CN216250545U - Spring operating mechanism of high-voltage vacuum circuit breaker - Google Patents
Spring operating mechanism of high-voltage vacuum circuit breaker Download PDFInfo
- Publication number
- CN216250545U CN216250545U CN202122832734.4U CN202122832734U CN216250545U CN 216250545 U CN216250545 U CN 216250545U CN 202122832734 U CN202122832734 U CN 202122832734U CN 216250545 U CN216250545 U CN 216250545U
- Authority
- CN
- China
- Prior art keywords
- energy storage
- side plate
- closing
- spring
- shaft
- 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
Images
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a spring operating mechanism of a high-voltage vacuum circuit breaker, which comprises a middle side plate and an energy storage driving operation unit, wherein first installation square rods are arranged at two ends of one side of the middle side plate, one ends of the two first installation square rods, which are far away from the middle side plate, are respectively connected with two ends of one side of a right side plate, two second installation square rods positioned below the first installation square rods are arranged on the middle side plate, and one ends of the two second installation square rods, which are far away from the middle side plate, are respectively connected with two ends of one side of the left side plate. The manufacturing cost of the product is reduced.
Description
Technical Field
The utility model relates to the technical field of spring operating mechanisms of high-voltage vacuum circuit breakers, in particular to a spring operating mechanism of a high-voltage vacuum circuit breaker.
Background
The leading products of the high-voltage switchgear in China at present all use the high-voltage vacuum circuit breaker spring operating mechanism in a matching way, and along with the use of the high-voltage vacuum circuit breaker spring operating mechanism, people find that the following defects exist: the switching-on spring adopts a single compression spring, so that the transmission efficiency of switching-on work is reduced; the mechanism main transmission part state observation sight line cannot measure or observe the closing and opening brake buckling amount, and is not beneficial to daily maintenance and overhaul of the mechanism; the manual energy storage uses the transmission mode of the bevel gear, the structure is more complicated, and the manufacturing cost of the product is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a spring operating mechanism of a high-voltage vacuum circuit breaker, which aims to solve the problem that a switching-on spring provided in the background technology adopts a single compression spring, so that the transmission efficiency of switching-on work is reduced; the mechanism main transmission part state observation sight line cannot measure or observe the closing and opening brake buckling amount, and is not beneficial to daily maintenance and overhaul of the mechanism; the manual energy storage uses the transmission mode of the bevel gear, the structure is more complicated, and the problem of increasing the manufacturing cost of the product is solved.
In order to achieve the purpose, the utility model provides the following technical scheme: a spring operating mechanism of a high-voltage vacuum circuit breaker comprises a middle side plate and an energy storage driving operation unit, wherein first installation square rods are installed at two ends of one side of the middle side plate, one ends, far away from the middle side plate, of the two first installation square rods are respectively connected with two ends of one side of a right side plate, two second installation square rods located below the first installation square rods are installed on the middle side plate, one ends, far away from the middle side plate, of the two second installation square rods are respectively connected with two ends of one side of a left side plate, a spring hanging shaft penetrating through the middle side plate is installed between the left side plate and the right side plate, a switching-on and switching-off driving unit is installed between the right side plate and the middle side plate and comprises a switching-off half shaft, a switching-on electromagnet, a switching-on half shaft, a switching-on electromagnet and an energy storage driving operation unit, a first switching-on spring is installed in the middle part, far away from the left side plate, of the right side plate, the middle part of the left side plate, which is far away from one side of the right side plate, is provided with a second closing spring, the energy storage motor part below the second closing spring is arranged on the left side plate, the first closing spring and the second closing spring are designed into two cylindrical spiral extension springs, the two cylindrical spiral extension springs are obliquely arranged on the two sides of the left side plate and the right side plate respectively, the whole structure is attractive and elegant, and the gravity center is stable.
