CN214956717U - Electromagnetic release with low power consumption and strong stability - Google Patents

Abstract

The utility model discloses an electromagnetic release with low power consumption and strong stability, which relates to the technical field of electromagnetic tripping devices, and comprises a shell, a magnetic yoke, an armature, a permanent magnet, a clapboard and a limiting device; the permanent magnet is arranged between the two branches of the magnetic yoke, and is fixedly provided with a magnetic conductive connecting plate which is attached to the side surface of the branch of the magnetic yoke close to the armature rotating shaft and can slide along the side surface of the branch; the baffle is arranged between the armature and the end face of the permanent magnet; the limiting device is arranged in the shell and connected with the permanent magnet. When the polar surfaces of the two branches of the armature and the magnetic yoke are attached to each other, the permanent magnet can move relative to the magnetic yoke within a certain range, and the connecting plate moves along the side face of the branch of the magnetic yoke close to one side of the rotating shaft of the armature, so that the partition plate can be attached to the permanent magnet and the armature, the electromagnetic release is suitable for the use working condition of low current driving, and the electromagnetic release has the characteristics of strong use stability and low power consumption.

Description

Electromagnetic release with low power consumption and strong stability

Technical Field

The utility model relates to an electromagnetic tripping device technical field especially relates to an electromagnetic trip ware that low-power consumption, stability are strong.

Background

An electromagnetic release is one of releases and is mainly used for short-circuit protection of circuits.

In the prior art, chinese patent No. CN1763884B discloses an electromagnetic trip device and an electrical protection apparatus including the same, the electromagnetic trip device includes a U-shaped armature, a trip coil, a leaf, a spring of the leaf, and a return pin of the leaf, the leaf pivots relative to the armature and can move to the polar surfaces at the two ends of the armature to close a magnetic loop formed by the armature and the leaf, the trip coil is installed around a casing surrounding the loop; when the magnetic field generator is in a standing state, no current flows in the coil, and the blade is kept to lean against the armature by magnetic flux generated by the magnet; when a current is present in the coil, the leaf opens when this current has reached a certain magnitude predetermined by the balance between the torque of the spring and the magnetic torque produced by the magnetic flux generated by the magnet.

Among this electromagnetic tripping device, when the reset pin axle reset thrust that applys to the acanthus leaf was too big or after resetting many times, the acanthus leaf can take place to warp, also can lead to the clearance between acanthus leaf and the magnet to change, and then leads to electromagnetic tripping device's work unstability, seriously influences electromagnetic tripping device's normal use.

Therefore, there is a need to provide a new electromagnetic trip solution.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned prior art at least one kind defect, the utility model aims to provide an electromagnetic release to solve the problem of current electromagnetic release poor stability, and have the use operating mode who is applicable to low current drive, low-power consumption.

The utility model discloses a solve the technical scheme that its problem adopted and be:

an electromagnetic trip with low power consumption and high stability, comprising:

a housing;

a yoke disposed within the housing, the yoke including two branches each having a polar surface;

the armature is rotatably connected with one branch of the magnetic yoke and can be attached to the polar surfaces on the two branches to form a closed magnetic loop;

the permanent magnet is arranged between the two branches of the magnetic yoke, a magnetic conductive connecting plate is fixedly arranged on the permanent magnet, and the connecting plate is attached to the side surface of the branch of the magnetic yoke, which is close to one side of the armature rotating shaft, and can slide along the side surface of the branch;

the armature is provided with a non-magnetic baffle plate, and the baffle plate is positioned on one side of the end face of the armature, which faces the permanent magnet;

and the limiting device is arranged in the shell, is connected with the permanent magnet and is used for limiting the permanent magnet to move in a preset range along the direction parallel to the normal of the polar surface.

The utility model discloses an electromagnetic release, through set up the baffle on armature towards the terminal surface one side of permanent magnet, when armature and yoke two branched polar surface paste mutually, the baffle can paste with permanent magnet and armature mutually to make the air gap between permanent magnet and the armature keep the constant value, thereby can guarantee that the permanent magnet provides invariable magnetic force to armature, avoid the influence of assembly gap and armature deformation, make the reliable and stable operation of electromagnetic release; the connecting plate is connected with the branch of the magnetic yoke close to one side of the armature rotating shaft in a sliding manner, so that the force arm of the permanent magnet can be reduced, the locking moment of the permanent magnet on the armature can be reduced, the magnetic yoke can be excited by small current to offset partial magnetic flux of the permanent magnet, and then tripping action can be realized, and the magnetic yoke is suitable for use working conditions of small current driving and low power consumption; in addition, set up stop device, make the permanent magnet can be at a predetermined within range movablely along the normal direction that is on a parallel with the polar surface in the casing, thereby when armature and yoke two branched polar surface paste mutually, the permanent magnet can move for the yoke in certain extent, make the permanent magnet pass through the baffle and keep pasting mutually with armature, thereby avoid armature because deformation or other reasons can't keep in invariable predetermined air gap with the permanent magnet, further improve the stability that the electromagnetic trip used, in addition, install the permanent magnet in the casing by stop device, and make and keep the interval between permanent magnet and the yoke, thereby avoided being connected the trouble of permanent magnet and yoke through the welded mode among the prior art, and the processing production of being convenient for.

Further, the limiting device comprises a limiting protrusion arranged on the shell, a limiting groove is arranged on the permanent magnet, and the limiting protrusion can slide in the limiting groove along the direction parallel to the normal of the polar surface.

Further, the limiting protrusion is arranged on at least one side of the permanent magnet.

Furthermore, the limiting protrusions are arranged at two ends of the permanent magnet.

Furthermore, the limiting device further comprises a limiting sliding groove arranged on the shell, and the permanent magnet is arranged along the inner wall of the limiting sliding groove in a sliding mode.

Furthermore, the inner wall of the shell is provided with two opposite limiting plates, and the two limiting plates keep an interval to form the limiting sliding groove.

Further, the limiting device comprises a limiting groove arranged on the shell, a limiting convex part is arranged on the permanent magnet, and the limiting convex part can be arranged in the limiting groove along the normal direction parallel to the polar surface.

Further, the limiting device comprises a fixing sleeve, the permanent magnet is fixed with the fixing sleeve, and an accommodating sliding groove for the fixing sleeve to slide and limit is formed in the shell.

Furthermore, the electromagnetic release also comprises a reset elastic piece, and the reset elastic piece is connected with the armature and provides elastic force for the armature to be separated from the two polar surfaces;

the magnet yoke comprises a connecting part for connecting two branches of the magnet yoke, and the connecting part is provided with an excitation coil.

To sum up, the utility model provides an electromagnetic trip has following technological effect:

1) set up baffle and stop device, when the polarity surface of armature and yoke two branches pasted mutually, the permanent magnet can remove for the yoke in certain extent, and the connecting plate moves along the yoke and is close to the branch side of armature axis of rotation one side for the baffle can paste mutually with permanent magnet and armature, is applicable to low current drive's use operating mode, and the electromagnetism release has the stability of using strong, the characteristics of low-power consumption.

2) The limiting device adopts the technical scheme that the shell is provided with the limiting bulge, the permanent magnet is provided with the limiting groove, and the limiting bulge slides in the limiting groove, so that the permanent magnet can move in a certain range, and the structure is simple;

3) the shell is provided with a limiting sliding chute, and the permanent magnet is connected with the limiting sliding chute in a sliding manner, so that the permanent magnet can slide and provide guidance to the permanent magnet, and the permanent magnet can move stably;

4) the limiting sliding chute is formed by two limiting plates which are oppositely arranged, so that the structure is simple, and the process difficulty is reduced;

5) as an alternative mode, the limiting device can also adopt a mode that a limiting groove is arranged on the shell, a limiting convex part is arranged on the permanent magnet, the purpose that the permanent magnet can move in a certain range can be achieved by the limiting convex part sliding in the limiting groove, and the structure is simple.

6) As another embodiment, stop device includes fixed cover, fixes the fixed cover with the permanent magnet after, injects fixed cover through the holding spout on the casing again, makes fixed cover slide in the holding spout to reduced the degree of difficulty to the permanent magnet processing, be convenient for implement.

