Short-circuit parallel shunting type thermomagnetic release

Abstract

The utility model, which relates to the technical field of the thermomagnetic release, provides a short-circuit parallel shunting type thermomagnetic release comprising a movable iron core structure, a conductive structure and a magnet yoke structure. The movable iron core structure comprises a beating mechanism, a flow dividing movable iron core assembly and an instantaneous movable iron core assembly, the flow dividing movable iron core assembly and the instantaneous movable iron core assembly are both connected with the magnet yoke structure, and the end, away from the static iron core, of the instantaneous movable iron core assembly is connected with the beating mechanism; the shunt movable iron core assemblies are used for moving towards the static iron core under the traction of a magnetic field, so that the conductive plates are in contact conduction with the conductors, and the conductors are connected in parallel with the bimetallic element; the instantaneous movable iron core assembly is used for moving towards the static iron core under the traction of a magnetic field. According to the utility model, the technical problem in the prior art that the bimetallic element is deformed and even fused because the bimetallic element cannot bear rapid temperature rise due to time difference caused by the fact that the shunting contact is not conducted when the traction rod trips to enable the mechanism to act is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal magnetic releases, in particular to a short-circuit parallel shunt type thermal magnetic release. Background Art

[0002] Single-break molded case circuit breakers currently on the market are less expensive than dual-break versions. For low-current specifications below 32A, the thermal release is connected in series with the entire conductive system, meaning the bimetallic element is directly heated. The magnetic release is a solenoid or snap-action type, with a fixed current operating value. During operation, the magnetic release directly pulls the pull rod by pulling the movable iron core.

[0003] Magnetic trip devices are classified as either front-mounted or rear-mounted. When the current flowing through an electrical circuit exceeds several thousand times the specified current, the bimetallic element, unable to withstand the rapidly rising temperature, melts below the nominal breaking rating, failing to meet product standards. Consequently, low-current, single-breakpoint molded case circuit breakers generally fail to meet breaking specifications exceeding several thousand times the specified current, failing to meet market demand for such products.

[0004] Existing thermal-magnetic releases often combine shunt contacts with a moving iron core to achieve synchronous movement. However, this approach poses the risk that when the drawbar trips and the mechanism is activated, the shunt contacts may not yet be conductive. This is mainly because when the striking member contacts the drawbar, it must overcome the drawbar's tripping force to trip the drawbar and allow the shunt contacts to reliably contact the shunt conductor and conduct. Therefore, there is a time difference. If the interruption performance requirements are higher within this time difference, the bimetallic metal element may still deform or melt due to being unable to withstand the rapid increase in temperature. Utility Model Content

[0005] The purpose of the utility model is to provide a short-circuit parallel shunt type thermal magnetic release to alleviate the technical problem in the prior art that when the traction rod is tripped and the mechanism is activated, there is a time difference due to the shunt contact not being turned on in time, which in turn causes the bimetallic element to be unable to withstand the rapid temperature increase and cause deformation or even melting.

[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 short-circuit parallel shunt type thermal magnetic release, comprising a moving iron core structure, a conductive structure and a magnetic yoke structure;

[0008] The yoke structure is connected to the conductive structure, and the yoke structure includes a static iron core;

[0009] The moving iron core structure includes a striking mechanism, a shunt moving iron core assembly and an instantaneous moving iron core assembly, the shunt moving iron core assembly and the instantaneous moving iron core assembly are both connected to the magnetic yoke structure, and the shunt moving iron core assembly and the instantaneous moving iron core assembly are both distributed relative to the static iron core, and the instantaneous moving iron core assembly is connected to the striking mechanism at one end away from the static iron core;

[0010] The conductive structure includes a conductive plate, a coil conductive member, a bimetallic element, a flexible conductive member, and a conductor, one end of the conductor is connected to the bimetallic element, one end of the flexible conductive member is connected to the bimetallic element, and the other end is connected to the conductive plate, the conductive plate is connected to the shunt flow core assembly, and the conductive plate is connected to the coil conductive member;

[0011] The coil conductive member is wound around the outer sides of the shunt moving iron core assembly, the instantaneous moving iron core assembly and the static iron core, and generates a magnetic field when energized;

[0012] The split moving core components are all used to move toward the static core under the traction of the magnetic field, so that the conductive plate contacts and conducts with the conductor and realizes parallel connection between the conductor and the bimetallic element;

[0013] The instantaneous moving iron core components are all used to move toward the static iron core under the traction of the magnetic field, and drive the striking mechanism to impact the external traction rod.

