A compact circuit breaker

Abstract

The present application relates to a compact circuit breaker, which includes a housing, a moving contact operating mechanism, an electric operating mechanism, a handle, a first connecting rod, a second connecting rod, a moving contact and a static contact; the other end of the first connecting rod is connected to the moving contact operating mechanism, and the other end of the second connecting rod is connected to the electric operating mechanism, and the handle rotates and drives the moving contact operating mechanism to operate to achieve the connection or disconnection of the moving contact and the static contact; the electric operating mechanism includes a motor, a screw, a nut slider, a current release set, a planetary gear set and a bevel gear set, the axis direction of the output shaft of the motor is arranged perpendicular to the axis direction of the screw, one end of the second connecting rod is movably connected to the nut slider, the static contact is installed on the current release set, and the nut slider links the current release set to operate to achieve the connection or disconnection of the moving contact and the static contact. The present application has the effect of reasonably utilizing the internal space of the circuit breaker, and is suitable for installation and use in a narrow space, thereby reducing the cost of the product.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a compact circuit breaker. Background Art

[0002] A circuit breaker is a mechanical switch that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain time and disconnect current under specified abnormal circuit conditions. It is suitable for overload and short-circuit protection of lines, and can also be used for infrequent operation conversion of lines under normal circumstances. It is mainly used in various places such as industry, commerce, high-rise buildings and residential buildings.

[0003] In the prior art, the intelligent miniature circuit breaker is equipped with an opening and closing electric operating mechanism on the left or right side of the ordinary circuit breaker to realize remote control. At the same time, a housing cavity for placing a zero-sequence transformer is provided in the shell. The zero-sequence transformer is located in the zero-sequence transformer placement cavity. However, placing the transformer requires expanding the internal space of the circuit breaker, generally by lengthening the length of the circuit breaker. This will cause the installation width of the circuit breaker to be greater than that of an ordinary circuit breaker, thereby increasing the overall occupied space, increasing the construction cost, and is not suitable for installation and use in a narrow space. Utility Model Content

[0004] The present application provides a compact circuit breaker, which has the effect of reasonably utilizing the internal space of the circuit breaker, being suitable for installation and use in a narrow space, and reducing the product cost.

[0005] A compact circuit breaker provided in this application adopts the following technical solution:

[0006] A compact circuit breaker comprises a housing and a moving contact operating mechanism and an electric operating mechanism installed in the housing. A handle is arranged on the housing, and the handle is movably connected to a first connecting rod and a second connecting rod respectively; the other end of the first connecting rod is connected to the moving contact operating mechanism, and the other end of the second connecting rod is connected to the electric operating mechanism. The moving contact operating mechanism is connected to a moving contact, and the electric operating mechanism is connected to a stationary contact. The handle rotates and drives the moving contact operating mechanism to operate so as to realize the connection or disconnection of the moving contact and the stationary contact; the electric operating mechanism comprises a motor, A screw is rotatably installed in the shell, a nut slider is directionally slidably installed in the shell and threadedly connected to the screw, a current release group movably connected to the nut slider, a planetary gear group connected to the motor output shaft, and a bevel gear group installed between one end of the screw and the planetary gear group, the axis direction of the output shaft of the motor is arranged perpendicular to the axis direction of the screw, one end of the second connecting rod is movably connected to the nut slider, the static contact is installed on the current release group, and the nut slider links the current release group to achieve connection or disconnection of the moving contact and the static contact.

[0007] Preferably, the bevel gear set includes a bevel gear 1 connected to the planetary gear set and a bevel gear 2 fixedly mounted on the screw, and the bevel gear 1 is meshingly and transmission-connected with the bevel gear 2.

[0008] Preferably, the current release group includes a current release body, a rotating gear rotatably connected to the shell, an upper rack installed on the nut slider, and a lower rack connected to the current release body, the upper rack and the lower rack are arranged up and down and are respectively meshed and transmission connected with the rotating gear, and one end of the coil of the current release body is electrically connected to the static contact.

[0009] Preferably, a accommodating cavity is provided in the shell, and the accommodating cavity is located below the motor. A remote control communication module for controlling the operation of the electric operating mechanism is installed in the accommodating cavity, and the remote control communication module includes a communication interface arranged in the accommodating cavity, a control circuit board and a current transformer.

[0010] Preferably, a mode selection switch is provided on the housing, and the mode selection switch can select a local mode or a remote mode; when the local mode is selected, the electric operating mechanism function is in an off state, and the circuit breaker cannot be closed or opened remotely; when the remote mode is selected, the electric operating mechanism function is in an on state, and the circuit breaker can be closed or opened by remotely controlling the remote control communication module.

