FR2754035A1 - Differential transmission for front wheel drive motor vehicles - Google Patents

Differential transmission for front wheel drive motor vehicles Download PDF

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Publication number
FR2754035A1
FR2754035A1 FR9611782A FR9611782A FR2754035A1 FR 2754035 A1 FR2754035 A1 FR 2754035A1 FR 9611782 A FR9611782 A FR 9611782A FR 9611782 A FR9611782 A FR 9611782A FR 2754035 A1 FR2754035 A1 FR 2754035A1
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FR
France
Prior art keywords
housing
axis
differential
transmission device
cover
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.)
Granted
Application number
FR9611782A
Other languages
French (fr)
Other versions
FR2754035B1 (en
Inventor
Didier Callac
Jean Philippe Raquin
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.)
Renault SAS
Original Assignee
Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Priority to FR9611782A priority Critical patent/FR2754035B1/en
Publication of FR2754035A1 publication Critical patent/FR2754035A1/en
Application granted granted Critical
Publication of FR2754035B1 publication Critical patent/FR2754035B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • F16H2048/082—Differential gearings with gears having orbital motion comprising bevel gears characterised by the arrangement of output shafts
    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • F16H2048/085—Differential gearings with gears having orbital motion comprising bevel gears characterised by shafts or gear carriers for orbital gears
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022—Adjustment of gear shafts or bearings
    • F16H2057/0221—Axial adjustment
    • 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
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H48/40—Constructional details characterised by features of the rotating cases
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H55/18—Special devices for taking up backlash
    • F16H55/20—Special devices for taking up backlash for bevel gears

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Transmission Devices (AREA)

Abstract

The transmission unit is composed in one part of a housing (1) which encloses the shaft of a differential (2) supported on its ends in two openings (7) in the housing (1). The torque is transferred by the intermediary of two satellite gears (3) to the two exit coaxial planet gears (4,5). The other part consists of a closing cover (6) of the housing (1) fixed on it by fixing screws (8). The openings (7) have an oblong form which allows the shaft (2) to move in the latter when the cover (6) is clamped onto the housing (1) in view of overcoming the operating play inside the mechanism.

Description

DISPOSITIF DE TRANSMISSION POUR VEHICULE
AUTOMOBILE
La présente invention se rapporte au domaine technique des transmissions. Plus précisément, elle concerne un différentiel de transmission, notamment pour essieu avant de véhicule automobile à groupe moto-propulseur transversal.TRANSMISSION DEVICE FOR VEHICLE
AUTOMOTIVE
The present invention relates to the technical field of transmissions. More specifically, it relates to a transmission differential, in particular for the front axle of a motor vehicle with a transverse powertrain.

Les différentiels de véhicules routiers comportent de façon classique un boîtier recevant le mouvement d'une couronne d'entrée rapportée sur celui-ci, ce boîtier transmettant à son tour le mouvement à deux planétaires de sortie coaxiaux, par l'intermédiaire d'un axe de différentiel, et de satellites.Differentials for road vehicles conventionally include a housing receiving the movement of an input crown attached thereto, this housing in turn transmitting the movement to two planetary coaxial output, via an axis differential, and satellites.

Par la publication EP 0.614.778, on connaît un différentiel de ce type, dont le boîtier est fermé par un couvercle portant contre l'un des planétaires, de façon à repousser celui-ci en direction des satellites, lors de son montage sur le boîtier.By publication EP 0.614.778, a differential of this type is known, the housing of which is closed by a cover bearing against one of the planetaries, so as to push the latter towards the satellites, when it is mounted on the housing.

Cette architecture présente notamment l'avantage de limiter les défauts de coaxialité entre les roulements du différentiel, et d'augmenter la rigidité de ce dernier.This architecture has in particular the advantage of limiting the coaxiality defects between the bearings of the differential, and of increasing the rigidity of the latter.

Conformément aux disposition habituelles dans ce domaine, le montage du différentiel décrit dans la publication EP 0.614.778 laisse subsister un jeu de fonctionnement entre les différents éléments du mécanisme, notamment entre les satellites et le planétaire qui n'est pas sollicité par le couvercle.In accordance with the usual provisions in this field, the mounting of the differential described in the publication EP 0.614.778 leaves a clearance of operation between the various elements of the mechanism, in particular between the satellites and the planet gear which is not stressed by the cover.

En fonctionnement, ces jeux sont à l'origine de chocs internes dans le mécanisme à chaque mise en contact brutale des pièces sous l'effet du passage ou de l'interruption du couple. Ces claquements, transmis à la chaîne cinématique, pénalisent lourdement le véhicule en termes de confort et de niveau acoustique.In operation, these games are the source of internal shocks in the mechanism each time the parts come into abrupt contact under the effect of the passage or interruption of the torque. These clicks, transmitted to the kinematic chain, severely penalize the vehicle in terms of comfort and acoustic level.

