FR2660977A2 - Improvements to coupling reduction gears - Google Patents

Improvements to coupling reduction gears Download PDF

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Publication number
FR2660977A2
FR2660977A2 FR9005093A FR9005093A FR2660977A2 FR 2660977 A2 FR2660977 A2 FR 2660977A2 FR 9005093 A FR9005093 A FR 9005093A FR 9005093 A FR9005093 A FR 9005093A FR 2660977 A2 FR2660977 A2 FR 2660977A2
Authority
FR
France
Prior art keywords
clutch
toothed wheel
reduction gear
cones
bearing surfaces
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Withdrawn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
FR9005093A
Other languages
French (fr)
Inventor
Blanchard Robert
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR8902938A external-priority patent/FR2643958A1/en
Application filed by Individual filed Critical Individual
Priority to FR9005093A priority Critical patent/FR2660977A2/en
Publication of FR2660977A2 publication Critical patent/FR2660977A2/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/02Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00Friction clutches
    • F16D13/22Friction clutches with axially-movable clutching members
    • F16D13/24Friction clutches with axially-movable clutching members with conical friction surfaces cone clutches

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)

Abstract

The invention relates to improvements to the main Patent. The improvements consist in equipping the reduction gear with a clutch housed in the space occupied by the gearwheel of the coupling reduction gear. This clutch essentially consists of two opposed and symmetrical conical bearing surfaces formed in the bore of the gearwheel, and two corresponding male cones. The reduction gear finds a main application in the driving of automotive equipment.

Description

Perfectionnement aux Réducteurs Coupleurs. Improvement to Couplers Reducers.

Le brevet principal concerne un réducteur coupleur du Type comportant deux demi carters identiques renfermant l'ensemble du mécanisme de réduction à roue-dentée et vis sans fin, et un embrayage.The main patent relates to a type coupler reducer comprising two identical half-housings enclosing the entire gear and worm gear reduction mechanism, and a clutch.

Ce réducteur coupleur est caractérisé notamment en ce qu'il comporte deux demi carters identiques, renfermant Tensemble du mécanisme de réduction à roue dentée et vis sans fin et d'embrayage composé de disques de friction.This coupling reducer is characterized in particular that it comprises two identical half-housings, enclosing the entire gear reduction gear and worm gear and clutch composed of friction discs.

Suivant une caractéristique du brevet principal, le carter comporte une plaque de réaction, recevant l'effort axial de l'embrayage et le répartissant sur la quasitotalité de la surface frontale du dit carter assemblé.According to a feature of the main patent, the casing comprises a reaction plate, receiving the axial force of the clutch and distributing it on almost all of the frontal surface of said assembled casing.

Suivant une autre caractéristique du brevet principal, les deux demi carters identiques comportent des logements dans lesquels viennent prendre place des paliers lors de l'assemblage des deux demi carters, assurant ainsi leur positionnement respectif.According to another feature of the main patent, the two half identical housings include housing in which take place bearings during the assembly of the two half casings, thus ensuring their respective positioning.

Suivant une troisième caractéristique du brevet principal, l'arbre à came de commande de ltembrayage est disposé de façon telle que lors de sa rotation autour de son axe pendant l'action d'embrayage, l'effort axial qu'il exerce sur la fourchette d'embrayage va en augmentant.According to a third feature of the main patent, the camshaft of the clutch control is arranged so that during its rotation about its axis during the clutch action, the axial force that it exerts on the fork Clutch is going up.

L'ensemble de ce dispositif qui donne parfaitement satisfaction pour un usage normal , peut présenter quelques difficultés de tenue dans le temps spécialement en ce qui concerne l'embrayage. Dans certains cas, l'embrayage est amené à passer un couple relativement important avec une fréquence d'utilisation élevée.The whole of this device which gives perfectly satisfactory for normal use, may have some difficulties of holding in time especially with regard to the clutch. In some cases, the clutch is required to pass a relatively large torque with a high frequency of use.

