Tripping assembly and circuit breaker

Abstract

The utility model discloses a tripping assembly and a circuit breaker, and relates to the technical field of low-voltage electrics. The tripping assembly comprises a coil framework, an ejector rod, a magnet yoke, a first movable iron core and a second movable iron core, wherein the first movable iron core and the second movable iron core are arranged in the coil framework in the first direction; the ejector rod sequentially penetrates through the first movable iron core and the second movable iron core; the magnet yoke is arranged on the outer walls of the coil framework and the second movable iron core; the magnet yoke comprises an abutting plate, and the ejector rod vertically penetrates through the abutting plate; the first movable iron core drives the ejector rod to move towards the operating mechanism in the first direction according to the first tripping signal until the first movable iron core abuts against the second movable iron core; the second movable iron core moves towards the operating mechanism in the first direction according to the second tripping signal and drives the ejector rod to move synchronously through a one-way limiting structure on the inner wall, and the ejector rod drives the operating mechanism to be tripped and opened. According to the tripping assembly, the occupied volume of the tripping assembly is reduced, the functional diversity of the tripping assembly is improved, and the tripping accuracy and sensitivity are improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical technology, in particular to a trip assembly and a circuit breaker. Background Art

[0002] A circuit breaker is a low-voltage electrical component primarily used in industrial power distribution systems, connecting and disconnecting circuits. Typically, circuit breakers interrupt current under abnormal circuit conditions by using an internal trip assembly.

[0003] In order to prevent irreversible damage to electrical equipment caused by excessive transient current in the circuit, existing circuit breakers are usually equipped with a backup protection release. After receiving a short-circuit signal, the backup protection release responds and extends a push rod. The push rod strikes the operating mechanism, causing the operating mechanism to trip and disconnect the circuit. In addition, circuit breakers are usually also equipped with an instantaneous release to prevent faults such as electric shock, fire, and line aging. When the instantaneous release detects excessive transient current, it responds and extends a push rod. The push rod strikes the operating mechanism, causing the operating mechanism to trip and disconnect the circuit.

[0004] In the prior art, the instantaneous release and the backup protection release are two separate components, which are arranged near the operating mechanism to disconnect the operating mechanism according to the instantaneous signal and the short-circuit signal respectively. The two independent components not only occupy a large space, but also because the space around the operating mechanism is limited, the two independent components are not sensitive to the driving of the operating mechanism. Utility Model Content

[0005] The purpose of the utility model is to provide a trip assembly and a circuit breaker, which can realize the disconnection of the operating mechanism according to the instantaneous signal and the short-circuit signal respectively, thereby improving the space utilization of the circuit breaker and the functional diversity, tripping accuracy and sensitivity of the trip assembly.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] On the one hand, the utility model provides a tripping assembly, including a coil skeleton, a push rod, a yoke, a first moving iron core and a second moving iron core arranged in the coil skeleton along a first direction, and the push rod passes through the first moving iron core and the second moving iron core in sequence; the yoke is arranged on the outer wall of the coil skeleton and the second moving iron core; the yoke includes an abutment plate perpendicular to the end face of the second moving iron core, and the push rod is vertically passed through the abutment plate; the first tripping signal acts on the first moving iron core, and the first moving iron core drives the push rod to move along the first direction toward the operating mechanism according to the first tripping signal until the first moving iron core abuts the second moving iron core, and the push rod drives the operating mechanism to trip and open the switch; the second tripping signal acts on the second moving iron core, and a one-way limiting structure is provided in the second moving iron core. The second moving iron core moves along the first direction toward the operating mechanism according to the second tripping signal, and drives the push rod to move synchronously through the one-way limiting structure until the end of the second moving iron core abuts the abutment plate, and the push rod drives the operating mechanism to trip and open the switch.

[0008] Optionally, a voltage coil is wound around the outer periphery of the first moving iron core, which can sense instantaneous signals and drive the first moving iron core to move; a current coil is wound around the outer periphery of the second moving iron core arranged outside the coil frame, which can sense short-circuit signals and drive the second moving iron core to move.

