported by the handle cover 11 of the buddy to rotate the movable clutch 100 horizontally while rotating therewith. And a yoke 120 that selectively engages with the fixed clutch 50 and the primary worm wheel 90. Yoke 120 is fixed to the coupling lever 110 to the lower end of the bolt 190, both ends of the yoke 120 to form a protrusion 121 to form a space for receiving the movable clutch 100, each Protruding portion 121 is provided with a guide pin 122 for fitting into the guide groove 104 of the movable clutch 100, the outer side of the one guide pin 122 pin 123, which is a locking projection for the stopper 142 installation Install.

The shaft portion 30 of the primary worm 31 is installed inside the handle cover 11, and the upper end thereof is directly connected to the motor 20 as the driving source, and the lower end is rotated by the motor by being supported by the buddy, and the peripheral edge thereof. The primary worm wheel 90 and the primary worm 31 which is toothedly connected are formed integrally therewith.

The handle shaft 60 is horizontally supported by the handle cover 11 so that the manual handle 40 is fixed to the outside thereof through the pin 160, and the fixing clutch 50 is installed at the inner end thereof through the pin 170. do.

On the inner surface of the fixed clutch 50, a pair of clutch biting projections 51 are formed at opposite positions, and an inner groove 52 into which the coil spring 130 can be inserted is integrally formed therein. .

The secondary worm 81 is installed at a suitable interval to fit the coil spring 130 in a straight line with the handle shaft 60, the secondary side that is geared to the secondary worm wheel 70 for valve opening and closing on one side thereof. The worm 81 is integrally formed, and the spline 82 is formed at the end of the shaft portion 80 of the secondary worm 81 so as to interlock with the movable clutch 100.

The primary worm wheel 90 is interlocked with the shaft portion 80 of the secondary worm 81, and is connected to the gear portion of the primary worm 31, and has a pair of pairs on one side (movable clutch side). The clutch engagement protrusion 91 is formed at the opposite position.

The movable clutch 100 fitted to the secondary worm 81 has a cylindrical spline 101 integrally formed with the spline 82 at the center inner diameter thereof in an axial direction along the spline 82. It is possible to move left and right and at the same time to transmit the rotational force, a pair of projections (102, 103) are formed integrally at the position corresponding to the clutch clutch projections (51,91) described above on both sides, the guide between the projections The groove 104 is integrally formed.

The coil spring 130 is compressed and compressed between the movable clutch 100 and the recess 52 of the fixed clutch 50. A spline 82 is formed on the shaft portion 80 of the secondary worm, and a spline 101 engaged with the spline 82 is formed in the inner diameter portion of the movable clutch 100.

When using this, first, when manually opening and closing the valve, the switching lever 110 is rotated to the manual position (vertical state in the drawing).

In this way, the yoke 120 fixed to the switching lever 110 also rotates together with the switching lever, and moves the movable clutch 100 to the fixed clutch 50 through the guide pin 122, so that the protrusions 51 and 102 of the bite clutch are moved. Are coupled to each other so that the rotational force of the fixed clutch is transmitted to the movable clutch through the bite of the protrusions 51 and 102, and the rotational force of the movable clutch is transmitted to the secondary worm 81 through the splines 101 and 82 to rotate left and right. The opening and closing force is output.

At this time, the other side projection 103 of the movable clutch 100 and the projection 91 of the primary worm wheel 90 are spaced apart from each other to block the transmission, and the coil spring 130 is compressed.

When the manual handle 40 is rotated in such a state, the rotational force is handle shaft 60 → fixed clutch 50 → movable clutch 100 → spline shaft of secondary worm 81 → secondary worm wheel 70. Can be opened and closed manually.

At this time, since the primary worm wheel 90 installed in the secondary worm 81 is only idling, the power of the motor 20 is transmitted only to the primary worm wheel 90, and is no longer transmitted.

On the contrary, when the electric motor is to be switched to the electric mode, the primary worm wheel automatically switches to the electric mode by knocking down the stopper when power is input to the motor without a separate lever operation.

That is, when the power is applied in the manual mode, the primary worm wheel 90 is installed in the secondary worm 81 at the same time as the rotation of the motor while idling, the projection 91 of the side restrains the yoke 120 and The stopper plate 140 hits the stopper plate 140, and at this moment, the stopper plate 140 is laid down by the torsional force of the torsion spring 150, thereby releasing the locked state of the yoke 120.

