Shunt release and splicing structure of shunt release and circuit breaker

Abstract

The utility model provides a shunt release and a splicing structure of the shunt release and a circuit breaker, and relates to the technical field of electrical equipment, and the shunt release comprises a housing, an operating mechanism, a movable contact piece and a static contact piece. The operating mechanism comprises a handle, a connecting rod, a jump pin, a lock catch and a contact support, the handle is rotationally connected to the shell, the contact support is rotationally connected to the shell, the lock catch is rotationally connected to the contact support, the jump pin is rotationally connected to the contact support, and the jump pin is in lap joint with the lock catch; the lock catch is provided with a clamping groove, and a part of the contact support is located in the clamping groove. The other end of the connecting rod is rotationally connected with the handle; the moving contact is connected to the contact support; the static contact is connected to the shell; the handle can rotate between a first position and a second position so as to drive the movable contact piece to be in contact with or separated from the static contact piece. According to the shunt release, the contact support is directly connected to the shell through the first connecting shaft, a supporting piece is omitted, the number of parts is reduced, and the cost of the shunt release is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electrical equipment, and in particular, to a shunt trip and its splicing structure with a circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time.

[0003] The shunt trip is used in splicing with a circuit breaker and is an accessory for remotely controlling the closing and opening of the circuit breaker. The closing and opening modules of the shunt trip are linked with the closing and opening modules of the circuit breaker, so that controlling the closing of the shunt trip can control the closing of the circuit breaker, and controlling the opening of the shunt trip can control the opening of the circuit breaker. When the trip module in the shunt trip is working normally, its coil is de-energized. When it is necessary to remotely control the opening of the circuit breaker, the start button is pressed remotely to energize the coil, and then the ejector rod of the trip module pops out to push the shunt trip to open.

[0004] The existing operating mechanism of the shunt trip includes a handle, a connecting rod, a locking catch, a tripping catch, a contact support, a support member, etc. The support member is rotatably installed in the housing, and the contact support, the locking catch, and the tripping catch are all installed on the support member.

[0005] The existing shunt trip has a large number of parts, and the production and assembly of the parts are relatively complex, resulting in difficulty in improving the production efficiency and output of the shunt trip. Summary of the Utility Model

[0006] In view of the above problems, the embodiments of the present application provide a shunt trip and its splicing structure with a circuit breaker, which can improve the production efficiency and output of the shunt trip by reducing the parts of the shunt trip.

[0007] According to one aspect of the embodiments of the present application, a shunt trip is provided, including: a housing, an operating mechanism, a moving contact and a stationary contact. The operating mechanism includes a handle, a connecting rod, a tripping latch, a locking latch and a contact support. The handle is rotatably connected to the housing, and a part of the handle extends out of the housing; the contact support is provided with a first connecting shaft, a second connecting shaft and a third connecting shaft. The contact support is rotatably connected to the housing through the first connecting shaft, the locking latch is rotatably connected to the contact support through the second connecting shaft, the tripping latch is rotatably connected to the contact support through the third connecting shaft, and the tripping latch and the locking latch are lapped; a slot is provided on the locking latch, and a part of the contact support is located in the slot; both ends of the connecting rod are bent, one end of which is rotatably connected to the tripping latch and the other end is rotatably connected to the handle; the moving contact is connected to the contact support; the stationary contact is connected to the housing; the handle can rotate between a first position and a second position. When the handle rotates from the first position to the second position, the handle drives the tripping latch, the contact support and the locking latch to rotate through the connecting rod, so that the moving contact contacts the stationary contact; when the handle rotates from the second position to the first position, the handle drives the tripping latch, the contact support and the locking latch to rotate in the opposite direction through the connecting rod, so that the moving contact is separated from the stationary contact.

[0008] By adopting the above solution, the contact support is directly connected to the housing through the first connecting shaft, eliminating the support member, reducing the number of parts, and lowering the cost of the shunt trip. When the handle is in the second position, the moving contact contacts the stationary contact. Therefore, the shunt trip is in the closing state. When the handle is in the first position, the moving contact is separated from the stationary contact, and the shunt trip is in the opening state. The rotational connection between the locking latch and the contact support can be achieved through the second connecting shaft, and the rotational connection between the tripping latch and the contact support can be achieved through the third connecting shaft. Through the lapping of the locking latch and the tripping latch, the limitation between the locking latch and the tripping latch can be realized. Thus, when the handle rotates between the first position and the second position, the tripping latch can be driven to rotate through the connecting rod, and then the contact support can be driven to rotate by pulling the tripping latch. Since a slot is provided on the locking latch and a part of the contact support is located in the slot, when the contact support rotates, the locking latch can be driven to rotate by abutting against the side wall of the slot. It can be seen that when the handle rotates, the contact support can be driven to rotate, so that the contact support drives the moving contact to contact or move away from the stationary contact, and at the same time, the locking latch and the tripping latch can be driven to lap when the handle is in the first position and the second position, so that the locking latch and the tripping latch limit the position of the contact support, and further limit the position of the moving contact, preventing the moving contact from actuating when not manually controlled.

[0009] In some embodiments, the operating mechanism further includes a reset member. A fourth connecting shaft is provided on the contact support. The reset member is rotatably connected to the fourth connecting shaft, and the reset member is connected to the latch for synchronously rotating relative to the contact support with the latch; a flexible arm is provided on the reset member, and an abutting platform is provided on the housing. When the handle is in the first position, the flexible arm abuts against the abutting platform, and the flexible arm has an elastic deformation under the pushing of the abutting platform, so that the flexible arm drives the latch to closely overlap with the trip latch through the reset member.

