EP2367701A1 - Device for pressurising a fluid, to be directly mounted on a power takeoff - Google Patents

Device for pressurising a fluid, to be directly mounted on a power takeoff

Info

Publication number
EP2367701A1
EP2367701A1 EP08875637A EP08875637A EP2367701A1 EP 2367701 A1 EP2367701 A1 EP 2367701A1 EP 08875637 A EP08875637 A EP 08875637A EP 08875637 A EP08875637 A EP 08875637A EP 2367701 A1 EP2367701 A1 EP 2367701A1
Authority
EP
European Patent Office
Prior art keywords
power take
shaft
rotation
fluid
multiplication stage
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Withdrawn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
EP08875637A
Other languages
German (de)
French (fr)
Inventor
Fabrice Bariau
Christian Dietsch
Guy Delaisse
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.)
Mouvex SAS
Original Assignee
Mouvex SAS
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 Mouvex SAS filed Critical Mouvex SAS
Publication of EP2367701A1 publication Critical patent/EP2367701A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/02—Arrangements for drive of co-operating members, e.g. for rotary piston and casing of toothed-gearing type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a device for pressurizing a fluid, intended to be attached to a power take-off of a motor vehicle and a system comprising a power take-off and such a device for pressurizing.
  • the invention particularly relates to compressors and pumps connected to a power take-off of a motor vehicle.
  • the power take-offs are generally fixed on a gearbox and take their rotational movement on one of the gears of said gearbox.
  • the power take-offs include an output sleeve for transmitting motion to a drive shaft and commonly a control clutch, separate from the main clutch of the vehicle, for connecting or disconnecting the gearbox to the output of the transmission. the power take-off.
  • the power take-offs may further include a speed multiplication between the input speed and the output speed. The ratios of reduction or multiplication are commonly between 0.5 and 2.
  • the pressurizing devices comprise at least one frame and one or two shafts, movable in rotation, carrying a member ensuring the setting under fluid pressure, pump or compressor.
  • the frame of the pressurizing devices is mounted on the chassis of the vehicle and a cardan shaft, connected on the one hand to the power take-off and on the other hand to the pressurizing device, transmits the movement of the power take-off to the pressurizing device.
  • the output speed of the power take-off is insufficient to drive the compression gear at the right speed.
  • a multiplier is integrated into the compressor. Indeed, the speed of rotation at the output of a power take-off can reach only about 2000 rpm while the speed required for the proper operation of a screw compressor is greater than 10,000 revolutions / minute.
  • the pressurizing devices comprise a safety member for limiting the torque transmitted between the power take-off and the movable member ensuring the pressurization of a fluid. Indeed, in case of blockage of the compressor or the pump, it is necessary to limit the torque transmitted to prevent the rupture of the transmission members.
  • the devices of the prior art have a large size, because of the presence of a multiplier and a device for limiting the torque, so that the integration of these devices to a motor vehicle is not satisfactory.
  • the installation of these devices is complex because they must be previously attached to the chassis of the vehicle, and then connected to the power take-off by the cardan shaft.
  • the direction of rotation at the output of the gearboxes and therefore the output of the power take-offs can be hourly or counterclockwise.
  • the devices for pressurizing a fluid are adapted in series to one or the other of the directions of rotation, or a reverser of direction of rotation is arranged between the power take-off and the device.
  • the first solution requires manufacturers to provide two different references of devices while the second solution increases the size and complexity of the system.
  • the invention aims to remedy these problems by proposing a device for pressurizing a fluid intended to be associated with a rotary power take-off, which is reliable and whose size and integration on the vehicle automobile are satisfactory.
  • the invention provides a device for pressurizing a fluid, intended to be associated with a rotary power take-off of a motor vehicle comprising a housing and at least one multiplication stage, said device comprising a frame supporting at least a first movable rotating shaft carrying a member for the setting in motion of the fluid and dynamic coupling means of the shaft to the power take-off.
  • the frame comprises support means and fixing to the casing of the power take-off and in that said coupling means are arranged to directly connect the movable shaft to the multiplication stage of the socket. of movement.
  • the dynamic coupling means directly connect the movable shaft, carrying the fluid moving member, to the power take-off.
  • the pressurizing device therefore does not include a multiplier because it is offset in the casing of the power take-off.
  • the load related to the multiplier is close to closer to the junction between the power take-off and the gearbox so that the device, thus formed, is more compact, lighter and the system consists of the device and
  • the power take-off thus becomes compatible with the allowable loadings at the junction between the power take-off and the gearbox.
  • the coupling means comprises a single transmission element between the stage of multiplication and the movable tree.
  • the device therefore does not include a multiplication stage, other than that of the power take-off.
  • the coupling means comprise a pinion carried by the first movable shaft.
  • This coupling means allows direct cooperation with the output gear of the power take-off. The drive of these gears allows a multiplication of the speed of rotation.
  • the fastening means comprise a peripheral fastening flange, intended to be arranged against the casing of the power take-off.
  • the fixing flange comprises a cradle-shaped portion so as to allow passage of the multiplication stage of the power take-off.
  • the fixing means comprise centering and positioning means. These means make it possible to ensure precise dynamic coupling between the device and the power take-off.
  • the transfer device comprises an internal lubrication circuit and means for connecting the internal circuit to the lubrication circuit of the motor vehicle.
  • the rotating members of the device may require forced lubrication.
  • the invention meets this need by providing a lubrication circuit capable of being connected to a lubrication circuit of the motor vehicle comprising pumping means and arranged, for example, in the casing of the power take-off.
  • pumping means capable of being connected to a lubrication circuit of the motor vehicle comprising pumping means and arranged, for example, in the casing of the power take-off.
  • connection means comprise a supply orifice extending in the axis of rotation C of the multiplication stage of the power take-off so as to allow a supply of the lubricant by the shaft. supporting said multiplication stage.
  • the internal lubrication circuit includes a filter.
  • the invention relates to a device for pressurizing a fluid, intended to be associated with a rotary power take-off of a motor vehicle comprising a housing, said device comprising a frame, a first and a second rotating shafts each carrying a member for moving the fluid, means for synchronizing the rotation of the first and second shafts arranged to drive the first shaft in a first direction of rotation and the second shaft in a second direction. direction of rotation in a suitable gear ratio; and means for dynamically coupling the first or second shaft to the power take-off.
  • said coupling means comprise a removable pinion adapted to be mounted either on the first or on the second shaft, depending on the direction of rotation of said power take-off, so as to cause the first shaft in the first direction of rotation and the second shaft in the second direction of rotation and that regardless of the direction of rotation of said power take-off.
  • the device according to the second aspect of the invention is adaptable to different gearboxes and market power take-off.
  • this adaptation is simple and does not require an additional adapter that would increase the weight and size of the device, so that this solution is particularly interesting when the frame of the device is fixed and supported by the casing of the power take-off .
  • the synchronization means advantageously have a multiplication ratio of the order of 1.2.
  • the invention relates to a system comprising a rotary power take-off comprising a casing and a device for pressurizing a fluid according to the first and / or second aspect of the invention, associated with said casing.
  • FIG. 1a is a perspective view of a pressurizing device according to the invention, cooperating with a transmission pinion of the movement belonging to the power take-off;
  • FIG. 1b is a perspective view of a system comprising a pressurizing device and a power take-off, the housing is intended to be fixed on a gearbox;
  • FIG. 2 is a detailed perspective view of the pressurizing device of FIG. 1a;
  • - Figure 3 is a front view of a device according to the invention illustrating the support means and fixing to the housing;
  • FIG. 4 is a perspective view of a device according to the invention comprising centering and positioning means according to a second embodiment
  • FIG. 5 is a perspective view of a device according to the invention, illustrating the connection means of the internal lubrication circuit to a lubrication circuit of the motor vehicle;
  • FIG. 6 is a view of the device of Figure 5, in section along the plane VI-Vl;
  • FIG. 7 is a view of the device of Figure 5, in section along the plane VII-VII;
  • FIG. 8 is a cross-sectional view of the device of FIG. 5;
  • FIG. 9 illustrates a system according to the invention comprising a power take-off and a pressurizing device, mounted on a gearbox;
  • FIG. 10 illustrates a device according to a second embodiment of the invention.
  • the device for pressurizing a fluid shown in FIGS. 1 to 11 is a screw compressor 1.
  • the compressor 1 is intended to be associated with a power take-off 2 of a motor vehicle, shown in Figures 1b and 10.
  • the power take-off 2 comprises a housing 3 which is intended to be fixed on the box 17 of a motor vehicle, shown in Figure 10.
  • the power take-off cooperates with an output shaft of the gearbox 17.
