Electromagnetic release and circuit breaker

Abstract

The electromagnetic release comprises a shell, an ejector rod and a driving mechanism, the shell comprises a top wall and a pair of mounting walls, the top wall is arranged in the first direction and provided with a driving hole, the central axis of the driving hole is parallel to the second direction, the pair of mounting walls are opposite in the third direction in a spaced mode, and at least one mounting wall is connected with the top wall; the driving mechanism is located between the pair of mounting walls and comprises a magnet yoke, a coil assembly, an armature and a magnet, the magnet yoke and the coil assembly are matched to drive the armature to act in the shell so as to drive the ejector rod, the magnet and the coil assembly are arranged side by side in the first direction, and in the third direction, the thickness of the magnet is smaller than the width of the magnet yoke; at least one installation wall is provided with an insertion groove, the magnet is inserted and limited in the insertion groove, at least one installation wall is provided with a limiting groove, and the edge of the magnet yoke is limited in the limiting groove of the insertion groove. According to the utility model, the magnet and the magnet yoke are directly inserted into the shell in a limiting manner, so that the motor has the advantages of high stability and simplicity and convenience in assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage electrical apparatus, concretely relates to an electromagnetic release and circuit breaker. BACKGROUND

[0002] The circuit breaker is a kind of low voltage electrical apparatus with wide application, and the electromagnetic release is an important component in the circuit breaker with leakage protection function, when the leakage current appears in the main line connected to the circuit breaker, the electromagnetic release triggers the operating mechanism in the circuit breaker to release, and the existing electromagnetic release has the following defects: first, most of the magnets are riveted, laser spot welded or glued, which is complicated to operate and increases assembly steps;Second, the impact of armature will inevitably cause wear, resulting in the reduction and failure of the performance of electromagnetic release, affecting the service life and reliability of the product. SUMMARY

[0003] The utility model discloses a kind of electromagnetic release and circuit breaker to overcome at least one defect of prior art.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides an electromagnetic release, including shell, jacks and drive mechanism, the shell includes top wall and a pair of installation wall, the top wall is along first direction and is equipped with drive hole, the center axis of drive hole is parallel to second direction, a pair of installation wall is spaced apart in third direction, and at least one installation wall is connected with top wall, first direction, second direction and third direction are perpendicular to each other, the drive mechanism is located between a pair of installation wall, the drive mechanism includes magnetic yoke, coil assembly, armature and magnet, the magnetic yoke is cooperated with coil assembly and drives armature to act in shell, for driving jacks to slide in drive hole, the magnet is arranged side by side with coil assembly in first direction, and in third direction, the thickness of magnet is less than the width of magnetic yoke, at least one installation wall is equipped with slot, and the magnet is inserted and limited in slot, at least one installation wall is equipped with limit slot, and the edge of magnetic yoke is limited in slot limit slot.

[0006] Preferably, the magnet is externally sleeved with a cover, and the magnet is inserted into the slot through the cover.

[0007] Preferably, the same outer side wall of the cover is provided with at least one insertion part, and the installation wall is provided with a slot corresponding to the insertion part.

[0008] Preferably, one of the mounting walls is provided with a first protrusion, a middle portion of the first protrusion is provided with two insertion slots arranged in the second direction, the shell is provided with two insertion parts, each of the insertion parts is inserted into one of the insertion slots, the other mounting wall is provided with a third protrusion, and the edge of the magnetic yoke and / or the side of the shell opposite to the insertion parts abuts against the third protrusion.

[0009] Preferably, the mounting wall is provided with a positioning shaft, and the edge of the magnet is provided with a positioning slot, the positioning shaft is inserted into the positioning slot.

[0010] Preferably, in the first direction, the width of the magnet is not completely equal, and the inner diameter of the insertion slot corresponding to the magnet is not completely equal.

[0011] Preferably, the mounting wall is provided with a protruding second protrusion, the interval between two adjacent second protrusions on the same mounting wall in the first direction forms an insertion slot, the mounting wall is provided with a protruding third protrusion, and the edge of the magnetic yoke and / or the side wall of the magnet abuts against the third protrusion.

[0012] Preferably, at least one third protrusion is arranged in the insertion slot, the third protrusion is arranged in the insertion slot for abutting against the side wall of the magnet, and the protruding height of the third protrusion in the third direction is smaller than that of the second protrusion.

[0013] Preferably, the mounting wall is provided with a limiting protrusion, and in the first direction, a limiting slot is formed between two adjacent limiting protrusions on the same mounting wall.

[0014] Preferably, the shell comprises two sub-shells, the two sub-shells are slidably assembled in the third direction, and each of the sub-shells comprises at least one mounting wall.

[0015] Preferably, one of the sub-shells comprises a bottom wall and a mounting wall vertically connected to the bottom wall, and the other sub-shell comprises a top wall, a mounting wall and a pair of side walls, the pair of side walls are oppositely connected to the top wall and the mounting wall in the first direction, and the top wall and the bottom wall are oppositely arranged in the second direction.

[0016] Preferably, a buffer assembly is further arranged in the shell, the buffer assembly is arranged between the driving mechanism and the top rod in the second direction, and the side of the buffer assembly opposite to the top rod is limitedly matched with the coil assembly.

