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AssigneeNtn Corporation
InventorsHIROAKI MAKINO, KAZUHIRO MURAMATSU, KAZUHIKO YOSHIDA, AKIRA WAKITA, KATSUYUKI IKEI, HISAAKI KURA
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A shaft member 1 and an outer peripheral member 2 disposed on the outer periphery of the shaft member 1 are joined together by splines 3 through which the teeth 31 of the shaft member 1 and the teeth 32 of the outer peripheral member 2 are fitted together. At one axial end of each spline 3, a trough 31 in the tooth 31 of the shaft member 1 is diametrically increased to provide a diametrically increased region S1. In this diametrically increased region S1, there is defined a fit region F for the tooth 31 of the shaft member 1 and the tooth 32 of the outer peripheral member 2.
A power transmission mechanism wherein a shaft member and an outer peripheral member disposed on the outer periphery of said shaft member are connected for mutual torque transmission by a fit between the teeth of the shaft member and the teeth of the outer peripheral member, and troughs in the teeth of the shaft member are diametrically increased at least at one axial end, said power transmission mechanism being characterized in that in the diametrically increased regions of said troughs, there are fit regions for the teeth of the shaft member and the teeth of the outer peripheral member.
Dependencies are inferred from the claim text.