KR101304078B1 - Actuator having interlock function and electric power switching apparatus with thereof - Google Patents

Abstract

PURPOSE: A manipulator having an interlock function and an electric power switching apparatus using the same are provided to implement an interlock without an incorrect operation with the flow of magnetic flux of a permanent magnet. CONSTITUTION: A driving permanent magnet (44) is installed on the lower side of a driving magnetic flux board (42). A movable core (46) is installed in order to be extended to a path (12) from the lower side of the driving permanent magnet. An opening spring (50) elastically supports the driving magnetic flux board to an open position. A middle part of an armature lever (70) is hinged on the external surface of a fixing magnetic flux board (30). An armature permanent magnet (80) is installed on a top end part of the armature lever.

Description

Manipulator having interlock function and power switch using the same {ACTUATOR HAVING INTERLOCK FUNCTION AND ELECTRIC POWER SWITCHING APPARATUS WITH THEREOF}

The present invention relates to a manipulator capable of preventing accidents operating in an unintended direction due to unexpected external force or inadvertent use, and in particular, to provide a force for interlocking or interlocking release. The present invention relates to a manipulator having an interlock function capable of performing an interlock without a malfunction by only the flow of magnetic flux by a permanent magnet without the need for additional installation of a mechanism, and a power switching device using the same.

Patent Documents 1 to 3, the manipulator for moving the mover by the electromagnetic force generated by applying a current to the excitation coil, and using the manipulator to cut off (open) or connect (input) the power supplied to the load in the power system Various examples of power switches are disclosed.

Such manipulator and power switch are operated when the current is supplied to the excitation coil, the mover moves to the first position (injection position), closes the contact between the power supply side and the load side to supply power to the load side, and opens when the current to the excitation coil is blocked. By the restoring force of the spring, the mover moves to the second position (open position) to open the contacts between the power supply side and the load side to cut off the power supplied to the load side.

However, when the power switch is opened and the power supplied to the load is cut off due to an accident current, the mover is pressed by an unexpected external physical force such as a manager's mistake or any external shock or vibration. The opening spring is pressed by the external force, and the mover moves in the first direction (injection direction), thereby causing an electrical accident.

In order to prevent such a phenomenon, Patent Literature 1 provides an interlocking guide to a movable member, a magnetizing member is installed around the stator, and an armature is installed by supporting a leaf spring or a tension spring on one side of the magnetizing member. In case of normal closing, the armature is pulled by the magnetic force of the coil to release the interlock, and in the opening, the armature is returned to the interlock position by the restoring force of the leaf spring or tension spring when the magnetic force is lost. An apparatus is disclosed.

However, such a device must be equipped with springs and other complicated devices to prevent malfunctions, so that the smooth operation can be achieved only when the magnitude of the magnetic force by the coil excitation overcomes the spring force.

Therefore, not only the mechanical complexity of additionally installing a separate force providing mechanism for the interlock like a spring, but also has a problem that a force providing mechanism such as a spring must always be kept constant. In this case, the unique properties and dimensions of the spring, the installation position, etc. must be precisely manufactured and uniformly adjusted for every device, and there is a difficulty in solving the problem that the elasticity of the spring decreases over time.

Registered Patent Publication No. 10-1109099 (January 31, 2012) Publication No. 10-2011-0094658 (published Aug. 24, 2011) Published Utility Model Publication No. 20-2011-0008811 (Published September 16, 2011)

The present invention has been developed to solve the above problems, the manipulator having an interlock function that can implement the interlock without a malfunction by a simple structure without using a spring and other complicated devices associated with it and the power using the same It is an object to provide a switchgear.

