TW201911357A - Interrupter - Google Patents

Abstract

A circuit breaker (1) includes a frame (91) which is opposed to at least a part of a connecting pin (81) of a connecting part (80), that is connected to a shaft (74), in the axial direction of a rotating member (62), so as to cover the at least a part of the connecting pin (81), in a state in which the shaft (74) is inclined in a first direction with respect to a moving direction by the force of a biasing member (92). The frame (91) has an opening (97) at such a position which allows the whole connecting pin (81) to be exposed as being viewed from the axial direction of the rotating member (62) when the shaft (74) is inclined in a second direction opposite to the first direction with respect to the moving direction.

Description

   Interrupter   

The invention relates to a circuit breaker, which has a fixed contact and a movable contact, and is provided with an operation for making the movable contact contact the fixed contact or tripping the movable contact away from the fixed contact Electromagnetic operating mechanism.

Conventionally, as a circuit breaker that opens and closes a circuit, a spring-operated circuit breaker and an electromagnetically-operated circuit breaker are known. As described in Patent Document 1, the spring-operated breaker uses the energy of the stored spring to release the energy when it is released to perform the closing operation and the tripping operation of the movable contact.

In addition, as described in Patent Document 2, the electromagnetically operated breaker includes an electromagnetic operating mechanism portion connected to a movable contact with respect to a fixed contact through a transmission portion, and transmits driving force from the electromagnetic operating mechanism portion To the transmission part, the movable contact is turned on and off.

    [Prior Technical Literature]         [Patent Literature]    

Patent Document 1: Japanese Patent Laid-Open No. 6-89650

Patent Document 2: Japanese Patent Laid-Open No. 2008-159270

Interrupters are often used as main circuit breakers in buildings, factories, etc. In case of failure, they need to be restored in a short time. Therefore, although there is a case where the entire faulty interrupter is replaced, when there is no space for the reserve interrupter and there is no replacement interrupter, the power supply will be stopped for a long time. Therefore, sometimes only the defective parts in the breaker are replaced and repaired.

The spring-operated breaker uses a spring with a large load during the closing operation, and the breaker is always in a state where a large load is applied, so it is not easy to replace the parts in the breaker.

Since the electromagnetically operated circuit breaker utilizes the energy of the electromagnetic coil, there is no switching spring like a spring operated circuit breaker. However, for example, when the electromagnetic operation mechanism portion is damaged, the coupling portion connecting the electromagnetic operation mechanism portion and the transmission portion is located in the frame, and it is difficult to separate the electromagnetic operation mechanism portion from the transmission portion, and it is difficult to perform the electromagnetic operation mechanism portion or the electromagnetic operation Replacement of relevant parts of the organization department.

The present invention was developed in view of the above-mentioned problems, and its object is to obtain a breaker that can facilitate the replacement operation of the electromagnetic operating mechanism portion or the part related to the electromagnetic operating mechanism portion.

In order to solve the above problem and achieve the object, the breaker of the present invention includes: a stator with fixed contacts; a mover with movable contacts; a transmission portion; an electromagnetic operating mechanism portion; a connecting portion; a spring member; and frame. The transmission part has a rotating member, and the movable member moves along with the rotation of the rotating member to contact and isolate the fixed contact and the movable contact. The electromagnetic operating mechanism has a shaft and moves the shaft linearly. The connecting portion connects the transmission portion and the shaft, and rotates the rotating member as the shaft moves. The urging member urges the rotating member in a rotation direction that isolates the movable contact from the fixed contact. The frame is attached to at least a part of the connecting pin connected to the shaft in the axial direction of the rotating member and the connecting portion in a state where the shaft is inclined toward the first direction with respect to the moving direction of the shaft by the force of the elastic pushing member At least a part of the connecting pin is covered oppositely. The frame is provided with an opening at a position where the entire connecting pin is exposed when viewed from the axis direction of the rotation direction when the shaft is inclined in the second direction opposite to the first direction with respect to the moving direction.

According to the present invention, it is possible to achieve the effect that the replacement operation of the electromagnetic operation mechanism portion or the part related to the electromagnetic operation mechanism portion can be easily performed.

