CN212934507U

CN212934507U - Improved structure of auxiliary switch of circuit breaker

Info

Publication number: CN212934507U
Application number: CN202021263709.8U
Authority: CN
Inventors: 周旭东; 张健; 丁怡博
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-09
Anticipated expiration: 2030-07-01

Abstract

The utility model provides a circuit breaker auxiliary switch improvement structure which characterized in that: an insulating plate (9) is fixedly arranged on the support (1), a micro switch group (7) is fixedly arranged on the insulating plate (9), an arc linkage surface (301) is arranged at the linkage end of the primary connecting rod (3) and the secondary transmission lever (5), a circular surface (501) corresponding to the arc linkage surface (301) is arranged on the secondary transmission lever (5), and the arc linkage surface (301) and the circular surface (501) are tangent to realize linkage; and an anti-bounce step (502) is arranged at one end of the secondary transmission lever (5) corresponding to the micro switch group (7). This circuit breaker auxiliary switch improvement structure adopts the circular arc linkage further to promote the stability of motion transmission, and micro-gap switch installs and has kept apart discharge arc on the insulation board, utilizes shellproof strengthening rib to avoid the second grade transmission lever to kick-back, has improved the reliability of motion transmission.

Description

Improved structure of auxiliary switch of circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker, specifically say so and relate to a circuit breaker auxiliary switch improvement structure.

Background

In traditional auxiliary contact switching process, it is contacted with the driving piece on the switch operating device to pass through hard lever one end more, the micro-gap switch contact on the other end and the auxiliary contact, thereby detect the deciliter state of switch, generally, in the twinkling of an eye that the switch separating brake put in place, micro-gap switch on the auxiliary contact changes into normally closed contact from normally open contact, but traditional switch all has the condition of moving contact bounce-back when the separating brake, lead to micro-gap switch to change into normally closed contact from normally open contact, change into normally open contact from normally closed contact again, the circulation is switched, stop until the bounce-back, like this, the deciliter state signal through auxiliary contact collection switch just appears frequently switching, the signal of feeding back for the customer is extremely inaccurate, can cause electrical apparatus malfunction and great loss on the circuit.

The reason for this is that during the opening process of the switch, the rotating arm driving piece of the operating mechanism drives the hard lever of the auxiliary contact, and the hard lever drives the micro switch on the contact of the contact to switch between the normally open state and the normally closed state. Because operating device drives the moving contact when breaking brake together, the moving contact motion has certain initial velocity and quality, when breaking brake targetting in place and touch spacing axle, the moving contact receives reaction force pulling operating device spiral arm, toward one section distance of combined floodgate direction motion again, when breaking brake targetting in place just touch spacing axle, the contact is the normally closed contact by normally open contact switching, nevertheless touch behind the spacing axle when toward one section distance of combined floodgate direction motion, the contact is normally open contact by normally closed contact switching, lead to the contact to switch unreliably.

Chinese patent ZL201810276819.9 discloses an anti-bounce auxiliary contact of a circuit breaker, which comprises an auxiliary contact support, wherein a microswitch group is fixedly arranged in the auxiliary contact support; the lever is arranged in the auxiliary contact support and can rotate, one end of the lever is linked with the microswitch group, and the other end of the lever is linked with the cam lever; the cam lever is installed can rotate in the auxiliary contact support, the one end of cam lever with the lever linkage, the other end and the linkage of mechanism spiral arm, reset spring one end dress is in on the auxiliary contact support, the other end dress is in on the cam lever. This circuit breaker prevents spring auxiliary contact through addding multistage lever drive mechanism, lets the mechanism spiral arm rebound in-process can not touch auxiliary micro-gap switch to it is inaccurate to have avoided moving contact rebound to drive the switching signal that mechanism spiral arm reciprocating motion leads to. However, the reliability of the transmission is insufficient due to the instability of the contact part of the moving part during the motion transmission process in the patent technology.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker auxiliary switch improvement structure to the unstable technical defect of the supplementary contact motion transmission of above-mentioned current circuit breaker anti-bounce, auxiliary switch motion transmission structure improves, has improved the stability of motion transmission.

Technical scheme

In order to realize the technical purpose, the utility model provides a circuit breaker auxiliary switch improves structure, it includes the support, and a axle is fixed to be adorned on the support, the rotatable dress of one-level connecting rod is in epaxial, two fixed dresses of axle are in on the support, the rotatable dress of second grade transmission lever is in epaxial two, one-level connecting rod one end and the linkage of mechanism spiral arm, the other end with the one end linkage of second grade transmission lever, the other end and the micro-gap switch group linkage of second grade transmission lever, reset spring one end dress are in on the support, the other end dress is in on the one-level connecting rod, its characterized in that:

the insulating plate is fixedly arranged on the support, the micro switch group is fixedly arranged on the insulating plate, an arc linkage surface is arranged at the linkage end of the primary connecting rod and the secondary transmission lever, a circular surface corresponding to the arc linkage surface is arranged on the secondary transmission lever, and the arc linkage surface and the circular surface are tangent to realize linkage;

and one end of the secondary transmission lever corresponding to the micro switch group is provided with a bounce-proof step, and one end of the secondary transmission lever corresponding to the primary connecting rod is provided with a bounce-proof arc.

