EP2676040A2 - Dispositif d'application de force - Google Patents

Dispositif d'application de force

Info

Publication number
EP2676040A2
EP2676040A2 EP12737119.3A EP12737119A EP2676040A2 EP 2676040 A2 EP2676040 A2 EP 2676040A2 EP 12737119 A EP12737119 A EP 12737119A EP 2676040 A2 EP2676040 A2 EP 2676040A2
Authority
EP
European Patent Office
Prior art keywords
contour
better
force
force attack
radius
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.)
Withdrawn
Application number
EP12737119.3A
Other languages
German (de)
English (en)
Inventor
Stephan Esper
Robert Bongartz
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.)
Ruia Global Fasteners AG
Original Assignee
Ruia Global Fasteners 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 Ruia Global Fasteners AG filed Critical Ruia Global Fasteners AG
Publication of EP2676040A2 publication Critical patent/EP2676040A2/fr
Withdrawn legal-status Critical Current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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
    • 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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/003—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool star-shaped or multi-lobular, e.g. Torx-type, twelve-point star

Definitions

  • the present invention relates to a rotationally symmetrical, star-shaped force application, preferably for rotatable connection elements such as screws and the associated actuating tools.
  • the normal force arising at the contact point that is, the force acting perpendicular to the contact surface, passes through the outwardly projecting corner, for example, of a hexagon screw, and thus acts on this corner as an undesired shearing force, which can lead to premature failure of this drive.
  • Object of the present invention is therefore to provide a force application, in particular on a connecting element such as a screw, which can be operated with all these tools, so (of course) with the fitting for the inventive force attack, in particular analogously designed tool, but also with a matching only in the size of hexagonal tool and also with only a matching in the size "Torx ®” tool, or a “Torx Plus ®” tool, and in which in particular to minimize the shear forces at the force application areas is achieved.
  • a connecting element such as a screw
  • a tool is to be created, with which one can operate corresponding force attacks of all kinds, so both hexagonal, and Torx ® and Torx Plus ® force attacks alike, without having to change the tool every time or even another
  • this aspect is not in the foreground.
  • the drive system according to the invention should be usable both as an internal force and as an external force attack, and in both cases have the compatibility described above for hexagonal, hexalobular and flattened hexalobular force attacks.
  • the force application according to the invention should at least meet, if not exceed, the existing requirements for service life, power transmission and weight reduction, as they are used to the hexalobular and flattened hexalobular drives among users, and at the same time offer the possibility of maintenance or repair to be operated without loss of durability with common tools available on the market.
  • this object is achieved by a rotationally symmetrical star-shaped force attack, in which the individual arms of the star are formed as pointed arches, and in particular the design of the radii of the pointed arches is selected so that the shear forces are minimized at the force application areas.
  • this object of the invention can be achieved by a rotationally symmetrical force attack, in which the contour of the force attack is formed of individual, merging into each other radii whose centers are equally spaced on an inner circle about the axis of rotation of the force application.
  • the pointed arches are bounded by radii whose centers lie on an inner circle about the axis of rotation of the force application.
  • the force application according to the invention has six arms, each bounded by two radii extending from six centers on an inner circle about the axis of rotation of the force application, and respectively 60 ° so that the left boundary of an arm is formed by the same radius as the right boundary of a right adjacent , in particular immediately adjacent right arm, and the right boundary of an arm is formed by the same radius as the left Limitation of a left adjacent arm.
  • the present invention may be applied to any number of force application edges, e.g. four, eight, ten or twelve Force attacks, or other rotationally symmetric force attacks are transmitted. However, these are not so common in the market.
  • a counterpart associated with the contour according to the invention has a counter-contour adapted in accordance with the invention such that the radii of the flanks of the contour and counter-contour come into contact with one another in that a planar contact surface is created.
  • the drive types common on the market offer only a linear contact surface, which leads to increased wear and thus lower service life.
  • a surface-shaped system can only be achieved by all the radii and the pitch circle diameter are specially adapted to each other.
  • the radii of the pointed arches and the inner circle are chosen such that a normal force acting on the arcing extends from each point of the arcing during an external attack of the force into the solid core of the contour radially inward of the inner transition radii, shear forces will thereby be applied to the arms avoided the star-shaped contour and increases the life.
  • the force attack can be further improved by further measures:
  • the diameter of the inner circle (14) is between 40% and 45%, better between 42% and 43%, better between 42.6% and 42.7% of the diameter of the outer circle (22),
  • the outer transition radius (R a ) is between 3.5% and 6.5%, better between 4.35% and 5.6% of the edge radius (116)
  • the diameter of the inner circle (114) is between 36% and 41%, better between 38% and 39.5%, better between 38.7% and 38.8% of the diameter of the outer circle (122),
  • the diameter of the inner circle (14) is between 36% and 42%, better between 37% and 41%, better between 37.9% and 40.0% of the diameter of the outer circle (22),
  • the outer transition radius (R a ) between 6.5% and 10.0%, more preferably between 7.5% and 9.0% of the edge radius (116)
  • the diameter of the inner circle (114) is between 40% and 45%, better between 41% and 44%, better between 42% and 43% of the diameter of the outer circle (122),
  • the force attack can be further improved by further measures in conjunction with a known inner or outer hexagon:
  • flank radius 16 is a size of 2.55 times to 2.85 times, more preferably 2.65 times to 2.75 times,
  • the inner circle 14 has a size of 4.1 times to 4.3 times, more preferably 4.15 times to 4.25 times,
  • the intermediate circuit 21 has a size of 2.15 to 2.45 times, more preferably 2.25 to 2.35 times,
  • the outer circle 22 a size of 1.65 times to 1.95 times, better of 1.75 times to 1.85 times
  • flank radius 116 has a size of 2.05-fold to 2.35-fold, more preferably 2.15-fold to 2.25-fold,
  • the inner circle 114 has a size of 3.75 to 4.05 times, more preferably 3.85 times to 3.95 times
  • the DC link 121 has a size of 1.75 times to 2.05 times, more preferably 1.85 times to 1.95 times,
  • the outer circle 122 has a size of 1.35-fold to 1.65-fold, more preferably 1.45-fold to 1.55-fold
  • Fig. 1 shows the basic form of a six-symmetrical force application according to the invention, which is suitable both as an external and as an internal force attack;
  • FIG. 2 shows the interaction of an outer contour according to the invention with a hexagonal inner contour
  • FIG. 3 shows the interaction of an outer contour according to the invention with a hexalobular inner contour
  • Fig. 5 shows the geometric construction including dimensioning of an outer contour according to the invention (for example bit);
  • Fig. 6 shows the same construction for an optimized inner contour (e.g., nut) according to the present invention.
  • Fig. 1 shows the basic principle of the drive according to the invention based on a six-axis rotationally symmetrical force application. It should be noted that the contour shown for the force attack can either serve as mecanickraftangriff (then the areas within the contour are excluded) or as an external force attack (then the contour limits the inside of the head of the connecting element).
  • Figures 2 to 4 show the interaction of an outer contour, so for example a bit or a screw head, according to the present invention, with the various conventional in the prior art inner contours, such as are commercially available as tools or fasteners.
  • the exact geometric construction for deriving the contour of FIG. 1 will be explained below with reference to the more detailed Figures 5 and 6.
  • Fig. 2 shows the interaction of an outer contour according to the invention with a solid drawn Hexagonal inner contour of the width W, so for example a normal, available in each workshop hexagon socket.
  • a screw or nut provided with an external force attack according to the invention can thus be actuated, as shown here, with a normal hexagonal tool of width W.
  • FIG. 2 shows the interaction of an inner contour according to the invention with a hexagonal outer contour of width B shown in dashed lines, that is to say, for example, a normal external hexagon screw head available in every workshop.
  • the force transmission does not occur as in the interaction of a hexagonal external force attack with a corresponding hexagonal tool only as a linear force attack on the edge of the external force attack, but according to the invention a tangential force attack over the radius, so that there is a much larger force application surface and the forces are distributed much better, whereby damage to the cooperating force attacks can be expected only at much higher forces than would be expected in the interaction of two hexagonal force attacks according to the prior art.
  • Fig. 3 shows the interaction of the same outer contour according to the invention, that is, for example, a corresponding screw head with a hexalobulcic nut, as sold for example by the applicant under the trade name "Torx ® ".
  • the force application according to the invention results in a force transmission which is tangential to radii which is too large in each case and thus in a two-dimensional force transmission.
  • FIG. 4 shows the combination of the same outer contour according to the invention with a hexalobular-flattened inner contour as sold by the Applicant under the name "Torx Plus® ".
  • Torx Plus® a hexalobular-flattened inner contour
  • FIGS. 2 to 4 it can be shown with reference to FIGS. 2 to 4, as well as in principle an outer contour according to the invention by means of all tools available on the market (inner contours), namely hexagon, hexalobular and flattened hexalobulär, can be operated.
  • Fig. 5 shows in this respect the geometric construction for an outer contour 12, that is, for example, a bit.
  • dimensions are also given here, which, of course, relate only to the example shown.
  • the solution according to the invention can also be made arbitrarily smaller or larger.
  • the construction of the contour according to the invention is carried out for e.g. an external force attack 12 on the basis of an axis of rotation 10 of the force application 12 concentric inner circle 14.
  • On the inner circle 14 are evenly spaced, that is, at intervals of 60 degrees angle, the centers of the six other circles attached, whose partial arcs form the outer contour 12.
  • the circle 16 is drawn in the upper right. Of the other circles, only the centers are indicated by crosses on the concentric inner circle 14.
  • the illustrated outer contour 12 has, due to this geometric construction, a star-shaped configuration with six arms 18 each spaced apart by 60 °. These arms 18 have an ogival shape formed by the respective outer radii 20 having two adjacent arms 18 each being formed by the circular arc portion of the same circle 16 whose center is located between the two arms 18.
  • FIG. 6 shows the counterpart 112 to the outer contour 12 of FIG. 5, that is to say an inner contour 112 according to the invention adapted to the outer contour 12 of FIG. 5, which is suitable both for driving through a bit according to FIG. 5 and for corresponding hexagonal , hexalobular or flattened - hexalobular outer contours.
  • the dimensioning is given, which results when the inner contour 112 should be optimally adapted to the outer contour 12 of FIG. 5 according to the invention.
  • inventive inner contours can be made in any size.
  • the construction of the inner contour 112 according to the invention follows the same rules and structures as in the case of the external force attack 12 according to the invention of FIG. 5.
  • an axis of rotation 110 is provided for the inner contour 112, around which a concentric inner circle 114 is pulled.
  • the centers of the six other circles 116 are mounted, whose partial arcs form the inner contour 112.
  • the inner contour 112 according to the invention shown in FIG. 6 thus likewise has a star-shaped configuration with six arms 118 each spaced apart by 60 °.
  • These arms 118 also have an ogival shape formed by the respective outer radii 120 having two adjacent arms 118 each formed by the circular arc portion of the circle 116, the center of which is located between the two arms 118.
  • the left boundary of an arm 118 is formed by the same radius 120 as the right boundary of a right adjacent arm 118 and the right boundary of an arm is formed by the same radius as the left boundary of a left adjacent arm.
  • the inner circles 14; 114 on which the centers of the circles 20, 120 are arranged, in contrast, are almost equal.
  • a universal drive is provided whose contour consists of individual, merging into each other radii, which rotate in an offset pitch circle at a distance of 60 ° about the axis of rotation of the drive.
  • the intersections of the radii are preferably rounded with a tangential adjacent radius to each other.
  • the associated counterpart 112 has a mating contour adapted in the form, so that the radii of the flanks come into contact with one another in such a way that a plane-shaped attack surface always arises.
  • the drive according to the invention is designed in its geometric shape of the radii such that all the drives provided for this purpose (hexagonal, Allen®, Torx®, Torx Plus®) are always offered the optimum attack surface. This prevents increased wear and ensures optimum power transmission. This ideal power transmission is given both when loosening and re-tightening.
  • the present invention is suitable for both external and internal drive.
  • the flanks are symmetrical to each other in the tightening and loosening directions.
  • the drive according to the invention thus has six specially designed flanks, which enable it to be driven not only with the tool provided for it, but also in case of need, in addition to all common on the market drives (Torx ® , Torx Plus ® and hexagon) and again to be screwed.
  • flank structure according to the invention since the geometric shape of the radii according to the invention provides for a low surface pressure.
  • Actuator and bit are geometrically coordinated so that it comes with application of force through the bit to a surface-shaped support surface (the classic hex drive, for example, provides only a linear support surface by its geometric shape).
  • the classic hex drive for example, provides only a linear support surface by its geometric shape.
  • flanks are designed according to the invention geometrically such that they always provide an optimal attack surface for the replacement drives (hexagonal, hexalobular and flattened-hexalobulär).
  • the force application surfaces lie flat on the radii contour.
  • the geometric design of the invention is therefore optimally adapted for all systems. The power transmission is not done by tilting the bit on the drive, as this would lead to increased wear.
  • tangents ti, ta, Ti, Ta are shown once at the innermost and once at the outermost end of the circular segment-shaped flanks of some arms.
  • the inner tangent angle ⁇ 2 or ⁇ 2 is the angle which the tangent ti, Ti applied to the innermost end of a flank occupies with a radially extending line passing through the inner meeting point of two adjacent flanks which lies on the intermediate circle 21 or 121 , includes.
  • these are the angles which result if the circular segment-shaped flanks of the arms without transition radius, that is pointed, would merge into one another.
  • the outer tangent angle ⁇ 1 or ⁇ 1 is analogously the same angle at a tangent ta, Ta applied at the extreme end of a flank.
  • the respective angles are different for an outer contour and an inner contour, and additionally different, depending on whether it is an external force attack or an internal force attack with respect to the connecting element.
  • the flank radius 16 has a size of 7.432 mm
  • the inner circle 14 has a size of 4.741 mm
  • the intermediate circuit 21 has a size of 8.706 mm
  • the outer circle 22 has a size of 11.114 mm
  • the flank radius 116 has a size of 8.405 mm
  • the inner circle 114 has a size of 3.578 mm
  • the intermediate circuit 121 has a size of 7.460 mm
  • the outer circle 122 has a size of 9.199 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Earth Drilling (AREA)
  • Pens And Brushes (AREA)
  • Prostheses (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Rotary Pumps (AREA)
  • User Interface Of Digital Computer (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Golf Clubs (AREA)
  • Surgical Instruments (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

Dispositif d'application de force (12, 112) à symétrie de révolution, présentant un contour extérieur ou intérieur en forme d'étoile vu axialement, destiné de préférence à des éléments d'assemblage, les branches individuelles (18, 118) de l'étoile présentant la forme d'un arc brisé dont les pointes extérieures sont situées sur un cercle extérieur commun. Selon l'invention, une pièce homologue, notamment un embout de vissage, une douille ou une tête de vis, correspondant au contour du dispositif d'application de force (12, 112) présente un contour homologue adapté de sorte que les rayons (20, 120) des flancs du dispositif d'application de force (12, 112) et la pièce homologue viennent en butée l'un contre l'autre de façon à créer une surface de pression plane. Dans le cas où notamment le contour et le contour homologue correspondent à la forme du dispositif d'application de force selon l'invention, l'adaptation du contour et du contour homologue est provoquée par le fait que les rayons (20) du contour extérieur (12) sont sélectionnés de façon à être inférieurs à ceux du contour intérieur correspondant (112) de 4% à 12%, de préférence de 6% à 10%, ou mieux encore d'environ 8% à 10%, tandis que, pour le contour et le contour homologue, les cercles intérieurs (14; 114), sur lesquels les centres des rayons (20; 120) sont disposés autour de l'axe de rotation (10; 110) du dispositif d'application de force (12; 112), présentent pratiquement le même diamètre, le diamètre du cercle intérieur notamment dans le cas du contour extérieur étant supérieur de 4% à 6%, en particulier de 5%, au diamètre du cercle intérieur du contour intérieur correspondant.
EP12737119.3A 2011-01-13 2012-01-10 Dispositif d'application de force Withdrawn EP2676040A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202011001423U DE202011001423U1 (de) 2011-01-13 2011-01-13 Kraftangriff
PCT/DE2012/200000 WO2012097810A2 (fr) 2011-01-13 2012-01-10 Dispositif d'application de force

Publications (1)

Publication Number Publication Date
EP2676040A2 true EP2676040A2 (fr) 2013-12-25

Family

ID=43972874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12737119.3A Withdrawn EP2676040A2 (fr) 2011-01-13 2012-01-10 Dispositif d'application de force

Country Status (11)

Country Link
US (1) US9302375B2 (fr)
EP (1) EP2676040A2 (fr)
JP (1) JP2014507610A (fr)
KR (1) KR20140038363A (fr)
CN (1) CN103314222B (fr)
AU (1) AU2012208824B2 (fr)
BR (1) BR112013016500A2 (fr)
CA (1) CA2838886A1 (fr)
DE (1) DE202011001423U1 (fr)
TW (1) TW201241330A (fr)
WO (1) WO2012097810A2 (fr)

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Publication number Priority date Publication date Assignee Title
US10697499B2 (en) * 2015-03-19 2020-06-30 Acument Intellectual Properties, Llc Drive system with full surface drive contact
JP6118852B2 (ja) * 2015-08-06 2017-04-19 株式会社九飛勢螺 ねじ
DE102016123318B4 (de) * 2016-12-02 2019-12-05 Kamax Holding Gmbh & Co. Kg Hochfeste Leichtbauschraube mit Doppelkonturangriff sowie Umformverfahren und Umformwerkzeug zum Herstellen sowie Betätigungswerkzeug zum Betätigen einer solchen Schraube
CN112352112B (zh) * 2018-06-15 2022-07-01 N·邦加茨 以旋转固定的方式连接两个部件的方法
USD888526S1 (en) 2018-09-04 2020-06-30 Snap-On Incorporated Hex driver
US10960520B2 (en) * 2018-09-04 2021-03-30 Snap-On Incorporated Hex driver
TWI782770B (zh) * 2021-10-28 2022-11-01 寬仕工業股份有限公司 緊固件、起子頭及成型沖具
USD1057609S1 (en) * 2024-10-09 2025-01-14 Ningbo Sanlishin Auto Parts Co., Ltd Spacer

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US3908488A (en) * 1973-10-01 1975-09-30 Alfred Frederick Andersen Minimum stressed wrench
US4338835A (en) * 1980-01-24 1982-07-13 Leon Simons Recessed head fastener and driver therefor
DE3206494A1 (de) * 1982-02-24 1983-09-08 Rappold, Manfred, Dr., 7117 Bretzfeld Kopf- und schluesselausbildung fuer eine schraube
DE4124472A1 (de) * 1991-07-24 1993-01-28 Adolf Wuerth Gmbh & Co Kg Schraube
US5207132A (en) * 1991-10-16 1993-05-04 Textron Inc. Elliptical lobed drive system
US6655888B2 (en) * 2002-01-16 2003-12-02 Hi-Shear Corporation Lobed drive for hi-lite fastener
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AU2009239472B2 (en) * 2008-04-21 2013-05-23 Asia Fastening (Us), Inc. Drive system
US8291795B2 (en) * 2010-03-02 2012-10-23 Phillips Screw Company Fastener system with stable engagement and stick fit

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Also Published As

Publication number Publication date
CA2838886A1 (fr) 2012-07-26
TW201241330A (en) 2012-10-16
WO2012097810A3 (fr) 2012-11-22
KR20140038363A (ko) 2014-03-28
DE202011001423U1 (de) 2011-05-05
CN103314222B (zh) 2014-12-10
US20140007746A1 (en) 2014-01-09
AU2012208824A1 (en) 2013-05-02
AU2012208824B2 (en) 2015-06-11
JP2014507610A (ja) 2014-03-27
US9302375B2 (en) 2016-04-05
CN103314222A (zh) 2013-09-18
BR112013016500A2 (pt) 2016-09-27
HK1184520A1 (en) 2014-01-24
WO2012097810A2 (fr) 2012-07-26

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