IT1269775B - Trasmissione a cinghia con variazione di rapporto di trasmissione continua automatica, in particolare per biciclette - Google Patents
Trasmissione a cinghia con variazione di rapporto di trasmissione continua automatica, in particolare per bicicletteInfo
- Publication number
- IT1269775B IT1269775B ITMI940973A ITMI940973A IT1269775B IT 1269775 B IT1269775 B IT 1269775B IT MI940973 A ITMI940973 A IT MI940973A IT MI940973 A ITMI940973 A IT MI940973A IT 1269775 B IT1269775 B IT 1269775B
- Authority
- IT
- Italy
- Prior art keywords
- segments
- pulley
- belt
- driving pulley
- belt transmission
- Prior art date
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
- B62M9/08—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/10—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley provided with radially-actuatable elements carrying the belt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Pulleys (AREA)
- Control Of Transmission Device (AREA)
Abstract
Una trasmissione a cinghia in particolare per biciclette con puleggia motrice 1 e puleggia condotta 2, ciascuna variabile in maniera continua nel suo diametro efficace, su ciascuna puleggia ha più segmenti 5 rispettivamente 6, preferenzialmente cinque, sfalsati uniformemente in direzione circonferenziale e supportati su una mensola 3 rispettivamente 4, girevole nel telaio (intorno a A), orientabili con la stessa distanza radiale fra arresti. I singoli segmenti 5 della puleggia motrice 1 sono eseguiti come leve monobraccio; fra segmenti 51, 52 vicini fra di loro preferenzialmente soltanto sulla puleggia motrice 1 è disposta ogni volta una molla 8, che ad un'estremità si appoggia sull'estremità di leva del primo segmento 51 e con la sua altra estremità agisce sul successivo segmento 52 fra le sue estremità di leva. I singoli segmenti 6 della puleggia condotta 2 sono eseguiti come leve a due bracci. Le superfici efficaci per l'impegno con la cinghia dentata nono evolventi su tutti i segmenti 5 rispettivamente 6. Una variazione di rapporto di trasmissione, avviata sulla puleggia motrice 1 con un momento di azionamento incrementato (riduzione del suo diametro efficace contro forza di molla) provoca automaticamente l'allargamento dei segmenti 6 sulla puleggia condotta 2 con contemporanea tensione della cinghia.In una bicicletta, la trasmissione a cinghia comandata da forza di pedale e trasmettente in maniera continua, si può combinare senza problemi con un freno a contropedale e/o con un cambio sul mozzo a più marce, il rapporto di trasmissione interno continuo della trasmissione a cinghia venendo eseguito in maniera idonea sul salto di marcia del cambio per mozzo.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4318648A DE4318648C1 (de) | 1993-06-04 | 1993-06-04 | Riementrieb mit selbttätiger stufenloser Übersetzungsänderung, insbesondere für Fahrräder |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI940973A0 ITMI940973A0 (it) | 1994-05-13 |
ITMI940973A1 ITMI940973A1 (it) | 1995-11-13 |
IT1269775B true IT1269775B (it) | 1997-04-15 |
Family
ID=6489676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI940973A IT1269775B (it) | 1993-06-04 | 1994-05-13 | Trasmissione a cinghia con variazione di rapporto di trasmissione continua automatica, in particolare per biciclette |
Country Status (5)
Country | Link |
---|---|
US (1) | US5407395A (it) |
JP (1) | JPH0733064A (it) |
CN (1) | CN1100051A (it) |
DE (1) | DE4318648C1 (it) |
IT (1) | IT1269775B (it) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322382A1 (de) * | 1993-06-29 | 1995-01-12 | Jaroslaw Piotr Warszewski | Stufenlos selbsttätig verstellbarer Fahrradantrieb |
