CN217061983U - Circuit breaker and auxiliary contact module - Google Patents

Abstract

An auxiliary contact module comprises a base and an auxiliary contact assembly assembled in the base, wherein the auxiliary contact assembly comprises a circuit board, an auxiliary contact connected to the circuit board and a transmission mechanism used for driving the auxiliary contact to be in a switching state, the transmission mechanism comprises a first pushing piece, a second pushing piece and an elastic piece arranged between the first pushing piece and the second pushing piece, the first pushing piece drives the second pushing piece to slide along the base under the driving of an action mechanism, after the auxiliary contact is triggered by the second pushing piece to be in the switching state, the second pushing piece is limited by the base, the first pushing piece continues to slide, and the elastic piece generates elastic deformation to make up the stroke difference between the first pushing piece and the second pushing piece. The utility model discloses well auxiliary contact subassembly's first impeller and second impeller compensate the stroke difference through the elastic component, can adjust the stroke difference between the actuating mechanism of auxiliary contact subassembly and circuit breaker with this, improve the cooperation degree, reinforcing reliability.

Description

Circuit breaker and auxiliary contact module

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to circuit breaker and supplementary contact module.

Background

At present, the auxiliary contact in the existing circuit breaker adopts the structural forms of a conventional contact, a leaf spring, a contact plate and the like to realize the closing and opening operations of an auxiliary circuit, and the conductive piece of the existing structure is easy to oxidize and corrode under the harsh environment, so that the weak current connection capability and the poor reliability of the closing and opening operations of the auxiliary contact are caused, and the phenomenon of signal loss occasionally occurs within the mechanical service life times required by the product.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker, it possesses the high auxiliary contact module of reliability.

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

an auxiliary contact module comprises a base and an auxiliary contact assembly assembled in the base, wherein the auxiliary contact assembly comprises a circuit board, an auxiliary contact connected to the circuit board and a transmission mechanism used for driving the auxiliary contact to be in a switching state, the transmission mechanism comprises a first pushing piece, a second pushing piece and an elastic piece arranged between the first pushing piece and the second pushing piece, the first pushing piece drives the second pushing piece to slide along the base under the driving of an action mechanism, after the auxiliary contact is triggered by the second pushing piece to be in the switching state, the second pushing piece is limited by the base, the first pushing piece continues to slide, and the elastic piece generates elastic deformation to make up the stroke difference between the first pushing piece and the second pushing piece.

Preferably, the auxiliary contact comprises at least one microswitch, and the second pushing piece switches the normally open state or the normally closed state by triggering the microswitch.

Preferably, the auxiliary contact assembly further comprises a wiring terminal, and the wiring terminal and the auxiliary contact are respectively connected with the circuit board to form a whole.

Preferably, one end of the second pushing member is provided with a holding cavity, and one end of the first pushing member slidably extends into the holding cavity and compresses an elastic member arranged in the holding cavity to make up for a stroke difference between the first pushing member and the second pushing member.

Preferably, the second pushing member is a hollow rod structure with one closed end and one open end, the hollow part of the second pushing member is used as an accommodating cavity for assembling the elastic member, and a pushing arm matched with the auxiliary contact is formed by protruding on one side wall or two opposite sides of the second pushing member.

Preferably, the first pushing member is integrally of a rod structure, a matching portion is formed by protruding one end of the first pushing member, and the matching portion is matched with the side wall of the accommodating cavity to limit the elastic piece.

Preferably, a limiting groove is formed in the middle of the base, the second pushing member is in sliding fit with the limiting groove, and after the second pushing member triggers the switching state of the auxiliary contact, the second pushing member is limited by the limiting groove to continue sliding.

Preferably, one side of the base is provided with a plurality of parallel wiring grooves, a wiring terminal is assembled in each wiring groove, a partition part is arranged in the middle of the base in a protruding mode, a limiting groove is formed in the middle of the partition part, one end of the limiting groove is sealed to serve as the limiting part, the second pushing part is limited in the limiting groove after being abutted to the limiting part, the other end of the limiting groove is opened to enable the first pushing part to extend into the limiting groove to drive the second pushing part, and a through groove is formed in one side wall or two side walls of the limiting groove.

