Electromagnetically actuated locking clutch for differential gears of motor vehicles
AssigneeZahnradfabrik Friedrichshafen AG
InventorsWalter Griesser, Friedrich Schreiner
Life of this patent
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Abstract
An electromagnetically actuated locking clutch for differential gears of motor vehicles having two concentrically disposed toroidal coils (8, 21) firm on a housing, one for a non-positive disk clutch (14) and the other for a positive claw clutch (26) concentrically disposed in respect thereto. Both clutches (14, 26) connect a hub (2) and a socket (3). The hub (2) and the socket (3) are each non-rotatably connected with a connecting member of the differential gear. The disk clutch (14) is closed by an automatic device when a limit value for a relative speed is exceeded. The claw clutch (26) is optionally closed and automatically opened when a limit value for an actuation period is exceeded.
Claims8
An electromagnetically actuated sliplimiting clutch for the differential gear of a motor vehicle including the following features:
- a first torque-transmitting connecting member of the differential gear non-rotationally supporting inner disks,
- a second connecting member non-rotationally supporting outer disks,
- said inner and outer disks comprising a sliplimiting friction clutch for said differential gear,
- a first toroidal coil fastened to a housing and interacting with a rotatable annular first armature closing said sliplimiting friction clutch,
- characterized by
- said first connecting member non-rotationally supported a first claw section (20),
- said second connecting member non-rotationally supporting a second claw section (19),
- said claw sections (19, 20) form a sliplimiting claw clutch (26) for said differential gear,
- a second toroidal coil (21) fastened to the housing and interacting with a rotatable annular second armature (18) closing said sliplimiting claw clutch (26),
- a spring (17) opening said sliplimiting claw clutch (26),
- wherein said first and second toroidal coils are alternatively independently energized to alternatively engage said friction clutch or said claw clutch.
A sliplimiting device for a differential gear of a motor vehicle, which comprises:
- a differential gear transmitting power from an input member to first and second output members,
- a friction clutch 14 non-positively connecting the two output members of the differential gear and thus limiting a speed difference between them,
- a claw clutch 26 positively connecting the two output members of the differential gear and thus eliminating speed difference between them,
- a first electromagnet engaging the friction clutch 14,
- a second electromagnet engaging the claw clutch 26,
- wherein said first and second electromagnets are alternatively independently energized to alternatively engage said friction clutch or said claw clutch.
Dependencies are inferred from the claim text.