KR101198877B1 - Power transmission apparatus for load break switch - Google Patents

Abstract

PURPOSE: A power transmitting device for a load breaker switch is provided to reduce the weight thereof by simplifying the operation and connection relations of a power transmitting device. CONSTITUTION: A motor driving unit(100) is composed of a worm(130) and a worm wheel(140) which transmit the rotation of a reduction ratio between a motor shaft(120) and a driving shaft. A driving shaft operating unit(200) selectively transmits the driving power of the motor driving unit to the driving shaft. A spring operating unit includes an elastic member which connects the driving shaft to a driven shaft and an elastic member which is connected to a fixing unit. An open operating unit(400) selectively restricts or releases the driving shaft. An input operating unit selectively restricts or releases the driven shaft. An input power transmitting unit(600) transmits the power of the motor driving unit to the input operating unit.

Description

Power transmission device for load switch {POWER TRANSMISSION APPARATUS FOR LOAD BREAK SWITCH}

The present invention relates to a load switch, and more particularly, to a power transmission device for a load switch that imparts a driving force to the breaker is selectively connected or short-circuited by the elastic restoring force of the springs being compressed and tensioned.

In general, the load switch is installed on a high-voltage electricity distribution line to quickly cut off the electricity supplied to a specific area in the event of an accident due to the load, thereby reducing the damage caused by the load to facilitate the renovation work. Device.

The load switch includes a breaker between the overcurrent detection unit and the power supply unit, connected to the overcurrent detection unit via a hinge, and receiving a driving force of a power transmission means provided at one side to selectively connect or short-circuit the fixed contact of the power supply unit. do.

As shown in FIG. 1, the power transmission device of the load switch includes a driving shaft 6 driven by a transmission means for selectively transmitting one-way driving force of the driving means, and the driving shaft 6 and the driven shaft 7. A connecting rod 8 having both ends linked together, a tension spring 6b having one end fixed to the base frame 5 and the other end fixed to the link portion 6a of the drive shaft 6, and the connecting rod 8 ) And a compression spring (7b) that is external to the drive shaft (6) is pressed by the link portion (7a) of the drive shaft (6) and the driven shaft (7).

The power transmission device of the conventional load switchgear configured as described above has a problem in that the connection relationship and the operation relationship for the technical configuration are complicated.

In particular, the connecting rod 8 guided by the link portion 7a of the driven shaft 7 has a through-hole long hole 8a formed in the longitudinal direction thereof. There is a difficulty in processing, there is a problem that takes a lot of manufacturing costs.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention, by simplifying the connection and the operating relationship of the power transmission means as a whole to reduce the weight, it is possible to improve the cost reduction It is to provide a power transmission device for a load switch.

In order to achieve the above object, the power transmission device for a load switch according to the present invention has at least three arrangements corresponding to three phases of AC, and is fixed to the driven shaft by linkage between the drive shaft and the driven shaft. A power transmission device for a load switchgear which transmits power to selectively disconnect or disconnect the cut-off device, the power transmission device comprising: a motor drive unit including a worm and a worm wheel that receive power from a driving motor and transmit rotation of a reduction ratio between the motor shaft and the drive shaft; A drive shaft operating unit surrounding the drive shaft and selectively transmitting a driving force to the drive shaft; An elastic member connecting the drive shaft and the driven shaft, and an elastic member connected to a fixing part positioned opposite to the driven shaft with respect to the drive shaft and the drive shaft, wherein the elastic members rotate the drive shaft. A spring actuating portion configured to tension at the same time as it starts to make; An open operation part for selectively restraining or releasing the drive shaft; An injection operation unit for selectively restraining or releasing the driven shaft; And an input power transmission unit configured to transmit power of the motor driving unit to the input operation unit.

It is characterized in that it further comprises an open power transmission unit configured to release the restraining of the open operation unit so that the blocking device is shorted from the power supply unit.

The drive shafts are separated from each other such that relative rotation is made with respect to the worm wheel.

