CN221841789U - A molded case circuit breaker - Google Patents

Abstract

The utility model discloses a molded case circuit breaker, which relates to the technical field of electrical equipment, comprising a circuit breaker bottom cover, wherein the inner bottom end of the circuit breaker bottom cover is fixedly connected with a mounting bracket, and the bottom end of the mounting bracket is fixedly connected with a mounting base; the top end of the circuit breaker bottom cover is fixedly connected with a circuit breaker top cover, and the inner side of the circuit breaker top cover is fixedly installed with a switch handle; the bottom end of the switch handle is fixedly connected with a magnetic conductive sheet, the inner side of the magnetic conductive sheet is fixedly connected with a limited compression spring, and the bottom end of the limited compression spring is fixedly connected with a fixed inner bracket; when the utility model is in use, a built-in micro switch is adopted to control the connection and disconnection of a circuit of the micro switch control, so that the internal circuit is processed at the first level through the micro switch, and the internal electromagnet that absorbs the arc is used to control the internal tension spring and spring after the electromagnet absorbs the arc, so as to realize the disconnection of the control circuit, and when the arc is not large enough, the circuit will not be disconnected, so that the processing efficiency and accuracy are improved, and the stability of use is guaranteed.

Description

A molded case circuit breaker

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to a molded case circuit breaker.

Background Art

A circuit breaker is a switch device that can close, carry and break the current under normal circuit conditions and close, carry and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. Low-voltage circuit breakers can be seen everywhere in electrical product exhibitions and electrical appliance markets, especially molded case circuit breakers are very popular.

The prior art discloses a molded case circuit breaker with publication number CN203367192U, which includes a base, an upper cover, a moving contact, a static contact, a tripping mechanism, an operating mechanism, an electromagnetic release, an arc extinguishing chamber and an arc striking plate, wherein an arc is generated at the point where the moving contact and the static contact move, and the arc needs to enter the arc extinguishing chamber to be extinguished.

However, there are still certain defects in the prior art. For example, a Chinese patent with publication number CN203367192U discloses a molded case circuit breaker, which includes a base, an upper cover, a moving contact, a static contact, a tripping mechanism, an operating mechanism, an electromagnetic tripper, an arc extinguishing chamber and an arc striking plate. An arc will be generated at the action point of the moving contact and the static contact, and the arc needs to enter the arc extinguishing chamber to be extinguished. However, during use, the arc striking efficiency of the circuit breaker with this structure is low, resulting in poor breaking capacity of the circuit breaker.

Utility Model Content

In order to solve the deficiencies mentioned in the above background technology, the purpose of the present utility model is to provide a molded case circuit breaker.

The purpose of the utility model can be achieved through the following technical solutions:

A molded case circuit breaker comprises a circuit breaker bottom cover, a mounting bracket is fixedly connected to the bottom end of the inner side of the circuit breaker bottom cover, and a mounting base is fixedly connected to the bottom end of the mounting bracket;

The top of the circuit breaker bottom cover is fixedly connected with the circuit breaker top cover, and the inner side of the circuit breaker top cover is fixedly installed with a switch handle;

The bottom end of the switch handle is fixedly connected to a magnetic conductive sheet, the inner side of the magnetic conductive sheet is fixedly connected to a limited compression spring, and the bottom end of the limited compression spring is fixedly connected to a fixed inner bracket;

The outer side of the circuit breaker bottom cover is fixedly connected with a side fixing frame, and the inner side of the circuit breaker bottom cover is fixedly installed with a contact head.

Furthermore, an auxiliary fixing groove is provided on the outer side of the mounting bracket.

Furthermore, three installation grooves are respectively provided on both sides of the top of the circuit breaker top cover, each installation groove has an installation screw hole, and a switch installation groove is provided on the top of the circuit breaker top cover.

Furthermore, the front end of the magnetic conductive sheet is slidably connected to a rotating conductive bracket, the rear end of the fixed inner bracket is fixedly connected to a module shell, the top of the module shell is fixedly connected to an electromagnet, and the rear end of the module shell is fixedly connected to a magnetic conductive plate.

Furthermore, a sliding bracket is fixedly connected to the inner side of the side fixing bracket, a protective support plate is provided at the front end of the side fixing bracket, and an inner groove is provided on the inner side of the sliding bracket.

Furthermore, an arc extinguishing chamber is installed at the top of the contact head, a control board is fixedly connected to the bottom of the inner side of the arc extinguishing chamber, and a micro switch is fixedly connected to the bottom of the control board.

