Operating mechanism of isolating switch

Abstract

The utility model belongs to the field of disconnecting switches, and particularly relates to an operating mechanism of a disconnecting switch, which comprises a shell, a connecting rod mechanism and a handle shaft assembly, the connecting rod mechanism comprises a mechanism frame, a lever, a jump pin, an upper connecting rod, a lower connecting rod and a driving piece, and a connecting rod shaft is connected between the upper connecting rod and the lower connecting rod. The lever is rotationally arranged on the mechanism frame and is in linkage fit with the handle shaft assembly, a main spring is connected between the lever and the connecting rod shaft, the jump pin is rotationally arranged on the mechanism frame, an upper connecting shaft is connected between the upper connecting rod and the jump pin, a lower connecting shaft is connected between the lower connecting rod and the driving piece, and a lock catch in hasp fit with the jump pin is rotationally arranged on the mechanism frame; the handle shaft assembly drives the switch body to be switched on and switched off through the connecting rod mechanism, the requirement for the rotating operation mode of the disconnecting switch can be met, when a line breaks down, the lock catch and the jump pin can be rapidly tripped, rapid tripping and switching off of the operation mechanism are achieved, and therefore equipment and the line are protected against damage.

Description

Technical Field

[0001] This utility model belongs to the field of disconnecting switch technology, and specifically relates to an operating mechanism for a disconnecting switch. Background Technology

[0002] A disconnect switch is a device that isolates a de-energized section from a energized section, creating a clear disconnect point to isolate faulty equipment or facilitate maintenance during power outages. During electrical equipment maintenance, isolating the equipment from the power source creates a clear disconnect point, preventing safety accidents. With the rapid development of the photovoltaic industry, the demand for intelligent photovoltaic inverters is increasing. Photovoltaic disconnect switches are mainly used to control the current flow between photovoltaic panels and inverters, playing a crucial role in the safe operation of the system. In the event of a photovoltaic system fault, the photovoltaic disconnect switch can quickly cut off power, protecting the inverter and panels from current damage.

[0003] Existing conventional disconnect switches are mainly used for isolating power supplies, connecting and disconnecting low-current circuits, and serving as protective switching devices for lines. The operating mechanism of conventional disconnect switches lacks rapid power-off and protection functions (line fault tripping function), thus limiting their application in photovoltaic power generation systems. Therefore, designing an operating mechanism for disconnect switches that meets the requirements of photovoltaic power generation systems is essential. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an operating mechanism for an isolating switch that can meet the requirements of photovoltaic power generation systems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An operating mechanism for a disconnecting switch includes a housing, a linkage mechanism, and a handle shaft assembly. The handle shaft assembly is configured to transmit the rotational force of the operating handle to the linkage mechanism, so that the linkage mechanism drives the switch body to open or close. The linkage mechanism includes a mechanism frame, a lever, a trip latch, an upper linkage, a lower linkage, and a driving component. A linkage shaft connects the upper linkage and the lower linkage. The lever is rotatably mounted on the mechanism frame and is linked with the handle shaft assembly. A main spring connects the lever and the linkage shaft. The trip latch is rotatably mounted on the mechanism frame. An upper connecting shaft connects the upper linkage and the trip latch. A lower connecting shaft connects the lower linkage and the driving component. A latch that engages with the trip latch is rotatably mounted on the mechanism frame. The driving component is rotatably mounted on the mechanism frame and is configured to transmit the driving force of the lower linkage to the main shaft of the switch body, so that the switch body performs the opening or closing action.

[0006] In some embodiments, the handle shaft assembly includes a handle shaft and a slider slidably disposed within the housing. The slider is linked with a lever and causes the lever to rotate on the mechanism frame. One end of the handle shaft has a rotating shaft portion extending outside the housing and connected to the operating handle. The other end of the handle shaft is provided with a drive gear. The slider has a rack portion that meshes with the drive gear.

[0007] In some embodiments, the slider has two actuation grooves on both sides, and the lever has two levers on both sides that cooperate with the two actuation grooves. The two levers are inserted into the two actuation grooves and form a linkage between the two levers and the slider.

[0008] In some embodiments, two guide posts are symmetrically arranged inside the housing, and the slider is provided with two guide holes that cooperate with the two guide posts. The two guide posts are respectively inserted into the two guide holes, and form a sliding connection between the slider and the two guide posts.

