CN111105949A - Electric spring mechanism and grounding switch - Google Patents
Electric spring mechanism and grounding switch Download PDFInfo
- Publication number
- CN111105949A CN111105949A CN201811270919.7A CN201811270919A CN111105949A CN 111105949 A CN111105949 A CN 111105949A CN 201811270919 A CN201811270919 A CN 201811270919A CN 111105949 A CN111105949 A CN 111105949A
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- CN
- China
- Prior art keywords
- energy storage
- spring mechanism
- output
- crank arm
- connecting lever
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3047—Power arrangements internal to the switch for operating the driving mechanism using spring motor adapted for operation of a three-position switch, e.g. on-off-earth
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
Abstract
The invention relates to an electric spring mechanism and a grounding switch. The earthing switch comprises a fracture structure and an electric spring mechanism for driving a switch contact to be switched on and switched off, the electric spring mechanism comprises a rack, an output shaft for driving a moving contact to move is assembled on the rack in a rotating mode, an output connecting lever is connected to the output shaft in a rotating mode, the electric spring mechanism comprises a driving motor, the driving motor is connected with at least two energy storage connecting levers which are coaxially arranged in a transmission mode, each energy storage connecting lever is connected with an energy storage spring, each energy storage connecting lever acts synchronously, and the output shaft is driven to rotate through driving the output connecting lever in an energy release process of the energy storage spring. When the special energy-storage combined electrical appliance switch is used, the driving motor drives each energy-storage crank arm to simultaneously act to compress the energy-storage springs, each energy-storage spring does work after the dead point to drive the output crank arm to rotate, the energy-storage springs do work together to obviously improve the operation power of the electric spring mechanism, the requirement of the large operation power of the ultra-high voltage closed combined electrical appliance switch can be met, and the operation reliability of the equipment is improved.
Description
Technical Field
The invention relates to an electric spring mechanism and a grounding switch.
Background
For the requirements of sustainable development and environmental protection, the power transmission and transformation in China develops rapidly, and particularly 1000KV ultrahigh voltage transmission is in the world leading level. The spring mechanism is a mechanical operating mechanism which takes an energy storage spring as an energy storage element. The spring mechanism comprises a manual spring mechanism and an electric spring mechanism, and the electric spring mechanism is used in the existing gas insulated metal enclosed switchgear, gas enclosed combined electrical appliance and high-voltage sulfur hexafluoride circuit breaker.
This kind of electronic spring mechanism among the prior art, as the utility model patent specification of patent publication No. CN204189691U discloses an electronic spring mechanism, including the installation frame, install actuating mechanism and output shaft on the installation frame, install first driven turning arm on the output shaft, the driven turning arm of second, assist turning arm (being equivalent to the output turning arm), main turning arm (being equivalent to the energy storage turning arm) and master gear, auxiliary gear and master gear meshing, main turning arm has the spring seat of honour through the pin junction, install the spring seat of honour through installation cover and round pin in the installation frame, install drive spring between spring seat of honour and the seat of honour. When the electric spring mechanism is used for switching on and off, the driving mechanism drives the main gear to rotate, the main gear drives the pin to compress the driving spring, when the main crank arm and the driving spring are in a horizontal straight line, the driving spring starts to release energy, and in the process of releasing energy, the auxiliary crank arm drives the output shaft to rotate through the rotation of the pin and the auxiliary crank arm, so that the switching-on and switching-off operations are realized. Although the electric spring mechanism can effectively complete the switch-on and switch-off operations, the electric spring mechanism only stores energy through one group of driving springs, and has the problem of low operation power; and the electric spring mechanism has compact structure, is difficult to improve the operation power by prolonging the length of the driving spring, and is difficult to meet the requirement of large operation power of the ultra-high voltage closed combined electrical appliance switch.
Disclosure of Invention
The invention aims to provide an electric spring mechanism, aiming at solving the problem of low operation power of the existing electric spring mechanism; the invention also aims to provide the grounding switch provided with the electric spring mechanism.
