EP1957809A1 - Transmission device for a rotational movement with a flexible shaft in a duct comprising zones forming a bearing and an internal tube - Google Patents

Transmission device for a rotational movement with a flexible shaft in a duct comprising zones forming a bearing and an internal tube

Info

Publication number
EP1957809A1
EP1957809A1 EP06794196A EP06794196A EP1957809A1 EP 1957809 A1 EP1957809 A1 EP 1957809A1 EP 06794196 A EP06794196 A EP 06794196A EP 06794196 A EP06794196 A EP 06794196A EP 1957809 A1 EP1957809 A1 EP 1957809A1
Authority
EP
European Patent Office
Prior art keywords
core
sheath
transmission device
bearing
tube
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Withdrawn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
EP06794196A
Other languages
German (de)
French (fr)
Inventor
Denis Tores
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.)
Inderflex-Technoflex
Inderflex Technoflex
Original Assignee
Inderflex-Technoflex
Inderflex Technoflex
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 Inderflex-Technoflex, Inderflex Technoflex filed Critical Inderflex-Technoflex
Publication of EP1957809A1 publication Critical patent/EP1957809A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/06—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable slidable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/02246—Electric motors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/02246—Electric motors therefor
    • B60N2/02253—Electric motors therefor characterised by the transmission between the electric motor and the seat or seat parts
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
    • F16C1/06—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements with guiding sheathing, tube or box
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/26—Construction of guiding-sheathings or guiding-tubes
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/24—Lubrication; Lubricating equipment
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/08—Vehicle seats, e.g. in linear movable seats

