Tripping assembly and circuit breaker

Abstract

The utility model discloses a tripping assembly and a circuit breaker, and relates to the technical field of circuit breakers, the circuit breaker comprises a tripping mechanism and a contact mechanism which are connected, the tripping mechanism comprises a lock catch and a jump pin, the contact mechanism comprises a moving contact and a static contact, when the circuit breaker is in a closed state, the lock catch and the jump pin are relatively locked, and the static contact is locked. And the moving contact is in contact with the static contact. The tripping assembly comprises an armature, the armature is provided with a pushing structure, the lock catch is provided with a first bearing part, and the moving contact is provided with a second bearing part. When the tripping assembly triggers tripping, the armature pushes the first bearing part and the second bearing part through the pushing structure, so that the lock catch and the jump pin are relatively unlocked, and the moving contact is separated from the static contact. According to the tripping assembly and the circuit breaker provided by the invention, the reliability of cutting off the circuit by the circuit breaker when the circuit is abnormal can be improved, and the risk of electric appliance accidents caused by untimely cutting off is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a tripping assembly and a circuit breaker. BACKGROUND

[0002] The circuit breaker can be closed, carried and opened under normal circuit conditions, and can quickly and accurately cut off the fault circuit to avoid electrical accidents when the circuit is overloaded, short-circuited or other abnormal conditions.

[0003] The existing circuit breaker usually includes a moving contact, a static contact, an electromagnetic tripping device and a tripping mechanism. When the circuit breaker is in the closed state, the moving contact is in contact with the static contact to conduct the circuit. When the circuit of the circuit breaker appears abnormal, the electromagnetic tripping device can respond in time according to the current change on the static contact to drive the tripping mechanism to unlock, and drive the moving contact and the static contact to separate through the tripping mechanism, so as to achieve the purpose of quickly cutting off the circuit.

[0004] However, when the circuit appears abnormal such as short circuit, only the cooperation of the electromagnetic tripping device and the tripping mechanism to cut off the circuit exists the problem of slow response speed or not responding, which reduces the on-off performance of the circuit breaker and easily causes the circuit breaker to fail to cut off the circuit in time. Utility model content

[0005] The purpose of the present application is to provide a tripping assembly and a circuit breaker, which can improve the reliability of the circuit breaker in cutting off the circuit when the circuit is abnormal, and reduce the risk of electrical accidents due to delayed disconnection.

[0006] In a first aspect, the present application provides a tripping assembly applied to a circuit breaker, the circuit breaker comprising a tripping mechanism and a contact mechanism connected with each other, the tripping mechanism comprising a lock catch and a trip catch, the contact mechanism comprising a moving contact and a static contact, the circuit breaker being in a closed state, the lock catch being locked with the trip catch, and the moving contact being in contact with the static contact. The tripping assembly comprises an armature, the armature being provided with a pushing structure, the lock catch being provided with a first receiving part, and the moving contact being provided with a second receiving part. When the tripping assembly is triggered to trip, the armature pushes the first receiving part and the second receiving part through the pushing structure, so that the lock catch is unlocked with the trip catch, and the moving contact is separated from the static contact.

[0007] Based on the above-mentioned embodiments of the present application, by arranging the first receiving part on the lock catch, the second receiving part on the movable contact, and the corresponding pushing structure on the armature, when the trip assembly triggers tripping, the pushing structure can simultaneously push the first receiving part and the second receiving part, so that the tripping mechanism and the contact mechanism synchronously perform the action of breaking the circuit, ensuring that the movable contact and the static contact can timely and accurately break the circuit. Compared with the setting form in which the trip assembly only controls the contact mechanism to break through the tripping mechanism, the embodiment effectively improves the reliability of the circuit breaker breaking, which is conducive to improving the use safety of the circuit and the equipment.

[0008] In some examples, the pushing structure includes a first pushing part and a second pushing part, the first pushing part and the second pushing part are arranged in a spaced manner, the first pushing part is located on the side of the armature close to the lock catch, and the second pushing part is located on the side of the armature close to the movable contact.

[0009] Based on the above-mentioned embodiments of the present application, by arranging the first pushing part corresponding to the first receiving part and the second pushing part corresponding to the second receiving part, the lock catch and the movable contact can be driven separately when the armature acts, so that the armature can accurately apply force to the lock catch and the movable contact respectively, ensuring that the lock catch and the movable contact can timely and accurately realize the breaking process of the circuit breaker, which is conducive to improving the reliability of the circuit breaker breaking.

[0010] In some examples, the first pushing part is provided with a first pushing surface, the first receiving part is provided with a first receiving surface, the first pushing surface is arranged as a plane, the first receiving surface is arranged as an arc surface, and the first pushing surface can be tangent to the first receiving surface.