The drive shaft operation unit includes a drive piece adjacent to the worm wheel, integrally circumscribed to the drive shaft, and having a concave cam surface formed on a portion of an outer circumferential surface thereof; A driving lever spaced apart from a center of the driving shaft by a shaft and fixed to one side of the worm wheel, and inserted into a cam surface of the driving piece to transmit a driving force of the worm wheel to the driving piece; And a stopper for disengaging the driving lever from the cam surface so that the worm wheel is rotated separately from the driving piece.

One end of the drive lever is characterized in that the roller is inserted into the cam surface and rolling motion along the outer peripheral surface of the drive piece.

The driving lever is characterized in that the elastic member is installed so that the roller is pressed in a state inclined in the cam surface direction.

The spring operation unit, each drive link arm and the driven link arm is fixed to the drive shaft and the driven shaft externally; And a first spring connected to one side of the driving link arm and the driven link arm corresponding to each other, and a second spring connected to the other side of the driving link arm and a fixing part of the base frame.

The spring operation unit includes a link link formed with a long hole connected to the other side of the drive link arm and the driven link arm, one side of the link is fixed to the drive link arm, the other side is driven link arm It is characterized in that it is connected to be guided into the long hole.

The open operation part may include an open latch shaft having a recessed groove surface inclined downward on a portion of an outer circumferential surface thereof; And an open latch that selectively passes through the groove surface of the open latch shaft or is locked to an outer circumferential surface of the open latch shaft, and is formed integrally with a drive piece of the drive shaft operating portion.

The open latch shaft is characterized in that the elastic member for imparting an elastic force so as to maintain the initial state elastically.

The input operation unit, the input latch shaft which is formed in the recessed groove surface is inclined downward in a portion of the outer peripheral surface, the driving force of the input power transmission unit; And an input latch selectively passing through the groove surface of the input latch shaft, or locked to an outer circumferential surface of the input latch shaft, and formed integrally with the driven shaft.

The insertion latch shaft is characterized in that the elastic member for imparting an elastic force so as to maintain the initial state elastically.

The input power transmission unit, the drive cam is fixed to the other side of the worm wheel, the drive cam having a pivot portion protruding in the radial direction; An operating piece positioned on the rotational track of the pivot part and axially fixed, and having one end hitting the pivot part to rotate; And a connecting piece which is axially fixed to the closing latch shaft of the closing operation part and rotates by hitting one end against the other end of the operating piece.

The open power transmission unit, the connecting rod which is vertically installed below the open latch shaft to release the restriction of the opening operation; And a solenoid installed in an orthogonal direction with respect to the connecting rod and electrically operated.

The open power transmission unit, the connecting rod which is vertically installed below the open latch shaft to release the restriction of the opening operation; And a manual lever connected to the connecting rod and operating manually.

According to the power transmission device for a load switchgear according to the present invention having the above-described configuration, the number of parts is reduced compared to the prior art, and the overall weight reduction can be achieved, and the cost reduction can be further improved.

In addition, there is an effect that can simplify the connection relationship and the operation relationship of the power transmission means.

1 is a perspective view showing a power transmission device for a conventional load switch.
2 is a plan view showing the overall configuration of a power transmission device for a load switch according to the present invention.
Figure 3 is a side view showing a power transmission device for a load switch according to the invention.
4 is a plan view showing a detailed configuration of a power transmission device for a load switch according to the present invention.
5a to 5f is an operation diagram showing an operating state of the power transmission device for a load switch according to the present invention.
6a and 6b is an operation diagram showing an operating state of the spring operating unit according to the present invention.

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

Figure 2 is a plan view showing the overall configuration of the power transmission device for a load switch according to the invention, Figure 3 is a side view showing a power transmission device for a load switch according to the invention, Figure 4 is a power for the load switch according to the invention It is a top view which shows the detailed structure of a delivery apparatus.

