A pole-mounted circuit breaker of the post-and-gap type

Abstract

A kind of post-type built-in isolation breaking point type pole-mounted circuit breaker, including circuit breaker main body, the circuit breaker main body is installed on mounting seat, the mounting seat includes first fixed plate and second fixed plate, the circuit breaker main body bottom is fixedly arranged on the first fixed plate, a plurality of groups of shock absorption components are spaced apart between the first fixed plate and second fixed plate, the shock absorption component includes first fixed seat and second fixed seat, the first fixed seat is fixedly sleeved with first spring, the other end of the first spring is fixedly sleeved in the bottom of buffer portion, the top of the buffer portion is provided with the buffer surface that is protruding in circular arc shape, the bottom of the second fixed seat is provided with the circular arc groove that is matched on the top of buffer portion, the buffer surface and circular arc groove are slidingly fitted.

Description

Technical Field

[0001] This invention relates to a pole-mounted circuit breaker with built-in isolation break, belonging to the field of circuit breaker technology. Background Technology

[0002] Pole-mounted circuit breakers are typically installed on poles, crossarms, or supports of power distribution lines for opening and closing control and fault protection of overhead power lines. In practical applications, pole-mounted circuit breakers with built-in isolating contacts are generally used outdoors, and the circuit breaker body needs to be connected to the external support structure via a mounting base. Under the influence of opening and closing operations, external wind loads, line vibrations, and pole / tower disturbances, a certain amount of vibration and impact will be transmitted between the circuit breaker body and the mounting base. Therefore, the connection stability of the mounting base will affect the long-term reliability of the equipment.

[0003] Existing pole-mounted circuit breaker mounting bases mostly employ rigid connection structures. When the circuit breaker body is subjected to impact, the force is easily transmitted directly to the fixing plate, fasteners, and support connections. For buffer structures using only a single elastic element, they typically mainly bear unidirectional compressive loads and are insufficiently adaptable to swaying, lateral micro-displacement, or combined directional vibrations generated by the circuit breaker body. This can easily lead to stress concentration or insufficient buffer recovery at the connection points. Therefore, there is an urgent need to improve existing technologies to address the problems of insufficient buffering capacity and lack of controlled constraints on relative displacement at the mounting connections of pole-mounted circuit breakers under vibration and impact. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a pole-mounted circuit breaker with built-in isolation break.

[0005] A column-mounted circuit breaker with built-in isolation break includes a circuit breaker body, which is mounted on a mounting base. The mounting base includes a first fixing plate and a second fixing plate. The bottom of the circuit breaker body is fixedly mounted on the first fixing plate. Several sets of shock-absorbing components are spaced apart between the first fixing plate and the second fixing plate. The shock-absorbing components include a first fixing seat and a second fixing seat. A first spring is fixedly sleeved on the first fixing seat. The other end of the first spring is fixedly sleeved on the bottom of a buffer part. The top of the buffer part has a buffer surface that protrudes in an arc shape. The bottom of the second fixing seat has an arc groove that mates with the top of the buffer part. The buffer surface and the arc groove slide in contact.

[0006] Furthermore, a flexible damping sleeve is fitted around the first and second fixed seats, which can deform when the buffer part and the second fixed seat are relatively displaced.

[0007] Furthermore, a number of first fixing pins are spaced apart on the first fixing seat, and a number of second fixing pins are spaced apart on the second fixing seat. The ends of the first fixing pins and the ends of the second fixing pins pass through the flexible damping sleeve and are connected by the second spring.

[0008] Furthermore, there are four first fixing pins and four second fixing pins, which are evenly distributed on the outer periphery of the flexible damping sleeve. One end of the second spring is fixed to the end of the first fixing pin, and the other end is fixed to the end of the second fixing pin.

[0009] Furthermore, the upper end of the flexible damping sleeve is provided with a connecting groove corresponding to the second fixing pin, and the lower end is provided with a connecting hole corresponding to the first fixing pin. The second fixing pin is at least partially located in the connecting groove, and the first fixing pin is at least partially located in the connecting hole.

[0010] Furthermore, one end of the second fixing seat is fixedly mounted on the first fixing plate by a fixing bolt. The second fixing plate is provided with a limiting hole, through which one end of the first fixing seat passes and extends out of the limiting hole.

