CN220753340U - Operating mechanism of circuit breaker - Google Patents
Operating mechanism of circuit breaker Download PDFInfo
- Publication number
- CN220753340U CN220753340U CN202322308109.9U CN202322308109U CN220753340U CN 220753340 U CN220753340 U CN 220753340U CN 202322308109 U CN202322308109 U CN 202322308109U CN 220753340 U CN220753340 U CN 220753340U
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- lever
- buffer device
- operating mechanism
- handle
- circuit breaker
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- 230000007246 mechanism Effects 0.000 title claims abstract description 41
- 238000013016 damping Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The utility model provides a handle lever, jump knot lever, hasp lever, go up connecting rod, lower connecting rod, common axle, pivot, public pivot, handle lever, jump knot lever and hasp lever rotate and set up on the curb plate, handle lever drive jump knot lever rotate make its with the hasp lever contact locking, go up connecting rod and lower connecting rod through public axle pivot connection, the pivot is connected through public pivot with lower connecting rod to realize rotating through the motion of lower connecting rod, characteristics are: the operating mechanism further comprises a buffer device, wherein the buffer device is arranged at the rear part of the handle lever moving towards the opening direction of the breaker and is used for enabling the handle lever to be contacted with the buffer device before being contacted with the trip lever. The advantages are that: the buffer device absorbs the partial impact capacity of the handle lever to the trip lever, reduces the abrasion degree of the trip lever, ensures the reliability of the trip lock buckle, and improves the mechanical life of the molded case circuit breaker.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to an operating mechanism of a circuit breaker.
Background
The main functional components of the circuit breaker comprise a contact system, an operating mechanism, a tripping device, a handle and a rotating shaft, when the tripping device of the circuit breaker detects abnormal current of a circuit, the operating mechanism is actuated to unlock and trip, and the moving and static contacts in the contact system are separated from each other to break fault current in the circuit, so that the purpose of protecting the circuit is achieved; when the circuit fault is removed, firstly, the circuit breaker is subjected to re-buckling operation to reset the operating mechanism, and then the switching-on operation is carried out, so that the circuit is completed again. The operating mechanism of the conventional low voltage circuit breaker is various and generally includes a handle lever, a main spring, a trip lever, a latch lever, and a rotating shaft. The operating mechanism adopts force transmission between the connecting rods to realize the closing and separating of the moving contact and realizes the purpose of tripping through the conversion between the four connecting rods and the five connecting rods of the operating mechanism.
However, in the prior art, during the breaking process of the circuit breaker, the process that the handle lever collides with the trip lever exists, and the trip lever is easy to wear or even damage due to overlarge impact force. In addition, the trip lever and the latch lever also have an impact process of separating and then contacting, in the impact process, the latch lever and even the traction rod can undergo larger elastic deformation, so that deviation of the trip lever and the latch position of the latch lever is likely to be caused, the reliability of the trip latch is affected, and even the matching failure is seriously caused, namely, the circuit breaker cannot be kept in a separated state but enters a tripped state.
In view of the above-described prior art, there is a need for a reasonable improvement in the structure of the operating mechanism of the existing circuit breaker. To this end, the applicant has made an advantageous design, and the technical solutions described below are produced in this context.
Disclosure of Invention
The utility model aims to provide an operating mechanism of a circuit breaker, which is additionally provided with a buffer device, so that the impact capacity of a handle lever to a trip lever is absorbed, the abrasion degree of the trip lever is reduced, the reliability of a trip lock buckle is ensured, and the mechanical life of a molded case circuit breaker is prolonged.
The utility model accomplishes the task like this, an operating mechanism of the circuit breaker, including the curb plate, lever of the hand grip, jump the lever, lock catch lever, upper link, lower link, public axle, spindle, public pivot, said lever of the hand grip, jump the lever of the lock catch and lock catch lever rotate and set up on the curb plate, the said lever of the hand grip drives and jumps the lever of the lock catch to rotate and make it contact with lock catch lever and lock, said upper link and lower link are connected through the pivot of the public axle, said spindle is connected through the public pivot with lower link, and realize rotating through the movement of the lower link, the characteristic is: the operating mechanism further comprises a buffer device, wherein the buffer device is arranged at the rear of the handle lever moving towards the opening direction of the breaker and is used for enabling the handle lever to be contacted with the buffer device before being contacted with the trip lever.
