EP0182804A1 - Transmission apparatus - Google Patents
Transmission apparatusInfo
- Publication number
- EP0182804A1 EP0182804A1 EP19850902101 EP85902101A EP0182804A1 EP 0182804 A1 EP0182804 A1 EP 0182804A1 EP 19850902101 EP19850902101 EP 19850902101 EP 85902101 A EP85902101 A EP 85902101A EP 0182804 A1 EP0182804 A1 EP 0182804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- driven
- driving means
- transmission
- driving
- 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- Withdrawn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
- F16H33/00—Gearings based on repeated accumulation and delivery of energy
- F16H33/02—Rotary transmissions with mechanical accumulators, e.g. weights, springs, intermittently-connected flywheels
- F16H33/04—Gearings for conveying rotary motion with variable velocity ratio, in which self-regulation is sought
- F16H33/08—Gearings for conveying rotary motion with variable velocity ratio, in which self-regulation is sought based essentially on inertia
- F16H33/14—Gearings for conveying rotary motion with variable velocity ratio, in which self-regulation is sought based essentially on inertia having orbital members influenced by regulating masses
Definitions
- the present invention relates to transmission apparatus which will match the power input from a prime mover to provide a power output of equal value less the efficiency of the me ⁇ hanism. It is an object of the present invention to provide an improved form of transmission apparatus.
- transmission apparatus comprising at least one system having driving means adapted to be driven about an axis of rotation by a prime mover, driver means rotatably driven by said driving means, and transmission means drivingly inter ⁇ connecting said driving and driven means characterised in that means are provided for generating a kinetic force on operation of the transmission means to cause a torque to be applied to control movement of the transmission means whereby the driven means can be rotated at a speed which is not directly related to that of the driving means.
- a transmission apparatus having driving means adapted to be driven about an axis of rotation by a prime mover, driven means rotatably driven by said driving means, and transmission means drivingly interconnecting said driving and driven means ' characterised in that said method comprises generating kinetic force on operation of the transmission means, and applying said force to provide torque to control movement of the transmission means whereby the driven means can be rotated at a speed which is not directly related to that of the driving means.
- the centrifugal force generated by a rotatable weight acts to prevent reciprocation of a reciprocating mechanism which in turn applies a torque to the transmission means to tend to rotate the driven means.
- the transmission means comprises a planetary gear connected to the driving means and rotatable about an axis of rotation parallel to and offset from that of a driving wheel constituting the driving means, which planetary gear engages with a driven gear of the driven means.
- the " planetary gear carries a crankpin offset from its centre of rotation which drives the reciprocating mechanism and causes the weight to rotate.
- Fig. 1 shows a cross-sectional view of a first embodiment of transmission apparatus illustrating the principle of the present invention
- Fig. 2 shows a schematic front view of the trans ⁇ mission apparatus of Fig. 1, and
- Fig. 3 shows a cross-sectional view of a second practical embodiment of transmission apparatus in accordance with the present invention.
- a transmission apparatus comprises a driving wheel or frame 10 which is rotatably mounted on a shaft 11 and is rotatably driven about the shaft 11 by a prime mover (not shown) .
- the shaft 11 is in turn mounted in bearings 11a and has keyed to it a driven gear 12 which engages with a planetary gear 13 rotatably mounted on the driving wheel 10.
- the shaft 11 is adapted to be connected to a load and as such it will be appreciated that the shaft 11 and the driven gear 12 keyed to it are not freely rotatable in the bearings 11a but rather will rotate only when the force exerted on the driven gear 12 exceeds the resistance of the load on the shaft 11. This will be elaborated on further hereinhelow.
- the planetary gear 13 carries a crankpin 14 radially offset from its centre of rotation and to the end of this crankpin 14 is keyed a gear wheel 15. Also mounted on the crankpin 14, but freely rotatable thereon is a frame 16 which has rotatably mounted on it two gear wheels 17 and : 18.
- the gear wheel 18 is the same size as the gear wheel 15 and is, in fact, driven by the gear wheel 15 through a gear wheel 17 which is positioned between and engages with them both.
