CN201796839U - Moving contact device of low-voltage molded case circuit breaker - Google Patents
Moving contact device of low-voltage molded case circuit breaker Download PDFInfo
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- CN201796839U CN201796839U CN201020299079XU CN201020299079U CN201796839U CN 201796839 U CN201796839 U CN 201796839U CN 201020299079X U CN201020299079X U CN 201020299079XU CN 201020299079 U CN201020299079 U CN 201020299079U CN 201796839 U CN201796839 U CN 201796839U
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Abstract
The utility model relates to a moving contact device of a low-voltage molded case circuit breaker, which is formed by combination and installation of a moving contact, a support, a fixed pin, a disk spring, a compression sleeve, a split washer, a pin shaft, a shaft sleeve, a tension spring and a rotating shaft; an anti-dropping device of the moving contact of the circuit breaker is realized by utilizing simplest parts; when circuit break occurs, electric repulsion generated by short-circuit current is utilized for uplifting the moving contact and keeping the moving contact in the position with open distance, thereby realizing current limitation and simultaneously improving the breaking capacity of the circuit breaker. In the moving contact device of the low-voltage molded case circuit breaker, the connection way between the moving contact and the wire outlet end adopts a copper support for clamping two sides of the moving contact, therefore, the utilization of flexible connection material and the welding process are eliminated, the requirements on reliable structure and low cost are met and the purposes of being simple in process, being convenient for mounting, and being economic and practical are achieved.
Description
Technical field
The utility model belongs to the equipment for power transmission and distribution industry, relates to a kind of low-pressure plastic shell circuit breaker trigger device in the switch cubicle components and parts.
Background technology
In the prior art, the major technology index has two kinds for the moving contact system of low-pressure plastic shell circuit breaker: provide contact terminate pressure and conduction reliable.But, when satisfying these two kinds of technical indicators, occurred utilizing this class technology of the dropproof device of moving contact to come new design theory to the circuit current limliting along with the progress of circuit breaker design technical merit.Present most circuit breaker does not all have dropproof device or comparatively complicated dropproof device is arranged, and the mode that the outlet of moving contact rear portion adopts welding to be flexible coupling connects, these two kinds of traditional modes be in the utilization of present moving contact of breaker technology the most widely, but all have their limitation and defective simultaneously.Many, the complex process of the part kind of some dropproof device, inconvenience installation at present, the stability of product is not high, can not reliably moving contact be fixed on out the position of distance, and production cost is also high; The method complex process that the moving contact outlet method adopts welding to be flexible coupling, be inconvenient to check, improved cost, and the wearing and tearing easily in the use of using circuit breaker that are flexible coupling of welding, causing the temperature rise of circuit breaker to exceed standard, is a bottleneck part in the present circuit breaker manufacturing process.For example application number is the patent of 200810071883.x, and its parts machining process complexity also needs control surface fineness after the processing and forming; And its pressing plate location also is difficult for reaching precision, under the active force of stage clip, easily produce double swerve and produce fault, and the integral installation inconvenience, stage clip is installed in rotating shaft inside needs to use special tooling to assemble; Pressing plate and spring contact position are not steady, and discontinuity easily causes contact pressure unbalanced, influences mechanism stable.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of novel low-pressure plastic shell circuit breaker trigger device is provided, utilize the simplest part to realize the dropproof device of moving contact of breaker, promptly when circuit opens circuit, the position that the electrodynamic repulsion force that utilizes short circuit current to produce lifts moving contact and remain on out distance, in current limliting, improve a kind of device of the breaking capacity of circuit breaker.
Low-pressure plastic shell circuit breaker trigger device of the present utility model, the connected mode of moving contact and leading-out terminal adopts copper stent and moving contact both sides to carry out clamping, cancelled the technology of the utilization and the welding of the material that is flexible coupling, and claimed structure is reliable, with low cost, can reach simple, easy for installation, the economical and practical purpose of technology.
