Actuating Device

Actuator system as in at least one of the above claims,

• characterized in that
• a drive assembly (17) is interpositioned between the electric motor (14) and the ball nut (16).

Actuator system as in at least one of the above claims,

• characterized in that
• the electric motor (14) and the drive assembly (17) constitute a motor drive unit (19) attached, particularly in removable fashion, to an annular disk (18) horizontally mounted in the system enclosure (4).

Actuator system as in at least one of the above claims,

• characterized in that
• the annular disk (18) is provided on its side (20) facing the ball nut (16) with a ring extension (21) in which a connecting sleeve (22) is pivot-mounted, one end (23) of which latter is detachably connected to the motor-drive unit (19) while its other end (24) is removably attached to the ball nut (16).

Actuator system as in at least one of the above claims,

• characterized in that
• an additional volute spring (25) is located between the connecting sleeve (22) and the ring extension (21).

Actuator system as in at least one of the above claims,

• characterized in that
• a positional sensor (26) is provided in the advance mechanism (6) and specifically connected to the electric motor (14) with the spindle (5, 15).

Actuator system as in at least one of the above claims,

• characterized in that
• a casing (27) surrounds the ring extension (21) and the connecting sleeve (22) and is removably attached to the annular disk (18).

Actuator system as in at least one of the above claims,

• characterized in that
• the rotating sleeve (8) extends essentially from the ball nut (16) to an exit end (29) of the system enclosure (4) opposite the electric motor (14), the said rotating sleeve (8) featuring at least two guide slots (30, 31) in which matching guide lugs (32, 33), protruding radially relative to the rotating spindle (5, 15), can be moved in an axial direction (66).

Actuator system as in at least one of the above claims,

• characterized in that
• the guide lugs (32, 33) are mounted on a spindle head (35) that is removably attached to one end (34) of the rotating spindle (5).

Actuator system as in at least one of the above claims,

• characterized in that
• the spindle head (35) is provided on its side (36) facing away from the rotating spindle (5) with a rotary mount (37) for supporting one end (38) of the actuator element (7).

Actuator system as in at least one of the above claims,

• characterized in that
• the rotating sleeve (8) is rotatable relative to the casing (27) and that the volute spring (10) is positioned between these two components.

Actuator system as in at least one of the above claims,

• characterized in that
• the rotating sleeve (8) and the casing (27) feature mutually facing end sections (39, 40) having an essentially identical outer diameter (41, 42) and supporting the volute spring (10), the end section (39) of the the guide sleeve (28) being the circular flange (9).

Actuator system as in at least one of the above claims,

• characterized in that
• an enclosure lid (43) with a guide bore (44) for the actuator element (7) is located at the exit end (29) of the system enclosure (4).

Actuator system as in at least one of the above claims,

• characterized in that
• the enclosure lid (43) is provided with at least one sleeve insert (45) protruding into the system enclosure (4) and surrounding the rotating sleeve (8) while pivot-supporting the guide sleeve.

Actuator system as in at least one of the above claims,

• characterized in that
• the tensioning sleeve (13) is rotatably supported on the outside surfaces (46, 47) of the casing (27) and the sleeve insert (45).

Actuator system as in at least one of the above claims,

• characterized in that
• the tensioning sleeve (13) can be rotated by an electric tensioning motor (48) and in particular by a step motor.

Actuator system as in at least one of the above claims,

• characterized in that
• a cam (49) is provided particularly on the inside (50) of the tensioning sleeve (13), making contact with one coil end (51) of the volute spring (10).

Actuator system as in at least one of the above claims,

• characterized in that
• the tensioning motor (48) is housed in the system enclosure (4) beside the casing (27).

Actuator system as in at least one of the above claims,

• characterized in that
• a return spring (52) bearing on the tensioning sleeve (13) in the direction of the relaxed position is situated between the tensioning sleeve (13) and the system enclosure (4) or a component rigidly attached relative to the system enclosure.

Actuator system as in at least one of the above claims,

• characterized in that
• the said rigidly mounted component is the enclosure lid (43) and more specifically the sleeve insert (45).

Actuator system as in at least one of the above claims,

• characterized in that
• an additional cam (53) protrudes inward in essentially radial fashion from the inside (50) of the tensioning sleeve (13), said cam making contact with a coil end (54) of the torsion-type return spring (52).

Actuator system as in at least one of the above claims,

• characterized in that
• the enclosure lid (43) incorporates, opposite the sleeve insert (45), an outer sleeve (55) which surrounds the actuator element (7).

Actuator system as in at least one of the above claims,

• characterized in that
• the outer sleeve (55) is provided at its free end (56) with a detachable end cap (57) featuring an exit hole (58) for the essentially rod-shaped actuator element (7).

Actuator system as in at least one of the above claims,

• characterized in that
• the outer sleeve (55) is at least partly filled with a fluid, and at least one displacement element (59) protrudes within the outer sleeve (55).

Actuator system as in at least one of the above claims,

• characterized in that
• the displacement element (59) is in the form of a displacement disk (60) protruding radially from the actuator element (7) and having at least one fluid-conducting aperture (61).

Actuator system as in at least one of the above claims,

• characterized in that
• the system enclosure (4) is composed of at least two detachably connected enclosure sections (62, 63).

Actuator system as in at least one of the above claims,

• characterized in that
• one enclosure section (63) essentially constitutes the enclosure end cover housing the motor-drive unit (19).

Actuator system as in at least one of the above claims,

• characterized in that
• a fastening device (64) is provided on an outside surface (65) of the system enclosure (4) in the area of the enclosure lid (43) for removably attaching the control device (3).