TWI660388B - Electromagnetic operating mechanism and circuit breaker - Google Patents

Abstract

The invention provides an electromagnetic operating mechanism and a circuit breaker. The fixed iron core (61) of the electromagnetic operating mechanism (60) includes: a first divided iron core (81) and a second divided iron core (82) formed by laminating a plurality of magnetic plates (90); and a magnetic plate ( 91) of the first connection member (83), the second connection member (84), the third connection member (85), and the fourth connection member (86). The magnetic plate (91) has the same shape as the magnetic plate (90), and connects the first divided core (81) and the second divided core (82) in different directions from the magnetic plate (90). The magnetic plate (91) has a fixed area in a direction orthogonal to the lamination direction of the plurality of magnetic plates (90) in the first divided core (81) and the second divided core (82), toward the first At least one of the divided cores (81) and the second divided cores (82) protrudes from the outer side and is fixed to a support portion provided on the frame of the circuit breaker.

Description

Electromagnetic operation mechanism and circuit breaker

The present invention relates to an electromagnetic operating mechanism and a circuit breaker for performing a closing operation that brings a movable contact into contact with a fixed contact, or a tripping operation that moves a movable contact away from the fixed contact. .

Conventionally, as a circuit breaker that opens and closes a circuit, an electromagnetically operated circuit breaker is known. As described in Patent Document 1, an electromagnetically operated circuit breaker is provided with an electromagnetic operation mechanism for putting into operation or tripping operation in an insulating case in the circuit breaker.

The electromagnetic operation mechanism is configured to attract a movable iron core connected to a drive shaft to a fixed iron core by excitation of an electromagnetic coil. The fixed iron core of the electromagnetic operation mechanism is manufactured by laminating and integrating a plurality of magnetic plates after punching as described in Patent Document 2.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 2008-159270

Patent Document 2: Japanese Patent Application Laid-Open No. 6-89808

In the case of a circuit breaker with an electromagnetic operation mechanism, when a large force is required for the input, the output of the electromagnetic operation mechanism will also increase, and the number of laminated sheets of the magnetic plate will also increase. As the number of laminated magnetic plates increases, the unevenness in the thickness of the fixed core, which is the length of the fixed core in the laminated direction of the magnetic plate, increases.

The electromagnetic operating mechanism of a circuit breaker is generally fixed to an insulating frame, and as described in Patent Document 2, when a fixing core is fixed to a connection hole formed in a laminated layer of a magnetic plate by a screw, there are The accuracy of the operation or trip operation will be reduced due to the uneven thickness of the fixed core.

For example, in some cases, when the unevenness in the thickness of the fixed iron core becomes large, the unevenness in the position of the drive shaft becomes large, and the position of the link of the transmission mechanism connected to the drive shaft is greatly increased. Offset. In this case, the amount of movement of the movable contact by the transmission mechanism may not be secured. Furthermore, depending on the situation, the circuit breaker may become unavailable.

When the unevenness of the thickness of the fixed iron core is large, although it is necessary to consider mounting the electromagnetic operation mechanism on the frame in a direction perpendicular to the lamination direction of the magnetic plate, in the prior art, special parts or special Structure, so the composition will be complicated. Also, it is possible to increase The main reason for the uniformity is the same as that in the case where the electromagnetic operation mechanism is fixed to the housing in the laminated direction of the magnetic plate.

The present invention has been developed in view of the above-mentioned problems, and an object thereof is to obtain an electromagnetic operating mechanism capable of suppressing unevenness in the position of a drive shaft and capable of stable input operation.

In order to solve the above-mentioned problems and achieve the objective, the electromagnetic operating mechanism of the present invention is provided with: a fixed iron core; a movable iron core provided to be movable relative to the fixed iron core; and an electromagnetic coil fixed to the fixed iron core for generating A magnetic flux moves the movable core; and a drive shaft is connected to the movable core. The fixed iron core includes: a first divided iron core and a second divided iron core, each of which is formed by laminating a plurality of first magnetic plates and facing each other in a direction orthogonal to the lamination direction of the plurality of first magnetic plates; and a plurality of A connecting member for connecting the first divided core and the second divided core. Each of the plurality of connecting members has the same shape as the first magnetic plate, and is composed of a second magnetic plate that connects the first divided core and the second divided core in a direction different from that of the first magnetic plate; The second magnetic plate of at least one of the connecting members has a fixed area that protrudes outside of at least one of the first divided core and the second divided core in a direction orthogonal to the lamination direction, and is fixed to the open circuit. A support portion provided on the frame of the device.

According to the present invention, it is possible to achieve the effect of suppressing the non-uniformity of the position of the drive shaft and performing a stable input operation.

1‧‧‧frame

2‧‧‧ wall

3‧‧‧ partition

4, 5‧‧‧ support

7‧‧‧First Space Department

8‧‧‧Second Space Department

10‧‧‧ the first fixed conductor

10a‧‧‧Fixed contact

11‧‧‧ second fixed conductor

12, 62‧‧‧ electromagnetic coil

20‧‧‧ movable

20a‧‧‧movable contact

30‧‧‧ flexible conductor

41‧‧‧ Crimp Spring

42, 53‧‧‧ connecting rod pin

50‧‧‧ Delivery Department

51‧‧‧Operating arm

52‧‧‧Link board

54‧‧‧axis

55‧‧‧Axis

60, 60A‧‧‧ electromagnetic operating mechanism

61, 61A‧‧‧Fixed core

63‧‧‧ bobbin

64‧‧‧ movable iron core

65‧‧‧Drive shaft

66, 76‧‧‧Guide members

67, 95, 95a to 95f, 98, 98a to 98g

68‧‧‧ inside space

69‧‧‧ guide hole

70‧‧‧ Connection Department

71, 72‧‧‧ Link pins

73‧‧‧ connecting rod

81, 81A‧‧‧ first split core

82, 82A‧‧‧Second Split Core

83, 83A‧‧‧First connecting member

84, 84A‧‧‧Second connecting member

85, 85A‧‧‧third connecting member

86, 86A‧‧‧ Fourth connecting member

87, 87a to 87f‧‧‧ connecting bolt

88a to 88f‧‧‧ Nuts

90, 90A, 91, 91A‧‧‧ magnetic plate

92, 92A‧‧‧ extension

93, 93A‧‧‧ first protrusion

94, 94A‧‧‧Second protrusion

96, 97‧‧‧ mounting screws

100‧‧‧ Circuit Breaker

101, 111, 201, 301, 511, 521, 651‧‧‧

102, 112, 202, 302, 512, 522, 652‧‧‧ the other end

611‧‧‧First inner wall part

612‧‧‧Second inner wall section

613‧‧‧third inner wall

614‧‧‧ Fourth inner wall

831, 841, 851, 861, 911, 912A‧‧‧

Distance from L1 to L5

O1‧‧‧center axis

Fig. 1 is a schematic diagram showing a configuration example of a circuit breaker according to the first embodiment.