[0011] Based on the above-mentioned embodiments of the present application, by arranging the first pushing surface as a plane and the first receiving surface as an arc surface, the first pushing part and the first receiving part always maintain a tangent state during the process of the first pushing part pushing the first receiving part. In this way, the contact point can be constantly changed during the pushing process without affecting the force applied by the first pushing part to the first receiving part, preventing the first pushing part and the first receiving part from being stuck, ensuring that the lock catch and the trip catch can be smoothly unlocked, and being conducive to improving the reliability of the cooperation between the trip assembly and the tripping mechanism.

[0012] In some examples, the second pushing part is provided with a second pushing surface, the second receiving part is provided with a second receiving surface, the second pushing surface is arranged as a plane or an arc surface, the second receiving surface is arranged as an arc surface, and the second pushing surface can be tangent to the second receiving surface.

[0013] Based on the above-mentioned embodiments of the present application, the second pushing surface and the second receiving surface are arranged in the same way as the first pushing surface and the first receiving surface, so that the second pushing part and the second receiving part always remain tangent during the process of the second pushing part pushing the second receiving part. While not affecting the force of the second pushing part on the second receiving part, the contact point can be constantly changed during the pushing process, preventing the second pushing part from being stuck with the second receiving part, and ensuring that the movable contact can be smoothly separated from the static contact.

[0014] In some examples, the first pushing part includes a first folded plate and a second folded plate connected together, and the included angle between the first folded plate and the second folded plate is obtuse. The second pushing part includes a third folded plate and a fourth folded plate connected together, and the included angle between the third folded plate and the fourth folded plate is obtuse.

[0015] Based on the above-mentioned embodiments of the present application, by arranging the first folded plate and the second folded plate connected together and having an obtuse angle therebetween, the first pushing part can be extended to a position close to the first receiving part, which is beneficial to reduce the idle stroke of the first pushing part before pushing the first receiving part, thereby improving the accuracy of driving the lock catch by the armature until the lock catch is unlocked relative to the trip catch.

[0016] In some examples, the armature is rotationally connected to the first preset position, the lock catch is rotationally connected to the second preset position, and the movable contact is rotationally connected to the third preset position. In the closed state of the circuit breaker, the first receiving part is located in the rotational path of the first pushing part, and the second receiving part is located in the rotational path of the second pushing part.

[0017] Based on the above-mentioned embodiments of the present application, the armature is rotationally connected to the first preset position, so that the armature can drive the movable contact and the lock catch, which are also rotationally arranged, during rotation by the first pushing part and the second pushing part. Compared with the linear pushing method, the present embodiment can reduce the possibility of jamming or incomplete pushing, and ensure that the lock catch and the movable contact can be timely driven to be unlocked by the trip unit, thereby improving the accuracy of the breaking performance of the circuit breaker.

[0018] In some examples, the trip unit further includes a bracket and a magnetic yoke, the magnetic yoke is mounted on the bracket, the first preset position is arranged on the bracket, and the armature is rotationally connected to the bracket on the side away from the pushing structure. The magnetic yoke can attract the armature to rotate the armature.

[0019] Based on the above-mentioned embodiments of the present application, the armature and the magnetic yoke are arranged on the bracket, and the bracket, the magnetic yoke, and the armature are important components of the electromagnetic trip unit. When the circuit is abnormal, the magnetic yoke can exert a magnetic field force on the armature to make the armature rotate around the first preset position on the bracket, thereby pushing the lock catch and the movable contact to rotate by the pushing structure. This kind of cooperation is simple and efficient, and can accurately and timely control the trip mechanism and the contact mechanism according to the current situation, thereby improving the accuracy of the control breaking of the circuit breaker.

[0020] In a second aspect, the embodiments of the present application further provide a circuit breaker, comprising a housing, a tripping mechanism, a contact mechanism and the above-mentioned tripping assembly, the tripping mechanism, the contact mechanism and the tripping assembly are all arranged in the housing.

[0021] Based on the above-mentioned embodiments of the present application, the housing serves as the main body bearing the tripping mechanism, the contact mechanism and the tripping assembly, and can stably support the aforementioned components to ensure accurate cooperation between the aforementioned components. By arranging the tripping assembly to simultaneously drive the tripping mechanism and the contact mechanism, when an abnormality occurs in the circuit where the circuit breaker is located, the tripping assembly can simultaneously drive the tripping mechanism to trip and the contact mechanism to separate, thereby ensuring that the circuit breaker can timely and accurately cut off the circuit.

[0022] In some examples, the first preset position and the second preset position are arranged at intervals, and the distance between the first preset position and the bottom wall of the housing is less than the distance between the second preset position and the bottom wall of the housing, and the arrangement direction of the tripping assembly is from the first preset position to the second preset position.

[0023] Based on the above-mentioned embodiments of the present application, the position relationship between the first preset position and the second preset position requires the tripping assembly to be arranged in an inclined state, which can make the armature close to the lock catch, facilitate the cooperation between the armature and the lock catch, and also increase the size of the magnetic yoke to some extent, thereby facilitating the magnetic yoke to provide sufficient magnetic field force to the armature, so that the armature can timely rotate and can exert sufficient pushing force on the lock catch to unlock the lock catch from the trip catch.

