EP1910063A1 - Element de fixation a inserer dans un alesage - Google Patents

Element de fixation a inserer dans un alesage

Info

Publication number
EP1910063A1
EP1910063A1 EP06776458A EP06776458A EP1910063A1 EP 1910063 A1 EP1910063 A1 EP 1910063A1 EP 06776458 A EP06776458 A EP 06776458A EP 06776458 A EP06776458 A EP 06776458A EP 1910063 A1 EP1910063 A1 EP 1910063A1
Authority
EP
European Patent Office
Prior art keywords
fastening element
shaft
element according
ribs
bore
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
EP06776458A
Other languages
German (de)
English (en)
Inventor
Roger Stadler
Bekim Bajramaj
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.)
Sepitec Foundation
Original Assignee
Sepitec Foundation
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 Sepitec Foundation filed Critical Sepitec Foundation
Publication of EP1910063A1 publication Critical patent/EP1910063A1/fr
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
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/08—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part
    • F16B21/084—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part with a series of flexible ribs or fins extending laterally from the shank of the stud, pin or spigot, said ribs or fins deforming predominantly in a direction parallel to the direction of insertion of the shank
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/02—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose in one piece with protrusions or ridges on the shaft
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/006—Non-metallic fasteners using screw-thread
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/06—Specially-shaped heads
    • 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
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/044—Nut cages
    • 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
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"

