FR2582761A1 - Free wheel with progressive effect for the starter member of electric starters - Google Patents

Free wheel with progressive effect for the starter member of electric starters Download PDF

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Publication number
FR2582761A1
FR2582761A1 FR8508368A FR8508368A FR2582761A1 FR 2582761 A1 FR2582761 A1 FR 2582761A1 FR 8508368 A FR8508368 A FR 8508368A FR 8508368 A FR8508368 A FR 8508368A FR 2582761 A1 FR2582761 A1 FR 2582761A1
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FR
France
Prior art keywords
rollers
ramps
springs
freewheel
free wheel
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Withdrawn
Application number
FR8508368A
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French (fr)
Inventor
Gerard Vilou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe de Paris et du Rhone SA
Original Assignee
Societe de Paris et du Rhone SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Societe de Paris et du Rhone SA filed Critical Societe de Paris et du Rhone SA
Priority to FR8508368A priority Critical patent/FR2582761A1/en
Publication of FR2582761A1 publication Critical patent/FR2582761A1/en
Withdrawn legal-status Critical Current

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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transmission Devices (AREA)

Abstract

The slope of the ramps 3 of some of the rollers of the free wheel has a wedging angle alpha which is smaller than that ss of the slopes of the other ramps, while the rollers 6 all have the same diameter. Under these conditions the rollers interacting with the ramps 3 wedge before the others and ensure an elastic deformation of the outer cage 1 of the free wheel which damps the transmission torque. Electric starter.

Description

Les lanceurs de démarreurs sont généralement pourvus d'une roue libre à galets, disposée entre l'entraineur de ce lanceur et le pignon qui vient engrener avec la grande couronne du moteur thermique. Starter launchers are generally provided with a free wheel with rollers, arranged between the trainer of this launcher and the pinion which meshes with the large crown of the heat engine.

Lorsqu'un couple moteur est applique sur l'entratneur, c'est-a- dire sur la cage extérieure de la roue libre, les galets se coincent entre la piste cylindrique centrale solidaire du pignon et des rampes menagées dans la cage extérieure. Il apparait ainsi des efforts de contact qui, du fait du coefficient d'adherence, permettent de transmettre le couple de la cage exterieure à la piste. When a driving torque is applied to the driver, that is to say to the outer cage of the freewheel, the rollers are wedged between the central cylindrical track secured to the pinion and ramps formed in the outer cage. It thus appears contact forces which, due to the coefficient of adhesion, make it possible to transmit the torque from the external cage to the track.

La force exercée par les galets sur leurs rampes respectives réalisées dans l'entratneur tend à déformer ce dernier, ce qui confère à la roue libre une certaine elasticité angulaire dans la transmission du mouvement. The force exerted by the rollers on their respective ramps produced in the driver tends to deform the latter, which gives the freewheel a certain angular elasticity in the transmission of movement.

L'effet élastique est d'autant plus important que l'angle de coincement est faible, par contre les pressions entre les galets, leurs rampes, et la piste centrale augmentent lorsque l'angle de coincement diminue. On sait que la roue libre fonctionne lorsque la vitesse du pignon devient plus grande que celle de la cage extérieure. Ceci se rencontre en particulier au passage des compressions et lors de la mise en marche définitive du moteur thermique. On comprend aisément qu'après avoir passé une compression, le pignon ralentisse, de telle sorte que la vitesse de l'entratneur devient superieure à celle de la piste centrale. Dans ces conditions, les ressorts associés aux galets les remettent en contact avec la piste et les rampes, de sorte que l'entrai- neur peut à nouveau transmettre le couple moteur du démarreur électrique. The elastic effect is all the more important as the wedging angle is low, on the other hand the pressures between the rollers, their ramps, and the central track increase when the wedging angle decreases. We know that the freewheel operates when the speed of the pinion becomes greater than that of the outer cage. This is encountered in particular during the passage of compressions and when the heat engine is finally started. It is easily understood that after having passed a compression, the pinion slows down, so that the speed of the driver becomes higher than that of the central track. Under these conditions, the springs associated with the rollers bring them back into contact with the track and the ramps, so that the coach can once again transmit the motor torque of the electric starter.

Toutefois, dans le cas du passage de compressions, la vitesse du pignon associé à la grande couronne du moteur thermique décroît brutalement.However, in the case of the passage of compressions, the speed of the pinion associated with the large crown of the heat engine decreases suddenly.

Les galets se coincent simultanément entre les rampes et la piste, de telle sorte que le réaccrochage du lanceur est très violent, ce qui peut produire des bruits importants et/ou entraîner des détériorations de différents organes du démarreur.The rollers are wedged simultaneously between the ramps and the track, so that the relaunching of the launcher is very violent, which can produce significant noise and / or cause damage to different organs of the starter.