  • the casing 3 comprises fixing means on the gearbox 17 of the motor vehicle.
  • the PTO 2 is equipped with a torque limiting device transmitted, not shown. This device makes it possible to protect the transmission members in the event of blockage of a mobile shaft of the device 1.
  • the PTO 2 comprises, at the output, a pinion 4, illustrated in Figures 1a and 2, and constituting a multiplication stage.
  • the pressurizing device comprises a frame 5 which is intended to be associated with the casing 3 of the power take-off 2.
  • the pressurizing device 1 comprises, in the embodiment shown, two shafts 6a, 6b rotatable on the frame 5, respectively about a first axis A and a second axis B , parallel.
  • Each of the shafts 6a, 6b carries a compression screw, not shown, extending in a compression chamber of the device 1.
  • the device 1 comprises a feed orifice and a fluid outlet orifice communicating with the compression chamber.
  • the two screws have complementary profiles and are nested one inside the other, but do not come into contact with each other.
  • One screw called female
  • the other named male
  • the first screw rotates in a first direction of rotation while the second screw rotates in a second direction of rotation.
  • the female screw has 6 concave profiled lobes while the male screw has 5 convex profiled lobes. Due to the number of different lobes, the relative speeds are in a ratio of 5/6 or 6/5 depending on the screw taken as a reference. The rotations of the screws are synchronized.
  • the shafts 6a, 6b each carry a gear wheel 11a, 11b cooperating with each other.
  • the two gear wheels 11a, 11b form means for synchronizing the rotation of the shafts 6a, 6b for driving said shafts in directions of inverted rotation.
  • the synchronization means will be adapted to respect the rotational speed ratios between the screws. Note that we can use any equivalent means to achieve the rotation speed synchronization function.
  • one of the shafts 11a, 11b supports a pinion 7 forming a coupling means with the output gear 4 of the power take-off 2.
  • the movable shafts 6a, 6b are capable of being driven at high rotational speeds of the order of 10 000 to 20 000 revolutions per minute for example.
  • the pinion 7 is removable and is adapted to be mounted alternately on one end of the first 6a or the second shaft 6b.
  • This embodiment makes it possible to adapt the pressurizing device 1 to the different gearboxes on the market.
  • the output shafts of the gearboxes 17 of the market can indifferently be driven in rotation in the clockwise direction or in the counterclockwise direction.
  • the device 1 for pressurizing adapts to the different types of gearbox 17 and existing power take-off.
  • the pinion 7 will be placed on the first 6a or the second shaft 6b, depending on the direction of rotation of the power take-off 2.
  • the first shaft 6a in the first direction of rotation and the second shaft 6b in the second direction of rotation.
  • the axes of the two shafts 6a, 6b are placed at an equal distance from the axis of rotation C of the output pinion 4, to allow the drive of one or the other of the shafts.
  • the shafts 6a, 6b have receiving ends of the pinion 7, identical and adapted to receive the bore central pinion 7.
  • the central bore of the pinion 7 comprises longitudinal grooves 15 engaging in longitudinal grooves 16 of the shafts 6a, 6b.
  • the shaft 6a, 6b which does not support the pinion 7 supports a removable spacer 14 of protection.
  • the bores of the pinion 7 and the spacer 14 are identical.
  • the spacer 14 obviously has an outside diameter smaller than the diameter of the pinion 7, so that when the device is associated with the power take-off, the spacer 14 does not come into contact with the output pinion 4 of the take-off. movement 2.
  • the rotational speeds at the output of the gearboxes 17 are different, of construction.
  • this difference in speed is commonly related to the direction of rotation, clockwise or anticlockwise, at the output of the gearbox 17. Therefore, in order to allow optimal operation of the device regardless of the type of gearbox. speed 17 used, it can be provided that the rotational speeds of each screw is identical, in operation and that the gear ratio between the screws is substantially identical to the rotational speed ratio between the boxes whose output is driven in the direction and the boxes whose output is drawn counterclockwise.
  • the ratio of output speeds between the two types of box is of the order of 1, 15
  • the gear wheels 11a, 11b thus have sizes and numbers of teeth adapted to the ratio 6/5 lobes of male and female screws.
  • This ratio of 1, 2 is cleverly used in relation to ratio 1, 15 of the box types to maintain the speed of the drive motor at the most suitable speed between about 1200 rotations per minute and about 1400 rotations per minute.
  • the frame 5 comprises fixing means to the casing 3 of the power take-off 2. These means are able to support and support the device 1 for putting under pressure.
  • the pressurizing device 1 is fixed and supported only by means of these means and is not directly fixed by other means to the chassis of the vehicle.
  • the frame 5 can therefore be considered as self-supporting.
  • the support and fixing means comprise a peripheral fastening flange 8 which is adapted to cooperate with the casing 3 of the power take-off 2, via a suitable fastening flange 13 of the casing 3 for example.
  • the fastening flange 8 comprises bores intended to come into contact with threaded bores formed on the casing 3.
  • the bores allow the passage of fixing members 10, such as screws, cooperating with the threaded bores. of the casing 3, so as to secure the pressurizing device 1 to the casing 3.
  • the fastening flange 8 has a particular shape. Indeed, the fastening flange 8 comprises a first portion along a portion of the periphery of the frame 5 and a second portion, cradle, substantially circular whose center corresponds to the center of rotation C of the output gear 4 of the power take-off 2. The second portion of the fastening flange 8 allows the output gear 4 of the power take-off 2 to pass so that the pinion 7 cooperates directly with the output pinion 4. Furthermore, the fastening flange 8 is also equipped with centering and positioning means relative to the casing 3. These centering and positioning means provide a precise dynamic coupling between the power take-off 2 and the setting device. under pressure 1.
  • the centering and positioning means comprise cavities 9 for receiving pins of complementary shapes, formed on the housing 3.
  • the cavities 9 can be formed in the housing 3 while the pins of complementary shapes are carried by the fastening flange 8.
  • the pins must have a length and strength sufficient to allow the support of the device.
  • the centering and positioning means will advantageously comprise only two cavities 9 and that the line passing through these two cavities also passes through the center C of rotation of the output pinion 4 of the power take-off 2.
  • the positioning of the device 1 with respect to the power take-off 2 is ensured in a precise manner by limiting the number of cavities 9 used.
  • positioning pins may be indifferently cylindrical in shape, conical or more generally any suitable shape.
  • the fastening flange 8 comprises a female interlocking structure 18, or male, intended to receive a conjugate interlocking structure formed on the fastening flange 13 of the casing of the power take - off 2.
  • the pressurizing device 1 comprises an internal lubrication circuit and means for connecting the internal circuit to a circuit of lubrication of the motor vehicle.
  • the internal circuit of the device 1 is connected to a vehicle lubrication circuit located in the power take-off, for example, and comprising a reservoir and a pump for circulating the lubricant towards the internal circuit of the device 1.
  • FIGS. 5 to 8 illustrate in detail the internal lubrication circuit.
  • the lubrication circuit of the motor vehicle is here fed to the device via the output pinion support shaft 4, not shown, the inner bore forms a lubricant routing conduit.
  • the end of the output pinion support shaft 4 is introduced into a supply port 19 of the device extending along the axis C of rotation of the output pinion 4.
  • the positioning pins formed on the housing 3 have a length sufficient to allow the positioning of the device 1 relative to the power take-off 2 before introducing the end of the shaft into the feed port 19.
  • the lubricant is then conveyed from the supply port 19 to a lubricant filter 21 by means of a first channel 20, shown in FIG. 6.
  • the purified lubricant is then conveyed to the bearings 22a, 22b of the shafts 6a, 6b via a second duct 23, shown in FIGS. 7 and 8.
  • the bearing armatures 23a, 23b have slots 24a, 24b of passages for the lubricant.
  • the lubricant then descends by gravity to the bottom of the frame 5. Thereafter, the lubricant can be collected by means of a pumping device carried, for example, by the power take-off.
  • the fluid pressure device 1 has a mass and dimensions arranged so that the forces applied by the device associated with the power take-off are less than the allowable loads at the junction of the socket. of movement on the gearbox.
  • the dimensions and the thickness of the walls of the frame are optimized.
  • the coupling gear 7 and / or the output gear 4 of the power take-off 2 are adapted to drive the movable shafts at speeds of the order of 10,000 to 20,000 revolutions per minute.
  • Figures 10 and 11 illustrate a second embodiment of the invention.
  • the device 1 comprises a frame 5, supporting two shafts 6a, 6b rotatable in opposite directions of rotation, synchronization means and a removable pinion 7 adapted to be mounted alternately on the first 6a or the second shaft 6b according to the direction of rotation of said power take-off 2.
  • the device 1 comprises a device for multiplying the speed of rotation, composed of a succession of gears 26, 27, 28 whose sizes are adapted to obtain the desired multiplication ratio.
  • the device comprises a splined shaft 25, shown in Figure 10, intended to be engaged in a rotary sleeve of the power take-off.
  • the device comprises a fastening flange 26 intended to be fixed on the casing 3 of the power take-off 2.
  • This device 1 is adaptable to different gearboxes and market power take-off. Note however that the device obtained according to the second embodiment is more bulky and heavy than that which can be obtained according to the first embodiment. Nevertheless, this embodiment may be suitable for solutions requiring low compression power, whose weight and size remain measured.

