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Interesting Mechanisms:
Non-backdrivable output shaft arrangement for drill chuck loading:
This design I ran across while taking apart a Dewalt drill in order to use it's gearbox. Upon further inspection of the gearbox I realized that there is a simple mechanism that does not allow the gearbox to be backdriven but still allows for a fairly efficient geartrain. This gives the user the ability to load the chuck of the drill easily.
Constant Gear Reduction Knee That Considers Kinematics of Standing:
This is a design I've been flushing out in my spare time recently that's sole purpose is to provide a constant "moment arm" so that the torque in the knee motor is always directly proportional to the resulting vertical force at the hip. The design consists of a unactuated ankle and hip pin. The hip pin is located on a slider while the ankle is just a simple pin joint. The knee actuator consists of a motor and either a 4-bar linkage or cam design that would cater the knee's torque profile to provide a specified force upward at the hip's slider. ***Diagrams to come soon***
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