Rotating shaft for molded case circuit breaker and molded case circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a rotating shaft for a molded case circuit breaker, which comprises a rotating shaft main body comprising a first shaft body and second shaft bodies, the first shaft body is positioned in the middle of the rotating shaft main body, and the second shaft bodies are positioned at two ends of the rotating shaft main body; the limiting block is arranged on the rotating shaft main body and is positioned between the first shaft body and the second shaft body; the plurality of mounting seats are respectively arranged on the first shaft body and the second shaft body, and mounting grooves for placing the movable contacts are formed in the mounting seats; the first shaft body of the rotating shaft main body is also provided with a connecting convex strip; the beneficial effects of the utility model are that the rotating shaft is provided with the limiting block, thereby achieving a certain positioning effect on the installation of the rotating shaft in the molded case circuit breaker, and facilitating the assembly and connection of the molded case circuit breaker; and meanwhile, the movement of the rotating shaft in the molded case circuit breaker along the axial direction can be limited, and the stability of the internal structure of the molded case circuit breaker is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a rotating shaft for a molded case circuit breaker and the molded case circuit breaker. Background Art

[0002] Molded case circuit breakers can automatically cut off the current when the current exceeds the trip setting. The molded case refers to the use of plastic insulators as the outer shell of the device to isolate the conductors and the grounded metal parts.

[0003] A molded case circuit breaker usually includes a shell, a stationary contact piece arranged in the shell, and a moving contact piece rotatably arranged in the shell. The moving contact piece is arranged on a rotating shaft, and a handle for driving the rotating shaft to rotate is provided on the rotating shaft. The handle extends from the shell. The operator drives the moving contact piece and the stationary contact piece to contact and separate through the handle, thereby realizing the opening and closing operations of the circuit breaker.

[0004] In the prior art, a mounting seat for mounting a moving contact piece is provided on the rotating shaft, and the mounting seat is clamped and connected to the rotating shaft. Since the length of the rotating shaft cannot be fully matched with the size of the mounting cavity of the molded case circuit breaker, the rotating shaft is easily offset in the axial direction inside the molded case circuit breaker, thereby causing the mounting seat on the rotating shaft body to offset, which is easy to affect the connection reliability of the moving contact and the static contact. Utility Model Content

[0005] The purpose of the utility model is to provide a rotating shaft for a molded case circuit breaker in view of the above-mentioned technical problems, which achieves the effects of convenient installation and reliable connection.

[0006] In view of this, the utility model provides a rotating shaft for a molded case circuit breaker, comprising:

[0007] A rotating shaft body, the rotating shaft body comprising a first shaft body and a second shaft body, the first shaft body is located in the middle of the rotating shaft body, and the second shaft body is located at both ends of the rotating shaft body;

[0008] A limit block, which is arranged on the rotating shaft body and located between the first shaft body and the second shaft body;

[0009] A plurality of mounting seats, wherein the plurality of mounting seats are respectively arranged on the first shaft body and the second shaft body, and the mounting seats are provided with mounting grooves for placing moving contacts;

[0010] Wherein, a connecting convex strip is also provided on the first shaft body of the rotating shaft main body.

[0011] Furthermore, the limit block is integrally connected to the rotating shaft body.

[0012] Furthermore, a chamfered structure is provided at the connection between the limit block and the shaft body.

[0013] Furthermore, the mounting seat is integrally connected to the rotating shaft body.

[0014] Furthermore, the connecting convex strip and the first shaft body are an integral structure.

[0015] A molded case circuit breaker comprises a rotating shaft for a molded case circuit breaker as described in any one of the above items.

[0016] The beneficial effects of the utility model are:

[0017] 1. By arranging a limit block on the rotating shaft, it plays a certain positioning role in the installation of the rotating shaft in the molded case circuit breaker, which facilitates the assembly and connection of the molded case circuit breaker; at the same time, it can also limit the movement of the rotating shaft in the axial direction in the molded case circuit breaker, thereby improving the stability of the internal structure of the molded case circuit breaker.