Preferably, the counter is installed at the top that left side board one side was kept away from to the right side board, the bottom that left side board one side was kept away from to the right side board is installed and is closed the separating brake and instruct, install the energy storage instruction that is located to close separating brake and instruct the below on the right side board, combined floodgate electro-magnet and separating brake electro-magnet arrange in right side board right side, close separating brake and switch over auxiliary switch and arrange in the upper portion of left side board and well curb plate, energy storage switching micro-gap switch arranges in the left side board lower left corner, and counter, close separating brake and instruct and arrange in right side board right side with the energy storage instruction.
Preferably, the left side plate is provided with an energy storage switching microswitch positioned below the second closing spring, the left side plate is provided with a secondary wiring terminal positioned on one side of the second closing spring, when the closing electromagnet obtains a closing electric signal or manually presses a manual closing button, the closing half shaft rotates anticlockwise, the second roller on the energy storage keeping output connecting lever is separated from the closing buckle plate, the energy storage keeping state is released, under the action of the spring force of the first closing spring and the second closing spring, the energy storage shaft drives the closing cam to rotate anticlockwise, when the closing cam impacts the second roller on the output connecting lever, the output connecting lever rotates clockwise, the output connecting lever accelerates first and then decelerates, when the speed is reduced to zero, the output connecting lever returns to rotate anticlockwise, when an opening catch on the output connecting lever contacts the first roller on the opening buckle plate, the opening buckle plate rotates anticlockwise, when the opening buckle plate contacts the opening half shaft, the movement is stopped, and the closing state of the output crank arm is kept.
Preferably, the energy storage motor part includes gear wheel, energy storage axle, manual energy storage gear shaft, motor gear shaft and energy storage motor, the motor gear shaft is installed to the output of energy storage motor, the meshing of motor gear shaft is connected with the gear wheel, one side meshing that the motor gear shaft was kept away from to the gear wheel is connected with manual energy storage gear shaft, the mid-mounting of gear wheel has the energy storage axle, and the epaxial motor gear shaft of energy storage motor clockwise rotation or manual energy storage handle pass through one-way bearing and drive manual energy storage gear shaft clockwise rotation, drive the epaxial gear wheel anticlockwise rotation of assembly in the energy storage, through output turning arm pulling energy storage spring tensile, realize spring energy storage.
Preferably, an auxiliary switch for switching on and off, a manual switch-on button, a manual switch-off button, a manual energy storage operation block and an energy storage driving transmission pair are sequentially arranged between the left side plate and the middle side plate from top to bottom, one side of the energy storage shaft is connected with one side of the second switch-on spring, the switch-off spring of the circuit breaker is stretched when the output connecting lever drives the circuit breaker to switch on, the contact pressure spring is compressed, energy is stored, and preparation is made for switching off the mechanism.
Preferably, the energy storage driving operation unit comprises a separating brake buckle plate, an output crank arm, a first roller, a second roller, a separating brake pawl, an output shaft, a third roller, a fourth roller and a closing buckle plate, the first roller is installed in the middle of the separating brake buckle plate, the separating brake pawl is installed between the second roller and the output shaft, the third roller is installed in the middle of the output shaft, the fourth roller is installed in the middle of the closing buckle plate, one side of a separating brake half shaft is connected with one side of the separating brake buckle plate, one side of a closing half shaft is connected with one side of the closing buckle plate, the middle of the output crank arm is connected with the output shaft, a closing cam is installed on the outer side of the second roller, when an energy storage motor obtains an energy storage electric signal or shakes a manual energy storage gear shaft through a manual energy storage handle to store energy, the energy storage shaft drives the closing cam to keep the output crank arm to rotate anticlockwise, when the output connecting lever passes through the middle, an electric signal is cut off or the manual energy storage torque is relieved, the energy storage keeps the second roller on the output connecting lever to lean against the closing buckle plate, the closing buckle plate rotates anticlockwise to contact with the closing half shaft and then stops moving, the energy storage state of the mechanism is kept, and preparation is made for closing operation of the mechanism.