Les perfectionnements qui font l'objet de la présente invention visent à remédier à ces inconvénients et à permettre la realisation d'une roue libre à réaccrochage progressif. The improvements which are the subject of the present invention aim to remedy these drawbacks and to allow the realization of a freewheel with progressive resetting.

A cet effet elle comporté des moyens permettant d'une part d'amortir le couple de transmission au debut de la solidarisation de l'organe menant et de celui mene, et d'autre part de transmettre ensuite intégralement à l'organe mené le couple développé par l'organe menant.  To this end, it comprises means making it possible, on the one hand, to damp the transmission torque at the start of the joining of the driving member and that of the driven one, and on the other hand to then transmit the torque fully to the driven member. developed by the leading organ.

Le dessin annexe, donne à titre d'exemple, permettra de mieux comprendre l'invention, les caracteristiques qu'elle presente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une coupe longitudinale d'un lanceur usuel de demarreur electrique pour moteur à combustion interne.The accompanying drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is likely to provide.
Fig. 1 is a longitudinal section of a conventional starter launcher for an internal combustion engine.

Fig. 2 illustre la manière dont chaque galet se coince par rapport à une rampe portée par la cage exterieure de la roue libre. Fig. 2 illustrates the way in which each roller gets stuck with respect to a ramp carried by the outer cage of the freewheel.

Fig. 3 est une vue en coupe transversale d'une roue libre établie conformément à l'invention. Fig. 3 is a cross-sectional view of a free wheel established in accordance with the invention.

Le lanceur pour démarreur électrique illustré en fig. 1 correspond à celui illustré dans le brevet français 2 432 620 de la présente
Demanderesse et dont la cage extérieure 1 de la roue libre est une pièce rapportée par rapport à l'entraîneur 2 proprement dit.The starter for electric starter illustrated in fig. 1 corresponds to that illustrated in French patent 2,432,620 of the present
Applicant and whose outer cage 1 of the freewheel is an added part with respect to the coach 2 itself.

Comme illustre en fig. 2, la cage exterieure 1 de la roue libre est pourvue de rampes obliques 3. Le pignon 4 du lanceur est associe à une piste cylindrique 5. Des galets pleins 6 non déformables, c'est-à-dire réalisés en acier à haute résistance, chargés par des ressorts 7, sont placés entre chaque rampe 3 et la piste 5. As illustrated in fig. 2, the outer cage 1 of the freewheel is provided with oblique ramps 3. The pinion 4 of the launcher is associated with a cylindrical track 5. Solid rollers 6 non-deformable, that is to say made of high strength steel , loaded by springs 7, are placed between each ramp 3 and the track 5.

Plus l'angle de coincement a détermine par les tangentes de chaque galet (fig. 2) respectivement par rapport à la rampe et à la piste cylindrique est faible, plus les pressions de contact du galet sur la rampe et sur la piste sont importantes. The smaller the wedging angle a determined by the tangents of each roller (fig. 2) relative to the ramp and the cylindrical track, the greater the contact pressures of the roller on the ramp and on the track.

Conformément à une première forme d'exécution de l'invention illustrée en fig. 3, la cage extérieure 1 est pourvue de deux séries de rampes 3, 3' de différentes pentes, de telle sorte que l'angle de coincement correspondant Ct ou ss est différent pour les rampes de chaque série. According to a first embodiment of the invention illustrated in FIG. 3, the outer cage 1 is provided with two series of ramps 3, 3 ′ of different slopes, so that the corresponding wedging angle Ct or ss is different for the ramps of each series.

C'est ainsi que dans l'exemple représenté, trois des galets 6 coopèrent avec des rampes 3 déterminant un angle de coincement c & plus faible que celui ss des trois autres rampes 3' de la cage 1. Thus, in the example shown, three of the rollers 6 cooperate with ramps 3 determining a wedging angle c & smaller than that ss of the other three ramps 3 'of the cage 1.

Ainsi, lorsque la cage 1 tourne dans le-sens horaire, les trois galets coopérant avec les rampes 3 viennent immédiatement se coincer entre celles-ci et la piste centrale 5. Les forces exercées par les galets sur la cage tendent à la déformer, ce qui confère une certaine elasticite angulaire dans la transmission du mouvement. Bien entendu, l'effet elastique est d'autant plus important que l'angle d est faible. Cette deformation élastique de la cage fait office d'amortisseuvEe couple. Thus, when the cage 1 rotates clockwise, the three rollers cooperating with the ramps 3 are immediately wedged between them and the central track 5. The forces exerted by the rollers on the cage tend to deform it, this which gives a certain angular elasticity in the transmission of movement. Of course, the elastic effect is all the more important the smaller the angle d. This elastic deformation of the cage acts as a torque damper.

