Tripping structure and circuit breaker

Abstract

The invention discloses a tripping structure and a circuit breaker, and relates to the low-voltage electrical technical field. The tripping structure comprises a pushing piece, a thermal tripping piece and an electromagnetic tripping assembly, wherein the thermal tripping piece and the electromagnetic tripping assembly are respectively matched with the pushing piece; the pushing piece comprises a first driving surface and a second driving surface which are arranged at an interval; the electromagnetic tripping assembly comprises a push rod; the deformation end of the thermal tripping piece is arranged on one side, deviating from the second driving surface, of the first driving surface; the deformation end of the push rod and the deformation end of the thermal tripping piece independently drive the pushing piece to move through the first driving face, and the second driving face is used for driving the operating mechanism to unlock. According to the tripping structure, through the position arrangement of the pushing piece, the driving force of the thermal tripping piece and the electromagnetic tripping assembly can be directly transmitted to the operating mechanism through the pushing piece, and compared with the existing two-stage transmission arrangement, the tripping structure provided by the invention has the advantages that the transmission links are reduced, the transmission loss is reduced, and the transmission efficiency of the driving force is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical technology, in particular to a tripping structure and a circuit breaker. BACKGROUND

[0002] The tripping mechanism is a core safety component in the circuit breaker, which is used to drive the lock to unlock and realize rapid tripping to protect the electrical system when the circuit is overloaded or short-circuited.

[0003] In the existing tripping structure, the electromagnetic tripping and the bimetallic strip thermal tripping need to drive the tripping component to rotate through independent transmission mechanisms, and then drive the lock of the operating mechanism to unlock and trip. However, such a two-stage transmission method has poor synchronicity in multi-stage tripping, and the driving force is easily attenuated due to transmission loss in the multi-stage tripping scenario, which easily causes tripping failure risk. SUMMARY

[0004] The purpose of the present application is to provide a tripping structure and a circuit breaker, which are compact in structure, efficient in transmission, and improve the tripping efficiency and reliability.

[0005] The embodiments of the present application are implemented as follows: In one aspect of the present application, a tripping structure is provided, which comprises a pushing piece, a thermal tripping piece and an electromagnetic tripping component arranged respectively in cooperation with the pushing piece; the pushing piece comprises a first driving surface and a second driving surface arranged at intervals; the electromagnetic tripping component comprises a push rod; the deformed end of the thermal tripping piece is arranged on the side of the first driving surface away from the second driving surface; the push rod and the deformed end of the thermal tripping piece independently drive the pushing piece to move through the first driving surface respectively, and the second driving surface is used to drive the operating mechanism to unlock.

[0006] Optionally, the pushing piece comprises a mounting groove and a contact rod connected with each other, one side wall of the mounting groove forms the first driving surface, the contact rod is protruded on the side of the mounting groove away from the first driving surface, and the second driving surface is located at the end of the contact rod; the electromagnetic tripping component is slidably arranged in the mounting groove.

[0007] Optionally, the electromagnetic tripping component comprises a core assembly and a magnetic yoke sleeved outside the core assembly, one end of the push rod is arranged in the core assembly and the other end extends outside the core assembly and penetrates through the first driving surface; the magnetic yoke comprises a bottom plate and limiting plates vertically arranged on opposite sides of the bottom plate respectively, the limiting plates are arranged in parallel with the first driving surface and the second driving surface respectively; the push rod drives the pushing piece to move along the axial direction of the push rod through the first driving surface, so that the two side walls of the mounting groove abut against the two limiting plates of the magnetic yoke respectively.

[0008] Optionally, a first limiting groove is formed on the side of the limiting plate facing the bottom plate, and the groove bottom of the mounting groove is at least partially clamped in the first limiting groove in the width direction, which is perpendicular to the axial direction of the push rod.

[0009] Optionally, a first abutting part is protruded from the groove bottom of the mounting groove towards the side away from the core assembly, the bottom plate of the magnetic yoke is provided with a second limiting groove corresponding to the first abutting part, the first abutting part is arranged in the second limiting groove, and the side wall of the first abutting part can abut against the inner wall of the second limiting groove; when the ejecting part moves along the axis direction of the push rod, the first abutting part can slide along the inner wall of the second limiting groove.

