FR2514717A3 - BICYCLE EQUIPMENT WITH MULTIPLICATION RAYS AND AERODYNAMIC PEDAL LEVER CRANKS - Google Patents
BICYCLE EQUIPMENT WITH MULTIPLICATION RAYS AND AERODYNAMIC PEDAL LEVER CRANKS Download PDFInfo
- Publication number
- FR2514717A3 FR2514717A3 FR8217290A FR8217290A FR2514717A3 FR 2514717 A3 FR2514717 A3 FR 2514717A3 FR 8217290 A FR8217290 A FR 8217290A FR 8217290 A FR8217290 A FR 8217290A FR 2514717 A3 FR2514717 A3 FR 2514717A3
- Authority
- FR
- France
- Prior art keywords
- plane
- crank
- multiplication
- hub
- rotation
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
- B62M9/105—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like involving front sprocket chain-wheels engaged by the chain, belt or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Gears, Cams (AREA)
Abstract
L'EQUIPEMENT SELON L'INVENTION FAIT INTERVENIR UNE COURONNE 1 PRESENTANT DES RAYONS 2 QUI CONVERGENT VERS UN MOYEU ET UNE MANIVELLE DE PEDALE 4 SOLIDAIRE DU MOYEU. CHAQUE RAYON 2 DE LA COURONNE 1 PRESENTE UNE SECTION EN PARALLELOGRAMME DONT DEUX COTES 20, 20 SONT PARALLELES AU PLAN DE ROTATION, ET DEUX AUTRES COTES 21, 21 SONT ORIENTES OBLIQUEMENT PAR RAPPORT A CE PLAN. CES COTES 21, 21 SONT A PEU PRES PARALLELES ENTRE EUX ET SE TROUVENT L'UN VERS LE SENS DE ROTATION ET L'AUTRE DANS LE SENS OPPOSE. L'INVENTION PERMET D'OBTENIR UNE APTITUDE MAXIMALE DE CES COMPOSANTS DANS L'AIR.THE EQUIPMENT ACCORDING TO THE INVENTION INVOLVES A CROWN 1 PRESENTING SPOKES 2 WHICH CONVERT TO A HUB AND A PEDAL CRANK 4 SOLID WITH THE HUB. EACH RADIUS 2 OF CROWN 1 SHOWS A PARALLELOGRAM SECTION OF WHICH TWO SIDES 20, 20 ARE PARALLEL TO THE ROTATION PLAN, AND TWO OTHER SIDES 21, 21 ARE OBLICALLY ORIENTED IN RELATION TO THIS PLAN. THESE DIMENSIONS 21, 21 ARE APPROXIMATELY PARALLEL WITH THEM AND ARE LOCATED ONE TOWARDS THE DIRECTION OF ROTATION AND THE OTHER IN THE OPPOSITE DIRECTION. THE INVENTION ALLOWS MAXIMUM SUITABILITY OF THESE COMPONENTS IN THE AIR.
Description
_ 1 7_ 1 7
Eguipement pour bicyclettes avec rayons de multiplication Equipment for bicycles with multiplication rays
et manivelles de pédale à sections aérodynamiques. and pedal cranks with aerodynamic sections.
L'invention concerne un équipement pour bicyclettes comprenant une multiplication ou couronne à plusieurs rayons et deux manivelles de pédale dont une est fixée aux rayons de la multiplication ou couronne ou fait corps The invention relates to equipment for bicycles comprising a multiplication or crown with several spokes and two pedal cranks, one of which is fixed to the rays of the multiplication or crown or body
avec ceux-ci.with these.
Selon les modes d'exécution connus, les équipements According to known embodiments, the equipment
pour bicyclettes n'offrent pas les caractéristiques aéro- for bicycles do not offer the aerodynamic characteristics
dynamiques ou de pénétration dans l'air qui seraient souhaitable en vue d'obtenir le rendement maximal de l'effort du cycliste En outre, les équipements connus ont généralement l'inconvénient de présenter, à l'endroit which would be desirable in order to obtain the maximum efficiency of the cyclist's effort. Moreover, the known equipment generally has the disadvantage of presenting, in the place
de la zone de jonction de la manivelle à la multiplica- from the junction zone of the crank to the multiplica-
tion ou couronne, un moyeu ou partie de forme cylindrique ou similaire qui fait saillie nettement vers l'extérieur or crown, a hub or portion of cylindrical or similar shape that protrudes substantially outwardly
relativement au plan contenant les rayons. relative to the plane containing the rays.
