Roll stabilizer for the chassis of a motor vehicle

1. Vehicle roll stabilizer for a motor vehicle chassis comprising an actuator ( 3 , 38 ) that is energizable with independent energy for counteracting a roll, the actuator ( 3 , 38 ) includes an additional energy accumulator ( 33 a , 57 ) that stores additional energy that counteracts the roll with a counter torsional movement as the additional energy is released.

2. Vehicle roll stabilizer according to claim 1 , wherein the additional energy accumulator ( 33 a , 57 ) uses its energy in a single direction of relaxation to counteract the roll in one rolling direction or an opposite rolling direction.

3. Vehicle roll stabilizer according to claim 2 , wherein the stabilizer is located between two stabilizer halves ( 1 , 2 , 36 , 37 ), with the actuator ( 3 , 38 ), being connected to one of the stabilizer halves ( 1 , 36 ) and to the other stabilizer half ( 2 , 37 ).

4. Vehicle roll stabilizer according to claim 1 , wherein the additional energy accumulator ( 33 a , 57 ), in a neutral position of the actuator ( 3 , 38 ), stores energy for counteracting the roll by performing work.

5. Vehicle roll stabilizer according to claim 4 , wherein the actuator ( 3 , 38 ) performs a rotation around a rotational axis in order to rotate the stabilizer halves ( 1 , 2 , 36 , 37 ).

6. Vehicle roll stabilizer according to claim 1 , wherein a stop device ( 23 , 55 ) is provided keeping the energy accumulator ( 33 a , 57 ) filled with the stored energy in a neutral position of the actuator ( 3 , 38 ).

7. Vehicle roll stabilizer according to claim 1 , wherein the actuator ( 3 , 38 ) comprises an actuating drive ( 11 a , 42 a ) that is energizable with independent energy and the additional energy accumulator ( 12 , 54 , 57 ).

8. Vehicle roll stabilizer according to claim 7 , wherein the actuating drive ( 11 a , 42 a ), that can be energized with the independent energy, comprises an electric motor ( 7 , 41 ) having a rotor ( 9 a ) that drives a threaded spindle ( 10 , 42 ) provided with a spindle nut ( 11 ).

9. Vehicle roll stabilizer according to claim 1 , wherein the additional energy accumulator comprises a spring element ( 12 , 54 ).

10. Vehicle roll stabilizer according to claim 9 , wherein the spring element is formed by a helical spring ( 12 , 54 ), positioned generally coaxial to a rotational axis of the actuator.

11. Vehicle roll stabilizer for a motor vehicle chassis comprising an actuator ( 3 , 38 ) that is energizable with independent energy for counteracting a roll, the actuator ( 3 , 38 ) includes an actuating drive ( 11 a , 42 a ) and an additional energy accumulator ( 33 a , 57 ) that stores additional energy that counteracts the roll as the additional energy is released, wherein the actuator, arranged between the stabilizer halves ( 1 , 2 , 36 , 37 ), is provided with a first transmission ( 20 a , 46 ) secondary to an actuating drive ( 11 a , 42 a ), in order to convert an adjustment path of the actuating drive ( 11 a , 42 a ) into a rotational motion, by using the additional energy accumulator ( 33 a , 57 ), by which the stabilizer halves ( 1 , 2 , 36 , 37 ) are rotated in reference to one another by a rotational angle around a rotational axis of the actuator ( 3 , 38 ).

12. Vehicle roll stabilizer according to claim 11 , wherein the first transmission comprises a first curved path transmission ( 20 a , 46 ), having two curved path carriers ( 4 , 5 , 39 , 40 ) allocated to the stabilizer halves ( 1 , 2 , 36 , 37 ), with a shiftable first coupling element ( 13 , 45 ) being guided in the first curved paths ( 18 , 43 , 44 ), along said first curved paths by the actuating drive ( 11 a , 42 a ).

13. Vehicle roll stabilizer according to claim 11 , wherein a transmission ( 20 a , 53 ), secondary to the additional energy accumulator ( 33 a , 57 ), is provided in order convert an axial relaxation path of the additional energy accumulator ( 54 , 57 ) into a rotational motion, by which the stabilizer halves ( 36 , 37 ) are being rotated relative to one another by the rotation angle.

14. Vehicle roll stabilizer according to claim 13 , wherein the transmission is provided with a curved path transmission ( 20 a , 53 ) having curved path carriers ( 4 , 5 , 39 , 40 ) allocated to the two stabilizer halves ( 36 , 37 ), in which a coupling element ( 13 , 52 ) that can be displaced along the curved paths ( 18 , 47 , 51 ) is guided along the curved paths ( 18 , 47 , 51 ), different from one another, by way of the additional energy accumulator ( 33 a , 57 ).

15. Vehicle roll stabilizer according to claim 14 , wherein the curved path transmission ( 20 a , 53 ) is provided with a curved path ( 17 , 51 ) allocated to the other curved path carrier ( 4 , 40 ), extending generally straight and parallel to the rotational axis of the actuator ( 38 ).

16. Vehicle roll stabilizer according to claim 14 , wherein the curved path transmission ( 20 a , 53 ) is provided with an approximately V-shaped or U-shaped curved path ( 47 ) allocated to one of the curved path carriers ( 5 , 39 ), with two curved path branches ( 19 , 20 , 48 , 49 ) being arranged symmetrically in a mirror reflection arrangement relative to a longitudinal central plane containing a rotational axis of the actuator ( 38 ).

17. Vehicle roll stabilizer according to claim 16 , wherein the curved path branches ( 19 , 20 , 48 , 49 ) merge in an interface ( 21 , 50 ) located on the longitudinal central plane.

18. Vehicle roll stabilizer according to claim 17 , wherein the coupling element ( 13 , 52 ) is energized by the additional energy accumulator ( 33 a , 57 ), with the coupling element ( 13 , 52 ) being located in an area of the interface ( 21 , 50 ) in a neutral position.

19. Vehicle roll stabilizer according to claim 18 , wherein a stop device ( 23 , 55 ) is provided, by which the coupling element ( 13 , 52 ) is held in the area of the interface ( 21 , 50 ).