CN111095467A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN111095467A CN111095467A CN201780093368.9A CN201780093368A CN111095467A CN 111095467 A CN111095467 A CN 111095467A CN 201780093368 A CN201780093368 A CN 201780093368A CN 111095467 A CN111095467 A CN 111095467A
- Authority
- CN
- China
- Prior art keywords
- shaft
- circuit breaker
- coupling
- frame
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Breakers (AREA)
Abstract
A circuit breaker (1) is provided with: a transmission part which moves the movable piece along with the rotation of the rotating part (62) to contact and separate the fixed contact and the movable contact; an electromagnetic operation mechanism unit (70) that linearly moves the shaft (74); a connecting part (80) which connects the transmission part and the shaft (74) and rotates the rotating part (62) along with the movement of the shaft (74); and a frame (91) that covers at least a part of the connecting pin (81) of the connecting section (80) that is connected to the shaft (74) in the axial direction of the rotating member (62) so as to face at least a part of the connecting pin (81) in the connecting section (80) in a state in which the shaft (74) is tilted in the 1 st direction with respect to the movement direction by the force of the biasing member (92). The frame (91) has an opening (97) at a position where the entire coupling pin (81) is exposed when viewed in the axial direction of the rotating member (62) in a state where the shaft (74) is inclined in the 2 nd direction, which is the opposite direction to the 1 st direction, with respect to the moving direction.
Description
Technical Field
The present invention relates to a circuit breaker including an electromagnetic operating mechanism portion having a fixed contact and a movable contact, and performing a closing operation for bringing the movable contact into contact with the fixed contact or a tripping operation for separating the movable contact from the fixed contact.
Background
Conventionally, as a circuit breaker for opening and closing an electric circuit, a spring-operated circuit breaker and an electromagnetic-operated circuit breaker are known. As described in patent document 1, the spring-operated circuit breaker performs a closing operation and a tripping operation of the movable contact by using energy released when the stored spring force is released.
As described in patent document 2, the electromagnetic operation type circuit breaker includes an electromagnetic operation mechanism portion coupled to a movable contact point facing a fixed contact point via a transmission portion, and performs a closing operation and a tripping operation of the movable contact point by transmitting a driving force from the electromagnetic operation mechanism portion to the transmission portion.
Patent document 1: japanese laid-open patent publication No. 6-89650
Patent document 2: japanese laid-open patent publication No. 2008-159270
Disclosure of Invention
Generally, a circuit breaker is often used as a main circuit breaker for buildings, factories, and the like, and a short-time recovery is required in the case of an accidental failure. Therefore, the entire circuit breaker having a failure may be replaced, but if there is no space for placing a spare circuit breaker and there is no replacement circuit breaker, the energization is stopped for a long time. Therefore, only the component having the failure in the circuit breaker may be replaced and repaired.
In the spring-operated circuit breaker, a spring having a large load is used during the closing operation, and the circuit breaker is always in a state of receiving a large load, so that it is not easy to replace the components in the circuit breaker.
Since the solenoid-operated circuit breaker uses energy of the solenoid, there is no closing spring such as a spring-operated circuit breaker. However, for example, when the electromagnetic operation mechanism portion is broken, the connection portion connecting the electromagnetic operation mechanism portion and the transmission portion is in the frame, and it is difficult to separate the electromagnetic operation mechanism portion and the transmission portion, and the replacement work of the electromagnetic operation mechanism portion or a portion related to the electromagnetic operation mechanism portion is not easy.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a circuit breaker capable of easily performing a replacement operation of an electromagnetic operating mechanism portion or a portion related to the electromagnetic operating mechanism portion.
In order to solve the above problems and achieve the object, a circuit breaker according to the present invention includes: a fixed member having a fixed contact; a movable member having a movable contact; a transmission section; an electromagnetic operating mechanism section; a connecting portion; a pre-tightening component; and a frame. The transmission part has a rotating member, and moves the movable element with the rotation of the rotating member to contact and separate the fixed contact and the movable contact. The electromagnetic operating mechanism has a shaft, and moves the shaft linearly. The coupling portion couples the transmission portion and the shaft, and rotates the rotating member with the movement of the shaft. The biasing member applies a force to the rotating member in a rotating direction in which the movable contact is isolated from the fixed contact. The frame covers at least a part of the coupling pin coupled to the shaft in the coupling portion in the axial direction of the rotating member while the shaft is inclined in the 1 st direction with respect to the moving direction of the shaft by the force of the biasing member. The frame has an opening at a position where the entire coupling pin is exposed when viewed from the axial direction in a state where the shaft is inclined in a 2 nd direction opposite to the 1 st direction with respect to the moving direction.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, there is an effect that the replacement work of the electromagnetic operating mechanism portion or the portion related to the electromagnetic operating mechanism portion can be easily performed.
