WO2019021385A1

WO2019021385A1 - Breaker

Info

Publication number: WO2019021385A1
Application number: PCT/JP2017/027034
Authority: WO
Inventors: 智也出口; 雄大相良; 聡介内野; 説志岩下
Original assignee: 三菱電機株式会社
Priority date: 2017-07-26
Filing date: 2017-07-26
Publication date: 2019-01-31
Also published as: JP6661058B2; JPWO2019021385A1; CN111095467A; TWI651746B; TW201911357A; CN111095467B

Abstract

A breaker (1) comprises: a transmission unit that performs contact and separation between a fixed contact point and a movable contact point by causing a moveable element to move along with the rotation of a rotating member (62); an electromagnetic operation mechanism part (70) that moves a shaft (74) in a linear manner; a linking part (80) that links the transmission unit and the shaft (74), and causes the rotating member (62) to rotate along with the movement of the shaft (74); and a frame (91) that, with the shaft (74) inclined in a first direction with respect to the movement direction by the force of a biasing member (92), covers at least a portion of a linking pin (81) of the linking part (80) linked to the shaft (74), and at least a portion of the linking pin (81) opposing in the axial direction of the rotating member (62). The frame (91) comprises an opening (97) at a position for which the entire linking pin (81) is exposed seen from the axial direction of the rotating member (62), with the shaft (74) inclined in a second direction that is the reverse direction to the first direction with respect to the movement direction.

Description

Circuit breaker

The present invention relates to a circuit breaker having a fixed contact and a movable contact, and provided with an electromagnetic operation mechanism for closing operation to bring the movable contact into contact with the fixed contact or for tripping operation to separate the movable contact from the fixed contact.

2. Description of the Related Art Conventionally, as a circuit breaker that opens and closes an electric path, a spring-operated circuit breaker and an electromagnetically operated circuit breaker are known. As described in Patent Document 1, the spring-operated type circuit breaker performs closing operation and tripping operation of the movable contact using energy released when the force of the stored spring is released. .

Further, as disclosed in Patent Document 2, the electromagnetic operation type circuit breaker includes an electromagnetic operation mechanism unit connected to a movable contact facing the fixed contact via a transmission unit, and the circuit breaker from the electromagnetic operation mechanism unit The driving force is transmitted to the transmission unit to perform the closing operation and the tripping operation of the movable contact.

Japanese Patent Application Laid-Open No. 6-89650 JP 2008-159270 A

Circuit breakers are generally used as main circuit breakers in buildings, factories, etc., and in the event of failure, recovery in a short time is required. Therefore, although the whole of the failed circuit breaker may be replaced, if there is no space for placing a spare circuit breaker and there is no replacement circuit breaker, the energization will stop for a long time. Therefore, only the failed part in the circuit breaker may be replaced and repaired.

The spring-operated type circuit breaker utilizes a spring with a large load in the closing operation, and since the circuit breaker is always in a state of being subjected to a large load, it is not easy to replace parts in the circuit breaker.

The electromagnetically operated breaker utilizes the energy of the electromagnetic coil, so there is no closing spring like a spring operated breaker. However, for example, when the electromagnetic operation mechanism is damaged, there is a connecting portion in the frame that connects the electromagnetic operation mechanism with the transmission portion, and it is difficult to separate the electromagnetic operation mechanism and the transmission portion. Or, it was not easy to replace parts related to the electromagnetic operation mechanism.

This invention is made in view of the above, Comprising: It aims at obtaining the circuit breaker which can perform easily the replacement operation of the part relevant to an electromagnetic control mechanism part or an electromagnetic control mechanism part.

In order to solve the problems described above and achieve the object, the circuit breaker of the present invention comprises a stator having a fixed contact, a mover having a movable contact, a transmission unit, an electromagnetic operation mechanism unit, and a connection unit. , A biasing member, and a frame. The transmission unit has a rotating member, moves the mover as the rotating member rotates, and makes contact and separation between the fixed contact and the movable contact. The electromagnetic operation mechanism has a shaft and moves the shaft linearly. The connecting portion connects the transmitting portion and the shaft, and rotates the rotating member in accordance with the movement of the shaft. The biasing member applies a force to the rotating member in the direction of rotation that isolates the movable contact from the fixed contact. The frame is in the axial direction of the rotating member and at least a portion of the connecting pin connected to the shaft in the connecting portion in a state where the shaft is inclined in the first direction with respect to the moving direction of the shaft by the force of the biasing member. Oppositely, at least a part of the connecting pin is covered. The frame has an opening at a position where the entire connecting pin is exposed when viewed from the axial direction of the rotating member, with the shaft inclined in a second direction opposite to the first direction with respect to the moving direction. .

