KR102547151B1 - Driving Shaft Locking Device for Disconnector - Google Patents

Abstract

The present invention relates to a locking device for a drive shaft of a disconnector, and more particularly, to a locking device for restraining a drive shaft of a disconnector.
A device for locking a drive shaft of a disconnector according to an embodiment of the present invention includes a fixed contact connected to a circuit, a movable contact that contacts or separates from the fixed contact and energizes or blocks the circuit, a drive shaft that operates the movable contact, and a drive shaft that is connected to the movable contact. A drive shaft locking device of a disconnector comprising a drive shaft locking device that is coupled or separated to restrict or release rotation of the drive shaft, wherein the drive shaft locking device includes: a fixed support portion fixed to the disconnector; a movable locking unit that is slidably installed on the fixed support unit and coupled to or separated from the drive shaft while linearly moving along an action axis intersecting an axial direction of the drive shaft at a predetermined angle; an electromagnet unit fixed to the fixed support unit and providing electromagnetic force for moving the movable locking unit; and a transfer unit provided in the electromagnet unit and moving by the electromagnetic force of the electromagnet unit to act on the movable locking unit.

Description

Driving Shaft Locking Device for Disconnector}

The present invention relates to a locking device for a drive shaft of a disconnector, and more particularly, to a locking device for restraining a drive shaft of a disconnector.

In general, disconnectors are devices applied to power facilities such as switchboards, circuit breakers, and gas insulated switchgear.

As an example of such a power facility, a gas insulated switchgear is installed between the circuit between the power side and the load side of the electrical system when artificially opening and closing the circuit in a normal current state or when there is an abnormality such as a ground fault or short circuit on the circuit. It is an electrical device that protects the power system and load equipment by safely cutting off the current when current is generated.

These gas insulated switchgear (GIS) are usually a bushing unit that receives power from a high-voltage power source, a circuit breaker (CB), a disconnector switch (DS), an earth switch (ES), and a moving part Unit) and control unit.

Here, the disconnector (DS) is a device (module) for isolating a circuit or changing a connection after removing a load current (ie, in a no-load state) when inspecting a device.

The closing and opening of the disconnector are controlled by the driving force generated by the manipulator.

1 shows the configuration of a disconnector according to the prior art, and FIG. 2 shows a drive shaft locking device of the disconnector according to the prior art.

The disconnector has a fixed contact (1) connected to the circuit, a movable contact (2) contacted or separated from the fixed contact (1), a drive shaft (3) for rotating the movable contact (2), and a drive shaft (3) for rotating. It consists of a drive unit 4 that provides power.

1 shows the On operating state of the disconnector. When the On signal is input, the drive shaft (3) rotates clockwise or counterclockwise by the driving force of the drive unit (drive motor) 4, and the movable contactor (2) rotates through the link (5) connected to the drive shaft (3). By contacting the fixed contactor 1, the circuit is connected.

In order to restrain the operation of the disconnector, specifically, a drive shaft locking device is provided to restrain the drive shaft 3 of the disconnector. The drive shaft locking device includes a coil 7 and a locking pin 6.

A locking pin 6 connected to the driving shaft 3 constrains or releases rotation of the driving shaft 3 . When the driving shaft 3 is in the On position or Off position, the locking pin 6 is inserted into the locking hole 3a of the driving shaft 3 to restrict the rotation of the driving shaft 3.

When current flows through the coil 7 and electromagnetic force acts on the locking pin 6, it is attracted toward the coil 7 and escapes from the locking hole 3a. Accordingly, the locking pin 6 releases the restraint on the drive shaft 3 and the user can operate the disconnector by operating the drive unit 4.

By the way, the drive shaft locking device of the disconnector according to the prior art is a method in which the coil 7 and the locking pin 6 are directly connected, so if the driving unit 4 is operated in a locked state, the locking pin 6 and the coil (7) may result in deformation or damage to all of them.

The present invention has been made to solve the above problems, and its object is to provide a drive shaft locking device of a disconnector to prevent deformation or breakage of the drive shaft locking device due to rotation of the drive shaft in the inserted state.