[0009] Optionally, the first moving iron core includes a first body and a first contact portion protruding from the outer peripheral wall of the first body, and the first contact portion is arranged around one end of the first body close to the second moving iron core, so that the outer diameter of the end face of the first moving iron core facing the second moving iron core is larger than the inner diameter of the second moving iron core, and the end face of the second moving iron core facing the first moving iron core can abut against the end face of the second moving iron core.

[0010] Optionally, the push rod is fixedly connected to the first moving iron core, and the push rod includes a second body and a second contact portion, and the second contact portion is located on the outer wall of the part of the push rod that passes through the second moving iron core; the one-way limiting structure includes a limiting wall protruding from the inner wall of the second moving iron core, and when the second moving iron core moves along the first direction toward the operating mechanism, the end face of the limiting wall can abut against the end face of the second contact portion, so that the second moving iron core drives the push rod to move along the first direction.

[0011] Optionally, a trip spring is sleeved on one end of the outer wall of the push rod facing the first moving iron core, one end of the trip spring abuts against the end surface of the first moving iron core facing the second moving iron core, and the other end is located in the second moving iron core.

[0012] Optionally, a backup spring is sleeved on one end of the outer wall of the push rod facing the second moving iron core, one end of the backup spring abuts against the end surface of the limiting wall of the inner wall of the second moving iron core, and the other end abuts against the abutting plate of the yoke.

[0013] Optionally, the yoke includes a first clipping plate and a second clipping plate parallel to the abutment plate and spaced apart along the first direction, the first clipping plate and the second clipping plate are fixedly connected by a first connecting plate, and the second clipping plate and the abutment plate are fixedly connected by a second connecting plate; the first clipping plate and the second clipping plate are provided with clipping grooves along the edges, and the opposite ends of the coil frame are respectively clipped in the clipping grooves of the first clipping plate and the clipping grooves of the second clipping plate; the abutment plate is also provided with a push rod groove for passing a push rod.

[0014] Optionally, the first connecting plate and the second connecting plate are respectively arranged on opposite sides of the second clipping plate along the second direction; an insulating connector is provided on the edge of one end of the coil frame away from the first clipping plate, and the inner wall of the insulating connector can respectively abut the second clipping plate and the second connecting plate.

[0015] Optionally, a step wall is protruded from the inner wall of the coil skeleton, and the end face of the step wall can abut against the end face of the second moving iron core.

[0016] Another aspect of the present invention provides a circuit breaker, including an operating mechanism and a trip assembly, wherein the trip assembly includes a push rod, which is arranged opposite to the operating mechanism, and the trip assembly can drive the operating mechanism to open the circuit breaker through the push rod.

[0017] The beneficial effects of the present invention include at least one of the following:

[0018] The present application provides a tripping assembly, comprising a coil skeleton, a mandrel, a yoke, a first moving iron core and a second moving iron core arranged in the coil skeleton along a first direction, the mandrel passing through the first moving iron core and the second moving iron core in sequence; the yoke is arranged on the outer wall of the coil skeleton and the second moving iron core; through the arrangement of the coil skeleton, the trippers of the two tripping signals can be arranged as an integrated structure, so that the tripper of the present application can realize the tripping of the two tripping signals; the yoke includes an abutment plate perpendicular to the end face of the second moving iron core, the mandrel passing through the abutment plate perpendicularly; the first tripping The signal acts on the first moving iron core, which drives the push rod to move in the first direction toward the operating mechanism according to the first trip signal until the first moving iron core abuts the second moving iron core, and the push rod drives the operating mechanism to trip and open the switch. The second trip signal acts on the second moving iron core, and a one-way limiting structure is provided in the second moving iron core. The second moving iron core moves in the first direction toward the operating mechanism according to the second trip signal, and drives the push rod to move synchronously through the one-way limiting structure until the end of the second moving iron core abuts the abutment plate, and the push rod drives the operating mechanism to trip and open the switch. The above-mentioned trip assembly can realize the disconnection of the operating mechanism according to the instantaneous signal and the short-circuit signal respectively, which reduces the volume occupied by the trip assembly while increasing the functional diversity of the trip assembly. At the same time, both trip signals use the same push rod to drive the trip, which improves the trip accuracy and sensitivity.

