Spring support having a height-adjustable spring plate
Spring support having at least one axially moveable spring plate, an actuator with a rotor producing a rotational movement relative to its stator, which is converted into an axial movement of the spring plate, and a torsional locking element which prevents torsional movement of the spring plate.
1. A spring support comprising:
a housing;
an actuator in said housing, said actuator comprising a stator which is fixed with respect to said housing and a rotor which is operable to rotate in said housing, said rotor being arranged radially outside of said stator and having an outer side with a force introducing profile;
a force transmitting element which moves axially in response to rotation of said rotor, said force transmitting element having an inner side with a mating profile which cooperates with said force introducing profile to convert rotational movement to axial movement;
a torsional locking element which prevents rotational movement of said force transmitting element with respect to said housing; and
a spring plate fixed to said force transmitting element.
2. A spring support as in claim 1 wherein said torsional locking element acts radially on said force transmitting element.
3. A spring support as in claim 1 wherein said torsional locking element comprises a sleeve.
4. A spring support as in claim 1 wherein said sleeve comprises an axial guide for said force-transmitting element.
5. A spring support as in claim 1 wherein said torsional locking element comprises a swivel-mounted strut which braces said torsional locking element against rotation with respect to a vehicle body.
6. A spring support as in claim 2 wherein said rotor has torque generating surfaces which cooperate with said stator, said outer side of said spindle having a smaller radius than said torque generating surfaces.
7. A spring support as in claim 1 further comprising means for fixing said housing to a vehicle body above a passage in said body.
8. A spring support as in claim 7 further comprising a piston rod braced against said housing.
9. A spring support as in claim 8 wherein said stator is braced against rotation with respect to said piston rod.
10. A spring support as in claim 8 wherein said torsional locking element is braced against rotation with respect to said piston rod.