Definitions

  • the invention relates to a device for transmitting a rotational movement and an adjustment system for a motor vehicle seat comprising such a device.
  • Rotational transmission devices which comprise a flexible shaft and a sheath inside which the shaft is housed.
  • the rotational speeds of the shaft in the sheath are greater than 2000 revolutions / minute, typically of the order of 3000 revolutions / minute.
  • FR-1 563 195 proposes a rotation transmission device whose sheath has at least one deformation in the form of a bearing zone which is obtained by plastic deformation of the core of the sheath, this zone comprises at least three parts, two outer parts and a central part. These parts have axes substantially parallel to that of the core and are of diameter substantially equal to that of the core, the outer portions being substantially coaxial and of axis offset from the axes of the central portion and the core. . Indeed, this zone forming a plateau, by creating points of contact between the shaft and the sheath, makes it possible to limit the vibrations.
  • this document proposes to perform a flocking of fibers on the inner surface of the core of the sheath.
  • the flocking wears with intensive use of the rotation transmission device.
  • the shaft is made by a winding of metal son and has an outer surface that is not smooth. The fibers of the flocking are likely to catch in the asperities of the outer surface of the shaft and be torn off during the rotation of the shaft.
  • the invention aims to overcome these drawbacks by proposing a device for transmitting a rotational movement whose sheath has permanent deformations which are arranged to limit the vibrations without reducing the inside diameter of the sheath and comprising an inner tube having the same deformations.
  • the invention relates to a device for transmitting a rotational movement comprising a flexible shaft and a sheath inside which the shaft is housed, said sheath comprising a core formed of a hollow cylinder whose inner diameter is arranged to allow rotation of said shaft within said core, the core comprising at least one bearing zone which is obtained by plastic deformation, said zone comprising at least three parts, two parts and a central portion, said portions having axes substantially parallel to that of the core and being of diameter substantially equal to that of the core, the outer portions being substantially coaxial and of offset axis with respect to the axes of the portion and core, said device further comprising an inner tube disposed within the core and whose outer diameter is substantially equal to the diameter The interior of the core and the inner diameter are arranged to allow rotation of said shaft within said tube, the tube being deformed in the same manner as the core in the bearing zone.
  • the inner surface of the tube is smooth and thus allows to limit the friction between the shaft and the sheath.
  • the tube is made of plastic material, which prevents metal contacts between them, reducing noise and wear of materials.
  • the central portion of the bearing zone and the core of the sheath are substantially coaxial.
  • the sheath comprises a plurality of bearing zones spaced from one another by a distance of between 5 and 15 centimeters. In another embodiment, the zones are arranged continuously along the sheath.
  • the undistorted inner tube is introduced into the undeformed core, and then the deformations creating the bearing regions are carried out simultaneously on the core and on the inner tube.
  • the invention relates to an adjustment system for a motor vehicle seat, comprising at least one adjustment slide mounted on the structure of the vehicle and adjustable means for fixing the seat on the slide, the system further comprising a driving motor having at least one rotating output.
  • the system further comprises a rotational movement transmitting device of the type described above which is disposed between the output of said drive motor and said fixing means, so as to move the fastening means along the adjusting slide in response to rotation of the output.
  • the device can be used in any application whose system must transmit a torque or a rotation at the noise level and a vibration attenuation.
  • a device can for example be used for adjusting the height of an office or for the opening control of roofs of a motor vehicle.
  • Figure 1 is a partial longitudinal sectional view of a rotation transmission device, showing a bearing zone according to one embodiment of the invention.
  • Figure 2 is a perspective view of an adjustment system for the motor vehicle seat according to the invention.
  • a device for transmitting a rotational movement 1 comprises a flexible shaft (not represented) and a sheath 3.
  • the shaft is housed in the sheath 3.
  • the rotation speeds of the shaft are typically around 3000 rpm. To allow rotation at this speed, a game of a few tenths of a millimeter is provided between the shaft and the sheath 3.
  • the sheath 3 comprises a core 4 and an outer tubular casing 5 encasing the core 4.
  • the core 4 may for example be formed of a helical spring of metallic material. This spring is for example formed from a metal strip wound helically. The turns of the spring are non-contiguous which confers a flexibility to the sheath.
  • the outer shell 5 may be made of an extruded plastic material.
  • the sheath 3 presents a permanent deformation in the form of a bearing zone 6, the bearing extending in the longitudinal direction of the device.
  • the bearing zone comprises three parts, two outer parts 7 and 8, and a central part 9.
  • the axis of each of these parts is substantially parallel to that of the core 4.
