CN218918750U - Overload alarm non-tripping device and circuit breaker - Google Patents

Abstract

The overload alarming non-tripping device comprises a support opposite to a bimetal assembly, wherein a micro switch is fixedly assembled on the support, a push rod is arranged between the micro switch and the bimetal assembly, a first end of the push rod is inserted into a movable end of the bimetal assembly, a second end side surface of the push rod is driven by the bimetal assembly to be in sliding fit with the micro switch, a triggering part is arranged on the second end side surface of the push rod, and when overload faults occur, the triggering part slides to press a button to switch the state of the micro switch. A circuit breaker comprises a shell, wherein at least one group of bimetal assemblies are arranged in the shell, and the overload alarming non-tripping device is arranged in the shell. The push rod adopts an integrated structure, the first end of the push rod is spliced with the movable end of the bimetal assembly, the side surface of the second end of the push rod is provided with the trigger part, and the bimetal assembly directly drives the push rod to trigger the micro-switch to switch the state, so that the push rod has the advantages of stable structure, simple assembly process and high reliability.

Description

Overload alarm non-tripping device and circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to an overload alarm non-tripping device and a circuit breaker.

Background

The low-voltage circuit breaker is also called a low-voltage automatic switch and is mainly used for switching on or off a circuit infrequently, the low-voltage circuit breaker has overload, short circuit and voltage loss protection effects, when overload, short circuit and voltage reduction or disappearance occur in the circuit, the circuit breaker can automatically switch off the circuit within a specified time so as to protect a power line and power equipment, but in an important distribution line, if the circuit breaker automatically switches off the circuit due to overload in the circuit, great economic loss is often caused, therefore, when the circuit breaker is required to send an alarm to replace the automatic circuit switching off when overload occurs in the circuit, a user can remove faults in the circuit as soon as possible, so that the economic loss caused by the sudden switching off of the circuit is avoided, however, in the conventional overload alarm non-tripping device, a driving structure connected between a bimetal assembly and a micro switch generally comprises an insulating sleeve and a pull rod, the micro switch is triggered in a pull-push mode, the occupied space is large, the insulating sleeve and the pull rod is in a split structure, and the connection stability between the insulating sleeve and the pull rod is influenced after the service time is long.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an overload alarm non-tripping device and a circuit breaker which are simple in structure and high in reliability.

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

the overload alarming non-tripping device comprises a support opposite to a bimetal assembly, wherein a micro switch is fixedly assembled on the support, a push rod is arranged between the micro switch and the bimetal assembly, a first end of the push rod is inserted into a movable end of the bimetal assembly, a second end side surface of the push rod is driven by the bimetal assembly to be in sliding fit with the micro switch, a triggering part is arranged on the second end side surface of the push rod, and when overload faults occur, the triggering part slides to press a button to switch the state of the micro switch.

Further, the second end side face of the push rod is further provided with an avoidance groove, when overload faults do not occur, the button falls into the avoidance groove, when overload faults occur, the trigger part is matched with the button of the micro switch, and a transition inclined plane is connected between the trigger part and the avoidance groove.

Further, a slot is arranged at the end part of the first end of the push rod, and the movable end of the bimetal assembly is inserted into the slot.

Further, the button is located on the side face of the micro switch, and the pressing direction of the button is perpendicular to the sliding direction of the push rod.

Further, the support is provided with a chute, the button of the micro switch is opposite to the chute, and the push rod slides in the chute under the drive of the bimetal assembly.

Further, the support is provided with a guide groove, and the middle part of the push rod penetrates through the guide groove to be in sliding fit with the support.

Further, the push rod comprises a first connecting section and a second connecting section which are parallel to each other, one end of the first connecting section is used as a first end of the push rod and is provided with a step-shaped connecting block, the side surface of the connecting block is provided with a slot, the other end of the first connecting section is in transitional connection with one end of the second connecting section through a connecting inclined plane,

the side face of the other end of the second connecting section is provided with an avoidance groove, the side face of the second connecting section, which is close to the avoidance groove, is used as a triggering part, the triggering part is a plane, and the side wall of the avoidance groove connected between the triggering part and the avoidance groove is a transitional inclined plane.

