CN108493064B - Anti-bounce auxiliary contact of circuit breaker - Google Patents
Anti-bounce auxiliary contact of circuit breaker Download PDFInfo
- Publication number
- CN108493064B CN108493064B CN201810276819.9A CN201810276819A CN108493064B CN 108493064 B CN108493064 B CN 108493064B CN 201810276819 A CN201810276819 A CN 201810276819A CN 108493064 B CN108493064 B CN 108493064B
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- lever
- auxiliary contact
- cam lever
- linked
- contact support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The auxiliary contact is characterized by comprising an auxiliary contact bracket, wherein a micro switch group is fixedly arranged in the auxiliary contact bracket; the lever is arranged in the auxiliary contact support and can rotate, one end of the lever is linked with the micro switch group, and the other end of the lever is linked with the cam lever; the cam lever is installed in the auxiliary contact support and can rotate, one end of the cam lever is linked with the lever, the other end of the cam lever is linked with the rotating arm of the mechanism, one end of the reset spring is installed on the auxiliary contact support, and the other end of the reset spring is installed on the cam lever. According to the circuit breaker anti-bounce auxiliary contact, the multistage lever transmission mechanism is additionally arranged, so that the auxiliary micro switch cannot be touched in the rebound process of the mechanism rotating arm, and the technical defect of inaccurate switching signals caused by the fact that the moving contact rebounds to drive the mechanism rotating arm to reciprocate is avoided.
Description
Technical Field
The invention belongs to the technical field of low-voltage switches, and particularly relates to a jump-prevention auxiliary contact of a circuit breaker.
Background
With the great application of the PLC intelligent control technology in a power system (particularly a wind power system), higher response requirements are provided for the signal feedback of the auxiliary contact of the circuit breaker, so that the system can accurately and timely control the system, and the power supply quality is ensured, and therefore, the on/off signal response of the auxiliary contact of the circuit breaker becomes particularly important.
In the traditional auxiliary contact switching process, one end of a hard lever is contacted with a driving piece on a switch operating mechanism, the other end of the hard lever is contacted with a micro switch on an auxiliary contact, so that the switching-on and switching-off state of the switch is detected, generally, at the moment that the switch is switched on and off in place, the micro switch on the auxiliary contact is converted into a normally-closed contact from a normally-open contact, but the traditional switch has the condition that a moving contact bounces when the switch is switched on, so that the micro switch is converted into the normally-closed contact from the normally-closed contact and then converted into the normally-open contact, and the micro switch is circularly switched until rebound is stopped, and in this way, frequent switching occurs through the auxiliary contact to collect switching-on and switching-off state signals of the switch, the signals fed back to a customer are extremely inaccurate, and misoperation and large loss of an electric appliance on a circuit can be caused.
The reason for the phenomenon is that the operating mechanism rotates the arm driving piece to drive the auxiliary contact hard lever in the switching-off process of the switch, and the hard lever drives the micro switch on the contact to enable the micro switch to be switched between normally open and normally closed. When the moving contact is driven by the operating mechanism to break the brake together, the moving contact moves at a certain initial speed and with a certain mass, when the break brake is in place and touches the limiting shaft, the moving contact is pulled by the reaction force to rotate the operating mechanism and moves a certain distance towards the closing direction, when the break brake is in place and just touches the limiting shaft, the contact is switched from the normally open contact to the normally closed contact, but when the break brake is touched and then moves a certain distance towards the closing direction, the contact is switched from the normally closed contact to the normally open contact, and the contact is unreliable in switching.
The Chinese patent ZL200810244463.7 discloses an auxiliary switch of a breaker, belonging to the technical field of accessories of a low-voltage electrical apparatus. The circuit breaker comprises a pair of shells matched with each other, a micro switch arranged in a shell cavity of the shells and a transmission piece arranged in the shell cavity of the shells in the same way, wherein a first contact arm for actuating a contact pin of the micro switch and a second contact arm which extends out of the shells and is used for actuating a circuit breaker operating mechanism are formed on the transmission piece; the operation reliability and the safety of the micro switch can be improved, and finally the reliability of the auxiliary switch is ensured. However, the auxiliary contact only considers the protection of the micro switch when the operating mechanism of the circuit breaker generates the overshoot phenomenon, and the technical problem that the micro switch is converted from a normally open contact to a normally closed contact and then from the normally closed contact to the normally open contact for cyclic switching, so that the signal is inaccurate due to the existence of the rebound phenomenon of the moving contact is not solved.
