Installation structure of mutual inductor and circuit breaker

Abstract

The installation structure of the mutual inductor comprises a mutual inductor body and further comprises a current-conducting plate and a line bank, the mutual inductor body is attached and fixed to the plate face of the current-conducting plate, the axis of a center hole of the mutual inductor body is perpendicular to the plate face of the current-conducting plate, and the line bank penetrates through the center hole of the mutual inductor body to be connected with the current-conducting plate; the circuit breaker comprises a shell, an operating mechanism and at least one circuit breaker pole are arranged in the shell, each circuit breaker pole comprises a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, each circuit breaker pole further comprises an installation structure of a mutual inductor, and a conductive plate is electrically connected with one wiring terminal. And the line bank is electrically connected with the contact mechanism. According to the utility model, the current-conducting plate does not penetrate through the central hole of the mutual inductor body, and the current-conducting plate and the mutual inductor body are arranged in parallel, so that compared with the mode that the current-conducting plate and the mutual inductor are arranged vertically, the current-conducting plate has the advantage of small occupied space, and the wiring operation is simplified by connecting the wiring bar with the contact mechanism.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a mounting structure of a mutual inductor and a circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy and protect power lines and motors. They can automatically cut off the circuit when they are seriously overloaded or have faults such as short circuits and undervoltage. In existing circuit breakers, fault detection such as overload, short circuit and undervoltage is closely related to the transformer inside. However, the transformer is usually arranged vertically with the conductive plate, and the conductive plate or the wire connected to the conductive plate passes through the center hole of the transformer, which is not convenient for wiring and occupies more internal space, which is not conducive to meeting the miniaturization design requirements of the circuit breaker. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a mounting structure of a mutual inductor and a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an installation structure of a transformer, comprising a transformer body, a conductive plate and a terminal block, wherein the transformer body is fitted and fixed to the plate surface of the conductive plate, and the axis of the central hole of the transformer body is perpendicular to the plate surface of the conductive plate, and the terminal block passes through the central hole of the transformer body and is connected to the conductive plate.

[0006] Furthermore, the terminal block includes a connector, which is arranged in the central hole of the transformer body, one end of the connector is connected to the plate surface of the conductive plate, and the other end of the connector is provided with a wiring pin.

[0007] Furthermore, the total length of the connection pin and the connector is greater than the thickness of the transformer body.

[0008] Furthermore, the outer diameter of the connector is equal to the diameter of the central hole of the transformer body, the end faces of the connector are respectively flush with the end faces of the transformer body, and the wiring pins protrude from the end face of the connector away from the conductive plate.

[0009] Furthermore, at least a part of the central hole of the transformer body is covered by the conductive plate.

[0010] Furthermore, the transformer body is provided with a wiring portion, and the wiring portion extends from the side of the conductive plate in a direction away from the transformer body.

[0011] Furthermore, the wiring portion extends along the end side of the conductive plate, and the end surface of the wiring portion protrudes from the conductive plate surface facing away from the transformer body.

[0012] The utility model also provides a circuit breaker, comprising a shell, in which an operating mechanism and at least one circuit breaker pole are arranged, the circuit breaker pole comprises a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, each circuit breaker pole also comprises the mounting structure of the mutual inductor as described above, the conductive plate is electrically connected to one of the wiring terminals, and the wiring row is electrically connected to the contact mechanism.

[0013] Preferably, the contact mechanism comprises a movable contact and a stationary contact which cooperate with each other, the movable contact is connected to the operating mechanism, and the terminal block is connected to the movable contact.

[0014] Preferably, the stationary contact comprises a stationary contact plate, a stationary contact point is provided on the side of the stationary contact plate facing the moving contact, the plate surfaces of the conductive plate and the stationary contact plate are parallel to each other, and the transformer body and the moving contact are located between the conductive plate and the stationary contact plate.

[0015] Preferably, an inner shell for accommodating a circuit breaker pole is provided in the outer shell, a wiring cavity is reserved between the inner wall of the outer shell and the outer wall of the inner shell, the conductive plate is arranged in the wiring cavity, and the transformer body is arranged inside the inner shell.

[0016] Preferably, the wiring terminal is arranged in the wiring cavity and corresponds to the wiring port opened on the side wall of the shell, and the conductive plate is connected to a wiring terminal in the same wiring cavity.

[0017] In the installation structure of the transformer and the circuit breaker of the utility model, the conductive plate does not pass through the central hole of the transformer body, and the conductive plate and the transformer body are arranged in parallel. Compared with the vertical arrangement of the conductive plate and the transformer, it has the advantage of occupying less space, and is connected with the contact mechanism through the terminal block, which simplifies the wiring operation.

