Electromagnetic frictionally engaged clutch and method for operating the same
First Claim
1. An electromagnetic friction clutch (1;
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20) in a drive train connecting a drive motor and a vehicle door selectively driven by the drive motor between open and closed positions the clutch comprising;
a rotor part (4) provided with a friction lining (2) and drivingly connected to a first shaft (3) so as to rotate therewith;
an electric coil (6) arranged on a side of the rotor part (4) facing away from the friction lining (2), andan armature disk (10) drivingly connected to a second shaft (9) so as to rotate therewith axially movable relative to the second shaft (9);
at least one permanent magnet (15) arranged on the rotor part (4), the at least one permanent magnet (15) having a magnetic force such that the armature disk (10) is pressed against the friction lining (2) of the rotor part (4) with a friction force which is high enough for the vehicle door to remain securely in the open position assumed when the electric coil (6) is not energized and such that, during subsequent manual operation of the vehicle door, the frictional connection between armature disk (10) and friction lining (2) can be overcome.
2 Assignments
0 Petitions
Accused Products
Abstract
An electromagnetic frictionally engaged clutch for arranging inside a drive train connecting a drive motor and a vehicle door or flap. The arrangement ensures that the vehicle door is securely held in each intermediate position, when the clutch is in an idle state, while maintaining the possibility of a manual emergency actuation of the vehicle door. The rotor includes at least one permanent magnet in addition to the electric coil, such that when a current does not pass through the coil, the armature disk is pressed against the friction lining of the rotor, with a force which is strong enough for the vehicle door or vehicle flap to securely remain in position occupied when the clutch is an idle state, and for the friction engagement between the armature disk and the friction lining to be overcome when the vehicle door or vehicle flap is subsequently manually actuated.
19 Citations
10 Claims
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1. An electromagnetic friction clutch (1;
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20) in a drive train connecting a drive motor and a vehicle door selectively driven by the drive motor between open and closed positions the clutch comprising;
a rotor part (4) provided with a friction lining (2) and drivingly connected to a first shaft (3) so as to rotate therewith; an electric coil (6) arranged on a side of the rotor part (4) facing away from the friction lining (2), and an armature disk (10) drivingly connected to a second shaft (9) so as to rotate therewith axially movable relative to the second shaft (9); at least one permanent magnet (15) arranged on the rotor part (4), the at least one permanent magnet (15) having a magnetic force such that the armature disk (10) is pressed against the friction lining (2) of the rotor part (4) with a friction force which is high enough for the vehicle door to remain securely in the open position assumed when the electric coil (6) is not energized and such that, during subsequent manual operation of the vehicle door, the frictional connection between armature disk (10) and friction lining (2) can be overcome. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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20) in a drive train connecting a drive motor and a vehicle door selectively driven by the drive motor between open and closed positions the clutch comprising;
Specification