[0017] Preferably, the driving mechanism further comprises a support, the magnetic yoke is fixed to the support, the support and the magnetic yoke are jointly limited, the armature is slidably supported on the support, and a restoring member is connected between the support and the armature.

[0018] The utility model also provides a circuit breaker, including the shell, be provided with operating mechanism in the shell, still be provided with electromagnetic release as above in the shell, the top rod and operating mechanism cooperation.

[0019] The electromagnetic release and the circuit breaker have the advantages that the magnet and the yoke are directly limited and inserted into the shell, and are stable and easy to assemble.

[0020] In addition, the magnet is sleeved with the cover, and the cover is inserted with the shell, so that the magnet is assembled conveniently, is stable, and has small abrasion.

[0021] In addition, the magnet is inserted with the positioning shaft through the positioning groove, and the cooperation stability of the magnet and the shell is further improved.

[0022] In addition, the width of the magnet is changed, and the inner diameter of the slot is changed, so that the cooperation stability of the magnet and the shell is further improved.

[0023] In addition, the impact force between the buffer rod and the armature is buffered through the buffer assembly, so that the performance is not reduced and is not invalid, and the buffer assembly can be matched with the limiting coil frame, so that the assembly stability is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the electromagnetic release of the utility model;

[0025] Figure 2 is an exploded schematic view of the first embodiment of the utility model;

[0026] Figure 3 is a schematic view of the internal structure of the first embodiment of the utility model;

[0027] Figure 4 is a schematic view of the structure of the first embodiment of the utility model after removing the shell;

[0028] Figure 5 is a schematic view of the structure of the first embodiment of the utility model after removing the shell and the mounting plate;

[0029] Figure 6 is a schematic view of the structure of the yoke, the coil frame, the magnet and the cover of the first embodiment of the utility model;

[0030] Figure 7 is Figure 6 a bottom view;

[0031] Figure 8 is a schematic view of the structure of the magnet and the cover of the first embodiment of the utility model;

[0032] Figure 9 is a schematic view of the structure of the cover of the first embodiment of the utility model;

[0033] Figure 10is the structural schematic view of the second split shell body of the first embodiment of the utility model;

[0034] Figure 11 is the structural schematic view of the first split shell body of the first embodiment of the utility model;

[0035] Figure 12 is the exploded schematic view of the second embodiment of the utility model;

[0036] Figure 13 is the internal structure schematic view of the second embodiment of the utility model;

[0037] Figure 14 is the magnet structure schematic view of the second embodiment of the utility model;

[0038] Figure 15 is the structural schematic view of the second split shell body of the second embodiment of the utility model;

[0039] Figure 16 is the exploded schematic view of the third embodiment of the utility model;

[0040] Figure 17 is the internal structure schematic view of the third embodiment of the utility model;

[0041] Figure 18 is the magnet structure schematic view of the third embodiment of the utility model;

[0042] Figure 19 is the structural schematic view of the second split shell body of the third embodiment of the utility model;

[0043] Reference signs:

[0044] 1-shell, 101-first split shell body, 102-second split shell body, 11-top wall, 111-driving hole, 12-bottom wall, 13-mounting wall, 14-side wall, 15-slot, 151-first boss, 152-second boss, 16-third boss, 17-limiting groove, 171-limiting boss, 18-positioning shaft, 2-driving mechanism, 21-coil framework, 22-magnetic yoke, 23-iron core, 24-magnet, 241-positioning groove, 25-return element, 26-supporting element, 27-enclosure, 271-plug-in part, 3-buffer assembly, 31-mounting plate, 32-buffer plate 32, 4-top rod. DETAILED DESCRIPTION

[0045] The following embodiments are further illustrated by the accompanying drawings, which further illustrate the specific implementation of the electromagnetic release and circuit breaker of the utility model. The electromagnetic release and circuit breaker of the utility model are not limited to the description of the following embodiments.

[0046] As Figure 1As shown, the electromagnetic tripping device comprises a housing 1, a drive hole 111 is formed on one side of the housing 1, a top rod 4 is slidingly assembled in the drive hole 111, a driving mechanism 2 is assembled in the housing 1, the driving mechanism 2 comprises a magnetic yoke 22, a coil assembly, an armature 23 and a magnet 24, the coil assembly comprises a coil framework 21 and a coil wound outside the coil framework 21, the armature 23 is rotatably assembled in the housing 1, the coil of the coil assembly is energized to cooperate with the magnetic yoke 22 to drive the armature 23 to act, the top rod 4 is driven by the armature 23 to slide in the drive hole 111, when the electromagnetic tripping device is arranged in a circuit breaker, the top rod 4 triggers the operating mechanism to trip, the magnet 24 is arranged side by side with the coil assembly, the magnet 24 attracts the armature 23 to keep the armature 23 and the magnetic yoke 22 in the original state.

[0047] Generally, as shown in Figure 2 、 3 , 12, 13, 16 and 17, the driving mechanism 2 further comprises a support 26 and a reset member 25, wherein the support 26 is arranged in the housing 1, the magnetic yoke 22 can be fixedly connected with the support 26, the armature 23 is rotatably supported on the support 26, and the two ends of the reset member 25 are connected with the armature 23 and the housing 1 respectively for resetting the armature 23.

