DE3908385C1 - Pedal-crank drive - Google Patents

Pedal-crank drive

Info

Publication number
DE3908385C1
DE3908385C1 DE3908385A DE3908385A DE3908385C1 DE 3908385 C1 DE3908385 C1 DE 3908385C1 DE 3908385 A DE3908385 A DE 3908385A DE 3908385 A DE3908385 A DE 3908385A DE 3908385 C1 DE3908385 C1 DE 3908385C1
Authority
DE
Germany
Prior art keywords
chain
front sprocket
primary
pinion
gear
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.)
Expired - Lifetime
Application number
DE3908385A
Other languages
German (de)
Inventor
Heinz 4270 Dorsten De Mueller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE3908385A priority Critical patent/DE3908385C1/en
Application granted granted Critical
Publication of DE3908385C1 publication Critical patent/DE3908385C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B62M9/131—Front derailleurs
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

Pedal-crank drive with two chain circuits lying one behind the other in the power flow and a shiftable chain gear in the primary circuit, and having a front sprocket arranged in an axially displaceable manner in this circuit. In order to avoid the off-course running of the chain from the front sprocket to the individual pinions, the drive is divided up into two chains lying one behind the other in the power flow. The two circuits jointly use an additional spindle which receives the torque via the chain and the gear-shifting pinions and transmits it via the secondary front sprocket and the secondary chain to the rear-wheel pinion. In addition to this chain the primary chain circuit includes the axially moving primary front sprocket and the additional joint spindle with the pushed-on gear-changing pinions. At the same time, this spindle including the secondary front sprocket belongs to the secondary chain and the rear-wheel pinion belongs to the secondary chain circuit. The axially displaceable primary front sprocket is in each case displaced into a position which lies opposite the gear-shifting pinion occupied by the primary chain. As a result, the ideal chain line is always maintained. The secondary chain runs from the secondary front sprocket to the driving pinion of the rear wheel. Here too the ideal chain line is maintained.

Description

Die Erfindung betrifft ein axial verschiebliches Kettenblatt, welches im Primärkettenkreislauf die Einhaltung der idealen Kettenlinie dadurch sicherstellt, daß es jeweils in eine Position gebracht wird, die dem gewähltem Schaltritzel exakt gegenüberliegt.The invention relates to an axially displaceable chainring, which in Primary chain circuit thereby maintaining the ideal chain line ensures that it is placed in a position appropriate to the selected gear pinion is exactly opposite.

Bei den bisher bekannten Systemen zur Drehmomentübertragung mittels Kette befinden sich auf der Hinterrad-Achse mehrere Zahnkränze mit unterschied­ lichen Zahnzahlen (Ritzeln). Die Kette wird mittels einer Vorrichtung auf ein bestimmtes Ritzel umgelenkt. Hierbei wird die Kette in axialer Richtung verschoben, wobei das Kettenrad seine Position beibehält.In the previously known systems for torque transmission by means of a chain there are several sprockets with a difference on the rear wheel axle the number of teeth (pinions). The chain is by means of a device on a specific pinion redirected. Here, the chain is moved in the axial direction, whereby the sprocket maintains its position.

Der exakte Geradeauslauf der Kette kann tatsächlich aber nur bei einem, meist dem mittleren, Ritzel erfolgen. In allen anderen "Gängen" läuft die Kette umso schräger, je weiter das gewählte Ritzel von diesem mittleren Ritzel entfernt ist. Auch eine asymmetrische Einspeichung des Hinterrades oder die unsymme­ trische Gestaltung der Hinterradgabel bzw. der Ausfallenden kann den Schräglauf der Kette höchstens vermindern und erfordert erheblichen konstruk­ tiven Mehraufwand.The exact straight running of the chain can actually only be achieved with one, usually the middle, Pinion. In all other "gears" the chain runs all the more obliquely, the further the selected pinion is from this middle pinion. Also asymmetrical spokes on the rear wheel or the asymmetrical tric design of the rear fork or the dropouts can Reduce skewing of the chain at most and requires considerable construct tive additional effort.