1‧‧‧Interrupter

2‧‧‧frame

3‧‧‧Insulation wall

4, 5‧‧‧ Space Department

6‧‧‧ Wall

7‧‧‧Stage

8‧‧‧Through hole

9‧‧‧ locking member

10‧‧‧Power side fixed conductor

10a‧‧‧ Fixed contact

20‧‧‧ Load side fixed conductor

30‧‧‧movable

30a‧‧‧movable contact

40‧‧‧Flexible conductor

50‧‧‧Retainer

51‧‧‧Compression spring

52‧‧‧Moveable pin

61‧‧‧Operation arm

62‧‧‧Link board

63‧‧‧Link pin

64‧‧‧shaft

65‧‧‧Axis

66‧‧‧Joint Department

70‧‧‧Electromagnetic Operation Department

71‧‧‧Yoke

72‧‧‧coil

73‧‧‧Moveable iron core

74‧‧‧Drive shaft

75‧‧‧Bearing Department

76‧‧‧ gap

77‧‧‧Link hole

78‧‧‧block

79‧‧‧ Lifting mechanism

80‧‧‧Link

81, 82, 95, 96

83‧‧‧Link

84, 85‧‧‧ connection hole

90‧‧‧ Mechanical Operation Department

91‧‧‧Frame

91a‧‧‧ Wall

92‧‧‧Open pole spring

93‧‧‧trip

94‧‧‧ latch

97‧‧‧ opening

98‧‧‧Semicircle

99‧‧‧shaft

101, 201, 301, 401, 611, 621, 921‧‧‧ one end

102, 202, 302, 402, 612, 622, 922‧‧‧‧ the other end

D1‧‧‧Interval

D2‧‧‧Depth

Fig. 1 is a diagram showing a configuration example of the interrupter of the first embodiment.

Fig. 2 is a diagram of the structure of the shutter of the first embodiment.

Fig. 3 is an enlarged view of the upper part of the electromagnetic operating mechanism of the first embodiment.

FIG. 4 is an enlarged view of the electromagnetic operating mechanism portion, the connecting portion, and the mechanical operating mechanism portion of Embodiment 1. FIG.

Fig. 5 is a diagram showing the on-state of completion of the interrupter of the first embodiment.

Fig. 6 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism portion or the mechanical operating mechanism portion of the first embodiment.

Fig. 7 is a diagram showing another example of a structure for restricting the downward movement of the drive shaft of the first embodiment.

Fig. 8 is a diagram showing another example of a structure for restricting the downward movement of the drive shaft of the first embodiment.

Fig. 9 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism portion or the mechanical operating mechanism portion of the first embodiment.

Fig. 10 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism portion or the mechanical operating mechanism portion of the first embodiment.

Fig. 11 is a side view showing the relationship between the frame, the connecting pin, the connecting link, and the bearing of the first embodiment.

FIG. 12 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism portion or the mechanical operating mechanism portion of the first embodiment.

The interrupter according to the embodiment of the present invention will be described in detail below based on the drawings. In addition, the present invention is not limited to this embodiment.

    (Embodiment 1)    

Fig. 1 is a diagram showing a configuration example of the interrupter of the first embodiment. The circuit breaker according to the first embodiment is, for example, a circuit breaker for opening and closing a circuit such as a low-voltage distribution line. In the following, for convenience of explanation, the positive direction of the Z axis is set to the upward direction, the negative direction of the Z axis is set to the downward direction, the positive direction of the X axis is set to the right direction, the negative direction of the X axis is set to the left direction, and the Y axis The positive direction is set to the front direction, and the negative direction of the Y axis is set to the rear direction.

As shown in FIG. 1, the interrupter 1 of the first embodiment includes: a frame body 2 formed of an insulating member; a power-side fixed conductor 10 connected to a power-side conductor (not shown); and a load-side fixed conductor 20, It is connected to a load-side conductor (not shown); the movable element 30 has a movable contact 30a; and the flexible conductor 40 has flexibility to electrically connect the load-side fixed conductor 20 and the movable element 30.

