[go: up one dir, main page]

WO2012055599A1 - Dispositif pour la limitation du couple - Google Patents

Dispositif pour la limitation du couple Download PDF

Info

Publication number
WO2012055599A1
WO2012055599A1 PCT/EP2011/064502 EP2011064502W WO2012055599A1 WO 2012055599 A1 WO2012055599 A1 WO 2012055599A1 EP 2011064502 W EP2011064502 W EP 2011064502W WO 2012055599 A1 WO2012055599 A1 WO 2012055599A1
Authority
WO
WIPO (PCT)
Prior art keywords
torque
head part
threaded part
threaded
receptacle
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.)
Ceased
Application number
PCT/EP2011/064502
Other languages
German (de)
English (en)
Inventor
Andreas Eckstein
Mathias Goldt
Marc Schäffer
Arjen Detmer Dijkhuis
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of WO2012055599A1 publication Critical patent/WO2012055599A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps

Definitions

  • the invention relates to a device for torque limiting, in particular a tear-off nut or tear-off screw, according to the preamble of claim 1.
  • tear-off or tear-off screws with a head part and a threaded part, which are connected to each other via a welded connection.
  • a torque is applied to the head part by means of a fastening tool, wherein the torque is transmitted at the beginning of the fastening operation via the welded connection to the threaded portion. If a predetermined limit torque is reached at the end of the fastening process, the head part shears off the threaded part at the welded joint. By this shearing the maximum acting on the threaded part torque is limited.
  • Tear off nuts are used in particular for connecting metal parts. By contrast, when using such nuts in concrete anchors reliability problems may arise. In particular, it has been observed that the tear-off nut can prematurely break off when used on concrete anchors.
  • the object of the invention is to provide a particularly reliable device for the limited transmission of torque.
  • the object is achieved according to the invention by a device having the features of claim 1. Preferred embodiments are given in the dependent claims.
  • the device according to the invention is characterized in that means are provided for the rotationally coupled transmission of axial forces from the head part to the threaded part.
  • the invention is based on the recognition that the difficulties encountered in the use of prior art breakaway nuts on concrete anchors are due to the hammering action often required when placing concrete anchors.
  • high impact forces act on the headboard.
  • these impact forces but also act on the means for torque transmission. Therefore, the impact forces can damage or at least weaken the means for transmitting torque. This may in particular mean that the means for transmitting torque already break before reaching the limit torque, so that a correct control of the bias voltage when tightening the armature is no longer possible.
  • the invention starts and provides, in addition to the means for transmitting torque, means for rotationally coupled transmission of axial forces from the head part to the threaded part.
  • These means for transmitting axial forces are connected in terms of power in parallel with the means for transmitting torque. They therefore pass on at least part of the axially directed impact forces from the head part on the threaded part and thus relieve the means for transmitting torque in appropriate mass.
  • the means for the transmission of axial forces are provided for dreenktkoppelten power transmission, that is, in contrast to the means for transmitting torque transmitted at most a fraction of the torque acting on the head part on the threaded part.
  • the means for torque transmission are protected from axial forces without substantially changing the torque transmission characteristic of the device.
  • the device according to the invention can therefore also be used, in particular, for concrete anchors in which hammering with corresponding axial forces is frequently required for setting.
  • the rotary handle can, for example, be an external polygon, in particular an external hexagon.
  • the means for the rotationally coupled transmission of axial forces have at least one axial stop arranged on the head part for the threaded part.
  • Such an axial stop can transmit axial forces as soon as the threaded part abuts against it.
  • the axial stop may have an annular stop surface for the threaded portion, wherein the annular stop surface is preferably arranged coaxially to the passage opening of the nut.
  • the threaded part rests against the axial stop already in the axially unloaded state of the device.
  • the means for the rotationally coupled transmission of axial forces already contribute to the transmission of very small axial forces.
  • the threaded portion is spaced from the axial stop in the axially unloaded state.
  • a particularly good rotational decoupling of the head part and threaded part is given because there is a gap between threaded part and stop. The Axialkraftübertragung takes place in this case only when the axial forces are sufficiently high to deform the device so far that the gap between the threaded part and stop is closed.
  • a further preferred embodiment of the invention is that the means for transmitting torque have at least one web which connects the head part and the threaded part.
  • a web can form a predetermined breaking point, which breaks when the limit torque is reached.
  • a plurality of webs are provided, which may be arranged in particular around the longitudinal axis of the device around. With regard to the force symmetry, it is advantageous that the webs are arranged equidistantly.
  • the means for torque transmission can be formed by any type of connection between the head part and the threaded part.
  • the means may be formed by a welded connection.
  • the radial direction may relate in particular to the longitudinal axis of the device.
  • a stop surface may be provided for the transmission of axial forces, which is surrounded in the plan view of webs for transmitting torque.