As the movable clutch 100 is pushed from the spline by the elastic force of the coil spring 130 which has been simultaneously compressed, the bite protrusion 103 of one side thereof is coupled to the bite protrusion 91 of the primary worm wheel 90.

Therefore, the power of the motor is transmitted from the primary worm to the primary worm wheel to the spline shaft of the actuating clutch to the secondary worm to the secondary worm wheel so that the actuator is electrically opened and closed by the motor.

At this time, since the fixed and movable clutches are spaced apart from each other even when the manual handle is rotated, the handle shaft and the fixed clutch are idle only in place, and the rotational force is not transmitted to the secondary worm.

However, this type of switching lever is exposed to the outside, which can cause malfunction due to mistouch by others, and the increase in the number of parts and afforestation labor associated with exposing the switching lever to the outside contributed to the cost increase.

The present invention is to solve this problem, an object of the present invention is to change the mode of the valve opening and closing actuator in the lever, the lever is required by changing the conventional handle (not limited, but about 5 to 10mm) in the forward direction slightly. It is intended to provide a mode switching device that is easy to use and economical.

It is another object of the present invention to provide a mode switching device in which the tip of a clutch stopper, which connects the clutch power when converting from the manual mode to the electric mode, comes to the gear teeth so that there is no damage to the wheel while operating in the electric mode.

To this end, the present invention eliminates the yoke and the switching lever, and adds the clutch holder.

The clutch holder wraps the movable clutch and the fixed clutch on the outer circumferential surface of the upper and lower types, and when the handle is pulled out in the manual mode, the clutch holder moving in the axial direction along the horizontal groove of the handle cover coupled to the buddy is first Separate it with the worm wheel and engage it in the fixed clutch to operate in manual mode.

The screw is coupled to the clutch holder so that the bolt head can be rotated about the shaft which is guided to the guide groove of the movable clutch by the torsion spring so as to block the power transmission of the primary worm wheel and the movable clutch in the manual mode. It comprises a clutch stopper placed in the direction.

That is, the present invention is installed inside the buddy of the valve opening and closing actuator is directly connected to the motor as a drive source by rotating the primary worm receives power from the motor, and is supported horizontally on the buddy is connected to the external manual handle and its end A secondary worm provided with a handle shaft on which a fixed clutch is formed, a secondary worm gear coaxially with the handle shaft, and a secondary worm gear for rotating the secondary worm wheel for opening and closing the valve; A primary worm wheel that is constructed so as to be connected to the primary worm and rotates in position by a motor, and a movable clutch axially movable in a secondary worm shaft portion between the primary worm wheel and the fixed clutch; It is constructed on a changeover lever rotatably supported by the buddy, and rotates the movable clutch while rotating with it, thereby selectively fixing with the fixed clutch and the primary worm wheel. In the mode switching device of the valve opening and closing actuator consisting of a yoke to be coupled to the

Eliminating yokes and shift levers;

Clutch holder to move the movable clutch and the fixed clutch in the outer periphery in the vertical separation type and to move in the axial direction of the secondary worm along the horizontal groove of the handle cover coupled to the buddy when pulling the handle to the outside in the manual mode;

A screw threaded at the clutch holder to guide the bolt head to the guide groove of the movable clutch;

A clutch stopper coupled to the screw thread of the bolt so as to be rotatable in the axial direction, the clutch stopper being placed in the axial direction of the secondary worm to block power transmission of the primary worm wheel and the movable clutch in the manual mode; And

The purpose of the present invention is to provide a mode switching device for an electric actuator for opening and closing a valve including a torsion spring which is disposed on a thread of a bolt and provides an elastic force to space the primary worm wheel and the movable clutch when the clutch stopper is in the manual mode.

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, and the same components as in the middle are denoted by the same reference numerals, and thus descriptions thereof will be omitted.

