EP0452929B1 - Clip for anchoring clamps to terminals - Google Patents

Clip for anchoring clamps to terminals Download PDF

Info

Publication number
EP0452929B1
EP0452929B1 EP91106229A EP91106229A EP0452929B1 EP 0452929 B1 EP0452929 B1 EP 0452929B1 EP 91106229 A EP91106229 A EP 91106229A EP 91106229 A EP91106229 A EP 91106229A EP 0452929 B1 EP0452929 B1 EP 0452929B1
Authority
EP
European Patent Office
Prior art keywords
terminal bar
leg
clip
sleeve
bar
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.)
Expired - Lifetime
Application number
EP91106229A
Other languages
German (de)
French (fr)
Other versions
EP0452929A2 (en
EP0452929A3 (en
Inventor
Franco Paolo Pardini
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.)
CGE Generale Elettromeccanica SpA
Original Assignee
CGE Generale Elettromeccanica SpA
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 CGE Generale Elettromeccanica SpA filed Critical CGE Generale Elettromeccanica SpA
Publication of EP0452929A2 publication Critical patent/EP0452929A2/en
Publication of EP0452929A3 publication Critical patent/EP0452929A3/en
Application granted granted Critical
Publication of EP0452929B1 publication Critical patent/EP0452929B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw
    • 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
    • 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
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut

Definitions

  • the present invention pertains to a clip anchoring an eyelet terminal clamp to a terminal bar of an electric device or machine, being said clamp provided to receive and connect external supply conductors, allowing to said clip to fasten in simple and fast way the eyelet terminal to the terminal bar.
  • the clamps can be manufactured integral with the terminals themselves, what allows particularly safe clamping and connection, but implies a very high cost, only justifiable for high cost machines and devices.
  • the clamps can be manufactured separated from the terminals at a quite lower cost, but in such a case a particularly careful manufacture is needed to avoid possible poor connections and consequent overheatings.
  • One of the most common clamps is the socalled "eyelet” clamp comprised of a sleeve shaped metal member provided with threaded clamping means allowing to clamp inside said sleeve a cable to be connected thereto.
  • a partial solution for this problem is to provide an insulating basis, bearing said terminals, with bracket protrusions on which can be supported said clamps when they are loosed. Said solution is only partial because can assure a gravity support of the clamps on said brackets which, for its shape is rather problematic.
  • DE-A-3413740 discloses a screw clamp consisting of a clamp body or sleeve, surrounding a terminal bar, provided with a screw crossing an upper side of the sleeve and resting on the terminal bar to move the sleeve in relation to the terminal bar itself, in order to grip a line conductor between the movable sleeve and the terminal bar, and with a U-shaped fastening clip enclosing between its legs the terminal bar and the upper side of the sleeve, wherein the upper leg does not contact the upper side of the sleeve but is engaged, by means of a slit, in a neck provided in the screw between the threaded shank and the head of the screw itself.
  • a clip according to the present invention for fastening to a terminal bar an eyelet clamp, thereon inserted, consisting of a sleeve formed from a folded metallic strip, comprises a stiff and resilient bent sheet structure characterized in that it is formed by two U-shaped bends folded in opposite directions and side by side arranged, of which one encloses the terminal bar and the other encloses a bottom portion of the sleeve, to keep permanently fastened said sleeve against said terminal bar, being a leg common to the two U-shaped bends provided with a tang punched therefrom and raised for engaging a through hole pierced through said bar and therefrom disengageable just on purpose by using a suitable tool; further said clip is made of resilient metallic materials, such as bronze or beryllium copper, and is punched for having the first leg put against the terminal bar, followed by at least a leg folded in a first direction to span said terminal bar and by another leg folded in opposite direction to span the bottom portion of said sleeve, being said first
  • said clip on a side is provided with two parallel legs spanning the terminal bar and on the other side is provided with another single leg spanning the bottom portion of the sleeve.
  • the leg of the clip spanning the bottom portion of the sleeve has a protrusion engaging a seat of an insulating base of the terminal bar for providing an additional support to said leg in order to have a safer fastening action of the clamp to the terminal bar.
  • an eyelet clamp 10 is seen as comprising a rectangular sleeve 12, obtained by folding a metal strip, which surrounds a terminal bar 14 coming out from an insulating basis 16.
  • Said sleeve 12 has two superimposed sides 18 and 20 through which pass a screw 22 whose threaded stem is engaged in a threaded hole 24 crossing the upper side 18 of the sleeve 12, while the lower side 20 has a not threaded larger hole 26 crossed, without be engaged, by the screw 22.
  • Said screw ends with a fastening plate 28 having the task to fasten a possible cable against the terminal 14, assuring connection therewith.
  • the sleeve 12 has a lower side 30, opposed to the superimposed sides 18 and 20, passing around the terminal 14 and therewith anchored by means of a clip 40 according to the present invention.
  • the clip 40 is comprised of a punched metallic strip from which protrude a downwards bent leg 44, for engaging the side 30 of the sleeve 12, possibly ending with a restricted area 46 to be engaged in a support seat 48 into the insulating basis 16 (figures 1 and 2), and two legs 50 and 52 upwards bent, for engaging the terminal bar 14.
  • the tang 54 is provided to be possibly lowered just to clear the clip 40 from the bar 14 and allow the replacement of the clip 40 itself or the whole eyelet clamp 10, should it be damaged.
  • the operation of the present invention is the following one: when it is intended to fasten an eyelet clamp 10 to a terminal bar 14, a clip 40 is grasped and inserted around the side 30 of the clamp sleeve 12 with the leg 44 thereof engaging said side. Then the assembly of the sleeve 12 and clip 40, inserted around the side 30, is taken and iserted around the terminal bar 14 in such a way that the two legs 50 and 52 engage said bar 14 and the tang 54 is flattened, passing under the bar 14, meeting the hole 56 through the bar, getting rid and getting the orientation depicted in figures 2 and 3, so that said tang 54 tends to engage the walls of the hole 56 at any attempt to extract the clip 40 from the terminal bar 14, making impossible to disconnect the eyelet clamp 10 from the bar 14, unless an interrvention through a tool is made on the tang to lower it, permitting the extraction of the clip 40 from bar 14. Once extracted from the bar 14, the clip 40 is esaslily extracted from the sleeve 12 of the clamp 10, allowing any clamp
  • the leg 44 could be upwards folded for engaging the bar 14 and the legs 50 and 52 downwards folded for engaging the side 30 of the sleeve 12, being in this case sufficient to add a hole in the leg 44, coincident with the hole 56 of the bar 14, for allowing the insertion of a tool for the disengagment of the tang 54.

Landscapes

  • Clamps And Clips (AREA)
  • Cable Accessories (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Road Signs Or Road Markings (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Multi-Conductor Connections (AREA)

Abstract

Clip for anchoring eyelet clamps (10) to terminal bars (14) of a machine or electric equipment or device comprised of a punched and double folded metallic resilient strip, consisting in a body (42) from which a downwardly turned leg (44), two parallel upwardly turned legs (50, 52) and a diasgonally lifted anchoring tang (54), to engage a through hole (56) of the terminal bar (14), depart, needing the tang (54) the intervention of a specific tool to be disengaged from the hole (56) of the terminal bar (14). <IMAGE>

Description

  • The present invention pertains to a clip anchoring an eyelet terminal clamp to a terminal bar of an electric device or machine, being said clamp provided to receive and connect external supply conductors, allowing to said clip to fasten in simple and fast way the eyelet terminal to the terminal bar.
  • It is well known that the clamp of electric machines and devices must be provided with means to connect cables thereto. Should the currents through said terminals be high (from tens to hundreds of amperes) there is the need to use clamps surely connecting, with the lowest the possible contact resistance, said cables to said terminals.
  • The clamps can be manufactured integral with the terminals themselves, what allows particularly safe clamping and connection, but implies a very high cost, only justifiable for high cost machines and devices.
  • Alternatively, the clamps can be manufactured separated from the terminals at a quite lower cost, but in such a case a particularly careful manufacture is needed to avoid possible poor connections and consequent overheatings.
  • One of the most common clamps is the socalled "eyelet" clamp comprised of a sleeve shaped metal member provided with threaded clamping means allowing to clamp inside said sleeve a cable to be connected thereto.
  • The problem connected with this eyelet clamps is their mobility with respect to the terminals, with the risk of a loss, occurring when said clamps are loosed.
  • A partial solution for this problem is to provide an insulating basis, bearing said terminals, with bracket protrusions on which can be supported said clamps when they are loosed. Said solution is only partial because can assure a gravity support of the clamps on said brackets which, for its shape is rather problematic.
  • It could be possible to remedy this fact by conforming said bracket protrusions with seats forcefully housing said clamps, but this implies higher expenses and larger size of the insulating basis, which not always are permitted.
  • DE-A-3413740 discloses a screw clamp consisting of a clamp body or sleeve, surrounding a terminal bar, provided with a screw crossing an upper side of the sleeve and resting on the terminal bar to move the sleeve in relation to the terminal bar itself, in order to grip a line conductor between the movable sleeve and the terminal bar, and with a U-shaped fastening clip enclosing between its legs the terminal bar and the upper side of the sleeve, wherein the upper leg does not contact the upper side of the sleeve but is engaged, by means of a slit, in a neck provided in the screw between the threaded shank and the head of the screw itself.
  • It is an object of the present invention to provide a resilient and conductive clip maintaining a clamp fastened to a terminal when is loose, but able to clear it through a specific intervention on a particular engaging means of said clip between said clamp and said terminal.
  • A clip according to the present invention for fastening to a terminal bar an eyelet clamp, thereon inserted, consisting of a sleeve formed from a folded metallic strip, comprises a stiff and resilient bent sheet structure characterized in that it is formed by two U-shaped bends folded in opposite directions and side by side arranged, of which one encloses the terminal bar and the other encloses a bottom portion of the sleeve, to keep permanently fastened said sleeve against said terminal bar, being a leg common to the two U-shaped bends provided with a tang punched therefrom and raised for engaging a through hole pierced through said bar and therefrom disengageable just on purpose by using a suitable tool;
    further said clip is made of resilient metallic materials, such as bronze or beryllium copper, and is punched for having the first leg put against the terminal bar, followed by at least a leg folded in a first direction to span said terminal bar and by another leg folded in opposite direction to span the bottom portion of said sleeve, being said first leg faced against the terminal bar provided with the above mentioned raised tang.
  • Preferably, said clip on a side is provided with two parallel legs spanning the terminal bar and on the other side is provided with another single leg spanning the bottom portion of the sleeve.
  • More preferably, the leg of the clip spanning the bottom portion of the sleeve has a protrusion engaging a seat of an insulating base of the terminal bar for providing an additional support to said leg in order to have a safer fastening action of the clamp to the terminal bar.
  • The features and the advantages of the present invention will be specified in the concluding part of this disclosure, while further features and advantages of an embodiment, herebelow given in a not limiting way, will be depicted in the following detailed description provided with the enclosed drawings, wherein:
    • figure 1 is a front view of an eyelet clamp anchored to a terminal by means of a clip according to the present invention;
    • figure 2 is a sectional view along a line 2-2 of the same clamp depicted in figure 1;
    • figure 3 is a perspective detailed view of a clip according to the present invention.
  • Considering specifically the figures 1 and 2, an eyelet clamp 10 is seen as comprising a rectangular sleeve 12, obtained by folding a metal strip, which surrounds a terminal bar 14 coming out from an insulating basis 16. Said sleeve 12 has two superimposed sides 18 and 20 through which pass a screw 22 whose threaded stem is engaged in a threaded hole 24 crossing the upper side 18 of the sleeve 12, while the lower side 20 has a not threaded larger hole 26 crossed, without be engaged, by the screw 22. Said screw ends with a fastening plate 28 having the task to fasten a possible cable against the terminal 14, assuring connection therewith.
  • The sleeve 12 has a lower side 30, opposed to the superimposed sides 18 and 20, passing around the terminal 14 and therewith anchored by means of a clip 40 according to the present invention.
  • Considering in addition the figure 3, the clip 40 according to the present invention is comprised of a punched metallic strip from which protrude a downwards bent leg 44, for engaging the side 30 of the sleeve 12, possibly ending with a restricted area 46 to be engaged in a support seat 48 into the insulating basis 16 (figures 1 and 2), and two legs 50 and 52 upwards bent, for engaging the terminal bar 14.
  • From the body 42 protrudes also an inclined tang 54 insetrable in a through hole 56 in the terminal bar 14, preventing unwanted extraction of the eyelet clamp 10 from the terminal bar 14, because it is impossible to extract the clip 40, being said tang able to be disengaged from said throug hole 56 just by means of the operation of a tool, as a screwdriver, lowering said tang 54 making it to pass under the bar 14.
  • The tang 54 is provided to be possibly lowered just to clear the clip 40 from the bar 14 and allow the replacement of the clip 40 itself or the whole eyelet clamp 10, should it be damaged.
  • The operation of the present invention is the following one:
    when it is intended to fasten an eyelet clamp 10 to a terminal bar 14, a clip 40 is grasped and inserted around the side 30 of the clamp sleeve 12 with the leg 44 thereof engaging said side. Then the assembly of the sleeve 12 and clip 40, inserted around the side 30, is taken and iserted around the terminal bar 14 in such a way that the two legs 50 and 52 engage said bar 14 and the tang 54 is flattened, passing under the bar 14, meeting the hole 56 through the bar, getting rid and getting the orientation depicted in figures 2 and 3, so that said tang 54 tends to engage the walls of the hole 56 at any attempt to extract the clip 40 from the terminal bar 14, making impossible to disconnect the eyelet clamp 10 from the bar 14, unless an interrvention through a tool is made on the tang to lower it, permitting the extraction of the clip 40 from bar 14. Once extracted from the bar 14, the clip 40 is esaslily extracted from the sleeve 12 of the clamp 10, allowing any clamp or clip substitution in case of damages thereto.
  • What has been hereabove disclosed is a not limiting embodiment of the present invention and it will be obvious to people skilled in the art to find equivalent means in manufacturing said clip, which must be considered as all here covered.
  • For example, according to a less preferred embodiment, the leg 44 could be upwards folded for engaging the bar 14 and the legs 50 and 52 downwards folded for engaging the side 30 of the sleeve 12, being in this case sufficient to add a hole in the leg 44, coincident with the hole 56 of the bar 14, for allowing the insertion of a tool for the disengagment of the tang 54.

Claims (3)

  1. Clip for fastening to a terminal bar (14) an eyelet clamp (10), thereon inserted, consisting of a sleeve (12) formed from a folded metallic strip, said clip comprising (40) a stiff and resilient bent sheet structure characterized in that it is formed by two U-shaped bends folded in opposite directions and side by side arranged, of which one encloses the terminal bar (14) and the other encloses a bottom portion (30) of the sleeve (12), to keep permanently fastened said sleeve (12) against said terminal bar (14), being a leg (42) common to the two U-shaped bends provided with a tang (54) punched therefrom and raised for engaging a through hole (56) pierced through said bar (14) and therefrom disengageable just on purpose by using a suitable tool;
    further said clip is made of resilient metallic materials, such as bronze or beryllium copper, and is punched for having the first leg (42) put against the terminal bar (14), followed by at least a leg (50 or 52) folded in a first direction to span or enclose said terminal bar (14) and by another leg (44) folded in opposite direction to span the bottom portion (30) of said sleeve (12), being said first leg (42) faced against the terminal bar (14) provided with the above mentioned raised tang (54).
  2. Clip for fastening an eyelet clamp (10) to a terminal bar (14), as in claim 1, characterized in that on a side is provided with two parallel legs (50, 52) spanning the terminal bar (14) and on the other side is provided with another single leg (44) spanning the bottom portion (30) of the sleeve (12).
  3. Clip for fastening an eyelet clamp (10) to a terminal bar (14), as in claim 2, characterized in that the leg (44), spanning the bottom portion (30) of the sleeve (12) has a protrusion (46) engaging a seat (48) of an insulating base (16) of the terminal bar (14) for providing an additional support to said leg (44) in order to have a safer fastening action of the clamp (10) to the terminal bar (14).
EP91106229A 1990-04-23 1991-04-18 Clip for anchoring clamps to terminals Expired - Lifetime EP0452929B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02105290U IT219489Z2 (en) 1990-04-23 1990-04-23 TERMINAL TERMINAL CLAMP ANCHORING CLAMP
IT2105290U 1990-04-23

Publications (3)

Publication Number Publication Date
EP0452929A2 EP0452929A2 (en) 1991-10-23
EP0452929A3 EP0452929A3 (en) 1992-07-15
EP0452929B1 true EP0452929B1 (en) 1995-11-22

Family

ID=11176007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106229A Expired - Lifetime EP0452929B1 (en) 1990-04-23 1991-04-18 Clip for anchoring clamps to terminals

Country Status (4)

Country Link
EP (1) EP0452929B1 (en)
AT (1) ATE130704T1 (en)
DE (1) DE69114752T2 (en)
IT (1) IT219489Z2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957738A (en) * 1997-09-23 1999-09-28 Yazaki Corporation Eyelet terminal with retainer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29712179U1 (en) * 1997-07-10 1997-09-18 Siemens Ag Switchgear with contact system
CN109861016B (en) * 2019-03-29 2024-01-09 广东电网有限责任公司 Prevent disconnected strand temporary ground wire fastener
CN110854552B (en) * 2019-10-17 2021-07-30 中航光电科技股份有限公司 Wire pressing terminal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413740A1 (en) * 1984-04-12 1985-10-17 Oelsch KG, 1000 Berlin Screw terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957738A (en) * 1997-09-23 1999-09-28 Yazaki Corporation Eyelet terminal with retainer

Also Published As

Publication number Publication date
EP0452929A2 (en) 1991-10-23
DE69114752T2 (en) 1996-07-18
IT219489Z2 (en) 1993-03-17
IT9021052V0 (en) 1990-04-23
EP0452929A3 (en) 1992-07-15
ATE130704T1 (en) 1995-12-15
DE69114752D1 (en) 1996-01-04
IT9021052U1 (en) 1991-10-24

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