[0010] By adopting the above solution, the reset member is rotatably connected to the fourth connecting shaft on the contact support, so the reset member can rotate relative to the contact support. In addition, the reset member is connected to the latch, so the reset member can rotate synchronously with the latch. A flexible arm is provided on the reset member, and the flexible arm can generate an elastic deformation, so as to give a certain force to the reset member in the direction of restoring the deformation. When the handle is in the first position, the flexible arm generates an elastic deformation by abutting against the abutting platform, and the force in the direction of the flexible arm restoring the deformation acts on the reset member, which can drive the reset member and the latch to rotate together in the direction of the latch closely overlapping with the trip latch, so that the latch and the trip latch are closely overlapped, locking the position of the contact support, and further keeping the shunt trip in the open state to prevent the contact support from driving the moving contact member to act when not under manual control.

[0011] In some embodiments, the moving contact member includes a flexible reed and a moving silver point provided on the flexible reed. After the moving silver point contacts the static contact member, the flexible reed deforms so that there is a pre-pressure between the moving silver point and the static contact member.

[0012] By adopting the above solution, after the moving silver point contacts the static contact member, the flexible reed deforms so that there is a pre-pressure between the moving silver point and the static contact member, thereby making the contact between the moving silver point and the static contact member closer, which is beneficial to maintaining the stability of the shunt trip in the closed state.

[0013] In some embodiments, the connection mode between the flexible reed and the contact support is in-mold injection or snap connection.

[0014] By adopting the above solution, these two connection structures are easy to operate and have low costs, which is beneficial to improving the assembly efficiency of the shunt trip.

[0015] In some embodiments, the shunt trip further includes an indicating member and a release. An indicating hole is provided on the housing. The indicating member is slidably arranged on the side wall where the indicating hole is located, and the indicating member is arranged on one side of the trip latch; the release is provided with a triggering end, and the triggering end faces the latch. When the release is actuated, the triggering end pops out to drive the latch to rotate and disengage from the trip latch, and the latch drives the contact support to rotate to drive the moving contact member to separate from the static contact member, and the trip latch pushes the indicating member to slide towards the position directly opposite to the indicating hole.

[0016] By adopting the above solution, after the release drives the moving contact to separate from the static contact, the shunt release is in the tripped state. At this time, the trip latch can drive the indicating member to slide to a position directly opposite the indicating hole. Thus, a person can see the indicating member from outside the indicating hole and determine that the shunt release has tripped successfully through this signal.

[0017] In some embodiments, the indicating member includes an indicating plate and a protruding portion protruding from the inner side of the indicating plate; a first pushing portion is provided on the contact support, and a second pushing portion is provided on the trip latch. The first pushing portion is provided on the first side of the protruding portion, and the second pushing portion is provided on the second side of the protruding portion. When the indicating plate is disposed at a position directly opposite the indicating hole and the handle rotates to the second position, the first pushing portion pushes the protruding portion from the first side to cause the indicating plate to slide away from the indicating hole; when the release drives the lock to disengage from the trip latch, the second pushing portion pushes the protruding portion from the second side to cause the indicating plate to slide to a position directly opposite the indicating hole.

[0018] By adopting the above solution, the movement of the indicating member to a position directly opposite the indicating hole is achieved by the second pushing portion pushing the protruding portion from the second side, and the movement of the indicating member away from the position directly opposite the indicating hole is achieved by the first pushing portion pushing the protruding portion from the first side. Through the above position settings of the protruding portion, the first pushing portion, and the second pushing portion, the indicating member can be in a position directly opposite the indicating hole when the shunt release trips, and leave the position directly opposite the indicating hole when the shunt release is re-closed after tripping, without affecting the judgment of the tripping state of the shunt release by the person.

[0019] In some embodiments, a linkage rod is provided on the handle. The linkage rod extends toward one side in the thickness direction of the housing. The linkage rod is used to connect with the driving handle of the circuit breaker so that the handle and the driving handle rotate synchronously.

[0020] By providing the linkage rod, when the shunt release is spliced with the circuit breaker, the handle and the driving handle can rotate synchronously through inserting the linkage rod on the driving handle of the circuit breaker or other connection methods, and the opening and closing of the circuit breaker and the shunt release can be realized synchronously.

[0021] In some embodiments, the shunt release further includes two terminal blocks. The two terminal blocks are respectively located on opposite sides of the housing. The terminal block includes a terminal box and a terminal screw connected to the terminal box. The model of the terminal screw is larger than M3.5.

[0022] By adopting the above solution, compared with the related art in which two terminal blocks are located on the same side of the housing, resulting in limited sizes of the terminal screws, in this application, the two terminal blocks are respectively located on both sides of the housing. Therefore, the two terminal blocks do not affect each other, and within the size range of the housing, the sizes of the terminal blocks can be made as large as possible. Thus, a terminal block with reliable wiring formed by combining a terminal box and a terminal screw can be adopted. Moreover, the size of the terminal screw is also larger, and a terminal screw with a model larger than M3.5 is used. The tightening torque that the terminal screw can withstand is larger, reducing the probability of the terminal block cracking and being damaged during use.

[0023] On the other hand according to the embodiment of the present application, a splicing structure of a shunt trip and a circuit breaker is provided, including a circuit breaker and the shunt trip in any of the above embodiments. The circuit breaker includes a first connecting rod, a first locking latch, and a first tripping latch. The first connecting rod is the same as the connecting rod, the first locking latch is the same as the locking latch, and the first tripping latch is the same as the tripping latch.