Compared with the prior art, the utility model has the beneficial effects that: the closing spring of the spring operating mechanism is designed into two cylindrical spiral extension springs which are obliquely arranged on the two sides of the left side plate and the right side plate respectively, the overall structure is attractive and elegant, the gravity center is stable, the closing spring is of an adjustable structure so as to meet the requirements of different closing powers, and the energy storage driving operation unit is designed into a first-level gear for reducing the speed, so that the manufacturing cost of a product is reduced.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of the installation of the switching-on/switching-off driving unit on the right side plate of the present invention;
FIG. 4 is a schematic view of the mounting of the energy storing motor components of the present invention on the left side plate;
FIG. 5 is a schematic structural diagram of an energy storage motor component according to the present invention;
FIG. 6 is a first state diagram of the energy storage driving operation unit according to the present invention;
fig. 7 is a second state diagram of the energy storage driving operation unit according to the present invention.
In the figure: 1. a first mounting square bar; 2. a right side plate; 3. a spring hanging shaft; 4. an output crank arm; 5. a first closing spring; 6. a counter; 7. switching on and switching off indication; 8. an energy storage indication; 9. a closing cam; 10. a second mounting square bar; 11. the energy storage drives the transmission pair; 12. an energy storage switching microswitch; 13. a manual energy storage operation block; 14. a manual brake-separating button; 15. a secondary wiring terminal; 16. a manual closing button; 17. a second closing spring; 18. switching on and off the switching auxiliary switch; 19. a left side plate; 20. a middle side plate; 21. a brake-separating half shaft; 22. closing an electromagnet; 23. a switching-on half shaft; 24. a brake separating electromagnet; 25. an energy storage motor component; 26. a bull gear; 27. an energy storage shaft; 28. a manual energy storage gear shaft; 29. a motor gear shaft; 30. an energy storage motor; 31. separating brake buckle; 32. a first roller; 33. a second roller; 34. a brake separating pawl; 35. an output shaft; 36. a third roller; 37. an energy storage drive operation unit; 38. a switching-on and switching-off driving unit; 39. closing a buckle plate; 40. and a fourth roller.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-7, the present invention provides a spring operating mechanism for a high voltage vacuum circuit breaker, which includes a middle side plate 20 and an energy storage driving operation unit 37, wherein two ends of one side of the middle side plate 20 are provided with first installation square bars 1, one ends of the two first installation square bars 1 far away from the middle side plate 20 are respectively connected with two ends of one side of a right side plate 2, two second installation square bars 10 located below the first installation square bars 1 are installed on the middle side plate 20, one ends of the two second installation square bars 10 far away from the middle side plate 20 are respectively connected with two ends of one side of a left side plate 19, a spring hanging shaft 3 penetrating through the middle side plate 20 is installed between the left side plate 19 and the right side plate 2, a closing and opening driving unit 38 is installed between the right side plate 2 and the middle side plate 20, the closing and opening driving unit 38 includes an opening half shaft 21, a closing electromagnet 22, a closing half shaft 23, an opening electromagnet 24 and an energy storage driving operation unit 37, the middle part that the left side board 19 one side was kept away from to right side board 2 has first combined floodgate spring 5, the middle part that right side board 2 one side was kept away from to left side board 19 has second combined floodgate spring 17, install the energy storage motor part 25 that is located second combined floodgate spring 17 below on the left side board 19, two cylindrical helical extension springs are designed into to first combined floodgate spring 5 and second combined floodgate spring 17, the slant is arranged respectively in left side board 19 and 2 both sides of right side board, overall structure elegant appearance, the focus is stable.
The top that the 19 one side of left side board was kept away from to right side board 2 is installed counter 6, the bottom that 19 one side of left side board was kept away from to right side board 2 is installed and is closed separating brake and instruct 7, install the energy storage that is located to close separating brake and instruct 7 below on the board of right side 2 and instruct 8, closing electromagnet 22 and separating brake electromagnet 24 arrange in the 2 right sides of right side board, close separating brake and switch auxiliary switch 18 and arrange in the upper portion of left side board 19 and well curb plate 20, energy storage switches micro-gap switch 12 and arranges in the 19 lower left corners of left side board, counter 6, close separating brake and instruct 7 and the energy storage to instruct 8 and arrange in the 2 right sides of right side board.
