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
  • F16B37/00—Nuts or like thread-engaging members
  • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
  • F16B37/044—Nut cages

Definitions

• the present invention relates to a fastening arrangement of a motor vehicle element and more particularly to an arrangement in which this element is mounted on a structural means of the vehicle via a housing which is integral with this structural means and which forms a cage in which a fixing nut is mounted with clearance, this nut being able to collaborate with a fastening screw for mounting the element, so that the play of the nut makes it possible to catch the dispersions of this assembly.
• a major disadvantage of the state of the art is that the nut and the cage are bonded by this bath, and that when screwing the screw in the nut, a significant effort is required to take off these two elements, this which can cause a sudden blow between the nut and the screw and damage the thread.
• One of the objectives of the invention is therefore to propose a fixing arrangement of the type described above which improves the mounting of the element on the structural means, for example the mounting of the seat on the floor, and which in particular minimizes the effort required for screwing.
• the present invention aims also inexpensive and compact.
• the invention proposes a fixing arrangement of the type previously described, characterized in that at least one of the faces of the nut is in contact with the cage, and in that this contact face has rib elements.
• At least one face of the cage has a stamping on which rests rib elements of the nut
• the nut has a substantially rectangular shape and in that the rib elements form the diagonals, the cage comprises on the one hand a support element forming the lower part of the cage and on which the movable nut is positioned, and on the other hand a reinforcing element forming the upper part of the cage, this reinforcing element having an orifice adapted to allow the passage to the fixed fastening screw of the seat, the dimensions of the movable nut are such that this nut is prevented from rotating by at least one wall of the cage formed by the reinforcing member and / or the support member,
• At least one wall of the cage formed by the reinforcing element and / or by the support element has rib elements.
• the invention aims to also protect a motor vehicle comprising a seat mounted via at least one fastening device according to the invention.
• FIG. 1 is a perspective view of the front left cockpit of a motor vehicle provided with the fixing device according to the invention, prior to mounting the left front seat,
• FIG. 2 is a perspective view of the seat cross members on which the fastening devices according to the invention are mounted;
• FIG. 3 is a first schematic representation of various elements of the fixing box according to the invention.
• FIG. 4 is a second schematic representation of various elements of the fastening box according to the invention.
• FIG. 5 is a schematic representation of the movable nut of the fixing housing according to the invention.
• FIG. 1 shows a left half of the central base 1 of a vehicle, delimited at the outside of the vehicle by the left sill 2 and inward of the vehicle by a tunnel 3.
• the The invention is also applicable to the right half of the central bed.
• only the left half and the attachments of the corresponding seat will be described.
• This central base is reinforced by two crosspieces central floor 4 and 5, which are welded to the floor 6. These two cross members 4 and 5, structural means of the vehicle, allow the attachment of a seat.
• two front fasteners 7 of the seat are mounted on the structural means of the vehicle formed by the front floor cross member 4. and two rear fasteners 8 of this seat are mounted on the structural means of the vehicle formed by the rear floor cross member 5.
• the front fasteners 7 and rear 8 of the seat located on the side of the tunnel 3 are formed by a set without clearance. It is then preferable that the front and rear fasteners 8 of the seat located on the side of the flap 2 have a mounting set to take in account the dispersions induced during the positioning of the seat on the structural elements 4 and 5 of the vehicle.
• This mounting clearance is provided by the presence of a movable nut 40 in a cage 20, formed in a housing 10.
• this housing 10 can be attached to a structural means 4, 5 of the vehicle, or the casing 10 and the structural means 4, 5 can be made of a single piece.
• an insert box 10a is used for the seat fasteners on the front floor crossmember 4, and the rear floor crossmember 5 incorporates a fastening box 10b. It will be understood that this provision could be reversed, or that four reported cases 10a could be used.
• each configuration is according to the present invention since the outer fasteners of the seat, close to the flap 2, are fasteners having a mounting set.
• a cage 20 is disposed within the fixing housing 10, this housing is integrated into the transom or attached to the crossmember.
• a cage 20 is positioned in a substantially longitudinal direction, welded to the front floor beam 4 or rear 5, and at least covered by the fixing housing 10 corresponding to this cross member.
• FIGS 3 and 4 show an embodiment of a cage 20 according to the invention.
• a support element 21 forms the lower part of the cage 20. This support element 21 is obtained by the multiple folding of a blade so that the support element 21 has a stepped shape.
• a first ninety-degree fold determines the connection between the main zone 22 of the support member 21 and a first fallen edge 23, descending with respect to the main zone and forming a first fastening tab.
