FR2934238A1 - Frame assembling method for bicycle, involves fitting U-shaped shells with each other, assembling shells together by adhesive bonding, and gluing fine strip of foam to shells during assembling - Google Patents
Frame assembling method for bicycle, involves fitting U-shaped shells with each other, assembling shells together by adhesive bonding, and gluing fine strip of foam to shells during assembling Download PDFInfo
- Publication number
- FR2934238A1 FR2934238A1 FR0804231A FR0804231A FR2934238A1 FR 2934238 A1 FR2934238 A1 FR 2934238A1 FR 0804231 A FR0804231 A FR 0804231A FR 0804231 A FR0804231 A FR 0804231A FR 2934238 A1 FR2934238 A1 FR 2934238A1
- Authority
- FR
- France
- Prior art keywords
- shells
- assembling
- foam
- assembly
- bicycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K19/00—Cycle frames
- B62K19/02—Cycle frames characterised by material or cross-section of frame members
- B62K19/16—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly of plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K19/00—Cycle frames
- B62K19/18—Joints between frame members
- B62K19/22—Adhesive joints
Abstract
Description
l La présente invention concerne un principe constructif applicable aux cadres de vélos fabriqués avec des matériaux composites. Elle concerne tous types de vélos. The present invention relates to a constructive principle applicable to bicycle frames made of composite materials. It concerns all types of bicycles.
Les cadres de vélos en composite sont généralement fabriqués avec un assemblage de tubes et de noeuds qui relient les tubes entre-eux et introduisent les efforts extérieurs (guidon, selle et pédalier). Les tubes sont faits soit à partir de tresses ou d'enroulement filamentaire et sont par construction axisymétriques. Les fibres sont toutes orientées dans une direction proche de +/-45° par rapport à l'axe du tube. Une telle disposition ne représente pas un bon compromis car elle est idéale pour une sollicitation en torsion, alors que les tubes sont sollicités en traction/compression et en flexion. Composite bicycle frames are usually made with an assembly of tubes and knots that connect the tubes together and introduce the external forces (handlebar, saddle and pedal). The tubes are made either from braids or filament winding and are by axisymmetric construction. The fibers are all oriented in a direction close to +/- 45 ° with respect to the axis of the tube. Such an arrangement does not represent a good compromise because it is ideal for a stress in torsion, while the tubes are stressed in tension / compression and bending.
Les noeuds sont réalisés par drapage de tresses et de tissus. Ils sont massifs, car ils doivent assurer le cheminement des efforts entre les tubes. Compte tenu de la géométrie du cadre, il est difficile d'obtenir un champ de contraintes dans une direction particulière. The knots are made by draping braids and fabrics. They are massive because they must ensure the flow of effort between the tubes. Given the geometry of the frame, it is difficult to obtain a stress field in a particular direction.
On ne peut donc pas tirer profit des caractéristiques anisotropiques du composite qui demande à être orienté dans les directions des contraintes principales. We can not take advantage of the anisotropic characteristics of the composite that needs to be oriented in the main stress directions.
Cette disposition provoque une performance en masse et raideur qui n'est pas optimale. Elle implique également un nombre important de pièces élémentaires, et donc de 20 nombreux outillages. This provision causes mass performance and stiffness that is not optimal. It also involves a large number of elementary parts, and therefore many tools.
L'invention permet de remédier à ces inconvénients. Elle consiste à utiliser des tubes de section rectangulaire et à adapter le dessin du cadre pour réaliser l'ensemble du cadre grâce à seulement 3 éléments, deux demi-coquilles latérales et une contre pièce pour la 25 face interne des haubans arrière. Ces pièces s'emboîtent les unes dans les autres et sont collées au niveau des semelles des tubes. The invention overcomes these disadvantages. It consists of using tubes of rectangular section and to adapt the design of the frame to achieve the entire frame with only 3 elements, two side half-shells and a counterpart for the inner face of the rear shrouds. These pieces fit into each other and are glued to the soles of the tubes.
• Une telle disposition permet d'assurer une utilisation quasi-optimale des propriétés des matériaux en orientant les fibres majoritairement dans les 30 directions de contraintes principales.. Such an arrangement makes it possible to ensure an almost optimal use of the properties of the materials by orienting the fibers mainly in the principal stress directions.
• Une telle disposition permet d'améliorer le dessin des introductions d'efforts et d'éviter les sur-contraintes locales. • Such an arrangement makes it possible to improve the design of the introduction of efforts and to avoid local over-constraints.
35 • Une telle disposition permet de diminuer le nombre de pièces élémentaires.. 35 • Such an arrangement makes it possible to reduce the number of elementary pieces.