[0024] In some examples, the first preset position and the third preset position are arranged at intervals, and the distance between the first preset position and the bottom wall of the housing is less than the distance between the third preset position and the bottom wall of the housing, and the arrangement direction of the tripping assembly is from the first preset position to the third preset position.

[0025] Based on the above-mentioned embodiments of the present application, the position relationship between the first preset position and the third preset position is similar to the position relationship in the above-mentioned embodiments, and both require the tripping assembly to be arranged in an inclined state, which can facilitate the cooperation between the armature and the movable contact while increasing the pushing force of the armature on the movable contact, thereby facilitating the timely separation of the movable contact from the static contact. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0027] Figure 1 An exploded view of the circuit breaker provided in the embodiments of the present application.

[0028] Figure 2 A combined state schematic view of the trip assembly, the trip mechanism and the contact mechanism provided in the embodiments of the present application.

[0029] Figure 3 Another view of the circuit breaker provided in the embodiments of the present application. Figure 2

[0030] Figure 4 A structure schematic view of the armature provided in the embodiments of the present application.

[0031] Figure 5 A schematic view of the trip assembly cooperating with the trip mechanism and the contact mechanism during the action process of the trip assembly provided in the embodiments of the present application.

[0032] Figure 6 A schematic view of the trip assembly cooperating with the trip mechanism and the contact mechanism after the action of the trip assembly is completed provided in the embodiments of the present application.

[0033] Figure 7 A schematic view of the setting position and the cooperation relationship of the armature, the movable contact and the lock in the housing provided in the embodiments of the present application.

[0034] Explanation of reference signs:

[0035] 100, circuit breaker; 101, housing; 102, first preset position; 103, second preset position; 104, third preset position; 1, trip assembly; 11, armature; 111, pushing structure; 112, main body part; 1111, first pushing part; 1112, second pushing part; 1113, first pushing surface; 1114, second pushing surface; 1115, first turning plate; 1116, second turning plate; 1117, third turning plate; 1118, fourth turning plate; 12, bracket; 13, magnetic yoke; 2, trip mechanism; 21, lock; 211, first receiving part; 212, first receiving surface; 22, jump lock; 3, contact mechanism; 31, movable contact; 311, second receiving part; 312, second receiving surface; 32, static contact. DETAILED DESCRIPTION

[0036] 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.

[0037] ​Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0038] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the application, it should be noted that the positions or location relationships indicated by the terms "in", "out" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the application are used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0040] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0041] The electromagnetic release is usually provided in the circuit breaker, and when abnormal conditions such as overloading or short circuit of the circuit occur, the electromagnetic release can quickly drive the release mechanism of the circuit breaker to release, drive the contact mechanism of the circuit breaker to open through the release mechanism, and thereby cut off the fault circuit to avoid electrical accidents.

[0042] However, in the existing circuit breaker, the tripping of the circuit breaker is triggered only by the cooperation of the electromagnetic release and the release mechanism, which is easily affected by factors such as assembly error or unstable structure, resulting in inaccurate and timely cutting off of the abnormal circuit, thereby affecting the use safety of the circuit and the equipment.

[0043] Based on this, the embodiments of the application provide a release assembly and a circuit breaker, which can improve the reliability of the circuit breaker in cutting off the circuit when the circuit is abnormal, and reduce the risk of electrical accidents due to untimely disconnection.

[0044] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0045] Figure 1 The exploded view of the circuit breaker provided by the embodiments of the present application. Figure 2 The combined state schematic diagram of the trip assembly, the trip mechanism and the contact mechanism provided by the embodiments of the present application. Refer to Figure 1 and Figure 2 The embodiments of the present application provide a circuit breaker 100, which comprises a shell 101, a trip mechanism 2, a contact mechanism 3 and a trip assembly 1, wherein the trip mechanism 2, the contact mechanism 3 and the trip assembly 1 are all arranged in the shell 101.

[0046] The shell 101 serves as the main body for bearing the trip mechanism 2, the contact mechanism 3 and the trip assembly 1, and can stably support the aforementioned components so as to enable accurate cooperation between the aforementioned components. By arranging the trip assembly 1 as a structure capable of driving the trip mechanism 2 and the contact mechanism 3, when an abnormality occurs in the circuit in which the circuit breaker 100 is arranged, the trip assembly 1 can drive the trip mechanism 2 to trip and the contact mechanism 3 to break, thereby ensuring that the circuit breaker 100 can timely and accurately cut off the circuit.

[0047] Specifically, in the circuit breaker 100, the trip mechanism 2 is generally connected with the contact mechanism 3, and when the trip assembly 1 drives the trip mechanism 2 to act, the trip mechanism 2 can drive the contact mechanism 3 to act synchronously. The trip mechanism 2 generally comprises a lock catch 21 and a trip catch 22, and the contact mechanism 3 generally comprises a moving contact 31 and a stationary contact 32. When the circuit breaker 100 is in the closed state, the lock catch 21 is locked relative to the trip catch 22 so as to maintain the contact and conduction of the moving contact 31 and the stationary contact 32.

