| 摘要 |
A device for electrically adjusting the relative rotation of two shafts, particularly a camshaft ( 15 ) in relation to a crankshaft of an internal combustion engine is provided. The adjusting device includes an adjusting gear system which is embodied as a triple-shaft gear mechanism and is provided with a crankshaft-fixed input part, a camshaft-fixed output part, and an adjusting shaft ( 13 ) that is connected in a torsion-proof manner to an electric adjusting motor shaft ( 32 ) of an electric adjusting motor ( 3 ). The adjusting motor ( 3 ) is configured as a brushless DC motor having a housing-fixed stator ( 35 ) and a permanent magnet rotor ( 34 ). A high degree of adjustment accuracy and adjustment speed are provided with minimal space requirements and low power consumption. This is achieved through the use of a double eccentric gear mechanism ( 2 ) and a double planetary gear mechanism, which are provided with a speed reduction of up to about 1:250 and low friction, as an adjusting gear system while using a highly inductive permanent magnet rotor for the adjusting motor ( 3 ).
|
