CN204792639U - Circuit breaker - Google Patents

Abstract

The utility model discloses a circuit breaker, which comprises a housing formed by connecting a base, a middle cover and an upper cover, and an opening and closing operation device, a main control board, a power board and a zero-sequence transformer installed in the housing; The main control board is fixed on the inner wall of the upper cover, and the middle cover is provided with an accommodating chamber suitable for accommodating the power board, and the power board is arranged at the opening of the accommodating chamber, On it, the transformer is located in the accommodating chamber, and the zero-sequence transformer is arranged in the base, which includes a casing and four transformer coils arranged in the casing, and the casing is connected with the The positions corresponding to the holes in the transformer coils are provided with perforations through which the corresponding phase conductive plates pass. The circuit breaker of the utility model has a reasonable structure and a compact internal structure of the product, which is beneficial to the miniaturization design of the product, facilitates the assembly, reduces the number of parts, and effectively reduces the production cost.

Description

breaker

technical field

The utility model belongs to the field of circuit breaker structure design.

Background technique

A circuit breaker refers to a switching device that can close, carry and break the current under normal circuit conditions, and can close and switch the current under abnormal circuit conditions within a specified time. The main function is to cut off and connect the load circuit. , And cut off the faulty circuit, prevent the accident from expanding, and ensure safe operation. The internal structure of existing circuit breakers is mostly not compact enough, resulting in that the internal space of the product cannot be rationally utilized, and the product volume is relatively large; at the same time, the opening and closing devices in the existing circuit breakers also have deficiencies, such as a patent document CN203966994U discloses a The circuit breaker manual and electric integrated operating device includes an electric operating mechanism and a manual operating mechanism; the electric operating mechanism includes a driving motor, a transmission gear, a fixed plate, a pressure plate, a connecting plate and a ratchet clutch mechanism; The transmission gear, the fixed plate, the pressure plate and the connecting plate on the motor shaft are fixedly connected and can rotate freely relative to the motor shaft; the ratchet clutch mechanism includes a ratchet, a slider and an elastic member; The center of the fixing plate is provided with a circular hole suitable for installing the ratchet, and the ratchet fixed on the motor shaft is located in the circular hole and can rotate synchronously with the motor shaft; the circular There are three assembly grooves suitable for setting the slider and the elastic member in the hole, the angle between adjacent assembly grooves is 120 degrees, and the elastic member and the slider are arranged in the assembly groove , the slider is against the ratchet under the elastic force of the elastic member; the connecting plate is linked with the circuit breaker handle through a connecting rod; the manual operation mechanism includes a fixed frame, a rotating shaft and a driving gear; the rotating shaft It is arranged on the fixed frame and can rotate around its own central axis; the driving gear fixed on the rotating shaft meshes with the transmission gear, and a rotating part suitable for rotating it is formed on the rotating shaft. The problems of the above-mentioned operating device are that the structure is not compact enough and takes up a lot of space, which is not conducive to the miniaturization of the circuit breaker product, and the number of parts is large and the production cost is high.

Utility model content

In this regard, the purpose of the utility model is to provide a circuit breaker with a compact and reasonable structure, which is convenient for assembly.

The technical scheme that realizes the utility model purpose is:

A circuit breaker, comprising a housing connected by a base, a middle cover, and an upper cover, and an opening and closing operation device, a main control board, a power supply board and a zero-sequence transformer installed in the housing; the main control board It is fixed on the inner wall of the upper cover, and the middle cover is provided with an accommodating chamber suitable for accommodating the power board, the power board is arranged at the opening of the accommodating chamber, and the transformer is located on the In the accommodating chamber, the zero-sequence transformer is arranged in the base, which includes a casing and four transformer coils arranged in the casing, and the casing is connected with the transformer coils The positions corresponding to the middle holes are provided with through holes for the corresponding conductive plates to pass through.

In the above technical solution, the opening and closing operation device includes a driving motor, a transmission flywheel, a first connecting rod, a manual rotating shaft, a second connecting rod and a ratchet clutch mechanism; the driving motor is fixed in the fixing groove of the middle seat , the transmission flywheel is sleeved on the output shaft of the driving motor and can rotate freely relative to the output shaft. The ratchet clutch mechanism includes a ratchet, a slider and a return spring. The central hole of the ratchet is set, the ratchet is fixed on the output shaft and is located in the central hole, and the side wall of the central hole is provided with a container suitable for setting the slider and the return spring. Under the action of the return spring, the slider abuts against the ratchet of the ratchet; the eccentric position of the flywheel is connected with one end of the first connecting rod and the second connecting rod through the pin shaft. One end of the rod is hinged, and the other end of the first connecting rod is fixedly connected to the manual shaft rotated on the bracket. The bracket is fixed in an n-shape, and its two ends are fixedly connected to the middle seat. The manual The rotating shaft is arranged coaxially with the output shaft, the other end of the second connecting rod is connected with the handle of the circuit breaker, and the manual rotating shaft has a pulling part which is convenient for turning it.

