CN210443483U - Transmission mechanism of grounding switch - Google Patents
Transmission mechanism of grounding switch Download PDFInfo
- Publication number
- CN210443483U CN210443483U CN201921369149.1U CN201921369149U CN210443483U CN 210443483 U CN210443483 U CN 210443483U CN 201921369149 U CN201921369149 U CN 201921369149U CN 210443483 U CN210443483 U CN 210443483U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- spring assembly
- moving contact
- contact
- connecting pin
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 26
- 230000003068 static effect Effects 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 30
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Abstract
The utility model discloses a earthing switch's drive mechanism, including installation base, moving contact, static contact, spring unit, main shaft, group preforming and connecting pin, group preforming and main shaft assembly mutually, spring unit installs one end on the installation base, and one end is connected with the moving contact through group preforming. The main shaft rotates to drive the poking sheet, the poking sheet enables the spring assembly to apply force to rotate through the connecting pin, the spring assembly is compressed to store energy, and after the spring assembly rotates to the maximum stress point in a vertical state, the spring assembly releases energy to one side, so that the moving contact is driven to realize switching on or switching off with the static contact. The utility model discloses the assembly is simple, the transmission is reliable, makes earthing switch can close a floodgate or separating brake fast to hold state is stable.
Description
Technical Field
The utility model relates to an earthing switch field especially relates to an earthing switch's drive mechanism.
Background
When normally working in a high-voltage circuit, the power distribution cabinet is electrified equipment, when the switch cabinet needs to be overhauled, the switch cabinet needs to be grounded so as to avoid electric shock danger of maintainers, an element for controlling whether the switch cabinet is grounded is a grounding switch, and the grounding switch is controlled by an operating mechanism.
Among the ground switch abnormal faults, the ground fault caused by the failure of the transmission device accounts for a large percentage. The existing transmission operating mechanism with a simple structure has the problems of large motion error, unstable transmission and the like, so that the grounding switch cannot be quickly switched on or switched off and cannot keep a stable switching-on or switching-off state; the transmission mechanism with a complex structure also has the problems of multiple parts, complex assembly and the like. Therefore, it is urgently needed to design a transmission device which is simple in assembly and reliable in transmission, enables the grounding switch to be quickly switched on or switched off, and keeps a stable state.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that it is not enough to exist to prior art, and provide a drive mechanism that earthing switch divide-shut brake was used, it is simple, the transmission is reliable to have the assembly, makes earthing switch can close a floodgate or separating brake fast to keep state stable's transmission.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a ground switch's drive mechanism, includes installation base, rotatable main shaft, the cover that sets up on the installation base establish the main epaxial moving contact and the static contact of fixed mounting on the installation base, the moving contact cooperates closing or separating brake through rotatory and static contact, its characterized in that: the spring assembly is arranged on the main shaft and can rotate along with the main shaft, one end of the spring assembly is rotatably arranged on the mounting base, the other end of the spring assembly is hinged with the moving contact through a connecting pin, the edge of the poking sheet is provided with a limiting groove, two ends of the limiting groove are protruded to form a left boss and a right boss, and the connecting pin is positioned in the limiting groove; when the moving contact and the static contact are switched from a switching-on state to a switching-off state, the main shaft rotates clockwise to drive the shifting sheet to rotate, the right boss of the shifting sheet abuts against the connecting pin, the spring assembly and the moving contact are further driven to rotate away from the static contact, the spring assembly is compressed to store energy, when the spring assembly rotates to a vertical angle, the spring assembly reaches a maximum stress point, the spring assembly rotates continuously and then obliquely releases energy to one side back to the static contact, and the connecting pin slides to the left boss along the limiting groove of the shifting sheet and then abuts against the shifting sheet and the main shaft; when the moving contact and the static contact are switched on and off from an opening state, the main shaft rotates anticlockwise to drive the pressing piece to rotate; the left boss of the pressing piece abuts against the connecting pin, so that the spring assembly and the moving contact are driven to rotate to be close to the static contact, the spring assembly is compressed to store energy, and the spring assembly releases energy when rotating past a maximum stress point; the connecting pin slides to the right boss along the limiting groove of the poking and pressing piece, so that the movable contact can rotate quickly to close the switch.
Preferably, the spring assembly comprises a spring and bases respectively arranged at two ends of the spring, cylindrical bosses are arranged at one end of each base, and the bosses penetrate into the spring; the other end of the base at the upper part is connected with the connecting pin, and the other end of the base at the lower part is rotatably connected with the mounting base.