[0014] Furthermore, the shunt mobile core assembly includes a shunt mobile core body and a first compression spring, one end of the shunt mobile core body is connected to the conductive plate, and the other end is connected to the static iron core through the first compression spring, and the shunt mobile core body is used to drive the conductive plate to contact and conduct with the conductor through the magnetic force of the magnetic field.

[0015] Furthermore, the instantaneous moving iron core assembly includes an instantaneous moving iron core body, a second compression spring and a linkage shaft. One end of the instantaneous moving iron core body is connected to the striking mechanism through the linkage shaft, and the other end of the instantaneous moving iron core body is connected to the static iron core through the second compression spring. The instantaneous moving iron core body is used to drive the striking mechanism to hit the traction rod through the magnetic force of the magnetic field.

[0016] Furthermore, the moving iron core structure further includes an upper mounting seat, and the upper mounting seat is connected to the magnetic yoke structure;

[0017] The striking mechanism includes a transmission component and a striking member, wherein the transmission component is connected to the linkage shaft and the transmission component is connected to the striking member, and the transmission component is used to drive the striking member to strike the traction rod;

[0018] The striking member is slidably connected to the upper mounting seat.

[0019] Furthermore, the transmission component includes a transmission member and a rotating shaft, the transmission member is rotatably connected to the upper mounting seat through the rotating shaft, and the transmission member is connected to the instantaneous moving iron core body through the linkage shaft, and an insertion portion is provided at one end of the transmission member away from the instantaneous moving iron core body, and the insertion portion is inserted into the through slot of the striking member to drive the striking member to move.

[0020] Furthermore, the yoke structure further comprises a lower mounting seat, a yoke body, a magnetic cap and a coil sleeve, wherein the yoke body is arranged in the lower mounting seat, and the lower mounting seat is detachably connected to the upper mounting seat;

[0021] One end of the coil sleeve is connected to the magnetic yoke body, and the other end of the coil sleeve is connected to the magnetic cap, and the shunt moving iron core assembly and the instantaneous moving iron core assembly are arranged in the coil sleeve;

[0022] The magnetic cap is connected to the magnetic yoke body in a limiting manner.

[0023] Furthermore, the shunt moving iron core body is sleeved on the outer side of the instantaneous moving iron core body, and one end of the instantaneous moving iron core body away from the static iron core passes through the conductive plate.

[0024] Furthermore, the conductive structure further comprises a moving contact and an outlet terminal, and the moving contact is connected to the conductor;

[0025] The outlet terminal is connected to an end of the coil conductive member away from the conductive plate.

[0026] Furthermore, a bimetallic adjusting screw is provided at one end of the bimetallic element, and the other end of the bimetallic element is connected to the conductor via a rivet.

[0027] Furthermore, the conductive plate is provided with a connection hole;

[0028] A connecting portion is provided on the top of the shunt moving core assembly, and the shunt moving core assembly is fixedly connected to the connecting hole through the connecting portion.

[0029] The utility model can achieve the following beneficial effects:

[0030] The utility model provides a short-circuit parallel shunt type thermal magnetic release, comprising a moving iron core structure, a conductive structure and a yoke structure; the yoke structure is connected to the conductive structure, and the yoke structure comprises a static iron core; the moving iron core structure comprises a striking mechanism, a shunt moving iron core assembly and an instantaneous moving iron core assembly, both of which are connected to the yoke structure, and both of which are relatively distributed with the static iron core, and one end of the instantaneous moving iron core assembly away from the static iron core is connected to the striking mechanism; the conductive structure comprises a conductive plate, a coil conductive part, a bimetallic element, a soft-connected conductive part and a conductor, and the conductor One end of the flexible conductive part is connected to the bimetallic element, one end of the flexible conductive part is connected to the bimetallic element, and the other end is connected to the conductive plate, the conductive plate is connected to the shunt moving iron core assembly, and the conductive plate is connected to the coil conductive part; the coil conductive part is wound around the outside of the shunt moving iron core assembly, the instantaneous moving iron core assembly and the static iron core, and generates a magnetic field when energized; the shunt 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; the instantaneous moving iron core assembly is used to move toward the static iron core under the traction of the magnetic field, and drive the striking mechanism to hit the external traction rod.

