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WO2005021369A1 - Tendeur de chaine pour bicyclettes - Google Patents

Tendeur de chaine pour bicyclettes Download PDF

Info

Publication number
WO2005021369A1
WO2005021369A1 PCT/IB2004/002538 IB2004002538W WO2005021369A1 WO 2005021369 A1 WO2005021369 A1 WO 2005021369A1 IB 2004002538 W IB2004002538 W IB 2004002538W WO 2005021369 A1 WO2005021369 A1 WO 2005021369A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
arm
wheel
pass
bicycles
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.)
Ceased
Application number
PCT/IB2004/002538
Other languages
English (en)
Italian (it)
Inventor
Massimo Cesarato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2005021369A1 publication Critical patent/WO2005021369A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B62M9/16—Tensioning or adjusting equipment for chains, belts or the like

Definitions

  • the present invention relates to a chain-tensioner for bicycles, particularly for bicycles in which the hub of the rear wheel is constrained on the frame without any substantial possibility of movement in a direction capable of significantly varying the tension of the chain.
  • This situation is typical of frames for bicycles having derailleur gears.
  • frames of that type there is normally no significant possibility of movement of the hub of the rear wheel relative to the frame with the aim of adjusting the tension of the chain because the tension of the chain is automatically adjusted by the derailleur mechanism which is specially designed, among other things, to recover the excess chain for each selected transmission ratio by means of resiliency sprung wheels.
  • the principal technical task of the invention is to provide a chain- tensioner for bicycles which is capable of permitting adjustment of the chain tension in bicycles in which the hub is constrained on the frame without any substantial possibility of movement in a direction capable of significantly vary- ing the tension of the chain, also permitting such adjustment without making use of derailleur gears.
  • a chain-tensioner capable of optimising transmissions with gears integrated in the wheel hub on frames arranged to accommodate derailleur gears.
  • FIG. 1 is a perspective view from the opposite side of the bicycle of Figure 1.
  • 2 distinguishes a rear wheel having a wheel hub 3 constrained by means of a wheel axle 4 and nuts 5 in a drop-out 6 of a frame 7.
  • Figure 1 also shows a sprocket 8 which is keyed onto the hub 3 and on which is engaged a chain 9 having a normally active pass 10 and a return pass 11.
  • the drawing shows two frame elements 12 which converge at a junction 13 in which the drop-out 6 is arranged and from which extends a downwardly directed lug 14 which is arranged for the fitting of a derailleur which is not shown and which is not present in the bicycle pro- **d in accordance with the invention.
  • the constraint with which the axle 4 is held in the drop-out 6 is such as not to permit relative movements in a direction capable of significantly varying the tension of the chain. This can, however, be remedied by adopting a chain- tensioner 20 according to the invention.
  • the chain-tensioner 20 comprises an arm 21 having a first and a second end 22, 23 which are arranged longitudinally opposite each other.
  • the first end 22 is constrained pivotally on the frame, at the location of the lug 14 for the attachment of the derailleur, by means of a threaded fastener 25.
  • a first and a second wheel 26, 27 are mounted on the second end 23 of the arm and at the location of an intermedi- ate portion thereof, respectively.
  • the first wheel 26 and the second wheel 27 are operatively engaged on the return pass 11 of the chain 9 with the first wheel engaging on the side of the chain remote from the active pass 10 (or from below the return pass 11) and with the second wheel engaging on the side of the chain facing the active pass 10 (or from above the return pass 11).
  • the wheel 26 has a diameter which is substantially larger than the diameter of the wheel 27.
  • the wheel 26 is of the type having 13 teeth and the wheel 27 is of the type having 10 teeth.
  • the two wheels 26, 27 are mounted idly on respective pins 29 which can be locked in an adjustable position by means of nuts 30 in slots 31 extending transversely to the longitudinal direction of the arm 21.
  • a helical spring 32 is active between the arm 21 and the frame 7 in order to urge the chain-tensioner 20 into engagement with the return pass of the chain and to pivot the arm 21 towards the active pass 10 of the chain 9.
  • the chain-tensioning effect is promoted in the invention both by the resilient urging exerted by the spring 32, and by the adjustment of the wheels 26, 27 relative to the slots 31.
  • the invention so described may be modified and varied.
  • the arm 21 to be produced in two rod-shaped portions which are articulated to each other, for example, at the location of the pin of the wheel 27. It is also provided that the number of wheels may be increased.

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)

Abstract

Ce tendeur de chaîne pour bicyclettes, notamment pour des bicyclettes dans lesquelles le moyeu (3) est accouplé rigidement sur le cadre (7) sans aucune possibilité notable de mouvement dans un sens autorisant une variation substantielle de la tension de la chaîne (9), comporte un bras (21) possédant une première et une deuxième extrémité (22, 23) disposées longitudinalement en regard l'une de l'autre, la première extrémité (22) étant accouplée rigidement sur le cadre (7) au voisinage du moyeu (3), et également au moins une première et une deuxième roue (26, 27) montées respectivement sur la deuxième extrémité (23) du bras (21) et au niveau d'une partie intermédiaire de celui-ci.
PCT/IB2004/002538 2003-08-28 2004-08-06 Tendeur de chaine pour bicyclettes Ceased WO2005021369A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD20030192 ITPD20030192A1 (it) 2003-08-28 2003-08-28 Tendicatena per biciclette.
ITPD2003A000192 2003-08-28

Publications (1)

Publication Number Publication Date
WO2005021369A1 true WO2005021369A1 (fr) 2005-03-10

Family

ID=34260028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/002538 Ceased WO2005021369A1 (fr) 2003-08-28 2004-08-06 Tendeur de chaine pour bicyclettes

Country Status (2)

Country Link
IT (1) ITPD20030192A1 (fr)
WO (1) WO2005021369A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8267820B2 (en) * 2008-10-31 2012-09-18 Shimano Inc. Bicycle chain tensioner
EP2562074A4 (fr) * 2010-04-22 2015-09-23 Iturbide Jesús Angel Orrio Tendeur pour transmission de bicyclette
US10486770B2 (en) 2016-06-30 2019-11-26 Shimano Inc. Bicycle tensioner apparatus and bicycle tensioner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE491351A (fr) *
CS239393B1 (sk) * 1984-06-01 1986-01-16 Jan Zatko Zariadenie na napínanie šlapatllovej reťaze
GB2243661A (en) * 1990-05-04 1991-11-06 Paul Antony Fletcher Swing arm chain tensioner for bicycles
US5213549A (en) * 1991-07-22 1993-05-25 Pierre Blanchard Derailleurs for multi-speed bicycles
DE9420206U1 (de) * 1994-12-16 1995-02-09 Hild, Tobias, 82064 Straßlach-Dingharting Kettenspannvorrichtung
JPH082473A (ja) * 1994-06-21 1996-01-09 S R Santsuaa:Kk 歯付ベルト駆動自転車の弛み調整装置
US6135903A (en) * 1996-07-03 2000-10-24 Savard; Franck Tension and guiding device of a chain for bicycle change speed gear

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE491351A (fr) *
CS239393B1 (sk) * 1984-06-01 1986-01-16 Jan Zatko Zariadenie na napínanie šlapatllovej reťaze
GB2243661A (en) * 1990-05-04 1991-11-06 Paul Antony Fletcher Swing arm chain tensioner for bicycles
US5213549A (en) * 1991-07-22 1993-05-25 Pierre Blanchard Derailleurs for multi-speed bicycles
JPH082473A (ja) * 1994-06-21 1996-01-09 S R Santsuaa:Kk 歯付ベルト駆動自転車の弛み調整装置
DE9420206U1 (de) * 1994-12-16 1995-02-09 Hild, Tobias, 82064 Straßlach-Dingharting Kettenspannvorrichtung
US6135903A (en) * 1996-07-03 2000-10-24 Savard; Franck Tension and guiding device of a chain for bicycle change speed gear

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8267820B2 (en) * 2008-10-31 2012-09-18 Shimano Inc. Bicycle chain tensioner
EP2562074A4 (fr) * 2010-04-22 2015-09-23 Iturbide Jesús Angel Orrio Tendeur pour transmission de bicyclette
US10486770B2 (en) 2016-06-30 2019-11-26 Shimano Inc. Bicycle tensioner apparatus and bicycle tensioner

Also Published As

Publication number Publication date
ITPD20030192A1 (it) 2005-02-28

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