According to the present invention, it is possible to easily carry out the replacement operation of the electromagnetic operation mechanism or the portion related to the electromagnetic operation mechanism.

FIG. 2 is a diagram showing a configuration example of a circuit breaker according to a first embodiment. FIG. 2 is a diagram showing a configuration inside a case of a circuit breaker according to a first embodiment. The figure which expanded the upper part of the electromagnetic operation mechanism part concerning Embodiment 1 An enlarged view of the electromagnetic operation mechanism unit, the connection unit, and the machine operation mechanism unit according to the first embodiment The figure which shows the completion state of closing of the circuit breaker concerning Embodiment 1. Explanatory drawing about the method to replace | exchange the electromagnetic control mechanism part or the machine control mechanism part concerning Embodiment 1. FIG. 8 is a view showing another example of the configuration for restricting the downward movement of the drive shaft according to the first embodiment. FIG. 8 is a view showing another example of the configuration for restricting the downward movement of the drive shaft according to the first embodiment. Explanatory drawing about the method to replace | exchange the electromagnetic control mechanism part or the machine control mechanism part concerning Embodiment 1. Explanatory drawing about the method to replace | exchange the electromagnetic control mechanism part or the machine control mechanism part concerning Embodiment 1. Side view showing the relationship among the frame, the connection pin, the connection link, and the bearing according to the first embodiment Explanatory drawing about the method to replace | exchange the electromagnetic control mechanism part or the machine control mechanism part concerning Embodiment 1.

Below, the circuit breaker concerning the embodiment of the present invention is explained in detail based on a drawing. The present invention is not limited by the embodiment.

Embodiment 1
FIG. 1 is a view showing a configuration example of a circuit breaker according to a first embodiment. The circuit breaker according to the first embodiment is, for example, a circuit breaker that opens and closes an electric path such as a low voltage distribution line. In the following, for convenience of explanation, the positive direction of Z-axis is upward, the negative direction of Z-axis is downward, the positive direction of X-axis is rightward, the negative direction of X-axis is left direction, and the positive direction of Y-axis Is the front direction, and the Y axis negative direction is the rear direction.

As shown in FIG. 1, the circuit breaker 1 according to the first embodiment includes a housing 2 formed of an insulating member, a power supply side fixed conductor 10 connected to a power supply side conductor (not shown), and a load (not shown) A load-side fixed conductor 20 connected to the side conductor, a mover 30 having a movable contact 30 a, and a flexible conductor 40 having a flexibility by electrically connecting the load-side fixed conductor 20 and the mover 30 Prepare.

Inside the housing 2,

space portions

4 and 5 separated by the insulating wall 3 are formed. The power supply side fixed conductor 10 extends from the outside of the housing 2 to the space 4 and penetrates the wall 6 of the housing 2. One end portion 101 of the power supply side fixed conductor 10 protrudes to the outside and is connected to a power supply side conductor (not shown), the other end portion 102 of the power supply side fixed conductor 10 is disposed in the space 4 and the fixed contact 10a is fixed. Ru.

Similar to the power supply side fixed conductor 10, the load side fixed conductor 20 extends from the outside of the case 2 to the space 4 and penetrates the wall 6 of the case 2. One end portion 201 of the load side fixed conductor 20 protrudes to the outside and is connected to a load side conductor (not shown), and the other end portion 202 of the load side fixed conductor 20 is disposed in the space portion 4.

A movable contact 30 a is provided at one end 301 of the mover 30, and the other end 302 of the mover 30 is fixed to one end 401 of the flexible conductor 40. The other end 402 of the flexible conductor 40 is fixed to the other end 202 of the load side fixed conductor 20.

Further, the circuit breaker 1 is a holder 50 rotatably attached to the other end 202 of the load side fixed conductor 20, a contact pressure spring 51 held by the holder 50, and a movable rotatably held by the holder 50. And a child pin 52. The contact pressure spring 51 urges the mover 30 to rotate clockwise about the mover pin 52, and when the moveable contact 30a provided on the mover 30 is connected to the fixed contact 10a, the fixed contact is made. A contact pressure is applied between 10a and the movable contact 30a.

