Apparatus for adjusting a camshaft

Abstract

The invention relates to an apparatus for adjusting a camshaft of an internal combustion engine with at least one electromotor which, by way of a gear, produces the adjustment of the camshaft with respect to a pinion, with the gear comprising a planet cage on which at least one planet wheel is provided which is driven by an electromotor. A rapid adjustment with a simple arrangement at the same time can be achieved in such a way that several planet wheels are provided which are in engagement with a ring gear and that each planet wheel is associated with an electromotor which drives the same via a common shaft.

What is claimed is:  
     
         1 . An apparatus for adjusting a camshaft of an internal combustion engine with at least one electromotor which, by way of a gear, produces adjustment of the camshaft with respect to a pinion, said gear comprising 
 a ring gear;    at least two planet wheels engaging with said ring gear;    a planet cage bearing said planet wheels;    wherein at least one electromotor is connected to each planet wheel by a common shaft which electromotor drives the planet wheel.    
     
     
         2 . An apparatus according to    claim 1   , wherein the planet wheels are arranged as worm wheels and that the ring gear is provided with a helical gearing.  
     
     
         3 . An apparatus according to    claim 2   , wherein each worm wheel is driven by two mutually oppositely disposed electromotors.  
     
     
         4 . An apparatus according to    claim 1   , wherein the electromotors are supplied via slip rings with power.  
     
     
         5 . An apparatus according to    claim 1   , wherein the pinion is directly connected with the ring gear.  
     
     
         6 . An apparatus according to    claim 5   , wherein the pinion is provided with an integral arrangement with the ring gear.  
     
     
         7 . An apparatus according to    claim 1   , wherein the camshaft is in connection with the ring gear and the pinion is in connection with the planet cage.