Jusqu a ce jour, dans des dispositifs réducteurs de ce type, on a utilisé des embrayages multidisques en soi connus, qui présentent les inconvénients indiqués plus haut, et qui de plus, en raison de leur architecture propre ont un encombrement non désirable, et un nombre de composants qui ne permet pas une construction fiable et économique. Up to now, in reducing devices of this type, multi-disk clutches which are known per se have the disadvantages indicated above, and which, moreover, because of their inherent architecture, have an undesirable number of components that does not allow a reliable and economical construction.

La présente addition a en conséquence,. pour but un réducteur coupleur conforme à la revendication 1 du brevet principal, caractérisé en ce outil comporte dans l'espace occupé par la roue dentée, un embrayage qui est essentiellement constitué par une surface biconique ménagée dans l'alésage de ladite roue dentée, avec un axe de symétrie passant par le plan radial médiant de cette roue, cet alésage recevant, de part et d'autre dudit plan de symétrie, deux disques d'embrayage dont le listel est conique, qui sont pressés dans les cones correspondants de l'alésage de la roue, de manière à solidariser l'axe d'entrée dudit réducteur avec l'axe de sortie, lors de l'action d'embrayage, et inversement à déssolidariser les dits axes lors du débrayage.The present addition has accordingly. A coupler gear unit according to claim 1 of the main patent, characterized in that said tool comprises in the space occupied by the gear wheel, a clutch which is essentially constituted by a biconical surface formed in the bore of said gear wheel, with an axis of symmetry passing through the median radial plane of this wheel, this bore receiving, on either side of said plane of symmetry, two clutch discs whose listel is conical, which are pressed in the corresponding cones of the boring of the wheel, so as to secure the input axis of said gear with the output shaft, during the clutch action, and conversely to dislodge said axes when disengaging.

Suivant une autre caractéristique, les rondelles coniques d'embrayage situées de part et d'autre de la roue dentée, comportent en leur centre un dispositif destiné à solidariser en rotation les dites rondelles coniques avec l'axe de sortie, tout en leur permettant de se déplacer longitudinalement.According to another characteristic, the conical clutch washers located on either side of the toothed wheel, comprise in their center a device for securing in rotation the so-called conical washers with the output shaft, while allowing them to move longitudinally.

Grâce à cette disposition d'ensemble, on réduit le nombre de pièces nécessaires à la fonction embrayage, débrayage, on réduit l'inertie de commande, et on peut diminuer l'encombrement général du réducteur équipé de cet embrayage.With this overall arrangement, it reduces the number of parts required for the clutch function, disengagement, reduces the control inertia, and can reduce the overall size of the gearbox equipped with this clutch.

D'autres caractéristiques et avantages de l'invention ressortiront encore de la lecture de la description détaillée qui suit d'un mode de réalisation préféré de l'invention, donné ici à titre d'exemple et représenté sur les dessins joints dans lesquels
- la figure 1 est une vue en plan de l'ensemble du mécanisme dans
son carter.
Other features and advantages of the invention will become apparent from reading the following detailed description of a preferred embodiment of the invention, given here by way of example and shown in the accompanying drawings in which:
FIG. 1 is a plan view of the entire mechanism in
its crankcase.

- la figure 2 est une vue en perspective d'un demi carter, et,
détaché de celui-ci, d'un palier de sortie
- la figure 3 est une vue en coupe de la roue dentée et d'un cone
d'embrayage.
FIG. 2 is a perspective view of a half casing, and
detached from it, from an exit
- Figure 3 is a sectional view of the toothed wheel and a cone
Clutch.

Conformément à la description du brevet principal, l'ensemble du mécanisme est logé dans un carter constitué de deux demi carters identiques 1 , dans lesquels sont ménagers deux logements en forme demi circulaire 2 , dans lesquels viennent prendre place les paliers 3 de l'arbre de sortie 4... Ce modé-derconstruc"tion assure, lors de l'assemblage, un positionnement parfait de chaque demi carter l'un par rapport à l'autre.According to the description of the main patent, the entire mechanism is housed in a casing consisting of two identical half-casings 1, in which are housed two semi-circular housing 2, in which are taken place the bearings 3 of the shaft output 4 ... This model-derconstruc tion ensures, during assembly, a perfect positioning of each half casing relative to each other.

