Switching device
By designing the transmission mechanism in the switching equipment, and using the cooperation of the delay component and the bracket, the problem of uncertain timing of the main and pre-charge in the pre-charge switch equipment is solved, and more reliable timing control and command simplification is achieved.
Patent Information
- Application Number
- CN202421188060.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In a switching device containing a precharge switch module, it is difficult to strictly ensure the sequence of the main closing and precharge, resulting in uncertain timing of the precharge contact opening after the movable contact is closed.
A transmission mechanism is designed, including a first push rod, a delay assembly and a bracket. When the driving contact is driven to rotate to the closing position by the spindle, the delay assembly is triggered to drive the bracket to rotate from the prefilled closed position with the prefilled contact to the prefilled disconnected position within a predetermined time.
The mechanical structure ensures the pre-full function of the main closing, simplifies instructions, reduces the possible failure of the main closing position feedback, and more reliably ensures the timing of the pre-charge contact re-opening after the movable contact is closed.
Smart Images
Figure CN222562594U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a switchgear. Background Art
[0002] In a switch device including a pre-charging switch module, during the closing of the circuit breaker module, after the pre-charging moving contact of the pre-charging switch module is closed, it is necessary to determine whether the pre-charging moving contact is closed. If the result is yes, an electronic instruction is sent to close the moving contact of the circuit breaker module. After the moving contact is closed, an electronic instruction is sent to open the moving contact of the pre-charging switch.
[0003] However, this requires a separate electronic command to open the moving contacts of the pre-charge switch, and may not be able to strictly guarantee the timing of the main closing and pre-charging. Utility Model Content
[0004] The present application provides a switch device, comprising: a circuit breaker module, having an operating handle and a breaking unit, the breaking unit comprising a main shaft, a moving contact and a stationary contact, the operating handle being operably connected to the main shaft, so that the main shaft can rotate under the rotation drive of the operating handle, the moving contact being mounted on the main shaft, and being able to rotate between a closed position and an open position with the rotation of the main shaft, in the closed position, the moving contact is in contact with the stationary contact, and in the open position, the moving contact is separated from the stationary contact; a pre-charged switch module, detachably mounted to the circuit breaker module, the pre-charged switch module having a housing, a pre-charged switch module and a pre-charged switch module; A charging moving contact and a pre-charging static contact, the pre-charging moving contact can rotate between a pre-charging closed position and a pre-charging disconnected position, in the pre-charging closed position, the pre-charging moving contact is in contact with the pre-charging static contact, and in the pre-charging disconnected position, the pre-charging moving contact is separated from the pre-charging static contact; a transmission mechanism, which is operably arranged between the circuit breaker module and the pre-charging switch module, and is configured to be driven by the main shaft during the period when the main shaft carries the moving contact to rotate from the open position to the closed position, so that after the moving contact rotates from the open position to the closed position, the pre-charging moving contact rotates from the pre-charging closed position to the pre-charging disconnected position.
[0005] Advantageously, the transmission mechanism comprises:
[0006] a first push rod pivotally disposed on a housing of the circuit breaker module;
[0007] A delay assembly is pivotably disposed in a housing of the pre-charge switch module, and a first push rod is operably connected between a main shaft of the circuit breaker module and the delay assembly, and is configured to be driven by the main shaft during the period when the main shaft rotates with the moving contact from the open position to the closed position, thereby triggering the delay assembly;
[0008] A bracket is pivotally arranged at a first pivot point in the housing of the pre-charge switch module, carrying the pre-charge moving contact. The bracket is operably connected to the delay component so that within a predetermined time after the delay component is triggered, the delay component drives the bracket to pivot to rotate the pre-charge moving contact from the pre-charge closed position to the pre-charge open position.
