Magnetic tripping device of molded case circuit breaker

Abstract

The utility model discloses a magnetic tripping device of a molded case circuit breaker, which comprises a base and two fixing plates fixedly connected in the base, three mounting cavities are formed in the base through the fixing plates, and tripping assemblies are arranged in the mounting cavities. The device is characterized in that fixing blocks are fixedly connected to the two sides of the inner wall of each mounting cavity, connecting positions are formed in the tops of the fixing blocks, connecting shafts are clamped in the connecting positions, the tripping assembly comprises a first rotating plate and a second rotating plate, connecting blocks are fixedly connected to the two sides of the top of the first rotating plate and the two sides of the top of the second rotating plate, and the connecting shafts are clamped in the connecting shafts. A connecting hole is formed in the surface of the connecting block and rotationally connected with the outer wall of the connecting shaft. By arranging the connecting shaft, the tripping assembly can rotate on the connecting shaft, so that a traditional structural mode is replaced, the swing angle of the tripping assembly is not limited due to the structural design, the magnetic tripping capacity of the molded case circuit breaker is improved, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a magnetic tripping device for a molded case circuit breaker. Background Art

[0002] Circuit breakers are widely used products as overload, short circuit and undervoltage protection devices in low-voltage power distribution systems and motor protection circuits. The structure of a circuit breaker generally consists of a contact system, an arc extinguishing device, an operating mechanism, a tripping device, a plastic casing and optional accessories. The contact system includes moving and static contacts connected in pairs in the line. When the line where the circuit breaker is located has an overload, short circuit, undervoltage or other faults, the moving and static contacts are opened within a specified time to cut off the line and protect the line and power supply equipment from damage; the arc extinguishing device is used to extinguish the arc generated when the moving and static contacts are opened; the tripping device includes a thermal tripping device, an electromagnetic tripping mechanism, and an undervoltage tripping mechanism; when a short circuit occurs in the line, the short-circuit current flows through the tripping device, the magnetic tripping mechanism is activated, the operating mechanism is tripped, and the circuit breaker trips, thereby protecting the line and load where the circuit breaker is located.

[0003] Existing molded case circuit breaker manufacturers install the magnetic trip device by opening a connection position on the inner wall of each installation cavity in the base when manufacturing molded case circuit breakers. The magnetic trip device is clamped through the connection position. This design can reduce costs while also limiting the swing angle of the trip device during the attraction process. The occurrence of this phenomenon makes it impossible to realize the tripping function in the molded case circuit breaker, affecting normal and safe use. Summary of the invention

[0004] The purpose of the utility model is to provide a magnetic tripping device for a molded case circuit breaker, so as to solve the problem mentioned in the above background technology that when manufacturing the molded case circuit breaker, the existing molded case circuit breaker manufacturers install the magnetic tripping device by opening a connection position on the inner wall of each installation cavity in the base, and clamping the magnetic tripping device through the connection position. Its design can reduce costs while also limiting the swing angle of the tripping device during the attraction process. The occurrence of this phenomenon makes it impossible to realize the tripping function in the molded case circuit breaker, affecting normal and safe use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a magnetic tripping device for a molded case circuit breaker, comprising a base and two fixed plates fixedly connected inside the base, and three mounting cavities are formed in the base through the fixed plates, and a tripping assembly is arranged in the mounting cavity, characterized in that: fixed blocks are fixedly connected on both sides of the inner wall of each mounting cavity, a connecting position is provided on the top of the fixed block, a connecting shaft is clamped in the connecting position, the tripping assembly comprises a first rotating plate and a second rotating plate, connecting blocks are fixedly connected on both sides of the top of the first rotating plate and the second rotating plate, a connecting hole is provided on the surface of the connecting block, and the connecting hole is rotatably connected to the outer wall of the connecting shaft.

[0006] Preferably, the tops of the first rotating plate and the second rotating plate are both fixedly connected with connecting rods.

[0007] Preferably, a rotating shaft is rotatably connected to the top of the fixed plate, and connecting plates are fixedly connected to both ends of the rotating shaft.

[0008] Preferably, the rear end surface of the connecting rod is fixedly connected to the front end surface of the connecting plate.

[0009] Preferably, a tripping bracket is installed in the installation cavity, a guide copper plate is arranged in the tripping bracket, and a magnetic tripping plate is arranged between the guide copper plate and the second rotating plate.

[0010] Preferably, a connecting column is fixedly connected to one end of the top of the magnetic trip plate close to the connecting plate, and the end surface of the connecting column abuts against the front end surface of the connecting plate.

[0011] Beneficial Effects

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] By setting a fixed block and a connecting position, a rotating installation position of the connecting shaft is provided. At the same time, by setting the connecting shaft, the trip assembly can be rotated on the connecting shaft, thereby replacing the traditional structural method. The design of the above structure brings about an unrestricted swing angle of the trip assembly, thereby greatly improving the magnetic tripping capacity of the molded case circuit breaker and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 This is a schematic diagram of the base structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the tripping assembly of the utility model;

[0017] Figure 4It is a schematic diagram of the structure of components of the utility model that cooperate with the trip assembly.

[0018] 1. Base; 2. Fixing plate; 3. Installation cavity; 4. Trip bracket; 5. Guide copper plate; 6. Magnetic trip plate;

[0019] 7. Connecting column; 8. Connecting rod; 9. Connecting plate; 10. Tripping assembly; 11. Rotating shaft; 21. Fixed block;

[0020] 22. Connecting position; 23. Connecting shaft; 101. First rotating plate; 102. Second rotating plate; 103. Connecting block;

[0021] 104. Connection hole. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0024] like Figure 1-4It is a structural schematic diagram of a magnetic tripping device of a molded case circuit breaker in a preferred embodiment of the utility model. In this embodiment, a magnetic tripping device of a molded case circuit breaker includes a base 1 and two fixed plates 2 fixedly connected in the base 1, and three mounting cavities 3 are formed in the base 1 through the fixed plates 2. By arranging a tripping assembly 10 in the mounting cavity 3, the important function of the magnetic tripping of the molded case circuit breaker is realized. Fixed blocks 21 are fixedly connected on both sides of the inner wall of each mounting cavity 3. By opening a connection position 22 on the top of the fixed block 21, a tripping assembly 10 is provided in the mounting cavity 3, so that the magnetic tripping of the molded case circuit breaker is realized. A connecting shaft 23 is connected, and the trip assembly 10 includes a first rotating plate 101 and a second rotating plate 102. Connecting blocks 103 are fixedly connected to both sides of the top of the first rotating plate 101 and the second rotating plate 102, and a connecting hole 104 is opened on the surface of the connecting block 103, and the connecting hole 104 is rotatably connected to the outer wall of the connecting shaft 23, so that the trip assembly 10 can rotate on the connecting shaft 23, thereby replacing the traditional structural design, increasing the rotation angle of the trip assembly 10, and is not restricted by the inner wall of the base 1 during the rotation process, thereby improving the tripping capacity of the molded case circuit breaker.

[0025] In this embodiment, a connecting rod 8 is fixedly connected to the top of the first rotating plate 101 and the top of the second rotating plate 102 .

[0026] In this embodiment, a rotating shaft 11 is rotatably connected to the top of the fixed plate 2, and the opening and closing functions of the molded case circuit breaker are realized by the rotation of the rotating shaft 11. The two ends of the rotating shaft 11 are fixedly connected to connecting plates 9.

[0027] In this embodiment, the rear end face of the connecting rod 8 is fixedly connected to the front end face of the connecting plate 9, thereby realizing the rotation of the trip assembly 10, driving the rotation of the rotating shaft 11, and realizing the opening function of the molded case circuit breaker.

[0028] In this embodiment, a trip bracket 4 is installed in the installation cavity 3, and a guide copper plate 5 is arranged in the trip bracket 4. The guide copper plate 5 is used to realize the function of conducting current. A magnetic trip plate 6 is arranged between the guide copper plate 5 and the second rotating plate 102. The conduction current of the guide copper plate 5 is transmitted to the magnetic trip plate 6 to generate suction, thereby driving the rotation of the trip assembly 10.

[0029] In this embodiment, a connecting column 7 is fixedly connected to one end of the top of the magnetic trip plate 6 close to the connecting plate 9 , and the end surface of the connecting column 7 abuts against the front end surface of the connecting plate 9 .

[0030] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A magnetic tripping device for a molded case circuit breaker, comprising a base (1) and two fixing plates (2) fixedly connected to the base (1), wherein three mounting cavities (3) are formed in the base (1) through the fixing plates (2), wherein a tripping assembly (10) is arranged in the mounting cavity (3), characterized in that: A fixing block (21) is fixedly connected to both sides of the inner wall of each installation cavity (3); a connecting position (22) is provided on the top of the fixing block (21); a connecting shaft (23) is clamped in the connecting position (22); the release assembly (10) comprises a first rotating plate (101) and a second rotating plate (102); connecting blocks (103) are fixedly connected to both sides of the top of the first rotating plate (101) and the second rotating plate (102); a connecting hole (104) is provided on the surface of the connecting block (103); and the connecting hole (104) is rotatably connected to the outer wall of the connecting shaft (23).

2. The magnetic tripping device of a molded case circuit breaker according to claim 1, characterized in that: The tops of the first rotating plate (101) and the second rotating plate (102) are both fixedly connected with connecting rods (8).

3. The magnetic tripping device of a molded case circuit breaker according to claim 1, characterized in that: The top of the fixed plate (2) is rotatably connected to a rotating shaft (11), and both ends of the rotating shaft (11) are fixedly connected to connecting plates (9).

4. The magnetic tripping device of a molded case circuit breaker according to claim 2, characterized in that: The rear end surface of the connecting rod (8) is fixedly connected to the front end surface of the connecting plate (9).

5. The magnetic tripping device of a molded case circuit breaker according to claim 1, characterized in that: A trip bracket (4) is installed in the installation cavity (3), a guide copper plate (5) is arranged in the trip bracket (4), and a magnetic trip plate (6) is arranged between the guide copper plate (5) and the second rotating plate (102).

6. A magnetic tripping device for a molded case circuit breaker according to claim 5, characterized in that: A connecting column (7) is fixedly connected to one end of the top of the magnetic release plate (6) close to the connecting plate (9), and the end surface of the connecting column (7) abuts against the front end surface of the connecting plate (9).

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