CN217562498U - Energy storage type electric operating mechanism interlocking assembly - Google Patents
Energy storage type electric operating mechanism interlocking assembly Download PDFInfo
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- CN217562498U CN217562498U CN202221503803.5U CN202221503803U CN217562498U CN 217562498 U CN217562498 U CN 217562498U CN 202221503803 U CN202221503803 U CN 202221503803U CN 217562498 U CN217562498 U CN 217562498U
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Abstract
The utility model relates to an energy storage formula electric operating mechanism's interlocking assembly, including framework, setting interlocking subassembly, the casing of shroud on the framework, interlocking subassembly including slide setting up manual ejector pad on the framework, be used for controlling electric operating mechanism's motor circular telegram or the micro-gap switch group of outage, with manual ejector pad linkage complex connecting rod, with connecting rod linkage complex rocking arm, manual ejector pad can trigger micro-gap switch group, and can realize the switch-on or the disconnection of micro-gap switch group, the one end of rocking arm have with the protruding spacing portion of operating handle matched with cambered surface, the protruding spacing portion of cambered surface along with the rocking arm action and but the lock in the arc recess of operating handle one end, and constitute the protruding spacing cooperation of spacing portion of cambered surface and operating handle. The utility model has the advantages of simple structure, stable performance, reliable performance, simple operation, high security.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to energy storage formula electric operating mechanism's interlocking assembly.
Background
The breaker is a switching device used for a distribution electrical appliance in a power grid, can connect, bear and break the current under normal circuit conditions, and can also connect, bear and break the current for a certain time under specified abnormal conditions (such as overload, short circuit, undervoltage and single-phase earth fault). The electric operating mechanism is a special fitting for the plastic shell type circuit breaker, and can electrically close, open and detain the circuit breaker again in a long distance after being matched with the circuit breaker so as to realize the centralized and automatic control of the power transmission and distribution network. In order to ensure the personal safety of maintenance personnel and avoid misoperation, the existing energy storage type electric operating mechanisms of the circuit breakers are all provided with interlocking assemblies which can avoid other people to randomly open or close the circuit breakers, however, the structural design of the existing interlocking assemblies is unreasonable, the interlocking of the interlocking assemblies is unreliable, and even potential safety hazards exist, so that the interlocking assemblies have the defects of complex structure, unstable performance, lower safety and inconvenient operation.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance is reliable, simple operation, high energy storage formula electric operating mechanism's of security interlock assembly.
For realizing above-mentioned mesh, the utility model discloses an energy storage formula electric operating mechanism's interlocking assembly, including framework, setting interlocking subassembly, the casing of shroud on the framework, interlocking subassembly including slide setting up manual ejector pad on the framework, be used for controlling electric operating mechanism's motor circular telegram or the micro-gap switch group of outage, with manual ejector pad linkage complex connecting rod, with connecting rod linkage complex rocking arm, manual ejector pad can trigger micro-gap switch group, and can realize the switch-on or the disconnection of micro-gap switch group, the one end of rocking arm have with operating handle matched with spacing portion of cambered surface arch, spacing portion of cambered surface arch along with the rocking arm action and can the lock in the arc recess of operating handle one end, and constitute spacing cooperation of spacing portion of cambered surface arch and operating handle.
The beneficial effect of above-mentioned structure is: the interlocking assembly adopts a rocker arm type structural design, is simple in structural design and reliable in interlocking, can lock the electric and manual switching-on functions of the energy storage type electric operating mechanism, locks the circuit breaker in a tripping state, can avoid misoperation and guarantees the personal safety of maintenance personnel. When the manual pushing block is shifted to the electric position during operation, the manual pushing block drives the rocker arm to rotate through the connecting rod, the rocker arm abuts against the operating handle, and the operating handle can be locked by the rocker arm, so that a user cannot perform manual operation; this locking assembly can be with electronic function, manual function locking, can effectively avoid the maloperation, and the security performance is higher. Therefore, the interlocking assembly of the energy storage type electric operating mechanism has the advantages of simple structure, stable and reliable performance, convenience in operation and high safety.
