Swash plate angle control mechanism of hydraulic continuously variable transmission

Abstract

In a configuration comprising a hydraulic servo mechanism (6) having a spool (72) as a hydraulic valve for controlling the swash plate angle disposed within a body housing (3) of a hydraulic continuously variable transmission (1 or 2), and a manual operation member (20) for operating the hydraulic servo mechanism disposed outside of the body housing, a casing (33) is provided between the manual operation member and the body housing, a neutral position holding mechanism (11) for holding the neutral position of a movable swash plate and a rotation control mechanism (34) for controlling the maximum rotating angle of the movable swash plate are installed in the casing, and further an over-stroke absorbing mechanism (27, 40) for absorbing the over-stroke of the manual operation member is installed in an area ranging from the inside of the casing to the inside of the body housing, and moreover a spool operating member (41) moving by operation of the manual operation member is disposed movably almost integrally with the spool.

Dependencies are inferred from the claim text.