Tripping mechanism of circuit breaker

Abstract

A tripping mechanism of a circuit breaker comprises a magnetic tripper, the magnetic tripper can move in linkage with a middle tripping rod, the middle tripping rod can be in linkage with a lock catch to trip the mechanism in the moving process, and the rotating center of the middle tripping rod is the same as that of a moving contact. A middle tripping piece is additionally arranged between an existing magnetic tripper and a lock catch, the action point of the magnetic tripper is extended, tripping of a large-opening-distance mechanism is achieved, a rotating center does not need to be additionally arranged for arranging a middle tripping rod, the structure is simple, and space is saved; meanwhile, the rotation center of the middle tripping rod is the same as that of the moving contact, and the middle tripping rod can drive the moving contact to move synchronously after tripping.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and more specifically relates to a tripping mechanism of a circuit breaker. Background Art

[0002] As one of the essential electrical components in a circuit, a miniature circuit breaker plays a role of control and protection in the power system. A circuit breaker mainly includes a conductive system, an arc extinguishing system, an operating mechanism, etc. The release is an important part of the operating mechanism of the circuit breaker. In existing small circuit breaker products, the release is that the magnetic release directly acts on the latch. In some usage scenarios, the distance between the latch and the magnetic release is relatively far and not within the linear motion area of the ejector rod. The magnetic release cannot be directly linked with the latch, and the function of tripping the mechanism cannot be achieved. Content of the Utility Model

[0003] Aiming at the above-mentioned defect that the distance between the existing latch and the magnetic release is relatively far and not within the linear motion area of the ejector rod, and the magnetic release cannot be directly linked with the latch, resulting in the inability to achieve the function of tripping the mechanism, the purpose of the utility model is to provide a tripping mechanism of a circuit breaker, which adds an intermediate tripping part between the existing magnetic release and the latch, realizes the extension of the action point of the magnetic release, and enables the realization of the function of tripping the mechanism.

[0004] Technical Solution

[0005] In order to achieve the above technical purpose, the utility model provides a tripping mechanism of a circuit breaker, which includes a magnetic release, and is characterized in that: the action of the magnetic release can drive the movement of an intermediate tripping rod, and during the movement of the intermediate tripping rod, it can be linked with the latch to trip the mechanism, and the intermediate tripping rod has the same rotation center as the moving contact.

[0006] In one of the embodiments, a return spring is connected to the intermediate tripping rod.

[0007] In one of the embodiments, a limiting groove is provided on the side surface of the intermediate tripping rod corresponding to the moving contact, and the limiting groove can limit the rotational displacement of the intermediate tripping rod.

[0008] In one of the embodiments, after the mechanism trips, the limiting groove can drive the intermediate tripping rod and the moving contact to move synchronously.

[0009] In one of the embodiments, a linkage protrusion 501 is provided on the moving contact at a position corresponding to the limiting groove.

[0010] In one of the embodiments, a force-receiving part linked with the magnetic release is provided on the side surface of the intermediate tripping rod corresponding to the magnetic release, and a striking part linked with the latch is provided on the side surface of the intermediate tripping rod corresponding to the latch.

[0011] Further, the force-bearing part is an arc surface.

[0012] Further, the striking part is a plane.

[0013] In one embodiment, one end of the return spring is mounted on the intermediate trip lever, and the other end is mounted on the housing.

[0014] Beneficial effects

[0015] The present utility model provides a trip mechanism for a circuit breaker, which includes a magnetic release. The action of the magnetic release can drive the intermediate trip lever to move. During the movement of the intermediate trip lever, it can be linked with the latch to release the mechanism. The intermediate trip lever has the same rotation center as the moving contact. An intermediate trip part is added between the existing magnetic release and the latch, the action point of the magnetic release is extended, the release of the large-opening mechanism is realized, and there is no need to additionally add a rotation center to set the intermediate trip lever, with a simple structure and space saving. At the same time, the intermediate trip lever has the same rotation center as the moving contact, and after release, the intermediate trip lever can drive the moving contact to move synchronously. Brief description of the drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0017] Att Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0018] Att Figure 2 is a schematic diagram of the intermediate trip lever in an embodiment of the present utility model Figure 1 .

[0019] Att Figure 3 is a schematic diagram of the intermediate trip lever in an embodiment of the present utility model Figure 2 .

[0020] Att Figure 4 is a schematic diagram of the force-bearing surface of the intermediate trip lever in an embodiment of the present utility model.