Preferably, the grounding device further comprises a transmission assembly, wherein the transmission assembly comprises a grounding rod, an upper crank arm, a lower crank arm, an upper U-shaped piece, a lower U-shaped piece and a pull rod, the grounding rod is assembled on the upper crank arm, and the upper crank arm is hinged with the upper U-shaped piece; the upper U-shaped piece and the lower U-shaped piece are connected through a pull rod; the lower U-shaped part is hinged on the lower crank arm; the lower crank arm is assembled with the main shaft; the upper crank arm and the lower crank arm are arranged at 90 degrees, and the grounding rod is perpendicular to the main shaft after installation.
Preferably, the side walls of the sleeve holes of the crank arm and the poking and pressing piece are internally provided with a boss in a 90-degree fan shape, the shaft bodies of the main shaft and the ground rod are provided with a groove in a 90-degree fan shape, and the boss and the groove are mutually embedded when the crank arm is assembled with the main shaft and the ground rod and when the poking and pressing piece is assembled with the main shaft.
Preferably, two upper and lower turning arms outwards run through threaded hole with earthing rod or main shaft complex trepanning lateral wall respectively, during the assembly through the bolt top tight earthing rod or the main shaft of twist with threaded hole looks adaptation, screw out the bolt when dismantling and go on relaxing.
Preferably, the lower edge of the static contact is provided with a chamfer, and the side edge is provided with a lug; the moving contact comprises two lamellar bodies that have gapped each other, and when the static contact closed with the moving contact, two lamellar bodies blocked to the lug through the chamfer direction of static contact.
Preferably, the poking and pressing pieces are arranged into two groups, and the poking and pressing pieces are symmetrically arranged on two sides of the moving contact and are matched with the connecting pins at two ends.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the parts are easy to assemble, and the assembly is realized in a sleeved or hinged mode, so that the assembly difficulty is simplified; 2. the switching-on or switching-off process is rapidly carried out in a mode that the spring assembly rapidly releases energy to drive the connecting pin to displace; 3. when the movable contact is in a closing or opening state, the spring assembly continues to apply force to the movable contact, and the closing or opening state is kept stable; 4. the moving contact is sleeved on the main shaft, so that the rotation of the main shaft cannot be caused during the switching-on or switching-off rotation, and the operation safety is ensured.
Drawings
Fig. 1 is a schematic perspective view of a transmission mechanism of the ground switch of the present invention.
Fig. 2 is a schematic view of the dial plate of fig. 1.
Fig. 3 is a schematic view of a stationary contact in fig. 1.
Fig. 4 is a schematic view of the combination of the moving contact and the pressure pulling piece in fig. 1.
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.
As shown in fig. 1-4, a transmission mechanism of a ground switch includes an installation base 9, a main shaft 6 rotatably disposed on the installation base 9, a movable contact 15 sleeved on the main shaft 6, and a stationary contact 16 fixedly mounted on the installation base 9, wherein the movable contact 15 cooperates with the stationary contact 16 to close or open a switch by rotation, and is characterized in that: the spring component 21 is rotatably arranged on the mounting base 9, one end of the spring component 21 is hinged with the moving contact 15 through a connecting pin 14, the edge of the pressing piece 13 is provided with a limiting groove, two ends of the limiting groove are protruded to form a left boss 23 and a right boss 22, and the connecting pin 14 is positioned in the limiting groove; when the moving contact 15 and the static contact 16 are switched from a switching-on state to a switching-off state, the main shaft 6 rotates clockwise to drive the pressing piece 13 to rotate, the right boss 22 of the pressing piece 13 abuts against the connecting pin 14, the spring assembly 21 and the moving contact 15 are further driven to rotate to be far away from the static contact 16, the spring assembly 21 is compressed to store energy, when the vertical angle is reached, the spring assembly 21 reaches the maximum stress point, after the spring assembly 21 rotates continuously, the spring assembly 21 releases energy in an inclined mode towards the side back to the static contact 16, and the connecting pin 14 slides to the left boss 23 along the limiting groove of the pressing piece 13 and then abuts against the pressing piece 13 and the main shaft 6; when the moving contact 15 and the static contact 16 are switched on from the switching-off state, the main shaft 6 rotates anticlockwise to drive the pressing sheet 13 to rotate; the left boss 23 of the pressing piece 13 props against the connecting pin 14, so that the spring assembly 21 and the moving contact 15 are driven to rotate to be close to the static contact 16, the spring assembly 21 is compressed to store energy, and the spring assembly 21 releases energy when rotating through a maximum stress point; the connecting pin 14 slides to the right boss 22 along the limit groove of the pressing plate 13, so that the movable contact 15 can rotate and close quickly. The spring assembly 21 is relatively quick when the energy storage is converted into the energy release, and the spring drives the connecting pin 14 to quickly move along the limiting groove of the pressing plate 13 when the energy is released, so that the movable contact 15 is quickly rotated to achieve the purpose of closing or opening; the limiting groove of the poking and pressing piece 13 plays a role in limiting the displacement of the connecting pin 14, and the left boss 23 and the right boss 22 of the poking and pressing piece 13 not only serve as force application points during rotation, but also serve as the moving terminal points of the connecting pin 14 after the spring assembly 21 releases energy; meanwhile, after the connecting pin 14 displaces to a boss on one side, because the spring assembly 21 does not completely release energy, thrust in the displacement direction can be continuously applied to the connecting pin 14, and the effect of stabilizing the position of the movable contact 15 is achieved; the moving contact 15 and the main shaft 6 assembly component adopt a sleeving connection mode, the moving contact 15 cannot cause the rotation of the main shaft 6 when being switched on or switched off to rotate, and the operation safety is ensured.
