WO2002057127A1 - Bicyclette entrainee par la roue avant et par la roue arriere - Google Patents

Bicyclette entrainee par la roue avant et par la roue arriere Download PDF

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Publication number
WO2002057127A1
WO2002057127A1 PCT/AT2002/000004 AT0200004W WO02057127A1 WO 2002057127 A1 WO2002057127 A1 WO 2002057127A1 AT 0200004 W AT0200004 W AT 0200004W WO 02057127 A1 WO02057127 A1 WO 02057127A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
front wheel
wheel
pump
pressure
Prior art date
Application number
PCT/AT2002/000004
Other languages
German (de)
English (en)
Inventor
Rainer Meditz
Original Assignee
Rainer Meditz
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 Rainer Meditz filed Critical Rainer Meditz
Publication of WO2002057127A1 publication Critical patent/WO2002057127A1/fr

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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
    • B62M19/00—Transmissions characterised by use of non-mechanical gearing, e.g. fluid gearing
    • 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
    • B62M23/00—Transmissions characterised by use of other elements; Other transmissions

Definitions

  • the invention relates to a bicycle with front and rear wheel drive with a mechanical power transmission to the rear wheel and a fluid mechanical power transmission from the rear wheel to the front wheel, with a fluid pump mechanically coupled to the rear wheel and a fluid motor mechanically coupled to the front wheel, the fluid pump being connected to the by means of a pressure line Fluid motor is connected.
  • Bikes driven on both wheels have the advantage that heavy, swampy, steep, rough, snow-covered and similar terrain can be driven on more easily with them.
  • the two-wheel drive has so far not been able to prevail in bicycles, since previous approaches to building have been complicated and involve poorer manageability, additional weight and manufacturing costs or lead to a significant deterioration in the drive efficiency. The biggest obstacle was the question of how the power required for the drive can be easily brought to the front wheel.
  • Such proposed solutions include e.g. the manual additional drive for the front wheel of a bicycle by means of a hand crank from the handlebar (WO 96/24520 AI).
  • a major disadvantage is that the driving force for the front wheel must be provided by the hands.
  • US4546990 and US4684143 describe the use of a hydraulic drive device for bicycles.
  • the displacement volume of a hydraulic displacement pump is changed depending on the pressure in the hydraulic line, so that the drive ratio adapts to changing driving and terrain conditions constant pedaling resistance is sought. Mention is also made of the possibility of allowing the drive to act not only on one wheel, but on both wheels.
  • a disadvantage of these drive devices is that the power to the main drive wheel - usually the rear wheel - is also transmitted via the hydraulic line.
  • Mechanical power transmission - e.g. via gears and chain - usually achieves a much better degree of efficiency than a hydraulic system. The largest possible proportion of the drive power should therefore be transferred mechanically.
  • FR 2 563 799 AI describes the use of a hydraulic coupling for driving the front wheel of a motorcycle in addition to the rear wheel. This transfers the rotary motion of the rear wheel to the front wheel via the hydraulic coupling.
  • a disadvantage of this device is that, especially at higher driving speeds, a large amount of hydraulic fluid circulates, flow losses occur and the efficiency is reduced.
  • the object of the invention is to provide, in a simple manner, the advantages of mechanical power transmission - high efficiency and high transferable power with low weight - with the advantages of fluid mechanical power transmission - simple power transmission without impairing the steerability of the front wheel for the at least occasionally two-wheel drive of a bicycle connect.
  • the drive power should be mechanically transmitted to the rear wheel and the fluid mechanical coupling - consisting of a fluid pump mechanically coupled to the rear wheel and a fluid motor mechanically coupled to the front wheel - should only be effective when it is required.
  • the fluid pump is a pump with a variable displacement volume.
  • the fluid motor has a displacement volume dimensioned such that the rear wheel and front wheel are driven at approximately the same peripheral speed when the pump displacement volume is set to a maximum. Drive power is transmitted from the rear wheel to the front wheel. If a pure rear-wheel drive is desired, the displacement volume of the pump can be set to low or zero displacement volume.
  • Speed compensation device enables a corresponding advance of the front wheel. No drive power is transmitted to the front wheel.
  • a return line can be omitted and the air necessary for the power transmission can be sucked into the fluid pump, flow through the pressure line and blown out again on the fluid motor.
