Interlocking mechanism

Abstract

The utility model belongs to the technical field of power equipment, and discloses an interlocking mechanism, which comprises a guide assembly and an interlocking assembly, and is characterized in that the guide assembly is fixed on a circuit breaker mechanism box; the interlocking assembly is slidably arranged on the guide assembly and connected with the operating rod, and the interlocking assembly slides relative to the guide assembly and has a first position and a second position; an operating rod of the circuit breaker enables the interlocking assembly to be kept at a first position when the circuit breaker is switched on, the interlocking assembly and the main shaft form limiting fit for limiting circumferential rotation of the main shaft, and interlocking of the three-station disconnecting switch is achieved. The main shaft can rotate and push the interlocking assembly to a second position when the circuit breaker is opened, and when the interlocking assembly is located at the second position, the interlocking assembly and the operating rod form limiting cooperation for limiting the operating rod from pushing towards the outside of the circuit breaker mechanism box, and interlocking of the circuit breaker is achieved. The interlocking mechanism provided by the utility model effectively prevents misoperation of the three-position disconnecting switch and the circuit breaker.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field especially relates to a interlocking mechanism. BACKGROUND

[0002] In the power transmission and distribution system, three-position disconnecting switch and circuit breaker in high voltage switchgear are often used together, and the three-position disconnecting switch and circuit breaker must be operated according to fixed operation sequence, if misoperation, will easily lead to unexpected occurrence. Therefore, an interlocking mechanism is needed to solve the above technical problems. SUMMARY

[0003] The utility model discloses a interlocking mechanism can effectively prevent the misoperation of three-position disconnecting switch and circuit breaker.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] Provide a interlocking mechanism for the interlocking of circuit breaker and three-position disconnecting switch, the circuit breaker includes operating rod, the three-position disconnecting switch includes main shaft, the interlocking mechanism includes:

[0006] Guide assembly is fixed on the circuit breaker mechanism box;

[0007] Interlocking assembly is slidably arranged in the guide assembly, and is connected with the operating rod, and the interlocking assembly has first position and second position relative to the guide assembly;

[0008] The operating rod makes the interlocking assembly keep in the first position when the circuit breaker is closed, and the interlocking assembly and the main shaft form a limit position cooperation that limits the circumferential rotation of the main shaft, realizing the interlocking of the three-position disconnecting switch;

[0009] The main shaft can rotate and push the interlocking assembly to the second position when the circuit breaker is opened, and the interlocking assembly forms a limit position cooperation with the operating rod when being in the second position, which limits the pushing of the operating rod to the outside of the circuit breaker mechanism box, realizing the interlocking of the circuit breaker.

[0010] Optionally, the guide assembly includes guide rod, and the guide rod is fixed on the circuit breaker mechanism box;

[0011] The interlocking assembly includes first pressing piece and sliding sleeve, the first end of the first pressing piece is connected with the operating rod, the second end of the first pressing piece is connected with the sliding sleeve, and the sliding sleeve is slidably arranged on the guide rod.

[0012] Optionally, the interlocking assembly further comprises two screw sleeve members, the first end of the first pressing member is clamped between the two screw sleeve members, the first end of the first pressing member and the two screw sleeve members are sleeved on the operating rod, and the two screw sleeve members are threadedly connected with the operating rod.

[0013] Optionally, the main shaft is provided with a mounting hole in the radial direction, the interlocking rod is arranged to pass through the mounting hole, and both ends of the interlocking rod extend out of the mounting hole;

[0014] The interlocking assembly further comprises an interlocking plate, a first end of the interlocking plate is connected with the first pressing member;

[0015] When the interlocking assembly is in the first position, the second end of the interlocking plate abuts against the circumferential portions of both ends of the interlocking rod along the axial direction of the guide rod, thereby limiting the rotation of the main shaft when the circuit breaker is closed.

[0016] Optionally, the guide assembly further comprises a limiting support, the limiting support is fixed on the circuit breaker mechanism box;

[0017] When the interlocking assembly is in the second position, the interlocking plate abuts against the top of the limiting support along the axial direction of the guide rod.

