Intelligent universal circuit breaker

Abstract

The utility model discloses an intelligent universal circuit breaker, which relates to the field of circuit breakers and comprises a front shell, a base, a rear shell and a handle, an operating mechanism and a tripping assembly are arranged in the front shell, an arc extinguish chamber and a linkage mechanism are arranged in the base, a contact, a run-on plate and an angle plate which are fixedly mounted are arranged on the rear shell, and the handle is arranged on the rear shell. The contact is clamped by the run-on plate and the angle plate, a fastening assembly for elastically connecting the run-on plate, the angle plate and the contact is arranged among the run-on plate, the angle plate and the contact, and the run-on plate is in surface contact with the contact. The utility model has the advantage of good working stability.

Description

A smart universal circuit breaker Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to an intelligent universal circuit breaker. Background Technology

[0002] Existing intelligent universal circuit breakers, such as the one disclosed in CN207542157U on June 26, 2018, have an arc-starting plate whose bottom end is connected to the second contact via a positioning structure. The positioning structure includes a corner plate and a bolt assembly. The bolts pass through the arc-starting plate, the second contact, and the corner plate from top to bottom and are then locked by nuts. The corner plate is L-shaped, with one end fixed to the bottom surface of the second contact and the other end fixed to the rear cover via a positioning bolt. However, this structure is very unstable. In a vibration environment, when the bolts between the second contact and the arc-starting plate loosen, the second contact and the arc-starting plate are prone to detachment, resulting in poor operational stability. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides an intelligent universal circuit breaker with good operational stability.

[0004] The technical solution adopted by this utility model is as follows: an intelligent universal circuit breaker, including a front housing, a base, a rear housing and a handle. The front housing is provided with an operating mechanism and a tripping assembly. The base is provided with an arc-extinguishing chamber and a linkage mechanism. The rear housing is provided with a fixedly installed contact, an arc-inducing plate and an angle plate. The contact is clamped by the arc-inducing plate and the angle plate and a fastening assembly that elastically connects the three is provided. The arc-inducing plate and the contact are in surface contact.

[0005] The fastening assembly includes:

[0006] A clamp is disposed between the corner plate and the contact;

[0007] An elastic element is abutting between the clamp and the contact sidewall;

[0008] The first bolt and nut, which pass through the arc-starting plate, contact, elastic element, clamp and angle plate in sequence, are threaded together.

[0009] An elastic washer is provided between the first bolt and the arc-starting plate.

[0010] The surfaces of the clamp and the contact are provided with receiving grooves for placing the elastic element.

[0011] The elastic element is a spring.

[0012] The bottom rear end of the arc-guiding plate has a folded mounting part, and a second bolt is provided between the mounting part and the rear housing to fix the two together.

[0013] A third bolt is provided to fix the corner plate and the rear housing together.

[0014] The tripping assembly includes a closed trip unit, a shunt trip unit, and an undervoltage trip unit.

[0015] The beneficial effects of this utility model are: by setting up a fastening assembly of elastic connecting contact, arc-inducing plate and corner plate, and by using surface contact between the arc-inducing plate and the contact, even if the bolts are slightly loose in a vibration environment, the arc-inducing plate and the contact will still maintain surface contact through elastic pre-tightening force, thus ensuring working stability. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of the intelligent universal circuit breaker according to an embodiment of this utility model.

[0017] Figure 2 is a schematic diagram of the internal structure of an intelligent universal circuit breaker.

[0018] Figure 3 is a magnified view of part A in Figure 2. Detailed Implementation

[0019] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0020] As shown in the figure, an intelligent universal circuit breaker includes a front housing 1, a base 2, a rear housing 3, and a handle 4. The front housing 1 houses an operating mechanism 5 and a tripping assembly. The base 2 houses an arc-extinguishing chamber 6 and a linkage mechanism 7. The rear housing 3 has a fixedly installed contact 8, an arc-starting plate 9, and a corner plate 10. The contact 8 is clamped by the arc-starting plate 9 and the corner plate 10, and the three are connected by an elastic fastening assembly. The arc-starting plate 9 and the contact 8 are in surface contact. This technical solution ensures operational stability by setting an elastic fastening assembly connecting the contact, the arc-starting plate, and the corner plate, and by using surface contact between the arc-starting plate and the contact. Even if the bolts loosen slightly in a vibration environment, the arc-starting plate and the contact will still maintain surface contact through elastic preload.

[0021] The fastening assembly includes:

[0022] Clamp 11 is disposed between the corner plate 10 and the contact 8;

[0023] The elastic element 12 is abutting between the clamp 11 and the side wall of the contact 8;

[0024] The first bolt 13 and nut 14 pass through the arc-inducing plate 9, contact 8, elastic element 12, clamp 11 and angle plate 10 in sequence and are threaded together. The elastic element 12 is a spring. The spring is clamped by the clamp and contact and is always in a compressed state. The contact always has an elastic preload to keep it in close contact with the arc-inducing plate and maintain surface contact.

[0025] An elastic washer 15 is provided between the first bolt 13 and the arc-starting plate 9. The spring washer uses elastic deformation to generate a reverse force to resist the loosening of the threaded connection caused by vibration.

[0026] The clamp 11 and the contact 8 are provided with receiving grooves 16 on their opposing surfaces for placing the elastic element 12. The receiving grooves can prevent the spring from dislodging between the clamp and the contact.

[0027] The bottom rear end of the arc-guiding plate 9 has a folded mounting part 17. A second bolt 18 is provided between the mounting part 17 and the rear housing 3 to fix the two together. A third bolt 19 is provided between the corner plate 10 and the rear housing 3 to fix the two together. It is not easy to fall off and has a long service life.

[0028] The tripping assembly includes a closed trip unit 20, a shunt trip unit 21, and an undervoltage trip unit 22.

[0029] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this patent.

Claims

1. An intelligent universal circuit breaker, comprising a front housing (1), a base (2), a rear housing (3), and a handle (4), wherein the front housing (1) is provided with an operating mechanism (5) and a tripping assembly, and the base (2) is provided with an arc-extinguishing chamber (6) and a linkage mechanism (7), characterized in that: The rear housing (3) is provided with a fixedly installed contact (8), an arc-guiding plate (9) and a corner plate (10). The contact (8) is clamped by the arc-guiding plate (9) and the corner plate (10), and a fastening component that elastically connects the three is provided between them. The arc-guiding plate (9) and the contact (8) are in surface contact.

2. The intelligent universal circuit breaker according to claim 1, characterized in that: The fastening assembly includes: a clamp (11) disposed between the corner plate (10) and the contact (8); an elastic element (12) abutting between the clamp (11) and the side wall of the contact (8); a first bolt (13) and a nut (14) that pass through the arc-inducing plate (9), the contact (8), the elastic element (12), the clamp (11) and the corner plate (10) in sequence and are threaded together.

3. The intelligent universal circuit breaker according to claim 2, characterized in that: An elastic washer (15) is provided between the first bolt (13) and the arc-starting plate (9).

4. The intelligent universal circuit breaker according to claim 2, characterized in that: The clamp (11) and the contact (8) are provided with receiving grooves (16) for placing the elastic element (12) on their opposite surfaces.

5. The intelligent universal circuit breaker according to claim 2, characterized in that: The elastic element (12) is a spring.

6. The intelligent universal circuit breaker according to claim 1, characterized in that: The bottom rear end of the arc-inducing plate (9) has a folded mounting part (17), and a second bolt (18) is provided between the mounting part (17) and the rear housing (3) to fix the two together.

7. The intelligent universal circuit breaker according to claim 1, characterized in that: A third bolt (19) is provided between the corner plate (10) and the rear housing (3) to fix the two together.

8. The intelligent universal circuit breaker according to claim 1, characterized in that: The tripping assembly includes a closed trip unit (20), a shunt trip unit (21), and an undervoltage trip unit (22).

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