CN115116803B - Circuit breaker operating mechanism and circuit breaker - Google Patents
Circuit breaker operating mechanism and circuit breakerInfo
- Publication number
- CN115116803B CN115116803B CN202210673854.0A CN202210673854A CN115116803B CN 115116803 B CN115116803 B CN 115116803B CN 202210673854 A CN202210673854 A CN 202210673854A CN 115116803 B CN115116803 B CN 115116803B
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- shaft
- circuit breaker
- lever
- side plate
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/52—Contacts adapted to act as latches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention provides a circuit breaker operating mechanism which comprises an energy storage mechanism, a driving mechanism and a side plate, wherein one end of the energy storage mechanism is fixed on the side plate, and the other end of the energy storage mechanism is connected with one end of the driving mechanism, and the circuit breaker operating mechanism is characterized in that: the driving mechanism is characterized by further comprising a connecting rod mechanism, the other end of the driving mechanism is connected with one end of the connecting rod mechanism, the other end of the connecting rod mechanism is connected with the moving contact, the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one ends of the first connecting rod, the second connecting rod and the third connecting rod are rotatably arranged on a second shaft, the other end of the first connecting rod is rotatably arranged on a first shaft of the side plate, the other end of the third connecting rod is arranged on a third shaft, and the other end of the second connecting rod is connected with the rotating shaft through a shaft. In the opening process of the operating mechanism, after the release rod releases the lever, the switching-on connecting rod system moves indefinitely due to the fact that the degree of freedom is larger than the number of driving forces, the switching-on connecting rod system moves certainly, the reliability of movement is guaranteed, the defect of an original switching-on system is overcome, a group of springs are added into the switching-on system, and in the switching-on process, the two groups of connecting rod systems work in parallel, the reliability of the system is improved, and meanwhile the action speed of the mechanism is accelerated.
Description
Technical Field
The invention belongs to the field of molded case circuit breakers, and particularly relates to a novel circuit breaker operating mechanism and a circuit breaker using the same.
Background
The circuit breaker is an important part in the distribution electrical equipment and is used for a low-voltage power system, wherein an operating mechanism is an important component structure of the circuit breaker, the mechanism can drive a contact part to carry out opening and closing operations through a certain transmission device and can be matched with other protection devices, a circuit is cut off when a circuit breaks down, and the circuit or electric equipment is protected from being lost. When the circuit breaker is large in size, a mechanism design capable of storing energy is adopted, and energy is stored and released through an internal spring, so that the moving contact and the fixed contact of the circuit breaker are contacted or separated to complete the switching-on and switching-off operation.
In the opening or closing process of the circuit breaker, as the movable parts such as the contact and the like have certain movement inertia, rebound easily occurs after the movable parts move to the limit position and contact with the limiting device. In the large-current tripping process, the moving contact spring back will cause the electric gap to become smaller, which is unfavorable for the rapid extinction of the electric arc and reduces the product performance. The spring back problem of the contact needs to be solved in addition to the normal operation characteristics in the design of the mechanism.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention aims to provide the breaker operating mechanism which can be operated by adopting an energy storage structure, can lock the contact part in both a closing state and a separating state, prevents the abnormal movement of the contact, and has high overall action speed and high breaking capacity.
In order to achieve the above object, the present invention provides a circuit breaker operating mechanism, comprising an energy storage mechanism, a driving mechanism and a side plate, wherein one end of the energy storage mechanism is fixed on the side plate, and the other end of the energy storage mechanism is connected with one end of the driving mechanism, and the circuit breaker operating mechanism is characterized in that: the driving mechanism is characterized by further comprising a connecting rod mechanism, the other end of the driving mechanism is connected with one end of the connecting rod mechanism, the other end of the connecting rod mechanism is connected with the moving contact, the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one ends of the first connecting rod, the second connecting rod and the third connecting rod are rotatably arranged on a second shaft, the other end of the first connecting rod is rotatably arranged on a first shaft of the side plate, the other end of the third connecting rod is arranged on a third shaft, and the other end of the second connecting rod is connected with the rotating shaft through a shaft.
The breaker operating mechanism further comprises second springs symmetrically arranged at two ends of the second shaft, one ends of the second springs are clamped in grooves at two ends of the second shaft, and the other ends of the second springs are connected with the side plates or connecting columns on the side plates.
In the breaker operating mechanism, the first connecting rod, the second connecting rod and the third connecting rod are formed by cold stamping of a metal plate, and two ends of the first connecting rod, the second connecting rod and the third connecting rod are provided with round holes.
