circuit breaker

Abstract

The application relates to a circuit breaker, comprising: a tripping device, the tripping device comprising a main body part and a movable part, the movable part being capable of moving relative to the main body part to switch between a closed position and an open position; a spring operating mechanism, the spring operating mechanism comprising a spring reset part and a mechanical matching part, the spring reset part being installed on the movable part, wherein the mechanical matching part is capable of abutting against the movable part during opening of the movable part and moving from a first matching position to a second matching position under the pushing of the movable part; the spring reset part is capable of abutting against the mechanical matching part during movement of the mechanical matching part from the first matching position to the second matching position and being elastically deformed under the pushing of the mechanical matching part; and the spring reset part is capable of resetting from the second matching position to the first matching position during movement of the movable part from the open position to the closed position. The circuit breaker can better complete the resetting function of the movable part of the tripping device when the circuit breaker is opened.

Description

Technical Field

[0001] This application belongs to the field of switchgear technology, specifically relating to a circuit breaker. Background Technology

[0002] Currently, circuit breaker trip units all use an electromagnetic coil in the spring-operated mechanism to reset the moving iron core of the trip unit from the open position to the closed position, or to keep the moving iron core stationary in the closed position, thus achieving the trip unit's reset function simultaneously with the circuit breaker's opening. However, in this process, the coil is often prone to burnout, ultimately resulting in the trip unit failing to complete its reset function. Summary of the Invention

[0003] The purpose of this invention is to provide a circuit breaker that can better complete the reset function of the trip unit's moving part when the circuit breaker is tripped.

[0004] The first aspect of this invention discloses a circuit breaker, comprising: a trip unit, the trip unit including a main body and a movable part, the movable part being movable relative to the main body to switch between a closed position and an open position; a spring-operated mechanism, the spring-operated mechanism including an elastic reset member and a mechanical engaging member, the elastic reset member being mounted on the movable part, wherein the mechanical engaging member is capable of abutting against the movable part during the opening process of the movable part, and moving from a first engaging position to a second engaging position under the push of the movable part; the elastic reset member is capable of abutting against the mechanical engaging member during the movement of the mechanical engaging member from the first engaging position to the second engaging position, and undergoing elastic deformation under the push of the mechanical engaging member; the thrust between the mechanical engaging member and the movable part disappears when the mechanical engaging member moves to the second engaging position, and the elastic reset member is capable of restoring its deformation when the mechanical engaging member moves to the second engaging position, thereby driving the movable part to move from the open position to the closed position; the elastic reset member is capable of returning from the second engaging position to the first engaging position during the movement of the movable part from the open position to the closed position.

[0005] In an exemplary embodiment of the present invention, the elastic reset member includes a first reset plate, a second reset plate, and a first elastic member. The first reset plate is fixedly connected to one end of the movable part, and the second reset plate is slidably connected to one end of the movable part and closer to the mechanical mating member than the first reset plate. The first elastic member is installed between the first reset plate and the second reset plate. During the process of the movable part switching from the closed position to the open position, the movable part drives the first reset plate to move toward the second reset plate. During the process of the mechanical mating member switching from the first mating position to the second mating position, the mechanical mating member can drive the second reset plate to move toward the first reset plate.

[0006] In an exemplary embodiment of the present invention, the elastic reset member further includes a positioning member, a first limiting member, and a second limiting member; the positioning member passes through the first reset pressure plate and the second reset pressure plate; the first limiting member is fixedly connected to one end of the positioning member and is disposed opposite to the first reset pressure plate, and is located on the side of the first reset pressure plate away from the second reset pressure plate; the second limiting member is fixedly connected to the other end of the positioning member and is disposed opposite to the second reset pressure plate, and is located on the side of the second reset pressure plate away from the first reset pressure plate.

[0007] In an exemplary embodiment of the present invention, the first elastic element is a disc spring, which is sleeved on the positioning element.

[0008] In an exemplary embodiment of the present invention, the elastic reset member further includes a guide telescopic rod, the guide telescopic rod including a connecting rod and a movable rod, the movable rod being sleeved on the connecting rod and capable of sliding on the connecting rod; one end of the connecting rod being connected to the housing of the trip unit; one end of the movable rod passing through the first reset pressure plate and the second reset pressure plate, and capable of moving in the same direction as the movable part.

