Gearbox comprising an electromechanical actuator
AssigneeZF Friedrichshafen AG
InventorsBernd Somschor, Frank Miehle, Norbert Sommer, Jürgen Neuenfeld, Oliver Buchhold
Life of this patent
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Abstract
A transmission (8) for a motor vehicle (2) with a housing (26) and a shifting apparatus arranged therein and with an electromechanical transmission actuator (24) with a first electric motor (32) for exercising a selection motion of the shifting device with a second electric motor (34) for exercising a shifting motion of the shifting apparatus and with a control unit (22) for receiving sensor signals, for processing the sensor signals and for emitting control signals to the electric motors (32, 34) the axis of rotation of the first electric motor (32) and the axis of rotation of the second electric motor (34) lie parallel to each other.
Claims24
An electromechanical transmission actuator (24) which includes a first drive device for implementing a selection motion of a shifting apparatus in a transmission housing (26) of a transmission (8) of a motor vehicle (2) with a first electric motor (32, 106), a second drive device for exercising a shifting motion of the shifting apparatus with a second electric motor (34, 108) and a control unit (22, 204) for receiving sensor signals for processing the sensor signals and for issuing control signals to the first and second electric motors (32, 34, 106, 108, 208), and
- wherein a nut (74) is arranged directly between two spring apparatus (76, 78) inside a control cylinder (50) provided on a spindle (52) for imparting a shifting motion to the shifting apparatus according to a direction of motion of the spindle (52).
A transmission (8) for a motor vehicle (2) with a housing (26) and a shifting apparatus arranged therein and with an electromechanical transmission actuator (24) which includes a first drive device for implementing a selection motion of a shifting apparatus in a transmission housing (26) of a transmission (8) of a motor vehicle (2) with a first electric motor (32, 106), a second drive device for exercising a shifting motion of the shifting apparatus with a second electric motor (34, 108) and a control unit (22, 204) for receiving sensor signals for processing the sensor signals and for issuing control signals to the first and second electric motors (32, 34, 106, 108, 208), and
- wherein a nut (74) is arranged directly between two spring apparatuses (76, 78) inside a control cylinder (50) provided on a spindle (52) for imparting a shifting motion to the shifting apparatus according to a direction of motion of the spindle (52).
An electromechanical transmission actuator (24) comprising:
- a first drive device comprising a first electric motor (32, 106) for imparting a selection motion to a gear shifting apparatus in a transmission housing (26) of a transmission (8) of a motor vehicle (2);
- a second drive device comprising a second electric motor (34, 108) for imparting a shifting motion to the gear shifting apparatus of the transmission (8);
- a control unit (22, 204) for receiving and processing sensor signals and for issuing control signals to the first and second electric motors (32, 34, 106,108, 208);
- and
- wherein the second electric motor (34, 108) drives a ball screw spindle (52) supporting a nut (74) and a control cylinder (50), and two separate spring apparatus are interposed directly between opposing sides of the nut (74) and the control cylinder (50) and rotation of the ball screw spindle (52) causes the nut to directly compress one of the two separate spring apparatus and motivates the control cylinder (50) to transmit the shifting motion to the gear shifting apparatus according to a direction of motion of the ball screw spindle (52).
Dependencies are inferred from the claim text.