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WO1998036960A1 - Derailleur de bicyclette - Google Patents

Derailleur de bicyclette Download PDF

Info

Publication number
WO1998036960A1
WO1998036960A1 PCT/AT1998/000036 AT9800036W WO9836960A1 WO 1998036960 A1 WO1998036960 A1 WO 1998036960A1 AT 9800036 W AT9800036 W AT 9800036W WO 9836960 A1 WO9836960 A1 WO 9836960A1
Authority
WO
WIPO (PCT)
Prior art keywords
crank
sprockets
guide
shift
cable
Prior art date
Application number
PCT/AT1998/000036
Other languages
German (de)
English (en)
Inventor
Josef Prajczer
Original Assignee
Josef Prajczer
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 Josef Prajczer filed Critical Josef Prajczer
Publication of WO1998036960A1 publication Critical patent/WO1998036960A1/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
    • B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
    • 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
    • B62M25/045—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated having single actuating means operating both front and 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
    • 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
    • B62M9/14—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 wheels being laterally shiftable

Definitions

  • the invention relates to a bicycle gear shift, with a manually operable switching device, the rotatable switching handle is connected via cables with a switching device for several crank sprockets and with a switching device for several rear axle sprockets.
  • Bicycle gear shifts of this type which are known in various designs, are associated with the deficiency that the bicycle chain runs obliquely from the respective crank sprocket to the respectively associated rear axle sprocket, which results in material wear and an increased effort.
  • the invention aims to provide a bicycle gear shift of the type specified in the introduction, which avoids the inclination of the bicycle chain between the crank sprockets and the rear axle sprockets and enables a perfect shifting of all gears, in particular of 28 gears.
  • the rotatable control handle of the switching device in the axial direction against a spring bias from a control handle position, in which it with a first cable guide pulley, which is attached to an actuating cable of the switching device for the chain change in the area of the rear axle sprockets, and with a second cable guide pulley, which guides an actuating cable of a crank sprocket guide element attached to it, is in engagement with common rotation, can be moved into a second control handle position, in which it is disengaged from the first cable guide pulley and only with the second cable guide pulley for the actuating cable of the in the bicycle frame transverse direction between side frame parts slidably arranged crank sprocket guide element for common rotation to offset the with the guide element ent connected crank sprockets in different switching positions, wherein in the first shift handle position when switching the rear axle sprockets, the crank sprocket guide element is moved in the transverse direction relative to the rear axle s
  • This construction eliminates any skewing of the bicycle chain with respect to the rear axle sprockets, thereby protecting the material and saving force that would otherwise be lost due to the friction between the bicycle chain and the associated sprocket.
  • the perfect shifting of all gears of the gear shift is achieved because the crank sprockets have sufficient freedom of movement.
  • crank sprocket guide element has a sliding part which is mounted on a sliding guide rod so as to be non-rotatable relative to it in the transverse direction of the frame, which is acted upon by the actuating cable attached to it and is provided with a fork which engages with a crank guide ring, which is mounted together with the crank sprockets on a crankshaft sleeve which is slidably mounted on the crankshaft.
  • a further sliding guide rod extends between the crankshaft and the rear axle sprockets between the frame side parts, on which a chain guide part is non-rotatably slidably supported, which is acted upon by an actuating rope which, together with the actuating rope of the crank sprockets, via the rope guide pulley in the first shift handle position is operated.
  • FIG. 1 shows a schematic side view of a part of the bicycle frame /
  • FIG. 2 shows a schematic front view of the frame part according to FIG. 1;
  • Figure 3 is a schematic section of the frame part along the line III-III in Fig. 1.
  • Fig. 4 is a plan view of the frame part of Fig.l; 5a, 5b, 5c show a schematic axial section of the shift handle and the associated shift parts of the gear shift;
  • FIG. 6 shows a highly schematic top view of FIG. 5a
  • FIG. 7 shows a schematic cross section through the housing of the switching device along the line VII-VII in FIG. 5b;
  • FIGS. 8a to 8d details from FIG. 5a; 9a, 9b details of the control handle in axial section;
  • Fig. 14 in section a further detail of the crank ring guide.
  • the bicycle frame shown only partially and in a highly schematic manner in FIGS. 1 to 4 has a bicycle fork A and a bicycle fork guide B connected to a handlebar C, as is common with every bicycle.
  • the bicycle fork guide B is connected via a connecting rod D to a bicycle saddle holder I and via fork-shaped frame connecting rods E to a holder F for a crankshaft and a crank bearing G.
  • the crankshaft bracket F is connected via frame connecting rods H to the saddle bracket I, which in turn is connected via struts J to a rear axle bracket N, from which frame parts E 'extend to the bracket F.
  • the actual bicycle gearshift which is intended for 28 gears, has 4 crank sprockets and 7 rear axle sprockets and, according to FIGS. 5 to 8, essentially has the following components: a circuit housing part 1, which is fixed to a handlebar 3 by means of screws 1 ', and a circuit housing - part 2, which is connected 1 "ver to the housing part 1 ⁇ means of screws. are in the housing part 1, as in detail Fig. 5c shows gear position hollows 13 and in the housing part 2 Gangpositi ⁇ onsmulden 14 is formed. On the outside of the housing is a position scale PS (Fig. 10) provided for the individual gear positions or the position of actuating cables A ', B' C of the gear shift.
  • the spring supports 7 are formed by swivel hooks mounted on the control handle S by means of screws 8 - Gripping screwed control handle screw 9 is used to pivot and fix the spring holders 7, which keep the spring 6 tensioned.