Drawings

Fig. 1 is an exploded view of an electromagnetic release according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of an electromagnetic release in a triggered and tripped state according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of an electromagnetic release in an embodiment of the present invention in a state of releasing without triggering;

fig. 4 is a schematic view of an internal structure of the box body in one embodiment of the present invention;

fig. 5 is a schematic structural diagram of the exciting coil, the yoke and the support of the electromagnetic release according to an embodiment of the present invention;

fig. 6 is a schematic structural view of the buffering elastic sheet and the connecting member according to an embodiment of the present invention.

Wherein the reference numerals have the following meanings:

1. a housing; 101. a limiting chute; 102. a box body; 1021. clamping; 1022. a through groove; 1023. buckling the salient points; 103. a cover plate; 1031. a buckling part; 2. a trip assembly; 201. a magnetic yoke; 2011. branching; 20111. a polar surface; 20112. clamping the bulges; 20113. a plug end; 2012. a connecting portion; 202. an armature; 203. a permanent magnet; 2031. a limiting groove; 204. a restoring elastic member; 205. a field coil; 3. a limiting device; 301. a limiting bulge; 4. a limiting plate; 5. a support; 501. connecting holes; 502. a second spring hook; 6. a connecting member; 601. rotating the support surface; 602. an inclined abutting surface; 7. a first spring hook; 8. a reset column; 801. a limiting table; 9. a buffering elastic sheet; 901. a fixed end; 902. a movable end; 903. an arching portion; 10. connecting the bosses; 1001. a reset hole; 11. a partition plate; 12. a connecting plate.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 1-6, the utility model discloses an electromagnetic trip ware that low-power consumption, stability are strong, including casing 1, set up tripping assembly 2 in casing 1, this tripping assembly 2 includes yoke 201, armature 202, permanent magnet 203, the elastic component 204 that resets of U-shaped, excitation coil 205, yoke 201 has two parallel arrangement's branch 2011 and connects and connecting portion 2012 between two branches 2011, and two branches 2011 of yoke 201 all have polarity surface 20111, and excitation coil 205 sets up on yoke 201.

The armature 202 is movably disposed with respect to the yoke 201, and can be attached to the two-pole surface 20111 to form a closed magnetic circuit.

Referring to fig. 2, the electromagnetic release is in a released state, and the return elastic member 204 is connected to the armature 202 to provide an elastic force for the armature 202 to disengage from the two polar surfaces 20111.

In this embodiment, the return elastic member 204 is a spring, and in other embodiments, it may also be a torsion spring, a rubber band, or other elastic material.

Referring to fig. 3, when the electromagnetic release is in an unfired release state, the permanent magnet 203 provides magnetic force to the armature 202 to keep the armature attached to the two polar surfaces 20111.

Referring to fig. 2 to 3, the permanent magnet 203 is fixed to the housing 1 and located between two branches 2011 of the yoke 201.

To reduce the current required for tripping, when the armature 202 is attached to the two polar surfaces 20111, an air gap is maintained between one end of the permanent magnet 203 and the armature 202, and the air gap is designed according to the practical application requirement of the electromagnetic trip.

In order to keep the air gap between the armature 202 and the end face of the permanent magnet 203 constant, a non-magnetically conductive spacer 11 is arranged between the armature 202 and the end face of the permanent magnet 203.

Further, the diaphragm 11 is fixed to at least one of the armature 202 and the permanent magnet 203.

Referring to fig. 1 to 3, further, as a preferred embodiment, in the present embodiment, the partition plate 11 is fixed to the armature 202 and is located on a side of the armature 202 facing the permanent magnet 203; therefore, when the armature 202 is attached to the polar surface 20111 of the two branches 2011 of the magnetic yoke 201, the partition plate 11 is attached to the permanent magnet 203 and the armature 202, so that a constant air gap is kept between the end faces of the armature 202 and the permanent magnet 203, and further, the magnetic force constant force exerted by the permanent magnet 203 ensures the stability of the armature 202 under the state of non-triggered tripping.

Referring to fig. 1, the electromagnetic release further includes a limiting device 3, and the limiting device 3 is connected to the permanent magnet 203 and is configured to limit the movement of the permanent magnet 203 within a preset range along a direction parallel to the normal of the polar surface 20111, where the preset range is set according to actual requirements.