As shown in FIGS. 2 to 4, the load switch according to the present invention is connected to the overcurrent detection unit 1 through a hinge between the overcurrent detection unit 1 and the power supply unit 2 to fix the power supply unit 2. It includes a shut-off device 3 including a movable contact provided to be selectively connected to or short-circuited at the contact.

In particular, the blocking device 3 has at least three arrangements arranged in a row on the base frame 5 forming an appearance corresponding to the three-phase alternating current.

The cut-off device 3 has a link-type opening and closing structure, and is configured to open and close a line between the movable contact and the fixed contact by receiving the driving force of the power transmission device 10.

In a preferred embodiment of the present invention, it is operated by the control signal of the controller 4 received the detection signal such as overcurrent, the main point of the configuration of the power transmission device 10 for transmitting power to the interruption device (3) This will be described.

Specifically, the power transmission device 10, the drive motor 110 and the motor shaft 120, and the rotation of the reduction ratio between two axes (motor shaft 120 and the drive shaft 6) that does not cross at right angles to each other. It includes a motor drive unit 100 made of a worm gear having a worm 130 and a worm wheel 140 used to transmit. At this time, it is preferable that a bearing (not shown) is installed at one side for smooth rotation of the motor shaft 120.

In addition, the driving shaft 6 is inserted into the center of the worm wheel 140 to be orthogonal to the worm 130 is installed. At this time, the drive shaft (6) is separated from each other so that relative rotation is made with respect to the worm wheel (140).

A drive shaft operating part 200 for selectively transmitting the driving force of the worm wheel 140 to the drive shaft 6 is provided on the drive shaft 6.

The drive shaft operating unit 200 is adjacent to the worm wheel 140, and integrally circumscribed to the drive shaft 6, and has a ring-shaped drive piece 210 having a concave cam surface 211 formed on a part of its outer circumferential surface. It will be included.

In addition, the drive shaft operation unit 200 is axially fixed to one side of the worm wheel 140 by a predetermined distance from the center of the drive shaft 6, the cloud movement along the outer peripheral surface of the drive piece 210 The roller 221 inserted into the cam surface 211 and transmitting the driving force of the worm wheel 140 to the driving piece 210 includes a driving lever 220 provided at one end.

Here, the driving lever 220 is provided with an elastic member (not shown) so that the roller 221 is pressed to the cam surface 211 in a state inclined toward the cam surface 211.

In addition, the base frame 5 adjacent to the other end of the driving lever 220 protrudes in the direction of the driving lever 220, so that the worm wheel 140 is detached from the cam surface 211. The stopper 230 is installed to be rotated separately from the driving piece 210.

Accordingly, the driving shaft 6 is rotated in one direction (clockwise) while the driving lever 220 and the driving piece 210 are coupled to each other while being rotated together by the rotation of the worm wheel 140. When the driving lever 220 is separated from the driving piece 210 by the stopper 230, the rotation is stopped.

On the other hand, the drive motor 110 has an electric circuit (not shown) by a limit switch (not shown) connected to the driven shaft 7 in line when the shutoff device 3 is connected by the driven shaft 7. It stops as it is turned off.

On the other hand, the drive shaft 6 is arranged side by side spaced apart at a predetermined interval, the driven shaft (7) is provided on the outer peripheral surface connected to the blocking device (3) via a link arm (3a).

The driven shaft 7 is in a state in which rotational drive is limited by the injection operation part 500 before the initial driving.

An elastic member connecting the drive shaft 6 and the driven shaft 7 and a fixing part 5a positioned opposite the driven shaft 7 around the drive shaft 6 and the drive shaft 6, respectively. It includes an elastic member and the elastic member is provided with a spring operating unit 300 is configured to tension at the same time when the drive shaft operating portion 200 starts to rotate the drive shaft (6).

The spring operating part 300 includes a driving link arm 310 and a driven link arm 320 which are fixed to the driving shaft 6 and the driven shaft 7.

In addition, the spring operation unit 300 includes an elastic member connected to the drive link arm 310 and the driven link arm 320.