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

Abstract

The invention relates to a device (1) for pressurising a fluid to be combined with a rotary power takeoff of a vehicle including a casing and at least one multiplication stage (4), said device comprising a frame (5) bearing at least one first rotatably moveable shaft (6a, 6b) bearing a member for moving the fluid and dynamic coupling means (7) for coupling the shaft (6a, 6b) to the power takeoff. The frame (5) includes means for bearing and attaching to the casing and said coupling means (7) are arranged so as to directly connect the mobile shaft (6a, 6b) to the multiplication stage (4) of the power takeoff. The invention also relates to a device (1) for pressurising a fluid, comprising a frame (5), rotatably moveable first and second shafts (6a, 6b) each bearing a member for moving the fluid, and dynamic coupling means for coupling the first or second shaft (6a, 6b) to the power takeoff (2), comprising a removable pinion (7) that can be alternately mounted on the first (6a) or second (6b) shaft. Finally, the invention also relates to a system including a power takeoff and to a device for pressurising a fluid.

Description

DISPOSITIF DE MISE SOUS PRESSION D'UN FLUIDE DESTINE A ETRE DIRECTEMENT SUR UNE PRISE DE MOUVEMENT DEVICE FOR PRESSURIZING A FLUID TO BE DIRECTLY ON A TAKE OF MOTION
DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION
[001] L'invention concerne un dispositif de mise sous pression d'un fluide, destiné à être fixé à une prise de mouvement d'un véhicule automobile et un système comprenant une prise de mouvement et un tel dispositif de mise sous pression.[001] The invention relates to a device for pressurizing a fluid, intended to be attached to a power take-off of a motor vehicle and a system comprising a power take-off and such a device for pressurizing.
[002] L'invention concerne notamment les compresseurs et les pompes raccordés à une prise de mouvement d'un véhicule automobile.[002] The invention particularly relates to compressors and pumps connected to a power take-off of a motor vehicle.
ÉTAT DE LA TECHNIQUESTATE OF THE ART
[003] Dans l'art antérieur, il est connu des dispositifs de mise sous pression d'un fluide, tels que des pompes ou des compresseurs, qui sont associés à la prise de mouvement rotatif d'un véhicule automobile.[003] In the prior art, there are known devices for pressurizing a fluid, such as pumps or compressors, which are associated with the rotary take-off of a motor vehicle.
[004] Les prises de mouvement sont généralement fixées sur une boîte de vitesse et prennent leur mouvement de rotation sur un des pignons de ladite boîte de vitesse. Les prises de mouvement comprennent un manchon de sortie destiné à transmettre le mouvement à un arbre de transmission et, couramment, un embrayage de commande, séparé de l'embrayage principal du véhicule, permettant de connecter ou déconnecter la boîte de vitesse à la sortie de la prise de mouvement. Les prises de mouvement peuvent en outre inclure une multiplication de vitesse entre la vitesse d'entrée et la vitesse de sortie. Les rapports de réduction ou de multiplication sont communément compris entre 0.5 et 2.[004] The power take-offs are generally fixed on a gearbox and take their rotational movement on one of the gears of said gearbox. The power take-offs include an output sleeve for transmitting motion to a drive shaft and commonly a control clutch, separate from the main clutch of the vehicle, for connecting or disconnecting the gearbox to the output of the transmission. the power take-off. The power take-offs may further include a speed multiplication between the input speed and the output speed. The ratios of reduction or multiplication are commonly between 0.5 and 2.
[005] Les dispositifs de mise sous pression comportent au moins un bâti et un ou deux arbres, mobiles en rotation, portant un organe assurant la mise sous pression du fluide, pompe ou compresseur. Habituellement, le bâti des dispositifs de mise sous pression est monté sur le châssis du véhicule et un arbre de transmission à cardan, connecté d'une part à la prise de mouvement et d'autre part au dispositif de mise sous pression permet de transmettre le mouvement de la prise de mouvement vers le dispositif de mise sous pression.[005] The pressurizing devices comprise at least one frame and one or two shafts, movable in rotation, carrying a member ensuring the setting under fluid pressure, pump or compressor. Usually, the frame of the pressurizing devices is mounted on the chassis of the vehicle and a cardan shaft, connected on the one hand to the power take-off and on the other hand to the pressurizing device, transmits the movement of the power take-off to the pressurizing device.
[006] Dans certains cas, et c'est notamment le cas particulier des compresseurs à vis, la vitesse de sortie des prises de mouvement est insuffisante pour entraîner à la bonne vitesse les organes de compression. De ce fait, un multiplicateur est intégré au compresseur. En effet, la vitesse de rotation à la sortie d'une prise de mouvement ne peut atteindre qu'environ 2000 tours/min alors que la vitesse nécessaire au bon fonctionnement d'un compresseur à vis est supérieure à 10 000 tours/minutes.[006] In some cases, and this is particularly the case of screw compressors, the output speed of the power take-off is insufficient to drive the compression gear at the right speed. As a result, a multiplier is integrated into the compressor. Indeed, the speed of rotation at the output of a power take-off can reach only about 2000 rpm while the speed required for the proper operation of a screw compressor is greater than 10,000 revolutions / minute.
[007] Par ailleurs, les dispositifs de mise sous pression comportent un organe de sécurité permettant de limiter le couple transmis entre la prise de mouvement et l'organe mobile assurant la mise sous pression d'un fluide. En effet, en cas de blocage du compresseur ou de la pompe, il est nécessaire de limiter le couple transmis pour éviter la rupture des organes de transmission.[007] Furthermore, the pressurizing devices comprise a safety member for limiting the torque transmitted between the power take-off and the movable member ensuring the pressurization of a fluid. Indeed, in case of blockage of the compressor or the pump, it is necessary to limit the torque transmitted to prevent the rupture of the transmission members.
[008] Par conséquent, les dispositifs de l'art antérieur présentent un encombrement important, en raison de la présence d'un multiplicateur et d'un dispositif pour limiter le couple, de sorte que l'intégration de ces dispositifs à un véhicule automobile n'est pas satisfaisante. En outre, l'installation de ces dispositifs est complexe car ils doivent être préalablement fixés au châssis du véhicule, puis connectés à la prise de mouvement par l'arbre de transmission à cardan.[008] Consequently, the devices of the prior art have a large size, because of the presence of a multiplier and a device for limiting the torque, so that the integration of these devices to a motor vehicle is not satisfactory. In addition, the installation of these devices is complex because they must be previously attached to the chassis of the vehicle, and then connected to the power take-off by the cardan shaft.
[009] Par ailleurs, il est divulgué, dans la demande de brevet WO 2007/0589594, un dispositif comportant une pompe hydraulique dans un boîtier qui est monté de façon amovible sur la prise de mouvement.Furthermore, it is disclosed in the patent application WO 2007/0589594, a device comprising a hydraulic pump in a housing which is removably mounted on the power take-off.
[0010] Toutefois, dans le cas de dispositifs de mise en pression présentant des fortes puissances, et par conséquent de tailles et de poids importants, cette solution n'est pas satisfaisante car les masses mises en jeu engendrent des chargements trop importants à la jonction entre la prise de mouvement et la boîte de vitesse. Cette solution n'est donc pas non plus satisfaisante.[0010] However, in the case of pressurizing devices having high power, and therefore large sizes and weight, this solution is not satisfactory because the masses involved generate too large loads at the junction between the power take-off and the gearbox. This solution is therefore not satisfactory either.
[0011] En outre, selon les constructeurs, le sens de rotation à la sortie des boîtes de vitesse et donc à la sortie des prises de mouvement peut être horaire ou antihoraire. Ainsi, dans l'art antérieur, soit les dispositifs de mise en pression d'un fluide sont adaptés de série à l'un ou l'autre des sens de rotation, soit un inverseur de sens de rotation est disposé entre la prise de mouvement et le dispositif. La première solution oblige les fabriquant à prévoir deux références différentes de dispositifs alors que la seconde solution augmente l'encombrement et la complexité du système.In addition, according to the manufacturers, the direction of rotation at the output of the gearboxes and therefore the output of the power take-offs can be hourly or counterclockwise. Thus, in the prior art, the devices for pressurizing a fluid are adapted in series to one or the other of the directions of rotation, or a reverser of direction of rotation is arranged between the power take-off and the device. The first solution requires manufacturers to provide two different references of devices while the second solution increases the size and complexity of the system.
OBJET DE L'INVENTIONOBJECT OF THE INVENTION
[0012] L'invention vise à remédier à ces problèmes en proposant un dispositif de mise sous pression d'un fluide destiné à être associé à une prise de mouvement rotatif, qui soit fiable et dont l'encombrement et l'intégration sur le véhicule automobile soient satisfaisants.The invention aims to remedy these problems by proposing a device for pressurizing a fluid intended to be associated with a rotary power take-off, which is reliable and whose size and integration on the vehicle automobile are satisfactory.