In order to achieve the above object, the manipulator having an interlock function according to the present invention includes: an excitation coil 10 wound while forming a passage 12 in the center; A fixed magnetic flux plate 30 surrounding a portion of the bottom and side circumferences of the excitation coil 10; A movable magnetic flux plate 42 disposed at an upper portion of the excitation coil 10 and extending in a form to cover an end portion of the fixed magnetic flux plate 30; A movable permanent magnet 44 installed on a lower surface of the movable magnetic flux plate 42; A movable iron core 46 installed to extend into the passage 12 from a lower surface of the movable permanent magnet 44; An opening spring 50 disposed between the excitation coil 10 and the movable magnetic flux plate 42 to elastically support the movable magnetic flux plate 42 in an open position; An armature lever 70 hinged to an outer surface of the fixed magnetic flux plate 30 so that the upper and lower longitudinal middle portions thereof are hinged so that the upper end portion is interlocked under the movable magnetic flux plate 42 or interlocked outwardly; And the armature lever 70 acting on the magnetic force of the movable permanent magnet 44 to maintain the magnetic pole direction acting on the movable magnetic flux plate 42 and the attraction force Fa and acting on the fixed magnetic flux plate 30 and the repulsive force Fb. Amateur permanent magnet 80 is installed in the upper end of the).

In the manipulator of the present invention, the fixed coil core 20 is inserted into the lower end of the passage 12 of the excitation coil 10 and installed in contact with the bottom 32 of the fixed magnetic flux plate 30. do.

In the manipulator of the present invention, the fixed magnetic flux plate 30 includes a bottom portion 32 and a side portion 34, and a hinge block 62 is installed on the side portion 34 of the fixed magnetic flux plate 30. The intermediate portion of the armature lever 70 is pivotally hinged by the hinge shaft 60 to the hinge block 62.

In addition, the armature lever 70, the upper extension portion 72 extending upward from the intermediate hinge portion and the armature permanent magnet 80 is disposed at the end, and extends downward from the intermediate hinge portion and the upper extension portion ( When 72 is rotated outward, an end portion consists of a lower extension 74 which contacts the stationary magnetic flux plate 30 and prevents further rotation.

In the manipulator of the present invention, when the current is interrupted in the excitation coil 10 and the movable magnetic flux plate 42 is positioned in the open position by the elastic restoring force of the opening spring 50, the armature permanent magnet 80 And the distance Da between the armature permanent magnet 80 and the permanent magnetic flux plate 42 is farther than the distance Db between the armature permanent magnet 80 and the fixed magnetic flux plate 30 between the armature permanent magnet 80 and the movable magnetic flux plate 42. The attraction force Fa is smaller than the magnitude of the repulsive force Fb between the armature permanent magnet 80 and the fixed magnetic flux plate 30; The moving magnetic flux plate 42 starts to descend to the input position by any external force in the state where the current is cut off in the excitation coil 10, and thus the distance between the movable magnetic flux plate 42 and the armature permanent magnet 80 ( At the point where Da) is closer than the distance Db between the fixed magnetic flux plate 30 and the amateur permanent magnet 80, the attraction force Fa between the amateur permanent magnet 80 and the movable magnetic flux plate 42 is the amateur permanent magnet. As the armature permanent magnet 80 is pulled toward the movable magnetic flux plate 42 as it becomes larger than the repulsive force Fb between the 80 and the fixed magnetic flux plate 30, the upper end of the armature lever 70 moves toward the movable magnetic flux plate 42. It rotates so that it may be located below, and it consists of a structure which the movement of the movable magnetic flux plate 42 descending to an injection position is inhibited.

Power switching device according to the present invention, the holder 90 is integrally coupled to the movable magnetic flux plate 42 of the manipulator having an interlock function; A body 100 extending from the holder 90; Movable contacts (110, 112) installed on both sides of the body (100); And a power supply side terminal 120 and a load side terminal 130 which are disposed at intervals below the two movable contacts 110 and 112, respectively, and when the current is applied to the excitation coil 10 of the manipulator, the movable magnetic flux. The plate 42, the movable permanent magnet 44 and the movable core core 46 are lowered to the input position so that the movable contacts 110 and 112 are connected to the power supply terminal 120 and the load terminal 130 so that power is supplied to the load side. When the current is supplied to the excitation coil 10 of the manipulator, the movable magnetic flux plate 42, the movable permanent magnet 44, and the movable core core 46 are raised to the open position by the restoring force of the opening spring 50. The movable contacts 110 and 112 are separated from the power supply terminal 120 and the load terminal 130 so that power is cut off to the load side.