A device for locking a drive shaft of a disconnector according to an embodiment of the present invention includes a fixed contact connected to a circuit, a movable contact that contacts or separates from the fixed contact and energizes or blocks the circuit, a drive shaft that operates the movable contact, and a drive shaft that is connected to the movable contact. A drive shaft locking device of a disconnector comprising a drive shaft locking device that is coupled or separated to restrict or release rotation of the drive shaft, wherein the drive shaft locking device includes: a fixed support portion fixed to the disconnector; a movable locking unit that is slidably installed on the fixed support unit and coupled to or separated from the drive shaft while linearly moving along an action axis intersecting an axial direction of the drive shaft at a predetermined angle; an electromagnet unit fixed to the fixed support unit and providing electromagnetic force for moving the movable locking unit; and a transfer unit provided in the electromagnet unit and moving by the electromagnetic force of the electromagnet unit to act on the movable locking unit.

Here, a plurality of locking holes into which the movable locking part can be inserted are formed in the driving shaft.

In addition, the fixed support portion is formed in a 'ㅁ'-shaped structure, and a portion thereof is cut to form an open structure having an open portion.

In addition, it is characterized in that the first guide portion protrudes along the direction of the action axis on the first side surface of the fixed support portion.

In addition, the second side of the fixing support portion is characterized in that the delivery support portion for inserting and supporting the delivery portion is formed with a groove or hole.

In addition, the movable locking part is characterized in that formed in a 'ㅁ'-shaped structure.

In addition, the movable locking part is inserted through the opening and is characterized in that a part of the fixing support part is alternately arranged.

In addition, a locking pin that can be inserted into the locking hole is protruded along the direction of the action axis on the first side of the movable locking part.

In addition, a first guide hole through which the first guide part can be supported is formed on the first side surface of the movable locking part.

In addition, it is characterized in that the second guide part protrudes along the direction of the action axis on the second side of the movable locking part.

In addition, a second guide hole through which the second guide part can be supported is formed on the second side surface of the fixing support part.

In addition, the electromagnet unit is characterized in that a bracket for fixing to the fixed support is provided.

In addition, the electromagnet unit is characterized in that it comprises a coil wound in a cylindrical shape, a fixed core and a movable core spaced apart from each other in the hollow of the coil.

In addition, one end of the fixed core is characterized in that the pin support portion for supporting the delivery unit protrudes in a tubular shape.

In addition, a restoring force unit for returning the movable locking unit to its original position is characterized in that it is further included.

In addition, the restoring force portion is characterized in that composed of a compression spring fitted to the first guide portion.

In addition, it is characterized in that the electromagnet portion is provided with a spring support for supporting one end of the restoring force portion.

And, the transmission part is characterized in that it is composed of a transmission pin protruding from one end of the movable core and slidingly moving through the pin support part.

According to the drive shaft locking device of the disconnector according to an embodiment of the present invention, since the coil unit and the locking unit are not integrally configured but are separated, the coil unit is not directly affected by the rotation of the driving shaft and is thus protected.

Since the locking pin inserted into the driving shaft is integrally formed with the movable locking unit and has excellent holding power, it is not easily deformed or damaged even when rotational force is applied to the driving shaft in the inserted state.

Since the movable locking part is installed on the fixed support part and receives support, it is not easily deformed or damaged even if it receives the force of the driving shaft.

Since the coil part is installed on the fixed support and separated from the locking pin by the transmission part, it does not directly receive the force of the drive shaft and is not deformed or damaged.

1 is a perspective view of a disconnector according to the prior art.
Figure 2 is a detailed view of the drive shaft locking mechanism in Figure 1;
3 is a perspective view of a disconnector according to an embodiment of the present invention.
4 is a perspective view of a drive shaft locking device applied to a disconnector according to an embodiment of the present invention.
5 is an exploded perspective view of the drive shaft locking device of FIG. 4 .
6 and 7 are operational views of an electromagnet unit applied to a drive shaft locking device of a disconnector according to an embodiment of the present invention. 6 shows an Off state, and FIG. 7 shows an On state.
8 and 9 are operational diagrams of a drive shaft locking device of a disconnector according to an embodiment of the present invention. 8 shows a state in which the drive shaft locking device restrains the drive shaft, and FIG. 9 shows a state in which the drive shaft locking device releases the restraint on the drive shaft.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to be described in detail so that those skilled in the art can easily practice the invention. It does not mean that the technical spirit and scope of the invention are limited.