[0024] By adopting the above solution, the circuit breaker and the shunt trip are spliced and used. Through the shunt trip, remote control of the circuit breaker is achieved, increasing the applicable scenarios of the circuit breaker. The connecting rod, locking latch, and tripping latch in the shunt trip are also used in the circuit breaker as the first connecting rod, first locking latch, and first tripping latch, respectively, realizing the generalization of parts and reducing the design and manufacturing costs of parts.

[0025] In the embodiment of the present application, by directly connecting the contact support to the housing of the shunt trip, the support member is omitted, reducing the number of parts and the cost of the shunt trip. Through the cooperation of the contact support with the locking latch, tripping latch, connecting rod, and handle, on the basis of reducing parts in the shunt trip, the shunt trip can still achieve opening and closing, and can achieve locking in the opening and closing states, preventing the moving contact member from actuating when not under manual control.

[0026] The above description is only an overview of the technical solution of the embodiment of the present application. In order to be able to understand the technical means of the embodiment of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the embodiment of the present application more obvious and understandable, the specific implementation manners of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiment of the present application, the drawings required for description in the embodiment will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0028] Figure 1Schematic diagram of the external structure of a shunt trip provided by an embodiment of the present application.

[0029] Figure 2 Schematic diagram of the structure of a shunt trip provided by an embodiment of the present application in the open state.

[0030] Figure 3 Schematic diagram of the structure of a shunt trip provided by an embodiment of the present application in the closed state.

[0031] Figure 4 Schematic diagram of the mating state of the contact support, the latch, and the trip in the first perspective.

[0032] Figure 5 Schematic diagram of the mating state of the contact support, the latch, and the trip in the second perspective.

[0033] Figure 6 Partial schematic diagram of the housing in an embodiment of the present application.

[0034] Figure 7 Schematic diagram of the structure in which the reset member and the latch are integrally provided.

[0035] Figure 8 Schematic diagram of the clamping structure between the flexible reed and the contact support in an embodiment of the present application.

[0036] Figure 9 Explosion diagram of the flexible reed and the contact support.

[0037] Figure 10 Schematic diagram of the splicing structure of a shunt trip and a circuit breaker provided by an embodiment of the present application.

[0038] Figure 11 Internal structure schematic diagram of the circuit breaker in the splicing structure of a shunt trip and a circuit breaker provided by an embodiment of the present application.

[0039] Description of reference numerals: 1000, shunt trip; 1100, housing; 1110, indicating hole; 1200, operating mechanism; 1210, handle; 1220, connecting rod; 1230, trip latch; 1240, locking latch; 1241, card slot; 1250, contact support; 1251, first connecting shaft; 1252, second connecting shaft; 1253, third connecting shaft; 1254, fourth connecting shaft; 1255, mounting groove; 1256, through connection groove; 1257, limiting projection; 1260, reset member; 1270, flexible arm; 1280, opening spring; 1290, abutting platform; 1300, moving contact; 1310, flexible reed; 1311, limiting hole; 1320, moving silver point; 1400, static contact; 1500, indicating member; 1510, indicating board; 1520, protruding portion; 1530, first pushing portion; 1540, second pushing portion; 1600, release; 1610, triggering end; 1700, linkage rod; 1800, terminal; 1810, terminal box; 1820, connection screw; 1900, connection board; 2000, circuit breaker; 2100, first operating mechanism; 2110, first connecting rod; 2120, first trip latch; 2130, first locking latch; 2140, first reset member; 2150, first flexible arm; 2200, first release; A, first position; B, second position. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] The terms "including" and "having" and any variations thereof in the description, claims, and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the existence of a plurality.

[0043] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] The directional terms used in the following description are the directions shown in the figures, and do not limit the specific structure of the shunt trip of the present application and its splicing structure with the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0045] In addition, expressions indicating directions such as the X direction, Y direction, and Z direction for explaining the operations and structures of the components of the shunt trip of the present embodiment and its splicing structure with the circuit breaker are not absolute but relative. Although these indications are appropriate when the components of the shunt trip and its splicing structure with the circuit breaker are in the positions shown in the figures, when these positions change, these directions should have different interpretations to correspond to the changes.

[0046] In addition, the terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0047] In the description of the present application, unless otherwise specified, "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0048] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection can also be a detachable connection, such as a snap connection or a clamping connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. The "connection" or "coupling" of circuit structures can refer to not only a physical connection but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected. It can also be the communication inside two components; a signal connection can refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] An embodiment of the present application provides a shunt trip. Figure 1 FIG. 1 is a schematic diagram of the external structure of a shunt trip provided by an embodiment of the present application. Figure 2 FIG. 2 is a schematic diagram of the structure of a shunt trip provided by an embodiment of the present application in a tripped state. Figure 3 FIG. 3 is a schematic diagram of the structure of a shunt trip provided by an embodiment of the present application in a closed state. Figure 4 FIG. 4 is a schematic diagram of the cooperation state of the contact support, the latch, and the trip in the first perspective. Figure 5 FIG. 5 is a schematic diagram of the cooperation state of the contact support, the latch, and the trip in the second perspective. As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the shunt trip 1000 includes a housing 1100, an operating mechanism 1200, a moving contact member 1300, and a stationary contact member 1400.