In a specific embodiment of the present utility model, the handle lever includes a pair of handle side plates disposed opposite each other and an operation plate connected between the handle side plates, and the operation plate is configured to receive an external force to perform an operation.
In another specific embodiment of the present utility model, the buffering device is disposed on the side plate and corresponds to the position of the side plate of the handle.
In another specific embodiment of the present utility model, the buffer device is a pneumatic damping element, and comprises a movable ejector rod, a cylinder body and a return spring, wherein one end of the movable ejector rod protrudes out of the cylinder body, the other end of the movable ejector rod is located in the cylinder body, the return spring is arranged in the cylinder body, one end of the return spring is abutted against the bottom wall of the cylinder body, and the other end of the return spring is abutted against the ejector rod.
In still another specific embodiment of the present utility model, a through hole is formed in the bottom wall of the cylinder, and the hole diameter of the through hole is smaller than the inner diameter of the cylinder.
In a further specific embodiment of the utility model, the damping device is an oil damper.
In still another specific embodiment of the present utility model, the handle side plate is provided with a collision boss, and the collision boss is contacted with the buffer device before the handle lever contacts with the trip lever.
In a further specific embodiment of the present utility model, the handle side plate is provided with a collision boss, and the collision boss is contacted with the movable ejector rod of the buffer device before the handle lever is contacted with the trip lever.
The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: the buffer device is arranged at the rear of the handle lever moving towards the opening direction of the breaker and is used for enabling the handle lever to be in contact with the buffer device before the handle lever contacts with the trip lever, the buffer device absorbs the partial impact capacity of the handle lever to the trip lever, on one hand, the abrasion degree of the trip lever is reduced due to the reduction of the impact force, the probability of damage is greatly reduced, on the other hand, the interaction force between the trip lever and the latch lever is also greatly reduced, the possibility of false tripping in the opening process is reduced, the mechanical life of the molded case breaker is prolonged, and the problem in the prior art is solved.
Drawings
Fig. 1 is a schematic view of a state of an operating mechanism of the present utility model when a circuit breaker is in a closed state;
FIG. 2 is a schematic view of the operating mechanism of the present utility model after the main spring passes over dead center;
FIG. 3 is a schematic view of the operating mechanism of the present utility model when the handle lever is actuated by an external force to move the main spring past the dead point position.
In the figure: 1. the handle lever, 11, a handle side plate, 111, a collision boss, 12, an operation plate and 13, a main spring hanging shaft; 2. a trip lever; 3. a latch lever; 4. an upper connecting rod; 5. a lower connecting rod; 6. a common shaft; 7. a rotating shaft; 8. a common pivot axis; 9. the device comprises a buffer device, a movable ejector rod, a cylinder body, a through hole, a return spring and a spring, wherein the buffer device, the movable ejector rod, the cylinder body, the through hole and the return spring are arranged in sequence, and the buffer device, the movable ejector rod, the cylinder body, the through hole and the return spring are arranged in sequence; 10. a main spring; 20. a stationary contact; 30. and a moving contact.
Detailed Description
The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.
In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.
Referring to fig. 1 to 3, the present utility model relates to an operating mechanism of a circuit breaker, the circuit breaker includes a housing, a handle, a contact system, and the operating mechanism of the present utility model, the contact system further includes a moving contact 30 and a fixed contact 20. When the breaker is switched on and off, the handle drives the operating mechanism to act, and the operating mechanism drives the moving contact 30 to contact or separate from the fixed contact 20 through the rotating shaft 7, so that the contact system is realized.