[0009] Advantageously, the delay component comprises:
[0010] A second push rod is pivotally disposed at a first pivot point in the housing of the pre-fill switch module, and can be pivoted from a first position to a second position along a predetermined direction under the push of the first push rod, wherein the first position corresponds to a pre-fill closed position, and the second position corresponds to a pre-fill disconnected position;
[0011] A third push rod is pivotally disposed at a first pivot point in a housing of the pre-fill switch module, a first torsion spring is disposed between the second push rod and the third push rod, the third push rod is configured to be able to pivot from a third position to a fourth position along a predetermined direction under the action of the first torsion spring, the third position corresponds to a pre-fill closed position, the fourth position corresponds to a pre-fill disconnected position, the second push rod and the bracket are disposed on opposite sides of the third push rod;
[0012] The blocking member is pivotally arranged in the housing of the pre-filling switch module at a second pivot point different from the first pivot point, and can be pivoted between a blocking position and a non-blocking position in a predetermined direction. In the blocking position, the blocking member abuts against the third push rod to prevent the third push rod from rotating. In the non-blocking position, the blocking member is disengaged from the abutment against the third push rod to allow the third push rod to rotate.
[0013] When the main shaft rotates to the closing position with the moving contact, the first push rod is driven by the main shaft, so that the second push rod pivots from the first position to the second position. After the second push rod pivots a first predetermined angle, the second push rod abuts against the blocking member and drives the blocking member to pivot from the blocking position to the non-blocking position. As a result, the third push rod pivots from the third position to the fourth position along a predetermined direction under the action of the first torsion spring. After the third push rod pivots a second predetermined angle, the third push rod abuts against the bracket and drives the bracket to rotate with the pre-charged moving contact from the pre-charged closed position to the pre-charged disconnected position.
[0014] Advantageously, the third push rod has a first protrusion extending toward the second push rod, the second push rod has a first notch, the first protrusion protrudes into the first notch, and in the third position and the fourth position of the third push rod, the downstream end of the first protrusion located downstream in the predetermined direction abuts against the downstream end of the first notch located downstream in the predetermined direction,
[0015] Among them, when the main shaft rotates to the closing position with the moving contact, the first push rod is driven by the main shaft, so that the second push rod pivots from the first position to the second position, so that the downstream end of the first protrusion disengages from the abutment with the downstream end of the first notch. When the second push rod pivots to the second position and the third push rod pivots to the fourth position, the downstream end of the first protrusion abuts against the downstream end of the first notch.
[0016] Advantageously, the third push rod has a second protrusion extending toward the bracket, the bracket has a second notch, and the second protrusion protrudes into the second notch, so that in the third position of the third push rod, the upstream end of the second protrusion located upstream in the predetermined direction abuts against the upstream end of the second notch located upstream in the predetermined direction, and in the fourth position of the third push rod, the downstream end of the second protrusion located downstream in the predetermined direction abuts against the downstream end of the second notch located downstream in the predetermined direction.
[0017] Among them, when the third push rod pivots at a predetermined angle in a predetermined direction, the upstream end of the second protrusion of the third push rod disengages from the abutment with the upstream end of the second notch, and then the downstream end of the second protrusion abuts against the downstream end of the second notch, thereby pushing the bracket to rotate with the pre-charge moving contact from the pre-charge closed position to the pre-charge disconnected position.
[0018] Advantageously, the delay assembly also includes a second torsion spring arranged between the third push rod and the bracket, and the second torsion spring is configured to provide a biasing force for the upstream end of the second protrusion to abut against the upstream end of the second notch in the third position of the third push rod; and to provide a biasing force for the downstream end of the second protrusion to abut against the downstream end of the second notch in the fourth position of the third push rod.
[0019] Advantageously, the delay assembly further comprises a return spring connected to the blocking member and configured to provide a restoring force of the blocking member from the non-blocking position to the blocking position.