[0050] As Figure 2 and Figure 3As shown in the figure, the operating mechanism 1200 includes a handle 1210, a connecting rod 1220, a trip latch 1230, a locking latch 1240, and a contact support 1250. The handle 1210 is rotatably connected to the housing 1100, and a part of the handle 1210 extends out of the housing 1100. The contact support 1250 is provided with a first connecting shaft 1251, a second connecting shaft 1252, and a third connecting shaft 1253. The contact support 1250 is rotatably connected to the housing 1100 through the first connecting shaft 1251. The locking latch 1240 is rotatably connected to the contact support 1250 through the second connecting shaft 1252. The trip latch 1230 is rotatably connected to the contact support 1250 through the third connecting shaft 1253, and the trip latch 1230 overlaps with the locking latch 1240. As Figure 5 shown in the figure, the locking latch 1240 is provided with a slot 1241, and a part of the contact support 1250 is located in the slot 1241. Both ends of the connecting rod 1220 are bent, one end of which is rotatably connected to the trip latch 1230, and the other end is rotatably connected to the handle 1210. The moving contact 1300 is connected to the contact support 1250; the static contact 1400 is connected to the housing 1100.

[0051] Please refer to Figure 2 and Figure 3 , the handle 1210 can rotate between a first position A and a second position B. When the handle 1210 rotates from the first position A to the second position B, the handle 1210 drives the trip latch 1230, the contact support 1250, and the locking latch 1240 to rotate through the connecting rod 1220, so that the moving contact 1300 contacts the static contact 1400; when the handle 1210 rotates from the second position B to the first position A, the handle 1210 drives the trip latch 1230, the contact support 1250, and the locking latch 1240 to rotate in the opposite direction through the connecting rod 1220, so that the moving contact 1300 separates from the static contact 1400.

[0052] When the handle 1210 is in the second position B, the moving contact 1300 contacts the static contact 1400, and the shunt trip 1000 is in the closing state. When the handle 1210 is in the first position A, the moving contact 1300 separates from the static contact 1400, and the shunt trip 1000 is in the opening state.

[0053] In the above structure, the handle 1210, the trip latch 1230, the locking latch 1240, and the contact support 1250 can all be insulating parts. For example, they are all made of plastic material, so as to prevent the above parts from conducting electricity when driving the moving contact 1300 to contact the static contact 1400, resulting in chaotic current flow in the housing 1100 and even causing potential safety hazards.

[0054] The first connecting shaft 1251, the second connecting shaft 1252, the third connecting shaft 1253 and the connecting rod 1220 are arranged non-coaxially with the rotating connecting shaft of the jump latch 1230. Thus, when the handle 1210 drives the connecting rod 1220 to move, the jump latch 1230 can be driven to rotate around the third connecting shaft 1253. At the same time, the jump latch 1230 can drive the contact support 1250 to rotate around the first connecting shaft 1251 through the third connecting shaft 1253, and the jump latch 1230 drives the latch 1240 to rotate around the second connecting shaft 1252 through the overlapping surface with the latch 1240. During this process, the movements of the connecting rod 1220, the jump latch 1230, the latch 1240 and the contact support 1250 are all compound movements.

[0055] The overlapping of the latch 1240 and the jump latch 1230 means that part of the surfaces of the latch 1240 and the jump latch 1230 overlap each other. The overlapping surface of the latch 1240 and the jump latch 1230 has a dead center of motion. At the dead center of motion, the latch 1240 and the jump latch 1230 are closely overlapped, and it is difficult for the two to continue rotating in the direction of closer overlapping. Thus, the contact support 1250 cannot continue to move in one direction either. When the latch 1240 and the jump latch 1230 are at the dead center of motion, the shunt release 1000 is in the closing state or the opening state. At this time, the latch 1240 and the jump latch 1230 can limit the position of the contact support 1250, and further limit the position of the moving contact 1300, preventing the moving contact 1300 from being actuated when not under manual control.

[0056] Wherein, the actuation of the moving contact 1300 means that the moving contact 1300 moves from the position in contact with the static contact 1400 in the direction away from the static contact 1400, and also means that the moving contact 1300 moves from the position separated from the static contact 1400 in the direction close to the static contact 1400.

[0057] As Figure 5 shown, the latch 1240 is provided with a slot 1241, and part of the contact support 1250 is located in the slot 1241. Wherein, the width of the slot 1241 can be greater than the width of the part of the contact support 1250 located in the slot 1241, so that the latch 1240 can move relative to the contact support 1250 within a certain range until the contact support 1250 contacts one side of the slot 1241, and then the latch 1240 and the contact support 1250 can move synchronously. This not only ensures that the latch 1240 and the contact support 1250 each have a certain degree of freedom of movement, but also enables the latch 1240 and the contact support 1250 to move synchronously under certain conditions, preventing the latch 1240 and the contact support 1250 from jamming when rotating non-coaxially.

[0058] In the description of the movement process of the above operating mechanism 1200, the reverse rotation of any component means that the rotation direction of the component is opposite to the rotation direction in the previous process. Exemplarily, during the closing process, the latch 1240 rotates clockwise. Then, during the opening process, the reverse rotation of the latch 1240 means that the latch 1240 rotates counterclockwise.

[0059] In the operating mechanism 1200 of the above-mentioned shunt trip 1000, the contact support 1250 is directly connected to the housing 1100 through the first connecting shaft 1251, eliminating the support member, reducing the number of parts, and reducing the cost of the shunt trip 1000.

[0060] Figure 6 It is a partial structural schematic diagram of the housing in the embodiment of the present application, as Figure 5 and Figure 6 shown. In some embodiments, the operating mechanism 1200 further includes a reset member 1260. A fourth connecting shaft 1254 is provided on the contact support 1250. The reset member 1260 is rotatably connected to the fourth connecting shaft 1254, and the reset member 1260 is connected to the latch 1240 for rotating relative to the contact support 1250 synchronously with the latch 1240. A flexible arm 1270 is provided on the reset member 1260, and an abutting platform 1290 is provided on the housing 1100. When the handle 1210 is in the first position A, the flexible arm 1270 abuts against the abutting platform 1290, and the flexible arm 1270 has an elastic deformation under the pushing of the abutting platform 1290, so that the flexible arm 1270 drives the latch 1240 to closely overlap with the trip latch 1230 through the reset member 1260.

