Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
  • B29C45/006—Joining parts moulded in separate cavities
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
  • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
  • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
  • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
  • B29C65/16—Laser beams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
  • B29C65/562—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using extra joining elements, i.e. which are not integral with the parts to be joined
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
  • B29C66/112—Single lapped joints
  • B29C66/1122—Single lap to lap joints, i.e. overlap joints
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/304—Joining through openings in an intermediate part of the article
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
  • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
  • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
  • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
  • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/3055—Cars

Definitions

• the present invention relates to the field of motor vehicles, including parts for the automotive industry comprising at least a plastic part.
• the invention relates more specifically to a part to report, particularly by welding, on a bodywork element.
• the part to be fixed may be a support for a functional body of the vehicle, such as a sensor, or a reinforcement such as a spoiler reinforcement attached to an outer spoiler surface.
• Known solutions use rivets, screws, snaps, and especially gluing or welding.
• two pieces made from the same material (or from compatible materials) and of complementary shape do not always have the same properties of shrinkage and deformation. 'expansion. Slight geometric variations between these two pieces exist. Indeed, the presence of ribs on the reinforcing piece, while the visible part is smooth, and the presence of technical elements only on the reinforcing piece are factors that can generate these slight geometric variations. These geometric variations lead in places to a lack of contact between the two parts, which results in molding defects.
• the visible part and the part to be reported are made of materials having different expansion coefficients, then a differential expansion may occur during assembly, or after, when using the vehicle assembly. As a result, stresses appear at the weld points, which can lead to deformation or even separation of the parts.
• the invention aims to overcome these disadvantages by providing a fastener of a first piece of a plastic vehicle with a second part of a motor vehicle plastic, the fastener comprising:
• At least one bearing part capable of compressing the first piece between the support part and the second part
• the fastener element according to the invention it is possible to assemble two pieces of motor vehicles while retaining the possibility of leaving a game between them, this game to confer a freedom of movement between the two rooms. In other words, it is possible to release the two pieces of the obligation of continuous contact with each other through the use of one or more fasteners according to the invention.
• the fastening portion of the fastener is a part intended to be fixed with the second part on which is pressed the first part, while the bearing portion of the fastener is intended to come abut against the first piece, and more precisely against a portion of the surface of the first piece that is not facing the second piece, so as to create an irreversible assembly.
• the fixing element In the final assembled position, the fixing element is fixed to the second part and bears on the first part, so that the latter is wedged between the second part and the bearing portion of the fastener.
• the connection between the fixing part and the bearing portion provided by the elbow-shaped connection portion provides the fastener with a geometry and a deformation capacity which makes it possible to compensate for both the geometric variations and, where appropriate, the differential expansion.
• first elbow and the second elbow are chosen so that the fixing portion and the bearing portion each form a surface locally located in a substantially different plane.
• the fixing portion forms a surface which is locally in a plane, this plane being substantially different from the plane in which is locally a surface formed by the support portion.
• the first bend and the second bend form alternating-internal angles with respect to a plane which directly connects the attachment portion and the support portion.
• a plane can be formed by the connecting part, itself, when the latter is flat.
• the fastening element is a S-shaped or Z-shaped profile ensuring that its support portion and its attachment portion are not located at the same level, which ensures a better fixation between the two parts. of motor vehicles with regard to the geometric variations and, where appropriate, the differential expansion previously mentioned.
• the fixing portion is intended to be fixed on one side of the second part which will not be visible from outside the vehicle, once it assembled.
• the element comprises two support portions disposed on either side of the fixing portion.
• the fastener element has a U-shape whose edges are both flared and extended, the breaking force needed to disassemble the two parts being increased, which provides additional security.