[0018] 2. By arranging connecting convex strips on the rotating shaft, the connection firmness between the rotating shaft and the handle device of the molded case circuit breaker is improved, the risk of accidental falling off or loosening is reduced, safety is enhanced, and it is ensured that the circuit breaker will not cause operation failure or danger due to the falling off or loosening of the handle during operation; at the same time, it can also make the operator more stable and reliable in controlling the handle to drive the rotating shaft to rotate, reduce unnecessary swinging or shaking, and improve the accuracy and controllability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure in which the rotating shaft of the utility model is installed in a molded case circuit breaker;

[0021] The symbols in the figure are:

[0022] 1. First axis; 2. Second axis; 3. Limit block; 4. Mounting seat; 5. Mounting groove; 6. Connecting convex strip. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] Embodiment 1:

[0026] This embodiment provides a rotating shaft for a molded case circuit breaker, comprising:

[0027] A shaft body, the shaft body comprising a first shaft body 1 and a second shaft body 2, wherein the first shaft body 1 is located in the middle of the shaft body, and the second shaft body 2 is located at both ends of the shaft body;

[0028] A limit block 3, wherein the limit block 3 is arranged on the rotating shaft body and is located between the first shaft body 1 and the second shaft body 2;

[0029] A plurality of mounting seats 4, wherein the plurality of mounting seats 4 are respectively arranged on the first shaft body 1 and the second shaft body 2, and a mounting groove 5 for placing a moving contact is provided in the mounting seat 4;

[0030] Wherein, a connecting convex strip 6 is also provided on the first shaft body 1 of the shaft main body.

[0031] In the present technical solution, a handle device is generally provided on the molded case circuit breaker, and the handle device allows the operator to manually put the circuit breaker into an open or closed state. By rotating the handle, the operator can open or close the contacts (or switches) of the circuit breaker, thereby disconnecting or restoring the circuit path. After the circuit breaker trips, the handle device is also usually used to manually reset the circuit breaker. After the fault is resolved, the circuit breaker is put back into a closed state by manually operating the handle to resume normal operation.

[0032] In addition, in an emergency, the operator can quickly cut off the circuit through the handle device to protect equipment or personnel from damage. Once a fire, circuit failure or other emergency occurs, the operator can quickly operate the handle to trip the circuit breaker and cut off the power supply to prevent the situation from escalating.

[0033] When the rotating shaft is installed in a molded case circuit breaker for use, both ends of the rotating shaft are rotatably arranged in the shell, and the first shaft body 1 and the second shaft body 2 of the rotating shaft are respectively located in different installation cavities, so that the mounting seats 4 on the first shaft body 1 and the second shaft body 2 are respectively located in different cavities, and the limit block 3 abuts against the inner wall of the cavity to limit the axial movement of the rotating shaft, thereby improving the installation stability of the rotating shaft in the molded case circuit breaker.

[0034] The moving contact of the molded case circuit breaker is installed in the mounting groove 5 of the mounting seat 4 and connected to the arc extinguishing system in the molded case circuit breaker. The handle of the molded case circuit breaker is connected to the first shaft 1 of the rotating shaft. The connecting convex strip 6 on the first shaft 1 is fixed to the handle. When the operator manually rotates the handle, the rotating shaft will be driven to rotate as a whole, thereby realizing the opening or closing of the molded case circuit breaker contacts.

[0035] To sum up, by arranging the limit block 3 on the rotating shaft, it plays a certain positioning role in the installation of the rotating shaft in the molded case circuit breaker, which facilitates the assembly and connection of the molded case circuit breaker; at the same time, it can also limit the movement of the rotating shaft in the axial direction in the molded case circuit breaker, thereby improving the stability of the internal structure of the molded case circuit breaker.