Au contraire, le but de l'invention est de proposer un équipement pour bicyclettes de conformation telle que les rayons de la multiplication aussi bien que chaque On the contrary, the object of the invention is to provide equipment for conforming bicycles such as the rays of the multiplication as well as each
manivelle présentent des sections polygonales qui per- crank handle have polygonal sections that allow
mettent l'aptitude maximale à la pénétration de ces com- put the maximum aptitude for the penetration of these
posants dans l'air.posing in the air.
Un autre but de l'invention est de proposer un équi- Another object of the invention is to propose an equi-
pement pour bicyclettes dans laquelle la zone de jonction des rayons de la multiplication ou couronne avec la manivelle correspondante présente une surface sphérique ou en tout cas convexe continue pour éliminer toute saillie ou tout obstacle importants et rendre le groupe for bicycles in which the junction area of the spokes of the multiplication or crown with the corresponding crank has a continuous spherical or continuous convex surface to eliminate any significant protrusion or obstacle and to make the group
plus aérodynamique.more aerodynamic.
Un autre but de l'invention est de proposer un équi- Another object of the invention is to propose an equi-
pement pour bicyclettes dans lequel la manivelle de pé- for bicycles in which the crank handle
dale, lorsqu'elle est fixée à la multiplication ou cou- when it is fixed at the multiplication or
ronne, présente une extrémité encastrée dans la zone de well, has an embedded end in the
convergence des rayons de la multiplication ou couronne. convergence of the rays of multiplication or crown.
Des modes de réalisation de l'invention seront dé- Embodiments of the invention will be disclosed.
crits ci-après, à titre d'exemples non limitatifs, avec référence aux dessins annexés sur lesquels: -2- les figures 1 et 2 montrent deux perspectives hereinafter given by way of non-limiting example with reference to the accompanying drawings, in which: FIGS. 1 and 2 show two perspectives
respectivement par l'avant et par l'arrière de l'équi- respectively from the front and the rear of the equi-
pement la figure 3 est une vue latérale; la figure 4 est une coupe transversale de la ma- nivelleet la figure 5 est une coupe transversale de l'un Figure 3 is a side view; FIG. 4 is a cross-section of the scale and FIG. 5 is a cross-section of one
des rayons de la multiplication ou couronne. rays of multiplication or crown.
L'équipement considéré comprend une multiplication The equipment under consideration includes a multiplication
ou couronne 1 présentant plusieurs rayons 2 qui conver- or crown 1 having several radii 2 which converge
gent vers une partie centrale ou moyeu 3 duquel towards a central part or hub 3 of which
part la manivelle de pédale 4 La multiplication ou cou- hand pedal crank 4 Multiplication or
ronne 1 peut être simple ou double et peut être fixée sur les rayons 2 comme le représente le dessin ou bien 1 may be single or double and may be attached to the spokes 2 as shown in the drawing or
former un ensemble avec ceux-ci.form a set with these.
De façon analogue, la manivelle 4 peut être fixée à la partie centrale ou moyeu 3 comme on l'a représenté Similarly, the crank 4 can be fixed to the central portion or hub 3 as shown.
ou bien faire corps avec les rayons. or to make body with the rays.
Quand la manivelle 4 est montée et fixée, son ex- When the crank 4 is mounted and fixed, its ex-
trémité 4 ' reliée à la multiplication ou couronne 1 est 4 'tremity connected to the multiplication or crown 1 is
encastrée dans la partie centrale ou moyeu 3 o conver- recessed in the central part or hub 3 o conver-
gent les rayons 2 En tous cas, la surface frontale de cette partie centrale ou moyeu 3 a une forme sphérique continue ou en tout cas convexe comme le montrent en In any case, the front surface of this central portion or hub 3 has a continuous spherical shape or in any case convex as shown in FIG.
particulier les figures 1 et 3.particularly Figures 1 and 3.