[0048] In addition, a buffer assembly 3 is further arranged in the housing 1, the buffer assembly 3 is arranged between the driving mechanism 2 and the top rod 4, and the buffer assembly 3 generally comprises a buffer plate 32, the buffer plate 32 is located between the armature 23 and the top rod 4, and the buffer plate 32 is drivingly connected between the armature 23 and the top rod 4, so as to buffer the impact between the top rod 4 and the armature 23, thereby avoiding the impact force between the top rod 4 and the armature 23.

[0049] Specifically, the housing 1 generally comprises a top wall 11, a bottom wall 12, a pair of mounting walls 13 and a pair of side walls 14, wherein the top wall 11 and the bottom wall 12 are spaced apart and opposite to each other, the pair of mounting walls 13 and the pair of side walls 14 are connected between the top wall 11 and the bottom wall 12, for the convenience of description, the length, the height and the thickness of the housing 1 are taken as three mutually perpendicular first direction, second direction and third direction, wherein the plane where the top wall 11 and the bottom wall 12 are located is parallel to the first direction, the top wall 11 and the bottom wall 12 are spaced apart and opposite to each other in the second direction, the drive hole 111 is formed on the top wall 11, that is, the central axis of the drive hole 111 is parallel to the second direction, the pair of mounting walls 13 are spaced apart and opposite to each other in the third direction, the pair of side walls 14 are spaced apart and opposite to each other in the first direction, and the plane where each mounting wall 13 and side wall 14 is located is parallel to the second direction, in the third direction, the driving mechanism 2 is located between the pair of mounting walls 13, the thickness of the magnet 24 is less than the width of the magnetic yoke 22, and the magnet 24 and the coil assembly are arranged side by side in the first direction.

[0050] As shown in Figure 10 、 15As shown in Figs. 19, the improvement of the present application is that the at least one mounting wall 13 is provided with the slot 15, the magnet 24 is inserted and limited in the slot 15, the at least one mounting wall 13 is provided with the limiting slot 17, the edge of the yoke 22 is inserted and limited in the limiting slot 17, in this way, the magnet 24 and the yoke 22 are directly inserted and limited in the shell 1, which has the advantages of high stability and simple assembly.

[0051] Further, the magnet 24 is improved to improve the limiting cooperation with the shell 1, for example, as shown in Figs. Figures 3-9 , a cover 27 is sleeved outside the magnet 24, the cover 27 and the shell 1 are inserted and limited, which can ensure the stability of the limiting and avoid wearing the magnet 24, or, as shown in Figs. Figure 13 、 14 , 17 and 18, the thickness of the magnet 24 in the third direction is ensured, the width of the magnet 24 in the first direction is changed, the inner diameter of the slot 15 corresponding to the magnet 24 is further changed, by forming the magnet 24 and the slot 15 which are not completely regular, the cooperation stability can also be improved.

[0052] In combination with Figures 1-11 , a first embodiment of an electromagnetic release is provided.

[0053] As shown in Figs. Figures 1-3 , the electromagnetic release comprises a shell 1, the shell 1 is a closed cuboid structure, the shell 1 comprises a top wall 11, a bottom wall 12, a pair of mounting walls 13 and a pair of side walls 14, wherein the top wall 11 and the bottom wall 12 are respectively arranged along the first direction, and the top wall 11 and the bottom wall 12 are spaced apart and opposite in the second direction, the pair of mounting walls 13 are spaced apart and opposite in the third direction, and the pair of side walls 14 are spaced apart and opposite in the first direction, preferably, the shell 1 of the embodiment is spliced by two sub-shells, for the convenience of description, the two sub-shells are divided into a first sub-shell 101 and a second sub-shell 102, wherein the first sub-shell 101 comprises the bottom wall 12 and one mounting wall 13, the second sub-shell 102 comprises the top wall 11, the other mounting wall 13 and the pair of side walls 14, the middle part of the top wall 11 is provided with a driving hole 111, and a top rod 4 is slidably arranged in the driving hole 111.

[0054] In the embodiment, as shown in Figs. Figure 10 、 11 , the middle part of one mounting wall 13 of the shell 1 is provided with a first boss 151 protruding in the third direction, the middle part of the first boss 151 is provided with two slots 15 arranged in the second direction, Figure 10In the middle, the slot 15 is located on the second sub-shell 102, and the slot 15 is used to insert the limiting magnet 24; at least one mounting wall 13 is provided with a limiting boss 171. In this embodiment, the mounting wall 13 located on the second sub-shell 102 is provided with a limiting boss 171. In the first direction, a limiting groove 17 is formed between two adjacent limiting bosses 171 on the same mounting wall 13. The limiting groove 17 is used to insert the magnetic yoke 22. The shape of the limiting boss 171 is not specifically limited.

[0055] like Figures 2-5 As shown, a drive mechanism 2 and a buffer assembly 3 are provided inside the housing 1. The top rod 4, the buffer assembly 3 and the drive mechanism 2 are arranged sequentially in the housing 1 along the second direction. The drive mechanism 2 and the buffer assembly 3 can be pre-assembled. The drive mechanism 2 is located on the bottom wall 12. At least one of the mounting walls 13 is provided with a slot 15. The magnet 24 can be limited and inserted into the slot 15. At least one mounting wall 13 is provided with a limiting groove 17. The edge of the magnetic yoke 22 is limited within the limiting groove 17. When the first sub-housing 101 and the second sub-housing 102 are assembled into the housing 1, the drive mechanism 2 and the magnetic yoke 22 are respectively limited between a pair of mounting walls 13.

