A current-limiting circuit breaker with anti-shock performance

Abstract

The application discloses a current-limiting circuit breaker with anti-seismic performance, which comprises a shell base and an upper cover, the shell base is provided with a thermal tripping mechanism composed of a tripping mechanism and a bimetallic strip, the current-limiting circuit breaker further comprises a thermal tripping pull rod, the upper cover is provided with a sliding rail, the thermal tripping pull rod is in sliding connection with the sliding rail, the upper cover is buckled with the shell base, the thermal tripping pull rod is arranged between the tripping mechanism and the bimetallic strip, one end of the thermal tripping pull rod is connected with the bimetallic strip, and the other end is arranged in a set distance close to the tripping mechanism, in a normal state, the thermal tripping pull rod and the tripping mechanism of the circuit breaker do not contact, when the bimetallic strip is heated and deformed, the other end of the thermal tripping pull rod touches the tripping mechanism, and power-off tripping is realized. The current-limiting circuit breaker with anti-seismic performance has the advantages of simple structure, strong anti-seismic performance and the ability of reducing the phenomenon of false tripping caused by the vibration conduction of the tripping pull rod to the tripping mechanism of the circuit breaker.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker, in particular to a current limiting type circuit breaker with anti-vibration performance. BACKGROUND

[0002] The hot-trip current limiting type circuit breaker generally uses the thermal deformation of the bimetallic memory element to pull the tripping device of the circuit breaker to trip, and the pull rod between the bimetallic strip and the tripping mechanism of the circuit breaker is generally in a free connection structure. When external vibration force is generated, the hot-trip pull rod also vibrates, which is easy to cause false tripping. SUMMARY

[0003] The present application aims to provide a current limiting type circuit breaker with anti-vibration performance, which has simple structure, strong anti-vibration performance and can reduce false tripping.

[0004] To achieve the above-mentioned purpose, the present application provides the following scheme:

[0005] A current limiting type circuit breaker with anti-vibration performance, comprising a shell base and an upper cover, the shell base is provided with a hot-trip mechanism composed of a tripping mechanism and a bimetallic strip, characterized in that the current limiting type circuit breaker further comprises a hot-trip pull rod,

[0006] The upper cover is provided with a sliding rail, the hot-trip pull rod is in sliding connection with the sliding rail, the upper cover is in buckling connection with the shell base, the hot-trip pull rod is arranged between the tripping mechanism and the bimetallic strip, one end of the hot-trip pull rod is connected with the bimetallic strip, and the other end is arranged in a set distance A close to the tripping mechanism, when the bimetallic strip is deformed by heating, the other end of the hot-trip pull rod touches the tripping mechanism, and power-off tripping is realized.

[0007] Optionally, one end of the hot-trip pull rod is provided with a slot opening, the slot opening is used for clamping the bimetallic strip, and when the upper cover is in buckling connection with the shell base, the bimetallic strip is inserted into the slot opening.

[0008] Optionally, the upper part of the hot-trip pull rod is provided with a sliding connecting piece, the sliding connecting piece is in hanging and sliding connection with the sliding rail, and the lower part of the hot-trip pull rod is provided with the slot opening.

[0009] Optionally, the other end of the hot-trip pull rod is provided with a tripping hook, and the tripping hook is used for pulling the tripping mechanism.

[0010] Optionally, the slot opening comprises a square opening and a triangular opening in communication, and one corner of the triangular opening is in communication with the square opening.

[0011] Optionally, the sliding rail comprises an upper sliding rail and a lower sliding rail, the sliding connector is in sliding connection with the upper sliding rail, the lower sliding rail is in sliding connection with the bottom of the thermal tripping pull rod, and the lower sliding rail is arranged at an end away from the slot opening and used for limiting the thermal tripping pull rod.