The circuit breaker 1 includes a transmission unit 60 connected to the mover 30, an electromagnetic operation mechanism unit 70 moving the mover 30 via the transmission unit 60, and a connection connecting the transmission unit 60 and the electromagnetic operation mechanism unit 70. And a machine operation mechanism unit 90 for maintaining the closing completion state of the circuit breaker 1 and releasing the closing completion state. The transmission unit 60 is disposed across the space 4 and the space 5, and the electromagnetic operation mechanism 70, the coupling unit 80, and the machine operation mechanism 90 are disposed in the space 5. Further, in the space portion 5, the mounting table 7 at least a part of which is located below the electromagnetic operation mechanism portion 70 and fixed to the housing 2 is disposed. The mounting table 7 is configured of, for example, a shelf, a frame, or a case.

Here, the closed state is a state in which the fixed contact 10a and the movable contact 30a are in contact, and the closing operation or closing operation is an operation or operation of moving the movable contact 30a to contact the fixed contact 10a. Show. The tripping operation or tripping operation indicates the motion or operation of moving the movable contact 30a away from the fixed contact 10a.

FIG. 2 is a view showing the configuration in the case 2 of the circuit breaker 1 according to the first embodiment, and FIG. 3 is an enlarged view of the upper portion of the electromagnetic operation mechanism unit 70 shown in FIG. These are the enlarged views of the electromagnetic operation mechanism part 70, the connection part 80, and the machine operation mechanism part 90 shown in FIG.

As shown in FIG. 2, the transmission unit 60 has an operation arm 61 whose one end 611 is rotatably coupled to the mover 30 by the mover pin 52, and one end 621 is linked to the other end 612 of the operation arm 61. A connecting plate 62, which is an example of a rotating member rotatably connected by a pin 63, and a shaft 64 fixed to a central portion of the connecting plate 62 and rotating around an axial center 65 are provided.

The electromagnetic operation mechanism 70 is disposed below the connection plate 62. The electromagnetic operation mechanism unit 70 and the insulating wall 3 are fixed by a fixing unit (not shown).

As shown in FIG. 2, the electromagnetic operation mechanism unit 70 includes a yoke 71 formed of a magnetic material, a coil 72 fixed inside the yoke 71, and a movable iron core 73 capable of reciprocating in the vertical direction. A drive shaft 74 fixed to the movable iron core 73, and a bearing portion 75 that guides the drive shaft 74 so as to reciprocate linearly in the vertical direction. The drive shaft 74 reciprocates in the vertical direction at a position spaced apart from the axial center 65 in the left direction. The movable iron core 73 and the drive shaft 74 may be fixed, and the method of fixing the movable iron core 73 and the drive shaft 74 is not limited.

As shown in FIG. 3, the drive shaft 74 is disposed on the inner side of the yoke 71 and the inner side of the bearing portion 75 via the gap 76. The drive shaft 74 vertically moves the inside of the yoke 71 and the bearing portion 75 in a state where the gap 76 is maintained constant by energization of the coil 72.

The connection part 80 which connects the transmission part 60 and the electromagnetic operation mechanism part 70 is provided with the

connection pin

81,82 and the connection link 83, as shown in FIG. One of the connection holes 84 of the connection link 83 is pivoted by a connection pin 81 in a connection hole 77 shown in FIG. The other connection hole 85 of the connection link 83 is pivoted by a connection pin 82 in a connection hole (not shown) formed in the middle of the connection plate 62.

As shown in FIG. 4, the machine operation mechanism unit 90 is rotatable on a frame 91 fixed to the housing 2, an opening spring 92 installed between the frame 91 and the connection plate 62, and the frame 91. It has a pivotally supported trip bar 93 and a latch 94 formed in an L shape.

The frame 91 is connected to the insulating wall 3 by a fixing member (not shown). The fixing member for fixing the frame 91 to the insulating wall 3 is, for example, a fixing means such as caulking of a pin. The frame 91 faces a part of the transmission part 60 and at least a part of the connection part 80 when viewed from the extension direction of the axial center 65 which is the axial direction of the connection plate 62, and a part of the transmission part 60 and the connection part 80 Cover at least a part. In the state shown in FIG. 4, the wall portion 91 a on the rear side of the frame 91 is shown, but the frame 91 is at least a part of the transmission portion 60 and at least the connecting portion 80 similarly to the wall portion 91 a on the rear side. A wall covering a part is also provided on the front side.

