Actuating arrangement for shift elements of a transmission
AssigneeZF Friedrichshafen AG
InventorsMatthias Reisch, Juergen Wafzig
Life of this patent
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Abstract
An actuating system for at least first and second coaxially arranged shifting elements of a transmission, in particular, a dual-clutch transmission (1) with at least two coaxially arranged control devices for actuating the associated shifting elements. The control devices comprise at least one rotary drive (4, 5) and at least one control element (6, 7) which are coupled to one another by corresponding gearteeth such that rotational movement, of each rotary drive (4, 5), can be converted into an axial control movement of the associated control element (6, 7). The axial position of the teeth of the geartooth array, of each control element (6, 7), varies in the circumferential direction, at least over a certain range.
Claims20
An actuating system for at least first and second shifting elements (K1, K2) of a transmission being arranged coaxially with one another, the actuating system comprising:
- at least first and second control devices for respectively actuating the first and second shifting elements,
- the first and second control devices each comprising at least one rotary drive (4, 5) and at least one control element (6, 7) being coupled together by corresponding gearteeth, whereby rotational movement of each rotary drive (4, 5) being converted into axial control movement of the associated control element (6, 7), and the control elements (6, 7) being arranged coaxially with one another, and
- an axial position of teeth of a gearteeth set on each control element (6, 7) varies in a circumferential direction at least over a certain range.
An actuating system for at least first and second transmission shifting elements (K1, K2) being coaxially arranged with respect to one another, the actuating system comprising:
- first and second rotary drives (4, 5), each comprising a pinion gear (16, 17);
- first and second control elements (6, 7), each comprising a helicoidal gearwheel segment (12, 13), the first and the second control elements (6, 7) being arranged coaxially with respect to one another along an axis;
- a fixed ramp element (8, 22) being rotationally fixed to a housing (25);
- the gearwheel segment (12) of the first control element (6) being integral with an outer ramp element (23) actively communicating with the first transmission shifting element (K1), and the gearwheel segment (13) of the second control element (7) being integral with an inner ramp element (24) actively communicating with the second transmission shifting element (K2);
- the outer and the inner ramp elements (23, 24) each communicate with and are supported by the fixed ramp element (8, 22) such that each of the outer and the inner ramp elements (23, 24) being rotatable about and axially movable on the fixed ramp element (22) with respect to one another, the communication between the fixed ramp element (8, 22) and the respective outer and the inner ramp elements (23, 24) facilitating conversion of rotational drive into axial drive such that rotation of the pinion gear (16) of the first rotary drive (4) rotationally and axially drives the gearwheel segment (12) of the first control element (6) and the outer ramp element (23), and rotation of the pinion gear (17) of the second rotary drive (5) rotationally and axially drives the gearwheel segment (13) of the second control element (7) and the inner ramp element (24);
- and
- axial drive of the first control element (6) facilitating actuation of the first transmission shifting element (K1) and axial drive of the second control element (7) facilitating actuation of the second transmission shifting element (K2).
Dependencies are inferred from the claim text.