Moving contact assembly and molded case circuit breaker

Abstract

The utility model discloses a moving contact assembly, which comprises a moving contact and a moving contact plate, the moving contact plate comprises a base body part, one end of the base body part is lifted upwards to form a lifting part, one side of the lifting part is provided with a transmission side plate, the transmission side plate is rotatably connected with a moving contact rotating shaft, the moving contact rotating shaft comprises a rotating part, a transmission part, a locking part and a matching part, the rotating part is movably connected to the transmission side plate, the moving contact is connected to the transmission part, a fastener is arranged on the side, away from the transmission side plate, of the moving contact, the fastener is connected to the locking part, a positioning hole matched with the matching part is formed in the rotating part, and a flexible wire is connected between the moving contact and the lifting part. According to the utility model, the size of the moving contact assembly is greatly reduced, the assembly efficiency is effectively improved, and the width occupied by each phase of the molded case circuit breaker is narrowed, so that the molded case circuit breaker is miniaturized; compared with an existing molded case circuit breaker, a conductive system of the flexible wire between the moving contact and the lifting part is shorter, and the temperature rise effect of the flexible wire is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic case circuit breakers, in particular to a moving contact assembly and a plastic case circuit breaker. Background Art

[0002] A plastic case circuit breaker is a switching device that can carry and break the current under abnormal circuit conditions within a specified time. Inside the plastic case circuit breaker, there are a moving contact and a static contact that can perform on-off operations, and the moving contact is driven by an operating mechanism.

[0003] With the higher requirements for the electrical load and product volume miniaturization of low-voltage distribution systems, however, limited by the volume, in the development, production and use of large-current plastic case circuit breakers, there are quality problems such as high temperature rise in the electrical connection part of the moving contact assembly due to too long flexible connecting wires, which even affect the normal use of the product, and the transmission structure of the moving contact assembly is complex to assemble, reducing the production efficiency. Summary of the Utility Model

[0004] To solve the above problems, the technical solution provided by the utility model is as follows:

[0005] A moving contact assembly includes a moving contact and a moving contact plate. The moving contact plate includes a base portion, one end of the base portion is lifted upward to form a lifting portion, a transmission side plate is provided on one side of the lifting portion, a moving contact rotating shaft is rotatably connected to the transmission side plate. The moving contact rotating shaft includes a rotating portion, a transmission portion, a locking portion and a matching portion. The rotating portion is movably connected to the transmission side plate, the moving contact is connected to the transmission portion, a fastener is provided on the side of the moving contact away from the transmission side plate, the fastener is connected to the locking portion, a positioning hole adapted to the matching portion is provided on the rotating portion, and a flexible wire is connected between the moving contact and the lifting portion.

[0006] The utility model is further provided in that a disc spring is further connected to the transmission portion, and the disc spring is arranged between the moving contact and the fastener.

[0007] The utility model is further provided in that matching holes are provided on both the moving contact and the disc spring, and the transmission portion passes through the matching holes in sequence.

[0008] The utility model is further provided in that a connecting portion is provided on one side of the rotating direction of the moving contact, a wire hole is provided on the lifting portion, and both ends of the flexible wire are welded to the connecting portion and the guiding hole respectively.

[0009] The utility model is further provided in that the fastener is a nut, an external thread is provided on the outer periphery of the locking portion, and the internal thread of the nut is matched with the external thread.

[0010] The utility model is further configured such that the size of the locking portion is smaller than the size of the transmission portion.

[0011] The utility model is further configured such that the size of the matching portion is smaller than the size of the locking portion.

[0012] The utility model is further configured such that an annular portion is provided between the rotating portion and the transmission portion, and one side of the moving contact is in close contact with a side surface of the annular portion.

[0013] The utility model is further configured that the movable contact shaft is integrally formed.

[0014] A molded case circuit breaker comprises at least one set of the above-mentioned moving contact assembly.

[0015] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0016] In the technical solution, the moving contact assemblies can be assembled through the rotating part and the matching part, so that the moving contact assemblies can be linked to perform closing and breaking actions. The transmission structure of the moving contact and the moving contact plate is compact, which greatly reduces the volume of the moving contact assembly, effectively improves the assembly efficiency, and narrows the width of each phase of the molded case circuit breaker, making the molded case circuit breaker miniaturized; the soft wire between the moving contact and the lifting part is shorter than the existing molded case circuit breaker conductive system, reducing the temperature rise effect of the soft wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the moving contact assembly according to an embodiment of the utility model.

[0018] Figure 2 This is an exploded view of the moving contact assembly of an embodiment of the utility model.

[0019] Figure 3 This is a three-dimensional diagram of the movable contact shaft of an embodiment of the utility model.

[0020] Figure 4 This is a three-dimensional diagram of a movable touch panel according to an embodiment of the present utility model.

[0021] Figure 5 This is a three-dimensional diagram of the assembled moving contact assembly of the third embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection, or it can be the communication inside two components; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] Combined with the attached Figure 1 to the attached Figure 4 As shown in the figures, the technical solution of the present utility model is a moving contact assembly, including a moving contact 1 and a moving contact plate 2. The moving contact plate 2 includes a base portion 21. One end of the base portion 21 is lifted upward to form a lifting portion 22. A transmission side plate 23 is provided on one side of the lifting portion 22. A moving contact rotating shaft 3 is rotatably connected to the transmission side plate 23. The moving contact rotating shaft 3 includes a rotating portion 31, a transmission portion 32, a locking portion 33, and a mating portion 34. The rotating portion 31 is movably connected to the transmission side plate 23. The moving contact 1 is connected to the transmission portion 32. A fastener 4 is provided on the side of the moving contact 1 away from the transmission side plate 23. The fastener 4 is connected to the locking portion 33. A positioning hole 35 adapted to the mating portion 34 is formed in the rotating portion 31. A flexible wire 5 is connected between the moving contact 1 and the lifting portion 22.