The left side plate 19 is provided with an energy storage switching microswitch 12 positioned below a second closing spring 17, the left side plate 19 is provided with a secondary connecting terminal 15 positioned at one side of the second closing spring 17, when a closing electromagnet 22 obtains a closing electric signal or manually presses a manual closing button 16, a closing half shaft 23 rotates anticlockwise, a second roller 33 on an energy storage keeping output crank arm 4 is separated from a closing buckle plate 39, an energy storage keeping state is relieved, under the action of the spring force of a first closing spring 5 and the second closing spring 17, an energy storage shaft 27 drives a closing cam 9 to rotate anticlockwise, when the closing cam 9 impacts the second roller 33 on the output crank arm 4, the output crank arm 4 rotates clockwise, the output crank arm 4 accelerates first and then decelerates, when the speed is reduced to zero, the output crank arm 4 returns to rotate anticlockwise, when an opening pawl 34 on the output crank arm 4 contacts a first roller 32 on an opening buckle plate 31, the opening buckle plate 31 rotates anticlockwise, when the opening buckle plate 31 contacts the opening half shaft 21, the movement is stopped, and the closing state of the output crank arm 4 is kept.
Energy storage motor part 25 includes gear wheel 26, energy storage axle 27, manual energy storage gear shaft 28, motor gear shaft 29 and energy storage motor 30, motor gear shaft 29 is installed to energy storage motor 30's output, motor gear shaft 29 meshing is connected with gear wheel 26, one side meshing that motor gear shaft 29 was kept away from to gear wheel 26 is connected with manual energy storage gear shaft 28, the mid-mounting of gear wheel 26 has energy storage axle 27, the epaxial motor gear shaft 29 of energy storage motor 30 clockwise rotates or manual energy storage handle passes through one-way bearing and drives manual energy storage gear shaft 28 clockwise rotation, drive gear wheel 26 anticlockwise rotation of assembly on energy storage axle 27, it is tensile through 4 pulling energy storage springs of output turning arm, realize the spring energy storage.
An auxiliary switch 18 for switching on and off, a manual switch-on button 16, a manual switch-off button 14, a manual energy storage operation block 13 and an energy storage driving transmission pair 11 are sequentially arranged between the left side plate 19 and the middle side plate 20 from top to bottom, one side of an energy storage shaft 27 is connected with one side of a second switch-on spring 17, when the output connecting lever 4 drives the circuit breaker to switch on, the switch-off spring of the circuit breaker is stretched, a contact pressure spring is compressed, energy is stored, and preparation is made for mechanism switch-off.
The energy storage driving operation unit 37 comprises an opening buckle plate 31, an output crank arm 4, a first roller 32, a second roller 33, an opening pawl 34, an output shaft 35, a third roller 36, a fourth roller 40 and a closing buckle plate 39, the first roller 32 is arranged in the middle of the opening buckle plate 31, the opening pawl 34 is arranged between the second roller 33 and the output shaft 35, the third roller 36 is arranged in the middle of the output shaft 35, the fourth roller 40 is arranged in the middle of the closing buckle plate 39, one side of an opening half shaft 21 is connected with one side of the opening buckle plate 31, one side of a closing half shaft 23 is connected with one side of the closing buckle plate 39, the middle of the output crank arm 4 is connected with the output shaft 35, a closing cam 9 is arranged on the outer side of the second roller 33, when an energy storage electric signal is obtained by an energy storage motor 30 or a manual energy storage handle shakes the manual energy storage gear shaft 28 to perform mechanism, the energy storage shaft 27 drives the closing cam 9, and the output connecting lever 4 is kept rotating anticlockwise, when the output connecting lever 4 passes through the middle, an electric signal is cut off or the manual energy storage torque is relieved, the energy storage keeps the second roller 33 on the output connecting lever 4 to lean against the closing buckle plate 39, the closing buckle plate 39 stops moving after rotating anticlockwise to contact the closing half shaft 23, the energy storage state of the mechanism is kept, and preparation is made for the closing operation of the mechanism.