Neanmoins, en raison des pressions de contact élevées, tout le couple de l'organe menant 1 ne peut pas.être transmis par les trois galets 3. Dès après cette periode d'amortissement, les autres galets 3 roulant sur la piste 5 et qui sont pousses par les ressorts 7 viennent à leur tour se coincer entre la piste centrale et les rampes. Ils assurent ainsi avec les autres galets la transmission du couple fourni par le moteur electrique du demarreur. However, due to the high contact pressures, all the torque of the driving member 1 cannot be transmitted by the three rollers 3. As soon as after this period of damping, the other rollers 3 rolling on track 5 and which are pushed by the springs 7 in their turn get stuck between the central track and the ramps. They thus ensure with the other rollers the transmission of the torque provided by the electric starter motor.

I1 va de soi qu'on pourrait également obtenir les mêmes résultats en affectant aux trois galets coopérant avec les rampes 3 un diamètre légèrement inférieur à celui des galets coopérant avec les rampes 3'. It goes without saying that the same results could also be obtained by assigning to the three rollers cooperating with the ramps 3 a diameter slightly smaller than that of the rollers cooperating with the ramps 3 '.

Mais bien entendu ces dernières auraient la même pente que celle des autres, de manière que toutes les rampes déterminent le meme angle de coincement CC . Lors du reaccrochage du lanceur, les galets à plus petit diamètre, pousses par les ressorts, sont les premiers à transmettre à nouveau une partie du couple moteur. Les forces de contact etant importantes, elles provoquent une deformation elastique notable de la cage exterieure formant amortisseur de couple. Puis, comme dans le cas précédent, la deformation de la cage permet l'engagement des autres galets entre les rampes et la piste interieure pour que tout le couple moteur puisse être transmis par l'ensemble des galets.But of course the latter would have the same slope as that of the others, so that all the ramps determine the same angle of wedging CC. When the starter is re-attached, the smaller diameter rollers, pushed by the springs, are the first to transmit again part of the engine torque. The contact forces being large, they cause a noticeable elastic deformation of the outer cage forming a torque damper. Then, as in the previous case, the deformation of the cage allows the engagement of the other rollers between the ramps and the inner track so that all the engine torque can be transmitted by all of the rollers.

On pourrait encore combiner le mode d'exécution à~angles differents des rampes 3 avec des ressorts engendrant des reactions differentes, c'est-à-dire que la force exercee par les ressorts sur les galets assurant le coincement initial serait inferieure à celle que les ressorts des autres galets applique sur ceux-ci. We could also combine the embodiment at ~ different angles of the ramps 3 with springs generating different reactions, that is to say that the force exerted by the springs on the rollers ensuring the initial jamming would be less than that the springs of the other rollers applied to them.

On pourrait également envisager que les rampes soient toutes identiques ainsi que les galets et que seules deux series de ressorts presentent des caracteristiques differentes en vue d'appliquer des forces également differentes sur les galets correspondants. One could also consider that the ramps are all identical as well as the rollers and that only two series of springs have different characteristics in order to apply equally different forces on the corresponding rollers.

I1 doit d'ailleurs être entendu que la description qui prOcède n'a ete donnee qu'a titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les details d'execution decrits par tous autres equivalents. En particulier, le nombre des galets destines à se coincer immédiatement n'est pas limite, pas plus que celui des autres galets.  It should moreover be understood that the description which precedes has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the details of execution described by all other equivalents. In particular, the number of rollers intended to be caught immediately is not limited, any more than that of the other rollers.

Claims (5)