Fig. 2 is an exploded perspective view of the electromagnetic operating mechanism according to the first embodiment.

Fig. 3 is an external perspective view showing an assembled state of the electromagnetic operating mechanism according to the first embodiment.

Fig. 4 is a plan view of the electromagnetic operating mechanism according to the first embodiment.

Fig. 5 is a side view of the electromagnetic operating mechanism according to the first embodiment.

Fig. 6 is a schematic diagram showing a configuration example of a magnetic plate of the first embodiment.

FIG. 7 is an explanatory diagram of a method of connecting a first divided core and a second divided core by the first connecting member, the second connecting member, the third connecting member, and the fourth connecting member according to the first embodiment.

Fig. 8 is a schematic diagram showing a state where the electromagnetic operation mechanism is fixed to a support portion protruding from the partition wall of the housing of the first embodiment.

Fig. 9 is a schematic diagram showing a configuration example of a magnetic plate constituting a fixed core of an electromagnetic operating mechanism according to a second embodiment.

Fig. 10 is a plan view of an electromagnetic operating mechanism according to a second embodiment.

FIG. 11 is a schematic diagram showing a state where the electromagnetic operation mechanism is fixed to a support portion protruding from the partition wall of the casing of the second embodiment.

Fig. 12 is a plan view of an electromagnetic operation mechanism having another configuration of the second embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. State electromagnetic operating mechanism and circuit breaker. The present invention is not limited by the embodiments.

[Embodiment 1]

Fig. 1 is a schematic diagram showing a configuration example of a circuit breaker according to the first embodiment. Although the circuit breaker of the first embodiment is, for example, an air circuit breaker that opens and closes a circuit in the atmosphere, it may be applied to a circuit breaker other than an air circuit breaker. In the following, for convenience of explanation, the coordinates of the XYZ axis are attached to the drawings. In such XYZ axis coordinates, the positive direction of the Z axis is taken as the upward direction, the negative direction of the Z axis is taken as the downward direction, the positive direction of the X axis is taken as the right direction, the negative direction of the X axis is taken as the left direction, and the positive direction of the Y axis is taken. As the forward direction, the negative direction of the Y-axis is regarded as the backward direction.

As shown in FIG. 1, the circuit breaker 100 according to the first embodiment includes: an insulating housing 1; a first fixed conductor 10 connected to a power source-side conductor (not shown); and a second fixed conductor 11 connected to an unillustrated The load-side conductor is shown; the movable member 20 has a movable contact 20a; and the flexible conductor 30 is electrically connected to the second fixed conductor 11 and the movable member 20 and has flexibility.

Inside the housing 1, a first space portion 7 and a second space portion 8 are formed by being partitioned by a partition wall 3. The first fixed conductor 10 is also referred to as a power-supply-side terminal, and passes through the wall portion 2 of the frame 1 from the outside of the frame 1 and reaches the first space portion 7. One end 101 of the first fixed conductor 10 protrudes toward the outside of the housing 1 and is connected to a power source-side conductor (not shown). The other end portion 102 of the first fixed conductor 10 is disposed in the first space portion 7, and a fixed contact 10 a is fixed.

The second fixed conductor 11 is also referred to as a load-side terminal and, similar to the first fixed conductor 10, penetrates through the wall portion 2 of the frame 1 from the outside of the frame 1 and reaches the first space portion 7. One end portion 111 of the second fixed conductor 11 protrudes toward the outside of the frame 1 and is connected to a load-side conductor (not shown). The other end portion 112 of the second fixed conductor 11 is disposed in the first space portion 7.

A movable contact 20 a is provided at one end portion 201 of the movable member 20. One end portion 301 of the flexible conductor 30 is fixed to the other end portion 202 of the movable member 20. The other end portion 302 of the flexible conductor 30 is fixed to the other end portion 112 of the second fixed conductor 11.

The circuit breaker 100 is further provided with a crimping spring 41 having one end portion mounted on the other end portion 202 of the movable member 20 and the other end portion mounted on the wall portion 2 of the frame body 1 and a link pin 42 for mounting于 动 件 20。 The movable member 20. The pressure contact spring 41 is configured to urge the movable member 20 with the link pin 42 as a center so that the movable member 20 rotates so that the movable contact 20a and the fixed contact 10a are close to each other. When the movable contact 20a is already connected to the fixed contact 10a, a contact pressure is provided between the fixed contact 10a and the movable contact 20a.

The circuit breaker 100 is provided with a transmission section 50 connected to the movable member 20 by a link pin 42, an electromagnetic operation mechanism 60 that moves the movable member 20 through the transmission section 50, and a connection section 70 that connects the transmission section 50 And the electromagnetic operation mechanism 60. In addition, the transmission portion 50 is disposed across the first space portion 7 and the second space portion 8; the electromagnetic operation mechanism 60 and the connection portion 70 are disposed in the second space portion 8.

The transmission unit 50 includes an operation arm 51 and an end portion 511 of the operation arm 51. The link pin 52 is rotatably connected to the movable member 20; the link plate 52 has one end portion 521 rotatably connected to the other end portion 512 of the operation arm 51 by the link pin 53; and the shaft 54 is fixed. The central portion of the connecting plate 52 is rotated around the shaft center 55 as a center.

