An operating mechanism and a rotary disconnect switch

Abstract

This application provides an operating mechanism and a rotary disconnecting switch, belonging to the field of low-voltage electrical technology. It includes a housing, within which are a centrally located mechanism and a molded-case four-bar linkage. The molded-case four-bar linkage is connected to a rotating shaft for driving the contacts of the switching device. The centrally located mechanism is connected to a handle. Operating the handle causes the centrally located mechanism to drive the molded-case four-bar linkage, thereby driving the contacts to open and close via the rotating shaft. The linkage between the molded-case four-bar linkage and the centrally located mechanism ensures the stability of the molded-case four-bar linkage in terms of breaking and tripping, while retaining the characteristic of traditional disconnecting switches where the operating center coincides with the contact rotation center. The molded-case four-bar linkage and the energy storage mechanism are located on one side of the centrally located mechanism, and the remote tripping mechanism is located on one side of the molded-case four-bar linkage. This overall layout effectively reduces the switch's size.

Description

[0001] This application is a divisional application. The original application has the application number 202210081923.9 and the original application date is January 24, 2022. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of low-voltage electrical technology, and more specifically, to an operating mechanism and a rotary disconnect switch. Background Technology

[0003] As a switching device, a disconnecting switch is mainly used for "isolating power supply, switching operations, and connecting and disconnecting small current circuits," and has no arc-extinguishing function. When in the open position, the disconnecting switch has an insulation distance between the contacts that meets the specified requirements and a clear disconnection mark; when in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) for a specified time.

[0004] Traditional disconnect switches have the operating mechanism and contact system arranged coaxially. They typically use a torsion spring to rotate, compress, and release to drive opening and closing. This method requires a large torsion spring to meet the switch's excellent breaking performance. When remote opening is required, the additional unlocking mechanism increases the size of the switch body, making the whole unit more cumbersome. Furthermore, the torsion springs vary considerably in precision, resulting in poor overall stability and consistency. Summary of the Invention

[0005] The purpose of this application is to provide an operating mechanism and a rotary disconnect switch. This mechanism introduces a molded four-bar linkage mechanism with relatively stable breaking and tripping performance, and maintains consistency with the appearance and operation of traditional disconnect switches through the conversion of the central mechanism.

[0006] The embodiments of this application are implemented as follows: One aspect of this application provides an operating mechanism, which includes a housing. The housing contains a centrally located mechanism and a plastic-shell four-bar linkage. The plastic-shell four-bar linkage is connected to a rotating shaft for driving the contacts of a switching device. The centrally located mechanism is connected to a handle. By operating the handle, the centrally located mechanism drives the plastic-shell four-bar linkage to move, thereby driving the contacts to open and close via the rotating shaft.

[0007] Optionally, an energy storage mechanism is also connected to one side of the central mechanism. The energy storage mechanism includes a support plate that is linked to the rotating shaft. One end of the support plate is mounted on the housing via a rotating shaft. A torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring are respectively connected to the housing and the support plate.

[0008] Optionally, a remote release mechanism is also connected to one side of the plastic-shell four-bar linkage, and the remote release mechanism is connected to the plastic-shell four-bar linkage via a primary unlocking rod.

[0009] Optionally, the remote tripping mechanism is a flux reset structure, or the remote tripping mechanism is a shunt reset structure.

[0010] Optionally, the center of the handle coincides with the center of the rotating shaft.

[0011] Optionally, a side plate is provided inside the housing, and the central mechanism includes a handle torsion member rotatably connected to the side plate, and a rotating member coaxially arranged with the handle torsion member. The rotating member is rotatably connected to a first connecting rod and a support frame in sequence. The support frame is connected to the plastic shell four-bar linkage mechanism, and the rotating member, the first connecting rod, the support frame and the side plate form a four-bar linkage mechanism.

[0012] Optionally, the handle torsion member and the rotating member are connected by a protrusion and a slot, respectively.

[0013] Optionally, the first link and the support frame are connected by a second link.

[0014] Optionally, the plastic shell four-bar linkage includes a third link rotatably connected to the rotating shaft. The third link is also sequentially connected to a connecting shaft, a fourth link, and a fastener. The fastener is rotatably connected to the side plate. An elastic element is connected between the connecting shaft and the support frame. The rotating shaft, the fastener, the third link, and the fourth link form a four-bar linkage.

[0015] Optionally, the support frame and the connecting shaft are connected by an elastic element.