• the fastening portion forms a plane parallel to a longitudinal axis of the fastener and the bearing portion forms a plane strictly parallel to the plane of the fastening portion.
• the fixing portion and the support portions form planes both parallel to the longitudinal axis of the fastener element and not coincident with each other, which implies the presence of a difference in level between these two planes, thus making it easy to connect two pieces, or two portions of parts, of vehicles that have flat surfaces.
• the fixing portion has a curved shape.
• the fixing portion of the fastener element has a shape that can be complementary to that of a vehicle part of rounded shape.
• Rounded vehicle parts are increasingly used in the automotive industry. Therefore, the fastening element according to this variant of the invention allows to assemble two motor vehicle parts, at least one of which has a rounded shape.
• the invention also relates to an assembly of a motor vehicle part made of plastic material and a fixing element of two plastic vehicle parts, according to any of the previously presented variants.
• the workpiece and the fastening element are in one piece and connected by at least one breakable part, intended to break under the effect of a torsional stress and / or a stress of bending.
• the part and the fastener can be manufactured at the same time, which facilitates the manufacturing process and automation of this process. Subsequently, the decoupling for assembly with a second part is also facilitated, and this, thanks to the programmed breakage of the breakable part which connects the first part and the fastener. It is therefore possible to form one or more breakable parts which are sure they will break from the application of a force threshold value on one or more parts of the whole in one piece (first breakable part-part-fixing element), for example from a predetermined value of a rotation torque.
• the part has an orifice in which is introduced the fixing portion of the fastener.
• the room is one or more orifices that allow the positioning of one or more fasteners. Therefore, the fastening portions of the fasteners positioned in the orifices of the workpiece can be brought into contact with the second workpiece in order to be fixed thereto, by any means known to those skilled in the art. Therefore, it is not necessary, in this variant of the invention, to provide assembly areas between the fastener element and the second vehicle part, at the periphery of the first vehicle part. In addition, it is also possible to arrange this or these holes so as to improve the distribution of forces implemented during and after assembly between the two vehicle parts. In other words, the final assembly between the two parts and the distribution of forces implemented are improved.
• the fastening element and a portion of the part, at the periphery of the orifice are made of a material different from that of the rest of the workpiece.
• the fastening element is made in one piece with the part within its orifice, it is permitted to make the fastening element, the portion of the workpiece periphery 1 '. orifice and the breakable parts connecting them, in the same first material.
• the rest of the piece can be made of another material, compatible with the first material used, which has advantageous properties with respect to the different functions of this part of the first part.
• the assembly according to this variant of the invention makes it possible at the same time to facilitate its production and to make it possible to combine the properties of different materials.
• the piece comprises at least one limit stop of the fastening element.
• "Stroke" of the fastening element means, for example, a rotational movement of the fastening element which makes it possible to detach the fastening element from the part by virtue of the breakable parts, this rotational movement being prolonged until the support portions of the fastening element are positioned above the first part, in contact with the stops.
• the fixing element is not released between the moment it is detached from the first part and the moment when it is placed in position to be fixed to the second part;
• the motor vehicle part is a reinforcement part of a bodywork element
• the fastening element passes through the orifice
• the assembly further comprises a bodywork element; the fixing part of the fastening element is assembled to one face of the bodywork element intended to be invisible from the outside of the vehicle;
• the assembly further comprises a polymer layer disposed between the workpiece and the bodywork element, in particular a layer of polymer compatibilizing with the material of the fixing element and with the material of the bodywork element.
• the invention also relates to a method of assembly between a first part of a motor vehicle and a second part of a motor vehicle, the first part and the second part being made of plastic, the method comprising the following steps:
• the uncoupling step is performed by exerting a torsional stress and / or a bending stress on the breakable part
• the decoupling step and the assembling step are at least partially concomitant.
• a painting step of the second part is preferably performed before the assembly step;
• the assembly step is performed by at least one method selected from: gluing, direct ultrasonic welding, laser welding, vibration welding;
• the molding step is a bi-injection molding step, the fixing element and a portion of the first part being made in a material different from that of the rest of the first part;