Preferably, the circuit board is arranged between the limiting groove and the wiring groove, at least one auxiliary contact is arranged on one side of the circuit board, which is back to the wiring terminal, the auxiliary contact is at least positioned on one side of the limiting groove, and the wiring terminal adopts an integrated wiring terminal.

The circuit breaker comprises a shell, an action mechanism arranged in the shell and the auxiliary contact module, wherein a base is matched with the shell to form detachable connection, and a transmission mechanism is driven by the action mechanism.

The utility model discloses a circuit breaker and auxiliary contact module, auxiliary contact module can be used for installing with the cooperation of circuit breaker detachable, do benefit to the inspection, change auxiliary contact subassembly, and in addition, auxiliary contact subassembly's first impeller and second impeller compensate the stroke difference through the elastic component, can adjust the stroke difference between the actuating mechanism of auxiliary contact subassembly and circuit breaker with this, improve the cooperation degree, reinforcing reliability.

In addition, the auxiliary contact adopts a microswitch, so that the defect that the contact connection is unreliable due to the pollution of the surface of the contact can be avoided, and the auxiliary contact is connected with a wiring terminal through a circuit board, so that the auxiliary contact has the advantages of convenience in wiring, high reliability, small occupied space and convenience in assembly.

In addition, a limit groove in sliding fit with the second pushing piece is arranged in the base, and an accommodating cavity is arranged in the middle of the second pushing piece, so that the action space of the transmission mechanism is reduced, the matching degree of the transmission mechanism and the auxiliary contact is provided, and the reliability is further improved.

Drawings

Fig. 1 is a schematic structural view of an auxiliary contact (an auxiliary contact) according to the present invention;

FIG. 2 is a schematic structural diagram of the transmission mechanism of the present invention;

fig. 3 is a schematic structural diagram of the auxiliary contact (two auxiliary contacts) in the present invention.

Detailed Description

The following describes a circuit breaker and an auxiliary contact module according to embodiments of the present invention with reference to fig. 1 to 3. The utility model discloses a circuit breaker and auxiliary contact module is not limited to the description of following embodiment.

An auxiliary contact module comprises a base 1 and an auxiliary contact assembly assembled in the base 1, the auxiliary contact assembly is driven by an actuating mechanism of the circuit breaker, the base 1 is matched with a shell of the circuit breaker to form a detachable connection, the auxiliary contact assembly comprises a circuit board 2, an auxiliary contact connected with the circuit board 2 and a transmission mechanism 4 for driving the auxiliary contact to switch states, the transmission mechanism 4 includes a first pushing member 41, a second pushing member 42, and an elastic member 43 disposed between the first pushing member 41 and the second pushing member 42, the first pushing member 41 drives the second pushing member 42 to slide along the base 1 under the driving of the action mechanism, after the auxiliary contact is triggered to switch the state by the second pushing member 42, the second pushing member 42 is limited by the base 1, the first pushing member 41 continues to slide, and the elastic member 43 generates elastic deformation to compensate the stroke difference between the first pushing member 41 and the second pushing member 42.

The utility model discloses a circuit breaker and auxiliary contact module, auxiliary contact module can be used for being connected with circuit breaker detachable, do benefit to the inspection, change auxiliary contact subassembly, and in addition, auxiliary contact subassembly's first impeller 41 compensates the stroke difference through elastic component 43 with second impeller 42, can adjust the stroke difference between the actuating mechanism of auxiliary contact subassembly and circuit breaker with this, improve the cooperation degree, reinforcing reliability.

In an embodiment provided in conjunction with fig. 1-2, the circuit breaker (not shown) includes a housing, and an operating mechanism, a contact mechanism and a wiring assembly are assembled in the housing, the operating mechanism is linked with the contact mechanism, the contact mechanism is wired through the wiring assembly, and the operating mechanism drives the contact mechanism to perform opening and closing actions to connect or disconnect a circuit.

The circuit breaker is characterized in that an auxiliary contact module is further assembled in the shell or on one side of the shell, the auxiliary contact module comprises a base 1 and an auxiliary contact assembly assembled in the base 1, the base 1 can be detachably connected with the shell, the auxiliary contact assembly is driven by an actuating mechanism of the circuit breaker, movable mechanical structures such as an operating mechanism of the circuit breaker, a movable contact of a contact mechanism or a handle and the like can be used as the actuating mechanism for driving the auxiliary contact assembly, in the embodiment, the auxiliary contact assembly is preferably detachably assembled on the base 1, and the auxiliary contact assembly is electrically connected with a wiring assembly of the circuit breaker.