[0012] According to the specific embodiments of the present application, the following technical effects are achieved: the current limiting circuit breaker with the anti-shock performance provided by the present application is provided with a thermal tripping pull rod for pulling the tripping mechanism to trip off when the bimetallic strip is deformed, the thermal tripping pull rod is arranged on the upper cover of the circuit breaker, and the other end of the thermal tripping pull rod is arranged close to the tripping mechanism at a set distance A and is limited by the sliding rail; in the normal state, the thermal tripping pull rod and the tripping mechanism of the circuit breaker do not contact each other, and when the circuit breaker is shaken, the shaking force cannot be transmitted to the tripping mechanism of the circuit breaker through the thermal tripping pull rod, thereby avoiding the false tripping phenomenon caused by the vibration of the circuit breaker; the bimetallic strip is connected to one end of the thermal tripping pull rod through the slot opening; in the normal state, the bimetallic strip is not deformed, and the thermal tripping pull rod is not moved; when the bimetallic strip is deformed, the bimetallic strip drives the thermal tripping pull rod to slide along the sliding rail, the other end of the thermal tripping pull rod pulls the tripping mechanism, the tripping mechanism trips off, and the overheat protection of the circuit breaker is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0014] Figure 1 It is a shell base structure diagram of the current limiting circuit breaker with the anti-shock performance of the present application.

[0015] Figure 2 It is an upper cover structure diagram of the current limiting circuit breaker with the anti-shock performance of the present application.

[0016] Figure 3 It is a structure diagram of the thermal tripping pull rod of the present application.

[0017] Figure 4 It is a cooperation structure diagram of the thermal tripping pull rod and the thermal tripping mechanism of the present application.

[0018] The drawings show that: 1, upper cover; 2, tripping mechanism; 3, bimetallic strip; 4, thermal tripping pull rod; 5, sliding rail; 6, shell base; 7, slot opening; 8, sliding connector; 9, tripping hook. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0020] The present application aims to provide a current-limiting circuit breaker with anti-shock performance, which has simple structure, strong anti-shock ability and can reduce the phenomenon of false tripping.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0022] As shown in the drawings, Figures 1-2 The present application provides a current-limiting circuit breaker with anti-shock performance, which comprises a shell base 6 and an upper cover 1, the shell base 6 is provided with a thermal tripping mechanism composed of a tripping mechanism 2 and a bimetallic strip 3, characterized in that the current-limiting circuit breaker further comprises a thermal tripping pull rod 4,

[0023] The upper cover 1 is provided with a sliding rail 5, the thermal tripping pull rod 4 is in sliding connection with the sliding rail 5, the upper cover 1 is buckled with the shell base 6, the thermal tripping pull rod 4 is arranged between the tripping mechanism 2 and the bimetallic strip 3, one end of the thermal tripping pull rod 4 is connected with the bimetallic strip 3, and the other end is arranged close to the tripping mechanism 2 with a set distance A, in the normal state, the other end of the thermal tripping pull rod 4 does not contact the tripping mechanism 2, and a set distance A is maintained between them; when the bimetallic strip 3 is heated and deformed, the bimetallic strip 3 drives the thermal tripping pull rod 4 to slide along the sliding rail 5, the other end of the thermal tripping pull rod 4 gradually approaches and triggers the tripping mechanism 2, and power-off tripping is realized.

[0024] Wherein, one end of the thermal tripping pull rod 4 is provided with a slot opening 7, the slot opening 7 is used for clamping the bimetallic strip 3, when the upper cover 1 is buckled with the shell base 6, the bimetallic strip 3 is inserted into the slot opening 7, and connection is realized in a nearly cross shape. The slot opening 7 comprises a square port and a triangular port in communication, one corner of the triangular port is in communication with the square port, the bimetallic strip 3 enters from one corner of the triangular port, which is convenient for entry but not easy to come out, and is beneficial to the stability of the insertion and connection of the bimetallic strip 3.