Toujours selon l'invention, chaque rayon 2 de la Still according to the invention, each spoke 2 of the
multiplication ou couronne présente une section en pa- multiplication or crown has a section in
rallèlogramme comme celle que représente la figure 1, présentant essentiellement deux côtés opposés 20, 20 à peu près parallèles au plan o s'effectue la rotation du groupe et deux autres côtés opposés 21, 21 coupant ce plan sous un angle approprié et en tout cas différent a program similar to that shown in Figure 1, having essentially two opposite sides 20, 20 substantially parallel to the plane o is carried out the rotation of the group and two other opposite sides 21, 21 intersecting the plane at an appropriate angle and in any case different
de l'angle droit.from the right angle.
De son côté, la manivelle 4 présente une section polygonale irrégulière voir figure 4 avec deux côtés , 40 à peu près parallèles au plan de rotation de la manivelle et deux autres côtés opposés 4 i, 41 qui se -3 trouvent l'un vers le sens de rotation et l'autre du c 8 té opposé et qui coupent tous deux le plan mentionné For its part, the crank 4 has an irregular polygonal cross-section, see FIG. 4 with two sides, 40 approximately parallel to the plane of rotation of the crank, and two other opposite sides 4, 41 which are located one towards the other. direction of rotation and the other of the opposite side and which both intersect
sous un angle approprié, mais différent de l'angle droit. at an appropriate angle, but different from the right angle.
La conformation générale du moyeu à surface sphé- The general conformation of the spherical surface hub
S rique ou convexe et les sections particulières des Seric or convex and the particular sections of
rayons 2 et de la manivelle permettent une grande apti- 2 spokes and the crank handle enable great
tude à la pénétration dans l'air, qui ne peut pas être study to the penetration into the air, which can not be
obtenue autrement, ce qui favorise un plus grand rende- otherwise, which favors a greater return
ment de l'effort exercé par le cycliste. the effort exerted by the cyclist.
25147 1 725147 1 7
_ 4 __ 4 _
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT707481U IT8107074V0 (en) | 1981-10-16 | 1981-10-16 | BICYCLE CRANKSET WITH SPROCKETS AND AERODYNAMIC SECTION CRANKS. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2514717A3 true FR2514717A3 (en) | 1983-04-22 |
FR2514717B3 FR2514717B3 (en) | 1983-08-05 |
Family
ID=11123964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8217290A Granted FR2514717A3 (en) | 1981-10-16 | 1982-10-15 | BICYCLE EQUIPMENT WITH MULTIPLICATION RAYS AND AERODYNAMIC PEDAL LEVER CRANKS |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR2514717A3 (en) |
GB (1) | GB2109892B (en) |
IT (1) | IT8107074V0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2548998A1 (en) * | 1983-07-11 | 1985-01-18 | Shimano Industrial Co | PEDALIER FOR A BICYCLE |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20061549A1 (en) | 2006-08-03 | 2008-02-04 | Campagnolo Srl | ASSEMBLY OF RIGHT PEDESTAL FOR BICYCLE AND RELATED PEDIVELLA AND CORONA |
ITMI20061550A1 (en) | 2006-08-03 | 2008-02-04 | Campagnolo Srl | ASSEMBLY OF THE RIGHT PEDESTAL FOR BICYCLE AND ITS CRANKCASE |
DE102010027228B4 (en) * | 2009-11-04 | 2021-12-09 | Sram Deutschland Gmbh | Multiple sprocket arrangement for bicycles |
-
1981
- 1981-10-16 IT IT707481U patent/IT8107074V0/en unknown
-
1982
- 1982-10-01 GB GB08228043A patent/GB2109892B/en not_active Expired
- 1982-10-15 FR FR8217290A patent/FR2514717A3/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2548998A1 (en) * | 1983-07-11 | 1985-01-18 | Shimano Industrial Co | PEDALIER FOR A BICYCLE |
Also Published As
Publication number | Publication date |
---|---|
GB2109892A (en) | 1983-06-08 |
FR2514717B3 (en) | 1983-08-05 |
IT8107074V0 (en) | 1981-10-16 |
GB2109892B (en) | 1985-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse | ||
DA | Annulment of decision of lapse |