The transmission unit 50 is not limited to the configuration described above. For example, the transmission portion 50 may have a configuration in which the movable member 20 is connected to a front end portion of one rotating member that rotates around the shaft center 55 as a center. In addition, the transmission part 50 may have a structure having one or more link members between the operation arm 51 and the connection plate 52.

The electromagnetic operation mechanism 60 is disposed below the connection plate 52 and is fixed to the support portions 4 and 5 protruding from the partition wall 3 of the housing 1 toward the second space portion 8 side. The drive shaft 65 of the electromagnetic operation mechanism 60 is connected to the other end portion 522 of the connection plate 52 via the connection portion 70 at a position separated from the shaft center 55 of the shaft 54 by a predetermined distance.

The connecting portion 70 includes connecting pins 71 and 72 and a connecting link 73. A connection pin 71 is provided between a connection hole (not shown) formed in the connection link 73 and a connection hole 67 formed in the drive shaft 65. A connection pin 72 is provided between the other connection hole (not shown) formed in the connection link 73 and a connection hole (not shown) formed in the middle of the connection plate 52.

Here, a description will be given of an input operation as an operation of moving the movable contact 20a and contacting the fixed contact 10a. As shown in FIG. 1, when the circuit breaker 100 is in a tripped state, that is, in a state where the movable contact 20 a is separated from the fixed contact 10 a, when the drive shaft 65 of the electromagnetic operation mechanism 60 moves upward, it passes through the connection portion. 70 and connected to the drive shaft 65 The junction plate 52 is driven via the connection portion 70 and rotates with the shaft center 55 as a center in a direction in which the one end portion 521 is lowered.

When the shaft 54 is rotated in the direction in which the one end portion 521 is lowered, the operation arm 51 is driven by the link plate 52 via the link pin 53 and is aligned in a straight line in the length direction of the link plate 52. When the operation arm 51 is driven, the movable member 20 moves while compressing the compression contact spring 41 toward the wall portion 2 side, and the movable contact point 20a contacts the fixed contact point 10a.

After the movable contact point 20a contacts the fixed contact point 10a, the movable member 20 rotates in a direction in which the movable contact point 20a approaches the fixed contact point 10a by using the contact spring 41 with the link pin 42 as a center, thereby enabling the fixed contact point The contact pressure is provided between the point 10a and the movable contact 20a, and the circuit breaker 100 is turned on. When the circuit breaker 100 is in the on state, the first fixed conductor 10 is electrically connected to the second fixed conductor 11 through the fixed contact 10a, the movable contact 20a, the movable member 20, and the flexible conductor 30.

The circuit breaker 100 includes a holding mechanism (not shown). With such a holding mechanism, the above-mentioned input state is maintained. By releasing the holding of the holding state by the holding mechanism, each member moves in the reverse direction of the putting operation, and the movable contact 20a becomes a position separated from the fixed contact 10a and becomes a tripped state shown in FIG. 1.

As described above, the circuit breaker 100 according to the first embodiment performs the input operation from the trip state to the input state by moving the drive shaft 65 of the electromagnetic operation mechanism 60 upward.

Hereinafter, the configuration of the electromagnetic operation mechanism 60 will be specifically described. Fig. 2 is an exploded view of the electromagnetic operating mechanism of the first embodiment; Body view, FIG. 3 is an external perspective view showing the assembled state of the electromagnetic operation mechanism of Embodiment 1, FIG. 4 is a top view of the electromagnetic operation mechanism of Embodiment 1, and FIG. 5 is a side view of the electromagnetic operation mechanism of Embodiment 1. . In addition, in FIGS. 2 to 5, the coordinates of the XYZ axis are attached so that the state of the electromagnetic operation mechanism 60 in FIG. 1 becomes a front view of the electromagnetic operation mechanism 60.

As shown in FIG. 2 and FIG. 3, the electromagnetic operating mechanism 60 includes: a fixed iron core 61; a cylindrical electromagnetic coil 62 fixed to the fixed iron core 61; and an insulating bobbin 63. It can be used for coil winding; the movable iron core 64 is inserted into the inner space of the bobbin 63; the drive shaft 65 is connected to the movable iron core 64; and the guide member 66 is used to guide the upper and lower directions of the drive shaft 65. mobile.

As shown in FIG. 2, the fixed iron core 61 has an inner space 68, and an electromagnetic coil 62 and a bobbin 63 are arranged in the inner space 68 of the fixed iron core 61. A connection hole 67 is formed at one end portion 651 of the drive shaft 65, and the drive shaft 65 is connected to the other end portion 522 of the connection plate 52 shown in FIG. 1 using the connection hole 67. The other end portion 652 of the drive shaft 65 is fixed to the movable core 64.

When an exciting current is supplied to the electromagnetic coil 62, a magnetic flux is generated from the electromagnetic coil 62. By the action of the magnetic flux from the electromagnetic coil 62, the movable iron core 64 is attracted by the fixed iron core 61 and moves upward, and abuts against the first inner wall portion 611 of the fixed iron core 61 shown in FIGS. 2 and 4. And the second inner wall portion 612 is stationary. As the fixed iron core 61 moves upward, the drive shaft 65 moves upward.

In addition, the third inner wall portion 613 and the fourth inner wall portion 614 of the fixed core 61 shown in FIG. 2 are arranged so as to abut the middle portion of the movable iron core 64 in the tripped state shown in FIG. 1. And the movable iron core 64 is made to stand still. In addition, the shapes of the third inner wall portion 613 and the fourth inner wall portion 614 are not limited to those shown in FIG. 2 as long as they are in contact with the movable iron core 64 and made stationary.

The fixed iron core 61 includes: a first divided iron core 81 and a second divided iron core 82, and a plurality of magnetic plates 90 are formed by being laminated in the same direction and facing each other; and a first connecting member 83 and a second The connection member 84, the third connection member 85, and the fourth connection member 85 are each constituted by one or more magnetic plates 91, and are used to connect the first divided core 81 and the second divided core 82. Furthermore, in the first divided core 81 and the second divided core 82, the plurality of magnetic plates 90 formed by lamination are integrated by caulking, bonding, and welding.