The frame 91 is provided with an opening 97 for the operator to release the connection between the transmission unit 60 and the electromagnetic operation mechanism unit 70. An opening 97 shown in FIG. 4 is formed in the vicinity of the connection pin 81 so that the connection pin 81 can be removed without removing the frame 91 from the housing 2. The relationship between the opening 97 and the connection pin 81 will be described in detail later.

One end 921 of the opening spring 92 is held by the connecting pin 95, and the connecting pin 95 is inserted into a connecting hole (not shown) formed in the connecting plate 62. Further, the other end 922 of the opening spring 92 is held by the connection pin 96, and the connection pin 96 is inserted into a connection hole (not shown) formed in the frame 91. As a result, the opening spring 92 is bridged between the frame 91 and the connection plate 62.

In the state where the opening spring 92 is installed between the frame 91 and the connection plate 62, the opening spring 92 is energized when the connection plate 62 is rotated clockwise about the shaft center 65 of the shaft 64. Is a tension spring to be accumulated. The opening spring 92 applies a force to the connection plate 62 in a counterclockwise direction about the axis 65.

A shaft 99 extending in the front-rear direction is fixed to a bent portion of the trip bar 93, and the shaft 99 is rotatably inserted into a not-shown rotation hole provided in the frame 91. As shown in FIG. 4, the latch 94 has a semicircular portion 98 formed in a semicircular shape, and as will be described later, the semicircular portion of the latch 94 when the circuit breaker 1 is in the closing completion state. The trip bar 93 is locked by the arc portion 98.

In the state shown in FIG. 1, the fixed contact 10 a and the movable contact 30 a are separated, and the circuit breaker 1 is in the tripped state. The operation of the circuit breaker 1 when the closing operation is performed from the state shown in FIG. 1 will be described. FIG. 5 is a view showing the circuit breaker 1 in the case where the closing is completed.

When the movable core 73 is moved upward by energization of the coil 72 of the electromagnetic operation mechanism 70 from the detached state shown in FIG. 1, the movable core 73 is fixed to the movable core 73 along with the upward movement of the movable core 73. The drive shaft 74 also moves upward.

When the drive shaft 74 moves upward, the connection plate 62 connected to the drive shaft 74 by the connection unit 80 is driven via the connection unit 80 to rotate clockwise about the axis 65. By rotating the shaft 64 in the clockwise direction, as shown in FIG. 5, the connection plate 62 and the operation arm 61 are driven, and the connection plate 62 and the operation arm 61 are linearly arranged.

As a result, the mover 30 moves in the right direction, and the movable contact 30a contacts the fixed contact 10a. Then, a contact pressure is applied between the fixed contact 10a and the movable contact 30a by the contact pressure spring 51, and the closing completion state is maintained. In the power-on completion state, the power supply side fixed conductor 10 is electrically connected to the load side fixed conductor 20 via the fixed contact 10 a, the movable contact 30 a, the mover 30, and the flexible conductor 40.

In addition, when the connection plate 62 rotates in the clockwise direction about the axial center 65, the engagement portion 66 of the connection plate 62 moves the latch 94 in the counterclockwise direction. Then, the latch 94 is engaged with the semicircular portion 98 of the trip bar 93, and the latch 94 is held by the trip bar 93 at the insertion completion position. The latch 94 and the trip bar 93 are biased by a spring force so as to perform a mechanical opening operation.

The operation of the circuit breaker 1 in the case where the tripping operation for moving the movable contact 30a away from the fixed contact 10a is performed from the closing completion state shown in FIG. 5 will be described. In the insertion completion state shown in FIG. 5, the open spring 92 is stored, and is in a state of applying a force in a direction to rotate the connection plate 62 counterclockwise around the axis 65 of the shaft 64. .

When the tripping bar 93 rotates clockwise, the tripping bar 93 and the latch 94 are disengaged. Therefore, the connection plate 62 is rotated counterclockwise by the opening spring 92, and the other end 612 of the operation arm 61 is moved upward as the connection plate 62 rotates counterclockwise.