[0016] This application also provides a rotary disconnect switch, including the above-described operating mechanism and an on / off device connected to the rotating shaft of the operating mechanism.

[0017] The beneficial effects of the embodiments of this application include: The operating mechanism and rotary disconnect switch provided in this application embodiment include a central mechanism, a molded-shell four-bar linkage, an energy storage mechanism, and a remote tripping mechanism within the housing of the operating mechanism. The central mechanism connects to a handle, and the molded-shell four-bar linkage connects to a rotating shaft. The rotating shaft connects to the contacts of the switching device, driving the contacts to actuate and complete the opening and closing of the circuit. The operating handle actuates the central mechanism, which in turn actuates the molded-shell four-bar linkage and the rotating shaft, thereby completing the opening and closing of the contacts. Through the linkage of the molded-shell four-bar linkage and the central mechanism, the stability of the molded-shell four-bar linkage in terms of breaking and tripping is ensured, while retaining the characteristic of the traditional disconnect switch where the operating center coincides with the contact rotation center. The molded-shell four-bar linkage and the energy storage mechanism are located on one side of the central mechanism, and the remote tripping mechanism is located on one side of the molded-shell four-bar linkage. This overall layout effectively reduces the size of the switch. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the schematic diagrams of the operating mechanism structure provided in the embodiments of this application; Figure 2 This is the second schematic diagram of the operating mechanism structure provided in the embodiments of this application; Figure 3 This is one of the schematic diagrams of the operating mechanism provided in the embodiments of this application; Figure 4 This is the second schematic diagram of the operating mechanism structure provided in the embodiments of this application; Figure 5 This is the third schematic diagram of the operating mechanism structure provided in the embodiments of this application; Figure 6 This is the fourth schematic diagram of the operating mechanism structure provided in the embodiments of this application; Figure 7 This is a schematic diagram of the four-bar linkage structure in the closed state of the operating mechanism provided in the embodiments of this application; Figure 8 This is a schematic diagram of the four-bar linkage structure in the open state of the operating mechanism provided in the embodiments of this application; Figure 9 The third schematic diagram of the operating mechanism structure provided in the embodiments of this application; Figure 10 This is a schematic diagram of the rotary disconnector structure provided in an embodiment of this application.

[0020] Icons: 100-Operating mechanism; 101-Housing; 11-Central mechanism; 110-Torsion component; 111-First link; 112-Side plate; 113-Second link; 114-Support frame; 115-Rotating component; 116-Flanged structure; 117-Positioning shaft; 12-Plastic shell four-bar linkage; 121-Fourth link; 122-Carrier bracket; 1221-Shaft; 123-Connecting shaft; 12 4-Third link; 13-Energy storage mechanism; 131-Support plate; 132-Torsion spring; 133-Rotating shaft; 134-Compression spring; 14-Remote tripping mechanism; 141-Secondary unlocking rod; 142-Push rod; 15-First-level unlocking rod; 151-Torsion spring; 152-Lock plate; 16-Rotating shaft; 16a-Connecting block; 17-Elastic element; 200-Rotary disconnecting switch; 210-On / off device. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] Specifically, please refer to Figure 1 This application provides an operating mechanism 100, including a housing 101. The housing 101 is provided with a centrally located mechanism 11 and a plastic-shell four-bar linkage 12. The plastic-shell four-bar linkage 12 is connected to a rotating shaft 16 for driving the contacts of the switching device 210. The centrally located mechanism 11 is used to connect a handle. By operating the handle, the centrally located mechanism 11 drives the plastic-shell four-bar linkage 12 to move, so as to drive the contacts to open and close through the rotating shaft 16.

[0024] The housing 101 houses a centrally located mechanism 11, a plastic-shell four-bar linkage 12, an energy storage mechanism 13, and a remote tripping mechanism 14. The housing 101 also has a top cover (not shown) to enclose each mechanism within the housing 101, exposing only the portion connected to the handle. For example, such as... Figure 2 As shown, in one embodiment of this application, the central mechanism 11 and the plastic shell four-bar linkage 12 are arranged along a first direction, which is the width direction of the housing 101. An energy storage mechanism 13 is also connected to one side of the central mechanism 11, and a remote tripping mechanism 14 is also connected to the side of the plastic shell four-bar linkage 12 away from the energy storage mechanism 13. The energy storage mechanism 13 and the remote tripping mechanism 14 are both located on one side of the central mechanism 11 and the plastic shell four-bar linkage 12, respectively, along a direction perpendicular to the first direction, making the overall layout compact and effectively reducing the volume of the operating mechanism 100.