Definitions

  • the invention relates to a fastening element for insertion into a bore, which has an insertable into a bore, provided with a roughened and / or profiled surface shaft and optionally a stop collar.
  • fasteners are known for example from WO03 / 042551A2 or US2005 / 0025606A1.
  • These fasteners are made of a plastically deformable material, wherein the roughened and / or profiled shaft is inserted into the bore of a workpiece. After insertion, a bolt or a ball body is pulled or pushed through the opening in the shaft, whereby a plastic deformation of the shaft and usually the bore wall in the workpiece takes place. The outer wall of the roughened and / or profiled shank of the fastening element then engages positively in the wall of the bore.
  • the present invention has therefore set itself the task of creating a fastener of the type mentioned, which can be used without additional parts for a plastic deformation and still brings the required strength values when used in workpieces made of various materials with it.
  • the fastening element is formed from a possibly fiber-reinforced, elastically deformable material, wherein its shaft is inserted or inserted with elastic deformation into the bore in a force-fitting manner.
  • the shaft is formed as a solid profile. This is recommended if particularly large axial extraction forces are required. It then acts the whole full cross-section of the shaft for the elastic adhesion of the compound.
  • the shaft is designed as a tubular profile.
  • the fastening element can also be used in the region of the shaft for further possibilities, since a central passage opening is present.
  • the shaft is provided on its outer surface with ribs, grooves, knobs, shafts and / or gears.
  • the frictional connection can thereby be significantly improved, since these surface formations can deform elastically on all sides, so that just an optimal frictional connection with the wall of the hole can be achieved in the tool.
  • a variant embodiment provides that ribs extending at least approximately axially parallel to the central axis of the shank and having grooves or shafts running essentially transversely thereto are formed on the outer surface of the shank to form a kind of toothing. As a result, the section-wise or punctiform contact pressure is further improved and a release in the axial direction of the shaft or even a rotation relative to the workpiece is prevented.
  • a further embodiment provides that the ribs or nubs or waves or teeth protrude differently far in the radial direction. This creates zones with a larger and smaller elastic contact force, so that an optimal introduction of force from the fastening element into the workpiece is provided.
  • a further advantageous embodiment provides that in each case one or more narrow ribs with optionally toothings or shafts and one or more wider ribs with optionally toothings or waves alternately follow one another on the circumference of the shank. This also contributes to the formation of zones of different sizes of elastic contact force.
  • Another construction provides that a plurality of axially parallel aligned ribs are formed, with ribs running in each case between a few such ribs in the circumferential direction of the shaft. This results both in the axial direction of the shaft as well as in the circumferential direction of the same a special hold, since the elastic contact pressure is distributed according to this sense.
  • the nubs be in the form of pyramid or conical or truncated pyramid - or frustoconical elements are formed.
  • the ribs, grooves, knobs, shafts and / or toothings expire at an acute angle towards the end, at least at the end region of the shank.
  • the insertion of the shank of the fastener into the bore on the workpiece is much easier to accomplish.
  • the pressure required for the subsequent press-fitting is then fully used for setting the fastening element, so that after setting the optimum elastic adhesion can be achieved.
  • a further embodiment provides that one or more circumferential grooves, grooves od. Like. Are formed on the shaft in addition to the ribs, grooves, knobs, shafts and / or gears, wherein the diameter measured at the groove or groove bottom is smaller than that Diameter of the hole in the workpiece into which the shaft is to be inserted.
  • a special security against dillaminating be achieved because the contact area between the shaft and bore in the workpiece is reduced. This property is not only for thin-walled structures or workpieces, but is to be realized in the same way advantageous for thicker workpieces.
  • a further embodiment of a fastening element provides that the stop collar is followed by a cage-like holder for receiving a screw nut or a screw head.
  • the fastener can therefore also be used to hold other fasteners, especially since the fastener itself is sufficiently connected to the workpiece by elastic frictional connection.
  • a variant provides that on the stop collar on the side opposite the shaft, an axially aligned with the shaft threaded bolt integrally connected. It is thus the fastener itself equips with a threaded bolt, with which many connectivity can be solved.
  • FIG. 1 shows a fastener inserted into a workpiece, wherein the workpiece is shown cut away;
  • Figure 2 is a view of the fastener from the side.
  • Fig. 3 is a plan view of the fastener;
  • Figures 4 and 5 are perspective views of the fastener.
  • Figures 6, 7 and 8 different perspective views of a second embodiment of a fastener.
  • FIGS. 6, 7 and 8 show a view of the fastening element according to FIGS. 6, 7 and 8 from below;
  • FIG. 10 is a side view of a third embodiment of a fastener; 11 shows a view of the fastening element according to FIG. 10 from above; FIG.
  • FIG. 12 shows a fastening element according to FIGS.
  • FIGS. 13 and 14 show two perspective views of a fastening element according to FIGS. 10 to 12;
  • 15 shows an embodiment of the invention in which the fastening element has an axial length which is greater than the thickness of the workpiece or even in the case of thin-walled structures;
  • Fig. 16 shows an embodiment of the invention, in which the shaft additionally has a circumferential groove, which is still spaced from the bore wall in a workpiece during the elastic deformation of the shaft, even after the deformation.
  • a fastener 1 for insertion into a bore 2 of a workpiece 3 which has a bore 2 in the insertable, provided with a roughened and / or profiled surface 4 shaft 5 and optionally a stop collar 6.
  • the fastening element 1 is formed from an optionally fiber-reinforced, elastically deformable material.
  • the shank of the fastening element can be inserted or inserted in a force-fitting manner into the bore 2 with elastic deformation. It should superiors see an optionally fiber-reinforced plastic use. In the context of the invention, the most diverse plastic materials or plastic-like materials can be used.
  • fastening element can be deformed elastically, so that always a frictional connection between the shaft 5 and the wall 7 of the bore 2 in the workpiece 3 can be achieved.
  • the workpiece itself or else both the workpiece 3 and the fastening element 1 from an elastically deformable material and that advantageously from an optionally fiber-reinforced plastic.
  • the shaft 5 may be formed as a solid profile or as a tubular profile. These can be cylindrical profiles or profiles with different, adapted to the application cross-sectional shapes. Especially with a deviating from the cylindrical shape cross-sectional shape can be achieved in addition to the traction when inserting the fastener a form fit, thereby creating the ability to transmit correspondingly higher torques can.
  • the cross-section of the passage opening may be of the same shape or different from the cross-section of the outer boundary of the profile.
  • the shaft 5 is provided on its outer surface 4 with ribs 8, 9, grooves, knobs, shafts and / or teeth.
  • ribs 8 may be formed with substantially transversely extending grooves 10 to form a kind of teeth.
  • the ribs 8 or nubs or teeth collar differently far in the radial direction.
  • a plurality of axially aligned ribs 8 are formed, with 9 ribs extending between each of a number of such ribs 8 in the circumferential direction of the shaft 5.
  • nubs in the form of pyramidal or conical or truncated pyramidal or truncated cone shaped elements in addition to the ribs or else adjacent to the ribs.
  • the ribs 8, 9, grooves, knobs, shafts and / or teeth expire at least at the end of the shaft 5 at an acute angle to the end. As a result, a simpler introduction of the shaft 5 in the bore 2 on the workpiece 3 is possible.
  • the fastener 1 is inserted from the one side of the workpiece into the bore 2 in the workpiece 3, of course, a corresponding force is required to elastically deform the ribs 8, 9, grooves, knobs and / or gears or waves accordingly can.
  • a setting tool can be used, which acts only from one side or from both sides of the workpiece ago and optionally works with mating brackets.
  • an optimal frictional connection between the outer boundary 4 of the shaft 5 and the wall 7 of the bore 2 is created, which does not deteriorate even after prolonged use.
  • the elastic connection ensures a constant contact pressure, which can not be affected by shock, vibration or temperature changes. Even if the fastening element and the workpiece are formed from materials of different coefficients of expansion, this can not lead to a release of the connection.
  • the fastening element according to the invention can therefore be used in a preferred manner everywhere where it comes to particularly secure fasteners, so especially in aircraft and even in vehicle.
  • a use anywhere in mechanical engineering or in electrical engineering, but also in the chemical field is possible.
  • the passage opening 11 is expediently provided with a thread, so that here directly threaded elements, such as e.g. Screws, can be used.
  • a stop collar 6 which connects a cage-like holder 12 for receiving a movable nut or a screw head. It can thus be used here form-fitting further fasteners, which are then secured against rotation and in the axial direction against pulling out.
  • no additional clip for holding further fastening parts is required due to the special shaping possibility in the case of a plastic part.
  • a fastening element 1 is provided, in which the stop collar 6 on the opposite side of the shaft 5, an axis aligned with the shaft 5 aligned bolt 13 integrally connected.
  • This bolt 13 is formed as a threaded bolt so that other parts can be attached directly to it, for example, with a nut.
  • an inventive fastening element 1 can be used in a particularly advantageous manner even with relatively thin workpieces 3. This results in an overlap in the tip region of the workpiece, so that the fixation of the fastener is supported especially in thin-walled structures.
  • a plate-shaped or disk-shaped stop 14 may be arranged here at the top of the fastening element, ie on the stop collar 6 or instead of the stop collar, in order to additionally guarantee the bending and tear resistance.
  • the passage opening in the shaft 5 may of course be present and optionally have a thread.
  • the shaft 5 of the fastening element has an axial length which is greater than the thickness of the workpiece 3, the section 16 of the shaft 5 projecting on the rear side 15 of the workpiece 3 can reappear in the bore of the workpiece 3 after the elastic compression spread elastically to the outside.
  • the retention of the fastener 1 is therefore especially good for thin-walled structures, ie thin workpieces 3.
  • the design possibility shown here in FIG. 15 can also be used in the embodiments according to FIGS. 1 to 14. Even with these other constructions, a hitherto impossible fastening from one side has thus been achieved, especially with thin-walled structures.
  • a circumferential circumferential groove 17 is provided on the shaft 5, which groove is here formed in the end zone of the shaft 5 in order to reduce the contact area between the bore wall in the workpiece 3 and the shaft. Especially in this area, the frictional forces have then been reduced when setting the fastener. Precisely when using the fastening element in a workpiece made of a composite structure, it is thus possible to prevent a possible bursting of the last layers during the pressing in of the shank 5.
  • the groove 17 may also be arranged at a different location with respect to the axial length of the shaft 5, if at another point a specific zone is given, in which the frictional forces are to be reduced when setting the fastener.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Dowels (AREA)
  • Clamps And Clips (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

L'invention concerne un élément de fixation (1) à insérer dans un alésage (2) d'une pièce (3), qui comprend une tige (5) insérable dans un alésage (2) et présentant une surface striée et/ou profilée (4), ainsi qu'éventuellement un collet de butée (6). L'élément de fixation (1) selon l'invention est réalisé dans un matériau élastiquement déformable éventuellement renforcé par des fibres et sa tige (5) peut être insérée ou est insérée dans l'alésage (2) par liaison de force avec déformation élastique.
EP06776458A 2005-08-01 2006-07-27 Element de fixation a inserer dans un alesage Ceased EP1910063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005036110A DE102005036110A1 (de) 2005-08-01 2005-08-01 Befestigungselement zum Einsetzen in eine Bohrung
PCT/EP2006/007445 WO2007014697A1 (fr) 2005-08-01 2006-07-27 Element de fixation a inserer dans un alesage

Publications (1)

Publication Number Publication Date
EP1910063A1 true EP1910063A1 (fr) 2008-04-16

Family

ID=37192358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776458A Ceased EP1910063A1 (fr) 2005-08-01 2006-07-27 Element de fixation a inserer dans un alesage

Country Status (6)

Country Link
US (1) US20080170928A1 (fr)
EP (1) EP1910063A1 (fr)
JP (1) JP2009503410A (fr)
CA (1) CA2617577A1 (fr)
DE (1) DE102005036110A1 (fr)
WO (1) WO2007014697A1 (fr)

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Also Published As

Publication number Publication date
WO2007014697A1 (fr) 2007-02-08
CA2617577A1 (fr) 2007-02-08
JP2009503410A (ja) 2009-01-29
US20080170928A1 (en) 2008-07-17
DE102005036110A1 (de) 2007-02-08

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