Drawings
Fig. 1 is a diagram showing a configuration example of a circuit breaker according to embodiment 1.
Fig. 2 is a diagram showing a structure inside a housing of the circuit breaker according to embodiment 1.
Fig. 3 is an enlarged view of the upper portion of the electromagnetic operating mechanism according to embodiment 1.
Fig. 4 is an enlarged view of the electromagnetic operating mechanism, the coupling portion, and the mechanical operating mechanism according to embodiment 1.
Fig. 5 is a diagram showing a closing completion state of the circuit breaker according to embodiment 1.
Fig. 6 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism unit or the mechanical operating mechanism unit according to embodiment 1.
Fig. 7 is a diagram showing another example of the structure for restricting the downward movement of the driving shaft according to embodiment 1.
Fig. 8 is a diagram showing another example of the structure for restricting the downward movement of the driving shaft according to embodiment 1.
Fig. 9 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism unit or the mechanical operating mechanism unit according to embodiment 1.
Fig. 10 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism unit or the mechanical operating mechanism unit according to embodiment 1.
Fig. 11 is a side view showing the relationship among the frame, the connecting pin, the connecting link, and the bearing portion according to embodiment 1.
Fig. 12 is an explanatory diagram of a method of replacing the electromagnetic operating mechanism unit or the mechanical operating mechanism unit according to embodiment 1.
Detailed Description
Hereinafter, a circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments.
Embodiment 1.
Fig. 1 is a diagram showing a configuration example of a circuit breaker according to embodiment 1. The circuit breaker according to embodiment 1 is, for example, a circuit breaker that opens and closes an electric circuit such as a low-voltage distribution line. For convenience of explanation, the positive Z-axis direction is set to the upward direction, the negative Z-axis direction is set to the downward direction, the positive X-axis direction is set to the right direction, the negative X-axis direction is set to the left direction, the positive Y-axis direction is set to the front direction, and the negative Y-axis direction is set to the rear direction.
As shown in fig. 1, a circuit breaker 1 according to embodiment 1 includes: a frame 2 formed of an insulating member; a power supply side fixed conductor 10 connected to a power supply side conductor not shown; a load side fixed conductor 20 connected to a load side conductor not shown; a movable element 30 having a movable contact 30 a; and a flexible conductor 40 electrically connecting the load side fixed conductor 20 and the movable element 30 and having flexibility.
Similarly to the power supply side fixed conductor 10, the load side fixed conductor 20 extends from the outside of the housing 2 toward the space 4, and penetrates the wall 6 of the housing 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 30a is provided at one end 301 of the movable element 30, and the other end 302 of the movable element 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.
In addition, the circuit breaker 1 includes: a holder 50 rotatably attached to the other end 202 of the load side fixed conductor 20; a pressure contact spring 51 held by the holder 50; and a movable pin 52 rotatably held by the holder 50. The pressure contact spring 51 biases the movable element 30 in a direction of rotating clockwise about the movable element pin 52, and applies a contact pressure between the fixed contact 10a and the movable contact 30a when the movable contact 30a provided in the movable element 30 is connected to the fixed contact 10 a.
The circuit breaker 1 includes: a transmission part 60 connected to the movable element 30; an electromagnetic operation mechanism unit 70 for moving the movable element 30 via the transmission unit 60; a coupling portion 80 that couples the transmission portion 60 and the electromagnetic operation mechanism portion 70; and a mechanical operation mechanism unit 90 that maintains and releases the closing completion state in the circuit breaker 1. The transmission unit 60 is disposed across the space portion 4 and the space portion 5, and the electromagnetic operation mechanism unit 70, the connection unit 80, and the mechanical operation mechanism unit 90 are disposed in the space portion 5. Further, a mounting table 7 is disposed in the space portion 5, and at least a part of the mounting table 7 is positioned below the electromagnetic operation mechanism portion 70 and fixed to the housing 2. The mounting table 7 is constituted by, for example, a rack, a frame, or a housing.
Here, the on state refers to a state in which the fixed contact 10a and the movable contact 30a are in contact, and the on operation or the on operation refers to an operation or an operation in which the movable contact 30a is moved to be in contact with the fixed contact 10 a. The trip action or trip operation means an action or operation of separating the movable contact 30a from the fixed contact 10 a.
Fig. 2 is a diagram showing the structure inside the housing 2 of the circuit breaker 1 according to embodiment 1, fig. 3 is an enlarged view of the upper portion of the electromagnetic operating mechanism unit 70 shown in fig. 2, and fig. 4 is an enlarged view of the electromagnetic operating mechanism unit 70, the coupling portion 80, and the mechanical operating mechanism unit 90 shown in fig. 2.
As shown in fig. 2, the transmission unit 60 includes: an operation arm 61 having one end 611 rotatably coupled to the movable element 30 via a movable element pin 52; a coupling plate 62 as an example of a rotating member, one end 621 of which is rotatably coupled to the other end 612 of the operation arm 61 via a link pin 63; and a shaft 64 fixed to a central portion of the connecting plate 62 and rotating about an axial center 65.
The electromagnetic operating mechanism 70 is disposed below the connecting plate 62. The electromagnetic operating 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 unit 70 includes: a yoke 71 formed of a magnet; a coil 72 fixed to the inside of the yoke 71; a movable core 73 that can linearly reciprocate in the vertical direction; a drive shaft 74 fixed to the movable core 73; and a bearing 75 that guides the drive shaft 74 so as to be linearly reciprocated in the vertical direction. The drive shaft 74 reciprocates in the up-down direction at positions spaced leftward from the shaft center 65. The movable core 73 and the drive shaft 74 may be fixed, regardless of the method of fixing the movable core 73 and the drive shaft 74.
As shown in fig. 3, the drive shaft 74 is disposed inside the yoke 71 and inside the bearing 75 via a gap 76. The drive shaft 74 moves in the vertical direction inside the yoke 71 and the bearing 75 while maintaining the gap 76 constant by the energization of the coil 72.
As shown in fig. 4, the coupling portion 80 that couples the transmission portion 60 and the electromagnetic operation mechanism portion 70 includes coupling pins 81 and 82 and a coupling link 83. One coupling hole 84 of the coupling link 83 is journaled to a coupling hole 77 shown in fig. 3 formed at the distal end portion of the drive shaft 74 by a coupling pin 81. The other coupling hole 85 of the coupling link 83 is journaled to a coupling hole, not shown, formed in an intermediate portion of the coupling plate 62 by a coupling pin 82.
As shown in fig. 4, the mechanical operation mechanism section 90 includes: a frame 91 fixed to the frame 2; a breaking spring 92 bridged between the frame 91 and the linking plate 62; a trip bar 93 pivotally supported to the frame 91 to be rotatable; and a latch 94 formed in an L shape.
The frame 91 is coupled 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 unit 60 and at least a part of the coupling unit 80 when viewed from the axial direction of the coupling plate 62, that is, the extending direction of the shaft center 65, and covers the part of the transmission unit 60 and at least a part of the coupling unit 80. In the state shown in fig. 4, the rear wall 91a of the frame 91 is shown, but the frame 91 is also provided on the front side with a wall covering a part of the transmission portion 60 and at least a part of the connection portion 80, similarly to the rear wall 91 a.
The frame 91 is provided with an opening 97, and the operator releases the coupling between the transmission unit 60 and the electromagnetic operating mechanism unit 70 through the opening 97. 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. The relationship between the opening 97 and the coupling pin 81 will be described in detail later.
One end 921 of the opening spring 92 is held by a coupling pin 95, and the coupling pin 95 is inserted into a coupling hole, not shown, formed in the coupling plate 62. The other end 922 of the opening spring 92 is held by a coupling pin 96, and the coupling pin 96 is inserted into a coupling hole, not shown, formed in the frame 91. Thereby, the opening spring 92 is stretched between the frame 91 and the connecting plate 62.
In a state where the opening spring 92 is bridged between the frame 91 and the link plate 62, the opening spring 92 is a tension spring that accumulates energy when the link plate 62 rotates clockwise about the axial center 65 of the shaft 64. The opening spring 92 applies a counterclockwise force to the link plate 62 about the shaft center 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 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, and when the circuit breaker 1 is in the on-completed state, the latch 94 engages the trip bar 93 with an arc portion of the semicircular portion 98.
In the state shown in fig. 1, the fixed contact 10a and the movable contact 30a are separated, and the circuit breaker 1 is in a trip 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 diagram showing the circuit breaker 1 in the on-completion state.
When the movable core 73 is moved upward by energization of the coil 72 of the electromagnetic operating mechanism portion 70 from the trip state shown in fig. 1, the drive shaft 74 fixed to the movable core 73 is also moved upward in association with the upward movement of the movable core 73.
When the drive shaft 74 moves upward, the coupling plate 62 coupled to the drive shaft 74 via the coupling portion 80 is driven to rotate clockwise about the shaft center 65 via the coupling portion 80. When the shaft 64 rotates in the clockwise direction, the coupling plate 62 and the operation arm 61 are driven, and the coupling plate 62 and the operation arm 61 are linearly arranged, as shown in fig. 5.
