Patent ID: 6802781
Filing Date: 2004-10-12
Classification: F16C,F16D

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), said outer profile sleeve adapted tobe connected to a first attachment part; a profiled journal (31) positioned inside said outer profiled sleeve (21) and having circumferentlally distributed, outer, longitudinally extending second ball grooves (32), said profiled journal adapted to be connected to a second attachment part; groups of balls (41), each arranged in pairs of the first and second ball grooves (22,32); and a sleeve-shaped ball cage (42) positioned in an annular space between the profiled sleeve (21) and the profiled journal (31), which is plungeable with respect to the profiled sleeve (21) and the profiled journal (31) respectively and which fixes the groups of balls (41) in their respective positions relative to one another; wherein the profiled sleeve (21) comprises a material with a substantially uniform wall thickness with a maximum deviation in wall thickness of Â±15% and wherein, in a region adjoining the first ball grooves (22), towards the first attachment part, the profiled sleeve (21) changes integrally into a first cylindrical projection (23) and, in a region adjoining the first ball grooves (22), towards the second attachment part, the profiled sleeve (21) changes integrally into a second cylindrical projection (25).