[0031] In the present invention, the conductive structure at least includes a conductive plate, a coil conductive part, a bimetallic element, a soft-connected conductive part and a conductor, and one end of the bimetallic element is connected to the conductor, and the other end is connected to the conductive plate through the soft-connected conductive part, and the other end of the conductive plate is connected to the coil conductive part, so that the current can pass through the conductor, the bimetallic element, the soft-connected conductive part, the conductive plate and the coil conductive part; and the coil conductive part encloses a accommodating space for accommodating the magnetic yoke structure, and after the coil conductive part is energized, a magnetic field is formed in this accommodating space, and the static iron core, the shunt moving iron core assembly and the instantaneous moving iron core assembly arranged in the magnetic yoke structure are all magnetically excited. Influence of the magnetic force of the field. When in use, when a short-circuit current passes through the pathway, the magnetic force generated by the magnetic field can drive the instantaneous moving iron core assembly to move toward the static iron core, and then drive the striking mechanism connected to the other end to hit the traction rod to make it trip; and when the pathway passes through an extremely large short-circuit current, the magnetic force generated by the magnetic field can drive the shunt moving iron core assembly to move toward the static iron core until the conductive plate contacts and conducts with the conductor. At this time, the conductor and the bimetallic element are connected in parallel, and the current passing through the bimetallic element is reduced. At the same time, the instantaneous moving iron core assembly will also move toward the static iron core under the action of the magnetic force of the magnetic field, and then drive the striking mechanism to hit the traction rod to trip.

[0032] Compared with the existing technology, the short-circuit parallel shunt type thermal magnetic release provided by the utility model drives the shunt moving iron core assembly and the instantaneous moving iron core assembly to move toward the static iron core by the magnetic field formed by the coil conductive part after energization. As the current intensity passing through the coil conductive part is different, the movement results of the shunt moving iron core assembly and the instantaneous moving iron core assembly are also different, thereby realizing the use effect of connecting the conductive plate and the conductor in parallel through the shunt moving iron core assembly, and driving the striking mechanism to hit the traction rod through the instantaneous moving iron core assembly to achieve tripping.

[0033] In summary, the present invention at least alleviates the technical problem in the prior art that when the traction rod is tripped and the mechanism is activated, there is a time difference due to the lack of conduction of the shunt contact, which in turn causes the bimetallic element to be unable to withstand the rapid temperature increase and cause deformation or even melting. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the utility model;

[0036] Figure 2 A three-dimensional schematic diagram of the moving iron core structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the utility model;

[0037] Figure 3 A side view schematic diagram of the moving iron core structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the utility model;

[0038] Figure 4 A three-dimensional schematic diagram of the conductive structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the utility model;

[0039] Figure 5 A side view schematic diagram of the conductive structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the utility model;

[0040] Figure 6 A three-dimensional schematic diagram of the yoke structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model;

[0041] Figure 7 A schematic cross-sectional view of the yoke structure of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model;

[0042] Figure 8 A schematic cross-sectional view of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model under normal current state;

[0043] Figure 9 A schematic cross-sectional view of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model in an overload current state;

[0044] Figure 10 A schematic cross-sectional view of a short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model under a short-circuit current state;

[0045] Figure 11 A schematic diagram of the cross-sectional structure of the short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present utility model at an extremely large short-circuit current;

[0046] Figure 12 A cross-sectional view of the short-circuit parallel shunt type thermal magnetic release provided by an embodiment of the present invention in a delayed action state at an ultra-large short-circuit current;

[0047] Figure 13 This is a schematic diagram of the working principle of the short-circuit parallel shunt type thermal magnetic release provided in an embodiment of the utility model.