[0009] In some embodiments, the housing includes a bottom shell and a cover. The bottom shell has positioning grooves at the two ends of the two guide pillars. The two ends of the two guide pillars are respectively placed in the positioning grooves. The cover is fitted onto the bottom shell and connected by fasteners, and the cover presses the two ends of the two guide pillars into the positioning grooves.

[0010] In some embodiments, one end of the jump buckle has a locking piece that cooperates with the latch, the latch is provided with a locking groove that cooperates with the locking piece, the locking piece is fastened in the locking groove, and a limiting cooperation is formed between the locking piece and the locking groove, and a reset spring is provided between the other end of the jump buckle and the mechanism frame.

[0011] In some embodiments, a locking plate is rotatably provided on the mechanism frame corresponding to the locking side, and a torsion spring is provided on the locking plate to cooperate with the locking plate. The locking plate and the torsion spring cooperate to keep the locking plate and the snap fastener in the locked state.

[0012] In some embodiments, the latch is provided with a positioning rod, the torsion spring is fitted on the positioning rod, the first torsion arm of the torsion spring abuts against the latch, and the second torsion arm of the torsion spring abuts against the latch pressure plate.

[0013] In some embodiments, the lever is provided with an actuating piece for driving the snap-lock action. The actuating piece transmits the driving force of the lever to the snap-lock, causing the snap-lock to engage with the locking buckle.

[0014] In some embodiments, the center of the jump buckle is provided with an arc-shaped protrusion that cooperates with the actuating piece.

[0015] The beneficial effects of this utility model are as follows: The rotational power of the operating handle is transmitted to the linkage mechanism through the handle shaft assembly, so that the linkage mechanism drives the switch body to open or close, thereby meeting the requirements of the rotational operation mode of the disconnecting switch. Furthermore, the locking and tripping latches of the linkage mechanism engage, allowing for rapid disengagement of the locking and tripping latches in the event of a line fault, thus protecting the equipment and lines from damage. When closing, rotating the operating handle causes the lever to rotate via the handle shaft assembly. The lever, through the main spring, pulls the linkage shaft (the main spring begins to store energy). The linkage shaft drives the upper and lower linkages to rotate. When the main spring passes its dead point (the main spring releases energy), the linkage shaft, through the upper and lower linkages, drives the driving component to move rapidly. The driving component then drives the main shaft of the switch body to move, achieving rapid closing of the switch body, thereby improving the breaking capacity of the operating mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is an exploded view of the disconnecting switch according to an embodiment of the present utility model;

[0018] Figure 2 This is a perspective view of an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 4 This is a perspective view of the linkage mechanism according to an embodiment of the present utility model. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0023] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0025] like Figure 1-4As shown, an operating mechanism for a disconnecting switch includes a housing 10, a linkage mechanism 20, and a handle shaft assembly 30. The handle shaft assembly 30 is configured to transmit the rotational force of the operating handle to the linkage mechanism 20, so that the linkage mechanism 20 drives the switch body 40 to perform opening or closing. The linkage mechanism 20 includes a mechanism frame 21, a lever 22, a trip latch 23, an upper link 24, a lower link 25, and a driving member 26. A linkage shaft 201 connects the upper link 24 and the lower link 25. The lever 22 is rotatably mounted on the mechanism frame 21 and is linked with the handle shaft assembly 30. In this configuration, a main spring 27 connects lever 22 and connecting rod shaft 201. A trip latch 23 is rotatably mounted on the mechanism frame 21. An upper connecting shaft 202 connects upper connecting rod 24 and trip latch 23. A lower connecting shaft 203 connects lower connecting rod 25 and drive member 26. A latch 28, which engages with trip latch 23, is rotatably mounted on the mechanism frame 21. The drive member 26 is configured to transmit the driving force of lower connecting rod 25 to the main shaft of switch body 40, causing switch body 40 to perform opening or closing actions. The drive member is a drive gear. A transmission gear meshes with the drive gear on the main shaft of switch body. The drive gear drives the transmission gear to rotate, and the transmission gear drives the main shaft of switch body to perform opening and closing actions. The rotational force of the operating handle is transmitted to the linkage mechanism via the handle shaft assembly, which drives the switch body to open or close. This meets the requirements of the rotary operation mode of the disconnecting switch. The locking and tripping latches of the linkage mechanism engage quickly, allowing for rapid tripping of the operating mechanism in the event of a line fault, thus protecting the equipment and lines from damage. When closing, rotating the operating handle drives the lever via the handle shaft assembly. The lever, through the main spring, pulls the linkage shaft (the main spring begins to store energy). The linkage shaft drives the upper and lower linkages to rotate. When the main spring passes its dead point (the main spring releases energy), the linkage shaft, through the upper and lower linkages, drives the drive component to move rapidly. The drive component then drives the main shaft of the switch body, achieving rapid closing of the switch body and thus improving the breaking capacity of the operating mechanism.