In detail, the elastic member includes a plurality of first springs 330 connected to one side of the driving link arm 310 and the driven link arm 320, and the other side and the base of the driving link arm 310. The fixing part 5a of the frame 5 includes a plurality of second springs 340 connected thereto.

In addition, the spring linking part 300 includes a connection link 350 having a long hole connected to the other side of the driving link arm 310 and the driven link arm 320. In particular, one side of the connection link 350 is fixed to the drive link arm 310, the other side is connected so that the driven link arm 320 is inserted into the long hole and guided.

The spring actuating part 300 configured as described above is the first connected to the driven link arm 320 of the driven shaft 7 in the restrained state while the driving shaft operating part 200 is operated to rotate the driving shaft 6. The spring 330 and the second spring 340 connected to the fixing part 5a are tensioned stepwise in proportion to the amount of rotation.

On the other hand, the open operation unit 400 is arranged side by side between the drive shaft 6 and the driven shaft (7) to selectively restrain or release the drive shaft (6) in the state in which the first and second springs (330, 340) are tensioned ) Is installed.

The opening operation unit 400 has a function to short-circuit the cutoff device 3 from the power supply unit 2 when released. In the configuration of the opening operation unit 400, a groove surface 411 concave to a part of the outer circumferential surface thereof is formed. It includes an open latch shaft 410 is formed to be inclined downward.

Here, the open latch shaft 410 is configured to intervene an elastic member (not shown) for imparting an elastic force in a clockwise or counterclockwise direction to elastically maintain the initial state.

In addition, the open operation unit 400 may include an open latch 420 formed integrally with the drive piece 210 of the drive shaft operation unit 200.

At this time, the driving piece 210 is integrated with the first driving piece 210a having a concave cam surface 211 formed on a part of the outer circumferential surface, and the opening latch 420 integrally with the first driving piece 210a. The second driving piece 210b is formed to be divided into pieces.

The open latch 420 may selectively pass through the groove surface 411 of the open latch shaft 410 or may be locked to an outer circumferential surface of the open latch shaft 410.

Specifically, referring to the interaction between the open latch 420 and the open latch shaft 410, the open latch 420 may be separated from the cam surface 211 of the driving piece 210 by the driving lever 220. It rotates together with the worm wheel 140 until the driving lever 220 hits the groove surface 411 of the open latch shaft 410 just before the drive lever 220 is separated from the cam surface 211 of the driving piece 210. It rotates 410 and passes through the groove surface 411.

Thereafter, the open latch shaft 410 is returned to its original state by the elastic restoring force of the elastic member, and then the driving lever 220 is separated from the cam surface 211 of the driving piece 210 so that the driving shaft 6 After the restraint is released, the open latch 420 is constrained to the outer circumferential surface of the open latch shaft 410 by the elastic restoring force of the first and second springs 330 and 340 of the spring operating part 300.

Eventually, the drive shaft 6 is constrained by the interaction between the open latch shaft 410 and the open latch 420, which is the open operation unit 400.

In addition, in a preferred embodiment according to the present invention, it is to include an open power transmission unit 600 for releasing the restraint of the open latch shaft 410 so that the blocking device 3 is short-circuited from the power supply (2).

The open power transmission unit 600 includes a connecting rod 611 vertically installed below the open latch shaft 410 and a solenoid 610 installed in a direction orthogonal to the connecting rod 611. .

Here, the solenoid 610 releases the restraint of the open latch shaft 410, and the drive shaft 6 and the driven shaft 7 rotate together by the elastic restoring force of the spring actuating portion 300, the blocking device (3) A rod 612 is configured to operate in a direction (open solenoid direction) to open.

The solenoid 610 is configured to be electrically operated by a user through a separate power switch, but the present invention is not limited thereto, and the solenoid 610 may be manually operated by connecting the manual lever 620 to the connecting rod 611.

In addition, in the preferred embodiment according to the present invention, the injection operation unit 500 is arranged side by side between the driven shaft 7 and the open operating unit 400 to selectively restrain or release the rotation of the driven shaft (7) ) Is installed.

