WO1981000546A1 - Moyeu de pignons de cycle a plusieurs vitesses et cycle comprenant ce moyeu - Google Patents

Moyeu de pignons de cycle a plusieurs vitesses et cycle comprenant ce moyeu Download PDF

Info

Publication number
WO1981000546A1
WO1981000546A1 PCT/GB1980/000130 GB8000130W WO8100546A1 WO 1981000546 A1 WO1981000546 A1 WO 1981000546A1 GB 8000130 W GB8000130 W GB 8000130W WO 8100546 A1 WO8100546 A1 WO 8100546A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
gear
casing
drive
derailleur
Prior art date
Application number
PCT/GB1980/000130
Other languages
English (en)
Inventor
S Love
Original Assignee
S Love
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 S Love filed Critical S Love
Publication of WO1981000546A1 publication Critical patent/WO1981000546A1/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
    • B62M9/12—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 the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • 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
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub

Definitions

  • This invention relates to a multiple-speed cycle gear hub and to a cycle incorporating the same.
  • the touring cyclist particularly requires a wide overall range of gears with small changes of ratio between successive gears.
  • a normal Derailleur gear system can provide either a wide range or close ratios, but not both.
  • a multiple- speed cycle gear hub comprises a hub casing, a drive input member one end of which projects from the casing and is adapted to receive a multiple sprocket Derailleur gear block, a clutch member within the casing mounted to rotate with and be axially slidable relative to the drive input member to at least first and second positions, in the first of which drive is transmitted from the clutch member to the hub casing without being transmitted through any internal gear train of the hub and in the second of which drive is transmitted from the clutch member through an internal gear train to the hub casing.
  • the hub itself is devoid of any freewheel ratchet mechanism, the Derailleur gear block incorporating any necessary freewheel mechanism.
  • the number of speeds available from the encased gear hub will multiply the number of gears available from a Derailleur block fitted to the drive input member. If the encased hub incorporates no freewheel, ratchet mechanism it can be made much more compact radially than in traditional designs, and by restricting the gear hub to a small number of ratios, e.g. two, it may be made much more compact axially.
  • the presence of the multiple-speed hub means that the Derailleur block does not need to accommodate the very large gap between top and bottom gear which would otherwise be necessary if that block alone were used and the sprockets on the block can thus be made of closer ratio.
  • the problem of chain misalignment may be overcome by restricting the number of sprockets to five or six and the disadvantages of a dished wheel are reduced or obviated by the hub construction which allows even spoke tension to be obtained.
  • the combination provides the cyclist with the desired wide range of closely spaced but. properly usable gear ratios. It does not preclude the use of multiple chain wheels and with these added to the combination an even greater spread of gears is made available.
  • the invention also extends to a cycle having a drive mechanism which comprises a wheel incorporating a multiple-speed gear hub as set forth above, a Derailleur gear block mounted on the drive input member to rotate therewith, pedals and a chain wheel and a chain for transmitting drive from the chain wheel to the Derailleur gear block.
  • the drawing shows a hub that forms the central part of a cycle wheel, for example the wheel of a bicycle or a tricycle. Neither the cycle nor the wheel is shown in detail, but it will be seen from the drawing that spokes 1 radiate from the axially opposite flanges 2 and 3 of a hub casing 4. The spokes radiating from the flange 2 are longer than those radiating from the flange 3 and this compensates for the wheel being dished, i.e. having the rim offset axially from the hub mid-point to accommodate the width of the hub, allowing even spoke tension to be obtained.
  • a hollow, tubular central axle 5 extends axially through the hub casing 4 and has externally threaded end regions 6 and 7 for securing the axle between the forks of the cycle frame in conventional manner.
  • the axle supports bearing elements 8 and 9 adjacent to opposite ends thereof, these elements being held in position by nuts 10 and 11 engaging oppositely threaded sections of the axle.
  • Ball-bearings 12 ride on the bearing element 8 and on a support member 13 screw threaded into one end of the hub casing, the balls 12 thus supporting that end of the hub casing for rotation about the axle.
  • a further series of balls 14 run on the bearing element 9 and support an axial extension 15 of a drive input member shown generally as 16 so that the drive input member may rotate relative to the axle.
  • the drive input member has an intermediate flange 17.
  • the axial extension 15 projects from this flange and has an externally threaded surface 18 to which may be fitted a conventional multi-sprocket Derailleur block shown in broken outline as 19. It will be appreciated that any conventional block having any desired number of sprockets may be used and that methods of fitting the block to the axial extension 15 other than by way of screw threads may be employed.
  • the drive input member On the opposite side of the flange 17 from the axial projection 15 the drive input member has a bearing section 20 which supports balls also running in contact with a support 22 screw threaded into the end of the hub casing 4 adjacent to the flange 3.
  • the hub casing is thus supported on the bearing section 16 in a manner allowing relative rotation between the two elements.
  • At least two pins 23, 24 project from the bearing section 16 into the hub casing. These pins engage within grooves or holes formed in a clutch member shown generally as 25 which is formed with four diametrically opposed radially outwardly projecting dogs, two of which are shown in the drawing, 26 and 27.
  • the clutch member is supported for rotation by a bearing 28 on a bush 29 surrounding and axially slidable on the axle 5.
  • a compression spring 31 bears on the bush 29 and urges the clutch 25 to the left as seen in the drawing.
  • a pin 31 is secured to the bush 29 and extends through a slot 32 in the axle.
  • the pin 31 is carried at the end of a rod 33 which is axially slidable within the hollow axle and connected in conventional manner by a cable to a lever under the control of the cyclist.
  • the hub houses a planetary gear train therein, comprising a sun wheel 34 secured to the fixed axle 5.
  • Planet wheels 35 and 36 in mesh with the sun wheel are rotatably mounted by bearings on respective shafts 37 and 38 extending from a carrier 39 rotatahle about the axis 5 and secured to the hub casing 4 by screw threads 40.
  • An annular gear.41 has internally formed sprockets in mesh with the planet wheels 35 and 36 and fits axially between the carrier 39 and the support 22. Adjacent to the support 22 the annular gear is formed with at least two radially inwardly projecting dogs 42 and 43 respectively.
  • the internal gears within the hub are in constant mesh and, apart from slight axial tolerance on the annular gear 41, do not alter their relative radial or axial distances from one another at any time during the operation of the hub.
  • a particularly convenient ratio is a 2:1 reduction, to achieve which the annular gear 41 will be formed with twice as many teeth as the sun wheel 34.
  • the rod 33 is released allowing the spring 30 to move the clutch 25 to the left as seen in the drawing, into a limit position wherein the pin 31 contacts the end of the slot 32.
  • the dogs 26, 27 of the clutch move out of engagement with the dogs 42, 43 of the annular gear and slide axially into a position where they engage the shafts 37, 38 carrying the planet wheels 35 and 36.
  • drive from the input member 16 is transmitted directly to the carrier 39, bypassing the gear train, and is thus transmitted directly to the hub casing 4 and the wheel.
  • the drive from the Derailleur gear sprocket to the wheel is thus in a 1:1 ratio.
  • the gear arrangement within the hub is devoid of any freewheel mechanism and is a simple two-speed gear selectable by axial movement of the clutch member 25. This simplicity enables the hub gear to be made extremely compact with a minimum of dishing of the cycle wheel. In either position of the clutch the position of the chain on the Derailleur sprocket may be changed at will by the cyclist.
  • the invention is applicable to cycle hubs which can be used in the drive assembly of any type of bicycle or tricycle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