The operating mechanism of the circuit breaker comprises a side plate (not shown in the figure) fixedly mounted on the circuit breaker housing. The operating mechanism also comprises a handle lever 1, a trip lever 2, a latch lever 3, an upper connecting rod 4, a lower connecting rod 5, a common shaft 6, a rotating shaft 7 and a common pivot shaft 8. The handle lever 1, the trip lever 2 and the latch lever 3 are all rotatably arranged on the side plate. The handle lever 1 is provided with a main spring hanging shaft 13. The upper link 4 and the lower link 5 are pivotally connected by a common shaft 6. A main spring 10 is arranged between the public shaft 6 and the handle lever 1, one end of the main spring 10 is hung on a main spring hanging shaft 13 of the handle lever 1, and the other end is hung on the public shaft 6. The rotating shaft 7 is connected with the lower connecting rod 5 through a common pivot shaft 8, and realizes rotation through the movement of the lower connecting rod 5. When the operating mechanism is in a closing state, the trip lever 2 is buckled and locked with the lock lever 3. When the opening operation is carried out, the handle lever 1 is driven to move, in the moving process of the handle lever 1, when the main spring hanging shaft 13 moves through two hinge shafts of the upper connecting rod 4 (dead point positions), the acting force of the main spring 10 on the upper connecting rod 4 is changed into the opening direction from the closing direction, the upper connecting rod 4 rotates anticlockwise, the driving mechanism moves in the opening direction, and then the moving contact 30 moves in the opening direction until the opening position. During the opening process of the operating mechanism, the common shaft 6 moves to the right side of the handle lever 1, at this time, the acting force direction of the main spring 10 on the handle lever 1 is changed from the counterclockwise direction to the clockwise direction, and the moment direction of the force pushing the handle lever 1 is the same. Under the action of the main spring 10, the handle lever 1 moves rapidly in the opening direction until the handle lever collides with the trip lever 2 to limit. In the collision process, the handle lever 1 generates impact force on the trip lever 2, so that the trip lock and the latch hasp of the operating mechanism are unstable, and the latch of the operating mechanism can be seriously failed to be shot.
In order to reduce the impact force of the handle lever 1 on the trip lever 2, the operating mechanism further comprises a buffer device 9, wherein the buffer device 9 is arranged at the rear of the handle lever 1 moving towards the breaker opening direction and is used for enabling the handle lever 1 to be contacted with the buffer device 9 before being contacted with the trip lever 2 so as to reduce the impact force of the handle lever 1 on the trip lever 2.
Specifically, the handle lever 1 includes a pair of handle side plates 11 disposed opposite to each other and an operation plate 12 connected between the handle side plates 11, and the operation plate 12 is configured to receive an external force to perform an operation. Preferably, in this embodiment, the buffer device 9 is disposed on the side plate, corresponding to the position of the handle side plate 11.
In this embodiment, the buffer device 9 is a pneumatic damping element, and includes a movable ejector rod 91, a cylinder 92, and a return spring 93, where one end of the movable ejector rod 91 protrudes from the cylinder 92, the other end is located in the cylinder 92, the return spring 93 is disposed in the cylinder 92, one end abuts against the bottom wall of the cylinder 92, and the other end abuts against the ejector rod 91.
Specifically, a through hole 921 is formed in the bottom wall of the cylinder 92, and the aperture of the through hole 921 is far smaller than the inner diameter of the cylinder 92. By the provision of this through hole 921, the resistance of the movable jack 91 can be adjusted. Of course, since it is difficult to achieve complete sealing of the cylinder 92 and the movable ram 91, it is also possible to provide no through hole 921, which can exhaust through the gap between the movable ram 91 and the cylinder 92.
The resistance force pushing the movable jack 91 is the resultant force of the return spring 93 and the gas resistance force. When the pushing speed is low, for example, within 10mm/s, the gas can be smoothly discharged, and the reaction force of the return spring 93 is mainly acted, and the force of the return spring 93 is set relatively small. When the pushing speed is high, for example, the impact is applied, the gas resistance is greater than the reaction force of the return spring 93, so that the characteristic of providing a variable output resistance according to the magnitude of the moving speed of the driving movable jack 91 is achieved.
The buffer means 9 may also be a spring, preferably a torsion spring.
The buffer device 9 may also be an oil buffer.
The handle side plate 11 is provided with a collision boss 111, and the collision boss 111 corresponds to the buffer device 9 in position. The shape of the collision boss 111 may be set arbitrarily, and the collision boss 111 is adapted to the movable ejector rod 91, that is, before the handle lever 1 contacts the trip lever 2, the collision boss 111 contacts the movable ejector rod 91 of the buffer device 9.
With continued reference to fig. 1 to 3, the operating mechanism of the present utility model has the following working principles:
as shown in fig. 1, the collision boss 111 is not in contact with the buffer device 9 when the circuit breaker is in the closing position.
As shown in fig. 3, when the handle lever 1 is driven to the right by an external force, the main spring 10 passes over the dead point position, and the collision boss 111 is arranged not to contact with the buffer 9, so that the maximum breaking force of the circuit breaker is not increased.
