Actuator of a steer-by-wire steering device of a motor vehicle and method for assembling an actuator of a steer-by-wire steering device
An actuator ( 10 ) of a steer-by-wire steering device of a motor vehicle comprises a housing ( 46, 146 ), a spindle ( 42, 142 ) and a positionally fixed spindle nut ( 43, 143 ) mounted so that it can rotate, which within the housing ( 46, 146 ) form a spindle drive ( 41, 141 ) for the axial displacement of the spindle ( 42, 142 ) relative to the spindle nut. An inertial mass ( 100, 300, 400, 400 a, 500, 600 ) is at least indirectly coupled to the spindle ( 142 ), taking into account the oscillation behavior of at least one component of the actuator ( 10 ), in particular the spindle ( 142 ).
1 . An actuator of a steer-by-wire steering device of a motor vehicle, comprising:
a housing;
a spindle drive with a spindle and a positionally fixed spindle nut rotatably mounted within the housing ( 46 , 146 ) for the axial displacement of the spindle relative to the spindle nut; and
an inertial mass fixedly coupled to the spindle at least indirectly, the inertial mass having a mass moment of inertia configured to at least dampen or prevent oscillation behavior of at least one component of the actuator.
2 . The actuator according to claim 1 , wherein the mass moment of inertia is a function of oscillation behavior of the spindle.
3 . The actuator according to claim 1 , wherein the inertial mass comprises a plurality of parts.
4 . The actuator according to claim 3 , wherein the inertial mass is coupled to the spindle by friction and/or in a material-bonded manner and/or in an interlocking manner.
5 . The actuator according to claim 1 , wherein the inertial mass has a cylindrical outer wall concentric with a longitudinal axis of the spindle, the cylindrical outer wall defining a bearing surface which co-operates at least indirectly with the housing and/or with a bearing bush.
6 . The actuator according to claim 1 , wherein when the spindle is coupled to a bearing sleeve, and wherein the inertial mass is at least partially surrounded by the bearing sleeve or the bearing sleeve is at least partially surrounded by the inertial mass.
7 . The actuator according to claim 6 , wherein an outer diameter of the inertial mass is smaller than or equal to an outer diameter of the bearing sleeve.
8 . The actuator according to claim 1 , wherein the inertial mass is formed at least in part by comprises a stud, which also serves configured and arranged to prevent the spindle from rotating relative to the housing.
9 . The actuator according to claim 1 , wherein the inertial mass is configured as a connecting component between the spindle and the bearing sleeve.
10 . A method for assembling the actuator of claim 1 , comprising coupling the inertial mass to the spindle in a plurality of steps.
11 . The method of claim 10 , wherein the plurality of steps includes a first step of coupling the inertial mass to the spindle using a screw connection.
12 . The method of claim 10 , wherein the plurality of steps includes a first step of coupling the inertial mass to the spindle using a press-fit connection.
13 . The method according to claim 10 , comprising:
making the inertial mass in at least two parts consisting of a supporting component and at least one mass component;
coupling the supporting component to the spindle; and
fitting, subsequently, the at least one mass component onto the supporting component.