FR2760495A1 - Nut and stud fastening for two components - Google Patents
Nut and stud fastening for two components Download PDFInfo
- Publication number
- FR2760495A1 FR2760495A1 FR9702691A FR9702691A FR2760495A1 FR 2760495 A1 FR2760495 A1 FR 2760495A1 FR 9702691 A FR9702691 A FR 9702691A FR 9702691 A FR9702691 A FR 9702691A FR 2760495 A1 FR2760495 A1 FR 2760495A1
- Authority
- FR
- France
- Prior art keywords
- nut
- torque
- cover
- nut body
- allowing
- 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
Links
- 230000001681 protective effect Effects 0.000 claims description 3
- 210000000056 organ Anatomy 0.000 claims 1
- 238000012795 verification Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
La présente invention concerne un dispositif de fixation d'une pièce sur une autre, à l'aide d'un écrou coopérant avec un goujon fixé sur l'une des deux pièces et comportant des moyens d'application à l'écrou d'un couple assurant son vissage sur le goujon. The present invention relates to a device for fixing a piece on another, using a nut cooperating with a stud fixed on one of the two pieces and comprising means for applying the nut of a couple ensuring its screwing on the stud.
On sait que dans tous les assemblages vissés de ce type, la certitude d'un serrage correct est fondamentale pour garantir la pérennité de l'assemblage et donc de la ou des fonctions associées. We know that in all screwed assemblies of this type, the certainty of correct tightening is fundamental to guarantee the durability of the assembly and therefore of the associated function (s).
Il est connu d'utiliser, pour obtenir cette certitude, soit des moyens liés au processus de vissage, tels que des clés dynamométriques avec ou sans contrôle et repère de vérification comme par exemple une touche de peinture sur l'assemblage contrôlé, ou encore des clés à serrage automatique contrôlées par ordinateur lorsqu'il y a plusieurs assemblages à serrer sur un même poste de travail, soit des moyens liés au produit, tels que des vis d'assemblage avec zone de rupture calibrée pour interdire le serrage excessif ou pour interdire un démontage ultérieur de l'assemblage. It is known to use, to obtain this certainty, either means related to the tightening process, such as torque wrenches with or without control and verification mark such as for example a touch of paint on the controlled assembly, or computer-controlled self-tightening wrenches when there are several assemblies to be tightened on the same workstation, i.e. means linked to the product, such as assembly screws with calibrated rupture zone to prevent excessive tightening or to prohibit subsequent disassembly of the assembly.
La vérification basée sur ces types de moyens n'est pas satisfaisante. En effet, la vérification liée au processus de vissage présente l'inconvénient d'être coûteuse en raison du temps nécessaire pour serrer et contrôler le couple ou encore en raison des investissements à mettre en oeuvre. Concernant la vérification à l'aide de moyens intégrés au produit, l'assemblage ne comporte pas toujours de vis permettant une telle vérification. Verification based on these types of means is not satisfactory. Indeed, the verification linked to the screwing process has the disadvantage of being costly because of the time necessary to tighten and control the torque or also because of the investments to be implemented. Regarding verification using means integrated into the product, the assembly does not always include screws allowing such verification.
L'invention a pour but de proposer un dispositif de fixation, du type défini plus haut, qui assure la certitude d'un serrage correct tout en étant peu coûteux et aisé à mettre en oeuvre. The invention aims to provide a fixing device, of the type defined above, which ensures the certainty of correct tightening while being inexpensive and easy to implement.
Pour atteindre ce but, le dispositif de fixation selon l'invention est caractérisé en ce que l'écrou comprend un corps d'écrou destiné à serrer la pièce à fixer sur l'autre pièce et une partie constituant le moyen d'application du couple et reliée au corps d'écrou par une zone de rupture calibrée adaptée pour se rompre lorsque le couple atteint une valeur prédéterminée. To achieve this object, the fixing device according to the invention is characterized in that the nut comprises a nut body intended to tighten the part to be fixed on the other part and a part constituting the means for applying the torque. and connected to the nut body by a calibrated rupture zone adapted to rupture when the torque reaches a predetermined value.
Selon une caractéristique de l'invention, le corps de l'écrou présente une forme permettant de le saisir à l'aide d'une clé de serrage, cette forme constituant un moyen de démontage du dispositif. According to a characteristic of the invention, the body of the nut has a shape allowing it to be grasped using a tightening key, this shape constituting a means of dismantling the device.