The magnetic plate 90 and the magnetic plate 91 have the same shape, and are formed by, for example, punching a magnetic plate of a so-called silicon steel plate. The magnetic plate 90 is an example of a first magnetic plate, and the magnetic plate 91 is an example of a second magnetic plate. Fig. 6 is a schematic diagram showing a configuration example of a magnetic plate of the first embodiment. In FIG. 6, the upward direction is defined as the positive Z-axis direction, the downward direction is defined as the negative Z-axis direction, and the right direction is defined as the positive X-axis direction.

As shown in FIG. 6, each of the magnetic plates 90 and 91 includes: an extending portion 92 extending upwardly; a first protruding portion 93 protruding rightward from an upper portion of the extending portion 92; and a second protruding portion 94, protruding from the lower part of the extension part 92 to the right. At extension 92, A plurality of connection holes 95a to 95e are formed in a downward direction. A connection hole 95f is formed at an end portion before the first protruding portion 93. Hereinafter, the connection holes 95a to 95f may be collectively referred to as the connection holes 95 in some cases.

The connection hole 95e is located farther from the connection hole 95a than the connection hole 95d, and the distance L1 between the connection hole 95a and the connection hole 95e is longer than the distance L2 between the connection hole 95a and the connection hole 95d. The end portion 911 of the magnetic plate 91 shown in FIG. 6 is used for fixing to the housing 1 as described later. In addition, since the size of the distance L1 is changed according to the required performance of the electromagnetic operating mechanism 60, the size of the electromagnetic operating mechanism 60 can be changed when the magnetic plate 90 and the magnetic plate 91 are stacked in different directions. The position of the hole 95 is arbitrarily set according to the external dimensions under the restriction that the position of the hole 95 is aligned.

Hereinafter, although an example in which each of the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 is constituted by one magnetic plate 91 is described, a plurality of magnetic plates 91 may be used. Laminated in the same direction. In the examples shown in FIGS. 2 to 5, although the first divided core 81 and the second divided core 82 are formed by laminating 19 magnetic plates 90, the number of laminated magnetic plates 90 is the same. It can also be 18 pieces or less and 20 pieces or more.

In some cases, the first protruding portion 93 and the second protruding portion 94 of the magnetic plate 90 are described as the first protruding portion 93 and the second protruding portion 94 of the first divided core 81, and in some cases, the magnetic plate is described. The first protrusion 93 and the second protrusion 94 of 90 are described as the first protrusion 93 and the second protrusion 94 of the second divided core 82. In this case, the first connection member 83, The same applies to the second connection member 84, the third connection member 85, and the fourth connection member 86.

In the assembled state of the electromagnetic operating mechanism 60, the first divided core 81 and the second divided core 82 are arranged in mutually mirror-symmetrical directions, and in the protruding direction of the first protruding portion 93 and the second protruding portion 94. Face each other.

A guide member 66 shown in FIG. 2 is arranged between the first protruding portion 93 of the first divided core 81 and the first protruding portion 93 of the second divided core 82. The guide member 66 is provided with a guide hole 69 through which the drive shaft 65 can be inserted, and is held between the first protruding portion 93 of the first divided core 81 and the first protruding portion 93 of the second divided core 82.

As shown in FIG. 5, the first divided core 81 and the second divided core 82 are connected to one end side in the laminated direction of the magnetic plate 90, and are connected by the first connecting member 83 and the second connecting member 84. The other end side of the magnetic plate 90 in the stacking direction is connected by a third connection member 85 and a fourth connection member 86. The first divided core 81 and the second divided core 82 are connected to each other by fixing the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 to the connection bolts 87a to 87f. The first divided core 81 and the second divided core 82 are performed.

FIG. 7 is a connection between the first divided core 81 and the second divided core 82 connected by the first connecting member 83, the second connecting member 84, the third connecting member 85, and the fourth connecting member 86 of the first embodiment. An illustration of the method. In addition, for convenience of explanation, in FIG. 7, the bobbin 63, the movable iron core 64, and the drive shaft 65 are not shown.

As shown in FIG. 7, the first divided core 81 and the second divided core 82 are arranged such that the first protruding portions 93 face each other and the second protruding portions 94 face each other. In this state, the first divided core 81 and the second divided core 82 are mirror-symmetrical.

That is, the first protruding portion 93 of the first divided core 81 and the first protruding portion 93 of the second divided core 82 face each other at an interval, and the second protruding portion 94 of the first divided core 81 and the second divided core The second protruding portions 94 of 82 face each other at intervals. The space surrounded by the first divided core 81 and the second divided core 82 is the inside space 68 described above. The drive shaft 65 protrudes to the outside of the fixed core 61 through a gap formed by the first protruding portion 93 of the first divided core 81 and the first protruding portion 93 of the second divided core 82.

In addition, the first connecting member 83 and the second connecting member 84 are configured such that the first protruding portions 93 face each other, and the second protruding portions 94 face each other. The magnetic plates 90 of the two connection members 84 are provided in directions different from the directions of the magnetic plates 90 constituting the first divided core 81 and the second divided core 82. Specifically, the first connecting member 83 is configured to rotate the X-axis in a direction overlapping the Z-axis from the direction of the magnetic plate 90 constituting the first divided core 81 along the XZ plane of the product layer of the magnetic plate 90. The direction after 90 degrees; the second connecting member 84 is a direction in which the X axis is rotated by 90 degrees along the XZ plane from the direction of the magnetic plate 90 constituting the second divided core 82.

Similarly, to connect the third connecting member 85 and the fourth The members 86 are arranged such that the first protrusions 93 face each other and the second protrusions 94 face each other, so that the magnetic plate 90 constituting the third connection member 85 and the fourth connection member 86 is formed to constitute the first division The cores 81 and the magnetic plates 90 of the second divided cores 82 have different directions.

The first connection member 83 and the second connection member 84 and the third connection member 85 and the fourth connection member 86 are opposed to each other via the first divided core 81 and the second divided core 82. Configuration.