[0009] In an exemplary embodiment of the present invention, the mechanical mating component includes a fixing component, a rotating component, a connecting shaft, and a second elastic component. The connecting shaft is fixedly connected to the fixing component, and the rotating component is movably connected to the connecting shaft. The rotating component has a first mating position and a second mating position. The second elastic component is connected to the rotating component and the connecting shaft and is used for the rotating component to switch from the second mating position to the first mating position. During the process of the rotating component switching from the first mating position to the second mating position, the rotating component drives the second reset pressure plate to move towards the first reset pressure plate.

[0010] In an exemplary embodiment of the present invention, the rotating component includes a reset shaft, a reset block, a pin, and a third elastic element; wherein, both the reset shaft and the reset block are provided with shaft holes that mate with the pin, the second elastic element is connected to the reset shaft and the connecting shaft, the reset shaft has a first mating position and a second mating position; the reset block and the reset shaft are rotatably connected through the pin engaging with the shaft hole, and the reset block is located at the end of the reset shaft away from the second reset pressure plate;

[0011] The third elastic element is sleeved on the pin shaft, one end of the third elastic element is connected to the reset shaft, and the other end of the third elastic element is connected to the reset block; the reset block can drive the reset shaft to move from the first mating position to the second mating position during the opening process of the movable part; the second elastic element can drive the reset shaft to move from the second mating position to the first mating position during the switching process of the movable part from the closing position to the opening position.

[0012] In an exemplary embodiment of the present invention, both the reset shaft and the reset block rotate about the connecting shaft as the rotation center; and / or, both the second elastic element and the third elastic element are torsion springs.

[0013] In an exemplary embodiment of the present invention, the mechanical mating component further includes a positioning shaft, which is connected to the fixing component; when the reset rotating shaft is located in the first mating position, the reset rotating shaft abuts against the positioning shaft.

[0014] In an exemplary embodiment of the present invention, the spring-loaded mechanism further includes a tripping transmission component, and the circuit breaker further includes a driving component, wherein the tripping transmission component is convexly connected to the driving component; wherein, during the process of the movable part switching from the closed position to the open position, the movable part drives the tripping transmission component to move, so as to drive the driving component to drive the mechanical mating component to move from the first mating position to the second mating position.

[0015] The proposed solution has the following beneficial effects:

[0016] In this embodiment of the invention, during the movement of the movable part of the trip unit from the closed position to the open position, it drives the mechanically engaged component to move from the first engaged position to the second engaged position. Simultaneously, the mechanically engaged component and the movable part jointly drive the elastic reset component to undergo elastic deformation. When the movable part reaches the open position, the force exerted by the trip unit on the movable part disappears, and therefore the movable part no longer drives the mechanically engaged component. At this time, the elastic reset component recovers its elastic deformation, driving the movable part to move from the open position to the closed position. Correspondingly, the mechanically engaged component automatically returns from the second engaged position to the first engaged position, thus completing the automatic reset function of the movable part of the trip unit.

[0017] In summary, the circuit breaker of the present invention resets the moving part by mechanical reset when it trips, instead of resetting the moving part by electromagnetic coil, thus avoiding the problem that the moving part of the trip unit cannot complete the reset function due to the coil burning out. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 A top view of the mechanical reset and closing state of the trip unit of the circuit breaker according to an embodiment of the present invention is shown.

[0020] Figure 2 It shows Figure 1 An enlarged structural diagram of the mechanical fitting at point A in the circuit breaker.

[0021] Figure 3 A front view of the mechanical reset and closing state of the trip unit of the circuit breaker according to an embodiment of the present invention is shown.

[0022] Figure 4 A top view of the mechanical reset and tripping process of the circuit breaker trip unit according to an embodiment of the present invention is shown.

[0023] Figure 5 It shows Figure 4 An enlarged structural diagram of the mechanical fitting at point B in the circuit breaker.