Because the magnetic yoke 201 is fixed relative to the housing 1, when the armature 202 is attached to the polar surface 20111 of the two branches 2011 of the magnetic yoke 201, if a certain gap is left between the end surfaces of the partition plate 11 and the permanent magnet 203 due to the deformation of the armature 202, the permanent magnet 203 can slide relative to the magnetic yoke 201 along the normal direction parallel to the polar surface 20111 until the permanent magnet 203 is attached to the partition plate 11, so that a constant air gap is kept between the end surfaces of the armature 202 and the permanent magnet 203, and the reliability of the electromagnetic release is further improved.

Referring to fig. 1 to 4, as a preferred embodiment, in this embodiment, the limiting device 3 includes a limiting protrusion 301 disposed on the housing 1, a limiting groove 2031 is disposed on the permanent magnet 203, the limiting groove 2031 is in sliding fit with the limiting protrusion 301, and the limiting protrusion 301 limits the moving range of the limiting groove 2031, so as to limit the moving range of the permanent magnet 203.

Further, as a preferred embodiment, a limit protrusion 301 is provided at least one side of the permanent magnet 203.

Referring to fig. 2 to 4, in the present embodiment, as a preferred embodiment, the limiting protrusions 301 are disposed on two sides of the permanent magnet 203.

Preferably, the limiting protrusions 301 are symmetrically arranged at two sides of the permanent magnet 203; therefore, the limiting grooves 2031 are symmetrically arranged on two sides of the permanent magnet 203, so that the permanent magnet 203 can stably slide, and the phenomenon of blocking is reduced.

As a possible embodiment, the limit protrusions 301 may be provided at both ends of the permanent magnet 203, and the limit grooves 2031 may be provided at both ends, as well as being able to limit the purpose of the permanent magnet 203 to slide within a certain range.

Referring to fig. 4, further, as a preferred embodiment, in this embodiment, the limiting device 3 further includes a limiting sliding groove 101 disposed on the housing 1, and a side surface of the permanent magnet 203 is located in the limiting sliding groove 101, so that the stability of the permanent magnet 203 moving relative to the housing 1 can be improved.

Further, as a preferred embodiment, in the present embodiment, two opposite limiting plates 4 are disposed on the inner wall of the casing 1, the two limiting plates 4 maintain a distance to form a limiting chute 101, and the permanent magnet 203 is disposed between the two limiting plates 4 and can slide relative to the limiting plates 4 on both sides.

Referring to fig. 2 to 3, in the preferred embodiment, in the present embodiment, the armature 202 is rotatably connected to one branch 2011 of the yoke 201, and the armature 202 is movably disposed relative to the yoke 201 along a normal direction parallel to the polar surface 20111, so as to achieve an effect of increasing the tightness of the armature 202 against the polar surface 20111 of the branch 2011, so as to reduce the possibility of magnetic leakage.

More preferably, referring to fig. 1 to 3, in this embodiment, a branch 2011 of a yoke 201 is fixedly provided with a non-magnetic-conductive support 5, an armature 202 is rotatably connected to the support 5, and a rotation shaft of the armature 202 rotating around the support 5 is slidably connected to the support 5, the rotation shaft slides relative to the support 5 along a normal direction parallel to a polar surface 20111, so that the armature 202 can rotate relative to the yoke 201 and can also be movably arranged relative to the yoke 201 along a normal direction parallel to the polar surface 20111, when tripping is triggered, the armature 202 swings relative to the support 5 under the pulling of a return elastic element 204, and tripping is rapid; in a normal state of tripping, the armature 202 can slide relative to the support 5, so that the armature 202 is better attached to the surface, and the possibility of magnetic leakage is reduced.

Referring to fig. 1 to 3, as a preferred embodiment, in this embodiment, a magnetic conductive connecting plate 12 is fixed to the permanent magnet 203, the connecting plate 12 is disposed by a branch 2011 where the yoke 201 is rotatably connected to the armature 202, that is, the connecting plate 12 and the yoke 201 are close to a side where the armature 202 rotates, and the connecting plate 12 is attached to a surface of the branch 2011 and can slide relative to the surface of the branch 2011.

