CN210403627U

CN210403627U - Plastic case circuit breaker

Info

Publication number: CN210403627U
Application number: CN201921634271.7U
Authority: CN
Inventors: 潘锦强; 廖水国; 陈拓; 刘伦
Original assignee: Zhejiang People Ele Appliance Co ltd
Current assignee: Zhejiang People Ele Appliance Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-04-24
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a plastic shell breaker, the first limit structure is composed of a limit projection arranged on a wiring end and a first limit groove arranged on a mounting groove, the second limit structure is composed of a second limit groove arranged on a boss of the mounting groove, when a static contact is mounted, only the contact end needs to be limited and mounted in the second limit groove, and the limit projection of the wiring end is embedded in the first limit groove, the design has the advantages that the wiring end and the contact end of the static contact can be respectively limited and mounted by the matching of the first limit groove and the limit projection, and the second limit groove and the contact end, so that the static contact can be quickly positioned on a base, thereby the shaking and deviation of the static contact on the base can be limited, the mounting position of the static contact is ensured to be accurate, and finally the static contact is fixed in the mounting groove by a fixing structure, the matching and fixing are reliable, the installation stability is good, guarantees the accuracy and the reliability of moving, static contact cooperation contact, promotes product performance.

Description

Plastic case circuit breaker

Technical Field

The utility model relates to a circuit breaker field, concretely relates to moulded case circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The molded case circuit breaker is one of circuit breakers, and can automatically cut off current after the current exceeds a trip setting, the molded case refers to a plastic insulator serving as a shell of the device and used for isolating conductors and grounding metal parts, binding posts are arranged at two ends of the molded case circuit breaker, and fixed contacts are used for connecting the binding posts and moving contacts, so that the circuit of the whole circuit breaker is realized.

As shown in figure 1, a base 01 of an existing circuit breaker is provided with a plurality of mounting grooves 02, static contacts are mounted in the mounting grooves 02, one ends of the static contacts are fixed at the port positions of the mounting grooves 02, and the other ends of the static contacts extend towards one side of a movable contact and are in matched contact or separated with the movable contact.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the static contact among the prior art and taking place easily when pedestal mounting and rocking, and installation stability is poor, can lead to static contact and moving contact failure's problem to provide a static contact and be difficult for rocking on the base, installation stability is good, guarantees static contact and moving contact cooperation contact reliable and stable moulded case circuit breaker.

The utility model provides a moulded case circuit breaker, include:

the base comprises a mounting groove which extends along the length direction of the base;

the static contact is arranged in the mounting groove and comprises a wiring end fixed at one end of the mounting groove and a contact end which is in matched contact with or separated from the moving contact;

a first limiting structure is arranged between the wiring end and the base, the first limiting structure comprises at least one limiting bulge arranged on the wiring end and at least one first limiting groove correspondingly arranged in the mounting groove, and the limiting bulge is embedded in the first limiting groove and fixed through a fixing structure;

the contact end with be provided with second limit structure between the base, second limit structure is including setting up in the mounting groove and butt in the boss of contact end below to and the shaping is in just be fit for the installation on the boss the second spacing groove of contact end.

In the above molded case circuit breaker, the first limiting groove has a groove structure matched with the limiting protrusion, and is close to the side wall of one side or two sides of the mounting groove, and the limiting protrusion is vertically formed on one side or two sides of the bottom surface of the wiring terminal.

In the molded case circuit breaker, one side wall of the first limit groove is provided with an arc-shaped opening, and an arc-shaped protrusion matched with the arc-shaped opening is formed on the outer side wall of the limit protrusion.

In the molded case circuit breaker, the fixing structure includes threaded holes correspondingly formed in the first limiting groove and the limiting protrusion, and a fastening member fixed in the threaded holes.

In the above molded case circuit breaker, the second limiting groove is a strip-shaped through groove extending in the same direction as the mounting groove, and the contact end is arranged in the strip-shaped through groove in a penetrating manner.

In the molded case circuit breaker, the fixed contact is in a Z-shaped structure, and the contact end of the fixed contact is bent into a straight shape by the wiring end to be integrally formed.

In the molded case circuit breaker, the fixed contact is of a Z-shaped structure, and includes a flat plate portion formed by bending the wiring terminal, and a slot structure arranged on the flat plate portion, the contact end integrally formed on the inner wall of one end of the slot structure is arranged in the slot structure, and the boss can be accommodated in the slot structure.

In the above-mentioned moulded case circuit breaker, the mounting groove is including being fit for holding the wiring area of wiring end, and be fit for holding the explosion chamber district of contact end, the wiring area with be formed with the installation step between the explosion chamber district, install in the explosion chamber district and surround the explosion chamber of contact end.

In the molded case circuit breaker, the side walls of the two sides of the mounting groove are provided with two slots corresponding to the mounting step, and an arc isolating plate which is abutted against the top of the mounting step is inserted between the two slots.

In the molded case circuit breaker, a wire tightening device connected with the wiring terminal is installed in the wiring port area, and the wire tightening device comprises a bolt part and a gasket assembly, wherein the bolt part is arranged in a connecting hole formed in the wiring terminal and the wiring port area in a penetrating mode, and the gasket assembly is arranged between the bolt part and the wiring terminal.

Compared with the prior art, the technical scheme of the utility model have the following advantage:

1. the utility model provides a moulded case circuit breaker, first limit structure comprises the spacing arch of setting at the wiring end and the first spacing groove of setting in the mounting groove, second limit structure comprises the second spacing groove of setting on the boss of mounting groove, when installing the static contact, only need to spacing install the contact end in the second spacing groove, and the spacing arch gomphosis of wiring end in the first spacing groove, the benefit of design like this lies in, through first spacing groove and spacing arch, and the cooperation of second spacing groove and contact end play spacing installation effect respectively to wiring end and the contact end of static contact, so that the static contact can be fixed a position on the base fast, thereby can restrict its emergence rocking and off normal on the base, guarantee that the mounted position of static contact is accurate, finally through fixed structure fix the static contact in the mounting groove can, cooperation is fixed reliably, the installation stability is good, guarantees the accuracy and the reliability of moving, static contact cooperation contact, promotes product performance.

2. The utility model provides a moulded case circuit breaker, static contact are Z shape structure, constitute by wiring end, flat plate portion and contact end, are equipped with slotted hole structure on the flat plate portion, and a contact end body coupling is in slotted hole structure one end edge, this kind of structure setting, the boss can hold in the slotted hole structure, when the electric current switches on, the electric current of wiring end can follow flat plate portion both sides side flow direction contact end, with being divided into the undercurrent of heavy current to reach the effect that reduces the whole temperature rise of static contact.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below.

Fig. 1 is a top view of a base of a prior art circuit breaker;

fig. 2 is a top view of the static contact of the present invention mounted on the base;

fig. 3 is a top view of another static contact according to the present invention mounted on a base;

fig. 4 is a sectional view of the molded case circuit breaker of the present invention;

FIG. 5 is an enlarged view of a portion of the base shown in FIG. 4;

fig. 6 is a schematic structural view of the static contact shown in fig. 2;

fig. 7 is a schematic structural view of the static contact shown in fig. 3;

description of reference numerals:

1-a base; 11-mounting grooves; 12-a wire interface region; 13-an arc extinguishing chamber zone; 14-mounting a step; 15-an arc extinguishing chamber; 16-a slot; 17-an arc barrier; 18-a take-up device; 2, static contact; 21-a terminal; 22-contact end; 23-a flat plate portion; 24-slot configuration; 3-a first limit structure; 31-a limit bump; 32-a first limit groove; 33-arc-shaped opening; 34-an arc-shaped bulge; 35-a threaded hole; 4-a second limiting structure; 41-boss; 42-second limit groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the utility model provides a moulded case circuit breaker as shown in fig. 2-7, include:

the base 1 comprises a mounting groove 11 which extends along the length direction;

the static contact 2 is arranged in the mounting groove 11 and comprises a wiring terminal 21 fixed at one end of the mounting groove 11 and a contact terminal 22 which is in contact with or separated from the movable contact in a matching way;

a first limiting structure 3 is arranged between the terminal 21 and the base 1, the first limiting structure 3 comprises two limiting protrusions 31 arranged on the terminal 21 and two first limiting grooves 32 correspondingly arranged in the mounting groove 11, and the limiting protrusions 31 are embedded in the first limiting grooves 32 and fixed through a fixing structure;

the contact end 22 and be provided with second limit structure 4 between the base 1, second limit structure 4 is including setting up in mounting groove 11 and butt in the boss 41 of contact end 22 below to and the shaping is in on the boss 41 and be fit for the installation the second spacing groove 42 of contact end 22.

The above embodiment is the core technical solution of this embodiment, when the static contact 2 is installed, only the contact end 22 needs to be installed in the second limiting groove 42 in a limiting manner, and the limiting protrusion 31 of the terminal 21 is embedded in the first limiting groove 32, so that the design has the advantages that the terminal 21 and the contact end 22 of the static contact 2 can be respectively installed in a limiting manner by the cooperation of the first limiting groove 32 and the limiting protrusion 31, and the second limiting groove 42 and the contact end 22, so that the static contact 2 can be quickly positioned on the base 1, thereby preventing the static contact 2 from shaking and deviating on the base 1, ensuring the accurate installation position of the static contact 2, and finally, the static contact 2 can be fixed in the installation groove 11 by the fixing structure, so that the installation is reliable in a matching manner, has good installation stability, and ensures that the moving contact 2 can be fixed in the installation groove 11 The accuracy and the reliability of the static contact matching contact improve the service performance of the product.

As shown in fig. 5 and 7, the first limiting groove 32 has a groove structure matched with the limiting protrusion 31, and is disposed near the sidewalls of the two sides of the mounting groove 11, the limiting protrusion 31 is vertically formed on the two sides of the bottom surface of the terminal 21, the terminal 21 of the static contact 2 is reliably positioned by matching the two limiting protrusions 31 and the two first limiting grooves 32, the mounting direction of the static contact 2 is also defined, and the mounting efficiency is improved, in this embodiment, the limiting protrusion 31 is formed by stamping the static contact 2 by a stamping device.

In order to avoid the static contact 2 from displacing when the base 1 is installed, an arc-shaped opening 33 is formed in a side wall of one side of the first limiting groove 32, an arc-shaped protrusion 34 matched with the arc-shaped opening 33 is formed in an outer side wall of the limiting protrusion 31, and mutual blocking effects can be achieved through the abutting matching of the arc-shaped opening 33 and the arc-shaped protrusion 34, so that the limiting effect between the limiting protrusion 31 and the first limiting groove 32 is further enhanced, and the matching connection is reliable.

As a preferred embodiment, the fixing structure includes threaded holes 35 correspondingly disposed on the first limiting groove 32 and the limiting protrusion 31, and a fastening member fixed in the threaded holes 35, and the fastening member passes through the threaded holes 35 to apply a fastening force to the static contact 2, so that the static contact 2 is fastened on the base 1, which is convenient to mount and reliable in fixation.

In order to prevent the contact end 22 from shaking, as shown in fig. 2-5, the second limiting groove 42 is a strip-shaped through groove extending in the same direction as the mounting groove 11, the contact end 22 is arranged in the strip-shaped through groove in a penetrating manner, the contact end 22 is supported by the boss, the mounting position and direction of the contact end 22 are limited by the strip-shaped through groove, the contact end 22 can be effectively prevented from shaking in the base 1, the structure is simple, and the mounting stability is good.

The structure of the stationary contact 2 is described in detail below with reference to fig. 3 and 7:

the static contact 2 is in a Z-shaped structure, the contact end 22 of the static contact is integrally formed by bending the wiring end 21 into a straight shape, the forming and the manufacturing are simple and convenient, the production material is saved, and the production cost is reduced.

As a deformable embodiment of the stationary contact 2, as shown in fig. 2 and 6, the stationary contact 2 has a Z-shaped structure, it comprises a flat plate part 23 formed by bending the terminal 21 and a slotted hole structure 24 arranged on the flat plate part 23, the contact end 22 integrally formed on the inner wall of one end of the slotted hole structure is arranged in the slotted hole structure, the contact end 22 is provided with a stationary contact, the slot structure 24 is similar to a Y-shaped structure, the boss 41 can be accommodated in the slot structure 24, when the current is conducted, the current of the terminal 21 will flow from both sides of the flat plate portion 23 to the contact end 22, so as to divide the large current into small currents, thereby achieving the effect of reducing the overall temperature rise of the static contact 2, meanwhile, the area of the static contact 2 is increased to increase the current carrying capacity, so that the rated current of the circuit breaker can be improved.

In this embodiment, as shown in fig. 3 to 5, the mounting groove 11 includes a terminal area 12 adapted to accommodate the terminal 21, and an arc extinguishing chamber area 13 adapted to accommodate the contact end 22, a mounting step 14 is formed between the terminal area 12 and the arc extinguishing chamber area 13 to just meet the mounting position requirement of the structure of the stationary contact 2, an arc extinguishing chamber 15 surrounding the contact end 22 is installed in the arc extinguishing chamber area 13, an arc extinguishing function is performed on an arc generated by the stationary contact and the moving contact through the arc extinguishing chamber 15, a wire tightening device 18 connected to the terminal 21 is installed in the terminal area 12, the wire tightening device 18 includes a bolt member inserted into a connecting hole formed correspondingly between the terminal 21 and the terminal area 12, and a gasket assembly disposed between the bolt member and the terminal 21, the gasket assembly is a spring gasket and a flat gasket inserted into the bolt member, the gasket component can eliminate the damage of the bolt component on the surface of the terminal 21 when the bolt component is disassembled and screwed, increase the stress surface of the bolt component and play a certain amount of buffer protection when the bolt component is stressed.

As a preferred embodiment, two slots 16 are arranged on the side walls of the two sides of the mounting groove 11 corresponding to the mounting step 14, an arc isolating plate 17 abutting against the top of the mounting step 14 is inserted between the two slots 16, and the arc isolating plate 17 plays an arc isolating role, thereby preventing the phenomenon of electric arc channeling outwards and improving the use safety of the product.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A molded case circuit breaker, comprising:

the base (1) comprises a mounting groove (11) extending along the length direction of the base;

static contact (2), install in mounting groove (11), it is including being fixed in wiring end (21) of mounting groove (11) one end to and contact end (22) with moving contact cooperation contact or separation, its characterized in that:

a first limiting structure (3) is arranged between the wiring terminal (21) and the base (1), the first limiting structure (3) comprises at least one limiting protrusion (31) arranged on the wiring terminal (21) and at least one first limiting groove (32) correspondingly arranged in the mounting groove (11), and the limiting protrusion (31) is embedded in the first limiting groove (32) and fixed through a fixing structure;

the contact terminal (22) and be provided with second limit structure (4) between base (1), second limit structure (4) are including setting up in mounting groove (11) and butt in boss (41) of contact terminal (22) below to and the shaping is in on boss (41) and be fit for the installation second spacing groove (42) of contact terminal (22).

2. The molded case circuit breaker according to claim 1, wherein the first position-limiting groove (32) has a groove structure matching with the position-limiting protrusion (31) and is disposed near one or both side walls of the mounting groove (11), and the position-limiting protrusion (31) is vertically formed on one or both sides of the bottom surface of the terminal (21).

3. The molded case circuit breaker according to claim 2, wherein an arc-shaped opening (33) is formed in a side wall of the first position-limiting groove (32), and an arc-shaped protrusion (34) engaged with the arc-shaped opening (33) is formed in an outer side wall of the position-limiting protrusion (31).

4. The molded case circuit breaker according to claim 3, wherein the fixing structure comprises a screw hole (35) correspondingly disposed on the first position-limiting groove (32) and the position-limiting protrusion (31), and a fastener fixed in the screw hole (35).

5. The molded case circuit breaker according to any of claims 1-4, wherein the second limiting groove (42) is a strip-shaped through groove extending in the same direction as the mounting groove (11), and the contact end (22) is inserted into the strip-shaped through groove.

6. A molded case circuit breaker according to claim 5 wherein said stationary contact (2) is Z-shaped and has a contact end (22) bent from said terminal (21) into a flat shape and integrally formed therewith.

7. A molded case circuit breaker according to claim 5, wherein the stationary contact (2) is a Z-shaped structure, and includes a flat plate portion (23) formed by bending the terminal (21), and a slot structure (24) disposed on the flat plate portion (23), the slot structure (24) has the contact end (22) integrally formed on an inner wall of one end of the slot structure (24), and the boss (41) is receivable in the slot structure (24).

8. A molded case circuit breaker according to claim 1, characterized in that the mounting slot (11) comprises a terminal area (12) adapted to receive the terminal (21) and an arc extinguishing chamber area (13) adapted to receive the contact end (22), a mounting step (14) being formed between the terminal area (12) and the arc extinguishing chamber area (13), an arc extinguishing chamber (15) surrounding the contact end (22) being mounted in the arc extinguishing chamber area (13).

9. A molded case circuit breaker according to claim 8 wherein two slots (16) are formed in the side walls of the mounting groove (11) corresponding to the mounting step (14), and an arc barrier (17) abutting against the top of the mounting step (14) is inserted between the two slots (16).

10. A molded case circuit breaker according to claim 8, wherein a wire tightening device (18) connected to the terminal (21) is installed in the terminal area (12), and the wire tightening device (18) includes a bolt member inserted into a connecting hole formed in the terminal (21) corresponding to the terminal area (12), and a spacer assembly disposed between the bolt member and the terminal (21).