EP0482191A1 - Borne a vis. - Google Patents

Borne a vis.

Info

Publication number
EP0482191A1
EP0482191A1 EP91920955A EP91920955A EP0482191A1 EP 0482191 A1 EP0482191 A1 EP 0482191A1 EP 91920955 A EP91920955 A EP 91920955A EP 91920955 A EP91920955 A EP 91920955A EP 0482191 A1 EP0482191 A1 EP 0482191A1
Authority
EP
European Patent Office
Prior art keywords
screw
clamping
clamping plate
clamp
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91920955A
Other languages
German (de)
English (en)
Other versions
EP0482191B1 (fr
Inventor
Gottfried Alsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0482191A1 publication Critical patent/EP0482191A1/fr
Application granted granted Critical
Publication of EP0482191B1 publication Critical patent/EP0482191B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/301—Clamped connections, spring connections utilising a screw or nut clamping member having means for preventing complete unscrewing of screw or nut

Definitions

  • the invention relates to a screw terminal for the electrical connection of in particular cables or wires equipped with eyelet-shaped cable lugs, with a housing and a clamping screw which passes through a first clamping plate in the screwing direction and a second clamping plate when the clamp is closed, and in when the clamp is open a bore of the first clamping plate remains immersed and clears the space between the first and the second clamping plate, the clamping screw being screwable in the bore of the first clamping plate and the second clamping plate having a bore with a screw thread, and the shaft of the clamping screw in an area adjacent to the screw head, the axial length of which corresponds at least to the axial length of the engagement of the first clamping plate in screw threads of the clamping screw, is reduced to a small diameter.
  • Screw terminals of this type are used, for example, as connecting terminals for switches, electrical devices, such as motors, or also sockets.
  • a clamp has become known from US Pat. No. 4,611,876.
  • the second clamping plate is arranged stationary in the housing, while the first clamping plate is displaceable in the axial direction.
  • the clamping screw is guided in a cage connected to the first clamping plate. This cage is non-rotatable and axially displaceable in the housing with play.
  • this cage with the first clamping plate either falls on the second clamping plate or moves away from it.
  • the free distance between the first and the second clamping plate is therefore not guaranteed when the clamp is open, so that the insertion of the cable or the Cable lug between the first and the second clamping plate is difficult when the clamp is open. This is especially true when the screw terminal is difficult to access or when installing overhead.
  • the formation of the first clamping plate with a cage holding the clamping screw is complex.
  • the design according to the invention essentially consists in the fact that the first clamping plate is immovable and non-rotatable in the axial direction of the clamping screw and the second clamping plate in the axial direction of the clamping screw is displaceably and non-rotatably guided in the direction of the first clamping plate in the direction of the first clamping plate and that the second clamping plate is held by a slight resistance (for example due to friction) in the maximally opened clamping position, in which the clamping screw, when fully screwed in through the first clamping plate, grasps the nut thread of the second clamping plate and where the opening path of the clamping screw is limited by a stop on a wall part of the housing.
  • the stop for the opening path of the clamping screw can be easily formed by a wall part of the housing without the need for additional elements.
  • the opening path of the clamping screw is dimensioned so that the clamping screw remains in the open position in the bore of the first clamping plate and does not protrude beyond the clamping surface of the first clamping plate.
  • the second clamping plate which is non-rotatable and displaceable in the axial direction of the clamping screw, is held in the maximum open clamp position by a resistor is, this maximum opening position is guaranteed and the insertion of the cable or the cable lug is facilitated in this position of the screw terminal.
  • the second clamping plate can no longer fall to the first clamping plate due to gravity and thus block the insertion of the cable or the cable lug.
  • This resistance can in a simple manner be a frictional resistance which is sufficient to hold the second clamping plate in its maximum opening position, which is determined by a stop on the housing, but can be overcome without difficulty when the clamping plate is moved.
  • the bore of the first clamping plate is designed without a nut thread and the first clamping plate has inwardly projecting. Thread forming parts. Projections which engage in places in a thread of the clamping screw with play. This achieves the advantage that the projections allow the clamping screw to be screwed in until the second clamping plate is reached, but nevertheless release such play that the clamping screw can easily grasp the first thread of the nut thread of the second clamping bar.
  • these projections are completely released by the fact that the shaft of the clamping screw in the area of the screw head is designed to have a smaller diameter, so that the complete tightening of the second clamping plate is not hindered.
  • the second clamping plate at least one in the axial direction
