Stator for a camshaft adjuster, with a washer for reducing axial bearing play

Abstract

A stator assembly ( 1 ) for a camshaft adjuster ( 2 ), including a stator ( 3 ) the exterior ( 5 ) of which has a toothed portion ( 4 ) for absorbing torque provided by a crankshaft is provided. The stator ( 3 ) includes a wall ( 6 ) which integrally forms the toothed portion ( 4 ) and has an axially running cavity ( 7 ) for receiving a rotor ( 9 ). At least one flange section ( 8 ) of the stator ( 3 ), which protrudes radially inwards, forms an axial stop for the rotor ( 9 ). A spacer disk ( 10 ) which is separate from the stator ( 3 ) and the rotor ( 9 ) is present in the cavity ( 7 ) and sealingly rests on the flange section ( 8 ). A vane-type hydraulic camshaft adjuster which includes a rotor and a stator assembly of the above type is provided.

What is claimed is: 
     
         1 - 10 . (canceled) 
     
     
         11 . A stator assembly for a camshaft adjuster, the stator assembly comprising:
 a stator for absorbing torque provided by a crankshaft, the stator having a wall including a cavity extending in an axial direction for the purpose of accommodating a rotor, at least one radially inwardly protruding, integrally provided flange section of the stator forming an axial stop for the rotor; and   a spacing washer separate from the stator and from the rotor and located in a cavity between the stator and the rotor.   
     
     
         12 . The stator assembly as recited in  claim 11  wherein the spacing washer has at least one recess extending from an outside to an interior of the spacing washer and dimensioned to establish a form-locked fit with the stator. 
     
     
         13 . The stator assembly as recited in  claim 12  wherein the at least one recess includes a plurality of rectangular recesses distributed evenly over a circumference of the spacing washer. 
     
     
         14 . The stator assembly as recited in  claim 11  wherein the spacing washer has a central through-opening, and multiple indentations extending in the axial direction are present between the central through-opening and the outer circumference of the spacing washer. 
     
     
         15 . The stator assembly as recited in  claim 14  wherein the indentations are pockets or through-holes. 
     
     
         16 . The stator assembly as recited in  claim 14  wherein the indentations are provided on the side of the spacing washer facing the flange section, or pockets are present on q side of the spacing washer facing away from the flange section. 
     
     
         17 . The stator assembly as recited in  claim 14  wherein at least one nub extending in the axial direction is provided in the indentation. 
     
     
         18 . The stator assembly as recited in  claim 15  wherein a hydraulic medium conducting hole is provided in the pocket. 
     
     
         19 . The stator assembly as recited in  claim 15  wherein each pocket is surrounded by a planarly designed, raised edge of the spacing washer. 
     
     
         20 . A vane-type, hydraulic camshaft adjuster comprising: the rotor and the stator assembly as recited in  claim 11 .