CN221304562U - Tripping mechanism and circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of low-voltage appliances, and discloses a tripping mechanism and a circuit breaker. The limiting piece comprises a supporting plate, an outer ring and an inner ring, wherein the outer ring and the inner ring are arranged on the supporting plate, the coil is abutted with the supporting plate, and the first end of the magnetic yoke is arranged in the outer ring; the oil cup is sequentially penetrated with the first ends of the coil, the inner ring and the magnetic yoke. According to the tripping mechanism provided by the utility model, the limiting piece can separate the magnetic yoke from the wiring row, so that short circuit between the magnetic yoke and the wiring row is effectively prevented. In addition, wear to establish the first end of coil, locating part's inner ring and yoke with the oil cup in proper order, and the coil supports in the backup pad of locating part, and the first end of yoke is arranged in the outer intra-annular, just can accomplish the equipment, and is simple and convenient.

Description

Tripping mechanism and circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a tripping mechanism and a circuit breaker.

Background

The hydraulic electromagnetic circuit breaker is one of the circuit breakers and has the double protection functions of overcurrent and short circuit, and the hydraulic electromagnetic circuit breaker tripping device is used for overload protection or short circuit protection of the circuit breaker.

The hydraulic electromagnetic tripping mechanism of the traditional hydraulic electromagnetic circuit breaker is simple in structural design, in order to ensure the compact structure of the circuit breaker, the wiring row of the circuit breaker is often close to the magnetic yoke in distance, and when overload current passes through or short circuit occurs in the circuit breaker, short circuit can occur between the magnetic yoke and the wiring row, so that the safety of a use point is affected.

Disclosure of utility model

An object of the present utility model is to provide a trip mechanism that effectively prevents shorting between a yoke and a wiring block.

To achieve the purpose, the utility model adopts the following technical scheme:

there is provided a trip mechanism comprising:

The limiting piece comprises a supporting plate, and an outer ring and an inner ring which are arranged on the supporting plate, wherein the outer ring is sleeved outside the inner ring;

a coil abutting the support plate;

a yoke, a first end of which is disposed within the outer ring;

And the oil cup sequentially penetrates through the coil, the inner ring and the first end of the magnetic yoke.

Optionally, the limiting part further comprises a fixing sleeve arranged on the outer peripheral side of the outer ring, the first end of the coil is arranged in the fixing sleeve in a penetrating mode, and the second end of the coil is used for being electrically connected with the wiring row.

Optionally, a yielding groove is formed in the peripheral side of the outer ring, and the first end of the magnetic yoke penetrates through the yielding groove and is arranged in the outer ring.

Optionally, the yoke includes a body plate, the body plate having an L-shape including a short side portion and a long side portion; wherein,

The short side part is arranged in the outer ring, and is attached to the end part of the inner ring towards one side surface of the supporting plate;

The bending plate comprises a first bending part connected with the long side part, a second bending part connected with the first bending part and a third bending part, wherein the bending direction of the second bending part and the bending direction of the third bending part are opposite to the bending direction of the first bending part, and the second bending part and the third bending part are parallel to the long side part and are staggered along the extending direction of the short side part.

Optionally, the method further comprises:

The armature is arranged at the second end of the magnetic yoke, and the first end of the armature is arranged above the end cover of the oil cup;

and the elastic piece is arranged between the armature and the magnetic yoke.

Optionally, the second end of the magnetic yoke is provided with a limit groove, the limit groove comprises two first side walls and two second side walls which are oppositely arranged, the first side walls are convexly provided with a first baffle at the opening of the limit groove, the second side walls are convexly provided with a second baffle at the opening of the limit groove, and a yielding channel is formed between the first baffle and the second baffle;

The two opposite sides of the armature are respectively provided with a clamping groove, the armature penetrates through the limiting groove, and the first side wall and the second side wall of the limiting groove are respectively arranged in the clamping grooves on the corresponding sides.

Optionally, the end face of the second baffle facing the first baffle is obliquely arranged from the bottom of the limit groove to the opening of the limit groove facing the second side wall.

Optionally, a distance H1 from an end of the first baffle toward the second baffle to the first sidewall is greater than or equal to a distance H2 from an end of the second baffle toward the first baffle to the second sidewall.

