EP1399359A1 - Entrainement par pedalier pour bicyclette - Google Patents

Entrainement par pedalier pour bicyclette

Info

Publication number
EP1399359A1
EP1399359A1 EP02753890A EP02753890A EP1399359A1 EP 1399359 A1 EP1399359 A1 EP 1399359A1 EP 02753890 A EP02753890 A EP 02753890A EP 02753890 A EP02753890 A EP 02753890A EP 1399359 A1 EP1399359 A1 EP 1399359A1
Authority
EP
European Patent Office
Prior art keywords
pedal crank
chain wheel
pedal
sprocket
carrying
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.)
Withdrawn
Application number
EP02753890A
Other languages
German (de)
English (en)
Inventor
Gerhard Hilber
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
Publication of EP1399359A1 publication Critical patent/EP1399359A1/fr
Withdrawn legal-status Critical Current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
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/10—Rider propulsion of wheeled vehicles involving devices which enable the mechanical storing and releasing of energy occasionally, e.g. arrangement of flywheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2164—Cranks and pedals
    • Y10T74/2165—Cranks and pedals with attached gear

Definitions

  • the invention relates to a pedal crank drive for a bicycle with two pedal cranks that are non-rotatably connected to one another via a pedal crank shaft, with a sprocket rotatably mounted on a bearing attachment of one of the two pedal cranks, and with a compression spring running in the circumferential direction between this pedal crank and an abutment for the compression spring carrying sprocket.
  • the invention is therefore based on the object to design a pedal crank drive for a bicycle of the type described above with simple constructive means such that the advantages of a pressure-transmitting force transmission spring between the pedal crank and the sprocket rotatably mounted on the pedal crank for a more uniform torque distribution over a pedal crank revolution can be used without the use of additional damping springs.
  • the invention achieves the stated object in that the pedal crank carrying the chain wheel engages with a projection protruding against the chain wheel in a recess of the chain wheel which forms rotary stops for this pedal crank in both circumferential directions.
  • the stop-limited, spring-loaded initial position of the sprocket relative to the pedal crank allows easy adjustment of the prestress of the compression spring.
  • the constructive solution to the mutual rotation limitation of the sprocket and pedal crank does not require any special additional effort, because on the pedal crank only a protrusion against the sprocket and a recess on the sprocket are provided, in which the approach engages with play in the circumferential direction.
  • This game determines the possible angle of rotation between the sprocket and pedal crank, which should not exceed 10 ° and will preferably be between 7 ° and 9 °.
  • the approach protruding against the sprocket also enables a force application in the central plane of the bearing for the sprocket in the stop position, which entails favorable bearing loads.
  • the compression spring which is arranged laterally next to the sprocket and runs in the circumferential direction and which finds its abutment on the sprocket side, preferably in a bracket that can be screwed onto the sprocket, causes a tilting moment the sprocket about an axis transverse to its axis of rotation.
  • the sprocket can be mounted on the bearing boss of the pedal crank with the help of two needle bearings, which have conical races and are installed with cone angles that open in opposite directions.
  • the pedal crank carrying the chain wheel can be extended via the pedal crank shaft to a two-armed lever, two compression springs, each supported on a lever arm of the lever, diametrically opposite one another with respect to the pedal crank shaft, between the pedal crank and the sprocket are provided.
  • This division into two rotationally symmetrically arranged compression springs allows the tilting moments that occur to be compensated, which allows the use of conventional roller bearings for mounting the sprocket, especially since the force limitation on the sprocket via the stop of the pedal crank protruding against the sprocket, again under advantageous load conditions, due to the stop-related rotation limitation he follows.
  • Show it 1 shows a pedal crank drive according to the invention for a bicycle in a simplified side view
  • Fig. 3 shows an axial section through the sprocket mounted on the pedal crank in the area of its storage on a larger scale
  • Fig. 4 is a representation corresponding to FIG. 1 of a construction variant of a pedal crank drive according to the invention.
  • the pedal crank drive according to the exemplary embodiment according to FIGS. 1 to 3 essentially consists of a pedal crank shaft 1 which is rotatably held in a bearing of a bicycle frame and which carries two pedal cranks 2 provided in the usual manner with pedals, and a chain wheel 3 on which at least one ring gear 4 is attached.
  • the chain wheel 3 is not connected in a conventional manner to the pedal crankshaft 1 in a rotationally fixed manner, but is rotatably mounted on a bearing boss 5 of the one pedal crank 2.
  • This sprocket bearing is carried out via two needle bearings 6 and 7 with tapered races 8 and 9. As can be seen in Fig. 3, these needle bearings 6 and 7 are installed so that the taper angle of the races 8 and 9 open in opposite directions.
  • a pressure spring 12 is used to transmit power between the crank 2 and the sprocket 3 mounted on this crank 2, which is on the one hand on a Supporting approach 13 of the pedal crank 2 and on the other hand is supported on an abutment 14 which is formed by a bracket 15.
  • This bracket 15 is screwed together with the ring gear 4 on the sprocket 3 according to FIG. 1.
  • the pedal crank 2 has a projection 16 protruding against the chain wheel 3, which engages in a recess 17 of the chain wheel 3.
  • the shoulder 16 of the pedal crank 2 is held in the recess 17 with play in the circumferential direction, so that the radial boundaries of the recess 17 result in rotary stops 18 and 19 for the pedal crank 2 in both circumferential directions.
  • the pedal crank 2 is thus pressed against the direction of rotation 20 for forward travel against the rotary stop 18 by the compression spring 12.
  • the preload of the compression spring 12 can thus also be set via an actuator 21.
  • the projection 16 passing through the recess 17 results in a force attack on the chain wheel 3 with respect to the bearing of the chain wheel 3 in the region of the bearing center plane, so that favorable load conditions are set for the chain wheel bearing in the stop position of the projection 16.
  • the angle of rotation of the pedal crank 2 between the rotary stops conditions 18 and 19 should not be greater than 10 ° so that the desired uniform rotation of the pedal crank drive can be ensured without using a damping spring which retards the relaxation of the compression spring 12. Since a considerable tilting moment can be exerted on the chain wheel 3 when the compression spring 12 is tensioned due to the one-sided force application by the compression spring 12, appropriate support of the chain wheel 3 must be provided both in the axial and in the radial direction, which is due to the chosen bearing arrangement Help of the needle bearings 6 and 7 with conical races 8 and 9 is achieved without special design effort.
  • the pedal crank drive according to FIG. 4 does not need such needle bearings because the compression spring 12 according to FIG. 1 is replaced by two rotationally symmetrically arranged compression springs 12a, 12b.
  • the pedal crank 2 is extended via the pedal crank shaft 1 to a two-armed lever 22, so that the compression springs 12a, 12b can be supported on the two arms of this two-armed lever 22.
  • the abutments 14 for the compression springs 12a, 12b in the area of the sprocket 3 are formed by lugs 23 which are integrally formed on the hub 10 of the sprocket 3.
  • the hub 10 interchangeably carries one or more sprockets 4 in a conventional manner.
  • the use of two compression springs 12a, 12b prevents tilting moments which otherwise occur due to the one-sided spring arrangement, which enables the use of conventional roller bearings for mounting the chain wheel 3.
  • the two compression springs 12a, 12b hardly bring a greater weight load with them, because the two compression springs can be dimensioned weaker and the molded projections 23 of the hub 10 of the chain wheel 3 represent a lower weight load compared to the bracket 15 according to FIG. 1.
  • the function of the pedal crank drive is not affected by this division into the two compression springs 12a, 12b compared to the embodiment according to FIGS. 1 to 3.

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)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un entraînement par pédalier pour bicyclette comportant les éléments suivants : deux manivelles (2) solidaires en rotation par l'intermédiaire d'un axe (1), un pignon à chaîne (3) limité par une butée et monté rotatif sur un bord de palier (5) de l'une des deux manivelles (2), au moins un ressort de pression (12) placé dans le sens circonférentiel entre ladite manivelle (2) et le pignon à chaîne (3) pourvu d'un contre-palier (14) pour le ressort de pression (12). Pour créer des conditions de réalisation favorables, la manivelle (2) servant de support au pignon à chaîne (3) est en prise dans un évidement (17) du pignon à chaîne (3), avec une pièce (16) en saillie contre le pignon à chaîne (3), cet évidement formant dans les deux sens circonférentiels des butées de rotation (18, 19) pour cette manivelle (2).
EP02753890A 2001-06-26 2002-06-26 Entrainement par pedalier pour bicyclette Withdrawn EP1399359A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0098001A AT410533B (de) 2001-06-26 2001-06-26 Tretkurbelantrieb für ein fahrrad
AT9802001 2001-06-26
PCT/AT2002/000186 WO2003000542A1 (fr) 2001-06-26 2002-06-26 Entrainement par pedalier pour bicyclette