[0019] The present application also provides a circuit breaker comprising an operating mechanism and a trip assembly. The trip assembly includes a push rod disposed opposite the operating mechanism, and the trip assembly is capable of driving the operating mechanism to trip via the push rod. The trip assembly enables the circuit breaker to disconnect the operating mechanism in response to both a transient signal and a short-circuit signal, thereby improving space utilization within the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a circuit breaker provided in an embodiment of the present utility model;

[0022] Figure 2 This is one of the structural diagrams of the trip assembly provided in an embodiment of the present utility model;

[0023] Figure 3 The second structural diagram of the trip assembly provided by the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the coil skeleton of the trip assembly provided in an embodiment of the present utility model;

[0025] Figure 5 The second structural diagram of the coil skeleton of the trip assembly provided by the embodiment of the utility model;

[0026] Figure 6 A schematic structural diagram of a coil skeleton of a magnetic yoke provided in an embodiment of the present invention;

[0027] Figure 7 A schematic structural diagram of a first moving iron core and a second moving iron core provided in an embodiment of the present utility model;

[0028] Figure 8 A schematic structural diagram of a push rod provided in an embodiment of the present utility model;

[0029] Figure 9 A cross-sectional view of a trip assembly provided in an embodiment of the present utility model;

[0030] Figure 10 This is a cross-sectional view of the abutment between the second moving iron core and the abutment plate of the trip assembly provided by an embodiment of the present utility model.

[0031] Icons: 100-trip assembly; 110-coil skeleton; 111-insulating connector; 112-step wall; 120-top rod; 121-second body; 122-second contact portion; 123-tripping spring; 124-backup spring; 130-yoke; 131-abutment plate; 1311-top rod slot; 132-first clamping plate; 133-second clamping plate; 134-first connecting plate; 135-second connecting plate; 136-clamping slot; 140-first moving iron core; 141-first body; 142-first contact portion; 150-second moving iron core; 151-limiting wall; 160-voltage coil; 170-current coil; 200-circuit breaker; 210-operating mechanism; a-first direction. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 7 This embodiment provides a trip assembly 100, comprising a coil bobbin 110, a push rod 120, a magnetic yoke 130, a first movable iron core 140 and a second movable iron core 150 disposed along a first direction a within the coil bobbin 110, the push rod 120 sequentially passing through the first movable iron core 140 and the second movable iron core 150; the magnetic yoke 130 is disposed on outer walls of the coil bobbin 110 and the second movable iron core 150; the magnetic yoke 130 includes an abutment plate 131 perpendicular to an end surface of the second movable iron core 150, and the push rod 120 is perpendicularly passed through the abutment plate 131;

[0039] The first tripping signal acts on the first moving iron core 140, and the first moving iron core 140 drives the push rod 120 to move along the first direction a toward the operating mechanism 210 according to the first tripping signal until the first moving iron core 140 abuts against the second moving iron core 150, and the push rod 120 drives the operating mechanism 210 to trip and open the switch; the second tripping signal acts on the second moving iron core 150, and a one-way limiting structure is provided in the second moving iron core 150. The second moving iron core 150 moves along the first direction a toward the operating mechanism 210 according to the second tripping signal, and drives the push rod 120 to move synchronously through the one-way limiting structure until the end of the second moving iron core 150 abuts against the abutting plate 131, and the push rod 120 drives the operating mechanism 210 to trip and open the switch.

[0040] Specifically, the present application provides a trip assembly 100. When the trip assembly 100 does not receive a first trip signal or a second trip signal, there is a preset distance between the first moving iron core 140 and the second moving iron core 150, and there is also a preset distance between the top rod 120 and the operating mechanism 210. At this time, the operating mechanism 210 of the circuit breaker 200 can work normally.

