Cam phase adjuster

Abstract

The present disclosure relates to a cam phase adjuster. The cam phase adjuster comprises a stator, a sprocket wheel and a cushioning ring, wherein the sprocket wheel radially protrudes from an outer side face of the stator, and the cushioning ring surrounds the outer side face of the stator. The stator and/or the sprocket wheel comprise(s) a trench feature region, which is formed on a surface, a plurality of trenches extending obliquely in a circumferential direction are formed in the trench feature region, and the cushioning ring is bonded to the trench feature region. The cam phase adjuster of the present disclosure is easy to produce.

1 . A cam phase adjuster, comprising:
 a stator,   a sprocket wheel, and   a cushioning ring, and   the sprocket wheel radially protrudes from an outer side face of the stator, and the cushioning ring surrounds the outer side face of the stator, and   at least one of the stator or the sprocket wheel comprises a groove feature region formed on a surface, the groove feature region comprising a plurality of grooves extending obliquely with respect to a circumferential direction, and the cushioning ring is bonded to the groove feature region.   
     
     
         2 . The cam phase adjuster according to  claim 1 , wherein the groove feature region is formed on a radially outer side surface of the stator and adjacent to the sprocket wheel in an axial direction. 
     
     
         3 . The cam phase adjuster according to  claim 2 , wherein the plurality of grooves extend in the axial direction. 
     
     
         4 . The cam phase adjuster according to  claim 3 , wherein the plurality of grooves are evenly spaced in the circumferential direction. 
     
     
         5 . The cam phase adjuster according to  claim 4 , wherein the groove feature region has a saw-toothed profile in a cross-section perpendicular to the axial direction. 
     
     
         6 . The cam phase adjuster according to an to  claim 3 , wherein the plurality of grooves are integrally formed with the stator via a powder metallurgy process. 
     
     
         7 . The cam phase adjuster according to  claim 2 , wherein the plurality of grooves parallel to one another. 
     
     
         8 . The cam phase adjuster according to  claim 2 , wherein the plurality of grooves comprise a plurality of first parallel extending grooves and a plurality of second parallel extending grooves, and the plurality of first parallel extending grooves are not parallel to the plurality of second parallel extending grooves. 
     
     
         9 . The cam phase adjuster according to  claim 8 , wherein the plurality of first parallel extending grooves are evenly spaced in the circumferential direction, and/or the plurality of second parallel extending grooves are evenly spaced a in the circumferential direction. 
     
     
         10 . The cam phase adjuster according to  claim 7 , wherein the plurality of grooves are formed via a turning or knurling process. 
     
     
         11 . The cam phase adjuster according to  claim 1 , wherein the groove feature region has a triangular profile in a cross-section perpendicular to an axial direction. 
     
     
         12 . The cam phase adjuster according to  claim 1 , wherein the groove feature region extends from an axial face of the stator. 
     
     
         13 . The cam phase adjuster according to  claim 2 , wherein the plurality of grooves extend radially inwardly from the radially outer side surface. 
     
     
         14 . A cam phase adjuster, comprising:
 a stator having:
 a sprocket wheel, and 
 a radial outer surface axially adjacent to the sprocket wheel, the radial outer surface having a plurality of grooves extending: i) axially from an axial face of the stator, and ii) radially inwardly from the radial outer surface, and 
   a cushioning ring extending circumferentially around the radial outer surface and bonded to the plurality of grooves.   
     
     
         15 . The cam phase adjuster of  claim 14 , wherein a profile of the plurality of grooves is defined by angled sides. 
     
     
         16 . The cam phase adjuster of  claim 14 , wherein the sprocket wheel protrudes radially outwardly of the cushioning ring. 
     
     
         17 . A method for manufacturing a stator for a cam phaser, the method comprising forming the stator via a powder metallurgy process so as to simultaneously form a sprocket wheel and a grooved radial outer surface separate from the sprocket wheel, the grooved radial outer surface configured to receive an elastomeric cushioning ring. 
     
     
         18 . The method of  claim 17 , wherein the grooved radial outer surface comprises a plurality of axially extending grooves. 
     
     
         19 . The method of  claim 18 , wherein the elastomeric cushioning ring is configured to be bonded to the grooved radial outer surface. 
     
     
         20 . The method of  claim 18 , wherein the elastomeric cushioning ring is arranged axially adjacently to the sprocket wheel.