• a second ninety-degree fold determines the connection between the end, opposite the first dropped edge 23, of the main zone 22 of the support member 21 and a second fallen edge 24, rising relative to the main zone 22.
• a third ninety-degree fold determines the connection between the second dropped edge 24 and a second fastening tab 25, substantially parallel to the main zone 22 of the support member 21.
• Grooves 26 are formed in the support member 21 at each folding edge, so that the right angle of these folds are consolidated.
• This cage 20 is formed by a reinforcing element 27, which at its ends has complementary shapes of the support member 21, so that the support member 21 and the reinforcing member 27 are welded at the fixing lugs 23 and 25 of support member F 21.
• the cage 20 formed by the two parts has a hollow space 28 housing in which a nut 40 is movable.
• the main zone 22 of the support element 21 corresponds to the lower part of the housing 28 of the movable nut 40.
• This zone 22 has an orifice 29 in which a collar 41 of the nut 40 is positioned, this collar 41 being a cylindrical portion projecting from the base 42 of the nut 40.
• the orifice 29 of the main zone 22 is of greater diameter than the diameter of the neck 41 of the nut 40. A slight translation is thus authorized for the mobile nut 40, before the neck 41 of the nut 40 is blocked by the edge of the orifice 29.
• a hole 30 is provided in the reinforcing element 27 to allow passage to a fastening screw secured to the seat.
• the translational movement permitted of the movable nut 40 permits adjustment of the position of the nut 40 so that it is found under the hole 30 of the reinforcing member 27 and vertically above the screws. This adjustment makes it possible to catch up with the mounting dispersions of the seat and to be able to align the screw, the screw passage provided in the cage 20 and the movable nut 40 to enable the seat to be attached to the structural means 4 of the vehicle.
• the seat is provided with two rails on which it can slide. These rails are placed on the housings 10 and have bores so that the fastening screws can secure these rails to the fastening boxes 10.
• the seat is slid in its extreme front or rear end position, depending on whether the operator screws the rails seat on the rear or front housing.
• the dimensions of the movable nut 40 and the hollow space 28 provided between the support member 21 and the reinforcing member 27 are such that the nut 40 mobile can turn on itself, the faces 43 of the nut 40 used in this case in contact with the walls 31 of the cavity 28 formed by the support 21 and the element member 27.
• reinforcement 11 will understood that anti ⁇ rotation function can be achieved by a single contact between the nut 40 and a wall 31 of the reinforcing element 27, or, in a variant that allows the cage 20 to better withstand the torque forces of the screwing, the anti-rotation function can be achieved by a double contact between the nut 40 and a wall of the reinforcing element 27 and a wall 31 of the support element 21.
• the nut 40 has a substantially rectangular shape. It is more precisely formed of a substantially parallelepiped base 42, one face 44 of which is provided with a cylindrical neck
• this neck 41 has a suitable diameter to allow a slight translational movement of the nut 40 relative to the support member 21 of the cage 20. It presents also a height sufficient to ensure a translation stop when the neck 41 comes into contact with the orifice 29 formed in the support member 21 of the cage 20.
• Rib elements 45 are disposed on at least the face 44 of the nut 40 which rests on the main zone 22 of the support member 21. These rib elements 45 allow to generate only a minimal contact surface between the nut mobile 40 and the cage 20. The passage of the vehicle in a cataphoresis bath then causes the bonding only a contact strip 46 between the nut 40 and the cage 20, and the operator carrying out the assembly of the seat can thereafter take off these two elements by the simple action of screwing in the fixing housing 10. The fact that the nut 40 and the cage 20 are glued only by the contact strips 46 can maintain, after cataphoresis, the nut 40 in a plane substantially parallel to the plane of the main zone 22 of the 20. This avoids a biasing of the fixing screw in the nut 40 during assembly.
• rib elements 45 can be positioned on other faces of the nut 40, and in particular the faces facing the walls 31 of the cage 20.
• second rib members 33 may be carried by the walls 31 of the cage 20, the objective of a lower resistance to take-off after cataphoresis remaining the same.
• these ribs 45 form the diagonals of the movable nut 40. It will be understood that they could also be parallel or perpendicular. As shown in Figures 4 and 5, an arrangement of the ribs 45 diagonally can be taken in combination with a stamped 32 made on the support member 21 towards the interior of the hollow space

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Seats For Vehicles (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34946766

Family Applications (1)

Country Status (4)

Families Citing this family (5)

Family Cites Families (12)

• 2004
  • 2004-06-15 FR FR0451180A patent/FR2871535B1/fr not_active Expired - Fee Related
• 2005
  • 2005-06-02 EP EP05776392A patent/EP1759122A1/de not_active Withdrawn
  • 2005-06-02 WO PCT/FR2005/050413 patent/WO2006003337A1/fr not_active Application Discontinuation
  • 2005-06-02 JP JP2007516011A patent/JP2008502857A/ja active Pending

Non-Patent Citations (1)

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