DK156343B - SWITCHING ARRANGEMENTS FOR ELECTRIC SWITCHES - Google Patents

Description

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DK 156343 BDK 156343 B

Opfindelsen angâr et kontaktarrangement til elektriske afbrydere med to faststâende str0mtil- og -bortledende kontaktdele og en bevæge-lig kontaktbro, som bestâr af to pâ en skyder lejrede og med fjedre sammentrykkede vaisekontaktdele, som ruller pâ to fra hinanden bortven-5 dende kontaktflader pâ hver af kontaktdelene.BACKGROUND OF THE INVENTION The present invention relates to a contact arrangement for electrical switches having two fixed current-and-conductive contact parts and a movable contact bridge consisting of two on one slider bearing and with spring-compressed wire contact parts which roll on two distant contact surfaces on each of the contact parts.

Ved en kendt afbryder af den ovennævnte art (DE-patentskrift 92 07 32) er valsekontaktdelene lejret via kuglelejer og afslutningsstykker i en slæderamme, hvorhos kuglelejerne over i slæderne f^rte boite trykkes mod hinanden og mod de faststâende kontaktdele ved hjælp af fjedre.In a known switch of the above-mentioned type (DE patent specification 92 07 32), the roller contact parts are mounted via ball bearings and terminals in a sliding frame, where the ball bearings are pushed into the sleeve's anterior body against each other and against the fixed contact parts by springs.

10 Bortset fra det relativt store opbud til lejringen af valsekontaktdelene forekommer der ved indkoblingen relativt store friktionstab som f01ge af friktion mellem afslutningsstykkerne i slæderammen og boltene i slæden, hvilket betyder en relativt stor indkoblingskraft. Til grand for den foreliggende opfindelse ligger sâledes den opgave at reducere 15 indkoblingskraften ved et kontaktarrangement af den ovennævnte art.Apart from the relatively large supply for the bearing of the roller contact parts, there are relatively large frictional losses due to coupling as a result of friction between the end pieces in the sled frame and the bolts in the sled, which means a relatively large engagement force. Accordingly, the object of the present invention is to reduce the switching power of a contact arrangement of the above-mentioned type.

Dette opnâs pâ enkel mâde ved et kontaktarrangement af den ovennævnte art ved, at lejringen til valsekontaktdelene finder sted i en som fφ-ringskulisse virkende âbning pâ skyderen, at âbningerne er indbyrdes adskilt ved hjælp af en ribbe, mod hvilken valsekontaktdelene ligger an 20 i kontaktarrangementets udkoblede tilstand, og at der til hver af de mod âbningen vendende ribbeflader slutter sig en skrâ anlægsflade til den tilh0rende valsekontaktdel, der hælder i en pâ 90’ i forhold til skyderens indkoblingsbevægelsesretning afvigende retning mod indkob-lingsbevægelsesretningen.This is achieved in a simple manner by a contact arrangement of the above-mentioned type, in that the bearing for the roller contact parts takes place in a sliding opening on the slider, that the openings are separated by a rib, against which the roller contact parts abut in the contact arrangement. and each of the rib faces facing the aperture joins a sloping abutment surface with the associated roller contact portion inclined in a 90 'to the direction of engagement of the slider in a different direction of engagement.

25 Det er til mindskelse af indkoblingskraften i og for sig kendt at benytte en kulisse (DE-brugsm0nster 16 97 353). Endvidere er skrâf0rin-gen af kontaktbroer pâ skydere kendt, for derved at lade kontaktbroen glide pâ de faststâende kontaktelementer under friktion (DE-brugsm0n-ster 18 72 034).25 It is known to use a backdrop to reduce the switch-on power per se (DE usage pattern 16 97 353). Furthermore, the arrangement of contact bridges on sliders is known, thereby allowing the contact bridge to slide on the fixed contact elements during friction (DE usage pattern 18 72 034).

30 For pâ begge kontaktdele at opnâ de samme trykforhold uden væsent- ligt opbud er det hensigtsmaessigt, at valsekontaktdelene pâ begge sider af skyderen trykkes mod hinanden af hver sin armf jeder. En f0ring af valsekontaktdelene i længderetningen af valsekontaktdelene og dermed samtidig en fastholdelse, praktisk taget uden meropbud, opnâs, hvis 35 armene pâ fjederen ligger i noter i valsekontaktdelene.30 In order to achieve the same pressure conditions on both contact portions without significant bending, it is desirable that the roller contact portions on both sides of the slider be pressed against each other by each arm spring. A lengthening of the roll contact portions in the longitudinal direction of the roll contact portions and thus at the same time a restraint, practically without additional supply, is obtained if the 35 arms of the spring lie in notes in the roll contact portions.

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DK 156343 BDK 156343 B

Ved hjælp af tegningen beskrives et udf0relseseksempel for opfin-delsen, og virkemâden. forklares nærmere.The drawing describes an embodiment of the invention and the method of operation. explained in more detail.

Pâ tegningen viser: 5 fig. 1 delvis i snit det i en sikringsafbryder indbyggede kon- taktsystem set fra siden, fig. 2 delvist i snit den af sikringsafbryderen udtagne skyder inklusive de bevægelige kontaktdele, i det foreliggende tilfælde valsekontaktdelene, set fra siden, 10 fig. 3 den med valsekontaktdele udstyrede skyder set ovenfra, hvorhos to fastkontaktdele er antydet fjernet fra sky-deren, og fig. 4 kulissens form i forst0rret gengivelse.In the drawing: 1 is a partial sectional side view of the contact system built into a circuit breaker; FIG. 2 is a partial sectional side view of the slider taken out by the fuse switch including the moving contact parts, in this case the roller contact parts, as seen from the side; FIG. 3 is a plan view of the slider with roller contact portions, two fixed contact portions having been impliedly removed from the slider; and FIG. 4 Scenery shape in enlarged rendering.

15 I huset 1 i den i fig. 1 viste sikringsafbryder er de faststâende kontaktdele 2 eller 3 fastgjort ved hjælp af skruer 4, af hvilke kon-taktdelene 3 stâr i forbindelse med en lavspændings-h0jeffektsikring 5, sâledes at to kontaktsteder er koblet bag hinanden. De faststâende kontaktdele 2 og 3 er ved hjælp af de med de bevægelige kontaktdele dan-20 nede valsekontaktdele 5, som pâ begge sider af de faststâende kontaktdele 2 og 3 ligger an mod disse, forbundet elektrisk ledende. Bevægel-sen af valsekontaktdelene 6 sker via en skyder 7, i hvilken valsekon-taktdelene 6 hver via en armfjeder 8 er f0rt fjederbelastet forskyde-ligt i retning mod de faststâende kontaktdele 2, 3. Enderne 9 af arm-25 fjederen 8 ligger i noter 10 i valsekontatkdelene 6, sâledes at valsekontaktdelene i længderetningen er sikret ved hjælp af armf jedrene mod forskydning. De mellem enderne 9 af hver af de to armf jedre 8, som. pâ begge sider af skyderen 7 er anbragt i tilsvarende udsparinger 11, lig-gende dele 12 af valsekontaktdelene f0res i âbninger 13 i skyderen ved 30 at glide pâ de skrâ pâl0bsflader 14 pâ de faststâende kontaktdele 2, 3.In the housing 1 in the embodiment of FIG. 1, the fixed contact portions 2 or 3 are secured by means of screws 4, of which the contact portions 3 are connected in connection with a low voltage high-power fuse 5, so that two contact points are connected behind one another. The fixed contact portions 2 and 3 are connected by means of the roller contact portions 5 formed by the movable contact portions, which on both sides of the fixed contact portions 2 and 3, are electrically conductive. The movement of the roller contact portions 6 takes place via a slider 7, in which the roller contact portions 6 are each driven via a spring spring displaceably in the direction of the fixed contact portions 2, 3. The ends 9 of the arm spring 8 lie in notes. 10 in the roll contact portions 6, so that the longitudinal roll contact portions are secured by means of the arm springs against displacement. The between the ends 9 of each of the two arm springs 8, which. on both sides of the slider 7 are arranged in corresponding recesses 11, lying parts 12 of the roller contact parts are inserted into openings 13 in the slider by sliding on the inclined contact surfaces 14 on the fixed contact parts 2, 3.

I hviletilstanden ved ikke lukket kontakt ligger valsekontaktdelene 6 pâ ribber 15, som begrænser den ene side af âbningerne 13. Âbningerne 13 er endvidere forsynet med en anlægsflade 16 til valsekontaktdelene 6, som ligger i en retning pâ 90* fra den med pilen 17 antydede bevæg-35 elsesretning for skyderen 7. Valsekontaktdelene 6 glider sâledes ved - 3 -In the resting state of non-closed contact, the roller contact parts 6 lie on ribs 15 which restrict one side of the openings 13. The openings 13 are further provided with a contact surface 16 for the roller contact parts 6, which lies in a direction of 90 * from the movement indicated by arrow 17 -35 direction of slider 7. The roller contact parts 6 thus slide at - 3 -

DK 156343 BDK 156343 B

bevægelsen af skyderen i pileretningen 17 ikke i en pâ bevaegelsesret-ningen vinkelret liggende retning, sâledes som dette hidtil var for normalt kendte afbrydere med dobbeltbroer og ogsâ ved valsekontakterj men kan mod bevægelsesretningen udf0re en ubetydelig bevaegelse/ sâledes 5 at der raindst ved indkoblingen ikke blot fremkommer en vinkelret pâ de faststâende kontaktdele virkende trykkomponent, men ogsâ en som haelder i forhold dertil. Resuitatet af denne kraftforskydning er reducering af indkoblingskraften og opnâelsen af en lille preltid og dermed en for-mindskelse af svejsetendensen uden at skulle beh0ve omstændelige mid-10 1er.the movement of the slider in the direction of arrow 17 is not in a direction perpendicular to the direction of movement, as was heretofore known to normally known switches with double bridges and also at rolling contact, but can make a slight movement towards the direction of movement so that not only during the switch-on a perpendicular to the pressure component acting on the fixed contact parts appears, but also one which is inclined in relation thereto. The result of this power shift is the reduction of the switch-on power and the attainment of a small bead time and thus a reduction of the welding tendency without the need for complicated means.

Claims (3)

1. Kontaktarrangement til elektriske afbrydere med to faststâende str0mtil- og -bortledende kontaktdele (2, 3) og en bevasgelig kontakt-bro, som bestâr af to pâ en skyder (7) lejrede og med fjedre (8) sam-mentrykkede valsekontaktdeie (6), som ruller pâ to fra hinanden bort- 5 vendende kontaktflader pâ hver af kontaktdelene (6), kendeteg-n e t ved, at lejringen til valsekontaktdelene (6) finder sted i en som f0ringskulisse virkende âbning (13) pâ skyderen (7), at âbningerne (13) er indbyrdes adskilt ved hjælp af en ribbe (15), mod hvilken valsekontaktdelene (6) ligger an i kontaktarrangementets udkoblede til-10 stand, og at der til hver af de mod âbningen vendende ribbeflader slut-ter sig en skrâ anlægsflade (16) til den tilh0rende valsekontaktdel (6), der hælder i en pâ 90’ i forhold til skyderens (7) indkoblingsbe-vægelsesretning afvigende retning mod indkoblingsbevægelsesretningen.1. Contact arrangement for electrical switches with two fixed current and conductive contact parts (2, 3) and a tangible contact bridge consisting of two mounted on a slider (7) and compressed with springs (8) compressed roller contact parts (6 ), which rolls on two facing contact surfaces on each of the contact parts (6), characterized in that the bearing for the roller contact parts (6) takes place in a sliding opening (13) on the slider (7). that the apertures (13) are spaced apart by a rib (15) against which the roller contact portions (6) abut in the disengaged state of the contact arrangement and that each of the rib faces facing the aperture terminates one inclined abutment surface (16) to the associated roller contact portion (6) inclined in a direction 90 of the direction of engagement of the slider (7) deviating from the direction of engagement movement. 2. Kontaktarrangement if01ge krav 1, kendetegnet ved, at 15 valsekontaktdelene (6) pâ begge sider af skyderen (7) trykkes mod hinanden af hver sin armfjeder (8).2. Arrangement according to claim 1, characterized in that the roller contact parts (6) on both sides of the slider (7) are pressed against each other by each arm spring (8). 3. Kontaktarrangement if01ge krav 2, kendetegnet ved, at armene pâ fjederen (8) ligger i noter (10) i valsekontaktdelene (6). 20Contact arrangement according to claim 2, characterized in that the arms of the spring (8) lie in grooves (10) in the roller contact parts (6). 20