Disclosure of Invention
The invention aims at solving the technical problem that the signals are inaccurate due to the fact that the micro switch is converted from a normally-open contact to a normally-closed contact and then from the normally-closed contact to the normally-open contact to be circularly switched due to the rebound phenomenon of the movable contact. The auxiliary contact for preventing the circuit breaker from jumping is provided, and the inaccuracy of a switching signal caused by the fact that a moving contact rebounds to drive a rotating arm of a mechanism to reciprocate is avoided by additionally arranging a multi-stage lever transmission mechanism.
Technical proposal
In order to achieve the technical aim, the invention designs a circuit breaker anti-bounce auxiliary contact, which is characterized by comprising an auxiliary contact bracket, wherein a micro switch group is fixedly arranged in the auxiliary contact bracket; the lever is arranged in the auxiliary contact support and can rotate, one end of the lever is linked with the micro switch group, and the other end of the lever is linked with the cam lever; the cam lever is installed in the auxiliary contact support and can rotate, one end of the cam lever is linked with the lever, the other end of the cam lever is linked with the rotating arm of the mechanism, one end of the reset spring is installed on the auxiliary contact support, and the other end of the reset spring is installed on the cam lever.
Further, the clockwise rotation of the rotating arm of the mechanism can drive the cam lever to rotate anticlockwise, the cam lever can firstly drive the lever to rotate in the anticlockwise rotation process, the lever rotates to drive the micro switch group to be closed, and the cam lever is not actuated in the anticlockwise rotation process;
when the rotating arm of the mechanism rebounds anticlockwise, the return spring drives the cam lever to rotate clockwise, and the cam lever is not actuated in the clockwise rotation process.
Further, one end of the lever, which is in linkage with the cam lever, is in an arc concave-convex wavy shape, and one end of the cam lever, which is in linkage with the lever, is in a partial arc shape.
Further, the micro switch group comprises a plurality of micro switches, the micro switches are fixedly arranged on a first shaft and a second shaft side by side, two ends of the first shaft and the second shaft are fixedly arranged on the auxiliary contact support, and check rings are arranged at two ends of the first shaft and the second shaft.
Further, the cam lever comprises a rotating body, two ends of the rotating body are arranged in the first mounting hole of the auxiliary contact support, one end of the cam lever extends out of the long arm to be actuated by the rotating arm of the mechanism, the other end extends out of the short arm to actuate the lever, and a spring hole is further formed in the cam lever.
Further, one end of the return spring is arranged in a spring hanging hole on the auxiliary contact support, and the other end of the return spring is arranged in a spring hole on the cam lever.
Further, the lever comprises a rotating shaft, two ends of the rotating shaft are arranged in a second mounting hole of the auxiliary contact support, one end of the lever extends out of the lever arm to be linked with a contact pin of the micro switch, and the other end of the lever is linked with the cam lever.
Further, the auxiliary contact holder is mounted on the breaker body.
Advantageous effects
The invention provides a circuit breaker anti-bounce auxiliary contact, which is characterized in that a multistage lever transmission mechanism is additionally arranged, so that an auxiliary micro switch cannot be touched in the rebound process of a mechanism radial arm, and the technical defect of inaccurate switching signals caused by the reciprocating motion of the mechanism radial arm driven by the rebound of a moving contact is avoided.
Drawings
FIG. 1 is an exploded schematic view of an embodiment of the present invention.
FIG. 2 is an application installation schematic of an embodiment of the present invention.
Fig. 3 is a schematic structural view of an embodiment of the present invention.
Fig. 4 is a schematic illustration of lever and cam lever relationships in an embodiment of the invention.
Fig. 5 is a schematic diagram of an auxiliary contact before switching in an embodiment of the present invention.
Fig. 6 is a schematic diagram of an intermediate state after auxiliary contacts are switched in an embodiment of the present invention.
Fig. 7 is a schematic diagram of the final state of the auxiliary contact after switching in the embodiment of the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and examples.
Examples
As shown in fig. 1,2 and 3, a circuit breaker jump-prevention auxiliary contact comprises an auxiliary contact bracket 1, wherein the auxiliary contact bracket 1 is arranged on a circuit breaker body 8. The micro switch group 2 is fixedly arranged in the auxiliary contact support 1, the lever 3 is arranged in the auxiliary contact support 1 and can rotate, one end of the lever 3 is linked with the micro switch group 2, and the other end is linked with the cam lever 4; the cam lever 4 is arranged in the auxiliary contact support 1 and can rotate, one end of the cam lever 4 is linked with the lever 4, and the other end is linked with the mechanism radial arm 5; one end of a return spring 6 is arranged on the auxiliary contact support 1, and the other end is arranged on the cam lever 4.