Inside the frame 2, space portions 4 and 5 partitioned by the insulating wall 3 are formed. The power supply-side fixed conductor 10 extends from the outside of the casing 2 to the space portion 4 and penetrates the wall portion 6 of the casing 2. One end portion 101 of the power supply side fixed conductor 10 protrudes outside and is connected to a power supply side conductor (not shown), and the other end portion 102 of the power supply side fixed conductor 10 is arranged in the space portion 4 and fixed with a fixed contact 10a.

The load-side fixed conductor 20 extends from the outside of the frame 2 to the space 4 in the same manner as the power-side fixed conductor 10 and penetrates the wall 6 of the frame 2. One end 201 of the load-side fixed conductor 20 protrudes outside and is connected to a load-side conductor (not shown), and the other end 202 of the load-side fixed conductor 20 is arranged in the space 4.

At one end 301 of the movable member 30, a movable contact 30a is provided, and the other end 302 of the movable member 30 is fixed to the 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.

In addition, the breaker 1 is provided with: a holder 50, which is rotatably mounted on the other end 202 of the load-side fixed conductor 20; a compression spring 51 is held by the holder 50; and a movable pin 52. It is held on the holder 50 in a rotatable manner. The contact spring 51 urges the movable member 30 in the clockwise direction about the movable pin 52, and applies the contact pressure when the movable contact 30a provided in the movable member 30 is connected to the fixed contact 10a Between the fixed contact 10a and the movable contact 30a.

The breaker 1 includes: a transmission part 60 connected to the movable member 30; an electromagnetic operation mechanism part 70 that moves the movable member 30 through the transmission part 60; a connection part 80 that connects the transmission part 60 and the electromagnetic operation mechanism part 70; and a machine The operation mechanism unit 90 maintains the on-completion state and releases the on-completion state in the breaker 1. In addition, the transmission part 60 is arranged across the space part 4 and the space part 5, and the electromagnetic operation mechanism part 70, the coupling part 80, and the mechanical operation mechanism part 90 are arranged in the space part 5. In addition, in the space portion 5, a mounting table 7 is arranged. At least a part of the mounting table 7 is located below the electromagnetic operating mechanism portion 70, and the mounting table 7 is fixed to the frame 2. The mounting table 7 is configured by, for example, a scaffold, a frame, or a case.

Here, the “on state” refers to a state where the fixed contact 10a is in contact with the movable contact 30a, and the “on operation” or “on operation” refers to the operation or operation of moving the movable contact 30a to contact the fixed contact 10a. The trip action or the trip operation means an action or operation to move the movable contact 30a away from the fixed contact 10a.

FIG. 2 is a diagram showing the structure in the housing 2 of the interrupter 1 of the first embodiment, FIG. 3 is an enlarged view of the upper part of the electromagnetic operating mechanism 70 shown in FIG. 2, and FIG. 4 An enlarged view of the electromagnetic operating mechanism portion 70, the coupling portion 80, and the mechanical operating mechanism portion 90 shown in FIG.

As shown in FIG. 2, the transmission part 60 includes: an operating arm 61, one end 611 of which is rotatably connected to the movable member 30 by a movable pin 52; a connection plate 62, one end 621 is rotatably connected to the other end portion 612 of the operating arm 61 by a link pin 63, and the connecting plate 62 is an example of a rotating member; and a shaft 64 is fixed to the central portion of the connecting plate 62, And rotate around the axis 65.

The electromagnetic operating mechanism section 70 is arranged below the connecting plate 62. In addition, the electromagnetic operation mechanism portion 70 and the insulating wall 3 are fixed by a fixing portion (not shown).

As shown in FIG. 2, the electromagnetic operating mechanism section 70 includes: a yoke 71 formed of a magnetic body; a coil 72 fixed to the inside of the yoke 71; and a movable iron core 73 that can face up and down The direction linearly reciprocates; the drive shaft 74 is fixed to the movable iron core 73; and the bearing portion 75 guides the drive shaft 74 so that it can linearly reciprocate in the vertical direction. The drive shaft 74 is reciprocated in the vertical direction at a position spaced from the axis 65 in the left direction. In addition, the movable iron core 73 and the drive shaft 74 need only be fixed, regardless of the fixing method of the movable iron core 73 and the drive shaft 74.

