CN210897155U - Circuit breaker with overload tripping detection function - Google Patents

Abstract

The utility model provides a circuit breaker with overload dropout detects function, its includes the casing and sets up operating device, overload protection mechanism and the indicating mechanism in the casing, overload protection mechanism includes the bimetallic strip, indicating mechanism includes connecting piece and metal probe, connecting piece and metal probe are connected with the circuit board electricity respectively, when the circuit transships, the bimetallic strip is crooked and the contact of connecting piece and/or metal probe or is separated, the bimetallic strip switches on or breaks off the connecting piece and produces the detection signal with the return circuit that metal probe is located.

Description

Circuit breaker with overload tripping detection function

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a circuit breaker with overload dropout detects function.

Background

The circuit breaker is an important component of the electrical appliance industry, and can close (switch on) and open (switch off) the circuit when an electrical circuit works normally; when the electric circuit breaks down, the circuit breaker can automatically cut off (trip) the circuit, so that the safety of workers and the normal operation of equipment are prevented from being endangered due to the circuit failure.

It is generally possible to identify whether a circuit breaker is closed or opened according to the position of a handle of the circuit breaker, but when a circuit is tripped, it is impossible to judge whether the circuit is tripped due to overload or short circuit.

However, it is very meaningful for users to clearly know whether a short circuit or overload occurs, and if the overload occurs, part of the electric equipment on the circuit can be cut off, and the circuit breaker can be normally used after being closed; but if the short circuit is failed, a short circuit point must be found, and the breaker is closed after the short circuit point is eliminated, or the breaker is immediately replaced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker with overload dropout detects function.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a circuit breaker with overload dropout detects function, its includes the casing and sets up operating device, overload protection mechanism and the indicating mechanism in the casing, overload protection mechanism includes the bimetallic strip, indicating mechanism includes connecting piece and metal probe, connecting piece and metal probe are connected with the circuit board electricity respectively, when the circuit transships, the bimetallic strip is crooked and the contact of connecting piece and/or metal probe or is separated, the bimetallic strip switches on or breaks off the connecting piece and produces the detection signal with the return circuit that metal probe is located.

Preferably, the connecting piece is fixedly connected with one end of the bimetallic strip, the metal probe is arranged on one side of the other end of the bimetallic strip, and the bimetallic strip enables the circuit breaker to trip when a line is overloaded and contacts with the metal probe to conduct the metal probe and the connecting piece to generate a detection signal.

Preferably, the circuit breaker includes two at least casings that set up side by side, circuit board and overload protection mechanism install respectively in two adjacent casings, and be equipped with on the curb plate between two adjacent casings a plurality of respectively with metal probe complex mounting hole, metal probe's one end and circuit board are connected, and metal probe's the other end passes the curb plate and stretches to one side of bimetallic strip.

Preferably, the circuit board comprises a telecommunications module and/or an indicator circuit.

Preferably, the bimetallic strip includes the fixed part that sets up in one end to and set up at the other end and operating device complex flexion, and indicating mechanism includes the connecting piece of being connected with the fixed part, and the interval sets up the metal probe in bimetallic strip crooked direction one side, and connecting piece and metal probe are connected with the circuit board respectively, and the bimetallic strip is crooked when transshipping and metal probe contact.

Preferably, an adjusting screw matched with the fixing part is arranged in the shell, and the adjusting screw can push the fixing part to enable the bimetallic strip to swing.

Preferably, the side plate is provided with a first through hole matched with the metal probe and a second through hole matched with the connecting piece, the connecting piece penetrates through the second through hole to be connected with one end of the bimetallic strip, and the metal probe penetrates through the second through hole to extend to one side of the other end of the bimetallic strip to be matched; the side plate is provided with a limiting boss at one side of the first through hole, away from the bimetallic strip, the side face of the limiting boss is provided with a limiting groove, and the limiting groove is matched with the side face of the metal probe, away from the bimetallic strip.

Preferably, the connecting member is fixedly connected to one end of the bimetal, the metal probe is disposed at a back side of the bimetal in a bending direction, and the bimetal is separated from the metal probe when being overloaded to generate a detection signal.