[0024] Figure 6 The diagram shows a front view of the mechanical reset and tripping process of the circuit breaker's trip unit according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Trip unit; 11. Moving part; 20. Transmission assembly; 21. Opening transmission component; 211. Opening trip plate; 212. Opening half shaft; 22. Drive component; 221. Main connecting rod; 222. Drive pull rod; 30. Elastic reset component; 31. First reset pressure plate; 32. Second reset pressure plate; 33. First elastic component; 34. First locking nut; 35. Second locking nut; 36. Positioning component; 37. Guide telescopic rod; 40. Mechanical mating component; 41. Fixing component; 42. Rotating component; 421. Reset rotating shaft; 422. Reset block; 423. Pin shaft; 424. Third elastic component; 43. Connecting shaft; 44. Second elastic component; 45. Positioning shaft. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0029] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0030] Please refer to Figures 1 to 6 As shown, an embodiment of the present invention provides a circuit breaker. The circuit breaker includes a contact system, an arc extinguishing system, an operating mechanism, a trip unit 10, and a housing, among other structures.

[0031] It should be understood that the function of a circuit breaker is to disconnect and connect load circuits, as well as to disconnect faulty circuits, to prevent accidents from escalating and to ensure safe operation. Specifically, in the event of a short circuit, the trip unit 10 actuates the operating mechanism, causing the switch to trip instantaneously.

[0032] In some embodiments, such as Figure 3 and Figure 6As shown, the trip unit 10 includes a main body and a movable part 11. The movable part 11 is movable relative to the main body and has an open position and a closed position. When the trip unit 10 switches from the closed position to the open position, the circuit breaker is in the open position to ensure safe operation.

[0033] For example, the trip unit 10 is a permanent magnet trip unit. The movable part 11 is a moving iron core that can move relative to the trip unit 10.

[0034] For example, when the moving part 11 switches from the open position to the closed position, the moving part 11 is attracted by the magnet in the trip unit 10 and remains stationary. When the trip unit 10 receives the open command, the trip unit 10 trips, and then drives the moving part 11 to switch from the closed position to the open position.

[0035] In some embodiments, the operating mechanism is a spring-loaded mechanism. The spring-loaded mechanism includes a spring-loaded reset member 30 and a mechanically mating member 40.

[0036] For example, the resilient reset member 30 is mounted on the movable part 11 to switch the movable part 11 from the open position to the closed position.

[0037] For example, the mechanical mating part 40 has a first mating position and a second mating position. The first mating position is the initial position of the mechanical mating part 40.

[0038] It should be understood that, in combination Figure 1 , Figure 2 and Figure 4 As shown, the mechanical mating part 40 can abut against the movable part 11 during the opening process of the movable part 11, and move from the first mating position to the second mating position under the push of the movable part 11.

[0039] In this embodiment, during the movement of the movable part 11 of the trip unit 10 from the closed position to the open position, it drives the mechanical mating part 40 to move from the first mating position to the second mating position. Simultaneously, the mechanical mating part 40 and the movable part 11 jointly drive the elastic reset member 30 to undergo elastic deformation. When the movable part 11 reaches the open position, the force exerted by the trip unit 10 on the movable part 11 disappears, and therefore the movable part 11 no longer drives the mechanical mating part 40. At this time, the elastic reset member 30 restores its elastic deformation, driving the movable part 11 from the open position to the closed position. Correspondingly, the mechanical mating part 40 automatically returns from the second mating position to the first mating position, thus completing the automatic reset function of the movable part 11 of the trip unit 10.

[0040] In summary, the circuit breaker of the present invention resets the movable part 11 by mechanical reset when it trips, instead of resetting the movable part 11 by electromagnetic coil, thus avoiding the problem that the movable part 11 of the trip unit 10 cannot complete the reset function due to the coil burning out.

[0041] In some embodiments, the elastic reset member 30 includes a first reset plate 31, a second reset plate 32, and a first elastic member 33. The first reset plate 31 is fixedly connected to one end of the movable part 11, the second reset plate 32 is slidably connected to one end of the movable part 11, and is closer to the mechanical mating member 40 than the first reset plate 31, and the first elastic member 33 is installed between the first reset plate 31 and the second reset plate 32.

[0042] For example, such as Figure 1 As shown, the elastic reset member 30 also includes a first locking nut 34 and a second locking nut 35. The first locking nut 34 and the second locking nut 35 are connected to the movable part 11 and are located on both sides of the first reset pressure plate 31 to fix the first reset pressure plate 31 to the movable part 11.

