An external interface linkage mechanism for a molded case circuit breaker and a circuit breaker

Abstract

The present invention relates to an external interface linkage mechanism and a circuit breaker for a molded case circuit breaker. The linkage mechanism includes a first pressing block, a second pressing block and a connecting rod. The first pressing block and the second pressing block are connected by the connecting rod. The first pressing block is installed on the circuit breaker housing and exposes a pressing portion. The second pressing block is installed inside the circuit breaker housing, and the end of the second pressing block is arranged to match the tripping shaft of the circuit breaker. A first elastic reset member for resetting the first pressing block is provided between the first pressing block and the circuit breaker housing, and a second elastic reset member for resetting the second pressing block is provided between the second pressing block and the circuit breaker housing. This linkage mechanism provides an external linkage interface for the molded case circuit breaker, which can enable an external function module of the circuit breaker to indirectly control the tripping of the circuit breaker, effectively ensuring the use safety of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to an external interface linkage mechanism and a circuit breaker for a molded case circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can also close, carry, and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power supply lines and motors, etc. When they encounter serious overload, short circuit, undervoltage and other faults, they can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-thermal relay, etc., and generally no components need to be changed after interrupting the fault current.

[0003] In a circuit breaker, when it is usually necessary to set some external function modules, such as a leakage module, after setting the external function module, it is necessary to provide a corresponding external linkage interface for the molded case circuit breaker so that the external function module can indirectly control the tripping of the circuit breaker, effectively ensuring the safe use of the circuit breaker. However, there is currently no external interface linkage mechanism with a simple structure and convenient operation. Especially for a 63A frame circuit breaker, due to the compact structure of the circuit breaker, it is difficult to effectively arrange the linkage mechanism. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide an external interface linkage mechanism and a circuit breaker for a molded case circuit breaker, which has a simple structure and reliable operation, is conducive to arranging the linkage mechanism in a complex circuit breaker housing, and effectively realizes the purpose of rapid transmission.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An external interface linkage mechanism for a molded case circuit breaker includes a first pressing block, a second pressing block, and a connecting rod. The first pressing block and the second pressing block are connected by the connecting rod. The first pressing block is installed on the circuit breaker housing and exposes the pressing part. The second pressing block is installed inside the circuit breaker housing, and the end of the second pressing block is arranged to match the tripping shaft of the circuit breaker; a first elastic resetting member for resetting the first pressing block is provided between the first pressing block and the circuit breaker housing, and a second elastic resetting member for resetting the second pressing block is provided between the second pressing block and the circuit breaker housing.

[0007] Further, the connecting rod is a Z-shaped rod. One end of the connecting rod is connected to the first pressing block, and the other end is connected to the second pressing block, so that the first pressing block and the second pressing block move synchronously.

[0008] Further, the first pressing block is a rectangular block, and a first convex stopper is provided on the upper part of the rectangular block. The first elastic reset member is disposed between the first convex stopper and the circuit breaker housing.

[0009] Further, the first convex stopper is a square block, the first elastic reset member is a compression spring, and a first spring guide shaft is further provided on the first convex stopper. A part of the compression spring is sleeved on the first spring guide shaft, and the other part abuts against the circuit breaker housing.

[0010] Further, the second pressing block includes a second convex stopper at the front end and a second spring guide shaft at the rear end. The second elastic reset member is a compression spring. A part of the compression spring is sleeved on the second spring guide shaft, and the other part abuts against the inner of the clamping groove of the circuit breaker housing.

[0011] Further, the second convex stopper is cylindrical, a through hole is provided at the bottom of the clamping groove of the circuit breaker housing, the second spring guide shaft passes through the through hole, and a stopper for pressing the tripping shaft is provided at the end of the second spring guide shaft. The size of the stopper is larger than that of the through hole, and it is installed by an interference fit method.

[0012] Further, the stopper is of an inverted conical structure.