When the other end 612 of the operation arm 61 moves upward, the one end 611 of the operation arm 61 moves in the left direction. Therefore, the mover 30 moves in the left direction, and the movable contact 30a separates from the fixed contact 10a. As a result, in the circuit breaker 1, the electric path including the power supply side fixed conductor 10 and the load side fixed conductor 20 is cut off.

Next, a method of replacing the electromagnetic operation mechanism unit 70 or the machine operation mechanism unit 90 will be described. 6, 9, 10 and 12 are explanatory views of a method of replacing the electromagnetic operating mechanism 70 or the mechanical operating mechanism 90, and FIGS. 7 and 8 show the downward movement of the drive shaft 74. FIG. 11 is a side view showing the relationship between the frame 91, the connecting pin 81, the connecting link 83, and the bearing portion 75. As shown in FIG.

When the circuit breaker 1 is completely inserted, as shown in FIG. 5, the engagement portion 66 formed at the other end 622 of the connection plate 62 is engaged with the trip bar 93, and the trip bar 93 is latched The rotation is restricted by 94. Therefore, even when no current is supplied to the coil 72 of the electromagnetic operation mechanism unit 70, the closing completion state shown in FIG. 5 is maintained.

When the drive shaft 74 is not driven by the electromagnetic operation mechanism 70, as shown in FIG. 6, the locking block 78 is temporarily installed below the drive shaft 74 and locked to the movable iron core 73. By contacting the block 78, the downward movement of the drive shaft 74 is restricted. Then, in a state where the downward movement of the drive shaft 74 is restricted, the trip bar 93 and the latch 94 are disengaged.

When a counterclockwise force is applied to the connection plate 62 in a state where the drive shaft 74 is not driven by the electromagnetic operation mechanism 70, the drive shaft 74 moves up and down, which is the moving direction of the drive shaft 74, via the connection 80. Force works in the direction crossing the direction. Since a gap 76 is formed between the drive shaft 74 and the bearing portion 75 as shown in FIG. 3, when the left side of the drive shaft 74 is pressed against the bearing portion 75, the drive shaft 74 is vertically It will be inclined to the left with respect to it.

Here, the installation of the locking block 78 described above is performed by the operator placing the locking block 78 on the mounting table 7, but blocking so that the locking block 78 is disposed below the movable iron core 73 The arrangement of the locking block 78 is not limited to the above-described example as long as the container 1 is configured.

For example, the circuit breaker 1 may be configured to automatically arrange the locking block 78 so as to be arranged below the movable core 73. Specifically, as shown in FIG. 7, the circuit breaker 1 may be configured to have an elevation mechanism 79 that raises and lowers the locking block 78. In this case, the elevating mechanism 79 moves the locking block 78 upward when the operation button (not shown) is operated by the operator, and restricts the downward movement of the drive shaft 74. The elevating mechanism 79 may be configured to move the locking block 78 upward only when the coil 72 of the electromagnetic operation mechanism 70 is not energized.

Further, the circuit breaker 1 moves the locking block 78 below the movable iron core 73 by moving the locking block 78 in the lateral direction or the vertical direction, instead of the elevating mechanism 79, so as to lower the drive shaft 74. It may be configured to regulate the movement of

Further, in the above-described example, the downward movement of the drive shaft 74 is restricted by the locking block 78, but the downward movement of the drive shaft 74 is restricted by another locking member instead of the locking block 78. It is also good. For example, in the electromagnetic operation mechanism unit 70 shown in FIG. 8, the yoke 71 is provided with the plurality of through holes 8, and the locking member 9 is inserted into the plurality of through holes 8. In this state, the vertical movement of the locking member 9 is restricted, and the drive shaft 74 is positioned above the locking member 9. Therefore, as shown in FIG. 8, the movable iron core 73 contacts the locking member 9 and the downward movement of the drive shaft 74 is restricted by the locking member 9.

In the example shown in FIG. 8, the through hole 8 is provided in the yoke 71. However, a member having the through hole 8 is fixed to the lower side of the yoke 71 shown in FIG. Similarly to the example shown in FIG. 8, the downward movement of the drive shaft 74 may be restricted by inserting the locking member 9 in 8.