In order to achieve the purpose, the technical scheme of the electric spring mechanism is as follows:
the electric spring mechanism comprises a rack, an output shaft which drives the moving contact to act is assembled on the rack in a rotating mode, an output connecting lever is connected to the output shaft in a rotating mode, the electric spring mechanism comprises a driving motor, the driving motor is connected with at least two energy storage connecting levers which are coaxially arranged in a transmission mode, each energy storage connecting lever is connected with an energy storage spring, and each energy storage connecting lever acts synchronously and drives the output shaft to rotate through driving the output connecting lever to act in an energy release process of the energy storage spring.
The beneficial effects are that: the electric spring mechanism comprises at least two energy storage crank arms, the energy storage crank arms are connected with energy storage springs, when the electric spring mechanism is used, the driving motor drives each energy storage crank arm to simultaneously act and compress the energy storage springs, each energy storage spring does work after a dead point and drives the output crank arm to rotate, the energy storage springs do work together, the operating power of the electric spring mechanism is obviously improved, the requirement of a large operating power of an extra-high voltage closed combined electrical appliance switch can be met, the operating reliability of equipment is improved, and meanwhile, the product economy is improved.
Specifically, the driving motor is connected with a gear with a rotating axis parallel to the rotating shaft of the energy storage crank arm in a transmission mode, and the gear drives the energy storage crank arm to rotate through a shifting pin extending axially. The gear drives the energy storage connecting lever to rotate through the shifting pin, so that the setting is convenient, and meanwhile, the gear is prevented from being driven to rotate when the energy storage connecting lever releases energy.
For further limiting the position of the pulling pin, the pulling pin is arranged on one side of the energy storage crank arm facing the gear, and a boss for pushing the pulling pin is arranged on the gear. The boss pushes the shifting pin to rotate, and the stability of pushing the shifting pin to rotate is enhanced.
Various improvements can be made to the various technical solutions described above.
The first improvement is to further limit each energy storage crank arm, and each energy storage crank arm is arranged in parallel in the axial direction. Each energy storage connecting lever is arranged in parallel in the axial direction, and the applicability to the grounding switch with large axial space and small radial space is strong.
In order to enable each energy storage connecting lever to act synchronously, each energy storage connecting lever realizes the synchronous rotation of two adjacent energy storage connecting levers through a shaft pin penetrating through the two adjacent energy storage connecting levers. The shaft pin is convenient for realizing the simultaneous action of each energy storage crank arm.
When the energy storage crank arm is provided with the shaft pin, the shaft pin and the shifting pin are integrally arranged. Is convenient for processing and assembling.
The number of the energy storage connecting levers is further limited, the number of the energy storage connecting levers is two, and the output connecting lever is located between the two energy storage connecting levers. The stability that two energy storage connecting levers promote output connecting lever is helped to strengthen.
In a second improvement, a stopping structure is arranged on the peripheral surface of the output crank arm, the electric spring mechanism comprises a locking mechanism, and a lock tongue of the locking mechanism is matched with the stopping structure to lock the output crank arm at the opening and closing positions respectively. The arrangement of the stop structure and the locking mechanism is helpful for preventing the output crank arm from excessively rotating.
And further limiting a stopping structure, wherein the stopping structure is a stopping edge, and two end surfaces of the stopping edge, which are positioned on the circumferential direction of the output crank arm, are matched with the lock tongue to lock the output crank arm. The blocking edge is convenient to arrange and facilitates processing.
In the third improvement, a buffer for buffering the output crank arm is arranged at the opening and closing positions of the output crank arm on the rack. Helping to prevent the output crank arm from over-rotating.
The technical scheme of the grounding switch is as follows:
the earthing switch comprises a fracture structure and an electric spring mechanism for driving a switch contact to perform opening and closing actions, the electric spring mechanism comprises a rack, an output shaft for driving a moving contact to perform actions is assembled on the rack in a rotating mode, an output connecting lever is connected to the output shaft in a rotating mode, the electric spring mechanism comprises a driving motor, the driving motor is connected with at least two energy storage connecting levers which are coaxially arranged in a transmission mode, each energy storage connecting lever is connected with an energy storage spring, and each energy storage connecting lever synchronously acts and drives the output shaft to rotate through driving the output connecting lever to act in an energy release process of the energy storage spring.