Thereby, the movable element 30 moves in the right direction, and the movable contact 30a comes into contact with the fixed contact 10 a. Then, the contact pressure is applied between the fixed contact 10a and the movable contact 30a by the pressure contact spring 51, and the on-completion state is maintained. In the on state, the power source side fixed conductor 10 is electrically connected to the load side fixed conductor 20 via the fixed contact 10a, the movable contact 30a, the movable element 30, and the flexible conductor 40.
Further, if the coupling plate 62 rotates clockwise about the axial center 65, the engaging portion 66 of the coupling plate 62 moves the latch 94 counterclockwise. The latch 94 engages with the semicircular portion 98 of the trip bar 93, and the latch 94 is held by the trip bar 93 at the closing completion position. Further, the latch 94 and the trip bar 93 are biased by a spring force to enable a mechanical opening action.
The operation of the circuit breaker 1 when the trip operation for separating the movable contact 30a from the fixed contact 10a is performed from the on-state shown in fig. 5 will be described. In the on-state shown in fig. 5, the off spring 92 is charged and applies a force in a direction to rotate the link plate 62 counterclockwise about the axial center 65 of the shaft 64.
If the trip bar 93 is rotated clockwise, the engagement of the trip bar 93 and the latch 94 is disengaged. Therefore, the link plate 62 is rotated counterclockwise by the opening spring 92, and the other end portion 612 of the operation arm 61 is moved upward in accordance with the counterclockwise rotation of the link plate 62.
If the other end 612 of the operation arm 61 moves upward, the one end 611 of the operation arm 61 moves leftward. Therefore, the movable element 30 moves in the left direction, and the movable contact 30a is separated from the fixed contact 10 a. Thus, the circuit breaker 1 opens the circuit including the power source side fixed conductor 10 and the load side fixed conductor 20.
Next, a method of replacing the electromagnetic operating mechanism unit 70 or the mechanical operating mechanism unit 90 will be described. Fig. 6, 9, 10, and 12 are explanatory views of a method of replacing the electromagnetic operating mechanism unit 70 or the mechanical operating mechanism unit 90, fig. 7 and 8 are views showing another example of a structure for restricting downward movement of the drive shaft 74, and fig. 11 is a side view showing a relationship among the frame 91, the connecting pin 81, the connecting link 83, and the bearing 75.
When the circuit breaker 1 is in the on-state, as shown in fig. 5, the engagement portion 66 formed at the other end 622 of the linking plate 62 engages with the trip bar 93, and the rotation of the trip bar 93 is restricted by the latch 94. Therefore, even in a state where no current flows through the coil 72 of the electromagnetic operating mechanism portion 70, the on-completion state shown in fig. 5 is maintained.
In a state where the drive shaft 74 is not driven by the electromagnetic operation mechanism portion 70, as shown in fig. 6, the locking piece 78 is temporarily provided below the drive shaft 74, and the downward movement of the drive shaft 74 is restricted by bringing the locking piece 78 into contact with the movable core 73. Then, the engagement between the trip bar 93 and the latch 94 is released in a state where the downward movement of the drive shaft 74 is restricted.
In a state where the drive shaft 74 is not driven by the electromagnetic operation mechanism portion 70, if a counterclockwise force is applied to the coupling plate 62, the drive shaft 74 is urged in a direction intersecting the moving direction of the drive shaft 74, i.e., the vertical direction, via the coupling portion 80. Since the gap 76 is formed between the drive shaft 74 and the bearing 75 as shown in fig. 3, when the left side of the drive shaft 74 is pressed by the bearing 75, the drive shaft 74 is inclined leftward with respect to the vertical direction.
Here, the above-described setting of the locking piece 78 is performed by the operator placing the locking piece 78 on the mounting table 7, but the setting of the locking piece 78 is not limited to the above-described example as long as the circuit breaker 1 is configured such that the locking piece 78 is disposed below the movable core 73.
For example, the circuit breaker 1 may be configured such that the locking piece 78 is automatically disposed below the movable core 73. Specifically, as shown in fig. 7, the circuit breaker 1 may have a lifting mechanism 79 for lifting and lowering the engaging piece 78. In this case, when an operation button, not shown, is operated by an operator, the lifting mechanism 79 moves the locking block 78 upward to restrict the downward movement of the drive shaft 74. The elevating mechanism 79 may be configured to move the locking piece 78 upward only when the coil 72 of the electromagnetic operating mechanism 70 is not energized.
In the circuit breaker 1, the locking piece 78 may be moved downward of the movable core 73 by moving the locking piece 78 in the left-right direction or the up-down direction instead of the elevating mechanism 79, thereby restricting the downward movement of the driving shaft 74.