[0011] Furthermore, there is an adjustable gap between the first fixed seat and the limiting hole.

[0012] Furthermore, a connecting seat is fixed to the bottom of the first fixed seat, and a horizontally set fixed shaft is fixedly connected to the connecting seat. The fixed shafts of adjacent shock-absorbing components are connected by a third spring.

[0013] Furthermore, each fixed shaft is provided with a through hole, and the end of the third spring is fixed in the corresponding through hole.

[0014] This invention offers significant advantages: a composite damping structure, formed by a first spring, a buffer section, an arc-shaped buffer surface, and an arc-shaped groove, is provided between the first and second fixed plates. Compared to existing rigid mounting structures, this invention can absorb the load transmitted axially along the damping assembly through the first spring when the circuit breaker body is subjected to impact, and adapt to a certain range of sway or lateral micro-displacement through the sliding fit between the buffer surface and the arc-shaped groove. The flexible damping sleeve, the second spring, and the third spring between adjacent damping components further form an auxiliary buffering and reset structure, ensuring that the mounting base does not rely solely on a single elastic element to recover its position after vibration, thereby reducing the possibility of concentrated force at the connection point and making the connection between the circuit breaker body and the mounting base more stable. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a front view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the present invention.

[0019] Figure 4 for Figure 3 A magnified view of the details at point A in the middle.

[0020] Figure 5 This is a structural diagram of the shock absorption component of the present invention.

[0021] Figure 6 This is a cross-sectional view of the shock-absorbing component of the present invention.

[0022] In the diagram, 1. Circuit breaker body; 2. Mounting base; 21. First fixing plate; 22. Second fixing plate; 221. Limiting hole; 222. Movement clearance; 3. Vibration damping assembly; 31. First fixing seat; 311. First fixing pin; 312. Connecting seat; 32. Second fixing seat; 321. Arc groove; 322. Second fixing pin; 33. First spring; 34. Buffer part; 341. Buffer surface; 35. Flexible damping sleeve; 351. Connecting groove; 352. Connecting hole; 36. Second spring; 37. Fixing bolt; 38. Fixing shaft; 381. Through hole; 39. Third spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0025] The directional and positional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding this invention, and not for limiting the scope of protection of this invention.

[0026] In related technologies, the mounting structure of pole-mounted circuit breakers typically uses a rigid connection formed by a fixing plate, support frame, and fasteners. When the circuit breaker body vibrates during opening and closing operations or under external environmental disturbances, the rigid connection directly bears the load transfer, resulting in a short buffer path and insufficient adaptability to sway or lateral micro-displacements. Therefore, to improve the problems of concentrated vibration load transfer, short buffer path, and insufficient adaptability to sway or lateral micro-displacements caused by rigid connections in related technologies, this application provides a pole-mounted circuit breaker with a built-in isolation break, such as... Figures 1 to 6 As shown.

[0027] The pole-mounted circuit breaker with built-in isolation break includes a circuit breaker body 1, which is mounted on a mounting base 2. The circuit breaker body 1 can adopt a conventional pole-mounted circuit breaker structure with built-in isolation break in the art. Its internal arc extinguishing, conduction, transmission and isolation break structures can be configured according to the requirements of the power distribution line. The improvement of this embodiment focuses on the shock-absorbing connection structure between the circuit breaker body 1 and the mounting base 2.

[0028] Mounting base 2 includes a first fixing plate 21 and a second fixing plate 22. In use, the first fixing plate 21 is positioned above and spaced apart from the second fixing plate 22. The bottom of the circuit breaker body 1 is fixedly mounted on the first fixing plate 21. The first fixing plate 21 supports the circuit breaker body 1, and the second fixing plate 22 is used for installation in conjunction with external pole supports, crossarms, or other load-bearing foundations. Several sets of vibration damping components 3 are spaced between the first fixing plate 21 and the second fixing plate 22, allowing the load of the circuit breaker body 1 to be distributed and transmitted through multiple locations.