The auxiliary contact assembly comprises a circuit board 2, an auxiliary contact connected to the circuit board 2 and a transmission mechanism 4 for driving the auxiliary contact to switch states, wherein the auxiliary contact comprises a microswitch 3, the microswitch 3 is triggered by a second pushing piece 42 to switch between a normally open state and a normally closed state, and the microswitch 3 can effectively avoid the defect that the contact surface is polluted to cause unreliable contact connection; the transmission mechanism 4 comprises a first pushing member 41, a second pushing member 42 and an elastic member 43 arranged between the first pushing member 41 and the second pushing member 42, when the action mechanism drives the first pushing member 41, the elastic member 43 plays a transmission role, so that the first pushing member 41 can drive the second pushing member 42 to slide along the base 1, preferably, a limit groove 13 is arranged in the base 1, the transmission mechanism 4 performs linear motion in the limit groove 13 of the base 1, after the auxiliary contact is triggered by the second pushing member 42 to switch the state, the second pushing member 42 is limited by the limit groove 13 to form a fixed structure, the first pushing member 41 continues to slide under the driving of the action mechanism, at the moment, the elastic member 43 generates elastic deformation to compensate the stroke difference between the first pushing member 41 and the second pushing member 42, so as to compensate the stroke difference between the auxiliary contact assembly and the action mechanism of the circuit breaker, is beneficial to improving the matching stability. Of course, the limit groove 13 is not arranged in the base 1, so that the transmission mechanism 4 is directly in sliding fit with the side wall of the base 1, the side wall of the base 1 or other parts arranged in the base 1 are matched with the limit second pushing piece 42, so that the second pushing piece 42 is limited in the base 1, and the auxiliary contact can also be driven.

Further, still be equipped with binding post 5 that is used for the wiring in the base 1, binding post 5 is connected with control system electricity, the convenient wiring, and preferred binding post 5, auxiliary contact are connected with circuit board 2 respectively, make binding post 5, auxiliary contact and circuit board 2 form one and do benefit to the whole of assembling in base 1.

As shown in fig. 1, the base 1 is provided with a plurality of parallel wiring slots 11 on one side of the base 1, each wiring slot 11 is provided with one wiring terminal 5, and the base is provided with three wiring slots 11 and three wiring terminals 5; the middle of the base 1 is provided with a partition part 12 in a protruding manner, the middle of the partition part 12 is provided with a limiting groove 13, one end of the limiting groove 13 is sealed to serve as a limiting part, the second pushing part 42 is abutted against the limiting part and then limited in the limiting groove 13 so as not to continue sliding, the other end of the limiting groove 13 is opened so that the first pushing part 41 can extend into the limiting groove 13 to drive the second pushing part 42, a through groove 131 is formed in the side wall of one side of the limiting groove 13, and the through groove 131 is formed in the side wall of the left side of the limiting groove 13 in fig. 1. 2 detachable assemblies of circuit board among the auxiliary contact subassembly are between separation portion 12 and wiring groove 11, also can regard circuit board 2 to assemble between spacing groove 13 and wiring groove 11, three binding post 5 and the welding of one side face of circuit board 2, opposite side face at circuit board 2 is connected with a micro-gap switch 3, micro-gap switch 3 is located one side (left side in figure 1) of spacing groove 13, wherein micro-gap switch 3's trigger part and drive mechanism 4's second impeller 42 cooperation, micro-gap switch 3's three pin welds respectively in circuit board 2's three position, its three position switches on with three binding post 5 respectively, make three binding post 5 duplicate switch's three pin function from this, thereby realize product one normally open a normally closed function.

The specific structure of the transmission mechanism 4 is shown in fig. 2, an accommodating chamber 421 is provided at one end of the second pushing member 42, preferably, the second pushing member 42 is a hollow rod structure with one closed end and one open end, the hollow part of the second pushing member 42 is used as the accommodating chamber 421, the elastic member 43 is a spring assembled in the accommodating chamber 421, one end of the first pushing member 41 slidably extends into the accommodating chamber 421, two ends of the spring are respectively abutted and matched or fixedly connected with one end of the first pushing member 41 and the closed end of the accommodating chamber 421, by compressing the elastic member 43 to compensate for the stroke difference between the first pushing member 41 and the second pushing member 42, a push arm 422 which is matched with the auxiliary contact is formed on the side wall of one side of the second push piece 42, in fig. 1, the pushing arm 422 is located at the left side of the second pushing member 42, and the pushing arm 422 extends out of the through groove 131 of the left side wall of the limiting groove 13 to be matched with the trigger part of the microswitch 3.