[0010] Optionally, the limiting plate of the magnetic yoke is provided with a third limiting groove, and the third limiting grooves of the two limiting plates are oppositely arranged; one of the third limiting grooves is used for penetrating the push rod, and the other third limiting groove is used for clamping the end of the core assembly.

[0011] Optionally, the first driving surface is provided with a through hole, and the push rod is arranged in the through hole; the end of the push rod is protruded with a limiting table, and the outer diameter of the limiting table is greater than the inner diameter of the through hole.

[0012] Optionally, the ejecting part is protruded with a second abutting part, and the second abutting part has a first abutting surface arranged towards the operating mechanism; the trip structure further comprises a reset part, one end of the reset part abuts against the first abutting surface, and the other end abuts against a second abutting surface arranged on the base of the circuit breaker; the energy releasing direction of the reset part is the same as the direction of the line connecting the first driving surface and the second driving surface; the ejecting part is driven to move towards the operating mechanism, the first abutting surface compresses the reset part towards the second abutting surface, and the reset part stores energy under stress; after the circuit breaker is tripped, the reset part releases energy to drive the ejecting part to reset through the first abutting surface.

[0013] Optionally, the first abutting surface is protruded with a mounting column towards the second abutting surface, and the end of the reset part is sleeved on the outer periphery of the mounting column.

[0014] In another aspect of the present application, a circuit breaker is provided, comprising a base, an operating mechanism and a trip structure; the operating mechanism and the trip structure are arranged on the mounting surface of the base, and the trip structure is oppositely arranged with the operating mechanism; the trip structure is driven to move towards the operating mechanism, so that the operating mechanism is unlocked, and the circuit breaker is tripped.

[0015] The beneficial effects of the present application include: The application provides a tripping structure, comprising a pushing piece, a thermal tripping piece and an electromagnetic tripping assembly which are arranged in cooperation with the pushing piece respectively; the pushing piece comprises a first driving surface and a second driving surface which are arranged at intervals; the electromagnetic tripping assembly comprises a push rod; the deformed end of the thermal tripping piece is arranged on the side of the first driving surface away from the second driving surface; the push rod and the deformed end of the thermal tripping piece drive the pushing piece to move independently through the first driving surface respectively, and the second driving surface is used for driving the unlocking of an operating mechanism, which not only ensures that the driving forces of the electromagnetic tripping and the thermal tripping can act on the same surface of the pushing piece respectively, but also can output the driving force to the operating mechanism uniformly through the second driving surface, realizes single-path transmission, and improves the transmission synchronization when multiple tripping occurs; through the position setting of the pushing piece, the driving forces of the thermal tripping piece and the electromagnetic tripping assembly can be directly transmitted to the operating mechanism through the pushing piece, compared with the existing two-stage transmission setting, the tripping structure of the application reduces the transmission links, reduces the transmission loss, and improves the transmission efficiency of the driving force. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The structure diagram of the open state of the circuit breaker is provided for the embodiments of the application. Figure 2 The structure diagram of the closed state of the circuit breaker is provided for the embodiments of the application. Figure 3 The structure diagram of the pushing piece of the tripping structure is provided for the embodiments of the application. Figure 4 The enlarged view of the details at A is provided. Figure 5 The assembly diagram of the pushing piece and the electromagnetic tripping assembly is provided for the embodiments of the application. Figure 6 The structure diagram of the magnetic yoke of the tripping structure is provided for the embodiments of the application.