With the arrangement as described above, the first magnetic plate 90 of the plurality of magnetic plates 90 laminated on each of the first divided core 81 and the second divided core 82 has the first magnetic plate 90 on which the first magnetic plate 90 is superposed. The state of the plate surfaces of the connection member 83 and the second connection member 84. In addition, on the plate surface of the lowermost magnetic plate 90 of each of the first divided core 81 and the second divided core 82, the plate surfaces of the third connecting member 85 and the fourth connecting member 86 are superimposed. .

Then, the first divided cores 81 and the second divided cores 82, and the first, second, and third connection members 83, 84, 85, and 85 are fixed using the connection bolts 87a to 87f and the nuts 88a to 88f.四 连接 机构 86。 Four connecting members 86. For example, the connection bolt 87a is passed through the connection hole 95a of the first connection member 83, the connection hole 95e of the first divided core 81, and the connection hole 95a of the third connection member 85, and is fixed with a nut 88a. The connecting bolts 87b to 87f are similarly passed through the corresponding connecting holes 95, and the nuts are locked with the nuts 88b to 88f. Thereby, the first divided core 81 and the second divided core 82 can be connected by the first connecting member 83, the second connecting member 84, the third connecting member 85, and the fourth connecting member 86.

In this way, by using a plurality of magnetic plates 91 having the same shape and different directions as the plurality of magnetic plates 90 laminated on the first connection member 83 and the second connection member 84, the first connection members 83 and Second connection member 84. For this reason, the type of the magnetic plate constituting the fixed iron core 61 can be set to one type, and the type of the parts constituting the fixed iron core 61 can be reduced compared with the case where plural types of magnetic plates are used.

Further, as shown in FIGS. 3, 4 and 7, the connecting holes 95a, 95a to 95f of the connecting holes 95a to 95f formed in the magnetic plate 90 constituting the first divided core 81 and the second divided core 82 are shown in FIG. 95e and 95f are used for fixing the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86. Further, the connection holes 95a and 95b are formed in the plurality of connection holes 95a to 95f of the magnetic plate 91 constituting the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86. , 95d, 95e are used for connection with the first divided core 81 and the second divided core 82.

As described above, the first divided core 81 and the second divided core 82 and the first connecting member 83, the second connecting member 84, the third connecting member 85, and the fourth connecting member 86 use the connecting hole 95a in common, whereby the connection hole 95a can be used. The number of connection holes 95 formed in the magnetic plates 90 and 91 is suppressed, and the reduction in the strength of the magnetic plates 90 and 91 can be suppressed. Furthermore, although the magnetic plates 90 and 91 described above have six connecting holes 95a to 95f, the number of the connecting holes 95 is not limited to six.

The first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 are as shown in FIG. 3, at least The end portions 831, 841, 851, and 861 are in the negative direction of the Y-axis orthogonal to the stacking direction of the magnetic plates 90 in the first divided core 81 and the second divided core 82 toward the first divided core 81 and the second divided The core 82 protrudes from the outer side, and connection holes 95e are arranged in the end portions 831, 841, 851, and 861. The end portions 831, 841, 851, and 861 are end portions 911 of the magnetic plate 91 shown in Fig. 6.

As shown in FIG. 4, the electromagnetic operation mechanism 60 connects the first divided core 81 and the first through the connection holes 95 a and 95 d which are shorter than the distance L1 between the connection holes 95 a and 95 e in the magnetic plate 91. Two-part iron core 82. For this reason, the end portions 831, 841, 851, and 861 can be made to protrude in the negative direction of the X axis than the first divided core 81 and the second divided core 82.

The connection holes 95e formed in the magnetic plate 90 constituting the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 are for fixing the electromagnetic operation mechanism 60 to the slave frame. The partition wall 3 of 1 is used as the support portion 4 and the support portion 5 protruding toward the second space portion 8 side. Because the distance L3 between the central axis O1 of the drive shaft 65 and the connection hole 95e of the magnetic plate 91 is not uniform, it does not depend on the thickness of the first divided core 81 and the second divided core 82, so the frame 1 can be suppressed. The position of the central axis O1 of the driving shaft 65 is not uniform. This point will be specifically described below.

Fig. 8 is a schematic diagram showing a state where the electromagnetic operation mechanism is fixed to a support portion protruding from the partition wall of the housing of the first embodiment. Although the support portions 4 and 5 are ribs protruding from the partition wall 3, for example, they may be metal members attached to the partition wall 3 such as L-shaped metal parts fixed to the partition wall 3.

As shown in FIG. 8, the first connection member 83 can be fixed to the frame body by the mounting screw 96 passing through the connection hole 95 e of the first connection member 83 and screwed to the screw hole formed in the support portion 4. 1. The second connection member 84 can be fixed to the frame body 1 by mounting screws 97 passing through the connection holes 95e of the second connection member 84 and being screwed to the screw holes formed in the support portion 5. The surface of the magnetic plate 91 constituting the first connection member 83 and the second connection member 84, that is, the surface in the lamination direction in the magnetic plate 91, refers to a fixed area fixed to the support portions 4, 5 and serves as a support The mounting surfaces on which the sections 4 and 5 are mounted are fixed to the support sections 4 and 5.

Similarly, a mounting screw (not shown) is passed through the connecting hole 95e of the third connecting member 85 and screwed to a screw hole formed on a rib (not shown), whereby the third connecting member 85 can be fixed to the frame. Body 1. In addition, a mounting screw (not shown) is passed through the connecting hole 95e of the fourth connecting member 86 and screwed to a screw hole formed on a rib (not shown), whereby the fourth connecting member 86 can be fixed to the frame. 1. In addition, although the example in which the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 are attached to the rib has been described, only the first connection member 83, Part of the second connection member 84, the third connection member 85, and the fourth connection member 86 is attached to the rib.

The unevenness in the distance L4 between the central axis O1 of the drive shaft 65 and the partition wall 3 is based on the outer shape of the first connecting member 83, the second connecting member 84, the third connecting member 85, and the fourth connecting member 86. The unevenness and the unevenness of the position of the connection hole 95e are determined. Therefore, even when the electromagnetic operation mechanism 60 has been enlarged, it is not affected by the first configuration. Influence of the number of stacked magnetic plates 90 of the divided core 81 and the second divided core 82.