As a modified specific embodiment, the spring assembly 21 includes a spring 11 and bases 12 respectively disposed at two ends of the spring 11, wherein one end of each base 12 has a cylindrical boss penetrating into the spring 11; the other end of the upper base 12 is connected to a connecting pin 14, and the other end of the lower base 12 is rotatably connected to the mounting base 9. The base 12 limits the position of the spring 11 to be fixed between the bases 12 by embedding the boss into the spring 11, the poking and pressing piece 13 applies force to the base 12 through the connecting pin 14, the upper part and the lower part of the base 12 are displaced relatively to achieve the effect of compressing the spring 11, meanwhile, enough space is reserved between the upper part and the lower part of the base 12, and the telescopic space of the spring 11 is guaranteed.
As a modified specific embodiment, the device further comprises a transmission assembly 20, wherein the transmission assembly 20 comprises a grounding rod 1, an upper crank arm 2, a lower crank arm 2, an upper U-shaped part 3, a lower U-shaped part 3 and a pull rod 4, the grounding rod 1 is assembled on the upper crank arm 2, and the upper crank arm 2 is hinged with the upper U-shaped part 3; the upper U-shaped part 3 and the lower U-shaped part 3 are connected through a pull rod 4; the lower U-shaped part 3 is hinged on the lower crank arm 2; the lower crank arm 2 is assembled with the main shaft 6; the upper crank arm and the lower crank arm 2 are arranged at 90 degrees, and the grounding rod 1 is perpendicular to the main shaft 6 after installation. The transmission assembly 20 adopts an upper group and a lower group of symmetrical crank arm 2 structures, and can obtain larger rotating torque by applying smaller force, thereby ensuring the reliability of the transmission assembly; whole cupboard earthing switch transverse arrangement multiunit, operating device, button etc. set up openly at the cabinet, and 6 sides of main shaft are drawn forth inconvenient use, through the compound mode of turning arm 2, U type spare 3, make the earth bar be ninety degrees mutually perpendicular with the switch is whole, have changed the orientation of operation, can draw forth from the front with other screens, button etc. set up together, the operation of being convenient for.
As an improved specific embodiment, a boss 8 in a 90-degree sector shape is arranged in the side wall of a sleeve hole of the connecting lever 2 and the pressing plate 13, a groove in a 90-degree sector shape is arranged on the main shaft 6 and the shaft body of the ground rod 1, and the boss 8 and the groove are mutually embedded when the connecting lever 2 is assembled with the main shaft 6 and the ground rod 1 and when the pressing plate 13 is assembled with the main shaft 6. The crank arm 2 is assembled with the main shaft 6, the ground rod 1 and the pressing sheet 13 with the main shaft 6 in the axial assembly and circumferential rotation transmission mode, so that the assembly and disassembly are convenient; the boss 8 in a sector shape of 90 degrees is embedded with the groove, so that the assembly is firmer; the contact part of the boss 8 and the groove is a plane which is mutually attached at two positions, so that the stress area of two parts of the plane is increased, and the transmission is more sufficient and stable during rotation.
As a modified embodiment, the upper and lower crank arms 2 respectively penetrate through the threaded holes 17 outwards from the side wall of the sleeve hole matched with the grounding rod 1 or the main shaft 6, the grounding rod 1 or the main shaft 6 is tightly jacked by screwing in the bolts matched with the threaded holes 17 during assembly, and the bolts are unscrewed for loosening during disassembly. Screw in screw hole bolt-up or lax mode with the bolt, simple structure, the assembly is convenient, and it is simple to dismantle, and the while strong reliability.