[0061] The reset member 1260 and the latch 1240 can be integrally provided or separately provided.

[0062] Figure 7 It is a structural schematic diagram of the integral setting of the reset member 1260 and the latch 1240. As Figure 7 shown, when the reset member 1260 and the latch 1240 are integrally provided, the flexible arm 1270 can also be integrally provided with the reset member 1260 and the latch 1240, such as the three components being integrally cast.

[0063] In the case where the reset member 1260 and the latch 1240 are separately provided, the reset member 1260 and the latch 1240 are connected together through subsequent assembly.

[0064] It can be understood that the fourth connecting shaft 1254 and the second connecting shaft 1252 are coaxially arranged so that the reset member 1260 can rotate synchronously with the latch 1240.

[0065] Optionally, the reset member 1260 and the latch 1240 are respectively located on both sides of the contact support 1250. Among them, the latch 1240 and the trip latch 1230 are located on the same side of the contact support 1250. In this way, the flexible arm 1270 and the abutting platform 1290 are arranged without interfering with the latch 1240 and the trip latch 1230.

[0066] As Figure 6 shown, the abutting platform 1290 is a structure protruding from the inner wall of the housing 1100, and there are no specific requirements for its shape and size, as long as its position can make the flexible arm 1270 abut against the abutting platform 1290 and deform when the handle 1210 is in the second position B.

[0067] The flexible arm 1270 can be integrally formed with the reset member 1260. The flexible arm 1270 is made of a material with good elastic deformation. In order to further increase the maximum deformation amount of the flexible arm 1270 without damaging the flexible arm 1270, the flexible arm 1270 can be set as a bending member. When the flexible arm 1270 is stressed, each part of the bending can generate deformation, so that the total deformation amount of the flexible arm 1270 is larger, preventing the flexible arm 1270 from breaking due to local stress concentration.

[0068] The flexible arm 1270 can generate elastic deformation, so as to apply a certain force to the reset member 1260 in the direction of restoring deformation. When the handle 1210 is in the first position A, the flexible arm 1270 generates elastic deformation by abutting against the abutting platform 1290, and the force in the direction of the flexible arm 1270 restoring deformation acts on the reset member 1260, which can drive the reset member 1260 and the latch 1240 to rotate together in the direction of the latch 1240 and the trip latch 1230 being closely lapped, so that the latch 1240 and the trip latch 1230 are closely lapped, locking the position of the contact support 1250, and further keeping the shunt trip 1000 in the open state, preventing the contact support 1250 from driving the moving contact member 1300 to act when not under manual control.

[0069] Please continue to refer to Figure 5 , optionally, the operating mechanism 1200 further includes a closing spring 1280. An installation groove 1255 is provided on the contact support 1250. The closing spring 1280 is arranged in the installation groove 1255, and one end of the closing spring 1280 faces one groove wall of the installation groove 1255, and the other end of the closing spring 1280 faces the inner wall of the housing 1100 (not shown in the figure). When the handle 1210 rotates from the first position A to the second position B, one end of the closing spring 1280 abuts against the groove wall of the installation groove 1255, and the other end of the closing spring 1280 abuts against the inner wall of the housing 1100.

[0070] With the above arrangement of the opening spring 1280, when the handle 1210 is in the second position B, that is, when the shunt trip 1000 is closed, the opening spring 1280 has a force that pushes the contact support 1250 in the rotational direction during opening. So when a person rotates the handle 1210 towards the first position A, a slight force can make the handle 1210 rotate, achieving the opening of the shunt trip 1000.

[0071] As Figure 4 and Figure 5 shown, in some embodiments, the moving contact 1300 includes a flexible reed 1310 and a moving silver point 1320 provided on the flexible reed 1310. After the moving silver point 1320 contacts the static contact 1400, the flexible reed 1310 deforms so that there is a pre-pressure between the moving silver point 1320 and the static contact 1400.

[0072] By adopting the above solution, after the moving silver point 1320 contacts the static contact 1400, the contact support 1250 can rotate a certain angle with an over-travel. Under the pushing action of the static contact 1400, the flexible reed 1310 deforms, so that there is a pre-pressure between the moving silver point 1320 and the static contact 1400. This pre-pressure makes the contact between the moving silver point 1320 and the static contact 1400 closer, which is beneficial to maintaining the stability of the closed state of the shunt trip 1000.

[0073] In some embodiments, the connection mode between the flexible reed 1310 and the contact support 1250 is in-mold injection or snap connection.

[0074] The in-mold injection method is as follows: when the contact support 1250 is injection molded, the flexible reed 1310 is inserted into the injection material of the contact support 1250. After the material solidifies and forms, the flexible reed 1310 is fixed on the contact support 1250. Using this method to connect the flexible reed 1310 and the contact support 1250, the connection between the flexible reed 1310 and the contact support 1250 is relatively firm, not easy to fall off, and the cost is relatively low.

[0075] Figure 8 FIG. is a schematic diagram of the snap connection structure between the flexible reed and the contact support in the embodiment of the present application. Figure 9 FIG. is an exploded view of the flexible reed and the contact support. Please refer to Figure 8 and Figure 9 . The snap connection structure: a through slot 1256 is provided on the contact support 1250, and the flexible reed 1310 is inserted into the through slot 1256. Among them, in order to prevent the flexible reed 1310 from detaching from the contact support 1250, a limiting protrusion 1257 can be provided on the inner wall of the through slot 1256, and a limiting hole 1311 is provided on the flexible reed 1310. The limiting hole 1311 is sleeved on the limiting protrusion 1257 to achieve the snap connection between the flexible reed 1310 and the contact support 1250.