[0048] Icons: 1-moving iron core structure; 11-upper mounting seat; 12-transmission assembly; 121-transmission member; 122-rotating shaft; 13-striking member; 14-dividing moving iron core assembly; 141-dividing moving iron core body; 142-first compression spring; 15-instantaneous moving iron core assembly; 151-instantaneous moving iron core body; 152-second compression spring; 153-linkage shaft; 16-limiting block; 2-conductive structure; 21-conductive plate; 211-connecting hole; 22-coil conductive member; 23-double metal Metal components; 231-double metal adjustment screw; 232-rivet; 24-soft-connected conductive part; 25-conductor; 26-moving contact; 27-outlet terminal; 3-yoke structure; 31-lower mounting base; 32-yoke body; 33-magnetic cap; 34-coil sleeve; 35-static iron core; 4-traction rod; 5-inlet terminal; 51-static contact; 6-operating mechanism; 7-shunt contact; 8-magnetic release coil; 9-outlet terminal; 100-instantaneous moving iron core; 200-shunt moving iron core. 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 short-circuit parallel shunt type thermal magnetic release, referring to Figure 1The short-circuit parallel shunt thermal magnetic release includes a moving iron core structure 1, a conductive structure 2 and a yoke structure 3; the yoke structure 3 is connected to the conductive structure 2, and the yoke structure 3 includes a static iron core 35; the moving iron core structure 1 includes a striking mechanism, a shunt moving iron core assembly 14 and an instantaneous moving iron core assembly 15, the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15 are both connected to the yoke structure 3, and the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15 are both distributed relative to the static iron core 35, and the end of the instantaneous moving iron core assembly 15 away from the static iron core 35 is connected to the striking mechanism; the conductive structure 2 includes a conductive plate 21, a coil conductive part 22, a bimetallic element 23, a soft-connect conductive part 24 and a conductor 25, one end of the conductor 25 is connected to The bimetallic element 23 is connected, one end of the soft-connect conductive part 24 is connected to the bimetallic element 23, and the other end is connected to the conductive plate 21, the conductive plate 21 is connected to the shunt moving iron core assembly 14, and the conductive plate 21 is connected to the coil conductive part 22; the coil conductive part 22 is wound around the outside of the shunt moving iron core assembly 14, the instantaneous moving iron core assembly 15 and the static iron core 35, and generates a magnetic field after power is turned on; the shunt moving iron core assembly 14 is used to move toward the static iron core 35 under the traction of the magnetic field, so that the conductive plate 21 and the conductor 25 are in contact and conductive and the conductor 25 is connected in parallel with the bimetallic element 23; the instantaneous moving iron core assembly 15 is used to move toward the static iron core 35 under the traction of the magnetic field, and drive the striking mechanism to hit the external traction rod 4.

[0058] The embodiment of the utility model at least alleviates the technical problem in the prior art that when the traction rod is tripped and the mechanism is activated, there is a time difference due to the shunt contact not being turned on, which leads to the bimetallic element being unable to withstand the rapid temperature increase and causing deformation or even melting.

[0059] In the embodiment of the present invention, the conductive structure 2 at least includes a conductive plate 21, a coil conductive part 22, a bimetallic element 23, a soft-connected conductive part 24 and a conductor 25, and one end of the bimetallic element 23 is connected to the conductor 25, and the other end is connected to the conductive plate 21 through the soft-connected conductive part 24, and the other end of the conductive plate 21 is connected to the coil conductive part 22, so that the current can pass through the conductor 25, the bimetallic element 23, the soft-connected conductive part 24, the conductive plate 21 and the coil conductive part 22; and the coil conductive part 22 encloses a accommodating space for accommodating the yoke structure 3, and after the coil conductive part 22 is energized, a magnetic field is formed in this accommodating space, and the static iron core 35 and the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15 arranged in the yoke structure 3 are all affected by the magnetic force of the magnetic field. When in use, refer to Figure 10 When a short-circuit current passes through the path, the magnetic force generated by the magnetic field can drive the instantaneous moving iron core assembly 15 to move toward the static iron core 35, and then drive the striking mechanism connected to the other end to hit the traction rod 4 to make it trip; refer to Figure 11 and Figure 12When a super-large short-circuit current passes through the path, the magnetic force generated by the magnetic field can drive the shunt moving iron core assembly 14 to move toward the static iron core 35 until the conductive plate 21 and the conductor 25 are in contact and conductive. At this time, the conductor 25 and the bimetallic element 23 are connected in parallel, and the current passing through the bimetallic element 23 is reduced. At the same time, the instantaneous moving iron core assembly 15 will also move toward the static iron core 35 under the magnetic force of the magnetic field, thereby driving the striking mechanism to hit the traction rod 4 and trip.

[0060] Compared with the prior art, the short-circuit parallel shunt thermal magnetic release provided by the embodiment of the present invention drives the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15 to move toward the static iron core 35 by the magnetic field formed by the coil conductive part 22 after energization. As the current intensity passing through the coil conductive part 22 is different, the movement results of the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15 are also different, thereby achieving the effect of connecting the conductive plate 21 and the conductor 25 in parallel through the shunt moving iron core assembly 14, and driving the striking mechanism to hit the traction rod 4 through the instantaneous moving iron core assembly 15 to achieve tripping.

[0061] In an optional implementation manner of this embodiment, refer to Figure 2 or Figure 3 The shunt flow core assembly 14 includes a shunt flow core body 141 and a first compression spring 142. One end of the shunt flow core body 141 is connected to the conductive plate 21, and the other end is connected to the static iron core 35 through the first compression spring 142. The shunt flow core body 141 is used to drive the conductive plate 21 to contact and conduct with the conductor 25 through the magnetic force of the magnetic field.