Particularly, the mechanism frame is provided with a tripping locking assembly matched with the tripping button, the tripping locking assembly comprises a padlock plate and a linkage plate, the padlock plate is arranged on the mechanism frame in a sliding mode, the linkage plate is matched with the padlock plate in a linkage mode, the linkage plate acts along with the padlock plate and can abut against the tripping button rod, and the linkage plate and the tripping button rod are locked. When the manual push block is shifted to a manual position (the electric function is closed), the padlock sheet is pulled up and hung on the padlock, the padlock sheet can drive the linkage plate to act, the linkage plate abuts against the tripping button rod, and the tripping button rod can keep the circuit breaker in a tripping state, so that the electric operating mechanism cannot be manually and electrically switched on, and the locking of the energy storage type electric operating mechanism can be realized.
Particularly, the manual push block is respectively provided with an interlocking block matched with the tripping button rod and the closing button rod, when the manual push block slides to an electric position, the interlocking block is abutted against the tripping button rod and the closing button rod, locking of the interlocking block with the tripping button rod and the closing button rod can be realized, the tripping button rod and the closing button rod are respectively provided with a yielding groove matched with the interlocking block, when the manual push block slides to the manual position, the interlocking block slides to the yielding groove, and unlocking of the interlocking block with the tripping button rod and the closing button rod can be realized. When the manual push block is shifted to the electric position, the interlocking block of the manual push block can lock the tripping button rod and the closing button rod, so that a user cannot manually press the tripping button rod and the closing button rod to realize the locking of manual operation.
Especially, padlock piece one side be provided with the guiding hole, the framework on be provided with guiding hole matched with guide post, the guide post alternate in the guiding hole, and constitute the sliding connection cooperation of padlock piece and guide post, the opposite side of padlock piece is provided with the guide block, the framework on be provided with guide block matched with guide way, the guide block along with the action of padlock piece and can be at the reciprocating motion in the guide way, and be provided with the extension spring between padlock piece and the framework, the one end of padlock piece pull handle portion that has the locking hole of passing the casing. The padlock plate and the mechanism frame are assembled in a clamping fit mode, so that the padlock plate and the mechanism frame are convenient to assemble, the assembly efficiency is higher, the reliable action of the padlock plate on the mechanism frame can be guaranteed, and the improvement of the working reliability of the interlocking assembly is facilitated.
Particularly, the other end of the rocker arm is provided with a positioning hole which is rotatably arranged on a positioning shaft of the machine frame, the rocker arm is provided with a guide sliding hole, the machine frame is provided with a guide rod inserted in the guide sliding hole, and when the rocker arm rotates, the guide rod can reciprocate in the guide sliding hole. The rocker arm is arranged on the positioning shaft of the mechanism frame in a rotating mode, so that the rocker arm and the mechanism frame are convenient to assemble, the assembly is more convenient, the rocker arm can be guaranteed to act reliably, and the improvement of the working reliability of the interlocking assembly is facilitated.
Particularly, the linkage board on be provided with the locator card hole, the locator card hole rotates and sets up on the locating piece of framework, the one end of linkage board have with dropout button lever matched with cambered surface conflict portion, cambered surface conflict portion along with the linkage board action and can contradict on the stopper of dropout button lever, and constitute linkage board and the spacing of dropout button lever join in marriage, the other end of linkage board padlock piece cooperation cambered surface linkage portion has, the padlock on be provided with cambered surface lug with cambered surface linkage portion complex, cambered surface lug along with the padlock piece action and can contradict in cambered surface linkage portion, and constitute the linkage cooperation of padlock piece and linkage board. The linkage plate is rotatably arranged on the machine frame, so that the linkage plate and the machine frame are convenient to assemble, the cambered surface abutting part abuts against the tripping button rod, the linkage plate and the tripping button rod can be reliably locked, the cambered surface lug on the padlock sheet abuts against the cambered surface linkage part, clamping stagnation and locking cannot occur between the padlock sheet and the linkage plate, and the transmission between the padlock sheet and the linkage plate is more reliable.
Particularly, the micro switch group comprises a support arranged on the framework and a micro switch arranged in the support, a shifting lever is arranged on the manual pushing block in a linkage mode, the shifting lever acts along with the manual pushing block and can trigger the micro switch, and the micro switch is switched on or off. The manual push block triggers the microswitch through the deflector rod, so that the transmission between the manual push block and the microswitch is more reliable, and the working reliability of the interlocking assembly is improved.