For this reason, as compared with the case where the first divided core 81 and the second divided core 82 are fixed in the laminated direction of the magnetic plate 90, it is also possible to attach the partition wall 3 of the frame 1 to the center axis O1 of the drive shaft 65. The electromagnetic operation mechanism 60 is fixed in a state where there is less unevenness in position. Thereby, the positional relationship of the other components connected to the drive shaft 65 is relatively stable, and a stable input operation can be performed.

In addition, since the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 connected to the first divided core 81 and the second divided core 82 can be used, the electromagnetic operation mechanism 60 can be fixed. In the housing 1, there is no need for a member for fixing the electromagnetic operation mechanism 60 to the housing 1. For this reason, the number of parts in the circuit breaker 100 can be reduced.

The first divided core 81 and the second divided core 82 are connection holes that can be used to connect the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86. 95e, used for fixing with frame 1. For this reason, the number of connection holes 95 formed in the magnetic plates 90 and 91 can be suppressed, and the reduction in strength of the magnetic plates 90 and 91 can be suppressed.

As described above, the circuit breaker 100 according to the first embodiment includes the first fixed conductor 10 as an example of the fixed conductor, which has the fixed contact point 10a; the movable member 20, which has the movable contact point 20a; and the transmission portion 50, which has the drive shaft 65. And an electromagnetic operating machine that moves the drive shaft 65 linearly The movement of the structure 60 and the driving shaft 65 moves the movable member 20 to contact and isolate the fixed contact 10a and the movable contact 20a; and the frame 1 covers the electromagnetic operation mechanism 60 and the transmission portion 50. The electromagnetic operating mechanism 60 includes: a fixed iron core 61; a movable iron core 64 provided so as to be movable relative to the fixed iron core 61; an electromagnetic coil 62 fixed to the fixed iron core 61 to generate a magnetic flux to move the movable iron core 64; and The drive shaft 65 is connected to the movable core 64.

The fixed iron core 61 includes: a first divided iron core 81 and a second divided iron core 82, which are formed by laminating a plurality of magnetic plates 90 as an example of the first magnetic plate, and are formed in a positive direction with the plurality of magnetic plates 90. The first, second, and third connecting members 83, 84, 85, and 86 are used to connect the first divided core 81 and the second divided core 82. Each of the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 has the same shape as the magnetic plate 90 and has a connection in a direction different from that of the magnetic plate 90. The magnetic plate 91 as an example of the second magnetic plate is the first divided core 81 and the second divided core 82. The magnetic plate 91 constituting at least one of the first connecting member 83, the second connecting member 84, the third connecting member 85, and the fourth connecting member 86 has a fixed area, and the fixed area is connected to a plurality of magnetic plates. The direction in which the stacking direction of 90 is orthogonal is protruded to the outside of at least one of the first divided core 81 and the second divided core 82 and is fixed to the support portions 4 and 5 provided on the frame 1.

Thus, the positional unevenness of the central axis O1 of the drive shaft 65 The uniformity is determined by the unevenness of the outer shapes of the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86, and the unevenness of the positions of the connection holes 95e. Therefore, even when the electromagnetic operation mechanism 60 has been enlarged, it is not affected by the number of laminated magnetic plates 90 constituting the first divided core 81 and the second divided core 82. For this reason, as compared with the case where the first divided core 81 and the second divided core 82 are fixed in the laminated direction of the magnetic plate 90, it is possible to perform the electromagnetic operation with less unevenness in the position of the central axis O1 of the drive shaft 65 The operation mechanism 60 is fixed. Thereby, the positional relationship of the other components connected to the drive shaft 65 is relatively stable, and a stable input operation can be performed. In addition, since the magnetic plates 90 and 91 constituting the fixed core 61 have the same shape, the types of components constituting the fixed core 61 can be reduced.

The magnetic plate 91 is fixed to the support portions 4 and 5 by using the surface of the end portion 911 in the lamination direction of the magnetic plate 90 as a mounting surface to which the support portion 4 and the support portion 5 are attached. Thereby, the magnetic plate 91 can be fixed to the support portions 4 and 5 by surface contact, and the mounting of the electromagnetic operation mechanism 60 to the frame body 1 can be performed stably. Furthermore, instead of the surface of the end portion 911, the side surface of the end portion 911 may be used as a fixed area fixed to the support portion 4 and the support portion 5.

The moving direction of the movable iron core 64 is a direction orthogonal to the laminated direction of the magnetic plate 90. The end portion 911 of the magnetic plate 91 is in a direction orthogonal to the lamination direction of the magnetic plate 90 and the moving direction of the movable core 64, respectively, to the outside of at least one of the first divided core 81 and the second divided core 82. protruding. Therefore, the movable iron core can be suppressed. The length of the fixed core 61 in the moving direction of 64 and the length of the electromagnetic operation mechanism 60 other than the drive shaft 65 can be suppressed in the moving direction of the movable core 64.

Further, the magnetic plate 90 and the magnetic plate 91 are formed with a plurality of connection holes 95a to 95f, and an end portion 911 is formed with a connection hole 95e of the plurality of connection holes 95a to 95f. Thereby, a locking connector such as a bolt can be attached to the connection hole 95e formed in the end portion 911 of the magnetic plate 91, and the end portion 911 can be easily fixed to the support portions 4 and 5.

One or more connecting holes 95e of the plurality of connecting holes 95a to 95f are selectively used to connect the magnetic plate 91 to the magnetic plate 90 of the first divided core 81 and the second divided core 82, and to connect magnetically The plate 91 is fixed to the support portion 4 and the support portion 5. Thereby, the number of the connection holes 95 formed in the magnetic plates 90 and 91 can be suppressed, and the reduction in the strength of the magnetic plates 90 and 91 can be suppressed.

[Embodiment 2]

In the first embodiment, it has been described that a part of the first connection member 83, the second connection member 84, the third connection member 85, and the fourth connection member 86 protrudes in a direction orthogonal to the central axis O1 of the drive shaft 65. An example in which the support portions 4 and 5 are fixed to the frame body 1. However, the second embodiment differs from the first embodiment in that the first connection member 83, the second connection member 84, and the third connection member 85 are different. A part of the fourth connecting member 86 is protruded in a direction along the central axis O1 of the drive shaft 65 and is fixed to the support portions 4 and 5 of the housing 1.