[0062] Specifically: one end of the shunt mobile core body 141 is connected to the conductive plate 21, and the other end of the shunt mobile core body 141 is connected to the static iron core 35 through the first compression spring 142. When in use, when the coil conductive part 22 is energized to generate a magnetic field, the shunt mobile core body 141 is affected by the magnetic force of the magnetic field and moves toward the static iron core 35 until the conductive plate 21 and the conductor 25 are in contact and conductive, so as to realize the parallel connection of the conductor 25 and the bimetallic element 23.

[0063] Further, refer to Figure 2 and Figure 3 The instantaneous moving iron core assembly 15 includes an instantaneous moving iron core body 151, a second compression spring 152 and a linkage shaft 153. One end of the instantaneous moving iron core body 151 is connected to the striking mechanism through the linkage shaft 153, and the other end of the instantaneous moving iron core body 151 is connected to the static iron core 35 through the second compression spring 152. The instantaneous moving iron core body 151 is used to drive the striking mechanism to hit the traction rod 4 through the magnetic force of the magnetic field.

[0064] Specifically, one end of the instantaneous moving iron core body 151 is connected to the static iron core 35 via a second compression spring 152, while the other end is rotationally connected to the striking mechanism via a linkage shaft 153. Preferably, the instantaneous moving iron core body 151 is a cylindrical structure, while the shunt moving iron core body 141 is a tubular structure. During use, the instantaneous moving iron core body 151 is inserted into the shunt moving iron core body 141, allowing the two to slide relative to each other. Accordingly, the second compression spring 152 is smaller than the first compression spring 142. When the coil conductive member 22 is energized, a magnetic field is generated. The instantaneous moving iron core body 151, influenced by the magnetic force of the magnetic field, moves toward the static iron core 35, thereby driving the striking mechanism to strike the traction rod 4.

[0065] Further, refer to Figure 2 and Figure 3 The moving iron core structure 1 also includes an upper mounting seat 11, which is connected to the yoke structure 3; the striking mechanism includes a transmission component 12 and a striking member 13, the transmission component 12 is connected to the linkage shaft 153, and the transmission component 12 is connected to the striking member 13, and the transmission component 12 is used to drive the striking member 13 to impact the traction rod 4; the striking member 13 is slidably connected to the upper mounting seat 11.

[0066] Specifically: the upper mounting seat 11 is preferably detachably connected to the yoke structure 3, and a slide groove is opened on the upper mounting seat 11 in the horizontal direction, and the striking member 13 is slidably connected to this slide groove; and one end of the transmission component 12 is rotationally connected to the top of the instantaneous moving iron core body 151 through a linkage shaft 153, and the other end is connected to the striking member 13. When in use, the instantaneous moving iron core body 151 moves toward the static iron core 35, thereby achieving the effect of driving the transmission component 12 to drive the striking member 13 to hit the traction rod 4.

[0067] Further, refer to Figure 3 The transmission component 12 includes a transmission member 121 and a rotating shaft 122. The transmission member 121 is rotatably connected to the upper mounting seat 11 through the rotating shaft 122, and the transmission member 121 is connected to the instantaneous moving iron core body 151 through the linkage shaft 153. An insertion portion is provided at one end of the transmission member 121 away from the instantaneous moving iron core body 151, and the insertion portion is inserted into the through slot of the striking member 13 to drive the striking member 13 to move.

[0068] Specifically: the transmission member 121 includes a connecting portion and an inserting portion, and the connecting portion and the inserting portion are preferably integrally formed or welded, and the two ends of the connecting portion are respectively provided with a linkage shaft 153 and a rotating shaft 122, so as to realize a rotational connection with the instantaneous moving iron core body 151 and the upper mounting seat 11 respectively, and the inserting portion is preferably an L-shaped plate structure, one end of which is connected to the connecting portion, and the other end is used to be inserted into the socket opened in the striking member 13, and the striking member 13 is driven to slide along the slide groove of the upper mounting seat 11 through the inserting portion.

[0069] It should be noted that the upper mounting seat 11 is provided with a limiting block 16 , and the limiting block 16 is provided with a limiting portion for limiting the insertion portion of the L-shaped plate structure.

[0070] In an optional implementation manner of this embodiment, refer to Figure 6 and Figure 7 The yoke structure 3 also includes a lower mounting seat 31, a yoke body 32, a magnetic cap 33 and a coil sleeve 34. The yoke body 32 is provided in the lower mounting seat 31, and the lower mounting seat 31 is detachably connected to the upper mounting seat 11; one end of the coil sleeve 34 is connected to the yoke body 32, and the other end of the coil sleeve 34 is connected to the magnetic cap 33. The coil sleeve 34 is provided with a shunt moving iron core assembly 14 and an instantaneous moving iron core assembly 15; the magnetic cap 33 is limitedly connected to the yoke body 32.

[0071] Specifically: the lower mounting seat 31 is preferably snap-connected with the upper mounting seat 11 to achieve a detachable connection between the two, and a yoke body 32 is provided in the lower mounting seat 31 in the vertical direction, one end of the coil sleeve 34 is connected to the yoke body 32, and the other end is connected to the magnetic cap 33, and the magnetic cap 33 is connected to the yoke body 32 to limit and fix the coil sleeve 34, the static iron core 35 is connected to the yoke body 32 and inserted into the coil sleeve 34, and the end of the shunt moving iron core assembly 14 away from the conductive plate 21 and the end of the instantaneous moving iron core assembly 15 away from the transmission assembly 12 are inserted into the coil sleeve 34, and move back and forth along the sleeve extension direction of the coil sleeve 34.

[0072] Further, refer to Figure 3 The shunt moving iron core body 141 is sleeved on the outer side of the instantaneous moving iron core body 151 , and one end of the instantaneous moving iron core body 151 away from the static iron core 35 passes through the conductive plate 21 .

[0073] Specifically: the shunt moving iron core body 141 is sleeved on the outside of the instantaneous moving iron core body 151, and since the top of the shunt moving iron core body 141 is connected to the conductive plate 21, the top of the instantaneous moving iron core body 151 needs to pass through the conductive plate 21 and then be connected to the transmission component 12.

[0074] In an optional implementation manner of this embodiment, refer to Figure 4 or Figure 5 The conductive structure 2 further includes a moving contact 26 and an outlet terminal 27 . The moving contact 26 is connected to the conductor 25 ; the outlet terminal 27 is connected to one end of the coil conductive member 22 away from the conductive plate 21 .

[0075] Specifically: the moving contact 26 is connected to the conductor 25 through a wire, and the output terminal 27 is connected to the end of the coil conductive part 22 away from the conductive plate 21. When in use, the moving contact 26 transmits the current to the conductor 25 through the wire, and the conductor 25 then conducts the current through the bimetallic element 23, the soft-connect conductive part 24, the conductive plate 21, and the coil conductive part 22 to the output terminal 27.

[0076] In an optional implementation manner of this embodiment, refer to Figure 4 One end of the bimetallic element 23 is provided with a bimetallic adjustment screw 231, and the other end of the bimetallic element 23 is connected to the conductor 25 through a rivet 232.

[0077] Specifically: One end of the bimetallic element 23 is provided with a bimetallic adjusting screw 231, which includes a nut and an adjusting screw. Figure 8 When normal current passes, the traction rod 4 is not in the impacted state; when overload current passes, refer to Figure 9 The bimetallic element 23 in the thermal-magnetic release is bent by heat due to excessive current, causing the bimetallic adjustment screw 231 to hit the drawbar 4. The other end of the bimetallic element 23 is connected to the conductor 25 via a rivet 232, preferably with two rivets 232. The bimetallic element 23 can also be welded to the conductor 25 by spot welding.

[0078] In an optional implementation manner of this embodiment, refer to Figure 4 A connecting hole 211 is provided on the conductive plate 21 ; an insertion portion is provided on the top of the shunt flow core assembly 14 , and the insertion portion is connected to the conductive plate 21 by inserting the connecting hole 211 .

[0079] Specifically: two connecting holes 211 are symmetrically provided on the conductive plate 21, and the top of the shunt moving iron core body 141 is correspondingly provided with an insertion clamping portion matching the two connecting holes 211. By inserting the insertion clamping portion into the connecting hole 211 and clamping it, the conductive plate 21 is fixed to the top of the shunt moving iron core body 141; and preferably, the two connecting holes 211 are arranged on both sides of the top of the instantaneous moving iron core body 151.