Optionally, a second end of the armature is provided with a limiting pin, and the limiting pin can be abutted with the magnetic yoke to limit rotation of the armature relative to the magnetic yoke.

Another object of the present utility model is to provide a circuit breaker, comprising:

An operating mechanism;

the trip mechanism according to any one of the above claims, provided corresponding to the operation mechanism;

The moving contact is connected with the operating mechanism;

the wire row is electrically connected with the moving contact through a coil of the tripping mechanism, and the wire row is arranged on the outer periphery side of an outer ring of a limiting piece of the tripping mechanism.

The beneficial effects are that:

According to the tripping mechanism provided by the utility model, the first end of the magnetic yoke is arranged in the outer ring, so that the magnetic yoke and the wiring row can be separated, and the short circuit between the magnetic yoke and the wiring row is effectively prevented. In addition, wear to establish the first end of coil, locating part's inner ring and yoke with the oil cup in proper order, and the coil supports in the backup pad of locating part, and the first end of yoke is arranged in the outer intra-annular, just can accomplish the equipment, and is simple and convenient.

According to the circuit breaker provided by the utility model, the magnetic yoke and the wiring row are separated by arranging the limiting piece of the tripping mechanism, so that the short circuit between the magnetic yoke and the wiring row is effectively prevented.

Drawings

FIG. 1 is a schematic view of a trip mechanism coupled to a wiring board according to the present utility model;

FIG. 2 is a schematic view of another view of the trip mechanism of the present utility model connected to a patch panel;

fig. 3 is a schematic view of a part of the structure of the circuit breaker provided by the utility model;

FIG. 4 is a schematic view of the structure within the housing provided by the present utility model;

FIG. 5 is a schematic view of a limiting member according to the present utility model;

FIG. 6 is a schematic view of yet another view of the trip mechanism coupled to a patch panel provided in accordance with the present utility model;

fig. 7 is a schematic structural view of a yoke according to the present utility model;

fig. 8 is an enlarged schematic view of a partial structure of a yoke provided by the present utility model;

fig. 9 is a schematic structural view of an armature provided by the present utility model.

In the figure:

10. An operating mechanism; 11. a traction rod; 20. a trip mechanism; 30. a moving contact; 40. a wiring row; 41. a groove; 42. a wiring hole; 43. a fixing hole; 50. a housing; 51. alternate channels; 52. a fixing groove; 60. a screw connection;

100. A limiting piece; 110. a support plate; 120. an outer ring; 121. a relief groove; 130. an inner ring; 140. a fixed sleeve;

200. an oil cup; 210. an end cap;

300. a coil; 301. a wire;

400. A yoke; 410. a main body plate; 4101. a second hanging hole; 411. a short side portion; 412. a long side portion; 4121. a limit groove; 41211. a first sidewall; 41212. a second sidewall; 4122. a first baffle; 4123. a second baffle; 4124. a yielding channel; 4125. a relief hole; 4126. a first protrusion; 4127. a second protrusion; 420. a bending plate; 421. a first bending part; 422. a second bending part; 423. a third bending part;

500. a transformer;

600. An armature; 610. a clamping groove; 620. a trip arm; 630. a limit foot; 640. a first hanging hole;

700. An elastic member.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The present embodiment provides a circuit breaker, which includes an operating mechanism 10, a trip mechanism 20, a moving contact 30, and a terminal block 40, as shown with reference to fig. 1 to 4. The operating mechanism 10 is disposed corresponding to the trip mechanism 20, the operating mechanism 10 is connected to the moving contact 30, and the moving contact 30 is electrically connected to the wiring bank 40. In this embodiment, the opening and closing actions of the moving contact 30 can be achieved by controlling the operating mechanism 10, and the tripping mechanism 20 can trigger the operating mechanism 10 to trip, so that the operating mechanism 10 drives the moving contact 30 to open.

Specifically, the operating mechanism 10 includes a traction rod 11, and the trip mechanism 20 can push the traction rod 11 to rotate the traction rod 11, so as to trip the operating mechanism 10 and drive the moving contact 30 to open. In this embodiment, the operation mechanism 10 is in the prior art, and the description of the present application is not repeated.