[0025] It should be understood that the above layout is only one possible implementation of the embodiments of this application, and is not the only limitation or the only supported solution for the layout of the central mechanism 11, the plastic shell four-bar linkage 12, the energy storage mechanism 13 and the remote tripping mechanism 14. The specific layout can be set according to actual needs. For example, the layout can also adopt a surrounding arrangement, a horizontal arrangement or a vertical arrangement, as long as the transmission can be realized.

[0026] The central mechanism 11 connects to the handle, and the plastic-shell four-bar linkage 12 connects to the rotating shaft 16. The rotating shaft 16 is connected to the contacts. When the handle is operated, the central mechanism 11 activates the plastic-shell four-bar linkage 12, causing the rotating shaft 16 to rotate and drive the contacts to open and close. The operating mechanism 100 provided in this embodiment, through the linkage of the plastic-shell four-bar linkage 12 and the central mechanism 11, ensures the stability of the plastic-shell four-bar linkage 12 in terms of breaking and tripping, while retaining the characteristic that the operating center of the traditional disconnector coincides with the rotation center of the contacts. When the handle is operated, the central mechanism 11 only needs to rotate a small angle to cause the rotating shaft 16 to rotate a large angle through the plastic-shell four-bar linkage 12, simplifying the transmission structure and reducing the overall size.

[0027] Furthermore, in one possible implementation of this application, the center of the handle and the center of the rotating shaft 16 coincide, thus making full use of the available operating space and improving the overall structural compactness. Of course, the center of the handle and the center of the rotating shaft 16 can also be set according to specific needs, as long as the required transmission can be guaranteed, and are not limited to the above-mentioned coincidence.

[0028] The remote tripping mechanism 14 is used to remotely trip the circuit to protect its safety when a circuit fault occurs. When the remote tripping mechanism 14 is activated, it causes the molded four-bar linkage 12 to activate, which drives the contacts to trip via the rotating shaft 16. The energy storage mechanism 13 is used to store energy when the intermediate mechanism 11 is activated, so as to supplement the excess closing force to the opening force, thus playing a role in energy recovery. The remote tripping mechanism 14 and the energy storage mechanism 13 are described in detail later.

[0029] In summary, the operating mechanism 100 provided in this embodiment includes a central mechanism 11, a plastic-shell four-bar linkage 12, an energy storage mechanism 13, and a remote tripping mechanism 14 within its housing 101. The central mechanism 11 connects to a handle, and the plastic-shell four-bar linkage 12 connects to a rotating shaft 16. The rotating shaft 16 connects to the contacts of the switching device, driving the contacts to actuate and complete the opening and closing of the circuit. The operating handle actuates the central mechanism 11, which in turn drives the plastic-shell four-bar linkage 12 and the rotating shaft 16 to actuate, thereby completing the opening and closing of the contacts. Through the linkage of the plastic-shell four-bar linkage 12 and the central mechanism 11, the stability of the plastic-shell four-bar linkage 12 in terms of breaking and tripping is ensured, while retaining the characteristic that the operating center of a traditional disconnector coincides with the rotation center of the contacts.

[0030] In addition, the operation of the central mechanism 11 drives the energy storage mechanism 13 to complete energy conversion, supplementing the excess closing force of the system to the opening force, thus completing energy recovery; the operation of the molded case four-bar linkage 12 is driven by the remote tripping mechanism 14 to complete the opening in case of circuit failure, ensuring circuit safety. The energy storage mechanism 13 is located on one side of the central mechanism 11, and the remote tripping mechanism 14 is located on one side of the molded case four-bar linkage. Through the overall layout, the size of the switch is also effectively reduced.

[0031] Specifically, such as Figure 3 As shown, a side plate 112 is provided inside the housing 101. There are two side plates 112, which are parallel and connected by a positioning shaft 117. For the central mechanism 11, the central mechanism 11 includes a torsion member 110 rotatably connected to the side plate 112, and a rotating member 115 coaxially arranged with the torsion member 110. The rotating member 115 is rotatably connected to a first connecting rod 111 and a support frame 114 in sequence. The support frame 114 is connected to the plastic shell type four-bar linkage 12. The first connecting rod 111 and the support frame 114 are connected by a second connecting rod 113. The rotating member 115, the first connecting rod 111, the support frame 114 and the side plate 112 form a four-bar linkage.