[0041] The first movable iron core 140 and the second movable iron core 150 are connected to form a common structure via the coil bobbin 110, so that the trip assembly 100 can drive the push rod 120 to trip the operating mechanism 210 according to the first trip signal, and can also drive the push rod 120 to trip the operating mechanism 210 according to the second trip signal. Compared with the prior art that provides two different trippers to respectively achieve tripping driven by the first trip signal and tripping of the operating mechanism driven by the second trip signal, the trip assembly 100 of the present application not only saves installation cost and installation space, but also improves the functional diversity of the trip assembly 100;

[0042] The second moving iron core 150 may partially extend out of the coil bobbin 110 , or may be completely disposed in the coil bobbin 110 .

[0043] In addition, since the trip assembly 100 uses the same push rod 120 to drive the operating mechanism 210 to trip through the first trip signal and the second trip signal, the position accuracy of the tripping of the push rod 120 and the operating mechanism 210 is improved, thereby improving the accuracy and sensitivity of the tripping process.

[0044] It should be noted that, first, in one embodiment of the present application, Figure 3 As shown, a backup spring 124 is sleeved on one end of the outer wall of the push rod 120 facing the second movable iron core 150 , and one end of the backup spring 124 abuts against the end surface of the limiting wall 151 of the inner wall of the second movable iron core 150 , and the other end abuts against the abutting plate 131 of the yoke 130 .

[0045] Specifically, when the first moving iron core 140 drives the push rod 120 to move toward the operating mechanism 210 along the first direction a, since one end of the backup spring 124 abuts against the end face of the limiting wall 151 of the inner wall of the second moving iron core 150 and the other end abuts against the abutment plate 131 of the yoke 130, under the action of the backup spring 124, when the first moving iron core 140 drives the push rod 120 to move toward the operating mechanism 210 along the first direction a, the second moving iron core 150 can be fixed relative to the first moving iron core 140, so that the first moving iron core 140 can abut against the second moving iron core 150, and at the same time, the setting of the backup spring 124 can also provide a reset force to the second moving iron core 150 and the push rod 120.

[0046] Second, if Figure 7 As shown, in one embodiment of the present application, a trip spring 123 is sleeved on one end of the outer wall of the push rod 120 facing the first movable iron core 140. One end of the trip spring 123 abuts against the end surface of the first movable iron core 140 facing the second movable iron core 150, and the other end is located within the second movable iron core 150. The provision of the trip spring 123 can provide a certain reset force for the first movable iron core 140.

[0047] Third, if Figure 2 As shown, in one possible embodiment of the present application, a voltage coil 160 is wound around the outer periphery of the first moving iron core 140. Preferably, the voltage coil 160 is arranged on the outer periphery of the coil frame 110; the voltage coil 160 can sense instantaneous signals and drive the first moving iron core 140 to move; a current coil 170 is wound around the outer periphery of the second moving iron core 150 arranged outside the coil frame 110, and the current coil 170 can sense short-circuit signals and drive the second moving iron core 150 to move.

[0048] Specifically, a voltage coil 160 capable of inducing instantaneous signals is provided on the outer periphery of the first moving iron core 140. For example, in one specific embodiment of the present application, a circuit signal is provided to the built-in circuit. At this time, the built-in circuit energizes the voltage coil 160 and generates a magnetic circuit under the action of the magnetic yoke 130 to drive the first moving iron core 140 to move the top rod 120 toward the operating mechanism 210 along the first direction a. At this time, the driving force of the magnetic circuit is less than the elastic force of the backup spring 124 to keep the position of the second moving iron core 150 fixed; in another specific embodiment of the present application, the built-in circuit generates an electrical signal in the event of overheating. At this time, the built-in circuit energizes the voltage coil 160 and generates a magnetic circuit under the action of the magnetic yoke 130 to drive the first moving iron core 140 to move the top rod 120 toward the operating mechanism 210 along the first direction a, thereby realizing instantaneous tripping of the trip assembly 100. It should be noted that the push rod 120 can be fixedly connected to the first moving iron core 140, or it can be not fixedly connected to the first moving iron core 140. As long as the first moving iron core 140 can drive the push rod 120 to move toward the operating mechanism 210 when moving toward the second moving iron core 150, this application does not impose any restrictions on the specific connection relationship between the push rod 120 and the first moving iron core 140.

