CN219553532U

CN219553532U - Plastic case circuit breaker with integrated contact support structure

Info

Publication number: CN219553532U
Application number: CN202223187425.7U
Authority: CN
Inventors: 吴磊; 周建平; 高柏勇
Original assignee: Gret Electric Co ltd
Current assignee: Gret Electric Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-08-18
Anticipated expiration: 2032-11-30

Abstract

A molded case circuit breaker with an integrated structure of a contact support. The problem of current moulded case circuit breaker adopts split type contact support for the product assembly difficulty is solved. The contact system comprises a plurality of movable contact pieces and static contact pieces which are arranged corresponding to the movable contact pieces, different movable contact pieces are arranged on a contact support, the movable contact pieces are provided with a first position where the movable contact pieces are driven by the contact support to move and are in contact with the static contact pieces and a second position where the movable contact pieces are separated from the static contact pieces, and the contact support is integrally formed and arranged in the shell in a rotating mode relative to the shell. The movable contact piece is arranged on the contact support and is driven to move by the contact support, and the contact support is of an integrated structure, so that the structure is simple, the movable contact piece can be integrally assembled, and the product is convenient to assemble. The utility model also has the advantages of reliable action, long service life and the like.

Description

Plastic case circuit breaker with integrated contact support structure

Technical Field

The utility model relates to a molded case circuit breaker, in particular to a molded case circuit breaker with an integrated structure of a contact support.

Background

The molded case circuit breaker is also called a device type circuit breaker, all parts are sealed in a plastic shell, and an auxiliary contact, an undervoltage release, a shunt release and the like are modularized. The molded case circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a tripping mechanism, an overload protection system, a short-circuit protection system and the like, wherein a moving contact of the contact system can be operated to be communicated with or disconnected from a fixed contact through the operating mechanism. The moving contact is usually arranged on the contact support, the existing contact support is usually processed by plastics such as nylon, the contact support is easy to deform by heating to influence the rotation and other performances, the contact support is usually split, the structure is complex, the product is difficult to assemble due to limited internal space of the product molded case circuit breaker, the moving contact is usually provided with a spring after being arranged on the contact support to ensure the overrun of the moving contact, but the spring is easy to shift during assembly, so that the product is difficult to assemble.

Disclosure of Invention

In order to solve the problem that the existing molded case circuit breaker adopts a split contact support and the product is difficult to assemble in the background technology, the utility model provides the molded case circuit breaker with the integrated structure of the contact support.

The technical scheme of the utility model is as follows: the utility model provides a moulded case circuit breaker of contact support integral type structure, includes casing, tripping device, contact system and explosion chamber, contact system include a plurality of movable contact pieces and with the movable contact piece correspond the static contact piece that sets up, the movable contact piece of difference all locates on the contact support, the movable contact piece have by the contact support drive its motion with the first position of static contact piece contact and with the second position of static contact piece separation, contact support integrated into one piece just locate in the casing and the relative casing rotate the setting.

As a further improvement of the utility model, the contact support is provided with a support shaft part and a cover shell part, different movable contact pieces are correspondingly arranged in the cover shell part, and an elastic piece for providing the elasticity of the movable contact pieces is arranged in the cover shell part.

As a further improvement of the utility model, the housing part comprises a baffle, the baffle is mutually matched to form a containing cavity, the movable contact piece is arranged in the containing cavity and extends out of the housing part, and the baffle is provided with a notch part which is convenient for the movable contact piece to extend out of the housing part and a guide part which is convenient for the movable contact piece to move.

As a further improvement of the utility model, two baffles are connected through the connecting plates, the connecting plates are arranged in a step shape, the baffles are provided with mounting grooves, the movable contact pieces are arranged in the mounting grooves through rotating shafts and can rotate relative to the baffles, and the elastic pieces are torsion springs.

As a further improvement of the utility model, the support shaft part is provided with a limiting plate, the shell is provided with a support plate, the support plate is provided with a U-shaped groove, and the support shaft part is arranged in the U-shaped groove and is matched with the support plate for limiting the contact support by the limiting plate.

As a further development of the utility model, the contact carrier is integrally formed from DMC, SMC or BMC.

As a further improvement of the utility model, the arc-extinguishing chamber comprises a plurality of arc-extinguishing grid sheets, and the bottom arc-extinguishing grid sheet is provided with a guide plate which is obliquely arranged.

As a further improvement of the utility model, the static contact is fixed on the shell through the mounting screw, the bottom of the shell is provided with the groove, the mounting screw is inserted into the shell from the groove at the bottom of the shell for fixing the static contact, and the outer side of the mounting screw is provided with the bottom plate.

As a further improvement of the utility model, the tripping mechanism comprises a traction rod, an oil cup and a tripping piece, wherein the tripping piece is arranged on the tripping frame, a wire is wound around the oil cup, and the oil cup is matched with the tripping piece to drive the traction rod to act and trip.

As a further improvement of the utility model, the tripping piece is hinged on the tripping frame, the tripping piece is provided with a tripping foot for pushing the traction rod, and the tripping foot is provided with an arc-shaped part.

The movable contact piece is arranged on the contact support and is driven to move by the contact support, and the contact support is of an integrated structure, so that the structure is simple, the movable contact piece can be integrally assembled, and the product is convenient to assemble. The utility model also has the advantages of reliable action, long service life and the like.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of an exploded structure according to an embodiment of the present utility model.

Fig. 3 is a schematic view of the structure in the housing according to the embodiment of the present utility model.

Fig. 4 is a schematic diagram of the explosive structure of fig. 3.

Fig. 5 is a schematic view of the trip mechanism of fig. 4.

Fig. 6 is a schematic view of the structure of the contact holder in fig. 5.

Fig. 7 is a schematic structural view of the arc extinguishing chamber in fig. 3.

Fig. 8 is a schematic structural diagram of the movable contact in fig. 5.

In the figure, 1, a shell; 11. a support plate; 12. a U-shaped groove; 13. a groove; 14. a bottom plate; 2. an operating mechanism; 3. a trip mechanism; 31. a traction rod; 32. an oil cup; 33. removing the fastener; 34. a trip frame; 35. a wire; 36. trip feet; 361. an arc-shaped portion; 4. a contact system; 41. a movable contact; 42. a stationary contact; 421. installing a screw; 5. an arc extinguishing chamber; 51. arc extinguishing grid plates; 511. a guide plate; 6. a contact holder; 61. a spindle part; 62. a cover part; 63. an elastic member; 64. a baffle; 641. a notch portion; 642. a guide part; 643. a mounting groove; 644. a rotating shaft; 65. a receiving chamber; 66. a connecting plate; 67. and a limiting plate.

Detailed Description

Embodiments of the utility model are further described below with reference to the accompanying drawings:

the molded case circuit breaker with an integrated structure of a contact support is shown by combining fig. 1 with fig. 2-8, and comprises a shell 1, an operating mechanism 2, a tripping mechanism 3, a contact system 4 and an arc extinguishing chamber 5, wherein the contact system 4 comprises a plurality of movable contact pieces 41 and static contact pieces 42 which are arranged corresponding to the movable contact pieces 41, different movable contact pieces 41 are arranged on the contact support 6, the movable contact pieces 41 are provided with a first position where the movable contact pieces 41 are driven by the contact support 6 to move and are contacted with the static contact pieces 42 and a second position where the movable contact pieces 41 are separated from the static contact pieces 42, and the contact support 6 is integrally formed and arranged in the shell 1 and is arranged in a rotating mode relative to the shell 1. The movable contact piece is arranged on the contact support and is driven to move by the contact support, and the contact support is of an integrated structure, so that the structure is simple, the movable contact piece can be integrally assembled, and the product is convenient to assemble. The utility model also has the advantages of reliable action, long service life and the like. Specifically, the operating mechanism is connected with the contact support to drive the contact support to move, and the operating mechanism can be realized by adopting the existing technology and is not described herein.

The contact support 6 is provided with a support shaft 61 and a cover 62, different movable contacts 41 are correspondingly arranged in the cover 62, and the cover 62 is internally provided with an elastic member 63 for providing elastic force of the movable contacts. The setting of branch shaft portion is convenient for the installation of contact support, and the setting of cover shell portion is convenient for the assembly of movable contact, is convenient for movable contact action.

The cover part 62 includes a baffle plate 64, the baffle plate 64 is matched with each other to form a containing cavity 65, the movable contact 41 is arranged in the containing cavity 65 and extends out of the cover part 62, and the baffle plate 64 is provided with a notch 641 which facilitates the extension of the movable contact 41 from the cover part 62 and a guide part 642 which facilitates the movement of the movable contact 41. The structure ensures that the movable contact piece moves stably and reliably, and simultaneously has the functions of limiting and protecting the movable contact piece, and has simple structure and convenient assembly.

The two baffles 64 are connected through the connecting plate 66, the connecting plate 66 is arranged in a step shape, the baffle 64 is provided with a mounting groove 643, the movable contact 41 is arranged in the mounting groove 643 through a rotating shaft 644 and can rotate relative to the baffle 64, and the elastic piece 63 is a torsion spring. The baffle can be formed into a whole by the arrangement of the connecting plate, and meanwhile, the baffle can be limited left and right and is stepped, so that the material is convenient to steal, and the production cost is reduced. The setting of mounting groove is convenient for the setting of torsional spring and pivot, avoids the spring to shift when installation and use, influences the product precompression.

The support shaft part 61 is provided with a limiting plate 67, the shell 1 is provided with a support plate 11, the support plate 11 is provided with a U-shaped groove 12, and the support shaft part 61 is arranged in the U-shaped groove 12 and is matched with the support plate 11 by the limiting plate 67 to limit the contact support 6. The structure is convenient for product installation, and the contact support acts stably and reliably.

The contact support 6 is formed by integrating DMC (Dough molding compounds) and SMC (SMC is a thermosetting plastic), and the main raw materials comprise GF (chopped glass fiber), MD (filler) and various auxiliary agents or BMC (Bulk molding compounds). The product has the advantages of simple structure, convenient processing, good thermal stability, difficult deformation, high strength, corrosion resistance, long service life and high production efficiency.

The arc-extinguishing chamber 5 comprises a plurality of arc-extinguishing grid sheets 51, and a guide plate 511 which is obliquely arranged is arranged on the arc-extinguishing grid sheet 51 at the bottommost part. The structure is convenient for striking an arc, and has simple structure and good striking effect.

The static contact piece 42 is fixed on the shell 1 through a mounting screw 421, a groove 13 is formed in the bottom of the shell 1, the mounting screw 421 is inserted into the shell 1 from the groove 13 at the bottom of the shell 1 and used for fixing the static contact piece 42, and a bottom plate 14 is arranged on the outer side of the mounting screw 421. The space of product has been rationally utilized in the setting of recess, the installation of the installation screw of being convenient for. The groove can be sheltered from in the setting of bottom plate, and product wholeness is good, and the security is high.

The tripping mechanism 3 comprises a traction rod 31, an oil cup 32 and a tripping element 33, wherein the tripping element 33 is arranged on a tripping frame 34, a lead 35 is wound on the outer ring of the oil cup 32, and the oil cup 32 is matched with the tripping element 33 to drive the traction rod 31 to trip. Specifically, the trip element 33 is hinged to the trip frame 34, the trip element 33 is provided with a trip foot 36 for pushing the traction rod 31, and the trip foot 36 is provided with an arc-shaped portion 361. Short-circuit protection and overload protection are realized through the oil cup and the tripping part, when in short circuit, the uppermost cover of the oil cup provides suction force to attract the tripping part to rotate, and when in overload, the tripping foot drives the traction rod to move and trip, and when in overload, the iron core in the oil cup moves, the iron core can float up after overload, the suction force is increased, and the tripping part is driven to rotate to a certain extent, and the tripping foot drives the traction rod to move and trip.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. A molded case circuit breaker with a contact support integrated structure comprises a shell (1), a tripping mechanism (3), a contact system (4) and an arc extinguishing chamber (5), wherein the contact system (4) comprises a plurality of movable contact pieces (41) and static contact pieces (42) which are arranged corresponding to the movable contact pieces (41), and the molded case circuit breaker is characterized in that different movable contact pieces (41) are arranged on a contact support (6), the movable contact pieces (41) are provided with a first position where the contact support (6) drives the movable contact pieces to move and contact with the static contact pieces (42) and a second position where the contact support is separated from the static contact pieces (42), and the contact support (6) is integrally formed and arranged in the shell (1) in a rotating mode relative to the shell (1).

2. The molded case circuit breaker with the integrated structure of the contact support according to claim 1, characterized in that the contact support (6) is provided with a support shaft portion (61) and a housing portion (62), different movable contacts (41) are correspondingly arranged in the housing portion (62), and an elastic piece (63) for providing elastic force of the movable contacts is arranged in the housing portion (62).

3. The molded case circuit breaker with the integrated structure of the contact support according to claim 2, wherein the housing part (62) comprises a baffle plate (64), the baffle plate (64) is mutually matched to form a containing cavity (65), the movable contact piece (41) is arranged in the containing cavity (65) and extends out of the housing part (62), and the baffle plate (64) is provided with a notch part (641) which facilitates the extension of the movable contact piece (41) from the housing part (62) and a guide part (642) which facilitates the movement of the movable contact piece (41).

4. A molded case circuit breaker with an integrated structure of contact support according to claim 3, characterized in that the two baffles (64) are connected through the connecting plate (66), the connecting plate (66) is arranged in a step shape, the baffle (64) is provided with a mounting groove (643), the movable contact (41) is arranged in the mounting groove (643) through a rotating shaft (644) and can rotate relative to the baffle (64), and the elastic piece (63) is a torsion spring.

5. The molded case circuit breaker with the integrated structure of the contact bracket according to claim 2, characterized in that the support shaft part (61) is provided with a limiting plate (67), the shell (1) is provided with a support plate (11), the support plate (11) is provided with a U-shaped groove (12), and the support shaft part (61) is arranged in the U-shaped groove (12) and is matched with the support plate (11) by the limiting plate (67) for limiting the contact bracket (6).

6. A molded case circuit breaker with integrated contact carrier structure according to claim 1, characterized in that the contact carrier (6) is integrally molded from DMC, SMC or BMC.

7. The molded case circuit breaker with the integrated structure of the contact bracket according to claim 1, wherein the arc extinguishing chamber (5) comprises a plurality of arc extinguishing grid sheets (51), and a guide plate (511) which is obliquely arranged is arranged on the arc extinguishing grid sheet (51) at the bottommost part.

8. The molded case circuit breaker with the integrated structure of the contact support according to claim 1, characterized in that the static contact (42) is fixed on the housing (1) through a mounting screw (421), a groove (13) is formed in the bottom of the housing (1), the mounting screw (421) is inserted into the housing (1) from the groove (13) at the bottom of the housing (1) for fixing the static contact (42), and a bottom plate (14) is arranged on the outer side of the mounting screw (421).

9. The molded case circuit breaker with the integrated structure of the contact support according to claim 1, characterized in that the tripping mechanism (3) comprises a traction rod (31), an oil cup (32) and a tripping piece (33), the tripping piece (33) is arranged on a tripping frame (34), a lead (35) is surrounded outside the oil cup (32), and the oil cup (32) and the tripping piece (33) are matched to drive the traction rod (31) to act and trip.

10. The molded case circuit breaker with the integrated structure of the contact bracket according to claim 9, wherein the trip piece (33) is hinged on the trip frame (34), a trip foot (36) for pushing the traction rod (31) is arranged on the trip piece (33), and an arc-shaped part (361) is arranged on the trip foot (36).