Actuation device
AssigneeLuK Lamellen und Kupplungsbau Beteiligungs KG
InventorsJeff Hemphill, Trevor McConnell, Patrick Lindemann
Life of this patent
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Abstract
The invention relates to an actuating apparatus that can be used, for example, as an actuating apparatus for a motor vehicle transmission, the select function and the shift function being guaranteed by this actuating apparatus and it being possible to effect this using exactly one electric motor, and it being possible, starting from an original gear, to alternatively engage at least three different target gears without it being necessary in between to shift into an intermediate gear.
Claims40
An actuating apparatus (1) for the impingement of at least two shift elements (42, 44) that are spaced apart from each other, each having at least a first engagement area (50, 52) for its actuation, comprising:
- a drive shaft (10) arranged to be driven by a motor in both rotational directions;
- the drive shaft (10) having a first thread profile (20);
- a positioning device (28) screwed onto the first thread profile (20) of the drive shaft (10) via a second thread profile (22) that is complementary to the first thread profile (20);
- and,
- a control element (30) that is connected to the positioning device (28) in a rotationally fixed manner which causes the positioning device (28) to be turned with the drive shaft (10) when the drive shaft (10) turns in a first rotational direction, at least one second engagement area (54) provided on the positioning device (28) being positioned on at least one first engagement area (50, 52) of at least one shift element (42, 44);
- wherein the control element (30) controls an axial displacement of the positioning device (28) in relation to the drive shaft (10) when the drive shaft (10) turns in a second rotational direction that is opposite the first rotational direction and with it an actuation of the at least one shift element (42, 44), on whose first engagement area (50, 52) the second engagement area (54) is positioned.
An actuating apparatus having a rotatably mounted drive shaft (10), said drive shaft (10) being movable about its longitudinal axis (26) in both rotational directions, namely in a first rotational direction (14) and a second rotational direction (16) opposite the first, and having a nut/threaded spindle assembly (18) that has a threaded spindle (20) and a nut (22) whose thread (120) engages the thread (40) of the threaded spindle (20), it being possible for the part of this nut/threaded spindle assembly (18), that faces or is closer to the drive shaft (10) in the power flow, that is, the threaded spindle (20) or the nut (22), to be rotationally driven by the drive shaft (10), and the other part of the nut/spindle assembly (18), that is, the nut (22) or the threaded spindle (20), being coupled to a positioning device (28), especially fixedly coupled, so that the axial position of the positioning device (28) that is designed in the direction of the longitudinal axis (26) of the nut (22) or the threaded spindle (20) may be changed, a stop (34) being provided that limits the axial mobility of the positioning device (28) in the one orientation of the axial direction and it being possible to run up against stop (34) via turning of the drive shaft (10) in a first rotational direction (14), and this stop (34) causing the positioning device (28) to be moved in an essentially purely rotary or swiveling manner after the stop (34) is reached and the drive shaft (10) continues its rotary movement in the first rotational direction (14), and the positioning device (28) being designed in a rotationally asymmetric manner with respect to the rotary axis or swivel axis (26) that is assigned to this movement and/or has a positioning element (36) disposed in a rotationally asymmetric manner with respect to this rotary or swivel axis (26), the position of this positioning element (36) in the rotational direction being changed during its purely rotational or purely swiveling movement and at least one torsional lock that acts in one direction or at least one one-way clutch (102) acting in one direction being provided that can hold it in at least two rotary or swivel positions of the positioning device (28) in such a manner that in each of these holding positions, acting in one direction, a rotation or swiveling of the positioning device (28) about the rotary or swivel axis (26) is prevented if the drive shaft (10) is driven in the second rotational direction (16) so that the positioning device (28) in each case is then moved in an axial or translatory manner, when the rotary position remains the same, if the drive shaft (10) is driven in the second rotational direction (16) or is driven further.
Dependencies are inferred from the claim text.