GB9400416D0 (en) * | 1994-01-11 | 1994-03-09 | Spirig Ernest | Variable ratio drive mechanism |
US5520583A (en) * | 1994-10-25 | 1996-05-28 | Balingit; Ronald F. | Governor drive pulley |
DE4441430C1 (de) | 1994-11-22 | 1996-07-11 | Buchheister Ingo | Stufenlos verstellbares Riemengetriebe für Fahrräder oder dgl. |
AU7811798A (en) | 1997-06-21 | 1999-01-04 | Dennis C. Hinrichs | Fluidic drive apparatus |
DE19811491C2 (de) * | 1998-03-17 | 1999-09-23 | Zhaoqi Wang | Zugfahrwerk für Fahrrad |
US6432009B1 (en) * | 1998-08-06 | 2002-08-13 | Brigham Young University | Continuously variable transmission |
US6332852B1 (en) | 2000-05-30 | 2001-12-25 | 3561020 Canada Inc. | Variable ratio drive system |
US6431573B1 (en) | 2000-12-29 | 2002-08-13 | Massachusetts Institute Of Technology | Automatic transmission for a cycle, such as a bicycle, and a cycle having such as transmission |
KR20040037778A (ko) * | 2002-10-30 | 2004-05-07 | 현대자동차주식회사 | 알터네이터 |
US20080108464A1 (en) * | 2004-04-02 | 2008-05-08 | Witold Gajewski | Vibration Compensating Pulley |
DE102005032255A1 (de) * | 2005-07-11 | 2007-01-18 | Bernhard Pross | Stufenloses, drehmomentabhängiges, mechanisches Automatikgetriebe |
JP2007210525A (ja) * | 2006-02-10 | 2007-08-23 | Kooken Medical Kk | 階段避難用坐式降下器具 |
US8360908B2 (en) * | 2007-11-26 | 2013-01-29 | The Gates Corporation | Expandable pulley |
US20110230286A1 (en) * | 2010-03-17 | 2011-09-22 | Eli Cohen | Variable Drive Transmission |
CN102200179B (zh) * | 2010-03-23 | 2014-03-26 | 鸿富锦精密工业(深圳)有限公司 | 减速机构 |
US9222568B2 (en) | 2011-01-05 | 2015-12-29 | Trek Bicycle Corporation | Bicycle power train cogs |
ES2716658T3 (es) * | 2016-06-03 | 2019-06-13 | Zuma Innovation S L | Conjunto de platos para un sistema de transmisión de potencia |
CN106043587B (zh) * | 2016-08-04 | 2018-10-26 | 夏义捷 | 一种离心自动变速装置 |
CN113715955B (zh) * | 2021-09-13 | 2023-01-10 | 昆山德钜源运动科技有限公司 | 一种无级变速自行车牙盘 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1486590A (en) * | 1924-03-11 | landahl | ||
DE122517C (it) * | ||||
DE93896C (it) * | ||||
CH29857A (de) * | 1904-01-09 | 1904-10-15 | Robert Brauchlin | Riemenscheibe mit veränderbarem Durchmesser |
DE642664C (de) * | 1935-10-06 | 1937-03-11 | Karl Heidsieck Dipl Ing | Getriebeteil veraenderlichen Durchmessers |
US2469665A (en) * | 1948-01-17 | 1949-05-10 | Long Ltd E | Radial adjusting sprocket |
DE1188889B (de) * | 1961-12-23 | 1965-03-11 | Maschf Augsburg Nuernberg Ag | Getriebegehaeuse |
US3935751A (en) * | 1975-01-06 | 1976-02-03 | Lee Kuang Chang | Centrifugal stepless speed changing device |
EP0112112A1 (en) * | 1982-12-14 | 1984-06-27 | Michel Deal | Variable ratio transmission |
FR2632041B1 (fr) * | 1988-05-31 | 1990-08-10 | Electricite De France | Poulie a diametre variable simple ou double et variateurs de vitesse incluant une telle poulie double |
-
1993
- 1993-06-04 DE DE4318648A patent/DE4318648C1/de not_active Expired - Fee Related
-
1994
- 1994-05-13 IT ITMI940973A patent/IT1269775B/it active IP Right Grant
- 1994-05-19 JP JP6139267A patent/JPH0733064A/ja active Pending
- 1994-05-27 US US08/250,003 patent/US5407395A/en not_active Expired - Fee Related
- 1994-06-03 CN CN94106919A patent/CN1100051A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
DE4318648C1 (de) | 1994-07-14 |
US5407395A (en) | 1995-04-18 |
ITMI940973A1 (it) | 1995-11-13 |
ITMI940973A0 (it) | 1994-05-13 |
JPH0733064A (ja) | 1995-02-03 |
CN1100051A (zh) | 1995-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970627 |