CN218769375U - Operating mechanism and moulded case circuit breaker - Google Patents

Abstract

The embodiment of the application provides an operating mechanism and a molded case circuit breaker, and belongs to the technical field of electrical equipment. The operating mechanism includes a stored energy spring and a shield. One end of the energy storage spring is connected with the lever, and the other end of the energy storage spring is connected with the connecting rod shaft. The protective cover is provided with an accommodating cavity, the energy storage spring is positioned in the accommodating cavity, and the protective cover is used for blocking metal objects generated when the molded case circuit breaker is disconnected. The application can effectively reduce the possibility that metal objects are adhered to the energy storage spring to reduce the performance of the energy storage spring, thereby reducing the possibility that the working reliability of the molded case circuit breaker is reduced due to the damage of the energy storage spring. In addition, the protective cover can reduce the possibility that metal objects go deep into the operating mechanism, so that the possibility that the metal objects damage other structural components in the operating mechanism can be reduced, and the working reliability of the molded case circuit breaker is further improved.

Description

Operating mechanism and moulded case circuit breaker

Technical Field

The embodiment of the application relates to the technical field of electrical equipment, in particular to an operating mechanism and a molded case circuit breaker.

Background

The plastic case circuit breaker is a commonly used protective electric appliance, has the functions of switching on and off load current and protecting overload and short circuit of the load current, and is widely applied to overload and short circuit protection of various power distribution systems and motors.

However, the structural members of the conventional molded case circuit breaker are easily affected by high-temperature metal objects, so that the molded case circuit breaker has low operational reliability.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide an operating mechanism and a molded case circuit breaker, which can effectively reduce the possibility that a metal object is adhered to an energy storage spring to reduce the performance of the energy storage spring, so as to reduce the possibility that the operational reliability of the molded case circuit breaker is reduced due to the damage of the energy storage spring.

In a first aspect of the embodiments of the present application, an operating mechanism is provided, where the operating mechanism is applied to a molded case circuit breaker, the molded case circuit breaker includes a lever and a link shaft, and the operating mechanism includes an energy storage spring and a protective cover. One end of the energy storage spring is connected with the lever, and the other end of the energy storage spring is connected with the connecting rod shaft. The protective cover is provided with an accommodating cavity, the energy storage spring is positioned in the accommodating cavity, and the protective cover is used for blocking metal objects generated when the molded case circuit breaker is disconnected.

Through the scheme, the possibility that metal objects are adhered to the energy storage spring to reduce the performance of the energy storage spring can be effectively reduced, so that the possibility that the working reliability of the molded case circuit breaker is reduced due to the damage of the energy storage spring can be reduced. In addition, the protective cover can reduce the possibility that metal objects go deep into the operating mechanism, so that the possibility that the metal objects damage other structural components in the operating mechanism can be reduced, and the working reliability of the molded case circuit breaker is further improved.

In some embodiments, the stored energy spring includes a coil portion, the coil portion being located within the receiving cavity.

Through the scheme, the protective cover can protect the spiral part of the energy storage spring, so that the energy storage spring is prevented from being damaged by high-temperature metal objects, and the possibility of reducing the working reliability of the molded case circuit breaker due to the damage of the energy storage spring can be reduced.

In some embodiments, the energy storage spring further comprises two drag hooks, wherein the two drag hooks are respectively connected to two ends of the spiral part; the one end of protection casing towards the connecting rod axle is uncovered, and the terminal surface that the protection casing is close to the one end of lever is provided with the mounting hole, and a drag hook passes the mounting hole and is connected with the lever.

The protection casing one end of this kind of structure has the terminal surface, and this terminal surface can increase the protection area of protection casing, and the setting up of this terminal surface makes the protection casing can block the metallics along energy storage spring's axis direction for the protection casing can diversely protect energy storage spring, has further reduced the metallics and has glued and cover in energy storage spring and reduce the possibility of energy storage spring performance.

In some embodiments, the mounting holes are slotted through holes that fit into the draw hooks.

Set up the cell type through-hole at the terminal surface that the protection casing is close to lever one end, compare in the hole that sets up other shapes, the area reduction degree to this terminal surface is minimum for this terminal surface is used for protecting energy storage spring's effective area great, consequently, sets up the mounting hole into the cell type through-hole with the drag hook adaptation, is convenient for make the protection casing be close to the one end of lever and has great area to resist the metallics, thereby is convenient for reduce the metallics and glue and cover in energy storage spring and reduce the possibility of energy storage spring performance.

In some embodiments, the number of the energy storage springs and the number of the mounting holes are multiple, the energy storage springs correspond to the mounting holes one to one, and the drag hook of one energy storage spring penetrates through the corresponding mounting hole.

Through the scheme, the protective cover can be suitable for a plurality of molded case circuit breakers with the energy storage springs in the operating mechanism, and the application range of the protective cover is widened.

In some embodiments, a limiting structure is arranged on the wall of the accommodating cavity, and divides the accommodating cavity into a plurality of sub-cavities, and each sub-cavity accommodates one energy storage spring.

Through the scheme, the limiting structure can play a role in guiding and limiting the movement of the energy storage spring, and the energy storage spring is guided to move towards the direction of the mounting hole along a straight line as far as possible so as to improve the mounting efficiency of the energy storage spring; in addition, limit structure can be separated into a plurality of sub-chambeies with the holding chamber, and every energy storage spring all is arranged in respective sub-chamber, can restrict energy storage spring excessively bending deformation and interfere adjacent energy storage spring when tensile deformation, has reduced adjacent energy storage spring mutual interference's possibility when assembly or tensile deformation.

In some embodiments, the retaining structure is configured as a plate.

Through the scheme, the containing cavity can be divided into the plurality of sub-cavities which are independent in bending through the flat-plate limiting structure, so that the energy storage springs in one sub-cavity can collide with the limiting structure when being subjected to bending deformation, and the energy storage springs in the adjacent sub-cavities can not be collided, therefore, on one hand, the amplitude of the energy storage springs which are subjected to bending deformation can be reduced, and on the other hand, the possibility of mutual interference between the adjacent energy storage springs can be reduced.

In some embodiments, the limiting structure is provided with an avoiding groove along the arrangement direction of the plurality of energy storage springs, and the energy storage springs are partially positioned in the avoiding groove.

Through above-mentioned scheme, guaranteeing that limit structure plays the guide limiting displacement to energy storage spring's installation, and under the condition that carries out the restriction to energy storage spring bending deformation in the sub-chamber, can also reduce the degree of difficulty that brings for limit structure's shaping because of adjacent energy storage spring interval is less.

In some embodiments, both ends of the protective cover are open, and both ends of the energy storage spring extend out of the open.

The protection casing both ends of this kind of structure do not all have the terminal surface, and the structure at both ends is the same completely, and the processing degree of difficulty is lower to when assembling the protection casing to moulded case circuit breaker, can need not spend time and energy to confirm the exact assembly direction, be convenient for reduce the assembly degree of difficulty.

In a second aspect of the embodiments of the present application, there is provided a molded case circuit breaker including the operating mechanism in the first aspect.

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

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic partial structure diagram of a molded case circuit breaker according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of a molded case circuit breaker according to an embodiment of the present application.

Fig. 3 is an assembly structure diagram of an energy storage spring and a protective cover according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a protective cover according to an embodiment of the present application.

Description of reference numerals:

1. a lever; 2. a link shaft; 3. an energy storage spring; 31. pulling a hook; 32. a helical portion; 4. a protective cover; 41. an accommodating cavity; 42. mounting holes; 411. a limiting structure; C. an avoidance groove; x, the axial direction of the energy storage spring; y, arrangement direction of the energy storage springs.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 application 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 this application and the description of the figures are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The following description is given with directional terms in the drawings, and is not intended to limit the specific structure of the operating mechanism and the molded case circuit breaker of the present application. For example, in the description of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Further, expressions of directions indicated such as X direction, Y direction for explaining the operation and construction of each member of the operating mechanism and the molded case circuit breaker of the present embodiment are not absolute but relative, and although these indications are appropriate when the members of the operating mechanism and the molded case circuit breaker are in the positions shown in the drawings, when the positions are changed, the directions should be interpreted differently to correspond to the changes.

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

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

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic view of a partial structure of a molded case circuit breaker provided in an embodiment of the present application, and fig. 2 is a cross-sectional view of the molded case circuit breaker provided in the embodiment of the present application, and as shown in fig. 1 and fig. 2, the molded case circuit breaker includes a lever 1 and a link shaft 2. The operating mechanism provided by the embodiment of the application comprises an energy storage spring 3 and a protective cover 4. One end of the energy storage spring 3 is connected with the lever 1, and the other end is connected with the connecting rod shaft 2. As shown in fig. 3, the protective cover 4 has an accommodating cavity 41, the energy storage spring 3 is located in the accommodating cavity 41, and the protective cover 4 is used for blocking metal objects generated when the molded case circuit breaker is disconnected.

The lever 1 is a structural member for sleeving a handle in an operating mechanism in the molded case circuit breaker, and the connecting rod shaft 2 is a structural member for mounting a connecting rod in the operating mechanism. Drag hook 31 has at energy storage spring 3's both ends, is connected with energy storage spring 3's spiral part 32 between two drag hooks 31, and the drag hook 31 of energy storage spring 3 one end articulates in lever 1, and the drag hook 31 of the energy storage spring 3 other end articulates in connecting rod axle 2 to realize energy storage spring 3's installation.

After the energy storage spring 3 is installed on the molded case circuit breaker, when the molded case circuit breaker is opened or closed, the spiral part 32 of the energy storage spring 3 is stretched and deformed to store energy, so that elastic potential energy is released when the molded case circuit breaker is opened or closed, and the structural member which is changed in position when the molded case circuit breaker is opened or closed is rapidly reset.

When the moulded case circuit breaker breaks the short-circuit current, an electric arc can be generated between the moving contact and the fixed contact. If do not in time shift and extinguish these electric arcs, will cause the damage to the contact to can influence moulded case circuit breaker's normal use, consequently, moulded case circuit breaker is provided with the explosion chamber usually, extinguishes with the electric arc that produces when opening moulded case circuit breaker. The arc extinguishing chamber cannot instantly extinguish all arcs, and the arc extinguishing chamber and the operating mechanism cannot be completely isolated due to the limited space in the molded case circuit breaker, so that the arcs which are not extinguished in the arc extinguishing chamber can be jumbled from the arc extinguishing chamber to the operating mechanism. The arc has a high temperature, and the arc may burn a metal structure after escaping from the arc extinguishing chamber to generate high-temperature metal substances such as metal vapor, metal solution, metal particles, and the like, and the high-temperature metal substances may damage the structure in the operating mechanism when entering the operating mechanism.

For example, the structural member in the operating mechanism may be an energy storage spring. When the metal object of high temperature gets into operating device and glues on covering the energy storage spring 3 in operating device, especially glue when covering the spiral part 32 of connecting between the drag hook 31 at energy storage spring 3 both ends, can make energy storage spring 3's power value reduce, cause energy storage spring 3 performance reduction or even inefficacy, thereby influence energy storage spring 3 and drive the structure that takes place the position change when opening brake operation or closing brake operation in time and reset, it is visible, there is the risk that energy storage spring 3 can't drive operating device and carry out normal divide-shut brake operation, can influence moulded case circuit breaker's normal work like this.

In view of the above analysis, the present embodiment provides the protection cover 4 in the operation mechanism to protect the energy storage spring 3 by the protection cover 4. Wherein, the protection cover 4 is a hollow structure so as to accommodate the energy storage spring 3. The shape and the size of the protection cover 4 can be set according to the shape and the size of the energy storage spring 3, so long as it is ensured that the protection cover 4 can cover the energy storage spring 3, and the setting of the protection cover 4 can not interfere with other structural members. The material of the protective cover 4 may be plastic, metal, or the like, as long as it can resist high temperature, and this is not limited in the embodiment of the present application.

In the embodiment of the present application, the energy storage spring 3 is located in the accommodating cavity 41, which is equivalent to a protective barrier arranged outside the energy storage spring 3. If the metal object with high temperature is sprayed towards the energy storage spring 3, one part of the metal object may collide with the protective cover 4 and fall off, the other part of the metal object may collide with the protective cover 4 and change the movement direction, and no matter the metal object falls off or changes the movement direction, the metal object is difficult to bypass the protective cover 4 and be adhered on the energy storage spring 3, so that the possibility that the metal object is adhered on the energy storage spring 3 to reduce the performance of the energy storage spring 3 can be effectively reduced, and the possibility that the work reliability of the molded case circuit breaker is reduced due to the damage of the energy storage spring 3 can be reduced. In addition, because the metal object can drop or change the direction of motion after colliding with protection casing 4, so the setting of protection casing 4 can reduce the metal object and go deep into operating device's possibility, consequently can also reduce the metal object and cause the possibility of damage to other structures in the operating device, has further improved moulded case circuit breaker's operational reliability.

In some embodiments, since the spiral portion 32 of the energy storage spring 3 is most susceptible to high temperature metal, when the shield 4 is disposed, the spiral portion 32 of the energy storage spring 3 may be completely located in the accommodating cavity 41 of the shield 4 as shown in fig. 2 and 3. Thus, the protection cover 4 can protect the spiral part 32 of the energy storage spring 3 from being damaged by high-temperature metal objects, so that the possibility that the working reliability of the molded case circuit breaker is reduced due to the damage of the energy storage spring 3 can be reduced.

The energy storage spring 3 is to be located in the accommodating cavity 41, and at least one of the two ends of the protection cover 4 is to have an opening, and for the structure of the protection cover 4, in some embodiments, the two ends of the protection cover 4 may be both open, and both ends of the energy storage spring 3 are both extended from the opening. The protection cover 4 both ends of this kind of structure do not all have the terminal surface, and the structure at both ends is the same completely, and the processing degree of difficulty is lower to when assembling protection cover 4 to moulded case circuit breaker, can need not spend time and energy to confirm correct assembly direction, be convenient for reduce the assembly degree of difficulty.

In other embodiments, since the inner space of the molded case circuit breaker is limited, and the shielding member cannot be disposed on the side of the operating mechanism close to the lever 1, metal objects generated by burning metal structures by an arc that is not extinguished in the arc extinguish chamber can easily enter the operating mechanism from the side of the operating mechanism close to the lever 1, based on this, as shown in fig. 3 and 4, one end of the protective cover 4 facing the link shaft 2 may be open, an end surface of the protective cover 4 close to one end of the lever 1 may be provided with a mounting hole 42, and the draw hook 31 close to the lever 1 passes through the mounting hole 42 to be connected with the lever 1. The protection casing 4 of this kind of structure has the terminal surface near the one end of lever 1, and this terminal surface can increase the protection area of protection casing 4, and the setting up of this terminal surface makes protection casing 4 can block the metallics along energy storage spring's axis direction X for protection casing 4 can diversely protect energy storage spring 3, has further reduced the metallics and has glued and cover in energy storage spring 3 and reduce the possibility of energy storage spring 3 performance.

The shape and size of the mounting hole 42 may be set according to the shape and size of the hook 31, and as shown in fig. 4, the mounting hole 42 may be a groove-shaped through hole adapted to the hook 31.

The cell type through-hole is the through-hole of rectangular shape promptly, under the prerequisite of guaranteeing that drag hook 31 can pass mounting hole 42 just, set up mounting hole 42 into the cell type through-hole and compare in setting up mounting hole 42 into the cylinder hole, the hole of other shapes such as prism hole, its cross-sectional area is minimum, consequently, the terminal surface that is close to lever 1 one end at protection casing 4 sets up the cell type through-hole, compare in the hole that sets up other shapes, the area reduction degree to this terminal surface is minimum, it is great to make this terminal surface be used for protecting energy storage spring 3's effective area, it has great area to resist the metallics to be convenient for make protection casing 4 be close to the one end of lever 1, thereby be convenient for reduce the metallics and glue and cover in energy storage spring 3 and reduce the possibility of energy storage spring 3 performance.

Based on the previous embodiment, the pull hook 31 of the energy storage spring 3 needs to be hooked with the lever 1 through the mounting hole 42 formed on the end face of the protection cover 4 near one end of the lever 1. When the number of the energy storage springs 3 is one, the number of the mounting holes 42 on the end surface is one; when the number of the energy storage springs 3 is multiple, the number of the mounting holes 42 on the end surface also needs to be multiple, the energy storage springs 3 correspond to the mounting holes 42 one by one, and the draw hook 31 of one energy storage spring 3 penetrates through the corresponding mounting hole 42.

Regardless of the number of the mounting holes 42, all the mounting holes 42 may be groove-shaped through holes adapted to the hooks 31 of the corresponding energy storage springs 3. The plurality of mounting holes 42 may be provided in the end surface of the protection cover 4 near one end of the lever 1 in the arrangement direction Y of the plurality of energy storage springs.

In this embodiment, the number of the mounting holes 42 is set to be a plurality of, and is the same as the number of the energy storage springs 3, so that the protective cover 4 can be applied to a plurality of molded case circuit breakers with the energy storage springs 3 in the operating mechanism, and the application range of the protective cover 4 is improved.

In the case that the number of the energy storage springs 3 and the number of the mounting holes 42 are plural, in some embodiments, as shown in fig. 3, the cavity wall of the accommodating cavity 41 may be provided with a limiting structure 411, the limiting structure 411 divides the accommodating cavity 41 into a plurality of sub-cavities, one energy storage spring 3 is accommodated in each sub-cavity, and the limiting structure 411 is used for limiting the bending deformation of the energy storage spring 3 in the sub-cavity.

The spacing structure 411 may be disposed between two adjacent mounting holes 42. The size of a plurality of sub-chambers that limit structure 411 separates into with holding chamber 41 can be the same, also can be inequality, and supposing that a plurality of energy storage spring 3's in the operating device size is the same, then limit structure 411 can equally divide holding chamber 41 into a plurality of sub-chambers that the size is the same, reserves the accommodation space of the same size for a plurality of energy storage spring 3 that the size is the same.

The assembly process of the energy storage spring 3, the protective cover 4 and other structural components can be as follows: the shield 4 is first placed in a predetermined position with the open end of the shield 4 facing the link shaft 2. The lever 1 is then mounted on the end of the protective cover 4 facing away from the link shaft 2. Then, an energy storage spring 3 is close to the end face close to the installation hole 42 from the open end of the protective cover 4 until a hook at the end of the energy storage spring 3 passes through the installation hole 42 opposite to the energy storage spring 3 to be hung on the lever 1, and then the installation of the energy storage spring 3 can be completed. The installation of the rest of the energy storage springs 3 is similar to the installation of the energy storage springs 3, and the detailed description is omitted here.

When the energy storage spring 3 is installed, the end portion of the energy storage spring 3 which enters the accommodating cavity 41 first is prone to shaking in the process of passing through the accommodating cavity 41, so that the energy storage spring 3 is prone to swing indefinitely, and the risk that the draw hook 31 of the energy storage spring 3 cannot penetrate through the installation hole 42 to be connected with the lever 1 in a hanging mode may exist. By arranging the limiting structure 411 on the cavity wall of the accommodating cavity 41, the limiting structure 411 can play a role in guiding and limiting the movement of the energy storage spring 3, and guide the energy storage spring 3 to move towards the direction of the mounting hole 42 along a straight line as much as possible so as to improve the mounting efficiency of the energy storage spring 3; in addition, the limiting structure 411 can divide the accommodating cavity 41 into a plurality of sub-cavities, each energy storage spring 3 is located in each sub-cavity, and therefore the energy storage springs 3 can be limited from being bent excessively to deform when being stretched and deformed to interfere with the adjacent energy storage springs 3, and the possibility that the adjacent energy storage springs 3 interfere with each other when being assembled or stretched and deformed is reduced.

In some embodiments, the limiting structure 411 may be a complete flat plate structure when the distance between adjacent energy storage springs 3 is large.

Wherein, along the axis direction X of the energy storage spring, the size of the limiting structure 411 may be equal to the size of the protection cover 4.

Through this flat limit structure 411 can separate into a plurality of subcavities that the bending is independent with holding chamber 41, like this, when energy storage spring 3 in a subcavity takes place bending deformation, can collide limit structure 411, and can not collide energy storage spring 3 in the adjacent subcavity, consequently, can reduce energy storage spring 3 and take place bending deformation's range on the one hand, on the other hand can reduce the possibility of mutual interference between the adjacent energy storage spring 3.

In other embodiments, when the distance between adjacent energy-storing springs 3 is small, and it is inconvenient to form a thin plate-shaped limiting structure 411 on the cavity wall of the accommodating cavity 41, as shown in fig. 3, the limiting structure 411 may be provided with an avoiding groove C along the arrangement direction Y of the plurality of energy-storing springs, and the energy-storing springs 3 are partially located in the avoiding groove C.

The avoidance groove C may penetrate the limiting structure 411 along the arrangement direction Y of the plurality of energy storage springs; along energy storage spring's axial direction X, dodge the size of groove C and can equal protection casing 4 or limit structure 411's size, that is to say, dodge groove C and can link up limit structure 411 along energy storage spring's axial direction X.

When the energy storage spring 3 is bent and deformed in the sub-cavity where the energy storage spring 3 is located, one side of the energy storage spring 3 close to the adjacent energy storage spring 3, or one side of the energy storage spring 3 close to the limiting structure 411 may be located in the avoiding groove C. Therefore, in order to reduce the possibility that the stored energy spring 3 partially enters the adjacent sub-chamber after the stored energy spring 3 is bent and deformed, and interferes with the stored energy spring 3 in the adjacent sub-chamber, the groove width of the escape groove C may be set smaller than the diameter of the stored energy spring 3.

Through above-mentioned scheme, guaranteeing that limit structure 411 plays direction limiting displacement to energy storage spring 3's installation, and under the condition that carries out the restriction to energy storage spring 3 bending deformation in the sub-cavity, can also reduce because of the less degree of difficulty that brings of limit structure 411 of 3 intervals of adjacent energy storage spring.

The embodiment of the present application further provides a molded case circuit breaker including the operating mechanism in the foregoing embodiment. Since the structure of the operating mechanism and the advantages thereof have been described in detail in the foregoing embodiments, the detailed description of the present application is omitted.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. An operating mechanism applied to a molded case circuit breaker including a lever and a link shaft, the operating mechanism comprising:

one end of the energy storage spring is connected with the lever, and the other end of the energy storage spring is connected with the connecting rod shaft;

the protective cover is provided with an accommodating cavity, the energy storage spring is positioned in the accommodating cavity, and the protective cover is used for blocking metal objects generated when the molded case circuit breaker is disconnected.

2. The operating mechanism of claim 1 wherein said stored energy spring includes a coil portion, said coil portion being located within said receiving cavity.

3. The operating mechanism according to claim 2, wherein the energy storage spring further comprises two pulling hooks, and the two pulling hooks are respectively connected to two ends of the spiral part; the one end that the protection casing faced the connecting rod axle is uncovered, the protection casing is close to the terminal surface of the one end of lever is provided with the mounting hole, one the drag hook passes the mounting hole with the lever is connected.

4. The operating mechanism as claimed in claim 3, wherein the mounting hole is a slotted through hole adapted to the draw hook.

5. The operating mechanism as claimed in claim 3, wherein the number of the energy storage springs and the number of the mounting holes are both plural, the plural energy storage springs correspond to the plural mounting holes one by one, and the pulling hook of one energy storage spring passes through the corresponding mounting hole.

6. The operating mechanism according to claim 5, wherein a limiting structure is arranged on the wall of the accommodating cavity, and divides the accommodating cavity into a plurality of sub-cavities, and each sub-cavity accommodates one energy storage spring.

7. The operating mechanism of claim 6 wherein the limiting structure is configured as a plate.

8. The operating mechanism according to claim 6, wherein the limiting structure is provided with an avoiding groove along the arrangement direction of the energy storage springs, and the energy storage springs are partially positioned in the avoiding groove.

9. The operating mechanism of claim 1 wherein both ends of the shield are open and both ends of the stored energy spring extend through the openings.

10. A molded case circuit breaker characterized by comprising the operating mechanism according to any one of claims 1 to 9.

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