  • the outer parts 7 and 8 are furthermore coaxial and their axis is offset from that of the core 4.
  • the axes are defined in the stable rectilinear position of the sheath, as shown in FIG. 1.
  • Each portion 7-9 further has an inner diameter substantially equal to the inner diameter of the core 4 and comprises an integer number of consecutive turns.
  • the bearing zone 6 of the transmission device 1 comprises two outer portions 7, 8 and a central portion 9 formed of a single turn.
  • the axes of each portion are offset relative to the axis of the core 4 so that the common axis of the outer portions 7, 8 and the axis of the central portion 9 are substantially symmetrical with respect to the axis of the soul 4.
  • the bearing zone 6 of the transmission device 1 comprises two outer portions 7, 8 formed of a single turn and a central portion 9 formed of two turns.
  • the central portion 9 is further coaxial with the core 4 of the sheath.
  • bearing zones can be distributed along the sheath.
  • the distance separating two zones is typically between 5 millimeters and 15 centimeters.
  • the zones are arranged continuously along the sheath.
  • the bearing zone 6 causes a misalignment of the metal turns of the sheath 3 without decreasing the inner diameter of said turns. This creates a slightly sinuous path inside the sheath 3.
  • the deformations of the sheath 3 are made by plastic deformation of the sheath, for example using a press whose jaws are arranged to radially offset the turns. These deformations are therefore permanent and the mounting of the device does not require any additional piece of maintenance of these deformations.
  • the sheath 3 comprises an inner tube 2 on its inner surface, that is to say the surface facing the shaft.
  • the inner tube 2 is disposed inside the core 4 and its outer diameter is substantially equal to the inner diameter of the core 4. That is to say that the inner tube 2 is disposed against the inner surface of the core 4
  • the inside diameter of the tube is arranged to allow rotation of the shaft inside the tube 2.
  • the tube 2 is deformed in the same manner as the core in the bearing zone or zones 6, that is to say that the tube 2 also has bearing zones in the same places as the bearing zones 6, as shown in FIG. FIG. 1.
  • points of contact are formed between the tube 2 and the shaft that are opposite to the axis of the sheath 3 and alternated on either side of this axis. These contact points eliminate any possibility of vibration of the moving shaft without braking it.
  • the motor torque can thus be similar to that used with undeformed sheaths and the sheath does not have a tendency to premature wear at the deformations.
  • the spaces left free between the tube 2 and the flexible shaft can form reserves of grease 21 for the lubrication of the shaft.
  • the tube 2 is for example made of plastic material, which avoids the metal-to-metal contacts.
  • the tube 2, not deformed, is introduced into the sheath 3 undeformed, then the deformation operation of the sheath 3 causes a similar deformation of the tube 2.
  • the sheath 3 is particularly simple to achieve.
  • the sheath is comprises a tube of plastic material on its inner surface has an optimal sound damping.
  • the tube 2 ensures mechanical isolation between the shaft and the sheath.
  • Such a rotational movement transmitting device can be used in a car seat adjustment system 20 as shown in FIG. 2.
  • two rails 11 and 12 are fixed by any suitable means on the structure not shown of a motor vehicle. These slides have setting notches whose function will be described below.
  • the slides 11 and 12 support the armature of a seat, also not shown, of the vehicle, the displacement and fixing relative to the slides are provided by gearboxes 13 and 14 respectively provided with toothed wheels cooperating with the aforementioned notches of the slides 11 and 12.
  • An electric motor 15 is attached to the vehicle structure or, alternatively, to the frame of the seat.
  • This motor 15 has two rotary outputs 16 and 17. These outputs 16 and 17 are connected by devices for transmitting a rotational movement 1 according to the invention to the reducers 13 and 14 respectively.
  • the bearing regions 6 of the transmission devices 1 are provided at locations of the sheath which are substantially straight during assembly in the adjustment system 20. In fact, it has been found that it is at such locations that the vibrations occur and spread in the most important way.
  • the motor 15 When the motor 15 is powered, it drives the shafts of transmission devices 1 in rotation inside their ducts. These shafts in turn drive the reducers 13 and 14 which has the effect of moving the seat along the slides 11 and 12.
  • the device 1 also finds applications in other areas and can be used as soon as a system has to transmit a remote cut or rotation with noise comfort and vibration attenuation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Flexible Shafts (AREA)
  • Seats For Vehicles (AREA)
  • Support Of The Bearing (AREA)

Abstract

The invention relates to a device for transmission of a rotational movement (1), comprisign a flexible shaft and a duct (3), said duct (3) having a bore (4), the bore (4) presenting at lest one zone forming a bearing (6), the zone (6) having at least three parts, two outer parts (7, 8) and one central part (9), said parts having axes essentially parallel to that of the bore (4) and having a diameter essentially the same as the bore (4), the outer parts (7, 8) being essentially coaxial with an offset axis with relation to the axes of the central part (9) and the bore (4), the device further comprising an internal tube (2) arranged within the bore (4), the tube (2) being shaped in the same manner as the bore (4) in the bearing region (6).