Therefore, on one hand, the permanent magnet 203 can reduce the occupation of the longitudinal space between the two branches 2011 of the magnetic yoke 201, so that the structural design of the electromagnetic release is compact, and on the other hand, the connecting plate 12 can be adjusted in a self-adaptive manner along with the permanent magnet 203, so that the armature 202 and the permanent magnet 203 are kept at an undetermined preset air gap value; in addition, when the armature 202 is attached to the polar surface 20111, the permanent magnet 203 forms a permanent magnet loop with the magnetic yoke 201 through the connecting plate 12, so that the moment arm for generating a magnetic action on the armature 202 is short, and the current required by the excitation coil 205 when the electromagnetic magnetic flux generated by the excitation coil 205 in the magnetic yoke 201 weakens the magnetic flux generated by the permanent magnet 203 and further destroys the force balance between the reset elastic piece 204 and the attraction force of the permanent magnet 203 is small.

Further, as a preferred embodiment, the surfaces of the connecting plate 12 and the branch 2011 of the yoke 201, on which the connecting plate 12 slides, are set to be smooth, so as to reduce friction and avoid the effect of abrasion on the yoke 201.

Further, as a preferred embodiment, the excitation coil 205 is disposed on the connecting portion 2012, so that the longitudinal size of the yoke 201 can be reduced, the space can be fully utilized, and a large number of windings are provided, thereby achieving a compact structure.

Further, referring to fig. 2, 3 and 6, in a possible embodiment, the armature 202 is provided with a rotation support surface 601 which is attached to the surface of the support 5 and can slide along the surface of the support 5, and the armature 202 can rotate relative to the support 5 around the rotation support surface 601.

As a more preferable embodiment, in the present embodiment, the armature 202 is fixed with a non-magnetic connecting member 6, and the rotation supporting surface 601 is disposed on the connecting member 6; the connecting piece 6 is connected with the support 5, so that the processing difficulty is reduced, and the abrasion of the armature 202 is reduced, so that the service life is influenced.

Further, in order to avoid that the armature 202 rotates relative to the support 5 by an excessively large opening angle when tripping is triggered, an angle limiting structure (not labeled in the figure) is further arranged between the support 5 and the armature 202, and the angle limiting structure can be attached to the surface of at least one of the support 5 and the armature 202 to limit the rotation angle of the armature 202 relative to the magnetic yoke 201.

As a preferred embodiment, in the present embodiment, the angle limiting structure is an inclined abutment surface 602 provided on the side of the rotation support surface 601, and the inclined abutment surface 602 can abut against the surface of the support 5 to limit the rotation angle of the armature 202 relative to the yoke 201.

Specifically, in the present embodiment, the inclined abutment surface 602 is provided on the link 6 on the side of the rotation support surface 601.

Referring to fig. 2, 3 and 6, in the present embodiment, the connecting element 6 is provided with the inclined abutting surfaces 602 on both sides of the rotation supporting surface 601, so that the connecting element 6 is in a V-shaped structure, and the rotation supporting surface 601 is a tip of the V-shaped structure, which is used as a rotation fulcrum of the connecting element 6 relative to the support 5, that is, a fulcrum of the armature 202 relative to the support 5, and a rotation axis of the armature 202 and the connecting element 6.

Further, in order to avoid abrasion of the rotation supporting surface 601 caused by repeated rotation of the connecting member 6, the rotation supporting surface 601 is configured as a cambered surface; and a wear-resistant coating can be formed on the rotating supporting surface 601, so that the service life of the repeated action of the armature 202 is prolonged, and the service life of the electromagnetic release is further prolonged.

One possible implementation is: a limit block is arranged on the support 5, and the armature 202 is in butt joint with the limit block after tripping and swinging relative to the support 5, so that the rotation opening angle of the armature 202 is limited by the limit block.

In other possible embodiments, a limit post may be provided on the connection element 6 or the armature 202, and after the armature 202 is tripped and swings relative to the support 5, the limit post abuts against the surface of the support 5, so as to limit the opening angle of the armature 202 by rotating.

Further, as a preferred embodiment, the holder 5 is detachably fixedly coupled with the yoke 201.