[0018] Optionally, the interlocking plate is provided with a guide groove;

[0019] The guide assembly further comprises a limiting support and a guide member, the limiting support is fixed on the circuit breaker mechanism box, a first end of the guide member is provided with a limiting protrusion, and a second end of the guide member passes through the guide groove and is connected with the limiting support.

[0020] Optionally, the interlocking plate is in a stepped shape and comprises a first plate portion, a second plate portion, a third plate portion, a fourth plate portion and a fifth plate portion connected in sequence, the first plate portion is connected with the first pressing member, and the second plate portion is provided with a guide groove;

[0021] The guide assembly comprises a limiting support and a guide member, the limiting support is fixed on the circuit breaker mechanism box, a first end of the guide member is provided with a limiting protrusion, and a second end of the guide member passes through the guide groove and is connected with the limiting support;

[0022] When the interlocking assembly is in the first position, the top of the fifth plate portion abuts against the circumferential portions of both ends of the interlocking rod along the axial direction of the guide rod;

[0023] When the interlocking assembly is in the second position, the top of the limiting support abuts against the third plate portion along the axial direction of the guide rod.

[0024] Optionally, an elastic member is arranged between the guide assembly and the interlocking assembly, and the elastic member makes the interlocking assembly have a tendency to slide from the second position to the first position.

[0025] Optionally, the guide assembly comprises a guide rod and a limiting support, and the guide rod and the limiting support are both fixed on the circuit breaker mechanism box, and a limiting plate is arranged on the limiting support.

[0026] The interlocking assembly comprises a first pressing piece and a sliding sleeve, the first end of the first pressing piece is connected with the operating rod, the second end of the first pressing piece is connected with the sliding sleeve, and the sliding sleeve is slidably arranged on the guide rod.

[0027] The elastic member is sleeved on the guide rod, and one end of the elastic member abuts against the first pressing piece or the sliding sleeve, and the other end of the elastic member abuts against the limiting plate.

[0028] Optionally, a micro switch is further arranged, and the micro switch is fixed on the circuit breaker mechanism box.

[0029] The interlocking assembly further comprises a second pressing piece, and the second pressing piece is connected with the operating rod.

[0030] When the interlocking assembly is in the second position, the second pressing piece abuts against the triggering element of the micro switch and triggers the micro switch.

[0031] Beneficial effects: the interlocking mechanism provided by the utility model can support the interlocking assembly by the operating rod when the circuit breaker is closed, so that the interlocking assembly is kept in the first position, and the interlocking assembly and the main shaft form a limiting cooperation to limit the circumferential rotation of the main shaft, that is, the interlocking assembly limits the circumferential rotation of the main shaft, so that the three-position disconnecting switch cannot be operated, thereby realizing the interlocking of the three-position disconnecting switch; when the circuit breaker is opened, the main shaft can rotate, that is, the three-position disconnecting switch can be operated, and the rotation of the main shaft can push the interlocking assembly, so that the interlocking assembly slides from the first position to the second position, and when the interlocking assembly is in the second position, the operating rod keeps the circuit breaker open, and the interlocking assembly and the operating rod form a limiting cooperation to limit the pushing of the operating rod to the outside of the circuit breaker mechanism box, that is, the circuit breaker cannot be closed, thereby realizing the interlocking of the circuit breaker, and effectively preventing the misoperation of the three-position disconnecting switch and the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the structure schematic view of the interlocking mechanism provided by the utility model and the three-position disconnecting switch and the circuit breaker when the interlocking assembly is in the first position.

[0033] Figure 2 is the structure schematic view of the interlocking mechanism provided by the utility model and the operating rod and the main shaft when the interlocking assembly is in the first position.

[0034] Figure 3 is the partial structure schematic view of the interlocking mechanism of the interlocking assembly in the second position, three-position disconnecting switch and circuit breaker provided by the utility model;

[0035] Figure 4 is the structure schematic view of the first pressing piece provided by the utility model;

[0036] Figure 5 is the structure schematic view of the sliding sleeve provided by the utility model;

[0037] Figure 6 is the structure schematic view of the interlocking plate provided by the utility model.

