Thermomagnetic release structure

Abstract

The utility model provides a thermomagnetic release structure, which relates to the technical field of circuit breaker related equipment and comprises a conductive mechanism, a movable iron core mechanism and a magnet yoke mechanism. One end of the conductor is connected with the bimetallic element; the movable iron core mechanism is connected with the conductive mechanism; one end of the conductive plate is connected with the bimetallic element through the soft connection conductive member, and the other end is connected with the coil conductive member. The coil conductive part is wound on the outer sides of the movable iron core assembly and the static iron core and generates a magnetic field after being powered on, and the movable iron core assembly is used for moving towards the static iron core under the traction of the magnetic field so that the conductive plate can make contact with the electric conductor to be conducted and the electric conductor can be connected with the bimetallic element in parallel. According to the utility model, the technical problem that a bimetallic element in a thermal release of a low-current specification product in the prior art is directly heated in series in the whole conductive structure, and when short-circuit current passes through the bimetallic element, the bimetallic element is suddenly heated due to over-high current, so that the bimetallic element is fused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker related equipment, in particular to a thermal magnetic release structure. Background Art

[0002] Thermal-magnetic releases are common and important components used in circuit breakers; while molded case circuit breakers are protective devices used for long-time delay of line overload and instantaneous short-circuit, including characteristics such as ultimate short-circuit breaking capacity and current limiting breaking capacity. Molded case circuit breakers include single-breakpoint and double-breakpoint types.

[0003] The single-breakpoint molded case circuit breaker products currently on the market are lower in cost than double-breakpoint molded case circuit breakers. For small current specifications less than 32A, the bimetallic elements in their thermal releases are directly heated in series in the entire conductive structure; correspondingly, the magnetic release structure is a fixed value of solenoid or snap-on type, and is either front-mounted or rear-mounted.

[0004] However, when the current flowing through an electrical circuit exceeds a thousand times In, the bimetallic element, unable to withstand the rapidly rising temperature, will fuse below the nominal breaking capacity, a phenomenon that violates product standards. Therefore, low-current single-breakpoint molded case circuit breakers generally cannot meet breaking specifications above 50kA, failing to meet market demand for single-breakpoint molded case circuit breakers. Utility Model Content

[0005] The purpose of the utility model is to provide a thermal magnetic release structure to alleviate the technical problem existing in the prior art of low-current specification products, in which the bimetallic element in the thermal release is a series direct-heated type in the entire conductive structure. When a short-circuit current passes through the bimetallic element, the bimetallic element heats up rapidly due to the excessive current, thereby causing it to fuse.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a thermal magnetic release structure, including a conductive mechanism, a moving iron core mechanism, and a magnetic yoke mechanism;

[0008] The conductive mechanism includes a conductor, a bimetallic element, a coil conductive part and a soft-connect conductive part, and one end of the conductor is connected to the bimetallic element;

[0009] The movable iron core mechanism is connected to the conductive mechanism, and the movable iron core mechanism includes a movable iron core assembly and a conductive plate, and the movable iron core assembly is connected to the conductive plate;

[0010] One end of the conductive plate is connected to the bimetallic element through the soft-connect conductive member, and the other end is connected to the coil conductive member;

[0011] The yoke mechanism is connected to the conductive mechanism, and the yoke mechanism includes a static iron core, and the static iron core is distributed relative to the moving iron core assembly;

[0012] The coil conductive part is wound around the outside of the moving iron core assembly and the static iron core and generates a magnetic field when energized. The moving iron core assembly is used to move toward the static iron core under the traction of the magnetic field, so that the conductive plate contacts and conducts with the conductor and realizes the parallel connection of the conductor and the bimetallic element.

[0013] Furthermore, the conductor includes a first connecting portion, a supporting portion, a fixing portion, and a second connecting portion, wherein the first connecting portion is connected to the fixing portion through the supporting portion, and the first connecting portion is used to connect to the conductive plate when the moving iron core assembly is used to move toward the static iron core under the traction of the magnetic field;

[0014] The fixing portion is connected to the bimetallic element, and one end of the fixing portion away from the supporting portion is connected to the second connecting portion.

[0015] Furthermore, one end of the bimetallic element is connected to the fixing portion through a rivet, and the other end of the bimetallic element is provided with a bimetallic adjusting screw.