The beneficial effects are that: the electric spring mechanism comprises at least two energy storage connecting levers, the energy storage connecting levers are connected with energy storage springs, when the electric spring mechanism is used, the driving motor drives each energy storage connecting lever to simultaneously act to compress the energy storage springs, each energy storage spring does work after a dead point to drive the output connecting lever to rotate, the energy storage springs do work together to obviously improve the operation function of the electric spring mechanism, the requirement of a large operation function of an extra-high voltage closed combined electrical appliance switch can be met, the operation reliability of equipment is improved, and the product economy is improved.
Specifically, the driving motor is connected with a gear with a rotating axis parallel to the rotating shaft of the energy storage crank arm in a transmission mode, and the gear drives the energy storage crank arm to rotate through a shifting pin extending axially. The gear drives the energy storage connecting lever to rotate through the shifting pin, so that the setting is convenient, and meanwhile, the gear is prevented from being driven to rotate when the energy storage connecting lever releases energy.
For further limiting the position of the pulling pin, the pulling pin is arranged on one side of the energy storage crank arm facing the gear, and a boss for pushing the pulling pin is arranged on the gear. The boss pushes the shifting pin to rotate, and the stability of pushing the shifting pin to rotate is enhanced.
Various improvements can be made to the various technical solutions described above.
The first improvement is to further limit each energy storage crank arm, and each energy storage crank arm is arranged in parallel in the axial direction. Each energy storage connecting lever is arranged in parallel in the axial direction, and the applicability to the grounding switch with large axial space and small radial space is strong.
In order to enable each energy storage connecting lever to act synchronously, each energy storage connecting lever realizes the synchronous rotation of two adjacent energy storage connecting levers through a shaft pin penetrating through the two adjacent energy storage connecting levers. The shaft pin is convenient for realizing the simultaneous action of each energy storage crank arm.
When the energy storage crank arm is provided with the shaft pin, the shaft pin and the shifting pin are integrally arranged. Is convenient for processing and assembling.
The number of the energy storage connecting levers is further limited, the number of the energy storage connecting levers is two, and the output connecting lever is located between the two energy storage connecting levers. The stability that two energy storage connecting levers promote output connecting lever is helped to strengthen.
In a second improvement, a stopping structure is arranged on the peripheral surface of the output crank arm, the electric spring mechanism comprises a locking mechanism, and a lock tongue of the locking mechanism is matched with the stopping structure to lock the output crank arm at the opening and closing positions respectively. The arrangement of the stop structure and the locking mechanism is helpful for preventing the output crank arm from excessively rotating.
And further limiting a stopping structure, wherein the stopping structure is a stopping edge, and two end surfaces of the stopping edge, which are positioned on the circumferential direction of the output crank arm, are matched with the lock tongue to lock the output crank arm. The blocking edge is convenient to arrange and facilitates processing.
In the third improvement, a buffer for buffering the output crank arm is arranged at the opening and closing positions of the output crank arm on the rack. Helping to prevent the output crank arm from over-rotating.
