Moving contact assembly of molded case circuit breaker

Abstract

The moving contact assembly comprises a clamping plate assembly, the clamping plate assembly comprises clamping plates, a rotating rod, fixing rods and a spring, the surface of the rotating rod is sleeved with the two clamping plates, the fixing rods are fixedly installed on the surfaces of the tops and the bottoms of the rear ends of the clamping plates, and the two fixing rods are connected through the spring. A moving contact and moving contact seats are arranged on the surface of the rotating rod and located between the two clamping plates, and the moving contact seats are located on the two sides of the moving contact. In combination with the structural design of the utility model, the structural design is simple, and the spacing sheets are arranged at the two sides of the moving contact, so that the gap between the moving contact and the clamping plate is reduced, the moving contact plays a role in limiting left-right shaking under the acting force of the spring, and the problem proposed in the background technology is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of molded case circuit breakers, and particularly to a moving contact assembly of a molded case circuit breaker. Background Technique

[0002] A molded case circuit breaker is a protection device in a low-voltage power distribution system, which plays the role of connecting and disconnecting normal working current and automatically and quickly cutting off the fault current when a circuit fault occurs in the low-voltage power distribution system.

[0003] However, in the prior art, the moving contact inside the molded case circuit breaker is prone to left and right shaking under the action of the compression spring, resulting in faults, and the overall installation is inconvenient. Special tooling is required for assembling the compression spring inside the rotating shaft; the contact position between the pressure plate and the spring is not stable, the force is uneven, which easily causes uneven contact pressure of the contact and affects the stability of the mechanism. Summary of the Invention

[0004] The purpose of the utility model is to provide a moving contact assembly of a molded case circuit breaker, so as to solve the problems mentioned in the above background technique that the moving contact inside the molded case circuit breaker is prone to left and right shaking under the action of the compression spring, resulting in faults, and the overall installation is inconvenient. Special tooling is required for assembling the compression spring inside the rotating shaft; the contact position between the pressure plate and the spring is not stable, the force is uneven, which easily causes uneven contact pressure of the contact and affects the stability of the mechanism.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A moving contact assembly of a molded case circuit breaker includes a splint assembly. The splint assembly includes splints, a rotating rod, a fixed rod and a spring. Two splints are sleeved on the surface of the rotating rod. Fixed rods are fixedly installed on the top and bottom surfaces at the rear end of the splints. The two fixed rods are connected by a spring. A moving contact and a moving contact seat are arranged on the surface of the rotating rod between the two splints, and the moving contact seat is located on both sides of the moving contact.

[0006] Preferably, the moving contact seat includes a fixed seat, a connecting plate and a limiting piece. A connecting plate is vertically fixedly connected to one end surface of the fixed seat. Limiting pieces are symmetrically fixedly connected to the end of the connecting plate surface far away from the fixed seat, and the limiting pieces are arranged on both sides of the moving contact.

[0007] Preferably, a connecting hole is opened in the middle of the surface of the limiting piece, and the limiting piece 73 is movably connected to the surface of the rotating rod through the inner wall of the connecting hole.

[0008] Preferably, an avoidance opening is opened at the top of the connecting plate, and a fixing hole is opened in the middle of the surface of the fixed seat.

[0009] Preferably, the moving contact seat adopts an integrally formed structural design.

[0010] Preferably, clamping grooves are formed on both sides of the surface of the fixed rod, and springs are clamped in the clamping grooves.

[0011] Advantages

[0012] Compared with the existing technology, the advantages of the present utility model are as follows:

[0013] Combined with the structural design of the present utility model, its structural design is simple. By arranging limiting pieces on both sides of the moving contact, the gap between the moving contact and the clamping plate is reduced, so that under the action of the spring, the moving contact is restricted from swaying left and right, effectively solving the problems raised in the background art. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the moving contact seat of the present utility model.

[0016] 1. Clamping plate assembly; 2. Clamping plate; 3. Rotating rod; 4. Spring; 5. Fixed rod; 6. Moving contact;

[0017] 7. Moving contact seat; 51. Clamping groove; 71. Fixed seat; 72. Connecting plate; 73. Limiting piece; 74. Connecting hole;

[0018] 75. Fixed hole; 76. Avoidance opening. Specific Embodiments

[0019] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] Such as Figure 1-2It is a schematic structural diagram of a moving contact assembly of a plastic case circuit breaker according to a preferred embodiment of the present invention. In this embodiment, a moving contact assembly of a plastic case circuit breaker includes a clamping plate assembly 1. The clamping plate assembly 1 includes clamping plates 2, a rotating rod 3, a fixed rod 5, and a spring 4. Two clamping plates 2 are sleeved on the surface of the rotating rod 3. The rotation of the rotating rod 3 drives the clamping plates 2 and the moving contact 6 to rotate. Fixed rods 5 are fixedly installed on the top and bottom surfaces at the rear end of the clamping plates 2. A spring 4 is connected between the two fixed rods 5. This structural design enables the moving contact 6 to utilize the elasticity of the spring 4 to quickly separate from the static contact during the breaking process. Between the two clamping plates 2 on the surface of the rotating rod 3, there are a moving contact 6 and a moving contact seat 7. The moving contact 6 is fixedly connected to the rotating rod 3, so that the rotating rod 3 can drive the moving contact 6 to rotate during rotation, and the moving contact seat 7 is located on both sides of the moving contact 6.

[0022] In this embodiment, the moving contact seat 7 includes a fixed seat 71, a connecting plate 72, and a limiting piece 73. A connecting plate 72 is vertically fixedly connected to one end surface of the fixed seat 71. Limiting pieces 73 are symmetrically fixedly connected to the surface of the connecting plate 72 away from the fixed seat 71, and the limiting pieces 73 are arranged on both sides of the moving contact 6. By arranging the limiting pieces 73 on both sides of the moving contact 6, the gap between the moving contact 6 and the inner wall of the clamping plate 2 is reduced, so that the moving contact 6 can be restricted from shaking left and right under the action of the spring 4.

[0023] In this embodiment, a connecting hole 74 is opened in the middle of the surface of the limiting piece 73, and the limiting piece 73 is movably connected to the surface of the rotating rod 3 through the inner wall of the connecting hole 74.

[0024] In this embodiment, an avoidance opening 76 is opened at the top of the connecting plate 72. Since the internal space of the plastic case circuit breaker is narrow, in order to prevent interference with the use of other components, the avoidance opening 76 is provided. A fixing hole 75 is opened in the middle of the surface of the fixed seat 71. The fixed seat is fixed through the fixing hole 75, effectively preventing the position deviation of the limiting piece 73 caused by the vibration during the rotation of the moving contact 6, and losing its function of preventing the moving contact 6 from shaking left and right.

[0025] In this embodiment, the moving contact seat 7 adopts an integrally formed structural design, and its structural design increases the connection strength of the moving contact seat 7.

[0026] In this embodiment, clamping grooves 51 are opened on both sides of the surface of the fixed rod 5, and a spring 4 is clamped in the clamping grooves 51, effectively preventing the spring 4 from detaching under its own elasticity.

[0027] The above content is a further detailed description of the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. A moving contact assembly of a molded case circuit breaker, comprising a clamping plate assembly (1), characterized in that: The clamping plate assembly (1) comprises a clamping plate (2), a rotating rod (3), a fixed rod (5) and a spring (4); two clamping plates (2) are sleeved on the surface of the rotating rod (3); the fixed rod (5) is fixedly installed on the top and bottom surfaces of the rear end of the clamping plate (2); the two fixed rods (5) are connected by a spring (4); a moving contact (6) and a moving contact seat (7) are arranged on the surface of the rotating rod (3) between the two clamping plates (2), and the moving contact seat (7) is located on both sides of the moving contact (6).

2. The moving contact assembly of a molded case circuit breaker according to claim 1, characterized in that: The movable contact seat (7) comprises a fixed seat (71), a connecting plate (72) and a limiting plate (73); one end surface of the fixed seat (71) is vertically fixedly connected to the connecting plate (72); the surface of the connecting plate (72) away from one end of the fixed seat (71) is symmetrically fixedly connected to the limiting plate (73); and the limiting plates (73) are arranged on both sides of the movable contact (6).

3. The moving contact assembly of a molded case circuit breaker according to claim 2, characterized in that: A connecting hole (74) is provided in the middle of the surface of the limiting plate (73), and the limiting plate (73) is movably connected to the surface of the rotating rod (3) through the inner wall of the connecting hole (74).

4. The moving contact assembly of a molded case circuit breaker according to claim 2, characterized in that: The top of the connecting plate (72) is provided with an escape opening (76), and the middle of the surface of the fixing seat (71) is provided with a fixing hole (75).

5. The moving contact assembly of a molded case circuit breaker according to claim 2, characterized in that: The moving contact seat (7) adopts an integrally formed structure design.

6. The moving contact assembly of a molded case circuit breaker according to claim 1, characterized in that: The fixing rod (5) has clamping grooves (51) on both sides of its surface, and a spring (4) is clamped in the clamping groove (51).

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