[0018] Icon: 110 - pushing piece; 111 - first driving surface; 1111 - through hole; 112 - second driving surface; 113 - mounting groove; 1131 - first abutting portion; 114 - contact rod; 115 - second abutting portion; 1151 - first abutting surface; 1152 - mounting column; 120 - thermal trip piece; 130 - electromagnetic trip assembly; 131 - push rod; 132 - core assembly; 133 - magnetic yoke; 1331 - bottom plate; 1331A - second limiting groove; 1332 - limiting plate; 1332A - first limiting groove; 1332B - third limiting groove; 140 - reset piece; 200 - circuit breaker; 201 - base; 2011 - second abutting surface; 210 - operating mechanism; 211 - movable contact assembly; 212 - jump buckle; 213 - lock buckle. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0022] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0023] Please refer to Figure 1 , Figure 2 and Figure 3 , the embodiment provides a tripping structure, comprising a pushing piece 110, a thermal tripping piece 120 and an electromagnetic tripping assembly 130 arranged in cooperation with the pushing piece 110 respectively; the pushing piece 110 comprises a first driving surface 111 and a second driving surface 112 arranged at intervals; the electromagnetic tripping assembly 130 comprises a push rod 131; the deformed end of the thermal tripping piece 120 is arranged on the side of the first driving surface 111 away from the second driving surface 112; the push rod 131 and the deformed end of the thermal tripping piece 120 respectively drive the movement of the pushing piece 110 through the first driving surface 111 independently, and the second driving surface 112 is used to drive the unlocking of the operating mechanism 210.

[0024] Specifically, as shown in Figure 1 and Figure 2 , the tripping structure comprises a thermal tripping piece 120 and an electromagnetic tripping assembly 130, and the pushing piece 110 is arranged between the thermal tripping piece 120 and the operating mechanism 210. The pushing piece 110 comprises a first driving surface 111 and a second driving surface 112, and the second driving surface 112 is arranged between the first driving surface 111 and the operating mechanism 210. The first driving surface 111 is used to receive the driving force provided by the electromagnetic tripping assembly 130 or the thermal tripping piece 120, at this time the pushing piece 110 can be driven by the driving force to move towards the operating mechanism 210, and the driving force is transmitted to the operating mechanism 210 through the second driving surface 112, so that the operating mechanism 210 is unlocked, and the circuit breaker 200 is opened.

[0025] The thermal trip 120 is mainly used to cope with the circuit overload condition, and the thermal trip 120 includes a deformation end which is bent and deformed when the thermal trip 120 is heated due to the circuit overload. The deformation end is arranged on the side of the first driving surface 111 away from the second driving surface 112. On the one hand, when the thermal trip 120 is deformed, the deformation end can directly act on the first driving surface 111, so that the first driving surface 111 is subjected to a force towards the operating mechanism 210. On the other hand, the position is arranged to avoid the deformation end of the thermal trip 120 interfering with the second driving surface 112 and the operating mechanism 210 in space, so as to ensure that the deformation force of the thermal trip 120 can be accurately and unobstructed transmitted to the first driving surface 111, and the smoothness of the thermal trip action is ensured.

[0026] The electromagnetic trip assembly 130 is used to cope with the circuit short circuit condition, and drives the trip structure to move through the electromagnetic force. When the circuit is short-circuited, the electromagnetic trip assembly 130 generates an electromagnetic force to drive the push rod 131 to move, so that the movement of the push rod 131 can directly drive the push piece 110 to move through the first driving surface 111. In this way, the driving force generated by the electromagnetic trip can be more directly and less wasted transmitted to the push piece 110, and the response speed and effectiveness of the driving force of the electromagnetic trip are improved.

[0027] Whether the electromagnetic trip assembly 130 drives the push piece 110 to move towards the operating mechanism 210 through the push rod 131, or the thermal trip 120 drives the push piece 110 to move towards the operating mechanism 210 through the deformation end, both act on the first driving surface 111 of the trip structure, and contact and apply a force to the operating mechanism 210 through the second driving surface 112, so as to drive the operating mechanism 210 to be unlocked. This makes the two trip modes form a unified unlocking driving path, avoids the problems of inconsistent movement and insufficient driving force that may occur in the prior art when multiple trips drive the operating mechanism 210, further ensures the effectiveness and stability of the trip action, and reduces the risk of trip failure.