[0013] Further, the pressing portion of the first pressing block is connected to an external function module, which plays a role in controlling the tripping of the circuit breaker.

[0014] With this linkage mechanism of the present invention, when the circuit breaker is connected to other external function modules (such as a leakage module), when the external module operates, the first pressing block of the linkage mechanism is pushed by the external module, and finally the second pressing block operates to push the tripping shaft of the circuit breaker mechanism, so that the circuit breaker mechanism trips, achieving the function of disconnecting the main circuit, and thus realizing the function that the circuit breaker can be tripped by pressing the pressing block at the rear of the circuit breaker.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) It provides an external linkage interface for the molded case circuit breaker, which can indirectly control the tripping of the circuit breaker by an external function module of the circuit breaker, effectively ensuring the use safety of the circuit breaker.

[0017] (2) The structure is simple and the action is reliable. By setting the transmission structure of the first pressing block, the second pressing block and the connecting rod, it is beneficial to arrange the linkage mechanism in the complex circuit breaker housing, effectively achieving the purpose of rapid transmission, and realizing the function that the circuit breaker can be tripped by pressing the pressing block at the rear of the molded case circuit breaker. Description of the Drawings

[0018] Figure 1Schematic three-dimensional structure diagram of the linkage mechanism of the present invention installed in a circuit breaker;

[0019] Figure 2 Schematic cross-sectional view of the linkage mechanism of the present invention installed in a circuit breaker;

[0020] Figures 3 - 5 Schematic overall structure diagram of the linkage mechanism of the present invention installed in a circuit breaker;

[0021] In the figure:

[0022] Linkage mechanism 100, first pressing block 101, second pressing block 102, connecting rod 103, first elastic reset member 104, second elastic reset member 105, first convex stop block 1011, first spring guide shaft 1012, second convex stop block 1021, second spring guide shaft 1022, blocking block 1023;

[0023] Circuit breaker body 200, trip shaft 201, module bracket 202, circuit breaker housing 203, circuit board assembly 204. Specific embodiments

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment

[0026] As Figure 1 、 2 , an external interface linkage mechanism 100 for a molded case circuit breaker includes a first pressing block 101, a second pressing block 102, and a connecting rod 103. The first pressing block 101 and the second pressing block 102 are connected by the connecting rod 103. The connecting rod 103 is a Z-shaped rod. One end of the connecting rod 103 is connected to the first pressing block 101, and the other end is connected to the second pressing block 102, so that the first pressing block 101 and the second pressing block 102 move synchronously.

[0027] The first pressing block 101 is installed on the circuit breaker housing 203 and exposes the pressing portion. The second pressing block 102 is installed inside the circuit breaker housing. For example, when applied to an intelligent circuit breaker, it can be installed on the module bracket 202. The end of the second pressing block 102 is matched with the trip shaft 201 of the circuit breaker; a first elastic reset member 104 for resetting the first pressing block 101 is provided between the first pressing block 101 and the circuit breaker housing, and a second elastic reset member 105 for resetting the second pressing block 102 is provided between the second pressing block 102 and the circuit breaker housing. By pressing the first pressing block 101, the circuit breaker body 200 can be tripped.

[0028] Specifically, as Figure 2, the first pressing block 101 is a rectangular block. A first convex stopper 1011 is provided on the upper part of the rectangular block. A first elastic reset member 104 is arranged between the first convex stopper 1011 and the circuit breaker housing 203. The first convex stopper 1011 is a square block, and the first elastic reset member 104 is a compression spring. A first spring guide shaft 1012 is further provided on the first convex stopper 1011. A part of the compression spring is sleeved on the first spring guide shaft 1012, and the other part abuts against the circuit breaker housing. The second pressing block 102 includes a second convex stopper 1021 at the front end and a second spring guide shaft 1022 at the rear end. The second elastic reset member 105 is a compression spring. A part of the compression spring is sleeved on the second spring guide shaft 1022, and the other part abuts against the inside of the circuit breaker housing slot. The second convex stopper 1021 is cylindrical. A through hole is provided at the bottom of the circuit breaker housing slot. The second spring guide shaft 1022 passes through the through hole. A stopper 1023 for pressing the trip shaft 201 is provided at the end of the second spring guide shaft 1022. The size of the stopper 1023 is larger than the through hole. The stopper 1023 is of an inverted conical structure and is fitted into the module bracket 202 by interference fit and will not fall out by itself.

