WO2010073099A1 - Jeu de pédalier pour pédalier de vélo ou de moto - Google Patents

Jeu de pédalier pour pédalier de vélo ou de moto Download PDF

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Publication number
WO2010073099A1
WO2010073099A1 PCT/IB2009/007849 IB2009007849W WO2010073099A1 WO 2010073099 A1 WO2010073099 A1 WO 2010073099A1 IB 2009007849 W IB2009007849 W IB 2009007849W WO 2010073099 A1 WO2010073099 A1 WO 2010073099A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankset
crown
chain
crowns
cycle
Prior art date
Application number
PCT/IB2009/007849
Other languages
English (en)
Inventor
Massimo Casana
Original Assignee
O.M. Casana Di Casana G. E M. & C. S.A.S.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by O.M. Casana Di Casana G. E M. & C. S.A.S. filed Critical O.M. Casana Di Casana G. E M. & C. S.A.S.
Publication of WO2010073099A1 publication Critical patent/WO2010073099A1/fr

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
    • 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
    • B62M2009/007—Guides to prevent chain from slipping off the sprocket

Definitions

  • Field of application The present invention is applicable to the field of the cycles and of the motorcycles and, in particular, it regards the group of generation and transmission of the motion.
  • the present invention refers to a crankset for cycles and motorcycles.
  • the motion generation group comprises a motor, for a motorcycle, or pedals actioned from a person for a cycle.
  • crankset in the cyclist field it is the group consisting in the cranks and the front toothed crowns, while in the motorcycle field it is the group consisting in the front crowns with their mechanical connection to the motor shaft.
  • the cycle case the motorcycle case being equivalent.
  • the number of front crowns generally vary from one to three, even if exceptionally it has been produced also crankset with four crowns.
  • the mountain bike mount three crowns while the racing bicycles two, even if there are cases in which this custom it is not respected.
  • the track bicycles or the normal bicycles generally mount a single front crown and generally a single posterior pinion.
  • the front crown is not fixed with bolts to the cranks, but they are made by one piece. This is the case, for example, of the monomarch bicycles.
  • the crowns are equipped by plurality of circumferential teeth apt to interact with the chain. If are present more crowns, they generally have different diameters and, consequently, a different number of teeth. This concurs to vary the transmission relationship of the motion to the gears, so varying the speed of the cycle or the motorcycle and the strain to obtain it.
  • the choice of the combination of crowns that is the choice of the dimensions and the number of teeth for each crown, is not random, but determined by the fact that with the choice of a preferred number of teeth there is a wide range of gear ratios available without create duplication in the combinations of gear ratio between the crowns of the crankset and those of the pinion.
  • interstices Between the crowns of the crankset and between the crankset and the cycle body there are spaces, or interstices, that have big dimensions. Such interstices, in particular, are generally larger then the width of the chain.
  • the embodiments of those, and the distance between them, is such to prevent that the chain comes down in depth in the interstice. If the chain slips into the interstice between the crankset and the cycle body, the space is generally sufficient to allow the chain to come down till the bottom bracket.
  • the first disadvantage is that the cycle is not more usable and the customer must, if wants to proceed, repair the breakdown immediately.
  • the crowns are provided by a plurality of axial shelves susceptible to interact with the chain in order to accompany it in the shift. Some of such shelves are made opportunely moulding the crowns, while others are made associating to the crowns same axially protruding elements.
  • crowns supplied by a plurality of axial shelves susceptible to interact with the chain.
  • Each shelf is supplied by hooking means extending radially from the outer surface of the protruding element on to hold the mesh of the chain in case of accidental falls thereof.
  • a general object of the present invention is to overcome the above drawbacks, by providing a crankset for the bottom bracket of a cycle or a motorcycle able to avoid that the chain may slip into the interspace between the crankset and the cycle body or motorcycle body.
  • a particular object, within the above general object, is to realize a crankset for the bottom bracket of a cycle or a motorcycle that concurs to avoid that the chain can slip into the interstice between the crowns.
  • Another object is that the embodiments that is proposed is also applicable to crankset already put on the market or already in use.
  • crankset for the bottom bracket of a cycle or motorcycle according to the invention.
  • the crankset is of the type including at least a crown which can interact with a motion transmission chain and at least one moulded support body of at least one respective crown and susceptible to be stably associated with the bottom bracket.
  • each crown is associated with the moulded body or with respective moulded body by screw means.
  • the crankset will be able to comprise also one or more elements axially protruding from the crown and provided by hooking means that extend radially from the external surface in order to withhold the meshes of the chain in case of accidental falls thereof.
  • the protruding elements will be able to comprise the screw means.
  • the proposed crankset exceeds the drawbacks of the state of the art having hooking means placed on the protruding elements that withhold the chain avoiding that it falls inside of an interstice.
  • the protruding elements comprise the screw means and therefore they are associated to the crown without having to modify it. In such case, consequently, the protruding elements are easy applicable also to the crankset already in commerce and to the crankset already in use.
  • the hooking means not only avoid that the chain penetrates in depth in the interstice, but also avoid an excessive lateral shifting of the chain on the same protruding elements.
  • the hooking means will include at least one section with a raised profile realized in the protruding elements. These interact with the pair of union plates of the rollers of the chain arranging itself between them.
  • the protruding elements so made will be able to protrude itself from both sides of the crown and to have such raised profile zones on both sides. This is particularly advantageous in single-chain case since this stops the collapse of the chain no matter what side of the crown at which this fall occurs.
  • crankset according to the invention, which is described as a non-limiting example with the help of the annexed drawings, in which:
  • FIG. 1 is a crankset as for the invention
  • FIG. 2 is a detail of the crankset of the invention in use
  • FIG. 3 is another detail of the crankset of the invention in use
  • FIG. 4 is a detail of FIG. 3;
  • FIG. 5 is another detail of the crankset of the invention.
  • crankset 1 for the bottom bracket 6 of a cycle or motorcycle.
  • It comprises at least one crown 2 interacting with a motion transmission chain 3 and one or more elements 4 axially protruding from crown 2 in order to intercept the chain 3 in case of accidental falls thereof.
  • the protruding elements 4 protrude itself only on one side of crown 2.
  • the protruding elements are provided.
  • hooking means 10 that extend radially from the external surface of the protruding elements 4.
  • hooking means 10 concur, as it is observed in FIG. 4, to withhold the meshes of the chain 3 intercepted during the fall in the interstice. This prevents the fall in depth in the interstice and, at the same time, lateral shifting of the chain 3 on the protruding elements 4 that could lead to damage the chain 3 or to other mechanical problems.
  • hooking means 10 are substantially constituted by at least one raised profile section 11 realized on the protruding elements 4.
  • Such section 11 can be obtained moulding the protruding element 4 or stably associating thereof a ring-like body.
  • the hooking means 10 To improve the action of the hooking means 10, it is expectable that they will be properly placed at a first end of a protruding element 4. If also the second end protrude itself from the crown 2, the hooking means 10 may be placed also at the second end.
  • each crankset 1 comprises a moulded body 5 for support the crown 2 and susceptible to being stably associate to the bottom bracket 6. To such support body 5 are stably associated the pedals 7, while crown 2 is associated to it generally by screw means 8.
  • the protruding elements 4 are made by the screw means 8. It is obvious that in such case the crankset known, in which they are present a moulded body 5 and a crown 2 joined by screw means 8, are easily transformable in a crankset 1 of the invention without complicated and expensive modifications in economic terms and in terms of time of realization.
  • crowns and moulded bodies are irrelevant for the purposes of the invention.
  • the number of crowns can be any, in particular it may also be a single crown.
  • the screw means 8 comprise a plurality of screws 20.
  • the latter as noted in FIG. 5, have an elongated body 21 , at least partially threaded, and a head 22 projecting radially with respect to the elongated body 21. They are screwed in holes made on the moulded body 5 and on the crown 2, when the holes are aligned so that stably bind them.
  • the hooking means can be opportunely made by radial appendages applied to the ends of these screw means.
  • the screw means can comprise a plurality of extension elements each associate to the head of a respective screw.
  • the screws in this case, can be calibrated in length with the length of the holes on which they agree, just as the screws of the known art, and the protruding element will consists of the extension element.
  • the latter will be suitably moulded so that a portion constitutes the hooking means.
  • crankset for the bottom bracket of a cycle or of a motorcycle of the invention overcomes the above mentioned drawbacks and, in particular, allows to avoids that the chain can slip into the interspace between the crankset and the cycle or motorcycle body.
  • the above described crankset allow to avoid that the chain can be slipped into the interstices of the crankset, comprised those between the crowns.
  • crankset is easy to made and it is obtainable also modifying the crankset already in use or on the market without difficulty, in a short time and with slow costs.
  • crankset according to the invention is susceptible of a number of changes and variants, within the inventive concept as disclosed in the appended claims. All the details can be replaced by other technically equivalent parts without departing from the scope of the present invention.
  • crankset has been described with particular reference to the accompanying figures, the riumerpls referred tp in the disclosure a ⁇ d, claims, are pnjy ⁇ secj fpr the s ⁇ ke of a better intelligibility of the invention, an$ s,fiaj

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

La présente invention concerne un jeu de pédalier pour pédalier (6) de vélo ou de moto qui comprend : une ou plusieurs couronnes (2) susceptibles d'interagir avec une chaîne de transmission (3) ; un corps de support façonné (5) afin de permettre aux couronnes (2) d'être assujetties au pédalier (6), chaque couronne (2) étant reliée au corps de support (5) par un moyen de vis (8) ; un ou plusieurs éléments (4) faisant axialement saillie depuis les couronnes (2) et pourvus d'un moyen d'accrochage (10) s'étendant radialement depuis la surface externe des éléments saillants (4) afin de retenir les maillons de la chaîne de transmission (3) au cas où celle-ci tomberait accidentellement. Les éléments saillants (4) comprennent le moyen de vis (8).
PCT/IB2009/007849 2008-12-23 2009-12-22 Jeu de pédalier pour pédalier de vélo ou de moto WO2010073099A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2008A000238 2008-12-23
ITBS2008A000238A IT1392382B1 (it) 2008-12-23 2008-12-23 Guarnitura per il movimento centrale di un ciclo o di un motociclo

Publications (1)

Publication Number Publication Date
WO2010073099A1 true WO2010073099A1 (fr) 2010-07-01

Family

ID=40829712

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/007849 WO2010073099A1 (fr) 2008-12-23 2009-12-22 Jeu de pédalier pour pédalier de vélo ou de moto

Country Status (2)

Country Link
IT (1) IT1392382B1 (fr)
WO (1) WO2010073099A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015051954A1 (fr) * 2013-10-08 2015-04-16 Robert Bosch Gmbh Véhicule pouvant être actionné par moteur et par la force musculaire, muni d'un système d'assistance au changement de vitesse
EP2913262A1 (fr) * 2014-02-27 2015-09-02 SRAM Deutschland GmbH Dispositif d'enroulement de la chaîne sur un pignon avant à chaîne avant d'un vélo
CN106627970A (zh) * 2016-12-20 2017-05-10 史文博 一种全新自行车变速器
US20230331339A1 (en) * 2022-04-14 2023-10-19 Shimano Inc. Crank assembly for human powered vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144984A2 (fr) * 1983-12-12 1985-06-19 Jiri Krampera Changement de vitesse à dérailleur de chaîne pour bicyclette
EP0513681A1 (fr) 1991-05-13 1992-11-19 Shimano Inc. Derailleur avant de bicyclette avec dispositif de remise en place de la chaîne
DE29722971U1 (de) 1997-12-30 1998-02-19 Leng, Chi Chih, Nan Tou Fahrrad-Zahnkranz
EP0945335A1 (fr) 1998-03-26 1999-09-29 Attilio Bartolozzi Dispositif de changement de vitesse pour des bicyclettes
US6572500B2 (en) 2000-06-30 2003-06-03 Shimano Inc. Bicycle sprocket with chain support projections
EP1609713A2 (fr) 2004-06-22 2005-12-28 Shimano Inc. Projection d'assistance au changement de vitesse pour pinion de bicyclette

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144984A2 (fr) * 1983-12-12 1985-06-19 Jiri Krampera Changement de vitesse à dérailleur de chaîne pour bicyclette
EP0513681A1 (fr) 1991-05-13 1992-11-19 Shimano Inc. Derailleur avant de bicyclette avec dispositif de remise en place de la chaîne
DE29722971U1 (de) 1997-12-30 1998-02-19 Leng, Chi Chih, Nan Tou Fahrrad-Zahnkranz
EP0945335A1 (fr) 1998-03-26 1999-09-29 Attilio Bartolozzi Dispositif de changement de vitesse pour des bicyclettes
US6572500B2 (en) 2000-06-30 2003-06-03 Shimano Inc. Bicycle sprocket with chain support projections
EP1609713A2 (fr) 2004-06-22 2005-12-28 Shimano Inc. Projection d'assistance au changement de vitesse pour pinion de bicyclette

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015051954A1 (fr) * 2013-10-08 2015-04-16 Robert Bosch Gmbh Véhicule pouvant être actionné par moteur et par la force musculaire, muni d'un système d'assistance au changement de vitesse
EP2913262A1 (fr) * 2014-02-27 2015-09-02 SRAM Deutschland GmbH Dispositif d'enroulement de la chaîne sur un pignon avant à chaîne avant d'un vélo
US9944351B2 (en) 2014-02-27 2018-04-17 Sram, Llc Device for shifting the chain on a front chain wheel for a bicycle
CN106627970A (zh) * 2016-12-20 2017-05-10 史文博 一种全新自行车变速器
US20230331339A1 (en) * 2022-04-14 2023-10-19 Shimano Inc. Crank assembly for human powered vehicle
US11897576B2 (en) * 2022-04-14 2024-02-13 Shimano Inc. Crank assembly for human powered vehicle

Also Published As

Publication number Publication date
IT1392382B1 (it) 2012-03-02
ITBS20080238A1 (it) 2010-06-24

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