According to the manipulator and power switch device having an interlock function according to the present invention, the flow of magnetic flux by a permanent magnet without the need for additionally installing a complex and uncertain force providing mechanism such as a spring and its mechanism for interlock or interlock release. Only an interlock without malfunction can be realized.

1 is a view showing the structure of a manipulator according to the present invention.
Fig. 2 is a diagram showing the dynamics of the magnetic flux and the armature permanent magnet when the mover is in the second position (open position).
FIG. 3 is a view showing a state in which the movable magnetic flux plate is close to the armature permanent magnet by being pressed in the first direction (injection direction) arbitrarily in FIG.
4 is a view showing a state in which the interlock is made by the mover further pressed in the first direction (injection direction) in FIG.
5 is a perspective view showing a power switch according to the present invention.
6 is a front sectional view of FIG. 5.

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

1 is a view showing the structure of a manipulator according to the present invention.

As shown in FIG. 1, the manipulator having an interlock function includes: a magnetic coil 10 wound while forming a passage 12 in the center thereof, and a fixed magnetic flux plate surrounding a lower portion of the female coil 10 and a portion around the side surface thereof ( 30, a movable permanent magnet 44 disposed at an upper portion of the excitation coil 10 at intervals, and a movable permanent magnet 44 and a movable core core 46 sequentially installed on the lower surface of the movable permanent magnet 44. ).

A fixed iron core 20 may be further installed at the lower end of the passage 12 of the excitation coil 10, thereby cooperating with the mover 40 to form a magnetic path to smooth the flow of the magnetic flux. Can be. The fixed core core 20 is inserted into the lower end of the passage 12 and provided to contact the bottom 32 of the fixed magnetic flux plate 30.

The fixed magnetic flux plate 30 includes a bottom portion 32 that wraps across the bottom of the female coil 10, and a side portion 34 that extends upwardly from the bottom portion 32 and covers the side surface of the female coil 10. . The end portion of the side part 34 is formed to protrude further from the excitation coil 10 so as to maintain the distance as close as possible to the movable magnetic flux plate 42 when the mover 40 moves downward.

In addition, an opening spring 50 is disposed between the exciting coil 10 and the movable magnetic flux plate 42 to elastically support the movable magnetic flux plate 42 to the open position.

The movable core core 46 is installed to extend from the lower surface of the movable permanent magnet 44 into the passage 12 in the center of the excitation coil 10, and is pulled downward by the excitation of the excitation coil 10 to fix the magnetic flux plate. Move until it approaches 30.

The movable magnetic flux plate 42 is formed in a form extending to both sides (both left and right sides in the drawing) so as to cover both end portions of the fixed magnetic flux plate 30. In the state where the movable element 40 is moved to the feeding position (lower in the drawing), the fixed magnetic flux plate 30 and the movable magnetic flux plate 42 are kept very close so that the magnetic flux by the excitation of the excitation coil 10 flows smoothly. It can provide a strong input force.

In the drawing, when an excitation current is applied to the excitation coil 10, an electromagnetic force is generated by the Fleming's left-hand law, and accordingly the movable core core 46 and the movable permanent magnet 44 are pulled down to move the movable element ( 40) is located at the 'insertion position'.

If the control unit blocks the current flowing in the excitation coil 10 for reasons such as a fault current generation, the force pulling the mover 40 to the closing position is removed, and accordingly the mover 40 is released by the elastic restoring force of the opening spring 50. ) Rises to the 'open position'.

On the other hand, the outer surface of the fixed magnetic flux plate 30 is provided with an armature for interlock, its interlock armature is the above-described fixed magnetic flux plate 30, the movable magnetic flux plate 42, the movable permanent magnet 44 In combination with the special configuration of the movable core core 46, the movable member 40 is prevented from descending in the input direction arbitrarily.

Specifically, the interlock armature includes an armature lever 70 and an armature permanent magnet 80.