[0016] Furthermore, the conductive mechanism further includes an outlet terminal, a lower mounting seat and a moving contact, the lower mounting seat is connected to the moving iron core mechanism, and the coil conductive member and the yoke mechanism are housed in the lower mounting seat;

[0017] The outlet terminal is connected to an end of the coil conductive member away from the conductive plate;

[0018] The moving contact is connected to the second connecting portion through a wire.

[0019] Furthermore, the moving iron core mechanism also includes an upper mounting seat, which is connected to the conductive mechanism, and the moving iron core assembly is accommodated inside the upper mounting seat.

[0020] Furthermore, the movable iron core assembly includes a movable iron core and a compression spring, one end of the movable iron core is inserted into the compression spring and is arranged in the magnetic yoke mechanism together with the compression spring;

[0021] The other end of the moving iron core is connected to the conductive plate.

[0022] Furthermore, the moving iron core assembly also includes an insulating spacer, which is connected to the moving iron core and is used to limit the conductive plate.

[0023] Furthermore, the moving iron core mechanism also includes a striking assembly, which is connected to an end of the moving iron core away from the compression spring, and the striking assembly is slidably connected to the upper mounting seat.

[0024] Furthermore, the striking assembly includes a striking member, a transmission member, a rotating shaft and a linkage shaft, and the striking member is slidably connected to the upper mounting seat;

[0025] The transmission member is rotatably connected to the upper mounting seat via the rotating shaft, and one end of the transmission member is connected to the moving iron core via the linkage shaft, and the other end is connected to the striking member. The moving iron core assembly is used to drive the striking member to move via the transmission member.

[0026] Furthermore, the yoke mechanism further comprises an insulating sleeve, a yoke body and a yoke sheet, wherein the insulating sleeve is connected to the yoke body and is arranged in the space where the coil conductive member is wound;

[0027] One end of the static iron core is connected to the magnetic yoke body, and the other end is inserted into the insulating sleeve;

[0028] The movable iron core and the compression spring are both inserted into the insulating sleeve, and the movable iron core is connected to the static iron core via the compression spring;

[0029] The yoke piece is connected to the yoke body, and the yoke piece is connected to an end of the insulating sleeve away from the static iron core.

[0030] The utility model can achieve the following beneficial effects:

[0031] In the first aspect, the utility model provides a thermal magnetic release structure, including a conductive mechanism, a moving iron core mechanism and a yoke mechanism; the conductive mechanism includes a conductor, a bimetallic element, a coil conductive part and a soft-connect conductive part, and one end of the conductor is connected to the bimetallic element; the moving iron core mechanism is connected to the conductive mechanism, and the moving iron core mechanism includes a moving iron core assembly and a conductive plate, and the moving iron core assembly is connected to the conductive plate; one end of the conductive plate is connected to the bimetallic element through the soft-connect conductive part, and the other end is connected to the coil conductive part; the yoke mechanism is connected to the conductive mechanism, and the yoke mechanism includes a static iron core, and the static iron core and the moving iron core assembly are relatively distributed; the coil conductive part is wound around the outside of the moving iron core assembly and the static iron core and generates a magnetic field after power is applied, and the moving iron core assembly is used to move toward the static iron core under the traction of the magnetic field, so that the conductive plate contacts and conducts with the conductor and realizes the parallel connection of the conductor and the bimetallic element.

[0032] In the present invention, the conductive mechanism is detachably connected to the moving iron core mechanism, and the conductive mechanism at least includes a conductor, a bimetallic element, a coil conductive part and a soft-connected conductive part; among them, the conductor is connected to the bimetallic element, and the bimetallic element is connected to the conductive plate of the moving iron core mechanism through the soft-connected conductive part, and the other end of the conductive plate is connected to the coil conductive part, thereby forming a path connected in sequence by the conductor, the bimetallic element, the soft-connected conductive part, the conductive plate and the coil conductive part; when in use, when the current flowing through this path is too large, the magnetic field formed by the coil conductive part is enhanced, thereby driving the moving iron core assembly located in this field to move, and accordingly, the conductive plate connected to the moving iron core assembly will move synchronously until it contacts and conducts with the conductor, at which time the conductor and the bimetallic element are in parallel, thereby avoiding the situation where the bimetallic element is heated rapidly and then melted due to excessive current flowing through it.