[0013] À cet effet, et selon un premier aspect, l'invention propose un dispositif de mise sous pression d'un fluide, destiné à être associé à une prise de mouvement rotatif d'un véhicule automobile comprenant un carter et au moins un étage de multiplication, ledit dispositif comportant un bâti supportant au moins un premier arbre mobile en rotation portant un organe pour la mise en mouvement du fluide et des moyens d'accouplement dynamique de l'arbre à la prise de mouvement. Le dispositif est remarquable ce que le bâti comprend des moyens de support et de fixation au carter de la prise de mouvement et en ce que lesdits moyens d'accouplement sont agencés pour raccorder directement l'arbre mobile à l'étage de multiplication de la prise de mouvement.For this purpose, and according to a first aspect, the invention provides a device for pressurizing a fluid, intended to be associated with a rotary power take-off of a motor vehicle comprising a housing and at least one multiplication stage, said device comprising a frame supporting at least a first movable rotating shaft carrying a member for the setting in motion of the fluid and dynamic coupling means of the shaft to the power take-off. The device is remarkable that the frame comprises support means and fixing to the casing of the power take-off and in that said coupling means are arranged to directly connect the movable shaft to the multiplication stage of the socket. of movement.
[0014] Ainsi, l'intégration et la fixation du dispositif sont satisfaisantes car le bâti du dispositif est fixé et supporté par le carter de la prise de mouvement.Thus, the integration and the attachment of the device are satisfactory because the frame of the device is attached and supported by the crankcase of the power take-off.
[0015] En outre, les moyens d'accouplement dynamique raccordent directement l'arbre mobile, portant l'organe de mise en mouvement du fluide, à la prise de mouvement. Le dispositif de mise sous pression ne comporte donc pas de multiplicateur car celui-ci est déporté dans le carter de la prise de mouvement.In addition, the dynamic coupling means directly connect the movable shaft, carrying the fluid moving member, to the power take-off. The pressurizing device therefore does not include a multiplier because it is offset in the casing of the power take-off.
[0016] Ainsi, la charge liée au multiplicateur est rapprochée au plus près de la jonction entre la prise de mouvement et la boîte de vitesse de sorte que le dispositif, ainsi constitué, est plus compact, plus léger et le système constitué du dispositif et de la prise de mouvement devient ainsi compatible avec les chargements admissibles à la jonction entre la prise de mouvement et la boîte de vitesse.Thus, the load related to the multiplier is close to closer to the junction between the power take-off and the gearbox so that the device, thus formed, is more compact, lighter and the system consists of the device and The power take-off thus becomes compatible with the allowable loadings at the junction between the power take-off and the gearbox.
[0017] Notons que l'on entend ici par raccordement « direct » entre l'arbre mobile et l'étage de multiplication de la prise de mouvement, le fait que les moyens d'accouplement comporte un élément unique de transmission entre l'étage de multiplication et l'arbre mobile. En d'autres termes, le dispositif ne comprend donc pas d'étage de multiplication, autre que celui de la prise de mouvement.Note that here is meant by "direct" connection between the movable shaft and the multiplication stage of the power take-off, the fact that the coupling means comprises a single transmission element between the stage of multiplication and the movable tree. In other words, the device therefore does not include a multiplication stage, other than that of the power take-off.
[0018] Avantageusement, les moyens d'accouplement comprennent un pignon porté par le premier arbre mobile. Ce moyen d'accouplement permet une coopération directe avec le pignon de sortie de la prise de mouvement. L'entraînement de ces pignons permet une multiplication de la vitesse de rotation.Advantageously, the coupling means comprise a pinion carried by the first movable shaft. This coupling means allows direct cooperation with the output gear of the power take-off. The drive of these gears allows a multiplication of the speed of rotation.
[0019] Dans un mode de réalisation, les moyens de fixation comportent une bride de fixation périphérique, destinée à être disposée contre le carter de la prise de mouvement. Avantageusement, la bride de fixation comporte une portion en forme de berceau de sorte à permettre le passage de l'étage de multiplication de la prise de mouvement.In one embodiment, the fastening means comprise a peripheral fastening flange, intended to be arranged against the casing of the power take-off. Advantageously, the fixing flange comprises a cradle-shaped portion so as to allow passage of the multiplication stage of the power take-off.
[0020] Avantageusement, les moyens de fixation comportent des moyens de centrage et de positionnement. Ces moyens permettent d'assurer un accouplement dynamique précis entre le dispositif et la prise de mouvement.Advantageously, the fixing means comprise centering and positioning means. These means make it possible to ensure precise dynamic coupling between the device and the power take-off.
[0021] Avantageusement, le dispositif de transfert comprend un circuit interne de lubrification et des moyens de raccordement du circuit interne au circuit de lubrification du véhicule automobile. En effet, dans certains cas particuliers, les organes tournants du dispositif peuvent nécessiter une lubrification forcée. L'invention répond à ce besoin en prévoyant un circuit de lubrification apte à être connecté à un circuit de lubrification du véhicule automobile comportant des moyens de pompage et disposé, par exemple, dans le carter de la prise de mouvement. Ainsi, le poids et l'encombrement des moyens de pompage du lubrifiant et du réservoir de lubrifiant sont supportés par le véhicule automobile, en particulier par la prise de mouvement, de sorte que l'encombrement et le poids du dispositif de mise sous pression soient peu affectés par les moyens de lubrification. Dans un mode de réalisation préféré, les moyens de raccordement comportent un orifice d'alimentation s'étendant dans l'axe de rotation C de l'étage de multiplication de la prise de mouvement de sorte à permettre une amenée du lubrifiant par l'arbre de support dudit étage de multiplication. Cette solution est particulièrement compacte. En outre, le circuit interne de lubrification comporte un filtre.Advantageously, the transfer device comprises an internal lubrication circuit and means for connecting the internal circuit to the lubrication circuit of the motor vehicle. Indeed, in some particular cases, the rotating members of the device may require forced lubrication. The invention meets this need by providing a lubrication circuit capable of being connected to a lubrication circuit of the motor vehicle comprising pumping means and arranged, for example, in the casing of the power take-off. Thus, the weight and bulk of the pumping means of the lubricant and the lubricant reservoir are supported by the motor vehicle, in particular by the power take-off, so that the size and the weight of the pressurizing device are little affected by the lubrication means. In a preferred embodiment, the connection means comprise a supply orifice extending in the axis of rotation C of the multiplication stage of the power take-off so as to allow a supply of the lubricant by the shaft. supporting said multiplication stage. This solution is particularly compact. In addition, the internal lubrication circuit includes a filter.
[0022] Selon un second aspect, l'invention concerne un dispositif de mise sous pression d'un fluide, destiné à être associé à une prise de mouvement rotatif d'un véhicule automobile comprenant un carter, ledit dispositif comportant un bâti, un premier et un second arbres mobiles en rotation portant chacun un organe pour la mise en mouvement du fluide, des moyens de synchronisation de la rotation des premier et second arbres agencés pour entraîner le premier arbre selon un premier sens de rotation et le second arbre selon un second sens de rotation dans un rapport de vitesse adapté ; et des moyens d'accouplement dynamique du premier ou du second arbre à la prise de mouvement. Le dispositif est remarquable en ce que lesdits moyens d'accouplement comportent un pignon amovible apte à être monté soit sur le premier soit sur le second arbre, en fonction du sens de rotation de ladite prise de mouvement, de sorte à entraîner le premier arbre selon le premier sens de rotation et le second arbre selon le second sens de rotation et, cela, indépendamment du sens de rotation de ladite prise de mouvement.According to a second aspect, the invention relates to a device for pressurizing a fluid, intended to be associated with a rotary power take-off of a motor vehicle comprising a housing, said device comprising a frame, a first and a second rotating shafts each carrying a member for moving the fluid, means for synchronizing the rotation of the first and second shafts arranged to drive the first shaft in a first direction of rotation and the second shaft in a second direction. direction of rotation in a suitable gear ratio; and means for dynamically coupling the first or second shaft to the power take-off. The device is remarkable in that said coupling means comprise a removable pinion adapted to be mounted either on the first or on the second shaft, depending on the direction of rotation of said power take-off, so as to cause the first shaft in the first direction of rotation and the second shaft in the second direction of rotation and that regardless of the direction of rotation of said power take-off.
[0023] Ainsi, le dispositif selon le second aspect de l'invention est adaptable aux différentes boîtes de vitesse et prise de mouvement du marché. En outre, cette adaptation est simple et ne nécessite pas un adaptateur supplémentaire qui augmenterait le poids et l'encombrement du dispositif, de sorte que cette solution est particulièrement intéressante lorsque le bâti du dispositif est fixé et supporté par le carter de la prise de mouvement.Thus, the device according to the second aspect of the invention is adaptable to different gearboxes and market power take-off. In addition, this adaptation is simple and does not require an additional adapter that would increase the weight and size of the device, so that this solution is particularly interesting when the frame of the device is fixed and supported by the casing of the power take-off .
[0024] En outre, les moyens de synchronisation présentent avantageusement un rapport de multiplication de l'ordre de 1,2.In addition, the synchronization means advantageously have a multiplication ratio of the order of 1.2.
[0025] Enfin l'invention concerne un système comportant une prise de mouvement rotatif comprenant un carter et un dispositif de mise sous pression d'un fluide selon le premier et/ou le second aspect de l'invention, associé audit carter.Finally, the invention relates to a system comprising a rotary power take-off comprising a casing and a device for pressurizing a fluid according to the first and / or second aspect of the invention, associated with said casing.
BRÈVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES
[0026] D'autres objets et avantages de l'invention apparaîtront au cours de la description qui suit, faite en référence aux dessins annexés, dans lesquels :Other objects and advantages of the invention will become apparent from the following description, made with reference to the accompanying drawings, in which:
- la figure 1 a est une vue en perspective d'un dispositif de mise sous pression selon l'invention, coopérant avec un pignon de transmission du mouvement appartenant à la prise de mouvement ;- Figure 1a is a perspective view of a pressurizing device according to the invention, cooperating with a transmission pinion of the movement belonging to the power take-off;
- la figure 1 b est une vue en perspective d'un système comportant un dispositif de mise sous pression et une prise de mouvement, dont le carter est destiné à venir se fixer sur une boîte de vitesse ;- Figure 1b is a perspective view of a system comprising a pressurizing device and a power take-off, the housing is intended to be fixed on a gearbox;
- la figure 2 est une vue en perspective détaillée du dispositif de mise en pression de la figure 1 a ; - la figure 3 est une vue de face d'un dispositif selon l'invention illustrant les moyens de support et de fixation au carter ;FIG. 2 is a detailed perspective view of the pressurizing device of FIG. 1a; - Figure 3 is a front view of a device according to the invention illustrating the support means and fixing to the housing;
- la figure 4 est une vue en perspective d'un dispositif selon l'invention comportant des moyens de centrage et de positionnement selon un second mode de réalisation ;FIG. 4 is a perspective view of a device according to the invention comprising centering and positioning means according to a second embodiment;
- la figure 5 est une vue en perspective d'un dispositif selon l'invention, illustrant les moyens de raccordement du circuit interne de lubrification à un circuit de lubrification du véhicule automobile ;- Figure 5 is a perspective view of a device according to the invention, illustrating the connection means of the internal lubrication circuit to a lubrication circuit of the motor vehicle;
- la figure 6 est une vue du dispositif de la figure 5, en coupe selon le plan Vl-Vl ;- Figure 6 is a view of the device of Figure 5, in section along the plane VI-Vl;
- la figure 7 est une vue du dispositif de la figure 5, en coupe selon le plan VII-VII ;- Figure 7 is a view of the device of Figure 5, in section along the plane VII-VII;
- la figure 8 est une vue en coupe transversal du dispositif de la figure 5 ;FIG. 8 is a cross-sectional view of the device of FIG. 5;
- la figure 9 illustre un système selon l'invention comportant une prise de mouvement et un dispositif de mise sous pression, monté sur une boîte de vitesse ;FIG. 9 illustrates a system according to the invention comprising a power take-off and a pressurizing device, mounted on a gearbox;
- les figures 10, 11 et 12 illustrent un dispositif selon un second mode de réalisation de l'invention.- Figures 10, 11 and 12 illustrate a device according to a second embodiment of the invention.
EXEMPLE DE RÉALISATIONEXAMPLE OF REALIZATION
[0027] Le dispositif de mise sous pression d'un fluide représenté sur les figures 1 à 11 est un compresseur à vis 1.The device for pressurizing a fluid shown in FIGS. 1 to 11 is a screw compressor 1.
[0028] Le compresseur 1 est destiné à être associé à une prise de mouvement 2 d'un véhicule automobile, représentée sur les figures 1 b et 10. La prise de mouvement 2 comporte un carter 3 qui est destiné à être fixé sur la boîte de vitesse 17 d'un véhicule automobile, représentée sur la figure 10. La prise de mouvement coopère avec un arbre de sortie de la boîte de vitesse 17. Bien évidemment, le carter 3 comporte des moyens de fixation sur la boîte de vitesse 17 du véhicule automobile.The compressor 1 is intended to be associated with a power take-off 2 of a motor vehicle, shown in Figures 1b and 10. The power take-off 2 comprises a housing 3 which is intended to be fixed on the box 17 of a motor vehicle, shown in Figure 10. The power take-off cooperates with an output shaft of the gearbox 17. Well obviously, the casing 3 comprises fixing means on the gearbox 17 of the motor vehicle.
[0029] Dans un mode de réalisation avantageux, la prise de mouvement 2 est équipée d'un dispositif de limitation du couple transmis, non représenté. Ce dispositif permet de protéger les organes de transmission en cas de blocage d'un arbre mobile du dispositif 1.In an advantageous embodiment, the PTO 2 is equipped with a torque limiting device transmitted, not shown. This device makes it possible to protect the transmission members in the event of blockage of a mobile shaft of the device 1.
[0030] Dans un premier mode de réalisation de l'invention, la prise de mouvement 2 comporte, en sortie, un pignon 4, illustré sur les figures 1a et 2, et constituant un étage de multiplication.In a first embodiment of the invention, the PTO 2 comprises, at the output, a pinion 4, illustrated in Figures 1a and 2, and constituting a multiplication stage.
[0031] Le dispositif de mise sous pression comporte un bâti 5 qui est destiné à être associé au carter 3 de la prise de mouvement 2.The pressurizing device comprises a frame 5 which is intended to be associated with the casing 3 of the power take-off 2.
[0032] Par ailleurs, le dispositif de mise sous pression 1 comporte, dans le mode de réalisation représenté, deux arbres 6a, 6b mobiles en rotation sur le bâti 5, respectivement autour d'un premier axe A et d'un second axe B, parallèles. Chacun des arbres 6a, 6b porte une vis de compression, non représentée, s'étendant dans une chambre de compression du dispositif 1. Le dispositif 1 comprend un orifice d'amenée et un orifice de sortie du fluide communiquant avec la chambre de compression.Furthermore, the pressurizing device 1 comprises, in the embodiment shown, two shafts 6a, 6b rotatable on the frame 5, respectively about a first axis A and a second axis B , parallel. Each of the shafts 6a, 6b carries a compression screw, not shown, extending in a compression chamber of the device 1. The device 1 comprises a feed orifice and a fluid outlet orifice communicating with the compression chamber.
[0033] Les deux vis présentent des profils complémentaires et sont imbriquées l'une dans l'autre, sans toutefois entrer en contact l'une avec l'autre. Une vis, nommée femelle, présente des lobes profilés concaves et l'autre, nommée mâle, présente des lobes profilés convexes. En fonctionnement, pour comprimer le fluide, la première vis tourne selon un premier sens de rotation alors que la seconde vis tourne selon un second sens de rotation. Dans un mode de réalisation particulier de l'invention, la vis femelle présente 6 lobes profilés concaves alors que la vis mâle présente 5 lobes profilés convexes. Du fait du nombre de lobes différents, les vitesses relatives sont dans un rapport 5/6 ou 6/5 suivant la vis prise en référence. [0034] Les rotations des vis sont synchronisées. Pour ce faire, les arbres 6a, 6b portent chacun une roue d'engrenage 11a, 11b coopérant l'une avec l'autre. Les deux roues d'engrenage 11a, 11b forment des moyens de synchronisation de la rotation des arbres 6a, 6b permettant d'entraîner lesdits arbres selon des sens de rotations inversés. Bien sûr, les moyens de synchronisation seront adaptés pour respecter les rapports de vitesse de rotation entre les vis. Notons que l'on pourra utiliser tous moyens équivalents pour réaliser la fonction de synchronisation des vitesses de rotation.The two screws have complementary profiles and are nested one inside the other, but do not come into contact with each other. One screw, called female, has concave profiled lobes and the other, named male, has convex profiled lobes. In operation, to compress the fluid, the first screw rotates in a first direction of rotation while the second screw rotates in a second direction of rotation. In a particular embodiment of the invention, the female screw has 6 concave profiled lobes while the male screw has 5 convex profiled lobes. Due to the number of different lobes, the relative speeds are in a ratio of 5/6 or 6/5 depending on the screw taken as a reference. The rotations of the screws are synchronized. To do this, the shafts 6a, 6b each carry a gear wheel 11a, 11b cooperating with each other. The two gear wheels 11a, 11b form means for synchronizing the rotation of the shafts 6a, 6b for driving said shafts in directions of inverted rotation. Of course, the synchronization means will be adapted to respect the rotational speed ratios between the screws. Note that we can use any equivalent means to achieve the rotation speed synchronization function.
[0035] Par ailleurs, l'un des arbres 11a, 11b supporte un pignon 7 formant moyen d'accouplement avec le pignon de sortie 4 de la prise de mouvement 2. Le pignonFurthermore, one of the shafts 11a, 11b supports a pinion 7 forming a coupling means with the output gear 4 of the power take-off 2. The pinion
7 formant moyen d'accouplement présente une taille et un nombre de dents inférieurs à la taille et au nombre de dents du pignon de sortie 4 de la prise de mouvement 2 de sorte à assurer une multiplication de la vitesse de rotation. Le ratio de multiplication est, par exemple, ici de l'ordre de 3. Ainsi, en fonctionnement, les arbres mobiles 6a, 6b sont susceptibles d'être entraînés à des vitesses de rotation importantes de l'ordre de 10 000 à 20 000 tours par minute par exemple.7 forming coupling means has a size and a number of teeth smaller than the size and the number of teeth of the output gear 4 of the power take-off 2 so as to ensure a multiplication of the speed of rotation. The multiplication ratio is, for example, here of the order of 3. Thus, in operation, the movable shafts 6a, 6b are capable of being driven at high rotational speeds of the order of 10 000 to 20 000 revolutions per minute for example.