Figure 4 is a horizontal cross-sectional view of the electric mode state by the motor of the present invention shown in the same state as in Figure 1, Figure 5 is a horizontal cross-sectional view in the manual mode, Figure 6 is a vertical cross-sectional view of Figure 4, Figure 7 is Figure 5 A primary worm (31) mounted in the handle cover (11) of the actuator and directly connected to the motor (20) as a driving source to rotate by receiving power from the motor;

A handle shaft 60 horizontally supported by the handle cover 11 of the buddy and connected to an external manual handle 40 and having a fixed clutch 50 at its end;

A secondary worm shaft portion 80 installed coaxially with the handle shaft 60 and having a secondary worm 81 for rotating the secondary worm wheel 70;

A primary worm wheel 90 which is installed to be rotatable in the shaft portion 80 of the secondary worm 81 so as to be connected to the primary worm 31 and rotates in place by the motor 20;

A movable clutch (100) which is arranged to be axially movable in the axial direction on the secondary worm (81) between the primary worm wheel (90) and the fixed clutch (50);

The movable clutch 100 and the fixed clutch 50 are enclosed in the upper and lower separable forms around them and the handle cover horizontal groove 12 inside the handle cover 11 coupled to the buddy 10 when the handle is pulled out in the manual mode. A clutch holder horizontal portion 204 along which the clutch holder 200 moves in the axial direction of the secondary worm 81;

A bolt 210 coupled to the clutch holder 200 to guide the bolt head 211 to the guide groove 104 of the movable clutch 100;

The screw portion 212 of the bolt 210 is rotatably coupled to the shaft to settle in the axial direction of the secondary worm 81 to block power transmission of the primary worm wheel 90 and the movable clutch 100 in the manual mode. All animal forest clutch stopper 220 and;

Put the bushing on the threaded portion 212 of the bolt 210 and install the stopper 220 on the bushing, and then put the torsion spring 150 around the bushing and tighten the nut, so that the clutch stopper 220 is the primary worm wheel in the manual mode. It comprises a torsion spring 150 that provides an elastic force to space the 90 and the movable clutch 100. Reference numeral 53 is a wheel wheel which functions to protrude on the outer circumferential surface of the tip of the fixed clutch 50 to contact the bending jaw 205 of the clutch holder 200 to limit movement. 201 is a vertical bar protruding perpendicular to the outer circumferential surface of the clutch holder 200 to support both ends of the torsion spring 150.

Figure 8a is a perspective view of the main part of the clutch holder in the automatic mode of the present invention, Figure 8b is a perspective view of the main part showing the operation in the manual mode of the present invention, Figure 9 is an explanatory view showing the operation of the clutch holder, manual handle 40 Handle shaft 60 is transmitted to the power in the buddy 10 shown in Figs. 4 to 7 supporting the handle cover 11, to couple the handle shaft 60 and the power to the clutch clutch A clutch holder 200 comprising an upper holder 202 and a lower holder 203 to surround the actuated clutch 100 and the fixed clutch 50 up and down at an outer circumference, and forms a clutch holder 200. The upper and lower outer peripheries of each of the upper and lower holders 202 and 203 bend outwardly the bending bar 201 bent in the radial direction, and the bending bar 201 vertically bends the vertical end portion 221 of one end of the clutch stopper 220. The both ends of the torsion spring 150 supported by the bolt 210 together with And configured. Reference numeral 207 is a guide groove jaw placed in the guide groove 104.

The secondary worm 81, which receives or blocks power through the handle shaft 60 and the clutch means, is geared to the secondary worm wheel 70 for opening and closing the valve, and the secondary worm shaft portion 80 of the secondary worm 81 ) Is bonded to the primary worm wheel (90). The primary worm wheel 90 and the movable clutch 100 are configured to transmit or block power by the bite protrusions 91 and 103 to act as a clutch clutch. The movable clutch 100 and the fixed clutch 50 are also coupled to and separated from each other of the protrusions 102 and 51 to transmit or cut power. The outer peripheral surfaces of the movable clutch 100 and the fixed clutch 50 are covered with a clutch holder 200 so as to be moved at the same time, and bolts 210 are provided on the surfaces of the upper holder and the lower holder 202 and 203 forming the clutch holder 200. By using the clutch stopper 220 is configured so that the first worm wheel 90 is not bite or bite. Reference numeral 101 denotes a spline formed at the inner diameter of the movable clutch 100 that meshes with the spline 82 formed on the shaft portion of the secondary worm 81. The protrusion 91 formed on the side of the primary worm wheel 90 has a curved groove on the side thereof, and the protrusion 103 coupled to and separated from the primary worm wheel 90 forms an arc shape so that the protrusion 91 can be coupled and separated at a mutually coaxial position. do.