As shown in FIG. 9, when the left side of the drive shaft 74 is pressed against the bearing portion 75, the Y axis in which only a part of the connection pin 81 is in the axial direction of the connection plate 62 from the opening 97 formed in the frame 91 It is in the state of being exposed seeing from the direction. In the state shown in FIG. 9, by pressing the drive shaft 74 in the right direction with a tool or hand, as shown in FIG. 10, the drive shaft 74 receives the right side from the state where the left side is pressed by the bearing 75 It will be in the state pressed by the part 75.

In the state shown in FIG. 10, the right side of the drive shaft 74 is pressed against the bearing portion 75, and the drive shaft 74 is inclined rightward with respect to the vertical direction, and the connection pin is formed from the opening 97 formed in the frame 91. The entire surface 81 is exposed when viewed in the axial direction of the connection plate 62. Therefore, the connection pin 81 can be easily removed from the circuit breaker 1 by pulling or pressing the connection pin 81 in the Y-axis direction, which is the front-rear direction, with a tool or a hand.

Then, by removing the connection pin 81, the transmission unit 60 and the electromagnetic operation mechanism unit 70 can be separated, and the electromagnetic operation mechanism unit 70 can be safely replaced. Further, since the transmission unit 60 and the electromagnetic operation mechanism unit 70 can be separated, the force from the electromagnetic operation mechanism unit 70 does not act on the machine operation mechanism unit 90. The parts related to the operating mechanism 70 can also be replaced safely.

In addition, when the circuit breaker 1 is in the tripped state, as shown in FIG. 4, only a part of the connection pin 81 is exposed from the opening 97 when the circuit breaker 1 is in the tripped state, as shown in FIG. It is in the state of Then, in the state where the current is supplied to the coil 72, the electromagnetic operation mechanism unit 70 keeps the drive shaft 74 extended in the vertical direction.

Therefore, during the period from the tripped state shown in FIG. 4 to the closing completion state shown in FIG. It moves up and down while only a part of 81 is exposed.

That is, in the circuit breaker 1, all of the connection pins 81 are not exposed from the openings 97 when viewed from the axial direction of the connection plate 62 until the circuit breaker 1 changes from the tripping state to the closing completion state. Therefore, the connecting pin 81 can not be removed until the loading state is reached from the tripping state.

The distance between the frame 91 and the connection pin 81 in the Y-axis direction is set to a length such that the connection between the connection link 83 and the drive shaft 74 is not released. For example, as shown in FIG. 11, the distance D1 between the connection pin 81 and the frame 91 is set shorter than the depth D2 of the connection hole 77.

Thereby, even when the retaining ring for preventing the connection pin 81 from falling off is not attached to the connection pin 81, the connection pin 81 can be prevented from falling off during the opening and closing operation from the drive shaft 74. It is possible to prevent 1 from becoming inoperable. The distance D1 between the connection pin 81 and the frame 91 may be set so that the connection pin 81 does not come off from one of the drive shaft 74 and the connection link 83. The connection between the drive shaft 74 and the connection pin 81 The relationship is not limited to the example shown in FIG.

When a retaining ring is attached to the connecting pin 81 and the connecting pin 81 is held by the retaining ring, a special tool is required when replacing the electromagnetic operation mechanism 70 or the like, and the space in the frame 91 is small. And it may not be easy to install. On the other hand, even when the retaining ring is not attached to the connecting pin 81, it is possible to prevent the connecting pin 81 from falling off during the opening and closing operation from the drive shaft 74, and the replacement operation of the electromagnetic operation mechanism 70 and the like is easy. Can be

Further, when the circuit breaker 1 is in the tripped state, as shown in FIG. 4, only a part of the connecting pin 81 is exposed from the opening 97 formed in the frame 91 as viewed from the axial direction of the connecting plate 62 It is a state. Further, in the state shown in FIG. 4, the connecting pin 95 is in a state of being locked to the frame 91, and no force acts on the connecting plate 62 in the counterclockwise direction by the open pole spring 92.

Therefore, in the state shown in FIG. 4, no force acts on the drive shaft 74 in the left-right direction. By pressing the drive shaft 74 rightward with a tool or hand from the state shown in FIG. 4, the entire connection pin 81 can be exposed from the frame 91 as shown in FIG. 12. Thereby, the connection pin 81 can be removed.