Further, the support comprises a support plate and at least one baffle, the baffle is vertically connected with one side of the support plate, a guide groove penetrating through the baffle is formed in one side of the baffle, a sliding groove is formed in the surface of the support plate corresponding to the guide groove, a mounting groove is formed in the surface of the support plate adjacent to the sliding groove and the baffle, and the microswitch is assembled in the mounting groove and enables a button of the microswitch to be opposite to the triggering part.

The utility model also provides a circuit breaker, which comprises a shell, wherein at least one group of bimetal components are arranged in the shell, and the overload alarming non-tripping device is arranged in the shell.

Preferably, at least one partition board is arranged in the shell, the space in the shell is divided into at least two parallel mounting cavities by the partition board, a group of bimetal assemblies are arranged in each mounting cavity, and the support is fixedly connected with the partition board.

The overload alarm non-tripping device and the circuit breaker have the advantages that the push rod adopts an integrated structure, the first end of the push rod is inserted into the movable end of the bimetal assembly, the side surface of the second end of the push rod is in sliding fit with the micro switch, the side surface of the second end of the push rod is provided with the triggering part, and the bimetal assembly directly drives the push rod to trigger the micro switch to switch the state, so that the overload alarm non-tripping device and the circuit breaker have the advantages of stable structure, simple assembly process and high reliability.

In addition, the push rod is further provided with an avoidance groove, when overload faults do not occur, the avoidance groove is opposite to the push button, the push button is prevented from being triggered by other components by mistake, and particularly, a transition inclined plane is connected between the triggering part and the avoidance groove, so that the push rod and the push button are prevented from being blocked in the matching process.

In addition, support and push rod sliding fit are provided with push rod complex spout, guide way at the support, and especially, the push rod still sets up spacing portion, can restrict the sliding travel of push rod by spacing portion and guide way cooperation, do benefit to the cooperation stability of assurance push rod and micro-gap switch.

Drawings

FIG. 1 is a schematic diagram of the overload alert non-trip apparatus of the present utility model in the absence of an overload fault;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic diagram of the overload warning apparatus of the present utility model in the event of an overload fault;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic view of the structure of the push rod and the bracket according to the present utility model;

FIG. 6 is a schematic view of the structure of the bracket of the present utility model;

FIG. 7 is a schematic illustration of a putter in accordance with the present utility model (including a slot);

FIG. 8 is a schematic view of the structure of the push rod of the present utility model;

fig. 9 is a schematic structural view of a micro switch in the present utility model.

Detailed Description

Embodiments of the overload warning trip apparatus and circuit breaker of the present utility model are further described below with reference to the examples shown in fig. 1-9. The overload warning non-trip apparatus and the circuit breaker of the present utility model are not limited to the description of the following embodiments.

The overload alarm non-tripping device comprises a bracket 2 opposite to a bimetal assembly 1, wherein a micro switch 4 is fixedly assembled on the bracket 2, a push rod 3 is arranged between the micro switch 4 and the bimetal assembly 1, the push rod 3 is of an integrated structure, a first end of the push rod 3 is inserted into a movable end of the bimetal assembly 1, a second end side surface of the push rod 3 is driven by the bimetal assembly 1 to be in sliding fit with the micro switch 4, a triggering part 321 is arranged on the second end side surface of the push rod 3, and when overload faults occur, the triggering part 321 presses a button 41, so that the micro switch 4 is triggered to switch on or off. According to the overload alarm non-tripping device and the circuit breaker, the push rod 3 adopts an integrated structure, the first end of the push rod 3 is inserted into the movable end of the bimetal assembly 1, the side surface of the second end of the push rod is in sliding fit with the micro switch, the side surface of the second end of the push rod 3 is provided with the triggering part 321, and the bimetal assembly 1 directly drives the push rod 3 to trigger the micro switch 4 to switch states, so that the overload alarm non-tripping device has the advantages of stable structure, simple assembly process and high reliability.

An embodiment of a circuit breaker is provided in connection with fig. 1-9, in which an overload warning non-trip apparatus is cooperatively disposed.

As shown in fig. 1-4, the circuit breaker includes a housing 5, at least one phase of main circuit is disposed in the housing 5, preferably, at least one partition plate 51 is disposed in the housing 5, the partition plate 51 divides a space in the housing 5 into at least two parallel installation cavities, a group of main circuits is correspondingly assembled in each installation cavity, in this embodiment, two partition plates 51 are disposed in the housing 5, the two partition plates 51 divide the space in the housing 5 into three installation cavities in parallel, and one phase of main circuit is assembled in each installation cavity.

