EP0457799A1 - Ensemble d'actionnement combine des freins et des pignons - Google Patents

Ensemble d'actionnement combine des freins et des pignons

Info

Publication number
EP0457799A1
EP0457799A1 EP19900902810 EP90902810A EP0457799A1 EP 0457799 A1 EP0457799 A1 EP 0457799A1 EP 19900902810 EP19900902810 EP 19900902810 EP 90902810 A EP90902810 A EP 90902810A EP 0457799 A1 EP0457799 A1 EP 0457799A1
Authority
EP
European Patent Office
Prior art keywords
gear
operating lever
lever
brake
drum
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
EP19900902810
Other languages
German (de)
English (en)
Inventor
Nicholas John Collins
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.)
INNOVAIR DESIGNS LIMITED
Original Assignee
Innovair Designs 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 Innovair Designs Ltd filed Critical Innovair Designs Ltd
Publication of EP0457799A1 publication Critical patent/EP0457799A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L3/00—Brake-actuating mechanisms; Arrangements thereof
    • B62L3/02—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever
    • 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
    • B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
    • B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
    • B62M25/04—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated

Definitions

  • This invention relates to a combined assembly of a brake-operating lever and a gear-operating lever for a bicycle.
  • a conventional brake-operating lever for a bicycle is a smoothly externally contoured first-order lever attached to the handlebars (typically one to each side) so that the major arm of the lever can be moved towards the handlebars merely by extending the fingers of the rider and pulling the lever inwards. The minor arm then moves outwards, pulling a cable wire, which at its remote end tightens a brake on one or other wheel.
  • a conventional gear-operating lever can be mounted on the handlebars or on the bicycle frame. It is, smaller than the brake lever and the mechanism -A ⁇ atttaches to is so configured that the lever can be operated step-wise in either direction and then halted, to give to an attached cable a unit movement ⁇ equivalent to a single gear-change at a gear change mechanism associated with the rear axle or with the drive' 1 sprockets.
  • To brake the essential grip on the handlebars is unchanged, but to effect a gear-change the cyclist must release his grip on the handlebars for each change. " Control of the bicycle is temporarily diminished, and fatigue to the user builds up over a period especially under race conditions.
  • the present invention sets out to provide a combined assembly of a brake-generating lever and a gear-operating lever for a bicycle such that either lever can be operated by the cyclist without substantial alterations of hand position on the handlebars.
  • the invention consists in a combined assembly of a brake-operating lever and a gear-operating lever, for mounting on the handlebars of a bicycle, in which a gear-operating lever is located relative to a brake-operating lever so that parts at least of the two levers jointly define an open gap, the two levers being mounted for combined, generally non-relative, movement to effect a braking action only, when the brake operating lever is pulled, and for separate relative movement, to effect a gear-changing operation only, both when the gear-operating lever is pushed manually outwards to diminish the said gap and when the gear-operating lever is pulled manually inwards to separate from the brake-operating lever by increasing the said gap.
  • the gear-operating lever lies generally behind the gear-operating lever.
  • gear operating lever and the brake operating lever are each generally channel-shaped, and the gear operating lever,
  • a wind-up and release drum to which the wire of a gear-operating cable is attached is journalled about the pivot axis of the brake-operating lever.
  • an arcuate gear-number indicator is attached for rotation with the drum so as to show which gear is currently engaged.
  • the invention consists in a bicycle having at least one such assembly as described above attached to the handlebars.
  • the bicycle has two such assemblies one, for clamping the rear-wheel axle gear and applying the rear brake, connected to the right hand portion of the handlebars and the other, for changing the drive wheel gear and applying the front brake, connected to the left hand portion of the handlebars.
  • the bicycle may include an automatic relative length compensator for the cables comprising a pivoted lever connected at one end to a cable wire and at the other end to the sheath of the other cable whereby wire extension to the axle gear change automatically adjusts the effective cable length to the drive gear change.
  • It may also comprise a cable tension adjuster including a cam, rotary about an axis transverse to the cable, and through which a cable wire passes; a cam follower, of generally cylindrical shape and of the same diameter as the cable sheath, through which the wire also passes, the cam follower being imparted a movement longitudinal of the wire by cam rotation and being mounted to abut the sheath and alter its position relative to the wire as a tension adjuster.