[0029] The shock-absorbing assembly 3 includes a first fixed seat 31 and a second fixed seat 32. A first spring 33 is fixedly sleeved on one end of the first fixed seat 31 facing the second fixed seat 32, and the other end of the first spring 33 is fixedly sleeved on the bottom of the buffer portion 34. The top of the buffer portion 34 has a buffer surface 341 protruding in an arc shape. The side of the second fixed seat 32 facing the buffer portion 34 has an arc-shaped groove 321 that mates with the top of the buffer portion 34, and the buffer surface 341 slides in contact with the arc-shaped groove 321. The buffer portion 34 can be a columnar, cap-shaped, or block-shaped structure, with its top machined to form an arc-shaped outer surface; the arc-shaped groove 321 matches the arc-shaped contour of the buffer surface 341, allowing them to maintain contact while also sliding within a certain range under stress.

[0030] When the circuit breaker body 1 is subjected to a vertical impact, the load is transferred from the first fixed plate 21 to the second fixed seat 32, and then from the arc groove 321 to the buffer part 34 and the first spring 33. The first spring 33 undergoes elastic compression, thereby forming a vertical buffer path. When the circuit breaker body 1 is subjected to lateral vibration or slight sway, the buffer surface 341 can slide relative to the arc groove 321, allowing the shock absorption assembly 3 to absorb the vertical impact while adapting to a certain angle change, thus avoiding instantaneous rigid impact between the second fixed seat 32 and the buffer part 34.

[0031] Through the above structure, the vibration transmission process between the circuit breaker body 1 and the mounting base 2 is decomposed into two actions: spring compression and arc surface sliding, which helps to reduce the degree of concentrated load borne by the mounting connection under instantaneous impact. As a specific embodiment, the buffer part 34 can be a wear-resistant metal part or an elastic buffer part covered with a wear-resistant layer. The inner wall of the arc groove 321 can form a smooth guide surface that matches the buffer surface 341 so as to maintain continuous contact during slight sway. As an alternative embodiment, those skilled in the art can also set the arc-shaped buffer surface 341 of the buffer part 34 as a spherical crown surface, an arc-shaped boss surface, or other curved surface structures that can slide against the groove, as long as elastic support and relative sliding can be achieved under force.

[0032] Optionally, in some embodiments, a flexible damping sleeve 35 is fitted over the first fixed seat 31 and the second fixed seat 32. The flexible damping sleeve 35 can deform when the first fixed seat 31 and the second fixed seat 32 undergo relative displacement. The flexible damping sleeve 35 can be a cylindrical sleeve that surrounds the first fixed seat 31, the second fixed seat 32, and the mating area between them. The flexible damping sleeve 35 can be made of rubber, polyurethane, or other damping materials with elastic deformation capabilities, so that it can deform in response to compression, swaying, or lateral slight displacement of the shock absorber assembly 3. The flexible damping sleeve 35 is not merely an external cover; it can provide additional damping when the first fixed seat 31 and the second fixed seat 32 undergo relative displacement, so that a portion of the impact energy is dissipated through the deformation of the sleeve.

[0033] As a specific implementation, the flexible damping sleeve 35 can be configured as an elastic cylinder with a certain wall thickness in the middle, with the two ends of the cylinder arranged around the first fixed seat 31 and the second fixed seat 32 respectively, so that it will undergo torsional or tensile deformation when the buffer part 34 slides relative to the arc groove 321.

[0034] Through this structure, the damping component 3 can not only achieve axial buffering and elastic reset through the first spring 33, but the flexible damping sleeve 35 can also provide additional damping during the relative sliding process of the arc surface, avoiding secondary impacts during the rebound process, which helps to make the vibration attenuation process of the mounting base 2 more stable. As an alternative embodiment, those skilled in the art can also form corrugated sections, thickened sections, or annular reinforcing parts on the outer wall of the flexible damping sleeve 35 to adjust its elastic deformation mode, but without changing its basic function of enclosure and deformation with relative displacement.

[0035] Optionally, in some embodiments, a plurality of first fixing pins 311 are spaced apart on the first fixing seat 31, and a plurality of second fixing pins 322 are spaced apart on the second fixing seat 32. The first fixing pins 311 and the second fixing pins 322 respectively pass through the flexible damping sleeve 35 and extend to the outside of the flexible damping sleeve 35. The ends of the first fixing pins 311 and the ends of the second fixing pins 322 are connected by a second spring 36. The first fixing pins 311 and the second fixing pins 322 respectively serve as the connection base for the second spring 36, and their ends can be located outside the flexible damping sleeve 35, so that the second spring 36 is located outside the flexible damping sleeve 35. In this way, when the first fixing seat 31 and the second fixing seat 32 are relatively offset, the distance between the first fixing pins 311 and the second fixing pins 322 changes accordingly, and the second spring 36 undergoes elastic expansion and contraction deformation, thereby applying an elastic restoring force in the opposite direction of the relative offset. This structure can convert the lateral offset of the damping component 3 into the elastic deformation of the second spring 36, forming a multi-path buffer in conjunction with the first spring 33 and the flexible damping sleeve 35.

