Power connection structure of circuit breaker

Abstract

The invention discloses a power connection structure of a circuit breaker. The circuit breaker mainly solves the problem that after wiring of a traditional circuit breaker is completed, a wire section and a terminal metal part which are exposed on the side face of a circuit breaker shell are not effectively sealed. According to the power connection structure of the circuit breaker provided by the invention, the fixed power connection columns are arranged on the mounting plate, and bottom butt joint is realized by using the mounting grooves, so that all high-voltage power connection parts are accommodated in the circuit breaker shell or at hidden positions at the bottom, conductor exposure is greatly reduced, and accidental electric shock and short circuit risks are effectively prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit breakers, in particular to a power connection structure of a circuit breaker. BACKGROUND

[0002] As a key circuit protection device, circuit breakers are widely used in low-voltage power distribution systems, industrial control and domestic electrical fields. The core function of circuit breakers is to automatically cut off the current when an overload, short circuit or other fault occurs in the circuit, so as to protect the safety of the line and the electrical equipment. In the actual installation and wiring of circuit breakers, the reliability, safety and convenience of the incoming line method and wiring structure directly affect the stable operation of the entire electrical system and the safety of personnel operation.

[0003] In traditional circuit breakers, especially small circuit breakers or molded case circuit breakers, a common wiring design is the side incoming line method. In this method, the wiring terminals are usually arranged on the side of the circuit breaker housing, and the power supply line or load line is connected from the side and fixed on the terminal row during installation. This structure has several inherent defects: first, after wiring is completed, the exposed wire segment and terminal metal part on the side of the circuit breaker housing lack effective closure, which can easily cause electric shock or short circuit risk due to accidental touching, falling of metal foreign objects or intrusion of small animals, especially in a power distribution box with limited space and complex environment, the safety hazards are more prominent; second, the layout of the side wiring often interferes with the circuit breaker installation rail or adjacent electrical components, and the wiring is irregular, which not only affects the appearance, but also may damage the insulation layer due to excessive bending or stress of the wire. SUMMARY

[0004] In order to overcome the deficiencies of the background art, the present application provides a power connection structure of a circuit breaker, which mainly solves the problem that the exposed wire segment and terminal metal part on the side of the circuit breaker housing lack effective closure after wiring of the traditional circuit breaker is completed.

[0005] The technical scheme of the present application is, A power connection structure of a circuit breaker, comprising a circuit breaker housing and a mounting plate, the circuit breaker housing comprising a power connection sheet, further comprising a power connection column arranged on the mounting plate; a mounting slot arranged through the circuit breaker housing, the power connection column extending into the mounting slot; the power connection sheet and the power connection column are electrically connected and detachably connected.

[0006] the power connection sheet and the power connection column are installed together by a fastening screw.

[0007] the mounting slot is arranged through the circuit breaker housing in the height direction.

[0008] The circuit breaker shell is provided with side plates which are detachably mounted on the sub-shells, and a circuit board is arranged between the side plates and the sub-shells, and the circuit board is electrically connected with the power receiving pieces.

[0009] The circuit breaker further comprises power taking pieces which are connected with the power receiving pieces at one end and connected with the circuit board at the other end.

[0010] The power receiving pieces are arranged in the grooves on the power receiving pieces.

[0011] The circuit board is provided with power taking grooves, and the power taking pieces are arranged in the power taking grooves and electrically connected with the power taking grooves.

[0012] The side walls of the sub-shells are provided with guide grooves and grooves, the bottom of the side plates is slidably connected with the guide grooves, and the top of the side plates is provided with hooks which are matched with the grooves.

[0013] The circuit breaker of the application has the advantages that the fixed power receiving column is arranged on the mounting plate, the bottom is butt-jointed by using the mounting groove, all high-voltage power receiving parts are accommodated in the circuit breaker shell or hidden in the bottom, the conductor is greatly reduced, and the risk of accidental electric shock and short circuit is effectively prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an explosion schematic view of an embodiment of the application.

[0015] Figure 2 It is a three-dimensional schematic view of an embodiment of the application.

[0016] Figure 3 It is Figure 2 It is an enlarged schematic view of A in FIG. 4.

[0017] Figure 4 It is a partial explosion schematic view of an embodiment of the application. DETAILED DESCRIPTION

[0018] The application will be further described below with reference to the drawings. A circuit breaker comprises a circuit breaker shell 1 and a mounting plate 2. The circuit breaker shell comprises a power receiving piece 3 and a power receiving column 21 which is arranged on the mounting plate. A mounting groove 11 is arranged through the circuit breaker shell, and the power receiving column is arranged in the mounting groove. The power receiving piece is electrically connected with the power receiving column and detachably connected with the power receiving column.

[0019] The application provides a power connection structure of a circuit breaker, which mainly comprises a circuit breaker shell 1, a mounting plate 2, a power connection sheet 3, a power connection column 21 and a fastening screw 4. The power connection column 21 is pre-installed on the mounting plate 2, the lower end of the power connection column 21 is used for connecting an external cable (a through hole can be formed on the back of the mounting plate for power connection, and the wiring is hidden), and the mounting plate itself is not conductive. The bottom of the circuit breaker shell 1 is provided with a mounting groove 11 penetrating along the height direction thereof. During installation, the circuit breaker shell 1 is aligned with the power connection column 21 on the mounting plate 2, and the upper end of the power connection column 21 is inserted into the mounting groove 11.

[0020] When the power connection column 21 is inserted into position, the fastening screw 4 is used to pass through the hole on the power connection sheet 3 and is screwed into the threaded hole at the top end of the power connection column 21, so that the power connection sheet 3 and the power connection column 21 are tightly pressed together, and further, a plug can be added at the upper end of the screw to increase the sealing effect; mechanical fixation and electrical connection are realized. This connection mode is reliable and convenient to disassemble, and the power connection resistance needs to be provided with two sides, one end in and one end out, and the power connection sheet also has two sides.

[0021] As shown in Figure 3 and Figure 4 , in order to further realize modularization, the circuit breaker shell 1 can be assembled by a plurality of independent sub-shells 12 side by side. One side (or both sides) of the sub-shell 12 is provided with a detachable side plate 5, a plurality of hooks are arranged on one side plate so as to facilitate the fixation of a plurality of sub-shells. A circuit board 51 is mounted on the inner side of the side plate 5, and the circuit board 51 can carry electronic elements such as indicating circuit, trip controller or communication interface.

[0022] In order to realize power taking from the main circuit, a power taking sheet 6 is arranged. As shown in Figure 4 , one end of the power taking sheet 6 is inserted into the specially formed groove 31 on the power connection sheet 3, and electrical connection is realized by welding, riveting or pressing. The other end of the power taking sheet 6 is inserted into the power taking groove 52 arranged at the edge of the circuit board 51, and the power taking groove 52 has elastic conductive contact pieces to ensure the close contact with the power taking sheet 6, so as to reliably lead the power of the main circuit to the circuit board 51. The power taking sheet is in the shape of L as a whole.

[0023] As shown in Figure 4 , the mounting structure of the side plate 5 and the sub-shell 12 is that a longitudinal guide groove 121 and a transverse groove 122 at the upper part are formed on the side wall of the sub-shell 12. The bottom of the side plate 5 is provided with a protrusion (not separately marked in the figure) matched with the guide groove 121, and the top inner side is provided with elastic hooks 55. When the side plate 5 is installed, the protrusion at the bottom thereof is aligned with the guide groove 121, and the side plate 5 is pushed along the guide groove 121, at this time, the hooks 55 are in the groove 122, and the quick installation is completed.

[0024] The working process of the application is as follows: first, connect the external line to the electrical column 21. Then, align the mounting groove 11 at the bottom of the assembled circuit breaker shell 1 (including the internal electrical contact piece 3, the sub-shell 12, etc.) with the electrical column 21 and insert it. Use a screwdriver to tighten the fastening screw 4 to complete the main circuit connection.

[0025] In this embodiment, as shown in Figure 2 The electrical contact piece and the electrical column are connected by the fastening screw 4. The electrical contact piece and the electrical column are connected in a detachable manner (such as screw connection). During installation, the circuit breaker shell is simply pushed into the mounting groove with the electrical column aligned, and then the screw is tightened to complete the electrical connection and achieve "plug and play". When replacing or repairing the circuit breaker, the shell can be removed as a whole by loosening the screw, without the need to disconnect the external wire, greatly simplifying the operation process and shortening the power outage time.

[0026] In this embodiment, as shown in Figure 1 The mounting groove is arranged along the height direction of the circuit breaker shell. This facilitates the alignment and insertion of the electrical column from the bottom.

[0027] In this embodiment, as shown in Figure 3 The circuit breaker shell is provided with side plates 5 that are detachably installed with the sub-shells. The side plates are provided with line boards 51 between the sub-shells, and the line boards are electrically connected with the electrical contact pieces. The design of sub-shell parallel installation and detachable side plate with line boards makes the circuit breaker easy to modularize. The line board can be reliably powered from the main electrical contact piece through the power extraction piece, facilitating the integration of auxiliary functions (such as status indication, communication module, etc.), and the plug-in structure of the side plate facilitates the replacement and upgrade of the functional modules.

[0028] In this embodiment, as shown in Figure 4 It also includes a power extraction piece 6 connected to the electrical contact piece at one end and to the line board at the other end.

[0029] In this embodiment, the electrical contact piece is provided with a sink 31, and the power extraction piece at one end is arranged in the sink. The electrical contact piece and the electrical column are connected by screw compression, with small contact resistance and reliable connection. The power extraction piece is positioned and connected through the sink and the power extraction groove, ensuring the stability and accuracy of the internal electrical connection, and the overall structure layout is reasonable and compact.

[0030] In this embodiment, as shown in Figure 4 The line board is provided with a power extraction groove 52, and the power extraction piece at one end extends into the power extraction groove and is electrically connected with the power extraction groove.

[0031] In this embodiment, as shown in Figure 4As shown, the side walls of the sub-housing are provided with a guide groove 121 and a groove 122, the side plate bottom is in sliding fit with the guide groove, and the top is provided with a hook 55 matched with the groove.

[0032] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the 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 cannot be understood as a limitation on the present application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features are limited. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0034] The embodiments described with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation on the present application. The embodiments should not be considered as a limitation on the present application, but any improvement made on the basis of the spirit of the present application should be within the scope of protection of the present application.

Claims

1. A circuit breaker's connection structure, comprising a circuit breaker housing (1) and a mounting plate (2), wherein the circuit breaker housing includes a contact piece (3), characterized in that: Also includes A power connection post (21) is provided on the mounting plate; The mounting groove (11) is provided through the circuit breaker housing, and the power connection post extends into the mounting groove; The contact plate is electrically connected to the contact post and is detachably connected.

2. The power connection structure of a circuit breaker according to claim 1, characterized in that: The contact plate and the contact post are installed together by fastening screws (4).

3. The power connection structure of a circuit breaker according to claim 1, characterized in that: The mounting groove is provided through the circuit breaker housing along its height.

4. The power connection structure of a circuit breaker according to claim 1, characterized in that: The circuit breaker housing has a sub-housing (12) installed side by side, and also includes a side plate (5) that is detachably installed with the sub-housing. A circuit board (51) is provided between the side plate and the sub-housing, and the circuit board is electrically connected to the contact plate.

5. The power connection structure of a circuit breaker according to claim 4, characterized in that: It also includes a power-collecting plate (6), one end of which is connected to the power-receiving plate and the other end of which is connected to the circuit board.

6. The power connection structure of a circuit breaker according to claim 5, characterized in that: The receiving plate is provided with a groove (31), and the receiving plate at one end is located in the groove.

7. The power connection structure of a circuit breaker according to claim 5, characterized in that: The circuit board is provided with a power collection slot (52), and one end of the power collection piece extends into the power collection slot and is electrically connected to the power collection slot.

8. The power connection structure of a circuit breaker according to claim 4, characterized in that: The side walls of the sub-shell are provided with guide grooves (121) and grooves (122). The bottom of the side plate is slidably engaged with the guide groove, and the top is provided with a hook (55) that is adapted to the groove.

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