The tip of the mode switching stopper 220 forms an upward inclined surface 222, and the tip of the inclined surface 222 forms a groove 223 so as to be placed in a gear of the primary worm wheel 90 when placed in the longitudinal direction. The vertical bar 221 is in contact with the vertical bar 201, which is a bending bar.

10 is an exploded perspective view of the pre-animated forest clutch holder 200 of the present invention, the pre-animal forest clutch holder 200 is a clutch upper holder 202 and the clutch lower holder 203 is coupled up and down, each holder (202, 203) is A horizontally extending horizontal portion 204 is formed on the side of the rear portion, and one horizontal portion 204 has a hole, one is burned, and then tapped to form a female screw, and has the same shape holder. The two are joined up and down as shown in FIG. 10 and tightened with bolts to form a single holder. The horizontal portion 204 coupled up and down is configured to move integrally along the horizontal groove 12 shown in FIGS. 4 and 5 of the handle cover 11 to maintain the horizontal position. 205 is a bending jaw that is bent at the middle of each of the upper and lower holders 202 and 203 so as to be smaller in diameter and in contact with the wheel wheel 53 of the fixed clutch 50 to move. Denoted at 208 is a bending jaw surrounding the end of the fixing clutch 50, 206 is a screw groove to which the threaded portion 212 of the bolt 210 is screwed. Reference numeral 207 is a guide groove jaw placed in the guide groove 104.

The present invention configured as described above is spaced apart from the handle cover 11 when the manual handle 40 is pulled forward in the axial direction as shown in FIGS. 5 and 7 and 8b in the electric mode as shown in FIGS. 4, 6 and 8a. You are pushed away for distance (D). The handle cover 60 is integrally coupled to the handle shaft 60 to the handle cover 11, and the clutch holder coupled to the upper and lower outer peripheries of the fixing clutch 50 fixed to the outer periphery of the handle shaft 60. The head of the bolt 210 screwed to the screw groove 206 of the 200 is placed in the guide groove 104 of the movable clutch 100. Therefore, when the user pulls the manual handle 40 to make the manual mode in the electric mode, the handle shaft 60 and the handle shaft 60 integral with the manual handle 40 are pushed together as shown in FIGS. 5 and 7. The clutch holder 200 fixed to the fixed clutch 50 which is rotatable integrally also moves from the position P1 shown in FIG. 4 to the position P2. Then, as shown in FIG. 5, the horizontal portion 204 moves to the position P2, and the manual handle 40 and the handle cover 11 are spaced apart from each other with a distance D. Once the initial separation, the mode switching stopper 220 as shown in Figure 8b and 9 is placed in the axial direction from the dotted line to the solid line state. This is the primary wheel wheel 90 and clutch holder 200 (movable clutch) due to the mode change stopper 220, which was being forced to the longitudinal direction by the torsion spring 150, pulls the manual handle 40 toward the user. The mode change stopper 220 stands in the axial direction of the secondary worm 81 and is fixed in the manual mode state by taking the space created by the separation of the space (100). That is, the initial movement occurs by pulling the manual handle 40 forward, but the generated separation distance D is parallel to the axial direction of the secondary worm 81 by the force of the torsion spring 150 of the mode switching stopper 220. At the same time, the groove 223 is placed in the teeth of the primary wwheel 90 to achieve a fixed state. In addition, the clutch holder 200 is divided into upper and lower holders 202 and 203, and the mode switching stopper 220 is installed in each of the holders 202 and 203, respectively, so that the force balance can be stably maintained in both rooms. When the handle shaft 60 is rotated by rotating the manual handle 40 in this state, the fixing clutch 50 coupled to the fixing pin 170 rotates together. The front end of the fixed clutch 50 has a biting protrusion 51 at regular intervals, so that the protrusions 51 and 102 of the movable clutch 100 having the protrusions 102 at the corresponding positions are engaged with each other and the movable clutch 100 is engaged. Rotate). Then, the inner diameter portion of the movable clutch 100 is coupled to the shaft portion 80 and the splines 82 and 101 of the secondary worm 81, so that the secondary worm 81 rotates and the secondary worm 81 and The valve is manually opened and closed through the engaged secondary worm wheel 70.