[0033] Compared with the prior art, the thermal magnetic release structure provided by the present invention forms a magnetic field after the coil conductive part is energized, and after the magnetic field increases to a certain extent, it drives the moving iron core assembly to move, and then synchronously drives the conductive plate to move until it is connected to the conductor and energized, so as to realize the parallel connection of the conductor and the bimetallic element. At this time, the current flowing through the bimetallic element can be reduced, thereby avoiding the problem of the bimetallic element heating up or even melting due to excessive current.

[0034] In summary, the present invention at least alleviates the technical problem that exists in the prior art of small current specification products, in which the bimetallic element in the thermal release is a series direct heating type in the entire conductive structure. When a short-circuit current passes through the bimetallic element, the bimetallic element heats up rapidly due to the excessive current, thereby causing it to melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of the three-dimensional structure of the thermal-magnetic release structure provided by an embodiment of the utility model;

[0037] Figure 2 A schematic front view of a yoke mechanism of a thermal magnetic release structure provided by an embodiment of the present invention;

[0038] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0039] Figure 4 A three-dimensional schematic diagram of a moving iron core mechanism of a thermal-magnetic release structure provided by an embodiment of the present utility model;

[0040] Figure 5 A schematic top view of the moving iron core mechanism of the thermal-magnetic release structure provided in an embodiment of the present utility model;

[0041] Figure 6 for Figure 5 BB cross-sectional structure diagram;

[0042] Figure 7 A three-dimensional schematic diagram of the conductive mechanism of the thermal-magnetic release structure provided in an embodiment of the present utility model;

[0043] Figure 8 A schematic front view of the conductive mechanism of the thermal-magnetic release structure provided by an embodiment of the present utility model;

[0044] Figure 9 A schematic diagram of the three-dimensional structure of the conductor of the thermal-magnetic release structure provided by an embodiment of the utility model;

[0045] Figure 10 A schematic cross-sectional view of the internal structure of the thermal-magnetic release structure provided by an embodiment of the present invention in normal and overload states;

[0046] Figure 11 A schematic cross-sectional view of the internal structure of the thermal-magnetic release structure provided by an embodiment of the present utility model in a short-circuit state;

[0047] Figure 12 A schematic diagram of the shunt principle of the thermal-magnetic release structure provided in an embodiment of the utility model.

[0048] Icons: 1-conductive mechanism; 11-conductor; 111-first connecting portion; 112-supporting portion; 113-fixing portion; 114-second connecting portion; 12-bimetallic element; 121-rivet; 122-bimetallic adjustment screw; 13-outlet terminal; 14-coil conductive member; 15-flexible conductive member; 16-lower mounting seat; 17-moving contact; 2-moving iron core mechanism; 21-upper mounting seat; 22-conductive plate; 23-moving iron core; 24-compression spring; 25-striking member; 26-transmission member; 27-rotating shaft; 28-linking shaft; 29-insulating spacer; 3-yoke mechanism; 31-insulating sleeve; 32-yoke body; 33-static iron core; 34-yoke sheet; 4-incoming terminal; 41-static contact; 5-operating mechanism; 6-magnetic release; 71-shunt conductor; 72-shunt contact; 8-magnetic release coil; 9-outgoing terminal. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0052] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0054] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0055] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0056] Example 1

[0057] This embodiment provides a thermal magnetic release structure, referring to Figure 1 、 Figure 4 and Figure 7 The thermal magnetic release structure includes a conductive mechanism 1, a moving iron core mechanism 2 and a yoke mechanism 3; the conductive mechanism 1 includes a conductor 11, a bimetallic element 12, a coil conductive part 14 and a soft-connect conductive part 15, and one end of the conductor 11 is connected to the bimetallic element 12; the moving iron core mechanism 2 is connected to the conductive mechanism 1, and the moving iron core mechanism 2 includes a moving iron core assembly and a conductive plate 22, and the moving iron core assembly is connected to the conductive plate 22; one end of the conductive plate 22 is connected to the bimetallic element 12 through the soft-connect conductive part 15, and the other end is connected to the coil conductive part 14; the yoke mechanism 3 is connected to the conductive mechanism 1, and the yoke mechanism 3 includes a static iron core 33, and the static iron core 33 is distributed relative to the moving iron core assembly; the coil conductive part 14 is wound around the outside of the moving iron core assembly and the static iron core 33 and generates a magnetic field when energized, and the moving iron core assembly is used to move toward the static iron core 33 under the traction of the magnetic field, so that the conductive plate 22 is connected to the conductor 11 and the conductor 11 is connected in parallel with the bimetallic element 12.