• Une telle disposition permet une grande simplicité des moules de fabrication qui sont des moules femelles en forme de U. • Such an arrangement allows a great simplicity of manufacturing molds which are U-shaped female molds.
40 • Une telle disposition permet un drapage facile des composites à l'intérieur des moules en U. 40 • Such an arrangement allows easy draping of the composites inside the U-shaped molds.
Selon les modes particuliers de réalisation : According to the particular embodiments:
45 • Les coquilles peuvent être réalisées en composite monolithique ou en sandwich. • Le raidissement des flancs des tubes peut se faire par des raidisseurs monolithiques, sandwich ou simplement par de la mousse. 45 • The shells can be made of monolithic composite or sandwich. • The stiffening of the flanks of the tubes can be done by monolithic stiffeners, sandwich or simply by foam.
2 Les figures 1 à 3 illustrent la réalisation d'un tel cadre de vélo. 2 Figures 1 to 3 illustrate the realization of such a bicycle frame.
En référence à la figure 1, le principe constructif consiste à construire des coques (1) et (2) qui s'emboîtent l'une dans l'autre. Chacune de ces coques est construite en matériau composite monolithique. Les tissus sont orientés à +/- 45° sur les flancs et des tissus à 0° sont ajoutés sur les semelles. Referring to Figure 1, the constructive principle is to build shells (1) and (2) which fit into one another. Each of these shells is constructed of monolithic composite material. The tissues are oriented at +/- 45 ° on the flanks and tissues at 0 ° are added on the soles.
L'assemblage se fait par collage des semelles l'une avec l'autre (4). The assembly is done by bonding the soles with each other (4).
En référence aux figures 1 et 2, une fine lame de mousse (3) collée d'abord à l'une des deux coques (2), puis à la deuxième (1) lors de l'assemblage (7), permet de positionner les deux coques l'une par rapport à l'autre. Cette mousse sert également à raidir et stabiliser l'âme de la poutre formée par l'assemblage. En référence à la figure 3, l'assemblage des haubans arrière se fait par collage (5) de la pièce formant la partie interne du hauban (8) dans la coque (2). Cette opération est à effectuer avant la fermeture des deux coques (7). With reference to FIGS. 1 and 2, a thin foam blade (3) glued firstly to one of the two shells (2), then to the second (1) during assembly (7), makes it possible to position the two hulls relative to each other. This foam also serves to stiffen and stabilize the soul of the beam formed by the assembly. Referring to Figure 3, the assembly of the rear shrouds is by gluing (5) of the part forming the inner part of the stay (8) in the shell (2). This operation is to be performed before closing the two shells (7).
20 Le principe constructif selon l'invention est particulièrement destiné à la fabrication de cadres en matériaux composites pour tous types de vélos. 15 The constructive principle according to the invention is particularly intended for the manufacture of composite material frames for all types of bicycles. 15
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0804231A FR2934238B3 (en) | 2008-07-25 | 2008-07-25 | CONSTRUCTION PRINCIPLE APPLICABLE TO FRAMES OF BICYCLES MADE OF COMPOSITE MATERIALS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0804231A FR2934238B3 (en) | 2008-07-25 | 2008-07-25 | CONSTRUCTION PRINCIPLE APPLICABLE TO FRAMES OF BICYCLES MADE OF COMPOSITE MATERIALS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2934238A1 true FR2934238A1 (en) | 2010-01-29 |
FR2934238B3 FR2934238B3 (en) | 2012-03-30 |
Family
ID=41600537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0804231A Expired - Lifetime FR2934238B3 (en) | 2008-07-25 | 2008-07-25 | CONSTRUCTION PRINCIPLE APPLICABLE TO FRAMES OF BICYCLES MADE OF COMPOSITE MATERIALS |
Country Status (1)
Country | Link |
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FR (1) | FR2934238B3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011053100A1 (en) * | 2011-08-30 | 2013-02-28 | Rehau Ag + Co | Two-wheeler frame, two-wheeler and method of manufacturing a bicycle frame |
-
2008
- 2008-07-25 FR FR0804231A patent/FR2934238B3/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011053100A1 (en) * | 2011-08-30 | 2013-02-28 | Rehau Ag + Co | Two-wheeler frame, two-wheeler and method of manufacturing a bicycle frame |
WO2013029788A1 (en) * | 2011-08-30 | 2013-03-07 | Rehau Ag + Co | Bicycle frame, bicycle and method for producing a bicycle frame |
US9422024B2 (en) | 2011-08-30 | 2016-08-23 | Rehau Ag + Co | Bicycle frame, bicycle and method for producing a bicycle frame |
Also Published As
Publication number | Publication date |
---|---|
FR2934238B3 (en) | 2012-03-30 |
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