EP0995057A1 - Transmission system - Google Patents
Transmission systemInfo
- Publication number
- EP0995057A1 EP0995057A1 EP99901066A EP99901066A EP0995057A1 EP 0995057 A1 EP0995057 A1 EP 0995057A1 EP 99901066 A EP99901066 A EP 99901066A EP 99901066 A EP99901066 A EP 99901066A EP 0995057 A1 EP0995057 A1 EP 0995057A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output shaft
- intermediate member
- input shaft
- clutch
- casing
- 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- Withdrawn
Links
Classifications
-
- 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
- F16H29/00—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action
- F16H29/02—Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action between one of the shafts and an oscillating or reciprocating intermediate member, not rotating with either of the shafts
Definitions
- the output shaft can drive the load not rigidly but through a proper elastic connection while an additional overrunning clutch, secured to the casing, can prevent the reverse motion of the output shaft.
- FIG 1 and 2 it is shown a crankshaft 5 having a crank pin 6 of controllable throw.
- the connecting rod 44 Through the connecting rod 44 the rotary motion of the crankshaft 5 is transmitted to the intennediate oscillating member 15 which drives, by means of an overmnning clutch 48, the output shaft 16.
- a flywheel 45 representing the inertia of the load, rigidly secured to the output shaft 16.
- FIG 4 they are shown, simplified, all the constituent parts of the transmission system as it is in the state of the art.
- the flywheel corresponds to the inertia of the vehicle while the brake corresponds to the various resistance in the motion of the vehicle.
- There is an input shaft there is a controllable connecting mechanism that transforms the rotation of the input shaft to rotational oscillation of variable amplitude of an intermediate member, there is also an overrunning clutch between the oscillating member and the output shaft.
- the transmission ratio changes by controlling the throw of the crank pin 6 of the input shaft 5.
- FIG 5 it is shown the flywheel 45 elastically connected to the output shaft 16. It is also shown an additional overrunning clutch between the casing and the output shaft.
- FIG 6 it is shown, simplified, the whole assembly of the transmission -2- system shown in FIG 4, modified according the present invention.
- the driven system is elastically connected to the output shaft 16 and an additional oveirunning clutch 49 is inserted between the casing 23 and the output shaft 16 to prevent the reverse motion of the output shaft.
- FIG 7 to 12 they are schematically shown the angular velocities and the time intervals of engagement for the mechanisms of FIG 1 to 6.
- the crankshaft 5 rotates with a velocity ⁇ o, shown as a function of time in FIG 7 to 12.
- the crank pin 6 has a controllable throw which is smaller in the case of FIG 2.
- the connecting rod 44 connects the pin 14 of the intermediate member 15 to the crank pin 6.
- the rotary motion of the crankshaft 5 is transformed into oscillation of controllable amplitude ⁇ of the intermediate member 15.
- the instant velocity of the 15 is ⁇ i in FIG 1 and ⁇ in FIG 2, shown as function of time in FIG 7 and 8.
- Rolers like 26 and springs like 28 fonn an overrunning clutch 48 between the inte ⁇ nediate member 15 and the output shaft 16.
- the output shaft 16, shown also in FIG 1 and 2 is secured, by means of inflexible member like 47, to the driven system 45, which is shown as a flywheel, so that the instant angular velocity of both, output shaft 16 and driven system 45, is the same ⁇ 2 .
- the break 50, shown in FIG 4, corresponds to the resistance of the driven system.
- the transmission ratio is substantially the ratio of the maximum angular velocity of the intermediate member 15 to the mean angular velocity of the input shaft. This ratio changes according the throw of the crank pin 6, as it is shown in FIG 2 where the crank pin 6 shifts closer to the rotation axis of the crankshaft 5 and so ⁇ ' ⁇ . To change the transmission ratio it is enough to shift the crank pin 6.
- the driven system 45 is connected elastically to the output shaft 16 by means of some flat spiral springs like 46, while an additional over ⁇ inning clutch 49, made of rollers like 25 and springs like 29, is inserted between the shaft 16 and the immovable casing 23.
- the instant angular velocity of the shaft 16 is ⁇ ⁇
- the driven system 45 is ⁇ 3 , -3- different than ⁇ 2 ⁇ .
- FIG 11 it is drawn with continuous line the angular velocity ⁇ 2 ⁇ of the output shaft 16 of FIG 5 and 6, it is also drawn with dashed dot line the resulting angular velocity ⁇ 3 of the driven system 45.
- the additional oveirunning clutch prevents the reverse motion of the output shaft 16.
- T ⁇ is the time interval, during each rotation of the crank 5, wherein the intermediate member 15 is engaged to the output shaft 16 and energy flows between them.
- This T ⁇ is about half of the period T, so there is plenty of time to transfer energy f om the crankshaft 5 to the output shaft 16. Even more, energy is transferred to the load all the time. This happens because the elastic connection 46 stores energy while the T ⁇ time interval during each cycle of rotation of the input shaft 5, and offers energy to the load in a substantially continuous way. The loads are impact no more.
- the transmission ratio is substantially the ratio of the amplitude ⁇ of the oscillation of the intermediate member 15 to the necessary 360 degrees for a rotation of the input shaft 5.
- FIG 8, 10 and 12 show respective diagrams of FIG 7, 9 and 11 but for a smaller throw of the pin 6, as shown in FIG 2.
- a second output shaft is driven by the intermediate oscillating member through an additional oveirunning clutch and a fraction of the load is elastically driven by said second output shaft while another oveirurining clutch, inserted between the casing and the second output shaft, prevents the reverse rotation of the second output shaft, then the system performs also the operation of a controllable differential supplying the most of the torque to the slower part of the load.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR98100044 | 1998-01-30 | ||
GR98100044 | 1998-01-30 | ||
PCT/GR1999/000009 WO1999039116A1 (en) | 1998-01-30 | 1999-01-28 | Transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0995057A1 true EP0995057A1 (en) | 2000-04-26 |
Family
ID=10943314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99901066A Withdrawn EP0995057A1 (en) | 1998-01-30 | 1999-01-28 | Transmission system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0995057A1 (en) |
JP (1) | JP2001520732A (en) |
CN (1) | CN1141502C (en) |
GR (1) | GR980100044A (en) |
WO (1) | WO1999039116A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2365083B (en) * | 2000-07-25 | 2004-09-15 | Jeremy Bernard Cooper | Continuously variable transmission using spring and oscillating shaft |
DE10064899A1 (en) * | 2000-12-23 | 2002-07-25 | Bosch Gmbh Robert | Device for driving an output member |
GB2400422B (en) * | 2000-12-23 | 2004-12-08 | Jeremy Bernard Cooper | Continuously variable transmission using spring and oscillating shaft |
WO2006026892A1 (en) * | 2004-09-10 | 2006-03-16 | Zhihe Lin | A rope type pulse stepless transmission |
JP5491052B2 (en) * | 2009-03-30 | 2014-05-14 | 章市 和田 | Power transmission mechanism |
CN102913603B (en) * | 2012-09-24 | 2016-12-21 | 沈玉成 | A kind of New-type cycloidal linkage bar type stepless speed governing reductor |
CN103851147A (en) * | 2014-03-18 | 2014-06-11 | 奇瑞重工股份有限公司 | CVT (continuously variable transmission) speed changer based on variable-stroke reciprocating motion |
CN104590009B (en) * | 2015-02-15 | 2017-03-22 | 陈刚华 | Mechanical vehicle power system and control method thereof |
CN104633094B (en) * | 2015-02-15 | 2017-03-22 | 福州大学 | Impulse type continuously variable transmission |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB211110A (en) * | 1923-02-10 | 1925-06-15 | Heinrich Schieferstein | Improvements in unidirectional power transmission mechanism |
GB898744A (en) * | 1957-06-14 | 1962-06-14 | Fairbairn Lawson Combe Barbour | Variable ratio speed change units |
CH383124A (en) * | 1959-05-30 | 1964-10-15 | Maag Zahnraeder & Maschinen Ag | Feed switch |
GB1188904A (en) * | 1968-02-21 | 1970-04-22 | Frederick Charles Bartholomew | Automatic Mechanical Variable Gear. |
FI53616C (en) | 1976-11-29 | 1978-06-12 | Laakko M A | MECHANICAL VARIATOR |
US4109539A (en) | 1977-05-20 | 1978-08-29 | Feleus Christiaan Cornelis | Dynamic power booster |
DE3226245A1 (en) | 1982-07-14 | 1984-01-26 | Wilhelm J.K. 8034 Germering Kling | Infinitely adjustable positive orbiform-cam stop-motion linkage for producing sequences of motion with one or more dwells of the output shaft and partially reversed movements |
JPS60125454A (en) | 1983-12-06 | 1985-07-04 | Daikin Mfg Co Ltd | Linkage of variable swing angle |
JP3010070B2 (en) * | 1991-06-03 | 2000-02-14 | テイエチケー株式会社 | Continuously variable transmission |
GB2325282B (en) * | 1997-05-15 | 2001-09-12 | David Livingstone | A continuously variable mechanical transmission |
-
1998
- 1998-01-30 GR GR980100044A patent/GR980100044A/en unknown
-
1999
- 1999-01-28 JP JP53907899A patent/JP2001520732A/en active Pending
- 1999-01-28 EP EP99901066A patent/EP0995057A1/en not_active Withdrawn
- 1999-01-28 CN CNB998000892A patent/CN1141502C/en not_active Expired - Fee Related
- 1999-01-28 WO PCT/GR1999/000009 patent/WO1999039116A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9939116A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1141502C (en) | 2004-03-10 |
CN1255962A (en) | 2000-06-07 |
JP2001520732A (en) | 2001-10-30 |
GR980100044A (en) | 1999-09-30 |
WO1999039116A1 (en) | 1999-08-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19991022 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB IE IT LI NL PT SE |
|
17Q | First examination report despatched |
Effective date: 20000413 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH DE DK ES FI FR GB IE IT LI NL PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20010828 |