[0058] The embodiments of the present utility model at least alleviate the technical problem existing in the prior art of small current specification products, in which the bimetallic element in the thermal release is a series direct heating type in the entire conductive structure. When a short-circuit current passes through the bimetallic element, the bimetallic element is rapidly heated due to the excessive current, thereby causing it to melt.

[0059] In an embodiment of the present invention, the conductive mechanism 1 is detachably connected to the moving iron core mechanism 2, and the conductive mechanism 1 includes at least a conductor 11, a bimetallic element 12, a coil conductive member 14, and a soft-connected conductive member 15; wherein the conductor 11 is connected to the bimetallic element 12, and the bimetallic element 12 is connected to the conductive plate 22 of the moving iron core mechanism through the soft-connected conductive member 15, and the other end of the conductive plate 22 is connected to the coil conductive member 14, thereby forming a path connected in sequence by the conductor 11, the bimetallic element 12, the soft-connected conductive member 15, the conductive plate 22, and the coil conductive member 14; refer to Figure 10 、 Figure 11 and Figure 12During use, when the current flowing through this path is too large, the magnetic field formed by the coil conductive member 14 is enhanced, thereby driving the moving iron core assembly located in this field to move. Correspondingly, the conductive plate 22 connected to the moving iron core assembly will move synchronously until it contacts and conducts with the conductor 11. At this time, the conductor 11 and the bimetallic element 12 are connected in parallel, thereby avoiding the situation where the bimetallic element 12 is heated rapidly and then melted due to the excessive current flowing through it.

[0060] Compared with the prior art, the thermal magnetic release structure provided by the embodiment of the present invention forms a magnetic field after the coil conductive member 14 is energized, and after the magnetic field increases to a certain extent, it drives the moving iron core assembly to move, thereby synchronously driving the conductive plate 22 to move until it is connected to the conductor 11 and energized, so as to realize the parallel connection of the conductor 11 and the bimetallic element 12. At this time, the current flowing through the bimetallic element 12 can be reduced, thereby avoiding the problem of the bimetallic element 12 heating up or even melting due to excessive current.

[0061] In an optional implementation manner of this embodiment, refer to Figure 9 The conductor 11 includes a first connecting portion 111, a supporting portion 112, a fixing portion 113 and a second connecting portion 114. The first connecting portion 111 is connected to the fixing portion 113 through the supporting portion 112, and the first connecting portion 111 is used to connect to the conductive plate 22 when the moving iron core assembly is used to move toward the static iron core 33 under the traction of the magnetic field; the fixing portion 113 is connected to the bimetallic element 12, and the end of the fixing portion 113 away from the supporting portion 112 is connected to the second connecting portion 114.

[0062] Specifically: the first connecting portion 111, the supporting portion 112, the fixing portion 113 and the second connecting portion 114 are connected in sequence, and preferably, the first connecting portion 111 and the second connecting portion 114 can be horizontally distributed, and the fixing portion 113 is used to connect with the bimetallic element 12, and there is a gap between the supporting portion 112 and the bimetallic element 12.

[0063] Further, refer to Figure 8 One end of the bimetallic element 12 is connected to the fixing portion 113 through a rivet 121 , and the other end of the bimetallic element 12 is provided with a bimetallic adjusting screw 122 .

[0064] Specifically, one end of the bimetallic element 12 is connected to the fixing portion 113 via a rivet 121. Preferably, there may be two rivets 121 for connecting one end of the bimetallic element 12 to the fixing portion 113. It should be noted that the bimetallic element and the fixing portion 113 may also be connected by welding.

[0065] In an optional implementation manner of this embodiment, refer to Figure 7 or Figure 8The conductive mechanism 1 also includes an outlet terminal 13, a lower mounting seat 16 and a moving contact 17. The lower mounting seat 16 is connected to the moving iron core mechanism 2, and the lower mounting seat 16 contains the coil conductive member 14 and the yoke mechanism 3; the outlet terminal 13 is connected to the end of the coil conductive member 14 away from the conductive plate 22; the moving contact 17 is connected to the second connecting part 114 through a wire.