[0049] A current coil 170 is wound around the outer circumference of the second movable iron core 150. The main circuit energizes the current coil 170, generating a magnetic circuit. When the current is sufficiently high (i.e., when the electromagnetic driving force is greater than the elastic force of the backup spring 124), the current coil 170, under the action of the magnetic yoke 130, drives the second movable iron core 150 in the first direction a, driving the push rod 120 toward the operating mechanism 210, thereby triggering the short-circuit signal tripping of the trip assembly 100. At this point, the first movable iron core 140 can follow the push rod 120 and move synchronously with the second movable iron core 150.

[0050] When the trip assembly 100 receives the first trip signal, the first movable iron core 140 drives the push rod 120 to move along the first direction a according to the first trip signal, wherein the first direction a is the arrangement direction of the first movable iron core 140 and the second movable iron core 150; the first movable iron core 140 can drive the push rod 120 to move toward the operating mechanism 210. At this time, the second movable iron core 150 acts as a static iron core until the first movable iron core 140 and the second movable iron core 150 abut against each other, and the push rod 120 just extends from the abutment plate 131 of the yoke 130 toward the operating mechanism 210 to drive the operating mechanism 210 to trip.

[0051] When the trip assembly 100 receives the second trip signal, Figure 9 As shown, since a one-way limiting mechanism is provided in the second movable iron core 150, the second movable iron core 150 can drive the ejector 120 to move synchronously along the first direction a toward the operating mechanism 210 according to the second tripping signal, as shown in FIG. Figure 10 As shown, at this time, the abutment plate 131 of the yoke 130 acts as a static iron core until the end face of the second moving iron core 150 abuts against the abutment plate 131, and the push rod 120 is just extended from the abutment plate 131 of the yoke 130 toward the operating mechanism 210 to drive the operating mechanism 210 to trip.

[0052] The above-mentioned trip assembly 100 can realize the disconnection of the operating mechanism 210 according to the instantaneous signal and the short-circuit signal respectively, thereby reducing the volume occupied by the trip assembly 100 while improving the functional diversity of the trip assembly 100. At the same time, both trip signals use the same push rod 120 to drive the tripping, thereby improving the tripping accuracy and sensitivity.

[0053] In one embodiment of the present application, Figure 7 As shown, the first moving iron core 140 includes a first body 141 and a first contact portion 142 protruding from the outer peripheral wall of the first body 141. The first contact portion 142 is arranged in a ring around one end of the first body 141 close to the second moving iron core 150, so that the outer diameter of the end face of the first moving iron core 140 facing the second moving iron core 150 is larger than the inner diameter of the second moving iron core 150, and the end face of the second moving iron core 150 facing the first moving iron core 140 can abut against the end face of the second moving iron core 150.

[0054] Specifically, if Figure 7As shown, the first moving iron core 140 includes a first body 141, and the outer peripheral wall of the first body 141 is convexly provided with a first contact portion 142, and the first contact portion 142 is ring-arranged on the end of the first body 141 close to the second moving iron core 150, so that the outer diameter of the end of the first moving iron core 140 close to the second moving iron core 150 is greater than the inner diameter of the second moving iron core 150. When the first moving iron core 140 drives the push rod 120 to move a preset distance along the first direction a toward the operating mechanism 210 according to the first tripping signal, its end can abut against the end of the second moving iron core 150, so as to limit the movement process of the first moving iron core 140.

[0055] In one embodiment of the present application, Figure 8 and Figure 9 As shown, the push rod 120 is fixedly connected to the first moving iron core 140, and the push rod 120 includes a second body 121 and a second contact portion 122. The second contact portion 122 is located on the outer wall of the part of the push rod 120 that passes through the second moving iron core 150; the one-way limiting structure includes a limiting wall 151 protruding from the inner wall of the second moving iron core 150. When the second moving iron core 150 moves along the first direction a toward the operating mechanism 210, the end face of the limiting wall 151 can abut against the end face of the second contact portion 122, so that the second moving iron core 150 drives the push rod 120 to move along the first direction a.