[0026] like Figure 1-3As shown, the handle shaft assembly 30 includes a handle shaft 31 and a slider 32 slidably disposed within the housing 10. The slider 32 is linked with the lever 22, causing the lever 22 to rotate on the mechanism frame 21. One end of the handle shaft 31 has a rotating shaft portion 311 extending outside the housing 10 and connected to the operating handle. The other end of the handle shaft 31 is provided with a drive gear 33. The slider 32 has a rack portion 321 that meshes with the drive gear 33. The handle shaft assembly adopts a modular structure design, which facilitates the assembly of the handle shaft assembly and the housing. During operation, the user inserts the operating handle into the rotating shaft portion of the handle shaft and rotates the operating handle. The handle shaft moves with the operating handle, causing the drive gear to rotate. The drive gear drives the slider to slide within the housing through the rack portion, thereby improving the working reliability of the handle shaft assembly. The slider 32 has two actuating grooves 322 on both sides, and the lever 22 has two levers 221 on both sides that cooperate with the two actuating grooves 322. The two levers 221 are inserted into the two actuating grooves 322, forming a linkage between the two levers 221 and the slider 32. The slider drives the two levers of the lever through the actuating grooves, which facilitates the assembly of the slider and the lever and ensures more reliable transmission between the slider and the lever.

[0027] like Figure 1 As shown, two guide posts 34 are symmetrically arranged inside the housing 10. The slider 32 has two guide holes 323 that mate with the guide posts 34. The two guide posts 34 are respectively inserted into the two guide holes 323, forming a sliding connection between the slider 32 and the two guide posts 34. The slider is slidably mounted on the guide posts, ensuring reliable movement within the housing and thus improving the operational reliability of the mechanism. The housing 10 includes a bottom shell 101 and a cover 102. Positioning grooves 1011 are provided inside the bottom shell 101 at the ends of the two guide posts 34. The ends of the two guide posts 34 are respectively placed in the positioning grooves 1011. The cover 102 covers the bottom shell 101 and is connected by fasteners, pressing the ends of the two guide posts 34 tightly within the positioning grooves 1011. The two guide posts are engaged between the bottom shell and the cover of the housing, facilitating assembly of the guide posts and the housing, resulting in higher assembly efficiency.

[0028] like Figure 3 As shown, one end of the jump buckle 23 has a locking piece 231 that cooperates with the latch 28. The latch 28 is provided with a locking groove 281 that cooperates with the locking piece 231. The locking piece 231 is fastened in the locking groove 281, forming a limiting fit between the locking piece 231 and the locking groove 281. A return spring 230 is provided between the other end of the jump buckle 23 and the mechanism frame 21. The jump buckle is fastened to the locking groove of the latch by the locking piece, which can ensure that the fastening between the latch and the jump buckle is more reliable. When the latch is released, the return spring can accelerate the release action of the jump buckle, ensuring that the release action is more sensitive.

[0029] like Figure 2 and 3 As shown, a locking plate 29 is rotatably mounted on the mechanism frame 21 corresponding to the side of the locking buckle 28. A torsion spring 280 is mounted on the locking buckle 28, cooperating with the locking plate 29. The locking plate 29 and the torsion spring 280 work together to keep the locking buckle 28 and the jump buckle 23 in the engaged state. The locking plate, through the torsion spring, keeps the locking buckle and jump buckle in the engaged state, thus ensuring a more reliable engagement. During disengagement, the electromagnetic disengagement mechanism drives the locking plate to rotate, and the locking buckle loses the restraining force of the torsion spring, thus ensuring rapid disengagement of the locking buckle and jump buckle, making the disengagement action more sensitive. A positioning rod 281 is mounted on the locking buckle 28, and the torsion spring 280 is fitted onto the positioning rod 281. The first torsion arm of the torsion spring 280 abuts against the locking buckle 28, and the second torsion arm of the torsion spring 280 abuts against the locking plate 29. The torsion spring is mounted on the positioning rod of the latch, and the latch pressure plate keeps the latch and the jump latch in the latched state through the second torsion arm, which helps to improve the working reliability of the operating mechanism.