[0056] like Figures 3-7 As shown, the drive mechanism 2 includes a magnetic yoke 22, a coil assembly, an armature 23, a magnet 24, and a support member 26. The magnetic yoke 22 has an overall U-shaped structure. The middle part of the magnet 24 is disposed on the bottom wall 12 along a second direction (perpendicular to the bottom wall 12). The coil assembly includes a coil frame 21 and a coil wound around the outside of the coil frame 21. In a first direction, one end of the magnetic yoke 22 passes through the coil frame 21, and the other end of the magnetic yoke 22 is spaced apart from the coil frame 21 in the first direction. The support member 26 is disposed along the second direction and located on the side of the magnetic yoke 22 opposite to the coil frame 21. The support member 26 and the magnetic yoke 22 can be jointly confined within a limiting groove 17. Both ends of the magnetic yoke 22 serve as attractive parts. The armature 23 is slidably mounted on the support member 26 approximately along the first direction. Figure 3 , 4 In the first direction, the armature 23 is arranged along the first direction. The direction of movement of the armature 23 is towards or away from the attraction part. When the coil is energized, the magnetic field generated by the attraction part can drive the armature 23 to move within the housing 1. The magnet 24 is arranged side by side with the coil assembly. That is, in the first direction, the magnet 24 is located between the other end of the coil frame 21 and the magnetic yoke 22. In the third direction, the thickness of the magnet 24 is less than the width of the middle part of the magnetic yoke 22. One end of the magnet 24 is used to reset the armature 23. That is, before the coil is de-energized, the magnet 24 attracts the armature 23, so that the armature 23 and the two attraction parts of the magnetic yoke 22 remain in contact. Furthermore, a reset member 25 is connected to one end of the support member 26 and the armature 23. The reset member 25 is a spring. The reset member 25 stores energy when the coil is energized and releases energy after the coil is de-energized to reset the armature 23.

[0057] In the embodiment, the armature 23 and the support 26 also adopt the prior art, that is, the armature 23 is in a plate structure, as shown in the drawings, the support 26 includes a vertical plate arranged along the second direction, one end of the vertical plate is provided with two legs arranged along the second direction, so that the one end of the vertical plate forms a U-shaped groove, one end of the armature 23 is slidingly supported in the U-shaped groove, the other end of the vertical plate is provided with a support plate fixed on the bottom wall 12, one end of the reset member 25 is connected to the support plate, and the other end is connected to the armature 23. Figures 3-5

[0058] In the embodiment, the driving mechanism 2 further includes a cover 27, as shown in the drawings, Figure 6 8 and 9, the cover 27 is in a square tube structure, the cover 27 is sleeved outside the magnet 24, in the third direction, the thickness of the cover 27 is greater than the width of the middle part of the yoke 22, the outer side wall of the cover 27 is provided with two plug-in parts 271, in the drawings, the plug-in part 271 is in a boss structure formed by the surface of the cover 27, each plug-in part 271 is plugged into a corresponding plug-in groove 15, so that the magnet 24 is limited in the plug-in groove 15 through the plug-in of the cover 27, of course, the number of the plug-in part 271 and the plug-in groove 15 can also be one or more than three.

[0059] Further, the first sub-shell 101 is also provided with a positioning boss, the positioning boss can abut against the edge of the yoke 22 and / or the side of the cover 27 opposite to the plug-in part 271, the number and position of the positioning boss can be adjusted according to actual needs, for example, the contact surface of the positioning boss can have a bevel or a fillet, which is convenient for abutting against the yoke 22 and the cover 27. It should be noted that when both the mounting plates 31 are provided with the plug-in groove 15, the cover 27 is limited and plugged into the two mounting plates 31, at this time, the third boss 16 can not abut against the outer side wall of the cover 27; in addition, when the positioning boss and the limiting boss 171 are located on the same mounting wall 13, in the third direction, the protruding height of the positioning boss is less than the height of the limiting boss 171.

[0060] Preferably, as shown in the drawings, Figure 2 two sub-shells are connected by buckling, that is, in the embodiment, the first sub-shell 101 and the second sub-shell 102 are connected by buckling, among them, the bottom wall 12 and the side wall 14 and / or the mounting wall 13 located on the second sub-shell 102 are connected by buckling, which is convenient for disassembling and assembling the two sub-shells; further, the edge of one of the sub-shells is provided with a sliding groove, and the edge of the other sub-shell is slidingly plugged into the sliding groove, so as to ensure the edge sealing performance and cooperation stability of the two sub-shells.

[0061] In combination with Figure 2 11 ​​​A first sub-housing 101 structure applied in the embodiment is provided, the first sub-housing 101 includes a bottom wall 12 of a rectangular plate body, one side edge of the bottom wall 12 is provided with a mounting wall 13, the mounting wall 13 is a rectangular plate body structure, so that the first sub-housing 101 as a whole has an L-shaped structure, the edge thickness of the mounting wall 13 of the first sub-housing 101 is preferably thinned, so as to facilitate sliding insertion with a sliding groove provided on a second sub-housing 102, and the sliding groove can avoid occupying a larger space, a side surface of the mounting wall 13 facing the bottom wall 12 is provided with three third bosses 16, two of which are arranged in the second direction and used for abutting against one side of the cover 27 opposite to the insertion part 271, and the other third boss 16 is provided with an inclined surface used for limiting and abutting against the edge of the magnetic yoke 22. An edge of the bottom wall 12 is provided with a raised edge protruding from the bottom wall 12 in the second direction, and a buckle structure can be arranged on the raised edge, preferably, the buckle is arranged on the raised edge of the bottom wall 12 away from the mounting wall 13 of the first sub-housing 101.