[0011] Preferably, the housing is provided with an inlet terminal and an outlet terminal for connecting a wire, the stationary contact is electrically connected to the inlet terminal, and the moving contact is electrically connected to the outlet terminal.

[0012] In summary, the present application includes at least one of the following beneficial technical effects:

[0013] The handle is rotated to drive the moving contact operating mechanism to move, so as to achieve contact or separation between the moving contact and the static contact, thereby achieving connection or disconnection between the incoming and outgoing terminals, that is, achieving closing or opening of the circuit breaker; the screw and nut slider in the electric operating mechanism are operated to make the current release group drive the rotation of the moving contact operating mechanism to achieve contact or separation between the moving contact and the static contact, thereby achieving connection or disconnection between the incoming and outgoing terminals, and finally achieving closing or opening of the circuit breaker; the planetary gear set and the bevel gear set cooperate with each other, so that the axial direction of the output shaft of the motor is arranged perpendicular to the axial direction of the screw, thereby reducing the overall width of the circuit breaker, rationally utilizing the internal space of the circuit breaker, and being suitable for installation and use in narrow spaces, thereby reducing the cost of the product.

[0014] When the circuit breaker is in the closed state, the motor can drive the nut slider to move away from the handle, and the nut slider causes the current release group to trigger the moving contact operating mechanism to operate, thereby realizing the circuit breaker opening; if the circuit breaker is in the open state, the motor in the electric operating mechanism can work and drive the nut slider to move toward the handle, and the nut slider drives the moving contact operating mechanism to reset, and at the same time, the nut slider drives the second connecting rod to push the handle to rotate, thereby realizing the circuit breaker closing...;

[0015] When the mode selection switch on the circuit breaker is set to local mode, the circuit breaker can be closed and opened manually by turning the handle. At this time, the circuit breaker cannot be remotely closed or opened. When the mode selection switch on the circuit breaker is set to remote mode, the electric operating mechanism can control the remote closing or opening of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structural diagram of the compact circuit breaker;

[0017] Figure 2 This is a front view of the compact circuit breaker with one side of the housing removed;

[0018] Figure 3 It is a structural diagram of the handle, the moving contact operating mechanism, and the electric operating mechanism;

[0019] Figure 4 It is a schematic diagram of the layout structure of the electric operating mechanism;

[0020] Figure 5 It is a schematic diagram of the connection structure of the planetary gear set and the bevel gear set in the electric operating mechanism.

[0021] Explanation of the accompanying drawings: 1. Shell; 11. Inlet terminal; 12. Outlet terminal; 13. Accommodating chamber; 14. Mode selection switch; 2. Handle; 21. First connecting rod; 22. Second connecting rod; 3. Moving contact operating mechanism; 31. Moving contact; 4. Electric operating mechanism; 41. Static contact; 42. Motor; 43. Screw; 44. Nut slider; 45. Current release group; 451. Current release body; 452. Rotating gear; 453. Upper rack; 454. Lower rack; 46. Planetary gear set; 47. Bevel gear set; 471. Bevel gear one; 472. Bevel gear two; 5. Remote control communication module. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings.

[0023] An embodiment of the present application discloses a compact circuit breaker.

[0024] Reference Figure 1 , Figure 2The compact circuit breaker includes a housing 1, a handle 2 rotatably mounted on the housing 1, and a moving contact operating mechanism 3 and an electric operating mechanism 4 installed in the housing 1. An inlet terminal 11 and an outlet terminal 12 for connecting lines are arranged on both sides of the housing 1.

[0025] Reference Figure 2 , Figure 3 , wherein the handle 2 is movably connected with a first connecting rod 21 and a second connecting rod 22 respectively, the other end of the first connecting rod 21 is connected to a moving contact operating mechanism 3, and the other end of the second connecting rod 22 is connected to an electric operating mechanism 4; the moving contact operating mechanism 3 is connected to a moving contact 31, and the moving contact 31 is electrically connected to the outlet terminal 12; the electric operating mechanism 4 is connected to a static contact 41, and the static contact 41 is electrically connected to the incoming terminal 11; the handle 2 is rotated and the moving contact operating mechanism 3 is driven to operate, so as to realize the contact or separation between the moving contact 31 and the static contact 41, thereby realizing the connection or disconnection between the incoming terminal 11 and the outgoing terminal 12, that is, realizing the closing or opening of the circuit breaker.