[0036] Avantageusement, le pignon 7 est amovible et est apte à être monté alternativement sur une extrémité du premier 6a ou du second arbre 6b. Ce mode de réalisation permet d'adapter le dispositif de mise sous pression 1 aux différentes boîtes de vitesse du marché. En effet, les arbres de sortie des boîtes de vitesse 17 du marché peuvent indifféremment être entraînés en rotation dans le sens horaire ou dans le sens anti-horaire. Aussi, en positionnant le pignon 7 sur l'un ou l'autre des arbres, le dispositif 1 de mise sous pression s'adapte aux différents types de boîte de vitesse 17 et de prise de mouvement existantes.Advantageously, the pinion 7 is removable and is adapted to be mounted alternately on one end of the first 6a or the second shaft 6b. This embodiment makes it possible to adapt the pressurizing device 1 to the different gearboxes on the market. Indeed, the output shafts of the gearboxes 17 of the market can indifferently be driven in rotation in the clockwise direction or in the counterclockwise direction. Also, by positioning the pinion 7 on one or other of the shafts, the device 1 for pressurizing adapts to the different types of gearbox 17 and existing power take-off.
[0037] Par conséquent, avant de monter le dispositif sur une prise de mouvement, on placera le pignon 7 sur le premier 6a ou le second arbre 6b, en fonction du sens de rotation de la prise de mouvement 2. Ainsi, quel que soit le sens de rotation de la prise de mouvement 2, on pourra toujours entraîner le premier arbre 6a selon le premier sens de rotation et le second arbre 6b selon le deuxième sens de rotation.Therefore, before mounting the device on a power take-off, the pinion 7 will be placed on the first 6a or the second shaft 6b, depending on the direction of rotation of the power take-off 2. Thus, whatever the direction of rotation of the power take-off 2, we can always drive the first shaft 6a in the first direction of rotation and the second shaft 6b in the second direction of rotation.
[0038] On notera que les axes des deux arbres 6a, 6b sont placés à une distance égale de l'axe de rotation C du pignon de sortie 4, afin de permettre l'entraînement de l'un ou l'autre des arbres.Note that the axes of the two shafts 6a, 6b are placed at an equal distance from the axis of rotation C of the output pinion 4, to allow the drive of one or the other of the shafts.
[0039] En outre, afin de permettre le montage du pignon 7 sur l'un ou l'autre des arbres 6a, 6b, les arbres 6a, 6b comportent des extrémités de réception du pignon 7, identiques et adaptés à recevoir l'alésage central du pignon 7. Afin de solidariser le pignon 7 aux arbres 6a, 6b, on notera que l'alésage central du pignon 7 comporte des cannelures longitudinales 15 s'engageant dans des rainures 16 longitudinales des arbres 6a, 6b.In addition, to allow the mounting of the pinion 7 on one or the other of the shafts 6a, 6b, the shafts 6a, 6b have receiving ends of the pinion 7, identical and adapted to receive the bore central pinion 7. In order to secure the pinion 7 to the shafts 6a, 6b, it will be noted that the central bore of the pinion 7 comprises longitudinal grooves 15 engaging in longitudinal grooves 16 of the shafts 6a, 6b.
[0040] Par ailleurs, on note que l'arbre 6a, 6b qui ne supporte pas le pignon 7 supporte une entretoise amovible 14 de protection. Bien sûr, afin de permettre l'interchangeabilité du pignon 7 et de l'entretoise 14, les alésages du pignon 7 et de l'entretoise 14 sont identiques. De ce fait, l'adaptation du dispositif en fonction du sens de rotation de la prise de mouvement s'effectue en permutant la position de l'entretoise 14 et du pignon 7 sur l'un et l'autre des arbres 6a, 6b. L'entretoise 14 présente évidemment un diamètre extérieur inférieur au diamètre du pignon 7, de sorte que, lorsque le dispositif est associé à la prise de mouvement, l'entretoise 14 ne rentre pas en contact avec le pignon de sortie 4 de la prise de mouvement 2.Furthermore, it is noted that the shaft 6a, 6b which does not support the pinion 7 supports a removable spacer 14 of protection. Of course, in order to allow the interchangeability of the pinion 7 and the spacer 14, the bores of the pinion 7 and the spacer 14 are identical. As a result, the adaptation of the device according to the direction of rotation of the power take-off is effected by permuting the position of the spacer 14 and the pinion 7 on one and the other of the shafts 6a, 6b. The spacer 14 obviously has an outside diameter smaller than the diameter of the pinion 7, so that when the device is associated with the power take-off, the spacer 14 does not come into contact with the output pinion 4 of the take-off. movement 2.
[0041] Par ailleurs, on note que les vitesses de rotation à la sortie des boîtes de vitesse 17 sont différentes, de construction. En outre, cette différence de vitesse est couramment liée au sens de rotation, horaire ou anti-horaire, à la sortie de la boîte de vitesse 17. Par conséquent, afin de permettre un fonctionnement optimal du dispositif quel que soit le type de boîte de vitesse 17 utilisée, on peut prévoir que les vitesses de rotation de chaque vis soit identique, en fonctionnement et que le rapport de vitesses entre les vis soit sensiblement identique au rapport de vitesses de rotation entre les boîtes dont la sortie est entraînée dans le sens horaire et les boîtes dont la sortie est entraînée dans le sens anti-horaire.Moreover, it is noted that the rotational speeds at the output of the gearboxes 17 are different, of construction. In addition, this difference in speed is commonly related to the direction of rotation, clockwise or anticlockwise, at the output of the gearbox 17. Therefore, in order to allow optimal operation of the device regardless of the type of gearbox. speed 17 used, it can be provided that the rotational speeds of each screw is identical, in operation and that the gear ratio between the screws is substantially identical to the rotational speed ratio between the boxes whose output is driven in the direction and the boxes whose output is drawn counterclockwise.
[0042] Typiquement, le rapport de vitesses de sortie entre les deux types de boîte est de l'ordre de 1 ,15 Les roues d'engrenage 11a, 11 b présentent donc des tailles et des nombres de dents adaptés au rapport 6/5 des lobes des vis mâle et femelle. Ce rapport de 1 ,2 est astucieusement utilisé en relation avec le rapport 1 ,15 des types de boîte pour maintenir la vitesse du moteur d'entraînement au régime le plus adapté entre 1200 rotation par minute et 1400 rotation par minute environ.Typically, the ratio of output speeds between the two types of box is of the order of 1, 15 The gear wheels 11a, 11b thus have sizes and numbers of teeth adapted to the ratio 6/5 lobes of male and female screws. This ratio of 1, 2 is cleverly used in relation to ratio 1, 15 of the box types to maintain the speed of the drive motor at the most suitable speed between about 1200 rotations per minute and about 1400 rotations per minute.
[0043] Par ailleurs, le bâti 5 comprend des moyens de fixation au carter 3 de la prise de mouvement 2. Ces moyens sont aptes à soutenir et à supporter le dispositif 1 de mise sous-pression. En d'autres termes, le dispositif 1 de mise sous pression n'est fixé et supporté que par l'intermédiaire de ces moyens et n'est pas directement fixé par d'autres moyens au châssis du véhicule. Le bâti 5 peut donc être considéré comme autoportant.Furthermore, the frame 5 comprises fixing means to the casing 3 of the power take-off 2. These means are able to support and support the device 1 for putting under pressure. In other words, the pressurizing device 1 is fixed and supported only by means of these means and is not directly fixed by other means to the chassis of the vehicle. The frame 5 can therefore be considered as self-supporting.
[0044] Les moyens de support et de fixation comprennent une bride de fixation périphérique 8 qui est adaptée pour venir coopérer avec le carter 3 de la prise de mouvement 2, via une bride de fixation adaptée 13 du carter 3 par exemple. La bride de fixation 8 comprend des alésages destinés à venir en vis-à-vis d'alésages taraudés formés sur le carter 3. Les alésages permettent le passage d'organes de fixation 10, tels que des vis, venant coopérer avec les alésages filetées du carter 3, de sorte à solidariser le dispositif de mise sous pression 1 au carter 3.The support and fixing means comprise a peripheral fastening flange 8 which is adapted to cooperate with the casing 3 of the power take-off 2, via a suitable fastening flange 13 of the casing 3 for example. The fastening flange 8 comprises bores intended to come into contact with threaded bores formed on the casing 3. The bores allow the passage of fixing members 10, such as screws, cooperating with the threaded bores. of the casing 3, so as to secure the pressurizing device 1 to the casing 3.
[0045] La bride de fixation 8 présente une forme particulière. En effet, la bride de fixation 8 comporte une première portion longeant une partie de la périphérie du bâti 5 et une seconde portion, en berceau, sensiblement circulaire dont le centre correspond au centre de rotation C du pignon de sortie 4 de la prise de mouvement 2. La seconde portion de la bride de fixation 8 permet le passage du pignon de sortie 4 de la prise de mouvement 2 de sorte que le pignon 7 coopère directement avec le pignon de sortie 4. [0046] Par ailleurs, la bride de fixation 8 est également équipée de moyens de centrage et de positionnement par rapport au carter 3. Ces moyens de centrage et de positionnement assurent un accouplement dynamique précis entre la prise de mouvement 2 et le dispositif de mise sous pression 1.The fastening flange 8 has a particular shape. Indeed, the fastening flange 8 comprises a first portion along a portion of the periphery of the frame 5 and a second portion, cradle, substantially circular whose center corresponds to the center of rotation C of the output gear 4 of the power take-off 2. The second portion of the fastening flange 8 allows the output gear 4 of the power take-off 2 to pass so that the pinion 7 cooperates directly with the output pinion 4. Furthermore, the fastening flange 8 is also equipped with centering and positioning means relative to the casing 3. These centering and positioning means provide a precise dynamic coupling between the power take-off 2 and the setting device. under pressure 1.
[0047] Dans le mode de réalisation représenté sur les figures 2 et 3, les moyens de centrage et de positionnement comportent des cavités 9 destinées à recevoir des pions de formes complémentaires, formées sur le carter 3. Bien évidemment, dans un mode de réalisation équivalent, les cavités 9 pourront être formées dans le carter 3 alors que les pions de formes complémentaires sont portés par la bride de fixation 8. En outre, on notera que les pions devront présenter une longueur et une résistance mécanique suffisantes pour permettre le support du dispositif.In the embodiment shown in Figures 2 and 3, the centering and positioning means comprise cavities 9 for receiving pins of complementary shapes, formed on the housing 3. Of course, in one embodiment equivalent, the cavities 9 can be formed in the housing 3 while the pins of complementary shapes are carried by the fastening flange 8. In addition, it should be noted that the pins must have a length and strength sufficient to allow the support of the device.
