Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases
  • F02F7/0043—Arrangements of mechanical drive elements
  • F02F7/0048—Tunnel-type frames
• • 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
  • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
• • 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
  • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
  • F16C9/02—Crankshaft bearings

Definitions

• the invention relates to the bearing of the crankshaft of an internal combustion engine according to the preamble of the claim, as is known for example from DE-PS 35 45 700.
• crankshaft of an internal combustion engine is usually supported in several bearings in the crankcase.
• a flywheel is coupled to the crankshaft, which is seated on a crankshaft journal protruding from the crankcase.
• the arrangement of the flywheel mass on a freely projecting crankshaft journal causes support forces to be introduced into the crankshaft bearing, which is already highly loaded, and undesirable additional deformation of the crankshaft.
• DE-PS 35 45 700 has therefore already proposed to support the flywheel formed by coupling parts on both sides between two bearings.
• Both-sided support is provided on the one hand by the crankshaft bearing in the adjacent crankcase wall and on the other hand by a bush molded onto a clutch housing, which is connected to the crankcase and receives a bearing journal that starts from the side of the flywheel facing away from the crankcase.
• the weight forces originating from the flywheel are derived directly into the crankcase.
• the high weight and the large construction volume of the complex and expensive construction are disadvantageous.
• crankshaft of an internal combustion engine is connected to a vibration damper.
• the damper mass sits at the end of a slim connected to the crankshaft Torsionsstab ⁇ , which is supported in an additional bearing, which lies between the crankshaft bearing of the adjacent crankcase wall and the damper.
• this additional bearing is provided only because apparently sufficiently large torsion angles can only be achieved with a large length of the torsion bar, and " large deflections would occur with a long length of the slim torsion bar.
• the object of the invention is to provide the crankshaft in its already highly stressed sections with additional stress due to forces resulting from the weight of the flywheel and urid moments resulting therefrom as far as possible to keep clear and to show a simple and cheap design.
• crankshaft section is shown with the crankshaft journal 1 projecting beyond the crankcase.
• the crankshaft journal 1 is extended by a sleeve 2, which carries the flywheel.
• the crankshaft 9 is mounted in the crankcase in a plurality of crankshaft bearings, of which only the radial crankshaft bearing 3 and the radial crankshaft bearing 4 arranged in the crankcase wall and an axial bearing 5 are shown.
• Another radial outer bearing 6 is provided between the crankshaft bearing 4 arranged in the crankcase wall 10 and the flywheel designed as a cup-shaped flywheel 7, in which the crankshaft journal 1 is radially supported on its extension formed by the sleeve 2.
• the bearing bush is molded onto a housing part 8 which is connected to the crankcase wall 10.
• the flywheel 7 fastened to the sleeve 2 with screws is shaped in such a way that the axial center of gravity corresponds approximately to the axial position of the outer bearing 6. From a consideration of the external equilibrium it follows that the weight of the flywheel is completely introduced into the outer bearing 6 as the only bearing force. The assumption is that the bearings allow rotations with respect to an axis that is normal to the crankshaft axis. At the crankshaft bearings 3, 4 located in the crankcase, none act on the
• the flywheel is connected to an output, for example via an elastic intermediate coupling.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6385824

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (1)

Citations (1)

Family Cites Families (2)

• 1989
  • 1989-07-26 DE DE19893924645 patent/DE3924645C1/de not_active Expired - Lifetime
• 1990
  • 1990-07-04 WO PCT/DE1990/000501 patent/WO1991002177A1/de not_active Ceased

Patent Citations (1)

Non-Patent Citations (1)

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