[0020] Advantageously, the transmission mechanism also includes a pre-charge switch spring, one end of which is connected to the third push rod and the other end is connected to the housing of the pre-charge switch module. During the period when the second push rod pivots from the first position toward the second position along a predetermined direction so that the final bracket with the pre-charge moving contact pivots from the pre-charge closed position to the pre-charge open position, when the bracket with the pre-charge moving contact rotates to the pre-charge switch spring passing the dead point position, the pre-charge switch spring provides power for the bracket to continue rotating. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The above and other features and advantages of the exemplary embodiments of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present invention in any way, wherein:
[0022] Figure 1A schematic diagram of a switch device according to the present application is shown, in which the circuit breaker module is in an open state and the pre-charge switch module is in a pre-charge disconnected state.
[0023] Figure 2 A schematic diagram of a pre-charging switch module according to the present application is shown, at which point the pre-charging moving contact of the pre-charging switch module is in a pre-charging closed position.
[0024] Figure 3 An exploded view of a pre-charge switch module according to the present application is shown.
[0025] Figure 4 A schematic diagram of a pre-charging switch module according to the present application is shown. At this time, the circuit breaker module is in an open state, and the pre-charging moving contact of the pre-charging switch module is in a pre-charging closed position.
[0026] Figure 5 and 6 Both show schematic diagrams of the pre-charging switch module according to the present application, at which time the circuit breaker module is in a closed state, and the delay component of the pre-charging switch module begins to trigger.
[0027] Figure 7 A schematic diagram of a pre-fill switch module according to the present application is shown, at which time the blocking member of the delay assembly of the pre-fill switch module is pivoted from a blocking position to a non-blocking position.
[0028] Figure 8 and 9 Both show schematic diagrams of the pre-charging switch module according to the present application, at which time the circuit breaker module is in a closed state, and the pre-charging moving contact of the pre-charging switch module is in a pre-charging disconnecting position.
[0029] Fig.10 An exploded view of a delay component of a pre-charge switch module according to the present application is shown. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0031] Compared to the embodiments shown in the drawings, feasible implementations within the scope of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0032] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, words such as "one", "the", "said" and the like do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" and the like mean that the element or object appearing before the word includes the element or object listed after the word and its equivalent, without excluding other elements or objects. Words such as "install", "set", "connect" or "connected" and the like are not limited to physical or mechanical installation, setting, connection, but may include electrical installation, setting, connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate the relative position relationship when the device is in use or the position relationship shown in the drawings. When the absolute position of the described object changes, the relative position relationship may also change accordingly.
[0033] Figure 1 A schematic diagram of a switchgear according to the utility model is shown. The switchgear comprises a circuit breaker module 1, a transmission mechanism 3 and a pre-charged switch module 2. The circuit breaker module has an operating handle 11 and a breaking unit, the breaking unit comprises a main shaft 12, a moving contact and a stationary contact, the operating handle 11 is operably connected to the main shaft 12, so that the main shaft 12 can rotate under the rotation drive of the operating handle 11, the moving contact is mounted on the main shaft, and can rotate between a closed position and an open position with the rotation of the main shaft, in the closed position, the moving contact is in contact with the stationary contact, and in the open position, the moving contact is separated from the stationary contact.
[0034] As for the operating handle 11 being operably connected to the main shaft 12, those skilled in the art will understand that the rotation of the operating handle 11 is transmitted to the main shaft 12 through the transmission assembly, thereby driving the main shaft 12 to rotate. Furthermore, those skilled in the art will understand that the transmission assembly between the operating handle 11 and the main shaft 12 has an energy storage main spring, and the rotation of the operating handle will charge the energy storage main spring. When the operating handle 11 is rotated from the open position to the closed position, in the presence of a pre-charged switch module and the pre-charging is successful, the energy storage main spring will begin to release energy to allow the main shaft 12 to start rotating. How the operating handle 11 drives the main shaft 12 to rotate is well known to those skilled in the art, and therefore, it will not be described in detail herein.
