Plunging assembly for driveshaft

A plunging assembly of a driveshaft comprising:

• an outer housing having a bore having a plurality of outer ball grooves extending in a longitudinal direction;
• an inner shaft being disposed to be able to undergo relative movement in the longitudinal direction in the bore of the outer housing and having a plurality of inner ball grooves that are paired respectively with the outer ball grooves to form a plurality of ball tracks;
• a plunging unit connecting the outer housing and the inner shaft to allow a plunging motion and a rotational power transmission between the outer housing and the inner shaft;
• and
• a movement limiting unit configured to limit a longitudinal movement of the plunging unit and a relative movement of the outer housing and the inner shaft in a longitudinal direction, and
• wherein the movement limiting unit comprises:
• a first moving-in stopper for limiting a relative movement of the plunging unit in an insertion direction into the bore;
• a second moving-in stopper for limiting a relative movement of the outer housing and the inner shaft in a direction in which the inner shaft is inserted into the bore;
• a first moving-out stopper for limiting a relative movement of the plunging unit in a discharge direction out of the bore;
• and
• a second moving-out stopper for restricting a relative movement of the inner housing and the inner shaft in a direction in which the inner shaft is discharged out of the bore,
• wherein the outer housing has a mounting hole communicating with the bore,
• wherein the second moving-in stopper is a plug member that is inserted into the mounting hole in a state that an end portion thereof is exposed to the bore,
• wherein the outer housing has an inclined surface connecting the bore and the mounting hole,
• wherein the plug member comprises:
• a shock absorbing portion located in the bore;
• a fastening portion inserted into the mounting hole;
• and
• a connecting portion connecting the shock absorbing portion and the fixing portion, and
• wherein an outer peripheral surface of the connecting portion is formed to be inclined so as to be in close contact with the inclined surface.