La présente invention vise à réduire les jeux de fonctionnement au sein d'un mécanisme différentiel.The present invention aims to reduce the operating clearances within a differential mechanism.

Elle a pour objet un dispositif de transmission, notamment pour véhicule automobile, comportant d'une part un boîtier qui renferme un axe de différentiel maintenu par ses extrémités dans deux orifices du boîtier transférant le couple par l'intermédiaire de satellites à deux planétaires de sortie coaxiaux, et d'autre part un couvercle de fermeture du boîtier fixé sur celui-ci par des vis de serrage. Ce dispositif est caractérisé en ce que les orifices ont une forme oblongue permettant à l'axe de se déplacer dans ces derniers lors du serrage du couvercle sur le boîtier en vue de supprimer les jeux de fonctionnement internes du mécanisme.It relates to a transmission device, in particular for a motor vehicle, comprising on the one hand a housing which contains a differential axis held by its ends in two orifices of the housing transferring the torque by means of satellites with two planetary output coaxial, and secondly a housing closure cover fixed thereon by clamping screws. This device is characterized in that the orifices have an oblong shape allowing the axis to move in the latter when the cover is tightened on the housing in order to eliminate the internal operating clearances of the mechanism.

Le serrage des vis entraîne notamment la poussée d'un premier planétaire au fond du boîtier. The tightening of the screws in particular causes the thrust of a first sun gear at the bottom of the housing.

Ce recul du premier planétaire s'accompagne d'un déplacement du second planétaire en direction de l'axe du différentiel, sous la poussée du couvercle.This retraction of the first sun gear is accompanied by a displacement of the second sun gear towards the axis of the differential, under the thrust of the cover.

De façon préférentielle, l'axe se déplace le long de tiges de coulissement orientées parallèlement à l'axe longitudinal du différentiel.Preferably, the axis moves along sliding rods oriented parallel to the longitudinal axis of the differential.

D'autres caractéristiques et avantages de l'invention apparaîtront clairement à la lecture de la description suivante d'un mode de réalisation particulier de celle-ci, en liaison avec les dessins annexés, sur lesquels - les figures 1 et 2, représentent un différentiel conforme à
l'invention en coupe longitudinale, avant et après le serrage de son
couvercle, et - la figure 3 correspond à une vue selon F de la figure 2.Other characteristics and advantages of the invention will appear clearly on reading the following description of a particular embodiment thereof, in conjunction with the appended drawings, in which - Figures 1 and 2, represent a differential in accordance with
the invention in longitudinal section, before and after tightening its
cover, and - Figure 3 corresponds to a view along F of Figure 2.

Le différentiel apparaissant sur les figures, présente un boîtier 1 supportant une couronne d'entrée de mouvement la, et renfermant un axe 2, qui entraîne un ensemble de satellites 3 transmettant euxmêmes le mouvement à deux planétaires de sortie coaxiaux 4, 5. Le boîtier 1 est fermé par un couvercle 6, fixé sur celui-ci par des vis de serrage 8.The differential appearing in the figures has a housing 1 supporting a movement input ring 1a, and containing an axis 2, which drives a set of satellites 3 themselves transmitting the movement to two coaxial output planets 4, 5. The housing 1 is closed by a cover 6, fixed on the latter by clamping screws 8.

De façon classique, l'axe 2 est logé à chacune de ses extrémités dans des orifices 7 du boîtier, traversant de part en part la paroi de celui ci. Alors que selon la technique connue, les orifices de logement de l'axe du différentiel dans le boîtier sont circulaires, le boîtier 1 du différentiel de l'invention présente des orifices 7 dont la forme oblongue, permet à l'axe 2 de disposer d'un jeu J, mis en évidence sur la figure 3? pour se positionner à l'intérieur du boîtier 1.Typically, the axis 2 is housed at each of its ends in orifices 7 of the housing, passing right through the wall thereof. While according to the known technique, the housing openings of the differential axis in the housing are circular, the housing 1 of the differential of the invention has orifices 7 whose oblong shape allows the axis 2 to have 'a game J, highlighted in Figure 3? to position itself inside the housing 1.

Conformément à l'invention, la mobilité de l'axe 2 à l'intérieur du boîtier 1 autorisée par la forme allongée des orifices 7, est contrôlée par des tiges de coulissement 11, orientées selon l'axe longitudinal du différentiel, de façon à imposer à l'axe 2 de se déplacer parallèlement à lui-même. Lors du serrage du couvercle, le déplacement de l'axe 2 le long des tiges 11 permet de rattraper les jeux de fonctionnement internes du mécanisme.According to the invention, the mobility of the axis 2 inside the housing 1 authorized by the elongated shape of the orifices 7, is controlled by sliding rods 11, oriented along the longitudinal axis of the differential, so as to force axis 2 to move parallel to itself. When tightening the cover, the movement of the axis 2 along the rods 11 makes it possible to make up for the internal operating clearances of the mechanism.

Les figures 1 et 2 mettent en évidence que, le serrage des vis 8 se traduit par un rapprochement du boîtier 1 en direction du couvercle 6, entraînant à droite le serrage d'un premier joint 1 la entre le boîtier 1, et le planétaire droit 4, et le placage de l'axe 2 contre le boîtier 1. En d'autres termes, le serrage des vis 8 se traduit par le déplacement du planétaire droit 4 au fond du boîtier 1 sous la poussée de l'axe 2. Du fait que le boîtier 1 vient alors porter contre le planétaire droit 4, en serrant un premier joint 1 la, le placage de l'axe 2 contre l'extrémité droite 7a du trou oblong 7 permet de supprimer, à droite, les jeux de fonctionnement existant avant le serrage entre le planétaire droit 4, les satellites 3 coopérant avec celui-ci, et l'axe 2. Figures 1 and 2 highlight that, the tightening of the screws 8 results in a bringing together of the housing 1 in the direction of the cover 6, causing on the right the tightening of a first seal 1 la between the housing 1, and the right sun gear 4, and the plating of the axis 2 against the housing 1. In other words, the tightening of the screws 8 results in the displacement of the right sun gear 4 at the bottom of the housing 1 under the thrust of the axis 2. From fact that the housing 1 then comes to bear against the right sun gear 4, by tightening a first seal 11a, the plating of the axis 2 against the right end 7a of the oblong hole 7 makes it possible to eliminate, on the right, the operating clearances existing before tightening between the right sun gear 4, the satellites 3 cooperating with it, and the axis 2.

A gauche, le serrage des vis 8 entraîne le serrage d'un second joint 1 lb entre le boitier 1 et le couvercle 6, et la poussée du planétaire droit 5 contre les satellites 3 coopérant avec celui-ci et l'axe 2, sous la poussée du couvercle 6 contre l'arrière du planétaire gauche 5.On the left, the tightening of the screws 8 causes the tightening of a second seal 1 lb between the case 1 and the cover 6, and the thrust of the right sun gear 5 against the satellites 3 cooperating with it and the axis 2, under the thrust of the cover 6 against the rear of the left sun gear 5.

Cette compression se traduit par la suppression des jeux de fonctionnement existant, avant le serrage, entre ces éléments.This compression results in the elimination of the existing operating clearances, before tightening, between these elements.

Etant donné que d'une manière générale, les engrenages coniques ont un meilleur fonctionnement lorsqu'ils travaillent sans jeu, les dispositions proposées par l'invention permettent d'une part d'améliorer la tenue mécanique des planétaires et des satellites, donc d'augmenter la durée de vie de ces derniers, et d'autre part de supprimer en grande partie les bruits de claquement évoqués cidessus. Since, in general, the bevel gears function better when they work without play, the arrangements proposed by the invention make it possible, on the one hand, to improve the mechanical strength of the planetary and of the satellites, therefore to increase the lifespan of the latter, and on the other hand to largely eliminate the clicking noises mentioned above.

Claims (6)