  • Have clamping screw, perpendicular to the clamping surface, angled tab which is guided between the guide surfaces of the housing lying in the axial direction of the clamping screw and the tab is clamped with frictional engagement between these guide surfaces and in order to limit the friction to a small extent, these guide surfaces can have projections which clamp the tabs under friction.
  • resilient claws can be connected to the first clamping plate, the ends of which are curved in the direction of the axis of the clamping screw and overlap the second clamping plate and hold them back elastically in the maximum opening position of the clamp. In this way, the second clamping plate would be held more securely in its stop position on the housing and the resistance when moving this clamping plate is easier to set.
  • projections can be formed, for example, on projections on the threadless bore wall of the first clamping plate or by a burr which is cut by the clamping screw.
  • the arrangement is such that the projections engaging in a thread of the clamping screw are formed on an elastic disk connected to the first clamping plate, preferably made of spring plate, which is provided with a bore whose diameter is less than the outer diameter and larger than the core diameter of the screw thread of the clamping screw, from which some radial slots originate, which subdivide the inner region of the disk into tongues which engage in at least one screw thread of the clamping screw.
  • This elastic disc is preferably attached to a surface of the first clamping plate, for example by spot welding.
  • Hiebei can be attached to the clamping surface of the first clamping plate according to the invention and it can be the resilient claws which the second Grip over the clamping plate in its fully open position, consist of one piece with the resilient disc.
  • This resilient disc can preferably consist of beryllium bronze, which has good electrical conductivity and good elasticity.
  • Hiebei is expedient that the edge of the bore in the first clamping plate on the side facing the elastic washer is rounded or provided with a conical countersink in order to allow the tongues formed on the washer to deflect into the thread of the clamping screw.
  • the distance from the first clamping plate of the stop which delimits the opening movement of the clamping screw and is formed by a wall part of the housing is such that in the stop position the clamping screw plunges into the bore of the first clamping plate, but at least not projects significantly beyond the clamping surface of the first clamping plate. In this way, the clamping screw can be screwed into the projections of the bore of the first clamping plate until the clamping screw engages the second clamping plate.
  • the housing in the axis of the clamping screw can have an opening for the passage of a screwdriver, the smallest dimension of which is smaller than the diameter of the head of the clamping screw, so that the edge of this opening itself forms the stop for the opening path of the clamping screw.
  • the advantage is achieved that the clamping screw is captive and is protected via this counterbore.
  • the axial length of the threaded part of the clamping screw is greater than the axial distance of the clamping surface of the second clamping plate from the ridge or the inwardly projecting projections or the elastic disc of the first clamping plate or with the clamp open to the maximum Clamping screw with security through the Opening of the first clamping plate can be screwed in until the second clamping plate is gripped at the maximum open position of the clamp.
  • the free end of the shaft of the screw to be designed as a threadless centering pin so that the thread of the second clamping plate is secured.
  • the bore of the second clamping plate is formed with a normal screw thread.
  • the play between the rigid projections or the burr of the first clamping plate and the thread of the clamping screw is expediently dimensioned such that the projections or the engaging burr engaging in a thread turn of the screw lie on a clear diameter which is at least 30% , preferably 40 to 70%, the difference between the core diameter and the outer diameter of the screw is greater than the core diameter of the screw.
  • FIG. 1 shows a switching plane of a packet switch equipped with screw terminals according to the invention in cross section
  • FIG. 2 shows a radially slotted spring washer plate for forming projections engaging in a thread of a clamping screw according to arrow II in FIG .l.
  • 3 and 5 show a modified embodiment of the screw clamp
  • FIG. 3 showing the screw clamp in the open position and FIG. 4 in the closed position
  • FIG. 5 the spring washer according to FIGS. 3 and 4 in a view from below represents.
  • 6, 7 and 8 show yet another embodiment of the clamp
  • FIG. 6 a section along line VI-VI of FIG. 7, FIG.
  • FIG. 7 a section along line VII-VII of FIG. 6 and FIG shows a pictorial view of the first clamping plate according to FIG. 6 from below.
  • a packet switch of which ix Fig.l a switching level is shown in cross section, has a number of cams 1 which can be actuated by means of a common shaft and which actuate spring-loaded contact bridges 4, 5 via plungers 2, 3.
  • the fixed contacts 6 and 7 assigned to the contact bridge 4 are provided with screw terminals.
  • Each screw terminal essentially consists of a clamping screw 8 as well as a first clamping plate 9 connected to the fixed contact 7 and one in the housing. 10 of the switching plane displaceably and non-rotatably guided second clamping plate 11.
  • the guides arranged in the housing 10 for the axial, non-rotatable displacement of the second clamping plate 11 are not shown.
  • the shaft of the screw 8 is in a region 12 adjacent to the head to a smaller diameter, for example a r. the core diameter, offset, the axial length of this area of the shaft corresponding at least to the thickness of the first clamping plate 9.
  • a threadless centering pin 13 is formed at the free end of the shaft of the screw 8.
  • inwardly projecting projections 14 are formed in the bore for the screw 8, which engage in a thread of the threaded portion of the screw 8 with play and perform the function of a nut thread.
  • These projections 14 can also be formed by a ridge which is cut by the clamping screw 8.
  • the screw 8 cannot fall out of the housing 10 made of insulating material, for example plastic, since the housing opening 15 provided for actuation by a screwdriver has a smaller dimension than the screw head 22 of the clamping screw 8 the requirements for safe touch of live parts of the switch are taken into account.
  • cable lugs with an annularly closed outline and wire eyelets can easily be inserted between the two clamping plates 9 and 11. Since the free end of the shaft of the screw 8 remains in the bore of the first clamping plate 9 and also the centering pin 13 between the projections 14 when the clamp is open, a centered screwing in of the screw for tightening the screw clamp is possible at any time without difficulty.
  • FIG. 1 In the upper left quadrant of Fig.l and in Fig.2, another embodiment of the projections for holding and guiding the screw 8 on the first clamping plate 16 is shown.
  • the first clamping plate 16 is provided for the passage of the screw 8 with a threadless bore 17, the diameter of which allows the threaded portion of the screw 8 to pass with play.
  • a washer 18 made of spring plate is provided here, which rests on the side of the first clamping plate 16 facing away from the second clamping plate 11 and is fixed to the first clamping plate 16 with a few welding spots 19 along its outer edge .
  • the clamping screw 8 can also be pressed in a ratchet-like manner between these elastic projections in the radial direction without exerting a rotary movement until the centering pin 13 enters the threaded bore of the second clamping plate 11, after which the screw clamp is then tightened by turning the screw 8.
  • the housing 27 made of insulating material or plastic is formed with a slot 30.
  • the second clamping plate 29 has a vertically angled tab 28, which extends in the axial direction of the clamping screw 8 and dips into the slot 30. In this slot 30, the tab 28 is guided with friction.
  • elevations 31 On the inside of the wall of the slot 30 are elevations 31 which are integral with the housing exist, arranged, between which the tab 28 is guided with friction. These projections 31 make the degree of friction easier to adjust.
  • the complete opening position of the second clamping plate 29 is determined by a stop 36 formed in the housing.
  • the first clamping plate 32 is again non-rotatable and axially immovable, while the second clamping plate 29 is non-rotatable and axially displaceable by the tab 28.
  • the elastic disk 33 is now arranged on the side of the clamping surface of the first clamping plate 32 and, as shown in FIG. 5, is riveted to the first clamping plate 32 at 35.
  • These rivets 35 can either be formed as continuous rivets or they can be formed by projections of the first clamping plate 32, which are riveted after the elastic washer 33 has been put on.
  • the elastic disk 33 again has a central bore, from which slots 37 extend, which subdivide the edge of the bore into tongues 34.
  • Six tongues 34 are arranged here and the slots 37 are of such a width that the tongues 34 do not abut one another. This makes it easier to screw in the clamping screw 8, with the tongues 34 being bent.
  • the second clamping plate 43 of the fully open position is held back against the stop of the housing which limits the opening movement not by friction but by resilient claws 40.
  • These resilient claws 40 are on two opposite sides arranged and have at their end an inwardly projecting curvature 41 which overlap the edge of the second clamping plate 43.
  • the housing has recesses 42 in order to allow the ends of the resilient claws 40 to rebound.
  • the resilient claws 40 are formed in one piece with the resilient disk 39.
  • the resilient disk 39 is again designed and arranged in the same way as the resilient disk 33 according to FIGS. 3 to 5.
  • the second clamping plate 43 is shown in plan view, the housing 47 consisting of insulating material or plastic being shown in partial section.
  • the resilient claws 40 are arranged on opposite sides of the second clamping plate 43.
  • projections 45 are also arranged on the clamping plate, which are guided in the axial direction of the clamping screw 8, the grooves 46 of the housing 47 and ensure the non-displacement of the second clamping plate 43. In this way, the cable or the cable lug can be easily inserted between the first clamping plate 38 and the second clamping plate 43 in the direction of arrow 44 when the clamp is open.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Discharge Heating (AREA)
  • Pens And Brushes (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Insulated Conductors (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Dowels (AREA)

Abstract

Dans une borne à vis utilisée pour la connexion électrique, notamment de câbles ou de fils munis de cosses en forme d'oeillet, comprenant un logement (10) et une vis de serrage (8) traversant, dans le sens du vissage, une première plaque de fixation (9, 16) et, une fois la borne fermée, une deuxième plaque de fixation (11), la première plaque de fixation (9, 16) est montée de façon qu'elle soit immobilisée en rotation et non mobile axialement, tandis que la deuxième plaque de fixation (11) est guidée dans le logement (10) de façon qu'elle soit mobile axialement et immobilisée en rotation. Lorsque la borne est complétement ouverte, la deuxième plaque de fixation (11) prend appui contre une butée du logement (10) et est maintenue dans cette position par une force opposée qui peut être dominée par la vis de serrage (8), de sorte que l'ouverture pour l'introduction du câble ou de la cosse se trouve dégagée. La vis de serrage (8) peut être vissée dans un alésage (17) de la première plaque (9, 16) jusqu'à venir en prise avec la deuxième plaque (11). A cet effet, l'alésage (17) de la première plaque (9, 16) est réalisé sans filetage femelle et il est prévu des saillies (14 ou 25) s'engageant uniquement dans les filets de la vis de serrage (8).
EP91920955A 1990-05-02 1991-05-02 Borne a vis Expired - Lifetime EP0482191B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT996/90 1990-05-02
AT99690 1990-05-02
PCT/AT1991/000062 WO1991017588A1 (fr) 1990-05-02 1991-05-02 Borne a vis

Publications (2)

Publication Number Publication Date
EP0482191A1 true EP0482191A1 (fr) 1992-04-29
EP0482191B1 EP0482191B1 (fr) 1995-04-19

Family

ID=3504547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91920955A Expired - Lifetime EP0482191B1 (fr) 1990-05-02 1991-05-02 Borne a vis

Country Status (17)

Country Link
US (1) US5249989A (fr)
EP (1) EP0482191B1 (fr)
JP (1) JP2583711B2 (fr)
AT (1) ATE121567T1 (fr)
AU (1) AU647478B2 (fr)
BR (1) BR9105734A (fr)
CA (1) CA2063428A1 (fr)
DE (1) DE59105253D1 (fr)
DK (1) DK0482191T3 (fr)
ES (1) ES2073185T3 (fr)
FI (1) FI916183A7 (fr)
IE (1) IE911464A1 (fr)
NO (1) NO920004D0 (fr)
NZ (1) NZ238010A (fr)
WO (1) WO1991017588A1 (fr)
YU (1) YU48110B (fr)
ZA (1) ZA913292B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9408878D0 (en) * 1994-05-05 1994-06-22 Amp Gmbh Electrical connector assembly with screw clamp terminals
US5747741A (en) * 1995-06-16 1998-05-05 Hubert Laurenz Naimer Screw terminal for an electrical connection of cables or wires
ES2122901B1 (es) * 1996-06-03 1999-08-01 Power Controls Iberica Sl Dispositivo de desplazamiento guiado de tornillos de bornes de conexion para aparellaje electrico.
DE29610330U1 (de) * 1996-06-12 1996-08-14 Siemens AG, 80333 München Schaltgerät mit Einschraubsicherung
DE29713205U1 (de) * 1997-07-24 1997-09-25 Siemens AG, 80333 München Eindrehsicherung gegen selbständiges Eindrehen einer Anschlußschraube
DE19951789A1 (de) * 1999-10-27 2001-05-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Anschlussklemme
US6926537B1 (en) 2004-06-21 2005-08-09 Amphenol Corporation Interposer assembly
DE102007039709A1 (de) * 2007-08-22 2009-02-26 Abb Ag Installationsschaltgerät mit einer Anschlussklemmenanordnung
US8241074B2 (en) * 2009-03-18 2012-08-14 Siemens Industry, Inc. Circuit breakers with lug screw retention and methods for manufacturing same
US7909633B1 (en) * 2009-09-15 2011-03-22 Fisher-Rosemount Systems, Inc. Wire connection apparatus
CN202076511U (zh) * 2010-11-01 2011-12-14 洛克威尔自动控制技术股份有限公司 接线端组件
US8608518B2 (en) * 2012-05-16 2013-12-17 Dinkle Enterprise Co., Ltd. Wire-grasping structure for terminal block
DE102016111711A1 (de) * 2016-06-27 2017-12-28 Abb Schweiz Ag Installationsschaltgerät mit einem Gehäuse und mit einer Schraubanschlussklemme
US11128071B2 (en) * 2019-10-25 2021-09-21 Schweitzer Engineering Laboratories, Inc. Interface for a printed circuit board assembly adapter module
US11502431B1 (en) * 2021-04-28 2022-11-15 Te Connectivity Germany Gmbh Terminal having a bolt section
US12112911B2 (en) * 2021-11-30 2024-10-08 Schneider Electric USA, Inc. Electrical connector assemblies

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Publication number Priority date Publication date Assignee Title
DE2452091C3 (de) * 1974-11-02 1979-01-11 Danfoss A/S, Nordborg (Daenemark) Vorrichtung zum Festklemmen miteinander elektrisch zu verbindender Leiter
FR2462793A1 (fr) * 1979-08-03 1981-02-13 Legrand Sa Appareillage electrique a vis imperdable
JPS56142198A (en) * 1980-03-28 1981-11-06 Tominaga Oil Pump Liquid feeder
FR2538174B1 (fr) * 1982-12-16 1985-06-28 Electricfil Embout connecteur pour cable electrique
FR2557739B1 (fr) * 1983-12-30 1986-05-02 Telemecanique Electrique Borne imperdable universelle destinee a la realisation de connexions electriques par serrage entre deux elements conducteurs
JPS6320061U (fr) * 1986-07-23 1988-02-09
DE8702835U1 (de) * 1987-02-25 1988-03-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anschlußklemme für elektrische Installationsgeräte
FR2611992B1 (fr) * 1987-02-27 1989-05-05 Alsthom Cgee Agencement de raccordement a vis pour fils et cosses electriques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9117588A1 *

Also Published As

Publication number Publication date
WO1991017588A1 (fr) 1991-11-14
FI916183A0 (fi) 1991-12-31
YU73491A (sh) 1994-06-24
EP0482191B1 (fr) 1995-04-19
DE59105253D1 (de) 1995-05-24
NO920004L (no) 1992-01-02
US5249989A (en) 1993-10-05
JP2583711B2 (ja) 1997-02-19
ZA913292B (en) 1992-02-26
YU48110B (sh) 1997-03-07
NO920004D0 (no) 1992-01-02
CA2063428A1 (fr) 1991-11-03
BR9105734A (pt) 1992-06-02
NZ238010A (en) 1994-06-27
FI916183A7 (fi) 1991-12-31
AU7774091A (en) 1991-11-27
JPH04507173A (ja) 1992-12-10
IE911464A1 (en) 1991-11-06
DK0482191T3 (da) 1995-07-24
AU647478B2 (en) 1994-03-24
ES2073185T3 (es) 1995-08-01
ATE121567T1 (de) 1995-05-15

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