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
  • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
  • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
  • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
  • F04C29/0071—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
  • F01L1/047—Camshafts
  • F01L1/053—Camshafts overhead type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
  • F01L1/047—Camshafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
  • F01M9/10—Lubrication of valve gear or auxiliaries
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
  • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
• • 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
  • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
  • F04C29/02—Lubrication; Lubricant separation
  • F04C29/023—Lubricant distribution through a hollow driving shaft
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
  • F01L1/047—Camshafts
  • F01L2001/0475—Hollow camshafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
  • F01M9/10—Lubrication of valve gear or auxiliaries
  • F01M9/108—Lubrication of valve gear or auxiliaries of auxiliaries
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
  • F02B63/06—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for pumps
• • 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
  • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
  • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
  • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
  • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
• • 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
  • F04C2220/00—Application
  • F04C2220/10—Vacuum
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/1836—Rotary to rotary

Definitions

• Device for coupling a vacuum pump with a camshaft comprising means for supplying lubricating fluid.
• the present invention relates to a device for coupling a vacuum pump with an internal combustion engine camshaft for a motor vehicle for the purpose of rotating said vacuum pump.
• An internal combustion engine camshaft may be subjected to more or less resistant torques during operation of the engine.
• a coupling is generally required to effectively transmit the engine torque provided by a crankshaft of the engine to the camshaft.
• This coupling, or another coupling can also be used to control a pump, especially a vacuum pump.
• the braking assistance is provided by a brake booster connected to a vacuum pump which is rotated by the engine, for example by means of a motor.
• a coupling device attached to one end of the engine camshaft in this regard, reference may be made to the WO document
• Said device comprises a body inside which is formed a stage bore receiving the end of the camshaft and allowing the passage of a screw adapted to bear against a portion of said body so as to ensure the fixing of the device on the camshaft.
• the body also includes radial grooves cooperating with tenons of the vacuum pump for transmitting the torque to said pump.
• the bore of the body is shaped to allow fluid communication between the camshaft and the vacuum pump to lubricate the pump with a lubricating fluid used for the engine.
• this device causes a difficult assembly, it includes a body of relatively complex and expensive form, which may be incompatible with mass industrialization.
• the present invention therefore aims to overcome these disadvantages, by providing a coupling device of a vacuum pump with an internal combustion engine camshaft particularly easy to assemble, economical, reliable.
• the present invention also aims to provide a coupling device of a vacuum pump with a camshaft which can be coupled to said camshaft after wedging thereof.
• the subject of the invention is a device for coupling a vacuum pump with a tubular camshaft of an internal combustion engine for a motor vehicle, comprising a nozzle provided with first and second coaxial portions delimiting an annular space. within which is mounted one end of the camshaft, at least one of said portions being adapted to transmit torque to the camshaft, and means for transmitting said torque to the pump.
• Said second axial portion is provided with a housing extending along said axis and intended to receive a means of sampling the pump capable of taking a lubricating fluid conveyed inside the camshaft so as to ensure fluidic communication between the camshaft and the pump.
• the device has the advantage of comprising a single end piece allowing not only the transmission of a torque to the shaft and the vacuum pump, but also the fluid supply of said pump via the camshaft, in a particularly simple and economical way, while freeing from mounting constraints. expensive and complex.
• the first portion comprises a bore inside which is fitted the end of the camshaft.
• first and second portions are interconnected by a radial end wall.
• Such an arrangement makes it possible to obtain a sealed end piece substantially limiting any leakage to the outside of the lubricating fluid present inside the camshaft.
• the first and second portions and the end wall are monobloc, which allows to obtain an economical device, easy to assemble and transport.
• the annular space may have a radial dimension substantially greater than the thickness of the camshaft.
• the tip further comprises at least one radial flange portion extending outwardly from the first portion and adapted to receive a driving torque from the camshaft.
• the torque transmission means to the pump comprise radial groove formed at the tip.
• the device further comprises a flange secured to the camshaft, a pairing pinion mounted on said end flange, a chain sprocket attached to said pairing gear, the hub being mounted directly or indirectly on the spindle. chain sprocket.
