Patent ID: 6044948
Filing Date: 2000-04-04
Classification: F16D,F16H

Abstract:
A spline-connection structure for a power-transmission device, comprising:a clutch drum having a longitudinal internal splined portion formed on and extending axially along an inner peripheral surface of said clutch drum, said longitudinal internal splined portion including (i) a first splined portion formed at a diametrically-enlarged drum end of said clutch drum and (ii) a second splined portion formed at a substantially central section of said clutch drum, said first splined portion having internal spline elements separated by internal spline grooves and having a cut-out portion cut through at least one of said internal spline grooves;another power-transmission member including (i) an external splined portion having external spline elements for splined engagement with said internal spline grooves of said first splined portion and (ii) an external toothed portion dimensioned to project radially outwardly through said cut-out portion of said first splined portion, said external toothed portion being circumferentially spaced from said external spline elements of said external splined portion; andclutch plates for splined engagement with said second splined portion of said clutch drum,wherein a spline height (T.sub.2) of said internal spline elements of said first splined portion is greater than a spline height (T.sub.3) of internal spline elements of said second splined portion, andwherein a spline height of said external spline elements of said external splined portion of said another power-transmission member is substantially equal to the spline height (T.sub.2) of said internal spline elements of said first splined portion.