[0066] Specifically: the lower mounting seat 16 is provided with an accommodating space for placing the coil conductive member 14 and the yoke mechanism 3, and the moving contact 17 is electrically connected to the second connecting portion 114 through a wire, and the outlet terminal 13 is connected to the coil conductive member 14; Figure 10 and Figure 11 The current flows into the moving contact 17 and finally passes through the outlet terminal 13 after passing through various components.

[0067] In an optional implementation manner of this embodiment, refer to Figure 4 The moving iron core mechanism 2 further includes an upper mounting seat 21 , which is connected to the conductive mechanism 1 , and the upper mounting seat 21 accommodates a moving iron core assembly.

[0068] Specifically: the upper mounting seat 21 is connected to the lower mounting seat 16 of the conductive mechanism 1, and preferably, buckles are symmetrically provided on both sides of the upper mounting seat 21, that is, the upper mounting seat 21 is detachably connected to the lower mounting seat 16 through the buckles, and the moving iron core assembly is arranged inside the upper mounting seat 21.

[0069] Further, refer to Figure 4 or Figure 6 The moving iron core assembly includes a moving iron core 23 and a compression spring 24 . One end of the moving iron core 23 is inserted into the compression spring 24 and is arranged in the yoke mechanism 3 together with the compression spring 24 ; the other end of the moving iron core 23 is connected to the conductive plate 22 .

[0070] Specifically: one end of the moving iron core 23 is inserted into the compression spring 24 and fixed, and the other end of the compression spring 24 is connected to the static iron core 33, and the top of the moving iron core 23 is connected to the conductive plate 22; when in use, refer to Figure 10 When in normal or overload state, the magnetic force generated by the coil conductive member 14 drives the moving iron core 23 to move toward the static iron core 33. At this time, due to the elastic force of the compression spring 24, it offsets the gravity of the moving iron core 23 and the magnetic attraction, thereby making the conductive plate 22 not in contact with the conductor 11; but in the short circuit state, refer to Figure 11 The coil conductive member 14 generates an excessively large magnetic force, and the elastic force of the compression spring 24 cannot support the magnetic force received by the moving iron core 23, causing the moving iron core 23 to move toward the static iron core 33 until the conductive plate 22 is connected to the conductor 11. At this time, the current can also flow directly from the conductor 11 through the conductive plate 22 to connect the conductor 11 in parallel with the bimetallic element 12.

[0071] Further, refer to Figure 5 The moving iron core assembly further includes an insulating spacer 29 , which is connected to the moving iron core 23 and is used to limit the conductive plate 22 .

[0072] Specifically, the insulating spacer 29 is connected to the top of the moving iron core 23 to fix the conductive plate 22 and the moving iron core 23 from the top, thereby limiting the conductive plate 22 from above through the insulating spacer 29 .

[0073] In an optional implementation manner of this embodiment, refer to Figure 4 The moving iron core mechanism 2 also includes a striking assembly, which is connected to one end of the moving iron core 23 away from the compression spring 24, and the striking assembly is slidably connected to the upper mounting seat 21.

[0074] Specifically: the striking assembly is connected to the end of the moving iron core 23 away from the compression spring 24, and the striking assembly is slidably connected to the upper mounting seat 21; when in use, the moving iron core 23 moves toward the static iron core 33 due to the action of magnetic force, and during this movement, it drives the output end of the striking assembly to move horizontally, so as to realize the function of gradually hitting the external traction rod during the movement of the moving iron core 23.

[0075] Further, refer to Figure 4 or Figure 6 The striking assembly includes a striking member 25, a transmission member 26, a rotating shaft 27 and a linkage shaft 28. The striking member 25 is slidingly connected to the upper mounting seat 21; the transmission member 26 is rotationally connected to the upper mounting seat 21 through the rotating shaft 27, and one end of the transmission member 26 is connected to the moving iron core 23 through the linkage shaft 28, and the other end is connected to the striking member 25. The moving iron core assembly is used to drive the striking member 25 to move through the transmission member 26.

[0076] Specifically, the top of the moving iron core 23 is rotatably connected to one end of the transmission member 26 via a linkage shaft 28, and the transmission member 26 is rotatably connected to the upper mounting seat 21 via a rotating shaft 27. A sliding slot is provided on the upper mounting seat 21, and the end of the rotating shaft 27 slides within this sliding slot. This allows the rotating shaft 27 to slide within the sliding slot when one end of the transmission member 26 is pulled downward by the moving iron core 23. The other end of the transmission member 26 is configured as a plug-in structure, which tilts up and moves along the extension direction of the sliding slot during the downward movement of the moving iron core 23. Correspondingly, the striking member 25 is provided with an insertion slot, into which the plug-in plate is inserted, and the movement of the plug-in plate drives the striking member 25 to move. The other end of the striking member 25 is provided with two striking portions, which are used to strike the traction rod. Slide bars are provided on both sides of the striking member 25 for sliding within the upper mounting seat 21, ensuring smoother sliding of the striking member 25.