[0048] On remarque également, sur la figure 3, que les moyens de centrage et de positionnement ne comporteront avantageusement que deux cavités 9 et que la droite d passant par ces deux cavités passe également par le centre C de rotation du pignon de sortie 4 de la prise de mouvement 2. Ainsi, le positionnement du dispositif 1 par rapport à la prise de mouvement 2 est assuré de manière précise en limitant le nombre de cavités 9 utilisés.We also note, in Figure 3, that the centering and positioning means will advantageously comprise only two cavities 9 and that the line passing through these two cavities also passes through the center C of rotation of the output pinion 4 of the power take-off 2. Thus, the positioning of the device 1 with respect to the power take-off 2 is ensured in a precise manner by limiting the number of cavities 9 used.
[0049] Par ailleurs, les pions de positionnement pourront indifféremment être de forme cylindrique, de forme conique ou plus généralement de toute forme appropriée.Furthermore, the positioning pins may be indifferently cylindrical in shape, conical or more generally any suitable shape.
[0050] Dans un autre mode de réalisation, représenté sur la figure 4, la bride de fixation 8 comporte une structure d'emboîtement femelle 18, ou mâle, destinée à recevoir une structure d'emboîtement conjuguée formée sur la bride de fixation 13 du carter de la prise de mouvement 2.In another embodiment, shown in Figure 4, the fastening flange 8 comprises a female interlocking structure 18, or male, intended to receive a conjugate interlocking structure formed on the fastening flange 13 of the casing of the power take - off 2.
[0051] Par ailleurs, dans certains cas, les organes tournant du compresseur peuvent nécessiter une lubrification forcée. Aussi, dans un mode de réalisation avantageux, le dispositif de mise sous pression 1 comprend un circuit interne de lubrification et des moyens de raccordement du circuit interne à un circuit de lubrification du véhicule automobile. Dans ce cas, on raccorde le circuit interne du dispositif 1 à un circuit de lubrification du véhicule, situé dans la prise de mouvement par exemple, et comportant un réservoir et une pompe pour assurer la circulation du lubrifiant vers le circuit interne du dispositif 1.Moreover, in some cases, the rotating members of the compressor may require forced lubrication. Also, in an advantageous embodiment, the pressurizing device 1 comprises an internal lubrication circuit and means for connecting the internal circuit to a circuit of lubrication of the motor vehicle. In this case, the internal circuit of the device 1 is connected to a vehicle lubrication circuit located in the power take-off, for example, and comprising a reservoir and a pump for circulating the lubricant towards the internal circuit of the device 1.
[0052] Les figures 5 à 8 illustrent de façon détaillée le circuit interne de lubrification.Figures 5 to 8 illustrate in detail the internal lubrication circuit.
[0053] Le circuit de lubrification du véhicule automobile est ici acheminé vers le dispositif via l'arbre de support du pignon de sortie 4, non représenté, dont l'alésage intérieur forme un conduit d'acheminement du lubrifiant. L'extrémité de l'arbre de support du pignon de sortie 4 est introduite dans un orifice d'alimentation 19 du dispositif s'étendant selon l'axe C de rotation du pignon de sortie 4. Afin d'assurer le positionnement précis de l'orifice d'alimentation 19 par rapport à l'arbre de support du pignon de sortie 4, les pions de positionnement formés sur le carter 3, présentent une longueur suffisante pour permettre le positionnement du dispositif 1 par rapport à la prise de mouvement 2 avant l'introduction de l'extrémité de l'arbre dans l'orifice d'alimentation 19.The lubrication circuit of the motor vehicle is here fed to the device via the output pinion support shaft 4, not shown, the inner bore forms a lubricant routing conduit. The end of the output pinion support shaft 4 is introduced into a supply port 19 of the device extending along the axis C of rotation of the output pinion 4. In order to ensure the precise positioning of the supply port 19 relative to the output pinion support shaft 4, the positioning pins formed on the housing 3, have a length sufficient to allow the positioning of the device 1 relative to the power take-off 2 before introducing the end of the shaft into the feed port 19.
[0054] Le lubrifiant est ensuite acheminé de l'orifice d'alimentation 19 vers un filtre 21 à lubrifiant au moyen d'un premier canal 20, représenté sur la figure 6. À la sortie du filtre 21 , le lubrifiant purifié est ensuite acheminé vers les roulements 22a, 22b des arbres 6a, 6b via un second conduit 23, représenté sur les figures 7 et 8. Les armatures 23a, 23b de support des roulements, présentent des fentes 24a, 24b de passages du lubrifiant. Le lubrifiant redescend alors par gravité vers le fond du châssis 5. Par la suite, le lubrifiant pourra être collecté au moyen d'un dispositif de pompage porté, par exemple, par la prise de mouvement.The lubricant is then conveyed from the supply port 19 to a lubricant filter 21 by means of a first channel 20, shown in FIG. 6. At the outlet of the filter 21, the purified lubricant is then conveyed to the bearings 22a, 22b of the shafts 6a, 6b via a second duct 23, shown in FIGS. 7 and 8. The bearing armatures 23a, 23b, have slots 24a, 24b of passages for the lubricant. The lubricant then descends by gravity to the bottom of the frame 5. Thereafter, the lubricant can be collected by means of a pumping device carried, for example, by the power take-off.
[0055] Avantageusement, le dispositif 1 de mise sous-pression du fluide présente une masse et des dimensions agencées de sorte que les efforts appliqués par le dispositif, associé à la prise de mouvement, soient inférieurs aux charges admissibles à la jonction de la prise de mouvement sur la boîte de vitesse. Pour ce faire, les dimensions ainsi que l'épaisseur des parois du bâti sont optimisés. En outre, afin de diminuer le volume de la chambre de compression et donc du bâti 5, on prévoit d'entraîner les vis de compression à des vitesses de rotation importantes. Pour ce faire, le pignon d'accouplement 7 et/ou la pignon de sortie 4 de la prise de mouvement 2 sont adaptés pour entraîner les arbres mobiles à des vitesses de l'ordre de 10 000 à 20 000 tours par minute.Advantageously, the fluid pressure device 1 has a mass and dimensions arranged so that the forces applied by the device associated with the power take-off are less than the allowable loads at the junction of the socket. of movement on the gearbox. To do this, the dimensions and the thickness of the walls of the frame are optimized. In in addition, in order to reduce the volume of the compression chamber and therefore the frame 5, it is intended to drive the compression screws at high speeds of rotation. To do this, the coupling gear 7 and / or the output gear 4 of the power take-off 2 are adapted to drive the movable shafts at speeds of the order of 10,000 to 20,000 revolutions per minute.
[0056] Les figures 10 et 11 illustrent un second mode de réalisation de l'invention.Figures 10 and 11 illustrate a second embodiment of the invention.
[0057] Comme dans le mode de réalisation précédent, le dispositif 1 comporte un bâti 5, supportant deux arbres 6a, 6b mobiles en rotation selon des sens de rotation opposés, des moyens de synchronisation et un pignon 7 amovible apte à être monté alternativement sur le premier 6a ou le second arbre 6b en fonction du sens de rotation de ladite prise de mouvement 2.As in the previous embodiment, the device 1 comprises a frame 5, supporting two shafts 6a, 6b rotatable in opposite directions of rotation, synchronization means and a removable pinion 7 adapted to be mounted alternately on the first 6a or the second shaft 6b according to the direction of rotation of said power take-off 2.
[0058] Toutefois, dans ce mode de réalisation, contrairement au premier aspect de l'invention, le dispositif 1 comporte un dispositif de multiplication de la vitesse de rotation, composé d'une succession d'engrenages 26, 27, 28 dont les tailles sont adaptées afin d'obtenir le rapport de multiplication désiré.However, in this embodiment, unlike the first aspect of the invention, the device 1 comprises a device for multiplying the speed of rotation, composed of a succession of gears 26, 27, 28 whose sizes are adapted to obtain the desired multiplication ratio.
[0059] Par ailleurs, le dispositif comporte un arbre cannelé 25, illustré sur la figure 10, destiné à être engagé dans un manchon rotatif de la prise de mouvement. En outre, le dispositif comporte une bride de fixation 26 destinée à venir se fixer sur le carter 3 de la prise de mouvement 2.Furthermore, the device comprises a splined shaft 25, shown in Figure 10, intended to be engaged in a rotary sleeve of the power take-off. In addition, the device comprises a fastening flange 26 intended to be fixed on the casing 3 of the power take-off 2.
[0060] Ce dispositif 1 est adaptable aux différentes boîtes de vitesse et prise de mouvement du marché. On notera toutefois que le dispositif obtenu selon le second mode de réalisation est plus encombrant et lourd que celui qui pourra être obtenu conformément au premier mode de réalisation. Néanmoins, ce mode de réalisation pourra convenir aux solutions nécessitant de faible puissance de compression, dont le poids et la taille restent mesurée.This device 1 is adaptable to different gearboxes and market power take-off. Note however that the device obtained according to the second embodiment is more bulky and heavy than that which can be obtained according to the first embodiment. Nevertheless, this embodiment may be suitable for solutions requiring low compression power, whose weight and size remain measured.
[0061] L'invention est décrite dans ce qui précède à titre d'exemple. Il est entendu que l'homme du métier est à même de réaliser différentes variantes de réalisation de l'invention sans pour autant sortir du cadre de l'invention. The invention is described in the foregoing by way of example. It is understood that the skilled person is able to achieve different embodiments of the invention without departing from the scope of the invention.