As shown in FIG. 3, the drive shaft 74 is arranged inside the yoke 71 and inside the bearing portion 75 via the gap 76. The drive shaft 74 is moved inside the yoke 71 and the bearing portion 75 in the up-down direction while maintaining the gap 76 constant by energizing the coil 72.

As shown in FIG. 4, the connecting portion 80 connecting the transmission portion 60 and the electromagnetic operating mechanism portion 70 is provided with connecting pins 81 and 82 and a connecting link 83. One of the coupling holes 84 of the coupling link 83 is rotatably supported by the coupling pin 81 in the coupling hole 77 shown in FIG. 3. The coupling hole 77 is formed in the front end portion of the drive shaft 74. The other connecting hole 85 of the connecting link 83 is rotatably supported by a connecting pin 82 in a connecting hole (not shown), which is formed in the middle of the connecting plate 62.

As shown in FIG. 4, the mechanical operating mechanism part 90 includes: a frame 91 fixed to the frame body 2; an open-pole spring 92 built between the frame 91 and the connecting plate 62; and a trip bar 93 The rotating shaft is supported on the frame 91; and a latch 94 is formed into 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, fixing means such as riveting of pins. When viewed from the extending direction of the axial center 65 belonging to the axial direction of the connecting plate 62, the frame 91 is opposed to a part of the transmission part 60 and at least a part of the connection part 80, covering a part of the transmission part 60 and at least a part of the connection part 80 . In addition, in the state shown in FIG. 4, although the rear wall portion 91a of the frame 91 is shown, the frame 91 is provided with the cover transmission portion 60 on the front side in the same way as the rear wall portion 91a. A part and a wall part of at least a part of the connecting part 80.

In the frame 91, an opening 97 for releasing the connection between the transmission part 60 and the electromagnetic operating mechanism part 70 by an operator is provided. The opening 97 shown in FIG. 4 is formed in the vicinity of the connecting pin 81 so that the connecting pin 81 can be removed without removing the frame 91 from the frame body 2. In addition, the relationship between the opening 97 and the connecting pin 81 will be described later.

One end portion 921 of the open-pole spring 92 is held by a connecting pin 95, and the connecting pin 95 is inserted into a connecting hole (not shown) formed in the connecting plate 62. In addition, the other end 922 of the open pole spring 92 is held by a connecting pin 96, and the connecting pin 96 is inserted into a connecting hole (not shown) formed in the frame 91. As a result, the open pole spring 92 is placed between the frame 91 and the coupling plate 62.

In a state in which the open pole spring 92 is erected between the frame 91 and the connecting plate 62, the open spring 92 is a tension plate that rotates clockwise about the axis 65 of the shaft 64 and provides energy for stretching spring. The open-pole spring 92 applies a counterclockwise force to the connecting plate 62 with the axis 65 as the center.

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

In the state shown in FIG. 1, the fixed contact 10a and the movable contact 30a are separated, and the breaker 1 is in the tripped state. The operation of the interrupter 1 when the on operation is performed from the state shown in FIG. 1 is explained below. FIG. 5 is a diagram showing the interrupter 1 in the completion state of the connection.

When the movable iron core 73 is moved upward by the energization of the coil 72 by the electromagnetic operating mechanism part 70 from the tripped state shown in FIG. 1, the drive shaft 74 fixed to the movable iron core 73 is also accompanied by the movable The iron core 73 moves upward and moves upward.

After the drive shaft 74 moves upward, the connecting plate 62 connected to the drive shaft 74 via the connecting portion 80 is driven through the connecting portion 80 and rotates clockwise around the axis 65. When the shaft 64 rotates clockwise, as shown in FIG. 5, the connecting plate 62 and the operating arm 61 are driven, and the connecting plate 62 and the operating arm 61 are arranged linearly.