[0056] Specifically, if Figure 8 and Figure 9 As shown, the push rod 120 includes a second body 121 and a second contact portion 122 arranged on the outer wall of the second body 121, and the one-way limiting structure includes a limiting wall 151 protruding from the inner wall of the second moving iron core 150. When the second moving iron core 150 moves along the first direction a toward the operating mechanism 210, the end face of the limiting wall 151 can just abut against the end face of the second contact portion 122. At this time, the second moving iron core 150 can drive the push rod 120 toward the operating mechanism 210 through the second contact portion 122; since the end face of the limiting wall 151 only abuts against the end face of the second contact portion 122 on the side facing the first moving iron core 140, and the push rod 120 is fixedly connected to the first moving iron core 140, when the first moving iron core 140 drives the push rod 120 to move toward the operating mechanism 210, it will not drive the second moving iron core 150 to move. The second moving iron core 150 can drive the push rod 120 to move a preset distance toward the operating mechanism 210 through the second contact portion 122 until the end of the second moving iron core 150 contacts the abutment plate 131, and the abutment plate 131 serves to limit and fix the second moving iron core 150.

[0057] By setting the one-way limiting structure, the first movable iron core 140 and the second movable iron core 150 can respectively drive the push rod 120 to move, so that the trip assembly 100 can realize the disconnection process of the operating mechanism 210 according to the transient signal and the short-circuit signal independently and reliably.

[0058] For example, Figure 6 The yoke 130 includes a first clamping plate 132 and a second clamping plate 133 which are parallel to the abutment plate 131 and spaced apart along the first direction a. The first clamping plate 132 and the second clamping plate 133 are fixedly connected by a first connecting plate 134, and the second clamping plate 133 and the abutment plate 131 are fixedly connected by a second connecting plate 135; the first clamping plate 132 and the second clamping plate 133 are provided with clamping grooves 136 along the edges, and the opposite ends of the coil skeleton 110 are respectively clamped in the clamping groove 136 of the first clamping plate 132 and the clamping groove 136 of the second clamping plate 133; the abutment plate 131 is also provided with a push rod groove 1311 for passing the push rod 120.

[0059] Specifically, if Figure 6 As shown, the yoke 130 includes a first clipping plate 132 and a second clipping plate 133, and the first clipping plate 132, the second clipping plate 133 and the abutment plate 131 are arranged at intervals and parallel to each other; the yoke 130 also includes a first connecting plate 134 and a second connecting plate 135, and the first clipping plate 132 and the second clipping plate 133 are fixedly connected by the first connecting plate 134, and the second clipping plate 133 and the abutment plate 131 are fixedly connected by the second connecting plate 135.

[0060] Optionally, in a specific embodiment of the present application, the first connecting plate 134 and the second connecting plate 135 are respectively arranged on opposite sides of the second clip-on plate 133 along the second direction, and the first connecting plate 134 and the second connecting plate 135 are respectively perpendicular to the second clip-on plate 133, that is, the yoke 130 has an "S"-shaped structure; in another optional embodiment of the present application, the first connecting plate 134 and the second connecting plate 135 can also be arranged on the same side of the second clip-on plate 133, and the first connecting plate 134 and the second connecting plate 135 are respectively perpendicular to the second clip-on plate 133, that is, the yoke 130 has an "E"-shaped structure. The present application does not impose any restrictions on the specific setting method of the first connecting plate 134 and the second connecting plate 135.

[0061] like Figure 6The first clipping plate 132 and the second clipping plate 133 are provided with a clipping groove 136 along the edge. Preferably, in order to adapt to the shape structure of the coil skeleton 110, the clipping groove 136 is a U-shaped structure; alternatively, through holes can be provided on the first clipping plate 132 and the second clipping plate 133 for passing the coil skeleton 110. The present application does not impose any limitation on the specific connection method of the first clipping plate 132, the second clipping plate 133 and the coil skeleton 110.