[0028] It should be noted that, in an embodiment of the present application, first, as shown in Figure 3 The push piece 110 includes a mounting groove 113 and a contact rod 114 connected to each other, one side wall of the mounting groove 113 forms the first driving surface 111, the contact rod 114 is protrudingly arranged on the side of the mounting groove 113 away from the first driving surface 111, and the second driving surface 112 is located at the end of the contact rod 114; and the electromagnetic trip assembly 130 is slidably arranged in the mounting groove 113.

[0029] Specifically, as shown in Figure 3 and Figure 5As shown, the pushing piece 110 is in a rod structure, which includes a mounting groove 113 and a contact rod 114. The mounting groove 113 has opposite two side walls arranged along the axis direction of the push rod 131, and the two side walls and the rod body of the pushing piece 110 form a limiting groove for accommodating the electromagnetic tripping assembly 130, and the electromagnetic tripping assembly 130 is slidably arranged in the mounting groove 113. It should be noted that the sliding arrangement here means relative sliding arrangement, and the setting position of the electromagnetic tripping assembly 130 is fixed, and the pushing piece 110 can move left and right along the axis direction of the push rod 131, so as to realize the relative sliding of the pushing piece 110 and the electromagnetic tripping assembly 130. Through such a setting mode, the structure of the tripping structure can be more compact, and the transverse size of the tripping structure is reduced.

[0030] In order to save production cost and improve the transmission efficiency of driving force, one side wall of the mounting groove 113 forms a first driving surface 111, and the thermal tripping piece 120 or the push rod 131 only needs to drive the pushing piece 110 to move towards the operating mechanism 210 through the side wall of the mounting groove 113, until the end of the contact rod 114 drives the lock catch 213 and the jump catch 212 of the operating mechanism 210 to be unlocked.

[0031] Secondly, as shown in Figure 4 and Figure 5 The pushing piece 110 protrudes a second abutting portion 115, which has a first abutting surface 1151 arranged towards the operating mechanism 210; the tripping structure further includes a reset piece 140, one end of the reset piece 140 abuts against the first abutting surface 1151, and the other end abuts against a second abutting surface 2011 arranged on the base 201 of the circuit breaker 200; the energy releasing direction of the reset piece 140 is the same as the connecting direction of the first driving surface 111 and the second driving surface 112; the pushing piece 110 is driven to move towards the operating mechanism 210, the first abutting surface 1151 compresses the reset piece 140 towards the second abutting surface 2011, and the reset piece 140 stores energy under stress; after the circuit breaker 200 is opened, the reset piece 140 releases energy to drive the pushing piece 110 to reset through the first abutting surface 1151.

[0032] Specifically, in order to further improve the tripping efficiency and tripping reliability, the tripping structure further includes a reset piece 140 for providing a reset force to the pushing piece 110. The bottom of the pushing piece 110 protrudes a second abutting portion 115, which has an abutting surface for abutting against the reset piece 140; correspondingly, the base 201 of the circuit breaker 200 protrudes a second abutting surface 2011, so that the connecting direction of the second abutting surface 2011 and the first abutting surface 1151 is the same as the movement direction of the pushing piece 110; The two ends of the reset member 140 abut against the first abutting surface 1151 and the second abutting surface 2011 respectively, when the pushing member 110 is driven to move towards the operating mechanism 210, the first abutting surface 1151 moves towards the second abutting surface 2011 to gradually reduce the distance between the first abutting surface 1151 and the second abutting surface 2011. In this process, the reset member 140 gradually stores energy until the second driving surface 112 drives the operating mechanism 210 to be unlocked, and the circuit breaker 200 is tripped. After the circuit breaker 200 is tripped, the reset member 140 releases energy to drive the second abutting part 115 to reset the pushing member 110, preparing for the next tripping.

[0033] Further, in order to avoid the reset member 140 from falling off between the first abutting surface 1151 and the second abutting surface 2011 in the state of not being stressed, in an embodiment of the present application, a containing groove is arranged on the base 201, the extension direction of the containing groove is the same as the energy releasing direction of the reset member 140, and the second abutting surface 2011 is located at the groove bottom of the containing groove. Through such arrangement, the containing groove can support and limit the reset member 140 to avoid falling off.