Particularly, the support is provided with a guide protruding strip, the manual push block is provided with a guide rail groove which is arranged on the guide protruding strip in a sliding mode, the manual push block is provided with a shifting block which is arranged in a switching hole of the shell in a sliding mode, the other end of the manual push block is provided with a sliding block, the framework is provided with a sliding hole matched with the sliding block, and the sliding block moves along with the manual push block and can reciprocate in the sliding hole and forms sliding connection matching of the sliding block and the framework. The manual pushing block is connected with the support in a sliding connection matching mode, so that the manual pushing block is convenient to assemble with the support, the manual pushing block can be guaranteed to reliably act on the support, and the working reliability of the interlocking assembly is improved.
Particularly, the manual push block is provided with an elastic switching block, the support is respectively provided with a first positioning hole and a second positioning hole which are matched with the elastic switching block, the elastic switching block acts with the manual push block, and the elastic switching block can be switched between the first positioning hole and the second positioning hole in a reciprocating mode. When the elastic switching block of the manual push block is clamped in the first positioning hole, the microswitch is switched off, and the electric function is switched off, so that the energy storage type electric operating mechanism can be manually operated; when the elastic switching block of the manual push block is clamped in the second positioning hole, the micro switch hook is switched on, the electric function is switched on, the manual push block drives the rocker arm through the connecting rod, the rocker arm is abutted against the operating handle, and the operating handle cannot rotate, so that the energy storage type operating mechanism cannot be operated manually.
Drawings
Fig. 1 is a perspective view of an energy storage type electric operating mechanism according to an embodiment of the present invention.
Fig. 2 is an exploded view of the energy storage type electric operating mechanism according to the embodiment of the present invention.
Fig. 3 is an internal structure diagram of the energy storage type electric operating mechanism according to the embodiment of the present invention.
Fig. 4 is an assembly view of the manual pushing block and the locking plate of the embodiment of the present invention.
Fig. 5 is a perspective view of the operation handle according to the embodiment of the present invention.
Fig. 6 is a perspective view of the linkage plate according to the embodiment of the present invention.
Fig. 7 is a perspective view of the manual pushing block according to the embodiment of the present invention.
Fig. 8 is a perspective view of a rocker arm according to an embodiment of the present invention.
Fig. 9 is a perspective view of a micro switch assembly according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-9, the embodiment of the present invention is an interlock assembly of energy storage type electric operating mechanism, including framework 10, interlock component 20, casing 11 of shroud on framework 10, interlock component 20 including slide setting up manual ejector pad 21 on framework 10, micro-gap switch group 22 for controlling the motor of electric operating mechanism to switch on or switch off, connecting rod 23 with manual ejector pad 21 linkage complex, rocking arm 24 with connecting rod 23 linkage complex, manual ejector pad 21 can trigger micro-gap switch group 22, and can realize the switch-on or switch-off of micro-gap switch group 22, one end of rocking arm 24 have with operating handle 12 matched with protruding spacing portion 241 of cambered surface, protruding spacing portion 241 of cambered surface move along with rocking arm 24 and can lock in the arc recess 121 of operating handle 12 one end, and constitute the spacing cooperation of protruding spacing portion 241 of cambered surface and operating handle 12. The arc-surface protruding limiting part of the rocker arm is buckled in the arc-shaped groove of the operating handle, so that the rocker arm can be ensured to be capable of reliably locking the operating handle, the rocker arm and the operating handle are more reliably interlocked, and the working reliability of the interlocking assembly is improved.