Figure 3 is a perspective view of a disconnector according to an embodiment of the present invention, Figure 4 is a perspective view of a drive shaft locking device applied to the disconnector according to an embodiment of the present invention, Figure 5 is an exploded perspective view of the drive shaft locking device of FIG. A drive shaft locking device of a disconnector according to each embodiment of the present invention will be described in detail with reference to the drawings.

A device for locking a drive shaft of a disconnector according to an embodiment of the present invention includes a fixed contactor 20 connected to a circuit and a movable contactor 30 that is in contact with or separated from the fixed contactor 20 to conduct or block the circuit, the movable In a drive shaft locking device of a disconnector including a drive shaft 50 that operates a contactor 30 and a drive shaft lock device 100 that is coupled or separated to the drive shaft 50 to restrict or release rotation of the drive shaft 50 , The drive shaft locking device 100 includes a fixed support 110 fixed to the disconnector; It is slidably installed on the fixed support part 110 and coupled to or separated from the drive shaft 50 while linearly moving along an action shaft A intersecting at a predetermined angle with the axial direction B of the drive shaft 50 a movable locking unit 120; an electromagnet unit 130 providing electromagnetic force for moving the movable locking unit 120; It is characterized in that it includes; a transmission part 140 which moves by the electromagnetic force of the electromagnet part 130 and acts on the movable locking part 120.

The disconnector (DS) is a device for isolating a circuit or changing a connection after removing a load current (ie, in a no-load state) when inspecting a power device. Disconnectors are used in many power installations. For example, switchboards, circuit breakers, or gas insulated switchgear.

A switchboard is a device in which various power devices are gathered, and a switchboard is used for monitoring, control, and protection of a power system. In addition, the switchboard is a facility that receives power and supplies power required by load facilities installed in each power consumer, and is used for operation of power plants and substations. In addition, switchboards are used to operate mechanical devices such as electric motors (motors). Various power devices such as circuit breakers, switchgear, transformers, current transformers, lightning arresters, and various measurement equipment are provided inside the switchboard.

A circuit breaker is an electrical device that cuts off a circuit when an accident such as opening or closing a load or grounding or short circuit occurs in transmission, transformation, or an electric circuit. Among these circuit breakers, the air circuit breaker is a circuit breaker that uses air as an arc extinguishing medium and is mainly used for low voltage devices. Air circuit breakers are of a fixed type that is used by being fixed to a switchboard or other equipment, and a draw-out type that is used by installing and withdrawing the main body of the circuit breaker in a cradle. In the case of a draw-out type, it is widely used because it is advantageous for maintenance of the circuit breaker body.

On the other hand, the gas insulated switchgear (GIS) is a bushing unit that receives power from a normal high-voltage power source, a circuit breaker (CB), a disconnector switch (DS), an earth switch (ES), a moving part ( Moving Unit) and Control Unit.

3 shows a disconnector according to an embodiment. First, the configuration and operation of the disconnector will be described.

An enclosure 10 or a case 10 is provided. The enclosure 10 is provided to install and house the components of the disconnector. The enclosure 10 may be formed in a closed box shape or may be configured in an open shape as in the example shown in FIG. 3 .

As an example of an open form of the enclosure 10, the enclosure 10 may be composed of a combination of a plurality of panels (or plates). These panels may include a front plate 11, a bottom plate 12, and a back plate 13.

The lower plate 12 is provided with mounts 14 and 15 for fixing the fixed part and the movable part. Mounting tables 14 and 15 may each be composed of a block having irregularities.

The stationary contactor 20 is fixedly installed on the stator mount 15. The fixed contact 20 may be formed in the form of a plate or a bus bar. The fixed contact 20 is connected to one end of the circuit.

Although not separately shown, the fixed contact 20 may be composed of a plurality of plates.

The movable part 25 is fixedly installed on the mover mount 14. The movable part 25 may be formed in the form of a plate or a bus bar. The movable part 25 is installed to be spaced apart from the fixed contact 20 at a predetermined interval. The moving part 25 is connected to the other end of the circuit.