[0035] The pre-charging switch module 2 can be detachably mounted to the circuit breaker module, that is, when the pre-charging function is required, the pre-charging switch module can be installed to the circuit breaker module for use, and when the pre-charging function is not required, the pre-charging switch module can be detached from the circuit breaker module. Figure 2 As shown, the pre-charging switch module 2 has a housing 21, a pre-charging moving contact 22 and a pre-charging static contact 23. The pre-charging moving contact can rotate between a pre-charging closed position and a pre-charging open position. In the pre-charging closed position, the pre-charging moving contact is in contact with the pre-charging static contact. In the pre-charging open position, the pre-charging moving contact is separated from the pre-charging static contact.
[0036] The transmission mechanism 3 is operably arranged between the main shaft 12 of the circuit breaker module and the pre-charge moving contact 22 of the pre-charge switch module, and is configured to be driven by the main shaft 12 during the period when the main shaft carries the moving contact to rotate from the open position to the closed position, so that after the moving contact rotates from the open position to the closed position, the pre-charge moving contact rotates from the pre-charge closed position to the pre-charge open position.
[0037] The transmission mechanism 3 includes: a first push rod 31, which is pivotally arranged on the housing of the circuit breaker module; a delay assembly 32, which is pivotally arranged in the housing of the pre-charge switch module, the first push rod 31 is operably connected between the main shaft 12 of the circuit breaker module and the delay assembly 32, and is configured to be driven by the main shaft during the period when the main shaft 12 rotates with the moving contact from the opening position to the closing position, thereby triggering the delay assembly; a bracket 33, which is pivotally arranged in the housing of the pre-charge switch module at a first pivot point, carrying the pre-charge moving contact, and the bracket is operably connected to the delay assembly, so that within a predetermined time after the delay assembly is triggered, the delay assembly drives the bracket to pivot, so that the pre-charge moving contact rotates from the pre-charge closed position to the pre-charge disconnected position. In other words, when the delay assembly is triggered, the bracket is not driven to pivot immediately, but is driven to pivot after a predetermined time, thereby making the circuit breaker module reach the closing state first, and then the pre-charge switch module reaches the pre-charge disconnected state.
[0038] like Fig.10As shown, the delay assembly 32 includes a second push rod 321, which is pivotally arranged in the housing of the pre-fill switch module at a first pivot point, and can be pivoted from a first position to a second position along a predetermined direction under the push of the first push rod 31, the first position corresponds to the pre-fill closed position, and the second position corresponds to the pre-fill disconnected position. The third push rod 322 is pivotally arranged in the housing of the pre-fill switch module at a first pivot point, and a first torsion spring 323 is arranged between the second push rod 321 and the third push rod 322. The third push rod 322 is configured to be pivoted from a third position to a fourth position along a predetermined direction under the action of the first torsion spring 323, the third position corresponds to the pre-fill closed position, and the fourth position corresponds to the pre-fill disconnected position, and the second push rod and the bracket are arranged on opposite sides of the third push rod.
[0039] exist Figure 3 In the exploded view shown, two third push rods 322 and two brackets 33 located on opposite sides of the second push rod 321 are shown, so that there are two pre-charged moving contacts, but those skilled in the art will understand that the operation of these two third push rods and the two brackets is the same, so only one of them is described in the following description.
[0040] The delay assembly further includes a blocking member 324, which is pivotally disposed in the housing of the pre-filling switch module at a second pivot point different from the first pivot point, and can pivot along a predetermined direction between a blocking position and a non-blocking position. In the blocking position, the blocking member abuts against the third push rod to prevent the third push rod from rotating. In the non-blocking position, the blocking member is disengaged from the abutment against the third push rod to allow the third push rod to rotate. In the third position of the third push rod, the blocking member is in the blocking position, such as Figure 2 Or as shown in 4.
[0041] like Fig.10 As shown, the third push rod 322 includes a first protrusion 3221 extending toward the second push rod 321 and a second protrusion 3222 extending toward the bracket. The second push rod 321 has a first notch 3211, and the first protrusion 3221 protrudes into the first notch 3211. The bracket 33 has a second notch 331, and the second protrusion 3222 protrudes into the second notch 331.