As shown in fig. 2, when the main spring 10 passes over the dead point, the handle lever 1 is not driven by external force, and the handle lever 1 can be driven to move towards the opening direction by virtue of the tension of the main spring 10, and due to the existence of the buffer device 9, the collision boss 111 contacts with the buffer device 9 first, then the handle lever 1 collides with the trip lever 2, the handle lever 1 is limited by the trip lever 2, and the trip lever 2 rotates to lock with the latch lever 3.
Before the handle lever 1 collides with the trip lever 2, the handle lever 1 is contacted with the buffer device 9 through the buffer device 9, so that the partial impact capacity of the handle lever 1 to the trip lever 2 is absorbed, on one hand, the abrasion degree of the trip lever 2 is reduced due to the reduction of the impact force, and the probability of damage is also greatly reduced; on the other hand, the interaction force between the trip lever 2 and the latch lever 3 is also greatly reduced, the possibility of false tripping in the opening process is reduced, and the mechanical life of the molded case circuit breaker is prolonged.
Claims (10)
1. The utility model provides an operating device of circuit breaker, includes curb plate, handle lever (1), jump knot lever (2), hasp lever (3), go up connecting rod (4), lower connecting rod (5), public axle (6), pivot (7), public pivot (8), handle lever (1), jump knot lever (2) and hasp lever (3) rotate and set up on the curb plate, handle lever (1) drive jump knot lever (2) rotate and make it contact locking with hasp lever (3), last connecting rod (4) and lower connecting rod (5) pass through public axle (6) pivot connection, pivot (7) and lower connecting rod (5) pass through public pivot (8) and be connected to realize rotating its characterized in that through the motion of lower connecting rod (5): the operating mechanism further comprises a buffer device (9), wherein the buffer device (9) is arranged at the rear of the handle lever (1) moving towards the opening direction of the breaker and is used for enabling the handle lever (1) to be contacted with the buffer device (9) before the handle lever (1) is contacted with the trip lever (2).
2. The operating mechanism of a circuit breaker according to claim 1, wherein: the handle lever (1) comprises a pair of handle side plates (11) which are arranged opposite to each other and an operation plate (12) connected between the handle side plates (11), wherein the operation plate (12) is used for receiving external force to realize operation.
3. The operating mechanism of a circuit breaker according to claim 2, wherein: the buffer device (9) is arranged on the side plate and corresponds to the position of the handle lever (1).
4. A circuit breaker operating mechanism according to claim 3, wherein: the buffer device (9) is a pneumatic damping element and comprises a movable ejector rod (91), a cylinder body (92) and a return spring (93), one end of the movable ejector rod (91) protrudes out of the cylinder body (92), the other end of the movable ejector rod is located in the cylinder body (92), the return spring (93) is arranged in the cylinder body (92), one end of the return spring is propped against the bottom wall of the cylinder body (92), and the other end of the return spring is propped against the ejector rod (91).
5. The operating mechanism of a circuit breaker of claim 4, wherein: a through hole (921) is formed in the bottom wall of the cylinder body (92), and the aperture of the through hole (921) is smaller than the inner diameter of the cylinder body (92).
6. A circuit breaker operating mechanism according to claim 3, wherein: the buffer device (9) is a spring.
7. The operating mechanism of a circuit breaker of claim 6, wherein: the buffer device (9) is a torsion spring.
8. A circuit breaker operating mechanism according to claim 3, wherein: the buffer device (9) is an oil buffer.
9. A circuit breaker operating mechanism according to claim 3, wherein: the handle side plate (11) is provided with a collision boss (111), and before the handle lever (1) is contacted with the trip lever (2), the collision boss (111) is contacted with the buffer device (9).
10. The operating mechanism of a circuit breaker of claim 4, wherein: the handle side plate (11) is provided with a collision boss (111), and before the handle lever (1) is contacted with the trip lever (2), the collision boss (111) is contacted with a movable ejector rod (91) of the buffer device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322308109.9U CN220753340U (en) | 2023-08-28 | 2023-08-28 | Operating mechanism of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322308109.9U CN220753340U (en) | 2023-08-28 | 2023-08-28 | Operating mechanism of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220753340U true CN220753340U (en) | 2024-04-09 |
Family
ID=90552773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322308109.9U Active CN220753340U (en) | 2023-08-28 | 2023-08-28 | Operating mechanism of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220753340U (en) |
-
2023
- 2023-08-28 CN CN202322308109.9U patent/CN220753340U/en active Active
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