[0029] As Figures 3 - 5 , the linkage mechanism of the present invention is installed in a molded case circuit breaker with an intelligent trip control module. The pressing part of the first pressing block 101 is connected to an external function module, which plays a role in controlling the circuit breaker to trip. The circuit board assembly 204 is designed in a shape with a slot at the lower part to avoid interference with the connecting rod.

[0030] Through this linkage mechanism, when the circuit breaker is connected to other external function modules (such as a leakage module), when the external module operates, the external module pushes the first pressing block 101 of the linkage mechanism, and finally the second pressing block 102 pushes the trip shaft 201 of the circuit breaker mechanism, so that the circuit breaker mechanism trips, achieving the function of disconnecting the main circuit and realizing the function of enabling the circuit breaker to trip by pressing a button at the rear of the circuit breaker.

[0031] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. An external interface linkage mechanism for a molded case circuit breaker, characterized in that, It includes a first pressing block (101), a second pressing block (102) and a connecting rod (103). The first pressing block (101) is connected to the second pressing block (102) through the connecting rod (103). The first pressing block (101) is installed on the circuit breaker housing and exposes the pressing part. The second pressing block (102) is installed inside the circuit breaker housing. The end of the second pressing block (102) is arranged to match the tripping shaft (201) of the circuit breaker. A first elastic reset member (104) for resetting the first pressing block (101) is provided between the first pressing block (101) and the circuit breaker housing. A second elastic reset member (105) for resetting the second pressing block (102) is provided between the second pressing block (102) and the circuit breaker housing. The first pressing block (101) is a rectangular block. A first convex stop block (1011) is provided on the upper part of the rectangular block. The first elastic reset member (104) is arranged between the first convex stop block (1011) and the circuit breaker housing. The first convex stop block (1011) is a square block. The first elastic reset member (104) is a compression spring. A first spring guide shaft (1012) is also provided on the first convex stop block (1011). A part of the compression spring is sleeved on the first spring guide shaft (1012), and the other part abuts against the circuit breaker housing. The second pressing block (102) includes a second convex stop block (1021) at the front end and a second spring guide shaft (1022) at the rear end. The second elastic reset member (105) is a compression spring. A part of the compression spring is sleeved on the second spring guide shaft (1022), and the other part abuts against the circuit breaker housing slot.

2. The external interface linkage mechanism for a molded case circuit breaker according to claim 1, characterized in that, The connecting rod (103) is a Z-shaped rod. One end of the connecting rod (103) is connected to the first pressing block (101), and the other end is connected to the second pressing block (102), so that the first pressing block (101) and the second pressing block (102) move synchronously.

3. The external interface linkage mechanism for a molded case circuit breaker according to claim 1, characterized in that, The second convex stop block (1021) is cylindrical. A through hole is provided at the bottom of the circuit breaker housing slot. The second spring guide shaft (1022) passes through the through hole. A stop block (1023) for pressing the tripping shaft (201) is provided at the end of the second spring guide shaft (1022). The size of the stop block (1023) is larger than the through hole.

4. The external interface linkage mechanism for a molded case circuit breaker according to claim 3, characterized in that, The stop block (1023) is of an inverted conical structure.

5. An external interface linkage mechanism for a molded case circuit breaker according to any one of claims 1-4, characterized in that, The pressing part of the first pressing block (101) is connected to an external function module, which plays a role in controlling the tripping of the circuit breaker.

6. A circuit breaker, characterized in that, With the external interface linkage mechanism as described in claim 1.

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