[0043] It should be understood that when the movable part 11 moves, the first reset plate 31 will also move synchronously with the movable part 11, so that when the movable part 11 switches from the closed position to the open position, the movable part 11 can drive the first reset plate 31 to move toward the second reset plate 32, thereby cooperating with the second reset plate 32 to compress the first elastic member 33.

[0044] Furthermore, during the process of switching from the first mating position to the second mating position, the mechanical mating component 40 can drive the second reset pressure plate 32 to move toward the first reset pressure plate 31, thereby cooperating with the first reset pressure plate 31 to compress the first elastic member 33.

[0045] In some embodiments, the elastic reset member 30 further includes a positioning member 36, a first limiting member (not shown) and a second limiting member (not shown); the positioning member 36 passes through the first reset pressure plate 31 and the second reset pressure plate 32; the first limiting member is fixedly connected to one end of the positioning member 36 and is disposed opposite to the first reset pressure plate 31, and is located on the side of the first reset pressure plate 31 away from the second reset pressure plate 32; the second limiting member is fixedly connected to the other end of the positioning member 36 and is disposed opposite to the second reset pressure plate 32, and is located on the side of the second reset pressure plate 32 away from the first reset pressure plate 31.

[0046] For example, the positioning element 36 is a positioning pin, and the first limiting element and the second limiting element are nuts that mate with the positioning pin, or protrusions fixedly installed at both ends of the positioning pin. After the positioning pin passes through the first reset plate 31, the first elastic element 33 and the second reset plate 32 in sequence, the first limiting element and the second limiting element are used to fix the two ends of the positioning pin, so as to restrict the first reset plate 31 and the second reset plate 32 to move between the first limiting element and the second limiting element.

[0047] It should be understood that when the first elastic member 33 recovers from the state of elastic compression deformation, the first elastic member 33 will push the first reset plate 31 to move. Since one side of the first reset plate 31 abuts against the first limiting member and the second reset plate 32 abuts against the second limiting member, the movement of the first reset plate 31 will drive the first limiting member, the second limiting member and the second reset plate 32 to move together.

[0048] In some embodiments, the first elastic member 33 is a disc spring, which is sleeved on the positioning member 36.

[0049] It should be understood that a disc spring (belleville spring) is also known as a Belleville spring washer. Its shape is a conical disc. Compared to traditional springs, its advantages include higher load capacity, shorter stroke, smaller space requirement, ease of combination and use, easy maintenance and replacement, high economy and safety, and suitability for precision heavy machinery with limited space and high loads.

[0050] In some embodiments, such as Figure 1 and Figure 4 As shown, the elastic reset member 30 also includes a guide telescopic rod 37, which includes a connecting rod and a movable rod. The movable rod is sleeved on the connecting rod and can slide on the connecting rod. One end of the connecting rod is connected to the housing of the trip unit 10. One end of the movable rod passes through the first reset pressure plate 31 and the second reset pressure plate 32 and can move in the same direction as the movable part 11.

[0051] For example, the axes of the movable rod, the positioning element 36, and the movable part 11 are parallel to each other.

[0052] For example, both the first reset plate 31 and the second reset plate 32 are rectangular plates. There are two positioning members 36, which pass through the first reset plate 31 and the second reset plate 32 in sequence, and each positioning member 36 is fitted with a disc spring. The movable rod, the two positioning members 36, and the movable part 11 are evenly distributed on the first reset plate 31 and the second reset plate 32, and together they form a rectangular area.

[0053] It should be understood that the guide telescopic rod 37 enables the movable part 11 to switch precisely between the closed and open positions.

[0054] In some embodiments, the mechanical mating component 40 includes a fixing component 41, a rotating component 42, a connecting shaft 43, and a second elastic component 44. The connecting shaft 43 is fixedly connected to the fixing component 41, and the rotating component 42 is movably connected to the connecting shaft 43. The rotating component 42 has a first mating position and a second mating position. The second elastic component 44 is connected to the rotating component 42 and the connecting shaft 43, and is used for the rotating component 42 to switch from the second mating position to the first mating position.

[0055] For example, the fastener 41 is a mounting block installed on the circuit breaker chassis, and the connecting shaft 43 can be installed on the mounting block by means of threads and threaded holes. The axis of the connecting shaft 43 is perpendicular to the axis of the movable part 11.