REVENDICATIONS 1. Roue libre à galets du genre dont la cage extérieure menante (1) comporte des rampes obliques (3) permettant le coincement de galets (6) pleins non deformables par rapport à la piste cylindrique (5) de l'organe mene (4), caracterisee en ce qu'elle comporte des moyens permettant d'une part d'amortir le couple de transmission au début de la solidarisation de l'organe menant (1) et de celui mené (4), et d'autre part de transmettre ensuite intégralement à l'organe mene le couple developpé par l'organe menant. 1. Freewheel with rollers of the kind whose outer drive cage (1) comprises oblique ramps (3) allowing the jamming of rollers (6) full non deformable relative to the cylindrical track (5) of the drive member (4 ), characterized in that it comprises means making it possible, on the one hand, to damp the transmission torque at the start of the joining of the driving member (1) and that of the driven one (4), and on the other hand to then fully transmit to the drive body the torque developed by the drive. 2. Roue libre suivant la revendication 1, caractérisée en ce que la pente de la rampe (3) drau moins un galet présente un angle de coincement (Ct ) plus petit que celui ( ss ) des pentes des autres rampes (3'). 2. Freewheel according to claim 1, characterized in that the slope of the ramp (3) drau at least one roller has a wedging angle (Ct) smaller than that (ss) of the slopes of the other ramps (3 '). 3. Roue libre suivant la revendication 1, caractérisée en ce que les rampes (3) présentent toutes la même pente, tandis que certains des galets ont un diamètre plus important que celui des autres. 3. Freewheel according to claim 1, characterized in that the ramps (3) all have the same slope, while some of the rollers have a larger diameter than the others. 4. Roue libre suivant l'une quelconque des revendications 1 et 2, caractérisée en ce que la force exercée par les ressorts (7) sur les galets (6) d'une première série est inferieure à celle que les ressorts d'une seconde série de galets appliquent sur ceux-ci. 4. Freewheel according to any one of claims 1 and 2, characterized in that the force exerted by the springs (7) on the rollers (6) of a first series is less than that of the springs of a second series of rollers apply on them. 5. Roue libre suivant la revendication 2, caracterisée ce que le ou les ressorts de poussée du ou des galets qui se coincent en premier exercent sur lui ou sur eux une force plus faible que celle des ressorts agissant sur les autres galets.  5. Freewheel according to claim 2, characterized in that the thrust spring or springs of the roller (s) which get stuck first exert on it or on them a weaker force than that of the springs acting on the other rollers.
FR8508368A 1985-05-30 1985-05-30 Free wheel with progressive effect for the starter member of electric starters Withdrawn FR2582761A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8508368A FR2582761A1 (en) 1985-05-30 1985-05-30 Free wheel with progressive effect for the starter member of electric starters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8508368A FR2582761A1 (en) 1985-05-30 1985-05-30 Free wheel with progressive effect for the starter member of electric starters

Publications (1)

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FR2582761A1 true FR2582761A1 (en) 1986-12-05

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FR8508368A Withdrawn FR2582761A1 (en) 1985-05-30 1985-05-30 Free wheel with progressive effect for the starter member of electric starters

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FR (1) FR2582761A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041305A1 (en) * 1999-03-29 2000-10-04 Koyo Seiko Co., Ltd. One-way clutch
EP1469196A1 (en) 2003-04-16 2004-10-20 Ntn Corporation Starter pulley with integral clutch
WO2013060592A1 (en) * 2011-10-24 2013-05-02 Robert Bosch Gmbh Roller-type freewheel, starter device and method for the same
CN104019154A (en) * 2012-12-10 2014-09-03 罗伯特·博世有限公司 Free-wheel clutch
EP2985487A4 (en) * 2013-03-12 2017-01-25 JTEKT Corporation One-way clutch for wind power generation device, and wind power generation device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1947703A (en) * 1931-05-25 1934-02-20 Free Wheeling Patents Corp Roller clutch
US3034364A (en) * 1960-03-02 1962-05-15 Littell Machine Co F J Mechanical lock-up means for overriding drives
US3072233A (en) * 1959-06-29 1963-01-08 Weskenson Corp Overrunning clutches
DE2060690A1 (en) * 1970-12-10 1972-06-15 Borg Warner Stieber Gmbh Pinch roller overrunning clutch
US3820640A (en) * 1971-05-04 1974-06-28 Torrington Co Unidirectional clutch
WO1985001333A1 (en) * 1983-09-12 1985-03-28 Mitsubishi Denki Kabushiki Kaisha Overrunning clutch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1947703A (en) * 1931-05-25 1934-02-20 Free Wheeling Patents Corp Roller clutch
US3072233A (en) * 1959-06-29 1963-01-08 Weskenson Corp Overrunning clutches
US3034364A (en) * 1960-03-02 1962-05-15 Littell Machine Co F J Mechanical lock-up means for overriding drives
DE2060690A1 (en) * 1970-12-10 1972-06-15 Borg Warner Stieber Gmbh Pinch roller overrunning clutch
US3820640A (en) * 1971-05-04 1974-06-28 Torrington Co Unidirectional clutch
WO1985001333A1 (en) * 1983-09-12 1985-03-28 Mitsubishi Denki Kabushiki Kaisha Overrunning clutch

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041305A1 (en) * 1999-03-29 2000-10-04 Koyo Seiko Co., Ltd. One-way clutch
US6311814B1 (en) 1999-03-29 2001-11-06 Koyo Seiko Co., Ltd. One-way clutch
EP1469196A1 (en) 2003-04-16 2004-10-20 Ntn Corporation Starter pulley with integral clutch
WO2013060592A1 (en) * 2011-10-24 2013-05-02 Robert Bosch Gmbh Roller-type freewheel, starter device and method for the same
CN104011418A (en) * 2011-10-24 2014-08-27 罗伯特·博世有限公司 Roller-type freewheel, starter device and method for same
CN104019154A (en) * 2012-12-10 2014-09-03 罗伯特·博世有限公司 Free-wheel clutch
EP2985487A4 (en) * 2013-03-12 2017-01-25 JTEKT Corporation One-way clutch for wind power generation device, and wind power generation device

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