Further, the circuit breaker further includes a housing 50, the operating mechanism 10 and the trip mechanism 20 are disposed in the housing 50, and the wiring harness 40 extends from inside the housing 50 to outside the housing 50.

In the present embodiment, referring to fig. 1, 2, 5 and 6, the trip mechanism 20 includes a stopper 100, an oil cup 200, a coil 300 and a yoke 400. The limiting member 100 includes a supporting plate 110, and an outer ring 120 and an inner ring 130 disposed on the supporting plate 110, the coil 300 is abutted to the supporting plate 110, a first end of the magnetic yoke 400 is disposed in the outer ring 120, and the oil cup 200 sequentially penetrates through the coil 300, the inner ring 130 and the first end of the magnetic yoke 400.

The oil cup 200 is in the prior art, and the present application will not be described in detail.

The inner ring 130 and the oil cup 200 may be tightly fit in the shaft hole interference fit or the shaft hole transition fit.

The wire row 40 is electrically connected to the moving contact 30 through the coil 300, and the wire row 40 is disposed on the outer circumference side of the outer ring 120. Illustratively, the side of the wire row 40 facing the outer ring 120 is concavely provided with a groove 41, and by the arrangement of the groove 41, assembly interference can be avoided, and the wire row 40 can be closer to the limiting member 100, so that the compactness of the circuit breaker is effectively improved.

In this embodiment, the circuit breaker is configured by the limiting member 100 of the trip mechanism 20 to separate the yoke 400 from the wiring row 40, so as to realize electrical isolation, and effectively prevent shorting between the yoke 400 and the wiring row 40. Specifically, the first end of the yoke 400 is disposed in the outer ring 120, and the wire row 40 is disposed on the outer peripheral side of the outer ring 120, that is, the limiting member 100 can separate the yoke 400 from the wire row 40, so as to effectively prevent shorting between the yoke 400 and the wire row 40. In addition, the coil 300, the inner ring 130 of the limiting member 100 and the first end of the magnetic yoke 400 are sequentially penetrated through the oil cup 200, the coil 300 is propped against the supporting plate 110 of the limiting member 100, and the first end of the magnetic yoke 400 is arranged in the outer ring 120, so that the assembly is completed, and the assembly is simple and convenient.

Illustratively, to ensure a stable and reliable connection between the yoke 400 and the oil cup 200, the yoke 400 and the oil cup 200 may be in a tight fit in an interference fit in the shaft hole or a transition fit in the shaft hole. In this embodiment, the coil 300, the limiting member 100 and the yoke 400 are assembled together, and then the oil cup 200 is sequentially inserted through the coil 300, the inner ring 130 of the limiting member 100 and the first end of the yoke 400.

The yoke 400 may also be held stationary with the cup 200 by soldering, for example. The yoke 400 and the oil cup 200 may be in clearance fit with each other through a shaft hole. In this embodiment, the limiter 100 and the coil 300 are assembled together, then the oil cup 200 is inserted through the coil 300 and pressed into the inner ring 130 of the limiter 100, and the oil cup 200 is inserted through the first end of the yoke 400, and the yoke 400 and the oil cup 200 are welded together by soldering. Wherein, the limiting piece 100 and the magnetic yoke 400 are designed in a split type, so that the magnetic yoke 400 can not interfere in the process of pressing the oil cup 200 into the inner ring 130, and the magnetic yoke 400 is effectively prevented from deforming.

Of course, the yoke 400 may be fixed to the oil cup 200 in other manners, and the present application is not limited thereto.

Illustratively, the outer ring 120 and the inner ring 130 are annular, which facilitates the molding of the limiter 100.

In one possible embodiment, as shown in fig. 2, a side surface of the first end of the yoke 400 facing the support plate 110 is attached to the end of the inner ring 130, so as to facilitate positioning and assembling of the yoke 400 and the limiting member 100. Illustratively, the first end edge of the yoke 400 may be adhered to the inner wall of the outer ring 120, so as to effectively ensure positioning accuracy between the yoke 400 and the limiting member 100.