[0080] It should be emphasized that, referring to Figure 13 , the magnetic release is provided with two sets of moving iron core structures, namely the shunt moving iron core assembly 14 and the instantaneous moving iron core assembly 15. When in use, refer to Figure 8 When the normal operating current flows through the electrical circuit loop, the conductive structure 2 is in a series structure, so that all the current flows through the bimetallic element 23, that is, no current flows through the conductor 25, and the release operates normally; Figure 9When the current in the circuit reaches the overload value, the bimetallic element 23 is directly heated and bent, and the traction rod 4 is pushed to trip through the bimetallic adjustment screw 231; Figure 10 When a short-circuit current is generated in the circuit, the instantaneous moving iron core body 151 is attracted, pulling the transmission member 121, and the transmission member 121 pushes the striking member 13 to hit the traction rod 4, causing the mechanism to cut off the circuit. However, the shunt moving iron core body 141 does not attract due to insufficient suction force, and the conductive structure 2 is still in a series structure; refer to Figure 11 When an extremely large short-circuit current is generated in the circuit, the two sets of moving iron core components move simultaneously. The shunt moving iron core body 141 is attracted first due to its low damping, pulling the conductive plate 21 into contact with the conductor 25 to conduct, ensuring that a parallel circuit is formed next to the bimetallic element 23 in the shortest time possible, allowing most of the short-circuit current to flow through the conductor 25, so that only a very small current flows through the bimetallic element 23 due to its high resistance. Therefore, the heat generated is small and the thermal shock is small, thereby ensuring that the bimetallic element 23 will not be deformed or burned; and referring to Figure 12 At the same time, the instantaneous moving iron core body 151 pulls the transmission part 121, and then pushes the striking part 13 to hit the traction rod 4. Subsequently, due to the damping effect of the tripping force on the traction rod 4, the traction rod 4 slightly lags the tripping action, causing the mechanism to cut off the circuit and achieve a higher breaking index under small current specifications.

[0081] Reference Figure 13 The incoming line terminal 5 is connected or disconnected with the moving contact 26 through the static contact 51 to achieve the circuit on or off effect.

[0082] The conductor 25 is connected to the shunt contact 7, the shunt branch is energized, and is connected in parallel with the bimetallic element 23; the conductor 25 is disconnected from the shunt contact 7, the shunt branch is de-energized, and the bimetallic element 23 is in series in the circuit.

[0083] It is then connected to the magnetic release coil 8 and the output terminal 9.

[0084] When the magnetic trip coil 8 is in the on-state and a short-circuit current flows through the circuit, the electromagnetic attraction generated by the magnetic trip coil 8 only moves the momentary moving iron core 100 in the magnetic trip, pushing the operating mechanism 6 to trip. The operating mechanism 6 then pushes the moving contact 26, disconnecting the circuit. Due to insufficient attraction, the shunt moving iron core 200 does not move, and the bimetallic element 23 remains in series with the circuit, with all current flowing through the bimetallic element 23.

[0085] When an extremely large short-circuit current flows through the circuit, the electromagnetic attraction generated by the magnetic trip coil 8 causes the instantaneous moving iron core 100 and the shunt moving iron core 200 in the magnetic trip to move simultaneously. Due to its relatively low resistance, the shunt moving iron core 200 first pulls the shunt contact 7 to connect with the conductor 25, achieving a parallel shunting effect. Simultaneously, the instantaneous moving iron core 100 slightly delays and pushes the operating mechanism 6 to release the trip. The operating mechanism 6 pushes the moving contact 26, disconnecting the circuit.

[0086] When the electromagnetic attraction generated by the flowing current is not large enough, the magnetic release does not move, and the current in the circuit all flows through the bimetallic element 23 .

[0087] 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 short-circuit parallel shunt type thermal magnetic release, characterized in that: It comprises a moving iron core structure (1), a conductive structure (2) and a magnetic yoke structure (3); The magnetic yoke structure (3) is connected to the conductive structure (2), and the magnetic yoke structure (3) includes a static iron core (35); The moving iron core structure (1) comprises a striking mechanism, a shunt moving iron core assembly (14) and an instantaneous moving iron core assembly (15); the shunt moving iron core assembly (14) and the instantaneous moving iron core assembly (15) are both connected to the yoke structure (3); the shunt moving iron core assembly (14) and the instantaneous moving iron core assembly (15) are both distributed relative to the static iron core (35); and the instantaneous moving iron core assembly (15) is connected to the striking mechanism at one end away from the static iron core (35); The conductive structure (2) comprises a conductive plate (21), a coil conductive member (22), a bimetallic element (23), a soft-connected conductive member (24), and a conductor (25); one end of the conductor (25) is connected to the bimetallic element (23); one end of the soft-connected conductive member (24) is connected to the bimetallic element (23), and the other end is connected to the conductive plate (21); the conductive plate (21) is connected to the shunt flow core assembly (14), and the conductive plate (21) is connected to the coil conductive member (22); The coil conductive member (22) is wound around the outer sides of the shunt moving iron core assembly (14), the instantaneous moving iron core assembly (15) and the static iron core (35), and generates a magnetic field when energized; The split moving iron core assembly (14) is used to move toward the static iron core (35) under the traction of the magnetic field, so as to make the conductive plate (21) contact and conduct with the conductor (25) and realize the parallel connection of the conductor (25) and the bimetallic element (23); The instantaneous moving iron core components (15) are used to move toward the static iron core (35) under the traction of the magnetic field, and drive the striking mechanism to strike the external traction rod (4).