In the above example, the downward movement of the drive shaft 74 is restricted by the locking piece 78, but the downward movement of the drive shaft 74 may be restricted by another locking member instead of the locking piece 78. For example, in the electromagnetic operating mechanism 70 shown in fig. 8, a plurality of through holes 8 are provided in the yoke 71, 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 vertical direction is restricted, and the drive shaft 74 is positioned above the locking member 9. Therefore, as shown in fig. 8, the movable 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, but the downward movement of the drive shaft 74 can be restricted in the same manner as the example shown in fig. 8 by fixing a member having the through hole 8 to the lower side of the yoke 71 shown in fig. 6 and inserting the locking member 9 into the through hole 8 of the member fixed to the yoke 71.
As shown in fig. 9, when the left side of the drive shaft 74 is pressed by the bearing 75, only a part of the coupling pin 81 is exposed from the opening 97 formed in the frame 91 when viewed in the Y-axis direction, which is the axial direction of the coupling plate 62. In the state shown in fig. 9, the drive shaft 74 is pressed rightward by a tool or a hand, and as shown in fig. 10, the drive shaft 74 is pressed from the state where the left side is pressed by the bearing portion 75 to the state where the right side is pressed by the bearing portion 75.
In the state shown in fig. 10, the right side of the drive shaft 74 is pressed by the bearing 75, the drive shaft 74 is inclined rightward with respect to the vertical direction, and the entire coupling pin 81 is exposed from the opening 97 formed in the frame 91 when viewed in the axial direction of the coupling plate 62. Therefore, the coupling pin 81 can be easily detached from the circuit breaker 1 by pulling or pressing the coupling pin 81 in the front-rear direction, i.e., the Y-axis direction, with a tool or a hand.
By removing the connecting pin 81, the transmission unit 60 and the electromagnetic operating mechanism unit 70 can be separated from each other, and the electromagnetic operating mechanism unit 70 can be safely replaced. Further, since the transmission unit 60 and the electromagnetic operation mechanism unit 70 can be separated from each other, the force from the electromagnetic operation mechanism unit 70 does not act on the mechanical operation mechanism unit 90, and thus, parts related to the electromagnetic operation mechanism unit 70, such as the mechanical operation mechanism unit 90, can be safely replaced.
When the circuit breaker 1 is in the tripped state, the opening 97 of the frame 91 is exposed from the opening 97 only a part of the connecting pin 81 when viewed in the axial direction of the connecting plate 62 as shown in fig. 4. In the electromagnetic operation mechanism unit 70, the drive shaft 74 is held in a state of extending in the vertical direction while supplying the current to the coil 72.
Therefore, the drive shaft 74 moves in the vertical direction while only a part of the coupling pin 81 is exposed from the opening 97 when viewed in the axial direction of the coupling plate 62, from the trip state shown in fig. 4 to the on completion state shown in fig. 5 by the current supply to the coil 72.
That is, the circuit breaker 1 does not have all of the coupling pins 81 exposed from the openings 97 when viewed in the axial direction of the coupling plate 62 until the circuit breaker is in the on state from the trip state. Therefore, the connecting pin 81 cannot be removed from the tripped state until the on state is reached.
The distance between the frame 91 and the coupling pin 81 in the Y-axis direction is set to a length at which the coupling of the coupling pin 81, the coupling link 83, and the drive shaft 74 is not released. For example, as shown in fig. 11, the distance D1 between the coupling pin 81 and the frame 91 is set shorter than the depth D2 of the coupling hole 77.
Accordingly, even when the coupling pin 81 is not provided with a hook for preventing the coupling pin 81 from coming off, the coupling pin 81 can be prevented from coming off the drive shaft 74 during the opening and closing operation, and the circuit breaker 1 can be prevented from becoming inoperative. The connection relationship between the drive shaft 74 and the connection pin 81 is not limited to the example shown in fig. 11, as long as the distance D1 between the connection pin 81 and the frame 91 is set so that the connection pin 81 does not fall off from one of the drive shaft 74 and the connection link 83.
In the case where the clip is attached to the coupling pin 81 and the coupling pin 81 is held by the clip, a dedicated tool is required for the replacement work of the electromagnetic operating mechanism portion 70 and the like, or the space in the frame 91 is small, and therefore, the removal and attachment of the clip may be difficult. On the other hand, even when the clasp is not attached to the coupling pin 81, the coupling pin 81 can be prevented from coming off the drive shaft 74 during the opening and closing operation, and the replacement operation of the electromagnetic operating mechanism portion 70 and the like can be facilitated.
When the circuit breaker 1 is in the tripped state, as shown in fig. 4, only a part of the coupling pin 81 is exposed from the opening 97 formed in the frame 91 when viewed in the axial direction of the coupling plate 62. In the state shown in fig. 4, the connecting pin 95 is locked to the frame 91, and the connecting plate 62 is not urged in the counterclockwise direction by the disconnecting spring 92.
