Dual mass flywheel

Abstract

A dual mass flywheel includes: a primary flywheel having a ring gear and connected to an output shaft of an engine; a secondary flywheel connected to an input shaft of a transmission; a coupling unit for coupling the primary flywheel and the secondary flywheel; and a plurality of drive units coupled to the primary flywheel and the secondary flywheel and in which spring guides are coupled to opposite sides of a torsion spring to dampen noise and vibrations while a torque of the primary flywheel is transferred to the secondary flywheel. Wherein a unit groove for accommodating the drive units and a hub formed at an axis center of the primary flywheel are integrally formed by casting the primary flywheel, one or more embossments are formed on an outer surface of each of the spring guides to which the opposite ends of the torsion spring constituting the drive unit to minimize a frictional area thereof with the unit groove (111).

Description

technical field [0001] The present invention relates to dual mass flywheels, and more particularly to an improved dual mass flywheel which effectively attenuates the shock and noise generated in the process of transmitting the power of the engine to the transmission and at the same time does not results in a loss of torque and has a simpler construction due to the reduced number of parts. Background technique [0002] Dual-mass flywheels (DMF) for vehicles are adapted to dampen the motion caused by the damped operation of the arc springs when the drive plate connecting the primary and secondary flywheels moves in combination with the arc springs mounted to the main mass Shock between the engine and transmission, thereby reducing vibration and noise caused by sudden acceleration of the vehicle, such as gear noise and body roar. [0003] If the driving force of the engine is transmitted to the main mass due to the above-mentioned technical configuration, the driving plate als...

AI Technical Summary

Problems solved by technology

However, grease leaks during operation, thereby affecting the normal operation of other parts, and when a sealing unit for preventing leakage is added, the number of parts increases

[0011] In addition, since the spring guide and the main mass are in surface contact with each other, friction becomes severe and frictional resistance becomes more severe due to the viscosity of grease suitable for lubrication, thereby affecting the smooth operation of the spring guide and the main mass

Therefore, when impurities are deposited between the spring guide and the main mass, it is difficult to expect smooth operation, and normal operation is impossible, which reduces the quality and durability of the dual mass flywheel, and reduces the quality and durability of the dual mass flywheel installed with it. The quality and durability of the vehicle

[0012] In addition, since the main mass is formed of a metal plate by means of a press, and the hub H coupled to the main mass is forged, many processes are required to manufacture the dual mass flywheel, thereby complicating the entire manufacturing process and increasing the manufacturing cost

[0013] In addition, since a separate driving plate serving as a unit for operating a buffer member such as a spring and a spring guide housed in the main mass is fixed to the bottom surface of the sub-mass by means of a fixing unit, a lot of cost and time are consumed for sorting and assembling many parts, thus reducing productivity and increasing manufacturing costs

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