The armature lever 70 is hinged by the hinge shaft 60 on the upper and lower longitudinal middle portions on the outer surface of the fixed magnetic flux plate 30, and the seesaw movement is carried out about the hinge shaft 60 so that its upper end portion is movable magnetic flux. Enter the bottom of the plate 42 to interlock or outward to interlock.

In this embodiment, the armature lever 70 includes an upper extension 72 extending upwardly from the intermediate hinge portion and having an armature permanent magnet 80 disposed at an end thereof, and extending downwardly from the intermediate hinge portion and extending upward. When the portion 72 rotates outward, an end portion thereof consists of a lower extension portion 74 which contacts the stationary magnetic flux plate 30 and prevents further rotation.

The armature lever 70 is provided with a hinge block 62 on the side portion 34 of the fixed magnetic flux plate 30, and the hinge shaft 60 of the armature lever 70 in the hinge block 62 thereof. The hinge configuration is rotatable.

The armature permanent magnet 80 is embedded in the upper end of the armature lever 70, that is, the upper extension 72.

As shown in FIG. 2, the armature permanent magnet 80 actuates the movable magnetic flux plate 42 and the attractive force Fa on the magnetic force of the movable permanent magnet 44 and the fixed magnetic flux plate 30 and the repulsive force Fb. It is arranged to maintain the direction of the magnetic pole acting.

In addition, as shown in FIG. 2, when the movable member 40 is positioned in the open position, the distance Da between the armature permanent magnet 80 and the movable magnetic flux plate 42 is equal to the armature permanent magnet 80. The distance between the stationary magnetic flux plates 30 is maintained at a distance Db.

Therefore, when the movable element 40 is positioned in the open position, the magnitude of the attraction force Fa between the armature permanent magnet 80 and the movable magnetic flux plate 42 is such that the armature permanent magnet 80 and the fixed magnetic flux plate 30 are formed. Smaller than the size of the repulsion force (Fb) in between, the armature permanent magnet 80 is pushed outward and the armature lever 70 is maintained in a state rotated outward.

3 to 4 are diagrams for explaining the interlock process.

When the mover 40 is pushed due to an unexpected external force such as external shock or vibration while the mover 40 is located in the open position (Fig. 2 state) due to the occurrence of an accident current, the mover 40 As illustrated in FIG. 3, the opening spring 50 is pressed to lower the movable member 40 in the feeding direction.

When the mover 40 is arbitrarily pressed in the feeding direction as shown in FIG. 3, the movable magnetic flux plate 42 approaches the armature permanent magnet 80, and the movable magnetic flux plate 42 and the armature permanent magnet 80 are provided. The distance Da between them becomes closer than the distance Db between the fixed magnetic flux plate 30 and the amateur permanent magnet 80.

From this point of time, the attraction force Fa between the armature permanent magnet 80 and the movable magnetic flux plate 42 becomes larger than the repulsion force Fb between the armature permanent magnet 80 and the fixed magnetic flux plate 30, and thus the armature The permanent magnet 80 is pulled toward the movable magnetic flux plate 42.

As shown in FIG. 4, when the armature permanent magnet 80 is pulled toward the movable magnetic flux plate 42, the armature lever 70 rotates clockwise about the hinge axis 60 to rotate the armature lever 70. The upper end is positioned below the movable magnetic flux plate 42. As a result, the movable magnetic flux plate 42 descending to the closing position is blocked by the upper end of the armature lever 70 to prevent movement in the closing direction.

When the external force acting after the movement is prevented disappears, the mover 40 returns to the opening direction by the elastic restoring force of the opening spring 50. Then, the movable magnetic flux plate 42 is moved away from the amateur permanent magnet 80 as shown in FIG. 1, and accordingly the armature is driven by the repulsive force Fb between the fixed magnetic flux plate 30 and the amateur permanent magnet 80. By pushing the permanent magnet 80 outward, the armature lever 70 rotates counterclockwise to return to the original position.