  • a cable tension adjuster including a cam, rotary about an axis transverse to the cable, and through which a cable wire passes; a cam follower, of generally cylindrical shape and of the same diameter as the cable sheath, through which the wire also passes, the cam follower being imparted a movement longitudinal of the wire by cam rotation and being mounted to abut the sheath and alter its position relative to the wire as a tension adjuster.
  • Figure 1 is the a view of a bicycle equipped with a combined assembly, in accordance with a first embodiment of the invention, of a brake-operating lever and a gear-operating lever, at each side of the handlebars.
  • Figure 2 is a side view of a slightly modified embodiment of one of said combined assemblies, partly in section and cutaway, and in simplified illustration, clamped to part of the handlebars.
  • Figure 3 is a side view as in Fig 2 but with the brake lever removed, ⁇
  • Figure 3A shows from the front a cable pulley for the gear change cable.
  • Figure 4 is a side view as in Fig. 3 but with further component parts removed;
  • Figure 5 is a corresponding side view to Fig. 4, showing the removed parts
  • Figure 6 is an exploded view of a further embodiment of the internal mechanism of said combined assembly
  • Figure 7 is a side view, generally as in Fig. 3, of a yet further embodiment of the internal mechanism of the invention.
  • Figure 8 shows in diagrammatic plan view a compensator arrangement for a gear cable, for use with any embodiment of the present invention.
  • Figure 9 shows an exploded view of yet a further embodiment of the internal mechanism of the invention, having similarities to that of Fig. 6; and Figures 10a and 10b show a cable adjuster mechanism.
  • a bicycle 1 has front wheel 2 and rear wheel 3. At the front wheel 2 there is a conventional brake mechanism with operating cable 4a extending to brake operating lever 13, on the left portion 5a of handlebar 5. Lever 13 is generally U-shaped in cross section. At the rear wheel 3 there is a further conventional brake mechanism 6 with operating cable 6a extending to brake operating lever 12, on the right handlebar portions 5b.
  • gear-change mechanism 8 connected by cable 8a (not shown in its entirety because extending behind the frame of the bicycle) which passes up within the handlebar tubing to extend eventually to gear operating lever 10 of generally similar contour to lever 12 but somewhat smaller, lying partly within but (in its neutral position) slightly spaced from the said lever 12 by distance F at the outer end.
  • gear operating lever 10 of generally similar contour to lever 12 but somewhat smaller, lying partly within but (in its neutral position) slightly spaced from the said lever 12 by distance F at the outer end.
  • gear change mechanism 15 with cable 15a passing via compensator 16 to lever 11, which is in all respects similar to lever 10.
  • Figs 2 to 5 can conveniently be considered together. They show in more detail the assembly of brake operating lever 12 and gear-operating lever 10 as shown in Fig. 1, slightly modified in the minor respect that brake cable 6a, in Fig. 2 to 5, also passes at least initially within the handlebar tubing rather than loop freely upward as shown in Fig. 1.
  • the assembly comprises a main shell or case 17 fixed by fixing block 18 to the right portion 5b of handlebars 5 by means of bolt 19.
  • the upper part of block 18 holds and restrains the cover of operating cables 6a and 8a so that the internal wires 6a' and 8a' can project for attachment to their respective operating systems.
  • wire 6a' terminates in stopper 20 held in groove 21 of brake operating lever 12.
  • Wire 8a' is wrapped round and connected to a pulley 33 as described in more detail below.
  • the handle 12 pivots about this shaft 32 so that the - more the handle 12 is caused to approach handlebar portion 5b the more the wire 6a' is pulled and the more brake assembly 6 is applied.
  • Pulley 33 is loosely journalled within case 17 about shaft 32. As shown in Fig. 3a it comprises a first zone of fine serrations at 33A, a second zone as a wire wind-up drum 33B and a third zone with ratchet teeth 33C. Wire 8a 1 surrounds the drum 33b to terminate in conventional anchor cavity 33d (Fig.3).
  • gear-operating lever 10 has an upper rearward face with serrations 37 matching the ' serrations 33a.
  • a further shaft 35 extends within case 17, forwardly of shaft 34 in plates 31.
  • a pawl plate 36 is mounted about shaft 35 and possesses, a primary detent 36a, a secondary detent 36b and a rearward operating arm 36c biassed upwards at spring 37 against shaft 34.
  • spring 39 about shaft 32 assists in holding ratchet teeth 33C against the detents.
  • spring 38 assists gravity in holding gear-operating ⁇ lever 10 in its shown position between stop 31b and serrations 33A.
  • the device operates as follows:-
  • Gear-operating lever 10 is pulled back, away from the brake-operating lever 12, by inserting the fingers into the gap F and pulling back. Initially, it rotates about axis 30. Very soon, however, it can no longer rotate because it hits and engages serrated zone 33A of drum 33 with its own serrated face 37.
  • Gear-operating lever 10 is pushed forward, by the outside of the cylists' hand, so as to close up gap F. It soon reaches transverse stop 31b, and plate 31 starts to rotate anticlockwise. Thus transverse shaft 34 bears down on rearward protrusion 36c of detent plate, 36, thereby releasing primary pawl 36a from its tooth. The drum rotates back, due to the tension within wire 8a', but is caught in the secondary pawl 36b. Further operating pressure at 34 cannot however dislodge this secondary pawl 36b. This can only be done on release, when spring 37 pushes primary pawl 36a back into engagement with the desired tooth, one click further on. The effect is rather like a clock 'escapement' mechanism.
  • Brake-operating lever 12 is pulled inward toward handlebar position 5b. Very soon it contacts plate 31, at 3ID. On further pressure it causes plate 31 and also the lever 10 to rotate about shaft 32. Since however, the serrated edges 33A and 37 do not come into contact, drum 33 is unmoved at whatever location pawl 36a requires. In other words, brake operation does not affect the gear changes in any way.
  • Figure 6 shows a different type of 'click' or ratchet movement operable by the same type of serrated gear-operating lever 10. Only that portion corresponding to drum 33 and its pawls 36a, 36b is shown.
  • Drum 45 is fast with inner annulus 44 having peripheral castellations 46 with angled faces.
  • This annulus 44 lies within surround 42 internally castellated at 43 and is outwardly biassed (47) in relation to the surround.
  • Portion 41 of support plate 40 (compare end plate 31 in Figs 2-4) has three inclined stepped ramps or faces 41a which cooperate with like structure 42a at the rearward side of surround 42.
  • Figure 7 shows an embodiment similar to tha " t of Fig.3 but with a different operating arrangement for drum 33.
  • drum 33 and its component parts 33B and 33C; and pawl 36 with its parts 36A, 36B and 36C, and biassing spring 37 are all as in Fig.3.
  • a cam 50 pivots about shaft 32 and is fixed relative to the brake-operating lever. Pawl 51 is biassed at 51a to engage teeth 33C unless the position of cam " B ' O prevents such engagement.
  • handle 10 To change gear in one direction, handle 10 is pulled; pawl 51 slides off the end of cam 50, engages a tooth, and pushes the drum one 'click' past pawl 36a. To change gear in the other direction, the handle 10 is pushed and shaft 34, attached in this case to extension 10a of lever 10, presses the pawl 36 down at 36a for the necessary escapement action in Fig.3.
  • Figure 8 shows a compensator arrangement.
  • Gear cable wire 15a' is interconnected by bar 53 pivoted at 53a and springbiassed at 53b between barrel 52, attached to wire 15a* and sheath 8a.
  • the outer sheath 15a is automatically moved by the bar 53 in a compensating manner to alter the effective length of the cable 15a.
  • Figure 9 shows a embodiment of wind-up drum and shaf generally equivalent to that of Figure 6.
  • Cover parts 91, 92 fit by recesses 91a, 92a, to lugs 93 around the periphery of a winding drum 94. These cover parts carry out one end a protruding part circular gear-number indicator 95.
  • Biassing spring 96 biasses in sequence, a face-tooth wheel 97, on a square shaft meshing for one-click movement with a complementary counterpart not shown, on the rear face of the drum; the drum; and a driving f ce-tooth wheel 98 but mounted for relative rotation and meshing for one-click movement at face gear 99 of the drum.
  • On the wheel 98, at the face outward from the drum is a release wheel arrangement 10D, with inclined ramps to mesh or disengage into the facing side of wheel 101.
  • drum 94 is rotated by lever 10, as in Figs 2, 3 or 4.
  • lever 10 To change to a higher gear, lever 10 is pushed forward. This turns wheel 101, mounted as part of a support or subframe (compare 31 in Figs 2 - 5). The ramps on this wheel 101 slide along ramps 100 on wheel 98, and so push wheel 98, bush 98a and ratchet disc along the shaft against biassing spring 96. However, the wheel 100 is meshed by face teeth with drum 94. This when the lever 10 is released, wheels 97, bush 98a and wheel 98 are all pressed back and the drum becomes located in the next ratchet space.
  • Slots 102 in end or case pieces 104 define a maximum extent of drum rotary travel and permit gear selection indicator 95 to protrude for inspection.
  • Figures 10a and 10b show a simple form of cable adjuster.
  • a cylindrical housing 114 Attached to bicycle frame 110, by an axial bolt 112 with outer knurled disc 112a rotational thereon, is a cylindrical housing 114 with generally tangential tubular extension 116.
  • a cam 118 formed in two parallel plates 118a, 118b.
  • a cable 120 passes into the tubular extension 116. Its wire 120a passes between the cam walls.
  • a shaped cam follower 122 is interposed, around wire 120a, between the cam 118 and cable sheath 120b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)