[0030] like Figure 1 and 3 As shown, lever 22 is equipped with a toggle piece 222 for driving the trip latch 23. The toggle piece 222 transmits the driving force of lever 22 to trip latch 23, causing trip latch 23 to engage with latch 28. When a line fault occurs and the operating mechanism trips, the lever drives the trip latch and latch to re-engage via the toggle piece, ensuring that the operating mechanism can be re-closed, thus improving the reliability of the operating mechanism. Trip latch 23 has an arc-shaped protrusion 232 in the middle that cooperates with the toggle piece 222. The lever drives the arc-shaped protrusion of the trip latch via the toggle piece, ensuring reliable trip latch operation and reliable engagement between the trip latch and latch.

[0031] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. An operating mechanism for a disconnecting switch, characterized in that: The device includes a housing, a linkage mechanism, and a handle shaft assembly. The handle shaft assembly is configured to transmit the rotational force of the operating handle to the linkage mechanism, thereby driving the switch body to open or close. The linkage mechanism includes a frame, a lever, a trip latch, an upper link, a lower link, and a drive component. A link shaft connects the upper and lower links. The lever is rotatably mounted on the frame and engages with the handle shaft assembly. A main spring connects the lever and the link shaft. The trip latch is rotatably mounted on the frame. An upper connecting shaft connects the upper link and the trip latch. A lower connecting shaft connects the lower link and the drive component. A latch that engages with the trip latch is rotatably mounted on the frame. The drive component is rotatably mounted on the frame and is configured to transmit the driving force of the lower link to the main shaft of the switch body, thereby causing the switch body to perform an opening or closing action.

2. The operating mechanism of the disconnecting switch according to claim 1, characterized in that: The handle shaft assembly includes a handle shaft and a slider slidably disposed within the housing. The slider is linked with a lever and causes the lever to rotate on the mechanism frame. One end of the handle shaft has a rotating shaft portion extending outside the housing and connected to the operating handle. The other end of the handle shaft is provided with a drive gear. The slider has a rack portion that meshes with the drive gear.

3. The operating mechanism of the disconnecting switch according to claim 2, characterized in that: The slider has two actuation grooves on both sides, and the lever has two levers on both sides that cooperate with the two actuation grooves. The two levers are inserted into the two actuation grooves and form a linkage between the two levers and the slider.

4. The operating mechanism of the disconnecting switch according to claim 2 or 3, characterized in that: The housing has two guide posts symmetrically arranged inside, and the slider has two guide holes that cooperate with the two guide posts. The two guide posts are respectively inserted into the two guide holes, forming a sliding connection between the slider and the two guide posts.

5. The operating mechanism of the disconnecting switch according to claim 4, characterized in that: The housing includes a bottom shell and a cover. The bottom shell has positioning grooves at both ends of two guide pillars. The two ends of the two guide pillars are respectively placed in the positioning grooves. The cover is fitted onto the bottom shell and connected by fasteners, and the cover presses the two ends of the two guide pillars tightly into the positioning grooves.

6. The operating mechanism of the disconnecting switch according to claim 1, characterized in that: The jump buckle has a locking piece at one end that cooperates with the lock buckle, and the lock buckle is provided with a locking groove that cooperates with the locking piece. The locking piece is fastened in the locking groove, and a limiting cooperation is formed between the locking piece and the locking groove. A reset tension spring is provided between the other end of the jump buckle and the mechanism frame.

7. The operating mechanism of the disconnector switch according to claim 6, characterized in that: A locking plate is rotatably mounted on the mechanism frame corresponding to the locking side, and a torsion spring is mounted on the locking plate to cooperate with the locking plate. The locking plate and the torsion spring cooperate to keep the locking plate and the snap fastener in the locked state.

8. The operating mechanism of the disconnector switch according to claim 7, characterized in that: The latch is provided with a positioning rod, the torsion spring is fitted on the positioning rod, the first torsion arm of the torsion spring abuts against the latch, and the second torsion arm of the torsion spring abuts against the latch pressure plate.

9. The operating mechanism of the disconnecting switch according to claim 1, characterized in that: The lever is equipped with a lever for driving the snap-lock action. The lever transmits the driving force of the lever to the snap-lock, causing the snap-lock to engage with the locking buckle.

10. The operating mechanism of the disconnecting switch according to claim 9, characterized in that: The jump buckle has an arc-shaped protrusion in the middle that cooperates with the actuating piece.

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