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

In addition, when the coupling plate 62 rotates clockwise about the axis 65, the engaging portion 66 of the coupling plate 62 moves the latch 94 counterclockwise. Then, the latch 94 will be engaged with the semicircular portion 98 of the trip bar 93, and the latch 94 will be held by the trip bar 93 at the completed position. In addition, the latch 94 and the trip bar 93 are pushed by a spring force to perform a mechanical opening action.

Next, the operation of the breaker 1 when the trip operation of moving the movable contact 30a away from the fixed contact 10a is performed from the on completion state shown in FIG. In the completed state shown in FIG. 5, the open pole spring 92 is charged, and the connecting plate 62 is biased in the counterclockwise direction about the axis 65 of the shaft 64. .

When the trip bar 93 rotates in the clockwise direction, the engaging system of the trip bar 93 and the latch 94 is disengaged. Therefore, the connecting plate 62 is rotated counterclockwise by the open pole spring 92, and the other end 612 of the operating arm 61 moves upward as the connecting plate 62 rotates counterclockwise.

When the other end 612 of the operating arm 61 moves upward, the one end 611 of the operating arm 61 moves to the left. Therefore, the movable member 30 moves to the left, and the movable contact 30a is separated from the fixed contact 10a. As a result, in the interrupter 1, the circuit system including the power-side fixed conductor 10 and the load-side fixed conductor 20 is blocked.

Next, a method of replacing the electromagnetic operating mechanism portion 70 or the mechanical operating mechanism portion 90 will be described. 6, 9, 10, and 12 are explanatory diagrams regarding the method of replacing the electromagnetic operating mechanism portion 70 or the mechanical operating mechanism portion 90, and FIGS. 7 and 8 illustrate restricting the drive shaft 74 to FIG. 11 is a side view showing the relationship between the frame 91, the connecting pin 81, the connecting link 83, and the bearing 75. FIG.

When the breaker 1 is in the completed state, as shown in FIG. 5, the engaging portion 66 formed at the other end 622 of the connecting plate 62 is engaged with the trip bar 93, and the trip bar 93 is The latch 94 limits the state of rotation. Therefore, even in a state where the electric current does not flow through the coil 72 of the electromagnetic operation mechanism section 70, the on completion state shown in FIG. 5 is maintained.

When the drive shaft 74 is not driven by the electromagnetic operating mechanism portion 70, as shown in FIG. 6, by temporarily placing a block 78 below the drive shaft 74, the block 78 The movable iron core 73 is contacted to restrict the downward movement of the drive shaft 74. Then, in a state where the downward movement of the drive shaft 74 is restricted, the engagement between the trip bar 93 and the latch 94 is removed.

In a state where the drive shaft 74 is not driven by the electromagnetic operating mechanism portion 70, when a counterclockwise force is applied to the coupling plate 62, the force in a direction crossing the movement direction of the drive shaft 74, that is, the up-down direction is transmitted The coupling portion 80 acts on the drive shaft 74. 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 becomes relatively vertical The state is inclined to the left.

Here, although the above-mentioned installation of the locking block 78 is performed by the operator by placing the locking block 78 on the mounting table 7, as long as the locking block 78 is arranged below the movable iron core 73 It is sufficient to constitute the interrupter 1, and the installation of the locking block 78 is not limited to the above example.

For example, the interrupter 1 may be configured to automatically arrange the locking block 78 so as to be arranged below the movable iron core 73. Specifically, as shown in FIG. 7, the interrupter 1 may be configured to have an elevating mechanism 79 that elevates the locking block 78. At this time, when the operator operates an operation button (not shown), the lifting mechanism 79 moves the locking block 78 upward, and restricts the movement of the drive shaft 74 downward. In addition, the lifting mechanism 79 may be configured to move the locking block 78 upward only when the coil 72 of the electromagnetic operating mechanism portion 70 is not energized.

In addition, the interrupter 1 can also move the locking block 78 downwardly of the movable iron core 73 by moving the locking block 78 in the left-right direction or in the up-down direction to restrict the downward movement of the drive shaft 74 Composition to replace the lifting mechanism 79.

