Valve Timing Adjusting Device

Abstract

A valve timing adjusting device includes a first rotor rotating integrally with a crankshaft; a second rotor secured integrally with an intake or exhaust camshaft; a first hole formed passing through radially to a shoe formed inside the first rotor; a second hole formed through the shoe, intersecting the first hole; a coil spring pressing a lock pin received in the first hole to thereby engage the lock pin into a concavity formed on the outer peripheral surface of the second rotor; and a shaft inserted into the second hole in order to prevent the coil spring from dashing out.

1 . A valve timing adjusting device comprising:
 a first rotor that integrally secures a case inside having a plurality of projecting shoes and forming oil pressure chambers between those shoes, a front cover, and a rear cover, both covering the oil pressure chambers, and that rotates integrally with a crank shaft;   a second rotor that has a plurality of vanes each dividing each of the oil pressure chambers into an advanced-side oil pressure chamber and a retarded-side oil pressure chamber, is able to relatively rotate by a predetermined angle within the first rotor, and is secured integrally with an intake or exhaust camshaft;   a hydraulic pressure supply and exhaust means capable of supplying working fluid to and exhausting it from the advanced-side oil pressure chambers and the retarded-side oil pressure chambers;   a first hole passing through the shoe radially to the device;   a second hole formed through the shoe, intersecting the first hole;   a coil spring pressing a lock pin received in the first hole to thereby engage the lock pin into a concavity provided on an outer peripheral surface of the second rotor; and   a shaft inserted into the second hole in order to prevent the coil spring from dashing out.   
   
   
       2 . The valve timing adjusting device according to  claim 1 , wherein the diameter of the shaft is smaller than the diameter of the first hole. 
   
   
       3 . The valve timing adjusting device according to  claim 1 , wherein the diameter of the shaft is smaller than the diameter of the coil spring. 
   
   
       4 . The valve timing adjusting device according to  claim 1 , wherein the shaft has a plane bearing surface receiving the coil spring on a part of its outer peripheral surface. 
   
   
       5 . The valve timing adjusting device according to  claim 4 , wherein the shaft has a D-shaped cross section. 
   
   
       6 . The valve timing adjusting device according to  claim 1 , wherein a positioning concavity is formed on either or both of the front cover and the rear cover on which the end of the shaft abuts. 
   
   
       7 . The valve timing adjusting device according to  claim 1 , wherein the shaft is at one time formed by forging.