• the material of the fastener and the portion of the first part is a material compatible with the material of the second part.
• the first piece and the second piece are chosen from one of the following pairs: polypropylene (hereinafter "PP") and PP; Polycarbonate / Acrylonitrile Butadiene Styrene (hereinafter "ABS / PC”) and acrylonitrile styrene acrylate (hereinafter "ASA”); ABS / PC and ABS / PC; ABS / PC and acrylonitrile butadiene styrene (hereinafter "ABS", poly (methyl methacrylate) (hereinafter “PMMA”) and ASA, PMMA and ABS / PC, PMMA and ABS, polycarbonate (hereinafter "PC”) ) and ASA, PC and ABS / PC, PC and ABS, ABS / PC and PC, Polycarbonate / Polyethylene Terephthalate (hereinafter "PC / PET”) and ASA, Polycarbonate / Polyethylene Terephthalate (
• the first piece is a reinforcing piece and / or the second piece is a body part.
• FIG. 1A is a diagram illustrating a fastening element according to the invention
• FIGS. 1B, 1C and 5 are diagrams each illustrating an assembly variant of an assembly according to any one of the embodiments of the invention with a second part of a motor vehicle;
• FIG. 2 is a diagrammatic section along the sectional plane II-II of FIG. 1B;
• FIG. 3 is a diagram illustrating an assembly of a vehicle part and a fastening element according to a first embodiment of the invention
• FIG. 4 is a diagram illustrating an enlargement of the framed area of the assembly of Figure 3, before assembly with a second part of a motor vehicle;
• FIG. 6 is a diagram illustrating an assembly of a vehicle part and a fastening element according to a second embodiment of the invention
• FIG. 7 is a diagram illustrating an enlargement of the framed zone of the assembly of FIG. 3.
• This assembly 1 is intended to allow the assembly of the first part 2 and a second part of a motor vehicle 4.
• the fastening element 3 comprises a fastening portion 31 which is able to be fixed to the second part 4.
• the fastening element 3 also comprises two bearing parts 32 arranged in on either side of the fixing part 31 and able to compress the first part 2 between the bearing parts 32 and the second part 4.
• the fixing element 3 comprises two connecting parts 33 which each connect one end of the fastening portion 31 and one end of one of the bearing portions 32, each of the connecting portions 33 forming a first bend 34 with the attachment portion 31 and a second bend 35 with the portion of corresponding support 32.
• the fixing portion 31 forms a surface 311 adapted to be fixed with a portion of the surface 41 of the second part 4 and the bearing portions 32 form lugs adapted to compress the first part 2 to the second room 4.
• Fixing between the fixing portion 31 and the second part 4 may be direct, as is the case for the assembly variants shown in FIGS. 1B, 1C, 2 and 4, or indirectly, as shown in FIG. is the case for the assembly variant shown in Figure 5.
• This attachment whether direct or indirect, can be achieved by any suitable means and known to those skilled in the art.
• such methods can be gluing, direct ultrasonic welding, laser welding or vibration welding.
• the fastening and support portions 32 are flat surfaces and extend parallel to a longitudinal axis A.
• the fastening portion 31 forms a plane P1 parallel to the longitudinal axis A (see Figure 1A).
• the two bearing portions 32, arranged on either side of the fixing portion 31, form a plane P2 that is strictly parallel to the plane P1 of the fixing portion 31.
• the planes P1 and P2, formed respectively by the fastening portion 31 and the bearing portions 32 are non-coinciding planes.
• first elbows 34 and second elbows form alternating-internal angles with respect to the corresponding connecting portions 33, thus conferring on the fastening element 3 a U-shape with flared and extended edges.
• each of the two pairs formed of a first elbow 34 and a second elbow 35 imparts to the fastener element a S-shaped or Z-shaped portion ensuring that the bearing portion 32 and the fixing portion 31 are not located at the same level.
• the fixing portion and the support portions may be non-planar surfaces. Therefore, P2 and P1 plans are not defined.
• the fixing portion may, for example, be of curved shape and thus allow an assembly with a corresponding rounded vehicle part.
• the fastening element positioned near the position in which it is subsequently attached to the second room.
• the shape of the fastener can be adapted for each attachment point, without having to manage different component references. Logistics on the assembly line is simplified and mechanical stresses can be optimized for each attachment point.
• the assembly method as described in the present invention provides the advantage of easily guaranteeing good indexing between the fastener and the second part.
• the first part 2 is a reinforcing member and the second part 4 is a bodywork element that the first part 2 reinforces.
• the attachment portion 31 is attached to the second piece 4, on its surface 41 which is not intended to be visible to end users, once the vehicle fully assembled.
• the support portions 32 of the fastening element 3 are intended to bear against a portion of the peripheral part 2 to the orifice 21 of rectangular shape, in order to apply a compressive force on this portion of the first part 2.
• the fixing portion 31 is attached to a portion of the face 41 of the second part 4, by any suitable method known to those skilled in the art, the part 2 is held in the locked position by the bearing parts 32.