[0048] The trip assembly 1 is used to drive the lock catch 21 to be unlocked relative to the trip catch 22 and to drive the moving contact 31 to be broken away from the stationary contact 32 when an abnormality occurs in the circuit, so that the separation of the moving contact 31 from the stationary contact 32 is double-protected, thereby ensuring that the circuit can be quickly and accurately broken when the circuit breaker 100 needs to cut off the circuit.

[0049] Refer to Figures 1 to 3 The embodiments of the present application provide a trip assembly 1, which comprises an armature 11, the armature 11 is provided with a pushing structure 111, the lock catch 21 is provided with a first receiving part 211, and the moving contact 31 is provided with a second receiving part 311. When the trip assembly 1 triggers the trip, the armature 11 pushes the first receiving part 211 and the second receiving part 311 through the pushing structure 111, so as to make the lock catch 21 be unlocked relative to the trip catch 22 and make the moving contact 31 be separated from the stationary contact 32.

[0050] Based on the above embodiments of the present application, by providing the first receiving portion 211 on the lock catch 21, the second receiving portion 311 on the movable contact 31, and the corresponding pushing structure 111 on the armature 11, when the trip assembly 1 triggers tripping, the pushing structure 111 can push the first receiving portion 211 to unlock the tripping mechanism 2, and push the second receiving portion 311 to separate the contact mechanism 3. In this way, the tripping mechanism 2 and the contact mechanism 3 can jointly perform the action of breaking the circuit, ensuring that the movable contact 31 and the static contact 32 can timely and accurately break the circuit. Compared with the setting form in which the trip assembly 1 only controls the contact mechanism 3 to break through the tripping mechanism 2, the embodiment effectively improves the reliability of the circuit breaker 100 breaking.

[0051] The trip assembly 1 includes an armature 11, as described above with reference to Figure 2 The armature 11 is provided with a pushing structure 111, which can be configured in the form of a plate structure or a strip structure, etc. In the present embodiment, the pushing structure 111 is configured as a plate structure extending on the end face of the armature 11. The plate structure can have a larger contact area, facilitating the pushing action.

[0052] During the operation of the armature 11, the pushing structure 111 pushes the first receiving portion 211 and the second receiving portion 311, thereby driving the lock catch 21 and the movable contact 31 to operate, to achieve the relative unlocking of the lock catch 21 and the trip catch 22 and the separation of the movable contact 31 and the static contact 32. Further, the pushing structure 111 can be configured as a whole plate structure, or as two independent plate structures, both of which can have a corresponding pushing effect on the first receiving portion 211 and the second receiving portion 311.

[0053] As described above with reference to Figure 2 and Figure 3 The first receiving portion 211 is arranged on the side of the lock catch 21 close to the armature 11, and the second receiving portion 311 is arranged on the side of the movable contact 31 close to the armature 11. The first receiving portion 211 on the lock catch 21 is subjected to a pushing force, causing the lock catch 21 to move in the direction of unlocking the trip catch 22, to achieve the unlocking of the lock catch 21 and the trip catch 22. The second receiving portion 311 on the movable contact 31 is subjected to a pushing force, causing the movable contact 31 to move away from the static contact 32, to achieve the separation of the movable contact 31 and the static contact 32. In this way, when the circuit is abnormal, the contact mechanism 3 can be broken by the tripping mechanism 2, or the circuit can be broken by directly acting on the movable contact 31, effectively improving the breaking capacity and reliability of the circuit breaker 100.

[0054] As described above with reference to Figures 2 to 4In some examples, the pushing structure 111 includes a first pushing part 1111 and a second pushing part 1112, which are arranged in a spaced manner, the first pushing part 1111 is located on the side of the armature 11 close to the lock 21, and the second pushing part 1112 is located on the side of the armature 11 close to the moving contact 31.

[0055] Based on the above-mentioned embodiments of the present application, by arranging the first pushing part 1111 to correspondingly push the first receiving part 211 and arranging the second pushing part 1112 to correspondingly push the second receiving part 311, the movement of the lock 21 and the moving contact 31 can be accurately driven respectively when the trip assembly 1 triggers tripping, so that the movement process between the armature 11 and the lock 21 and the movement process between the armature 11 and the moving contact 31 are relatively independent, ensuring that the lock 21 and the moving contact 31 can timely and accurately perform the breaking process of the circuit breaker 100, which is beneficial to improve the breaking reliability of the circuit breaker 100.

[0056] Specifically, referring to Figure 2 and Figure 4 , the first pushing part 1111 and the second pushing part 1112 are arranged on the side of the armature 11 close to the lock 21 and the moving contact 31. During the movement process of the armature 11, the first pushing part 1111 correspondingly abuts and pushes the first receiving part 211 of the lock 21 until the lock 21 is relatively unlocked with the trip 22. The second pushing part 1112 correspondingly abuts and pushes the second receiving part 311 of the moving contact 31 until the moving contact 31 is separated from the static contact 32.