REVENDICATIONS supprimer les jeux de fonctionnement internes du mécanisme. lors du serrage du couvercle (6) sur le boîtier (1) en vue de oblongue permettant à l'axe (2) de se déplacer dans ces derniers (8), caractérisé en ce que les orifices (7) ont une forme fermeture du boîtier (1) fixé sur celui-ci par des vis de serrage sortie (4, 5) coaxiaux, et d'autre part un couvercle (6) de couple par l'intermédiaire de satellites (3) à deux planétaires de extrémités dans deux orifices (7) du boîtier (1), transférant leCLAIMS remove the internal working clearances of the mechanism. when tightening the cover (6) on the housing (1) in an oblong view allowing the axis (2) to move in the latter (8), characterized in that the orifices (7) have a closed form of the housing (1) fixed thereon by coaxial output clamping screws (4, 5), and on the other hand a torque cover (6) by means of satellites (3) with two planetary ends in two holes (7) of the housing (1), transferring the (1) qui renferme un axe de différentiel (2) maintenu par ses (1) which contains a differential axis (2) held by its automobile, comportant d'une part un boîtier d'entraînement automobile, comprising on the one hand a drive unit [1] Dispositif de transmission, notamment pour véhicule[1] Transmission device, in particular for a vehicle premier planétaire (4) au fond du boîtier (1). first planet (4) at the bottom of the housing (1). en ce que le serrage des vis (8) entraîne la poussée d'un in that the tightening of the screws (8) causes the thrust of a [2] Dispositif de transmission selon la revendication 1, caractérisé[2] Transmission device according to claim 1, characterized l'intermédiaire de satellites (3), sous la poussée de l'axe (2). via satellites (3), under the thrust of the axis (2). caractérisé en ce que le premier planétaire (4) se déplace par characterized in that the first planet (4) moves by [3] Dispositif de transmission selon la revendication 1 ou 2, [3] Transmission device according to claim 1 or 2, direction de l'axe (2), par le couvercle (6) du différentiel.  direction of the axis (2), by the cover (6) of the differential. caractérisé en ce que le second planétaire (5) est repoussé en characterized in that the second sun gear (5) is pushed back in [4] Dispositif de transmission selon la revendication 1, 2 ou 3,[4] Transmission device according to claim 1, 2 or 3, joint (lia), entre le boîtier (1) et le premier planétaire (4). seal (lia), between the housing (1) and the first sun gear (4). caractérisé en ce que le serrage des vis (8) permet de serrer un characterized in that the tightening of the screws (8) makes it possible to tighten a [5] Dispositif de transmission selon la revendication 2, 3 ou 4,[5] Transmission device according to claim 2, 3 or 4, longitudinal du différentiel.  longitudinal of the differential. tiges de coulissement (10) orientées parallèlement à l'axe sliding rods (10) oriented parallel to the axis précédentes, caractérisé en ce que l'axe (2) se déplace le long de previous, characterized in that the axis (2) moves along [6] Dispositif de transmission selon l'une des revendications[6] Transmission device according to one of claims
FR9611782A 1996-09-27 1996-09-27 TRANSMISSION DEVICE FOR MOTOR VEHICLE Expired - Fee Related FR2754035B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9611782A FR2754035B1 (en) 1996-09-27 1996-09-27 TRANSMISSION DEVICE FOR MOTOR VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9611782A FR2754035B1 (en) 1996-09-27 1996-09-27 TRANSMISSION DEVICE FOR MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
FR2754035A1 true FR2754035A1 (en) 1998-04-03
FR2754035B1 FR2754035B1 (en) 1998-11-27

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Family Applications (1)

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FR9611782A Expired - Fee Related FR2754035B1 (en) 1996-09-27 1996-09-27 TRANSMISSION DEVICE FOR MOTOR VEHICLE

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1571372A2 (en) 2004-03-06 2005-09-07 Audi Ag Differential for an automotive vehicle
EP1803973A1 (en) * 2005-12-27 2007-07-04 ELASIS - Società Consortile per Azioni Differential assembly provided with an adjustment device, in particular for motor vehicles
RU2522807C1 (en) * 2012-12-19 2014-07-20 Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" Differential gear

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148269A (en) * 1967-02-07 1969-04-10 Vauxhall Motors Ltd Differential gear assemblies
US4959043A (en) * 1989-08-29 1990-09-25 Chrysler Corporation Multi-pinion differential assembly
US5273498A (en) * 1992-12-07 1993-12-28 New Venture Gear, Inc. Differential mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148269A (en) * 1967-02-07 1969-04-10 Vauxhall Motors Ltd Differential gear assemblies
US4959043A (en) * 1989-08-29 1990-09-25 Chrysler Corporation Multi-pinion differential assembly
US5273498A (en) * 1992-12-07 1993-12-28 New Venture Gear, Inc. Differential mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1571372A2 (en) 2004-03-06 2005-09-07 Audi Ag Differential for an automotive vehicle
DE102004011057B4 (en) * 2004-03-06 2006-08-24 Audi Ag Differential gear for motor vehicles
EP1571372A3 (en) * 2004-03-06 2008-01-23 Audi Ag Differential for an automotive vehicle
EP1803973A1 (en) * 2005-12-27 2007-07-04 ELASIS - Società Consortile per Azioni Differential assembly provided with an adjustment device, in particular for motor vehicles
WO2007074151A1 (en) * 2005-12-27 2007-07-05 ELASIS - Società Consortile per Azioni Differential assembly provided with an adjustment device, in particular for motor vehicles
US8167761B2 (en) 2005-12-27 2012-05-01 ELASIS—Società Consortile per Azioni Differential assembly provided with an adjustment device, in particular for motor vehicles
RU2522807C1 (en) * 2012-12-19 2014-07-20 Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" Differential gear

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Publication number Publication date
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