[0062] like Figure 6 The abutment plate 131 is also provided with a push rod groove 1311 for passing the push rod 120. One side of the push rod groove 1311 is opened along the edge of the abutment plate 131 for passing the push rod 120; alternatively, a through hole can be opened on the abutment plate 131 to pass the push rod 120. The present application does not impose any restrictions on the specific passing method of the abutment plate 131 and the push rod 120.

[0063] Please refer to Figure 3 and Figure 4 In an optional embodiment of the present application, an insulating connector 111 is provided at an edge of one end of the coil skeleton 110 away from the first clamping plate 132, and the inner wall of the insulating connector 111 can respectively abut the second clamping plate 133 and the second connecting plate 135.

[0064] For details, please refer to Figure 3 and Figure 4 An insulating connector 111 is protruding from one edge of the coil bobbin 110 away from the first clamping plate 132. The insulating connector 111 comprises a slot, the inner walls of which are capable of contacting the second clamping plate 133 and the second connecting plate 135, respectively, to provide insulation and positional fixation for the coil bobbin 110. Preferably, the slot is L-shaped, and correspondingly, the first connecting plate 134 and the second connecting plate 135 are disposed perpendicularly to opposite sides of the second clamping plate 133 along the second direction, thereby enhancing the connection stability between the insulating connector 111 and the coil bobbin 110.

[0065] For example, Figure 5 As shown, a step wall 112 is protruded from the inner wall of the coil skeleton 110, and the step wall 112 is arranged on the side of the coil skeleton 110 facing the second moving iron core 150. The end face of the step wall 112 can abut against the end face of the second moving iron core 150, so as to limit and fix the part of the second moving iron core 150 arranged in the coil skeleton 110, thereby preventing the second moving iron core 150 from contacting the second moving iron core 150 due to the reset force of the backup spring 124, thereby improving the tripping reliability of the tripping assembly 100.

[0066] Another aspect of the present invention is as follows Figure 1As shown, a circuit breaker 200 is provided, comprising a trip assembly 100 and an operating mechanism 210. The trip assembly 100 includes a push rod 120, which is disposed opposite the operating mechanism 210. When the trip assembly 100 receives a first trip signal or a second trip signal, the push rod 120 can be driven toward the operating mechanism 210. At this time, the push rod 120 can abut against a latch of the operating mechanism 210, thereby opening the operating mechanism 210. The specific structure and beneficial effects of the trip assembly 100 have been described in detail above and will not be repeated here.

[0067] The circuit breaker 200 is provided with the trip assembly 100 , and can realize the disconnection of the operating mechanism 210 according to the instantaneous signal and the short-circuit signal through the trip assembly 100 , thereby improving the space utilization inside the circuit breaker 200 .

[0068] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0069] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A trip assembly, characterized in that: The invention comprises a coil frame (110), a top rod (120), a magnetic yoke (130), a first moving iron core (140) and a second moving iron core (150) arranged in the coil frame (110) along a first direction (a), wherein the top rod (120) passes through the first moving iron core (140) and the second moving iron core (150) in sequence; the magnetic yoke (130) is arranged on the outer walls of the coil frame (110) and the second moving iron core (150); the magnetic yoke (130) comprises an abutment plate (131) perpendicular to the end face of the second moving iron core (150), and the top rod (120) passes through the abutment plate (131) perpendicularly; A first tripping signal acts on the first movable iron core (140), and the first movable iron core (140) drives the push rod (120) to move along a first direction (a) toward the operating mechanism (210) according to the first tripping signal, until the first movable iron core (140) abuts against the second movable iron core (150), and the push rod (120) drives the operating mechanism (210) to trip and open the switch; a second tripping signal acts on the second movable iron core (150), and a one-way limiting structure is provided in the second movable iron core (150), and the second movable iron core (150) moves along the first direction (a) toward the operating mechanism (210) according to the second tripping signal, and drives the push rod (120) to move synchronously through the one-way limiting structure, until the end of the second movable iron core (150) abuts against the abutting plate (131), and the push rod (120) drives the operating mechanism (210) to trip and open the switch.