La plaque de réaction 5 , réalisée dans un matériau rigide, reçoit en final la poussée de l'action d'embrayage et assure, en répartissant cet effort sur l'ensemble de la surface frontale 6 du carter assemblé, la non déformation et la rigidification de ce dernier. The reaction plate 5, made of a rigid material, finally receives the thrust of the clutch action and ensures, by distributing this force over the entire front surface 6 of the assembled casing, the non deformation and stiffening of the last.

La vis sans fin 7 entraîne la roue dentée réceptrice 8 par son mouvement de rotation, en assurant ainsi la réduction de la vitesse. La roue dentée 8 comporte dans son alésage deux surfaces de révolution coniques 9 , dans lesquelles viennent se loger les deux cones d'embrayage 10 , lors de l'action d'embrayage.The worm 7 drives the receiving toothed wheel 8 by its rotational movement, thus ensuring the reduction of the speed. The toothed wheel 8 comprises in its bore two conical surfaces of revolution 9, in which are housed the two clutch cones 10, during the clutch action.

Les cones d'embrayage 10 comportent dans leur alésage, un évidement 11 , dans lequel vient se loger une pièce 12 solidaire de l'arbre de sortie. Ainsi les cones d'embrayage sont solidaires de l'arbre de sortie en rotation, mais libres de se déplacer suivant une direction parallèle à l'axe de l'arbre de sortie 4 , notamment, pendant la manoeuvre d'embrayage.The clutch cones 10 comprise in their bore, a recess 11, in which is housed a piece 12 integral with the output shaft. Thus the clutch cones are integral with the output shaft in rotation, but free to move in a direction parallel to the axis of the output shaft 4, in particular during the clutch maneuver.

Lors de l'action d'embrayage, on exerce un effort axial sur la butée 13 , par la rotation autour de son axe 14 de l'arbre à came 15 , qui agit axialement par l'intermédiaire de la fourchette 16
L'effort axial d'embrayage se transmet ainsi par la butée 13 , aux cones 10 sur les portées coniques internes 9 de la roue dentée 8 , assurant la solidarisation de l'ensemble.
During the clutch action, an axial force is exerted on the abutment 13, by the rotation about its axis 14 of the camshaft 15, which acts axially through the fork 16
The axial clutch force is thus transmitted by the stop 13, cones 10 on the internal conical bearing surfaces 9 of the toothed wheel 8, ensuring the fastening of the assembly.

A l'inverse, lors de la manoeuvre de débrayage, la rotation en l'autre sens de l'arbre à came 15 , permet le recul de la fourchette 16 et de la butée 13 permettant ainsi aux cones 10 de se dégager légèrement des portées coniques internes 9 de la roue dentée. I1 n > y a ainsi plus d'entrainement en rotation de l'arbre de sortie 4 . Seules,la vis sans-fin 7 et la roue dentée 8 continuent leur rotation. A ce moment, la roue dentée 8 se trouve guidée et positionnée suivant les trois axes orthogonaux seulement par le contact subsistant des portées coniques respectives femelles 9 de ladite roue dentée et mâles des cones 10 . On réalise de cette façon un maintient en position de la roue dentée 8 , qui est dit flottant, de façon très économique, sans aller chercher ce maintient sur l'arbre de sortie, ou tout autre organe ou dispositif.  Conversely, during the disengagement maneuver, the rotation in the other direction of the camshaft 15, allows the recoil of the fork 16 and the stop 13 thus allowing the cones 10 to be released slightly from the staves internal cones 9 of the toothed wheel. There is thus no more rotation drive of the output shaft 4. Only the endless screw 7 and the toothed wheel 8 continue their rotation. At this moment, the toothed wheel 8 is guided and positioned along the three orthogonal axes only by the remaining contact of the respective female conical bearing surfaces 9 of said toothed wheel and male cones 10. In this way, a maintenance is maintained in position of the toothed wheel 8, which is said to be floating, in a very economical manner, without seeking this support on the output shaft, or any other member or device.