In addition, when the drive shaft 74 is driven by the electromagnetic operation mechanism 70, the circuit breaker 1 is not limited to a configuration in which the drive shaft 74 moves in the vertical direction and the drive shaft 74 is not inclined in the vertical direction. . That is, in a state where drive shaft 74 is driven by electromagnetic operation mechanism 70, circuit breaker 1 is configured such that drive shaft 74 is inclined leftward with respect to the vertical direction by the force of open electrode spring 92. It may be. In this case, the opening 97 of the frame 91 may be formed such that the entire connection pin 81 is exposed from the opening 97 when viewed from the axial direction of the connection plate 62 when the drive shaft 74 does not tilt in the vertical direction.

Further, in the above description, the drive shaft 74 is inclined leftward with respect to the vertical direction by the force of the opening spring 92 which is a spring member, but the drive shaft 74 is moved leftward by the biasing member other than the spring member. You can also add power. The biasing members other than the opening spring 92 are, for example, elastic members such as rubber.

Moreover, although the transmission part 60 and the electromagnetic operation mechanism part 70 were connected by the connection pins 81 and 82 and the connection link 83 in the above-mentioned, the structure of the connection part 80 is not limited to the example mentioned above. For example, the circuit breaker 1 may be configured to connect the transmission unit 60 and the electromagnetic operation mechanism unit 70 by the connection unit 80 including a plurality of connection links. In this case, the opening 97 is formed such that at least one connection pin and the opening 97 of the plurality of connection links are in the relationship between the connection pin 81 and the opening 97 described above. Further, the openings 97 may be formed such that the relationship between the plurality of connection pins and the openings 97 is the relationship between the connection pins 81 and the openings 97.

Further, in the circuit breaker 1 described above, the shaft 64 is fixed to the connection plate 62, but in the circuit breaker 1, the shaft 64 is fixed to the frame 91, and the connection plate 62 can rotate around the shaft center 65 to the shaft 64 It may be configured to be attached to

Moreover, the transmission part 60 is not limited to the structure mentioned above. For example, the transfer unit 60 may be configured such that the mover 30 is connected to the tip end of one rotation member that rotates about the axis 65. For example, the circuit breaker 1 may have a configuration in which the other end 612 of the operation arm 61 is rotatably attached to the shaft 64 about the shaft center 65 without providing the connection plate 62. Also, the transmission unit 60 may be configured to have one or more link members between the operation arm 61 and the connection plate 62.

The circuit breaker 1 described above is configured such that the operating arm 61 and the mover 30 are directly connected, but one or more members are interposed between the operating arm 61 and the mover 30 to operate the operating arm 61. And the mover 30 may be connected indirectly.

Moreover, although the circuit breaker 1 mentioned above is the structure which the connection plate 62 inclines left direction with respect to an up-down direction by the force of the opening spring 92, the direction made to incline by the force of the opening spring 92 is limited to left direction. And may be in the right direction. In this case, by pressing the drive shaft 74 leftward with a tool or a hand, the opening 97 is arranged such that the entire connection pin 81 is exposed from the opening 97 when viewed in the axial direction of the connection plate 62.

As described above, the circuit breaker 1 according to the first embodiment includes the power supply side fixed conductor 10, which is a stator having the fixed contact 10a, the mover 30 having the movable contact 30a, the transmission unit 60, and the electromagnetic operation mechanism. It includes a portion 70, a connecting portion 80, an opening spring 92 as a biasing member, and a frame 91. The transmission unit 60 includes a connection plate 62, which is an example of a rotation member, and moves the mover 30 with the rotation of the connection plate 62 to contact and isolate the fixed contact 10a and the movable contact 30a. Furthermore, the electromagnetic operation mechanism unit 70 has a drive shaft 74, and moves the drive shaft 74 linearly. The connection unit 80 connects the transmission unit 60 and the drive shaft 74, and rotates the connection plate 62 as the drive shaft 74 moves. The opening spring 92 applies a force to the connection plate 62 in a counterclockwise direction which is a rotation direction for separating the movable contact 30 a from the fixed contact 10 a. The frame 91 is connected to the drive shaft 74 of the connecting portion 80 in a state in which the connecting plate 62 is inclined in the first direction which is one of the left direction and the right direction with respect to the vertical direction by the force of the opening spring 92. And at least a part of the connecting pin 81, which is an example of the connecting member, is opposed in the axial direction of the connecting plate 62 to cover at least a part of the connecting pin 81. Thereby, it is possible to prevent the connection pin 81 from falling off during the closing operation and the tripping operation of the circuit breaker 1, and to prevent the circuit breaker 1 from becoming inoperable due to the falling off of the connection pin 81. Furthermore, in the frame 91, with the drive shaft 74 inclined in the second direction opposite to the first direction with respect to the vertical direction, the entire connection pin 81 is exposed as viewed from the axial direction of the connection plate 62. An opening 97 is provided at the position where Thus, for example, when the circuit breaker 1 is in the state shown in FIG. 6, the entire connection pin 81 can be exposed by moving the drive shaft 74 in the right direction. The replacement operation can be facilitated.