In addition, in the above example, although the locking block 78 restricts the downward movement of the drive shaft 74, other locking members may also be used to restrict the downward movement of the drive shaft 74 instead of locking. Block 78. For example, in the electromagnetic operating mechanism portion 70 shown in FIG. 8, the yoke 71 is provided with a plurality of through holes 8, and the locking member 9 is inserted into the plurality of through holes 8. In this state, the movement of the locking member 9 in the up-down direction is restricted, and the drive shaft 74 is located 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 addition, in the example shown in FIG. 8, although the through hole 8 is provided in the yoke 71, it may be a member having the through hole 8 fixed under the yoke 71 shown in FIG. 6. And, the locking member 9 is inserted into the through-hole 8 of the member fixed to the yoke 71 to restrict the downward movement of the drive shaft 74 in the same manner as the example shown in FIG. 8.

As shown in FIG. 9, when the left side of the drive shaft 74 is pressed against the bearing portion 75, when viewed from the axial direction of the coupling plate 62, that is, the Y-axis direction, only a part of the coupling pin 81 is formed from The state where the opening 97 of the frame 91 is exposed. In the state shown in FIG. 9, the drive shaft 74 is pushed to the right by a tool or hand, and as shown in FIG. 10, the bearing shaft 75 is pressed from the left side of the drive shaft 74 In this state, the right side is pressed against the bearing 75.

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

Then, by removing the connection pin 81, the transmission part 60 can be separated from the electromagnetic operation mechanism part 70, and the electromagnetic operation mechanism part 70 can be replaced safely. In addition, since the transmission portion 60 can be separated from the electromagnetic operating mechanism portion 70, the force from the electromagnetic operating mechanism portion 70 does not act on the mechanical operating mechanism portion 90, so the mechanical operating mechanism portion 90 can be replaced safely. The part related to the electromagnetic operation mechanism part 70.

In addition, as for the opening 97 of the frame 91, when the shutter 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 when viewed from the axial direction of the connecting plate 62. In addition, in the electromagnetic operation mechanism section 70, the drive shaft 74 is kept in the state of extending in the vertical direction while the current is supplied to the coil 72.

Therefore, during the period from the tripped state shown in FIG. 4 to the on-complete state shown in FIG. 5 by the current supply to the coil 72, the drive shaft 74 is kept on the axis from the connecting plate 62. When viewed in the direction, only a part of the connecting pin 81 moves up and down in a state where it is exposed from the opening 97.

That is, during the period from the tripped state to the on-completed state, the breaker 1 does not become in a state where all of the connecting pins 81 are exposed from the opening 97 when viewed from the axial direction of the connecting plate 62. Therefore, the connecting pin 81 cannot be removed from the tripped state to the completed state.

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

Thereby, even if the connecting pin 81 is not equipped with a retaining ring that prevents the connecting pin 81 from falling off, the connecting pin 81 can be prevented from falling off the drive shaft 74 during the opening and closing operation, and the shutter 1 can be prevented from not operating. In addition, as long as the distance D1 between the coupling pin 81 and the frame 91 is set so that the coupling pin 81 does not fall off from one of the driving shaft 74 and the coupling link 83, the coupling relationship between the driving shaft 74 and the coupling pin 81 is not Limited to the example shown in Figure 11.

When the 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 for the replacement operation of the electromagnetic operating mechanism portion 70 and the like, and because the space in the frame 91 is small, it may not Remove and install the retaining ring. On the other hand, even when the retaining ring is not attached to the coupling pin 81, the coupling pin 81 can be prevented from falling off from the drive shaft 74 during the opening and closing operation, and replacement work of the electromagnetic operating mechanism portion 70 and the like can be easily performed.

In addition, when the shutter 1 is in the tripped state, as shown in FIG. 4, when viewed from the axial direction of the connecting plate 62, only a part of the connecting pin 81 is exposed from the opening 97 formed in the frame 91. In the state shown in Fig. 4, the connecting pin 95 is locked to the frame 91, and the counterclockwise force by the open pole spring 92 does not act on the connecting plate 62.