[0076] Both of the above connection structures have the beneficial effects of being easy to operate, having a relatively low cost, and being conducive to improving the assembly efficiency of the shunt trip 1000.

[0077] Please continue to refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the shunt trip 1000 further includes an indicating member 1500 and a trip 1600. An indicating hole 1110 is provided on the housing 1100. The indicating member 1500 is slidably disposed on the side wall where the indicating hole 1110 is located, and the indicating member 1500 is disposed on one side of the tripping latch 1230. The trip 1600 is provided with a triggering end 1610, and the triggering end 1610 faces the locking latch 1240. When the trip 1600 is actuated, the triggering end 1610 pops out to drive the locking latch 1240 to rotate and disengage from the tripping latch 1230. The locking latch 1240 drives the contact support 1250 to rotate, so as to drive the moving contact member 1300 to separate from the static contact member 1400, and the tripping latch 1230 pushes the indicating member 1500 to slide towards the position facing the indicating hole 1110.

[0078] The actuation of the trip 1600 means that the coil of the trip 1600 is energized, so that the ejector rod of the trip 1600 pops out, and the triggering end 1610 is driven by the ejector rod to pop out towards the locking latch 1240, pushing the locking latch 1240 to rotate, and further enabling the locking latch 1240 to drive the contact support 1250 to rotate, so as to drive the moving contact member 1300 to separate from the static contact member 1400.

[0079] Among them, the trip 1600 can be a direct-acting trip 1600, which has a simple structure and a small volume, and has certain advantages when used in the shunt trip 1000 with limited space.

[0080] The indicating member 1500 is used to indicate the state of the shunt trip 1000, especially the tripping state. Since the trip 1600 drives the shunt trip 1000 to trip from the inside of the housing 1100, therefore, if the indicating member 1500 is not provided, it is difficult to judge whether the shunt trip 1000 has tripped smoothly. After the indicating member 1500 is provided, during tripping, the tripping latch 1230 pushes the indicating member 1500 to slide towards the position facing the indicating hole 1110. Thus, a person can see the indicating member 1500 from outside the indicating hole 1110 and judge that the shunt trip 1000 has tripped smoothly through this signal.

[0081] Please continue to refer to Figure 2 and Figure 3, in some embodiments, the indicating member 1500 includes an indicating plate 1510 and a protruding portion 1520 protruding from the inner side of the indicating plate 1510; a first pushing portion 1530 is provided on the contact support 1250, and a second pushing portion 1540 is provided on the toggle 1230. The first pushing portion 1530 is disposed on the first side of the protruding portion 1520, and the second pushing portion 1540 is disposed on the second side of the protruding portion 1520. When the indicating plate 1510 is disposed opposite the indicating hole 1110, when the handle 1210 rotates to the second position B, the first pushing portion 1530 pushes the protruding portion 1520 from the first side, so that the indicating plate 1510 slides in a direction away from the indicating hole 1110; when the release 1600 drives the latch 1240 to disengage from the toggle 1230, the second pushing portion 1540 pushes the protruding portion 1520 from the second side, so that the indicating plate 1510 slides to a position opposite the indicating hole 1110.

[0082] The first pushing portion 1530, the second pushing portion 1540, and the protruding portion 1520 are all structures protruding from their installation positions, and the specific shapes and structures thereof are not limited in the embodiments of the present application.

[0083] The movement of the indicating member 1500 to a position opposite the indicating hole 1110 is achieved by the second pushing portion 1540 pushing the protruding portion 1520 from the second side. The movement of the indicating member 1500 away from the position opposite the indicating hole 1110 is achieved by the first pushing portion 1530 pushing the protruding portion 1520 from the first side.

[0084] Through the above-described position settings of the protruding portion 1520, the first pushing portion 1530, and the second pushing portion 1540, the indicating member 1500 can be in a position opposite the indicating hole 1110 when the shunt trip 1000 trips, and leave the position opposite the indicating hole 1110 when the shunt trip 1000 is reclosed after tripping, without affecting the judgment of the tripping state of the shunt trip 1000 by personnel.

[0085] As shown in the figure, in some embodiments, a linkage rod 1700 is provided on the handle 1210. The linkage rod 1700 extends toward one side in the thickness direction of the housing 1100 of the shunt trip 1000. The linkage rod 1700 is used to connect with the driving handle of the circuit breaker 2000 so that the handle 1210 and the driving handle rotate synchronously.

[0086] The linkage rod 1700 can be integrally provided with the handle 1210. For example, the handle 1210 and the linkage rod 1700 can be formed as a whole by injection molding.

[0087] Optionally, the end of the linkage rod 1700 away from the handle 1210 extends beyond the edge of the housing 1100 of the shunt trip 1000 so that when the shunt trip 1000 is connected to the driving handle of the circuit breaker 2000, the linkage rod 1700 can reach the driving handle of the circuit breaker 2000.

[0088] By providing the linkage rod 1700, when the shunt trip 1000 is spliced with the circuit breaker 2000, the linkage rod 1700 can be inserted into the driving handle of the circuit breaker 2000 or connected in other ways, so that the handle 1210 and the driving handle can rotate synchronously, and the opening and closing of the circuit breaker 2000 and the shunt trip 1000 can be realized synchronously.

[0089] As Figure 2 and Figure 3 shown, in some embodiments, the shunt trip 1000 further includes two terminal blocks 1800. The two terminal blocks 1800 are respectively located on opposite sides of the housing 1100. The terminal block 1800 includes a terminal box 1810 and a terminal screw 1820 connected to the terminal box 1810. The model of the terminal screw 1820 is larger than M3.5.