As a modified embodiment, the lower edge of the fixed contact 16 is provided with a chamfer 26, and the side edge is provided with a bump 25; the moving contact 15 is composed of two sheet bodies with a gap therebetween, and when the static contact 16 and the moving contact 15 are switched on, the two sheet bodies are guided to the projection 25 through the chamfer of the static contact 16. The static contact 16 is provided with a chamfer 26, so that the effect of guiding the moving contact 15 to be switched on is achieved during switching on, and the rotating switching-on process of the moving contact 15 is more reliable; the thickness of the convex block 25 is equivalent to the distance between the two structures of the movable contact 15, and the convex block 25 is clamped between the two structures of the movable contact 15 during switching on, so that the switching-on state of the static contact 16 and the movable contact 15 is more stable.
As a modified embodiment, the pressing sheets 13 are arranged in two groups, and are symmetrically arranged on both sides of the movable contact 15 to cooperate with the connecting pins 14 on both ends. Two groups of pressing pieces 13 are symmetrically arranged on two sides of the moving contact 15, so that the stress of the connecting pin 14 is balanced during rotation, and the displacement of the connecting pin 14 is limited through limiting grooves on two sides, so that the displacement of the connecting pin 14 is more reliable.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a earthing switch's drive mechanism, includes installation base (9), rotatable main shaft (6) that set up on installation base (9), establish moving contact (15) and fixed contact (16) of fixed mounting on installation base (9) on main shaft (6), moving contact (15) cooperate closing or separating brake, its characterized in that through rotation and fixed contact (16): the spring assembly is characterized by further comprising a spring assembly (21) and a pressing plate (13) which is arranged on the main shaft (6) and can rotate along with the main shaft (6), one end of the spring assembly (21) is rotatably installed on the installation base (9), the other end of the spring assembly is hinged with the moving contact (15) through a connecting pin (14), a limiting groove is formed in the edge of the pressing plate (13), a left boss (23) and a right boss (22) are formed at two ends of the limiting groove in a protruding mode, and the connecting pin (14) is located in the limiting groove; when the switch is switched on, the spring assembly (21) inclines to one side of the static contact (16), when the moving contact (15) and the static contact (16) are switched off from the switch-on state, the main shaft (6) rotates clockwise to drive the poking sheet (13) to rotate, the right boss (22) of the poking sheet (13) abuts against the connecting pin (14), the spring assembly (21) and the moving contact (15) are further driven to rotate to be far away from the static contact (16), the spring assembly (21) is stressed to store energy, when the spring assembly (21) reaches a maximum stress point after the switch is switched to a vertical angle, the spring assembly (21) rotates continuously and then inclines to one side opposite to the static contact (16) to release energy, and the connecting pin (14) slides to the left boss (23) along a limiting groove of the poking sheet (13) and then abuts against the poking sheet (13); when the moving contact (15) and the static contact (16) are switched on from an opening state, the main shaft (6) rotates anticlockwise to drive the pressing piece (13) to rotate; a left boss (23) of the pressing piece (13) abuts against the connecting pin (14), so that the spring assembly (21) and the moving contact (15) are driven to rotate to be close to the static contact (16), the spring assembly (21) is pressed to store energy, and the spring assembly (21) releases energy when rotating past a maximum stress point; the connecting pin (14) slides to the right boss (22) along the limiting groove of the poking and pressing piece (13) rapidly, so that the movable contact (15) can rotate rapidly to be switched on.
2. The drive mechanism of the earthing switch according to claim 1, characterized in that: the spring assembly (21) comprises a spring (11) and bases (12) which are respectively arranged at two ends of the spring (11), wherein cylindrical bosses are arranged at one end of each base (12) and penetrate into the spring (11); the other end of the upper base (12) is connected with the connecting pin (14), and the other end of the lower base (12) is rotatably connected with the mounting base (9).
3. The transmission mechanism of the earthing switch according to claim 1 or 2, characterized in that: the grounding rod is characterized by further comprising a transmission assembly (20), wherein the transmission assembly (20) comprises a grounding rod (1), an upper crank arm, a lower crank arm (2), an upper U-shaped piece, a lower U-shaped piece (3) and a pull rod (4), the grounding rod (1) is assembled on the upper crank arm (2), and the upper crank arm (2) is hinged with the upper U-shaped piece (3); the upper U-shaped part and the lower U-shaped part (3) are connected through a pull rod (4); the lower U-shaped part (3) is hinged on the lower crank arm (2); the lower crank arm (2) is assembled with the main shaft (6); the upper crank arm and the lower crank arm (2) are arranged at 90 degrees, and the grounding rod (1) is vertical to the main shaft (6) after installation.
