GB1139184A - Torque-sensitive infinitely variable change speed gear - Google Patents
Torque-sensitive infinitely variable change speed gearInfo
- Publication number
- GB1139184A GB1139184A GB1902466A GB1902466A GB1139184A GB 1139184 A GB1139184 A GB 1139184A GB 1902466 A GB1902466 A GB 1902466A GB 1902466 A GB1902466 A GB 1902466A GB 1139184 A GB1139184 A GB 1139184A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transmission
- torque
- speed
- driving
- downshift
- 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
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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H61/66227—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members controlling shifting exclusively as a function of speed and torque
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Transmission Devices (AREA)
Abstract
1,139,184. Variable-speed gear. PIAGGIO & C. S.p.A. 29 April, 1966 [15 May, 1965], No. 19024/66. Heading F2D. The speed ratio of an I.C. engine transmission comprising driving and driven expandable sheaves connected by a V-belt, is steplessly varied by (a) speed sensitive means, comprising centrifugal masses, which upshifts the transmission as the speed of the driving sheave increases, and (b) torque sensitive means effective to counteract (a) to downshift the transmission when the transferred torque is increased above a predetermined value. In Fig. 1, driving half-sheave 6 is axially movable to increase, or decrease, the diameter wrapped by V-belt 11, (a) by means of centrifugal masses 9 as the speed of the driving shaft 1 increases, and (b) by means of sleeve 2, which has a helical path 4 in which a pin 3 on the driving shaft runs, and which sleeve, above a value of torque which corresponds to the pre-loading at assembly of spring 8, abuts stops 10 on guides 5 to downshift the transmission. Preloading of the spring 8 may be obtained through a lost motion stroke of the sleeve 2. In Figure 2, (not shown), centrifugal masses 25 move helical ramps 20 on which rollers 20<SP>1</SP>, of a pitman 21 connected to the movable halfsheave 17<SP>1</SP>, run to upshift the transmission. A box 16, connected to axially-fixed halfsheave 17 and carrying toothed sections 14 which mesh with a pinion 13 on the driving shaft 12, is rotated by a transferred torque giving rise to an angular displacement of sectors 14, counteracted by pre-loaded springs 18, which sectors act on the masses 25 to return them to the centre to downshift the transmission.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1096565 | 1965-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1139184A true GB1139184A (en) | 1969-01-08 |
Family
ID=11134691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1902466A Expired GB1139184A (en) | 1965-05-15 | 1966-04-29 | Torque-sensitive infinitely variable change speed gear |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1550899B1 (en) |
ES (1) | ES326750A1 (en) |
FR (1) | FR1493490A (en) |
GB (1) | GB1139184A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2143601A (en) * | 1983-07-18 | 1985-02-13 | Piaggio & C Spa | Variable-transmission-ratio mechanical drive with v-belt and expansible sheaves |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4216678A (en) * | 1978-04-17 | 1980-08-12 | Borg-Warner Corporation | Drive system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1001901B (en) * | 1955-03-22 | 1957-01-31 | Suedd Ilo Werk G M B H | Speed-dependent regulating, continuously variable V-belt transmission, especially for motor vehicles |
DE1056486B (en) * | 1956-02-18 | 1959-04-30 | Vladimir Hruska | Infinitely variable traction gear for vehicles |
DE1086507B (en) * | 1957-08-15 | 1960-08-04 | Leipzig Inst Foerdertech | Automatic regulation of the transmission ratio between the drive motor and the means of transport, e.g. B. wheels, caterpillars driving fluid gears |
FR1205727A (en) * | 1958-08-09 | 1960-02-04 | Motobecane Ateliers | Improvements to automatic variable speed drives with extendable pulley and V-belt, especially for mopeds and small vehicles |
FR1222197A (en) * | 1959-04-22 | 1960-06-08 | Cie Int Machines Agricoles | Automatic hydrostatic torque converter |
-
1966
- 1966-04-29 GB GB1902466A patent/GB1139184A/en not_active Expired
- 1966-05-11 DE DE19661550899 patent/DE1550899B1/en not_active Withdrawn
- 1966-05-12 FR FR69047273A patent/FR1493490A/en not_active Expired
- 1966-05-14 ES ES0326750A patent/ES326750A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2143601A (en) * | 1983-07-18 | 1985-02-13 | Piaggio & C Spa | Variable-transmission-ratio mechanical drive with v-belt and expansible sheaves |
Also Published As
Publication number | Publication date |
---|---|
DE1550899B1 (en) | 1971-06-16 |
FR1493490A (en) | 1967-09-01 |
ES326750A1 (en) | 1967-03-16 |
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