Claims

REVENDICATIONS
1. Dispositif (1) de mise sous pression d'un fluide, destiné à être associé à une prise de mouvement (2) rotatif d'un véhicule automobile comprenant un carter (3) et au moins un étage de multiplication (4), ledit dispositif comportant un bâti (5) supportant au moins un premier arbre (6a, 6b) mobile en rotation portant un organe pour la mise en mouvement du fluide et des moyens d'accouplement dynamique (7) de l'arbre (6a, 6b) à la prise de mouvement (2), ledit dispositif étant caractérisé en ce que le bâti (5) comprend des moyens de support et de fixation au carter (3) et en ce que lesdits moyens d'accouplement (7) sont agencés pour raccorder directement l'arbre mobile (6a, 6b) à l'étage de multiplication (4) de la prise de mouvement.1. Device (1) for pressurizing a fluid, intended to be associated with a rotary power take-off (2) of a motor vehicle comprising a casing (3) and at least one multiplication stage (4), said device comprising a frame (5) supporting at least a first rotatable shaft (6a, 6b) carrying a member for moving the fluid and dynamic coupling means (7) of the shaft (6a, 6b ) to the power take-off (2), said device being characterized in that the frame (5) comprises means for supporting and fixing to the casing (3) and in that said coupling means (7) are arranged for directly connect the moving shaft (6a, 6b) to the multiplication stage (4) of the power take-off.
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il ne comprend pas d'étage de multiplication, autre que celui de la prise de mouvement.2. Device according to claim 1, characterized in that it does not include a multiplication stage, other than that of the power take-off.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens d'accouplement comprennent un pignon (7) porté par le premier arbre (6a, 6b) mobile.3. Device according to claim 1 or 2, characterized in that the coupling means comprise a pinion (7) carried by the first shaft (6a, 6b) movable.
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens de fixation comportent une bride de fixation périphérique (8), destinée à être disposée contre le carter (3) de la prise de mouvement (2).4. Device according to any one of claims 1 to 3, characterized in that the fastening means comprise a peripheral fastening flange (8) intended to be arranged against the housing (3) of the power take-off (2). .
5. Dispositif selon la revendication 4, caractérisé en ce que la bride de fixation comporte une portion en forme de berceau de sorte à permettre le passage de l'étage de multiplication (4) de la prise de mouvement.5. Device according to claim 4, characterized in that the fixing flange comprises a cradle-shaped portion so as to allow the passage of the multiplication stage (4) of the power take-off.
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de fixation comportent des moyens de centrage et de positionnement. 6. Device according to one of claims 1 to 5, characterized in that the fixing means comprise centering and positioning means.
7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'il comprend un circuit interne de lubrification et des moyens de raccordement du circuit interne à un circuit de lubrification du véhicule automobile.7. Device according to one of claims 1 to 6, characterized in that it comprises an internal lubrication circuit and means for connecting the internal circuit to a lubrication circuit of the motor vehicle.
8. Dispositif selon la revendication 7, caractérisé en ce que les moyens de raccordement comportent un orifice d'alimentation (19) s'étendant dans l'axe de rotation C de l'étage de multiplication (4) de la prise de mouvement (2) de sorte à permettre une amenée du lubrifiant par l'arbre de support dudit étage de multiplication (4).8. Device according to claim 7, characterized in that the connection means comprise a supply port (19) extending in the axis of rotation C of the multiplication stage (4) of the power take-off ( 2) so as to allow a supply of the lubricant by the support shaft of said multiplication stage (4).
9. Dispositif selon l'une des revendications 7 et 8, caractérisé en ce que le circuit interne de lubrification comporte un filtre (21 ).9. Device according to one of claims 7 and 8, characterized in that the internal lubrication circuit comprises a filter (21).
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce qu'il présente une masse et des dimensions agencées de sorte que les efforts appliqués par le dispositif, associé à la prise de mouvement, soient inférieurs aux charges admissibles à la jonction de la prise de mouvement sur une boîte de vitesse.10. Device according to one of claims 1 to 9, characterized in that it has a mass and dimensions arranged so that the forces applied by the device associated with the power take-off, are less than the allowable loads to the junction of the power take-off on a gearbox.
11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il comporte un premier (6a) et un second (6b) arbres mobiles, parallèles, portant respectivement une première et une seconde vis de compression et des moyens synchronisation de la rotation des arbres.11. Device according to any one of claims 1 to 10, characterized in that it comprises a first (6a) and a second (6b) movable shafts, parallel, respectively carrying a first and a second compression screw and means synchronization of the rotation of the trees.
12. Dispositif selon la revendication 11 , caractérisé en ce que les moyens de synchronisation comportent une première (11a) et une seconde (11b) roue d'engrenage portées respectivement par le premier (6a) et le second arbre (6b) et coopérant l'une avec l'autre.12. Device according to claim 11, characterized in that the synchronization means comprise a first (11a) and a second (11b) gear wheel carried respectively by the first (6a) and the second shaft (6b) and co-operating with the with each other.
13. Dispositif selon l'une des revendications 11 et 12, caractérisé en ce que le pignon (7) formant moyen d'accouplement peut être supporté alternativement par le premier (6a) ou le second (6b) arbre et en ce que le second (6b) comme le premier arbre (6a) est agencé de sorte à être accouplé directement à l'étage de multiplication (4) de la prise de mouvement (2) lorsqu'il porte ledit pignon (7).13. Device according to one of claims 11 and 12, characterized in that the pinion (7) forming a coupling means may be supported alternately by the first (6a) or the second (6b) shaft and in that the second (6b) as the first shaft (6a) is arranged to be coupled directly to the multiplication stage (4) of the movement (2) when carrying said pinion (7).
14. Dispositif (1) de mise sous pression d'un fluide, destiné à être associé à une prise de mouvement (2) rotatif d'un véhicule automobile comprenant un carter (3), ledit dispositif comportant un bâti (5), un premier et un second arbres (6a, 6b) mobiles en rotation portant chacun un organe pour la mise en mouvement du fluide, des moyens de synchronisation de la rotation des premier et second arbres agencés pour entraîner le premier arbre (6a) selon un premier sens de rotation et le second arbre (6b) selon un second sens de rotation ; et des moyens d'accouplement dynamique du premier ou du second arbre (6a, 6b) à la prise de mouvement (2), ledit dispositif étant caractérisé en ce que lesdits moyens d'accouplement (7) comportent un pignon (7) amovible apte à être monté soit sur le premier (6a) soit sur le second arbre (6a), en fonction du sens de rotation de ladite prise de mouvement, de sorte à entraîner le premier arbre selon le premier sens de rotation et le second arbre selon le second sens de rotation et, cela, indépendamment du sens de rotation de ladite prise de mouvement (2).14. Device (1) for pressurizing a fluid, intended to be associated with a rotary power take-off (2) of a motor vehicle comprising a housing (3), said device comprising a frame (5), a first and second rotationally movable shafts (6a, 6b) each carrying a member for moving the fluid, means for synchronizing the rotation of the first and second shafts arranged to drive the first shaft (6a) in a first direction rotating and the second shaft (6b) in a second direction of rotation; and means for dynamic coupling of the first or second shaft (6a, 6b) to the power take-off (2), said device being characterized in that said coupling means (7) comprise a detachable pinion (7) adapted to to be mounted either on the first (6a) or the second shaft (6a), depending on the direction of rotation of said power take-off, so as to drive the first shaft in the first direction of rotation and the second shaft in accordance with the second direction of rotation and this independently of the direction of rotation of said power take-off (2).
15. Dispositif selon la revendication 14, destiné à être associé à une prise de mouvement (2) pourvue d'au moins un étage de multiplication (4), caractérisé en ce que lesdits moyens d'accouplement (7) sont agencés pour raccorder directement l'arbre mobile (6a, 6b) à l'étage de multiplication (4) de la prise de mouvement.15. Device according to claim 14, intended to be associated with a power take-off (2) provided with at least one multiplication stage (4), characterized in that said coupling means (7) are arranged to connect directly the movable shaft (6a, 6b) at the multiplication stage (4) of the power take-off.
16. Dispositif selon la revendication 14 ou 15, caractérisé en ce le bâti (5) comprend des moyens de support et de fixation au carter (3).16. Device according to claim 14 or 15, characterized in that the frame (5) comprises means for supporting and fixing the housing (3).
17. Dispositif selon l'un des revendications 14 à 16, caractérisé en en ce que les moyens de fixation comportent une bride de fixation périphérique (8), destinée à être disposée contre le carter (3) de la prise de mouvement (2).17. Device according to one of claims 14 to 16, characterized in that the fastening means comprise a peripheral fastening flange (8) intended to be arranged against the housing (3) of the power take-off (2). .
18. Dispositif selon la revendication 17, caractérisé en ce que la bride de fixation comporte une portion en forme de berceau de sorte à permettre le passage de l'étage de multiplication (4) de la prise de mouvement.18. Device according to claim 17, characterized in that the fixing flange comprises a cradle-shaped portion so as to allow the passage of the multiplication stage (4) of the power take-off.
19. Dispositif selon l'une des revendications 16 à 18, caractérisé en ce que les moyens de fixation comportent des moyens de centrage et de positionnement.19. Device according to one of claims 16 to 18, characterized in that the fixing means comprise centering and positioning means.
20. Dispositif selon l'une des revendications 1 à 19, caractérisé en ce qu'il comprend un circuit interne de lubrification et des moyens de raccordement du circuit interne à un circuit de lubrification du véhicule automobile.20. Device according to one of claims 1 to 19, characterized in that it comprises an internal lubrication circuit and means for connecting the internal circuit to a lubrication circuit of the motor vehicle.
21. Dispositif selon l'une des revendications 14 à 20, caractérisé en ce que les moyens de synchronisation comportent une première (11a) et une seconde (11 b) roue d'engrenage portées respectivement par le premier (6a) et le second arbre (6b) et coopérant l'une avec l'autre.21. Device according to one of claims 14 to 20, characterized in that the synchronization means comprise a first (11a) and a second (11b) gear wheel carried respectively by the first (6a) and the second shaft (6b) and cooperating with each other.
22. Dispositif selon l'une des revendications 1 à 21 , caractérisé en ce que les moyens de synchronisation présentent un rapport de multiplication de l'ordre de 1 ,2.22. Device according to one of claims 1 to 21, characterized in that the synchronization means have a multiplication ratio of the order of 1, 2.
23. Système comportant une prise de mouvement (2) rotatif comprenant un carter (3) et un dispositif de mise sous pression d'un fluide selon l'une des revendications 1 à 22, associé audit carter (3). 23. System comprising a rotary power take-off (2) comprising a casing (3) and a device for pressurizing a fluid according to one of claims 1 to 22, associated with said casing (3).
EP08875637A 2008-12-19 2008-12-19 Device for pressurising a fluid, to be directly mounted on a power takeoff Withdrawn EP2367701A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2008/001808 WO2010070211A1 (en) 2008-12-19 2008-12-19 Device for pressurising a fluid, to be directly mounted on a power takeoff

Publications (1)

Publication Number Publication Date
EP2367701A1 true EP2367701A1 (en) 2011-09-28

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Application Number Title Priority Date Filing Date
EP08875637A Withdrawn EP2367701A1 (en) 2008-12-19 2008-12-19 Device for pressurising a fluid, to be directly mounted on a power takeoff

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US (1) US20110293444A1 (en)
EP (1) EP2367701A1 (en)
CN (1) CN102256824B (en)
CA (1) CA2740996C (en)
WO (1) WO2010070211A1 (en)

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Also Published As

Publication number Publication date
CA2740996C (en) 2016-02-16
CN102256824B (en) 2015-04-22
CN102256824A (en) 2011-11-23
WO2010070211A1 (en) 2010-06-24
CA2740996A1 (en) 2010-06-24
US20110293444A1 (en) 2011-12-01

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