Preferably, the device also comprises a short-circuit protection mechanism, and the bimetallic strip unlocks the operating mechanism when the short-circuit protection mechanism is overloaded; the operating mechanism comprises a rocker arm which is pivotally arranged in the shell, a spring connected with the rocker arm, a jump buckle and a lock catch which are respectively pivotally arranged on the rocker arm, the jump buckle and the lock catch are mutually in hasp fit, the lock catch is connected with the handle through a connecting rod, the moving contact is connected with the rocker arm, the overload protection mechanism is arranged on one side of the jump buckle, a pull rod matched with the overload protection mechanism is arranged on the jump buckle, when the jump buckle is matched with the lock catch, the handle can drive the rocker arm to drive the moving contact to be contacted with the fixed contact, the rocker arm compression spring is in balance, the short-circuit protection mechanism and the overload protection mechanism can respectively drive the jump buckle to be unlocked from the lock catch, the rocker arm loses balance, and the moving.

Preferably, be equipped with the spacing arm of combined floodgate in the handle, the spacing arm one end of combined floodgate is rotated and is installed in the pivot of handle, the other end be equipped with rocking arm complex arcwall face, one side of arcwall face is equipped with bent type elastic arm, during the combined floodgate, the spacing arm of combined floodgate rotates along with the handle, its arcwall face and rocking arm contact sliding fit, make the spring energy storage on the rocking arm simultaneously to the rocking arm spacing earlier, slide at the arcwall face of the spacing arm of combined floodgate and rocking arm after crossing a utmost point position, the restriction to the rocking arm is relieved to the arcwall face, the rocking arm closes floodgate under the.

The utility model discloses an overload dropout detects function circuit breaker with overload dropout detects function, connecting piece and metal probe are connected with the bimetallic strip respectively, and the bimetallic strip triggers circuit breaker tripping operation and bimetallic strip and metal probe contact or separation during overload, and the return circuit that switches on or breaks off metal probe and connecting piece place by the bimetallic strip produces the detected signal, plays overload protection and instructs the effect of trouble simultaneously, has the characteristics of the reliability height and simple structure.

In addition, through installing circuit board and overload protection mechanism in two different casings respectively, have simple to operate's characteristics, the mounting hole on the curb plate can also play the spacing effect to the metal probe between two casings moreover, effectively utilizes limited space in the circuit breaker casing, can compact circuit breaker's structure and reduce the volume of circuit breaker.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic view of the bimetallic strip and the metal probe in the case of separation according to the embodiment of the present invention;

fig. 3 is a schematic view illustrating the fitting of the bimetal strip in contact with the metal probe according to the embodiment of the present invention.

Detailed Description

The following describes the specific implementation of the circuit breaker with overload trip detection function according to the present invention with reference to the embodiments shown in fig. 1 to 3. The circuit breaker with overload trip detection function of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the circuit breaker with overload trip detection function of the present invention includes a housing, and an operating mechanism 11, an overload protection mechanism and an indication mechanism disposed in the housing, wherein the operating mechanism 11 is connected with a handle 12 and a moving contact 13, the handle 12 can drive the operating mechanism 11 to drive the moving contact 13 to contact with and separate from a static contact 14, when the moving contact 13 contacts with the static contact 14, a circuit is switched on, and the operating mechanism 11 stores energy and keeps balance; the overload protection mechanism unlocks the operating mechanism 11 when the overload occurs, the operating mechanism 11 loses balance and starts to release energy and drives the moving contact 13 and the static contact 14 to be separated to break a circuit, and the circuit is protected.

As shown in fig. 1 to 3, the overload protection mechanism includes a bimetal 41, the indication mechanism includes a connecting member 42 connected to the bimetal 41, and a metal probe 52 disposed at one side of the bimetal 41, the connecting member 42 and the metal probe 52 are electrically connected to a circuit board, respectively, the bimetal 41 bends to trip the circuit breaker when a line is overloaded and simultaneously contacts or separates from the metal probe 52, and the bimetal 41 turns on or off a loop in which the metal probe and the connecting member are located to generate a detection signal.

The utility model discloses a circuit breaker with overload dropout detects function, connecting piece and metal probe are connected with the bimetallic strip respectively, and the bimetallic strip triggers circuit breaker tripping operation and bimetallic strip and metal probe contact or separation during overload, and the return circuit that switches on or breaks off metal probe and connecting piece place by the bimetallic strip produces the detected signal, gets overload protection and the effect of instructing the trouble simultaneously, has the characteristics of the reliability height and simple structure.

The circuit breaker comprises a short-circuit protection mechanism and an overload protection mechanism, the short-circuit protection mechanism can unlock the operating mechanism 11 to drive the circuit breaker to trip in the short-circuit process, and the overload protection mechanism can unlock the operating mechanism 11 to drive the circuit breaker to trip in the overload process. The indicating mechanism comprises a connecting piece 42 connected with the bimetallic strip 41 and a metal probe 52 arranged on one side of the bimetallic strip 41, wherein the connecting piece 42 and the metal probe 52 are respectively electrically connected with a circuit board, the bimetallic strip 41 is bent to make the circuit breaker trip when a circuit is overloaded and simultaneously contact or separate with the metal probe 52, the bimetallic strip conducts or breaks a loop where the metal probe and the connecting piece are located to generate a detection signal, if the circuit breaker trips, the indicating mechanism indicates whether the fault problem is overload fault or not, and if the fault problem is not overload fault, the circuit fault is short-circuit fault.

The bimetal 41 and the metal probe 52 may be disposed at an interval, and when the bimetal 41 contacts the metal probe 52, a loop where the metal probe 52 is located is turned on to generate a detection signal, or of course, the bimetal 41 and the metal probe 52 may keep continuous contact, and when the bimetal 41 and the metal probe 52 are separated, the loop where the metal probe 52 is located is turned off to generate a detection signal. In addition, the circuit breaker may also include other protection structures, such as a mechanism with leakage protection and under-voltage protection, which all belong to the protection scope of the present invention.

Specifically, as shown in fig. 1 to 3, the indicating mechanism includes a metal probe 52, the metal probe 52 is disposed at one side of the bending direction of the bimetal 41, and the bimetal 41 contacts the metal probe 52 when being overloaded, so that the metal probe 52 and the connecting member 42 are conducted to generate a detection signal. Of course, the metal probe 52 may be disposed on the back side of the bending direction of the bimetal 41, and when the bimetal is bent due to overload, the metal probe 52 is separated from the bimetal, and the circuit between the metal probe 52 and the connecting member 42 is broken, thereby generating a detection signal. The overload protection mechanism comprises a bimetallic strip 41, the bimetallic strip 41 comprises a fixed part 41a arranged at one end and connected with an arc striking plate 43, and a bent part 41b arranged at the other end and matched with the operating mechanism 11, the bent part 41b is connected with the movable contact 13 through a first connecting piece 55, the arc striking plate 43 is connected with the wiring terminal 15 through a second connecting piece 56, the indicating mechanism comprises a connecting piece 42 connected with the fixed part 41a, and metal probes 52 arranged at one side of the bending direction of the bimetallic strip 41 at intervals, the connecting piece 42 and the metal probes 52 are respectively connected with a circuit board, and the bimetallic strip 41 is bent when a circuit is overloaded so as to trip the circuit breaker and simultaneously contacts with the metal probes 52.

Further, the circuit breaker includes a plurality of casings that set up side by side, is equipped with curb plate 53 between two adjacent casings the circuit board is installed respectively at two adjacent casings with overload protection mechanism, and is equipped with a plurality of mounting holes respectively with metal probe 52 and connecting piece 42 complex on the curb plate 53 between two adjacent casings, and the one end of metal probe 52 and connecting piece 42 is connected with the circuit board respectively, and the other end of metal probe 52 passes curb plate 53 respectively and stretches to one side of bimetallic strip 41. When the two housings are closed box-shaped, the side plates 53 are the respective side walls of the two housings, and when the two housings are half box-shaped open to one side, the side plates 53 are independent baffle plates provided between the two housings. Through installing circuit board and overload protection mechanism in two different casings respectively, have simple to operate's characteristics, the mounting hole on curb plate 53 can also play spacing effect to metal probe 52 between two casings moreover, effectively utilizes limited space in the circuit breaker casing, can compact circuit breaker's structure and reduce the volume of circuit breaker.

Further, an adjusting screw 45 matched with the fixing portion 41a is arranged in the shell, the adjusting screw 45 and the arc striking plate 43 are respectively and oppositely arranged on two sides of the fixing portion 41a, the adjusting screw 45 can push the fixing portion 41a to enable the bimetallic strip 41 to swing, and the connecting piece 42 is connected with the arc striking plate 43. By providing the striking plate 43 and the adjusting screw 45 on both sides of the fixing portion 41a, not only the initial position of the bimetal 41 can be adjusted, but also interference with the adjusting screw 45 can be avoided by connecting the connecting member 42 with the striking plate 43.

Furthermore, a first through hole matched with the metal probe 52 and a second through hole 54b matched with the connecting piece 42 are arranged on the side plate 53, the connecting piece 42 penetrates through the second through hole 54b to be connected with one end of the bimetallic strip 41, and the metal probe 52 penetrates through the second through hole 54b to extend to one side of the other end of the bimetallic strip 41 to be matched; the side plate 53 is provided with a limiting boss 54a at one side of the first through hole, which is far away from the bimetal 41, and a limiting groove is arranged at the side surface of the limiting boss 54a, and the limiting groove is matched with the side surface of the metal probe 52, which is far away from the bimetal 41.