2. The short-circuit parallel shunt type thermal magnetic release according to claim 1, characterized in that: The shunt flow core assembly (14) includes a shunt flow core body (141) and a first compression spring (142). One end of the shunt flow core body (141) is connected to the conductive plate (21), and the other end is connected to the static iron core (35) through the first compression spring (142). The shunt flow core body (141) is used to drive the conductive plate (21) to contact and conduct with the conductor (25) through the magnetic force of the magnetic field.

3. The short-circuit parallel shunt type thermal magnetic release according to claim 2, characterized in that: The instantaneous moving iron core assembly (15) comprises an instantaneous moving iron core body (151), a second compression spring (152) and a linkage shaft (153); one end of the instantaneous moving iron core body (151) is connected to the striking mechanism via the linkage shaft (153), and the other end of the instantaneous moving iron core body (151) is connected to the static iron core (35) via the second compression spring (152); the instantaneous moving iron core body (151) is used to drive the striking mechanism to strike the traction rod (4) through the magnetic force of the magnetic field.

4. The short-circuit parallel shunt type thermal magnetic release according to claim 3, characterized in that: The moving iron core structure (1) further includes an upper mounting seat (11), and the upper mounting seat (11) is connected to the magnetic yoke structure (3); The striking mechanism comprises a transmission component (12) and a striking member (13), wherein the transmission component (12) is connected to the linkage shaft (153), and the transmission component (12) is connected to the striking member (13), and the transmission component (12) is used to drive the striking member (13) to strike the traction rod (4); The striking member (13) is slidably connected to the upper mounting seat (11).

5. The short-circuit parallel shunt type thermal magnetic release according to claim 4, characterized in that: The transmission assembly (12) includes a transmission member (121) and a rotating shaft (122). The transmission member (121) is rotatably connected to the upper mounting seat (11) via the rotating shaft (122), and the transmission member (121) is connected to the instantaneous moving iron core body (151) via the linkage shaft (153). An insertion portion is provided at one end of the transmission member (121) away from the instantaneous moving iron core body (151). The insertion portion is inserted into the through slot of the striking member (13) to drive the striking member (13) to move.

6. The short-circuit parallel shunt type thermal magnetic release according to claim 4, characterized in that: The yoke structure (3) further comprises a lower mounting seat (31), a yoke body (32), a magnetic cap (33) and a coil sleeve (34); the yoke body (32) is provided in the lower mounting seat (31), and the lower mounting seat (31) is detachably connected to the upper mounting seat (11); One end of the coil sleeve (34) is connected to the yoke body (32), and the other end of the coil sleeve (34) is connected to the magnetic cap (33), and the shunt moving iron core assembly (14) and the instantaneous moving iron core assembly (15) are arranged in the coil sleeve (34); The magnetic cap (33) is position-limitingly connected to the magnetic yoke body (32).

7. The short-circuit parallel shunt type thermal magnetic release according to claim 6, characterized in that: The shunt moving iron core body (141) is sleeved on the outer side of the instantaneous moving iron core body (151), and one end of the instantaneous moving iron core body (151) away from the static iron core (35) passes through the conductive plate (21).

8. The short-circuit parallel shunt type thermal magnetic release according to claim 1, characterized in that: The conductive structure (2) further includes a moving contact (26) and an outlet terminal (27), wherein the moving contact (26) is connected to the conductor (25); The outlet terminal (27) is connected to an end of the coil conductive member (22) away from the conductive plate (21).

9. The short-circuit parallel shunt type thermal magnetic release according to claim 1, characterized in that: One end of the bimetallic element (23) is provided with a bimetallic adjustment screw (231), and the other end of the bimetallic element (23) is connected to the conductor (25) via a rivet (232).

10. The short-circuit parallel shunt type thermal magnetic release according to claim 1, characterized in that: The conductive plate (21) is provided with a connection hole (211); A connecting portion is provided on the top of the shunt moving iron core assembly (14), and the shunt moving iron core assembly (14) is fixedly connected to the connecting hole (211) via the connecting portion.

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