[0057] The arrangement of the first pushing part 1111 and the second pushing part 1112 can achieve one-to-one driving effect, so that the cooperation process of the armature and the moving contact 31 and the lock 32 can be adjusted according to actual needs, for example, the first pushing part 1111 can push the first receiving part 211 at the same time as the second pushing part 1112 pushes the second receiving part 311, so that the lock 21 and the moving contact 31 move synchronously, and then the trip mechanism 2 and the contact mechanism 3 synchronously perform the breaking process of the circuit.

[0058] Of course, the first pushing part 1111 can first push the first receiving part 211 to make the trip mechanism 2 perform tripping movement first, and then the second pushing part 1112 pushes the second receiving part 311 to make the contact mechanism 3 perform breaking movement. Such arrangement can make the cooperation of the second pushing part 1112 and the second receiving part 311 as a backup mechanism, when the trip mechanism 2 cannot timely drive the contact mechanism 3 to break, the timely breaking of the contact mechanism 3 can be realized through the backup mechanism, thereby effectively improving the breaking reliability of the circuit breaker 100.

[0059] Referring to Figure 3 and Figure 4In some examples, the first pushing surface 1113 is arranged on the first pushing portion 1111, and the first receiving surface 212 is arranged on the first receiving portion 211. The first pushing surface 1113 is arranged as a plane, and the first receiving surface 212 is arranged as a curved surface. The first pushing surface 1113 can be tangent to the first receiving surface 212.

[0060] According to the above-described embodiments, the first pushing surface 1113 is arranged as a plane, and the first receiving surface 212 is arranged as a curved surface. In the process of pushing the first receiving portion 211 by the first pushing portion 1111, the first pushing portion 1111 and the first receiving portion 211 always maintain a tangent state. In this way, the contact point can be changed constantly in the pushing process without affecting the force applied by the first pushing portion 1111 to the first receiving portion 211. This prevents the first pushing portion 1111 and the first receiving portion 211 from being stuck, ensures that the lock catch 21 and the trip catch 22 can be unlocked smoothly, and is beneficial to improving the reliability of the cooperation between the tripping assembly 1 and the tripping mechanism 2.

[0061] With reference to Figure 4 , the first pushing surface 1113 is the surface of the first pushing portion 1111 close to the first receiving portion 211, and the first receiving surface 212 is the surface of the first receiving portion 211 close to the first pushing portion 1111. With reference to Figure 3 , the first receiving surface 212 is arranged as a curved surface, which is the curved surface of the protrusion on the first receiving portion 211. The curved surface is in contact with the first pushing surface 1113 arranged as a plane, which can always maintain a line-surface contact form. This is beneficial to the relative movement between the first pushing surface 1113 and the first receiving surface 212, so as to smoothly push the lock catch 21 to rotate by the first pushing portion 1111, and make the process of pushing the lock catch 21 to be relatively accurate and reliable.

[0062] With reference to Figure 3 and Figure 4 In some examples, the second pushing surface 1114 is arranged on the second pushing portion 1112, and the second receiving surface 312 is arranged on the second receiving portion 311. The second pushing surface 1114 is arranged as a plane or a curved surface, and the second receiving surface 312 is arranged as a curved surface. The second pushing surface 1114 can be tangent to the second receiving surface 312.

[0063] Based on the above embodiments of the present application, the second pushing surface 1114 and the second receiving surface 312 are arranged in the same manner as the first pushing surface 1113 and the first receiving surface 212, so that the second pushing portion 1112 and the second receiving portion 311 always remain tangential during the process of the second pushing portion 1112 pushing the second receiving portion 311. While not affecting the force of the second pushing portion 1112 on the second receiving portion 311, the contact point can be constantly changed during the pushing process, preventing the second pushing portion 1112 and the second receiving portion from being stuck, and ensuring that the movable contact 31 can be smoothly separated from the stationary contact 32.

[0064] Referring to Figure 4 , the second pushing surface 1114 is the surface of the second pushing portion 1112 close to the second receiving portion 311, and the second receiving surface 312 is the surface of the second receiving portion 311 close to the second pushing portion 1112. Among them, referring to Figure 4 , the second receiving surface 312 is also arranged as an arc surface, which is the surface of the arc-shaped protrusion on the second receiving portion 311. The arc surface is in contact with the second pushing surface 1114 arranged as a plane, which can always maintain a line-surface contact form, which is conducive to the relative movement between the second pushing surface 1114 and the second receiving surface 312, so that the second pushing portion 1112 can smoothly push the movable contact 31 to rotate, and the movable contact 31 can be quickly separated from the stationary contact 32.