Selon une autre caractéristique de l'invention, le dispositif de fixation comporte un organe tel qu'un capot protecteur, susceptible d'être monté sur le corps de l'écrou et des moyens permettant la mise en place de l'organe seulement si le couple correct a été appliqué à l'écrou. According to another characteristic of the invention, the fixing device comprises a member such as a protective cover, capable of being mounted on the body of the nut and means allowing the establishment of the member only if the correct torque has been applied to the nut.
L'invention sera mieux comprise et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence à la figure unique schématique annexée donnée uniquement à titre d'exemple illustrant un mode de réalisation de l'invention. The invention will be better understood and other objects, characteristics, details and advantages thereof will appear more clearly during the explanatory description which follows, made with reference to the single appended schematic figure given solely by way of example illustrating an embodiment of the invention.
Comme le montre la figure unique, le dispositif de fixation 1 selon l'invention est utilisé, dans l'exemple représenté, pour assembler une cosse de masse 2 à laquelle est relié un fil conducteur 3 à un support conducteur 4. As shown in the single figure, the fixing device 1 according to the invention is used, in the example shown, to assemble a ground terminal 2 to which a conductive wire 3 is connected to a conductive support 4.
Le dispositif de fixation 1 comprend un goujon 6 de retenue de la cosse 2 fixé sur le support 4 et un écrou 7 destiné à serrer la cosse 2 contre le support 4. L'écrou 7 comporte un corps d'écrou 8 à six pans (non représentés) de taille normalisée par rapport au goujon 6 et une partie 9 liée au corps d'écrou 8 par une zone de striction calibrée 10. La partie 9 comprend une collerette circulaire 11 et sur celle-ci un élément 12 qui présente la forme classique à six pans d'un écrou et est adapté pour recevoir la douille d'un outil de serrage. La zone de striction 10 est dimensionnée de façon à se rompre lorsque le couple appliqué à l'élément d'écrou 12 atteint une valeur prédéterminée. Comme le montre la figure, la cosse 2 est enserrée entre la face frontale libre du corps d'écrou 8 et le support 4. The fixing device 1 comprises a stud 6 for retaining the terminal 2 fixed on the support 4 and a nut 7 intended to tighten the terminal 2 against the support 4. The nut 7 comprises a nut body 8 with hexagon ( not shown) of standard size with respect to the stud 6 and a part 9 linked to the nut body 8 by a calibrated necking zone 10. The part 9 comprises a circular flange 11 and on this element an element 12 which has the shape classic hexagon with a nut and is suitable for receiving the socket of a clamping tool. The necking zone 10 is dimensioned so as to break when the torque applied to the nut element 12 reaches a predetermined value. As shown in the figure, the terminal 2 is clamped between the free front face of the nut body 8 and the support 4.
Le dispositif de fixation 1 comporte en outre un capot 14 de protection de l'assemblage qui ne peut être fixé sur le corps d'écrou 8 que lorsque l'écrou 7 est correctement serré sur le goujon. A cette fin, le corps d'écrou 8 comporte, près de la zone de striction 10, une gorge annulaire 15 dans laquelle peut s'engager le bord d'un évidement circulaire 16 pratiqué dans la paroi supérieure du capot 14. Ce bord circulaire s'encastre dans la gorge 15 lors de la mise en place du capot 14 sur le corps d'écrou 8 dont la face frontale supérieure 18 délimitant la zone de striction 10 présente à cette fin un profil conique incliné en direction de la gorge 15. The fixing device 1 also comprises a cover 14 for protecting the assembly which can only be fixed to the nut body 8 when the nut 7 is correctly tightened on the stud. To this end, the nut body 8 comprises, near the necking zone 10, an annular groove 15 in which can engage the edge of a circular recess 16 formed in the upper wall of the cover 14. This circular edge fits into the groove 15 when the cover 14 is put in place on the nut body 8, the upper front face 18 delimiting the necking zone 10 for this purpose has a conical profile inclined in the direction of the groove 15.
I1 est important de souligner que le diamètre de la collerette 11 est supérieur au diamètre du corps d'écrou 8. It is important to emphasize that the diameter of the collar 11 is greater than the diameter of the nut body 8.
Ainsi, le capot 14 ne peut être placé sur le corps d'écrou 8 qu'après la rupture de la partie d'écrou 9 à laquelle appartient la collerette 11. Pour complèter la description du capot, on constate que le bord libre de la paroi latérale 19 du capot est en appui sur le support 4 lorsque le capot est placé sur le corps d'écrou 8, le fil 3 passant à travers une ouverture appropriée 20 découpée dans la paroi latérale.Thus, the cover 14 can only be placed on the nut body 8 after the rupture of the nut part 9 to which the flange 11 belongs. To complete the description of the cover, it can be seen that the free edge of the side wall 19 of the cover is supported on the support 4 when the cover is placed on the nut body 8, the wire 3 passing through a suitable opening 20 cut in the side wall.
On décrira ci-après le fonctionnement du dispositif de fixation selon l'invention qui vient d'être décrit. The operation of the fixing device according to the invention which has just been described will be described below.
Après avoir mis en place la cosse 2 sur le support 4 en l'enfilant sur le goujon 6, l'opérateur visse l'écrou 7 sur ce dernier, à l'aide d'un outil de serrage approprié dont la douille est positionnée sur l'élément d'écrou 12. I1 est à noter que la douille présente un calibre supérieur à celui standardisé pour le goujon. En effet, cela permet d'obtenir la certitude de dépasser le couple de rupture de la zone 10 lorsqu'on utilise une serreuse ayant un couple de déclenchement asservi au diamètre de la douille. L'opérateur serre alors l'écrou 7 jusqu'à provoquer la rupture de celuici au droit de la zone de striction 10. Puis, il met en place le capot de protection 14 sur le corps d'écrou 8 qui demeure sur le goujon après la rupture de la zone 10, par engagement du bord 16 de l'évidement dans la gorge 15 du corps d'écrou 8, le capot étant immobilisé en rotation par l'ouverture 20 se situant à cheval sur le fil 3. After installing the terminal 2 on the support 4 by threading it on the stud 6, the operator screws the nut 7 on the latter, using an appropriate tightening tool, the socket of which is positioned on the nut element 12. I1 should be noted that the socket has a larger gauge than that standardized for the stud. In fact, this makes it possible to obtain the certainty of exceeding the breaking torque of zone 10 when a clamp is used having a triggering torque controlled by the diameter of the socket. The operator then tightens the nut 7 until causing it to rupture at the level of the necking zone 10. Then, he sets up the protective cover 14 on the nut body 8 which remains on the stud after the rupture of the zone 10, by engagement of the edge 16 of the recess in the groove 15 of the nut body 8, the cover being immobilized in rotation by the opening 20 lying astride the wire 3.
Si l'opérateur oublie de serrer l'écrou, la partie supérieure 9 de celui-ci ne se rompra pas et il ne pourra donc pas glisser le capot sur l'écrou à cause du diamètre trop grand de la collerette 11 par rapport à l'évidement 16. If the operator forgets to tighten the nut, the upper part 9 of the latter will not break and he will therefore not be able to slide the cover over the nut because of the too large diameter of the flange 11 relative to the '' recess 16.
L'absence du capot sera détectée sûrement en fin de ligne d'assemblage et le montage pourra être repris. I1 est à noter que, pour détecter sûrement et aisément si le serrage est correct, la hauteur totale de l'écrou 7 non serré est nettement supérieure à celle du corps d'écrou 8.The absence of the cover will surely be detected at the end of the assembly line and assembly can be resumed. It should be noted that, to surely and easily detect whether the tightening is correct, the total height of the loose nut 7 is significantly greater than that of the nut body 8.
Bien entendu, le capot 14 pourrait être remplacé par tout autre pièce à proximité de l'écrou 7 à la condition que le montage de celle-ci sur le corps d'écrou 8 ne soit possible qu'après la rupture de la zone de striction 10. Of course, the cover 14 could be replaced by any other part close to the nut 7 on condition that the mounting of the latter on the nut body 8 is only possible after the necking zone has broken 10.
I1 ressort de la description qui vient d'être faite du dispositif de fixation selon l'invention que ce dispositif permet un serrage avec des outils habituels jusqu'à une valeur de couple de serrage prédéterminée, sans la dépasser, tout en permettant un contrôle visuel. I1 emerges from the description which has just been made of the fixing device according to the invention that this device allows tightening with usual tools up to a predetermined torque value, without exceeding it, while allowing a visual control. .
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9702691A FR2760495B1 (en) | 1997-03-06 | 1997-03-06 | DEVICE FOR FIXING ONE PART TO ANOTHER, OF THE NUT AND STUD TYPE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9702691A FR2760495B1 (en) | 1997-03-06 | 1997-03-06 | DEVICE FOR FIXING ONE PART TO ANOTHER, OF THE NUT AND STUD TYPE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2760495A1 true FR2760495A1 (en) | 1998-09-11 |
| FR2760495B1 FR2760495B1 (en) | 1999-05-28 |
Family
ID=9504494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9702691A Expired - Fee Related FR2760495B1 (en) | 1997-03-06 | 1997-03-06 | DEVICE FOR FIXING ONE PART TO ANOTHER, OF THE NUT AND STUD TYPE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2760495B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7334307B1 (en) | 2006-05-23 | 2008-02-26 | Tomasz K Helenowski | Disposable set screw system |
| FR2918806A1 (en) * | 2007-07-10 | 2009-01-16 | Peugeot Citroen Automobiles Sa | Electrical connection and mechanical coupling device for e.g. programmed clamping screw, in motor vehicle, has head comprising part gripped with standard tool, part breakable by torque, and fins folded on ring that hooks screw on lug |
| WO2010100349A1 (en) * | 2009-03-05 | 2010-09-10 | Valeo Etudes Elecroniques | Electric module for an automobile, and corresponding electric device |
| US11193522B2 (en) | 2016-11-30 | 2021-12-07 | 3M Innovative Properties Company | Shear bolt |
| CN114227611A (en) * | 2021-12-10 | 2022-03-25 | 深圳供电局有限公司 | Insulating bolt fastening tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742583A (en) * | 1972-01-14 | 1973-07-03 | Standard Pressed Steel Co | Method of using twist-off nut to assemble a joint |
| DE2353751A1 (en) * | 1973-10-26 | 1975-05-07 | Andreas Revesz | Non removable fixture of screw bolts or nuts - has auxiliary screw for parting off after installation |
| GB2068653A (en) * | 1980-01-23 | 1981-08-12 | Fahrleitungsbau Gmbh | Connection means between an electrical cable and a conductor rail serving mobile consumers |
| US5054980A (en) * | 1990-09-28 | 1991-10-08 | Trw Inc. | Composite weldable stud and method of using same |
-
1997
- 1997-03-06 FR FR9702691A patent/FR2760495B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742583A (en) * | 1972-01-14 | 1973-07-03 | Standard Pressed Steel Co | Method of using twist-off nut to assemble a joint |
| DE2353751A1 (en) * | 1973-10-26 | 1975-05-07 | Andreas Revesz | Non removable fixture of screw bolts or nuts - has auxiliary screw for parting off after installation |
| GB2068653A (en) * | 1980-01-23 | 1981-08-12 | Fahrleitungsbau Gmbh | Connection means between an electrical cable and a conductor rail serving mobile consumers |
| US5054980A (en) * | 1990-09-28 | 1991-10-08 | Trw Inc. | Composite weldable stud and method of using same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7334307B1 (en) | 2006-05-23 | 2008-02-26 | Tomasz K Helenowski | Disposable set screw system |
| FR2918806A1 (en) * | 2007-07-10 | 2009-01-16 | Peugeot Citroen Automobiles Sa | Electrical connection and mechanical coupling device for e.g. programmed clamping screw, in motor vehicle, has head comprising part gripped with standard tool, part breakable by torque, and fins folded on ring that hooks screw on lug |
| WO2010100349A1 (en) * | 2009-03-05 | 2010-09-10 | Valeo Etudes Elecroniques | Electric module for an automobile, and corresponding electric device |
| FR2942917A1 (en) * | 2009-03-05 | 2010-09-10 | Valeo Etudes Electroniques | ELECTRICAL MODULE OF A MOTOR VEHICLE AND CORRESPONDING ELECTRICAL DEVICE |
| US11193522B2 (en) | 2016-11-30 | 2021-12-07 | 3M Innovative Properties Company | Shear bolt |
| CN114227611A (en) * | 2021-12-10 | 2022-03-25 | 深圳供电局有限公司 | Insulating bolt fastening tool |
| CN114227611B (en) * | 2021-12-10 | 2023-06-27 | 深圳供电局有限公司 | Insulating bolt fastening tool |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2760495B1 (en) | 1999-05-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |