Energy-storage rapid switching-on mechanism of circuit breaker

Abstract

The utility model discloses an energy storage fast switching-on mechanism of a circuit breaker, which comprises a shell, a handle, an energy storage limiting piece, a static contact supporting piece, a moving contact supporting piece and a tripping mechanism, the handle and the moving contact supporting piece are rotatably arranged in the shell, and the handle is rotated to enable the moving contact supporting piece and the static contact supporting piece to be matched to realize switching-on and switching-off. An installation area located between the handle and the moving contact supporting piece is arranged in the shell, the energy storage limiting piece slides and is limited in the installation area, the handle is provided with a moving area, the moving contact supporting piece is provided with an abutting portion, and the energy storage limiting piece is provided with a moving portion limited in the moving area and a matching portion. According to the utility model, the energy storage limiting piece adopts a sliding mode, so that the matching part can be easily pulled away from the abutting part, the stored energy can be instantly released when the energy storage limiting piece is transiently contacted with the abutting part, rapid closing is realized, the closing hand feeling is good, and the operation is easy and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an energy storage fast closing mechanism of a circuit breaker. Background Art

[0002] Circuit breaker: A mechanical switch that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain period of time and automatically disconnect current under specified abnormal circuit conditions, such as short-circuit current. The function of a circuit breaker is well known in the industry. Under normal conditions, it ensures the smooth flow of the electrical circuit; when a circuit fails and a short-circuit current is generated or an overcurrent is caused by an overload, the electrical load is separated from the power supply network.

[0003] The prior application Chinese patent number CN202020087765.4 discloses an energy storage fast closing mechanism for a small circuit breaker, including a shell, a handle, an energy storage limiter, and a moving contact support. The handle and the energy storage limiter are coaxially rotatably arranged on the shell, the handle is provided with a driving part and a first contact surface, the energy storage limiter is provided with an arc limiter surface, the moving contact support is provided with a second contact surface, a first elastic part is provided on one side of the energy storage limiter, and a stop protrusion is provided on the other side of the energy storage limiter on the shell. The energy storage limiter has a boss extending in the direction of the stop protrusion, and a second elastic part also extends on the boss. When the boss conflicts with the stop protrusion, the second elastic part is clamped on the stop protrusion to limit the energy storage limiter from rotating without being driven by the handle during the closing process.

[0004] The problems existing in the above patent are as follows: during the closing process, the arc limit surface of the energy storage limit member and the second contact surface of the moving contact support member directly contact each other. After a short pause, the moving contact support member quickly moves forward, thereby driving the moving contact to close quickly. Due to the rotational coordination of the two, the deviation is large during short-term contact energy storage, which is easy to cause misaligned contact and cannot store energy well; and the structure is complex, requiring more accessories to achieve the energy storage effect; the production cost is high and the efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an energy storage fast closing mechanism for a circuit breaker.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an energy storage fast closing mechanism of a circuit breaker, comprising a shell, a handle, an energy storage limiter, a static contact support, a moving contact support and a tripping mechanism, wherein the handle and the moving contact support are rotatably arranged in the shell and a linkage member is arranged between the two, an elastic reset member for energy storage is arranged between the shell and the moving contact support, the handle is rotated to make the contact parts of the moving contact support and the static contact support contact or separate to realize opening and closing, an installation area located between the handle and the moving contact support is arranged in the shell, the energy storage limiter slides and is limited in the installation area, an active area is arranged on the handle, an abutment portion is arranged on the moving contact support, the energy storage limiter has a moving portion and a matching portion limited in the active area, the matching portion is located on the rotation path of the abutment portion and the matching portion is quickly staggered after briefly abutting against the abutment portion during the closing process of the handle.

[0007] As a preferred technical solution of the utility model, the energy storage limiter includes a main body, the moving part and the matching part are located at both ends of the main body, the energy storage limiter also includes an elastic part located below the main body, an upper blocking part and a lower blocking part are arranged at positions corresponding to the installation area in the shell, the energy storage limiter slides and is limited between the upper blocking part and the lower blocking part, the upper blocking part is located above the main body, and the elastic part is mounted on the lower blocking part.

[0008] As a preferred technical solution of the utility model, the elastic part includes an arched elastic section, one end of the elastic section is fixedly connected to the main body, the other end of the elastic section serves as a movable end and a spherical limit block is provided at the movable end, the lower blocking part is located on one side of the moving contact support and a limit groove is provided, and the spherical limit block is stuck in the limit groove when the handle is in the initial position of the switch-off.

[0009] As a preferred technical solution of the utility model, a side plate is arranged in the housing at a position corresponding to the installation area, and the side plate is arranged close to one side of the handle. When the handle is in the closing position, one end of the elastic part abuts against the side plate.

[0010] As a preferred technical solution of the utility model, the activity area is an oblong hole or an arc-shaped hole opened on the handle.

