WO2009019475A1 - Retenue de roue avant sur une bicyclette - Google Patents

Retenue de roue avant sur une bicyclette Download PDF

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Publication number
WO2009019475A1
WO2009019475A1 PCT/GB2008/002674 GB2008002674W WO2009019475A1 WO 2009019475 A1 WO2009019475 A1 WO 2009019475A1 GB 2008002674 W GB2008002674 W GB 2008002674W WO 2009019475 A1 WO2009019475 A1 WO 2009019475A1
Authority
WO
WIPO (PCT)
Prior art keywords
bicycle
slots
recesses
members
wheel
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/GB2008/002674
Other languages
English (en)
Inventor
Patrick James Alexander
Ian Christopher Andrew Alexander
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.)
ATB Sales Ltd
Original Assignee
ATB Sales Ltd
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 ATB Sales Ltd filed Critical ATB Sales Ltd
Publication of WO2009019475A1 publication Critical patent/WO2009019475A1/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
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/02—Axle suspensions for mounting axles rigidly on cycle frame or fork, e.g. adjustably

Definitions

  • the present invention relates to a bicycle and has particular reference to front wheel retention in a bicycle.
  • Bicycles conventionally include wheel-securing arrangements designed to facilitate removal of front wheels for puncture repair, tyre replacement, anti-theft protection and reduction in overall size of the bicycle for storage and other purposes, including transport in the case of folding bicycles.
  • Such arrangements are generally based on provision in the bicycle front forks of aligned open-ended slots which receive stub axles of the front wheel hub.
  • the stub axles can slide out of the slots following release of fastening means, normally a clamping system. For refitting the wheel, the stub axles are reinserted into the slots and the fastening means re-applied.
  • This safety measure does not in itself inhibit movement apart of the members; this is exclusively the function, in the case of a common form of quick-release clamp design, of a spring or springs urging the members towards one another. There is no guarantee that the biassing force of the spring or springs cannot be overcome by abnormal loads acting on the loose wheel or that spring breakage or a pre-existing fault with a spring might not then allow the members to move apart.
  • a bicycle including front forks provided with aligned open-ended slots and with recesses formed in the forks at mutually remote sides thereof and communicating with the slots, a front wheel removably mounted in the slots and wheel fastening means comprising a spindle extending through the slots and a hub of the wheel and respective locating members mounted on the spindle at the ends thereof to be received in the recesses with lateral play longitudinally of the slots, the locating members being tightenable relative to one another to fix the wheel in the forks and when not tightened being movable apart to exit the recesses and allow removal of the wheel from the forks and the recesses being formed with undercuts and the locating members with lips co-operable with the undercuts to prevent unintended movement apart of the untightened members in the event of displacement of the wheel causing movement of the members to the limits of their play longitudinally of the slots.
  • each undercut may be defined by at least a segment of a frusto-conical or part-spherical surface or by a groove of substantially rectangular cross-section.
  • the recesses are preferably circular and the undercuts preferably extend entirely around the recesses.
  • the zones of co-operation of the lips and undercuts may, depending on the design of the slots in the forks, be confined to regions in the vicinity of the open and closed ends of the slots, a circular recess and an undercut extending around the circumference allow simple manufacture by cutting or milling tools.
  • the fastening means preferably comprises a quick-release clamp, such clamps being simple to operate, but susceptible to improper use giving rise to wheel looseness and therefore able to benefit, to a particular degree, from the safety measure provided by the present invention.
  • This benefit is particularly pronounced in the case of a form of quick- release clamp in which the locating members are movable apart against a resilient bias.
  • Fig. 1 is a schematic side view of the front end of a bicycle embodying the invention
  • Fig. 3 is a schematic cross-section on the line IH-II of Fig. 2.
  • Fig. 1 the front end of a bicycle 10 of a conventional kind, although the invention is equally applicable to specialist forms of bicycle such as mountain bicycles, folding bicycles, etc.
  • the bicycle 10 comprises a frame incorporating a crossbar 11 and down tube 12, which are coupled with a pivotable handlebar shaft 13 carrying front forks 14, only one of which is visible in Figs. 1 and 2.
  • a front wheel 15 is removably mounted by a hub 16 thereof in the forks 17.
  • the forks have, as shown more clearly in Figs. 2 and 3, two aligned open-ended slots 17 which are oriented generally horizontally in this instance, but can equally well be aligned substantially vertically or at angle between horizontal and vertical.
  • the slots 17 slidably receive stub axles 18 formed by protruding end portions of a tubular axle extending through the hub 16.
  • the hub 16 is normally rotatably mounted on the tubular axle by, for example, suitable bearings.
  • the stub axles 18 are slidable in the slots 17 for removal and refitting of the wheel, for example to enable repair of a puncture or in connection with anti- theft measures or wheel-folding of a folding bicycle.
  • the sliding movement of the stub axles 18 longitudinally of the slots 17 also facilitates alignment of the wheel, in particular to ensure that the vertical centre plane of symmetry of the wheel 15 is uniformly spaced from the two forks 14.
  • the wheel 15 is clamped in place between the forks 14 by fastening means 19 comprising a spindle 20 extending through and beyond the tubular axle, thus through the hub 15 and the slots 17 of the forks 18, and locating members 21 mounted on protruding end portions of the spindle and tightenable relative to one another to generate a clamping force acting on mutually remote sides of the forks.
  • the fastening means 19 is preferably a quick- release clamp of a kind in which one of the locating members 21 is threadedly engaged on one spindle end portion and the other locating member 21 is slidably engaged on the other spindle end portion and resiliently urged by biassing spring means towards the threaded locating member.
  • the clamping force is produced by, for example, an over-centre eccentric cam (not shown) rotatable in one direction by a lever and acting on the slidable locating member 21 to press it towards the threaded locating member 21 and thereby clamp the forks between the members 21 and hub 16.
  • the clamping pressure is released by reverse rotation of the lever-operated cam, after which through movement apart of the members 21 , in particular sliding movement of the slidable member 21 , away from the threaded member 21 against the force of the biassing spring means the stub axles 18 can freely slide out of the slots 17.
  • the forks are provided at the mutually remote sides thereof with circular recesses 22 communicating with the respective slots 17, as evident from Figs. 2 and 3.
  • the recesses 22 receive the locating members 21 with a radial play, i.e. the diameter of the recesses is greater than the diameter of the members 21. If the locating members 21 are not tightened relative to one another, for example through failure to operate the eccentric cam, the members 21 still remain in the respective recesses 22 as a consequence of the resilient biassing of the members towards one another. If the bicycle 10 is ridden in this condition the stub axles 18 may be able to move in the slots 17, but only to the extent of the provided radial play.
  • each recess is formed with an undercut 23 co- operable with the respective locating member 21 to prevent escape of the member from the recess when it has moved to the limit of its play in either direction longitudinally of the associated slot 17.
  • each member 21 with a protruding lip 24 engaging in the undercut.
  • the undercut and lip are preferably of substantially complementary shape, but different size, represented in the embodiment of Fig. 3 by frusto-conical surfaces of corresponding slope, but different diameter.
  • the effective zones of the undercut and lip are formed by those segments of the surfaces disposed at the front and the back of the lip and the recess with respect to the slot longitudinal axis.
  • the frusto-conical surfaces are formed around the entire circumference thereof, although only the segments respectively positioned at the front and the back are effective to engage the frusto-conical surface of the recess.
  • the recess is similarly formed with a frusto-conical surface entirely around its circumference, in this instance for manufacturing convenience and to provide some degree of tolerance for the rotational and sliding movement of the member 21.
  • each locating member 21 in particular at its lip 14, is slightly less than the minimum diameter of the associated recess 22, so that the member 21 can enter and exit the recess when centred relative thereto.
  • the complementary form of the undercut 23 and lip 24 can be achieved by other shapes, for example part-spherical surfaces or a groove and complementary lip of substantially rectangular cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

L'invention concerne une bicyclette qui comprend des fourches avant (14) comportant des fentes alignées à extrémité ouverte (17) et des cavités (22) formées dans les fourches au niveau de leurs côtés externes. Une roue avant avec un moyeu (16) est montée de façon amovible dans les fentes et fixée par une attache à libération rapide (19), qui comprend une broche (20), passant à travers les porte-fusées (18) du moyeu (16) et les fentes (17) et des éléments de positionnement (21) montés sur les extrémités de broche et reçus dans la cavité (22) avec un jeu latéral longitudinalement aux fentes. Les éléments (21) peuvent être serrés ensemble pour fixer la roue dans les fourches et, lorsqu'ils ne sont pas serrés, ils peuvent être espacés pour sortir des cavités et permettre un retrait de la roue. Les cavités (22) ont des découpes (23) et les éléments de positionnement (21) ont des lèvres (24) aptes à s'engager dans les découpes au niveau des limites du jeu des éléments de façon à empêcher un mouvement de séparation des éléments.
PCT/GB2008/002674 2007-08-09 2008-08-06 Retenue de roue avant sur une bicyclette Ceased WO2009019475A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0715581A GB2451687B (en) 2007-08-09 2007-08-09 Front wheel retention in a bicycle
GB0715581.5 2007-08-09

Publications (1)

Publication Number Publication Date
WO2009019475A1 true WO2009019475A1 (fr) 2009-02-12

Family

ID=38543344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/002674 Ceased WO2009019475A1 (fr) 2007-08-09 2008-08-06 Retenue de roue avant sur une bicyclette

Country Status (2)

Country Link
GB (1) GB2451687B (fr)
WO (1) WO2009019475A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015108474A1 (de) * 2015-05-28 2016-12-01 Croozer Gmbh Radgabel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079958A (en) * 1976-01-29 1978-03-21 Shimano Industrial Company Limited Hub anti-escape device for a bicycle
EP1762480A2 (fr) * 2005-09-07 2007-03-14 David Montague Roue de vélo à montage rapide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB245237A (en) * 1924-11-05 1926-01-07 Henry Smallwood Yoxall Improvements relating to the mounting of rear wheels of cycles
FR2289388A1 (fr) * 1974-10-28 1976-05-28 Garnier Noel Perfectionnement aux pattes de fixation des roues de cycles
US5121973A (en) * 1991-06-06 1992-06-16 S.A.F.E. Q-R Corp. Push button quick release safety hub assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079958A (en) * 1976-01-29 1978-03-21 Shimano Industrial Company Limited Hub anti-escape device for a bicycle
EP1762480A2 (fr) * 2005-09-07 2007-03-14 David Montague Roue de vélo à montage rapide

Also Published As

Publication number Publication date
GB2451687A (en) 2009-02-11
GB0715581D0 (en) 2007-09-19
GB2451687B (en) 2009-07-08

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