The movable contact 30 is rotatably installed at the end of the movable part 25 . The movable contact 30 may be formed in the form of a plate or a bus bar. The movable contact 30 may be disposed to cross the movable part 25 . That is, the plate of the movable contactor 30 and the plate of the movable part 25 are installed in a form in which a part is engaged with each other. Alternatively, the plate of the movable contactor 30 and the plate of the movable part 25 are installed in a form in which some of them are crossed with each other. The movable contact 30 is rotatably installed with respect to the rotation shaft 28 of the movable part 25 .

Although not separately shown, the movable part 25 and the movable contact 30 may be composed of a plurality of plates. At this time, each plate of the movable part 25 and each plate of the movable contactor 30 may be arranged in a form interlocking with each other or in a form crossing each other.

When the movable contactor 30 rotates and contacts the fixed contactor 20, the circuit is connected (energized), and when the movable contactor 30 rotates and is separated from the fixed contactor 20, the circuit is opened (blocked).

A drive unit 40 is provided. The driving unit provides a driving force to move the movable contactor 30. The driving unit 40 may include a driving motor. The driving motor operates by receiving a driving current. The drive unit 40 is operated by electrical or mechanical force to provide rotational force to the drive shaft 50 . The force of the driving unit 40 rotates the driving shaft 50, and the rotational force of the driving shaft 50 rotates the movable contactor 30 via the links 44 and 46.

The driving shaft 50 is connected to the driving unit 40 and the movable contact 30 (or link). The driving shaft 50 is rotated by the driving force of the driving unit 40, and this rotational force rotates the movable contactor 30 via the links 44 and 46. The driving shaft 50 may be installed across the front plate 11 and the rear plate 13 . The driving shaft 50 rotates forward or backward by the driving force of the driving unit 40 . Although not shown in detail, a reduction gear may be provided between the driving unit 40 and the driving shaft 50 .

Locking holes 52 and 54 are formed in the driving shaft 50 . The locking holes 52 and 54 are the first locking hole 52 into which the locking pin 125 of the movable locking part 120 can be inserted in the On state (energized state, closed state) of the disconnector and the Off state of the disconnector ( open state) may be composed of a second locking hole 54 into which the locking pin 125 can be inserted.

The locking holes 52 and 54 are formed in an inclined direction at a predetermined angle with the axial direction B of the drive shaft 50 . For example, the first locking hole 52 and the second locking hole 54 may be formed in directions perpendicular to the axial direction B of the drive shaft 50 . In addition, the first locking hole 52 and the second locking hole 54 cross each other while forming a predetermined angle. For example, the first locking hole 52 and the second locking hole 54 may cross each other at an angle of 90 degrees.

Here, the axial direction of the first locking hole 52 in the On state will be referred to as an action axis (A). The acting axis (A) becomes an axial direction in which the movable locking part 120 and the locking pin 125 operate.

Links 44 and 46 connecting the driving shaft 50 and the movable contact 30 are provided. A plurality of links 44 and 46 may be provided. For example, the link may be composed of a lower link 44 fixed to the driving shaft 50 and rotating together with the driving shaft 50 and an upper link 46 connected between the lower link 44 and the movable contact 30. there is. When the drive shaft 50 rotates, the movable contact 30 is rotated via the lower link 44 and the upper link 46. At this time, the movable contactor 30 rotates around the rotation shaft 31 and is separated from the fixed contactor 20 or comes into contact with the fixed contactor 20 to open and close the circuit.

A drive shaft locking device 100 is provided to prevent rotation of the drive shaft 50 . The drive shaft locking device 100 restricts the rotation of the drive shaft 50 in the On state and Off state of the disconnector so as to maintain the once set state (On state or Off state). In order to rotate the drive shaft 50 to change the state of the disconnector, the drive shaft locking device 100 must first be released.

4 is a perspective view of a drive shaft locking device applied to a disconnector according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view of the drive shaft locking device viewed from another angle.

The drive shaft locking device 100 includes a fixed support 110 fixedly installed in the enclosure 10 of the disconnector, slidably installed on the fixed support 110, and a predetermined angle with respect to the axial direction B of the drive shaft 50. A movable locking part 120 coupled to or separated from the drive shaft 50 while linearly moving along the action axis A having a, an electromagnet part 130 providing electromagnetic force for moving the movable locking part 120, It includes a transmission part 140 that moves by the electromagnetic force of the electromagnet part 130 and acts on the movable locking part 120 .

