FR2675874A1 - Mechanical transmission device with continuously and automatically variable speed ratio - Google Patents

Mechanical transmission device with continuously and automatically variable speed ratio Download PDF

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Publication number
FR2675874A1
FR2675874A1 FR9105281A FR9105281A FR2675874A1 FR 2675874 A1 FR2675874 A1 FR 2675874A1 FR 9105281 A FR9105281 A FR 9105281A FR 9105281 A FR9105281 A FR 9105281A FR 2675874 A1 FR2675874 A1 FR 2675874A1
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France
Prior art keywords
satellites
gravity
rotation
center
axis
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FR9105281A
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French (fr)
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FR2675874B1 (en
Inventor
Perret Jean
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Individual
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Individual
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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
    • F16H33/18—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 of which the motion is constrained
    • F16H33/185—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 of which the motion is constrained the masses being fixed to the orbital members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

The invention relates to a mechanical device allowing the transmission of a variable torque from a drive shaft to a receiving shaft with a continuously and automatically variable ratio of their speeds between a zero value and a maximum value. It is made up of an epicyclic gear train including a fixed-axis wheel (1) meshing with spider gears (2) carried by a spider (3), each spider gear rotationally driving an offcentred mass (4). The driving and resistive torques are applied to the axle (5) of the spider and to the axle (6) of the wheel. The gear train may also include two fixed-axle wheels; in this case the torques are applied to the axles of each wheel. The device according to the invention is particularly intended for the driving of machines, tools or vehicles with a variable operating speed. It may also be used as an active braking member in the same applications or for applying a tightening torque or static load.

Description

La présente invention concerne des dispositifs mécaniques permettant de transmettre un couple variable d'un arbre moteur à un arbre récepteur avec un rapport de leurs vitesses de rotation continuement et automatiquement variable. The present invention relates to mechanical devices making it possible to transmit a variable torque from a motor shaft to a receiving shaft with a ratio of their rotational speeds continuously and automatically variable.

Les dispositifs mécaniques connus de ce genre sont des systèmes à courroie, à chaîne ou à friction qui ont divers inconvénients concernant le rendement, la plage des couples transmissibles ou des vitesses de rotation, le fonctionnement-non intrinsèquement automatique. Known mechanical devices of this kind are belt, chain or friction systems which have various drawbacks concerning the yield, the range of transmissible torques or rotational speeds, the operation - not intrinsically automatic.

Les dispositifs hydrostatiques et hydrodynamiques ont l'inconvénient d'une construction plus complexe et plus onéreuse que celle des systèmes mécaniques. Hydrostatic and hydrodynamic devices have the disadvantage of a more complex and more expensive construction than that of mechanical systems.

e
Le dispositif selon l'invention prmet de remédier à ces inconvénients.e
The device according to the invention allows to remedy these drawbacks.

I1 est constitué en effet par tout train d'engrenages épicyclodal droit ou sphérique comportant soit deux roues à axe fixe engrenant avec des satellites, soit une seule roue à axe fixe engrenant avec des satellites, dans lequel la rotation de chaque satellite entraîne la rotation de masses dont le centre de gravité est situé hors de leur axe de rotation. Selon l'invention, les couples moteur et résistant sont appliqués dans un cas à l'une et l'autre des roues à axe fixe et dans l'autre cas au porte-satellites d'une part et à la roue à axe fixe d'autre part. It is in fact constituted by any train of epicyclodal right or spherical gears comprising either two wheels with fixed axis meshing with satellites, or only one wheel with fixed axis meshing with satellites, in which the rotation of each satellite causes the rotation of masses whose center of gravity is located outside their axis of rotation. According to the invention, the motor and resistance torques are applied in one case to both of the wheels with a fixed axis and in the other case to the planet carrier on the one hand and to the wheel with a fixed axis 'somewhere else.


2
Dans ces dispositifs, le couple transmis est de la forme C=k(nmnr) où nm est la vitesse de rotation de l'arbre moteur, n r celle de l'arbre récepteur et k un paramètre dont la valeur croît en particulier avec la valeur des masses associées aux satellites et avec l'excentrement de leur centre de gravite. Si le couple résistant appliqué à l'arbre récepteur est supérieur 2 kan2, l'arbre récepteur ne tourne pas mais est soumis à un couple statique
2 2 régal à knm s lorsque le couple résistant décroît de knm à 0, nr croît de 0 à n . Si un couple actif est appliqué directement à l'arbre récepteur et lui
m confère une vitesse nr, l'application à l'arbre moteur d'un couple de sens inverse et supérieur en valeur absolue à k(nm+nr)2 produit un freinage de l'arbre récepteur.
2
In these devices, the transmitted torque is of the form C = k (nmnr) where nm is the speed of rotation of the driving shaft, nr that of the receiving shaft and k a parameter whose value increases in particular with the value masses associated with the satellites and with the eccentricity of their center of gravity. If the resistive torque applied to the receiving shaft is greater than 2 kan2, the receiving shaft does not rotate but is subjected to a static torque
2 2 treat knm s when the resistive torque decreases from knm to 0, nr increases from 0 to n. If an active torque is applied directly to the receiving shaft and it
m gives a speed nr, the application to the motor shaft of a torque of opposite direction and greater in absolute value than k (nm + nr) 2 produces braking of the receiving shaft.

