| 摘要 |
A power door lock actuator including: a housing; a bi-directional electric motor; a threaded shaft drivingly connected with the drive shaft of the motor; a drive armature threadingly engaged with the threaded shaft, wherein the drive armature has a first abutment at its distal end; a driven armature which is axially slidable relative to the drive armature over a preset distance of travel determined by a second abutment at its distal end and a third abutment spaced the preset distance from the distal end; a first spring which biases the drive armature toward a one end of the threaded shaft; and a second spring which biases the drive armature toward the other end of the threaded shaft When the motor is not operating the first and second springs cooperate to biasably locate the drive armature to a neutral position so that lost motion travel of the driven armature with respect to the drive armature is provided and the motor is not back-driven whenever the lock mechanism is manually actuated.
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