[0034] Further, in order to further improve the installation stability of the reset member 140, as shown in FIG. 1, the first abutting surface 1151 is provided with a mounting column 1152 towards the second abutting surface 2011, and the end of the reset member 140 is sleeved on the outer periphery of the mounting column 1152. Similarly, the second abutting surface 2011 can also be provided with a mounting column 1152 to further improve the installation stability of the reset member 140. Figure 4

[0035] The present application provides a tripping structure, comprising a pushing member 110, a thermal tripping member 120 and an electromagnetic tripping assembly 130 arranged in cooperation with the pushing member 110 respectively; the pushing member 110 comprises a first driving surface 111 and a second driving surface 112 arranged at intervals; the electromagnetic tripping assembly 130 comprises a push rod 131; the deformed end of the thermal tripping member 120 is arranged on the side of the first driving surface 111 away from the second driving surface 112; the push rod 131 and the deformed end of the thermal tripping member 120 respectively drive the pushing member 110 to move through the first driving surface 111 independently, and the second driving surface 112 is used to drive the operating mechanism 210 to be unlocked, which not only ensures that the driving forces of electromagnetic tripping and thermal tripping can act on the same surface of the pushing member 110 respectively, but also can output driving force to the operating mechanism 210 uniformly through the second driving surface 112, realizing single-path transmission and improving the transmission synchronization in multi-stage tripping; through the position setting of the pushing member 110, the driving forces of the thermal tripping member 120 and the electromagnetic tripping assembly 130 can be directly transmitted to the operating mechanism 210 through the pushing member 110, compared with the existing two-stage transmission arrangement, the tripping structure of the present application reduces the transmission links, reduces the transmission loss, and improves the transmission efficiency of the driving force.​

[0036] As shown in Figure 5 and Figure 6 , the electromagnetic tripping assembly 130 includes a core assembly 132 and a magnetic yoke 133 sleeved outside the core assembly 132, one end of the push rod 131 is arranged in the core assembly 132, the other end extends outside the core assembly 132 and penetrates the first driving surface 111; the magnetic yoke 133 includes a bottom plate 1331 and limiting plates 1332 vertically arranged on opposite sides of the bottom plate 1331 respectively, the limiting plates 1332 are arranged parallel to the first driving surface 111 and the second driving surface 112 respectively; the push rod 131 drives the pusher 110 to move along the axis direction of the push rod 131 through the first driving surface 111, so that the two side walls of the mounting groove 113 abut against the two limiting plates 1332 of the magnetic yoke 133 respectively.

[0037] Specifically, the core assembly 132 is the core execution component of electromagnetic tripping, when strong current is generated due to circuit short circuit, axial movement will be generated under the action of magnetic field, directly driving the push rod 131 to act; the magnetic yoke 133 is sleeved outside the core assembly 132, on the one hand, it can enhance the magnetic field strength around the core assembly 132 through its magnetic conductive property, improve the output efficiency of electromagnetic driving force, and ensure that the core assembly 132 can respond quickly when short circuit occurs; on the other hand, the magnetic yoke 133 provides a stable installation reference and structural protection for the core assembly 132, avoiding the position deviation of the core assembly 132 due to external vibration or impact, and ensuring the stability of electromagnetic tripping action.

[0038] As shown in Figure 5 and Figure 6 , one end of the push rod 131 is arranged in the core assembly 132, so that the axial movement of the core assembly 132 can be directly transmitted to the push rod 131; the other end of the push rod 131 penetrates the first driving surface 111, so that the movement of the push rod 131 can directly act on the first driving surface 111, without the need for additional intermediate transmission parts, further shortening the force transmission path of electromagnetic tripping, compared with the multi-stage transmission design in the prior art, the response speed of electromagnetic tripping is greatly improved, ensuring that the pusher 110 can be triggered to act in a very short time when short circuit occurs.