Beneficial effects of the utility model:

The utility model adopts a built-in micro switch to control the connection and disconnection of the circuit, so that the internal circuit is processed by the micro switch, and the internal electromagnet absorbs the arc. After the electromagnet absorbs the arc, it controls the internal tension spring and the spring to realize the disconnection of the control circuit. When the arc is not large enough, it will not cause the disconnection of the circuit, thereby improving the processing efficiency and accuracy and ensuring the stability of use.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model is further described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic diagram of the bottom cover of the circuit breaker of the utility model;

Figure 3 is a schematic diagram of the top cover of the circuit breaker of the utility model;

Figure 4 is a schematic diagram of the switch handle of the utility model;

Figure 5 is a schematic diagram of the side fixing frame of the utility model;

FIG. 6 is a schematic diagram of a contact head of the present invention.

In the figure: 1. Circuit breaker bottom cover; 11. Mounting bracket; 12. Mounting base; 13. Auxiliary fixing groove; 2. Circuit breaker top cover; 21. Mounting groove; 22. Mounting screw hole; 23. Switch mounting groove; 3. Switch handle; 31. Magnetic plate; 32. Limiting compression spring; 33. Fixed inner bracket; 34. Rotating conduction bracket; 35. Module shell; 36. Electromagnet; 37. Magnetic plate; 4. Side fixing frame; 41. Sliding bracket; 42. Protective support plate; 43. Inner groove; 5. Contact head; 51. Arc extinguishing chamber; 52. Control panel; 53. Micro switch.

DETAILED DESCRIPTION

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 of 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.

In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

A molded case circuit breaker, as shown in Figure 1, includes a circuit breaker bottom cover 1, a circuit breaker top cover 2 is fixedly connected to the top of the circuit breaker bottom cover 1, a switch handle 3 is fixedly installed on the inner side of the circuit breaker top cover 2, a side fixing frame 4 is fixedly connected to the outer side of the circuit breaker bottom cover 1, and a contact head 5 is fixedly installed on the inner side of the circuit breaker bottom cover 1.

As shown in FIG. 2 , a mounting bracket 11 is fixedly connected to the bottom inner end of the circuit breaker bottom cover 1 , a mounting base 12 is fixedly connected to the bottom end of the mounting bracket 11 , and an auxiliary fixing groove 13 is provided on the outer side of the mounting bracket 11 .

The top cover 2 and the switch handle 3 of the circuit breaker are supported by the mounting bracket 11 and the mounting base 12 on the inner side of the circuit breaker bottom cover 1 , and the auxiliary fixing groove 13 on the inner side of the circuit breaker bottom cover 1 is used to assist in fixing the circuit breaker top cover 2 .

As shown in FIG. 3 , three mounting grooves 21 are respectively provided on both sides of the top of the circuit breaker top cover 2 , each mounting groove 21 has a mounting screw hole 22 therein, and a switch mounting groove 23 is provided at the top of the circuit breaker top cover 2 .

The installation is assisted by the installation groove 21 at the top of the circuit breaker top cover 2, so that the circuit breaker top cover 2 can be installed with screws through the installation screw holes 22 inside the installation groove 21 to achieve fixation with the circuit breaker bottom cover 1.

As shown in Figure 4, a magnetic conductive sheet 31 is fixedly connected to the bottom end of the switch handle 3, a limit compression spring 32 is fixedly connected to the inner side of the magnetic conductive sheet 31, a fixed inner bracket 33 is fixedly connected to the bottom end of the limit compression spring 32, a rotating conduction bracket 34 is slidably connected to the front end of the magnetic conductive sheet 31, a module shell 35 is fixedly connected to the rear end of the fixed inner bracket 33, an electromagnet 36 is fixedly connected to the top of the module shell 35, and a magnetic conductive plate 37 is fixedly connected to the rear end of the module shell 35.

The switch handle 3 is used to control the connection and disconnection of the entire switch handle 3, and the magnetic conductive sheet 31 at the bottom of the switch handle 3 is used for transmission, and the limit compression spring 32 at the rear end of the magnetic conductive sheet 31 assists in supporting, so as to control the connection and disconnection of the magnetic conductive sheet 31 installed on the top end.

The electromagnet 36 at the top of the internal module shell 35 is used to control the internal tension spring, so that the tension spring transmits the spring inside the electromagnet 36, so that the spring inside the electromagnet 36 can control the fixed inner bracket 33 through transmission, so that the fixed inner bracket 33 drives the limit compression spring 32, and the limit compression spring 32 controls the switch handle 3 to disconnect.