In the above technical solution, the upper and lower sides of the transmission flywheel are fixed with cover plates closely fitted thereto.

In the above technical solution, the pulling part is an inner hexagon or an outer hexagon structure.

The utility model has positive effects: (1) In the utility model, by fixing the main control board on the upper cover, the power supply board is fixed on the middle cover, and the transformer on the power supply board is placed in the accommodation of the middle cover In the cavity, it is convenient for the wiring operation of the main control board and the power board, and also prevents the related electronic components from being damaged by knocking, and can make the internal structure of the shell compact and reasonable, which is more conducive to the miniaturization design of the product, and at the same time integrates the zero-sequence transformer into one The structure is convenient for assembly and operation, and has a good use effect. (2) In the opening and closing operation device of the circuit breaker of the utility model, the manual operation part and the electric operation part are effectively combined, so that the structure of the operation device is more compact and reasonable, and the space occupied is small, making the volume of the circuit breaker product smaller. It is more miniaturized, and compared with the operating device in the background technology, it saves some parts, effectively reduces the production cost, and has a good use effect; during electric operation, the drive motor drives the ratchet along the first Rotate in one direction, when the ratchet rotates, its upper blocking surface is against the slider to drive the transmission flywheel to rotate, and then drive the circuit breaker handle to open/close through the second connecting rod; during manual operation, use the wrench tool Rotate the manual rotating shaft in the second direction opposite to the first direction, and the manual rotating shaft drives the driving flywheel to rotate through the first connecting rod (during this process, the slider rotates with the driving flywheel Sliding over the arc surface of the ratchet, so the transmission flywheel will not be hindered by the ratchet when it is manually operated), and at the same time, the handle of the circuit breaker is opened/closed by driving the second connecting rod.

Description of drawings

Fig. 1 is the structural representation of circuit breaker of the utility model;

Fig. 2 is a schematic structural diagram of the circuit breaker shown in Fig. 1 after removing some components;

3 is an assembly drawing of the upper cover and the control panel in the present invention;

Fig. 4 is in the utility model, the structural representation of described zero-sequence transformer;

Fig. 5 is a schematic structural diagram of the opening and closing operation device in the circuit breaker of the present invention;

Fig. 6 is a schematic structural view of the opening and closing operation device shown in Fig. 5 without some components.

The reference signs shown in the figure are: 1-drive motor; 2-transmission flywheel; 3-first connecting rod; 4-manual rotating shaft; 41-pushing part; 5-second connecting rod; Slider; 8-return spring; 9-center hole; 91-accommodating groove; 10-support; 11-breaker handle; 12-pin shaft; 13-cover plate; 14-middle cover; 15-top cover; 16 - base; 19 - power board; 18 - zero sequence transformer; 181 - perforation; 20 - main control board.

Detailed ways

The specific structure of the circuit breaker of the present utility model is described below in conjunction with the accompanying drawings of the description:

A circuit breaker, as shown in Figures 1 to 4, includes a housing formed by connecting a base 16, a middle cover 14, and an upper cover 15, and an opening and closing operation device and a main control board 20 installed in the housing. , a power board 17 and a zero-sequence transformer 18; the main control board 20 is fixed on the inner wall of the upper cover 15, and the middle cover 14 is provided with an accommodating cavity suitable for accommodating the power board 19, The power board 19 is arranged at the opening of the accommodating chamber, on which the transformer (not shown) is located in the accommodating chamber (blocked by the power board 19 in FIG. 2 ), and the zero sequence Transformer 18 is located in the base, and it includes a housing and four transformer coils arranged in the housing, and the positions corresponding to the holes of the transformer coils on the housing are provided with corresponding The through hole 181 through which the phase conducting plate passes. In this embodiment, by fixing the main control board 20 on the upper cover 15, fixing the power board 19 on the middle cover 14, and placing the transformer on the power board in the accommodation chamber of the middle cover 14, it is convenient for the main The wiring operation between the control board and the power board also prevents the related electronic components from being damaged by knocking, and makes the internal structure of the housing compact and reasonable, which is more conducive to the miniaturization design of the product. It has a very good use effect.