[0056] For example, the connecting shaft 43 passes through the middle part of the rotating member 42, and the rotating member 42 rotates along the circumferential direction of the connecting shaft 43, that is, the axis of the rotating member 42 is perpendicular to the axis of the connecting shaft 43.

[0057] It should be understood that, as Figure 1 As shown, when the rotating component 42 is in the first mating position, the rotating component 42 is not in contact with the second reset pressure plate 32; Figure 4 As shown, during the process of the rotating member 42 switching from the first mating position to the second mating position, the rotating member 42 comes into contact with the second reset pressure plate 32 and begins to push the second reset pressure plate 32 toward the first reset pressure plate 31.

[0058] When the rotating member 42 is in the second engagement position, it pushes the second reset plate 32 to its minimum distance from the first reset plate 31. Simultaneously, the movable part 11 reaches the open position and stops moving away from the closed position; the movable part 11 also ceases to exert force on the rotating member 42. At this point, the first elastic member 33 recovers its deformation, releases energy, and pushes the first reset plate 31, the second reset plate 32, and the movable part 11 together until the movable part 11 returns to the closed position. Then, the trip unit 10 holds the movable part 11 in place until the trip unit 10 receives another open command, and then drives the movable part 11.

[0059] During the process of the movable part 11 returning to the closed position, the second reset plate 32 moves away from the rotating part 42 along with the movable part 11. Therefore, the rotating part 42 no longer abuts against the second reset plate 32 and is not subjected to the force of the movable part 11. As a result, the rotating part 42 automatically returns from the second engagement position to the first engagement position.

[0060] In some embodiments, such as Figure 1 and Figure 2As shown, the rotating component 42 includes a reset shaft 421, a reset block 422, a pin 423, and a third elastic element 424. The second elastic element 44 is connected to the reset shaft 421 and the connecting shaft 43. The reset shaft 421 has a first mating position and a second mating position. Both the reset shaft 421 and the reset block 422 have shaft holes that mate with the pin 423. The reset shaft 421 and the reset block 422 are rotatably connected through the pin 423 engaging with the shaft holes. The third elastic element 424 is sleeved on the pin 423. One end of the third elastic element 424 is connected to the reset shaft 421, and the other end is connected to the reset block 422. The third elastic element 424 can limit the rotation angle of the reset block 422.

[0061] For example, the axes of the reset shaft 421 and the reset block 422 are both perpendicular to the axis of the connecting shaft 43, and the reset block 422 is located at the end of the reset shaft 421 away from the second reset pressure plate 32. The reset shaft 421 and the reset block 422 both rotate around the circumferential direction of the connecting shaft 43.

[0062] For example, while the reset block 422 rotates to the lower right with the connecting shaft 43 as the fulcrum, the reset rotating shaft 421 also rotates to the upper left with the connecting shaft 43 as the fulcrum, thereby pushing the second reset pressure plate 32 to the left (towards the first reset pressure plate 31).

[0063] It should be understood that the reset block 422 can drive the reset shaft 421 from the first engagement position to the second engagement position during the opening process of the movable part 11; the second elastic member 44 can drive the reset shaft 421 from the second engagement position to the first engagement position during the switching process of the movable part 11 from the closing position to the opening position.

[0064] When the reset shaft 421 is in the first mating position, the reset shaft 421 and the reset block 422 form an approximately "V"-shaped crank arm, and the angle between the reset shaft 421 and the reset block 422 is greater than 90°. When the reset shaft 421 is in the second mating position, the angle between the reset shaft 421 and the reset block 422 gradually increases, and the reset shaft 421 pushes the second reset pressure plate 32 towards the trip unit 10 to the maximum distance (i.e., when the distance between the second reset pressure plate 32 and the first reset pressure plate 31 is the minimum). During this process, the reset block 422 can rotate relative to the reset shaft 421 with the reset shaft 421 as the fulcrum under the action of the third elastic element 424, preventing the reset shaft 421 and the reset block 422 from continuing to rotate together, causing the end of the reset shaft 421 away from the reset block 422 to tilt too high; when the reset block 422 is no longer driven by external force, the reset block 422 returns to its initial position by restoring its elastic deformation through the third elastic element 424.

[0065] In some embodiments, both the second elastic element 44 and the third elastic element 424 are torsion springs.

