CN211350501U - Miniature circuit breaker and shell thereof - Google Patents

Abstract

The utility model discloses a miniature circuit breaker and casing thereof belongs to the low-voltage apparatus field, a miniature circuit breaker's casing, including first shell and second shell, first shell and second shell joint cooperation are fixed as an organic whole through the fastener, and one side of first shell is fixed with the assembly and encloses the fender, and the assembly encloses the fender and encloses the fender including the head and the tail connect gradually on, a left side encloses the fender, encloses the fender down, the right side encloses the fender, first locating plate, sets up the one side that encloses the fender down, first locating plate and enclose down and leave the space between the fender. The utility model discloses a miniature circuit breaker and casing thereof can install magnetism trip unit, and mountable shunt electromagnet can not only regard as the shell of the L utmost point, also can regard as the shell of the N utmost point again for the shell of the L utmost point is general with the N utmost point shell.

Description

Miniature circuit breaker and shell thereof

Technical Field

The utility model belongs to the low-voltage apparatus field especially relates to a miniature circuit breaker and casing thereof.

Background

The miniature circuit breaker, abbreviated as MCB, is a terminal protection electrical appliance which is most widely used in the power distribution device of an electrical terminal. The MCB is basically fixed in appearance, size, wiring mode and the like, is often used for the tail end of power distribution, is arranged on a plurality of branches and plays a role in protecting overcurrent of electric equipment and manually controlling the overcurrent of the electric equipment. With the development and requirements of the market and technology, more requirements are put forward on the original MCB, for example, a tripping and opening mechanism capable of being driven is added on the original MCB, so that the functions of the MCB can be greatly expanded. For some upgrading projects, it is desirable that the module of the MCB is unchanged (the module refers to the thickness of the product is a multiple of 18mm, for example, 2 modules refers to the thickness of the product is about 36 mm), so that the original product can be directly replaced, and a shunt electromagnet is generally built in an existing MCB neutral pole (referred to as N pole) to meet the requirement of driving to trip and open the brake.

The most common structure of the existing product is that the L pole generally comprises a shell, a wiring terminal at the side of an incoming line, a magnetic trip assembly, a static contact, a moving contact, a connecting rod mechanism, a handle, a U-shaped rod, a wiring terminal at the side of an outgoing line and the like; the N pole is generally composed of a shell, a wiring terminal and a static contact on the side of an incoming line, a shunt electromagnet, a moving contact and link mechanism, a handle and a U-shaped rod, a wiring terminal on the side of the outgoing line and the like; because the magnetic trip assembly and the shunt electromagnet are different in structure (the magnetic trip assembly is driven by a large current, the number of turns of a coil is small, the shunt electromagnet is driven by a small current, and the number of turns of the coil is small), the shells of the L pole and the N pole are often different. The static iron core of the shunt electromagnet is provided with a clamp spring groove which is clamped on the magnetic yoke of the shunt electromagnet. The clamp spring groove structure and the groove width size are very small, so the clamp spring groove needs to be machined; the static iron core of the magnetic tripping component is only provided with the lug boss without the groove, can be produced by cold heading, and is high in efficiency, and the two static iron core structures are different.

The shell of the L pole is different from the shell of the N pole, so that two sets of shell molds are needed, and the cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature circuit breaker and casing thereof can install magnetism trip unit, and mountable shunt electromagnet can not only regard as the shell of the L utmost point, also can regard as the shell of the N utmost point again for the shell of the L utmost point is general with the N utmost point shell.

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

the utility model provides a pair of miniature circuit breaker's casing, including first shell and second shell, first shell and second shell joint cooperation are fixed as an organic whole through the fastener, and one side of first shell is fixed with the assembly and encloses the fender, and the assembly encloses the fender including the head and the tail connect gradually on enclose the fender, a left side encloses the fender, enclose the fender down, the right side encloses the fender, first locating plate sets up and encloses the one side that keeps off down, first locating plate and enclose down and leave the space between the fender.

Preferably, the number of the first positioning plates is two, and the two first positioning plates are arranged left and right and are consistent with the distance between the lower enclosing barriers.

Preferably, one end of one of the first positioning plates is provided with a limiting block.

Preferably, a second positioning plate is arranged between the other first positioning plate and the left enclosure.

Preferably, the distance between the second positioning plate and the lower enclosure is greater than the distance between the first positioning plate and the lower enclosure.

Preferably, the upper baffle comprises a first transverse baffle wall, a first turning wall, a second turning wall and a second transverse baffle wall, the first turning wall is arranged at one end of the first transverse baffle wall, the second turning wall is arranged at the other end of the first transverse baffle wall, and the second transverse baffle wall is arranged at the lower end of the second turning wall.

Preferably, the left surrounding barrier is provided with at least one lead channel.

The utility model also provides a miniature circuit breaker, including the casing of above-mentioned arbitrary.

The utility model has the advantages that:

1. the magnetic tripping component can be installed, and the shunt electromagnet can be installed, so that the magnetic tripping component not only can be used as an L-pole shell, but also can be used as an N-pole shell, and the L-pole shell and the N-pole shell are universal.

2. Because the N pole and the L pole are universal, the MCB can be distributed in a left L pole, a right N pole, a left N pole and a right L pole so as to meet the requirements of different use occasions.

3. The setting of this casing reduces the input of mould, reduces material and cost.

Drawings

Fig. 1 is a perspective exploded view of the present invention (an N-pole shunt electromagnet assembled as an N-pole housing).

Fig. 2 is a perspective exploded view of the present invention (an L-pole magnetic trip assembly assembled as an L-pole housing).

Fig. 3 is an assembly schematic diagram of the first housing and the yoke of the shunt electromagnet with N poles according to the present invention.

Fig. 4 is an enlarged schematic view of a in fig. 3.

Fig. 5 is an assembly diagram of the first housing and the yoke of the L-pole magnetic trip assembly of the present invention.

Fig. 6 is an enlarged schematic view of B in fig. 5.

Fig. 7 is a rear view of the coil bobbin, the incoming line side terminal and the static contact of the shunt electromagnet of the second housing and the N pole of the present invention.

Fig. 8 is a rear view of the second housing of the present invention with the magnetic trip assembly of the L-pole, the incoming line side terminal and the stationary contact.

The labels in the figures are: 3-a first housing, 4-a second housing, 5-an assembly fence, 51-an upper fence, 511-a first transverse fence, 512-a first turning fence, 513-a second turning fence, 514-a second transverse fence, 52-a left fence, 53-a lower fence, 54-a right fence, 55-a first positioning plate, 56-a limiting block, 57-a second positioning plate, 58-a lead channel.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Those not described in detail in this specification are within the skill of the art. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The embodiment provides a casing of a miniature circuit breaker, which comprises a first casing 3 and a second casing 4, wherein the first casing 3 and the second casing 4 are in clamping fit and fixed into a whole through a fastener (not shown), specifically, the first casing 3 and the second casing are fixed through threads, and the front side of the first casing 3 is fixed with an assembly enclosure 5 for assembling a magnetic trip component of an L pole or a shunt electromagnet of an N pole. Specifically, the assembly enclosing barrier 5 comprises an upper enclosing barrier 51, a left enclosing barrier 52, a lower enclosing barrier 53 and a right enclosing barrier 54 which are sequentially connected along the anticlockwise direction from head to tail, a first positioning plate 55 is arranged on the upper side of the lower enclosing barrier 53, and a gap is reserved between the first positioning plate 55 and the lower enclosing barrier 53. The first locating plates 55 are two in total, the two first locating plates 55 are arranged left and right and are consistent with the distance between the lower enclosing baffles 53, and the right end of the first locating plate 55 on the right side is provided with a limiting block 56. A second positioning plate 57 is arranged between the left first positioning plate 55 and the left surrounding barrier 52, and the distance between the second positioning plate 57 and the lower surrounding barrier 53 is greater than the distance between the first positioning plate 55 and the lower surrounding barrier 53. The upper baffle 51 includes a first transverse baffle wall 511, a first turning wall 512, a second turning wall 513 and a second transverse baffle wall 514, the first turning wall 512 is disposed at the left end of the first transverse baffle wall 511, the second turning wall 513 is disposed at the right end of the first transverse baffle wall 511, and the second transverse baffle wall 514 is disposed at the lower end of the second turning wall 513. Two lead channels 58 are formed in the left surrounding barrier 52, leads led out from the hollow lead posts 214 penetrate through the two lead channels 58, and the lead channels 58 play a certain fixing role for the leads. The shoulder hole has been seted up to the one end of the coil skeleton of the divide excitation electromagnet of the N utmost point of this embodiment for the boss of quiet iron core can hide in the coil skeleton, and quiet iron core passes through the coil skeleton and the yoke card is fixed. The moving and static iron cores and the push rod are all universal with the moving and static iron cores and the push rod of the L-pole magnetic tripping component.

Taking the use as an N-pole housing as an example:

as shown in fig. 1, 3, 4, and 7, during assembly, the shunt electromagnet with N pole is placed in the assembly enclosure 5, specifically, the positioning of the lower right corner of the magnetic yoke of the shunt electromagnet with N pole is realized through the cooperation of the right abdicating groove 17 and the limiting block 56, and the first plate 11 and the first positioning plate 55; the positioning of the upper right corner of the magnetic yoke of the shunt electromagnet with the N pole is realized through the cooperation of the third plate 13, the second turning wall 513, the fourth plate 14 and the first cross baffle wall 511; the upper left corner of the magnetic yoke of the shunt electromagnet with the N pole is positioned by the matching of the fourth plate 14 and the first cross baffle wall 511 and the matching of the second plate 12 and the first turning wall 512; the second plate 12 and the second positioning plate 57 are used to position the lower left corner of the magnetic yoke of the N-pole shunt electromagnet by the cooperation of the first plate 11 and the left first positioning plate 55. Thus, the assembly of the N-pole shunt electromagnet yoke is realized. Since the N-pole shunt electromagnet yoke is mounted above the first positioning plate 55, a space for mounting a connecting conductor is provided between the N-pole shunt electromagnet yoke and the lower surrounding shield 53. The connecting conductor is used for communicating the connecting terminal with the fixed contact to form a current path; the connecting terminal and the static contact of the N pole can also be designed to be not universal with the L pole, and the connecting terminal, the static contact and the connecting conductor of the N pole are designed into a whole or are designed into two parts for reconnection. After the assembly of the shunt electromagnet with the N pole is completed, when the second shell 4 is covered and combined with the first shell 3 into a whole, the shunt electromagnet with the N pole is pressed through the second shell 4, and a wiring terminal, a static contact and a connecting conductor on the inlet wire side of the N pole are pressed.

Take the use as an L-pole housing as an example:

as shown in fig. 2, 5, 6 and 8, during assembly, the magnetic trip assembly of the L pole is placed into the assembly enclosure 5, specifically, the lower side wall of the magnetic yoke of the magnetic trip assembly of the L pole is located in the gap between the first positioning plate 55 and the lower enclosure 53; the yoke left side wall of the L-pole magnetic trip assembly is located between the second positioning plate 57 and the left first positioning plate 55; the yoke right side wall of the L-pole magnetic trip assembly is located between the right first keeper plate 55 and the right rail 54. After the assembly of the magnetic trip assembly of the L pole is completed, when the second shell 4 is covered and combined with the first shell 3 into a whole, the magnetic trip assembly of the L pole is pressed through the second shell 4, and a wiring terminal and a static contact of the inlet wire side of the L pole are pressed.

Through the setting to first shell 3 and second shell 4 like this, can not only satisfy the assembly of the shunt electromagnet of N utmost point, also can satisfy the assembly of the magnetic trip subassembly of L utmost point. The investment of the die is reduced, and the material and the cost are reduced. Because the N pole and the L pole are universal, the MCB can be distributed in a left L pole, a right N pole, a left N pole and a right L pole so as to meet the requirements of different use occasions.

The embodiment also provides a miniature circuit breaker, which comprises the shell.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (8)

1. A case of a small-sized circuit breaker, characterized in that:

the first shell and the second shell are in clamping fit and fixed into a whole through a fastener;

an assembly enclosure is fixed on one side of the first shell;

the assembly enclosure comprises an upper enclosure, a left enclosure, a lower enclosure and a right enclosure which are sequentially connected end to end;

the first positioning plate is arranged on one side of the lower enclosing barrier, and a gap is reserved between the first positioning plate and the lower enclosing barrier.

2. A case for a small size circuit breaker according to claim 1, wherein:

the first locating plates are two in total, and the two first locating plates are arranged on the left and right sides and are consistent with the distance between the lower enclosing baffles.

3. A case for a small size circuit breaker according to claim 2, wherein:

one end of one of the first positioning plates is provided with a limiting block.

4. A case for a small size circuit breaker according to claim 3, wherein:

and a second positioning plate is arranged between the other first positioning plate and the left surrounding baffle.

5. A case for a small size circuit breaker according to claim 4, wherein:

the distance between the second positioning plate and the lower enclosing barrier is greater than the distance between the first positioning plate and the lower enclosing barrier.

6. A case for a small size circuit breaker according to claim 1, wherein:

the upper enclosure comprises a first transverse baffle wall, a first turning wall, a second turning wall and a second transverse baffle wall;

one end of the first transverse baffle wall is provided with a first turning wall;

the other end of the first transverse baffle wall is provided with a second turning wall, and the lower end of the second turning wall is provided with a second transverse baffle wall.

7. A case for a small size circuit breaker according to claim 1, wherein:

and the left surrounding baffle is provided with at least one lead channel.

8. A miniature circuit breaker, characterized by:

comprising a housing according to any one of claims 1-7.

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