Moving contact rotating shaft mechanism with baffle plate and circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and particularly discloses a moving contact rotating shaft mechanism with a baffle plate and a circuit breaker, the moving contact rotating shaft mechanism is used for being installed on a base of the circuit breaker, the moving contact rotating shaft mechanism comprises a rotating shaft, a driving part is arranged on the rotating shaft, and a moving contact connected with the rotating shaft is installed in the driving part. The driving part drives the moving contact to swing, two sides, corresponding to the moving contact, of the driving part extend to form baffle plates respectively, and the baffle plates are used for isolating and blocking electric arcs generated by opening and closing of the moving contact so as to prevent the electric arcs from being splashed to the side wall of a base of the circuit breaker. According to the utility model, the moving contact is separated from the side wall of the base through the baffle plate, so that electric arc is isolated and blocked, the burning damage degree of the electric arc to the side wall of the base is reduced, and the insulating property of the circuit breaker after short circuit is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a movable contact rotating shaft mechanism with baffle and circuit breaker. BACKGROUND

[0002] The movable contact of the existing circuit breaker disclosed by the publication number CN115513014A is protruded outside the driving part, so that there is no any partition between the movable contact and the side wall of the base, and because the distance between the movable contact and the side wall is close, when the driving part drives the movable contact to swing and the movable contact is in contact with the static contact to realize the opening and closing of the circuit breaker, the electric arc generated is easy to splash on the side wall of the base, thereby causing burning damage to the side wall and reducing the insulation performance of the product. SUMMARY

[0003] The utility model aims at providing a movable contact rotating shaft mechanism with baffle to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a movable contact rotating shaft mechanism with baffle is used for being installed on the base of a circuit breaker, comprising a rotating shaft, a driving part is arranged on the rotating shaft, a movable contact connected with the rotating shaft is installed in the driving part, the driving part drives the movable contact to swing, and baffles are respectively formed on the driving part corresponding to the two sides of the movable contact, the baffles are used for isolating and blocking the electric arc generated by the opening and closing of the movable contact to avoid the electric arc splashing on the side wall of the base of the circuit breaker.

[0005] Preferably, the axis direction of the rotating shaft is defined as the first direction, the first direction is perpendicular to the swinging direction of the movable contact, and the movable contact is shielded and covered by the baffle in the visual angle of the first direction.

[0006] Preferably, the driving part and the movable contact are both multiple, the multiple driving parts are arranged side by side on the same side of the rotating shaft, and the movable contact is installed in the driving part one by one.

[0007] Preferably, the movable contact is fixed or hinged on the rotating shaft.

[0008] The utility model also provides a circuit breaker, which comprises the movable contact rotating shaft mechanism with baffle and the base as described above, a plurality of vertical side walls are arranged side by side on the base, an arc extinguishing chamber is formed between the two adjacent side walls, the movable contact rotating shaft mechanism is rotatably arranged on the base, the driving part is movably arranged in the arc extinguishing chamber, and the baffle is located between the movable contact and the side wall.

[0009] Preferably, the utility model further comprises a static contact installed in the arc extinguishing chamber, and the movable contact and the static contact are movably contacted and matched to realize the opening and closing.

[0010] The utility model has the following beneficial effects:

[0011] The utility model discloses a rotating shaft, rotating shaft is provided with the drive part on it, install the moving contact with rotating shaft connection in the drive part, and the drive part drives moving contact to swing action, and the both sides of drive part correspond to moving contact respectively and extend and form the baffle, and the baffle is used for isolating and blocking the electric arc produced when moving contact opens and closes to avoid its splashing on the side wall of the base of circuit breaker, that is, through the baffle, moving contact is separated from the side wall of base, thereby isolating and blocking the electric arc, reduce the burning damage degree of electric arc to the side wall of base, and further ensure the insulation performance of circuit breaker after short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of moving contact rotating shaft mechanism with baffle of the utility model embodiment.

[0013] Figure 2 It is the appearance schematic diagram of circuit breaker of the utility model embodiment.

[0014] Figure 3 It is Figure 2 The sectional view of A in Fig.

[0015] Figure 4 It is Figure 2 The sectional view of B in Fig.

[0016] Fig. 1 rotating shaft, 2 drive part, 3 baffle, 4 moving contact, 5 base, 6 side wall, 7 arc extinguishing chamber, 8 static contact. DETAILED DESCRIPTION

[0017] To further illustrate the various embodiments, the utility model provides the drawing. These drawings are part of the utility model disclosure, which is mainly used to illustrate the embodiment, and can cooperate with the relevant description of the specification to explain the operation principle of the embodiment. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model. The components in the drawing are not drawn according to the scale, and similar component symbols are usually used to represent similar components.

[0018] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two; The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawing, which is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connects", "connects" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connects, can be mechanical connection, also can be electrical connection, can be direct connection, also can through the indirect connection of intermediate medium.

[0020] Reference Figure 1 As shown in the utility model, as an embodiment of the utility model, a movable contact rotating shaft mechanism with a baffle is provided for mounting on the base 5 of a circuit breaker, comprising a rotating shaft 1, a driving part 2 is arranged on the rotating shaft 1, a movable contact 4 connected with the rotating shaft 1 is installed in the driving part 2, the driving part 2 drives the movable contact 4 to swing, baffles 3 are formed on both sides of the driving part 2 corresponding to the movable contact 4, the baffles 3 are used to isolate and block the arc generated by the opening and closing of the movable contact 4 to avoid spattering on the side wall 6 of the base 5 of the circuit breaker, that is, the movable contact 4 is separated from the side wall 6 of the base 5 by the baffles 3, so as to isolate and block the arc, reduce the burning damage degree of the arc to the side wall 6 of the base 5, and further ensure the insulation performance of the circuit breaker after short circuit.