When the motor rotates by applying power in the manual mode, the primary worm wheel 90 is rotated through the primary worm 31 coupled to the shaft of the motor 20. Mode switching stopper 220 abutting on the tooth surface of the primary worm wheel 90 is the mode switching stopper 220 coupled to the bushing installed on the bolt (210) outer circumference is rotatable Therefore, a detailed illustration of the rotation means is omitted). For example, the rotation means rotates in a dotted line state in the solid line state of FIG. 9. The coil spring 130 pushes the gap of the force generated while rotating, from the state of FIG. 7 to the state of FIG. 7, from the state of FIG. 5 to the state of FIG. 4, and from the state of FIG. 8b to the state of FIG. 8a, the mode switching stopper 220. And the clutch holder 200 move close to the primary worm wheel 90 at the same time. In this case, the protrusions 51 and 102 are separated, and the protrusions 103 and 91 are engaged with each other from the state of FIG. 5 to the state of FIG. 4 (the state of FIG. 7 to the state of FIG. 6, the state of FIG. 8B to FIG. 8A). The valve transmits the rotational force of the primary worm wheel 90, which receives the power of the primary worm 31, to the secondary worm 81 and the secondary worm wheel 70 to operate the valve. In this case, the rotational force of the primary worm wheel 90 is transmitted to the movable clutch 100 engaged with the protrusions 91 and 103 by the spline 82, but the protrusions of the movable clutch 100 and the fixed clutch 50 are fixed to the movable clutch 100. 51 and 102 are separated from each other to block power from being transmitted to the handle shaft 60. Of course, for this purpose, the guide groove jaw 207 of the clutch holder 200 is placed in the guide groove 104 of the movable clutch 100, and the bending clutch 208 is placed in the fixed clutch 50 so as to move simultaneously in the axial direction. When pulling the handle 40 to enable the clutch action.

As described above, the present invention is a device for switching the mode of the actuator for opening and closing the valve of the electric and manual mode, by operating in a pull method rather than a lever type, simple configuration, convenient operation, pull the movable clutch through the clutch holder Even when operating in the manual mode, once pulled, the horizontal part of the clutch holder is pulled into the horizontal groove of the handle cover, so the clutch holder remains horizontal even if the manual handle is turned. As it is combined, it transmits the power of the handle shaft to the secondary worm shaft and functions to operate stably in the manual mode. Of course, the space in which the movable clutch moves to the handle side is operated in the manual mode by maintaining the distance between the primary worm wheel and the mode change stopper coinciding with the axial direction of the secondary worm wheel.

In addition, the present invention is to keep the inclined surface at one end of the mode change stopper and the groove portion at the end of the inclined surface to maintain the separation from the primary worm wheel in the manual mode, the end groove of the stopper in the electric mode to rotate along the gear of the primary worm wheel While falling naturally, the movable clutch is separated from the fixed clutch by the force of the coil spring, and moves along the spline and is engaged with the primary worm wheel to automatically become an electric mode.

In addition, the protrusion side of the primary wheel constitutes a curved groove, and the corresponding movable clutch has a curved shape, which enables precise engagement between the two coaxial axes, thereby facilitating the coupling and preventing its malfunction during operation. .

In addition, the clutch holder is divided into the upper and lower holders, and the clutch stopper is installed in each holder to perform the stopper in a balanced manner in the upper and lower positions so as to accurately maintain the mode state in the automatic and manual modes.

In addition, since there is no exposure of the lever to operate in the manual mode, there is no fear of malfunction or damage due to external impact, and the number of assembly parts is reduced, which is very effective in reducing labor and cost.

1 is a horizontal cross-sectional view showing a mode switching device by a conventional lever,

Figure 2 is a vertical cross-sectional view showing a portion of the worm and worm wheel of FIG.

3 is a vertical cross-sectional view showing the movable clutch and yoke shown in FIG.