[0038] In the drawing:

[0039] 11, operating rod; 12, mechanism box; 20, main shaft;

[0040] 100, guiding assembly; 101, perforation; 110, guiding rod; 120, limiting support; 121, fifth connecting hole; 130, guiding piece; 131, limiting protrusion; 140, limiting plate;

[0041] 200, interlocking assembly; 210, first pressing piece; 211, first connecting hole; 212, second connecting hole; 220, sliding sleeve; 221, limiting step; 230, screw piece; 240, interlocking plate; 2401, first plate part; 2402, second plate part; 2403, third plate part; 2404, fourth plate part; 2405, fifth plate part; 241, third connecting hole; 242, U-shaped groove; 243, guiding groove; 244, accommodating groove; 250, second pressing piece;

[0042] 300, interlocking rod;

[0043] 400, elastic piece;

[0044] 500, micro switch. DETAILED DESCRIPTION

[0045] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.

[0046] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element mutual action relation.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0047] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0048] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or position relationship is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0049] Referring to Figures 1 to 3 As shown in the figure, the embodiment provides an interlocking mechanism for the interlocking of the circuit breaker and the three-position disconnector.

[0050] Specifically, the circuit breaker includes an operating rod 11, and the three-position disconnector includes a main shaft 20.

[0051] Specifically, the interlocking mechanism comprises a guide assembly 100 and an interlocking assembly 200, wherein the guide assembly 100 is fixed on the circuit breaker mechanism box 12; the interlocking assembly 200 is slidingly arranged on the guide assembly 100, the interlocking assembly 200 is connected with the operating rod 11, and the interlocking assembly 200 has a first position and a second position relative to the guide assembly 100. When the circuit breaker is closed, the operating rod 11 keeps the interlocking assembly 200 at the first position, and the interlocking assembly 200 forms a limiting fit with the main shaft 20 to limit the circumferential rotation of the main shaft 20, thereby realizing the interlocking of the three-position disconnector; when the circuit breaker is opened, the main shaft 20 can rotate and push the interlocking assembly 200 to the second position, and the interlocking assembly 200 forms a limiting fit with the operating rod 11 to limit the pushing of the operating rod 11 out of the circuit breaker mechanism box 12, thereby realizing the interlocking of the circuit breaker.

[0052] In the embodiment, when the circuit breaker is closed, the operating rod 11 supports the interlocking assembly 200 to keep the interlocking assembly 200 at the first position, and the interlocking assembly 200 forms a limiting fit with the main shaft 20 to limit the circumferential rotation of the main shaft 20, thereby realizing the interlocking of the three-position disconnector; when the circuit breaker is opened, the main shaft 20 can rotate, i.e. the three-position disconnector can be operated, and the rotation of the main shaft 20 can push the interlocking assembly 200 to slide from the first position to the second position, and when the interlocking assembly 200 is at the second position, the operating rod 11 keeps the circuit breaker open, and the interlocking assembly 200 forms a limiting fit with the operating rod 11 to limit the pushing of the operating rod 11 out of the circuit breaker mechanism box 12, i.e. the circuit breaker cannot be closed, thereby realizing the interlocking of the circuit breaker, and effectively preventing the misoperation of the three-position disconnector and the circuit breaker.

[0053] It can be understood that the operating rod 11 can slide relative to the mechanism box 12 in the axial direction, the sliding direction of the interlocking assembly 200 is the same as the sliding direction of the operating rod 11, and the interlocking assembly 200 can smoothly drive the operating rod 11 to slide. In the embodiment, the length of the operating rod 11 extending out of the mechanism box 12 when the circuit breaker is closed is greater than the length of the operating rod 11 extending out of the mechanism box 12 when the interlocking assembly 200 is at the second position. In the embodiment, the position of the operating rod 11 when the circuit breaker is closed can be defined as a high position, and the position of the operating rod 11 when the interlocking assembly 200 is at the second position can be defined as a low position. When the circuit breaker is closed, the operating rod 11 can be stably kept at the high position, i.e. through the support of the operating rod 11, the interlocking assembly 200 can be stably kept at the first position; when the circuit breaker is opened, the operating rod 11 can slide between the low position and the high position, i.e. the main shaft 20 can push the interlocking assembly 200 from the first position to the second position. When the operating rod 11 is at the low position, the circuit breaker is in the open state and cannot be operated.

[0054] Understandably, the spindle 20 may be connected to a baffle (not shown). When the interlock assembly 200 is in the first position, the interlock assembly 200 restricts the rotation of the spindle 20, and the baffle blocks the operating hole (not shown) of the three-position disconnect switch, preventing the three-position disconnect switch from being operated. When the spindle 20 pushes the interlock assembly 200 to the second position, the baffle leaves the operating hole, exposing the operating hole, and the three-position disconnect switch can be operated.

[0055] In this embodiment, reference is made to Figures 1 to 5 As shown, the guide assembly 100 includes a guide rod 110, which is fixed to the circuit breaker mechanism box 12. The interlocking assembly 200 includes a first pressing member 210 and a sliding sleeve 220. The first end of the first pressing member 210 is connected to the operating rod 11, and the second end of the first pressing member 210 is connected to the sliding sleeve 220. The sliding sleeve 220 is slidably sleeved on the guide rod 110. It can be understood that the guide rod 110 and the operating rod 11 are arranged parallel to each other. In this embodiment, the sliding sleeve 220 and the guide rod 110 have a good guiding effect, which can make the interlocking assembly 200 slide stably along the axial direction of the guide rod 110, preventing the interlocking assembly 200 from generating linear motion in other directions. Moreover, the interlocking assembly 200, through the first pressing member 210, stably pushes the operating rod 11 along the axial direction of the guide rod 110, effectively ensuring the stable and reliable linkage between the interlocking assembly 200 and the operating rod 11.

[0056] In one feasible implementation, the interlocking assembly 200 further includes two screw fittings 230 (not shown). The first end of the first pressing member 210 is clamped between the two screw fittings 230. The first end of the first pressing member 210 and the two screw fittings 230 are both sleeved on the operating rod 11, and the two screw fittings 230 are threadedly connected to the operating rod 11. In this embodiment, by adjusting the position of the two screw fittings 230 relative to the operating rod 11, the position of the first pressing member 210 relative to the operating rod 11 is adjusted to debug the linkage between the interlocking assembly 200 and the operating rod 11, ensuring that when the operating rod 11 is in the high position, the interlocking assembly 200 remains in the first position; and ensuring that when the interlocking assembly 200 is in the second position, the operating rod 11 remains in the low position.

[0057] For example, the first pressure member 210 may be plate-shaped or rod-shaped.

[0058] For example, the first pressure member 210 is arranged perpendicularly to the guide rod 110.

[0059] For example, the first pressure member 210 is provided with a first connecting hole 211 through which the operating rod 11 passes. The first connecting hole 211 can be an elongated hole to facilitate adjustment of the position of the first pressure member 210. For example, multiple first connecting holes 211 are provided at intervals along the length of the first pressure member 210, such as two, to meet the needs of different distances between the operating rod 11 and the spindle 20.

[0060] Exemplarily, the screw sleeve 230 can be a nut.

[0061] Exemplarily, a gasket (not shown) can be arranged between the screw sleeve 230 and the first pressing piece 210.

[0062] Exemplarily, a pin shaft (not shown) can be arranged on the guide rod 110 to prevent the screw sleeve from being separated from the guide rod 110.

[0063] Exemplarily, the sliding sleeve 220 can be connected with the first pressing piece 210 by a threaded connection.

[0064] Exemplarily, a limiting step 221 is arranged on the periphery of the sliding sleeve 220, and the limiting step 221 abuts against the first pressing piece 210 to realize positioning assembly.

[0065] In the embodiment, referring to Figs. 1 to 3, Figure 1 , Figure 2 , Figure 3 and Figure 6 , the interlocking mechanism further comprises an interlocking rod 300, the main shaft 20 is provided with a mounting hole in the radial direction, the interlocking rod 300 is arranged in the mounting hole, and both ends of the interlocking rod 300 extend out of the mounting hole; the interlocking assembly 200 further comprises an interlocking plate 240, the first end of the interlocking plate 240 is connected with the first pressing piece 210; when the interlocking assembly 200 is in the first position, the second end of the interlocking plate 240 abuts against the periphery of both ends of the interlocking rod 300 along the axial direction of the guide rod 110, thereby limiting the rotation of the main shaft 20 when the circuit breaker is closed, and the interlocking assembly 200 is stable and reliable. In the embodiment, the first pressing piece 210 and the interlocking plate 240 cooperate to realize the interlocking of the circuit breaker and the three-position disconnector at a relatively long distance.