In the circuit breaker operating mechanism, the driving mechanism comprises a driving rod, a first lever, an upper connecting rod, a lower connecting rod, a cantilever, a tripping rod and a double-knife lever, wherein the driving rod is rotatably arranged on the side plate through a first rotating shaft, one end of the driving rod is connected with the energy storage mechanism through a first shaft, the other end of the driving rod is matched with the upper connecting rod and can drive the upper connecting rod to move, the first lever is rotatably arranged on the side plate, the tail part of the first lever is in pin joint with the upper connecting rod, the end part of the first lever is matched with one end of the double-knife lever, the other end of the double-knife lever is in pin joint with the tripping rod, one end of the upper connecting rod is in pin joint with the first lever and can rotate around an axis, the other end of the upper connecting rod is in pin joint with one end of the lower connecting rod, and the other end of the lower connecting rod is in pin joint with the cantilever on a second rotating shaft, and the second rotating shaft is rotatably arranged on the side plate.
In the circuit breaker operating mechanism, the driving mechanism further comprises first springs symmetrically arranged at two ends of the second shaft, and the other ends of the first springs are hung on the shaft above the first springs.
In the breaker operating mechanism, the first spring and the second spring are tension springs.
Another object of the present invention is to provide a circuit breaker including the circuit breaker operating mechanism.
Compared with the prior art, the breaker operating mechanism has the following technical effects:
1) The upper connecting rod and the lower connecting rod in the switching-on connecting rod system of the operating mechanism pass through dead points for a certain angle, form a stable state after switching-on, and cannot be opened when the contact has a larger counter force to the rotating shaft after switching-on.
2) The main shaft cantilever and the connecting rod in the brake-separating connecting rod system form a stable system in a brake-separating state, the cantilever and the connecting rod pass through dead points by a certain angle, and the main shaft cantilever and the connecting rod are locked after the contact system is opened, so that the contact system is prevented from falling back.
3) In the brake separating process, after the release rod releases the lever, the brake connecting rod system moves indefinitely due to the fact that the degree of freedom is larger than the number of driving forces, and the brake separating connecting rod system moves certainly, so that the reliability of movement is guaranteed, and the defect of an original brake closing system is overcome.
4) A group of springs are added into the brake separating system, and two groups of connecting rod systems work in parallel in the brake separating process, so that the reliability of the system is improved, and meanwhile, the action speed of a mechanism is increased.
Drawings
FIG. 1 is a schematic view of an operating mechanism in a brake-off state according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an operating mechanism in a closed state according to an embodiment of the present invention;
FIG. 3 is a schematic view of an operating mechanism according to an embodiment of the present invention in a brake release process;
FIG. 4 is a perspective view of an operating mechanism according to an embodiment of the present invention;
Sequence number:
1-base, 2-cover, 3-spindle, 4-moving contact, 5-spindle, 51-first spindle, 52-second spindle, 53-third spindle, 54-fourth spindle, 55-fifth spindle, 56-sixth spindle, 6-operating mechanism, 601-spring assembly, 602-drive lever, 603-first lever, 604-upper link, 605-lower link, 606-first spring, 607-double-knife lever, 608-trip lever, 609-second spindle, 610-cantilever, 611-first link, 612-second link, 613-third link, 614-first spindle, 615-second spring, 616-side plate, 7-stationary contact.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, the circuit breaker in one embodiment of the present invention includes a base 1, a cover 2, a rotating shaft 3, a moving contact 4, a fixed contact 7, and an operating mechanism 6. The cover 2 is mounted on the base 1, and the operating mechanism 6 is mounted on the cover 2. A first shaft 3 is mounted in a space formed by the base 1 and the cover 2, and the first shaft 3 is rotatable about an axis thereof. The moving contact 4 is installed on the first rotating shaft 3, the fixed contact 7 is installed on the base 1, and the operating mechanism 66 drives the first rotating shaft 3 to rotate so as to drive the moving contact 4 to rotate, so that the moving contact 4 is separated from or contacted with the fixed contact 7, and the opening/closing operation of the circuit breaker is realized.
The operating mechanism 6 in the specific embodiment of the invention comprises an energy storage mechanism, a driving mechanism, a connecting rod mechanism and a side plate, one end of the energy storage mechanism 601 is fixed on the side plate 616, the other end of the energy storage mechanism 601 is connected with one end of the driving mechanism, the other end of the driving mechanism is connected with one end of the connecting rod mechanism, and the other end of the connecting rod mechanism is connected with the moving contact. One end of the energy storage mechanism 601 is fixed on the side plate 616, the other end of the energy storage mechanism 601 is connected with one end of the driving rod 602 through the first shaft 51, so that energy storage and energy release operation can be performed, the upper connecting rod 604 can be driven to rotate, and the energy storage mechanism in the invention is a spring assembly.