Therefore, in the state shown in fig. 4, no force acts on the drive shaft 74 in the left-right direction. From the state shown in fig. 4, the drive shaft 74 is pressed rightward by a tool or a hand, whereby the entire coupling pin 81 can be exposed from the frame 91 as shown in fig. 12. This enables the connection pin 81 to be removed.
In the case where the drive shaft 74 is driven by the electromagnetic operating mechanism 70, the 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 inclined with respect to the vertical direction. That is, the circuit breaker 1 may be configured such that the driving shaft 74 is inclined leftward with respect to the vertical direction by the force of the opening spring 92 in a state where the driving shaft 74 is driven by the electromagnetic operation mechanism portion 70. In this case, the opening 97 of the frame 91 may be formed so that the entire coupling pin 81 is exposed from the opening 97 when viewed in the axial direction of the coupling plate 62 without tilting the drive shaft 74 with respect to the vertical direction.
In the above description, the drive shaft 74 is inclined leftward with respect to the vertical direction by the force of the off spring 92, which is a spring member, but a leftward force may be applied to the drive shaft 74 by a biasing member other than a spring member. The biasing member other than the opening spring 92 is an elastic member such as rubber, for example.
In the above description, the transmission unit 60 and the electromagnetic operation mechanism unit 70 are coupled by the coupling pins 81 and 82 and the coupling link 83, but the configuration of the coupling unit 80 is not limited to the above example. For example, the circuit breaker 1 may be configured such that the transmission unit 60 and the electromagnetic operation mechanism unit 70 are coupled to each other by a coupling unit 80 including a plurality of coupling links. In this case, the opening 97 is formed so that at least 1 connecting pin of the plurality of connecting links and the opening 97 are in the relationship of the connecting pin 81 and the opening 97 described above. The opening 97 may be formed so that the relationship between the plurality of coupling pins and the opening 97 is the relationship between the coupling pin 81 and the opening 97.
Further, in the breaker 1 described above, the shaft 64 is fixed to the connecting plate 62, but the breaker 1 may be configured such that the shaft 64 is fixed to the frame 91 and the connecting plate 62 is rotatably attached to the shaft 64 about the shaft center 65.
The transmission unit 60 is not limited to the above configuration. For example, the transmission unit 60 may be configured such that the movable element 30 is coupled to the tip end of 1 rotating member that rotates about the axial center 65. For example, the circuit breaker 1 may be configured such that the other end portion 612 of the operation arm 61 is rotatably attached to the shaft 64 around the shaft center 65 without providing the link plate 62. The transmission unit 60 may be configured to include 1 or more link members between the operation arm 61 and the connecting plate 62.
Further, the circuit breaker 1 is configured such that the operation arm 61 and the movable element 30 are directly coupled to each other, but may be configured such that 1 or more members are interposed between the operation arm 61 and the movable element 30 to indirectly couple the operation arm 61 and the movable element 30 to each other.
In the breaker 1, the connecting plate 62 is inclined in the left direction with respect to the vertical direction by the force of the opening spring 92, but the direction inclined by the force of the opening spring 92 is not limited to the left direction, and may be the right direction. In this case, the drive shaft 74 is pressed leftward by a tool or a hand, and the opening 97 is disposed so that the entire coupling pin 81 is exposed from the opening 97 when viewed in the axial direction of the coupling plate 62.
As described above, the circuit breaker 1 according to embodiment 1 includes: a power supply side fixed conductor 10 as a fixed member having a fixed contact 10 a; a movable element 30 having a movable contact 30 a; a transmission section 60; an electromagnetic operating mechanism portion 70; a connecting portion 80; a breaking spring 92 and a frame 91 as a pre-tightening means. The transmission unit 60 includes a coupling plate 62 as an example of a rotating member, and moves the movable element 30 with the rotation of the coupling plate 62 to bring the fixed contacts 10a into contact with and separate the movable contacts 30a from each other. The electromagnetic operating mechanism 70 has a drive shaft 74, and linearly moves the drive shaft 74. The coupling portion 80 couples the transmission portion 60 and the drive shaft 74, and rotates the coupling plate 62 in accordance with the movement of the drive shaft 74. The opening spring 92 applies a force to the linking plate 62 in a counterclockwise direction, which is a rotational direction for separating the movable contact 30a from the fixed contact 10 a. The frame 91 covers at least a part of the coupling pin 81 of the coupling portion 80 in the axial direction of the coupling plate 62 so as to face at least a part of the coupling pin 81, which is an example of a coupling member coupled to the drive shaft 74 in the coupling portion 80, in a state where the coupling plate 62 is inclined in the 1 st direction, which is one of the left and right directions with respect to the vertical direction, by the force of the release spring 92. This prevents the connecting pin 81 from coming off during the closing operation and the tripping operation of the circuit breaker 1, and prevents the circuit breaker 1 from becoming inoperative due to the coming off of the connecting pin 81. The frame 91 has an opening 97 at a position where the entire coupling pin 81 is exposed when viewed in the axial direction of the coupling plate 62 in a state where the drive shaft 74 is inclined in the 2 nd direction opposite to the 1 st direction with respect to the vertical direction. Thus, for example, when the circuit breaker 1 is in the state shown in fig. 6, the entire coupling pin 81 can be exposed by moving the drive shaft 74 in the right direction, and the replacement operation of the electromagnetic operating mechanism unit 70 and the like can be facilitated.