Further, the arc linkage surface is provided with an arc rib capable of being in tangent linkage with the circular surface.

Furthermore, the counterclockwise opening rotation of the mechanism rotating arm can drive the primary connecting rod to rotate clockwise, the primary connecting rod firstly drives the secondary transmission lever to rotate counterclockwise in the clockwise rotation process, the secondary transmission lever rotates counterclockwise to drive the micro switch group to be closed, and the primary connecting rod does not drive the secondary transmission lever in the continuous clockwise rotation process;

when the spiral arm of the mechanism rebounds clockwise, the return spring drives the first-stage connecting rod to reset and rotate anticlockwise, and the second-stage transmission lever cannot be actuated in the anticlockwise resetting and rotating process of the first-stage connecting rod.

Furthermore, the micro switch group comprises a plurality of micro switches, the micro switches are fixedly arranged on a third shaft and a fourth shaft side by side, two ends of the third shaft and the fourth shaft are fixedly arranged on the support, and a clamp spring I is arranged at the end of the third shaft and the end of the fourth shaft for limiting.

Furthermore, the primary connecting rod is rotatably arranged on the first shaft and limited by the clamp springs, one side of the primary connecting rod extends out of the long arm and is actuated by the rotating arm of the mechanism, the other side of the primary connecting rod extends out of the circular arc linkage surface and actuates the secondary transmission lever, and the primary connecting rod is further provided with a spring hole.

Furthermore, one end of the return spring is arranged in a spring hanging hole on the bracket, and the other end of the return spring is arranged in a spring hole on the primary connecting rod.

Furthermore, one end of the secondary transmission lever extends out of a lever arm and is linked with a contact pin of the micro switch.

Preferably, the first shaft and the second shaft are steel bar shafts.

Advantageous effects

The utility model provides a pair of circuit breaker auxiliary switch improvement structure adopts the circular arc linkage further to promote the stability of motion transmission, and micro-gap switch has installed and has kept apart discharge arc on the insulation board, utilizes shellproof strengthening rib to avoid the second grade transmission lever to kick-back, has improved the reliability of motion transmission.

Drawings

Fig. 1 is a schematic diagram of the embodiment of the present invention installed on a circuit breaker.

Fig. 2 is an exploded schematic view of the embodiment of the present invention installed on a circuit breaker.

Fig. 3 is a schematic structural diagram of a one-level connecting rod in an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a secondary transmission lever according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the auxiliary switch before switching in the embodiment of the present invention.

Fig. 6 is a schematic diagram of the state after the auxiliary switch is switched in the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in fig. 1,2,5 and 6, an improved structure of an auxiliary switch of a circuit breaker comprises a bracket 1, a first shaft 2 is fixedly mounted on the bracket 1, and a first-stage connecting rod 3 is rotatably mounted on the first shaft 2, in this embodiment, the first-stage connecting rod 3 is rotatably mounted on the first shaft 2 and is limited by a second snap spring 11, and a spring hole 303 is further formed in the first-stage connecting rod 3. One end of the return spring 8 is arranged in the spring hanging hole 101 on the bracket 1, and the other end is arranged in the spring hole 303 on the primary connecting rod 3.

A second shaft 4 is fixedly arranged on the bracket 1, a second-stage transmission lever 5 is rotatably arranged on the second shaft 4, one end of the first-stage connecting rod 3 is linked with a mechanism rotating arm 6, and the other end of the first-stage connecting rod is linked with one end of the second-stage transmission lever 5, specifically, in the embodiment, as shown in fig. 3 and 4, one side of the first-stage connecting rod 3 extends out of a long arm 302 and is actuated by the mechanism rotating arm 6, and the other side actuates the second-stage transmission lever 5. The other end of the secondary transmission lever 5 is linked with the micro switch group 7, as shown in fig. 4 and 5, one end of the secondary transmission lever 5 extends out of the lever arm 502 and is linked with the contact pin 701a of the micro switch 701.

The insulating plate 9 is fixedly installed on the support 1, the micro switch group 7 is fixedly installed on the insulating plate 9, in this embodiment, the micro switch group 7 includes a plurality of micro switches 701, the micro switches 701 are fixedly installed on a third shaft 702 and a fourth shaft 703 side by side, two ends of the third shaft 702 and the fourth shaft 703 are fixedly installed on the support 1, and the ends of the third shaft 702 and the fourth shaft 703 are provided with a first snap spring 10 for limiting.

As shown in fig. 3 and 4, specifically, the arc-shaped coupling surface 301 is disposed at the coupling end of the primary connecting rod 3 and the secondary transmission lever 5, and in order to further enhance the anti-bouncing function of the primary connecting rod 3 and the secondary transmission lever 5, the arc-shaped coupling surface 301 is provided with an arc rib 301a capable of tangentially coupling with the circular surface 501. As shown in fig. 3 and 4, a circular surface 501 corresponding to the circular arc linkage surface 301 is arranged on the secondary transmission lever 5, and the circular arc linkage surface 301 and the circular surface 501 are tangent to realize linkage; the end of the secondary transmission lever 5 corresponding to the micro switch group 7 is provided with an anti-bounce step 502 to avoid the bounce of the micro switch push rod, and the end of the secondary transmission lever 5 corresponding to the primary connecting rod 3 is provided with an anti-bounce arc 502' to enhance the smoothness of the transmission of the secondary transmission lever 5 and the primary connecting rod 3.