Publications (1)

Publication Number Publication Date
EP1399359A1 true EP1399359A1 (fr) 2004-03-24

Family

ID=3683795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02753890A Withdrawn EP1399359A1 (fr) 2001-06-26 2002-06-26 Entrainement par pedalier pour bicyclette

Country Status (5)

Country Link
US (1) US20040237708A1 (fr)
EP (1) EP1399359A1 (fr)
AT (1) AT410533B (fr)
TW (1) TW536505B (fr)
WO (1) WO2003000542A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101941499B (zh) * 2010-09-14 2012-07-25 王启贵 电动自行车智能助力装置
PT108079A (pt) * 2014-12-04 2016-06-06 Safetrust - Engenharia E Gestão Lda Dispositivo de modulação de binário de eixo pedaleiro de bicicleta e processo de afinação de binário gerado pelo dispositivo
CN106697163A (zh) * 2017-01-10 2017-05-24 李钢 一种上下往复踩踏式自行车
US11142281B2 (en) * 2018-04-17 2021-10-12 Huron Cycling, LLC Cycle crank assembly
JP6660642B1 (ja) * 2018-10-01 2020-03-11 籠田　憲雄 自転車用動力伝達装置
DE102021201317A1 (de) * 2021-02-12 2022-08-18 Robert Bosch Gesellschaft mit beschränkter Haftung Kurbelvorrichtung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447453A (en) * 1921-12-28 1923-03-06 Skayef Ball Bearing Company Roller bearing
GB232424A (en) * 1924-05-16 1925-04-23 Albert Edward Horlick Payne Improvements in or relating to pedal cranks for bicycles and the like
GB415272A (en) * 1933-06-14 1934-08-23 John Endersen Improvements in and relating to manually or pedal operated transmission systems for velocipedes
US2316530A (en) * 1941-05-03 1943-04-13 Torval W Nilsen Crank unit
US3828621A (en) * 1973-05-14 1974-08-13 K Uchino Bicycle drives
FR2409183A1 (fr) * 1977-11-22 1979-06-15 Chepelow Vsevolod Dispositif ameliorant le rendement d'un pedalier de bicyclette
FR2516886A2 (fr) * 1981-11-23 1983-05-27 Cubizolles Alexis Pedalier a manivelles debrayables et force adjuvante de ressorts
US4583422A (en) * 1982-09-20 1986-04-22 Winnett Boyd Pedal crank and chain wheel assembly for bicycles
EP0392063A1 (fr) * 1989-04-14 1990-10-17 Blättler, Arthur Manivelle à suppression de point mort
FR2645825B1 (fr) * 1989-04-18 1996-06-21 Floret Gaston Dispositif automatique d'amelioration de la puissance de traction du pedalier d'une bicyclette
US5060536A (en) * 1990-03-05 1991-10-29 Boys Donald R Flexible crank drive
EP0546004B1 (fr) 1990-09-04 1994-11-09 HILBER, Gerhard Commande des manivelles du pedalier d'une bicyclette
US5035678A (en) * 1990-10-26 1991-07-30 Trilach Development Inc. Energy-storing bicycle sprocket drive system
US5157988A (en) * 1991-06-11 1992-10-27 Pinkstock Donald H Elastic crank for bicycles
US6508146B2 (en) * 2000-06-05 2003-01-21 Byung-Nam Kang Pedal driving mechanism of bicycle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03000542A1 *

Also Published As

Publication number Publication date
TW536505B (en) 2003-06-11
ATA9802001A (de) 2002-10-15
AT410533B (de) 2003-05-26
WO2003000542A1 (fr) 2003-01-03
US20040237708A1 (en) 2004-12-02

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