The drive mechanism in the embodiment of the present invention includes a drive rod 602, a first lever 603, an upper link 604, a lower link 605, a cantilever 610, a trip bar 608, and a double-knife lever 607. The driving rod 602 is rotatably mounted on the side plate 616 through a first shaft 614, one end of the driving rod 602 is connected with the energy storage mechanism 601 through the first shaft 51, and the other end of the driving rod 602 is matched with the upper connecting rod 604 to drive the upper connecting rod 604 to move. The first lever 603 is rotatably mounted on the side plate 616, the tail of the first lever 603 is pinned with the upper link 604, and the end of the first lever 603 mates with one end of the double knife lever 607. The double knife lever 607 is rotatably mounted on the side plate 616, and the other end of the double knife lever 607 is engaged with the trip bar 608. One end of the upper link 604 is pinned to the first lever 603, and the other end of the upper link 604 is pinned to one end of the lower link 605. The other end of the lower link 605 is pinned to one end of the cantilever 610 on the second shaft 609, and the other end of the cantilever 610 is simultaneously connected to the third link 613, and the second shaft 609 is rotatably mounted on the side plate 616. The first springs 606 are respectively mounted on both ends of the fourth shaft 54, and the other ends of the first springs 606 are hung on shafts mounted on the side plates 616, so that the second rotary shaft 609 is directly driven to rotate during opening.
The link mechanism in the invention comprises two groups of first links 611, a second link 612 and a third link 613, wherein one end of the first link 611 is rotatably mounted on the sixth shaft 56, the other end of the first link 611, one end of the second link 612 and one end of the third link 613 are rotatably or movably mounted on the second shaft 52, wherein the third link 613 is positioned at one side close to the side plate, the second link 612 is positioned between the first link 611 and the third link 613, the other end of the third link 613 is rotatably mounted on the third shaft 53, and the other end of the second link 612 is mounted on the fifth shaft 55 and can drive the rotating shaft 3 to move. A second spring 615 is installed at both ends of the second shaft 52, and the other end of the second spring 615 is installed on the side plate 616 or the connecting post of the side plate 616, and the second spring 615 can directly drive the third connecting rod 613 to move during the opening process.
The switching-on process of the operating mechanism comprises the steps that after the energy storage mechanism 601 stores energy, the energy storage mechanism is in a compressed state, the tripping rod 608 locks the double-knife lever 607, the double-knife lever 607 locks the first lever 603, the moving contact 4 and the fixed contact 7 are in an open state, the energy storage mechanism 601 pushes the driving rod 602 to rotate, the driving rod 602 contacts with the upper connecting rod 604 and then drives the upper connecting rod 604 to move, the lower connecting rod 605 drives the second rotating shaft 609 to rotate, the second rotating shaft 609 drives the third connecting rod 613 and the first connecting rod 611 through the cantilever 610, the second connecting rod 612 moves, and the second connecting rod 612 drives the rotating shaft 3 to move. When the moving contact 4 contacts with the fixed contact 7, the moving contact 7 rotates relative to the rotating shaft 3 to generate final pressure, and the upper connecting rod 604 and the lower connecting rod 605 in the closing connecting rod system move to dead points, at this time, the first rotating shaft 3 reaches the maximum rotating angle. After the dead point is crossed by a certain angle, the movement is stopped, and at the moment, the rotating shaft 3 and the moving contact 4 move to the closing position. Because the upper link 604 and the lower link 605 pass the dead point position, the contact reaction force cannot open the operating mechanism 6, and the operating mechanism is in a stable state, and the closing process is completed.
The opening process of the operating mechanism comprises the steps that a tripping rod 608 releases a double-knife lever 607, the double-knife lever 607 rotates for a certain angle and then releases a first lever 603, a lower connecting rod 605 drives an upper connecting rod 604 and the first lever 603 to rotate along a rotation axis under the action of a first spring 606, at the moment, the angle of the upper connecting rod 604 relative to the lower connecting rod 605 is changed, and after dead points are passed, the upper connecting rod 604 and the lower connecting rod 605 are unlocked. Closing connecting rod system at this time the degree of freedom is greater than the driving force. The lower link 605 drives the second shaft 609 to rotate. When the first lever 603 is released and the rotating shaft 3 starts to rotate, the brake separating link system synchronously starts to move, and the brake separating link system always has determined movement and moves under the drive of the second spring 615, the two sets of link systems are mutually matched, and the rotating shaft 3 is driven to move for brake separation under the action of the second link 612. The rotating shaft 3 reaches the maximum opening angle after the third connecting rod 613 and the cantilever 610 are collinear, in the continuous movement process, the third connecting rod 613 and the cantilever 610 pass through a dead point for a certain angle, the movement of the cantilever 610 and the third connecting rod 613 is terminated after the limiting surface is reached, at this time, the rotating shaft 3 is locked at a certain fall-back position relative to the maximum opening position by the opening connecting rod system, the rotating shaft 3 can not rotate towards the closing direction except for closing operation, after the energy storage mechanism 601 stores energy, the tripping rod 608, the first lever 603 and the double-knife lever 607 are reset, the system is restored to the initial state, and one working cycle is completed.