2. The trip assembly according to claim 1, characterized in that: A voltage coil (160) is wound around the outer periphery of the first moving iron core (140), and the voltage coil (160) is capable of sensing an instantaneous signal and driving the first moving iron core (140) to move; a current coil (170) is wound around the outer periphery of the second moving iron core (150) arranged outside the coil frame (110), and the current coil (170) is capable of sensing a short-circuit signal and driving the second moving iron core (150) to move.

3. The trip assembly according to claim 1, wherein: The first moving iron core (140) includes a first body (141) and a first contact portion (142) protruding from the outer peripheral wall of the first body (141). The first contact portion (142) is arranged around one end of the first body (141) close to the second moving iron core (150), so that the outer diameter of the end face of the first moving iron core (140) facing the second moving iron core (150) is larger than the inner diameter of the second moving iron core (150), and the end face of the second moving iron core (150) facing the first moving iron core (140) can abut against the end face of the second moving iron core (150).

4. The trip assembly according to claim 1, wherein: The push rod (120) is fixedly connected to the first movable iron core (140), and the push rod (120) includes a second body (121) and a second contact portion (122), and the second contact portion (122) is located on the outer wall of the portion of the push rod (120) that passes through the second movable iron core (150); the one-way limiting structure includes a limiting wall (151) protruding from the inner wall of the second movable iron core (150), and when the second movable iron core (150) moves along the first direction (a) toward the operating mechanism (210), the end face of the limiting wall (151) can abut against the end face of the second contact portion (122), so that the second movable iron core (150) drives the push rod (120) to move along the first direction (a).

5. The trip assembly according to claim 1, wherein: An opening spring (123) is sleeved on one end of the outer wall of the push rod (120) facing the first moving iron core (140); one end of the opening spring (123) abuts against the end surface of the first moving iron core (140) facing the second moving iron core (150), and the other end is located inside the second moving iron core (150).

6. The trip assembly according to claim 4, characterized in that: A backup spring (124) is sleeved on one end of the outer wall of the push rod (120) toward the second moving iron core (150); one end of the backup spring (124) abuts against the end surface of the limiting wall (151) of the inner wall of the second moving iron core (150), and the other end abuts against the abutting plate (131) of the magnetic yoke (130).

7. The trip assembly according to claim 1, wherein: The magnetic yoke (130) comprises a first clamping plate (132) and a second clamping plate (133) which are parallel to the abutting plate (131) and spaced apart along a first direction (a); the first clamping plate (132) and the second clamping plate (133) are fixedly connected via a first connecting plate (134); the second clamping plate (133) and the abutting plate (131) are fixedly connected via a second connecting plate (135); the first clamping plate (132) and the second clamping plate (133) are provided with a clamping groove (136) along their edges; the opposite ends of the coil skeleton (110) are respectively clamped in the clamping groove (136) of the first clamping plate (132) and the clamping groove (136) of the second clamping plate (133); the abutting plate (131) is further provided with a push rod groove (1311) for passing a push rod (120).

8. The trip assembly according to claim 7, characterized in that: The first connecting plate (134) and the second connecting plate (135) are respectively arranged on opposite sides of the second clamping plate (133) along the second direction; an insulating connector (111) is provided on the edge of one end of the coil skeleton (110) away from the first clamping plate (132), and the inner wall of the insulating connector (111) can respectively abut the second clamping plate (133) and the second connecting plate (135).

9. The trip assembly according to claim 1, wherein: A step wall (112) is protruding from the inner wall of the coil frame (110), and the end surface of the step wall (112) can abut against the end surface of the second moving iron core (150).

10. A circuit breaker, characterized in that: The invention comprises an operating mechanism (210) and a trip assembly (100) according to any one of claims 1 to 9, wherein the trip assembly (100) comprises a top rod (120), the top rod (120) is arranged opposite to the operating mechanism (210), and the trip assembly (100) can drive the operating mechanism (210) to open the circuit breaker through the top rod (120).

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