CN219435784U

CN219435784U - Moving contact structure of universal circuit breaker

Info

Publication number: CN219435784U
Application number: CN202320387395.XU
Authority: CN
Inventors: 刘丰丰; 侯魁; 潘璇; 王�忠; 杜吟
Original assignee: Jiangsu Daquan Kaifan Switch Co ltd
Current assignee: Jiangsu Daquan Kaifan Switch Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-07-28
Anticipated expiration: 2033-03-06

Abstract

The utility model discloses a movable contact structure of an universal circuit breaker, which comprises a movable contact assembly, a base and a bottom plate, wherein the movable contact assembly is arranged in the base, a busbar penetrating hole is formed in the middle lower part of the rear plane of the bottom plate, the vertical end face of the movable contact assembly penetrates out of the busbar penetrating hole on the bottom plate, the vertical end face is parallel to the rear plane of the bottom plate, an outer busbar mounting hole perpendicular to the bottom surface of the bottom plate is formed in the vertical end face of the movable contact, and the problem that the occupied space is large and materials are wasted due to the fact that a bent busbar is required to be additionally arranged when the outer busbar is externally connected is solved, so that the design and the installation of the busbar in a power distribution cabinet are simplified, the bent busbar is saved, and the cost is reduced.

Description

Moving contact structure of universal circuit breaker

Technical Field

The utility model relates to the technical field of low-voltage electrical apparatus components and parts, in particular to a movable contact structure of a universal circuit breaker.

Background

The universal circuit breaker is used for distributing electric energy in a power distribution network, protecting circuits, power supply equipment and motors from damage caused by faults such as overload, undervoltage, short circuit, single-phase grounding and the like, and has complete protection function. The outlet line of the traditional universal circuit breaker is generally in a horizontal straight-out structure.

A novel stationary circuit breaker disclosed in patent document publication No. CN214588493U, for example, includes a stationary contact base plate assembly and a base assembly; the base assembly component comprises a base and a moving contact assembly component I, the moving contact assembly component I is provided with a moving contact welding component I, the moving contact welding component I is provided with a moving contact outgoing line row I, the moving contact outgoing line row I is provided with at least two groups of contact sheet components and a mutual inductor, a gap is arranged between every two adjacent groups of contact sheet components, and a sealing block is fixed in the gap to insulate the cavity.

The scheme has simple structure and meets the design requirements of most traditional electrical cabinets. However, due to the limitation of front and rear space, the electrical cabinet in the new energy industry needs to lead the incoming and outgoing lines of the internal circuit breaker to the upper part or the lower part of the circuit breaker, and needs to be realized by additionally installing a bent busbar or a bent busbar, so that the compact design requirement of the electrical cabinet is not met, the design and assembly of the busbar in the electrical cabinet are complex, and the material cost is increased.

Disclosure of Invention

Aiming at the problems of large occupied space and material waste caused by additionally installing a bent busbar when the movable contact outgoing line drainage straight-out structure is externally connected with an outer busbar in the prior art, the utility model provides a movable contact structure of a universal circuit breaker, and solves the problems.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a universal circuit breaker moving contact structure, includes moving contact subassembly, base, bottom plate, the moving contact subassembly is installed in the base, female row of having worn out the hole is opened to the lower part in the bottom plate back plane, the perpendicular terminal surface of moving contact subassembly wears out from the female row of wearing out the hole on the bottom plate, perpendicular terminal surface is on a parallel with the bottom plate back plane, it has the outer female row mounting hole of perpendicular to bottom plate back plane to open on the perpendicular terminal surface of moving contact subassembly.

Preferably, the moving contact assembly comprises a moving contact main body, a moving contact busbar and a nut box, wherein the moving contact busbar is L-shaped and comprises a vertical end face at the rear end part and a horizontal end face at the bottom, the vertical end face of the moving contact busbar penetrates out of a busbar penetrating hole on a bottom plate, a nut groove for accommodating an outer busbar mounting nut and preventing the nut from rotating is formed in the inner side of the vertical end face of the moving contact busbar, the nut box is fixed in front of the nut groove in the inner side of the vertical end face of the moving contact busbar and is fixed on the horizontal end face of the moving contact busbar, and the front part of the moving contact busbar is arranged on the moving contact main body.

Preferably, a nut box fixing hole is formed in the horizontal end face of the movable contact busbar.

Preferably, a busbar fixing hole matched with the movable contact busbar is formed in the bottom surface of the nut box.

Preferably, the front part of the nut box is provided with a half-open sleeve-shaped structure for engaging the nut, the half-open part faces the horizontal end face of the movable contact busbar, and the rear part is provided with a through hole for the screw to enter and exit.

Preferably, the semi-open sleeve-shaped structure is a sleeve-shaped structure for accommodating a hexagonal nut.

Preferably, the nut box is made of plastic.

