WO2008125576A2 - Cheville de fixation de tableau de bord - Google Patents

Cheville de fixation de tableau de bord Download PDF

Info

Publication number
WO2008125576A2
WO2008125576A2 PCT/EP2008/054313 EP2008054313W WO2008125576A2 WO 2008125576 A2 WO2008125576 A2 WO 2008125576A2 EP 2008054313 W EP2008054313 W EP 2008054313W WO 2008125576 A2 WO2008125576 A2 WO 2008125576A2
Authority
WO
WIPO (PCT)
Prior art keywords
dowel
clamping
radial
bore
projection
Prior art date
Application number
PCT/EP2008/054313
Other languages
German (de)
English (en)
Other versions
WO2008125576A3 (fr
Inventor
Martin Völker
Original Assignee
Basf Se
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 Basf Se filed Critical Basf Se
Publication of WO2008125576A2 publication Critical patent/WO2008125576A2/fr
Publication of WO2008125576A3 publication Critical patent/WO2008125576A3/fr

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
    • F16B21/02—Releasable fastening devices locking by rotation
    • 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
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
    • 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
    • F16B37/041—Releasable devices
    • F16B37/042—Releasable devices locking by rotation

Definitions

  • the invention relates to a dowel according to the preamble of claim 1 and a method for fixing a dowel according to claim 13.
  • Such dowels and fixing methods are used in particular in the automotive industry.
  • dowels Numerous different types of dowels are known in the prior art, which have been designed for a wide variety of applications. Such dowels usually have a Dübeldom for introduction into a bore, wherein the dowel dome usually has a circular cross-section. Furthermore, the dowels on a dowel head, which usually remains outside the bore.
  • a threaded bore which tapers to the dowel tip (i.e., towards the dowel head end facing away), which may also be cylindrical.
  • the dowel spreads in the radial direction and causes in this way a radial clamping in the bore.
  • a dashboard 110 is arranged overlapping a sheet 1 12, wherein the dashboard 1 10 and the plate 112 have congruent holes 1 14.
  • the bore 114 are configured square in these exemplary embodiments and can be produced, for example, by drilling, milling, punching or by suitable plastics engineering methods, for example corresponding cores in an injection molding tool, or by combinations of the methods mentioned or by other methods.
  • a dowel 1 16 is introduced into the holes 1 14.
  • the dowel has a dowel dome 1 18 with a square cross-section and a dowel head 120 dish-shaped in this embodiment.
  • the dowel dome 1 18 tapers towards its tip slightly, whereas the dowel head 120 facing the end of the dowel dome 118 substantially corresponds to the dimensions of the holes 1 14.
  • dowel doms 1 18 but also dowels 116 are known with non-tapered Dübeldom 1 18.
  • Sheet metal 112 and the instrument panel 110 thus causes a fixation of these elements against each other.
  • the material of the anchor 1 16 should be deformable and tough to ensure an elongation of the dowel dome 118 and thus the above-described clamping.
  • the material of the anchor 116 should, however, be hard and brittle in order to avoid destruction of the anchor 116 in the region of the threaded bore 122 even at high insertion torque of the screw into the threaded bore 122 or deformation of the anchor 16 in the region of the bores 14 in which, for example, the dowel 1 16 would rotate within the holes 1 14.
  • the object of the invention is therefore to provide a dowel, which is particularly suitable for automotive applications such as the applications described above and which ensures both a high spread and thus a high clamping, which, however, can be loaded simultaneously with a high insertion torque of a screw.
  • a basic idea of the present invention is to bring about a design separation of functional separation of clamping and high insertion torque.
  • a dowel is proposed, which is in principle suitable for use in a plate-shaped element.
  • the proposed dowel also includes a dowel dome for insertion into a bore (reference being made to the above description for the bore), the dowel dome having a substantially circular cross-section.
  • the dowel dome having a substantially circular cross-section.
  • Under “essentially” can also be a slight deviation from the circular shape, preferably a deviation in the diameter of not more than 5%.
  • the cross section may thus be slightly elliptical.
  • the plug has a relative to the dowel dome at least partially radially projecting dowel head.
  • this dowel head turn, as described above, dish-shaped, but may also have other shapes, such as a square or rectangular shape.
  • This dowel head essentially serves to prevent too deep penetration of the dowel into the bore.
  • the proposed dowel essentially corresponds to known dowel shapes, such as, for example, known wall dowels.
  • the anchor with the previous features no rotation for fixation in a dashboard.
  • the radial clamping region may have a substantially circular cross-section, wherein the at least one radial expansion is formed as protruding from the circumference of the circular cross-section projection.
  • this projection can be one or more projections with a rounded shape, for example a shape which follows at least in sections substantially in the form of a circular arc.
  • this at least one projection has a thickness of not more than 40% of the diameter of the circular cross section of the radial clamping area, preferably a thickness between 5 and 20% of the diameter.
  • the thickness of this radial clamping region can accordingly be matched to the thickness of the plate-shaped element
  • the material selection can be achieved solely due to the required torque.
  • the dowel dome can be configured circular, so in total have a substantially cylindrical shape. As a result, an optimal material utilization is achieved, and it is ensured a uniform expansion of the dowel dome or the entire anchor when screwing the screw.
  • the dowel with the dowel dome and the clamping area is inserted into the bore until the clamping area is arranged within the bore. Then, by screwing in a screw, the dowel is slightly rotated within the bore. As a result, the radial widening of the radial clamping area in the bore clamps firmly, so that a clamping is effected. In this case, the radial expansion can also deform, so that in addition to a radial adhesion and a positive connection can occur. Further rotation of the dowel within the bore is prevented by the radial clamping.
  • plastics which can be used for the anchor according to the invention are polyamide (with or without fillers, such as glass fiber fillings), PBT, POM, PSU, PES, PP, PE, ABS, ASA or other plastics or mixtures of said and / or other plastics.
  • the substantially cylindrical configuration of the dowel dome leads, as described above, to an optimal material utilization. Moreover, as a result of this configuration, which is now possible due to the functional separation of the clamping and the guarantee of high torque, fractures due to stress concentrations in the plug are also avoided. This reduces the scrap rate in the production of the dowels, and costly reworking can be largely avoided.
  • the radial clamping region can be adapted to the shape of the bore in terms of the number and configuration of the widenings, in particular of the projections. It is preferred if a hole in the form of a polygon is used, in particular a hole in the form of a (preferably equilateral) triangle or a square. This hole or the dowel should be designed such that the dowel with the radial clamping area in this hole can be inserted, oh- ne that larger game occurs, so with a precision fit, which still allows a comfortable insertion.
  • the circle of the radial clamping area is inscribed in the polygon of the bore. Accordingly, the number of expansions of the number of corners of the polygon is preferably adjusted. When inserting these projections then point in the direction of the corners, which can always be ensured during insertion by slight rotation of the anchor, so that insertion is always possible. If then, as described above, the dowel slightly rotated (for example, when screwing the screw into the threaded bore) within the bore, the widening wander into the region of the sides or edges of the polygon and clamp there.
  • the dowel for example, have three radial widenings, for example in the form of circular widenings, ie widening with increased diameter, for use preferably in a triangular bore.
  • four expansions may be provided, preferably for use in a square bore.
  • Other configurations of the widenings are also conceivable.
  • axial clamping element between the radial clamping region and the dowel dome.
  • This axial clamping element should be used in such a way that it can be pushed completely through the bore, in order then to be arranged on the dowel head on the side of the plate-shaped element facing away therefrom. Subsequently, by a slight rotation of the dowel, by which the above-described radial clamping is effected, a clamping force in the axial direction on the plate-shaped element between dowel head and axial clamping element are exerted by this axial clamping element.
  • the axial clamping element can have an axial clamping projection, which protrudes beyond the radial clamping area.
  • the dowel in the Area of the axial clamping projection on the whole a non-circular cross-section, such that can be pushed over the plate-shaped element by the above-described slight rotation of the clamping projection.
  • the effect of the axial clamping projection can be compared with a bayonet closure.
  • the axial clamping projection can in particular be designed in such a way that it has a clamping surface facing the dowel head.
  • the clamping surface should have a smaller distance to the plug head in at least one area than in another area.
  • the clamping surface may in particular have a flat surface which is inclined to a plane perpendicular to the dowel axis.
  • the dowel may have a polygonal cross-section, in particular in the region of the axial clamping element.
  • this cross-section should be designed such that this allows a push-through of the axial clamping element through the bore.
  • the cross section may, for example, in turn be triangular (in particular equilateral) or square, corresponding to the preferred bore shape.
  • the dowel may further comprise a tether in the form of a barb.
  • This captive can ensure, for example, that the dowel can first be easily inserted through the hole without turning the dowel it.
  • the hook prevents (for example, on a conveyor belt or in a production line) that the plugged only, but not yet clamped dowel slides out of the hole again, which can occur, for example, as a result of shocks.
  • the captive can be arranged in particular in the region of the axial clamping region.
  • the dowel head may have an opening, which causes an easier demolding in the manufacture of the anchor.
  • this breakthrough can be designed such that it allows the use of a simple open-to-tool, in spite of the above-described embodiment of the anchor with the axial clamping projection.
  • this axial clamping projection would require the use of more complex tools with corresponding cores to allow the undercut between the axial clamping projection and the dowel head.