Hereinafter, constituent elements having the same functions as those of the first embodiment will be denoted by the same reference numerals, and descriptions thereof will be omitted. The differences from the electromagnetic operating mechanism 60 of the first embodiment will be mainly described. The members having the same functions as those of the electromagnetic operating mechanism 60 according to the first embodiment will be described by using a character with an "A" added to the same number as that of the first embodiment.

FIG. 9 is a schematic diagram showing a configuration example of a magnetic plate constituting a fixed core of an electromagnetic operating mechanism according to the second embodiment, and FIG. 10 is a plan view of the electromagnetic operating mechanism according to the second embodiment. In FIG. 9, the upward direction is defined as the positive Z-axis direction, the downward direction is defined as the negative Z-axis direction, and the right direction is defined as the positive X-axis direction.

The electromagnetic operating mechanism 60A according to the second embodiment uses magnetic plates 90A and 91A having shapes different from those of the magnetic plates 90 and 91 according to the first embodiment. As shown in FIG. 9, the magnetic plates 90A and 91A have the same shape as each other, similarly to the magnetic plates 90 and 91. The magnetic plates 90A and 91A include: an extending portion 92A that extends in the up-down direction; a first protruding portion 93A that projects from the upper portion of the extending portion 92A to the right; and a second protruding portion 94A that extends from the extending portion 92A. The lower part protrudes to the right. Then, connecting holes 98a to 98f are formed in the extended portion 92A, and connecting holes 98g are formed in the first protruding portion 93A. In addition, in the following, the connection holes 98a to 98g may be collectively referred to as the connection holes 98 in some cases.

As shown in FIG. 10, the fixed core 61a includes a first divided core 81A and a second divided core 82A, and a first connection member 83A, a second connection member 84A, a third connection member 85A, and a fourth connection. The member 86A is fixed to the first divided core 81A and the second divided core 82A by the first connecting member 83A, the second connecting member 84A, the third connecting member 85A, and the fourth connecting member 86A by connecting bolts 87a to 87f. . The first divided core 81A and the second divided core 82A are constituted by a magnetic plate 90A; the first connecting member 83A, the second connecting member 84A, the third connecting member 85A, and the fourth connecting member 86A are magnetically formed. Plate 91A. Moreover, in FIG. 10, the third connection member 85A and the fourth connection member 86A are shielded by the first connection member 83A and the second connection member 84A, and are not shown.

In the example shown in FIG. 10, the connection holes 98a, 98e, and 98g of the connection holes 98a to 98g of the magnetic plate 90A are used for connection with the first connection member 83A, the second connection member 84A, and the third connection member. The fixing of 85A and the fourth connecting member 86A. The connection holes 98b, 98c, 98d, and 98f formed in the plurality of connection holes 98a to 98g of the magnetic plate 91A are used for connection to the first divided core 81A and the second divided core 82A. Furthermore, although the magnetic plates 90A and 91A have seven connecting holes 98, the number of the connecting holes 98 is not limited to the number shown in FIG. 9 as in the case of the magnetic plates 90 and 91.

The first connection member 83A and the second connection member 84A are as shown in FIG. 10, and at least the end portions 832A and 842A are in the direction of lamination of the magnetic plate 90A belonging to the first divided core 81A and the second divided core 82A. In the vertical direction of the orthogonal direction, it protrudes further outward than the first divided core 81A and the second divided core 82A. Although not shown, the ends of the third connection member 85A and the fourth connection member 86A are also the same. The bottom part protrudes upward to the outside of the first divided core 81A and the second divided core 82A. The end portions 832A and 842A are end portions 912A of the magnetic plate 91A shown in FIG. 9.

The connection holes 98a and 98e formed in the magnetic plate 90A constituting the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A are formed to fix the electromagnetic operation mechanism 60A to the slave frame. The supporting portions 4 and 5 protruding from the partition wall 3 of the body 1 are used. FIG. 11 is a schematic diagram showing a state where the electromagnetic operation mechanism is fixed to a support portion protruding from the partition wall of the casing of the second embodiment.

As shown in FIG. 11, the first connection member 83A can be fixed to the frame by screwing the mounting screw 96 through the connection hole 98e of the first connection member 83A to the screw hole formed in the support portion 4. Body 1. In addition, the second connecting member 84A can be fixed to the frame 1 by screwing the mounting screw 97 through the connecting hole 98e of the second connecting member 84A and screwing the mounting screw 97 to the support portion 5. Similarly, the third connection member 85A and the fourth connection member 86A can be fixed to the support portions 4 and 5 by mounting screws (not shown). The surface of the magnetic plate 91A constituting the first connection member 83A, the second connection member 84, the third connection member 85A, and the fourth connection member 86A, that is, the surface in the lamination direction in the magnetic plate 91A, serves as the supporting portion 4 , 5 are mounted on the mounting surface to be fixed to the support portions 4 and 5.

The unevenness in the distance L5 between the central axis O1 of the drive shaft 65 and the partition wall 3 is based on the shape of the outer shape of the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A. The unevenness and the unevenness of the positions of the connection holes 98e are determined. thereby, Even when the electromagnetic operating mechanism 60A is enlarged, it is not affected by the number of laminated magnetic plates 90A constituting the first divided core 81A and the second divided core 82A.

Furthermore, although the example in which the electromagnetic operation mechanism 60A is fixed to the housing 1 using the connection holes 98e of the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A has been described, A configuration in which the electromagnetic operation mechanism 60A is fixed to the housing 1 using only a part of the connection holes 98e of the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A may be employed. . In addition, the electromagnetic operation mechanism 60A may be fixed to the housing 1 by using all of the connection holes 98e of the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A.