  • the disk 15 guiding the cables B ', C is provided with a semicircular elevation or a tooth 15' (FIG. 5c, FIG. 8b) which fits exactly into the position troughs 13 of the housing part 1.
  • the disk 15 should not be too difficult to be conveyed into the individual position troughs 13 by means of the control handle S.
  • the disc 15 there are also the matching recesses 20 for the two engagement teeth 20 '(FIGS. 5a, 8c) of the control handle S.
  • the number of recesses 20 depends on the number of crank sprockets.
  • the shift cables A ', B', C which serve to adjust the individual positions of the chain K, are fixed to the disks 15, 16 with the aid of cable fixings 17.
  • the shift cables A ', B', C are actuated by means of the shift handle S as a result of the engagement of the teeth 15 ', 16' of the disks 15, 16 in the gear position recesses 13, 14.
  • a spring 18 is provided, the spring force directed against the housing parts 1, 2 may neither be chosen too strong nor too weak in order to enable a comfortable change of the switching positions.
  • a certain play 19 (FIG. 8c) is provided between the handlebar 3 and the control handle S.
  • the number of position troughs 14 provided for the engagement of the tooth 16' in the housing part 2 depends on the number of crank sprockets and the rear axle sprockets and is 10 in the present example.
  • a circular recess 21 is provided in the housing part 2 for the reception or movement associated with the switching handle teeth 21 '(FIGS. 5a, 5b, 8d).
  • This recess 21 extends in the housing part 2 axially to a depth which is slightly more than the axial extent of the teeth 20 'so that these teeth 20' in the Shift handle position II come out of engagement with the disc 15.
  • crank ring guide 22 for displacing the crank sprockets 30 and thus for changing the chain K on the crank sprockets 30 when the rear axle switching device is not actuated.
  • the crank ring guide 22 is actuated by means of the cable A 'after pulling out the control handle S up to the stop (FIG. 5b) in the switching position II.
  • the rope positions previously reached with ropes B 'and C remain the same. Due to the inclined position of the chain K when the crank sprockets 30 are displaced, the chain K changes further by one position or by one crank sprocket 30 depending on the rotation of the control handle S in the clockwise or counterclockwise direction.
  • crank sprockets 30 are only moved in the transverse direction together with the chain changing on the rear axle sprockets, without the chain K being present changes on the crank sprockets.
  • crank ring guide 22 (FIGS. 10, 11) consists of a sliding part 22 'which slides on the oval cross-section sliding guide rod L and guide arms 22''connected to the sliding part 22'. To avoid excessive friction, there are small 22 '' on the two guide arms Bearing balls 22 "'provided. In addition, a device 22 1V is located on the sliding part 22' for fixing the rope A '.
  • a rear chain positioning device or switching device 23 which is assigned to the rear axle sprockets and is only indicated schematically in FIG. 1, is designed as in a conventional bicycle gearshift and is therefore not explained. 10
  • the chain K is brought to the desired rear axle sprocket when the control handle S is rotated clockwise or counterclockwise in the control handle position I (FIG. 5a) by actuating the switching device 23.
  • a central chain guide 24 (FIGS. 10, 12a, b) which is actuated simultaneously by means of the shifting cable C is used for guidance the chain K when switching the rear axle sprockets.
  • the chain guide 24 has a sliding piece 24 'with a fastening 24 "for the cable C and two curved arms, as shown in FIGS. 12c, 12b, and slides around on the sliding guide rod M with an oval cross section when changing the chain position in the transverse direction of the frame to prevent the slider 24 'from rotating on the slide guide rod M which extends between the side frame parts H (cf. FIG. 4).
  • Rope setting elements 25 on the housing 1, 2 enable fine adjustment of the ropes A ', B', C in the event of extreme temperature fluctuations and expansion loads (cf. FIGS. 6, 7).
  • the guide ring 27 of the crank ring guide 22 assigned to the crank sprockets 30 is brought into the desired position according to FIG. 11 with the aid of the actuating cable A '.
  • the guide ring 27 has no teeth and also serves as a chain guard. 13, there are recesses 27 'against the center or radially inwards, which engage in the teeth 29' of a crankshaft sleeve 29 which supports the crank ring teeth 30.
  • the crankshaft 28 is provided with teeth 28 'which engage in recesses 29 "of the crankshaft sleeve 29.
  • crankshaft 28 With the help of the pedals P, the crankshaft 28 and crankshaft sleeve 29, the sprockets and the chain K, the wheels R of the bicycle move.
  • the crankshaft 28 is designed as a square at both ends in order to be able to fasten the pedals P, and has threaded holes at both ends for fastening the pedal arms by means of screws P '.
  • crank sprockets 30 themselves are attached to the crankshaft sleeve 29 as well as the crank guide ring 27.
  • the crank sprockets 30 are provided with external teeth for the transport of the chain K and with a center or.
  • Threaded holes 36 are provided for fixing the rings 27, 30 to one another and to a stop 37 of the crankshaft sleeve 29.
  • crank sprockets 30 With four crank sprockets 30 according to the exemplary embodiment shown, the guide ring 27 and a given distance between the guide ring 27 and the ball bearing G, the stood “x" (Fig. 10) between the crankshaft sleeve 29 and the opposite crank bearing G so large that ten switching positions remain free.
  • a shift position or gear position means a distance between two sprockets 30.
  • the crank sprockets 30 and the Schuachszahnkränze must be coordinated with each other ⁇ that no position or no gear gives the same translation.
  • Rope sheath indicated. 33 each designates a cable sheathing holder and 34 cable fixings on the ring guides.
  • Control handle position I ropes A '/ B' + C can be actuated;
  • Control handle position II only rope A 'can be operated (control handle is pulled out as far as it will go).
  • the individual positions can be set by turning the control handle S.
  • control handle position I the positions can be switched from 3 to 9;
  • crank sprockets and six rear axle sprockets could also be provided at the front.

Landscapes

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

Abstract

L'invention concerne un dérailleur de bicyclette comprenant un dispositif de commande actionnable manuellement, dont la poignée (S) est reliée par l'intermédiaire de câbles de commande (A', B', C') avec un dispositif de commande pour plusieurs pignons de manivelle et avec un dispositif de commande pour plusieurs pignons de l'essieu arrière. La poignée rotative peut passer d'une position (I) dans laquelle elle sollicite un câble d'actionnement (B') pour déplacer la chaîne dans la zone des pignons de l'essieu arrière et un câble d'actionnement (A') d'un élément de guidage du pignon de manivelle (27), dans une seconde position (II) où elle ne sollicite que le câble d'actionnement (A') de l'élément de guidage du pignon de manivelle (27) monté coulissant dans le sens transversal du cadre entre des parties latérales (E) du cadre, afin de déplacer les pignons de manivelle (30) qui y sont liés, dans différentes positions de commande. Dans la première position (I) de la poignée, lorsque les pignons de l'essieu arrière sont engagés, l'élément de guidage du pignon de manivelle (27) est déplacé dans le sens transversal par rapport aux pignons de l'essieu arrière.
PCT/AT1998/000036 1997-02-21 1998-02-20 Derailleur de bicyclette WO1998036960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA291/97 1997-02-21
AT29197A AT406365B (de) 1997-02-21 1997-02-21 Fahrradgangschaltung

Publications (1)

Publication Number Publication Date
WO1998036960A1 true WO1998036960A1 (fr) 1998-08-27

Family

ID=3486651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1998/000036 WO1998036960A1 (fr) 1997-02-21 1998-02-20 Derailleur de bicyclette

Country Status (2)