Beim Schräglauf der Kette treten Probleme auf, wie z. B. schweres Schalten erhöhter Ketten- und Ritzelverschleiß sowie störende Geräuschentwicklung. Problems occur when the chain is skewed, e.g. B. difficult shifting increased chain and sprocket wear and annoying noise.  

Dieser heutige Standard ist aus dem Buch "Fahrradtechnik" von Siegfried Rauch und Fritz Winkler (Bielefelder Verlangsanstalt KG) zu entnehmen.This standard today is from the book "Fahrradtechnik" by Siegfried Rauch and Fritz Winkler (Bielefelder Verlangsanstalt KG) refer to.

Aus der CH-PS 1 67 357 ist ein aus mindestens zwei Kettenkreisläufen bestehender Tretkurbelbetrieb bekannt, bei dem der Antrieb mittels Nebenschaltung im Primärkreislauf geschaltet wird.From CH-PS 1 67 357 is one of at least two chain circuits of existing pedal crank operation are known, in which the drive is switched in the primary circuit by means of a secondary connection.

Die Probleme des Kettenschräglaufs treten bei Nabenschaltungen nicht auf.The problems of chain skewing occur with hub gears not on.

Zwar ist aus der AE-PS 1 02 122 eine Kettenschaltung mit axial verschieblichem Ritzelpaket bekannt, bei der aber nur eine geradelaufende Kette verwendet wird, und die breit baut.AE-PS 1 02 122 is actually a derailleur system known with axially displaceable pinion package, in which but only a straight chain is used, and that builds broadly.

Aufgabe der vorliegenden Erfindung ist es, den Geradeaus­ lauf der Kette auch bei einer Kettenschaltung einfach sicher­ zustellen.The object of the present invention is to keep straight the chain runs safely even with a derailleur deliver.

Diese Aufgabe wird durch das axial verschiebliche Kettenrad gelöst, welches zwischen der Kurbelachse und den Unterrohren liegt und die Antriebskraft über zwei hintereinanderliegende Ketten überträgt.This task is solved by the axially displaceable chain wheel, which lies between the crank axle and the down tubes and the driving force transmitted over two successive chains.

Erreicht wird dies, indem die Schaltritzel nicht auf der Hinter­ radachse, sondern auf einer zusätzlichen Achse angeordnet sind, die sich zwischen der Tretkurbelachse und der Hinterradachse befindet.This is achieved by not having the shift pinion on the rear wheel axis, but are arranged on an additional axis, which is between the Pedal crank axle and the rear wheel axle is located.

Auf dieser Zusatzachse gibt das zweite Kettenrad (Sekundärkettenrad) in der bei bisherigen Systemen üblichen Weise den Kraftfluß zum Hinterrad weiter.On this additional axis there is the second sprocket (secondary sprocket) in the usual way in previous systems the flow of power to Rear wheel continues.

Das Antriebs (Primär-) Kettenrad umschließt mit seiner inneren Umfangs­ fläche paßgenau die entsprechend geformte Außenfläche der zugehörigen Achse und gleitet axial jeweils um den gleichen Weg, um den die Primär-(Schalt-)kette bei der Umschaltung axial bewegt wird.The drive (primary) sprocket encloses with its inner circumference surface, the correspondingly shaped outer surface of the associated axis and slides axially each by the same route that the Primary (switching) chain is moved axially when switching.

Das angetriebene Primärkettenrad liegt daher in jedem Gang dem benutzten Schaltritzel genau gegenüber.The driven primary sprocket is therefore in everyone Corridor used Shift pinion exactly opposite.

Hieraus ergibt sich der weitere Vorteil, den Achsabstand im Primärketten­ trieb klein zu halten und somit die Kette genauer zu führen.This results in another advantage, the center distance in the primary chain urged to keep small and thus to guide the chain more precisely.

Außerdem können die Schaltritzel zwischen den Unterrohren und somit vor dem Hinter­ rad angeordnet werden. In addition, the shift pinion between the down tubes and thus in front of the rear be arranged rad.  

Die Notwendigkeit der Kapselung des Primärkettenkreislaufes bei einer Kettenschaltung unter Verwendung des verschieblichen Kettenrades wirkt sich als mehrfacher Vorteil jedoch insofern aus, als daß die Funktions­ sicherheit - im Gegensatz zu bisherigen Systemen - sichergestellt würde, die Witterungseinflüsse mit allen ihren Nachteilen verhindert, die Wartungsarbeiten minimiert und nicht zuletzt ein Schutz des Fahrers und seiner Kleidung erfolgen würde.The need to encapsulate the primary chain circuit in one Derailleur using the sliding sprocket works but as a multiple advantage in that the functional security - in contrast to previous systems - ensured would prevent the weather influences with all their disadvantages, minimizes maintenance work and, last but not least, protects the driver and his clothes would be done.

Eine Variation in der Anordnung des neuen axial verschieblichen Ketten­ rades ist möglich, indem dieses nicht um die Tretkurbelachse, sondern um die zusätzliche Achse dreht.A variation in the arrangement of the new axially movable chains Rades is possible by this not around the pedal crank axis, but around the additional axis rotates.

Ausführungsbeispiele des Tretkurbeltriebs werden anhand der Zeichnung erläutert. Es zeigtEmbodiments of the pedal crank drive are explained using the drawing. It shows

Fig. 1 eine Draufsicht auf ein erstes Ausführungsbeispiel, Fig. 1 is a plan view of a first embodiment,

Fig. 2 eine Draufsicht auf ein weiteres Ausführungsbeispiel, Fig. 2 is a plan view of another embodiment,

Fig. 3 und 4 die Seitenansichten gemäß Fig. 1, 2. FIGS. 3 and 4, the side views of FIG. 1, 2.

Die Nummer 5 A stellt die besonders geformte Oberfläche der Achse für das verschiebliche Kettenrad dar, damit dieses neben seinem axialen Gleiten auch das Drehmoment weitergeben kann.The number 5 A represents the specially shaped surface of the axle for the sliding sprocket so that it can also transmit the torque in addition to its axial sliding.

Die über das Primärkettenrad 1 A, 5 A laufende Primärkette gibt das Drehmoment über ein um die zusätzliche Achse 2 A drehendes Ritzel 1 A, 5 B und somit auch auf das Sekundärketten­ rad 3 A mit der gleichen Drehrichtung weiter. Vom Sekundärkettenrad 3 A läuft die Antriebskette 3 C (Sekundärkette) zum Ritzel des Hinterrades. Auch hierbei wird die ideale Kettenlinie eingehalten.The primary chain sprocket 1 A , 5 A passes the torque via a sprocket 1 A , 5 B rotating around the additional axis 2 A and thus also to the secondary chain wheel 3 A with the same direction of rotation. The drive chain 3 C (secondary chain ) runs from the secondary chain wheel 3 A to the pinion of the rear wheel. The ideal chain line is also maintained here.

Weiterhin können die genannten Nachteile (schweres Schalten, Geräusch­ entwicklung, asymmetrische Einspeichung, unsymmetrische Rahmengestaltung) wegfallen.Furthermore, the disadvantages mentioned (difficult switching, noise development, asymmetrical insertion, asymmetrical frame design) fall away.

Claims (2)

1. Tretkurbeltrieb für ein Fahrrad mit zwei im Kraftfluß hintereinanderliegenden Kettenkreisläufen und einem schaltbaren Kettengetriebe im Primärkreislauf, gekennzeichnet durch ein im Primärkettentrieb dergestalt axial verschiedlich angeordnetes Kettenrad, das jeweils in eine Position gebracht wird, in der es dem in Eingriff befindlichen Ritzel des Ritzelpakets gegenüberliegt.1. Pedal crank drive for a bicycle with two chain circuits lying one behind the other in the power flow and a switchable chain transmission in the primary circuit, characterized by a sprocket axially differently arranged in the primary chain drive, which is brought into a position in which it is opposite the engaged pinion of the sprocket set. 2. Tretkurbeltrieb nach Anspruch 1, dadurch gekennzeichnet, daß der Primärkreis­ lauf eingekapselt ist.2. Pedal crank drive according to claim 1, characterized in that the primary circuit barrel is encapsulated.
DE3908385A 1989-03-15 1989-03-15 Pedal-crank drive Expired - Lifetime DE3908385C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3908385A DE3908385C1 (en) 1989-03-15 1989-03-15 Pedal-crank drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3908385A DE3908385C1 (en) 1989-03-15 1989-03-15 Pedal-crank drive

Publications (1)

Publication Number Publication Date
DE3908385C1 true DE3908385C1 (en) 1990-06-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE3908385A Expired - Lifetime DE3908385C1 (en) 1989-03-15 1989-03-15 Pedal-crank drive

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935634A1 (en) * 1989-10-26 1991-05-02 Gerhard Ellsaesser Belt drive for bicycle - has primary transmission with chain drive to reduce torque
FR2670174A1 (en) * 1990-12-07 1992-06-12 Boland Gerard SOLIDARITY INTERMEDIATE TRAYS FOR BICYCLES.
DE4129198A1 (en) * 1991-09-03 1993-03-04 Heinz Mueller Derailleur gearchange for bicycle - has sprockets on rear block moved to change gear, instead of chain
FR2755935A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
FR2755936A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
FR2755934A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
WO1998022333A1 (en) 1996-11-15 1998-05-28 Hubert Mourer Driving device for a crank gear machine
WO2002008050A1 (en) * 2000-07-21 2002-01-31 Van Der Linde Freddy Gear for a bicycle
WO2006087750A1 (en) * 2005-02-16 2006-08-24 Daniele Cappellini Transmission case for bicycles
US7361109B2 (en) * 2005-05-31 2008-04-22 Kilshaw Richard J Bicycle gear set
US7597638B2 (en) 2004-08-31 2009-10-06 Sram, Llc Transmission
USD789169S1 (en) 2016-03-16 2017-06-13 Temper Axle Products Corporation Retaining ring pliers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102122C (en) *
DE167357C (en) * 1900-01-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102122C (en) *
DE167357C (en) * 1900-01-01

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935634A1 (en) * 1989-10-26 1991-05-02 Gerhard Ellsaesser Belt drive for bicycle - has primary transmission with chain drive to reduce torque
FR2670174A1 (en) * 1990-12-07 1992-06-12 Boland Gerard SOLIDARITY INTERMEDIATE TRAYS FOR BICYCLES.
WO1992010394A1 (en) * 1990-12-07 1992-06-25 Boland Gerard Integral intermediate chain wheels for bicylces
DE4129198A1 (en) * 1991-09-03 1993-03-04 Heinz Mueller Derailleur gearchange for bicycle - has sprockets on rear block moved to change gear, instead of chain
FR2755935A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
FR2755936A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
FR2755934A1 (en) * 1996-11-15 1998-05-22 Mourer Hubert Drive transmission for pedal bicycle
WO1998022333A1 (en) 1996-11-15 1998-05-28 Hubert Mourer Driving device for a crank gear machine
WO2002008050A1 (en) * 2000-07-21 2002-01-31 Van Der Linde Freddy Gear for a bicycle
JP2004504229A (en) * 2000-07-21 2004-02-12 ヴァン・デル・リンデ、ペトラス、マリア Bicycle gear device
US7326137B2 (en) 2000-07-21 2008-02-05 Van Der Linde Petrus Maria Gear for a bicycle
US7597638B2 (en) 2004-08-31 2009-10-06 Sram, Llc Transmission
WO2006087750A1 (en) * 2005-02-16 2006-08-24 Daniele Cappellini Transmission case for bicycles
CN101119887B (en) * 2005-02-16 2012-05-30 D·卡普利尼 Transmission case for bicycles
US7361109B2 (en) * 2005-05-31 2008-04-22 Kilshaw Richard J Bicycle gear set
USD789169S1 (en) 2016-03-16 2017-06-13 Temper Axle Products Corporation Retaining ring pliers

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8322 Nonbinding interest in granting licences declared
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee
8370 Indication of lapse of patent is to be deleted
8339 Ceased/non-payment of the annual fee