4 is a horizontal sectional view in the electric mode of the present invention;

5 is a horizontal sectional view in the manual mode of FIG. 4;

6 is a horizontal sectional view in the electric mode of FIG. 4;

7 is a horizontal sectional view of FIG. 6;

8A is a perspective view showing a state in the transmission mode of the present invention with the body omitted;

8B is a perspective view showing the state in the manual mode of the present invention with the body omitted;

9 is a plan view of main parts of the manual mode of the present invention;

10 is an exploded perspective view showing an example of the clutch holder of the present invention.

Explanation of symbols for main parts of the drawings

     10: Buddy, 11: Handle Cover, 12: Handle Cover Horizontal Groove, 20: Motor, 30: 1 Primary Worm Shaft, 31: 1 Primary Worm, 40: Manual Handle, 50: Fixed Clutch, 51: Projection, 60: Handle shaft, 70: 2nd worm wheel, 80: 2nd worm shaft, 81: 2nd worm, 82: spline, 90: 1st worm wheel, 91: clutch clutch, 100: movable clutch, 101: spline, 102,103 : Protrusion, 104: guide groove, 130: coil spring, 150: torsion spring, 160, 170: fixing pin, 200; clutch holder, 201; vertical bar, 202; clutch upper holder, 203; clutch lower holder, 204; clutch holder horizontal Section 210; bolt, 211; bolt head, 212; screw section 220; mode switching stopper 221; vertical bending section 222; sloped surface 223; groove section

Claims (4)

The primary worm shaft 30 which is installed inside the buddy 10 of the actuator and is directly connected to the motor 20 as a driving source and rotates by receiving power from the motor, and is supported horizontally by the buddy 10 and is externally held by the manual handle. A handle worm 60 connected with the handle 40 and having a fixed clutch 50 at the end thereof, and a secondary worm installed coaxially with the handle shaft 60 to rotate the secondary worm wheel 70. The secondary worm shaft 80 having the 81 and the secondary worm shaft 80 is laid so that idling is possible to rotate in place by the motor 20 by being bitten with the primary worm 31. A movable clutch 100 axially movable on the primary worm wheel 90 and the secondary worm shaft 80 between the primary worm wheel 90 and the fixed clutch 50, and the buddy 10 Installed in the switching lever 110 so as to be rotatable in In the mode switching apparatus for opening and closing the valve actuator consisting of a yoke 120 for coupling selectively with the clutch 50 and the primary worm wheel (90), Remove the yoke 120 and the switching lever 110, Secondary worm along the horizontal groove 12 of the handle cover 11 coupled to the buddy 10 when the movable clutch 100 and the fixed clutch 50 are wrapped up and down in the outer periphery and pulled out to the handle in manual mode. Clutch holder 200 to move in the axial direction of the; A bolt 210 coupled to the clutch holder 200 to guide the bolt head 211 to the guide groove 104 of the movable clutch 100; The mode switch stopper which is coupled to rotate the screw portion 212 of the bolt 210 to the shaft to be settled in the direction of the secondary worm shaft to block power transmission of the primary worm wheel 90 and the movable clutch 100 in the manual mode ( 220); And Torsion is settled on the threaded portion of the bolt 210 and the stopper 220 is placed in the axial direction of the secondary worm 81 in the manual mode to provide an elastic force to space the primary worm wheel 90 and the movable clutch 100 Mode switching device of the electric actuator for opening and closing the valve, characterized in that it comprises a spring (150). According to claim 1, wherein the outer periphery of the clutch holder 200, the vertical bar 201 is outwardly bent, the vertical bar 201 is twisted together with the vertical bending portion 221 vertically bent one end of the stopper 220 A mode switching device for a valve opening and closing electric actuator, characterized in that configured to support both ends of the spring (150). 2. The gear of the primary worm wheel 90 according to claim 1, wherein the tip of the mode change stopper 220 forms an upward inclined surface 222, and the tip of the inclined surface 222 is settled in the axial direction of the secondary worm 81. Mode switching apparatus for a valve opening and closing electric actuator, characterized in that the groove 223 is formed to be placed in the. According to claim 1, the clutch holder 200 is the upper holder 202 and the lower holder 203 is coupled up and down, each holder 202, 203 forms a horizontal portion 204 extending horizontally from the side of the rear side, horizontal The unit 204 is configured to move only in the axial direction of the handle shaft 60 along the horizontal groove 12 of the handle cover 11 to maintain the horizontal position. Device.