VALVE TIMING ADJUSTMENT DEVICE

摘要

A valve timing adjustment device having a first rotating body (1) and a second rotating body (2). The first rotating body (1) has a housing (5) having a gear for transmitting power from a crankshaft and also having a shaft insertion hole formed in the center of the housing, a case (3) having projecting shoes (3a) in its inside and forming hydraulic pressure chambers between the shoes (3a), and a cover (4) for closing the opening on one end side of the case (3). The second rotating body (2) has vanes (2b) located between the shoes (3a) to divide each hydraulic pressure chamber into a timing advance chamber and a timing retardation chamber, pivotable in the first rotating body (1), and fixed to an intake or exhaust cam shaft. The cover (4) and housing (5) that are arranged so as to close openings on both sides of the case (3) to which the second rotating body (2) is assembled is integrally fixed to the case (3). The case (3) and the housing (4) are integrally joined together by sintering.