Furthermore, as a preferred embodiment, referring to fig. 1, fig. 2, fig. 3 and fig. 5, in this embodiment, a clamping protrusion 20112 is disposed on a side surface of a branch 2011 of the magnetic yoke 201, a connecting hole 501 tightly matched with the clamping protrusion 20112 is disposed on the support 5, and the clamping protrusion 20112 is in clamping fit with the connecting hole 501, so that the detachable connection between the support 5 and the magnetic yoke 201 is realized, and therefore, the support 5 and the magnetic yoke 201 can be conveniently mounted and detached, and the production, the processing and the assembly are convenient.

Furthermore, as a preferred embodiment, in the present embodiment, the connection hole 501 is a through hole, and the connection hole 501 is a through hole, so that the connection condition between the support 5 and the magnetic yoke 201 can be observed conveniently during the assembly process, and the assembly is convenient;

in other possible embodiments, the connection hole 501 may also be configured as a blind hole.

Further, as a preferred embodiment, the excitation coil 205 is disposed on the connecting portion 2012, so that the longitudinal size of the yoke 201 can be reduced, the space can be fully utilized, and a large number of windings are provided, thereby achieving a compact structure.

Further, as a possible embodiment, the armature 202 is further provided with a first spring hook 7 to which the return elastic member 204 is connected.

As a further preferred embodiment, the first spring hook 7 is integrally formed with the connecting piece 6.

Furthermore, the first spring hook 7 is formed by bending a part of the plate material of the connecting piece 6, so that the processing is convenient, and the material is saved.

Further, the first spring hook 7 abuts against the end of the armature 202, so that the armature 202 can be positioned in an auxiliary manner, and the armature 202 and the connecting piece 6 can be fixed conveniently.

Further, as a more preferable embodiment, the inner side surface of the connecting piece 6 is attached to the side surface of the armature 202 to assist in fixing the armature 202, so that the influence of the transmission of the armature 202 relative to the connecting piece 6 on the machining precision when the armature 202 and the connecting piece 6 are fixed is avoided, and in addition, the connection strength between the armature 202 and the connecting piece 6 is favorably enhanced.

Further, as a possible implementation manner, a second spring hook 502 is arranged on the support 5, and two ends of the return elastic member 204 are respectively connected with the first spring hook 7 and the second spring hook 502; therefore, the elastic restoring element 204 can be fixed with the magnetic yoke 201 and then assembled in the housing 1, thereby facilitating debugging.

Further, as a possible embodiment, a reset post 8 is connected to the housing 1, and the reset post 8 is used for driving the armature 202 to move so as to make the armature 202 abut against the two polar surfaces 20111 of the yoke 201 to reset.

Further, as a more preferable embodiment, in the present embodiment, the reset rod 8 abuts against the side of the armature 202 away from the polar surface 20111.

In other possible embodiments, an abutting plate (not shown) may extend from a side surface of the armature 202, and the reset column 8 abuts against the abutting plate, so as to drive the armature 202 to move by applying pressure to the abutting plate, and further, the armature 202 abuts against the two polar surfaces 20111 of the yoke 201 to reset.

Furthermore, as a preferred embodiment, in the present embodiment, the armature 202 is provided with a buffering elastic sheet 9, and the buffering elastic sheet 9 is located on a side of the armature 202 away from the polar surface 20111; the buffering elastic sheet 9 is used for buffering the reset force applied by the reset column 8 to the armature 202, so that the deformation of the armature 202 is reduced.

Further, as a preferred embodiment, referring to fig. 1, fig. 2, fig. 3 and fig. 6, in the present embodiment, the buffering elastic sheet 9 includes a fixed end 901 and a movable end 902, the fixed end 901 and the movable end 902 form an arch portion 903 facing away from the surface of the armature 202, the return post 8 abuts against one side of the arch portion 903, the fixed end 901 is fixed to the armature 202, and the movable end 902 can slide along the surface of the armature 202; with this arrangement, when the return post 8 applies a force to the cushion spring 9, the arching portion 903 can be deformed in a direction approaching the armature 202, and the movable portion can slide along the surface of the armature 202, thereby achieving a good cushion effect.

Further, the buffering elastic sheet 9 is a non-magnetic sheet.

Furthermore, the buffering elastic sheet 9 and the connecting piece 6 are integrally formed, so that the material is saved, and the economy is better.

Further, as a preferred embodiment, referring to fig. 1 to 4, the housing 1 includes a closed box 102 having a lateral opening, and a cover plate 103 detachably connected to the box 102 and used for closing the opening; therefore, after the magnet yoke 201, the magnet exciting coil 205, the support 5, the armature 202 and the reset elastic part 204 are installed to form the tripping assembly 2, the tripping assembly can be integrally installed in the box body 102 from the opening on the side part of the box body 102, performance debugging after products are assembled is facilitated, whether parts are connected in place or not is visually checked, and quality inspection is facilitated.

Referring to fig. 4, as a preferred embodiment, in this embodiment, a clamping portion 1021 for clamping the magnetic yoke 201 is disposed on a surface of the box body 102 opposite to the cover plate 103; the clamping position 1021 is used for assisting in fixing the magnetic yoke 201, so that the assembly of a product is facilitated.

Further, referring to fig. 4 and 5, a plug-in terminal 2011 is disposed on the branch 2011 of the yoke 201, and the plug-in terminal 20113 is matched with the detent 1021; the positioning and installation of the magnetic yoke 201 are convenient to realize; and the fixing of the magnet yoke 201 is assisted, so that the magnet yoke 201 is prevented from shaking in the use process.

Further, referring to fig. 4, a through groove 1022 is formed in a side surface of the box body 102 perpendicular to the cover plate 103, and a lead or a terminal of the excitation coil 205 is inserted into the box body 102 through the through groove 1022, so that a circuit connection is realized, and the structure is simple.

Further, the case 102 and the cover 103 are connected by a snap structure.

More specifically, referring to fig. 1 and 4, a snap bump 1023 is disposed on a side surface of the box 102, a snap portion 1031 matched with the snap bump 1023 is disposed on the cover plate 103, and the detachable connection between the box 102 and the cover plate 103 is realized by matching the snap portion 1031 with the snap bump 1023.

Further, referring to fig. 1 and 4, as a preferred embodiment, in this embodiment, the housing 1 is further provided with a connecting boss 10, the connecting boss 10 is provided with a reset hole 1001 through which the reset column 8 penetrates, and the connecting boss 10 can extend the contact length between the reset column 8 and the housing 1, so as to prevent the reset column 8 from shaking.

Further, referring to fig. 1 to 4, a limiting table 801 is disposed at one end of the reset column 8 abutting against the armature 202, and the limiting table 801 can abut against the surface of the connecting boss 10 to limit the reset column 8 from separating from the housing 1.

Further, as a preferred embodiment, when the inclined abutment surface 602 abuts against the surface of the support 5, the limit table 801 can abut against the surface of the connection boss 10; the connection boss 10 thus assists in limiting the angular position of the inclined abutment surface 602 of the connection member 6, which makes it possible to limit the angle of rotation of the armature 202 even better.

Furthermore, a connecting notch (not marked in the figure) is formed in the shell 1, and the connecting boss 10 is matched with the connecting notch in a clamping manner, so that the connecting boss 10 is conveniently fixed with the shell 1.

Example 2

The present embodiment discloses another electromagnetic release, and based on the embodiments, the present embodiment is different from embodiment 1 in that:

in this embodiment, stop device 3 is including setting up the spacing groove (not shown in the figure) on casing 1, be provided with spacing convex part (not shown in the figure) on the permanent magnet 203 side, spacing convex part sets up along the normal direction of perpendicular to polarity surface 20111, the spacing groove is seted up along the normal direction that is on a parallel with polarity surface 20111, spacing convex part and spacing groove sliding fit, the inner wall at spacing groove both ends can with spacing convex part butt, thereby restrict spacing bellied sliding range, reach equally and make permanent magnet 203 along the normal of polarity surface 20111 at the within range activity of predetermineeing, and then make the job stabilization of electromagnetic trip ware, reliable.