• the housing of the second axial portion consists of a bore.
• FIG 1 is a schematic sectional view of a coupling device according to the invention mounted on a camshaft and driving a vacuum pump;
• FIG 2 is a perspective view of the device of Figure 1;
• FIGS. 3 and 4 are perspective views of a tip of the device of FIG.
• FIGS 1 and 2 show a camshaft 1 provided with a device according to the invention, designated by the general numerical reference 2, and allowing the coupling of a vacuum pump 3 with said shaft 1
• the camshaft 1 has been partially illustrated. Note, however, that it consists essentially of a tube 4 externally carrying a set of cams 5, as is known per se.
• the coupling device 2 comprises a tip 6 made in one piece and provided with a first annular portion 7, forming a sleeve coaxial with the shaft 1, and secured to one end of the tube 4.
• the first portion 7 is extended axially in the direction of the vacuum pump 3, by a radial end wall 8, which extends axially itself, on the opposite side to said pump 3, by a second axial portion 9 essentially cylindrical.
• the second portion 9 here comprises a front radial surface 9a substantially axially offset with respect to a front radial surface 7a of the first portion 7, in the direction of the radial wall 8.
• the first and second portions 7, 9 are coaxial and define an annular space 8a inside which the end of the tube 4 is mounted.
• the annular space 8a here has a radial dimension substantially greater than the thickness of the shaft. 1 to cams, so as to leave a slight radial space between a bore of said shaft and the second portion 9 to facilitate the fitting of the first portion 7 on the shaft 1, during assembly of the nozzle 6.
• the end piece 6 also comprises radial portions forming flanges, here three in number and referenced 10 to 12, extending radially outwardly from the first portion 7 and able to receive a driving torque.
• the flanges 10 to 12 are here uniformly distributed over the circumference of the first portion 7 and respectively comprise bores 10a to 12a allowing the passage of fastening screws (not shown) for the transmission of the engine torque.
• the transmittable torque is a function of the length of the first portion 7, its thickness as well as its limit at break.
• the nozzle 6 comprises a radial groove 13 formed at the radial end wall 8 and cooperating with lugs 15 and 16 of the pump 3, of complementary shape, arranged to one of its axial ends.
• the tip 6 also comprises a housing 17 formed here in the form of a bore passing right through the second portion 9, and which opens at a front surface of the radial wall 8.
• the housing 17 is coaxial with the camshaft 1.
• a sampling means 18 of said pump is mounted inside said housing 17.
• the sampling means 18 comprises a tubular pipette 19 coaxial with the shaft 1 and mounted partly inside a bore
• the pipette 19 is projecting with respect to an end surface of said pump 3, and provided, near its axial end, an annular lip 20 in contact with the housing 17 of in order to achieve a good seal between the nozzle 6 and said pipette 19 to substantially reduce the risk of leakage to the outside of the lubricating fluid.
• the pipette 19 thus makes it possible to supply lubricating fluid to the supply channels 21 of the pump 3 for its lubrication.
• the nozzle 6 is thus not only intended to receive a driving torque, to transmit it to the camshaft 1 as well as to the pump
• the coupling device 2 also comprises a drive member 22 here provided with a flange 23 fixed on the camshaft 1 near its axial end, with a pairing pinion 24. disposed on said flange 23, a chain sprocket 25 attached to said pairing gear, axially on the opposite side to the flange 23, and a fixing spacer 26 mounted axially between the chain gear 25 and the front radial surface 9a of the end piece 6.
• a first step is to fix the flange 23 on the camshaft 1, for example by welding, by shrinking, or by gluing. Then, the pairing pinion 24, the chain pinion 25, and the spacer 26 are put in place, by means of fixing screws (not shown), on the flange 23, without tightening the said screws. The crankshaft of the engine and the camshaft 1 are then locked in rotation, and a distribution chain mounted on the pinion 25 is tensioned. Depending on the tension of said chain, the pinions 24 and 25 pivot slightly with respect to the 1 camshaft through oblong holes (not shown) formed on said pinion. Finally, the sprockets 24, 25 and the spacer are immobilized

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Applications Or Details Of Rotary Compressors (AREA)
• Valve-Gear Or Valve Arrangements (AREA)
• Lubrication Of Internal Combustion Engines (AREA)
• Rotary Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35539613

Family Applications (1)

Country Status (8)

Families Citing this family (9)

Family Cites Families (6)

• 2005
  • 2005-06-03 FR FR0505613A patent/FR2886696B1/fr not_active Expired - Fee Related
• 2006
  • 2006-05-24 US US11/915,587 patent/US20080196522A1/en not_active Abandoned
  • 2006-05-24 RU RU2007149000/06A patent/RU2007149000A/ru not_active Application Discontinuation
  • 2006-05-24 EP EP06794455A patent/EP1891305A2/de not_active Withdrawn
  • 2006-05-24 WO PCT/FR2006/050474 patent/WO2007003819A2/fr active Application Filing
  • 2006-05-24 KR KR1020077024832A patent/KR20080014755A/ko not_active Application Discontinuation
  • 2006-05-24 CN CNA2006800189375A patent/CN101184908A/zh active Pending
  • 2006-05-24 JP JP2008514161A patent/JP2008542615A/ja active Pending

Non-Patent Citations (1)

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