[0066] For example, after the second elastic element 44 is installed on the connecting shaft 43, it is clamped in the middle by the reset shaft 421 and the fixing element 41, so that it will not move in the axial direction.

[0067] It should be understood that when the reset shaft 421 rotates from the first mating position to the second mating position under the drive of the movable part 11, the first elastic element 33 of the mechanical mating part 40 undergoes elastic deformation. When the reset shaft 421 is not driven by the movable part 11, the first elastic element 33 of the mechanical mating part 40 recovers its elastic deformation, causing the rotating part 42 to automatically switch from the second mating position to the first mating position.

[0068] In some embodiments, combined with Figure 3 and Figure 6 As shown, the mechanical mating part 40 also includes a positioning shaft 45, which is connected to the fixing part 41 and located to the lower left of the connecting shaft 43. The positioning shaft 45 is tangent to the reset rotating shaft 421 and limits the reset rotating shaft 421 so that when the movable part 11 is in the closed position, the position of the reset rotating shaft 421 is relatively fixed. That is, when the reset rotating shaft 421 is in the first mating position, the reset rotating shaft 421 abuts against the positioning shaft 45.

[0069] In some embodiments, the fastener 41 is fixedly connected to the circuit breaker housing by a screw and a nut.

[0070] In some embodiments, the circuit breaker further includes a drive assembly 20, which is capable of moving during the transition of the movable part 11 from the closed position to the open position.

[0071] In some embodiments, such as Figures 1 to 6 As shown, the transmission assembly 20 includes a tripping transmission component 21 and a driving component 22. The tripping transmission component 21 is part of the spring-operated mechanism, and the driving component 22 is an essential part of the circuit breaker.

[0072] For example, the tripping drive component 21 is connected to the drive component 22 in a transmission connection.

[0073] For example, such as Figure 1 and Figure 3 As shown, the tripping transmission component 21 includes a tripping release plate 211 and a tripping half-shaft 212. The tripping release plate 211 is sleeved on the tripping half-shaft 212, and the two are coaxially arranged. The driving component 22 includes a main connecting rod 221 and a driving pull rod 222. The main connecting rod 221 is connected to the driving pull rod 222.

[0074] It should be understood that during the process of switching the moving part 11 from the closed position to the open position, the moving part 11 drives the open transmission component 21 to move, so as to drive the driving component 22 to drive the mechanical mating component 40 to move from the first mating position to the second mating position.

[0075] Example, combination Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the moving part 11 moves to the right, pushing the trip plate 211 to move. The trip plate 211 drives the trip half shaft 212 to rotate, thereby driving the main connecting rod 221 and the drive rod 222 to move to the right. When the main connecting rod 221 moves to the right and hits the reset block 422, the reset block 422 rotates to the lower right with the connecting shaft 43 as the fulcrum, while the reset shaft 421 also rotates to the upper left with the connecting shaft 43 as the fulcrum, thereby pushing the second reset pressure plate 32 to the left.

[0076] Example, combination Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, when the main connecting rod 221 continues to move to the right until it passes the reset block 422 (i.e., the main connecting rod 221 no longer abuts against the reset block 422), the reset shaft 421 also pushes the second reset pressure plate 32 to the left to its maximum distance. The first elastic element 33 restores its elastic deformation, pushing the first reset pressure plate 31, the second reset pressure plate 32, and the movable part 11 to move away from the reset shaft 421 until the movable part 11 returns to the circuit breaker closing position. At this point, the trip unit 10 keeps the movable part 11 stationary in this position. Without the main connecting rod 221 pushing the reset block 422 to rotate, the reset shaft 421 rotates back to the first engagement position limited by the positioning shaft 45. This achieves the mechanical reset function of the movable part 11 of the trip unit 10 while the circuit breaker is opening, enabling mechanical reset without the need for an electromagnetic coil.

[0077] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application.

[0079] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0080] Although embodiments of this application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of the patent coverage of this application.

