CN219370952U - Circuit breaker - Google Patents

Abstract

The application relates to the technical field of electrical devices, in particular to a circuit breaker, and the circuit breaker provided by the embodiment of the application comprises a fixing part, a main shaft and a hoop; the anchor ear is connected on the fixed part, and the inner circle cover of anchor ear is located main shaft periphery, and is equipped with the recess on the inner circle of anchor ear, and when the action mechanism action of circuit breaker, the main shaft rotates relative anchor ear. The main shaft is connected with the fixing part through the anchor ear, so that after the main shaft or the anchor ear is worn, the main shaft or the anchor ear can be adjusted in a mode of replacing the anchor ear, and the action mechanism of the circuit breaker can be conveniently restored to the action accuracy. Through set up the recess on the inner circle of staple bolt, not only can reduce the friction between staple bolt and the main shaft through reducing the area of contact of staple bolt and main shaft, can also pack more lubricating grease in the recess to carry out longer infiltration between staple bolt and the main shaft, reduce the frictional force when rotating relatively between staple bolt and the main shaft, make the circuit breaker keep higher reliability of divide-shut brake for a long time.

Description

Circuit breaker

Technical Field

The embodiment of the application relates to the technical field of electrical devices, in particular to a circuit breaker.

Background

The circuit breaker is an important part in the power distribution electric appliance, is mainly used for various low-voltage power systems, and is used for switching on and off current in a power grid circuit and protecting circuits and power supply equipment from damage caused by faults such as overload, undervoltage, short circuit, single-phase grounding and the like.

The action mechanism in the circuit breaker can ensure reliable opening and closing of the circuit breaker, the action mechanism of the circuit breaker comprises a moving contact, the moving contact is connected to a main shaft, when the action mechanism acts, the moving contact and the main shaft synchronously rotate, so that the main shaft and a fixing part for installing the main shaft in the circuit breaker can relatively rotate, friction can be generated in the rotating process, grease can be coated on the rotating position of the main shaft generally to reduce friction, but as the using time and the action times are increased, the grease can be continuously consumed, the friction between the main shaft and the fixing part is increased, the opening and closing time of the circuit breaker can be influenced, even when serious abrasion occurs between the main shaft and the fixing part, the position accuracy of the moving contact can be influenced, and the opening and closing reliability of the circuit breaker is further reduced.

Disclosure of Invention

In view of the above-mentioned problem, the embodiment of the present application provides a circuit breaker, which is beneficial to increasing the time for which the part of the main shaft, which contacts the fixing part, is soaked by grease, so that the circuit breaker can maintain high reliability of opening and closing for a long time.

The circuit breaker provided by the embodiment of the application comprises a fixing part, a main shaft and a hoop; the anchor ear is connected on the fixed part, and the inner circle cover of anchor ear is located main shaft periphery, and is equipped with the recess on the inner circle of anchor ear, and when the action mechanism action of circuit breaker, the main shaft rotates relative anchor ear.

The main shaft is connected with the fixing part through the anchor ear, so that after the main shaft or the anchor ear is worn, the main shaft or the anchor ear can be adjusted in a mode of replacing the anchor ear, and the action mechanism of the circuit breaker can be conveniently restored to the action accuracy. Through set up the recess on the inner circle of staple bolt, not only can reduce the friction between staple bolt and the main shaft through reducing the area of contact of staple bolt and main shaft, can also pack more lubricating grease in the recess to carry out longer infiltration between staple bolt and the main shaft, reduce the frictional force when rotating relatively between staple bolt and the main shaft, make the circuit breaker keep higher reliability of divide-shut brake for a long time.

In an alternative, the edges of the groove are located within the inner ring of the anchor ear and do not coincide with the inner ring edges of the anchor ear.

By adopting the scheme, after the lubricating grease is filled into the groove, the lubricating grease is not easy to flow out from the edge of the anchor ear, so that the lubricating grease is prevented from being unable to play a lubricating role between the anchor ear and the main shaft.

In an alternative, the recess is provided with one or more.

Through adopting above-mentioned scheme, a recess saves processing procedure more, and the cost is lower, and more lubricating grease can be stored to a plurality of recesses, and a plurality of recesses can lubricate between main shaft and staple bolt through constantly releasing lubricating grease in different positions department for the lubricating grease coverage area is bigger, further reduces the frictional force between staple bolt and the main shaft.

In an alternative mode, when a plurality of grooves are arranged, the projections of at least two grooves on the axis of the hoop are arranged in a staggered mode.

Because the main shaft is for the staple bolt when the main shaft rotates, the main shaft is along the inner circle circumference motion of staple bolt, so when there is the lubricating grease to flow out in the recess, the lubricating grease can extend along the inner circle circumference of staple bolt along with the rotation of main shaft generally and smear, and only less lubricating grease can extend along the axial of staple bolt and smear between main shaft and staple bolt. This application above-mentioned scheme is through the projection dislocation set of two at least recesses on the axis of staple bolt for all being covered by the lubricating grease at the main shaft circumference surface that the recess of difference corresponds, thereby increase lubricating grease is to the lubrication area of main shaft and staple bolt contact surface in the long-term in-process of using of circuit breaker, further reduces the frictional force between main shaft and the staple bolt.

In an alternative, at least one recess is located in the upper half-peripheral wall of the inner ring of the anchor ear, based on the mounting orientation of the circuit breaker when in use.

By adopting the scheme, after the lubricating grease is filled in the groove, the lubricating grease can flow to the surface of the main shaft outside the groove, which is contacted with the anchor ear, under the action of gravity, so that the adhesion area of the lubricating grease is increased.

In an alternative mode, the fixing part comprises a mounting plate, a notch is formed in one side, close to the main shaft, of the mounting plate, and the anchor ear is at least partially located in the notch.

Through adopting above-mentioned scheme, the breach on the mounting panel is used for holding the staple bolt, not only makes the structure of circuit breaker compacter, and the volume reduces, and the breach can also restrict the position of staple bolt for the staple bolt is fixed with the relative position of mounting panel, and the staple bolt is difficult to take place the displacement by a wide margin at the in-process of main shaft motion, is favorable to improving the accuracy and the reliability of the divide-shut brake of circuit breaker.

In an alternative, the shape of the notch is adapted to the shape of the outer ring of the portion of the anchor ear located within the notch.

The space allowance between the notch and the outer ring of the anchor ear is smaller, the movable space of the anchor ear can be further limited, the movable amplitude of the anchor ear is reduced, and the accuracy and reliability of opening and closing of the circuit breaker are improved.

In an alternative mode, the anchor ear comprises a semi-annular first anchor locking part and a semi-annular second anchor locking part, and the end parts of the two semi-rings of the first anchor locking part and the end parts of the two semi-rings of the second anchor locking part are respectively butted to form a whole circle anchor ear; one end part of the butt joint of the first locking part and the second locking part is positioned in the notch, so that the side wall of the notch limits the first locking part and the second locking part in a butt joint state.

The whole circle hoop formed by the first locking part and the second locking part can be used for separating the first locking part from the second locking part during installation and respectively sleeved on the main shaft, and finally, the end parts of the two semi-rings of the first locking part and the second locking part are respectively abutted to form the whole circle hoop, so that the structure is convenient for assembly between the hoop and the main shaft. In addition, because one of the end that first lock portion and second lock portion dock is located the breach, so when first lock portion and second lock portion are embraced towards opposite direction motion, the inner wall of breach can with first lock portion and second lock portion butt respectively to restrict the two and move along opposite direction, thereby with first lock portion and second lock portion restriction in the butt joint state.

In an alternative mode, a first limiting part is arranged on the first locking part, a second limiting part is arranged on the second locking part, the first limiting part is arranged on one side of the mounting plate, and the second limiting part is arranged on the other side of the mounting plate; the circuit breaker further comprises a connecting piece, wherein the connecting piece is used for fixing the first limiting part and the second limiting part on the mounting plate.

Through adopting above-mentioned scheme, first spacing portion and second spacing portion are located the both sides of mounting panel respectively, after the connecting piece is fixed first spacing portion and second spacing portion on the mounting panel, the staple bolt is fixed on the mounting panel, and first spacing portion and second spacing portion then can restrict the removal of staple bolt respectively from the both sides of mounting panel for the staple bolt is fixed more firmly on the mounting panel, is difficult to produce the displacement of great degree along the thickness direction of mounting panel, and after main shaft and staple bolt assembly, the main shaft and the position of the annex of connection on the main shaft also will be more stable and accurate.

In an alternative, the spindle is at least partially located within the indentation.

When the main shaft is arranged on the inner ring of the hoop, the main shaft is at least partially positioned in the notch, so that the structure of the circuit breaker is more compact, the size is reduced, the side wall of the notch can be quickly supported without continuing to move after the hoop is slightly displaced in the action process of the main shaft, the position stability of the hoop is higher, and the accuracy and the reliability of opening and closing of the circuit breaker are improved.

According to the embodiment of the application, the main shaft and the fixing part are connected through the anchor ear, so that after the main shaft or the anchor ear is worn, the main shaft or the anchor ear can be adjusted through the mode of replacing the anchor ear, and the action mechanism of the circuit breaker can be conveniently restored to action accuracy. The groove is formed in the inner ring of the hoop, friction between the hoop and the main shaft can be reduced through reducing the contact area of the hoop and the main shaft, more lubricating grease can be filled in the groove, so that the hoop and the main shaft are soaked for a longer time, friction force generated when the hoop and the main shaft rotate relatively is reduced, and the reliability of switching-on and switching-off of the circuit breaker can be kept high for a long time.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic partial structure of a circuit breaker provided in the present application.

Fig. 2 is a schematic structural view of the anchor ear.

Fig. 3 is a schematic structural view of the mounting plate, the anchor ear and the spindle in an assembled state.

Fig. 4 is a schematic structural view of the mounting plate, the anchor ear and the spindle in an exploded state.

Reference numerals illustrate: 1. a fixing part; 2. a main shaft; 3. a hoop; 31. a first locking part; 32. the second locking part; 33. a first limit part; 34. a second limit part; 4. a groove; 5. a mounting plate; 51. a notch; 6. and a connecting piece.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

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 application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the drawings are intended to cover, but not exclude, other matters. The word "a" or "an" does not exclude the presence of a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The directional terms appearing in the following description are all directions shown in the drawings and are not limiting to the specific structure of the circuit breaker of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms first, second and the like in the description and in the claims of the present application or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to expressly or implicitly include one or more such features.

In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., the terms "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., the physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Fig. 1 is a schematic partial structure of a circuit breaker provided in the present application, fig. 2 is a schematic structure of a hoop, and as shown in fig. 1 and fig. 2, an embodiment of the present application provides a circuit breaker, where the circuit breaker includes a fixing portion 1, a main shaft 2, and a hoop 3; the anchor ear 3 is connected on fixed part 1, and the inner race cover of anchor ear 3 is located main shaft 2 periphery, and is equipped with recess 4 on the inner circle of anchor ear 3, and when the action mechanism action of circuit breaker, main shaft 2 rotates relative anchor ear 3.

The fixing portion 1 is a generic term for a component that does not move during use of the circuit breaker, among components constituting the circuit breaker, and may be a housing of the circuit breaker, or any fixing component in the housing, which is not limited in the embodiment of the present application.

The actuating mechanism is any one or a series of parts which form the parts of the circuit breaker and can generate motion during the use process of the circuit breaker, and for example, the actuating mechanism can be a moving contact or a related accessory for driving the moving contact to move.

The hoop 3 is generally annular, and may be formed by a part or several parts, so that for facilitating locking, an inner ring of the hoop 3 is generally annular and is in close contact with a surface of a component to be locked, and an outer ring of the hoop 3 is a ring surface opposite to the inner ring of the hoop 3, which may or may not be annular, and the embodiment of the present application is not limited thereto. In the embodiment of the application, the part needing to be locked by the anchor ear 3 is the main shaft 2, and the inner ring of the anchor ear 3 is a ring of the anchor ear 3 contacted with the main shaft 2.

The main shaft 2 is connected with the fixing part 1 through the anchor ear 3, so that the main shaft 2 or the anchor ear 3 is worn, and when the action of an action mechanism connected to the main shaft 2 is inaccurate, the position of the main shaft 2 can be adjusted by changing the anchor ear 3, thereby being convenient for the action mechanism of the circuit breaker to restore the action accuracy.

In addition, through set up recess 4 on the inner circle of staple bolt 3, not only can reduce the friction between staple bolt 3 and the main shaft 2 through reducing the area of contact of staple bolt 3 and main shaft 2, can also pack more lubricating grease in recess 4 to carry out the infiltration of longer time between staple bolt 3 and main shaft 2, reduce the frictional force when rotating relatively between staple bolt 3 and the main shaft 2 for the circuit breaker can keep higher divide-shut brake's reliability for a long time.

In the above embodiment, the shape and position of the groove 4 are not limited, and may be set by those skilled in the art according to actual requirements.

In an alternative, as shown in fig. 2, the edges of the groove 4 are located within the inner periphery of the anchor ear 3 and do not coincide with the inner periphery of the anchor ear 3.

When the groove 4 is used for containing lubricating grease, once the edge of the groove 4 exceeds the inner ring of the hoop 3, and a part of the groove extends to the side of the hoop 3, namely, the part between the inner ring and the outer ring of the hoop 3, then the space in the groove 4 is communicated with the space outside the inner ring of the hoop 3, thus after the lubricating grease is filled in the hoop 3, the lubricating grease is likely to flow to the position outside the inner ring of the hoop 3 under the influence of temperature or gravity and the like, and the lubricating grease cannot act between the inner ring of the hoop 3 and the main shaft 2, so that the lubricating grease is wasted, and the lubricating time between the hoop 3 and the main shaft 2 is shortened.

By arranging the groove 4 in the inner ring range of the hoop 3 and not overlapping with the inner ring edge of the hoop 3, after grease is filled into the groove 4, the grease is not easy to flow out from the edge of the hoop 3, but only exists in the space between the hoop 3 and the main shaft 2, which can be the position corresponding to the groove 4 or beyond the position corresponding to the groove 4, but it can be understood that the grease filled into the groove 4 can play a lubricating role between the hoop 3 and the main shaft 2 to the greatest extent after the groove 4 is arranged, the grease waste is avoided, the time that the contact surface of the hoop 3 and the main shaft 2 is soaked by the grease is prolonged, the friction force during relative rotation between the hoop 3 and the main shaft 2 is reduced, and the reliability of switching on and off can be kept higher for a long time.

In an alternative, as shown in fig. 2, the recess 4 is provided with one or more.

When there is only one groove 4, the number is small, so that the working procedure and time for machining the groove 4 are greatly saved, and the machining cost is saved.

When recess 4 is equipped with a plurality of, a plurality of recesses 4 can store more lubricating grease, and a plurality of recesses 4 can lubricate between main shaft 2 and staple bolt 3 through constantly releasing lubricating grease in different positions department for the lubricating grease coverage area is bigger, further reduces the frictional force between staple bolt 3 and the main shaft 2.

One skilled in the art may provide one or more grooves 4 in the inner ring of the hoop 3 according to actual requirements, which is not limited in this application.

In an alternative, as shown in fig. 2, when a plurality of grooves 4 are provided, at least two grooves 4 are arranged offset in projection on the axis OO' of the anchor ear 3.

Assuming that the two ends of the axis of the anchor ear 3 are a first end and a second end respectively, the projection of each groove 4 on the axis OO ' of the anchor ear 3 is a line, one end of the line is the orthographic projection of a point of the groove 4 closest to the first end on the axis OO ' of the anchor ear 3, and the other end of the line is the orthographic projection of a point of the groove 4 closest to the second end on the axis OO ' of the anchor ear 3.

The projection offset arrangement means that the projections do not completely overlap, i.e. the projections may be completely offset or partially overlap.

Because the main shaft 2 rotates, the main shaft 2 moves circumferentially along the inner ring surface of the anchor ear 3 relative to the anchor ear 3, when the lubricating grease flows out of the groove 4, the lubricating grease generally extends between the anchor ear 3 and the main shaft 2 along the circumferential direction of the anchor ear 3 along with the rotation of the main shaft 2, and only less lubricating grease can extend between the main shaft 2 and the anchor ear 3 along the axial direction of the anchor ear 3, so when the width of the groove 4 in the axis OO' direction of the anchor ear 3 is smaller, the inner ring of the anchor ear 3 cannot be covered by the lubricating grease in a large area beyond the circumferential ring of the groove 4, and therefore, after long-term use, larger friction force is generated, even abrasion occurs, and an action mechanism of the circuit breaker cannot reliably open or close a brake.

This application above-mentioned scheme is through the projection dislocation set of at least two recesses 4 on staple bolt 3's axis for all being possible to be smeared by the lubricating grease at the circumference surface of the inner circle of staple bolt 3 that the recess 4 of difference corresponds and cover, thereby increase lubricating grease is to the lubrication area of main shaft 2 and staple bolt 3 contact surface in the long-term in-process of using of circuit breaker, further reduces the frictional force between main shaft 2 and the staple bolt 3.

In an alternative, at least one recess 4 is located on the upper half-peripheral wall of the inner ring of the anchor 3, based on the mounting orientation of the circuit breaker in use.

By adopting the scheme, after the lubricating grease is filled in the groove 4, the lubricating grease can flow out of the groove 4 under the action of gravity, particularly the surface of the main shaft 2 below the groove 4, which is contacted with the anchor ear 3, so that the adhesion area of the lubricating grease is increased.

Fig. 3 is a schematic structural view of an assembled state of a mounting plate, a hoop and a spindle of the present application, and fig. 4 is a schematic structural view of an disassembled state of a mounting plate, a hoop and a spindle of the present application, as shown in fig. 3 and fig. 4, in an alternative manner, the fixing portion 1 includes a mounting plate 5, a notch 51 is provided on a side of the mounting plate 5 close to the spindle 2, and the hoop 3 is at least partially located in the notch 51.

For example, the notch 51 may be U-shaped, the deepest part of the notch 51 and two sides of the notch 51 may be abutted against the outer ring of the anchor ear 3, or have a smaller gap, so that the anchor ear 3 can be limited in the notch 51, and is not easy to displace substantially along with rotation of the main shaft 2, thereby being beneficial to improving accuracy and reliability of opening and closing of the circuit breaker.

It can be appreciated that the notch 51 may be other shapes, so long as the anchor ear 3 is located in the notch 51, the anchor ear 3 can be limited to a certain extent, and stability and reliability of the anchor ear 3 can be improved, compared with the case that the anchor ear 3 is not located in the notch 51.

It should be emphasized that the anchor ear 3 is at least partially located in the notch 51, and does not represent that the spindle 2 is also at least partially located in the notch 51, but whether the spindle 2 is completely or partially located in the notch 51, the notch 51 can limit the anchor ear 3 to a certain extent, so that stability and reliability of the anchor ear 3 are improved.

Illustratively, in one alternative, the spindle 2 is at least partially positioned within the notch 51.

When the main shaft 2 is arranged on the inner ring of the hoop 3, the main shaft 2 is at least partially positioned in the notch, so that the structure of the circuit breaker is more compact, the size is reduced, the side wall of the notch 51 can be quickly supported without continuous movement after the hoop 3 generates a small amount of displacement in the action process of the main shaft 2, the position stability of the hoop 3 is higher, and the accuracy and the reliability of opening and closing of the circuit breaker are improved.

In an alternative form, the shape of the notch 51 is adapted to the shape of the outer ring of the portion of the anchor ear 3 located within the notch 51. That is, the shape of the notch 51 is the same as or similar to the shape of the part of the hoop 3 for being mounted in the notch 51, for example, when the shape of the outer ring of the hoop 3 is annular, the shape of the notch 51 may be a semi-annular shape with a diameter slightly larger than the diameter of the outer ring of the hoop 3; when the outer ring of the anchor ear 3 is square, and a right angle of the square is positioned in the notch 51, the shape of the notch 51 can be similar to that of the right angle, so that when the outer ring of the anchor ear 3 is positioned in the notch 51, the space allowance between the notch 51 and the outer ring of the anchor ear 3 is smaller, the movable space of the anchor ear 3 can be further limited, the movable amplitude of the anchor ear 3 is reduced, and the accuracy and reliability of opening and closing of the circuit breaker are improved.

Therefore, the notch 51 on the mounting plate 5 is used for accommodating the anchor ear 3, so that the structure of the circuit breaker is more compact, the size is reduced, the notch 51 can also limit the position of the anchor ear 3, the relative position of the anchor ear 3 and the mounting plate 5 is fixed, the anchor ear 3 is not easy to displace greatly in the process of moving the main shaft 2, and the action precision of an action mechanism of the circuit breaker is improved.

As shown in fig. 2 and 4, in an alternative manner, the anchor ear 3 includes a first semi-annular locking portion 31 and a second semi-annular locking portion 32, and end portions of two semi-rings of the first locking portion 31 and end portions of two semi-rings of the second locking portion 32 are respectively butted to form the whole-circle anchor ear 3.

Such staple bolt 3 structure, when the installation, can be with first lock portion 31 and second lock portion 32 separation to overlap respectively on main shaft 2, with the tip of two semi-rings of first lock portion 31 and second lock portion 32 butt joint respectively in order to form whole circle staple bolt 3 again, thereby made things convenient for the assembly between staple bolt 3 and the main shaft 2 greatly.

In an alternative manner, as shown in fig. 4, one of the end portions of the first locking portion 31 and the second locking portion 32 that abut is located within the notch 51, such that the sidewall of the notch 51 restrains the first locking portion 31 and the second locking portion 32 in the abutting state.

Since one of the end portions of the first locking portion 31 and the second locking portion 32 that are abutted is located in the notch 51, when the first locking portion 31 and the second locking portion 32 move in opposite directions, the inner wall of the notch 51 will abut against the first locking portion 31 and the second locking portion 32 respectively to limit the movement of the two in opposite directions, so that the first locking portion 31 and the second locking portion 32 are limited in the abutted state.

As shown in fig. 2 and 4, in an alternative manner, the first locking portion 31 is provided with a first limiting portion 33, the second locking portion 32 is provided with a second limiting portion 34, the first limiting portion 33 is disposed on one side of the mounting plate 5, and the second limiting portion 34 is disposed on the other side of the mounting plate 5; the circuit breaker further comprises a connecting piece 6, the connecting piece 6 being used for fixing the first limit part 33 and the second limit part 34 on the mounting plate 5.

The first limiting portion 33 may be integrally formed with the first locking portion 31, or may be connected to the first locking portion 31 by welding, riveting or screwing, which is not limited in this embodiment, and it is understood that after the first limiting portion 33 and the first locking portion 31 are in a fixed state, the relative position between the two is unchanged, and fixing the position of the first limiting portion 33 corresponds to fixing the position of the first locking portion 31.

Similarly, the second locking portion 32 and the second limiting portion 34 may have the same or similar structure as the first locking portion 31 and the first limiting portion 33, and when the second limiting portion 34 and the second locking portion 32 are in a fixed state, the relative position between the two is unchanged, and the position of the second limiting portion 34 is fixed, which is equivalent to the position of the second locking portion 32.

For example, the first limiting portion 33 and the second limiting portion 34 may each have a plate-like structure, and after the first limiting portion 33 and the second limiting portion 34 are connected to the mounting board 5 by the connecting member 6, one side surface of the first limiting portion 33 is attached to one side surface of the mounting board 5, and one side surface of the second limiting portion 34 is also attached to the other side surface of the mounting board 5.

Alternatively, the connection member 6 may be a screw, a rivet, a bolt-nut assembly, or the like.

The first and second stopper portions 33 and 34 may be fixed to the mounting plate 5 by one or more connection members 6, respectively, or the first and second stopper portions 33 and 34 may be fixed to the mounting plate 5 by the same connection member 6. For example, when the connecting member 6 is a bolt-and-nut assembly, the bolt may sequentially pass through the first limiting portion 33, the mounting plate 5, and the second limiting portion 34, and the nut may be screwed into one end passing through the second limiting portion 34 to tightly connect the first limiting portion 33, the mounting plate 5, and the second limiting portion 34 together.

Through adopting above-mentioned scheme, first spacing portion 33 and second spacing portion 34 are located the both sides of mounting panel 5 respectively, after connecting piece 6 is fixed first spacing portion 33 and second spacing portion 34 on mounting panel 5, staple bolt 3 is fixed on mounting panel 5 promptly, and first spacing portion 33 and second spacing portion 34 can restrict the removal of staple bolt 3 respectively from the both sides of mounting panel 5 for staple bolt 3 is fixed more firmly on mounting panel 5, is difficult to produce the displacement along the thickness direction of mounting panel 5, and after main shaft 2 and staple bolt 3 assembly, the position of main shaft 2 and the annex of connection on main shaft 2 also will be more stable and accurate.

To sum up, in this embodiment of the present application, the anchor ear 3 is used to connect the main shaft 2 and the fixing portion 1, so that after the main shaft 2 or the anchor ear 3 wears, the main shaft or the anchor ear 3 can be adjusted by replacing the anchor ear 3, thereby being convenient for recovering the action accuracy of the action mechanism of the circuit breaker. The groove 4 is formed in the inner ring of the hoop 3, friction between the hoop 3 and the main shaft 2 can be reduced by reducing the contact area between the hoop 3 and the main shaft 2, more lubricating grease can be filled in the groove 4, the hoop 3 and the main shaft 2 are soaked for a longer time, friction force during relative rotation between the hoop 3 and the main shaft 2 is reduced, and the reliability of switching-on and switching-off of the circuit breaker can be kept high for a long time.

Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. The circuit breaker is characterized by comprising a fixing part, a main shaft and a hoop; the anchor ear is connected on the fixed part, the inner race cover of anchor ear is located the main shaft periphery, just be equipped with the recess on the inner circle of anchor ear, when the action mechanism action of circuit breaker, the main shaft is relative the anchor ear rotates.

2. The circuit breaker of claim 1, wherein an edge of the groove is located within an inner ring of the anchor ear and does not coincide with an inner ring edge of the anchor ear.

3. The circuit breaker according to claim 2, characterized in that said recess is provided with one or more.

4. A circuit breaker according to claim 3, wherein when a plurality of grooves are provided, at least two grooves are arranged in a staggered projection on the axis of the anchor ear.

5. A circuit breaker according to claim 3 wherein at least one recess is located in the upper half peripheral wall of the inner ring of the anchor ear, based on the mounting orientation of the circuit breaker in use.

6. The circuit breaker of any one of claims 1-5, wherein the securing portion comprises a mounting plate having a notch on a side of the mounting plate proximate the main shaft, the anchor ear being at least partially positioned within the notch.

7. The circuit breaker of claim 6, wherein the notch is shaped to fit the shape of the outer race of the portion of the anchor ear that is located within the notch.

8. The circuit breaker of claim 6, wherein the anchor ear comprises a first semi-annular lock portion and a second semi-annular lock portion, the ends of the two semi-rings of the first lock portion and the ends of the two semi-rings of the second lock portion are respectively butted to form a complete turn of the anchor ear;

one end part of the first locking part and one end part of the second locking part are in butt joint in the notch, so that the side wall of the notch limits the first locking part and the second locking part in a butt joint state.

9. The circuit breaker of claim 8, wherein the first locking portion is provided with a first limit portion, the second locking portion is provided with a second limit portion, the first limit portion is arranged on one side of the mounting plate, and the second limit portion is arranged on the other side of the mounting plate;

the circuit breaker further comprises a connecting piece, wherein the connecting piece is used for fixing the first limiting part and the second limiting part on the mounting plate.

10. The circuit breaker of claim 6, wherein the main shaft is at least partially located within the notch.