[0039] As shown in Figure 5 and Figure 6 , the magnetic yoke 133 includes a bottom plate 1331 and limiting plates 1332 vertically arranged on opposite sides of the bottom plate 1331 respectively, the limiting plates 1332 are arranged parallel to the first driving surface 111 and the second driving surface 112 respectively, and the bottom plate 1331 and the two limiting plates 1332 together form a containing cavity for accommodating the core assembly 132.

[0040] It should be noted that in order to ensure that the pushing piece 110 can slide relative to the electromagnetic tripping assembly 130, the width of the mounting groove 113 of the pushing piece 110 should be greater than the width between the two limiting plates 1332 of the magnetic yoke 133, and the width direction is the same as the direction of the connecting line of the two limiting plates 1332. That is, the magnetic yoke 133 arranged in the mounting groove 113 should provide sufficient movement space for the pushing piece 110, so that the pushing piece 110 can drive the second driving surface 112 to cooperate with the lock catch 213 of the operating mechanism 210 to be unlocked.

[0041] The two limiting plates 1332 can also provide a certain limiting effect for the pushing piece 110. The pushing piece 110 can move a preset stroke until the two side walls of the mounting groove 113 abut against the adjacent limiting plates 1332, so that the movement stroke of the pushing piece 110 is more accurate, and the possibility of the pushing piece 110 moving too much towards the operating mechanism 210 and falling off from the base 201 or interfering with the tripping process is avoided.

[0042] Optionally, as shown in Figure 5 and Figure 6 , the side of the limiting plate 1332 facing the bottom plate 1331 is provided with a first limiting groove 1332A, and the groove bottom of the mounting groove 113 is at least partially clamped in the first limiting groove 1332A in the width direction, which is perpendicular to the axis direction of the push rod 131.

[0043] Specifically, as shown in Figure 5 and Figure 6 , the side of the limiting plate 1332 facing the bottom plate 1331 is provided with a first limiting groove 1332A, and in order to facilitate the installation of the pushing piece 110 in the first limiting groove 1332A, one end of the first limiting groove 1332A has an outward opening. The groove bottom of the mounting groove 113 is at least partially clamped in the first limiting groove 1332A in the width direction and can slide along the connecting line direction of the two first limiting grooves 1332A. Such a setting mode can limit the movement direction of the pushing piece 110, and further improve the movement stability and driving accuracy of the pushing piece 110, avoiding the shaking of the pushing piece 110 during the driven movement, which leads to the failure of unlocking the operating mechanism 210.

[0044] Optionally, as shown in Figure 5 and Figure 6 , the groove bottom of the mounting groove 113 is provided with a first abutting portion 1131 on the side away from the core assembly 132, the bottom plate 1331 of the magnetic yoke 133 is provided with a second limiting groove 1331A corresponding to the first abutting portion 1131, the first abutting portion 1131 is arranged in the second limiting groove 1331A, and the side wall of the first abutting portion 1131 can abut against the inner wall of the second limiting groove 1331A; when the pushing piece 110 moves along the axis direction of the push rod 131, the first abutting portion 1131 can slide along the inner wall of the second limiting groove 1331A.

[0045] Specifically, as shown in Figure 5 and Figure 5 , the groove bottom of the mounting groove 113 is provided with a first abutting portion 1131 facing away from one side of the core assembly 132, and the bottom plate 1331 of the magnetic yoke 133 is provided with a second limiting groove 1331A corresponding to the first abutting portion 1131, the second limiting groove 1331A has a predetermined width, so that the first abutting portion 1131 arranged in the second limiting groove 1331A can slide relative to the second limiting groove 1331A, ensuring that the pushing piece 110 can move reliably; at the same time, the side wall of the first abutting portion 1131 can abut with the inner wall of the second limiting groove 1331A, further improving the stability of the movement process of the pushing piece 110. Preferably, as shown in Figure 6 , the first abutting portion 1131 is in an L-shaped structure, which includes a vertical plate and a horizontal plate arranged vertically. When the first abutting portion 1131 is provided with the second limiting groove 1331A, the horizontal plate can be connected with the surface of the bottom plate 1331 of the magnetic yoke 133, further improving the movement stability of the pushing piece 110.