Further, as shown in Figure 5 and Figure 6, the opening and closing operation device in this embodiment includes a driving motor 1, a transmission flywheel 2, a first connecting rod 3, a manual rotating shaft 4, a second connecting rod 5 and a ratchet clutch Mechanism; the driving motor 1 is fixed in the fixing groove of the middle seat 14, the driving flywheel 2 is sleeved on the output shaft of the driving motor 1, and can rotate freely relative to the output shaft, and the ratchet clutch The mechanism includes a ratchet 6, a slider 7 and a return spring 8. The center of the drive flywheel 2 is provided with a central hole 9 suitable for setting the ratchet 6. The ratchet 6 is sleeved and fixed on the output shaft and is located at the center. In the hole 9, the side wall of the central hole 9 is provided with an accommodating groove 91 suitable for setting the slider 7 and the return spring 8, and the slider 7 resists under the action of the return spring 8. On the ratchet of the ratchet 6 (the shape of the ratchet is generally triangular, one side is an arc surface, and the other side is a blocking surface); One end of a connecting rod 3 and one end of the second connecting rod 5 are hinged, and the other end of the first connecting rod 3 is fixedly connected with the manual rotating shaft 4 that is rotatably arranged on the support 10, and the support 10 is fixed as n-shaped, its two ends are fixedly connected with the middle seat 14, the manual rotating shaft 4 is set coaxially with the output shaft, the other end of the second connecting rod 5 is connected with the breaker handle 11, the manual The rotating shaft 4 is provided with a pulling portion 41 which is beneficial for rotating it. In the circuit breaker opening and closing operation device of this embodiment, the manual operation part and the electric operation part are effectively combined, so that the structure of the operation device is more compact and reasonable, and the operation device occupies a small space, making the volume of the circuit breaker product more compact. It is miniaturized, and compared with the operating device in the background art, it also saves some parts, effectively reduces the production cost, and has a good use effect; when operated electrically, the drive motor 1 drives the ratchet 6 Rotate along the first direction, when the ratchet 6 is rotating, its upper blocking surface is against the slider 7 to drive the transmission flywheel 2 to rotate, and then drive the circuit breaker handle 11 to perform opening and closing actions through the second connecting rod 5; During operation, the manual shaft 4 is rotated in the second direction opposite to the first direction by a wrench tool, and the manual shaft 4 drives the transmission flywheel 2 to rotate through the first connecting rod 3 (during this process, the sliding The block 7 slides over the arc surface of the ratchet 6 during the rotation of the flywheel 2, so that the flywheel 2 will not be hindered by the ratchet 6 when it is rotated by manual operation), and at the same time by driving the first The two connecting rods 5 make the circuit breaker handle 11 open and close.

Further, the upper and lower sides of the transmission flywheel 2 are fixed with a cover plate 13 closely attached to it, and the cover plate 13 is set to limit the slider 7 and the return spring 8 in the accommodating groove 91, so that The slider 7 and the ratchet 6 are always kept on the same plane, thereby ensuring the reliability of cooperation.

The wrenching part 41 in this embodiment is an inner hexagonal structure, that is, the wrench tool used during manual operation is an outer hexagonal wrench. In practice, the wrenching part 41 can also be an outer hexagonal structure. The wrench tool used during operation is an Allen wrench.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or changes derived from the essential spirit of the present utility model still belong to the protection scope of the present utility model.

Claims (4)

1. A circuit breaker, comprising a housing formed by connecting a base (16), a middle cover (14) and an upper cover (15), and an opening and closing operation device and a main control board (20) installed in the housing , power supply board (17) and zero sequence transformer (18); It is characterized in that, described main control board (20) is fixed on the inner wall of described loam cake (15), and described middle cover (14) is provided with An accommodating chamber suitable for accommodating the power board (19), the power board (19) is arranged at the opening of the accommodating chamber, on which the transformer is located in the accommodating chamber, and the zero-sequence mutual inductance The device (18) is arranged in the base, and it includes a housing and four transformer coils arranged in the housing, and the positions corresponding to the holes of the transformer coils on the housing are provided with Corresponding to the perforation (181) through which the phase conducting plate passes. 2. The circuit breaker according to claim 1, characterized in that, the opening and closing operation device comprises a drive motor (1), a drive flywheel (2), a first connecting rod (3), a manual shaft (4), The second connecting rod (5) and the ratchet clutch mechanism; the driving motor (1) is fixed in the fixing groove of the middle seat (14), and the driving flywheel (2) is sleeved on the driving motor (1) On the output shaft of the output shaft, and can rotate freely relative to the output shaft, the ratchet clutch mechanism includes a ratchet (6), a slider (7) and a return spring (8), and the center of the drive flywheel (2) is provided with a suitable The central hole (9) of the ratchet (6) is provided, the ratchet (6) is sleeved and fixed on the output shaft and is located in the central hole (9), and the side wall of the central hole (9) is provided with There is an accommodating groove (91) suitable for setting the slider (7) and the return spring (8), and the slider (7) is pressed against the ratchet under the action of the return spring (8) (6) on the ratchet; the eccentric position of the transmission flywheel (2) is hinged with one end of the first connecting rod (3) and one end of the second connecting rod (5) through a pin shaft (12), The other end of the first connecting rod (3) is fixedly connected with the manual rotating shaft (4) which is rotatably arranged on the bracket (10). The seat (14) is fixedly connected, the manual rotating shaft (4) is set coaxially with the output shaft, the other end of the second connecting rod (5) is connected with the breaker handle (11), and the manual rotating shaft ( 4) There is a pulling part (41) that is beneficial to turning it. 3. The circuit breaker according to claim 2, characterized in that, the upper and lower sides of the transmission flywheel (2) are fixed with cover plates (13) closely fitted thereto. 4. The circuit breaker according to claim 2, characterized in that, the pulling part (41) is an inner hexagon or an outer hexagon structure.