Example 3

The present embodiment discloses another electromagnetic release, and based on the embodiments, the present embodiment is different from embodiment 1 in that:

the limiting device 3 comprises a fixed sleeve, the permanent magnet 203 is fixed with the fixed sleeve, and the shell 1 is provided with an accommodating chute for the fixed sleeve to slide and limit the fixed sleeve; after the permanent magnet 203 is fixed with the fixed sleeve, the fixed sleeve is arranged in the accommodating chute; thus, the fixed sleeve is arranged, so that the trouble of processing the permanent magnet 203 can be reduced, and the processing difficulty is reduced.

Further, as a preferred embodiment, in this embodiment, the permanent magnet 203 is embedded in the fixed sleeve, for example, the permanent magnet 203 is formed in the fixed sleeve by means of encapsulation, when this is adopted, the partition can be reduced or even omitted appropriately, the encapsulation of the fixed sleeve serves as the partition, and of course, the material of the fixed sleeve needs to be rigid and not easy to deform under pressure;

or the fixing sleeve is sleeved on the periphery of the permanent magnet 203 and the end part of the permanent magnet 203 penetrates out of the fixing sleeve.

To sum up, the utility model provides an electromagnetic trip has the advantage of stable high, the good reliability of work.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (9)

1. An electromagnetic trip with low power consumption and strong stability, comprising:

a housing (1);

a magnetic yoke (201) arranged inside the housing (1), the magnetic yoke (201) comprising two branches (2011) each having a polar surface (20111);

the armature (202) is rotatably connected with one branch (2011) of the magnetic yokes (201) and can be attached to polar surfaces (20111) on the two branches (2011) to form a closed magnetic circuit;

the permanent magnet (203) is arranged between the two branches (2011) of the magnetic yoke (201), a magnetic conductive connecting plate (12) is fixedly arranged on the permanent magnet (203), and the connecting plate (12) is attached to the side surface of the branch (2011) of the magnetic yoke (201) close to the rotating shaft side of the armature (202) and can slide along the side surface of the branch (2011);

a non-magnetic partition plate (11) is arranged on the armature (202), and the partition plate (11) is positioned on one side of the end face, facing the permanent magnet (203), of the armature (202);

and the limiting device (3) is arranged in the shell (1), is connected with the permanent magnet (203) and is used for limiting the movement of the permanent magnet (203) in a preset range along the direction parallel to the normal of the polar surface (20111).

2. Electromagnetic trip according to claim 1, characterized in that the stop means (3) comprise a stop protrusion (301) arranged on the housing (1), a stop recess (2031) being arranged on the permanent magnet (203), the stop protrusion (301) being slidable in the stop recess (2031) in a direction parallel to the normal of the polar surface (20111).

3. An electromagnetic release according to claim 2, wherein the stop protrusion (301) is provided on at least one side of the permanent magnet (203).

4. An electromagnetic release according to claim 2, wherein the stop protrusions (301) are provided at both ends of the permanent magnet (203).

5. The electromagnetic trip according to any of the claims 2 to 4, characterized in that the stop means (3) further comprises a stop runner (101) arranged on the housing (1), the permanent magnet (203) being slidably arranged along an inner wall of the stop runner (101).

6. Electromagnetic release according to claim 5, characterized in that two oppositely arranged limit plates (4) are arranged on the inner wall of the housing (1), the two limit plates (4) being spaced apart to form the limit chute (101).

7. Electromagnetic release according to claim 1, characterized in that the stop means (3) comprise a stop groove provided on the housing (1), the permanent magnet (203) being provided with a stop lug which can be in the stop groove in a direction parallel to the normal of the polar surface (20111).

8. The electromagnetic release according to claim 1, characterized in that said limiting device (3) comprises a fixed sleeve, said permanent magnet (203) is fixed to said fixed sleeve, and said housing (1) is provided with a receiving chute for said fixed sleeve to slide and limit.

9. The electromagnetic release according to claim 8, characterized in that the electromagnetic release further comprises a return spring (204), wherein the return spring (204) is connected to the armature (202) and provides a spring force for the armature (202) to disengage from the two polar surfaces (20111);

yoke (201) is including being used for connecting yoke (201) two branch connecting portion (2012) of (2011), connecting portion (2012) are provided with excitation coil (205).

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