[0062] In combination Figure 2 , 3 and 10, a second sub-housing 102 structure applied in the embodiment is provided, the second sub-housing 102 includes a top wall 11 of a rectangular plate body, three adjacent side edges of the top wall 11 are respectively connected with a side wall 14, among which the side wall 14 located in the middle position serves as the mounting wall 13, and the remaining pair of side walls 14 are spaced apart in the first direction, a rectangular first boss 151 and a plurality of limiting bosses 171 are arranged in the middle part of the mounting wall 13, the middle part of the first boss 151 is provided with two grooves arranged in the second direction, each groove serves as an insertion slot 15, and the interval of the adjacent two limiting bosses 171 in the first direction forms a limiting slot 17, the edge of the magnetic yoke 22 and the support 26 are limited and inserted into the limiting slot 17. In addition, a third boss 16 can be arranged in the limiting slot 17, the protruding height of the third boss 16 is less than the protruding height of the limiting boss 171, and the third boss 16 can abut against the edge of the magnetic yoke 22 and the edge of the support 26, thereby improving the cooperation stability of the housing 1 with the magnetic yoke 22 and the support 26.

[0063] In the embodiment, the side of the mounting wall 13 away from the top wall 11 is provided with a matching part in the form of a boss structure, which protrudes in the third direction. A buckle on the mounting wall 13 in the first sub-housing 101 is buckled to the matching part, facilitating the disassembly and assembly of the first sub-housing 101 and the second sub-housing 102. In addition, the two side walls 14 connected to the second sub-housing 102 and the top wall 11 are provided with sliding grooves. On the pair of side walls 14, the sliding grooves are located at the edge positions away from the mounting wall 13. On the top wall 11, the sliding groove is located at the edge position of the top wall 11. When the first sub-housing 101 and the second sub-housing 102 are assembled, the edge of the mounting wall 13 of the first sub-housing 101 slides along the sliding groove and is inserted. After the assembly is completed, the mounting wall 13 of the first sub-housing 101 is limitingly inserted into the sliding groove, which is beneficial to ensuring the sealing and stability of the butt joint of the housing 1.

[0064] In the embodiment, as shown in Figures 2-5 The housing 1 is also provided with a buffer assembly 3 between the driving mechanism 2 and the top rod 4. The side of the buffer assembly 3 away from the top rod 4 is limitingly matched with the coil frame 21, that is, the buffer assembly 3 can limit the movement of the coil frame 21 in the second direction. In the embodiment, the buffer assembly 3 includes mounting plates 31 and a buffer plate 32. The number of the mounting plates 31 is two. The two mounting plates 31 are oppositely arranged in the third direction in the housing 1. The edges of the mounting plates 31 are used to abut against the coil frame 21, so as to further limit the coil frame 21 in the housing 1. For example, the edges of the mounting plates 31 are provided with a clamping groove and at least two pressing parts. The edges of the coil frame 21 can be clamped in the clamping groove. One of the pressing parts abuts against the coil frame 21, and the other pressing part is matched with the edge of the armature 23. Preferably, the pressing part matched with the coil frame 21 can adopt a rectangular boss, which is convenient for abutting against the coil frame 21. The pressing part matched with the armature 23 can adopt an L-shaped boss structure, so that the end of the L-shaped boss structure is matched with the two side edges of the armature 23, which is used to limit the movement track of the armature 23, so as to avoid the armature 23 from shaking excessively between the two mounting plates 31.

[0065] As shown in Figure 5 The buffer plate 32 can adopt the prior art. The buffer plate 32 is rotatably connected between the two mounting plates 31 and is drivingly connected between the top rod 4 and the armature 23. In the figure, the buffer plate 32 is arranged between the top rod 4 and the armature 23 in the first direction. One end of the buffer plate 32 is rotatably connected with the mounting plate 31. The top rod 4 corresponds to the middle part of the buffer plate 32 or the end away from the rotating end of the buffer plate 32. When the armature 23 is driven, the armature 23 drives the buffer plate 32 to rotate, so as to drive the top rod 4 to extend out of the driving hole 111. When the top rod 4 is reset, the top rod 4 can reset the armature 23 through the buffer plate 32. Therefore, the impact force between the top rod 4 and the armature 23 can be buffered through the buffer plate 32.

[0066] In combination Figure 1 , 12 -15 provides a second embodiment of the electromagnetic tripping device.

[0067] As shown in Figure 1 , the electromagnetic tripping device comprises a housing 1, which is a closed cuboid structure, the housing 1 comprises a top wall 11, a bottom wall 12, a pair of mounting walls 13 and a pair of side walls 14, wherein the top wall 11 and the bottom wall 12 are respectively arranged along the first direction, and the top wall 11 and the bottom wall 12 are spaced apart in the second direction, the pair of mounting walls 13 are spaced apart in the third direction, and the pair of side walls 14 are spaced apart in the first direction, the middle of the top wall 11 is provided with a driving hole 111, the second sub-housing 102 comprises the top wall 11, the other mounting wall 13 and the pair of side walls 14, the middle of the top wall 11 is provided with a driving hole 111, and the top rod 4 is slidably arranged in the driving hole 111.

[0068] In this embodiment, as shown in Figure 15 , the middle of one mounting wall 13 of the housing 1 is provided with a second boss 152 protruding in the third direction, the interval between the two adjacent second bosses 152 on the same mounting wall 13 in the first direction forms a slot 15, and at least one positioning shaft 18 is protruding on the mounting wall 13, the number of positioning shafts 18 can be one or more than two, preferably, the positioning shafts 18 are arranged in pairs on the mounting wall 13, each pair of positioning shafts 18 is spaced apart in the first direction, and in the third direction, the length of the positioning shaft 18 is greater than the protruding height of the second boss 152; At least one limiting boss 171 is provided on at least one mounting wall 13, in this embodiment, the limiting boss 171 is provided on the mounting wall 13 of the first sub-housing 101 and / or the second sub-housing 102, in the first direction, the limiting slot 17 is formed between the two adjacent limiting bosses 171 on the same mounting wall 13, and the shapes of the second boss 152, the positioning shaft 18 and the limiting boss 171 are not limited.

[0069] In this embodiment, as shown in Figure 12 , 13 , the driving mechanism 2 and the buffer assembly 3 are arranged in the housing 1, wherein the remaining structure is the same as that of the first embodiment except that the magnet 24 of the driving mechanism 2, in this embodiment, the magnet 24 is a cuboid, the thickness of the magnet 24 in the third direction is less than the width of the middle of the yoke 22, the edge of the magnet 24 is provided with a positioning slot 241, in this embodiment, the positioning slots 241 are arranged in pairs on the two side edges of the middle of the magnet 24, and each positioning shaft 18 is inserted and limited with a positioning slot 241.

[0070] In this embodiment, as shown in Figure 12 , 13As shown in FIGS. 15, the two sub-housings also adopt an assembled structure, and the two sub-housings are divided into a first sub-housing 101 and a second sub-housing 102, wherein the first sub-housing 101 comprises the bottom wall 12 and one mounting wall 13, the second sub-housing 102 comprises the top wall 11 of the rectangular plate body, and three adjacent side edges of the top wall 11 are respectively connected with one side wall 14, wherein the side wall 14 located in the middle position serves as the mounting wall 13, and the remaining pair of side walls 14 are spaced apart from each other in the first direction, and a plurality of second bosses 152 and a plurality of limiting bosses 171 are arranged in the mounting wall 13 of the first sub-housing 101 and / or the second sub-housing 102, and the interval between two adjacent second bosses 152 on the same mounting wall 13 in the first direction forms a slot 15, as shown in Figure 13 、 14 As shown in FIGS. 15, the two sub-housings also adopt an assembled structure, and the two sub-housings are divided into a first sub-housing 101 and a second sub-housing 102, wherein the first sub-housing 101 comprises the bottom wall 12 and one mounting wall 13, the second sub-housing 102 comprises the top wall 11 of the rectangular plate body, and three adjacent side edges of the top wall 11 are respectively connected with one side wall 14, wherein the side wall 14 located in the middle position serves as the mounting wall 13, and the remaining pair of side walls 14 are spaced apart from each other in the first direction, and a plurality of second bosses 152 and a plurality of limiting bosses 171 are arranged in the mounting wall 13 of the first sub-housing 101 and / or the second sub-housing 102, and the interval between two adjacent second bosses 152 on the same mounting wall 13 in the first direction forms a slot 15, as shown in Figure 14 ) the same boss can be shared by the second boss 152 and the limiting boss 171.

[0071] In the present embodiment, the mounting wall 13 of the first sub-housing 101 and / or the second sub-housing 102 can also be provided with a third boss 16, the protruding height of the third boss 16 is less than the protruding height of the limiting boss 171, and the third boss 16 can abut against the edge of the magnetic yoke 22 and the edge of the support 26, thereby improving the stability of the cooperation between the housing 1 and the magnetic yoke 22 and the support 26. For details, please refer to the arrangement of the third boss 16 in the first embodiment.

[0072] In addition, the first sub-housing 101 and the second sub-housing 102 also adopt a buckle connection, and the buckle connection manner can refer to the first embodiment. The first sub-housing 101 and the second sub-housing 102 can also adopt the sliding insertion manner of the first embodiment, so as to ensure the sealing performance and stability of the butt joint of the housing.

[0073] The third embodiment of the electromagnetic release is provided in combination with Figure 1 、 16 -19.

