Miniature circuit breaker N-pole linkage mechanism

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a miniature circuit breaker N-pole linkage mechanism, which comprises a circuit breaker, a bimetallic strip, a magnetic coil and a trigger mechanism, an arc extinguish chamber is arranged on the upper portion of one side in the circuit breaker, and the bimetallic strip is arranged on the circuit breaker close to the lower portion of the arc extinguish chamber. An upper wiring terminal is arranged at the upper end of the interior of the circuit breaker, a lower wiring terminal is arranged at the lower end of the interior of the circuit breaker, a magnetic coil is arranged on the side, away from an arc extinguish chamber, of the interior of the circuit breaker, a trigger mechanism is connected to the position, close to the lower portion of the magnetic coil, of the interior of the circuit breaker, and the magnetic coil is composed of a shell, a movable iron core, a spring and a coil. The outer part of the shell is connected with a coil, the inner part of the shell is connected with a movable iron core, the outer part of the movable iron core is provided with a spring, the trigger mechanism consists of an operating handle, a pull ring and a central lever, the lower part of the operating handle is connected with the pull ring, and the lower part of the pull ring is connected with the central lever.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an N-pole linkage mechanism of a small circuit breaker. Background Art

[0002] The complex internal structure of a small circuit breaker can easily cause the N-pole linkage mechanism to get stuck, affecting its power-off and recovery efficiency.

[0003] Therefore, it is necessary to design a small circuit breaker N-pole linkage mechanism to solve the problems in the above-mentioned background technology. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art and proposes a small circuit breaker N-pole linkage mechanism.

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

[0006] A small circuit breaker N-pole linkage mechanism comprises a circuit breaker, a bimetallic strip, a magnetic coil and a trigger mechanism, wherein an arc extinguishing chamber is arranged at the upper part of one side inside the circuit breaker, a bimetallic strip is arranged near the bottom of the arc extinguishing chamber, an upper wiring terminal is arranged at the upper end inside the circuit breaker, a lower wiring terminal is arranged at the lower end inside the circuit breaker, a magnetic coil is arranged at one side of the circuit breaker away from the arc extinguishing chamber, and a trigger mechanism is connected to the bottom of the circuit breaker near the magnetic coil;

[0007] The magnetic coil is composed of a shell, a movable iron core, a spring and a coil, and the coil is connected to the outside of the shell, the movable iron core is connected to the inside of the shell, and the spring is arranged outside the movable iron core;

[0008] The trigger mechanism is composed of an operating handle, a pull ring and a central lever, and the lower part of the operating handle is connected to the pull ring, and the lower part of the pull ring is connected to the central lever.

[0009] As a preferred solution of the utility model, the movable iron core is sleeved in the shell, the spring is sleeved on the lower part of the outer part of the movable iron core, and the coil is wound on the outer part of the shell.

[0010] As a preferred solution of the utility model, the middle of the operating handle and the central lever are both provided with a connecting groove which is sleeved with the circuit breaker.

[0011] As a preferred solution of the utility model, the pull ring and the operating handle and the central lever are connected by sleeve connection.

[0012] As a preferred solution of the utility model, a hook is provided on the central lever near the bottom of the bimetallic strip.

[0013] To sum up, the technical effects and advantages of the utility model are as follows: when the N-pole linkage mechanism of the small circuit breaker is short-circuited, the magnetic field of the coil becomes stronger, the movable iron core is pulled downward by the magnetic attraction force, and the lower end of the movable iron core obtains a downward force, thereby pressing the central lever downward, so that the pull ring connected to one end of the central lever is loosened, and the lower end of the pull ring is driven upward by the central lever, thereby driving the operating handle to jump down; when the circuit is overloaded, the metal sheet with fast expansion at the upper end of the bimetallic strip is heated and bent toward the metal sheet with slow expansion at the lower end, thereby pressing the hook on the central lever downward, thereby causing the central lever to rotate, so that the pull ring connected to one end of the central lever is loosened, and the lower end of the pull ring is driven upward by the central lever, thereby driving the operating handle to jump down, and the trigger mechanism has a larger movable space, which reduces the occurrence of jamming during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of the utility model Figure 1 ;

[0015] Figure 2 The overall structure of the utility model Figure 2 ;

[0016] Figure 3 This is a structural diagram of the magnetic coil of the utility model.

[0017] In the figure: 1. Circuit breaker; 2. Arc extinguishing chamber; 3. Bimetallic strip; 4. Upper terminal; 5. Magnetic coil; 501. Housing; 502. Movable iron core; 503. Spring; 504. Coil; 6. Trigger mechanism; 601. Operating handle; 602. Pull ring; 603. Central lever; 7. Lower terminal. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-Figure 3A small circuit breaker N-pole linkage mechanism includes a circuit breaker 1, a bimetallic strip 3, a magnetic coil 5 and a trigger mechanism 6. An arc extinguishing chamber 2 is provided at the upper part of one side of the circuit breaker 1. The circuit breaker 1 is provided with a bimetallic strip 3 near the bottom of the arc extinguishing chamber 2. An upper terminal 4 is provided at the upper end of the circuit breaker 1. A lower terminal 7 is provided at the lower end of the circuit breaker 1. A magnetic coil 5 is provided on the side of the circuit breaker 1 away from the arc extinguishing chamber 2. A trigger mechanism 6 is connected to the circuit breaker 1 near the bottom of the magnetic coil 5. The trigger mechanism 6; the magnetic coil 5 is composed of a shell 501, a movable iron core 502, a spring 503 and a coil 504, and the coil 504 is connected to the outside of the shell 501, the movable iron core 502 is connected to the inside of the shell 501, and a spring 503 is provided on the outside of the movable iron core 502; the trigger mechanism 6 is composed of an operating handle 601, a pull ring 602 and a central lever 603, and the lower part of the operating handle 601 is connected to the pull ring 602, and the lower part of the pull ring 602 is connected to the central lever 603.