Description

DISPOSITIF DE TRANSMISSION D ' UN MOUVEMENT DE ROTATION AVEC UN ARBRE FLEXIBLE DANS UNE GAINE COMPORTANT DES ZONES FORMANT PALIER ET UN TUBE INTERNEDEVICE FOR TRANSMITTING A ROTATION MOVEMENT WITH A FLEXIBLE SHAFT IN A SHEATH COMPRISING BEARING-FORMING ZONES AND AN INTERNAL TUBE
L'invention concerne un dispositif de transmission d'un mouvement de rotation et un système de réglage pour siège de véhicule automobile comprenant un tel dispositif.The invention relates to a device for transmitting a rotational movement and an adjustment system for a motor vehicle seat comprising such a device.
On connaît des dispositifs de transmission de rotation qui comprennent un arbre flexible et une gaine à l'intérieure de laquelle est logé l'arbre.Rotational transmission devices are known which comprise a flexible shaft and a sheath inside which the shaft is housed.
Dans ces dispositifs de transmission, les vitesses de rotation de l'arbre dans la gaine sont supérieures à 2000 tours/minute, classiquement de l'ordre de 3000 tours/minute.In these transmission devices, the rotational speeds of the shaft in the sheath are greater than 2000 revolutions / minute, typically of the order of 3000 revolutions / minute.
Pour permettre une rotation à de telles vitesses, un jeu de quelques dixièmes de millimètre est nécessaire entre l'arbre et la gaine. Mais ce jeu entraîne, lors de la rotation, l'apparition de vibrations de faible amplitude qui se propagent le long de l'arbre et provoquent un bruit et une sensation au toucher désagréables.To allow rotation at such speeds, a game of a few tenths of a millimeter is required between the shaft and the sheath. But this game causes, during rotation, the appearance of low amplitude vibrations that propagate along the shaft and cause an unpleasant noise and feel.
Pour résoudre ce problème de vibrations, le document FR-1 563 195 propose un dispositif de transmission de rotation dont la gaine présente au moins une déformation sous la forme d'une zone formant palier qui est obtenue par déformation plastique de l'âme de la gaine, cette zone comprend au moins trois parties, deux parties extérieures et une partie centrale. Ces parties présentent des axes sensiblement parallèles à celui de l'âme et sont de diamètre sensiblement égal à celui de l'âme, les parties extérieures étant sensiblement coaxiales et d'axe décalé par rapport aux axes de la partie centrale et de l'âme. En effet, cette zone formant pallier, en créant des points de contact entre l'arbre et la gaine, permet de limiter les vibrations.To solve this vibration problem, FR-1 563 195 proposes a rotation transmission device whose sheath has at least one deformation in the form of a bearing zone which is obtained by plastic deformation of the core of the sheath, this zone comprises at least three parts, two outer parts and a central part. These parts have axes substantially parallel to that of the core and are of diameter substantially equal to that of the core, the outer portions being substantially coaxial and of axis offset from the axes of the central portion and the core. . Indeed, this zone forming a plateau, by creating points of contact between the shaft and the sheath, makes it possible to limit the vibrations.
Afin de réduire les frottements, ce document propose de réaliser un flocage de fibres sur la surface intérieure de l'âme de la gaine. Cependant, le flocage s'use avec une utilisation intensive du dispositif de transmission de rotation. En effet, l'arbre est réalisé par un enroulement de fils métalliques et présente une surface extérieure qui n'est pas lisse. Les fibres du flocage sont susceptibles de s'accrocher dans les aspérités de la surface extérieure de l'arbre et d'être arrachées lors de la rotation de l'arbre.In order to reduce friction, this document proposes to perform a flocking of fibers on the inner surface of the core of the sheath. However, the flocking wears with intensive use of the rotation transmission device. Indeed, the shaft is made by a winding of metal son and has an outer surface that is not smooth. The fibers of the flocking are likely to catch in the asperities of the outer surface of the shaft and be torn off during the rotation of the shaft.
L'invention vise à palier ces inconvénients en proposant un dispositif de transmission d'un mouvement de rotation dont la gaine présente des déformations permanentes qui sont agencées pour limiter les vibrations sans réduire le diamètre intérieur de la gaine et comprenant un tube interne présentant les mêmes déformations.The invention aims to overcome these drawbacks by proposing a device for transmitting a rotational movement whose sheath has permanent deformations which are arranged to limit the vibrations without reducing the inside diameter of the sheath and comprising an inner tube having the same deformations.
A cet effet et selon un premier aspect, l'invention concerne un dispositif de transmission d'un mouvement de rotation comprenant un arbre flexible et une gaine à l'intérieur de laquelle l'arbre est logé, ladite gaine comprenant une âme formée d'un cylindre creux dont le diamètre intérieur est agencé pour permettre la rotation dudit arbre à l'intérieur de ladite âme, l'âme comprenant au moins une zone formant palier qui est obtenue par déformation plastique, ladite zone comprenant au moins trois parties, deux parties extérieures et une partie centrale, lesdites parties présentant des axes sensiblement parallèles à celui de l'âme et étant de diamètre sensiblement égal à celui de l'âme, les parties extérieures étant sensiblement coaxiales et d'axe décalé par rapport aux axes de la partie centrale et de l'âme, ledit dispositif comprenant en outre un tube interne disposé à l'intérieur de l'âme et dont le diamètre extérieur est sensiblement égal au diamètre intérieur de l'âme et le diamètre intérieur est agencé pour permettre la rotation dudit arbre à l'intérieur dudit tube, le tube étant déformé de la même façon que l'âme dans la zone palier.For this purpose and according to a first aspect, the invention relates to a device for transmitting a rotational