4. The drive mechanism of the earthing switch according to claim 3, characterized in that: be equipped with in the trepanning lateral wall of turning arm (2), group preforming (13) and be 90 degrees sectorial boss (8), the axle body of main shaft (6) and ground pole (1) is equipped with and is 90 degrees sectorial recess, and turning arm (2) and main shaft (6) and ground pole (1) when assembling, group preforming (13) and main shaft (6) when assembling, boss (8) and recess gomphosis each other.
5. The drive mechanism of the earthing switch according to claim 3, characterized in that: two upper and lower turning arms (2) outwards run through threaded hole (17) with earthing rod (1), main shaft (6) complex trepanning lateral wall respectively, during the assembly through the bolt top tight earthing rod (1) or main shaft (6) of twist with threaded hole (17) looks adaptation, screw out the bolt when dismantling and relax.
6. The transmission mechanism of the earthing switch according to claim 1 or 2, characterized in that: a chamfer (26) is arranged at the lower edge of the static contact (16), and a lug (25) is arranged at the side edge; the moving contact (15) is composed of two sheet bodies with gaps between each other, and when the static contact (16) and the moving contact (15) are switched on, the two sheet bodies are clamped to the convex block (25) through the chamfer angle guide of the static contact (16).
7. The transmission mechanism of the earthing switch according to claim 1 or 2, characterized in that: the poking and pressing pieces (13) are arranged into two groups, and are symmetrically arranged on two sides of the moving contact (15) to be matched with the connecting pins (14) at two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921369149.1U CN210443483U (en) | 2019-08-22 | 2019-08-22 | Transmission mechanism of grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921369149.1U CN210443483U (en) | 2019-08-22 | 2019-08-22 | Transmission mechanism of grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210443483U true CN210443483U (en) | 2020-05-01 |
Family
ID=70409205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921369149.1U Active CN210443483U (en) | 2019-08-22 | 2019-08-22 | Transmission mechanism of grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210443483U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316094A (en) * | 2023-04-28 | 2023-06-23 | 佛山市博衡电气制造有限公司 | Power distribution cabinet |
-
2019
- 2019-08-22 CN CN201921369149.1U patent/CN210443483U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316094A (en) * | 2023-04-28 | 2023-06-23 | 佛山市博衡电气制造有限公司 | Power distribution cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211907362U (en) | Separated leakage protector | |
| CN101315848B (en) | Double-column horizontal rotation type high-voltage isolation switch | |
| CN210443483U (en) | Transmission mechanism of grounding switch | |
| EP4546385A1 (en) | Isolating switch closing energy storage mechanism and isolating switch | |
| CN111105940B (en) | Electric spring mechanism and grounding switch | |
| CN219738818U (en) | Remote brake separating mechanism and rotary isolating switch | |
| CN109243878B (en) | Three-position opening and closing operating mechanism of change-over switch | |
| CN104882313B (en) | The rigid separating brake interlocking mechanism of on-load switch fuse combined electric apparatus | |
| CN214956601U (en) | Operating mechanism and switch | |
| CN106992082B (en) | Circuit breaker operating mechanism and energy storage spring mounting structure thereof | |
| CN211045329U (en) | Interlocking device for earthing switch and cabinet door and switch cabinet | |
| CN209313304U (en) | A kind of overhead line wire clamp insulating shield provision for disengagement | |
| CN209981040U (en) | Operating mechanism of load switch | |
| CN214477182U (en) | Outdoor vacuum high-voltage circuit breaker convenient to installation | |
| CN206148356U (en) | Indoor interchange vacuum load switch | |
| CN103280381B (en) | Permanent magnet mechanism is placed in the outdoor AC high-voltage fall type subsector of main electric conductor inside | |
| CN107706037B (en) | High-voltage load switch | |
| CN206541766U (en) | A kind of elevator ultrathin type power lock | |
| CN215220627U (en) | A locking system for a switch operating mechanism | |
| CN108233242B (en) | 12kV high-voltage switch equipment | |
| CN210142594U (en) | Slow-breaking and slow-closing device of quick grounding switch | |
| CN210516512U (en) | Circuit breaker with earthing switch | |
| CN210837587U (en) | Mechanical interlocking structure used between grounding switch and isolating switch | |
| CN221466455U (en) | Energy storage structure and manual operating mechanism | |
| CN102426976B (en) | Spring energy storage mechanism for vacuum load switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |