WO2010146018A1 - Système de fixation d'un panneau - Google Patents

Système de fixation d'un panneau Download PDF

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Publication number
WO2010146018A1
WO2010146018A1 PCT/EP2010/058311 EP2010058311W WO2010146018A1 WO 2010146018 A1 WO2010146018 A1 WO 2010146018A1 EP 2010058311 W EP2010058311 W EP 2010058311W WO 2010146018 A1 WO2010146018 A1 WO 2010146018A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
nut
panel
securing
substructure
Prior art date
Application number
PCT/EP2010/058311
Other languages
German (de)
English (en)
Inventor
Sascha Costabel
Olav Schendel
Original Assignee
Sfs Intec Holding 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 Sfs Intec Holding Ag filed Critical Sfs Intec Holding Ag
Publication of WO2010146018A1 publication Critical patent/WO2010146018A1/fr

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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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/32—Locking by means of a pawl or pawl-like tongue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/18—Floors
    • 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
    • F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
    • F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
    • F16B37/065—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the nut
    • F16B37/067—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the nut the material of the nut being deformed by a threaded member generating axial movement of the threaded part of the nut, e.g. blind rivet type

Definitions

  • Item System for attaching a panel
  • the invention relates to a system for securing a panel such as a sandwich floor panel on a substructure such as a seat rail of an aircraft by a screw with a fuse of the screw against detachment of the screw and nut by vibration.
  • clip nuts for producing the connection, as are known, for example, from US Pat. No. 6,918,725 B2.
  • Clip nuts are adapted to be clipped onto a first component which is to be bolted to a second component, but is itself too thin to receive a female thread, and moreover destined to be mounted on the second component on one side be inaccessible during assembly, so that no separate nut can be mounted on the side facing away from the second component side of the first component.
  • the Clip nut has been mounted on the first component, over which it has been pushed so far for this purpose, to a on a clamping arm thereof to another clamping arm thereof protruding toward flange is engaged in a corresponding bore in the first component, the second component be applied to the opposite side to the flange of the one clamping arm. Subsequently, a screw can be screwed and tightened through the second component and the clip into the nut held by the latter in order to firmly connect the two components together, as described in detail in the aforementioned US Pat. No. 6,918,725 B2. As a backup of the screw, the clip nut is squeezed slightly oval before use.
  • the solution with a clip can be used when mounting lightweight panels. However, the possibility of a sealed connection must be avoided. Furthermore, as soon as there is a demand that it must be possible to loosen and re-establish the connection several times, a solution with a nut which has been previously slightly oval-squeezed to secure the connection is no longer suitable. When screwing in or unscrewing a bolt into a crimped nut, the thread of the bolt is damaged to a maximum of 5 cycles. Furthermore, a clip nut can not be preassembled captive already in the production of seat rails or seat rails in an airplane because the clip would not be stable enough for this, with the result that at least some clip nuts would no longer be present later in the panel assembly. The clip nuts are therefore usually attached to the seat rails only during final assembly. This leads to a higher effort in the final assembly.
  • the object of the invention is to provide a system of the type described above in such a way that substantially more insertion and Ausschraubzyklen are possible without damaging the connecting elements, that a seal of the compound against liquids is possible and that the assembly costs at the Endmon- minimized as far as possible and overall cost reductions are achieved.
  • the screw lock is decoupled from the thread of the screw and the nut, because the screw is provided for the screw lock with a non-circular cross-section extension with which the fuse element is resiliently and positively engaged or can be brought. If in the fastening system according to the invention, the screw is screwed into the nut and finally exits at the opposite end of the nut, the non-circular cross-section end of the screw comes with the resiliently shaped securing element in positive engagement. The connection can just as easily be released again by turning the screw in the opposite direction. The thread of screw and nut remains completely undamaged.
  • This screw lock is produced at least fifty times in the system according to the invention and again detachable. There is also no problem to provide between screw and nut for a seal against liquids.
  • the connecting elements of the screw can be pre-assembled in the substructure or in the panel, which minimizes the assembly work in the final assembly.
  • the nut is attached to the substructure or attachable blind rivet nut. This allows the connection of screws Be and produce mother from one side.
  • the blind rivet nut is pulled out of the hole by means of a riveting tool.
  • the blind rivet nut forms a rivet head on the substructure side. This rivet head secures the blind rivet nut to the substructure, allowing the panel to be secured to the substructure by screwing the screw in from the panel side without having to hold the blind rivet nut in place. This is namely mounted against rotation on the substructure by the riveting process.
  • the screw has a kind of splines in its non-round end region. This is expediently designed with rounded edges, so that a repeated positive engagement between the fuse element and screw without significant wear takes place.
  • the securing element has a first arm which carries a spring clip which engages around the non-round end region and which engages in the manner of splines.
  • the securing element is preferably made of stainless steel.
  • the securing element is a separate component which is decoupled from the thread of the connecting elements of the screw connection and thus allows the desired number of at least 50 insertion and Ausschraubzyklen.
  • the securing element has a second arm which engages around the spring clip.
  • the second arm protects the spring clip from axial deflection by the screw. This prevents that the resilient parts of the securing element are bent too much outwards and lose their spring action.
  • the securing element has a retaining ring which carries the two arms and is fixedly attached to the nut itself and / or with the nut set between the nut and the substructure is clamped rotatably.
  • the system comprises a first insert bush, which is designed for fastening in the panel and for receiving the screw in a recessed manner.
  • first insert bush is provided in the panel for fastening the screw, it can be achieved that the joint in the panel can absorb higher forces, so that a lightweight panel in sandwich construction can be used.
  • a sealing ring is arranged between the first insert bushing and a head of the screw.
  • the sealing ring makes it possible to seal under the head of the screw. This can be made by applying the sealing ring on the underside of the head of the screw or on the first insert bush or by inserting the sealing ring between these two components.
  • the set screw in the first insert bush radial play is preferably made in the insert sleeve with a corresponding oversize. This ensures that an X or Y movement in the plane of the panel is made possible and so manufacturing tolerances can be compensated. It also allows for faster installation.
  • the nut is designed as a clamping nut, which is axially displaceable in the panel and rotatable up to 180 °.
  • the use of such a clamping nut allows a much simplified construction of the substructure, because there is neither a hole nor the attachment of a blind rivet nut required.
  • the clamping nut has a bolt with which the panel between the substructure and the screw can be clamped is.
  • a second insert bushing is used, which is designed for fastening in the panel and for receiving the screw in a recessed manner and in addition so that the nut can be axially displaced in the second insert bushing and rotated by up to 180 °.
  • At least one guide element is attached to the nut, which is engaged with at least one panel-side guide element, which limits the rotational movement of the nut, which can be up to 180 °. This allows the simplification of the structure of the substructure, because the guiding and clamping functions need only be provided on the panel side.
  • the guide element attached to the nut is a guide pin and there are two panel-side guide elements which are each formed in the second insert bushing as extending over up to 180 ° groove or as an associated with this axial groove ,
  • the entire leadership function can be so easily realized by appropriate design of the clamping nut and the second insert sleeve.
  • the screw has the shape of a polygon in its non-circular end region in cross section.
  • the securing element is designed as a securing bracket, which is inserted into a radial circumferential slot of the nut and with two elastically resiliently deflectable arms with the non-circular portion of the screw is engaged or can be brought.
  • the securing bracket corresponds at least partially to the cross section of the non-circular end region, wherein the securing bracket has a slightly smaller inner diameter.
  • an axial web for releasably holding the securing bracket is present in the circumferential slot of the nut. Because of this web, the securing bracket on the mother is pre-mounted attachable captive.
  • the securing bracket preferably has a cross section corresponding to the cross section of the web and can be clipped onto it.
  • the einclipbaren elements of the securing bracket are designed so that they can not leave the pre-assembled position on the web even when turning the screw by the springs of the front part of the securing bracket.
  • the securing element supports the torque transmission between the screw and the nut by means of a torque transmission aid.
  • the resiliently elastically deflectable arms of the securing bracket can be designed so that the arms are resiliently deflectable with little force, but that nevertheless a high torque between the screw and the clamping nut can be transmitted.
  • a compression spring is arranged between the head of the screw and the second insert bushing about the shank of the screw. This causes the screw in the unfinished state from the Panel protrudes. This makes it visually clear if the mounting system is not properly mounted and the panel is not clamped between the substructure and the screw head. When correctly installed, the screw is preferably completely recessed in the panel.
  • a sealing ring is arranged between the second insert bushing and the head of the screw. This allows the desired sealing of the screw connection also in the embodiment in which a nut with a bolt is used as a nut.
  • the insert sleeve made of plastic and is glued or glued to the panel.
  • a suitable plastic for a thermoplastic such as B. Torion or PEEK in question.
  • This can be compared to the glass fiber reinforced plug to achieve a weight saving.
  • weight is an important criterion.
  • Fig. 1 in a longitudinal sectional view of a first embodiment of a
  • FIG. 2 shows a perspective partial representation of a screw connection produced with the system according to FIG. 1 with an associated screw lock
  • FIG. Fig. 3 in an exploded view of the system of FIG. 1 for
  • FIG. 4 shows in a longitudinal sectional view a second embodiment of the system according to the invention in a preassembled state
  • FIG. 6 is a cross-sectional view for illustrating a screw lock used in the second embodiment
  • FIG. 7 shows the system of FIG. 4 in exploded view and additionally a detail A in an enlarged view
  • FIG. 9 shows the insert bush according to FIG. 8 in a view from below, FIG.
  • Fig. 10 shows the assembly of a sandwich floor panel with the second embodiment of the system according to the invention before placing the floor panel on a seat rail of an aircraft and
  • the first embodiment of the fastening system is shown in Figs. 1-3.
  • the second embodiment of the fastening system, indicated generally at 110 is shown in Figs. 5-11. With reference to these figures, the two embodiments will be described below. In the second embodiment, the same or similar parts as in the first embodiment carry reference numbers increased by 100.
  • An integral part of the first embodiment of the fastening system 10 according to the invention is a blind nut 12, whereas an essential component of the second embodiment of the fastening system 110 according to the invention is a clamping nut 112.
  • Fig. 1 shows the generally designated 10 first embodiment of the fastening system according to the invention in a longitudinal sectional view in an already assembled state.
  • the system 10 is used to attach a panel 20, here a sandwich floor panel, on a substructure 22, here a seat rail of an aircraft, by a generally designated 30 screw from the blind rivet nut 12 and a screw 14 with a fuse element 40 to secure the screw 30 against detachment of screw 14 and blind rivet nut 12 by vibration.
  • the screw 14 is provided with a non-circular cross-section end portion 16.
  • the securing element 40 is rotatably connected to the blind rivet nut 12 and is elastically resilient with the non-circular end portion 16 in positive engagement.
  • the screw 14 has a head 14a with a tool internal attack 14b.
  • the fastening system 10 is completed by an insert bushing 50 mounted in a bore 24 of the panel 20.
  • the insert bushing 50 has an upper shoulder having an annular groove in which a sealing ring 60 formed as an O-ring is disposed, which on the opposite underside of the screw head 14 a sealingly abuts.
  • a sealing ring 60 formed as an O-ring is disposed, which on the opposite underside of the screw head 14 a sealingly abuts.
  • a thread 18 is formed which is in engagement with the thread of the blind rivet nut 12.
  • a sealing tape 23 is arranged between the panel 20 and the substructure 22.
  • the insert sleeve 50 is made by injection molding from a reinforced high-tech thermoplastic material such as Torion or PEEK and glued into the bore of the panel 20 by means of polyurethane adhesive.
  • the insert bushing 50 serves as a bearing for the sealing ring 60.
  • the insert bushing 50 has a countersunk bore 54 at its upper side in FIG. 1, which is dimensioned so that the screw head 14a is flush with the upper side of the insert bushing 50 with the screw 14 set is.
  • the insert sleeve 50 is in turn sized and inserted into the bore 24 of the panel 20 so that it is flush with the upper and lower sides, as can be seen in Fig. 1.
  • the insert sleeve 50 is further dimensioned to allow the screw 14 a radial clearance, which is preferably 0.8 mm.
  • the blind rivet nut 12 is shown in Fig. 3 in the not yet set state, in Fig. 1, however, in the set state in which it is attached to the substructure 22.
  • the blind rivet nut 12 is inserted into a hole 29 in the substructure 22 and axially contracted by a conventional Blindnietsetztechnikmaschine so that the blind rivet on the underside of the substructure forms a bead 26 and the substructure 22 rotatably between the bead 26 and an upper collar 27 of the blind rivet nut is clamped.
  • the securing element 40 has a retaining ring 48, which is clamped in a rotationally fixed manner when setting the blind rivet nut 12 between the bead 26 and the underside of the substructure 22, as shown in FIG. Alternatively, the retaining ring 48 but also attached to the blind rivet nut 12 from the house, z. B. welded.
  • the blind rivet nut 12 is preferably made of stainless steel.
  • FIG. 2 shows in a perspective partial view a screw connection produced with the fastening system 10 according to FIG. 1 with an associated screw connection Screw lock to secure the screw against loosening of screw 14 and nut 12 by vibration.
  • the screw 14 has in its non-circular end region 16 a type of spline 17, which is formed by mutually alternating teeth 17a and tooth gaps 17b.
  • the securing element 40 has a first arm 42 which carries a spring clip 44 engaging around the lower end region 16 and which engages with a radially inwardly projecting end into one of the tooth spaces 17b of the spline 17.
  • the securing element 40 is fixed in the first embodiment described here in the setting of the blind rivet nut 12 on the substructure 22.
  • the securing element 40 is a separate part, which is decoupled from the thread 18 of the screw 14 and the thread of the blind rivet nut 12, thus ensuring at least 50 screwing-in and Ausschraubzyklen of the screw 14.
  • the teeth 17a of the spline 17 are rounded as shown above to keep the wear of the teeth 17a and the spring clip 44 as low as possible.
  • the spring clip 44 of the securing element 40 provides a locking torque on the screw 14 of a maximum of 150 Ncm and a breakaway torque of at least 80 Ncm.
  • the securing element 40 has a second arm 46 which engages around the spring clip 44 and protects the spring clip 44 against axial bending by the screw 14.
  • the securing element 40 also has the retaining ring 48, which carries the two arms 42, 46 and, as already explained above, is fixedly attached to the blind rivet nut 12 itself and / or is clamped in place against the blind rivet nut between the blind rivet nut and the substructure 22 , The latter alternative is shown in FIG.
  • the securing element 40 is also preferably made of stainless steel.
  • FIG. 3 The exploded view of the fastening system 10 of FIG. 1, shown in FIG. 3, illustrates attaching the panel 20, which here is a sandwich floor panel, to a substructure 22, here the seat rail of an aircraft.
  • the insert bushing 50 is already fastened in the bore 24 in the panel 20.
  • the blind rivet nut 12 is, as already described above, through the insert bushing 50 into the Hole 29 introduced.
  • the securing element 40 is pushed over the blind rivet nut 12 from below until it is in contact with the underside of the substructure 22.
  • the blind rivet nut 12 is set with a blind rivet setting device, that is fixed to the substructure 22 together with the securing element 40, as shown in FIG.
  • the screw 14 is screwed with its thread 18 in the corresponding internal thread of the blind rivet nut 12 until it is recessed with its head 14a in the insert sleeve 50.
  • the blind rivet nut 12 ratchets the non-circular end portion 16 in the spring clip 44 until the screw 14 finally occupies the position shown in Figs. 1 and 2 and the spring clip 44 finally engages in a tooth gap 17b.
  • the panel 20 has thus been fastened to the substructure 22 by the screw connection and at the same time a screw lock has been produced which secures the screw connection against detachment of the screw 14 and blind rivet nut 12 by vibration.
  • Fig. 4 shows in a longitudinal sectional view of the second embodiment of the system according to the invention in a preassembled state, wherein the fastening system is indicated as a whole by 110.
  • Fig. 5 shows in a same view as in Fig. 4, the fastening system 110 in the assembled state.
  • 6 shows a cross-sectional view for demonstrating a screw lock used in the fastening system 110. This cross-sectional view is for demonstration purposes only, d. H. it does not correspond to a cross-sectional view corresponding to the state of the fastening system 110 shown in FIG. 4 or 5.
  • the attachment system 110 serves to secure a panel 120, which is also a sandwich floor panel, to a substructure 122, which is also a seat track of an aircraft here, by a screw 130 with a backup of the screw against detachment of a screw 114 and the clamping nut 112 by vibration.
  • the screw 114 is provided with a non-circular cross-section end portion 116 in which the screw has the shape of a polygon 117 in cross-section, as can be seen in Fig. 6.
  • the clamping nut 112 is preferably manufactured as a cold-forged part.
  • the screw lock of the fastening system 110 includes, in addition to the non-circular end portion 116 of the screw 114 a securing element 140 which is rotatably connected to the clamping nut 112 and elastically resiliently and positively with the non-circular end portion 116 is engaged, as best in Fig. 6 can be seen.
  • the nut 112 is a tightening nut that is axially slidable in the panel 120 and rotatable within a range of up to 180 °.
  • a rotation angle of 180 ° is indeed preferred, a rotation angle of z. B. only 90 °, however, would also be suitable.
  • the clamping nut 112 has a latch 113 with which the panel 120 between the substructure 122 and the screw 114 can be clamped.
  • the panel 120 on the substructure 122 has not yet been tightened.
  • the latch 113 engages on the underside of the substructure 122 and the panel 120 is clamped between the screw 114 and the substructure 122.
  • an insert sleeve 150 is mounted in the panel 120 and adapted to receive the screw 114 recessed and also formed so that the clamping nut 112 in the insert sleeve 150 is axially displaceable and rotatable at angles of up to 180 °.
  • Insert liner 150 is a thermoplastic component made by injection molding from reinforced high-tech thermoplastic material such as Torion or PEEK.
  • the insert bushing 150 is inserted into a bore 124 in the panel 120 glued.
  • a polyurethane adhesive is also suitably used here.
  • FIG. 7 shows the fastening system 110 according to FIG. 4 in an exploded view.
  • the non-circular end region 116 is shown enlarged in order to make its plane surfaces more visible, which result in the cross-section of the polygon 117.
  • a guide member is mounted, which is engaged with at least one panel-side guide member which limits the rotational movement of the nut 112.
  • the guide element attached to the nut 112 is a guide pin 175 in the second embodiment of the fastening system described herein.
  • FIG. 8 shows a detail of the insert sleeve 150 of the fastening system 110 in a perspective view.
  • Fig. 9 shows the insert sleeve 150 of FIG. 8 in a view from below.
  • the groove 155 extending over 180 ° and the axial groove 156 communicating therewith can best be seen.
  • the upper end of the axial groove 156 is visible in FIG. 7 and also in FIG. 8.
  • the guide pin 175 of the tightening nut 112 is in the groove 155 and on a stop 157 shown in FIG.
  • the screw 114 in the illustration in FIG. 4 is inevitably pressed downwards by the screwdriver, whose bit is inserted into the tool inner engagement 114b.
  • the mutual static friction between the external thread 118 of the screw 114 and the internal thread of the clamping nut 112 causes the clamping nut 112 begins to join the rotation of the screw.
  • the guide pin 175 moves away from the stop 157, while the bolt 113 is rotated under the substructure 122.
  • the securing element 140 is designed as a securing bracket 144 which, as shown in FIG. 7, is inserted into a circumferential radial slot 170 of the clamping nut 112.
  • a circumferential slot 170 of the clamping nut 112 as shown in Fig. 6, an axial web 176 for releasably holding the securing bracket 144 is present.
  • the securing bracket 144 is clipped onto the web 176 when it is inserted into the circumferential slot 170 of the nut 112, as can be seen in FIG.
  • a radial projection on the bolt 113 on its side facing the screw 114 forms a torque-transmitting aid 172, which assists the securing element 140 in the torque transmission from the screw 114 to the clamping nut 112.
  • the clamping nut 112 maintains the position shown in Fig. 4, while the screw 112 finally returns to the position shown in Fig. 4, in the the head 114a of the screw 114 again protrudes above the panel 120.
  • Fig. 6 serves to illustrate the position of the securing bracket 144 in relation to the screw 114 and the clamping nut 112 and to illustrate the captive attachment of the securing bracket 144 to the web 176 and to illustrate the torque transmission between the securing bracket 144 and the bolt 113.
  • the guide pin 175 is of course not on the stop 157, but in a contrast rotated by 180 ° position, namely under or in the axial groove 156th 6 is for demonstration purposes only and does not illustrate the position of the guide pin 175 when the latch 113 is in the cocking position of FIG.
  • a compression spring 180 is disposed about the shaft of the screw 114, as best seen in Figs. 4, 5 and 7.
  • the compression spring 180 is important only for indexing: if the bolt 113 does not fit under the substructure 122, that is, has not quite reached the tensioning position, the clamping nut 112 can still be tightened by means of the screw 114. In this case, however, presses the compression spring 180, the screw 114 so far up that it projects beyond the panel 120 to the outside. This position is an indication that the threaded connection 130 has not yet been made or is not properly made.
  • the compression spring 180 thus fulfills no attachment function.
  • the compression spring 180 is shown here as a helical compression spring, it could, however, be replaced by a rubber pressure buffer or the like.
  • a sealing ring 160 formed as an O-ring is disposed in the fastening system 110 between the screw 114 and the insert sleeve 150.
  • the sealing ring 160 is seated as shown in FIGS. 4 and 5 on the circumference of a below the head of the screw. be provided federal government and is in the assembled state of the fastening system 110, which is shown in Fig. 5, on the inner wall of a pregnant- senkbohrung in the insert sleeve 150, as can be seen in Fig. 5.
  • the inner wall of the intermediate counterbore of the insert bushing 150, against which the sealing ring 160 rests, is tapered downwards in the illustration in FIG. 5, which facilitates the sealing.
  • the compression spring 180 which is supported at one end on the underside of the head 114a of the screw 114 and the other end in the insert sleeve 150, in the illustration in Fig. 4, the screw 114 upwards.
  • the guide pin 175 is located in the clamping nut 112 in the groove 155th
  • the fastening of a panel 120 to a substructure 122 with the aid of the fastening system 110 will now be described in more detail with reference to FIGS. 10 and 11.
  • the securing bracket 144 has been previously preassembled on the clamping nut 112.
  • the insert sleeve 150 has been previously mounted in the panel 120 as shown in FIG.
  • the sealing ring 160 is applied to the collar under the head 114 a of the screw 114, the compression spring 180 is pushed over the screw shaft and the screw 114 is inserted with the compression spring 180 from above into the insert sleeve 150, while from below the clamping nut 112 in insert sleeve 150 is inserted.
  • the screw 114 is screwed into the clamping nut 112 until it is approximately in a position shown in Fig. 4.
  • the clamping nut 112 with the bolt 113 is then rotated by means of the screw 114 on the tool inner attack 114b from the position of FIG. 4 by 180 ° in a position in which the latch 113 is indeed under the substructure 122, but of this still Distance, the panel 120 is therefore not yet clamped between the screw and the bolt on the substructure 122.
  • the screw 114 is further screwed in, wherein now the guide pin is axially movable in the groove 156 and the safety bar 144 ratchets on the non-circular end portion 116.
  • the head 114a of the screw 114 which still protrudes from the panel 120 in FIG. 10, is sunk in the panel 120.
  • the guide pin 175 of the clamping device remains nut 112 in the groove 156, so that the panel 120 is clamped as shown in FIG. 11 on a flange of a seat rail.
  • the illustration in FIGS. 10 and 11 shows that the substructure 122 does not require any holes in comparison with the substructure 22 for the fastening, so that the substructure 122 can be simpler in construction than when the fastening system 10 is used.

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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un système de fixation d'un panneau, tel qu'un panneau de plancher sandwich, sur une structure inférieure telle qu'un rail de siège pour aéronef, au moyen d'un raccordement par vis présentant un frein contre le desserrage de la vis (14) et de l'écrou (12) dû aux vibrations. La vis (14) est munie d'une zone d'extrémité (16) ovale en section transversale. Un élément de frein (40) est relié de façon solidaire en rotation à l'écrou (14) et vient en prise avec la zone d'extrémité (16) ovale de façon élastique et par complémentarité de forme avec cette dernière. Dans ce système de fixation, le frein de vis est désaccouplé des filets de la vis (14) et de l'écrou (12) et permet par conséquent un nombre considérable de cycles de vissage et de dévissage du raccordement par vis. L'écrou (12) est un écrou à rivet aveugle fixé sur la structure inférieure. Le frein de vis n'ajoute qu'un poids supplémentaire minime au système de fixation, qui présente un poids total très faible et est par conséquent particulièrement approprié pour une utilisation dans des aéronefs.
PCT/EP2010/058311 2009-06-16 2010-06-14 Système de fixation d'un panneau WO2010146018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910025121 DE102009025121B4 (de) 2009-06-16 2009-06-16 System zum Befestigen eines Panels
DE102009025121.9 2009-06-16

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WO2010146018A1 true WO2010146018A1 (fr) 2010-12-23

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GB2479430A (en) * 2010-02-22 2011-10-12 John Kenneth Hastings A tool for installing rivet nuts

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015107383A1 (de) * 2015-05-11 2016-11-17 Kvt-Fastening Ag Befestigungsvorrichtung sowie deren Verwendung
CN109572992B (zh) * 2018-12-31 2024-01-30 江西冠一通用飞机有限公司 一种稳定性强且安装牢固的固定翼飞机机翼

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