In a possible embodiment, as shown in fig. 1 and 5, the circumferential side of the outer ring 120 is provided with the relief groove 121, and the first end of the yoke 400 is threaded through the relief groove 121 and is disposed in the outer ring 120, i.e. when the yoke 400 is designed, the first end of the yoke 400 may be designed into a flat plate shape, so as to facilitate the molding of the yoke 400. In addition, at least one side edge of the yoke 400 may abut against a corresponding side wall of the relief groove 121 to form a positioning, so as to facilitate assembly of the yoke 400 and the limiting member 100.

In one possible embodiment, as shown in fig. 2 and 5, the limiting member 100 further includes a fixing sleeve 140 disposed on the outer circumferential side of the outer ring 120, a first end of the coil 300 is disposed through the fixing sleeve 140, and a second end of the coil 300 is used for electrically connecting the terminal block 40. In this embodiment, the first end of the coil 300 is threaded through the fixing sleeve 140, i.e. a limit is formed on the coil 300, so as to prevent the coil 300 from rotating around the oil cup 200, and realize positioning of the coil 300 along the circumferential direction of the oil cup 200.

In one possible embodiment, as shown in fig. 3, the first end of the coil 300 may be connected to the moving contact 30 by a wire 301. Wherein, the first end of the coil 300 passes through the fixing sleeve 140 and is electrically connected with the wire 301. Illustratively, the wire 301 may be connected to the coil 300 by soldering. In this embodiment, the trip mechanism 20 further includes a transformer 500, the first end of the wire 301 is connected to the first end of the coil 300, and the second end of the wire 301 may be threaded through the transformer 500 and connected to the moving contact 30. When the moving contacts 30 are provided in plurality, the wires 301 and the tripping mechanism 20 are provided in plurality and are in one-to-one correspondence with the moving contacts 30, and all the wires 301 are penetrated through one transformer 500 and are connected with the moving contacts 30 in one-to-one correspondence. Illustratively, the movable contact 30 may be provided as two or three.

In one possible embodiment, as shown in fig. 6, the wiring row 40 is provided with a wiring hole 42, and the second end of the coil 300 is inserted into the wiring hole 42 to achieve electrical connection. In the present embodiment, the second end of the coil 300 may be connected to the terminal block 40 by soldering. Illustratively, the wire row 40 is further provided with a fixing hole 43, and the wire row 40 can be fastened to the housing 50 by threading the fixing hole 43 through the threaded member 60 and being screwed with the housing 50.

In the present embodiment, referring to fig. 7, the yoke 400 includes a body plate 410, and the body plate 410 has an L-shape including a short side 411 and a long side 412. The short side 411 is a first end of the yoke 400, and the long side 412 is a second end of the yoke 400. In the present embodiment, the yoke 400 may be formed by press bending.

It can be appreciated that the short side 411 is disposed in the outer ring 120, and the short side 411 is disposed facing one side of the support plate 110 and is attached to the end of the inner ring 130.

Specifically, bending plates 420 are respectively disposed on two opposite sides of the long side portion 412, the bending plates 420 include a first bending portion 421 connected to the long side portion 412, and a second bending portion 422 and a third bending portion 423 connected to the first bending portion 421, the bending directions of the second bending portion 422 and the third bending portion 423 are opposite to those of the first bending portion 421, and the second bending portion 422 and the third bending portion 423 are parallel to the long side portion 412 and are staggered along the extending direction of the short side portion 411. Wherein, at least one inter-phase channel 51 is arranged in the shell 50, and a tripping mechanism 20 is respectively arranged in the inter-phase channel 51. In this embodiment, as shown in fig. 4, two opposite side walls of the interphase channel 51 are provided with fixing grooves 52, the cross section of the fixing grooves 52 is in a U shape, the second bending portion 422 and the third bending portion 423 are disposed in the fixing grooves 52 on the corresponding sides, the second bending portion 422 and the third bending portion 423 are disposed parallel to the long side portion 412 and are staggered along the extending direction of the short side portion 411, one of the two side walls of the fixing grooves 52 can be abutted against the second bending portion 422, the other one of the two side walls of the fixing grooves 52 can be abutted against the third bending portion 423, that is, the two side walls of the fixing grooves 52 clamp the second bending portion 422 and the third bending portion 423, the connection is stable and reliable, and the second bending portion 422 and the third bending portion 423 are effectively prevented from being separated from the fixing grooves 52.