Claims (2)

Revendicationsclaims 1. Un réducteur coupleur du type comportant essentiellement deux demi carters identiques 1 , renfermant l'ensemble du mécanisme de réduction à vis sans fin 7 et roue dentée 8 , et d'embrayage, caractérisé en ce que le mécanisme d'embrayage est composé de deux portées coniques symétriques et opposées femelles 9 recevant deux cones mâles 10 montés en opposition.1. A coupling reducer of the type comprising essentially two identical half-casings 1, enclosing the assembly of the worm gear reduction mechanism 7 and gear wheel 8, and clutch, characterized in that the clutch mechanism is composed of two conical and opposite female conical bearing surfaces 9 receiving two male cones 10 mounted in opposition. 2. Un réducteur coupleur selon revendication 1 , caractérisé en ce que, en position débrayage, les deux cones mâles 10 assurant le maintien en position de la roue dentée 8 , par l'intérmédiaire des portées coniques 9 de ladite roue dentée. 2. A coupler gear according to claim 1, characterized in that, in the disengaged position, the two male cones 10 ensuring the maintenance in position of the toothed wheel 8, through the conical bearing surfaces 9 of said toothed wheel.
FR9005093A 1989-03-02 1990-04-17 Improvements to coupling reduction gears Withdrawn FR2660977A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9005093A FR2660977A2 (en) 1989-03-02 1990-04-17 Improvements to coupling reduction gears

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8902938A FR2643958A1 (en) 1989-03-02 1989-03-02 Reduction gear/coupling
FR9005093A FR2660977A2 (en) 1989-03-02 1990-04-17 Improvements to coupling reduction gears

Publications (1)

Publication Number Publication Date
FR2660977A2 true FR2660977A2 (en) 1991-10-18

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ID=31716902

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9005093A Withdrawn FR2660977A2 (en) 1989-03-02 1990-04-17 Improvements to coupling reduction gears

Country Status (1)

Country Link
FR (1) FR2660977A2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704287A1 (en) * 1993-04-20 1994-10-28 France Reducteurs Sa Transmission device
US5601000A (en) * 1993-09-10 1997-02-11 Blanchard; Robert Gearbox with incorporated clutch for self-propelled machines
FR2822915A1 (en) * 2001-04-03 2002-10-04 Commerciale Et D Engineering S TRANSMISSION DEVICE BETWEEN A PRIMARY MOTOR SHAFT AND A LAWN MOWER OUTPUT SHAFT COMPRISING SUCH A DEVICE
FR2829091A1 (en) * 2001-08-29 2003-03-07 Commerciale Et D Engineering S TRANSMISSION BETWEEN A MOTOR COMPONENT AND A DRIVE SHAFT AND MOTOR VEHICLE EQUIPPED WITH SUCH A TRANSMISSION
US6705961B2 (en) 2000-07-14 2004-03-16 Tecumseh Products Company Variable speed transmission and electronic speed control therefor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704287A1 (en) * 1993-04-20 1994-10-28 France Reducteurs Sa Transmission device
US5601000A (en) * 1993-09-10 1997-02-11 Blanchard; Robert Gearbox with incorporated clutch for self-propelled machines
US6705961B2 (en) 2000-07-14 2004-03-16 Tecumseh Products Company Variable speed transmission and electronic speed control therefor
FR2822915A1 (en) * 2001-04-03 2002-10-04 Commerciale Et D Engineering S TRANSMISSION DEVICE BETWEEN A PRIMARY MOTOR SHAFT AND A LAWN MOWER OUTPUT SHAFT COMPRISING SUCH A DEVICE
FR2829091A1 (en) * 2001-08-29 2003-03-07 Commerciale Et D Engineering S TRANSMISSION BETWEEN A MOTOR COMPONENT AND A DRIVE SHAFT AND MOTOR VEHICLE EQUIPPED WITH SUCH A TRANSMISSION
US6789441B2 (en) 2001-08-29 2004-09-14 France Reducteurs Transmission between a motor member and a drive shaft and engine motor provided with such a transmission

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