Un moyeu a pignons de cycle a plusieurs vitesses comprend un boitier de pignon (4) et un organe d'entree d'entrainement (16) dont une extremite se projette depuis le boitier. Cette extremite est adaptee pour recevoir un bloc de pignon de derailleur a dents multiples (19) qui comprend de preference son propre mecanisme de roue libre. Un organe d'embrayage (25) peut etre mis en rotation par l'organe d'entree d'entrainement (16) et peut coulisser axialement sur ce dernier entre des positions ou il entraine directement un porteur (39) fixe au boitier et ou il entraine le porteur par l'intermediaire d'un dispositif d'engrenage planetaire (34, 35, 36, 41). Le moyeu lui-meme est de preference depourvu de tout mecanisme d'encliquetage de roue libre et les pignons interieurs trouvant dans le moyeu sont en engrenement constant et leurs distances radiales ou axiales relatives ne sont pas modifiees pendant le fonctionnement du moyeu.
PCT/GB1980/000130 1979-08-22 1980-08-21 Moyeu de pignons de cycle a plusieurs vitesses et cycle comprenant ce moyeu WO1981000546A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7929279 1979-08-22
GB7929279 1979-08-22

Publications (1)

Publication Number Publication Date
WO1981000546A1 true WO1981000546A1 (fr) 1981-03-05

Family

ID=10507368

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1980/000130 WO1981000546A1 (fr) 1979-08-22 1980-08-21 Moyeu de pignons de cycle a plusieurs vitesses et cycle comprenant ce moyeu

Country Status (2)

Country Link
EP (1) EP0035021A1 (fr)
WO (1) WO1981000546A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540479A1 (fr) * 1991-10-31 1993-05-05 Enea Montanelli Roue de traction, en particulier pour un vélo d'enfant
EP2767467A1 (fr) * 2013-02-19 2014-08-20 Sram, Llc. Transmission pour bicyclette électrique
WO2021158721A1 (fr) * 2020-02-07 2021-08-12 Stacy Rodriguez Perrin Courroie de bicyclette ou tendeur de chaîne et kit de conversion de moyeu à engrenage interne

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1576850A (fr) * 1967-08-08 1969-08-01
US4083421A (en) * 1976-12-06 1978-04-11 Horn Ronald L Van Two speed motorcycle hub transmission

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1576850A (fr) * 1967-08-08 1969-08-01
US4083421A (en) * 1976-12-06 1978-04-11 Horn Ronald L Van Two speed motorcycle hub transmission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540479A1 (fr) * 1991-10-31 1993-05-05 Enea Montanelli Roue de traction, en particulier pour un vélo d'enfant
EP2767467A1 (fr) * 2013-02-19 2014-08-20 Sram, Llc. Transmission pour bicyclette électrique
US9243692B2 (en) 2013-02-19 2016-01-26 Sram, Llc Electric bicycle transmission
WO2021158721A1 (fr) * 2020-02-07 2021-08-12 Stacy Rodriguez Perrin Courroie de bicyclette ou tendeur de chaîne et kit de conversion de moyeu à engrenage interne
US12103641B2 (en) 2020-02-07 2024-10-01 Perrin Stacy Rodriguez Bicycle belt or chain tensioner and internally geared hub conversion kit

Also Published As

Publication number Publication date
EP0035021A1 (fr) 1981-09-09

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