As shown in fig. 5 and 6, in the present embodiment, the first shaft 2 and the second shaft 4 are steel rod shafts, which can prevent bouncing deformation. The mechanism rotating arm 6 rotates in a counterclockwise opening mode to drive the primary connecting rod 3 to rotate clockwise, the primary connecting rod 3 firstly drives the secondary transmission lever 5 to rotate counterclockwise in the clockwise rotating process, the secondary transmission lever 5 rotates counterclockwise to drive the micro switch group 7 to be closed, and then the primary connecting rod 3 does not drive the secondary transmission lever 5 in the continuous clockwise rotating process; after the circuit breaker is opened, the mechanism rotating arm 6 swings back and forth due to rebounding, the reset spring 8 drives the first-stage connecting rod 3 to reset and rotate anticlockwise, and the second-stage transmission lever 5 cannot be actuated in the process of resetting and rotating the first-stage connecting rod 3 anticlockwise. In the embodiment, the relative position of the primary connecting rod 3 and the secondary transmission lever 5 and the appearance of the linkage end of the primary connecting rod 3 and the secondary transmission lever 5 are calculated through design, so that the problem of inaccurate signals of the micro switch caused by rebounding can be effectively avoided, and the accurate output of the opening and closing states of the circuit breaker by the auxiliary switch is ensured.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a circuit breaker auxiliary switch improvement structure, it includes support (1), and axle one (2) fixed dress is in on support (1), the rotatable dress of one-level connecting rod (3) is in on axle one (2), axle two (4) fixed dress is in on support (1), the rotatable dress of second grade transmission lever (5) is in on axle two (4), one-level connecting rod (3) one end and mechanism spiral arm (6) linkage, the other end with the one end linkage of second grade transmission lever (5), the other end and the micro-gap switch group (7) linkage of second grade transmission lever (5), reset spring (8) one end dress is in on support (1), the other end dress is in on one-level connecting rod (3), its characterized in that:

an insulating plate (9) is fixedly arranged on the support (1), a micro switch group (7) is fixedly arranged on the insulating plate (9), an arc linkage surface (301) is arranged at the linkage end of the primary connecting rod (3) and the secondary transmission lever (5), a circular surface (501) corresponding to the arc linkage surface (301) is arranged on the secondary transmission lever (5), and the arc linkage surface (301) and the circular surface (501) are tangent to realize linkage;

and one end of the secondary transmission lever (5) corresponding to the micro switch group (7) is provided with an anti-bounce step (502), and one end of the secondary transmission lever (5) corresponding to the primary connecting rod (3) is provided with an anti-bounce arc (502').

2. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: the arc linkage surface (301) is provided with an arc rib (301a) which can be in tangent linkage with the circular surface (501).

3. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: the mechanism rotating arm (6) can drive the primary connecting rod (3) to rotate clockwise by opening and closing anticlockwise, the secondary transmission lever (5) is driven to rotate anticlockwise firstly in the clockwise rotation process of the primary connecting rod (3), the micro switch group (7) is driven to close by the anticlockwise rotation of the secondary transmission lever (5), and the secondary transmission lever (5) cannot be driven in the continuous clockwise rotation process of the primary connecting rod (3);

when the mechanism swing arm (6) rebounds clockwise, the reset spring (8) drives the first-stage connecting rod (3) to reset anticlockwise and rotate, and the second-stage transmission lever (5) is not actuated in the anticlockwise resetting and rotating process of the first-stage connecting rod (3).

4. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: the micro switch group (7) comprises a plurality of micro switches (701), the micro switches (701) are fixedly arranged on a third shaft (702) and a fourth shaft (703) side by side, two ends of the third shaft (702) and the fourth shaft (703) are fixedly arranged on the support (1), and the ends of the third shaft (702) and the fourth shaft (703) are provided with a first snap spring (10) for limiting.

5. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: the rotatable dress of one-level connecting rod (3) utilizes jump ring two (11) spacing on axle (2), one-level connecting rod (3) one side is stretched out long arm (302) and is by mechanism spiral arm (6) actuation, and the opposite side stretches out circular arc linkage face (301) actuation secondary drive lever (5), still be equipped with spring hole (303) on one-level connecting rod (3).

6. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: one end of the reset spring (8) is arranged in the spring hanging hole (101) on the bracket (1), and the other end of the reset spring is arranged in the spring hole (303) on the primary connecting rod (3).

7. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: one end of the secondary transmission lever (5) extends out of a lever arm (503) and is linked with a contact pin (701a) of the microswitch (701).

8. The improved structure of the auxiliary switch of the circuit breaker as claimed in claim 1, wherein: the first shaft (2) and the second shaft (4) are steel bar shafts.