[0027] In the above embodiment, the mating portion 34 of the phase-interval moving contact assembly can be connected and mated with the positioning hole 35 of the adjacent moving contact assembly to realize the assembly of the phase-interval moving contact assembly.

[0028] In the above embodiment, the length of the flexible wire 5 does not exceed 1.5 cm.

[0029] In this embodiment, a disc spring 6 is further connected to the transmission portion 32. The disc spring 6 is arranged between the moving contact 1 and the fastener 4; the disc spring 6 ensures that the moving contact 1 can be stably connected to the moving contact rotating shaft 3.

[0030] In this embodiment, a mating hole 11 is formed in the moving contact 1, and a mating hole 61 is formed in the disc spring 6. The transmission portion 32 is sequentially inserted into the mating hole 11 and the mating hole 61.

[0031] In this embodiment, a connecting portion 12 is provided on one side of the rotation direction of the moving contact 1, and a wire hole 221 is opened on the lifting portion 22, and the two ends of the soft wire 5 are respectively welded on the connecting portion 12 and in the guide hole 221; the connecting portion 12 is arranged close to the lifting portion 22, and the lifting portion 22 is one end of the moving contact plate 2 close to the moving contact 1, which can further shorten the length of the soft wire 5.

[0032] In this embodiment, the fastener 4 is a nut, and an outer circumference of the locking portion 33 is provided with an external thread, and the internal thread of the nut cooperates with the external thread.

[0033] In this embodiment, the size of the locking portion 33 is smaller than the size of the transmission portion 32 .

[0034] In this embodiment, the size of the matching portion 34 is smaller than the size of the locking portion 33 .

[0035] In this embodiment, an annular portion 36 is further provided between the rotating portion 31 and the transmission portion 32 , and one side of the moving contact 1 is in close contact with the side surface of the annular portion 36 .

[0036] In this embodiment, the moving contact shaft 3 is integrally formed.

[0037] The moving contact assemblies of the utility model can be assembled through the rotating part 31 and the matching part 34, so that the moving contact assemblies can be linked to perform closing and breaking actions. The transmission structure of the moving contact 1 and the moving contact plate 2 is compact, which greatly reduces the volume of the moving contact assembly, effectively improves the assembly efficiency, and narrows the width of each phase of the molded case circuit breaker, making the molded case circuit breaker miniaturized; the soft wire 5 between the moving contact 1 and the lifting part 22 is shorter than the existing molded case circuit breaker conductive system, reducing the temperature rise effect of the soft wire.

[0038] Example 2

[0039] The technical solution of the utility model is a molded case circuit breaker, comprising at least one group of moving contact assemblies described in embodiment 1.

[0040] As attached Figure 5 As shown, the structure of three sets of moving contact assemblies in the three-phase molded case circuit breaker is assembled.

[0041] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A moving contact assembly, characterized in that, It includes a moving contact and a moving contact plate. The moving contact plate includes a base portion, one end of the base portion is lifted upward to form a lifting portion, a transmission side plate is provided on one side of the lifting portion, a moving contact rotating shaft is rotatably connected to the transmission side plate. The moving contact rotating shaft includes a rotating portion, a transmission portion, a locking portion and a matching portion. The rotating portion is movably connected to the transmission side plate, the moving contact is connected to the transmission portion, a fastener is provided on the side of the moving contact away from the transmission side plate, the fastener is connected to the locking portion, a positioning hole adapted to the matching portion is formed on the rotating portion, and a flexible wire is connected between the moving contact and the lifting portion.

2. The movable contact assembly according to claim 1, characterized in that, A disc spring is further connected to the transmission portion, and the disc spring is arranged between the moving contact and the fastener.

3. The moving contact assembly according to claim 2, characterized in that Matching holes are formed on both the moving contact and the disc spring, and the transmission portion passes through the matching holes in sequence.

4. A moving contact assembly according to claim 1, characterized in that, A connecting portion is provided on one side of the moving contact in the rotation direction, a wire hole is formed on the lifting portion, and both ends of the flexible wire are welded to the connecting portion and the guiding hole respectively.

5. A moving contact assembly according to any one of claims 1 to 4, characterized in that The fastener is a nut, an external thread is provided on the outer periphery of the locking portion, and the internal thread of the nut cooperates with the external thread.

6. A moving contact assembly according to any one of claims 1 to 4, characterized in that The size of the locking portion is smaller than the size of the transmission portion.

7. A moving contact assembly according to any one of claims 1 to 4, characterized in that, The size of the matching portion is smaller than the size of the locking portion.

8. A moving contact assembly according to any one of claims 1 to 4, characterized in that, An annular portion is further provided between the rotating portion and the transmission portion, and one side of the moving contact is in close contact with the side surface of the annular portion.

9. A moving contact assembly according to any one of claims 1 to 4, characterized in that The moving contact rotating shaft is integrally formed.

10. A molded case circuit breaker, characterized in that, It includes at least one set of the moving contact assembly according to any one of claims 1 to 9.

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