• locked position means a locking of the first part 2 with a possibility of play between the first part 2 and the second part 4.
• the element fixation 3 thus makes it possible to absorb the resulting forces of contrary movements of the two parts 2, 4.
• the orifice 21, present within the first part 2 has any suitable geometric shape so that the part of Adjusting fixturing 31 of the fastening element 3 is accessible and so that its bearing parts 32 block the first part 2, after assembly with the second part 4.
• the fixing element 3 is dimensioned to pass through the orifice 21.
• the fixing element 3 is made so that the face 311 of the fastening portion 31, intended to be assembled with a portion of the surface 41 of the second piece 4, is approximately flush with the surface 22 of the first piece 2, located next to of surface 41 of the second 4. More specifically, and as shown in Figure 2, when the thickness e of the first part 2 is equal to the measurement d, corresponding to the difference in level between the fixing portion 31 and the bearing portions 32, then the surface 311 of the fixing portion 31 is strictly flush with the surface 22 of the first piece 2.
• the first piece 2 and the second piece 4 are in contact with each other, with a minimum clearance between they.
• the thickness e of the first part 2 is greater than the measurement d, then the bearing parts 32 and / or a portion of the part 4 are stressed after assembly between the fixing part 31 and the second part 4, which implies a spring effect at the support portions 32. Therefore, the support portions 32 strongly press the first part 2 against the second part 4, thus eliminating any play between the two parts.
• the thickness e of the first part 2 is smaller than the measurement d, then a play is present between the first part 2 and the second part 4, after assembly of the fastening part 31 with the second part 4, this game to compensate for opposite movements of the two parts 2, 4, relative to each other.
• the first part comprises, within its peripheral portion to the orifice, one or more end stops that allow to properly dispose and / or stop the rotation of the element. fastening after separation (breakage of the breakable part), and this, in order to fix it with the second part.
• the stop may be in the form of a simple rib, a hook, or a clip with a flexible tab for clipping the fastener in position before attaching it to the second piece.
• the fastening element 3 is formed even within the first part 2, more precisely, within its orifice 21 and is connected to the first piece 2 by means of two breakable parts (not shown).
• the correct positioning of the fastening element 3 for its attachment with the second part 4 is easier to obtain, because of the presence of the fastening element 3 in the appropriate zone of the first part 2.
• the fastening elements 3 according to this embodiment must necessarily be rotated before fixing the two parts 2, 4, given their insufficient length to allow attachment such as that shown in Figure 1 C.
• the fastening element 3 is always formed in one piece with the first part 2, outside of the latter and is connected to it only by a single scored part (not shown).
• the efforts required to separate the fastening element 3 and the first part 2 are less important than those required in the first embodiment.
• the support portions 32 of the fastening element 3 are intended to be positioned on the surface of the first part 2 which is not not facing the surface 41 of the second part 4. Such positioning is visible in Figures 1B, 1C, 2 and 5 and provides access to the surface 311 of the fastening portion 31 on the side of the surface 22 of the first part 2, located opposite the face 41 of the second part 4.
• the fixing portion 31 can be fixed directly to the second part 4 thereby causing the first part 2 to be locked by the bearing parts 32.
• the assembly 1 may also comprise a layer of compatibilizing polymer 5 with the materials of the fixing element 3 and of the second component 4.
• the fixing part 31 can be fixed directly on the polymer layer 5.
• the fixing element 3 is used and the assembly 1 is formed as follows.
• the first piece 2 and the fastening element 3 are molded in one piece, these two elements being connected to each other by means of at least one breakable part (not shown).
• the fastening element 3 and the first part 2 are detached by exerting a torsional stress. and / or a bending stress on the breakable part.
• the fastening element 3 is placed on the first part 2 so that its fastening part 31 passes through the orifice 21 and its support parts 32 are positioned facing the peripheral portion of the orifice 21.
• P2 plane formed by the supporting part or parts 32

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Structural Engineering (AREA)
• Transportation (AREA)
• Architecture (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Electromagnetism (AREA)
• Toxicology (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61913239

Family Applications (1)

Country Status (4)

Family Cites Families (5)

• 2017
  • 2017-11-13 FR FR1760654A patent/FR3073445B1/fr active Active
• 2018
  • 2018-11-09 CN CN201880075659.XA patent/CN111372746B/zh active Active
  • 2018-11-09 EP EP18800167.1A patent/EP3710217A1/de active Pending
  • 2018-11-09 WO PCT/EP2018/080839 patent/WO2019092221A1/fr unknown

Also Published As

Similar Documents

Legal Events