[0036] In a specific implementation, the ends of the first fixing pin 311 and the second fixing pin 322 may be provided with annular grooves, hook holes or limiting flanges, and the two ends of the second spring 36 may be hooked or sleeved to the corresponding ends to prevent the second spring 36 from detaching during frequent vibration.

[0037] With this structure, the shock-absorbing component 3 can quickly reset after being impacted, ensuring that the first fixed seat 31 and the second fixed seat 32 do not remain in the offset position after relative displacement, but are reset by the second spring 36. As an alternative embodiment, those skilled in the art can also use an elastic band, elastic ring, or torsion spring structure to replace the second spring 36, as long as it can form an elastic connection between the first fixed pin 311 and the second fixed pin 322 and provide restoring force.

[0038] Optionally, in some embodiments, there are four first fixing pins 311 and four second fixing pins 322, which are evenly distributed on the outer periphery of the flexible damping sleeve 35. One end of the second spring 36 is fixed to the end of the first fixing pin 311, and the other end is fixed to the end of the second fixing pin 322.

[0039] Four first fixing pins 311 and four second fixing pins 322 are evenly distributed along the circumference of the flexible damping sleeve 35. A second spring 36 connects each corresponding set of first fixing pins 311 and second fixing pins 322, thereby forming a circumferential elastic recovery structure around the flexible damping sleeve 35. This arrangement ensures that the damping component 3 has corresponding elastic constraints when it is displaced in multiple directions, rather than forming a unilateral tensile force on only one side.

[0040] Specifically, when the first fixed seat 31 shifts relative to the second fixed seat 32 in any direction, the second springs 36 on the shifted side and the opposite side will undergo different degrees of elastic deformation. The second springs 36 together form a restoring force, causing the buffer part 34 to tend to return to a centered engagement state with the arc groove 321. In a specific implementation, the four first fixing pins 311 can be arranged in a cross configuration, with four second fixing pins 322 corresponding to them, so that the second springs 36 form a balanced connection along the outer periphery of the flexible damping sleeve 35. Through this structure, the vibration damping assembly 3 can better adapt to the combined directional vibrations generated by the circuit breaker body 1 during opening and closing operations, reducing the excessive stress on local elastic components. As an alternative embodiment, in scenarios where the circuit breaker body 1 is small in size or has a low load, those skilled in the art can also use three or more sets of circumferential elastic connection structures. However, this embodiment uses a four-set circumferentially distributed structure, which facilitates both connection stability and assembly convenience.

[0041] Optionally, in some embodiments, the flexible damping sleeve 35 has a connecting groove 351 at its upper end corresponding to the second fixing pin 322, and a connecting hole 352 at its lower end corresponding to the first fixing pin 311. The second fixing pin 322 is at least partially located in the connecting groove 351, and the first fixing pin 311 is at least partially located in the connecting hole 352. The connecting groove 351 provides space for the second fixing pin 322 to pass through and make room, and the connecting hole 352 provides space for the first fixing pin 311 to pass through and be positioned. The connecting groove 351 can be configured as a long groove, an arc-shaped groove, or an open groove according to the relative displacement direction of the second fixing pin 322, so that the second fixing pin 322 will not rigidly jam against the sleeve body when the flexible damping sleeve 35 deforms. The connecting hole 352 can form a relatively stable fit with the first fixing pin 311, so that one end of the flexible damping sleeve 35 maintains a relatively clear positioning relationship.