Therefore, in the state shown in FIG. 4, no force in the left-right direction acts on the drive shaft 74. From the state shown in FIG. 4, the drive shaft 74 is pushed to the right with a tool or hand, whereby the entire connecting pin 81 can be exposed from the frame 91 as shown in FIG. 12. With this, the connecting pin 81 can be removed.

In addition, the breaker 1 is not limited to the following configuration: when the drive shaft 74 is driven by the electromagnetic operating mechanism portion 70, the drive shaft 74 moves in the vertical direction, and the drive shaft 74 is not relative to the vertical direction Inclined composition. That is, the interrupter 1 may be such that when the drive shaft 74 is driven by the electromagnetic operating mechanism 70, the drive shaft 74 is inclined to the left with respect to the up-down direction due to the force of the open spring 92 The composition of the state. At this time, the opening 97 of the frame 91 may be formed such that when the drive shaft 74 is not inclined with respect to the vertical direction, the entire connecting pin 81 is exposed from the opening 97 when viewed from the axial direction of the connecting plate 62.

In addition, in the above, the drive shaft 74 is inclined to the left with respect to the up-down direction by the force of the spring member, that is, the open pole spring 92, but it can also be moved to the left by the spring member other than the spring member The force is applied to the drive shaft 74. The elastic pushing member other than the open pole spring 92 is an elastic member such as rubber.

In addition, in the above, although the transmission portion 60 and the electromagnetic operating mechanism portion 70 are connected by the connection pins 81 and 82 and the connection link 83, the configuration of the connection portion 80 is not limited to the above-mentioned example. For example, the breaker 1 may be configured to connect the transmission portion 60 and the electromagnetic operating mechanism portion 70 by a plurality of connecting portions 80 including connecting links. At this time, the opening 97 is formed so that at least one connecting pin and the opening 97 of the plurality of connecting links become the above-mentioned relationship between the connecting pin 81 and the opening 97. In addition, the opening 97 may be formed so that the relationship between the plurality of connecting pins and the opening 97 becomes the relationship between the connecting pin 81 and the opening 97.

In addition, in the above-mentioned breaker 1, although the shaft 64 is fixed to the coupling plate 62, the breaker 1 may be such that the shaft 64 is fixed to the frame 91 and the coupling plate 62 is centered on the axis 65 The shaft 64 is rotatably mounted.

In addition, the transmission part 60 is not limited to the above-mentioned structure. For example, the transmission unit 60 may be configured such that the movable member 30 is connected to the front end of one rotating member that rotates about the axis 65. For example, the breaker 1 may be configured such that the connecting plate 62 is not provided, and the other end portion 612 of the operating arm 61 is rotatably attached to the shaft 64 with the axis 65 as the center. In addition, the transmission part 60 may have a structure having one or more link members between the operation arm 61 and the coupling plate 62.

In addition, in the above-described breaker 1, although the operation arm 61 and the movable member 30 are directly connected, the operation arm 61 may be indirectly connected by one or more members between the operation arm 61 and the movable member 30. Composition with mover 30.

In addition, although the above-mentioned breaker 1 is configured to tilt the connecting plate 62 to the left direction with respect to the up-down direction by the force of the open pole spring 92, the direction of the tilt by the force of the open pole spring 92 is not limited In the left direction, it can also be in the right direction. At this time, the opening 97 is arranged so that the entire connecting pin 81 is exposed from the opening 97 when viewed from the axial direction of the connecting plate 62 by pushing the drive shaft 74 to the left with a tool or hand.