[0077] In an optional implementation manner of this embodiment, refer to Figure 2 and Figure 3 The yoke mechanism 3 also includes an insulating sleeve 31, a yoke body 32 and a yoke piece 34. The insulating sleeve 31 is connected to the yoke body 32, and the insulating sleeve 31 is arranged in the space where the coil conductive member 14 is wound; one end of the static iron core 33 is connected to the yoke body 32, and the other end is inserted into the insulating sleeve 31; the moving iron core 23 and the compression spring 24 are both inserted into the insulating sleeve 31, and the moving iron core 23 is connected to the static iron core 33 through the compression spring 24; the yoke piece 34 is connected to the yoke body 32, and the yoke piece 34 is connected to the end of the insulating sleeve 31 away from the static iron core 33.

[0078] Specifically: the bottom of the static iron core 33 is inserted into the bottom socket of the yoke body 32 and fixed, and the other end of the static iron core 33 is inserted into the insulating sleeve 31; the compression spring 24 is placed in the insulating sleeve 31 and connected to the static iron core 33, and the bottom of the moving iron core 23 is inserted into the insulating sleeve 31 and the compression spring 24 in turn, and then the yoke piece 34 is covered on the top of the yoke body 32, and the yoke piece 34 is provided with a hole for the top of the moving iron core 23 to pass through; and the moving iron core 23 is preferably a cylindrical structure, and the cylindrical radius in the middle is larger, so that the compression spring 24 and the yoke piece 34 can limit the bottom and top of the moving iron core 23 respectively.

[0079] It should be emphasized that, referring to Figure 12 The magnetic release 6 has two functions: first, it pulls the conductive plate 22 to contact and conduct with the conductor 11, forming a parallel structure with the bimetallic element 12 to produce a shunting effect; second, it pulls the transmission member 26, which in turn pushes the striking member 25, causing the traction rod to trip, the operating mechanism to operate, and the moving contact 17 and the static contact 41 to disconnect, and the circuit breaker cuts off the circuit.

[0080] Reference Figure 12 The incoming line terminal 4 is connected or disconnected with the moving contact 17 through the static contact 41 to achieve the circuit conduction or disconnection effect.

[0081] The shunt conductor 71 is connected to the shunt contact 72, the shunt branch is energized, and a parallel connection is formed with the bimetallic element 12; the shunt conductor 71 is disconnected from the shunt contact 72, the shunt branch is de-energized, and the bimetallic element 12 is in a series state in the circuit.

[0082] It is then connected to the magnetic release coil 8 and the output terminal 9.

[0083] When the magnetic release coil 8 is in the circuit-on state, when the electromagnetic attraction generated by the current flowing through it is large enough, the magnetic release 6 moves, pulling the shunt contact 72 to connect with the shunt conductor 71, achieving a parallel effect. At the same time, the magnetic release 6 moves, pushing the operating mechanism 5 to release, and the operating mechanism 5 pushes open the moving contact 17 to disconnect the circuit.

[0084] When the electromagnetic attraction generated by the flowing current is not large enough, the magnetic release 6 does not move, and the current in the circuit all flows through the bimetallic element 12 .

[0085] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the various embodiments of the utility model.

Claims

1. A thermal magnetic release structure, characterized in that: It comprises a conductive mechanism (1), a moving iron core mechanism (2), and a magnetic yoke mechanism (3); The conductive mechanism (1) comprises a conductor (11), a bimetallic element (12), a coil conductive part (14) and a soft-connect conductive part (15), and one end of the conductor (11) is connected to the bimetallic element (12); The moving iron core mechanism (2) is connected to the conductive mechanism (1), and the moving iron core mechanism (2) comprises a moving iron core assembly and a conductive plate (22), and the moving iron core assembly is connected to the conductive plate (22); One end of the conductive plate (22) is connected to the bimetallic element (12) via the soft-connect conductive member (15), and the other end is connected to the coil conductive member (14); The yoke mechanism (3) is connected to the conductive mechanism (1), and the yoke mechanism (3) includes a static iron core (33), and the static iron core (33) is distributed relative to the moving iron core assembly; The coil conductive member (14) is wound around the outer sides of the moving iron core assembly and the static iron core (33) and generates a magnetic field when energized. The moving iron core assembly is used to move toward the static iron core (33) under the traction of the magnetic field, so that the conductive plate (22) and the conductor (11) are in contact and conductive, and the conductor (11) and the bimetallic element (12) are connected in parallel.