[0042] In a specific implementation, the edge of the connecting groove 351 can be rounded, and the wall of the connecting hole 352 can be fitted or clearance-fitted with the outer wall of the first fixing pin 311 to reduce local tearing problems when the flexible damping sleeve 35 undergoes repeated deformation. With this structure, the assembly relationship between the first fixing pin 311, the second fixing pin 322, and the flexible damping sleeve 35 is more stable, the second spring 36 can be stably connected to the outside of the flexible damping sleeve 35, while the flexible damping sleeve 35 still retains space to deform with the displacement of the damping component 3. As an alternative embodiment, those skilled in the art can also set the connecting groove 351 as multiple independent slots, or the connecting hole 352 as a hole structure with reinforced edges, to accommodate fixing pin ends of different shapes.

[0043] Optionally, in some embodiments, one end of the second fixing seat 32 is fixedly mounted on the first fixing plate 21 by a fixing bolt 37. The second fixing plate 22 is provided with a limiting hole 221, through which one end of the first fixing seat 31 passes and extends out of the limiting hole 221. The fixing bolt 37 is used to reliably connect the second fixing seat 32 and the first fixing plate 21, so that the load transmitted from the circuit breaker body 1 to the first fixing plate 21 can be transmitted into the second fixing seat 32. After one end of the first fixing seat 31 passes through the limiting hole 221, a positional constraint relationship can be formed between the first fixing seat 31 and the second fixing plate 22, preventing the shock absorption assembly 3 from completely detaching from the limited area of ​​the second fixing plate 22 during the stress process.

[0044] In a specific implementation, the portion of the first fixed seat 31 extending out of the limiting hole 221 can cooperate with the connecting seat 312, the stop, or other limiting structures to form an anti-detachment connection between the first fixed seat 31 and the second fixed plate 22, while still allowing for buffered displacement within a limited range. Through this structure, the first fixed plate 21, the second fixed seat 32, the buffer part 34, the first spring 33, and the first fixed seat 31 form a load transmission path from top to bottom, while the second fixed plate 22 limits the movement range of the first fixed seat 31 through the limiting hole 221. This structure maintains the assembly stability of the shock-absorbing component 3 and the mounting base 2, while also reserving necessary space for vibration damping. As an alternative embodiment, those skilled in the art can also use threaded fastening, riveting, or limiting sleeve engagement to fix the second fixed seat 32 and the first fixed plate 21, as long as the connection between the two remains intact during operation.

[0045] Optionally, in some embodiments, a movable gap 222 exists between the first fixed seat 31 and the limiting hole 221. The movable gap 222 refers to the movable space reserved between the outer wall of the first fixed seat 31 and the wall of the limiting hole 221. This space allows the first fixed seat 31 to undergo a small range of radial movement or sway when the circuit breaker body 1 is impacted. Since there is a sliding fit between the buffer surface 341 and the arc groove 321, the first fixed seat 31 does not only move axially during shock absorption. The movable gap 222 can prevent the first fixed seat 31 from making premature rigid contact with the wall of the limiting hole 221, thereby ensuring that the arc surface sliding and spring compression can be carried out in a coordinated manner.

[0046] In a specific implementation, the limiting hole 221 can be configured as a circular hole, an elliptical hole, or a polygonal hole with rounded corners. The first fixing seat 31 passes through it, forming a radial clearance between it and the hole wall. When the first fixing seat 31 deviates to the predetermined boundary, the hole wall of the limiting hole 221 blocks it, preventing further deviation. With this structure, the mounting seat 2 has a certain buffering margin without causing the shock-absorbing component 3 to wobble unrestrainedly after being subjected to force. As an alternative embodiment, those skilled in the art can also provide a wear-resistant bushing or elastic ring in the limiting hole 221 to make the contact between the first fixing seat 31 and the limiting hole 221 smoother, but the clearance 222 should still be maintained to achieve the limiting and buffering function.

[0047] Optionally, in some embodiments, a connecting seat 312 is fixed to the bottom of the first fixed seat 31, and a horizontally arranged fixed shaft 38 is fixedly connected to the connecting seat 312. The fixed shafts 38 of adjacent damping components 3 are connected by a third spring 39. The connecting seat 312 is used to connect the bottom of the first fixed seat 31 to the fixed shaft 38. The fixed shaft 38 is arranged in a horizontal direction, so that the third spring 39 can form a lateral elastic connection between adjacent damping components 3. The third spring 39 is a tension spring.

[0048] The third spring 39 can be in a natural state, a slightly pre-stretched state, or a pre-tightening force adjustable state during assembly, so as to adjust the degree of linkage response between adjacent damping components 3 according to the installation position and stress conditions of the circuit breaker body 1.