As described above, the interrupter 1 of the first embodiment includes: the power supply side fixed conductor 10, which is a stator having a fixed contact 10a; the mover 30 having the movable contact 30a; the transmission part 60; and the electromagnetic operation mechanism part 70 ; The connecting portion 80; The open pole spring 92, which is an elastic pushing member; and The frame 91. The transmission unit 60 includes a coupling plate 62 which is an example of a rotating member. The movable platen 30 moves with the rotation of the coupling plate 62 to contact and isolate the fixed contact 10a and the movable contact 30a. In addition, the electromagnetic operating mechanism portion 70 includes a drive shaft 74, and the drive shaft 74 is linearly moved. The connecting portion 80 connects the transmission portion 60 and the drive shaft 74, and rotates the connecting plate 62 as the drive shaft 74 moves. The open-pole spring 92 biases the connecting plate 62 in a counterclockwise direction, which is a rotation direction that isolates the movable contact 30a from the fixed contact 10a. In a state where the connecting plate 62 is inclined to one of the left and right directions with respect to the up-down direction, that is, the first direction by the force of the open pole spring 92, the frame 91 is in the axial direction of the connecting plate 62 and the connecting portion 80 Among them, at least a part of the connecting pin 81 which is an example of a connecting member connected to the drive shaft 74 faces and covers at least a part of the connecting pin 81. Thereby, the connection pin 81 can be prevented from falling off during the closing operation and the tripping operation of the breaker 1, and the breaker 1 can be prevented from being inoperative because the connection pin 81 is falling off. Furthermore, the frame 91 is in a position where the entire connecting pin 81 is exposed when viewed from the axial direction of the connecting plate 62 in a state where the drive shaft 74 is inclined in the second direction opposite to the first direction with respect to the up-down direction. With opening 97. Thus, for example, when the breaker 1 is in the state shown in FIG. 6, by moving the drive shaft 74 to the right, the entire connecting pin 81 can be exposed, and the electromagnetic operating mechanism portion 70 can be made The replacement work is easy.

In addition, 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. Thereby, even when the drive shaft 74 is not inclined with respect to the up-down direction during the on operation and the trip operation, the coupling pin 81 can be prevented from falling off.

In addition, the transmission section 60 includes an operation arm 61 that is an example of an arm member, and the other end portion 612 of the operation arm 61 is rotatably connected to a connection plate 62 that is an example of a plate member that rotates around an axis 65. The movable element 30 is connected to one end 611. The open pole spring 92 is installed between the frame 91 and the connecting plate 62. The connecting portion 80 connects the connecting plate 62 and the drive shaft 74. Thereby, the open shaft spring 92 of the mechanical operation mechanism part 90 can bias the drive shaft 74 in a direction crossing the up-down direction. Compared with the case where a spring member is separately provided, the configuration of the breaker 1 can be suppressed The number of parts has increased.

The configuration shown in the above embodiment shows an example of the content of the present invention, and may be combined with other well-known technologies. As long as it does not deviate from the gist of the present invention, a part of the configuration may be omitted or changed.

Claims (3)

    A breaker includes: a stator with fixed contacts; a movable member with movable contacts; a transmission portion with a rotating member that moves the movable member to perform the fixing as the rotating member rotates Contact and isolation of the contact and the movable contact; the electromagnetic operating mechanism portion has a shaft and moves the shaft linearly; the connecting portion connects the transmission portion and the shaft with the shaft The movement of the rod rotates the rotating member; the elastic pushing member applies a force to the rotating member in a rotating direction separating the movable contact from the fixed contact; and the frame is attached to the shaft by the elastic pushing member In a state where the force is inclined to the first direction with respect to the movement direction of the shaft, the axial direction of the rotating member is opposed to at least a part of the connecting pin of the connecting portion connected to the shaft to cover the at least Part; the frame is in a state where the shaft is inclined in a second direction opposite to the first direction with respect to the moving direction, from the aforementioned It will reveal the overall position of the connecting pin is provided with an opening direction when viewed.         The breaker according to item 1 of the patent application range, wherein the frame covers at least a part of the connecting pin in a state where the shaft is not inclined with respect to the moving direction.         The interrupter according to item 1 or 2 of the patent application scope, wherein the rotating member is a plate member that rotates around an axis; the transmission part includes an arm member, and one end of the arm member is connected to The other end of the movable member is rotatably connected to the plate member; the spring member is a spring member erected between the frame and the plate member; and the connection portion connects the plate member and the shaft.