The whole first pushing piece 41 is of a rod structure, a matching portion 411 is formed by protruding one end of the first pushing piece 41, the matching portion 411 is of a rod structure in fig. 2, the matching portion 411 is matched with the side wall of the accommodating cavity 421 to limit the maximum deformation amount of the elastic piece 43, when the matching portion 411 contacts with the top of the inner side 421, the deformation amount of the elastic piece 43 reaches the maximum, due to manufacturing and assembling errors, the size of a breaker mechanism module has certain difference, and due to the existence of the elastic piece 43, the auxiliary contact of the scheme can adapt to the difference, and the adaptability of the module is improved.

A second embodiment is provided in conjunction with fig. 2 and 3, in this embodiment, the circuit breaker includes the same housing as the first embodiment, and a contact mechanism, an operating mechanism, a wiring assembly, etc., and the auxiliary contact module is detachably connected to the circuit breaker, wherein a transmission assembly of the auxiliary contact assembly is driven by an actuating mechanism of the circuit breaker, and the wiring terminal 5 is connected to the wiring assembly of the circuit breaker.

The auxiliary contact assembly is similar to the first embodiment, specifically as shown in fig. 3, a wiring groove 11 is provided at one side of the base 1, a wiring terminal 5 is assembled in the wiring groove 11, unlike the first embodiment, the wiring terminal 5 in the present embodiment is an integrated type wiring terminal 5, compared with the first embodiment, the space of the base 1 in the present embodiment is relatively large, two micro switches 3 as auxiliary contacts can be provided in the base 1, a partition portion 12 is provided at the middle portion of the base 1, and a limiting groove 13 identical to the first embodiment is provided at the partition portion 12, but through grooves 131 are respectively provided at two sides of the limiting groove 13, the circuit board 2 is still assembled between the limiting groove 13 and the wiring groove 11, the micro switches 3 and the wiring terminals 5 are respectively connected with the front and back sides of the circuit board 2 to form an integral body, the two micro switches 3 are respectively located at two sides of the limiting groove 13, i.e., the left and right sides of the stopper groove 13 in fig. 3. Of course, the number of the micro switches 3 can be increased according to the size of the space in the base 1, and a plurality of micro switches 3 can be located on the same side of the limiting groove 13 or distributed on two sides of the limiting groove 13.

As shown in fig. 2 and 3, the transmission mechanism 4 of the present embodiment includes a first pushing member 41, an elastic member 43, and a second pushing member 42 which are the same as the first embodiment, wherein pushing arms 422 are disposed on two opposite sides of the second pushing member 42, each pushing arm 422 respectively and correspondingly protrudes from the through slot 131 on two sides of the limiting slot 13, and each pushing arm 422 respectively drives one micro switch 3 to realize switching between a normally open state and a normally closed state.

In the two embodiments, when the actuating mechanism applies force to the first pushing member 41 to drive the first pushing member 41 to move upwards, the second transmission member moves upwards along the limiting groove 13 under the transmission of the elastic member 43, when the second pushing member 42 moves to the closed end of the limiting groove 13, and is abutted against the upper end and the limiting part of the second pushing member 42, the second pushing member 42 does not move any more, at this time, the pushing arm 422 triggers the micro switch 3 to complete the state switching, and as the actuating mechanism continues to drive the first pushing member 41, the elastic member 43 deforms under the extrusion of the first pushing member 41 and the second pushing member 42, thereby compensating for the difference in stroke between the first and second pusher members 41, 42, i.e. the difference between the actuating mechanism and the auxiliary contacts, preferably the compression of the resilient member 43 is equal to the difference in stroke between the first and second pusher members 41, 42; when the actuating mechanism no longer applies force to the first pushing member 41, the elastic member 43 resets to push the first pushing member 41, and at the same time, the trigger point of the microswitch 3 acts on the push arm 422, so that the transmission mechanism 4 is restored. The structure has the advantages that two groups of normally open and normally closed contacts are connected in parallel through the circuit board, the conduction of the wiring terminal is not influenced when any contact in the same state is abnormal, and the conduction rate is higher.

