Valve timing adjusting apparatus for internal combustion engine

Abstract

A valve timing adjusting apparatus comprises: a housing 31 integrally provided to a timing pulley driven by an engine crank shaft, a shoe hosing 33 which is connected to the housing 31 and having a plurality of shoes 33a protruded from the inner surface of housing, and a rotor 34 which is rotatably accommodated in the she housing 33, wherein a plurality of vanes protrudedly provided on the external surface of the rotor divide the space made by the plurality of shoes 33a into an angle-delay hydraulic cabin and an angle-advance hydraulic cabin, and the rotor 34 is coaxially connectable to the camshaft 2. The valve timing adjusting apparatus further comprises: a protruded portion 46 protruding in the axial direction of the housing 31 on either one of the abutting surfaces of the rotor 34 and the housing 31, and a recess 47 to be fitted to the protruded portion 46 is formed in the other of the rotor 34 and the housing 31.

What is claimed is:  
     
         1 . A valve timing adjusting apparatus comprising: 
 a housing integrally formed with a rotational member that is driven by a crankshaft at an engine side,    a shoe case, which is connected to said housing and having a plurality of shoes protruded from the inner surface of said shoe case, and    a rotor which is rotatably accommodated in said shoe case, and is formed with a plurality of vanes protruding from its external peripheral surface, said vanes dividing each of the spaces between the plurality of adjacent shoes into a first hydraulic cabin and a second hydraulic cabin, wherein said rotor is coaxially connectable with a camshaft for driving a valve of an engine system to be opened and/or shut,    wherein either one of the abutting surfaces between said rotor and said housing is formed with a protruded portion projecting in the axial direction of the housing, and the other of said abutting surfaces is formed with a recess to be fitted with said protruded portion.    
     
     
         2 . The valve timing adjusting apparatus according to  claim 1  characterized in that said protruded portion and said recess can be fitted in a slidable manner in the axial direction of either said rotor or said housing.  
     
     
         3 . The valve timing adjusting apparatus according to  claim 1 , wherein said protruded portion is a first annular projection coaxially formed with said rotor on a first boss section which is provided at either one of the axial opposite end portions of said rotor, and said recess is formed in a covering member covering one end of the axial opposite end portions and slidably fitted with said first annular projection, said recess being a first through hole coaxial with said covering member.  
     
     
         4 . The valve timing adjusting apparatus according to  claim 3 , wherein said protruded portion further contains a second annular projection coaxially formed with said rotor on a second boss section which is provided at the other end of said axial opposite end portions, and said recess further contains a second through hole coaxially formed in said housing, and silidablly fitted with said second annular projection.  
     
     
         5 . A valve timing adjusting apparatus comprising: 
 housing integrally formed with a rotational member that is driven by a crankshaft at an engine side,    a shoe case, which is connected to said housing and having a plurality of shoes protruded from the inner surface of said shoe case, and    a rotor which is rotatably accommodated in said shoe case, and is formed with a plurality of vanes protruding from its external peripheral surface, said vanes dividing each of the spaces between the plurality of adjacent shoes into a first hydraulic cabin and a second hydraulic cabin, wherein said rotor is coaxially connectable with a camshaft for driving a valve of an engine system to be opened and/or shut,    a covering member for covering either one of the opposite axial ends of said rotor, and    a bias means, which is disposed at the opposite side of said rotor and said shoe case with respect to said covering member, and urges said rotor against said shoe case either in the advancing direction or the retarding direction,    wherein either one of the abutting surfaces between said rotor and said housing is formed with a protruded portion projecting in the axial direction of the housing, and the other of said abutting surfaces is formed with a recess to be fitted with said protruded portion, wherein one part of said protruded portion is a fixed end of said bias means.