Further, the arc striking plate 43 includes an installation portion 43b, and an elastic portion 43a and a bending portion 43c respectively connected to two ends of the installation portion 43b, where the installation portion 43b is provided with a plug connector, the housing is provided with a plugging slot 330 matching with the plug connector, the elastic portion 43a is in a zigzag structure, one end of the elastic portion 43a is connected to the fixing portion 41a, the other end of the elastic portion 43a is connected to the installation portion 43b, the bending portion 43c is in an arc-shaped structure, one end of the bending portion 43c is matched with the movable contact 13, and the other end of the bending portion 43c is matched with the arc extinguishing chamber 16.

Further, the circuit board includes a remote communication module and/or an indication circuit, and when the metal probe 52 inputs a detection signal to the circuit board, the circuit board may transmit the detection signal to the monitoring terminal through the remote communication module, or the indication circuit indicates through an LED or a buzzer.

Referring to fig. 1, an embodiment of the operating mechanism 11 is shown, said operating mechanism 11 comprising a rocker arm 111 pivotally mounted in a housing, a spring connected to the rocker arm 111, and a jump buckle 112 and a lock catch 113 respectively pivoted on the rocker arm 111, wherein the jump buckle 112 and the lock catch 113 are mutually in snap fit, the lock catch 113 is connected with the handle 12 through a connecting rod 114, the movable contact 13 is connected with the rocker arm 111, the overload protection mechanism is arranged on one side of the jump buckle 112, and a pull rod 116 matched with the overload protection mechanism is arranged on the jump buckle 112, when the jump buckle 112 is in snap fit with the lock catch 113, the handle 12 can drive the rocker arm 111 to drive the movable contact 13 to contact with the fixed contact 14, and the compression spring of the rocker arm 111 is in balance, the short-circuit protection mechanism and the overload protection mechanism can respectively drive the tripping buckle 112 and the lock catch 113 to trip, so that the rocker arm loses balance and drives the moving contact 13 and the static contact 14 to be separated under the action of the spring.

Referring to fig. 1, an embodiment of the circuit breaker is shown, the movable contact 13 is disposed opposite to the fixed contact 14, the short-circuit protection mechanism is disposed on the left side of the fixed contact 14, the operating mechanism 11 is disposed above the movable contact 13, the overload protection mechanism is disposed on the right side of the operating mechanism 11, an arc extinguish chamber 19 is disposed below the short-circuit protection mechanism, a handle 12 connected to the operating mechanism 11 is disposed above the short-circuit protection mechanism, and two connection terminals 15 are disposed at the left end and the right end of the housing, respectively.

Further, a closing limiting arm 6 is arranged in the handle 12, one end of the closing limiting arm 6 is rotatably installed on a rotating shaft of the handle 12, an arc-shaped surface 62 matched with the rocker arm 111 is arranged at the other end of the closing limiting arm, a curved elastic arm 61 is arranged on one side of the arc-shaped surface 62, in the closing rotating process, the closing limiting arm 6 rotates along with the handle, the arc-shaped surface 62 is in contact sliding fit with the rocker arm 111, the rocker arm 111 is limited firstly, the rocker arm 111 is limited, the rotation of the rocker arm 111 in the closing direction is limited, meanwhile, the spring on the rocker arm 111 stores energy, along with the rotation of the handle, the arc-shaped surface 62 of the closing limiting arm 6 and the sliding of the rocker arm 111 cross a limit position, the arc-shaped surface 62 of the closing limiting arm 6.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The utility model provides a circuit breaker with overload dropout detects function which characterized in that: including the casing and set up operating device (11) in the casing, overload protection mechanism and indicating mechanism, overload protection mechanism includes bimetallic strip (41), indicating mechanism includes connecting piece (42) and metal probe (52), connecting piece (42) and metal probe (52) are connected with the circuit board electricity respectively, when the circuit transships, bimetallic strip (41) are crooked and are contacted or are separated with connecting piece (42) and/or metal probe (52), bimetallic strip (41) switch on or break off connecting piece (42) and the return circuit production detection signal that metal probe (52) place.

2. The circuit breaker with overload trip detection function according to claim 1, wherein: the circuit breaker is characterized in that the connecting piece (42) is fixedly connected with one end of the bimetallic strip (41), the metal probe (52) is arranged on one side of the other end of the bimetallic strip (41), and the bimetallic strip (41) trips when a circuit is overloaded and is in contact with the metal probe (52) to conduct the metal probe (52) and the connecting piece (42) to generate a detection signal.