Selon une variante, l'excentrement du centre de gravité des masses associées aux satellites est modifiable par un moyen extérieur ou par l'action de la force centrifuge, si nécessaire jusqu'à une valeur faible ou nulle, de façon à réduire ou annuler le couple transmis. According to a variant, the eccentricity of the center of gravity of the masses associated with the satellites can be modified by an external means or by the action of centrifugal force, if necessary to a low or zero value, so as to reduce or cancel the transmitted torque.

Selon une forme de réalisation préférentielle, les masses associées aux satellites ont toutes la même valeur, ainsi que l'excentrement de leur centre de gravité, et le centre de gravité de l'ensemble des masses est situé en permanence sur l'axe de rotation du porte-satellites.  According to a preferred embodiment, the masses associated with the satellites all have the same value, as well as the eccentricity of their center of gravity, and the center of gravity of all the masses is permanently located on the axis of rotation. from the planet carrier.

Les dessins annexés illustrent l'invention. The accompanying drawings illustrate the invention.

La figure 1 représente schématiquement une forme de réalisation du
dispositif selon l'invention comportant un train épicycloïdal avec
une seule roue à axe fixe.Figure 1 schematically shows an embodiment of the
device according to the invention comprising an epicyclic train with
a single wheel with fixed axle.

La figure 2 représente schématiquement une autre forme de réalisa
tion comportant un train à deux roues à axe fixe.Figure 2 schematically shows another form of embodiment.
tion comprising a train with two wheels on a fixed axle.

Le dispositif représenté sur la figure 1 comporte une roue (1) engrenant avec des satellites (2) portés par un porte-satellites (3) ; chaque satellite porte une masse excentrée (4). Le couple moteur est appliqué à l'axe (5) du porte-satellites qui constitue l'arbre moteur et le couple résistant à l'axe (6) de la roue qui constitue l'arbre récepteur. L'ensemble est monté dans un carter (7). The device shown in Figure 1 comprises a wheel (1) meshing with satellites (2) carried by a planet carrier (3); each satellite carries an eccentric mass (4). The motor torque is applied to the axis (5) of the planet carrier which constitutes the motor shaft and the resistance torque to the axis (6) of the wheel which constitutes the receiving shaft. The assembly is mounted in a housing (7).

Dans la forme de réalisation selon la figure 2, le dispositif comporte deux roues (1) et (8) engrenant avec des satellites (2) portés par un porte-satellites (3) dont la rotation est libre ; les axes (9) des satellites portent les masses excentrées (4). Les couples moteur et résistant sont appliqués indifféremment aux axes (6) et (10) des roues (1) et (8). L'ensemble est monté dans un carter (7). In the embodiment according to Figure 2, the device comprises two wheels (1) and (8) meshing with satellites (2) carried by a planet carrier (3) whose rotation is free; the axes (9) of the satellites carry the eccentric masses (4). The motor and resistance torques are applied equally to the axes (6) and (10) of the wheels (1) and (8). The assembly is mounted in a housing (7).

Les dispositifs selon l'invention sont particulièrement destinés à l'entraînement de machines, de véhicules ou d'coutils à régime de fonctionnement variable par des moteurs à régime de fonctionnement variable. Ils peuvent aussi être utilisés comme organes de freinage actif dans les mêmes applications, soit spécifiquement, soit en alternance avec leur rôle de coupleurs en inversant le sens de rotation relatif des arbres moteur et récepteur. Ils sont également utilisables pour appliquer un couple de serrage ou un effort statique par l'intermédiaire de l'arbre récepteur.  The devices according to the invention are particularly intended for driving machines, vehicles or tools with variable operating speed by motors with variable operating speed. They can also be used as active braking devices in the same applications, either specifically or alternately with their role as couplers by reversing the relative direction of rotation of the motor and receiver shafts. They can also be used to apply a tightening torque or a static force through the receiving shaft.

Claims (6)

REVENDICATIONS 1) Dispositif mécanique pour transmettre un couple variable d'un arbre moteur à un arbre récepteur avec un rapport de leurs vitesses de rotation continuement et automatiquement variable constitué par tout train d'engrenages épicycloidal droit ou sphérique comportant soit deux roues à axe fixe (1) et (8) engrenant avec des satellites (2) portés par un portesatellites (3) à rotation libre, soit une seule roue à axe fixe (1) engrenant avec des satellites (2) portés par un porte-satellites (3), caractérisé en ce que la rotation de chaque satellite entraîne la rotation de masses (4) dont le centre de gravité est situé hors de leur axe de rotation, et en ce que les couples moteur et résistant sont appliqués dans un cas à l'un et l'autre des axes (6) et (10) des roues à axe fixe (1) et (8), et dans l'autre cas à l'axe (5) du porte-satellites (3) d'une part et à l'axe (6) de la roue à axe fixe (1) d'autre part. 1) Mechanical device for transmitting a variable torque from a driving shaft to a receiving shaft with a ratio of their rotation speeds continuously and automatically variable constituted by any train of right or spherical epicycloidal gears comprising either two wheels with fixed axis (1 ) and (8) meshing with satellites (2) carried by a satellite carrier (3) with free rotation, that is to say a single wheel with fixed axle (1) meshing with satellites (2) carried by a planet carrier (3), characterized in that the rotation of each satellite causes the rotation of masses (4) whose center of gravity is located outside their axis of rotation, and in that the motor and resistance torques are applied in one case to one and the other of the axes (6) and (10) of the wheels with fixed axis (1) and (8), and in the other case to the axis (5) of the planet carrier (3) on the one hand and to the axle (6) of the fixed axle wheel (1) on the other hand. 2) Dispositif selon la revendication 1 caractérisé en ce que l'excentrement du centre de gravité des masses associées aux satellites est modifiable par un moyen extérieur. 2) Device according to claim 1 characterized in that the eccentricity of the center of gravity of the masses associated with the satellites can be modified by external means. 3) Dispositif selon la revendication 1 caractérisé en ce que l'excen- trement du centre de gravité des masses associées aux satellites est modifiable par l'action de la force centrifuge. 3) Device according to claim 1 characterized in that the eccentricity of the center of gravity of the masses associated with the satellites can be modified by the action of centrifugal force. 4) Dispositif selon les revendications 2 ou 3 caractérisé en ce que l'excentrement du centre de gravité des masses associées aux satellites est modifiable Jusqu a une valeur nulle. 4) Device according to claims 2 or 3 characterized in that the eccentricity of the center of gravity of the masses associated with the satellites can be modified up to a zero value. 5) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que les masses associées aux satellites ont toutes la même valeur ainsi que l'excentrement de leur centre de gravité. 5) Device according to any one of the preceding claims, characterized in that the masses associated with the satellites all have the same value as well as the eccentricity of their center of gravity. 6) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que le centre de gravité de l'ensemble des masses associées aux satellites est situé en permanence sur l'axe de rotation du porte-satellites.  6) Device according to any one of the preceding claims, characterized in that the center of gravity of all the masses associated with the satellites is permanently located on the axis of rotation of the planet carrier.
FR9105281A 1991-04-26 1991-04-26 MECHANICAL TRANSMISSION DEVICE WITH CONTINUOUSLY AND AUTOMATICALLY VARIABLE SPEED RATIO. Expired - Fee Related FR2675874B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9105281A FR2675874B1 (en) 1991-04-26 1991-04-26 MECHANICAL TRANSMISSION DEVICE WITH CONTINUOUSLY AND AUTOMATICALLY VARIABLE SPEED RATIO.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9105281A FR2675874B1 (en) 1991-04-26 1991-04-26 MECHANICAL TRANSMISSION DEVICE WITH CONTINUOUSLY AND AUTOMATICALLY VARIABLE SPEED RATIO.

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FR2675874A1 true FR2675874A1 (en) 1992-10-30
FR2675874B1 FR2675874B1 (en) 1997-09-19

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FR9105281A Expired - Fee Related FR2675874B1 (en) 1991-04-26 1991-04-26 MECHANICAL TRANSMISSION DEVICE WITH CONTINUOUSLY AND AUTOMATICALLY VARIABLE SPEED RATIO.

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR603223A (en) * 1925-09-18 1926-04-12 Variable ratio reduction mechanism
GB493387A (en) * 1936-08-05 1938-10-07 Mario De Falco Improvements in or relating to variable speed power transmission mechanism
GB995305A (en) * 1962-06-11 1965-06-16 Boris Osman Automatic infinitely variable mechanical power transmission mechanism
US3728911A (en) * 1970-08-13 1973-04-24 W Granville Infinitely variable speed transmissions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR603223A (en) * 1925-09-18 1926-04-12 Variable ratio reduction mechanism
GB493387A (en) * 1936-08-05 1938-10-07 Mario De Falco Improvements in or relating to variable speed power transmission mechanism
GB995305A (en) * 1962-06-11 1965-06-16 Boris Osman Automatic infinitely variable mechanical power transmission mechanism
US3728911A (en) * 1970-08-13 1973-04-24 W Granville Infinitely variable speed transmissions

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FR2675874B1 (en) 1997-09-19

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