Importance

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Abstract

A longitudinal plunging unit (11) for torque transmitting purposes in a shaft assembly, comprising an outer profiled sleeve (21) having circumferentially distributed, inner, longitudinally extending first ball grooves (22) to be connected to a first attachment part, a profiled journal (31) positioned inside the outer profiled sleeve (21) and having circumferentially distributed, outer, longitudinally extending second ball grooves (32) to be connected to a second attachment part, groups of balls (41) arranged in pairs of first and second ball grooves (22, 32), and a sleeve-shaped ball cage (42) which is positioned in the annular space between the profiled sleeve (21) and the profiled journal (31) and which fixes the groups of balls (41) in their respective positions relative to one another. The profiled sleeve (21) comprises a material with a substantially uniform wall thickness with a maximum deviation in wall thickness of .+-.15% and, in the region adjoining the first ball grooves (22), towards the first attachment part, changes integrally into a first cylindrical projection (23) and, in the region adjoining the first ball grooves (22), towards the second attachment part, changes integrally into a second cylindrical projection (25).

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First Claim