While the principles and embodiments of the present invention have been described in detail in the foregoing application, the foregoing embodiments are provided to facilitate understanding of the principles and concepts of the invention and are further provided herein by way of example only, and are not to be construed as limiting the invention to any extent possible, as long as the principles and embodiments of the invention are modified in light of the teachings of the invention.
Claims (5)
1. The circuit breaker operating mechanism comprises an energy storage mechanism, a driving mechanism and a side plate, wherein one end of the energy storage mechanism is fixed on the side plate, the other end of the energy storage mechanism is connected with one end of the driving mechanism, the circuit breaker operating mechanism is characterized by further comprising a connecting rod mechanism, the other end of the driving mechanism is connected with one end of the connecting rod mechanism, the other end of the connecting rod mechanism is connected with a moving contact, the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one ends of the first connecting rod, the second connecting rod and the third connecting rod are rotatably arranged on a second shaft, the other end of the first connecting rod is rotatably arranged on a sixth shaft of the side plate, the other end of the third connecting rod is arranged on a third shaft, and the other end of the second connecting rod is connected with a rotating shaft through a fifth shaft;
The second springs are symmetrically arranged at two ends of the second shaft, one ends of the second springs are clamped in grooves at two ends of the second shaft, and the other ends of the second springs are connected with the side plates or connecting columns on the side plates;
The driving mechanism comprises a driving rod, a first lever, an upper connecting rod, a lower connecting rod, a cantilever, a tripping rod and a double-knife lever, wherein the driving rod is rotatably arranged on the side plate through a first rotating shaft, one end of the driving rod is connected with the energy storage mechanism through the first shaft, the other end of the driving rod is matched with the upper connecting rod to drive the upper connecting rod to move, the first lever is rotatably arranged on the side plate, the tail of the first lever is in pin joint with the upper connecting rod, the end part of the first lever is matched with one end of the double-knife lever, the other end of the double-knife lever is matched with the tripping rod, one end of the upper connecting rod is in pin joint with the first lever and can rotate around the axis, the other end of the upper connecting rod is in pin joint with one end of the lower connecting rod, the other end of the lower connecting rod is in pin joint with a cantilever on the second rotating shaft, and the second rotating shaft is rotatably arranged on the side plate;
the driving mechanism further comprises first springs symmetrically arranged at two ends of the fourth shaft, and the other ends of the first springs are hung on the shaft above the first springs.
2. The circuit breaker operating mechanism of claim 1, wherein the first, second and third links are all cold stamped from a sheet metal, and a circular hole is provided at each end of the first, second and third links.
3. The circuit breaker operating mechanism of claim 1 wherein the second spring is a tension spring.
4. The circuit breaker operating mechanism of claim 1 wherein the first spring is a tension spring.
5. A circuit breaker comprising a circuit breaker operating mechanism according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210673854.0A CN115116803B (en) | 2022-06-15 | 2022-06-15 | Circuit breaker operating mechanism and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210673854.0A CN115116803B (en) | 2022-06-15 | 2022-06-15 | Circuit breaker operating mechanism and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115116803A CN115116803A (en) | 2022-09-27 |
| CN115116803B true CN115116803B (en) | 2025-11-21 |
Family
ID=83328683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210673854.0A Active CN115116803B (en) | 2022-06-15 | 2022-06-15 | Circuit breaker operating mechanism and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115116803B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217507243U (en) * | 2022-06-15 | 2022-09-27 | 北京北元电器有限公司 | Circuit breaker operating device and circuit breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022061B (en) * | 2007-03-20 | 2010-06-23 | 浙江正泰电器股份有限公司 | Air circuit breaker with permanent magnetic operating mechanism |
| CN207474399U (en) * | 2017-11-28 | 2018-06-08 | 常熟开关制造有限公司(原常熟开关厂） | A kind of push and pull system of circuit breaker operation mechanism |
| CN113611582A (en) * | 2021-08-11 | 2021-11-05 | 伊顿电气有限公司 | Molded case circuit breaker |
-
2022
- 2022-06-15 CN CN202210673854.0A patent/CN115116803B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217507243U (en) * | 2022-06-15 | 2022-09-27 | 北京北元电器有限公司 | Circuit breaker operating device and circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115116803A (en) | 2022-09-27 |
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