Further, the frame 91 covers at least a part of the connecting pin 81 in a state where the drive shaft 74 is not inclined with respect to the vertical direction. As a result, even when the drive shaft 74 is not inclined with respect to the vertical direction during the closing operation and the closing operation, the connection pin 81 can be prevented from falling off.

Further, in the transmission unit 60, the other end 612 is rotatably connected to the connection plate 62, which is an example of a plate member that rotates around the shaft center 65, and an example of the arm member in which the mover 30 is connected to one end 611 And an operation arm 61. The opening spring 92 is bridged between the frame 91 and the connection plate 62. The connecting portion 80 connects the connecting plate 62 and the drive shaft 74. As a result, a force can be applied to the drive shaft 74 in the direction intersecting the vertical direction by the opening spring 92 of the mechanical operation mechanism 90, and compared with the case where a biasing member is separately provided, the components of the circuit breaker 1 It is possible to suppress the increase in the number.

The configuration shown in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and one of the configurations is possible within the scope of the present invention. Parts can be omitted or changed.

DESCRIPTION OF SYMBOLS 1 Circuit breaker, 2 case, 3 insulation wall, 4,5 space part, 6 wall part, 7 mounting base, 8 through hole, 9 locking member, 10 power supply side fixed conductor, 10a fixed contact, 20 load side fixed conductor , 30 mover, 30a moveable contact, 40 flexible conductor, 50 holder, 51 contact pressure spring, 52 mover pin, 60 transfer portion, 61 operation arm, 62 connection plate, 63 link pin, 64 shaft, 65 axis, 66 engaging portion, 70 electromagnetic operation mechanism portion, 71 yoke, 72 coil, 73 movable iron core, 74 driving shaft, 75 bearing portion, 76 gap, 77 connecting hole, 78 locking block, 79 lifting mechanism, 80 connecting portion, 81 , 82, 95, 96 Link pin, 83 Link link, 84, 85 Link hole, 90 Machine operation mechanism, 91 frame, 92 Open Spring, 93 trip bar 94 latches, 97 opening, 101,201,301,401,611,621,921 one end, 102,202,302,402,612,622,922 other end.

Claims

A stator having fixed contacts,
A mover having a movable contact,
A transmitting unit having a rotating member and moving the mover in accordance with the rotation of the rotating member to make contact and separation between the fixed contact and the movable contact;
An electromagnetic operation mechanism unit having a shaft and moving the shaft linearly;
A connecting portion that connects the transmission portion and the shaft, and rotates the rotating member in accordance with the movement of the shaft;
A biasing member that applies a force to the rotating member in a rotational direction that separates the movable contact from the fixed contact;
In a state in which the shaft is inclined in a first direction with respect to the moving direction of the shaft by the force of the biasing member, at least a portion of a connecting pin of the connecting portion connected to the shaft and the rotating member An axially opposed frame covering at least a portion of the frame;
The frame is
The shaft is provided with an opening at a position where the entire connection pin is exposed when viewed from the axial direction in a state where the shaft is inclined in a second direction opposite to the first direction with respect to the movement direction. Circuit breaker characterized by
The circuit breaker according to claim 1, wherein the frame covers at least a part of the connection pin in a state where the shaft is not inclined with respect to the movement direction.
The rotating member is
It is a plate member that rotates around its axis,
The transmission unit is
An arm member having the mover coupled to one end and the other end rotatably coupled to the plate member;
The biasing member is
A spring member installed between the frame and the plate member;
The connecting portion is
The circuit breaker according to claim 1, wherein the plate member and the shaft are connected.