  • a return line to the fluid pump must be provided.
  • the speed compensation device described above can be, for example, a check valve arranged between the pressure and return line, which allows the front wheel to advance relative to the fluid motor.
  • the bicycle has a one-way clutch between the fluid motor and the front wheel.
  • the fluid mechanical coupling has a fluid pump with a variable displacement volume, which is changed depending on the pressure in the pressure line.
  • This pressure acts, for example, on a control connection for the adjustment of the displacement volume.
  • the pump is designed in such a way that the pressure at the control connection moves the pump towards a larger displacement volume when a minimum value is exceeded.
  • the displacement volume of the fluid motor and the displacement volume of the fluid pump at a low level are set so that a lower pressure is set at the same speed of the front and rear wheel.
  • the bicycle is then mainly driven by the rear wheel, only small quantities run through the pump, motor and line and the drive device is highly efficient.
  • the displacement volume of the fluid motor and the displacement volume of the fluid pump can also be dimensioned at a low level using a freewheel so that the fluid motor runs after the front wheel, for example via a freewheel - ie has a lower speed than the front wheel.
  • the fluid pump rotates faster than the fluid motor and there is a pressure increase from a certain speed difference, which increases the displacement volume of the pump and causes a large amount of fluid with high pressure to act as a driving force on the front wheel, i.e. one high driving force is transmitted to the front wheel.
  • the high driving force also acts on the front wheel; when it disappears, the pressure slowly drops and the bike is again mainly mechanically driven via the rear wheel.
  • a particularly advantageous embodiment is such that both the fluid pump and the fluid motor have a variable displacement volume, which is changed depending on the pressure in the pressure line.
  • the displacement volume of the fluid motor and the displacement volume of the fluid pump are each set at a low level so that at largely the same speed of the front and rear wheel only a small part of the drive line is transmitted to the front wheel, the larger part is mechanically transmitted to the rear wheel, with the above Advantage for the drive efficiency. If the rear wheel rotates faster than the front wheel, the pressure in the pressure line is increased and acts on the control connection for adjusting the displacement volume of both the fluid pump and the motor. By increasing the pressure, the pump and motor are adjusted towards a larger displacement and a large part of the drive energy is transferred to the front wheel. If the speed difference is reduced, the pressure decreases and the pump and motor reduce their displacement volume again. The transmission of the drive power shifts back to the rear wheel.
  • Fig. 2 is a Fig. 1 corresponding wiring diagram for pneumatic coupling
  • Fig. 3 is a wiring diagram for hydraulic coupling
  • Fig. 4 is a line diagram for hydraulic coupling, the displacement volume of the fluid pump and motor changes depending on the pressure in the pressure line
  • Fig. 1 shows a bicycle according to the invention in which the rear wheel (1) is driven in a conventional manner via a purely mechanical power transmission system by gears (2a, 2b) and chain.
  • the rear wheel (1) is coupled via a toothed belt (4) to a pneumatic pump with an adjustable displacement volume (5), which draws in air from the environment and feeds it into a pressure line (6).
  • the air flows in the pressure line (6) to the pneumatic motor (7), which is coupled to the front wheel (9) via toothed belts (8).
  • the pneumatic motor (7) releases the air back into the environment.
  • a feed of the pneumatic motor (7) is made possible by a speed compensation device in the form of a check valve (10).
  • Fig. 2 shows the line scheme belonging to Fig.l with the fluid pump (5) driven by the rear wheel (1), the pressure line (6), the fluid motor (7) driving the front wheel (9) and the check valve (10).
  • the fluid units (5, 7) can expediently also be integrated directly into the wheels (1,9).
  • FIG. 3 When hydraulic fluid is used as the pressure medium (FIG. 3), the medium flows in a circuit from the fluid motor (7) back to the fluid pump (5).
  • the system is therefore supplemented by a return line (11) and a storage tank (12) for hydraulic fluid.
  • This storage container (12) is connected to the lines via check valves (13).
  • Fig. 4 shows a further embodiment, in which the displacement volume of the hydraulic pump (5) is variably controlled by the pressure in the pressure line (6).
  • a hydraulically operated adjusting device (15a) is controlled via a control line (14a).
  • the displacement volume increases with increasing pressure.
  • the displacement volume of the hydraulic motor (7) is increased with increasing pressure in the pressure line (14b, 15b, 16b).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

L'invention concerne une bicyclette entraînée par la roue avant et par la roue arrière. Cette bicyclette présente une transmission d'énergie à la roue arrière (1) et une transmission d'énergie hydromécanique de la roue arrière (1) à la roue avant (9). Elle présente également une pompe hydraulique (5) accouplée mécaniquement à la roue arrière (1) et un moteur hydraulique (7) accouplé mécaniquement à la roue avant. La pompe hydraulique (5) est raccordée au moteur hydraulique (7) au moyen d'une conduite sous pression (6). L'objectif de l'invention est de combiner facilement les avantages d'une transmission d'énergie mécanique, à savoir rendement élevé et puissance transmissible élevée pour un poids faible, aux avantages d'une transmission d'énergie hydromécanique, à savoir simplicité de la transmission de puissance, sans affecter le rayon de braquage de la roue avant, pour entraîner une bicyclette au moins temporairement au moyen des deux roues. Afin de permettre l'obtention d'un rendement élevé, la puissance d'entraînement est transmise mécaniquement par l'intermédiaire de la roue arrière (1) et l'accouplement hydromécanique à la roue avant (9) est activé uniquement si nécessaire.
PCT/AT2002/000004 2001-01-17 2002-01-10 Bicyclette entrainee par la roue avant et par la roue arriere WO2002057127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA70/2001 2001-01-17
AT702001A AT410309B (de) 2001-01-17 2001-01-17 Fahrrad mit vorder- und hinterradantrieb

Publications (1)

Publication Number Publication Date
WO2002057127A1 true WO2002057127A1 (fr) 2002-07-25

Family

ID=3591991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2002/000004 WO2002057127A1 (fr) 2001-01-17 2002-01-10 Bicyclette entrainee par la roue avant et par la roue arriere

Country Status (2)

Country Link
AT (1) AT410309B (fr)
WO (1) WO2002057127A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034154A1 (fr) * 2005-09-20 2007-03-29 David Thomson Wallace Engrenage conique et bicyclette à transmission intégrale
EP2520482A1 (fr) * 2011-05-04 2012-11-07 Antonios Mastrokalos Bicyclette avec propulsion à engrenage
DE102019006512A1 (de) 2019-09-13 2020-08-06 Georg Egger Rein durch Muskelkraft betriebenes Fahrzeug
WO2020157524A1 (fr) * 2019-02-01 2020-08-06 Sarbanis Lampros Vélo à deux roues motrices avec assistance hydraulique de roue avant