[0074] As shown in FIGS. 15, the two sub-housings also adopt an assembled structure, and the two sub-housings are divided into a first sub-housing 101 and a second sub-housing 102, wherein the first sub-housing 101 comprises the bottom wall 12 and one mounting wall 13, the second sub-housing 102 comprises the top wall 11 of the rectangular plate body, and three adjacent side edges of the top wall 11 are respectively connected with one side wall 14, wherein the side wall 14 located in the middle position serves as the mounting wall 13, and the remaining pair of side walls 14 are spaced apart from each other in the first direction, and a plurality of second bosses 152 and a plurality of limiting bosses 171 are arranged in the mounting wall 13 of the first sub-housing 101 and / or the second sub-housing 102, and the interval between two adjacent second bosses 152 on the same mounting wall 13 in the first direction forms a slot 15, as shown in Figure 1 、 16As shown, the electromagnetic tripping device comprises a shell, which is a closed cuboid structure, the shell comprises a top wall 11, a bottom wall 12, a pair of mounting walls 13 and a pair of side walls 14, wherein the top wall 11 and the bottom wall 12 are respectively arranged along the first direction, and the top wall 11 and the bottom wall 12 are spaced apart in the third direction, the pair of mounting walls 13 are spaced apart in the third direction, and the pair of side walls 14 are spaced apart in the first direction. Preferably, the shell 1 of the embodiment is spliced by two sub-shells, the top wall 11 is provided with a driving hole 111, and a top rod 4 is slidably arranged in the driving hole 111.

[0075] In the embodiment, a first boss 151 is arranged in the middle of one of the mounting walls 13 of the shell 1 in the third direction, and the middle of the first boss 151 is provided with two insertion slots 15 arranged in the second direction, the insertion slots 15 are used for limiting the magnet 24, and the widths of the two ends of the insertion slots 15 in the first direction are not equal. Figure 19 In the embodiment, the insertion slots 15 are arranged on the second sub-shell 102, and the insertion slots 15 have a structure of wide at one end and narrow at the other end; at least one of the mounting walls 13 is provided with a limiting boss 171, in the embodiment, the mounting walls 13 of the first sub-shell 101 and / or the second sub-shell 102 are provided with the limiting boss 171, and in the first direction, a limiting slot 17 is formed between the two adjacent limiting bosses 171 on the same mounting wall 13, the limiting slot 17 is used for limiting the magnetic yoke 22, and the shape of the limiting boss 171 is not limited.

[0076] As shown in the drawings, Figure 16 , 17 The shell 1 is provided with a driving mechanism 2 and a buffer assembly 3, wherein the structures except the magnet 24 of the driving mechanism 2 are the same as those of the first embodiment, in the embodiment, in the third direction, the thickness of the magnet 24 is smaller than the width of the middle of the magnetic yoke 22, in the first direction, the widths of the two ends of the magnet 24 are not equal to form a trapezoidal structure, and when the magnet 24 is limited and inserted into the insertion slot 15, the irregular shape can limit the movement of the magnet 24 in the second direction.

[0077] In the embodiment, as shown in the drawings, Figure 16 , 19As shown, the two sub-housings also adopt an assembled structure, for the convenience of description, the two sub-housings are divided into a first sub-housing 101 and a second sub-housing 102, wherein the first sub-housing 101 comprises a bottom wall 12 and an installation wall 13, the second sub-housing 102 comprises a top wall 11 of a rectangular plate body, three adjacent side walls of the top wall 11 are respectively connected with a side wall 14, wherein the side wall 14 located in the middle position serves as the installation wall 13, and the remaining pair of side walls 14 are spaced apart from each other in the first direction, a plurality of second bosses 152 and a plurality of limiting bosses 171 are arranged in the middle of the installation wall 13 of the first sub-housing 101 and / or the second sub-housing 102, wherein the interval between two adjacent second bosses 152 on the same installation wall 13 in the first direction forms a slot 15, the magnet 24 is inserted into the limiting slot 17, in the embodiment, the plurality of second bosses 152 are divided into at least two pairs, wherein one pair of second bosses 152 has the smallest interval in the first direction and is located away from the bottom wall 12, and the other pair of second bosses 152 has the largest interval in the first direction and is located close to the bottom wall 12, the interval between two adjacent limiting bosses 171 on the same installation wall 13 in the first direction forms a limiting slot 17, and the edge of the magnetic yoke 22 and the support 26 jointly limit the insertion into the limiting slot 17. It should be noted that when the second boss 152 is close to the limiting boss 171, the second boss 152 and the limiting boss 171 can share the same boss (see Figure 14 ).

[0078] In the embodiment, the installation wall 13 of the first sub-housing 101 and / or the second sub-housing 102 can also be provided with a third boss 16, the protruding height of the third boss 16 is less than the protruding height of the limiting boss 171, the third boss 16 can abut against the edge of the magnetic yoke 22 and the edge of the support 26, thereby improving the cooperation stability of the housing 1 with the magnetic yoke 22 and the support 26, and the first sub-housing 101 can adopt the structure in the first embodiment.

[0079] In addition, the first sub-housing 101 and the second sub-housing 102 also adopt a buckle connection, the buckle connection mode can refer to the first embodiment, and the first sub-housing 101 and the second sub-housing 102 can also adopt the sliding insertion mode of the first embodiment, so as to ensure the sealing property and stability of the butt joint of the housing 1.

[0080] The circuit breaker comprises a housing, at least one circuit breaker pole is arranged in the housing, an operating mechanism is arranged in at least one of the circuit breaker poles, all contact mechanisms in the circuit breaker poles are driven by the operating mechanism to perform opening and closing actions, the circuit breaker pole, the operating mechanism and the contact mechanism can adopt the prior art, and the electromagnetic release in the three embodiments is further arranged in the housing, the top rod 4 of the electromagnetic release is used to trigger the release of the operating mechanism, when the driving mechanism 2 in the electromagnetic release operates, the top rod 4 extends from the driving hole 111 to trigger the release of the operating mechanism, so that the contact mechanism of the circuit breaker is opened and de-energized.