The technical scheme that solves its technical problem employing is: design a kind of low-pressure plastic shell circuit breaker trigger device, by moving contact, support, steady pin, disk spring, clamping sleeve, split washer, bearing pin, axle sleeve, extension spring and rotating shaft aggregate erection form, its shaft is the tubbiness cylinder, there is circular axis hole at the center, there is scalloped recess cylinder middle part vertically, two pin clamping moving contact afterbodys plug-in mounting from scalloped recess of support is entered, steady pin pierces into from rotating shaft central shaft hole one end, pass the support pin, pass the rotating shaft central shaft hole other end behind the moving contact afterbody again, with rotating shaft, support, the moving contact assembling connects, steady pin two ends suit disk spring and clamping sleeve, make tightly clamping moving contact of support pin, the steady pin two ends utilize split washer to fix again; Support, steady pin are fixedlyed connected with low-pressure plastic shell circuit breaker mechanism, rotating shaft, moving contact, disk spring and clamping sleeve all can rotate around steady pin, support and disk spring are conductor material, by the pressure assurance moving contact of disk spring and the conductivity between the copper stent, and the stress curve of disk spring changes little, high temperature resistant, wear-resistant, can fully guarantee the mechanical endurance and the electrical endurance of moving contact to have improved mechanism stable greatly.
All there is long recess on described rotating shaft right part two sides, and groove one end is provided with manhole, and an end is provided with the long waist shaped through hole, in the through hole of groove two ends bearing pin is set all, all places extension spring in the groove of rotating shaft two sides, and the extension spring two ends are strained and fixed by bearing pin; Bearing pin in the long waist shaped through hole installs axle sleeve additional in the middle part, and bearing pin and axle sleeve are in moving contact inner end below in vertical direction, and the moving contact inner end compresses axle sleeve, and the moving contact inner end is provided with circular groove.
The periphery of described rotating shaft has a gravitating bed along support pin running orbit, prevents rotating shaft when steady pin rotates, and support pin base friction rotating shaft surface guarantees that mechanism action is smooth.
Described a whole set of trigger device is fixedly connected on the low-pressure plastic shell circuit breaker mechanism base by steady pin, and the end opening of scalloped recess can promote moving contact and rotates around steady pin when rotating shaft turned right; The rotating shaft lower left quarter has a through hole, and the through hole that other has connecting rod to pass every phase rotating shaft is together in series heterogeneous rotating shaft, to guarantee heterogeneous moving contact synchronization action.
Low-pressure plastic shell circuit breaker trigger device of the present utility model is when normal operation position, the moving contact front end is in extreme lower position, the moving contact inner end is in the extreme higher position, bearing pin and axle sleeve are in moving contact inner end below in vertical direction, extension spring provides pulling force on the trend for bearing pin and axle sleeve, make axle sleeve hold out against the moving contact inner end, the contact terminate pressure when relying on lever principle that switch on of moving contact is provided.
When short circuit current produces, the electrodynamic repulsion force that short circuit current produced lifts the moving contact front end, corresponding moving contact inner end moves downward, this moment, bearing pin and axle sleeve were under the effect of moving contact inner end pressure, to lower slider, and axle sleeve rolls along the moving contact inner end under the tension spring tension effect simultaneously along the long waist shaped through hole of rotating shaft right part groove; Along with the moving contact inner end moves downward, axle sleeve turns minor face from the long limit of moving contact inner end, and roll along minor face, when the moving contact front end rises to when driveing apart from the position, the moving contact inner end drops to extreme lower position, and axle sleeve falls in the circular groove of moving contact inner end minor face terminal point, and axle sleeve and bearing pin are in extreme lower position in the long waist shaped through hole of rotating shaft right part groove, extension spring is opened to maximum length, and pulling force arrives maximum greatly; This moment, the electrodynamic repulsion force of short circuit current acted on less than on the moving contact, and the moving contact inner end is blocked by axle sleeve, make moving contact not move again, after losing electrodynamic repulsion force, still can remain on and drive apart from the position, the effect that extension spring took place of bearing pin is held at two ends, by providing contact terminate pressure to convert the confining force that keeps contact to open to, the conversion of the ingenious power of utilization realizes the dropproof device of contact, prevent that moving contact from falling behind the arc of restriking in the action of gravity drop, play the effect of current limliting, thereby improve the breaking capacity of low-pressure plastic shell circuit breaker; This moment, a whole set of low-pressure plastic shell circuit breaker still was in "on" position, and moving contact has been in the disjunction position.