[0090] The two terminal blocks 1800 are respectively an incoming line terminal and an outgoing line terminal. In the related art, the two terminal blocks 1800 are located on the same side of the housing 1100. In order to facilitate wiring by personnel, the ends of the terminal screws 1820 of the two terminal blocks 1800 need to be arranged in a staggered manner, and the two terminal blocks 1800 cannot interfere with each other during wiring. This results in limited dimensions of the terminal screws 1820, and usually only M3.5 terminal screws can be used. The maximum tightening torque of the M3.5 terminal screw is 1 N·m. During the user's use of the shunt trip 1000, sometimes a torque greater than the maximum tightening torque of the M3.5 terminal screw is used to tighten the terminal screw of the shunt trip 1000, resulting in cracking or damage of the terminal block 1800 of the shunt trip 1000.

[0091] In this application, the two terminal blocks 1800 are respectively located on both sides of the housing 1100, so the two terminal blocks 1800 do not affect each other. Within the dimension range of the housing 1100, the dimensions of the terminal block 1800 can be made as large as possible, so that a terminal block 1800 with reliable wiring formed by the combination of the terminal box 1810 and the terminal screw 1820 can be used. Moreover, the dimension of the terminal screw 1820 is also larger.

[0092] By using a terminal screw with a model larger than M3.5, the tightening torque that the terminal screw 1820 can withstand is larger, reducing the probability of cracking and damage of the terminal block 1800 during use.

[0093] Exemplarily, the terminal screw 1820 can use an M6.5 screw. This terminal screw 1820 is larger than the terminal screw 1820 in the related art, facilitating assembly during the production process and being convenient for users to use during wiring.

[0094] Please continue to refer to Figure 2 and Figure 3, Optionally, the shunt trip 1000 further includes two terminal blocks 1900, namely an incoming line terminal block and an outgoing line terminal block. The incoming line terminal block 1900 is connected to the incoming line terminal, and the outgoing line terminal block is connected to the outgoing line terminal. The incoming line terminal block is connected to the moving contact 1300, and the outgoing line terminal block is connected to the coil of the trip 1600. In this way, when the shunt trip 1000 is closed, the main circuit composed of the incoming line terminal block, the moving contact 1300, the static contact 1400, the coil of the trip 1600, and the outgoing line terminal block is conducted.

[0095] Among them, the connection between the incoming line terminal block and the moving contact 1300 can be connected by a braided wire. This connection structure is a flexible connection. When the moving contact 1300 swings, the braided wire is not easily broken, and the connection structure between the incoming line terminal block and the moving contact 1300 is more reliable.

[0096] The connection between the outgoing line terminal block and the coil of the trip 1600 can be welded by a busbar. The positions of the outgoing line terminal block and the trip 1600 remain unchanged during use. Therefore, the method of welding them by a busbar can ensure the reliability of the electrical connection between the outgoing line terminal block and the coil of the trip 1600.

[0097] In summary, in the embodiment of the present application, by directly connecting the contact support 1250 to the housing 1100 of the shunt trip 1000, the support member is omitted, the number of parts is reduced, and the cost of the shunt trip 1000 is reduced. Through the cooperation of the contact support 1250 with the latch 1240, the trip latch 1230, the connecting rod 1220, and the handle 1210, on the basis of reducing the parts of the shunt trip 1000, the shunt trip 1000 can still realize opening and closing, and can realize locking in the opening and closing states, preventing the moving contact 1300 from being actuated when not under manual control.

[0098] The embodiment of the present application also provides a splicing structure of a shunt trip and a circuit breaker. As Figure 10 and Figure 11 shown, Figure 10 is a schematic diagram of a splicing structure of a shunt trip and a circuit breaker provided by the embodiment of the present application. Figure 11 is a schematic diagram of the internal structure of a circuit breaker in a splicing structure of a shunt trip and a circuit breaker provided by the embodiment of the present application.

[0099] The splicing structure of the shunt trip and the circuit breaker includes a circuit breaker 2000 and the shunt trip 1000 in any of the above embodiments. The circuit breaker 2000 includes a first connecting rod 2110, a first latch 2130, and a first trip latch 2120. The first connecting rod 2110 is the same as the connecting rod 1220, the first latch 2130 is the same as the latch 1240, and the first trip latch 2120 is the same as the trip latch 1230.

[0100] The circuit breaker 2000 is used in combination with the shunt trip release 1000. The remote control of the circuit breaker 2000 is realized through the shunt trip release 1000, increasing the applicable scenarios of the circuit breaker 2000. For example, in scenarios where it is not convenient to manually operate the circuit breaker 2000 to trip in a timely manner, the shunt trip release 1000 can be remotely controlled to trip, realizing the trip control of the circuit breaker 2000, enabling the circuit breaker 2000 to trip and cut off the power in a timely manner in case of an emergency, and avoiding safety accidents.

[0101] Among them, the functions of the first connecting rod 2110, the first locking latch 2130, and the first tripping latch 2120 in the circuit breaker 2000 can be the same as or different from the functions of the corresponding connecting rod 1220, locking latch 1240, and tripping latch 1230 in the shunt trip release 1000. The embodiments of the present application do not limit this. For example, the circuit breaker 2000 includes a first operating mechanism 2100, and the first operating mechanism 2100 includes a first connecting rod 2110, a first locking latch 2130, and a first tripping latch 2120. The connection method and function of the first connecting rod 2110, the first locking latch 2130, and the first tripping latch 2120 in the circuit breaker 2000 are the same as the connection method and function of the connecting rod 1220, locking latch 1240, and tripping latch 1230 in the shunt trip release 1000, and are all used for tripping and closing.