As shown in FIG. 5 , a sliding bracket 41 is fixedly connected to the inner side of the side fixing bracket 4 , a protective support plate 42 is provided at the front end of the side fixing bracket 4 , and an inner groove 43 is provided at the inner side of the sliding bracket 41 .

As shown in FIG. 6 , an arc extinguishing chamber 51 is installed at the top of the contact head 5 , a control board 52 is fixedly connected to the bottom of the inner side of the arc extinguishing chamber 51 , and a micro switch 53 is fixedly connected to the bottom of the control board 52 .

The on/off state of the circuit is controlled by the micro switch 53 at the bottom of the arc extinguishing chamber 51 to achieve effective protection of the circuit. When an abnormal situation such as overload or short circuit occurs in the circuit, the current sensing element inside the micro switch 53 can detect the abnormal current signal and quickly cut off the circuit through the control board 52 at the top to prevent accidents.

When in use, the contact head 5 and the magnetic conductive plate 37 are used to assist in the installation of the internal switch handle 3, so that the switch handle 3 and the contact head 5 can be correctly installed on the top of the circuit breaker bottom cover 1, so that the circuit breaker bottom cover 1 can maintain the stability of other equipment during use. The side fixing frame 4 on the outside of the circuit breaker bottom cover 1 is used to assist in installation. When installation is required, the side fixing frame 4 on the outside of the circuit breaker bottom cover 1 is used for installation to improve the practicality of the circuit breaker.

The micro switch 53 at the bottom of the arc extinguishing chamber 51 is used to assist in controlling the state of the circuit. Once an overload short circuit or the like occurs, the micro switch 53 controls the control board 52 to transmit a signal to allow the electromagnet in the electromagnet 36 to work, and the fixed inner bracket 33 is used to transmit the limit compression spring 32, so that the limit compression spring 32 controls the magnetic conductive sheet 31 to disconnect the circuit.

In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims (6)

1. The plastic-case circuit breaker comprises a circuit breaker bottom cover (1), and is characterized in that a mounting bracket (11) is fixedly connected to the bottom end of the inner side of the circuit breaker bottom cover (1), and a mounting base (12) is fixedly connected to the bottom end of the mounting bracket (11);

The top end of the circuit breaker bottom cover (1) is fixedly connected with a circuit breaker top cover (2), and the inner side of the circuit breaker top cover (2) is fixedly provided with a switch handle (3);

The bottom end of the switch handle (3) is fixedly connected with a magnetic conduction sheet (31), the inner side of the magnetic conduction sheet (31) is fixedly connected with a limit compression spring (32), and the bottom end of the limit compression spring (32) is fixedly connected with a fixed inner bracket (33);

The circuit breaker bottom cover (1) is fixedly connected with a side fixing frame (4) at the outer side, and a contact head (5) is fixedly arranged at the inner side of the circuit breaker bottom cover (1).

2. A molded case circuit breaker according to claim 1, characterized in that the outer side of the mounting bracket (11) is provided with an auxiliary fixing groove (13).

3. The molded case circuit breaker according to claim 1, wherein three mounting grooves (21) are respectively formed in two sides of the top end of the circuit breaker top cover (2), a mounting screw hole (22) is formed in each mounting groove (21), and a switch mounting groove (23) is formed in the top end of the circuit breaker top cover (2).

4. A molded case circuit breaker according to claim 1, wherein the front end of the magnetic conductive sheet (31) is slidably connected with a rotary conductive bracket (34), the rear end of the fixed inner bracket (33) is fixedly connected with a module case (35), the top end of the module case (35) is fixedly connected with an electromagnet (36), and the rear end of the module case (35) is fixedly connected with a magnetic conductive plate (37).

5. A molded case circuit breaker according to claim 1, wherein the inner side of the side fixing frame (4) is fixedly connected with a sliding bracket (41), the front end of the side fixing frame (4) is provided with a protection support plate (42), and the inner side of the sliding bracket (41) is provided with an inner groove (43).

6. A moulded case circuit breaker according to claim 1, characterized in that said contact (5)

An arc extinguishing chamber (51) is arranged at the top end, a control board (52) is fixedly connected at the bottom end of the inner side of the arc extinguishing chamber (51),

The bottom end of the control board (52) is fixedly connected with a micro switch (53).