The frame 91 covers at least a part of the coupling pin 81 in a state where the drive shaft 74 is not inclined with respect to the vertical direction. Thus, even when the drive shaft 74 is not inclined with respect to the vertical direction during the closing operation and the tripping operation, the connecting pin 81 can be prevented from coming off.
The transmission unit 60 includes an operation arm 61 as an example of an arm member, the other end 612 of the operation arm 61 is rotatably connected to a connecting plate 62 as an example of a plate member that rotates around the shaft center 65, and the movable element 30 is connected to the one end 611. The opening spring 92 is bridged between the frame 91 and the linking plate 62. The coupling portion 80 couples the coupling plate 62 and the drive shaft 74. Thus, the drive shaft 74 can be urged in a direction intersecting the vertical direction by the opening spring 92 of the mechanical operation mechanism portion 90, and an increase in the number of components constituting the circuit breaker 1 can be suppressed as compared with a case where a separate biasing member is provided.
The configuration described in the above embodiment is an example of the content of the present invention, and may be combined with other known techniques, and a part of the configuration may be omitted or modified without departing from the scope of the present invention.
Description of the reference numerals
1 circuit breaker, 2 frame, 3 insulating wall, 4, 5 space portion, 6 wall portion, 7 mounting table, 8 through hole, 9 locking member, 10 power source side fixed conductor, 10a fixed contact, 20 load side fixed conductor, 30 movable piece, 30a movable contact, 40 flexible conductor, 50 holder, 51 press-contact spring, 52 movable piece pin, 60 transmission portion, 61 operating arm, 62 connecting plate, 63 link pin, 64 shaft, 65 shaft center, 66 engaging portion, 70 electromagnetic operating 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 connecting pin, 83 connecting link, 84, 85 connecting hole, 90 mechanical operating mechanism portion, 91 frame, 92 disconnecting spring, 93 tripping bar, 94 latch, 97 opening, 101, 201, 301, 401, 611, 621, 97 opening, 9 opening, 1 opening, 3 opening, 9 opening, connecting portion, 9 opening, 9, 921 one end and the other end 102, 202, 302, 402, 612, 622, 922.
Claims (3)
1. A circuit breaker, comprising:
a fixed member having a fixed contact;
a movable member having a movable contact;
a transmission unit having a rotating member, the transmission unit moving the movable element with rotation of the rotating member to bring the fixed contact into contact with and separate the movable contact from the fixed contact;
an electromagnetic operation mechanism unit having a shaft and linearly moving the shaft;
a coupling portion that couples the transmission portion and the shaft, and rotates the rotating member in accordance with movement of the shaft;
a biasing member that applies a force to the rotating member in a rotational direction in which the movable contact is isolated from the fixed contact; and
a frame that covers at least a part of a coupling pin coupled to the shaft in the coupling portion in an axial direction of the rotating member in a state where the shaft is inclined in a 1 st direction with respect to a moving direction of the shaft by a force of the pretensioner member,
the frame has an opening at a position where the entire coupling pin is exposed when viewed in the axial direction in a state where the shaft is inclined in a 2 nd direction opposite to the 1 st direction with respect to the moving direction.
2. The circuit breaker of claim 1,
the frame covers at least a part of the coupling pin in a state where the shaft is not inclined with respect to the moving direction.
