Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C3/00—Shafts; Axles; Cranks; Eccentrics
  • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
  • F16C3/20—Shape of crankshafts or eccentric-shafts having regard to balancing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
  • F16F15/264—Rotating balancer shafts
• • 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
  • F02B77/00—Component parts, details or accessories, not otherwise provided for
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C3/00—Shafts; Axles; Cranks; Eccentrics
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/22—Compensation of inertia forces
  • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system

Definitions

• the invention relates to a heat engine for a motor vehicle.
• the invention relates more particularly to a heat engine, especially for a motor vehicle, of the type which comprises at least one engine block receiving in rotation a crankshaft and a cassette attached to the engine block which receives in rotation a pair of parallel balancing shafts.
• primary and secondary which are unbalanced and which are rotated by the crankshaft, of the type in which a crankshaft rotationally integral ring meshes permanently with a first pinion carried by one end of the primary balancing shaft, and of the type in which a second pinion carried by the end of the primary balancer shaft meshes with a pinion carried by one end of the secondary balancer shaft.
• the document EP-A1-1,445,509 describes and represents a motor in which the cassette comprises an intermediate shaft for driving the balance shafts, which shaft is itself driven by a camshaft of the motor via a toothed belt.
• the end of the intermediate shaft comprises two asymmetrical flats forming polarizers which allow to put in position the intermediate shaft with the aid of a correct key before assembly.
• the invention proposes an arrangement, in which the prior positioning of the shafts balancing is achieved by a reusable removable pin which is interposed between the two balancing shafts.
• the invention proposes a motor of the type described above, characterized in that the ends of the primary and secondary balancing shafts are traversed by transverse holes which are intended, prior to the mounting of the balancing cassette on the motor block, to be aligned with each other in a predetermined position of the primary and secondary balancing shafts to receive a removable holding member.
• the detachable holding element comprises means for interlocking on one end of one of the balancing shafts
• the removable holding element consists of a pin
• the pin comprises a first rectilinear strand, intended to pass through the bores, which is connected by means of a gripping loop to a second strand which comprises at least one curved portion complementary to the periphery of the end of the bead; a balancing shaft for forming the interlocking means, and the pin is made of an elastic material, to allow the pin to fit on said end,
• the pin is made from a stainless steel wire so that it can be reused.
• the invention also relates to a method for mounting a balancing cassette of the type described above, characterized in that it comprises at least:
• FIG. 2 is a partial side view of the heat engine of FIG. 1;
• FIG. 3 is a partial front detail view of the heat engine of FIG. 1.
• the figures show in part a heat engine 1 0 intended in particular to equip a motor vehicle.
• the motor 10 comprises at least one engine block (not shown) receiving in rotation a crankshaft
• one end carries a hub 14 which is intended to receive a flywheel and a clutch mechanism (not shown) of the vehicle.
• the motor 10 comprises a cassette 16 called “balancing" which is fixed to the engine block by means of screws 1 8 which are received in bores (not shown) of the engine block.
• the cassette 16 is for example made by a foundry process and it comprises bearings 20, made by assembling two yokes 22 and 24, which receive in rotation a pair of primary parallel balancing shafts 26 and secondary 28.
• Each primary or secondary shaft 28 is provided with associated unbalances 30, 32 which are intended to allow the vibrational balancing of the engine 1 0, and they are rotated by the crankshaft 12.
• a ring gear 34 integral with rotation of the crankshaft 12 meshes permanently with a first pinion 36 which is carried by an end 38 of the primary balancer shaft 26, and a second pinion 40 carried by the end 38 of the primary balancing shaft 26 engages with a pinion 42 carried by an end 44 of the balancer shaft 28.
• the ends 38, 44 of the primary balancing shafts 26 and secondary 28 are traversed by respective transverse bores 46, 48 which are intended, prior to the mounting of the cassette 1 6 on the engine block, to be aligned with each other to receive a removable holding member 50 which is intended for:
• the removable holding member 50 comprises means 52 for fitting on one end of one of the balancing shafts. More particularly, the removable holding member 50 consists of a pin 50 which comprises a first rectilinear strand 54 which is intended to pass through the bores 46, 48 and which is connected by means of a gripping loop 56 to a second strand 58 which comprises at least one curved portion 62 complementary to the periphery of the end of a balancing shaft to form the interlocking means 52.
• the second strand 58 has a curved portion 62 complementary to the periphery of the end 44 of the secondary balancing shaft 28, but this provision is not limiting of the invention and the portion 62 could cooperate with the end 38 of the balancing primary shaft 26 without changing the nature of the invention.
• the hairpin In the preferred embodiment of the invention, the hairpin
• the pin 50 is made of an elastic material, to allow the pin 50 to be interlocked on the end 44 of the secondary balancing shaft 28.
• the pin 50 is made from a stainless steel wire so that it can be reused several times.
• a balancing cassette 1 6 of the type described above can be mounted according to a mounting method which comprises at least a first step during which the pin constituting the holding element 50 is inserted into the transverse bores. 46, 48 of the ends 38, 44 of the primary shafts 26 and secondary 28.
• the method also comprises a second step during which the ring gear 34 is secured in rotation with the crankshaft 12 in a determined angular position.
• This setting may, by way of example and without limitation of the invention, be carried out directly by a setting of the crankshaft 12 of the engine in a position associated with a top dead center position or low dead point of one of the engine pistons.
• the method also comprises a third step in which the balancing cassette 1 6 is fixed to the engine block.
• the method comprises a fourth step during which the holding element 50 is removed from the transverse bores 46, 48 of the ends 38, 44 of the primary 26 and secondary 28 shafts.
• the invention thus makes it possible in a simple and efficient manner to prepare a cassette 16 carrying balancing shafts 26, 28 before it is mounted.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
• General Details Of Gearings (AREA)
• Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35530772

Family Applications (1)

Country Status (8)

Families Citing this family (10)

Family Cites Families (12)

• 2005
  • 2005-05-12 FR FR0504769A patent/FR2885661B1/fr not_active Expired - Fee Related
• 2006
  • 2006-05-12 WO PCT/FR2006/050436 patent/WO2007003812A2/fr active Application Filing
  • 2006-05-12 CN CN2006800159596A patent/CN101171439B/zh not_active Expired - Fee Related
  • 2006-05-12 EP EP06794421A patent/EP1882113A2/de not_active Withdrawn
  • 2006-05-12 KR KR1020077025275A patent/KR101203305B1/ko not_active IP Right Cessation
  • 2006-05-12 RU RU2007146148/11A patent/RU2400656C2/ru not_active IP Right Cessation
  • 2006-05-12 JP JP2008510623A patent/JP4744598B2/ja not_active Expired - Fee Related
  • 2006-05-12 US US11/914,319 patent/US7921825B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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