The closing operation unit 500 has a function of connecting the blocking device 3 to the power supply unit 2 when released, the closing operation unit 500 is formed with a recessed groove surface 511 is inclined downward on a portion of the outer peripheral surface, It includes an input latch shaft 510 receiving the driving force of the input power transmission unit 700 to be described later.

Here, the closing latch shaft 510, like the open latch shaft 410 is interposed with an elastic member (not shown) for imparting an elastic force in the clockwise or counterclockwise direction is configured to elastically maintain the initial state .

In addition, the closing operation unit 500 will include a closing latch 520 formed integrally with the driven shaft (7).

Like the open latch 420, the closing latch 520 is selectively configured to pass through the groove surface 511 of the closing latch shaft 510 or to be locked to an outer circumferential surface of the closing latch shaft 510.

In addition, in a preferred embodiment according to the present invention, the driving power transmission unit for transmitting the driving force of the motor driving unit 100 to the input operation unit 500 so that the cut-off device 3 is connected to the power supply unit ( 700) is installed.

The input power transmission unit 700 is axially fixed to the other side of the worm wheel 140, and includes a drive cam 710 having a pivot portion 711 protruding in the radial direction on the outer peripheral surface.

In addition, the driving cam 710 is located on the rotational track of the pivoting portion 711 of the axis and fixed to the pivoting portion 711 one end hits and rotates, the input latch shaft ( It is coupled to the shaft 510 is interlocked with one end to the other end of the operating piece 720 includes a connecting piece 730 to rotate.

In this case, the operating piece 720 may be deleted, and the driving cam 710 may be configured to directly hit the connecting piece 730, but the driving shaft 6 and the feeding latch shaft 510 are identical to each other. Preferably, the operating piece 720 is interposed between the driving cam 710 and the connecting piece 730 to rotate in a clockwise direction.

The input power transmission unit 700 configured as described above implements the rotation operation of the input latch 520 integrally fixed to the driven shaft 7.

That is, when the driving lever 220 installed on one side of the worm wheel 140 is separated from the cam surface 211 of the driving piece 210, and then the driving shaft 6 is restrained by the opening operation part 400. The drive cam 710 is further rotated for a predetermined period of time by the motor drive unit 100, wherein the pivot portion 711 of the drive cam 710 is fixed to the other side of the worm wheel 140 step by step By transmitting the rotational power to the operating piece 720 and the connecting piece 730 to rotate the closing latch shaft 510.

Subsequently, when the closing latch shaft 510 is rotated, the closing latch 520 in a state constrained by the closing latch shaft 510 passes through the groove surface 511 formed in the closing latch shaft 510. Since it is released, the restraint of the driven shaft 7 is also released.

Accordingly, since the first spring 330 of the spring actuating part 300 fixed to the driven link arm 320 of the driven shaft 7 is elastically restored, the driven shaft 7 is rotated. Eventually, a blocking device 3 externally fixed to the driven shaft 7 via the link arm 3a is introduced into the fixed contact point.

Hereinafter, the operation of the power transmission device for a load switch according to the present invention configured as described above are as follows.

5A to 5F are operation diagrams showing an operating state of a power transmission device for a load switch according to the present invention, and FIGS. 6A and 6B are operation diagrams showing an operating state of a spring operating unit according to the present invention.

1. Operation for connection of breakers

First, as shown in FIG. 5A, the closing latch 520 of the closing operation part 500 fixed to the driven shaft 7 is in a state constrained to the closing latch shaft 510, and the open latch shaft 410 is closed. With the groove surface 411 of the inclined downward,

When the driving motor 110 is driven, as shown in FIG. 5B, the worm 130 fixed on the motor shaft 120 rotates, and the worm wheel 140 engaged with the worm 130 is driven. The cam 710 is rotated in one direction (clockwise).

When the worm wheel 140 rotates in one direction, the driving lever 220 fixed to one side of the worm wheel 140 rotates in the same rotational direction as that of the worm wheel 140 along the outer circumferential surface of the driving piece 210. The roller 221 of the driving lever 220 is inserted into the concave cam surface 211 of the driving piece 210 so that the driving piece 210 and the worm wheel 140 rotate together.

That is, the worm wheel from the time when the drive piece 210 and the worm wheel 140 are rotated together until the stopper 230 and the drive lever 220 is in contact with the roller 221 is separated from the cam surface 211 When the 140 continuously rotates, the drive shaft 6 on which the drive piece 210 is fixed rotates in the same direction as the worm wheel 140.

Subsequently, as shown in FIG. 5C, at the same time as the driving lever 220 is separated by the stopper 230, the open latch shaft 420 integrally fixed to the driving piece 210 is opened. The open latch shaft 410 rotates while passing through the groove surface 411 while colliding with the groove surface 411 formed in the 410.

The open latch shaft 410 is returned to its original state by the elastic restoring force of the elastic member, the opening latch 420 passed through the groove surface 411 is as shown in Figure 5d, of the spring operating portion 300 It is reversely rotated by an elastic restoring force and restrained by an outer circumferential surface of the open latch shaft 410.

In this state, when the drive motor 110 continues to operate and the worm wheel 140 rotates, the pivot portion 711 of the drive cam 710 is fixed to the operating piece 720 and the closing latch shaft 510. When the connecting piece 730 is continuously operated, the restraint of the driven shaft 7 is released while the restraint latch 520 in the state restrained by the restraint latch shaft 510 is released.

Accordingly, as shown in FIG. 6A, the first spring 330 of the spring actuating part 300 fixed to the driven link arm 320 of the driven shaft 7 is elastically restored while the driven shaft is elastically restored. Since 7 is rotated in one direction (clockwise), the interrupting device 3 fixed to the driven shaft 7 is connected (injected).

When the disconnecting device 3 is connected by the driven shaft 7, the limit switch connected to the driven shaft 7 is operated to turn off the electric circuit (not shown), thereby stopping the driving motor 110. do.

2. Operation for short circuit of breaker

First, when the user operates a separate power switch to open the blocking device 3, as illustrated in FIG. 5E, the rod 612 is connected to the connecting rod 611 connected to the lower side of the open latch shaft 410. ) Is connected to the solenoid 610 is operated.

When the rod 612 of the solenoid 610 is operated in the direction of opening the blocking device 3, the open latch shaft 410 is rotated, as shown in Figure 5f, the open latch shaft 410 The open latch 420, which is constrained to the side surface of the open latch shaft 410, passes through the groove surface 411 of the open latch shaft 410.

As such, when the restraint of the open latch 420 is released, the restraint of the driving shaft 6 is released.

Accordingly, as shown in FIG. 6B, the second spring 340 of the spring operating part 300, which is fixed in the tensioned state to the drive link arm 310 of the drive shaft 6, is elastically restored, thereby driving the drive shaft 6. ) Rotates in one direction (counterclockwise direction), so that the link link arm connected to the driving link arm 310 moves together with the second spring 340 and pulls the driven link arm 320.

When the driven link arm 320 is pulled toward the driving shaft 6, the driven link arm 320 is rotated in one direction (counterclockwise), so that the blocking device 3 is fixed to the driven shaft 7. Is shorted (opened).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications to the embodiments are also within the scope of the claims of the present invention.

100: motor drive unit 110: drive motor
120: motor shaft 130: worm
140: worm wheel 200: drive shaft operating portion
210: driving piece 211: cam surface
220: driving lever 221: roller
230: stopper 300: spring operating portion
310: driving link arm 320: driven link arm
330: first spring 340: second spring
350: connection link 400: open operation
410: open latch shaft 411: groove surface
420: release latch 500: closing operation
510: latching shaft 511: groove surface
520: closing latch 600: open power transmission unit
610: solenoid 611: connecting rod
612: rod 620: manual lever
700: input power transmission unit 710: drive cam
711: pivot portion 720: working piece
730 connection

Claims (10)

A power transmission device for a load switchgear having at least three arrangement configurations corresponding to the three-phase alternating current, which transfers power to selectively connect or short-circuit a disconnect device fixed to the driven shaft through the interaction between the drive shaft and the driven shaft. In
A motor driving unit including a worm and a worm wheel which receive the power of the driving motor and transmit the rotation of the reduction ratio between the motor shaft and the driving shaft;
A drive shaft operating unit surrounding the drive shaft and selectively transmitting a driving force to the drive shaft;
An elastic member connecting the drive shaft and the driven shaft, and an elastic member connected to a fixed portion positioned opposite to the driven shaft with respect to the drive shaft and the drive shaft, wherein the elastic members rotate the drive shaft. A spring actuating portion configured to tension at the same time as it starts to make;
An open operation part for selectively restraining or releasing the drive shaft;
An injection operation unit for selectively restraining or releasing the driven shaft; And,
And a closing power transmission unit for transmitting the power of the motor driving unit to the closing operation unit.
The method of claim 1,
The power transmission device for a load switch, characterized in that it further comprises an open power transmission unit configured to release the restraining of the open operation unit is a short circuit from the power supply.
The method of claim 1,
The drive shaft is a power transmission device for a load switch, characterized in that separated from each other to make a relative rotation with respect to the worm wheel.
The method of claim 1,
The drive shaft operation unit,
A drive piece adjacent to the worm wheel, integrally circumscribed with the drive shaft, and having a concave cam surface formed on a portion of an outer circumferential surface thereof;
A driving lever spaced apart from a center of the driving shaft by a shaft and fixed to one side of the worm wheel, and inserted into a cam surface of the driving piece to transmit a driving force of the worm wheel to the driving piece; And,
And a stopper for disengaging the drive lever from the cam surface so that the worm wheel is rotated separately from the drive piece.
The method of claim 1,
The spring operation portion,
Respective drive link arms and driven link arms externally fixed to the drive shaft and the driven shaft; And,
A first spring connected to one side of the driving link arm and the driven link arm corresponding to each other, and a second spring connected to the other side of the driving link arm and a fixing part of the base frame; Power train.
The method of claim 1,
The opening operation portion,
An open latch shaft in which a recessed groove surface is formed to be inclined downward on a portion of the outer circumferential surface; And,
And an open latch selectively passing through a groove surface of the open latch shaft, or locked to an outer circumferential surface of the open latch shaft, and formed integrally with a drive piece of the drive shaft operating portion.
The method of claim 1,
The injection operation unit,
An input latch shaft having a concave groove surface inclined downward on a portion of an outer circumferential surface thereof and receiving a driving force of the input power transmission unit; And,
And a feed latch selectively passing through a groove surface of the feed latch shaft or locked to an outer circumferential surface of the feed latch shaft, the feed latch being integrally formed on the driven shaft.
The method of claim 1,
The input power transmission unit,
A drive cam axially fixed to the other side of the worm wheel and having a pivot portion protruding in a radial direction on an outer circumferential surface thereof;
An operating piece positioned on the rotational track of the pivot part and axially fixed, and having one end hitting the pivot part to rotate; And,
A power transmission device for a load switch, characterized in that the shaft is fixed to the closing latch shaft of the closing operation unit and the connection piece is rotated by hitting one end to the other end of the operating piece.
The method of claim 2,
The open power transmission unit,
A connecting rod vertically installed under the open latch shaft to release the restraint of the open operation part; And,
Power transmission device for a load switch characterized in that it comprises a solenoid which is installed in an orthogonal direction to the connecting rod and electrically operated.
The method of claim 2,
The open power transmission unit,
A connecting rod vertically installed under the open latch shaft to release the restraint of the open operation part; And,
The power transmission device for a load switch characterized in that it comprises a manual lever connected to the connecting rod to operate manually.

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