In this embodiment, with continued reference to fig. 1 and 2, the trip mechanism 20 further includes an armature 600 and an elastic member 700. Wherein, the armature 600 is disposed at the second end of the magnetic yoke 400, that is, the armature 600 is disposed at the end of the long side portion 412 of the magnetic yoke 400, and the first end of the armature 600 is disposed above the end cap 210 of the oil cup 200; the elastic member 700 is disposed between the armature 600 and the yoke 400. In this embodiment, when an overload current passes through or a short circuit occurs in the circuit breaker, under the action of the coil 300, the end cap 210 of the oil cup 200 magnetically attracts the first end of the armature 600, so that the first end of the armature 600 is attracted to the end cap 210 of the oil cup 200, and the second end of the armature 600 pushes against the traction rod 11, so that the traction rod 11 rotates, and the operating mechanism 10 trips to drive the moving contact 30 to open, thereby achieving the purposes of protecting the electrical safety and the equipment safety. When the moving contact 30 is completed, the circuit breaker breaks the circuit, and the elastic member 700 drives the armature 600 to reset, i.e. the first end of the armature 600 is separated from the end cap 210 of the oil cup 200.

In one possible embodiment, as shown in fig. 7 and 8, the second end of the magnetic yoke 400 is provided with a limiting groove 4121, that is, the end of the long side portion 412 of the magnetic yoke 400 is provided with the limiting groove 4121, the limiting groove 4121 includes two opposite first side walls 41211 and second side walls 41212, the first side wall 41211 is provided with a first baffle 4122 protruding from the opening of the limiting groove 4121, the second side wall 41212 is provided with a second baffle 4123 protruding from the opening of the limiting groove 4121, and a yielding channel 4124 is formed between the first baffle 4122 and the second baffle 4123; the opposite two sides of the armature 600 are respectively provided with a clamping groove 610, the armature 600 is arranged in the limiting groove 4121 in a penetrating manner, and the first side wall 41211 and the second side wall 41212 of the limiting groove 4121 are respectively arranged in the clamping grooves 610 on the corresponding sides, namely the clamping grooves 610 are in a clamping shape to the magnetic yoke 400, so that limiting is formed, and the armature 600 is effectively prevented from moving relative to the magnetic yoke 400. In this embodiment, the armature 600 is inclined, so that the armature 600 is placed in the limiting groove 4121 after passing through the yielding channel 4124, the armature 600 is limited by the groove wall of the limiting groove 4121 and the first baffle 4122 and the second baffle 4123, so as to prevent the armature 600 from being separated from the limiting groove 4121, and under the cooperation of the clamping groove 610, the armature 600 can rotate with the bottom surface of the groove of the limiting groove 4121 as a fulcrum, so that the first end of the armature 600 can be attracted with the end cover 210 of the oil cup 200, and the armature 600 is rotationally reset under the action of the elastic member 700.

In one possible embodiment, as shown in fig. 8, the end surface of the second baffle 4123 facing the first baffle 4122 is inclined from the bottom of the limit groove 4121 to the opening of the limit groove 4121 toward the second side wall 41212, and when the armature 600 is mounted, the inclination direction of the armature 600 is the same as the inclination direction of the end surface of the second baffle 4123 facing the first baffle 4122, so that the armature 600 is allowed to be put into the limit groove 4121. Illustratively, the distance H1 from the end of the first baffle 4122 facing the second baffle 4123 to the first sidewall 41211 is greater than or equal to the distance H2 from the end of the second baffle 4123 facing the first baffle 4122 to the second sidewall 41212, which is more convenient for the armature 600 to be placed in the limiting slot 4121.

In one possible embodiment, as shown in fig. 8, the center of the bottom of the limiting groove 4121 is provided with a first protrusion 4126, and a first side groove is formed between the first protrusion 4126 and the first side wall 41211, so that the armature 600 is more conveniently placed in the limiting groove 4121. Further, a second side groove is formed between the first protrusion 4126 and the second side wall 41212, respectively.