[0011] As a preferred technical solution of the utility model, a first limit surface and a second limit surface are provided in the shell and are located on both sides of the handle. The first limit surface and the second limit surface are located on the rotation path of the handle, and the handle is respectively against the first limit surface or the second limit surface when it is in the closing or opening position.

[0012] In summary, the beneficial effects of the utility model are:

[0013] 1. The short contact between the matching part of the energy storage limiter and the abutment part of the moving contact support can achieve good energy storage, without more accessories and simplified structure. In addition, the energy storage limiter adopts a sliding method, which can easily pull the matching part away from the abutment part, and the short contact energy storage is released instantly, so as to achieve fast closing, good closing feel, and easy and labor-saving.

[0014] 2. When the small circuit breaker is closed, the moving contact, under the action of the handle, makes the moving contact and the static contact close quickly and stably in an instant;

[0015] 3. Due to the effect of energy storage, no arc will be generated between the moving contact on the moving contact support and the static contact on the static contact support when closing the circuit, so that the moving and static contacts will not be burned by the arc when closing the circuit, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the circuit breaker of the utility model in the open state;

[0017] Figure 2 It is a schematic diagram of the internal structure of the circuit breaker of the utility model in the closed state;

[0018] Figure 3 yes Figure 1 Enlarged view of part A;

[0019] Figure 4 yes Figure 2 Enlarged view of part B;

[0020] Figure 5 It is a schematic diagram of the structure inside the shell of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the handle in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the energy storage limiter in the utility model.

[0023] Figure numerals: 1. Shell; 11. Installation area; 111. Upper blocking part; 112. Lower blocking part; 1121. Limiting groove; 113. Side plate; 12. First limiting surface; 13. Second limiting surface; 2. Handle; 21. Active area; 3. Energy storage limiting member; 31. Moving part; 32. Matching part; 33. Main body; 34. Elastic part; 341. Elastic section; 3411. Spherical limiting block; 4. Static contact support member; 5. Moving contact support member; 51. Abutment part; 6. Release mechanism; 7. Linkage member; 8. Elastic reset member. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0025] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0026] like Figure 1-7 The energy storage fast closing mechanism of a circuit breaker shown in the figure includes a housing 1, a handle 2, an energy storage limiter 3, a static contact support 4, a moving contact support 5 and a tripping mechanism 6 (not shown in the figure, this is the prior art so it is not described in detail), the handle 2 and the moving contact support 5 are rotatably arranged in the housing 1 and a linkage member 7 is arranged between the two (how the handle 2 and the moving contact are linked is not the focus of this application, this is the prior art so it is not described in detail), an elastic reset member 8 for energy storage is arranged between the housing 1 and the moving contact support 5 (a torsion spring or a spring can be used, the specific installation method is the prior art, and this application will not be described in detail), The handle 2 is rotated to make the moving contact support 5 and the static contact support 4 cooperate to realize opening and closing. An installation area 11 located between the handle 2 and the moving contact support 5 is provided in the shell 1. The energy storage limiter 3 slides and is limited in the installation area 11. An active area 21 is provided on the handle 2, and an abutment portion 51 is provided on the moving contact support 5. The energy storage limiter 3 has a moving portion 31 and a matching portion 32 limited in the active area 21. The matching portion 32 is located on the rotation path of the abutment portion 51 and the matching portion 32 is staggered after briefly abutting against the abutment portion 51 to store energy during the closing process of the handle 2. In this embodiment, the active area 21 is an oblong hole or an arc hole opened on the handle 2.

[0027] The matching part 32 of the energy storage limiter 3 and the abutment part 51 of the moving contact support 5 can achieve good energy storage through brief contact, without more accessories and simplified structure. In addition, the energy storage limiter 3 adopts a sliding manner, which can easily pull the matching part 32 away from the abutment part 51. After brief contact, the energy stored in the moving contact support is released instantly, so as to achieve fast closing, good closing feel, and easy and labor-saving. When the small circuit breaker is closed, the moving contact makes the moving contact and the static contact contact and close quickly and stably in an instant under the action of the handle 2. Due to the effect of energy storage, no arc will be generated between the moving contact on the moving contact support 5 and the static contact on the static contact support 4 when closing, so that the moving and static contacts will not be burned by the arc when closing, and the service life is long.

[0028] The energy storage limiter 3 includes a main body 33, a movable part 31 and a matching part 32 located at both ends of the main body 33, and the energy storage limiter 3 also includes an elastic part 34 located below the main body 33. An upper blocking part 111 and a lower blocking part 112 are arranged at a position corresponding to the installation area 11 in the shell 1. The energy storage limiter 3 slides and is limited between the upper blocking part 111 and the lower blocking part 112. The upper blocking part 111 is located above the main body 33, and the elastic part 34 is mounted on the lower blocking part 112.