[0042] In the third position and the fourth position of the third push rod, the downstream end of the first protrusion located downstream in the predetermined direction abuts against the downstream end of the first notch located downstream in the predetermined direction. In other words, the downstream end of the first notch acts as a stop end for the first protrusion and then the third push rod to pivot in the predetermined direction.
[0043] In the third position of the third push rod 322, the upstream end of the second protrusion 3222 located upstream along the predetermined direction abuts against the upstream end of the second notch 331 located upstream along the predetermined direction, and in the fourth position of the third push rod, the downstream end of the second protrusion located downstream along the predetermined direction abuts against the downstream end of the second notch located downstream along the predetermined direction. In other words, in the third position of the third push rod 322, the upstream end of the second protrusion abuts against the upstream end of the second notch, and the downstream end of the second protrusion is spaced apart from the downstream end of the second notch; in the fourth position of the third push rod 322, the upstream end of the second protrusion is spaced apart from the upstream end of the second notch, and the downstream end of the second protrusion abuts against the downstream end of the second notch.
[0044] To this end, a second torsion spring 34 is arranged between the third push rod 322 and the bracket 33. The second torsion spring 34 is configured to provide a bias force for the upstream end of the second protrusion to abut against the upstream end of the second notch in the third position of the third push rod, thereby ensuring that the moving contact of the pre-filling switch contacts the static contact of the pre-filling switch with overtravel; and to provide a bias force for the downstream end of the second protrusion to abut against the downstream end of the second notch in the fourth position of the third push rod.
[0045] The working process of the transmission mechanism of the present application is described below in conjunction with the accompanying drawings.
[0046] Figure 2 and 4 It shows that the circuit breaker module is in the open state, and the pre-charging moving contact of the pre-charging switch module is in the pre-charging closed position.
[0047] Next, when the circuit breaker module is switched from the open state to the closed state, as the main shaft 12 rotates in a predetermined direction (clockwise in the figure), when the main shaft 12 rotates with the moving contact to the closed position, the first push rod is Figure 6 As shown, driven by the protrusion 121 of the main shaft, the second push rod 321 begins to pivot from the first position toward the second position in the clockwise direction, as shown in FIG. Figure 5 As shown by the arrow. At this time, because the blocking member abuts against the third push rod 322, the first torsion spring stores energy when the second push rod pivots. When the second push rod pivots from the first position to the second position, the downstream end of the first protrusion is disengaged from the abutment with the downstream end of the first notch. When the second push rod pivots to the second position and the third push rod pivots to the fourth position, the downstream end of the first protrusion abuts against the downstream end of the first notch again.
[0048] After the second push rod 321 pivots to the first predetermined angle, the second push rod 321 abuts against the blocking member 324 and drives the blocking member 324 to pivot from the blocking position to the non-blocking position. Figure 7As shown. Thus, the third push rod 322 pivots from the third position toward the fourth position along a predetermined direction under the action of the first torsion spring 323. After the third push rod pivots to a second predetermined angle (i.e., the second protrusion of the third push rod rotates so that the downstream end of the second protrusion abuts against the downstream end of the second notch of the bracket 33), the third push rod abuts against the bracket and drives the bracket to rotate with the pre-charge moving contact from the pre-charge closed position to the pre-charge disconnected position, as shown. Figure 8 and 9 shown.
[0049] The delay assembly further includes a return spring 325 connected to the blocking member and configured to provide a restoring force of the blocking member from the non-blocking position to the blocking position.
[0050] The transmission mechanism further includes a pre-filling switch spring 35, one end of which is connected to the third push rod 322, and the other end is connected to the housing of the pre-filling switch module. During the period when the second push rod 322 pivots from the first position toward the second position along a predetermined direction so that the bracket finally pivots with the pre-filling moving contact from the pre-filling closed position to the pre-filling open position, when the bracket with the pre-filling moving contact rotates to the pre-filling switch spring 35 after passing the dead point position, the pre-filling switch spring provides power for the bracket to continue rotating.