[0018] In addition, the connector of the terminal block is arranged in the central hole of the transformer body, and the two ends of the connector are respectively flush with the two end faces of the transformer body, which reduces the space occupied by the terminal block and is conducive to further reducing the volume.

[0019] In addition, the connection part of the transformer body is arranged along the side of the conductive plate. In particular, the end face of the connection part protrudes from the conductive plate surface facing away from the transformer body, which facilitates the connection between the connection part and the control circuit board inside the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model mutual inductor;

[0021] Figure 2 It is an exploded diagram of the transformer of the utility model;

[0022] Reference numerals:

[0023] 1-transformer body, 11-wiring part, 2-conductive plate, 3-wiring bank, 31-connector, 32-wiring pin, 4-fastener. DETAILED DESCRIPTION

[0024] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the installation structure of the mutual inductor and the circuit breaker of the present utility model. The installation structure of the mutual inductor and the circuit breaker of the present utility model are not limited to the description of the following embodiments.

[0025] A circuit breaker comprises a shell, an operating mechanism and at least one circuit breaker pole are arranged in the shell, each circuit breaker pole comprises a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, the contact mechanism comprises a movable contact and a stationary contact that cooperate with each other, the movable contact is linked to the operating mechanism, the movable contact is driven by the operating mechanism to contact or separate with the stationary contact, thereby connecting or disconnecting the main line of each circuit breaker pole, each circuit breaker pole is also provided with a mutual inductor and a protection mechanism, the main line of the circuit breaker pole is connected to the mutual inductor, the mutual inductor feeds back a current signal to a control circuit board in the shell, the control circuit board can drive the protection mechanism according to the current signal, wherein the protection mechanism comprises a short-circuit protection mechanism and / or an overload protection mechanism, when a short-circuit fault occurs in the main line, the controller on the control circuit board drives the short-circuit protection mechanism to trigger the operating mechanism to trip, and when an overload fault occurs in the main line, the controller on the control circuit board drives the overload protection mechanism to trigger the operating mechanism to trip.

[0026] Specifically, the transformer is arranged between a terminal and a contact mechanism, and the transformer includes a transformer body 1. A conductive plate 2 is inserted into the center hole of the transformer body 1. At this time, the plane where the conductive plate 2 is located is perpendicular to the two end faces of the transformer body 1, that is, the conductive plate 2 and the transformer body 1 are arranged perpendicular to each other, one end of the conductive plate 2 is connected to the terminal, and the other end of the conductive plate 2 is connected to the moving contact or the static contact through a wire. The middle part of the conductive plate 2 can be bent once or more to adapt to the spatial position between the terminal and the contact mechanism. Of course, the other end of the conductive plate 2 can also be directly connected to the moving contact or the static contact.

[0027] The improvement of the present application lies in the installation structure of the transformer, which also includes a conductive plate 2 and a terminal block 3. The transformer body 1 is fixed to the surface of the conductive plate 2, and the axis of the center hole of the transformer body 1 is perpendicular to the surface of the conductive plate 2. The terminal block 3 passes through the center hole of the transformer body 1 and is connected to the conductive plate 2.

[0028] In this way, the conductive plate 2 does not pass through the central hole of the transformer body 1, and the conductive plate 2 and the transformer body 1 are arranged in parallel. Compared with the vertical arrangement of the conductive plate 2 and the transformer 1, it has the advantage of occupying less space and is connected to the contact mechanism through the terminal block 3, which simplifies the wiring operation.

[0029] Furthermore, the terminal block 3 includes a connector 31, the outer diameter of the connector 31 is less than or equal to the diameter of the center hole of the transformer body 1, so that the connector 31 can be set in the center hole of the transformer body 1, one end of the connector 31 is connected to the plate body of the conductive plate 2, and the other end of the connector 31 is provided with a wiring pin 32, the total length of the wiring pin 32 and the connector 31 is greater than the thickness of the transformer body 1, at least so that the wiring pin 32 is located outside the center hole of the transformer body 1, which is convenient for the wiring pin 32 to be plugged into the contact mechanism, that is, through the wiring pin 32, it is connected to the moving contact or the static contact, so that the transformer is connected to the main line of each circuit breaker pole, simplifying the wiring process.

[0030] Preferably, the outer diameter of the connector 31 is equal to the diameter of the center hole of the transformer body 1, and the length of the connector 31 is equal to the length of the center hole of the transformer body 1. At this time, the connector 31 is filled in the center hole of the transformer body 1, and the end faces of the connector 31 are respectively flush with the end faces of the transformer body 1, and the wiring pins 32 protrude from the end face of the connector 31 away from the conductive plate 2. In addition, at least a part of the center hole of the transformer body 1 is covered by the conductive plate 2, so as to facilitate the fitting connection between the connector 31 and the conductive plate 2.