As shown in fig. 3, 4 and 6, the mechanism frame 10 is provided with a trip locking assembly 250 matched with the trip button 27, the trip locking assembly 250 includes a padlock plate 25 slidably disposed on the mechanism frame 10 and a linkage plate 26 in linkage fit with the padlock plate 25, the linkage plate 26 acts along with the padlock plate 25 and can abut against the trip button rod 27, and the linkage plate 26 and the trip button rod 27 are locked. When the manual pushing block is shifted to a manual position (the electric function is closed), the padlock sheet is pulled up and hung on the padlock, the padlock sheet can drive the linkage plate to act, the linkage plate is abutted to the tripping button rod, and the tripping button rod can keep the circuit breaker in a tripping state, so that the electric operating mechanism can not be manually and electrically switched on, and the locking of the energy storage type electric operating mechanism can be realized. The manual push block 21 is respectively provided with an interlocking block 213 matched with the trip button rod 27 and the closing button rod 28, when the manual push block 21 slides to an electric position, the interlocking block 213 is abutted against the trip button rod 27 and the closing button rod 28, and can realize locking of the interlocking block 213 with the trip button rod 27 and the closing button rod 28, the trip button rod 27 and the closing button rod 28 are respectively provided with an abdicating groove 270 matched with the interlocking block 213, when the manual push block 21 slides to a manual position, the interlocking block 213 slides to the abdicating groove 270, and can realize unlocking of the interlocking block 213 with the trip button rod 27 and the closing button rod 28. When the manual push block is shifted to the electric position, the interlocking block of the manual push block can lock the tripping button rod and the closing button rod, so that a user cannot manually press the tripping button rod and the closing button rod to realize the locking of manual operation. Padlock piece 25 one side be provided with guiding hole 254, mechanism frame 10 on be provided with guiding hole 254 matched with guide post 101, guide post 101 alternate in guiding hole 254, and constitute the sliding connection cooperation of padlock piece 25 and guide post 101, the opposite side of padlock piece 25 is provided with guide block 255, mechanism frame 10 on be provided with guide block 255 matched with guide way 102, guide block 255 along with the action of padlock piece 25 and can be in guide way 102 reciprocating motion, and be provided with extension spring 29 between padlock piece 25 and mechanism frame 10, the one end of padlock piece 25 pull handle portion 250 that has the locking hole 111 that passes casing 11. The padlock piece is provided with padlock hole 251 corresponding to handle portion, and the padlock piece adopts the joint fit mode assembly with the framework, the assembly of padlock piece and framework of being convenient for, and assembly efficiency is higher, and can guarantee that the padlock piece can reliably move on the framework, is favorable to improving the operational reliability of this interlocking assembly. The other end of the swing arm 24 is provided with a positioning hole 242, the positioning hole 242 is rotatably arranged on the positioning shaft 103 of the mechanism frame 10, the swing arm 24 is provided with a guide sliding hole 243, the mechanism frame 10 is provided with a guide rod 104 inserted in the guide sliding hole 243, and when the swing arm 24 rotates, the guide rod 104 can reciprocate in the guide sliding hole 243. The rocker arm is rotatably arranged on the positioning shaft of the mechanism frame, so that the rocker arm and the mechanism frame are convenient to assemble, the assembly is more convenient, the reliable action of the rocker arm can be ensured, and the working reliability of the interlocking assembly is improved.
As shown in fig. 2, 3, 6, and 7, the linkage plate 26 is provided with a positioning hole 261, the positioning hole 261 is rotatably disposed on the positioning block 105 of the frame 10, one end of the linkage plate 26 has an arc-shaped abutting portion 262 cooperating with the trip button rod 27, the arc-shaped abutting portion 262 moves along with the linkage plate 26 and can abut against the limiting block 271 of the trip button rod 27, and constitutes a limiting fit between the linkage plate 26 and the trip button rod 27, the other end of the linkage plate 26 has an arc-shaped interlocking portion 263 cooperating with the locking plate 25, the locking plate 25 is provided with an arc-shaped protrusion 256 cooperating with the arc-shaped interlocking portion 263, the arc-shaped protrusion 256 moves along with the locking plate 25 and can abut against the arc-shaped interlocking portion 263, and constitutes a linkage fit between the locking plate 25 and the linkage plate 26. The linkage plate is rotatably arranged on the machine frame, so that the linkage plate and the machine frame are convenient to assemble, the cambered surface abutting part abuts against the tripping button rod, the linkage plate and the tripping button rod can be reliably locked, the cambered surface lug on the padlock sheet abuts against the cambered surface linkage part, clamping stagnation and locking cannot occur between the padlock sheet and the linkage plate, and the transmission between the padlock sheet and the linkage plate is more reliable. The micro switch group 22 comprises a bracket 221 arranged on the frame 10 and a micro switch 222 arranged in the bracket 221, the manual push block 21 is provided with a shift lever 30 in a linkage