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823959A (en) 1971-12-29 1974-07-16 R Winters Two wheel drive bicycle
US4546990A (en) 1983-09-06 1985-10-15 Harriger George A Hydraulic drive system for bicycles and the like
US4684143A (en) 1985-04-05 1987-08-04 Yasunori Sato Two-wheeled vehicle with hydraulic transmission
US4688815A (en) * 1984-03-27 1987-08-25 Lectrolarm Custom Systems, Inc. Hydraulically driven bicycle
US5054572A (en) 1990-06-20 1991-10-08 Parker James G Front wheel drive system for a motorcycle
US5224725A (en) 1990-05-10 1993-07-06 Erlston Lester J Two-wheeled-drive two wheeled vehicle
WO1996024520A1 (fr) 1995-02-10 1996-08-15 Wayne Charles Chalfant Systeme d'entrainement pour roue avant de bicyclette
EP0798202A1 (fr) * 1996-03-02 1997-10-01 Siegfried Hieble Motocyclette à roue avant motrice
WO1997041024A1 (fr) 1996-04-26 1997-11-06 Christini Steven J Bicyclette a deux roues motrices
EP0814016A1 (fr) 1996-06-19 1997-12-29 Shimano Inc. Dérailleur avant pour bicyclette
DE19630447A1 (de) * 1996-07-27 1998-01-29 Eckhard Dr Ing Oster Hydrostatischer Antrieb mit Steuereinheit für Zweiräder
EP0855336A1 (fr) 1997-01-23 1998-07-29 Claudio Roberto Suardi Bicyclette à entraínement sur les deux roues
DE19744608A1 (de) * 1997-10-09 1999-04-15 Geiser Herold Marc Rene Stufenlos verstellbares hydrostatisches Kompaktgetriebe für Fahrräder
EP0937600A2 (fr) 1998-02-19 1999-08-25 Hitachi, Ltd. Système de transmission hybride incorporé dans une véhicule ou bicyclette

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563799A1 (fr) * 1984-05-03 1985-11-08 Vachoux Andre Transmission hydraulique sur motocycles entre roue arriere et roue avant

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823959A (en) 1971-12-29 1974-07-16 R Winters Two wheel drive bicycle
US4546990A (en) 1983-09-06 1985-10-15 Harriger George A Hydraulic drive system for bicycles and the like
US4688815A (en) * 1984-03-27 1987-08-25 Lectrolarm Custom Systems, Inc. Hydraulically driven bicycle
US4684143A (en) 1985-04-05 1987-08-04 Yasunori Sato Two-wheeled vehicle with hydraulic transmission
US5224725A (en) 1990-05-10 1993-07-06 Erlston Lester J Two-wheeled-drive two wheeled vehicle
US5054572A (en) 1990-06-20 1991-10-08 Parker James G Front wheel drive system for a motorcycle
WO1996024520A1 (fr) 1995-02-10 1996-08-15 Wayne Charles Chalfant Systeme d'entrainement pour roue avant de bicyclette
EP0798202A1 (fr) * 1996-03-02 1997-10-01 Siegfried Hieble Motocyclette à roue avant motrice
WO1997041024A1 (fr) 1996-04-26 1997-11-06 Christini Steven J Bicyclette a deux roues motrices
EP0814016A1 (fr) 1996-06-19 1997-12-29 Shimano Inc. Dérailleur avant pour bicyclette
DE19630447A1 (de) * 1996-07-27 1998-01-29 Eckhard Dr Ing Oster Hydrostatischer Antrieb mit Steuereinheit für Zweiräder
EP0855336A1 (fr) 1997-01-23 1998-07-29 Claudio Roberto Suardi Bicyclette à entraínement sur les deux roues
DE19744608A1 (de) * 1997-10-09 1999-04-15 Geiser Herold Marc Rene Stufenlos verstellbares hydrostatisches Kompaktgetriebe für Fahrräder
EP0937600A2 (fr) 1998-02-19 1999-08-25 Hitachi, Ltd. Système de transmission hybride incorporé dans une véhicule ou bicyclette

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034154A1 (fr) * 2005-09-20 2007-03-29 David Thomson Wallace Engrenage conique et bicyclette à transmission intégrale
EP2520482A1 (fr) * 2011-05-04 2012-11-07 Antonios Mastrokalos Bicyclette avec propulsion à engrenage
WO2020157524A1 (fr) * 2019-02-01 2020-08-06 Sarbanis Lampros Vélo à deux roues motrices avec assistance hydraulique de roue avant
DE102019006512A1 (de) 2019-09-13 2020-08-06 Georg Egger Rein durch Muskelkraft betriebenes Fahrzeug

Also Published As

Publication number Publication date
ATA702001A (de) 2002-08-15
AT410309B (de) 2003-03-25

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