movement comprising a flexible shaft and a sheath inside which the shaft is housed, said sheath comprising a core formed of a hollow cylinder whose inner diameter is arranged to allow rotation of said shaft within said core, the core comprising at least one bearing zone which is obtained by plastic deformation, said zone comprising at least three parts, two parts and a central portion, said portions having axes substantially parallel to that of the core and being of diameter substantially equal to that of the core, the outer portions being substantially coaxial and of offset axis with respect to the axes of the portion and core, said device further comprising an inner tube disposed within the core and whose outer diameter is substantially equal to the diameter The interior of the core and the inner diameter are arranged to allow rotation of said shaft within said tube, the tube being deformed in the same manner as the core in the bearing zone.
La surface intérieure du tube est lisse et permet donc de limiter les frottements entre l'arbre et Ia gaine. Le tube est réalisé en matériau plastique, ce qui évite les contacts de métaux entre eux, réduisant ainsi les bruits et l'usure des matériaux. Selon une réalisation, la partie centrale de la zone formant palier et l'âme de la gaine sont sensiblement coaxiales.The inner surface of the tube is smooth and thus allows to limit the friction between the shaft and the sheath. The tube is made of plastic material, which prevents metal contacts between them, reducing noise and wear of materials. In one embodiment, the central portion of the bearing zone and the core of the sheath are substantially coaxial.
Selon une réalisation, la gaine comprend plusieurs zones formant palier espacées les unes des autres d'une distance comprise entre 5 et 15 centimètres. Selon une autre réalisation, les zones sont disposées continûment le long de la gaine.In one embodiment, the sheath comprises a plurality of bearing zones spaced from one another by a distance of between 5 and 15 centimeters. In another embodiment, the zones are arranged continuously along the sheath.
Selon une réalisation, le tube interne non déformé est introduit dans l'âme non déformée, puis les déformations créant les zones formant palier sont réalisées simultanément sur l'âme et sur le tube interne.According to one embodiment, the undistorted inner tube is introduced into the undeformed core, and then the deformations creating the bearing regions are carried out simultaneously on the core and on the inner tube.
Selon un deuxième aspect, l'invention concerne un système de réglage pour siège de véhicule automobile, comprenant au moins une glissière de réglage montée sur la structure du véhicule et des moyens réglables de fixation du siège sur la glissière, le système comprenant en outre un moteur d'entraînement disposant d'au moins une sortie tournante. Le système comprend en outre un dispositif de transmission d'un mouvement de rotation du type décrit ci-dessus qui est disposé entre la sortie dudit moteur d'entraînement et lesdits moyens de fixation, de sorte à déplacer les moyens de fixation le long de la glissière de réglage en réponse à une rotation de la sortie.According to a second aspect, the invention relates to an adjustment system for a motor vehicle seat, comprising at least one adjustment slide mounted on the structure of the vehicle and adjustable means for fixing the seat on the slide, the system further comprising a driving motor having at least one rotating output. The system further comprises a rotational movement transmitting device of the type described above which is disposed between the output of said drive motor and said fixing means, so as to move the fastening means along the adjusting slide in response to rotation of the output.
L'invention ne se limite pas à une telle application. En effet, le dispositif peut être utilisé dans toute application dont le système doit transmettre un couple ou une rotation au niveau bruit et une atténuation de vibrations. Un tel dispositif peut par exemple être utilisé pour le réglage de la hauteur d'un bureau ou pour la commande d'ouverture de toits d'un véhicule automobile.The invention is not limited to such an application. Indeed, the device can be used in any application whose system must transmit a torque or a rotation at the noise level and a vibration attenuation. Such a device can for example be used for adjusting the height of an office or for the opening control of roofs of a motor vehicle.
L'invention sera bien comprise à la lecture de la description qui suit, faite en référence aux figures annexées. La figure 1 est une vue partielle en coupe longitudinale d'un dispositif de transmission de rotation, montrant une zone formant palier selon un mode de réalisation de l'invention.The invention will be better understood on reading the description which follows, made with reference to the appended figures. Figure 1 is a partial longitudinal sectional view of a rotation transmission device, showing a bearing zone according to one embodiment of the invention.
La figure 2 est une vue en perspective d'un système de réglage pour le siège de véhicule automobile selon l'invention.Figure 2 is a perspective view of an adjustment system for the motor vehicle seat according to the invention.
Un dispositif de transmission d'un mouvement de rotation 1 comprend un arbre flexible (non représenté) et une gaine 3. L'arbre est logé dans la gaine 3.A device for transmitting a rotational movement 1 comprises a flexible shaft (not represented) and a sheath 3. The shaft is housed in the sheath 3.
Les vitesses de rotation de l'arbre sont classiquement d'environ 3000 tours/minute. Pour permettre une rotation à cette vitesse, un jeu de quelques dixièmes de millimètre est prévu entre l'arbre et la gaine 3.The rotation speeds of the shaft are typically around 3000 rpm. To allow rotation at this speed, a game of a few tenths of a millimeter is provided between the shaft and the sheath 3.
La gaine 3 comprend une âme 4 et une enveloppe tubulaire extérieure 5 enrobant l'âme 4. L'âme 4 peut par exemple être formée d'un ressort hélicoïdal en matériau métallique. Ce ressort est par exemple formé à partir d'une bande métallique enroulée en hélice. Les spires du ressort sont non-jointive ce qui confère une flexibilité à la gaine. L'enveloppe extérieure 5 peut être réalisée en une matière plastique extrudée.The sheath 3 comprises a core 4 and an outer tubular casing 5 encasing the core 4. The core 4 may for example be formed of a helical spring of metallic material. This spring is for example formed from a metal strip wound helically. The turns of the spring are non-contiguous which confers a flexibility to the sheath. The outer shell 5 may be made of an extruded plastic material.
En se référant à la figure 1 , la gaine 3 présente une déformation permanente sous la forme d'une zone formant palier 6, le palier s'étendant dans la direction longitudinale du dispositif.With reference to FIG. 1, the sheath 3 presents a permanent deformation in the form of a bearing zone 6, the bearing extending in the longitudinal direction of the device.
La zone formant palier comprend trois parties, deux parties extérieures 7 et 8, et une partie centrale 9. L'axe de chacune de ces parties est sensiblement parallèle à celui de l'âme 4. Les parties extérieures 7 et 8 sont en outre coaxiales et leur axe est décalé par rapport à celui de l'âme 4. Dans la description, les axes sont définis dans la position rectiligne stable de la gaine, tel que représenté sur la figure 1. Chaque partie 7-9 présente de plus un diamètre intérieur sensiblement égal au diamètre intérieur de l'âme 4 et comprend un nombre entier de spires consécutives.The bearing zone comprises three parts, two outer parts 7 and 8, and a central part 9. The axis of each of these parts is substantially parallel to that of the core 4. The outer parts 7 and 8 are furthermore coaxial and their axis is offset from that of the core 4. In the description, the axes are defined in the stable rectilinear position of the sheath, as shown in FIG. 1. Each portion 7-9 further has an inner diameter substantially equal to the inner diameter of the core 4 and comprises an integer number of consecutive turns.
Selon le mode de réalisation de l'invention représenté sur la figure 1, la zone formant palier 6 du dispositif de transmission 1 comprend deux parties extérieures 7, 8 et une partie centrale 9 formées d'une seule spire. Les axes de chaque partie sont décalés par rapport à l'axe de l'âme 4 de telle sorte que l'axe commun des parties extérieures 7, 8 et l'axe de la partie centrale 9 sont sensiblement symétriques par rapport à l'axe de l'âme 4.According to the embodiment of the invention shown in Figure 1, the bearing zone 6 of the transmission device 1 comprises two outer portions 7, 8 and a central portion 9 formed of a single turn. The axes of each portion are offset relative to the axis of the core 4 so that the common axis of the outer portions 7, 8 and the axis of the central portion 9 are substantially symmetrical with respect to the axis of the soul 4.
Selon un autre mode de réalisation de l'invention, la zone formant palier 6 du dispositif de transmission 1 comprend deux parties extérieures 7, 8 formées d'une seule spire et une partie centrale 9 formée de deux spires. La partie centrale 9 est en outre coaxiale avec l'âme 4 de la gaine.According to another embodiment of the invention, the bearing zone 6 of the transmission device 1 comprises two outer portions 7, 8 formed of a single turn and a central portion 9 formed of two turns. The central portion 9 is further coaxial with the core 4 of the sheath.
Selon l'invention, plusieurs zones formant palier peuvent être réparties le long de la gaine. Dans une réalisation, la distance séparant deux zones est typiquement comprise entre 5 millimètres et 15 centimètres. Selon une autre réalisation, les zones sont disposées continûment le long de la gaine.According to the invention, several bearing zones can be distributed along the sheath. In one embodiment, the distance separating two zones is typically between 5 millimeters and 15 centimeters. In another embodiment, the zones are arranged continuously along the sheath.
La zone formant palier 6 entraîne un désaxage des spires métalliques de la gaine 3 sans diminution du diamètre intérieur desdites spires. Ceci crée un cheminement légèrement sinueux à l'intérieur de la gaine 3.The bearing zone 6 causes a misalignment of the metal turns of the sheath 3 without decreasing the inner diameter of said turns. This creates a slightly sinuous path inside the sheath 3.
Les déformations de la gaine 3 sont réalisées par déformation plastique de la gaine, par exemple à l'aide d'une presse dont les mors sont agencés pour décaler radialement les spires. Ces déformations sont donc permanentes et le montage du dispositif ne nécessite aucune pièce supplémentaire de maintien de ces déformations.The deformations of the sheath 3 are made by plastic deformation of the sheath, for example using a press whose jaws are arranged to radially offset the turns. These deformations are therefore permanent and the mounting of the device does not require any additional piece of maintenance of these deformations.
En se référant à la figure 1 , la gaine 3 comprend un tube interne 2 sur sa surface intérieure, c'est à dire la surface en regard de l'arbre. Le tube interne 2 est disposé à l'intérieur de l'âme 4 et son diamètre extérieur est sensiblement égal au diamètre intérieur de l'âme 4. C'est-à-dire que le tube interne 2 est disposé contre la surface interne de l'âme 4. Le diamètre intérieur du tube est agencé pour permettre la rotation de l'arbre à l'intérieur du tube 2.Referring to Figure 1, the sheath 3 comprises an inner tube 2 on its inner surface, that is to say the surface facing the shaft. The inner tube 2 is disposed inside the core 4 and its outer diameter is substantially equal to the inner diameter of the core 4. That is to say that the inner tube 2 is disposed against the inner surface of the core 4 The inside diameter of the tube is arranged to allow rotation of the shaft inside the tube 2.
Le tube 2 est déformé de la même manière que l'âme dans la ou les zones palier 6, c'est-à-dire que le tube 2 présente également des zones palier au mêmes endroits que les zones palier 6, comme représenté sur la figure 1. On forme ainsi des points de contact entre le tube 2 et l'arbre qui sont opposés par rapport à l'axe de la gaine 3 et alternés de part et d'autre de cet axe. Ces points de contact éliminent toute possibilité de mise en vibration de l'arbre en mouvement sans pour autant freiner celui-ci. Le couple du moteur peut ainsi être analogue à celui utilisé avec des gaines non déformées et la gaine ne présente pas une tendance à l'usure prématurée au niveau des déformations. D'autre part, les espaces laissés libres entre le tube 2 et l'arbre flexible peuvent former des réserves de graisse 21 pour la lubrification de l'arbre.The tube 2 is deformed in the same manner as the core in the bearing zone or zones 6, that is to say that the tube 2 also has bearing zones in the same places as the bearing zones 6, as shown in FIG. FIG. 1. Thus, points of contact are formed between the tube 2 and the shaft that are opposite to the axis of the sheath 3 and alternated on either side of this axis. These contact points eliminate any possibility of vibration of the moving shaft without braking it. The motor torque can thus be similar to that used with undeformed sheaths and the sheath does not have a tendency to premature wear at the deformations. On the other hand, the spaces left free between the tube 2 and the flexible shaft can form reserves of grease 21 for the lubrication of the shaft.
Le tube 2 est par exemple réalisé en matériau plastique, ce qui évite les contacts métal contre métal. Le tube 2, non déformé, est introduit dans la gaine 3 non déformée, puis l'opération de déformation de la gaine 3 entraîne une déformation analogue du tube 2. La gaine 3 est donc particulièrement simple à réaliser.The tube 2 is for example made of plastic material, which avoids the metal-to-metal contacts. The tube 2, not deformed, is introduced into the sheath 3 undeformed, then the deformation operation of the sheath 3 causes a similar deformation of the tube 2. The sheath 3 is particularly simple to achieve.
En effet, on a pu observer qu'un tel agencement dans lequel la gaine est comprend un tube en matériau plastique sur sa surface interne présentait un amortissement sonore optimal. Le tube 2 permet d'assurer un isolement mécanique entre l'arbre et la gaine.Indeed, it has been observed that such an arrangement in which the sheath is comprises a tube of plastic material on its inner surface has an optimal sound damping. The tube 2 ensures mechanical isolation between the shaft and the sheath.
Un tel dispositif de transmission de mouvement de rotation peut être utilisé dans un système de réglage de siège automobile 20 tel que représenté à la figure 2. A cet effet, deux glissières 11 et 12 sont fixées par tout moyens convenables sur la structure non représentée d'un véhicule automobile. Ces glissières présentent des crans de réglage dont la fonction sera décrite ci-après.Such a rotational movement transmitting device can be used in a car seat adjustment system 20 as shown in FIG. 2. For this purpose, two rails 11 and 12 are fixed by any suitable means on the structure not shown of a motor vehicle. These slides have setting notches whose function will be described below.
Les glissières 11 et 12 supportent l'armature d'un siège, également non représentée, du véhicule, dont le déplacement et la fixation par rapport aux glissières sont assurés par des réducteurs 13 et 14 respectivement munis de roues dentées coopérant avec les crans précités des glissières 11 et 12.The slides 11 and 12 support the armature of a seat, also not shown, of the vehicle, the displacement and fixing relative to the slides are provided by gearboxes 13 and 14 respectively provided with toothed wheels cooperating with the aforementioned notches of the slides 11 and 12.
Un moteur électrique 15 est fixé à la structure du véhicule ou, en variante, à l'armature du siège. Ce moteur 15 possède deux sorties tournantes 16 et 17. Ces sorties 16 et 17 sont reliées par des dispositifs de transmission d'un mouvement de rotation 1 selon l'invention aux réducteurs 13 et 14 respectivement.An electric motor 15 is attached to the vehicle structure or, alternatively, to the frame of the seat. This motor 15 has two rotary outputs 16 and 17. These outputs 16 and 17 are connected by devices for transmitting a rotational movement 1 according to the invention to the reducers 13 and 14 respectively.
Les zones formant palier 6 des dispositifs de transmission 1 sont prévues à des emplacements de la gaine qui sont sensiblement rectilignes lors du montage dans le système de réglage 20. En effet, il a été constaté que c'est à de tels emplacement que les vibrations se produisent et se propagent de façon la plus importante.The bearing regions 6 of the transmission devices 1 are provided at locations of the sheath which are substantially straight during assembly in the adjustment system 20. In fact, it has been found that it is at such locations that the vibrations occur and spread in the most important way.
Lorsque le moteur 15 est alimenté, il entraîne les arbres des dispositifs de transmission 1 en rotation à l'intérieur de leurs gaines. Ces arbres entraînent à leur tour les réducteurs 13 et 14 ce qui a pour effet de déplacer le siège le long des glissières 11 et 12.When the motor 15 is powered, it drives the shafts of transmission devices 1 in rotation inside their ducts. These shafts in turn drive the reducers 13 and 14 which has the effect of moving the seat along the slides 11 and 12.
Comme indiqué précédemment, le dispositif 1 trouve également des applications dans d'autres domaines et peut être utilisé dès qu'un système doit transmettre un coupe ou une rotation à distance avec un confort au niveau bruit et une atténuation des vibrations. As previously indicated, the device 1 also finds applications in other areas and can be used as soon as a system has to transmit a remote cut or rotation with noise comfort and vibration attenuation.