Country Link
AT (1) AT406365B (fr)
WO (1) WO1998036960A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1095847A1 (fr) * 1999-10-27 2001-05-02 HANS HELMIG GmbH Dispositif de manoeuvre pour dérailleurs de bicyclette avec double système de traction
FR2849826A1 (fr) * 2003-01-15 2004-07-16 Etcetera Selecteur de vitesses a developpements predetermines, notamment pour cycle
EP1462354A2 (fr) 2003-03-26 2004-09-29 HONDA MOTOR CO., Ltd. Transmission pour bicyclette
EP1580114A3 (fr) * 2004-03-24 2006-05-24 Shimano Inc. Transmision de bicyclette
CN1847082B (zh) * 2005-04-15 2010-06-02 本田技研工业株式会社 自行车用变速装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992013752A1 (fr) * 1991-02-12 1992-08-20 Boyle Malachy Gerard O Perfectionnement concernant les bicyclettes
DE4129198A1 (de) * 1991-09-03 1993-03-04 Heinz Mueller Kettenschaltung fuer fahrraeder
WO1995013209A1 (fr) * 1993-11-10 1995-05-18 Hugelshofer, Werner, Alfred Dispositif de changement de vitesse pour deux-roues
GB2297528A (en) * 1995-01-31 1996-08-07 John James Lindsay Slidably adjustable front chainring axle of a bicycle
EP0727348A1 (fr) * 1995-02-15 1996-08-21 Franck Savard Procédé de sélection de développements pour un vélo avec alignement de chaîne adéquat et dispositif de sélection associé

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR801056A (fr) * 1935-06-18 1936-07-27 Triumph Company Ltd Mécanisme de changement de vitesses pour véhicules commandés par chaîne
FR2610060B1 (fr) * 1987-01-27 1991-03-22 Suteau Lucien Dispositif de changement de vitesse pour transmission a chaine
US4938733A (en) * 1988-01-06 1990-07-03 Sram Corporation Bicycle gear shifting method and apparatus
DE69008298T2 (de) * 1989-10-20 1994-08-04 Campagnolo Srl Drehgriffvorrichtung zum Betätigen der Gangschaltungen eines Fahrrads.
US5476019A (en) * 1994-03-07 1995-12-19 Sram Corporation Rotatable handgrip actuating system
DE4420273A1 (de) * 1994-06-10 1995-12-14 Helmig Hans Gmbh Drehgriff zur Betätigung von Fahrradgangschaltungen
IL117109A0 (en) * 1995-02-15 1996-06-18 Savard Franck Method and device for selecting gears for a cycle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992013752A1 (fr) * 1991-02-12 1992-08-20 Boyle Malachy Gerard O Perfectionnement concernant les bicyclettes
DE4129198A1 (de) * 1991-09-03 1993-03-04 Heinz Mueller Kettenschaltung fuer fahrraeder
WO1995013209A1 (fr) * 1993-11-10 1995-05-18 Hugelshofer, Werner, Alfred Dispositif de changement de vitesse pour deux-roues
GB2297528A (en) * 1995-01-31 1996-08-07 John James Lindsay Slidably adjustable front chainring axle of a bicycle
EP0727348A1 (fr) * 1995-02-15 1996-08-21 Franck Savard Procédé de sélection de développements pour un vélo avec alignement de chaîne adéquat et dispositif de sélection associé

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1095847A1 (fr) * 1999-10-27 2001-05-02 HANS HELMIG GmbH Dispositif de manoeuvre pour dérailleurs de bicyclette avec double système de traction
FR2849826A1 (fr) * 2003-01-15 2004-07-16 Etcetera Selecteur de vitesses a developpements predetermines, notamment pour cycle
WO2004069639A1 (fr) 2003-01-15 2004-08-19 Etcetera Selecteur de vitesses a developpements predetermines, notamment pour cycles
US7849760B2 (en) 2003-01-15 2010-12-14 Etcetera Speed changer with pre-determined gears, particularly for cycles
EP1462354A2 (fr) 2003-03-26 2004-09-29 HONDA MOTOR CO., Ltd. Transmission pour bicyclette
EP1462354A3 (fr) * 2003-03-26 2007-10-10 HONDA MOTOR CO., Ltd. Transmission pour bicyclette
US7381143B2 (en) 2003-03-26 2008-06-03 Honda Motor Co., Ltd. Transmission apparatus for a bicycle
EP1580114A3 (fr) * 2004-03-24 2006-05-24 Shimano Inc. Transmision de bicyclette
US7258637B2 (en) 2004-03-24 2007-08-21 Shimano Inc. Bicycle transmission
CN1847082B (zh) * 2005-04-15 2010-06-02 本田技研工业株式会社 自行车用变速装置

Also Published As

Publication number Publication date
ATA29197A (de) 1999-09-15
AT406365B (de) 2000-04-25

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