[0032] A rectangular groove is provided on the top surface of the torsion member 110. The rectangular groove is used to match the handle. After the handle is inserted into the rectangular groove, rotating the handle can rotate the torsion member 110. The rotating member 115 is coaxially arranged with the torsion member 110. When the torsion member 110 rotates, it drives the rotating member 115 to rotate. For example, the torsion member 110 and the rotating member 115 are connected by a protrusion and a slot, respectively. In other words, a protrusion can be provided at the bottom of the torsion member 110, and a slot can be provided at the top of the rotating member 115. The protrusion and the slot cooperate to connect the torsion member 110 and the rotating member 115. Alternatively, a slot can be provided at the bottom of the torsion member 110, and a protrusion can be provided at the top of the rotating member 115, which can also connect the torsion member 110 and the rotating member 115.

[0033] When the rotating component 115 rotates, it sequentially drives the first connecting rod 111, the second connecting rod 113, and the support frame 114 to rotate. The support frame 114 is connected to the rotating shaft 16 via a plastic-shell four-bar linkage 12. The rotating component 115, the first connecting rod 111, the support frame 114, and the side plate 112 form a four-bar linkage. Generally, to ensure sufficient opening distance during circuit breaking, the rotating shaft 16 needs to drive the contacts to rotate 90°. Since the rotating shaft 16 and the support frame 114 are connected via the plastic-shell four-bar linkage 12, when the support frame 114 rotates relative to the side plate 112, it can drive the plastic-shell four-bar linkage 12 to have a large displacement, thus achieving the required rotation angle of the rotating shaft 16. Furthermore, since the rotating component 115, the first connecting rod 111, the support frame 114, and the side plate 112 form a four-bar linkage, the four-bar linkage can be driven to move when the rotating component 115 is rotated by the torsion component 110. In this way, only a small angle needs to be rotated by the support frame 114, generally around 37°, so there is no need to set up a large space for the support frame 114 to move, thus achieving the purpose of reducing the space and volume occupied by the switch.

[0034] Figure 7 The diagram shows the state of the four-bar linkage formed by the rotating component 115, the first connecting rod 111, the support frame 114, and the side plate 112 in the closed state. Figure 8 The diagram shows a four-bar linkage formed by the rotating component 115, the first connecting rod 111, the support frame 114, and the side plate 112 in the open state. As can be seen from the diagram, when the rotating component 115 drives the support frame 114 to rotate, the support frame 114 can achieve the required transmission by having a small deflection angle relative to the side plate 112.

[0035] After the four-bar linkage formed by the rotating component 115, the first connecting rod 111, the support frame 114, and the side plate 112 is activated, it can drive the plastic-shell type four-bar linkage 12 to operate. For details, please refer to... Figure 5 The plastic shell type four-bar linkage 12 includes a third link 124 rotatably connected to the rotating shaft 16. The third link 124 is also connected in sequence to the connecting shaft 123, the fourth link 121, and the fastener 122. The fastener 122 is rotatably connected to the side plate 112. An elastic element 17 is connected between the connecting shaft 123 and the support frame 114. The rotating shaft 16, the fastener 122, the third link 124, and the fourth link 121 form a four-bar linkage.

[0036] like Figure 4As shown, the support frame 114 includes two parallel flat plates and a vertical plate connecting one side of the two flat plates to form a "U"-shaped structure. Similarly, there are two fourth connecting rods 121, which are connected by the vertical plate to form a "U"-shaped structure with the support frame 114. The rotating shaft 16 is rotatably mounted on the side plate 112, and the side plate 112 is also rotatably connected to the fastener 122 via the shaft 1221. The fastener 122 also forms a "U"-shaped structure. The support frame 114, the "U"-shaped structure formed by the two fourth connecting rods 121, and the fastener 122 are sequentially enclosed. In other words, the fastener 122 is located inside the two fourth connecting rods 121, and the two fourth connecting rods 121 are located inside the support frame 114. The "U"-shaped openings of the support frame 114, the two fourth connecting rods 121, and the fastener 122 face different directions, and the support frame 114 and the side plate 112 are located on the same plane.