Claims

1. A circuit breaker, characterized in that, include: A trip unit, comprising a main body and a movable part, wherein the movable part is capable of moving relative to the main body to switch between a closed position and an open position; A spring-operated mechanism includes an elastic reset component and a mechanical mating component. The elastic reset component includes a first reset pressure plate, a second reset pressure plate, and a first elastic element. The first reset pressure plate is fixedly connected to one end of the movable part, and the second reset pressure plate is slidably connected to one end of the movable part and closer to the mechanical mating component than the first reset pressure plate. The first elastic element is installed between the first reset pressure plate and the second reset pressure plate. The mechanical mating component includes a fixed component, a rotating component, a connecting shaft, and a second elastic element. The connecting shaft is fixedly connected to the fixed component, and the rotating component is movably connected to the connecting shaft. The rotating component has a first mating position and a second mating position. The second elastic element is connected to the rotating component and the connecting shaft and is used for switching the rotating component from the second mating position to the first mating position. The mechanical mating component can abut against the movable part during the opening process of the movable part, and move from the first mating position to the second mating position under the push of the movable part; The elastic reset member can abut against the mechanical mating member during the movement of the mechanical mating member from the first mating position to the second mating position, and undergo elastic deformation under the push of the mechanical mating member; When the mechanical mating component moves to the second mating position, the thrust between it and the movable part disappears, and the elastic reset component can restore its deformation when the mechanical mating component moves to the second mating position, and drive the movable part to move from the open position to the closed position; The elastic reset member is capable of resetting from the second mating position to the first mating position during the process of the movable part moving from the open position to the closed position; During the process of switching the movable part from the closed position to the open position, the movable part drives the first reset plate to move toward the second reset plate; During the process of switching from the first mating position to the second mating position, the mechanical mating component can drive the second reset plate to move toward the first reset plate; During the process of the rotating component switching from the first mating position to the second mating position, the rotating component drives the second reset pressure plate to move toward the first reset pressure plate.

2. The circuit breaker according to claim 1, characterized in that, The elastic reset component further includes a positioning component, a first limiting component, and a second limiting component; The positioning element passes through the first reset plate and the second reset plate; The first limiting member is fixedly connected to one end of the positioning member and is disposed opposite to the first reset plate, and is located on the side of the first reset plate away from the second reset plate; The second limiting member is fixedly connected to the other end of the positioning member and is disposed opposite to the second reset pressure plate, and is located on the side of the second reset pressure plate away from the first reset pressure plate.

3. The circuit breaker according to claim 2, characterized in that, The first elastic element is a disc spring, which is sleeved on the positioning element.

4. The circuit breaker according to claim 2, characterized in that, The elastic reset component further includes a guide telescopic rod, which includes a connecting rod and a movable rod. The movable rod is sleeved on the connecting rod and can slide on the connecting rod. One end of the connecting rod is connected to the housing of the trip unit; One end of the movable rod passes through the first reset pressure plate and the second reset pressure plate, and can move in the same direction as the movable part.

5. The circuit breaker according to claim 1, characterized in that, The rotating component includes a reset shaft, a reset block, a pin, and a third elastic element; wherein... The second elastic element is connected to the reset shaft and the connecting shaft, and the reset shaft has a first mating position and a second mating position; Both the reset shaft and the reset block are provided with shaft holes that cooperate with the pin. The reset block and the reset shaft are rotatably connected by the pin cooperating with the shaft holes. The reset block is located at the end of the reset shaft away from the second reset pressure plate. The third elastic element is sleeved on the pin, one end of the third elastic element is connected to the reset shaft, and the other end of the third elastic element is connected to the reset block; The reset block can drive the reset shaft to move from the first mating position to the second mating position during the opening process of the movable part; The second elastic element can drive the reset shaft to move from the second mating position to the first mating position during the process of the movable part switching from the closed position to the open position.

6. The circuit breaker according to claim 5, characterized in that, Both the reset shaft and the reset block rotate around the connecting shaft as the center of rotation; and / or Both the second elastic element and the third elastic element are torsion springs.

7. The circuit breaker according to claim 5, characterized in that, The mechanical mating component further includes a positioning shaft, which is connected to the fixing component; When the reset shaft is in the first mating position, the reset shaft abuts against the positioning shaft.

8. The circuit breaker according to claim 1, characterized in that, The spring-loaded operating mechanism further includes a tripping transmission component, and the circuit breaker further includes a driving component, wherein the tripping transmission component is drivingly connected to the driving component; wherein... During the process of switching the movable part from the closed position to the open position, the movable part drives the open transmission component to move, so as to drive the mechanical mating component to move from the first mating position to the second mating position.

Images