manner, and the shift lever 30 acts along with the manual push block 21 and can trigger the micro switch 222 to realize the connection or disconnection of the micro switch 222. The manual push block triggers the microswitch through the deflector rod, so that the transmission between the manual push block and the microswitch is more reliable, and the working reliability of the interlocking assembly is improved. The support 221 on be provided with direction sand grip 223, manual ejector pad 21 on have the guide rail groove 214 of slip setting on direction sand grip 223, and manual ejector pad 21 on have the setting of slip in switching hole 112 of casing 11 and stir the piece 215, manual ejector pad 21 on the other end on be provided with slider 216, mechanism frame 10 on be provided with the slide hole 106 with slider 216 matched with, slider 216 follow the action of manual ejector pad 211 and can reciprocate in slide hole 106, and constitute the sliding connection cooperation of slider 215 and mechanism frame 10. The manual pushing block is connected with the support in a sliding connection matching mode, so that the manual pushing block is convenient to assemble with the support, the manual pushing block can be guaranteed to reliably act on the support, and the working reliability of the interlocking assembly is improved. The manual push block 21 is provided with an elastic switching block 217, the bracket 221 is provided with a first positioning hole 224 and a second positioning hole 225 respectively, the first positioning hole 224 and the second positioning hole 225 are matched with the elastic switching block 217, the elastic switching block 217 acts with the manual push block 21, and the elastic switching block 217 can be switched between the first positioning hole 224 and the second positioning hole 225 in a reciprocating manner. When the elastic switching block of the manual push block is clamped in the first positioning hole, the microswitch is switched off, and the electric function is switched off, so that the energy storage type electric operating mechanism can be manually operated; when the elastic switching block of the manual pushing block is clamped in the second positioning hole, the micro-switch hook is switched on, the electric function is switched on, the manual pushing block drives the rocker arm through the connecting rod, the rocker arm is abutted to the operating handle, and the operating handle cannot rotate, so that the energy storage type operating mechanism cannot be operated manually.
The interlocking assembly adopts a rocker arm type structural design, is simple in structural design and reliable in interlocking, can lock the electric and manual switching-on functions of the energy storage type electric operating mechanism, locks the circuit breaker in a tripping state, can avoid misoperation and guarantees the personal safety of maintenance personnel. When the manual push block is shifted to the electric position during operation, the manual push block drives the rocker arm to rotate through the connecting rod, the rocker arm abuts against the operating handle, and the operating handle can be locked by the rocker arm, so that a user cannot perform manual operation; when the manual push block is shifted to a manual position (the electric function is closed), the padlock sheet is pulled up and hung on the padlock, the padlock sheet can drive the linkage plate to act, the linkage plate abuts against the tripping button rod, and the tripping button rod can keep the circuit breaker in a tripping state, so that the electric operating mechanism cannot be manually and electrically switched on, and the locking of the energy storage type electric operating mechanism can be realized. This locking assembly can be with electronic function, manual function locking, can effectively avoid the maloperation, and the security performance is higher. Therefore, the interlocking assembly of the energy storage type electric operating mechanism has the advantages of simple structure, stable and reliable performance, convenience in operation and high safety.
Claims (9)
1. An interlock assembly of an energy storage type electric operating mechanism comprises a framework, an interlock component arranged on the framework, and a shell covering the framework, and is characterized in that: interlock subassembly including slide setting up manual ejector pad on the framework, be used for controlling the motor circular telegram of electric operating mechanism or the micro-gap switch group of outage, with manual ejector pad linkage complex connecting rod, with connecting rod linkage complex rocking arm, manual ejector pad can trigger micro-gap switch group, and can realize micro-gap switch group's switch-on or disconnection, the one end of rocking arm have with the protruding spacing portion of operating handle matched with cambered surface, the protruding spacing portion of cambered surface along with the rocking arm action and but the lock is in the arc recess of operating handle one end, and constitute the protruding spacing portion of cambered surface and operating handle's spacing cooperation.
2. The interlock assembly of a stored energy electrically operated mechanism according to claim 1 wherein: the mechanical framework is provided with a tripping locking assembly matched with the tripping button, the tripping locking assembly comprises a padlock plate and a linkage plate, the padlock plate is arranged on the mechanical framework in a sliding mode, the linkage plate is matched with the padlock plate in a linkage mode, the linkage plate acts along with the padlock plate and can be abutted to the tripping button rod, and the linkage plate and the tripping button rod are locked.