In the example described above, although the first connecting member 83A, the second connecting member 84A, the third connecting member 85A, and the fourth connecting member 86A are made smaller than the first divided core 81A and the second divided core 82A protrudes further upward or downward, but it is not necessary to protrude the connecting members of one of the first connecting member 83A, the second connecting member 84A, the third connecting member 85A, and the fourth connecting member 86A upward or downward. For example, as shown in FIG. 12, the second connection member 84A and the fourth connection member 86A may be fixed to the first divided core so that the second connection member 84A and the fourth connection member 86A do not protrude upward or downward. 81A and the second divided core 82A. Fig. 12 is a plan view of an electromagnetic operation mechanism having another configuration of the second embodiment.

As described above, in the electromagnetic operating mechanism 60A of the second embodiment Among them, the end portion 91A of the magnetic plate 91A constituting at least one of the first connection member 83A, the second connection member 84A, the third connection member 85A, and the fourth connection member 86A has a fixed area, and the fixed area is In a direction orthogonal to the stacking direction of the plurality of magnetic plates 90A in the first divided core 81A and the second divided core 82A, it protrudes to the outside of at least one of the divided cores 81 and the second divided core 82, And it is fixed to the support parts 4 and 5 provided in the frame 1. The protruding direction of the end portion 912A of the magnetic plate 91A is the moving direction of the movable core 64. Therefore, in the width direction which is a direction orthogonal to the moving direction of the movable iron core 64 and the lamination direction of the magnetic plate 90A, the length of the fixed iron core 61A can be suppressed, and in the width direction, the length of the electromagnetic operating mechanism 60A can be suppressed.

Furthermore, in the example described above, although the examples in which the protruding portions 911 and 912A of the magnetic plates 91 and 91A are fixed to the support portions 4 and 5 have been described, only the protruding portions of the magnetic plates 91 and 91A are required. It may be fixed to the support portions 4 and 5, and is not limited to an example in which the end portions 911 and 912A are fixed to the support portions 4 and 5.

In the example described above, although the example of the input operation by the electromagnetic operation mechanism 60, 60A has been described, the electromagnetic operation mechanism 60, 60A can be configured to perform a trip operation and a trip in addition to the input operation. At least one side of the state. In this case, in addition to the electromagnetic coil 62 for operation, an additional electromagnetic coil for moving the drive shaft 65 downward may be fixed to the fixed cores 61 and 61A, and an exciting current may flow to the additional electromagnetic coil. To perform at least one of a trip operation and maintenance of a trip state.

The configuration shown in the above embodiment is an example showing the content of the present invention, and it can be combined with other known technologies, and a part of the configuration can be omitted or changed without departing from the gist of the present invention.

Claims (7)

An electromagnetic operating mechanism, comprising: a fixed iron core; a movable iron core provided to be movable relative to the fixed iron core; an electromagnetic coil fixed to the fixed iron core to generate a magnetic flux to move the movable iron core; And the drive shaft are connected to the movable iron core; the fixed iron core includes: a first divided iron core and a second divided iron core, each of which is formed by laminating a plurality of first magnetic plates, and is connected with the plurality of first magnetic plates; The directions in which the lamination directions are orthogonal are opposed to each other; and a plurality of connecting members for connecting the first divided core and the second divided core; each of the plurality of the connecting members is constituted by a second magnetic plate, The second magnetic plate has the same shape as the first magnetic plate, and connects the first divided core and the second divided core in a different direction from the first magnetic plate; and constitutes at least one of the plurality of connecting members. The aforementioned second magnetic plate has a fixed region in a direction orthogonal to the lamination direction, The first and the second split cores of the split cores of the at least one protruding outward, and fixed to the supporting portion of the frame body breaker provided. The electromagnetic operating mechanism according to item 1 of the scope of patent application, wherein the fixed area is fixed to the support portion by using the surface in the lamination direction as a mounting surface to be mounted on the support portion. The electromagnetic operating mechanism according to item 1 or item 2 of the scope of patent application, wherein the moving direction of the movable iron core is a direction orthogonal to the lamination direction; the fixed area of the second magnetic plate is connected with the The directions in which the lamination direction and the moving direction of the movable core are orthogonal to each other protrude to the outside of at least one of the first divided core and the second divided core, respectively. The electromagnetic operating mechanism according to item 1 or item 2 of the patent application scope, wherein the fixed area of the second magnetic plate is in the moving direction of the movable core toward the first divided core and the second divided At least one of the cores protrudes outside. The electromagnetic operating mechanism according to item 1 or item 2 of the scope of patent application, wherein the first magnetic plate and the second magnetic plate are respectively formed with a plurality of connection holes; at least one of the plurality of connection holes is formed. One line is formed in the aforementioned fixed area. The electromagnetic operating mechanism according to item 5 of the scope of patent application, wherein at least one of the plurality of connection holes is selectively used to connect the second magnetic plate to the first divided core and the second The first magnetic plate for dividing the core, and the second magnetic plate for fixing the support to the support. A circuit breaker includes: a fixed conductor having a fixed contact; a movable member having a movable contact; an electromagnetic operating mechanism having a shaft that linearly moves the shaft; and a transmission unit accompanying the foregoing The movement of the shaft moves the movable member to contact and isolate the fixed contact point from the movable contact point; and a frame body to cover the electromagnetic operation mechanism and the transmission portion; the electromagnetic operation mechanism includes: fixed A core; a movable core provided to be movable relative to the fixed core; an electromagnetic coil fixed to the fixed core to generate magnetic flux to move the movable core; and a drive shaft connected to the movable core; The fixed iron core includes: a first divided iron core and a second divided iron core, each of which is formed by laminating a plurality of first magnetic plates and faces each other in a direction orthogonal to the lamination direction of the plurality of first magnetic plates. ; And a plurality of connecting members for connecting the first divided core and the second divided core; Each of the pieces is constituted by a second magnetic plate having the same shape as the first magnetic plate and connecting the first divided core and the second magnetic plate in a direction different from the first magnetic plate. The divided core; the second magnetic plate constituting at least one of the plurality of connecting members has a fixed area, the fixed area is in a direction orthogonal to the lamination direction toward the first divided core and the second divided core The outer side of at least one of them protrudes and is fixed to a support portion provided on the frame of the circuit breaker.