[0081] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship when in use, and are merely for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description, and cannot be understood as indicating relative importance.

[0082] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, and all of these should be regarded as falling within the protection scope of the utility model.

Claims

1. An electromagnetic release comprising a housing (1), a top rod (4) and a drive mechanism (2), the housing (1) comprising a top wall (11) and a pair of mounting walls (13), the top wall (11) being arranged along a first direction and having a drive hole (111) formed therein, the center axis of the drive hole (111) being parallel to a second direction, the pair of mounting walls (13) being spaced apart from each other along a third direction and at least one of the mounting walls (13) being connected to the top wall (11), the first direction, the second direction and the third direction being perpendicular to each other, the drive mechanism (2) being located between the pair of mounting walls (13), the drive mechanism (2) comprising a magnetic yoke (22), a coil assembly, an armature (23) and a magnet (24), the magnetic yoke (22) cooperating with the coil assembly to drive the armature (23) to move within the housing (1) for driving the top rod (4) to slide within the drive hole (111), the magnet (24) being arranged side by side with the coil assembly along the first direction and along the third direction, and the thickness of the magnet (24) being less than the width of the magnetic yoke (22), characterized in that: At least one of the installation walls (13) is provided with a slot (15) in which the magnet (24) is inserted, and the at least one of the installation walls (13) is provided with a limiting slot (17) in which the edge of the magnetic yoke (22) is limited. ​ 2. The electromagnetic trip unit of claim 1, wherein: The magnet (24) is externally sleeved with a cover (27), and the magnet (24) is inserted into the slot (15) through the cover (27).

3. The electromagnetic trip unit of claim 2, wherein: The same outer side wall of the cover (27) is provided with at least one insertion part (271), and the installation wall (13) is provided with a slot (15) corresponding to the insertion part (271).

4. The electromagnetic trip unit of any one of claims 1-3, wherein: One of the installation walls (13) is provided with a first boss (151), the middle part of the first boss (151) is provided with two slots (15) arranged in a second direction, the cover (27) is provided with two insertion parts (271), each insertion part (271) is correspondingly inserted with one slot (15), and the other installation wall (13) is provided with a third boss (16), and the edge of the magnetic yoke (22) and / or the side of the cover (27) opposite to the insertion part (271) abuts against the third boss (16).

5. The electromagnetic trip unit of claim 1, wherein: The installation wall (13) is provided with a positioning shaft (18), and the edge of the magnet (24) is provided with a positioning slot (241), and the positioning shaft (18) is inserted into the positioning slot (241).

6. The electromagnetic trip unit of claim 1, wherein: In the first direction, the width of the magnet (24) is not completely equal, and the inner diameter of the slot (15) corresponding to the magnet (24) is not completely equal.

7. The electromagnetic trip unit of claim 1 or 5 or 6, wherein: The installation wall (13) is provided with a protruding second boss (152), and the interval between two adjacent second bosses (152) on the same installation wall (13) in the first direction forms a slot (15), the installation wall (13) is provided with a protruding third boss (16), and the edge of the magnetic yoke (22) and / or the side wall of the magnet (24) abuts against the third boss (16).

8. The electromagnetic trip unit of claim 7, wherein: The slot (15) is provided with at least one third boss (16) located in the slot (15) for abutting against the side wall of the magnet (24), and the protruding height of the third boss (16) in the third direction is less than that of the second boss (152).

9. The electromagnetic trip unit of claim 1, wherein: The installation wall (13) is provided with a limiting boss (171), and in the first direction, a limiting slot (17) is formed between two adjacent limiting bosses (171) on the same installation wall (13).

10. The electromagnetic trip unit of claim 1, wherein: The shell (1) comprises two sub-shells, and the two sub-shells are slidably assembled in a third direction, and each sub-shell comprises at least one installation wall (13).

11. The electromagnetic trip unit of claim 10, wherein: One of the sub-shells comprises a bottom wall (12) and an installation wall (13) vertically connected to the bottom wall (12), and the other sub-shell comprises a top wall (11), an installation wall (13) and a pair of side walls (14) oppositely connected to the top wall (11) and the installation wall (13) in the first direction, and the top wall (11) and the bottom wall (12) are oppositely spaced in the second direction.

12. The electromagnetic trip unit of claim 1, wherein: The shell (1) is further provided with a buffer assembly (3), which is located between the driving mechanism (2) and the ejector rod (4) in the second direction, and the side of the buffer assembly (3) facing away from the ejector rod (4) is in position-limiting cooperation with the coil assembly.

13. The electromagnetic trip unit of claim 1, wherein: The driving mechanism (2) further comprises a support (26), the magnetic yoke (22) is fixed on the support (26), and the support (26) and the magnetic yoke (22) are jointly limited, the armature (23) is slidingly supported on the support (26), and a reset member (25) is connected between the support (26) and the armature (23).

14. A circuit breaker comprising a housing in which is disposed an operating mechanism, characterised in that: The shell is further provided with the electromagnetic release as claimed in any one of claims 1-13, and the ejector rod (4) is in cooperation with the operating mechanism.

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