When the embodiment of the application is used: when the energy storage motor 30 obtains an energy storage electric signal or the manual energy storage handle shakes the manual energy storage gear shaft 28 to store energy of the mechanism, the energy storage shaft 27 drives the closing cam 9 to keep the output crank arm 4 to rotate anticlockwise, when the output crank arm 4 passes through the middle, the electric signal is cut off or the manual energy storage torque is relieved, the energy storage keeps the second roller 33 on the output crank arm 4 to lean against the closing buckle plate 39, the closing buckle plate 39 rotates anticlockwise to contact with the closing half shaft 23 and stops moving, the energy storage state of the mechanism is kept, the preparation is prepared for the closing operation of the mechanism, the motor gear shaft 29 on the energy storage motor 30 rotates clockwise or the manual energy storage handle drives the manual energy storage gear shaft 28 to rotate clockwise through a one-way bearing to drive the big gear 26 assembled on the energy storage shaft 27 to rotate anticlockwise, the energy storage spring is stretched by pulling the energy storage spring through the output crank arm 4, and when the output crank arm 4 drives the closing circuit breaker, the breaker opening spring is stretched, the contact pressure spring is compressed, energy is stored, preparation is made for mechanism opening, when the mechanism closing action is completed, the contact of the energy storage switching microswitch 12 is switched on, if the external energy storage signal is not released at the moment, the energy storage motor 30 continues energy storage operation, or the manual energy storage handle is shaken to continue energy storage operation, and after the energy storage operation is completed, the mechanism is in a closed energy storage state and is prepared for the next closing operation.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (6)
1. A high-voltage vacuum circuit breaker spring operating mechanism comprises a middle side plate (20) and an energy storage driving operation unit (37), and is characterized in that: the two ends of one side of the middle side plate (20) are provided with first installation square rods (1), one ends, far away from the middle side plate (20), of the two first installation square rods (1) are respectively connected with the two ends of one side of the right side plate (2), the middle side plate (20) is provided with two second installation square rods (10) positioned below the first installation square rods (1), one ends, far away from the middle side plate (20), of the two second installation square rods (10) are respectively connected with the two ends of one side of the left side plate (19), a spring hanging shaft (3) penetrating through the middle side plate (20) is installed between the left side plate (19) and the right side plate (2), a closing and opening driving unit (38) is installed between the right side plate (2) and the middle side plate (20), and the closing and opening driving unit (38) comprises an opening half shaft (21), a closing electromagnet (22), a closing half shaft (23), an opening electromagnet (24) and an energy storage driving operation unit (37), the energy storage device is characterized in that a first closing spring (5) is arranged in the middle of one side, far away from a left side plate (19), of the right side plate (2), a second closing spring (17) is arranged in the middle of one side, far away from the right side plate (2), of the left side plate (19), and an energy storage motor component (25) located below the second closing spring (17) is arranged on the left side plate (19).
2. The spring operating mechanism of the high-voltage vacuum circuit breaker according to claim 1, wherein: the utility model discloses a closing and opening mechanism of a motor vehicle, including left side board (19), right side board (2) keep away from the top of left side board (19) one side and install counter (6), the bottom of left side board (19) one side is kept away from in right side board (2) is installed and is closed separating brake and instruct (7), install on right side board (2) and be located and close separating brake and instruct (8) of indicating (7) below.
3. The spring operating mechanism of the high-voltage vacuum circuit breaker according to claim 1, wherein: the energy storage switching microswitch (12) is arranged below the second closing spring (17) and mounted on the left side plate (19), and the secondary wiring terminal (15) is mounted on one side of the second closing spring (17) and mounted on the left side plate (19).
4. The spring operating mechanism of the high-voltage vacuum circuit breaker according to claim 1, wherein: energy storage motor part (25) include gear wheel (26), energy storage axle (27), manual energy storage gear shaft (28), motor gear shaft (29) and energy storage motor (30), motor gear shaft (29) are installed to the output of energy storage motor (30), motor gear shaft (29) meshing is connected with gear wheel (26), one side meshing that motor gear shaft (29) were kept away from in gear wheel (26) is connected with manual energy storage gear shaft (28), the mid-mounting of gear wheel (26) has energy storage axle (27).
5. The spring operating mechanism of claim 4, wherein: an auxiliary switch (18), a manual switching-on button (16), a manual switching-off button (14), a manual energy storage operation block (13) and an energy storage driving transmission pair (11) are sequentially arranged between the left side plate (19) and the middle side plate (20) from top to bottom, and one side of the energy storage shaft (27) is connected with one side of the second switching-on spring (17).
6. The spring operating mechanism of claim 4, wherein: the energy storage driving operation unit (37) comprises a brake separating buckle plate (31), an output crank arm (4), a first roller (32), a second roller (33), a brake separating pawl (34), an output shaft (35), a third roller (36), a fourth roller (40) and a closing buckle plate (39), the first roller (32) is installed in the middle of the brake separating buckle plate (31), the brake separating pawl (34) is installed between the second roller (33) and the output shaft (35), the third roller (36) is installed in the middle of the output shaft (35), the fourth roller (40) is installed in the middle of the closing buckle plate (39), one side of a brake separating half shaft (21) is connected with one side of the brake separating buckle plate (31), one side of a closing half shaft (23) is connected with one side of the closing buckle plate (39), the middle of the output crank arm (4) is connected with the output shaft (35), and a closing cam (9) is arranged on the outer side of the second roller (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122832734.4U CN216250545U (en) | 2021-11-18 | 2021-11-18 | Spring operating mechanism of high-voltage vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122832734.4U CN216250545U (en) | 2021-11-18 | 2021-11-18 | Spring operating mechanism of high-voltage vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216250545U true CN216250545U (en) | 2022-04-08 |
Family
ID=80945875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122832734.4U Active CN216250545U (en) | 2021-11-18 | 2021-11-18 | Spring operating mechanism of high-voltage vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216250545U (en) |
-
2021
- 2021-11-18 CN CN202122832734.4U patent/CN216250545U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201673854U (en) | Embedded-pole vacuum circuit breaker operation mechanism | |
| CN2879394Y (en) | Spring operating mechanism for circuit breaker | |
| CN104505301A (en) | Spring operation mechanism of indoor vacuum circuit breaker | |
| CN216250545U (en) | Spring operating mechanism of high-voltage vacuum circuit breaker | |
| CN204696030U (en) | A kind of Mainspring type outdoor vacuum circuit breaker | |
| CN220085865U (en) | Miniaturized spring operating mechanism of high-voltage alternating current circuit breaker | |
| CN201017809Y (en) | Integral switch | |
| CN2879408Y (en) | Manual electric integral operating mechanism for circuit breaker | |
| CN204230146U (en) | A kind of indoor vacuum circuit breaker spring operating mechanism | |
| CN209544272U (en) | A kind of breaker with electrically operated device | |
| CN201498391U (en) | High-voltage breaker spring operating mechanism | |
| CN216212951U (en) | Circuit breaker operating mechanism | |
| CN210925920U (en) | Opening and closing spring energy storage combined system for circuit breaker | |
| CN209526014U (en) | The transmission mechanism of auxiliary switch | |
| CN1274166A (en) | Drive unit in electric operation mechanism of breaker | |
| CN221201008U (en) | Spring operating mechanism of vacuum circuit breaker | |
| CN201387840Y (en) | Spring operating mechanism for miniature vacuum load switch or vacuum circuit breaker | |
| CN101651061B (en) | Electric vacuum isolated phase change switch with manual-isolating switch | |
| CN219457453U (en) | Three-phase pillar type vacuum circuit breaker | |
| CN2473729Y (en) | Electric switch-on device | |
| CN2480970Y (en) | Axle, sleeve, linking-board operation-control mechanism | |
| CN220357984U (en) | Compact spring operating mechanism and air insulation ring main unit | |
| CN217588817U (en) | Transmission device of circuit breaker | |
| CN213546196U (en) | Novel upper shaft shifting plate assembly used in load switch | |
| CN219476522U (en) | Spring quick operating mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |