An object of the present invention is in the automatic transmission for automobiles, relates to a mounting structure of the stator shaft (Stator shaft), it can be sufficiently secured, and assembling accuracy to provide a mounting structure capable of ensuring the sufficient sealing surface oil.
In the automotive automatic transmission to achieve the above object, a mounting structure of the stator shaft (Stator shaft), one end on the side of the oil pump 300, the other on the inner circumference (內 周) of the oil pump cover 200, which is disposed in the stator shaft 100, which is installed fitted one end side from the short side, the stator shaft 100 has the small diameter 110 and is formed of a large-diameter (120), the other end periphery (外 周) of the large diameter 120 side between serrations (Seration) (121) on one end side outer circumference (外 周), the cutting gap, and 130 are formed, recess 130 and the small diameter portion 110 of the can is formed, the large-diameter (120) 140 is formed, and the oil for the pump cover 200, the inner periphery (內 周), the stator shaft small diameter portion 210 and the stator shaft 100 to which the small diameter 110 of 100 is press-fitted in the diameter portion 120 side surface portion 140 of the coupling serration-fit large diameter portion 220 and the stator shaft 100 and corresponding to The side surface 240 has a shape is formed, and the stator shaft 100, the large diameter 120 is serration-fit combining the oil pump cover in a state in large diameter portion 220 and the predetermined position of the oil pump cover 200 of the ( large diameter portion 220 and the gap (G) between when 131 of the recess 130 of the stator shaft 100 to be formed, in addition, side portions 140 and the oil pump of the stator shaft 100 of 200) the side portion 240 of the cover 200 is configured to be in contact with each other.