During low-pressure plastic shell circuit breaker handle separating brake, connecting rod drive rotating shaft around steady pin to right rotation, bearing pin and axle sleeve along with rotating shaft around steady pin to right rotation, moving contact is by low-pressure plastic shell circuit breaker mechanics limit stroke transfixion, axle sleeve rolls along moving contact inner end minor face when steady pin rotates, roll out the back until turning the inner minister of moving contact limit from circular groove, extension spring this moment homing, the pulling axle sleeve upwards slides into the extreme higher position along the long waist shaped through hole along rotating shaft right part groove, and axle sleeve holds out against the moving contact inner end again under the tension spring tension effect.
When operation low-pressure plastic shell circuit breaker handle closes a floodgate, connecting rod drive rotating shaft around steady pin to anticlockwise, bearing pin and axle sleeve along with rotating shaft around steady pin to anticlockwise, axle sleeve is under the tension spring tension effect, promoting the moving contact inner end upwards rotates, the moving contact front end rotates until combined floodgate, extension spring tension bearing pin and axle sleeve, the contact terminate pressure when relying on lever principle that switch on of moving contact is provided.
Description of drawings
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is a normal operation position cross section structure schematic diagram of the present utility model.
Fig. 3 is that moving contact of the present utility model is scolded the open position schematic cross-section.
Fig. 4 is a plan front view of the present utility model.
Fig. 5 is the utility model left side pseudosection.
Embodiment
As shown in the figure, low-pressure plastic shell circuit breaker trigger device of the present utility model, by moving contact 1, support 2, steady pin 3, disk spring 4, clamping sleeve 5, split washer 6, bearing pin 7, axle sleeve 8, extension spring 9 and rotating shaft 10 aggregate erections form, its shaft 10 is the tubbiness cylinder, there is circular axis hole at the center, there is scalloped recess cylinder middle part vertically, two pin clamping moving contact 1 afterbodys plug-in mounting from scalloped recess of support 2 is entered, steady pin 3 pierces into from rotating shaft 10 central shaft holes one end, pass support 2 pins, pass the rotating shaft 10 central shaft hole other ends behind moving contact 1 afterbody again, with rotating shaft 10, support 2, moving contact 1 assembling connects, steady pin 3 two ends suit disk springs 4 and disk spring 4 clamping sleeves 5 make tightly clamping moving contact 1 of support 2 pins, and steady pin 3 two ends utilize split washer 6 to fix again; Support 2, steady pin 3 are fixedlyed connected with low-pressure plastic shell circuit breaker mechanism, rotating shaft 10, moving contact 1, disk spring 4 and disk spring 4 clamping sleeves 5 all can be around steady pin 3 rotations, support 2 is conductor material with disk spring 4, by the pressure assurance moving contact 1 of disk spring 4 and the conductivity between the copper stent 2, and the stress curve of disk spring 4 changes little, high temperature resistant, wear-resistant, can fully guarantee the mechanical endurance and the electrical endurance of moving contact 1 to have improved mechanism stable greatly.
All there is long recess on described rotating shaft 10 right part two sides, and groove one end is provided with manhole, and an end is provided with the long waist shaped through hole, in the through hole of groove two ends bearing pin 7 is set all, all place extension spring 9 in the rotating shaft 10 two sides grooves, and extension spring 9 two ends are strained and fixed by bearing pin 7; Bearing pin 7 in the long waist shaped through hole installs axle sleeve 8 additional in the middle part, bearing pin 7 is in moving contact 1 inner end below in vertical direction with axle sleeve 8, and moving contact 1 inner end compresses axle sleeve 8, and moving contact 1 inner end is provided with circular groove.
The periphery of described rotating shaft 10 has a gravitating bed along support 2 pin running orbits, prevents rotating shaft 10 when steady pin 3 rotations, and support 2 pin bases friction rotating shaft 10 surfaces guarantee that mechanism action is smooth.
Described a whole set of moving contact 1 device is fixedly connected on the low-pressure plastic shell circuit breaker mechanism base by steady pin 3, and the end opening of scalloped recess can promote moving contact 1 around steady pin 3 rotations when rotating shaft 10 turned right; Rotating shaft 10 lower left quarters have a through hole, and the through hole that other has connecting rod to pass every phase rotating shaft 10 is together in series heterogeneous rotating shaft 10, to guarantee heterogeneous moving contact 1 synchronization action.
Low-pressure plastic shell circuit breaker moving contact 1 device of the present utility model is when normal operation position, moving contact 1 front end is in extreme lower position, moving contact 1 inner end is in the extreme higher position, bearing pin 7 is in moving contact 1 inner end below in vertical direction with axle sleeve 8, extension spring 9 provides pulling force on the trend for bearing pin 7 and axle sleeve 8, make axle sleeve 8 hold out against moving contact 1 inner end, the contact terminate pressure when relying on lever principle to provide moving contact 1 to close a floodgate.
When short circuit current produces, the electrodynamic repulsion force that short circuit current produced lifts moving contact 1 front end, corresponding moving contact 1 inner end moves downward, this moment, bearing pin 7 and axle sleeve 8 were under moving contact 1 inner end pressure effect, to lower slider, and axle sleeve 8 rolls along moving contact 1 inner end under extension spring 9 tension simultaneously along the long waist shaped through hole of rotating shaft 10 right part grooves; Along with moving contact 1 inner end moves downward, axle sleeve 8 turns minor face from moving contact 1 inner minister limit, and roll along minor face, when moving contact 1 front end rises to when driveing apart from the position, moving contact 1 inner end drops to extreme lower position, and axle sleeve 8 falls in the circular groove of moving contact 1 inner end minor face terminal point, and axle sleeve 8 is in extreme lower position with bearing pin 7 in the long waist shaped through hole of rotating shaft 10 right part grooves, extension spring 9 is opened to maximum length, and pulling force arrives maximum greatly; This moment, the electrodynamic repulsion force of short circuit current acted on less than on the moving contact 1, and moving contact 1 inner end is blocked by axle sleeve 8, make moving contact 1 not move again, after losing electrodynamic repulsion force, still can remain on and drive apart from the position, the effect that the extension spring 9 of two ends pulling bearing pin 7 is taken place, by providing contact terminate pressure to convert the confining force that keeps contact to open to, the conversion of the ingenious power of utilization realizes the dropproof device of contact, prevent that moving contact 1 from falling behind the arc of restriking in the action of gravity drop, play the effect of current limliting, thereby improve the breaking capacity of low-pressure plastic shell circuit breaker; This moment, a whole set of low-pressure plastic shell circuit breaker still was in "on" position, and moving contact 1 has been in the disjunction position.
During low-pressure plastic shell circuit breaker handle separating brake, connecting rod drive rotating shaft 10 around steady pin 3 to right rotation, bearing pin 7 with axle sleeve 8 along with rotating shaft 10 around steady pin 3 to right rotation, moving contact 1 is by low-pressure plastic shell circuit breaker mechanics limit stroke transfixion, axle sleeve 8 rolls along moving contact 1 inner end minor face in the time of steady pin 3 rotations, roll out the back until turning moving contact 1 inner minister limit from circular groove, extension spring this moment 9 homings, pulling axle sleeve 8 edges upwards slide into the extreme higher position along the long waist shaped through hole of rotating shaft 10 right part grooves, and axle sleeve 8 holds out against moving contact 1 inner end again under extension spring 9 tension.
When operation low-pressure plastic shell circuit breaker handle closes a floodgate, connecting rod drive rotating shaft 10 around steady pin 3 to anticlockwise, bearing pin 7 with axle sleeve 8 along with rotating shaft 10 around steady pin 3 to anticlockwise, axle sleeve 8 is under extension spring 9 tension, promoting moving contact 1 inner end upwards rotates, moving contact 1 front end rotates until combined floodgate, extension spring 9 tension bearing pins 7 and axle sleeve 8, the contact terminate pressure when relying on lever principle to provide moving contact 1 to close a floodgate.