[0020] Reference Figure 1 , Figure 2 and Figure 3 The complex internal structure of the small circuit breaker can easily cause the N-pole linkage mechanism to get stuck, affecting its power-off and recovery efficiency. The movable iron core 502 is sleeved in the shell 501, and the spring 503 is sleeved on the lower part of the outer surface of the movable iron core 502. The coil 504 is wound around the outer surface of the shell 501. When a short circuit occurs, the magnetic field of the coil 504 becomes stronger, and the movable iron core 502 is pulled downward by the magnetic attraction force. The lower end of the movable iron core 502 receives a downward force, thereby pressing the central lever 603 downward, so that the pull ring 602 connected to one end of the central lever 603 is relaxed, and the lower end of the pull ring 602 is driven upward by the central lever 603, thereby driving the operating handle 601 to jump down.

[0021] Reference Figure 1 , Figure 2 and Figure 3 The operating handle 601 and the central lever 603 are both provided with connection grooves for sleeve connection with the circuit breaker 1 in the middle, and the pull ring 602 is connected to the operating handle 601 and the central lever 603 through sleeve connection. The central lever 603 is provided with a hook near the bottom of the bimetallic strip 3. When the circuit is overloaded, the metal sheet with fast expansion at the upper end of the bimetallic strip 3 is heated and bent toward the metal sheet with slow expansion at the lower end, thereby pressing down the hook on the central lever 603, so that the central lever 603 rotates, so that the pull ring 602 connected to one end of the central lever 603 is loosened, and the lower end of the pull ring 602 is driven upward by the central lever 603, thereby driving the operating handle 601 to jump down, and the trigger mechanism 6 has a large movable space, which reduces the occurrence of jams during operation.

[0022] Working principle: The movable iron core 502 of the N-pole linkage mechanism of the small circuit breaker is sleeved in the housing 501, the spring 503 is sleeved on the lower part of the outer part of the movable iron core 502, and the coil 504 is wound on the outer part of the housing 501. When short-circuited, the magnetic field of the coil 504 becomes stronger, and the movable iron core 502 is pulled down by the magnetic attraction force. The lower end of the movable iron core 502 is forced downward, thereby pressing the central lever 603 downward, so that the pull ring 602 connected to one end of the central lever 603 is relaxed, and the lower end of the pull ring 602 is driven upward by the central lever 603, thereby driving the operating handle 601 to jump down. The operating handle 601 and the central lever 603 are both provided with a circuit breaker in the middle. The connecting groove of the device 1 is sleeved, and the pull ring 602 and the operating handle 601 and the central lever 603 are sleeved and connected. The central lever 603 is provided with a hook near the bottom of the bimetallic strip 3. When the circuit is overloaded, the metal sheet with fast expansion at the upper end of the bimetallic strip 3 is heated and bent toward the metal sheet with slow expansion at the lower end, thereby pressing down the hook on the central lever 603, so that the central lever 603 rotates, so that the pull ring 602 connected to one end of the central lever 603 is loosened, and the lower end of the pull ring 602 is driven upward by the central lever 603, thereby driving the operating handle 601 to jump down, and the trigger mechanism 6 has a larger movable space, which reduces the occurrence of jamming during operation.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small circuit breaker N-pole linkage mechanism, comprising a circuit breaker (1), a bimetallic strip (3), a magnetic coil (5) and a trigger mechanism (6), characterized in that: An arc extinguishing chamber (2) is provided at the upper part of one side inside the circuit breaker (1), a bimetallic strip (3) is provided near the bottom of the arc extinguishing chamber (2) of the circuit breaker (1), an upper wiring terminal (4) is provided at the upper end inside the circuit breaker (1), a lower wiring terminal (7) is provided at the lower end inside the circuit breaker (1), a magnetic coil (5) is provided at the side of the circuit breaker (1) away from the arc extinguishing chamber (2), and a trigger mechanism (6) is connected near the bottom of the magnetic coil (5) inside the circuit breaker (1); The magnetic coil (5) is composed of a shell (501), a movable iron core (502), a spring (503) and a coil (504); the coil (504) is connected to the outside of the shell (501), the movable iron core (502) is connected to the inside of the shell (501), and the spring (503) is provided on the outside of the movable iron core (502); The trigger mechanism (6) is composed of an operating handle (601), a pull ring (602) and a central lever (603), wherein the lower portion of the operating handle (601) is connected to the pull ring (602), and the lower portion of the pull ring (602) is connected to the central lever (603).

2. A small circuit breaker N-pole linkage mechanism according to claim 1, characterized in that: The movable iron core (502) is sleeved in the housing (501), the spring (503) is sleeved at the lower part of the outside of the movable iron core (502), and the coil (504) is wound around the outside of the housing (501).

3. The N-pole linkage mechanism of a miniature circuit breaker according to claim 1, characterized in that: The operating handle (601) and the central lever (603) are both provided with connection grooves in the middle thereof for sleeve connection with the circuit breaker (1).

4. The N-pole linkage mechanism of a miniature circuit breaker according to claim 1, characterized in that: The pull ring (602), the operating handle (601) and the central lever (603) are connected via a sleeve connection.

5. The N-pole linkage mechanism of a miniature circuit breaker according to claim 1, characterized in that: The central lever (603) is provided with a hook near the bottom of the bimetallic strip (3).

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