In the present embodiment, referring to fig. 9, a second end of the armature 600 is provided with a trip arm 620, and the trip arm 620 is used to push the traction rod 11 to trip the operating mechanism 10.

Specifically, the second end of the armature 600 is provided with a limiting pin 630, and the limiting pin 630 may abut against the yoke 400 to limit rotation of the armature 600 relative to the yoke 400. In this embodiment, the end cap 210 of the oil cup 200 limits the rotation angle of the first end of the armature 600 near the end cap 210 of the oil cup 200, and the limit leg 630 limits the rotation angle of the first end of the armature 600 far from the end cap 210 of the oil cup 200, so that the armature 600 rotates within a proper angle range, and the short-circuit protection and overload protection of the circuit breaker are more reliable.

In the present embodiment, referring to fig. 7 and 9, the second end of the armature 600 is provided with a first hanging hole 640, the yoke 400 is provided with a second hanging hole 4101, the first end of the elastic member 700 is hung in the first hanging hole 640, and the second end of the elastic member 700 is hung in the second hanging hole 4101, so as to facilitate assembly of the elastic member 700. Illustratively, the elastic member 700 may be a spring. Illustratively, in order to prevent the yoke 400 from interfering with the elastic member 700, a relief hole 4125 is formed on the long side portion 412 of the yoke 400, and the relief hole 4125 is used to form a relief for the elastic member 700, so as to facilitate the rotational reset of the armature 600.

In one possible embodiment, the second hanging hole 4101 is disposed on the long side portion 412 of the yoke 400, and the second hanging hole 4101 can extend to the short side portion 411 of the yoke 400, so as to effectively reduce stress between the long side portion 412 and the short side portion 411, improve bending quality of the yoke 400, and facilitate hanging the second end of the elastic member 700 in the second hanging hole 4101.

In one possible embodiment, the plate portion of the long side portion 412 between the yielding hole 4125 and the limiting groove 4121 is provided with a second protrusion 4127 protruding toward the oil cup 200, so that the limiting groove 4121 performs a better limiting function on the armature 600, and the armature 600 is effectively prevented from being separated from the limiting groove 4121 due to improper transportation and storage. Illustratively, the second projection 4127 is arcuate to facilitate stamping.

In one possible embodiment, the trip arm 620 and the limiting leg 630 are respectively located at two side edges of the armature 600, and the first hanging hole 640 is disposed between the trip arm 620 and the limiting leg 630, so as to effectively ensure that the armature 600 rotates stably, and prevent the armature 600 from being skewed. In the present embodiment, the armature 600 is formed by punching and bending, and the specific shape thereof may depend on the positional relationship with the traction rod 11.

Illustratively, the assembly process of the circuit breaker is:

first, the trip mechanism 20 is assembled.

When the yoke 400 and the oil cup 200 are in tight fit in the shaft hole interference fit or the shaft hole transition fit, the yoke 400, the limiting member 100 and the coil 300 may be assembled together, and then the oil cup 200 is sequentially inserted through the coil 300, the inner ring 130 of the limiting member 100 and the first end of the yoke 400, so as to assemble the armature 600 and the elastic member 700.

When the yoke 400 is in clearance fit with the oil cup 200 through the shaft hole, the limiting member 100 and the coil 300 may be assembled together, then the oil cup 200 is inserted through the coil 300 and pressed into the inner ring 130 of the limiting member 100, the oil cup 200 is inserted through the first end of the yoke 400, the yoke 400 and the oil cup 200 are welded together through soldering, and the armature 600 and the elastic member 700 are assembled.

Then, the movable contact 30 is connected to the terminal block 40.

Specifically, first, the second end of the wire 301 is connected to the moving contact 30, and then, the first end of the wire 301 is threaded through the transformer 500 and soldered to the first end of the coil 300; the second end of the coil 300 is inserted through the wire hole 42 of the wire bar 40 and soldered. Wherein, the second end of the soldering coil 300 and the wiring row 40 may be soldered after the wiring row 40 is fixed to the housing 50 by the screw 60 and the trip mechanism 20 is fixed in the housing 50.