[0046] Optionally, as shown in Figure 5 and Figure 1 , the limiting plate 1332 of the magnetic yoke 133 is provided with a third limiting groove 1332B, and the third limiting grooves 1332B of the two limiting plates 1332 are oppositely arranged; one of the third limiting grooves 1332B is used for penetrating the push rod 131, and the other third limiting groove 1332B is used for clamping the end of the core assembly 132.

[0047] Specifically, the limiting plate 1332 of the magnetic yoke 133 is provided with a third limiting groove 1332B, and preferably, the third limiting groove 1332B is an arc-shaped groove in communication with the outside, so as to facilitate the installation of the push rod 131 and the core assembly 132. Since the magnetic yoke 133 has two oppositely arranged limiting plates 1332, the two third limiting grooves 1332B are also oppositely arranged. One of the third limiting grooves 1332B is used for penetrating the push rod 131, and the other third limiting groove 1332B is used for clamping the end of the core assembly 132, improving the connection stability of the core assembly 132 and the magnetic yoke 133.

[0048] Optionally, as shown in Figure 2 , in order to further improve the driving stability of the pushing piece 110, the first driving surface 111 is provided with a through hole 1111, and the push rod 131 penetrates the through hole 1111; the end of the push rod 131 is provided with a limiting table, and the outer diameter of the limiting table is greater than the inner diameter of the through hole 1111, so as to avoid the push rod 131 from falling off from the through hole 1111 when driving the pushing piece 110 to move.

[0049] Another aspect of the present application provides a circuit breaker 200, comprising a base 201, an operating mechanism 210 and a tripping structure; the operating mechanism 210 and the tripping structure are arranged on a mounting surface of the base 201, and the tripping structure is arranged opposite to the operating mechanism 210; the tripping structure is driven to move towards the operating mechanism 210, so as to unlock the operating mechanism 210, and the circuit breaker 200 is tripped.

[0050] Specifically, as shown in ​ and ​ the operating mechanism 210 comprises a movable contact assembly 211, a trip latch 212 and a lock latch 213, the trip latch 212 is connected with the movable contact assembly 211, and the lock latch 213 is buckled with the trip latch 212. The first driving surface 111 of the tripping structure is driven to move towards the operating mechanism 210, so as to drive the second driving surface 112 to rotate along the axial direction and unlock the trip latch 212, at this time, the movable contact of the movable contact assembly 211 is separated from the static contact of the circuit breaker 200, and the circuit breaker 200 is tripped. Wherein, the specific structure and beneficial effects of the tripping structure have been described in detail above, and will not be repeated here.

[0051] The circuit breaker 200 described above can directly transmit the driving force applied to the push piece 110 to the operating mechanism 210 through the arrangement of the tripping structure, compared with the existing two-stage transmission arrangement, the circuit breaker 200 of the present application reduces the arrangement of the transmission assembly, improves the transmission efficiency of the driving force and the transverse size of the circuit breaker 200; since the circuit breaker 200 can directly realize tripping through the push piece 110, even if the multi-stage circuit breaker 200 is tripped synchronously, the synchronism of multi-stage tripping can be ensured.

[0052] The above only describes optional embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0053] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A trip structure characterized by, The pusher (110) includes a first driving surface (111) and a second driving surface (112) arranged at intervals; the electromagnetic tripping assembly (130) includes a push rod (131); the deformed end of the thermal tripping piece (120) is arranged on the side of the first driving surface (111) away from the second driving surface (112); the push rod (131) and the deformed end of the thermal tripping piece (120) independently drive the pusher (110) to move through the first driving surface (111) respectively, and the second driving surface (112) is used for driving an operating mechanism (210) to be unlocked.

2. The trip structure of claim 1, wherein, The pusher (110) includes a first driving surface (111) and a second driving surface (112) arranged at intervals; the electromagnetic tripping assembly (130) includes a push rod (131); the deformed end of the thermal tripping piece (120) is arranged on the side of the first driving surface (111) away from the second driving surface (112); the push rod (131) and the deformed end of the thermal tripping piece (120) independently drive the pusher (110) to move through the first driving surface (111) respectively, and the second driving surface (112) is used for driving an operating mechanism (210) to be unlocked.