[0031] Furthermore, the transformer body 1 is provided with a wiring portion 11, and the wiring portion 11 extends from the side of the conductive plate 2 in a direction away from the transformer body 1, so as to facilitate the connection of the wiring portion 11 with the control circuit board inside the circuit breaker.

[0032] Combination Figure 1-2 A specific embodiment of a mounting structure of a mutual inductor is provided.

[0033] like Figure 1 , 2 As shown, the installation structure of the transformer includes a transformer body 1, a conductive plate 2 and a terminal block 3. The transformer body 1 is fitted and fixed to the surface of the conductive plate 2, and the surface of the conductive plate 2 covers the center hole of the transformer body 1. The axis of the center hole of the transformer body 1 is perpendicular to the surface of the conductive plate 2. The terminal block 3 passes through the center hole of the transformer body 1. One end of the terminal block 3 is fitted with the conductive plate 2, and the other end of the terminal block 3 is provided with a terminal pin 32.

[0034] Specifically, the terminal block 3 includes a circular shaft-shaped connector 31, the outer diameter of the connector 31 is equal to the diameter of the center hole of the transformer body 1, and the length of the connector 31 is equal to the axial length of the center hole of the transformer body 1. When the connector 31 is set in the center hole of the transformer body 1, the connector 31 can be filled therein so that the end faces of the connector 31 are respectively flush with the end faces of the transformer body 1, and one end of the connector 31 is in contact with the plate surface of the conductive plate 2. The connector 31 is fixedly connected to the conductive plate 2 by at least one fastener 4. The other end of the connector 31 is provided with a wiring pin 32, and the wiring pin 32 is located outside the center hole of the transformer body 1. The wiring pin 32 is used to connect to the contact mechanism.

[0035] A wiring portion 11 is provided on one side of the transformer body 1. The wiring portion 11 extends from the end side of the conductive plate 2 in a direction away from the transformer body 1. That is, the wiring portion 11 and the wiring pins 32 extend in two opposite directions of the transformer body 1. The wiring portion 11 is used to connect to the control circuit board inside the circuit breaker. Figure 1 In the embodiment, the end face of the wiring portion 11 is parallel to the surface of the conductive plate 2 facing away from the transformer body 1. Preferably, the end face of the wiring portion 11 slightly protrudes from the surface of the conductive plate 2 facing away from the transformer body 1 to facilitate the connection between the wiring portion 11 and the control circuit board.

[0036] A circuit breaker comprises a shell, in which an operating mechanism and at least one circuit breaker pole are arranged, wherein the operating mechanism adopts the existing technology, and comprises a pair of brackets arranged in the shell, and a trip button, a lock button, a re-click, a connecting rod assembly and a linkage member are assembled between the pair of brackets, wherein the trip button is engaged with the lock button, the lock button is engaged with the re-click in a limited position, the linkage member is linked to the trip button through the connecting rod assembly, and the linkage member drives the moving contact of the contact mechanism to rotate for opening and closing, and a traction rod is arranged on one side of the operating mechanism, and the traction rod is used to drive the re-click to release the limited position engagement with the lock button, so that the lock button and the trip button are released from the clasp engagement, and the operating mechanism is tripped.

[0037] Each circuit breaker pole includes a pair of terminals, which are arranged along opposite sides of the circuit breaker pole respectively. A contact mechanism is connected between the pair of terminals. The contact mechanism includes a moving contact and a stationary contact that cooperate with each other, wherein the moving contact is connected to the operating mechanism. In this embodiment, a transformer assembled in the manner described in the above embodiment is arranged between the moving contact and one of the terminals. The conductive plate 2 is connected to the adjacent terminal, the terminal block 3 is connected to the moving contact, the wiring portion 11 of the transformer is connected to the control circuit board inside the housing, the stationary contact includes a stationary contact plate, the plate surfaces of the stationary contact plate and the conductive plate 2 are parallel to each other, and the moving contact and the transformer body 1 are located between the stationary contact plate and the conductive plate 2.

[0038] Preferably, an inner shell for accommodating the circuit breaker pole is provided inside the outer shell, and a gap as a wiring cavity is left between the outer wall of the inner shell and the inner wall of the outer shell. The wiring cavities are preferably distributed on opposite sides outside the inner shell, and a pair of wiring terminals are respectively provided in a wiring cavity, and each wiring terminal corresponds to a wiring port provided on the outer shell, so as to facilitate wiring. The conductive plate 2 is provided in a wiring cavity and electrically connected to the wiring terminal in the same wiring cavity, and the transformer body 1 is provided inside the inner shell, and the fastener 4 passes through the side wall of the inner shell to connect the conductive plate 2 and the wiring row 3 together. Of course, the wiring cavity can also be located on the same side outside the inner shell, in which case a pair of wiring terminals are provided together in the same wiring cavity or respectively provided in two wiring cavities, and the conductive plate 2 is electrically connected to the same wiring terminal in the same wiring cavity.

[0039] In addition, a short-circuit protection mechanism and an overload protection mechanism are also provided in each circuit breaker pole. The short-circuit protection mechanism and the overload protection mechanism are respectively connected to the main line of the circuit breaker pole. The short-circuit protection mechanism and the overload protection mechanism can adopt existing technologies. For example, the short-circuit protection mechanism adopts a snap-on electromagnetic release or a screw-type electromagnetic release, and the overload protection mechanism can adopt a bimetallic strip. The short-circuit protection mechanism and the static contact are located on the same side of the circuit breaker pole, and the overload protection mechanism and the mutual inductor are located on the other side of the circuit breaker pole, and the short-circuit protection mechanism and the overload protection mechanism cooperate with the operating mechanism respectively.

[0040] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0041] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A transformer installation structure, comprising a transformer body (1), characterized in that: It also comprises a conductive plate (2) and a terminal block (3), wherein the transformer body (1) is fitted and fixed to the surface of the conductive plate (2), and the axis of the central hole of the transformer body (1) is perpendicular to the surface of the conductive plate (2), and the terminal block (3) passes through the central hole of the transformer body (1) and is connected to the conductive plate (2).

2. The installation structure of the mutual inductor according to claim 1, characterized in that: The terminal block (3) comprises a connector (31), wherein the connector (31) is arranged in the central hole of the transformer body (1), one end of the connector (31) is connected to the plate surface of the conductive plate (2), and the other end of the connector (31) is provided with a connector pin (32).

3. The installation structure of the mutual inductor according to claim 2, characterized in that: The total length of the connection pin (32) and the connecting body (31) is greater than the thickness of the transformer body (1).

4. The installation structure of the mutual inductor according to claim 3, characterized in that: The outer diameter of the connector (31) is equal to the diameter of the central hole of the transformer body (1), the end faces of the connector (31) are respectively kept flush with the end faces of the transformer body (1), and the wiring pin (32) protrudes from the end face of the connector (31) at one end away from the conductive plate (2).

5. The installation structure of the mutual inductor according to claim 1, characterized in that: At least a part of the central hole of the mutual inductor body (1) is covered by the conductive plate (2).

6. The installation structure of the mutual inductor according to claim 1, characterized in that: The transformer body (1) is provided with a wiring portion (11), and the wiring portion (11) extends from the side of the conductive plate (2) in a direction away from the transformer body (1).

7. The installation structure of the mutual inductor according to claim 6, characterized in that: The wiring portion (11) extends along the end side of the conductive plate (2), and the end face of the wiring portion (11) protrudes from the plate surface of the conductive plate (2) facing away from the transformer body (1).

8. A circuit breaker, comprising a housing, wherein an operating mechanism and at least one circuit breaker pole are arranged in the housing, wherein the circuit breaker pole comprises a pair of terminals and a contact mechanism connected between the pair of terminals, characterized in that: Each circuit breaker pole further comprises a mounting structure for a transformer as claimed in any one of claims 1 to 7, the conductive plate (2) is electrically connected to one of the wiring terminals, and the wiring row (3) is electrically connected to a contact mechanism.

9. The circuit breaker according to claim 8, characterized in that: The contact mechanism comprises a movable contact and a stationary contact which cooperate with each other, the movable contact is connected to the operating mechanism, and the terminal block (3) is connected to the movable contact.

10. The circuit breaker according to claim 9, characterized in that: The stationary contact comprises a stationary contact plate, a stationary contact point is provided on the side of the stationary contact plate facing the moving contact, the plate surfaces of the conductive plate (2) and the stationary contact plate are parallel to each other, and the mutual inductor body (1) and the moving contact are located between the conductive plate (2) and the stationary contact plate.

11. The circuit breaker according to claim 8, characterized in that: An inner shell for accommodating a circuit breaker pole is arranged inside the outer shell, a wiring cavity is left between the inner wall of the outer shell and the outer wall of the inner shell, the conductive plate (2) is arranged in the wiring cavity, and the mutual inductor body (1) is arranged inside the inner shell.

12. The circuit breaker according to claim 8, characterized in that: The connection terminal is arranged in the wiring cavity and corresponds to the connection port opened on the side wall of the shell, and the conductive plate (2) is connected to a connection terminal in the same wiring cavity.

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