Patent ID: 7527575

Claim:
A lockable differential in which a driven differential cage ( 5 ), a bevel gear ( 2 ), and a sliding sleeve ( 4 ) are all co-axially disposed along a common axis of rotation ( 7 ) and a plug shaft is non-torsionally connected with the bevel gear ( 2 ) and the sliding sleeve ( 4 ), a first lockable part ( 6 ) is non-rotatably connected with the differential cage ( 5 ) and forms a first part ( 10 ) of a positive-fit clutch ( 12 ), the sliding sleeve ( 4 ) forms a second lockable part ( 11 ) of the positive-fit clutch ( 12 ), the positive-fit clutch ( 12 ) being engaged and disengaged by displacement of the sliding sleeve ( 4 ) along the common axis of rotation ( 7 ), the sliding sleeve ( 4 ) being biased toward an engagement direction by pressurization of a piston ( 15 ) which is located co-axially relative to the sliding sleeve ( 4 ), and the piston ( 15 ) applying a displacement force to the sliding sleeve ( 4 ) via a bearing ( 14 ); the piston ( 15 ) has a contact surface ( 16 ) and the sliding sleeve ( 4 ) has a contact surface ( 13 ), and the bearing ( 14 ) is located between the contact surface ( 16 ) of the piston ( 15 ) and the contact surface ( 13 ) of the sliding sleeve ( 4 ); and a spring ( 19 ) forces the bearing ( 14 ) to engage with the contact surface ( 16 ) of the piston ( 15 ).