3. The trip structure of claim 2, wherein, The electromagnetic tripping assembly (130) includes an iron core assembly (132) and a magnetic yoke (133) sleeved outside the iron core assembly (132), one end of the push rod (131) is arranged in the iron core assembly (132), and the other end extends outside the iron core assembly (132) and penetrates the first driving surface (111); the magnetic yoke (133) includes a bottom plate (1331) and limiting plates (1332) vertically arranged on opposite sides of the bottom plate (1331) respectively, the limiting plates (1332) are arranged in parallel with the first driving surface (111) and the second driving surface (112) respectively; the push rod (131) drives the pusher (110) to move along the axis direction of the push rod (131) through the first driving surface (111), so that the two side walls of the mounting groove (113) are respectively abutted with the two limiting plates (1332) of the magnetic yoke (133).

4. The trip structure of claim 3, wherein, The side of the limiting plate (1332) facing the bottom plate (1331) is provided with a first limiting groove (1332A), and the groove bottom of the mounting groove (113) is at least partially clamped in the first limiting groove (1332A) in the width direction, and the width direction is perpendicular to the axis direction of the push rod (131).

5. The trip structure of claim 3 or 4, wherein, The bottom of the mounting groove (113) is provided with a first abutting portion (1131) facing away from one side of the core assembly (132), the bottom plate (1331) of the magnetic yoke (133) is provided with a second limiting groove (1331A) corresponding to the first abutting portion (1131), the first abutting portion (1131) is arranged in the second limiting groove (1331A), and the side wall of the first abutting portion (1131) can abut against the inner wall of the second limiting groove (1331A); when the ejector (110) moves along the axis direction of the push rod (131), the first abutting portion (1131) can slide along the inner wall of the second limiting groove (1331A).

6. The trip structure of claim 3 wherein, The limiting plate (1332) of the magnetic yoke (133) is provided with a third limiting groove (1332B), and the third limiting grooves (1332B) of the two limiting plates (1332) are oppositely arranged; one of the third limiting grooves (1332B) is used for penetrating the push rod (131), and the other third limiting groove (1332B) is used for clamping the end of the core assembly (132).

7. The trip structure of claim 2, wherein, The first driving surface (111) is provided with a through hole (1111), and the push rod (131) penetrates the through hole (1111); the end of the push rod (131) is provided with a limiting table, and the outer diameter of the limiting table is greater than the inner diameter of the through hole (1111).

8. The trip structure of claim 1, wherein, The ejector (110) is provided with a second abutting portion (115), and the second abutting portion (115) has a first abutting surface (1151) facing the operating mechanism (210); the trip structure further comprises a reset member (140), one end of the reset member (140) abuts against the first abutting surface (1151), and the other end abuts against a second abutting surface (2011) provided on the base (201) of the circuit breaker (200); the energy release direction of the reset member (140) is the same as the connecting direction of the first driving surface (111) and the second driving surface (112); the ejector (110) is driven to move towards the operating mechanism (210), the first abutting surface (1151) compresses the reset member (140) towards the second abutting surface (2011), and the reset member (140) stores energy under stress; after the circuit breaker (200) is opened, the reset member (140) releases energy to drive the ejector (110) to reset through the first abutting surface (1151).

9. The trip structure of claim 8, wherein, The first abutting surface (1151) is provided with a mounting column (1152) facing the second abutting surface (2011), and the end of the reset member (140) is sleeved on the outer periphery of the mounting column (1152).

10. A circuit breaker characterized by, The circuit breaker (200) comprises a base (201), an operating mechanism (210) and the trip structure according to any one of claims 1-9; the operating mechanism (210) and the trip structure are arranged on a mounting surface of the base (201), the trip structure is arranged opposite to the operating mechanism (210); the trip structure is driven to move towards the operating mechanism (210), so that the operating mechanism (210) is unlocked, and the circuit breaker (200) is tripped.

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