3. The circuit breaker according to claim 1 or 2,
the rotating member is a plate member that rotates about an axis,
the transmission section has an arm member having one end portion to which the movable member is coupled and the other end portion rotatably coupled to the plate member,
the pre-tightening component is a spring component which is erected on the frame and the plate component,
the coupling portion couples the plate member and the shaft.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/027034 WO2019021385A1 (en) | 2017-07-26 | 2017-07-26 | Breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111095467A true CN111095467A (en) | 2020-05-01 |
| CN111095467B CN111095467B (en) | 2021-12-07 |
Family
ID=65041312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780093368.9A Active CN111095467B (en) | 2017-07-26 | 2017-07-26 | Circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6661058B2 (en) |
| CN (1) | CN111095467B (en) |
| TW (1) | TWI651746B (en) |
| WO (1) | WO2019021385A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542274B1 (en) * | 1991-11-13 | 1995-07-19 | Mitsubishi Denki Kabushiki Kaisha | Reset mechanism for a small-power tripping device for a circuit breaker |
| JP2004063248A (en) * | 2002-07-29 | 2004-02-26 | Nitto Electric Works Ltd | Circuit breaker |
| US20090255788A1 (en) * | 2008-04-15 | 2009-10-15 | Soundararajan Narayanasamy | spring discharge mechanism for circuit breaker |
| JP4578433B2 (en) * | 2005-07-21 | 2010-11-10 | 三菱電機株式会社 | Breaker |
| JP4591871B2 (en) * | 2005-12-19 | 2010-12-01 | 株式会社高岳製作所 | High pressure switch |
| JP4951597B2 (en) * | 2008-08-11 | 2012-06-13 | 株式会社日立製作所 | Breaker |
| TW201249038A (en) * | 2011-05-27 | 2012-12-01 | Mitsubishi Electric Corp | Drawer type circuit breaker |
| CN104715978A (en) * | 2013-12-16 | 2015-06-17 | Ls产电株式会社 | Withdrawable-type circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU226013B1 (en) * | 2001-03-29 | 2008-02-28 | Ge Power Controls Polska Sp Z | Circuit breaker thermal magnetic trip unit |
-
2017
- 2017-07-26 JP JP2019532261A patent/JP6661058B2/en active Active
- 2017-07-26 CN CN201780093368.9A patent/CN111095467B/en active Active
- 2017-07-26 WO PCT/JP2017/027034 patent/WO2019021385A1/en active Application Filing
-
2018
- 2018-03-08 TW TW107107893A patent/TWI651746B/en active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542274B1 (en) * | 1991-11-13 | 1995-07-19 | Mitsubishi Denki Kabushiki Kaisha | Reset mechanism for a small-power tripping device for a circuit breaker |
| JP2004063248A (en) * | 2002-07-29 | 2004-02-26 | Nitto Electric Works Ltd | Circuit breaker |
| JP4578433B2 (en) * | 2005-07-21 | 2010-11-10 | 三菱電機株式会社 | Breaker |
| JP4591871B2 (en) * | 2005-12-19 | 2010-12-01 | 株式会社高岳製作所 | High pressure switch |
| US20090255788A1 (en) * | 2008-04-15 | 2009-10-15 | Soundararajan Narayanasamy | spring discharge mechanism for circuit breaker |
| JP4951597B2 (en) * | 2008-08-11 | 2012-06-13 | 株式会社日立製作所 | Breaker |
| TW201249038A (en) * | 2011-05-27 | 2012-12-01 | Mitsubishi Electric Corp | Drawer type circuit breaker |
| CN104715978A (en) * | 2013-12-16 | 2015-06-17 | Ls产电株式会社 | Withdrawable-type circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6661058B2 (en) | 2020-03-11 |
| TWI651746B (en) | 2019-02-21 |
| JPWO2019021385A1 (en) | 2019-11-07 |
| TW201911357A (en) | 2019-03-16 |
| WO2019021385A1 (en) | 2019-01-31 |
| CN111095467B (en) | 2021-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2493038B1 (en) | Circuit breaker having cradle | |
| KR970007515B1 (en) | Circuit breaker | |
| KR102108894B1 (en) | Relay | |
| KR101904350B1 (en) | Vacuum circuit breaker assembly | |
| US20090065340A1 (en) | Safety switch | |
| JP4332746B2 (en) | Electromagnetic operation device | |
| CN111095467B (en) | Circuit breaker | |
| EP3343710B1 (en) | Position indicator of air circuit breaker | |
| CN103367066B (en) | The external solution buckle device of circuit-breaker | |
| KR101168083B1 (en) | Door lock apparatus and circuit breaker using the same | |
| CN108987194B (en) | Circuit breaker and safety device unit of circuit breaker | |
| US11898369B2 (en) | Door lock | |
| JP2007220526A (en) | Circuit breaker, and plunger retention device of circuit breaker | |
| CN103367062A (en) | External tripping device of circuit breaker | |
| KR100942224B1 (en) | Apparatus of control vacuum interrupter | |
| CN111433879B (en) | Contactor | |
| CN214705824U (en) | Relay button structure | |
| KR100876413B1 (en) | Circuit breaker having trip function connected with over current relay | |
| KR100566439B1 (en) | Mounting device for magnetic contactor | |
| CN113826182B (en) | Release type electromagnetic trip device | |
| KR20080006425A (en) | Electromagnetic contact apparatus using keys | |
| CN111226301B (en) | Circuit breaker | |
| JPS6244442Y2 (en) | ||
| EP2015334A2 (en) | Air cicuit breaker having simple detachable structure for over current relay | |
| JP6010983B2 (en) | Circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |