Adjustable bimetallic strip structure of circuit breaker

Abstract

The utility model discloses an adjustable bimetallic strip structure of breaker, including shell, bimetallic strip body and arc striking support, the arc striking support includes the run-on plate and the connecting plate, the run-on plate and the connecting plate are integrated connection, and the bend portion is provided between the run-on plate and the connecting plate, the shell is equipped with the adjusting screw in the threaded manner, and the adjusting screw is connected with the connecting plate in the threaded manner. The end of the adjusting screw is attached to the bottom of the connecting plate, the bimetallic strip body is fixedly connected to the side, close to the bent portion, of the bottom of the connecting plate, and the bottom of the bimetallic strip body is fixedly connected with a flexible connector. By adopting the structure, a connecting sheet is replaced by flexible connection, the electric connection between the bimetallic strip and the wiring terminal is realized by adopting the shortest distance, the component structure is optimized, the structure is simplified, and the occupied space is small; and based on the flexible connection of the bimetallic strip and the wiring terminal, the adjusting screw is rotated, so that the connecting plate slightly rotates by taking the bending part as a circle center.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an adjustable bimetallic strip structure of a circuit breaker. Background Art

[0002] Bimetallic strips are a composite material composed of two or more metals or other materials with suitable properties. Bimetallic strips are also called thermal bimetallic strips. Since the thermal expansion coefficients of the component layers are different, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so the entire bimetallic strip body will bend toward the passive layer, and the curvature of the composite material will change, resulting in deformation. The working principle of thermal overload protection of circuit breakers is to use the heat bending characteristics of bimetallic strips to make them bend and press on the trip button when overloaded, and the trip button structure will move to cut off the circuit.

[0003] In circuit breakers, existing bimetallic strip structures such as Figure 3 As shown, it mainly includes a bracket, a bimetallic body and a connecting piece that can be deformed to a certain extent, wherein the structure of the connecting piece is lengthy and complicated, occupies a large space, the structure is not simple enough, and the position of the bimetallic body is fixed, so the existing structure is not convenient for adjusting the gap between the bimetallic strip and the jump buckle. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and proposes an adjustable bimetallic strip structure for a circuit breaker to solve the problems of lengthy and complicated structure of the connecting strip and the inconvenience in adjusting the gap between the bimetallic strip and the tripping buckle.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An adjustable bimetal structure of a circuit breaker comprises a shell, a bimetal body and an arc-striking bracket, the arc-striking bracket comprises an arc-striking plate and a connecting plate, the arc-striking plate and the connecting plate are integrally connected, and a bending portion is provided between the arc-striking plate and the connecting plate, an adjusting screw is threadedly mounted on the shell, an end of the adjusting screw is fitted to the bottom of the connecting plate, the bimetal body is fixedly connected to one side of the bottom of the connecting plate close to the bending portion, and a soft connection is fixedly connected to the bottom of the bimetal body.

[0007] Preferably, a holder is fixedly installed inside the shell, the arc-starting plate is placed on the holder, and a movable space for the connecting plate to move is provided inside the shell.

[0008] Preferably, a mounting hole is provided on the housing, a threaded sleeve is fixedly installed in the mounting hole, and the adjusting screw is threadedly connected in the threaded sleeve.

[0009] Preferably, the top of the adjusting screw is provided with an arc-shaped top, the arc-shaped top is attached to the left side of the bottom of the connecting plate, and the bottom of the adjusting screw is provided with a hexagonal hole.

[0010] In summary, the beneficial effects of the utility model are as follows: the adjustable bimetallic strip structure of the circuit breaker provided by the utility model adopts a soft connection to replace the complex connecting strip, adopts the shortest distance to realize the electrical connection between the bimetallic strip and the terminal, optimizes the component structure, has a simple structure and occupies a small space; and based on the soft connection between the bimetallic strip and the terminal, by turning the adjusting screw, the connecting plate can rotate slightly with the bending part as the center, thereby being able to adjust the gap between the bimetallic strip and the trip buckle, making the overall practicality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a basic structural schematic diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the bimetallic body of the utility model;

[0013] Figure 3 It is a schematic diagram of the existing bimetallic strip body structure.

[0014] Figure numerals: 1. Shell; 2. Bimetallic body; 3. Arc-striking bracket; 301. Arc-striking plate; 302. Bending portion; 303. Connecting plate; 4. Adjusting screw; 5. Flexible connection; 6. Clamping seat; 7. Movable space; 8. Mounting hole; 9. Threaded sleeve; 10. Arc top; 11. Hexagon socket hole; 12. Terminal block. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] like Figure 1 - Figure 2 As shown, the utility model provides an adjustable bimetal structure of a circuit breaker, comprising a shell 1, a bimetal body 2 and an arc-striking bracket 3, the arc-striking bracket 3 comprising an arc-striking plate 301 and a connecting plate 303, the arc-striking plate 301 and the connecting plate 303 are integrally connected, and a bending portion 302 is provided between the arc-striking plate 301 and the connecting plate 303, an adjusting screw 4 is threadedly mounted on the shell 1, the end of the adjusting screw 4 is fitted to the bottom of the connecting plate 303, the bimetal body 2 is fixedly connected to the bottom of the connecting plate 303 near the side of the bending portion 302, and a soft connection 5 is fixedly connected to the bottom of the bimetal body 2. The arc-striking bracket 3 is installed in the outer shell 1. The arc-striking bracket 3 is used to connect the bimetallic strip and the arc extinguishing grid to play the role of arc-striking. A bending portion 302 is arranged between the arc-striking plate 301 and the connecting plate 303. Since it is a metal sheet structure, the bending portion 302 can have a certain degree of deformation ability. The bimetallic strip and the terminal 12 are connected by a soft connection 5. The soft connection 5 is a flexible conductor. Therefore, when the adjusting screw 4 is rotated, the connecting plate 303 is slightly rotated with the bending portion as the center, so that the gap between the bimetallic strip and the jump buckle can be adjusted.

[0018] A holder 6 is fixedly installed inside the housing 1, and the arc-striking plate 301 is placed on the holder 6. An activity space 7 for the movement of the connecting plate 303 is provided inside the housing 1. The holder 6 is used to cooperate with a section of the arc-striking plate 301 of the arc-striking bracket 3 for installation, so that a section of the arc-striking plate 301 is not easy to move after installation, and the activity space 7 is used as a reserved space for the adjustment movement of the connecting plate.

[0019] The housing 1 is provided with a mounting hole 8, in which a threaded sleeve 9 is fixedly installed, and the adjusting screw 4 is threadedly connected in the threaded sleeve 9. The mounting hole 8 is provided to hide the adjusting screw 4, and when adjustment is required, the adjusting screw 4 can be rotated by a tool, and the threaded sleeve 9 cooperates with the adjusting screw 4, so that the adjusting screw 4 can be threadedly moved.

[0020] The top of the adjusting screw 4 is provided with an arc top 10, which fits on the left side of the bottom of the connecting plate 303, and the bottom of the adjusting screw 4 is provided with a hexagonal hole 11. The arc top 10 can be placed on the connecting plate 303, and the arc top can better push the connecting plate 303. The hexagonal hole 11 can be easily rotated by using a tool, and the adjusting screw 4 can be hidden in the mounting hole 8.

[0021] Working principle: The bimetallic strip structure is used for small circuit breakers, wherein the arc-striking bracket 3 is installed in the housing 1. The arc-striking bracket 3 is used to connect the bimetallic strip and the arc-extinguishing grid to play the role of arc-striking. A bending portion 302 is provided between the arc-striking plate 301 and the connecting plate 303. Since it is a metal sheet structure, the bending portion 302 can have a certain degree of deformation ability, and the bimetallic strip is connected to the terminal 12 by a flexible connection 5. The flexible connection 5 is a flexible conductor. Therefore, when the adjusting screw 4 is rotated, the adjusting screw 4 can be rotated by a tool, and the threaded sleeve 9 cooperates with the adjusting screw 4 so that the adjusting screw 4 can move threadably, so that the connecting plate 303 rotates slightly with the bending portion as the center, thereby adjusting the gap between the bimetallic strip and the jump buckle. The holder 6 is used to cooperate with a section of the arc-striking plate 301 of the arc-striking bracket 3 for installation, so that a section of the arc-striking plate 301 is not easy to move after installation, and the activity space 7 is used as a reserved space for the adjustment activity of the connecting plate.

[0022] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An adjustable bimetallic strip structure of a circuit breaker, comprising a housing (1), a bimetallic strip body (2) and an arc-striking support (3), wherein the arc-striking support (3) comprises an arc-striking plate (301) and a connecting plate (303), wherein the arc-striking plate (301) and the connecting plate (303) are integrally connected, and a bending portion (302) is provided between the arc-striking plate (301) and the connecting plate (303), wherein: An adjusting screw (4) is threadedly mounted on the housing (1), the end of the adjusting screw (4) being fitted to the bottom of the connecting plate (303), the bimetallic body (2) being fixedly connected to a side of the bottom of the connecting plate (303) close to the bent portion (302), and a flexible connection (5) being fixedly connected to the bottom of the bimetallic body (2).

2. The adjustable bimetallic strip structure of a circuit breaker according to claim 1, characterized in that: A holder (6) is fixedly mounted inside the housing (1), the arc-starting plate (301) is placed on the holder (6), and a movable space (7) for the connection plate (303) to move is provided inside the housing (1).

3. The adjustable bimetallic strip structure of a circuit breaker according to claim 1, characterized in that: The housing (1) is provided with a mounting hole (8), a threaded sleeve (9) is fixedly mounted in the mounting hole (8), and the adjustment screw (4) is threadedly connected in the threaded sleeve (9).

4. The adjustable bimetallic strip structure of a circuit breaker according to claim 1, characterized in that: The top of the adjusting screw (4) is provided with an arc-shaped top (10), and the arc-shaped top (10) is attached to the left side of the bottom of the connecting plate (303). The bottom of the adjusting screw (4) is provided with a hexagonal hole (11).

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