  • the device comprises a, preferably crown-shaped, holding element, which comprises the head part, the means for transmitting torque and a receptacle for the threaded portion, wherein the means for transmitting torque connect the head portion and the receptacle.
  • the head part, the means for transmitting torque and the receptacle which can receive the threaded part together form a unit, the so-called holding element.
  • the device can thus be formed in two parts in a particularly simple manner.
  • the threaded part is received in the receptacle at least positively.
  • the receptacle can also receive the threaded part frictionally and / or cohesively.
  • the receptacle may have an internal polygon, in particular a hexagon socket, and the threaded part has a corresponding external polygon, in particular hexagon.
  • the device according to the invention can be designed as a tear-off nut. Accordingly, it is preferable that the thread of the thread part is an internal thread.
  • the inventive device can also be designed as a departure screw, in which case the thread of the threaded part is an external thread.
  • Fig. 1 is a side view of an embodiment of an inventive device
  • Fig. 2 is a view of the device of Figure 1 from above. a cross-sectional view A-A 'according to FIG. 2 of the device of FIG. 1;
  • Fig. 4 is a view of the device of Figure 1 from below.
  • Fig. 5 is a view of the device of FIG. 1 from below, wherein in contrast to Fig. 4, the threaded portion is not shown.
  • FIGS. 1 to 5 An exemplary embodiment of a device according to the invention designed as a tear-off nut for torque limiting is shown in FIGS. 1 to 5.
  • the device has a crown-shaped holding element 1, which comprises a head part 10, a foot-side receptacle 60 and at least one web 43.
  • the at least one web 43 connects the head part 10 and the receptacle 60 and thereby forms means 40 for transmitting torque.
  • the head part 10, the at least one web 43 and the receptacle 60 may in particular be integrally formed and / or have a metal material.
  • a receiving opening 63 is formed in the receptacle 60, in which, when the device is assembled, a threaded part 30 designed as a hexagon nut is received in a form-fitting manner with a thread 32 designed as an internal thread.
  • the receiving opening 63 has a hexagon socket, which corresponds to an external hexagon formed as a hexagon threaded part 30.
  • a hexagon instead of a hexagon, another polygonal structure can also be provided. Additionally or alternatively, a non-positive connection may be present.
  • the head part 10 has a rotary engagement means 12 designed as an external hexagon, by means of which a torque can be transmitted form-fittingly to the head part 10 by a setting tool, not shown.
  • a plurality of webs 43 are provided for transmitting torque from the head portion 10 on the receptacle 60 and thus on the threaded portion 30 between the head portion 10 and receptacle 60, wherein in the illustrated embodiment, each web of the rotary control means 12, a web 43 is omitted.
  • a total of six webs 43 are present in the example shown.
  • the threaded part 30 and the head part 10 are arranged coaxially and define a common longitudinal axis 5 of the device.
  • the head part 10 has a through hole 15, which is aligned with the threaded bore 35 of the threaded part 30, so that the device seen in the longitudinal direction (see Fig .. 2) is continuous.
  • the head part 10 has an annular axial stop 51, which permits an axial movement in the receiving opening 63 recorded threaded part 30 is limited relative to the head part 10.
  • the axial stop 51 forms means 50 for the rotationally coupled transmission of axial forces from the head part 10 to the threaded part 30.
  • a torque is exerted on the head part 10 by means of a setting tool via the rotary control means 12.
  • This torque is transmitted via the webs 43 to the receptacle 60 and from the receptacle 60 in turn to the threaded portion 30.
  • the means 50 for rotationally coupled axial force transmission formed as an axial stop 51 do not appreciably participate in the torque transmission.
  • axial forces i. Forces with a component in the direction of the longitudinal axis 5, on the head part 10, for example due to hammer blows on the head part 10, these axial forces are primarily on the axial stop 51, i. the means 50 for torsionally coupled axial force transmission, transmitted to the threaded portion 30.
  • the webs 43 take on the power transmission at most insignificantly, due to frictional forces on the inner wall of the receiving opening 63, part. The webs 43 and thus the means 40 for torque transmission are consequently not significantly affected by axial forces according to the invention.
  • the device therefore acts as a torque limiting Abreissmutter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un dispositif pour la limitation du couple, doté d'une pièce de tête (10), qui présente un moyen d'engagement rotatif (12) pour un outil de pose, une partie filetée (30), présentant au moins un filetage (32), et des moyens (40) pour le transfert du couple de la pièce de tête à la pièce filetée, reliant la pièce de tête à la pièce filetée, les moyens pour le transfert du couple cassant lors d'un couple limite en supprimant la liaison entre la pièce de tête et la pièce filetée. Selon l'invention, des moyens (50) servent au transfert découplé de la rotation de forces axiales de la pièce de tête à la partie filetée.
PCT/EP2011/064502 2010-10-29 2011-08-24 Dispositif pour la limitation du couple Ceased WO2012055599A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043167.2 2010-10-29
DE102010043167A DE102010043167A1 (de) 2010-10-29 2010-10-29 Vorrichtung zur Drehmomentbegrenzung

Publications (1)

Publication Number Publication Date
WO2012055599A1 true WO2012055599A1 (fr) 2012-05-03

Family

ID=44510992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/064502 Ceased WO2012055599A1 (fr) 2010-10-29 2011-08-24 Dispositif pour la limitation du couple

Country Status (2)

Country Link
DE (1) DE102010043167A1 (fr)
WO (1) WO2012055599A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9366282B2 (en) 2013-09-06 2016-06-14 Thomas & Betts International Llc Torque controlling break screw
KR20190099220A (ko) * 2017-01-05 2019-08-26 힐티 악티엔게젤샤프트 3개의 웨브를 구비하는 토크 제한 장치
KR20190102194A (ko) * 2017-01-05 2019-09-03 힐티 악티엔게젤샤프트 큰 개구각을 갖는 파단 표면을 포함하는 파단 너트

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3147079A1 (fr) 2015-09-22 2017-03-29 HILTI Aktiengesellschaft Dispositif de limitation du couple
EP3346147A1 (fr) * 2017-01-05 2018-07-11 HILTI Aktiengesellschaft Limiteur de couple comprenant une pince

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320427A1 (de) * 1983-06-06 1984-12-06 Hilti Ag, Schaan Befestigungselement
FR2598855A1 (fr) * 1986-05-14 1987-11-20 Sicame Sa Embout de vissage adhesif, cassable et jetable, a couple de vissage predetermine.
US4836727A (en) * 1987-06-08 1989-06-06 Volkmann Josef F Torque limited pressed and forged metal nut members
US20020076295A1 (en) 2000-12-14 2002-06-20 Rodney Gibbons Torque limiting device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046052A (en) * 1976-10-14 1977-09-06 Solitron Devices, Inc. Torque limiting RF connector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320427A1 (de) * 1983-06-06 1984-12-06 Hilti Ag, Schaan Befestigungselement
FR2598855A1 (fr) * 1986-05-14 1987-11-20 Sicame Sa Embout de vissage adhesif, cassable et jetable, a couple de vissage predetermine.
US4836727A (en) * 1987-06-08 1989-06-06 Volkmann Josef F Torque limited pressed and forged metal nut members
US20020076295A1 (en) 2000-12-14 2002-06-20 Rodney Gibbons Torque limiting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9366282B2 (en) 2013-09-06 2016-06-14 Thomas & Betts International Llc Torque controlling break screw
KR20190099220A (ko) * 2017-01-05 2019-08-26 힐티 악티엔게젤샤프트 3개의 웨브를 구비하는 토크 제한 장치
KR20190102194A (ko) * 2017-01-05 2019-09-03 힐티 악티엔게젤샤프트 큰 개구각을 갖는 파단 표면을 포함하는 파단 너트
KR102535544B1 (ko) * 2017-01-05 2023-05-22 힐티 악티엔게젤샤프트 큰 개구각을 갖는 파단 표면을 포함하는 파단 너트
KR102536595B1 (ko) * 2017-01-05 2023-05-24 힐티 악티엔게젤샤프트 3개의 웨브를 구비하는 토크 제한 장치

Also Published As

Publication number Publication date
DE102010043167A1 (de) 2012-05-03

Similar Documents

Publication Publication Date Title
DE1119060B (de) Schraubenmutter
EP3565976B1 (fr) Dispositif de limitation de couple comportant trois brides
EP2157323A2 (fr) Boulon
DE102015109278B4 (de) Verbindungssystem, Klemmschraube, Verfahren zum Verbinden zweier Bauteile
EP3565978B1 (fr) Limiteur de couple comprenant une pince
EP3658785B1 (fr) Boulon d'écartement et ensemble de liaison comportant un tel boulon d'écartement
DE2525163A1 (de) Reibahle
WO2012055599A1 (fr) Dispositif pour la limitation du couple
WO2017050725A1 (fr) Dispositif de limitation de couple
EP3565977B1 (fr) Écrou de rupture ayant une surface de rupture à grand angle d'ouverture
DE102008048076A1 (de) Schraubwerkzeug
EP3372343B1 (fr) Dispositif comportant un bras de support déviant le moment de réaction et un tournevis
EP1353080B1 (fr) Elément à limitation de couple intrinsèque pour un goujon expansible
DE102010030051A1 (de) Schraubenmutter und Verfahren zur axialen Sicherung eines Mutterkopfes gegenüber einem Gewindebolzen
EP0940227B1 (fr) Outil pour rivetage d' écrous aveugles
DE10325431A1 (de) Verbindungsanordnung zweier Bauteile mit einem Blindniet und Verfahren zum Vernieten zweier Bauteile
EP2865903A1 (fr) Ancrage expansible avec élément élastique
DE3329104A1 (de) Befestigungselement und verfahren zum anbringen desselben
EP3144105B1 (fr) Procede de retrait d'un element de rivet borgne d'une riveteuse
DE19819251B4 (de) Handnietgerät zum Setzen von Blindnietmuttern
WO2009135859A1 (fr) Dispositif essuie-glace
DE3525947C1 (en) Screw and threaded bolt securing device
WO2012049079A1 (fr) Dispositif de transmission de couple de rotation en particulier sous la forme d'un mandrin de serrage pour mèches
DE202018006381U1 (de) Vorrichtung zum Entfernen einer festsitzenden Schraube
EP2754534A2 (fr) Tige de torsion

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11748647

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11748647

Country of ref document: EP

Kind code of ref document: A1