3. The circuit breaker with overload trip detection function according to claim 1, wherein: the circuit breaker includes two at least casings that set up side by side, circuit board and overload protection mechanism are installed respectively in two adjacent casings, and are equipped with a plurality of respectively on curb plate (53) between two adjacent casings with metal probe (52) complex mounting hole, the one end and the circuit board of metal probe (52) are connected, the other end of metal probe (52) passes curb plate (53) and stretches to one side of bimetallic strip (41).

4. The circuit breaker with overload trip detection function according to claim 1, wherein: the wiring board includes a telecommunications module and/or an indicator circuit.

5. The circuit breaker with overload trip detection function according to claim 1, wherein: the bimetallic strip (41) comprises a fixing part (41a) arranged at one end and a bending part (41b) arranged at the other end and matched with the operating mechanism (11), the indicating mechanism comprises a connecting piece (42) connected with the fixing part (41a) and metal probes (52) arranged at one side of the bending direction of the bimetallic strip (41) at intervals, the connecting piece (42) and the metal probes (52) are respectively connected with a circuit board, and the bimetallic strip (41) is bent to be in contact with the metal probes (52) when being overloaded.

6. The circuit breaker with overload trip detection function according to claim 5, wherein: an adjusting screw (45) matched with the fixing part (41a) is arranged in the shell, and the adjusting screw (45) can push the fixing part (41a) to enable the bimetallic strip (41) to swing.

7. The circuit breaker with overload trip detection function according to claim 3, wherein: the side plate (53) is provided with a first through hole matched with the metal probe (52) and a second through hole matched with the connecting piece (42), the connecting piece (42) penetrates through the second through hole (54b) to be connected with one end of the bimetallic strip (41), and the metal probe (52) penetrates through the second through hole (54b) to extend to one side of the other end of the bimetallic strip (41) to be matched; the side plate (53) is provided with a limiting boss (54a) on one side of the first through hole, which is far away from the bimetallic strip (41), the side face of the limiting boss (54a) is provided with a limiting groove, and the limiting groove is matched with the side face, which is far away from the bimetallic strip (41), of the metal probe (52).

8. The circuit breaker with overload trip detection function according to claim 1, wherein: the connecting piece (42) is fixedly connected with one end of the bimetallic strip (41), the metal probe (52) is arranged on the back side of the bending direction of the bimetallic strip (41), and the bimetallic strip (41) is separated from the metal probe (52) when being overloaded to generate a detection signal.

9. The circuit breaker with overload trip detection function according to claim 1, wherein: the device also comprises a short-circuit protection mechanism, and the bimetallic strip (41) unlocks the operating mechanism (11) when the short-circuit protection mechanism is overloaded; the operating mechanism (11) comprises a rocker arm (111) which is pivotally arranged in the shell, a spring which is connected with the rocker arm (111), a jump buckle (112) and a lock catch (113) which are respectively pivotally arranged on the rocker arm (111), the jump buckle (112) and the lock catch (113) are mutually in hasp fit, the lock catch (113) is connected with the handle (12) through a connecting rod (114), the moving contact (13) is connected with the rocker arm (111), the overload protection mechanism is arranged on one side of the jump buckle (112), a pull rod (116) which is matched with the overload protection mechanism is arranged on the jump buckle (112), when the jump buckle (112) is in hasp fit with the lock catch (113), the handle (12) can drive the rocker arm (111) to drive the moving contact (13) to be contacted with the static contact (14), the compression springs of the rocker arm (111) are balanced, and the short-circuit protection mechanism and the overload protection mechanism can respectively drive the jump buckle (112) to be unlocked, the rocker arm is out of balance and drives the moving contact (13) and the static contact (14) to be separated under the action of the spring.

10. The circuit breaker with overload trip detection function according to claim 9, wherein: be equipped with spacing arm of combined floodgate (6) in handle (12), spacing arm of combined floodgate (6) one end is rotated and is installed in the pivot of handle (12), the other end is equipped with arc face (62) with rocking arm (111) complex, one side of arc face (62) is equipped with bent type elastic arm (61), during the combined floodgate, spacing arm of combined floodgate (6) rotates along with the handle, its arc face (62) and rocking arm (111) contact sliding fit, make the spring energy storage on rocking arm (111) simultaneously to rocking arm (111) earlier, slide in arc face (62) of spacing arm of combined floodgate (6) and rocking arm (111) and cross a limit position after, the restriction to rocking arm (111) is removed in arc face (62), rocking arm (111) are closed fast under the drive of the energy storage of spring.

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