[0051] The focus of this application is on how to reliably ensure the timing of pre-charging the moving contact and then opening the moving contact of the circuit breaker module after the moving contact is closed. Therefore, this article only describes the components related to this process and omits the description of components not related to this process.
[0052] Through the switching device of the present application, the function of pre-charging the main closing position is ensured through a mechanical structure, and there is no need to send a separate instruction to open the pre-charging contacts after the BMS obtains feedback on the successful main closing, thereby simplifying the instructions; reducing the possible failure of the main closing position feedback causing the switch function to fail; and more reliably ensuring the timing of the pre-charging contacts opening again after the main contacts are closed.
[0053] Although the present invention has been described in the specification and illustrated in the drawings with reference to various embodiments, those skilled in the art will appreciate that the above embodiments are merely preferred implementations, and certain technical features in the embodiments may not be necessary for solving specific technical problems, so that these technical features may be absent or omitted without affecting the solution of the technical problems or the formation of technical solutions; moreover, the features, elements and / or functions of one embodiment may be appropriately combined, coupled or coordinated with the features, elements and / or functions of one or more other embodiments, unless the combination, coupling or coordination is obviously not feasible.
Claims
1. A switch device, comprising: A circuit breaker module, comprising an operating handle and a breaking unit, wherein the breaking unit comprises a main shaft, a moving contact and a stationary contact, wherein the operating handle is operably connected to the main shaft so that the main shaft can rotate under the rotation drive of the operating handle, and the moving contact is mounted on the main shaft and can rotate between a closed position and an open position with the rotation of the main shaft, wherein the moving contact contacts the stationary contact in the closed position and the moving contact separates from the stationary contact in the open position; The pre-charge switch module can be detachably mounted to the circuit breaker module. The pre-charge switch module has a housing, a pre-charge moving contact and a pre-charge static contact. The pre-charge moving contact can rotate between a pre-charge closed position and a pre-charge disconnected position. In the pre-charge closed position, the pre-charge moving contact contacts the pre-charge static contact. In the pre-charge disconnected position, the pre-charge moving contact is separated from the pre-charge static contact. Characterized in that the switch device also includes: A transmission mechanism is operably arranged between the circuit breaker module and the pre-charge switch module, and is configured to be driven by the main shaft during the period when the main shaft rotates with the moving contact from the open position to the closed position, so that after the moving contact rotates from the open position to the closed position, the pre-charge moving contact rotates from the pre-charge closed position to the pre-charge open position.
2. The switchgear according to claim 1, characterized in that The transmission mechanism comprises: a first push rod pivotally disposed on a housing of the circuit breaker module; A delay assembly is pivotably disposed in a housing of the pre-charge switch module, and a first push rod is operably connected between a main shaft of the circuit breaker module and the delay assembly, and is configured to be driven by the main shaft during the period when the main shaft rotates with the moving contact from the open position to the closed position, thereby triggering the delay assembly; A bracket is pivotally arranged at a first pivot point in the housing of the pre-charge switch module, carrying the pre-charge moving contact. The bracket is operably connected to the delay component so that within a predetermined time after the delay component is triggered, the delay component drives the bracket to pivot to rotate the pre-charge moving contact from the pre-charge closed position to the pre-charge open position.