[0065] The second pushing surface 1114 can also be arranged as an arc surface. The second pushing surface 1114 arranged as an arc surface is in contact with the second receiving surface 312 also arranged as an arc surface, which can also maintain the tangential relationship between the second pushing portion 1112 and the second receiving portion 311 during the operation, so that the second pushing portion 1112 can smoothly push the second receiving portion 311.

[0066] Referring to Figure 3 and Figure 4 , in some examples, the first pushing portion 1111 includes a first folded plate 1115 and a second folded plate 1116 connected together, and the included angle between the first folded plate 1115 and the second folded plate 1116 is an obtuse angle. The second pushing portion 1112 includes a third folded plate 1117 and a fourth folded plate 1118 connected together, and the included angle between the third folded plate 1117 and the fourth folded plate 1118 is an obtuse angle.

[0067] Based on the above embodiments of the present application, by arranging the first folded plate 1115 and the second folded plate 1116 connected together and having an obtuse angle therebetween, the first pushing portion 1111 can extend to a position close to the first receiving portion 211, which is conducive to reducing the idle stroke of the first pushing portion 1111 before pushing the first receiving portion 211, thereby improving the accuracy of the armature 11 driving the lock catch 21 until the lock catch 21 is unlocked relative to the jumper catch 22.

[0068] Similarly, by setting the third and fourth fold plates 1117 and 1118 connected to each other and forming an obtuse angle therebetween, the second pushing part 1112 can be extended to a position close to the second receiving part 311, which is conducive to reducing the idle stroke of the second pushing part 1112 before pushing the second receiving part 311, thereby improving the accuracy of the armature 11 driving the movable contact 31 until the movable contact 31 is completely separated from the static contact 32.

[0069] wherein, referring to Figure 4 , the armature 11 comprises a main body part 112, the first pushing part 1111 is arranged on one side of the main body part 112 close to the lock catch 21, and the second pushing part 1112 is arranged on one side of the main body part 112 close to the movable contact 31.

[0070] On the first pushing part 1111, the first fold plate 1115 is arranged between the main body part 112 and the second fold plate 1116, and the arrangement of the first fold plate 1115 can change the position of the second fold plate 1116 relative to the main body part 112. The first fold plate 1115 is folded towards the position where the first receiving part 211 is located, which can make the arrangement position of the second fold plate 1116 closer to the first receiving part 211. The second fold plate 1116 is used to push the first receiving part 211, and the first pushing surface 1113 is arranged on one side of the second fold plate 1116 facing the first receiving part 211. During the rotation of the armature 11, the first receiving part 211 is pushed by the second fold plate 1116. This arrangement form is simple in structure and effectively improves the cooperation accuracy of the armature 11 and the lock catch 21.

[0071] Similarly, on the second pushing part 1112, the third fold plate 1117 is arranged between the main body part 112 and the fourth fold plate 1118, and the arrangement of the third fold plate 1117 can change the position of the fourth fold plate 1118 relative to the main body part 112. The third fold plate 1117 is folded towards the position where the second receiving part 311 is located, which can make the arrangement position of the fourth fold plate 1118 closer to the second receiving part 311. The fourth fold plate 1118 is used to push the second receiving part 311, and the second pushing surface 1114 is arranged on one side of the fourth fold plate 1118 facing the second receiving part 311. During the rotation of the armature 11, the second receiving part 311 is pushed by the fourth fold plate 1118. The same as the cooperation form described above, it has the same technical effect, which will not be described here.

[0072] Referring to Figure 2 and Figure 3In some examples, the armature 11 is rotationally connected to the first preset position 102, the lock catch 21 is rotationally connected to the second preset position 103, and the movable contact 31 is rotationally connected to the third preset position 104. In the closed state of the circuit breaker 100, the first receiving portion 211 is located on the rotation path of the first pushing portion 1111, and the second receiving portion 311 is located on the rotation path of the second pushing portion 1112.

[0073] Based on the above-described embodiments of the present application, the armature 11 is rotationally connected to the first preset position 102, so that the armature 11 can drive the movable contact 31 and the lock catch 21, which are also rotationally arranged, through the first pushing portion 1111 and the second pushing portion 1112 during rotation. Compared with the linear pushing mode, the present embodiment can reduce the possibility of jamming or incomplete pushing, and ensure that the lock catch 21 and the movable contact 31 can be timely driven to be unlocked by the tripping assembly 1, thereby improving the accuracy of the breaking performance of the circuit breaker 100.

[0074] The first preset position 102 is the mounting position of the armature 11 in the housing 101, and also serves as the rotation center of the armature 11. The first preset position 102 can be configured as a rotating shaft or a rotating shaft hole. The second preset position 103 is the mounting position of the lock catch 21 in the housing 101, and also serves as the rotation center of the lock catch 21. The second preset position 103 can be configured as a rotating shaft or a rotating shaft hole. The third preset position 104 is the mounting position of the movable contact 31 in the housing 101, and also serves as the rotation center of the movable contact 31. The third preset position 104 can be configured as a rotating shaft or a rotating shaft hole.

