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Thread: Is this gear possible?

  1. #1
    Associate Engineer
    Join Date
    Feb 2017
    Posts
    1

    Is this gear possible?

    Does a gear exist that would allow the motor to drive two different sets of gears depending on back-driving resistance? In other words the gear would have two states:
    1) There is no resistance against the gears/motor => the motor drives the high speed gear and the high torque gear remains free to rotate
    2) There is resistance against the gears/motor => the motor drives the high torque gear and the high speed gear remains free to rotate
    In both of these circumstances the gears should be non back-drivable so that the system can lock without the motor maintaining a torque. I'm an engineering student working on a prosthesis project and so any knowledge/experience/advice in this area would be greatly appreciated. Thanks!

  2. #2
    Technical Fellow jboggs's Avatar
    Join Date
    Mar 2011
    Location
    Myrtle Beach, SC
    Posts
    719
    You might want to check the internal details of a "limited slip differential" and see if that might apply to your needs.

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