Specifically, each phase main circuit comprises a pair of wiring terminals and a contact mechanism connected with the wiring terminals, wherein the contact mechanism comprises a moving contact and a fixed contact which are mutually matched, the fixed contact is fixed in a shell 5, the moving contact is in linkage connection with an operating mechanism arranged in the shell 5, and the operating mechanism drives the moving contact to contact with or separate from the fixed contact, so that the switching-on and switching-off actions (wiring terminals, contact mechanisms, operating mechanisms and handle mechanisms are not shown) of the circuit breaker are realized; each phase main circuit is also connected with an overload protection device, in the embodiment, the overload protection device is a bimetal assembly 1, one end of the bimetal assembly 1 is fixedly connected with the shell 5, the bimetal assembly 1 is vertically fixed on the bottom wall of the shell 5, and when overload faults occur, the other end of the bimetal assembly 1 is heated and bent, and the working principle and the assembly position of the bimetal assembly belong to the prior art.

The overload protection device is characterized in that overload alarm non-tripping devices are further arranged in the shell 5, preferably each overload protection device corresponds to one overload alarm non-tripping device, each overload alarm non-tripping device comprises a support 2, a micro switch 4 and a push rod 3, wherein the supports 2 are fixed in the shell 5 and are used for providing assembly positions for the micro switch 4, one side of each support 2, which is located on the bimetallic assembly 1, is opposite to the bimetallic assembly 1 at intervals, preferably the alarm non-tripping devices share one support 2, so that space in the shell 5 is saved, the micro switch 4 and the bimetallic assembly 1 are fixed in the support 2 in a one-to-one correspondence manner, the micro switch 4 corresponds to one group of alarm lines, the push rod 3 is located between the micro switch 4 and the bimetallic assembly 1, a first end of the push rod 3 is spliced with a movable end (the upper end of the bimetallic assembly 1 in fig. 1-4), a second end of the push rod 3 is opposite to a button 41 of the micro switch 4 and is used for being matched with a button 41 of the micro switch 4, in the embodiment, a trigger part 321 is arranged at the side of the second end of each micro switch 3, when a fault occurs, the micro switch 1 is driven by the side of the bimetallic assembly 1, the second end is matched with the micro switch 3, the second end of the micro switch 3 is matched with the corresponding to the micro switch 3, and the corresponding to the micro switch 3 is in a sliding switch 4, or the overload alarm line is triggered, and the overload state is indicated to be opened, or the overload state is indicated.

Preferably, the first end of the push rod 3 is provided with a slot 312, the movable end of the bimetal assembly 1 is inserted into the slot 312, of course, the movable end of the bimetal assembly 1 can also be provided with the slot 312, the first end of the push rod 3 is inserted into the slot 312, but the slot 312 is arranged on the bimetal assembly 1, which is not beneficial to ensuring the functional stability of the bimetal assembly 1; the trigger part 321 and the avoidance groove 322 are simultaneously arranged on the side surface of the push rod 3 in sliding fit with the micro switch 4, when overload faults do not occur, the button 41 of the micro switch 4 falls into the avoidance groove 322, the button 41 is prevented from being triggered by other parts in the circuit breaker by mistake, when overload faults occur, the trigger part 321 is matched with the button 41 of the micro switch 4, preferably, a transition inclined plane 323 is connected between the trigger part 321 and the avoidance groove 322, the transition inclined plane 323 is positioned on one side of the avoidance groove 322 far away from the first end of the push rod 3, and the transition inclined plane 323 ensures the smoothness of the button 41 matched with the push rod 3 in the switching state and prevents the clamping stagnation phenomenon in the matching process.

In this embodiment, the button 41 is located on the side of the micro switch 4, the pressing direction of the button 41 is perpendicular to the sliding direction of the push rod 3, when the micro switch 4 is assembled on the bracket 2, the button 41 may be located on the side of the micro switch 4 opposite to the bracket 2 (i.e. the upper surface of the micro switch 4 in fig. 2 and 4), or may be located on two sides of the micro switch 4 (i.e. the left side or the right side of the micro switch 4 in fig. 2 and 4), and generally the button 41 corresponds to the middle of the bracket 1, so that the matching process of the trigger portion 321 and the button 41 does not exceed the outside of the bracket 2, which is beneficial to saving space.