[0075] Specifically, referring to Figure 2 , the first preset position 102 is arranged on the left side of the second preset position 103 and the third preset position 104. When the tripping assembly 1 triggers tripping, the armature 11 rotates clockwise around the first preset position 102, i.e., the pushing structure 111 rotates clockwise around the first preset position 102. The first receiving portion 211 and the second receiving portion 311 are both located on the rotation path of the pushing structure 111 in the closed state of the circuit breaker 100. The pushing structure 111 can push the first receiving portion 211 to rotate the lock catch 21 counterclockwise around the second preset position 103 until the lock catch 21 is unlocked relative to the trip catch 22. Meanwhile, the pushing structure 111 pushes the second receiving portion 311 to rotate the movable contact 31 around the third preset position 104 until the movable contact 31 is separated from the stationary contact 32.

[0076] Referring to Figures 3 to 6 In some examples, the tripping assembly 1 further includes a bracket 12 and a magnetic yoke 13. The magnetic yoke 13 is mounted on the bracket 12, the first preset position 102 is arranged on the bracket 12, and the armature 11 is rotationally connected to the bracket 12 on the side away from the pushing structure 111. The magnetic yoke 13 can attract the armature 11 to rotate the armature 11.

[0077] Based on the above-mentioned embodiments of the present application, the armature 11 and the magnetic yoke 13 are arranged on the bracket 12, the bracket 12, the magnetic yoke 13 and the armature 11 are important components of the electromagnetic release, and the magnetic yoke 13 can exert a magnetic field force on the armature 11 when an abnormality occurs in the circuit, so that the armature 11 rotates around the first preset position 102 on the bracket 12, thereby pushing the lock catch 21 and the movable contact 31 to rotate through the abutting and pushing structure 111. This cooperation form is simple and efficient, and can accurately and timely control the release mechanism 2 and the contact mechanism 3 according to the current condition, so as to improve the accuracy of the control breaking of the circuit breaker 100.

[0078] Specifically, the bracket 12 is provided with a mounting groove, the first preset position 102 is arranged on the side of the bracket 12 away from the movable contact 31, the magnetic yoke 13 is mounted in the mounting groove, and the side of the armature 11 away from the movable contact 31 is rotationally connected to the first preset position 102, and the armature 11 has a spacing with the magnetic yoke 13.

[0079] When an abnormal current in the circuit flows through the magnetic yoke 13, a magnetic field is generated around the magnetic yoke 13 to provide a magnetic field force on the armature 11, so that the armature 11 rotates around the first preset position 102, and the lock catch 21 and the movable contact 31 are pushed to rotate by the abutting and pushing structure 111 in the rotating process of the armature 11, so as to realize the relative unlocking of the lock catch 21 and the jumper catch 22, and the separation of the movable contact 31 and the static contact 32. This cooperation form has the characteristics of simple structure and efficient cooperation.

[0080] Referring to Figure 2 and Figure 7 In some examples, the first preset position 102 and the second preset position 103 are arranged with a spacing, and the distance between the first preset position 102 and the bottom wall of the shell 101 is less than the distance between the second preset position 103 and the bottom wall of the shell 101, and the setting direction of the release assembly 1 is from the first preset position 102 to the second preset position 103.

[0081] Based on the above-mentioned embodiments of the present application, the first preset position 102 and the second preset position 103 have this positional relationship, so that the release assembly 1 needs to be arranged in an inclined state in the shell 101, which can make the armature 11 close to the lock catch 21, facilitate the cooperation of the armature 11 and the lock catch 21, and also increase the size of the magnetic yoke 13 to some extent, thereby facilitating the magnetic yoke 13 to provide sufficient magnetic field force on the armature 11, so that the armature 11 can rotate in time and can exert sufficient pushing force on the lock catch 21 to relatively unlock the lock catch 21 and the jumper catch 22.

[0082] Specifically, referring to Figure 7The first preset position 102 is located on the left side of the second preset position 103, and the distance between the first preset position 102 and the bottom wall of the shell 101 is the height of the first preset position 102. The distance between the second preset position 103 and the bottom wall of the shell 101 is the height of the second preset position 103. The height of the first preset position 102 is lower than the height of the second preset position 103.

[0083] To ensure that the armature 11 can contact and push the lock catch 21, the trip unit 1 is arranged to be inclined from the first preset position 102 to the second preset position 103, so that the armature 11 extends from the first preset position 102 to the second preset position 103. In this way, the pushing structure 111 on the armature 11 is located close to the lock catch 21, so as to contact and push the lock catch 21 during the rotation of the armature 11.

[0084] At the same time, compared with the horizontally arranged trip unit 1, the size of the inclined trip unit 1 is slightly increased, for example, the length of the magnetic yoke 13 is increased. In this way, the magnetic field generated by the current passing through the magnetic yoke 13 on the magnetic yoke 13 can be increased, so as to increase the magnetic field force acting on the armature 11, and further increase the pushing force of the armature 11 on the lock catch 21. This is beneficial to the quick unlocking of the lock catch 21 and the trip catch 22, and improves the reliability of the cooperation between the trip unit 1 and the trip mechanism 2.