[0021] Att Figure 5 is a schematic diagram of the striking surface of the intermediate trip lever in an embodiment of the present utility model. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0023] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation manner.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature on or under the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0026] Unless otherwise defined, all the technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementation manners and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0027] Embodiment

[0028] As shown in the attached Figure 1As shown in the figure, a tripping mechanism of a circuit breaker includes a magnetic release 1. When the magnetic release 1 operates, it can drive the intermediate tripping lever 2 to move. During the movement of the intermediate tripping lever 2, it can be linked with the latch 3 to cause the mechanism to trip. A return spring 4 is connected to the intermediate tripping lever 2. One end of the return spring 4 is installed in the spring hole 2a on the intermediate tripping lever 2, and the other end is installed in the connection hole 6a on the housing 6. The return spring functions to reset the intermediate tripping lever 2 to its initial position under the action of this return spring after the tripping is completed. Alternatively, the spring installation at this location can be cancelled, and a return torsion spring can be added to the lower side of the intermediate tripping lever 2, which can also achieve the reset function of the intermediate tripping lever 2.

[0029] The intermediate tripping lever 2 has the same rotation center as the moving contact 5. As shown in the appendix Figure 2 and 3 As shown, a limit groove 201 is provided on one side of the intermediate tripping lever 2 corresponding to the moving contact 5. The limit groove 201 can limit the rotational displacement of the intermediate tripping lever 2. After the mechanism trips, the limit groove 201 can drive the intermediate tripping lever 2 and the moving contact 5 to move synchronously through its limit surface 201a, improving the initial opening speed of the mechanism. A linkage protrusion 501 is provided on the moving contact 5 at the position corresponding to the limit groove 201.

[0030] As shown in the appendix Figure 4 and 5 As shown, a force-receiving portion 202 linked with the magnetic release 1 is provided on one side of the intermediate tripping lever 2 corresponding to the magnetic release 1, and a striking portion 203 linked with the latch 3 is provided on one side of the intermediate tripping lever 2 corresponding to the latch 3. The force-receiving portion 202 is an arc surface that matches the ejector rod of the magnetic release 1, and the striking portion 203 is a flat surface that matches the struck surface 301 of the latch 3, ensuring that the tripping force cannot be diverted by the acting surfaces in other directions during the process of force transfer through contact.

[0031] In this embodiment, after the intermediate tripping lever 2 receives the push of the ejector rod 101 of the magnetic release 1 and strikes the latch 3, the latch 3 rotates upward to open the latch surface, and the toggle 7 jumps open due to the restoring force of the return torsion spring provided at its rotation center, completing the entire tripping process. Among them, after the intermediate tripping lever 2 strikes the latch 3, it returns to its original position due to the restoring force of the return spring 4 and the reaction force of the latch 3.

[0032] The present utility model provides a tripping mechanism of a circuit breaker. An intermediate tripping part is added between the existing magnetic release and the latch. The acting point of the magnetic release is extended, realizing the tripping of a large-opening-distance mechanism, and there is no need to additionally increase a rotation center to set the intermediate tripping lever, with a simple structure and space saving. At the same time, the intermediate tripping lever has the same rotation center as the moving contact, and after tripping, the intermediate tripping lever can drive the moving contact to move synchronously.

[0033] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0034] The above-described embodiments merely represent several implementation manners of the present application, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A tripping mechanism of a circuit breaker, comprising a magnetic tripping device (1), characterized in that: The action of the magnetic release (1) can be linked to the movement of the intermediate release rod (2); during the movement of the intermediate release rod (2), it can be linked to the lock (3) to release the mechanism; the rotation center of the intermediate release rod (2) is the same as that of the moving contact (5).

2. A tripping mechanism for a circuit breaker according to claim 1, characterized in that: The intermediate tripping rod (2) is connected to a return spring (4).

3. A tripping mechanism for a circuit breaker according to claim 1, characterized in that: A limiting groove (201) is provided on a side surface of the intermediate tripping rod (2) corresponding to the moving contact (5), and the limiting groove (201) can limit the rotational displacement of the intermediate tripping rod (2).

4. A tripping mechanism for a circuit breaker according to claim 3, characterized in that: The limiting groove (201) can drive the intermediate tripping rod (2) and the moving contact (5) to move synchronously after the mechanism is tripped.

5. A tripping mechanism for a circuit breaker according to claim 3, characterized in that: A linkage protrusion (501) is provided on the moving contact (5) at a position corresponding to the limiting groove (201).

6. A tripping mechanism for a circuit breaker according to claim 1, characterized in that: A force-bearing portion (202) that is linked to the magnetic release (1) is provided on a side surface of the intermediate release rod (2) corresponding to the magnetic release (1), and a striking portion (203) that is linked to the lock (3) is provided on a side surface of the intermediate release rod (2) corresponding to the lock (3).

7. A tripping mechanism for a circuit breaker according to claim 6, characterized in that: The force-bearing portion (202) is an arc surface.

8. A tripping mechanism for a circuit breaker according to claim 6, characterized in that: The striking part (203) is a plane.

9. A tripping mechanism for a circuit breaker according to claim 2, characterized in that: One end of the reset spring (4) is mounted on the intermediate tripping rod (2), and the other end is mounted on the housing (6).

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