[0066] Exemplarily, the interlocking plate 240 can be connected with the first pressing piece 210 by a bolt fastening manner. Specifically, the first pressing piece 210 is provided with a second connecting hole 212 for the bolt to pass through, and the interlocking plate 240 is provided with a third connecting hole 241 for the bolt to pass through. Exemplarily, the second connecting hole 212 is provided with two and is arranged symmetrically with respect to the center of the sliding sleeve 220, and the third connecting hole 241 is provided with two and is arranged one by one corresponding to the second connecting hole 212.

[0067] Exemplarily, the third connecting hole 241 can be an elongated hole.

[0068] Exemplarily, the interlocking plate 240 is provided with a U-shaped groove 242 for the sliding sleeve 220.

[0069] In an embodiment, the guide assembly 100 further comprises a limiting support 120 fixed to the circuit breaker mechanism box 12; when the interlocking assembly 200 is in the second position, the interlocking plate 240 abuts against the top of the limiting support 120 along the axial direction of the guide rod 110, so as to ensure the sliding accuracy of the interlocking assembly 200 and prevent the interlocking assembly 200 from being excessively pressed against the operating rod 11.

[0070] In an embodiment, the interlocking plate 240 is provided with a guide groove 243, and the guide assembly 100 further comprises a guide piece 130, the first end of the guide piece 130 is provided with a limiting protrusion 131, and the second end of the guide piece 130 penetrates through the guide groove 243 and is connected with the limiting support 120. In this embodiment, the limiting protrusion 131 cooperates with the limiting support 120 to effectively prevent the interlocking plate 240 from being offset along the axial direction of the guide piece 130, and under the guidance of the guide piece 130 and the guide groove 243, the interlocking plate 240 can stably move along the axial direction of the guide rod 110.

[0071] For example, when the circuit breaker is closed, the peripheral portion of the guide piece 130 can be limitedly matched with the groove wall of the guide groove 243 along the axial direction of the guide rod 110, so as to ensure the sliding accuracy of the interlocking assembly 200 and prevent the sliding sleeve 220 from being separated from the guide rod 110.

[0072] For example, the interlocking plate 240 is in a stepped shape and comprises a first plate portion 2401, a second plate portion 2402, a third plate portion 2403, a fourth plate portion 2404 and a fifth plate portion 2405 connected in sequence, the first plate portion 2401 is connected with the first pressing piece 210, and the second plate portion 2402 is provided with the guide groove 243; when the interlocking assembly 200 is in the first position, the top of the fifth plate portion 2405 abuts against the peripheral portion of both ends of the interlocking rod 300 along the axial direction of the guide rod 110; and when the interlocking assembly 200 is in the second position, the top of the limiting support 120 abuts against the third plate portion 2403 along the axial direction of the guide rod 110. In this embodiment, the interlocking plate 240 is provided in a stepped structure, so as to effectively ensure the compact structure of the interlocking mechanism.

[0073] For example, the first plate portion 2401 is provided with a third connecting hole 241 and a U-shaped groove 242.

[0074] For example, the guide groove 243 can extend to the third plate portion 2403 and the fourth plate portion 2404.

[0075] For example, the fourth plate portion 2404 is connected to two fifth plate portions 2405, and a clearance groove 244 is formed between the two fifth plate portions 2405 to allow space for the main shaft 20, preventing the main shaft 20 from contacting the interlocking plate 240. When the interlocking assembly 200 is in the first position, the two ends of the interlocking rod 300 abut against the two fifth plate portions 2405 respectively. For example, the clearance groove 244 may extend to the fourth plate portion 2404.