[0085] Referring to Figure 2 and Figure 7 In some examples, the first preset position 102 is arranged to be spaced apart from the third preset position 104, and the distance between the first preset position 102 and the bottom wall of the shell 101 is less than the distance between the third preset position 104 and the bottom wall of the shell 101. The trip unit 1 is arranged to be inclined from the first preset position 102 to the third preset position 104.

[0086] Based on the above-mentioned embodiments of the present application, the positional relationship between the first preset position 102 and the third preset position 104 is similar to that of the above-mentioned embodiments. The inclined trip unit 1 is cooperated to facilitate the cooperation between the armature 11 and the movable contact 31, and to increase the pushing force of the armature 11 on the movable contact 31. This is beneficial to the timely separation of the movable contact 31 and the static contact 32.

[0087] Specifically, referring to Figure 7 , the first preset position 102 is located on the left side of the third preset position 104, and the third preset position 104 is located on the left side of the second preset position 103. The distance between the third preset position 104 and the bottom wall of the shell 101 is the height of the third preset position 104. The height of the first preset position 102 is lower than the height of the third preset position 104.

[0088] Since the second preset position 103 and the third preset position 104 are close, the direction in which the tripping assembly 1 is inclined to be arranged can be the same, and has the same function as the foregoing embodiment, which is beneficial to the plunger 11 to exert sufficient pushing force on the movable contact 31, so that the movable contact 31 is quickly separated from the static contact 32, and the reliability of cooperation between the tripping assembly 1 and the contact mechanism 3 is improved.

[0089] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A trip unit, comprising: The application is applied to a switching device, the switching device comprises a trip mechanism and a contact mechanism, the trip mechanism comprises a lock and a trip, the contact mechanism comprises a movable contact and a static contact, and the lock is locked relative to the trip and the movable contact is in contact with the static contact in a closed state of the switching device; The trip assembly comprises an armature, the armature is provided with a pushing structure, the lock is provided with a first receiving part, and the movable contact is provided with a second receiving part; When the trip assembly triggers tripping, the armature pushes the first receiving part and the second receiving part through the pushing structure, so that the lock is unlocked relative to the trip and the movable contact is separated from the static contact.

2. The trip unit of claim 1, wherein, The pushing structure comprises a first pushing part and a second pushing part, the first pushing part and the second pushing part are arranged at intervals, the first pushing part is located on one side of the armature close to the lock, and the second pushing part is located on one side of the armature close to the movable contact.

3. The trip unit of claim 2, wherein, The first pushing part is provided with a first pushing surface, the first receiving part is provided with a first receiving surface, the first pushing surface is arranged as a plane, and the first receiving surface is arranged as an arc surface, and the first pushing surface can be tangent to the first receiving surface.

4. The trip unit of claim 2, wherein, The second pushing part is provided with a second pushing surface, the second receiving part is provided with a second receiving surface, the second pushing surface is arranged as a plane or an arc surface, and the second receiving surface is arranged as an arc surface, and the second pushing surface can be tangent to the second receiving surface.

5. The trip unit of any of claims 2-4, wherein, The first pushing part comprises a first folded plate and a second folded plate connected to each other, and the included angle between the first folded plate and the second folded plate is an obtuse angle. The second pushing part comprises a third folded plate and a fourth folded plate connected to each other, and the included angle between the third folded plate and the fourth folded plate is an obtuse angle.

6. The trip unit of claim 2, wherein, The armature is rotationally connected to a first preset position, the lock is rotationally connected to a second preset position, and the movable contact is rotationally connected to a third preset position, and in the closed state of the switching device, the first receiving part is located on the rotation path of the first pushing part, and the second receiving part is located on the rotation path of the second pushing part.

7. The trip unit of claim 6, wherein, The trip assembly further comprises a bracket and a magnetic yoke, the magnetic yoke is mounted on the bracket, the first preset position is arranged on the bracket, the armature is rotationally connected to the bracket on the side away from the pushing structure, and the magnetic yoke can attract the armature to make the armature rotate.

8. A circuit breaker characterized by, The switching device comprises a shell, a trip mechanism, a contact mechanism, and a trip assembly as claimed in any one of claims 1-7, and the trip mechanism, the contact mechanism and the trip assembly are arranged in the shell.

9. The circuit breaker of claim 8, wherein, The first preset position and the second preset position are arranged at intervals, the distance between the first preset position and the bottom wall of the shell is smaller than the distance between the second preset position and the bottom wall of the shell, and the setting direction of the trip assembly is from the first preset position to the second preset position.

10. The circuit breaker of claim 8, wherein, The first preset position is arranged at a distance from the third preset position, and the distance between the first preset position and the bottom wall of the shell is smaller than the distance between the third preset position and the bottom wall of the shell. The setting direction of the tripping assembly is from the first preset position to the third preset position.

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