[0021] In the embodiment, the axis direction of the rotating shaft 1 is defined as the first direction, the first direction is perpendicular to the swing direction of the movable contact 4, and the movable contact 4 is covered by the baffle 3 in the visual angle of the first direction; since the movable contact 4 and the static contact 8 are in active contact to realize opening and closing, the swing direction of the movable contact 4 is the direction of opening and closing, and correspondingly, the arc generated by the movable contact 4 spatters to both sides of the first direction, so that the baffle 3 can fully and effectively isolate and block the arc, and the protection effect of the side wall 6 of the base 5 is further improved.

[0022] In the embodiment, the driving part 2 and the movable contact 4 are both multiple, the multiple driving parts 2 are arranged side by side on the same side of the rotating shaft 1, and the movable contact 4 is installed in the driving part 2 one by one, so that the multiple driving parts 2 can synchronously drive the multiple movable contacts 4 to swing to realize opening and closing, and ensure the safe and stable operation of the circuit breaker. Among them, the movable contact 4 is fixed or hinged on the rotating shaft 1, which ensures the stability of the connection.

[0023] Reference Figures 2-4The utility model discloses still provide a circuit breaker, including the movable contact rotating shaft mechanism with the baffle of above-mentioned embodiment and base 5, base 5 is provided with multiple vertical side wall 6 side by side, and the arc extinguishing chamber 7 is formed between the adjacent two side wall 6, movable contact rotating shaft mechanism rotation is arranged on base 5, and drive part 2 is movably arranged in arc extinguishing chamber 7, and the baffle 3 is located between movable contact 4 and side wall 6, still include the fixed contact 8 of installing in arc extinguishing chamber 7, and movable contact 4 and fixed contact 8 movable contact cooperation is carried out to realize opening and closing when movable contact 4 and fixed contact 8 movable contact cooperation is carried out opening and closing, and the arc produced when opening and closing can be isolated and blocked by baffle 3 to avoid its spatter on the side wall 6 of the base 5 of circuit breaker, reduce the damage degree of base 5, and then ensure the insulation performance of circuit breaker after short circuit.

[0024] Wherein, the circuit breaker of movable contact rotating shaft mechanism with or without baffle carries out short circuit test, and its result is as follows:

[0025] The circuit breaker of movable contact rotating shaft mechanism without baffle: under the action of electric repulsion, movable contact and fixed contact 8 will repel, thereby generating high-temperature arc and spattering in each direction, when the two sides of movable contact 4 are without baffle 3, the arc will spatter on the side wall 6 of base 5, and the side wall 6 of base 5 will be partially carbonized and filled with conductive particles, which will cause the withstand voltage breakdown between the incoming and outgoing lines during the withstand voltage verification after short circuit.

[0026] The circuit breaker of movable contact rotating shaft mechanism with baffle: under the action of electric repulsion, movable contact and fixed contact 8 will repel, thereby generating high-temperature arc and spattering in each direction, when short circuit, the arc will spatter on the baffle 3, thereby isolating the arc from the side wall 6 of base 5, preventing the arc from spattering on the side wall 6 of base 5, so that the withstand voltage between the incoming and outgoing lines after short circuit is qualified, the withstand voltage of the product after short circuit test meets the requirements, and the short circuit performance of the product meets the requirements.

[0027] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the utility model in form and detail without departing from the spirit and scope of the utility model defined by the appended claims, and all fall within the protection scope of the utility model.

Claims

1. A moving contact shaft mechanism with a baffle, for mounting on the base of a circuit breaker, characterized in that: It includes a rotating shaft, on which a driving unit is provided. A moving contact connected to the rotating shaft is installed in the driving unit. The driving unit drives the moving contact to swing. Baffles extend from the driving unit on both sides corresponding to the moving contact. The baffles are used to isolate and block the electric arc generated by the opening and closing of the moving contact to prevent it from splashing onto the side wall of the circuit breaker base.

2. The moving contact shaft mechanism with a baffle according to claim 1, characterized in that: Define the axis direction of the rotating shaft as the first direction. The first direction is perpendicular to the swing direction of the moving contact. From the perspective of the first direction, the baffle will block and cover the moving contact.

3. The moving contact shaft mechanism with a baffle according to claim 1, characterized in that: There are multiple driving units and multiple moving contacts. The multiple driving units are arranged side by side on the same side of the rotating shaft, and the moving contacts are installed one by one in the driving units.

4. The moving contact shaft mechanism with a baffle according to claim 1, characterized in that: The moving contact is either fixedly or hinged to the rotating shaft.

5. A circuit breaker, characterized in that: The invention includes the moving contact rotating shaft mechanism with baffle and the base as described in any one of claims 1-4. The base has a plurality of vertical sidewalls arranged side by side, and an arc-extinguishing chamber is formed between two adjacent sidewalls. The moving contact rotating shaft mechanism is rotatably mounted on the base, the driving part is movably mounted in the arc-extinguishing chamber, and the baffle is located between the moving contact and the sidewall.

6. The circuit breaker according to claim 5, characterized in that: It also includes stationary contacts installed in the arc-extinguishing chamber, with moving contacts engaging with stationary contacts to achieve opening and closing.

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