Finally, the operating mechanism 10 and the movable contact 30 are assembled into the housing 50.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A trip mechanism, comprising:

The limiting piece (100) comprises a supporting plate (110), and an outer ring (120) and an inner ring (130) which are arranged on the supporting plate (110), wherein the outer ring (120) is sleeved outside the inner ring (130);

A coil (300) that is in contact with the support plate (110);

A yoke (400), a first end of the yoke (400) being disposed within the outer ring (120);

And the oil cup (200) sequentially penetrates through the coil (300), the inner ring (130) and the first end of the magnetic yoke (400).

2. The trip mechanism of claim 1, wherein the stopper (100) further comprises a fixing sleeve (140) disposed at an outer circumferential side of the outer ring (120), a first end of the coil (300) is disposed in the fixing sleeve (140) in a penetrating manner, and a second end of the coil (300) is electrically connected to the terminal block (40).

3. The trip mechanism according to claim 1, characterized in that a yielding groove (121) is formed in the peripheral side of the outer ring (120), and the first end of the yoke (400) is inserted into the yielding groove (121) and is disposed in the outer ring (120).

4. The trip mechanism according to claim 1, wherein the yoke (400) includes a body plate (410), the body plate (410) being L-shaped, including a short side portion (411) and a long side portion (412); wherein,

The short side part (411) is arranged in the outer ring (120), and one side surface of the short side part (411) facing the supporting plate (110) is attached to the end part of the inner ring (130);

The utility model discloses a bending plate, including long limit portion (412), long limit portion (412) are provided with bending plate (420) respectively, bending plate (420) include with long limit portion (412) are connected first kink (421) and with second kink (422) and third kink (423) that first kink (421) are connected, second kink (422) with the direction of buckling of third kink (423) with the direction of buckling of first kink (421) is opposite, just second kink (422) with third kink (423) all are on a parallel with long limit portion (412) set up and follow the direction of extension of minor face portion (411) is crisscross to be set up.

5. The trip mechanism of any one of claims 1-4, further comprising:

An armature (600) disposed at a second end of the yoke (400), the first end of the armature (600) being disposed above the end cap (210) of the oil cup (200);

An elastic member (700) is provided between the armature (600) and the yoke (400).

6. The trip mechanism of claim 5, wherein the second end of the yoke (400) is provided with a limiting groove (4121), the limiting groove (4121) comprises two opposite first side walls (41211) and second side walls (41212), the first side walls (41211) are provided with first baffle plates (4122) at openings of the limiting groove (4121) in a protruding manner, the second side walls (41212) are provided with second baffle plates (4123) at openings of the limiting groove (4121) in a protruding manner, and a yielding channel (4124) is formed between the first baffle plates (4122) and the second baffle plates (4123);

Clamping grooves (610) are formed in two opposite sides of the armature (600), the armature (600) penetrates through the limiting grooves (4121), and the first side wall (41211) and the second side wall (41212) of the limiting grooves (4121) are respectively arranged in the clamping grooves (610) on the corresponding sides.

7. The trip mechanism of claim 6 wherein an end surface of said second shutter (4123) facing said first shutter (4122) is disposed obliquely from a bottom of said limit groove (4121) to an opening of said limit groove (4121) facing said second side wall (41212).

8. The trip mechanism of claim 6 wherein a distance H1 from an end of the first plate (4122) toward the second plate (4123) to the first side wall (41211) is equal to or greater than a distance H2 from an end of the second plate (4123) toward the first plate (4122) to the second side wall (41212).

9. The trip mechanism of claim 5, wherein the second end of the armature (600) is provided with a limit foot (630), the limit foot (630) being abuttable with the yoke (400) to limit rotation of the armature (600) relative to the yoke (400).

10. A circuit breaker, comprising:

An operating mechanism (10);

The trip mechanism (20) of any one of claims 1-9, disposed in correspondence with said operating mechanism (10);

A moving contact (30) connected to the operating mechanism (10);

the wiring row (40) is electrically connected with the moving contact (30) through a coil (300) of the tripping mechanism (20), and the wiring row (40) is arranged on the outer periphery side of an outer ring (120) of a limiting piece (100) of the tripping mechanism (20).