As shown in fig. 4, an end of the lever 3, which is coupled with the cam lever 4, is in a shape of a circular arc, concave-convex wave, and an end of the cam lever 4, which is coupled with the lever 3, is in a shape of a partial circular arc. In this embodiment, as shown in fig. 1, the micro switch group 2 includes a plurality of micro switches 201, the micro switches 201 are fixedly mounted on a first shaft 202 and a second shaft 203 side by side, two ends of the first shaft 202 and the second shaft 203 are fixedly mounted on the auxiliary contact support 1, and two ends of the first shaft 202 and the second shaft 203 are provided with check rings 7.
The cam lever 4 comprises a rotating body 401, two ends of the rotating body 401 are arranged in a first mounting hole 101 of the auxiliary contact support 1, one end of the cam lever 4 extends out of a long arm 402 to be actuated by the mechanism rotating arm 5, the other end extends out of a short arm 403 to actuate the lever 3, and a spring hole 404 is further formed in the cam lever 4. As shown in fig. 3 and 4, one end of the return spring 6 is mounted in the spring mounting hole 102 of the auxiliary contact bracket 1, and the other end is mounted in the spring hole 404 of the cam lever 4. As shown in fig. 1, 3 and 4, the lever 3 includes a rotation shaft 301, two ends of the rotation shaft 301 are mounted in the second mounting hole 103 of the auxiliary contact support 1, one end of the lever 3 extends out of the lever arm 302 to be linked with the contact leg 201a of the micro switch 201, and the other end is linked with the cam lever 4.
As shown in fig. 3, when the radial arm 5 of the switch-on mechanism of the circuit breaker rotates anticlockwise, the cam lever 4 rotates clockwise around the rotator 401 under the action of the tension of the return spring 6, the linkage end of the lever 3 is pushed by the directional thrust of the micro switch contact pin 201a, and finally the linkage end of the lever 3 is separated from the micro switch contact pin 201a, so that the state of the micro switch group 2 is successfully switched. The cam lever 4 does not actuate the lever 3 during clockwise rotation due to the counter-clockwise rebound of the radial arm 5 of the circuit breaker opening mechanism.
As shown in fig. 5, 6 and 7, when the breaker opening mechanism radial arm 5 rotates clockwise, the mechanism radial arm 5 rotates clockwise to drive the cam lever 4 to rotate anticlockwise around the rotator 401, the cam lever 4 can firstly drive the lever 3 to rotate in the anticlockwise rotation process, and the lever 3 rotates to drive the micro switch group 2 to be closed so as to realize the state switching of the micro switch group 2. The cam lever 4 then continues to rotate anticlockwise, during which the lever 3 is not actuated. After the breaker is opened, the mechanism radial arm 5 swings back and forth due to rebound, and the embodiment can effectively avoid the problem of inaccurate micro-switch signals caused by rebound by designing and calculating the relative positions of the cam lever 4 and the lever 3 and the appearance of the linkage ends of the cam lever 4 and the lever 3, thereby ensuring that the auxiliary switch accurately outputs the opening and closing states of the breaker.
The structures, proportions, sizes, etc. shown in the drawings of the embodiments of the present invention are shown only in the drawings and should not be construed as limiting the invention to the embodiments, so that any structural modifications, proportional changes or size adjustment may fall within the scope of the invention without affecting the efficacy and achievement of the invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "anticlockwise" and the like are used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, and the relative relation changes or modifications thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Claims (6)
1. A circuit breaker jump-prevention auxiliary contact, characterized in that it comprises:
an auxiliary contact support (1);
The micro switch group (2) is fixedly arranged in the auxiliary contact support (1);
the lever (3) is arranged in the auxiliary contact support (1) and can rotate, one end of the lever (3) is linked with the micro switch group (2), and the other end of the lever is linked with the cam lever (4);
the cam lever (4) is arranged in the auxiliary contact support (1) and can rotate, one end of the cam lever (4) is linked with the lever (3), and the other end of the cam lever is linked with the mechanism rotating arm (5);
A return spring (6), wherein one end of the return spring (6) is arranged on the auxiliary contact support (1), and the other end of the return spring is arranged on the cam lever (4);
the rotating arm (5) of the mechanism can drive the cam lever (4) to rotate anticlockwise, the cam lever (4) can drive the lever (3) to rotate in the anticlockwise rotation process, the lever (3) rotates to drive the microswitch group (2) to be closed, and the cam lever (4) does not actuate the lever (3) in the anticlockwise rotation process;
When the rotating arm (5) of the mechanism rebounds anticlockwise, the return spring (6) drives the cam lever (4) to rotate clockwise, and the cam lever (4) does not actuate the lever (3) in the clockwise rotation process;
The end of the lever (3) linked with the cam lever (4) is in an arc concave-convex wavy shape, and the end of the cam lever (4) linked with the lever (3) is in a partial arc shape.