[0036] By arranging the connecting convex strip 6 on the rotating shaft, the connection firmness between the rotating shaft and the handle device of the molded case circuit breaker is improved, the risk of accidental falling off or loosening is reduced, the safety is enhanced, and it is ensured that the circuit breaker will not cause operation failure or danger due to the falling off or loosening of the handle during operation; at the same time, it can also make the operator more stable and reliable when controlling the handle to drive the rotating shaft to rotate, reduce unnecessary swinging or shaking, and improve the accuracy and controllability of the operation.

[0037] Embodiment 2:

[0038] This embodiment provides a rotating shaft for a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] Furthermore, the limit block 3 is integrally connected to the shaft body.

[0040] In this technical solution, the limit block 3 is an integrated structure with the shaft body, which simplifies the installation connection between the shaft body and the limit block 3. Compared with the method of installing the limit block 3 separately, the integrated structure is more compact and reduces the number of parts and the complexity of the device.

[0041] Furthermore, a chamfered structure is provided at the connection between the limit block 3 and the shaft body to reduce the sharp edge of the connection between the limit block 3 and the shaft body, disperse stress concentration at the connection, reduce the risk of breakage, and improve the connection strength and reliability.

[0042] Embodiment 3:

[0043] This embodiment provides a rotating shaft for a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] Furthermore, the mounting seat 4 is integrally connected to the shaft body.

[0045] In the present technical solution, the mounting seat 4 and the rotating shaft body are also an integrated connection structure, which enhances the connection strength between the mounting seat 4 and the rotating shaft body, and makes the structural design between the mounting seat 4 and the rotating shaft body more compact, reduces looseness or wear between the mounting seat 4 and the rotating shaft body, and enhances the durability of the rotating shaft.

[0046] Embodiment 4:

[0047] This embodiment provides a rotating shaft for a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] Furthermore, the connecting ridge 6 and the first shaft body 1 are an integral structure.

[0049] In the present technical solution, the connecting convex strip 6 is designed to be integrally connected with the first shaft body 1, thereby enhancing the connection firmness between the connecting convex strip 6 and the rotating shaft body, thereby enhancing the connection stability between the rotating shaft and the handle of the molded case circuit breaker, thereby making the handle's rotation control of the rotating shaft more stable and reliable, and highly practical.

[0050] Embodiment 5:

[0051] This embodiment provides a molded case circuit breaker, including a rotating shaft for a molded case circuit breaker as described in any one of the above embodiments 1-4.

[0052] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A rotating shaft for a molded case circuit breaker, characterized in that: include: A rotating shaft body, the rotating shaft body comprising a first shaft body (1) and a second shaft body (2), the first shaft body (1) being located in the middle of the rotating shaft body, and the second shaft body (2) being located at both ends of the rotating shaft body; A limit block (3), wherein the limit block (3) is arranged on the rotating shaft body and is located between the first shaft body (1) and the second shaft body (2); A plurality of mounting seats (4), wherein the plurality of mounting seats (4) are respectively arranged on the first shaft body (1) and the second shaft body (2), and a mounting groove (5) for accommodating a moving contact is provided in the mounting seat (4); Wherein, a connecting convex strip (6) is also provided on the first shaft body (1) of the rotating shaft main body.

2. The rotating shaft for a molded case circuit breaker according to claim 1, characterized in that: The limit block (3) is integrally connected to the rotating shaft body.

3. The rotating shaft for a molded case circuit breaker according to claim 2, characterized in that: A chamfered structure is provided at the connection between the limit block (3) and the rotating shaft body.

4. The rotating shaft for a molded case circuit breaker according to claim 1, characterized in that: The mounting seat (4) is integrally connected to the rotating shaft body.

5. The rotating shaft for a molded case circuit breaker according to claim 1, characterized in that: The connecting convex strip (6) and the first shaft body (1) are an integral structure.

6. A molded case circuit breaker, characterized in that: A rotating shaft for a molded case circuit breaker comprising any one of claims 1 to 5.

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