Twin-flywheel apparatus for transmitting torque in the power train of motor vehicle

Apparatus for transmitting torque in a motor vehicle comprising a first rotary flywheel connectable with an output element of an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with an disconnectable from a transmission in the vehicle by a clutch, said first flywheel having a side facing toward said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• an axial protuberance provided on said first flywheel and of one piece with a substantially radially extending flange in axial abutment with said side of said first flywheel;
• and at least one roller bearing between said protuberance and said second flywheel, said first flywheel being connectable to the output element of the engine by fasteners having heads arranged to abut said flange.

Apparatus for transmitting torque in a motor vehicle comprising a first rotary flywheel connectable with an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with and disconnectable from a transmission of the vehicle by a clutch, said first flywheel having a side facing toward said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• an axial protuberance provided on said first flywheel;
• at least one roller bearing between said protuberance and said second flywheel;
• a substantially radially extending flange of one piece with said protuberance and axially adjacent said side at a centrally located portion of said first flywheel;
• and fasteners arranged to clamp the central portion of said first flywheel between said flange and the output element of the engine, said fasteners having heads arranged to abut said flange.

Apparatus for transmitting torque in a motor vehicle, comprising a first rotary flywheel connectable with an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with an input element of a transmission in the vehicle by a clutch, said first flywheel having a first side facing toward and a second side facing away from said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• at least one antifriction roller bearing between said flywheels, said flywheels defining an axial passage for a component and said at least one bearing surrounding said passage and having a radially innermost portion disposed at a first radial distance from the axes of said flywheels, one of said flywheels having a hollow axial protuberance and said at least one bearing having a race of one piece with said protuberance, said first flywheel having holes disposed at a greater second radial distance from said axes and said second flywheel having openings in at least partial alignment with said holes;
• and fasteners insertable into said holes from said first side to connect said first flywheel to the engine.

Apparatus for transmitting torque in a motor vehicle, comprising a first rotary flywheel connectable with an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with an input element of a transmission in the vehicle by a clutch, said first flywheel having a first side facing toward and a second side facing away from said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• at least one antifriction roller bearing between said flywheels, said flywheels defining an axial passage for a component and said at least one bearing surrounding said passage and having a radially innermost portion disposed at a first radial distance from the axes of said flywheels, said first flywheel having holes disposed at a greater second radial distance from said axes and said second flywheel having openings in at least partial alignment with said holes;
• and fasteners insertable into said holes from said first side to connect said first flywheel to the engine, said clutch comprising a pressure plate and a clutch plate which is centered between said pressure plate and said second flywheel, said clutch plate having openings in at least partial alignment with said holes and said clutch further comprising a diaphragm spring arranged to bias said pressure plate against said clutch plate, said spring having prongs provided with openings in at least partial alignment with the openings of said clutch plate to permit insertion of a torque transmitting tool through an opening of said prongs, an opening of said clutch plate and into engagement with a fastener which extends into the at least partially aligned hole of said first flywheel, said fasteners having enlarged portions and the openings of said prongs being too small to permit passage of said enlarged portions.

Apparatus for transmitting torque in a motor vehicle, comprising a first rotary flywheel connectable with an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with an input element of a transmission in the vehicle by a clutch, said first flywheel having a first side facing toward and a second side facing away from said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• at least one antifriction roller bearing between said flywheels, said flywheels defining an axial passage for a component and said at least one bearing surrounding said passage and having a radially innermost portion disposed at a first radial distance from the axes of said flywheels, said first flywheel having holes disposed at a greater second radial distance from said axes and said second flywheel having openings in at least partial alignment with said holes;
• and fasteners insertable into said holes from said first side to connect said first flywheel to the engine, said clutch comprising a pressure plate and a clutch plate which is centered between said pressure plate and said second flywheel, said clutch plate having openings in at least partial alignment with said holes and said fasteners having enlarged portions, the openings of said clutch plate being too small to permit passage of said enlarged portions.

Apparatus for transmitting torque in a motor vehicle, comprising a first rotary flywheel connectable with an engine of a vehicle;

• a second flywheel rotatable relative to said first flywheel and connectable with an input element of a transmission in the vehicle by a clutch, said first flywheel having a first side facing toward and a second side facing away from said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• at least one antifriction roller bearing between said flywheels, said flywheels defining an axial passage for a component and said at least one bearing surrounding said passage and having a radially innermost portion disposed at a first radial distance from the axes of said flywheels, said first flywheel having holes disposed at a greater second radial distance from said axes and said second flywheel having openings in at least partial alignment with said holes;
• and fasteners insertable into said holes from said first side to connect said first flywheel to the engine, said fasteners having enlarged portions and said openings being too small to permit passage of said enlarged portions but sufficiently large to permit introduction of a torque transmitting tool into engagement with fasteners extending into the at least partially aligned holes of said first flywheel.

Apparatus for transmitting torque in a motor vehicle, comprising a first rotary flywheel connectable with an engine of a vehicle;

• a pilot bearing in said first flywheel;
• a second flywheel rotatable relative to said first flywheel and connectable with an input element of a transmission in the vehicle by a clutch, said first flywheel having a first side facing toward and a second side facing away from said second flywheel;
• at least one damper operative to oppose rotation of said flywheels relative to each other and including energy storing elements acting in the circumferential direction of said flywheels;
• at least one antifriction roller bearing between said flywheels, said flywheels defining an axial passage for a component and said at least one roller bearing surrounding said passage and having a radially innermost portion disposed at a first radial distance from the axes of said flywheels, said first flywheel having holes disposed at a greater second radial distance from said axes and said second flywheel having openings in at least partial alignment with said holes;
• and fasteners insertable into said holes from said first side to connect said first flywheel to the engine.