2. The circuit breaker anti-bounce auxiliary contact of claim 1, wherein: the micro switch group (2) comprises a plurality of micro switches (201), the micro switches (201) are fixedly arranged on a first shaft (202) and a second shaft (203) side by side, two ends of the first shaft (202) and the second shaft (203) are fixedly arranged on the auxiliary contact support (1), and check rings (7) are arranged at two ends of the first shaft (202) and the second shaft (203).
3. The circuit breaker anti-bounce auxiliary contact of claim 1, wherein: the cam lever (4) comprises a rotating body (401), two ends of the rotating body (401) are arranged in a first mounting hole (101) of the auxiliary contact support (1), one end of the cam lever (4) extends out of a long arm (402) to be actuated by the rotating arm (5) of the mechanism, the other end of the cam lever extends out of a short arm (403) to actuate the lever (3), and a spring hole (404) is further formed in the cam lever (4).
4. The circuit breaker anti-bounce auxiliary contact of claim 1, wherein: one end of the return spring (6) is arranged in a spring hanging hole (102) on the auxiliary contact support (1), and the other end of the return spring is arranged in a spring hole (404) on the cam lever (4).
5. The circuit breaker anti-bounce auxiliary contact of claim 1, wherein: the lever (3) comprises a rotating shaft (301), two ends of the rotating shaft (301) are arranged in a second mounting hole (103) of the auxiliary contact support (1), one end of the lever (3) extends out of a lever arm (302) to be linked with a contact pin (201 a) of the microswitch (201), and the other end of the lever is linked with the cam lever (4).
6. The circuit breaker anti-bounce auxiliary contact of claim 1, wherein: the auxiliary contact support (1) is arranged on the breaker body (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276819.9A CN108493064B (en) | 2018-03-30 | 2018-03-30 | Anti-bounce auxiliary contact of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276819.9A CN108493064B (en) | 2018-03-30 | 2018-03-30 | Anti-bounce auxiliary contact of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108493064A CN108493064A (en) | 2018-09-04 |
| CN108493064B true CN108493064B (en) | 2024-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810276819.9A Active CN108493064B (en) | 2018-03-30 | 2018-03-30 | Anti-bounce auxiliary contact of circuit breaker |
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| CN (1) | CN108493064B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192803B (en) * | 2021-04-25 | 2024-03-15 | 西屋开关设备(江苏)有限公司 | Auxiliary contact structure for universal circuit breaker and application method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208142113U (en) * | 2018-03-30 | 2018-11-23 | 上海良信电器股份有限公司 | A kind of breaker bounce-proof auxiliary contact |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476091Y (en) * | 2001-04-04 | 2002-02-06 | 魏学山 | Device for preventing vacuum circuit breaker switch-on bounce |
| KR100576307B1 (en) * | 2004-08-27 | 2006-05-03 | 엘에스산전 주식회사 | High pressure equipment opening and closing rebound prevention device |
| CN102054631B (en) * | 2011-01-19 | 2013-04-17 | 西安交通大学 | Anti-bouncer for circuit breaker |
| EP2835814B1 (en) * | 2013-08-07 | 2016-04-06 | ABB S.p.A. | Circuit breaker |
| CN104465254A (en) * | 2013-09-24 | 2015-03-25 | 上海电科电器科技有限公司 | Rotary double-breakpoint contact |
| CN206742179U (en) * | 2017-03-14 | 2017-12-12 | 江苏高博锐电气有限公司 | Moving contact of breaker resilience-proof device |
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2018
- 2018-03-30 CN CN201810276819.9A patent/CN108493064B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208142113U (en) * | 2018-03-30 | 2018-11-23 | 上海良信电器股份有限公司 | A kind of breaker bounce-proof auxiliary contact |
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| CN108493064A (en) | 2018-09-04 |
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