Claims (4)
1. low-pressure plastic shell circuit breaker trigger device, by moving contact (1), support (2), steady pin (3), disk spring (4), clamping sleeve (5), split washer (6), bearing pin (7), axle sleeve (8), extension spring (9) and rotating shaft (10) aggregate erection form, it is characterized in that: rotating shaft (10) is the tubbiness cylinder, there is circular axis hole at the center, there is scalloped recess cylinder middle part vertically, two pin clamping moving contact (1) afterbodys plug-in mounting from scalloped recess of support (2) is entered, steady pin (3) pierces into from rotating shaft (10) central shaft hole one end, pass support (2) pin, pass rotating shaft (10) the central shaft hole other end behind moving contact (1) afterbody again, with rotating shaft (10), support (2), moving contact (1) assembling connects, steady pin (3) two ends suit disk springs (4) and disk spring (4) clamping sleeve (5), steady pin (3) two ends are provided with split washer (6); Support (2), steady pin (3) are fixedlyed connected with low-pressure plastic shell circuit breaker mechanism, rotating shaft (10), moving contact (1), disk spring (4) and disk spring (4) clamping sleeve (5) all can be around steady pin (3) rotations, and support (2) is conductor material with disk spring (4).
2. low-pressure plastic shell circuit breaker trigger device according to claim 1, it is characterized in that: all there is long recess on described rotating shaft (10) right part two sides, groove one end is provided with manhole, one end is provided with the long waist shaped through hole, bearing pin (7) all is set in manhole and the long waist shaped through hole, all place extension spring (9) in the groove of rotating shaft (10) two sides, extension spring (9) two ends are strained and fixed by bearing pin (7); Bearing pin (7) in the long waist shaped through hole installs axle sleeve (8) additional in the middle part, bearing pin (7) is in moving contact (1) inner end below in vertical direction with axle sleeve (8), moving contact (1) inner end compresses axle sleeve (8), and moving contact (1) inner end is provided with circular groove.
3. low-pressure plastic shell circuit breaker trigger device according to claim 2 is characterized in that: the periphery of described rotating shaft (10) has a gravitating bed along support (2) pin running orbit.
4. low-pressure plastic shell circuit breaker trigger device according to claim 2 is characterized in that: described low-pressure plastic shell circuit breaker trigger device is fixedly connected on the low-pressure plastic shell circuit breaker mechanism base by steady pin (3), and rotating shaft (10) lower left quarter has a through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020299079XU CN201796839U (en) | 2010-08-20 | 2010-08-20 | Moving contact device of low-voltage molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020299079XU CN201796839U (en) | 2010-08-20 | 2010-08-20 | Moving contact device of low-voltage molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201796839U true CN201796839U (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020299079XU Expired - Fee Related CN201796839U (en) | 2010-08-20 | 2010-08-20 | Moving contact device of low-voltage molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201796839U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420082A (en) * | 2011-08-09 | 2012-04-18 | 无锡新宏泰电器科技股份有限公司 | Fall-preventing device for movable contact of moulded case circuit breaker |
| CN104576247A (en) * | 2015-01-05 | 2015-04-29 | 无锡新宏泰电器科技股份有限公司 | Falling-prevention single-break contact operation mechanism |
| CN106653412A (en) * | 2016-12-30 | 2017-05-10 | 无锡新宏泰电器科技股份有限公司 | Moving contact clamping structure for circuit breaker |
-
2010
- 2010-08-20 CN CN201020299079XU patent/CN201796839U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420082A (en) * | 2011-08-09 | 2012-04-18 | 无锡新宏泰电器科技股份有限公司 | Fall-preventing device for movable contact of moulded case circuit breaker |
| CN102420082B (en) * | 2011-08-09 | 2016-04-27 | 无锡新宏泰电器科技股份有限公司 | Device for preventing moving contact of moulded case circuit breaker from falling |
| CN104576247A (en) * | 2015-01-05 | 2015-04-29 | 无锡新宏泰电器科技股份有限公司 | Falling-prevention single-break contact operation mechanism |
| CN106653412A (en) * | 2016-12-30 | 2017-05-10 | 无锡新宏泰电器科技股份有限公司 | Moving contact clamping structure for circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20160820 |