Preferably, the bracket 2 is provided with a sliding groove 211, the button 41 of the micro switch 4 is opposite to the sliding groove 211, and the triggering part 321 of the push rod 3 which is in sliding fit with the micro switch 4 can be matched with the button 41; further, the bracket 2 is further provided with a guide groove 221, the middle part of the push rod 3 passes through the guide groove 221, and the push rod 3 can be in sliding fit with the bracket 2 under the driving of the bimetal assembly 1, namely in sliding fit with the sliding groove 211, so as to prevent excessive shaking from being generated in the process of matching the push rod 3 with the micro switch 4, and poor matching is caused; further, the middle part of the push rod 3 may be provided with a limiting part, which may be a boss, an inclined plane or other structures, and the limiting part may be matched with the edge of the guiding groove 221, so as to limit the sliding travel of the push rod 3, or of course, the guiding groove 221 may be omitted, or the push rod 3 may be opposite to the support 2 at intervals, so that the push rod 3 and the support 2 may not have sliding contact.

The structure of the bracket 2 of this embodiment is provided in combination with fig. 1 to 6, the bracket 2 includes a support plate 21 and at least one baffle 22, each baffle 22 is vertically connected with one side of the support plate 21, a guide groove 221 penetrating the baffle 22 is provided on one side of the baffle 22, the guide groove 221 is provided at the lower side edge of the baffle 22, the area of the support plate 21 plate corresponding to the guide groove 221 is used as a chute 211, a push rod 3 passes through the guide groove 221 to slidably contact with the chute 211, a limit part of the push rod 3 cooperates with the edge of the guide groove 221 to limit the sliding travel of the push rod 3, a mounting groove 212 is provided on the plate surface of the support plate 21 adjacent to the chute 211 and the baffle 22, a micro switch 4 is assembled in the mounting groove 212, a button 41 of the micro switch 4 is correspondingly positioned on one side facing the chute 211, the micro-switches 4 are fixedly assembled in the mounting grooves 212 through fastening screws, in this embodiment, the micro-switches 4 corresponding to the three groups of the bimetal assemblies 1 share one supporting plate 21, that is, three baffle plates 22 are arranged on the supporting plate 21 at intervals, guide grooves 221 are arranged on the same side of the three baffle plates 22, three sliding grooves 211 are arranged on the same side of the three mounting grooves 212, each sliding groove 211 is formed by the plate surface of the supporting plate 21, the groove bottom of each sliding groove 211 and the groove bottom of the mounting groove 212 form a step surface, the plate surface of the supporting plate 21 can be provided with grooves serving as the sliding grooves 211, screw holes are formed in the supporting plate 21 and the partition plate 51, and the supporting plate 21 is fixed in the housing 5 through assembling screws in the screw holes.

In combination with fig. 5, 7 and 8, the structure of the push rod 3 in this embodiment is provided, the push rod 3 includes a first connection section 31 and a second connection section 32 that are parallel to each other, a step-shaped connection block 311 is provided at one end of the first connection section 31 as a first end of the push rod 3, a slot 312 is provided at a side surface of the connection block 311, in fig. 7, an opening of the slot 312 is located at a lower side surface of the connection block 311, so as to facilitate plugging with a movable end of the bimetal assembly 1, of course, the opening of the slot 312 may also be located at two sides of the connection block 311, the other end of the first connection section 31 is connected with one end of the second connection section 32 through a connection inclined surface 324 to make the whole push rod 3 in a zigzag shape, in this embodiment, the connection inclined surface 324 is used as a limiting portion to cooperate with the guide groove 221, that is, a connection inclined surface 324 cooperates with an upper side edge of the guide groove 221 to limit a sliding travel of the push rod 3, an avoidance groove 322 is provided at the other end side surface of the second connection section 32, the avoidance groove 322 is located at a lower side surface of the connection inclined surface 324 and is not in the same plane, the avoidance groove 322, the groove depth of the avoidance groove 322 is greater than or equal to the projection 321 of the push button 41, and the second connection section 321 is also in the same plane 321 as the trigger section 32, and the trigger section 32 is in the transition section 32, and the trigger section is in the plane 321. In addition, the side surface of the push rod 3 may not be provided with the escape groove 322, at this time, the length of the second connecting section 32 may be appropriately shortened, and when an overload failure does not occur, the trigger portion 321 is engaged with the side surface of the micro switch 4, but the trigger portion 321 is not engaged with the button 41, the trigger portion 321 is located between the button 41 and the bimetal assembly 1, and after the overload failure occurs, the trigger portion 321 is driven to press the button 41 to switch the state of the micro switch 4.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. Overload warning trip unit, including support (2) relative with bimetal subassembly (1) fixedly mounted with micro-gap switch (4) on support (2), be provided with push rod (3), its characterized in that between micro-gap switch (4) and bimetal subassembly (1): the first end of push rod (3) is pegged graft with the expansion end of bimetal subassembly (1), by bimetal subassembly (1) drive push rod (3) second end side and micro-gap switch (4) sliding fit, the second end side of push rod (3) is equipped with trigger portion (321), when taking place overload trouble, trigger portion (321) slides and presses button (41) in order to switch the state of micro-gap switch (4).