[0076] In this embodiment, reference is made to Figures 1 to 3 As shown, an elastic element 400 is provided between the guide assembly 100 and the interlocking assembly 200. The elastic element 400 causes the interlocking assembly 200 to tend to slide from the second position to the first position. In this embodiment, the operating lever 11 is usually connected to an elastic reset element (not shown), that is, the operating lever 11 can be held in a high position when it is not subjected to any external force. By providing the elastic element 400 between the guide assembly 100 and the interlocking assembly 200, the force on the interlocking assembly 200 can be balanced, preventing the interlocking assembly 200 from tilting and effectively preventing the interlocking assembly 200 from sliding and jamming. In addition, when the spindle 20 rotates to give way to the interlocking assembly 200, the interlocking assembly 200 can be reset from the second position to the first position under the action of the elastic element 400.

[0077] For example, the elastic element 400 can be a spring.

[0078] Specifically, the limiting bracket 120 is provided with a limiting plate 140, the elastic element 400 is sleeved on the guide rod 110, and one end of the elastic element 400 abuts against the first pressing element 210 or the sliding sleeve 220, and the second end of the elastic element 400 abuts against the limiting plate 140.

[0079] For example, the limiting bracket 120 can be L-shaped, with the first side of the limiting bracket 120 fixed to the circuit breaker mechanism box 12, which is stable and reliable, and a limiting plate 140 is provided on the second side of the limiting bracket 120.

[0080] For example, the limiting plate 140 may be L-shaped, and its first side can be connected to the limiting bracket 120 by bolt fastening. For example, the first side of the limiting plate 140 is provided with a fourth connecting hole for bolts to pass through, and the second side of the limiting bracket 120 is provided with a fifth connecting hole 121 for bolts to pass through. The fifth connecting hole 121 may be an elongated hole to facilitate adjustment of the position of the limiting plate 140, thereby adjusting the force exerted by the elastic element 400 on the interlocking assembly 200.

[0081] For example, both the first side of the limiting bracket 120 and the second side of the limiting plate 140 are provided with through holes 101 through which the guide rod 110 can pass, so as to ensure the structural compactness of the interlocking mechanism. The through hole 101 can be an elongated hole.

[0082] In the embodiment, the interlocking mechanism further comprises a micro switch 500 fixed on the circuit breaker mechanism box 12, and the interlocking assembly 200 abuts against and triggers the micro switch 500 when the interlocking assembly 200 is in the second position. Figures 1 to 3 As shown in the figure, the interlocking mechanism further comprises a micro switch 500 fixed on the circuit breaker mechanism box 12, and the interlocking assembly 200 abuts against and triggers the micro switch 500 when the interlocking assembly 200 is in the second position.

[0083] Specifically, the interlocking assembly 200 further comprises a second pressing piece 250 connected with the operating rod 11, and the second pressing piece 250 abuts against and triggers the micro switch 500 when the interlocking assembly 200 is in the second position.

[0084] The connection mode of the second pressing plate and the operating rod 11 can be the same as or different from the connection mode of the first pressing piece 210 and the operating rod 11, which is not limited in the application.

[0085] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the implementation mode of the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An interlocking mechanism for interlocking a circuit breaker and a three-position disconnector, the circuit breaker including an operating lever (11) and the three-position disconnector including a main shaft (20), characterized in that, The interlocking mechanism includes: A guide assembly (100) is fixed to the circuit breaker mechanism box (12); An interlocking assembly (200) is slidably disposed on the guide assembly (100) and connected to the operating lever (11). The interlocking assembly (200) has a first position and a second position relative to the guide assembly (100). When the circuit breaker is closed, the operating lever (11) keeps the interlocking assembly (200) in the first position. The interlocking assembly (200) and the main shaft (20) form a limiting fit that restricts the circumferential rotation of the main shaft (20), thereby realizing the interlocking of the three-position disconnecting switch. The main shaft (20) can rotate and push the interlocking assembly (200) to the second position when the circuit breaker is tripped. When the interlocking assembly (200) is in the second position, it forms a limiting engagement with the operating rod (11) to restrict the operating rod (11) from pushing outward to the circuit breaker mechanism box (12), thereby realizing the interlocking of the circuit breaker.

2. The interlocking mechanism according to claim 1, characterized in that, The guide assembly (100) includes a guide rod (110) which is fixed to the circuit breaker mechanism box (12); The interlocking assembly (200) includes a first pressure member (210) and a sliding sleeve (220). The first end of the first pressure member (210) is connected to the operating rod (11), and the second end of the first pressure member (210) is connected to the sliding sleeve (220). The sliding sleeve (220) is slidably sleeved on the guide rod (110).