Drawings
Fig. 1 is a first three-dimensional view of an electric spring mechanism of a first embodiment of a grounding switch of the present invention;
fig. 2 is a three-dimensional view of an electric spring mechanism of a first embodiment of the earthing switch of the present invention;
fig. 3 is a three-dimensional view of the electric spring mechanism of the first embodiment of the earthing switch of the present invention;
FIG. 4 is a schematic view of the bull gear and the cam of FIG. 1;
FIG. 5 is a schematic view of the connection state of two energy storage connecting levers in FIG. 1;
FIG. 6 is a schematic view of the connection between the output crank arm and the output shaft in FIG. 1;
FIG. 7 is a schematic view of the connection state of two energy storage connecting levers and a bull gear in FIG. 1;
FIG. 8 is a schematic structural view of the output crank arm of FIG. 1;
FIG. 9 is a schematic view of the locking mechanism of FIG. 1 locked to the output crank arm;
fig. 10 is a schematic view illustrating a connection state between an energy storage crank arm and an energy storage spring according to a third embodiment of the ground switch of the present invention;
in the drawings: 1. a drive motor; 2. a motor gear; 3. a bull gear; 4. a shaft pin; 5. an energy storage crank arm; 6. a connecting rod; 7. an output crank arm; 71. a locking surface; 72. a stop surface; 8. a cam; 9. an output shaft; 10. an energy storage spring; 11. fixing a guide cylinder; 12. a guide groove; 13. a latch; 14. an electromagnet; 15. an output crank arm buffer; 16. a return spring; 17. an energy storage crank arm; 18. an energy storage spring.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The first embodiment of the grounding switch comprises a fracture structure and an electric spring mechanism for driving a switch contact to be opened and closed. As shown in fig. 1 to 9, the electric spring mechanism includes a mounting frame, a driving motor 1, a motor gear 2, a large gear 3, a shaft pin 4, an energy storage crank arm 5, a connecting rod 6, an output crank arm 7, a cam 8, an output shaft 9, an energy storage spring 10, a fixed guide cylinder 11, a guide groove 12, a latch 13, an electromagnet 14, an output crank arm buffer 15 and a return spring 16.
An output shaft 9 is installed on the installation rack through a bearing and a bearing seat, two ends of the output shaft 9 are provided with connecting structures connected with the transmission mechanism, and the connecting structures are hexagonal prism sections. Referring to fig. 6, the output crank arm 7 is mounted on the output shaft 9, the output shaft 9 has a rotation stopping structure with a hexagonal frustum cross section, and the center of the output crank arm 7 has a hexagonal hole matched with the hexagonal frustum. It will be appreciated that the rotation-stopping connection between the output crank arm 7 and the output shaft 9 may be implemented by other rotation-stopping connection means (such as welding, screwing, integral arrangement, embedding, etc.) in other embodiments.
The output crank arm 7 has two cantilevers extending in the radial direction, and the right angle included angle of the two cantilevers is an obtuse angle. The front and rear side surfaces of the cantilevers are stopper surfaces 72, the output crank arm 7 has a sector groove on the circumferential surface between the two cantilevers, and the two wall surfaces of the sector groove are lock catch surfaces 71.
Referring to fig. 5, the output shaft 9 is sleeved with the energy storage crank arms 5 on both sides of the output crank arm 7, and the two energy storage crank arms 5 are sleeved on the output shaft 9 in parallel and concentrically. Of course, in other embodiments, a plurality of energy storage connecting levers can be sleeved on the output shaft, and one output connecting lever is installed between two adjacent energy storage connecting levers. All articulated on two energy storage connecting lever 5 have connecting rod 6, and energy storage connecting lever 5 is articulated through pivot 4 with connecting rod 6, and pivot 4 runs through two energy storage connecting lever 5 and both ends extend the outside of energy storage connecting lever 5, and pivot 4 extends the outside constitution of energy storage connecting lever 5 and dials the round pin. The connecting rod 6 is assembled in the fixed guide cylinder 11 in a guiding way, and the fixed guide cylinder 11 is provided with a connecting structure connected with the installation rack. The outer walls of the connecting rod 6 and the fixed guide cylinder 11 are sleeved with energy storage springs 10, and the length of each energy storage spring 10 is slightly smaller than the total length of the connecting rod 6 and the fixed guide cylinder 11.
