Actuator for operating speed change controlling valve of an automatic speed changer

摘要

In an actuator for operating a speed change controlling valve of an automatic speed changer, a lever (30) is operated by a stepping motor (1) and a conversion mechanism received within a housing (12). Also, an engagement hole (2a) is formed in an outer casing member (2) of the stepping motor, and an engagement portion (12a) of the housing is inserted into the engagement hole so that the housing is coupled with the stepping motor. A positioning projection (12b) that is brought into contact with an inner circumferential surface of the engagement hole is formed on an outer circumferential surface of the engagement portion. <IMAGE>