Claims

REVENDICATIONS
1. Dispositif de transmission d'un mouvement de rotation (1) comprenant un arbre flexible et une gaine (3) à l'intérieur de laquelle l'arbre est logé, ladite gaine (3) comprenant une âme (4) formée d'un cylindre, l'âme (4) comprenant au moins une zone formant palier (6) qui est obtenue par déformation plastique, ladite zone (6) comprenant au moins trois parties, deux parties extérieures (7, 8) et une partie centrale (9), lesdites parties présentant des axes sensiblement parallèles à celui de l'âme (4) et étant de diamètre sensiblement égal à celui de l'âme (4), les parties extérieures (7,1. A device for transmitting a rotational movement (1) comprising a flexible shaft and a sheath (3) inside which the shaft is housed, said sheath (3) comprising a core (4) formed of a cylinder, the core (4) comprising at least one bearing zone (6) which is obtained by plastic deformation, said zone (6) comprising at least three parts, two outer parts (7, 8) and one central part ( 9), said parts having axes substantially parallel to that of the core (4) and being of diameter substantially equal to that of the core (4), the outer parts (7,
8) étant sensiblement coaxiales et d'axe décalé par rapport aux axes de la partie centrale (9) et de l'âme (4), ledit dispositif étant caractérisé en ce qu'il comprend en outre un tube interne (2) disposé à l'intérieur de l'âme (4) et dont le diamètre extérieur est sensiblement égal au diamètre intérieur de l'âme (4) et le diamètre intérieur est agencé pour permettre la rotation dudit arbre à l'intérieur dudit tube, le tube (2) étant déformé de la même façon que l'âme (4) dans la zone palier (6).8) being substantially coaxial and of axis offset from the axes of the central portion (9) and the core (4), said device being characterized in that it further comprises an inner tube (2) disposed at the interior of the core (4) and whose outer diameter is substantially equal to the inner diameter of the core (4) and the inner diameter is arranged to allow the rotation of said shaft inside said tube, the tube ( 2) being deformed in the same way as the core (4) in the bearing zone (6).
2. Dispositif de transmission (1) selon la revendication 1 , caractérisé en ce que la partie centrale (9) de la zone formant palier (6) et l'âme (4) de la gaine (3) sont sensiblement coaxiales.2. Transmission device (1) according to claim 1, characterized in that the central portion (9) of the bearing zone (6) and the core (4) of the sheath (3) are substantially coaxial.
3. Dispositif de transmission (1) selon la revendication 1 ou 2, caractérisé en ce que l'âme (4) de la gaine (3) est formée d'un ressort hélicoïdal en matériau métallique.3. Transmission device (1) according to claim 1 or 2, characterized in that the core (4) of the sheath (3) is formed of a helical spring metal material.
4. Dispositif de transmission (1) selon la revendication 3, caractérisé en ce que chaque partie (7, 8, 9) de la zone formant palier (6) comprend un nombre entier de spires du ressort hélicoïdal.4. Transmission device (1) according to claim 3, characterized in that each portion (7, 8, 9) of the bearing zone (6) comprises an integer number of turns of the coil spring.
5. Dispositif de transmission (1) selon l'une des revendications 3 ou 4, caractérisé en ce que les spires de chaque partie (7, 8, 9) de la zone formant palier (6) sont consécutives. 5. Transmission device (1) according to one of claims 3 or 4, characterized in that the turns of each portion (7, 8, 9) of the bearing zone (6) are consecutive.
6. Dispositif de transmission (1) selon l'une des revendications 3 à 5, caractérisé en ce que les parties extérieures (7, 8) de la zone formant palier (6) comprennent chacune une spire et en ce que la partie centrale (9) comprend deux spires.Transmission device (1) according to one of Claims 3 to 5, characterized in that the outer parts (7, 8) of the bearing zone (6) each comprise a turn and in that the central part ( 9) comprises two turns.
7. Dispositif de transmission (1) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la gaine (3) comprend plusieurs zones formant palier (6), lesdites zones étant espacées les unes des autres d'une distance comprise entre 5 et 10 centimètres.7. Transmission device (1) according to any one of claims 1 to 6, characterized in that the sheath (3) comprises a plurality of bearing regions (6), said zones being spaced from each other by a distance of between 5 and 10 centimeters.
8. Dispositif de transmission (1) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la gaine (3) comprend plusieurs zones formant palier (6), lesdites zones étant disposées continûment le long de la gaine.8. Transmission device (1) according to any one of claims 1 to 6, characterized in that the sheath (3) comprises a plurality of bearing regions (6), said zones being arranged continuously along the sheath.
9. Dispositif de transmission (1) selon l'une quelconque des revendications 1 àTransmission device (1) according to any one of claims 1 to
8, caractérisé en ce que la gaine (3) dudit dispositif (1) comprend en outre une enveloppe tubulaire extérieure (5) en matière plastique qui enrobe l'âme (4).8, characterized in that the sheath (3) of said device (1) further comprises an outer tubular casing (5) of plastic material which coats the core (4).
10. Dispositif de transmission (1) selon l'une quelconque des revendications 1 àTransmission device (1) according to one of claims 1 to
9, caractérisé en ce que le tube interne (2) est réalisé en matériau plastique et en ce qu'il est déformé simultanément à l'âme (4) pour former la zone formant palier (6).9, characterized in that the inner tube (2) is made of plastic material and in that it is simultaneously deformed to the core (4) to form the bearing zone (6).
11. Système de réglage pour siège de véhicule automobile (20), comprenant au moins une glissière de réglage (11, 12) montée sur la structure du véhicule et des moyens réglables (13, 14) de fixation du siège sur ladite glissière (11 , 12), ledit système comprenant en outre un moteur d'entraînement (15) disposant d'au moins une sortie tournante (16, 17), ledit système de réglage (20) étant caractérisé en ce qu'il comprend en outre un dispositif de transmission (1) selon l'une quelconque des revendications 1 à 10, qui est disposé entre la sortie (16, 17) dudit moteur d'entraînement (15) et lesdits moyens de fixation (13, 14), de sorte à déplacer lesdits moyens de fixation (13, 14) le long de ladite glissière de réglage (11 , 12) en réponse à une rotation de ladite sortie (16, 17).An adjusting system for a motor vehicle seat (20), comprising at least one adjustment slide (11, 12) mounted on the vehicle structure and adjustable means (13, 14) for attaching the seat to said slide (11). 12), said system further comprising a drive motor (15) having at least one rotary output (16, 17), said adjustment system (20) being characterized in that it further comprises a device transmission device (1) according to any one of claims 1 to 10, which is disposed between the output (16, 17) of said drive motor (15) and said fastening means (13, 14) for moving said fastening means (13, 14) along said adjustment slide (11, 12) in response to a rotation of said exit (16, 17).
12. Système de réglage (20) selon la revendication 11 , caractérisé en ce que les zones formant palier (6) sont prévues à des emplacements de la gaine (3) qui sont sensiblement rectilignes. 12. Adjustment system (20) according to claim 11, characterized in that the bearing regions (6) are provided at locations of the sheath (3) which are substantially rectilinear.
EP06794196A 2005-07-22 2006-07-21 Transmission device for a rotational movement with a flexible shaft in a duct comprising zones forming a bearing and an internal tube Withdrawn EP1957809A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0552269A FR2888901B1 (en) 2005-07-22 2005-07-22 DEVICE FOR TRANSMITTING ROTATIONAL MOVEMENT COMPRISING ZONES FORMING BEARING AND INTERNAL TUBE
PCT/FR2006/001791 WO2007010147A1 (en) 2005-07-22 2006-07-21 Transmission device for a rotational movement with a flexible shaft in a duct comprising zones forming a bearing and an internal tube

Publications (1)

Publication Number Publication Date
EP1957809A1 true EP1957809A1 (en) 2008-08-20

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EP06794196A Withdrawn EP1957809A1 (en) 2005-07-22 2006-07-21 Transmission device for a rotational movement with a flexible shaft in a duct comprising zones forming a bearing and an internal tube

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US (1) US20090102262A1 (en)
EP (1) EP1957809A1 (en)
JP (1) JP2009503371A (en)
FR (1) FR2888901B1 (en)
WO (1) WO2007010147A1 (en)

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WO2007010147A1 (en) 2007-01-25
US20090102262A1 (en) 2009-04-23
FR2888901A1 (en) 2007-01-26
WO2007010147A8 (en) 2008-06-26
JP2009503371A (en) 2009-01-29
FR2888901B1 (en) 2007-09-28

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