Preferably, the inner dimension of the busbar through hole on the bottom plate is larger than the cross section dimension of the perpendicular end surface of the movable contact busbar parallel to the rear plane of the bottom plate.

Preferably, the nut box also follows the movable contact busbar to pass out from a busbar passing hole on the bottom plate.

Preferably, a moving contact main body mounting hole is formed in the front of the horizontal end face of the moving contact busbar, and the moving contact busbar is mounted on the moving contact main body through the moving contact main body mounting hole.

According to the movable contact structure of the universal circuit breaker, the movable contact busbar is arranged by the vertical contact end face through the straight-out type structure improvement, the movable contact end face can be tightly attached to the busbar in the power distribution cabinet to be arranged in a downward extending mode, the installation space of the outer busbar is saved, the design and the installation of the busbar in the power distribution cabinet are simplified, the bent busbar is saved, and the cost is reduced.

Drawings

FIG. 1 is a schematic perspective view of a moving contact assembly of the present utility model;

fig. 2 is a schematic rear perspective view of a circuit breaker employing the present utility model;

FIG. 3 is another perspective view of the movable contact assembly of the present utility model;

fig. 4 is a schematic perspective view of a movable contact busbar;

FIG. 5 is a schematic perspective view of the nut case;

FIG. 6 is a schematic perspective view of the back of the base plate;

FIG. 7 is a schematic illustration of the utility model applied with the outer busbar fully down;

FIG. 8 is a schematic illustration of the application of the present utility model with two side outer bus bars mounted horizontally;

the device comprises a 1-base, a 2-bottom plate, a 21-busbar penetrating hole, a 3-movable contact assembly, a 31-movable contact busbar, a 311-nut box fixing hole, a 312-nut groove, a 313-outer busbar mounting hole, a 314-movable contact main body mounting hole, a 32-nut box, a 321-busbar fixing hole, a 322-semi-open sleeve-shaped structure, a 33-movable contact main body, a 4-outer busbar and a 5-outer busbar mounting nut.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

The embodiment provides a technical scheme that: the utility model provides a universal circuit breaker moving contact structure, includes a moving contact subassembly 3, a base 1 and a bottom plate 2, moving contact subassembly 3 installs in base 1, female row's of having worn out hole 21 is opened to the lower part in the plane behind the bottom plate 2, female row's of having worn out hole is rectangular in this embodiment, of course also can be the other shapes of the perpendicular terminal surface complex of mother row with the moving contact, see the following expression, the perpendicular terminal surface of moving contact subassembly 3 wears out from female row's of hole 21 on the bottom plate 2, perpendicular terminal surface is parallel to the plane behind the bottom plate 2, open on the perpendicular terminal surface of moving contact subassembly 3 two outer female row's of perpendicular to the plane behind the bottom plate 2 mounting hole 313 of horizontal arrangement.

Each moving contact assembly 3 comprises a moving contact main body 33, a moving contact busbar 31 and a nut box 32, current enters the moving contact assembly 3 from a fixed contact and flows through the moving contact main body 33, the moving contact busbar 31 and flows out from the vertical end face of the moving contact busbar 31 from top to bottom, the moving contact busbar 31 is generally L-shaped and comprises a vertical end face of a rear end part and a horizontal end face of a bottom, the vertical end face of the moving contact busbar 31 penetrates out from a busbar penetrating hole 21 on a bottom plate 2, the vertical end face is an electric contact face for realizing connection with an outer busbar 4, a nut groove 312 for accommodating an outer busbar mounting nut 5 is formed in the inner side of the vertical end face of the moving contact busbar 31, the width of the nut groove just can place the outer busbar mounting nut in the groove and prevent the nut from rotating, the nut box 32 is fixed in front of the nut groove 312 in the inner side of the vertical end face of the moving contact busbar 31 and is fixed on the horizontal end face of the moving contact busbar 31, and the front part of the moving contact busbar 31 is mounted on the moving contact busbar 33.

The horizontal end surface of the movable contact busbar 31 is provided with a nut box fixing hole 311 in front of a nut groove 312 at the inner side of the vertical end surface, the nut box 32 is fixed by screws, the vertical end surface of the movable contact busbar 31 is provided with two outer busbar mounting holes 313 which are horizontally arranged and are perpendicular to the rear plane of the bottom plate 2, the outer busbar 4 is fixed by screws, and the front part of the horizontal end surface of the movable contact busbar 31 is also provided with two movable contact main body mounting holes 314, which are used for mounting the movable contact busbar 31 on the movable contact main body 33.

When the outer busbar 4 is installed, screws sequentially penetrate through holes in the outer busbar 4 and outer busbar installation holes 313 in the movable contact busbar 31 and are screwed into the outer busbar installation nuts 5, the outer busbar installation nuts 5 are clamped in the nut grooves 312, nut boxes 312 are arranged on the other side of the outer busbar installation nuts 5 to position the outer busbar installation nuts 5, busbar fixing holes 321 matched with the movable contact busbar 31 are formed in the bottom surface of the nut box 32, the nut box 32 can be made of plastic materials, the self-tapping screws can penetrate through the nut box fixing holes 311 in the movable contact busbar 31 to fix and fasten the nut box 32, two semi-open sleeve-shaped structures 322 for occluding the outer busbar installation nuts 5 are formed in the front of the nut box 32, the semi-open parts face the horizontal end faces of the movable contact busbar 31, and screw in and out through holes are reserved in the rear parts. The outer busbar mounting nut 5 in this embodiment uses a hexagonal nut, so the half-open sleeve-like structure 322 of the nut case 32 is a sleeve-like structure that accommodates the hexagonal nut. Of course, other suitable fasteners such as square nuts can be used for the outer busbar mounting nuts 5, and the shape of the half-open sleeve-shaped structure 322 of the nut box 32 can be correspondingly changed. The inner dimension of the busbar through hole 21 on the bottom plate 2 is larger than the cross-sectional dimension of the vertical end surface of the movable contact busbar 31 parallel to the rear plane of the bottom plate, and the nut box 32 also follows the movable contact busbar 31 to pass out of the busbar through hole 21 on the bottom plate 2.

The nut box 32 can also use rigid materials, the number of the nut box fixing holes 311 on the busbar fixing holes 321 and the movable contact busbar 31 is increased, and the busbar fixing holes 321 are arranged to be threaded holes, so that the nut groove 312 structure of the movable contact busbar 31 is omitted, and the requirement that the outer busbar mounting nuts 5 bear the fastening torque of the outer busbar mounting screws is met.

When in use, as shown in fig. 7 and 8, the outer busbar 4 can be wholly downward or the outer side is outward, the horizontal inner side is downward installed on the movable contact structure of the universal circuit breaker, in fact, the outer busbar 4 can be also upward installed, thereby achieving the technical effects of saving bending busbar and saving installation space of the outer busbar.

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.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a universal type circuit breaker moving contact structure, includes moving contact subassembly, base, bottom plate, the moving contact subassembly is installed in the base, the lower part is opened in the bottom plate back plane has female row to wear out the hole, its characterized in that: the movable contact assembly comprises a bottom plate, a movable contact assembly, a base plate, a main row and a main row, wherein the movable contact assembly is arranged on the bottom plate, the movable contact assembly is arranged on the movable contact assembly, and the movable contact assembly is arranged on the movable contact assembly.

2. The movable contact structure of a universal circuit breaker according to claim 1, wherein: the movable contact assembly comprises a movable contact main body, a movable contact busbar and a nut box, wherein the movable contact busbar is L-shaped and comprises a vertical end face of a rear end part and a horizontal end face of a bottom, the vertical end face of the movable contact busbar penetrates out of a busbar penetrating hole on a bottom plate, a nut groove for accommodating an outer busbar mounting nut and preventing the nut from rotating is formed in the inner side of the vertical end face of the movable contact busbar, the nut box is fixed in front of the nut groove in the inner side of the vertical end face of the movable contact busbar and is fixed on the horizontal end face of the movable contact busbar, and the front part of the movable contact busbar is mounted on the movable contact main body.

3. The movable contact structure of a universal circuit breaker according to claim 2, wherein: and a nut box fixing hole is formed in the horizontal end face of the movable contact busbar.

4. The movable contact structure of a universal circuit breaker according to claim 2, wherein: and a busbar fixing hole matched with the movable contact busbar is formed in the bottom surface of the nut box.

5. The movable contact structure of a universal circuit breaker according to claim 2, wherein: the front part of the nut box is provided with a half-open sleeve-shaped structure for occluding the nut, the half-open part faces the horizontal end face of the movable contact busbar, and the rear part is provided with a through hole for the screw to pass in and out.

6. The movable contact structure of a universal circuit breaker as recited in claim 5, wherein: the semi-open sleeve-shaped structure is a sleeve-shaped structure for accommodating the hexagonal nut.

7. The movable contact structure of a universal circuit breaker according to claim 2, wherein: the nut box is made of plastic materials.

8. The movable contact structure of a universal circuit breaker according to claim 2, wherein: the inner dimension of the busbar penetrating hole on the bottom plate is larger than the cross section dimension of the perpendicular end surface of the movable contact busbar parallel to the rear plane of the bottom plate.

9. The movable contact structure of a universal circuit breaker according to claim 2, wherein: the nut box also follows the movable contact busbar to pass through the busbar through hole on the bottom plate.

10. The movable contact structure of a universal circuit breaker according to claim 2, wherein: the front part of the horizontal end surface of the movable contact busbar is provided with a movable contact main body mounting hole, and the movable contact busbar is mounted on a movable contact main body through the movable contact main body mounting hole.