Abstract

Un ensemble combiné monté sur le guidon d'une bicyclette comprend un levier (10) d'actionnement des pignons et un levier (12) d'actionnement des freins qui permettent de changer les vitesses et de passer sur un plus petit rapport en tirant le levier (10) de façon à l'éloigner du levier (12) et de passer sur un plus grand rapport en poussant le levier (10) de façon à le faire pénétrer dans l'arrière en forme de canal du levier (12). Lorsqu'on tire le levier (12) afin d'actionner les freins, le rapport n'est pas affecté. A cet effet, un mécanisme utilise l'axe (32) du levier d'actionnement des freins pour tourillonner un tambour d'enroulement (33) du câble d'actionnement des pignons, à dents (33C) commandées par le cliquet d'échappement (36). Le levier (10) d'actionnement des pignons pivote sur l'organe de support (31), qui lui pivote autour de 32. Lorsque l'on tire le levier (10) pour l'éloigner du levier (12), le levier (10) s'incline premièrement autour de l'axe de pivotement de son organe de support, puis une extrémité crénelée (27) du levier (10) vient en prise avec la périphérie (33A) du tambour;l'organe de support (31) et le levier (10) pivotent ensuite ensemble autour de l'axe (32), remontant le tambour d'une unité, manuellement équivalente à une dent. Lorsque l'on pousse le levier (10) pour le rapprocher du levier (12), il aboute sur 31d et incline le support (31) en sens inverse horaire, de sorte que la protubérance (34) libère le cliquet d'échappement (36) et permet au tambour denté (33) de tourner. Lorsque l'on tire le levier (12) vers l'intérieur, tout l'ensemble interne pivote autour de 32; le levier (10) reste toutefois dans une position inchangée par rapport aux dentelures (33A) du tambour et à l'aboutement (31D), de sorte qu'il ne se produit pas de changement de vitesse.
EP19900902810 1989-02-11 1990-02-12 Ensemble d'actionnement combine des freins et des pignons Ceased EP0457799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8903117 1989-02-11
GB898903117A GB8903117D0 (en) 1989-02-11 1989-02-11 Bicycle gear change

Publications (1)

Publication Number Publication Date
EP0457799A1 true EP0457799A1 (fr) 1991-11-27

Family

ID=10651540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900902810 Ceased EP0457799A1 (fr) 1989-02-11 1990-02-12 Ensemble d'actionnement combine des freins et des pignons

Country Status (4)

Country Link
EP (1) EP0457799A1 (fr)
AU (1) AU5047890A (fr)
GB (1) GB8903117D0 (fr)
WO (1) WO1990009306A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3636530B2 (ja) * 1996-02-26 2005-04-06 株式会社シマノ 自転車用変速操作装置
US5799542A (en) * 1995-10-11 1998-09-01 Shimano, Inc. Bicycle shift control device
ITTO20010011A1 (it) * 2001-01-11 2002-07-11 Campagnolo Srl Gruppo integrato di comando del cambio e del freno per una bicicletta.
ITTO20010010A1 (it) * 2001-01-11 2002-07-11 Campagnolo Srl Gruppo integrato di comando del cambio e del freno per una bicicletta.
JP2019064356A (ja) * 2017-09-29 2019-04-25 株式会社シマノ 自転車用操作装置
TWM591065U (zh) * 2019-09-25 2020-02-21 彥豪金屬工業股份有限公司 自行車駐車煞車機構

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100820A (en) * 1976-09-13 1978-07-18 Joel Evett Shift lever and integral handbrake apparatus
DE3136922A1 (de) * 1981-09-17 1983-03-31 Hans Christian Ing.(grad.) 5042 Erftstadt Smolik Schrittschalteinrichtung
DE3916919A1 (de) * 1989-05-24 1989-11-09 Peter Ziemer Betaetigungsvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9009306A1 *

Also Published As

Publication number Publication date
GB8903117D0 (en) 1989-03-30
AU5047890A (en) 1990-09-05
WO1990009306A1 (fr) 1990-08-23

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