[0025] The upper part of the thermal tripping pull rod 4 is provided with a sliding connecting piece 8 which is suspended and slidingly connected with the sliding rail 5; the lower part of the thermal tripping pull rod 4 is provided with the slot opening 7. The sliding rail 5 comprises an upper sliding rail and a lower sliding rail, the sliding connecting piece 8 is slidingly connected with the upper sliding rail, the lower sliding rail is slidingly connected with the bottom of the thermal tripping pull rod 4, can hold the thermal tripping pull rod 4, and is arranged at one end away from the slot opening 7, can limit the position of the thermal tripping pull rod, and avoid that the thermal tripping pull rod 4 slides out of the sliding rail 5.

[0026] The other end of the thermal tripping pull rod 4 is provided with a tripping hook 9 which is used for triggering the tripping mechanism 2.

[0027] The thermal tripping pull rod provided by the application is arranged on the upper cover of the circuit breaker, and the other end of the thermal tripping pull rod is arranged close to the tripping mechanism with a set distance A and is limited by the sliding rail; under normal circumstances, the thermal tripping pull rod and the tripping mechanism of the circuit breaker do not contact; when the circuit breaker vibrates, the vibration force cannot be transmitted to the tripping mechanism of the circuit breaker through the thermal tripping pull rod, and the false tripping phenomenon caused by the vibration of the circuit breaker is avoided; the bimetallic strip is connected with one end of the thermal tripping pull rod through the slot opening; under normal circumstances, the bimetallic strip does not deform, and the thermal tripping pull rod does not move; when the bimetallic strip is deformed, the bimetallic strip drives the thermal tripping pull rod to slide along the sliding rail, the other end of the thermal tripping pull rod pulls the tripping mechanism, the tripping mechanism is tripped, and the overheat protection of the circuit breaker is realized.

[0028] The principles and implementation manners of the application are described by using specific examples in the present application, and the above description of the examples is only used for helping to understand the method of the application and the core idea thereof; meanwhile, according to the idea of the application, the specific implementation manners and application ranges can be changed by those skilled in the art. In conclusion, the content of the present description should not be understood as the limitation of the application.

Claims

1. A current limiting circuit breaker with anti-shock performance, comprising a housing base (6) and an upper cover (1), a thermal tripping mechanism composed of a tripping mechanism (2) and a bimetallic strip (3) is arranged on the housing base (6), characterized in that: The current limiting circuit breaker further comprises a thermal tripping pull rod (4), a sliding track (5) is arranged on the upper cover (1), the thermal tripping pull rod (4) is in sliding connection with the sliding track (5), the upper cover (1) is buckled with the shell base (6), the thermal tripping pull rod (4) is arranged between the tripping mechanism (2) and the bimetallic strip (3), one end of the thermal tripping pull rod (4) is connected with the bimetallic strip (3), and the other end is arranged in a set distance A from the tripping mechanism (2), when the bimetallic strip (3) is heated and deformed, the other end of the thermal tripping pull rod (4) triggers the tripping mechanism (2), and power-off tripping is realized. One end of the thermal tripping pull rod (4) is provided with a slot opening (7), the slot opening (7) is used for clamping the bimetallic strip (3), and when the upper cover (1) is buckled with the shell base (6), the bimetallic strip (3) is inserted into the slot opening (7). The slot opening (7) comprises a square port and a triangular port in communication, and one corner of the triangular port is in communication with the square port. The upper part of the thermal tripping pull rod (4) is provided with a sliding connecting piece, the sliding connecting piece is in suspension sliding connection with the sliding track (5); and the lower part of the thermal tripping pull rod (4) is provided with the slot opening (7). The sliding track (5) comprises an upper sliding track and a lower sliding track, the sliding connecting piece (8) and the thermal tripping pull rod (4) are in an integrated structure, the lower sliding track is arranged at one end away from the slot opening (7), and is used for limiting the thermal tripping pull rod (4).

2. The current limiting circuit breaker with anti-shock performance according to claim 1, characterized in that, The other end of the thermal tripping pull rod (4) is provided with a tripping hook (9), and the tripping hook (9) is used for pulling the tripping mechanism (2).

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