The mounting machine frame is provided with a driving mechanism for driving the energy storage crank arm 5 to rotate, the driving mechanism comprises a driving motor 1 and a motor gear 2 connected with the driving motor 1, the motor gear 2 is meshed with a worm, the worm is meshed with a large gear 3, and the large gear 3 is sleeved on an output shaft 9. One side of the large gear 3 facing the energy storage crank arm 5 is provided with a cam 8 extending in the radial direction, and the cam 8 and the energy storage crank arm 5 are arranged integrally. Two bosses extending along the radial direction of the cam 8 are arranged on the outer wall surface of the cam 8, and the circumferential surfaces of the two bosses push the shaft pin 4 to drive the energy storage connecting lever 5 to rotate. The mounting rack is also provided with a locking mechanism close to and far away from the stop surface 72 on the output crank arm 7, the locking mechanism comprises an electromagnet 14 and a latch 13 which is assembled with the electromagnet 14 in a guiding way, the latch 13 is in a T-shaped structure, a stop ring is arranged on the vertical rod of the T-shaped latch 13, a return spring 16 is sleeved on the latch 13 between the stop ring and the electromagnet 14, and a guide groove 12 which guides the horizontal rod of the latch 13 is arranged on the mounting rack to prevent the latch 13 from moving in the up-down direction.
An output crank arm buffer 15 is arranged at the opening and closing positions of the output crank arm 7 on the mounting rack, and the output crank arm buffer 15 plays a role in buffering the output crank arm 7.
When the electric spring mechanism is used, the driving motor 1 starts to rotate in an electrified manner, the motor gear 2 rotates, the motor gear 2 drives the worm to rotate, the worm drives the large gear 3 to rotate, the large gear 3 and the cam 8 are integrated parts, after the electric spring mechanism idles for a certain angle, the large gear contacts with the shaft pin 4 and then starts to push the energy storage crank arm 5, the energy storage crank arm 5 rotates to push the connecting rod 6 to move, the connecting rod 6 slides in the fixed guide cylinder 11 (the energy storage crank arm 5, the connecting rod 6 and the fixed guide cylinder 11 form a crank block principle structure), the energy storage springs 10 are compressed (two sets of energy storage springs 10 are compressed simultaneously), and when a crank block structure formed by the energy storage crank arm 3 and the connecting rod 6 passes through a dead point, the electromagnet 14 is electrified to attract and pull. After the dead point is passed, the motor is powered off under the control of the microswitch, under the action of inertia, the cam 8, the worm, the driving motor 1 and the motor gear 2 idle for a certain angle and stop, and the energy storage spring 10 becomes the main power to quickly push the energy storage crank arm 5 to rotate. After idling for a certain angle, the shaft pin 4 on the energy storage connecting lever 5 is in contact with a cantilever on the output connecting lever 7, the shaft pin 4 pushes the output connecting lever 7 to rotate, after the rotation for a certain angle (generally about 30 degrees), the travel switch controls the power on and off of the electromagnet 14, the electromagnet 14 is powered off, the latch 13 is pushed by the reset spring 16 to prop against the fan-shaped arc section of the output connecting lever 7, after the output connecting lever 7 rotates for a certain angle (generally 50-90 degrees) according to the output requirement, the latch 13 slides to the latch surface 71 of the output connecting lever 7 to limit the output connecting lever 7, meanwhile, the shaft pin 4 and the energy storage connecting lever 5 are pressed on the output connecting lever 7 together, and finally, the output buffer and the stop position are formed under the action of the buffer of the output connecting lever 7.
The second embodiment of the earthing switch of the present invention is different from the first embodiment of the earthing switch in that two output connecting levers are provided between the two energy storage connecting levers in this embodiment, and of course, the number of the output connecting levers may be any number, such as three, four, etc., in other implementations.
As shown in fig. 10, a third embodiment of the ground switch of the present invention is different from the first embodiment of the ground switch in that two energy storage connecting levers 17 in the present embodiment are integrally arranged, the two energy storage connecting levers 17 are both connected with energy storage springs 18, the two energy storage springs 18 are located at two sides of the output shaft, and when the driving motor drives the energy storage connecting levers 17 to rotate, the energy storage connecting levers 17 compress the energy storage springs 18 at two sides for storing energy. The rest is the same as the first embodiment, and is not described again.
The specific embodiment of the electric spring mechanism of the present invention is the same as the electric spring mechanism in each of the above embodiments of the grounding switch, and is not described again.