3. The interlock assembly of the energy storing electric operating mechanism according to claim 1 or 2, wherein: the manual push block is respectively provided with an interlocking block matched with the tripping button rod and the closing button rod, when the manual push block slides to an electric position, the interlocking block is abutted against the tripping button rod and the closing button rod, and can lock the interlocking block with the tripping button rod and the closing button rod, the tripping button rod and the closing button rod are respectively provided with a yielding groove matched with the interlocking block, when the manual push block slides to the manual position, the interlocking block slides to the yielding groove, and can unlock the interlocking block, the tripping button rod and the closing button rod.
4. The interlock assembly of a stored energy electrically operated mechanism according to claim 2 wherein: padlock piece one side be provided with the guiding hole, the framework on be provided with guiding hole matched with guide post, the guide post alternate in the guiding hole, and constitute the sliding connection cooperation of padlock piece and guide post, the opposite side of padlock piece is provided with the guide block, the framework on be provided with guide block matched with guide way, the guide block along with the action of padlock piece and can be at the reciprocating motion of guide way, and be provided with the extension spring between padlock piece and the framework, the one end of padlock piece the handle portion that has the locking hole of passing the casing.
5. The interlock assembly of a stored energy electrically operated mechanism according to claim 2 wherein: the other end of the rocker arm is provided with a positioning hole, the positioning hole is rotatably arranged on a positioning shaft of the machine frame, the rocker arm is provided with a guide sliding hole, the machine frame is provided with a guide rod inserted in the guide sliding hole, and when the rocker arm rotates, the guide rod can reciprocate in the guide sliding hole.
6. The interlock assembly of a stored energy electrically operated mechanism according to claim 2 wherein: the linkage board on be provided with the locator card hole, the locator card hole rotates and sets up on the locating piece of framework, the one end of linkage board have with dropout button lever matched with cambered surface conflict portion, cambered surface conflict portion along with linkage board action and can conflict on the stopper of dropout button lever, and constitute linkage board and the spacing of dropout button lever and join in marriage, the other end of linkage board padlock piece cooperation cambered surface linkage portion has, the padlock on be provided with cambered surface linkage portion complex cambered surface lug, cambered surface lug along with the action of padlock piece and can conflict in cambered surface linkage portion, and constitute the linkage cooperation of hanging locking plate and linkage board.
7. The interlock assembly of the energy storing electric operating mechanism according to claim 1 or 2, wherein: the micro switch group comprises a support arranged on the framework and a micro switch arranged in the support, a shifting lever is arranged on the manual pushing block in a linkage mode, the shifting lever acts along with the manual pushing block and can trigger the micro switch, and the micro switch is switched on or off.
8. The interlock assembly of the stored energy electric operating mechanism of claim 7, wherein: the support on be provided with the direction sand grip, manual ejector pad on have the guide rail groove of slip setting on the direction sand grip, and have the slip setting on manual ejector pad and stir the piece in the switching hole of casing, the other end of manual ejector pad on be provided with the slider, the framework on be provided with the sliding hole with slider matched with, the slider move and can be at the reciprocating motion in the sliding hole along with manual ejector pad, and constitute the sliding connection cooperation of slider and framework.
9. The interlock assembly of the stored energy electrically operated mechanism of claim 8 wherein: the manual push block is provided with an elastic switching block, the support is provided with a first positioning hole and a second positioning hole which are matched with the elastic switching block respectively, the elastic switching block moves along with the manual push block, and the elastic switching block can be switched between the first positioning hole and the second positioning hole in a reciprocating mode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202221503803.5U CN217562498U (en) | 2022-06-16 | 2022-06-16 | Energy storage type electric operating mechanism interlocking assembly |
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Application Number | Priority Date | Filing Date | Title |
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CN202221503803.5U CN217562498U (en) | 2022-06-16 | 2022-06-16 | Energy storage type electric operating mechanism interlocking assembly |
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CN217562498U true CN217562498U (en) | 2022-10-11 |
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CN202221503803.5U Active CN217562498U (en) | 2022-06-16 | 2022-06-16 | Energy storage type electric operating mechanism interlocking assembly |
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2022
- 2022-06-16 CN CN202221503803.5U patent/CN217562498U/en active Active
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