On the other hand, in the normal closing state in which the exciting coil 10 is excited by the application of the exciting current and the movable member 40 is pulled down and moved to the closing position, the direction of the magnetic flux by the exciting of the exciting coil 10 is lowered. Part 32 flows only in the direction of the movable magnetic flux plate 42, so that even if the movable magnetic flux plate 42 comes down to a distance to be interlocked, between the movable magnetic flux plate 42 and the interlock permanent magnet 80 Since the attraction force Fa is not acted on, normal closing operation is performed without interlocking action.

5 and 6 show a power switch according to the present invention, a perspective view is shown in FIG. 5, and a front sectional view is shown in FIG.

5 and 6, the power switching device having an interlock function according to the present invention, the holder 90 is integrally coupled to the movable magnetic flux plate 42 of the manipulator, and extends from the holder 90 The power supply terminal 120 and the load side, which are arranged at intervals below the body 100, the movable contacts 110 and 112 provided on both sides of the body 100, and the movable contacts 110 and 112, respectively. And terminal 130.

In the power switching device, when the current is applied to the excitation coil 10 of the manipulator, the movable magnetic flux plate 42, the movable permanent magnet 44 and the movable core core 46 are lowered to the input position, and the movable contacts 110 and 112. ) Is connected to the power supply terminal 120 and the load terminal 130 to supply power to the load side.

In addition, when a failure occurs in the power system and the current flowing through the excitation coil 10 of the manipulator is interrupted, the movable magnetic flux plate 42, the movable permanent magnet 44, and the movable core core 46 are connected to the opening spring 50. The movable contacts 110 and 112 are lifted up to the open position by the restoring force and are separated from the power supply terminal 120 and the load terminal 130 so that electric power is cut off to the load side.

5 and 6 illustrate components such as an outer case of the power switch device in omitted form. The remaining components such as the outer case can be easily seen by referring to Patent Documents 1 to 3.

In such a power switching device, when the interlock is made, the mover 40 moves to the open position according to the occurrence of an accident current, and the movable contacts 110 and 112 are separated from the power supply terminal 120 and the load terminal 130. When the power is cut off at the load side, an unexpected external force such as external shock or vibration is applied, so that the protrusion 102 protruding to the outside of the body 100 is pressed or moves the mover 40 of the manipulator downward. A force to be applied is applied, and the opening spring 50 is pressed by the external force so that the movable member 40 and the movable contacts 110 and 112 are lowered in the input direction.

Therefore, at this time, as described above with reference to FIGS. 3 and 4, the armature permanent magnet 80 is pulled toward the movable magnetic flux plate 42 while the armature 40 descends, so that the armature lever 70 rotates. The upper end of the armature lever 70 is located below the movable magnetic flux plate 42. As a result, the movable magnetic flux plate 42 descending to the closing position is blocked by the upper end of the armature lever 70 to prevent movement in the closing direction.

10: Female coil
12: passage
20: fixed core core
30: fixed magnetic flux plate
32: bottom part
34: side part
40: mover
42: movable magnetic flux plate
44: movable permanent magnet
46: movable core core
50: opening spring
60: hinge axis
62: hinge block
70: amateur lever
72: upper extension
74: lower extension
80: Amateur permanent magnet
90 holder
100: Body
110, 112: movable contact
120: power supply terminal
130: load side terminal

Claims (6)

A winding coil 10 forming a passage 12 in the center thereof;
A fixed magnetic flux plate 30 surrounding a portion of the bottom and side circumferences of the excitation coil 10;
A movable magnetic flux plate 42 disposed at an upper portion of the excitation coil 10 and extending in a form to cover an end portion of the fixed magnetic flux plate 30;
A movable permanent magnet 44 installed on a lower surface of the movable magnetic flux plate 42;
A movable iron core 46 installed to extend into the passage 12 from a lower surface of the movable permanent magnet 44;
An opening spring 50 disposed between the excitation coil 10 and the movable magnetic flux plate 42 to elastically support the movable magnetic flux plate 42 in an open position;
An armature lever 70 hinged to an outer surface of the fixed magnetic flux plate 30 so that the upper and lower longitudinal middle portions thereof are hinged so that the upper end portion enters the lower portion of the movable magnetic flux plate 42 and interlocks or exits outward and interlocks; And
The armature lever 70 acts on the magnetic force of the movable permanent magnet 44 to maintain the magnetic pole direction acting on the movable magnetic flux plate 42 and the attraction force Fa and acting on the fixed magnetic flux plate 30 and the repulsive force Fb. Manipulator having an interlock function, characterized in that it comprises an amateur permanent magnet (80) installed on the upper end of the. The method of claim 1,
Interlock function, characterized in that it further comprises a fixed core core 20 is inserted into the lower end of the passage 12 of the excitation coil 10 and installed in contact with the bottom 32 of the fixed magnetic flux plate 30 Manipulator with. 3. The method according to claim 1 or 2,
The fixed magnetic flux plate 30 has a bottom portion 32 and a side portion 34,
The hinge block 62 is installed on the side portion 34 of the fixed magnetic flux plate 30,
And an intermediate part of the armature lever (70) is pivotally hinged by the hinge shaft (60) to the hinge block (62). The method of claim 3,
The armature lever 70 extends upward from the middle hinge portion and includes an upper extension portion 72 in which an armature permanent magnet 80 is disposed at an end thereof, and an upper extension portion 72 extending downwardly from the middle hinge portion. Manipulator having an interlock function, characterized in that the end is made of a lower extension portion (74) that contacts the stationary magnetic flux plate (30) to prevent further rotation when it rotates outward. The method of claim 1,
When the current is interrupted by the excitation coil 10 and the movable magnetic flux plate 42 is positioned in the open position by the elastic restoring force of the opening spring 50, the armature permanent magnet 80 and the movable magnetic flux plate 42 are provided. The distance Da between the armature permanent magnet 80 and the fixed magnetic flux plate 30 is greater than the distance Db so that the magnitude of the attraction force Fa between the armature permanent magnet 80 and the movable magnetic flux plate 42 is increased. Is smaller than the magnitude of the repulsive force Fb between the armature permanent magnet 80 and the fixed magnetic flux plate 30,
The moving magnetic flux plate 42 starts to descend to the input position by any external force in the state where the current is cut off in the excitation coil 10, and thus the distance between the movable magnetic flux plate 42 and the armature permanent magnet 80 ( At the point where Da) is closer than the distance Db between the fixed magnetic flux plate 30 and the amateur permanent magnet 80, the attraction force Fa between the amateur permanent magnet 80 and the movable magnetic flux plate 42 is the amateur permanent magnet. As the armature permanent magnet 80 is pulled toward the movable magnetic flux plate 42 as it becomes larger than the repulsive force Fb between the 80 and the fixed magnetic flux plate 30, the upper end of the armature lever 70 moves toward the movable magnetic flux plate 42. A manipulator having an interlock function, characterized in that movement of the movable magnetic flux plate 42 which rotates so as to be positioned below and is lowered to the feeding position is prevented. A manipulator having the interlock function according to any one of claims 1, 2, and 5;
A holder 90 integrally coupled to the movable magnetic flux plate 42 of the manipulator;
A body 100 extending from the holder 90;
Movable contacts (110, 112) installed on both sides of the body (100); And
It includes a power supply side terminal 120 and a load side terminal 130 are disposed at intervals below the two movable contacts (110, 112), respectively.
When a current is applied to the excitation coil 10 of the manipulator, the movable magnetic flux plate 42, the movable permanent magnet 44 and the movable core core 46 are lowered to the input position so that the movable contacts 110 and 112 are connected to the power supply terminal ( 120 is connected to the load side terminal 130 to supply power to the load side,
When the current is interrupted by the excitation coil 10 of the manipulator, the movable magnetic flux plate 42, the movable permanent magnet 44, and the movable core core 46 are raised to the open position by the restoring force of the opening spring 50 to move the movable contact. Power switching device (110, 112) is separated from the power supply terminal 120 and the load side terminal 130, the power is cut off to the load side.

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