Electromagnetic frictionally engaged clutch and method for operating the same
First Claim
1. An electromagnetic frictionally engaged clutch to be arranged within a drive train connecting a drive motor and a vehicle door or a vehicle flap, having the following features:
- a) the clutch (1;
20) comprises a rotor part (4) which is provided with a friction lining (2) and is firmly connected to a first shaft (3) so as to rotate with it and, on its side facing away from the friction lining (2), an electric coil (6) is arranged, and an armature disk (10) which is firmly connected to a second shaft (9) so as to rotate with it but can be displaced axially;
b) arranged on the rotor part (4) in addition to the electric coil (6) is at least one permanent magnet (15), so that when the coil (6) is not energized, the armature disk (10) is pressed against the friction lining (2) of the rotor part (4) with a force which is high enough for the vehicle door or vehicle flap to remain securely in the respective position assumed when the clutch (1;
20) is disengaged and, during subsequent manual operation of the vehicle door or vehicle flap, 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.
17 Citations
10 Claims
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1. An electromagnetic frictionally engaged clutch to be arranged within a drive train connecting a drive motor and a vehicle door or a vehicle flap, having the following features:
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a) the clutch (1;
20) comprises a rotor part (4) which is provided with a friction lining (2) and is firmly connected to a first shaft (3) so as to rotate with it and, on its side facing away from the friction lining (2), an electric coil (6) is arranged, and an armature disk (10) which is firmly connected to a second shaft (9) so as to rotate with it but can be displaced axially;
b) arranged on the rotor part (4) in addition to the electric coil (6) is at least one permanent magnet (15), so that when the coil (6) is not energized, the armature disk (10) is pressed against the friction lining (2) of the rotor part (4) with a force which is high enough for the vehicle door or vehicle flap to remain securely in the respective position assumed when the clutch (1;
20) is disengaged and, during subsequent manual operation of the vehicle door or vehicle flap, 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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Specification