3. The interlocking mechanism according to claim 2, characterized in that, The interlocking assembly (200) further includes two screw fittings (230), the first end of the first pressure member (210) is clamped between the two screw fittings (230), the first end of the first pressure member (210) and the two screw fittings (230) are both sleeved on the operating rod (11), and the two screw fittings (230) are threadedly connected to the operating rod (11).

4. The interlocking mechanism according to claim 2 or 3, characterized in that, The main shaft (20) is provided with a mounting hole in the radial direction, and the interlocking rod (300) passes through the mounting hole, with both ends of the interlocking rod (300) extending out of the mounting hole; The interlocking assembly (200) further includes an interlocking plate (240), the first end of which is connected to the first pressure member (210); When the interlocking assembly (200) is in the first position, the top of the second end of the interlocking plate (240) abuts against the periphery of both ends of the interlocking rod (300) along the axial direction of the guide rod (110), thereby restricting the rotation of the main shaft (20) when the circuit breaker is closed.

5. The interlocking mechanism according to claim 4, characterized in that, The guide assembly (100) further includes a limiting bracket (120), which is fixed to the circuit breaker mechanism box (12); When the interlocking assembly (200) is in the second position, the interlocking plate (240) abuts against the top of the limiting bracket (120) along the axial direction of the guide rod (110).

6. The interlocking mechanism according to claim 4, characterized in that, The interlocking plate (240) is provided with a guide groove (243); The guide assembly (100) further includes a limiting bracket (120) and a guide member (130). The limiting bracket (120) is fixed on the circuit breaker mechanism box (12). The first end of the guide member (130) is provided with a limiting protrusion (131). The second end of the guide member (130) passes through the guide groove (243) and is connected to the limiting bracket (120).

7. The interlocking mechanism according to claim 4, characterized in that, The interlocking plate (240) is stepped and includes a first plate part (2401), a second plate part (2402), a third plate part (2403), a fourth plate part (2404) and a fifth plate part (2405) connected in sequence. The first plate part (2401) is connected to the first pressure member (210), and the second plate part (2402) is provided with a guide groove (243). The guide assembly (100) includes a limiting bracket (120) and a guide member (130). The limiting bracket (120) is fixed on the circuit breaker mechanism box (12). The first end of the guide member (130) is provided with a limiting protrusion (131). The second end of the guide member (130) passes through the guide groove (243) and is connected to the limiting bracket (120). When the interlocking assembly (200) is in the first position, the top of the fifth plate (2405) abuts against both ends of the interlocking rod (300) along the axial direction of the guide rod (110); When the interlocking assembly (200) is in the second position, the top of the limiting bracket (120) abuts against the third plate (2403) along the axial direction of the guide rod (110).

8. The interlocking mechanism according to claim 1, characterized in that, An elastic element (400) is provided between the guide assembly (100) and the interlocking assembly (200), the elastic element (400) causing the interlocking assembly (200) to have a tendency to slide from the second position to the first position.

9. The interlocking mechanism according to claim 8, characterized in that, The guide assembly (100) includes a guide rod (110) and a limiting bracket (120). The guide rod (110) and the limiting bracket (120) are both fixed on the circuit breaker mechanism box (12). The limiting bracket (120) is provided with a limiting plate (140). The interlocking assembly (200) includes a first pressing member (210) and a sliding sleeve (220). The first end of the first pressing member (210) is connected to the operating rod (11), and the second end of the first pressing member (210) is connected to the sliding sleeve (220). The sliding sleeve (220) is slidably sleeved on the guide rod (110). The elastic element (400) is sleeved on the guide rod (110), and one end of the elastic element (400) abuts against the first pressure member (210) or the sliding sleeve (220), and the second end of the elastic element (400) abuts against the limiting plate (140).

10. The interlocking mechanism according to claim 1, characterized in that, It also includes a micro switch (500), which is fixed to the circuit breaker mechanism box (12); The interlocking assembly (200) further includes a second pressure member (250), which is connected to the operating lever (11); When the interlocking assembly (200) is in the second position, the second pressing member (250) abuts against the triggering element of the micro switch (500) and triggers the micro switch (500).

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