[0102] By adopting the above solution, the connecting rod 1220, the locking latch 1240, and the tripping latch 1230 in the shunt trip release 1000 are also used in the circuit breaker 2000 as the first connecting rod 2110, the first locking latch 2130, and the first tripping latch 2120, realizing the universality of parts and reducing the design and manufacturing costs of parts.

[0103] Optionally, as Figure 11 shown, in some embodiments, the operating mechanism 1200 of the shunt trip release 1000 further includes a reset member 1260, and the reset member 1260 is connected to the locking latch 1240. When a flexible arm 1270 is provided on the reset member 1260, the circuit breaker 2000 also includes a first reset member 2140, and the first reset member 2140 is connected to the first locking latch 2130. A first flexible arm 2150 is provided on the first reset member 2140. Among them, the first reset member 2140 is the same as the reset member 1260, and the first flexible arm 2150 is the same as the flexible arm 1270.

[0104] Optionally, as Figure 11 shown, when the shunt trip release 1000 further includes a release 1600, the circuit breaker 2000 includes a first release 2200. Except for the coil, the remaining parts of the first release 2200 have the same structure as the release 1600.

[0105] In the above two alternative embodiments, the number of common parts between the shunt trip 1000 and the circuit breaker 2000 is further increased, reducing the design and manufacturing costs of the parts.

[0106] Those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments is meant to be within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shunt trip, characterized in that, Comprising: A housing; An operating mechanism, which includes a handle, a connecting rod, a toggle, a latch and a contact support. The handle is rotatably connected to the housing, and a part of the handle extends out of the housing. The contact support is provided with a first connecting shaft, a second connecting shaft and a third connecting shaft. The contact support is rotatably connected to the housing through the first connecting shaft. The latch is rotatably connected to the contact support through the second connecting shaft. The toggle is rotatably connected to the contact support through the third connecting shaft, and the toggle is lapped with the latch. The latch is provided with a card slot, and a part of the contact support is located in the card slot. The two ends of the connecting rod are bent, one end of which is rotatably connected to the toggle, and the other end is rotatably connected to the handle; A moving contact, connected to the contact support; A static contact, connected to the housing; The handle can rotate between a first position and a second position. When the handle rotates from the first position to the second position, the handle drives the toggle, the contact support and the latch to rotate through the connecting rod, so that the moving contact contacts the static contact. When the handle rotates from the second position to the first position, the handle drives the toggle, the contact support and the latch to rotate in the opposite direction through the connecting rod, so that the moving contact is separated from the static contact.

2. The shunt trip according to claim 1, characterized in that, The operating mechanism further includes a reset member. The contact support is provided with a fourth connecting shaft. The reset member is rotatably connected to the fourth connecting shaft, and the reset member is connected to the latch for synchronously rotating relative to the contact support with the latch; The reset member is provided with a flexible arm. The housing is provided with an abutting platform. When the handle is in the first position, the flexible arm abuts against the abutting platform, and the flexible arm has elastic deformation under the pushing of the abutting platform, so that the flexible arm drives the latch and the toggle to be closely lapped through the reset member.

3. The shunt trip according to claim 1, characterized in that, The moving contact includes a flexible reed and a moving silver point provided on the flexible reed. After the moving silver point contacts the static contact, the flexible reed deforms, so that there is a pre-pressure between the moving silver point and the static contact.

4. The shunt trip according to claim 3, characterized in that, The connection mode of the flexible reed and the contact support is in-mold injection or snap connection.

5. The shunt trip according to claim 1, characterized in that, Further comprising: An indicating member. The housing is provided with an indicating hole. The indicating member is slidably arranged on the side wall where the indicating hole is located, and the indicating member is arranged on one side of the toggle; A release, the release is provided with a trigger end, the trigger end faces the latch. When the release is actuated, the trigger end pops out to drive the latch to rotate and disengage from the toggle. The latch drives the contact support to rotate to drive the moving contact to separate from the static contact, and the toggle pushes the indicating member to slide towards the position directly opposite to the indicating hole.

6. The shunt trip according to claim 5, characterized in that, The indicating member includes an indicating plate and a protruding portion protruding from the inner side of the indicating plate; A first pushing portion is provided on the contact support, and a second pushing portion is provided on the trip latch. The first pushing portion is disposed on a first side of the protruding portion, and the second pushing portion is disposed on a second side of the protruding portion. When the indicating plate is disposed opposite the indicating hole, when the handle rotates to the second position, the first pushing portion pushes the protruding portion from the first side, so that the indicating plate slides in a direction away from the indicating hole; when the release drives the latch to disengage from the trip latch, the second pushing portion pushes the protruding portion from the second side, so that the indicating plate slides to a position opposite the indicating hole.

7. The shunt trip device according to claim 1, wherein A linkage rod is provided on the handle, and the linkage rod extends toward one side in the thickness direction of the housing. The linkage rod is used to connect with the driving handle of the circuit breaker, so that the handle and the driving handle rotate synchronously.

8. The shunt trip according to claim 1, characterized in that, It further includes two wiring terminals. The two wiring terminals are respectively located on opposite sides of the housing. The wiring terminal includes a terminal box and a wiring screw connected to the terminal box. The model of the wiring screw is larger than M3.

5.

9. A splicing structure of a shunt trip and a circuit breaker, characterized in that, It includes a circuit breaker and the shunt trip of any one of claims 1-8. The circuit breaker includes a first connecting rod, a first latch and a first trip latch. The first connecting rod is the same as the connecting rod, the first latch is the same as the latch, and the first trip latch is the same as the trip latch.

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