  • the embodiment according to the invention with the aperture should therefore be designed in particular such that the aperture comprises at least the surface of an axial projection of the axial clamping projection on the dowel head. In this way, considerable investment costs can be saved in the production of the tool, which in turn can significantly reduce the unit prices of the dowels.
  • FIG. 1 shows a prior art clamping of a dashboard with a dowel with square cross-section
  • Figure 2 is a first view of a dowel according to the invention in a perspective view with a view towards the dowel head;
  • FIG 3 shows a further perspective view of the anchor according to Figure 2 with
  • Figure 4 is a perspective view of the anchor according to Figures 2 and 3 with plugged through a hole in a plate plug;
  • FIG. 5 shows the arrangement according to FIG. 4 in a perspective view with a view towards the dowel head
  • Figure 6 is a plan view of a dowel head with plugged into a hole dowel with a view parallel to the dowel axis.
  • FIGS. 2 to 5 show a preferred exemplary embodiment of an anchor 116 according to the invention. In each case, a quarter segment of the otherwise symmetrical dowel 1 16 is shown in these perspective views.
  • the dowel 1 16 has in this embodiment a total square dowel head 120 and a dowel dome 118 with a substantially circular Cross-section on. Inside, the dowel 116 has a threaded bore 122, which in this example is essentially a cylindrical threaded bore.
  • a radial clamping region 124 is arranged next to the dowel head 120.
  • this radial clamping region 124 reference should be made in particular to the illustration in FIG. It can be seen that, in the radial clamping region 124, the dowel 116 in turn essentially has a circular cross section which corresponds to the circular cross section in the dowel dome 118.
  • the radial clamping region 124 has radial widenings 126 in the form of four projections 128.
  • These projections 128 have substantially the shape of circular segments, which are applied to the otherwise circular surface of the dowel 16 in the region of the radial clamping region 126.
  • four equidistant, distributed over the circumference of the dowel in the region of the radial clamping region 124, four such projections 128 are provided, corresponding to an insert in a square bore 1 14 (see Figures 4 and 5).
  • the projections 128 In insert the dowel 116 into these holes 1 14, the projections 128 in the corners of the square of this bore 1 14. With a slight rotation of the dowel 1 16 in the bore 1 14 (for example, when screwing a screw into the threaded hole 122) rotate the projections 128 towards the sides of the square and cause the axial clamping.
  • An axial clamping element 130 adjoins the radial clamping region 124, towards the dowel mandrel 118, in this exemplary embodiment.
  • This axial clamping element 130 in this case comprises an axial clamping projection 132.
  • This axial clamping projection 132, 130 is formed in this example as a rectangular projection and has on its the dowel head 120 facing side a clamping surface 134 (see Figure 2). This clamping surface is inclined relative to the plane of the dowel head 120, which is indicated in Figure 3 by the angle ⁇ .
  • a captive 136 is disposed on one side, which has the shape of a barb. As can be seen in particular in FIG. 4, this captive device serves to prevent the plug 116 from falling out when the plug 116 is inserted into the bore 114.
  • an aperture 138 is provided in the dowel head 120.
  • This opening 138 is designed such that it is slightly larger than the projection of the axial clamping projection 132 on the dowel head 120. This ensures that parts of the tool, wel- che the undercut between the axial clamping projection 132 and the dowel head 120, through the opening 138 can reach through. In this way, by means of a simple on-to-tool and the complex structure of the dowel 1 16 can be made.
  • Figure 6 shows a plan view of the dowel head 120 when inserted into the bore 114 dowel 1 16, so a view similar to the view shown in Figure 5, but with a view parallel to the dowel axis.
  • the hole 1 14 is a square hole in one or more plate-shaped elements, for example, it can be assumed again that these plate-shaped elements can be an instrument panel 110 and a sheet 1 12. This makes it clear that the plate-shaped element may comprise one or more such elements, which are fixed by the dowel 116 and in which the dowel 16 is fixed.
  • FIG. 6 shows a position corresponding to the position in FIGS. 4 and 5, in which the dowel 16 is merely inserted into the bore 114, without hitherto causing a rotation.
  • both the axial clamping projection 132 and the radial widening 126 or the projection 128 point in the direction of the corner of the square bore 114.
  • FIG. 6 again only one quadrant of the anchor 116 is shown is, which is due to the symmetry of the anchor 116 is easy to complete a full dowel.
  • non-symmetrically constructed dowels 16 are also conceivable in which, for example, there is no mirror symmetry or axial symmetry with regard to the radial widenings 126, the axial clamping projections 132 and / or with regard to captive securing.
  • This torque causes a slight rotation of the plug 116 in the bore 114 in a clockwise direction.
  • the radial expansion 126 is pressed against the edge of the opening 114.
  • an axial clamping of the plug 116 is effected in the bore 114, and further rotation is prevented.
  • the axial clamping projection 132 is arranged on the side of the plate-shaped element 110, 112 opposite the dowel head 120. Upon rotation of the plug 1 16 in the bore 1 14, therefore, the corner of the axial clamping projection 132 is rotated in Figure 5 in the clockwise direction behind the opening 114 so that the corner with the plate-shaped element 1 10, 1 12 overlaps.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Connection Of Plates (AREA)
  • Dowels (AREA)

Abstract

L'invention concerne une cheville (116) pouvant être insérée dans un élément en forme de plaque (110, 112), notamment un tableau de bord (110) d'un véhicule à moteur. La cheville comprend un dôme (118) destiné à être introduit dans un alésage (114) à section transversale non circulaire, ledit dôme (118) présentant une section transversale sensiblement circulaire. La cheville présente également une tête (120) faisant saillie radialement au moins partiellement par rapport au dôme (118). Une section de serrage radial (124) est placée entre le dôme (118) et la tête (120) de la cheville, laquelle section présente au moins un élargissement radial (126). Un serrage peut être effectué avec un effort de serrage radial par rotation de la cheville (116) dans l'alésage (114).
PCT/EP2008/054313 2007-04-11 2008-04-10 Cheville de fixation de tableau de bord WO2008125576A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07105942 2007-04-11
EP07105942.2 2007-04-11

Publications (2)

Publication Number Publication Date
WO2008125576A2 true WO2008125576A2 (fr) 2008-10-23
WO2008125576A3 WO2008125576A3 (fr) 2009-04-09

Family

ID=39666026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/054313 WO2008125576A2 (fr) 2007-04-11 2008-04-10 Cheville de fixation de tableau de bord

Country Status (1)

Country Link
WO (1) WO2008125576A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109888459A (zh) * 2019-01-02 2019-06-14 武汉虹信通信技术有限责任公司 基站天线保型支撑结构、基站天线及装配方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109342A (en) * 1959-06-25 1963-11-05 George Goodman Ltd Plastic collapsible screw fastening device having auxiliary holding means
GB1116502A (en) * 1965-06-16 1968-06-06 Firth Cleveland Fastenings Ltd Improvements in and relating to fastening devices
GB1237063A (en) * 1969-01-07 1971-06-30 Carr Fastener Co Ltd Nut for assembly in an apertured support
FR2495244A1 (fr) * 1980-12-01 1982-06-04 Comet Perfectionnements aux dispositifs pour fixer des objets sur des toles accessibles d'un seul cote
DE10306538B4 (de) * 2003-02-15 2005-04-28 Itw Automotive Prod Gmbh & Co Spreizmutter
FR2881802B1 (fr) * 2005-02-07 2007-04-27 Itw Fastex France Soc Par Acti Cage pour dispositif de fixation et dispositif comportant une telle cage
DE102005032699B4 (de) * 2005-07-14 2007-08-23 Itw Automotive Products Gmbh & Co. Kg Befestigungsvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109888459A (zh) * 2019-01-02 2019-06-14 武汉虹信通信技术有限责任公司 基站天线保型支撑结构、基站天线及装配方法
CN109888459B (zh) * 2019-01-02 2020-09-04 武汉虹信通信技术有限责任公司 基站天线保型支撑结构、基站天线及装配方法

Also Published As

Publication number Publication date
WO2008125576A3 (fr) 2009-04-09

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