The fixed support 110 is fixed to the enclosure 10 of the disconnector and supports other components of the drive shaft locking device 100. The fixed support 110 is made of a hard material such as steel or reinforced plastic to have sufficient bearing capacity.

The electromagnet part 130 is accommodated and installed in the fixed support part 110, and the movable locking part 120 is slidably installed.

The fixed support 110 may have a 'ㅁ'-shaped structure in which a part is open. That is, a portion of the 'ㅁ'-shaped structure is cut to form an open structure having an open portion. The fixed support 110 may be formed to have the 'ㅁ'-shaped structure by bending a flat plate. Each surface of this structure is divided, and a pair of facing surfaces is referred to as the front surface of the fixing part 111 and the rear surface of the fixing part 112, and the other pair of facing surfaces is referred to as the first side surface of the fixing part 113 and the fixing part. It will be referred to as the second side surface 114 . Here, the second side surface 114 of the fixing part and the rear surface 112 of the fixing part may be spaced apart from each other at a predetermined interval. That is, an opening is formed between the second side surface 114 of the fixing part and the rear surface 112 of the fixing part. The open portion of the fixed support 110 is required to insert and couple the movable locking portion 120 thereto.

The fixing part rear surface 112 of the fixing support part 110 is fixed to the enclosure 10 (see FIG. 3). For example, the fixing part rear surface 112 of the fixing support part 110 is fixedly supported on the front plate 11 . The rear surface 112 of the fixing unit may be fixedly supported to the front plate 11 of the enclosure 10 by fastening screws.

The electromagnet unit 130 is accommodated inside the fixed support unit 110 . The electromagnet unit 130 may be fixedly installed on the front surface 111 of the fixed support unit 110 .

A first guide part 115 is provided on the first side surface 113 of the fixing part 110 of the fixing support part 110 . The first guide part 115 may be composed of a protrusion protruding inward from the first side surface 113 of the fixing part, a bar, or a pillar. Here, the first guide portion 115 protrudes in the direction of the action axis (A). The first guide part 115 may be provided in plurality. A restoring force unit 150 is inserted and installed in the first guide unit 115 .

An insertion hole 116 through which the locking pin 125 of the movable locking part 120 is supported is formed on the first side surface 113 of the fixing part 110 of the fixing support part 110 . The locking pin 125 can slide while passing through the insertion hole 116 .

A second guide hole 117 through which the second guide part of the movable locking part 120 is supported is formed on the second side surface 114 of the fixing part 110 of the fixing support part 110 . A plurality of second guide holes 117 may be formed.

A second guide hole 117 through which the second guide part of the movable locking part 120 is supported is formed on the second side surface 114 of the fixing part 110 of the fixing support part 110 . A plurality of second guide holes 117 may be formed.

A transfer support unit 118 for inserting and supporting the transfer unit 140 is formed on the second side surface 114 of the fixing unit 110 of the fixing support unit 110 . The transfer support 118 may be formed in the form of a groove or a hole. The delivery unit 140 is inserted into the delivery support unit 118 and can slide while being supported. Alternatively, the transfer support part 118 may support the pin support part 136 protruding from the rear of the electromagnet part 130 .

The movable locking part 120 is slidably installed on the fixed support part 110 and can move linearly along the action axis (A) direction. The movable locking part 120 is provided with a locking pin 125 to restrict or release rotation of the drive shaft 50 .

The movable locking part 120 may have a closed 'ㅁ'-shaped structure. That is, it may be made of a closed structure. The movable locking part 120 may be formed to have the 'ㅁ'-shaped structure by bending a flat plate. Each face of this structure is divided, and a pair of facing surfaces is referred to as the upper surface of the moving part 121 and the lower surface of the moving part 122, and the other pair of facing surfaces is referred to as the first side surface of the moving part 123 and the moving part. It will be referred to as the second side surface 124 .

While the fixed support 110 has front and rear surfaces, the movable locking unit 120 has upper and lower surfaces, so that portions thereof may be inserted and disposed to cross each other. The movable locking part 120 is disposed to be partially received inside the fixed support part 110 . (In the fixed support part and the movable support part, 'inside' refers to the inside of the 'ㅁ'-shaped structure, and 'outside' refers to the outside of the 'ㅁ'-shaped structure.) The movable locking part 120 refers to the fixed support part 110 It is inserted through the opening of the part and arranged so that it intersects. In this embodiment, the first side surface 113 of the moving part is disposed inside the fixed support part 110 and the second side surface 124 of the moving part is disposed outside the fixed support part 110 . However, other embodiments are possible. Although not separately shown, for example, a method in which the first side surface 123 of the moving part is disposed outside the fixed support part 110 and the second side surface 114 of the moving part is disposed inside the fixed support part 110 is also possible. do.

A locking pin 125 protrudes from the first side surface 113 of the movable locking unit 120 to the outside. At this time, the direction in which the locking pin 125 protrudes follows the direction of the action axis (A). The locking pin 125 is inserted into the locking holes 52 and 54 of the driving shaft 50 to restrict rotation of the driving shaft 50 . The locking pin 125 may be formed in the form of a protrusion, bar, or column having a predetermined length.

A first guide hole 126 through which the first guide part 115 of the fixed support part 110 can be supported is formed in the first side surface 123 of the moving part 123 of the movable locking part 120 . The first guide part 115 of the fixed support part 110 may slide along the first guide hole 126 .

A second guide part 127 is provided on the second side surface 124 of the moving part 120 of the movable locking part 120 . The second guide part 127 may be composed of a protrusion protruding inward from the second side surface 124 of the moving part, a bar, or a pillar. Here, the second guide part 127 protrudes in the direction of the action axis (A). The second guide part 127 may be provided in plurality. The second guide part 127 is inserted through the second guide hole 117 of the fixed support part 110 to receive support. The second guide part 127 may slide along the second guide hole 117 .

Although not shown separately, depending on the embodiment, the above guide portion and the guide hole may be configured opposite to each other. For example, a method in which the first guide part and the second guide hole are provided in the movable locking part 120 and the second guide part and the first guide hole are provided in the fixed support part 110 is also possible.

An electromagnet unit 130 is provided. The electromagnet unit 130 provides mechanical force for linear movement of the movable locking unit 120 . The electromagnet unit 130 may provide an actuating force to the movable locking unit 120 by force due to electromagnetic force. A transfer unit 140 is added to the electromagnet unit 130 to provide force for moving the movable locking unit 120 .

The electromagnet unit 130 is configured to operate according to the principle of an electromagnet. The configuration and operation of the electromagnet unit 130 will be described with reference to FIGS. 6 and 7 . In FIG. 6 , the electromagnet unit 130 is in an Off state, and in FIG. 7 , the electromagnet unit 130 is in an On state.

The electromagnet part 130 may be provided with a bracket 131 for fixing to the fixed support part 110 . The electromagnet part 130 may be provided with a bracket 131 formed in a 'c' shape to support the coil part and fix it to the fixed support part 110 . The bracket 131 may be fixed to the fixing support 110 by fastening screws.

The electromagnet unit 130 is provided with a coil 132 connected to a control power supply. The coil 132 may be wound in a cylindrical shape. Coil 132 may be wound around bobbin 138 .

A fixed core 133 and a movable core 134 made of an iron core are disposed spaced apart from each other in a hollow portion penetrating along the central axis of the coil 132, that is, in the hollow portion of the bobbin 138. The fixed core 134 is fixedly installed at one end of the hollow part, and the movable core 134 is installed movably linearly at the other end of the hollow part. The fixed core 133 and the movable core 134 are made of a magnetic material such as an iron core.

At one end of the fixed core 133, a pin support portion 136 supporting the transmission portion 140 may be protruded. The pin support 136 may be inserted into and fixed to the transfer support 118 of the fixing support 110 . The pin support part 136 is formed as a tube and the transmission part 140 is inserted into it.

A return spring 135 is provided to separate the movable core 134 from the fixed core 134. The force of the return spring 135 acts in a direction in which the movable core 134 moves away from the fixed core 134 .

The electromagnet unit case 139 is coupled to one side of the bobbin 138 or the bracket 131 to support the movable core 134.

When a control power source providing current to the electromagnet unit 130 is introduced and an induced electromotive force is generated in the coil 132, the fixed core 134 is magnetized and has a magnetic force, and thus the movable core 134 is connected to the fixed core 134. ) is aspirated.

The electromagnet part 130 is provided with a spring support part 137 or a spring seating part. The spring support 137 may be provided in the electromagnet case 139 .

The transmission unit 140 is provided to operate the movable locking unit 120 by transmitting the force of the electromagnet unit 130 .

The delivery unit 140 may be composed of a delivery pin protruding from one end of the movable core 134 . The transmission part 140 protrudes in the direction of the action axis (A). The transmission part 140 slides through the pin support part 136 of the fixed core 133.

The delivery unit 140 may be disposed in front or rear of the electromagnet unit 130 . In this embodiment, the delivery unit 140 is disposed behind the electromagnet unit 130 and acts in a way to push the movable locking unit 120, but as another embodiment, although not shown separately, the delivery unit 140 It may be provided in front of the electromagnet unit 130 and installed in the form of pulling the movable locking unit 120.

A restoring force unit 150 is provided to return the movable locking unit 120 to its original position. The restoring force unit 150 may be composed of a compression spring.

The restoring force part 150 is inserted into the first guide part 115 of the fixed support part 110 . The restoring force part 150 is installed between the first side surface 123 of the movable part 123 of the movable locking part 120 and the spring support part 137 of the electromagnet part 130 . When the electromagnet unit 130 is in an On state, the restoring force unit 150 is compressed and elastic force is stored, and when the current flowing through the coil 132 of the electromagnet unit 130 is blocked and the electromagnet unit 130 is in an Off state, the restoring force unit 150 returns the movable locking part 120 to its original position by restoring force.

Although not shown separately, as another embodiment, the restoring force part 150 is inserted into the first guide part 115 of the fixed support part 110, and the first side surface 113 of the fixing part 113 and the movable locking part of the fixed support part 110 are inserted. It may be composed of a tension spring installed between the first side surface 123 of the moving part 120.

Let's take a look at the operation of the drive shaft locking device of the disconnector according to an embodiment of the present invention. 8 shows a case where the drive shaft locking device 100 of the disconnector is in an Off state, and FIG. 9 shows a case in which the drive shaft locking device 100 of the disconnector is in an On state.

As shown in FIG. 8 , when the drive shaft locking device 100 of the disconnector is in an Off state, the movable locking part 120 is moved forward (right side in the drawing) by the elastic force of the restoring force part 150. At this time, the locking pin 125 of the movable locking part 120 protrudes and is inserted into the locking holes 52 and 54 of the drive shaft 50 of the disconnector. Therefore, the drive shaft locking device 100 of the disconnector restricts rotation of the drive shaft 50 of the disconnector. The disconnector is locked in the energized state (closed state, on state) or open state (off state) and prevents any state change.

When changing the state of the disconnector, first, the drive shaft locking device 100 of the disconnector must be operated to release the restraint on the drive shaft 50. The user inputs control power to generate electromagnetic force of the electromagnet unit 130 so that the movable locking unit 120 operates.

9 shows a case where the drive shaft locking device 100 of the disconnector is in an On state. The transmission part 140 is moved by the electromagnetic force of the electromagnet part 130 and pushes the movable locking part 120 backward. In this embodiment, an example in which the transmission unit 140 pushes the second side surface 124 of the moving unit 124 of the movable locking unit 120 is shown. As the movable locking part 120 moves, the locking pin 125 comes out of the locking holes 52 and 54 of the driving shaft 50 and the restraint of the driving shaft 50 is released. The user can then change the state of the disconnector by inputting power to the disconnector.

According to the drive shaft locking device of the disconnector according to an embodiment of the present invention, since the coil unit and the locking unit are not integrally configured but are separated, the coil unit is not directly affected by the rotation of the driving shaft and is thus protected.

Since the locking pin inserted into the driving shaft is integrally formed with the movable locking unit and has excellent holding power, it is not easily deformed or damaged even when rotational force is applied to the driving shaft in the inserted state.

Since the movable locking part is installed on the fixed support part and receives support, it is not easily deformed or damaged even if it receives the force of the driving shaft.

Since the coil part is installed on the fixed support and separated from the locking pin by the transmission part, it does not directly receive the force of the drive shaft and is not deformed or damaged.

The embodiments described above are embodiments implementing the present invention, and various modifications and variations may be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. That is, the protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10 enclosure
11 front panel
12 bottom plate
13 backplane
20 fixed contact
30 movable contactor
40 driving unit
50 drive shaft
52,54 lock hole
100 drive shaft lock
110 fixed support
115 first guide unit
116 insertion hole
117 2nd guide hole
118 transmission support
120 movable lock
125 lock pin
126 first guide hole
127 second guide unit
130 electromagnet part
131 bracket
132 fixed core
134 movable core
135 return spring
136 pin support
137 spring support
138 bobbin
139 Electromagnet Case
140 transmission unit
150 restoring force

Claims (18)

A fixed contact connected to a circuit, a movable contact that is in contact with or separated from the fixed contact and energizes or blocks the circuit, a drive shaft that operates the movable contact, and a drive shaft that is coupled to or separated from the drive shaft and restricts or releases the rotation of the drive shaft. In the drive shaft locking device of the disconnector including the locking device,
The drive shaft locking device,
a fixed support portion fixed to the disconnector;
a movable locking unit that is slidably installed on the fixed support unit and coupled to or separated from the drive shaft while linearly moving along an action axis intersecting an axial direction of the drive shaft at a predetermined angle;
an electromagnet unit fixed to the fixed support unit and providing electromagnetic force for moving the movable locking unit;
A transfer unit provided in the electromagnet unit and moving by the electromagnetic force of the electromagnet unit to act on the movable locking unit;
When the driving shaft locking device is in an off state, the movable locking unit moves forward and is inserted into the locking hole of the driving shaft to restrict rotation of the driving shaft;
When the driving shaft locking device is in an On state, the transfer unit moves by the electromagnetic force of the electromagnet unit to push the movable locking unit backward, and the movable locking unit comes out of the locking hole of the driving shaft to release the restraint on the driving shaft. Drive shaft locking device of the disconnector, characterized in that being. delete The drive shaft locking device of a disconnector according to claim 1, wherein the fixing support part is formed in a 'square' shape, and a part thereof is cut to form an open structure having an open part. The drive shaft locking device of claim 1, wherein a first guide part protrudes from the first side surface of the fixing support part along the direction of the action axis. The drive shaft locking device of claim 1, wherein a transmission support portion for inserting and supporting the transmission portion is formed in a groove or a hole on the second side surface of the fixing support portion. The drive shaft locking device of claim 1, wherein the movable locking part is formed in a 'square' shape. [4] The drive shaft locking device of claim 3, wherein the movable locking part is inserted through the opening part and a part of the locking part is alternately arranged with the fixed support part. The drive shaft locking device of claim 1, wherein a locking pin that can be inserted into the locking hole protrudes from the first side of the movable locking part along the direction of the action shaft. [Claim 5] The drive shaft locking device of claim 4, wherein a first guide hole through which the first guide part can be supported is formed on the first side surface of the movable locking part. The drive shaft locking device of claim 1, wherein a second guide part protrudes from the second side of the movable locking part in the direction of the action axis. [Claim 11] The drive shaft locking device of claim 10, wherein a second guide hole through which the second guide part can be supported is formed on the second side surface of the fixing support part. The drive shaft locking device of claim 1, wherein the electromagnet unit is provided with a bracket for fixing to the fixing support unit. The drive shaft locking device of claim 1, wherein the electromagnet unit comprises a coil wound in a cylindrical shape, a fixed core and a movable core spaced apart from each other in the hollow of the coil. [14] The drive shaft locking device of claim 13, wherein a pin support portion supporting the delivery portion protrudes in a tubular shape at one end of the fixed core. The drive shaft locking device of claim 4, further comprising a restoring force unit for returning the movable locking unit to its original position. 16. The drive shaft locking device of claim 15, wherein the restoring force part is composed of a compression spring inserted into the first guide part. [16] The drive shaft locking device of claim 15, wherein a spring support portion supporting one end of the restoring force portion is provided in the electromagnet portion. [15] The drive shaft locking device of claim 14, wherein the transmission part is composed of a transmission pin protruding from one end of the movable core and slidingly moving through the pin support part.

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