Claims (10)
1. Electric spring mechanism, including the frame, its characterized in that: the rack is rotatably provided with an output shaft which drives the moving contact to act, the output shaft is connected with an output connecting lever in a top-to-bottom rotating mode, the electric spring mechanism comprises a driving motor, the driving motor is connected with at least two energy storage connecting levers which are coaxially arranged in a transmission mode, each energy storage connecting lever is connected with an energy storage spring, and each energy storage connecting lever acts synchronously and drives the output shaft to rotate by driving the output connecting lever to act in the energy release process of the energy storage spring.
2. The electrically powered spring mechanism of claim 1, wherein: the driving motor is connected with a gear with a rotating axis parallel to a rotating shaft of the energy storage crank arm in a transmission mode, and the gear drives the energy storage crank arm to rotate through a shifting pin extending axially.
3. The electrically powered spring mechanism of claim 2, wherein: the shifting pin is arranged on one side of the energy storage crank arm facing the gear, and a boss used for pushing the shifting pin is arranged on the end face of the gear.
4. The electric spring mechanism according to claim 2 or 3, characterized in that: all the energy storage crank arms are arranged in parallel in the axial direction.
5. The electrically powered spring mechanism of claim 4, wherein: each energy storage connecting lever realizes the synchronous rotation of two adjacent energy storage connecting levers through the pivot that runs through two adjacent energy storage connecting levers.
6. The electrically powered spring mechanism of claim 5, wherein: the shaft pin and the shifting pin are integrally arranged.
7. The electrically powered spring mechanism of claim 6, wherein: the energy storage connecting lever has two, output connecting lever is located between two energy storage connecting levers.
8. An electric spring mechanism according to any one of claims 1 to 3, characterized in that: the outer peripheral surface of the output crank arm is provided with a stopping structure, the electric spring mechanism comprises a locking mechanism, and a lock tongue of the locking mechanism is matched with the stopping structure to lock the output crank arm at the opening and closing positions respectively.
9. The electrically powered spring mechanism of claim 8, wherein: the stop structure is a stop edge, and two end faces of the stop edge, which are positioned on the circumferential direction of the output crank arm, are matched with the lock tongue to lock the output crank arm.
10. Earthing switch, including fracture structure and the electronic spring mechanism who drives switch contact and divide, close a floodgate action, its characterized in that: the electric spring mechanism according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270919.7A CN111105949A (en) | 2018-10-29 | 2018-10-29 | Electric spring mechanism and grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811270919.7A CN111105949A (en) | 2018-10-29 | 2018-10-29 | Electric spring mechanism and grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111105949A true CN111105949A (en) | 2020-05-05 |
Family
ID=70419289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811270919.7A Pending CN111105949A (en) | 2018-10-29 | 2018-10-29 | Electric spring mechanism and grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111105949A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204189691U (en) * | 2014-11-26 | 2015-03-04 | 余姚市华宇电器有限公司 | The two stressed 500KVGIS electric spring mechanism of a kind of Dual Drive |
| CN105513848A (en) * | 2016-01-12 | 2016-04-20 | 博纳方格（天津）电气设备有限公司 | Spring operating mechanism for circuit breaker |
| CN106504919A (en) * | 2016-10-19 | 2017-03-15 | 平高集团有限公司 | A kind of device for switching and its spring operating mechanism |
-
2018
- 2018-10-29 CN CN201811270919.7A patent/CN111105949A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204189691U (en) * | 2014-11-26 | 2015-03-04 | 余姚市华宇电器有限公司 | The two stressed 500KVGIS electric spring mechanism of a kind of Dual Drive |
| CN105513848A (en) * | 2016-01-12 | 2016-04-20 | 博纳方格（天津）电气设备有限公司 | Spring operating mechanism for circuit breaker |
| CN106504919A (en) * | 2016-10-19 | 2017-03-15 | 平高集团有限公司 | A kind of device for switching and its spring operating mechanism |
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