2. The thermal magnetic release structure according to claim 1, characterized in that: The conductor (11) comprises a first connecting portion (111), a supporting portion (112), a fixing portion (113), and a second connecting portion (114); the first connecting portion (111) is connected to the fixing portion (113) via the supporting portion (112); and the first connecting portion (111) is used to connect to the conductive plate (22) when the moving iron core assembly is used to move toward the static iron core (33) under the traction of a magnetic field; The fixing portion (113) is connected to the bimetallic element (12), and one end of the fixing portion (113) away from the supporting portion (112) is connected to the second connecting portion (114).

3. The thermal magnetic release structure according to claim 2, characterized in that: One end of the bimetallic element (12) is connected to the fixing portion (113) via a rivet (121), and the other end of the bimetallic element (12) is provided with a bimetallic adjusting screw (122).

4. The thermal magnetic release structure according to claim 2, characterized in that: The conductive mechanism (1) further comprises an outlet terminal (13), a lower mounting seat (16) and a moving contact (17); the lower mounting seat (16) is connected to the moving iron core mechanism (2), and the coil conductive member (14) and the yoke mechanism (3) are accommodated in the lower mounting seat (16); The outlet terminal (13) is connected to an end of the coil conductive member (14) away from the conductive plate (22); The moving contact (17) is connected to the second connecting portion (114) via a wire.

5. The thermal magnetic release structure according to claim 1, characterized in that: The movable iron core mechanism (2) further comprises an upper mounting seat (21), the upper mounting seat (21) being connected to the conductive mechanism (1), and the movable iron core assembly being accommodated inside the upper mounting seat (21).

6. The thermal magnetic release structure according to claim 5, characterized in that: The movable iron core assembly comprises a movable iron core (23) and a compression spring (24); one end of the movable iron core (23) is inserted into the compression spring (24) and is arranged in the yoke mechanism (3) together with the compression spring (24); The other end of the moving iron core (23) is connected to the conductive plate (22).

7. The thermal magnetic release structure according to claim 6, characterized in that: The moving iron core assembly further includes an insulating spacer (29), the insulating spacer (29) is connected to the moving iron core (23), and the insulating spacer (29) is used to limit the position of the conductive plate (22).

8. The thermal magnetic release structure according to claim 6, characterized in that: The movable iron core mechanism (2) further comprises a striking assembly, the striking assembly being connected to an end of the movable iron core (23) away from the compression spring (24), and the striking assembly being slidably connected to the upper mounting seat (21).

9. The thermal magnetic release structure according to claim 8, characterized in that: The striking assembly comprises a striking member (25), a transmission member (26), a rotating shaft (27) and a linkage shaft (28); the striking member (25) is slidably connected to the upper mounting seat (21); The transmission member (26) is rotatably connected to the upper mounting seat (21) via the rotating shaft (27), and one end of the transmission member (26) is connected to the movable iron core (23) via the linkage shaft (28), and the other end is connected to the striking member (25). The movable iron core assembly is used to drive the striking member (25) to move via the transmission member (26).

10. The thermal magnetic release structure according to any one of claims 6 to 9, characterized in that: The yoke mechanism (3) further comprises an insulating sleeve (31), a yoke body (32) and a yoke sheet (34); the insulating sleeve (31) is connected to the yoke body (32), and the insulating sleeve (31) is arranged in a space where the coil conductive member (14) is wound; One end of the static iron core (33) is connected to the magnetic yoke body (32), and the other end is inserted into the insulating sleeve (31); The movable iron core (23) and the compression spring (24) are both inserted into the insulating sleeve (31), and the movable iron core (23) is connected to the static iron core (33) via the compression spring (24); The yoke piece (34) is connected to the yoke body (32), and the yoke piece (34) is connected to an end of the insulating sleeve (31) away from the static iron core (33).

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