[0026] Reference Figures 2 to 5 The electric operating mechanism 4 includes a motor 42, a screw 43 rotatably installed in the housing 1, a nut slider 44 directional slidingly installed in the housing 1 and threadedly connected to the screw 43, a current release group 45 movably connected to the nut slider 44, a planetary gear group 46 connected to the output shaft of the motor 42, and a bevel gear group 47 installed between one end of the screw 43 and the planetary gear group 46; the axis direction of the output shaft of the motor 42 is arranged perpendicular to the axis direction of the screw 43, one end of the second connecting rod 22 is movably connected to the nut slider 44, the static contact 41 is installed on the current release group 45, and the nut slider 44 links the current release group 45 to achieve the connection or disconnection of the moving contact 31 and the static contact 41.

[0027] The bevel gear set 47 includes a bevel gear 1 471 connected to the planetary gear set 46 and a bevel gear 2 472 fixedly mounted on the screw 43, and the bevel gear 1 471 is meshed and transmission-connected with the bevel gear 2 472; the current release set 45 includes a current release body 451, a rotating gear 452 rotatably connected to the housing 1, an upper rack 453 mounted on the nut slider 44, and a lower rack 454 connected to the current release body 451, the upper rack 453 and the lower rack 454 are arranged up and down and are respectively meshed and transmission-connected with the rotating gear 452, one end of the coil of the current release body 451 is electrically connected to the incoming line terminal 11, and the other end is electrically connected to the static contact 41.

[0028] The moving screw 43 and the nut slider 44 of the electric operating mechanism 4 operate, thereby driving the rotating gear and the upper rack 453 and the lower rack 454 to operate mutually, so that the current release body 451 drives the rotation of the moving contact operating mechanism 3 to achieve the contact or separation of the moving contact 31 and the static contact 41, thereby achieving the connection or disconnection of the incoming terminal 11 and the outgoing terminal 12, and finally achieving the closing or opening of the circuit breaker.

[0029] The specific structure and principle of the moving contact operating mechanism 3 and the current release body 451 are consistent with those in the patent application document with Chinese patent application number 202021663014.9 and announcement date January 15, 2021, and they are all owned by the same patent owner, so they will not be repeated here.

[0030] A accommodating chamber 13 is provided in the shell 1, and the accommodating chamber 13 is located below the motor 42. A remote control communication module 5 for controlling the operation of the motor 42 in the electric operating mechanism 4 is installed in the accommodating chamber 13; the remote control communication module 5 includes a communication interface, a control circuit board and a current transformer arranged in the accommodating chamber 13.

[0031] A mode selection switch 14 is provided on the housing 1, and a local mode or a remote mode can be selected through the mode selection switch 14, which can simultaneously satisfy the control of the handle 2 by the electric operating mechanism 4 and manual drive; when the local mode is selected, the function of the electric operating mechanism 4 is in an off state, and the circuit breaker cannot be closed or opened remotely at this time; when the remote mode is selected, the function of the electric operating mechanism 4 is in an on state, and the circuit breaker can be closed or opened by remotely controlling the remote control communication module 5.

[0032] The remote control communication module 5 is used to receive external signals, and then the electric operating mechanism 4 is driven according to the external signals to realize the rotation of the moving contact operating mechanism 3, thereby realizing the connection or disconnection of the incoming terminal 11 and the outgoing terminal 12, so as to select whether to have the remote control function according to the actual situation, and there is no need to rely on the external opening and closing electric operating mechanism. The overall space occupied is small, and more quantities can be installed in the same distribution box space, thereby improving the practicality of the product.

[0033] The implementation principle is: when the circuit breaker is in the closed state, the motor 42 can drive the nut slider 44 to move in the direction away from the handle 2. After the nut slider 44 moves a certain distance, the upper rack 453 first meshes with the rotating gear 452 and drives the rotating gear 452 to rotate counterclockwise, so that the lower rack 454 moves to the right and the current release body 451 triggers the moving contact operating mechanism 3 to operate, thereby realizing the circuit breaker opening; in this state, if the user commands the circuit breaker to be locked (that is, the nut slider 44 is located at the position farthest from the handle 2), the circuit breaker can no longer be manually closed. When the circuit breaker is opened due to an overcurrent fault in the line, the user cannot manually close the circuit breaker, thereby improving safety and avoiding safety hazards. If the circuit breaker is in the open state, the motor 42 in the electric operating mechanism 4 can work and drive the nut slider 44 to move in the direction close to the handle 2, and the nut slider 44 drives the rotating gear 452 to rotate clockwise until the upper rack 453 on the nut slider 44 is no longer engaged with the rotating gear 452. In this process, the lower rack 454 moves the current release body 451 in the direction away from the moving contact operating mechanism 3 to reset, and at the same time, the nut slider 44 drives the second connecting rod 22 to push the handle 2 to rotate, so as to achieve the closing of the circuit breaker. If the user commands the circuit breaker to be locked (that is, the nut slider 44 is located at the position closest to the handle 2), the closing lock is achieved. In this state, the circuit breaker can no longer be manually opened manually, which can prevent some people from opening the circuit breaker due to misoperation; if the user does not command the motor 42 assembly to be locked, the normal working state is closed by the second connecting rod 22, the motor 42 reverses, and the nut slider 44 moves to the free position. At this time, the handle 2 can be manually opened or closed.

[0034] When the mode selection switch 14 on the circuit breaker is selected as the local mode, the closing and opening of the circuit breaker can be manually realized by turning the handle 2. At this time, the circuit breaker cannot be remotely controlled to close or open remotely. When the mode selection switch 14 on the circuit breaker is selected as the remote mode, the electric operating mechanism 4 can control the remote closing or opening of the circuit breaker. If the motor 42 is not working, the circuit breaker still supports manual turning of the handle 2 to close or open the circuit breaker. If the motor 42 is working and the nut slider 44 moves to the end close to the handle 2, the circuit breaker is remotely controlled to close and the closing is locked, and it is impossible to manually open the circuit breaker by turning the handle 2; if the motor 42 is working and the nut slider 44 moves to the end away from the handle 2, the circuit breaker is remotely opened and the opening is locked, and it is impossible to manually close the circuit breaker by turning the handle 2.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A compact circuit breaker, comprising a housing (1) and a movable contact operating mechanism (3) and an electric operating mechanism (4) installed in the housing (1); a handle (2) is arranged on the housing (1), and the handle (2) is movably connected to a first connecting rod (21) and a second connecting rod (22); the other end of the first connecting rod (21) is connected to the movable contact operating mechanism (3), and the other end of the second connecting rod (22) is connected to the electric operating mechanism (4); the movable contact operating mechanism (3) is connected to a movable contact (31), and the electric operating mechanism (4) is connected to a stationary contact (41); the handle (2) rotates and drives the movable contact operating mechanism (3) to operate so as to realize the connection or disconnection of the movable contact (31) and the stationary contact (41); and the characteristics are as follows: The electric operating mechanism (4) comprises a motor (42), a screw (43) rotatably mounted in a housing (1), a nut slider (44) directional-slidably mounted in the housing (1) and threadedly connected to the screw (43), a current release assembly (45) movably connected to the nut slider (44), a planetary gear assembly (46) connected to an output shaft of the motor (42), and a bevel gear assembly (47) mounted between one end of the screw (43) and the planetary gear assembly (46), wherein the axis direction of the output shaft of the motor (42) is arranged perpendicular to the axis direction of the screw (43), one end of the second connecting rod (22) is movably connected to the nut slider (44), the static contact (41) is mounted on the current release assembly (45), and the nut slider (44) links the current release assembly (45) to move so as to achieve connection or disconnection of the moving contact (31) and the static contact (41).

2. The compact circuit breaker according to claim 1, characterized in that: The bevel gear set (47) comprises a bevel gear 1 (471) connected to the planetary gear set (46) and a bevel gear 2 (472) fixedly mounted on the screw rod (43), wherein the bevel gear 1 (471) is meshingly connected to the bevel gear 2 (472).

3. The compact circuit breaker according to claim 1, characterized in that: The current release assembly (45) comprises a current release body (451), a rotating gear (452) rotatably connected to the housing (1), an upper rack (453) mounted on a nut slider (44), and a lower rack (454) connected to the current release body (451); the upper rack (453) and the lower rack (454) are arranged up and down and are respectively meshed and transmission-connected with the rotating gear (452); one end of the coil of the current release body (451) is electrically connected to the static contact (41).

4. The compact circuit breaker according to claim 1, characterized in that: A housing chamber (13) is provided in the housing (1), the housing chamber (13) being located below the motor (42), a remote control communication module (5) for controlling the operation of the electric operating mechanism (4) being installed in the housing chamber (13), the remote control communication module (5) comprising a communication interface provided in the housing chamber (13), a control circuit board and a current transformer.

5. The compact circuit breaker according to claim 4, characterized in that: A mode selection switch (14) is provided on the housing (1), and the mode selection switch (14) can select a local mode or a remote mode; when the local mode is selected, the function of the electric operating mechanism (4) is in an off state, and the circuit breaker cannot be closed or opened remotely; when the remote mode is selected, the function of the electric operating mechanism (4) is in an on state, and the circuit breaker can be closed or opened by remotely controlling the remote control communication module (5).

6. The compact circuit breaker according to claim 1, characterized in that: The housing (1) is provided with an inlet terminal (11) and an outlet terminal (12) for connecting a wire, the stationary contact (41) is electrically connected to the inlet terminal (11), and the moving contact (31) is electrically connected to the outlet terminal (12).

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