- the end of the frame 16 remote from the crankpin 14 is provided with an elongate locating slot 19 which is located over the end of the shaft 11 and ensures that movement of the frame 16 is limited to reciprocating back and forth with the motion of the crankpin 14.
- a radially extending arm 20 carrying at its outer end a weight 21 (see Fig. 2) is secured to the gear wheel 18.
- the disposition of the radial arm 20 and the weight 21 on the gear wheel 18 ensures that they rotate in unison with crankpin 14, but that they lag the crankpin by approximately 90°.
- the load on the shaft 11 will usually be such that on start up of the prime mover (not shown) , the driven gear 12 is held stationary. As a result, it is the planetary gear 13 which is rotated as it moves around the driven gear 12 on the rotating driving wheel 10. As the planetary gear 13 rotates about its central axis, so too does the crankpin 14 and as the crankpin 14 rotates so too does the gear wheel 18 (through the action of gear wheels 15 and 17) and the weight 21 secured thereto by the radial arm 20. At the same time, the frame 16 is caused to reciprocate back and forth due to the motion of the crankpin about the central axis of the planetary gear 13.
- the rotation of the weight 21 generates a centri ⁇ fugal force which is proportional to the angular accelera ⁇ tion of the weight 21 and which, because of its disposi- tion relative to the crankpin 14, tends to apply a torque to cause the frame 16 resist the movement of the crankpin 14. The effect of this is to cause the force required to rotate the planetary gear 13 to be transmitted to the driven gear 12.
- the embodiment illustrated in Fig. 3 of the drawings illustrates a more practical form of the invention as compared with that shown in Figs. 1 and 2.
- the embodiment of Fig. 3 comprises a prime mover 30, e.g. a vehicle engine, having an output shaft 31.
- the outer end of the output shaft 31 has an integral flange 32 which is fixedly secured by bolts 33 to a driving frame or housing 34 whereby the driving frame 34 can be rotatably driven about a shaft 35 by the prime mover 30 on bearings 36.
- a -output gear 37 is integral with shaft 35.
- Planetary gear systems each designated by the references A and B are disposed at a spacing of 180° relative to each other on either side of the shaft 35 so that in operation the systems A and B result in a balanced structure.
- the gear systems A and B are otherwise substantially identical.
- Each system A and B comprises a planetary gear 38 which meshes with a driven gear 39 integral with shaft 35.
- the shaft 35 and integral driven gear 39 are not freely rotatable but will rotate only when the force exerted on the driven gear 39 exceeds the resistance of the load on the shaft 35.
- the planetary gear 38 is carried rotatably on a hub 40 extending axially from an internal extension
- crankpin 42 projecting therefrom and radially offset from its centre of rotation.
- the outer end of the crankpin 42 carries an integral gear wheel 43.
- a connecting rod 44 which has rotatably mounted thereon a pair of gear wheels 45 and 46.
- the gear wheel 46 is the same diameter as the gear wheel 43 and is driven by the gear wheel 43 through the intermediary of gear wheel 45 which is in mesh with both gear wheels 43 and 46.
- the end of each connecting rod 44 remote from crankpin 42 is provided with an elongated slot 47 which closely surrounds one end of the shaft 35 to ensure reciprocation of the connecting rod 44 in accordance with the motion of the crankpin 42.
- Each gear wheel 46 has an axially-extending sleeve 48 freely surrounding a lateral extension 49 of its associated connecting rod 44 and each sleeve has an integral radially-extending counterweight 50.
- each counterweight 50 rotates in unison with its associated crankpin 42 but is angularly spaced therefrom by around 90 .
- each counterweight 50 is angularly spaced from its associated crankpin 42 by approximately 90 in the same manner as illustrated in the embodiment shown in Fig. 2.
- Fig. 3 The assembly of Fig. 3 is shown associated with a gear box 51 of substantially traditional design.
- the output gear 37 of the transmission assembly meshes with gear wheel 52 carried by shaft 53.
- gear box 51 is housed within an extension 57 of the driving frame 34.
- the torque is available to provide static force on the driven member and through the speed range until the driving member and driven member are rotating synchronously.
- the present invention is applicable to many situations where a drive has to be taken up from a prime mover e.g. vehicles or cranes and may be substituted for a conventional flywheel and clutch with the advantage that the wear which takes place in such clutches can be obviated.
- the apparatus can therefore be utilised as a clutch as well as a ' continuously variable transmission, or a torque converter.
- An additional advantage of the present invention is that for a given power output, a smaller power unit is required as compared with existing power units presently in use.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Structure Of Transmissions (AREA)
- Retarders (AREA)
Abstract
Dispositif de transmission comprenant un organe d'entraînement (10) destiné à être entraîné en rotation autour d'un axe par un moteur premier, un organe entraîné (11, 12) en rotation par l'organe d'entraînement (10), et un organe de transmission (13, 15, 17 et 18) reliant les organes entraînés et d'entraînement, l'organe de transmission étant pourvu d'un organe générateur de couple, constitué par un poids rotatif (21) produisant une force centrifuge, qui est appliquée à un maneton (14) pour limiter le mouvement de l'engrenage planétaire (10, 12, 13). L'organe entraîné peut tourner à une vitesse sans relation directe avec celle de l'organe d'entraînement.Transmission device comprising a drive member (10) intended to be driven in rotation about an axis by a first motor, a member driven (11, 12) in rotation by the drive member (10), and a transmission member (13, 15, 17 and 18) connecting the driven and drive members, the transmission member being provided with a torque generating member, constituted by a rotary weight (21) producing a centrifugal force, which is applied to a crankpin (14) to limit the movement of the planetary gear (10, 12, 13). The driven member can rotate at a speed unrelated to that of the drive member.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB848413326A GB8413326D0 (en) | 1984-05-24 | 1984-05-24 | Torque converter |
GB8413326 | 1984-05-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0182804A1 true EP0182804A1 (en) | 1986-06-04 |
Family
ID=10561465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850902101 Withdrawn EP0182804A1 (en) | 1984-05-24 | 1985-05-20 | Transmission apparatus |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0182804A1 (en) |
JP (1) | JPS61502203A (en) |
AU (1) | AU4353885A (en) |
GB (1) | GB8413326D0 (en) |
WO (1) | WO1985005428A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPQ089799A0 (en) * | 1999-06-10 | 1999-07-01 | Aimbridge Pty Ltd | Transmission |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2736214A (en) * | 1956-02-28 | stortz | ||
FR566493A (en) * | 1923-05-19 | 1924-02-15 | Automatic gear change device | |
US1741854A (en) * | 1928-07-09 | 1929-12-31 | Automatic Transmission Company | Automatic transmission |
US2149560A (en) * | 1937-03-02 | 1939-03-07 | Queensland Trustees Ltd | Variable speed power transmission mechanism |
US2564211A (en) * | 1949-10-12 | 1951-08-14 | Thomas M O'hara | Variable-speed coupling |
FR1049416A (en) * | 1951-07-13 | 1953-12-29 | Automatic torque transformer |
-
1984
- 1984-05-24 GB GB848413326A patent/GB8413326D0/en active Pending
-
1985
- 1985-05-20 WO PCT/GB1985/000213 patent/WO1985005428A1/en not_active Application Discontinuation
- 1985-05-20 AU AU43538/85A patent/AU4353885A/en not_active Abandoned
- 1985-05-20 JP JP50213385A patent/JPS61502203A/en active Pending
- 1985-05-20 EP EP19850902101 patent/EP0182804A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO8505428A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPS61502203A (en) | 1986-10-02 |
GB8413326D0 (en) | 1984-06-27 |
AU4353885A (en) | 1985-12-13 |
WO1985005428A1 (en) | 1985-12-05 |
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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 |
|
17P | Request for examination filed |
Effective date: 19860110 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 19870415 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19870602 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19890522 Year of fee payment: 5 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BLACKBURN, DONALD, MACPHERSON |