Valve Timing Adjusting Device

Abstract

A first rotor integrally fixes a housing having the bearing of a camshaft, a case, which internally has a plurality of projecting shoes and which forms hydraulic chambers between these shoes, and a cover, which covers the hydraulic chambers, and the first rotor rotates integrally with a crank shaft. A second rotor has a plurality of vanes each dividing the hydraulic chamber into an advanced-angle hydraulic chamber and a retarded-angle hydraulic chamber, can rotate by a predetermined angle within the first rotor, and is integrally fixed with an intake or exhaust camshaft. A groove accommodating an energizing part, opposed to the shoe of the first rotor and to the vane of the second rotor, is provided on the opposite side to the housing.

1 . A valve timing adjusting device comprising:
 a first rotor that integrally fixes a housing having the bearing of a camshaft, a case internally having a plurality of shoes projecting therefrom and having hydraulic chambers formed between the shoes, and a cover covering the hydraulic chambers, and that rotates integrally with a crank shaft;   a second rotor that has a plurality of vanes each dividing the hydraulic chamber into an advanced-angle hydraulic chamber and a retarded-angle hydraulic chamber, can rotate through a predetermined angle within the first rotor, and is integrally fixed with an intake or exhaust camshaft;   energizing means for adjusting the relative position between the first rotor and the second rotor;   a groove provided on the opposite side of the shoe to the housing to accommodate one-end side of the energizing means; and   a hole or a groove provided in the vane of the second rotor to accommodate the other-end side of the energizing means.   
   
   
       2 . A valve timing adjusting device according to  claim 1 , wherein the groove accommodating the energizing means is molded by a mold. 
   
   
       3 . A valve timing adjusting device according to  claim 1 , wherein the position at which the energizing means becomes straight is positioned in the vicinity of the position at which the length of the energizing means becomes the maximum. 
   
   
       4 . A valve timing adjusting device according to  claim 1 , wherein a clearance is created between the shoe and the vane when the energizing means is maximally compressed. 
   
   
       5 . A valve timing adjusting device according to  claim 1 , wherein a plurality of the energizing means are equally loaded and are disposed at a substantial equiangular space between the shoe and the vane.