[0029] The elastic portion 34 includes an arched elastic section 341, one end of the elastic section 341 is fixedly connected to the main body 33, the other end of the elastic section 341 serves as a movable end and a spherical limit block 3411 is provided at the movable end, and the lower blocking portion 112 is located on one side of the moving contact support 5 and a limit groove 1121 is provided. When the handle 2 is in the initial position of the opening switch, the spherical limit block 3411 is inserted into the limit groove 1121.

[0030] A side plate 113 is disposed in the housing 1 at a position corresponding to the mounting area 11 . The side plate 113 is disposed close to one side of the handle 2 . When the handle 2 is in the closing position, one end of the elastic portion 34 abuts against the side plate 113 .

[0031] A first limit surface 12 and a second limit surface 13 are provided in the shell 1 on both sides of the handle 2. The first limit surface 12 and the second limit surface 13 are located on the rotation path of the handle 2. When the handle 2 is in the closing position or the opening position, it respectively abuts against the first limit surface 12 or the second limit surface 13.

[0032] Working principle: when the handle 2 is in the initial opening position, the moving part 31 of the energy storage limiter 3 is located at the left end of the active area 21 and the spherical limit block 3411 is stuck in the limit groove 1121. When the handle 2 is in the process of opening and closing, the abutment part 51 of the moving contact support 5 rotates to the bottom of the matching part 32 and abuts against the matching part 32. The moving contact support 5 briefly stops, and the moving contact and the static contact are not in contact and a distance is retained. The handle 2 continues to be rotated until the right end of the active area 21 contacts the moving part 31. The energy storage limiter 3 moves to the left to make the matching part 32 withdraw from the abutment part 51, and the handle 2 is quickly pushed forward to reach the closing position, thereby overcoming the influence of the speed of manual operation of the handle 2 on the closing speed of the moving contact and improving the service life.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An energy storage fast closing mechanism for a circuit breaker, comprising a housing (1), a handle (2), an energy storage limiter (3), a static contact support (4), a moving contact support (5) and a tripping mechanism (6), wherein the handle (2) and the moving contact support (5) are rotatably arranged in the housing (1) and a linkage member (7) is arranged between the two, an elastic reset member (8) for storing energy is arranged between the housing (1) and the moving contact support (5), and the handle (2) is rotated to make the contact points of the moving contact support (5) and the static contact support (4) contact or separate to realize opening and closing, characterized in that: The housing (1) is provided with an installation area (11) located between the handle (2) and the moving contact support (5); the energy storage limiter (3) slides and is limited in the installation area (11); the handle (2) is provided with an active area (21); the moving contact support (5) is provided with an abutment portion (51); the energy storage limiter (3) comprises a moving portion (31) limited in the active area (21) and a matching portion (32); the matching portion (32) is located on the rotation path of the abutment portion (51); and the matching portion (32) is in short contact with the abutment portion (51) during the closing process of the handle (2) and then quickly offsets.

2. The energy storage fast closing mechanism of the circuit breaker according to claim 1, characterized in that: The energy storage limiting component (3) comprises a main body (33), the movable portion (31) and the matching portion (32) are located at two ends of the main body (33), the energy storage limiting component (3) further comprises an elastic portion (34) located below the main body (33), an upper blocking portion (111) and a lower blocking portion (112) are arranged in the housing (1) at a position corresponding to the installation area (11), the energy storage limiting component (3) slides and is limited between the upper blocking portion (111) and the lower blocking portion (112), the upper blocking portion (111) is located above the main body (33), and the elastic portion (34) is mounted on the lower blocking portion (112).

3. The energy storage fast closing mechanism of the circuit breaker according to claim 2, characterized in that: The elastic portion (34) comprises an arched elastic section (341), one end of the elastic section (341) is fixedly connected to the main body (33), the other end of the elastic section (341) serves as a movable end and is provided with a spherical limit block (3411), the lower blocking portion (112) is provided with a limit groove (1121) on one side of the moving contact support (5), and the spherical limit block (3411) is inserted into the limit groove (1121) when the handle (2) is in the initial opening position.

4. The energy storage fast closing mechanism of the circuit breaker according to claim 2 or 3, characterized in that: A side plate (113) is arranged in the housing (1) at a position corresponding to the installation area (11); the side plate (113) is arranged close to one side of the handle (2); and when the handle (2) is in the closing position, one end of the elastic part (34) abuts against the side plate (113).

5. The energy storage fast closing mechanism of the circuit breaker according to claim 1, characterized in that: The activity area (21) is an oblong hole or an arc-shaped hole formed on the handle (2).

6. The energy storage fast closing mechanism of the circuit breaker according to claim 1, characterized in that: A first limiting surface (12) and a second limiting surface (13) are provided in the housing (1) and are located on both sides of the handle (2); the first limiting surface (12) and the second limiting surface (13) are located on the rotation path of the handle (2); when the handle (2) is in the closing position or the opening position, the handle (2) abuts against the first limiting surface (12) or the second limiting surface (13) respectively.

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