3. The switchgear according to claim 2, characterized in that The delay component comprises: A second push rod is pivotally disposed at a first pivot point in the housing of the pre-fill switch module, and can be pivoted from a first position to a second position along a predetermined direction under the push of the first push rod, wherein the first position corresponds to a pre-fill closed position, and the second position corresponds to a pre-fill disconnected position; A third push rod is pivotally disposed at a first pivot point in a housing of the pre-fill switch module, a first torsion spring is disposed between the second push rod and the third push rod, the third push rod is configured to be able to pivot from a third position to a fourth position along a predetermined direction under the action of the first torsion spring, the third position corresponds to a pre-fill closed position, the fourth position corresponds to a pre-fill disconnected position, the second push rod and the bracket are disposed on opposite sides of the third push rod; The blocking member is pivotally arranged in the housing of the pre-filling switch module at a second pivot point different from the first pivot point, and can be pivoted between a blocking position and a non-blocking position in a predetermined direction. In the blocking position, the blocking member abuts against the third push rod to prevent the third push rod from rotating. In the non-blocking position, the blocking member is disengaged from the abutment against the third push rod to allow the third push rod to rotate. When the main shaft rotates to the closing position with the moving contact, the first push rod is driven by the main shaft, so that the second push rod pivots from the first position to the second position. After the second push rod pivots a first predetermined angle, the second push rod abuts against the blocking member and drives the blocking member to pivot from the blocking position to the non-blocking position. As a result, the third push rod pivots from the third position to the fourth position along a predetermined direction under the action of the first torsion spring. After the third push rod pivots a second predetermined angle, the third push rod abuts against the bracket and drives the bracket to rotate with the pre-charged moving contact from the pre-charged closed position to the pre-charged disconnected position.
4. The switchgear according to claim 3, characterized in that The third push rod has a first protrusion extending toward the second push rod, the second push rod has a first notch, the first protrusion protrudes into the first notch, and in the third position and the fourth position of the third push rod, the downstream end of the first protrusion located downstream in the predetermined direction abuts against the downstream end of the first notch located downstream in the predetermined direction, Among them, when the main shaft rotates to the closing position with the moving contact, the first push rod is driven by the main shaft, so that the second push rod pivots from the first position to the second position, so that the downstream end of the first protrusion disengages from the abutment with the downstream end of the first notch. When the second push rod pivots to the second position and the third push rod pivots to the fourth position, the downstream end of the first protrusion abuts against the downstream end of the first notch.
5. The switchgear according to claim 4, characterized in that The third push rod has a second protrusion extending toward the bracket, the bracket has a second notch, and the second protrusion protrudes into the second notch, so that in a third position of the third push rod, an upstream end of the second protrusion located upstream in a predetermined direction abuts against an upstream end of the second notch located upstream in the predetermined direction, and in a fourth position of the third push rod, a downstream end of the second protrusion located downstream in the predetermined direction abuts against a downstream end of the second notch located downstream in the predetermined direction. Among them, when the third push rod pivots at a predetermined angle in a predetermined direction, the upstream end of the second protrusion of the third push rod disengages from the abutment with the upstream end of the second notch, and then the downstream end of the second protrusion abuts against the downstream end of the second notch, thereby pushing the bracket to rotate with the pre-charge moving contact from the pre-charge closed position to the pre-charge disconnected position.
6. The switchgear according to claim 5, characterized in that The delay assembly also includes a second torsion spring arranged between the third push rod and the bracket, and the second torsion spring is configured to provide a biasing force for the upstream end of the second protrusion to abut against the upstream end of the second notch in the third position of the third push rod; and to provide a biasing force for the downstream end of the second protrusion to abut against the downstream end of the second notch in the fourth position of the third push rod.
7. The switch device according to claim 3, characterized in that The delay assembly further includes a return spring connected to the blocking member and configured to provide a restoring force of the blocking member from the non-blocking position to the blocking position.
8. The switch device according to claim 3, characterized in that The transmission mechanism also includes a pre-charge switch spring, one end of which is connected to the third push rod and the other end is connected to the housing of the pre-charge switch module. When the second push rod pivots from the first position toward the second position along a predetermined direction so that the final bracket carries the pre-charge moving contact from the pre-charge closed position to the pre-charge open position, when the bracket with the pre-charge moving contact rotates to the pre-charge switch spring and passes the dead point position, the pre-charge switch spring provides power for the bracket to continue rotating.