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. An auxiliary contact module comprising a base (1) and an auxiliary contact assembly fitted within the base (1), characterized in that: the auxiliary contact assembly comprises a circuit board (2), an auxiliary contact connected to the circuit board (2) and a transmission mechanism (4) used for driving the switching state of the auxiliary contact, wherein the transmission mechanism (4) comprises a first pushing piece (41), a second pushing piece (42) and an elastic piece (43) arranged between the first pushing piece (41) and the second pushing piece (42), the first pushing piece (41) drives the second pushing piece (42) to slide along the base (1) under the driving of the action mechanism, after the switching state is triggered by the second pushing piece (42), the second pushing piece (42) is limited by the base (1), the first pushing piece (41) continues to slide, and the elastic piece (43) is elastically deformed to compensate for the stroke difference between the first pushing piece (41) and the second pushing piece (42).

2. The auxiliary contact module of claim 1, wherein: the auxiliary contact comprises at least one microswitch (3), and the second pushing piece (42) switches the normally open state or the normally closed state by triggering the microswitch (3).

3. An auxiliary contact module as claimed in claim 1 or 2, characterized in that: the auxiliary contact assembly further comprises a wiring terminal (5), and the wiring terminal (5) and the auxiliary contact are connected with the circuit board (2) respectively to form a whole.

4. The auxiliary contact module of claim 1, wherein: one end of the second pushing member (42) is provided with an accommodating cavity (421), and one end of the first pushing member (41) extends into the accommodating cavity (421) in a sliding mode and is compressed by an elastic member (43) arranged in the accommodating cavity (421) to make up stroke difference between the first pushing member (41) and the second pushing member (42).

5. The auxiliary contact module of claim 4, wherein: the second pushing piece (42) is of a hollow rod body structure with one closed end and one open end, the hollow part of the second pushing piece (42) is used as an accommodating cavity (421) for assembling the elastic piece (43), and a pushing arm (422) matched with the auxiliary contact is formed in a protruding mode on one side wall or two opposite sides of the second pushing piece (42).

6. The auxiliary contact module of claim 4, wherein: the first pushing piece (41) is integrally of a rod body structure, a matching portion (411) is formed by protruding of one end portion of the first pushing piece (41), and the matching portion (411) is matched with the side wall of the accommodating cavity (421) to limit the elastic piece (43).

7. An auxiliary contact module as claimed in claim 1, wherein: a limiting groove (13) is formed in the middle of the base (1), the second pushing piece (42) is in sliding fit with the limiting groove (13), and after the second pushing piece (42) triggers the auxiliary contact switching state, the limiting groove (13) limits the second pushing piece (42) to continuously slide.

8. An auxiliary contact module as claimed in claim 1 or 7, characterized in that: the wire connecting structure is characterized in that a plurality of parallel wiring grooves (11) are formed in one side of the base (1), a wiring terminal (5) is assembled in each wiring groove (11), a partition part (12) is arranged in the middle of the base (1) in a protruding mode, a limiting groove (13) is formed in the middle of the partition part (12), one end of the limiting groove (13) is sealed to serve as the limiting part, the second pushing part (42) abuts against the limiting part and then is limited in the limiting groove (13), the other end of the limiting groove (13) is opened to enable the first pushing part (41) to stretch into the limiting groove (13) to drive the second pushing part (42), and a through groove (131) is formed in one side wall or two side walls of the limiting groove (13).

9. The auxiliary contact module of claim 8, wherein: circuit board (2) set up between spacing groove (13) and wiring groove (11), set up an auxiliary contact at least in one side of circuit board (2) back to binding post (5), and the auxiliary contact is located one side of spacing groove (13) at least, binding post (5) adopt integrated type binding post (5).

10. The utility model provides a circuit breaker, includes the shell and sets up the actuating mechanism in the shell which characterized in that: further comprising an auxiliary contact module according to any of claims 1-9, the base (1) being fitted to the housing for releasable connection, the transmission mechanism (4) being driven by the actuating mechanism.

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