2. The overload warning apparatus as claimed in claim 1, wherein: the second end side of push rod (3) still is equipped with dodges groove (322), when not taking place overload trouble, in button (41) falls into dodge groove (322), when taking place overload trouble, by trigger part (321) and the cooperation of button (41) of micro-gap switch (4), be connected with transition inclined plane (323) between trigger part (321) and dodge groove (322).

3. The overload warning apparatus as claimed in claim 1, wherein: the first end part of the push rod (3) is provided with a slot (312), and the movable end of the bimetal assembly (1) is inserted into the slot (312).

4. The overload warning apparatus as claimed in claim 1, wherein: the button (41) is positioned on the side surface of the micro switch (4), and the pressing direction of the button (41) is perpendicular to the sliding direction of the push rod (3).

5. The overload warning apparatus as claimed in claim 1, wherein: the support (2) is provided with a chute (211), a button (41) of the micro switch (4) is opposite to the chute (211), and the push rod (3) slides in the chute (211) under the drive of the bimetal assembly (1).

6. The overload warning apparatus as claimed in claim 1, wherein: the support (2) is provided with a guide groove (221), and the middle part of the push rod (3) penetrates through the guide groove (221) to be in sliding fit with the support (2).

7. The overload warning apparatus as claimed in claim 1, wherein: the push rod (3) comprises a first connecting section (31) and a second connecting section (32) which are parallel to each other, one end of the first connecting section (31) is used as a first end of the push rod (3) and is provided with a step-shaped connecting block (311), the side surface of the connecting block (311) is provided with a slot (312), the other end of the first connecting section (31) is in transitional connection with one end of the second connecting section (32) through a connecting inclined plane (324),

the side surface of the other end of the second connecting section (32) is provided with an avoidance groove (322), the side surface of the second connecting section (32) adjacent to the avoidance groove (322) is used as a triggering part (321), the triggering part (321) is a plane, and the side wall of the avoidance groove (322) connected between the triggering part (321) and the avoidance groove (322) is a transition inclined plane (323).

8. The overload warning apparatus as claimed in claim 1, wherein: support (2) are including backup pad (21) and at least one baffle (22), baffle (22) are connected perpendicularly with one side of backup pad (21), have seted up guide way (221) that link up baffle (22) in one side of baffle (22), have seted up spout (211) in backup pad (21) face of corresponding guide way (221), are equipped with mounting groove (212) in backup pad (21) face of next-door neighbour spout (211) and baffle (22), and micro-gap switch (4) assemble in mounting groove (212) and make button (41) and trigger part (321) of micro-gap switch (4) relative.

9. Circuit breaker comprising a housing (5), in which housing (5) at least one set of bimetallic assemblies (1) is arranged, characterized in that: an overload warning non-trip apparatus as claimed in any one of claims 1 to 8 is provided within said housing (5).

10. The circuit breaker according to claim 9, characterized in that: at least one partition plate (51) is arranged in the shell (5), the space in the shell (5) is divided into at least two parallel mounting cavities by the partition plate (51), a group of bimetal assemblies (1) are arranged in each mounting cavity, and the support (2) is fixedly connected with the partition plate (51).

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