[0037] A connecting block 16a is provided on the outer periphery of the rotating shaft 16 to connect the third connecting rod 124. There are two third connecting rods 124, which are connected in parallel to the connecting blocks 16a on the outer periphery of the rotating shaft 16. The other ends of the two third connecting rods 124 are connected to the connecting shaft 123. The end of the fourth connecting rod 121 is connected to the connecting shaft 123, and the other open end is connected to the fastener 122. Figure 4 As shown, an elastic element 17 is connected between the connecting shaft 123 and the support frame 114. The elastic element 17 is a spring, and the two ends of the spring are respectively connected to the support frame 114 and the connecting shaft 123. In order to realize the transmission, there are two springs to provide the elastic force required for the opening and closing operation of the plastic shell four-bar linkage 12. The aforementioned rotating shaft 16, the mounting bracket 122, the third link 124 and the fourth link 121 form another four-bar linkage. When the support frame 114 rotates, the elastic element 17 drives the connecting shaft 123 to rotate, so that the four-bar linkage formed by the rotating shaft 16, the mounting bracket 122, the third link 124 and the fourth link 121 can move, thereby driving the rotating shaft 16 to move and realize the opening and closing of the circuit.

[0038] Figure 7 The diagram shows the state of the four-bar linkage formed by the rotating shaft 16, the mounting bracket 122, the third link 124, and the fourth link 121 in the closed state. Figure 8 The diagram shows the state of the four-bar linkage formed by the rotating shaft 16, the mounting bracket 122, the third link 124, and the fourth link 121 in the open state. As can be seen from the diagram, when the rotating component 115 drives the support frame 114 to rotate, the support frame 114 rotates relative to the side plate 112. Due to the connection of the elastic component 17, the position of the connecting shaft 123 is changed between the support frame 114 and the connecting shaft 123, thereby realizing the required open operation.

[0039] It can be seen that the molded shell four-bar linkage 12 and the central mechanism 11 of this application each form a four-bar linkage, and the opening and closing of the circuit is achieved through the linkage of the two four-bar linkages. By linking the molded shell four-bar linkage 12 and the central mechanism 11, the operation handle driving the opening and closing of the circuit is changed from the original pull rod outer circumferential push-pull drive to the rotation drive of the rotating shaft 16. The central mechanism 11 only needs to rotate a small angle, which can make the rotating shaft 16 rotate a large angle through the molded shell four-bar linkage 12, simplifying the transmission structure and reducing the size of the operating mechanism 100.

[0040] Please refer to Figure 6 As shown, the operating mechanism 100 provided in this application embodiment also includes an energy storage mechanism 13. The energy storage mechanism 13 includes a support plate 131 that is linked with the rotating shaft 16. One end of the support plate 131 is mounted on the housing 101 via a rotating shaft 133. A torsion spring 132 is sleeved on the rotating shaft 133. The two ends of the torsion spring 132 are respectively connected to the housing 101 and the support plate 131.

[0041] The abutment plate 131 and the connecting block 16a of the rotating shaft 16 abut together. When closing, the rotating shaft 16 rotates, driving the connecting block 16a to push the abutment plate 131 to move. The movement of the abutment plate 131 causes the torsion spring 132 to twist and store energy. When opening, the torsion spring 132 releases energy to do work, driving the abutment plate 131 to reverse. In this way, the excess closing force during closing is stored in the torsion spring 132, and the energy stored in the torsion spring 132 is released during opening to compensate for the opening force required for opening. This changes the situation of excessive closing force and insufficient opening force, and maintains the stability of the system's opening and closing.

[0042] In addition, it can also be achieved through Figure 9 The compression spring 134 shown stores energy. One end of the compression spring 134 abuts against the housing 101, and the other end abuts against the support plate 131. The energy stored in the compression spring 134 is used to compensate for the opening force required for the circuit breaker to open. Its principle is the same as that of the torsion spring 132 mentioned above, and will not be described again here.

[0043] The remote tripping mechanism 14 is used to drive the contacts to open the circuit protection circuit via the plastic-cased four-bar linkage 12 when a circuit fault occurs. The remote tripping mechanism 14 is connected to the carrier frame 122 of the plastic-cased four-bar linkage 12 via a first-stage unlocking rod 15. The first-stage unlocking rod 15 is also connected to a locking plate 152, on which a torsion spring 151 is sleeved. Both ends of the torsion spring 151 are connected to the housing 101 and the locking plate 152, and the locking plate 152 and the carrier frame 122 are linked. The remote tripping mechanism 14 drives the first-stage unlocking rod 15 to move, and the first-stage unlocking rod 15 drives the plastic-cased four-bar linkage 12 to move via the locking plate 152, thus completing the circuit opening.

[0044] Specifically, please refer to Figure 2The remote tripping mechanism 14 can be a magnetic flux reset structure. After the magnetic flux reset structure opens the circuit, it needs to be reset by external force, which in turn resets the system and closes the circuit. When the magnetic flux is energized, the magnetic flux is pushed out, which pushes the secondary unlocking rod 141 to move. The secondary unlocking rod 141 drives the primary unlocking rod 15 to move, so as to complete the opening through the plastic shell four-bar linkage mechanism 12. When a reset is required, the handle is rotated in the opposite direction. The flange structure 116 linked to the handle strikes the secondary unlocking rod 141 to move in the opposite direction. The secondary unlocking rod 141 presses the magnetic flux, and the magnetic flux is reset.

[0045] The remote tripping mechanism 14 can also provide Figure 9 The shunt reset structure shown can automatically reset without external force. When the shunt reset structure is energized, the magnetic flux is retracted, which pushes the first-stage unlocking rod 15 through the push rod 142 to complete the tripping through the plastic-shell four-bar linkage 12. Because the remote tripping mechanism 14 is equipped with a reset spring, the reset spring deforms and accumulates energy when the magnetic flux is retracted. When the magnetic flux is de-energized during reset, the reset spring releases energy and the magnetic flux is pushed out, pushing the push rod 142 to move in the opposite direction to complete the automatic reset and closing.

[0046] On the other hand, please refer to Figure 10 As shown in the illustration, this application also provides a rotary disconnect switch 200, including the operating mechanism 100 described in the foregoing embodiments, and an on / off device 210 connected to the rotating shaft 16 of the operating mechanism 100. This rotary disconnect switch 200 has the same structure and beneficial effects as the operating mechanism 100 described in the foregoing embodiments. The structure and beneficial effects of the operating mechanism 100 have been described in detail in the foregoing embodiments and will not be repeated here.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An operating mechanism, characterized in that, The device includes a housing, within which are a centrally located mechanism, an elastic element, and a plastic-shell four-bar linkage. The plastic-shell four-bar linkage is used to drive the moving contact of the on / off device to rotate, and the centrally located mechanism is used to connect a handle. The housing has a side plate inside. The central mechanism includes a torsion member rotatably connected to the side plate, the torsion member being connected to the handle, and a rotating member coaxially arranged with the torsion member. The rotating member is rotatably connected to a first connecting rod and a support frame in sequence. The support frame is connected to the plastic-shell four-bar linkage through the elastic member. The rotating member, the first connecting rod, the support frame, and the side plate form a four-bar linkage. By operating the handle, the central mechanism drives the plastic-shell four-bar linkage to move, thereby driving the moving contact to open and close the circuit breaker.

2. The operating mechanism according to claim 1, characterized in that, The plastic shell four-bar linkage drives the moving contact to rotate via a rotating shaft. An energy storage mechanism is also connected to one side of the central mechanism. The energy storage mechanism includes a support plate that is linked to the rotating shaft. One end of the support plate is mounted on the shell via a rotating shaft. A torsion spring is sleeved on the rotating shaft. The two ends of the torsion spring are respectively connected to the shell and the support plate.

3. The operating mechanism according to claim 2, characterized in that, The center of the handle coincides with the center of the rotating shaft.

4. The operating mechanism according to any one of claims 1-3, characterized in that, One side of the plastic-shell four-bar linkage is also connected to a remote tripping mechanism. The remote tripping mechanism is used to activate when a circuit fault occurs, so as to activate the plastic-shell four-bar linkage and drive the moving contact to open the circuit.

5. The operating mechanism according to claim 4, characterized in that, The remote release mechanism is connected to the plastic-shell four-bar linkage mechanism via a primary unlocking rod.

6. The operating mechanism according to claim 4 or 5, characterized in that, The remote tripping mechanism is a flux reset structure, or the remote tripping mechanism is a shunt reset structure.

7. The operating mechanism according to any one of claims 1-6, characterized in that, The torsion member and the rotation member are connected by a protrusion and a slot, respectively.

8. The operating mechanism according to any one of claims 1-7, characterized in that, The first link and the support frame are connected by a second link.

9. The operating mechanism according to any one of claims 1-8, characterized in that, The plastic shell type four-bar linkage includes a third link rotatably connected to the rotating shaft. The third link is also sequentially connected to a connecting shaft, a fourth link, and a fastener frame. The fastener frame is rotatably connected to the side plate. An elastic element is connected between the connecting shaft and the support frame. The rotating shaft, the fastener frame, the third link, and the fourth link form a four-bar linkage.

10. A rotary disconnect switch, characterized in that, It includes the operating mechanism as described in any one of claims 1-9, and the on / off device connected to the rotating shaft of the operating mechanism.

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