[0049] Under normal small-amplitude vibration conditions, each damping component 3 mainly relies on its own first spring 33, buffer part 34, flexible damping sleeve 35, and second spring 36 for independent deformation and reset. At this time, the third spring 39 only provides basic tension constraint between adjacent damping components 3, without significantly changing the normal buffering action of a single damping component 3. When one of the damping components 3 is subjected to a large lateral displacement, local impact, or overload, the damping component 3 generates a larger displacement difference relative to the adjacent damping components 3, and the third spring 39 is further stretched. After being stretched, the third spring 39 generates an elastic restoring force, which pulls the adjacent damping components 3 to participate in deformation through the connection positions at its two ends, thereby forming a linkage force transmission process in which a set of damping components 3 are displaced, the third spring 39 is stretched, and the adjacent damping components 3 are pulled and participate in energy dissipation.

[0050] In a specific implementation, multiple damping components 3 can be arranged at intervals along the edge, center, or corner between the first fixed plate 21 and the second fixed plate 22, with a third spring 39, a tension spring, positioned between adjacent damping components 3. The preload of the third spring 39 can be adjusted by regulating its mounting position, connecting hole position, or connecting pin position, ensuring that it does not intervene prematurely during normal small vibrations, but gradually participates in the linkage after the lateral displacement of the damping component 3 reaches a certain level. Thus, when a single damping component 3 is subjected to local impact or instantaneous overload, its displacement and load are not entirely borne by itself, but are distributed to adjacent damping components 3 through the third spring 39, allowing multiple damping components 3 to jointly participate in buffering and energy dissipation, reducing the possibility of localized force concentration.

[0051] As an alternative embodiment, those skilled in the art can also use elastic straps, elastic connecting rods, combined tension springs or other elastic connecting parts to replace the third spring 39, as long as it can be set between adjacent damping components 3 and stretched or pulled when the lateral displacement of one of the damping components 3 increases, thereby pulling the adjacent damping components 3 to participate in deformation, thus realizing elastic linkage and load distribution transmission between adjacent damping components 3.

[0052] Optionally, in some embodiments, each fixed shaft 38 is provided with a through hole 381, and the end of the third spring 39 is fixed in the corresponding through hole 381. The through hole 381 can be provided through the fixed shaft 38 radially or axially. After the end of the third spring 39 passes through the corresponding through hole 381, it can be fixed by hooking, bending, snapping, or limiting pin, so that the third spring 39 is not easy to slip off the fixed shaft 38 during vibration. Compared with simply sleeved the end of the spring on the outer circumference of the optical shaft, fixing the end of the third spring 39 in the through hole 381 can make the spring connection point clearer and reduce the possibility of the spring moving axially along the fixed shaft 38.

[0053] In a specific embodiment, the through hole 381 of the fixed shaft 38 can be located near the end of the fixed shaft 38. The hook section at the end of the third spring 39 passes through the through hole 381 and then folds back to fix it, thereby forming a mechanical limit. With this structure, the connection of the third spring 39 between adjacent damping components 3 is more stable. When the circuit breaker body 1 is subjected to vibration for a long time, the spring end can still remain on the corresponding fixed shaft 38, ensuring that the lateral linkage buffer structure continues to function. As an alternative embodiment, those skilled in the art can also provide an annular groove, a lug, or a threaded clamping part on the fixed shaft 38 to fix the end of the third spring 39, as long as a reliable connection between the end of the third spring 39 and the fixed shaft 38 can be achieved.

[0054] The overall working principle of this application is as follows: The circuit breaker body 1 is fixed on the first fixing plate 21, and the circuit breaker body 1 forms a buffer connection with multiple sets of shock-absorbing components 3 through the first fixing plate 21. When the circuit breaker body 1 is impacted by opening and closing operations or external vibration, the second fixing seat 32 bears the load along with the first fixing plate 21, and the arc groove 321 transmits the load to the buffer part 34. The buffer part 34 compresses the first spring 33 to absorb the axial impact. When there is a sway or lateral component in the load, the buffer surface 341 slides relative to the arc groove 321, and the first fixing seat 31 is displaced within the range defined by the limiting hole 221 and the movable gap 222. The flexible damping sleeve 35 deforms with the relative displacement of the first fixed seat 31 and the second fixed seat 32 to absorb the impact force. The second spring 36 provides a restoring force in the circumferential direction. Under normal small-amplitude vibration, each damping component 3 mainly relies on its own first spring 33, buffer part 34, flexible damping sleeve 35 and second spring 36 for independent buffering and restoring. The third spring 39 mainly plays the role of basic connection and position constraint, and does not significantly restrict the normal small deformation of a single damping component 3. When one group of damping components 3 is subjected to a large lateral displacement, local impact or overload, the displacement difference between the damping component 3 and the adjacent damping component 3 increases. The third spring 39 is stretched and generates an elastic restoring force, which in turn pulls the adjacent damping components 3 to participate in deformation and energy dissipation. Through the above structure, the vibration and impact received by the circuit breaker body 1 can be locally buffered by the corresponding damping component 3. When the local displacement or load increases to the point that the third spring 39 is further stretched, the adjacent damping components 3 gradually participate in linkage buffering, thereby dispersing and transmitting the local load to the surrounding damping components 3.

[0055] This working method enables multiple sets of damping components 3 to maintain relatively independent buffering capacity under small vibration conditions, and to achieve gradual linkage through the third spring 39 under large impact or overload conditions, reducing the force concentration of individual damping components 3 and their connecting parts, and making the vibration transmission process between the circuit breaker body 1 and the mounting base 2 more stable.

[0056] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

[0057] While the invention has been described with reference to several specific embodiments, it should be understood that the invention is not limited to the disclosed specific embodiments. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A pole-mounted circuit breaker with built-in isolation break, characterized in that: The circuit breaker includes a main body mounted on a mounting base. The mounting base includes a first fixing plate and a second fixing plate. The bottom of the circuit breaker main body is fixedly mounted on the first fixing plate. Several sets of shock-absorbing components are spaced apart between the first fixing plate and the second fixing plate. Each shock-absorbing component includes a first fixing seat and a second fixing seat. A first spring is fixedly sleeved on the first fixing seat, and the other end of the first spring is fixedly sleeved on the bottom of a buffer part. The top of the buffer part has a circularly protruding buffer surface. The bottom of the second fixing seat has a circularly protruding groove that mates with the top of the buffer part. The buffer surface and the circularly protruding groove... Sliding fit; a flexible damping sleeve is sleeved on the outside of the first fixed seat and the second fixed seat, the flexible damping sleeve can deform when the buffer part and the second fixed seat are relatively displaced; a plurality of first fixing pins are spaced apart on the first fixed seat, a plurality of second fixing pins are spaced apart on the second fixed seat, the ends of the first fixing pins and the ends of the second fixing pins pass through the flexible damping sleeve and are connected by a second spring; there are four first fixing pins and four second fixing pins, which are evenly distributed on the outer periphery of the flexible damping sleeve, one end of the second spring is fixedly mounted on the end of the first fixing pin, and the other end is fixedly mounted on the end of the second fixing pin.

2. The pole-mounted circuit breaker with built-in isolation break as described in claim 1, characterized in that: The flexible damping sleeve has a connecting groove at its upper end corresponding to the second fixing pin and a connecting hole at its lower end corresponding to the first fixing pin. The second fixing pin is at least partially located in the connecting groove, and the first fixing pin is at least partially located in the connecting hole.

3. The pole-mounted circuit breaker with built-in isolation break as described in claim 1, characterized in that: One end of the second fixing seat is fixed to the first fixing plate by a fixing bolt. The second fixing plate is provided with a limiting hole, and one end of the first fixing seat passes through and extends out of the limiting hole.

4. The pole-mounted circuit breaker with built-in isolation break as described in claim 3, characterized in that: There is a movable gap between the first fixed seat and the limiting hole.

5. The pole-mounted circuit breaker with built-in isolation break as described in claim 1, characterized in that: The first fixed base has a connecting base fixed at its bottom, and the connecting base is fixedly connected to a horizontally arranged fixed shaft. The fixed shafts of adjacent shock-absorbing components are connected by a third spring.

6. The pole-mounted circuit breaker with built-in isolation break as described in claim 5, characterized in that: Each of the fixed shafts is provided with a through hole, and the end of the third spring is fixed in the corresponding through hole.

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