FR2498715A2 - Variable length pedal crank for bicycle - has crank arm fixed to roller bearing travelling in oval channel cut into crank shaft casing - Google Patents
Variable length pedal crank for bicycle - has crank arm fixed to roller bearing travelling in oval channel cut into crank shaft casing Download PDFInfo
- Publication number
- FR2498715A2 FR2498715A2 FR8101431A FR8101431A FR2498715A2 FR 2498715 A2 FR2498715 A2 FR 2498715A2 FR 8101431 A FR8101431 A FR 8101431A FR 8101431 A FR8101431 A FR 8101431A FR 2498715 A2 FR2498715 A2 FR 2498715A2
- Authority
- FR
- France
- Prior art keywords
- crank
- slide
- bicycle
- lug
- variable length
- 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.)
- Pending
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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
- B62M3/00—Construction of cranks operated by hand or foot
- B62M3/02—Construction of cranks operated by hand or foot of adjustable length
- B62M3/04—Construction of cranks operated by hand or foot of adjustable length automatically adjusting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
- Transmission Devices (AREA)
Abstract
Description
La présente demande de certificat d'addition a la demande de brevet de base n" 80.22758, déposée le 24 octobre 1980, concerne des perfectionnements aux manivelles, notamment pour engins mûs par pedales. The present application for a certificate of addition to the basic patent application No. 80.22758, filed on October 24, 1980, relates to improvements to the cranks, in particular for machines driven by pedals.
Dans la demande de brevet principal, on a décrit une manivelle de longueur variable. facile realiser, qui est constituée d'une coulisse dans laquelle un coulisseau effectue un mouvement alternatif rectiligne. Un roulement a billes, forme d'un anneau interieur et d'un anneau extérieur. entre lesquels circulent des billes, est assujetti au boîtier du pédalier et a un ergot solidaire du coulisseau. Le boitier du pédalier est fixé excentriquement par rapport a l'anneau intérieur et l'ergot est fixe a l'anneau extérieur du roulement. In the main patent application, a crank of variable length has been described. easy to realize, which consists of a slide in which a slide performs a rectilinear reciprocating movement. A ball bearing, in the form of an inner ring and an outer ring. between which circulate balls, is subject to the bottom bracket and has a lug secured to the slide. The bottom bracket is fixed eccentrically to the inner ring and the lug is fixed to the outer ring of the bearing.
Selon ce mode de réalisation. il est nécessaire de fixer le roulement à billes au boîtier par soudure, vissage ou tout autre moyen. Ceci entratne une etape de fabrication supplémentaire. De plus, la fixation peut être fragile. According to this embodiment. it is necessary to fix the ball bearing to the housing by welding, screwing or any other means. This leads to an additional manufacturing step. In addition, the attachment can be fragile.
Par conséquent, un but de la présente invention est de fournir un dispositif de pédalier selon le brevet principal qui soit encore plus facile et plus économique d realiser. Therefore, an object of the present invention is to provide a bottom bracket device according to the main patent which is even easier and more economical to make.
Pour parvenir a ce but, la présente invention propose une manivelle du genre précité, avec coulisse et coulisseau a mouvement rectiligne alternatif, mais dans laquelle un ergot, solidaire de la manivelle, est entraîné en rotation selon un chemin de roulement assujetti au bottier du pédalier, ce chemin de roulement etant constitué par une gorge réalisée directement dans le boîtier. La gorge est de forme arrondie ou ovale. To achieve this object, the present invention provides a crank of the aforementioned kind, with slide and slide with reciprocating rectilinear movement, but in which a lug, integral with the crank, is rotated according to a raceway subject to the bottom bracket of the crankset , this raceway being constituted by a groove made directly in the housing. The throat is rounded or oval in shape.
Par ailleurs, on prevoit que l'ergot est solidaire de la coulisse et se trouve fixe sur un roulement a billes qui est mobile dans la gorge. Furthermore, it is expected that the lug is integral with the slide and is fixed on a ball bearing which is movable in the groove.
Un autre mode de réalisation consiste a fixer l'ergot sur l'anneau intérieur du chemin de roulement lorsque celui-ci est formé d'un anneau interieur et d'un anneau extérieur mobiles l'un par rapport a l'autre. Another embodiment consists in fixing the lug on the inner ring of the raceway when the latter is formed of an inner ring and an outer ring movable relative to each other.
La description suivante, en regard des dessins annexes a titre d'exemples non limitatifs, permettra de mleux comprendre comment l'invention peut être mise en pratique. The following description, with reference to the accompanying drawings by way of nonlimiting examples, will enable many to understand how the invention can be put into practice.
La figure 1 est une vue, en coupe, de face du dispositif de pédalier selon l'invention. Figure 1 is a sectional front view of the bottom bracket according to the invention.
La figure 2 est une vue schematique d'une gorge dans laquelle circule l'ergot du dispositif de pédalier de la figure 1. FIG. 2 is a schematic view of a groove in which the lug of the bottom bracket device of FIG. 1 circulates.
La figure 3 est une vue, en coupe, de face d'un autre mode de réalisation du dispositif de pedalier selon l'invention. Figure 3 is a front sectional view of another embodiment of the bottom bracket device according to the invention.
Sur la figure 1, on peut voir une manivelle gauche 6 et une manivelle droite 6' montées sur un arbre 7 d'un pédalier, par exemple de bicyclette. L'arbre 7 tourne dans le boîtier 14 du pédalier, autour de l'axe de rotation 15. In Figure 1, we can see a left crank 6 and a right crank 6 'mounted on a shaft 7 of a crankset, for example a bicycle. The shaft 7 rotates in the bottom bracket 14, around the axis of rotation 15.
La manivelle 6, symétrique de la manivelle 6', est constituée -d'un coulisseau 8 muni d'un ergot 9. Ce coulisseau peut avoir un mouvement de va et vient dans la coulisse 10. Dans le boîtier du pédalier, on a réalise directement une gorge 21 formant chemin de roulement. L'ergot 9 est solidaire du coulisseau 8. The crank 6, symmetrical to the crank 6 ', consists of a slide 8 provided with a lug 9. This slide can have a back and forth movement in the slide 10. In the bottom bracket, we have made directly a groove 21 forming a raceway. The lug 9 is integral with the slide 8.
Comme on le voit, sur la figure 2, le chemin de roulement est formé par une gorge 21 dont les rebords exterieur 23 et interieur 22 forment des anneaux ovales. Dans la gorge se meut l'ergot 9 qui est fixé a un roulement à billes 24. As can be seen, in FIG. 2, the raceway is formed by a groove 21, the outer 23 and inner 22 edges of which form oval rings. In the groove moves the lug 9 which is fixed to a ball bearing 24.
Sur la figure 3, le chemin de roulement est fomie par deux couronnes circulaires intérieure 22a et extérieure 23a. Dans la gorge 21a circulent des billes 24. L'ergot 9 est fixé sur l'anneau intérieur 22a qui est mobile ; l'ergot entraine la coulisse 10 selon un mouvement de va et vient. In Figure 3, the raceway is formed by two inner circular rings 22a and outer 23a. In the groove 21a circulate balls 24. The lug 9 is fixed on the inner ring 22a which is movable; the lug drives the slide 10 in a back and forth movement.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8101431A FR2498715A2 (en) | 1981-01-27 | 1981-01-27 | Variable length pedal crank for bicycle - has crank arm fixed to roller bearing travelling in oval channel cut into crank shaft casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8101431A FR2498715A2 (en) | 1981-01-27 | 1981-01-27 | Variable length pedal crank for bicycle - has crank arm fixed to roller bearing travelling in oval channel cut into crank shaft casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2498715A2 true FR2498715A2 (en) | 1982-07-30 |
Family
ID=9254525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8101431A Pending FR2498715A2 (en) | 1981-01-27 | 1981-01-27 | Variable length pedal crank for bicycle - has crank arm fixed to roller bearing travelling in oval channel cut into crank shaft casing |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2498715A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0199600A2 (en) * | 1985-04-24 | 1986-10-29 | Xi La | A pedal mechanism for a bicycle having the pedal crank radially movable thereon |
| US4807491A (en) * | 1985-03-29 | 1989-02-28 | Freder Stuckenbrok | Pedal crank as well as a pedal crank drive for bicycles or the like and a mounting for such a pedal crank drive |
| FR2702189A1 (en) * | 1993-03-02 | 1994-09-09 | Rolland Anne Elfrieda | Pedal and crank mechanism with offset pedalling access |
| ES2061367A2 (en) * | 1992-08-14 | 1994-12-01 | Urquiza D Pedro M Barroeta | Mechanism for actuating the sprocket (gearwheel) of bicycles |
| WO2009101637A2 (en) * | 2008-02-15 | 2009-08-20 | Manoj Kumar Mondal | A variable length crank-arm based drive system |
-
1981
- 1981-01-27 FR FR8101431A patent/FR2498715A2/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807491A (en) * | 1985-03-29 | 1989-02-28 | Freder Stuckenbrok | Pedal crank as well as a pedal crank drive for bicycles or the like and a mounting for such a pedal crank drive |
| EP0199600A2 (en) * | 1985-04-24 | 1986-10-29 | Xi La | A pedal mechanism for a bicycle having the pedal crank radially movable thereon |
| EP0199600A3 (en) * | 1985-04-24 | 1987-05-13 | Xi La | A pedal mechanism for a bicycle having the pedal crank radially movable thereon |
| ES2061367A2 (en) * | 1992-08-14 | 1994-12-01 | Urquiza D Pedro M Barroeta | Mechanism for actuating the sprocket (gearwheel) of bicycles |
| FR2702189A1 (en) * | 1993-03-02 | 1994-09-09 | Rolland Anne Elfrieda | Pedal and crank mechanism with offset pedalling access |
| WO2009101637A2 (en) * | 2008-02-15 | 2009-08-20 | Manoj Kumar Mondal | A variable length crank-arm based drive system |
| WO2009101637A3 (en) * | 2008-02-15 | 2010-10-28 | Manoj Kumar Mondal | A variable length crank-arm based drive system |
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